Processing technology and performance of precision piston rod

The 316 Stainless Steel Precision Piston Rod is processed by rolling, and the residual compressive stress on the surface is conducive to sealing the micro-cracks on the surface and hinders the erosion expansion. Thereby, the corrosion resistance of the surface is improved, and the fatigue crack of the piston rod is delayed or enlarged, thereby improving the fatigue strength of the cylinder rod.

The precision piston rod is formed by rolling to form a chilled layer on the rolling surface, which reduces the elastic-plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the surface of the cylindrical rod and avoiding burns caused by grinding. After rolling, the reduction of surface roughness can improve the matching performance. At the same time, the friction damage of the sealing ring or the seal during the movement of the cylinder rod and the piston is reduced, and the overall service life of the cylinder is improved. The rolling process is a high-efficiency and high-quality process measure. The rolling head of the seamless steel pipe was cut with a diameter mirror, and the rolling effect was proved.

Precision piston rods work by reciprocating. In order to improve the service life of the piston rod and reduce the wear halo of the piston rod, alloy structural steel is selected as the blank. Piston rods are produced in small batches. In order to improve the output power, it is advisable to use free forging to make billets. When selecting the positioning datum, in order to ensure the coaxiality tolerance of the parts and the accuracy of the position of each part, all machining processes are located in the two center holes, which conforms to the principle of datum unity. When grinding a cylindrical surface, the workpiece is prone to tooling, elastic deformation and affects the accuracy of the piston rod.

Therefore, the center hole should be ground to ensure that the center hole is clean, the tightness between the center hole and the top should be appropriate, and good lubrication should be ensured. In order to ensure the stability of the machining accuracy of the precision piston rod produced by the piston rod manufacturer, manual straightening is not allowed during the entire machining process.

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