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Large chip Production Mechanism under the Extreme Load Cutting Conditions

Chinese Journal of Mechanical Engineering 2015年第2期28卷 343-352页

作者： LIU Xianli HE Genghuang YAN Fugang CHENG Yaonan LIU Li Key Lab of National and Local United Engineering for "High-efficiency Cutting & Tools" Harbin University of Science and Technology Xiamen Golden Egret Special Alloy Co. Ltd.

There has existed a great deal of theory researches in term of chip production and chip breaking characteristics under conventional cutting and high speed cutting conditions,however,there isn＇t sufficient research on chip formation mechanism as well as its influence on cutting state regarding large workpieces under extreme load *** paper presents a model of large saw-tooth chip through applying finite element simulation method,which gives a profound analysis about the characteristics of the extreme load cutting as well as morphology and removal of the large *** the meantime,a calculation formula that gives a quantitative description of the saw-tooth level regarding the large chip is established on the basis of cutting experiments on high temperature and high strength *** cutting experiments are carried out by using the scanning electron microscope and super depth of field electron microscope to measure and calculate the large chip produced under different cutting parameters,which can verify the validity of the established *** calculating results show that the large saw-toothed chip is produced under the squeezing action between workpiece and cutting *** the meanwhile,the chip develops a hardened layer where contacts the cutting tool and the saw-tooth of the chip tend to form in transverse *** research creates the theoretical model for large chip and performs the cutting experiments under the extreme load cutting condition,as well as analyzes the production mechanism of the large chip in the macro and micro ***,the proposed research could provide theoretical guidance and technical support in improving productivity and cutting technology research.

关键词： extreme load cutting 2.25Cr-lMo-0.25V saw-tooth chip crimp chip breaking

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FORECAST OF breaking LENGTH OF SIDE CURLING SHORT SPIRAL chipS

引用

Chinese Journal of Mechanical Engineering 1999年第4期12卷 297-302页

作者： Li Zhenjia Qu Guimin Xu Yihong Tao Haihong Department of Mechanical Engineering, Harbin University of Science and Technology 哈尔滨理工大学现代制造技术与刀具开发所黑龙江哈尔滨 150080 哈尔滨理工大学现代制造技术与刀具开发所黑龙江哈尔滨

The theoretical formula for estimating the side curling short spiral chips is simplified. On the basis of experiment, a practical formula for forecasting the chip breaking length is obtained. It is proved by experime... 详细信息

关键词： Side curling Short spiral chip chip breaking

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