The name and size relationship of each part of the spring

Spring is an elastic element widely used in the mechanical and electronic industries. The spring can produce greater elastic deformation when loaded, converting mechanical work or kinetic energy into deformation energy, and the deformation of the spring disappears and returns to its original shape after unloading. Deformation energy is converted into mechanical work or kinetic energy.

　　1. The main functions of the spring are:

　　①For force measurement, such as spring scales and gauge springs, etc.;

　　②Control movement, such as clutch, brake and valve control spring;

　　③Vibration reduction and cushioning, such as buffers, springs of shock absorbers, etc.;

　　④ Energy storage or transmission, such as springs on clocks, meters, and automatic control mechanisms.

　　2. Type of spring:

　　There are many types of springs, such as compression springs, extension springs, torsion springs and metal wire forming.

　　3. The name and size relationship of each part of the spring:

　　 (1) Talk about spring wire diameter d: the diameter of the steel wire used to make 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 u003d (D + D1) 2 u003d D1 + d u003d D-d

　　(5) t: Except for the support ring, the axial distance between the corresponding points of two adjacent coils of the spring on the pitch diameter becomes the pitch, which is represented by t.

　　 (6) Effective number of turns n: The number of turns that the spring can maintain the same pitch.

　　 (7) Number of support turns n2: In order to make the spring work evenly, to ensure that the end of the axis is perpendicular to the end surface, the two ends of the spring are often tightened during manufacturing. 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) Total number of turns n1: the sum of the effective number of turns and the support ring. That is, n1u003dn+n2.

　　 (9) Free height H0: The height of the spring without external force. Calculated by the following formula: H0u003dnt+(n2-0.5)du003dnt+1.5d (when n2u003d2)

　　 (10) Spring unfolded length L: The length of the steel wire required to wind the spring. L≈n1 (ЛD2) 2+n2 (compression spring) Lu003dЛD2n+ hook extension length (tension spring)

　　 (11) Helix direction: There are left and right rotations. Right-handed is commonly used, and right-handed is generally used if it is not specified in the drawing.

　　4. The prescribed drawing method of the spring:

　　 (1) On the view of parallel spiral spring lines, the contour lines of each circle are drawn as straight lines.

　　 (2) If the effective number of turns is more than 4 turns, you can only draw 1 to 2 turns at both ends (not including support ring). The middle is connected by a dotted line passing through the center of the spring steel wire.

　　 (3) On the drawing, when the direction of rotation of the spring is not specified, the coil spring is drawn as right-handed, and the left-handed spring is also drawn as right-handed, but left-handed is required.