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Hardware knowledge: the name and size relationship of each part of the spring
- Time of issue:2019-12-30
- Views:0
Hardware knowledge: the name and size relationship of each part of the spring
(Summary description)The spring is an elastic element widely used in the mechanical and electronic industries. The spring can produce a large elastic deformation when it is loaded, and convert the mechanical work or kinetic energy into deformation energy. After unloading, the deformation of the spring disappears and returns to its original state. Deformation energy is converted into mechanical work or kinetic energy.
- Time of issue:2019-12-30
- Views:0
Information
The spring is an elastic element widely used in the mechanical and electronic industries. The spring can produce a large elastic deformation when it is loaded, and convert the mechanical work or kinetic energy into deformation energy. After unloading, the deformation of the spring disappears and returns to its original state. Deformation energy is converted into mechanical work or kinetic energy.
1. The main functions of the spring are:
① Force measurement, such as springs of spring scales and gauges, etc.;
② control movements, such as clutches, brakes and valve control springs;
③ Vibration reduction and buffering, such as buffers, springs of shock absorbers, etc.;
④ Energy storage or energy transmission, such as springs on clocks, instruments and automatic control mechanisms.
2. Type of spring:
There are many types of springs, the common ones are compression springs, extension springs, torsion springs and wire forming.
3. The name and size relationship of each part of the spring:
(1) Talking about the diameter of the spring wire d: the diameter of the steel wire used to manufacture the spring.
(2) Spring outer diameter D: the maximum outer diameter of the spring.
(3) Spring inner diameter D1: the minimum outer diameter of the spring.
(4) Spring diameter D2: the average diameter of the spring. Their calculation formula is: D2=(D+D1)÷2=D1+d=D-d
(5) t: Except for the support ring, the axial distance between the corresponding points of the two adjacent rings of the spring on the middle diameter becomes the pitch, which is represented by t.
(6) Effective number of turns n: the number of turns the spring can keep the same pitch.
(7) Number of supporting turns n2: In order to make the spring work evenly and ensure that the axis is vertical to the end face, both ends of the spring are often tightened during manufacture. The number of tight turns only serves as a support and is called a support ring. Generally, there are 1.5T, 2T, 2.5T, and 2T is commonly used.
(8) The total number of turns n1: the sum of the effective turns and the support turns. That is, n1=n+n2.
(9) Free height H0: the height of the spring without external force. Calculated by the following formula: H0=nt+(n2-0.5)d=nt+1.5d(when n2=2)
(10) Spring unfolding length L: the length of the steel wire required for winding the spring. L≈n1(ЛD2)2+n2(compression spring)L=ЛD2n+deployment length of hook (tension spring)
(11) Spiral direction: There are left and right rotations, usually right-handed, and right-handed is generally used if the drawings are not indicated.
4. The prescribed drawing method of the spring:
(1) On the view of the parallel coil spring line, the outline of each coil is drawn as a straight line.
(2) For springs with more than 4 effective turns, only 1 to 2 turns at both ends (excluding support rings) can be drawn. Connect the middle with a dotted line through the center of the spring wire.
(3) In the drawing, when the direction of rotation of the spring is not specified, the coil springs are always drawn as right-handed, and the left-handed springs are also drawn as right-handed, but the word "left" must be marked.
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