A method for manufacturing a compressor piston

By forming the initial groove through milling and enlarging the hole with a broach, the problem of low machining efficiency of the hinge groove of the compressor piston was solved, realizing efficient and high-precision machining of the hinge hole, reducing costs and improving the stability and installation accuracy of the piston.

CN121535470BActive Publication Date: 2026-05-26NINGBO YONGWEI GROUP
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Patent Information

Application Number
CN202610049256.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-15
Publication Date
2026-05-26
Estimated Expiration
2046-01-15

AI Technical Summary

Technical Problem

In existing technologies, the hinge grooves of compressor pistons require repeated rough and fine grinding to achieve higher precision, resulting in low processing efficiency.

Method used

The initial groove is formed by milling, and the end of the initial groove away from the outer wall is enlarged by broaching to form a hinge hole. The broaching is performed by using the straight arrangement of the broach and the gradually changing shape of the broach teeth to reduce the amount of cutting and wear, and improve the processing efficiency and accuracy.

Benefits of technology

This technology enables efficient and high-precision machining of the hinge holes, reduces the cost of broach manufacturing, extends the service life of the broach, ensures the verticality of the compressor piston and the stability during installation, and avoids wear and noise.

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Abstract

This invention provides a method for manufacturing a compressor piston. The compressor piston includes a hinge hole and a snap-fit ​​position with a width smaller than the hinge hole. The hinge hole is used to connect a transmission component to achieve eccentric rotation of the compressor piston and crankshaft, thereby compressing air. The manufacturing method includes: preparing a piston body; milling the piston body to form an initial groove on the outer wall of the piston body; the initial groove penetrating both end faces of the piston body; using a broach to enlarge the end of the initial groove away from the outer wall to form the hinge hole; the diameter of the hinge hole is larger than the width of the initial groove; and surface treating the piston body to obtain the compressor piston. This invention solves the problem of low processing efficiency caused by the need for repeated rough and fine grinding of the piston hinge surface to achieve higher precision.
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