Electron Beam Contour Deviation Compensation
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Solution Overview
Problem
Existing electron beam material-processing methods face inaccuracies due to geometrical deviations between actual and ideal processing contours, as well as magnetic deflections, leading to suboptimal welding quality.
Innovation Solution
A method where the electron beam's effective processing contour is determined by a scan motion beyond the ideal contour, measuring back-scattered intensity to graphically represent deviations, allowing for straightforward correction of these deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the working spot of the electron beam follows the ideal processing contour stored in the control device, then the electron beam path is well-defined and controllable, but the working spot does not strike the real processing contour due to geometrical deviations and magnetic deflections
Solution Approach 1:
The method performs a preliminary scan of the workpiece surface before actual processing to detect the real processing contour. This preliminary action identifies geometrical deviations and magnetic deflections, allowing the system to compensate for these errors in subsequent processing operations, thereby ensuring the electron beam accurately strikes the intended contour.
Solution Approach 2:
The system uses back-scattered electron beam intensity as a feedback signal to detect the actual processing contour. By monitoring intensity variations during a preliminary scan, the control device identifies deviations from the ideal contour and adjusts the electron beam path accordingly, creating a closed-loop control system that improves positioning accuracy.
2Measurement precision
If a scan motion is superimposed to detect the effective processing contour, then measurement accuracy improves, but the processing time increases
Solution Approach 1:
The method performs a scan motion that extends beyond the ideal processing contour on both sides to ensure complete detection of the effective contour. This excessive action guarantees that the entire relevant area is scanned, capturing all deviations accurately, while the scan is optimized to complete quickly before actual processing begins.
Solution Approach 2:
The contour detection scan is performed as a preliminary step before the actual thermal processing. By completing the measurement phase first, the system separates the time-consuming detection operation from the production processing, allowing accurate measurement without extending the critical processing time.
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 enables accurate representation and correction of processing contour deviations, improving welding precision by accounting for both geometric and magnetic influences without the need for additional equipment, ensuring the electron beam strikes the intended contour during thermal treatment.
Implementation Method 1
the intensity of the electron beam back-scattered from the workpiece is measured as a function of the deflection of the scan motion
Data Source
AI summary
A thermal material-processing method wherein between the working spot of an electron beam and a workpiece a relative motion is brought about. Prior to the actual thermal treatment an effective processing contour is ascertained, in that the working spot of the electron beam executes, in accordance with the stored data of an ideal processing contour, a relative motion in relation to the workpiece, and on this relative motion a scan motion is superimposed which is directed transversely to the ideal processing contour. In this manner, both geometrical and magnetically conditioned deviations of the points of incidence of the electron beam on the workpiece can be compensated.