The key position of technology in the manufacturing industry, rapid development, especially the rapid development of metal mold technology development research is highly concerned, summarizing the key issues and development trends of the technology has the following characteristics:
(1) The use range of fast soft molds and ceramics is limited. The rapid manufacture of metal molds for die-casting, injection molding, stamping, etc. is the goal of RPN technology;
(2) The indirect method combining various prototypes such as rapid prototyping and casting, spraying and other techniques is superior to the direct method. However, due to the increase of the process and the influence of the material properties and the manufacturing environment, the accuracy control is difficult. Big. Developing a mold material with good dimensional stability, reducing the molding process, and realizing the stability of the working environment are the key to improving the accuracy of indirect method molding;
(3) The direct molding method based on the stacking forming principle is difficult to meet the requirements for durable mold manufacturing with high precision and high surface quality in terms of surface and dimensional accuracy and comprehensive mechanical properties, and the cost is high and the size specifications are limited. The integration of stacking and removal forming techniques at low cost and suitable for fine processing and multi-material forming will be an effective method to improve the practicality, material adaptability and surface precision of direct molding;
(4) The rapid modeling method is suitable for China's national conditions and has broad application prospects. Compared with high-speed milling, it has an advantage in the manufacture of metal molds with fine complex shapes and EDM that are difficult to omit. To further improve the competitiveness of rapid tooling technology, it is necessary to develop processing data to generate a new method of direct and rapid molding that is easier to generate than CNC machining data and to obtain a wide range of material sizes and surface precision.
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