Evaluating the optimization effect of a DC brushless motor assembly line hinges on establishing a quantitative indicator system covering three core dimensions: synergy, flexibility, and precision. Data comparison is then used to verify the actual effectiveness of bottleneck breakthroughs. The following is the specific evaluation framework and methodology:
1. Synergy Evaluation: Measuring the overall production line efficiency. Poor synergy leads to process waiting times, cycle time imbalances, and low OEE (Overall Equipment Effectiveness).
Key Indicators:
OEE (Overall Equipment Effectiveness) = Availability × Performance × Quality; Target to improve to over 85%
Cycle Time: Time to complete production on a single motor; optimization should reduce this by 10%~30%, e.g., from 60 seconds to 45 seconds.
Process Waiting Time Percentage: Through time analysis, assess whether upstream and downstream waiting times have decreased by more than 50%.
Signal Transmission Response Speed: PLC command response delay from one station to the next ≤0.5 seconds.
Example: If the winding station completes and automatically triggers the balancing correction station to start, and there is no backlog, it indicates good coordination.
2. Flexibility Assessment: Measures the ability to quickly switch between multiple models. Insufficient flexibility limits the ability to handle small-batch orders; long changeover times are a typical pain point.
Key Indicators:
Changeover Time: Downtime for switching from production model A to model B, aiming to reduce from 2 hours to within 30 minutes.
Number of Compatible Models: Support for a wide range of motor specifications, including outer diameter (Φ50–150mm) and stack thickness (20–80mm), on the same production line.
Ease of Program Switching: One-click access to different process parameters (such as pressing pressure and winding turns) via HMI, eliminating the need for manual resetting.
Production lines supporting modular quick-change fixtures and standardized interfaces significantly improve flexibility.
