Machine Tool Angle Compensation During Tool Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Machine tools experience angle errors during tool extraction from a workpiece, leading to chatter marks and degradation of processing quality due to the inability to absorb forces along the Z-axis without causing vertical angle errors.
Innovation Solution
A method for dynamically compensating angle errors in machine tools involves detecting the actual position and force/acceleration of the toolholder in the vertical direction, calculating the angle error, and adjusting the toolholder to a target position using a compensation value, thereby reducing the risk of chatter marks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the tool is extracted from the workpiece along the advancing direction, then the machining cycle is completed, but angle errors occur in the vertical direction causing chatter marks and degradation of processing quality
Solution Approach 1:
The patent applies preliminary action by determining the angle error based on force and acceleration pilot control values before the tool extraction is completed, and calculating the necessary compensation value in advance. The vertical position compensation is pre-calculated based on the detected force/acceleration data, allowing the toolholder to be positioned correctly before the extraction operation finishes, thereby preventing chatter marks while maintaining productivity.
2Device complexity
If the force along the Z-axis is absorbed connection-free by the machine frame, then the structure remains simple, but angle errors occur in the vertical direction during acceleration or machining
Solution Approach 1:
The patent implements feedback by detecting the actual force and acceleration pilot control values during tool operation, determining the angle error based on these detected values, and using this feedback information to calculate compensation values. The system continuously monitors the force along the Z-axis and adjusts the vertical position of the toolholder based on the detected deviations, thereby maintaining angle accuracy without modifying the machine frame structure.
3Manufacturing precision
If the toolholder position is adjusted in real-time to compensate angle errors, then processing quality is improved, but the control system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the control system to automatically determine angle errors from force and acceleration pilot control values, calculate compensation values, and adjust the toolholder vertical position without requiring external intervention or complex additional sensing systems. The system uses existing pilot control data to self-correct the angle errors, thereby improving workpiece quality while minimizing the increase in control system complexity.
Data Source
AI summary
A method for dynamically compensating angle errors when operating a machine tool that includes at least one fixture for a workpiece, in or on which a workpiece can be secured, at least one toolholder, in or on which a tool, in particular a drill, can be secured and can be rotationally driven by a rotational drive of the toolholder. The rotational drive including at least one horizontal drive by which the toolholder—for purposes of machining the workpiece—can execute movements in at least one horizontal plane of the machine tool. The machine tool further includes at least one vertical drive by which the toolholder can execute movements in a vertical direction of the machine tool, and at least one controller to which the rotational drive, the horizontal drive, and the vertical drive are functionally assigned.