Method for machining plastic-metal duplex planetary gears

By first processing metal gears and pressing plastic parts during the new product development stage, and then using a gear hobbing machine to complete the gear processing of the plastic parts, the problems of high cost and long cycle in the existing technology are solved, achieving the effect of low cost and rapid production.

CN119820264BActive Publication Date: 2026-06-19ZHEJIANG FUNDRIVE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG FUNDRIVE TECH CO LTD
Filing Date
2025-02-13
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

When parameters are frequently adjusted during the new product development stage, the processing cost of metal and plastic combination gears is high and the cycle is long, making them particularly unsuitable for single-piece and small-batch production.

Method used

The method of first machining the metal gears and then pressing in the plastic parts involves pre-machining the inner holes and pin holes by turning and milling, and then completing the gear machining of the plastic parts on a gear hobbing machine. This avoids mold development and is suitable for frequent changes during the new product R&D and verification stage.

Benefits of technology

It shortens the processing cycle, reduces production costs, is suitable for single-piece and small-batch production, and increases the flexibility of processing.

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Abstract

The present invention relates to a method for processing plastic and metal double planetary gears. First, the metal gear part is processed. The plastic part is pre-machined by turning and milling to create an inner hole and pin hole that are interference fit with the metal gear. After press fitting, the gear part of the plastic part is processed by using a gear hobbing machine. This method does not require mold opening, has a high degree of freedom, avoids mold development costs, greatly reduces development costs, and shortens the development cycle. It is very suitable for situations where product parameters are frequently changed during the new product R&D and verification stage, and is suitable for small-batch production of single pieces in the early stage.
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