Low friction cylinder of shock absorber and manufacturing method thereof

Abstract

The invention discloses a low friction cylinder of a shock absorber and a manufacturing method of the low friction cylinder of the shock absorber. The manufacturing method of the low friction cylinder of the shock absorber comprises the following steps: A. raw material pretreatment; B. longitudinal shearing; C. pipe welding. Pipe welding comprises the following steps: uncoiling, shearing and butt welding of the end of the pipe, material storing, rough molding of the welded pipe, welded seam extruding, welding, deburring inside and outside of the welded seam, cooling, refined molding of the welded pipe, eddy current detection, straightening, sizing and cutting off, and finished welded pipe inspecting, wherein the mixture of rust-preventative oil and water is adopted to cool when welding, and an inside and outside arc cutting tool is adopted to deburr, the width of the welded seam is 2 times the wall thickness of the steel pipe; D. cleaning and drying; E. bright annealing; F. dipping in reactive drawing oil; G. the first cold-drawing; H. dipping in reactive drawing oil again; I. the second cold-drawing; J. straightening; K. cutting off; L. chamfering; M. cleaning, welding an upper end-plate, drilling a hole at the lower portion of the steel pipe, immersion in rust-preventative oil, and packing. With the manufacturing method of the low friction cylinder of the shock absorber, the welded seam pipe used for the cylinder can be manufactured, and the friction of the welded seam pipe can meet requirements of the shock absorber for friction.

Description

technical field [0001] The invention relates to a low-friction cylinder barrel of a shock absorber and a manufacturing method thereof. The cylinder barrel of the shock absorber is a cylinder barrel in contact with a working piston of the shock absorber. Background technique [0002] The shock absorber is widely used in automobile suspension systems, and can play a shock absorbing role in both compression and extension strokes. The working piston of the shock absorber makes repeated movements inside the cylinder, and the friction force on the inner wall of the cylinder The size seriously affects the service life and use effect of the shock absorber. If the friction force is too large, the wear of the working piston will increase, and the resistance of the shock absorber will increase, which will affect the shock absorption effect. Therefore, generally speaking, the friction force of the inner wall of the cylinder needs to be Meet the following requirements: the friction force...

AI Technical Summary

Problems solved by technology

The current cylinders are made of seamless steel pipes, and some are made of welded pipes. The cost of seamless steel pipes is too high, and they are generally only used in high-end cars. The cost of welded pipes is low, but the friction cannot achieve shock absorption. device requirements

Images