High-speed cutting process for high-speed machining technology is the key. Cutting Methods improper tool will increase wear and tear, will not achieve the purpose of high-speed machining. In order to promote the development of high-speed machining technology, the need for high-speed machining process performance and economical issues in depth. High Speed Machining Technology key technologies, including cutting methods and cutting parameters selection, optimization.
(1) the choice of cutting method
In the high-speed machining, we should try to use cis-milling process, because the cis-milling, the cutter just cut into the chip thickness of the workpiece produced by the largest, and then decrease gradually. On the contrary, when the milling cutter just cut into the workpiece produced by the minimum chip thickness, followed by a gradual thickening, which increases the tool and workpiece friction, where they are needed to generate a large number of heat, so the heat generated in milling milling more than the cis many radial force also increased significantly. Shun-milling the same time, the blade main compressive stress, while in the milling of the blade tension stress, force the state to poor, reducing tool life.
(2) maintain a constant metal removal rate
High-speed machining is suitable for shallow depth of cut, depth of cut should not exceed 0.2/0.2mm (ac / ap), metal removal rate constant, so that added to the workpiece on the cutting load constant, while a constant cutting load, chip size to extend tool life, to ensure better processing quality.
(3) the choice of taking a knife method
For the cavity with an exposure area, as far as possible away from the material outside the knife, cutting the material in real-time analysis of the situation. For the cavity of the enclosed area without using spiral feed manner, cut into the local area. To minimize the tool change to the rapid, high-speed machining the main choice of loop or a single path for cutting.
(4) in the Z direction of cutting plane continuous
Traditional processing method is to use the cavity mold by milling, an increase of this tool cut into the processing method, cut out the number of parts, affecting the quality of the workpiece surface, limiting the power of machine tools and tool play. In the high-speed cutting, they often use a continuous cutting plane Z direction. Use than conventional small step distance, thereby reducing the amount of each tooth cutting removed to improve the quality of machined surface, shortening the processing time.
High-speed machining technology can significantly improve processing efficiency and tool life, and can get very good processing quality, modern manufacturing techniques that have strategic importance. With the expansion of high-speed machining applications, pairs of new research tool materials, tool to improve the structure of NC tool path generation and the new strategy to improve the cutting conditions have also improved. Moreover, the cutting process of the computer-aided simulation have emerged, and the technology tools to predict the temperature and stress, to extend the tool life makes sense. Obviously, as the new technology continues to mature and comprehensive use of high efficiency, high precision and high surface quality as the basic characteristic of the high-speed machining technology applications has become increasingly widespread, and has made significant technical and economic benefits of contemporary advanced manufacturing technology, an important part.