Abstract
The use of rapid prototyping technologies provides a unique opportunity of cost-effective methods of investment casting to create new industrial products, of particular importance is the cost and speed of production. Development and research of rapid prototyping technologies have allowed a new level of optimization and introduction of new technologies into various industries. The essence of investment casting is that to get the castings use a single, accurate non-split, ceramic shell molds, which are produced on single models using liquid molding compounds. Before pouring the melt, a model shape is destroyed by melting, burning, dissolving, or evaporation. To remove residues of the model and hardening, mold is heated to high temperatures. Calcination form before its filling virtually eliminates gas formation and improves occupancy melt. At the stage of pilot production, which is characterized by frequent changes in design, the problem of the rapid production of cast components becomes crucial. This is mainly due to the complexity of manufacturing foundry equipment. The aim of this work is to identify opportunities and evaluate accuracy of the casting size during investment casting using rapid prototyping technology. The work was conducted with the use of cross-cutting design in CAM / CAD / CAE systems. The work has been verified according to the adequacy of the virtual simulation of the casting formation process in the casting simulation ProCAST, in comparison with those obtained castings. The study showed that the use of rapid prototyping technologies with investment casting can significantly reduce the time for making castings, reduce production costs and improve the accuracy of the casting size.
Highlights
To date, Foundry is one of the main techniques for metal products and preparations for various industries
The correction factor of the photopolymer master model is the sum of the coefficients of shrinkage of wax and metal.In case of using heat-resistant alloy, and the wax model, = 1,5 and = 1.The resulting formula does not take into account the shrinkage of ceramic forms, which constitute about 1%
A tech is the design of the molded part, in which you can make a casting that meets the requirements of accuracy, surface roughness, physical and mechanical properties and structure of the metal with the least expenditure of time and money (Ivanov V.N. et al, 1984) Dimensional accuracy is evaluated by the actual deviations from the nominal size of the casting
Summary
Foundry is one of the main techniques for metal products and preparations for various industries. The main direction of improvement for any production is modernization of the well-known and creation of the new technological processes to reduce material consumption, decrease labor costs and energy, improve working conditions, eliminate or reduce harmful effects on the environment. All this increases the efficiency of production and products (Dimitrov, D. et al, 2006). The process of parts machining at most of engineering companies in the industry take about 70-80% of the total time of their manufacture (Cheah et al, 2005). To save material and time resources for the design, development and manufacturing of products, promising is the use of new technological processes, both in procuring, as well as in the main production (Onuh & Yusuf, 1999)
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