CN103675098A - Ultrasonic flaw detection method of cracks of connecting rod pin of locomotive wheel set - Google Patents
Ultrasonic flaw detection method of cracks of connecting rod pin of locomotive wheel set Download PDFInfo
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- CN103675098A CN103675098A CN201310648062.9A CN201310648062A CN103675098A CN 103675098 A CN103675098 A CN 103675098A CN 201310648062 A CN201310648062 A CN 201310648062A CN 103675098 A CN103675098 A CN 103675098A
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Abstract
The invention discloses an ultrasonic flaw detection of cracks of a locomotive wheel set connecting rod pin including a connecting rod pin with an inner hole, the detection method is as follows: a connecting rod pin special-purpose ultrasonic probe is used for flaw detection scanning of the connecting rod pin, the ultrasonic probe incident angle is 1-4 degrees, the focal length is 8mm-12mm, the wafer geometry size is 16mm<2>-100mm<2>, and the frequency is 2MHZ-5MHZ; during the ultrasonic flaw detection, a circular conical surface of an exposed part of the connecting rod pin is used as a flaw detection scanning face, and parts covered or blocked by other members are detected; in flaw detection operation, a moving track of the ultrasonic probe along the circumferential direction is 360 degrees, and the moving speed is 150mm / S; and a moving track along the axial direction is in a range of 0mm-40mm, and the moving speed is 150mm / S. According to the ultrasonic flaw detection method, flaw detection of the cracks of the locomotive wheel set connecting rod pin in an assembled state can be realized, and the ultrasonic flaw detection method not only can be used for the ultrasonic flaw detection of the connecting rod pin in the assembled state, non disintegration state and in-service online state, and can also be used for the ultrasonic flaw detection of the cracks of a single and independent connecting rod pin.
Description
Technical field
The present invention relates to a kind of UT (Ultrasonic Testing) detection method of train wheel link pin crackle, belong to nondestructive examination detection technique field.
Background technology
Train wheel link pin, in thermal treatment, machining and assembling manufacture process, due to the reason such as process means is improper, causes link pin arc surface to crack; In the process of certain type locomotive operation, accidental wheel link pin fracture accident, to locomotive, operation brings potential safety hazard.For the detection of link pin, its requirement is: magnetic powder inspection detection is carried out in link pin surface, do not allowed any crackle at present.
In link pin single-piece, independently under finished product state, to detecting position, carry out magnetic powder inspection detection, detect the crack defect on link pin surface, the generation that can stop link pin fracture accident.But at assembled state, link pin one is non-single-piece, independence for link pin, the 2nd, does not expose at detection position, non-naked eyes are visible; Therefore, it is invalid adopting magnetic powder inspection to detect, and the Detection task that for this reason solves link pin crackle is extremely urgent.In addition, magnetic powder inspection detects and also cannot realize the real-time follow-up of link pin and monitoring.
Summary of the invention
The object of the invention is to: the UT (Ultrasonic Testing) detection method that a kind of train wheel link pin crackle is provided, reach the object that crack defect nondestructive examination is detected, solve existing magnetic powder inspection detection method and cannot carry out to confined state link pin the technical matters of carrying out flaw detection, thereby can effectively solve above-mentioned problems of the prior art.
The object of the invention realizes by following technical proposals: a kind of UT (Ultrasonic Testing) detection method of train wheel link pin crackle, comprise the link pin with endoporus, and its detection method is:
The first step, using the endoporus of link pin as UT (Ultrasonic Testing) surveyed area, with the basis that edits of detecting the degree of depth, i.e. range finding edits, and in actual UT (Ultrasonic Testing) testing process, also the demarcation as work system combination property state is basic simultaneously;
Second step, starts ultrasonic unit, and with ultrasonic probe, to the link pin scanning of detecting a flaw, ultrasonic probe incident angle is that 1 °-4 °, focal length are that 8 mm-12mm, wafer physical dimension are 16 mm
2～100 mm
2, frequency is 2MHZ～5MHZ; When carrying out UT (Ultrasonic Testing) detection, take link pin circular conical surface as flaw detection scanning face; Complete when exposed when the face of cylinder that link pin is 74mm at diameter, can take link pin circular conical surface as flaw detection scanning face, the face of cylinder that the diameter of also take is 74mm is flaw detection scanning face; When carrying out flaw detection operates, ultrasonic probe along the circumferential direction motion track is 360 °, and translational speed is 150mm/S; Motion track is within the scope of 0 mm～40 mm vertically, and translational speed is 150mm/S;
The 3rd step, analyzes the testing result in ultrasonic unit.
As a kind of optimal way, before second step, adopt and have aging crack defect and artificial linear scarce link pin, as UT (Ultrasonic Testing) detection sensitivity and UT (Ultrasonic Testing) Scanning sensitivity, detect test block; First this detection test block is carried out to UT (Ultrasonic Testing) detection, draw one-time detection result.
As further preferred embodiment, in second step, keep ultrasonic probe and scanning face to keep good couple state.
Compared with prior art, beneficial effect of the present invention: by adopting UT (Ultrasonic Testing) detection method of the present invention to carry out crack detection to train wheel link pin, using method is easy, can be achieved as follows beneficial effect:
1. realizing train wheel link pin detects at the crack defect of single-piece, independent finished products state, assembled state, the state that do not disintegrate;
2. realize in-service online detection, real-time follow-up and the monitoring of train wheel link pin;
3. realize train wheel link pin surface and underbead crack defects detection, for the improvement of link pin, the raising of product quality provides reliable basis;
4. by reducing locomotive inspection and repair cost to the real-time follow-up of link pin, shorten locomotive maintenance cycle;
5. guarantee the quality of train wheel, improve reliability and the security of locomotive operation.
Accompanying drawing explanation
Fig. 1 is that the present invention is by the structural representation of the train wheel link pin of carrying out flaw detection.
Wherein: parts-1, link pin-2, No. two parts-3, UT (Ultrasonic Testing) scanning face-A, detected cracks-B.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Disclosed all features in this instructions, or the step in disclosed all methods or process, except the speciality and/or step of mutual repulsion, all can combine by any way, unless narration especially, all can be replaced by other equivalences or the alternative features with similar object,, unless narration especially, an embodiment in a series of equivalences of each feature or similar characteristics.
A UT (Ultrasonic Testing) detection method for train wheel link pin crackle, comprises the link pin with endoporus, and its detection method is:
The first step, using the endoporus of link pin as UT (Ultrasonic Testing) surveyed area, with the basis that edits of detecting the degree of depth, i.e. range finding edits, and in actual UT (Ultrasonic Testing) testing process, also the demarcation as work system combination property state is basic simultaneously;
Second step, adopts and has aging crack defect and artificial linear scarce link pin, as UT (Ultrasonic Testing) detection sensitivity and UT (Ultrasonic Testing) Scanning sensitivity, detects test block; First this detection test block is carried out to UT (Ultrasonic Testing) detection, draw one-time detection result; Then start ultrasonic unit, with ultrasonic probe, to the link pin scanning of detecting a flaw, ultrasonic probe incident angle is that 1 °-4 °, focal length are that 8 mm-12mm, wafer physical dimension are 16 mm
2～100 mm
2, frequency is 2MHZ～5MHZ; When carrying out UT (Ultrasonic Testing) detection, take link pin circular conical surface as flaw detection scanning face; Complete when exposed when the face of cylinder that link pin is 74mm at diameter, can take link pin circular conical surface as flaw detection scanning face, the face of cylinder that the diameter of also take is 74mm is flaw detection scanning face; When carrying out flaw detection operates, ultrasonic probe along the circumferential direction motion track is 360 °, and translational speed is 150mm/S; Motion track is within the scope of 0 mm～40 mm vertically, and translational speed is 150mm/S;
In second step, keep ultrasonic probe and scanning face to keep good couple state.
The 3rd step, analyzes the testing result in ultrasonic unit.
embodiment 1:
As shown in Figure 1, the endoporus that train wheel link pin 2 is 10mm with diameter, its end face is taper, its one end is stretched in parts 1, and the other end stretches in No. two parts 3, when this link pin 2 need to be done carrying out flaw detection, using link pin A face as UT (Ultrasonic Testing) scanning face, as Fig. 1, if while having crackle on the conical surface, the cylinder surface of link pin, be easy to be detected; If when detected crackle is positioned on the link pin 2 of No. two parts 3, as the B place in Fig. 1, carry out carrying out flaw detection by UT (Ultrasonic Testing) detection method of the present invention.
The course of work of ultrasonic unit is:
Electric signal--probe--ultrasound wave---part---ultrasound wave transmitting;
---probe---electric signal---ultrasound wave receives ultrasound wave in part.
The ultrasonic probe of ultrasonic unit of the present invention is the special-purpose ultrasonic probe of link pin: be a kind of reversible acoustic-electric conversion element, work hyperacoustic effect that transmits and receives in flaw detection.The defect of detectable probe below different angles and different depth, detection sensitivity is higher.
embodiment 2:
The link pin of confined state is carried out to carrying out flaw detection, and its detection method is as follows:
The first step, using the endoporus of link pin as UT (Ultrasonic Testing) surveyed area, with the basis that edits of detecting the degree of depth, i.e. range finding edits.First, adopting link pin special-purpose ultrasonic probe to be placed in detects in test block detection faces, detect respectively the reflection of ultrasound wave incidence point and involve the endoporus reflection wave that diameter is 10mm, adjust ultrasonic unit, than row, incidence point reflection to be involved to diameter be that the endoporus reflection wave of 10mm is found range and edited by certain.
Simultaneously the endoporus reflection wave of link pin is also as the demarcation foundation of work system combination property state in UT (Ultrasonic Testing) testing process;
Second step, adopts the link pin that has aging crack and artificial linear discontinuities, as UT (Ultrasonic Testing) detection sensitivity and UT (Ultrasonic Testing) Scanning sensitivity, detects test block; First this detection test block is carried out to UT (Ultrasonic Testing) detection, draw one-time detection result.
By the ultrasound wave of link pin crackle, magnetic powder inspection detection and crackle are dissected, comparative analysis, selected a link pin that has aging crack defect, and in its flawless different circumference orientation, having made the degree of depth is 0.5mm～4mm, angle of inclination is the artificial linear discontinuities of 30 °～60 °;
First, adopt the oblique incidence ultrasonic longitudinal wave probe that range finding has edited to be placed in the artificial linear fault location of detection test block 0.5mm, adjust ultrasonic unit, make its reflection wave height maximum, adjusted to again benchmark wave height (as 80% of display screen amplitude), with this definite UT (Ultrasonic Testing) sensitivity, all can detect and detect the artificial linear discontinuities of test block 0.5mm～4mm and aging crack defect, now ultrasonic unit sensitivity duration is link pin UT (Ultrasonic Testing) detection sensitivity.In actual UT (Ultrasonic Testing), detect in operation, on UT (Ultrasonic Testing) detection sensitivity basis, improve again 6dB～8dB, as UT (Ultrasonic Testing) Scanning sensitivity.As should regulate Scanning sensitivity to carrying out flaw detection sensitivity to judge while noting abnormalities.
With scanning that detected link pin is detected a flaw, when carrying out UT (Ultrasonic Testing) detection, take link pin circular conical surface as flaw detection scanning face; Complete when exposed when the face of cylinder that link pin is 74mm at diameter, can take link pin circular conical surface as flaw detection scanning face, the face of cylinder that the diameter of also take is 74mm is flaw detection scanning face; When carrying out flaw detection operates, ultrasonic probe along the circumferential direction motion track is 360 °, and translational speed is 150mm/S; Motion track is within the scope of 0 mm～43 mm vertically, and translational speed is 150mm/S; In this carrying out flaw detection process: keep ultrasonic probe and scanning face to keep good couple state.
The 3rd step, analyzes the testing result in ultrasonic unit
.
According to carrying out flaw detection sensitivity, link pin UT (Ultrasonic Testing) is detected in operation, while noting abnormalities as the scope of demarcating in range finding, should regulate Scanning sensitivity to carrying out flaw detection sensitivity to judge.
According to carrying out flaw detection sensitivity, in the scope of demarcating in range finding:
1) when reflection wave is greater than benchmark wave height, link pin is scrapped;
2) when reflection wave is less than benchmark wave height, the special-purpose ultrasonic probe of link pin should carry out multiple spy vertically along 360 ° of directions of circumference within the scope of 0mm～40mm, as checks flaw detection and all occur this ripple, should notify related personnel to process and detailed record, it is carried out to tracing and monitoring.
By detecting and disassemble checking to train wheel link pin UT (Ultrasonic Testing) is actual, the method can effectively detect the crackle of link pin.The link pin that the method is not only applicable to confined state detects, and the UT (Ultrasonic Testing) of be also applicable to not disintegrate state and in-service presence detects, also can be used for simultaneously single-piece independently the UT (Ultrasonic Testing) of link pin detect.
When link pin detection faces is cylinder, the conical surface or cylinder+conical surface, when link pin has or not endoporus, all can adopts the method to carry out, and can detect surface and the inherent vice of link pin.
The method can be applied to miscellaneous part, product can UT (Ultrasonic Testing) detect.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a UT (Ultrasonic Testing) detection method for train wheel link pin crackle, comprises the link pin with endoporus, it is characterized in that: its detection method is:
The first step, using the endoporus of link pin as UT (Ultrasonic Testing) surveyed area with detect the demarcation basis of the combination property state in basis and UT (Ultrasonic Testing) testing process that edits of the degree of depth;
Second step, starts ultrasonic unit, and with ultrasonic probe, to the link pin scanning of detecting a flaw, ultrasonic probe incident angle is that 1 °-4 °, focal length are that 8 mm-12mm, wafer physical dimension are 16 mm
2～100 mm
2, frequency is 2MHZ～5MHZ; When carrying out UT (Ultrasonic Testing) detection, take link pin circular conical surface as flaw detection scanning face; Complete when exposed when the face of cylinder that link pin is 74mm at diameter, can take link pin circular conical surface as flaw detection scanning face, the face of cylinder that the diameter of also take is 74mm is flaw detection scanning face; When carrying out flaw detection operates, ultrasonic probe along the circumferential direction motion track is 360 °, and translational speed is 150mm/S; Motion track is within the scope of 0 mm～40 mm vertically, and translational speed is 150mm/S;
The 3rd step, analyzes the testing result in ultrasonic unit.
2. the UT (Ultrasonic Testing) detection method of a kind of train wheel link pin crackle as claimed in claim 1, it is characterized in that: before second step, employing has aging crack defect and artificial linear scarce link pin, as UT (Ultrasonic Testing) detection sensitivity and UT (Ultrasonic Testing) Scanning sensitivity, detects test block; First this detection test block is carried out to UT (Ultrasonic Testing) detection, draw one-time detection result.
3. as the UT (Ultrasonic Testing) detection method of a kind of train wheel link pin crackle as described in arbitrary in claim 1 or 2, it is characterized in that: in second step, keep ultrasonic probe and scanning face to keep good couple state.
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| CN201310648062.9A CN103675098A (en) | 2013-12-06 | 2013-12-06 | Ultrasonic flaw detection method of cracks of connecting rod pin of locomotive wheel set |
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Cited By (7)
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| CN103969342A (en) * | 2014-05-26 | 2014-08-06 | 南车成都机车车辆有限公司 | Locomotive wheelset connecting rod pin crack ultrasonic probe |
| CN104155367A (en) * | 2014-08-20 | 2014-11-19 | 南车成都机车车辆有限公司 | Reference block of ultrasonic flaw detection and application method thereof |
| CN104820016A (en) * | 2015-04-15 | 2015-08-05 | 南车戚墅堰机车车辆工艺研究所有限公司 | Locomotive connecting shaft fatigue crack ultrasonic detection method |
| CN104880514A (en) * | 2015-06-19 | 2015-09-02 | 南车成都机车车辆有限公司 | Reference test block for ultrasonic flow detection and using method thereof |
| CN104950043A (en) * | 2015-06-19 | 2015-09-30 | 南车成都机车车辆有限公司 | Processing method of artificial reference block cracks for ultrasonic crack detection |
| CN106226406A (en) * | 2016-09-19 | 2016-12-14 | 中车成都机车车辆有限公司 | Ultrasonic examination detection reference block and detection method thereof |
| CN108205014A (en) * | 2017-12-29 | 2018-06-26 | 江苏共昌轧辊股份有限公司 | The ultrasonic surface detection method of minor diameter working roll for forged steel cold rolling |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103969342A (en) * | 2014-05-26 | 2014-08-06 | 南车成都机车车辆有限公司 | Locomotive wheelset connecting rod pin crack ultrasonic probe |
| CN103969342B (en) * | 2014-05-26 | 2018-04-03 | 中车成都机车车辆有限公司 | Train wheel link pin crack ultrasonic is popped one's head in |
| CN104155367A (en) * | 2014-08-20 | 2014-11-19 | 南车成都机车车辆有限公司 | Reference block of ultrasonic flaw detection and application method thereof |
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| CN104880514A (en) * | 2015-06-19 | 2015-09-02 | 南车成都机车车辆有限公司 | Reference test block for ultrasonic flow detection and using method thereof |
| CN104950043A (en) * | 2015-06-19 | 2015-09-30 | 南车成都机车车辆有限公司 | Processing method of artificial reference block cracks for ultrasonic crack detection |
| CN106226406A (en) * | 2016-09-19 | 2016-12-14 | 中车成都机车车辆有限公司 | Ultrasonic examination detection reference block and detection method thereof |
| CN108205014A (en) * | 2017-12-29 | 2018-06-26 | 江苏共昌轧辊股份有限公司 | The ultrasonic surface detection method of minor diameter working roll for forged steel cold rolling |
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Application publication date: 20140326 |