In order to avoid thermal fatigue turtle grain control caused by improper roll a massive spalling,rebar processing equipment which affect the normal operation of equipment, so the gongyi JinDi metallurgical equipment co., LTD., that the establishment of the scientific use of maintenance and grinding system is quite important. JinDi cold rolled ribbed steel bar equipment technical personnel summarize several work roll in use should be paid attention to in the requirements:

1, cooling water to continuous, enough to roll for cooling. In normal work when rolling work roll surface temperature should be strictly controlled, such as roll temperature is too high, it is necessary to immediately replace roll, prevent use roll premature thermal fatigue crack; Roll cooling water should be maintained minimum in the 400-600 m 3 / h;

2, each roll before computer must be roll surface defects (mainly turtle crack) to get rid of. Even if no turtle crack, also want to roll surface fatigue layer removal.

3, roll in the use of appear easily in the turtle crack, the roll normal use hazard is the biggest. Due to the roll turtle crack in rolling initial form. relatively slow, the roll will not produce too serious harm. But when the crack formation to a certain degree, and then continue to use, turtle grain will quickly to the depth and length direction extension. A is a grinding quantity increase, reduce roll mill bar quantity; The second is serious if it will cause the occurrence of spalling, appear even big off meat. Therefore, reasonable use roll, it is suggested that each roll on key service rolled products of 1800 ~ 2400 tons of advisable.

4, when in the process of rolling cooling water system malfunction or appear rolling accident, to roll damage is inevitable. In order to avoid forming deep turtle crack damage, and when something rolling accident, should open mill as soon as possible, reduce the water flow. Roll to the plane check, will turtle crack thoroughly grinding away. Otherwise, computer rolling again, residual crack will rapidly expand, cause big flake produce.

5, cold rolled ribbed steel bar equipment main mill with the roller have to follow the large diameter roll in, small diameter roll in the next match roll use, and the upper and lower roll diameter deviation in 0.05 ~ 0.15 mm is preferred. Mill with roll in this state rolling service, it is able to overcome and reduce workpiece into mill imports on roll instantaneous impact problems of large, protect the roll surface not by the workpiece to roll impact big produce damage.

6, no matter roll in the factory before use or in the use of a stage, on a regular basis, roll on inspection check tracking is a must, which can effectively prevent defect roll when using computer in rolling fault.

7, cold rolling mill try rolling and rolling process adjustment test, the proposal is chosen low hardness value roll to try rolling, can improve the ability of resistance to accident roll.

8, shall establish a complete roll ZhiLiangKa, record roll number, with roller part, the plane on wear and grinding technology data, rolled products quantity, roll surface, the use of information, and the original record filing, a certain stage of roll use information statistical analysis, can effective comprehensive evaluation roll quality good and bad.

1w.jpg

ITPub博客

Cold rolled ribbed steel bar equipment use of work roll

最新文章