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Substrate-wire cooperative preheating device for arc additive manufacturing and method thereof

An additive manufacturing and substrate technology, which is applied in the field of substrate-wire synergistic preheating devices for arc additive manufacturing, can solve the problems of the final quality of the additive components, the inability to spread the deposited metal, and the scrapping of components. Reduce solidification rate, improve heat dissipation, reduce oxidation effect

Inactive Publication Date: 2020-10-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the additive manufacturing process is piled up layer by layer, if the problem of inability to spread the deposited metal is not solved, it will have an impact on the final quality of the additive component, and even cause the component to be scrapped

Method used

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  • Substrate-wire cooperative preheating device for arc additive manufacturing and method thereof
  • Substrate-wire cooperative preheating device for arc additive manufacturing and method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] Select AZ91 magnesium alloy welding wire with a diameter of 1.2mm; 5mm thick AZ91D magnesium alloy substrate additive straight wall as an example. The specific steps are:

[0036] (1) Establish the solid geometric model of the part, import the part model into the computer for slicing and path planning, and set the required additive process parameters;

[0037] (2) Before starting the additive process, let the substrate preheating controller be powered on, and after the power indicator light is on, set the substrate preheating temperature to 150°C through the digital display regulator, and turn on the preheating switch;

[0038] (3) After the preheating indicator light is on, the high thermal resistance wire in the ceramic chip preheater starts to heat up, and the heat is transferred to the substrate. The thermocouple temperature sensor placed between the substrate and the ceramic chip transmits the temperature data to the substrate preheating controller. When the therm...

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Abstract

The invention belongs to the field of additive manufacturing, and particularly relates to a substrate-wire cooperative preheating device for arc additive manufacturing and a method thereof. The substrate-wire cooperative preheating device comprises a ceramic sheet heater, a thermocouple temperature sensor, high-heat resistance wires, spiral resistance wires, an infrared temperature sensor and a preheating controller, wherein the ceramic sheet heater is arranged below a substrate; the thermocouple temperature sensor is arranged on one side of the substrate; the high-heat resistance wires are laid in the ceramic sheet heater; the spiral resistance wires are arranged at the periphery of a wire; and the infrared temperature sensor is used for measuring the temperature of the wire heated by thespiral resistance wires. According to the substrate-wire cooperative preheating device for arc additive manufacturing and the method thereof, the substrate is preheated, the macroscopic morphology ofthe first layer of an additive is improved, the metallurgical combination of deposited metal and base metal of the substrate is enhanced, and the solidification rate of molten metal is reduced, so that the escaping of gas in a molten pool is facilitated; and in addition, preheating is synchronously carried out in the wire feeding process of the wire, so that under the condition that a current ofa welding machine is not increased, the metal deposition amount is increased, the oxidation is reduced, and the uniformity of a microstructure is improved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a substrate-wire collaborative preheating device and method for arc additive manufacturing. Background technique [0002] Additive manufacturing technology can directly manufacture complex components at low cost and become the most potential material processing technology. For the low-cost, high-efficiency and rapid near-net shape of large-scale and complex components, the arc additive manufacturing technology developed based on surfacing technology has become the most suitable method. [0003] At present, the arc additive manufacturing technology has been relatively mature, but there are still problems to be solved in the aspects of forming morphology, stress control and structure uniformity. These problems are more prominent for light alloy materials such as aluminum and magnesium alloys. On the one hand, due to the good heat dissipation performance of alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/12B23K9/133B23K9/32B33Y40/00
CPCB23K9/04B23K9/124B23K9/133B23K9/32B33Y40/00
Inventor 范霁康朱科宇王克鸿杨东青彭勇李晓鹏周琦
Owner NANJING UNIV OF SCI & TECH
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