How to check the accuracy of CNC machining center during operation?

How to check the accuracy of CNC machining center during operation? During the operation of the CNC machining center, the accuracy inspection problem is very important, which directly affects the standardization of our parts. Whether a machine tool is good or not depends on its accuracy. If the accuracy is not high enough, resulting in deviations in the dimensions of the workpiece, it will directly affect the precision of your machine tool.

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

　　 2. The fixed test piece should be conveniently 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 between the installation 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 full length of the center hole. It is advisable to use countersunk screws to fix the test piece to prevent interference between the tool and the screw. Other equivalent methods can also be used. The total height of the test piece depends on the fixing method selected.　　

　　3. The data of the test piece, the tool and the cutting parameters The data of the test piece, the cutting tool and the cutting parameters are selected according to the agreement between the manufacturer and the user, and should be recorded. The recommended cutting parameters are as follows: 　　

　　Cutting speed: about 50m/min for cast iron parts; about 300m/min for aluminum parts. 　

　　 Feed amount: about (0.05~0.10)mm/tooth.　

　　Cutting depth: The radial depth of cut for all milling operations should be 0.2mm.

4. The size of the test piece. If the size of the test piece is cut several times, the size of the shape is reduced, and the hole diameter is increased. When used for acceptance inspection, it is recommended that the final generalized processing test piece size is the same as the rules in this specification, so as to reflect the machine tool accurately. Cutting accuracy. The test piece can be used repeatedly in the cutting experiment, and its specification should be kept within ±10% of the characteristic scale given in this code. When the test piece is used again, a thin-layer cutting should be carried out before a new fine-cutting experiment is carried out to clean up all appearances.

　　In many places, people often use accuracy to measure product errors. The smaller the error, the greater the limit value to withstand. This is often a problem that people pay more attention to in the CNC machining center industry.