CNC Machine Tool Time-Energy Control for Startup and Downtime Loss
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Solution Overview
Problem
Existing methods for assessing and controlling the time-energy efficiency of CNC machine tools do not effectively account for startup rates and extra startup frequencies, leading to inefficient energy use and increased production costs due to downtime-related energy anomalies.
Innovation Solution
A method that establishes a startup rate model and a time-energy efficiency model for CNC machine tools, incorporating total planned processing time, downtime, and extra startup frequency to monitor and control time-energy efficiency in real-time, providing an overlimit warning to maintain efficiency within target ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the CNC machine tool operates continuously without shutdown, then productivity is improved, but energy consumption increases due to standby energy during downtime
Solution Approach 1:
The patent implements periodic monitoring and assessment of time-energy efficiency through cyclic evaluation models. The system periodically assesses the relationship between startup rate, downtime, and energy consumption, enabling dynamic optimization of operational patterns to balance continuous production with energy conservation during standby periods
Solution Approach 2:
The patent changes key parameters including startup rate, downtime duration, and energy consumption thresholds to optimize the balance between productivity and energy loss. By adjusting these parameters dynamically based on real-time monitoring, the system identifies optimal shutdown and restart timing to minimize standby energy consumption while maintaining production schedules
2Productivity
If the startup rate of the CNC machine tool is increased to meet production demands, then productivity is improved, but energy efficiency deteriorates due to frequent extra startups
Solution Approach 1:
The patent performs preliminary assessment of production demands and schedules maintenance or shutdown activities in advance during low-demand periods. By predicting future production needs and preparing accordingly, the system avoids frequent emergency startups, thereby reducing extra startup energy consumption while ensuring productivity is maintained when needed
Solution Approach 2:
The patent implements real-time feedback mechanisms that monitor startup frequency, downtime patterns, and energy consumption. This feedback is fed into the time-energy efficiency assessment model, which dynamically adjusts operational recommendations to minimize extra startups while meeting production targets, creating a closed-loop control system for energy optimization
3Loss of energy
If downtime is reduced to improve time-energy efficiency, then energy efficiency is improved, but manufacturing precision may deteriorate due to insufficient maintenance time
Solution Approach 1:
The patent schedules maintenance activities in advance during predicted low-demand periods or between production batches. By performing maintenance proactively rather than reactively, the system ensures manufacturing precision is maintained through regular upkeep while minimizing the impact on overall downtime and time-energy efficiency
Solution Approach 2:
The patent dynamically adjusts downtime allocation based on real-time assessments of machine condition, production urgency, and energy efficiency metrics. The system flexibly optimizes the balance between maintenance time and operational time, ensuring manufacturing precision is maintained while minimizing energy loss during idle periods
4Loss of energy
If real-time monitoring of time-energy efficiency is implemented, then energy efficiency control is improved, but device complexity increases
Solution Approach 1:
The patent designs the monitoring system to perform multiple functions: tracking startup events, measuring downtime duration, calculating energy consumption, assessing time-energy efficiency, and providing control recommendations. By consolidating these functions into an integrated system rather than separate specialized devices, the patent reduces overall device complexity while achieving comprehensive real-time monitoring and control
Data Source
AI summary
An assessment and control method, system and device for time-energy efficiency of CNC machine tools. The method comprises: comprehensively analyzing the influence of factors of the startup rate and extra startup frequency of a CNC machine tool on the energy efficiency of the CNC machine tool, and constructing a mathematical model of the time-energy efficiency of the CNC machine tool and the startup rate and extra startup frequency of the CNC machine tool. The time-energy efficiency of the CNC machine tool is monitored to realize the overlimit warning function for the time-energy efficiency of the CNC machine tool to finally control the time-energy efficiency of the CNC machine tool within a target range. The present invention analyzes the influence of the downtime loss of the CNC machine tool on the energy efficiency of the CNC machine tool, and can realize overlimit warning for time-energy efficiency of the CNC machine tool.