Development and quenching and tempering of expansion sleeve coupling

　　The common expansion sleeves in the market mainly include diaphragm expansion sleeves, universal expansion sleeves and expansion sleeves, etc. There are many types, and the scope of application is very wide.The expansion sleeve is a common part of machinery, it can be used to connect different shafts, let them rotate together or transmit torque, and its function is very powerful.In addition, in the high-speed and heavy-duty transmission process, the coupling also has the function of buffering and damping vibration.
　　The performance of the expansion sleeve coupling is continuously improved and improved.With the rapid advancement of science and technology, the use of expansion sleeves and pulleys has also increased the use of elastic sleeve pin couplings.The expansion sleeve, like the coupling, is an indispensable part of the transmission process.The use of the expansion sleeve has brought great help to the transmission process, and it should be used together with some other components.The expansion sleeve coupling has undergone great changes after these years of development.
　　In the late last century, the development speed of expansion sleeves and couplings was very fast. At that time, the manufacturers mainly improved their varieties and performance, and their performance has been greatly improved. They can adapt to The needs of enterprises are widely used in many fields. Designers have made great changes in the design of couplings and expansion sleeves, which are in line with market demand.
　　Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing processes, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but by changing the internal microstructure of the workpiece, or changing the chemical composition of the surface of the workpiece , To give or improve the performance of the workpiece.Its characteristic is to improve the internal quality of the workpiece, which is generally not visible to the naked eye. In order to make the metal workpiece have the required mechanical properties, physical properties and chemical properties, in addition to the reasonable selection of materials and various forming processes, the heat treatment process Often it is.Steel is a widely used material in the machinery industry. The microstructure of steel is complex and can be controlled by heat treatment. Therefore, the heat treatment of steel is the main content of metal heat treatment.In addition, aluminum, copper, magnesium, titanium, etc. and their alloys can also change their mechanical, physical and chemical properties through heat treatment to obtain different performance properties.
　　Generally, the heat treatment combining quenching and high temperature tempering is called quenching and tempering treatment.Quenching and tempering treatment is widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts that work under alternating loads.After quenching and tempering, the tempered sorbite structure is obtained, and its mechanical properties are better than the normalized sorbite structure of the same hardness.Its hardness depends on the high temperature tempering temperature and is related to the tempering stability of the steel and the size of the workpiece section, generally between HB200-350.