Additive and subtractive composite forming equipment and machining method

Abstract

The invention provides additive and subtractive composite forming equipment and a machining method. The additive and subtractive composite forming equipment comprises a machine box, wherein a workbench is arranged in the machine box, an XY-axis moving mechanism is arranged on the bottom surface of the workbench, a main shaft is arranged in the machine box, the main shaft is connected with a driver, a subtractive forming tool library is arranged on the left side of the main shaft, the right side of the main shaft is provided with an additive forming tool library and a powder feeding laser nozzle, the lower end of the main shaft is provided with a working head, the powder feeding laser nozzle is connected with a laser through a laser optical fiber, the powder feeding laser nozzle is connected with the powder feeding device through a powder feeding tube, the laser powder feeder is connected with the protective gas supply device through a pipeline, and the protective gas supply device is connected with the powder feeding laser nozzle through an air pipe. According to the additive and subtractive composite forming equipment, the efficiency of rapid forming machining and cutting machining is improved, and the machining quality is improved.

Description

technical field [0001] The invention relates to a compound molding equipment and processing method of increasing and decreasing materials. Background technique [0002] Laser fusion rapid prototyping technology retains a series of advantages such as traditional 3D printing, which can realize flexible design and manufacturing, reduce the cost and cycle of product development and manufacturing, and can form complex structural parts at one time. At the same time, compared with other 3D printing technologies for metal parts, the parts formed by laser melting rapid prototyping technology are larger in size, faster in forming speed and higher in powder utilization. However, when laser fusion forming technology is used for processing, there is a layer of dense and hard irregular outer layer flowing on the surface of the part, and there is an obvious step effect on the surface of the part, and the flatness and finish are not high. Post-processing, resulting in large problems in the...

AI Technical Summary

Problems solved by technology

However, when laser fusion forming technology is used for processing, a layer of dense and hard irregular outer layer flows on the surface of the part. There is an obvious step effect on the surface of the part, and the flatness and finish are not high. The resulting metal parts are difficult to process Post-processing, resulting in large problems in the accuracy and surface quality of the obtained parts, which seriously affects the widespread promotion and application of this 3D printing technology in the precision parts manufacturing industry

[0003] At present, the mainstream laser nozzles in the market mostly use multi-channel coaxial light to send powder outside, and adopt the structure of multi-layer powder road ring surrounding the laser beam. In laser rapid prototyping, the light incident route of the powder is the oblique throwing movement route. , the metal powder is obliquely thrown into the laser molten pool, the powder spots converge and are not easy to keep in place, which limits the further improvement of its precision in the part manufacturing process

At the same time, multi-channel coaxial powder cannot completely eliminate the problem of directionality. When the direction of the laser scanning track changes, the amount of powder cladding will change, resulting in large fluctuations in the thickness and height of the formed metal parts, making it difficult to ensure uniformity , this kind of fluctuation cannot be eliminated in the subsequent accumulation, forming the accumulation of errors

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