The butterfly spring, also known as belleville spring washer, was invented by the Frenchman Belleville and is a conical cross-sectional washer spring made of metal plates or forged blanks. Disc springs can be divided into three categories according to the shape of the cross-section: including ordinary disc spring (its cross-section already shape is rectangular), disc spring with radial groove, and trapezoidal cross-sectional disc spring. Ordinary disc spring is divided into support surface and no support surface two categories, butterfly spring with radial groove is on the basis of ordinary disc spring, along the radial out of a number of evenly distributed grooves, grooves can be opened from the inner hole outward circle direction, can also be opened from the outer circle to the inner direction;
Butterfly spring function.
A spring is an elastic element that works by producing a large elastic deformation on its own. It is widely used in all kinds of machines. Its main functions are:
1) Control the movement of machinery, such as the spring in the internal combustion engine to control the opening and closing of the cylinder valve, the control spring in the clutch.
2) absorb vibration and shock energy, such as vibration-absorbing springs in various vehicles and springs of various buffers;
3) Store and release energy, such as clock springs, gun bolt springs, etc.
4) Measure the size of force, such as spring scales and springs in force gauges, etc.
Classification of butterfly springs.
According to the force nature, the spring can be divided into stretch spring, compression spring, twisting spring and bending spring, according to the shape can be divided into disc spring, ring spring, plate spring, coil spring, cone vortex spring and twisting rod spring, according to the production process can be divided into cold spring and hot roll spring. Ordinary cylindrical spring because of the simple manufacture, and according to the load conditions to make a variety of types, simple structure, so the application is the most widely. Spring manufacturing materials should generally have high elastic limit, fatigue limit, impact toughness and good heat treatment performance, commonly used carbon spring steel, alloy spring steel, rust-free spring steel and copper alloy, nickel alloy and rubber. The manufacturing methods of butterfly spring are cold roll and hot roll method. Spring wire diameter is less than 8 mm of the general use of cold roll method, larger than 8 mm with hot roll method. Some springs are also subjected to strong pressure or shot treatment after being made to improve the carrying capacity of the springs.
Butterfly spring – spring classification.
There are many kinds of springs, if according to the load nature of their bear, the spring is mainly divided into stretch ingest editing spring, compression spring, twisting spring and bending spring and so on. If in accordance with the shape of the spring can be divided into coil spring, disc spring, ring spring, plate spring, reed and so on. The basic types of various springs are listed in the table.
The butterfly spring spiral twist inge spring is one of the most commonly used torsion springs. The coil has more laps, largedeformation, and larger storage energy characteristics, more used for compression and instruments, watches and clock strains. Plate springs can withstand large bending, often used in the load direction size is limited and the amount of deformation and larger occasions. Due to the good vibration cancellation ability of plate springs, this spring is commonly used in the suspension devices of automobiles, tractors and railway vehicles. The physical diagram of various types of springs is given below.