The material of the cylinder tube is mainly made of hot-rolled seamless steel tube, which is combined with boring, rolling and cutting technology. With the development of China's industry, it is difficult for the old process to produce hydraulic cylinders to meet the needs of production development. The cylinder tube is a new type of energy-saving product.
Rolled pipe refers to a steel pipe with strict inner and outer dimensional accuracy (tolerance range), good internal and external surface smoothness, roundness and straightness, and uniform wall thickness. After a little honing, this product can be directly used as a hydraulic and pneumatic cylinder block tube, which is of great significance for saving energy and reducing investment in hydraulic cylinder and cylinder processing equipment. The rolling method used is: broaching cylinder-fine boring cylinder-rolling cylinder, the process is 3 parts. After rolling, the surface roughness of the hole is reduced from Ra3.2 to 6.3um before the rolling to Ra0.4 to 0.8um, the surface hardness of the hole is increased by about 30%, and the fatigue strength of the inner surface of the quilted tube is increased by 25%.