The company has a quilting grinding tube unit 4, can be processed to produce 30 - 600 quilting grinding tube (HM tube cylinder tube). The company produces quilting grinding tube (HM tube cylinder tube) to achieve the basic roughness Ra ≤ 0.08μm around, fix roundness, ovality may ≤ 0.01mm, improved surface hardness, so that by eliminating deformation, hardness HV ≥ 4 °, after processing of residual stress layer, improve fatigue strength increased by 30%, increase with the quality, reduce wear and extend the life of parts. Quilting steel cylinder cylinder tube mill HM pipe pipe pressure, pneumatic cylinder size and precision processing methods cylinder diameter mm length m Straightness mm / m internal diameter precision bore wall thickness difference roughness μ m drawing 40-320 ≤ 12M 0.2 -0.5 H8-H10 ± 5% 0.8-1.6 cold rolled 30-100 ≥ 12M 0.2-0.5 H8-H10 ± 5% 0.8-1.2 drawing - honing 40-500 8M 0.2-0.3 H7-H9 ± 5% 0.2- 0.8 drawing - Rolling 40-400 7M 0.2-0.3 H8-H9 ± 5% 0.2-0.4 Shandong quilting grinding tube is a cold drawn or hot processed through a high-precision steel material. Since HM pipe outer wall oxide layer to withstand high pressure without leakage, high-precision, high-quality finish, cold deformation, flaring, flattening without cracks a bit, so the main pneumatic or hydraulic components used in the production of products, such as cylinder or cylinders , which can be seamless. HM the chemical composition of carbon C, silicon Si, manganese Mn, S, P P, chromium Cr. Quilting grinding tube is a cold drawn or hot processed through a high-precision steel material. Since HM pipe outer wall oxide layer to withstand high pressure without leakage, high-precision, high-quality finish, cold deformation, flaring, flattening without cracks a bit, so the main pneumatic or hydraulic components used in the production of products, such as cylinder or cylinders , which can be seamless. HM the chemical composition of carbon C, silicon Si, manganese Mn, S, P P, chromium Cr quilting tube mill rolling process used, leaving the surface of the surface layer of residual compressive stress, contribute to the closed surface microcracks, impede erosion expansion. Thereby improving the corrosion resistance of the surface, and can delay fatigue cracks or expanded, thus increasing the quilting grinding tube fatigue strength. Forming by rolling, cold rolling surface layer of the hardened layer, reducing the contact surface grinding sub-elastic and plastic deformation, thereby increasing the wear resistance of the inner wall of quilting tube mill while avoiding the grinding of burns . After rolling, the surface roughness decreases, with the properties can be improved. Rolling process is a non-chip processing, and the temperature of the plastic deformation of a metal, so that the surface level of the micro-roughness rollers so as to change the surface structure and mechanical properties, shape and size of the objective. Therefore, this method can be simultaneously achieved finishing and strengthening both purposes, can not be done by grinding. Quilting materials commonly used tube mill 10 # 0.07 ~ 0.13 0.17 ~ 0.37 0.35 ~ 0.65 ≤ 0.035 ≤ 0.035 20 # 0.17 ~ 0.23 0.17 ~ 0.37 0.35 ~ 0.65 ≤ 0.035 ≤ 0.035 35 # 0.32 ~ 0.39 0.17 ~ 0.37 0.35 ~ 0.65 ≤ 0.035 ≤ 0.035 45 # 0.42 ~ 0.50 0.17 ~ 0.37 0.50 ~ 0.80 ≤ 0.035 ≤ 0.035 40cr 0.37 ~ 0.44 0.17 ~ 0.37 0.50 ~ 0.80 ≤ 0.035 ≤ 0.035 0.08 ~ 1.10 25Mn 0.22 ~ 0.2 0.17 ~ 0.37 0.70 ~ 1.00 ≤ 0.035 ≤ 0.035 ≤ 0.25 37Mn5 0.30 ~ 0.39 0.15 ~ 0.30 1.20 ~ 1.50 ≤ 0.015 ≤ 0.020