GB1472628A - Apparatus for testing profiles - Google Patents

Abstract

1472628 Gear testing apparatus MAAG GEAR WHEEL & MACHINE CO Ltd 10 Sept 1974 39508/74 Heading G1M Apparatus for testing the profile of a gear tooth comprises a probe 10 carried by a first displaceable member 11 mounted on a second displaceable member 5, means 14 for biasing the probe'against the tooth flank, drive means 6 for displacing the member 5 to effect movement of the probe over the flank, measuring means arranged to provide signals representing the relative movement between the two members 5, 11 and the movement of one of the two members 5, 11 relative to a fixed point, and means 9 for comparing the signals from the measuring means and reference signals provided in a predetermined programme. In Fig. 1, a table 3 adjustable in two orthogonal directions carries a member 4 along which the member 5 is movable in the X direction by means of a motor 6. Member 11 is pivotally mounted on member 5. The positions of members 5 and 11 are measured electronically and transmitted to a digital computer 9 where they are compared with reference values. Gear data, a programme for calculating the reference values, permissible tolerances and the initial and final measuring positions are introduced into unit 8, and the results of the comparisons in computer 9 are transmitted to unit 8 which produces a printed record or a punched tape. In the modification shown in Fig. 2, probe 17 is mounted on a member 16 slidably mounted on a member 19 which is rotatably mounted on member 5 which is fixed relative to table 3. In a modification of the apparatus of Fig. 1, Fig. 3 (not shown), member 5 is movable in the direction of a tangent to the tooth at point PA. In the further modification of Fig. 4, probe 10 is mounted on an arm 26 which is mounted on a member 28 movable in the Y direction, member 28 being mounted on member 25 movable in the X direction. Arm 26 may be angularly adjusted on member 28.