TW201739530A - Method for edging and device for edging - Google Patents

Abstract

The edging method disclosed in the invention, according to at least one information obtained from the steel slabs before and after edging, varies the incident angle of the said steel slab with respect to a pair of edging members that is disposed on a steel slab conveying line and performs edging to the steel slab.

Description

Edge grinding method and edging device Field of invention

The invention relates to an edging method and an edging device.

Background technique

In the rough rolling step of the hot rolling pass, there is a case where a so-called bending deformation of the steel sheet occurs. In the rough rolling step, as one of the causes of bending of the steel sheet, for example, a temperature deviation in the width direction of the steel granule which occurs in the heating furnace.

In the technique disclosed in Japanese Laid-Open Patent Publication No. Hei No. 3-254301, when there is a temperature deviation in the width direction of the steel slab, the pair of models are relatively moved in the direction of the conveyance line, and the pair of side guides on the flow line side are matched. The center of the conveying line of the edging device moves to suppress bending.

Further, in the technique disclosed in Japanese Laid-Open Patent Publication No. SHO-62-96943, the center position of the width direction of the steel slab is made by providing a guiding device for the guide roller on the inlet side or the outlet side of the slab of the sizing press. The center position of the width direction of the press is uniform to restrict the steel blank and suppress bending.

Summary of invention

In the technique disclosed in Japanese Laid-Open Patent Publication No. Hei No. 3-254301, the steel sheet is bent at the exit side of the edging apparatus, but the thickness of the side surface portion in the width direction of the steel skeleton section of the dog bone shape occurs. Deviation (asymmetry in the thickness distribution).

Further, in the method of Japanese Laid-Open Patent Publication No. SHO-62-96943, when the temperature deviation occurs in the width direction of the steel blank, it is not possible to suppress the bending of the steel preform on the outlet side of the press. Further, variation in thickness (asymmetry in thickness distribution) occurs in both side portions of the steel embryo section in the width direction.

Although there is no bending after the press, when the thickness deviation (asymmetry of the thickness distribution) occurs in the side portions on both sides in the width direction of the steel blank section, the thickness is thick after the rolling by the horizontal roller. The side will extend longer in the longitudinal direction than the thin side of the plate, and as a result, the steel embryo is bent.

In view of the above facts, the present invention has an object of suppressing bending of a steel preform which occurs through the edging step of the steel blank in the rough rolling step in the hot rolling pass.

The edging method of the present invention is an incident angle of the steel slab of a pair of edging equipment disposed on a conveying line of the steel slab and edging the steel slab, according to the edging front and the edging The information on the aforementioned steel embryos obtained by at least one of them has changed.

The edging device of the present invention comprises: a pair of edging equipment arranged on a conveying line of the steel slab, and pressed from both sides of the width direction of the steel slab Pressing and tempering the steel blank; the steel embryo incident angle changing device is disposed on the upstream side of the transport line more than a pair of the edging equipment, so that the incident angle of the steel embryo is changed; Obtaining the equipment, which is to obtain the steel embryo information of at least one of the edging and the edging; and the steel embryo incident angle control device, which controls the steel embryo according to the steel embryo information obtained by using the steel embryo information obtaining device The angle of incidence changes the device.

The present invention can suppress the bending of the steel blank which occurs through the edging step of the steel blank during the rough rolling step in the hot rolling pass.

10‧‧‧heating furnace

10A‧‧‧Export

12‧‧‧ horizontal rolling mill

14‧‧‧Upright roller

16‧‧‧ horizontal rolls

18‧‧‧ horizontal rolls

19‧‧‧ winding roller

20‧‧‧Edge grinding device

22‧‧‧Edged components

24‧‧‧ board components

24A‧‧‧ board

26‧‧‧Temperature Sensor

28‧‧‧Control device

30‧‧‧ Pressing members

32‧‧‧Mobile agencies

40‧‧‧Edge grinding device

42‧‧‧CCD camera

44‧‧‧ Distance sensor

50‧‧‧Edge grinding device

52‧‧‧CCD camera

60‧‧‧Edge grinding device

62‧‧‧CCD camera

62A‧‧‧Photographing area

70‧‧‧Edge grinding device

72‧‧‧CCD camera

74‧‧‧ Distance sensor

80‧‧‧Edge grinding device

82‧‧‧Mobile agencies

84‧‧‧ Roller components

B‧‧‧Rough strips

C‧‧‧Transfer direction

L‧‧‧Transport line

LC‧‧‧Transport Center

LF‧‧‧ side

LP‧‧‧ side section

S‧‧‧ steel embryo

SC‧‧‧Steel Embryo Center

SCB‧‧‧Steel Center

W‧‧‧Steel embryo width direction

Fig. 1 is a schematic configuration diagram of a rough rolling step of a hot rolling pass used in the edging method and the edging apparatus according to the first embodiment.

Fig. 2 is a plan view showing the outline of the edging apparatus of the first embodiment.

Fig. 3 is a plan view showing a state before the edging of the slab in the edging apparatus of the first embodiment.

FIG. 4 is a plan view showing a state in which the steel fiber end end side held by the pair of plate members is moved in the width direction of the conveyance line and the incident angle is given to the steel sheet, while the front end side of the edging steel is displayed. .

FIG. 5 is a plan view showing a state in which the tail end side of the steel blank is moved more toward the conveyance line width direction than the state of FIG. 4 to increase the incident angle.

FIG. 6 is a plan view showing a state in which the tail end side of the steel blank is moved further in the transport line width direction than the state of FIG. 5 to increase the incident angle.

Fig. 7 is a plan view showing a state in which the tail end side of the steel blank is edging.

Figure 8 is a view showing that the steel slab after edging is moved to be located more than the edging member A plan view of the state of the conveyor line downstream.

Fig. 9 is a plan view showing a state in which a steel edging is performed by the edging method of Comparative Example 1.

Fig. 10 is a plan view showing a state in which a steel edging is performed by the edging method of Comparative Example 2.

Fig. 11 is a conceptual diagram showing the cross-sectional shape of the steel embryo before the edging and the temperature distribution in the width direction of the steel slab.

Fig. 12 is a conceptual diagram showing the cross-sectional shape of a steel blank after edging.

Fig. 13 is a plan view showing a state before the edging of the slab in the edging apparatus of the second embodiment.

Fig. 14 is a sectional view taken along line L14-L14 of Fig. 13 and showing an apparatus for determining the deviation of the thickness of the steel blank in the width direction before the edging.

Fig. 15 is a cross-sectional view showing a device for use in the edging apparatus according to the second embodiment, which is a cross-sectional view corresponding to Fig. 14 for obtaining a variation in thickness in the width direction of the slab before edging. ).

Fig. 16 is a cross-sectional view showing a second modification of the edging apparatus according to the second embodiment, which is a cross-sectional view corresponding to Fig. 14 for obtaining a variation in thickness in the width direction of the slab before edging. ).

Fig. 17 is a conceptual diagram showing a cross-sectional shape of a steel blank after edging (a conceptual diagram corresponding to Fig. 12).

Fig. 18 is a plan view showing a state before the edging of the slab in the edging apparatus of the third embodiment.

Fig. 19 is a conceptual view showing a cross-sectional shape of a steel blank after edging (a conceptual diagram corresponding to Fig. 12).

Figure 20 is a plan view showing the outline of the edging apparatus of the fourth embodiment. Figure.

Fig. 21 is a plan view showing a state before the edging of the slab in the edging apparatus of the fourth embodiment.

FIG. 22 is a plan view showing a state in which the steel fiber tail end side held by the pair of plate members is moved in the width direction of the conveyance line and the incident angle is given to the steel sheet, while the front end side of the slab is trimmed. .

FIG. 23 is a plan view showing a state in which the tail end side of the steel blank is moved more toward the conveyance line width direction than the state of FIG. 22 to increase the incident angle.

FIG. 24 is a plan view showing a state in which the tail end side of the steel blank is moved further in the transport line width direction than the state of FIG. 23 to increase the incident angle.

Fig. 25 is a plan view showing a state in which the trailing end side of the steel blank is edging.

Fig. 26 is a plan view showing a state in which the slab after the edging is moved to a state where the edging apparatus is located downstream of the conveying line.

Fig. 27 is a plan view showing the outline of the edging apparatus of the fifth embodiment.

Fig. 28 is a sectional view taken along line L28-L28 of Fig. 27, showing the apparatus used for determining the variation in thickness in the width direction of the slab after edging.

FIG. 29 is a cross-sectional view showing a device used in order to obtain a variation in thickness in the width direction of the slab after edging according to a first modification of the edging apparatus according to the fifth embodiment (a cross-sectional view corresponding to FIG. 28) ).

Fig. 30 is a cross-sectional view showing a second modification of the edging apparatus according to the fifth embodiment, which is a cross-sectional view corresponding to Fig. 28, in order to obtain a variation in thickness in the width direction of the slab after edging. ).

Fig. 31 is a plan view showing a modification of the edging apparatus of the first embodiment.

FIG. 32 is a plan view showing a state in which the steel blank held by the pair of roller members is moved in the width direction of the conveyance line and the incident angle is given to the steel sheet in the edging method using the edging apparatus of FIG. 31.

Form used to carry out the invention

Hereinafter, the edging method and the edging apparatus according to the embodiment of the present invention will be described with reference to the drawings.

<First embodiment>

Before the edging method and the edging apparatus of the first embodiment are described, the hot rolling process of the steel sheet will be described with reference to Fig. 1 .

(hot rolling process)

As shown in Fig. 1, in the rough rolling step in the hot rolling pass of the steel sheet, first, the steel preform S heated to a specific temperature by the heating furnace 10 is discharged from the discharge port 10A of the heating furnace 10, and placed on the conveying line L. . This conveyance line L is a route for conveying the steel blank S discharged from the discharge port 10A in a downward direction in the conveyance direction (direction indicated by an arrow C in FIG. 1), for example, by a roller conveyor or heat resistance. Belt conveyor and the like. Moreover, the conveyance line L is not limited to the above-described conveyor as long as it can convey the steel slab S.

Then, the steel blank S discharged from the heating furnace 10 is cut in the width direction by the edging device 20 of the present embodiment (hereinafter referred to as "edging" as appropriate). The slabs S which have been edging by the edging apparatus 20 are conveyed along the conveyance line L to the downstream horizontal rolling mill 12.

The steel sheet S conveyed to the horizontal rolling mill 12 utilizes a horizontal rolling mill 12 is rolled in the plate thickness direction (the direction indicated by the arrow T in FIGS. 11 and 12) (hereinafter referred to as "rolling" as appropriate).

The rolled steel slab S is repeatedly moved between the vertical roller 14 which is lower than the horizontal rolling mill 12 and located downstream of the conveying line L, and the horizontal roller 16 which is located downstream of the vertical roller 14, and is repeatedly moved according to the vertical roller 14 The edging and rolling according to the horizontal roller 16 are performed. Thereby, the steel blank S is formed into a semi-finished product called a thick strip B, for example, having a thickness of about 40 mm.

Thereafter, the thick strip B is transferred to the final rolling step in the hot rolling pass, and a plurality of (four in the present embodiment) horizontal rolls 18 are used for final rolling, and the winding rolls 19 are used for winding.

(edging device)

Next, the edging apparatus of this embodiment will be described.

As shown in Fig. 2, the edging device 20 is a device for edging the steel slab S discharged from the heating furnace 10 in the rough rolling step, and includes an edging member 22 as an example of a pair of edging equipment, and a steel slab. One of the examples of the incident angle changing device is the plate member 24, the temperature sensor 26 as an example of the steel embryo information acquiring device, and the control device 28 as an example of the steel beam incident angle control device. Further, in FIGS. 4 to 8, the control device 28 and the temperature sensor 26 are omitted.

The pair of edging members 22 are disposed on the conveying line L of the steel slab S, and are configured to be pressed from both sides in the width direction of the steel slab S to squash the steel slabs S. Specifically, the edging member 22 can be in the same direction as the width direction of the steel sheet S before the edging (the direction indicated by the arrow W in FIG. 2) by the pressing mechanism 30. mobile. The pair of edging members 22 repeatedly press the steel slab S from the both sides in the width direction by the pressing force from the pressing mechanism 30. Make it edging. This pressing mechanism 30 is controlled by a control device 28 which will be described later. Further, the pressing mechanism 30 may be, for example, a mechanism using an electric motor or a mechanism using a hydraulic cylinder.

The pair of plate members 24 are disposed on the upstream side of the conveyance line L with respect to the pair of edging members 22, and are guides that extend toward the pair of edging members 22 along the conveyance line L. The plate member 24 can be moved in the width direction of the conveyance line L by the moving mechanism 32, and can be inclined with respect to the conveyance line center LC (the center of the conveyance line L in the width direction). Further, the pair of plate members 24 hold the steel sheet S from both sides in the width direction by the moving force from the moving mechanism 32, and are configured to adjust the position in the width direction of the conveyance line L of the steel sheet S and the incidence to the center LC of the conveyance line Angle θ (details are described later). The moving mechanism 32 is controlled by a control device 28 which will be described later. Further, the moving mechanism 32 may be, for example, a mechanism using an electric motor or a mechanism using a hydraulic cylinder. Further, the plate surface 24A on the inner side (the conveyance line center LC side) in the width direction of the conveyance line L of the plate member 24 is configured to be in contact with the width direction side surface LF of the steel blank S.

The temperature sensor 26 is disposed between the heating furnace 10 and the edging device 20 in the width direction of the conveyance line L, and measures the temperature (surface temperature) of the steel slab S before the edging. The temperature information (temperature distribution) measured by the plurality of temperature sensors 26 is transmitted to the control device 28.

In the control device 28, the moving mechanism 32 is operated in accordance with the temperature distribution in the width direction of the steel sheet S transmitted from the plurality of temperature sensors 26 to control the width direction position on the conveying line L of the pair of plate members 24, respectively. For the angle of the LC center of the conveyor line. Specifically, in response to the temperature deviation in the width direction of the steel preform S, the control device 28 moves the trailing end of the side surface LFL from the lower side of the temperature of the steel preform S (hereinafter referred to as "low temperature side" as appropriate) away from the center of the conveying line LC. The way to control the moving mechanism 32. Thereby, the plate member 24 is moved in the width direction of the conveyance line L, and the conveyance line center LC is inclined, and the incident angle θ is given to the steel slab S. In addition, the "incident angle θ of the steel slab S" at this time means the incident angle with respect to the slab S of the pair of edging members 22 (the angle of the slab center SC of the center line LC of the conveyance line).

Further, in the control device 28, information such as the edging method of the steel blank, the size of the steel slab S, the edging amount of the steel slab S, and the steel type of the steel slab S are transmitted in addition to the temperature information of the steel slab S. For such information, the input from the external input device can also be input by the operator, and other methods can be used. In the control device 28, in addition to the temperature information of the steel preform S, at least one kind of information according to the edging method of the steel blank, the size of the steel slab S, the edging amount of the steel slab S, and the steel of the steel slab S makes the incident angle θ The change is also possible. In other words, the incident angle θ may be determined depending on the temperature distribution and at least one of the above-described information.

Further, a plurality of position sensors (for example, optical sensors) (not shown) for detecting the position of the steel S are provided on the transport line L, and the position information of the steel S on the transport line L is transmitted to the control. Device 28.

(Edge grinding method)

Next, the edging method of the first embodiment will be described. Further, the edging device 20 is used in the edging method of the present embodiment.

First, the temperature of the heated steel slab S discharged from the discharge port 10A of the heating furnace 10 is measured by a plurality of temperature sensors 26, and the measured temperature information (temperature distribution) is transmitted to the control device 28.

Next, as shown in FIG. 2, the steel sheet S is held from both sides by a pair of plate members 24, and the position in the width direction of the center line SC of the steel is aligned with the position in the width direction of the center line LC of the conveyance line (so-called center alignment). After that, as shown in Figure 3. The pair of plate members 24 are moved to the outer side in the width direction of the conveyance line L (the side away from the conveyance line center LC) to be separated from the steel blank S.

Next, the control device 28 based on the acquired temperature information controls the moving mechanism 32 to impart an incident angle θ to the steel blank S when the steel preform S has a temperature deviation in the width direction. Specifically, as shown in FIG. 4 to FIG. 6 , the steel sheet S is held again from both sides in the width direction by the pair of plate members 24, and the side surface LFL of the low temperature side of the steel sheet S is made in this state ( FIGS. 4 to 6 ). The incident angle θ is given to the steel blank S in such a manner that the rear end of the upper side of the steel blank S is away from the center line LC of the conveyance line. Further, the incident angle θ of the present embodiment is set in accordance with the temperature deviation in the width direction of the steel preform S and the edging of the steel blank S. Specifically, when the edge of the front end of the steel blank S is edging (refer to FIG. 4), since the bending is hardly generated, the incident angle θ is made zero or close to zero, depending on the ongoing grinding of the steel preform S. The incident angle θ is increased by the situation (in other words, the position after the edging in the longitudinal direction of the steel preform S) (see FIGS. 5 and 6). Next, the incident angle θ is reduced as the edge closer to the end of the steel blank S is reduced (refer to FIG. 7), and the incident angle θ is set to zero or close to zero at the edge of the end of the steel blank S. (Refer to Figure 8). Further, the amount of increase in the incident angle θ is increased as the temperature deviation in the width direction of the steel preform S increases. Moreover, the condition of the edging of the steel blank S is calculated based on the position information of the steel slab S from the position sensor.

Further, the incident angle θ varies depending on the temperature information of the steel preform S, and at least one of the information of the edging method of the steel blank S, the size of the steel slab S, the edging amount of the steel slab S, and the steel type of the steel slab S. good. In addition to the temperature information of the steel preform S, by further setting the incident angle θ based on the above information about the steel blank S, a more suitable incident angle θ of the steel slab S can be obtained.

Next, after moving the steel preform S to the lower flow of the conveyance line L than the pair of plate members 24, as shown in Fig. 7, the control device 28 causes the moving mechanism 32 to operate to return the width direction of the plate member 24 to the original position. At the same time, the inclination of the plate member 24 with respect to the center line LC of the conveyance line is returned to the original inclination. After that, as shown in FIG. 8 , the pair of plate members 24 are in a standby state in a state where the transport line L is separated in the width direction.

Moreover, when the steel preform S has no temperature deviation (or the lower limit value) in the width direction, the control device 28 maintains the pair of plate members 24 in a state of being separated from the steel sheet S (the state shown in FIG. 3). For this reason, the steel blank S is passed between the pair of plate members 24 and then edging by a pair of edging members 22.

Next, the effects of the first embodiment will be described.

First, the steel slab edging method which is not included in Comparative Examples 1 and 2 of the present invention will be described. Hereinafter, the difference in the effect of the present embodiment will be described. Hereinafter, as shown in FIG. 11, the case where the steel grain S has the temperature deviation in the width direction is demonstrated. In Fig. 11, the vertical axis K indicates the temperature of the steel slab S, and the temperature difference between both ends in the width direction of the steel slab S is represented by a temperature deviation ΔK.

In the first comparative example, as shown in FIG. 9, the position of the steel embryo center SC in the width direction of the steel sheet S is aligned with the position in the center line width direction of the conveyance line by the pair of plate members 24, and then the pair of plate members 24 are made. The steel blank S is edging in a state separated from the steel blank S (unconstrained state). In the edging method of Comparative Example 1, the steel slab S is edging by reciprocating the pair of edging members 22 symmetrically with respect to the center line LC of the conveyance line. At this time, the side surface portion LP on both sides is deformed to be larger than the center portion in the width direction of the steel blank S, and the thickness is increased to be a so-called dog bone shape. In the steel embryo S, there is no temperature deviation in the width direction. In the case of a difference, the cross-sectional shape of the steel blank S is symmetrical with respect to the steel core center SC, and no bending occurs. However, in the case where the steel sheet S has a temperature deviation in the width direction, the deformation resistance ratio of the side surface portion LPH on the high temperature side (hereinafter referred to as "high temperature side" in the case of the both side surface portions LP of the steel sheet S) The side portion LPL on the low temperature side is smaller and is easily deformed. For this reason, even if the amount of movement of the plate members 24 on both sides is the same, the side surface portion LPH on the high temperature side of the steel blank S is made larger than the side surface portion LPL on the low temperature side in the width direction. In other words, as shown in Fig. 11, the steel blank center SC (the line dividing the width dimension 2 of the steel preform S) before the edging in accordance with the center line LC of the conveyance line is moved to the side surface portion LPH on the high temperature side after being edging. , becomes the SCB indicated by a two-dot dotted line.

At this time, the side surface portion LPH on the high temperature side of the steel blank S is more likely to be deformed than the side surface portion LPL on the low temperature side, and therefore the thickness is increased (see a broken line in FIG. 11). For this reason, the cross-sectional shape of the steel slab S after the edging step (refer to the broken line in FIG. 11) is asymmetrical to the steel slab center SC (or the steel slab center SCB), that is, on both sides of the steel slab S The portion LP has a deviation from the sheet thickness.

Further, the variation in the deformation of the steel blank S also appears as a deviation in the longitudinal direction of the steel blank S. Specifically, in the side surface portion LPH on the high temperature side of the steel blank S, the elongation in the longitudinal direction of the steel blank S is increased, and in the side surface portion LPL on the low temperature side, the elongation in the longitudinal direction of the steel blank S is small. For this reason, the steel blank S bends the side surface LFH on the high temperature side in a convex shape when edging. As a result, the steel preform S after the edging step is bent according to the elongation deviation in the longitudinal direction of the steel slab S when the slab is smeared.

In this way, in the case where the steel preform S has a temperature deviation in the width direction, In the edging method of Comparative Example 1, when the edging step is performed, the steel sheet S is bent, and the thickness deviation occurs in the side portions LP of both sides of the steel slab S. When the steel slab S having the thickness deviation in the width direction is rolled by the horizontal rolling mill 12, the side surface portion LPH having the thick side is thicker than the thickness of the plate side in the side surface portions LP of the steel slab S The extension of the side surface portion LPL in the longitudinal direction is greatly changed, and the bending of the steel blank S is further increased.

On the other hand, in Comparative Example 2, which is equivalent to the Japanese Patent Publication No. 62-96943, the width direction position and the conveying line of the steel blank center SC of the steel sheet S are made by the pair of plate members 24 as shown in FIG. In a state where the width direction of the center LC is aligned, the steel embryo S is edged while maintaining the restrained state. In the Japanese Unexamined Patent Publication No. Sho 62-96943, the mechanism for the reduction of the bending is not described, but the inventors have tried to review the results and found that the following phenomenon occurs. In the edging method of the second embodiment, the position in the width direction of the steel blank center SC of the steel slab S is aligned with the width direction of the center line LC of the steel sheet S, and the edging portion of the steel slab S is continuously restrained. A moment M is generated. According to the moment M, in the side surface portions LP of the steel sheet S, the contraction force FC acts on the longitudinal direction of the steel sheet S in the side surface portion LPH on the high temperature side, and the tensile force FT is caused in the side surface portion LPL on the low temperature side. The length direction of the steel embryo S acts. For this reason, the steel slab S deformed by the edging is caused by the contraction force in the longitudinal direction on the side surface portion LP side on the high temperature side, and is less likely to be deformed than in the case of no restraint. On the other hand, in the side surface portion LPL on the low temperature side, the tensile force in the longitudinal direction is more likely to be deformed than in the case of no restraint. As a result, the variation in the ease of deformation of the side surface portion LPH on the high temperature side and the side surface portion LPL on the low temperature side is reduced in the side surface portions LP of the steel sheet S. For this reason, the bending and the thickness deviation of the steel blank S were smaller than those of the comparative example 1. however, The moment M caused by the above-mentioned restraint is not based on the temperature deviation information in the width direction of the steel slab according to the cause of the deviation of the bending or the thickness of the sheet. Therefore, the bending and the thickness deviation are not released, and the bending and the thickness deviation are not caused. Excessive situation.

The inventor continues to develop the above-mentioned review. If the temperature is distributed in the width direction of the steel blank S, it is possible to imagine the ease of deformation of the side surface portion LPH on the high temperature side and the side surface portion LPL on the low temperature side. Be the same degree.

In the present embodiment, the incident angle θ is given to the steel blank S so that the rear end of the side surface portion LFL on the low temperature side of the steel sheet S is away from the conveyance line center LC based on the acquired temperature information, as shown in Comparative Example 2, An appropriate moment M can be applied as compared with a case where the position in the width direction of the steel blank center SC of the steel sheet S is aligned with the position in the width direction of the center line LC of the conveyance line. In this way, among the side surface portions LP of the steel sheet S, the contraction force FC of the side surface portion LPH acting on the high temperature side and the extension force FT of the side surface portion LPL acting on the low temperature side are appropriately adjusted. Therefore, the degree of deformation of the side surface portion LPH on the high temperature side of the steel sheet S and the side surface portion LPL on the low temperature side can be made equal. As a result, the amount of deformation in the width direction of the steel sheet S, the amount of deformation in the thickness direction, and the amount of deformation in the longitudinal direction can be made to be equal to the side surface portion LPH on the high temperature side and the side surface portion LPL on the low temperature side, and the edging step can be suppressed. The bending of the subsequent steel blank S and the asymmetry of the cross-sectional shape of the steel embryo S in the width direction (that is, the thickness deviation). As a result, it is also possible to suppress the bending of the steel blank S in the case of rolling after the execution of the nozzle rolling mill 12. Further, in Fig. 12, the cross-sectional shape of the steel slab S after edging according to the present embodiment is indicated by a broken line, and the cross-sectional shape of the slab S after edging by the technique of Comparative Example 1 is indicated by a two-dot dotted line. Show.

In particular, in the present embodiment, as shown in Figs. 4 to 6, the incident angle θ is changed in accordance with the temperature deviation in the width direction of the steel preform S and the edging of the steel blank S. Specifically, when the edge of the steel slab S is edging, the incident angle θ is made zero or close to zero, and the edging of the slab S continues to increase the incident angle θ. The edging near the end of the steel blank S reduces the incident angle θ, and changes the angle of incidence θ to zero or near zero at the edge of the end of the steel blank S. For this reason, the contraction force FC of the side surface portion LPH acting on the high temperature side of the steel sheet S and the stretching force FT of the side surface portion LPL acting on the low temperature side can be further appropriately adjusted.

In the first embodiment, the incident angle θ is set by the surface temperature distribution of the steel blank S. However, the present invention is not limited to this configuration. For example, from the side LF of the steel slab S to the estimated average temperature in the specific range in the width direction or the surface temperature of the steel slab S, the temperature in the center of the thickness direction of the steel slab S is estimated based on the heat transfer theory, and the temperature deviation in the width direction of the steel slab is calculated. The configuration of the incident angle θ may be set based on the temperature deviation. In the case of this configuration, the characteristics such as the degree of easy deformation at the time of edge grinding of the steel blank S can be suppressed, and therefore, the steel preform which is subjected to the edging step of the steel blank can be suppressed because the accuracy can be obtained more accurately. Sb bending and thickness deviation in the width direction.

Further, in the first embodiment, the incident angle θ is changed in response to the edging of the steel blank S. However, the present invention is not limited to this configuration. For example, the incident angle θ may be a constant value. The above configuration is also applicable to the embodiment described later.

<Second embodiment>

Next, the edging method and the edging apparatus of the second embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and their description will be appropriately omitted.

As shown in FIG. 13, in the edging apparatus 40 of this embodiment, except that the CCD camera 42 is provided between the heating furnace 10 and the plate member 24 as an example of the slab information acquisition apparatus, the other structure is the first. The edging device 20 of the embodiment has the same configuration.

The CCD cameras 42 are disposed on both outer sides in the width direction of the transport line L, and are configured to photograph the side surfaces LF on both sides of the steel sheet S from the side. The image captured by the CCD camera 42 is transmitted to the control device 28.

In the control device 28 of the present embodiment, the variation in the thickness of the both side faces LF of the steel blank S is calculated based on the image information captured from the CCD camera 42. Next, the control device 28 operates the moving mechanism 32 to apply the incident angle θ to the steel blank S so that the side surface LFB having the thick side is separated from the center line LC of the transport line.

Next, the edging method of this embodiment will be described. Further, in the edging method of the present embodiment, the edging device 40 is used.

In the edging method of the present embodiment, the other configuration is the same as that of the first embodiment except that the thickness variation of the both side faces LF of the steel blank S is used instead of the temperature distribution in the width direction of the steel preform S to set the incident angle θ. The edging method is the same. Therefore, the order of control of the incident angle θ according to the slab S of the control device 28 is the same as that of FIGS. 4 to 6.

In the edging step of the present embodiment, the control device 28 based on the image information of the slab S obtained from the CCD camera 42 controls the moving mechanism 32 when the thicknesses of the both sides LF of the slab S are different. The steel beam S is given an incident angle θ. Specifically, the steel sheet S is held by the pair of plate members 24 from both sides in the width direction, and in this state, the thickness of the steel sheet S is the thick side surface LFB (the upper side in FIGS. 4 to 6). The rear end is separated from the conveyance line center LC in such a manner that the movement mechanism 32 is controlled to move the plate member 24 while being inclined, and the incident angle θ is given to the steel blank S. Further, the incident angle θ of the present embodiment is set in accordance with the variation in the thickness of the both side faces LF of the steel preform S and the wear of the steel blank S. Specifically, when the edge of the front end of the steel blank S is edging (refer to FIG. 4), since the bending deformation is hardly generated, the incident angle θ is made zero or close to zero, and the edging according to the steel blank S is performed. The situation continues (in other words, the edging position in the longitudinal direction of the steel sheet S), and the incident angle θ is increased (see FIGS. 5 and 6). Next, by decreasing the incident angle θ (see FIG. 7) with the edging near the end of the steel blank S, the incident angle θ is set to zero or a value close to zero at the edge of the end of the steel blank S ( Refer to Figure 8). Moreover, the amount of increase in the incident angle θ is increased as the thickness deviation of the both side faces LF of the steel blank S is larger. Moreover, the condition of the edging of the steel blank S is calculated based on the position information of the steel slab S from the position sensor.

Further, the incident angle θ differs from the thickness of the side LF of the steel slab S, and is also dependent on at least one of the edging method of the steel slab S, the size of the steel slab S, the edging amount of the steel slab S, and the steel type of the steel slab S. Information changes are better. In addition to the variation in the thickness of the side LF of the steel slab S, it is further possible to obtain a more suitable incident angle θ of the steel slab by setting the incident angle θ based on the above information about the steel slab S.

Next, the effects of the second embodiment will be described. Further, the effect obtained by the same configuration as that of the first embodiment is obtained. The description is omitted. Hereinafter, as shown in the hypothetical line (two-dotted line) of FIG. 17, a case where there is a variation in thickness on both side faces LF of the steel blank S will be described.

When the edging is performed in a state in which the thickness of the both sides LF of the steel sheet S is varied, the side surface portion LFA including the side surface LFA having a thin side (the left side surface in FIG. 17) is thicker than the thickness of the inclusion plate. The side portion LPB of the side side surface LFA (the right side surface in Fig. 17) is more easily deformed. For this reason, the side surface portion LPA whose thickness is thin on the side of the steel sheet S is larger than the side surface portion LPB whose thickness is thicker in the thickness direction (see a broken line in FIG. 17). Thereby, the variation in the thickness of the side LF on both sides of the steel slab S after the edging is increased. In this state, when the steel blank S is subjected to rolling according to the horizontal rolling mill 12, the side surface LFA having a thick side (the thin side before the edging) is raised after the edging. Produces a bend.

In this regard, in the present embodiment, even if there is a variation in the thickness on both side faces LF of the steel blank S, the incident angle θ of the steel blank S can be set in accordance with the variation in the thickness of the both side faces LF of the steel blank S. For this reason, it is possible to suppress the bending of the steel sheet S which occurs after the edging step of the steel blank S and the thickness variation in the width direction (see the broken line in FIG. 17). Thereby, the bending can be suppressed even if the steel blank S is subjected to rolling according to the horizontal rolling mill 12.

In the second embodiment, as shown in FIG. 14, the variation in the thickness of both sides in the width direction of the billet S is calculated based on the image information captured by the CCD camera 42. However, the present invention is not limited to this configuration. For example, as shown in FIG. 15, a plurality of distance sensors 44 are disposed above the transport line L at intervals in the width direction instead of the CCD camera 42, and the distance from the upper surface of the steel sheet S to be transported is measured, and the measured information is The reference may be calculated by calculating the variation in the thickness of the steel S in the width direction. Again, as shown in Figure 16, By using a moving mechanism (not shown), one distance sensor 44 is moved in the width direction of the transport line L, the distance from the upper surface of the steel S is measured, and the width direction of the steel S is calculated based on the measured information. The composition of the plate thickness deviation is also possible.

<Third embodiment>

Next, the edging method and the edging apparatus of the third embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and their description will be appropriately omitted.

As shown in Fig. 18, in the edging apparatus 50 of the present embodiment, in addition to the configuration in which the CCD camera 52 is provided as an example of the steel embryo information acquiring device between the heating furnace 10 and the plate member 24, other configurations are The edging device 20 of the first embodiment has the same configuration.

The CCD cameras 52 are disposed on both outer sides in the width direction of the transport line L, and are configured to photograph the side surfaces LF of the steel sheets S from the side. The image captured by the CCD camera 52 is transmitted to the control device 28.

In the control device 28 of the present embodiment, the friction coefficient deviation of the both side faces LF of the steel blank S is calculated based on the image information captured by the CCD camera 52. For example, the variation of the friction coefficient can be calculated from the difference in the state of the attached matter of the image information and the difference in the brightness distribution. For example, the friction coefficient of the edging member 22 is changed in the side surface LF on the side surface LF where the adhesion amount of the deposit (soil) is smaller than the side surface LF on the side where the amount of adhesion (soil) is small among the side surfaces LF on both sides. Since it is low, the friction coefficient deviation can be calculated from the difference in the adhesion amount of the attachments on the side LF on both sides. Further, for example, in the side surface LF of the both sides, the side surface LF on the side where the brightness is high is changed to the side surface LF having the lower side of the brightness, so that the friction coefficient is changed to be lower. The difference in brightness of LF is used to calculate the deviation of the friction coefficient. Then, the control device 28 operates the moving mechanism 32 to apply the incident angle θ to the steel blank S so that the side surface LFC (the upper side surface in FIG. 18 ) having the high friction coefficient is separated from the transport line center LC.

Next, the edging method of this embodiment will be described. Further, in the edging method of the present embodiment, the edging device 50 is used.

In the edging method of the present embodiment, the other configuration is the same as that of the first embodiment except that the friction coefficient of the both sides LF of the steel sheet S is used instead of the temperature distribution in the width direction of the steel sheet S to set the incident angle θ. The edging method is the same. Therefore, the order of control of the incident angle θ according to the slab S of the control device 28 is the same as that of FIGS. 4 to 6.

In the edging step of the present embodiment, the control device 28 based on the image information of the slab S obtained from the CCD camera 52 controls the moving mechanism 32 when the friction coefficients of the side faces LF of the slabs S are different. The incident angle θ is given to the steel embryo S. Specifically, the steel sheet S is held by the pair of plate members 24 from both sides in the width direction, and in this state, the friction coefficient of the steel sheet S is the side LFC of the large side (the side on the upper side in FIGS. 4 to 6) The rear end is separated from the conveyance line center LC in such a manner that the movement mechanism 32 is controlled to move the plate member 24 while being inclined, and the incident angle θ is given to the steel slab S. Further, the incident angle θ of the present embodiment is set in accordance with the variation in the friction coefficient of the both side faces LF of the steel preform S and the edging of the steel preform S. Specifically, when the edge of the front end of the steel blank S is edging (refer to FIG. 4), since the bending deformation is hardly generated, the incident angle θ is made zero or close to zero, and the edging according to the steel blank S is performed. The situation (in other words, the edging position in the longitudinal direction of the steel slab S) continues to increase the incident angle θ (see FIGS. 5 and 6). then, The incident angle θ is reduced as the edge closer to the end of the steel blank S is reduced (refer to FIG. 7), and the angle of incidence θ is set to zero or close to zero at the edge of the end of the steel blank S (refer to Figure 8). Further, the increase amount of the incident angle θ is increased as the friction coefficient deviation between the both side faces LF of the steel blank S is larger. Moreover, the condition of the edging of the steel blank S is calculated based on the position information of the steel slab S from the position sensor.

Further, the incident angle θ is different from the friction coefficient deviation of the both side faces LF of the steel blank S, and is also based on at least one of the edging method of the steel blank S, the size of the steel slab S, the edging amount of the steel slab S, and the steel type of the steel slab S. Information changes are better. In addition to the deviation of the friction coefficient of the side LF of the steel blank S, it is further possible to obtain a more suitable incident angle θ of the steel slab by setting the incident angle θ with reference to the above information about the steel slab S.

Next, the effects of the embodiment will be described. In addition, the description of the effects obtained by the same configuration as that of the first embodiment will be omitted. Hereinafter, as shown in the hypothetical line (two-dotted line) of FIG. 19, a case where the friction coefficient deviation occurs on both side faces LF of the steel blank S will be described.

When the edging is performed in a state in which the frictional coefficient is different in the side surface LF of the steel sheet S, the side surface portion LFC (the right side surface in FIG. 19) having the high friction coefficient has a low friction coefficient. The side portion LPD of the side side LFD (left side side in Fig. 19) is more difficult to deform. Therefore, as shown in FIG. 19, the side surface portion LPD having the lower friction coefficient of the steel sheet S is larger in the thickness direction than the side surface portion LPC having the higher friction coefficient (see the broken line in FIG. 19). Thereby, the variation in the thickness of the side LF on both sides of the steel slab S after the edging is increased. In this state, when in steel embryo S When the rolling according to the horizontal rolling mill 12 is performed, the side surface LFD having a thick side (the friction coefficient is a thin side) is swollen after the edging, and is bent.

In this regard, in the present embodiment, even if there is a variation in the friction coefficient on both side faces LF of the steel blank S, the incident angle θ of the steel blank S can be set in accordance with the variation in the friction coefficient of the side surface LFD of the steel blank S. For this reason, it is possible to suppress the bending of the steel sheet S which occurs after the edging step of the steel blank S and the thickness variation in the width direction (see the broken line in FIG. 19). Thereby, the bending can be suppressed even if the steel blank S is subjected to rolling according to the horizontal rolling mill 12.

In the third embodiment, the friction coefficient deviation of the both side faces LF of the steel preform S is calculated based on the information captured by the CCD camera 52. However, the present invention is not limited to this configuration. For example, the thickness deviation of the both side faces LF of the steel blank S is calculated from the information captured by the CCD camera 52, and the incident angle θ of the steel preform S may be determined based on the variation in the thickness of the steel sheet and the variation in the friction coefficient. In this case, since the CCD camera can be shared, the number of components constituting the device can be reduced.

<Fourth embodiment>

Next, the edging method and the edging apparatus of the fourth embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals, and their description will be appropriately omitted.

(edging device)

As shown in Fig. 20, in the edging apparatus 60 of the present embodiment, a CCD camera 62 is provided as an example of the slab information acquisition device on the edging outlet side of the slab S, and is configured to respond to the edging outlet of the steel slab S. The other configuration is the same as that of the edging device 20 of the first embodiment except that the bending in the side determines the configuration of the incident angle θ of the steel slab S.

The CCD camera 62 is disposed above the edging exit side of the slab S of the edging apparatus 60 (in other words, the downstream side of the pair of edging members 22), and is configured to photograph the edging portion of the slab S from above. The photographing area of the CCD camera 62 is set in an area indicated by a two-dot chain line in FIGS. 20 to 26. Further, the image captured by the CCD camera 62 is transmitted to the control device 28. In addition, in FIG. 21 to FIG. 26, the control device 28 and the CCD camera 62 are omitted.

In the control device 28 of the present embodiment, the amount of bending of the portion of the slab after the edging is calculated based on the image information transmitted from the CCD camera 62. For example, the amount of bending of the portion of the slab after the edging can be calculated from the displacement in the width direction of the conveying line L with the edging of the side LF of the steel slab S. In response to the calculated amount of the slanting of the slanting direction, the control device 28 causes the steel slab S to be separated from the center of the transport line LC by the rear end of the side LFI on the inner side of the curved side in the flank LF of the slab. The incident angle θ changes.

Further, in the control device 28, in addition to the image information of the edging portion of the steel blank S, as in the first embodiment, the edging method such as the steel blank, the size of the steel slab S, and the grinding of the steel slab S are also transmitted. Information on the amount of steel and steel grade of steel embryo S. In the control device 28, in addition to the image information of the edging portion of the steel blank S, at least one of the edging method of the steel blank, the size of the steel slab S, the edging amount of the steel slab S, and the steel type of the steel slab S are used. The information determines the angle of incidence θ.

(Edge grinding method)

Next, the edging method of the fourth embodiment will be described. Further, in the edging method of the present embodiment, the edging device 60 is used. Again, Next, a case where bending occurs on the edging outlet side of the steel blank S will be described.

First, as shown in FIG. 20, the heated steel sheet S is held from both sides by a pair of plate members 24, and the position in the width direction of the center line SC is aligned with the width direction of the center line LC of the conveyance line (so-center alignment). . Then, as shown in FIG. 21, the pair of plate members 24 are moved to the outer side in the width direction of the conveyance line L (the side separated from the center of the conveyance line LC), and are separated from the steel blank S.

Then, as shown in FIG. 22, the steel sheet S is held again from both sides in the width direction by the pair of plate members 24, and in this state, the steel sheet S is made to be the curved side surface LFI (in FIGS. 23 to 25). The middle side of the upper side) is separated from the center line LC by the center of the transport line, and the incident angle θ is given to the steel blank S. In addition, before the front end portion of the steel blank S enters a certain amount in the imaging region 62A, for example, one or more of the information set in advance, the temperature information of the steel preform S, the thickness deviation, and the friction coefficient deviation. In the information, the incident angle θ is determined, and the incident angle θ is calculated based on the amount of bending after the tip end portion of the steel preform S enters the imaging region 62A (details will be described later).

Next, as shown in Fig. 23, after the edging of the steel blank S is partially entered into the image capturing area 62A, the amount of warpage of the edging portion of the steel slab S is calculated based on the image information control device 28. After that, the control device 28 adjusts the amount of bending and the condition of the edging in accordance with the calculated amount of bending, and separates the rear end of the side surface LFI on the inner side of the curved steel S from the center of the transport line LC at the time of edging. The incident angle θ varies. Further, in the present embodiment, as shown in Fig. 24 in which the edging of the steel blank S is performed, the incident angle θ is gradually increased.

Next, as shown in FIG. 25, the control device 28 follows the steel embryo. The edge of the S is edging to reduce the angle of incidence θ. Next, the angle of incidence θ is set to zero or close to zero at the edge of the end of the steel blank S.

Further, the incident angle θ is in addition to the image information of the portion after the edging of the steel blank S, and is also based on at least one of the edging method of the steel slab S, the size of the steel slab S, the edging amount of the steel slab S, and the steel type of the steel slab S. It is better to change. In addition to the image information of the portion after the edging of the steel blank S, by further setting the incident angle θ based on the above information about the steel slab S, a more suitable incident angle θ of the steel slab S can be obtained.

Next, after moving the steel preform S to the downstream of the conveyance line L than the pair of plate members 24, as shown in Fig. 26, the control device 28 operates the movement mechanism 32 to return the position of the plate member 24 to the original position in the width direction. At the same time, the inclination of the plate member 24 with respect to the center line LC of the conveyance line is returned to the original inclination. After that, as shown in FIG. 26, the pair of plate members 24 are in a standby state in a state where the width direction of the conveyance line L is separated.

Next, the effects of the fourth embodiment will be described. In addition, the description of the effects obtained by the same configuration as that of the first embodiment will be omitted.

Even if the amount of edging on both sides of the steel slab S is the same, the bending occurs because the degree of deformation of the side portions LP is different. In other words, when the steel sheet S is edging, the side surface portion LP on the easy-deformable side is increased in thickness compared to the side surface portion LP on the non-deformable side, and the elongation in the longitudinal direction is also increased, so that the steel sheet S is bent and The thickness deviation in the width direction.

In the present embodiment, the rear end of the side SLI of the curved inner side LFI (the upper side surface LF in FIGS. 21 to 26) and the conveying line are made in accordance with the amount of bending of the steel slab S after the edging. Center LC separates the way in steel The embryo S imparts an incident angle θ. For this reason, compared with the configuration in which the incident angle θ is given to the steel blank S in response to the amount of bending of the steel slab S after the edging, the two side portions LP of the steel slab S can be appropriately adjusted to be included in the bending. The contraction force FC of the side surface portion LPO of the side surface LFO (the lower side surface in FIGS. 21 to 26) on the outer peripheral side and the stretching force FT acting on the side surface portion LPI including the side surface LFI which is the inner peripheral side of the curve. Thereby, the degree of easy deformation of the outer peripheral side surface portion LPO and the curved inner peripheral side surface portion LPI of the bending of the steel blank S can be adjusted, and the degree of easy deformation can be achieved to an equal degree. For this reason, it is possible to suppress the asymmetry of the cross-sectional shape of the steel slab S after the edging step and the cross-sectional shape of the steel slab in the width direction (that is, the thickness deviation).

In the fourth embodiment, the incident angle θ is determined based on information other than the amount of bending in the initial stage of the edging, but the present invention is not limited to this configuration. For example, from the initial stage to the later stage of the edging, the incident angle θ may be determined based on information other than the amount of bending and the amount of bending of the steel slab after the edging. Further, as the information other than the amount of warpage, for example, the temperature distribution of the steel slab S of the first embodiment, the thickness variation of the slab S of the second embodiment, and the friction of the steel slab S of the third embodiment are mentioned. Any one or more of the coefficients of the coefficient deviation. In this case, an appropriate steel slab S incident angle θ can be further obtained.

<Fifth Embodiment>

Next, the edging method and the edging apparatus of the fifth embodiment will be described. The same components as those in the fourth embodiment are denoted by the same reference numerals, and their description will be appropriately omitted.

(edging device)

As shown in Fig. 27, in the edging apparatus 70 of the present embodiment, in addition to the edging exit side of the steel blank S, a CCD camera 72 is provided as the steel embryo information. An example of the apparatus is configured to determine the incident angle θ of the steel preform S in accordance with the variation in the thickness of the side surface portions LP of the edging outlet side of the steel blank S, and the other configuration is the edging of the fourth embodiment. The device 60 has the same configuration.

The CCD camera 72 is disposed on both sides of the transport line L in the width direction of the edging outlet side of the slab S of the edging apparatus 70 (in other words, the downstream side of the pair of edging members 22), and is configured to photograph the steel slab from the side. The side portions LP on both sides of the edging rear portion of S. The image captured by the CCD camera 72 is transmitted to the control device 28.

In the control device 28 of the present embodiment, the variation in thickness is calculated from the maximum thickness portion of the side surface portions LP of the edging portion of the steel blank S based on the image information from the CCD camera 72. Next, the control device 28 operates the moving mechanism 32 to make the rear end of the side surface LFB of the thin side (the hard-to-deform side before the edging) among the side surface portions LP of the edging portion of the steel blank S. The steel wire S is given an incident angle θ in such a manner that the center of the transport line LC is separated.

Next, the edging method of this embodiment will be described. Further, the edging device 70 is used in the edging method of the present embodiment.

In the edging method of the present embodiment, the configuration and the fourth embodiment are set except that the thickness variation of the side surface portions LP of the steel blank S is used instead of the bending amount in the edging outlet side of the steel blank S to set the incident angle θ. The edging method of the form is the same. Therefore, the control sequence for the steel slab incident angle θ according to the control device 28 is the same as that of FIGS. 21 to 26.

In the edging step of the present embodiment, the control device 28 based on the image information of the slab S obtained from the CCD camera 72 calculates the variation in the thickness of the side surface portions LP of the edging portion of the slab S. After that, control In response to the calculated variation in the thickness of the plate and the condition of the edging, the device 28 causes the incident angle θ of the steel slab S to be separated from the center of the transport line LC by the thickness of the side surface LFB after the slab is thinned. Changed. Further, in the present embodiment, as shown in Fig. 24 in which the edging of the steel blank S is performed, the incident angle θ is gradually increased.

Next, as shown in Fig. 25, the control device 28 reduces the incident angle θ as it approaches the trailing end of the steel blank S. Next, the angle of incidence θ is set to zero or close to zero at the edge of the end of the steel blank S.

Further, the incident angle θ is different from the thickness deviation of the side surface portions LP of the steel slab after the edging, and the edging method of the steel slab S, the size of the steel slab S, the edging amount of the steel slab S, and the steel slab. At least one type of information on S's steel grades has changed. In addition to the variation in the thickness of the side portions LP of the two sides of the steel slab after the edging, the incident angle θ is further set based on the above information about the steel slab S, whereby a more suitable incident angle θ of the slab S can be obtained.

Next, after moving the steel preform S to the lower flow of the conveyance line L than the pair of plate members 24, as shown in Fig. 26, the control device 28 operates the movement mechanism 32 to return the position of the plate member 24 to the original position in the width direction. At the same time, the inclination of the plate member 24 with respect to the center line LC of the conveyance line is returned to the original inclination. After that, as shown in FIG. 26, the pair of plate members 24 are in a standby state in a state where the width direction of the conveyance line L is separated.

Next, the effects of the fifth embodiment will be described. The description of the effects obtained by the same configuration as that of the fourth embodiment will be omitted.

In the present embodiment, the thickness of the side surface portions LP in the rear portion of the steel sheet S is etched, and the thickness of the steel sheet S after the edge grinding is thin. The rear side LFB (the upper side surface in FIG. 27 and the right side surface in FIG. 28) is separated from the conveyance line center LC to impart an incident angle θ to the steel blank S. Therefore, compared with the configuration in which the incident angle θ is given to the steel blank S in response to the variation in the thickness of the side surface portions LP in the rear portion of the steel sheet S after the edging, the two side portions LP of the steel blank S can be The contraction force FC acting on the side surface portion LPA of the side surface LFA (the lower side surface in FIG. 27 and the left side surface in FIG. 28) having the thickness of the thickened side after the edging is appropriately adjusted and acting after the edging is included The plate thickness is the tensile force FT of the side portion LPB of the side LFB on the thin side. Thereby, it is possible to adjust the ease of deformation of the side surface portion LPA having a thick side and the side surface portion LPB having a thin side after the steel sheet S is edged, and it is possible to achieve an equal degree of easy deformation. For this reason, it is possible to suppress the asymmetry of the cross-sectional shape of the steel slab S after the edging step and the cross-sectional shape of the steel slab in the width direction (that is, the thickness deviation).

In the fifth embodiment, as shown in FIG. 28, the thickness variation of the side surface portions LP of the steel slabs S on the edging outlet side is calculated based on the image information captured by the CCD camera 72. However, the present invention is not limited to this. Composition. For example, as shown in FIG. 29, a plurality of distance sensors 74 are disposed above the transport line L at intervals in the width direction instead of the CCD camera 72, and the distance from the upper surface of the transported steel S is measured, and the measured information is The reference may be calculated by calculating the variation in the thickness of the steel S in the width direction. Further, as shown in FIG. 30, by using a moving mechanism (not shown), one distance sensor 74 is moved in the width direction of the transport line L, and the distance from the upper surface of the steel S is measured, and the measured information is used as a reference. It is also possible to calculate the variation in the thickness of the steel sheet S in the width direction of the edging outlet side.

In the first to fifth embodiments, the plate member 24 is used. The steel embryo S is configured to impart an incident angle θ, but the present invention is not limited to this configuration. For example, as shown in the edging apparatus 80 shown in FIG. 31 and FIG. 32, a pair of roller members 84 which are located on both sides of the steel slab S and which are freely rotatable in the axial direction of the steel slab S are used in the steel slab. S may be applied to the incident angle θ. These roller members 84 are configured to be movable in the width direction of the transport line L by the moving mechanism 82 controlled by the control device 28. In this way, in the case where the freely rotatable roller member 84 is used, the moving mechanism 82 can simplify the mechanism since it is not necessary to tilt the roller member 84 with respect to the conveyance line L. Further, since the roller member 84 can be rotated in conjunction with the conveyed steel preform S, the friction between the roller member 84 and the steel blank S can be suppressed.

In the first to fifth embodiments, the control device 28 controls the pressing mechanism 30 that moves the pair of edging members 22 in the width direction. However, the present invention is not limited to this configuration. For example, the configuration of the pressing mechanism 30 may be controlled by another control device different from the control device 28.

The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the scope of the invention. For example, the configuration of the first to fifth embodiments may be arbitrarily combined and used. That is, the information on the temperature distribution, the thickness deviation, the friction coefficient deviation, the amount of bending of the portion after the edging, and the variation in the thickness of the edging portion before the edging are combined with other information. It is also possible to determine the incident angle θ of the steel blank S.

Regarding the above embodiments, the following supplementary notes are further disclosed.

(Note 1)

An edging method for arranging an angle of incidence of the steel slab of a pair of edging equipment for arranging the steel slab on a conveying line disposed on a steel slab, according to at least before edging and after edging The information on the aforementioned steel embryo obtained by one has changed.

(Note 2)

The edging method according to the first aspect, wherein the information includes a temperature distribution in a width direction of the slab before edging, and an incident angle of the slab is changed in accordance with the temperature distribution.

(Note 3)

The edging method according to the first aspect, wherein the embossing of the steel slab after the edging is included in the information, and the incident angle of the steel slab is changed in response to the bending of the steel slab.

(Note 4)

The edging method according to the first aspect, wherein the information includes at least one of a thickness deviation of the slab in the width direction of the slab before and after edging, and the incident of the slab is caused by the variation in the thickness of the slab. The angle changes.

(Note 5)

The edging method according to the first aspect, wherein the information includes a deviation of a friction coefficient of the edging apparatus on both sides in a width direction of the slab before the edging, and the incident of the steel blast is caused by the deviation of the friction coefficient The angle changes.

(Note 6)

The edging method according to any one of the items 2 to 5, wherein, in addition to the above information, at least one of the edging method of the steel blank, the size of the steel slab, the edging amount of the steel slab, and the steel type of the steel slab To make the aforementioned steel embryo The angle of incidence changes.

(Note 7)

The edging method according to any one of the items 1 to 6, further comprising a moving member that is movable on a flow side of the steel slab and a steel slab that is located on an upstream side of the conveying line than the pair of edging apparatuses The side faces in the width direction abut, and the aforementioned incident angle is changed.

(Note 8)

An edging device comprising: a pair of edging devices arranged on a conveying line of a steel slab and pressed against the steel slab from both sides in a width direction of the steel slab; and a steel embryo incident angle changing device disposed in a The edging apparatus is further located on the upstream side of the transport line to change an incident angle of the steel blank; and the steel embryo information acquisition device obtains information of the steel embryo of at least one of the edging and the edging; and The steel embryo incident angle control device controls the steel embryo incident angle changing device according to the information of the steel embryo obtained by the steel embryo information obtaining device.

(Note 9)

The edging device according to the eighth aspect, wherein the steel embryo information obtaining device includes a device for obtaining a temperature distribution in a width direction of the steel blast before the edging, The steel embryo incident angle control device controls the steel embryo incident angle changing device in response to the temperature distribution described above.

(Note 10)

The edging device according to the eighth aspect, wherein the steel embryo information obtaining device includes a device for obtaining a bending amount of the steel slab after edging, The aforementioned steel embryo incident angle control device controls the bending amount of the aforementioned steel embryo The aforementioned steel embryo incident angle changing device is manufactured.

(Note 11)

The edging apparatus according to the tenth aspect, wherein the steel embryo information obtaining device includes a device for obtaining a thickness deviation of the steel slab in a width direction of at least one of the edging and the edging. The steel embryo incident angle control device controls the steel embryo incident angle changing device in accordance with the magnitude of the thickness deviation.

(Note 12)

The edging apparatus according to the eighth aspect, wherein the steel slab information acquiring device includes a device for obtaining a deviation of a friction coefficient of the edging apparatus on both sides in a width direction of the steel slab before edging, The steel embryo incident angle control device controls the steel embryo incident angle changing device in response to the deviation of the friction coefficient.

(Note 13)

The edging apparatus according to any one of the items 8 to 12, wherein the steel embryo incident angle changing device is provided on both sides of the steel preform, and is rotatable in an axial direction of the steel blank. A pair of roller members and a moving device that moves the roller members in the width direction of the steel preform.

(Note 14)

The edging apparatus according to any one of the items 8 to 12, wherein the steer incident angle changing device extends toward a pair of the edging apparatus and abuts the side surface of the slab in the width direction of the slab The plate member and a moving device for moving the plate member in the width direction of the steel preform.

20‧‧‧Edge grinding device

22‧‧‧Edged components

24‧‧‧ board components

24A‧‧‧ board

30‧‧‧ Pressing mechanism

32‧‧‧Mobile agencies

C‧‧‧Transfer direction

FC‧‧‧ Contraction

FT‧‧‧Extension

LC‧‧‧Transport Center

LF‧‧‧ side

LFL‧‧‧ low temperature side

LFH‧‧‧ high temperature side

LP‧‧‧ side section

LPL‧‧‧low temperature side section

LPH‧‧‧High temperature side section

M‧‧‧ torque

S‧‧‧ steel embryo

SC‧‧‧Steel Embryo Center

W‧‧‧Steel embryo width direction

Θ‧‧‧incident angle

Claims (14)

An edging method, which is an incident angle of the steel slab of a pair of edging equipment disposed on a conveying line of a steel slab and edging the steel slab, so that an incident angle of the steel blast is based on edging and grinding The information of the aforementioned steel embryo obtained by at least one of the latter changes. The edging method according to claim 1, wherein the aforementioned information includes a temperature distribution in a width direction of the steel slab before edging, and an incident angle of the steel slab is changed in accordance with the temperature distribution. The edging method according to claim 1, wherein the bending of the steel slab after edging is included in the foregoing information, and an incident angle of the steel slab is changed in response to bending of the steel slab. The method of edging according to claim 1, wherein the information includes a deviation of a thickness of the steel slab in a width direction of at least one of edging and edging, and an incident angle of the steel blast according to the deviation of the thickness Variety. The method of edging according to claim 1, wherein the aforementioned information includes a deviation of the friction coefficient of the edging apparatus, and the incident angle of the steel slab is changed according to the deviation of the friction coefficient, wherein the edging apparatus is edging The front side of the aforementioned steel embryo has two sides in the width direction. The edging method according to any one of claims 2 to 5, in addition to the foregoing information, according to the edging method of the steel preform, the size of the steel slab, the edging amount of the steel slab, and at least the steel of the steel blast. One is to change the incident angle of the aforementioned steel embryo. The edging method according to any one of claims 1 to 5, wherein the moving member is abutted against the widthwise side surface of the steel preform, and the incident angle is According to the change, the moving member is located on the upstream side of the transport line more than the pair of the edging devices, and is movable in the width direction of the steel preform. An edging device comprising: a pair of edging equipment arranged on a conveying line of a steel slab and pressed from both sides in a width direction of the steel slab to edging the steel slab; and an apparatus for changing an incident angle of the steel slab a pair of the edging apparatus is located on the upstream side of the transport line to change an incident angle of the steel blank; and the steel embryo information obtaining device obtains information of the steel embryo of at least one of the edging and the edging; And a steel embryo incident angle control device, which controls the steel embryo incident angle changing device according to the information of the steel embryo obtained by the steel embryo information acquisition device. The edging device of claim 8, wherein the steel embryo information obtaining device includes a device for obtaining a temperature distribution in a width direction of the steel blast before the edging, and the steel blast incident angle control device controls the incident angle of the steel blast according to the temperature distribution Change the device. According to the edging device of claim 8, the steel embryo information obtaining device includes a device for obtaining a bending amount of the steel blank after the edging, and the steel embryo incident angle control device controls the incident of the steel embryo according to the bending amount of the steel embryo. Angle change device. The edging apparatus of claim 10, wherein the steel slab information acquisition device includes a device for obtaining a thickness deviation of the slab in the width direction of the slab before and after edging, wherein the steel blast incident angle control device is responsive to the foregoing Large deviation of plate thickness Small, control the aforementioned steel embryo incident angle changing device. The edging device of claim 8, wherein the steel embryo information obtaining device comprises: a device for obtaining a deviation of a friction coefficient of the edging device, wherein the edging device has two sides in a width direction of the steel slab before edging, the steel The embryo incident angle control device controls the aforementioned steel embryo incident angle changing device in response to the aforementioned friction coefficient deviation. The edging apparatus according to any one of the items 8 to 12, wherein the steel blast incident angle changing device has: a steel slab on both sides of the steel slab, and is rotatable in an axial direction of the steel slab A pair of roller members and a moving device that moves the roller members in the width direction of the steel preform. The edging apparatus according to any one of the items 8 to 12, wherein the steel-frame incident angle changing device has a device that extends toward a pair of the edging apparatus and abuts the side surface of the slab in the width direction of the slab The plate member and a moving device for moving the plate member in the width direction of the steel preform.