变螺旋铣刀切削力建模及影响因素分析

发布时间：2018-03-16 15:35

本文选题：铣削　切入点：切削力　出处：《机械强度》2017年04期 　论文类型：期刊论文

【摘要】：变螺旋铣刀可降低加工过程表面位置误差,进而提高加工精度。考虑变螺旋铣刀的变端齿距和变螺旋角几何特性及刀齿的切削过程分段特性,构建了变螺旋铣刀每齿进给量时变模型和切削力预测解析模型。开展了铣削实验,验证了模型的有效性和可靠性。基于理论模型,进行了变螺旋铣刀切削力影响因素分析,结果表明:常规铣刀实验所得的切削力系数,可用于变螺旋铣刀切削过程切削力预测;铣刀变螺旋角特性可显著影响切削力,刀齿螺旋角度越大,其切削力峰值越小,而每齿的切削力相位宽度随着螺旋角的增大而增大;铣刀变螺旋角特性对切削力的影响在大轴向切削深度时更为显著。
[Abstract]:The variable helical milling cutter can reduce the surface position error of machining process and improve the machining accuracy. Considering the geometric characteristics of variable end gear pitch and helical angle of variable helical milling cutter and the segmental characteristic of cutter tooth cutting process, The time-varying model of feed rate per tooth and the analytical model of cutting force prediction are constructed. Milling experiments are carried out to verify the validity and reliability of the model. Based on the theoretical model, the factors affecting the cutting force of variable helical milling cutter are analyzed. The results show that the cutting force coefficient obtained from the conventional milling cutter experiment can be used to predict the cutting force in the cutting process of the variable helical milling cutter, and the variable helical angle characteristic of the milling cutter can significantly affect the cutting force. The larger the helical angle of the cutter is, the smaller the peak value of the cutting force is. The cutting force phase width of each tooth increases with the increase of helical angle, and the influence of the variable helical angle of milling cutter on the cutting force is more obvious when the cutting depth is large.
【作者单位】：天津市高速切削与精密加工重点实验室;天津职业技术师范大学机械工程学院;天津津航技术物理研究所;
【基金】：国家自然科学基金(51405343) 天津市自然基金(15JCQNJC05000) 天津市科技重大专项(15ZXZNGX00220) 天津市高等学校创新团队培养计划(TD12-5043) 天津市高校中青年骨干创新人才培养计划(KC14-07)资助~~
【分类号】：TG54

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