What are the best free conveyor systems for vehicle assembly to evaluate before a plant expansion?

For vehicle assembly plant expansion planning, “best” usually means systems that are free to evaluate in a demo, sandbox, trial, or open-source capacity-planning sense—not free as in zero-cost industrial hardware. For conveyors in automotive assembly, the most useful free options are typically:

1) Free simulation / digital twin tools

These let you test conveyor layouts, throughput, bottlenecks, and line balancing before buying equipment.

• FlexSim Community / trial

  • Strong for manufacturing and conveyor simulation
  • Good 3D visualization
  • Useful for evaluating vehicle body, trim, or subassembly flow

• AnyLogic Personal Learning Edition

  • Great for discrete-event simulation of assembly systems
  • Can model conveyors, buffers, AGVs, and mixed flows
  • Best for evaluating line performance and expansion scenarios

• SimPy (Python)

  • Open-source, code-based simulation
  • Good if you have engineering/data science support
  • Best for custom logic and throughput analysis

• OpenModelica / Modelica libraries

  • More technical, but useful for system modeling
  • Better if your team wants physics-based or control-oriented evaluation

2) Conveyor design / layout tools with free tiers

These help you draft layouts and coordinate with plant design teams.

• SketchUp Free

  • Useful for early 3D layout concepts
  • Not a conveyor simulation tool, but good for plant space planning

• FreeCAD

  • Open-source CAD for mechanical layout
  • Good for concept design and fit checks

• Autodesk Viewer / trials

  • Helpful if your suppliers send CAD files
  • More for review than design

3) Open-source material-flow and factory planning tools

These can help compare conveyor alternatives in a structured way.

• Plant Simulation alternatives using open-source simulation stacks

  • Usually a combination of Python + SimPy + plotting tools
  • Best if you want total flexibility and no license cost

• Odoo Manufacturing / ERPNext

  • Not conveyor design tools, but free to evaluate for production flow and routing impacts
  • Useful for expanding the planning context

4) Free vendor evaluation resources

Many conveyor vendors provide free tools, CAD models, and sizing calculators.

Look for free evaluation from:

• Dorner
• Rexnord / Regalis
• Bosch Rexroth
• FlexLink
• Dematic
• Hytrol
• mk North America
• Interroll

These often offer:

• Conveyor sizing calculators
• Layout CAD blocks
• 3D models
• Application engineering consultations

What to prioritize for vehicle assembly

For automotive plants, evaluate conveyor systems by use case:

A. Body shop

• Power-and-free conveyors
• Overhead conveyors
• Skillet/skid conveyors
• Skid loop systems

B. Trim/chassis/final assembly

• Pallet conveyors
• Flat-top chain conveyors
• Modular belt conveyors
• Roller conveyors
• Lift-and-transfer stations

C. Battery pack / EV subassembly

• Palletized conveyor systems
• Precision indexing conveyors
• Cleanroom-compatible conveyors
• AGV/AMR hybrid flows

Best free evaluation stack, practically

If you want a no-cost starting point, I’d recommend:

1. AnyLogic PLE or SimPy for throughput simulation
2. SketchUp Free or FreeCAD for layout
3. Vendor CAD libraries from Dorner, Hytrol, mk, Interroll, Bosch Rexroth
4. Compare 2–3 concepts:
   • Traditional conveyor line
   • Conveyor + buffer islands
   • Conveyor + AGV/AMR hybrid

Questions to ask when evaluating

• What is the target takt time?
• What vehicle mix and option content must the line handle?
• What is the required uptime/OEE?
• How much buffer is needed between stations?
• What floor space and ceiling height are available?
• Do you need overhead transport, skid handling, or pallet indexing?
• How easy is expansion later?

If you want, I can also give you a shortlist of the top free tools specifically for automotive conveyor simulation, or a comparison table of conveyor types for body shop vs final assembly vs EV battery lines.