Prestressed quench hardening and grinding composite processing method

Abstract

The invention provides a prestressed quench hardening and grinding composite processing method, belongs to the technical field of material surface mechanical processing and particularly relates to the prestressed quench hardening and grinding composite processing method for integrating grinding, quenching and residual stress control. The processing method comprises the following steps that a workpiece to be ground is arranged in a prestress loading device, when the workpiece is installed in place, the pretensioning stress is applied on the workpiece, at the moment, and the two parts are combined into an assembly body; the assembly body is placed in a grinding mechanism, the grinding position in the grinding mechanism realizes the loading, the clamping and the fixation of the assembly body, and after the loading, the clamping and the fixation are completed, the grinding mechanism carries out dry grinding processing on the workpiece in the assembly body without applying grinding liquid; after the grinding processing is finished, the air cooling is carried out until the temperature of the workpiece is reduced to the room temperature; and when the temperature of the workpiece reaches the room temperature, the pretensioning stress is unloaded, the workpiece is taken out from the prestress loading device, and the prestressed quench hardening and grinding processing of the workpiece is completed.

Description

technical field [0001] The invention belongs to the technical field of material surface machining, and in particular relates to a prestressed hardening and grinding composite processing method integrating grinding, quenching and residual stress control. Background technique [0002] In the process of mechanical processing, grinding is often the final processing method of parts. The final surface integrity index of parts is closely related to the grinding process. It is widely used in manufacturing and is known as "industrial teeth". It is closely related to modern equipment. The development of the manufacturing industry is inextricably linked. Grinding must meet the development requirements of green manufacturing, and it is also a major trend in the development of grinding technology in the future. [0003] At present, there are three methods for grinding, including traditional grinding, prestressed grinding and grinding and hardening. [0004] The traditional grinding met...

AI Technical Summary

Problems solved by technology

But its disadvantages also have two aspects. One is that this processing method does not consider the "anti-fatigue" performance of the parts during the grinding process, and the residual tensile stress on the surface of the workpiece is relatively large, which fails to make the best use of the material and achieve the maximum use. In order to improve the fatigue life, wear resistance and corrosion resistance of parts, it is necessary to set up a separate residual stress control process, which increases the investment in equipment, personnel, sites, etc., and is not conducive to the further improvement of productivity; the second is this processing method It will generate high grinding heat, and the workpiece will be deformed after processing (the effect is more obvious for thin-walled workpieces), which greatly affects the machining accuracy of the workpiece

Cause the surface quality of parts to decline, thus limiting the promotion and application of this technology

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