The use and quality of combined screws

The application of combination screws is relatively wide. The structure of the combined screw is: the screw is equipped with only one spring washer or one flat washer, or it can also be equipped with only two components of a spline. Such a combination screw is still firm when fixing an object, and the fixed object of the combination screw is not easy to fall off slowly due to vibration.

The use range of combination screws is very wide and has been used in many countries all over the world. Therefore, different countries will have different strength grading plans, but their materials are mainly steel and stainless steel. The combination screw is a special type of screw. On the contrary, there are still differences. The next step is to understand the purpose of the combination screw.

Use of combination screws

High-strength large hexagon head bolt combination screws for steel structures are mainly used for railway and highway bridges, boiler steel structures, factories, high-rise civil buildings, tower structures, hoisting machinery and steel structures that require friction-type high-strength steel structures . If the strong bolt combination is a screw. It is characterized by a bolt, which is called a dodecagon at the end of the bolt. When installing, a special electric wrench must be used. There are two socket heads on the top and bottom. One is installed on the hexagon of the nut, and the other is installed on the decagon of the outer hexagonal screw. When tightening, apply a clockwise torque to the nut, and an equal counterclockwise torque to the dodecagon of the bolt, so that the end of the hexagonal screw and the neck of the dodecagon are torsionally sheared until the neck is sheared Cut until it's cut. At this point, the installation is over. The torsion shear type high-strength hex screw is a one-time-use screw and generally cannot be disassembled after installation.

Generally, the use of combined screws is widely used in electrical, electricity, machinery, electronics, household appliances, furniture, ships, etc. But the above said that different combination screws have different functions. For example, Phillips pan head combination screws are often used in small electronic products. Larger cross external hexagonal combination screws are used for larger electrical products, such as inverters. For larger inverters, there are many crossed hexagonal combination screws. Hit the inverter housing. Relax the tightening effect. For example, two combination screws with splines are used on the inverter, whose function is to destroy the paint, so that all two combination screws on the chassis panel are energized. There are also two combination screws with square crimping, which themselves are two combination screws with pan-head screws and square pads. Usually used on the terminal surface. This role is for wiring and crimping.