Mobile Transport Units for Flexible Manufacturing Flow
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Solution Overview
Problem
Conventional conveyor systems in manufacturing environments lead to inefficiencies due to rigid structures causing wait times and bottlenecks, as workpieces must be delivered in a specific order, resulting in underutilization of work cells and delays.
Innovation Solution
A system utilizing mobile transport units (MTUs) that deliver transportable containers to and from work cells independently, controlled by a computer system managing status information and traffic rules, allowing for dynamic process flow adjustments and flexible routing based on production schedules and workpiece requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conveyor systems are used to deliver workpieces between work cells, then workpieces can be transported in a specific order, but wait times and bottlenecks occur resulting in underutilization of work cells
Solution Approach 1:
The patent replaces rigid conveyor systems with dynamic mobile transport units (MTUs) that can autonomously navigate to work cells. The MTUs dynamically adjust their routes and delivery timing based on real-time work cell status, eliminating fixed scheduling constraints and reducing wait times while improving work cell utilization.
Solution Approach 2:
Each work cell monitors its own status and autonomously requests workpieces when ready. The MTUs respond to these self-generated requests, eliminating the need for centralized conveyor scheduling and allowing work cells to operate at their own pace, thereby reducing idle time and improving utilization.
2Productivity
If conveyor systems are used to deliver workpieces, then workpieces can be transported between work cells, but bottlenecks are created due to variations in cycle times
Solution Approach 1:
The system replaces fixed conveyor paths with dynamic MTUs that can adapt their routes in real-time. When bottlenecks are detected at certain work cells, the computer system redistributes workpieces across alternative MTUs and routes, balancing the load and maintaining manufacturing efficiency without requiring complex mechanical adjustments to the transport infrastructure.
Solution Approach 2:
The patent changes the operational parameters of the transport system from fixed conveyor speed and routing to variable MTU navigation. The computer system continuously adjusts MTU routes, speeds, and delivery schedules based on real-time work cell cycle times, eliminating bottlenecks while maintaining system simplicity through software-based control rather than mechanical complexity.
3Adaptability or versatility
If rigid conveyor structures are used, then workpieces can be accurately located in work cells, but the system lacks flexibility for real-time adjustments
Solution Approach 1:
The patent introduces a computer system as an intermediary between the MTUs and work cells. This intermediary maintains precise tracking of MTU positions and work cell locations, ensuring accurate workpiece delivery and localization. The computer system processes real-time data to coordinate MTU movements, preserving localization accuracy while enabling flexible process flow adjustments through software control.
Solution Approach 2:
The patent replaces the mechanical rigidity of conveyor systems with software-based control of MTUs. The computer system uses digital mapping and coordinate tracking to maintain precise workpiece localization, substituting mechanical precision with computational accuracy. This allows real-time adjustments to process flows while maintaining the same level of localization precision through software calculations rather than mechanical constraints.
Data Source
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AI summary
A manufacturing system has one or more work cells that each performs one or more manufacturing processes. The system also has one or more mobile transport units ("MTUs") that deliver transportable containers containing workpieces to and from said work cells. The MTUs deliver the containers to the work cells in a manner such that the workpieces are localized in the work cells. The manufacturing system also has a computer system that has status information for each of the one or more MTUs and uses the status information to control each of the one or more MTUs to deliver the transportable containers to and from the one or more work cells.