What kind of mold knowledge should I learn when making molds for TV sets? thank you

TV mold is also a kind of mold, so the knowledge of mold is similar. If you have a good knowledge of mold, it will be easy to get a good command of TV. So it is very important to master some modern technologies.

Modern mold manufacturing technology is developing towards accelerating information drive, improving manufacturing flexibility, agile manufacturing and systematic integration. 1. High-speed milling: High-speed milling of the third-generation die-making technology not only has high machining speed, good machining accuracy and surface quality, but also has low temperature rise (the workpiece is only increased by 3℃) and small thermal deformation compared with traditional cutting processing, so it is suitable for processing materials sensitive to temperature and thermal deformation (such as magnesium alloy); Because of the small cutting force, it can be applied to the processing of thin-walled and rigid parts; A series of advantages, such as machining hard materials (HRC6), can be realized by reasonably selecting cutting tools and cutting parameters. Therefore, high-speed milling technology is still a hot topic at present, and it has developed in the direction of higher agility, intelligence and integration, becoming the third generation of modeling technology. Second, EDM milling and "green" product technology From the perspective of foreign EDM machine tools, the performance, process indicators, intelligence and automation have reached a fairly high level. At present, the new trend abroad is to research and develop EDM milling technology (EDM generative machining technology), which is a new technology to replace the traditional machining of cavities with shaped electrodes. It uses simple tubular electrodes rotating at high speed to process three-dimensional or two-dimensional contours (like numerical control milling) Recently, Mitsubishi Corporation of Japan launched EDSCAN8E EDM machine tool and made new progress. This machine can automatically compensate electrode loss. The special CAM system developed for this machine on Windows95 can be linked with general CAD such as AutoCAD, and can be used for on-line precision measurement to ensure high-precision machining. In order to confirm whether the machining shape is abnormal or incomplete, CAM system can also realize simulation machining. With the development of EDM technology, people pay more and more attention to the safety and protection technology of EDM, and many electric machining machines have considered the safety protection technology. At present, the European Union has stipulated that machine tools without the "CE" mark cannot enter the European Union market, and at the same time, the international market is paying more and more attention to the requirements of safety protection technology. At present, the main problem of EDM machine tools is radiation disturbance, because it has a great impact on safety and environmental protection. With more and more attention paid to "green" products in the international market, the "green" product technology of EDM machine tools as the leading equipment for mold processing will be a difficult problem to be solved in the future. Third, the new generation of mold CAD/CAM software technology At present, the mold software developed by Britain, the United States, Germany and some universities and research institutes in China has the characteristics of intelligence, integration and evaluation of mold manufacturability of the new generation of mold CAD/CAM software. The new generation of mold software should be based on a lot of knowledge summarized from mold design practice. After systematic and scientific arrangement, this knowledge is stored in the engineering knowledge base in a specific form and can be easily called by the mold. With the support of intelligent software, mold CAD is no longer an imitation of traditional design and calculation methods, but under the guidance of advanced design theory, making full use of the rich knowledge and successful experience of experts in this field, and its design results are bound to be reasonable and advanced. The new generation of mold software designs the mold structure with three-dimensional ideas and intuitive feelings, and the generated three-dimensional structural information can be easily used for mold manufacturability evaluation and NC machining, which requires the mold software to achieve a fairly perfect degree and a high level of integration in three-dimensional parametric feature modeling, molding process simulation, NC machining process simulation, information exchange, organization and management. The degree of software integration depends not only on whether the functional modules are complete, but also on whether these functional modules use the same data model and form a global dynamic database in a unified way to realize the comprehensive management and sharing of information to support the whole process of mold design, manufacturing, assembly, inspection, testing and production. The evaluation function of mold manufacturability is very important in the new generation of mold software. It is necessary to screen multiple schemes, evaluate the rationality and economy in the mold design process, and provide the basis for mold designers to modify. In the new generation of mold software, manufacturability evaluation mainly includes the estimation of mold design and manufacturing cost, the evaluation of mold assemblability, the evaluation of mold parts manufacturing manufacturability, the evaluation of mold structure and formability, etc. The new generation of software should also have the function of assembly-oriented, because the function of mold can only be reflected through its assembly structure. After adopting the assembly-oriented design method, the die assembly is no longer a simple assembly one by one, and its data structure can not only describe the function of the die, but also define the assembly characteristics of the relationship between the die parts, thus realizing the association of the parts, thus effectively ensuring the quality of the die. Advanced rapid tooling manufacturing technology 1. The rapid development of laser rapid prototyping technology (RPM) has reached the international level in China and is gradually commercialized. The commercialized rapid prototyping technologies in the world mainly include SLA (Stereolithography), LOM (Layered Split Manufacturing), SLS (Selective Laser Sintering) and 3D-P (Three-dimensional Printing). Tsinghua University was the first to introduce the SLA25 (Stereolithography or Laser Curing of Photosensitive Resin) equipment and technology from 3D Company of the United States, and carried out research and development. After several years of efforts, it improved and introduced the "M-RPMS- type multifunctional rapid prototyping manufacturing system" (with layered entity manufacturing -SSM, melt extrusion molding -MEM), which is the only system in the world with independent intellectual property rights in China with two rapid prototyping processes (national patents). 2. Die-less multi-point forming technology is another advanced manufacturing technology, which uses the punch group with adjustable height to replace the traditional die to form the sheet metal surface. The die-less multi-point forming system takes CAD/CAM/CAT technology as the main means to realize the automatic forming of three-dimensional surfaces quickly and economically. Jilin University of Technology has undertaken the national key scientific and technological research project on dieless forming, and has independently designed and manufactured dieless multi-point forming equipment with international leading level. Compared with Massachusetts Institute of Technology, Tokyo University and tokyo institute of technology, this technology in China is in a leading position in theoretical research and practical application, and is now developing towards popularization and application. ? 3. The resin stamping die was successfully applied in the trial production of domestic cars for the first time. FAW Mould Manufacturing Co., Ltd. has designed and manufactured 12 sets of resin moulds for the trial-production of the brand-new small red flag car. These 12 sets of moulds are drawing dies for large-scale complex inner and outer covering parts such as trunk, hood, front, rear, left and right fenders, etc. Its main features are that the mould surface is based on the main model processed by CAD/CAM, and the high-strength resin refined by Swiss Ciba is used for casting. The gap between convex and concave dies is accurately controlled by imported special wax sheets, so that the dimensional accuracy of the mould is high and the manufacturing cycle can be shortened by one-half to one-third. It opens up a new way for car trial production and small batch production in China, which is the first in China. Experts from Ciba Specialty Chemicals in Switzerland believe that it can reach the international level in the 199s. V. On-site mold inspection technology The development of precision molds requires higher and higher measurement. Precise CMM, limited by the environment for a long time, is rarely used in the production site. The new generation of CMM basically has the characteristics of temperature compensation, using anti-vibration materials, improving dust prevention measures, improving environmental adaptability and reliability, so that it can be easily installed in the workshop for use, so as to realize the field measurement. ? VI. Mold surface engineering technology of mirror polishing Mold polishing technology is an important part of mold surface engineering and an important post-treatment process in the mold manufacturing process. At present, the polishing equipment, abrasives and processes for polishing molds to Ra.5μm in China can basically meet the needs, while the mirror polishing equipment, abrasives and processes for polishing molds to Ra.25μm are still in the exploratory stage. With the large-scale application of mirror injection mold in production, mold polishing technology has become a key issue in mold production. Because there are still some problems in domestic polishing technology and materials, a large part of injection molds, such as injection molds for camera lenses, CD, VCD discs and tools with high transparency requirements, still rely on imports. It is worth noting that mold surface polishing is not only affected by polishing equipment and technology, but also by the mirror degree of mold materials, which has not been paid enough attention to, that is to say, polishing itself is restricted by mold materials. For example, when 45# carbon steel is used as the injection mold, when it is polished to Ra.2μm, obvious defects can be seen by naked eyes, and if it is thrown down, the brightness will only increase, but the roughness will be hopeless. Therefore, at present, imported mold materials, such as Sweden's Yishengbai 136 and Japan's Datong PD555, are often used in mirror mold production in China, and satisfactory mirror degree can be obtained.

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