CN203455309U - Magnetic suspension concentration measuring device for magnetic powder inspection - Google Patents

Magnetic suspension concentration measuring device for magnetic powder inspection Download PDF

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Publication number
CN203455309U
CN203455309U CN201320378636.0U CN201320378636U CN203455309U CN 203455309 U CN203455309 U CN 203455309U CN 201320378636 U CN201320378636 U CN 201320378636U CN 203455309 U CN203455309 U CN 203455309U
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measurement mechanism
particle content
magnetic
horizontal circle
magnetic powder
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万升云
陈建生
姚荣文
章文显
刘仕远
郑小康
卢东磊
任好娟
王锡锋
张琪
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CRRC Qishuyan Institute Co Ltd
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CRRC Qishuyan Institute Co Ltd
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Abstract

The utility model relates to a magnetic suspension concentration measuring device for magnetic powder inspection, belonging to the technical field of material defect detection. The magnetic suspension concentration measuring device comprises a rack base, wherein a lifting device is arranged on the rack base, a horizontally encircled coil arranged on the rack base and used for forming a uniform magnetic field is arranged on one side of the lifting device, a clamping arm is extended from the lifting device towards the horizontally encircled coil, and the clamping arm is provided with a precipitation tube clamping mechanism. The magnetic suspension concentration measuring device breaks through the routine of visual inspection for measurement in the existing technology, can scientifically and quantitatively measure the content of magnetic powder in the magnetic suspension by use of instruments and calibration curves, and has the remarkable advantages of accuracy, rapidness, convenience in operation and the like.

Description

A kind of magnetic powder inspection Particle content measurement mechanism
Technical field
The utility model relates to a kind of measurement mechanism of Non-Destructive Testing material, and especially a kind of magnetic powder inspection Particle content measurement mechanism, belongs to fault in material Detection Techniques field.
Background technology
It is to utilize magnetic phenomenon to detect a kind of lossless detection method of ferrimagnet surface of the work and near surface flaw that magnetic detects.Its ultimate principle is: when workpiece is magnetized, existence due to uncontinuity defect, make the magnetic line of force on surface of the work and nearly surface local distortion occur and produce stray field, absorption is applied to the magnetic of surface of the work, under suitable illumination, form visual visible magnetic trace, thereby demonstrate position, size, shape and the order of severity of uncontinuity defect.
Magnetic detection method is different according to carrier fluid used in testing process or carrier, can be divided into wet method detection and dry method and detect.Wet method detects compared with dry method, has that detection efficiency is high, magnetic flaw detection ink is recyclable, the detection sensitivity advantages of higher to surface of the work tiny flaw, applies more extensive.And wet method is Particle content to a very important index of the evaluation of magnetic flaw detection ink in detecting, this concentration is very large on the sensitivity impact of display defect, and concentration is different, and magnetic particle testing sensitivity is also different.Concentration is too low, affects the adsorbance of stray field to magnetic, thus magnetic particle indications unintelligible cause undetected; Concentration is too high, can be detained a lot of magnetics at surface of the work, forms excessive background, likely causes subterranean weakness magnetic particle indications.In addition, when different workpiece is carried out to the detection of wet method magnetic, should select suitable Particle content according to the surface state of workpiece.Generally, detecting shaggy foundry goods wants the forging that specific surface is bright and clean to select the higher magnetic flaw detection ink of concentration.Therefore, regularly, fast, quantitatively, accurately grasp the size of Particle content in magnetic testing process, to guaranteeing detection sensitivity and result reliability, avoid erroneous judgement, leak visit very important.
The method of existing magnetic powder inspection technology controlling and process Particle content is the qualified bound scope that the milliliter number precipitating in pyriform sediment tube (100ml) with magnetic is demarcated (definite) Particle content mostly.Both at home and abroad relevant magnetic non-destructive testing standard to the bound scope dictates of qualified magnetic liquid concentration in Table 1.
The Particle content scope of table 1 correlation standard
Figure DEST_PATH_GDA0000398962440000021
Observe the time of magnetic precipitation milliliter number in concentration sediment tube (100ml) and stipulate according to related standards, oiliness carrier fluid magnetic flaw detection ink needs observe after precipitation for 1 hour, and water carrier fluid magnetic flaw detection ink needs to observe after 30 minutes.
In practice, reflect that there are the following problems:
1) observe the concentration of particle content in the milliliter number reflection magnetic flaw detection ink that in concentration sediment tube, magnetic precipitates, be easy to be subject to magnetic flaw detection ink pollutant (dust, staple foreign material, greasy dirt etc.) impact, accuracy of detection is lower, is difficult to obtain testing result accurately.
2) observe the magnetic settling time in concentration sediment tube oversize (oiliness carrier fluid 1 hour, water carrier fluid 30 minutes) in magnetic flaw detection ink, be unfavorable for guaranteeing normally carrying out of production.
3) by the method for particle content (or height) in concentration sediment tube precipitation magnetic flaw detection ink, be used for determining the qualified bound scope of Particle content, in fact all belong to observational measurement, cannot do one to particle content in magnetic flaw detection ink and measure accurately.Therefore the confirmation to magnetic flaw detection ink optimum concentration value under existing defects detecting technology, is difficult to realize.
As the Chinese utility model patent application of publication number CN102830156A discloses a kind of online dynamically real-time monitoring device of Particle content, it mainly utilizes the magnetic in pulse transient state alternating electromagnetism field excitation constant volume (100ml) magnetic flaw detection ink, receive the secondary reflection magnetic field that magnetic produces, electromagnetic detection instrument can be analyzed, remember its characteristic signal, when detected Particle content diminishes or becomes large, the intensity in the secondary reflection magnetic field that in detected magnetic flaw detection ink, magnetic produces is different from the intensity in the secondary reflection magnetic field of standard magnetic flaw detection ink magnetic generation, with this, carry out the variation of the tested Particle content of dynamic Real-Time Monitoring, when tested Particle content value exceeds the bound scope of permission, electromagnetic detection instrument is reported to the police.Although this device has solved the real-time monitoring that production scene changes for Particle content value.But it is still according to upper and lower limit standard and judges for the measurement of tested Particle content, the result recording is in essence a value range, can not realize the Measurement accuracy to Particle content.
Utility model content
The purpose of this utility model is: the problem existing for above-mentioned prior art, propose a kind of for to realize the magnetic powder inspection that Particle content measuring method lays the foundation Particle content measurement mechanism for brand-new magnetic powder inspection, thereby can fast, accurately obtain the testing result of Particle content for magnetic powder inspection.
Above-mentioned brand-new magnetic powder inspection is as follows by Particle content measuring method step:
(for example 0.1 gram of step 1, at least three predetermined quality of general, 0.2 gram, ...) magnetic put into respectively the concentration sediment tube of respective amount, in each concentration sediment tube, inject respectively again the liquid medium (oiliness carrier fluid or water carrier fluid) of demarcating volume (demarcating volume by relevant criterion is 100ml), as the reference cell of demarcating Particle content;
Step 2, the uniform magnetic field of putting into predetermined strength as the reference cell of demarcating Particle content is done to relative motion, make magnetic uniform settling in concentration sediment tube, obtain the smooth benchmark standard specimen of deposition;
Step 3, in the given time, puts into benchmark standard specimen the electromagnetic induction coil that (one by one or simultaneously) is connected to Displaying Meter, obtains one group of electromagnetic induction measured value;
Step 4, take the quality of the interior magnetic of electromagnetic induction measured value and unit volume (can with demarcate volume equate) as X, Y coordinate respectively, set up two-dimensional coordinate system, formation electromagnetic induction measured value and Particle content variation relation curve;
The magnetic flaw detection ink to be measured of the same liquid medium of volume is demarcated in step 5, the collection of use concentration sediment tube, puts into the uniform magnetic field of predetermined strength and does relative motion, makes magnetic uniform settling in concentration sediment tube, obtains the smooth sample to be tested of deposition;
Step 6, in the given time, puts into sample to be tested the electromagnetic induction coil that is connected to Displaying Meter, obtains electromagnetic induction measured value; And determine corresponding Particle content value by above-mentioned electromagnetic induction measured value with Particle content variation relation curve.
Realize the method as very difficult in not only do not operated by suitable measurement mechanism, and unavoidable human factor impact, measuring accuracy cannot be guaranteed.For this reason, applicant has proposed the basic technical scheme of the utility model magnetic powder inspection with Particle content measurement mechanism: contain gantry base, in described gantry base, be mounted with jacking gear; One side of described jacking gear has in the gantry base of being placed in order to form the horizontal circle coil of uniform magnetic field; Described jacking gear extends clamping limb towards horizontal circle coil direction, and described clamping limb has sediment tube clamping device.
Sediment tube clamping device is preferably positioned at directly over horizontal circle hub of a spool.
During use, as long as sediment tube is clamped on clamping limb, by controlling motor, can make sediment tube steadily steadily lifting in horizontal circle coil as required, realize required " stretching ", i.e. rapid subsidence.
In order to make magnetic settling velocity faster, and avoid a small amount of magnetic to be adsorbed on tube wall, affect accuracy of detection, above-mentioned brand-new magnetic powder inspection is with in Particle content measuring method step 2 and step 5, make magnetic in concentration sediment tube in uniform settling process, apply a disturbed magnetic field (its change of magnetic field strength for example changes with sinusoidal rule).
For this reason, magnetic powder inspection of the present utility model also contains the horizontal circle coil that produces disturbed magnetic field with Particle content measurement mechanism, the horizontal circle coil of described generation disturbed magnetic field can be positioned at horizontal circle coil below and coaxially arrange, also can be positioned at horizontal circle coil one side, can also with horizontal circle coil consubstantiality, during operation, pass into respectively constant current and variable-current according to certain rules, thereby form required uniform magnetic field and disturbed magnetic field.
The utility model further improves, also contain electromagnetic detection instrument, described electromagnetic detection instrument is comprised of electromagnetic induction measurement mechanism and display instrument, described electromagnetic induction measurement mechanism comprises sediment tube support and is positioned at the electromagnetic inductor of sediment tube frame bottom, the signal input part of display instrument described in the transducing signal output termination of described electromagnetic inductor.Like this, complete " stretching " of sediment tube, magnetic after uniform settling, can be transferred on measurement mechanism in sediment tube, measuring accordingly in time.
As can be seen here, the utility model forms for realizing above-mentioned brand-new Particle content measuring method.After employing, can conscientiously realize this magnetic powder inspection Particle content measuring method, thereby break through in existing magnetic powder inspection technique and measure the routine that Particle content detects by an unaided eye, by magnetic powder inspection with Particle content measurement mechanism quick and stable sedimentation magnetic and by electromagnetic detection instrument, complete to particle content in magnetic flaw detection ink carry out accurately, the quantitative measurment of quick, science.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is the structural representation of the utility model embodiment mono-.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is the structural representation of the utility model embodiment bis-.
Embodiment
Embodiment mono-
The magnetic powder inspection of the present embodiment with Particle content measurement mechanism as shown in Figure 1, 2, 3, is mounted with jacking gear 8 and in order to form the upper and lower two coaxial horizontal circle coils 2 of uniform magnetic field in gantry base 1.Jacking gear 8 comprises that motor 3 drives vertical screw mandrel 8-1, column guide rail 8-2 and the elevator 8-3 parallel with vertical screw mandrel of rotation.Elevator 8-3 and vertical screw mandrel 8-1 form screw pair, form moving sets with guide rail 8-2 simultaneously.Elevator 8-3 extends clamping limb 8-4 towards horizontal circle coil direction, and this clamping limb has sediment tube 4 clamping devices directly over being positioned at horizontal circle hub of a spool.This sediment tube clamping device has shackle-type opening/closing/locking structure.In addition, in gantry base 1 and be positioned at horizontal circle coil 2 one sides, the fixing horizontal coil 9 that produces disturbed magnetic field.Horizontal circle coil 2 both sides are settled respectively and are formed electromagnetic induction measurement mechanism 6 and the display instrument 7 of stating electromagnetic detection instrument.Electromagnetic induction measurement mechanism 6 has former and later two, and each electromagnetic induction measurement mechanism 6 comprises sediment tube support 6-2 and is positioned at the electromagnetic inductor 6-1 of sediment tube frame bottom, the signal input part of the transducing signal output termination display instrument 7 of electromagnetic inductor 6-1.The signal contrast use of one of two electromagnetic induction measurement mechanisms during only as test samples, further prioritization scheme is: wherein the electromagnetic induction measurement mechanism as test samples contrast use can not comprise sediment tube support 6-2, only has electromagnetic inductor 6-1.A plurality of electromagnetic induction measurement mechanisms 6 can also be set, to facilitate simultaneously, a plurality of samples be detected.
When carrying out magnetic powder inspection and measuring with Particle content, carry out as follows:
Step 1, by the one group of predetermined grams 0.1 accurately weighing with balance, 0.2, ... 0.6 MPI fluorescent magnetic particles is put into respectively one group of concentration sediment tube 4, again by inject demarcating respectively the oiliness carrier fluid (water carrier fluid also can) of volume 100ml in each concentration sediment tube, as the reference cell of demarcating Particle content.
Step 2, the concentration sediment tube 4 as reference cell is placed in jacking gear 8 successively, starter motor 3, put it into gradually in the uniform magnetic field with wound coil 2 centers of Current Control predetermined strength, relative magnetic field uniform motion, be put into again in disturbed magnetic field, make magnetic rapid uniform settling in concentration sediment tube, obtain that deposition is smooth, the loose dress of magnetic is than consistent benchmark standard specimen.
Step 3, at 2-3min, in the schedule time, benchmark standard specimen is put into one by one on the electromagnetic induction measurement mechanism 6 of one of them, lower end enters in the electromagnetic induction coil 6-2 that is connected to Displaying Meter 7, obtains one group of electromagnetic induction measured value.
Step 4, to take the contained predetermined grams of magnetic of electromagnetic induction measured value and 100ml oiliness carrier fluid matter (water carrier fluid also can) be respectively X, Y coordinate, set up two-dimensional coordinate system, and according to predetermined grams described point in two-dimensional coordinate system of electromagnetic induction measured value corresponding to each benchmark standard specimen and magnetic, again each point is connected with smooth curve, form electromagnetic induction measured value and Particle content variation relation curve.
Step 5, in production scene, with concentration sediment tube, gather the magnetic flaw detection ink to be measured of the same liquid medium of 100ml, be placed in jacking gear 8, starter motor 3, put it into gradually in the uniform magnetic field with horizontal circle coil 2 centers of Current Control predetermined strength, relative magnetic field uniform motion, relend and help disturbed magnetic field effect, make magnetic rapid uniform settling in concentration sediment tube, obtain the smooth sample to be tested of deposition.
Step 6, at 2-3min in the schedule time, sample to be tested is put on electromagnetic induction measurement mechanism 6, lower end enters in the electromagnetic induction coil 6-2 that is connected to Displaying Meter 7, obtains electromagnetic induction measured value, by above-mentioned variation relation curve, is determining corresponding Particle content value.
The present embodiment provides measurement mechanism and the measuring method of a set of Particle content accurately and rapidly.Can direct quantitative measure the particle content (mg/100ml) in magnetic flaw detection ink in concentration sediment tube, and be not subject to non magnetic pollutant effects in magnetic flaw detection ink, not only improved the precision detecting, simultaneously to obtaining in real time best Particle content scope under field working conditions, instructing the precision ratio of actual production and raising defect to there is vital role.Facts have proved, the measurement mechanism of the present embodiment determines that from being sampled to the time of the whole process of Particle content numerical value only needs 3-6 minute, detection speed and efficiency far are higher than domestic and foreign current standard code, and oiliness carrier fluid precipitation 1 hour, water carrier fluid precipitation are observed magnetic subsidence volumn in concentration sediment tube (or height) after 30 minutes.The situation of following table reflection contrast test.
Figure DEST_PATH_GDA0000398962440000071
Figure DEST_PATH_GDA0000398962440000081
Embodiment bis-
The magnetic powder inspection of the present embodiment reflects basic structure of the present utility model with Particle content measurement mechanism, as shown in Figure 4, in gantry base 1, be mounted with the rear horizontal circle coil 2 that forms uniform magnetic field of energising, the vertical lift device 8 that the top of horizontal circle coil 2 settles motor 3 to drive by gear train.The horizontal circle coil 9 that produces disturbed magnetic field is controlled in the positioned beneath energising of horizontal circle coil 2.Be that uniform magnetic field forms by radially vertical with concentration sediment tube direction of motion coaxial coil with disturbed magnetic field.Other structure and embodiment mono-are basic identical.
Because uniform magnetic field consists of radially vertical with concentration sediment tube direction of motion coaxial coil with disturbed magnetic field, therefore sediment tube is put into gradually to the uniform magnetic field at wound coil 2 centers, relatively magnetic field uniform motion and pass through after, can be by disturbed magnetic field effect, make magnetic rapid uniform settling in concentration sediment tube, obtain that deposition is smooth, the loose dress of magnetic is than consistent benchmark standard specimen, more convenient operation, quick.
In addition to the implementation, the utility model can also have other embodiments.For example the upper and lower coaxial horizontal wound coil for generation of uniform magnetic field can increase and decrease quantity as required; Produce disturbed magnetic field coil can with the horizontal circle coil consubstantiality that forms uniform magnetic field, during operation, successively pass into constant current and variable-current according to certain rules, can successively form required uniform magnetic field and disturbed magnetic field; Electromagnetic detection instrument can split setting; Electromagnetic induction measurement mechanism and display instrument are placed in respectively on the support base of horizontal circle coil both sides; Electromagnetic induction measurement mechanism has two at least; Etc..All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims (10)

1. a magnetic powder inspection Particle content measurement mechanism, is characterized in that: contain gantry base, in described gantry base, be mounted with jacking gear; One side of described jacking gear has in the gantry base of being placed in order to form the horizontal circle coil of uniform magnetic field; Described jacking gear extends clamping limb towards horizontal circle coil direction, and described clamping limb has sediment tube clamping device.
2. magnetic powder inspection according to claim 1 Particle content measurement mechanism, is characterized in that: described sediment tube clamping device is positioned at directly over horizontal circle hub of a spool.
3. magnetic powder inspection according to claim 2 Particle content measurement mechanism, it is characterized in that: also contain the horizontal circle coil that produces disturbed magnetic field, the horizontal circle coil of described generation disturbed magnetic field is positioned at the horizontal circle coil below that forms uniform magnetic field and horizontal circle coil one side that coaxially arranges or be positioned at formation uniform magnetic field.
4. magnetic powder inspection according to claim 2 Particle content measurement mechanism, is characterized in that: also contain the horizontal circle coil that produces disturbed magnetic field, the horizontal circle coil of described generation disturbed magnetic field and the horizontal circle coil consubstantiality that forms uniform magnetic field.
5. according to the magnetic powder inspection Particle content measurement mechanism described in claim 1,2,3 or 4, it is characterized in that: also contain electromagnetic detection instrument, described electromagnetic detection instrument is comprised of electromagnetic induction measurement mechanism and display instrument, described electromagnetic induction measurement mechanism comprises sediment tube support and is positioned at the electromagnetic inductor of sediment tube frame bottom, the signal input part of display instrument described in the transducing signal output termination of described electromagnetic inductor.
6. magnetic powder inspection according to claim 5 Particle content measurement mechanism, is characterized in that: described electromagnetic induction measurement mechanism and display instrument are placed in respectively on the support base of horizontal circle coil both sides.
7. magnetic powder inspection according to claim 6 Particle content measurement mechanism, is characterized in that: described jacking gear comprises that motor drives the vertical screw mandrel of rotation, column guide rail and the elevator parallel with vertical screw mandrel; Described elevator and vertical screw mandrel form screw pair, and form moving sets with column guide rail.
8. magnetic powder inspection according to claim 7 Particle content measurement mechanism, is characterized in that: described elevator extends clamping limb towards horizontal circle coil direction.
9. magnetic powder inspection according to claim 8 Particle content measurement mechanism, is characterized in that: described sediment tube clamping device has shackle-type opening/closing/locking structure.
10. magnetic powder inspection according to claim 9 Particle content measurement mechanism, is characterized in that: described electromagnetic induction measurement mechanism has two at least.
CN201320378636.0U 2013-06-27 2013-06-27 Magnetic suspension concentration measuring device for magnetic powder inspection Withdrawn - After Issue CN203455309U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344536A (en) * 2013-06-27 2013-10-09 南车戚墅堰机车车辆工艺研究所有限公司 Magnetic suspension concentration measurement device for magnetic powder flaw detection
CN104898717A (en) * 2014-03-05 2015-09-09 射阳县智能探伤设备有限公司 Magnetic suspension liquid concentration intelligent control device
CN105987890A (en) * 2015-02-13 2016-10-05 宝山钢铁股份有限公司 Magnetic suspension concentration estimating method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344536A (en) * 2013-06-27 2013-10-09 南车戚墅堰机车车辆工艺研究所有限公司 Magnetic suspension concentration measurement device for magnetic powder flaw detection
CN103344536B (en) * 2013-06-27 2015-06-10 南车戚墅堰机车车辆工艺研究所有限公司 Magnetic suspension concentration measurement device for magnetic powder flaw detection
CN104898717A (en) * 2014-03-05 2015-09-09 射阳县智能探伤设备有限公司 Magnetic suspension liquid concentration intelligent control device
CN104898717B (en) * 2014-03-05 2018-02-23 射阳县智能探伤设备有限公司 Particle content intelligent controlling device
CN105987890A (en) * 2015-02-13 2016-10-05 宝山钢铁股份有限公司 Magnetic suspension concentration estimating method
CN105987890B (en) * 2015-02-13 2018-12-07 宝山钢铁股份有限公司 Particle content evaluation method

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