Gas protecting system of metal powder laser quick forming machine

Abstract

The invention discloses a gas protecting system of a metal powder laser quick forming machine. The metal powder laser quick forming machine comprises a sealing forming bin, the gas protecting system comprises a gas circulating purifying mechanism, the gas circulating purifying mechanism comprises an explosive-proof and smoke dust-removal purifier, the explosive-proof and smoke dust-removal purifier is connected with the sealing forming bin through a gas inlet pipe and a gas outlet pipe to form the gas circulating purifying, and is sequentially provided with a water filtering device, a filtering element device, a circulating fan device and a drying machine from an inlet to an exit, and electric valve switches are respectively arranged on the gas inlet pipe and the air outlet pipe. The gas protecting system has the advantages that the oxygen content of the forming environment is controlled to be less than 100ppm, the smoke dust produced in the forming process can be filtered to balance the gas pressure of the forming bin, and the compactness of the formed part reaches 100%; the bright metal luster is realized, and the oxidizing is avoided; the consumption amount of inert gas is saved, the consumption amount of gas is only equal to 2 / 100 of the consumption amount of gas of the prior art, and the economic benefit is higher.

Description

【Technical field】 [0001] The invention relates to a gas protection system of a metal powder laser rapid prototyping machine. 【Background technique】 [0002] With the development of 3D printing technology, the direct manufacturing technology of metal powder laser rapid prototyping machine has become the focus of attention. The parts formed by the existing metal powder laser rapid prototyping machine cannot meet the needs of users. Customers require high molding precision, high density, no oxidation, bright metal color, smooth surface, and the existing metal powder laser rapid prototyping machine The machine also has the problems of low precision, low density, serious oxidation, yellow or dark metal color, and rough surface. There are many reasons for this. One of the key reasons is that the forming chamber is not completely sealed, and the forming environment contains oxygen. If the amount is high, a large amount of smoke and dust generated during the molding process will fa...

AI Technical Summary

Problems solved by technology

[0005] The oxygen content of the existing metal powder laser rapid prototyping machine cannot be stably controlled, and the oxygen content is high. The formed titanium powder and other flammable metal powders are in danger of explosion. Many explosion accidents have been witnessed, and the safety of equipment and personal safety cannot be guaranteed.

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