To solve the deformation and accuracy problem in the inner hole machining, we utilized stitching and partition process.
再采用粘结分离工艺，简单、巧妙地解决了叶片分离加工中叶片易变形、内孔精度易丧失的问题。
Simple, make a process hole in the opposite direction of this inner surface, process with milling cutter. Fetch back the process hole after procession was finished.
简单，在该内表面的对面开加工孔，然后用铣刀加工。加工完之后，把加工孔补上。
The cold precision forging process of two kinds of inner gear with typical structure (hole-through inner gear & non-hole-through inner gear) is proposed.
提出了两类典型结构内齿轮（贯通内齿轮和非贯通内齿轮）的冷精锻成形工艺方案。
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