JPS617005A - rolling mill - Google Patents

Abstract

PURPOSE:To improve the function to control the crown at the transverse ends of a sheet by providing a piston which slides on a roll shaft part and fits into the tapered hollow part at the roll end face and a cylinder which fits to the roll shaft and is supported by a roll bearing to the roll. CONSTITUTION:The hollow part 2 made into a taper ring shape is concentrically drilled to the body end of the work roll 1 and the cylindrical piston 3 is slidably fitted to the shaft part 5. An annular taper wedge 4 is fitted into the hollow part 2. One end of the cylinder 9 fitted to the shaft part 5 is further pressed to and supported by the bearing 6 of a journal box 7 and a spring 10 is interposed between said cylinder and the piston 3. A pressure oil is supplied through oil conduit holes 11, 12 into the hollow parts 2, 8 to draw or push the taper wedge 4 of the piston 3 from or into the part 2. The satisfactory control of the shape at the transverse ends of a rolling sheet is thus made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a rolling mill with an improved crown control function at the width end portion of a rolled material.

[Prior Art] When rolling is performed using a normal rolling mill, edge drops occur at the width ends of the rolled material, making it impossible to improve the cross-sectional shape. For this reason, various methods have been proposed to eliminate edge drops and improve product quality.
As shown in the figure, a J-purling-shaped hollow part is provided on the end face of the work roll a, and the roll end face side is wide and the inside part is narrow. There is a rolling mill that controls the shape of the outer periphery of the end of the work roll a and controls the crown shape of the width end of the rolled material S. However, in such a rolling mill, it is difficult to change the cross-sectional shape of the rolled material. At that time, the work roll a must be taken out of the rolling mill and the position of the Dever wedge C must be adjusted, making the work complicated and making it difficult to control the shape.
There were problems such as not being able to fully utilize M(m).

[Problems to be Solved by the Invention] An object of the present invention is to provide a rolling mill that can easily and better control the crown shape of the width end portion of a rolled material.

[Means for Solving the Problems] The present invention provides a cylinder having a tapered hollow portion narrow on the inside in the axial direction on the end face of the roll, and one end of which is supported by a bearing that supports the roll. A screw that is fitted into the cylinder, and a taper wedge fitted into the hollow part is fixed to the cylinder!・It is fitted in such a way that it can move in the axial direction.

[Function] In the present invention, when pressure oil is supplied to the hollow part or cylinder at the end of the roll, the tapered wedge moves in the roll axis direction, and the position of the tapered wedge relative to the hollow part at the end of the roll is adjusted.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which a tapered ring-shaped hollow part 2 is bored concentrically with the roll axis and has a narrow inner side in the roll axis direction on the end face of the body end of the work roll 1. A hollow cylindrical screw 1-3 is fitted into the portion 5 so as to be able to slide in the axial direction, and a ring-shaped taper wedge 4 is fixed to the end of the hollow portion 2 of the piston 3 to secure the taper wedge 4. The shaft portion 5 of the work roll 1 is supported by the work roll shaft box 7 via the bearing 6, and the shaft portion 5 of the work roll 1 is fitted into the hollow portion 2. A cylinder 9 is fitted with a portion that fits into the shaft portion 5 of the work roll 1, and a portion that has a predetermined hollow portion 8 with respect to the shaft portion 5 of the work roll 1. The end of the piston 3 on the bearing 6 side is fitted into the hollow part 8 of the cylinder 9, and the spring 10 is housed in the hollow part 8 so as to bias the piston 3 toward the hollow part 2. Oil guide holes 11 and 12 are bored in the shaft portion of 1 to communicate the oil guide hole 11 with the hollow part 2 and the oil guide hole 12 with the hollow part 8, respectively.
Or supply pressure oil to 8 to cool it down. 13.14 in the figure
．． 15 is a seal.

When the above-mentioned work roll 1 is used as a work roll of a normal 4-high rolling mill for rolling, if the edge drop of the rolled material S is large, pressurized oil is supplied from the oil guide hole 11 to the body end side of the work roll 1. It is supplied to the hollow part 2. Therefore, the taper wedge 4 moves in the direction of being pushed out from the hollow portion 2, and the piston 3 is pushed into the hollow portion θ by the force of the spring 10. When the tapered wedge 4 moves in the direction of being extruded from the hollow portion 2, the outer circumference of the body end of the work roll 1 is reduced, and the edge drop of the rolled material S is reduced. When the tapered wedge 4 is pulled out from the hollow part 2 by a predetermined amount, the outer circumference of the end portion of the work roll 1 tends to change. Therefore, for example, by using the roll bending device 16 shown in FIG. Lees bending can be easily applied, and the effect of reducing edge drops is significant.

In addition, if edge drop does not occur at the width end of the rolled material, but rather the thickness of the rolled material becomes thicker at the width end, the oil guide hole 12
Pressure oil is supplied to the hollow part 8 of the cylinder 9, and the taper wedge 4 is pushed into the hollow part 2 by a predetermined amount via the piston 3. As a result, the outer periphery of the end of the body of the work roll 1 is pushed outward due to the wedge effect. It becomes difficult to expand and deform, and the thickness of the width end of the rolled material decreases.

In addition, in the examples of the present invention, the case where the roll is used as a work roll has been described, but it is also possible to use it as an intermediate roll or other rolling roll.
It is also possible to apply this method to a rolling mill in which work rolls and intermediate rolls can be shifted in the axial direction, and the tapered wedge can be installed on both sides of the roll body end or on one side. It is also possible to provide a taper tapered toward the end surface of the roll on the outer periphery of the end of the roll body on the side where the tapered wedge is provided, and various other changes may be made without departing from the gist of the present invention. Of course.

[Effects of the Invention] According to the present invention, the shape of the width end of the rolled material can be controlled better than before, so a product of good quality can be obtained, and the position of the Taber wedge can be easily changed. As a result, various excellent effects such as improved work efficiency can be achieved.

[Brief explanation of drawings]

FIG. 1 shows the rolling l! of the present invention! FIG. 2 is an overall view of an embodiment of the rolling mill of the present invention, and FIG. 3 is a detailed view of the [J layer section of a conventional rolling mill. In the figure, 1 is a work roll, 2 is a hollow part, 3 is a piston, 4 is an arbor wedge, 8 is a hollow part, 9 is a cylinder, 10
11.12 indicates a spring, and 11.12 indicates an oil guide hole. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] 1) A tapered hollow part that is narrow on the inside in the axial direction is provided on the end face of the roll, a cylinder whose one end is supported by a bearing that supports the roll is fitted onto the shaft part of the roll, and the hollow part is fitted into the cylinder. A rolling mill characterized in that a piston to which a taper wedge is fitted is fitted so as to be able to move in the axial direction.