127 lines
4.2 KiB
Python
127 lines
4.2 KiB
Python
"""Approximate long cylindrical pin with a shallow axial end recess."""
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from math import atan2, degrees, hypot, sqrt
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from build123d import Box, Cylinder, Location
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from shaft_common import cut_end_bore, export_horizontal, stepped_body
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OUTER_DIAMETER = 18.0
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LENGTH = 120.0
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RECESS_DIAMETER = 6.0
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RECESS_DEPTH = 5.0
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VIEWER_POCKET_CENTER = (50.72611906534796, 1.4055875192234604, 8.886497233823093)
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VIEWER_POCKET_WIDTH = 2.0
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VIEWER_POCKET_HEIGHT = 2.0
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VIEWER_POCKET_DEPTH = 1.0
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VIEWER_POCKET_OVERSHOOT = 0.2
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CIRCULAR_POCKET_CENTER = (68.62703575804954, 0.06569140145571417, 8.989927422862593)
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CIRCULAR_POCKET_NORMAL = (0.0, -0.156229, -0.987721)
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CIRCULAR_POCKET_DIAMETER = 8.0
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CIRCULAR_POCKET_DEPTH = 1.0
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CIRCULAR_POCKET_OVERSHOOT = 0.2
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COUNTERBORE_CENTER = (40.48928144002571, -7.833112445247494, 4.424155112072327)
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COUNTERBORE_NORMAL = (0.000061, -0.039505, -0.999219)
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COUNTERBORE_HOLE_DIAMETER = 3.0
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COUNTERBORE_DIAMETER = 6.0
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COUNTERBORE_DEPTH = 2.0
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COUNTERBORE_FACE_SELECTOR = {
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"reference_id": "f1",
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"face_index": 164,
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"row_index": 0,
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}
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COUNTERBORE_OVERSHOOT = 0.2
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COUNTERBORE_THROUGH_OVERSHOOT = 2.0
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def cut_viewer_rectangular_pocket(body):
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x_pos, y_pos, z_pos = VIEWER_POCKET_CENTER
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radial_length = hypot(y_pos, z_pos)
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normal_y = y_pos / radial_length
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normal_z = z_pos / radial_length
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rotation_x = degrees(atan2(-normal_y, normal_z))
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tool_depth = VIEWER_POCKET_DEPTH + VIEWER_POCKET_OVERSHOOT
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tool_center_offset = (VIEWER_POCKET_OVERSHOOT - VIEWER_POCKET_DEPTH) / 2.0
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tool_center = (
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x_pos,
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y_pos + normal_y * tool_center_offset,
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z_pos + normal_z * tool_center_offset,
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)
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tool = Location(tool_center, (rotation_x, 0.0, 0.0)) * Box(
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VIEWER_POCKET_WIDTH,
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VIEWER_POCKET_HEIGHT,
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tool_depth,
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)
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return body - tool
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def cut_viewer_circular_pocket(body):
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x_pos, y_pos, z_pos = CIRCULAR_POCKET_CENTER
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normal_x, normal_y, normal_z = CIRCULAR_POCKET_NORMAL
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normal_length = sqrt(normal_x**2 + normal_y**2 + normal_z**2)
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normal_y /= normal_length
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normal_z /= normal_length
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rotation_x = degrees(atan2(-normal_y, normal_z))
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tool_depth = CIRCULAR_POCKET_DEPTH + CIRCULAR_POCKET_OVERSHOOT
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tool_center_offset = (CIRCULAR_POCKET_DEPTH - CIRCULAR_POCKET_OVERSHOOT) / 2.0
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tool_center = (
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x_pos,
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y_pos + normal_y * tool_center_offset,
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z_pos + normal_z * tool_center_offset,
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)
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tool = Location(tool_center, (rotation_x, 0.0, 0.0)) * Cylinder(
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CIRCULAR_POCKET_DIAMETER / 2.0,
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tool_depth,
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)
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return body - tool
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def cut_viewer_counterbore(body):
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x_pos, y_pos, z_pos = COUNTERBORE_CENTER
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normal_x, normal_y, normal_z = COUNTERBORE_NORMAL
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normal_length = sqrt(normal_x**2 + normal_y**2 + normal_z**2)
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normal_y /= normal_length
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normal_z /= normal_length
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rotation_x = degrees(atan2(-normal_y, normal_z))
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through_depth = OUTER_DIAMETER + 4.0
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through_tool_depth = through_depth + COUNTERBORE_THROUGH_OVERSHOOT
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through_center_offset = (through_depth - COUNTERBORE_THROUGH_OVERSHOOT) / 2.0
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through_center = (
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x_pos,
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y_pos + normal_y * through_center_offset,
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z_pos + normal_z * through_center_offset,
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)
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through_tool = Location(through_center, (rotation_x, 0.0, 0.0)) * Cylinder(
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COUNTERBORE_HOLE_DIAMETER / 2.0,
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through_tool_depth,
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)
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counterbore_tool_depth = COUNTERBORE_DEPTH + COUNTERBORE_OVERSHOOT
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counterbore_center_offset = (COUNTERBORE_DEPTH - COUNTERBORE_OVERSHOOT) / 2.0
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counterbore_center = (
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x_pos,
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y_pos + normal_y * counterbore_center_offset,
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z_pos + normal_z * counterbore_center_offset,
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)
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counterbore_tool = Location(counterbore_center, (rotation_x, 0.0, 0.0)) * Cylinder(
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COUNTERBORE_DIAMETER / 2.0,
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counterbore_tool_depth,
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)
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return body - through_tool - counterbore_tool
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def gen_step():
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body, total = stepped_body([(OUTER_DIAMETER, LENGTH)])
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body = cut_end_bore(body, total, RECESS_DIAMETER, RECESS_DEPTH)
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result = export_horizontal(body, "pin_004910_like")
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result = cut_viewer_rectangular_pocket(result)
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result = cut_viewer_circular_pocket(result)
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result = cut_viewer_counterbore(result)
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result.label = "pin_004910_like"
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return result
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