Radial tire die subsurface defect nondestructive detection apparatus and method thereof
A radial tire and tire mold technology, applied in the direction of using radiation for material analysis, material magnetic variables, etc., can solve the problems of high-precision positioning detection and identification of radial tire molds, and achieve improved accuracy, comprehensiveness, and detection efficiency. Effect
Active Publication Date: 2014-11-05
SOUTH CHINA UNIV OF TECH
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[0006] The purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, to provide a device and method for non-destructive detection of subcutaneous defects in radial tire molds; , Technical issues of detection and identification
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[0055] like Figure 1 to Figure 6 shown. The device for non-destructive detection of subcutaneous defects in radial tire molds of the present invention includes: a ray detection system for identifying and locating tire mold pore defects; used to assist the ray detection system to prevent missed inspections caused by steel sheets in the subcutaneous area of tire molds eddy current testing system;
[0056] The radiation detection system includes: an X-ray source 11, an area array detector 12 (high resolution amorphous silicon), a data acquisition and transmission system 13, a computer image processing system 14, a transmission mechanism 16 of the tire mold, and a transmission mechanism 16. control system 15;
[0057] The emitting place of the X-ray source 11 and the receiving place of the area array detector 12 are respectively equipped with front and rear collimators; the photodiode of the area array detector 12 is connected with the data acquisition and transmission system...
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The invention discloses a radial tire die subsurface defect nondestructive detection apparatus and a method thereof. The apparatus includes a ray detection system for identifying and positioning the blowhole defects of a tire die, and an eddy current detection system used for assisting the ray detection system to prevent leak detection caused by the steel piece shielding of the subsurface area of the tire die. A sub-pixel extraction algorithm based on gray level integration is adopted to position the blowhole defects of the tire die to a sub-pixel grade, the characteristics of the defects are integrally analyzed through a synergetic defect recognition method based on a synergetic theory, and high efficiency identification of specific defects is realized for all kinds of defects in the radial tire die. The apparatus and the method realize the high precision and high efficiency detection of the subsurface detects of mass radial tire dies, also realize the effective classification of the dies, fill the gap in the radial tire die subsurface defection field, effectively ensure the product quality of the radial tire die.
Description
technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a device and method for nondestructive testing of subcutaneous defects of radial tire molds. Background technique [0002] With the development of radial tire products in my country in the direction of high precision and safety, higher requirements are put forward for the quality and technical level of radial tire molds. However, tire molds are prone to defects such as air holes during the precision casting process. The existence of subcutaneous defects seriously affects the fatigue strength and toughness of radial tire molds, and at the same time reduces their service life. Therefore, the tire mold industry urgently needs to develop, promote and apply professional testing equipment with higher efficiency and higher precision, and continuously improve and perfect the detection method of subcutaneous defects in radial tire molds. [0003] At present, most of the de...
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IPC IPC(8): G01N23/04G01N27/90
Inventor 洪晓斌倪蕾周建熹
Owner SOUTH CHINA UNIV OF TECH