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How To Judge The Accuracy Of A CNC Vertical Machine Center

Mar 17, 2020

cnc vertical machine center

High-precision CNC vertical machine center is the basis for improving the precision and speed of mold processing. It has become an inevitable trend that high-precision machining centers replace traditional machining centers. The accuracy of the CNC vertical machine center affects the quality of the machining. Therefore, the industry has also been researching methods to reduce and even eliminate errors regarding the accuracy of the CNC vertical machine center.


How to judge the accuracy of a CNC vertical machine center?

1. Positioning of the test piece in the CNC vertical machine center: The test piece should be located at the middle position of the X stroke, and placed along the Y and Z axes at the appropriate position suitable for the positioning of the test piece and the fixture and the length of the tool. When there are special requirements for the location of the test piece, it shall be specified in the agreement between the manufacturer and the user.


2. Fixation of the test piece: The test piece should be easily installed on a special fixture to achieve the maximum stability of the tool and fixture. The mounting surface of the fixture and the test piece should be straight.


The parallelism of the mounting surface of the test piece and the clamping surface of the fixture shall be checked. Appropriate clamping methods should be used so that the tool can penetrate and machine the entire length of the center hole. It is recommended to use countersunk screws to fix the test piece to avoid interference between the cutter and the screw. Other equivalent methods can also be used. The total height of the test piece depends on the chosen fixing method.


3. Test piece materials, cutting tools and cutting parameters: The test piece materials, cutting tools and cutting parameters are selected according to the agreement between the manufacturer and the user, and should be recorded.


4. Test piece size: If the test piece is cut several times, the overall size is reduced, and the hole diameter is increased. When used for acceptance inspection, it is recommended to choose the final profiled test piece size consistent with the requirements in this standard, so as to reflect it truthfully. Cutting accuracy of the machining center. The test piece can be used repeatedly in cutting tests, and its specifications should be kept within 10% of the characteristic size taxis given in this standard. When the test piece is used again, a thin layer cutting should be performed to clean all the surfaces before testing.

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