Waveform Display of Machining Surface Vertical Errors
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Solution Overview
Problem
Existing methods struggle to effectively isolate and display the vertical component of errors in machining processes, making it difficult to grasp and address these errors in machine tool operations.
Innovation Solution
A waveform display device and method that acquires position and machine information from a machine tool, calculates machining point coordinates, sets a reference surface, and displays distances from these points in a waveform, allowing for easy visualization of vertical errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the path of machining points is displayed by superimposing actual measured path on programmed path, then the error between actual and intended machining can be visualized, but it becomes difficult to grasp only the vertical component of the error which is most important for machining surface quality
Solution Approach 1:
The invention extracts and displays only the vertical component of machining errors by calculating the distance from each actual machining point to the reference surface. This isolates the most critical error component affecting surface quality, allowing operators to focus on vertical deviations without being distracted by horizontal position variations.
Solution Approach 2:
The invention transforms the three-dimensional machining point coordinates into a two-dimensional waveform display where the vertical axis represents the distance from the reference surface. This dimensional transformation makes the vertical error component visually prominent and easily interpretable as a waveform pattern.
2Measurement precision
If complex error analysis methods are used to separate vertical error components, then measurement precision improves, but the complexity of the display system and ease of operation deteriorates
Solution Approach 1:
The invention replaces complex mechanical or manual measurement methods with a computational approach. By using coordinate data from the machine tool and performing mathematical calculations to determine distances from the reference surface, the system achieves precise vertical error measurement through software processing rather than complex physical measurement apparatus.
Solution Approach 2:
The invention changes the parameter representation from three-dimensional coordinates (X, Y, Z) to a single parameter representing the perpendicular distance from the reference surface. This parameter transformation simplifies the data structure and display requirements while maintaining measurement precision.
Data Source
AI summary
A waveform display device includes a position information acquisition unit configured to acquire, from a controller for controlling a machine tool, position information indicating a position of a driving axis of the machine tool during machining of a workpiece, a machine information acquisition unit configured to acquire machine information indicating axis configuration of the machine tool, a machining point coordinate calculation unit configured to calculate a coordinate of a machining point of a tool installed to the machine tool, on the basis of the position information and the machine information, a reference surface setting unit configured to set a targeted machining surface of the workpiece as a reference surface, a distance calculation unit configured to calculate distance from each of a plurality of the machining to the reference surface, and a waveform display unit configured to display the calculated distances of the plurality of machining points in a wave form.