The rational rough and technological parameter of profile modified gear is gained by analysis and optimizing of forming, and the preliminary shaping size of product is defined.

根据摩托车档位齿轮的产品特点，进行成型工艺分析优化，获得合理的产品精化毛坯，拔模斜度等参数，获取产品的预成型毛坯尺寸。

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Preliminary probe into practical teaching system about material shaping and controlling engineering specialty is discussed through combining with current situation about universities in our country.

分析了材料成型与控制工程专业实践教学的现状，提出了构建新的专业实践教学体系的设想。

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