Refrigerator compressor piston pin hole combination processing method

Abstract

The invention provides a refrigerator compressor piston pin hole combination processing method. A combination processing cutter is adopted, and the method comprises a processing step. The combination processing cutter consists of a flange cutter handle assembly, a sliding sleeve assembly, a sliding cutter rod shaft assembly and a bearing assembly. The processing step comprises the following processes that the first roll finishing is sequentially carried out on pin holes, the chamfering is carried out at a connecting part of a piston pin hole and an inner cavity, and the piston pin hole is subjected to the roll finishing again. The combination processing method has the advantages that the production rhythm is reduced, the oil tank processing quality is improved, and the use range of the cutter is expanded. Compared with the single-cutter-blade processing and cutting, the processing by the combined cutter has the advantages that the processing efficiency is improved by 20 percent, and the production and work efficiency is improved by 18.8 percent, so wide market prospects are realized.

Description

technical field [0001] The invention relates to the field of piston processing of refrigeration compressors, in particular to a combined processing method for piston pin holes of refrigerator compressors. Background technique [0002] Refrigerator compressor pump body structure is a typical piston linkage mechanism, such as figure 1 As shown, the piston pin plays an important role in connecting the piston and the connecting rod, and the piston pin hole is the matching pair for the piston and the piston pin. The accuracy of the matching pair directly affects the flexibility between the piston and the connecting rod, thus determining the pump body efficiency of the compressor to a certain extent. Piston pin hole processing is an important part of piston processing. It has high processing precision and many processes. The processes generally include: chamfering the outer round hole corner, drilling, reaming, boring, rolling, and internal chamfering. [0003] In actual product...

AI Technical Summary

Problems solved by technology

[0004] The above method of machining the inner chamfer of the piston pin hole has the following disadvantages: 1. The inner cavity of the piston is small. When the piston is held in hand, the milling cutter enters the inner cavity and reaches the inner chamfering position, and the milling cutter is easy to touch the inner cavity. Other parts of the cavity, causing damage to the piston

2. When the internal chamfering of the piston is processed (that is, the milling cutter contacts and processes the connection between the piston pin hole and the piston inner cavity), the milling cutter has a large force on the piston, and the piston is small in size. If the operator is a little careless, the piston will It may slip and even cause danger to the operator

As a result, it may cause problems such as chamfering one side, excessive chamfering, different chamfering sizes, or even unprocessed chamfering.

4. Since the internal chamfering process is completely manual, it takes a lot of time

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