Mechanical processing technology specification for piston rod parts

Mechanical processing technology specification for piston rod parts

1、 Raw material selection

The raw material for piston rods is generally high-quality steel, which varies depending on the usage environment and the load it needs to withstand. Common materials include 45 steel, 40Cr, 35CrMo, etc. When selecting materials, the first thing to ensure is that the material meets the standards and there are no obvious defects such as cracks or pores to ensure the quality of subsequent processing.

2、 Turning machining

The piston rod is usually formed by turning, and the following aspects need to be noted during the turning process:

1. Determine the turning method: The piston rod usually adopts two methods: external cutting and end face machining. When performing circular cutting, it is necessary to determine parameters such as cutting speed, feed rate, and cutting depth of the lathe to ensure machining quality and efficiency.

2. Choose the appropriate turning tool: Hard alloy turning tools are usually used for turning piston rods, and the selection should be based on the hardness of the material and the processing requirements.

3. Pay attention to the use of cutting fluid: Using an appropriate amount of cutting fluid can effectively reduce cutting temperature, decrease error rate, and extend tool life.

4. Make good use of tool grinding: Excessive wear of the tool can lead to a decrease in machining quality. Timely tool grinding is an important measure to ensure machining accuracy and efficiency.

3、 Grinding processing

The grinding process of piston rods is to improve surface quality and dimensional accuracy, and there are two common methods: grinding wheel grinding and center grinding. When grinding, attention should be paid to the following aspects:

1. Determine the grinding method: Select grinding wheel grinding or center grinding according to the material and processing requirements.

2. Application of grinding fluid: Grinding fluid is required during grinding, which can maintain a stable temperature, improve grinding efficiency, and improve the quality of the machined surface.

3. Adjustment of grinding machine: For both wheel grinding and center grinding, it is necessary to adjust the parameters such as the speed and feed rate of the grinding machine to achieve the best grinding effect.

4、 Heat treatment

Heat treatment is an essential step in the machining process of piston rods. The hardness and strength of the piston rod can be improved through heat treatment, and common methods include quenching, tempering, and tempering. Attention should be paid to the following aspects:

1. Determine the heat treatment method: Select the appropriate heat treatment method based on the usage environment and mechanical performance requirements of the piston rod.

2. Control heat treatment parameters: Control heat treatment temperature, cooling rate, insulation time and other parameters to achieve the desired heat treatment effect.

3. Pay attention to quality inspection after heat treatment: The piston rod after heat treatment needs to undergo quality inspection, including testing of dimensional accuracy, hardness, and other indicators, to ensure product quality.

5、 Summary

Through the introduction of the machining process of piston rods, it can be seen that the machining of piston rods requires multiple stages, and each stage requires strict control of machining parameters to ensure product quality. If you are a novice in piston rod machining, the guide provided in this article can help you quickly understand the machining process and techniques, thereby improving machining efficiency and quality.