Assembly Workstation Optical Guidance for Error Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In small series assembly, the high error rate and increased production costs due to lengthy training phases and manual switching between assembly steps hinder efficient and reproducible assembly processes, especially when assembling small parts without tools or using non-programmable tools.
Innovation Solution
An assembly workstation equipped with a marking device having different marking functions and a removal detector above each small parts box and tool, allowing automatic switching to the next assembly step, preventing incorrect removals, and enabling workers to focus on multiple assembly steps without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual switching between assembly steps is used, then workers can handle multiple assembly steps, but training times increase and error rates increase
Solution Approach 1:
The system provides real-time feedback through optical displays above each small parts box indicating which box should be removed next. The display changes based on current assembly step, providing continuous guidance to the worker and eliminating the need for training on sequence memorization while preventing errors from incorrect removals.
Solution Approach 2:
An intermediary control system acts between the worker and the small parts boxes. The system includes a controller that receives removal signals and sends display signals to optical indicators, serving as a mediator that guides the worker through the assembly sequence without requiring direct worker knowledge of the complex sequence.
2Adaptability or versatility
If manual switching between assembly steps is used, then workers can handle multiple assembly steps, but production costs increase due to faulty devices
Solution Approach 1:
The optical display system provides immediate feedback to the worker about which small parts box should be removed. The display only indicates the correct box, and the system can detect and alert incorrect removal attempts, thereby preventing assembly errors and improving product reliability.
Solution Approach 2:
The system serves itself by automatically tracking the assembly progress and providing guidance without human intervention. The controller automatically updates the display based on removal signals, and the system self-corrects by preventing progression until correct components are assembled, reducing reliance on worker expertise.
3Loss of time
If display systems are used to guide assembly steps, then training times are reduced, but device complexity increases
Solution Approach 1:
The display system is segmented into multiple independent optical indicators, each positioned above a specific small parts box. This segmentation allows the complex guidance information to be broken down into simple, localized visual signals that are easy to understand and reduce overall system complexity.
Solution Approach 2:
The system uses simple, inexpensive optical display elements (such as LEDs or simple lamps) rather than complex display technologies. These simple indicators are replaced or reset easily, and the overall system achieves complex guidance functionality through combinations of simple, low-cost components.
4Productivity
If automatic switching is implemented, then assembly speed increases, but measurement precision requirements increase for detecting removals
Solution Approach 1:
Sensor intermediaries are introduced between the worker's removal action and the system's response. These sensors detect removals automatically, providing precise measurement of the action without requiring complex direct measurement, thereby enabling automatic switching while maintaining speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces training times, minimizes errors, and lowers production costs by allowing workers to handle multiple assembly steps efficiently, with automatic switching and real-time feedback, enhancing the reproducibility and speed of assembly processes.
Implementation Method 1
The marking device (18) has at least two different marking functions... The marking device (18) in particular has at least one light source, in particular an LED.
Implementation Method 2
Above each small parts box (12) and/or each tool, a marking device (18) with at least two different marking functions and a removal detector (17) are mounted in the frame (11).
Data Source
Figure 1~2
Figure 3
AI summary
The workplace (1) has a frame (11) for holding small piece boxes (12) and/or tools, and a determination unit for independently determining termination of an assembly step and switching the assembly step to another assembly step or terminating an assembly operation. A marking device and a discharge detector e.g. proximity sensor and camera (10), are attached to the frame by the small piece boxes and/or the tools, where the marking device exhibits two different marking functions e.g. continuous light function and signal light function. The marking device has light sources i.e. LEDs.