Pneumatic cylinder process

Cylinder pneumatic cylinder as a main component monomer pillar mining, pneumatic holder, barrel and other products, the processing quality directly affect the entire product life and reliability. Cylinder machining requirements, the inner surface roughness of Ra0.4 ~ 0.8 & micro; m, concentricity, wear demanding. The basic characteristics of the cylinder is deep processing, the processing has been plagued by processing staff.
Use rolling process, the surface layer leaving the surface residual compressive stress, contribute to the closure of surface microcracks, impede erosion expansion. Thereby increasing the surface corrosion resistance, and can delay fatigue cracks or expanded, thus increasing the fatigue strength of the cylinder. By roll forming, rolling surface layer of cold hardening layer, reducing the elastic and plastic deformation of the contact surface grinding vice, thereby improving the wear resistance of the cylinder wall, while avoiding the burns caused due to grinding. After rolling, reducing the surface roughness values can be improved with nature.
Cylinders are the most important parts of construction machinery, traditional processing methods are: Broaching cylinder - fine boring cylinder - grinding cylinder. Use rolling method is: Broaching cylinder - fine boring cylinder - rolling cylinder, step three parts, but the contrast on time: grinding cylinder one meter in about 1-2 days, rolling cylinder one meter in about 10-30 minutes. Investment Contrast: grinder or quilted mill (tens of thousands - hundreds of millions), rolling knives (1 thousand - tens of thousands). After rolling, the surface roughness of the hole from the front roller buildings Ra3.2 ~ 6.3 & micro; m is reduced to Ra0.4 ~ 0.8 & micro; surface hardness m, the hole increased by about 30%, the cylinder surface fatigue strength increased by 25% . Cylinder life if only to consider the impact of the cylinder barrel, increased by 2 to 3 times, boring rolling process more grinding efficiency is about 3 times. The above data shows that the rolling process is efficient and can greatly improve the surface quality of the cylinder barrel.

After rolling the cylinder surface with no sharp edge of the tiny, long friction movement will not damage seals or seals, which is particularly important in pneumatic industry.

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