Ultrasonic-assisted laser material additive manufacturing device and realization method thereof

Abstract

The invention discloses an ultrasonic-assisted laser material additive manufacturing device, which comprises a precise double-shaft numerical control rotating table, a support fastening base, a mold, an ultrasonic device, a base plate and a powder supply spray nozzle, wherein the precise double-shaft numerical control rotating table mainly consists of a double-support rotating table and a processing table; the support fastening base is arranged on the processing table; the mold is arranged on the support fastening base and is provided with a groove; the ultrasonic device is arranged in a way of passing through the processing table and the support fastening base and is connected with the bottom of the mold; the base plate is arranged in the groove formed in the mold; the powder supply spray nozzle is positioned above the base plate. The invention also provides a realization method of the ultrasonic-assisted laser material additive manufacturing device. The ultrasonic vibration is transmitted to the base plate, so that the base plate generates resonance; ultrasonic vibration stirring is performed in a molten pool formed under the laser effect in the laser material additive manufacturing process; a cavitation effect and a mechanical effect are generated; the combination state between layers can be improved; the formation probability of microsegregation and air holes inside forming elements can be reduced; meanwhile, crystal grains are refined; the residue stress is reduced; the forming elements with the good mechanical property are obtained.

Description

technical field [0001] The invention belongs to the field of laser additive manufacturing, and specifically relates to an ultrasonic-assisted laser additive manufacturing device, which improves the internal quality of the laser additive manufacturing molten pool and reduces its internal stress by adding ultrasonic waves. Background technique [0002] Laser additive manufacturing technology (a type of 3D printing technology), as an important supplement to existing material processing technologies such as casting, forging, welding, etc., plays an important role in the rapid prototyping and repair of high-performance metal parts with complex structures. In the past 20 years, it has become one of the frontier research hotspots in the field of international material processing engineering and advanced manufacturing technology. At present, researchers at home and abroad have carried out a lot of research work on the equipment, technology, structure and performance of laser additiv...

AI Technical Summary

Problems solved by technology

[0003] However, in the forming process of laser additive manufacturing, the melting, solidification and cooling of materials are carried out under relatively fast conditions, and there are complex physical, chemical and metallurgical reactions inside the molten pool, which makes the formed workpiece prone to pore inclusion fusion Poor quality defects such as macro deformation cracking and micro cracks

In addition, due to the uneven local heating and stress distribution caused by the forming method, the final structure has heavy micro-segregation and special interface structure, which will also have a certain impact on the mechanical properties of the formed part.

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