JP3169509B2 - Hydrostatic extrusion press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrostatic extrusion press.

[0002]

2. Description of the Related Art A hydrostatic extrusion press loads a billet, a pressure medium, and a seal piston into a container, and presses them into a die by a pressure stem which is advanced and retracted by a hydraulic cylinder or the like. It has been made to form strips and wires, and various attempts have been made to shorten the cycle time to prevent cooling of heated billets and improve productivity. (For example, Japanese Patent Publication No. 55-17644, in which a billet, a pressure medium, and a seal piston are simultaneously loaded).

[0003]

When a billet or the like is loaded, the stem is separated from the container, and a distance between the two is equal to or greater than the sum of the respective lengths of the billet, the pressure medium, and the seal piston. There is a need. for that reason,
The operating distance of the stem has been increased, which has been a great bottleneck for shortening the cycle time.

[0004] The present invention has been made in view of the above circumstances, and has as its object to provide a hydrostatic extrusion press capable of further promoting a reduction in cycle time.

[0005]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, in the present invention, in a hydrostatic extrusion press in which a billet, a pressure medium, and a seal piston are loaded into a container and a die is pressed by a pressure stem, the billet is positioned with respect to the center of the inlet portion of the container. A billet supply device for supplying, a seal piston, and a seal piston supply device for supplying a pressure medium are separately provided so as to be able to perform supply operations, and both these devices can be advanced and retracted along the pushing direction of the pressure stem. It is characterized by having.

The billet supply device is configured to be able to advance and retreat along an advance / retreat support shaft provided in parallel with the pushing direction of the pressurizing stem outside the entrance of the container, and to be capable of swinging about the advance / retreat support shaft. A swing arm provided, and a billet holding portion provided at a position crossing the center of the entrance of the container at the distal end side of the swing arm. A swing arm provided coaxially with the swing arm of the billet supply device so as to be able to advance and retreat along the axis and to be swingable about the advance and retreat support shaft; and a container inlet at a tip end side of the swing arm. And a seal piston holding portion provided at a position crossing the center.

[0007] The billet supply device and the seal piston supply device are connected via a connecting portion that allows the swinging arms to swing individually but keeps the swinging arm integrally, so that a common drive source is provided. , So that it can be driven forward and backward.

[0008]

According to the billet supply device and the seal piston supply device, the operation of supplying the billet or the operation of supplying the seal piston toward the center of the entrance of the container can be performed separately. During the operation, the other device can be retracted to the outside of the container entrance.

Further, since each of these devices can move forward and backward along the pushing direction of the pressurizing stem, the space for separating the pressurizing stem from the container is not limited to the space necessary for the billet supplying device to perform the supplying operation. If there is (usually, because the billet supply device is larger, but not limited to this), the billet supply device and the seal piston supply device can be exchanged for this space.

That is, the interval for moving the pressure stem away from the container (operating distance of the pressure stem) can be shortened accordingly. In the billet supply device and the seal piston supply device, the shaft that moves forward and backward and the shaft that performs the supply operation (oscillation shaft) are made coaxial, and the drive source for moving forward and backward is shared, so that the size of the device can be reduced. Can be planned.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a plan view showing the hydrostatic extrusion press 1 according to the present invention, wherein 2 is a container having an entrance 2a on the right side of the drawing, and 3 is a die (see reference numeral 3a in FIG. 1) set therein. It is a molded part. Reference numeral 4 denotes a pressurizing stem which is driven by a pushing force generating device 5 such as a hydraulic cylinder to perform a pushing operation toward the container 2. The die 3a of the forming unit 3 is slidably mounted on the front frame 6 via a slide in a direction orthogonal to the pressing direction.
And the front and rear frames 6 and 7 are connected to each other by a connecting rod 8.

At the side (lower side in FIG. 2) of the inlet 2a of the container 2, an advance / retreat support shaft 10 parallel to the pushing direction of the pressure stem 4 and an auxiliary parallel to the advance / retreat support shaft 10 at a predetermined interval. A rail 11 is provided. A billet supply device 15 and a seal piston supply device 16 are provided for the advance / retreat support shaft 10 and the auxiliary rail 11.

The billet supply device 15 includes an advance / retreat support shaft 10.
FIG. 3 is a perspective view of the frame 20 which is bridged between the frame and the auxiliary rail 11 and held movably in their longitudinal direction.
As shown in the figure, a swing arm 22 having a billet holding portion 21 at the tip end is provided so as to be swingable in a rising direction. The swing arm 22 swings about the advance / retreat support shaft 10. Reference numeral 25 denotes a fluid pressure (hydraulic) cylinder for driving the swing arm 22 to swing. The billet holding portion 21 is provided at a position where the billet W crosses the center of the entrance portion of the container 2 when the swing arm 22 swings, and automatically holds and releases the billet W in a clamp shape. It is possible to do it. 26
Is a fluid pressure (hydraulic) cylinder for clamping operation.

Reference numerals 27 and 28 denote running wheels, and when the swing arm 22 is raised (indicated by a two-dot chain line in FIG. 3), it comes into contact with the side surface and the upper surface of the bed 29 on the apparatus main body side to form a billet. While the holding position of the holding portion 21 is accurately and stably held, the advancing and retracting movement is guided. Reference numeral 30 denotes a stopper, which comes into contact with the rail-side guide piece 20a of the frame 20 when the swing arm 22 is in the upright posture (indicated by a solid line in FIG. 3), and a billet heating device or the like (not shown) Can be positioned for delivery of the billet W from the company.

The seal piston supply device 16 is shown in FIG.
As shown in the figure, the billet supply device 15 has basically the same configuration as that of the billet supply device 15, and is bridged between the advance / retreat support shaft 10 and the auxiliary rail 11 so as to be held movably in the longitudinal direction thereof. A swing arm 35 having a seal piston holding portion 34 at the distal end is provided on the frame 33 so as to be able to swing in the elevation direction. The only difference between the seal piston supply device 16 and the billet supply device 15 is the dimensional difference of each part related to the dimensional difference between the seal piston (not shown) and the billet W, and therefore detailed illustration and description thereof are omitted. I do.

The billet supply device 15 and the seal piston supply device 16 are connected by connecting portions 37, 38 between adjacent frames 20, 33. The outside portion (right side in FIG. 2) of the frame 20 of the billet supply device 15 is provided with a drive source 4 using a fluid pressure (hydraulic) cylinder or the like.
0 is connected. Therefore, both the billet supply device 15 and the seal piston supply device 16 are integrally driven by the drive source 40. Of course, these connecting portions 37 and 38 do not restrict the swing of the swing arms 22 and 35 at all.

Although not shown, the drive source 40 has a structure in which a rack is fixed to the reciprocating support shaft 10 side and a binion meshed with the rack is rotated by a motor mounted on the frame 20 or 33. It is also possible to replace with In the case of loading the billet W into the container 2 in the hydrostatic extrusion press 1 thus configured, FIG.
As shown in (a), the seal piston supply device 16 is retracted to the side of the container 2, and the billet supply device 15 is positioned facing the entrance 2 a of the container 2 so as to face the billet supply device. The supply operation is performed for only the number 15. By doing so, the interval S1 (operating distance of the pressurizing stem 4) for separating the pressurizing stem 4 from the container 2 is slightly larger than the width of the billet supplying device 15 (allowing for the operational clearance of the billet supplying device 15). Is sufficient).

On the other hand, when subsequently loading the seal piston P and the pressure medium M into the container 2, FIG.
As shown in (b), the billet supply device 15 is retracted to the side of the container 2 and the seal piston supply device 16 is positioned facing the inlet 2a of the container 2 so as to face the seal piston. The supply operation is performed only to the supply device 16. Therefore, in this case, container 2
S2 (the pressure stem 4
(The operating distance of the seal piston supply device 16) is slightly larger than the width of the seal piston supply device 16 (to the extent that the operation clearance of the seal piston supply device 16 is secured).

After the charging of the billet W, the seal piston P and the pressure medium M is completed, both the billet supply device 15 and the seal piston supply device 16 are moved outward from the inlet of the container 2 as shown in FIG. The pushing force generator 5 is operated after being retracted. By the way, in the present invention, the billet supply device 15 and the seal piston supply device 16 have a configuration in which the swing arms 22 and 35 have different advance / retreat axes and operation axes (oscillation axes) from each other. , 35 (such as performing a horizontal in / out operation). Further, the seal piston supply device 16 may have a configuration in which the pressure medium M is not loaded (a configuration in which the pressure medium M loading device is provided separately and independently).

In the case of forming a hollow strip, the pressure stem 4 may be formed as a hollow cylinder into which a mandrel is inserted. The fluid pressure cylinder 25 for swinging the swing arms 22 and 35 and the fluid pressure cylinder 26 for performing a clamping operation in the billet holding portion 21 and the seal piston holding portion 34 are also engaged with the rack and the pinion. A mechanism in which a mechanism, a gear mechanism, a crank mechanism, and the like are driven by a motor (electrically or hydraulically) can be replaced.

[0021]

According to the present invention, the billet supply device and the seal piston supply device are capable of performing each supply operation individually, and have the above-mentioned structure.
Since each of these devices is provided so as to be able to advance and retreat along the pushing direction of the stem, when one of the devices is performing a supply operation, the other device is retracted to the outside of the entrance of the container. be able to. Therefore, the interval for separating the pressure stem from the container can be shortened as much as possible, and the operating distance of the pressure stem, that is, the time required for the operation of the pressure stem can be shortened. Therefore, the cycle time can be reduced.

In addition, since the operation stroke of the pressure stem can be reduced, the size of the apparatus can be reduced. In the billet supply device and the seal piston supply device, the axis that moves forward and backward and the axis that performs the supply operation (oscillation axis) are made coaxial, and the forward and backward drive sources are shared, thereby further reducing the size of the device. Can be achieved.

[Brief description of the drawings]

FIG. 1 is an operation explanatory view of a hydrostatic extrusion press according to the present invention.

FIG. 2 is a plan view showing a partially crushed hydrostatic extrusion press according to the present invention.

FIG. 3 is an enlarged view taken on line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydrostatic extrusion press 2 Container 3a Die 4 Pressurization stem 10 Reciprocating and supporting shaft 15 Billet supply device 16 Seal piston supply device 21 Billet holding unit 22 Swing arm 34 Seal piston holding unit 35 Swing arm 37 Connecting unit 38 Connecting unit 40 Drive source

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21C 23/21 B30B 11/22

Claims (3)

(57) [Claims] 1. A static pressure device wherein a billet (W), a pressure medium (M), and a seal piston (P) are loaded into a container (2) and pressed against a die (3a) by a pressure stem (4). In a hydraulic extrusion press, a billet supply device (15) for supplying a billet (W) to the center of an inlet (2a) of a container (2), a seal piston (P), and a seal piston supply for supplying a pressure medium (M). The apparatus (16) is provided so as to be capable of supplying each separately, and both of these apparatuses (15, 16) are capable of moving forward and backward along the pushing direction of the pressure stem (4). Hydrostatic extrusion press. 2. The billet supply device (15) includes a reciprocating bearing shaft (10) provided parallel to a pushing direction of a pressure stem (4) outside an inlet (2a) of a container (2). A swing arm (22) provided to be able to advance and retreat along the advance and retreat support shaft (10), and an inlet portion (2) of the container (2) at the tip end side of the swing arm (22). 2
a) A billet holding portion (2) provided at a position crossing the center.
1) and the seal piston supply device (1).
6) is provided coaxially with the swing arm (22) of the billet supply device (15) along the advance / retreat support shaft (10) so as to be able to advance and retreat, and to be swingable about the advance / retreat support shaft (10). Swing arm (35) and the swing arm (3
5) a seal piston holding portion (34) provided at a position crossing the center of the entrance (2a) of the container (2) on the tip side of the container (2).
3. The hydrostatic extrusion press according to claim 1, comprising: 3. The billet supply device (15) and the seal piston supply device (16) allow their oscillating arms (22) and (35) to oscillate individually, but advance and retreat are integrally held. 3. The hydrostatic extrusion press according to claim 2, wherein the presses are connected via connecting portions (37) and (38) and are driven forward and backward by a common drive source (40).