Climbing type grinding machine of grinding retained mandrel

Abstract

The invention relates to the field of a grinding machine, in particular to a climbing type grinding machine of a grinding retained mandrel. The climbing type grinding machine of the grinding retained mandrel is characterized in that a rolling bearing bush and a grinding wheel transmission mechanism is included, the inner diameter of the rolling bearing bush matches with the outer diameter of the retained mandrel, the rolling bearing bush comprises a half watt I, a half watt II, raceways, balls and retainers, one end of the half watt I is connected with one end of the half watt in a hinged mode, the other end of the half watt I is connected with the other end of the half watt II through a bolt, the inner cambered surface of the half watt I and the inner cambered surface of the half watt II are respectively provided with two to three raceways, the ball are densely arranged in the raceways, and the retainers are arranged on the inner cambered surfaces of two sides of each raceway. Compared with the prior art, the climbing type grinding machine of the grinding retained mandrel has the advantages that the tightness degree of the rolling bearing bush which matches with the retained mandrel can be adjusted, and the grinding machine can be precisely positioned on the retained mandrel; the grinding machine can climb, move and achieve axial advance of grinding along the axial direction of the retained mandrel on the rolling bearing bush under the action of a plurality of spiral raceways; and an eccentric bushing of a bearing house is adjusted to enable a belt to obtain an appropriate tightness degree.

Description

technical field [0001] The invention relates to the field of grinding machines, in particular to a climbing type grinding machine for grinding stop mandrels. Background technique [0002] In the continuous rolling seamless steel pipe production process, the stop mandrel is an important thermal deformation tool for the continuous rolling mill of seamless steel pipe. Due to the extremely harsh working environment of the stop mandrel, it is subjected to thermal cycle stress and alternating mechanical Due to the effect of stress, defects such as cracks, ring cracks, wear, peeling, and thin diameter appear on the surface of the restraint mandrel, which makes the restraint mandrel unable to continue to be used. [0003] Usually, the stop mandrel is a cylinder with a diameter of 100-460 mm and a length of more than ten meters. The material requirements are high, and the manufacturing process is complicated. Direct scrapping after wear and tear will increase the production cost of s...

AI Technical Summary

Problems solved by technology

Seamless pipe production plants generally do not have large-scale grinding equipment. They can only use hand grinding wheels for manual grinding or self-made simple equipment for repairs. The efficiency is low, and the surface finish of the repaired stop mandrel cannot meet the new product standard.

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