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Process Design and Simulation |
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The process design and simulation deliverables span the entire spectrum of discrete assembly from concept to installation and start up assistance, including tool content, assembly sequence, welding parameters, ergonomics, robotics, throughput, containerization, in-plant conveyance, etc. Investigations and documentation are required to identify the ideal manufacturing processes and system requirement. The process deliverables work as living documents and are maintained and updated to the latest engineering changes, including modifications or re-sequencing of the processes caused by additional parts, bottlenecks, etc. These include:
- Bench mark expertise
- Formalize goals, objectives & cost justification models
- Process station design & cycle time analysis
- Station layout & optimization
- Develop system layouts
- GD&T expertise (Assembly locating strategy)
- Ergonomic considerations (Motion studies & walk distance)
- Packaging & material route planning
- Discrete event simulation justification & prove out of all alternatives
- Prototype process
- Process documentation (Manufacturing assembly descriptions)
- Databank final deliverables
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- Manufacturing Feasibility Studies
| The first step in process design is manufacturing feasibility studies which begins with the clay model at an early design. It includes preliminary production assembly process, balance line operations, preliminary weld studies, weld gun and power tool access, sealing studies and applications, fluid fills, ergonomic considerations, development alternative processes, track tool issues, manufacturing program timing, investment analysis, identification of manufacturing objectives and support requirements and facilities impact studies. |
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- Simultaneous Engineering
This step includes development of tool concepts and process requirements for all systems which include the following:
- Under-body
- Roof & body framing
- Body-sides & aperture assemblies
- Closures:hood, deck lid, doors, etc.
- Trim,chassis & final line operations
- Off Line Operations
- Glass seal & installation
- Suspension S/A
- Engine and transmission S/A
- Specialized equipment
- Electric test
- Ergonomic assist devices
- Transfer systems
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- Bid Package Creation
The detailed analysis of engineering requirements, vis-à-vis the ergonomic and economical feasibility, is followed by a detailed document which addresses the peculiarities and optimizes the resources, while taking the compliance requirements of safety standards into consideration. This includes:
- Preliminary process sheets
- Process flow charts by area
- Work station layouts
- Welding, sealing and adhesive equipment
- Safety welds and torque specifications
- Part numbers in each station
- Process sequence scroll
- Datum Coordination Drawing (D.C.D.)
- Method estimates (system cost)
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- Computer Graphic Simulation
There are several methods and tools by which a process plan can be simulated with an objective of optimizing the output while balancing the resources.
- Complete mechanical system simulation by area
- Robotic simulation & off-line programming (DELMIA)
- Reverse the process and upload factory floor robot programs for accurate positioning and change applications
- Cycle timing and discrete event throughout (QUEST, AutoMod)
- Manual operation ergonomic simulation (IGRIP ERGO)
- Complete Plant and Supply Chain simulation (FactoryFlow, Virtual)
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