CN107102277B - A kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture - Google Patents
A kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture Download PDFInfo
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- CN107102277B CN107102277B CN201710199117.0A CN201710199117A CN107102277B CN 107102277 B CN107102277 B CN 107102277B CN 201710199117 A CN201710199117 A CN 201710199117A CN 107102277 B CN107102277 B CN 107102277B
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- main frame
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- active chuck
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/123—Measuring loss due to hysteresis
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of dismountable multi gear elastic stress monolithic method magnetism testing fixtures, including main frame, main frame cover board, the strap positioned at sample end and active chuck and ambulatory splint, spring base, compressed spring；Main frame is provided with multiple and different pilot holes, and the stiffness factor for assembling pitch of holes and compressed spring matches；Left side main frame and right side main frame are penetrated from the two sides of sample set-down location, pass through the bolt fastening of front end, lower main frame is assembled in end by different bolt hole and left side main frame and right side main frame, sample one end is at the front end of the left side main frame and the right side main frame, the sample other end is clamped by bolt presses, ambulatory splint and active chuck using strap；Active chuck end passes through lower main frame and the spring base assembles.The present invention conveniently realizes the load of the elastic stress of multiple levels, is clamped sample end by frictional force, does not need in the aperture of sample end, more convenient.
Description
Technical field
The present invention relates to ferromagnetic material magnetism testing technical field more particularly to a kind of dismountable multi gear elasticity
Stress monolithic method magnetism testing fixture carries out the fixture of monolithic method magnetism testing, characterizes residual stress with elastic stress
Influence to sample magnetic property.
Background technique
Energy-saving and environmental protection are one of the themes of world today's automobile industry development.As motor is wide on new-energy automobile
General application, core element motor stator, rotor electromagnetic performance receive more and more attention.Motor stator is in outside alternation
In magnetic field, the variation of magnetized magnetic induction density B can lag behind the variation of external magnetic field strength H, that is, usually said magnetic
Stagnant phenomenon.From the perspective of energy, the presence of hysteresis is the consumption of energy actually, therefore, Accurate Prediction ferromagnetic material
The magnetic hystersis loss of especially silicon steel equimagnetic performance components is one of the major issue of current academia and engineering circles concern.
The key of prediction magnetic hystersis loss is magnetization curve-BH curve of accurate description material, the classics based on physics
Jile-Atherton magnetic hysteresis theory can preferably describe the magnetization curve of ideal ferromagnetic material.Experimentally, monolithic method is current
One of most common test method, test philosophy substantially magnetic vibrating feeder yoke and sample constitute circuit, the excitation wound on sample
Coil leads to the alternating current of certain frequency, generates alternating magnetic field, since the magnetic resistance of magnetic vibrating feeder yoke is far smaller than the magnetic resistance of air,
Magnetic flux almost all passes through magnetic vibrating feeder yoke.Meanwhile there is test coil in the position close to specimen surface, it is strong that external magnetic field is tested respectively
Spend H and magnetic induction density B.And for actual motor stator, in the fabrication process, the residual stress of introducing is for magnetic hystersis loss
There is very big influence, it is way most general at present that residual stress is characterized with elastic stress.It can be although existing at present
Line tests the test method containing residual stress, but still has some problems: on the one hand, on-line testing equipment is usually only
The range of 50-70MPa, and the residual stress that actual electrical sheet punching introduces is up to 200-300MPa, so general online
Test equipment is not able to satisfy our test needs；On the other hand, on-line testing equipment is usually relatively complex, with high costs.Cause
This design is suitble to the fixture of elastic pulling force that monolithic method simple to operation tests, can applying different level extremely to have
It is necessary.
By the retrieval discovery to existing patent, there is not temporarily related suitable monolithic method test to be capable of providing different level at present
Elastic stress fixture.Needing to develop a kind of using monolithic method test equipment and can realize the magnetism of multilevel elastic stress
It can test method.How to adapt to structure relatively complicated inside monolithic method test equipment, how fast and convenient realization is multiple
The constant load of horizontal elastic stress is the emphasis of our fixture design concerns.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to provide a kind of dismountable multi gear elastic stress monolithic method magnetic
Performance test fixture applies the tensile stress of different level, answers to obtain containing only remnants on the basis of the test of electrical sheet monolithic method
The magnetization curve of the monolithic electrical steel sample of power, to carry out influence of the research residual stress for magnetic hystersis loss.Simultaneously because
The in-built limitation of monolithic method test equipment, designed fixture need to be made into detachable, facilitate test.
To achieve the above object, the present invention is realized according to following technical scheme:
A kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture, including main frame, main frame cover board, position
In the strap and active chuck and ambulatory splint of sample end, spring base, compressed spring.
Wherein, the main frame is split as left side main frame, right side main frame, lower main frame, and the main frame is provided with
Multiple and different pilot holes, the spacing of the pilot hole and the stiffness factor of the compressed spring match；The main frame in left side
Frame and the right side main frame are penetrated from the two sides of the sample set-down location of monolithic method test equipment, by the bolt fastening of front end,
The lower main frame is assembled together in end by different bolts hole and the left side main frame and right side main frame, described
Bolt pitch of holes is greater than the width of sample.
One end of sample is logical using the strap at the front end of the left side main frame and the right side main frame
Bolt presses are crossed, the ambulatory splint and the active chuck clamp the other end of sample；The end of the active chuck passes through
The lower main frame and the spring base assemble.
In above-mentioned technical proposal, the active chuck along the left side main frame and the right side main frame side
Track sliding, after opposite direction screws out bolt, compressed compressed spring will push spring base, and then pass through the activity
Collet applies elastic stress along the length direction of sample.
In above-mentioned technical proposal, the seal face of the active chuck and the left side main frame and the right side main frame
The seal face of front end is in the same plane.
In above-mentioned technical proposal, two springs being arranged between spring base and lower main frame are pressed by bolt
Contracting, until the end of the active chuck and spring base contact, the end face of sample contacts the side of the active chuck.
In above-mentioned technical proposal, the center line of two springs is in sample plane, and heart line two sides in the sample
It is symmetric.
Compared with prior art, the present invention having the following beneficial effects:
The present invention be it is detachable, can easily apply on monolithic method test equipment, synchronize to carry out containing only remnants and answer
The electromagnetic performance of power is tested.
The present invention can more easily realize the load of the elastic stress of multiple levels, and the calculating of elastic stress is logical
Decrement and its stiffness factor of spring is crossed to realize, it is more convenient compared to other equipment.
The loading force of elastic stress of the invention in sample planar along the length direction of sample, avoid lateral
The influence of frictional force.
The present invention is clamped sample end by frictional force, is not needed in the aperture of sample end, more convenient.
The present invention is suitble to the test of the electrical sheet thin slice of different-thickness.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the present invention and monolithic method test equipment scheme of installation；
Fig. 2 is whole assembly structure figure of the invention；
Fig. 3 is main frame front end scheme of installation of the invention；
Fig. 4 is main frame multiple groups pilot hole schematic diagram of the invention；
Fig. 5 is active chuck and guide rail relative position figure of the invention；
Fig. 6 is sample and active chuck side relative position figure of the invention；
Fig. 7 is that sample end of the invention clamps schematic diagram；
Fig. 8 is spring-compressed of the invention and force system diagram；
In figure: main frame on the left of 1-；Main frame on the right side of 2-；Main frame under 3-；4- main frame cover board；5- active chuck；6-
Spring base；7- ambulatory splint；8- strap；9- monolithic method test equipment；10- sample.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
Fig. 1 is the present invention and monolithic method test equipment scheme of installation, and Fig. 2 is whole assembly structure figure of the invention；This
Invention is a kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture, including main frame, main frame cover board 4, position
Strap 8 and active chuck 5 and ambulatory splint 7, spring base 6, compressed spring etc. in sample end.
Fig. 3 is main frame front end scheme of installation of the invention；As shown in figure 3, main frame be split as left side main frame 1,
Right side main frame 2, lower main frame 3, the main frame are provided with multiple and different pilot holes；The left side main frame 1 and described
Right side main frame 2 is penetrated from the two sides of the sample set-down location of monolithic method test equipment 9, by the bolt fastening of front end, lower main frame
Frame 3 is assembled together by different bolts hole with the left side main frame 1 and right side main frame 2 in end.The main frame of fixture
Frame is split as three parts, passes through assembled from sample both ends for convenience, during the test, and pass through main frame
Difference assembles length to realize the load of the elastic stress of different level.The spacing of the different pilot holes of main frame should be with spring
Stiffness factor match, to reach suitable stress level.
Fig. 4 is main frame multiple groups pilot hole schematic diagram of the invention；As shown in figure 4, the elasticity of the different level of fixture is answered
The application of power is also the different pilot holes by main frame to realize.Different pilot holes can change final after spring release
Length, the elastic stress of Lai Shixian different level.
Fig. 5 is active chuck and guide rail relative position figure of the invention, as shown in figure 5, active chuck 5 can be along main frame
The guide rail of 2 side of left side main frame 1 and right side main frame of frame slides, and ensure that the load of elastic stress in sample plane simultaneously
And along the length direction of sample.After opposite direction screws out stay bolt, compressed spring will push spring base 6, in turn
Apply an elastic stress along the length direction of sample by active chuck 5.Bolt can also play limit guidance to spring and make
With.
Fig. 6 is sample and active chuck side relative position figure of the invention；10 specification of sample that the present invention uses for
140*30mm2, than national standard sample 100*30mm2Long 40mm, front and back end difference is remaining out after sample 10 is put into monolithic method test equipment 9
20mm.One end of sample 10 uses the strap 8 at the front end of the left side main frame 1 and the right side main frame 2
By bolt presses, the other end of the ambulatory splint 7 and the clamping sample 10 of the active chuck 5；The active chuck 5
End passes through the lower main frame and the spring base 6 assembles.
Fig. 7 is that sample end of the invention clamps schematic diagram；As shown in fig. 7, experiment sample preparation for convenience, clamp bolt hole
Spacing is greater than the width of sample 10, achievees the effect that clamping by frictional force, does not need trying when clamping sample
Aperture is carried out on sample.It is not especially greatly that the bolt of nominal diameter 3-4mm is capable of providing since fixture needs power to be achieved
Enough pressing forces realize certain frictional force.
Heart line two sides are in symmetrical to the center line of two springs of the present invention in sample plane, and in the sample
Distribution, it is ensured that during load, excessive side-friction force will not be generated.The stiffness factor of spring is in advance in simple tension
Calibration force-displacement curve is carried out on testing machine, it is big come the loading force for determining that fixture provides by the length after measurement spring release
It is small.
Fig. 8 is spring-compressed of the invention and force system diagram；As shown in figure 8, will be arranged by bolt in spring base 6
Two springs between lower main frame 3 are compressed, until spring base 6 and active chuck end just contact, at this time
Ensure that the end face of sample 10 just contacts the side of active chuck 5.First by the end of spring base 6 and active chuck 5, by tight
Fixing bolt links together, and is then clamped the other end of sample with ambulatory splint 7 and active chuck.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (5)
1. a kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture, which is characterized in that including main frame, main frame
Frame cover board (4), the strap (8) positioned at sample end and active chuck (5) and ambulatory splint (7), spring base (6), pressure
Contracting spring；
Wherein, the main frame is split as left side main frame (1), right side main frame (2), lower main frame (3), and the main frame is set
It is equipped with multiple and different pilot holes, the spacing of the pilot hole and the stiffness factor of the compressed spring match；The left side
Main frame (1) and the right side main frame (2) are penetrated from the two sides of the sample set-down location of monolithic method test equipment (9), by preceding
The bolt fastening at end, the lower main frame (3) pass through different bolts hole and the left side main frame (1) and right side master in end
Frame (2) is assembled together；
One end of sample (10) uses the fixation at the front end of the left side main frame (1) and the right side main frame (2)
Clamping plate (8) is used for by bolt presses, the other end of the ambulatory splint (7) and the active chuck (5) clamping sample (10)
The bolt pitch of holes for clamping sample is greater than the width of sample (10)；The end of the active chuck (5) passes through the lower main frame
Frame and the spring base (6) are assembled.
2. a kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture according to claim 1, feature
It is, the active chuck (5) is sliding along the track of the left side main frame (1) and the side of the right side main frame (2)
It is dynamic, two springs being arranged between spring base (6) and lower main frame (3) are compressed by bolt, until the activity
The end of collet (5) and the spring base (6) contact, the end face of sample (10) contacts the side of the active chuck (5), when anti-
After direction screws out the bolt of compressed spring, compressed compressed spring will push spring base (6), and then pass through the activity
Collet (5) applies elastic stress along the length direction of sample (10).
3. a kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture according to claim 2, feature
It is, the seal face and the left side main frame (1) of the active chuck (5) and the pressure of the right side main frame (2) front end
Tight face is in the same plane.
4. a kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture according to claim 1, feature
It is, is compressed two springs being arranged between spring base (6) and lower main frame (3) by bolt, until the work
The end of dynamic collet (5) and the spring base (6) contact, the end face of sample (10) contact the side of the active chuck (5).
5. a kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture according to claim 4, feature
It is, the center line of two springs is symmetric in sample (10) plane, and in sample (10) center line two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199117.0A CN107102277B (en) | 2017-03-29 | 2017-03-29 | A kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199117.0A CN107102277B (en) | 2017-03-29 | 2017-03-29 | A kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture |
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| Publication Number | Publication Date |
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| CN107102277A CN107102277A (en) | 2017-08-29 |
| CN107102277B true CN107102277B (en) | 2019-11-19 |
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| CN201710199117.0A Active CN107102277B (en) | 2017-03-29 | 2017-03-29 | A kind of dismountable multi gear elastic stress monolithic method magnetism testing fixture |
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| CN112986874B (en) * | 2021-02-07 | 2022-11-01 | 河北工业大学 | Single-chip magnetic property measuring device based on space orthogonal triaxial stress loading condition |
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2017
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| DD285425A5 (en) * | 1989-06-29 | 1990-12-12 | Veb Transformatoren- Und Roentgenwerk "H. Matern",Dd | DEVICE FOR TESTING MAGNETIC SHEETS FOR MAGNETIC KNOWLEDGE |
| JP2012141203A (en) * | 2010-12-28 | 2012-07-26 | Jfe Steel Corp | Veneer magnetism tester and magnetic characteristic measuring method of magnetic steel sheet using the same |
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| CN204302473U (en) * | 2014-11-14 | 2015-04-29 | 武汉钢铁(集团)公司 | The afterburning magnetizing assembly in a kind of electrical sheet side |
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