Parts jig bushings basic concepts in use

 Kunshan bearings: 1, the fixture concept: in the machining process, in order to ensure accuracy, the fixed piece, so that the position to accept the occupancy determination processing or testing process equipment referred to as machine tool fixture, referred fixture.
2, the clamping device requirements:
A) shall not undermine the workpiece clamping process occupies a position in the clamp position.
2) The clamping force should be appropriate, it is necessary to ensure that the workpiece positioned in the processing stability, but also to prevent damage due to the clamping force is too large, or the surface of the workpiece clamping excessive deformation.
3) safe operation, and effort.
3, fixtures classification
1) divided by Machine Type: Lathe jigs, milling fixtures, drilling jigs, jig boring machines, machining centers, fixtures, jigs and fixtures Other
2) Press the power source of the work: manual clamps, pneumatic clamps, hydraulic clamps, electric clamps, magnetic clamps, vacuum fixture, automatic clamping fixture
3) according to the degree of universal jigs and fixtures minutes:
① universal fixture can taper roller bearing processed within a certain range of different workpieces, such as the jaw self-centering lathe chucks, four-jaw chuck. Flat on a milling machine vise, dividing head, rotary table.
Using the occasion, the use of universal fixture clamp the workpiece relatively time-consuming, complicated operation, low productivity, and difficult to fixture. The universal fixture mainly for single and small batch, a fixed mass of the product is rarely used in common fixture, the use of special fixtures and high efficiency.
② special fixture for a workpiece in a procedure designed fixture. High positioning accuracy for mass production.
③ into groups based on group technology principles fixture design. Used for group processing fixture. As long as a little change on the fixture some components, different components within the group can be processed. Bearings
④ combination fixture is made from recyclable components assembled into a standard fixture easy connection and removal of fixtures. Trial for new products and more varieties of small batch production.
⑤ pallet is automatically online using a jig.
4, the role of the fixture
A) ensure that the workpiece machining accuracy
2) to improve labor productivity and reduce processing costs
3) expand the range of technology and changing machine tool applications
4) improve working conditions and to ensure production safety.