Introduction to the Structure of Casting X-ray Testing System
Date: 2025-12-02Read: 0
The casting X-ray detection system is an industrial non-destructive testing equipment that integrates radiation generation, detection imaging, mechanical transmission, and safety protection. Its core consists ofX-ray generation system, detection imaging system, mechanical transmission system, protection and control systemComposed of four modules, each module works together to achieve precise detection of internal defects in castings. The specific structure is as follows: -
X-ray generation system
As the core power source of the equipment, it is responsible for generating high-energy X-rays that penetrate castings, mainly including X-ray tubes and high-voltage generators. X-ray tubes are divided into sealed and open types. The sealed type is suitable for conventional testing, while the open type can replace tungsten targets, molybdenum targets, and other materials to adapt to different castings; The pipe body is equipped with an oil or water cooling system to avoid overheating and damage during operation. The high-voltage generator provides stable high-voltage current ranging from 10kV to 450kV, accurately controls X-ray energy and intensity, meets the penetration requirements of castings with different thicknesses and densities, and ensures significant differences in radiation attenuation between defect areas and substrates. -
Detection imaging system
Undertaking the functions of radiation signal conversion and image generation, the mainstream is digital imaging components, including detectors, image acquisition cards, and processing software. The detector is mainly a flat panel detector (DR), which can directly convert X-rays penetrating the casting into digital electrical signals with a resolution of micrometers, fast imaging speed, and clear image quality; Some high-end systems are equipped with linear array detectors to meet the requirements of CT tomography scanning. The image acquisition card and software are responsible for signal processing, achieving real-time display, enlargement, and storage of images. Some also integrate AI algorithms to automatically mark defects. The traditional film imaging system consists of film and cassette, with low cost but low efficiency, and is only used for basic detection. -
Mechanical transmission system
Used to adjust the posture of castings and ensure full coverage of testing, the core includes a worktable, fixture, and motion mechanism. The workbench can achieve multidimensional movements such as translation, rotation, and lifting. Medium sized models have a load-bearing capacity of 1-50kg, while large models can reach several tons, suitable for testing needs ranging from small components to large machine tool castings. The fixture adopts anti radiation and anti slip design, which can fix castings of different shapes such as circular and irregular shapes; The motion mechanism consists of a motor and guide rails, running smoothly to ensure accurate casting position during imaging. -
Protection and Control System
Ensure the safe operation and convenient operation of equipment. The protective body is made of lead plate or lead alloy, which wraps around the radiation occurrence and detection area, complies with the GB 18871 radiation safety standard, and prevents radiation leakage; The protective door is equipped with an interlocking device, which automatically cuts off the radiation when the door is opened. The control system integrates a control panel, display, and emergency stop button, which can set parameters such as radiation dose and detection speed. Some parts support remote control to avoid personnel coming into close contact with radiation sources, while recording detection data, which meets the requirements of quality system management.