Tooth profile grinding device, shaving margin distribution device and shaving margin distribution method null for

摘要

PURPOSE: To distribute grinding allowance with high accuracy and automatically by allowing a gear to perform the rotation related to indexing and relative traverse of the gear in time, by means of numerical control by a computer. CONSTITUTION: A probe having a spherical tip B is positioned in a space between tooth flanks on both sides of a tooth space G to rotate a gear in one direction until one tooth flank Fa activates the probe, and the angular position (Oa deg.) of the gear at the moment is recorded in a computer. Next, the direction of rotation of the gear is reversed, the gear continues the rotation until the adjacent tooth flank Fb activates the probe, and the angular position (Ob deg.) of the gear at the moment is recorded in the computer. The difference between the two rotational positions, namely Oa deg.-Ob deg. is calculated, and the gear is driven in opposite direction under computer control by the length of an arc equal to the half of the value calculated. At this time, the center of the spherical tip part B, and therefore a grinding wheel are aligned with the tooth space G, and thus grinding allowance is precisely distributed.