JP2002137172A - Device for fitting/removing insert for dies - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for fitting/removing an insert for a dies capable of quickly and safely fitting/removing the insert without damaging the dies. SOLUTION: A device of this invention is provided with a hydraulic cylinder 4, an insert fitting/removing pin 13 fitted to the hydraulic cylinder, and a device main body 16 for holding the hydraulic cylinder and a die 2 opposite to each other with the predetermined space and aligning the insert fitting/removing pin and the die.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die insert / detachment apparatus for pushing an insert in a die out of the die or for inserting the insert into the die.

[0002]

2. Description of the Related Art For example, in a ring punching operation by a cold heading machine, if an insert in a die for punching is worn or damaged, the insert is removed from the die for punching or is inserted in order to repair or renew the insert. Is pressed into the die for punching.

[0003] This punching die has a structure as shown in FIG. That is, in the figure,
Reference numeral 2 denotes a die, a cemented carbide sleeve 2A is mounted in the inner hole by shrink fitting or the like.
The insert 3 is press-fitted in A.

Therefore, a repaired or new insert 3
5 is inserted into the inner hole 2a of the punching die 2 by hand, as shown in FIG. 5 (a), by hand holding a handmade insert detachable pin 30 with one hand and hitting the head with a hammer 31. I was going. More specifically, the lower end of the insert 3 is inserted into the opening of the inner hole 2a, and the insert 3 and the die 2 are aligned with each other. Then, the distal end portion 30a of the insert attaching / detaching pin 30 is brought into contact with the upper plate surface 3a of the insert 3, and the head is repeatedly hit with the hammer 31 to be pushed into the predetermined position.

When the worn or damaged insert 3 is to be removed from the inner hole 2a of the punching die 2, the tip of the insert detaching pin 30 is inserted into the inner hole 2a of the die 2, and the tip is inserted into the insert 3a. After being brought into contact with the upper plate surface 3a of the
The player hit repeatedly at step 1 to push it into a predetermined position.

[0006]

However, since all of the above-mentioned conventional methods for inserting and removing inserts are performed manually, there is a risk of accidentally hitting a hand with the hammer 31 or the tip of the insert-removable pin 30 may be damaged. There is a problem that there is a risk of chipping and scattering and damaging a worker, and that a large amount of labor and time (30 minutes to 1 hour) is required to press the insert 3 slowly.

Further, the head of the insert / detachable pin 30 is attached to the hammer 3 while maintaining the state where the insert / detachable pin 30 and the insert 3 are aligned with the core of the die 2 respectively.
Repeated striking with 1 was a task with considerable difficulty, even for skilled workers.

Therefore, as shown in FIG. 5 (b), the core of the insert attaching / detaching pin 30 and the insert 3 and the die 2
When the insert detaching pin 30 and the insert 3 are pushed into the inner hole 2a of the die 2 in a state where the core of the inner hole 2a is displaced from the center, the edge portion of the insert 3 collides with the inner peripheral surface of the sleeve 2A. There is also a problem that the inner peripheral surface is damaged.

Further, as shown in FIG. 5 (c), when the insert detachable pin 30 and the core of the insert 3 are displaced,
When the insert 3 is pushed into the inner hole 2a of the die 2 by hitting the insert detachable pin 30, the edge portion of the insert detachable pin 30 collides with the inner peripheral surface of the sleeve 2A, and the inner peripheral surface is damaged. Would.

Further, the eccentric impact of the insert detachable pin 30 on the insert 3 causes the insert detachable pin 3
However, there is also a problem that the pushing force to the insert 3 due to 0 is dispersed and a loss of the pushing force occurs, and a long time is required for the attaching / detaching operation. These problems are related to Insert 3
Also occurs when extruding through the inner hole 2a of the die 2.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an apparatus for attaching and detaching a die insert that can quickly and safely attach and detach the insert without damaging the die is provided. It is intended to provide.

[0012]

Means for Solving the Problems To achieve the above object, a first invention of the present application is a hydraulic cylinder, an insert detachable pin attached to a piston rod of the hydraulic cylinder,
While holding the hydraulic cylinder and the die in a state of facing each other at a predetermined interval, the hydraulic cylinder and the die are provided with a device main body that aligns the core of the die with the insert attaching / detaching pin, and the hydraulic cylinder is extended by extending the piston rod. The insert is detached from the die and the insert is pushed into the die or pushed out of the die. With this configuration, the insert can be inserted into the die or pushed out of the die quickly and safely without damaging the die.

According to a second aspect of the present invention, there is provided a device for aligning an insert / detachable pin and a die core according to the first aspect, wherein a die installation member having a concave portion for fitting the die, and a flange at a tip end of the hydraulic cylinder are provided. A hydraulic cylinder fixing member provided with a stepped through hole formed of a fitting concave portion and an insertion hole, and a supporting member for supporting the two members at a predetermined interval. And a flange of the hydraulic cylinder is fitted to the hydraulic cylinder fixing member so as to fix the hydraulic cylinder. With this configuration, by setting the die in the fitting recess of the die setting member, the core of the die and the insert attaching / detaching pin coincide with each other, and the core can be easily aligned.

Further, according to a third invention of the present application, a plurality of height-adjustable legs are provided on a die installation member of the apparatus main body according to the second invention, and the apparatus main body is held horizontally by adjusting the height of the legs. Configuration. With this configuration, the core of the die set on the die setting member is in the vertical direction, and the insert can be quickly detached by the pressing force of the insert detaching pin that descends in the vertical direction.

In order to achieve the above object, a fourth invention of the present application is characterized in that a screw hole to be screwed with a tip of a piston rod of the hydraulic cylinder is inserted into one side and a rear end of the insert detachable pin is inserted into the other side and fixed. And a pin holder having respective mounting holes for mounting and dismounting an insert detachable pin on a piston rod of the hydraulic cylinder. With this configuration, it is economical to mount insert detachable pins of any size simply by preparing a plurality of pin holders.

The fifth invention of the present application has a structure in which the tip of the insert detachable pin has an angle corresponding to the countersunk angle of the upper part of the insert. With this configuration,
The pressing force of the hydraulic cylinder is applied to the center portion of the insert, and the insert can be efficiently removed from the die without causing loss in the pressing force.

In a sixth aspect of the present invention, the hydraulic cylinder is a portable hydraulic cylinder capable of manually adjusting the hydraulic pressure. With this configuration, a commercially available device can be diverted and the apparatus main body can be manufactured at a low cost, and at the same time, the drawbacks when the power source is compressed air and the drawbacks when an electric motor is used can be eliminated.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a die insert / detachment device according to the present invention will be described in detail based on one embodiment shown in FIGS. In the drawing, reference numeral 1 denotes a die insert / detachment device for repairing the hydraulic cylinder 4, an insert / detachment pin 13 attached to a piston rod 5 of the hydraulic cylinder 4 via a pin holder 9, the hydraulic cylinder 4, and the insert 3. Alternatively, the die 2 to be updated is held in a state of facing each other at a predetermined interval,
The apparatus comprises an insert / detach pin 13 and an apparatus body 16 for aligning the core of the die 2.

Reference numeral 4 denotes a hydraulic cylinder, which uses a commercially available portable simple hydraulic cylinder as it is, and presses an operating lever 7 attached to the hydraulic cylinder 4 to increase the hydraulic pressure of the hydraulic cylinder 4 and to increase the hydraulic pressure. Thereby, the piston rod 5 can be extended from the lower end of the cylinder portion 6. In the figure, reference numeral 8 denotes a flange provided at one end of the cylinder portion 6.

Here, the reason why the hydraulic cylinder 4 is employed as the drive source of the piston rod 5 is that it is necessary to extend the insert attaching / detaching pin 13 at a low speed and with a large torque when attaching and detaching the insert 3. . That is,
When the air pressure of an air cylinder or the like is used as the driving source, the extension speed of the insert attachment / detachment pin 13 is too fast, and there is a high risk. If the speed is reduced, torque shortage occurs. Also,
This is because, when an electric motor such as a motor is used as a drive source, there is an inconvenience that the device becomes large due to a gear mechanism for deceleration and the like.

Reference numeral 9 denotes a pin holder for removably attaching an insert detachable pin 13 to the piston rod 5 of the hydraulic cylinder 4. A screw hole 10 for screwing with the tip 5a of the piston rod 5 is provided on one side. The other is provided with a mounting hole 11 for inserting a rear end portion 14 of the insert / detachable pin 13.
It is a set screw for fixing the rear end portion 14 of the insert detachable pin 13 inserted therein.

Reference numeral 13 denotes an insert detachable pin, which comprises a rear end portion 14 having a large diameter portion and a pin body portion 15 having a small diameter portion. The diameter of the pin body 15 is slightly smaller than the diameter of the insert 3, and the tip 15 a is chamfered at an angle corresponding to the upper counter surface 3 a of the insert 3. Thereby, the seat of the tip 15a of the insert detachable pin with respect to the insert upper plate surface 3a becomes good, and the pressing force of the hydraulic cylinder 4 is applied to the center of the insert 3, so that the pressing force is not lost. Can be detached inside or outside the die 2.

Reference numeral 16 denotes an apparatus main body,
And a die 2 for repairing or renewing the insert 3 is held in a state of facing each other at a predetermined interval, so that the insert attaching / detaching pin 13 and the core of the die 2 are aligned with each other. A die mounting member 17 having a mating concave portion 17a, a hydraulic cylinder fixing member 18 having a fitting concave portion 18a for fitting the flange 8 at the front end of the hydraulic cylinder and an insertion hole 18b formed at the center thereof, and the two members 17, 18 And a plurality of support members 19 supported at predetermined intervals. In the drawing, reference numeral 17b denotes a discharge hole for discharging the insert 3 extruded from the die 2 to the outside.

When fixing the hydraulic cylinder 4 to the hydraulic cylinder fixing member 18, the tip 5a of the hydraulic cylinder is inserted into the insertion hole 18b, the flange 8 is fitted into the fitting concave portion 18a, and the bolt 20 is tightened. As a result, the hydraulic cylinder 4 is fitted into the fitting recess 1 of the die setting member 17.
7a is fixed on the same core. Then, an insert detachable pin 13 is attached to the piston rod distal end portion 5a of the hydraulic cylinder 4 via the pin holder 9, and the die 2 is fitted into the fitting concave portion 17a of the die setting member 17, and the die 2 and the insert detachable pin are inserted. 13 are installed on the same core.

Reference numeral 21 denotes a leg provided on the lower surface of the die setting member 17 and is composed of a plurality of (four in the illustrated embodiment) bolts.
7 is screwed with a nut 22 attached to the opening of the lower surface of the through hole 17c. By rotating the leg 21, the die setting member 17 is set horizontally, and thus the die insert / detach device 1 is set horizontally with respect to the mounting floor surface G. As a result, the core of the die 2 installed on the die installation member 17 is in the vertical direction, and the insert 3 is moved by the pressing force of the insert detaching pin 13 descending on the same core.
Can be quickly attached and detached.

Next, the detaching operation of extracting the insert 3 from the die 2 or inserting it into the die 2 by the die insert / detachment device 1 having the above structure will be described.
This will be described with reference to FIGS. First, the height of each leg 21 is adjusted, and the die insert / detach device 1 is installed horizontally with respect to the floor surface G. Next, when removing the worn or damaged insert 3 from the inner hole 2a of the die 2, the hydraulic valve 23 in FIG. 3 is fully closed in the state shown in FIG. The hydraulic pressure of the hydraulic cylinder 4 is gradually increased, and the piston rod 5 is slowly extended.

When the piston rod 5 extends,
The insert mounting / dismounting pin 13 mounted via the piston rod 5 and the pin holder 9 slowly descends, and its tip 15a is inserted into the inner hole 2a of the die 2, and the tip 15
a coincides with the upper counter surface 3a of the insert 3 (FIG. 4).
(B)).

When the piston rod 5 is further extended in this state, the hydraulic pressure of the hydraulic cylinder 4 is applied vertically to the center of the insert 3, and the insert 3 slides slowly through the inner hole 2a of the die 2. It descends and is pushed out of the die 2. This extruded insert 3
Is discharged out of the apparatus 1 through the discharge hole 17b of the die setting member 17 (see FIG. 4C).

Next, when the repaired or new insert 3 is to be mounted in the inner hole 2a of the die 2, the inner hole 2a
The lower end of the insert 3 is inserted into the upper end opening of the die 3, and the insert 3 and the die 2 are temporarily fitted in a state where the cores thereof are aligned,
The die 2 is fitted and placed in the fitting recess 17 a of the die setting member 17. As a result, each of the cores of the insert attaching / detaching pin 13, the inner hole 2a of the die 2, and the insert 3 matches (see FIG. 4D).

In this state, the operation lever 7 is operated,
The hydraulic pressure of the hydraulic cylinder 4 is gradually increased, the piston rod 5 is slowly extended, and the insert attaching / detaching pin 13 is slowly lowered. As a result, the tip 15 a of the insert detachable pin 13 matches the upper counter surface 3 a of the insert 3. When the insert removing pin 13 is further lowered, the insert 3 is slowly pushed down while sliding on the inner hole 2a of the die 2, and the insert 3 is pushed into a predetermined position (the thickness of a ring to be manufactured) of the inner hole 2a of the die (the thickness of the ring to be manufactured) ( FIG. 4E).

Thereafter, the hydraulic valve 23 is fully opened to lower the hydraulic pressure of the hydraulic cylinder 4, the pin holder 9 and the like are grasped by hand, and the insert detachable pin 13 is slowly raised to return to the initial position (FIG. 4 (f) )reference).

[0032]

The insert / detachment device for a die according to the present invention has the above-mentioned configuration. (1) The insert can be safely inserted into the die in a short time of about 5 minutes without damaging the die. Or extruded out of the die. (2) Just by setting the die in the fitting concave portion of the die setting member, the core of the die and the insert / detachment pin coincide with each other, alignment is facilitated, and work efficiency is improved.

(3) The core of the die installed on the die installation member is in the vertical direction, and the insert is quickly attached or detached to or from the die by the pressing force of the insert detaching pin descending in the same vertical direction as the core of the die. be able to. (4) Just by preparing a plurality of pin holders, insert detachable pins of any size can be mounted, which is economical.

(4) The pressing force of the hydraulic cylinder is applied to the center of the insert, and the insert can be efficiently attached to and detached from the die without any loss in the pressing force.
(5) Commercially available products can be diverted and inexpensive to manufacture, and there are other effects that there are no drawbacks when the power source is compressed air or an electric motor.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a die insert / detach device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a use state in which a part of the device is cut away.

FIG. 3 is a longitudinal sectional view of the device.

FIG. 4 is an explanatory diagram of an attaching / detaching operation of the insert by the device.

FIG. 5 is an explanatory view of a conventional method for attaching and detaching a die insert.

[Explanation of symbols]

 Reference Signs List 1 Die insert / detach device 2 Dice 2a Inner hole 3 Insert 3a Upper counter surface 4 Hydraulic cylinder 5 Piston rod 8 Flange 9 Pin holder 13 Insert detachable pin 15 Pin body 15a Tip 16 Device body 17 Dice installation member 17a Fitting recess 18 Hydraulic cylinder fixing member 18a Fitting recess 18b Insertion hole 19 Support member 21 Leg

Claims (6)

[Claims] 1. A hydraulic cylinder, an insert-removing pin attached to a piston rod of the hydraulic cylinder, and the insert-removable pin and the die when the hydraulic cylinder and the die are held in a state of facing each other at a predetermined interval. A device main body that matches the center of the hydraulic cylinder, and the insert is pushed into the die by the insert detachable pin by extending the piston rod of the hydraulic cylinder,
Alternatively, a die insert / detach device for extruding from the die. 2. An apparatus body for aligning the insert / detachable pin with a die core, the die main body comprising a die mounting member provided with a concave fitting to the die, a concave fitting and a hole inserted into a flange at a front end of a hydraulic cylinder. Hydraulic cylinder fixing member provided with a through-hole and a supporting member for supporting the two members at a predetermined interval, a die is fitted into a fitting recess of the die installation member, and the hydraulic cylinder fixing member is The die insert / detachment device according to claim 1, wherein the hydraulic cylinder is fixed by fitting a flange of the hydraulic cylinder into the fitting concave portion. 3. The apparatus according to claim 1, wherein a plurality of height-adjustable legs are provided on a die installation member of the apparatus main body, and the apparatus main body is held horizontally by adjusting the height of the legs. 3. A device for attaching and detaching a die insert according to item 2. 4. The piston of the hydraulic cylinder is provided by a pin holder having a screw hole for screwing with a tip of a piston rod of the hydraulic cylinder on one side and a mounting hole for inserting and fixing a rear end of the insert detachable pin on the other side. 4. A device for attaching and detaching inserts for dies according to claim 1, wherein an insert attaching / detaching pin is detachably attached to the rod. 5. The die insert according to claim 1, wherein the tip of the insert attaching / detaching pin has an angle corresponding to a countersunk angle of the upper part of the insert. Desorption device. 6. A die insert / detach device according to claim 1, wherein said hydraulic cylinder is a portable hydraulic cylinder capable of manually adjusting hydraulic pressure.