Laser rapid prototyping protective gas inlet device

Abstract

The invention relates to a laser rapid prototyping protective gas inlet device, belongs to the technical field of laser rapid prototyping gas inlet systems and provides the laser rapid prototyping protective gas inlet device which is simple in structure and convenient to use, can effectively adjust the air inlet volume and improves the protective gas inlet efficiency. According to the adopted technical scheme, a plurality of gas inlets are formed in the cavity wall of a prototyping cavity and connected with a gas inlet manifold through a gas inlet channel, and a regulating valve is arranged on the gas inlet manifold and connected with a master control system. The laser rapid prototyping protective gas inlet device is widely used for filling the prototyping cavity with protective gas in the laser rapid prototyping process.

Description

technical field [0001] The invention relates to a laser rapid forming protective gas intake device, which belongs to the technical field of laser rapid forming intake systems. Background technique [0002] 3D printing technology (laser rapid prototyping) is a new processing technology that uses laser, CAX, automatic control and other technologies to directly use "stacking" to make a three-dimensional model. Since the processing process eliminates the need for intermediate processes such as mold opening and cutting, 3D printing technology has unique advantages in the processing of entities with small batches and complex structures. 3D printing technology can shorten the processing cycle by more than 70%, save materials by more than 90%, and reduce manufacturing costs by more than 50%. It is known as a revolution in global manufacturing technology. [0003] At present, the typical 3D printing forming methods are: selective laser sintering (SLS), selective laser melting (SLM),...

AI Technical Summary

Problems solved by technology

At present, when SLS and SLM are formed, the protective gas inlet device still has the following problems: ①The inlet channel is single, and the molding cavity is inflated with low efficiency

Shielding gas inlet devices often use one inlet channel, so they are less efficient in filling the molding cavity

② Uneven airflow

There are often corners in the intake pipe. When the gas passes through the corner, it is easy to form a dead zone of air flow, which will cause uneven air flow.

③ Difficult to control gas flow and flow direction

During the forming process, when the protective gas distribution in the forming cavity is uneven, the air intake device cannot automatically adjust the gas flow and flow direction, so it will have a certain impact on the quality of the formed part

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