A laser rapid prototyping method for vertical metal thin-wall parts with complex surfaces

Abstract

The invention provides a laser rapid prototyping method for vertical metal thin-walled parts with complex surfaces, which includes establishing a three-dimensional solid model for the thin-walled metal parts with complex surfaces vertically to be formed, and dividing the upper surface of the thin-walled metal parts with complex surfaces into M points to determine The height value of each point; according to the height value of each point, determine the Z-axis single-layer stroke at each point position; obtain the bottom surface profile data of the vertical metal thin-walled part with complex surface; combine the Z-axis single-layer stroke and the bottom surface profile data Import laser rapid prototyping equipment, start the laser rapid prototyping system, and start forming vertical metal thin-walled parts with complex surfaces. The present invention can use the spatial layering method under the condition of 3-axis open-loop, without changing the laser power and scanning speed, and form complex surface vertical metal thin-walled parts by controlling the Z-axis single-layer travel at different positions, which reduces the complexity of the equipment It avoids the discontinuity of the outline of each layer, and the continuous outline path avoids the step effect on the surface of the complex surface vertical metal thin-walled parts, improving the surface quality.

Description

technical field [0001] The invention belongs to the technical field of laser direct manufacturing, and relates to a laser rapid prototyping method for vertical metal thin-wall parts with complicated surfaces. Background technique [0002] Laser rapid prototyping technology is a new additive manufacturing technology that integrates laser technology, CAD / CAM technology and material technology. According to the CAD model of the part, perform layered slicing to obtain the profile of the cross-section of each layer, and then according to these two-dimensional plane profiles of equal thickness, a complex three-dimensional model or a complex three-dimensional model can be manufactured along a certain coordinate direction within a specific time without a specific mold. entity. Laser rapid prototyping technology has the advantages of high material utilization rate, low energy consumption rate, and the ability to form dense prototypes and parts of any complexity. It is widely used in...

AI Technical Summary

Problems solved by technology

At present, in the laser rapid prototyping of such thin-walled parts, the three-dimensional solid is cut into many X-Y plane profiles of equal height, which are superimposed layer by layer along the Z direction. Due to the unevenness of the upper surface of the thin-walled part, the scanning path in the same plane There is a discontinuity, as the number of deposited layers increases, this discontinuity will cause a step effect, which seriously affects the surface quality of thin-walled formed parts

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