JPH05329533A - Mandrel changing device of extruding press - Google Patents

Abstract

PURPOSE:To shorten a change time, and to improve change workability by constituting a change cart so as to be runnable and transferable onto a billet loader, so that a mandrel can be changed by a transverse movement by the billet loader. CONSTITUTION:After an ascending/descending rack base 26 on which a change cart 30 is loaded is allowed to ascend, the change cart 30 is run by a driving device provided on the ascending/descending rack base 26, and transferred to a billet loader 18. The connection of the driving device of the ascending/descending rack base 26 and the change cart 30 is detached, and the billet loader 18 is subjected to transverse movement along common rails 16, and stopped in a center position of the extruding press. By operating an ascending/descending handle of the change cart 30, centering an extruding stem 12 is executed, and from the extruding stem 12, a mandrel 14 is drawn out by removing its screw, and loaded onto the change cart 30. The billet loader 18 is moved to the extruding press side and returned to a stand-by position, and in a state that the mandrel 14 remains loaded, the change cart 30 is moved to the ascending/descending rack base 26. The mandrel 14 is carried over by a hoist, and thereafter, the ascending/descending rack base 26 is allowed to descend and returned to its initial state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mandrel exchanging device for an extrusion press, and more particularly to improvement of the exchanging device for improving exchanging workability.

[0002]

2. Description of the Related Art The mandrel of an extrusion press is appropriately replaced by changing the extruded product, and a mandrel replacement device is used for this replacement. The conventional mandrel exchanging device is arranged on the opposite side of the extrusion press, that is, at the press side position opposite to the place where the press operation control board is installed, and at least a pair of Xs supporting the mandrel.
It is equipped with a dolly with opening and closing links in the shape of a letter. The opening / closing link is adapted to open and close the upper leg portion so that it can be adapted to the diameter of the mandrel, and a rotary roller is attached to the tip of the open leg portion which comes into contact with the mandrel so as to make a rotary contact. In addition, the dolly can be raised and lowered, and the centering to the press center is adjusted by the lifting device. Further, the carriage can be moved laterally in a direction orthogonal to the press center, and can be moved using a common rail commonly used with a billet loader and the like.

[0003]

However, since the conventional mandrel exchanging device is laid out on the side opposite to the operating side of the extrusion press, it has the drawback of poor operability. Therefore,
Although it is desirable to install a mandrel changing device on the operating side, it interferes with the frame of the billet loader,
Further, if the layout is designed so as not to interfere with each other, the structure of the billet loader becomes complicated, and there is a problem that the exchange device projects to the outside of the machine and requires a lot of space. And
There is a problem that a special traveling switching mechanism for traveling the exchanging device and the billet loader on the common rail is required, and a stopper mechanism for positioning them is also required.

Further, in the mandrel exchanging device having the conventional structure, the mandrel is supported by an X-shaped opening / closing link having a rotating roller at the tip thereof, and the mandrel is rough due to the surface roughness of the rotating roller or the presence of adhering substances. There was also a problem that the centering was not performed properly.

In the present invention, focusing on the above-mentioned problems, it is possible to improve mandrel exchange workability while maintaining a compact layout, and easily perform centering of the mandrel and the press center. An object is to provide a mandrel changing device.

[0006]

In order to achieve the above object, a mandrel exchanging device according to the present invention has an elevating stand arranged vertically in a standby position of a billet loader capable of moving in and out of an extrusion line of an extrusion press. , The lifting platform is equipped with a mandrel exchanging carriage equipped with a mandrel, and the mandrel exchanging cart is equipped with an elevating frame on which the mandrel is directly mounted, and the exchanging cart can be transferred to the billet loader. The mandrel can be exchanged by the traverse movement by the billet loader.

[0007]

According to the above construction, the billet loader is used to move the mandrel to the press center for replacement work. Therefore, it is not necessary to provide a positioning stopper or the like, and the layout is provided on the operating side of the extrusion press. Therefore, the mandrel replacement workability can be improved. In addition, an exchange trolley equipped with a mandrel moves between an elevating stand and a billet loader, and since the trolley has a mandrel elevating frame that can be raised and lowered on the trolley, a comparison is made with the mandrel alone being raised and lowered. Therefore, the mandrel center does not swing to the left or right when moving up and down, so that the centering work with the extrusion press center can be performed reliably and easily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the mandrel exchanging device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic side view and a front view showing the overall structure of the mandrel changing device and an extrusion press, and FIG. 2 is a schematic plan view. As shown in these figures, the extrusion press is equipped with a container 10 in which a billet is loaded and an extrusion stem 12 arranged to face the container 10. The mandrel 14 to be replaced is placed inside the extrusion stem 12. I try to put on and take off. Further, a common rail 16 is provided between the container 10 and the extrusion stem 12 for loading the billet so as to be orthogonal to the press center C. The operating side of the common rail 16, that is, the press operation panel. A billet loader 18 is arranged on the installation side of the billet so that the billet can be loaded by transverse movement to the press center. A die take-out device (dummy block exchanging device) 20 is arranged on the other end side of the common rail 18, and is configured to traverse between the press center and the common rail 16 in the same manner.

In such a press configuration, the billet loader 1 is at the standby position of the billet loader 18.
8 and the mandrel exchanging devices 22 are installed in a column. As shown in FIG. 1, the mandrel exchanging device 22 includes an elevating / lowering platform 26 that is vertically moved with respect to a fixed platform 24, and the mandrel 14 to be exchanged is directly mounted on the elevating / lowering platform 26. It is configured to be equipped with a mandrel exchanging cart 30 to be used.

First, the elevating mount 26 has a U-shaped cross section, and is connected to an elevating cylinder mechanism 32 attached to a lower fixed mount 24 so that it can be driven up and down. In addition, a plurality of guide rods 34 are attached to the bottom surface of the elevating stand 26, and the guide rods 34 are passed through the fixed stand 24 to guide up and down. Therefore, the lifting / lowering base 26 is driven up and down by the drive of the cylinder mechanism 32, and the mandrel 14 mounted on the exchange carriage 30 placed on the upper part can be set at the height position of the press center. In addition, inside the lifting platform 26, the screw rod 3 is
6 is rotatably supported, and one end thereof is connected to a motor 38 attached to the lower surface of the end of the elevating stand 26 and a chain 40 so that rotation can be transmitted. And the screw rod 36
A moving nut 42 is screwed onto the shaft, and can be moved back and forth by the rotation of the screw rod 36. A detachable connecting member 44 for connecting to the mandrel exchanging carriage 30 mounted on the lifting mount 26 is attached to the moving nut 42, so that the carriage 30 is driven to move on the lifting mount 26 by driving the motor 38. ..

Next, a specific structure of the mandrel exchanging truck 30 will be described with reference to FIGS. This exchange cart 30
Is a carriage main body 46 having a substantially U-shaped or V-shaped cross section, and a mandrel 14 mounted directly inside the main body 46 of the carriage and having a substantially U-shaped or V-shaped cross section. The lifting frame 48 is formed.

The carriage main body 46 is provided with a plurality of wheels 52 on the lower surfaces of the side edge frames 50 so as to be able to travel, and a rail plate 54 provided on the upper surface of the side wall of the elevating stand 26 and the upper side edges of the billet loader 18 (see FIG. 4). (See (2))
It is possible to travel between the lifting platform 26 and the billet loader 18. The wheels 52 arranged on one side are driving wheels, which are made by winding a chain 56 around a sprocket 54 attached to an axle, and sprocket 56
On the other hand, the rotational operation of the traveling handle 58 attached to the side edge frame 50 of the carriage main body 46 is transmitted. Further, a side guide roller 59 is attached to the wheel 52, and the side guide roller 59 is arranged so as to be in rolling contact with the outer surface of the rail plate 54 to prevent lateral shake of the carriage main body 46. For this reason, the trolley body 46 can be self-propelled by operating the traveling handle 58, which is used during adjustment movement, and is used for movement between the elevating platform 26 and the billet loader 18. It is performed by the drive device built in the.

As described above, the elevating frame 48 is incorporated in the carriage main body 46, which is shown in FIG.
As shown in (1) and FIG. 4 (2), a pair of U-shaped mandrel support frames 60 are provided and are integrally connected by a bottom plate 62. The provided guide groove is fitted in a linear guide 64 provided on the inner wall surface of the main body side edge frame 50 so as to be vertically movable. In order to drive the elevating frame 48 up and down, a reversely threaded drive screw 66 and a pair of nut members 68 are provided on the lower surface of the carriage body 46, and the mandrel support frame 60 is linked to each of the nut members 68. They are connected by 70. Therefore, by rotating the driving screw 66, the pair of nut members 68 move away from each other or move toward each other, and the mandrel support frame 60 linked to each other is linked.
Is driven up and down with respect to the carriage main body 46. In order to rotate the drive screw 66, the lifting handle 72 is attached to the side edge frame 50 of the carriage main body 46,
A chain 78 is wound around a sprocket 74 at the end of the lifting handle 72 and a sprocket 76 attached to one end of the screw 66, and the lifting amount of the lifting frame 48 is adjusted by adjusting the handle.

A mandrel receiving roller 80 is attached to the mandrel supporting frame 60.

Of the replacement work by the mandrel replacement device thus constructed, the removal work of the mandrel 14 is carried out as follows. First, the elevating platform 26 on which the exchanging cart 30 is mounted is raised, and then the exchanging cart 30 is driven to travel by the drive device provided in the elevating platform 26 and transferred to the billet loader 18. After the transfer, the drive device of the elevating stand 26 and the exchange cart 30 are disconnected and disconnected. Exchange cart 3
The billet loader 18 on which 0 is mounted is moved laterally along the common rail 16 and stopped at the extrusion press center position. Then, the elevating handle 72 of the exchange cart 30 is operated to perform centering with the extruding stem 12, and the extruding stem 1
Unscrew the mandrel 14 from 2 and pull it out, and place it on the exchange cart 30. At this time, if necessary, the traveling handle 5
8 is operated to adjust the movement of the carriage 30 back and forth. After that,
The billet loader 18 is moved to the side of the extrusion press to return to the original position, that is, the standby position, and the exchange cart 30 is moved to the elevating stand 26 while the mandrel 14 is mounted. This movement may be performed by first moving the exchange cart 30 to the elevating / lowering platform 26 side with the traveling handle 58, connecting the drive cart 30 with the connecting member 44, and then driving the motor 38 to drive it. After the exchange carriage 30 is transferred to the side of the elevating stand 26, the mandrel 14 is caused to escape by a hoist (not shown), and then the elevating stand 26 is lowered to return to the initial state.

Next, the work of attaching the mandrel 14 to the extrusion stem 12 is as follows. This is performed in almost the same manner as the above operation, but first, the elevating platform 26 is raised,
The new mandrel 14 is placed on the exchange carriage 30 with a hoist. After that, the exchanging cart 30 is moved forward by the drive device of the elevating stand 26 and moved onto the billet loader 18. When the transfer is completed, the connecting member 44 is separated, the billet loader 18 is moved along the common rail 16,
Match with Press Center C. The mandrel 14 is rotated by using a tool so as to be attached and fixed to the extrusion stem 12, and the extrusion stem 12 is retracted. The billet loader 18 on which the empty exchanging cart 30 is mounted is moved laterally to return to the standby position, the exchanging cart 30 is moved to the elevating / lowering platform 26 side, is connected to the drive device by the connecting member 44, and is replaced by driving the motor 38. The carriage 30 is driven to travel and returned to the lifting platform 26. After that, the elevating platform 26 is lowered to return to the initial state.

According to such a mandrel exchanging device,
Since the mandrel 14 is configured to be delivered to the billet loader 18, and the mandrel replacement work is performed using the billet loader 18 moved along the common rail 16, the replacement device is operated by an extrusion press. It can be laid out on the board side, and work such as supply of the mandrel 14 becomes very easy. Further, since the mandrel exchanging device is not moved directly to the press center, a special drive device or a mechanism for preventing interference with the billet loader is not required, and therefore the facility load can be extremely small. Furthermore,
When the mandrel 14 is replaced, since the height position is adjusted by the elevating frame 48 linearly guided with respect to the carriage main body 46 and the position is adjusted by the billet loader 18, centering work is extremely easy and It is simple and the workability is greatly improved.

[0019]

As described above, according to the mandrel exchanging device for an extrusion press according to the present invention, the elevating platform is arranged in tandem with the standby position of the billet loader that can be moved in and out of the extrusion line of the extrusion press. A mandrel exchanging carriage equipped with a mandrel is attached to this elevating mount, and an elevating frame on which the mandrel is directly mounted is attached to this mandrel exchanging carriage, and the exchanging carriage can be transferred to the billet loader. Since the mandrel can be exchanged by traversing movement by the billet loader, the mandrel exchange workability can be improved while maintaining a compact layout, and the mandrel and the press center can be easily centered. The effect that the exchange time can be greatly shortened is obtained.

[Brief description of drawings]

FIG. 1 is a side view and a front view showing a schematic configuration of a mandrel exchanging device according to an embodiment.

FIG. 2 is a plan layout layout diagram of the device.

3A and 3B are a plan view and a vertical sectional view of a mandrel exchanging carriage.

FIG. 4 is a side view and a cross-sectional view of a mandrel exchanging carriage.

[Explanation of symbols]

10 Container 12 Extrusion Stem 14 Mandrel 16 Common Rail 18 Billet Loader 20 Die Extractor (Dummy Block Exchanger) 22 Mandrel Exchanger 24 Fixed Mount 26 Elevating Mount 30 Mandrel Exchange Cart 32 Cylinder Mechanism 34 Guide Rod 36 Screw Rod 38 Motor 40 Chain 42 moving nut 44 detachable connecting member 46 bogie main body 48 lifting frame 50 main body side edge frame 52 wheels 54 rail plate 56 chain 58 running handle 60 mandrel support frame 62 bottom plate 64 linear guide 66 drive screw 68 nut member 70 link 72 lifting handle 74, 76 Sprocket 78 Chain 80 Mandrel receiving roller

Claims (1)

[Claims] 1. An elevating platform is arranged in tandem at a standby position of a billet loader that can move in and out of an extrusion line of an extrusion press, and the elevating platform is equipped with a mandrel exchanging carriage for mounting a mandrel, and the mandrel exchanging is performed. An elevating frame on which a mandrel is directly placed is attached to the trolley, the exchange trolley can be transferred to the billet loader, and the mandrel can be exchanged by traversing movement by the billet loader. Extruding press mandrel changing device.