JP2766892B2 - Punch device for sheet piercing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a punching device for a sheet piercing device, and more particularly to an improvement in a punching device for a sheet piercing device for punching a hole in a green sheet or the like.

(Prior art) Conventionally, an induction motor is used for a slide drive device such as a press of a sheet piercing device for processing a green sheet or the like, and a die, a punch, etc. The punch device is driven in the Z-axis direction. The movement in the XY-axis direction for processing a green sheet or the like is performed by an XY table device using a servomotor and a ball screw. FIG. 4 is an overall configuration diagram of a punching device of the sheet piercing device, where A is an upper die and B is a lower die. The upper die A includes an upper die body 51, and an air cylinder 52 as a number of actuators is mounted on the upper die body 51.
A rod head 55 is attached to the rod 54 of each of the air cylinders 52. The upper die body 51 is provided with a spring mechanism 56 for pressing the stripper plate. The spring mechanism 56 for pressing the stripper plate is provided with a spring 57 for pressing. Each of the air cylinders 52 includes an air pipe 58.
Is connected to a valve (not shown). The lower die B is provided with a lower die main body 59, and a die plate 60 having a number of dies 60a is fixed on the upper surface of the lower die main body 59.
Posts 61 are erected on the lower die body 59, and a stripper plate 62 is provided on the posts 61 so as to be able to move up and down. A spring mechanism for separating the stripper plate 62 from the die plate 60 is provided on the post 61. 63 are provided. A punch guide 64 is provided on the stripper plate 62, and a number of mounting holes 65 are formed in the punch guide plate 64 in a lattice shape, and a step portion 66a is formed in these mounting holes 65. A holder 66 is inserted into the mounting hole 65, and a spring 67 is mounted between the holder 66 and the upper surface of the stripper plate 62. It is in contact with the part 66a. The stripper plate 62 has the mounting holes 65.
A number of punch insertion holes 68 are formed immediately below. The holder 66 holds the punch 53, and the punch 53
Are inserted into the punch insertion holes 68. And punch
There are m columns 53 and only n columns 53. A guide post 69 is provided upright on the stripper plate 62, and the guide post 69 is inserted into a guide hole 70 provided in the upper die body 51, and is aligned. Reference numeral 71 denotes an XY table, 72 denotes a sheet frame positioned on the XY table 71, and 73 denotes a green sheet attached to the sheet frame 72.

(Problems to be Solved by the Invention) However, according to the above-described conventional punching device, selection of whether or not to make a hole and punching of a green sheet are performed by the stroke of an actuator such as a piezoelectric element or a solenoid cylinder. Therefore, there is a problem that the stroke amount of the actuator is directly used as the amount of movement of the punch, and it is difficult to reduce the variation of the amount of movement of the punch, and it is costly to reduce the variation.
For this reason, the tip of a thin punch (about 0.2 mm) has been lengthened to eliminate variations in the punching amount during punching (typically, the punching amount protruding from the green sheet is about 0.2 mm). There is a disadvantage that the tip is broken.

An object of the present invention is to provide an improvement in a punching device in a sheet piercing device for punching a hole in a green sheet or the like, focusing on the above problems.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, the green sheet is moved in the X-axis and Y-axis directions to perform predetermined positioning, and the punch is moved in the Z-axis direction. In a punching device of a sheet piercing device for penetrating a sheet, positioning means for determining a stroke of the punch is provided on a head of the punch which is pushed out by an operation of an actuator disposed above the punch.

(Operation) According to the above configuration, the amount of in and out of the punch is independent of the amount of stroke of the actuator, and the stroke of the punch is determined by the head of the punch. Less, cheaper,
In addition, a punch without breakage can be obtained.

(Embodiment) Hereinafter, an embodiment of a punching device for a sheet piercing device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a part of a punching device of a sheet piercing device according to the present invention. The configuration shown in FIG. 3 (upper die A, lower die B, a spring mechanism for pressing a stripper plate and a spring mechanism) Etc.) and the same configuration are denoted by the same reference numerals and description thereof is omitted. FIG. 2 is a diagram showing the movement of a crank such as a press and the stroke of a mold, a punch and the like. A plurality of air cylinders 1 serving as actuators are disposed on the upper die body 51 so as to be positioned above a punch 10 to be described later, and a rod head 3 is attached to a rod 2 of the air cylinder 1. Each of the air cylinders 1 is a valve (not shown) via an air pipe 58.
When air is drilled, the selected air cylinder 1 is switched by a valve, and the sent air enters through the hole 4 to push down the piston 6 against the spring 5, and the rod connected to the piston 6 2. The rod head 3 is brought into contact with the punch 10. Punch 10 is rod head 3
In the lower part of the area of the punch guide plate 64, it is housed in a large number of mounting holes 65 formed in a lattice shape in the punch guide plate 64 and is inserted into a large number of punch insertion holes 68 formed in the stripper plate 62. The punch 10 has a green sheet at one end.
A thinner punch 10a for punching 73, and a positioning head 10 for determining the punch stroke at the other end.
The punch stroke is determined by the distance L between the punch guide plate 64 and the head 10b. further,
The punch 10 is provided with a stepped portion P, and the stepped portion P comes into contact with a stepped portion 66a formed in the mounting hole 65 together with the holder 66, and the holder 66 is disposed between the holder 66 and the upper surface of the stripper plate 62. The spring 67 is in contact with the step 66a of the mounting hole 65. Then, as in the prior art, there are m punches 10 in a row, and there are only n punches.

In FIG. 2, according to the operation of the crank stroke Sa from the top dead center to the bottom dead center of the press or the like (indicated by a line A), the air cylinder 1 (line B ), The punch 10 (line C) and the stripper plate 62 (line D) provided in the upper die A and arranged between the air cylinder 1 and the gap Sc. At the position of point a of the crank angle, the movement of the stroke of the stripper plate 62 in contact with the green sheet is stopped (it becomes horizontal from the point b), and the punch 10 also stops. However, the air cylinder 1 of the upper mold A descends by the clearance Sd in FIG. 4 with the stroke Sa of the crank.
At this time, after the punch 10 descends the gap Sc between the air cylinder 1 and the head 3 (from the point c to the point d), the punch 10 comes into contact with the head 3 against the spring 67 and descends with the crank stroke Sa (from the point e to f). point). The stroke of the punch 10 is determined by the distance L between the punch guide plate 64 and the head 10b. The stroke of punch 10 is the bottom dead center of the crank (g point)
When the stroke L of the punch 10 ends before the bottom dead center (g point) of the crank and the punch guide plate 64 and the head 10b come into contact with each other, the air cylinder is stopped. The lowering of the rod 1 may be stopped, and the piston 6 may be operated so as to be pushed up.

Next, FIG. 3 shows a second embodiment of the present invention, and shows a positioning head portion for determining a stroke of a punch. punch
The head 10c is provided on the step 10 by a step Q, and the stroke of the punch is determined by the distance La between the punch guide plate 64 and the head 10c.

In the above embodiment, the air cylinder is used for selecting the punch. However, it goes without saying that an actuator such as a piezoelectric element or a solenoid cylinder may be used.

(Effects of the Invention) As described above, according to the present invention, in a punching device for a sheet piercing device, a positioning means for determining a stroke of a punch is provided at a head of the punch, and an actuator disposed above the punch is provided. Is only the operation of the punch, so the amount of in and out of the punch is independent of the stroke of the actuator, and it is only necessary to improve the processing accuracy of the head of the punch, and it is possible to obtain a punch with less variation, less cost and no breakage. The excellent effect of being obtained is obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a part of a punching device of a sheet piercing device according to a first embodiment of the present invention. FIG. 2 is a view showing movement of a crank of a press and the like and strokes of a mold, a punch and the like. FIG. 3 is a diagram showing a part of a punching device of a sheet piercing device according to a second embodiment of the present invention. FIG. 4 is an overall configuration diagram of a punch device of a conventional sheet piercing device. 1 Air cylinder 2 Rod 3 Rod head 10 Punch, 10b, 10c Positioning head 62 Stripper plate 64 Punch guide plate 73 Green sheet

Claims (1)

(57) [Claims] In a punching apparatus for a sheet piercing apparatus, a green sheet is moved in an X-axis direction and a Y-axis direction to perform predetermined positioning, and a punch is moved in a Z-axis direction to penetrate the sheet. A punching device for a sheet piercing device, characterized in that a positioning means for determining a stroke of a punch is provided on a head of a punch pushed out by an operation of an actuator disposed at an upper portion of the punching device.