Independent Assembly Vehicles for Flexible Workstation Routing
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Solution Overview
Problem
Conventional conveyor systems for motor vehicles and workpieces in manufacturing plants are inflexible, requiring all vehicles to follow a linear production line, leading to inefficiencies due to varying processing needs of individualized vehicles and workpieces, and lack the ability to adapt to changing production requirements.
Innovation Solution
A conveyor system with independently driven vehicles equipped with omnidirectional drives and navigation systems, allowing them to travel different sequences of processing stations based on the workpiece's requirements, and featuring detection devices to ensure worker safety and correct part installation, enabling flexible and adaptive production line configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all vehicles follow a linear production line, then the production line structure is simple, but the system lacks flexibility to adapt to varying processing needs of individualized workpieces
Solution Approach 1:
The production line is segmented into multiple processing stations that are spatially distributed rather than linearly arranged. Vehicles can be divided into workpiece carrier units and platform units that can be uncoupled and reconfigured. This segmentation allows different vehicle combinations to access different sequences of processing stations, providing flexibility without requiring a completely complex new system structure.
Solution Approach 2:
The system transitions from a static linear production line to a dynamic configuration where vehicles can independently navigate to different processing stations based on workpiece requirements. The omnidirectional drives and navigation systems enable vehicles to dynamically adjust their paths and destinations, allowing the production line to adapt flexibly to varying processing needs while maintaining a relatively simple overall layout.
2Adaptability or versatility
If vehicles are equipped with independent drives and navigation systems, then the system flexibility is improved, but the vehicle complexity and cost increase
Solution Approach 1:
Vehicles are segmented into functional modules: workpiece carrier units with omnidirectional drives and navigation systems, and platform units that can be coupled or uncoupled. This modular approach allows the complex navigation and drive functions to be concentrated in specific units rather than distributed across all vehicles, reducing overall system complexity while maintaining flexibility.
Solution Approach 2:
The omnidirectional drive system and navigation equipment serve multiple functions: they enable vehicles to travel to different processing stations, navigate complex paths, position precisely at stations, and coordinate with other vehicles. This multi-functionality reduces the need for separate specialized mechanisms, thereby reducing vehicle complexity while achieving high system flexibility.
3Productivity
If vehicles travel to different sequences of processing stations, then production efficiency is improved, but the control system complexity increases
Solution Approach 1:
Vehicles are equipped with navigation systems and onboard computers that enable them to autonomously determine their destinations, plan their paths, and navigate to the correct processing stations based on workpiece requirements. This self-service capability reduces the burden on the central control system, allowing production efficiency to improve without proportionally increasing control system complexity.
Solution Approach 2:
The system implements feedback mechanisms where vehicles report their status, position, and workpiece information to the control system, which then adjusts routing and coordination in real-time. This feedback loop enables efficient dynamic scheduling and conflict resolution, improving productivity while keeping the control system manageable through decentralized intelligence.
4Adaptability or versatility
If processing stations are distributed rather than arranged one behind another, then vehicle routing flexibility is improved, but the detection and navigation difficulty increases
Solution Approach 1:
The system replaces traditional mechanical positioning and detection methods with electronic navigation systems including GPS, RFID tags at processing stations, and onboard sensors. This substitution enables vehicles to accurately locate and navigate to distributed processing stations without complex mechanical guidance infrastructure, achieving routing flexibility while keeping detection and navigation manageable through electronic means.
Data Source
AI summary
A conveying system for simultaneously transporting workpieces and workers having a plurality of vehicles, which each have a workpiece receptacle, an assembly platform for workers to move around on, and a separate drive, with which each vehicle can be driven independently of other vehicles of the conveying system. Furthermore, the conveying system includes a plurality of workstations, which are set up for carrying out different work steps. A control device is configured to control the vehicles such that they can pass individually through a different succession of workstations depending on the transported workpiece.