Polynomial degree in direction of the tooth depth (left flank)
| Symbol | - |
|---|---|
| Unit | - |
| Attribute-ID | surface_degree_nurbs_theta_flank_left |
| Numeric ID | 19461 |
| Value Type | PMInteger |
The parameters of the NURBS surface for the left and right sides of the pinion and gear can be specified individually for flank and root using the polynomial degree p and number of control points n. When specifying the polynomial degree and the number of control points, a distinction is made in the width and profile direction according to the coordinates R and θ for the flank and R and u in the root. This allows specific modeling of the surfaces (e.g., for tip and root relief), since discontinuities occur here mainly in the profile direction.
Please note:
- The number of control points must be at least 1 greater than the polynomial degree:
n ≥ p + 1. - For the tooth flank, the following must apply:
2 · nR · nθ < 2 to 3 · number of flank points from the manufacturing simulation or 3D point cloud. - For the tooth root, the following must apply:
2 · nR · nu < 2 to 3 · number of root points from the manufacturing simulation or the 3D point cloud.
The default values are: Polynomial degree = 3, Number of control points = 11.
Source: BECAL user manual and program documentation (in German).