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How to improve the precision of the workpiece when machining center
From:Taian Haishu Machinery Co.,Ltd. Updatetime:2015-12-10 9:12:07 Views:
Any processing equipment, set during the processing, such as processing route, process preparation, processing cutting tool selection, the machine itself, the clamping and workpiece material, etc. Have a problem, for the final machining pre

Any processing equipment, set during the processing, such as processing route, process preparation, processing cutting tool selection, the machine itself, the clamping and workpiece material, etc. Have a problem, for the final machining precision and machining efficiency can cause certain effect, vertical machining center as a highly precise and efficient processing equipment, reduce the workpiece machining error of the method commonly used to reduce the original error method, error compensation method, the error transfer method, grouping method, the error averaging method and synthetic method, etc.

A, error synthesis method to eliminate the error of the machine tool itself is to ensure that the workpiece machining accuracy eventually most main method.Error synthesis method for measuring the various original error of each axis machine tool.By laser interferometer has the characteristics of high measuring precision, flexible use, is the measuring device of vertical machining center is a major now. 
 
Second, the error compensation method of error compensation method is artificially make an error, to offset the process system inherent in the original error, or use a primitive error to offset another original errors, thus achieve the purpose of improving vertical machining center workpiece machining accuracy.Usually by reducing machine clearance, improve the machine tool stiffness, the preload, make relevant with pre-tightening force, and eliminate the gap.Also can improve the rigidity of workpiece and tool reduce the overhanging length cutting tool, workpiece, to improve the stiffness of process system.Also can be used in a reasonable way of clamping and processing mode, reduce the cutting force and its change, reasonably choose the cutting tool material, increasing the rake Angle and the Angle, workpiece material and reasonable heat treatment to improve the material to processing performance of several kinds of methods. 
 
Three, directly reduce the original error method directly the original error method refers to find out the main original error factors affecting the machining accuracy, managed to to eliminate or reduce the direct.Such as vertical machining center after using for a long time, due to natural wear and tear of the transmission system to locate phrase, reverse clearance, etc. 
 
Four, error averaging method, average method is to use a close contact between the surface of the comparison and mutual correction, or use as the benchmark for processing, to achieve the goal of elimination of errors in processing of vertical machining center. 
 
The essence of the five, the error transfer method of error transfer method is a collection of error in the system of transfer of technology, comprehensive error caused by the mechanical deformation and thermal deformation, etc.Such as vertical machining center for some hole processing, coaxial degree not by spindle rotation accuracy of workpiece to guarantee, but by the fixture, when the machine tool spindle and the workpiece with floating connection, the original error of machine tool spindle no longer affect the machining accuracy, and transferred to the fixture to ensure the machining accuracy. 
 
Six, error grouping in vertical machining center, because of the existence of working procedure blank error caused by the process of machining error.This process the influence of the change of the blank error, there are two main: response error and position error. 
 
If the error is too big, can't guarantee the machining precision, but also to improve precision of the blank or procedure, the machining accuracy is not very realistic.Error grouping method can be used at this moment, namely the size according to the error or process on the blank size is divided into n groups, each group of blank error is reduced to 1 / n, and then press groups respectively to adjust the relative position of cutter and workpiece or adjust the positioning components, thus can greatly reduce the whole batch of workpiece size range.Error is the essence of grouping method is used to improve accuracy of measurement method to make up for the inadequacy of the machining accuracy, so as to eliminate the influence of processing error.

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