JPH0392300A - Punching device - Google Patents

Abstract

PURPOSE:To dissolve the problems of a die upper surface causing a position shift due to contact with a work member lower surface and a damage due to sliding, by providing a descending means which moves the die to a descending position at the time of a punch and the die being move simultaneously by means of an XY table mechanism. CONSTITUTION:When a die 5 is fitted ascendably/descendably to a lower plate 4 and the lower plate 4 is moved intergrally with an upper plate 15 by means of an XY table mechanism, the die 5 is made to be at a descending position, and separated from a work member A. Next, an movement is made to a punching position and then, the die 5 is ascended to a position where it butts the work member A, and an accurate punching action is conducted between the die 5 and a punch 19.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a punching device used for punching holes in various board materials such as printed circuit boards.

(Prior Art) In the prior art, for example, in the drilling device shown in Japanese Utility Model Application Publication No. 57-193398, in order to ensure that there is no problem in using the scope installed above the center of the drilling,
A punch is attached to the tip of the operating arm, and the operating arm is rotatable and movable up and down relative to the bearing tube of the lifting shaft, thereby connecting the operating arm and the lifting shaft. This allows the punch to swing and move up and down freely.

However, in this case, the force pushing down the punch is transmitted from the lifting shaft to the punch via the operating arm, so the long operating arm is easily deformed, and the operating arm is required to have high rigidity. In addition, since the punch is temporarily removed from the position facing the die by swinging, the relative positions of the punch and the die are likely to be misaligned when returning to the punch, which may cause damage to the punch.

In order to improve this point, the applicant of the present application has previously proposed the invention disclosed in Japanese Patent Publication No. 120094/1983. In this method, the workpiece is supported on a fixed work table, and while the punch and die are held in opposing positions, both are moved simultaneously by an XY table mechanism.

(Problem to be Solved) When the punch and the die are moved simultaneously using the XY table mechanism as described above, the upper surface of the die is set to be approximately on the same level as the upper surface of the work table or at a slightly lower position.

For this purpose, after setting the workpiece at a predetermined position on the work table and determining the drilling position using an image processing device, etc., when moving the punch and die to the drilling position, the upper surface of the die is placed on the workpiece. This may cause the workpiece to be misaligned, making it impossible to drill a hole in the correct position, or causing scratches on the underside of the workpiece due to sliding. In particular, if the workpiece is a double-sided substrate in which a pattern is also formed on the bottom surface, there are problems such as damage to the pattern on the bottom surface.

An object of the present invention is to provide a punching device that uses a punch and a die, in which the upper surface of the die does not come into contact with the lower surface of the workpiece when the punch and die are simultaneously moved by an XY table mechanism. It's about doing.

(Means for Solving the Problems) In order to achieve the above object, the punching device of the present invention includes a lower plate that is movably supported in the XY directions and driven by an XY table mechanism, and that can be moved up and down on the lower plate. a die attached to the die, a lifting means for raising and lowering the die, and an upper plate arranged to be movable up and down relative to the lower plate and to move integrally with the lower plate in the X and Y directions. , a punch fixed to the upper plate facing the die, and a work table fixedly provided between the lower plate and the upper plate.

The elevating means is composed of a cylindrical body screwed into a through hole vertically bored in the lower plate, a pinion provided at the lower end of the cylindrical body, and a driving means for rotating the pinion. However, the die can also be fixed to the upper end of the cylinder.

(Function) The die is attached to the lower plate so that it can move up and down, so when the lower plate moves together with the upper plate by the After moving to the position,
It rises to a position where it contacts the workpiece and performs accurate drilling operations with the punch.

(husband example) An embodiment of the present invention will be described with reference to the drawings.

As shown in the first diagram, a lower plate 4 supported movably in the XY directions by an XY table mechanism 3 is located below a fixed work table 2 that is positioned with a predetermined gap on the base 1. . Both sides of the lower plate 4 are supported by support plates 1a that are fixedly erected on the pace 1.
It is received movably in the X and Y directions. The die mounting portion 4a at the front end of the lower plate 4 is thick and has a through hole 4b formed in the vertical direction.

A die 5 is attached to the through hole 4b via an elevating means 8 so as to be movable up and down. In the elevating means 8, a cylindrical body 81 serving as a die receiver is fitted into the through hole 4b, and a female thread 4c formed on the inner circumferential surface of the through hole 4b and a male screw 81a formed on the outer circumferential surface of the cylindrical body 81 are arranged. They are screwed together. A pinion 82 is provided at the lower end of the cylindrical body 81, and the pinion is rotationally driven by a driving means 83 fixed to the lower frame 4. A cylinder is used as the driving means 83, and the pinion 82 meshes with a rack 84 fixed to the tip of a shaft 83a of the cylinder that moves forward and backward as the cylinder operates.

The die 5 is fixed to the upper end of the cylinder 81. That is, the die holding pipe 6 connected to the rear end of the die 5 is fitted into the cylinder 81, and the die 5 is attached to the cylinder 81 by the die holder 7 connected to the tip of the die holding pipe 6. There is. The rear end of the die holding pipe 6 is connected to a flexible tube 9, so that punch waste can be sucked out with air.

Next, the XY table mechanism 3 will be explained.

The bracket 101 hanging from the X table 10 has an
A nut 103 that meshes with a lead screw 102 for the shaft.
is supported. Both ends of the lead screw 102 are supported by bearings 104, and one end thereof is connected to the shaft of an X-axis stepping motor 105 by a coupling 106.

A bearing 12 is interposed between the X table 10 and the Y table 11. The means for driving the Y table 11 is the same as that for the X table 10 described above.
1 is a bracket hanging from the Y table 11, 112 is a lead screw for the Y axis, and 113 is a nut. Y
A pin 13 projects upward from the table 11 and fits into a bearing 14 provided on the lower plate 4. The lower plate 4 is movable in the xY directions via the bin 13 by the XY table mechanism 3. The upper surface of the dice 5 is set to be approximately at the same level as the upper surface of the work table 2 in the raised position. A through hole 2a is formed in the work table 2 so as not to impede movement of the die 5 and the die holder 7, which move together with the lower plate 4 in the X and Y directions.

Next, the upper plate 15 will be explained.

A vertically extending frame 16 is fixed to the lower plate 4 and reinforced by a reinforcing plate 16a. This frame 16 is provided with bearing portions 16b and 16c, and a guide shaft 17 is supported on the shaft so as to be movable up and down. guide shaft l
7, the upper plate 15 has bearing parts 15a on both sides thereof.
They are connected by tightening screws (not shown). A bunch 19 is attached to the front end of the upper plate 15 with nuts 20. This bunch 19 is fixed opposite to the die 5. A shaft 21 is connected to the rear end of the upper plate l5 with a nut 22, and a pin 2 is connected to the lower end of the shaft 21.
3, the stripper 24 is connected to be able to swing slightly up and down. The front end of the stripper 24 is provided with a hole 24a through which the tip of the bunch 19 passes, and a protrusion 24b for holding down the workpiece. Further, a downward pressing force transmitting portion 25 is provided between the upper plate 15 and the stripper 24. That is, the sleeve receiver 26 provided on the upper plate 15
The shaft 27 passing through has a circumferential groove 27a at its lower end.
A spherical surface 27b is formed on the lower end surface. The upper end of the shaft 27 protrudes through a cap 28 fixed to the upper plate 15, and a nut 29 is screwed onto the shaft 27 to regulate its height position. A spring 30 is housed within the cap 28 for applying a downward spring force to the shaft 27. The spherical surface 27b is in contact with the upper surface of the stripper 24, and the holder 31 is engaged with the groove 27a from both sides, and this holder is fixed to both sides of the stripper 24.

Next, the upper plate driving means 32 for vertically moving the upper plate 15 will be explained.

A shaft 34 is supported as a fixed member on a side plate 33a of a frame 33 fixed to the base 1, and a press lever 35 is swingably supported on this shaft 34. Press lever 3
5 transmits a force for moving the upper plate l5 up and down. That is, the rear end of the pressing lever 35 is connected to the base 1.
A pin 38 is attached to a connecting shaft 37 of a hydraulic cylinder 36 fixed to
are swingably connected via the Therefore, the pressing lever 35 swings about the shaft 34 as the hydraulic cylinder 36 moves back and forth. Numeral 39 is a screw for determining the degree of extension of the hydraulic cylinder 36, and is fixed to the upper plate 33b of the frame 33. The front end of the pressing lever 35 is bifurcated to form a pressing portion 35a. A guide long groove 35b extending in the front-rear direction (X direction) is formed at the front end of the pressing portion 35a. The bunch pressing member 40 has pressing parts 35a on both sides,
35a, and a shaft protruding from both sides thereof passes through the long guide groove 35b, and is slidable in the X and Y directions via this shaft.

A connecting member 41 is fixed to the front end surface of the upper plate 15, and the connecting member 41 and the punch pressing member 40 are configured to be connected and separated via a connecting means (not shown). With this configuration, when the pressure lever 35 swings by the hydraulic cylinder 36, the upper plate 15
moves up and down.

The workpiece A, which is conveyed in the Y direction on the work table 2 by a conveying means (not shown), is held by a position holding means 42. That is, the two clamper levers 43 extending forward in parallel are swingably supported at their rear ends by a shaft 44 supported by the frame 33. A connecting lever 45 is fixed to the rear end of this clamper lever. The connecting lever 45 is connected to the through hole 35 of the pressing lever 35.
An air cylinder 46 extends upward through the air cylinder 46 and has an upper end fixed to the upper plate 33b of the frame 33.
is connected to the shaft of the motor via a rod. A clamper 47 is attached to the front end of the clamper lever 43. The clumper 47 is connected to the front end of the clumper lever 43 via shafts (not shown) protruding from both sides thereof, so that it can slide in the X direction but cannot be displaced in the vertical direction.

Above the drilling position of the workpiece A on the work table 2, an image of the drilling position of the workpiece is taken, the image is processed to calculate the accurate drilling position, and the signal is sent to the XY table mechanism 3. A TV camera 48 for supplying the information is fixedly arranged.

Next, the operation will be explained.

Bunch 19 on top plate 15 and die 5 on bottom plate 4
are arranged in advance in exact opposing positions. For example, when drilling a hole in printed circuit board A, which is a workpiece, printed circuit board A is moved to
It is conveyed in the direction on the work table 2, and stops when the hole drilling position comes under the TV camera 48. Then, the air cylinder 46 of the position holding means 42 is activated, and the connecting lever 45,
The clamper lever 43 is swung to lower the clamper 47. The clamper 47 presses the printed circuit board A with its lower surface to hold it in position.

Next, a drive signal is supplied to the cylinder 83, and as shown in the second and third figures, the shaft 83a protrudes and the rack 84 moves forward.
The pinion 82 and the cylinder 81 are rotated together. Due to this rotation, the cylindrical body 81 is lowered relative to the lower plate 4, and the dice 5 are also lowered together, so that a gap is formed between the printed circuit board A and the upper surface of the dice 5.

Then, the XY table machine side 3 operates, the X table 10 moves backward, and the lower plate 4. Upper plate 15, stripper 2
4 retreat together. The die 5 moves back together with the lower plate 4, and the bunch 19 and the connecting member 4 move together with the upper plate 15.
1 retreats, and the bunch pressing member 40 also retreats together with the connecting member. During this retreat, the printed circuit board A
Since a gap is formed between the die 5 and the die 5, the two do not come into contact with each other.

At this position retreated in the X direction, the drilling position of the printed circuit board A is imaged by the TV camera, the image is processed by the image processing device, the coordinates of the center position of the drilling position are calculated, and the coordinate signal is supplied to the XY table mechanism 3. be done.

The XY table mechanism 3 operates by supplying this signal,
Move the lower plate 4 to a predetermined position.

Since the amount of movement of the lower plate 4 in the Y direction is within the range of the conveyance error of the printed circuit board A, it is supported so that it can be moved by a small amount. This movement brings the center of the die 5 fixed to the lower plate 4 to a position that coincides with the center of the hole to be drilled, but since the die 5 remains in the lowered position during this movement, it comes into contact with the printed circuit board A. There's nothing to do. Since the upper plate 15 and the stripper 24 move integrally with the lower plate 4 via the frame 16, the facing positions of the punch 19 and the die 5 do not change.

Further, as the upper plate 15 moves, the punch pressing member 40 moves in the xY direction via the connecting member 41. At this time, since the pressing lever 35 is in the fixed position, only the bunch pressing member 40 follows and moves.

For this purpose, the punch pressing member 40 is always located on the nut 20 of the punch 19.

At this point, the drive signal supplied to the cylinder 83 is released, so the shaft 83a retracts and the rack 84 retreats.
At the same time as the binion 82 is rotated in the opposite direction, the cylindrical body 81
also rotate in the same direction. Due to this rotation, the cylindrical body 81 rises with respect to the lower plate 4, and the dice 5 also rise together and come into contact with the lower surface of the printed circuit board A.

Then, the hydraulic cylinder 36 of the upper plate drive means 32 is driven, the front end of the pressing lever 35 is lowered, and the nut 20 is pressed by the bunch pressing member 40. This pressing causes the upper plate 15 to descend together with the guide shaft 17.

The stripper 24 is also lowered via the shaft 21.27.

When the protrusion 24b of the stripper comes into contact with the printed circuit board A, the stripper 24 cannot descend any further, so only the upper plate 15 descends while compressing the spring 30. At this time, the punch 19 punches a hole in the print base [A]. The pressing force applied to the lower plate 4 through the die 5, the die holder 7, and the cylindrical body 81 during the drilling operation is not transmitted to the XY table mechanism 3 because it is received by the support plate 1a. When drilling is completed, the hydraulic cylinder 36 retreats, the front end of the pressing lever 35 rises, and the bunch pressing member 40, the connecting member 41, and the upper plate 15 rise. The upper plate 15 begins to rise,
While the spring 30 is able to expand within the cap 28, the stripper 24 does not rise and holds down the printed circuit board A, so the punch 19 escapes from the hole in the printed circuit board A.

Thereafter, the stripper 24 also rises and returns to its original position.

(Effects of the Invention) The present invention has the above configuration, and when the punch and die are moved simultaneously by the XY table mechanism, the die is moved to the lowered position, so the upper surface of the die is the lower surface of the workpiece. It will not cause misalignment due to contact with the surface, or scratches due to sliding. Further, during the drilling operation, the die is moved to the raised position, so that accurate drilling can be achieved in cooperation with the punch. Furthermore, the configuration is simple and can be provided at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a sectional view showing the state of the dice during movement,
FIG. 3 is a sectional view taken along the line A--A in FIG. 2. A. Workpiece member, 2. Work table, 3. XY table mechanism, 4. Lower plate, 4b... Through hole, 5... Dice, 8. Lifting means, 81... Cylinder. Body, 82... Pinion, 83... Drive means, 15... Upper plate, 19... Punch. Seikosha Co., Ltd.

Claims (2)

[Claims] (1) A lower plate supported movably in the XY directions and driven by an XY table mechanism; a die attached to the lower plate so as to be movable up and down; a lifting means for lifting and lowering the die; Can be moved up and down relative to XY
an upper plate arranged to move integrally with the lower plate in the direction; a punch fixed to the upper plate facing the die; and between the lower plate and the upper plate. A punching device comprising: a work table that is fixedly provided and on which a workpiece is supported; (2) In claim 1, the elevating means includes a cylinder screwed into a through hole vertically bored in the lower plate, a pinion provided at the lower end of the cylinder, and a pinion provided at the lower end of the cylinder. A punching device comprising a drive means for rotating a pinion, wherein the die is fixed to an upper end of the cylinder.