The current development trend of flat grinding is to turn shaping, steps, cuts, fast jitter, and three-dimensional curved surface grinding. It can be said that flat grinding is one of the models with the greatest potential for evolution in grinding machine tools. China's flat-grinding mill should step out of the traditional plane grinding thinking and go to the development of non-planar grinding processes such as curves or contours to further develop our own unique technologies and products.
First, the development trend of surface grinder
1. From the point of view of specifications, mainly small flat grinding. The table width is less than 200mm, which accounts for almost 50%. The transportation and installation of small-sized machine tools are more convenient; foreign flat grinding does not distinguish between ordinary, precision, and high-accuracy precision grades. Relative to small-sized machine tools, the accuracy is easy to do very high; In the market, the potential demand for medium-sized and small-sized flat grinding is large.
2. From a control point of view, more than 70% are numerically controlled, with single-axis, dual-axis, and three-axis numerical control, up to five-axis control, and in particular, large-scale models of 400 or more, all of which are numerically controlled. Due to the change of the function due to the development of the technical level, the flat grinding has changed from the conventional surface grinding to the forming grinding, and the conventional control has been difficult to achieve the function requirements. CNC grinding has formed a market trend.
3. From a functional point of view, more than 50% of flat grinding is not only used for horizontal plane machining, but also for surface grinding operations such as forming, steps, cut-in, rapid vibration, and three-dimensional space curves. For example, ELB and BLM change based on flat grinding. The five-axis linkage grinding center can realize the grinding of non-planar complex curved surfaces; the flexible grinding system of Unison and Trutech can realize the forming, centerless, cylindrical, tool, contour and other grinding processes; The rapid jitter mills of Yufu, Parker, etc., reflect that flat grinding is the most evolutionary potential in grinding machine tools.
Second, the development presents four major changes
1. High-speed, compound, high-precision, and high-rigidity are still the main developments of the gold-cutting machine tools, but there are new changes. Compounding has changed from the original compounding and compounding to practical and efficient considerations, such as the compounding of vehicles, milling and milling, the compounding of vehicles, milling and drilling, and the compounding of milling machines and electric sparks. From a functional point of view, the composite machine tool aims at Very strong, for a certain type of parts to consider; from the accuracy point of view, positioning accuracy <2μm, repeatability of positioning accuracy ≤ ± 1μm machine has been everywhere; from the spindle speed point of view, 8.2kW spindle up to 60000r/min, 13kW up to 42000r /min, High-speed is not a proprietary feature of the low-power spindle; from a rigid point of view, machining centers that can process 60HRC hardness materials have emerged.
2. The modular design has been applied in the manufacture of machine tools. The horizontal, vertical, full-series, and cross-series modular designs, whether Japanese machines such as Otsuka or Makino, or American machines represented by Haas, Cincinnati, etc., look exactly the same in appearance, but their functions are complete. Differently, many modules are common.
3. The fully automatic concept has changed. Traditional automatic machine tools use a pneumatic or hydraulic robot to automatically load and unload workpieces. Now they use real multi-joint robots to achieve workpiece loading and unloading, including stacking of finished parts. . The scope of control was increased, the flexibility of the group lines was strengthened, and the supporting machinery was greatly reduced.
4. Environmental protection requirements are getting higher and higher. Among the exhibited exhibits, most of the machine tool products use fully enclosed housings, and there is absolutely no chipping or splashing of cutting fluid. On the other hand, the display of a large number of industrial cleaning machines and cutting fluid processing systems also reflects the increasing environmental protection requirements of modern manufacturing.
Third, the fundamental lies in design innovation
1. Flat grinding is the machine tool with the greatest potential for development in grinding machine tools.
In addition to the traditional surface grinding function, it can be transformed into a cylindrical, curved, tool, and uncentred grinding machine such as the Kolee Corporation's C1020N2 outer ring based on the flat grinding bed, pallets, table tops, grinding heads and other large parts. The basis of the grinding machine and the B6062PC2 tool grinder is plain grinding. China should complete the development of the flat grinding specification series, and jump out of the traditional plane grinding thinking to the idea of ​​non-planar grinding processing such as curves or contours to further develop and form our own unique technologies and products.
2. Modular design will be a main thread throughout the entire product design process, whether it is the trend of machine tool technology development or the requirements of market competition. Whether it is the need to reduce costs or the need to improve product quality, it requires us to develop and design products in the future. In the meantime, do a good job of modular design.
3. The fundamental point in the development of the world's machine tool industry is the development of design innovation concepts. The traditional metal cutting principle, with a new modern design concept, combined with advanced control technology, is driving major changes in machine tool technology.
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