JPS644843B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamping device for a vertical roll chock of a universal rolling mill.

Figure 1 shows horizontal roll 1 of a universal rolling mill.
The H-section steel is being rolled by the vertical rolls 2 and 2. The vertical roll 2 is rotatably provided in the vertical roll chock 3.
is supported by a clamp member 4 so as to be movable in the left-right direction as viewed in FIG. 1 so that the roll opening degree of the vertical roll 2 can be adjusted according to the height of the H-shaped steel web. The clamp members 4 are provided on both sides of the vertical roll chock 3, respectively.

As shown in FIG. 2, the clamp member 4 can be moved forward and backward relative to the vertical roll chock 3 by the operation of a hydraulic cylinder device 5. As shown in FIG. The vertical roll yoke 3 can be removed by completely retracting the clamp member 4.

Conventionally, in order to facilitate the movement of the vertical roll chock 3 when setting the roll opening, the hydraulic cylinder device 5 is designed so that a slight gap always exists between the side of the vertical roll chock 3 and the clamp member 4. It had been adjusted accordingly. However, the presence of such gaps during rolling causes errors in the dimensions and shape of the rolled product. For example, as shown in FIG. 2, when there is a slight gap between the vertical roll chock 3 and the clamp member 4, the vertical roll chock 3
As shown in the figure, the clamp member 4 is tilted relative to the horizontally arranged clamp member 4. If the H-section steel is rolled in this state, looseness will occur within the gap, which will cause variations in the flange thickness of the finished product. This problem is important in the recent situation where high dimensional accuracy is required even for rolled products.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to fix the vertical roll chock during rolling to eliminate wobbling due to gaps, thereby improving the dimensional accuracy of rolled products.

The present invention will now be described in detail with reference to FIG. 4, which is a plan view of an embodiment of a vertical roll choke clamping device for a universal rolling mill according to the present invention.

The clamp device of the present invention includes a roll chock moving device 6, a brake device 7, and a clamp member 8.
and a clamp actuating device 9. The roll chock moving device 6 has a lowering motor 10, a driving screw 11, a lowering screw 12, and a balance cylinder device 13. Press down motor 10
drive screw 11 rotated by
The pair of screws 12 having axes perpendicular to and not intersecting with the axes of the screws 11 are rotated to move them to the left in FIG. The left end of the reduction screw 12 is the vertical roll chock 3'
Press to move this to the left. When it is desired to move the vertical roll chock 3' to the right, the roll down motor 10 is reversely rotated to move the roll down screw 12 to the right, and the balance cylinder device 13 attached to the vertical roll chock 3' is operated to move the vertical roll chock 3'. ′ to the right. Vertical roll 2
The position of is detected by a pulse generator 14 that detects the rotation of the drive screw 11. The rotation of the lowering motor 10 that operates the brake device 7 is stopped.

The clamp member 8 and the hydraulically operated sill type clamp actuating device 9 are similar to those shown in FIGS. ′
When moving the vertical roll chock 3', in order to movably support the vertical roll chock 3' on both sides of the vertical roll chock 3', there is a gap between the clamp member 8 and the vertical roll chock 3', similar to the state shown in FIG. Leave some space. Clamp actuator 9
is operated by fluid sent from a fluid supply device 15 via a solenoid valve 16. With a slight gap provided between the clamp member 8 and the vertical roll chock 3', the solenoid valve 16 is in the illustrated position.

Note that in the illustrated position of the solenoid valve 16, the hydraulic circuit of the clamp actuating device 9 is closed, but the hydraulic pressure becomes zero due to leakage or the like within the solenoid valve.

When the pulse generator 14 confirms that the roll chock moving device 6 is activated and the vertical roll 2 is at a predetermined position, the brake device 7 is activated and the movement of the vertical roll chock 3' is stopped. At the same time, a signal indicating that the brake device 7 is operating is sent to the control panel 17. In response to this, the control panel 17 sends a signal to the solenoid valve 16 to move the solenoid valve 16 to the left. Then, the clamp actuating device 9 is actuated and the clamp member 8 is actuated.
firmly clamps the vertical roll chock 3'. In this state, the gap between the clamp member 8 and the vertical roll chock 3' is completely removed and the vertical roll chock 3' is fixed, so if rolling is performed in this state, there will be no wobbling of the vertical roll chock 3'. Therefore, the dimensional accuracy of rolled products must be exact.

When rolling is finished and the roll opening degree is to be set again, the brake device 7 is released, a signal is sent via the control panel 17 to return the solenoid valve 16 to the position shown in the figure, and the clamp actuating device 9 is activated. By retracting, the clamping member 8 can return to its initial supporting position.

[Brief explanation of drawings]

FIG. 1 is a front view showing a state in which an H-section steel is being rolled by a universal rolling mill. FIG. 2 is an enlarged side view showing the state of engagement between the vertical roll chock and the clamp member. FIG. 3 is a diagram showing a state in which the vertical roll chock is tilted due to the gap between the vertical roll chock and the clamp member. FIG. 4 is a plan view showing an embodiment of a vertical roll choke clamp device for a universal rolling mill according to the present invention. 3'... Vertical roll choke, 6... Roll choke moving device, 7... Brake device, 8... Clamp member.

Claims (1)

[Claims] 1. A clamping device for a vertical roll chock of a universal rolling mill, which includes a roll chock moving device that moves the vertical roll chock in the direction of increasing or decreasing the roll opening, and a brake device that stops the operation of the roll chock moving device. a clamp member that supports the vertical roll chock in a movable state on both sides of the vertical roll chock; and a clamp actuator operable to cause the clamp member to clamp and fix the vertical roll chock. and a control device for operating the clamp actuating device in response to the actuation of the brake device.