JPS63309311A - Roll profile measuring instrument for rolling mill - Google Patents

Abstract

PURPOSE:To reduce time and labor required to measure a roll profile by equipping a roll profile meter on a roll rearranging truck and by measuring the roll profile at a place adjacent to a rolling stand. CONSTITUTION:The roll rearranging truck 6 is disposed adjacent to the rolling stand, on a pair if rails 15a set on it, work rolls 2, 3 are drawn out. Then, through a roll profile meter supporting device 7 loaded on the other rails 15b, the roll profile meter 8 is set on said work rolls 2, 3. Thus, legs 18a, 18b fixed on a frame 18 of the roll profile meter 8 is abutted on the work rolls 2, 3 to position. In this state, by a displacement sensor 16 of contacting or non- contacting types and a surface thermometer 16a, the roll profile and a surface temp. of the roll are measured. In this way, the roll profile is measured quickly at the position adjacent to the rolling stand.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a device for measuring the profile of a rolling mill roll.

<Prior art> In hot rolling mills, etc., as the amount of rolling increases, the surface of the rolls (work rolls) in contact with the rolling mill may wear locally, or the surface may become rough due to locally attached foreign matter. Damages the surface quality of rolled products. Therefore, it is often necessary to replace the roll with a spare roll, but this roll replacement work requires a lot of time and effort and reduces production efficiency. Therefore,
As a countermeasure, the work roll is installed in the rolling stand of the rolling mill and rotated, and a VFRS body such as a grindstone is pressed against the roll surface and reciprocated in the roll axis direction to remove rough skin and local wear. So-called on-line roll grinding methods are used to reduce the number of roll changes by grinding to a required roll profile.

When grinding a roll using such a method, at least what is required is to accurately measure the roll profile before grinding and to perform grinding based on that data. Therefore, currently, when performing online roll grinding, a roll changer is used to extract the upper and lower work rolls from the rolling stand, and these are transported to a roll shop, etc., where a roll profile meter is used. After measuring each roll using a machine, they were assembled into the rolling stand.

<Problems to be Solved by the Invention> Conventionally, in measuring the roll profile, the roll was taken out of the rolling stand and then transported to a roll shop etc. for measurement, which required a great deal of time and effort. There was a problem in that the original purpose of online roll grinding, which was to improve production efficiency by shortening roll change time, could not be fully achieved.

The present invention has been proposed in view of the above-mentioned problems, and an object of the present invention is to propose a measuring device that significantly reduces the time and labor required for measuring a four-wheel profile for online roll grinding.

Means for Solving the Problems> The roll profile measuring device of the present invention is characterized in that a four-wheel profile meter is mounted on a four-wheel set w truck.

Function> A roll is pulled out from the rolling stand onto a roll changing cart, a roll profile meter is set above the roll, and the roll profile is measured.

Embodiments The roll profile measuring device for a rolling mill according to the present invention will be specifically described based on embodiments.

1 and 2 are a front view and a plan view, respectively, showing a roll profile measuring device according to an embodiment of the present invention. In the figures, 1 is a rolling stand of a rolling mill, and 2 and 3 are upper and lower workpieces, respectively. 4 and 5 are upper and lower roll chocks, 6 is a roll changing cart, 7 is a roll profilometer support device, and 8 is a roll profilometer.

The roll changing trolley 6 has upper and lower frames 9° and 10, and is self-propelled on rails 12 via wheels 1) in a direction Y perpendicular to the line traveling direction Z of the rolling mill. lower frame 10
A pair of rails 14 are laid on the upper surface in a direction X parallel to the line traveling direction 2, and the upper frame 9 is moved along the rails 14 by a feed screw type drive device 1) 13. Further, on the upper surface of the upper frame 9, the moving direction Y of the trolley 6 is provided.
Two pairs of rails 15a, 15b are laid in a direction parallel to , on one rail 15a a work roll 2.3 can be taken out from the rolling stand 1 for profile measurement, while on the other rail 15b A profilometer support device 7 is mounted on top. In addition, when replacing the old and new rolls, the support device 7 is removed from the rail 15b, and a pre-installation is made on either of the rails 15a and 15b.
The roll assembly is mounted, and the upper frame 9 is alternately shifted in the X direction to move each rail 15a, 1
5 Place the center of b, that is, the roll axis 0', on rolling stand 1.
The rolls are rearranged by aligning the roll axis 0 with the roll axis.

The profilometer support device 7 is composed of, for example, a jib crane that can suspend and support the roll profilometer 8 and allow it to be raised and lowered and rotated on a horizontal plane.
It should be removably mounted on 15b using an overhead crane, etc.

The roll profile meter 8 includes a known contact or non-contact type displacement sensor 16, a sensor head 17 that supports the sensor 16, and a known contact or non-contact type roll surface thermometer 16a attached to the sensor head 17. , a drive device 20 for reciprocating the sensor head 17 along the guide rail 19 parallel to the roll axis 0', and each member 1.
7, 19. Frame 18 supporting 20 and sensor 16
, the roll surface thermometer 16a, and the control device for the drive device 20 (
It consists of the main components (not shown).

Hook 2 provided on the swing boom 7b of the support device 7
2, the frame 18 is suspended via a wire 21, and the frame 18 is provided with four legs 18a each having a spherical tip. Therefore, when the roll profile meter 8 is placed on the work roll 2.3, the frame 18 is in-aligned so that the sensor 16 always moves accurately along the roll axis O' regardless of the roll diameter. A belt 24 is wound around a pair of pulleys 23 provided at both longitudinal ends of the frame 18, and the sensor head 17 is fixed to the belt 24. By rotating the sensor head 17 forward and backward using the motor 25, the sensor head 17 is reciprocated along the roll axis O'.

Prior to grinding the work rolls 2 and 3 online, a procedure for measuring the roll profile using the roll profile measuring device configured as described above will be described below.

First, the upper and lower work rolls 2 and 3 are pulled out from the rolling stand 1 onto the rail 15a of the roll changing truck 6 using a conventionally known procedure.

Next, the boom 7b at the upper end of the post I-7a of the jib crane 7, which has been set in advance on a predetermined position on the trolley 6, is lowered together with the hook 22 with a rotational shift, and both ends of the upper work roll 2 are machined in advance and measured. After placing the profile meter 8 on a reference surface (not shown), the sensor head 17 is reciprocated by the drive device 20 to measure the keel profile of the upper work roll 2. Here, the displacement sensor 16 detects the displacement and measures the roll profile of the roll 2, but the roll profile is affected by the temperature of the roll and its distribution. In particular, in hot rolling, there is a difference in roll temperature between when it is used inside the rolling stand and when it is pulled out to the outside of the rolling stand.If you do not know this temperature, it will be difficult to accurately measure the roll profile. I can't. Therefore, in this embodiment, the temperature of the roll is measured and grasped using a roll surface thermometer 16a provided near the displacement sensor 16, and an accurate roll profile is measured. Next, after completing the measurement, hook 22
is raised and the boom 7b is turned 180 degrees to move the profile meter 8 to the opposite roll side as shown by the chain line in FIG.

Next, the upper roll 2 is removed by an overhead crane (not shown) or the like, and the profile of the lower roll 3 is measured in the same procedure as for the upper roll 2. Thereafter, the profile meter 8 is retracted to the side opposite to the rolls, the upper roll 2 is returned to its original position, and the upper and lower work rolls 2 and 3 are assembled into the rolling stand 1 using a conventionally known procedure and grinding is started.

It should be noted that the profilometer 8 can be of a portable type in various conventionally known formats, but it is preferable to use one that can be housed in the support frame 18 with four legs that has a self-aligning function as described above. stomach.

Further, in the above embodiment, the roll profilometer 8 is suspended and supported so that it can be raised and lowered and rotated, but the present invention is not limited to this. l1ilfS
Accordingly, the roll profile meter 8 may be moved along the axis of the roll or retracted.

In addition, although the above embodiment described the work roll,
The present invention can also be applied to backup rolls.

<Effects of the Invention> According to the roll profile measuring device of the present invention, the roll profile can be measured at a location close to the rolling stand, thereby eliminating the conventional trouble of transporting the rolls to a distant roll shop, etc. By eliminating this, you can significantly reduce time and labor, and achieve a significant improvement in production efficiency. Furthermore, by using both the suspension by the wire 21 and the spherical leg 18a as in the above embodiment, the centering of the profile meter 8 on the roll surface can be automatically achieved, which saves time and effort. reduction can be achieved.

[Brief explanation of drawings]

FIG. 1 is a front view of a roll profile measuring device according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. In the drawing, 1 is a rolling stand, 2.3 is a work roll, 6 is a roll changing cart, 7 is a roll profile meter support, 8 is a roll profile meter, 16 is a displacement sensor, and 16a is a roll surface temperature. It is a total. Patent applicant Mitsubishi Heavy Industries, Ltd. Nippon Kokan Co., Ltd. Agent

Claims (2)

[Claims] (1) A roll profile measuring device for a rolling mill, characterized in that a roll profile meter is installed on a roll changing cart. (2) The roll profile measuring device for a rolling mill according to claim 1, wherein the roll profile meter is equipped with a roll surface thermometer.