A method and device for producing cylindrical or tubular bimetal parts

Abstract

The invention discloses a method for producing cylindrical or tubular bimetallic parts. The circular bar or tube is placed on a loading tray, and the loading tray moves downward while rotating, thereby driving the bar or tube. The pipe is rotated and moved down, and the injection nozzle is used on the surface of the rod or pipe to form an additive layer on the rod or pipe with the process of metal precision spraying. The temperature of the solidus line of the additive layer is A, and the temperature of the additive layer is Use a percussion device to perform radial percussion on the part of A ± 8% A degree Celsius. This can greatly shorten the vertical distance between the knocking device and the injection nozzle, and beat the part of the additive layer close to its solidus temperature, the metal deformation resistance is small, and a small striking force is enough to make it dense Simplify and improve the organizational structure of the additive layer, avoid secondary heating, high production efficiency, energy saving and environmental protection. And the present invention also provides a kind of equipment of implementing above-mentioned production method. The invention is used for the additive processing of rods or pipes.

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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