CN103575251A - Center deviation detecting method for rotary type ultrasonic flaw detection device - Google Patents
Center deviation detecting method for rotary type ultrasonic flaw detection device Download PDFInfo
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- CN103575251A CN103575251A CN201210283154.7A CN201210283154A CN103575251A CN 103575251 A CN103575251 A CN 103575251A CN 201210283154 A CN201210283154 A CN 201210283154A CN 103575251 A CN103575251 A CN 103575251A
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Abstract
The invention discloses a center deviation detecting method for a rotary type ultrasonic flaw detection device. The detecting method comprises the steps that first two sample pipes with the flatness error smaller than 0.3mm are selected, then the deviation of levelness and verticality of a flaw detection main machine and a conveying roll is detected by utilizing the sample pipes, the ovality of three clamping rolls of the flaw detection main machine is further detected, and finally the central deviation of the flaw detection main machine is detected. By means of the detecting method, the shortcoming that the direction of the mechanical central deviation of the flaw detection device and a detail value of the deviation cannot be identified in time in the past is overcome, and the central adjusting time is effectively shorted. The center deviation detecting method for the rotary type ultrasonic flaw detection device has the advantages that a test is conveniently conducted, test efficiency is high, the test can be completed by testing the flaw detection device before periodical repair, and normal flaw detection operation is not influenced.
Description
Technical field
The present invention relates to defect-detecting equipment test bias technology, more particularly, relate to a kind of rotary ultrasonic ware defect-detecting equipment center deviation detecting method.
Background technology
In steel pipe, the operation of rod iron automatic ultrasonic flaw-detecting, in order to guarantee the accuracy of flaw detection, just must guarantee that the mechanical precision of ultrasonic test equipment meets the requirement of the standards such as the GB/5777-10 ultrasonic flaw detecting of seamless steel pipe method of inspection and YB4082-08 steel pipe automatic ultrasonic flaw-detecting overall system performance method of testing.Above-mentioned standard code, per tour is started shooting rear and is detected a flaw continuously 2～4 hours, and must be by the combination property of the requirement checkout equipment of defined in above-mentioned two standards before shutdown.The indexs such as wherein flaw detection sensitivity fluctuation, circumferential poor sensitivity, signal to noise ratio (S/N ratio) must be controlled in the scope of standard code, once These parameters is defective, just must adjust plant machinery precision.Yet by the integrated performance index of above-mentioned two standard testings, all reflection is the fluctuation of ultrasonic reflections signal, the decibel dB value of regulation once reflected signal fluctuation is above standard, the mechanical precision of devices illustrated is poor, needs to adjust.And for the adjustment of plant machinery precision, key is direction and the deviate of GPRS plant machinery centre deviation, otherwise adjust, be just difficult to carry out.
So-called defect-detecting equipment machine center deviation mainly comprises level, the perpendicularity deviation of flaw detection main frame machine center deviation and front and back rollgang.Main frame machine center deviation refers to the departure degree of defect-detecting equipment rotary body center and detected steel pipe or rod iron center, and it is an important indicator of defect-detecting equipment mechanical precision.At present, defect-detecting equipment generally adopts the way of optical instrument or laser technology or the method for mechanical measurement to carry out the skew at the center of sensing equipment machinery own both at home and abroad, if adopt the method for optical instrument or laser technology not only to need a set of expensive testing tool, and measuring accuracy is also subject to the impact of accuracy of instrument own; If employing mechanical measuring means, also needs mechanical measurement equipment and the instrument of outfit, and adopt the mechanical device test adjustment time long, impact is normally produced.
At present, the method that rotary automatic ultrasonic flaw-detecting plant machinery centre deviation is measured generally has two kinds, a kind of is by professional measuring mechanism, adopt professional equipment optical instrument and laser technology to measure or mechanical measurement defect-detecting equipment machine center, both measuring accuracy are not only subject to the precision of surveying instrument own and measure pedestal factor impact such as installation deviation on equipment, and entrust measurement expense expensive at every turn, and uncontrollable in Measuring Time, have a strong impact on normal production.Another kind is that flaw detection operating personnel oneself measure, operating personnel press the method for defined in YB4082-2000 steel pipe automatic ultrasonic flaw-detecting equipment complex performance test methods standard, circumferential poor sensitivity to equipment is measured, and circumferentially poor sensitivity refers to the attenuator reading maximum of same person industrial injury instrument when the artificial wounding signal of the some points of circumferencial direction (0 °, 120 °, 240 ° three directions) has just been reported to the police, the difference of minimum value.Although the method can be by the positive correlation of the circumferential poor sensitivity of equipment and mechanical precision, the departure degree of determining apparatus machine center, but can only test out the fine or not degree at plant machinery center, can not accurately test out the offset direction of machine center and depart from numerical value.Therefore still cannot provide for overhaul of the equipments personnel the data such as the adjustment direction of machine center and concrete adjustment amount
In order to grasp in time fast the situation of change of defect-detecting equipment machine center deviation data and rollgang precision, guarantee the accuracy of result of detection, in the urgent need to a kind of new rotary ultrasonic ware defect-detecting equipment center deviation detecting method, to meet, produce and quality inspection demand.
Summary of the invention
For the above-mentioned shortcoming existing in prior art, the object of this invention is to provide a kind of rotary ultrasonic ware defect-detecting equipment center deviation detecting method, can judge fast the offset direction at device Host machine center and rollgang center and the concrete amount of deflection departing from.
For achieving the above object, the present invention adopts following technical scheme:
This rotary ultrasonic ware defect-detecting equipment center deviation detecting method, comprises the following steps:
A. select the sample pipe that two flatness errors are less than 0.3mm;
B. adopt sample pipe to detect the deviation of flaw detection main frame and rollgang levelness and verticality;
C. adopt sample pipe to detect the ovality of flaw detection main frame three roller pinch rolls;
D. adopt sample pipe to detect the centre deviation of flaw detection main frame.
In steps A, described sample pipe is selected and need be measured flatness to the two ends of every sample pipe and 3 of centres, and writes down the measurement point of every sample pipe diameter run-out minimum.
In step B, concrete deviation detecting step is as follows:
B1. equally pipe is placed in main frame, and another sample pipe is placed in and inputs or outputs on roller-way, and makes the end docking that different pipe is relative;
B2. mobile different pipe, make its joint respectively off-position in top between pinch roll and input, outlet roller, adjacent input or output between roller above;
B3. adopt ruler and clearance gauge to carry out upper and lower, left and right deviation to the difference pipe joint on each off-position and measure, to record the departure of flaw detection main frame and rollgang levelness, verticality.
In step C, concrete ovality detecting step is as follows:
C1. choose the ultrasonic wave thickness measuring probe on 12 o'clock of main frame rotary body inwall or 3 o ' clock positions, and will be equally pipe be placed in roller-way and clamped by three roller pinch rolls;
C2. in the situation that rotary body does not rotate, sample pipe is moved ahead through oppositely carrying again after rotary body certain distance, and the distance of single-way moving is not less than the circular radial girth of pinch roll;
C3. by this Thicknesser probe, record oscillogram, and the ripple of measuring in the corresponding time period according to oscillogram rocks scope, require the ripple scope of rocking should be within 0.3mm.
In step D, concrete centre deviation detecting step is as follows:
D1. choose the Thicknesser probe on main frame rotary body inwall 2,6,9 or 12 o ' clock positions, and using this position as initial zero-bit;
D2. equally pipe is sent in main frame, and clamps by corresponding pinch roll;
D3. make rotary body High Rotation Speed and pass into coupled water, by the time, after coupled water stability of flow, rotary body being stopped;
D4. with hand, stir rotary body, Thicknesser probe is measured equipotential initial zero-bit and another three respectively, and rocked according to corresponding ripple shown in the oscillogram recording the centre deviation that scope calculates respectively main frame afterbody, middle part and head.
In technique scheme, rotary ultrasonic ware defect-detecting equipment center deviation detecting method of the present invention is first selected the sample pipe that two flatness errors are less than 0.3mm, then adopt sample pipe to detect the deviation of flaw detection main frame and rollgang levelness and verticality, again the ovality of flaw detection main frame three roller pinch rolls is detected, finally the centre deviation of flaw detection main frame is detected.By this detection method, changed and cannot pick out in time the defect of the direction of defect-detecting equipment machine center deviation and the concrete numerical value of deviation in the past, effectively shortened center and adjust the time, and there is convenient test, testing efficiency is high, each test only need be tested and just can complete before equipment periodical repair, to advantages such as normal flaw detection operation are unaffected.
Accompanying drawing explanation
Fig. 1 is the main flow chart of center deviation detecting method of the present invention;
Fig. 2 is the instrumentation plan of sample pipe flatness of the present invention;
Fig. 3 a～Fig. 3 c is respectively that the present invention measures the deviation of main frame and rollgang at three diverse location joints;
Fig. 4 is pinch roll ellipticity measurement schematic diagram of the present invention;
Waveform schematic diagram when Fig. 5 is ellipticity measurement of the present invention.
Embodiment
Below in conjunction with drawings and Examples, further illustrate technical scheme of the present invention.
Refer to shown in Fig. 1, rotary ultrasonic ware defect-detecting equipment center deviation detecting method of the present invention mainly comprises the following steps: A. selects the sample pipe that two flatness errors are less than 0.3mm; B. adopt sample pipe to detect the deviation of flaw detection main frame and rollgang levelness and verticality; C. adopt sample pipe to detect the ovality of flaw detection main frame three roller pinch rolls; D. adopt sample pipe to detect the centre deviation of flaw detection main frame.
Wherein, first need to select two for the sample pipe of roller-way levelness, verticality and flaw detection host center test bias, this sample pipe should guarantee that its flatness error is less than 0.3mm.When selecting sample pipe, measure the flatness of every sample pipe, need to survey 3 points, write down one end of every pipe diameter run-out minimum.As shown in Figure 2, measure and first sample pipe 1 is placed on V-type bracing frame 2, and measurement dial gauge 3 is placed in to tube head measurement point position, rotation sample pipe is measured the error of sample pipe 1 tube head flatness for 1 one weeks, then measurement dial gauge 3 is placed in to sample pipe 1 middle measurement point position, same rotation sample pipe is measured sample pipe 1 body flatness error for 1 one weeks, finally measurement dial gauge 3 is placed in to pipe tail measurement point position, rotation sample pipe is measured sample pipe 1 pipe tail flatness error for 1 one weeks, and sample pipe 1 total length of testing should guarantee that its flatness maximum error is less than 0.3mm.
Then, to equally manage 1 is placed in main frame (7 in Fig. 3 a is main frame rotary body) by position shown in Fig. 3 a, and making its right-hand member take right side the first pinch roll 41 is starting point, another root is placed in approach table, its left end be take the first roller 51 of approach table and is connected as starting point and with the former right-hand member, by observing the docking situation of two sample pipe 1 joints, with ruler and clearance gauge, measure the upper and lower of sample pipe 1 docking site, left and right departure (levelness and verticality), and measurement result is recorded in test recording table.Again two pipes are being moved to right by Fig. 3 b, make joint move to the top between first, second roller 41,42 of approach table, carry out again same measured deviation, until each roller flatness measurement of all approach tables is complete, and then two pipes are moved to left by Fig. 3 c to (42 in Fig. 3 c is main frame left side the first pinch roll, 61 is the first roller of runout table), thus successively the levelness of each roller of runout table and verticality are measured, and measurement result is recorded in test recording table one by one.
Refer to shown in Fig. 4, Fig. 5, then choose the ultrasonic wave thickness measuring probe 8 on 7 12 o'clock of inwall of main frame rotary body or 3 o ' clock positions, and will equally manage 1 and be placed in roller-way and clamped by three roller pinch rolls; In the situation that rotary body 7 does not rotate, sample pipe is moved ahead through oppositely carrying again after rotary body 7 certain distances, and the distance of single-way moving is not less than the circular radial girth (being pinch roll diameter * л) of pinch roll; By this Thicknesser probe 8, record oscillogram, and the ripple of measuring in the corresponding time period according to oscillogram rocks scope, require the ripple scope of rocking should be within 0.3mm.In Fig. 5, the scope that the ripple of t1 time period boundary wave display position and t2 time period boundary wave display position rocks (being maximal value and the how many μ S of minimum value difference of ultrasonic propagation time), require to rock distance at 0.3mm with interior (1 μ S is equivalent to 0.375mm).Therefore, t1 time period boundary wave display position in Fig. 5 is 4.5 μ S, t2 time period boundary wave display position is 5.2 μ S, t2-t1=5.2-4.5=0.7 μ S, so boundary wave rock distance be that 0.7 μ S * 0.375mm/ μ S equals 0.26mm, be less than standard 0.3, this defect-detecting equipment pinch roll ovality test result meets standard-required.
Finally, by operating personnel at optional 1 Thicknesser probe of a rotating body, and probe is placed in to upper and lower (short transverse) or left and right (horizontal direction) arbitrary position, as initial zero-bit position, and by this position artificial be defined as initial zero-bit (0 ° of position), by defect-detecting equipment rollgang, sample pipe is sent in main frame, first make two, the right side pinch roll of rotary body clamp sample pipe, carry out Test Host afterbody centre deviation, control rotary body High Rotation Speed and pass into coupled water, by the time after coupled water stability of flow, rotary body and probe are stopped, then with hand, stir the Thicknesser probe in rotary body, first make probe detect when 180 ° of positions of initial zero-bit (0 ° of position) and correspondence, the oscillogram that same observation station gathers, in oscillogram, record the corresponding reading of these two position boundary waves on time shaft, during as 0 °, be 37.1 μ S, in the time of 180 °, be 36.0 μ S, thereby (vertically) deviation of probe is that 37.1 μ S-36.0 μ S equal 1.1 μ S.Measuring sonde (level) deviation in the time of 90 ° of correspondence and 270 ° of positions equally again, record the corresponding reading of these two position boundary waves on time shaft, such as: in the time of 90 °, be 36.1 μ S, be 38.5 μ S 270 ° time, confirm that probe (level) deviation is that 38.5 μ S-36.1 μ S equal 2.4 μ S.
By computing formula, can calculate: center deviation difference δ=1500 * (t1-t2)/4 * 1000(mm), and according to ± number judge bias direction, test data is recorded in record sheet.
In formula: 1500---the velocity of sound (m/s) in water.
T1---0 ° (on) or 90 ° of (left side) positions by UT (Ultrasonic Testing) instrument, read t1 time period boundary wave that Thicknesser probe records at the upper setting value of display instrument time shaft (μ s).
T2---180 ° (under) or 270 ° of (right side) positions by UT (Ultrasonic Testing) instrument, read t2 time period boundary wave that Thicknesser probe records at the upper setting value of display instrument time shaft (μ s).
For example: above-mentioned upper and lower deviation (t1-t2) is 1.1 μ S, left and right deviation (t1-t2) is 2.4 μ S, by above-mentioned data substitution computing formula, the upper and lower deviation of main frame afterbody that can obtain detecting a flaw is δ=1500 * 1.1/4 * 1000(mm)=0.41mm, during 0 ° of upper and lower offset direction, be 37.1 μ S, in the time of 180 °, be 36.0 μ S, because time shaft data are up big and down small, therefore can judge the upwards skew of defect-detecting equipment center; By left and right deviation (t1-t2), be 2.4 μ S data substitution computing formula simultaneously, the left and right deviation of main frame afterbody that can obtain detecting a flaw is δ=1500 * 2.4/4 * 1000(mm)=0.9mm, during left 90 ° of left and right offset direction, be 36.1 μ S, be 38.5 μ S right 270 ° time, because time shaft data are left little, right large, therefore can judge that defect-detecting equipment center is offset to the right; When defect-detecting equipment center is adjusted, as long as it is just passable that equipment is adjusted to corresponding numerical value by off-centring reverse direction.
In like manner, each pinch roll of inner side by sample pipe by main frame both sides clamps, and can record direction and the numerical value of main frame middle part centre deviation, and sample pipe is clamped by two pinch rolls in main frame left side, can record direction and the numerical value of main frame head centre deviation.
In sum, center deviation detecting method of the present invention is for rotary automatic ultrasonic flaw-detecting plant machinery precision measure difficulty, host center deviation and rollgang flatness bias direction cannot judge and deviate data are difficult obtains, be unfavorable for overhaul of the equipments, and a kind of defect-detecting equipment mechanical precision method of testing of invention, the method is that the standard sample pipe by adopting two diameter run-outs to be less than 0.3mm is respectively organized the pipe docking situation between roller-way in Test Host both sides successively, observe rollgang departure up and down, guarantee to detect a flaw main frame and input, the levelness of runout table and verticality keep coincideing.And the test of main frame machine center deviation is to send a sample pipe to send in UT (Ultrasonic Testing) main frame, utilize the Thicknesser probe in rotary body to carry out DATA REASONING, by observe Thicknesser probe to the boundary wave position of sample tube-surface reflected signal in the week position deviation of generation upwards, be that ultrasound wave is under identical velocity of propagation, the variation of propagation distance, this characteristic of variation that can cause the travel-time, effectively obtain the variation of propagation distance between ultrasonic probe and steel pipe and cause the time deviation value that the travel-time changes, utilize the deviate on this travel-time to pass through series of computation, can obtain main frame machine center deviate more intuitively.Therefore, application of the present invention not only can improve flaw detection quality can improve again flaw detection service work efficiency, compared with prior art, has more that flaw detection efficiency is high, test adjusting operation is convenient, the advantage of environmental protection;
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the present invention is described, and be not used as limitation of the invention, as long as within the scope of connotation of the present invention, to the variation of the above embodiment, modification, all will drop within the scope of claims of the present invention.
Claims (5)
1. a rotary ultrasonic ware defect-detecting equipment center deviation detecting method, is characterized in that, comprises the following steps:
A. select the sample pipe that two flatness errors are less than 0.3mm;
B. adopt sample pipe to detect the deviation of flaw detection main frame and rollgang levelness and verticality;
C. adopt sample pipe to detect the ovality of flaw detection main frame three roller pinch rolls;
D. adopt sample pipe to detect the centre deviation of flaw detection main frame.
2. rotary ultrasonic ware defect-detecting equipment center deviation detecting method as claimed in claim 1, is characterized in that:
In steps A, described sample pipe is selected and need be measured flatness to the two ends of every sample pipe and 3 of centres, and writes down the measurement point of every sample pipe diameter run-out minimum.
3. rotary ultrasonic ware defect-detecting equipment center deviation detecting method as claimed in claim 1, is characterized in that:
In step B, concrete deviation detecting step is as follows:
B1. equally pipe is placed in main frame, and another sample pipe is placed in and inputs or outputs on roller-way, and makes the end docking that different pipe is relative;
B2. mobile different pipe, make its joint respectively off-position in top between pinch roll and input, outlet roller, adjacent input or output between roller above;
B3. adopt ruler and clearance gauge to carry out upper and lower, left and right deviation to the difference pipe joint on each off-position and measure, to record the departure of flaw detection main frame and rollgang levelness, verticality.
4. rotary ultrasonic ware defect-detecting equipment center deviation detecting method as claimed in claim 1, is characterized in that:
In step C, concrete ovality detecting step is as follows:
C1. choose the ultrasonic wave thickness measuring probe on 12 o'clock of main frame rotary body inwall or 3 o ' clock positions, and will be equally pipe be placed in roller-way and clamped by three roller pinch rolls;
C2. in the situation that rotary body does not rotate, sample pipe is moved ahead through oppositely carrying again after rotary body certain distance, and the distance of single-way moving is not less than the circular radial girth of pinch roll;
C3. by this Thicknesser probe, record oscillogram, and the ripple of measuring in the corresponding time period according to oscillogram rocks scope, require the ripple scope of rocking should be within 0.3mm.
5. rotary ultrasonic ware defect-detecting equipment center deviation detecting method as claimed in claim 1, is characterized in that:
In step D, concrete centre deviation detecting step is as follows:
D1. choose the Thicknesser probe on main frame rotary body inwall 2,6,9 or 12 o ' clock positions, and using this position as initial zero-bit;
D2. equally pipe is sent in main frame, and clamps by corresponding pinch roll;
D3. make rotary body High Rotation Speed and pass into coupled water, by the time, after coupled water stability of flow, rotary body being stopped;
D4. with hand, stir rotary body, Thicknesser probe is measured equipotential initial zero-bit and another three respectively, and rocked according to corresponding ripple shown in the oscillogram recording the centre deviation that scope calculates respectively main frame afterbody, middle part and head.
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| CN109507286A (en) * | 2018-10-30 | 2019-03-22 | 中冶京诚工程技术有限公司 | Ultrasonic flaw detection line steel pipe head-tail non-impact collision control method and device |
| CN111442749A (en) * | 2020-04-13 | 2020-07-24 | 石家庄钢铁有限责任公司 | Water immersion ultrasonic online bending measurement method |
| CN112526002A (en) * | 2020-11-13 | 2021-03-19 | 宝钢特钢韶关有限公司 | Device for correcting coaxiality of rotary ultrasonic detection equipment and round bar and using method thereof |
| CN113960179A (en) * | 2021-10-14 | 2022-01-21 | 南京钢铁股份有限公司 | Method for adjusting center of ultrasonic flaw detection equipment in water layer mode |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507286A (en) * | 2018-10-30 | 2019-03-22 | 中冶京诚工程技术有限公司 | Ultrasonic flaw detection line steel pipe head-tail non-impact collision control method and device |
| CN109507286B (en) * | 2018-10-30 | 2021-05-11 | 中冶京诚工程技术有限公司 | Ultrasonic flaw detection line steel pipe head-tail non-impact collision control method and device |
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| CN111442749B (en) * | 2020-04-13 | 2022-05-03 | 石家庄钢铁有限责任公司 | Water immersion ultrasonic online bending measurement method |
| CN112526002A (en) * | 2020-11-13 | 2021-03-19 | 宝钢特钢韶关有限公司 | Device for correcting coaxiality of rotary ultrasonic detection equipment and round bar and using method thereof |
| CN112526002B (en) * | 2020-11-13 | 2024-03-26 | 宝武杰富意特殊钢有限公司 | Correction device for coaxiality of rotary ultrasonic detection equipment and round bar and use method thereof |
| CN113960179A (en) * | 2021-10-14 | 2022-01-21 | 南京钢铁股份有限公司 | Method for adjusting center of ultrasonic flaw detection equipment in water layer mode |
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