JP2650006B2 - Extrusion press mandrel changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A mandrel of an extrusion press is appropriately replaced by changing an extruded product or the like, and a mandrel replacing device is used for this replacement. The conventional mandrel changing device is disposed on the side opposite to the operation side of the extrusion press, that is, on the side of the press opposite to the place where the press operation control panel is installed, and has at least one pair of Xs for supporting the mandrel.
It is configured with a trolley equipped with a letter-shaped opening / closing link. The opening / closing link is capable of opening and closing the upper leg portion so as to be adaptable to the diameter of the mandrel, and a rotating roller is attached to the tip of the leg portion in contact with the mandrel so as to make rotational contact. In addition, the carriage can be moved up and down, and the centering to the press center is adjusted by an elevating device. Further, the bogie can be traversed in a direction orthogonal to the press center, and can be run by using a common rail commonly used with a billet loader and the like.

[0003]

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

Further, in the conventional mandrel changing device, the mandrel is supported by an X-shaped opening / closing link provided with a rotating roller at the tip, and the mandrel is replaced by the surface roughness of the rotating roller and the presence of attached matter. Also, there was a problem that the centering was not performed well.

The present invention focuses on the above-mentioned conventional problems, and can improve the mandrel replacement workability while having a compact layout, and can easily center the mandrel and the press center. It is an object to provide a mandrel changing device.

[0006]

In order to achieve the above-mentioned object, a mandrel changing apparatus according to the present invention is provided with a vertically movable pedestal which is tandemly arranged at a standby position of a billet loader which can traverse and enter an extrusion line of an extrusion press. The lifting platform is equipped with a mandrel exchange trolley equipped with a mandrel, and this mandrel exchange trolley is equipped with an elevating frame on which the mandrel is directly mounted, so that the exchange trolley can be moved to the billet loader. The mandrel can be replaced by traversing the billet loader.

[0007]

According to the above construction, the mandrel is moved to the press center for replacement work using the billet loader. Therefore, there is no need to provide a special positioning stopper or the like, and the layout is arranged on the operation side of the extrusion press. Thus, the mandrel replacement workability can be improved. In addition, the exchange trolley equipped with the mandrel moves between the elevating platform and the billet loader, and the trolley is provided with a mandrel lifting frame so that it can be raised and lowered on the trolley. As a result, the mandrel center does not swing left and right when ascending and descending, so that the centering work with the extrusion press center can be performed reliably and easily.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of a mandrel changing apparatus according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic side view and a front view showing the entire configuration of the relational configuration between the mandrel changing device and the 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 opposite thereto, and a mandrel 14 to be replaced is provided 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 so as to be charged with the billet so as to be orthogonal to the press center C. A billet loader 18 is arranged on the installation side, and billets are loaded by traversing to a press center. A die take-out device (dummy block exchanging device) 20 is provided at the other end of the common rail 18, and is similarly configured to traverse between the common rail 16 and a press center.

In such a press configuration, the billet loader 1 is located at the standby position of the billet loader 18.
8, a mandrel changing device 22 is installed in tandem. As shown in FIG. 1, the mandrel changing device 22 includes an elevating pedestal 26 that is driven up and down with respect to a fixed gantry 24, and the mandrel 14 to be replaced is directly mounted on the elevating pedestal 26. It is equipped with a mandrel exchange trolley 30 to be replaced.

First, the elevating platform 26 is formed in a U-shaped cross section, and is connected to an elevating cylinder mechanism 32 attached to the lower stationary platform 24 so as to be capable of ascending and descending. Further, a plurality of guide rods 34 are attached to the bottom surface of the elevating gantry 26 and penetrate the fixed gantry 24 to guide up and down. Therefore, the lifting pedestal 26 is driven up and down by the driving of the cylinder mechanism 32, and the mandrel 14 mounted on the exchange trolley 30 mounted thereon can be set at the height of the press center. In addition, the siury rod 3
6 is pivotally supported, and one end thereof is connected to a motor 38 attached to the lower surface of the end of the elevating platform 26 via a chain 40 so as to be able to transmit rotation. And screw rod 36
A moving nut 42 is screwed into the nut and can be reciprocated back and forth by rotation of the screw rod 36. A detachable connecting member 44 for attaching and detaching the mandrel exchange trolley 30 mounted on the elevating gantry 26 is attached to the moving nut 42, so that the trolley 30 travels on the elevating gantry 26 by driving of the motor 38. .

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

The bogie main body 46 can be run with a plurality of wheels 52 provided on the lower surface of both side edge frames 50, and a rail plate 54 (FIG. 4) provided on the upper surface of the side wall of the elevating platform 26 and the upper side edge of the billet loader 18. (See (2))
It is possible to travel between the lifting stand 26 and the billet loader 18. The wheels 52 arranged on one side are used as drive wheels, which are wound around a chain 56 around a sprocket 54 attached to an axle, and one of the sprockets 56
The rotation operation of the traveling handle 58 attached to the side edge frame 50 of the bogie main body 46 is transmitted thereto. A side guide roller 59 is attached to the wheel 52 so as to be in contact with the outer surface of the rail plate 54 to prevent the bogie main body 46 from swaying. For this reason, the bogie main body 46 can be made to move by operating the traveling handle 58. This is used for adjustment movement, and the bogie main body 46 is used for movement between the elevating platform 26 and the billet loader 18. This is performed by a driving device built in the device.

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

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

Of the replacement work by the mandrel replacement device thus configured, the removal work of the mandrel 14 is performed as follows. First, after raising and lowering the gantry 26 on which the exchange trolley 30 is mounted, the exchange trolley 30 is driven to travel by a drive device provided on the elevation gantry 26 and transferred to the billet loader 18. After the transfer, the drive unit of the elevating gantry 26 and the exchange trolley 30 are disconnected and disconnected. Exchange cart 3
The billet loader 18 on which the “0” is mounted is traversed along the common rail 16 and stopped at the extrusion press center position. The extruding stem 12 is centered by operating the elevating handle 72 of the exchange trolley 30, and the extruding stem 1
The mandrel 14 is unscrewed from 2, pulled out, and placed on the exchange trolley 30. At this time, the traveling handle 5
8 to move the carriage 30 back and forth. After a while
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 trolley 30 is moved to the lifting platform 26 with the mandrel 14 mounted. This movement may be performed by first moving the exchange carriage 30 to the elevating pedestal 26 side by the traveling handle 58, connecting the exchange carriage 30 to the driving device by the connecting member 44, and then driving the motor 38 to drive. After the exchange trolley 30 is transferred to the lifting platform 26 side, the mandrel 14 is carried away by a hoist (not shown), and then the lifting platform 26 is lowered to return to the initial state.

Next, the operation of attaching the mandrel 14 to the extrusion stem 12 is as follows. This is performed in substantially the same manner as the above operation, but first, the lifting pedestal 26 is raised,
The new mandrel 14 is placed on the exchange trolley 30 by the hoist. Thereafter, the exchange trolley 30 is moved forward by the driving device of the elevating gantry 26 and moved onto the billet loader 18. When the transfer is completed, the connecting member 44 is separated, and the billet loader 18 is moved along the common rail 16,
Align with Press Center C. The mandrel 14 is rotated and fixed to the extrusion stem 12 using a tool, and the extrusion stem 12 is retracted. The billet loader 18 on which the empty exchange cart 30 is placed is moved sideways to return to the standby position, the exchange cart 30 is moved to the lifting platform 26 side, connected to the driving device by the connecting member 44, and then exchanged by driving the motor 38. The carriage 30 is driven and returned to the lifting platform 26. Thereafter, the elevating gantry 26 is lowered to return to the initial state.

According to such a mandrel exchange device,
Since the mandrel 14 is configured to be transferred to the billet loader 18 and the mandrel exchange operation is performed using the billet loader 18 moved along the common rail 16, the exchange device is operated by an extrusion press. The layout can be performed on the board side, and work such as supply of the mandrel 14 becomes very easy. In addition, since the mandrel changing device is not directly moved to the press center, no special driving device or a mechanism for preventing interference with the billet loader is required, so that the facility load can be extremely reduced. Furthermore,
When the mandrel 14 is replaced, the centering operation is performed by adjusting the height position by the lifting frame 48 linearly guided with respect to the bogie body 46 and by adjusting the position by the billet loader 18. Therefore, the centering operation is extremely easy and It is easily performed and the workability is greatly improved.

[0019]

As described above, according to the mandrel changing apparatus of the extrusion press according to the present invention, the elevating racks are arranged in tandem at the stand-by position of the billet loader capable of entering and exiting the extrusion line of the extrusion press. Attaching a mandrel exchange trolley equipped with a mandrel to this lifting gantry, attaching a lifting frame on which a mandrel is directly mounted to the mandrel exchange trolley, enabling the exchange trolley to travel and transfer to the billet loader, Since the mandrel can be replaced by traversing movement by the billet loader, the mandrel replacement workability can be improved while having a compact layout, and the mandrel and the press center can be easily centered, The effect is obtained that the replacement time can be greatly reduced.

[Brief description of the drawings]

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

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

FIG. 3 is a plan view and a longitudinal sectional view of the mandrel changing cart.

FIG. 4 is a side view and a cross-sectional view of the mandrel changing cart.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Container 12 Extrusion stem 14 Mandrel 16 Common rail 18 Billet loader 20 Die take-out device (dummy block exchange device) 22 Mandrel exchange device 24 Fixed gantry 26 Elevating gantry 30 Mandrel exchange trolley 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 Elevating frame 50 Main body side frame 52 Wheel 54 Rail plate 56 Chain 58 Travel handle 60 Mandrel support frame 62 Bottom plate 64 Linear guide 66 Drive screw 68 Nut member 70 Link 72 Elevating handle 74 76 Sprocket 78 Chain 80 Mandrel receiving roller

Claims (1)

(57) [Claims] 1. An elevating rack is arranged in a standby position of a billet loader capable of traversing and entering an extrusion line of an extrusion press. The elevating rack is equipped with a mandrel changing vehicle having a mandrel mounted thereon. The truck is provided with an elevating frame on which a mandrel is directly mounted, so that the exchange bogie can be moved to the billet loader and the mandrel can be replaced by traversing the billet loader. Mandrel changing device for extrusion press.