PROE在車床夾具三維造型設(shè)計中的研究

19200字           31頁



摘    要


多年來，機械制造過程中把設(shè)計藍圖比喻成工程師的語言。對于機床專用夾具而言，也總是利用眾多視圖的不同投影來描繪。采用標注各種線條和符號繪圖，不僅費時費力，而且一旦理解有誤或形體表現(xiàn)出現(xiàn)偏差，將會影響產(chǎn)品的制造和質(zhì)量。

    采用計算機輔助設(shè)計方法，零件的造型如同車間中加工零件的過程一樣，設(shè)計完成以后，零件就“加工”出來了。這樣不需要很強的空間想象力就可以設(shè)計出產(chǎn)品的真實三維模型，經(jīng)過虛擬裝配，可清楚地檢驗出產(chǎn)品結(jié)構(gòu)的合理性.空間布置是否干涉等問題。造型結(jié)束后，將設(shè)計模型投影到二維圖紙空間，就可自動生成工程圖紙的三視圖，軸側(cè)圖，剖視圖等。大大方便了設(shè)計過程，形象直觀易于接受，從而達到更快地設(shè)計機械產(chǎn)品。

本課題在探討機床專用夾具的基本知識和機械制造工藝學基本理論的同時，研究如何利用PRO/ENGINEER設(shè)計專用夾具，以及如何利用PRO/ENGINEER對專用夾具進行三維建模，再進一步得到二維工程圖,形成專用夾具計算機輔助設(shè)計系統(tǒng)。




關(guān)鍵字:模型,夾具,工藝學,工程圖,三維建模


 


ABSTRACT


  For long years, we have considered the design drawing as the engineers’ language in the mechanical manufacture process. For the machine tool jigs, we always use the views of different projections to represent them. It is a waste of time to use the method of labeling various lines and symbol drawing, furthermore, once misunderstanding or appearing deviation of body representing, the product’s quality and manufacture will be effected.

  Using CAD method, the modeling of the part is the same as the process of machining part, the part will be machined once design accomplished. So it is possible to design the real 3-D model of the part without strong space imagination, and it is also possible to check out the rationality of the part’s structure and the problem of spatial arrangement interference and so on through virtual assembly. After model accomplished, the engineering drawing, axonometric drawing, and the cutaway view and so on will be created automatically by projecting the model onto 2-D paper space. It makes designing process very convenient, intuitive, acceptant, thus it is faster to design mechanical product.

  In this paper, we will discuss the basic knowledge of the machine tool jig and the mechanical technology, at the same time, researching how to design specialized jigs and how to carry through three-dimensional modeling of specialized jig with the help of PRO/ENGINEER, so as to obtaining 2-D engineering drawing, forming the CAD system of the specialized jig.




Keywords: model, jig, technology, engineering drawing, 3-Dmodeling


 




目   錄


中文摘要 Ⅰ

ABSTRACT Ⅱ

1緒論 1

1.1 引言  1

  1.2 PRO/ENGNIEER軟件模塊簡介 1

1.3 本論文的研究目的、意義 3

2機械加工工藝規(guī)程設(shè)計 5

2.1分析研究被加工零件及零件圖的繪制 5

       2.1.1  明確任務(wù)、分析零件 5

 2.1.2 零件工藝分析、繪制零件圖 6

2.2選擇毛坯，確定毛坯尺寸，設(shè)計毛坯圖 7

2.2.1 選擇毛坯 7

2.2.2 確定機械加工余量、毛坯尺寸和公差 8

 2.2.3 確定機械加工余量 8

2.2.4 確定毛坯尺寸 10

2.2.5 確定毛坯尺寸公差 10

2.2.6 繪制毛坯圖 11

2.3 選擇加工方法、制定工藝路線 11

2.3.1 定位基準的選擇 11

 2.3.2 零件表面加工方法的選擇 11

2.3.3 制定工藝路線 12

2.4工序設(shè)計 12

2.4.1 選擇加工設(shè)備與工藝裝備 12

2.4.2 確定工序尺寸 14

2.5 確定切削用量 14

2.5.1 切削用量的選擇原則與步驟 14

  2.5.2 切削用量的選擇方法 15

2.5.3 零件各工序切削用量的確定 15

3 夾具設(shè)計 19

3.1 夾具設(shè)計的基本要求 19

 

3.2 工序簡圖的繪制 19

3.3 車床專用夾具設(shè)計 20

4 結(jié)論 26

4.1 完成本次設(shè)計首先需要具備的技能 26

4.2 論文研究成果 26

 4.3 運用前景與展望 26

參考文獻 27