Machining Technology to Guarantee Position Tolerance of Main Hole System of Precision Box Parts of CNC Machine Tool

Abstract

The invention discloses a processing technology for ensuring the position tolerance of a main hole series of a precision box part of a numerical control machine tool. The processing technology includes the following steps that (1) firstly, three process datum surfaces are machined in a workpiece in the X / Y / Z axis direction; (2) the finish machining amount of the radial and end machined surface ofa first hole and a second hole is left, and the rest of processing contents like surfaces, holes and grooves without position precision requirements of the main hole series are all machined and moldedaccording to the design requirements; (3) the X / Y / Z / W related precision error of a processing main machine is detected and recorded before the fine boring process; (4) the three process datum surfaces in the workpiece in the X / Y / Z axis direction are corrected, and the six freedom degrees of X, [X-arrow], Y, [Y-arrow], Z and [Z-arrow] are limited; (5) fine boring is conducted on the first hole, and fine milling is conducted on the end surface of the first hole; and (6) a workbench is rotated by 180 degrees, the steps of (4) and (5)are repeated, fine boring is conducted on the second hole, andfine milling is conducted on the end surface of the second hole. The influence of the precision error of the machining main machine on the machining precision is avoided, and the position tolerance ofthe main hole series of the precision box part can be fully guaranteed accordingly.

Description

technical field [0001] The invention is applied to the processing of CNC machine tool box parts in the metal cutting machine tool industry, especially a processing technology for ensuring the position tolerance of the main hole system of the precision box parts of the CNC machine tool. Background technique [0002] In the traditional processing technology to ensure the position tolerance of the main hole system of precision box parts, in order to ensure the machining accuracy of the position tolerance of the main hole system of precision box parts, the fine boring process of each hole system of the parts will be arranged on the planer / Floor type milling and boring machining center. At present, the finishing equipment used by the manufacturers of precision box parts are all imported equipment, and the processing accuracy of the parts is guaranteed by the processing machine (taking the planer type milling and boring machining center as an example), so the accuracy of the proc...

AI Technical Summary

Problems solved by technology

[0003] This processing technology has its limitations. The factors of the production environment (temperature, seismic source, sunshine, etc.) in the actual production and processing process will have a great impact on the geometric accuracy of the processing machine, and the processing machine itself will also have the following errors;

[0004] 1) Table rotation (B axis) error;

[0005] 2) Runout error of the end face of the turntable;

[0008] Environmental factors can be controlled by relevant means, but the accuracy error of the processing machine itself cannot be avoided, which causes the actual processing accuracy of precision box parts to often fail to meet the design requirements, and the accuracy of the parts can only be recovered by other subsequent means , resulting in too long production cycle of the supporting equipment and high production cost

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