Die Casting Design and Manufacturing Technology
Although China is casting a big country, but far from strong casting, casting Chinese art, casting quality, technology, and other economic indicators than there is a big gap between the advanced countries. Casting process-oriented approach to sand casting, in which manual, semi-mechanized model still accounts for a large proportion, but the die-casting industry in recent years, China has developed rapidly, maintaining an annual 7% to 10% growth rate. China's auto industry is growing up, in order to reduce vehicle weight, the car's aluminum, magnesium light metal consumption will further increase, which for Die Casting has set a higher quality requirements. China foundry process equipment with the advanced countries are still disparities. In the 1990s before casting mold design of computer use small, mainly manufacturing equipment mainly to the ordinary universal. In the 1990s, huge market demand, particularly in the automotive, motorcycle industry's rapid development has greatly promoted the Chinese die casting industry. At the same time as the joint venture and wholly owned enterprises involved in foreign advanced equipment and mold manufacturing technology to introduce, promote domestic die casting design and manufacturing technology to increase gradually the level of some companies already have large-scale design and manufacture of precision die capabilities, such as FAW Foundry limited Die Casting Company plant design and manufacture of die-casting machine with a set of 3400t of the die-casting molds, with a total weight of 33.5t, is the largest domestic die casting molds.
Since the 1990s, the die casting industry in the design and manufacture of the main changes are:
(1) mold production technology level, high-tech in mold design and manufacturing, has fast become a strong manufacturing quality assurance die. CAD / CAM / CAE applications, shows the use of information technology to enhance and promote the superiority of the mold industry, CAD / CAM / CAE mold has become a universal application of the technology business. CAD / CAM technology has been integrated in the die casting industry in the wider use of the current two-dimensional design software used mainly AutoCAD, three-dimensional design software used by many, the main Pro / E, UG, Cimatron, and so on.
At present, FAW Die Casting factory in 3D design has reached 95% in the three-dimensional design using three-dimensional virtual assembly of the assembly interference detection technology to inspect and ensure the quality of die design to ensure that the design process and reasonable. Three-dimensional data CAM software editor, NC code to be transmitted directly to digital equipment on the processing die. The universal application of CNC machine tools, to ensure that the mold parts of the processing accuracy and quality has greatly improved the accuracy of the molds and production efficiency. CAE technology is gradually applied to the actual design, production, the use of CAE simulation technology of the metal filling process, analysis of the cooling process, forecast in the process of forming a possible defect product development, as well as pre-solidification simulation, greatly optimized the design process and shortens Test of time. FAW Foundry Co., Ltd. Die Casting plant in a number of large and complex molds, such as the engine block, cylinder head, transmission of the shell mold design application of CAE technology has begun to flow field and temperature field simulation analysis, process yield greatly提高.
(2) milling mold cavity is an important means of processing. High-speed processing (High Speed Machining, referred to as HSM) is based on high-speed, high feed and high-speed processing for the quality of the main features of the processing technology, with low temperature rise of the workpiece, the cutting force of small, smooth processing, processing quality and processing efficiency High (for the general milling of 5 to 10 times) and Machinable hard materials (up to 60HRC) and many other advantages, and therefore die in the process of increasing importance. High-speed processing technology into the mold industry, to improve the precision molds, greatly reducing the time to mold manufacturing. Research shows that the general complexity of the mold, HSM processing time can be reduced by 30%.
At present, the die mold enterprises in order to shorten the cycle, improve the competitiveness of the market, using high-speed machining technology more and more. HSM general for large and medium-sized mold processing, such as the automotive panel die, die casting, plastic mold, and other large-scale surface processing, and its precision surface processing up to 0.01mm. Used in the production of high-speed CNC milling technology, could significantly reduce the time tooling. After finishing the high-speed milling die-face, just a little polishing can be used to save a lot of grinding, polishing time.
Increase high-speed CNC milling machine, die business investment in equipment is one of the key points.