Nutszg,China Self-clinching factory

The lock nut can be screwed on the stud body with a crescent wrench. The lock nut should be equipped with a washer for the shaft, which can make the small groove on the stud body relatively fixed with the small groove on the outer circumference to prevent it from loosening. The lock nut has a variety of new designs, each of which is different, but its purpose is to prevent loosening. So everyone knows how to lock the lock nut?
The working principle of the lock nut is self-locking by the friction between the nut and the bolt. The reliability of this self-locking is reduced in dynamic loads. In some important occasions, we will take some anti-loosening measures to ensure the reliability of the nut locking.
There are also two types of lock nuts. One is to use two identical nuts to be screwed on the same bolt, and a tightening torque is added between the two nuts to make the bolt connection reliable. The other is a lock nut, which needs to be used with a lock washer. The special lock nut is not a hexagonal nut, but a middle round nut. There are 6 notches on the circumference of the nut. These six notches are not only the focus point of the tightening tool, but also the locking point of the lock washer. . The two anti-loose methods are more reliable than one, but the structure is relatively complicated.
When we all lock the lock nut, we all need to operate according to the locking method of the lock nut. The correct locking of this nut is what we all need.

If hydraulic hinges are distinguished according to the base, they can be divided into fixed base and quick mounting base (self-unloading base)
The fixed base and hinge body are fixed and cannot be disassembled, which has better stability.
The quick-install and self-unloading base can be disassembled and installed independently, which has good convenience and speed, but the stability is slightly weaker.
There is also the latest three-dimensional debugging base, which is equipped with an adjusting screw, which can be adjusted left and right, which is more convenient than the general quick-install hydraulic hinge, and the stability performance is also improved.
The choice of hydraulic hinge is basically to observe from the aspects of surface technology, material thickness, hydraulic performance, and base. First determine the material, and then try whether the buffer performance is good, and then consider how to install it.

Stainless steel fasteners have good ductility and corrosion resistance, and are increasingly used in photovoltaic solar power stations. However, improper use will cause the bolts and nuts to be unable to be unscrewed after being matched, that is, "locked", commonly known as "bite", which will cause some trouble to the construction personnel. Based on the construction experience of multiple projects, the engineers of Jugao New Energy analyzed the causes of the locking of stainless steel fasteners and concluded effective methods to prevent the locking of stainless steel fasteners.
Reduce friction coefficient:
(1) Before use, check whether the thread is rough, whether there is iron filings or dirt between the threads, and make sure that the thread surface is clean and these things will often lead to lockup;
(2) Before use, you can use butter, molybdenum disulfide, mica, graphite or talc to lubricate the fasteners, and wax dipping is currently the most commonly used method;
Correct operation method:
(1) The screw must be perpendicular to the axis of the thread, and not inclined;
(2) During the tightening process, the force must be uniform, and the tightening torque must not exceed the safe torque;
(3) The speed and force of screwing in should be appropriate, not too fast or too big, use torque wrench or socket wrench as much as possible, and avoid using adjustable wrench or electric wrench;
(4) Avoid using under high temperature conditions, do not rotate fast when using, to avoid rapid rise in temperature and cause locking; (such as using electric wrenches, etc.)
(5) The use of washers can effectively prevent over-locking.

Fasteners are also called standard parts in the market. They are a general term for a class of mechanical parts used when two or more parts (or components) are fastened and connected into a whole. It is characterized by a wide variety of specifications, different performance and uses, and a high degree of standardization, serialization, and generalization. Fasteners are the most widely used mechanical basic parts and are in great demand.
1. Select the product correctly: Before use, confirm whether the mechanical properties of the product can meet the requirements of use, such as the tensile strength of the screw and the guaranteed load of the nut. The length of the screw should be selected appropriately, which shall be subject to 1-2 pitches of the exposed nut after tightening.
2. Before use, check whether the thread is rough, whether there is iron filings or dirt between the threads, these things often cause lockup.
3. Lubricate the fasteners before use: it is recommended to use butter, molybdenum disulfide, mica, graphite or talc for lubrication. At present, wax dipping is commonly used for lubrication and anti-locking.
4. Pay attention to the method of use:
a. The speed and force of screwing in should be appropriate, not too fast or too big. Use torque wrench or socket wrench as much as possible, and avoid using adjustable wrench or electric wrench. Too fast will cause the temperature to rise rapidly and cause lockup. Import pump valve
b. In the direction of force, the nut must be screwed in perpendicular to the axis of the screw.
5. The use of washers can effectively prevent the problem of over-locking.
6. Locking or seizure often occurs on fasteners made of stainless steel, aluminum alloy and titanium alloy materials. These metal alloys themselves have anti-corrosion properties and will produce a thin oxide layer on the metal surface when the surface is damaged. To prevent further corrosion. When stainless steel fasteners are locked, the pressure and heat generated between the teeth will destroy this oxide layer, causing blockage or shearing between the metal threads, and then adhesion. When this phenomenon continues to occur, the stainless steel fasteners will be completely locked and can no longer be removed or continued to be locked. Usually this series of blocking, shearing, adhering, and locking actions takes only a few seconds, so the correct understanding of the use of such fasteners can prevent this phenomenon.

(1) Door hinges—the top edge of the upper piece of the hinge should be 15 cm from the edge of the orange notch of the door, and the bottom edge of the lower piece should be 25cm from the finished floor; if there are three hinges, the middle piece should be assembled on the upper and lower two The center of the chip pitch.
(2) The assembly position of the door hinge, door stop and handle of the service desk shall be specified by the designer. (3) For door locks, unless otherwise specified, the center of the lock handle should be lm away from the finished floor.
(3) All hardware assembly should strictly abide by the manufacturer’s instructions. When installing hardware, if you use wood screws to tighten, you should first use a wood drill to half the length of the screws themselves, and then screw the screws in In any case, do not use a mace to drive the screw directly.