Abstract
The additive manufacturing of metal parts takes up an increasing number of areas of mechanical engineering, but it still remains too expensive for mass use. Based on the experience in the production of combined metal-metal-polymer forming parts of molds, a new method for the production of composite parts from a metal shell filled with metal-polymer is proposed. As a basis for the study, strength calculations are given by the finite element method for the details of the exoskeleton and a sample of simplified geometry. Comparison of the strength characteristics of parts made of various materials and their combinations showed high strength characteristics of a composite part made of a metal shell and a metal-polymer filler. The metal-metal polymer composite part is distinguished not only by its high strength but also by a significantly lower cost, due to the reduction in the volume of 3D printing with metal. The problems of obtaining composite structures are also discussed. The main problem is the development of a metal-polymer casting technology. The process of filling a thin-walled shell with a metal-polymer causes difficulty.
Highlights
Accepted: 11 January 2022The development of modern methods and technologies for the production of products is aimed at achieving the maximum manufacturability of the product
The service purpose of the exoskeleton assumes that its parts are subject to total loads W associated with human weight HW, own weight OW, as well as loads from drives DL
The study consisted of comparing the safety factor of parts of the same shape, under the same load, but made of different materials, such as metal, metal-polymer, ABS plastic, as well as their compositions: metal-metal-polymer and ABS plastic–metal-polymer
Summary
The development of modern methods and technologies for the production of products is aimed at achieving the maximum manufacturability of the product. Manufacturability is a combination of product properties that ensure its lowest cost in design, manufacture, operation, and disposal. Within the framework of this study, such a parameter of manufacturability as the cost of production has been identified. The cost of manufacturing of a product depends, in turn, on the cost of designing a product, developing a technological process for its manufacture, the cost of equipment and tooling, a wage fund, etc., as a filler for a 3D printed casing
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