汽車變速箱體的加工工藝及銑上平面、銑頂面夾具設(shè)計【優(yōu)秀課程畢業(yè)設(shè)計含3張CAD圖紙+帶開題報告+文獻(xiàn)綜述+外文翻譯】

汽車變速箱箱體機械加工工藝及銑上平面、銑頂面夾具設(shè)計

摘  要

本設(shè)計是圍繞汽車變速器箱體加工工藝和專用夾具設(shè)計而進(jìn)行的，變速器箱體主要加工是銑面、鉆鏜孔和攻螺紋。變速器箱體的左右端面和上下表面的粗糙度要求比較高，面的粗糙度相對孔的加工精度更容易達(dá)到要求。而孔的分布位置比較具有規(guī)律，基本在兩條軸線內(nèi)，需要保證的主要是孔的垂直度和圓跳動及內(nèi)孔面的粗糙度。本設(shè)計的工藝規(guī)程遵循先面后孔的設(shè)計原則，并將面的粗、精加工與孔的粗、精加工明確分開，確?？椎某叽缇群透鞣N要求。粗基準(zhǔn)和精基準(zhǔn)選擇的都是變速箱的下部底面。加工工序方面首先安排以變速器箱體的下部底面為定位基準(zhǔn)對上表面進(jìn)行加工，再以下部端面與箱體側(cè)部表面對軸承孔加工，裝夾方式則選用人工上緊的螺紋釘夾具，該夾具經(jīng)過專門設(shè)計，能保證可靠的夾緊。

本設(shè)計是適用于中批量生產(chǎn)，要求在確保加工質(zhì)量的條件下，盡可能降低生產(chǎn)工時，提高生產(chǎn)效率，降低生產(chǎn)成本，也是現(xiàn)今機加工產(chǎn)業(yè)的主要發(fā)展方向。因為本設(shè)計是面向?qū)嶋H生產(chǎn)，對變速箱體零件圖紙進(jìn)行分析，及對變速箱的結(jié)構(gòu)及功用多方面考慮，確保能保證工藝過程符合生產(chǎn)需要，并能保證尺寸要求和技術(shù)要求，并對設(shè)計的箱體面、軸承孔加工的夾具進(jìn)行精度和誤差分析，確保夾具能應(yīng)用于實際生產(chǎn)。

關(guān)鍵詞：變速箱箱體 加工工藝 定位 夾緊 夾具設(shè)計

Abstract

This design is about the automobile gearbox which is design of processing technology and special fixture. The main processing direction of gear box includes milling surface, drilling hole and tapping thread. The roughness of the left and right end faces of the transmission case and the upper and lower surfaces require a high degree of roughness. The roughness of the surface is easier to meet the requirement of the machining accuracy of the hole. The distribution of holes has a regular pattern, distributed in two axes. The main guarantee is the verticality of the hole and the runout of the circle and the roughness of the inner hole surface. The design process of the actual practice, production and processing oriented, combining theoretical knowledge, Follow the design principle of the front face and the rear hole. The surface roughing and finishing are clearly separated from the roughing and finishing of the hole. Ensure dimensional accuracy and various requirements of the hole. Both the rough and the fine reference are chosen for the lower underside of the gearbox. In the processing process, the lower surface of the gear box is arranged as the positioning reference, and the upper surface is processed. The bearing hole is machined on the following end surface and the side surface of the box body. The clamping method uses the manual tightening screw thread clamp. The fixture has been specially designed. Reliable clamping is guaranteed.

This design is suitable for mass production requirements to ensure processing quality conditions, reduce production time as much as possible, improve production efficiency, reduce production as the main direction of development, but also present in machine processing industry. Because this design is for the actual production, the gearbox parts drawings are analyzed, and the transmission function and structure in many respects, that can guarantee the process to meet the production needs, and can guarantee the required size and technical requirements, and the design of the fixture box, bearing decent hole machining precision and error analysis. Ensure that the fixture can be used in practical production.

Key words: gearbox processing technology  positioning  clamping fixture design

目  錄  

摘  要 I

Abstract II

第1章 緒論 1

1.1 選題背景 1

1.2 選題意義和發(fā)展現(xiàn)狀 1

1.3 設(shè)計的主要內(nèi)容 2

第2章 變速箱體工藝規(guī)程設(shè)計 3

2.1 零件分析 3

2.1.1 零件的作用 3

2.1.2 變速箱體結(jié)構(gòu)特點 3

2.2 變速箱體工藝性 4

2.2.1 零件工藝分析 4

2.2.2 箱體選材和毛坯控制 4

2.3 工藝路線 5

第3章  銑箱體上平面夾具設(shè)計 8

3.1 銑床夾具 8

3.2 定位基準(zhǔn)與誤差 8

3.3 銑削力與夾緊力計算 9

3.4 夾緊裝置及夾具體設(shè)計 9

3.5 夾具設(shè)計及操作的簡要說明 9

第4章 刀具 11

4.1 刀具選用 11

4.2 刀具材料 11

4.3 切削控制 12

總 結(jié) 13

致 謝 14

參考文獻(xiàn) 15

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A0-變速器箱體零件圖.dwg

A1-變速器箱體毛坯圖.dwg

A1-銑頂面夾具裝配圖.dwg

變速箱箱體機械加工工藝及夾具設(shè)計開題報告.doc

外文翻譯.doc

工序卡.doc

文件清單.txt

汽車變速器箱體機械加工工藝及夾具設(shè)計文獻(xiàn)綜述.doc

汽車變速箱箱體機械加工工藝及銑上平面、銑頂面夾具設(shè)計.docx