JPS6235544Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a material holding device that prevents the material from falling or shifting in the die when the material is introduced into the die in a forging process.

Conventionally, when forging a material with a complicated shape, such as the material with a shaft shown in Figure 2, the material fed into the die often falls over or becomes misaligned within the die, causing the punch to fall. There were inconveniences such as not being able to obtain a regular shape during molding and the risk of damaging the mold.

The purpose of the present invention is to improve such inconveniences, and the object is to provide a holding device that allows the material fed into the die to be held in a normal state on the die.

To explain this with reference to the illustrated embodiment, 1 is a raw material, 2 is a die 3, a material input hole 4 is a punch, and 5 is a die clamper. Six holding members 6 are arranged at intervals, and the members 6 are fitted into a horizontal outer cylinder 7 and have a sliding shaft 9 which is elastically held toward the center of the insertion hole 3 by a spring 8. , and a hold link 12 which is pivotally supported at the tip of the sliding shaft 9 via a shaft 10 and is resiliently held vertically by abutting against the upper surface of the die 2 by a spring 11. The spring 8 is supported by a spring receiver 13 provided on the outer cylinder 7 and a concave portion provided on the sliding shaft 9, and a stopper 14 provided at the rear end of the sliding shaft 9 is brought into contact with the end of the outer cylinder 7. The sliding shaft 9 is resiliently held within the outer cylinder 7, and is supported by a spring 11.
is the locking pin 1 provided on the shaft 10 and the hold link 12
5 and the lower surface of the hold link 12 comes into contact with the surface of the die 2, and the hold link 12 is elastically held downward. Each holding member 6 is fitted with a die clamper 5 to prevent it from passing through.
The holding surface 12a of the hold link 12 is formed into a bevel-shaped inclined surface with a minute angle, and a groove 12b is provided on the surface.

According to the embodiment of the present invention configured as described above, when the material 1 is introduced, the maximum outer periphery of the material is placed on the holding surface 12a of the hold link 12, as shown in FIG.
When the punch 4 is lowered in this state and comes into contact with the material 1, the hold link 12 compresses the spring 8 due to this force. The punch 4 moves backward in the circumferential direction, further descends to complete the forming, and when the punch 4 rises, the hold link 12
The spring 8 protrudes toward the center and returns to the normal position, but the material that has been formed is pushed out by a knockout pin (not shown) and comes into contact with the lower surface of the hold link 12 in the normal position.
The material is tilted upward against the spring 11, and the material is ejected from the dies 2 and 3 while its posture is corrected by the link 12.

In this way, according to the present invention, the material input hole 3
Since the material is held by a holding member 6 disposed in a circular manner surrounding the feeding hole 3 on the die 2 having Since it is formed from a sliding shaft 9 that is elastically held toward the center of the hole 3 and a holding link 12 that is pivotally supported at the tip of the shaft 9 and is elastically held downward, it is possible to press-fit the material after holding it. This has the effect of allowing the material to escape smoothly after being pressurized.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view, and FIG. 2 is a sectional view taken along the line of FIG. 1. 2...Die, 3...Material input hole, 6...Holding member, 9...Sliding shaft, 12...Hold link.

Claims (1)

[Scope of utility model registration request] On the die 2 having the material input hole 3, the material input hole 3 is
A plurality of holding members 6 consisting of a sliding shaft 9 which is elastically held toward the center of the sliding shaft 9 and a hold link 12 which is pivotally supported at the tip of the sliding shaft 9 and is elastically held downward are inserted. A material holding device in a forging process characterized by being arranged concentrically surrounding a hole 3.