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| Profile | ||||||||||||||||||||||||||||
| Customer: | Draexlmaier
(DVS) GmbH, Boeblingen Germany |
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Nuyts AGVs (FTS) with Lift
Table for Material Distribution between Kitting Area and Assembly Lines for Draexlmaier (DVS) GmbH, Boeblingen Germany. |
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A
manufacturer of Cable Harnesses for the Automobile Industry. |
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Profile
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| Customer: | Copeland | |||||||||||||||||||||||||||
| Location: | Thatcham, U.K. | |||||||||||||||||||||||||||
| Number of Vehicles: | 18 | |||||||||||||||||||||||||||
| Specifications: |
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Load capacity ca 350kg
-- Overall Vehicle dimensions: 1800 x 1000 x 700mm -- Maximum speed: 1 m/s -- Motor-in-wheel drive: 24 V Battery: 24 V 80 Ah -- Onboard battery-charger -- Passive-inductive guidance system -- Rotating Conveyor Platform -- Magnetic Floor Code Controlled. -- Alternative: Optical guidance system |
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| The Project: |
The
Automated Guided Vehicles (AGVs), Fahrerlose Transport Systeme (FTS), was developed for Copeland from the Nuyts
motormouse® - Intelligent Assembly System (IAS), intelligente Montagesysteme (IMS), to build Condensing
Units used in Refrigeration and Air Conditioning. These AGVs (FTS) would allow
improved accessibility during assembly and increase flexibility between
stations to create a ‘pull’ production environment.
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| The Task: |
Copeland
required AGVs (FTS) which would be used for production build within a ‘flow’
environment. The AGVs (FTS) would require minimum maintenance and be designed
to be very simple to use. Also with the use of pallets on all Condensing
Units, a method of collecting the sawdust safely without damage to the
AGVs (FTS) had to be created.
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| The Goal: |
The
AGV (FTS) system was designed primarily to eliminate barriers, such as conveyor
systems. This would increase flexibility, enforce ‘one-piece’ flow and
minimize WIP. The AGV (FTS) system would incorporate a rotating platform, which
would be used to improve access during assembly.
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| The Solution: |
A
simple, low cost solution using proven technology, a flexible guidance
system and a vehicle built from off-the-shelf, readily available parts
that guarantee simple servicing and a low Life Cycle Costs. The Nuyts
AGV (FTS) have been carefully designed with simple controls and a lot of emphasis
has been placed on ergonomics and operator interaction.
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| The Load Transfer: |
At
the end of the production line, a simple method of transfer was required
to move the Condensing Unit from the AGV (FTS) onto a conveyor system.
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| The Layout: |
The
loop is approximately 150m long and is designed so that both AGV (FTS) and forklift
traffic is controlled. The AGV (FTS) PLC software is written so that new machines can be serviced by the AGV (FTS) by simply placing new stop codes by the machine. |
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| The Guidance System: |
The
AGVs (FTS) use the Nuyts unique 50mm wide passive-inductive guidance system
in warehouse areas with extremely heavy forklift and pallet moving traffic.
The AGV (FTS) is equipped with a 4-bit coding system and supports up to 15 floor code initiated processes. An additional 8 bit transmitter is fitted to the vehicles so that load transfers can be quickly and reliably negotiated. |
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| The Process: |
A
Nuyts AGV (FTS) moves onto the first station when the previous AGV (FTS) moves onto
the next station. The Condensing Unit is assembled at each station. Where
there are variations in work content time parallel stations are used to
maintain the ‘Takt’ time.
As the AGV (FTS) moves along the assembly line it stops automatically at each station, missing stations if requested. At parallel stations the operator can send the AGV (FTS) along the parallel station line or back onto the main line. At parallel stations the Condensing Unit is rotated on the AGV (FTS) to allow the operator to carry out the work content. The vehicles are restarted by assembly operators using a foot switch. Upon reaching the end of the assembly process, the roller conveyor on the AGV (FTS) are unlocked allowing the operator to unload the Condensing Unit. After unloading the AGV (FTS) can be sent onto the maintenance track or continue on the return track. The AGV (FTS) stops at the traffic control sensors (AA). This vehicle will move onto sensor BB when the vehicle at sensor BB has moved onto sensor CC and the vehicle at sensor CC has moved onto the first station. This automatic chain of movements is started when the operator at the first station completes his work contents and moves the vehicle onto the next station. A simple traffic light system is used to control forklift traffic. |
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