CNC Cutting Tool Compensation Using ARIMA Contour Feedback
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Solution Overview
Problem
Existing cutting tool compensation methods in CNC machines require significant manual effort and time, leading to inconsistent material processing yields due to inconsistent adjustments.
Innovation Solution
A method and device that use a computing device with a communication unit, processor, and storage to automatically calculate and apply compensation values to the cutting tool based on detected workpiece contours, employing an Autoregressive Integrated Moving Average (ARIMA) model to stabilize compensation values and improve processing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of CNC machine table is performed according to compensation value, then cutting tool compensation can be achieved, but the process requires more manpower and takes a long time
Solution Approach 1:
The patent replaces the manual mechanical adjustment process with an automated system. The CNC machine automatically adjusts the machine table position based on compensation values calculated by the processing control device, eliminating manual intervention while maintaining compensation accuracy. This substitutes human-operated mechanical adjustment with automated computer-controlled mechanical adjustment.
Solution Approach 2:
The system enables self-service automation where the processing control device automatically calculates compensation values based on workpiece contour detection data and autonomously controls the CNC machine table adjustment without requiring technician intervention. The system serves itself by integrating detection, calculation, and adjustment functions into one automated workflow.
2Reliability
If manual adjustment of CNC machine table is performed according to compensation value, then cutting tool compensation can be achieved, but the yield rate of processed material is inconsistent
Solution Approach 1:
The system implements a feedback mechanism where the contour of the processed workpiece is detected by a measuring machine, and this detection data is fed back to the processing control device. The control device uses this feedback information to calculate accurate compensation values that account for actual machining deviations, thereby improving the consistency of material processing yield across different workpieces.
Solution Approach 2:
The patent replaces inconsistent manual adjustment with automated CNC-controlled adjustment. The system uses computer-calculated compensation values to precisely control the machine table position, eliminating the variability introduced by manual adjustment techniques and ensuring consistent processing yields.
3Productivity
If automated control system is implemented, then productivity and consistency are improved, but device complexity increases
Solution Approach 1:
The processing control device performs multiple functions: it detects workpiece contours, calculates compensation values using ARIMA time series models, and controls the CNC machine table adjustment. By integrating these functions into a single multi-functional control system, the patent reduces the need for separate dedicated devices for each function, thereby managing complexity while maintaining productivity benefits.
Solution Approach 2:
The patent introduces a processing control device as an intermediary between the measuring machine and the CNC machine. This intermediary component centralizes the control logic and compensation calculation processes, coordinating the interaction between detection and execution systems. By consolidating control functions in one intermediary device, the system manages complexity through centralized intelligence rather than distributed complexity.
Data Source
AI summary
A method for controlling a cutting tool in a CNC machine and a device using the method receives contours of workpieces generated by a first measuring machine, inputs the first contour parameters into a calculation model to output first compensation values of the cutting tool, the calculation model being a time sequences model established according to contour sets of the workpieces, and the contour sets include at least one historical contour of the workpieces. The device further determines whether the first compensation values of the cutting tool are greater than, equal to or smaller than a preset value, and sends the first compensation values of the cutting tool to a machine.