Research On Cold Extrusion Process Design System And Its Key Technologies

Metal forming is a kind of process to form billets into parts with proper shapes, dimensions and mechanical properties, under huge energy and load by utilizing the plasticity of metal materials. Not only can parts with complicated shapes be formed, but the mechanical properties can be promoted after metal forming. Therefore, metal forming plays a great role in national economy, and it is widely used in industries. Nowadays, in order to reduce the subsequent machining and the product cost, metal forming is developed forwards net forming or near-net forming. Cold extrusion process is one of the most important processes of net or near-net forming. The industrial competition is becoming more and more drastic. High quality and efficiency, low cost of product and energy, net forming or near-net forming, environment protection and sustainable development have been becoming the key factors for the manufacturer to win the competition. Cold extrusion process can meet the requirement of economy, technique and society in a certain degree. Hereby, how to establish the cold extrusion processes with high quality and efficiency, and how to design and manufacture high quality extrusion dies, have become the pivotal core of the cold extrusion processes.As we all know, process design is the basis of die design. Multi-stage extrusion is often needed in forming complicated parts, so it is the key work to design proper cold extrusion processes. Basically, the cold extrusion process design undergoes three main phases: traditional handcrafted design, computer-aided design and intelligentized design, now the center of research is transferring to the intelligentized design (knowledge-based design). Research on intelligentized design is interrelated to the development of computer hardware and software artificial intelligence and database techniques. It has two main problems to be solved in the process of applying artificial intelligence technique into process design, the first is domanial knowledge expression,...