How strong is the Swiss machine? Why can the precision of a machine tool be world-class? Accuracy, we all know that the machining accuracy of the machine tool will only deteriorate, but not increase. For example, a machine tool with an accuracy of 0.01mm can only process workpieces with an error of more than 0.01mm. Under such conditions, if you want to make a high-precision machine tool, you need to use machines with higher accuracy for processing, as higher-level machine tools are produced. ?
When it comes to high-precision machine tools, many people think of Germany and Switzerland. How powerful are Swiss machines? For a long time, Swiss machine tool exports were among the top five in the world. , the world's first record, more than 150 countries are customers of Swiss machine tools, especially precision machine tools, which are very popular all over the world. As one of the German-speaking countries, Switzerland has always followed the strict and serious "craft spirit" of German-speaking countries, constantly striving for excellence in There was once a Swiss boss who showed everyone the drawing of the machine, but no one dared to imitate it, because the key parts, processes and spare parts were made by hand.Some people may have doubts why this is not an organic machine? what about without machines?
You need to know that the accuracy of the machines cannot exceed the accuracy of the original machines. Regardless of human factors, if you want to produce ten micron machines with machine tools, you must use 1 micron or higher. Machine tools are only good, so machine tools processed on the assembly line do not have to be as precise. Real high-precision machine tools are all hand-polished bit by bit. The American space telescope is hand-polished, and the lithographic machine. the world is also handmade,
According to current data, every Rolls-Royce is carefully polished by 60 hands before leaving the factory, and after 450 hours of continuous polishing by craftsmen, it is finally delivered to consumers. Rolls-Royce engines are still in production today. by hand, especially the front radiator grille is processed by working hands and eyes without any instrumental measurement, and high-precision machine tools are also built on the original on the machine, after repeated grinding and fitting by hand and eye, the standard system is finally formed, and the new standard is used to eliminate the old standard.
That's why we can always see the technicians at the Swiss factory scratching with a knife. If you just look at the appearance of these blanks, you will definitely not see anything. Usually, technicians apply a coloring agent. Apply it to the machine part, and place it on the plane of the tool to reveal the place to be raked. Repeat this action several times, and the surface of the workpiece will get closer and closer to the stock fixture, and finally, it will reproduce the same work perfectly. As with a standard fixture, typically these blanks are first milled to close to thousandths, then sent for heat treatment to relieve residual pressure, and then sent to a technician for grinding. takes a long time, grinding can replace the manufacturing cost of high-precision machine tool. More importantly, when the workpiece has high requirements, even high-precision machine tool processing must consider human factors, such as: large bed castings, a series of heavy pressing operations is usually required. When precision reaches one thousandth, the workpiece will be deformed due to the release of clamping force, which will affect the accuracy of the workpiece.
During machining, the heat generated by the workpiece also causes deformation of the workpiece. Currently, hand sanding can replace tasks that a machine tool cannot do. This is also the biggest advantage of hand sanding. do not have clamping force, not to mention that they will generate heat, therefore, as a rule, the accuracy of hand-held workpieces is much higher than that of machine tools. For example: in the early days, we did not have CNC machines, and we could not process ideal Archimedes spirals for processing submarine propellers. How to do it? It's all hand-polished by workers and finished with imitation machines. Therefore, high-end machines often require the most primitive manufacturing methods. This is one of the fundamental reasons why Swiss machinists never use machines and opt for pure manual work. made.
Generally speaking, Swiss machine tools are so successful thanks to the spirit of Swiss craftsmen, from small clocks to large machines. Thanks to these people, such famous brands as Mikron, Starrag and Tonas appeared in Switzerland. . Although Switzerland has a small land area and a lack of natural resources, Switzerland is the most developed country in the world. With their own hands, they endlessly improved precision, and then sold precision machine tools to the world. I believe that in the future, the precision of machine tool manufacturing will improve. We can also create more miracles with our own hands.