CMM fixture is used in the machine manufacturing process to fix the processing object, so that it occupies the correct location to accept the construction or testing device. Depending on the type of test piece to be tested (plastic, metal, etc.), different types of test methods (stretching, compression) need to be replaced by a fixture for testing. Used in the machine manufacturing process to fix the object to the correct position to accept the construction or inspection of the device. Also known as fixtures. In a broad sense, CMM Holding Fixture for Stamping Parts any process in the process, used to quickly, easily and securely install the workpiece device, can be called fixture.
In fact, when milling - do not require a very chaotic fixture, only the need for a large positioning, CMM fixture on it. Its plan principle is also the same with the universal milling machine fixture, joint cnc milling characteristics, here only to start a few fundamental requirements:
In order to preserve the orientation of the part placement and the machine coordinate system and the direction of the coordinate system, CMM Holding Fixture for Stamping Parts the fixture should be able to carry out the orientation placement on the machine tool, and it is required to keep the coordinates between the positioning surface of the harmonious part and the machine.
In order to keep the workpiece in the process of all necessary to complete the surface to be processed rich, the CMM fixture to do it is probably open, so the clamping mechanism between the components and the processing surface should be retained between the stability of the partition, CMM Holding Fixture for Stamping Parts and requires clamping mechanism Components can be low to low, to prevent fixtures and milling machine spindle sleeve or knife sets, cutting tools in the process of collision.
The rigidity and stability of the fixture is better. Even if you do not take the process of changing the clamping point in the process of processing, when the process must be replaced in the clamping point can not be time, CMM Holding Fixture for Stamping Parts be particularly careful not to change the clamping point and damage the fixture or workpiece positioning accuracy.
Commonly used fixture types Milling commonly used fixtures are probably the following:
Almighty with CMM fixture; practical for small-scale production or development of the small and medium-sized workpiece in the cnc milling machine on the milling.
Special CMM fixture; CMM Holding Fixture for Stamping Parts is specifically for a certain or similar to several parts of the workpiece manufacturing fixture, usually in the mass production or development must be taken when.
Multi-station fixture; can simultaneously clamp a number of parts, can reduce the number of tool changes, but also easy to wall processing, CMM Holding Fixture for Stamping Parts a wall loading and unloading parts, is conducive to shrink the preparation time, improve productivity, more suitable for mass production.
Pneumatic or hydraulic fixture; practical for the production of large quantities, to take other fixtures and special labor, laborious parts. Can reduce the labor intensity and improve productivity, but the fixture layout more chaotic, the cost is often higher, and the manufacturing cycle is longer.
Vacuum fixture; practical for a larger positioning plane or a larger sealable area of the workpiece. Some cnc milling machines (such as wall milling machines) are equipped with a universal vacuum platform. When placing the workpiece, the rectangular blanks of the regular shape can be directly fitted with specially made rubber strips (hollow or solid circular sections with positive dimensions) Into the fixture of the sealed slot, CMM Holding Fixture for Stamping Parts and then put the blank, start the vacuum pump, you can clamp the blank. On the shape of the rough, with rubber strips is not appropriate, to be in its surrounding putty (commonly used rubber mud) seal, so do not only very difficult, and take a long time, the effect is low. In order to conquer this difficulty, a special transition vacuum platform can be used to superimpose it on a universal vacuum platform.