JPS59156508A - Inline grinding method of roll of rolling mill - Google Patents

Abstract

PURPOSE:To grind inline a work roll to a prescribed roll shape with high accuracy by controlling a grinder in accordance with the detected value of the ruggedness on the roll surface and the detected value of the displacement in the roll position. CONSTITUTION:The ruggedness on the surface of a work roll 1 is detected with the pulse signal from a position pulse detector 17 for detecting a rotating position as a trigger by displacement detectors 10a-c attached to a detector mounting base 11 which moves in an arrow X direction by the operation of a motor 12 and a screw bar 9 in a rolling mill provided with the roll 1 supported freely rotatably by roll chocks 2a, 2b. The run-out of the roll shaft is further detected by displacement detectors 15a, 15b having sensors for detecting the roll position. The values detected with the above-mentioned detectors are inputted to an operational processing unit 19, by which the profile on the straightness in the axial direction of the roll is determined. The grinding body 6 of a roll grinder 7 which can move in arrow X, Y directions is controlled in accordance with said profile and the roll 1 is inline ground.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-line grinding method for rolling mill rolls. 6 Normally, as the rolling amount of rolling rolls such as hot tandem rolling mills increases, the work roll surface ( The plate threading section) is subject to wear and deformation, as well as foreign matter adhering locally, which impairs the surface quality of the pressure product. For this reason, by moving the sheet threading section from the wide loft to the narrow loft in sequence after the rolls are reassembled and until the last roll is reassembled, the negative impact on the shape quality of the rolled products due to roll threading wear is minimized. As a result, the rolling schedule is limited and this is an extremely large constraint on production efficiency.When rolling materials with various widths, such as OC, the rolling surface in the axial direction of the work roll is (Profile) is
It wears out in a step-like manner.For this reason, the periodic kid rolling is stopped and replaced with a pre-adjusted roll that has been adjusted in advance, and the degraded roll is ground by an off-line method. In this case, the production volume decreases due to the suspension of rolling work due to roll rearranging work, as well as the transportation of deteriorated rolls and roll chocks to a grinding and maintenance shop, and the installation and removal of attached products, which requires a great deal of labor and time, making it economical. The disadvantage is that the loss is large.

As a countermeasure against this problem, various types of online roll grinding means (for example, JP-A No. 54-131554 and JP-A No. Showa 55-81
No. 007, etc.) have been proposed.

Among these, the one shown in Japanese Patent Application Laid-Open No. 54-131554 is
Directly measure the roll profile before grinding online, and without grinding the roll based on the measurement, the grinding table is set in the axial direction of all rolls on the grinding table based on the pre-formed reference plane in the non-rolling area on both sides of the roll. This method attempts to obtain a predetermined roll profile by avoiding the effects of roll shaft runout and roll deviation caused by nozzling, roll chocks, and gaps between the roll chock and roll shaft. ◎ Therefore, it is difficult to set a rational and economical amount of grinding that corresponds to the substantial profile of the roll, such as the step wear mentioned above.

Also, what is shown in JP-A-55-81007 is the amount of wear predicted by him before online roll grinding.

In other words, it is a child-side grinding method in which the roll is ground online by grinding the child-side roll profile.Since the substance of the roll profile is not directly measured, it is difficult to obtain a predetermined profile with high precision. In view of the above-mentioned prior art, the invention has the disadvantage that the correct roll shape (axial straightness profile) before grinding is 2'tIIIi.
It is an object of the present invention to provide an in-line grinding method for a rolling mill roll that obtains a predetermined roll shape with a high degree of consistency. , based on this, the busy grinding body is controlled, and the roll position change determined based on the signals from multiple roll position detection sensors iiKyotsu1
According to the seventh technology, the roll shape t- is measured without being affected by the rotational error of the roll and the motion error of the measuring device by performing calculation processing while correcting the measurement of the plurality of shape detection sensors. Embodiments of the present invention, which are the basis of the idea, will be explained in detail based on the drawings. Figure 1 is a plan view schematically showing a grinding device for upper work rolls that implements an example method of the present invention. It is a diagram. As shown in the figure, the work roll l is rotatably supported at both ends by roll chocks 2a and 2b, and moves up and down within the housings 3a and 3b, and also moves on the mill spindle 4 on the drive side A of the rolling mill.
It rotates by being supplied with driving force by a rotary drive device (not shown) through the drive side A of the rolling mill and the working side 1il.
Ktd on the beam 5 disposed between the housings 3a and 3b with the llB, the roll grinding amount [ A beam 8 is provided between the housings 3a and 3b on the opposite side of the roll grinding amount ft7 with the work roll l in between. The screw shaft 9 has both ends supported by bearings 14a and 14bK fixed to the beam 8, and a detector mount i1 is screwed thereto.Thus, the pulse motor 12 is driven to generate a deceleration 1tia. through screw 4
1+9 is rotated so that the detector mounting base 11 can be moved in the X direction. This detector mounting base 11 has three displacement detectors (roll profile detection sensors) 10a, 10b, 1 at equal intervals of 4t in the X direction.
0 c is provided and moves in the roll axis direction as the detector mounting base 11 moves to detect irregularities in the roll axis direction of the work roll l. Also, the VJ of the work roll l
Two (in some cases, four) displacement detectors (roll position detection sensors) 15a are installed at equal intervals near the outer peripheral surfaces of the 1fl roll neck portions 1a and 1b, respectively.
, 15b, 15c, and 15d are arranged - That is, this part is shown in Figure 81!2 (a) when viewed from the left side and Figure 2 (b) when the same part is viewed from the right side #I. , displacement detectors 15a, 15b, 15c.

15d! -1 The work roll 1 and the displacement detector 10a are fixed to the pedestal 8a and gb fixed to the beam 8.

10b, 10c and detector mount 11 or beam 8
It is designed to detect a relative position change ik with respect to ik. These displacement detectors 10a, 10p15a, 15b, 15c
, 15d are preferably non-contact type. Furthermore, the roll neck portion 1a.

The test object 16a is located at a plurality of locations (four Pj'I in the X embodiment) in the circumferential direction of the outer circumferential surface of one side of lb (this embodiment is the drive side A).

16b, 16C, and 16d are attached to this object 1.
6a, 16b, 16c, 16d as position pulse detector 17
The rotational position of the wrinkle roll l can be detected by detecting the roll neck part 1.
A test object 16e is also attached to the test object 16e.
The rotation origin pulse detector 18 detects the rotation origin pulse detector 18 to check the rotation origin of the wrinkled crawl l. Position pulse detector 17 and rotation origin pulse detector'
1g is fixed to the pedestal 8a, and the origin pulse detector 18, pulse motor 12, and grinding body 6 are each connected to an arithmetic processing unit 19.

The upper work roll grinding device 20 having the above configuration is also attached to the lower work roll section (not shown). , or if you want to measure the profile of the firefly in the roll axis direction, first measure the work roll l.
While rotating the stone at an appropriate speed, the pulse motor 12 and screw shaft 9 are rotated in response to a predetermined feed amount command (command for each interval t) from the arithmetic processing unit 19, and the displacement detector is 10a, 10b, and 10c are moved, for example, to the work side B, and the amount of unevenness in the roll axis direction and the amount of change in the roll position are detected using signals from the displacement detectors 1sa and isb as triggers.

At this time, if the moving speed of the displacement detectors 10a, 10b, and lOc is set to the interval t per rotation of the work roll l, it is possible to keep the displacement detectors 10a, 10b, and 10c continuously moving. The data can be sampled in the state (without the need for moving or stopping operations).
This is due to the gap between the roll chocks 2a, 2b and the work roll 1.

Next, the amount of unevenness in the roll axis direction is corrected (by proportional calculation method) according to the amount of change in the roll position, and sampling data for a set of three displacement detectors 10a, 10b, 10c is obtained, and each position in the circumferential direction is By performing arithmetic processing from the data set (a set of three data x the number of sampling points) corresponding to the data set by the arithmetic processing unit 11C, the data set is not influenced by the axial ridges and pitching of the screw 9.
Obtain accurate roll axial straightness profile. Accordingly, displacement detectors 10a, 10b.

By appropriately selecting the moving area of 10c, the roll profile of the entire length of the work roll l or any area can be easily measured.Here, as described above, the three displacement detectors 10a, 10b, Regarding the measurement method using 1OcK, see Japanese Patent Application No. 167561/1982, and the measurement method using two displacement detectors from Japanese Patent Application No. 56-09.
No. 3240, respectively, had already been proposed by the applicant. After obtaining a highly accurate physical profile of the work roll 1 to be ground or after grinding, the calculation processing unit 19 Based on the output data signal, the cutting amount and lateral feed amount of the grinding body 6 of the roll grinding device 7 are automatically controlled by a known control device (for example, a numerical control device), etc. (not shown). Can be ground to a predetermined profile with high precision. Furthermore, by knowing the actual profile before grinding, grinding can be carried out to the minimum necessary profile in accordance with the state of wear of the work roll. For example, temporary grinding is performed to smooth only the stepped worn portion.

As specifically explained above in conjunction with the embodiments, the method of the present invention makes it possible to measure the roll straightness profile to a high degree of glaze before or after grinding the work roll in-line, and also to feed back the measurement data and roll the work roll. Since it is possible to control the amount of cutting and the feed rate of the grinding device, it is possible to easily obtain a predetermined profile with high precision at all times. It is possible to eliminate restrictions on rolling schedules such as those that determine rolling schedules, and it can also contribute to improving production efficiency by extending the interval between roll changes.

[Brief explanation of drawings]

FIG. 1 is a plan view schematically showing an upper work roll grinding device that implements the embodiment method of the present invention, and FIG. 2(a) is a side view of the displacement detectors 15a and 15c seen from the left side.
FIG. 2 υ) is a side view of the displacement detectors 15b and 15d viewed from the right side. In the drawing, 1 is a work roll, 2a, 2b are roll chocks, 7 is a roll grinding device, IQa, iob, IOC, HH peak 15a+15b, 1
5c and 15d are displacement detectors, and 17 is a position pulse detector. Patent Applicant: Mitsubishi Heavy Industries, Ltd., Patent Attorney, Patent Attorney Shibu Mitsuishi (and 1 other person) Procedural amendment (method) June 29, 1988 To the Commissioner of the Patent Office, 1, q mark 1 indication 1984 patent application No. 28604 Showa; 1st trial No. 2, Name of invention In-line grinding method for rolling mill rolls 3iIl if 1ji41, "ν" 1 series special liver applicant 2-5-1 Marunouchi, Chiyoda-ku, Tokyo 6. Drawings to be amended Date of publication: 7. Contents of amendment: Figures 1 and 2 (al, (b)) of the drawings are amended as per the attached drawings. 8. Catalog drawings of attached documents
l Letter of amendment through the procedures June 29, 1980 Dear Commissioner of the Japan Patent Office 1, Indication of the case 1988 Patent Application No. 28604 Trial in 1982
Judgment No. 2, Name of the invention In-line grinding method for rolling mill rolls 3-11iil is '1↓('l) Patent Applicant 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Postal code 107 Hikari 6 , "Detailed Description of the Invention" column of the specification to be amended. sl is ÷ shown in Figure 2 (a)
1 and 2 shown in FIG. 1 are connected to ÷2 shown in FIG. 2 Φ). ” to join.

Claims (1)

[Claims] The in-line grinding device of the rolling mill roll uses a grinding device to grind the surface of the work roll with 1 inch of ink.The work roll is moved in the direction of the roll axis parallel to the roll axis while grinding the surface of the work roll. By associating the output obtained while rotating the work roll of a displacement detector that detects the distance between ω with the output of a position pulse detector, etc. In addition to detecting the amount of unevenness on the work roll surface in the roll axis direction corresponding to the roll position in the direction, another displacement detector that detects the distance to the work roll surface at the same position is rotated. The amount of unevenness is corrected using the output representing the swing pm of the roll axis of the work roll due to the play between the work roll and the roll chock, which is obtained, to obtain the true @ anti-flow fill in the roll axis direction of the work roll. 1. A method for in-line grinding of a rolling mill 0-roll, characterized by: controlling a roll grinding device based on the above to grind the surface of the 9-rolls.