CNC machine tool geometric accuracy test

(1) Straightness 1. Straightness of a line in a plane or space, such as the straightness of the guide rail of a CNC horizontal lathe bed;

2, the straightness of the component, such as the straightness of the longitudinal reference T-slot of the CNC lifting table milling machine table;

3. Straightness of motion, such as the straightness of the X-axis axis movement of the vertical machining center.

Length measurement methods are: flat ruler and indicator method, steel wire and microscope method, collimating telescope method and laser interferometer method.

Angle measurement methods include: precision level method, self-collimator method and laser interferometer method.

(2) Flatness (such as the flatness of the countertop of the vertical machining center)

Measurement methods include: plate method, plate and indicator method, flat rule method, precision level method and optical method.

(3) parallelism, equidistance, coincidence line and parallelism of the surface, such as the parallelism of the top axis of the CNC horizontal lathe to the movement of the main tool holder slide;

Parallelism of motion, such as the parallelism between the working surface of the vertical machining center and the X-axis axis;

Isometric, such as the equidistance between the vertical machining center positioning hole and the table rotation axis;

Coaxiality or coincidence, such as the coincidence of the axis of the tool hole of the CNC horizontal lathe and the axis of the spindle.

The measurement methods are: flat ruler and indicator method, precision level method, indicator and test stick method.

(4) The perpendicularity of the straightness line and the plane, such as the verticality between the vertical axis of the vertical machining center and the movement of the X-axis axis;

The verticality of motion, such as the verticality between the Z-axis and the X-axis of the vertical machining center, is measured by: flat and indicator method, square and indicator method, optical method (such as autocollimator, optical square) , emitters).

(5) Rotating radial runout, such as the radial runout of the chuck positioning cone surface of the spindle end of the CNC horizontal lathe spindle, or the radial runout of the spindle positioning hole;

Periodic axial turbulence, such as periodic axial turbulence of the CNC horizontal lathe spindle;

The end face jumps, such as the jump of the end face of the card determination bit of the CNC horizontal lathe spindle.

Measurement methods are: indicator method, test rod and indicator method, steel ball and indicator method.

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