JPH084183Y2 - Axle forging die ejector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an ejector for an axle forging die such as a fully automatic sizing die for sizing a steering knuckle as an automobile part.

(Prior Art) Conventionally, as the forging die of the above-mentioned example, for example,
There is one described in Japanese Patent No. 60-5739.

That is, it is a forging die including a finish die including an upper die and a lower die, in which the lower die is provided with an ejector pin (same as a knockout pin) for lifting a steering knuckle after processing.

In this forging die, a pin hole into which the above-mentioned ejector pin is inserted is provided continuously with the die hole of the lower die corresponding to the cavity, and the ejector pin vertically movably inserted into this pin hole is used for the axle forging work. By pushing out the lower end surface of the axle spindle part in the steering knuckle as
It is configured to take out the steering knuckle after processing.

However, the above conventional structure has the following problems.

That is, since the fluidity of the material changes due to the volume (meat amount) error of the ingot and the heating temperature, the length of the axle spindle portion in the steering knuckle varies in the range of 3 to 4 mm, for example.

For this reason, if the lower end surface of the axle spindle part is directly extruded with the ejector pin described above, the eject height of the work becomes unstable, and the work is gripped by the robot and set in the die, for example, as in the fully automatic sizing die. When a later work is again grasped by the robot and taken out from the die, there is a problem that mischuck frequently occurs.

(Object of the Invention) The present invention provides an ejecting device for an axle forging die, which can always push the axle forging work to a predetermined eject height even if the length of the axle spindle portion varies. To aim.

(Structure of the Invention) This invention is an ejecting device for an axle forging die including an ejector pin for extruding an axle forging work after processing into a lower die, which is provided between the axle forging work and the ejector pin. In the lower die, a holding block that supports the tapered portion of the axle spindle portion of the axle forging work is an ejector device for an axle forging die, which is arranged so as to be interlockable with an ejector pin.

(Effect of the Invention) According to the present invention, the taper portion of the axle spindle portion, which does not have the variation due to the change in the fluidity of the material and can obtain an accurate shape, is supported by the above-mentioned holding block, and at the time of ejecting, the above-mentioned ejector. Since this holding block is pushed up by the pin and the work piece for axle forging is extruded by the holding block,
Even if the length of the axle spindle part varies, the work for axle forging can always be extruded to a predetermined eject height.

As a result, in particular, when the work is used in a fully automatic sizing die in which the robot gripping means attaches to and detaches from the die, there is an effect of eliminating mischuck.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

The drawings show the ejecting device of the axle forging die.
In the figure, a sizing die 2 as a lower die is fixed to a die holder 1, and an impression 3 and a die hole 4 are formed on the upper surface of the sizing die 2.

A space 5 for arranging a holding block is formed in the lower part of the above-described mold hole 4, and a holding block 6 is arranged in the space 5 so as to be vertically movable.

The holding block 6 is arranged between a steering knuckle 7 as an axle forging work and an ejector pin 8 and has a tapered hole 9 formed in the holding block 6,
The steering knuckle 7 supports the tapered portion 11 of the axle spindle portion 10.

In the above-mentioned holding block 6, a pin hole 12 is formed following the taper hole 9 in which the tip portion 8a of the ejector pin 8 is loosely fitted, and the taper cone 8b of the ejector pin 8 is formed at the lower edge of this pin hole 12. Form a tapered seating surface 13 to abut,
The taper cone of the ejector pin 8 described above when ejecting
The seat surface 13 is pushed up by 8b.

A key 15 for locking the block, which is guided by the key groove 14 of the sizing die 2, is integrally attached to the outer surface of the lower portion of the holding block 6 described above.

In the figure, 16 and 17 are normal ejector pins for extruding a portion of the steering knuckle 7 where there is no variation due to fluidity change of the material.

The illustrated embodiment is configured as described above, and the operation will be described below.

In order to extrude the steering knuckle 7 as the work for axle forging after the sizing process shown in FIG. 1, a total of three ejector pins 8, 16 and 17 are provided through an ejector mechanism (not shown) as shown in FIG. Move at the same time.

The center ejector pin 8 of the above-mentioned three ejector pins 8, 16 and 17 does not directly push up the steering knuckle 7, but first pushes up the holding block 6 with this ejector pin 8 to move this holding block. The taper portion 11 of the axle spindle portion 10 of the steering knuckle 7 is pushed out.

Further, the two ejector pins 16 and 17 on both sides of the above-mentioned three ejector pins 8, 16 and 17 directly extrude a portion of the steering knuckle 7, which has no variation due to a change in material fluidity.

Therefore, even if the length of the axle spindle portion 10 varies due to the volume error of the ingot or the heating temperature, the steering knuckle 7 is supported at three points in a state without wobbling, as shown in FIG. It is always extruded to a predetermined eject height, and there is an effect that the work eject height can be stabilized.

Therefore, when the axle forging work is used in a fully automatic sizing die that is attached to and detached from the die by the robot gripping means, there is an effect of eliminating mischuck.

In the correspondence between the configuration of the present invention and the above-described embodiment, the lower die of the present invention corresponds to the sizing die 2 of the embodiment, and similarly, the axle forging work corresponds to the steering knuckle 7, This invention is not limited to the configuration of the above-described embodiment.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a sectional view showing an ejecting device for an axle forging die, and FIG. 2 is an explanatory view at the time of ejecting an axle forging work. 2 …… Sizing type 6 …… Holding block 7 …… Steering knuckle 8 …… Ejector pin 10 …… Axle spindle part 11 …… Tapered part

Claims (1)

[Scope of utility model registration request] 1. An ejecting device for an axle forging die including an ejector pin for extruding an axle forging work after being processed into a lower die, which is in a lower die between the axle forging work and the ejector pin. An ejecting device for an axle forging die, in which a holding block for supporting the taper portion of the axle spindle portion in the axle forging work is arranged so as to be interlockable with an ejector pin.