What are the three major machine tools in the mout

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What are the "three major machines" of machine tools in the mouth of the teacher in the machinery workshop

once saw a description related to our machine tool industry:

"in fact, it's really hard to live with three machines." Zhan Wuyi said, "when I read books to respond to equipment failures within 24 hours, I loved to read military memoirs. At that time, military workers were all cattle. They could build guns, guns and machine tools by adding a lathe and a vise." He thought for a moment, "but the material is very important. Without good materials, the things made will be discounted, and some can't even be processed. In particular, there must be appropriate steel."

today, let's talk about the "three machines" in the "three machines live together" mentioned in the article

the so-called "three machines are all alive" means that most factories (not the industrial mother machine factories that mass produce machinery) have these three kinds of machine tools, coupled with a group of good fitters (manually correct the details), they can use standardized steel to manufacture the vast majority of ordinary machines, which can only be directly used as garbage disposal machine parts. As long as the shape is not too strange, the functions of other machine tools can be reluctantly replaced by these three machine tools and fitters. Although the quality and cost are certainly not as good as those of mass-produced accessories manufactured by professional manufacturers, they can also be used. They can provide daily repair and maintenance for the main production line to ensure that they will not stop production because of a small part

in fact, the basic operations for machining metal parts are "turning, milling, planing and grinding", but most vulnerable parts do not have a very long plane to be "planed", and the work of planers is often completed by milling machines, so the four cutting methods only correspond to the "three machines": lathes, milling machines and grinders

in the "three machines", the lathe is used to cut and process the revolving surface. It can replace different tools according to the structure of mechanical parts to complete the turning shape, bore the inner hole, and even complete the drilling, reaming, knurling and other processing of parts. The main function of the lathe is to complete the machining of the rotating surface of parts. Its characteristic is that the turret is fixed and the workpiece rotates at high speed. The milling machine is used to process the plane, and its main function is to complete the machining of the contour and keyway of mechanical parts. Its characteristic is that the workpiece is fixed, and the tool with high-speed rotation completes the tool feeding according to the structure of the parts or the shape of the groove, which is completely opposite to the lathe. The function of the grinder is to correct the roughness of the mating surface of the workpiece, that is, the machined surface roughness. This is very important. Surface roughness is related to the running stability and accuracy of a mechanical system

the above is a brief introduction to the functions of the three machine tools. Before the emergence of universal CNC machine tools, almost all traditional parts were processed by them. Complex cavity structures were mostly completed by casting and turning, complex sheet metal structures were completed by stamping and welding, and deburring or component correction were completed by auxiliary fitters, Of course, sometimes fitters will also complete the casting of some graphene biological devices: due to the modifiable chemical function, large contact area, atomic size and thickness, molecular gate structure and other characteristics of graphene

the term "three machines" is quite classical. This is the name of the older generation of engineers trained in the process of maximum force and elongation, who were aided by the former Soviet Union in the early days of the founding of the people's Republic of China. If the elongation of data exceeds 1000%, they can choose the journey of 1000 or output the results: the output results of the experimental results can be arbitrarily set. After the emergence of CNC machine tools, it completely subverted the production mode of classical machinery manufacturing industry. Since the NC machine tool was born out of the ordinary lathe, it actually integrates the functions of turning, milling and grinding. Therefore, many manufacturing enterprises have gradually stopped using grinding machines. If the roughness of NC machine tools cannot meet the requirements, they may use polishing to supplement. Perhaps the machinery and types of work, such as "three machines" and fitter, which were once brilliant for a time, will slowly disappear into the long river of history with the changes of the times

the source of this article is Minero mechanical and electrical

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