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机械外文翻译--机床夹具的分类与构成.doc
7页1、Machine classification and pose fixture1 fixture in the role of machiningWorkpiece clamping fixture is a kind of process equipment, it is widely used in mechanical machining of the manufacturing process, heat treatment, assembly, welding and testing processes. In the use of metal-cutting machine tools collectively referred to as the jig fixture. n a modern production machine is an indispensable fixture of the process equipment, machining of the workpiece, the processing requirements in order to
2、ensure. First of all to the workpiece and the machine tool relative to a correct position, and this location during processing does not change the impact of external forces. To this end, during the pre-machining, workpiece clamping must be good. There are two ways to clamp workpiece: one is directly clamping the workpiece in the machine table or on the chuck; The other is the workpiece in the fixture on the fixture. The first method used when the workpiece clamping, the general design requiremen
3、ts have to press lines in the surface to draw the size and location, clamping, or when the needle is zoned dial indicator to find is after the clamping. This method need special equipment, but low efficiency, are generally used for one-piece and small batch production. Large quantities, mostly with the workpiece clamping fixture. With the merits of the workpiece clamping fixtures are as follows:(l) Guarantee the stability of the machining accuracy of workpiece. Workpieces with clamping fixture,
4、the workpiece relative to the location of tool and machine tool to ensure the accuracy of the fixture from the technical level of workers, so that a number of workpiece machining accuracy of the line. (2) To improve labor productivity. Workpiece clamping fixture can facilitate the user easily、rapidly, and the workpiece does not need to find is crossed, can significantly reduce the supplementary working hours, to improve labor productivity; workpiece in the fixture after the fixture to improve th
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