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.
How Much Do You Know About Industrial Lubricants?July 1, 2022"Industrial lubricants are used in a wide range of base oils, such as pure mineral oils, PAO poly ether synthetic oils, alkylbenzene oils, and biodegradable lipid oils.When they become industrial...view
Oil Standard For Construction MachineryJuly 1, 2022Construction machinery oil refers to the lubricating oil specially used for large excavators, loaders, hoisting machines, forklifts, cranes, concrete mixers, road rollers and other large machinery equ...viewMetal Packaging Half-year Report: Profits Soar Industry Says Future Growth Is ExpectedJune 30, 2022According to the proportion of sub-categories in the cumulative operating income of the national packaging industry in 2020 by The China Packaging Association, the cumulative main business income of m...viewNotice On The Key Work Of Brand Construction In The Packaging Industry In 2021July 1, 2022Packing Association of provinces, autonomous regions, municipalities directly under the Central Government and cities under separate state planning (Packing Association and Packing Office), China Pack...viewProblems And Technical Solutions That Are Prone To Water-based Steel Drum PaintJuly 1, 20221. ShrinkageIn the process of painting or drying of the paint film, wrinkles or shrinkage and deformation appear on the surface of the topcoat. This kind of defect is the most common in alkyd paint re...view
SWIFT Code Or IBAN?June 30, 2022Doing international trades may come down to bank transfer, which may need your bank SWIFT Code or IBAN. The two numbers are chosen among different regions across the world. The answer is as below:IBAN...view
EN
ko 
fr 
de 
es 
it 
ru 
pt 
ar 
vi 
th 
