JPS5868410A - Rolling mill equipped with roll grinding device - Google Patents

Abstract

PURPOSE:To grind a roll into a desired rolling roll profile, by providing a device for measuring a cross-sectional shape of roll in the direction of the roll axis by putting both ends of a reduction roll as the reference points in roll diam. measurement and grinding the roll basing on said measured cross-sectional shape. CONSTITUTION:A roll profile measuring device 5 is attached to a beam 7 spanned between both housings placed at driving and operating sides by cylinders 6a and 6b which retreat and advance the device 5, and is movable in the direction perpendicular to the roll 2 axis. Further, the device 5 has numbers of noncontacting distance meters 8 located against the roll 2 surface. On the other hand, a roll grinding device consists of an edged tool 10, a grinder 11 having a mechanism to move the tool 10, and a mechanism 12 to move the grinder 11 in the direction of the roll 2 axis. Then, the grinding device grinds the roll 2 so that the space of the roll 2 coincides with a previously set roll cross-sectional shape which is measured with the aid of the device 5 by putting the roll ends at the driving and operating sides as the reference points of roll measurement.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill, and particularly to a rolling mill equipped with a roll grinding device that can reduce the frequency of roll replacement and shorten rolling down time.

In conventional rolling mills, rolls that have been worn or damaged due to rolling are pulled out of the rolling mill housing, reworked using a dedicated roll grinder installed separately from the rolling mill, and then reassembled into the Howsong for use in rolling operations. . Of course, when pulling out the old roll, a new, revised roll is installed, but this roll replacement work takes several minutes to several tens of minutes for the work rolls of a 4-high or 6-high rolling mill for thin plate rolling. As a result, the equipment operation rate will decrease. Further, as the rolling operation is carried out, the roll gradually wears out, and the part that contacts the rolled material becomes concave and has a concave shape. In order to avoid the influence of the concave shape of the rolls on the rolled material, it is necessary to create a product schedule to move from wide material to narrow material in order, but this is inconvenient and limits the production plan.

Various inventions have been made to perform grinding while the rolls are still installed in a 10,000 rolling mill, but it has been discovered that the parallelism between the roll axis and the feed axis of the cutter has been ensured, and the function has been fully demonstrated. not present.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rolling mill equipped with a roll grinding device that solves the above-mentioned problems and is capable of grinding rolls to a desired rolling roll profile.

The present invention includes a device that measures the cross-sectional shape of the roll in the axial direction of the roll using both ends of the roll as a reference point for measuring the roll diameter, and the cross-sectional profile of the roll is determined to have a desired shape based on the measured cross-sectional shape of the roll. Since roll grinding is performed so that the roll is ground, the roll can be reliably and accurately ground while the roll is assembled in the housing.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing the arrangement of work rolls, a roll profile measuring device, and a roll grinding device of a rolling mill with a roll grinding device.

The roll 2 built into the housing 13-1d is fixed to the housing via bearing boxes 3a, 3b and supports 4a-4d. The roll profile measuring device 5 is attached to a beam 7 passed between the drive side housing and the operation side housing by cylinders 5a and 5b that retract and advance the device, and is movable in a direction perpendicular to the roll axis. It has a structure that allows it to be evacuated when changing rolls. A large number of non-contact distance meters 8 are attached to the roll profile measuring device 5 facing the roll surface, especially the distance meters ga at both ends.

A non-contact distance meter 8 installed opposite the roll surface detects the parallelism between the roll 2 and the roll profile measuring device 5. Specifically, it is an eddy current type displacement detector that can obtain an electrical output proportional to distance.

On the other hand, the roll grinding device has a grinder 11 equipped with a blade 10 and a mechanism (not shown) for moving the blade 10 in a direction perpendicular to the roll axis. It consists of a mechanism 12 that moves the grinder 11 in the roll axis direction while being supported by a beam 13 passed between the drive side and operation side housings, and the grinder 11 is moved so that the profile measured by the profile measuring device 5 becomes a predetermined profile. to perform grinding.

FIG. 2 is a vertical sectional view of the work roll 2, the reinforcing roll 14, the roll profile measuring device 5, and the grinding device. Each device is arranged with respect to the upper and lower work rolls so as not to interfere with the rolling operation.

Beam 7.11 passed between drive side and operating side housing
r. It may also serve as a cooling device that passes the roll cooling liquid and jets the liquid from the nozzle.

According to this embodiment, in order to accurately measure the cross-sectional shape of the roll when it is installed in a rolling mill, that is, under a situation where the roll axis can move several millimeters vertically and horizontally on the driving side and the operating side separately, A device is provided that determines a reference position in the radial direction of the roll that is unrelated to wear, recognizes the relative position of each point in the axial direction of the roll surface from this reference position, and measures the cross-sectional shape of the roll. This device automatically compensates for measurement errors caused by misparallelism between the roll and the reference axis of the measuring device, so there is no need to install it directly on the roll, and it can be installed on the rolling mill housing so that the cross-sectional shape of the rotating roll is on the side. It is possible to distort. - Similarly, the mill grinding device is installed in the rolling mill housing and grinding is carried out while monitoring the results detected by the roll cross-sectional shape measuring device, so it is not affected by the parallelism error between the grinding tool movement axis and the roll axis. It becomes possible to grind the roll into a predetermined cross-sectional shape.

According to the present invention, it is possible to accurately measure the roll profile while the roll is still installed in the rolling mill, so it is possible to measure the roll profile under the same conditions as during rolling, including roll wear and thermal crown. Since grinding can be carried out while monitoring the measurement results, the roll shape can be managed with extremely high precision, resulting in an excellent plate crown and shape. Furthermore, according to the present invention, grinding can proceed without changing the rolls, so the rolling bath (
1) During the process, the roll profile can be easily modified, and any material can be rolled at any time according to product specifications without the need to schedule rolling materials in consideration of wear patterns as in the past. As a result, productivity is improved. Furthermore, since there is almost no need to perform grinding by changing the rolls, the rolling stoppage time due to changing the rolls is also shortened and the operating rate is improved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a rolling mill with roll grinding equipment according to an embodiment of the present invention, and FIG. 2 is a front view of FIG. 1. 2... Roll, 5... Roll profile measuring device e
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Claims (1)

[Claims] 1. In a rolling mill equipped with a rolling roll and a device for grinding the rolling roll built into the No-Ujifugu, the drive side and operation side roll end of the roll is used as a reference point for measuring the roll diameter. A device for measuring the roll cross-sectional shape in the roll axis direction is provided, and the roll grinding device is configured to grind the roll so that the roll cross-sectional shape measured by the measuring device matches a preset target cross-sectional shape. A rolling mill with a roll grinding device. 2. A rolling mill with a roll grinding device according to claim 1, wherein reference points for measuring the roll diameter are provided at both ends of the long end of the roll body where the rolled material does not pass.