CN102854118B - Magnetic suspension concentration content calibration samples - Google Patents
Magnetic suspension concentration content calibration samples Download PDFInfo
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- CN102854118B CN102854118B CN201210334808.4A CN201210334808A CN102854118B CN 102854118 B CN102854118 B CN 102854118B CN 201210334808 A CN201210334808 A CN 201210334808A CN 102854118 B CN102854118 B CN 102854118B
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Abstract
The invention discloses a magnetic suspension concentration content calibration sample comprising an upper limit standard magnetic powder content calibration sample and a lower limit standard magnetic powder content calibration sample. The magnetic suspension concentration content calibration sample is composed of calibration samples with corresponding amounts of uniformly distributed magnetic powder, and an end handle. The main raw materials are a glue solution and corresponding amounts of magnetic powder. Proper amounts of a high-speed dispersant, a thickening agent and a defoaming agent can be added according to requirements. A preparation method comprises the three steps of raw material blending and stirring, casting, and demolding. According to the invention, a series of standard magnetic powder content calibration samples are arranged, such that an online dynamic real-time monitoring device calibration process of magnetic suspension concentration can be satisfied, calibration work accuracy and effectiveness can be improved, and standardization of magnetic suspension concentration measurement can be promoted.
Description
Technical field
The present invention relates to a kind of Dynamic Non-Destruction Measurement, particularly relate to a kind of magnetic suspension concentration content calibration sample.
Background technology
Magnetic powder inspection utilizes magnetic phenomenon to detect a kind of lossless detection method of ferrimagnet surface of the work and near surface flaw.Current magnetic powder inspection verifies as master in a wet process, mainly makes spreading agent with oil-based carrier liquid or water-based carrier fluid, is configured to magnetic flaw detection ink, then applies on the surface of the workpiece, and stray field absorption magnetic forms existence and the shape that magnetic particle indications goes out defect.The concentration of magnetic flaw detection ink directly has influence on detection sensitivity, and concentration is too low, and magnetic trace is very faint, and visual being difficult to is recognized; Concentration is too high, and background is easily fuzzy, to such an extent as to covers associated magnetic trace.Therefore, regularly carry out Particle content inspection, it is very important for making concentration maintain in a suitable degree.The concentration of magnetic flaw detection ink refers to the ratio that magnetic is shared in magnetic flaw detection ink, usually concentration is represented with the precipitation capacity (ml) of magnetic in unit magnetic flaw detection ink, usual accepted standard Particle content is: non-fluorescence magnetic flaw detection ink should containing solid magnetic precipitation 1.2 ~ 2.4ml in every 100ml, and fluorescent magnetic suspension should containing solid magnetic precipitation 0.10 ~ 0.40ml in every 100ml.In magnetic powder inspection, in magnetic flaw detection ink, concentration ratio is inaccurate, just can not carry out correct flaw detection.When concentration is crossed rare, can not carry out the display of microscopic defect, because of the absorption being accumulated in the blocked up generation magnetic of rejected region of magnetic during concentration overrich, and identification is just had any problem.In magnetic powder inspection process, along with the increase magnetic of flaw detection number of times is by consumption progressively, in order to adjust the concentration of magnetic flaw detection ink, need progressively to supplement magnetic.
At present, Particle content inspection mainly contains two kinds of methods:
1, off-line inspection, carries out Particle content inspection before testing starts.Usual employing sediment tube mensuration is that application Particle content measures pipe---i.e. magnetic sediment tube.Opening device oil pump 15 minutes, the magnetic flaw detection ink until liquid storing barrel fully stirs, evenly after, from oil gun or spray system sampling 100ml, load pears type magnetic flaw detection ink sediment tube, vertical leaving standstill is placed.Set corresponding time of repose according to different base load liquid, with reach completely precipitation till.Reading: read the magnetic deposition that pears types magnetic flaw detection ink measures pipe inner bottom part, checks magnetic flaw detection ink whether in the concentration range of regulation.Wet method is adopted to be the magnetic precipitation capacity (ml/100ml) using pears type magnetic flaw detection ink to measure pipe measuring line phase test magnetic flaw detection ink in due course as the method for testing of magnetic disperse concentration according to the magnetic concentration in " magnaflux " GB/T15822-1995 Appendix B magnetic flaw detection ink and method of testing B2 thereof.
Current this measuring method length consuming time, measuring accuracy is not high.Meanwhile, said determination method can only before detection, after carry out, in testing process due to stir a variety of causes such as uneven and Reusability cause Particle content to change time, can not Timeliness coverage.Thus, will directly have influence on the sharpness detecting defect, cause erroneous judgement to affect Detection job.
2, On line inspection, use the online dynamic realtime electromagnetic monitoring device of Particle content, its sensor is arranged on tested magnetic particle testing system jet pipe, device applies the pulse excitation signal of predetermined frequency, produce transient state alternating electromagnetic field, encourage the magnetic in tested magnetic flaw detection ink to produce secondary reflection magnetic field, device picks up this secondary reflection magnetic field, and the numerical value of the magnetic quality be processed in magnetic flaw detection ink tested with this constant volume by this secondary reflection field signal becomes the detection data of corresponding relation.When the particle content in the tested magnetic flaw detection ink of this constant volume exceeds the upper and lower limit scope of standard magnetic flaw detection ink particle content, device is reported to the police and is exported.This device can measure the concentration of magnetic flaw detection ink by Quick Measuring, for on-site on-line measurement Particle content provides a kind of well solution.
The On line inspection of Particle content is because causing Particle content to change owing to stirring a variety of causes such as uneven and Reusability by Timeliness coverage, avoid undetected, erroneous judgement and duplicate detection work, ensure the sharpness detecting defect, effectively improve Magnetic testing work effect.It is the developing direction of online Particle content monitoring.
But, in order to when ensureing to detect, the concentration of magnetic flaw detection ink maintains within the scope of standard Particle content, the process of demarcation must be had, comprise the steps: the standard magnetic flaw detection ink filling two variable concentrations values in two measure-alike standard Particle content calibration glass test tubees respectively, two variable concentrations values are respectively least concentration value and the upper concentration value of standard Particle content scope, seal standard Particle content calibration test tube after injecting.The magnetic of standard Particle content calibration test tube in the transient state alternating electromagnetic field inspiring standard particle content magnetic flaw detection ink that electromagnetic sensor produces, produce secondary reflection magnetic field, this secondary reflection field signal is processed into the detection data becoming corresponding relation with the numerical value of the known magnetic quality in this standard particle content magnetic flaw detection ink by electromagnetic detection instrument, record stores corresponding detection data, and at the electromagnetic detection instrument display corresponding detection signal figure of screen display and numerical value, arrange according to these detection data and preserve electromagnetic detection instrument software alarming threshold value.But the test tube of standard Particle content calibration in actual use exists following not enough: 1, because glass test tube is easily broken, unfavorable long-term preservation, transport and routine use management.2, the existence of glass test tube pipe thickness, must deduct the impact of thickness of pipe with electromagnetic method timing signal.3, tradition adopts water and glass container, and water easily evaporates, meanwhile, all need in each process of demarcating to standard Particle content calibrate invisible spectro magnetic flaw detection ink fully stir, evenly after can use, be unfavorable for the standardization that Particle content is demarcated and measured.4, as needed obform body moulding according to different test conditions, time, the moulding of glass test tube is comparatively difficult to implement.
Summary of the invention
In order to overcome the as above not enough of existing standard Particle content calibration test tube.The invention provides a kind of standard particle content calibration sample, this standard particle content calibration sample Simulated Water based sols, the numerical value that can not only meet the known magnetic quality in demarcation standard particle content calibration sample becomes the detection data of corresponding relation, easy to use and keeping improves detection efficiency, improve accuracy and the validity of staking-out work, and be conducive to the standardization of Particle content measurement.
The technical solution adopted for the present invention to solve the technical problems is: a kind of magnetic suspension concentration content calibration sample, comprises upper limit standard particle content calibration sample, lower limit standard particle content calibration sample.Be made up of the demarcation sample and end handle that are uniformly distributed respective amount magnetic, its primary raw material is glue and respective amount magnetic, can add appropriate high speed dispersion agent, thickening agent and defoamer as required; Because the sensitivity of magnetic improves along with the reduction of granularity, magnetic not only granularity is little and also proportion higher than glue, in mixing, magnetic is not easy to be uniformly distributed and easily to produce precipitation.High speed dispersion agent is for ensureing that magnetic disperses rapidly in glue, thoroughly, thickening agent is prevent magnetic from precipitating the distribution consistency degree affecting magnetic, and defoamer is avoid producing the numerical value that bubble affects magnetic quality in cylindrical glue rod in whipping process.Its method for making comprises the preparation of raw material and stirring, cast, the demoulding three steps.Described calibration sample volume is 100ml, corresponding particle content comprises, common magnetic upper limit standard particle content calibration sample includes the common magnetic of 2.4ml, common magnetic lower limit standard particle content calibration sample 1.2ml, MPI fluorescent magnetic particles upper limit standard particle content calibration sample includes 0.40ml MPI fluorescent magnetic particles, and MPI fluorescent magnetic particles lower limit standard particle content calibration sample includes 0.10ml MPI fluorescent magnetic particles.Described glue can be the polyurethane glue of one-component and two component, epoxy resin adhesive liquid and organosilicon glue.The structural form of described calibration sample volume can be cylindrical bar.When the structural form of described calibration sample volume is cylindrical bar, the length of cylindrical bar
haccording to formula
determine, unit is mm, and the radius r of cylindrical bar arranges the dimension of specification according to the caliber specification of tested magnetic particle testing system jet pipe, form series according to arranging specification.End handle is cylindrical, and the specification of end handle is identical with described cylindrical bar, the material of end handle be not containing magnetic with described cylindrical bar homogeneous material, end handle is fixed on side, described cylindrical bar end.
Its method for making comprises the preparation of raw material and stirring, cast, the demoulding three steps; First magnetic and high speed dispersion agent are mixed in high-speed stirred, in whipping process, add glue, defoamer, then continue again after slowly adding thickening agent to stir; Be coat release agent in columniform mould at inner chamber, glue be cast in mould to the 100ml needed for calibration sample volume, when glue liquid level tentatively solidifies, glue liquid level adds not containing the homogeneity glue of magnetic as end handle; When glue reaches demoulding strength, standard particle content calibration sample is taken out.
The invention has the beneficial effects as follows, the standard particle content calibration sample of series is set, while meeting the calibration process of online dynamic realtime monitoring device of Particle content, accuracy and the validity of staking-out work can be improved, and is conducive to the standardization of Particle content measurement.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the standard particle content calibration sample front elevation of the embodiment of the present invention.
Sectional structural map when Fig. 2 is the cast of the embodiment of the present invention.
In figure, 1. standard particle content calibration sample, 2. cylindrical bar, 3. end handle, 4. mould, 5. glue, 6. glue liquid level.
Embodiment
In the embodiment shown in fig. 1, when the structural form of described a kind of magnetic suspension concentration content calibration sample (1) volume is cylindrical bar (2), the length of cylindrical bar (2)
haccording to formula
determine, unit is mm, and the radius r of cylindrical bar (2) arranges the dimension of specification according to the caliber specification of tested magnetic particle testing system jet pipe, form series according to arranging specification.End handle (3) is for cylindrical, the specification of end handle 3 is identical with described cylindrical bar (2), the material of end handle (3) be not containing magnetic with described cylindrical bar (2) homogeneous material, end handle (3) is fixed on described cylindrical bar (2) side, end.
In the embodiment depicted in figure 2, its method for making comprises the preparation of raw material and stirring, cast, the demoulding three steps; First magnetic and high speed dispersion agent are mixed in high-speed stirred, in whipping process, add glue, defoamer, then continue again after slowly adding thickening agent to stir; Be coat release agent in columniform mould (4) at inner chamber, glue (5) is cast in mould (4) interior to the 100ml needed for calibration sample volume, when glue liquid level (6) tentatively solidifies, do not contain the homogeneity glue (5) of magnetic as end handle (3) in the upper interpolation of glue liquid level (6); When glue (5) reaches demoulding strength, standard particle content calibration sample (1) is taken out.
Should be appreciated that without departing from the scope of the present invention, multiple change can be made to above-described embodiment.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a magnetic suspension concentration content calibration sample, comprise upper limit standard particle content calibration sample, lower limit standard particle content calibration sample, it is characterized in that: be made up of the demarcation sample and end handle that are uniformly distributed respective amount magnetic, its primary raw material is glue and respective amount magnetic, adds appropriate high speed dispersion agent, thickening agent and defoamer; Its method for making comprises the preparation of raw material and stirring, cast, the demoulding three steps.
2. a kind of magnetic suspension concentration content calibration sample according to claim 1, it is characterized in that: described calibration sample volume is 100ml, corresponding particle content comprises, common magnetic upper limit standard particle content calibration sample includes the common magnetic of 2.4ml, common magnetic lower limit standard particle content calibration sample 1.2ml, MPI fluorescent magnetic particles upper limit standard particle content calibration sample includes 0.40ml MPI fluorescent magnetic particles, and MPI fluorescent magnetic particles lower limit standard particle content calibration sample includes 0.10ml MPI fluorescent magnetic particles.
3. a kind of magnetic suspension concentration content calibration sample according to claim 1, is characterized in that: described glue can be the polyurethane glue of one-component and two component, epoxy resin adhesive liquid and organosilicon glue.
4. a kind of magnetic suspension concentration content calibration sample according to claim 1, is characterized in that: the structural form of described calibration sample volume can be cylindrical bar.
5. a kind of magnetic suspension concentration content calibration sample according to claim 4, is characterized in that: when the structural form of described calibration sample volume is cylindrical bar, the length of cylindrical bar
haccording to formula
determine, unit is mm, and the radius r of cylindrical bar arranges the dimension of specification according to the caliber specification of tested magnetic particle testing system jet pipe, form series according to arranging specification.
6. a kind of magnetic suspension concentration content calibration sample according to claim 5, it is characterized in that: end handle is cylindrical, the specification of end handle is identical with described cylindrical bar, the material of end handle be not containing magnetic with described cylindrical bar homogeneous material, end handle is fixed on side, described cylindrical bar end.
7. a kind of magnetic suspension concentration content calibration sample according to claim 1,4,5 any one, is characterized in that: its method for making comprises the preparation of raw material and stirring, cast, the demoulding three steps; First magnetic and high speed dispersion agent are mixed in high-speed stirred, in whipping process, add glue, defoamer, then continue again after slowly adding thickening agent to stir; Be coat release agent in columniform mould at inner chamber, glue be cast in mould to the 100ml needed for calibration sample volume, when glue liquid level tentatively solidifies, glue liquid level adds not containing the homogeneity glue of magnetic as end handle; When glue reaches demoulding strength, standard particle content calibration sample is taken out.
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| CN105527337A (en) * | 2014-09-28 | 2016-04-27 | 宝山钢铁股份有限公司 | Measurement apparatus and measurement method for magnetic suspension concentration |
| CN105823822B (en) * | 2015-01-07 | 2018-11-06 | 宝山钢铁股份有限公司 | Magnetic flaw detection ink usability evaluation method for magnetic powder inspection non-destructive testing |
| CN106872915B (en) * | 2017-01-11 | 2019-09-13 | 中车戚墅堰机车车辆工艺研究所有限公司 | Particle content monitoring method during flaw detection |
| CN107271338B (en) * | 2017-07-26 | 2020-06-02 | 中车戚墅堰机车车辆工艺研究所有限公司 | Method for measuring concentration of canned oil-based magnetic suspension |
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| CN101109689A (en) * | 2007-07-06 | 2008-01-23 | 天津大学 | Polymer particulate suspending liquid and preparing method thereof |
| CN101113971A (en) * | 2007-08-31 | 2008-01-30 | 天津钢管集团股份有限公司 | Roll processing flaw detecting method |
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| JPS566154A (en) * | 1979-06-28 | 1981-01-22 | Nippon Seiko Kk | Magnetic inspecting method |
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| US4701275A (en) * | 1986-09-17 | 1987-10-20 | Circle Chemical Company, Inc. | Testing system |
| CN101109689A (en) * | 2007-07-06 | 2008-01-23 | 天津大学 | Polymer particulate suspending liquid and preparing method thereof |
| CN101113971A (en) * | 2007-08-31 | 2008-01-30 | 天津钢管集团股份有限公司 | Roll processing flaw detecting method |
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