What is a torsion spring
A torsion spring belongs to a coil spring. The ends of the torsion spring are fixed to other components. When other components rotate around the center of the spring, the spring pulls them back to the original position, generating torque or rotational force. The torsion spring can store and release angular energy or statically fix a device by rotating a force arm about the central axis of the spring body. These springs are usually close-packed with a pitch between the coils to reduce friction.
Torsion spring is the ultimate of the variant spring, from single torsion spring to double torsion spring special torsion spring, even the deformation of various torsion bars, which can be shaped according to design. Therefore, it is difficult to grasp the necessary information of the torsion spring when designing:
(1) Free length.
(2) Control diameter: (a) outer diameter, (b) inner diameter, (c) inner diameter of casing, or (d) outer diameter of round rod passed through.
(3) Wire size "wire diameter".
(4) Materials (type and grade).
(5) Number of turns: (a) total number of turns and (b) right-handed or left-handed.
(6) Torsion force: pounds deflected to a certain angle.
(7) Maximum deflection (angle from free position).
(8) The form of the end.
Garage door torsion spring
The torsion spring acts on the opening and closing stroke of the electric garage door. When the door is closed, the high-strength nylon wheel rotates around the galvanized tube of the spring's central shaft. The originally tightened spring naturally relaxes due to the generation of torque (or rotational force), helping to close the door. But when the door is closed, the corresponding spring is also tightening.Read More
When the door is opened, the tensioned spring naturally pulls the door body back to the initial position due to the effect of torque to achieve the purpose of assisting. Normally, such springs on the market are usually close-fitting. However, during the twisting process between the spring coils, they will naturally distort and deform, creating too much resistance, affecting the normal operation of the rolling shutter.
Therefore, according to long-term testing of electric garage door production plant parts, the spring coil spacing is adjusted to a width of 2mm to reduce friction and prevent them from generating resistance to rotation or external forces of rotation.
Garage door torsion spring installation parameters
1. The door is placed below (closed): one end of the torsion spring is fixed, and the other end is wound to the number of turns required for installation, then the adjusting end of the automatic garage door torsion spring is pushed to the fixed end, and the adjustment method is tightened. Blue screws.
Number of turns of torsion spring = door height ÷ wire wheel circumference + pre-tightening 0.5 to 1 turn.
2. Put the door on it (ie open state): fix one end of the torsion spring, lengthen the torsion spring along the adjusting end by 60 ～ 120mm, pre-tighten 0.5 ～ 1 turn, and finally fix the torsion spring adjusting end to the shaft with screws on. Why is the torsion spring stretched? Because the torsion spring's outer diameter will become smaller and the number of turns will increase during the lifting process of the door body, therefore, the lengthened spring will have a certain gap to facilitate the lifting of the door body.
Garage door torsion springs are mechanical parts that work by using elasticity, and are generally made of spring steel. It is used to control the movement of the parts, alleviate the impact or vibration, store energy, and measure the force. It is widely used in computers, electronics, home appliances, cameras, instruments, doors, motorcycles, harvesters, automobiles, etc.
The main equipments of production equipment are: digitally controlled multi-function computer coil spring machine, mechanical automatic coil spring machine, spring grinding machine, heat treatment equipment, large-scale hot coil spring production line, and quality testing instruments.