JP2012139780A - Apparatus and method of cutting workpiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece cutting apparatus and a method of cutting a workpiece where a behavior of a wire is stabilized without using an adhesive, the possibility of wire breakage is reduced, and the cutting accuracy of the workpiece is improved.SOLUTION: The workpiece cutting apparatus includes: a workpiece cutting part having a plurality of wires for simultaneously cutting a cluster of workpieces comprising a plurality of blockish workpieces stacked with their end surfaces pushed against one another into a plurality of flaky workpieces; a workpiece storage part in which the workpieces are carried and accommodated; a push-out means for pushing out the workpiece accommodated in the workpiece storage part in a cutting direction toward the workpiece cutting part fixedly positioned; and a drop height regulating board on which the flaky workpiece is mounted for controlling the drop height of the flaky workpiece.

Description

  The present invention relates to a workpiece cutting apparatus and a workpiece cutting method for simultaneously cutting a workpiece to be cut into a plurality of piece-like workpieces using a multi-wire workpiece cutting section.

  Conventionally, a plurality of pieces are simultaneously formed by using a multi-wire work cutting unit in which fine wires are arranged in a multi-row state at a constant pitch on a work made of a hard and brittle material such as a semiconductor material, a glass material, ceramics, and a magnetic material. There is a multi-wire saw that cuts into a workpiece.

  For example, a conventional multi-wire saw is bonded to a base such as a glass plate while positioning the workpiece using two adjacent orthogonal reference plates for setting a plurality of workpieces to be cut simultaneously on the wire saw. I am trying to paste it with an agent. And the workpiece fixed on the glass plate is set with respect to the multi-wire saw, and the glass plate side is moved upwardly toward the multi-wire saw side, so that the workpiece is brought together with each wire of the multi-wire saw at an equal pitch arrangement with each glass plate. It is made to cut | disconnect (for example, refer patent document 1).

  In the apparatus of Patent Document 1, even when the work is fixed while positioning using the positioning reference plate, the work fixing position is inclined or shifted depending on the amount of adhesive applied or the situation during curing. . As a result, the cutting accuracy decreases when cutting with a multi-wire saw. In particular, the cutting position accuracy cannot be obtained at both ends of the joint portion between the workpieces. For this reason, the piece-like workpieces at both ends are discarded as defective products, and the workpiece material is wasted. Alternatively, the flaky workpieces at both ends may be used as a recycled material, but the flaky workpieces at both ends are returned to the raw material, which is not an efficient reuse. Further, since an adhesive is used for fixing the workpiece, an adhesive process before cutting and a peeling process after cutting are inevitably required. The bonding work time and adhesive curing time in the bonding process take a great deal of time, for example, 6 hours, and the sorting work time and peeling time in the peeling process, for example, takes about 2 hours. Yes, it is inefficient and wastes process and time. Furthermore, since the apparatus of Patent Document 1 also cuts sub-members such as an adhesive and a glass plate, these cutting wastes are used for the surface properties of the flaky workpiece (surface smoothness, surface resistance, plating film-forming properties). ) May worsen.

  Therefore, it is desired to improve the cutting accuracy by positioning and fixing the workpiece without using an adhesive. For example, Patent Document 2 describes a workpiece cutting device that does not require an adhesion process or a peeling process.

JP-A-10-128649 Japanese Patent No. 4355029

  In FIG. 2 of Patent Document 2, it is possible to down-cut by arranging a wire cutting portion on the lower side of the clamping reference plate, and cutting the workpiece by pushing it toward the lower wire by an extrusion pusher as an extrusion means from above. A simple workpiece cutting device is described.

  This workpiece cutting device positions and fixes a plurality of block-shaped workpieces without using an adhesive. In the workpiece cutting device capable of down-cutting, if the cut piece workpiece is cut as it is, there is a risk that a momentary strong tension is applied to the wire depending on the posture of the falling piece workpiece and the block workpiece being cut. As a result, the wire may be broken, and the cutting accuracy of the workpiece may be affected.

  The present invention has been made in view of the above, and a workpiece cutting apparatus in which the behavior of a wire is stabilized without using an adhesive, the risk of wire breakage is reduced, and the workpiece cutting accuracy is improved. An object is to provide a work cutting method.

  In order to solve the above-described problems and achieve the object, the workpiece cutting device includes a plurality of wires that simultaneously cut a plurality of block-shaped workpieces into a plurality of piece-shaped workpieces by pressing end surfaces of a plurality of block-shaped workpieces against each other. A workpiece cutting unit having a workpiece storage unit in which the workpiece is held and stored, an extrusion unit that pushes the workpiece stored in the workpiece storage unit against the workpiece cutting unit fixed in position, and the piece And a drop height regulating plate for regulating the drop height of the piece-like workpiece.

  Thereby, the fall height of a piece-like workpiece is regulated. For this reason, it can prevent that the influence by the fall of a piece-like workpiece reaches a wire. As a result, the possibility that momentary strong tension is applied to the wire due to the posture of the falling piece-like workpiece and the block-like workpiece being cut is reduced. This reduces the risk of wire breakage. In addition, cutting accuracy is improved. In addition, since no adhesive is used, a bonding process and a peeling process that require a great amount of time are unnecessary, and the entire cutting process can be significantly shortened.

  As a desirable mode of the present invention, it is preferable that the drop height of the piece-like workpiece is regulated to be equal to or less than the height of the block-like workpiece. As a result, the upper and lower end surfaces of the piece-shaped workpiece are free while moving on the drop height regulating plate, but the left and right end surfaces are positioned on the positioning reference plate, the positioning holding member, the clamping reference plate, and the clamping plate. It is regulated by any one of the holding member, the end face of the uncut block-shaped workpiece, and the cut piece-shaped workpiece. As a result, the behavior of the falling piece work is stabilized.

  As a desirable aspect of the present invention, any one of the positioning reference plate, the positioning holding member, the clamping reference plate, and the clamping holding member that forms the workpiece storage portion is cut from the drop height regulating plate. It is preferable that the distance to the end in the direction is regulated to be shorter than the length of the piece-shaped workpiece in the direction in which the workpiece is cut. As a result, the upper and lower end surfaces of the piece-shaped workpiece contacting any one of the positioning reference plate, the positioning holding member, the clamping reference plate, and the clamping holding member are free while moving on the drop height regulating plate. However, one of the left and right end surfaces is regulated by any one of a positioning reference plate, a positioning holding member, a clamping reference plate, and a clamping holding member. As a result, the behavior of the falling piece work is stabilized.

  In order to solve the above-described problems and achieve the object, the workpiece cutting method prepares a workpiece as an assembly in which end faces of a plurality of block-shaped workpieces are pressed against each other, and inputs the workpiece into a workpiece cutting device. A cutting step of extruding the workpiece while holding the workpiece with respect to a workpiece cutting portion having a plurality of wires that simultaneously cut the workpiece into a plurality of piece-like workpieces. In the cutting step, The piece-like workpiece cut by the workpiece cutting unit is placed on a drop height regulating plate, and one of the end faces of the piece-like workpiece is in contact with the end face of the block-like workpiece adjacent to the piece-like work. It is characterized by including a state.

  As a result, either one of the end faces of the piece-shaped workpiece is in contact with the end face of the block-shaped workpiece while the piece-shaped workpiece cut by the wire of the workpiece cutting portion moves to the drop height regulating plate. The end face of the plate serves as a guide for dropping the piece-like workpiece. As a result, the piece-like workpiece moves to the fall height regulating plate while maintaining the regulated posture. For this reason, it can prevent that the influence by the fall of a piece-like workpiece reaches a wire. Moreover, the possibility that momentary strong tension is applied to the wire due to the posture of the falling piece-like workpiece and the block-like workpiece being cut is reduced. This reduces the risk of wire breakage. In addition, since no adhesive is used, a bonding process and a peeling process that require a great amount of time are unnecessary, and the entire cutting process can be significantly shortened.

  As a desirable aspect of the present invention, in the cutting step, it is preferable that a height at which the piece-like workpiece cut by the workpiece cutting unit falls is equal to or less than a height of the block-like workpiece. As a result, the upper and lower end surfaces of the piece-shaped workpiece are free while moving on the drop height regulating plate, but the left and right end surfaces are positioned on the positioning reference plate, the positioning holding member, the clamping reference plate, and the clamping plate. It is regulated by any one of the holding member, the end face of the uncut block-shaped workpiece, and the cut piece-shaped workpiece. As a result, the behavior of the falling piece workpiece is stabilized.

  As a desirable mode of the present invention, in the cutting step, from the drop height regulating plate, a positioning reference plate, a positioning holding member, a clamping reference plate, and a clamping reference plate that the workpiece cutting device has to hold the workpiece. It is preferable that the distance to the end of the holding member in the direction in which the workpiece is cut is regulated to be shorter than the length of the piece-like workpiece in the direction in which the workpiece is cut. As a result, the upper and lower end surfaces of the piece-shaped workpiece contacting any one of the positioning reference plate, the positioning holding member, the clamping reference plate, and the clamping holding member are free while moving on the drop height regulating plate. However, one of the left and right end surfaces is regulated by any one of a positioning reference plate, a positioning holding member, a clamping reference plate, and a clamping holding member. As a result, the behavior of the falling piece workpiece is stabilized.

  As a desirable mode of the present invention, after all the lowermost block-shaped workpieces are cut by the workpiece cutting portion in the cutting step, a workpiece unloading step of pushing down the fall height regulating plate and unloading the cut piece-shaped workpiece. It is preferable to contain. Thereby, a piece-like work is carried out efficiently.

  In the workpiece cutting apparatus and the workpiece cutting method of the present invention, the behavior of the wire is stable without using an adhesive, the risk of wire breakage is reduced, and the workpiece cutting accuracy is improved.

FIG. 1 is a schematic view of a workpiece cutting device. FIG. 2 is a flowchart for explaining a cutting process of the workpiece cutting apparatus according to the present embodiment. FIG. 3 is an explanatory diagram for explaining a cutting process of the workpiece cutting apparatus. FIG. 4 is an explanatory diagram for explaining a cutting process of the workpiece cutting apparatus. FIG. 5 is an explanatory diagram for explaining a cutting process of the workpiece cutting apparatus. FIG. 6 is an explanatory diagram for explaining a cutting process of the workpiece cutting apparatus. FIG. 7 is a schematic diagram illustrating a drop height regulating plate according to the second embodiment. FIG. 8 is a perspective view showing a specific configuration of the workpiece cutting device. FIG. 9 is a perspective view illustrating a specific configuration of a workpiece cutting device according to a modification. FIG. 10 is a schematic view showing a modification of the work assembly.

  DESCRIPTION OF EMBODIMENTS Embodiments (embodiments) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited by the contents described in the following embodiments. The constituent elements described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the constituent elements described below can be appropriately combined.

(Embodiment 1)
FIG. 1 is a schematic view of a workpiece cutting device. The workpiece cutting device 100 includes a workpiece cutting unit 10 including a plurality of wires 11, a positioning reference plate 21, a clamping reference plate 31, a positioning holding member 22, a clamping holding member 32, an extrusion pusher 40, a workpiece And a receiving plate 80. Further, a space surrounded by the positioning reference plate 21, the clamping reference plate 31, the positioning holding member 22, and the clamping holding member 32 is a storage unit (work storage unit) of the workpiece assembly 1.

  The block-shaped workpieces 2 are stacked in a plurality of stages, and the block-shaped workpieces 2 gather to form a workpiece assembly 1. Moreover, the block-shaped workpieces 2 are arranged in a plurality of rows, and the block-shaped workpieces 2 are gathered to form a workpiece assembly 1. The block-shaped workpieces 2 are positioned and fixed without using an adhesive. The block-shaped workpiece 2 has a rectangular shape, for example, a rectangular parallelepiped having the same shape.

  The block-shaped workpiece 2 can be made of a hard and brittle material such as a semiconductor material, a glass material, a ceramic, and a magnetic material. The block-shaped workpiece 2 can be an expensive material, for example, a rare earth sintered magnet.

  The workpiece cutting unit 10 is a multi-wire saw system driven by a plurality of guide rollers 12a and 12b in which a plurality of wires 11 arranged at predetermined intervals and guide grooves for stably running these wires 11 are formed. It is a cutting means.

  The wire 11 is a metal wire such as carbon steel. The workpiece cutting unit 10 including the plurality of wires 11 reciprocates the plurality of wires 11 by the guide rollers 12a and 12b. The workpiece assembly 1 to be cut is simultaneously cut into a plurality of piece-like workpieces by the plurality of wires 11. Since the workpiece assembly 1 is simultaneously cut into a plurality of piece-like workpieces, the workpiece cutting device 100 is a multi-wire type cutting device. The wire 11 of the workpiece cutting unit 10 is, for example, a fixed abrasive method.

  The positioning reference plate 21 is parallel to the cutting surface of the workpiece cutting unit 10 by the wire 11 (a vertical surface formed by the wire 11 by relative movement at the time of cutting) and the positioning reference surface 21a in which the positional relationship with the wire 11 is set. Have

  The positioning holding member 22 prevents the workpiece from being displaced in a direction (front-rear direction) perpendicular to the positioning reference surface 21a in a state where the workpiece assembly 1 is pressed against the positioning reference surface 21a as shown by an arrow A during cutting. It is a member for positioning the assembly 1.

  The workpiece cutting device 100 places the positioning holding member 22 opposite to the positioning reference plate 21. The positioning holding member 22 is formed, for example, in the shape of a vertically long bar, and is elastically slidable in the cutting direction (vertical direction) by pressing the workpiece assembly 1 to be positioned against the positioning reference surface 21a. Position. For this reason, the positioning holding member 22 has pressing means such as a spring. Then, the positioning reference plate 21 and the positioning holding member 22 become the workpiece positioning body 20A. Here, the positioning holding member 22 is provided for each column in the left-right direction of the block-like workpieces 2 in order to eliminate variations in pressing against the workpiece assembly 1 composed of the plurality of block-like workpieces 2.

  The clamping reference plate 31 has a clamping reference surface 31a in which a positional relationship that is orthogonal to the longitudinal direction of the wire 11 of the workpiece cutting unit 10 is set. As shown in FIG. 1, the clamping reference plate 31 has comb-shaped ends in the direction in which the workpiece assembly 1 is cut, and a plurality of gaps are formed. Further, the wire 11 passes through the gap of the clamping reference plate 31.

  The holding member 32 for clamping prevents the workpiece from shifting in a direction (left-right direction) perpendicular to the reference surface 231a for clamping in a state where the workpiece assembly 1 is pressed against the reference surface 31a for clamping as indicated by an arrow B at the time of cutting. It is a member for clamping both ends of the assembly 1.

  In the workpiece cutting device 100, the holding member 32 for clamping is arranged to face the reference plate 31 for clamping. The holding member 32 for clamping is formed, for example, in the shape of a vertically long bar, and is elastically slidable in the cutting direction (vertical direction) by pressing the workpiece assembly 1 to be clamped against the clamping reference surface 31a. Hold it. For this reason, the holding member 32 for clamping has a pressing means by a spring or the like. The clamping reference plate 31 and the clamping holding member 32 become a workpiece clamping body 30A that is positioned by the workpiece positioning body 20A and clamps both ends of the workpiece assembly 1 positioned in the wire longitudinal direction. Here, the holding member 32 for clamping is provided for each of the rows in the front-rear direction of the block-shaped workpieces 2 in order to eliminate variations in pressing against the workpiece assembly 1 including the plurality of block-shaped workpieces 2.

  The clamping reference plate 31 and the clamping holding member 32 are integrated into a guide frame shape surrounding the workpiece assembly 1 together with the positioning reference plate 21 and the positioning holding member 22 to form a storage portion for the workpiece assembly 1.

  The extrusion pusher 40 is an extrusion means that extrudes the workpiece assembly 1 in the direction in which the workpiece assembly 1 is cut (arrow U). The pusher pusher 40 preferably has an area that can uniformly press the entire upper surface of the workpiece assembly 1. The area of the pusher pusher 40 is the opening of the storage portion of the work assembly 1 that is a space surrounded by the positioning reference plate 21, the positioning holding member 22, the clamping reference plate 31, and the clamping holding member 32. It is equal to the area, or is an area that is not in contact with the positioning reference plate 21, the positioning holding member 22, the clamping reference plate 31, and the clamping holding member 32.

  The workpiece receiving plate 80 is a drop height regulating plate that regulates the drop height of the piece-like workpiece obtained by cutting the workpiece assembly 1 by the workpiece cutting unit 10. Here, the drop height is the height in the direction in which the workpiece assembly 1 is cut (the direction of the arrow U). Note that the direction in which the workpiece assembly 1 is cut (the direction of the arrow U) is a direction parallel to the direction in which the above-described pushing means pushes out the workpiece assembly 1. The falling height of the piece-like workpiece is regulated by the workpiece receiving plate 80 so as to be equal to or less than the height of the block-like workpiece included in the workpiece assembly 1. The area of the workpiece receiving plate 80 is larger than the area of the workpiece assembly 1 on the workpiece cutting portion 10 side, and the thickness is rigid enough to prevent deformation even when one block of workpieces of the workpiece assembly 1 is mounted. Thickness is assumed.

  Next, the operation of the workpiece cutting device 100 will be described. FIG. 2 is a flowchart for explaining a cutting process of the workpiece cutting apparatus. 3 to 6 are explanatory views for explaining a cutting process of the workpiece cutting device. The cutting process of the workpiece cutting device 100 will be described along the flowchart of FIG.

  The workpiece cutting device 100 prepares a workpiece receiving plate 80 (step S1). For example, as shown in FIG. 3, the workpiece receiving plate 80 includes a clamping reference plate 31, a clamping holding member 32, and a position below the wire 11 (direction in which the pushing means pushes the workpiece assembly 1 (arrow U (Direction) side) by a lift mechanism or the like. Although not shown, the workpiece receiving plate 80 is located below the position of the end portion of the positioning reference plate 21 and the positioning holding member 22 in the direction in which the workpiece assembly 1 is cut (the pushing means is the workpiece assembly). 1 in the direction of pushing 1).

  Next, the workpiece cutting device 100 puts the workpiece into the workpiece storage unit of the workpiece cutting device 100 (step S2). The workpiece assembly 1 is thrown into the workpiece storage unit as an assembly in which the end faces of a plurality of block-shaped workpieces are pressed against each other. As shown in FIG. 3, the work aggregate 1 includes block-shaped works 2 </ b> A to 2 </ b> L. As shown in FIG. 1, the workpiece assembly 1 is held between the positioning reference plate 21 and the positioning holding member 22 and between the clamping reference plate 31 and the clamping holding member 32.

  Next, the workpiece cutting device 100 cuts the workpiece (step S3). In the workpiece cutting device 100 shown in FIG. 1, a plurality of wires 11 reciprocate by guide rollers 12a and 12b. The workpiece cutting device 100 positions and fixes a plurality of block-shaped workpieces 2 without using an adhesive. For this reason, the block-shaped workpiece 2 is pushed out toward the lower wire 11 by the push pusher 40 and cut only by stacking the block-shaped workpieces 2 in a plurality of stages. The pusher pusher 40 pushes out the workpiece assembly 1, and the block workpieces 2 that are not bonded to each other are pushed out. Here, between the positioning reference plate 21 and the positioning holding member 22 and between the clamping reference plate 31 and the clamping holding member 32, a guide in a direction in which the pusher pushes the workpiece assembly 1. Will play a role.

  Since the workpiece assembly 1 including the block workpieces 2A to 2L is not bonded, as shown in FIG. 4, when the cutting is finished, the workpiece assembly 1 becomes a piece workpiece 2a and the like and falls onto the workpiece receiving plate 80 one by one. To do. Depending on the state of the wire 11, there may be a time difference in the cutting of the workpiece assemblies 1 even in the block-like workpieces 2 </ b> A, 2 </ b> B, and 2 </ b> C at the same stage on the side where the workpiece assembly 1 is cut. For example, the block-shaped workpiece 2A shown in FIG. 3 is first cut into a piece-shaped workpiece 2a shown in FIG. The piece-like workpiece 2a moved onto the drop surface 80a on the workpiece assembly 1 side of the workpiece receiving plate 80 shown in FIG. 4 is in contact with the holding member 32 for clamping and one surface of the piece-like workpiece 2a. The distance is a distance T1 in a direction (arrow U direction) in which the workpiece assembly 1 is cut. FIG. 4 illustrates an example in which the piece-like workpiece 2a moved onto the workpiece receiving plate 80 is in contact with the holding member 32 for holding and one end surface of the piece-like workpiece 2a. Instead of 32, any one of the positioning reference plate 21, the positioning holding member 22, and the clamping reference plate 31 may come into contact with one surface of the end surface of the piece workpiece 2a. Further, the piece-like workpiece 2a is in contact with the block-like workpiece 2B being cut by the workpiece cutting unit 10 and one end surface of the piece-like workpiece 2a, and the contact distance is a distance in a direction in which the workpiece assembly 1 is cut. T2. The spatial distance T3 generated in the direction in which the workpiece assembly 1 is cut (the direction of the arrow U) is the distance between the block-like workpieces 2B and 2C being cut by the workpiece cutting unit 10 and the workpiece receiving plate 80. The spatial distance T3 is smaller than the height WT, which is the length in the direction (arrow U direction) in which the workpiece assembly 1 of the block-like workpiece is cut. Further, the space height T4 in the direction (arrow U direction) in which the workpiece assembly 1 is cut as a result of the piece-like workpiece 2a moving on the workpiece receiving plate 80 is also smaller than the height WT of the block-like workpiece. Here, the length in the direction (arrow U direction) in which the workpiece assembly 1 of the block-like workpiece 2A is cut is the length in the direction in which the workpiece assembly 1 of the piece-like workpiece 2a is cut (arrow U direction). It is the same as the height wt of a piece of workpiece. The space height T4 is the drop height of the piece-like workpiece 2a. Thereby, the fall height of the piece-like workpiece 2a is regulated by the workpiece receiving plate 80 so as to be equal to or less than the individual height WT of the block-like workpieces 2A to 2L included in the workpiece assembly 1.

  The space height T4, which is the drop height, is a direction (arrow) in which the workpiece assembly 1 of the block-like workpiece 2D that is extruded by the extrusion pusher 40 next to the piece-like workpiece 2a and cut into the wire 11 is cut. It is shorter than the distance (T1 + T4) from the surface 2z in the (U direction) to the end in the direction (arrow U direction) in which the workpiece assembly 1 of the clamping reference plate 31 or the clamping holding member 32 is cut. Moreover, from the fall surface 80a of the workpiece receiving plate 80 on which the piece-like workpiece 2a falls, to the end in the direction (arrow U direction) in which the workpiece assembly 1 of the clamping reference plate 31 or the clamping holding member 32 is cut. The distance T5 is shorter than the height wt of the piece workpiece, which is the length in the direction (arrow U direction) in which the workpiece assembly 1 of the piece workpiece 2a is cut, and is regulated by the workpiece receiving plate 80. The same applies to a positioning reference plate or a positioning holding member (not shown). That is, any one workpiece set of the positioning reference plate 21, the positioning holding member 22, the clamping reference plate 31, and the clamping holding member 32 that form the workpiece storage portion from the workpiece receiving plate 80 that is a drop height regulating plate. The distance T5 to the end in the direction in which the body 1 is cut is preferably regulated to be shorter than the length wt in the direction in which the work assembly 1 of the piece-like work 2a is cut. As a result, the upper and lower end surfaces of the piece-like workpiece 2a are free while moving on the drop height regulation plate, but the left and right and front and rear end surfaces are the positioning reference plate 21, the positioning holding member 22, and the clamping reference. It is regulated by any one of the plate 31 and the holding member 32 for clamping. As a result, the behavior of the falling piece 2a is stabilized.

  When the space height T4 is, for example, 1/3 or more of the height WT of the block-shaped workpiece to 1/2 or less of the height WT of the block-shaped workpiece, the piece-shaped workpiece 2a is in contact with the end surface of the block-shaped workpiece 2B. The area increases. Thereby, the possibility that the falling piece-like workpiece 2a affects the posture of the block-like workpiece 2B being cut is further reduced.

  As shown in FIG. 4, the piece-like workpiece 2a drops in the direction of arrow Y parallel to the direction in which the workpiece assembly 1 is cut (direction of arrow U), and guides the end face of the holding member 32 for clamping or the block-like workpiece 2B. As a result, it moves onto the workpiece receiving plate 80 by its own weight. While the piece-like workpiece 2a moves on the workpiece receiving plate 80, the upper and lower end surfaces are free, but the left and right and front and rear end surfaces are the positioning reference plate 21, the positioning holding member 22, the clamping reference plate 31, and the clamping plate. The holding member 32, the piece-like workpiece 2a is regulated by any one of the end face of the adjacent block-like workpiece 2B and the cut piece-like workpiece. That is, in the cutting process, in a state where the block-shaped workpiece 2A to be cut by the wire 11 of the workpiece cutting unit 10 is placed on the drop height regulating plate 80, one of the end surfaces of the piece-shaped workpiece 2a is the block-shaped workpiece 2A. It includes a state where it is in contact with an end face of the block-shaped work adjacent to the end face, for example, an end face of the block-shaped work 2B. For this reason, the posture of the falling piece-like work 2a is stabilized. Moreover, the possibility that the falling piece-like workpiece 2a affects the posture of the block-like workpiece 2B being cut is reduced. As a result, the possibility of momentary strong tension occurring in the wire 11 due to the posture of the falling piece-like workpiece 2a and the block-like workpieces 2B, 2C being cut is reduced. This reduces the risk of wire breakage. Moreover, since the wire 11 cuts the block-shaped workpieces 2B and 2C with a constant tension, the cutting accuracy of the block-shaped workpieces 2B and 2C is improved.

  The workpiece cutting device 100 cuts the workpiece until the extrusion pusher 40 reaches a predetermined push-out amount that pushes the workpiece assembly 1 in the direction (arrow U direction) in which the workpiece assembly 1 is cut (step S4, No; step S3). . In the workpiece cutting device 100, when the extrusion pusher 40 has a predetermined extrusion amount for extruding the workpiece assembly (step S4, Yes), the block-shaped workpieces 2A, 2B, and 2C for one stage are the piece-shaped workpieces 2a, 2b, and 2c. Disconnected. In FIG. 5, the block-shaped workpieces 2A, 2B, and 2C for one stage fall in the direction in which the workpiece assembly 1 is cut (arrow U direction) and are aligned with the workpiece receiving plate 80 as the piece-like workpieces 2a, 2b, and 2c. The state mounted in the state is shown.

  Next, the workpiece cutting device 100 carries out the workpiece (step S5). As shown in FIG. 6, the workpiece receiving plate 80 is pushed down in a direction (arrow U direction) in which the workpiece assembly 1 is cut by a lift mechanism or the like, and the piece-like workpieces 2a, 2b, and 2c can be taken out. When all the workpieces have not been cut (step S6, No), the workpiece cutting device 100 prepares a workpiece receiving plate 80 (step S7). Then, the workpiece cutting device 100 performs workpiece cutting (step S3). When all the workpieces have been cut (step S6, Yes), the workpiece cutting device 100 ends the cutting process.

  As described above, the workpiece cutting apparatus 100 according to the present embodiment includes a plurality of wires 11 that simultaneously cut the workpiece assembly 1 that is formed by pressing end surfaces of a plurality of block-shaped workpieces 2 into a plurality of piece-shaped workpieces. A cutting direction (the direction of the arrow U) with respect to the workpiece cutting unit 10, the workpiece storage unit in which the workpiece assembly 1 is held and stored, and the workpiece assembly 1 stored in the workpiece storage unit. And an extruding pusher 40 as extruding means, and a work receiving plate 80 on which a piece-like workpiece is placed and which is a drop height regulating plate for regulating the drop height of the piece-like workpiece.

  Thereby, the fall height of a piece-like workpiece is regulated. For this reason, it is possible to prevent the influence of the piece-like work falling in the direction in which the work aggregate is cut from reaching the wire. As a result, the possibility that momentary strong tension is applied to the wire due to the posture of the falling piece-like workpiece and the block-like workpiece being cut is reduced. This reduces the risk of wire breakage. In addition, cutting accuracy is improved. In addition, since no adhesive is used, a bonding process and a peeling process that require a great amount of time are unnecessary, and the entire cutting process can be significantly shortened.

  It is preferable that the drop height of the piece-like workpiece is regulated to be equal to or less than the height WT of the block-like workpiece. As a result, the upper and lower end surfaces of the piece-shaped workpiece are free while moving on the drop height regulating plate, but the left and right and front and rear end surfaces are the positioning reference plate 21, the positioning holding member 22, and the clamping reference plate. 31, the holding member 32 for clamping, the end surface of the block-shaped workpiece 2 that is not cut, and the cut piece-shaped workpiece. As a result, the behavior of the falling piece workpiece is stabilized.

  As described above, the workpiece cutting method according to the present embodiment prepares a workpiece assembly 1 in which the end surfaces of a plurality of block-shaped workpieces 2 are pressed against each other, and inputs the workpiece assembly 1 into the workpiece cutting apparatus 100. Step (step 2) and a cutting step (step for extruding the workpiece assembly 1 in a state where the workpiece assembly 1 is held against the workpiece cutting unit 10 having a plurality of wires 11 that simultaneously cut the workpiece assembly 1 into a plurality of piece-like workpieces. S3), the cutting step (step S3) is a state in which the piece-like workpiece cut by the workpiece cutting unit 10 is placed on the workpiece receiving plate 80 which is a drop height regulating plate, and the piece-like piece Any one of the end surfaces of the workpiece includes a state in contact with the end surface of the adjacent block-shaped workpiece 2. In the cutting process (step S3), the positioning reference plate 21, the positioning holding member 22, the clamping reference plate 31, and the clamping holding member 32 of the workpiece cutting apparatus 100 hold the workpiece assembly 1.

  As a result, one of the end faces of the piece-shaped workpiece is in contact with the end face of the block-shaped workpiece while the piece-shaped workpiece cut by the wire of the workpiece cutting portion moves to the drop height regulating plate. The end surface serves as a guide for dropping the piece-like workpiece. As a result, the piece-like workpiece moves to the fall height regulating plate while maintaining the regulated posture. For this reason, it can prevent that the influence by the fall of a piece-like workpiece reaches a wire. Moreover, the possibility that momentary strong tension is applied to the wire due to the posture of the falling piece-like workpiece and the block-like workpiece being cut is reduced. This reduces the risk of wire breakage. In addition, cutting accuracy is improved. In addition, since no adhesive is used, a bonding process and a peeling process that require a great amount of time are unnecessary, and the entire cutting process can be significantly shortened.

  In the cutting step (step S3), it is preferable that the height at which the piece-like workpieces 2a, 2b, 2c cut by the workpiece cutting unit 10 drop is equal to or less than the height WT of the block-like workpiece. As a result, the upper and lower end surfaces of the piece-like workpiece 2a are free while moving on the drop height regulation plate, but the left and right and front and rear end surfaces are the positioning reference plate 21, the positioning holding member 22, and the clamping reference. It is regulated by any one of the plate 31, the holding member 32 for clamping, the end surfaces of the uncut block-like workpieces 2A to 2L, and the cut piece-like workpieces 2b and 2c. As a result, the behavior of the falling pieces 2a, 2b, 2c is stabilized.

  In the cutting step (step S3), the positioning reference plate 21, the positioning holding member 22, and the clamping member included in the workpiece cutting device 100 for holding the workpiece assembly 1 from the workpiece receiving plate 80, which is a drop height regulating plate. The distance T5 to the end in the direction in which the workpiece assembly 1 of any one of the reference plate 31 and the holding member 32 for clamping is cut is the length wt in the direction in which the workpiece assembly 1 of the piece-like workpiece 2a is cut. It is preferable to be regulated shorter. As a result, the upper and lower end surfaces of the piece-like workpiece 2a are free while moving on the drop height regulation plate, but the left and right and front and rear end surfaces are the positioning reference plate 21, the positioning holding member 22, and the clamping reference. It is regulated by any one of the plate 31 and the holding member 32 for clamping. As a result, the behavior of the falling piece 2a is stabilized.

  In the cutting step (step S3), after the lowermost block-like workpieces 2A, 2B, and 2C are all cut by the workpiece cutting unit 10, the workpiece receiving plate 80 that is a drop height regulating plate is pushed down to cut the piece. It is preferable to include a workpiece unloading step (step S5) for unloading the workpieces 2a, 2b, and 2c. Thereby, a piece-like work is carried out efficiently.

(Embodiment 2)
FIG. 7 is a schematic diagram illustrating a drop height regulating plate according to the second embodiment. The workpiece receiving plate 80 which is a drop height regulating plate according to the present embodiment is characterized by having a rotation mechanism 81. In the following description, the same components as those described in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted.

  The workpiece cutting device 100 according to the present embodiment includes a rotation mechanism 81 on a workpiece receiving plate 80. In the workpiece unloading step (step S5) shown in FIG. 2 of the first embodiment described above, the workpiece receiving plate 80 is pushed down by a lift mechanism or the like as shown in FIG. 6, and the piece-like workpieces 2a, 2b, 2c are taken out. it can. As shown in FIG. 7, the work receiving plate 80 of this embodiment is tilted by the rotating mechanism 81 when the work receiving plate 80 is pushed down in the direction in which the work assembly 1 is cut (direction of arrow U) by a lift mechanism or the like. Let For example, the piece workpieces 2a, 2b, 2c slide down from the inclined workpiece receiving plate 80 in the order of the piece workpieces 2a, 2b, 2c on the belt conveyor 85 in FIG. Thereby, the workpiece | work cutting device 100 of this embodiment can perform taking out of a piece-shaped workpiece | work smoothly.

  As described above, after the lowermost block-shaped workpieces 2A, 2B, and 2C are all cut by the workpiece cutting unit 10 in the cutting step (step S3), the workpiece receiving plate 80 that is a drop height regulating plate is pushed down and cut. It is preferable to include a workpiece unloading step (step S5) for unloading the piece-shaped workpieces 2a, 2b, and 2c. Here, it is preferable to carry out the cut piece-like workpieces 2a, 2b, 2c by tilting the workpiece receiving plate 80, which is a drop height regulating plate. Thereby, a piece-like work is carried out efficiently.

(Modification)
FIG. 8 is a perspective view showing a specific configuration of the workpiece cutting device. In the workpiece cutting apparatus 100 according to the first and second embodiments described above, the positioning reference plate 21 and the clamping reference plate 31 have one side as a positioning reference surface 21a and a clamping reference surface 31a. FIG. 9 is a perspective view illustrating a specific configuration of a workpiece cutting device according to a modification. In the workpiece cutting device 101 of FIG. 9, both the positioning reference plate 21 and the clamping reference plate 31 are used as a positioning reference surface 21a and a clamping reference surface 31a. For example, a cross-shaped partition plate 90 is provided, and the partition plate 90 is used as the positioning reference plate 21 and the clamping reference plate 31, and the work storage portions for four places are provided, thereby storing the work aggregate 1. Can be increased. The workpiece cutting device 101 of the modification can be a plate material in which the workpiece receiving plate is integrally formed under the workpiece storage portions for four places. Alternatively, the workpiece cutting apparatus 101 according to the modified example may have separate workpiece receiving plates for each of the four workpiece storage units. The pusher pusher 40 has push parts 40a to 40d for each work storage part. FIG. 10 is a schematic view showing a modification of the work assembly 1. The workpiece assembly 1 is not limited to a block-shaped workpiece having a rectangular parallelepiped shape, and for example, a tile-shaped workpiece 300 as shown in FIG. 10 may be stacked in multiple stages. The present invention can be applied in the same manner as long as it is formed to have a length that is an integral multiple of the thickness required for the cut piece-shaped workpiece and the end faces at both ends thereof are parallel in a vertical state.

DESCRIPTION OF SYMBOLS 1 Work assembly 2, 2A-2L Block-shaped work 2a, 2b, 2c Single piece work 10 Work cutting part 11 Wire 12a, 12b Guide roller 21 Positioning reference plate 21a Positioning reference surface 22 Positioning holding member 31 Clamping reference 31 Plate 31a Reference surface for clamping 32 Holding member for clamping 40 Extrusion pusher 80 Work receiving plate 81 Rotating mechanism

Claims (7)

A workpiece cutting unit having a plurality of wires that simultaneously cut a plurality of block-shaped workpieces into a plurality of piece-shaped workpieces by pressing the end faces of a plurality of block-shaped workpieces together;
A workpiece storage section in which the workpiece is held and stored;
Extrusion means for extruding the workpiece stored in the workpiece storage unit against the workpiece cutting unit fixed in position;
A drop height regulating plate on which the piece-like workpiece is placed and regulates the drop height of the piece-like workpiece;
A workpiece cutting device comprising:   The workpiece cutting device according to claim 1, wherein a drop height of the piece-like workpiece is regulated to be equal to or less than a height of the block-like workpiece.   The distance from the drop height regulating plate to the end in the direction in which any one of the positioning reference plate, positioning holding member, clamping reference plate, and clamping holding member that forms the workpiece storage portion is cut However, the workpiece cutting device according to claim 1, wherein the workpiece is regulated to be shorter than a length of the piece-shaped workpiece in a direction in which the workpiece is cut. Preparing a workpiece as an assembly in which the end faces of a plurality of block-shaped workpieces are pressed against each other, and a workpiece loading step of loading the workpiece into a workpiece cutting device;
A cutting step of extruding the workpiece in a state where the workpiece is held, with respect to a workpiece cutting portion having a plurality of wires that simultaneously cut the workpiece into a plurality of piece-like workpieces,
In the cutting step, the piece-like workpiece cut by the workpiece cutting portion is placed on a drop height regulating plate, and one of the end faces of the piece-like workpiece is a block-like workpiece adjacent to the piece-like workpiece. A workpiece cutting method comprising a state of being in contact with an end face of the workpiece.   The workpiece cutting method according to claim 4, wherein in the cutting step, a height at which the piece-like workpiece cut by the workpiece cutting unit falls is equal to or less than a height of the block-shaped workpiece.   In the cutting step, any one of a positioning reference plate, a positioning holding member, a clamping reference plate, and a clamping holding member included in the workpiece cutting device for holding the workpiece from the drop height regulating plate. The work cutting method according to claim 4 or 5, wherein a distance to an end in a direction in which the work is cut is regulated to be shorter than a length of the piece-like work in a direction in which the work is cut.   7. A work unloading step of depressing a drop height regulating plate and unloading the cut piece-shaped work after the lowermost block-shaped work is cut by the work cutting portion in the cutting step. The workpiece cutting method according to any one of the above.

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