Study of tooth contact pattern depending on transmission geometry

Tooth wheels are among the most widely spread machine parts which are used in different machines and mechanisms, Consequently, increase of productivity and quality of their manufacturing is one of the major tasks facing technologists and producers of instruments all over the world. A variety of tooth wheels for helical gears have a different design form, manufacture of which requires a variety of different technologies, as well as a variety of gear-cutting tools based on third-class shaping schemes. Such transmissions are widespread in general mechanical engineering and are used in mechanisms with low capacities and significant gear ratios. The quietness and smooth operation of such transmissions is one of their main advantages. If the gear ratio is less than eight, then the tooth contact is point-like. The initial tooth contact occurs at a point, while significant sliding speeds occur in the contact zone, leading to intense wear of the teeth. Therefore, in this work, a helical gear train has been developed, which has a linear character of tooth contact at any gear ratio. The load capacity of gears and, above all, their wear largely depends on the size of the contact pattern. A contact pattern has been found in helical gears, as well as cylindrical-hyperboloid gears with various geometric and kinematic parameters. Evaluation of the influence of various factors on the size of the contact pattern has been determined experimentally. The dependence between the contact pattern area and the geometric parameters of the gears included in the gear transmission has been found.

The present study can be used when designing orthogonal helical gear transmissions of different types aimed at significant increase of their loading capacity and lasting use.

1. Gribanov V. M. Teoriya giperboloidnykh zubchatykh peredach [Theory of hyperboloidgears]. Lugansk, VNU im. V. Dalya, 2003, 272 p.

2. Suslov A. G. Kachestvo poverkhnostnogo sloya detaley mashyn [Quality of machine parts upper layer]. Moscow, Mashinostroenie, 2000, 320 p.

3. Mamlyuk O. V. Razvitie teorii formoobrazovaniya poverkhnostey rezaniem. Diss. dokt. tekhn. nauk [Development of theory of surface shape formation by cutting. Dis. dr. techn. sci]. Kiеv, 2007, 247 p.

4. Pavlov A. I. Sovremennaya teoriya zubchatykh zatsepleniy [Modern theory of gearing]. Khar'kov, HNADU, 2005, 100 p.

5. Kirichek A. V., Fedonin O. N., Soloviev D. L., Fedonina S. O. Expanding Technological Capabilities of The Combined Hardening of Steel by Deformation. X International Scientific and Practical Conference “Innovations in Mechanical Engineering” (ISPCIME-2019). MATEC Web of Conferences. 2019, vol. 297, no. 05004. Р. 6 (https://doi.org/10.1051/matecconf/201929705004).

6. Panteleyenko F., Ostanin O., Panteleyenko K., Petrishin G. New BoronContaining Materials for Surface Hardening. X International Scientific and Practical Conference “Innovations in Mechanical Engineering” (ISPCIME-2019). MATEC Web of Conferences, 2019, vol. 297, no. 05011, p. 7 (https://doi.org/10.1051/matecconf/201929705011).