OPTIMIZATION OF GRINDING WHEEL CHARACTERISTICS AND CUTTING PARAMETERS WHEN RELIEVING GRINDING THE MILLING TEETH FOR MILLING CURVED BEVEL GEAR ACCORDING TO SURFACE ROUGHNESS CRITERION

Abstract

Surface roughness is one of the criteria to evaluate the quality of the part's surface after machining, especially the Archimedean surface roughness directly affects
on the quality of the cutting teeth, the cutting properties of the cutting teeth and the quality of the cutting teeth tooth rib of the Gleason bevel gear after machining.
In this study, Hai Duong grinding wheel was selected with the graininess grinding wheel of (G = 80, 100, 120) and the grinding wheel hardness of (Hđ = MV2,
MV1, TB2) to machine the bevel gear milling teeth. The cutting parameters were selected including the grinding wheel velocity of (Vđ = 16m/s, 20m/s, 24m/s) and
feedrate of (S = 2.08m/min, 3.12m/min, 4.16m/min). The optimization process is carried out to find a solution to ensure a harmonious relationship between the input
parameters (G, Hđ, Vđ, S) and to meet the requirement of Acsimet surface quality according to the surface roughness criteria of the milling teeth after machining.
Taguchi method is used to design the experimental matrix L27 with 27 experiments. The results showed that the optimal set of parameters is G = 120, Vđ = 24m/s,
S = 2.08m/min, and Hđ = MV2. The optimum roughness value of surface roughness (Ra) was determined to be 0.188 µm. The verification experiments were conducted
with the optimal input parameter values, the average value of measured results of surface roughness was Ra = 0.197µm. The difference between the optimal
calculated value and experimental value is 4.56%.
The experimental results show that the optimal set of parameters including G = 120, Vđ = 24m/s, S = 2.08m/min, and Hđ = MV2 can be applied when relieving
grinding the Archimedean surface of curved bevel teeth of Gleason system gears to ensure the required surface roughness and reliability.