CN103344536A - Magnetic suspension concentration measurement device for magnetic powder flaw detection - Google Patents
Magnetic suspension concentration measurement device for magnetic powder flaw detection Download PDFInfo
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- CN103344536A CN103344536A CN2013102626208A CN201310262620A CN103344536A CN 103344536 A CN103344536 A CN 103344536A CN 2013102626208 A CN2013102626208 A CN 2013102626208A CN 201310262620 A CN201310262620 A CN 201310262620A CN 103344536 A CN103344536 A CN 103344536A
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 106
- 238000005259 measurement Methods 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 29
- 239000000725 suspension Substances 0.000 title abstract 6
- 239000013049 sediment Substances 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 239000002245 particle Substances 0.000 claims description 56
- 230000005674 electromagnetic induction Effects 0.000 claims description 28
- 238000007689 inspection Methods 0.000 claims description 26
- 230000002463 transducing effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000011088 calibration curve Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 20
- 239000012530 fluid Substances 0.000 description 13
- 238000012360 testing method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000005426 magnetic field effect Effects 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention relates to a magnetic suspension concentration measurement device for magnetic powder flaw detection, and belongs to the technical field of material flaw detection. The magnetic suspension concentration measurement device comprises a stander base, wherein a lifting device is arranged on the stander base; a horizontal surrounding coil which is arranged on the stander base and is used for forming a uniform magnetic field is arranged on one side of the lifting device; the lifting device extends towards the horizontal surrounding coil to form a clamping arm; the clamping arm is provided with a sediment pipe clamping mechanism. According to the magnetic suspension concentration measurement device, the rule of observation by eyes in an existing technology is broken through; the magnetic powder content of magnetic suspension can be scientifically and quantitatively measured through an instrument and a calibration curve; the magnetic suspension concentration measurement device has the outstanding advantages of accuracy, quickness, simplicity in operation and the like.
Description
Technical field
The present invention relates to a kind of measurement mechanism of Non-Destructive Testing material, 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, because the existence of uncontinuity defective, make the magnetic line of force on surface of the work and nearly surface local distortion take place 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 defective.
The magnetic detection method can be divided into wet method detection and dry method and detect according to carrier fluid used in the testing process or carrier difference.Wet method detects than dry method, have detection efficiency height, magnetic flaw detection ink recyclable, to the detection sensitivity advantages of higher of surface of the work tiny flaw, use more extensive.And wet method is Particle content to a very important index of the evaluation of magnetic flaw detection ink in detecting, and this concentration is very big to the sensitivity influence of display defect, the concentration difference, and magnetic particle testing sensitivity is also different.Concentration is too low, influences stray field to the adsorbance of magnetic, thereby the magnetic trace shows the unintelligible omission that causes; Concentration is too high, can be detained a lot of magnetics at surface of the work, forms excessive background, might cause subterranean weakness magnetic trace to show.In addition, when different workpiece is carried out 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 bright and clean forging of specific surface to select the higher magnetic flaw detection ink of concentration.Therefore, regularly, fast, quantitatively, accurately grasp the size of Particle content in the magnetic testing process, to guarantee 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 of demarcating (namely determine) Particle content with the milliliter number that magnetic precipitates in pyriform sediment tube (100ml) mostly.Relevant magnetic non-destructive testing standard sees Table 1 to the bound scope dictates of qualified magnetic liquid concentration both at home and abroad.
The Particle content scope of table 1 correlation standard
Observe the time of magnetic precipitation milliliter number in the concentration sediment tube (100ml) and stipulate that according to related standards oiliness carrier fluid magnetic flaw detection ink needs 1 hour post precipitation to observe, the water carrier fluid magnetic flaw detection ink needs to observe after 30 minutes.
Reflect in the practice that there are the following problems:
1) concentration of particle content is easy to be subjected to magnetic flaw detection ink pollutant (dust, staple foreign material, greasy dirt etc.) influence in the milliliter number reflection magnetic flaw detection ink that magnetic precipitates in the observation concentration sediment tube, and accuracy of detection is lower, is difficult to obtain testing result accurately.
2) observe magnetic settling time in the concentration sediment tube oversize (oiliness carrier fluid 1 hour, water carrier fluid 30 minutes) in the magnetic flaw detection ink, what be unfavorable for guaranteeing producing normally carries out.
3) (or highly) method is used for determining the qualified bound scope of Particle content, in fact all belongs to observational measurement, can't do one to particle content in the magnetic flaw detection ink and measure accurately with particle content in the concentration sediment tube precipitation magnetic flaw detection ink.Therefore to the affirmation of magnetic flaw detection ink optimum concentration value under the existing defects detecting technology, be difficult to realize.
A kind of online dynamic real-time monitoring device of Particle content is disclosed as the Chinese invention patent application of publication number CN102830156A, 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, the electromagnetic detection instrument can be analyzed, remember its characteristic signal, when detected Particle content diminishes or becomes big, the intensity in the secondary reflection magnetic field that magnetic produces in the detected magnetic flaw detection ink is different from the intensity in the secondary reflection magnetic field of standard magnetic flaw detection ink magnetic generation, come dynamic real-time to monitor the variation of tested Particle content with this, when tested Particle content value exceeded the bound scope of permission, the electromagnetic detection instrument was reported to the police.Though this device has solved the real-time monitoring that the production scene changes for the Particle content value.But it is for the measurement of tested Particle content, is still according to the upper and lower limit standard and judges, the result who records in essence is a value range, can not realize the accurate measurement to Particle content.
Summary of the invention
The objective of the invention is to: at the problem of above-mentioned prior art existence, propose a kind of magnetic powder inspection Particle content measurement mechanism for realizing that brand-new magnetic powder inspection lays the foundation with the Particle content measuring method, thereby can fast, accurately obtain the testing result that Particle content is used in magnetic powder inspection.
Above-mentioned brand-new magnetic powder inspection is as follows with Particle content measuring method step:
The magnetic flaw detection ink to be measured of the same liquid medium of volume is demarcated in step 5, the collection of usefulness concentration sediment tube, puts into the uniform magnetic field of predetermined strength and does relative motion, makes magnetic uniform settling in the concentration sediment tube, obtains the smooth sample to be tested of deposition;
Realize that this method is very difficult as not only not operating by suitable measurement mechanism, and unavoidable human factor influence, measuring accuracy can't be guaranteed.For this reason, the applicant has proposed magnetic powder inspection of the present invention with the basic technical scheme of Particle content measurement mechanism: contain gantry base, be mounted with jacking gear on the described gantry base; One side of described jacking gear has on 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 the horizontal circle coil direction, and described clamping limb has the sediment tube clamping device.
The sediment tube clamping device preferably is positioned at directly over the horizontal circle hub of a spool.
During use, as long as sediment tube is clamped on the clamping limb, by controlling motor, can make sediment tube steadily steadily lifting in the horizontal circle coil as required, realize required " stretching ", i.e. rapid subsidence.
In order to make the magnetic settling velocity faster, and avoid a small amount of magnetic to be adsorbed on the tube wall, influence accuracy of detection, above-mentioned brand-new magnetic powder inspection is with in Particle content measuring method step 2 and the step 5, make magnetic in the concentration sediment tube in the 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 invention also contains the horizontal circle coil that produces disturbed magnetic field with the Particle content measurement mechanism, the horizontal circle coil of described generation disturbed magnetic field can be positioned at horizontal circle coil below and coaxial setting, also can be positioned at horizontal circle coil one side, can also with horizontal circle coil consubstantiality, feed constant current and variable-current according to certain rules during operation respectively, thereby form required uniform magnetic field and disturbed magnetic field.
The present invention further improves, also contain the electromagnetic detection instrument, described electromagnetic detection instrument is made up of electromagnetic induction measurement mechanism and display instrument, described electromagnetic induction measurement mechanism comprises the sediment tube support and is positioned at the electromagnetic inductor of sediment tube frame bottom, the signal input part of the described display instrument of transducing signal output termination of described electromagnetic inductor.Like this, finish " stretching " of sediment tube, magnetic behind the uniform settling, can be transferred on the measurement mechanism in sediment tube, in time measuring accordingly.
This shows that the present invention forms for realizing above-mentioned brand-new Particle content measuring method.After the employing, can realize this magnetic powder inspection Particle content measuring method conscientiously, thereby break through and measure the routine that Particle content detects by an unaided eye in the existing magnetic powder inspection technology, by magnetic powder inspection with Particle content measurement mechanism quick and stable sedimentation magnetic and by the electromagnetic detection instrument, finish to particle content in the magnetic flaw detection ink carry out accurately, fast, the scientific quantitative measurement.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of the embodiment of the invention one.
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 embodiment of the invention two.
Embodiment
Embodiment one
The magnetic powder inspection of present embodiment is mounted with jacking gear 8 and with the Particle content measurement mechanism as shown in Figure 1, 2, 3 in order to form upper and lower two coaxial horizontal circle coils 2 of uniform magnetic field on the 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 constitute screw pair, constitute moving sets with guide rail 8-2 simultaneously.Elevator 8-3 extends clamping limb 8-4 towards the horizontal circle coil direction, and this clamping limb has sediment tube 4 clamping devices directly over being positioned at the horizontal circle hub of a spool.This sediment tube clamping device has shackle-type opening-closing lock fixed structure.In addition, on 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 the 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 usefulness 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 usefulness can not comprise sediment tube support 6-2, namely has only electromagnetic inductor 6-1.A plurality of electromagnetic induction measurement mechanisms 6 can also be set, simultaneously a plurality of samples be detected with convenient.
When carrying out magnetic powder inspection and measuring with Particle content, carry out as follows:
Step 5, gather the magnetic flaw detection ink to be measured of the same liquid medium of 100ml with the concentration sediment tube in the production scene, be placed in the 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 the disturbed magnetic field effect, make magnetic rapid uniform settling in the concentration sediment tube, obtain the smooth sample to be tested of deposition.
Present embodiment provides one to overlap measurement mechanism and the measuring method of Particle content accurately and rapidly.Can direct quantitative measure the particle content (mg/100ml) in the magnetic flaw detection ink in the concentration sediment tube, and be not subjected to non magnetic pollutant effects in the magnetic flaw detection ink, not only improved the precision that detects, simultaneously to obtaining best Particle content scope under the field working conditions in real time, instructing the precision ratio of actual production and raising defective to have vital role.Facts have proved, the measurement mechanism of present embodiment only needs 3-6 minute from being sampled to the time of determining the whole process of Particle content numerical value, detection speed and efficiency far are higher than the domestic and foreign current standard code, and namely oiliness carrier fluid precipitation 1 hour, water carrier fluid precipitation are observed magnetic subsidence volumn in the concentration sediment tube (or height) after 30 minutes.The situation of following table reflection contrast test.
Embodiment two
The magnetic powder inspection of present embodiment reflects basic structure of the present invention with the Particle content measurement mechanism, as shown in Figure 4, be mounted with the horizontal circle coil 2 of energising back formation uniform magnetic field on the gantry base 1, the top of horizontal circle coil 2 settles motor 3 by gear train driven vertical jacking gear 8.The positioned beneath energising control of horizontal circle coil 2 produces the horizontal circle coil 9 of disturbed magnetic field.Be that uniform magnetic field constitutes by radially vertical with concentration sediment tube direction of motion coaxial coil with disturbed magnetic field.Other structure and embodiment one are basic identical.
Because uniform magnetic field is made of radially vertical with concentration sediment tube direction of motion coaxial coil with disturbed magnetic field, therefore sediment tube is put into gradually the uniform magnetic field at wound coil 2 centers, relatively the magnetic field uniform motion and pass through after, can be by the disturbed magnetic field effect, make magnetic rapid uniform settling in the concentration sediment tube, obtain to deposit smooth, the consistent benchmark standard specimen of the loose dress ratio of magnetic, more convenient operation, quick.
In addition to the implementation, the present invention can also have other embodiments.For example the upper and lower coaxial horizontal circle 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, successively feed constant current and variable-current according to certain rules during operation, can successively form required uniform magnetic field and disturbed magnetic field; The electromagnetic detection instrument can the split setting; Etc..All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (10)
1. a magnetic powder inspection Particle content measurement mechanism is characterized in that: contain gantry base, be mounted with jacking gear on the described gantry base; One side of described jacking gear has on 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 the horizontal circle coil direction, and described clamping limb has the sediment tube clamping device.
2. magnetic powder inspection according to claim 1 Particle content measurement mechanism, it is characterized in that: described sediment tube clamping device is positioned at directly over the 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 horizontal circle coil below and the coaxial setting that forms uniform magnetic field or is positioned at horizontal circle coil one side that forms 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 claim 1,2,3 or 4 described magnetic powder inspection Particle content measurement mechanisms, it is characterized in that: also contain the electromagnetic detection instrument, described electromagnetic detection instrument is made up of electromagnetic induction measurement mechanism and display instrument, described electromagnetic induction measurement mechanism comprises the sediment tube support and is positioned at the electromagnetic inductor of sediment tube frame bottom, the signal input part of the described display instrument of transducing signal output termination of described electromagnetic inductor.
6. magnetic powder inspection according to claim 5 Particle content measurement mechanism, it 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 the vertical screw mandrel of motor-driven rotation, column guide rail and the elevator parallel with vertical screw mandrel; Described elevator and vertical screw mandrel constitute screw pair, and constitute moving sets with the column guide rail.
8. magnetic powder inspection according to claim 7 Particle content measurement mechanism, it is characterized in that: described elevator extends clamping limb towards the horizontal circle coil direction.
9. magnetic powder inspection according to claim 8 Particle content measurement mechanism, it is characterized in that: described sediment tube clamping device has shackle-type opening-closing lock fixed structure.
10. magnetic powder inspection according to claim 9 Particle content measurement mechanism, it is characterized in that: described electromagnetic induction measurement mechanism has two at least.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310262620.8A CN103344536B (en) | 2013-06-27 | 2013-06-27 | Magnetic suspension concentration measurement device for magnetic powder flaw detection |
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| CN201310262620.8A CN103344536B (en) | 2013-06-27 | 2013-06-27 | Magnetic suspension concentration measurement device for magnetic powder flaw detection |
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| CN103344536A true CN103344536A (en) | 2013-10-09 |
| CN103344536B CN103344536B (en) | 2015-06-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784834A (en) * | 2016-04-05 | 2016-07-20 | 共享铸钢有限公司 | Magnetic suspension solution concentration determination device capable of accelerating magnetic powder precipitation |
| CN107271338A (en) * | 2017-07-26 | 2017-10-20 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of canned oil base Particle content measuring method |
| CN108318577A (en) * | 2018-03-14 | 2018-07-24 | 权锐无损检测工程装备制造（上海）有限公司 | A kind of a wide range of reducing of magnetic powder inspection can rotation support |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108318577A (en) * | 2018-03-14 | 2018-07-24 | 权锐无损检测工程装备制造（上海）有限公司 | A kind of a wide range of reducing of magnetic powder inspection can rotation support |
| CN108318577B (en) * | 2018-03-14 | 2023-09-29 | 权锐无损检测工程装备制造（上海）有限公司 | Large-scale reducing autorotation support for magnetic particle inspection |
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