Garage Door Torsion Spring

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

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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

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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.

Comparison of different hardness indexes of stainless steel pipe

 Stainless steel pipe generally use three Brinell, Rockwell, Vickers hardness indicators to measure their hardness.Brinell hardness is widely used in stainless steel pipe standards. Generally, the indentation diameter can indicate the hardness of the material, which is very intuitive and convenient, but this hardness is not suitable for harder or thinner steel and steel pipes.

           The Rockwell hardness test of stainless steel pipes is similar to the Brinell hardness test, and they are performed by the indentation test method. The difference is that this is required to measure the indentation depth. The Rockwell hardness test is generally a widely used method. Among them, HRC is second only to Brinell hardness HB in the steel pipe standard. Therefore, Rockwell hardness is generally suitable for measuring very soft or extremely hard metal materials. It can make up for the shortcomings of the Brinell method and is simpler than the Brinell method. It can read the hardness value directly from the dial of the hardness machine. But because the indentation is small, the hardness value is not as accurate as the Brinell method.

          The Vickers hardness test of stainless steel pipes also uses the indentation test method, which can be used to determine the hardness of very thin metal materials and surface layers. It has the advantages of the Brinell and Rockwell methods, and can overcome their basic shortcomings, but it is not as simple as the Rockwell method, so the general Vickers method is rarely used in steel pipe standards.

The importance of aluminum alloy doors and windows seals

          Is it important to seal aluminum alloy doors and windows? What does it do? Let answer it for you now.

         After the installation of each door and window, there will still be a certain gap between the joint with the wall. Poor handling may have some impact on home life, such as the inability of doors and windows to completely block entry of odorous air and dust. The role of the sealing strip is to strengthen the sealing effect of aluminum alloy doors and windows.

         There are many aluminum alloy door and window sealing strips on the market. When they are not used for a long time, the aging phenomenon will occur. How can we not affect the use of doors and windows? What kind of aluminum alloy doors and windows do consumers buy? Manufacturing technology, we must know how to choose good quality.

            In addition to considering quality and manufacturers' choices, we also need to pay attention to daily maintenance, because the weather strips are like wind and rain, and rapid aging is inevitable. Therefore, how to reduce the acceleration of aging is the top priority of maintenance. Generally, when cleaning, keep it dry after cleaning, otherwise the service life of aluminum alloy doors and windows will be shortened.

Application of aluminium food box in microwave oven

            Whether it is cooked or processed food, you can cook in a microwave oven. The use of aluminum foil containers ensures food freshness and has other characteristics. Among them, the use of aluminium food box features also can ensure good and uniform heat transfer. Can be used on ovens and microwave ovens to protect food from scorching, suitable for refrigerated, frozen and fresh food packaging

           It can be heated on the original packaging, and it can remain stable after cooking and heating. It is safe, hygienic and reliable. Containers heated at high temperature will not spill harmful substances to contaminate food. 

            When the aluminum foil container is used in a microwave oven, it should be noted that the aluminum foil container is no more than 3 cm thick, because microwaves can no longer pass through it. The container needs to be filled with 2.5 cm of food. If it is not filled, there may be a risk of scorching.

           Always remove the aluminum foil cover or the food will not heat up. If the food must be covered, use a plate or microwave-adhesive film. Don't touch the metal and the metal, the container should not touch the wall, door and bottom of the furnace, or other metal parts. This is prone to arcing and may cause damage to the microwave oven. Also, do not use plates with gold and silver trim.

          The aluminum foil container needs to keep a distance of 2 cm from the stove wall. It needs to be kept away from other aluminum foil containers. For example, the aluminum foil container can be placed on a plate, and the cooking and heating time is increased by about 10%, because the food absorbs microwaves from above. Damaged aluminum foil containers. Do not reuse aluminum foil containers.

Mobile container house safety precautions

       In order to ensure the safe use of the Mobile container house and prevent accidents, the following safety measures should be taken during the construction of the mobile house: First, the steel house with color steel plates must be used steadily, although the structural strength and stiffness of the steel house And stability are relatively good, but still pay attention to stability when installing, the installation quality needs to meet the safety requirements of the construction site.

        When making a facility construction plan for a mobile home, the manufacturer is generally responsible for installation and construction, because they have a professional construction and installation team, and they check whether the installation is also required according to the quality stipulated by the manufacturer's construction plan.
        In order to choose the correct mobile home building location, choose a good location and surrounding environment, you need to avoid the loose lands on the side of the foundation pit and the river, you also need to avoid the locations and open areas prone to tornadoes. The front should avoid the main windward direction.

        The height of the movable room is two stories, and it should be filed with the safety supervision agency. The erection personnel should wear full hats and safety helmet belts. They must fasten safety belts and fasten safety buckles when suspended.