120 lines
3.1 KiB
Python
120 lines
3.1 KiB
Python
from dataclasses import dataclass
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import math
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import cadquery as Cq
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from nhf import Item, Role
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import nhf.utils
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@dataclass(frozen=True)
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class FlatHeadBolt(Item):
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diam_head: float
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height_head: float
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diam_thread: float
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height_thread: float
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@property
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def name(self) -> str:
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return f"Bolt M{int(self.diam_thread)} h{int(self.height_thread)}mm"
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@property
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def role(self) -> Role:
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return Role.CONNECTION
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def generate(self) -> Cq.Assembly:
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head = Cq.Solid.makeCylinder(
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radius=self.diam_head / 2,
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height=self.height_head,
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)
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rod = (
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Cq.Workplane('XY')
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.cylinder(
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radius=self.diam_thread/ 2,
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height=self.height_thread,
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centered=(True, True, False))
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)
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rod.faces("<Z").tag("tip")
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rod.faces(">Z").tag("root")
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rod = rod.union(head.located(Cq.Location((0, 0, self.height_thread))))
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return rod
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@dataclass(frozen=True)
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class ThreaddedKnob(Item):
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"""
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A threaded rod with knob on one side
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"""
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diam_thread: float
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height_thread: float
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diam_knob: float
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diam_neck: float
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height_neck: float
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height_knob: float
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@property
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def name(self) -> str:
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return f"Knob M{int(self.diam_thread)} h{int(self.height_thread)}mm"
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def generate(self) -> Cq.Assembly:
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knob = Cq.Solid.makeCylinder(
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radius=self.diam_knob / 2,
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height=self.height_knob,
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)
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neck = Cq.Solid.makeCylinder(
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radius=self.diam_neck / 2,
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height=self.height_neck,
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)
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thread = (
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Cq.Workplane('XY')
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.cylinder(
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radius=self.diam_thread / 2,
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height=self.height_thread,
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centered=(True, True, False))
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)
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thread.faces("<Z").tag("tip")
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thread.faces(">Z").tag("root")
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return (
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Cq.Assembly()
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.addS(thread, name="thread", role=Role.CONNECTION)
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.addS(neck, name="neck", role=Role.HANDLE,
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loc=Cq.Location((0, 0, self.height_thread)))
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.addS(knob, name="knob", role=Role.HANDLE,
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loc=Cq.Location((0, 0, self.height_thread + self.height_neck)))
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)
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@dataclass(frozen=True)
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class HexNut(Item):
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diam_thread: float
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pitch: float
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thickness: float
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width: float
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def __post_init__(self):
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assert self.width > self.diam_thread
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@property
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def name(self):
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return f"HexNut M{int(self.diam_thread)}-{self.pitch}"
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@property
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def role(self) -> Role:
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return Role.CONNECTION
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def generate(self) -> Cq.Workplane:
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r = self.width / math.sqrt(3)
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result = (
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Cq.Workplane("XY")
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.sketch()
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.regularPolygon(r=r, n=6)
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.circle(r=self.diam_thread/2, mode='s')
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.finalize()
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.extrude(self.thickness)
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)
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result.faces("<Z").tag("bot")
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result.faces(">Z").tag("top")
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result.copyWorkplane(Cq.Workplane('XY')).tagPlane("dirX", direction="+X")
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return result
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