Workpiece Referencing by Camera-Guided Probe Alignment
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Solution Overview
Problem
Current methods for determining the X-Y-Z reference coordinates of a workpiece in a processing machine are time-consuming and prone to errors, requiring manual input of coordinates and parameters, which can lead to collisions and damage, especially with complex surfaces, and involve significant costs for sensor technology for fully automated solutions.
Innovation Solution
A method that allows for the easy and reliable determination of X-Y-Z reference coordinates by selecting a target point on a two-dimensional image of the workpiece, with the Z reference coordinate being automatically determined, using a camera device and a probe that moves along a line of sight to avoid collisions, and converting X-Y display coordinates into actual spatial coordinates within the processing machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual input of coordinates and parameters is used for determining reference coordinates, then the process can be performed with simple equipment, but the process is time-consuming and prone to errors
Solution Approach 1:
The patent replaces manual mechanical coordinate input with an optical imaging system (camera) that automatically captures workpiece images and calculates reference coordinates through image processing and coordinate transformation algorithms, eliminating manual entry errors and reducing time consumption
Solution Approach 2:
The system enables self-service automated determination of reference coordinates by using the camera to capture images, automatically processing the images to identify workpiece features, and computing the reference coordinates through coordinate transformation without requiring manual intervention
2Productivity
If fully automated determination processes with sensors are used, then the process is faster and more accurate, but the device complexity and costs increase significantly
Solution Approach 1:
The patent makes the camera device multi-functional by using it for both workpiece observation/imaging and reference coordinate determination, eliminating the need for dedicated expensive sensor systems while achieving automated high-speed coordinate acquisition
Solution Approach 2:
The system creates a two-dimensional image copy of the three-dimensional workpiece using the camera, then processes this copy through coordinate transformation algorithms to determine reference coordinates, avoiding the need for complex three-dimensional sensing systems
3Ease of manufacture
If manual probe movement to initial coordinates is required, then equipment costs are reduced, but the ease of operation decreases and collision risk increases
Solution Approach 1:
The patent replaces manual mechanical probe positioning with automated image-based coordinate calculation, where the camera captures the workpiece and the system automatically computes the initial coordinates and probe movement paths, eliminating manual positioning difficulties and collision risks
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
This method simplifies the input process, reduces the risk of errors, and automates the determination of reference coordinates, enabling precise and efficient positioning of the workpiece without requiring extensive sensor technology, thus improving accuracy and reducing operational complexity and costs.
Implementation Method 1
a first image of the workpiece arranged in the processing machine is created with a camera device
Implementation Method 2
the probe performs measuring movements towards the workpiece and, by contacting the workpiece, the Z reference coordinate is determined
Data Source
Figure 1~2
Figure 3
Figure 4a~4c
AI summary
In a method for referencing a workpiece (2) arranged in a machine tool, an image of the workpiece (2) is first of all created using a camera device (5) of the machine tool and is then displayed on a display device (6). An X-Y display coordinate (9) is selected by a user using the displayed image. A Z reference coordinate is then determined in an automated manner. An X-Y-Z starting coordinate (7) can be calculated on the basis of the Z reference coordinate determined in an automated manner and the X-Y display coordinate (9) input by the user. A measuring probe (8) of the machine tool is then moved in an automated manner to the X-Y-Z starting coordinate (7) and the X-Y-Z reference coordinate of the workpiece (2) is determined on the basis of the position of the measuring probe (8), as predefined by the X-Y-Z starting coordinate (7), by means of a suitable determination method using the measuring probe (8). In order to determine the Z reference coordinate, the measuring probe (8) is moved through the region which can be captured by the camera device (5) along a viewing beam (16) starting from the camera device (5) in the direction of a target point (26) until the measuring probe (8) touches the workpiece (2).