JP2009220262A - Machining apparatus of plate material - Google Patents

Abstract

Provided is a plate material processing apparatus that can stack a larger number of polarizing plates and resin plates, can be ground with good stability even when stacked, and can reduce processing costs.
As a plate material processing measure, a material pressing drive means (10) installed at an upper end of a pressing beam (7), an upper jig (13) for pressing the material, and a rotary table (20) A lower jig (14) for installing a plurality of workpieces, a rotary table drive device in which a pulley and a timing belt are wound up and down, two linear guide blocks provided with a rack, and the linear guide block Two L-shaped center clamps (44) fixed to the rack, and the rack is meshed with the pinion (45) and arranged symmetrically, and two sets of clamp devices for sandwiching the workpiece, 2) and the movable table (2) is configured to be reciprocally movable in the two cutter directions of the cross beam (3) provided with the two spindle cutters 6.
[Selection] Figure 3

Description

  The present invention is a plate material processing apparatus for cutting and shaping the periphery of a processed material such as a polarizing plate for liquid crystal used in a mobile phone and a resin plate such as a printed circuit board by grinding, particularly far more than conventional. The present invention relates to an apparatus for processing a plate material that can grind the periphery of the plate material by stacking a large number of plate materials and can perform accurate grinding without disturbing the stacked plate materials.

  As shown in FIG. 7, the liquid crystal polarizing plate and the resin plate such as a printed circuit board are stacked with a large number of plate materials (hereinafter referred to as workpiece W) and pressed from above and below, and both sides of the piled workpiece W are stacked. The surface is ground by a cutter 66 (see FIG. 8), and then the other side surfaces are ground by changing the angle (by turning 90 degrees). Conventionally, a lower jig 64 is placed on the swivel table 60, a plurality of workpieces W are placed on the lower jig 64, and a rotatable shaft 65 is mounted on the upper portion with a ball spline 67. The timing belt (68, 68) wound around the pulley (71, 72, 73, 74) with the upper jig 63 attached to the lower end of the shaft 65 and the cylinder 70 being driven to hold the plate material W. 69), the swivel table 60 is set by rotating it by a predetermined angle, moved while holding the workpiece W, and one side surface is first ground by the cutters 66 and 66 (see FIG. 8), and then predetermined. The other side surfaces were ground by rotating the angle (90 degrees). FIG. 8 is a partial perspective view showing the arrangement of the turning table 60, the upper jig 63, the lower jig 64, the timing belt 68, the pulley 71, the cutters 66, 66, and the like (Patent Document 1).

Japanese Patent Application No. 2007-007294

  In the conventional plate material processing apparatus having the above-described configuration, there is a limit to the number of polarizing plates to be processed when the polarizing plates W used in a mobile phone or the like are stacked and processed. That is, when the plate materials W to be processed are stacked, there is a problem that a large number of plate materials cannot be processed with high accuracy because they are thin and high and unstable. When the workpieces W are stacked, if the processing height is low, the processing efficiency is deteriorated and the cost cannot be reduced. Further, the workpiece W has various dimensions, and it is complicated to set it during processing.

  The present invention has been made in order to cope with the above-described problems, and it is easy to stack a large number of polarizing plates and resin plates and set them according to the dimensions. It is an object to provide a plate material processing apparatus that can be ground and can reduce the processing cost.

That is, in order to solve the above-described problems, the invention described in claim 1 includes a material pressing drive means (10) installed above the pressing beam (7) and the material pressing drive means. A vertical axis (11) provided at the lower part of the vertical axis, an upper jig (13) installed at the lower end of the vertical axis, and a rotary table (20) installed below the upper jig (13). A plate material fixing comprising: a plurality of workpieces provided so as to rotate integrally at the center of the rotary table; and a lower jig (14) provided concentrically with the upper jig (13). Equipment,
An intermediate shaft (25) provided with an upper pulley (21) and a lower pulley (23) at both upper and lower ends inside a column portion (7a) formed in the vertical direction of the pressing beam (7);
An upper pulley (22) provided concentrically with the longitudinal axis (11) provided at a lower portion of the driving means (cylinder) (7); an upper pulley (21) provided on the upper pulley (22) and the intermediate shaft; A timing belt (31, 32) wound between a lower pulley (23) provided on the intermediate shaft (25) and a pulley (24) provided below the rotary table (20); A rotary table drive device comprising:
A ruler device (18) for contacting the X direction end face and the Y direction end face of the workpiece;
Two center clamps (44A, 44B) are arranged close to or away from the workpiece, and a center clamp device that rotates integrally with the rotary table (20) includes a moving table (2). As well as
A cross beam provided with two cutter devices (6, 6) provided with moving means for moving the moving table (2) at an arbitrary interval in a direction perpendicular to the moving table (6, 6) is arranged, and the moving table (2) ) Is a plate material processing apparatus capable of reciprocating in the direction of the two cutters (6, 6).

The invention according to claim 2 is the material pressing drive means (10) installed on the upper part of the pressing beam (7), the vertical axis (11) provided on the lower part of the material pressing drive means, The upper jig (13) installed at the lower end of the vertical axis, the rotary table (20) installed below the upper jig (13), and the central part of the rotary table so as to rotate integrally. A plate fixing device including a plurality of workpieces provided and a lower jig (14) provided concentrically with the upper jig (13);
An intermediate shaft (25) provided with an upper pulley (21) and a lower pulley (23) at both upper and lower ends inside a column portion (7a) formed in the vertical direction of the pressing beam (7);
An upper pulley (22) provided concentrically with the longitudinal axis (11) provided at a lower portion of the driving means (cylinder) (7); an upper pulley (21) provided on the upper pulley (22) and the intermediate shaft; A timing belt (31, 32) wound between a lower pulley (23) provided on the intermediate shaft (25) and a pulley (24) provided below the rotary table (20); A rotary table drive device comprising:
A ruler device (18) for contacting the X direction end face and the Y direction end face of the workpiece;
Two center clamps (44A, 44B) are arranged close to or away from the workpiece W, and a center clamp device that rotates integrally with the rotary table (20) is mounted on a fixed base. As well as
A cross beam provided with two cutters (6, 6) provided with moving means for moving at an arbitrary interval in a direction perpendicular to the fixed table and provided with driving means;
It is a plate material processing apparatus which enables the two cutters (6, 6) to reciprocate in a fixed base direction.

  According to a third aspect of the present invention, the clamp device includes an L-shaped linear guide block (41A, 41B), a rack (42A, 42B) fixed integrally to the linear guide block, and an L-shape fixed to the linear guide block. It comprises a center clamp (44A, 44B), meshes with a pinion (45) concentrically arranged at the lower part of the rotary table (20) and is arranged symmetrically, and one linear block is provided with drive means (46). , Arranged around the rotary table.

  Furthermore, the invention according to claim 4 is that the plate material processing apparatus is arranged such that the upper pulley (21) arranged at both upper and lower ends inside a column portion (7a) formed in the longitudinal direction of the pressing beam (7). And an intermediate shaft housing (19) that accommodates an intermediate shaft (25) to which the lower pulley (23) is fixed, and a column portion (7a) of the pressing beam (7). 19) and a male screw rod (27) that can adjust the tension of the timing belt.

  According to the above means, a large number of processing plate materials such as polarizing plates can be processed by a single grinding process. In addition, since grinding is performed while being held by a clamp device, it is possible to perform stable processing and high processing accuracy. Furthermore, by aligning the pinion with the center axis of the turntable and arranging two racks that mesh with the pinion via the turntable, it becomes possible to sandwich the workpiece at the center position of the turntable, The processing cost can be reduced by improving the work efficiency.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 and 2 are plan views of the plate material processing apparatus of the present invention. FIG. 1 shows a state in which the X direction ruler 18a and the Y direction ruler 18b of the ruler apparatus 18 are not applied to the workpiece W. 2 shows the state applied to the workpiece W. FIG. 3 is a side view of the plate material processing apparatus, and FIG. 4 is a partial cross-sectional view of the side view.

  As shown in FIGS. 1, 2, and 3, reference numeral 1 denotes a pedestal frame of the plate material processing apparatus according to the present invention. On the pedestal frame 1, a movable table 2, a cross beam 3, a spindle motor mounting saddle 4, 4. And a spindle cutter device (6, 6), a spindle motor (5, 5) and the like for rotationally driving the spindle cutter device (6, 6). This plate material processing apparatus includes a plate material fixing device, a rotary table driving device (pulley and timing belt, etc.), a ruler device 18, a workpiece clamping device, and the like.

  In the plate material fixing device, a saddle-like or inverted L-shaped holding beam 7, a drive device housing 8, and a center clamp device frame 9 are installed. Further, on the moving table 2, the fixing device for the workpiece W has the following configuration. That is, a cylinder 10 is installed as a driving means for pressing the material on the front upper side (upper end) of the pressing beam 7, and a ball spline 12 passing through the vertical axis 11 is provided below the pressing cylinder 10. An upper jig 13 is installed at the lower end of the vertical axis 11. A rotating table 20 (described later) is installed in the downward direction, and a lower jig 14 is provided at the center of the rotating table 20 so as to be concentric with the upper jig 13 so as to rotate integrally with the rotating table 20. is there. In this way, the workpiece W (for example, a polarizing plate) is placed between the lower jig 14 and the upper jig 13, and the material pressing cylinder 10 is operated and pressed. Furthermore, as will be described later, the workpiece W is clamped by a clamp device described later, and the end face of the plate material is ground in a state of being overlapped by the spindle cutter devices (6, 6).

  Reference numeral 18 shown in FIG. 1 is a ruler device for aligning the end surfaces of the workpiece W in the X direction and the Y direction, and an X direction ruler 18 a and a Y direction ruler 18 b fixed to the fixture 17, and a driving means 19. The end portion of the X direction end surface is aligned by the driving means 19, and the end surface of the Y direction end surface is aligned by moving the movable table 2 on which the entire rotary table 20 is placed in the X direction. Thus, the end surfaces of the workpiece W are aligned by adjusting the movement of the ruler device 18 and the movable table 2 according to the dimensions.

The rotary table driving device is configured as follows. As shown in FIG. 4, an intermediate shaft housing 19 is disposed inside a column portion 7a formed in the vertical direction of the pressing beam 7, and an upper pulley 21 and a lower pulley 23 are provided at both upper and lower ends inside. The provided intermediate shaft 25 is installed. Further, an upper pulley 22 is provided below the ball spline 12, and an upper timing belt 31 is wound between the pulley 22 and the upper pulley 21 attached to the intermediate shaft 25. Further, a lower pulley 24 is provided below the rotary table 20 concentrically with the rotary table 20, and a lower timing belt 32 is also provided between the lower pulley 24 and the lower pulley 23 attached to the intermediate shaft 25. Is wound. That is, the upper pulley 22, the rotary table 20, and the pinion 45 described later are concentric. With this configuration, the upper and lower timing belts 31 and 32 can rotate at the same time, and can be rotated around a single point on the rotary table 20 while the non-work material W is also pressed. However, the pinion 45 is in a stopped state even when the turntable 20 rotates.
Although not shown, the lower pulley 24 is driven by a drive mechanism (chain drive, gear drive, etc.). The intermediate shaft housing 19 and the pressing beam 7 are connected to each other by a male screw rod (bolt) 27 at the center of the rear portion. The male screw rod 27 simultaneously adjusts the tension of the tamming belts 31 and 32.

  5A is a perspective view of a clamping device that clamps the workpiece W, and FIG. 5B is a perspective view of a part of the clamping device. This clamping device is a device for clamping the workpiece W from both sides. The clamp device includes a linear guide block 41A, a rack 42A fixed integrally to the linear guide block 41A, and an L-shaped center clamp 44A fixed to the linear guide block 41A via a gap cover 43A. In this clamping device, a linear guide block 41B, a rack 42B integrally fixed to the linear guide block 41B, and an L-shaped center clamp 44B fixed to the linear guide block 41B via a gap cover 43B are symmetrically arranged. It consists of a pair of arrangements. Between the rack 42A of the linear guide block 41A and the rack 42B of the linear guide block 41B, a pinion 45 for driving these racks is disposed concentrically with the rotary table 20 and meshed therewith. The linear guide block 41A is fixed with an end of a histone 46a of a cylinder 46 installed in the vicinity of the linear guide block 41B via a connector 49. The cylinder 46 is fixed to the linear guide block 41B via a spacer 40.

  When the cylinder 46 is operated by the clamp device having the above configuration, the piston 46a moves, the rack 42A rotates the pinion 45, and the pinion 45 drives the rack 42B to move the linear guide block 41B. The center clamp 44A and the center clamp 44B are moved closer to each other and separated by the guide block 41A and the linear guide block 41B. Thus, when the piston 46a of the cylinder 46 is actuated in one direction, the workpiece W placed and fixed on the rotary table 20 is sandwiched, and when the piston 46a of the cylinder 46 is actuated in the reverse direction, the linear guide blocks are respectively provided. 41A and the linear guide block 41B can unpin the non-work material W, and the rotary table 20 can be driven to rotate and the work material W can be taken out.

  In short, the clamping device having the above-described configuration is a device that clamps the workpiece W from two directions on both sides during grinding. As this clamping device, a center clamp as described above is configured to be close to or away from the workpiece W direction, and a pulley and a timing belt that can rotate integrally with a rotary table described later are used. The configuration. However, if the clamp device is configured to be close to or away from the workpiece W direction from both sides by two center clamps and can be rotated integrally with the rotary table, for example, a ball screw The apparatus may have a configuration in which the two center clamps are moved closer to or away from the workpiece W.

  FIG. 6 is a detailed view around the turntable 20 on which the workpiece W is installed. As shown in this figure, the rotary table 20 is integrally rotated by a driving lower pulley 24. That is, the turntable 20 is fixed to a turntable shaft 35 fixedly disposed below the turntable 20. The lower pulley 24 for driving is disposed on the lower side of the lower pulley 24 and rotationally drives the rotary table shaft 35. The lower pulley 24 is provided with a roller gear index (rotation angle indexing device) 36 disposed on the lower side. The rotation angle can be measured with. Further, the pinion 45 is disposed around the rotary table shaft 35 through a bearing so that the pinion 45 is relatively rotated. The pinion 45 is rotationally driven by a rack 42A (see FIG. 5) driven by the cylinder 46. . The center clamps (44A, 44B) are moved left and right by the guide 47 and the rail 48 to sandwich or release the workpiece W. The upper jig 13 and the lower jig 14 can be exchanged depending on the width of the workpiece W. The description of the connection structure between the center clamp (44A, 44B) and the guide 47 is omitted.

  In the clamping part (44A, 44B) of the workpiece W of the center clamp device, a resin material is attached to the contact part (44C, 44D) that clamps the workpiece W. That is, when the clamping part (44A, 44B) of the center clamp device is applied to the workpiece W, the resin material of the contact part (44C, 44D) is slightly elastically deformed so that the workpiece plate W is clamped. . In this way, the workpiece W can be securely clamped without being damaged.

Next, the movement of the movable table 2 on which the holding beam 7 and the drive device housing 8 are mounted will be described. In this case, as shown in FIGS. 3 and 4, guides 51, 51 are fixed to the lower part of the movable table 2 so as to reciprocate on the rail 50. Although not shown in the movable table 2, the movable table 2 is reciprocated by rotationally driving a female screw fitting fixedly movable in the lower pedestal frame 1 and a ball screw screwed into the female screw fitting. It is like that.
FIG. 7 is a view taken in the direction of arrow P in FIG. 4. The workpiece W is fixed and clamped by the holding cylinder 10, the upper jig 13, the lower jig 14, and the center clamp device. It is a figure in the case of grinding both end faces in 6, 6). In this way, the spindle cutter device (6, 6) determines the width to be ground in accordance with the width of the workpiece W and moves the spindle cutter device (6, 6) in the direction of the spindle cutter device (6, 6). To do.

  As shown in FIGS. 1 and 3, reference numerals 4 and 4 denote spindle motor mounting saddles. Female screw fittings (29, 29) are attached to the spindle motor mounting saddles (4, 4), the Y-axis ball screw 33 is screwed together, and the motor 30 moves left and right symmetrically in the Y-axis direction. is there. Further, a spindle motor (5, 5) is attached to the spindle motor saddle (4, 4), and a spindle cutter device (6, 6) is attached to the spindle motors 5, 5 respectively. These spindle cutter devices (6, 6) are the same cutter, but diamond blades are mounted at intervals of 120 degrees, and these are rotated in order by changing the mounting position in the direction of the rotation axis, for example, by 0.2 mm. It is. This is to prevent “cracking” from occurring when the workpiece W is ground.

  FIG. 8 shows a method for moving the spindle cutter device (6, 6) in the Y-axis direction. That is, a method of moving the interval between the spindle cutter device 6 and the spindle cutter device 6 in accordance with the plate width of the workpiece W is shown. FIG. 8A shows a spindle motor (5) on a saddle (4, 4) provided with a guide (not shown) on the rail (52, 52) on the front surface of the cross beam 3 as shown in FIG. 1 and FIG. FIG. 5 is a view showing a cutter width adjusting device to which 5) is attached and slid in the Y direction. FIG. 8B is a diagram showing an embodiment in which a column is used in place of the cross beam 3. That is, the column (55, 55) is installed on the bed 57, the rail (53, 53) is installed on the column (55, 55), and the saddle (4, 54) provided with the guide (54, 54) is provided. 4) The spindle motor (5, 5) can be moved in the Y direction on the rails (53, 53) in accordance with the plate width of the workpiece W.

The configuration of the plate material processing apparatus of the present invention is as described above. Next, an operation procedure for actually grinding the workpiece W will be described.
(1) The ruler 18a is applied to the end surface in the X direction of the workpiece W on the ruler device 18 positioned at a position where the center of the turning table 20 and the dimension center position of the workpiece W are concentric. Is adjusted to move the end face of the ruler 18b in the Y direction, and a plurality of workpieces W for processing are placed on the lower jig 14 on the turntable 20. Further, the pressing cylinder 10 is operated to fix the workpiece W with the upper jig 13.
(2) When the cylinder 46 is operated and the rack 42A integrally fixed to the linear guide block 41A is moved together, the pinion 45 rotates and meshes with the rack 42B fixed to the linear guide block 41B. Move in the direction of clamping. That is, the workpiece W is sandwiched between the center clamp 44A and the center clamp 44B.
(3) Next, the Y-axis ball screw 33 screwed into the female screw fittings 29, 29 installed on the cross beam 3 is driven by the spindle motors 5, 5 to process the spindle cutter (6, 6). Match the width of the workpiece W.
(4) Then, the movable table 2 is moved in the direction (X direction) of the spindle cutter device (6, 6) with the workpiece W sandwiched between the center clamp 44A and the center clamp 44B, and both surfaces of the workpiece W are moved. Grind.
(5) Next, the movable table 2 is moved to the original position, the cylinder 46 is operated, and the center clamps (44A, 44B) are released from the clamping state of the workpiece W. Then, the lower pulley 24 for driving is driven, and the rotary table 20 is rotated while the workpiece W is being held by the lower jig 14 and the upper jig 13, and is rotated by the roller gear index 36. While detecting the angle, it is rotated 90 degrees (or 45 degrees), the cylinder 46 is operated again, and the workpiece W is clamped by the center clamps (44A, 44B).
(6) The Y-axis ball screw 33 screwed into the female screw fitting (29, 29) installed on the cross beam 3 is again driven by the spindle motor (5, 5) to connect the spindle cutter device (6, 6). In accordance with the width of the workpiece W to be processed, the movable table 2 is moved in the direction of the spindle cutter device (6, 6) to grind the remaining both surfaces of the workpiece W.
(7) Next, the movable table 2 is returned to the original position, and the cylinder 46 is operated to release the state in which the workpiece W is clamped by the center clamps (44A, 44B). Then, the material pressing cylinder 10 is operated to release the pressed state of the workpiece W placed between the lower jig 14 and the upper jig 13, and the workpiece W is taken out.
(8) Next, a new workpiece W is placed between the lower jig 14 and the upper jig 13 on the rotary table 20, and the material pressing cylinder 10 is operated to hold the workpiece W. And Thereafter, the above operations (2) to (7) are repeated.

  In the above configuration, in the specific embodiment, the example in which the entire holding beam 7 is placed on the moving table 2 and moved is described. However, instead of the moving table 2, this is used as a fixed table, and the spindle It is good also as a structure which provides a moving mechanism in the cross beam 3 provided with the cutter apparatus (6, 6) and moves to the turntable 20 side.

It is a top view of the processing apparatus of the board | plate material of this invention. It is a top view of the processing apparatus of the board | plate material of this invention, Comprising: It is a figure which shows the state which applied the ruler apparatus to the workpiece. It is a side view of the board | plate material processing apparatus of this invention. It is sectional drawing to which some side views of FIG. 2 were expanded. FIG. 5A is a perspective view of a clamping device portion that clamps the workpiece W, and FIG. 5B is a partial perspective view of the clamping device. It is detail drawing of the periphery of the turntable which installs the workpiece of the board | plate material processing apparatus of this invention. FIG. 4 is a view taken in the direction of arrow P in FIG. 3 and is a diagram in the case of grinding a workpiece. FIG. 8A shows a device configuration in which the spindle cutter device is moved using the cross beam when the spindle cutter device is moved according to the plate width, and FIG. 8B is a case where the cutter device is moved according to the plate width. It is a figure which shows the apparatus structure in the case of moving using a column. It is a conventional plate material processing apparatus, and is a side view of a state where workpieces are stacked and both ends are ground. It is a perspective view which shows the structure of the board | plate material installation part of the conventional board | plate material processing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base frame 2 Moving base 3 Cross beam 4 Spindle motor mounting saddle 5 Spindle motor 6 Spindle cutter device 7 Pressing beam 10 Cylinder 12 Ball spline 13 Upper jig 14 Lower jig 18 Ruler device 20 Rotary table 21 Buri 22 Buri 23 Buri 24 Buri 25 Intermediate shaft 29 Female thread bracket 31 Upper timing belt 32 Lower timing belt 33 Y-axis ball screw 35 Rotary table shaft 36 Roller gear index 41A Linear guide block 41B Linear guide block 42A Rack 42B Rack 44A Center clamp 44B Center clamp 45 Pinion 46 cylinder

Claims (4)

A material pressing drive means installed at the upper part of the pressing beam; a vertical axis provided at the lower part of the material pressing drive means; an upper jig installed at the lower end of the vertical axis; and the upper jig A rotary table installed in a downward direction, and a lower jig provided so as to rotate integrally with the central portion of the rotary table and provided with a plurality of workpieces and provided concentrically with the upper jig. A plate fixing device;
An intermediate shaft provided with an upper pulley and a lower pulley at both upper and lower ends inside a column portion formed in the longitudinal direction of the pressing beam, and an upper pulley provided concentrically with a vertical axis provided at the lower portion of the driving means A timing belt wound between the upper pulley and the upper pulley provided on the intermediate shaft and between a pulley provided below the rotary table and a lower pulley provided on the intermediate shaft. A rotary table driving device;
A ruler device that makes contact with the X-direction end face and the Y-direction end face of the workpiece;
A center clamp device configured to move the two center clamps close to or away from each other in the direction of the workpiece, and rotate integrally with the rotary table to hold the workpiece.
While being placed on a moving table,
A cross beam or column provided with two cutter devices provided with moving means for moving at an arbitrary interval in a direction perpendicular to the moving table and provided with driving means,
A plate material processing apparatus in which the movable table is reciprocally movable in the two cutter directions. A material pressing drive means installed at the upper part of the pressing beam; a vertical axis provided at the lower part of the material pressing drive means; an upper jig installed at the lower end of the vertical axis; and the upper jig A rotary table installed in a downward direction, and a lower jig provided so as to rotate integrally with the central portion of the rotary table and provided with a plurality of workpieces and provided concentrically with the upper jig. A plate fixing device;
An intermediate shaft provided with an upper pulley and a lower pulley at both upper and lower ends inside a column portion formed in the longitudinal direction of the pressing beam, and an upper pulley provided concentrically with a vertical axis provided at the lower portion of the driving means A timing belt wound between the upper pulley and the upper pulley provided on the intermediate shaft and between a pulley provided below the rotary table and a lower pulley provided on the intermediate shaft. A rotary table driving device;
A ruler device that makes contact with the X-direction end face and the Y-direction end face of the workpiece;
A center clamp device configured to move the two center clamps close to or away from each other in the direction of the workpiece, and rotate integrally with the rotary table to hold the workpiece.
Place it on the fixed base,
A cross beam or column provided with two cutter devices provided with a moving means for moving at an arbitrary interval in a direction perpendicular to the fixed base and provided with a driving means,
A plate material processing apparatus capable of reciprocating the two cutters in a fixed base direction.     The clamp device includes a linear guide block, a rack integrally fixed to the linear guide block, and an L-shaped center clamp fixed to the linear guide block. 3. The plate material processing apparatus according to claim 1, wherein the plate material processing apparatus is a set of two clamping devices that are meshed and symmetrically arranged and provided with a drive means for one linear block and arranged around the rotary table.   Between an intermediate shaft housing that accommodates an intermediate shaft in which an upper pulley and a lower pulley arranged at both upper and lower ends are fixed inside a column portion formed in the vertical direction of the pressing beam, and the column portion of the pressing beam. The plate material processing apparatus according to claim 1, further comprising a male screw rod which is connected to fix the intermediate shaft housing and allows the tension of the timing belt to be adjusted.

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