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五轴加工中心的数控编程后置处理研究 摘要: 通常,直接利用通用后置处理器生成的 NC 代码与用户使用的数控机床和系统的要求不符,不能生成正确的加工程序,导致数控加工不能安全、可靠地进行,并且通用后置处理器不能输出机床数控系统所特有的辅助功能,使得数控机床特性功能的利用受到影响。
本课题针对MIKRON UCP 600 Vario型五轴加工中心及配置的Heidenhain iTNC530数控系统进行了专用后置处理的研究,开发了后置处理程序,该程序能够根据刀位源文件生成数控加工程序,且无需二次更改,就可以实现五轴联动数控加工。
Heidenhain iTNC 530数控系统除了具备ISO标准的辅助功能以外,还有其它特有的辅助功能,针对辅助功能和五坐标数控加工机床的特殊性,利用UG/PostBuilder后置处理器,实现了模态辅助功能指令M126、M128的输出和非模态辅助功能指令循环32的输出。
通过用户自定义功能,以Tcl语言为开发语言,实现了在生成NC程序的同时输出总加工时间、每道工序的加工时间和刀具信息。
将专用后置处理程序与UG集成,实现了在UG中调用后置处理程序自动生成数控加工代码。
关键词:五坐标加工 数控编程 后置处理 加工仿真 整体叶轮 Study on Post Processing for NCProgramming of Five-axis Machining Center Abstract:Usually the NC code generated by the general post processordoesnt match with the request of the numerical control machine and the its system.Thus it cannot produce the correct processing procedure results in the numericalcontrol processing can not be carried out with safety and reliabitlity furthermore thegeneral post processor cannot output the unique auxiliary function of the machinenumerical control system which causes the characteristics and functions of thenumerical control machine to be used efficaciously or correctly. Aimed to MIKRON UCP 600Vario five-axis machining center and HeidenhainiTNC 530 numerical control system the special-purpose post-processing was studiedand the post-processing programme was develope in this paper. This programme canproduce NC processing procedure according to the cutter location source file and it isnot necessary to conduct second alteration then it can realize five-axis simultaneouslycontrolled NC processing. Besides the ISO auxiliary function HEIDENHAIN iTNC 530 numerical controlsystem also has many other unique auxiliary functions. Aim to these functions and theparticularity of five-axis NC machining and post-processing UG/Post Builder weconducted the output of the modality assistance function instruction M126 the M128and the output of the non-modality assistance function instruction circulation 32.Through the user-defined functions taking the Tcl as the development language thesubject has realized to output the total process time and each working procedureprocess time and tool-information while produces the NC procedure. The integrationof special-purpose post-processing procedure and the UG has attained automaticallyto produce the numerical control processing code by transferring the post-processingprocedure in UG.Keywords : Five-axis machining NC programming Post processingMachining simulation Integral impeller 目 录第一章 绪论 ................................................................................................