The main cause of fixture errors in CNC lathe operation

The main cause of fixture errors in CNC lathe operation

The main cause of fixture errors in the operation of CNC lathes is that the manufacturing precision of each fixture component is not high, the installation accuracy is not high, and the wear of the fixture during use is exposed. Fixture errors will directly affect the azimuth accuracy and scale accuracy of the workpiece’s appearance, and the azimuth accuracy of the processed surface will be more affected.

Under the effects of cutting force, transmission force, inertial force, clamping force and gravity, the general process system will deform accordingly, and then destroy the correct orientation between the adjusted tool and the workpiece, causing several shape errors in the workpiece. And scale errors.

For example, when a CNC lathe is used to turn an elongated shaft, under the effect of the cutting force, the workpiece exhibits a “knife” phenomenon due to elastic deformation, causing a cylindrial error of the waist of the workpiece. For example, when grinding the hole by the transverse cutting method on the inner cylindrical grinding machine, the ground hole will exhibit a taper cylindricity error due to the bending deformation of the inner circular grinding head spindle.

CNC lathe manufacturers

Useful methods commonly used in the production of CNC lathes are: reducing the surface roughness value of the touch surface diameter; increasing the touch area; properly pre-tightening; reducing the touch deformation, improving the touch stiffness; reasonably arranging the ribs, improving the partial stiffness Add auxiliary support to improve the rigidity of the workpiece. For example, when turning the slender shaft, use the center frame or the tool holder to improve the rigidity of the workpiece; properly clamp the workpiece and reduce the clamping deformation. For example, when using a thin-walled sleeve, use an open transition ring or a special claw. Clamping.

Post time: Aug-10-2018