JPH0531529A - Method for reducing billet from container - Google Patents

Abstract

PURPOSE:To safely and easily take a billet out in a time when this billet charged in a container is become impossible to be extruded. CONSTITUTION:A die stem 29 for extruding and a die stem 40 for receiving an impossible extrusion billet are arranged at two places of a die slide 25 by making them respectively in anti-extruding directions, when a billet 11 charged in a container 13 is become impossible to be extruded, this billet 11 is reduced by changing once upon a time from the extrusion die stem 29 to the stem 40 for receiving the extrusion impossible billet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for extruding a billet from a container that is clogged due to a decrease in temperature of the billet when extrusion-molding a metal such as aluminum or copper.

[0002]

2. Description of the Related Art Conventionally, when a metal such as aluminum or copper is extruded, a billet loader is operated to carry a billet and a dummy block between an extrusion stem and a container, and then the container is operated. Insert the billet and dummy block into the hole in the container and move the extrusion stem forward to bring the billet into contact with the die surface. After that, the container and the extrusion stem were simultaneously moved in the extrusion direction at the same speed, and the billet was extruded from the die.

[0003]

However, when the billet loaded in the container is extruded by simultaneously moving the container and the extruding stem in the extruding direction at the same speed, the billet temperature is lowered due to a defective die or the container heater is cut off. ，
In some cases, extrusion could not be performed due to insufficient extrusion pressure due to a difference in the required extrusion force when using the new extrusion die. When extrusion becomes impossible, the extrusion stem is retracted once, and then the container is retracted to provide a space between the die and the container. Under this condition, the extrusion ratio (container cross-sectional area and product cross-sectional area When the billet that cannot be extruded is extruded after exchanging the die so that the ratio becomes low, the billet is extruded and conveyed to the rear table in the same manner as the product. What is extruded by such a conventional billet extrusion method not only hinders the transfer processing of other regular extruded products, but also extrudes the billet that remains unextrudable in the regular billet extrusion die and container. However, there is a problem in that a large amount of work time is required to replace the die with a die.

[0004]

In order to solve such a problem, in the present invention, an extrusion die stem and a non-pushable billet receiving stem are respectively provided at two positions of the die slide of the end platen in the anti-extrusion direction. When it is impossible to extrude the billet from the extruding die by moving the container and the extruding stem at the same speed in the extruding direction at the same time, the die stem for extruding is fixed at the extruding position. After replacing the extrusion die stem at the extrusion position with the non-pushable billet receiving stem by moving the die slide, move the extrusion stem forward again and move the billet and dummy block remaining in the container to receive the non-pushable billet. It was transferred to the stem side.

[0005]

[Operation] While pushing back the extrusion stem and container,
The extrusion die stem, the container, and the extrusion stem are positioned on the extrusion line, and the billet is charged into the container to start extrusion. When it is not possible to push out due to the temperature drop of the billet, temporarily move the container and extrusion stem back, move the die slide to position the non-pushable billet receiving stem on the extrusion line, and move the extrusion stem and container forward to advance the billet. The assembly consisting of the dummy block and the dummy block is transferred to the non-pushable billet receiving stem side. After that, the die slide is moved again to position the extrusion stem on the extrusion line, and in parallel with the extrusion operation, the assembly on the non-pushable billet receiving stem is further carried out onto the roll conveyor by the billet transfer device.

[0006]

1 to 8 show one embodiment according to the present invention. FIG. 1 is a front view of the entire extrusion press, FIG. 2 is a detailed view of the essential parts of FIG. 1, and FIGS. FIG. 5 is an explanatory view showing the pushing out of the billet, FIG. 5 is a side sectional view of the billet discharging device, FIG. 6 is a plan view seen from AA of FIG. 5, and FIG. 7 is a side sectional view seen from BB of FIG. 8 is an operation explanatory view of the billet discharging device. As shown in FIG. 1, the extrusion press 1
Is provided with a cylinder platen 3 and an end platen 4 which are erected on the bed 2 so as to face each other, and both platens 3 and 4 are connected by tie rods 5 at their four corners. A main ram 6 as a driving device is fixed to the cylinder platen 3, and an extrusion stem 8 having a dummy block 7 mounted at its tip is connected to the main ram 6 via a crosshead 9. The extrusion stem 8 and the crosshead 9 are configured to be driven by the main ram 6 and integrally move back and forth in the axial direction. On the other hand, the die holding device attached to the end platen 4 will be described in detail.

In the apparatus shown in FIG. 2, 4 is an end platen, 24 is an end platen insert provided at the pushing position of the end platen 4, 25 is a die slide that slides in the direction perpendicular to the paper surface, and 26 is a die slide 25 guide. The upper gibs 27 for guiding the lower part of the die slide 25 are lower gibs for guiding the die slide 25. An extrusion die stem 29 is attached to a notch hole 28 formed in a part of the die slide 25. A die 31 was fixed to the tip portion 30 of a cylindrical extrusion die stem 29 arranged in the anti-extrusion direction, and a large-diameter root portion 32 of the extrusion die stem 29 was arranged in the cutout hole 28. However, the outer diameter of the cylindrical portion 33 extending from the root portion 32 of the extrusion die stem 29 was made slightly smaller than the outer diameter of the die 31. Further, at a position adjacent to the rear end of the die 31, a container 13 that is moved forward and backward in the axial direction by a cylinder (not shown) is arranged.
The container 13 is composed of a container holder 13a supported by the cylinder and a container body 13b fitted in an inner hole of the container holder 13a so as to be freely inserted and removed. Further, the container body 13b has a container tire 13c that fits into the inner hole of the container holder 13a and a container tire 13c that has the inner hole.
And the container liner 13d fitted together. Reference numeral 14 is a heater housed in the hollow portion of the container holder 13a.

Reference numeral 11 is a billet which is a metal extruded material. When the container 13 moves in the extrusion direction, the cylindrical portion 33 of the extrusion die stem 29 located at the extrusion position and the die 3
1, so that the container 13 and the extrusion stem 8 can simultaneously slide at the same speed during extrusion. Reference numeral 20 indicates a billet loader device, and 46 indicates a guide rail supporting arm for the billet loader.

In this embodiment, as shown in FIGS. 3 and 4, a die stem 25 for extruding a cylindrical body is attached to one side of the die slide 25 in the direction opposite to the extruding direction, and the other side of the die slide 25 is at least larger than the inner diameter of the container 13. A non-pushable billet receiving stem 40 having a large diameter and a semicircular cross section was attached parallel to the extrusion die stem 29 in the direction opposite to the extrusion direction. These are connected to the die slide cylinder 41 and the die slide 25 via a cylinder rod 42. By supplying and discharging pressure oil to the die slide cylinder 41, either the die stem 29 for extrusion or the stem 40 for receiving a non-pushable billet can be obtained. Only one set can be fixed in the extrusion position.

Further, in this embodiment, as shown in FIGS. 5 to 7, a billet discharging device 50 is provided to further transfer the billet 11 received by the non-pushable billet receiving stem 40 to the roller conveyor 63 side. Has been. The billet discharging device 50 includes a motor 51, a guide screw shaft 52,
It is composed of a guide rod 53, a billet transfer device 59, and roller conveyors 63, 63a. One end of the non-pushable billet receiving stem 40 is fixed to the die slide 25, and the other end is fixed to a bracket 57 having a free end. On this bracket 57, a guide rod 53 whose both ends are non-rotatably fixed and a guide screw shaft 52 whose both ends are rotatably disposed are arranged in parallel.

A moving element 58 is provided which is inserted through the guide rod 53 so as to be movable back and forth and is horizontally engaged by being screwed with the guide screw shaft 52. The billet transfer part is fixedly installed on the upper part. The billet transfer device 59 includes an arm 54, a cylinder 55, a mover 58, a rack 61, a pinion 62 and an engaging portion 64.
It consists of An engaging portion 64 is provided upright on the moving element 58. One end of the arm 54 is rotatably supported, and the other end of the arm 54 has a free end. A cylinder 55 is provided adjacent to the engaging portion 64, and a rack 61 is fixedly mounted via a rod 55a. Further, a pinion 62 which is always meshed with the rack 61 is provided, and when pressure oil is introduced into the cylinder 55, the rod 55a moves forward, and as shown in FIG.
By tilting 4 the billet 11 is discharged to the roller conveyor 63 side via the roller 54b rotatably attached to the tip of the arm 54.

An arrow C-C shown in FIG. 5 is an end platen 4.
Roller conveyor 63 which is arranged on the side of the die and which is composed of a roller group having a drum shape, and a roller conveyor 6 which is arranged on the die slide side and which is composed of a group of rollers having a straight body shape.
It forms a contact / separation surface of 3a. A sprocket 66 is attached to one end of the guide screw shaft 52 on the die slide 25 side so that the power from the motor 51 attached to the upper portion of the die slide 25 is transmitted through the chain. The upper region of the non-pushable billet replacement stem 40 according to the present invention is cut to such an extent that the arm 54 is tilted and does not interfere with the discharging of the billet 11 to the roller conveyor 63 side. In addition, 65 shows a stopper

Next, the billet push-out operation from the container of the present invention will be described with reference to FIGS. 3, 4 and 8.

First, the extrusion stem 8 is largely retracted in the anti-extrusion direction, and the container 13 is also retracted so that the end portion 26 of the container 13 on the extrusion direction side has the extrusion die 31 at the extrusion position. Keep a little away from. Subsequently, pressure oil is supplied to the die slide cylinder 41 to retract the die slide 25 and fix the extrusion die stem 29 at the extrusion position.

Next, the billet loader 20 is operated to carry the relatively long billet 11 and the dummy block 7 between the stem 8 and the container 13, and then the container 13 is operated to remove the billet 11 and the dummy block 7. It is loaded into the container 13 and the extrusion stem 8 is advanced to bring the billet 11 into contact with the die 31 surface. At this time,
The container 13 is also operated in the same manner so that the end 26 on the extrusion direction side of the container 13 is positioned at the die 31.

When the billet 11 contacts the surface of the die 31, the container 13 and the extrusion stem 8 are simultaneously moved in the extrusion direction at the same speed, and the billet 11 is extruded from the die 31. However, as shown in FIG.
When the billet 11 is not effectively extruded due to a decrease in temperature, so-called clogging occurs, first, the extrusion stem 8 is retracted in the anti-extrusion direction, and the container 13 is subsequently retracted. Side end 2
When 6 comes to the side opposite to the extrusion side of the die 31 and a space is created between the container 13 and the die 31, the container 13 is stopped.

In this state, pressure oil is supplied to the die slide cylinder 41 to move the die slide 25 forward to fix the non-pushable billet receiving stem 40 at the pushing position. After that, as shown in FIG. 4, the container 26 is brought into contact with the end 26 on the extrusion direction side and the non-pushable billet receiving stem 40 by a moving cylinder (not shown). Then the extrusion stem 8
Is moved forward, and the assembly 60 integrally formed with the billet 11 and the dummy block 7 by extrusion is transferred from the container 13 to the non-pushable billet receiving stem 40 side.

Thereafter, the extrusion stem 8 is first retracted, and then the container 13 is also retracted so that the end 26 on the extrusion direction side of the container 13 comes to the side opposite to the extrusion side of the die 31 and between the container 13 and the die 31. Container 13 when space is created
To stop. Next, pressure oil is supplied to the die slide cylinder 41 to retract the die slide 25, fix the die stem 29 for extrusion again at the extrusion position, and repeat the above-described extrusion operation.

On the other hand, the non-pushable billet receiving stem 40
The assembly 60 transferred to the upper side is taken out in parallel with the normal billet 11 pushing operation. That is, when the motor 51 is driven, the guide screw shaft 52 rotates and the mover 58 moves to the container 13 side. When the mover 58 moves to an appropriate position, the motor 51 is stopped, and when pressure oil is introduced into the cylinder 55, the rod 55a advances. At this time, the arm 54 starts tilting, and the tip of the arm 54 presses the end surface of the assembly 60. The assembly 60 moves forward while sliding on the roller conveyors 63a, 63, and stops at the stopper 65. After that, the billet 11 portion of the assembly 60 is clamped by a clamp device 71, suspended by a crane 70, and safely transported to a desired position.

[0020]

As is apparent from the above description,
In the present invention, two of the end platen die slides are used.
The extrusion die stem and the non-pushable billet receiving stem are arranged at the respective locations in the direction opposite to the extrusion direction, and the extrusion die stem is first fixed at the extrusion position, and the container and extrusion stem are simultaneously moved at the same speed. When it is impossible to extrude the billet from the extrusion die by moving it in the extrusion direction, the extrusion die stem at the extrusion position is once replaced by the non-pushable billet receiving stem by moving the die slide, and then the extrusion stem is re-exposed. The billet and the dummy block left in the container by moving forward are transferred to the non-pushable billet receiving stem side so that they can be safely carried out of the machine without hindering the extrusion press work. Will be easier. In addition, since it is only necessary to move the die slide without changing the die, the working time is greatly reduced, and regular billet extrusion can be performed in parallel, improving productivity.

[Brief description of drawings]

FIG. 1 is an overall front view of an extrusion press according to the present invention.

FIG. 2 is a detailed view of an essential part of FIG.

FIG. 3 is an explanatory view showing a billet extruding operation.

FIG. 4 is an explanatory diagram showing punching of a billet from a container.

FIG. 5 is a side sectional view of the billet discharging device.

FIG. 6 is a plan view seen from AA in FIG.

FIG. 7 is a side sectional view taken along the line BB of FIG.

FIG. 8 is an operation explanatory view of the billet discharging device.

[Explanation of symbols]

 1 Extrusion Press 2 Bed 3, 4 Platen 5 Tie Rod 6 Main Ram 7 Dummy Block 8 Extrusion Stem 9 Crosshead 11 Billet 12 Moving Frame 13 Container 14 Heater 20 Billet Loader 25 Die Slide 29 Extrusion Die Stem 31 Die 40 Unpushable Billet Receipt Stem 41 Die slide cylinder 50 Billet discharging device

Claims (1)

Claims: 1. An extrusion die stem and a non-pushable billet receiving stem are arranged at two positions of a die slide of an end platen, respectively, in the anti-extrusion direction, and the extrusion die stem is first formed. When the billet cannot be extruded from the extrusion die when the container and the extrusion stem are simultaneously moved in the extrusion direction at the same speed,
After replacing the extrusion die stem at the extrusion position with the non-pushable billet receiving stem by moving the die slide, move the extrusion stem forward again and move the billet and dummy block remaining in the container to receive the non-pushable billet. A method for punching out a billet from a container, characterized in that it is transferred to the stem side.