Forming technique of hub with bidirectional cylindrical boss

Abstract

The invention provides a forming technique of a hub with a bidirectional cylindrical boss. The forming technique forms and manufactures the hub with the bidirectional cylindrical boss by adopting an impact forging composite formation process, and comprises the steps as follows: firstly, a blank is stretched to form a conical part with a protruding edge via two times of stretch; secondly, two times of shrinkage edge turning and shaping of the punched conical part are performed, and a blank central cylinder wall is formed; lastly, the bidirectional cylindrical boss is formed step by step via four times of upsetting. Therefore, the formation defects of a hub with the bidirectional cylindrical boss, formed by adopting ways of monoblock cast, welding and processing with a forging machine, are overcome. The hub with the bidirectional cylindrical boss, formed via the forming technique is high in utilization ratio of material, formation efficiency and formation precision, and is better in overall mechanical property.

Description

technical field [0001] The invention relates to a forming process of a two-way cylindrical boss hub, which uses sheet metal punching and forging to form a two-way cylindrical boss hub, and belongs to the field of sheet metal punching and forging. [0002] Another technical purpose of the present invention is to provide a molding device for realizing the above-mentioned bidirectional cylindrical boss hub molding process. Background technique [0003] For hubs with bidirectional cylindrical bosses, the traditional processing methods are integral casting, tailor welding and forging machining. With the method of integral casting, the inherent defects in the casting process, such as pores, shrinkage porosity, cracks, etc., are not easy to control, and the mechanical properties of castings are lower than those of plastic forming parts, and the efficiency is also lower. Tailored welding requires more investment in tooling, molds and equipment, and the manufacturing cost is high. A...

AI Technical Summary

Problems solved by technology

With the method of integral casting, the inherent defects in the casting process such as pores, shrinkage porosity, cracks, etc. are not easy to control, and the mechanical properties of castings are lower than those of plastic forming parts, and the efficiency is also lower

Tailored welding requires more investment in tooling, molds and equipment, and the manufacturing cost is high. At the same time, the accuracy of the parts of the welding assembly is affected, and the performance of the welding heat-affected zone is reduced, which reduces the overall quality.

Using the forging machining method, the metal flow line is destroyed, the production efficiency is low, the material utilization rate is low, and the mechanical properties are low. The parts of the key parts cannot meet their use requirements.

Images