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How Is High Precision Equipment Made

Jun 26, 2019

The most important concept of manufacturing is precision. There are two concepts in it, one is machining accuracy and the other is measurement accuracy. How to reflect the size required by the designer is the machining accuracy, and how to know the size of the machining is the measurement accuracy. Both of these precisions are directly dependent on the accuracy of the working machine of the processing machine or measuring machine. The machining accuracy of mechanical equipment will only be lost without increasing. The 1/100 mm precision machine can only process workpieces with an error of 1/100 mm or more, so even if the assembly error is not considered, the medium machining accuracy is used. Machines assembled with machined parts can only achieve lower precision. To produce parts assembled into medium-precision machines, they can only be manufactured using high-precision machining machines. According to this principle, to manufacture high-precision machining machines, only ultra-high-precision machining machines can be used. This raises a question: how the so-called "ultra-precision machining machinery" is manufactured and manufactured. The answer may be surprising. “Ultra-precision machining machines” are made by hand. When it comes to "precision", it is reminiscent of the technical terms of "computer" and "digital". In fact, precision has nothing to do with fashionable nouns. Before the buzzwords appeared, humans can achieve high precision. It is. The most important influence on the precision of the machining machine is the rail portion. The moving part of the machine is limited by the guide rail, and the accuracy of the guide rail directly determines the accuracy of the mechanical movement. The sliding surface of the ultra-precision mechanical guide is called "absolute plane" and requires an accuracy of 1/10000 mm or more. There is no mechanical machine capable of machining such an absolute plane, and it can only be processed by hand. Anyone who has seen the sliding surface of a high-precision machine tool guide knows that the so-called "absolute plane" is not a smooth mirror, but a plane that is spread over a regular pattern. Those patterns are the blades of the craftsman who made this plane. Traces underneath. The absolute plane manufacturing process is this: an experienced craftsman slashes the rough-finished plane with a blade and shovel the desired plane while still making a contrast plane and then applying it on the control plane. The upper color slides the processing plane on the control plane. At this time, the portion on the processing plane that is stained with the color on the control plane is the portion that is higher on the two planes, and needs to be shoveled again. Repeatedly, until the color of the two planes is completely uniform, the knife marks left on the plane just serve as the lubricating oil tank, killing two birds with one stone. But this is not an absolute plane, because if the same curvature is formed between the two faces, the same effect will be produced. This is just that the two faces are exactly the same and cannot be guaranteed to be flat, so another reference plane is needed. . In general, when machining an absolute plane, it is necessary to process three planes at the same time. When any two of the three planes are identical, the absolute plane is calculated. The companies that use the absolute planes required to process machinery in this process are mainly in Germany, Switzerland and Japan, which is why these countries are able to produce high-precision machinery. This kind of precision processing company in Japan is mainly concentrated in the area around the 43 degree north latitude of Niigata Prefecture. There are meteorological reasons. The Japanese craftsmanship was learned from the Germans. At that time, when the government selected the address of the precision processing industry, the climate was selected to be similar to the 43 degree north latitude in Germany. The humidity is small and the temperature is around 20 degrees Celsius, which is most suitable for precision machining. At that time, there was no air-conditioning equipment. It is unthinkable to install air-conditioning equipment in the production workshop. Therefore, the temperature difference must be noticed when processing the site. The material expansion and contraction caused by the temperature difference has a great influence on the manufacture and assembly of precision products. The temperature difference not only affects the workpiece, but the bed of the ultra-precision grinder that I have seen does not use ordinary cast iron, but uses granite to reduce the influence of temperature difference. These companies are basically small companies with several people to dozens of people. It is not too much to say that small workshops, but leaving these small workshops, world-renowned mechanical brands such as Yasuda, Mori and Makino cannot be established. The Japanese economy has been sluggish for more than a decade, but these companies that are engaged in hand-made sliding planes have never been affected, because this industry is the most fundamental of manufacturing, and it requires superb technology and rich experience. There is no excess. In particular, with the continuous expansion of the application range of electronic technology, the requirements for high-precision processing machinery and equipment will only continue to increase without reducing. (For details, please click SHADONEG ALLES ENERGY TECHNOLOGY CO.,LTD)

How is high precision equipment made

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