The fixture is a process device used to quickly tighten the workpiece during machining to maintain the correct relative position of the machine tool, tool, and workpiece. That is to say, the Workholding fixture is an indispensable part of machining. Under the development of machine tool technology to high speed, high efficiency, precision, compound, intelligent and environmental protection, the fixture technology is moving towards high precision, high efficiency, module, combination and general purpose. The economic direction is developing.

A module is a product with special attributes. Among a wide variety of products, modules of the same attribute can be coordinated and matched, and modules of different arrangements can form different products. Modules are characterized by independence, interchangeability, and versatility. First of all, the module can be used separately, involved in processing, production and other aspects. Secondly, modules can be interchanged according to interfaces, structures, etc., making modular assembly production more convenient and faster. Third, the module will not be specifically limited to a certain production area, so the module can be applied to various production areas, improving the convenience of production. It can be seen from this that the module has a very large production advantage over the traditional production parts, so in the future, modular assembly production will inevitably become the main production method.