Active-Correction Machining Head for Fast Robotic Positioning Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current machining systems with robots face challenges in achieving high precision and speed due to deformation of parts and robots under pressure, leading to positioning errors that require repositioning the entire robot arm, which is slow and imprecise.
Innovation Solution
A machining head with active correction that includes a spindle with localized movement independent of the robot's movement, equipped with position and angle sensors, and a specific operating procedure that allows for real-time correction of the machining position without repositioning the robot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the robot arm is repositioned to correct machining position errors, then positioning accuracy is improved, but processing speed deteriorates due to the time required to move and reposition the entire robot arm
Solution Approach 1:
The system segments the correction function from the robot arm by introducing a separate localised movement system at the machining head. This allows the robot arm to remain stationary while only the machining head components move for correction, resolving the contradiction between accuracy and speed.
Solution Approach 2:
A localised movement system acts as an intermediary between the robot arm and the machining operation. This intermediary handles fine position and angle corrections independently, eliminating the need to reposition the entire robot arm and thus maintaining high processing speed while achieving precise correction.
2Stability of the object's composition
If the robot presses the head against the part to maintain positioning, then positioning stability is improved, but deformation of the part or robot causes the head to slip and lose normality
Solution Approach 1:
The system uses sensors to detect the actual position and angle of the machining head, providing feedback to the control system. This feedback loop enables real-time detection and correction of deviations caused by deformation or slipping, maintaining both stability and precision simultaneously.
Solution Approach 2:
The localised movement system provides dynamic adjustment capability at the machining head, allowing continuous compensation for deformation effects. This dynamic correction mechanism resolves the contradiction by adapting to changing conditions while maintaining positioning accuracy.
3Manufacturing precision
If multiple iterations of error detection and robot repositioning are performed to achieve required tolerances, then manufacturing precision is improved, but the time required increases significantly
Solution Approach 1:
By segmenting the correction function to the localised movement system, the patent eliminates the need for repeated robot arm repositioning iterations. The localised system can perform corrections quickly in a single or minimal number of adjustments, achieving required tolerances without significant time loss.
Data Source
AI summary
A machining head with active correction of the type used in association with a robot to carry out fast high-precision machining tasks especially on parts for the aeronautical production industry that has localised position and angular sensors, and a machining motor or spindle provided with localised movement with respect to the head casing, independent of the robot's movement, this movement being preferably both displacement and rotation with respect to both, allowing active correction of the machining position is disclosed. The invention provides the main advantage of allowing errors by the robot or deformation of the part to be machined, in positioning for machining, to be corrected in a localised very fast and accurate way, without the need to re-position the robot.