A Calibration Method for Horizontal Rolling Center Line of Universal Rolling Mill
A rolling center line, universal rolling mill technology, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve problems such as rail head profile defects, and achieve the effect of reducing deviation and reducing scrap
Active Publication Date: 2021-02-26
HANDAN IRON & STEEL GROUP +1
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Problems solved by technology
[0006] Due to the above reasons, the horizontal rolling center line calibrated by the rolling mill will deviate from the center line of the head roll pass, which will cause defects in the profile of the rail head
Method used
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[0023] In this example, refer to the attached image 3 , 4 , the diameter of the horizontal roll is D, the roll width H of the head roll 3, the difference between the diameter of the horizontal roll and the roll ring 7 for calibration is 2T, T=0.5*(H-d), the roll ring for calibration can be determined by the T value 7 in diameter.
[0024] Refer to attached Figure 4 , the direction of the arrow is the movement direction of the roll during calibration, and the dotted line is the position of the horizontal roll during pressing. The roll gap can be positioned normally during the system.
[0025] When calibrating, first make the head roller 3 close to the horizontal roller in the horizontal direction, then make the upper roller 1 and the lower roller 2 move toward each other in the vertical direction, so that the calibration roller ring 7 on the upper roller 1 and the lower roller 2 is simultaneously with the head roller 3 Press the upper and lower surfaces together and maint...
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The invention relates to a calibration method for a horizontal rolling center line of a universal rolling mill, belonging to the technical field of rail rolling in the metallurgical industry. The technical solution is: the upper roll (1) and the lower roll (2) are horizontal rolls, the head roll (3) and the bottom roll (4) are vertical rolls, and the overall arrangement is symmetrical; the head roll (3) has a rolling rail head For the hole pattern of the upper part, set a roll ring for calibration on the side of the upper roll (1) and lower roll (2) close to the head roll (3); when calibrating, first make the head roll (3) close to the horizontal roll in the horizontal direction , and then make the upper roller (1) and the lower roller (2) move towards each other in the vertical direction until the calibration roller rings on the upper roller (1) and the lower roller (2) are pressed against the upper and lower surfaces of the head roller (3) at the same time Close together, the horizontal centerline between the two pressing surfaces is marked as the horizontal rolling centerline (6) of the rolling mill. The beneficial effect of the invention is that the deviation of the center line of horizontal rolling is reduced, thereby reducing the rejects caused by the profile defects of the rail head.
Description
technical field [0001] The invention relates to a calibration method for a horizontal rolling center line of a universal rolling mill, belonging to the technical field of rail rolling in the metallurgical industry. Background technique [0002] In the production of rails, the universal rolling mill is used for finishing rolling. The roll system of the universal rolling mill is composed of a pair of horizontal rolls and a pair of vertical rolls. The horizontal roll rolls the waist of the rail, and the vertical roll on one side has a pass for rolling the head of the rail. It is called the head roll, and the vertical roll on the other side is a flat roll, which is used to roll the bottom of the rail, called the bottom roll. Before using the universal rolling mill, it is necessary to calibrate the horizontal rolling centerline, so that the horizontal roll gap centerline is aligned with the head roll pass centerline. The calibration method of the existing horizontal rolling line...
Claims
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IPC IPC(8): B21B38/00
CPCB21B38/00
Inventor 付国龙顾双全
Owner HANDAN IRON & STEEL GROUP