Reinforcing device and method for selective laser melting added material manufactured components

Abstract

The invention relates to a reinforcing device and method for selective laser melting added material manufactured components. The reinforcing device comprises a platform, a forming chamber positioned above the platform, and a forming cylinder and a powder holding cylinder positioned under the platform; an upper port of the forming cylinder and an upper port of the powder holding cylinder communicate with the forming chamber; the forming chamber is provided with a laser generation system right above the forming cylinder; the laser generation system comprises a laser probe for selective laser melting, and a laser probe for laser shot blasting; a first base plate and a second base plate capable of moving up and down are arranged in the forming cylinder and the powder holding cylinder; and a forming substrate is arranged above the first base plate. The reinforcing method adds the laser for laser shot blasting in the vacuum forming chamber 4, so that selective laser melting added materials and laser blasted shots alternately work, and components are reinforced at the same time in the forming process; and in addition, the reinforced components are directly heated in the forming chamber 4,so that internal stress in the forming process is reduced, and the mechanical performances of the added material manufactured components are improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing strengthening, and in particular relates to a strengthening device and method for laser selective melting additive manufacturing components. Background technique [0002] Selective laser melting (SLM Selective laser melting) technology is a technology that uses metal powder to be completely melted under the heat of a laser beam, cooled and solidified to form a shape. Under the action of high laser energy density, the metal powder is completely melted, and can be formed by metallurgical welding with solid metal after heat dissipation and cooling. SLM technology is a rapid prototyping technology that accumulates layers of three-dimensional solids through this process. [0003] However, in the process of selective laser melting, due to the superimposed heat input, severe tensile stress will be generated inside and on the surface of the additive manufacturing component, which will redu...

AI Technical Summary

Problems solved by technology

The above two methods can control the tensile stress inside and on the surface of the additive component, but they cannot strengthen the laser selective melting additive manufacturing component. In addition, after the laser selective melting part is taken out from the forming cavity, a separate heat treatment is carried out. It not only wastes time and reduces production efficiency, but also causes cracking due to untimely heat treatment

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