JPS6018482B2 - universal rolling stand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to universal rolling stands, and more particularly to structures for securing vertical rolls.

Conventionally, in a universal rolling stand, the chocks of a pair of vertical rolls are supported by being slidably mounted on the upper surface of a support portion protruding from a housing via a liner. Above this vertical roll chock, there is a guide piece for guiding the chock when the vertical roll chock is moved in the horizontal roll direction perpendicular to the vertical roll axis to adjust the roll. They are provided with a gap between them. Therefore, when an unbalanced load is applied to the vertical roll during rolling operation, the vertical roll chock is displaced up and down by the gap, making it impossible to maintain the normal set position of the vertical roll. The present invention solves the above-mentioned technical problems and provides a universal rolling stand that firmly fixes the vertical rolls during rolling operation and allows the vertical rolls to move in the rolling direction when adjusting the rolling reduction. The purpose is to provide.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a partially cutaway front view of an embodiment of the present invention;
FIG. 2 is a sectional view taken from the cutting plane line Rollo in FIG. 1. This universal rolling stand consists of a pair of upper and lower horizontal rolls 1 and 2 and a pair of left and right vertical rolls 3 and 4 in a vertical plane.
are supported by the housing 5. Horizontal roll 1, 2
has a horizontal rotation axis and horizontal roll chocks 6, 7
The vertical rolls 3 and 4 have vertical rotational axes and are supported by vertical roll chocks 8 and 9. The rolled material advances in the direction of arrow 10 (rightward in FIG. 1, direction perpendicular to the plane of the paper in FIG. 2), and is pressed by each roll 1 to 4 to form, for example, an H-shaped steel shown in FIG. 1 1 is rolled and formed. During the rolling operation, the reaction force that the horizontal rolls 1 and 2 receive is caused by the horizontal roll chocks 6 and 7 and the rolling device 12.
, 13 to the housing 5. In addition, the reaction force that the vertical rolls 3 and 4 receive is the vertical roll chock 8 and 9
and is transmitted to the yokes 16 and 17 via the lowering devices 14 and 15. The lower portions of both ends of the vertical roll chock 9 along the rolling material progressing direction, that is, the horizontal rolling direction perpendicular to the blank 101, are supported by being placed on the upper surface of the support portion 18 protruding inwardly from the housing 5.

A liner 19 is interposed between the housing 5 and the vertical roll chock 9. The housing 5 is provided with a cylinder 20 having an axis parallel to the arrow 10. When the sill 20 is driven to extend, the guide piece 22 provided at the tip of the piston rod faces the upper surface 23 of both ends of the vertical roll chock 9 with a gap necessary for back movement.
When adjusting the rolling down of the vertical rolls 3 and 4, the vertical roll chock 9 is guided by this guide piece 22 and is slid in the horizontal rolling direction. The other vertical roll chock 8 is
It is supported similarly to the vertical roll chock 9. A vertically extending double-acting sill 24 serving as a pressing means is housed in the lower part of the upper horizontal roll chock 6 with the piston rod 25 facing downward.

This double acting cylinder 24 is arranged directly above the upper surface 23 of the vertical roll chocks 8,9. During Shoshita operation,
When fixing the vertical roll chocks 8, 9, the double acting cylinder 24 is driven to extend.

Then, the tip of the piston rod 25 protrudes downward from the lower end surface of the horizontal roll chock 6 and comes into contact with the upper surface 23 of the vertical roll chocks 8, 9.
Press 9 downward. Therefore, vertical roll chock 8,
9 is pressed and held between the piston shank 25 and the support portion 18, and the vertical roll chocks 8, 9 are firmly fixed.
Therefore, even if an unbalanced load is applied to the vertical rolls 3, 4, the vertical roll chocks 8, 9 will not be displaced up or down. When adjusting the reduction of the vertical rolls 3 and 4, the double-acting cylinder 24 is driven to reduce.

Then, the tip of the piston 25 separates from the upper surface 23 of the vertical roll chocks 8 and 9, and the vertical roll chock 8
, 9 are released. Therefore, the reduction adjustment is performed by moving the vertical roll chocks 8, 9 in the horizontal direction while sliding them on the sliding surfaces of the guide piece 22 and the support portion 18. In another embodiment of the present invention, instead of the pumping cylinder 24, a pressing means having a spring force is used to hold the vertical roll chock 8.
, 9 may be pressed downward.

Even in this case, the pressing means has a structure that can be contracted upwardly so as to allow horizontal movement of the vertical roll chocks 8 and 9 during the reduction adjustment. As described above, according to the present invention, the lower part of the vertical roll is supported by the support part of the housing, and the pressing means that is vertically extendable and retractable for pressing the vertical roll chock downward is housed in the lower part of the horizontal roll chock. When adjusting the rolling reduction, the pressing means can be reduced to release the pressure on the vertical roll chock and moved horizontally to adjust the roll gap, and during rolling operation, the pressing means can be extended to press the vertical roll chock downward. It can be firmly fixed.

The present universal rolling stand is particularly effective in reversible rolling where the roll gap needs to be changed quickly and frequently.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention, and FIG. 2 is a sectional view taken from the section line D-0 in FIG. 1. 1, 2...Horizontal roll, 3, 4...Vertical roll, 5...
...Housing, 6,7...Horizontal roll chock, 8,9...Vertical roll chock, 18
...Support part, 24...Double acting cylinder. Figure 1 Figure 2

Claims (1)

[Claims] 1. In a universal rolling stand, the lower part of the vertical roll chock is supported by a support provided in the housing, and the upper part of the vertical roll chock can be pressed downward against the lower part of the upper horizontal roll chock, and the pressed state can be released. A universal rolling stand characterized by housing press means that can be expanded and contracted upward and downward.