JPH08243656A - Method for positioning die holder in turret punch press - Google Patents

Abstract

PURPOSE: To eliminate the adjustment work by matching with actual parts at the time of assembling, to surely carry out the positioning, to reduce the working man-hours and the working time and to improve the work-ability by selecting the optimum positioning pin bringing the outer periphery of a stepping part formed in the positioning pin into contact with the inner periphery of a bush fitted to the lower die holder and using while changing the positioning pin. CONSTITUTION: The distance L between the contacting part 53a of a bush 53 contacting with the stepping part 47a formed at the lower part of the positioning pin 47 and an abutting surface 43a has manufacturing and assembling errors. At the time of setting this tolerance range, e.g. to 0.03mm, several kinds of the positioning pins 47 providing the stepping part 47a having different diameters at each 0.01mm in this range are prepared. Then, the positioning pin 47 so as to bring the outer periphery of the stepping part 47a into contact with the inner peripheral contacting part 53a of the bush 53 is selected and used by changing. By this method, the clearance can simply be adjusted to <=0.005mm, and the upper and the lower die holders 29, 31 can be positioned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die holder positioning method in a turret punch press.

[0002]

2. Description of the Related Art Conventionally, in a turret punch press, a large number of punches and dies are mounted on a disc-shaped upper turret and a lower turret respectively in the radial direction and in the vicinity of the outer peripheral portion. By the way, when exchanging the punch and the die, the upper turret and the lower turret are rotated appropriately so that the position where the punch and the die to be exchanged are mounted is located at the exchange position, and then the exchange is performed. In position, first the punch is removed from the upper turret and the die is removed from the lower turret.

As a structure for removing the die from the lower turret, the structure shown in FIG. 6 is well known.

That is, in this structure, as shown in FIG. 6, the lower die holder 105 is fixed by a plurality of bolts 103 penetrating the lower turret 101, and the upper die holder 107 is positioned on the upper surface of the lower die holder 105. The block 109 is positioned and mounted. The upper die holder 107 is provided with a plurality of die mounting holes 111 for mounting a medium-diameter or small-diameter die D.
A key groove 115 is provided which can be engaged with a positioning key 113 protruding from the side surface of the die D.

The key groove 115 serves to position the die D in a directional manner, and the step portion 116 in which the upper die holder 107 contacts the lower die holder 105.
Is provided in the lower die holder 105, and the die mounting hole 1
Reference numerals 11 and 11 respectively correspond to scrap discharge holes 117 provided in the lower die holder 105. Reference numeral 118 is a positioning pin.

Further, a bush 119 is attached to the outer end portion of the lower die holder 105, and the inside of the bush 119 serves as a first positioning hole 121. A through hole 123 is formed in the upper first holder 107 corresponding to the first positioning hole 121 so as to vertically penetrate therethrough.
Bush 125 is attached to 3 and this bush 125
The inside is a second positioning hole 127, and the positioning pin 129 is mounted in the second positioning hole 127.

The positioning pin 129 is provided with a pin 131 projecting in a direction orthogonal to the axis, and a rotatable handle having a not-shown notch engaging with the pin 131 is provided on the upper die holder. It is attached to 107.

With the above structure, when the handle is rotated, the pin 1 inserted into the notch formed in the handle is inserted.
When the 31 moves up and down, the positioning pin 129 moves up and down and the bush 1 attached to the lower die holder 105 is moved.
The positioning pin 131 is inserted into or removed from the position 19. Therefore, the upper die holder 107 can be locked and unlocked with respect to the lower die holder 105.

[0009]

By the way, in the positioning method in the conventional turret punch press described above,
There is a dimensional error during processing and assembly of the positioning pin 129, the bushes 119 and 125, and the upper die holder 107 and the lower die holder 105.
The clearance when positioning 05 and 107 is large. Therefore, the positioning pin 129 and the bush 11
9 is the condition that the fitting is adjusted according to the actual condition at the time of assembling, which requires a lot of time and man-hours and cannot improve workability.

An object of the present invention is to provide a positioning dimension of a die holder in a turret punch press which eliminates the current adjustment work at the time of assembly and ensures positioning, which reduces work man-hours and time to improve workability. Especially.

[0011]

In order to achieve the above object, a method of positioning a die holder in a turret punch press of the present invention according to claim 1 comprises a plurality of lower die holders fixed to an upper surface of a lower turret in the turret punch press. A lower die holder into which a stepped portion formed on a positioning pin for coupling the lower die holder and the upper die holder is inserted, with a positioning dimension for coupling the upper die holder provided with a die mounted on the upper surface of the lower die holder The bush mounted on the eccentricity is slightly eccentric to the center of the lower turret with respect to the center of the positioning pin, and the vertical inner surface of the bush and the vertical surface of the step portion where the upper die holder abuts on the front end side of the lower die holder. Inserted into the bush within the tolerance of the assembly dimension between The dimension of the stepped portion formed on the positioning pin is made to be several different sizes, and the optimum positioning pin where the outer circumference of the stepped portion formed on the positioning pin and the inner circumference of the bush attached to the lower die holder contact is selected. It is characterized by being replaced and used.

[0012]

According to the method for positioning the die holder in the turret punch press according to the above-mentioned claim 1, the vertical surface of the step portion with which the upper die holder abuts the front end side of the lower die holder and the positioning pin mounted on the lower die holder. Determine the assembly dimensional tolerance between the stepped part and the front inner circumference of the bush into which it is inserted. The dimensions of the stepped portion formed on the positioning pin are then assembled to produce several positioning pins with different dimensions, and the contact portion outer circumference of the stepped portion formed on the positioning pin and the inner circumference of the bush are formed. Select the optimum positioning pin that contacts with and replace it.

Therefore, the upper and lower die holders can be reliably positioned, and the number of working steps and time can be reduced.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 5, the turret punch press 1 is provided with a gate-shaped frame 3. The frame 3 includes a lower base 5, side frames 7 standing on the lower base 5, and side frames 7. And an upper frame 9 provided on the upper part of the.

A rotatable lower turret 11 is supported on the lower base 3, and a plurality of dies D are mounted on the circumference of the lower turret 11 at appropriate intervals. A rotatable upper turret 13 corresponding to the lower turret 11 is supported on the upper frame 9, and a plurality of punches P are mounted on the upper turret 13 at a position corresponding to the die D.

FIG. 5 of the lower and upper turrets 11 and 13.
The positions of the die D and the punch P mounted on the right side of FIG.
A striker 15 is vertically movable on the upper frame 9 above. The striker 15 is connected to, for example, a hydraulic cylinder 17 provided in the upper frame 9 via a ram 19.

At the right end of the lower base 5 in FIG. 5, there is provided a carriage base 21 which is movable in the Y-axis direction (left-right direction in FIG. 5), and this carriage base 21 is in the X-axis direction. A carriage 23 that is movable in the direction (perpendicular to the paper surface in FIG. 5) is provided. The carriage 23 is provided with a plurality of work clamps 25 that clamp the work W at appropriate intervals in the X-axis direction.

With the above structure, by moving the carriage base 21 in the Y-axis direction and the carriage 23 in the X-axis direction, the work W clamped by the work clamp 25 provided on the carriage 23 is moved along the X-axis and the Y-axis. The workpiece W is moved in the direction, and the desired position of the work W is positioned at the processing position.

With the desired position of the work W positioned at this processing position, the upper and lower turrets 13, 11 are placed.
Is rotated to index and position the desired punch P and die D at the processing position. Then, by driving the hydraulic cylinder 17 and moving the striker 15 up and down via the ram 19, the punch P and the die D cooperate with each other to perform a normal punching process on a desired position of the work W. .

Next, the lock device for the die holder will be described in detail.

First, referring to FIG. 2, a lower die holder 29 is fixed by a plurality of fastening bolts 27 penetrating the lower turret 11.
The upper die holder 31 has a positioning block 33 on the top surface of the positioning block 33.
It is positioned and mounted by. The upper die holder 31 is provided with a plurality of die mounting holes 35 for mounting the dies D having various diameters. The plurality of die mounting holes 35 have positioning keys 37 protruding from the side surface of the die D.
A key groove 39 that can be engaged with is provided.

The key groove 39 is formed by a directional die D.
The die mounting holes 35 correspond to the scrap discharge holes 41 provided in the lower die holder 29, respectively. A step portion 43 is provided on the tip side (the right side in FIG. 2) of the lower die holder 29 and the upper die holder 31, and is positioned by the positioning pin 45 and the upper die holder 3
Positioning pin 4 for connecting 1 to the lower die holder 29
A locking device 49 with 7 is provided.

Referring to FIGS. 3 and 4, the lock device 49 has a through hole 51 formed in the outer end portion of the lower die holder 29, and a bush 53 is mounted in the through hole 51. On the other hand, the upper die holder 31 is formed with a through hole 55 having an axis eccentric from the axis of the bush 53 by a predetermined amount, and the positioning pin 47 is inserted into the through hole 55 so as to be vertically movable. Incidentally, the positioning pin 47 shown in the drawing of FIG. 4 shows a state in which it is inserted in the bush 53, that is, a locked state.

The means for moving the positioning pin 47 up and down is a pin 57 in a direction orthogonal to the axis of the positioning pin 47.
A cylindrical handle 61 having a notch 59 that engages with the pin 57 is rotatably mounted in a hole 63 formed in the upper die holder 31. A knob 65 is provided on the front side (lower side in FIG. 3) of the handle 61.

A spring 6 is provided at the center of the handle 61.
7 is built in, and the other end of the spring 67 has the hole 6
The handle 61 is inserted into the concave portion 69 formed in the inside 3 and is constantly urged in the projecting direction, that is, the forward direction by the elastic force of the spring 67. Further, a V groove 71 is formed on the front surface side of the handle 61, and the V groove 71 can be engaged with or disengaged from a stopper pin 73 provided on the upper die holder 31. Reference numeral 75 is a cover plate.

With the above structure, when the upper die holder 31 is locked to the lower die holder 29, the knob 65 of the handle 61 is gripped by gripping the handle 61.
When is rotated clockwise, the handle 61 urged in the protruding direction by the built-in spring 67, the stopper pin 73 of the V groove 71 formed on the surface of the handle 61 is inserted, and the rotation is stopped in this state. To do. That is, in this state, the notch 59 formed in the handle 61 lowers the positioning pin 47 via the pin 57, the lower part of the positioning pin 47 is inserted into the bush 53 provided in the lower die holder 29, and the upper die holder 31 is The lower die holder 29 is locked.

In order to unlock the upper die holder 31 and the lower die holder 29, the locks are unlocked by reversing the above operation. That is, when the knob 65 of the handle 61 is gripped and rotated counterclockwise while pressing against the repulsive force of the spring 67 built into the handle 61, the V groove 71 formed on the surface of the handle 61. Comes off the stopper pin 73. In this state, the notch 59 formed on the handle 61 also rotates and the pin 5
The positioning pin 47 rises through 7 and the positioning pin 4
The lower part of 7 is removed from the bush 53 provided in the lower die holder 29 to unlock. Then, the die D is replaced.

Next, the method of positioning the die holder, which is the main part of the present invention, will be described in detail.

Referring to FIG. 1, the step portion 43 formed on the lower die holder 29 is provided with an abutting surface 43a, and the abutting surface 43a is brought into contact with the upper die holder 31 for positioning. A bush 53 is mounted in the through hole 51 provided on the front end side of the lower die holder 29.

On the other hand, the center of the through hole 55 is formed in the upper die holder 31 so as to be eccentric with respect to the center of the bush 53 by a slight amount (for example, 0.3 mm) like the E dimension. Positioning pin 47 to be inserted
The shaft center of is also eccentric.

A contact portion 53a of the bush 53 with which a stepped portion 47a formed under the positioning pin 47 comes into contact,
The distance L to the abutting surface 43a has a manufacturing and assembling error. If the tolerance range is set to 0.03 mm, for example, the stepped portion 4 having different diameters in 0.01 mm increments can be used.
Several types of positioning pins 47 provided with 7a are prepared. Then, by selecting and using the positioning pin 47 such that the outer circumference of the stepped portion 47a and the inner circumference contact portion 53a of the bush 53 come into contact with each other, a clearance of 0.005 mm or less can be easily adjusted. The upper and lower die holders 29 and 31 can be reliably positioned.

Further, as described above, the center of the bush 53 and the center of the positioning pin 47 are eccentric to each other by an E dimension, and the diameter B of the bush 53 is slightly larger than the diameter A of the stepped portion 47a formed on the positioning pin 47. If this is done, the positioning pins 47 having different diameters A can be replaced, and it is not necessary to make an eccentric pin. Further, by making the diameter B of the bush 53 a little larger than the diameter A of the stepped portion 47a formed on the positioning pin 47, the contact portion 53 of the bush 53 can be formed.
“A” is close to surface contact and has a structure capable of withstanding surface pressure.

As described above, the accuracy of the hole position of the bush 53 can be known by abutting the upper die holder 31 against the abutting surface 43a provided on the lower die holder 29. If the range of this accuracy is known, several types of positioning pins 47 having different diameters of the stepped portion 47a are prepared within the range, and the positioning pin 47 having the optimum clearance is selected and used for replacement.

For this reason, the work for adjusting the positioning pin 47 at the time of assembly is eliminated, the number of work steps is reduced, and the quality is stabilized and the workability is improved.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, the stepped portion formed on the positioning pin may be eccentric to adjust the clearance between the upper die holder and the lower die holder.

[0037]

As can be understood from the above description of the embodiment, according to the present invention according to claim 1, the hole positions of the butting bushes can be set on the vertical surfaces of the step portions provided on the upper die holder and the lower die holder. The accuracy can be known, and several types of positioning pins with different diameters of the stepped portion provided on the positioning pin are prepared within the accuracy range. Then, a positioning pin that contacts the outer circumference of the stepped portion and the inner circumference of the bush is selected and used by replacement.

Therefore, it is possible to eliminate the current adjustment work at the time of assembly, reduce the number of work steps and time, stabilize the quality and improve the workability.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a main part of the present invention and a positioning dimension of a die holder.

FIG. 2 is a sectional view including a partial section showing a locking device for locking the lower die holder according to the present invention.

FIG. 3 is a plan view including a partial cross section in FIG.

FIG. 4 is a front view including a partial cross section in FIG.

FIG. 5 is a schematic front view of a turret punch press of an embodiment for carrying out the present invention.

FIG. 6 is a side view of a die holder showing a conventional example.

[Explanation of symbols]

 1 Turret Punch Press 11 Lower Turret 29 Lower Die Holder 31 Upper Die Holder 43 Step 43a Abutting Surface (Vertical Surface) 47 Positioning Pin 47a Step 53 53 Bush D Die

Claims (1)

[Claims] 1. A lower die holder as a positioning method for coupling a plurality of lower die holders fixed to the upper surface of a lower turret in a turret punch press and an upper die holder having a die mounted on the upper surface of the lower die holder. The bushing attached to the lower die holder into which the stepped portion formed on the positioning pin that connects the upper die holder and the upper die holder is slightly eccentric to the center of the lower turret with respect to the center of the positioning pin. Formed on a positioning pin inserted into the bush within the dimensional tolerance of the assembly dimensional tolerance between the circumferential position and the vertical surface of the step portion where the upper die holder abuts on the front end side of the lower die holder. The dimension of the stepped part is made to be several different sizes, and the outer circumference of the contact part of the stepped part formed on the positioning pin and the lower part A method for positioning a die holder in a turret punch press, which is characterized by selecting an optimum positioning pin with which an inner circumference of a bush mounted on the die holder comes into contact and replacing it.