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Press-fit parts of the railway vehicle axle ultrasonic testing

The distance the probe mobile S, using the empirical formula L5: l; S: h the depth of the fatigue crack can be obtained by h. Li dread, when the fatigue crack reflection waveform in the screen to locate later. The probe can be proud of weeks to move along the journal,[link widoczny dla zalogowanych], and by measuring the distance along cross reflection, measured after repeated after. Can be calculated crack length. L. r = L - 2Dtg ~ where: a lack of tread length (mm) L ~ probe to move along the journal from the kitchen (mm) D an axle journal diameter (mm) expansion of a number of semi-angle of the probe. Dig: 2.5MHzK = l angle probe with probe 1 side mounted D-type axial fatigue cracks Department. 140ram known L = 96ramD half spread angle of a population: 8.2. According to the above equation Lx; L a 2Dtg @ a 96-2 × l4O × 0.143 = 56ram fatigue crack length of 56mm 30ram crack if the probe moves back and forth wave disappeared, the fatigue crack depth: h:; 30:2 ( mm) r '4 testing waveform analysis of both analysis and determine the correct waveform on the screen. Accuracy and identification of each / BU transition reflects the true reflection is very important now 2.5MHzK = 1 angle probe detection of the various parts of the axle press-fit into the transition type drawing for reference in Table 1, testing operations as shown in Figure 4. {J quay other fields in recent years as computers and the rapid development of automation projects. Automated ultrasonic testing, emblem machine, miniaturization is the main direction of development. Automated testing can improve the detection speed. Operators to reduce and eliminate some of the human factors of instability and hardship of people throughout the rain is not a different judge, to ensure product quality, reduce labor intensity and improve efficiency have great significance,[link widoczny dla zalogowanych], especially with the computer interface. The ultrasonic signal into a digital signal. According to the workpiece to detect the signal characteristics of formulated management collection and data processing methods. If only to collect relevant injury wave (echo) the magnitude, only to collect relevant injury (lack of dance) response signal. Thus discarding the beginning of wave and interference signals,[link widoczny dla zalogowanych], to simplify data processing, the number of a 3】 one \Necessary to save the signal acquisition, a clear cut defects to determine standards and assumed knowledge Ba. Resistance to high-speed processing of digital intelligent Velvet crane. Ultrasonic testing reference l 1. Machinery industry out of j; tray Club 2 {tadpole ultrasonic inspection technology. Nanchang Institute of Aeronautical Press 3 ships crossing ultrasonic flaw detection. China Shipbuilding Industry Press head office table】 surface wave Tong butterfly fired rubber j injury analysis and testing to determine lingering wave waveform analysis and determine the sequence order】 button wheel axle U Xuan granted special acoustic resistance IT axle, wheel small-minded anti-Xi l interface is similar to 5 』the interface strength of its serious bad, wearing bleed at the nose plate, and no interface waves. -L method to determine material into the well shaft without hsiang ripple L ---- r - a serious bad Ba. 02ml axle and wheel acoustic impedance Yan teaching materials too. Sound waves enter the interfaces have strict internal axle. Yan eclipse set to re-grease lack of community found within the armpit, a strong magnitude 6 planes to go home is not press-fit part of the Department of the axle wheel seat with white spots and pores of oil is 03 - # 3 every song with waves pound axle due to grain coarsening, pressure mounted axle sub-give her rustic face with grease capsule bit there, but the axle, the drum hub Yan Lo good contact shoes 7 grain control axle torque estimation of crack depth too. A fatigue crack refuse, dumped oil with rust -4 decay even touch the axle is too coarse grain. Mino pressure in parts of IT goods fatigue caused by the reflection on the shoe industry, regardless of 8 vessels pattern,[link widoczny dla zalogowanych], but the interface appeared ignorant of the reflected wave-like surface waves followed by coarse grains axle fatigue crack refuse, but not deep (on the next move 29 page) can lead to reduce the main reason. Testing method CM3. Guangzhou; Guangdong Science and Technology Press. 19813 conclusion. PAPADAKSEP · Phy ~ ica. . \) for 40c steel workers in terms of the same microstructure of a f5t. chast.cs shed the milk teeth cterjngultrasoaic black es the higher the greater; instee1CJ3.JofApp1Phys, 1963,34:265 a 269i reference Li Jing,[link widoczny dla zalogowanych], Ma Yu W, Qian Cai Qingfu Proofreading. Ultrasonic

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