Tool Path Display with Deceleration Factor Identification
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Solution Overview
Problem
Existing machine tool controllers lack a method to effectively display the correspondence between tool path points and speed restrictions, making it difficult to determine the conditions under which the tool center point speed is restricted during machining.
Innovation Solution
A tool path display apparatus with a numerical controller that calculates and displays two- or three-dimensional coordinate values of the tool command position, using status signals and display colors to indicate speed restrictions, allowing for easy identification of speed restriction conditions along the tool path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If speed restriction processing is performed under various conditions to ensure precision machining, then manufacturing precision is improved, but it becomes difficult to determine the condition under which speed is restricted at each point on the tool path
Solution Approach 1:
The patent applies color coding to different segments of the tool path to indicate various speed restriction conditions. Each color corresponds to a specific restriction condition (e.g., corner rounding, acceleration limits, feed rate limits), allowing operators to visually identify which condition is active at any given point on the tool path without complex displays or additional measurements.
2Manufacturing precision
If the tool center point speed is restricted to satisfy precision conditions, then manufacturing precision is improved, but the productivity decreases due to reduced tool speed
Solution Approach 1:
The tool path is divided into multiple segments based on different restriction conditions, with each segment displayed in a distinct color. This segmentation allows the system to apply speed restrictions only where necessary for precision machining while maintaining higher speeds in segments where precision constraints are not active, thereby preserving overall productivity.
Solution Approach 2:
The speed restriction is dynamically adjusted along the tool path based on the specific conditions at each segment. Rather than applying a uniform speed limit, the system varies the speed restrictions according to the local requirements indicated by different colors, optimizing the balance between precision and productivity across the entire machining path.
Data Source
AI summary
A numerical controller calculates a first position command from a machining program, converts the first position command into a second position command for restricting a tangential speed of a tool, and delivers the second position command and a status signal indicative of the achievement of the conversion of the first position command into the second position command to a tool path display apparatus. The tool path display apparatus displays the path of the tool in a color corresponding to the status signal and can thereby determine the point on the tool path at which the speed restriction is performed.