A kind of ultrasonic vibration 3D printing device and printing method

Abstract

The invention discloses an ultrasonic vibration 3D printing device and a printing method. The device comprises: a printing substrate, a heating cavity is installed on the printing substrate, a metal plate is placed in the heating cavity, a printing head and an ultrasonic vibration mechanism are also installed in the heating cavity and sheet metal clamping mechanism. The beneficial effect of the present invention: not only ensure the local heating of the upper layer of the printed part, but also ensure the transmission of ultrasonic energy, and at the same time, the anti-adhesion coating on the outside of the metal plate avoids the adhesion with the powder during forging; it can reduce or eliminate The current printing parts have poor dimensional accuracy, and are prone to defects such as microcracks, pores, looseness, and coarse grains, which improves the performance of printed parts; the material has a wide range of applications, not only suitable for TC4 and TA15 titanium alloys with low thermal conductivity , high-temperature alloys, etc., and is suitable for materials such as copper alloys and aluminum alloys with high thermal conductivity; the printed parts have high dimensional accuracy, and due to the small amplitude of ultrasonic forging, it does not affect the current 3D printing near-net shape.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to an ultrasonic vibration 3D printing device and a printing method. Background technique [0002] Selective Laser Melting (SLM) in 3D printing, also known as selective laser melting technology, is one of the rapid prototyping technologies and belongs to the new rapid prototyping technology. This technology uses a laser beam with high laser energy density to fully melt powder materials, and can directly form parts with complex structures, and the parts have good mechanical properties, high density, and high precision. The formed parts only need simple polishing and grinding. application. It has the advantages of a wide range of material powders, diversified uses of formed parts, and intuitive and simple forming process. The ability to form parts with complex structures is the biggest advantage of SLM forming over traditional manufacturing. It does not require a series of assist...

AI Technical Summary

Problems solved by technology

[0005] (1) The deformation of the parts due to thermal stress during printing is relatively large, which requires an additional margin, which increases production costs and reduces production efficiency;

[0006] (2) The printing structure and performance of the part need to be improved. The TC4 titanium alloy with low thermal conductivity is a basket structure and occasionally accompanied by a small amount of Widmanstatten structure, which is easy to cause cracking when the part is formed or used. There are a small amount of crack defects due to thermal stress when printing materials with high conductivity;

[0007] (3) Some high-temperature alloy parts have poor fusion after printing, and sometimes there are a small amount of micro-cracks inside;

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