CN103316925B - Calibration method for central line of vertical roll of roughing mill - Google Patents

Abstract

The invention relates to the field of roughing mill production control, in particular to a method for calibrating a vertical roll center line of a roughing mill. Compared with the prior art, the method has the advantages that the offset of the central line of the vertical roll of the roughing mill and the rolling central line can be accurately measured only by using a simple measuring tool, the central line of the vertical roll of the roughing mill is overlapped with the rolling central line through the setting of an adjusting program, the rolling intermediate blank is ensured to be parallel and straight, the operation is convenient, the product quality can be obviously improved, and the accident of rough rolling and bending of large steel clamps is avoided.

Description

A Calibration Method for Vertical Roller Centerline of Roughing Mill

technical field

The invention relates to the field of production control of a roughing mill, in particular to a calibration method for the center line of a vertical roll of a roughing mill.

Background technique

The rough rolling mill of the hot-rolled 2150 production line has a front and rear double vertical roll structure, and calibration operations must be carried out after each vertical roll replacement. As shown in Figure 1, the calibration method is to measure the distance between the working side and the transmission side of the vertical roller and the center line of the vertical roller, and input the measured values into the first-level screen to complete the calibration. The vertical roll bearing box 1 and the vertical roll 2 of the roughing mill are an integral structure, and the center line 3 of the vertical roll is obtained from the nose bridge 4 in the middle of the vertical roll as a measurement reference point. After the vertical roll is replaced in the roughing mill, the rough The inner spacing of the front vertical roller and the inner spacing of the rear vertical roller of the rolling mill, and obtain a vertical roller centerline with the bridge of the nose as the measurement reference point, and respectively divide the working side of the front vertical roller, the driving side of the front The measured value of the distance between the roller transmission side and the centerline of the vertical roller is input into the program to calibrate the vertical roller. However, because the nose bridge is a detachable structural part, in the long-term production, due to vibration, wear and other reasons, the rolling centerline and the vertical roller centerline Deviations occur, causing the slab to deviate after being rolled by the rough vertical roller, and it is easy to have a vicious accident of steel jamming due to the large head and tail bend of the middle billet hitting the roller guard plate.

Contents of the invention

The purpose of the present invention is to provide a calibration method for the vertical roll centerline of a roughing mill, to ensure that the vertical roll centerline coincides with the rolling centerline, and to prevent the vicious steel jamming accident caused by the deviation of the slab during the rolling process.

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

A method for calibrating the vertical roll centerline of a rough rolling mill. The centerline of the rolling mill archway is used as the benchmark of the rolling centerline, the offset of the vertical roll centerline is determined and the program setting is corrected. The specific calibration steps are as follows:

1) After the vertical roll is replaced in the roughing mill, a center line of the vertical roll is obtained with the bridge of the nose as the measurement reference point, and the working side of the front vertical roll, the driving side of the front vertical roll, the working side of the rear vertical roll and the driving side of the rear vertical roll are respectively measured. The measured value of the center line of the roller is input into the program to calibrate the vertical roller;

2) Measure the inner distance L1 on the entrance side of the rough rolling mill archway and the inner distance L2 on the exit side of the archway respectively, and determine the connection line between the center point on the entrance side of the rough rolling mill archway and the center point on the exit side of the archway as the rolling center line according to the measured values. Extend the connecting line between the front vertical roller and the rear vertical roller and fix it;

3) Measure the distances La and Lb from the working side of the front vertical roll and the driving side of the front vertical roll to the rolling center line of the roughing mill, and the distances Lc and Ld from the working side of the rear vertical roll and the driving side of the rear vertical roll to the rolling center line, And calculate the measurement deviation value of the front vertical roller and the rear vertical roller, where: the deviation value of the front vertical roller = La-Lb, the deviation value of the rear vertical roller = Lc-Ld;

4) Determine the offset of the center line of the vertical roller according to the deviation value in step 3), where the offset of the front vertical roller = (La-Lb)/2, the offset of the rear vertical roller = (Lc-Ld)/2, Correct the vertical roll centerline setting in the program so that the vertical roll centerline coincides with the rolling centerline.

Compared with the prior art, the beneficial effect of the present invention is that only a simple measuring tool can be used to accurately measure the offset between the center line of the rough rolling mill vertical roll and the rolling center line, and the rough rolling vertical roll can be adjusted by adjusting the program settings. The center line of the roll coincides with the center line of the rolling to ensure the straightness of the rolling intermediate billet, which is convenient to operate, can obviously improve the product quality, and avoids the occurrence of accidents in rough rolling and bending of large jammed steel.

Description of drawings

Figure 1 is a schematic diagram of the calibration of the vertical roll centerline of a conventional roughing mill;

Fig. 2 is a schematic diagram of the calibration method of the present invention.

In the figure: 1-vertical roll bearing box 2-vertical roll 3-vertical roll center line 4-nose bridge 5-rough rolling mill archway 6-front vertical roll 7-rear vertical roll 8-rolling center line 9-horizontal work roll bearing box 10-horizontal work roll

detailed description

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

See Figure 2, which is a schematic diagram of a calibration method for the vertical roll centerline of a rough rolling mill of the present invention. The tools required by the present invention include a scale and a bar line. The present invention uses the centerline of the rolling mill archway as the rolling centerline benchmark to determine the vertical roll centerline Line offset and correct program settings, the specific calibration steps are as follows:

1) After replacing the vertical rolls in the roughing mill, measure the inner distance between the front vertical roll 6 and the rear vertical roll 7 according to the conventional method, and obtain a vertical roll centerline 3 with the bridge of the nose as the measurement reference point. The vertical roll calibration is performed by inputting the measured values from the working side of the front vertical roll, the driving side of the front vertical roll, the working side of the rear vertical roll and the driving side of the rear vertical roll to the center line of the vertical roll;

2) Measure the inner distance L1 on the entrance side of the rough rolling mill arch 5 and the inner distance L2 on the exit side respectively, then the central point of the entrance of the archway = L1/2, and the center point of the exit of the archway = L2/2; the rough rolling mill archway 5 and the horizontal work roll bearing box 9 It is an integral structure with the horizontal work roll 10. According to the measured value, the connection line between the center point of the entrance of the rough rolling mill and the center point of the exit of the archway is determined as the rolling centerline 8, and the center point between the entrance center point of the archway and the center point of the exit of the archway is drawn. A bar line passes between the front vertical roller 6 and the rear vertical roller 7 and is fixed, making sure that the bar line is straight;

3) Measure the distance La and Lb from the working side of the front vertical roll 6 and the driving side of the front vertical roll to the rolling center line of the rough rolling mill, and the distance Lc from the working side of the rear vertical roll 7 and the driving side of the rear vertical roll to the rolling center line 8 and Ld, and calculate the measurement deviation value of the front vertical roller 6 and the rear vertical roller 7, based on the working side, where: the front vertical roller deviation value=La-Lb, the rear vertical roller deviation value=Lc-Ld;

4) Determine the center line offset of the vertical roller according to the deviation value in step 3), where the offset of the front vertical roller = (La-Lb)/2, the offset of the rear vertical roller = (Lc-Ld)/2, Among them, when the offset value of the vertical roller is positive, it means that it is offset to the transmission side, and when the offset of the vertical roller is negative, it means that it is offset to the working side. Roller centerline 3 coincides with rolling centerline 8, pay attention to the direction of offset to avoid the problem of offset reversal.

Claims (1)

1. the scaling method of a roughing mill vertical roll centrage, it is characterised in that using mill housing centrage as rolling center Line benchmark, determines that edger roll disalignment amount revision program are arranged, and its concrete demarcating steps is as follows:

1), after edger roll changed by roughing mill, one is obtained using the bridge of the nose as the edger roll centrage of datum mark, respectively by front edger roll Working side, front edger roll transmission side, rear edger roll working side and the rear edger roll transmission side measured value input program away from edger roll centrage is entered Row edger roll is demarcated；

2) measure spacing L1 and interior spacing L2 of memorial archway outlet side in roughing mill memorial archway entrance side respectively, determine slightly according to measured value Described line, as rolling centerline, is prolonged by the line between mill housing entrance side central point and the central point of memorial archway outlet side Extend between front edger roll and rear edger roll and fix；

3) edger roll working side before roughing mill, distance La of front edger roll transmission side to rolling centerline and Lb, rear edger roll are measured respectively Distance Lc of working side, rear edger roll transmission side distance rolling centerline and Ld, and the measurement calculating front edger roll and rear edger roll is inclined Difference, wherein: front edger roll deviation value=La-Lb, rear edger roll deviation value=Lc-Ld；

4) edger roll disalignment amount, wherein front deviated vertical roll amount=(La-Lb)/2 are determined according to the deviation value in step 3), after Deviated vertical roll amount=(Lc-Ld)/2, the edger roll centrage in revision program arranges, makes edger roll centrage overlap with rolling centerline.