Machine tool fixture according to the degree of specialization is divided into general and special, combined clamp; by the usage of the machine tool can be divided into fixture for lathe, milling machine fixture clamping; according to the power source can be divided into manual, pneumatic, hydraulic fixture.
（1）According to the degree of specialization
General fixture have been standard,can be used to process in a certain range.
The lathe chuck with three jaws and four jaw chuck,the milling machine vice,dividing head and rotary table.
In general this kind of fixture is produced by the professional factory, often as a machine tool accessories To provide to the user. Its characteristic is the wide adaptability.The production efficiency is low, mainly is suitable for the single piece, small batch production.
This type of fixture is designed for a particular part of the processing procedures .
The future is compact structure, the operation is fast, convenient, labor-saving, can ensure the high processing precision and the production efficiency, but a longer cycle of designing and manufacturing, high manufacturing cost . When the product is changed, the fixture will be unable to use and scrap. OnlyApply to fixed products and the production of larger quantities.
3.General adjustable fixture and Group Fixture
Its characteristic is the partial element of fixture can be replaced,Part of the device can be adjusted,In order to adapt to the different parts of theProcessing.
Fixture for the machining of similar parts of the group,Known as the modular Fixture. Compared with Group Fixture, general adjustable fixture processing object is not very clear, adaptable range is more wider.
4. Modular fixture
Modular fixture is refers to the processing requirements of parts,
A set of advanced manufacturing standard parts and components of the assembly
Fixture. Produced by professional manufacturers, its characteristic is flexible, strong universal, short manufacturing cycle, element
can be used repeatedly, particularly applicable to the trial of new products and production of small batch.
Follower fixture is a fixture used in automatic line. The fixture is used toclamping workpiece
and also with the workpiece as a whole along the line from one station to the next station,for different procedures.
（2） Classification by the use of machine tools classification
Because of all kinds of machine tools and its characteristics and structure are not the same,
The requirements of the different kinds of fixture structures are
different. According to the machine bed is not the same, the fixture can be divided into: lathe fixture, milling machine fixture, drilling fixture, boring machine fixture, grinder fixture, gear machine tool fixture and other machine fixture.
（3）According to the power source
Fixture can be divided into manual fixture, pneumatic fixtures, hydraulic fixtures, gas fixtures by force, electromagnetic fixture, vacuum fixtures and so on.