Partition scanning method for thin-walled part additional material manufacture

Abstract

The invention discloses a partition scanning method for thin-walled part additional material manufacture. According to all entity areas of layering and slicing of a to-be-machined thin-walled part, inaccordance with the medial axis transformation of the boundary of each entity area, whether the area is divided into a plurality of main areas and a connecting area is determined; scanning paths arecalculated for the main areas and the connecting area, wherein a zigzag scanning path is adopted in the main areas, so that a fused powder material is scanned along a scanning line and a slicing and layering contour line finally through a high energy beam to form a thin-walled part slicing layer entity, so that the whole thin-walled part is formed. The control of a processing process is simple, residual stress and distribution thereof can be controlled, forming errors and buckling deformation of the thin-walled part are reduced, and the density of the thin-walled part and the strength thereofare improved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a partition scanning method for additive manufacturing of thin-walled parts. Background technique [0002] Thin-walled parts refer to lightweight structural parts composed of various thin plates (shells) and ribs, generally made of aluminum alloy, titanium alloy and other materials, which have outstanding advantages such as light weight and high strength, and are increasingly widely used in engineering, especially Thin-walled structures are commonly used in aerospace products. Thin-walled parts are usually processed by turning, milling, grinding, fly-cutting, etc., the material utilization rate is very low, and due to the characteristics of thin-walled parts such as poor rigidity and large machining allowance, the processing technology is poor. Under the action of cutting force, clamping force, cutting chatter and other factors, problems such as deformation, insta...

AI Technical Summary

Problems solved by technology

Using powder bed additive manufacturing technology to form parts, conventional scanning methods mainly include parallel line scanning, checkerboard scanning, equidistant line scanning and other scanning methods. When using these scanning processing methods, due to the high energy beam in a forming layer The difference in the sequence of melting powder and powder cooling and solidification causes a huge temperature gradient, which leads to a large stress in the formed thin-walled parts, which is easy to cause warping and deformation, and cannot satisfy the high-precision, high-performance thin-walled parts. Application Requirements for Component Additive Manufacturing

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