Surface treatment also has a great impact on the fastening performance of fasteners

For surface treatment, people generally pay attention to beauty and anti-corrosion, but the main function of fasteners is to fasten parts, and surface treatment also has a great impact on the fastening performance of fasteners. Therefore, when selecting surface treatment, we should also consider the factor of fastening performance, that is, the consistency of installation torque and preload. A high-level mechanical equipment designer should not only consider the design, but also pay attention to the assembly process and even environmental protection requirements.

According to the above factors, the commonly used coatings of some fasteners are briefly introduced below for the reference of fastener practitioners. Phosphating is cheaper than galvanizing, and its corrosion resistance is worse than galvanizing. Oil should be applied after phosphating, and its corrosion resistance is closely related to the performance of the oil applied. There are two commonly used phosphating methods for fasteners, zinc phosphating and manganese phosphating. Zinc phosphating has better lubrication performance than manganese phosphating, and manganese phosphating has better corrosion resistance and wear resistance than zinc plating.

It is often used for the connection of some important parts, such as connecting rod bolts and nuts of engine, cylinder head, main bearing, flywheel bolts, wheel bolts and nuts, etc. Building a green manufacturing system, building green factories, and realizing clean production, waste recycling and low-carbon energy are one of the important strategies for China's manufacturing 2025 to achieve "manufacturing power" and "manufacturing power".

After the paperless management of production documents, the staff can quickly query, browse and download the required production information at the production site. The data generated in the production process of Dalian sand blasting outsourcing can be archived and saved immediately, which greatly reduces the manual transmission and circulation based on paper documents, so as to eliminate the loss of documents and data, further improve the production preparation efficiency and production operation efficiency, and realize green and paperless production, Improve the ability of precision manufacturing, agile manufacturing and transparent manufacturing.

What should be paid special attention to in Dalian fast and slow wire cutting processing is that the environment of the traditional electroplating workshop is very poor, the working site is humid, the equipment is prone to corrosion, and it is also easy to cause electric shock accidents and fires. Moreover, most of the electroplating manufacturers are small in scale, have simple equipment, lack of mechanical equipment, and poor labor protection conditions. For the environment, there are more dust hazards, fire and explosion hazards, electric shock hazards and other hazards, such as ultrasonic cleaning Noise hazards such as compressed air drying, mechanical injury and lifting injury. Therefore, the state has repeatedly ordered electroplating enterprises with serious pollution to rectify within a limited time and urge them to adopt more environmentally friendly surface treatment technology.