The limit switch of the automatic fiber cutting machine of the group: the automatic fiber cutting machine of the group of groups encounters an unexpected situation during the cutting process, and the upper or lower limit of the height adjuster will automatically change the running direction or stop running to prevent damage Laser nozzle. Basic knowledge of upper and lower limit switch parallel metal cutting machine tools 2 Machine tool classification and model number 3 Machine tool basic transmission form, ordinary lathe transmission system analysis, cylindrical grinder transmission system analysis, horizontal boring machine structure and transmission system analysis, basic knowledge of metal cutting machine tools , Overview of the development of metal cutting machine tools 1.2 Basic composition and structure of machine tools 1.1 Overview of the development of metal cutting machine tools The development history of machine tools is closely related to the progress of human society. Machine tools evolved from the use of tools. The history of human civilization for nearly 6,000 years has experienced the evolution from hand tools to modern machine tools in the development and application of various tools. In the Stone Age (in ancient times), the earliest tools invented and used by humans were processed special stones (stone knives, stone axes), which were used to extend or strengthen the functions of human hands or teeth. During this period, our country began to use bow drills to drill holes in stone axes and pottery. The Bronze Age (beginning around 3000 BC) began to use metal tools during this period. In the Shang Dynasty (16th to 11th centuries BC) in my country, bronze drills were used to drill holes on bones. During the Iron Age (770-476 BC), cast iron began to be used during this period, and turning tools began to be used. At that time, wood was mainly processed. The oldest lathe pattern appears on the tombstones of ancient Egyptian kings. During the Middle Ages (feudal society), the Western Han Dynasty (206 BC to 23 AD) used rod drills and tube drills to drill more than 18,000 holes (diameter Ф1~2mm) on more than 4,000 jade pieces on the 'Jade Garment' ). Ancient my country also invented the dance diamond (using the inertia of the flywheel).
In this period, the original drilling machine and woodworking lathe appeared in the Taiwan-group automatic fiber cutting machine, such as: bowstring lathe, foot lathe, etc. (human power as the power source). In the middle of the 17th century, animal power was used instead of human power as the power of machine tools. In 1668, the large copper ring on the astronomical instrument was processed by milling with an insert milling cutter (diameter of 2 feet, about 6.67 meters), and it can be ground with a grinding stone. In the 18th century, during the transition period from workshop handicraft industry to capitalist machine industry, Europe and the United States entered the capitalist society after the British Industrial Revolution. During this period, the tool holder was invented to replace the hand-held tool, marking a qualitative leap in cutting. Marx once pointed out: 'As soon as a real tool is transferred from a human hand to an organization, a machine appears instead of a simple tool.' Subsequently, various types of machine tools were created one after another (the steam engine was used as the power source at the end of the 18th century). The approximate age of the appearance of various types of machine tools is as follows: Planer appeared in 1751 to process the pump body. In 1770, a horizontal boring machine was used to process steam engine cylinders (650mm accuracy 1mm). From 1818 to 1855, milling machines, milling machines, and profiling lathes appeared. At the end of the 19th century, modern grinders appeared to process workpieces with higher hardness and precision; special machine tools and semi-automatic and automatic machine tools produced munitions, bicycles, and sewing machines; large machine tools produced large generators, steam turbines, and steel rolling mills. At that time, the transmission method was mostly: the transmission of the sky shaft belt tower wheel, and the transmission efficiency was very low. At the beginning of the 20th century, high-precision machine tools such as coordinate boring machines appeared to require higher machining accuracy. The transmission of the sky shaft, belt, and tower wheel has been developed to the transmission of a single motor and gear box. In the 1940s, automatic production lines began to appear, mainly used in the automotive bearing industry (USA). In the 1950s (1952), the United States developed the world's 'NC machine tool' three-axis CNC milling machine (using electronic tube components). This is another qualitative leap in cutting processing technology, a revolution in the machine tool industry, and then after three years of improvement and automatic programming research.