CN110160693A - The measuring method of orientation silicon steel magnetic core resin solidification stress - Google Patents
The measuring method of orientation silicon steel magnetic core resin solidification stress Download PDFInfo
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- CN110160693A CN110160693A CN201910610792.7A CN201910610792A CN110160693A CN 110160693 A CN110160693 A CN 110160693A CN 201910610792 A CN201910610792 A CN 201910610792A CN 110160693 A CN110160693 A CN 110160693A
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- magnetic core
- silicon steel
- orientation silicon
- air gap
- stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- General Physics & Mathematics (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a kind of measuring methods of orientation silicon steel magnetic core resin solidification stress, the establishment of magnetic core solidification internal stress measuring method of the invention, the consistency for advantageously ensuring that magnetic core performance has practical significance for the quality and reliability that improve downstream product sensor；Can be in producing line front end using this method, i.e., the magnetic core production phase finds the bad of components in time and is controlled, and finished product is avoided to cause greater loss because Stress in Magnetic Core is bad；The stress parameters that solidified resin can quickly be obtained according to the present invention, considerably increase accuracy and convenience in low stress Choice of Resin.
Description
Technical field
The present invention relates to a kind of measuring methods of orientation silicon steel magnetic core resin solidification stress.
Background technique
Kernel component one of of the orientation silicon steel magnetic core as current sensor, manufacture craft include resin impregnated with
Heat curing processes.And in curing process, because cure shrinkage necessarily makes magnetic core generate internal stress, internal stress causes resin
The reduced performance of magnetic permeability etc..
Solidification internal stress needs to be verified at the finished product end of sensor to the influence degree of magnetic core performance, can generate so such as
Lower problem: the product as caused by magnetic core solidification internal stress is bad to be occurred to cause greater loss, while also influencing in finished parts terminal
To the consistency of performance etc. of sensor.Therefore a kind of undesirable detection side for finding components in time in the magnetic core production phase is needed
Case.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of measuring method of orientation silicon steel magnetic core resin solidification stress, with
Orientation silicon steel magnetic core is solved in magnetic core production phase internal stress test problems.
Technical solution: the measuring method of orientation silicon steel magnetic core resin solidification stress of the present invention, comprising the following steps:
Step 1, the magnetic core after taking heat cure records the outer diameter R of magnetic core as sample；
Step 2, cutting tool is chosen, and records the thickness G of the cutting sheet of cutting tool ', and magnetic core is fixed on cutting
On tool, cutting tool carries out air gap cutting to magnetic core；
Step 3, magnetic core is removed, and measures width of air gap G using measuring tool；
Step 4, the width of air gap G of magnetic core and the thickness G of cutting sheet are calculated ' poor Δ G=G-G ', the magnetic core after heat cure
Stress coefficient be λ=Δ G/R ‰, wherein orientation silicon steel magnetic core of the λ less than 1 be qualified product, remaining is defective products.
The utility model has the advantages that the establishment of magnetic core solidification internal stress measuring method of the invention, advantageously ensures that the consistent of magnetic core performance
Property, there is practical significance for the quality and reliability that improve downstream product sensor；Using this method can in producing line front end,
I.e. the magnetic core production phase finds the bad of components in time and is controlled, and finished product is avoided to cause because Stress in Magnetic Core is bad
Greater loss；The stress parameters that solidified resin can quickly be obtained according to the present invention, considerably increase in low stress Choice of Resin
On accuracy and convenience.
Specific embodiment
The orientation silicon steel magnetic core of 5 internal diameter 20mm outer diameter 28mm height 5mm is made, magnetic core first is rolled up by grain-oriented Si steel sheet
Circle is made, reference table 1 after being then impregnated with one hour using acrylic resin, is put into baking oven and is solidified 2 hours at 170 DEG C.
To the magnetic core after solidification, air gap processing is carried out using metallographical cutter with the alloy blade with a thickness of 2mm, and when cutting, use is cold
But liquid cools down to air gap cut place.And with digital vernier calliper to measure width of air gap, width of air gap measurement repeatedly, and is taken
Between be worth or average value as width of air gap value.Exemplar using method of the invention, after solidifying to 5 via acrylic resin
Stress test is carried out, measurement result is summarized in the following table 2.
1. acrylic resin explanation of table
| Resin title | The trade mark | Main component | Viscosity |
| One-component acrylic resin | V-101 | Acrylic resin | 50mPa·s |
2. Stress in Magnetic Core of table tests table (acrylic resin solidification)
| Sample number | Φ | G’ | G | ΔG | λ | As a result |
| 1 | 28.0 | 2.00 | 2.02 | 0.02 | 0.7 | It is qualified |
| 2 | 28.0 | 2.00 | 2.01 | 0.01 | 0.4 | It is qualified |
| 3 | 28.0 | 2.00 | 2.03 | 0.01 | 0.4 | It is qualified |
| 4 | 28.0 | 2.00 | 2.02 | 0.02 | 0.7 | It is qualified |
| 5 | 28.0 | 2.00 | 2.03 | 0.01 | 0.4 | It is qualified |
The said goods are subjected to the test of finished product end final performance, test result is consistent with the result in table 2.
Same method makes 5 identical magnetic cores, and reference table 3 is put into baking oven after being impregnated with one hour using epoxy resin
Solidify 2 hours at 170 DEG C.It repeats above-mentioned test and test process, measurement result is summarized in the following table 4.
3. epoxy resin explanation of table
| Resin title | The trade mark | Main component | Viscosity |
| Single component epoxy | TB2230 | Epoxy resin | 120mPa·s |
4. Stress in Magnetic Core of table tests table (epoxy resin cure)
| Sample number | Φ | G’ | G | ΔG | λ | As a result |
| 1 | 28 | 2.0 | 2.03 | 0.03 | 1.1 | It is unqualified |
| 2 | 28 | 2.0 | 2.04 | 0.04 | 1.4 | It is unqualified |
| 3 | 28 | 2.0 | 2.03 | 0.03 | 1.1 | It is unqualified |
| 4 | 28 | 2.0 | 2.02 | 0.02 | 0.7 | It is qualified |
| 5 | 28 | 2.0 | 2.03 | 0.03 | 1.1 | It is unqualified |
The said goods are subjected to the test of finished product end final performance, test result is consistent with the result in table 2.
Therefore, acrylic resin and epoxy resin and other low stress resins be can be in Choice of Resin.
It can find through this embodiment, different resins solidification internal stress coefficient has larger difference, acrylic resin solidification effect
Fruit is significantly better than epoxy resin.In practical applications, suitable low stress resin can be found and selected according to this method.
It is resisted in addition, the outer diameter scale difference of magnetic core can show different stress.It is shown when magnetic core outer diameter is smaller
Biggish external force is resisted, i.e., air gap caused by heat cure is shunk smaller to the reaction of stress coefficient.On the contrary when magnetic core outer diameter is larger
When, it shows lesser stress and resists, i.e., it is more sensitive to the reaction of stress coefficient.Stress coefficient of the invention is appropriate only for outer
Diameter between 20~100mm orientation silicon steel magnetic core stress test, and be more than this external diametrical extent magnetic core in Hall current, electricity
Pressure sensor field can be used as research direction from now on using less.
Claims (5)
1. a kind of measuring method of orientation silicon steel magnetic core resin solidification stress, it is characterised in that the following steps are included:
Step 1, the magnetic core after taking heat cure records the outer diameter R of magnetic core as sample；
Step 2, cutting tool is chosen, and records the thickness G of the cutting sheet of cutting tool ', and magnetic core is fixed on cutting tool
On, cutting tool carries out air gap cutting to magnetic core；
Step 3, magnetic core is removed, and measures width of air gap G using measuring tool；
Step 4, the width of air gap G of magnetic core and the thickness G of cutting sheet are calculated ' poor Δ G=G-G ', magnetic core after heat cure answers
Force coefficient is λ=Δ G/R ‰, and wherein orientation silicon steel magnetic core of the λ less than 1 is qualified product, remaining is defective products.
2. the measuring method of orientation silicon steel magnetic core resin solidification stress according to claim 1, it is characterised in that in step 1
In, magnetic core is that grain-oriented Si steel sheet rolls into round magnetic core, and magnetic core is Hall current sensor or Hall voltage sensor
Components.
3. the measuring method of orientation silicon steel magnetic core resin solidification stress according to claim 2, it is characterised in that magnetic core
Outer diameter is 20-100mm.
4. the measuring method of orientation silicon steel magnetic core resin solidification stress according to claim 1, it is characterised in that in step 2
In, when cutting sheet carries out air gap cutting to magnetic core, coolant liquid cools down to air gap cut place.
5. the measuring method of orientation silicon steel magnetic core resin solidification stress according to claim 2, it is characterised in that in step 3
In, width of air gap measurement repeatedly, and takes median or average value as width of air gap value.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0126806A1 (en) * | 1983-05-28 | 1984-12-05 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Magnetic head |
| CN1050108A (en) * | 1989-09-03 | 1991-03-20 | 首钢冶金研究所 | Making method of cutting amorphous inductive magnetic core |
| CN1069823A (en) * | 1991-12-29 | 1993-03-10 | 首都钢铁公司 | Production of amorphous magnetic core for magnetic-compensation Hall current sensor |
| CN1082192A (en) * | 1993-05-04 | 1994-02-16 | 西安冶金建筑学院 | The measuring method of thin plate unrelieved stress |
| CN102183458A (en) * | 2010-12-30 | 2011-09-14 | 北京理工大学 | Method and system for measuring residual stresses |
| CN102969140A (en) * | 2012-06-29 | 2013-03-13 | 横店集团东磁股份有限公司 | EI-type magnetic core production method and air gap cutting equipment |
| CN103940534A (en) * | 2014-04-02 | 2014-07-23 | 西安近代化学研究所 | Strain gauge assembly for testing curing stress of thermosetting pouring PBX and testing method thereof |
| CN105928945A (en) * | 2016-04-18 | 2016-09-07 | 北京航空航天大学 | Heating stress releasing based method for measuring interior deformation of three-dimensional body |
| CN109142057A (en) * | 2018-09-11 | 2019-01-04 | 北京工业大学 | The Barkhausen noise non-destructive measuring method and system of ferrimagnet local stress and strain field |
| CN109870258A (en) * | 2019-01-28 | 2019-06-11 | 浙江工业大学 | A kind of instrumentation spherical shape indentation detection method of any residual stress of plane |
-
2019
- 2019-07-08 CN CN201910610792.7A patent/CN110160693A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0126806A1 (en) * | 1983-05-28 | 1984-12-05 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Magnetic head |
| CN1050108A (en) * | 1989-09-03 | 1991-03-20 | 首钢冶金研究所 | Making method of cutting amorphous inductive magnetic core |
| CN1069823A (en) * | 1991-12-29 | 1993-03-10 | 首都钢铁公司 | Production of amorphous magnetic core for magnetic-compensation Hall current sensor |
| CN1082192A (en) * | 1993-05-04 | 1994-02-16 | 西安冶金建筑学院 | The measuring method of thin plate unrelieved stress |
| CN102183458A (en) * | 2010-12-30 | 2011-09-14 | 北京理工大学 | Method and system for measuring residual stresses |
| CN102969140A (en) * | 2012-06-29 | 2013-03-13 | 横店集团东磁股份有限公司 | EI-type magnetic core production method and air gap cutting equipment |
| CN103940534A (en) * | 2014-04-02 | 2014-07-23 | 西安近代化学研究所 | Strain gauge assembly for testing curing stress of thermosetting pouring PBX and testing method thereof |
| CN105928945A (en) * | 2016-04-18 | 2016-09-07 | 北京航空航天大学 | Heating stress releasing based method for measuring interior deformation of three-dimensional body |
| CN109142057A (en) * | 2018-09-11 | 2019-01-04 | 北京工业大学 | The Barkhausen noise non-destructive measuring method and system of ferrimagnet local stress and strain field |
| CN109870258A (en) * | 2019-01-28 | 2019-06-11 | 浙江工业大学 | A kind of instrumentation spherical shape indentation detection method of any residual stress of plane |
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Application publication date: 20190823 |