JPH055203U - Work roll in-line polishing machine for cold rolling mill - Google Patents

Abstract

(57) [Summary] [Purpose] The work roll of a cold rolling mill is polished inline. [Structure] A circular grindstone having a rotation axis parallel to the axis of a work roll incorporated in a stand, a grindstone rotating means for rotating the grindstone, and a pressing means for pressing the grindstone together with the grindstone rotating means onto the work roll A work roll in-line polishing apparatus for a cold rolling mill, comprising a pneumatic cylinder and a parallel moving means for simultaneously moving a grinding stone, a grinding stone rotating means and a pressing pneumatic cylinder in parallel with the axis of the work roll. [Effect] The service life of rolls is extended.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a work roll in-line polishing apparatus for a cold rolling mill, which polishes a work roll of a cold rolling mill while being incorporated in a stand.

[0002]

[Prior Art]

 For example, the work roll of a cold rolling mill such as a skin pass mill may have rough skin and uneven wear after long-term use, and the designed surface roughness of the roll may deteriorate, so it takes about 15 hours. When used, the roll is taken out of the stand and replaced with a new roll, and the taken-out roll re-polishs the roll surface. In addition to such regular roll change, unplanned roll change may be performed due to a sudden roughening of the roll or seizure of the rolled material on the roll.

[0003]

[Problems to be solved by the device]

 There is a problem in that the work roll replacement of the cold rolling mill or the work roll polishing work described above requires a great deal of labor and cost, and the operation rate is lowered due to the roll replacement.

An object of the present invention is to provide a work roll in-line polishing apparatus for a cold rolling mill, which solves the above-mentioned problems of the prior art and can polish the rolls without changing the rolls. ..

[0005]

[Means for Solving the Problems]

 The work roll in-line polishing apparatus for a cold rolling mill according to the present invention comprises a circular grindstone having a rotation axis parallel to the axis of the work roll incorporated in a stand, a grindstone rotating means for rotating the grindstone, and Consisting of a pneumatic cylinder for pressing the grindstone together with the grinding wheel rotating means against the work roll, and a parallel moving means for simultaneously moving the grindstone, the grinding wheel rotating means and the pressing pneumatic cylinder parallel to the axis of the work roll. It has been done.

[0006]

[Action]

 The work roll in-line polishing apparatus for a cold rolling mill according to the present invention comprises a circular grindstone having a rotation axis parallel to the axis of the work roll incorporated in a stand, a grindstone rotating means for rotating the grindstone, and Consisting of a pneumatic cylinder for pressing the grindstone together with the grinding wheel rotating means against the work roll, and a parallel moving means for simultaneously moving the grindstone, the grinding wheel rotating means and the pressing pneumatic cylinder parallel to the axis of the work roll. Has been done.

Then, when the roll surface of the work roll becomes rough, the grindstone is pressed against the rotating work roll by the pneumatic cylinder for pressing together with the grindstone rotating means, and the grindstone is rotated to polish the roll. At the same time, the parallel moving means moves the grindstone together with the pressing pneumatic cylinder parallel to the axis of the work roll. By doing so, the surface of the work roll can be polished to a predetermined property in a short time without changing the roll.

[0008]

【Example】

 A work roll in-line polishing apparatus for a cold rolling mill according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view showing a state in which a work roll of a skin pass mill is ground by using a work roll in-line polishing apparatus of a cold rolling mill according to one embodiment of the present invention, and FIG. 2 is a front view of the same. ..

The work roll in-line polishing apparatus for a cold rolling mill according to one embodiment of the present invention is rotated by a motor 1 via pulleys 2 and 3 and a belt 4, and a rotary shaft 5 is parallel to the axis of the work roll 21. The whetstone 6 and the whetstone supporting plate 7 on which the whetstone 6 and the motor 1 are mounted are brought close to the work roll 21, and the pneumatic cylinder 8 for pressing the whetstone 6 against the work roll 21 and the whetstone 6 and the pneumatic cylinder 8 are mounted. The lateral feed support plate 9 is constituted by a lateral feed device 11 for laterally feeding along a rail 10 provided between stands 31 of the skin pass mill in parallel with the axis of the work roll 21.

Since the pressure oil supplied to the pneumatic cylinder 8 is supplied after passing through a pressure reducing valve (not shown), the work roll 21 of the grindstone 6 is adjusted by adjusting the pressure reducing valve. It is possible to select an appropriate pressing force to. The lateral feed device 11 will be described in detail. A pinion 13 rotated by a motor 12 is screwed into a rack gear 14 and moves along the rack gear 14. A motor 12 for rotating the pinion 13 is fixed to the back surface of a lateral feed support plate 9 on which the pneumatic cylinder 8 is mounted.

Then, when the pinion 13 rotates, the lateral feed support plate 9 moves in the axial direction of the work roll 21, and accordingly, the pneumatic cylinder 8 moves in the axial direction of the work roll 21. Therefore, the grindstone 6 polishes the work roll 21 while moving in the axial direction of the work roll 21.

FIG. 3 is a graph showing that the life of work rolls before recomposition is extended by using the work roll in-line polishing apparatus of the cold rolling mill according to one embodiment of the present invention. The vertical axis shows the degree of roll surface roughness and the horizontal axis shows the operating time. Compared with the conventional roll reaching the operating limit in 15 hours as indicated by line A, the inline of the present invention is compared. When a polishing apparatus is used, the degree of roll surface roughness is restored by in-line polishing as indicated by C in the line segment B, so that the time until the usage limit is reached is extended due to the recovery.

[0013]

[Effect of the device]

 With this device, it is possible to extend the time until the rolls are recombined and improve the operation rate.

[Brief description of drawings]

FIG. 1 is a side view showing the configuration of a work roll in-line polishing apparatus for a cold rolling mill according to an embodiment of the present invention.

FIG. 2 is a front view showing the structure of a work roll in-line polishing apparatus for a cold rolling mill according to an embodiment of the present invention.

FIG. 3 is a graph showing a usage limit of a work roll.

[Explanation of symbols]

 1 Motor 2 Pulley 3 Pulley 4 Belt 5 Rotating Shaft 6 Grindstone 7 Grindstone Support Plate 8 Pneumatic Cylinder 9 Pneumatic Cylinder 9 Traverse Support Plate 10 Rail 11 Traverse Feed Device 12 Motor 13 Pinion 14 Rack Gear

Front page continuation (72) Inventor Tomoaki Mieno 1-2-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. In the company

Claims (1)

[Claims for utility model registration] 1. A circular grindstone having a rotation axis parallel to the axis of a work roll incorporated in a stand, a grindstone rotating means for rotating the grindstone, and the grindstone. A pressing pneumatic cylinder for pressing against the work roll together with the rotating means, and a grindstone, a parallel moving means for simultaneously moving the grinding wheel rotating means and the pressing pneumatic cylinder in parallel to the axis of the work roll. Work roll in-line polishing equipment for cold rolling mills.