Method for manufacturing cylinder barrel for hydraulic cylinder

Abstract

The invention discloses a method for manufacturing a cylinder barrel for a hydraulic cylinder. According to the method, a hot rolled coil plate serves as a raw material, and the method comprises the following steps that (1) a coiled plate is cut into strip steel; (2) the strip steel forms a welded pipe by ERW welding; (3) tempering heat treatment is carried out on the welded pipe; (4) cold reduction is performed on the welded pipe; (5) precise straightening is performed on the welded pipe; (6) nondestructive detection is performed on the welded pipe; (7) the fixed ruler of the welded pipe is cut off; and (8) finish machining is performed on the inner surface and the outer surface of the welded pipe. According to the method, the outer diameter and the wall thickness of the ERW welding pipeare fully utilized, the material with high precision and tempering heat treatment is high in strength and toughness, the high-precision and high-precision high-surface finish is achieved, the efficiency is high, the straightness and the roundness of the steel pipe are improved precisely, the straightness and the roundness of the steel pipe are improved, the reliability of the cylinder barrel is improved without damage detection, the outer circle machining allowance is small when the multi-stage cylinder is used, the efficiency is high, and the high concentricity of the welded pipe and the machining allowance of scraping and rolling of an inner hole are small and high in precision and efficiency.

Description

technical field

[0001] The invention provides a method for producing cylinder barrels for hydraulic oil cylinders by using the production technology of quenching, tempering, cold reducing and finishing of ERW welded pipes. It belongs to the field of ultra-deep processing of steel and manufacturing of mechanical parts. It is suitable for high-efficiency mass production of high-precision, high-strength, high-toughness cylinder barrels for hydraulic cylinders. In particular, the cylinder barrel for multi-stage hydraulic cylinders has high production efficiency, high metal yield and low production cost. Background technique

[0002] At present, seamless steel pipes are generally used as raw materials in the production of cylinder barrels for hydraulic cylinders. The conventional production process is the direct processing of seamless steel pipes cut to length and repeated external and internal boring for multiple passes. The metal yield is only 50%. ~55%, and poor mechanical p...