An ultrasonic post-processing device and method for selective laser melting complex parts

Abstract

The invention discloses an ultrasonic post-processing device and method for selective laser melting of complex parts. The device includes an ultrasonic generating device, an ultrasonic exciter, a substrate, an operating table, a compressed air machine and a vacuum cleaner. By using the device and method of the present invention, the traditional heat treatment stress relief step and the influence of residual powder can be replaced, and the substrate with parts is ultrasonically vibrated before wire cutting, and the stress of the parts is removed while removing the residue remaining inside the complex parts The powder reduces the influence of residual powder on parts; the invention can improve the quality of complex parts in the process of manufacturing complex parts by selective laser melting, and at the same time accelerate the manufacturing speed of selective laser melting parts.

Description

technical field [0001] The invention belongs to the technical field of selective laser melting, and in particular relates to an ultrasonic post-processing device and method for selective laser melting of complex parts. Background technique [0002] Additive manufacturing, also known as 3D printing technology, is a major breakthrough in modern manufacturing technology in recent years. Compared with traditional processing technologies such as cutting, cutting, and grinding, which have the disadvantages of high technical difficulty, large cutting volume, low material utilization rate, long cycle and high cost, additive manufacturing has the following technical advantages: 1) The overall utilization rate of materials is high; 2) Less manufacturing process and short cycle; 3) Manufacture of complex structural parts; 4) Free design, without considering the manufacturing process, etc. Therefore, additive manufacturing technology has good market prospects and broad application pros...

AI Technical Summary

Problems solved by technology

However, for parts with complex structures, metal powder is easy to remain inside. If it is not cleaned up in time, the powder will solidify into agglomerates during subsequent heat treatment. During wire cutting, the wire cutting fluid enters the inner cavity and the powder condenses inside the part, which affects the quality of the part. Quality leads to scrapping of parts

However, although the method of natural failure can eliminate the residual stress of components, the reduction of residual stress is limited, the efficiency is low, and the processing time is too long

[0004] At present, the powder removal method for parts is mainly to reduce and remove the printing residual powder through compressed air flow and vacuum cleaner blowing and suction. However, due to the complex structure with many internal cavities and variable inner flow channel structures, the powder is not easy to be removed from the parts, reducing the cost. Qualified product rate of parts

For parts containing inner runners and inner cavities, powder will remain in the inner runners and inner cavities after printing. Due to the limitations of compressed air flow and industrial vacuum cleaner tooling and blowpipes, and the diameter of the inner runners of the parts is small, The powder outlet of the inner cavity is small, and the air flow is easy to form backflow in the inner flow channel and the inner cavity, which cannot be cleaned in time, and the powder remaining inside the part affects the quality of the part, reduces the qualified rate of the part, and increases the production cost

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