Modeling and experimental research on milling force of splicing die considering rear face wear and slit impact

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (17) : 284-291.

YUE Caixu DOU Jianbiao JIANG Nan GAO Haining ZHU Lei LIU Xianli

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Abstract

In order to solve the problem of the change of milling force caused by tool wear in the milling process of splicing die, a modeling method of milling force considering the rear face wear of ball end cutter was put forward. According to the different hardness of the material, the cutting thickness of each cutting cycle was established as a function of the cutting angle, and the shear force model under different cutting angle was obtained. At the same time, the functional relationship between the friction effect stress of the rear face and the wear amount of the rear face was established, and the friction effect stress model under different cutting angles was obtained. Finally, the impact force model was obtained by introducing the single-degree-of-freedom italic collision model, using the equivalent spring damping method and Hopkinson experiment. Combined with the shear force model, friction stress model and impact force model, the milling force model at the splicing slit considering rear face wear was obtained. finally, the milling force experiment of multi-hardness hardened steel was carried out. It was shown by the experimental results that the predicted milling force amplitude and variation trend are in good agreement with the experimental values, which verifies the effectiveness of the milling force modeling method, and has a certain theoretical guiding significance for the optimization of milling process of splicing die.

Key words

Milling force modeling / tool wear / Multi-hardness splicing / Hardened steel die / Slit impact

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YUE Caixu DOU Jianbiao JIANG Nan GAO Haining ZHU Lei LIU Xianli . Modeling and experimental research on milling force of splicing die considering rear face wear and slit impact[J]. Journal of Vibration and Shock, 2019, 38(17): 284-291

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