NC Machining Feed-Rate Coding for Reliable Workpiece Identification
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Solution Overview
Problem
Existing methods for identifying and storing information on workpieces are unreliable, as they rely on detectable surface features that can change during processing or handling, and do not allow for active and readable information storage for further processing or later use.
Innovation Solution
A method for machining workpieces on numerically controlled machine tools that encodes information onto the workpiece surface using a pattern, such as a barcode or QR code, by controlling the tool's movement based on predefined control data that changes the feed rate to generate an optically readable code, enabling the storage and later reading of information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If characteristic surface features are used for workpiece identification, then identification is possible, but the identification becomes unreliable when surface features change during processing or handling
Solution Approach 1:
The invention applies a code to the workpiece surface before machining operations begin. This code serves as a stable identification marker that is created in advance and remains unchanged throughout subsequent processing steps, eliminating the problem of relying on features that may change during handling and processing.
Solution Approach 2:
Instead of using the workpiece's natural surface features for identification, the invention creates a copied representation (the code) that encodes the identification information. This code is a deliberate marking that reproduces the necessary identification data in a stable, machine-readable format that is independent of the workpiece's physical characteristics.
2Loss of information
If no active information storage is implemented on the workpiece, then the workpiece can be processed, but there is no possibility of storing or depositing information for further processing or later use
Solution Approach 1:
The invention combines the machining operation with the code application process. The code is applied to the workpiece surface during the machining process itself, merging two operations (machining and information storage) into a single integrated process, thereby eliminating the need for separate information storage steps.
Solution Approach 2:
The workpiece receives its identification code as part of its manufacturing process. The machining system automatically applies the code to the workpiece during processing, making the workpiece self-identified without requiring additional external steps for information storage or tagging.
Data Source
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AI summary
The inventive method for machining a workpiece WS on a numerically controlled machine tool 1000 with a tool WZ, comprising the following step: controlling a relative movement of the tool WZ to the workpiece WS based on predetermined control data for machining the workpiece WS, wherein the control data specify the relative movement of the tool WZ to the workpiece WS to be controlled at least in a first machining direction VR and a feed rate during the relative movement of the tool WZ to the workpiece WS at least in the first machining direction VR, wherein the control data specify changes in the feed rate during the relative movement of the tool WZ to the workpiece WS at least in the first machining direction VR, wherein the changes in the feed rate are predetermined on the basis of a pattern 200 that encodes predetermined information.