Manufacturers of Agricultural Chain remind mechanical chains to pay attention to the fact that after the gear is subjected to high-frequency treatment, the hardness of the tooth surface and the tooth top will meet the requirements for use, but the tooth root part can not reach the quenching hardness, and the hardness is lower than carburizing. Hardened hardness. After high frequency quenching, the accuracy of gears decreases. When used as a high-precision gear, the gear needs to be ground. Circular gear transmission uses convex-concave arcs for gear transmission. During no-load, the two tooth profiles make point contact. During the meshing process, the contact point moves along the axis direction, and the continuous transmission is obtained by the longitudinal coincidence degree being greater than 1. It is characterized by high contact strength and bearing capacity, easy to form oil film, no undercut phenomenon, uniform tooth surface wear, and good running-in performance. The single-stage transmission ratio can reach 6 and the maximum can reach 8. The transmission efficiency is generally 0.94 to 0.98. Straight bevel gear transmission can reach 370 kilowatts, and the peripheral speed is 5 meters per second. The helical bevel gear transmission runs smoothly and the gear bearing capacity is high, but it is difficult to manufacture and has fewer applications.

Among the measuring instruments, there are about 10 assembly test instruments and worm gear checkers, and there are no more than 50 transmission assembly test stands and drive axle test stands nationwide. Many factories do not have the necessary instruments such as noise meters and torsional vibration meters. In the gear manufacturing process, the required quality of product parts, components and assemblies must be strictly tested and controlled, so advanced and applicable measurement technology and instruments are necessary conditions. Regardless of whether gear transmission parts are self-made or purchased in various machinery factories, they should be equipped with gear, thread and spline measuring instruments, otherwise the manufacturing quality of transmission parts cannot be controlled. At present, gears, threads, and spline measuring instruments from domestic Chengdu Tool Research Institute and Harbin Precision Measuring Instrument Factory can basically meet the requirements. It can be supplied domestically even for gear measuring centers, gear tool measuring centers, gear and worm gear inspection machines, and laser dynamic screw measuring machines. However, for users with high technical requirements and abundant financial resources, the introduction of foreign gear measurement centers can also be considered.

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