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Abstract: Many disadvantages exist in the traditional die design method which belongs to serial pattern. It is well known that heat treatment is highly important to the dies. A new idea of concurrent design for heat treatment process of die and mould was developed in order to overcome the existent shortcomings of heat treatment process. Heat treatment CAD/CAE was integrated with concurrent circumstance and the relevant model was built. These investigations can remarkably improve efficiency, reduce cost and ensure quality of R and D for products. Key words: die design; heat treatment; mould Traditional die and mould design, mainly by ex- perience or semi-experience, is isolated from manu- facturing process. Before the design is finalized, the scheme of die and mould is usually modified time and again, thus some disadvantages come into being, such as long development period, high cost and un- certain practical effect. Due to strong desires for precision, service life, development period and cost, modern die and mould should be designed and manu- factured perfectly. Therefore more and more advanced technologies and innovations have been applied, for ex- ample, concurrent engineering, agile manufacturing, virtual manufacturing, collaborative design, etc['-''. Heat treatment of die and mould is as important as design, manufacture and assembly because it has a vital effect on manufacture, assembly and service life. Design and manufacture of die and mould have progressed rapidly, but heat treatment lagged seri- ously behind them. As die and mould industry de- velops, heat treatment must ensure die and mould there are good state of manufacture, assembly and wear-resistant properties by request. 32661
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Impertinent heat treatment can influence die and mould manufac- turing such as over-hard and-soft and assembly. Traditionally the heat treatment process was made out according to the methods and properties brought forward by designer. This could make the designers of die and mould and heat treatment perge from each other, for the designers of die and mould could not fully realize heat treatment process and materials properties, and contrarily the designers rarely un- derstood the service environment and designing thoughtC6'. These pergences will impact the pro- gress of die and mould to a great extent. According- ly, if the process design of heat treatment is consid- ered in the early designing stage, the aims of short- ening development period, reducing cost and stabili- zing quality will be achieved and the sublimation of development pattern from serial to concurrent will be realized. Concurrent engineering takes computer integra- tion system as a carrier, at the very start subsequent each stage and factors have been considered such as manufacturing, heat treating, properties and so forth in order to avoid the error. The concurrent pattern has dismissed the defect of serial pattern, which bring about a revolution against serial pat- tern. In the present work, the heat treatment was in- tegrated into the concurrent circumstance of the die .ind mould development, and the systemic and pro- found research was performed. progress of die and mould and the market fore- ground. Whereas in the concurrent pattern, the re- lations among departments are close, the related de- partments all take part in the development progress 1 Heat Treatment Under Concurrent Circum- of die and mould and have close intercommunion stance