This technical requirement specifies the technical requirements for the manufacturing, installation and inspection of the steel structure high-strength bolt auxiliary connectors of mobile machinery and equipment. The content not specified in this technical requirement shall be implemented in accordance with relevant national standards. This technical requirement applies to mobile mechanical steel structures that need to be connected by high-strength bolts.
Joint surface treatment
(1) Friction type high-strength bolt connection requires close contact with the joint surface at the joint and sufficient friction coefficient. When the design drawing does not specify the treatment requirements of the joint surface, the treatment shall be carried out according to the following regulations: sandblasting or shot blasting the high-strength bolt joint surface to remove rust, oil and other impurities on the surface to reach the Sa2.5 level standard , The roughness is 50~75μm, and the friction coefficient shall not be lower than 0.40. When there are provisions in the drawings, follow the provisions of the drawings.
(2) After treatment, the friction surface of the high-strength bolt connection should be protected from dirt and oil. It is strictly forbidden to make any mark on the friction surface of the high-strength bolt connection. It is necessary to prevent contamination of the connecting surface during storage in the factory, or during transportation or storage at the installation site. The installation unit should pay special attention to the cleanliness of the connection surface of the connection plate of the high-strength bolt and the parent body and the characteristics of the friction surface. It is not allowed to use a grinder to polish the connecting surface of the connecting plate and the connecting surface of the mother body.
Introduction To Tin PlatingJune 30, 2022Tin plating and its alloy are two kinds of coating with good weldability and certain corrosion resistance. It is widely used in electronic components and printed circuit boards. In addition to physica...view
Overview Of National Packaging Industry Operation In 2020July 1, 2022In 2020, there will be 8,183 enterprises above scale in China's packaging industry (all industrial legal person enterprises with an annual revenue of 20 million yuan or above), 267 more than last ...view
Benefits and Advantages of Plastic Barrels and IB Ton BarrelsNovember 10, 2023Plastic barrelsAre you looking for barrels that can store chemicals, food, drugs, etc.? Polyethylene barrels, also known as plastic barrels, are a great choice for you. Here are some things you need t...view
A Guide to Steel DrumsJune 16, 2023Steel drums are some of the most versatile and robust containers in popular usage throughout many industrial and commercial sectors. They can be found in warehouses and transport depots across the wor...view