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Assembly

Live part instances, persistent constraints, clash and BOM

Place parts as live instances inside nestable groups — edit the part and every instance follows. Position them by manipulation, snapping or persistent constraints, replicate them, and check the product with exact clash analysis and a bill of material.

Works on
Assemblies
Toolboxes
4
The V12 engine in the Assembly workbench with the full application window: the spec tree grouped into Cylinder Block & Sump, Cylinder Heads, Crank Train, Pistons & Connecting Rods and Valvetrain, and the assembly toolboxes on the right.
V12 engineThe Assembly workbench with its tree

Why it matters

What stands out

Instances stay live

An instance is a live reference to its source part: editing the part, in its own window or on disk, flows into the assembly. Edit In Place opens the part with the product drawn around it as context.

Constraints that re-solve

Coincidence, contact, offset, angle, fix and fix-together are persistent mates whose values are real parameters, re-solved live, on change or on demand, with broken and over-constrained mates reported.

Least-movement snapping

Snap and Multisnap move a part onto its target with a minimal-disturbance solve, so it moves the least amount needed.

Exact clash on demand

Clash runs an exact B-rep interference and clearance analysis on request and highlights both parts of each result row.

The 3.0 L inline-six assembly from the intake side: a cast-style block whose bolt columns run down the skirt as ribs between cored crankcase bays, port flanges in recessed panels on the head, a finned sump, a timing cover and a grooved damper.
3.0 L inline-sixA cast engine block, not a box
A complete V12 engine assembly in the ray-traced viewport: translucent block and heads reveal crankshaft, pistons, twin camshafts, valve springs and the timing belt driving both cam pulleys and the fan.
V12 engineV12 engine assembly
A tall wine cabinet with thirty pull-out drawers and its frame, brought in from a STEP file, shown in the Part Design viewport.
Wine cabinetWine cabinet (imported STEP)

Operations

Everything in Assembly

The complete inventory, toolbox by toolbox, with the icons exactly as they appear in the application.

Assembly8

  • Import PartPlace a part or sub-assembly from disk as an instance
  • Import Open FilePlace an already-open document as an instance
  • Insert GroupNew nestable assembly group
  • ManipulateDrag an instance or group with the translate/rotate manipulator
  • SnapMove a part onto a target with the least movement
  • MultisnapAccumulate several feature-to-target mates on one part
  • PlacementEdit an instance's six transform parameters
  • Edit In PlaceEdit a part in context; every instance follows the edit

Constraints8

  • Coincidence
  • Contact
  • OffsetValue entered or measured from the current placement
  • AngleAngle with sector choice, or measured
  • Fix
  • Fix Together
  • Quick ConstraintCreates the first applicable of contact, coincidence, offset, angle, parallel
  • UpdateRe-solve and report broken, unresolved or over-constrained mates

Product6

  • Multi InstantiationRepeat an instance by direction, spacing and count
  • Fast Multi InstantiationRepeat the last multi-instantiation definition
  • Reuse PatternPlace instances on a pattern defined in the source part
  • SymmetryMirror an instance about a plane
  • ClashExact B-rep interference and clearance analysis, on demand
  • Bill of MaterialQuantity per source part

Positioning1

  • Movement LockConfine manual moves to the freedoms constraints and joints leave

In use

Built with Assembly

The cutaway 8-speed planetary automatic transmission rendered photoreal in the Rendering workbench: a bead-blasted aluminium case with bright machined cut faces opens onto ground-steel helical planet gears, bronze thrust washers and copper-coloured clutch packs, on a glossy dark floor under soft studio light.

Transmission

8-speed planetary automatic

A cutaway 8-speed automatic transmission with four helical planetary sets and five shift elements, every tooth an exact involute. It reproduces all nine published gear ratios and runs a 3rd-to-4th shift as a mechanism.

Part documents
34
Mechanisms
10
Joints
649
Ratios reproduced to
6.5e-14

Part DesignSurface DesignAssemblyKinematicsRendering

Details
A complete V12 engine assembly in the ray-traced viewport: translucent block and heads reveal crankshaft, pistons, twin camshafts, valve springs and the timing belt driving both cam pulleys and the fan.

Engine

60° V12 engine

A complete 60° V12 with crank train, four camshafts, 48 valves and its accessories. One crank angle poses the whole engine.

Parts
33
Instances
181
Joints
113
Loop closure
2.8e-14 mm

Part DesignAssemblyKinematics

Details
A double-wishbone air-sprung front axle in the Kinematics workbench, posed by its driver, with every joint drawn as a glyph and the tree listing carrier, anti-roll bar, driveshafts and both wheel ends.

Chassis

Double-wishbone front suspension

A complete double-wishbone front axle with steering and driveline, measured over its whole travel and steering range — then rebuilt with bushing stiffnesses and tyre loads for a full kinematics-and-compliance study.

Part documents
30
Instances
47
Mobility
5
Camber gain
−0.016°/mm

Part DesignAssemblyKinematics

Details