JPH03242Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a shell removal device that uses an indirect extrusion press using a loose die and a cleaning ring, and removes shells adhering to the ring outside the press. .

(Prior art) The extrusion process of an indirect extrusion press using a loose die and a cleaning ring is shown in FIGS. 8 to 10.
It consists of the steps shown in the figure.

That is, in FIGS. 8 to 10, 1 is a container, and a pressure stem 2 and a die stem 3 are provided at the front and rear of the center of the container, respectively, and the die stem 3 has a loose die 4 and a die stem 3 for setting the external shape of the extruded material. A cleaning ring 5 is provided to remove shells that adhere to the inner wall of the container during extrusion.

The billet 6 housed in the container 1 is moved forward together with the container 1 and the pressurizing stem 2 (in the direction of arrow C in FIG. 8), so that the extruded material 7 is indirectly extruded through the die hole of the loose die 4. The shell adhering to the inner surface of the container 1 is peeled off by the ring 5.

After the extrusion is completed, the pressure stem 2 is moved back as shown in FIG. 9, and the pressed lees 8 are cut from the die 4 by the shear 9. Then, the container 1 is advanced as shown in FIG. 10, while die handling is carried out. The loose die 4 and the cleaning ring 5 are supported by a clamp member 10 provided at the tip of the robot 11, and the shell 12 attached to the ring 5 is removed by a removal member 13 provided between the clamp members 10, which can be moved in and out. has been done.

(Problems to be Solved by the Invention) According to the above-mentioned conventional technology, the distance between the pair of clamp members 10 and the removal member 13 is constant and cannot be adjusted. 5, the exclusion member 13 must always correspond to the shell 12, which is difficult to operate.

Further, the ring 5 was sometimes deformed by the force when the shell 12 was removed by the removal member 13.

This deformation is due to the wall thickness (radial direction thickness) of the ring 5.
However, if this is done, the die stem 3 will not be strong enough to withstand the extrusion force, so the ring 5 will have to be made thinner, which will deform it and make it difficult to reuse it. was.

An object of the present invention is to ensure that the ring-shaped shell attached to the cleaning ring can be removed outside the press, and to prevent the cleaning ring from being deformed during this removal.

(Means for solving the problem) The technical means taken by the present invention to achieve the above-mentioned object are characterized by the loose die 26
and a cleaning ring 27, and the die 26
The clamp members 29, 30 are provided to hold the ring 27 movably between the press axis and a position off the press axis, and the clamp members 29, 30 are held at a position off the press axis. In a device equipped with a handling robot 28 that allows the die 26 and the ring 27 to be reciprocated in a direction parallel to the press axis via the handling robot 28, a position opposite to the outside position of the clamp members 29, 30 in the press
A backup member 34 on which the cleaning ring 27 is removably inserted is provided on the fixed frame 32, and the shell attachment surface 2 of the cleaning ring 27 fitted on the backup member 34 is provided on the fixed frame 32.
9 is positioned on the end surface 40 of the back-up member 34, and furthermore, a positioning means 37 is provided, which is movable between the shell attachment surface 39 of the cleaning ring 27 held in the back-up member 34 and the die 26. The point is that a shell exclusion member 43 is provided.

(Example and operation) In Fig. 3 showing the outline of the extrusion press equipment,
Reference numeral 20 denotes an extrusion press, which has a pressurizing stem 23 operated by an extrusion force generating device 22 before and after a container device 21, and a die stem 25 attached to an opposing frame 24, and a loose die 26 at the tip of the die stem 25. and a cleaning ring 27 are provided as in the conventional example.

The die and ring are handled by the handling robot 28.
The robot 2 can freely move forward and backward between the press axis and the outside of the press.
8 is equipped with a pair of clamp members 29 and 30 that can be opened and closed, and can be reciprocated in a direction parallel to the press axis at a position outside the press.

A shell removal mechanism 31 is provided correspondingly on the path through which the clamp members 29 and 30 can reciprocate when they are in the outside position of the press.

The shell removal mechanism 31 is constructed as shown in FIGS. 1 and 2.

1 and 2, reference numeral 32 denotes a fixed frame, which is located close to the mount 33 of the handling robot 28 and has an opposing frame 2 on one side outside the press.
It is erected on the 4th side.

Reference numeral 34 denotes a back-up member, which is fixed laterally to the vertical surface 35 of the fixed frame 32 on the side corresponding to the robot 28 via a mounting base 36, and the back-up member 34 has a cleaning ring 27
can be inserted and removed freely.

Therefore, the axis of the backup member 34 and the axis of the die 26 and ring 27, which are chucked by the clamp members 29 and 30 and are located outside the press, are located on the same axis.

In this embodiment, the backup member 34 has a cylindrical shape, but this shape may be solid as long as the inner diameter portion of the ring 27 is removably fitted onto the outer peripheral surface of the backup member 34.

Reference numeral 37 denotes a positioning means, which means that the attachment surface 39 of the shell 38 of the ring 27 fitted on the back-up member 34 is aligned with the back-up member 34.
The ring 27 is positioned so that the vertical surface that is the same as the end surface 40 of the back-up member 34 or the attachment surface 39 slightly protrudes. 3
The clamp member 30 is provided with stoppers 42 above and below the clamp member 6.

However, the positioning means 37 may be either the illustrated step portion 41 or the stopper 42, or
Other mechanical means may also be used.

Reference numeral 43 denotes a shell removing member, which can move in and out between the die 26 and the shell attachment surface 39 of the ring 27 which is fitted and held by the backup member 34.

In this embodiment, a telescopic cylinder 45 is installed in a vertical position on the fixed frame 32 via a mounting base 44, and a shear blade 46 is attached to the piston rod end of the telescopic cylinder 45.
It is designed to advance toward the target and retreat by a contraction operation.

Note that by forming an inclined surface 47 on the shear blade 46, even if the ring 27 is slightly deviated toward the die 26 side, the inclined surface 47 allows the ring 2
7 will be reliably positioned.

Reference numeral 48 denotes a guide, which reliably guides the forward and backward (in and out) movement of the shear blade 46.

Shell removal after extrusion will be explained with reference to FIGS. 4 to 7.

The extrusion press cycle is shown in Figures 8 to 10.
It is the same as shown in the figure.

Clamp members 29 and 30 in the handling robot 28 shown in FIG. 3 are advanced toward the press axis by the expansion of the cylinder, grab the die 26 and the cleaning ring 27, and then are pulled out of the press by the contraction of the cylinder. This state is shown in FIG.

From this state shown in Fig. 4, the handling robot 2
8 is reciprocated on the stand 33 in parallel with the press axis (a rack pinion or a cylinder may be used), the cleaning ring 27 is held by the back-up member 34, and the positioning means 37 moves the cleaning ring 27 onto the attachment surface 39.
is positioned so that it is flush with the end surface 40 or slightly protrudes from it (see FIG. 5).

Next, as shown in FIG.
The shear blade 46 is advanced toward the space between the die 26 and the ring 27, cuts and removes the ring-shaped shell 38, and the shell 38 is placed in a tray, container, etc. (not shown).

At this time, the shear force of the shear blade 46 is
This is transmitted to the ring 27 through the adhesive force of the ring 27, which tends to cause deformation of the ring 27, but since the ring 27 is held by the back-up member 34, such deformation is reliably prevented.

After the shell 38 is removed, the shear blade 46 is retracted (raised) as shown in FIG. 7, and the die 26 and ring 27 are retracted for the next press cycle while being chucked by the clamp members 29 and 30. .

(Effect of the invention) According to the invention, the ring-shaped shell that is transferred to the cleaning ring by peeling off the shell attached to the inner surface of the container is removed outside the press, so it is removed on the axis of the press. It is easier to handle in the post-process compared to those that do, and shell processing can be performed reliably.

In addition, in order to dispose of the shell attached to the ring with the removal member, the ring must be securely gripped together with the die by a clamp member in the handling robot, and the ring must be held in place by the back-up member on the fixed side as the robot moves. The structure is simple and does not require a special separate driving source.

Furthermore, when holding the ring by fitting it onto the back-up member, the shell attachment surface of the ring and the end face of the back-up member can be reliably positioned in the axial direction by the positioning means, and interference between the shell removal member and the ring can be avoided. be able to.

Furthermore, when removing shells attached to the ring with the removal member, there is a risk that the ring may be deformed, but since the ring is held in place by the back-up member, deformation can be reliably prevented. Premature damage to the ring can be eliminated and durability can be improved.

[Brief explanation of the drawing]

Figure 1 shows the main parts of the present invention, and is an elevational view taken along the arrow A-A in Figure 3, Figure 2 is a view taken along the arrow B in Figure 1, and Figure 3 shows the main parts of the present invention. 9 is a schematic plan view of the indirect extrusion press; FIGS. 4 to 7 are elevational views showing the shell removal process in the embodiment of the present invention; FIG. 8 is a sectional view during indirect extrusion; The figure is a cross-sectional view of the lees sheared after extrusion, FIG. 10 is a cross-sectional view of the die and ring in the ejected state, and FIG. 11 is a cross-sectional view showing conventional shell ejection. 26...Loose die, 27...Cleaning ring, 28...Handling robot, 29,
30... Clamp member, 34... Backup member, 37... Positioning means, 43... Shell removal member.

Claims (1)

[Claims for Utility Model Registration] A clamp member 29 that includes a loose die 26 and a cleaning ring 27 and holds the die 26 and the ring 27 movably between a press axis and a position off the press axis; 30, and the die 26 and the ring 27 are connected via the clamp members 29 and 30 at a position off the press axis.
In a device equipped with a handling robot 28 that is capable of reciprocating in a direction parallel to the press axis, a clamp member 29, 30 in the handling robot 28 is located at a position opposite to the outside position of the press.
A backup member 34 on which the cleaning ring 27 is removably inserted is provided on the fixed frame 32, and the shell attachment surface 2 of the cleaning ring 27 fitted on the backup member 34 is provided on the fixed frame 32.
9 is positioned on the end surface 40 of the back-up member 34, and furthermore, a positioning means 37 is provided, which is movable between the shell attachment surface 39 of the cleaning ring 27 held in the back-up member 34 and the die 26. A shell removing device for an indirect extrusion press, characterized in that a shell removing member 43 is provided.