Basic requirements and rolling forming of pneumatic cylinder piston rod

June 27, 2024

Basic requirements and rolling forming of Pneumatic Cylinder piston rod

After the piston rod is formed by rolling, a cold work hardening layer will form on its rolling surface, which can reduce the elastic-plastic deformation of the grinding pair in contact with the surface, thereby improving the wear resistance of the cylinder rod surface and avoiding wear. Burns caused by shaving.

After rolling, the surface roughness value of the piston rod decreases, which can effectively improve the matching performance and reduce the friction damage to the sealing ring or components during the movement of the piston rod, thereby improving the overall service life of the cylinder. Rolling process is an efficient and high-quality process method.

Basic requirements for piston rods

1. The piston rod requires sufficient strength, stiffness, and stability to a certain extent.

2. The piston rod has good wear resistance and higher requirements for machining accuracy and surface roughness.

3. Minimize the impact of stress concentration on the structure as much as possible.

4. Ensure that the connection is secure and avoid loosening.

5. The design of the piston rod structure should facilitate the disassembly and assembly of the piston.

The piston rod is a connecting component that supports the piston to do work, and is mostly used in oil cylinders and cylinder motion execution components. It is a moving component with frequent movement and high technical requirements. Taking a hydraulic cylinder as an example, it consists of several parts: Cylinder Barrel, piston rod (cylinder rod), piston, and end cap. The quality of its processing directly affects the lifespan and reliability of the entire product. The machining requirements for piston rods are high, with a surface roughness requirement of Ra0.4-0.8 μ m, and strict requirements for coaxiality and wear resistance. The basic feature of the oil cylinder rod is the machining of a slender shaft, which is difficult to process and has always troubled the machining personnel.

Pneumatic-Cylinder-304-stainless-steel-Piston-Rod-1.jpg

The piston components include: piston, piston ring, support ring, piston rod, etc. According to the different structural forms, pistons can be divided into cylindrical pistons (longer than diameter), disc pistons (shorter than diameter), differential pistons, combination pistons, and plunger pistons.

The function of the piston rod is to connect the piston and crosshead, transmit the force acting on the piston, and drive the piston to move.

Basic requirements for piston rods:

(1) To have sufficient strength, stiffness, and stability;

(2) Good wear resistance and high machining accuracy and surface roughness requirements;

(3) Minimize the influence of stress concentration on the structure as much as possible;

(4) Ensure reliable connection and prevent loosening;

(5) The design of the piston rod structure should facilitate the disassembly and assembly of the piston.

Pneumatic-Cylinder-CK45-Steel-pneumatic-cylinder-piston-rod-3.jpg

Author:

Mr. WEIYINGSI

E-mail:

info@wyspneumatic.com

Phone/WhatsApp:

18038711802