Functional Prototype for the Validation of the Innovative Metal Additive Manufacturing SLEDM Process

Abstract

Additive manufacturing has found its way into industrial series production. However, market growth has only been possible through the introduction of new AM-technologies and the continuous improvement of existing processes. This contribution covers the practical implementation of a prototype for research and validation of the unique SLEDM process patented by TU Graz. The demonstrator includes a feature for powder coating for the melting process as well as the concept of power input via an LED-based light source. The prototype enables a now simple and fast melting of different low-melting powder materials, such as tin, zinc, and aluminum, within an inert gas atmosphere. In addition, the experimental setup forms the basis for the development and adaptation of a suitable light source for the next generation SLEDM process. The goal is to test the additive manufacturing concept with the innovative LED light source and analyze the produced metal parts. The evaluation of the recorded measurement data and the analysis of the test results provide important knowledge about the potential of the SLEDM process for further research and industrial manufacturing. In the future, the individual control of the LED-cells in the matrix can be utilized for optimized temperature profiles in the melting zone and for the reduction of the energy demand of the machine. Overall SLEDM helps to fulfil the targets of sustainable production addressing both the material and energy aspect.