The composition of special machine tool fixtures
Fixtures are generally composed of the following components or devices:
(1) Positioning elements
Positioning elements are used to determine the correct position of the workpiece. The positioning base surface of the workpiece to be machined and the fixture positioning elements in direct contact or fit.
(2) Clamping device
Clamping device is a device that enables the workpiece to maintain its correct positioning position under the action of external forces.
(3) Tool setting elements, guiding elements
Tool setting elements, guiding elements are used to determine (or guide) the tool relative to the fixture positioning elements with the correct position of the components, such as drilling sleeve, boring sleeve, tool block, etc.
(4) Connecting element
Fixture connecting elements are used to determine the correct position of the fixture on the machine and connected to the components, such as the positioning keys mounted on the bottom surface of the milling machine fixture.
(5) Other components and devices
According to the processing requirements, some fixtures still need to set indexing indexing device, against the mold device, workpiece lifting device and auxiliary support devices.
(6) Clamping body
Clamp specific is used to connect the fixture components and related devices to make it a whole of the foundation, the fixture is connected to the machine through the clamp specific.
Positioning elements, clamping devices and clamping devices are the basic components of the fixture, other parts can be set according to the needs.