JP2002346988A - High-speed cnc punching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-speed CNC punching device capable of shortening the time of continuously punching through holes in a green sheet for a multi- layered board, and easily positioning the green sheet for cutting the green sheet at each array pattern. SOLUTION: One punch for each array pattern of a plurality of through holes punched in the green sheet is provided on an upper die, a punching head with this upper die mounted thereon is elevated/lowered by a crank mechanism, a work head with the green sheet fitted thereto and holding a pallet sliding on an upper surface of a lower die is NC-positioned in the X-axis direction and the Y-axis direction, a stripper stretched over a base in an elevating/ lowering manner is lowered, and the punching by the punch and the NC- positioning of the green sheet are repeated while holding the green sheet with a small space between the stripper and the lower die.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a through hole of a green sheet for a multi-layer substrate in which a plurality of minute through holes are formed in the same arrangement pattern and the arrangement pattern is arranged at the same arrangement pitch. CNC to drill
The present invention relates to a punching device.

[0002]

2. Description of the Related Art As a general manufacturing method, a multi-layer board used as an electronic circuit board used in a high-performance computer is formed by forming a through hole called a through hole in a green sheet, applying printed wiring, and laminating the green sheet. Manufactured by sintering. Conventionally, as a method of forming a through hole in a green sheet of the multilayer substrate, cutting with a drill, processing with an electron beam, punching with a punch and a die, and the like have been considered. Most popular because of high productivity. As a method of punching through holes in a green sheet for a multilayer substrate, a set of punches and dies is provided at the same position in each of a plurality of unit patterns, and the green sheet is moved vertically and horizontally according to the position of each through hole in the unit pattern. Japanese Patent Laid-Open No. 5-169424 discloses a method for simultaneously punching holes in all unit patterns while performing the above operations.

[0003]

In the above-described conventional method for punching a green sheet for a multilayer substrate, the green sheet is sandwiched between a stripper and a die biased by a spring force during punching with a punch. Therefore, the stripper must be moved up and down in conjunction with the lifting and lowering of the punch, and it has been difficult to shorten the cycle of the lifting and lowering cycle of the punch to increase the processing efficiency. In addition, if the lifting cycle of the punch is increased to increase the processing efficiency, there is a problem that the punch misses the defective processing such as the punching of the green sheet before the movement of the green sheet to the punching position of the next through hole is completed. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problem, and a punching method is employed in which a stripper is held at a processing end position for guiding a green sheet with a small gap between the green sheet and a lower die. By repeatedly performing the punching process and the NC positioning of the green sheet, it is possible to dramatically increase the processing cycle.

[0005]

In order to solve the above-mentioned problems, an arrangement pattern of a plurality of through holes is used as a unit, and the plurality of arrangement patterns are formed at the same arrangement pitch. High-speed C to be installed
In an NC punching apparatus, an upper die provided with a punch, a lower die provided with a die on a flat upper surface corresponding to the punch of the upper die, and clamped on a base, and a lower die mounted on the base. A punching head which is mounted so as to be able to advance and retreat in the Z-axis direction and has an upper die attached to the lower surface thereof, and which is connected to the punching head via a crank mechanism or a cam mechanism and is rotatably supported on the base above the punching head. A drive shaft rotated by an apparatus, and X and Y mounted on the base so as to be movable in a horizontal plane in X and Y axis directions orthogonal to each other.
A work head driven by an axis servomotor, a work head position detecting device for detecting a position of the work head in the X and Y directions, and a green sheet detachably mounted and held at the tip of the work head, A pallet that slides on the upper surface of the lower mold, and a pallet that is mounted on the base so as to be able to ascend and descend between the lower mold and the upper mold, and that is between a lower position and the lower mold that allows passage of the pallet. And a stripper which is moved by a lifting / lowering device between a lower position and a lower position where the green sheet is sandwiched with a small gap attached to the green sheet.

According to a second aspect of the present invention, a plurality of through holes are formed in a green sheet in which a plurality of through holes are arranged at the same arrangement pitch in units of an arrangement pattern of a plurality of through holes. A high-speed CNC punching apparatus, wherein an upper die having one punch in each unit array pattern at the same array pitch as the array pitch of the unit array pattern, and a die corresponding to the upper die punch on a flat upper surface. Provided with a lower die, which is clamped on a base, a punching head mounted on the base so as to be able to advance and retreat in the Z-axis direction toward the lower die, and an upper die mounted on a lower surface, and a crank mechanism attached to the punching head. Alternatively, a drive shaft connected via a cam mechanism, supported on the base above the punching head, and rotated by a rotary drive device, and directly mounted on the base. A work head mounted to be movable in a horizontal plane in the X and Y axis directions and driven by an X and Y axis servomotor, and a work head position detecting device for detecting the position of the work head in the X and Y axis directions A pallet on which a green sheet is detachably attached and held at the tip of the work head and slides on the upper surface of the lower die, and mounted on the base so as to be able to move up and down between the lower die and the upper die. A stripper that is moved by a lifting device between a lower position where the green sheet attached to the pallet is held with a small gap between the lower position where the pallet is allowed to pass and the lower mold; That is.

According to a third aspect of the present invention, in the high-speed CNC punching device according to the first or second aspect, the crank shaft or the cam mechanism is rotated by rotating a drive shaft by the rotary driving device. The punching head is lowered to a processing position near a lower end through the punch, a through hole is formed in the green sheet by a punch, and it is detected that the punching head is raised from the processing position and the punch is detached from the green sheet. A detachment detecting device and the X, Y axis servomotors are driven based on the detachment detection by the detachment detecting device to move the work head to a next command position facing a through hole where a punch is punched next to the green sheet. And a control device for NC positioning.

According to a fourth aspect of the present invention, in the high-speed CNC punching apparatus according to the third aspect, after the work head is NC-positioned to a next command position, the punching head is moved to the processing position. A confirmation position detection device that detects passage of a confirmation position above,
When the confirmation position detecting device detects that the punching head has passed the confirmation position, it confirms whether or not the output of the coordinate position detecting device for detecting the coordinate positions of the X and Y axes of the work head matches the next command position. That is, a confirmation means is provided.

According to a fifth aspect of the present invention, in the high-speed CNC punching apparatus according to any one of the first to fourth aspects, an auxiliary punch for forming an auxiliary hole for positioning the green sheet is provided. The auxiliary punching head provided is provided on the base alongside the punching head, and the auxiliary punching head is moved in the Z-axis direction by a cylinder device toward an auxiliary die provided on the base in opposition to the auxiliary punch. This is to move forward and backward.

[0010]

According to the first aspect of the present invention, a punch is provided on the upper die, and the punching head to which the upper die is attached is moved up and down by a crank mechanism or a cam mechanism, so that the green sheet is formed. The work head holding the pallet that is mounted and slides on the upper surface of the lower mold is NC-positioned in the X and Y axes directions, and the stripper mounted on the base is lowered so as to be able to move up and down so that the green sheet can be moved to the lower mold. The punching and punching of the green sheet and the NC positioning of the green sheet are repeated with a small gap between them, so that the stripper does not need to be moved up and down for each cycle of moving up and down the upper die. By shortening the cycle period, the processing time can be drastically reduced.

In the invention according to claim 2 configured as described above, one punch is provided in the upper die at each arrangement pattern at the same pitch as the arrangement pitch of each arrangement pattern of through holes formed in the green sheet. , The punching head with the upper mold attached is raised and lowered by the crank mechanism,
The work head that holds the pallet with the green sheet attached and slides on the upper surface of the lower mold is NC-mounted in the X and Y-axis directions.
Positioning, lowering the stripper mounted on the base so as to be able to move up and down, and holding the green sheet with a small gap with the lower mold, punching with a punch and NC positioning of the green sheet. I tried to repeat,
There is no need to raise and lower the stripper every time the upper die is moved up and down, so that the cycle of the upper die can be shortened and the processing time can be drastically reduced by simultaneously processing a plurality of patterns. .

According to the third aspect of the present invention, the driving shaft is rotated by the rotary driving device, and the punching head is moved down to the machining position near the lower end through the crank mechanism or the cam mechanism, and the punch is driven. A through hole in the green sheet, and drives the X and Y axis servomotors based on the release signal generated when the punching head is lifted from the processing position and the punch is released from the green sheet to drive the work head. Since the punch is NC-positioned at the next command position facing the through hole of the green sheet, the punching head which moves up and down at a high speed by the crank mechanism or the cam mechanism rises and the work head is NC after the punch comes off the green sheet. A plurality of through holes can be continuously processed at high speed by positioning.

According to the fourth aspect of the present invention, after the work head is NC-positioned to the next command position, the punching head is positioned at the confirmation position above the machining position, and the confirmation position detecting device. When the confirmation position signal is output from the controller, it is confirmed whether or not the output of the coordinate position detecting device for detecting the coordinate position of the X and Y axes of the work head coincides with the next command position. It is possible to prevent or detect an abnormality in which the punching head descends to the processing position before the work head is positioned at the next command position opposite to the through hole to be processed next to the sheet and the punch performs the punching process.

In the invention according to claim 5 configured as described above, the auxiliary punching head provided with the auxiliary punch for forming the auxiliary hole for positioning the green sheet is provided on the base alongside the punching head. The auxiliary punching head is moved forward and backward in the Z-axis direction by the cylinder device toward the auxiliary die. Therefore, once the green sheet is attached to the work head via the pallet, the green sheet is formed together with the processing of a plurality of through holes. An auxiliary hole for positioning the sheet can be formed at an accurate position with respect to the arrangement pattern, and the green sheet can be accurately cut for each arrangement pattern.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 denotes a high-speed CNC punching apparatus, which is used to form a plurality of through hole arrangement patterns at the same pitch on a green sheet.

The main components of the high-speed CNC punching device 10 are, as shown in FIGS.
An X-axis table 14, a Y-axis table 15, crank type punching units 16 and 18, and a cylinder driving punching unit 17. Further, a numerical controller 125 and a vacuum device (not shown) are arranged adjacent to the high-speed CNC punching device 10.

The base 11 is a substantially rectangular table, and has six bar-shaped legs 12 that stand upright on the floor, projecting from the lower surface, and the floor 11 is set at a height that can be reached by an operator in a standing state. It is supported horizontally with the surface. An anti-vibration pad 21 is attached to the tip of the leg 12 that comes into contact with the floor surface to prevent vibration generated from the high-speed CNC punching device 10 and vibration transmitted from the floor surface to the high-speed CNC punching device 10. 13 is reverse U
The front surface 22 and the rear surface 23 are connected at a predetermined interval by welding with a fixed plate 19 at the upper and lower sides while maintaining a predetermined interval. The lower end of both sides of the frame 13 is the base 11.
It is fixed to the upper surface by bolts on the front side of the machine. A carry-in / out table 59 is attached to the front of the base 11 on the front side of the frame 13 at the same height as the lower mold 41 and the die plate 84 described later. 1 and 3, the left-right direction is the Y-axis direction of the high-speed CNC punching 10, and the axis orthogonal to the Y-axis in the horizontal direction is the X-axis, and the axis orthogonal to the X-axis and the Y-axis is the Z-axis.

As shown in FIGS. 2 and 4, at the center of the horizontal portion of the frame 13, a cylinder driving punching portion 17 for forming a positioning hole or the like in the green sheet 60 is mounted. A cylinder driving punching unit 1 is provided on a base 11.
7, a die plate 84 is fixed. Dies 85 and 86 are fitted to the die plate 84,
Dies 85 and 86 are provided with punch holes 87 and 88. Below the punch holes 87 and 88, air blow holes 95,
96 are provided, and vacuum holes 97 and 9 are further provided below.
8 are provided. The cylinder driving punching section 17 is provided with two auxiliary punch units 36 and 37. Punching rods 24 as auxiliary punching heads are attached to guide members 26 and 27 fixed to the frame 13.
25 is supported slidably in the Z-axis direction, and auxiliary punches 28 and 29 are detachably fixed to the tips of the punching rods by fixtures 91 and 92. Punching rod 2
Cylindrical strippers 38 and 39 made of an elastic member are fixed to the tips of the auxiliary punches 28 and 29 at the tips of the auxiliary punches 28 and 29 by covering the outer periphery of the auxiliary punches 28 and 29. It extends slightly below the tip of 29.

As shown in FIGS. 2 and 5, crank type punching portions 16 and 18 are attached to both sides of the frame 13. In the crank type punching unit 16, the base 11
The lower mold plate 54 is fixed thereon by bolts, and the lower mold 41 is placed on the lower mold plate 54 and fixed by bolts. As shown in FIG. 9, the lower die 41 has a die hole 6 for guiding the punch 63 corresponding to the punch 63 described later.
A plurality of dies 65 provided with 6 are provided. Further, each die 65 is provided with a vacuum hole 61 and an air blow hole 62. A stripper 42 is provided above the lower die 41. As shown in FIGS. 5 and 7, guide pins 67 and 6 projecting upward from both upper surfaces of the stripper 42 are provided.
8 is fitted to the punching head 44. Air cylinders 4 as lifting devices are provided at both ends of the horizontal portion of the frame 13.
The upper ends of the connecting members 31, 33 connected to both ends of the stripper 42 are connected to piston rods to which the lower members 5, 46 are fixed and project below the air cylinders 45, 46. Lower ports 109 and 110 and upper ports 111 and 112 are provided at upper and lower ends of the air cylinders 45 and 46, respectively. Lower end positioning portions 113 and 114 are formed at the upper end portions of the connecting members 31 and 33, respectively.
Stop members 13 and 114 fixed to fixing plate 19
The strippers 42 are positioned at the lowered position by contacting the strippers 15 and 116. Connecting member 3
Spacers 11 are provided between the upper and lower portions of
7 and 118 are interposed, and by adjusting the thickness of the spacers 117 and 118, the stripper 4 positioned at the lowered position is formed.
The gap between the lower surface of the lower mold 2 and the upper surface of the lower mold 41 is adjusted. As shown in FIGS. 9 and 12, the stripper 42 is provided with a guide hole 64 corresponding to each punch 63 for guiding and passing each punch 63 through a minute gap.

Above the stripper 42, an upper die 43 is attached to a punching head 44 and fixed by bolts. The upper die 43 is provided with punches 63 for punching one small diameter through hole in each array pattern at a predetermined pitch. A guide rod 4 for guiding the vertical movement of the punching head 44 is provided on the horizontal portion of the frame 13.
7 and 48 are fixed downward in the Z-axis direction inside the air cylinders 45 and 46. Bushes 55 and 56 provided on the upper surfaces of both ends of the punching head 44 in the Z-axis direction are fitted with the guide rods 47 and 48, and the punching head 44 is
Are guided in the Z-axis direction. Guide rod 4
7, a circular plate 120 fixed to the lower end of
Compression springs 57, 58 are interposed between 121 and lower ends of the bushes 55, 56, respectively, to support the load of the punching head.

On a horizontal portion of the frame 13, a crankshaft 53 as a drive shaft is rotatably supported by bearings 82 and 83 in the Y-axis direction between guide rods 47 and 48. An upper end of a connecting shaft 51 is connected to an eccentric shaft 52 provided at a tip of a crankshaft 53 by a bearing 81.
The lower end of 1 is connected to a punching head 44 via a bearing 100. The crankshaft 53 is connected to an output shaft of a Z-axis servomotor 72 as a rotary drive fixed to the rear surface 23 of the frame 13. Reference numeral 73 denotes a rotary encoder connected to the Z-axis servo motor 72, which transmits a detection signal for detecting the position of the punching head 44 in the Z-axis direction. The drive shaft rotated by the rotary drive device is thus supported above the punching head 44, and the punching head 4 is rotated via a crank mechanism.
4. Reference numeral 18 denotes a crank-type punching unit disposed on the left side of the frame 13, which has the same configuration as the above-described crank-type punching unit 16, and a detailed description thereof will be omitted.

As shown in FIGS. 1 and 3, X
An axis table 14 and a Y-axis table 15 are provided movably in the X-axis and Y-axis directions. Lower surface 4 of X-axis table 14
A linear guide slider is fixed to the corner, and the slider is slidably mounted on a pair of rails 101 and 102 extending in the X-axis direction behind the frame 13 and fixed to the upper surface of the base 11. ing. Reference numeral 105 denotes a ball screw extending between the rails 101 and 102 in the X-axis direction and rotatably supported on the base 11 and connected to an X-axis servomotor 74 fixed to the base 11. A nut fixed to the lower surface of the X-axis table 14 is screwed into the ball screw 105. 107 is a bearing for supporting the free end of the ball screw 105. Reference numeral 75 denotes a rotary encoder connected to the X-axis servo motor 74, which sends out a detection signal for detecting the position of the X-axis table 14 in the X-axis direction.

At four corners of the upper surface of the X-axis table 14, sliders of linear guides for guiding the rails 103, 104 in the Y-axis direction are fixed, and the rails 103, 104 are fixed to the lower surface of the Y-axis table 15. . 106 is rail 1
A ball screw extending in the Y-axis direction above the Y-axis table 15 between 03 and 104 and rotatably supported on the base 11 is connected to a Y-axis servomotor 77 fixed to the base 11. ing. The ball screw 106 has a Y-axis table 15
A nut 119 fixed to the upper surface of the nut is screwed. 10
Numeral 8 denotes a bearing for supporting the free end of the ball screw 106, which penetrates a long hole formed in the Y-axis table in the Y-axis direction and projects above the Y-axis table 15. Reference numeral 77 denotes a rotary encoder connected to the Y-axis servomotor 76, which sends out a detection signal for detecting the position of the Y-axis table 15 in the Y-axis direction. At the front end of the Y-axis table 15, a clamping device 7 for detachably clamping a pallet 71 to which a green sheet 60 as a work is attached.
8 is provided. 80
Is an air cylinder fixed above the work head 79, which raises and lowers the connecting pin of the clamp device 78.

As shown in FIGS. 10 and 11, the pallet 71 has a structure in which two thin metal plates each having a substantially square shape are stacked and bonded. In this embodiment, a 0.6 mm stainless steel plate 89 is provided on the upper side. , 0.5 mm stainless steel plate 9 on the lower side
0 is used. The center of the pallet 71 is cut out in a substantially square shape, and the lower stainless steel plate 90 is provided with a protrusion 99 on which the green sheet 60 is placed. Further, the clamp device 7 connected to the work head 79
8, connecting portions 69 and 70 having a predetermined thickness are provided.

Next, the operation of the high-speed CNC punching device 10 configured as described above will be described. In the processing start state, the work head 79 is set in the loading / unloading table 59.
, The punching head 44 and the punching rods 24 and 25 are stopped at the rising end, and the strippers 38 and 39 are raised to the rising position. An operator places the green sheet 60 on the protrusion 99 of the pallet 71 and fixes it to the pallet 71 with a tape or the like. Next, the pallet 71 is placed on the loading / unloading table 59, the connecting portions 69 and 70 are inserted into the clamping device 78 of the work head 79, and the connecting pins of the clamping device 78 are lowered by the air cylinder 80, so that the connecting portion 6 of the pallet 71 is
Clamp 9,70. Next, when the start button is pressed, the numerical controller 125 executes the control program 130 shown in FIG. 13, and the high-speed CNC punching device 10 is automatically operated.

First, the numerical controller 125 drives the X and Y axis servomotors 74 and 76 to move the X and Y axis tables 14 and 15, and moves the work head 79 to the auxiliary punch 29 of the auxiliary punch unit 37. Are NC-positioned at a command position facing a reference hole punched in the green sheet 60 (step 131). When the NC positioning of the work head 79 is completed, the punching rod 25 is lowered by the air cylinder 35, and the lower end of the stripper 39 elastically presses the green sheet 60 placed on the pallet 71 against the upper surface of the die plate 84. Thus, a reference hole is formed in the green sheet 60 by the auxiliary punch 29. The punch dust generated by the punching of the green sheet 60 by the auxiliary punch 29 is conveyed by the flow of air in the die 86 into which the air supplied from the air blow hole 96 is sucked into the vacuum hole 98 and is sucked out from the vacuum hole 98 to the outside. Is discharged. After drilling the reference hole, the punching rod 25 is retracted to the rising end by the air cylinder 35. Similarly,
The NC positioning of the work head 79 by the X and Y axis servomotors 74 and 76 and the lifting and lowering of the auxiliary punch 29 by the air cylinder 35 are repeated to form reference holes in necessary portions of the green sheet 60 (step 132).

When the drilling of the reference holes is completed, the content N of the counter indicating the number of drilled through holes is set to 1 (step 133). Next, the first NC data is read, the X-axis and Y-axis servo motors 74 and 76 are rotationally driven, the X and Y-axis tables 14 and 15 are moved, and the work head 79 is moved to the first position of the green sheet 60. The NC positions of the through holes punched out at the first command position opposing the punches 63 (step 134). At this time, the pallet 71 is clamped by the work head 79 at the connecting portions 69, 70, slides on the upper surface of the lower die, moves to the crank-type punching portion 16, and is positioned at the first command position. When the work head 79 is positioned at the first command position, the stripper 42 is lowered by the air cylinders 45 and 46, and the descent end positioning portions 113 and 114 are stopped by the stop member 1.
The stripper 42 is positioned at the lowered position by contacting the strips 15 and 116 (step 135). At the lowered position, as shown in FIG. 8, the lower surface of the stripper 42 slightly presses the green sheet downward, and a small gap of about 0.05 mm is formed between the lower surface of the lower mold 41 and the green sheet 60. Is sandwiched.

In this state, the Z-axis servomotor 72 is started (step 136), the crankshaft 53 is rotated, the punching head 44 is lowered by the eccentric shaft 52 via the connecting shaft 51, and the machining position near the lower end is set. With each punch 63
Are formed in the green sheet 60 through the respective guide holes 64 of the stripper 42 to form first through holes. Punch dust generated by punching of a green sheet by the punch 63 is discharged to the vacuum hole 61 through the die hole 66 provided in each die 65, and is carried by the airflow blown out from the air blow hole 62 to the vacuum hole. It is sucked and discharged from 61 outside.

After the first through hole is formed, the punching head 44 is rotated by the rotation of the Z-axis servomotor 72.
Rises from the processing position, and each punch 63 comes out of the die hole 66 and separates from the green sheet 60. Each punch 63
When the punching head 44 rises to a position where the punching head 44 is separated from the green sheet 60, the numerical control device 1 takes in a detection signal from the rotary encoder 73 for detecting the position of the punching head 44 in the Z-axis direction at short time intervals.
25 internally generates a detachment signal indicating that the detection signal of the rotary encoder 73 has exceeded the set value and each punch 63 has detached from the green sheet 60 (step 137). The rotary encoder 73 and the numerical controller 125 executing the step 137 of the control program constitute a detachment detecting device 126 for detecting that the punching head 44 has risen from the processing position and each punch 63 has detached from the green sheet 60. .

The numerical controller 125 reads the next NC data based on the detection of the detachment, drives the X and Y axis servomotors 74 and 76 to move the X and Y axis tables 14 and 15, and The NC position 79 is NC-positioned to the next command position where each punch 63 faces the through hole punched next to the green sheet 60 (step 138).

While the X-axis and Y-axis tables 14 and 15 are moving, the crankshaft 53 is driven to rotate by the Z-axis servomotor, and the punching head 44 is raised. After the work head 79 is NC-positioned at the next command position,
When the punching head 44 has passed the confirmation position above the processing position, the numerical controller 125 determines that the detection signal from the rotary encoder 73 has become a predetermined value or less, and the punching head 44 has passed the confirmation position above the processing position. Is detected (step 139). The rotary encoder 73 and the numerical control device 125 executing the step 139 of the control program constitute a confirmation position detection device 127 for detecting that the punching head 44 has passed the confirmation position above the processing position.

When the passage of the confirmation position is detected, the numerical controller 125 which takes in detection signals from the rotary encoders 75 and 77 for detecting the positions of the work head 79 in the X and Y axes at short time intervals is used. It is checked whether or not the detection signals of the rotary encoders 75 and 77 match the next command position, that is, whether or not the positioning of the work head 79 to the next command position has been completed (step 140).
If not completed, the high-speed CNC punching device 10 is abnormally stopped (step 141). A coordinate position detecting device 128 for detecting the X and Y axis coordinate positions of the work head 79 is constituted by the rotary encoders 75 and 77, and punching is performed by the rotary encoders 75 and 77 and the numerical control device 125 executing the step 138 of the control program. When it is detected that the head 44 has passed the confirmation position, a confirmation means 129 is configured to check whether or not the output of the coordinate position detection device 128 matches the next command position.

When it is confirmed that the work head 79 has been positioned at the next command position when the punching head 44 has passed the confirmation position, the punching head 44 is lowered as the crankshaft 53 rotates, and the machining position is reduced. Then, each punch 63 forms a second through hole in the green sheet 60. The content N of the counter indicating the number of drilled through holes is the number N of through holes in the array pattern.
It is checked whether it is equal to n (step 142). If not, 1 is added to the content N of the counter (step 14).
3) Thereafter, steps 137 to 143 are repeated in the same manner to form all through holes in the array pattern.

When all the through holes of the array pattern have been formed in the green sheet 60 and the detection signal from the rotary encoder 73 detects that the punching head 44 has risen to the rising end (step 144), the stripper 42 is used. Is retracted to the raised position by the air cylinders 45 and 46, the Z-axis servomotor 72 is stopped, and the punching head 44 is stopped at the raised end (step 145). When the stripper 42 retreats to the ascending position and the punching head 44 stops at the ascending end, the numerical controller 125 positions the work head 79 at the work carry-in / out position (step 146). Thereafter, the operator presses the unclamping button, raises the connecting pin of the clamping device 78 by the air cylinder 80, disengages the pallet 71 from the connecting portions 69, 70, and removes the green sheet 60 from the pallet. The green sheet 60 in which the through holes are formed is positioned by a cutting machine using the reference holes, and is cut for each arrangement pattern.

When two types of through-holes are formed in the green sheet 60, one type of through-hole is formed in the crank-type punching unit 16, and the other type of through-hole is formed in the green sheet 60 as described above. Drill through holes of diameter.

When two types of reference holes or a reference hole and a discriminating hole are to be formed in the cylinder driving punching section 17, one of the diameter reference holes is formed by the auxiliary punch unit 35 as described above, and the other is formed. A reference hole or an identification hole having a diameter of 3 mm is formed by the auxiliary punch unit 36.

In the above embodiment, the frame 13
Although two auxiliary punch units 36 and 37 are provided at the center, three or more auxiliary punch units may be provided as needed.

In the above embodiment, the punching head 4
4 is connected to a rotationally driven drive shaft via a crank mechanism and is moved up and down. However, as shown in FIG. 14, the punching head 44 is connected to the drive shaft via a cam mechanism so that the punching head 44 is moved. It may be raised and lowered. That is, a drive shaft 153 is rotatably mounted on the horizontal portion of the frame 13 above the punching head 44 so as to be rotatable around the Y axis in the middle of the guide rods 47 and 48, and a rear end of the drive shaft 153 is for a Z axis as a rotary drive device. It is connected to the output shaft of the servo motor 72. A cam plate 148 is fixed to the tip of the drive shaft 153, and a groove cam 151 is formed on the end face of the cam plate 148. A guide 152 provided on the frame 13 above the punching head 44 includes:
The connection shaft 150 is supported so as to be slidable in the vertical direction.
A follower roller 149 that engages with the groove cam 151 is rotatably supported at the upper end of the connection shaft 150, and the punching head 44 is connected to the lower end. When the groove cam 151 rotates and the descending portion having a large lift amount rotates downward,
The press head 44 descends, and a through hole is punched into the green sheet 60 by the punch 63. Groove cam 15
The press head 44 stops at the rising end where the punch 63 separates from the green sheet 60 while the arc-shaped rising portion having a small lift amount rotates downward by the rotation of 1 and contacts the follower roller 149. Therefore, by increasing the length of the arc-shaped rising portion of the groove cam 148, it is possible to increase the rate at which the press head 44 stops at the rising end position in one rotation of the groove cam 148, thereby increasing the processing efficiency. Even if the cycle of the vertical movement cycle of the press head 44 is shortened, it is possible to sufficiently secure the time required for NC positioning of the work head 79 to the next command position. The operation is the same as that of the above-described embodiment except that the press head 44 is moved up and down by a cam mechanism instead of a crank mechanism, and thus the description is omitted.

Further, in the above embodiment, the green sheet 6 in which a plurality of arrangement patterns are arranged at the same arrangement pitch with the arrangement pattern of a plurality of through holes as a unit.
In order to simultaneously process a plurality of array patterns of 0, one punch 63 is provided in the upper die 43 for each unit array pattern at the same array pitch as the array pitch of the unit array pattern. One punch 63 may be attached, and through holes may be formed sequentially in a plurality of arrangement patterns.

[Brief description of the drawings]

FIG. 1 is a side view of a high-speed CNC punching device according to the present invention.

FIG. 2 is a front view of a high-speed CNC punching device according to the present invention.

FIG. 3 is a plan view of a high-speed CNC punching device according to the present invention.

FIG. 4 is a partial cross-sectional view of the auxiliary punching station as viewed from the front.

FIG. 5 is a partial sectional view of the punching station as viewed from the front.

FIG. 6 is a partial cross-sectional view of the punching station as viewed from the side.

FIG. 7 is a partial cross-sectional view of a component for raising and lowering the stripper.

FIG. 8 is a view showing a state where a stripper holds a green sheet with a small gap between the green sheet and the upper surface of a lower mold.

FIG. 9 is a partial cross-sectional view showing a relationship among an upper die, a punch, a stripper, and a die of a punching station.

FIG. 10 is a plan view of a pallet.

FIG. 11 is a side view of the pallet.

FIG. 12 is a diagram showing a relationship between a lower mold, a green sheet, and a stripper.

FIG. 13 is a flowchart showing a control program of the high-speed CNC punching device.

FIG. 14 is a view showing a cam mechanism for raising and lowering a punching head.

[Explanation of symbols]

10 High-speed CNC punching device, 11 Base, 13 Frame, 14 X-axis table, 1
5 ... Y axis table, 16, 18 ... Crank type punching unit, 17 ... Cylinder drive punching unit, 2
4, 25 ... punching rod (auxiliary punching head), 26, 27 ... guide member, 28, 29 ... auxiliary punch, 31, 33 ... connecting member, 34, 35 ...
· Air cylinders, 36, 37 ··· auxiliary punch unit, 38, 39 ··· stripper (of auxiliary punch unit), 40 ··· small gap, 41 ··· lower mold, 42 ···
· Stripper, 43 · · · upper die, 44 · · · punching head, 45, 46 · · · air cylinder, 47, 48 ·
..Guide rods, 51 ... Connection shaft, 52 ... Eccentric shaft (Crank mechanism together with connection shaft), 53 ... Crank shaft (drive shaft), 54 ... Lower plate, 55,5
6 bush, 57, 58 compression spring,
59 ... loading / unloading table, 60 ... green sheet, 63 ... punch, 64 ... guide hole, 65 ...
・ Die, 66 ・ ・ ・ Die hole, 67, 68 ・ ・ ・ Guide pin, 69, 70 ・ ・ ・ Connecting part, 71 ・ ・ ・ Pallet, 7
2,74,76 ... X, Y, Z axis servo motor, 7
3, 75, 77 ... rotary encoder, 78 ...
・ Clamping device, 79 ... Work head, 80 ...
Air cylinder (of work head), 84 ... die plate, 85, 86 ... die, 87, 88 ... punch hole, 101, 102, 103, 104 ... linear guide rail, 105, 106 ... Ball screws, 10
9, 110: lower port, 111, 112: upper port, 113, 114: lower end positioning portion, 1
15, 116 ... stop member, 125 ... numerical control device, 126 ... detachment detection device, 127 ... confirmation position detection device, 128 ... coordinate position detection device, 129
... Confirmation means, 130 ... Control program, 149
... follower roller, 150 ... connecting shaft, 151
..Groove cams (constituting a cam mechanism with follower rollers, connecting shafts, etc.), 153... Drive shafts.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Nakamura 1-2 Koshimae, Kamishiehara-cho, Chiryu-shi, Aichi Prefecture Inside Toyohitei Tech Co., Ltd. (72) Inventor Hideyuki Matsubara 2-73 Ogihigashi, Komaki-shi, Aichi Prefecture F term in Seiki Co., Ltd. (reference) 3C060 AA11 BA01 BB12 BD01 BE07 BG11 4G055 AA08 AC01 BA63 BA83

Claims (5)

[Claims] 1. A high-speed CNC punching apparatus for punching a plurality of through holes of a green sheet in which a plurality of through holes are arranged at the same arrangement pitch in units of an arrangement pattern of a plurality of through holes, wherein a punch is provided. An upper die, a lower die which is provided on a flat upper surface with a die corresponding to the punch of the upper die, and which is clamped on a base, and mounted on the base so as to be able to advance and retreat in the Z-axis direction toward the lower die. A punching head that is suspended and the upper die is attached to the lower surface, a drive shaft that is connected to the punching head via a crank mechanism or a cam mechanism, is supported by the base above the punching head, and is rotated by a rotary driving device, A work head mounted on the base so as to be movable in a horizontal plane in X and Y axis directions orthogonal to each other and driven by an X and Y axis servomotor; A work head position detecting device for detecting the positions of the heads in the X and Y axis directions, a pallet which is detachably attached to a green sheet and is held at the tip of the work head and slides on the upper surface of the lower mold; A green sheet attached to the pallet between a lower position and an ascending position which is mounted on the base so as to be able to ascend and descend between the mold and the upper mold and allows the passage of the pallet with a minute gap. A high-speed CNC punching device comprising a stripper which is moved by an elevating device between a lower position to be clamped. 2. A high-speed CNC punching apparatus for piercing a plurality of through-holes of a green sheet in which a plurality of arrangement patterns of a plurality of through-holes are arranged at the same arrangement pitch in units of an arrangement pattern of the plurality of through-holes. An upper die in which one punch is provided in each unit array pattern at the same arrangement pitch as that of the upper die, and a die is provided on a flat upper surface corresponding to the punch of the upper die and is clamped on a base. Mold and Z to the base toward the lower mold
A punching head mounted so as to be able to advance and retreat in the axial direction and having an upper die attached to a lower surface thereof; connected to the punching head via a crank mechanism or a cam mechanism; A drive shaft, a work head mounted on the base so as to be movable in a horizontal plane in X and Y axis directions orthogonal to each other, and driven by an X and Y axis servomotor; A work head position detecting device for detecting a position in the Y-axis direction, a pallet on which a green sheet is removably mounted and held at the tip of the work head and slides on the upper surface of the lower mold; and the lower mold and the upper mold. The green sheet attached to the pallet is placed between the lower position and the lower position where the green sheet is mounted on the base so as to be able to ascend and descend so as to allow passage of the pallet. Fast CNC punching apparatus characterized by comprising a stripper which is moved by a lifting device between a lowered position for clamping a. 3. The high-speed CN according to claim 1 or 2,
In the C punching device, the drive shaft is rotated by the rotary driving device, the punching head is lowered to a processing position near the lower end through the crank mechanism or the cam mechanism, and a through hole is formed in the green sheet by punching. And a detachment detecting device for detecting that the punching head has risen from the processing position and the punch has detached from the green sheet, and driving the X, Y axis servomotor based on the detachment detection by the detachment detecting device. A high-speed CNC punching device, comprising: a control device for NC-positioning a work head at a next command position facing a through hole where a punch is punched next to the green sheet. 4. The high-speed CNC punching apparatus according to claim 3, wherein said work head is moved to a next command position by NC.
After being positioned, a confirmation position detection device that detects that the punching head has passed a confirmation position above the processing position, and a work position of the work head when the confirmation position detection device detects the passage of the confirmation position of the punching head. A high-speed CNC punching device comprising a checking means for checking whether an output of a coordinate position detecting device for detecting coordinate positions of X and Y axes coincides with the next command position. 5. The high-speed CN according to claim 1, wherein:
In the C punching device, an auxiliary punching head provided with an auxiliary punch for forming an auxiliary hole for positioning the green sheet is provided on the base alongside the punching head, and the auxiliary punching head is provided with an auxiliary punch. A high-speed CNC punching apparatus characterized in that the cylinder apparatus moves forward and backward in the Z-axis direction toward an auxiliary die provided on the base in opposition.