プラスチック歯車の熱間転造仕上げにおける加工機構に関する研究

概要

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In the present study, the deformation mechanism of hot finish rolling of plastic gears is discussed. This mechanism is important for developing a simulation program of this finishing process. For this purpose, indentation tests of rolling rollers were performed so as to show the relationship between the plastic deformation and various conditions. As a result, it was found that the plastic deformation depends strongly on the Hertzian contact width between rollers. In hot finish rolling, the Hertzian contact width between tooth flanks of die wheel and work gear is generally not so large that the plastic deformation causes change in the work tooth form. Hence, it can be concluded that the change in the work tooth form in the hot finish rolling process is not induced by the plastic deformation of the work tooth flank. Thus, we calculated the temperature distribution in the direction of tooth thickness by finite element analysis of heat conduction. According to the result of this calculation, a melted layer of work tooth flank material exists on the tooth surface. Consequently, the change in the work tooth flank in the hot finish rolling process is induced by the flow of the melted layer.
一般社団法人日本機械学会の論文
1993-02-25