The bevel gear is one of the important types of all wheel types. This is a gear where the axes of the two shafts intersect, and the gear surfaces of the gear wheels themselves have a conical shape. This type of gear is most often mounted on shafts that are 90 degrees apart, but can be designed to work at different angles.
The expression "bevel gears" is used as a general description for direct and spiral bevel gears, as well as hypoid gears. If the axes of the gears and gears do not intersect, but have a distance in space, a gear gearbox is called a hypoid gearbox. The name comes from the hyperbolic form of "height cones". To simplify, blanks are still made with a conical shape.
Heat treatment has a great effect on bevel gears. But what is heat treatment? This is a process in which solid steel or components made of steel are treated by heating to obtain the desired properties, such as softening, normalizing, stress relieving, hardening. Heating for the purpose of hot working, as in the case of rolling or forging, is excluded from this definition. That is, heat treatment is mainly a method used to change the physical and sometimes chemical properties of a material.
Heat treatment follows a soft cut. Commonly used low carbon steel should be cemented on the surface by hardening. Heat treatment is completed by a quenching operation, which provides a surface hardness in the range from 60 to 63 Rc (Rockwell C). Gear can be 3 Rc harder than a ring to balance wear and reduce the risk of clogging. The core material lasts softer and more plastic, with a hardness ranging from 30 to 40 Rc.
Heat treatment (for example, a salt bath, a furnace, or a continuous furnace) and the differences between the charges of a clean material have a significant effect on gear distortion. Eradication from heat treatment are crucial for a final hard finish. In addition to the distortion of the empty body, heat treatment also causes distortion of individual teeth. The angle of the helix changes, the curvature of the length of the flange decreases and the pressure angle changes. For best results, you should pay attention to the processing and processing of parts through the furnace. Hardening ring gears with a hardening press ensures good flatness of gear wheels with heat treatment. For example, a hard finish of bevel gears should provide a good surface finish and eliminate flange deformations.
