Machining technology of perforated rotating shaft body part

Abstract

The invention provides a machining technology of a perforated rotating shaft body part. The machining technology comprises the following steps of blanking, shot blasting, surface coating, heating, preforging for blank forming, finish forging and normalizing treatment. According to the machining technology, a circular bar material is adopted for integral forging forming, circular bar material preforging for blank forming and finish forging are combined, the flow speed and flow direction of metal in the forging process are controlled by selecting an appropriate performing shape, and therefore the defect problem of an arc bottom and product edges is solved. By means of the technology, the structure performance can be improved, a metal flow line distributed on the contour of a workpiece is formed, the part produces anisotropism, in other words, flow direction comprehensive performance is greatly improved, and therefore application reliability of the product is ensured.

Description

technical field [0001] The invention relates to the technical field of metal machining, in particular to a forging process for a body part of a perforated rotating shaft. Background technique [0002] Such as Figure 1A , 1B 1C shows a schematic diagram of the structure of a perforated shaft body. The body part of the perforated shaft is a special-shaped part with an arc-shaped bottom and a hollow interior. The part is widely used in the field of building anti-seismic. At present, the mainstream production process of this product is produced by casting. The disadvantage of using this process is: since the casting process is a phase change process from liquid phase to solid phase, it is easy to cause shrinkage cavities, shrinkage porosity, inclusions, etc. As-cast defects; segregation will inevitably be caused during the metal crystallization process, making the distribution of chemical components in the formed structure uneven; at the same time, due to the different coolin...

AI Technical Summary

Problems solved by technology

At present, the mainstream production process of this product is produced by casting. The disadvantage of using this process is: since the casting process is a phase change process from liquid phase to solid phase, it is easy to cause shrinkage cavities, shrinkage porosity, inclusions, etc. As-cast defects; segregation will inevitably be caused during the metal crystallization process, making the distribution of chemical components in the formed structure uneven; at the same time, due to the different cooling rates of different parts during the casting process, the size of the formed grains The difference is large, and some parts with slower cooling rates are prone to coarse grains. The existence of coarse grains reduces the load-bearing strength and reliability of parts to a certain extent.

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