Q:Physics high school. Why does a spring fall to the lowest point and the acceleration a must be greater than the acceleration of gravity g ah. Seek expert

For small spheres, the energy is conserved from the free fall to the ultimate spring compression equal to the maximum value of XMgX=0.5kX^2 (this formula is obtained by integration, do not know if you have no calculus)Calculate X=2mg/k, then the lowest point is the resultant force of the ball is kX-mg=2mg-mg=mg, in the direction of acceleration, the size is exactly equal to GIf the ball is considered to fall from high, then the energy conservation before it converts the energy of the potential energy into springs is naturally more, and the acceleration of the lowest point ball is greater than g

Q:Want to practice how to use pectoral muscle spring expander

Spring expander ah, ha ha this thing is very kindI bought the first exercise equipment is it, when the first day of buying (already pulled out)Let me answer your question1, at least every day to pull more than 200, you can divide into 10 groups, a group of 202 do you have a box for packing when you buy it? It should be illustrated. I bought it before. AMan to show you how to use the most simple method, is placed in the chest, chest behindPull behind the sideways pull, a head in the sole of the foot drop, he slowly realize it3, how long do you need to do this? It depends on how big you areIf you insist on the basic 200 tomorrow, it will be effective in less than a monthGo ahead and hope my answer will help you

Q:Can springs be used for support?

One point, the spring you choose to bear the force is higher than the gear weight pressure, if higher than, then the spring to withstand 0. Unless the heat changes, the spring steel is denatured. Long periods of rust change can also make a difference. Deal with the above two points. 0 pressure spring does not exist short pressure

Q:Stainless steel and spring steel hardness, who is hard?

To sell the spring steel where seen relatively hard two pliers are very difficult to open

Q:How to process Spring Steel

The available oxygen converter furnace and open hearth furnace or general production of spring steel; high quality spring steel or better quality with special properties, furnace or vacuum refining furnace. The content of carbon, manganese, silicon and other major elements in spring steel is narrow, and the chemical composition must be strictly controlled during smelting. When the silicon content is high, it is easy to form bubbles and other defects. After the ingot is rolled and rolled, the cooling is not easy. Therefore, the raw materials used for smelting must be dry, as much as possible to remove gas and inclusions, and to avoid overheating of the steel.

Q:How to choose spring steel material?

Spring steel is selected on the basis of the section size of the spring, such as high carbon steel 65, suitable for production in the spring of 12 ~ 15mm under section 60CrMnA, suitable for the production of spring and the car less than 50mm in diameter with heavy-duty spring. The 30W4Cr2VA is used to make heat-resistant spring for work below 500 degrees centigrade. Generally, hot forming springs are generally quenched and tempered at moderate temperature to obtain a structure with a maximum elastic limit and fatigue properties

Q:Is spring steel manganese steel?

The most important characteristic of manganese steel is that it can be worked hard under strong impact and extrusion, and its wear resistance is improved, mainly by its working hardening.Spring steel mainly requires large elasticity, high yield strength, and can withstand repeated load without breaking. Spring steel only after heat treatment (quenching + medium temperature tempering) can show its high elasticity, that is, after a certain load, does not occur permanent deformation. The content of Mn in spring steel is much lower than that of Mn in manganese steel.

Q:Buffer spring buffer for automobile

The automobile spring buffer (cushion glue) is a kind of rubber product with high elasticity and high tenacity. It belongs to the automobile refitting parts. The utility model is used for installing the spiral spring of an automobile suspension system, and mainly acts as a buffer shock absorber and protects the shock absorber. This function is a physical function.The buffer is made of an open circular ring with a groove (for holding a coil spring), with two, three or more holes on each side. According to the standard specification of the spring spacing, the buffer rubber is divided into seven standard models: A+A, A, B, C, D, E and F. In theory, these seven models can cover the world's largest part of the spiral spring shock absorbers required.

Q:Cold rolled coil spring spring and difference "

The main production process is different, the compression spring as an example:The typical process of coil spring: blanking - end processing (rolled or forged flat) - heating - - - quenching - tempering spring roll grinding end - compressor (load - Test), shot peening (cleaning) - coating.Cold roll spring does not require heat treatment of material roll, point line process: rolling, annealing, stress to both ends of the surface grinding, (blast), (the whole school), (BKS), standing or forcing treatment, surface inspection and treatment.Coil spring is mainly used for rolling large spring, heating easily after twisting forming, springback is smaller, molding after quenching and tempering treatment.The cold coiling spring is directly coiled with spring steel wire, and the resilience is greater, and the winding tools need to consider the springback compensation amount and roll into the direct tempering process.

Q:What's the spring material to?

There are many kinds of spring steel, the most commonly used are 65Mn and 60Si2Mn.