The contact area mainly refers to the actual contact between the two bevel gears during meshing.The requirements for contact area of different gear systems are different. For Klingenberg spiral bevel gears, the position of contact area is mainly distributed in the middle of the convex and concave surface. When the bevel gear teeth are loaded, the contact area will extend along the gear.The variation of contact area of Klingenberg spiral bevel gear before and after being stressed is shown in the figure.
By analyzing the changes of contact area of Klingenberg spiral bevel gear under load, it can be concluded that contact area of Klingenberg spiral bevel gear has a great influence on the stability, smoothness and service life of bevel gear engagement.
To ensure the production quality of Klingenberg spiral bevel gears, it is necessary to scrape the slight deformation of the bevel gear teeth surface caused by heat treatment after carburizing and quenching (HRC58-62) during the production process and to correct the necessary contact area to improve the production quality of the bevel gears.
In the production of Klingenberg spiral bevel gears, to ensure the processing quality of bevel gears, it is necessary to ensure high-precision processing equipment and reasonable production process.In addition, in the design of such bevel gears, the number of teeth of two gears in a gear pair needs to be avoided to be designed as a multiple of 5. This is because the internal cutter head and the external cutter head are designed as five cutter heads during the processing of spiral bevel gears. When the number of teeth is designed as a multiple of 5, the cumulative errors generated during gear machining can not be eliminated.As a result, the processing error of bevel gears is large, and the schematic diagram is shown in Figure 2.
According to our factory’s processing practice for Klingenberg spiral gear, there are always some errors in the process of gear machining, so the contact area of bevel gear machined needs to be corrected to ensure its processing quality.