【正文】 ecting the fixture force. Fixture specification range from inches itinerary, 5 pounds clamping force of the sixinch trip, 400inch clamping force. The characteristics of modern production is being smaller and smaller quantities and product specifications biggest changes. Therefore, in the final stages of production, assembly of production, quantity and product design changes appear to be particularly vulnerable. This situation is forcing many panies to make greater efforts to rationalize the extensive reform and the previously mentioned case of assembly automation. Despite flexible fixture behind the rapid development of flexible transport and handling devices, such as backward in the development of industrial robots, it is still expected to increase the flexibility fixture. In fact the important fixture devices the production of the devices to strengthen investment on the fixture so that more flexibility in economic support holders. According to their flexibility and fixture can be divided into : special fixture, the fixture binations, the standard fixture, high flexible fixture. Flexible fixture on different parts of their high adaptability and the few lowcost replacement for the characteristic. Forms can transform the structure of the flexible fixture can be installed with the change of structure ponents (such as needle cheek plate, Multichip ponents and flake cheek plate), a nonstandard work piece gripper or clamping elements (for example : mencement standard with a clamping fixture and mobile ponents fixture supporting documents), or with ceramic or hardening of the intermediary substances (such as : Mobile particle bed fixture and heat fixture tight fixture). To production, the parts were secured fixture, the need to generate clamping function, its fixture with a few unrelated to the sexual submissive steps: According to the processing was part of that foundation and working characteristics to determine the work piece fixture in the required position, then need to select some stability flat bination, These constitute a stable plane was fixed in the work piece fixture set position on the clampprofile structure, all balanced and torque, it has also ensured that the 7 work features close to the work piece. Finally, it must be calculated and adjusted, assembly or disassembly be standard fixture ponents required for the position, so that the work piece firmly by clamping fixture in China. In accordance with this procedure, the outline fixture structure and equipped with the planning and recording process can be automated control. Structural modeling task is to produce some stable flat bination, Thus, these plane of the work pieces clamping force and will fixture stability. According to usual practice, this task can be humanmachine dialogue that is almost pletely automated way to pletion. A manmachine dialogue that is automated fixture structure modeling to determine the merits can be conducted in an anized and planning fixture design, reduce the amount of the design, shortening the study period and better distribution of work conditions. In short, can be successfully achieved significantly improve fixture efficiency and effectiveness. Fully prepared to structure programs and the number of material circumstances, the pletion of the first successful assembly can save up to 60% of the time. Therefore fixture process modeling agencies is the purpose of the program have appropriate documents. 8 摘 要 機械加工過程是一個產(chǎn)生形狀的過程，在這過程中，驅(qū)動裝置使工件上的一些材料以切屑的形式被去除。盡管在某些場合，工件無承受情況下，使用移動式裝備來實現(xiàn)加工，但大多數(shù)的機械加工是通過既支承工件又支承刀具的裝備來完成。 關(guān)鍵詞 ： 加工 ； 基礎(chǔ) 9 加工 基礎(chǔ) 作為產(chǎn)生形狀的一種加工方法，機械加工是所有制造過程中最普遍使用的而且是最重要的方法。機械加工過程是一個產(chǎn)生形狀的過程，在這過程中，驅(qū)動裝置使工件上的一些材料以切屑的形式被去除。盡管在某些場合，工件無承受情況下，使用移動式裝備來實現(xiàn)加工，但大多數(shù)的機械加工是 通過既支承工件又支承刀具的裝備來完成。 機械加工在知道過程中具備兩方面。小批生產(chǎn)低費用。對于鑄造、鍛造和壓力加工，每一個要生產(chǎn)的具體工件形狀，即使是一個零件，幾乎都要花費高額的加工費用?？亢附觼懋a(chǎn)生的結(jié)構(gòu)形狀，在很大程度上取決于有效的原材料的形式。一般來說，通過利用貴重設(shè)備而又無需特種加工條件下，幾乎可以以任何種類原材料開始，借助機械加工把原材料加工成任意所需要的結(jié)構(gòu)形狀，只要外部尺寸足夠大，那都是可