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1

Simulation of loading and wear rate distribution on cutting edges during gears hobbing

Hrytsay Ihor, Stupnytskyy Vadym, Topchii Vladyslav

Archive of Mechanical Engineering

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2021

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LXVIII, nr 1

51--76

EN

Results of complex mathematical and computer simulation of gear hobbing are given. A systematic approach to research allowed for the development of simulation models and sequencing of all aspects of this complex process. Based on the modeling of non-deformable chips, a new analytical method for analyzing hobbing has been proposed. The shear, friction and cutting forces at the level of certain teeth and edges in the active space of the cutter are analyzed depending on the cut thickness, cross-sectional area, intensity of plastic deformation and length of contact with the workpiece has been developed. The results of computer simulations made it possible to evaluate the load distribution along the cutting edge and to predict the wear resistance and durability of the hob cutter, as well as to develop measures and recommendations for both the tool design and the technology of hobbing in general. Changing the shape of cutting surface, or the design of the tooth, can facilitate separation of the cutting process between the head and leading and trailing edges. In this way, more efficient hobbing conditions can be achieved and the life of the hob can be extended.

2

Frezowanie zębów kół przekładni stożkowych o krzywoliniowej linii zębów na uniwersalnych obrabiarkach CNC

Siemiński P.

Mechanik

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2011

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R. 84, nr 2

147-147

PL

Opisano nową metodę nacinania zębów kół przekładni stożkowych systemu Gleasona. Odbywa się ona na uniwersalnych obrabiarkach CNC z użyciem typowych frezów palcowych i kulistych. Metoda ta może być stosowana do produkcji jednostkowej i małoseryjnej. Nie wymaga specjal- nych maszyn i urządzeń. Ścieżki narzędzi są generowane w systemie 3D CAM na modelach bryłowych uzębień.

EN

The paper describes a new method of cutting teeth of Gleason spiral bevel gears. The gears are cutted on the universal CNC milling machines using conventional end mills and ball mills. This method can be applied to the piece and small production. It does not require special machines and equipment. Tool paths are generated in a 3D CAM system based on solid models of gear teeth.

3

Environment-friendly cutting of cylindrical gears

Fratila D. F., Gyenge C., Ros O. R.

Archives of Materials Science

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2007

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Vol. 28, nr 1-4

45-50

EN

One of the main sources of environmental pollution during the machining processes is the huge amount of supplied cutting fluids. To avoid the problems caused by use of cutting fluids, considerable progress has been made in the last years in the field of near-dry machining. The conversion from conventional lubrication-cooling processes to minimal quantity lubrication methods demands new tasks classification in the tribological system in order to guarantee the process safety and product quality. In the paper the authors presents their theoretical and practical researches in the field of cylindrical gear milling using several kinds tools, lubrication and cooling methods, in order to evaluate the effects of some environment-friendly techniques.