Method for measuring the tooth shape of a helical gear

Abstract

This provides an improved method for measuring and analyzing the shape of gear tooth profiles. [Solution] The present invention relates to a method for measuring the shape of the teeth of a helical gear, wherein a sensor is guided along at least one measurement path on the tooth surface of the tooth profile to measure the shape of the tooth surface at multiple points along the measurement path, the measurement path extends obliquely to the tooth surface in at least a portion of the area, and scans the meshing area on the tooth surface in the tooth profile direction and the tooth trace direction over at least 50% of its range.

Claims

1. A method for measuring the shape of the teeth of a helical gear, particularly the shape of the teeth of a helical gear having a cylindrical macro-shape, wherein a sensor is guided along at least one of the measurement paths on the tooth surface of the tooth so as to measure the shape of the tooth surface at multiple points along the measurement path, The aforementioned method, The method is characterized in that the measurement path extends obliquely to the tooth surface in at least a partial region, and scans the occlusal region of the tooth surface over at least 50% of the length extending in the tooth profile direction and the tooth trace direction.

2. In the method according to claim 1, At least one measurement path has a first and second sub-region extending obliquely over the tooth surface, and in the section located between the first and second sub-regions, the at least one measurement path extends at an angle different from that of the first and / or second sub-regions, and / or at an angle of up to 20 degrees, preferably up to 10 degrees, with respect to the tooth profile direction or tooth trace direction, preferably extending in the tooth profile direction or tooth trace direction. and / or A method wherein the at least one measurement path extends from a first corner region of the occlusal region of the tooth surface to a diagonally opposite corner region of the occlusal region, wherein the corner region preferably includes a range of up to 25%, preferably up to 10%, of the height and width of the occlusal region around each corner, and the at least one measurement path more preferably extends from a first corner region of the occlusal region on the tooth surface to a corner diagonally opposite to the occlusal region.

3. In the method according to claim 1 or 2, A method by which the position and / or trajectory of at least one measurement path is determined according to the macromorphology of the tooth profile and / or the tooth profile and the mating tooth profile, in particular a gear stage having a mating gear, and in particular according to the overlap ratio, meshing area, contact path, tooth width and / or reference helix angle.

4. In the method according to any one of claims 1 to 3, A method wherein a mating tooth profile, particularly a theoretical contact path with a mating gear, is determined, and the trajectory of the measurement path is determined based on the contact path, and / or at least one measurement path substantially extends along the theoretical contact path with the mating gear, wherein the contact path with the mating gear is preferably defined by the trajectories of points on the contact line between the tooth profile and the mating gear during their rotation, which divide the contact line into predetermined ratios with respect to its length, and the contact path with the mating gear is particularly defined by the trajectories of the midpoints of the contact line.

5. In the method according to any one of claims 1 to 4, The tooth surface is measured along a plurality of measurement paths that extend obliquely to the tooth surface in at least a portion of the region and preferably extend and / or are determined according to any one of claims 2 to 5, preferably a plurality of measurement paths are used, each extending along a theoretical contact path with the mating gear, each contact path dividing the contact line in different proportions of its length, and / or all measurement paths have the same endpoint, and the measurement is preferably performed in both directions.

6. In the method according to any one of claims 1 to 5, A method of measurement performed on a gear measuring machine having an input function that allows pre-setting the position and / or trajectory of at least one measurement path and / or the number of measurement paths per tooth surface.

7. In the method according to any one of claims 1 to 6, A method for measuring a plurality of tooth surfaces of the tooth profile, each extending obliquely to the tooth surface in at least a partial region and preferably extending according to any one of claims 2 to 5 and / or along a plurality of measurement paths determined.

8. In the method of claim 7, A method in which multiple tooth surfaces are measured along the same measurement path, and in particular along a measurement path that extends along the theoretical contact path with the mating gear, which is determined by the trajectory of the midpoint of the contact line between the tooth profile and the mating gear.

9. A method for analyzing the shape of a helical tooth, in particular a method for analyzing the undulation and / or vibration of the shape of a helical tooth, Preferably, the swell is analyzed along the path, for example by decomposing the swell into different frequencies and / or by obtaining the spectrum of the swell amplitude along the path. The aforementioned method, A method for analysis characterized in that the tooth shape is observed along at least one path extending obliquely to the tooth surface in at least a partial region, preferably scanning the occlusal region on the tooth surface over at least 50% of its range in the direction of the tooth profile and the tooth trace line.

10. In the method according to claim 9, The method wherein the at least one path has a first and second sub-regions extending obliquely on the tooth surface, and between the first and second sub-regions there is a region where the at least one path extends at a different angle from the first and / or second sub-regions and / or extends at an angle of up to 20°, preferably up to 10°, with respect to the tooth profile direction or tooth trace direction, preferably extending in the direction of the tooth profile direction or tooth trace direction, and / or the at least one path extends from a first corner region of the occupying region of the tooth surface to a diagonally opposite corner region of the occupying region, the corner region preferably includes a range of up to 25%, preferably up to 10%, of the height and width of the occupying region around each corner, and the at least one path preferably extends from a first corner of the occupying region of the tooth surface to a diagonally opposite corner region of the occupying region.

11. In the method according to claim 9 or 10, A method by which the tooth shape is measured for analysis, the tooth shape identified by the measurement is analyzed, the tooth shape is examined for analysis, preferably along at least one path where the tooth profile is measured, preferably by the method of any one of claims 1 to 8.

12. In the method according to any one of claims 9 to 11, A method in which the shapes of multiple tooth surfaces are superimposed along paths on each tooth surface according to the pitch of the tooth profile for analysis, preferably in which multiple tooth surfaces of the tooth profile are measured along at least one measurement path, and the shapes of the tooth surfaces measured along each measurement path are superimposed according to the pitch of the tooth profile for analysis.

13. In the method according to any one of claims 1 to 12, A method in which both gears are measured and / or analyzed for the analysis of the gear stage, particularly along the center contact path, and / or the two gears are measured and / or analyzed during the manufacture of the gear stage, and defective gears and / or gear stages are preferably replaced and / or sorted out, and preferably measurement and / or analysis is performed on all gear stages manufactured.

14. A gear measuring machine comprising a workpiece holder and a sensor capable of measuring the shape of at least one tooth surface of the tooth profile of a workpiece housed in the workpiece holder, a gear measuring machine incorporated into a gear machining machine, The gear measuring machine comprises one or more movable axes capable of guiding a sensor along at least one measurement path on the tooth surface of the tooth profile in order to measure the shape of the tooth surface at a plurality of measurement points along the measurement path, and the gear measuring machine comprises a control device configured to carry out the method according to any one of claims 1 to 13.

15. A computer program comprising instructions that cause a control device and / or computer of a gear measuring machine to perform the method described in any one of claims 1 to 13 when the program is executed by the control device and / or computer of the gear measuring machine.

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