Forming method of high-reliability columnar supporting structure for metal additive manufacturing

Abstract

The invention relates to a forming method of a high-reliability columnar supporting structure for metal additive manufacturing, and belongs to the field of rapid forming. The forming method comprisesthe following steps that 1, three first-order main body rods are formed in the vertical direction; 2, three second-order main body rods are formed, and four first branch structures are formed; 3, a second branch structure is formed on the first branch structures at the topmost end in the axial direction; 4, a third branch structure is formed, and a fourth branch structure is formed, and an intersection point of the third branch structure and the fourth branch structure is defined as an intersection point; 5, thin supporting rods are formed at the tops of the three second-order main body rods and the tops of the two intersection points; and 6, n columnar supporting structures are sequentially arranged, the thin supporting rods are distributed in a 5*n mode, and the thin supporting rods areused for supporting external parts. The forming method has the advantages of being difficult to deform in the forming process, low in material consumption and easy to remove.

Description

technical field [0001] The invention belongs to the field of rapid prototyping, and relates to a high-reliability columnar support structure forming method for metal additive manufacturing. Background technique [0002] When metal additive manufacturing forms metal parts, it is often necessary to add support structures. Currently commonly used support styles include solid support, grid support and columnar support. In the process of laser selective melting and forming, solid supports often need to grow upwards from the substrate surface in a large area to ensure the firmness of the bottom of the support. Because the contact surface with the part is too large, it is difficult to remove this type of support, which affects the surface of the part. quality. Moreover, the use of solid supports also has disadvantages such as waste of materials and long processing time. Due to the weak strength of the grid support, it is prone to defects such as collapse and damage under the act...

AI Technical Summary

Problems solved by technology

However, this type of support also has disadvantages: 1. The powder in the support is difficult to clean and recycle, and it is easy to cause waste of raw materials; 2. The removal of the support is poor, and the support is not easy to remove after the part is formed, which increases the difficulty of post-processing.

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