Fixture design and use can make parts quickly and accurately installed into the fixture. It is installed at a location in the processing equipment. Therefore, in the use of fixture processing parts, parts can be quickly and accurately placed in the processing location, to ensure that the processing quality of parts to meet the requirements, which is the main reason for the widespread use of fixture in production.Generally speaking, jig can be summarized into four aspects: it can ensure the processing quality of parts stably, reduce scrap rate; It can improve the productivity of parts; Can expand the processing equipment processing range; It can improve the working conditions of workers.In short, the fundamental purpose of using tools is to improve the productivity of product parts and obtain better economic benefits on the premise of ensuring the quality stability of product parts and meeting technical requirements. Therefore, the design of the fixture is the same as other technical work. This is not only a technical problem, but also an economic one. Whenever designing a set of lamps and lanterns, necessary technical and economic analysis should be carried out in order to obtain better economic benefits for the designed lamps and lanterns.