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Supporting roller repairing process

A back-up roll and process technology, which is applied in the field of back-up roll repair technology, can solve the problems of unsatisfactory effect of roll sleeve and roll core sleeve, poor use effect, etc., and achieve the effect of improving heat conduction effect.

Active Publication Date: 2021-10-19
杭州奥星实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical problem of unsatisfactory inlay effect of the roll sleeve and the roll core during the repair of the backup roll of the cold rolling mill, the use effect after the repair is not good. On the basis of the inserting process, the back-up roll after the inserting is repeatedly used and ground, and through the alternating load of the rolling force and the thermal deformation of the back-up roll during use, the inner cylindrical surface of the roll sleeve The degree of fit with the outer cylindrical surface of the roller core is continuously increased until it is fully fitted, so that the supporting roller after the nesting can achieve the use effect of the whole solid roller

Method used

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Embodiment 1

[0029] combined with Figure 1-2 , the present embodiment proposes a backup roller repair process, comprising the following steps:

[0030] After machining and heat-treating the roll sleeve 101 and the roll core 100 that has passed the inspection, the roll sleeve 101 is fitted to the outside of the roll core 100 to form a back-up roll; the back-up roll is installed in the cold rolling mill, and the thick material cold rolling is repeated. Then carry out back-up roll surface grinding, a total of n times, repeat thin material cold rolling, and then carry out back-up roll surface grinding, a total of m times, until the back-up roll meets the rolling requirements; wherein n and m are both positive integers.

[0031] In this embodiment, the roll cover 101 and the roll core 100 are flaw detected, machined and heat treated, and the two are set into a back-up roll. The continuous effect of alternating force load and thermal deformation makes the inner cylindrical surface of the rolle...

Embodiment 2

[0051] This embodiment proposes a back-up roll repair process, and the roll core 100 is provided with rounded corners 102 . When the roll core 100 is a forged piece, the forging will retain the stress generated by the forging in the roll core 100, because during forging, when the temperature of the forging piece is gradually cooled, the metallographic changes will reach a balance, but the stress caused by forging will always remain in the component At this time, it is in a balanced state, and cracks may not appear, but the roller core 100 has been mechanically processed, which destroys the stress balance in the roller core 100, and cracks may occur in weak places. These cracks are mainly The cause is due to the forging stress, and part of the reason is caused by the temperature change of machining; therefore, in order to prevent cracks on the roller core 100 after machining, it is necessary to make a circular arc transition at the place where the stress is concentrated, so as t...

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Abstract

The invention relates to the technical field of metal processing, in particular to a supporting roller repairing process. The supporting roller repairing process comprises the following steps of carrying out machining and heat treatment on a roller sleeve and a roller core qualified in flaw detection; inlaying the roller sleeve to the outer side of the roller core to form a supporting roller; and installing the supporting roller on a cold rolling mill, repeatedly carrying out thick material cold rolling and supporting roller surface grinding for n times in total, and repeatedly carrying out thin material cold rolling and supporting roller surface grinding for m times in total until the supporting roller meets the rolling requirement, wherein n and m are positive integers. In order to solve the technical problem that the using effect is poor after the supporting roller is repaired, the invention provides the supporting roller repairing process. The supporting roller is repeatedly used and ground for multiple times after being inlaid; and through the action of rolling force alternating load and thermal deformation of the supporting roller in the using process, the fitting degree of the inner cylindrical surface of the roller sleeve and the outer cylindrical surface of the roller core is continuously increased until the inner cylindrical surface of the roller sleeve and the outer cylindrical surface of the roller core are completely fitted, so that the supporting roller subjected to being inlaid achieves the use effect of an integral solid roller.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a backup roller repair process. Background technique [0002] The back-up roll plays an extremely important role in rolling production, so the quality, performance and life of the back-up roll are extremely high, but the back-up roll is a consumable part, and the wear and tear is still serious after long-term use, so a large number of waste back-up rolls are produced. If it is not processed and reused, it will cause waste of resources, and the cost of adopting new support rolls is high. Therefore, it is necessary to repair the waste and old support rolls. [0003] The repair plan usually adopts the method of inserting the old roll. When the diameter of the old roll is reduced to the point that it cannot be used, or the back-up roll with low surface heat treatment hardness is reused, the roll sleeve is placed outside the core to form an insert. Support rolls to realize t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
CPCB23P6/00Y02P70/10
Inventor 陈书平
Owner 杭州奥星实业有限公司
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