【導(dǎo)讀】機(jī)床專用夾具分類與組成……………………連桿的機(jī)械加工工藝過(guò)過(guò)程分析……………精加工工序分開。逐步減少加工余量、切削力及內(nèi)應(yīng)力的作用，并修正加工后。的變形，就能最后達(dá)到零件的技術(shù)要求。加工表面為軸瓦鎖口槽、油孔、大頭兩側(cè)面及體和蓋上的螺栓座面等。并引起內(nèi)應(yīng)力重新分布。連桿的實(shí)際加工過(guò)程中，選用連桿的大小頭端面及小頭孔作為主要定位基面，同時(shí)選用大頭孔兩側(cè)面作為一般定位基準(zhǔn)。為保證小頭孔尺寸精度和形狀精度，

　　

【正文】 w materials technology and modern management systems technology in product design, manufacturing and management of production, sales and after sale service and other aspects of the application. It will continue to absorb all kinds of achievement of new and high technology and traditional manufacturing technology, make the manufacturing technology into the production process can control the material flow, energy flow and information flow of the system engineering. 2 the present developing situation of advanced manufacturing technology In recent years, the manufacturing industry of our country is the use of advanced manufacturing technology, but pared with developed country, still exists a stage of the overall gap. (1) the management of. Industrial developed country is widely used in puter management, pay attention to anization and management system, production model of the updated development, introduced the production time ( JIT ), agile manufacturing ( AM ), lean production, concurrent engineering ( LP ) ( CE ) and other new management ideas and technology. Our country has a few large enterprises local using puter aided management, most of the small enterprises is still at the stage of experience management. (2) the design. Industrial developed countries continue to update the design data and guidelines, the new design methods, extensive use of puteraided design ( CAD / CAM ), large enterprises start to design and production drawings. Our country uses CAD / CAM technology is relatively low. (3) manufacturing process. Industrial developed countries widely used high precision machining, processing fine, fine processing, micro machine and micro / nanotechnology, laser processing technology, electromagic technology, super plastic processing technology and the posite processing technology and other new processing method. China39。s popularity rate is not high, which is still in development, grasp. (4) automation technology. Industrial developed countries generally use the numerical control machine tool, machining center and flexible manufacturing unit ( FMC ), flexible manufacturing system ( FMS ), puter integrated manufacturing system ( CIMS ), to realize flexible automation, intelligence, integration of knowledge. Our country is in standalone automation automation level, rigid, flexible manufacturing unit and system in only a few enterprises use. 3of our country39。s advanced mechanical manufacturing technology development trend (1) the globalization. On one hand because of the international and domestic market petition more and more intense, for example in the mechanical manufacturing industry, many enterprises at home and abroad, and even the high visibility of the enterprise, in the relentless petition have lost, some closing down, some by annex. Many while the domestic market share of the enterprise, to expand the new market。 on the other hand, work munication technology and the rapid develop of enterprises to promote petition and cooperation in both directions, this develop further intensifies the international petition in the market. The two reason interactions, has bee a global manufacturing industry development, globalization of manufacturing the first technique is based on work, work munication technology to realize manufacturing globalization. (2) automation. Automation s a dynamic concept, it studies mainly in manufacturing system integration technology and system technology, puter integrated manufacturing system, manufacturing technology, manufacturing process planning and schedule , flexible manufacturing technology and adapt to modern production mode of manufacturing environment etc.. Manufacturing automation technology is the development trend of global manufacturing, agile manufacturing, worked manufacturing, virtual manufacturing, intelligent manufacturing and green manufacturing. Manufacturing technology is not only the measure of a country39。s level of development of science and technology is the important sign, also be the focus of international petition in science and technology. Our economy is at a critical period of development, manufacturing technology is our weak link. Only keep up with the development of advanced manufacturing technology in the world, put it in a strategic priority, and with enough strength to be implemented, can quickly narrow the gap with developed countries, ability is in intense market petition remain invincible. In short, in our country the research and development of advanced manufacturing technology to be imperative