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

The function of stainless steel piston rod is mainly used for: guide column (hydraulic pneumatic, engineering machinery, piston rod for automotive manufacturing, plastic machinery), axis (roller shaft for packaging machinery, printing machinery, textile machinery, conveying machinery) linear optical axis (linear motion).
Product production generally adopts rolling processing, which can leave residual compressive stress on the surface layer, which can help seal small surface cracks and hinder the expansion of erosion. Because of rolling forming, a cold work hardening layer is formed on the rolling surface, which can reduce the elastic and plastic deformation of the contact surface of the grinding pair, improve the wear resistance of the cylinder rod surface, and avoid burns caused by grinding. After rolling, the surface is not rough, reducing the friction damage of the stainless steel piston rod during movement, thus increasing the overall service life of the machine.
Rolling process is a highly technical measure. Before rolling, the surface roughness of the oil cylinder rod is Ra3.2-6.3um, while after rolling, it decreases to Ra0.4-0.8um. The surface hardness and fatigue strength of the oil cylinder rod increase by 30% and 25%, respectively. The service life of the oil cylinder has also increased by 2-3 times, and the efficiency of the rolling process has increased by about 15 times compared to the original process. The above data indicates that the rolling process is efficient and can greatly improve the surface quality of the cylinder rod.