JPH0832337B2 - Extrusion press container replacement method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is to extrude a billet held by an inner hole of a container body fitted with an inner hole of a container holder from an hole of a die by pushing the billet. The present invention relates to an extruding press for obtaining a product and a container exchanging method for exchanging a container body when a size of a billet is changed.

[Prior Art] FIG. 5 is a cross-sectional view of a conventional extrusion press machine.

An extrusion press of this type is conventionally generally configured as follows. That is, the extrusion press includes a crosshead that is driven by the main ram to advance and retreat in the axial direction, and an extrusion stem that is concentric with the crosshead and that advances and retracts integrally with the crosshead. In the department,
Loose dummy is installed. On the other hand, a die having an extrusion hole is fixedly provided on the machine base side concentrically in the forward direction of the extrusion stem, and the extrusion stem side of this die can be inserted into and removed from the container holder and its inner hole. A container formed by the container body fitted to the base is supported on the machine base side adjacent to the die. Between the container and the extrusion stem, a billet loader device having a billet loader mounted on the tip of a piston rod arranged in engagement with a hydraulic cylinder is fixed, and when pressure oil is introduced into the hydraulic cylinder,
It is configured to slide on the guide rail from a billet replenishing position to the billet loader shown in the figure to a central region where the axis of the container hole and the axis of the billet coincide.

By being configured in this way, after moving the billet to the concentric position with the container with the billet loader,
When the billet loader is moved out of the machine and the extrusion stem is moved forward integrally with the crosshead, the billet enters into the inner hole of the container body.When the extrusion stem is moved further forward, the billet is pushed into the extrusion hole of the die. Is extruded to obtain a product.

If the size and shape of the billet are changed, connect the crosshead and the container body with a wire, etc., and retract the crosshead to pull it out from the container holder. When the wire on the crosshead is switched from the wire on the crosshead side to the wire on the crane and the wire of the crane is wound, the container body is pulled out from the container holder and hung by the crane. The suspended container body is taken out of the machine as it is, or it is transported by a crane in advance and is transported on a trolley that has been waiting on the floor. After that, a new container body is mounted in the container holder by the operation reverse to the above.

In addition, the above described the direct type extrusion press in which the container does not move at the time of extrusion, but in the indirect type extrusion press in which the container holding this is moved together with the movement of the billet for extrusion, the container body The exchange operation is performed according to the above.

[Problems to be Solved by the Invention] As described above, in the conventional container exchanging device for the extrusion press, after the container body is pulled out from the container holder each time the container body is exchanged, the container is mounted on the carriage provided in the extrusion press device. Place it once and then hang it with a crane to move it to the desired position, or hang the dolly itself with the crane and place it on the specified position of the extrusion press device, then remove the container body from the container holder and temporarily Since the container body was exchanged by placing it on the top and then moving the container body by hanging it with a crane, the work was troublesome and took a long time, and the preparation time was extended and the productivity decreased. There is a problem of doing.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a container replacement method for an extrusion press that enables easy container replacement work in a short time.

[Means for Solving the Problems] In order to achieve such an object, according to the present invention, a double end is provided on a side end portion on a guide rail for a billet loader provided in a machine width direction between a container and an extrusion stem. A rod type cylinder is provided, and the tip of the billet loader mounting table having an L-shaped tip is fixed to the tip of the double rod engaged with the double rod type cylinder, and the billet loader mounting table is also provided. The billet loader with the billet mounted on is fixed to the extrusion position by advancing and retracting from the standby position to the center of the extrusion press.When replacing the container, the billet loader is completely retracted to the standby position and the container body is moved to the container. The container body was pulled out from the holder and once placed on the billet loader guide rail, and then the container body was carried out of the machine.

[Operation] When replacing the container, move the crosshead forward to connect the crosshead and the container body with the connecting device,
Next, the crosshead is retracted and placed on the billet loader guide rail at a position where the container body is pulled out from the container holder by a predetermined amount. Next, the hanging metal fittings were attached and the wires of the crane were hooked so that the crane could be carried out of the machine. Therefore, a dolly becomes unnecessary, and the preparation time is greatly reduced. When the new container body is attached to the container holder, it is possible by the reverse procedure described above.

[Embodiment] FIGS. 1 to 3 show an embodiment according to the present invention.
Fig. 1 is a front view of the entire extrusion press, and Fig. 2 is II of Fig. 1.
-II is a transverse cross-sectional view of the extrusion press machine seen from II,
Figure (a) shows the billet loader standby position, Figure 2 (b) shows the state where the axis of the container and the billet are aligned, Figure 3 is an operation diagram of removing the container body from the container holder, and Figure 4 is The front view of the connecting device for connecting a crosshead and a container main body is shown.

As shown in FIG. 1, the extrusion press 1 includes a cylinder platen 3 and an end platen 4 which are provided upright on the head 2 so as to face each other. These platens 3 and 4 have tie rods 5 at four corners. Are connected by. A main ram 6 as a drive device is fixed to the cylinder platen 3, and an extrusion stem 8 having a loose dummy attached to a tip end thereof 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 slide attached to the end platen 4
A die stem (not shown) is fixed to the inner hole of 10, and a hole is provided through the axial center of the die stem, and an extrusion hole is provided at a position adjacent to the rear end of the die stem. The die is fitted and fixed. At a position adjacent to the rear end of the die, a container 13 that moves forward and backward in the axial direction by a cylinder (not shown) is arranged.
Is a container holder 13a supported by the cylinder,
It is formed with a container body 13b fitted in the inner hole so as to be freely inserted and removed. Furthermore, the container body 13b is formed of a container tire 13c that fits into the inner hole of the container holder 13a and a container liner 13d that fits the inner hole into the container tire 13c. Reference numeral 14 is a heater housed in the hollow portion of the container holder 13a.

Reference numeral 20 denotes a billet loader device, which is composed of an open / close type billet loader 21, a cylinder 22, a piston rod 23, a billet loader mounting table 24, a double rod type cylinder 25, and a billet loader guide rail 26.

When pressure oil is introduced into the rod 23 side or the head side of the piston engaged with the cylinder 22, the piston rod 23 moves forward /
The retractable billet loader 21 is configured to open and close with the backward movement.

Further, the open / close type billet loader 21 is fixedly mounted on a billet loader mounting table 24 having an L-shaped tip, and a double rod 25a (which engages with the distal end portion of the billet loader mounting table 24 and the double rod type cylinder 25 ( The tip of a rod) having a joint rod shape and extending and contracting in its entire length by the method of introducing pressure oil is fixed. In such billet loader device 20, the billet 15 is placed on the openable billet loader 21, and then,
Introducing pressure oil into the double rod type cylinder 25 causes double rod
25a gradually expands, the billet 15 moves from the standby position outside the machine to the billet loader mounting table 24 along the guide rail 26 for the billet loader until the axis of the billet 15 and the axis of the hole of the container liner 13d in the container 13 are aligned. Will slide.

Then, after the billet 15 is conveyed to a position where the billet 15 is concentric with the axis of the container 13, when the extrusion stem 8 is driven by the main ram 6, the billet 15 is inserted into the inner hole of the container body 13b and then extruded. It is configured to be compressed by the stem 8 and extruded as a product from the extrusion hole of the die into the hole of the die stem 27. Reference numeral 19 denotes a shear lifting cylinder fixed to the end platen 4 side, and a shear blade is fixed to the piston rod of the shear lifting cylinder. The push rod is moved up and down to shear the extrusion cake. There is.

Further, a connecting device 60 is provided between the crosshead 9 and the container body 13b to detachably connect them. That is, a pair of left and right fixed pins 30 with a handle 29 are pivotally supported in the front surface region of the crosshead 9 so as to be rotatable and movable back and forth in the axial direction, and an oval head 30a formed at one end thereof is , The oval hole 31a provided on the container body 13b side, and by grasping the handle 29 to rotate and move the fixing pin 30 forward and backward, the container body
13b and the crosshead 9 are fixed, or the fixing pin 30 is removed so that the fixing is released.

The container exchanging operation of the extrusion press configured as described above will be described.

The extrusion stem 8 is removed from the crosshead 9 when the container 13 is fixed at the forward limit position. While removing the thermocouple attached to the container tire 13c, the heater wiring on the end surface on the die side, the air cooling pipe, etc., move the crosshead 9 forward to slightly push the container main body 13b to move the container holder 13a and the lock ring 38 together. When the lock ring 38 is removed by widening the gap so that the lock ring 38 can be easily removed, the connection between the container holder 13a and the container body 13b is released.

Next, the crosshead 9 from which the extruding stem 8 has been removed in advance is advanced to a desired position, and then the handle 29 is grasped to move the fixing pin 30 to the container 13 side, and then the rotary operation is performed. The crosshead 9 and the container body 13b are connected by the action of the oval hole 31a. Then, when the crosshead 9 is retracted, the container body 13b
Is pulled out from the container holder 13a to the position shown in FIG. 3 (d) and placed on the billet loader guide rail 26.

Therefore, the hanging metal fitting 39 is attached to the container body 13b, and the wire of the crane is hooked on the container body 13b and wound up until the wire is stretched, and the container body 13b is transported to the outside of the machine.

When installing a new container body 13b, use the crane to carry the container body 13b.
When mounting on the 3a, the container body 13b is once placed on the billet loader guide rail 26.

After that, attach the crosshead 9 to the container body with its front end surface
It is moved until it hits 13b, and both are connected by a connecting device 60. In addition, connect the container body 13b to the container holder 1
Remove the hanging bracket 39 at the position where it was inserted partway into the inner hole of 3a.
Next, the crosshead 9 is further advanced to move the container body.
13b is completely inserted into the inner hole of the container holder 13a, and the container replacement work is completed.

In this embodiment, the present invention is shown as an example in which the present invention is applied to a direct extrusion press, but the present invention can also be applied to an indirect extrusion press in which extrusion is performed while moving the container at the same time as moving the billet. , The same effect can be obtained.

[Effects of the Invention] As is apparent from the above description, according to the present invention, the double rod cylinder is provided at the side end portion on the guide rail for the billet loader provided in the machine width direction between the container and the extrusion stem. A billet loader mounting table having an L-shaped tip is fixed to the tip of the double rod engaged with the double rod type cylinder, and the billet is mounted on the billet loader mounting table. When the container is replaced, the billet loader is fixed to the standby position and the billet loader is completely retracted to the standby position, and the container body is pulled out from the container holder. Once the container body is carried out of the machine after being placed on the billet loader guide rail, Since there is no need to transport it to the side, etc., the preparation time is greatly shortened, productivity is improved and labor is reduced, the temperature drop of the preheated container body is reduced, and the heating time after replacement is shortened. Further, productivity is improved.

[Brief description of drawings]

1 to 3 show one embodiment according to the present invention. FIG. 1 is a front view of the entire extrusion press, and FIG. 2 is II- of FIG.
FIG. 2 is a cross-sectional view of the extrusion press machine seen from II, FIG. 2 (a) shows a billet loader standby position, FIG. 2 (b) shows a state where the axis of the container body and the billet are aligned, and FIG.
The figure is an operation diagram of pulling out the container body from the container holder,
FIG. 4 shows a front view of a connecting device for connecting the crosshead and the container body. Further, FIG. 5 shows a cross-sectional view of a conventional extrusion press machine. 1 ... Extrusion press, 8 ... Extrusion stem, 9 ... Crosshead, 13 ... Container, 13a ... Container holder, 13b ... Container body, 15 ... Billet, 19 ... Shear lifting cylinder, 20 ... Billet loader device, 21 …… Opening / closing type billet loader, 24 …… Billet loader mounting table, 25 …… Double rod type cylinder, 26 …… Billet loader guide rail, 27 …… Diestem, 60 …… Coupling device.

Claims (1)

[Claims] 1. A double rod type cylinder is disposed at a side end portion on a guide rail for a billet loader provided in the machine width direction between a container and an extrusion stem, and engages with this double rod type cylinder. The tip of the billet loader mounting table having an L-shaped tip is fixed to the tip of the double rod, and the billet loader mounting the billet on the billet loader mounting table is fixed to push the extrusion press from the standby position. Using an extrusion press device that is capable of advancing and retracting to the central position, when replacing the container, the billet loader is completely retracted to the standby position, and the container body is pulled out from the container holder,
A container replacement method for an extrusion press, wherein the container main body is carried out of the machine after being once placed on the billet loader guide rail.