JP2000158086A - Device for preventing projection of work and pushing in this work in heading machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the shaking movement and the reciprocating movement of arms with a separated driving mechanism, to lighten the moving portion, to cope with high speed driving and to improve the producing efficiency. SOLUTION: The arms 4 shaken so that the tip parts stop at three points of the front surfaces of adjacent two dies (a), (b) and the intermediate of both dies according to reciprocating movement of a ram, are supported with a frame 1. Further, the driving mechanism 11 for reciprocating the interval between the position approaching toward each die and the position retreating from each die under condition of stopping this tip part of the each arm 4 to the front surface of each die.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a work loaded on a plurality of dies mounted in parallel on a die block fixed to a frame is arranged in parallel with a ram reciprocating along the frame opposite to the die block. In a forging machine that presses and molds with a plurality of attached punches and clamps the work protruding from each die with a finger and transfers it to the next die, it prevents the work protruding from the die from jumping out The present invention relates to an apparatus that operates in synchronization with the timing of conveyance to push the work into an adjacent die.

[0002]

2. Description of the Related Art In a forging machine as described above, a work protruding from a die is held between fingers and transferred to a position immediately before an adjacent die, and the work is pushed by a punch approaching as the ram advances. When a part of the work gets stuck in the die, the finger opens and retracts, and then the punch presses the work into the die while pressing to form the work. Is closed and it is difficult to grasp the work.When releasing the work, the punch approaches before the finger opens and the finger may be destroyed. A device has been proposed in which a workpiece transferred to an adjacent die is pushed into the die while the ram is retracting, and the finger is opened before the punch is pressed.

[0003]

However, the conventional device is designed to receive and push the workpiece by the parallel motion and the circular motion of the slide block having a large mass, and cannot cope with high-speed operation. However, there was a problem that the production efficiency was low.

[0004]

Means for Solving the Problems, Actions and Effects As means for solving such problems, the invention of claim 1 relates to a method in which two dies whose tips are adjacent to each other in accordance with the reciprocating movement of the ram are attached to the frame. An oscillating drive mechanism for supporting the oscillating arm so as to stop at the front and three intermediate positions between the two dies is provided, and each arm is stopped at the front of each die. A reciprocating drive mechanism for reciprocating between a position approaching each die and a retracted position in a state, receives a work protruding from the die at the tip of an arm, and is interposed between fingers to form an adjacent die. After pushing the work transferred immediately before to the die with the tip of the swinging arm into the die, the finger is released early, and the arm is retracted to the original die to avoid interference with the punch. Therefore, the swinging motion and the reciprocating motion of the arm can be performed by separate driving mechanisms, and the moving parts can be reduced in weight, and can cope with high-speed operation, thereby improving the production efficiency. is there.

According to a second aspect of the present invention, in the first aspect, the swing drive mechanism has a swing drive source at the other end of a plurality of swing center shafts having a plurality of arms individually fixed at one end. Therefore, a plurality of arms can be swung simultaneously with a simple structure. According to the invention of claim 3, the reciprocating drive mechanism according to the invention of claim 2 has a flange provided on each swing center shaft. A spring is attached to each swing center axis to urge it in one direction, and a pressing member fixed to a swing drive shaft arranged at right angles to each swing center axis is engaged with a flange to swing. Since the center axis is pressed in the direction against the elasticity of the spring and retracted in the biasing direction of the spring, a plurality of arms can be reciprocated simultaneously with a simple structure,
According to a fourth aspect of the present invention, in the third aspect of the invention, the swing center axis moves in a direction away from the die before the movement of the finger, and the arm moves the workpiece. Since the obstruction can be prevented, there is an effect that the invention of claim 1 can be reliably realized.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. In the drawing, reference numeral 2 denotes a die block fixed to the frame 1, and a plurality of dies a, b, c, and d are inserted in front of the die block in parallel at equal intervals in the horizontal direction. , C, and d, the work (not shown) is placed in a frame 1 facing the die block 2.
While pressing and molding with a punch (not shown) attached to a ram (not shown) that reciprocates as a guide,
The work protruded from each die a, b, c, d by a protruding pin (not shown) is sandwiched by fingers (not shown) and transferred to an adjacent die to be sequentially formed.

Although the above is a known forging machine, in the present embodiment, each die a,
A swing center shaft 3 is supported at an intermediate position between b, c, and d so as to freely reciprocate in the axial direction and rotate around a center line. A square portion 15 is formed at the rear end of the shaft 3, and a sleeve 16 that fits tightly and relatively slidably in the square portion 15 is swingably supported by the frame 1 by bearings 17 and 18. The upper end of the link 5 is fixed to the sleeve 16 via a key (not shown) so as to be relatively non-rotatable. The lower end of the link 5 is rotatably connected to the reciprocating drive rod 6 by a shaft 7 so that the reciprocating motion The arms 4 are sequentially stopped in a neutral posture shown by a dashed line in FIG. 1, a leftward posture shown by a two-dot chain line, and a rightward posture shown by a solid line by the reciprocating movement of the rod 6 in the horizontal direction accompanied by the vertical movement. It is supposed to.

A flange 8 is fixed to the swing center shaft 3 by a nut 9 and is biased so as to protrude forward by the elastic force of a spring 10 mounted between the swing center shaft 3 and the thrust bearing 19. Frame 1 placed parallel to 6
The upper end of a pressing member 12 fixed to a swing drive shaft 11 that is freely rotatably supported in an alternate direction is engaged with a flange 8, and the swing drive shaft 11 swings in the alternate direction. Center axis 3
At the same time, each arm 4 reciprocates between a retracted position shown by a solid line in FIG. 2 and a forward position shown by a chain line in FIG.

A striking bracket 13 is fixed to the tip of each arm 4 by a nut 14, and the striking bracket 13 is attached to each die a,
They correspond to molding holes (not shown) formed at the centers of b, c, and d.

This embodiment has the above-described configuration, and when each arm 4 is in a left-tilted posture as shown by a two-dot chain line in FIG. 1 and is in a retracted position as shown by a solid line in FIG.
When the work w is protruded from the forming holes at the centers of the dies a, b, c, and d, the work w is sandwiched between fingers (not shown) and at the same time, abutment fittings 13 at the tips of the arms 4.
When the work w is transferred to the die on the right side by the movement of the finger, each arm 4 also assumes the right-tilted posture shown by the solid line in FIG. The arm 4 advances as shown by a chain line in FIG. 2 and pushes the work w into the forming hole.
After that, the spring 10 is retracted by the elastic force of the spring 10, and then, as shown in FIG.
The workpiece w is retracted to the neutral position between the adjacent dies as indicated by the dashed line, and the work w is formed in the forming hole of the die by the pressing pressure of the punch due to the advance of the ram.

As described above, while the ram is retracted, the work w is transferred and pushed into the forming hole, and the finger and the arm 4 are retracted before the ram advances and the pressing force by the punch is performed. Therefore, even when the gripping portion of the work w is short, interference between the punch and the finger is prevented, high-speed operation is possible, and production efficiency is improved.

In the present embodiment, before the finger holding the workpiece w moves, the arm 4 is moved to the die a,
When moving in a direction away from b, c, d,
Since the butting member 13 is separated from the work w, the finger makes a linear motion, and the interference between the butting member 13 and the work w due to the circular movement of the butting member 13 is avoided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view thereof.

[Explanation of symbols]

 1: frame 2: die block 3: swing center axis 4: arm 5: link 6: reciprocating drive rod 8: flange 10: spring 11: swing drive shaft 12: pressing member a, b, c, d: die

Claims (4)

[Claims] 1. A work loaded in a plurality of dies mounted in parallel on a die block fixed to a frame is pressed by a plurality of punches mounted in parallel on a ram reciprocating in opposition to the die block. In a forging machine configured to form and transfer a work protruding from each of the dies to a next die by sandwiching the work with a finger, the two dies having tips adjacent to each other in accordance with the reciprocating motion of the ram on the frame. And a swing drive mechanism for swinging the arm to support the swinging arm so as to stop at three positions between the front of the die and the two dies. In the stationary state, a reciprocating drive mechanism for reciprocating between a position approaching each of the dies and a retracted position is provided. Pushing device. 2. The forging device according to claim 1, wherein the swing drive mechanism has a swing drive source at the other end of a plurality of swing center shafts each having the plurality of arms individually fixed at one end. Prevention and push-in device of the work in the machine. 3. The reciprocating drive mechanism is provided with a flange on each of the swing center shafts, and a spring is mounted on each of the swing center shafts to urge the swing center shafts in one direction so that a right angle with each of the swing center shafts is established. A pressing member fixed to a swing drive shaft arranged to engage with the flange presses the swing center shaft in a direction against the elastic force of the spring and retreats in a biasing direction of the spring. 3. A device for preventing a work from popping out and pushing in a forging machine according to claim 2, wherein 4. The work according to claim 3, wherein the swing center axis moves in a direction away from the die before the movement of the finger. apparatus.