Process and apparatus for milling gears to generate a bevel gear, and spiral bevel gear tool

摘要

"PROCESS AND APPLIANCE FOR MILLING GEARS TO GENERATE A CONNECTIVE GEAR, AND, MILLING TOOLS OF SPIRAL GEAR GEARS". The opening of teeth in bevel gears must be carried out with high efficiency and low cost. For this purpose, when a bevel gear is generated using an annular milling tool (21) having a blade material (23) constructed of a quick tool steel mounted on a main body (22), the blade material (23) is coated with at least one film layer of a composition substantially comprising (Ti ~ (1-x) ~ A1 ~ x ~) (N ~ y ~ C ~ (1-y) ~) (where 0.2 243 x 243 0.85, 0.2 243 y 243 1.0), and dry milling is carried out at a cutting speed in the range of 20 to 200 m / min without using a cutting oil. With this process, teeth can be generated at a greatly improved cutting speed without using any expensive tools such as sintered hard carbide, thereby realizing an efficient production of a bevel gear at a reduced cost.