JPH05241Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a conveying device in a forging machine for forging heavy materials.

[Conventional technology and its problems]

Conventionally, forging machines that forge slabs forged from continuous forging equipment have been cut into appropriate lengths, and before being applied to a rolling machine, the forging machines are temporarily stopped, and both end faces in the width direction are placed opposite each other. Forged in a mold,
The width of the slab is reduced, and the slab is conveyed by pinch rolls driven by an electric motor (see, for example, Japanese Patent Laid-Open Publication No. 101201/1983).

However, although the electric motor that drives this pinch roll is synchronized with the movement of the press die, since the weight of the slab is extremely large (for example, about 30 tons), the inertia force is also large, causing intermittent movement of the slab. The accuracy of stop positioning during feeding becomes a problem, and in order to shorten the slab start/stop time and ensure accuracy, large-capacity electric motors and control devices are required, increasing the cost of the entire conveying device. It was hot.

[Means for solving problems]

Therefore, the present invention was devised in order to solve such problems, especially to provide an inexpensive conveyance device, and its gist is as follows: 1)
In a forging machine that forges a heavy material 1, which is held and conveyed by a pair of pinch rolls 11 and 11, using a reciprocating press die 3, the die 3 of a hydraulic cylinder 8 connected to the press die 3 is used. A conveying device for a forging machine in which a hydraulic chamber 8a pressurized during retreat and a hydraulic motor 10 are connected via a switching valve 9, and the pinch roll 11 is driven by the hydraulic motor 10, 2) The switching valve 9 provided between the hydraulic cylinder 8 and the hydraulic motor 10 is a directional switching valve, and the hydraulic motor 10 can be switched between forward and reverse directions by switching the switching valve 9. It is in the conveyance device in the forging machine described in item 1).

〔Example〕

Hereinafter, the structure of the present invention will be explained in detail with reference to embodiments shown in the accompanying drawings.

1 is a slab forged by continuous forging equipment (not shown), for example, 300 mm thick, 10 m long,
It is a heavy object with a width of 1600 mm and a weight of approximately 30 tons.
It is transported in the direction of the arrow. 3, 3 are press dies in a forging machine that forges both end faces in the width direction of this slab 1, and these dies 3, 3 are operated by hydraulic pressure.
b Approaching and moving away from each other in the direction of the arrow. That is, the molds 3, 3 reciprocate to reduce the width of the slab 1. This press die 3 is integrated with a press slide 4. With this press slide 4,
An interlocking device for driving the pinch roll 11 described later is provided. This interlocking device is constructed as follows.

That is, a pair of links 5, 5 is provided protruding from either one of these press slides 4, 4, and this link 5 is connected to the piston rod 7' of the hydraulic cylinder 8.
It is connected with.

Since it is constructed symmetrically with respect to the slab 1, only one will be explained below. The piston 7 fitted into the hydraulic cylinder 8 pressurizes the hydraulic oil in the hydraulic chamber 8a. The pressurized hydraulic oil is supplied to the hydraulic motor 10 via an electromagnetic directional switching valve 9 provided in the connecting pipe 6 or an open/close electromagnetic switching valve (not shown), and rotates the hydraulic motor 10. This hydraulic motor 10 drives pinch rolls 11 that are in contact with the upper and lower surfaces of the slab 1. Naturally, a pair of pinch rolls 11 is provided, and these are driven synchronously by the hydraulic motors 10.

Next, the operation of this embodiment will be described. In order to forge both widthwise end faces of the slab 1 and reduce its width, the press slide 4 is reciprocated by hydraulic pressure (not shown). This backward movement operates the piston 7 in the hydraulic cylinder 8, causing the hydraulic chamber 8a to
Pressurize the hydraulic oil inside. This pressurized hydraulic oil is led to the hydraulic motor 10 via the pipe line 6 and the electromagnetic directional control valve 9, drives the hydraulic motor 10, and rotates the pinch roll 11. As a result, slab 1
will move forward. In addition, press mold 3
When moving forward to forge the slab 1, the piston 7 does not pressurize the hydraulic oil in the hydraulic chamber 8a, so the hydraulic motor 10 is not driven, the pinch roll 11 remains stopped, and the slab 1 does not move. .

Further, when the press mold 3 moves forward, if the pressure inside the hydraulic chamber 8a of the hydraulic cylinder 8 becomes negative,
Hydraulic oil is supplied from the oil tank 12. Furthermore, if the direction of the hydraulic oil supplied to the hydraulic motor 10 is reversed by switching the electromagnetic directional switching valve 9, the hydraulic motor 10 is reversed, the pinch roll 11 is also reversed, and the slab 1 can be moved backward. You can also do it.

Therefore, in this case, since the pinch rolls 11 can be rotated in forward and reverse directions, in order to improve the yield when forging both end faces in the width direction of the carab 1,
It is also possible to first slightly forge both end faces in the width direction at the front and rear ends of the slab 1, and then forge the remaining entire area sequentially from the front or back end.

Although the present embodiment has been described using a long slab as the material to be forged, the present invention is not limited to this, and a short material may be used. Furthermore, although the description has been made using a forging machine equipped with a pair of press dies, the present invention is not limited to this. The invention can be applied to any device that drives pinch rolls.

[Effect of idea]

According to the present invention, the pinch roll is intermittently driven by the hydraulic motor driven by the hydraulic pressure obtained by the movement of the press die, so that the forging and the loading and unloading of the material to the forging machine are performed. The unloading and unloading are completely synchronized, and even if the material has a large inertial force, the material can be positioned accurately, and the operating rate of the forging machine can be improved.

Since the pinch roll is driven by the power obtained from the movement of the press die using a hydraulic circuit equipped with a hydraulic cylinder and a hydraulic motor, an independent power source for driving the pinch roll is not required, and the equipment is The entire structure can be made extremely compact and inexpensive. In particular, since it uses a hydraulic motor, compared to conventional electric motors,
Since it can be started, stopped, and reversed, the degree of freedom in transporting materials is increased, and the operating rate of the forging machine can be improved.

[Brief explanation of the drawing]

The accompanying drawings are schematic illustrations of embodiments of the invention. 1...Slab, 3...Press mold, 8...Hydraulic cylinder, 9...Solenoid directional control valve, 10...Hydraulic motor, 11...Pinch roll.

Claims (1)

[Claims for Utility Model Registration] (1) A pair of pinch rolls 11, 11
In a forging machine that forges a heavy material 1 to be transported using a reciprocating press die 3, a hydraulic chamber of a hydraulic cylinder 8 connected to the press die 3 is pressurized when the die 3 retreats. 8
a and a hydraulic motor 10 are connected via a switching valve 9, and the pinch roll 11 is driven by the hydraulic motor 10. (2) Scope of claim for registration of a utility model in which the switching valve 9 provided between the hydraulic cylinder 8 and the hydraulic motor 10 is a directional switching valve, and by switching the switching valve 9, the hydraulic motor 10 can be switched between forward and reverse directions. A conveying device in the forging machine described in paragraph (1).