HEIDENHAIN iTNC 530 CNC system and high speed mold processing
introduction
High-speed machining (HSM or HSC) is an advanced processing technology that was rapidly developed and applied in the 1990s. It usually refers to milling with high spindle speed (10,000-100,000r/min) and high feed rate (40m-180m/min). High-speed machining can solve the processing problem of new materials in practical applications, adapt to three-dimensional surface processing with high surface quality, high precision and complex shape, reduce and avoid low-efficiency EDM, solve the processing problem of thin-walled parts, CNC high-speed compounding The processing can also reduce the number of handling and clamping, avoid processing errors caused by repeated positioning, etc., which not only improves the processing quality, but also improves the processing efficiency. High-speed machining technology is gradually applied to the processing of cast iron and hard aluminum alloys, especially for processing large-size stamping stamping die, forging die, die-casting die and injection die. At present, the international high-speed cutting technology is mainly used in the processing of complex curved surfaces such as mold, aerospace and automotive industries. The research and application of domestic high-speed machining technology began in the 1990s. It is also mainly used in the mold, aerospace and automotive industries, but the high-speed cutting CNC machine tools, high-speed cutting tools and CAD/CAM software are mainly imported.
High-speed machining generally uses high milling speeds and fast multiple passes to increase efficiency, small diameter tools, proper feed, small radial and axial depth of cut, ie cutting volume. With the increase of milling speed, the machining time is greatly shortened, and the cutting force is reduced, the vibration is small, especially the radial cutting force is greatly reduced, and the deformation of the part is small. Since a large amount of cutting heat is taken away by the chips during cutting, the surface of the workpiece The temperature is lower. Due to the above characteristics of high-speed milling, high-speed machining has outstanding advantages over conventional machining: high productivity, smooth operation, high surface quality, no need for other surface treatment processes, favorable processing of thin-walled parts and high strength, high hardness and brittleness. Materials, can shorten the delivery time, reduce the number of equipment and workshop area, reduce the number of workers. Despite the increase in initial equipment investment costs, the overall benefits of the high-speed milling process are still significantly improved.
1 High speed machining and mold making
At present, plastic molds are becoming more and more sophisticated, and the structure is more and more complicated. The required number of mold clamping is close to and exceeds 800,000 times. The hardness of the mold steel used is getting higher and higher, and some even exceed HRC 64, and the delivery of molds. The demand is getting shorter and shorter. These market characteristics have put tremendous pressure on mold manufacturers. The emergence of high-speed machining technology has brought new development opportunities for mold manufacturing, especially in the processing of small and medium-sized precision plastic molds.
Most mold materials are high in hardness and wear resistance, and their processing is difficult. Conventional processes are widely formed by EDM micromachining, which is extremely inefficient. High-speed machining technology has a huge impact on the mold processing technology. It has changed the complex and lengthy process of “electric spark→polishing†used in traditional mold processing, and even replaced all the original processes with high-speed cutting. In the processing of high-hardened steel parts (HRC45~65) of the mold, high-speed cutting can replace the process of electric machining and grinding and polishing, avoiding the manufacture of electrodes and time-consuming electromachining time, and high-speed machining technology can be applied. In addition to direct processing of hardened mold cavities (especially semi-finishing and finishing), it has also been widely used in EDM electrode processing and rapid prototyping. Mass production practice shows that the application of high-speed cutting technology can save about 60%-100% of the manual polishing time in the subsequent processing of the mold, can also reduce the EDM process and time, save the processing cost by nearly 30%, and the tool cutting efficiency can be doubled. This kind of savings has been reflected in many foreign mold manufacturers.
High-speed milling of the mold, not only can use high speed, large feed, and rough, finishing once completed, greatly improving production efficiency. The high-speed cutting and hardening steel mold has a hardness of 60HRC or more and a surface roughness of Ra0.6μm, which achieves the level of grinding processing. The efficiency is several times higher than that of electric machining, which not only saves a lot of light repair time, but also replaces the vast majority. Part of the electrical processing process.
2 High-speed machining requirements for CNC systems
High-speed machining is an advanced and complex system engineering technology. Compared with traditional machining technology, it has high requirements for many indexes such as machine tools, tools, tool holders, machining processes, control systems, and CAD/CAM software. . Due to the speciality of mold processing and the characteristics of high-speed machining technology, the high-speed machining process system (machining machine tools, numerical control systems, tools, etc.) has higher requirements than traditional mold processing.
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1.Products details of food grade nylon and polyester wire mesh:
1).High tension and smooth surface
2).Good diathermancy
3).High air permeability
4).Acid resistance and Alkali resistance
5).Long working life
6). Hard wear and easy cleaning
2.Dimensions and shape of Food grade nylon and polyester wire mesh: round,
square,rectangle,different size and different shape mesh pieces can be offered.Small width mesh rolls can be make to order. Samples available under freight burden by buyer, the cost refund after order is fixed.
3.Filtration rates of Food grade nylon and polyester wire mesh: fine mesh screen from 27% to 78%. Such as food industry for milling filtering and flour milling, milling and other grains milling. Like glucose production, milk powder, soybean milk coffee,tea etc.
4.Packaging Details of Food grade nylon and polyester wire mesh:
standard export packaging,paper tube,pvc bag,carton and sail cloth; custom packing available at request.
Nylon Filter Mesh Disc,Nylon Steel Wire Mesh Filter Disc,Nylon Mesh Filter Discs,Micron Mesh Nylon Filter Discs
Anping County Comesh Filter Co., Ltd , http://www.comeshfilter.com