剃齿过程中，啮合周期在节圆附近出现单点接触即三点啮合区域，是导致剃齿齿形中凹误差的重要原因之一。基于负变位剃齿和平衡剃齿的原理，对负变位剃齿刀进行非等边齿形设计，通过减小副工作面的最大曲率半径，使主、副工作面同时啮入，实现平衡剃齿，有效地消除了节圆附近三点啮合区域，改善了该区域轮齿间啮合力不均匀的情况。以传动误差曲线幅值作为量纲，将非等边剃齿刀与负变位剃齿刀进行对比分析，结果表明：非等边剃齿刀能够优化负变位剃齿的不足以及平衡剃齿条件难以实现的缺点，使剃齿啮合过程轮齿间啮合力趋于平稳，实现平衡剃齿，降低传动误差幅值，为消除剃齿中凹误差提供了新的技术思路。
In the process of gear shaving, the single point contact occurs near the pitch circle in the meshing cycle, which is the three-point meshing area, is one of the important reasons for the profile-concave-error of the shaving tooth. Based on the principle of negative displacement shaving and balance shaving, the unequilateral profile design of the negative displacement shaving cutter is carried out by reducing the maximum radius of curvature of the secondary working face so that the main and auxiliary working surfaces are simultaneously engaged and balanced shaving is achieved. The three-point meshing area near the pitch circle will be effectively eliminated and the situation that the region of the teeth between the meshing force is not uniform will be improved. Taking the amplitude of the transmission error curve as the dimension, the unequilateral profile shaving cutter and the negative displacement shaving cutter are compared and analyzed. The results show that the unequilateral profile shaving cutter can optimize the negative displacement shaving and balance the shortcomings which is difficult achieved in the shaving conditions, so that the meshing force in the process of meshing tends to be smooth, and the balanced shaving is achieved, and the amplitude of transmission error is reduced. A new technical idea is provided to eliminate the profile-concave-error of the shaving tooth.
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