JPH0671334A - Indirect extrusion press use as also direct extrusion press - Google Patents

Abstract

PURPOSE:To speedily deal with the production of many kinds in small quantities by arranging a shear for the direct extrusion press and a shear for the indirect extrusion press side by side on the same extrusion press body. CONSTITUTION:The shears 28, 40 are mounted on the extrusion press to cut off an extruded product and residual discards of a billet. Then, the shear 28 for the direct extrusion press mounted on an end platen 12 of the extrusion press and the shear 40 for the indirect extrusion press mounted on a container are provided side by on the same extrusion press body. In this way, since only one press body answers the purpose, a small equipment space will do. Further, only the selection between the indirect extrusion die and the direct extrusion die in accordance with the kind of billet metal an wers the purpose to deal with the production of many kinds is small quantities.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direct and indirect extrusion press in which two shearing devices are arranged in series on one extrusion press so that the shearing device can be selectively used depending on the type of die used. Is.

[0002]

2. Description of the Related Art Conventionally, a direct extrusion press has been performed as follows. That is, when performing extrusion press with an extrusion press device, with the container pressed against the die,
The billet on the billet loader is loaded into the container by the extrusion stem at the tip of the ram (normally, a stem-fixed dummy block is mounted, but a dummy block may be interposed between it and the billet). .
Then, the ram is further advanced and the billet is strongly pressed by the extrusion stem, and then the container and the extrusion stem are retracted, and the billet is extruded from the die as an extruded product having a predetermined shape. After extruding the billet, the container is slightly retracted by the container cylinder, and the shearing device arranged at the rear end portion (container side) of the end platen is operated with the discard directly protruding from the die. At this time, the front end face of the discard and the rear end face of the die are positioned vertically below the shear blade, and the discard and the product are cut and separated as the shear blade descends.

Next, regarding the indirect extrusion press, the billet is loaded into a container sleeve, a die and a dummy block are loaded from both sides thereof, and the dummy block is pressed by a stem. As the stem is pressed by the ram and moves forward, the billet in the container is extruded through the die to become a product. When the billet is pushed to the limit, the stem stops moving forward and the stem moves backward. Next, the container is advanced slightly, and the dummy block is separated from the discard by the knocker before cutting the discard which is the rest of the billet with the dummy block protruding from the container. The whole is taken out from the container. At this time, the front end face of the discard and the rear end face of the die are positioned vertically below the cutting edge of the shear body, and the shear body is lowered to cut and separate the discard and the product.

[0004]

However, in the above direct extrusion press, when the billet loaded in the container is extruded as an extruded product having a predetermined shape from the die by advancing the extruding stem, the force of pressing the billet by the extruding stem is increased. In addition, a frictional force opposite to the pushing force is generated between the billet and the container sleeve, and a part of the pushing force that presses the billet with the extrusion stem becomes the frictional force between the billet and the container sleeve. It was difficult to extrude a billet of hard metal because it cannot be used for extrusion of billets.

In contrast to the above-mentioned direct extrusion press, in the case of an indirect extrusion press, when a billet loaded in a container is obtained from a die by a forward movement of an extrusion stem, an extruded product having a predetermined shape is obtained. Since frictional force opposite to the pushing force does not occur and the pushing force by the pushing stem can be used for pushing out the product, it was possible to push the hard metal billet.

For this reason, the conventional direct extrusion press is used when the billet is made of a soft metal, and the indirect extrusion press is used when the billet is made of a hard metal. Or, it was used as a dedicated machine for an indirect extrusion press. For this reason, there are drawbacks such as a large occupied area for installing the extrusion press, or the need for two auxiliary equipments.

An object of the present invention is to provide an extrusion press capable of extruding a wide variety of billets with a single extrusion press, focusing on the above conventional problems.

[0008]

In order to achieve the above object, the direct and indirect combined extrusion press according to the present invention comprises:
An extrusion press having a shearing device for cutting the extruded product and the residual discard of the billet, the shearing device for direct extrusion press provided on the end platen of the extrusion press, and the indirect extrusion press provided on the container. The shearing machine and the shearing machine are installed side by side on the same extrusion press body.

[0009]

[Function] When an indirect extrusion die is used, the shear device attached to the container is used to separate the discard from the product, and when a direct extrusion die is used, the shear device attached to the end platen is used. Disconnect the discard from the product. For this reason, the installation space for the extrusion press is the same as the conventional one, and the machine is close to the machine, improving workability.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the direct and indirect extrusion press according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a longitudinal sectional view of the extrusion press machine, FIG. 2 is a partially cut plan view of the extrusion press machine, and FIG. 3 is A--A of FIG.
FIG. 4 is a vertical cross-sectional view of an essential part of the direct and indirect extrusion press as viewed from the front. A reference numeral 10 is a machine base, and an end platen 12 is fixed to one end side thereof, a cylinder mounting block 14 is installed to the other end side thereof, and an extrusion cylinder 16 is fixedly mounted to the cylinder mounting block 14. The lower end of the end platen 12 facing the extrusion cylinder 16 protrudes to serve as a guide rail support portion 18,
A guide rail 20 is extended on the guide rail support portion 18 in a horizontal direction orthogonal to the pushing direction (hereinafter, the horizontal direction orthogonal to the pushing direction may be referred to as a machine width direction).

The die slide 2 is mounted on the guard rail 20.
2 is installed slidably in the machine width direction, and the convex portion 2 provided on the guide rail 20 and the die slide 22.
0a and the recess 22a are engaged with each other to guide the movement of the die slide 22 in the machine width direction. Die slide 22
Has a U-shaped die mounting portion 22b as viewed from the extrusion cylinder 16 side, and a die 24 is mounted on the die slide 22 as if it were dropped into the die mounting portion 22b from above.

A discard receiver 64 is connected to the die slide 22 so as to be adjacent in the machine width direction by a hook 64c which can be easily released from the connection. A piston rod 65a of a cylinder 65 for moving the discard receiver 64 and the die slide 22 is connected to the discard receiver 64. The cylinder 65 is attached to the end platen 12 by a bracket 65A.

As shown mainly in FIG. 4, a pressure ring 101 is immovably installed between the die slide 22 and the end platen 12. Die slide 2
2 is moved in the machine width direction by a cylinder 25 provided on the side of the end platen 12. Further, it is possible to reciprocate between the extrusion operation position located on the back surface of the end platen 12 (the surface on the extrusion cylinder 16 side) and the die replacement position extracted from the back surface of the end platen 12. A bracket 26 is fixedly provided on an upper portion of the end platen 12 facing the extrusion cylinder 16, and a shearing device 28 for extrusion is directly provided on the bracket 26.

Similarly, a bracket 27 is fixedly provided on the upper portion of the container 38, which will be described later, facing the extrusion cylinder 16, and the shearing device 4 for indirect extrusion is attached to the bracket 27.
0 is provided. The shear devices 28 and 40 are the same device, and are for cutting the discard of the die 24 and the product part, which will be described later, and the shear blade 48a vertically stroked by the pair of shear cylinders 30 (31). Shear slide 48 (4 having (49a)
9) is provided.

On the end platen 12, a direct extrusion die (not shown) and an indirect extrusion die are fixedly held by a die retainer 82 as needed. As described above, the end platen 12 is provided with the shearing device 28 for direct extrusion for separating and cutting the discard from the die when the direct extrusion press is completed, and the indirect extrusion for simultaneously performing the discard separation and cutting when the indirect extrusion press is completed. The shearing device 40 is attached to the container holder 38A. As a result, it is possible to handle the extrusion work for both direct and direct use.

The end platen 12 and the cylinder mounting block 14 are connected by a column 34. A container guide (not shown) is provided on the end platen 12 side of the column 34, and a container 38 is installed along the container guide so as to be movable in the extrusion direction. A container cylinder 43 is provided on the end platen 12 for moving the container 38 in the extrusion direction or the opposite direction. The tip of the piston rod 42 of the container cylinder 43 is the container holder 38.
The container holder 38A is connected to A, and the container holder 38A can be moved in the left-right direction in FIG. 1 by moving the piston rod 42 of the container cylinder 43 forward and backward.

A billet loader 52 is provided on the extrusion cylinder 16 side of the container 38. Billet loader 5
2 can be retracted from the stem advance / retreat area by a drive device (not shown). The extrusion cylinder 16 is provided with a ram 58, and the main crosshead 5 is attached to the tip of the ram 58.
The stem 60 is attached via 6 and the attachment member 54. An oil reservoir tank (not shown) is provided on the upper side of the cylinder 16, and the oil reservoir tank and the hydraulic oil inlet at the rear end of the extrusion cylinder 16 are connected by a prefill valve 66. A butterfly valve is installed in the prefill valve 66. A valve for opening and closing the inlet is installed at the inlet not shown. This valve is opened and closed by a cylinder 72. On the side of the extrusion cylinder 16, a side cylinder 76,
78 and their piston rods 80,
Reference numeral 82 is fixed to the main crosshead 56.
Reference numeral 8 is a die changer main body, 88 is an indirect extrusion die fixing device for fixing the indirect extrusion die 24 on the die slide 22 so that it cannot be tilted, 89 is an indirect extrusion die holder, and 94 is a billet, respectively. Show.

The operation of the direct and indirect dual-purpose extrusion press constructed as described above will be described. First, in a state where the direct extrusion press work is being performed, a direct extrusion die (not shown) is mounted on the end platen 12, and the billet 94 is attached to the container 38 which is in contact with the direct extrusion die. Load the billet 94 into the extrusion stem 60.
The product is extruded through the end platen 12 by extruding directly toward the extrusion die.

When the extrusion is completed, the container 38 is separated from the end platen 12, and the direct extrusion shear device 28 attached to the end platen 12 operates to separate the direct extrusion die from the discard remaining in the container 38. It makes a cut.

When changing the extrusion press for indirect extrusion,
Direct extrusion die currently in use is the die changer body 8
It is replaced with the indirect extrusion die 24 placed above.
Thus, after the indirect extrusion die 24 is replaced, the cylinder 6 is replaced.
The pressure oil is supplied to the piston rod 65a side of No. 5 to move the indirect extrusion die 24 around the press center. At this time, the indirect extrusion die 24 is held in an appropriate state by the indirect extrusion die fixing device 88 and the die retainer 82.

After the indirect extrusion die 24 is mounted on the platen 12, the container 38 is driven toward the indirect extrusion die 24 with the billet 94 loaded in advance, and the container 38 is provided between the indirect extrusion die 60 and the tip portion of the extrusion stem 60. Extrusion is performed using a die. After the extrusion is completed, the discard is cut by the shearing device 40 for indirect extrusion attached to the container holder 38A shown in FIG. 4, and the cycle is finished.

[0023]

As is apparent from the above description, in the direct and indirect combined extrusion press according to the present invention,
An extrusion press having a shearing device for cutting the extruded product and the residual discard of the billet, the shearing device for direct extrusion press provided on the end platen of the extrusion press, and the indirect extrusion press provided on the container. By placing the shearing machine for the same on the same extrusion press main body, depending on the type (hardness or softness) of the billet metal, only the indirect extrusion die or the direct extrusion die needs to be exchanged, and high-mix low-volume production is possible. Can respond quickly. In addition, a single press unit is sufficient, so the installation space is small.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an extrusion press device according to the present invention.

FIG. 2 is a partially cut plan view of an extrusion press device.

FIG. 3 is a front view seen from AA in FIG.

FIG. 4 is a vertical cross-sectional view of a main portion of a direct and indirect extrusion press according to the present invention.

[Explanation of symbols]

 12 End Platen 18 Guide Rail Support 20 Guide Rail 20a Convex 22 Die Slide 22a Recess 24 Indirect Extrusion Die (Die) 28 Direct Extrusion Shear Device 30, 31 Chassis Ring 38 Container 38A Container Holder 40 Indirect Extrusion Shear Device 43 Container cylinder 48,49 Shear slide 48a, 49a Shear blade 52 Billet loader 60 Extrusion stem 82 Die presser 88 Indirect extrusion die fixing device 89 Indirect extrusion die holder

Claims (1)

[Claims] 1. An extrusion press having a shearing device for cutting the extruded product and the residual discard of the billet, the shearing device for direct extrusion press provided on the end platen of the extrusion press, and the container. An extrusion press for both direct and indirect use, characterized in that the shear device for the indirect extrusion press is installed on the same extrusion press body.