CN105486725A - Detection system for conductivity values of pre-stretched aluminum alloy plates and using method thereof - Google Patents
Detection system for conductivity values of pre-stretched aluminum alloy plates and using method thereof Download PDFInfo
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Abstract
The invention discloses a detection system for conductivity values of pre-stretched aluminum alloy plates and a using method thereof. The detection system comprises a support, the middle of the support is provided with a conveying roller way used for transporting the pre-stretched aluminum alloy plates, and the middle of the support is further provided with a working test block set which is horizontally parallel to the conveying roller way; the portion, over the conveying roller way, of the support is provided with an upper sliding block, the portion, under the conveying roller way, of the support is provided with a lower sliding block, the upper sliding block is connected with an upper-position probe support, the bottom end face of the upper-position probe support is provided with an upper-position eddy current conductivity probe, the lower sliding block is connected with a lower-position probe support, and the upper end face of the lower-position probe support is provided with a lower-position eddy current conductivity probe; the upper-position eddy current conductivity probe is connected with an upper-position eddy current conductivity meter, and the lower-position eddy current conductivity probe is connected with a lower-position eddy current conductivity meter. According to the detection system, conductivity data of a large number of the plates can be collected, and a distribution diagram of the conductivity values of the upper surfaces and the lower surfaces of the whole plates can be automatically generated; the using method is flexible, and the accuracy of the data read by the conductivity meters is high.
Description
Technical field
The present invention relates to aluminium alloy detection technique, especially relate to detection system and the using method thereof of aluminum alloy pretensioning plate conductivity value.
Background technology
Solution hardening process is the important procedure of aviation aluminum alloy pre-stretching plate.At present, roller-bottom type glowing furnace is used to carry out to aerolite milled sheet the first-selection that solution hardening process is domestic and international aluminum alloy rolling goods manufacturer.But solution hardening operation is bad will cause catastrophic consequence.Such as, some spray nozzle clogging of roller-bottom type glowing furnace quench zone will cause some region of aluminum alloy pretensioning plate under hardening.Region under hardening can not make hardening constituent fully be solidly soluted in alloy matrix aluminum in quenching process.This hardness causing these regions under hardening to obtain after Ageing Treatment, lower than the sufficient region of quenching, is called " soft spots ".In order to ensure the aerolite pre-stretching plate providing high evenly final performance to user, a kind of detection technique detecting aluminum alloy pretensioning plate soft spots is badly in need of in aerolite manufacturing enterprise.
Aircraft industry accreditation uses Eddy Conductivity method to detect can the alloy state of heat-treatable aluminum alloy.And the hardness number of aluminium alloy establishes close relationship with conductivity value.Therefore, it is very reliable for using Eddy Conductivity method detection aluminum alloy pretensioning plate whether to there is soft spots.
Use be loaded with exchange current probe close to aluminum alloy surface time, due to the effect of coil alternating magnetic field, go out swirl shape electric current in aluminum alloy surface and nearly surface induction.The magnetic field that eddy current in aluminium alloy produces again oneself reacts on coil, and the large I of this retroaction characterizes the conductivity value on aluminum alloy surface and nearly surface effectively.
Typically use portable electric conductance Eddy current detector in existing technical scheme on aluminum alloy pretensioning plate, get a measurement conductivity value.Specific requirement is: laterally at interval of 100mm on monoblock sheet material, longitudinal direction is measured the conductivity value of a point every 600mm, recorded by the conductivity value of monoblock sheet material.The conductivity maximal value of monolithic aluminum alloy pretensioning plate and the difference of minimum value should be less than 1.5%IACS.This Eddy Conductivity detection method needs operator to be entirely placed on by probe plane on detected plate surface, and during measurement, detecting head surface must contact completely with detected plate surface.The shortcoming of this method is after (1) measures the conductivity values of monoblock aluminum alloy pretensioning plate, also needs to spend a lot of time the conductivity value distribution situation could understanding monoblock sheet material after processing data; (2) operating process at substantial manpower and time, and accuracy of detection affects by the skill level of operating personnel and absorbed degree; (3) be difficult to realize measuring the lower surface of sheet material.Roller-bottom type glowing furnace is the preferred unit of current aviation alloyed aluminium plate solution hardening process; When using roller-bottom type glowing furnace to quench to aluminium sheet, be positioned at upper and lower two the surperficial nozzles of sheet material and to the upper and lower surface of sheet material water spray water under high pressure, sheet material cooled simultaneously; Nozzle failures may occur in the nozzle being positioned at sheet material upper surface, also may occur in the nozzle being positioned at sheet material lower surface.Therefore, upper and lower two surperficial quenching uniformity of aluminium alloy plate all must use conductivity method inspection.Use and manually get the quenching situation that point type conductivity detection method detects aluminum alloy plate materials lower surface, then need to detect unsettled for aluminium alloy plate; Under this working environment, not only can affect detection accuracy, and bring potential safety hazard.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of detection system and using method thereof of aluminum alloy pretensioning plate conductivity value, the measuring system that the present invention adopts can gather the conductivity data of a large amount of sheet material, work efficiency is high, reduce potential safety hazard, and automatically can generate the conductivity value distribution collection of illustrative plates of monoblock sheet material upper surface, lower surface, time saving and energy saving.
The technical solution used in the present invention is as follows for achieving the above object:
A detection system for aluminum alloy pretensioning plate conductivity value, comprises support, it is characterized in that, is provided with the rollgang transporting aluminum alloy pretensioning plate in the middle of described support, is also provided with work test block group in the middle of support, and with rollgang horizontal parallel; Support above rollgang is provided with sliding shoe, support below rollgang is provided with downslide motion block, upper sliding shoe connects upper probe bearing, the bottom face of upper probe bearing is provided with upper eddy conductivity probe, downslide motion block connects the next probe bearing, and the upper surface of the next probe bearing is provided with the next eddy conductivity probe; Described upper eddy conductivity probe is connected with upper eddy current conduc, and the next eddy conductivity probe is connected with the next eddy current conduc.
Principle of work of the present invention is: after opening regulator cubicle, after upper eddy conductivity probe, the next eddy conductivity probe are first calibrated with work test block group, move to the upper and lower surface of aluminum alloy pretensioning plate to aluminum alloy pretensioning plate, then by popping one's head in upper eddy conductivity, the pop one's head in upper eddy current conduc that is connected respectively and the next eddy current conduc of the next eddy conductivity carry out conductivity detection to aluminum alloy pretensioning plate.
In the present invention, illustrate further, described upper probe bearing is provided with buphthalmos multi-directional ball, and buphthalmos multi-directional ball and upper eddy conductivity are popped one's head in and be arranged on same end face; The next probe bearing is provided with buphthalmos multi-directional ball, and buphthalmos multi-directional ball and the next eddy conductivity are popped one's head in and be arranged on same end face.Compared with prior art, setting is provided with buphthalmos multi-directional ball, can not only prevent that upper eddy conductivity from popping one's head in, the next eddy conductivity probe because with aluminum alloy pretensioning plate hypotelorism and damaged, and can also can proceed mobile after aluminum alloy pretensioning plate contacts buphthalmos multi-directional ball in the rolling of buphthalmos multi-directional ball.
In the present invention, illustrate further, described support is portal frame; One end of support is also provided with regulator cubicle; Described upper sliding shoe comprises Bit Track and the upper telescopic machine mechanical arm with upper Orbit Matching; Described downslide motion block comprises lower Bit Track and the next telescopic machine mechanical arm with the next Orbit Matching; Described upper flexible mechanical arm tail end is provided with upper probe bearing, and the described bottom mechanical arm tail end that stretches is provided with the next probe bearing; Described regulator cubicle is also provided with man-machine interface; Regulator cubicle two ends are connected with upper eddy current conduc, the next eddy current conduc respectively by upper crawler type cable, the next crawler type cable.By above-mentioned arranging, structure can better realize upper eddy conductivity probe, the next eddy conductivity probe can be mobile on the upper and lower surface of aluminum alloy pretensioning plate; And can control more easily by being also provided with man-machine interface on regulator cubicle and relevant order is set.
In the present invention, illustrate further, the porch of described portal frame is also provided with laser sensor and rotary encoder, corresponding connection regulator cubicle.Adopt and install laser sensor in the porch of portal frame, detection aluminium sheet enters surveyed area and leaves the time point of surveyed area.Adopt, in the porch of portal frame, rotary encoder is installed, measure the displacement of aluminum alloy pretensioning plate longitudinal direction.
In the present invention, illustrate further, described upper eddy conductivity probe, the next eddy conductivity probe are pulsed eddy current probe.Adopt this kind of probe can increase the precision detected, reduce error.
In the present invention, illustrate further, the frequency of described pulsed eddy current probe is 50kHz-100kHz.
In the present invention, illustrate further, described upper eddy conductivity probe and the next eddy conductivity probe are 0.25mm-1.5mm with the distance on aluminum alloy pretensioning plate surface.Can avoid directly contacting with aluminum alloy pretensioning plate, prevent from damaging upper eddy conductivity probe, the next eddy conductivity probe.
In the present invention, illustrate further, described work test block group is made up of the test block of 2-4 block conductivity; When selecting 2 pieces of conductivity test blocks, the conductivity values of the 1st piece is 29.0 ± 5.0%IACS; The conductivity values of the 2nd piece is 42.0 ± 5.0%IACS; When selecting 3 pieces of conductivity test blocks, the conductivity values of the 1st piece is 16.0 ± 5.0%IACS; The conductivity values of the 2nd piece is 29.0 ± 5.0%IACS; The conductivity values of the 3rd piece is 42.0 ± 5.0%IACS; When selecting 4 pieces of conductivity test blocks, the conductivity values of the 1st piece is 16.0 ± 5.0%IACS; The conductivity values of the 2nd piece is 29.0 ± 5.0%IACS; The conductivity values of the 3rd piece is 42.0 ± 5.0%IACS; The conductivity values of the 4th piece is 60.0 ± 5.0%IACS.The object arranging work test block group is demarcated equipment timing, to guarantee the accuracy of the conductivity value read from detection system; Select 2 pieces of conductivity test block composition work test block groups can meet the primary demand using system of the present invention to complete conductivity detection; Detect the sensing range of numerical value as conductivity need be expanded, can select flexibly to add more conductivity test block composition work test block group.
In the present invention, illustrate further, also comprise the laboratory test block group for calibration operation test block group; Described laboratory test block group is made up of 6 pieces of conductivity test blocks; The conductivity values of the 1st piece is 6.7 ± 2.0%IACS; The conductivity values of the 2nd piece is 18.2 ± 2.0%IACS; The conductivity values of the 2nd piece is 25.7 ± 2.0%IACS; The conductivity values of the 3rd piece is 37.4 ± 2.0%IACS; The conductivity values of the 4th piece is 44.7 ± 2.0%IACS; The conductivity values of the 5th piece is 59.0 ± 2%IACS; The conductivity values of the 6th piece is 42 ± 2%IACS.Under work test block group is in factory's operating mode, conductivity value may change in time, and in order to ensure the accuracy that conductivity detects, regularly use the effect of laboratory test block group to be calibrate work test block group, alignment time interval is less than 120 days; The method of calibration be calibration operation test block group and laboratory test block group are left standstill with same temperature environment under at least 3 hours, then use test block group in laboratory to demarcate upper eddy conductivity probe and upper eddy current conduc; Now, upper eddy conductivity probe is moved to the upper surface of first piece of test block of work test block group, the conductivity values of reading to be marked in this block test block and to write the calibration date, the upper surface of other test blocks is calibrated according to the method, after the conductivity value calibration of all test block upper surfaces of test block group of finishing the work, the next eddy conductivity probe is used to repeat above-mentioned calibration steps with the next eddy current conduc to the lower surface of all test blocks of work test block group.
A using method for the detection system of aluminum alloy pretensioning plate conductivity value, comprises following concrete steps:
The first step, sets up lift-off-temperature and suppresses database;
Second step, inputs the physical dimension of aluminum alloy pre-stretching plate, alloy designations, alloy state and conductivity in a device and checks and accepts bound information;
3rd step, according to scene temperature, arrange system temperature to compensate, scene temperature is 5 DEG C-40 DEG C, when carrying out system calibration, temperature is 20 DEG C ± 1 DEG C, when scene temperature and base measuring temperature variant time start-up temperature compensation program compensate, temperature compensation program allows instrument and work test block group leave standstill more than 30 minutes in the space of temperature constant, then use the conductivity values in conductivity meter read work test block group, obtain penalty coefficient;
4th step, demarcates without the region of conductive materials near upper eddy conductivity probe and the next eddy conductivity probe being moved to;
5th step, moves to the enterprising rower of work test block group by upper eddy conductivity probe and the next eddy conductivity probe fixed;
6th step, pops one's head in upper eddy conductivity probe and the next eddy conductivity and moves to aluminum alloy pretensioning plate, carries out continuous grid type scanning to the upper surface of aluminum alloy pretensioning plate, lower surface; The object of described grid type scanning gathers sheet material conductivity value transversely, and concrete grammar is the transverse direction at grid, gathers a conductivity data point at interval of 5mm-100mm; In the longitudinal direction of grid, gather the horizontal conductivity data point of a row at interval of 20mm-600mm, stop in longitudinal movement gathering conductivity data point; Described transverse direction be by popping one's head in the upper eddy conductivity that upper Bit Track and lower Bit Track mate respectively, the next eddy conductivity pops one's head in and moves forward into line scanning; Described longitudinal direction moves along the longitudinal for being supported by rollgang and ordered about aluminum alloy pretensioning plate; Once need demarcate in work test block group every 15 minutes in the process of described grid type scanning.
compared with prior art, the beneficial effect had is in the present invention:
1, a kind of continous way of disclosure of the invention measures system and the using method thereof of aluminum alloy pretensioning plate conductivity value.The present invention is when measuring the conductivity value of aluminum alloy pretensioning plate, upper and lower eddy conductivity is popped one's head in all the time and is kept the distance of 0.25mm ~ 1.50mm between aluminum alloy pretensioning plate, thus to ensure in Aulomatizeted Detect process that upper and lower eddy conductivity probe does not produce with plate surface and rub, prevent from damaging that upper eddy conductivity is popped one's head in, the next eddy conductivity is popped one's head in.
2, the measuring system that the present invention adopts can gather the conductivity data of a large amount of aluminum alloy pretensioning plate, work efficiency is high, reduce potential safety hazard, detection system of the present invention automatically can complete upper and lower two the surperficial conductivity of aluminum alloy pretensioning plate and detects and automatically record testing result, and generate upper and lower two the surperficial conductivity scanning spectras of detected aluminum alloy pretensioning plate, time saving and energy saving; Technician can understand by conductivity scanning spectra the conductivity values distribution situation that monoblock is detected aluminum alloy pretensioning plate intuitively.
3, the present invention adopts and is all provided with buphthalmos multi-directional ball at upper probe bearing and the next probe bearing, can not only prevent that upper eddy conductivity from popping one's head in, the next eddy conductivity probe because with aluminum alloy pretensioning plate hypotelorism and damaged, and can also can proceed mobile after aluminum alloy pretensioning plate contacts buphthalmos multi-directional ball in the rolling of buphthalmos multi-directional ball, ensure that detection system proceeds the testing of conductivity.
4, the using method of detection system of the present invention is flexible, simple to operate, understandable, and can take temperature compensation by foundation need of work, timing is fixed to the enterprising rower of work test block group, thus improves the data precision of conductivity meter reading.
Accompanying drawing explanation
Fig. 1 is the front view of detection system of the present invention;
Fig. 2 is the right view of detection system of the present invention;
Fig. 3 is the partial schematic diagram of detection system of the present invention;
Fig. 4 is the close-up schematic view of detection system of the present invention;
Reference numeral is: portal frame 1, upper Bit Track 2, lower Bit Track 3, upper telescopic machine mechanical arm 4, the next telescopic machine mechanical arm 5, upper probe bearing 6, the next probe bearing 7, buphthalmos multi-directional ball 8, upper eddy conductivity probe 9, the next eddy conductivity probe 10, regulator cubicle 11, man-machine interface 12, aluminum alloy pretensioning plate 13, rollgang 14, work test block group 15, laser sensor 16, rotary encoder 17, upper crawler type cable 18, the next crawler type cable 19, upper eddy current conduc 20, the next eddy current conduc 21, laboratory test block group 22.
Embodiment
Below by way of specific embodiment, the invention will be further described.The present invention is not limited to following embodiment.
embodiment 1:
A kind of detection system of aluminum alloy pretensioning plate conductivity value, comprise portal frame 1, aluminum alloy pretensioning plate 13 and rollgang 14, rollgang 14 moves along the longitudinal for supporting and ordering about aluminum alloy pretensioning plate 13, and portal frame 1 is provided with the upper telescopic machine mechanical arm 4 of mating with upper Bit Track 2 and mates the next telescopic machine mechanical arm 5 with lower Bit Track 3; Upper telescopic machine mechanical arm 4 end is provided with upper probe bearing 6, and the bottom face of upper probe bearing 6 is provided with buphthalmos multi-directional ball 8 and upper eddy conductivity probe 9; Upper probe bearing 6 is provided with buphthalmos multi-directional ball 8, and buphthalmos multi-directional ball 8 and upper eddy conductivity are popped one's head in and 9 be arranged on same end face; Upper eddy conductivity probe 9, the next eddy conductivity probe 10 are pulsed eddy current probe; The frequency of pulsed eddy current probe is 50kHz, and upper eddy conductivity probe 9 and the next eddy conductivity probe 10 are 0.25mm with the distance on aluminum alloy pretensioning plate 13 surface; The next telescopic machine mechanical arm 5 end is provided with the next probe bearing 7, and the upper surface of the next probe bearing 7 is provided with buphthalmos multi-directional ball 8 and the next eddy conductivity probe 10; The next probe bearing 7 is provided with buphthalmos multi-directional ball 8, and buphthalmos multi-directional ball 8 and the next eddy conductivity are popped one's head in and 10 be arranged on same end face; The side of portal frame 1 is provided with regulator cubicle 11, and regulator cubicle 11 is provided with man-machine interface 12; In the middle of portal frame 1, the work test block group 15 be made up of 2 pieces of conductivity test blocks is also installed; Regulator cubicle 11 two ends are connected with upper eddy current conduc 20, the next eddy current conduc 21 respectively by upper crawler type cable 18, the next crawler type cable 19; The porch of portal frame 1 is provided with laser sensor 16 and rotary encoder 17; Also comprise the laboratory test block group 22 be made up of 6 pieces of conductivity test blocks for calibration operation test block group 15.
Principle of work of the present invention is: after opening regulator cubicle 11, after upper eddy conductivity probe 9, the next eddy conductivity probe 10 are first calibrated with work test block group 15, move to the upper and lower surface of aluminum alloy pretensioning plate 13 to aluminum alloy pretensioning plate 13, then by popping one's head in 9 with upper eddy conductivity, the next eddy conductivity pops one's head in the 10 upper eddy current conducs 20 be connected respectively and the next eddy current conduc 21 pairs of aluminum alloy pretensioning plates 13 carry out conductivity detection.
A using method for the detection system of aluminum alloy pretensioning plate conductivity value, comprises following concrete steps:
The first step, sets up lift-off-temperature and suppresses database;
Second step, inputs the physical dimension of aluminum alloy pre-stretching plate, alloy designations, alloy state and conductivity in a device and checks and accepts bound information;
3rd step, according to scene temperature, arrange system temperature to compensate, scene temperature is 5 DEG C ~ 40 DEG C, when carrying out system calibration, temperature is 20 DEG C ± 1 DEG C, when scene temperature and base measuring temperature variant time start-up temperature compensation program compensate, temperature compensation program allows instrument and work test block group 15 leave standstill more than 30 minutes in the space of temperature constant, then use the conductivity values in conductivity meter read work test block group 15, obtain penalty coefficient;
4th step, demarcates without the region of conductive materials near upper eddy conductivity probe 9 and the next eddy conductivity probe 10 being moved to;
5th step, moves to the enterprising rower of work test block group 15 by upper eddy conductivity probe 9 and the next eddy conductivity probe 10 fixed;
6th step, moves to aluminum alloy pretensioning plate 13 by upper eddy conductivity probe 9 and the next eddy conductivity probe 10, carries out continuous grid type scanning to the upper surface of aluminum alloy pretensioning plate, lower surface; The object of described grid type scanning gathers sheet material conductivity value transversely, and concrete grammar is the transverse direction at grid, gathers a conductivity data point at interval of 5mm-100mm; In the longitudinal direction of grid, gather the horizontal conductivity data point of a row at interval of 20mm-600mm, stop in longitudinal movement gathering conductivity data point; Described transverse direction be by popping one's head in 9 with the upper eddy conductivity that upper Bit Track 2 and lower Bit Track 3 mate respectively, the next eddy conductivity pops one's head in and 10 moves forward into line scanning; Described longitudinal direction moves along the longitudinal for being supported by rollgang 14 and ordered about aluminum alloy pretensioning plate 13; Once need demarcate in work test block group 15 every 15 minutes in the process of described grid type scanning.
embodiment 2:
Principle of work is identical with embodiment 1, and difference is the frequency of pulsed eddy current probe is 100kHz, and upper eddy conductivity probe 9 and the next eddy conductivity probe 10 are 1.5mm with the distance on aluminum alloy pretensioning plate 13 surface; The conductivity values of the work test block group be made up of 4 pieces of conductivity test blocks the 15,1st piece is 16.0 ± 5.0%IACS; The conductivity values of the 2nd piece is 29.0 ± 5.0%IACS; The conductivity values of the 3rd piece is 42.0 ± 5.0%IACS; The conductivity values of the 4th piece is 60.0 ± 5.0%IACS.
embodiment 3:
Principle of work and embodiment 1,2 identical, difference is the frequency of pulsed eddy current probe is 80kHz, and upper eddy conductivity probe 9 and the next eddy conductivity probe 10 are 1.0mm with the distance on aluminum alloy pretensioning plate 13 surface; The conductivity values of the work test block group be made up of 3 pieces of conductivity test blocks the 15,1st piece is 16.0 ± 5.0%IACS; The conductivity values of the 2nd piece is 29.0 ± 5.0%IACS; The conductivity values of the 3rd piece is 42.0 ± 5.0%IACS.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the detection system of an aluminum alloy pretensioning plate conductivity value, comprise support, it is characterized in that, in the middle of described support, be provided with the rollgang (14) transporting aluminum alloy pretensioning plate (13), work test block group (15) is also installed in the middle of support, and with rollgang (14) horizontal parallel; The support of rollgang (14) top is provided with upper sliding shoe, the support of rollgang (14) below is provided with downslide motion block, upper sliding shoe connects upper probe bearing (6), the bottom face of described upper probe bearing (6) is provided with upper eddy conductivity probe (9), downslide motion block connects the next probe bearing (7), and the upper surface of described bottom probe bearing (7) is provided with the next eddy conductivity probe (10); Described upper eddy conductivity probe (9) is connected with upper eddy current conduc (20), and the next eddy conductivity probe (10) is connected with the next eddy current conduc (21).
2. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 1, it is characterized in that: described upper probe bearing (6) is provided with buphthalmos multi-directional ball (8), and buphthalmos multi-directional ball (8) and upper eddy conductivity are popped one's head in, (9) are arranged on same end face; The next probe bearing (7) is provided with buphthalmos multi-directional ball (8), and buphthalmos multi-directional ball (8) and the next eddy conductivity are popped one's head in, (10) are arranged on same end face.
3. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 1, is characterized in that: described support is portal frame (1); One end of support is also provided with regulator cubicle (11); The upper telescopic machine mechanical arm (4) that described upper sliding shoe comprises Bit Track (2) and mates with upper Bit Track (2); The next telescopic machine mechanical arm (5) that described downslide motion block comprises lower Bit Track (3) and mates with lower Bit Track (3); Described upper telescopic machine mechanical arm (4) end is provided with upper probe bearing (6), and described the next telescopic machine mechanical arm (5) end is provided with the next probe bearing (7); Described regulator cubicle (11) is also provided with man-machine interface (12); Regulator cubicle (11) two ends are connected with upper eddy current conduc (20), the next eddy current conduc (21) respectively by upper crawler type cable (18), the next crawler type cable (19).
4. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 1, is characterized in that: the porch of described portal frame (1) is also provided with laser sensor (16) and rotary encoder (17), corresponding connection regulator cubicle (11).
5. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 1, is characterized in that: described upper eddy conductivity probe (9), the next eddy conductivity probe (10) are pulsed eddy current probe.
6. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 5, is characterized in that: the frequency of described pulsed eddy current probe is 50kHz-100kHz.
7. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 1, is characterized in that: described upper eddy conductivity probe (9) and the next eddy conductivity probe (10) are 0.25mm-1.5mm with the distance on aluminum alloy pretensioning plate (13) surface.
8. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 1, is characterized in that: described work test block group (15) is made up of the test block of 2-4 block conductivity.
9. the detection system of aluminum alloy pretensioning plate conductivity value according to claim 1, is characterized in that: also comprise the laboratory test block group (22) for calibration operation test block group (15); Described laboratory test block group (22) is made up of 6 pieces of conductivity test blocks.
10. a using method for the detection system of aluminum alloy pretensioning plate conductivity value, is characterized in that: comprise following concrete steps:
The first step, sets up lift-off-temperature and suppresses database;
Second step, inputs the physical dimension of aluminum alloy pre-stretching plate, alloy designations, alloy state and conductivity in a device and checks and accepts bound information;
3rd step, according to scene temperature, arrange system temperature to compensate, scene temperature is 5 DEG C ~ 40 DEG C, when carrying out system calibration, temperature is 20 DEG C ± 1 DEG C, when scene temperature and base measuring temperature variant time start-up temperature compensation program compensate, temperature compensation program allows instrument and work test block group (15) leave standstill more than 30 minutes in the space of temperature constant, then use the conductivity values on conductivity meter read work test block group (15), obtain penalty coefficient;
4th step, demarcates without the region of conductive materials near upper eddy conductivity probe (9) and the next eddy conductivity probe (10) being moved to;
5th step, moves to work test block group (15) enterprising rower by upper eddy conductivity probe (9) and the next eddy conductivity probe (10) fixed;
6th step, upper eddy conductivity probe (9) and the next eddy conductivity are popped one's head in (10) move to aluminum alloy pretensioning plate (13), carry out continuous grid type scanning to the upper surface of aluminum alloy pretensioning plate, lower surface; The object of described grid type scanning gathers sheet material conductivity value transversely, and concrete grammar is the transverse direction at grid, gathers a conductivity data point at interval of 5mm-100mm; In the longitudinal direction of grid, gather the horizontal conductivity data point of a row at interval of 20mm-600mm, stop in longitudinal movement gathering conductivity data point; Described transverse direction be by popping one's head in (9) with the upper eddy conductivity that upper Bit Track (2) and lower Bit Track (3) mate respectively, the next eddy conductivity pop one's head in (10) move forward into line scanning; Described longitudinal direction moves along the longitudinal for being supported by rollgang (14) and ordered about aluminum alloy pretensioning plate (13); Once need demarcate in work test block group (15) every 15 minutes in the process of described grid type scanning.
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| CN107421827A (en) * | 2017-07-30 | 2017-12-01 | 湖南华菱湘潭钢铁有限公司 | A kind of method of quick measurement steel plate quenching uniformity |
| CN111623913A (en) * | 2020-05-18 | 2020-09-04 | 广西南南铝加工有限公司 | Nondestructive testing method and equipment for residual stress of aluminum alloy |
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| CN1092171A (en) * | 1993-11-22 | 1994-09-14 | 冶金工业部钢铁研究总院 | High temperature continuous casting billet eddy-current detector for surface defect |
| CN1463809A (en) * | 2002-06-28 | 2003-12-31 | 宝山钢铁股份有限公司 | Process for detecting sheet steel product cross-sectional outline and shape |
| CN201791741U (en) * | 2010-09-30 | 2011-04-13 | 宝山钢铁股份有限公司 | Measuring device for detecting transverse thickness distribution of thin-specification plate materials |
| CN103163216A (en) * | 2013-03-14 | 2013-06-19 | 天津大学 | Defect identification and evaluation method of metallic conductor based on giant magnetoresistance sensor |
| CN203711483U (en) * | 2013-12-23 | 2014-07-16 | 李慧敏 | Electromagnetic vibration type rolled steel shape detection device |
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| CN107421827A (en) * | 2017-07-30 | 2017-12-01 | 湖南华菱湘潭钢铁有限公司 | A kind of method of quick measurement steel plate quenching uniformity |
| CN111623913A (en) * | 2020-05-18 | 2020-09-04 | 广西南南铝加工有限公司 | Nondestructive testing method and equipment for residual stress of aluminum alloy |
| CN111623913B (en) * | 2020-05-18 | 2021-09-07 | 广西南南铝加工有限公司 | Nondestructive testing method and equipment for residual stress of aluminum alloy |
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