Lathe fixture is used to determine the correct position of the workpiece in a lathe, and clamp the workpiece, and plays an important role in the turning process. Common lathe folder has:
1) The universal fixture. Such as three-jaw chuck, four jaw chuck and various forms of the thimble.
2) adjustable fixture. Group of fixtures, modular fixture.
3) special fixtures. Actual use of the fixture to meet a process of a workpiece, such as the rotating turret.
Production, in order to ensure product quality, increase productivity, reduce labor intensity, should be the correct choice and use of fixtures.
Turning the role of the fixture
A. Improve the machining accuracy, and ensure product quality
Lathe fixture is to ensure the accuracy of the size of the technical requirements of the parts processing, an important measure of surface roughness and the relative position between surface accuracy.
The correct selection of the lathe fixture is to choose a suitable fixture of manufacturing precision and structure. Such as a variety of automatic centering fixture can be selected: low available jaw chuck, four jaw chuck, require high concentricity concentricity requirements in order to ensure the concentricity requirements of parts machined surface and datum available when the soft jaws, cone mandrel retainer and liquid plastic clamp.
Two. Increase labor productivity
Fixture with a certain structure, can significantly improve production efficiency. In production, usually a fixture of the following structure to increase productivity:
1) the rapid clamping and removal of the fixture, auxiliary time can be shortened, and reduce labor intensity.
2) The special positioning is a special fixture, you can shorten the time of adjustment and correction. 3) the number of fixtures, the second fixture can be processed multiple parts to shorten the production time of a single piece.
3) The automatic control of fixtures, such as hydraulic "one machine" operation can be realized by model or program control.
4). Give full play to the performance of the machine
The use of special fixtures can expand the scope of the use of the machine in order to achieve a machine can. Such as a common lathe to configure a dedicated rotating turret can be processed ball, if the configuration is a swing the turret can be processed surface of the leaves.
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