Method for repairing gap between roller cylinder and spindle of upper clamping roller through overlaying welding

Abstract

The invention discloses a method for repairing a gap between a roller cylinder and a spindle of an upper clamping roller through overlaying welding. The method comprises the following steps that the roller cylinder, the spindle, a gland and an expansion ring are disassembled and decomposed; inner side slopes at the two ends of the roller cylinder are treated, and the inner diameter size of the slope of the roller cylinder is measured and recorded; an outer slope of a shaft sleeve A at one end of the spindle is subject to overlaying welding treatment, and the outer slope of the shaft sleeve A and the slope of the roller cylinder are matched; the expansion ring and a shaft sleeve B are temporarily fixed, the outer slope of the expansion ring is subject to overlaying welding treatment, and the outer slope of the expansion ring and the slope of the roller cylinder are matched; and the expansion ring and the shaft sleeve B are divided. The spindle, the roller cylinder, the gland and the expansion ring are reassembled. The method for repairing the gap between the roller cylinder and the spindle of the upper clamping roller through overlaying welding has the beneficial effects that through re-treatment and re-assembly of the spindle and the roller cylinder, the spindle and the roller cylinder are tightly matched, and the grinding and steel rolling use requirements are met. The service life of equipment can be effectively prolonged, normal running of a finish rolling production line is ensured, and product quality of strip steel is ensured. The cost is reduced, and benefits are increased.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a method for repairing the gap between an upper pinch roller and a main shaft by surfacing welding. Background technique [0002] The pinch roll is located in front of the coiler, and its function is to clamp the strip steel coming out of the finishing mill and send the strip steel into the coiler. And, when the tail of the strip leaves the finishing mill, the pinch rollers press the strip so that the strip still maintains a certain tension. There are two types of pinch rollers: upper and lower pinch rollers, which are used in pairs. Such as Figure 1-Figure 3 As shown, the upper pinch roller is a hollow structure, which is composed of roller 1, main shaft 2, shaft sleeve, and expansion ring 3. The surface of roller 1 is surfacing with hard alloy, and the inner side of the end surface of roller 1 is made into a slope with a certain taper. 7. The two ends of main shaft 2 ar...

AI Technical Summary

Problems solved by technology

After several repairs, there will be a gap between the roller 1 and the main shaft sleeve, so that the roller 1 and the main shaft 2 cannot be completely fixed, and the main shaft 2 cannot drive the roller 1 to rotate synchronously.

When the surface is ground, the grinding is not round, the jump is large, or it has a certain impact on the strip steel during use.

[0004] Some measures have also been taken to address this defect, directly using the press to compress the pressure plate, tighten the bolts, etc., but the results are not very satisfactory

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