成人抖抈app免费版,九月婷婷丁香,操逼无码免费观看,自拍偷拍欧美色图图片区

Precision piston rods are commonly used in hydraulic and pneumatic industries, as well as in automotive manufacturing and engineering machinery. Rolling processing technology is generally chosen because it will leave a lot of compressive stress on the surface, which can effectively help seal the cracks that appear on the product surface.
After rolling and forming the precision piston rod, a cold worked hardened layer will be formed on the surface after rolling, reducing contact with the surface due to grinding and reducing plastic and elastic deformation, effectively improving the wear resistance of the product surface. It can also avoid burns caused by grinding of the product. After rolling treatment, the roughness of the entire surface will be reduced, and the properties can be appropriately improved. It can also reduce friction damage to the sealing ring and sealing components, but the service life of the oil cylinder has significantly increased.
Rolling process is a highly efficient and high-quality process measure. If a precision piston rod with a diameter of 16mm is used as a case study for analysis, after rolling treatment, significant changes can occur in the surface roughness.