The main function of the shell is introduced

The ratio of the load and deformation of the shell is called shrapnel stiffness, the stiffness, the greater the harder the shrapnel. According to the mechanical properties of the shell can be divided into tensile shrapnel, compression shrapnel, reverse bending shrapnel shrapnel and, according to the shape can be divided into the dish shrapnel, annular shell, shrapnel, spiral shell, truncated cone vortex roll of shrapnel and torsion bar shrapnel, etc. Ordinary cylindrical spring piece because of its simple manufacture, and can be made into various types according to the load situation, simple structure, is the most widely used. Shrapnel manufacturing materials in general should have high elastic limit, fatigue limit, impact toughness and good heat treatment performance, such as commonly used are carbon shell, shrapnel steel alloy, stainless steel shrapnel steel and copper alloy, nickel alloy and rubber, etc. Shrapnel of manufacturing methods of cold rolled and hot rolled method. Shrapnel silk with cold volume method is generally less than 8 mm in diameter, with hot volume method is greater than 8 mm. Some shrapnel after made to crush or shot peening treatment, can improve the bearing capacity of the shrapnel. Shrapnel is widely used in machinery and electronics industry an elastic element, shrapnel when loading can produce large elastic deformation, the mechanical work or kinetic energy is converted into deformation energy, and disappeared shrapnel deformation after unloading and return to its original state, the deformation energy into mechanical energy or kinetic energy. Shrapnel's main functions: (1) control of mechanical movement, such as the engine valve of shrapnel, clutch control of shrapnel, etc. (2) to absorb vibration and impact energy, such as cars, trains, cars under the cushion of shrapnel, coupling vibration absorbing shrapnel, etc. (3) storage and output energy as power, such as clocks shrapnel, shrapnel in the gun etc. (4) is used as the load components, such as force-measuring device, shrapnel shrapnel in the scale etc.