A piezo-driven droplet ejection device for additive manufacturing of high melting point metals

Abstract

The invention discloses a piezoelectric driving type micro-droplet jetting device suitable for high melting point metal additive manufacturing. A support body is a steel structural component; a plurality of positioning holes are uniformly distributed on a bracket; and a plurality of mounting screw holes and foundation leveling bolts are reserved on a base. A piezoelectric driving device is formedby sequentially connecting three portions including a piezoelectric driver, a thermal insulation module and a metal guide rod from top to bottom; and a lifting device is composed of a micro motor, a screw shaft, a substrate, a workbench and the like, is connected with an upright column of a support through a connection plate and drives the screw shaft depending on the micro motor to drive the workbench to perform reciprocating motion. For a metal nozzle cavity, the interior is high temperature resistant ceramic, and the exterior is a cylindrical metal shell; and a nozzle is of a flaky detachable structure, the size surface of the nozzle is provided with a gas supply channel, and the nozzle is connected to the lower part of the metal shell through a bolt. The device has the advantages of simple structure, high temperature resistance, adjustment in an interval between the guide rod and a spray hole, coaxial gas supply, small size, high accuracy and good uniformity of produced metal droplets and the like.

Description

technical field [0001] The invention relates to a piezoelectric-driven droplet ejection device suitable for additive manufacturing of high-melting point metals, and belongs to the technical field of additive manufacturing by droplet injection. Background technique [0002] The technology of freeform fabrication with micro-dropletjetting is an important branch of rapid prototyping technology or additive manufacturing technology. No need for traditional tools and fixtures and multiple processing procedures, only relying on external force to force the forming material to be sprayed from the nozzle hole to the substrate in the form of micro-droplets or capillary jets, and deposit and superimpose the forming material point by point and layer by layer at a certain speed , so as to form the required two-dimensional text pattern, dot matrix or three-dimensional entity. Droplet jetting additive manufacturing technology can use a wide range of forming materials, high forming precisio...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned problems that the auxiliary device of the pneumatic droplet ejection device is huge and difficult to control, the supply pressure is unstable, and the piezoelectric-driven droplet ejection device is restricted by the working temperature, the present invention provides a method suitable for high-melting point metal additives. The piezoelectric-driven droplet ejection device made of metal materials is suitable for high-melting point metal droplet injection additive manufacturing systems. It has the advantages of simple structure, adjustable driving distance, small droplet size and high precision.

Images