CN105097357A - Process for manufacturing a magnetic part of a differential relay comprising a surface treatment by shot-peening - Google Patents
Process for manufacturing a magnetic part of a differential relay comprising a surface treatment by shot-peening Download PDFInfo
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- CN105097357A CN105097357A CN201510226841.9A CN201510226841A CN105097357A CN 105097357 A CN105097357 A CN 105097357A CN 201510226841 A CN201510226841 A CN 201510226841A CN 105097357 A CN105097357 A CN 105097357A
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- 238000005480 shot peening Methods 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 238000004381 surface treatment Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 65
- 230000008569 process Effects 0.000 title description 28
- 230000035945 sensitivity Effects 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000000956 alloy Substances 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 239000011325 microbead Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 12
- 239000012530 fluid Substances 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
- 229910001573 adamantine Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000002847 impedance measurement Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/081—Magnetic constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacture Of Motors, Generators (AREA)
- Soft Magnetic Materials (AREA)
Abstract
A method of manufacturing a magnetic part (15, 17) of a differential relay (5) with high sensitivity comprises performing a surface treatment step of shot peening on at least one portion of a surface of the magnetic piece (15 , 17). The surface treatment step of shot peening comprises projecting pressure microbeads on the surface portion.
Description
Technical field
The present invention relates to a kind of method of the magnetic part for the manufacture of high sensitivity differential relay.
The present invention is applied particularly to the manufacture of differential protection switch or circuit breaker.
When such differential switch or circuit breaker are designed to by breaking down on primary circuit, personal security protected by fast shut-off primary circuit.Especially, the differential circuit breaker of " prospective current " type is made up of faulty circuit detector, high sensitivity differential relay and the mechanism for disconnecting primary circuit.
Background technology
Differential relay comprises magnetic circuit, and this magnetic circuit comprises two magnetic parts, i.e. moving vane and stationary armature.
When primary circuit breaks down, fault current detection device can send the signal of telecommunication to differential relay.Differential relay is in response to the signal of telecommunication, and differential relay disconnects by making blade rotate relative to armature, and the release mechanism of armature setting primary circuit is movable.
The magnetic part of differential relay is made up of non-retentive alloy, and the feature of non-retentive alloy is high saturated magnetic induction, low coercive field strength and relatively high resistivity.Such feature ensure that differential relay correctly works.
In order to meet desired magnetic characteristic condition, the magnetic alloy of known use such as iron and nickel and so on manufactures the magnetic part of magnetic circuit, this alloy such as comprises 46wt% (mass fraction) to 49wt% and is especially the nickel of 48wt%, all the other impurity being iron and producing in manufacturing.To be saturation induction density Bs be 1.5Tesla (tesla) to the advantage of this alloy and coercive field strength Hc is 4A/m.
The magnetic part manufactured thus then can stand moist atmospheric conditions, moist atmospheric conditions cause following risk: the iron in alloy and corrode between nickel to form iron oxide and super iron oxide, thus cause triggering differential relay too early, or blade is made to stick on armature on the contrary.
In addition, the continuous contact between blade and armature can cause these parts concentrated wear and distortion, thus causes the incorrect work of differential relay.
In general, the hardness lower (close to 120HV) of the magnetic alloy based on nickel used and abrasion resistance is lower.In addition, these nickel alloys are not stainless, and the corrosion-resistant degree deficiency under the service condition of relay.
Thus, proposed the hardness and the abrasion resistance that improve these surfaces by making metal coating on the contact surface of the magnetic part of relay, metal coating also increases the corrosion-resistant degree of contact surface.These metal coatings are such as gold, chromium or adamantine deposit.
But this technical costs is very high.
Proposed to be encapsulated in by differential relay in fluid-tight plastic casing, this plastic casing can protect magnetic circuit from corrosion.But this technology cannot solve the problem relevant to the wearing and tearing of magnetic circuit.
Summary of the invention
An object of the present invention is to solve these defects and be provided for manufacturing the method for magnetic part of differential relay, magnetic part has good abrasion resistance, and differential relay is more cheap according to the method for prior art than implementing.
For this reason, the present invention relates to the method for the above-mentioned type, described manufacture method comprises the surface treatment carrying out shot-peening processing at least partially on the surface to affiliated magnetic part, and described shot-peening finished surface treatment step comprises and being projected in described surface portion by pressurization microballon.
According to other aspects of the invention, what manufacture method comprised in following characteristics is one or more:
Described magnetic part is armature or the blade of magnetic circuit;
Described parts are made up of Fe-Ni alloy/C, and Fe-Ni alloy/C comprises the nickel of 46wt% to 49wt%, all the other impurity being iron and producing in manufacturing;
Described microballon is glass, pottery or steel microballon;
Described microballon is projected onto described surface portion with the pressure between 1 and 5bars (bar);
Described manufacture method comprises the intermediate surface pre-shaping step for described magnetic part further, and described surface finishing steps carried out before described shot-peening finished surface treatment step;
Described manufacture method comprises the final surface finishing steps for described magnetic part further, and described final surface finishing steps carries out after described shot-peening finished surface treatment step.
The invention still further relates to a kind of method of the magnetic circuit for the manufacture of high sensitivity differential relay, described magnetic circuit comprises two magnetic parts forming armature and blade, and described method comprises:
Manufacture described magnetic part; And
Assemble described magnetic part to form described magnetic circuit,
Wherein, the manufacture of at least one of described magnetic part has come by using the method for the manufacture of magnetic part according to the present invention.
The invention still further relates to a kind of magnetic part of magnetic circuit of high sensitivity differential relay, it is characterized in that, described magnetic part is obtained by the method for the manufacture of magnetic part according to the present invention.
The invention still further relates to a kind of magnetic circuit of high sensitivity differential relay, described magnetic circuit comprises two magnetic parts forming armature and blade, and it is characterized in that, in described magnetic part, at least one is according to magnetic part of the present invention.
Accompanying drawing explanation
The present invention is understood better by reading the following explanation only provided with exemplary forms and with reference to accompanying drawing, in the accompanying drawings:
Fig. 1 is according to the schematic diagram comprising the circuit breaker of high sensitivity differential relay of the present invention;
Fig. 2 is the schematic diagram of the equipment for implementing method according to an embodiment of the invention;
Fig. 3 is the schematic diagram of the electric assembly according to the impedance for determining magnetic circuit of the present invention.
Embodiment
Fig. 1 shows circuit breaker 1, with the leakage current in detection of primary circuit on the primary power circuit that circuit breaker 1 is plugged on electric installation 2.
Circuit breaker 1 comprises magnetic annular coil 3, high sensitivity differential relay 5 and the mechanism 7 for disconnecting primary circuit.
Magnetic annular coil 3 can current failure on detection of primary circuit.
Differential relay 5 comprises magnetic circuit 9, permanent magnet 11 and back-moving spring 13.
Magnetic circuit 9 comprises two magnetic relay parts, is respectively moving vane 15 and U-shaped stationary armature 17.
Armature 17 comprises pedestal 18 and the first and second branches 19 and 20, in branch 19,20 each with polar surfaces 19a, 20a of plane for end.
Blade 15 is installed in the opposite of polar surfaces 19a, 20a of armature 17.Blade 15 comprises the polar surfaces 15a of basic plane, and polar surfaces 15a can contact with polar surfaces 19a with 20a of armature 17.
Blade 15 is installed to be the axis corresponding around the edge 21 of the first branch with armature 17 and is stopping (idle) to rotate between position and position of rotation as shown in Figure 1, in rest position, the polarization surface 15a of blade 15 contacts with polarization surface 19a, 20a of armature 17, at position of rotation place, the blade 15 rotated around edge 21 no longer contacts with the polarization surface 2a of the second branch 20.
The polarization branch 15a of blade 15 and polarization surface 19a and 20a of armature 17 is the contact areas being designed to contact with each other.
Blade 15 and armature are made up of Fe-Ni alloy/C.Fe-Ni alloy/C such as comprises the nickel of 46wt% to 49wt%, all the other impurity being iron and producing in manufacturing.This Fe-Ni alloy/C is such as
type alloy.
Permanent magnet 11 adopts the form of parallelepiped rod.Permanent magnet 11 is placed between the branch 19 and 20 of armature 17, and one of two poles of magnet 11 are on pedestal 18 side of armature 17, and another pole faces blade 15.
Permanent magnet 11 can apply magnetic force so that blade 15 is remained on stop position on blade 15.
In addition, back-moving spring 13 can apply power that the power applied with permanent magnet 11 resists mutually to order about blade 15 to position of rotation on blade 15.
Control coil 23 is wrapped in the second branch 20 of armature 17.Control coil 23 is provided electric current by means of magnetic annular coil 3.When flowing through exciting current in control coil 23, control coil 23 can set up the magnetic flux contrary with the magnetic flux of permanent magnet 11 in branch 20.
When loop coil 3 detects current failure, generate exciting current in control coil 23, exciting current sets up the magnetic flux contrary with the magnetic flux of permanent magnet 11 in magnetic circuit 9, and makes the maintenance energy on be applied to blade 15 reduce or eliminate.The power that back-moving spring 13 applies exceedes the maintenance energy be applied on blade 15, and this orders about blade 15 and rotates towards its position of rotation.
Such as, spring is caused blade 15 to rotate towards its position of rotation by counterweight to make the fault current being more than or equal to 30mA.
Blade 15 can drive the mechanism 7 for disconnecting primary circuit from its stop position to the movement of position of rotation, and thus the electric power of shearing device 2 supplies.
The manufacture of magnetic circuit 9 comprises two magnetic parts manufacturing this loop, i.e. blade 15 and armature 17, and assembles these two parts to form loop.
The manufacture of each magnetic part comprises manufacture preform members.
Each preform members is manufactured into Fe-Ni alloy/C band, then shaping is bent, to give the geometry desired by each parts, high temperature (being greater than 1000 degrees Celsius) heat treatment is carried out after cutting, this heat treatment is designed to give the machinery desired by alloy strip and magnetic characteristic, is in particular, for example less than or equal to the extremely low coercive field strength of 15A/m.
Such coercive field makes it possible to relay and has high sensitivity, and such as electric trigger power is less than 250 μ VA and more preferably between 50 and 150 μ VA.
Under known way, alloy strip is by carrying out hot rolling and follow-up cold rolling acquisition by ingot casting.
Each preform members then through employing shot-peening processing surface treatment step, wherein, microballon be projected onto each preform members at least partially on the surface.For each in magnetic part, its projection has the surface portion of microballon at least to comprise the contact area of these parts, and namely these parts are designed to the region with another component contact.
According to an embodiment, microballon is projected onto on the side of the contact area (i.e. the region being designed to contact with each other of these parts) comprising these parts of magnetic part.
Use the process of shot-peening processing to cause the strain hardening on the surface of production to penetrate a few percent millimeter in handled surface portion, especially from 0.03mm to 0.05mm, and therefore increase the hardness of the surface portion of these parts.Such as, shot-peening processing process makes the Vickers hardness on the surface of parts (Vickershardness) to increase above 50HV, and hardness is such as from 120HV to more than 170HV.
At least a few percent millimeter the degree of depth of especially approximate 0.03mm be enough to have to perform after shot-peening processing process surface work that a small amount of material removes may, keep the hardness after increase to be on the component surface at least 170HV simultaneously.In addition, a few percent millimeter the degree of depth of 0.05mm especially at the most make it possible to the magnetic characteristic of maintaining member at the most.
At the end of shot-peening processing process, each parts stand fine finishining process, and fine finishining process is designed to outward appearance, roughness and evenness desired by member of imparting application.
Especially, obtain at least equal 0.03 μm and the roughness Ra being less than 0.5 μm make it possible to guarantee two parts contact surface between good contact quality.
Blade 15 and armature 17 therefore manufactured and be assembled to form magnetic circuit 9 subsequently.
Alternatively, before shot-peening processing treatment step, middle fine finishining process can be completed on preform members.
Be described in detail with reference to figure 2 pairs of shot-peening processing treatment steps at this, Fig. 2 generally show the equipment 50 for realizing this step.
Equipment 50 comprises shell 52, and shell 52 comprises the opening 54 for inserting preform members, and opening 54 can be sealed with tight closure shell 52.
Equipment 50 comprises the bracing or strutting arrangement 56 for preform magnetic part further, and for the microballon transported in a fluid stream being projected the device 58 on the parts clamped by bracing or strutting arrangement 56.
Microballon grenade instrumentation 58 comprises the nozzle 60 for projecting the microballon stream transported in a fluid, and for supplying the device of the pressure fluid transporting microballon to nozzle 60.
Pearl is urn glass, pottery or steel ball.Such as, the diameter of microballon is between 20 μm and 200 μm.
Such as, microballon is
the SS19 type microballon that France sells.The calcium soda-lime glass (sodiocalcicglass) that these microballons are substantially equal to 40 μm by average diameter is made.
The fluid transporting microballon is such as water or air.
Such as, fluid used is water, is wherein mixed with microballon, and mixture comprises the microballon of 25vol% (volume fraction).
Nozzle 60 comprises opening 62, and the pressure fluid being mixed with microballon is projected by opening 62.The shape of opening 62 and size can be pending the span on surface and the uniformity of desired projection based on regulate.Opening 62 is such as circular open, and its diameter, between 5 and 12mm, especially equals 10mm.
The pressure of the fluid being mixed with microballon in the exit of nozzle 60 is such as between 1 and 5bars (bar).
Parts project in the process of microballon, magnetic part can be remained on the pre-position on opening 62 opposite of nozzle 60 by bracing or strutting arrangement 56.Bracing or strutting arrangement 56 can also revise the position of magnetic part relative to grenade instrumentation 58, the distance d especially between parts and opening 62, and parts are relative to the direction of the injection from opening, is after this called as angle of attack α.
Distance d is such as between 100mm and 200mm.
The angle of attack such as equals 90 °, and the incidence angle be injected on parts from nozzle equals 90 ° substantially.The angle of attack can also be selected as being less than 90 °, such as, equal 75 °.
The strain hardness that parts handled by the adjustment of distance d and angle α makes it possible to control obtain.
Bracing or strutting arrangement 56 such as comprises can apply magnetic force magnetic part to be maintained the magnet of proper position on magnetic part, and this magnet can rotate relative to nozzle 60 thus magnetic part be rotated relative to nozzle 60.
Therefore bracing or strutting arrangement 56 makes it possible to by clearing up one or more parts from the injection of nozzle 60.
Such as, band by ingot casting being carried out hot rolling and follow-up cold rolling manufacture, comprises the Ni of 48% by Fe-Ni alloy/C, all the other impurity being iron and producing in manufacturing.
Preformed blade and armature are manufactured by cutting band, bending forming and heat treatment subsequently, and heat treatment is designed to give the machinery desired by band and magnetic characteristic.
Subsequently on first preformed armature perform in the middle of fine finishining, follow-up for use with reference to the equipment described in figure 2 carry out shot-peening process process.Shot-peening processing process end, again to armature application fine finishining process to obtain final armature.
Also use with reference to the equipment described in figure 2 carries out shot-peening processing process on the preformed armature of second batch and do not carry out middle fine finishining process.At shot-peening processing process end, to armature application fine finishining process to obtain final armature.
Also use with reference to the equipment described in figure 2 carries out shot-peening processing process on a collection of preformed blade and do not carry out middle fine finishining process.At shot-peening processing process end, to blade applications fine finishining process to obtain final blade.
Whole shot-peening processing process all uses the above-mentioned SS19 type microballon transported in water, and water-bead mixture comprises the microballon of 25vol%.
The nozzle used has the circular open 62 that diameter equals 10mm.In addition, the opening 62 of nozzle 60 and the distance between blade and armature are set to 150mm.
Often criticize armature and blade is divided into nine groupings, and each armature in each grouping and blade use shot-peening processing to process, angle of attack α, the pressure P of shot-peening processing and open-assembly time T parameter are as shown in Table 1 below.
Table 1: the shot-peening processing process parameter being applied to each grouping
Following measurement shot-peening processing process is for the impact of the hardness on the surface of blade and armature.
For this reason, the blade of each grouping or the vickers hardness hv 0.025 of armature and HV0.01 is measured.
Also measure the armature of each grouping and the roughness value Ra of blade.
Provide obtained measured value in table 2, these measured values are produced by the mean value of roughness, drop and Vickers hardness number that the blade of five in each grouping or armature measure.
In addition, the impact of shot-peening processing process on the electrical characteristics of the magnetic circuit that handled blade and armature are formed is determined.Especially, by carrying out assembling the impedance of the magnetic circuit according to prior art that formed through coating usually between 1.10 Ω (ohm) and 1.75 Ω without the blade of shot-peening processing and armature.Therefore magnetic circuit is formed by the blade of each grouping and armature, and the impedance of the magnetic circuit therefore formed is measured, i.e. the impedance in loop passed through of magnetic flux.
The impedance measurement in each loop is to have come with reference to based on the assembly described in figure 3.
As shown in Figure 3, on blade 15, power F is applied by means of weight.This power is designed to the power simulating permanent magnet 11 applying when differential relay 5 works.
The first coil 70 comprising N1 circle is wound around around one of the branch 19 of armature 17, and the second coil 72 comprising N2 circle is wound around around another branch 20 of armature 17.
First coil 70 is connected on AC current feedback circuit 74, and the second coil is connected on voltmeter 76.
Generator 74 generates AC electric current I in the first coil 70, and the value of electric current uses ampere meter 78 to control.
Voltage V on the terminal of the second coil 74 is measured.
Impedance Z is then confirmed as the ratio of voltage V and electric current I.
Especially, the armature of each grouping in first grouping with and uncoated and the blade assembling processed without shot-peening, with coating chrome coating but blade assembling process without shot-peening, and last obtain with use method according to the present invention blade, namely from the blade assembling that the uncoated of the respective packets of each batch of blade is still processed through shot-peening.
From grouping each in the grouping of second batch armature also with and uncoated and the blade assembling processed without shot-peening, with coating chrome coating but blade assembling process without shot-peening, and last obtain with use method according to the present invention blade, namely from the blade assembling that the uncoated of the respective packets of each batch of blade is still processed through shot-peening.
Following measurement: the armature in each grouping and uncoated and the electrical impedance of the magnetic circuit formed without the blade that shot-peening is processed, is labeled as Zpal.prod; The electrical impedance of the magnetic circuit that the armature in each grouping is formed with coating chromium but without the blade that shot-peening is processed, is labeled as ZpalCr; The electrical impedance of the magnetic circuit that the blade according to the present invention of the armature in each grouping and respective packets is formed, is labeled as Zpal μ bill.
Measured impedance is provided in table 2.
Equally, the blade of each grouping in the grouping of each batch uncoated and without the armature assembling of shot-peening processing, with coating chrome coating but assemble without the armature that shot-peening process, and finally and the uncoated of the respective packets of armature, namely first armature that obtains of use method according to the present invention but assemble through the armature that shot-peening is processed.
Following measurement: the blade in each grouping and uncoated and the electrical impedance of the magnetic circuit formed without the armature that shot-peening is processed, is labeled as Zarm.prod; The electrical impedance of the magnetic circuit that the blade in each grouping is formed with coating chromium but without the armature that shot-peening is processed, is labeled as ZarmCr; The electrical impedance of the magnetic circuit that the blade in each grouping is formed with the armature according to the present invention from the respective packets of first armature, is labeled as Zarm μ bill.
The measured impedance represented with ohms (ohm) is provided in table 2.
It should be noted that be necessary by the blade of a grouping and the electrical impedance Zarm μ bill of magnetic circuit that formed from the armature according to the present invention that the correspondence of first armature is divided into groups equal with the electrical impedance Zpal μ bill of the magnetic circuit that the blade according to the present invention of first armature of this group and respective packets is formed.
Table 2: impedance, hardness and roughness metric
The result provided in table 2 illustrates, according to the manufacture method for blade and armature of the present invention, in particular for carrying out the step of shot-peening processing to these blades and armature, makes it possible to gratifying mode to increase the case hardness of these parts.In fact, no matter the angle of attack equals 90 ° or 75 °, and do not consider the pressure (between 1bar and 2.5bar) of the stream projected in the exit of nozzle, vickers hardness hv 0.25 and HV0.01 are obviously higher than the initial hardness (120HV) of parts and obviously higher than the general hardness (170HV) by using painting method to obtain.
In addition, the reference coefficient of blade and armature is satisfactory equally, is especially greater than 0.03 μm.Therefore, these results illustrate, the surface strain sclerosis of parts makes it possible to the fine finishining performing gratifying parts by removing material, keeps the high rigidity on surface simultaneously.
Can also see there is gratifying electrical impedance, between 1.10 Ω and 1.75 Ω by the electrical impedance of the magnetic circuit using blade made according to the method for the present invention and armature to be formed.These gratifying values are also by wherein only there being parts to use circuitry observes made according to the method for the present invention to arrive.
Therefore these results illustrate, shot-peening processing treatment step makes it possible to the hardness on the surface increasing these magnetic parts and other characteristics of not negative effect, and especially the impedance of magnetic circuit or those parts bear the ability of effective fine finishining process.
Contact surface according to magnetic part of the present invention has gratifying abrasion resistance thus, and this abrasion resistance is far longer than the abrasion resistance of the relay of the metal coating comprising known type.
But it must be understood that, above-mentioned example embodiment is not determinate.
Especially, according to an alternative, only a blade or only an armature can utilize made according to the method for the present invention.
Claims (12)
1. the method for the magnetic part for the manufacture of high sensitivity differential relay (5) (15,17), described manufacture method comprises the surface treatment step of carrying out shot-peening processing at least partially on the surface to affiliated magnetic part (15,17), and described shot-peening finished surface treatment step comprises and being projected in described surface portion by pressurization microballon.
2. the method for the manufacture of magnetic part (15,17) according to claim 1, wherein, described magnetic part is armature (17) or the blade (15) of magnetic circuit (9).
3. the method for the manufacture of magnetic part (15,17) according to claim 1, wherein, described parts are made up of Fe-Ni alloy/C, and Fe-Ni alloy/C comprises the nickel of 46wt% to 49wt%, all the other impurity being iron and producing in manufacturing.
4. the method for the manufacture of magnetic part (15,17) according to claim 1, wherein, described microballon is glass, pottery or steel microballon.
5. the method for the manufacture of magnetic part (15,17) according to claim 1, wherein, described microballon is projected onto in described surface portion with the pressure between 1 and 5 bar.
6. the method for the manufacture of magnetic part (15,17) according to claim 1, the intermediate surface pre-shaping step for described magnetic part (15,17) carried out before being included in described shot-peening finished surface treatment step further.
7. the method for the manufacture of magnetic part (15,17) according to claim 1, the final surface finishing steps for described magnetic part (15,17) carried out after being included in described shot-peening finished surface treatment step further.
8. manufacture method according to claim 1, it is characterized in that, described manufacture method be included in described surface treatment step before for the manufacture of the step of preform magnetic part, the described step for the manufacture of preform magnetic part comprises the stage for cutting the band by hot rolling and follow-up cold rolling acquisition, and described surface treatment step is carried out on described preform magnetic part.
9. method according to claim 8, is characterized in that, the described step for the manufacture of preform magnetic part be included in the cutting stage further after for by bending the stage making cut band be shaped.
10. the method for the magnetic circuit for the manufacture of high sensitivity differential relay (5) (9), described magnetic circuit (9) comprises two magnetic parts (15,17) forming armature (17) and blade (15), and described method comprises:
Manufacture described magnetic part (15,17); And
Assemble described magnetic part (15,17) to form described magnetic circuit (9),
Wherein, by using the method for the manufacture of magnetic part according to any one of claim 1 to 9 to complete the manufacture of at least one in described magnetic part (15,17).
The magnetic part (15,17) of the magnetic circuit (9) of 11. 1 kinds of high sensitivity differential relays (5), it is characterized in that, described magnetic part (15,17) is obtained by manufacture method according to any one of claim 1 to 7.
The magnetic circuit (9) of 12. 1 kinds of high sensitivity differential relays (5), described magnetic circuit (9) comprises two magnetic parts (15,17) forming armature (17) and blade (15), it is characterized in that, at least one in described magnetic part is magnetic part according to claim 11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1454187A FR3020895B1 (en) | 2014-05-09 | 2014-05-09 | METHOD FOR MANUFACTURING MAGNETIC PIECES OF A DIFFERENTIAL RELAY COMPRISING SURFACE TREATMENT BY MICROBILING |
| FR1454187 | 2014-05-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105097357A true CN105097357A (en) | 2015-11-25 |
| CN105097357B CN105097357B (en) | 2019-12-24 |
Family
ID=50976965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510226841.9A Active CN105097357B (en) | 2014-05-09 | 2015-05-06 | Process for manufacturing a magnetic component of a differential relay with surface treatment by shot peening |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2942792B1 (en) |
| CN (1) | CN105097357B (en) |
| ES (1) | ES2634000T3 (en) |
| FR (1) | FR3020895B1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031000A (en) * | 1987-07-28 | 1989-02-08 | 梅兰日兰公司 | High sensitive electromagnetic trip device and manufacture method thereof |
| CN201392704Y (en) * | 2009-03-16 | 2010-01-27 | 韩伍林 | Moving-core abrasion-free double-push electromagnet |
| CN201886854U (en) * | 2010-11-22 | 2011-06-29 | 宁波力和机电工业有限公司 | Magnetic body |
| CN102610354A (en) * | 2011-01-24 | 2012-07-25 | 北京中科三环高技术股份有限公司 | Processing method for corrosion-resistance rare-earth magnet and workpiece |
| WO2012105913A1 (en) * | 2011-02-04 | 2012-08-09 | Eti Elektroelement D.D. | Electromagnetic relay, in particular for interruption of an electric circuit in the cases of differential circuit, and a switch comprising such relay |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2765724B1 (en) * | 1997-07-04 | 1999-08-13 | Imphy Sa | SOFT MAGNETIC ALLOY OF FE-NI-CR-TI TYPE FOR MAGNETIC CIRCUIT OF A HIGH SENSITIVITY RELAY |
| US9243304B2 (en) * | 2011-07-01 | 2016-01-26 | Vacuumschmelze Gmbh & Company Kg | Soft magnetic alloy and method for producing a soft magnetic alloy |
-
2014
- 2014-05-09 FR FR1454187A patent/FR3020895B1/en not_active Expired - Fee Related
-
2015
- 2015-04-17 EP EP15163999.4A patent/EP2942792B1/en active Active
- 2015-04-17 ES ES15163999.4T patent/ES2634000T3/en active Active
- 2015-05-06 CN CN201510226841.9A patent/CN105097357B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031000A (en) * | 1987-07-28 | 1989-02-08 | 梅兰日兰公司 | High sensitive electromagnetic trip device and manufacture method thereof |
| CN201392704Y (en) * | 2009-03-16 | 2010-01-27 | 韩伍林 | Moving-core abrasion-free double-push electromagnet |
| CN201886854U (en) * | 2010-11-22 | 2011-06-29 | 宁波力和机电工业有限公司 | Magnetic body |
| CN102610354A (en) * | 2011-01-24 | 2012-07-25 | 北京中科三环高技术股份有限公司 | Processing method for corrosion-resistance rare-earth magnet and workpiece |
| WO2012105913A1 (en) * | 2011-02-04 | 2012-08-09 | Eti Elektroelement D.D. | Electromagnetic relay, in particular for interruption of an electric circuit in the cases of differential circuit, and a switch comprising such relay |
Non-Patent Citations (1)
| Title |
|---|
| 闫志琴: "铁芯喷丸强化工艺探讨", 《机床电器》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105097357B (en) | 2019-12-24 |
| FR3020895B1 (en) | 2016-06-24 |
| EP2942792B1 (en) | 2017-06-14 |
| ES2634000T3 (en) | 2017-09-26 |
| FR3020895A1 (en) | 2015-11-13 |
| EP2942792A1 (en) | 2015-11-11 |
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