五轴加工理论与典型零件工艺方案.pdfVIP

ＣＡＭ专家UG８.5五轴加工经典案例

五轴理论讲解机床结构工作原理典型零件的工艺方案

第一节五轴机床结构特点与工作原理

1.五轴的定义:一台机至少有5个坐标，分别为3个直线坐标和两

个旋转坐标

2.五轴加工特点：

1.三轴加工机床无法加工到的或需要装夹过长2.提高自由空间曲面的

精度、质量和效率

2.五轴与三轴的区别;五轴区别与三轴多两个旋转轴，五轴坐标的确

立及其代码的表示

Z轴的确定：机床主轴轴线方向或者装夹工件的工作台垂直方向为Z

轴

X轴的确定：与工件安装面平行的水平面或者在水平面内选择垂直与

工件的旋转轴线的方向为X轴，远离主轴轴线的方向为正方向

3.直线坐标X轴Y轴Z轴旋转坐标A轴、B轴、C轴

A轴：绕X轴旋转为A轴

B轴：绕Y轴旋转为B轴

C轴：绕Z轴旋转为C轴

+A+B、+A+C、+B+C三种形式五轴

4.五轴按主轴位置关系分为两大类：卧式、立式

5.五轴按旋转主轴和直线的关系来判定，五轴联动的结构形式：

CAMExpertUG8.5ClassicCaseofFive-Axis

Processing

Five-axistheoryexnationmachinetoolstructureworkingprinciple

processschemeoftypicalparts

Section1Structuralcharacteristicsandworking

principleoffive-axismachinetool

1.Definitionoffiveaxes:Thereareatleast5coordinatesonamachinetool,3straight

linecoordinatesandtworotarycoordinatesrespectively

2.Five-axismachining

characteristics：

1.Thethree-axismachiningmachinetoolcannotbeprocessedorneedstobeclamped

toolong2.Improvetheaccuracy,qualityandefficiencyofthefreespacesurface

2.Thedifferenceweenfiveaxesandthreeaxes;thedifferenceweenfiveaxes

andthreeaxeshastwomorerotationaxes,andthecoordinatesofthefiveaxesare

establishedandtheircoderepresentations.

DeterminationofZaxis:Themachinetoolspindleaxisdirectionorthevertical

directionoftheworkbenchforclampingworkpieceisZaxis

DeterminationofX-axis:Thehorizontalneparalleltotheworkpieceinstallation

surfaceorinthehorizontalne,thedirectionperpendiculartotheaxisofrotationof

theworkpieceistheX-axis,andthedirectionawayfromtheaxisofthemainshaftist

hepositivedirection.

3.LinearcoordinatesXaxisYaxisZaxisRotaryco