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摘 要
機械產(chǎn)品的生產(chǎn)過程是一個復雜的過程。機械制造工藝是機械制造方法和過程的總稱。而生產(chǎn)過程中改變生產(chǎn)對象的形狀、尺寸、相對位置和性質(zhì)等，使其成為成品或半成品的過程，則稱為工藝過程。它是生產(chǎn)過程中的主要部分，其他過程稱為輔助過程。本次畢業(yè)設計的課題是活塞的工藝設計，主要內(nèi)容如下：
首先，進行零件的分析，主要是零件作用的分析和工藝分析，通過零件分析可以了解零件的基本情況，而工藝分析可以知道零件的加工表面和加工要求。根據(jù)零件圖提出的加工要求，確定毛坯的制造形式和尺寸的確定。
第二步，進行基面的選擇，確定加工過程中的粗基準和精基準。根據(jù)選好的基準，制訂工藝路線，通常制訂兩種以上的工藝路線，通過工藝方案的比較與分析，再選擇可以使零件的幾何形狀、尺寸精度及位置精度等技術(shù)要求得到合理的保證的一種工序。
第三步，根據(jù)已經(jīng)選定的工序路線，確定每一步的切削用量及基本工時，并選擇合適的機床和刀具。對于粗加工，還要校核機床功率。
最后，設計第5道工序的夾具。先提出設計問題，再選擇定位基準，然后開始切削力、夾緊力的計算和定位誤差的分析。然后把設計的過程整理為圖紙。
根據(jù)以上的概述完成本次設計。
關(guān)鍵詞；活塞；機械加工工藝設計；夾具設計；
ABSTRACT
The mechanical product production process is a complex process. The machine manufacture craft is the machine manufacture method and the process always called. But in the production process changes the production object the shape, the size, the relative position and the nature and so on, causes it to become the end product or the half-finished product process, then is called the technological process. It is in the production process main part, other processes are called the supporting process. This graduation project topic is the piston technological design, main content as follows:
First of all, it is mainly analysis of the function of the part and craft analysis to carry on the analysis of the part, through part analyses can find out about basic situation of part, and craft analyses may know the processing surface of the part and is it require to process. The processing demand put forward according to the part picture, confirm the manufacture form of the blank and sureness of the size.
The second step, carry on the choice the base , confirm thick datum and precise datum in the processing course. According to the datum chosen , make the craft route , usually make the craft route of more than two kinds, with analysing through the comparison of the craft scheme, and then choosing be able to make such specification requirements as the precision of geometry form , size of the part and precision of position ,etc. get a kind of process of the rational assurance s.
The third step, according to the already selected process route, confirm for every steps of cutting consumption and basic man-hour , choose suitable lathe and cutter. To rough machining , will check the power of the lathe .
Finally, designs the 5th working procedure the jig. First proposed the design question, the then preferred orientation datum, then starts work, to clamp the strength the computation and the position error analysis. Then the design process reorganization is the blueprint.
According to above outline cost design.
Key words Piston; Machine-finishing technological design; Clamps tool
design;