Study On Spiral Bevel Gear Cutting On The Tracing Line

In this paper, applications and processing methods of spiral bevel gears havebeen introduced, which have standard spherical involute teeth theoretically. Due tothe theoretical error of existing processing methods, the theoretical teeth shape canhardly be machined. So it is necessary and meaningful to theorize and explain a newconcept of spiral bevel gear machining--spiral bevel gear cutting on the tracing line.The principle of this new cutting method is introduced. The tooth face is generatedby a moving line, while moves in tangent plane of the basic cone, while the basiccone rotates round its own axis. If this line becomes the blade of cutter, the toothface can be made out. The processing method of tracing line on cutter movingrelatively against basic cone is defined spiral bevel gear cutting on the tracing line.There are core issues of this processing method. First, how to imply the relativemotion between the tracing line and the basic cone. Second, how to get a tracingline on cutter. These problems have been solved in this paper. Cutting machines,cutting methods and processes for helical and Archimedes spiral teeth bevel gear areintroduced detailedly. Helical gears have been cut and meshed as examples toexperiment this processing method. It shows than spiral bevel gears cutting on thetracing line is correct, reasonable, feasible and effective theoretically andexperimentally. In this way, an efficient and precise technical means of processing ispossible, as well as lower cost and more convenient to use. It is also a theoreticalinnovation for the usage of tracing line instead of shaping surface. This new theorymust promotes new cutting equipments and methods, which provides a new way ofgear machining and lead to independent innovation. Because of the similarity ofinvolute teeth generating, this processing method can be used not only to all kinds ofbevel gears but also to hypoid gears.