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首页> 外文期刊>Russian engineering research >INFLUENCE OF MACHINE-TOOL DESIGN PARAMETERS AND CUTTING REGIMES ON MACHINING ACCURACY
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INFLUENCE OF MACHINE-TOOL DESIGN PARAMETERS AND CUTTING REGIMES ON MACHINING ACCURACY

机译：机床设计参数和切削方式对加工精度的影响

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摘要

The technical characteristics of the spindle assembly (SA) and also the stiffness of the centers of the turning machine or the cylindrical grinding machine have a significant influence on the static and dynamic components of the machining error. The overall error of the diametral dimension of the workpiece - by analogy with the calculation of the dimensional chains by the incomplete interchangeability method - can be expressed by the relation [1] △ =( (△{sub}z){sup}2+(ε{sub}y){sup}2+(△{sub}H){sup}2+3(△{sub}t){sup}2+3(△{sub}T){sup}2 ){sup}(1/2)+ ∑△{sub}φ < δ, (1) where △{sub}z is the error of the diametral dimension (non-circularity) of the part in the given cross section along the axis Z that arises because of the elastic deformations of the components of the technological system (TS) under the influence of the variable cutting forces; ε{sub}y is workpiece mounting error; △{sub}H is the machine adjustment error; △{sub}t is the error that is caused by the tool wear; △{sub}T is the error that is caused by the thermal deformations of the TS; ∑△{sub}φ is the overall shape error that is caused by the geometric errors of the machine elements (primarily the spindle supports), by the workpiece deformations under the influence of the workholding forces and the non-uniform elastic deformations of the TS under the action of the cutting forces; and 5 is the tolerance on the final diametral dimension of the part.
机译：主轴组件（SA）的技术特征以及车床或外圆磨床的中心刚度对加工误差的静态和动态分量都有重要影响。工件直径尺寸的整体误差（类似于通过不完全互换性方法计算尺寸链的误差）可以由以下关系式表示：[1]△=（（△{sub} z）{sup} 2+ （ε{sub} y）{sup} 2+（△{sub} H）{sup} 2 + 3（△{sub} t）{sup} 2 + 3（△{sub} T）{sup} 2） {sup}（1/2）+ ∑△{sub}φ<δ，（1）其中△{sub} z是沿轴的给定横截面中零件的直径尺寸（非圆形）的误差Z是由于在可变切削力的影响下工艺系统（TS）组件的弹性变形而产生的; ε{sub} y是工件安装误差; △{sub} H是机器调整误差; △{sub} t是由工具磨损引起的误差; △{sub} T是由TS的热变形引起的误差; ∑△{sub}φ是由机械元件（主要是主轴支架）的几何误差，在工件夹持力和TS的非均匀弹性变形影响下的工件变形引起的整体形状误差在切削力的作用下; 5是零件最终直径尺寸的公差。

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