JP2703124B2 - Extrusion press and extrusion method for copper and copper alloys - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion press and an extrusion method for copper and copper alloys.

[0002]

2. Description of the Related Art As is well known, an extrusion molding method is widely used for forming a metal material having good workability such as aluminum and copper.
As the extrusion press, on both sides of a cylindrical container movably arranged in the axial direction, a pressure stem with a push plate at the tip and a die stem with a die at the tip are arranged facing each other. By inserting the pressure stem and the die stem into the container with facing each other, the billet made of metal material loaded in this container is pressed and extruded to the die stem side, and it is formed into a rod or pipe shape. Widely used.

[0003] However, after the extruding operation by these extrusion presses, a part of the unextruded billet material remains as press cake and remains between the press platen and the die.
It becomes a shell and adheres to the inner wall of the container. In order to remove the debris, a method is often used in which the container is relatively moved to the die stem side after the extrusion operation to make the debris protrude out of the container, and cut and removed by a shear provided at the opening of the container. On the other hand, a wide variety of loose shell removal mechanisms for removing the shell are considered,
Typical examples of the conventionally used shell removing mechanism include a method disclosed in Japanese Utility Model Laid-Open No. 62-105711,
There is a method shown in FIG.

In the former method (Japanese Utility Model Application Laid-Open No. Sho 62-105711), a cleaning ring is mounted between a die stem and a die, and the cleaning ring scrapes the shell on the inner wall of the container at the same time as the billet is extruded. Things.

In the latter method, the container (51) is first moved relative to the die stem (54) after the extrusion operation shown in FIG. Board (5
3), pressed meal (56) and die (55), as shown in (b) and (c)
As shown in the figure, sequentially project outside the container (51),
The press cake (56) is cut and removed by the shear (57), and the press plate (53) and the die (55) are respectively pressed by the press loader (58) and the die receiver.
It is unloaded by a handling device such as (59). Next, as shown in FIG.
After the relative movement in the direction, clean out disc (60)
Is attached to the tip of the die stem (54) by the disk loader (61), and then the container (51) is relatively moved in the direction of the die stem (54) as shown in FIG. Container (51)
The shell (50) remaining on the inner wall of the container (51) is removed, and then the cleanout disk (60) is carried out from the opening of the container (51) on the pressure stem (52) side by the disk receiver (63).

[0006]

However, the former method (Japanese Utility Model Application Laid-open No. Sho 62-105711) is difficult to apply to the extrusion of copper and copper alloys because the shell is removed simultaneously with the extrusion operation. In other words, aluminum and aluminum alloys have a billet temperature as low as about 400 ° C, whereas copper and copper alloys have a billet temperature as high as 600 ° C to 950 ° C. There is a problem that the service life of the ring is shortened and replacement thereof has to be performed frequently, which increases the running cost and a problem that the cycle time becomes longer because the die and the shell are separated outside the press. That's why.

On the other hand, in the latter method, since the shell is removed after the end of the extrusion operation, the life of the shell removing mechanism is long, but the disk loader (61) and the disk receiver (63) for handling the cleanout disk (60). ) Is required, so that the structure of the extrusion press device is complicated.

In view of the above problems, the present invention provides a copper and copper alloy extrusion press having a shell removing mechanism having a long life even at a billet temperature as high as 600 ° C. to 950 ° C. and having a simplified structure. And to provide an extrusion method with a short cycle time.

[0009]

To achieve the above object, the present invention has the following arrangement. That is, the copper and copper alloy extrusion press according to the present invention is provided so as to be movable in the axial direction, and has a cylindrical container (1) in which the billet B is loaded, and a first container (1). A pressure stem (2) inserted through the opening (1a), a pressing plate (3) detachably mounted at the tip of the pressure stem (2), and a second opening of the container (1). A die stem (4) inserted from (1b), and a die (5) detachably attached to the tip of the die stem (4), the pressure stem (2) and the die stem (4) are opposed to each other. Then, the billet B loaded in the container (1) is pressed between the pressing plate (3) and the die (5) to push out the billet B toward the die stem (4) side. In a copper alloy extrusion press, a first opening (1a) of the container (1) is provided.
The first pusher loader (6) for attaching and detaching the pusher (3) to and from the tip of the pressure stem (2) in the vicinity, and the pusher (3) to the pusher (2) near the second opening (1b). ) Second pusher loader to be removed from the tip of (7)
Are rotatably supported at the base end of the container (1), and are provided integrally with the container (1).

[0010] The method of extruding copper and copper alloy according to the present invention comprises a pressing stem (2) having a pusher (3) at the tip and a die stem (4) having a die (5) at the tip. , Opening at both ends of a cylindrical container (1) arranged movably in the axial direction
(1a) The billet B loaded in the container (1) is pressurized by
(4) In the method of extruding copper and copper alloy to the side,
After the end of the extrusion operation, the container (1) is relatively moved toward the die stem (4), and the pressing plate (3) is projected from the opening (1a) of the container (1) on the pressure stem (2) side. After removing the pusher plate (3) and retracting it to the side of the container (1), the pressed cake B 'and the die (5) at the tip of the die stem (4) are sequentially projected from the opening (1a). And remove it.
(3) is reattached to the tip of the pressure stem (2), and the container (1) is moved relatively to the pressure stem (2) side.
The shell C adhered to the inner wall of (1) is peeled off by sliding against the outer peripheral edge of the pressing plate (3) mounted on the tip of the pressure stem (2), and the die (4) side of this container (1) Opening in
(1b) and then the pressure stem from the opening (1b)
(2) The push plate (3) at the tip is projected and removed.

[0011]

The copper and copper alloy extrusion press of the present invention comprises a first pusher for attaching and detaching the pusher plate (3) to and from the tip of the pressure stem (2) near the first opening (1a) of the container (1). The container (1) includes a board loader (6) and a second pusher loader (7) for removing the pusher (3) from the tip of the pressure stem (2) near the second opening (1b). After the extruding operation of the billet B is completed, the pressing plate (3), the pressed cake and the die (5) are removed from the first opening (1a) of the container (1), and then the container (1) is removed. In the vicinity of the first opening (1a), the pressing plate (3) is mounted on the tip of the pressing stem (2) by the first pressing plate loader (5), and the container (1) is connected to the pressing stem (2). By moving the pusher relatively to the side
(3) is passed through the container (1), and the shell attached to the inner wall of the container (1) is scraped off by the outer periphery of the pusher (3), and the second opening (1b) of the container (1) is removed. Discharged from
Subsequently, the pusher plate (3) can be removed from the tip of the pressure stem (2) by the second pusher loader (7) near the second opening (1b). In other words, instead of scraping the shell on the inner wall of the container at the same time as the billet is extruded, the shell is removed after the extrusion operation is completed, so even if the billet temperature during extrusion is as high as 600 ° C to 950 ° C, the shell The life of the removing mechanism can be maintained long.

Further, since the pusher is used as the shell removing mechanism, a cleanout disk, a disk loader and a disk receiver for handling the disk are not required. That is, in the latter method described in the section of [Prior Art], a pusher loader is used as a handling device.
(58), a die receiver (59), a disk loader (61) and a disk receiver (63) are required.However, in the handling device in the press of the present invention, the die receiver and the first and second pusher loaders (21 ) Since only (22) is required, the structure of the extrusion press device can be simplified.

Furthermore, in the extrusion method according to the present invention, since the pusher is used as a shell removing mechanism, the replacement of the shell removing mechanism, which is a consumable part, is performed by a replacement work of the pusher which is always performed after the end of the extrusion operation. And the cycle time can be shortened.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. [FIG. 1] is a partially omitted partially sectional front view of a copper and copper alloy extrusion press according to one embodiment of the present invention, [FIG. 2]
3 is a sectional view taken along the line DD in FIG. 1 and FIG. 3 is a sectional view taken along the line EE in FIG. [FIG. 4] shows one embodiment of the present invention.
It is operation | movement explanatory drawing of the extrusion method of copper and copper alloy which concerns on an Example.

First, the configuration of the extrusion press according to the present embodiment will be described with reference to FIGS. In FIG. 1, (1) is a container, and this container (1) is
It has a cylindrical shape for filling the billet B therein, and is held by a container holder (8) surrounding the outer periphery thereof. On the other hand, the upper and lower parts of the container holder (8)
It is fixed to the tip of two container moving piston rods (9) arranged in parallel with the central axis of (1) (hereinafter referred to as container axis A). The base end of the container moving piston rod (9) is connected to two container cylinder devices (10) (one container cylinder device is not shown), and the container (1) is It moves in the axial direction by the operation of the cylinder device (10).

A main cylinder (12) for moving the main ram (11) for pressurization forward and backward in the direction of the container (1) along the container axis A is disposed between the two container cylinder devices (10). ing. A container is located at the tip of the main ram (11).
One opening (1a) of (1) (hereinafter referred to as a first opening)
A cylindrical pressure stem (2), which is inserted into the cylinder, is detachably attached.

A mandrel device (13) is provided inside the main ram (11). This mandrel device (13)
Is a cylinder chamber (14) provided in the main ram (11), a piston (15) that is moved in the cylinder chamber (14) in the front-rear direction along the container axis A, and the piston (15). A locking rod (15b) provided at the rear part, penetrating the main ram (11) and the main cylinder (12), and having a rear end positioned behind the main cylinder (12); and a locking rod (15b). A mandrel locking device (not shown) connected to the end and a piston rod (15) provided in front of the piston (15).
a), a mandrel holder (16) connected to the tip of the piston rod (15a), and this mandrel holder (16)
And a mandrel (17) detachably attached to the tip of the container. The mandrel (17) extends along the container axis A from the inner hole of the pressure stem (2) by the operation of the piston (15). Move forward and backward.

Reference numeral (18) denotes a press platen. The press platen (18) is disposed at a position facing the main cylinder (12) with the container (1) interposed therebetween, and is disposed diagonally. Four columns parallel to the container axis A (19)
The press platen (18), the main cylinder (12), and the column (19) constitute an apparatus main body (20). In addition, this device body (20)
As shown in FIG. 2 and FIG. 3, the press stand (21)
Is placed on top.

(4) is a die stem. This die stem (4) has a base end fitted to the container (1) side of a through hole (18a) provided in the center of the press platen (18). The cylindrical main body inserted into the other opening (1b) (hereinafter referred to as the second opening) of the container (1) is connected to the container axis A.
Along the container (1).

Reference numeral (22) denotes a shear device, which is provided above the first opening (1a) of the container (1).

In FIG. 1, (3) is a ring-shaped push plate mounted on the tip of the pressure stem (2), and (5) is a ring-shaped die mounted on the tip of the die stem (4). It is. Then, during the extrusion operation, the billet B is arranged between the press platen (3) and the die (5). Although not shown in the figure, the die (5) is connected to the die receiver (2).
The billet B is carried into / out of the container axis A by the billet loader by carrying in / out the container axis A by 8).

In FIG. 2, (6) is a first pusher loader, and this first pusher loader (6) is disposed on the first opening (1a) side of the container (1). And the loader swivel shaft (2) attached to the container holder (8) in parallel with the container axis A.
3) and an arm (24) provided with a scissor-shaped pusher grip (25) at the distal end and rotatably supported at the proximal end on a loader pivot (23).
A pivoting cylinder (26) connecting the rear end of the arm (24) to the container holder (8), and an opening / closing arm provided on the arm (24) for opening and closing the pusher grip (25). Cylinder (27)
It is composed of Under this configuration, the first pusher loader (6) rotates the pusher grip (25) at the tip thereof to advance and retreat on the container axis A, and the first opening of the container (1) opens. Attach the push plate (3) to the tip of the pressure stem (2) in the immediate vicinity of the part (1a).

In FIG. 3, (7) denotes a second pusher loader, which is disposed on the side of the second opening (1b) of the container (1). Have been. Since the second pusher loader (7) has the same configuration as the first pusher loader (6), the same parts with dashes are attached to the same parts, and the description is omitted. This second pusher loader (7)
With the same configuration as the first pusher loader (6), the pusher grip (25 ') at the tip is rotated to advance and retreat on the container axis A, and the second opening of the container (1) is opened. Pressing plate immediately adjacent to section (1b)
Remove (3) from the tip of pressure stem (2).

Next, the operation of the extrusion press of this embodiment will be described with reference to FIG. The main cylinder (12) and the press platen (18) are connected at a fixed distance via four columns (19), and the press platen (18)
The die stem (4) fitted to does not move. on the other hand,
The container (1) is a container cylinder device as described above.
The pressurizing stem which can be moved in the direction of the container axis A by the operation of (10) and which is attached to the tip of the main ram (11).
(2) can be moved in the container axis A direction by introducing hydraulic pressure from a hydraulic device (not shown) to the main cylinder (12).

In the above relationship, the relative movement of the die stem (4) with respect to the container (1) is caused by the movement of the container cylinder device (1).
0), and pressurization of the billet B by the die stem (4) and the pressurizing stem (2) is performed by the main cylinder (12).
The indirect extrusion is performed by synchronizing the movement of the pressurizing stem (2) and the movement of the container (1) by the operation of the container, and the relative movement of the pressurizing stem (2) and the container (1) with respect to the die stem (4). Achieved.

On the other hand, as described above, the mandrel (17) moves the container axis A by the operation of the mandrel device (13).
Move in the direction. That is, when the piston (15) moves forward, it protrudes forward from the pressure stem (2).
(2) is stored inside.

Next, a series of cycles of the method for extruding copper and copper alloy of the present embodiment will be described with reference to FIG. In FIG. 4, the components denoted by the same reference numerals as those in FIGS. 1 to 3 have the same configurations as those shown in FIGS. 1 to 3.

Here, FIG. 4 shows the state when the tubular product is extruded. In the tubular product P, the mandrel (17) is protruded from the pressure stem (2) and is shown in FIG. Thus, it is extruded in a state of protruding through the inner hole of the ring-shaped push plate (3).

(A) After the end of the extruding operation shown in the figure, the mandrel (17) is stored in the pressure stem (2) while the container is
(1) is relatively moved in the direction of the die stem (4). And
By this relative movement, the pressing plate (3) is moved to the first position of the container (1).
The first pusher loader (6) provided on the side of the first opening (1a) grips the pusher (3) and holds the container outside the container axis A. (1) Rotate and retract to the side.

Thereafter, the container (1) is further die-stemed.
(4) By moving the container relative to
The debris B 'and the die (5) are protruded from the first opening (1a) of (1), and a shearing device provided above and near the same.
(22) and the die receiver (28), the debris B 'and the die (5) are sequentially removed as shown in FIGS. To be carried out.

After removing the pressing plate (3), the debris B 'and the die (5), the container (1) is relatively moved in the direction of the pressure stem (2) as shown in FIG. First pusher loader
By actuating (6), the gripping platen (3) gripped is rotated and returned on the container axis A, and mounted on the tip of the pressure stem (2).
Next, the pressing plate (3) is further moved by relatively moving the container (1) in the direction of the pressure stem (2).
To the second opening (1b). At this time, the pressing plate (3) slides along the inner wall of the container (1), and the shell C attached to the inner wall of the container (1) is scraped off at the outer peripheral edge thereof, and is removed. e) Discharge from the second opening (1b) of the container (1) as shown in the figure.

Subsequently, the second opening (1b) of the container (1)
The pusher plate (3) projecting from the container is moved out of the container axis A by a second pusher loader (7) provided on the second opening (1b) side of the container (1) as shown in FIG. And a series of cycles is completed.

Here, it is needless to say that the present embodiment is an example for promoting understanding of the present invention and does not limit the scope of right. First, the present embodiment is directed to indirect extrusion, but the present invention is also applicable to direct extrusion.

The present invention is also used for extrusion of a rod-shaped product. The rod-shaped product is extruded without using the above-mentioned mandrel (16), and is similar to the extrusion of a tubular product. Therefore, the description is omitted.

In this embodiment, the die stem
(4) was fixed and extrusion was performed by moving the pressure stem (2), but if the pressure stem (2) was fixed and the die stem (4) was moved and extruded, they were also moved. It may be extruded.

Further, the push platen (3) mounted on the tip of the pressure stem (2) for removing the shell C remounts the push plate (3) taken out of the container (1) after the end of the extruding operation. Or you can attach another pusher.

[0037]

As described above, the copper and copper alloy extrusion press according to the present invention does not scrape the shell on the inner wall of the container at the same time as the billet is extruded, but removes the shell after the end of the extrusion operation. Therefore, even if the billet temperature during extrusion is as high as 600 ° C. to 950 ° C., the life of the shell removing mechanism can be maintained long. In addition, since a cleanout disk for removing the shell, a disk loader and a disk receiver for handling the disk are not required, the structure of the extrusion press device can be simplified.

Further, in the extrusion method according to the present invention, since the shell removing mechanism can be performed by the work of exchanging the pusher plate which is always performed after the end of the extrusion operation, the effect of shortening the cycle time can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially omitted partially sectional front view of a copper and copper alloy extrusion press according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line DD in FIG. 1;

FIG. 3 is a sectional view taken along the line EE of FIG. 1;

FIG. 4 is an operation explanatory view of a copper and copper alloy extrusion method according to one embodiment of the present invention.

FIG. 5 is an operation explanatory view of a conventional extrusion method using a cleanout disk.

[Explanation of symbols]

 (1) --Container (1a)-First opening (1b)-Second opening (2) --Pressure stem (3) --Pressing plate (4) --Die stem (5) --Die (6) --First pusher loader (7) --Second pusher loader A--Container axis B--Billet C--Shell

Claims (2)

(57) [Claims] 1. A cylindrical container (1) movably disposed in an axial direction and loaded with a billet B therein, and said container
Pressing stem (2) inserted from the first opening (1a) of (1)
And a pressing plate detachably attached to the tip of the pressure stem (2).
(3), a die stem (4) inserted from the second opening (1b) of the container (1), and a die (5) removably attached to the tip of the die stem (4). Become, pressure stem
(2) and the die stem (4) are opposed to each other and inserted into the container (1), and the billet B loaded in the container (1) is added between the presser plate (3) and the die (5). In a copper and copper alloy extrusion press that presses and extrudes to the die stem (4) side, the pressing plate (3) is attached to and detached from the tip of the pressure stem (2) near the first opening (1a) of the container (1). The first pusher loader (6) and the second
The second pusher loader (7) for removing the pusher (3) from the tip of the pressure stem (2) near the opening (1b) of the container (1)
An extrusion press for copper and a copper alloy, the base end of which is rotatably supported and provided integrally with the container (1). 2. A pressure stem having a push plate (3) mounted at its tip.
(2) and die stem (4) with die (5)
By inserting the cylindrical container (1) arranged movably in the axial direction from the openings (1a) (1b) at both ends of the cylindrical container (1),
In the method for extruding copper and a copper alloy, in which the billet B loaded in the container (1) is pressed and extruded toward the die stem (4), after the end of the extruding operation, the container (1) is
(4) Move relatively to the side, and pressurize stem (2) of container (1)
Push the push plate (3) from the opening (1a) on the side
, And retreating to the side of the container (1), then pushing out the debris B 'and the die (5) at the tip of the die stem (4) from the opening (1a) in order, and then removing The push platen (3) is reattached to the tip of the pressure stem (2), and the container (1) is relatively moved to the pressure stem (2) side so that the shell C adhered to the inner wall of the container (1) is removed. The pressure stem (2) is peeled off by sliding against the outer periphery of the pressing plate (3) attached to the tip, and is discharged from the opening (1b) on the die stem (4) side of the container (1). And a push plate (3) at the tip of the pressure stem (2) protruding from the opening (1b) to remove the push plate (3).