JPS61259812A - Rolling mill - Google Patents

Abstract

PURPOSE:To replace and shift a rolling roll quickly and to simplify a mill structure by supporting the rolling roll by a couple of wedge members which are set on the inside wall of a housing window and which are movable in the axial direction of the roll. CONSTITUTION:The wedge members 2 and 3 are moved in the direction of arrow (a) by a hydraulic cylinder 10 and the inner wedge members 7 and 8 are moved also in the direction of arrow (a) by a hydraulic cylinder 6. Thus, the roll is shifted in the direction of arrow (a). The wedge members 7 and 8 are movable with the members 2 and 3 so as to move in the direction of arrow (b). In that case, the shifting stroke of the hydraulic cylinder 10 is larger than that of the hydraulic cylinder 6. Thus, shifting, offsetting, and crossing of the rolling roll are performed easily and quickly; equipment costs and running costs are reduced because of the simple mill structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rolling mill in which rolling rolls can be easily and quickly shifted, offset, or crossed, and rolling rolls can be easily replaced. It is.

[Prior Art] In recent years, in order to improve the cross-sectional shape of rolled material without edge drops and improve product quality, rolling mills have been developed in which work rolls are shifted in the axial direction, or work rolls have been shifted in the rolling line direction. A rolling mill has been devised in which the rolls are offset from each other, or a rolling mill in which upper and lower work rolls are not disposed parallel to each other but are crossed in a plan view. In such a rolling mill, if the work rolls can be shifted, offset, and crossed at the same time, the shape control function of the rolling mill will be further improved.

[Problems to be Solved by the Invention] However, for example, in the case of a rolling mill that is capable of shifting and offsetting the work rolls, it is necessary to have a device for shifting the work rolls and a device for offsetting the work rolls, respectively. Since it is necessary to separately install the work rolls and perform the offset and shift of the work rolls separately, the work roll offset and shift work is complicated and time-consuming.Moreover, the shift device and the offset device are each installed in the rolling mill housing. There are problems such as the structure around the rolling mill housing becoming complicated and making it difficult to replace the work rolls. This also applies to rolling mills that are capable of shifting and crossing work rolls.

The present invention has been made in view of the above-mentioned circumstances, with the object of making it possible to easily and quickly shift, offset or cross the mill rolls, and to facilitate the replacement of the mill rolls.

[Means for Solving the Problems] In the present invention, a pair of front and rear wedges whose opposite surfaces are inclined and parallel when viewed in plan are disposed on the inner wall of the rolling mill housing window so as to be movable in the width direction of the rolled material. The invention is characterized in that an inner wedge capable of supporting a rolling roll via an axle box is disposed between opposing surfaces of the wedge so as to be movable in the width direction of the rolled material.

[Function] Therefore, in the present invention, when the wedge and the inner wedge are moved by a predetermined amount in the width direction of the rolled material, the rolling roll is shifted in the axial direction and offset in the direction parallel to the rolling line, or the rolling roll is shifted. At the same time, the upper and lower rolling rolls become crossed.

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

The figure is a plan view of a work roll portion in one embodiment of the present invention.

Wedges 2 and 3 with parallel slopes are arranged on the inner wall of the window of the rolling mill housing 1 so as to be able to slide in the width direction and the vertical direction of the rolled material. A support arm 5 is made to protrude toward the outside of the machine housing 1, and a trunnion-type fluid pressure cylinder 6 whose axis is oriented in the width direction of the rolled material is disposed on the support arm 5. Inner wedges 7 and 8 that can slide along the wedges 2 and 3 in the width direction and vertical direction of the rolled material are disposed between them, and the inner wedges 7 and 8 are fixed by a support arm 9 to prevent the rolling material from rolling. The rod end of the fluid pressure cylinder 6 is connected to the support arm 9, and a trunnion type fluid pressure cylinder 1o is disposed on the support arm 5 in parallel with the fluid pressure cylinder 6, and the rod end of the fluid pressure cylinder 10 is connected to the support arm 9. Connect to Zabi 3. The rod end of the hydraulic cylinder 10 may be pivoted to the support arm 4 or connected to the wedge 2.

A vertical piston 11 for bending and balancing is fitted onto the upper and lower surfaces of the inner wedges 1 and 8 so as to be able to slide vertically, and the flange surface of the work roll shaft box 12 is supported by the piston 11, and the work roll is 12 rotatably supports a work roll 14 via a bearing 13.

In addition, the wedges 2, 3, 7, 8, the fluid pressure cylinder 6
．． The device consisting of 10 units is stacked in four locations horizontally and vertically.

For example, when the work roll 14 is shifted in the A direction in the figure and offset toward the mouth using the above device, the hydraulic cylinder 10 moves the wedges 2 and 3 in the A direction, and the fluid pressure cylinder 6 moves the inner wedges 7 and 8. move it in the direction A. Since the inner wedges 7, 8 move together with the wedges 2, 3, they also move in the A direction and in the mouth direction at the same time, so that the work roll 14 is shifted in the A direction and offset in the mouth direction. In this case, the movement stroke of the fluid pressure cylinder 10 is made larger than the movement stroke of the fluid pressure cylinder 6.

When the work roll 14 is shifted in the direction A' in the figure and offset in the direction A', the hydraulic cylinder 10 moves the wedges 2 and 3 in the direction A', and the hydraulic cylinder 6 moves the inner wedges 7 and 8. Move in direction A′. By making the movement stroke of the hydraulic cylinder 6 larger than the movement stroke of the hydraulic cylinder 10, the work roll 14 is shifted in the A' direction and offset in the A' direction.

When the work roll 14 is shifted in the A direction and offset in the direction of the opening, the inner wedge 7 is moved by the fluid pressure cylinder 6.
, 8 in the A direction, and the hydraulic cylinder 10 moves the wedges 2 and 3 in the A' direction. In this case, the wedges 2 and 3 may be fixed.

When the work roll 14 is shifted in the A' direction and offset in the mouth direction, the inner wedges 7 and 8 are moved in the A' direction, and the wedges 2 and 3 are moved in the A direction. In this case as well, the wedges 2 and 3 may be fixed.

When the work roll 14 is shifted (in the case of crossing the work roll 14, for example, the work roll 14 is shifted in the A direction, and the work roll 1
When moving the illustrated end of 4 toward the mouth and the unillustrated end toward the mouth, the fluid pressure cylinder 6 moves the inner wedges 7 and 8 in the direction A, and the hydraulic cylinder 10 The wedges 2 and 3 are moved in the direction A by the hydraulic cylinder 10 so that the movement stroke of the hydraulic cylinder 6 is larger than the movement stroke of the hydraulic cylinder 6. move in the direction.

The work roll 14 can be tilted in any direction by moving the wedges 2, 3 and the wedges 2, 3 corresponding to the wedges 2, 3 in opposite directions.

In the embodiments of the present invention, a case where a piston for roll bending is provided has been described, but it is possible to implement the invention without providing the piston, and the present invention can be applied to rolling mills with any number of stages, such as 4, 5, or 6 stages. It goes without saying that the present invention can be applied to rolling mills with varying rolling levels, and that various other changes can be made within the scope of the invention without departing from the gist of the invention.

[Effects of the Invention] The rolling mill of the present invention includes a wedge that contacts the rolling mill housing window and an inner wedge that slides on the slope of the wedge and whose position in the rolling roll axis direction and rolling line direction is variable, Since the rolling roll is supported through the inner wedge, rolling roll shifting and offset or crossing can be performed easily and quickly, and the device for shifting and the device for offset or crossing are the same. Because it is a device, the structure is simple, equipment costs and operation and maintenance costs are low, and rolling rolls can be replaced quickly, etc., and various other excellent effects can be achieved.

[Brief explanation of drawings]

The figure is a detailed explanatory diagram of the present invention. In the figure, 1 is a rolling mill housing, 2 and 3 are wedges, 4.5 is a support arm, 6 is a fluid pressure cylinder, 7 and 8 are inner wedges, and 9
1 is a support arm, 10 is a fluid pressure cylinder, 11 is a piston, 1
2 is a work roll axle box, 13 is a bearing, and 14 is a work roll.

Claims (1)

[Claims] 1) A pair of front and rear wedges whose opposing surfaces are inclined and parallel when viewed in plan are arranged on the inner wall of the rolling mill housing window so as to be movable in the width direction of the rolled material, and between the opposing surfaces of the wedges, A rolling mill characterized in that an inner wedge capable of supporting a rolling roll via an axle box is disposed so as to be movable in the width direction of a rolled material.