Adjust the radial tool position S1 when machining the small wheel. The table lists the different values of the radial tool position of the small wheel and studies its influence on the contact condition.

According to the above table, TCA analysis is made for the radial cutter positions of the small and medium wheels, and the contact conditions are shown in the figure.

By observing the change of contact area and motion curve, when the radial cutter position of small wheel machining is adjusted in the positive direction, the inner diagonal contact is generated, and the fishtail contact phenomenon is reduced; when the radial cutter position of small wheel machining is adjusted in the negative direction, the inner diagonal contact phenomenon is reduced, and the outer diagonal contact is generated, and the fishtail contact changes; By observing the change of the slope k of the motion curve when the abscissa is 0, the radial tool position of the small wheel machining is adjusted in the positive direction, the slope k of the motion curve when the abscissa is 0>0, and the contact area moves towards the tooth top; The radial cutter position of small wheel machining is adjusted in the negative direction, the slope of the motion curve when the abscissa is 0 is k<0, and the contact area moves to the tooth root.