【摘要】：計算機輔助工藝設(shè)計(Computer Aided Process Planning)是連接CAD/CAM的橋梁,是實現(xiàn)CIMS的關(guān)鍵環(huán)節(jié),鑒于CAPP在制造業(yè)中的重要地位,一直成為國內(nèi)外學(xué)者關(guān)注的焦點。工序圖生成系統(tǒng)是CAPP系統(tǒng)的一個重要組成部分,它對于提高工藝設(shè)計的效率和質(zhì)量實現(xiàn)工藝設(shè)計的標(biāo)準(zhǔn)化和提高CAPP系統(tǒng)的實用性具有重要意義,但是工序圖繪制的自動化程度低是CAPP技術(shù)進步的主要瓶頸之一。 目前,工序圖自動生成方法多采用逆序方式,這不僅可以充分利用零件圖信息,相對正序生成方式也更簡單,易于實現(xiàn),但是工序圖生成的自動化程度卻急需提高。軸類零件是較簡單的回轉(zhuǎn)體零件,本課題將以軸類零件為研究對象,綜合運用AutoCAD提供的AutoLISP二次開發(fā)工具,Microsoft Visual Basic可視化編程開發(fā)軟件,數(shù)據(jù)庫技術(shù),計算機輔助工藝尺寸鏈求解技術(shù)等,深入研究CAPP系統(tǒng)中工序圖形化的理論與開發(fā)技術(shù),提出了一種軸類零件的工序圖繪制自動化程度較高的新方法。本課題的研究重點與工作成果如下： (1)零件信息的編碼存儲。首先根據(jù)軸類零件結(jié)構(gòu)的特點,以零件分類編碼的方法為基礎(chǔ),開發(fā)出一種適合本系統(tǒng)的二維零件圖圖元的命名編碼規(guī)則。然后以人機交互的方式獲得特征參數(shù),在繪制參數(shù)化特征的同時,將圖元句柄定義成規(guī)則化的名稱,并將其存儲在AutoLISP語言擅長處理的表結(jié)構(gòu)中,實現(xiàn)了軸類零件的信息存儲,為工序圖繪制模塊提供基礎(chǔ)。 (2)工序圖的自動生成。工序圖的繪制采用基于特征的圖形元素修改方法,根據(jù)在工序圖生成過程中,特征修改遵循的不同原則,把傳統(tǒng)機械加工工藝文件中的工序類型重新分類組合,提出了一種加工工藝信息新的分類方法。按照本文提出的方法將機械加工工藝信息代碼化,生成AutoLISP程序?qū)Ｓ玫耐獠繑?shù)據(jù)文件。然后讀入數(shù)據(jù)文件中的工序代碼,由計算機獨立生成工序簡圖,并保存輸出。最后在系統(tǒng)提供的可視化界面下,從塊庫中選擇標(biāo)注符號,實現(xiàn)定位、夾緊、粗糙度等特殊符號的快速標(biāo)注。 (3)直線工藝尺寸鏈的計算機輔助求解。首先借助工藝尺寸鏈跟蹤圖的表述方法,將工藝尺寸信息轉(zhuǎn)化為多個矩陣數(shù)據(jù)；然后將這些尺寸信息矩陣輸入計算機,由計算機完成結(jié)果尺寸鏈的跟蹤尋找,建立尺寸鏈矩陣；再由計算機進行圖樣公差和工序余量的校核；最后完成各工序尺寸的計算和輸出。
[Abstract]:Computer-aided process planning (Computer Aided Process Planning) is a bridge connecting CAD/CAM and a key link to realize CIMS. In view of the important position of CAPP in manufacturing industry, CAPP has always been the focus of attention of domestic and foreign scholars. Process diagram generation system is an important part of CAPP system. It is of great significance to improve the efficiency and quality of process planning to realize the standardization of process planning and to improve the practicability of CAPP system. However, the low degree of automation in drawing process diagrams is one of the main bottlenecks in the progress of CAPP technology. At present, most of the automatic generation methods of process drawing adopt reverse sequence method, which can not only make full use of part drawing information, but also be simpler and easier to realize than the positive sequence generation method, but the automation degree of process drawing generation needs to be improved urgently. Shaft parts are relatively simple parts of rotary parts. This subject will take shaft parts as research object, and make comprehensive use of AutoLISP secondary development tool, Microsoft Visual Basic provided by AutoCAD to develop software and database technology. In this paper, the theory and development technology of process graphics in CAPP system are deeply studied, and a new method of automatic drawing of shaft parts is proposed. The research focus and work results are as follows: (1) coding and storage of part information. Firstly, according to the characteristics of shaft parts' structure and the method of part classification and coding, a naming coding rule of 2D part drawing elements suitable for this system is developed. Then, the feature parameters are obtained by human-computer interaction. When drawing parameterized features, the reference handle is defined as a regular name, and stored in the table structure which is good at processing in AutoLISP language, and the information storage of shaft parts is realized. Provides the foundation for the process drawing module. (2) automatic generation of process diagram. The drawing of process map is based on feature based graphic element modification method. According to the different principles of feature modification in the process of process diagram generation, the process types in the traditional machining process file are reclassified and combined. A new classification method for processing process information is presented. According to the method proposed in this paper, the machining process information is coded to generate the external data file for AutoLISP program. Then read into the data file process code, computer independent production process diagram, and save the output. Finally, in the visual interface provided by the system, the marking symbols are selected from the block library to realize the fast marking of special symbols such as location, clamping, roughness and so on. (3) Computer-aided solution of linear process dimension chain. Firstly, the process dimension information is transformed into a plurality of matrix data by using the description method of the process dimension chain tracking diagram, and then these dimension information matrices are input into the computer, and the size chain matrix is established by the computer to complete the tracing and searching of the result dimension chain. The design tolerance and process allowance are checked by computer, and the calculation and output of each process size are finished.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH133.2;TH162;TP391.72

【參考文獻】

相關(guān)期刊論文 前10條

1 符純?nèi)A;劉高君;黃茂菲;;表面粗糙度符號標(biāo)注AutoCAD二次開發(fā)的改進[J];電腦知識與技術(shù);2009年36期

2 龔姚騰;王麗麗;胡明振;;CAPP系統(tǒng)工序圖自動生成的研究[J];黑龍江科技信息;2008年05期

3 李大磊;李瑞珍;陳松濤;;基于SolidWorks配置功能的工序圖自動生成方法的研究[J];機床與液壓;2010年22期

4 王彩英;;基于特征的軸類零件參數(shù)化設(shè)計的研究[J];機電產(chǎn)品開發(fā)與創(chuàng)新;2008年05期

5 吳嘉;王媛;;CAPP發(fā)展現(xiàn)狀及展望綜述[J];機電產(chǎn)品開發(fā)與創(chuàng)新;2010年02期

6 范海濤;張樹生;黃瑞;蔡澤;;基于三維工序模型重建的基準(zhǔn)獲取技術(shù)[J];計算機集成制造系統(tǒng);2011年11期

7 姜卓;;計算機輔助工藝設(shè)計(CAPP)技術(shù)的應(yīng)用[J];計算機與數(shù)字工程;2009年05期

8 謝海波,劉相華;CAPP系統(tǒng)關(guān)鍵技術(shù)探討[J];機械設(shè)計與制造;2004年05期

9 楊亞楠;史明華;肖新華;;CAPP的研究現(xiàn)狀及其發(fā)展趨勢[J];機械設(shè)計與制造;2008年07期

10 劉保華;喬愛科;;CAPP系統(tǒng)類型及關(guān)鍵技術(shù)研究[J];機械設(shè)計與制造;2009年08期

相關(guān)博士學(xué)位論文 前1條

1 戈鵬;敏捷化CAPP系統(tǒng)原理、關(guān)鍵技術(shù)與應(yīng)用實踐[D];四川大學(xué);2003年

相關(guān)碩士學(xué)位論文 前4條

1 任韶萱;CAPP系統(tǒng)設(shè)計理論與技術(shù)研究[D];沈陽工業(yè)大學(xué);2005年

2 張偉;基于STEP的CAD/CAPP/CAM集成技術(shù)研究[D];南京航空航天大學(xué);2006年

3 高峰;Pro/ENGINEER平臺下的CAD/CAPP的集成[D];太原理工大學(xué);2006年

4 張云輝;軸類零件圖的計算機識別技術(shù)研究[D];西北工業(yè)大學(xué);2007年

，

本文編號：2408132