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畢業(yè)設(shè)計（論文）
題目： 氣門搖臂軸支座的機械加工工藝及夾具設(shè)計
系 別 航空工程系
專業(yè)名稱 機械設(shè)計制造及其自動化
班級學號 078105301
學生姓名 呂途
指導教師 于斐
二 零 一 一 年 六 月
氣門搖臂軸支座的機械加工工藝及夾具設(shè)計
學生姓名： 呂途 班級： 0781053
指導老師： 于斐
摘要：機械加工行業(yè)作為一個傳統(tǒng)而富有活力的行業(yè)，近十幾年取得了突飛猛進的發(fā)展，在新經(jīng)濟時代，行業(yè)呈現(xiàn)了新的發(fā)展趨勢，由此對其它的質(zhì)量，性能要求有了新的變化?，F(xiàn)在機械加工行業(yè)發(fā)生著結(jié)構(gòu)性變化，工藝工裝的設(shè)計與改良已成為企業(yè)生存和發(fā)展的必要條件，工藝工裝的設(shè)計與改良直接影響加工產(chǎn)品
的質(zhì)量與性能。
本文首先介紹了氣門搖臂軸支座的作用和工藝分析，其次確定毛坯尺寸，然后進行了工藝規(guī)程設(shè)計，最后進行夾具設(shè)計。此次設(shè)計是對氣門搖臂軸支座的加工工藝和夾具設(shè)計，其零件為鑄件，具有體積小，零件結(jié)構(gòu)簡單的特點，由于面比孔易加工，在制定工藝規(guī)程時，就先加工面，再以面為基準來加工其它，其中各工序夾具都采用專用夾具，其機構(gòu)設(shè)計簡單，方便且能滿足要求。
關(guān)鍵詞：氣門搖臂軸支座，工藝分析 ，工藝規(guī)程設(shè)計 ，夾具設(shè)計
指導老師簽名：
The machining process and fixture design of the Valve Rocker Arm Bearing support
Student name: Lv Tu Class: 0781053
Supervisor: Yu Fei
Abstract:Machining industry ,as a traditional and vibrant industry, has been rapidly developed for a few past decades. In the new economic area,the industry presented a new development trend,and the trends also changes the quality and the performance of the production in some new abstracts. Machining industry is now taking place in structural changes, process design and improvement of equipment has become the necessary conditions of the enterprise survival and development, process equipment design and improved products directly affect the quality and performance.
This article introduces the role and process analysis of the valve rocker arm bearing support,followed by determining blank size, and then proceed to order the design process, the final fixture design. What will be disgned is The machining process and fixture design of the Valve Rocker Arm Bearing support,which has the chatacteristics of three abstrcat.its components for castings, with a small size, simple structure and the characteristics of parts,because the surface is easier than the easy processing, point of order in the development process, the surface on the first processing , and then to surface as a benchmark to other processing, including the processes used special fixture, and its design is simple, convenient and can meet the requirements.
KEYWORDS: Valve rocker arm bearing support, process analysis, Process design, fixture design
Signature of Supervisor:
目錄
1緒論..........................................................................................................................1
1.1 本設(shè)計的內(nèi)容及意義……………………………………………….….........1
1.2 課題背景知識………………………………………………….……….....…2
1.2.1 零件的作用……………………………………………………………......2
1.2.2柴油機相關(guān)知識介紹 2
1.2.3 機械制造工藝技術(shù)相關(guān)知識......................................................................3
1.2.4 機床夾具設(shè)計基礎(chǔ)知識..............................................................................4
2 氣門搖臂軸支座的機械制造工藝規(guī)程設(shè)計 7
2.1 零件的工藝分析及生產(chǎn)類型的確定 7
2.1.1零件的作用 7
2.1.2零件的工藝分析 8
2.1.3確定零件的生產(chǎn)類型 9
2.2 選擇毛坯，繪制毛坯圖 10
2.2.1選擇毛坯種類 10
2.2.2確定毛坯尺寸及機械加工總余量 10
2.2.3設(shè)計毛坯圖 12
2.2.4繪制毛坯圖.................................................................................................12
2.3 選擇加工方法，制定工藝路線 12
2.3.1定位基準的選擇 12
2.3.2零件表面加工方法的選擇 13
2.3.3加工階段的劃分 14
2.3.4工序的集中與分散 14
2.3.5工序順序的安排 15
2.3.6確定工藝路線 16
2.3.7加工設(shè)備及工藝裝備的選擇.....................................................................17
2.3.8工序間余量的確定.....................................................................................18
2.3.9切削余量及基本時間定額的確定 20
3 氣門搖臂軸支座專用夾具的設(shè)計...........................................................30
3.1確定夾具的結(jié)構(gòu)方案 30
3.1.1確定定位方案，選擇定位元件.................................................................30
3.1.2 確定導向裝置............................................................................................32
3.1.3確定夾緊機構(gòu).............................................................................................32
3.1.4確定輔助定位裝置.....................................................................................33
3.2設(shè)計夾具體 33
3.3 夾具裝配圖上標注尺寸、配合及技術(shù)要求 33
總結(jié) 36
參考文獻 37
致謝 38