www.melanexjou.fora.pl

[loiwtjsf]

Oval tube boiler heating surface imaging method according to the angle through the choice of


15.75 shown in Table 1, when the tube diameter and smaller,[link widoczny dla zalogowanych], oval-shaped seam to maintain the same effect according to the Q angle increases from the g appropriate, on the contrary, the diameter increases, the transillumination angle decreases. Hee angle through impact to ensure that the weld under the premise of the pitch g + to avoid taking over the weld joints of the upper and lower overlapping longitudinal cracks at the same time improve the detection rate of linear defects, and reduce distortion defects. According to the above point of view should be as small as possible, that is, the more flat oval image of the weld as possible. There experiments show that the general could be detected the day the wall thickness = 20 ≤ lOmm, natural cracks or deep 1ram thickness ≤ 5ram, deep 1ram, width 0, Olmm artificial cracks. Ellipsoid according to the angle 0 through a slit of 4O rh defend a circular relationship between the amount of space shown in Figure 2 1455'I ● IaI-hide 2 『virtual feast with head welding chain of 9 within the ellipse. Division 4 from the field relationship between the choice of eccentricity in the elliptical imaging. Camera bag flat on the film, the focus away from the weld center surface radiation source at a distance called the eccentricity s. To the central part of the ray beam or the edge of the weld through the photos were seized (see Figure 2), eccentricity should be appropriate, in accordance with the oval opening I: J Width g size calculated;. = L / L: (6 + Pi) = [(F-D) X (6 + g)] / b where. An eccentricity, mm Si surface distance of a radiation source to the tube, mmb weld width, penetration according to a thickness of 133 133 Si, 133,133 for a wide oval opening, 133133F a focal length, 133mD a pipe diameter, 133,133 according to the formula will be used heating surface tubes eccentricity 5. Size are listed in Table 2. Table 2 shows the analysis, eccentricity 5. Too narrow root defects (cracks, not suitable for welding, etc.) may be missed, or affect the distortion is too large and difficult to judge. Eccentricity s. Too small, so the source side and the film side of the weld heat affected zone of weld defects not easily separated. \Focal length of straight pipe right foot size table clam slit width between the eccentricity of quantum names Ray tube leave right foot Miao Zhi D + {degrees F b from g to move away from the wall enclosure Yan Mo 3l46 \51 × 1060O538 interest over a 51 × 61O194 who clamor pad catch to move the second heat din 51 × 12 Tuo temperature reheater temperature and then fight 0 × 53117 0 × 56006Z10 heat spell spell wall surgery province of the female G 0 × 710180 0 × 9 fight Huang Yan,[link widoczny dla zalogowanych], the former studio twilight over 3103 research 6x9600781010152 R and eccentricity of the oval space g weld the relationship shown in Figure 3. 5 Conclusion on heating surface tubes oval Radiographic imaging technology, through the photo angle, eccentricity distance,[link widoczny dla zalogowanych], distance calculation and oval table in the data analysis, drawn from among the choices that affect three important factors in weld inspection. but also gives the double-wall double projection angle oblique transillumination, eccentricity , asked the Ellipse from the relationship between the map. for the future development of heating surface tubes oval Radiographic techniques, rational use of testing parameters, providing a theoretical basis. Figure 3 Pak heart distance & Welding shaggy oval ring with news from the inside g, Ying captive (continued from page 3S) fine zO, sub-temperature firing and other new technology to improve the piezoelectric oscillator. 3.2 power with piezoelectric ceramic vibrator for ultrasonic cleaning, ultrasonic welding , ultrasonic drilling, such as power ultrasonic equipment, electronics, automotive, textile, medical, chemical, Seiko, sports and entertainment industry has a broad application markets and good prospects. 3.3 due to the limitations of technical means, performance improvement also desired. If you use a more advanced process equipment (such as jet milling, spray granulation, etc.), material composition with the performance of the body will be more fully exploited; and lower cost, the practicality of the design to homes, small size and versatility of products, etc. for more in-depth work, will further expand the power of ultrasound equipment in the civilian market and wider application of a more positive meaning. 4 References l Raymond Chan literature. piezoelectric ceramic materials and devices. South China Institute of Technology Press 2ChafactefizationofPiezoelectricCe-ramicsforPowerUltrasonlcs, Ferro-electr [cs.1990, Vo1.109. PP259-2643 Standard Li Rong. electronic ceramics process principles, Huazhong Institute of Technology Press,[link widoczny dla zalogowanych], 4-way memory brother. Ultrasound - ultrasound power and its application. one by one, Shaanxi Normal University Press .。~,//,[link widoczny dla zalogowanych],,/

相关的主题文章：


[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]

[link widoczny dla zalogowanych]