Machine Tool Control for Finishing Allowance in Vibration Cutting
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Solution Overview
Problem
Conventional machine tools experience excessive load on tools during finish-cutting after vibration cutting due to uncut portions on the workpiece surface, which can lead to tool damage and reduced accuracy.
Innovation Solution
A machine tool with a finishing allowance calculation and determination system that modifies vibration conditions or adds additional cutting processes to ensure the finishing allowance does not exceed a threshold, preventing excessive load on the tool during finish-cutting by calculating and managing the remaining uncut portions after vibration cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vibration cutting is performed with large vibration amplitude to remove material efficiently, then productivity is improved, but the finishing allowance remaining on the workpiece increases causing excessive tool load during finish-cutting
Solution Approach 1:
The control device calculates the finishing allowance remaining on the workpiece after vibration cutting based on vibration cutting conditions (amplitude, depth of cut, feed rate) and compares it with a predetermined threshold. This feedback mechanism allows dynamic adjustment of cutting parameters to ensure the finishing allowance remains within safe limits, preventing excessive tool load during finish-cutting while maintaining high productivity during vibration cutting.
2Productivity
If vibration cutting is performed to achieve predetermined diameter quickly, then manufacturing speed is improved, but uncut portions with contour shape projecting radially outwards remain on the workpiece surface
Solution Approach 1:
The control device performs preliminary calculation of the finishing allowance before finish-cutting begins, using the calculated value to determine whether additional cutting is necessary. This preliminary action ensures that the workpiece surface is properly prepared before the final finishing operation, preventing projection defects while maintaining efficient vibration cutting speeds.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents excessive load on tools during finish-cutting, reducing the risk of tool damage and improving the accuracy of the finished surface by ensuring the finishing allowance is within safe limits.
Implementation Method 1
a vibrating means for vibrating the workpiece held by the workpiece holding means and the tool held on the tool post relative to each other in a direction perpendicular to the axis of the workpiece under predetermined vibration conditions
Data Source
AI summary
A machine tool and a control device therefor, wherein vibration cutting of a workpiece is carried out by means of a tool and wherein, after the vibration cutting, finish-cutting is carried out for cutting a finishing allowance of the workpiece by means of the tool, without relative vibration between the workpiece and the tool, by relatively rotating the workpiece and the tool and relatively moving them in the feed direction. According to the invention, before the vibration cutting, a finishing allowance calculation means calculates a finishing allowance remaining on the workpiece after vibration cutting has been completed, and a determination means determines whether or not the finishing allowance as calculated by the finishing allowance calculation means is less than, or equal to a predetermined threshold value.