A brief introduction to industry
First, the sleeve roller chain
The sleeve roller chain structure has two chain plates in each section, two pin shafts, two independent sleeves (the sleeve is not connected to the chain plate) and four snap rings. Sometimes the bushing is not needed, and the inner and outer chain plates are It is processed by stamping. The sleeve roller chain is characterized by wear resistance, high precision and fatigue resistance. It is suitable for working environment with frequent starting and with large impact load. It is suitable for conveying scraper conveyors below 500t/h. The problem: cumbersome, often used for heavy-duty transportation, used in the grain and oil industry to clean and slightly larger particles, the application range is narrow. In general, the production chain equipment is not in place, and the processing technology after stamping and forming is insufficient, which may cause chain breakage and wear and tear to seriously affect the life of the chain.
Second, the die forging chain
The die forging chain adopts a detachable chain of bar forging type, which is composed of a chain rod and a pin shaft. The chain rod is forged by die forging or rolling, and the chain rod is divided into a big head, a small head and The shaft is three parts. The characteristics of the chain process are: in the forging process, the fiber structure of the material has a certain strengthening effect: and the surface is treated with a low carbon table process, such as carburizing, which has high surface wear resistance and excellent synthesis. Mechanical properties, wear resistance, light weight, high strength, long service life: it is sliding friction when meshing with the head gear teeth and running on the guide rail.
The existing problem: some factory forging links can not be strictly controlled, in order to reduce costs, raw materials cut corners, seriously affect the strength and wear resistance of the chain, so that the life of the chain is greatly reduced.
Third, the welding bending chain
The welded bent chain chain consists of two chain plates, two pins, two sleeves (welded to the chain plate) and four snap rings. A series of curved chain links are composed of pin joints, and the connection between the plate holes and the pin shafts may be an interference fit or a mechanical lock, and the pin shafts and the chain plates are all subjected to special heat treatment for full hardening and partial hardening. Provides maximum impact resistance and optimum wear life, and the chain wings are bolted to the wear squeegee. The chain is sliding friction when engaged with the head gear teeth and on the rails.
The welded bent chain is characterized by the transport of strong impact and abrasive materials. Able to withstand long-lasting wear and high impact. The problem: high manufacturing requirements for manufacturers. If the surface treatment is not in place, the heat treatment process is not enough, the tempering and stress are not performed after welding, and the selection of the welding wire is not equal, which may easily cause the weld, the chain plate and the pin shaft to break.
