JP2542404B2 - Punch device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a punching device for punching a ceramic green sheet (hereinafter, simply referred to as a green sheet) for forming a ceramic substrate.

[Conventional technology]

As a punch device for punching green sheets,
For example, there is one disclosed in JP-A-55-91617.

In this punching device, a pair of solenoids is provided corresponding to each of a large number of punches arranged at required intervals, and the punches are positioned by energizing one solenoid. The liquid cooling system removes a large amount of heat generated when one solenoid is always energized to prevent the solenoid itself from being damaged.

[Problems to be Solved by the Invention]

However, if the number of punch pins in the punch device increases,
In order to keep the whole at a uniform temperature, a large cooling device must be used and a large amount of cooling liquid must be circulated, so that the device becomes large. In addition, the risk of leakage of the cooling liquid increases.

An object of the present invention is to solve the above-mentioned problems, reduce the amount of heat generation, prevent the generated heat from being transferred to the punch pin side, and allow the heat generating portion to be cooled by air cooling. To provide.

[Means for solving the problem]

The above-mentioned problems are: 1. Bed, XY table supported by this bed, base fixed to the bed so as to be positioned above the XY table, and a predetermined force supported by the spring by the base. A die set that holds an upper die that is biased upwards by a plurality of punch pins that can be connected to the drive shaft and that is slidable in the axial direction at predetermined intervals, and a lower die that has holes facing each punch pin. A support for holding a workpiece fixed between the upper die and the lower die, which is fixed to an arm standing on the XY table, and a moving means for moving an upper surface plate of the die set to a predetermined processing position. And a driving device which is coupled to the upper surface plate through a heat insulating material and a heat insulating plate and includes an electromagnetic coil and a plurality of driving shafts which are driven by the electromagnetic coil and can be brought into and out of contact with the punch pin, and attached to the driving device. And a cooling device for performing ventilation inside the drive device is provided, it is solved by configured to energize the electromagnetic coil only when moving the punch pin.

[Action]

Since the punch is held by the spring and only the electromagnetic coil corresponding to the punch that acts on the machining is energized, the amount of heat generated by the electromagnetic coil is small. Then, the cooling device ventilates the inside of the drive device to cool the electromagnetic coil and the drive shaft that receives heat radiation therefrom. Further, since the driving device is supported on the upper surface plate via the heat insulating plate, heat from the electromagnetic coil is not transmitted to the die set.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

First, the overall configuration will be described with reference to FIGS. 1 and 2. 1 is a partial side sectional view of the punch device according to the present invention, and FIG. 2 is a plan view of FIG.

1 is a bed. A base 2 is supported by the bed 1. A linear guide 3 is mounted on the base 2 in parallel. A Y table 4 is supported on the linear guide 3. Reference numeral 5 denotes a nut, which is fixed to the lower surface of the Y table 4. Reference numeral 6 denotes a feed screw, which is rotatably supported on the base 2 in parallel with the linear guide 3 and screwed into a nut 5 and is rotationally driven by a motor (not shown) so that the Y table 4 is perpendicular to the plane of FIG. Move back and forth in any direction. A linear guide 7 is supported on the Y table 4. An X table 8 is supported on the linear guide 7. A nut 9 is fixed to the lower surface of the X table 8. 10 is a feed screw, which is parallel to the linear guide 7
It is rotatably supported on the table 4 and is screwed into the nut 9. A motor 11 is fixed to the Y table 4 together with the gear box 12. Then, the X-table 8 is reciprocated in the left-right direction in FIG. 1 by the operation of the motor 11.

In addition, the base 2, the linear guide 3, the Y table 4, the nut 5, the feed screw 6, the linear guide 7, the X table 8,
Nut 9, lead screw 10, motor 11, and gearbox
12 make up the XY table 18.

An arm 13 stands on the X-table 8 and supports a support 14 at its upper end. A green sheet 15 is held by a frame-shaped holding frame (not shown) that is held and fixed by the support 14. A base 16 is attached to the bed 1 so as to be located above the X table. A duct 17 has one end connected to the base 16 and the other end connected to a dust collector (not shown). 20 is a column, which is erected on the bed 1. 21 is a gear box, column 20
It is fixed at the top of. 22 is a motor, gearbox
Installed on 21. 23 is a guide bar, a bracket
It is attached to the column 20 via 24. 25 is lamb,
It is slidably supported by the guide bar 23. Reference numeral 26 denotes a nut, which is fixed to the ram 25 and is screwed to a feed screw (not shown) connected to the output shaft of the gear box 21. 27 is an arm, which is fixed to the ram 25. 28 is a connection bar, which is supported by the arm 27. A bottom plate 30 of the die set is fixed on the base 16. Reference numeral 31 is a guide post, which is erected on the lower plate 30. Reference numeral 32 is a spring, which is attached to the guide post 31. 33 is the upper plate of the die set, and the guide post via the bearing 34
It is slidably fitted to 31 and supported by spring 32.

In addition, the lower surface plate 30, the guide post 31, the spring
32, die 33 with top plate 33 and pairing 34
Is formed.

A die 36 is fixed to the lower surface plate 30. 37
Is a base plate and is fixed to the lower surface of the upper surface plate 33. A punch plate 38 is fixed to the lower surface of the base plate 37.

A heat insulating plate 50 is fixed on the upper plate 33 of the die set 35 via a spacer 51 formed of a heat insulating material.
A punch pin driving device 52, which will be described later, includes an electromagnetic coil and the like inside the housing. Reference numeral 54 denotes a base of the driving device 52, which is fixed on the heat insulating plate 50 via a spacer 53 formed of a heat insulating material.

Next, the die set 35 will be described with reference to FIG.
Incidentally, FIG. 3 is a partial front sectional view of the die set 35.

A plurality of holes are formed in the die 36 at predetermined intervals.
In addition, the base plate 37 is formed with a plurality of holes facing the holes of the die 36. A positioning pin 39 is provided upright on the punch holder 38 and slidably fitted in a hole formed in the die 36.

A fan 80 is detachably supported on the drive unit 52. Reference numeral 81 is a duct that guides the air blown from the fan 80 to a desired position and exhausts it.

A punch 40 is mounted in a hole formed in the punch holder 38. The details of the punch 40 will be described later.

Hereinafter, a more detailed description will be given with reference to FIG. 4. FIG. 4 is an enlarged view showing the punch pin and the main part of the driving device.

A sleeve 41 is inserted into the hole of the punch holder 38. A bearing 42 is inserted in the sleeve 41. 43 is a spring, which is mounted in the hole of the base plate 37. A holder 44 is supported by the spring 43. A punch pin holder 45 has a small-diameter shaft part that fits into the bearing 42 and a large-diameter shaft part that movably penetrates the spring 43 and the holder 44. Is formed with a flange projecting toward the outer periphery, and the flange at the center contacts the holder 44 and is supported by the spring 43. The punch pin holder 45 is cut so as to form two parallel planes including the upper end flange portion, and is formed into a substantially oval shape when viewed in the axial direction (hereinafter, this portion is referred to as the clutch 60).

A punch pin sleeve 46 is press-fitted into a large diameter hole of the punch pin holder 45 and integrated with the punch pin holder 45. The punch pin sleeve 46 has a screw hole at the upper end, a large diameter hole portion following the screw hole, and a small diameter through hole following the large diameter hole portion. Reference numeral 47 denotes a punch pin, which has a large diameter portion that fits into a large diameter hole of the punch pin sleeve 46, a medium diameter portion that penetrates the hole of the punch pin holder 45, and a green sheet.
It consists of a small diameter part for drilling 15 holes. 48 is a screw that is screwed into the hole of the punch pin sleeve 46 and
The punch pin 47 is backed up by contacting the upper end surface of the punch 47. 49 is a regulation plate, which is a punch pin holder 45
It is fixed to the base plate 37 so as to be in contact with one of the flat surfaces formed on the upper part of the plate and regulates the rotation of the punch pin holder 45.

Reference numeral 55 denotes a guide plate, which is arranged in parallel with the base 54 at a predetermined interval.

Reference numeral 56 denotes a hollow drive shaft, which is formed by integrally connecting a shaft portion 59 made of a magnetic material and a shaft portion 59 made of a non-magnetic material to both ends of a shaft portion 58 made of a magnetic material, and fixed to a base 54 and a guide plate 55. 57 is slidably penetrated.

Reference numeral 61 denotes a clutch, which is an upper small-diameter hollow shaft portion fitted to the lower end of the shaft portion 59, and a lower portion which engages with the clutch 60 formed on the upper end of the punch pin holder 45 (that is, the upper flange portion of the punch pin holder 45). A large-diameter hollow shaft portion is formed, and flanges that project inward are formed at the central portion and the lower end portion. Further, a groove having a width slightly larger than the two-plane width of the clutch 60 is formed at the lower end portion so as to connect to the large-diameter hollow shaft portion. In addition, the clutch 61 has a shaft portion by a pin.
It is connected to 59 and is integral with the drive shaft 56.

62 is a bushing sleeve, the upper end of which is formed with a flange that fits into a small-diameter hollow part above the clutch 61, the shaft part slidably penetrates the flange of the central part of the clutch 61, and the lower end of the large-diameter part of the clutch 61. It is arranged so as to project into the hollow portion. Further, the inner diameter of the bush sleeve 62 is larger than the outer diameter of the screw 48, and a radial groove is formed at the lower end.

Reference numeral 63 is a spring, which biases the punch pin sleeve 46 downward via the push sleeve 62. The force with which the spring 63 biases the punch pin sleeve 46 is sufficiently larger than the force required for drilling.

Reference numeral 65 denotes an operation shaft, an operation groove 66 is formed at the upper end, a pair of through holes 67, 68 are formed in the shaft portion at a predetermined interval orthogonal to the axis, and fixed to the upper end of the drive shaft 56. ing.

Here, a procedure for engaging the clutch 61 and the clutch 60 will be described.

Insert the tip of a screwdriver into the groove 66 of the operating shaft 65
Turn 65 to align the groove direction under the clutch 61 with the restricting direction of the restricting plate 49.

Push down the operating shaft 65, and the groove under the clutch 61
When it goes over the flange of 60, turn the operating shaft 65 90 degrees.

Release the pressing force.

Then, the clutch 61 and the clutch 60 are coupled by the counter pressure of the spring 63, and the drive shaft 56 does not rotate unless an intentional operating force is applied to the operating shaft 65.

Here, the holder 44, the punch pin holder 45 (including the punch pin sleeve 46) and the punch pin 4 which are substantially integrated by engaging the clutch 61 and the clutch 60 are provided.
7, the screw 48, the drive shaft 56 (including the clutch 61 and the operation shaft 65), the bush sleeve 62 and the spring 63 are collectively referred to as a punch 40.

Reference numerals 72 and 73 denote detectors, each of which includes a light emitter and a light receiver that face each other across the operation shaft 65, and are supported by a base 70 fixed on a guide plate 55 via a bracket 71.

75 and 76 are electromagnetic coils. 77 and 78 are drive circuits for the electromagnetic coils 75 and 76. A control device 79 controls the drive circuits 77 and 78.

The coercive force of the spring 43 is set to a size that can hold the punch 40 in the raised position.

 The operation will be described below.

The ram 25 is lowered to bring the connecting bar 28 into contact with the upper plate 33.

The green sheet 15 is inserted through the gap between the die 36 and the punch holder 38 to fix the support 14.

Lower the ram 25 and put the punch holder 38 in the green sheet.
The dust collector and the fan 80 are operated while being close to 15.

The XY table 18 is operated to position the green sheet 15.

The electromagnetic coil 76 corresponding to the punch 40 to be activated is energized.

Due to the magnetic force generated in the electromagnetic coil 76, the punch 40 descends against the spring 43 and punches the green sheet 15.

When the hole 67 of the operation shaft 65 faces the detector 73 and a detection signal is output from the detector 73, the electromagnetic coil 76 is deenergized and the electromagnetic coil 75 is energized. Then, the punching is performed by the magnetic force generated in the electromagnetic coil 75 and the coercive force of the spring 43.
40 rises.

When the hole 68 of the operation shaft 65 faces the detector 72 and a detection signal is output from the detector 72, the energization of the electromagnetic coil 75 is stopped.

Hereafter, repeat until ~ is completed.

When drilling is completed, return to the above and then.

In the above-mentioned procedures (1) to (5), the air sucked from the hole A formed in the base 54 of the drive unit 52 is exhausted to the outside through the hole B formed in the guide plate 55, and the electromagnetic coils 75 and 76 are provided.
Then, the outer peripheral surface of the drive shaft 56 is cooled. The air passing through the inside of the drive shaft 56 also cools the drive shaft 56 from the inside.
That is, when the inside of the drive device 52 becomes a negative pressure, air enters the lower large diameter hollow portion from the hole at the lower end of the clutch 61, and enters the bush sleeve 62 from the radial groove at the lower end of the bush sleeve 62, and the upper small diameter hollow portion of the clutch 61. Portion, through the inside of the drive shaft 56, and is exhausted to the outside through a cross hole C provided in the operation shaft 65. Even when the fan 80 is not driven, when the temperature inside the drive shaft 56 rises and the air inside the drive shaft 56 warms, the warmed air rises inside and is discharged to the outside through the hole C. Is cooled by natural convection.

In the above embodiment, the ram 25 is used to move the upper plate 33 of the die set 35 to the processing position. However, a drive mechanism that moves vertically is provided in the bed 1, and the upper plate 33 is The upper plate 33 may be connected to a drive mechanism and pulled down. in this case,
Column 20 is no longer needed.

〔The invention's effect〕

As described above, according to the present invention, the energization time to the electromagnetic coil that drives the punch is short. As a result, the amount of heat generated by the electromagnetic coil is greatly reduced, and it is possible to sufficiently cool it by air cooling. Therefore, the entire apparatus is downsized and there is no fear of liquid leakage.

[Brief description of drawings]

FIG. 1 is a partial side sectional view of a punch device according to the present invention,
FIG. 2 is a plan view of FIG. 1, FIG. 3 is a front partial cross-sectional view of the die set, and FIG. 4 is an enlarged view showing a punch pin and a main part of a driving device. 1 …… bed, 13 …… arm, 14 …… support, 16 ……
Base, 18-XY table, 20-column, 25-ram, 33-top plate, 35-die set, 38-punch pin holder, 40-punch, 47-punch pin, 50
...... Insulation plate, 51 …… Spacer, 52 …… Drive device, 75,76
... electromagnetic coil, 80 ... fan.

Claims (1)

(57) [Claims] 1. A bed, an XY table supported by the bed, a base fixed to the bed so as to be located above the XY table, and a base supported on the base and upward by a predetermined force by a spring. A die set which holds an upper die having a plurality of punch pins connectable to a drive shaft and slidable at a predetermined interval in the axial direction and a lower die having holes facing each punch pin, A support that holds a workpiece inserted between the upper die and the lower die, which is fixed to an arm that is erected on the XY table, and a moving unit that moves the upper plate of the die set to a predetermined processing position, A drive unit, which is coupled to the upper plate through a heat insulating material and a heat insulating plate, includes an electromagnetic coil and a plurality of drive shafts that are driven by the electromagnetic coil and can be brought into contact with and separated from the punch pin; It provided a cooling device for performing ventilation of 置内, punch apparatus characterized by being configured to energize the electromagnetic coil only when moving the punch pin.