Method and equipment for producing cylindrical or tubular bimetallic parts

Abstract

The invention discloses a method for producing cylindrical or tubular bimetallic parts. A circular bar or tube is put on a loading tray, and the loading tray rotates and meanwhile moves down so as todrive the bar or the tube to rotate and move down. The surface of the bar or the tube forms an additional material layer through a jet nozzle by a precise metal jet forming process, the solidus temperature of the additional material layer is A, and the part with the temperature A being + / -8%A DEG C of the additional material layer is radially knocked by knocking equipment. Thus, the space betweenthe knocking equipment and the jet nozzle in the vertical direction can be greatly shortened. The part, approaching the solidus temperature, of the additional material layer is knocked, the resistanceto metal deformation is small, and the additional material layer is enough to be densified by less beat force and the tissue structure of the additional material layer is improved. Secondary heatingis avoided, the production efficiency is high, and energy conservation and environment protection are realized. The invention further provides equipment for implementing the production method. The method is used for additional material processing of the bar or the tube.

Description

technical field [0001] The invention relates to the field of precision spray forming, in particular to a method and equipment for producing cylindrical or round tube bimetal parts. Background technique [0002] Metal spray forming has excellent performance because of its ultra-high condensation rate, which can make metal crystals without macro-segregation, and most of the strengthening phases are evenly distributed in the form of fine pellets. However, because the metal liquid is condensed and deposited in the form of droplets, it is inevitable that small gaps or porosity will be generated during the process; especially when spray forming is used as a double additive layer, porosity is more likely to occur between the sprayed deposited metal and the parent metal, so that the bonding surface cannot Meet the performance requirements of working parts such as rolls and cutting tools under high stress. [0003] The application number 2016205256555 records "a precision spray form...

AI Technical Summary

Problems solved by technology

However, because the metal liquid is condensed and deposited in the form of droplets, it is inevitable that small gaps or porosity will be generated during the process; especially when spray forming is used as a double additive layer, porosity is more likely to occur between the sprayed deposited metal and the parent metal, so that the bonding surface cannot Meet the performance requirements of working parts such as rolls and cutting tools under high stress

[0003] The application number 2016205256555 records "a precision spray forming and repairing equipment capable of continuous production" has certain limitations: because the pressure processing parts such as forging or rolling are far away from the spray deposition area, the air velocity during the spray forming process is as high as 300 m / s, resulting in rapid cooling of the additive layer, which requires high pressure for pressure processing, and the corresponding equipment is complex and huge

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