梯形丝杆的介绍

Method of Straightening Non-standard Screw

作者:   日期:2019-07-03  来源:  关注:0

First, cold straightening: In fact, cold straightening can also be divided into two kinds. First, the blank of non-standard screw before rough turning is straightened, mainly to ensure the roundness after rough turning; secondly, the rough turning of screw is carried out before the thread of fine turning or plate fine turning. But the effect of straightening is basically the same as that of thermal straightening, which is to ensure the normal processing and the improvement of accuracy of non-standard screw. Although there are two ways of cold straightening, under normal conditions, the use of pressure is more, because the blank straightening is mainly carried out on the operating table of the press bed, this way can be used. Find out the maximum bending point of non-standard screw by 100% so that the curvature can be effectively guaranteed within the prescribed range.


2. Thermal straightening: When the non-standard screw is quenched and tempered after heat treatment, the editor suggests that we do not choose the way of thermal straightening, because thermal straightening is mainly to check the deformation of the workpiece after cooling, if it exceeds the technical requirements, then it needs straightening treatment. Normally, it is also carried out by means of pressure. The calibration is within the prescribed range. This kind of calibration method can not easily cause the springback of the workpiece, and can effectively guarantee the quality of the work after finishing.


There is also the way of semi-finishing, which is also to immerse the semi-finishing workpiece in the oil pool at the specified temperature after straightening, mainly in order to make the stress of the workpiece can be effectively eliminated in the subsequent straightening process, and it is not easy to rebound after finishing. The accuracy of the workpiece can be maintained for a long time, and this alignment method is more suitable for non-standard screw with higher accuracy requirements.


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