機械類外文翻譯--變速箱殼體機械加工工藝設(shè)計-其他專業(yè)-全文預(yù)覽
【正文】 ng of flat generally use planing, milling methods such as processing, processing of hole used mainly boring, processing and multipurpose drilling holes. As the cylinder plex structure. so how to ensure that the mutual position of the surface processing precision is an important issue. The selection of blank Gearbox shell on the materials used are generally gray cast iron HT150,HT200,HT250,there is also cast aluminum or steel plate, this engine block using highstrength alloy cast iron. Cylinder in the processing prior to aging treatment in order to eliminate stress and improve the rough casting mechanical properties. Improve the rough accuracy, reduction of machining allowance, is to improve the automated production line system productivity and processing quality of the important measures. As the foreign boxtype parts of rough quality and high precision, and its productionline system has been implemented directly on the blank line, not only eliminating the need for blank check device also saves the rough quality problems due to waste of machining time, increase overall efficiency. Therefore, the refinement of rough is to improve the productivity of the most promising way out. For the engine block production line, can be rough in parts online premilling six face, removing most of the margin, to facilitate direct online parts. Machining process selection and processing of the benchmark Choose the right processing technology base is directly related to the processing quality can ensure the parts. Generally speaking, process benchmarking can be divided into coarse and fine reference base. Coarse reference base The baseline for the online thick rough ,which is particularly important the choice of benchmark crude, if crude benchmark choice unreasonable, will the uneven distribution of machining allowance, processing and surface offsets, resulting in waste. In the cylinder production line, we have adopted for the coarse side of the base。 processing of high precision typical of boxtype processing part. The main processing of the surface of cylinder block top surface, the main bearing side, cylinder bore, the main and camshaft bearing bore holes and so on, they will directly affect the machining accuracy of the engine assembly precision and performance, mainly rely on precision equipment, industrial fixtures reliability and processing technology to ensure the reasonableness. gearbox shell process design principles and the basis Design Technology program should be to ensure product quality at the same time, give full consideration to the production cycle, cost and environmental protection。 本科畢業(yè)設(shè)計（論文） （外文翻譯） 題 目 75 拖拉機變速箱 殼體 機械加工工藝規(guī)程設(shè)計 學(xué)生姓名 王 娟 專業(yè)班級 機械設(shè)計制造及其自動化（本科二班）
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