Machining method for multi-gear

Abstract

The invention discloses a processing method of a multi-link gear, which comprises the steps of blanking, forging heat treatment, turning processing, inner hole grinding, tooth processing, shot peening treatment, fine grinding of the tooth and the like. The processing method of this multi-link gear adopts the method of hole positioning, and realizes the matching installation and connection between the small gear and each large gear through positioning pins and set screws, so the coaxiality is effectively guaranteed, and better processing accuracy is achieved. , so as to achieve better meshing conditions for multiple gears and reduce meshing noise; because welding is not used for connection, welding deformation and welding internal stress can be avoided; because shot peening is carried out before fine grinding, it can eliminate The mechanical internal stress of the rough machining of the teeth, thereby prolonging the service life of the multiple gears.

Description

technical field [0001] The invention relates to a gear processing method, in particular to a multi-connected gear processing method, and belongs to the technical field of gear machining. Background technique [0002] Gear transmission is the most widely used form of transmission in mechanical transmission. Because of its characteristics of accurate transmission ratio, high efficiency, compact structure, reliable operation and long life, it is widely used in modern machine tools and instruments. [0003] As the basic element of gear transmission, the gear is a mechanical element with teeth on the wheel rim that can continuously mesh to transmit motion and power. At present, the structure of the single ring gear is the best and the easiest to process. Any kind of tooth shape processing method can be used. Machining the wheel part, and for multi-ring multiple gears such as double or triple, it usually consists of a pinion and one or more large gears sleeved on the outside of th...

AI Technical Summary

Problems solved by technology

[0003] As the basic element of gear transmission, the gear is a mechanical element with teeth on the wheel rim that can continuously mesh to transmit motion and power. At present, the structure of the single ring gear is the best and the easiest to process. Any kind of tooth shape processing method can be used. Machining the wheel part, and for multi-ring multiple gears such as double or triple, it usually consists of a pinion and one or more large gears sleeved on the outside of the pinion, and the pinion usually includes an inner hole for installing the gear shaft , the inner hole of the pinion usually includes a middle inner hole and end inner holes arranged at both ends of the middle inner hole. The processing of the ring tooth shape is usually difficult to machine because of its shape and position, and usually only the processing method of gear shaping can be used

[0004] However, the processing accuracy of gear shaping is far lower than that of grinding gears. Therefore, the processing method of multiple gears widely used at present is to firstly carry out fine grinding of the large and small gear blanks with split structure, and then weld them after assembly. It is fixed and connected as an integrated structure. The multi-connected gears processed by this method of assembly after finishing and welding and fixing are not only easy to cause misalignment due to welding deformation, but also the internal stress of welding cannot be removed. At the same time, the simple fine grinding There is still mechanical internal stress in the teeth, so it is easy to cause poor meshing conditions of multiple gears, resulting in high noise and short service life

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