双圆弧刀具加工直齿锥齿轮的啮合性能分析及优化
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中图分类号：TH132
Abstract： A method for milling/grinding straight-toothed bevel gears using high-eficiency double-arc cuting tools was proposed to improve their meshing performance. A double arc tool was used to simulate a crown-producing wheel，and tool trimming coefficients，the average radius of the cuter disk and the cutting edge angle were introduced to establish a straight bevel gear tooth face model that considered tooth profile and tooth direction trimming. According to the conditions of continuous tangency of two meshing gears，a tooth contact analysis model was established，and combined with tooth clearance，normal flexibility matrix and mathematical planning，a wheel tooth bearing contact analysis model was established. Then with the goal of achieving symmetry in geometric transmission errors and minimising fluctuations in load transmission errors，the tool profiling origin positions was adjusted and tool parameters were optimised. The geometric transmission errors and load transmission errors of the gear were compared before and after optimization.The example results show that the position of the tool reshaping origin affcts the symmetry of the geometric transmission errors；the larger the tool reshaping coeficient is，the larger the amount of tooth profilereshaping is，the amplitude of the geometric transmission errors and the amplitude of the load bearing transmission errors willincrease；with the decrease of the average radius of the knife holder and the increase of the blade angle，the amount of tooth profile reshaping is increased，and then the area of the tooth surface mark willbe reduced.After optimization，the amount of bearing transmission error fluctuation is reduced by 56.54% under the working load，which may efectively reduce the vibration excitation of the gear pairs.
Key words： dual interlocking circular cutter;straight bevel gear； tooth surface modification； meshing simulation；genetic optimization
0 引言
直齿锥齿轮适用于相交轴的运动和动力传动，具有结构简单、轴向力小、便于安装的特点，在航空、航天和汽车领域有着广泛应用。（剩余11367字）
