Generating And Experimental Research On The Grinding Surface Properties Of Spiral Bevel Gear

Spiral bevel gear is the basic component. it is used to realizemovement and power transmission of the intersection between the axisand cross axis. There are many advantages of spiral bevel gear whichhave high bearing capacity, high transmission efficiency, compactstructure, long life, little noise, so it is widely used in key components inthe industry such as aeronautics and astronautics, maritime, precisionmachine tools, motor transport. Gear grinding surface condition namelymicro-hardness, microstructure, grinding burn and crack of gear whichhas certain influence on wear resistance, fatigue resistance, corrosionresistance. In this paper, according to the machining principle and processcharacteristics of the spiral bevel gear, the grinding surface morphology isstudied in order to improve the surface quality of spiral bevel gear, themain research contents are as follows:Firstly, the finite element model of temperature field was establishedby SG grinding wheel to20CrMnTi arc tooth wimble gear form grindingand make simulation analysis on temperature field under differentgrinding process parameters on the influence of grinding burn.Throughthe method of experiments, on the basis of using automatic microhardness tester for the influence factors of spiral bevel gear grindingsurface micro-hardness, it was concluded that the changing rule of thesurface hardness gradient of spiral bevel gears by experimental tests. Thechanging rule of grinding tooth surface under different grinding depthsurface micro-hardness and same other grinding experiment conditions atthe same time, then the method of plating alloy layer on the tooth facegear to improve the surface hardness of spiral bevel gears was putforward.Microstructure transformation was one of the important indexes ofthe gear processing quality. Through metallographic microscopecharacteristics of spiral bevel gear grinding surface microstructure of testanalysis, it was concluded that gear grinding surface microstructure. By orthogonal experimental method, this paper analyzed the microstructureof different process parameters on the surface of spiral bevel gears, theoptimal process parameters were got through the range analysis and thereturn content mathematical model of the retained austenite in spiralbevel gear was established and made a comparison validation of themodel.Finally, Experiments were conducted to study the change ofmicrostructure of different degree of tooth and normal tooth big geargrinding burn by metallographic microscope and full automatic microhardness tester, surface micro-hardness and microstructure were analyzedafter the grinding burn surface micro-hardness influences on grindingburn and crack were verified by experiments and made a comparisonvalidation of influence of microstructure, surface micro-hardness changeon the grinding burn and cracks. Discussing the relationship betweenzone temperature and grinding burns under the dosage of grinding thegrinding.The critical conditions of production of grinding burn wasconcluded and some effective measures to prevent grinding burn andcracks were put forward.