mould design

Continue to improve the efficiency of the EDM, surface integrity of the degree of automation and processing;

　　 * EDM precision equipment and large;

　　 * EDM equipment processing stability, easy operation and excellent performance and low cost;

　　 * Research and development of energy-efficient to meet different requirements and anti-electrolysis new pulse power, the power waveform detection and treatment and control technology development;

　　 * Research and development of high-performance integrated expert system technology continues to evolve and EDM intelligent and adaptive control, fuzzy control, multi-axis control, automatic exchange electrode, two-lane automatic switching anti-electrolysis and discharge energy distribution technology development;

　　 * Powder mixed processing mirror light processing technology development;

　　 * Development of micro EDM technology, including three-dimensional micro-contour CNC EDM milling and micro-EDM grinding and micro EDM technology;

　　 * WEDM in the use of artificial intelligence techniques, to go wire systems, and wear silk technology improvements;

　　 * EDM milling technology and machine tools and EDM machining centers (including molding machine and cutting machine) will be developed;

　　 * As a strategy of sustainable development, green EDM new technology is an important development trend in the future.

Rapid prototyping and manufacturing (RPM) and rapid tooling (RT) technologies

Mold for stamping parts the future of the largest competitive factors, how to quickly create a user needed to mold. The RPM technology may directly or indirectly for the RT. Metal mold rapid manufacturing technology goals, direct manufacturing can be used for the industrial production of high-precision of durable metal hard mold. Indirect legal mold technology is the key to the development of the short process technology to reduce the loss of accuracy, cost-laminated and surface finishing technology integration. The combination of the RPM technology with RT Technology, is the traditional rapid tooling technology (such as the low melting point alloy casting, spraying, electroforming, casting, layer, rubber poured solid, etc.) in the direction of further development. RPM technology and ceramic precision casting precision casting mold cavity forming a new way. Application the RPM / RT technology, the concept from mold design to fabrication, only about 1/4 of 1/3 of the time and cost required to the traditional processing methods, and has broad prospects for development. RT technology to further improve the competitiveness, the need to develop the data and processing the data easier to generate, high precision, small size and material restrictions direct rapid manufacturing of metal mold.

Ultra-precision machining, micromachining and composite processing technology

With the mold to provide the precision and direction of large-scale development of ultra-precision machining, micromachining and collector, chemical, ultrasonic, laser technology will be developed in one of the complex processing. Ultra-precision machining achieve submicron nano-precision ultra-precision machining technology has also been applied to the production. Electric machining, electrochemical machining, beam machining and other processing technology has become an important part of the microfabrication technology, the Global more with a wavelength of 0.5 nm radiation wave manufacturing a nano-grade plastic mold tooling. A machine combining laser milling and high-speed milling, mold processing technology has been a new development.

Advanced surface treatment technology

Mold heat treatment and surface treatment, is the key to the ability to give full play to the performance of the mold material. Vacuum heat treatment, cryogenic treatment, including vapor deposition PVD and CVD (TiN, TiC, etc.), the ions penetrate, such as plasma spraying, and TRD surface treatment technology, diamond film covering technology, high wear-resistant high-precision processing technology, no adhesions surface processing technology in the mold manufacturing applications, and presents good prospects for development. Technical and other mold surface of the mold surface laser heat treatment, welding, strengthen and repair to strengthen and repair techniques, and will also be subject to further attention.

Mold polishing

Mold polishing still mainly manual, inefficient, labor-intensive, unstable quality. China has introduced a CNC grinding machine can achieve a three-dimensional surface mold Auto Polishing own study of humanoid intelligent automatic polishing techniques have certain results, but few current applications are expected to be developed. Should continue to pay attention to the development of special grinding and polishing techniques, such as extrusion honing, of laser honing and polishing, EDM polishing, electrochemical polishing, ultrasonic polishing compound polishing technology and process equipment.

Mold manufacturing technology, including the design and processing, the paper analyzed from both the technical development direction of China's mold industry. The article pointed out that the CAD / CAE, CAPP and KBE first mold design technology trend; access to explore the development direction of the mold processing technology, such as high-speed milling, EDM, rapid prototyping made ​​rapid mold and other. Finally, analysis of the prospects of the mold-made integrated technology.

From a technical point of view, the mold manufacturing (including design and processing) technology can be broadly divided into five stages of development: manual operation stage, the stage of manual plus mechanization (ordinary general machine tools), digital control stage, computerized stage and CAD / CAE / CAM information network technology integration stage.

China has a vast territory, large mold manufacturing enterprises, technology development levels, at all stages coexist, but mainly digitally controlled phase-based, some the backbone key enterprises have developed computerized stage. But at the same time there are many enterprises still remain in the manual plus mechanized stage. Purely manual stage basically has become history, CAD / CAE / CAM integration phase of the horizon of information network technology. Most mold manufacturing enterprises, the future direction of development should be to improve the level of numerical control and computerized-based, active use of high-tech, gradually moving towards the integration of CAD / CAE / CAM information network technology. Mold the paperless manufacturing will gradually replace the traditional design and processing.

Mold design and technology development direction

Mold design have long relied on the experience and mechanical drawing. Since the 1980s the development of mold computer-aided design (CAD) technology, this technology has been recognized, and to fast development. The nineties began development of mold technology of computer-aided engineering (CAE), now also for many enterprise applications, it shortened the mold manufacturing cycle and improve the quality of the mold have a significant role. Some industrial countries the mold enterprise applications CAD technology, from two-dimensional design development to the three-dimensional design, three-dimensional design has reached more than 70%. Most Chinese enterprises still remain on the level of the two-dimensional design, three-dimensional design companies less than 20%. CAE software abroad more common domestic applications is still relatively small, used to predict parts forming process defects may occur in the level is still relatively low.

Mold design and CAD and CAE software, should raise the level in the following aspects:

　　 * Mold design database and knowledge-based systems;

　　 * The mold engineering planning and design;

　　 * Mold material and reasonable choice of standard parts;

　　 * Mold rigidity, strength, flow channel and the design of the cooling passage;

Plastic mold plastic forming process simulation analysis (injection molding, plastic mold filling, packing, cooling, warpage, shrinkage, fiber orientation simulation analysis), the analysis of the thermal conductivity and cooling process, solidification and structural stress analysis. The calculated gating system and mold cavity pressure field, temperature field, velocity field, shear strain rate field and shear stress field distribution and analysis of the results is very complex and time-consuming. This simulation technology from surface flow technology development to the two-sided flow technology, and soon both right and quickly entity streaming technology can be developed to produce to meet the plastic pieces of virtual manufacturing requirements of the three-dimensional the injection flow simulation software;

　　 * The die metal forming process simulation, wrinkling and rupture analysis, stress-strain and springback analysis;

　　 * Die-casting mold casting forming flow simulation, heat transfer and solidification analysis;

　　 * Forging die forging forming process simulation and metal flow and filling analysis;

To improve the design and analysis software, intelligent and integrated level, and to strengthen their capabilities to adapt to the continuous development of the mold.

In addition to mold CAD / CAE technology, mold process design is also very important. Computer Aided Process Planning (CAPP) application technology has begun to mold companies in China. As most of the molds are single-piece production, the process rules different from the mass-produced products, the technical difficulty of the application of CAPP CAPP software for all types of mold and mold companies also difficult. CAPP technology application in order to better mold companies must be prepared to develop and research. Although CAPP technology application and promotion of difficulty is higher than the CAD and CAE, but also must pay attention to the direction of this development.

Knowledge-based engineering (KBE) technology is an important tool of modern design-oriented decision-making automation has become an important way to promote the engineering design intelligent attention in recent years, will mold the smart, optimizing the design to have an important impact.

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