Shutdown-free smoke dust purification device for metal additive manufacturing

Abstract

The invention discloses a shutdown-free smoke dust purification device for metal additive manufacturing, belongs to the field of material processing, and can realize that a double-smoke dust purification system is adopted, butterfly valves and airflow detection devices are additionally arranged at an exhaust pipe and an air inlet pipe, and the smoke dust purification device can be used for purifying smoke dust in the exhaust pipe and the air inlet pipe. When the electrostatic dust collection pipe in the working state is blocked, the electrostatic dust collection pipe between the exhaust pipe and the air inlet pipe is closed through the butterfly valve, the electrostatic dust collection pipe which does not work is opened at the same time, inert gas enters the electrostatic dust collection pipe which is in the opening state at present through the exhaust effect of the fan and is purified; meanwhile, an operator cleans the electrostatic dust collection pipe in a closed state and waits for next use, the service life of a filter element can be monitored in real time, a dust collection system is automatically switched, consumable replacement of the filter system can be achieved without shutdown, and therefore, continuous machining of equipment can be achieved, and the working efficiency is effectively improved.

Description

technical field [0001] The invention relates to the field of material processing, more specifically, to a non-stop fume purification device for metal additive manufacturing. Background technique [0002] Additive manufacturing, commonly known as 3D printing, integrates computer-aided design, material processing and molding technology, and is based on digital model files. Through software and control systems, special metal materials, non-metal materials and medical biological materials are processed according to extrusion, sintering , melting, photo-curing, spraying and other ways to accumulate layer by layer to produce physical objects. Compared with the traditional processing mode of cutting and assembling raw materials, it is a "top-down" manufacturing method through material accumulation. , from scratch, which makes it possible to manufacture complex structural parts that were constrained by traditional manufacturing methods and could not be realized in the past. [0003...

AI Technical Summary

Problems solved by technology

[0004] The laser additive manufacturing equipment used to solve the problem in the above key technology 1 mainly uses laser to melt metal powder. When the laser irradiates the metal powder, a large amount of smoke and dust will be generated. The existence of smoke and dust will absorb the energy of the laser, resulting in irradiation The laser energy on the powder is insufficient. In order to avoid this situation, the laser additive manufacturing equipment will be equipped with a smoke purification system. The purification system is mainly composed of fans, filters, pipes, valve bodies, etc., which can form a wind field on the forming surface , to blow away the smoke and dust, after the inert gas with smoke passes through the filter device, the smoke dust is blocked by the filter device, and the clean inert gas returns to the processing chamber to realize the recycling of the inert gas, but as the processing time increases, the filter The device will be blocked by smoke and dust, and the inert gas cannot pass through. At this time, the filter device needs to be cleaned

[0005] At present, the laser additive manufacturing equipment is only equipped with a set of smoke purification system. During the processing, the filter device will be clogged. At this time, it can only be shut down to clean it, and then continue to print or reprint. This method will cause the quality of the prosthesis Inconsistencies and increased production costs

Images