Knowledge Graph Learning for Vehicle Additive Manufacturing of Recycled Metal Powder

Abstract

Research on manufacturing components for electric vehicles plays a vital role in their development. Furthermore, significant advancements in additive manufacturing processes have revolutionized the production of various parts. By establishing a system that enables the recovery, processing, and reuse of metal powders essential for additive manufacturing, we can achieve sustainable production of electric vehicles. This approach holds immense importance in terms of reducing manufacturing costs, expanding the market, and safeguarding the environment. In this study, we developed an additive manufacturing system for recycled metal powders, encompassing powder variety, properties, processing, manufacturing, component properties, and applications. This system was used to create a knowledge graph providing a convenient resource for researchers to understand the entire procedure from recycling to application. To improve the graph’s accuracy, we employed ChatGPT and BERT training. We also demonstrated the knowledge graph’s utility by processing recycled 316 L stainless steel powders and assessing their quality through image processing. This experiment serves as a practical example of recycling and analyzing powders using the established knowledge graph.

Sustainable Decision Model for Circular Economy towards Net Zero Emissions under Industry 4.0

“…If ρ 1 is 1, then ρ 0 , ρ 2 , ρ 3 in Function ( 22) are 0. Therefore, Function (19) shows that the company's total carbon emissions fall on (CEQ 0 , CEQ 1 ), and the cost of the carbon tax shows that the cost is TR 1 (ϕ 1 − CEQ 0 ). TRi is the carbon tax rate based on the carbon emissions falling on the i-th segment.…”

“…If ρ is 1 then ρ , ρ , ρ in Function ( 22) are 0. Therefore, Function (19) shows that the company' total carbon emissions fall on (CEQ0, CEQ ), and the cost of the carbon tax shows that the cost is TR (φ − CEQ ). Models 1 and 3 only need to consider the cost of the carbon tax, so their carbon emis sions must not exceed the allowable upper limit set by the government, and this uppe limit can be expressed by Function (24).…”

“…Functional water-repellent and waterproof treatment of various types of fabrics, automatic weaving of shoe uppers, and recycling of old shoes and waste raw materials are all important issues in the circular economy. In addition, the circular economy can be applied in various industries [18][19][20].…”