A fixture refers to a device used to fix the processing object during the machinery manufacturing process so that it can occupy the correct position for construction or inspection. Broadly speaking, in any process during the process, the device used to install the workpiece quickly, conveniently and safely can be called a fixture. It is also useful in machining. Many times, it is needed when several parts need to be assembled and their positioning must be accurate. The fixture is a process device used to quickly fasten the workpiece during processing and maintain the accurate relative position of the machine tool, tool, and workpiece.
The fixture usually consists of a positioning component (to determine the correct position of the workpiece in the fixture), a clamping device, a tool setting guide component (to determine the relative position of the tool and the workpiece or guide the direction of the tool), an indexing device(the workpiece can be processed at several stations in one installation, with a rotary indexing device and a linear moving indexing device), a connecting component, and a clamp body etc.
The types of clamps can be divided into 4 types according to their usage characteristics.
Universal clamp. Such as machine vises, chucks, suction cups, dividing heads and rotary tables, etc.
Special fixture. It is specially designed and manufactured for the clamping needs of certain product parts in a certain process. The service target is specific and highly targeted. It is generally designed by the product manufacturer itself.
Adjustable clamp. Special fixtures that allow components to be replaced or adjusted.
Combination clamp. A fixture composed of standardized components of different shapes, specifications and uses, suitable for trial production of new products and single-piece, small-batch production and temporary tasks where products are frequently changed.