JPS6061132A - Plastic working device of metallic product - Google Patents

Abstract

PURPOSE:To permit easy taking-out of a formed article and to provide higher productivity and lower cost by inserting and pressing intermittently a blank material for one working into the spacing in dies and providing means for opening the outflow side of the dies in follow up to the retreat of a slider. CONSTITUTION:A metallic blank material 3 is inserted into the restraining hole 2a of a container 2 and a slider 12 is advanced. When a pressurizing means 14 contacts with the top end face of the container 2 under pressure, the entire part of the container 2, die 4 and mandrel 10 descends. When the means 14 is compressed on further advancing of the slider 12, a punch 13 presses the material 3 and forces the same into the spacing 11 between the container 2 and the mandrel 10. The material 3 is extended in the direction of expanding diameter and the axial direction by the die 4 and a tapered part 10c, by which the material flows in the spacing 11 and is plastically deformed. The material 3b which is a semifinished product existing in the previous stage is extruded successively from the spacing between the land part 10b of the mandrel 10 and the die 4 facing the same. The formed article W having the same cross sectional shape in the axial direction is then dropped into a containing space 15.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a plastic working device for metal products, and more specifically, the present invention relates to a plastic working device for metal products, and more specifically, a metal product for one product is sequentially inserted into a mold and molded in the direction of pressure. This invention relates to a plastic working device that allows products to be taken out.

<a> Prior Art and Problems Conventionally, extrusion forging is a processing method for producing products such as bushings by plastic working a metal material that has been processed into products. This is done by inserting and pressurizing a metal material into a predetermined size and shape into the gap formed between the container and the mandrel with a punch. In this method, the mandrel is pulled out and the molded product inside the mold is pushed out to the material pressure side using a knockout pin.

However, with the conventional processing equipment as described above, the molded product cannot be taken out unless the molded product, which is fluidly filled into the gap in the mold, is knocked out to the material pressure side. In addition to causing wear, it also causes some deformation to the molded product, which is undesirable from the standpoint of product accuracy.

Therefore, it is difficult to take out the molded product from the mold, the mold becomes complicated, and the productivity of the molded product is low and the cost is high.

(C) Purpose of the Invention The present invention solves the following drawbacks of the prior art.
The purpose of this is to: - Make it easier to take out the molded product from the mold by sequentially flowing out of the mold gap in the pressure direction for each product bone material, and at the same time improve the productivity of the molded product. An object of the present invention is to provide a plastic processing device for metal products.

Structure of the Invention For this purpose, the plastic working apparatus for metal products of the present invention includes a container having a center hole for constraining the outer diameter of the metal material, and a die connected to the lower end of the container for setting the outer diameter of the molded product. a mandrel, which is arranged concentrically with a gap inside the container and die part, and which restrains the inner diameter of the metal material and sequentially expands the inner diameter of the metal material to finally set the inner diameter of the molded product; and a slider. A punch that inserts and presses a metal material into the gap between the fixed container and die section and the mandrel, and the mandrel, which is connected to the container and die section by the metal material that is being deformed, are integrally moved to follow the slider. and movable means for moving the molded product and creating an outlet on the outflow side of the molded product.

(E) Embodiments of the Invention Specific embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a plastic working apparatus for metal products according to the present invention, where 1 is a base (bolster), 2 is a container that restrains the outer diameter of a metal material 3, and the metal material 3 is inserted into the container. A cylindrical restraint hole 2a is formed to penetrate in the vertical direction. 4 is a die part that determines the outer diameter of the molded product W connected with the lower end of the container 2 so that its axis coincides with the lower end of the container 2, and the die part 4 and the container 2 are integrally fixed to the upper end of the die anvil 5. . Further, the dian building 5 is vertically movably supported by a plurality of guide rods 6 provided vertically on the base l via a support member 7, and there is a space between the support member 7 and the base 1. A compression coil spring 8 concentric with the guide rod 6 is interposed, and the coil spring 8 constantly pushes up the container 2 including the die anvil 5 and the die part 4, and the molded product is placed between the lower end of the die anvil 5 and the base 1. An outlet 9 for taking out is created. 10
is a mandrel that determines the inner diameter of the molded product W, and is arranged concentrically inside the container 2 and the die part 4 with a gap 11 for product extrusion molding,
This mandrel 10 has a cylindrical support part 10a having an outer diameter smaller than the inner diameter of the molded product W, and at the upper end of this support part 10a there is a land part 10b that corresponds to the die part 4 and determines the inner diameter of the molded product W. and a tapered portion 10C that sequentially enlarges the inner diameter of the material 3 in the pressing direction (extrusion direction),
Further, at the upper end of the tapered part 10C, there is a rond part 1 into which a center hole 3a of the metal material 3 is fitted, corresponding to the container 2.
0d is integrally provided in a protruding manner.

A slider 12 is provided above the container 2 so as to be movable up and down, and the slider 12 is equipped with a punch 1 for press-fitting the metal material 3 into the gap 11 of the mold and molding it out.
3 is fixed, and the container 2 of the slider 12 is
A pressure means 14 made of a compression spring or the like is attached to the end face facing the. This pressurizing means 14 is a metal material 3
This is for suppressing and canceling out the stress acting on the die portion 4 that tends to push it up toward the slider 12 when the die portion 4 and the tapered portion 10c are expanded and deformed in diameter by the pressurization of the punch 13.

Next, the processing operation of the plastic processing apparatus configured as described above will be explained.

First, for convenience of explanation, the metal material 3 is inserted and pressurized into the gap 11 by the punch 13, and the die part 4 and the land part 10b are pressed.
The mandrel 10 is expanded and elongated into a semi-finished product state at the taper portion 10C, so that the mandrel 10 becomes integrated with the container 2 and the die portion 4, and the entire body including the die anvil 5 becomes a coil spring 8 as shown in FIG. It is assumed that the position is at the upper moving end.

In this state, the metal material 3 is inserted into the restraint hole 2a of the container 2, and the slider 12 is advanced in the direction of arrow X in FIG. Accordingly, the pressure means 14 provided on the slider 12 comes into pressure contact with the upper end surface of the container 2, and the container 2. Gui part 4. The entire dianvir 5 and mandrel 10 are lowered against the spring pressure of the coil spring 8 as shown in FIG. The descent will stop.

When the slider 12 is further advanced, the pressurizing means 1
4 is compressed, and the compressive force acts on the container 2, and the die part 4 and the die anvil 5 including the container 2 are compressed into the base 1.
When pressed, hold it in a fixed state. At the same time, the punch 13 integrated with the slider 12 pressurizes the metal material 3 and pushes it into the gap 11 between the container 2 and the mandrel 10. When the punch 13 is fully inserted into the restraining hole 2a of the container 2 as shown in FIG. flows in the pressurizing direction within the gap jla,
In addition, the land portion 10b is plastically deformed into the shape shown in FIG. 3, where the inner diameter shape is determined. At the same time, as shown in FIG. 2, the semi-finished metal material 3b in the previous stage is sequentially pushed out from the gap between the land portion 10b of the mandrel 10 and the die portion 4 facing it, so that the inner and outer diameters are adjusted to the specified dimensions. Molded product W that has been expanded in shape and has the same axial cross-sectional shape
and falls into the accommodation space 15.

Then, when the slider 12 is retreated in the direction opposite to the arrow X with the next extrusion process and the pressure applied to the container 2 by the pressure means 14 is released, the container 2. Die part 4.
The mandrel 10, which is integrated with the dianvir 5 and the semi-finished metal material, follows the retreat of the slider 12 and is moved by the spring force of the coil spring 8, so that the molded product outlet 9 opens as shown in FIG. As it is opened, the molded product W is placed on the base 1-
As a result, the molded product W can be easily squeezed out from the outlet 9.

That is, - In the above embodiment, the metal material is placed in the container 2.
and a punch 1 in the gap 11 between the die part 4 and the mandrel 10.
3, it becomes possible to process the molded product by simply inserting it and pressurizing it sequentially and pushing it out from the gap 11 into the accommodation space 15.
Advancement of slider 12.

Container 2, die part 4 and mandrel 1 follow the retreat
0 can be moved up and down to open the molded product outlet 9.

In the above embodiment, the processing of a cylindrical product has been described, but it is of course applicable to the processing of products such as molded products having serrations or splines on both or one of the outer and inner peripheries, or spur gears. Further, in the above embodiment, the container 2.follows the slider 12. Die part 4
Although the case has been described in which the coil spring 8 is used as a means for moving the entire mandrel 10 up and down, an air cylinder or the like may also be used. Furthermore, when the diameter of the material 3 is expanded and deformed, the container 2. If no stress is generated in the upward direction on the die portion 4, the pressurizing means 14 may be omitted.

Furthermore, by providing an outlet in the dian building 5 as shown in FIG. 4, it is possible to take out the molded product W while the lower part 5a of the dian building 5 is fixed to the base 1 side. It is also conceivable to move the center portion 1a of the base 1 laterally and take out the molded product downward from the preset center hole 1b of the base 1. In this case, spring 8
It has the advantage that a long molded product can be taken out with a very small stroke amount of vertical movement.

(F) Effects of the Invention As described above, according to the present invention, - The metal material for the product is intermittently inserted into the gap of the extrusion mold and pressurized, and only passes through the mold once in the pressing direction. This makes it possible to perform flow molding of the product, which reduces wear on the mold, extends the life of the mold, and enables highly accurate product processing. In addition, the molded product outflow side of the mold consisting of the container, die section, and mandrel can be opened following the retreat of the slider, making it easy to take out the molded product, improving productivity and reducing costs. There is.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of the metal product plastic processing apparatus of the present invention, FIGS. 2 and 3 are sectional views for explaining the operation of the apparatus of the present invention, and FIGS. FIG. 3 is a cross-sectional view showing another embodiment of the invention. ■... Base, 2... Container, 3... Metal material,
4... Die part, 5... Die anvil, 6... Guide rod, 7... Support member, 8... Coil spring, 9
... Molded product outlet, 10... Mandrel, 10a.
...Support part, lOb...Land part, 10c...Taber part, 11...Gap, 12...Slider, 13...
- Punch, 14...pressure means, W...molded product. Patent applicant: Hitachi, Ltd. 1 Figure 1 Figure 2 Figure 3 510 Figure 3 Figure 4 Figure 5 Figure 2

Claims (1)

[Claims] a container that restricts the outer diameter of a metal material having a center hole;
A die part is connected to the lower end of this container and sets the outer diameter of the molded product, and a die part is arranged concentrically with a gap inside the container and the die part, and constrains the inner diameter of the metal material and sequentially adjusts the inner diameter of the metal material. A mandrel that deforms and finally sets the inner diameter of the molded product, a punch that is fixed to the slider and pressurizes and extrudes the metal material into the gap between the container and die part and the mandrel, A plastic working device for metal products, comprising a movable means for integrally moving the mandrel connected by a metal material to follow the slider to create an outlet on the outflow side of the molded product.