CN104511824A - Wire saw and method for cutting a workpiece with a steel wire - Google Patents

Abstract

The invention provides a wire saw and a cutting method for cutting workpieces by using steel wires. The wire saw (10) is equipped with: a conveying winch (46) for moving the wire (11) between the wire lead-out device (20) and the wire recovering device (120), and a front side closer to the front side than the conveying winch (46). The lead-out side winch (31) that adjusts the tension of the steel wire (11a), and the recovery side winch (131) that installs the rear side wire (11b) that is closer to the rear than the delivery winch (46) and rotates to adjust the tension , formed by the front side steel wire (11a) moving between the lead-out side capstan (31) and the conveying capstan (46) and the rear side steel wire (11b) moving between the conveying capstan (46) and the recovery side capstan (131) ) cuts off the workpiece (12).

Description

Wire saw and cutting method for cutting workpiece with steel wire

technical field

The present invention relates to a wire saw for cutting a workpiece by pressing a running wire against the workpiece, and a cutting method for cutting the workpiece with the wire.

Background technique

Japanese JP2009-291154A discloses a wire saw that cuts a workpiece by running a fixed abrasive steel wire in which abrasive grains such as diamond are fixed to a core wire by electrolytic precipitation or resin, and bringing the wire into contact with the workpiece. In the wire saw disclosed in Japanese JP2009-291154A, the wire drawn out from the wire supply part is wound around the wire recovery part, and the steel wire moving between the wire supply part and the wire recovery part is brought into contact with the workpiece to cut the workpiece.

In the above-mentioned wire saw, a wire moving between the wire supply part and the wire recovery part is erected between a plurality of multi-groove rollers and arranged side by side in parallel, so that it is pulled by the plurality of multi-groove rollers to run in the same direction. . The workpiece can be simultaneously cut and processed into a plurality of sheets by pressing the workpiece against a plurality of cutting portions formed of the drawn wire.

In the aforementioned wire saw, in order to effectively cut the workpiece, it is necessary to maintain the tension of the wire constituting the cutting portion within an appropriate range. When the steel wire is excessively tensed, the wire breakage occurs. Therefore, the wire saw disclosed in JP2009-291154A separately includes rollers that are in pressure contact with the supply-side reel of the wire supply part and the recovery-side reel of the wire recovery part. In this wire saw, the supply-side reel and the collection-side reel are indirectly driven by driving the two pressure rollers on the supply side and the winding (recovery) side. Therefore, in the wire saw disclosed in Japanese JP2009-291154A, the pressure contact roller is slipped to absorb the tension change that is not synchronized between the supply side reel and the recovery side reel, thereby Realize the stabilization of the tension of the steel wire.

However, if one steel wire is lined up in parallel using a plurality of multi-groove rollers, it is drawn to run in the same direction to form a cutting part, and the steel wire that presses the workpiece against the cutting part is drawn out from the wire supply part. The subsequent tension of the wire in contact with the workpiece fluctuates due to the resistance generated by the contact with the workpiece. Therefore, it is difficult to make uniform the tension in all of the plurality of cut portions that cut the workpiece while pulling one wire in parallel.

Contents of the invention

An object of the present invention is to provide a wire saw and a cutting method for cutting a workpiece by a wire that can make tensions uniform in a plurality of cutting portions that cut a workpiece formed by pulling a single wire.

According to a certain aspect of the present invention, there is provided a wire saw, characterized by comprising: a wire supply unit that leads out the steel wire; a wire recovery unit that recovers the drawn-out steel wire; and a plurality of cutting units that supply the steel wire by pulling the steel wire. part and the above-mentioned steel wire recovery part to form the above-mentioned steel wire between the above-mentioned steel wire recovery part, and cut the workpiece; the conveying capstan rotates under the state where the above-mentioned steel wire between the above-mentioned steel wire supply part and the above-mentioned steel wire recovery part is erected, so that the above-mentioned steel wire movement; the lead-out side capstan is installed in the above-mentioned wire supply part and rotates in the state where the front side wire on the side closer to the above-mentioned wire supply part than the above-mentioned conveying capstan is erected, thereby adjusting the tension of the above-mentioned front side wire; and The recovery side capstan is installed in the above-mentioned wire recovery part and rotates in the state where the rear side wire nearer to the above-mentioned wire recovery part than the above-mentioned conveying capstan is erected to adjust the tension of the above-mentioned rear side wire. The cutting portion is formed by the front wire moving between the lead-out side capstan and the conveying capstan, and the rear wire moving between the conveying capstan and the collecting side capstan.

According to another aspect of the present invention, there is provided a workpiece cutting method in which a workpiece is cut with a wire drawn out from a wire supply unit and wound around a wire recovery unit, wherein the wire supply unit and the wire recovery unit The above-mentioned steel wire in between is erected on the conveying capstan and the above-mentioned conveying capstan is rotated, so that the above-mentioned steel wire is moved, and the tension of the front side steel wire on the side closer to the above-mentioned steel wire supply part of the above-mentioned conveying capstan is adjusted by the lead-out side capstan, and the tension is adjusted by the recovery side capstan. The tension of the rear side steel wire on the side closer to the above-mentioned wire recovery part of the above-mentioned conveying capstan is adjusted, and the tension is adjusted by the front-side steel wire moving between the above-mentioned lead-out side capstan and the above-mentioned conveying capstan under the state where the tension is adjusted. In the adjusted state, the rear wire moving between the conveying capstan and the collecting side capstan cuts the workpiece.

Description of drawings

FIG. 1 is a configuration diagram showing a wire saw and a cutting method for cutting a workpiece with a wire according to an embodiment of the present invention.

Fig. 2 is a front view of the wire saw according to the embodiment of the present invention.

Fig. 3 is a plan view of the wire saw according to the embodiment of the present invention.

Fig. 4 is a perspective view of the wire saw according to the embodiment of the present invention.

Fig. 5 is a sectional view taken along line A-A of Fig. 2 .

6 is a perspective view showing a pulley and an actuator inside a casing of the wire saw according to the embodiment of the present invention.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a wire saw 10 according to an embodiment of the present invention. The wire saw 10 has a wire supply unit that extracts the wire 11 , a wire recovery unit that recovers the drawn wire 11 , and a cutting unit formed between the wire supply unit and the wire recovery unit. The cutting section is formed by the wire 11 in the middle of moving between the wire supply section and the wire collection section, and cuts the workpiece 12 .

2 to 4 show a specific structure of the wire saw 10 . The wire saw 10 is provided with: a wire lead-out device 20 constituting a wire supply part, a wire recovery device 120 constituting a wire recovery part, and a process for internally pulling the moving wire 11 led out from the wire lead-out device 20 and recovered by the wire recovery device 120 . Machine main body 40. Hereinafter, in each of the drawings, three axes X, Y, and Z that are orthogonal to each other are set so that the X axis extends in an approximately horizontal front-rear direction, the Y axis extends approximately in a horizontal direction, and the Z axis extends in a vertical direction. The structure of the wire saw 10 will be described.

The wire lead-out device 20, the processing machine main body 40, and the wire recovery device 120 are arranged side by side in this order along the Y-axis direction. The wire lead-out device 20 and the wire recovery device 120 form a symmetrical structure, and each structure is the same. The steel wire leading device 20 and the steel wire recovering device 120 operate in the forward rotation direction and the reverse rotation direction respectively.

If the steel wire lead-out device 20 leads out the steel wire and the steel wire recovery device 120 recovers the steel wire, it is set as the forward rotation direction; 20 functions as a wire recovery device (wire recovery unit). In this case, only the feeding and collecting operations of the wire 11 are reversed. Therefore, in this embodiment, the wire feeding device 20 in the normal rotation direction will be described as a center. In addition, since the wire reel 122 to the rotary motor 134 of the wire recovery device 120 are respectively configured the same as the wire reel 22 to the rotary motor 34 of the wire lead-out device 20, detailed description thereof will be omitted. In addition, in the description of the normal rotation direction, like the lead-out side winch 31 and the recovery-side winch 131 described later, expressions such as "lead-out side" and "recovery side" are used as needed, and the arrows shown in FIG. The direction is set to the forward direction, which will be described below.

As shown in FIGS. 2 to 4 , the wire lead-out device 20 includes a frame 21 having a plurality of mounting legs 21 a. The stand 21 is configured to be horizontally installed via a plurality of extended mounting legs 21a. A bobbin 22 whose rotation axis extends along the X-axis direction is provided on the machine base 21 (see FIG. 2 ). The wire drum 22 winds the steel wire 11 around its drum portion to store the wire. The rotating shaft of the spool 22 is rotatably provided on the support stand 23 . The support stand 23 is attached to the frame 21 so as to be movable along the axial direction of the bobbin 22 (X-axis direction) while supporting the bobbin 22 in a rotatable state.

Here, the wire 11 wound around the spool 22 is used as a cutting tooth of the wire saw 10, and is constituted by a so-called fixed abrasive wire in the present embodiment. In the fixed abrasive steel wire, abrasive grains such as diamond are fixed around the steel wire as a core wire by electrolytic precipitation or resin. The wire 11 is not limited to a fixed abrasive wire, and may be another member as long as it can cut the workpiece 12 .

Although not shown, a lead-out motor for rotating the bobbin 22 is provided on the support stand 23 . The lead-out motor is a servo motor capable of changing the rotation speed of the wire reel 22 for wire supply. A control output line of a controller not shown is connected to the lead-out motor. Then, the lead-out motor rotates the wire reel 22 for wire supply at a predetermined speed based on a command from the controller, so that the wire 11 can be drawn out from the reel 22 .

A case 24 is assembled on the upper surface of the stand 21 (see FIG. 3 ). A vertical plate 25 perpendicular to the X axis and parallel to the YZ plane is attached to the front surface of the case 24 above the bobbin 22 . As shown in FIG. 2 , the vertical plate 25 is provided with a position detection mechanism 26 for detecting the position of the wire 11 drawn out from the spool 22 in the X-axis direction (axial direction of the spool 22 ).

The position detection mechanism 26 includes a pair of suspension rollers 26a, 26b which are pivotally supported on the swing plate 26c and on which the steel wire 11 drawn upward from the reel 22 is stretched, and detect the rotation angle of the swing plate 26c relative to the reference position. angle detection sensor not shown.

A pair of erection rollers 26a, 26b is provided at the other end of the swing plate 26c in the Y-axis direction so as to line up vertically. The swing plate 26c is pivotally supported by the vertical plate 25 in parallel. More specifically, in a state where the pair of suspension rollers 26a, 26b are positioned above the bobbin 22, the swing plate 26c is centered on a rotation axis parallel to the vertical axis (Z-axis), and one end in the Y-axis direction is centered. It is pivotally supported by the vertical plate 25 so as to be able to swing.

The wire 11 facing upward from the reel 22 is stretched in an S-shape on a pair of stretching rollers 26a, 26b of the position detection mechanism 26 . Therefore, if the lead-out position of the wire from the spool 22 deviates in the X-axis direction, the swing plate 26c will swing. Thus, if the angle sensor not shown in the figure detects the swing of the swing plate 26c, the support table 23 supporting the wire drum 22 is moved in the X-axis direction, so that the wire 11 drawn out from the wire drum 22 The export position is always constant.

The vertical plate 25 is provided with a tension device 27 for applying a constant tension to the wire 11 stretched over the pair of stretch rollers 26a, 26b of the position detection mechanism 26 and passing through the pair of stretch rollers 26a, 26b. The tension device 27 includes: a pair of guide rollers 27a, 27b for erecting the steel wire 11 passing through the pair of erection rollers 26a, 26b in an S-shape; The center of the guide rollers 27a, 27b is rotatably pivotally supported by a floating arm 27c of the vertical plate 25, and a torque motor (not shown) that rotates the floating arm 27c at a predetermined torque.

As the torque motor, a servo motor that generates constant torque through torque control can be used. A predetermined tension is given to the wire 11 stretched over the pair of guide rollers 27a, 27b provided at both ends of the floating arm 27c by an urging force applied to the rotation direction of the floating arm 27c by the torque motor.

Here, the vertical plate 25 is provided with a roller 28 for leading out the wire 11 to a position where an excessive load is not applied to the tension roller 26a incorporated in the swing plate 26c. In addition, the vertical plate 25 is provided with a load sensor for leading out the steel wire 11 that is used to bridge the steel wire 11 between the position detection mechanism 26 and the tension device 27 and detects the tension of the steel wire 11 between the position detection mechanism 26 and the tension device 27. 29.

The wire 11 stretched over the pair of guide rollers 27 a and 27 b is then led out via the lead-out side winch 31 provided on the vertical plate 25 .

In the wire recovery device 120 provided so as to be separated from the wire lead-out device 20 in the Y-axis direction, the wire 11 is initially installed on the recovery side capstan 131 . Then, the wire 11 passes through the tension device 127 of the wire recovery device 120 , the load sensor 129 for collecting the wire, and the position detection mechanism 126 , and is wound up on the reel 122 on the recovery side.

The processing machine main body 40 provided between the wire lead-out device 20 and the wire recovery device 120 configured as above draws the moving steel wire 11 led out from the wire lead-out device 20 and recovered by the wire recovery device 120 inside.

The processing machine main body 40 includes a casing 41 that houses a workpiece 12 that is an object to be cut that is cut by the moving wire 11 . The housing 41 is a box having a plurality of mounting feet 41a, and doors 41b, 41c for inserting and taking out the workpiece 12 are provided on the upper front.

As shown in FIG. 2 , an elevator 42 on which the workpiece 12 is placed on an upper portion thereof to lift the workpiece 12 is provided at the bottom of the inner side of the housing 41 . The elevator 42 includes a mounting table 42a on which the workpiece 12 is actually mounted, a support leg 42d provided on the upper end of the mounting table 42a, and an elevator main body 42b that moves the supporting leg 42d up and down together with the mounting table 42a. 42 d of support legs between the mounting base 42a and the lift main body 42b are surrounded by the corrugated hose 42c. Thereby, it is possible to prevent the intrusion of the cutting oil dropped on the workpiece 12 during cutting.

In addition, although it will be described later, a plurality of pulleys 43 ( FIG. 6 ) for pulling the steel wire 11 that is moving in the middle are provided inside the casing 41 and above the elevator 42 , and a part or all of the plurality of pulleys 43 are moved. The actuator 44 (Figure 6).

As shown in FIG. 1 , the wire saw 10 is provided with a conveying capstan 46 for erecting the wire 11 between the wire lead-out device (wire supply unit) 20 and the wire recovery device (wire recovery unit) 120 . The steel wire 11 is stretched around the conveying capstan 46 within a range of 360° or less. The steel wire 11 may be stretched over a range of 360° or more and wound around the conveying capstan 46 . In addition, a lead-out side winch 31 is provided in the wire lead-out device 20 , and a recovery-side winch 131 is provided in the wire recovery device 120 . The wire saw 10 is configured to cut the workpiece 12 with the front wire 11 a moving between the lead-out capstan 31 and the conveying capstan 46 and the rear wire 11 b moving between the conveying capstan 46 and the collecting capstan 131 .

The conveyance winch 46 rotates while the wire 11 in the middle of moving between the wire lead-out device 20 and the wire recovery device 120 is suspended, thereby moving the wire 11 . As shown in FIGS. 2 to 5 , the conveyance winch 46 is provided outside the casing 41 constituting the processing machine main body 40 so as to be exposed. Specifically, the conveyance winch 46 is provided on the side wall of the casing 41 on the side of the wire recovery device 120 .

The conveying capstan 46 is erected with steel wires 11 . As shown in FIGS. 4 and 5 , a pair of erecting rollers 47 and 48 for erecting the wire 11 on the conveying capstan 46 are provided near the conveying capstan 46 on the side wall of the housing 41 on the side of the wire recovery device 120 .

The conveying capstan 46 keeps the wire 11 moving at a constant speed. A drive motor 49 for rotating the conveying capstan 46 is provided on a side wall of the housing 41 on the side of the wire recovery device 120 . The drive motor 49 is a servo motor capable of changing the rotation speed of the conveying capstan 46 . A control output line of a controller not shown is connected to the drive motor 49 . The controller controls the conveyance winch 46 to always rotate at a constant speed via the drive motor 49 so that the wire 11 stretched over the conveyance winch 46 always moves at the same speed.

As shown in FIG. 1 , the wire saw 10 includes a first load sensor 51 and a second load sensor 52 for detecting the tension of the front wire 11 a that cuts the front and rear of the workpiece 12 , and a tension sensor for detecting the tension of the rear wire 11 b that cuts the front and rear of the workpiece 12 . The third load sensor 53 and the fourth load sensor 54 for detecting the tension.

As shown in FIG. 2 , the first load sensor 51 is provided on a side wall of the housing 41 on the side of the wire lead-out device 20 . As shown in FIGS. 4 and 5 , the second load sensor 52 to the fourth load sensor 54 are provided on the side wall of the housing 41 on the wire recovery device 120 side.

Specifically, the first load cell 51 is provided on the side wall of the casing 41 so as to bridge the wire 11 drawn out from the wire lead-out device 20 , that is, the wire 11 before being introduced into the inside of the casing 41 .

As shown in FIG. 5 , the second load sensor 52 is provided on the side wall of the casing 41 so that the wire 11 pulled out from the inside of the casing 41 and directed toward the conveying capstan 46 is bridged. The third load sensor 53 is provided on the side wall of the casing 41 so that the steel wire 11 runs from the conveying winch 46 to the inside of the casing 41 again. The fourth load sensor 54 is provided on the side wall of the casing 41 so as to bridge the wire 11 pulled out from the inside of the casing 41 and directed toward the wire recovery device 120 .

As shown in FIGS. 2 to 4 , the lead-out side capstan 31 of the vertical plate 25 provided on the wire lead-out device 20 is in a state where the wire 11 that is closer to the front side (the wire lead-out device 20 side) than the conveying capstan 46 is erected. The tension adjustment capstan is used to adjust the tension of the front side wire 11 a between the lead-out side capstan 31 and the conveying capstan 46 by rotating downward. The steel wire 11 is stretched around the lead-out side winch 31 within a range of 360° or less. The steel wire 11 may be stretched over a range of 360° or more and wound around the lead-out side winch 31 . A pair of laying rollers 32 and 33 for laying the wire 11 on the lead-out side winch 31 is provided near the lead-out side winch 31 of the vertical plate 25 .

A front side rotation motor 34 for rotating the lead-out side winch 31 is provided on the vertical plate 25 . The front side rotation motor 34 is a servo motor capable of changing the rotation speed of the lead-out side winch 31 . A control output line of a controller not shown is also connected to the front side rotary motor 34 .

On the other hand, the recovery-side capstan 131 of the vertical plate 125 provided on the wire recovery device 121 is rotated in a state where the wire 11 on the rear side (the wire recovery device 121 side) is erected than the conveyance capstan 46, thereby to the conveyance. The tension adjustment winch adjusts the tension of the rear side wire 11 b between the winch 46 and the recovery side winch 131 . The wire 11 is stretched around the recovery side winch 131 within a range of 360° or less. The steel wire 11 may be stretched over a range of 360° or more and wound around the recovery side winch 131 . A pair of erection rollers 132 and 133 for erecting the wire 11 on the recovery side winch 131 is provided near the recovery side winch 131 of the vertical plate 125 .

The rear side rotation motor 134 which rotates the recovery side winch 131 is provided in the vertical plate 125. As shown in FIG.

The rear rotation motor 134 is also a servo motor capable of changing the rotation speed of the recovery side winch 131 . A control output line of a controller not shown is also connected to the rear side rotation motor 134 .

As shown in FIG. 1 , the first load sensor 51 and the second load sensor 52 provided in the casing 41 (see FIG. 2 ) detect the tension of the front side wire 11 a before and after cutting the workpiece 12 . The third load sensor 53 and the fourth load sensor 54 detect the tension of the rear side wire 11 b before and after cutting the workpiece 12 . The detection output lines of the first load sensor 51 to the fourth load sensor 54 are connected to a controller not shown in the figure.

The controller controls the front side rotation motor 34 based on the detection outputs of the first load sensor 51 and the second load sensor 52 , and controls the rotation of the lead-out side winch 31 . Thus, the controller adjusts the tension of the front side wire 11 a moving between the lead-out side capstan 31 and the transport capstan 46 .

In addition, the controller controls the rear rotation motor 134 based on the detection outputs of the third load sensor 53 and the fourth load sensor 54 , and controls the rotation of the recovery side winch 131 . Thereby, the controller adjusts the tension of the rear side wire 11 b moving between the conveyance winch 46 and the recovery side winch 131 .

One steel wire 11 is moved at a constant speed by the conveying capstan 46, so that if the workpiece 12 is cut by the steel wires 11 before and after the conveying capstan 46, the front side wire 11a which previously cut the workpiece 12 is cut. The resistance is applied to the rear side wire 11b which cuts the workpiece 12 later. Therefore, there is a possibility that the tension of the front wire 11 a and the rear wire 11 b to be cut may differ from each other.

On the other hand, in this embodiment, the tension of the front side wire 11a is adjusted so as to control the rotation of the lead-out side winch 31, and the tension of the rear side wire 11b is controlled so as to control the rotation of the recovery side winch 131. Adjust the tension. Therefore, the tensions of the front wire 11a and the rear wire 11b can be individually adjusted. Thereby, the tension of the front wire 11 a and the rear wire 11 b that simultaneously cut the workpiece 12 can be made uniform, and the workpiece 12 can be cut more stably.

The first load sensor 51 and the second load sensor 52 detect the tension of the front wire 11a before and after cutting the workpiece 12, and the third load sensor 53 and the fourth load sensor 54 detect the tension of the rear wire 11b before and after cutting the workpiece 12. Tension is checked. Therefore, the tensions of the front wire 11 a and the rear wire 11 b are adjusted so that the values of the first load sensor 51 and the third load sensor 53 are equal, and the values of the second load sensor 52 and the fourth load sensor 54 are also equal. , so that equalized cutting can be performed more reliably. Here, since the moving speed of the wire 11 is kept constant by the conveying capstan 46, the moving speed of the wire 11 does not vary with tension adjustment.

When the wire 11 is moved by the rotation of the feeding capstan 46 , the wire 11 can be pulled out from the reel 22 of the wire lead-out device 20 by the rotation of the lead-out side winch 31 . When the lead-out amount from the lead-out side reel 22 increases with respect to the movement amount of the wire 11, the overall length of the wire 11 spanned over the pair of guide rollers 27a, 27b of the tension device 27 increases. Therefore, the floating arm 27c rotates in the left direction indicated by the solid arrow in FIG. 2 .

Conversely, if the lead-out amount of the wire 11 from the reel 22 on the lead-out side decreases, the overall length of the wire 11 stretched over the pair of guide rollers 27a and 27b decreases. Therefore, the floating arm 27c rotates to the right as indicated by the dotted arrow in FIG. 2 .

The rotation of the floating arm 27c from the neutral position is detected by an encoder (not shown). Based on the detection output of the encoder, the controller controls a motor (not shown) that rotates the wire reel 22 on the lead-out side to change and adjust the rotation speed of the wire reel 22 so that the movement amount of the conveying capstan 46 becomes The lead-out amount of the steel wire 11 is adjusted in the same manner. Thereby, the floating arm 27c can be maintained in a neutral position.

In the wire recovery device 120 , the wire 11 is recovered by rotating the winch 131 on the recovery side, and the recovered steel wire 11 is wound on the winding drum 122 on the recovery side. When the recovery amount of the spool 122 on the recovery side decreases, the overall length of the wire 11 stretched over the pair of guide rollers 127a and 127b of the tension device 127 increases. Therefore, the floating arm 127c rotates to the right as indicated by the solid arrow in FIG. 2 .

Conversely, when the recovery amount of the spool 122 on the recovery side increases, the total length of the wire 11 stretched over the pair of guide rollers 127a and 127b also decreases. Therefore, the floating arm 127c rotates leftward as indicated by the dotted arrow in FIG. 2 .

The rotation of the floating arm 127c from the neutral position is detected by an encoder not shown. Based on the detection output of the encoder, the controller controls the motor that rotates the reel 122 on the recovery side, thereby changing and adjusting the rotational speed of the reel 122 on the recovery side, and further in accordance with the speed of the steel wire 11 based on the conveying capstan 46. The amount of collection of the wire 11 is adjusted so that the moving amount becomes the same. Thereby, the floating arm 127c can be maintained in a neutral position.

In the processing machine main body 40 that draws the wire 11 between the wire lead-out device 20 and the wire recovery device 120 , the moving speed of the wire 11 pulled into the casing 41 is always constant by the rotation of the conveyance capstan 46 . In addition, inside the casing 41 , the front side wire 11 a and the rear side wire 11 b are spanned by a plurality of pulleys 43 . FIG. 6 shows the pulley 43 and the actuator 44 that moves all or part of the pulley 43 . Specifically, a top plate 41d (see FIG. 2 ) is provided above the workpiece 12 inside the housing 41, and the actuator 44 is provided on the top plate 41d.

6 shows a state where the front wire 11a is pulled toward the front side of the doors 41b, 41c (see FIG. 2 ) in the X-axis direction, and the rear wire 11b is pulled toward the inside of the doors 41b, 41c. Inside the casing 41 are provided four pulling rods 56-59 pivotally supporting the pulley 43 of the pulling steel wire 11 up and down. Specifically, on the side of the doors 41b and 41c in the X-axis direction, two pull rods, the first pull rod 56 and the second pull rod 57 , are provided side by side in the Y-axis direction. The pulley 43 pivotally supported by the first pulling rod 56 and the second pulling rod 57 pulls the front side wire 11a.

Two pulling rods, a third pulling rod 58 and a fourth pulling rod 59 , are arranged side by side in the Y-axis direction on the side away from the doors 41 b and 41 c . The pulley 43 pivotally supported by the third pulling rod 58 and the fourth pulling rod 59 pulls the rear side wire 11b.

The actuator 44 is configured to be able to move the plurality of pulleys 43 via four pull rods, namely, the first pull rod 56 , the second pull rod 57 , the third pull rod 58 , and the fourth pull rod 59 . The first pulling rod 56 is immovably fixed to the top plate 41d.

On the other hand, the second pull rod 57 is configured to be movable in both the Y-axis direction and the Z-axis direction by the actuator 44 . For the front side wire 11a that is suspended on the pulley 43 that is pivotally supported by the first pulling rod 56 and the second pulling rod 57 and cuts the workpiece 12, the first pulling rod 56 and the second pulling rod The distance in the Y-axis direction between 57 can be changed so that the total length can be changed. In addition, the front side wire 11a for cutting the workpiece 12 is configured such that the second pull rod 57 moves up and down in the Z-axis direction so as to be tiltable from the horizontal direction.

The actuator 44 is configured to be able to move the third pulling rod 58 in the X-axis direction. The fourth pull rod 59 is also configured to be movable in any direction in the three-axis directions.

Therefore, for the rear side wire 11b which is suspended on the pulley 43 pivotally supported by the third pulling rod 58 and the fourth pulling rod 59 and cuts the workpiece 12, the third pulling rod 58 and the fourth pulling rod The distance in the Y-axis direction between the tie rods 59 can be changed so that the total length can be changed. In addition, the rear side wire 11b for cutting the workpiece 12 is configured such that either one of the third pull rod 58 and the fourth pull rod 59 moves up and down in the Z-axis direction so as to be tiltable from the horizontal direction.

If the third pulling rod 58 and the fourth pulling rod 59 are moved along the X-axis direction, and the distance in the X-axis direction between the first pulling rod 56 and the second pulling rod 57 is changed, the The distance between the front wire 11a and the rear wire 11b is changed.

Next, a cutting method of cutting a workpiece with a wire according to the present embodiment will be described.

In the cutting method of cutting a workpiece with a steel wire according to the present embodiment, as shown in FIG. The steel wire 11 of 120 cuts the workpiece 12 method, in the state that the steel wire 11 between the steel wire lead-out device 20 and the steel wire recovery device 120 is erected on the conveying capstan 46, the conveying capstan 46 is rotated so that the steel wire 11 is moved, and then passed The tension of the front side steel wire 11a near the front side (steel wire lead-out device 20 side) of the lead-out side winch 31 is compared with the delivery winch 46 is adjusted, and the rear side of the back side (steel wire recovery device 120 side) is closer to the delivery side winch 131 than the delivery winch 46 through the recovery side winch 131 The tension of the steel wire 11b is adjusted, passing through the front side steel wire 11a moving between the lead-out side capstan 31 and the conveying capstan 46 under the state where the tension is adjusted and the conveying capstan 46 under the state where the tension is adjusted. The rear side wire 11 b moving between the recovery side winch 131 cuts the workpiece 12 .

In the case of using the wire saw 10 shown in FIGS. 42a (Fig. 2). At the same time, the steel wire 11 drawn out from the steel wire lead-out device 20 is pulled into the inside of the casing 41 and installed on the conveying capstan 46 .

Then, the steel wire 11 pulled out to the outside of the casing 41 is recovered by the steel wire recovery device 120 . At this time, since the conveying capstan 46 is exposed outside the casing 41 , it is relatively easy to lay out the pulling wire 11 and the like, and maintenance and inspection in the middle of the subsequent cutting operation are also easy.

Then, as shown in FIG. 6 , the plurality of pulleys 43 for pulling the wire 11 provided inside the housing 41 are moved by the actuator 44, thereby actually adjusting the front wire 11a and the rear wire 11b for cutting the workpiece 12. to the desired length and position.

As shown in FIG. 2 , in this state, the wire 11 stretched over the conveying capstan 46 is always moved at the same speed by rotating the conveying capstan 46 at a constant speed. Accordingly, the lead-out side capstan 31 provided in the wire lead-out device 20 also rotates, and the wire 11 is sequentially drawn out from the spool 22 of the wire lead-out device 20 . On the other hand, in the wire recovery device 120 , the recovery-side capstan 131 is rotated to wind and recover the wire 11 to the recovery-side reel 122 .

When the conveying capstan 46 is rotated, the front wire 11a and the rear wire 11b pulled into the casing 41 move in the longitudinal direction, respectively, so the elevator 42 raises the workpiece 12 together with the mounting table 42a in this state. Then, the workpiece 12 is brought into contact with both the front wire 11 a and the rear wire 11 b moving in the longitudinal direction. After that, the workpiece 12 is still raised, so that the workpiece 12 can be cut by the wire 11 .

When the workpiece 12 is cut off, the tension of the front wire 11a cutting the workpiece 12 is adjusted by the lead-out side winch 31, and the tension of the rear wire 11b cutting the workpiece 12 together with the front wire 11a is adjusted by the recovery side winch 131. Adjustment.

Passing the front side wire 11a moving between the lead-out side capstan 31 and the conveyance capstan 46 in the state where the tension is adjusted and between the conveyance capstan 46 and the recovery-side capstan 131 in the state where the tension is adjusted The moving rear wire 11 b cuts the workpiece 12 .

Here, the front wire 11 a and the rear wire 11 b that actually cut the workpiece 12 are constituted by one wire 11 . Therefore, the resistance generated during the cutting process of the front wire 11a that cuts the workpiece 12 before is applied to the rear wire 11b that cuts the workpiece 12 later, so that the front wire 11a and the rear wire that are cut are present. 11b has different concerns about the tension.

On the other hand, in the cutting method of cutting a workpiece with a wire according to the present embodiment, the rotation of the delivery side winch 31 is controlled on the basis of the rotation of the delivery winch 46 in front of the delivery winch 46 . The tension of the front side steel wire 11a is adjusted. In addition, the tension of the rear side wire 11 b present behind the transport capstan 46 is adjusted so as to control the rotation of the recovery side capstan 131 . Thereby, the tensions of the front wire 11a and the rear wire 11b can be individually adjusted, and the tensions of the front wire 11a and the rear wire 11b that simultaneously cut the workpiece 12 can be made uniform. Therefore, the workpiece 12 can be cut more stably.

In the wire saw 10 of this embodiment shown in FIGS. 2 to 5 , the wire 11 is pulled by a plurality of pulleys 43 inside the casing 41 . Therefore, the wire saw 10 is different from the conventional structure in which one wire 11 is pulled so as to run in the same direction between a plurality of grooved rollers.

Furthermore, since the wire saw 10 according to the present embodiment further includes the actuator 44 that moves some or all of the pulleys 43, the length, position, and angle of the front wire 11a and the rear wire 11b can be freely adjusted. Make adjustments. Therefore, even when the workpieces 12 to be cut have different sizes, the workpieces 12 having different sizes and shapes can be cut at desired positions and shapes.

In this embodiment, the operation of recovering the wire 11 drawn out from the wire lead-out device 20 to the normal rotation direction of the wire recovery device 120 via the conveying capstan 46 has been described.

In this case, after all the wire 11 drawn out from the wire lead-out device 20 is recovered to the wire recovering device 120, the wire recovering device 120 is set as the "lead-out side", so that the wire lead-out device 20 becomes The operation of the reverse direction of the "recovery side" is enough. By operating as described above, it is possible to repeatedly perform operations in the forward rotation direction and the reverse rotation direction. Thereby, the steel wire 11 can be used until it wears out, and cutting can be stably performed with the tension uniform. In addition, the workability and productivity of the cutting process can be improved.

According to the above embodiment, the following effects are obtained.

The wire saw 10 according to this embodiment includes: a wire lead-out device 20 that leads out the wire 11 ; a wire recovery device 120 that recovers the lead-out wire 11 ; A plurality of cutting parts for cutting the workpiece 12, a transport capstan 46 for moving the steel wire 11 by rotating the steel wire 11 between the wire lead-out device 20 and the steel wire recovery device 120, and the wire lead-out device 20 and The lead-out side capstan 31 which adjusts the tension of the front side wire 11a by rotating the front side wire 11a on the side closer to the wire lead-out device 20 than the conveyance capstan 46, and the wire recovery device 120 installed on the The recovery side capstan 131 that adjusts the tension of the rear side wire 11b is rotated in the state of the rear side wire 11b closer to the side of the wire recovery device 120 than the delivery capstan 46, and a plurality of cutting parts are formed between the lead-out side capstan 31 and the transport capstan 46. The front side wire 11a moving between them and the rear side wire 11b moving between the conveying capstan 46 and the recovery side capstan 131 are formed.

In addition, in the cutting method of cutting the workpiece 12 with the wire 11 according to the present embodiment, the wire 11 between the wire lead-out device 20 and the wire recovery device 120 is hung on the conveying capstan 46, and the conveying capstan 46 is rotated to make the The steel wire 11 moves, the tension of the front side steel wire 11a near the side of the steel wire lead-out device 20 is adjusted by the lead-out side winch 31 compared with the delivery winch 46, and the tension of the rear side steel wire 11b near the steel wire recovery device 120 side of the recovery side winch 131 is compared with the delivery winch 46. Tension is adjusted, through the front side steel wire 11a that moves between the lead-out side winch 31 and the delivery winch 46 under the state that the tension is adjusted, and the front side steel wire 11a that moves between the delivery winch 46 and the recovery side under the state that the tension is adjusted. The rear wire 11 b moving between the capstans 131 cuts the workpiece 12 .

One wire is folded back to form two, and when the workpiece is cut through the two wires, the resistance generated during the cutting process of the front wire that cut the workpiece before is applied to the rear side that cuts the workpiece later. Therefore, there is a concern that the tension of the front wire and the rear wire to be cut may be different. Also in the wire saw and the cutting method of cutting a workpiece with a wire according to this embodiment, one wire 11 is moved by the conveying capstan 46 .

However, in this embodiment, the tension of the front side wire 11a is adjusted so as to control the rotation of the lead-out side winch 31, and the tension of the rear side wire 11b is adjusted so as to control the rotation of the recovery side winch 131. Adjustment. Therefore, the tensions of the front wire 11a and the rear wire 11b can be individually adjusted. Thereby, the tension of the front wire 11 a and the rear wire 11 b that simultaneously cut the workpiece 12 can be made uniform, and the workpiece 12 can be cut more stably.

In addition, the wire saw 10 further includes a first load sensor 51 and a second load sensor 52 for detecting the tension of the front wire 11 a before and after cutting the workpiece 12 , and a second load sensor 52 for detecting the tension of the rear wire 11 b for cutting the workpiece 12 . The third load sensor 53, the fourth load sensor 54, and through the detection output of the first load sensor 51 and the second load sensor 52, the rotation of the lead-out side winch 31 is controlled, and the third load sensor 53, the fourth load sensor The detection output of 54 is a controller that controls the rotation of the recovery winch 131 .

The first load sensor 51 and the second load sensor 52 detect the tension of the front wire 11a before and after cutting the workpiece 12, and the third load sensor 53 and the fourth load sensor 54 detect the tension of the rear wire 11b before and after cutting the workpiece 12. Tension is checked. Therefore, the tensions of the front wire 11 a and the rear wire 11 b are adjusted so that the values of the first load sensor 51 and the third load sensor 53 are equal, and the values of the second load sensor 52 and the fourth load sensor 54 are also equal. , so that equalized cutting can be performed more reliably.

In addition, the wire saw 10 further includes a housing 41 that accommodates the workpiece 12 therein, and the conveying capstan 46 is preferably provided outside the housing 41 so as to be exposed. In addition, inside the housing 41 of the wire saw 10, it is further preferable to provide an elevator 42 on which the workpiece 12 is mounted and raised and lowered, a plurality of pulleys 43 arranged above the elevator 42 to pull the wire 11, and a plurality of pulleys 43 to move the wire 11 to a lower position. Part or all of the actuator 44 that moves.

The conveying winch 46 is provided outside the casing 41 so as to be exposed, so that the arrangement work of the wire 11 and the maintenance and inspection thereof are facilitated. In addition, by providing an actuator 44 for moving a plurality of pulleys 43 pulling the wire 11, it is possible to cut the workpiece 12 having a different size and shape at a desired position and shape.

Although the embodiment of the present invention has been described above, the above embodiment is merely a part of application examples of the present invention, and is not intended to limit the technical scope of the present invention to the specific configuration of the above embodiment.

In the above-described embodiment, the rotation speed of the reel 22, 122 is changed and adjusted by the rotation of the floating arms 27c, 127c of the tension device 27, 127, and the wire 11 is adjusted so that the amount of movement of the conveying capstan 46 becomes the same. The situation of adjusting the export amount and recovery amount of the export volume is explained.

In addition, the controller can also use the load sensor 29 for leading out the steel wire and the load sensor 129 for recovering the steel wire to detect the tension of the steel wire 11 erected between the position detection mechanism 26, 126 and the tension device 27, 127. The detection output is used to control a motor (not shown) that rotates the reels 22 and 122 on the lead-out side or the recovery side. The rotation speed of the reels 22 and 122 may be changed and adjusted to adjust the lead-out or recovery amount of the wire 11 in the same manner as the movement amount of the transport capstan 46 .

Claims (5)

1. A wire saw, characterized in that, possesses: A steel wire supply part (20), which leads out the steel wire (11); a steel wire recycling unit (120), which recovers the exported steel wire (11); a plurality of cutting parts (11a, 11b), which are formed by pulling the wire (11) between the wire supply part (20) and the wire recovery part (120), and cut the workpiece (12) ; a conveying capstan (46) that rotates with the wire (11) spanned between the wire supply part (20) and the wire recovery part (120) to move the wire (11) ; a lead-out side winch (31), which is installed on the wire supply part (20) and on which the front side wire (11a) on the side closer to the wire supply part (20) than the delivery winch (46) is erected; Rotate under state, thereby the tension force of described front side steel wire (11a) is adjusted; And A recovery side winch (131), which is installed in the wire recovery part (120) and rotates while the rear side wire (11b) on the side closer to the wire recovery part than the delivery winch (46) is erected , thereby adjusting the tension of the rear steel wire (11b), The plurality of cutting parts are formed by the front side wire (11a) moving between the lead-out side winch (31) and the delivery side winch (46) and between the delivery side winch (46) and the recovery side. Said rear wire (11b) moves between capstans (131) formed. 2. The wire saw according to claim 1, further comprising: A first load sensor (51) and a second load sensor (52), which detect the tension of the front steel wire (11a) before and after cutting off the workpiece (12); a third load sensor (53), a fourth load sensor (54), which detect the tension of the rear steel wire (11b) before and after cutting the workpiece (12); and a controller, which controls the rotation of the lead-out side winch (31) through the detection output of the first load sensor (51) and the second load sensor (52); through the third load sensor (51), The detection output of the fourth load sensor (54) controls the rotation of the recovery side winch (131). 3. Wire saw according to claim 1 or 2, characterized in that, further comprising a housing (41) for accommodating the workpiece (12) therein, The conveying winch (46) is arranged to be exposed outside the casing (41). 4. The wire saw of claim 3, wherein: Inside the housing (41) are provided with a lifter (42) for carrying the workpiece (12) and making it lift up and down, and a plurality of pulleys ( 43), and an actuator (44) that moves some or all of the plurality of pulleys (43). 5. A method for cutting workpieces by using steel wires, wherein the workpieces (12) are cut by the steel wires (11) drawn out from the steel wire supply part (20) and wound around the steel wire recovery parts (120), wherein characterized in that, The steel wire (11) between the steel wire supply part (20) and the steel wire recovery part (120) is erected on a conveying capstan (46), and the conveying capstan (46) is rotated, so that the Steel wire (11) moves, The tension of the front steel wire (11a) on the side near the steel wire supply part (20) of the delivery winch (46) is adjusted by the lead-out side winch (31), The tension of the rear steel wire (11b) on the side close to the steel wire recovery part (120) of the conveying winch (46) is adjusted by the recovery side winch (131), Through the front side steel wire (11a) moving between the lead-out side winch (31) and the delivery winch (46) under the state where the tension is adjusted and the state where the tension is adjusted, the The rear side wire (11b) moving between the conveying winch (46) and the recovery side winch (131) cuts the workpiece (12).