What is the difference between standard gear and shift gear?

Shifting gears is achieved by changing the standard tool pairgearThe tooth profile cut by the radial position of the blank or changing the tooth groove width of the standard tool is a gear with a non-standard involute tooth profile. 

At the position of processing standard gears, if the gear cutter is far away from the gear by a distance of xm, a positively shifted gear will be obtained;

If the gear cutter is close to the gear for a distance of xm, a negative displacement gear is obtained.

Among them, x is the displacement coefficient, when the displacement is negative, it is a negative value, and when the displacement is positive, it is a positive value; m isGear module.The displacement is the product of x and m.

Compared with standard gears, the modulus, the number of teeth, the pressure angle, the diameter of the index circle and the tooth pitch of the displacement gear are unchanged.

However, in the positive displacement, the tooth profile curve segment is far from the base circle, the addendum circle and the tooth root circle also increase correspondingly, the tooth root height decreases, the tooth tip height increases, the indexing circle tooth thickness and the tooth root circle tooth The thickness is increased, but the tooth top is easy to become sharp;

In negative displacement, the tooth profile curve segment is closer to the base circle, the addendum circle and the tooth root circle are correspondingly reduced, the tooth root height increases, the tooth tip height decreases, the indexing circle tooth thickness and the tooth root circle thickness All decrease.

The above is a description of the difference between standard gears and shifted gears, including but not limited to, if there are any deficiencies, please add them. If you have relevant processing requirements, you can consult EP for free.