The characteristic of built up fixture and classification what is built up fixture?

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  • source:MARSTEN CNC Machining
Built up fixture is the tooling with very high rate of a kind of standardization, seriation, generalization, our country gains ground basically already at present. The standard unit of the different figure with good by a prefabricate built up fixture, different specifications, different measurement and component are assembled and become. Graph 3-40 is be machined dish of process chart of kind of spare parts. Graph 3-40 dish kind a characteristic built up fixture that gets built up fixture of radial aperture process chart is general it is the special fixture that assembles for the some working procedure of some workpiece, also can assemble general and adjustable clamping apparatus or into group clamping apparatus. Built up fixture applies to of all kinds machine tool, but use at most with jig and lathe clamping apparatus. The design of built up fixture special fixture, make, use, the one-way process that discard as useless turns into assemble, break, clean the put in storage, loop process that assembles again. Can use the design of a few hours that assembles cycle to replace a few months to make cycle, shortened thereby production is periodic; Saved man-hour and stuff, reduced manufacturing cost; Still can reduce area of clamping apparatus storeroom, be helpful for managing. The component precision of built up fixture tall, wear-resisting, and realized complete interchange, component precision is IT6~IT7 class commonly. With the work that built up fixture processes, positional precision can amount to IT8~IT9 class commonly, if be adjusted meticulously, can reach IT7 level. Because built up fixture has a lot of advantages, special apply to new product trial-produce and production of much breed small lot, development is so rapid in recent years, application is wider. The main drawback of built up fixture is bulk bigger, stiffness is poorer, investment is much, cost is high, this makes the promotion application of built up fixture is restricted certainly. Built up fixture divides the department that it is groove and aperture to fasten two kinds big. CNC Milling