BRANCH:涉及领域 Foundries, Machine construction
TASK:任务 Wall thickness measurement on cast
A nondestructive method is required to detect the typical defect in casting, viz. “core mismatch”.
In consequence of this mismatch, reduced wall thicknesses occur leading to a failure of the camshaft in operation because of its lean geometry and due to the extreme dynamic load.
The recommended solution is to measure the wall thickness on the bearing points.
The simple, annular geometry of these points allows to carry out the test on the shaft as cast. Further processing actions on any defective parts are thus excluded.
This method makes it possible to recognize the core mismatch by a reduced wall thickness and excessive wall thickness opposite (180°).
The waterflow (squirter/bubbler) technique is applied according to the arrangement shown in the sketch.
This ensures a constant coupling in the area of the bearings around the entire circumference during camshaft rotation.
Typical linear scans 典型的线性扫查
(wall thickness [mm] around the circumference [360o])
Ultrasonic flaw detectors: 设备 USD 15X or USPC 2100
Probe:探头 H 2 KF
Accessories:附件 Multiplexer MUX D
Software :软件 UltraMAP