Concrete Mixer Locking Mechanism CAD Design
Budget: $250 – $750 USD
Slamtransportøren AS seeks a skilled CAD engineer to design a 3D model, assembly, and technical drawings for a locking mechanism to seal a rotating concrete mixer drum (Ø1100 mm opening). The system enables controlled opening/closing via a sliding lid driven by a trapezoidal threaded rod. Key components include:
Lid: Ø1100 mm, 12 mm thick S355 steel plate with a 3 mm deep, 10 mm wide groove (Ø1090 mm) for a rubber gasket and four Ø12 mm holes (149 mm x 149 mm square pattern).
Steel cross: Two 50x100x3 mm, 1200 mm long S355 steel profiles in a plus-sign (+), with a Ø90 mm central hole for an M50 nut.
Flat iron: Four 100x30x600 mm S355 steel bars, each with two countersunk Ø12 mm holes (40 mm and 80 mm from end) for bolting to brackets.
Brackets: Four 100x30x100 mm S355 steel brackets welded to the drum at 12, 3, 6, and 9 o’clock, each with two Ø12 mm holes to bolt to flat irons.
Other components: M50 trapezoidal threaded rod (800 mm), M50 nut, self-aligning ball bearing, eight M12x50 mm high-strength bolts, and a 10 mm wide, 3.42 m long rubber gasket.
The lid slides 600 mm on flat irons, driven by the threaded rod through the cross’s nut. Flat irons are bolted to brackets and welded to the cross during installation. The system rotates with the drum. Total mass: ~157.38 kg.
We need precise 3D models, a functional assembly, and manufacturing-ready drawings. The project requires proficiency in SolidWorks, Autodesk Inventor, or Fusion 360, with experience in mechanical assemblies and GD&T.
Deliverables:
3D part models for all components (9 unique parts: lid, cross, flat iron, bracket, threaded rod, nut, bearing, bolt, gasket).
Assembly model showing 600 mm lid travel and threaded rod motion.
Technical drawings for each part and assembly, including dimensions, tolerances (±0.1 mm for holes/grooves, ±1 mm for cuts), and bill of materials (BOM).
Files in native CAD format (e.g., .sldprt, .sldasm), STEP/IGES, and PDF (drawings).
Mass property report verifying ~157.38 kg total mass.
Detailed CAD Instructions:
Units: Millimeters (mm). Software: SolidWorks (preferred), Autodesk Inventor, or Fusion 360. Material: S355 steel (density 7850 kg/m³) for lid, cross, flat iron, bracket, threaded rod; high-strength steel for nut/bolts; steel for bearing; rubber (1200 kg/m³) for gasket.
Part: Lid
File: “Lid.sldprt”.
Sketch on Top Plane: Ø1100 mm circle. Extrude 12 mm.
Groove: On bottom face, sketch Ø1090 mm circle (centerline). Cut 10 mm wide (Ø1085–1095 mm), 3 mm deep groove (Cut-Extrude or Revolve Cut).
Holes: On top face, sketch four Ø12 mm circles at (±74.5, ±74.5) mm (149 mm x 149 mm square). Cut-Extrude through all.
Material: S355 steel. Mass: ~79.55 kg.
Part: Steel Cross
File: “Steel_Cross.sldprt”.
Sketch on Front Plane: 50 mm x 100 mm rectangle. Extrude 1200 mm (±600 mm).
Sketch on Right Plane: 50 mm x 100 mm rectangle, intersecting at origin. Extrude 1200 mm (±600 mm).
Hole: On Top Plane, sketch Ø90 mm circle. Cut-Extrude through both profiles.
Material: S355 steel. Mass: ~11.30 kg.
Part: Flat Iron
File: “Flat_Iron.sldprt”.
Sketch on Top Plane: 100 mm x 600 mm rectangle. Extrude 30 mm.
Holes: On top face, sketch two Ø12 mm circles at x=40 mm, x=80 mm (y=50 mm, centerline). Use Hole Wizard for M12 countersunk holes (ISO, flush).
Material: S355 steel. Mass: ~14.13 kg.
Part: Bracket
File: “Bracket.sldprt”.
Sketch on Top Plane: 100 mm x 100 mm rectangle. Extrude 30 mm.
Holes: On top face, sketch two Ø12 mm circles at x=40 mm, x=80 mm (y=50 mm, centerline). Cut-Extrude through all (matching flat iron holes).
Material: S355 steel. Mass: ~2.36 kg.
Part: Trapezoidal Threaded Rod
File: “Threaded_Rod.sldprt”.
Sketch on Top Plane: Ø50 mm circle. Extrude 800 mm. Add Tr 50x8 thread (Thread feature or Revolve Cut).
Material: S355 steel. Mass: ~12.00 kg.
Part: M50 Nut
File: “M50_Nut.sldprt”.
Sketch on Top Plane: Hexagon (~75 mm across flats). Extrude 30 mm. Cut Tr 50x8 threaded hole.
Material: High-strength steel. Mass: ~0.50 kg.
Part: Bearing (M50)
File: “Bearing_M50.sldprt”.
Sketch on Top Plane: Ø100 mm circle. Extrude 30 mm. Cut Ø50 mm hole. Add 5 mm fillets.
Material: Steel. Mass: ~2.00 kg.
Part: Bolt (M12x50 mm)
File: “Bolt_M12x50.sldprt”.
Sketch on Top Plane: Ø12 mm circle. Extrude 50 mm. Add Ø20 mm hex head (8 mm). Apply M12 ISO thread (cosmetic).
Material: High-strength steel. Mass: ~0.10 kg.
Part: Rubber Gasket
File: “Rubber_Gasket.sldprt”.
Sketch on Top Plane: 10 mm x 3 mm rectangle. Revolve around Ø1090 mm axis (~3424 mm length).
Material: Rubber (1200 kg/m³). Mass: ~0.50 kg.
Assembly: Locking Mechanism
File: “Locking_Mechanism.sldasm”.
Insert: Lid, Steel_Cross, Flat_Iron (x4), Bracket (x4), Threaded_Rod, M50_Nut, Bearing_M50, Bolt_M12x50 (x8), Rubber_Gasket.
Brackets: Place at 12, 3, 6, 9 o’clock around Ø1100 mm circle (simulating drum weld points). Mate bottom faces to a plane 42 mm below lid’s bottom (30 mm bracket + 12 mm lid thickness). Align radially.
Flat Irons: Mate top face of each flat iron to bottom face of corresponding bracket. Concentric mate: Align flat iron’s Ø12 mm holes to bracket’s Ø12 mm holes.
Lid: Mate bottom to flat iron tops (sliding). Center concentrically with brackets (Ø1100 mm).
Steel Cross: Mate bottom to flat iron tops. Align arms with flat irons.
Threaded Rod: Concentric to cross’s Ø90 mm hole. End 100 mm above cross.
M50 Nut: Concentric to threaded rod, bottom coincident with cross top.
Bearing: Concentric to threaded rod end, 50 mm from end.
Bolts: Concentric to flat iron and bracket holes (four bolts per flat iron, two per side), heads flush with flat iron top.
Rubber Gasket: Mate to lid’s groove.
Motion: Add linear mate (lid, 600 mm travel along flat iron axis) and screw mate (threaded rod, 8 mm pitch). Verify no interferences.
Drawings:
Part drawings (“Lid_Drawing.slddrw”, etc.): Front, Top, Side, Section views. Dimensions: Lid (Ø1100 mm, groove Ø1090 mm, holes 149 mm x 149 mm), Cross (50x100x3 mm, Ø90 mm hole), Flat Iron (100x30x600 mm, holes 40 mm and 80 mm from end), Bracket (100x30x100 mm, holes 40 mm and 80 mm). Tolerances: ±0.1 mm for holes/grooves, ±1 mm for cuts. Material: S355 steel, rubber. Note: “No galvanizing. Contact client.”
Assembly drawing: Exploded view, section view (threaded rod/nut). Include BOM. Note: “Brackets welded to drum. Flat irons bolted to brackets and welded to cross during installation.”
Export: Native CAD files, STEP/IGES, PDF drawings.
Mass Verification:
Assign materials. Verify total mass: ~157.38 kg (Lid: 79.55 kg, Flat Iron: 4x14.13 kg, Cross: 11.30 kg, Bracket: 4x2.36 kg, Threaded Rod: 12.00 kg, Nut: 0.50 kg, Bearing: 2.00 kg, Bolts: 8x0.10 kg, Gasket: 0.50 kg).
Dimensions are estimated and might be subjected to changes
Lid: Ø1100 mm, 12 mm thick S355 steel plate with a 3 mm deep, 10 mm wide groove (Ø1090 mm) for a rubber gasket and four Ø12 mm holes (149 mm x 149 mm square pattern).
Steel cross: Two 50x100x3 mm, 1200 mm long S355 steel profiles in a plus-sign (+), with a Ø90 mm central hole for an M50 nut.
Flat iron: Four 100x30x600 mm S355 steel bars, each with two countersunk Ø12 mm holes (40 mm and 80 mm from end) for bolting to brackets.
Brackets: Four 100x30x100 mm S355 steel brackets welded to the drum at 12, 3, 6, and 9 o’clock, each with two Ø12 mm holes to bolt to flat irons.
Other components: M50 trapezoidal threaded rod (800 mm), M50 nut, self-aligning ball bearing, eight M12x50 mm high-strength bolts, and a 10 mm wide, 3.42 m long rubber gasket.
The lid slides 600 mm on flat irons, driven by the threaded rod through the cross’s nut. Flat irons are bolted to brackets and welded to the cross during installation. The system rotates with the drum. Total mass: ~157.38 kg.
We need precise 3D models, a functional assembly, and manufacturing-ready drawings. The project requires proficiency in SolidWorks, Autodesk Inventor, or Fusion 360, with experience in mechanical assemblies and GD&T.
Deliverables:
3D part models for all components (9 unique parts: lid, cross, flat iron, bracket, threaded rod, nut, bearing, bolt, gasket).
Assembly model showing 600 mm lid travel and threaded rod motion.
Technical drawings for each part and assembly, including dimensions, tolerances (±0.1 mm for holes/grooves, ±1 mm for cuts), and bill of materials (BOM).
Files in native CAD format (e.g., .sldprt, .sldasm), STEP/IGES, and PDF (drawings).
Mass property report verifying ~157.38 kg total mass.
Detailed CAD Instructions:
Units: Millimeters (mm). Software: SolidWorks (preferred), Autodesk Inventor, or Fusion 360. Material: S355 steel (density 7850 kg/m³) for lid, cross, flat iron, bracket, threaded rod; high-strength steel for nut/bolts; steel for bearing; rubber (1200 kg/m³) for gasket.
Part: Lid
File: “Lid.sldprt”.
Sketch on Top Plane: Ø1100 mm circle. Extrude 12 mm.
Groove: On bottom face, sketch Ø1090 mm circle (centerline). Cut 10 mm wide (Ø1085–1095 mm), 3 mm deep groove (Cut-Extrude or Revolve Cut).
Holes: On top face, sketch four Ø12 mm circles at (±74.5, ±74.5) mm (149 mm x 149 mm square). Cut-Extrude through all.
Material: S355 steel. Mass: ~79.55 kg.
Part: Steel Cross
File: “Steel_Cross.sldprt”.
Sketch on Front Plane: 50 mm x 100 mm rectangle. Extrude 1200 mm (±600 mm).
Sketch on Right Plane: 50 mm x 100 mm rectangle, intersecting at origin. Extrude 1200 mm (±600 mm).
Hole: On Top Plane, sketch Ø90 mm circle. Cut-Extrude through both profiles.
Material: S355 steel. Mass: ~11.30 kg.
Part: Flat Iron
File: “Flat_Iron.sldprt”.
Sketch on Top Plane: 100 mm x 600 mm rectangle. Extrude 30 mm.
Holes: On top face, sketch two Ø12 mm circles at x=40 mm, x=80 mm (y=50 mm, centerline). Use Hole Wizard for M12 countersunk holes (ISO, flush).
Material: S355 steel. Mass: ~14.13 kg.
Part: Bracket
File: “Bracket.sldprt”.
Sketch on Top Plane: 100 mm x 100 mm rectangle. Extrude 30 mm.
Holes: On top face, sketch two Ø12 mm circles at x=40 mm, x=80 mm (y=50 mm, centerline). Cut-Extrude through all (matching flat iron holes).
Material: S355 steel. Mass: ~2.36 kg.
Part: Trapezoidal Threaded Rod
File: “Threaded_Rod.sldprt”.
Sketch on Top Plane: Ø50 mm circle. Extrude 800 mm. Add Tr 50x8 thread (Thread feature or Revolve Cut).
Material: S355 steel. Mass: ~12.00 kg.
Part: M50 Nut
File: “M50_Nut.sldprt”.
Sketch on Top Plane: Hexagon (~75 mm across flats). Extrude 30 mm. Cut Tr 50x8 threaded hole.
Material: High-strength steel. Mass: ~0.50 kg.
Part: Bearing (M50)
File: “Bearing_M50.sldprt”.
Sketch on Top Plane: Ø100 mm circle. Extrude 30 mm. Cut Ø50 mm hole. Add 5 mm fillets.
Material: Steel. Mass: ~2.00 kg.
Part: Bolt (M12x50 mm)
File: “Bolt_M12x50.sldprt”.
Sketch on Top Plane: Ø12 mm circle. Extrude 50 mm. Add Ø20 mm hex head (8 mm). Apply M12 ISO thread (cosmetic).
Material: High-strength steel. Mass: ~0.10 kg.
Part: Rubber Gasket
File: “Rubber_Gasket.sldprt”.
Sketch on Top Plane: 10 mm x 3 mm rectangle. Revolve around Ø1090 mm axis (~3424 mm length).
Material: Rubber (1200 kg/m³). Mass: ~0.50 kg.
Assembly: Locking Mechanism
File: “Locking_Mechanism.sldasm”.
Insert: Lid, Steel_Cross, Flat_Iron (x4), Bracket (x4), Threaded_Rod, M50_Nut, Bearing_M50, Bolt_M12x50 (x8), Rubber_Gasket.
Brackets: Place at 12, 3, 6, 9 o’clock around Ø1100 mm circle (simulating drum weld points). Mate bottom faces to a plane 42 mm below lid’s bottom (30 mm bracket + 12 mm lid thickness). Align radially.
Flat Irons: Mate top face of each flat iron to bottom face of corresponding bracket. Concentric mate: Align flat iron’s Ø12 mm holes to bracket’s Ø12 mm holes.
Lid: Mate bottom to flat iron tops (sliding). Center concentrically with brackets (Ø1100 mm).
Steel Cross: Mate bottom to flat iron tops. Align arms with flat irons.
Threaded Rod: Concentric to cross’s Ø90 mm hole. End 100 mm above cross.
M50 Nut: Concentric to threaded rod, bottom coincident with cross top.
Bearing: Concentric to threaded rod end, 50 mm from end.
Bolts: Concentric to flat iron and bracket holes (four bolts per flat iron, two per side), heads flush with flat iron top.
Rubber Gasket: Mate to lid’s groove.
Motion: Add linear mate (lid, 600 mm travel along flat iron axis) and screw mate (threaded rod, 8 mm pitch). Verify no interferences.
Drawings:
Part drawings (“Lid_Drawing.slddrw”, etc.): Front, Top, Side, Section views. Dimensions: Lid (Ø1100 mm, groove Ø1090 mm, holes 149 mm x 149 mm), Cross (50x100x3 mm, Ø90 mm hole), Flat Iron (100x30x600 mm, holes 40 mm and 80 mm from end), Bracket (100x30x100 mm, holes 40 mm and 80 mm). Tolerances: ±0.1 mm for holes/grooves, ±1 mm for cuts. Material: S355 steel, rubber. Note: “No galvanizing. Contact client.”
Assembly drawing: Exploded view, section view (threaded rod/nut). Include BOM. Note: “Brackets welded to drum. Flat irons bolted to brackets and welded to cross during installation.”
Export: Native CAD files, STEP/IGES, PDF drawings.
Mass Verification:
Assign materials. Verify total mass: ~157.38 kg (Lid: 79.55 kg, Flat Iron: 4x14.13 kg, Cross: 11.30 kg, Bracket: 4x2.36 kg, Threaded Rod: 12.00 kg, Nut: 0.50 kg, Bearing: 2.00 kg, Bolts: 8x0.10 kg, Gasket: 0.50 kg).
Dimensions are estimated and might be subjected to changes