变螺旋铣刀切削力建模及影响因素分析  

RESEARCH ON CUTTING FORCE MODELLING AND INFLUENCE FACTORS FOR END MILLS WITH VARIABLE-HELIX ANGLE

作　　者：靳刚[1,2] 李华[3] 韩建鑫[1,2] 李栋[1,2] 戚厚军[1,2] 

机构地区：[1]天津市高速切削与精密加工重点实验室,天津300222 [2]天津职业技术师范大学机械工程学院,天津300222 [3]天津津航技术物理研究所,天津300300

出　　处：《机械强度》2017年第4期810-815,共6页Journal of Mechanical Strength

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~~

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。Variable helix cutter can reduce the location error of the finished surface,leading to a more accurate machining operation.Considering the geometries of variable pitch and helix angle,and the piecewise continuous regions of the cutting,an analytical model for predicting the cutting force for milling process with variable helix angle cutter is presented.The validation of the proposed model is conducted via some cutting tests.Based on proposed model,the influence of variable helix character on cutting force is studied.Analyses show that cutting force coefficients obtained from the traditional cutting tool could be used to accurately predict the cutting forces of the variable helix cutting tool.The bigger helix angle corresponds to the smaller cutting force and bigger width of phase.The character of variable-helix angle has more significant influence on cutting force when axial depth of cut is larger.

关 键 词：铣削 切削力 变螺旋角 变齿距 

分 类 号：TH161.6[机械工程—机械制造及自动化]