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Spring material and allowable stress

Springs are often subjected to variable loads or impact loads during work. In order to ensure that the springs can work reliably for a long time, their materials must have high elastic limits and fatigue limits, and at the same time should have sufficient toughness and plasticity, as well as good heat treatment. For spring materials and properties, please refer to relevant manuals, specifications and standards (GB/T129.6-92, GB4357-89). Commonly used spring steel mainly includes:

What is the role of each element in the spring

We know that stainless steel hardware springs are more beautiful in appearance and corrosion-resistant than ordinary springs. However, there is no difference between stainless steel hardware springs and ordinary springs in terms of elastic properties. The main thing depends on the material composition of the spring. This also determines the price difference of stainless steel hardware springs.

Scroll spring processing technology

Everyone is familiar with springs. We usually use rectangular compression springs. This kind of spring is often used on ballpoint pens. Other types of springs may not be too common for everyone. Springs will be used in many products, such as presses and some bouncers, because the spring has a relatively good rebound ability and just meets the needs of these products. As mentioned above, there are many types of springs. What I want to introduce here is scroll springs. With the development of scroll springs in recent years, there have been many advancements in processing technology. Let me learn about them together.

The magical use of springs in these industries!

Let's take a look at the application of springs in these industries

How to avoid improper use of springs

1. Avoid applications that exceed the maximum compression. The pressure will cause breakage and close to long use. This will make the hardware spring wire gradually close, so the higher the fixed number of the hardware spring will cause the load curve to follow It will cause the spring to break at this time, so it cannot be used more than 300,000 times.

How the spring is made

Coiled spring is the abbreviation of spring coiling. Coiled spring is the first process of spring manufacturing, and it is also an important process. The precision of coiling plays an extremely important role in the entire manufacturing process. It basically determines the geometric size of the spring And characteristics and material utilization.

What are the additional functions of the spring?

之前我们给大家介绍过生活中弹簧的实际运用，那么除了实际运用，外弹簧还有哪些附加功能呢？

在此，珠海鑫隆科技为大家一一介绍：

一、测量功能

我们知道，在弹性限度内，弹簧的伸长（或收缩）跟外力成正比。利用弹簧这一性质制成弹簧秤。

二、复位功能

弹簧在外力作用下发生形变，撤去外力后，弹簧就能恢复状态。很多工具和设备都是利用弹簧这一性质来复位的。例如，许多建筑物大门的合页上都装了复位弹簧人们进出后，门会自动复位。人们还利用这一功能制成了自动伞、自动铅笔等用品，十分方便。此外，各种按钮和按键也少不了复位弹簧。

三、带动功能

机械钟表，发条玩具都是靠上紧发条带动。当发条被上紧时发条产生弯曲形变，存储一定的弹性势能。释放后，弹性势能转变为动能，通过传动装置带动转动。在玩具枪和发令枪和军用枪支也是利用弹簧的之一性质工作的。

四、缓冲功能

在机车汽车车架与车轮之间装有弹簧，利用弹簧的弹性来减缓车辆的颠簸。

五、发声功能

当空气从口琴，手风琴中的簧孔中流动时，冲击簧片，簧片震动发出声音。

六、紧压功能

观察各种电器开关会发现，开关的两个触头中，必然有一个出头装有弹簧，以保证两个出头紧密接触，是导通良好。在订书机中有一个长螺旋弹簧它的作用一方面是顶紧钉书钉，另一方面是当最前面的钉被推出后，可以将后面的钉送到最前面以备钉舒适推出，这样就能自动的将一个个钉推到最前面，直到钉全部推出为止。

此外，像夹衣服的夹子，圆珠笔，钢笔套上的夹片都利用弹簧的紧压功能夹在衣服上。

What are the precautions for spring processing?

What do you need to think about in the process of spring processing? Today Zhuhai Loncin Technology will tell you

1. Springs without support rings and springs with too thin steel wire diameters should not be welded to the spring head, but the end cable should not be significantly loose, and should be deburred. For multi-strand springs that need to be welded to the head, the length of the welded part should be less than 3 times the cable diameter (the longest is no more than 10 mm). The heating length should be less than one circle, and it should be polished smoothly after welding, and the welding part should be locally annealed at low temperature during gas welding.

2. The support ring can choose two methods: cold and hot, according to product requirements. It is not allowed to heat the spring to sparking or whitening by using the heat-parallel method, and the temperature of the silico-manganese steel shall not be higher than 850°C. The support ring and the effective ring should be in effective contact, and the gap should not exceed 10% of the nominal gap between the rings.

3. The characteristics of the multi-strand spring can be determined by the adjustment lead, and the cable distance can be adjusted as necessary during winding. The twisting distance can be 3~14 times the steel wire diameter, but generally 8~13 times is better. The spring force is also closely related to the free height, the end ring, the outer diameter and the performance of the steel wire. It can be changed by adjusting one or several of them.

4. The pressing time of important springs is 24 hours, and that of ordinary springs is 6 hours or continuous compression 3~5 times, each time holding for 3~5 seconds. The gap between the spring and the mandrel during compression is preferably 10% of the diameter of the mandrel. If the gap is too small, it is difficult to operate, and if the gap is too large, the spring is likely to be bent and deformed. If one of the springs breaks during compression, the rest should be processed again.

5. For multi-strand springs with a large H0/D2 value, attention should be paid to their deformation during heat treatment, whether to wear the mandrel and the placement method should be considered, and appropriate heat treatment equipment should be selected. Under the repairable condition, tempering and hot pressing can be carried out many times to achieve the purpose.

6. The spring surface treatment is generally phosphating treatment, but other treatments can also be carried out. Where zinc and cadmium are to be coated, the hydrogen removal treatment should be carried out after electroplating, and 3% (not less than 3 pieces) shall be drawn after the removal of hydrogen to retest the standing treatment, and there shall be no breaks in the retest. The spring should be cleaned of surface dirt, salt marks, and oxide scale. The method can be sand blowing or gasoline cleaning, but acid cleaning is not allowed.

Zhuhai Longxin Technology has introduced advanced automation equipment, with high production rate and good quality. Welcome new and old customers to inquire about cooperation business!

The practical application of springs in life

What are the practical applications of springs in life? Zhuhai Longxin Technology will explain for you one by one:

1. Control the movement of machinery, such as valve springs in internal combustion engines, control springs in clutches, etc.

2. Absorb vibration and impact energy, such as buffer springs under cars and trains, and vibration-absorbing springs in couplings.

3. Store and output energy as power, such as clock springs, springs in firearms, etc.

4. Used as a force measuring element, such as a force measuring device, a spring in a spring scale, etc. The ratio of spring load to deformation is called spring stiffness. The greater the stiffness, the harder the spring.

According to the nature of the force, springs can be divided into extension springs, compression springs, torsion springs and bending springs. According to their shapes, they can be divided into disc springs, ring springs, leaf springs, spiral springs, truncated cone scroll springs and torsion bar springs. . Ordinary cylindrical springs are the most widely used because they are simple to manufacture, can be made into various types according to the load conditions, and have a simple structure.

Zhuhai Longxin Technology welcomes new and old users to inquire and negotiate business with first-class products and first-class services.