JPS6340243Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a width rolling device capable of reducing fish tails generated at the front and rear ends of a slab.

Conventionally, when width rolling a slab, the slab S shown in FIG. 1 is passed between the left and right vertical rolls of a vertical rolling mill whose gap is adjusted to a predetermined gap.

However, when the slab S is width-rolled, fishtails a are produced at the front and rear ends of the slab S, as shown in FIG. This fishtail a has a negative effect on the product yield, and increases as the number of width rolling operations and width reduction amount increase.

Therefore, in order to prevent the occurrence of fishtails, it is considered that the leading and trailing corners of the slab S are preformed and pressed to form concave portions b having parallel portions, as shown in Fig. 2A, and then width rolled. It is being When the width of the slab S is rolled by such a method, as shown in FIG. However, in this case, a special preforming press device is required, resulting in problems such as an increase in the length of the rolling equipment line and a rise in equipment costs. For this purpose, a mold with a flat pressing surface is rotatably provided on the outer periphery of the vertical roll, and during preform pressing, the mold is rotated and the leading and rear corners of the slab are formed using the mold. However, in this case, the accuracy of stopping the mold becomes a problem.

In view of the above-mentioned viewpoints, the present invention provides a width rolling device that can preform press the leading and rear end corners of slabs without requiring a special preforming press device and without causing problems with stopping accuracy. This was done for the purpose of

According to the present invention, a mold for preforming press is disposed on the vertical roll for width reduction so that it can be raised and lowered, and if necessary, the mold can be applied to the vertical roll surface and preforming press can be performed by a hydraulic reduction device. That's what I do.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

A vertical roll shaft box 1 is installed in the housing of the width rolling device.
1' is disposed so as to be movable in the axial direction of the slab 2, and a drivable vertical roll 3 is fitted into the vertical roll shaft boxes 1 and 1', and a vertical fluid pressure cylinder is installed in the vertical roll shaft box 1. 4, and a lifting bracket 5 is fixed to the upper end of the rod of the hydraulic cylinder 4,
A mold 7 for a preforming press, which can be moved up and down along a hollow part 6 provided in the vertical roll shaft box 1, is attached to the lifting bracket 5 via a rod 8. As shown in FIG. 6, the planar shape of the mold 7 has a flat surface on the side facing the slab 2, the front and rear ends of the flat surface are chamfered, and the side facing the vertical roll 3 has a vertical roll. It has an arcuate shape so that it can come into contact with the outer periphery of 3. In the figure, numerals 9 and 9' indicate fluid pressure cylinders for width rolling.

During width rolling, the mold 7 is moved by the fluid pressure cylinder 3.
is lowered and positioned on the outer periphery of the vertical roll 3, and the vertical roll shaft boxes 4,
The mold 7 is moved toward the center of the rolling line via the roller 4', and the front and rear corners of the slab 2, which is waiting in the line, are preformed as shown in FIG. The rolling reaction force acting on the mold 7 during preform pressing is supported by the housing via the vertical rolls 3 and the like.

After the preform pressing, the mold 7 is raised to its original position by the hydraulic cylinder 4, the gaps of the vertical rolls 3 are set at a predetermined interval, and the slab 2 is rolled in width.

In addition, in the embodiment of the present invention, the case where a fluid pressure cylinder is used as the device for raising and lowering the mold is explained, but it is possible to employ various means such as a rack and pinion, and other points of the present invention are explained. that various changes may be made without departing from the scope;
Of course, etc.

According to the width rolling equipment of the present invention, preforming press is performed using a mold that can be raised and lowered, so no fish tails occur in the slab after width rolling, improving the yield of finished products, and the special preforming press equipment Since there is no need to install a mold, equipment costs are reduced, and since the mold can be moved up and down and does not rotate horizontally, there is no need to worry about stopping accuracy, making operation easier, etc. Various types of excellent effects can be achieved.

[Brief explanation of the drawing]

Figure 1 (A) and (B) are explanatory diagrams of dead tails that occur when a slab is width-rolled without preform pressing. Figure 2 (A) and (B) are illustrations of a special preform press device installed in the rolling line, and the pressed surface Figures 3 to 6 show an embodiment of the present invention; Fig. 4 is an explanatory drawing when performing width rolling, Fig. 5 is a perspective view of the mold attachment part of the device of the present invention, and Fig. 6 is a preforming press using the device of the present invention. FIG. In the figure, 1 and 1' are vertical roll shaft boxes, 2 is a slab, and 3
is a vertical roll, 4 is a fluid pressure cylinder, 7 is a mold,
9 and 9' indicate fluid pressure cylinders.

Claims (1)

[Scope of utility model registration request] A width rolling device characterized in that a mold for preforming press is arranged in an axle box that supports vertical rolls so as to be able to move up and down.