基于UG變速齒輪箱體數(shù)控加工生產(chǎn)線設計

摘  要

    加工中心簡稱CNC。是一種由機械設備與數(shù)控系統(tǒng)組成的使用于加工復雜形狀工件的高效率自動化機床。加工中心的突出特點為加工工序集中和能夠實現(xiàn)自動換刀，對于形狀復雜、精度要求較高和要求換刀頻繁的零件的加工能夠提高生產(chǎn)效率、縮短生產(chǎn)周期以獲得較好的經(jīng)濟效果。

本次設計針對的零件為三星齒輪箱體，形狀復雜、有一定的精度要求并且加工工序較多，因而選擇在加工中心上加工很合適。

設計首先用UG軟件繪制零件圖、毛坯圖，然后對零件進行分析，確定合適的加工工序，根據(jù)工序選擇相應的定位基準，制定加工工藝，選擇切削用量并計算基本工時，用AutoCAD繪制加工工藝綜合卡，用UG導出其中一道工序的數(shù)控加工G代碼，選擇兩道加工工序設計夾具并用CAD繪制夾具裝配圖。

    關鍵詞：三星齒輪箱體；工藝；工序；加工中心；夾具

UG-based Design of CNC Machining Production Line of the Gear Box 

ABSTRACT

    Processing center referred to as CNC. Composed by mechanical equipment and numerical control systems used for processing complex shape of workpiece, CNC is a kind of high efficiency automation machine tools. Processing operations focused and able to achieve automatic tool change is a prominent characteristic of the machining center. When used to process workpieces which are of complex shape, of high accuracy and require for frequent tool change, it can improve production efficiency, shorten the production cycle in order to obtain better economic effects.

This design is for part——Norton gear box who have complex shape, certain degree of accuracy and more processing process.So it is relatively appropriate to process in the processing center.

The first step of this design is to use UG to draw the part drawing, blank drawing and process work preface diagram. Then analysing the part so as to determine appropriate manufacturing procedure, using the UG software export procedure of NC machining process, selecting the appropriate location basis to develop a process route, choosing processing equipment and tools, fixtures, measuring, and calculating each procedure of the basic working hours, drawing processing process card. Finalize the fixture design of two process and complete the fixture drawings with CAD. 

KEY WORD: Norton gear box；technology；process；processing center;

           fixture

目錄

前  言 iv

第 1 章 零件分析 1

1.1. 零件作用分析 1

1.2. 零件工藝分析 2

第 2 章 確定毛坯尺寸 3

2.1. 確定毛坯尺寸 3

第 3 章 工藝過程設計 4

3.1. 定位基準的選擇 4

3.2. 制定工藝路線 4

3.3. 選擇加工設備及刀具 6

3.4. 加工工序設計 12

第 4 章 三星齒輪箱體夾具設計 30

4.1. 夾具設計的相關要求 30

4.2. 定位夾緊方案的確定 30

4.3. 切削力及夾緊力的分析 32

4.4. 定位誤差分析 37

第 5 章 銑削下底面G代碼 39

第 6 章 結  論 45

參考文獻 46

致  謝 47