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worm-gear: fix clearence and head computation

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looooo
2020-06-23 07:35:26 +02:00
parent ca3b8d3a5e
commit 1086bde4b1
1 changed files with 10 additions and 7 deletions
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17
freecad/gears/features.py
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@@ -641,13 +641,15 @@ class WormGear(object):
fp.beta = np.rad2deg(beta)
beta = np.pi / 2 - beta
r_1 = (d - (2 + clearence) * m) / 2
r_2 = (d + (2 + head) * m) / 2
r_1 = (d - (2 + 2 * clearence) * m) / 2
r_2 = (d + (2 + 2 * head) * m) / 2
z_a = (2 + head + clearence) * m * np.tan(np.deg2rad(alpha))
z_4 = m * np.pi
z_2 = z_4 / 2 + head * m * np.tan(np.deg2rad(alpha))
z_1 = z_2 - z_a
z_3 = z_4 - z_a
z_b = (m * np.pi - 4 * m * np.tan(np.deg2rad(alpha))) / 2
z_0 = clearence * m * np.tan(np.deg2rad(alpha))
z_1 = z_b - z_0
z_2 = z_1 + z_a
z_3 = z_2 + z_b - 2 * head * m * np.tan(np.deg2rad(alpha))
z_4 = z_3 + z_a
def helical_projection(r, z):
phi = 2 * z / m / t
@@ -657,9 +659,10 @@ class WormGear(object):
return np.array([x, y, z]). T
# create a circle from phi=0 to phi_1 with r_1
phi_0 = 2 * z_0 / m / t
phi_1 = 2 * z_1 / m / t
c1 = Part.makeCircle(r_1, App.Vector(0, 0, 0),
App.Vector(0, 0, 1), 0, np.rad2deg(phi_1))
App.Vector(0, 0, 1), np.rad2deg(phi_0), np.rad2deg(phi_1))
# create first bspline
z_values = np.linspace(z_1, z_2, 10)