Overview and Tips for Using Piston Rods

The piston rod is a connecting component that supports the piston to do work, and is mostly used in the moving parts of air cylinders and oil cylinders. It is a frequently moving and highly skilled moving component. The processing quality directly affects the life and reliability of the entire product. The machining requirements for piston rod are high, and the requirements for phase coaxiality and wear resistance are strict.

Tips for using piston rods:

The piston rod is a connecting component that supports the piston to do work, and is generally used for the cylinder and cylinder motion execution part. It is a moving component that requires high frequency and skill requirements. Taking the hydraulic cylinder as an example, it consists of a cylinder block, a piston rod (cylinder rod), a piston, and an end cap. The quality of its processing directly affects the life and reliability of the entire product. The piston rod requires high machining requirements, high surface roughness, and strict coaxiality and wear resistance. The basic feature of the oil cylinder rod is the processing of the slender shaft, which is difficult to process and has always troubled us.

Using rolling processing, due to the residual compressive stress in the outer surface layer, it helps to seal small cracks on the outer surface and hinder the expansion of erosion. Then, improving the external corrosion resistance can delay the generation or expansion of fatigue cracks, thereby improving the fatigue strength of the cylinder rod. Through rolling forming, a cold work hardening layer is formed on the rolling surface, reducing the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the outer surface of the cylinder rod, and jointly avoiding burns caused by grinding. After rolling, reducing the surface roughness value can improve the fitting performance. Together, it reduces the damage to sealing rings or seals caused by the movement of the cylinder rod and piston, and improves the overall service life of the cylinder.

According to the selection of piston rod materials, stress and skill requirements, processing and heat treatment, the rules for the interaction between mechanical properties and matrix structure, and the adjustment of treatment processes, a different method from the subsequent processes is proposed, using sub temperature quenching to ensure quality and reduce consumption. Analyzed the parts, process standard design, and fixture design in machining. The entire process of manufacturing the piston rod assembly weldment is described in detail, especially in the process specification design. Using the mastered mechanical manufacturing theory and calculation formulas, the manufacturing form is determined, the base surface is selected, the process route is formulated, the machining allowance, process dimensions, and blank dimensions are determined, and the cutting amount and basic working hours are determined.