JP2006198680A - Cast-rolled material and production method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for efficiently producing a cast-rolled material, related to the cast-rolled material cut to the prescribed length and a production method therefor. <P>SOLUTION: The production method for the cast-rolled material is characterized in that the cast material is continuously cast then is rolled and further, the rolled material is successively cut to the prescribed length. Further, at least a part of the surface layer part on the cast material is removed by cutting off before being rolled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cast rolled material cut to a required length and a manufacturing method thereof.

  In the continuous casting and rolling method, it is common to perform rolling after continuous casting and coil the rolled material. The coiled rolled material is used to remove the segregation layer on the surface, carbides derived from lubricating oil used during casting, oxides such as additive elements, and fine cracks using a peeling die while uncoiling, and then re-coiling It is wound or cut to a standard length.

  However, these methods are very inefficient due to an increase in the number of steps that require switching of the coil winding reel.

  For coil winding, in order to smoothly switch the reel, the rotating plate of the wire take-up machine can be fitted with a ball at the tip of the locking claw that locks the starting end of the wire to prevent reel switching mistakes due to sticking of the rolled material Has been proposed (see Patent Document 1).

Regarding cutting, an aluminum alloy with good shear cutting ability has been proposed (see Patent Document 2).
JP-A-8-12199 JP 2004-143511 A

  However, the problem that the rolled material is not sufficiently fixed to the engaging claws when switching the coil winding reel is not solved. Moreover, the shear cutting property improvement by the alloy composition can be applied only to an alloy having a specific composition and is not versatile. In addition, even if reel switching and shear cutting were performed smoothly, the series of processes of coil winding after rolling, peeling while uncoiling, coil winding or cutting again was not changed, and production efficiency was sufficiently improved. It can not be said.

  In view of the above-described background art, the present invention provides a method for efficiently producing a cast and rolled material, and further implements the cast and rolled material produced by this method, the metal processed material subjected to secondary processing, and the production method. The purpose is to provide a manufacturing apparatus.

  The manufacturing method of the cast rolling material of this invention has the structure as described in following [1]-[7].

  [1] A method for producing a cast rolled material, comprising continuously casting a cast material, subsequently rolling the cast material, and continuously cutting the rolled material to a required length.

  [2] The method for producing a cast rolled material according to item 1, wherein at least a part of a surface layer portion of the cast material is excised before rolling.

  [3] The continuous casting is performed according to any one of the preceding items 1 and 2, wherein the continuous casting is performed by arranging a plurality of rotating mold members so as to surround a casting space and driving these rotating mold members in a casting direction. Manufacturing method of cast rolled material.

  [4] Cast rolling according to item 3 above, wherein a casting material is continuously cast with a difference in temperature between the plurality of rotary mold members, and surface layer part cutting is performed on a contact surface of the cast material with the high temperature side rotary mold member. A method of manufacturing the material.

  [5] The method for producing a cast rolled material according to any one of items 1 to 4, wherein the rolling material cutting means is synchronized with the movement of the rolled material, and the rolled material is cut while being moved.

  [6] The method for producing a cast and rolled material according to any one of items 1 to 5, wherein the cutting means is a shearing blade or a saw blade.

  [7] The method for producing a cast and rolled material according to any one of items 1 to 6, wherein the cast material is made of aluminum or an aluminum alloy.

  The cast and rolled material of the present invention has the configuration described in [8] below.

  [8] A cast and rolled material produced by the method described in any one of 1 to 7 above.

  The metal workpiece of the present invention has the configuration described in [9] and [10] below.

  [9] A metal processed material obtained by subjecting the cast rolled material described in the preceding item 8 to plastic working.

  [10] A metal processed material, wherein the cast rolled material described in the preceding item 8 is cut.

  The apparatus for producing a cast and rolled material of the present invention has the configuration described in [11] and [12] below.

  [11] A continuous casting part that continuously casts a cast material, a rolling part that is arranged downstream of the continuous casting part and continuously rolls the cast material cast, and a downstream part of the rolling part, An apparatus for producing a cast rolled material, comprising: a cutting unit that continuously cuts the rolled material into a required length.

  [12] The apparatus for producing a cast rolled material as recited in the aforementioned Item 11, which has a cut portion disposed between the continuous cast portion and the rolled portion and cutting and removing at least a part of a surface layer portion of the cast material.

  According to the invention of [1], it is possible to efficiently produce a fixed cast rolled material by cutting following rolling. Further, since the cutting is performed before the temperature of the rolled material is lowered, the cutting resistance is small, and the life of the cutting blade is improved. Further, since the rolled material is not wound around the coil, it cannot be wound.

  According to the invention of [2], since surface quality defects are removed at the stage of the cast material, there is no carry over to these rolled materials, and a high-quality cast and rolled material can be manufactured.

  According to the invention of [3], continuous casting can be performed smoothly.

  According to the invention of [4], it is possible to perform continuous casting by directional solidification, manufacture a cast material whose final solidified portion is close to the high temperature side rotary mold member, and further cut the final solidified portion of the cast material.

  According to the invention of [5], the rolled material can be cut without delay.

  According to the invention of [6], cutting can be performed smoothly.

  According to the invention of [7], a cast rolled material made of aluminum or an aluminum alloy can be efficiently produced.

  The cast and rolled material according to the invention of [8] is of high quality without being rolled up or further carrying over surface quality defects.

  The metal processed material according to the invention of [9] is of high quality because it is obtained by subjecting the cast rolled material of the present invention to plastic working.

  The metal processed material according to the invention of [10] is a high quality product because the cast rolled material of the present invention is cut.

  According to the apparatus for producing a cast and rolled material according to the invention of [11], the method for producing a cast and rolled material of the present invention can be implemented to efficiently produce a fixed-size cast and rolled material.

  According to the invention of [12], it is possible to produce a high-quality cast and rolled material without carryover of surface quality defects.

  In FIG. 1, the structure of the manufacturing apparatus (1) of the cast rolling material which implements this invention is shown. The manufacturing apparatus (1) is configured by arranging a continuous casting part (10), a cutting part (20), a rolling part (50), and a cutting part (60) in series. And continuous casting of the cast material (S1) in the continuous casting part (10), continuous layer cutting of the cast material (S1) in the cut part (20), and rolling of the cast material (S1) in the rolling part (50) The production of the regular rolled material (S3) is continuously performed by forming the material (S2) and cutting the continuous rolled material (S2) in the cutting part (60).

  The continuous casting part (10) includes a casting wheel (11) and a continuous belt (12) as rotary mold members that form a casting space. The casting wheel (11) has a concave groove (13) on its outer peripheral surface, and can be cooled by supplying cooling water from a nozzle (not shown) disposed inside. On the other hand, the continuous belt (12) is an annular endless belt hung on the casting wheel (11) and the tension adjusting wheel (14), and as shown in FIG. (13) is closed to form a casting space (17) having a pentagonal cross section. The continuous belt (12) can be cooled by supplying cooling water from the outside, or can be heated by arranging a heater on the outside. In FIG. 1, (15) is a pinch roll for bringing the continuous belt (12) into close contact with the casting wheel (11), and (16) is for supplying molten metal (M) to the casting space (17). It is a tundish.

  In addition, the shape of the concave groove (13) of the casting wheel (11), in other words, the shape of the casting space (17) is not limited to the pentagonal cross section shown in the illustrated example, and the casting material (S1) is not limited. Any shape that can be easily taken out can be used. An example of the other concave groove is an inverted trapezoid.

  In the continuous casting part (10), the molten metal (M) supplied from the tundish (16) to the casting space (17) is cooled by the casting wheel (11) and the continuous belt (12). As the casting wheel (11) and the continuous belt (12) are driven to rotate, the cast material (S1) is continuously formed while solidifying from the contact surface to the inside.

  The cut part (20) includes a cutting blade for cutting the surface layer part of the cast material (S1). The surface layer is not necessarily cut off on the entire peripheral surface of the cast material (S1), and there is a segregation layer, foreign matter, fine cracks (hereinafter collectively referred to as “surface quality defects”), and casting. What is necessary is to perform only with respect to the surface or part which produces a problem if it carries over to a rolling material.

  For example, in the cast material (S1) manufactured using the casting wheel (11) and the continuous belt (12) described above as a rotating mold member, a segregation layer is likely to be generated on the contact surface with the continuous belt (12). As shown, it is preferable to cut away the portion (31) in contact with the continuous belt (12). Since the segregation layer generated on the surface has a high alloy component concentration, cracking is likely to occur by subsequent rolling. If cracks stop in the segregation layer, they can be removed by peeling the cast rolled material, but if the cracks propagate to the inside of the cast rolled material, they cannot be removed by peeling, and there is no product value. . Therefore, if the segregation layer is removed before rolling, generation of cracks due to rolling can be prevented. Moreover, the lifetime reduction of the cutting blade which arises by cutting a rolling material with a segregation layer can also be prevented, and the quality of a cut surface can also be improved.

  Further, a casting method in which a temperature difference is provided in the rotary mold member to make a difference in the solidification speed, and the final solidified portion is brought close to the surface from the center (hereinafter referred to as “directional solidification” or “continuous casting method by directional solidification”). ) In the case of the continuous casting part (10), when the casting wheel (11) is cooled while the continuous belt (12) is heated and the cast material (S1) is continuously cast by directional solidification, the continuous belt (12) The vicinity of the contact portion is the final solidified portion. In general, casting defects such as shrinkage cavities and cracks are likely to occur in the final solidified portion, but when there are large casting defects, they may remain as defects without being crimped even when rolled. In such a case, a sound rolled material having no defects can be produced by cutting the final solidified portion on the continuous belt (12) side before rolling. In the directional solidification, the heating temperature of the continuous belt is preferably [liquidus temperature of cast metal × 0.35] to [liquidus temperature].

  Moreover, even if the casting material has fine cracks and foreign matters on its surface, it can be prevented from spreading and carrying over foreign matters by removing it before rolling. When cutting the surface layer portion, the shape of the cutting blade is not limited at all, and it may be a rotary blade or a fixed blade, and the number of cutting blades is not limited.

  As a cutting blade, what is shown to FIG. 4A-FIG. 4D can be illustrated. FIG. 4A shows a full-back cutter (21) in which a plurality of blades (21a) project from the surface of the rotating disk. FIG. 4B shows a cylindrical cutter (22) in which a plurality of cutting blades (22a) are protruded from the peripheral surface of the cylindrical rotating disk. FIG. 4C shows a cylindrical cutter (23) having cutting blades (23a) and (23b) on the peripheral surface of the same type as FIG. 4B, but by providing a cutting blade (23b) protruding on a part of the peripheral surface. In addition to cutting the entire surface, only a part of the surface can be cut deeply (see FIG. 3B). FIG. 4D shows a wedge-shaped fixed blade (24). The fixed blade (24) is pressed against the cast material (S1), and the surface layer portion is scraped off as the cast material (S1) moves. In any case, support rolls (40), (40), and (40) are disposed on the opposing surfaces and both side surfaces of the cutting blades (21), (22), (23), and (24), and support rolls ( 41) (41) is arranged and supported by the cast material (S1) so as to be movable. Thereby, continuous cutting is possible even if cutting resistance arises.

  As the material of the cutting blades (21), (22), (23), and (24), a so-called super hard material in which a binder is added to high-speed steel or WC can be recommended. It is also effective to perform a surface treatment such as TiN, TiC, TiAlN, CrN, or DLC. These materials and surface treatments are excellent in wear resistance and have an effect of suppressing adhesion of the work material.

  Also, as shown in the example, the cast material (S1) is sandwiched between support rolls (40), (41), etc., so that the surface layer portion can be moved in the feed direction while being constrained in other directions. It is desirable to remove. In this way, the bending of the cast material (S1) is corrected, and a stable surface layer removal amount can be secured.

  According to the cutting blades (21), (22), (23), and (24) described above, as shown in FIGS. 3A and 3B, the surface layer portion on the continuous belt (12) side of the cast material (S1) has a predetermined thickness. Now it can be excised. In addition, in each cutting blade (21) (22) (23) (24), it is possible to cut the entire surface or only a part of the surface according to the disc diameter, cylindrical length, blade width, etc. It is. Further, the cutting thickness can be arbitrarily set according to the pressing depth of the cutting blades (21), (22), (23), and (24). In the cylindrical cutters (21), (22), and (23) shown in FIGS. 4A to 4C, the cutting depth is set by the amount of protrusion of the cutting blades (21a), (22a), (23a), and (23b) from the board surface. Cutting depth is set by adjusting the mounting position (projection amount) of the blade (21a) (22a) (23a) (23b) or by selecting the size of the cutting blade (21a) (22a) (23a) (23b) It has been. Moreover, when cutting with a rotary blade, it is desirable that the cutting amount per blade is about 0.3 to 0.6 mm. With this amount of cutting, the load on the cutting blade does not become excessive, and the chips become an appropriate size and are easy to collect. In other words, when the swarf is too small, the swarf is scattered around due to the air flow generated by the rotary blade or the like, making it difficult to collect.

  4A to 4D are examples of excision of only one surface of the cast material (S1), but plural surfaces can be excised by arranging cutting blades on plural surfaces. FIG. 3C shows an example in which the entire peripheral surface of the cast material (S1) is cut out. Further, the cut thickness does not need to be constant within the surface, and a part of the surface can be deeply cut as shown in FIGS. 3B and 3D. In the directional solidification described above, since the final solidified portion is formed in the central portion on the continuous belt (12) side, as shown in FIG. 3B or 3D, only the surface quality defect portion is removed by deeply cutting that portion. Can be excised. Further, the entire peripheral surface of the cast material (S1) can be excised and only one surface can be excised thickly. 3B to 3D, (32), (33), and (34) are excised portions.

  In addition, one surface can be cut with a plurality of cutting blades. For example, when increasing the cutting thickness, if two cutting blades are arranged along the moving direction of the cast material and cutting is performed in two stages, the cutting load can be reduced and the cutting blade life can be improved. . Further, after cutting the entire surface to a certain thickness with the first cutting blade, a part of the surface can be deeply cut with the second cutting blade. Further, it is optional to combine a rotary blade and a fixed blade.

  The cut thickness may be arbitrarily set according to the thickness of the surface quality defect. When removing the foreign material adhering to the surface, 0.5 to 3 mm is preferable, and when removing the segregation layer, 0.5 to 7 mm is preferable.

  Further, a lubricant may be used as appropriate in order to reduce the cutting resistance at the time of excision. The method of applying the lubricant is not limited in any way, such as dripping or spraying, but if a large amount of lubricant is used, the casting material temperature may be excessively lowered, so that the lubricant can be applied uniformly with the minimum necessary lubricant. The method of spraying can be recommended. In addition, any type of lubricant can be used, regardless of whether it is water-based or oil-based.Emulsion-type lubricants can be used because they can be cooled efficiently by the heat of vaporization when water is evaporated even when the cutting edge is hot. Can be recommended.

  By the way, when the casting material temperature at the time of cutting is high, the surface of the casting material may be locally melted by frictional heat with the cutting blade. On the other hand, as described above, it is possible to lower the temperature of the cast material by applying the lubricant, but when the lubricant cannot be sufficiently lowered by applying the lubricant, the cast material may be cooled at the stage before cutting. preferable. The casting material temperature at the time of excision is preferably [material solidus temperature × 0.3] to [material solidus temperature × 0.95]. This is because if the temperature is too low, the cutting resistance increases and the load increases, and if it is too high, it may melt due to frictional heat during cutting. The casting material temperature at the time of excision is preferably [material solidus temperature x 0.5] to [material solidus temperature x 0.8]. Examples of the cooling method of the cast material include water cooling such as a method of passing cooling water in a cooling tank and a method of bathing cooling water. Since it is cooling of the casting material which is moving, in any case, the temperature can be adjusted by the contact time with the cooling water and the amount of water. For example, a water tank or a shower room is arranged between the continuous casting part (10) and the excision part (20), and the amount of water in the case of a shower room is adjusted by adjusting the time and temperature of the casting material (S1) passing through them. By adjusting, the cast material (S1) can be cooled to a temperature suitable for cutting.

  The configuration of the continuous casting part (10) is not limited in any way, but in consideration of continuously performing casting, surface layer cutting, and rolling, a plurality of rotary mold members are arranged to face each other around the casting space, and these rotations are rotated. Casting is preferably performed by driving the mold member in the casting direction. In addition, since the present invention cuts out surface quality defects existing in the surface layer portion before rolling, a casting in which the final solidified portion is formed near the surface like the cast material cast by directional solidification described above. When applied to a material, a remarkable effect can be achieved. The plurality of rotary mold members are advantageous for performing continuous casting by directional solidification in which one rotary mold member is cooled while the other rotary mold member is heated, and can be recommended as a continuous casting part in the present invention. Examples of the rotary mold member include a pair of casting rolls in addition to the casting wheel (11) and the continuous belt (12) shown in the drawing.

  The configuration of the rolling section (50) is not limited at all, and has, for example, one set or a plurality of sets of rolling rolls (51). FIG. 6 shows a rolling example in which rolling rolls are arranged in three directions and the cast material (S1) whose surface layer portion is cut is rolled in multiple stages to produce a continuous rolled material (S2) having a circular cross section. . In FIG. 1, only two-direction rolls are shown. Moreover, a rolling roll is not limited to 2 directions or 3 directions, What combined the roll of 4 directions or more may be used.

  In the rolling part (50), since the rolling is performed on the cast material (S1) from which the surface quality defect of the surface layer part has already been cut, the surface quality defect may be carried over to the continuous rolled material (S2). The continuous rolled material (S2) with good quality is manufactured. Furthermore, the continuous rolled material (S2) moves to the cutting part (60). Since the surface layer part is cut while the cast material (S1) is moved, there is no production time extension due to the insertion of the cutting process, and the cast material (S1) is rolled without any delay. Sent to 50).

  In the cutting part (60), the continuously rolled material (S2) that is continuously rolled is cut into a fixed length rolled material (S3) having a required length. However, the rolling speed may be adjusted by adjusting the rolling speed according to the casting speed or by roll sliding during rolling. Since the speed of the continuous rolled material (S2) is not necessarily constant, cutting is performed at regular time intervals. Then, the cutting length may vary. Therefore, it is preferable to set the cutting timing while always measuring the actual feed amount of the continuous rolled material (S2) in order to cut it to the expected length accurately. The length measuring means is not limited in any way, but can be exemplified by a length measuring roll (61) for measuring the feed amount by bringing a roll with an encoder into contact with the continuously rolled material (S2), or a non-contact type laser length measuring device. The length measuring roll (61) can be recommended because it can measure the length.

  The traveling speed of the carriage at the time of cutting is preferably the same speed as the rolling material speed before cutting, but if the rolling material speed is +/− 10%, it can be cut without any problem, and the rolling material speed is +/− 5%. It is still preferable if it exists. The traveling speed of the continuous rolled material (S2) can be measured by the length measuring means described above. In order to cut the continuous rolled material (S2) that travels, for example, as shown in FIG. 5, a cutting means may be attached to the carriage and run in synchronization with the movement of the continuous rolled material (S2). S2) can be cut without delay without reducing the traveling speed. In the illustrated example, the continuous rolled material (S2) is sandwiched from above and below by the restraining jigs (62a) and (62b), and a roller is attached to the lower restraining jig (62b) so that it can run. By cutting the attached shear (63), cutting by shearing is performed. Further, by constraining the continuous rolled material (S2), the rolled material can be cut without causing problems such as bending. The driving method of the traveling unit is not limited, and examples thereof include an air cylinder, a hydraulic cylinder, an electric motor and a gear, an electric motor and a ball screw. In these driving devices, the traveling speed is controlled based on the measurement result (the traveling speed of the rolled material) by the length measuring means.

Subsequent to the casting process, the rolling process for reducing the diameter of the cast material (S1) is continuously performed without cutting the member. As a result, the moving speed of the continuous rolled material (S2) The speed of the cut product has a width depending on various conditions and the like, but is higher than the moving speed of the cast material, for example, 5 to 300 m / min. Specifically, using a cast wheel (11) having a diameter of 1400 mm, 2.0 r. p. In the case of rolling to a diameter of 15 mm following the casting process of casting a cast material (S1) having a cross-sectional area of 2200 mm ² at a casting speed of m, the speed of the continuous rolled material (S2) is about 109 m / min. Similarly, when rolling to a diameter of 9.5 mm, the speed of the continuously rolled material (S2) is about 273 m / min. Even in such a continuously rolled material (S2) that travels at a high speed, the cutting length and the accuracy of the cut surface can be stabilized by performing the cutting control based on the actual measurement of the rolled material feed by the length measuring means.

  An example of control of the operation of the cutting carriage and cutting timing will be described.

  (i) The amount of movement of the continuous rolled material (S2) by the movement detector (64) installed in front of the cutting part (60) (for example, a length measuring means for detecting the amount of movement, a length measuring device, a length measuring roller, etc.) Measure. The movement detector (64) or the control device (65) calculates the movement speed from the detected movement amount. You may use what can detect a moving speed directly with a movement detector.

  (ii) The control device (65) sets the cutting timing based on the measurement result of the movement detector and the cutting length preset on the control device (65).

  (iii) The carriage starts running and accelerates until it reaches the same speed as the continuous rolled material (S2) so as to cut at the cutting timing set in (ii).

  (iv) The continuous rolled material (S2) is clamped and cut at the set cutting timing.

  (v) At the end of cutting, the continuously rolled material (S2) is unclamped, and then the carriage is decelerated and brakes are applied as necessary.

  (vi) The carriage travels in the direction opposite to the rolling material traveling direction in order to return to the initial position for the next cutting.

  (vii) Return to (i) and repeat.

  Here, the cutting timing and carriage movement set in the control device (65) are set as follows (a) to (f).

  (a) The accelerating capacity and acceleration curve of the bogie are investigated in advance, and the data is input to the control device (65).

  (b) Set the cutting position to execute the cutting operation.

  (c) The time required for the carriage to move to the cutting position is calculated from the data of (a) and (b).

  (d) On the other hand, when the cut portion of the rolled material reaches the cutting position is calculated from the length measurement result and the speed calculation (or measurement) result of the continuous rolled material (S2).

  (e) The bogie movement start time is set by calculating back the timing so that the bogie reaches the cutting position at the cutting time calculated in (d).

  (f) If necessary, adjust the cutting position of (b) and the standby position of the carriage so as to meet the above cycle.

  In addition, control to the cutting carriage as described in (g) to (h) below may be performed.

  (g) The speed of the carriage is controlled by monitoring whether or not the speed is the same as that of the continuously rolled material (S2). For example, a speed detector is mounted on the carriage, the speed of the continuously rolled material (S2) is detected and monitored, and the carriage speed is controlled so that the relative speed becomes zero. Alternatively, a detector for separately detecting the speed of the continuous rolled material (S2) and the carriage is provided, and the speed of the carriage is controlled so that the difference is zero by detecting and monitoring each speed.

  (h) With the speed controlled in this way, the cutting start position is found by tracing as in the following (h1), (h2), (h3), and (h4), clamped and cut.

  (h1) At the point of time when the cutting position corresponding to the cutting length is detected by the movement detector, measurement of the speed of the continuous rolled material (S2) is started from that point in time (for example, a timer is provided in the control device) ) Calculate the movement position of the cutting point from the time and speed and trace.

  (h2) Alternatively, when the cutting position is detected by the movement detector, the surface of the rolled material is marked by a marking device, and the moving position of the cutting position is monitored by mounting a detector for detecting the mark on the cutting carriage.

  (h3) On the other hand, when the cutting point is detected by the movement detector, the trolley is started in consideration of the stand-by position and acceleration capability of the trolley, and the trolley and the continuous rolled material ( The carriage is accelerated so that the speed of S2) is the same.

  (h4) Clamping is started at the time when the speed becomes the same and the cutting portion is caught (cutting timing), and cutting is started.

  The cutting means is not limited, and examples include cutting by shearing with a shear or the like, cutting with a saw blade, and the like.

  The material of these cutting means is not particularly limited, but as the shearing blade, it is possible to recommend a high-speed steel or a cemented carbide material, or a material obtained by subjecting them to a surface treatment such as TiN, TiC, TiAlN, CrN, or DLC. These materials and surface treatments are excellent in wear resistance, and the material to be cut is less likely to adhere and can have a long life.

  Although the outer diameter and material of the saw blade are not limited, a tip saw in which a carbide tip is brazed to the blade tip portion can be recommended. With these saw blades, the cutting edge portion is less likely to wear. Moreover, it is possible to recommend high-speed steel or cemented carbide, or those obtained by subjecting them to surface treatment such as TiN, TiC, TiAlN, CrN, or DLC. These materials and surface treatments are excellent in wear resistance, and the material to be cut is less likely to adhere and can have a long life. The outer diameter of the saw blade may be appropriately selected according to the diameter of the continuous rolled material (S2). For example, a continuous rolled material (S2) having a diameter of 100 mm or less can be recommended having a diameter of 200 to 610 mm. When the diameter of the saw blade is reduced, the outer peripheral length is shortened, the number of blades is reduced, and the number of times of cutting of one blade is increased, so that the life of the saw blade is shortened. On the other hand, when the diameter is increased, the rigidity of the saw blade is lowered, so that the accuracy of the cut surface is deteriorated. Further, the number of rotations of the saw blade is 1000-3500 rpm depending on the diameter of the saw blade. p. m can be recommended. This is because when the rotational speed is excessively high, the saw blade itself resonates and the cutting surface accuracy may be deteriorated, and when the rotational speed is excessively low, the cutting time becomes long.

  Although the temperature of the continuous rolled material (S2) at the time of cutting is not particularly limited, normal temperature to 300 ° C is preferable, and 100 ° C to 300 ° C is particularly preferable. The cutting resistance decreases as the temperature increases, but if it is 100 ° C. or higher, the cutting resistance is remarkably reduced and the life of the cutting blade can be improved. Moreover, if it is 300 degrees C or less, at the time of carrying out the cut rolled material (S3), it will be hard to get a damage | wound. Such temperature adjustment can be performed by adjusting the supply amount of lubricating oil used in the rolling section (50), for example, emulsion type lubricating oil, or by cooling after rolling. Examples of the cooling method after rolling include a method in which the continuous rolled material (S2) is immersed or bathed in water, oil, or an emulsion type lubricating oil used in a rolling part.

  The cut regular rolled material (S3) is discharged from the manufacturing apparatus (1) by the unloading apparatus, but the unloading method is not limited at all. Examples of the carrying-out method include a method in which the cut rolled rolled material (S3) is dropped onto the conveyor and carried out, or dropped onto the slope and rolled out. It is also preferable to prevent contact between the regular rolled materials (S3) by using a partition conveyor so that the surface is not damaged. Moreover, the regular rolling material (S3) can be stored just under a cutting part (60), and it can also carry out collectively.

  Moreover, a support means can be provided on the cut product (fixed rolled material (S3)) side of the continuous rolled material (S2). The support means only needs to be able to stably support at least the article to be cut that moves at high speed at the time of cutting, for example, a cutting carriage provided with a support clamp, or the cutting carriage and the support clamping carriage can be separated. And so on. The support means, after cutting, may be transported as it is in some cases, then releases the cut product and delivers the cut product to the next step. The next process can be a conveyor, a loading table, an articulated robot, or the like.

  As described above, according to the method of the present invention, the production efficiency is high because cutting is performed following rolling. Further, since the continuous rolled material (S2) is not wound around the coil, the cut regular rolled material (S3) cannot be wound, and there is no occurrence of trouble at the time of reel switching. Moreover, since cutting is performed before the temperature of the continuous rolled material (S2) is lowered, the cutting resistance is small. For this reason, there is little consumption and damage of a cutting blade, and a cutting blade life improves. Furthermore, a cast rolled material with good surface quality can be manufactured by adding a process of cutting the surface layer at the stage of the cast material (S1).

  In addition, the manufacturing method of the cast-rolled material of this invention can be rolled and cut after continuous casting, or after removing the surface layer after continuous casting. The metal material manufacturing apparatus of the present invention has a configuration composed of a continuous casting portion, a rolling portion, and a cutting portion, or a configuration composed of a continuous casting portion, a cutting portion, a rolling portion, and a cutting portion. Therefore, the cast rolled material of the present invention is a material obtained by rolling a cut cast rolled material, a cast material having a cut off surface layer portion, and cutting the cut rolled material, and further adding secondary processing to the cast rolled material. is there.

  The method for producing a cast rolled material of the present invention can be applied to any metal, but can be recommended for continuous casting of aluminum or aluminum alloy, copper or copper alloy, and particularly recommended for the production of cast rolled material of aluminum or aluminum alloy. Examples of aluminum or aluminum alloy include pure Al, Al—Cu, Al—Si, Al—Mg, Al—Mg—Si, and Al—Zn—Mg alloys. In particular, since alloys other than pure aluminum easily form a segregation layer on the surface, the effect of applying the present invention in which a surface layer part cutting step is added to a cast material is significant.

  The metal workpiece of the present invention is produced by subjecting a cast rolled material cut to a required length according to the present invention to plastic processing or cutting, and is not wound because it is not wound on a coil. is there. In particular, the cast rolled material from which the surface layer portion of the cast material has been cut has no carryover of surface quality defects and has high quality. The plastic working method and the cutting method are not limited at all. Examples of the plastic working method include rolling, extrusion, drawing, forging, bending, and pressing. Examples of the cutting method include cutting with a lathe, a milling machine, a drilling machine, and the like. The product shape is not limited.

Using the cast rolled material production apparatus (1) shown in FIG. 1, a production test of the cast rolled material cut to a regular size was performed.
[Example 1]
In this example, continuous casting, rolling, and cutting were continuously performed using the continuous casting part (10), the rolling part (50), and the cutting part (60) in the illustrated apparatus configuration.

  As casting material (M), Si: 0.6 mass%, Fe: 0.2 mass%, Cu: 0.32 mass%, Mg: 1.0 mass%, Cr: 0.2 mass%, A JIS A6061 alloy (solidus temperature: 582 ° C.) composed of the balance Al and inevitable impurities was used.

In the continuous casting part (10), a casting wheel (11) having a diameter of 1400 mm, a concave groove having a pentagonal cross section (see FIG. 2) and a cross sectional area of 2200 mm ² is used. Cooling water was supplied to the cooling belt, and cooling water was supplied from the outside of the continuous belt (12). The casting wheel (11) is rotated at a rotational speed of 1.8 r. p. The cast material (S1) was continuously cast by driving at m.

  Next, the cast material (S1) was rolled into a continuous round bar (S2) having a diameter of 15 mm in the rolling part (50). At this time, the speed of the continuous round bar (S2) was 98 m / min.

  In the cutting part (60) of the next process, as shown in FIG. 5, the continuous round bar (S2) is restrained by the upper and lower restraining jigs (62a) and (62b), and the upper restraining jig (62a) is not shown. A shear (63) connected to the tip of the cylinder was attached. Then, while moving the restraining jigs (62a) and (62b) at the same speed as the continuous round bar (S2), the shear (63) was lowered and cut into a 4 m long round bar (S3).

Since the continuous round bar (S2) temperature at the time of cutting described above was 200 ° C. and the cutting resistance was smaller than that during cold, the shear life could be improved by about 20%.
[Example 2]
In this example, using the continuous casting part (10), the cutting part (20), the rolling part (50), the cutting part (60) in the illustrated apparatus configuration, continuous casting, surface layer part cutting, rolling The cutting was performed continuously.

  As a casting material (M), Si: 11.0% by mass, Fe: 0.2% by mass, Cu: 4.2% by mass, Mg: 0.6% by mass, the balance being aluminum and inevitable impurities An alloy (solidus temperature: 510 ° C.) was used.

  In the continuous casting part (10), a casting wheel (11) of the same type as in Example 1 was used, and 1.5r. p. rotated at m. In addition, while cooling water is supplied to the inside of the casting wheel (11) for cooling, the belt temperature immediately before contacting the molten metal (M) by heating the outside of the continuous belt (12) with a burner (not shown) is set to 500. It set so that it might become ° C and performed the continuous casting by directional solidification. By this directional solidification, a segregation layer was formed on the belt contact surface, and the final solidified portion became a cast material (S1) close to the belt side, and a casting defect such as a shrinkage nest occurred in the final solidified portion. Further, the temperature of the cast material (S1) immediately before being introduced into the cut portion (20) in the next step was 450 ° C.

  In the cut portion (20), as shown in FIG. 4C, a cylindrical cutter (23) having a convex blade in the central portion is used, and the belt contact surface of the cast material (S1) is sprayed while spraying the solubilized oil. Excision was performed. As shown in FIG. 3B, the surface layer portion (32) having a thickness (T1): 1 mm at both ends and a thickness (T2): 3 mm at the center portion was cut off. Further, at the time of cutting, the non-cut surface of the cast material (S1) is supported by the support roll (40), and the support roll (41) is also arranged before and after the cylindrical cutter (23) to cast the cast material ( S1) was supported from above and below. Further, the casting material (S1) was cooled by supplying cooling water to the shaft portions of the support rolls (40) and (41). By this cutting, the segregation layer and the final solidified portion formed on the belt contact surface and the vicinity thereof were cut, and a sound casting material (S1) having no defect was obtained.

  Next, the cast material (S1) was rolled into a continuous round bar (S2) having a diameter of 30 mm in the rolling part (50). At this time, the speed of the continuous round bar (S2) was 19 m / min.

  In the cutting part (60) in the next process, a circular saw is attached to the same type of restraining jigs (62a) (62b) as in Example 1 and is run at the same speed as the continuous round bar (S2). Cut into a round bar (S3). The manufactured regular round bar (S3) was healthy without segregation layers or casting defects generated during casting. Moreover, the continuous round bar (S2) temperature at the time of a cutting | disconnection was 200 degreeC, cutting resistance was reduced rather than the time of cold, and the lifetime of the circular saw improved.

  The present invention continuously performs cast rolling and cutting, and uses the cut cast rolled material as it is, and also uses it for the production of a metal cast rolled material for secondary processing such as plastic working and cutting. it can.

It is a schematic diagram which shows the structure of the manufacturing apparatus which enforces the manufacturing method of the cast rolling material concerning this invention. In the manufacturing apparatus of FIG. 1, it is sectional drawing of a rotation mold member. It is sectional drawing which shows a casting material and a cutting part. It is sectional drawing which shows a casting material and a cutting part. It is sectional drawing which shows casting and a cutting part. It is sectional drawing which shows casting and a cutting part. It is a side view which shows an example of a cutting blade typically. It is a side view which shows the other example of a cutting blade typically. It is the front which shows other examples of a cutting blade typically It is a side view which shows the other example of a cutting blade typically. It is a schematic diagram which shows the structure of a cutting part. It is sectional drawing which shows the process in which a continuous casting material is rolled.

Explanation of symbols

1 ... Cast rolling material manufacturing equipment
10 ... Continuous casting part
11 ... Casting wheel (rotary mold member)
12 ... Continuous belt (rotary mold member, high temperature side rotational mold member)
20 ... Resection
21,22,23,24 ... Cutting blade
31,32,33,347 ... Resection
50 ... Rolling part
60 ... Cutting part
61… Measurement roll
63 ... Shear (cutting means)
S1 ... cast material S2 ... continuously rolled material (rolled material, continuous round bar)
S3 ... Regular rolled material (cast rolled material, regular round bar)

Claims (12)

  A method for producing a cast rolled material, comprising continuously casting a cast material, subsequently rolling the cast material, and continuously cutting the rolled material to a required length.   The method for producing a cast rolled material according to claim 1, wherein at least a part of a surface layer portion of the cast material is cut before rolling.   3. The cast rolling according to claim 1, wherein the continuous casting is performed by arranging a plurality of rotary mold members so as to face each other around a casting space, and driving these rotary mold members in a casting direction. 4. A method of manufacturing the material.   The cast rolled material according to claim 3, wherein the cast material is continuously cast by providing a difference in temperature between the plurality of rotary mold members, and the surface layer portion is cut at a contact surface of the cast material with the high temperature side rotary mold member. Production method.   The method for producing a cast rolled material according to any one of claims 1 to 4, wherein the cutting means for the rolled material is synchronized with the movement of the rolled material, and the rolled material is cut while being moved.   The said cutting means is a shear blade or a saw blade, The manufacturing method of the cast rolling material of any one of Claims 1-5.   The said cast material consists of aluminum or an aluminum alloy, The manufacturing method of the cast rolling material of any one of Claims 1-6.   A cast-rolled material produced by the method according to claim 1.   A metal workpiece, wherein the cast and rolled material according to claim 8 is subjected to plastic working.   A metal workpiece, wherein the cast and rolled material according to claim 8 is cut.   A continuous casting part that continuously casts the cast material, a rolling part that is arranged downstream of the continuous casting part and continuously rolls the cast material cast, and a rear part of the rolling part that is placed and rolled. An apparatus for producing a cast rolled material, comprising: a cutting unit that continuously cuts the rolled material into a required length. The apparatus for producing a cast rolled material according to claim 11, further comprising a cut portion that is disposed between the continuous cast portion and the rolled portion and cuts and removes at least a part of a surface layer portion of the cast material.

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