Solution to the deformation of the middle open type parts of the shaft type cylindrical parts

The machining deformation occurs in the shaft type cylindrical parts produced by a factory, resulting in deformation of all the workpieces, and there is no qualified product. The factory found the technical personnel of Juhang Technology to reflect the status quo, and hoped to help the plant to solve the problem of machining deformation of the intermediate opening parts of the shaft type cylindrical parts.

First of all, to solve the problem of internal stress of the workpiece after processing. If there is no stress inside the workpiece, the workpiece will not be deformed, so the internal stress after machining the workpiece must be eliminated. In combination with the actual situation of the plant, if the heat aging is adopted, since the workpiece has been processed and fixed, the surface of the workpiece cannot be oxidized, and the workpiece of the heat aging is also deformed. The use of thermal aging is not suitable in this plant. The workpiece is processed by JH vibration aging equipment , which is very energy-saving, environmentally friendly and time-saving. It also has the following advantages: the vibration has no oxidized surface, the stress relief effect is very good; the vibration aging of the workpiece after finishing is not deformed; the aging time of the workpiece is very short, and the rapid reaction capability of the process is improved.

Before the workpiece is aging, some necessary processes and measures must be taken on the workpiece. Because in the process of processing, the workpiece must generate internal stress due to the processing, which is also the main reason for the deformation of the workpiece. How to eliminate the machining internal stress of the workpiece when the workpiece is not deformed is a key step in processing the qualified product. First, the semi-circular groove on the workpiece is not completely opened, and a process rib that has not been processed is left at the center of the circle, just like roughing first. At this time, although there is machining internal stress in the workpiece, it is left in the middle. A rib, so the internal stress of the workpiece can not be released, then the workpiece will not be deformed due to internal internal stress, and then aging treatment is performed using JH vibration aging equipment.

The spectrum aging function of JH-300A spectrum vibration aging equipment is to find multiple low-order harmonics, multi-dimensional multi-harmonic vibration, and multi-harmonic vibration to generate multi-directional dynamic stress by Fourier analysis without scanning. , superimposed with the residual stress of the multi-dimensional distribution, resulting in plastic yielding, thereby reducing the peak residual stress while homogenizing the residual stress distribution. There are no special requirements for the support point, the excitation point and the vibration measurement point, and it can handle the high rigidity and high natural frequency which cannot be processed by the sub-resonance. The processing process is simple and can meet the requirements of the workpiece with high dimensional accuracy.

After the JH vibration aging equipment is used, the internal stress of the workpiece is balanced, and the internal stress of the workpiece is almost completely eliminated. That is to say, there is no internal stress in the workpiece, and the workpiece will not be deformed after subsequent processing. After that, the same test was performed on several pieces of the workpiece, and the effect was completely the same. After the process of zui, the workpiece processed according to this process is 100% qualified, which solves the problem of processing deformation of the plant.