The role of the cylinder piston rod processing is large. It is usually rolled to improve the quality of the product, and it is also a moving part with high technical requirements. The piston rod is a continuous part that supports the work of the piston, and is mostly used in the middle of the motion execution parts of the oil cylinder and the cylinder. In relation to other moving parts, the piston rod is a moving part with frequent movements and high technical requirements.
The cylinder piston rod is composed of a cylinder barrel, a piston rod, a cylinder rod, a piston and an end cover. Its surface roughness is required to reach Ra0.4-0.8um, and the requirements for coaxiality and wear resistance are required. They are all harsh. In addition, the machining of slender shafts like cylinder rods has always been a major problem for the staff. Therefore, the technical requirements of the piston rod in the processing are a very important feature of it. It can be said that the quality of the processing technology will simply affect the quality and service life of the product.
The piston rod of the oil cylinder is an important part of the oil cylinder. It is usually made of 45 steel as a solid rod or an empty tube. The piston rod will be eroded by abrasive particles during use, which is very easy to wear. The current domestic ancient process is to hard chrome plating (coating thickness 0.030.05mm) and polishing, and its surface roughness Ra is 0.10.2μm. The plating solution is based on chromic acid and sulfuric acid as the catalyst. The advantages of the process are: the plating solution is stable, easy to operate, the quality of the surface chrome coating is relatively high, and the oil pole is bright, high hardness, and excellent wear resistance.
The processing quality of the piston rod can affect the quality of the product, so pay attention when selecting, the processing of the piston rod can improve the surface erosion resistance, and the piston rod can delay the generation or expansion of fatigue cracks, thus improving the fatigue strength of the cylinder rod. .
Through roll forming, a cold-worked hard layer is formed on the rolled surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the surface of the cylinder rod and avoiding burns caused by grinding. After rolling, the reduction of surface roughness value can improve the matching properties. It is necessary to know that the piston rod can be short or long in the internal part of the reciprocating piston rod, and its reliability is directly related to the performance of the compressor. Therefore, the issue of the invalidity of the piston rod is also a matter of fact. There are many reasons for the invalidity of the piston rod of the chrome-plated rod manufacturer, such as defective processing, unsatisfactory heat treatment and so on.
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