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Method for rapidly decreasing water-oxygen content of forming chamber in additive manufacturing process and system

A technology of additive manufacturing and water and oxygen content, applied in the direction of additive manufacturing, additive processing, etc., to achieve the effect of increasing social benefits, improving the degree of automation, and shortening the preparation time

Pending Publication Date: 2021-01-15
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, titanium alloy powder metal additive manufacturing is relatively mature, but there is no dedicated rapid atmosphere protection and purification system for titanium alloy / magnesium alloy laser & arc fuse additive manufacturing

Method used

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  • Method for rapidly decreasing water-oxygen content of forming chamber in additive manufacturing process and system
  • Method for rapidly decreasing water-oxygen content of forming chamber in additive manufacturing process and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] In this embodiment, the internal volume of the sealed cavity is about 9.5m 3 , respectively select the following hardware according to the above system:

[0042] 1. Leybold large vacuum pump (5.5KW), 2. Chengdu Jiuyin constant oxygen sensor (0-25%), 3. Chengdu Jiuyin trace oxygen sensor (0-1000ppm), 4. Finnish Verasa dew point meter (0-25%) 1000ppm), 5. Star instrument pressure sensor (absolute pressure 0-120Kpa), 6. Thermocouple temperature sensor, 7. Siemens S7-1200PLC controller, 8. Analog input and output module, 9. Digital input and output, 10. Solenoid valve for SMC vacuum (1.2Mpa), 11.20Kg copper catalyst purification column, 12. Equipment status warning device (with three-color light and buzzer), 13. Siemens HMI display screen, equipment sealing test before the experiment, pumping Vacuum to 100Pa, keep the pressure for one hour, the internal cavity pressure is ≤200Pa, the test can only be continued if the conditions are met, if the conditions are not met, the l...

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PUM

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Abstract

The invention discloses a method for quickly decreasing the water-oxygen content of a forming chamber in an additive manufacturing process and a system. As for a sealed atmosphere chamber, a mode of combining vacuumizing, gas washing and circulating purification is adopted, vacuumizing and circulating purification work in a cooperative linkage mode, and thus the water-oxygen content in the sealedchamber can be quickly decreased to the working state; and the preparation time before magnesium alloy / titanium alloy forming is greatly shortened, the working efficiency of equipment is greatly improved, the manufacturing cost of titanium alloy parts is reduced, the production period is shortened, and the socialized income is increased.

Description

technical field [0001] The invention belongs to the field of titanium alloy / magnesium alloy laser / arc additive manufacturing (3D printing), and specifically relates to a method and system for rapidly reducing the water and oxygen content of a forming chamber during additive manufacturing. Background technique [0002] Additive manufacturing (Additive manufacturing, AM) is a promising technology with low consumption, high efficiency, economy and can greatly shorten the research and development time. Scholars at home and abroad have carried out extensive research. However, when it comes to specific additive manufacturing processes, different processes are suitable for different occasions due to their different characteristics. For example, laser selective melting and electron beam powder forming sample have high precision, but the deposition efficiency is low. In addition, due to the constraints of its confined space, it cannot be formed. Medium and large parts. [0003] Comp...

Claims

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Application Information

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IPC IPC(8): B22F10/32B22F10/18B22F12/00B22F12/90B33Y30/00B33Y40/00
CPCB33Y30/00B33Y40/00
Inventor 方学伟任传奇蒋笑李帛洋白浩杨健楠黄科卢秉恒
Owner XI AN JIAOTONG UNIV
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