CN103316925A

CN103316925A - Calibration method for center lines of vertical rollers of roughing mill

Info

Publication number: CN103316925A
Application number: CN2013102269893A
Authority: CN
Inventors: 张守峰; 张华�; 艾铖珅; 李东宇; 史乃安; 张智勇
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2013-06-07
Filing date: 2013-06-07
Publication date: 2013-09-25
Anticipated expiration: 2033-06-07
Also published as: CN103316925B

Abstract

The invention relates to the field of production control of a roughing mill, particularly to a calibration method for center lines of vertical rollers of a roughing mill. The calibration method for the center lines of the vertical rollers of the roughing mill is characterized by determining the deviation of the center lines of the vertical rollers and correcting program setting with a center line of a rolling mill house serving as a benchmark of a rolling center line to enable the center lines of the vertical rollers to coincide with the rolling center line. Compared with the prior art, the calibration method for the center lines of the vertical rollers of the roughing mill has the advantages that the deviation of the center lines of the vertical rollers of the roughing mill and the rolling center line can be accurately measured only through simple measuring tools, and the center lines of the vertical rollers of the roughing mill can coincide with the rolling center line through adjustment of the program setting, so that straightness of rolling of the middle blank row is guaranteed, the operation is convenient, the product quality can be improved significantly, and incidents of steel blocking due to large roughing bending are avoided.

Description

A kind of scaling method of roughing mill vertical roll center line

Technical field

The present invention relates to roughing mill production control field, relate in particular to a kind of scaling method of roughing mill vertical roll center line.

Background technology

Hot rolling 2150 production line roughing mills are forward and backward pair of edger roll structure, will demarcate operation after changing edger roll at every turn.See Fig. 1, its scaling method is to measure respectively edger roll active side, transmission side apart from the distance of edger roll center line, and measured value is inputted the one-level picture finish demarcation.The vertical roll bearing box of roughing mill (1) is overall structure with edger roll (2), edger roll center line (3) is to draw as datum mark with the bridge of the nose (4) in the middle of the edger roll, after roughing mill is changed edger roll, measure respectively first the inboard spacing of the inboard spacing of the front edger roll of roughing mill and rear edger roll, and obtain one with the edger roll center line of the bridge of the nose as datum mark, respectively with front edger roll active side, front edger roll transmission side, rear edger roll active side and rear edger roll transmission side carry out the edger roll demarcation apart from the measured value input program of edger roll center line, but because the bridge of the nose is demountable structure spare, in long-term production, because vibrations, the reasons such as wearing and tearing, cause rolling centerline and edger roll center line deviation to occur, cause slab sideslip after the process roughing vertical roll is rolling, be prone to because the intermediate blank head, the curved serious accident of hitting greatly the roller way protecting plate steel-fastening of tail.

Summary of the invention

The scaling method that the purpose of this invention is to provide a kind of roughing mill vertical roll center line guarantees that the edger roll center line overlaps with rolling centerline, prevents the pernicious steel-fastening accident that the slab sideslip causes in the operation of rolling.

For achieving the above object, technical scheme of the present invention is:

A kind of scaling method of roughing mill vertical roll center line as the rolling centerline benchmark, is determined edger roll disalignment amount and revision program setting with the mill housing center line, and its concrete demarcating steps is as follows:

1) after roughing mill is changed edger roll, obtain one with the edger roll center line of the bridge of the nose as datum mark, respectively front edger roll active side, front edger roll transmission side, rear edger roll active side and rear edger roll transmission side are carried out edger roll apart from the measured value input program of edger roll center line and demarcate;

2) measure respectively the interior spacing L2 of spacing L1 and memorial archway outlet side in the roughing mill memorial archway entrance side, determine line between the central point of roughing mill memorial archway entrance side central point and memorial archway outlet side according to measured value as rolling centerline, described line is extended between front edger roll and the rear edger roll and fixing;

3) measure respectively edger roll active side before the roughing mill, front edger roll transmission side to distance L a and the Lb of rolling centerline, rear edger roll active side, rear edger roll transmission side are apart from distance L c and the Ld of rolling centerline, and calculate the measured deviation value of front edger roll and rear edger roll, wherein: front edger roll deviate=La-Lb, rear edger roll deviate=Lc-Ld;

4) determine edger roll disalignment amount according to the deviate in the step 3), wherein front deviated vertical roll amount=(La-Lb)/2, rear deviated vertical roll amount=(Lc-Ld)/2, the edger roll center line in the revision program arranges, and the edger roll center line is overlapped with rolling centerline.

Compared with prior art, the invention has the beneficial effects as follows, only use simple survey tool just can accurately measure the side-play amount of roughing mill vertical roll center line and rolling centerline, and by the adjustment programme setting roughing vertical roll center line is overlapped with rolling centerline, guarantee that rolling middle blank is capable straight, easy to operate, can obviously improve the quality of products, avoid the curved large steel-fastening accident of roughing to occur.

Description of drawings

Fig. 1 is that conventional roughing mill vertical roll center line is demarcated schematic diagram;

Fig. 2 is scaling method schematic diagram of the present invention.

Among the figure: edger roll 8-rolling centerline 9-horizontal operation roller bearing case 10-horizontal operation roller behind the edger roll 7-before the 1-vertical roll bearing box 2-edger roll 3-edger roll center line 4-bridge of the nose 5-roughing mill memorial archway 6-

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:

See Fig. 2, be the scaling method schematic diagram of a kind of roughing mill vertical roll center line of the present invention, the instrument that the present invention needs has rule and excellent line, the present invention with the mill housing center line as the rolling centerline benchmark, determine edger roll disalignment amount and revision program setting, its concrete demarcating steps is as follows:

1) after roughing mill is changed edger roll, measure respectively first according to a conventional method the front edger roll 6 inboard spacings of roughing mill and rear edger roll 7 inboard spacings, and obtain one with the edger roll center line 3 of the bridge of the nose as datum mark, respectively front edger roll active side, front edger roll transmission side, rear edger roll active side and rear edger roll transmission side are carried out edger roll apart from the measured value input program of edger roll center line and demarcate;

2) measure respectively in roughing mill memorial archway 5 entrance sides spacing L2 in the spacing L1 and outlet side, memorial archway entrance center point=L1/2 then, memorial archway export center point=L2/2; Roughing mill memorial archway 5, horizontal operation roller bearing case 9 are overall structure with horizontal operation roller 10, determine that according to measured value line between the central point of roughing mill memorial archway entrance center point and memorial archway outlet is as rolling centerline 8, between memorial archway entrance center point and memorial archway export center point, draw an excellent line, through front edger roll 6 and after between the edger roll 7 and fixing, must guarantee that excellent line is straight;

3) measure respectively edger roll 6 active side before the roughing mill, front edger roll transmission side to distance L a and the Lb of rolling centerline, rear edger roll 7 active side, rear edger roll transmission side are apart from distance L c and the Ld of rolling centerline 8, and calculate the measured deviation value of front edger roll 6 and rear edger roll 7, take active side as benchmark, wherein: front edger roll deviate=La-Lb, rear edger roll deviate=Lc-Ld;

4) determine edger roll disalignment amount according to the deviate in the step 3), front deviated vertical roll amount=(La-Lb)/2 wherein, rear deviated vertical roll amount=(Lc-Ld)/2, wherein the deviated vertical roll value on the occasion of the time represent to transmission side skew, the deviated vertical roll amount represents when being negative value to enter the calibrating procedure picture to the active side skew, edger roll center line in the revision program arranges, edger roll center line 3 is overlapped with rolling centerline 8, and the direction of attention shift amount avoids occurring being offset reverse problem.

Claims

1. the scaling method of a roughing mill vertical roll center line is characterized in that, as the rolling centerline benchmark, determines edger roll disalignment amount and revision program setting with the mill housing center line, and its concrete demarcating steps is as follows: