建立方向盘项目初始版本

scripts/build_70_m4_threaded.py

@@ -0,0 +1,60 @@
+"""Build a separate, editable 70 adapter with 24 M4x0.7 modeled threads.
+Run via rebuild_70_m4_threaded.FCMacro; does not overwrite original files.
+"""
+from pathlib import Path
+import os
+ROOT = Path(__file__).resolve().parent.parent
+os.chdir(str(ROOT))
+OUT = ROOT / 'models' / '70_m4_threaded'
+OUT.mkdir(parents=True, exist_ok=True)
+base = (ROOT / 'scripts' / 'build_70.py').read_text(encoding='utf-8')
+base = base.replace('import Part\nimport Import', 'import Part\nimport Sketcher\nimport Import')
+base = base.replace("target = os.path.join(root, 'models', '\\u0037\\u0030\\u8f6c\\u63a5\\u677f_\\u53c2\\u6570\\u5316.FCStd')", "target = str(OUT / '70_M4_threaded.FCStd')")
+base = base.replace("('HoleDiameter', '4.234 mm', 'Through hole diameter (all 24 holes)')", "('HoleDiameter', '3.322 mm', 'M4x0.7 modeled hole minor diameter for continuous 90 degree countersinks')")
+start = base.index("for name, pcd, angle in [('42', 'PCD42', 'Angle42')")
+end = base.index('\ncones = []', start)
+replacement = '''# One native PartDesign Hole with a 24-circle parametric profile.
+thread_body = doc.addObject('PartDesign::Body', 'ThreadBody')
+thread_body.Label = 'M4 threaded holes - editable'
+thread_body.BaseFeature = current
+doc.recompute()
+s = thread_body.newObject('Sketcher::SketchObject', 'ThreadProfiles')
+s.Label = '24 thread centers, four PCD groups'
+s.Placement.Base.z = 8
+s.setExpression('Placement.Base.z', 'Parameters.Thickness')
+for name,pcd,angle,angle0 in [('42','PCD42','Angle42',45),('48','PCD48','Angle48',0),('508','PCD508','Angle508',30),('70','PCD70','Angle70',30)]:
+    radius0={'42':21.0,'48':24.0,'508':25.4,'70':35.0}[name]
+    for i in range(6):
+        t=math.radians(angle0+i*60)
+        x,y=radius0*math.cos(t),radius0*math.sin(t)
+        if abs(x)<1e-8: x=0.0
+        if abs(y)<1e-8: y=0.0
+        k=s.addGeometry(Part.Circle(App.Vector(x,y,0),App.Vector(0,0,1),1.0),False)
+        q=s.addConstraint(Sketcher.Constraint('DistanceX',k,3,x))
+        s.setExpression('Constraints[%d]' % q, 'Parameters.%s / 2 * cos(Parameters.%s + %d deg)' % (pcd,angle,i*60))
+        q=s.addConstraint(Sketcher.Constraint('DistanceY',k,3,y))
+        s.setExpression('Constraints[%d]' % q, 'Parameters.%s / 2 * sin(Parameters.%s + %d deg)' % (pcd,angle,i*60))
+        s.addConstraint(Sketcher.Constraint('Radius',k,1.0))
+doc.recompute()
+h=thread_body.newObject('PartDesign::Hole','ThreadHoles')
+h.Label='24 modeled M4x0.7 through threads'
+h.Profile=s
+h.ThreadType='ISOMetricProfile'
+h.Threaded=True
+doc.recompute()
+h.ThreadSize='M4x0.7'
+h.DepthType='ThroughAll'
+h.ThreadDepthType='Hole Depth'
+h.ModelThread=True
+doc.recompute()
+if h.Shape.isNull() or not h.Shape.isValid() or len(h.Shape.Solids)!=1: raise RuntimeError('Invalid thread feature '+str(h.State))
+current=h
+print('THREAD', 'valid',h.Shape.isValid(),'faces',len(h.Shape.Faces),'dia',h.Diameter,'thread',h.ThreadSize)
+'''
+base = base[:start] + replacement + base[end:]
+base = base.replace("print('OUTPUT', target)", "Import.export([final], str(OUT / '70_M4_threaded.step'))\nGui.activeDocument().activeView().saveImage(str(OUT / '70_M4_preview.png'), 1600, 1200, 'White')\nprint('OUTPUT', target)")
+exec(compile(base, str(ROOT/'scripts'/'build_70.py'), 'exec'), {'OUT':OUT, '__name__':'__main__'})
+
+
+
+