Selective laser melting and laser shock strengthening composite additive manufacturing equipment and method

Abstract

The invention provides selective laser melting and laser shock strengthening composite additive manufacturing equipment and method, and belongs to the technical field of advanced manufacturing. The additive manufacturing equipment comprises a workbench, a forming cylinder and a preset number of machining assemblies, and the forming cylinder is arranged on the workbench and used for laying a metal powder layer; the preset number of machining assemblies are arranged over the forming cylinder side by side in the horizontal direction; and each machining assembly comprises two machining unit arrays arranged in parallel, and can output continuous optical fiber laser used for selective laser melting or nanosecond pulse optical fiber laser used for laser shock peening to the surface of the forming cylinder. According to the method, selective laser melting forming and laser shock peening treatment can be carried out at the same time, the technical bottleneck that synchronous implementation is difficult in the prior art is broken through, and the forming size and the forming efficiency of selective laser melting and laser shock peening composite additive manufacturing are greatly improved.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, and more specifically, relates to laser selective melting and laser shock strengthening composite additive manufacturing equipment and methods. Background technique [0002] Selective laser melting (SLM) technology is the mainstream technology for additive manufacturing of metal parts at the present stage, and its process steps can be summarized as follows: i) laying a layer of metal powder on the surface of the substrate inside the forming cylinder; ii) vibrating The mirror applies laser scanning to the metal powder layer according to the digital slicing model of the metal part, and the metal powder in the laser scanning area melts rapidly and solidifies and accumulates to form the part forming layer; iii) The substrate drops to a certain height; iv) Re-lay on the surface of the part forming layer Put a layer of metal powder; v) repeat steps ii), iii), and iv) until the additive ...

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Problems solved by technology

[0007] Aiming at the defects of the prior art, the object of the present invention is to provide a laser selective melting and impact strengthening composite additive manufacturing equipment and method, aiming to solve the problems existing in the existing laser selective melting and laser shock strengthening composite additive manufacturing technology. The forming size is small, the laser selective melting forming and laser shock strengthening treatment of the same metal part are difficult to synchronize, the forming efficiency is low, and the equipment structure is complex, etc.

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