Safe and reliable bolt tightening control-torque angle method
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- Time of issue:2021-11-19 16:07
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(Summary description)Bolt connection is a type of fasteners that are widely used in industrial production and life. The transportation in our lives, airplanes, automobiles, ships, machinery used in factories, electronic products used in life, etc., are all useful To the bolt connection. The main reason for choosing bolts is that the bolts are easy to disassemble. However, this feature will cause the bolts to loosen automatically in some cases, thereby losing the preload capacity.
Safe and reliable bolt tightening control-torque angle method
(Summary description)Bolt connection is a type of fasteners that are widely used in industrial production and life. The transportation in our lives, airplanes, automobiles, ships, machinery used in factories, electronic products used in life, etc., are all useful To the bolt connection. The main reason for choosing bolts is that the bolts are easy to disassemble. However, this feature will cause the bolts to loosen automatically in some cases, thereby losing the preload capacity.
- Categories:news
- Author:
- Origin:
- Time of issue:2021-11-19 16:07
- Views:
Information
Bolt connection is a type of fasteners that are widely used in industrial production and life. The transportation in our lives, airplanes, automobiles, ships, machinery used in factories, electronic products used in life, etc., are all useful To the bolt connection. The main reason for choosing bolts is that the bolts are easy to disassemble. However, this feature will cause the bolts to loosen automatically in some cases, thereby losing the preload capacity.
In the rapid work of parts, loose bolts can cause very serious consequences. If the bolts of a machine in operation are suddenly loosened, the whole factory will be brought to a standstill in the lighter case, and the economy will suffer. In the severe case, it will also cause hidden safety hazards to workers and safety accidents. For another example, in moving airplanes, cars, etc., loose bolts will threaten people's lives.
In our development history, safety accidents caused by a small screw can be said to be everywhere.
Case number one
On June 10, 1990, during the flight of British Airways Flight 5390, a windshield of the cockpit suddenly flew off, and the captain's upper body was sucked out of the plane. Fortunately, the deputy captain made an effort to land safely at Southampton Airport. The cause of the accident was that out of the 90 fixing screws of the windshield that had just been replaced in the cockpit, 84 were smaller or shorter than the standard.
Case 2
During the peak meal period at noon in September 2009, a ceiling fan in the canteen of Guangzhou University of Technology suddenly fell from the ceiling. The rapidly rotating electric fan injured and scratched two students. The cause of the accident was that the screws that fixed the electric fan fell off.
Case Three
At 18:35 on November 6, 2017, a female worker in a factory in Shenzhen was knocked down by another punch that was suddenly dumped next to him while operating a punch press. The rescue failed and died because there was no installation on the base of the collapsed punch press. There should be two bolts on the side of the anchor bolts, but only one bolt was installed, and it was loosened during long-term operation, and eventually the center of gravity was unbalanced and collapsed.
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