本文選題：五軸數(shù)控機床 + 加工精度�。� 參考：《電子科技大學》2015年碩士論文

【摘要】：五軸數(shù)控機床在航空薄壁件加工中有著不可替代的作用,針對數(shù)控機床加工精度的檢測,一般用試切標準件的方法。目前廣泛應用的標準件有美國國家航天局提出的NAS979試件、德國的NCG2004試件等,但它們在五軸數(shù)控機床加工精度檢驗上還存在一些問題。成都飛機工業(yè)(集團)有限責任公司提出了一種適用于五軸數(shù)控機床精度檢驗的標準試件——“S”形檢驗試件,現(xiàn)已得到廣泛認可。本文以“S”形檢驗試件為研究對象,研究“S”形檢驗試件的表面輪廓誤差與機床參數(shù)之間的映射關系,提取出評價指標并建立五軸數(shù)控機床加工精度綜合評價模型,并根據(jù)此模型開發(fā)出一套機床加工精度測評系統(tǒng)。主要內容有:1、利用仿真平臺進行單因素仿真,確定了實際加工中對機床加工精度影響較大的機床參數(shù)在“S”形檢驗試件表面的誤差敏感區(qū)域,在敏感區(qū)域提取綜合評價指標并根據(jù)隸屬關系建立分層的評價指標體系。2、根據(jù)評價指標體系的特點,選用序關系分析法求取指標體系各層的指標權重,利用隸屬度函數(shù)對指標實際值進行模糊化,并選取合適的模糊算子進行模糊合成,最終建立基于“S”形檢驗試件的五軸數(shù)控機床加工精度綜合評價模型,使用Matlab軟件編寫綜合評價算法。3、以五軸數(shù)控機床加工精度綜合評價模型為基礎,利用C#、Matlab混合編程技術開發(fā)基于“S”形檢驗試件的五軸數(shù)控機床加工精度綜合評價系統(tǒng)的客戶端,利用ASP.NET語言編寫評價系統(tǒng)的網頁端并以SQL Server為系統(tǒng)數(shù)據(jù)庫。該系統(tǒng)利用“S”形檢驗試件的三坐標測量機測得的表面輪廓數(shù)據(jù),通過綜合評價的方法實現(xiàn)對機床加工精度的評估,能夠分析并提取對機床加工精度影響最大的因素,為五軸數(shù)控機床的調整維護提供依據(jù)。
[Abstract]:Five-axis numerical control machine tool has irreplaceable role in the machining of thin wall parts of aviation. For the inspection of machining accuracy of numerical control machine tool, the method of trial-cutting standard parts is generally used. At present, the widely used standard parts are NAS979 specimen proposed by NASA, NCG2004 specimen of Germany and so on. However, there are still some problems in the machining accuracy test of five-axis NC machine tool. Chengdu aircraft Industry (Group) Co., Ltd. has proposed a standard specimen, "S" shape test piece, which is suitable for the precision test of 5-axis CNC machine tools, which has been widely accepted. In this paper, taking the "S" shape test specimen as the research object, the mapping relationship between the surface contour error of the "S" shape test specimen and the machine tool parameters is studied, the evaluation index is extracted and the comprehensive evaluation model of the machining accuracy of the five-axis NC machine tool is established. According to this model, a machine tool machining accuracy evaluation system is developed. The main contents are: 1. Using the simulation platform for single factor simulation, the error sensitive area of the machine tool parameters which have a great influence on the machining accuracy in the "S" shape inspection specimen surface has been determined. The comprehensive evaluation index was extracted from sensitive area and the hierarchical evaluation index system was established according to the subordinate relationship. According to the characteristics of the evaluation index system, the index weight of each layer of the index system was obtained by using the method of order relation analysis. The actual value of the index is fuzzed by membership function, and the appropriate fuzzy operator is selected for fuzzy synthesis. Finally, a comprehensive evaluation model of machining accuracy of five-axis NC machine tool based on "S" shape test specimen is established. The comprehensive evaluation algorithm. 3 is compiled by Matlab software, based on the comprehensive evaluation model of machining accuracy of five axis NC machine tools. The client of 5-axis NC machine tool machining accuracy comprehensive evaluation system based on "S" shape test sample is developed by using the mixed programming technology of C#C and Matlab. The web page of the evaluation system is compiled with ASP.NET language and the database of the system is SQL Server. The system uses the "S" shape to test the surface contour data of the specimen measured by the CMM, and evaluates the machining accuracy of the machine tool by the method of comprehensive evaluation. The system can analyze and extract the factors that have the greatest influence on the machining accuracy of the machine tool. It provides basis for adjustment and maintenance of five-axis NC machine tool.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG659
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本文編號：1862126