The invention discloses a screw angle design method of a milling cutter based on the minimum cutting force peak value, which is used for solving the technical problem of the design method of the spiral angle of the existing milling cutter and the poor accuracy of the screw angle. The technical scheme is to calculate the cutting angle and the cutting angle according to the milling method and the radial cutting depth first. According to the calibrated radial and tangential milling force coefficients, the tangential values of the ratio of radial and tangential milling force coefficients are calculated. Then, according to the tangent value of the cut, cut angle and the ratio of the cutting force coefficient, the condition of the selected cutter tooth number is satisfied. When the number of cutter teeth meets the criteria, the helical angle of the minimum milling force peak value is calculated according to the axial cutting depth, the radius of milling cutter and the number of cutter teeth. Compared with the background technology, the helical angle of the milling cutter under the minimum cutting force peak condition can be obtained without experimental or finite element simulation, and the operation is simple and the accuracy is high.
【技术实现步骤摘要】
基于最小切削力峰值的铣刀螺旋角设计方法
本专利技术涉及一种铣刀螺旋角设计方法,特别涉及一种基于最小切削力峰值的铣刀螺旋角设计方法。
技术介绍
切削加工中,低切削力对减小切削变形、降低刀具磨损及延长刀具寿命起着至关重要的作用。通常,降低切削力的做法是选择更为保守的工艺参数,但这将以牺牲加工效率作为代价。因此,优化铣刀几何参数以降低铣削力成为一种替代方法,而螺旋角就是其中一个重要几何参数。得到不同切削参数下铣削力峰值最低所对应最优螺旋角具有重要意义。文献1“A.Hosokawa,N.Hirose,T.Ueda,T.Furumoto,High-qualitymachiningofCFRPwithhighhelixendmill,AnnalsoftheCIRP63(2014)89–92.”公开了一种适用于碳纤维增强塑料高质量加工的大螺旋角设计方法。Hosokawa等人根据实验结果指出较大的铣刀螺旋角可显著降低切向和法向切削力。他们只是定性分析大螺旋角下铣削力的变化规律,并未提出不同切削参数下铣刀螺旋角选取策略。文献2“A.H.Li,J.Zhao,Z.Q.Pei,N.B.Zhu,Simulation-basedsolidcarbideendmilldesignandgeometryoptimization,InternationalJournalofAdvancedManufacturingTechnology71(2014)1889–1900.”公开了一种基于有限元仿真来选取立铣刀螺旋角的方法。通过有限元仿真分析6种不同螺旋角下的铣削力,Li等人发现铣削力合力的峰 ...
【技术保护点】
一种基于最小切削力峰值的铣刀螺旋角设计方法,其特征在于包括以下步骤:步骤一、根据所选铣削方式、径向切削深度和铣刀半径计算切入角和切出角的大小;顺铣时切入、切出角采用下式计算得到:
【技术特征摘要】
1.一种基于最小切削力峰值的铣刀螺旋角设计方法,其特征在于包括以下步骤:步骤一、根据所选铣削方式、径向切削深度和铣刀半径计算切入角和切出角的大小;顺铣时切入、切出角采用下式计算得到:φex=π逆铣时切入、切出角采用下式计算得到:φst=0式中,φst是切入角,φex是切出角,R是铣刀半径,ae是径向切削深度;步骤二、采用下式计算切削力系数:
【专利技术属性】
技术研发人员:张卫红,万敏,冯佳,马颖超,
申请(专利权)人:西北工业大学,
类型:发明
国别省市:陕西,61
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