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在齿轮加工过程中,内孔及端面的磨削是重要工序之一,这道工序在很大程度上决定了齿轮的质量和齿形精加工的经济性。一般如果能保证节圆与内孔同心度在0.04～0.06mm以内,齿形不进行磨齿,也能得到较好的啮合精度和降低啮合噪音。这道工序的关键是必须采用以齿轮节圆来定位的专门夹具。所谓节圆定位准确地说是利用齿侧来定位。为了消除齿形过渡曲线对定心精度的影响,并使工件装夹方便,要求滚珠(柱)与齿侧的接触点离齿顶的最小距离Δh≥0.4m_os,其中M_os为齿轮的端面模数。
In the gear processing, the inner hole and the end face grinding is one of the important processes, this process largely determines the gear quality and profile economy of the finishing. Generally, if the concentricity of the pitch circle and the inner hole can be ensured within 0.04 ~ 0.06mm, the tooth shape will not be grinded, and the meshing precision will be better and the mesh noise will be reduced. The key to this process is the need to use a special pitch with a pitch circle to fix the fixture. The so-called pitch circle positioning is precisely the use of tooth side to locate. In order to eliminate the influence of the transition curve of the tooth profile on the centering accuracy and facilitate the clamping of the workpiece, the minimum distance Δh≥0.4m_os between the contact point of the ball (column) and the tooth flank from the tooth top is required, where M_os is the face modulus of the gear .