Development of modern technology for bevel gears machining

Abstract

The purpose of the work is to increase the efficiency of machining high-precision bevel gears with circular teeth of gearboxes and to improve their operational performance by using a tool made of superhard materials. To increase the operational performance of bevel gears, regular reliefs were formed on the internal base surfaces of the gears using a diamond ball with a radius of 1.5 mm. The tool performs a rotational motion at a speed of 50 rpm and a reciprocating motion for a length of 50 mm. Regular microrelief improves lubricating properties, reduces wear and increases the operational characteristics of gear parts. The cutting of the teeth was performed on a 3-coordinate gear milling machine model “HAAS UMC 1000”. The grinding of the teeth was carried out on a special CNC gear grinding machine mod. “Gleason 275”. Abrasive ruby-corundum rings with a diameter of 177.8 mm (7 inches) were specially developed for the “Gleason 275” machine. Studies have shown that in some cases, synthetic diamond and cubic boron nitride grinding wheels can be used for grinding bevel gears. The developed technology has made it possible to increase processing productivity by 1.5 times compared to existing technology, to improve the quality and accuracy of manufacturing engine gearboxes, and to ensure that they have the necessary technical and operational characteristics.