CN116994831A - Method and device for surface treatment of insulated wire, insulated wire and coil - Google Patents
Method and device for surface treatment of insulated wire, insulated wire and coil Download PDFInfo
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- CN116994831A CN116994831A CN202210447843.0A CN202210447843A CN116994831A CN 116994831 A CN116994831 A CN 116994831A CN 202210447843 A CN202210447843 A CN 202210447843A CN 116994831 A CN116994831 A CN 116994831A
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- insulated
- storage guide
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000004381 surface treatment Methods 0.000 title claims abstract description 29
- 239000004696 Poly ether ether ketone Substances 0.000 claims abstract description 46
- 229920002530 polyetherether ketone Polymers 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 36
- 229920005989 resin Polymers 0.000 claims abstract description 36
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 239000002966 varnish Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000007788 roughening Methods 0.000 claims abstract description 7
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims abstract 5
- 238000003860 storage Methods 0.000 claims description 47
- 239000003570 air Substances 0.000 claims description 37
- 239000004020 conductor Substances 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000009832 plasma treatment Methods 0.000 abstract description 3
- 210000002381 plasma Anatomy 0.000 description 63
- 239000010410 layer Substances 0.000 description 27
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000002425 crystallisation Methods 0.000 description 7
- 230000008025 crystallization Effects 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 7
- 239000002344 surface layer Substances 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002715 modification method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a surface treatment method and a device thereof for an insulated wire, the insulated wire and a coil, wherein the method comprises the following steps: solidifying the PEEK resin insulating layer on the outer layer of the insulated wire and then cooling; moving the cooled insulated wire; introducing an air source into the plasma jet module to form a plasma jet area; the insulated wire passes through the plasma jet area, and the surface of the insulated wire is subjected to plasma jet treatment so as to achieve surface roughening of the insulated wire. By carrying out plasma treatment on the surface of the insulated wire, the roughness of the PEEK resin insulation layer is obviously increased, so that the surface of the insulated wire is activated, the surface adhesion capability can be improved, and finally the adhesion between the PEEK insulated wire and impregnating varnish can be improved.
Description
Technical Field
The invention relates to the technical field of wire and cable manufacturing, in particular to a surface treatment method and device for an insulated wire, the insulated wire and a coil.
Background
An insulated wire made of Polyetheretherketone (PEEK) resin, which is used mainly for windings in oil-cooled motors of new energy vehicles, must ensure adhesion to impregnating varnish. Because PEEK resin material has self-lubricity and low surface activity, the PEEK resin material has poor adhesion with impregnating varnish in an oil-cooled motor winding, and cannot achieve good impregnating effect.
Disclosure of Invention
Object of the invention
The invention aims to provide a surface treatment method and a device thereof for an insulated wire, the insulated wire and a coil, wherein the surface of the insulated wire is subjected to plasma treatment, so that the roughness of a PEEK resin insulating layer is obviously increased, the surface of the insulated wire is activated, the surface adhesion capability can be improved, and finally the adhesion between the PEEK insulated wire and impregnating varnish can be improved.
(II) technical scheme
A first aspect of the present invention provides a surface treatment method of an insulated wire, comprising: solidifying the PEEK resin insulating layer on the outer layer of the insulated wire and then cooling; moving the cooled insulated wire; introducing an air source into the plasma jet module to form a plasma jet area; the insulated wire passes through the plasma jet area, and the surface of the insulated wire is subjected to plasma jet treatment so as to achieve surface roughening of the insulated wire.
Further, the moving cooled insulated wire includes: winding the cooled insulated wire on a wire storage guide wheel to tension the cooled insulated wire; and (5) pulling the cooled insulated wire, and rotating the wire storage guide wheel to drive the insulated wire to move.
Further, at least two plasma jet modules are arranged, and the wire storage guide wheels are arranged in pairs and at intervals up and down; winding the insulated electric wire on a wire storage guide wheel and tensioning; pulling and lifting the insulated wire upwards; the plasma jet acts on a first surface or a second surface of the insulated wire after tensioning, respectively, wherein the first surface and the second surface are two opposite surfaces.
Further, the moving speed of the insulated wire is set to 0.2-18.0m/min.
Further, the gas source comprises any one or more than two of oxygen, air, argon and nitrogen; the air pressure of the air source is set to be 0.20-2.00 MPa; the output power of the air source is set to 300-500W.
Further, the distance between the nozzle of the plasma jet module and the surface of the insulated wire is set to be 5-20mm.
Further, the plasma jet region is in a strip shape, and the width of the plasma jet region is larger than that of the first surface or the second surface.
A second aspect of the present invention provides an insulated wire prepared by the above method; the insulated wire comprises a conductor bare wire and a PEEK resin insulation layer formed on the periphery of the conductor bare wire; the surface roughness of the insulated wire is 0.25-0.80 mu m.
A third aspect of the present invention provides a coil comprising the insulated wire described above, the coil being subjected to a dip varnish treatment.
A fourth aspect of the present invention provides a surface treatment device for an insulated wire, comprising: a wire storage guide configured to be rotatable, the insulated wire being wound around the wire storage guide to tension the insulated wire, and to pull the insulated wire, the wire storage guide being rotated to move the insulated wire; the plasma jet module is used for forming a plasma jet area when the air source is introduced; the insulated wire passes through the plasma jet area, and the surface of the insulated wire is subjected to plasma jet treatment so as to achieve surface roughening of the insulated wire.
(III) beneficial effects
The technical scheme of the invention has at least the following beneficial technical effects:
the surface of the insulated wire can be uniformly bombarded by high-energy plasmas through continuously moving the cooled insulated wire, so that the surface treatment is finished, the roughness of the PEEK resin insulating layer after the surface treatment is obviously increased, the surface activation of the insulated wire can be realized, the surface adhesion capability can be improved, and finally the adhesion between the PEEK insulated wire and impregnating varnish can be improved; meanwhile, good overall insulation strength and electrical performance of the winding can be ensured, so that the use requirement of the new energy automobile motor can be met.
Drawings
Fig. 1 is a flow chart showing a surface treatment method of an insulated wire according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of a surface treatment apparatus for an insulated wire according to a second embodiment of the present invention;
fig. 3 is a schematic structural view of a surface treatment apparatus for an insulated wire according to a third embodiment of the present invention;
fig. 4 is a schematic structural view of a surface treatment apparatus for an insulated wire according to a fourth embodiment of the present invention;
reference numerals:
11-a wire storage guide wheel; 12-a plasma jet module; 13-insulating electrical wires; 14-a plasma jet zone; 111-a first wire storage guide wheel; 112-a second wire storage guide wheel.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The conventional surface modification methods mainly comprise a physical mechanical treatment method, a chemical oxidation method, a flame method, a corona method, a vulcanization method, a surface coating treatment and the like, and the conventional surface modification methods have the defects: if the surface roughness is increased by a physical mechanical treatment method, the damage to the material is easily caused; the coating prepared by the flame method has larger void content, is easy to cause lower bonding strength with a matrix material; the chemical treatment method is easy to cause a certain environmental pollution and the like. The method for treating the surface by adopting the plasma has the advantages of high processing speed, good treatment effect, small damage to the material, and the like, so that the method is widely applied to surface modification. However, the application of the polyether-ether-ketone (PEEK) insulating resin material is less, and the research on the compatibility of the treatment effect of the PEEK insulating resin material with other insulating paint liquid and the influence of the insulating property is not referred to; in addition, since the PEEK resin material itself has self-lubricity and low surface activity, adhesion with impregnating varnish in an oil-cooled motor winding is poor, and a good impregnating effect cannot be achieved.
To solve the above-mentioned technical problem, a first aspect of the present invention provides a surface treatment method for an insulated wire, as shown in fig. 1, specifically including the following steps:
step S10, solidifying the PEEK resin insulating layer on the outer layer of the insulated wire and then cooling;
step S20, moving the cooled insulated wire;
step S30, introducing an air source into the plasma jet module to form a plasma jet area;
in step S40, the insulated wire passes through the plasma jet region, and the surface of the insulated wire is subjected to plasma jet treatment to achieve surface roughening of the insulated wire.
The insulated wire in the embodiment of the invention may include: a conductor bare wire; coating an adhesive on the outer side of the conductor bare wire to form an adhesive layer for coating the conductor bare wire; the PEEK resin insulation layer is formed by melt extrusion at 380-410 ℃, during which the melted PEEK resin material can be in contact fusion with PEEK nano-powder material in the adhesive layer, so that tight bonding is formed between the adhesive layer and the PEEK resin insulation layer, and the PEEK resin insulation layer is formed on the surface layer of the insulated wire after cooling crystallization. The plasma jet module can comprise a jet cavity and a nozzle, the air source can be compressed air, and a plasma jet area jetted by the plasma jet module can act on the PEEK resin insulating layer; the surface of the insulated wire can be uniformly bombarded by high-energy plasmas through continuously moving the cooled insulated wire, so that the surface treatment is finished, the roughness of the PEEK resin insulating layer after the surface treatment is obviously increased, the surface activation of the insulated wire can be realized, the surface adhesion capability can be improved, and finally the adhesion between the PEEK insulated wire and impregnating varnish can be improved; meanwhile, good overall insulation strength and electrical performance of the winding can be ensured, so that the use requirement of the new energy automobile motor can be met.
In some embodiments, the mobile cooled insulated wire includes: winding the cooled insulated wire on a wire storage guide wheel to tension the cooled insulated wire; and (5) pulling the cooled insulated wire, and rotating the wire storage guide wheel to drive the insulated wire to move. After the insulated wire is tensioned, the surface of the insulated wire can be uniformly bombarded by high-energy plasmas, and the surface treatment is finished.
In some embodiments, the speed of movement of the insulated wire is set to 0.2-18.0m/min. Preferably, the moving speed of the insulated wire may be set to 0.5-15.0m/min. According to different wire diameters of the insulated wires, the moving speed is controlled, and the surface of the insulated wires can be uniformly and continuously subjected to plasma treatment.
In some embodiments, the gas source comprises any one or a combination of two or more of oxygen, air, argon, nitrogen; the air pressure of the air source is set to be 0.20-2.00 MPa; the output power of the air source is set to 300-500W. Preferably, the air pressure of the air source can be set to be 0.30MPa to 1.00MPa.
In an exemplary embodiment, the air source may use compressed air (oil-free and water-free air source), which is easy to obtain and can save production cost.
In some embodiments, the distance between the nozzle of the plasma jet module and the surface of the insulated wire is set to be 5-20mm. Preferably, the distance between the nozzle of the plasma jet module and the surface of the insulated wire is set to be 5-15mm.
In some embodiments, the plasma jet module is at least provided with two wire storage guide wheels in pairs and arranged at intervals up and down, the insulated wire is wound on the wire storage guide wheels and is pulled upwards and lifted after being tensioned, the plasma jet acts on the first surface or the second surface of the insulated wire respectively, and the first surface and the second surface are two opposite surfaces. In the embodiment of the present invention, the cross section of the insulated wire may be a rectangular structure whose width direction dimension is larger than the thickness direction dimension, so that the first surface and the second surface are width surfaces. By tensioning the insulated wire, the surface of the insulated wire is favorably bombarded by uniform high-energy plasma, and the plasma jet is covered on the whole surface, so that the roughness is obviously increased after the surface treatment.
In some embodiments, the plasma jet region is in the form of a ribbon, and the width of the plasma jet region is greater than the width of the first surface or the second surface. The thickness surface is relatively smaller due to the limitation of the specification wire diameter, the size of the width surface is larger than that of the thickness surface, the nozzle design of the plasma jet module is larger than that of the insulated wire, and the thickness surface can be covered by the plasma jet during spraying.
A second aspect of the present invention provides an insulated wire prepared by the above method; the insulated wire comprises a conductor bare wire and a PEEK resin insulation layer formed on the periphery of the conductor bare wire; the surface roughness of the insulated wire is 0.25-0.80 μm. The roughness of the PEEK resin insulating layer after plasma surface treatment is obviously increased, the surface roughness of the insulating wire can reach 0.42-0.78 mu m, so that the surface of the insulating wire is activated, the surface adhesion capability can be improved, and finally the adhesion between the PEEK insulating wire and impregnating varnish can be improved.
A third aspect of the present invention provides a coil comprising the insulated wire described above, the coil being subjected to a dip varnish treatment. Since the insulated wire is subjected to plasma surface treatment, the adhesion between the PEEK insulated wire and the impregnating varnish can be obviously improved after the coil manufactured by the insulated wire is subjected to the impregnating varnish treatment; through testing, the highest adhesive force can reach 132.09N, so that the good overall insulation strength and electrical property of the winding are ensured, and the use requirement of the new energy automobile motor can be met.
A fourth aspect of the present invention provides a surface treatment apparatus for an insulated wire, as shown in fig. 2 to 4, comprising: a wire storage guide 11 configured to be rotatable, the insulated wire 13 being wound around the wire storage guide 11 to tension the insulated wire 13, pull the insulated wire 13, and the wire storage guide 11 being rotated to move the insulated wire 13; a plasma jet module 12 for forming a plasma jet zone 14 when a gas source is turned on; the insulated wire passes through the plasma jet zone 14 and the surface of the insulated wire is subjected to a plasma jet treatment to effect surface roughening of the insulated wire.
The wire storage guide wheel 11 may include a first wire storage guide wheel 111 and a second wire storage guide wheel 112, which are disposed at intervals from top to bottom, and after the insulated wire 13 is wound on the wire storage guide wheel 11 and is tensioned, in order to be able to tension the insulated wire 13, a plurality of grooves may be disposed on the wire storage guide wheel 11, and the insulated wire 13 may be wound on the wire storage guide wheel 11 for a plurality of circles, and the insulated wire 13 may be disposed in the groove of the wire storage guide wheel 11. The cooled insulated wire 13 is pulled to the wire storage guide wheel 11 by a tractor, the insulated wire 13 is sequentially wound on the first wire storage guide wheel 111 and the second wire storage guide wheel 112, the winding mode can be that the insulated wire 13 is firstly wound on the first wire storage guide wheel 111, downwards wound in one groove of the second wire storage guide wheel 112 and upwards wound on the first wire storage guide wheel 111, and the insulated wire 13 is downwards wound in the other groove of the second wire storage guide wheel 112 again, so that the insulated wire 13 runs side by side at intervals in the process of upwards lifting; the first wire storage guide wheel 111 and the second wire storage guide wheel 112 rotate in the same direction to drive the insulated wire 13 to move at a constant speed. At this time, the number of the plasma jet modules 12 may be two, the nozzles of the plasma jet modules 12 are respectively aligned to two opposite width surfaces of the insulated wire 13, and the high-energy plasma bombardment is sequentially and uniformly performed on the insulated wire 13, so as to implement the surface treatment, and after the insulated wire 13 after the surface treatment is wound on the first wire storage guide wheel 111, the wire is wound by the wire winding machine. Since the nozzle of the plasma jet module 12 may be set larger than the width surface of the insulated wire 13, the plasma jet region 14 may cover the thickness surface of the insulated wire 13 when being sprayed. The arrows in fig. 2 and 3 are each schematically indicated as the moving direction of the insulated wire 13.
The technical scheme of the present invention is further explained below with reference to several embodiments, but the present invention is not limited thereto. It should be understood, however, that within the scope of the present invention, the above-described features of the present invention and features specifically described below (e.g., in the examples) may be combined with each other to form new or preferred embodiments. And are limited to a space, and are not described in detail herein.
Embodiments of the present invention include the following specific embodiments:
example 1
The width of the conductor bare wire is 3.00mm, the thickness is 1.50mm, the width-thickness ratio is 1:2, the PEEK resin insulating layer is formed by melt extrusion, and the PEEK resin insulating layer is formed on the surface layer of the insulating wire after cooling and crystallization; the cooled insulated wire is wound on a wire storage guide wheel, the insulated wire is tensioned, the insulated wire is pulled, the moving speed of the insulated wire is 10m/min, the air pressure of an air source is regulated to be 0.30MPa, the output power of the air source is set to be 300W, the set distance between a nozzle of a plasma jet module and the width surface of the insulated wire is 7mm, and plasma jet is sequentially and uniformly sprayed on two opposite width surfaces of the insulated wire and covers the thickness surface of the insulated wire.
Example 2
The width of the conductor bare wire is 3.00mm, the thickness is 1.50mm, the width-thickness ratio is 1:2, the PEEK resin insulating layer is formed by melt extrusion, and the PEEK resin insulating layer is formed on the surface layer of the insulating wire after cooling and crystallization; the cooled insulated wire is wound on a wire storage guide wheel, the insulated wire is tensioned, the insulated wire is pulled, the moving speed of the insulated wire is 10m/min, the air pressure of an air source is regulated to be 0.60MPa, the output power of the air source is set to be 500W, the set distance between a nozzle of a plasma jet module and the width surface of the insulated wire is 7mm, and plasma jet is sequentially and uniformly sprayed on two opposite width surfaces of the insulated wire and covers the thickness surface of the insulated wire.
Example 3
The width of the conductor bare wire is 5.50mm, the thickness is 1.05mm, the width-thickness ratio is 1:5, the PEEK resin insulating layer is formed by melt extrusion, and the PEEK resin insulating layer is formed on the surface layer of the insulating wire after cooling and crystallization; the cooled insulated wire is wound on a wire storage guide wheel, the insulated wire is tensioned, the insulated wire is pulled, the moving speed of the insulated wire is 11m/min, the air pressure of an air source is regulated to be 0.30MPa, the output power of the air source is set to be 300W, the set distance between a nozzle of a plasma jet module and the width surface of the insulated wire is 7mm, and plasma jet is sequentially and uniformly sprayed on two opposite width surfaces of the insulated wire and covers the thickness surface of the insulated wire.
Example 4
The width of the conductor bare wire is 5.50mm, the thickness is 1.05mm, the width-thickness ratio is about 1:5, the PEEK resin insulation layer is formed by melt extrusion, and the PEEK resin insulation layer is formed on the surface layer of the insulation wire after cooling crystallization; the cooled insulated wire is wound on a wire storage guide wheel, the insulated wire is tensioned, the insulated wire is pulled, the moving speed of the insulated wire is 11m/min, the air pressure of an air source is regulated to be 0.60MPa, the output power of the air source is set to be 500W, the set distance between a nozzle of a plasma jet module and the width surface of the insulated wire is 7mm, and plasma jet is sequentially and uniformly sprayed on two opposite width surfaces of the insulated wire and covers the thickness surface of the insulated wire.
Example 5
The width of the conductor bare wire is 3.50mm, the thickness is 3.30mm, the width-thickness ratio is about 1:1, the PEEK resin insulation layer is formed by melt extrusion, and the PEEK resin insulation layer is formed on the surface layer of the insulation wire after cooling crystallization; the cooled insulated wire is wound on a wire storage guide wheel, the insulated wire is tensioned, the moving speed of the insulated wire is 8.5m/min after traction, the air pressure of an air source is regulated to be 0.30MPa, the output power of the air source is set to be 300W, the set distance between a nozzle of a plasma jet module and the width surface of the insulated wire is 10mm, and plasma jet is sequentially and uniformly sprayed on two opposite width surfaces of the insulated wire and covers the thickness surface of the insulated wire.
Example 6
The width of the conductor bare wire is 3.50mm, the thickness is 3.30mm, the width-thickness ratio is about 1:1, the PEEK resin insulation layer is formed by melt extrusion, and the PEEK resin insulation layer is formed on the surface layer of the insulation wire after cooling crystallization; the cooled insulated wire is wound on a wire storage guide wheel, the insulated wire is tensioned, the moving speed of the insulated wire is 8.5m/min after traction, the air pressure of an air source is regulated to be 0.60MPa, the output power of the air source is set to be 500W, the set distance between a nozzle of a plasma jet module and the width surface of the insulated wire is 10mm, and plasma jet is sequentially and uniformly sprayed on two opposite width surfaces of the insulated wire and covers the thickness surface of the insulated wire.
The roughness and adhesion properties of the insulated wire treated with the plasma jet were measured according to the following roughness test method and adhesion test method, as shown in table 1.
Roughness test: the temperature is 20+/-3 ℃, the humidity is 40-80% RH, and the 3D optical profilometer is used for testing by referring to ISO25178 standard.
Adhesive force test: the insulated wire was immersed in impregnating varnish, cured in an oven, cooled to ambient temperature, incubated at 150℃for 1 minute, and tested at a 10mm/min draw rate.
Table 1 roughness and adhesion Performance test results
As can be seen from table 1, the roughness of the PEEK resin insulating layer of the insulated wire after the plasma surface treatment is obviously increased, so that the surface activation of the insulated wire can improve the surface adhesion capability, and finally, the adhesion between the PEEK insulated wire and the impregnating varnish is improved. And the comparison shows that the bonding force of the insulated wire with the same wire diameter specification after the surface treatment of the plasma is obviously higher than that of the insulated wire without the surface treatment, so that after the coil manufactured by the insulated wire after the surface treatment of the plasma is treated by impregnating varnish, the good overall insulation strength and electrical property of the winding can be ensured, and the use requirement of a new energy automobile motor can be met.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (10)
1. A surface treatment method of an insulated wire, characterized by comprising:
solidifying the PEEK resin insulating layer on the outer layer of the insulated wire and then cooling;
moving the cooled insulated wire;
introducing an air source into the plasma jet module to form a plasma jet area;
the insulated wire passes through the plasma jet area, and the surface of the insulated wire is subjected to plasma jet treatment so as to achieve surface roughening of the insulated wire.
2. The method of claim 1, wherein moving the cooled insulated wire comprises:
winding the cooled insulated wire on a wire storage guide wheel to tension the cooled insulated wire;
and (5) pulling the cooled insulated wire, and rotating the wire storage guide wheel to drive the insulated wire to move.
3. The method according to claim 2, wherein at least two plasma jet modules are provided, and the wire storage guide wheels are arranged in pairs and at intervals up and down;
winding the insulated electric wire on a wire storage guide wheel and tensioning;
pulling and lifting the insulated wire upwards;
the plasma jet acts on a first surface or a second surface of the insulated wire after tensioning, respectively, wherein the first surface and the second surface are two opposite surfaces.
4. The method according to claim 1, wherein the moving speed of the insulated wire is set to 0.2-18.0m/min.
5. The method of claim 1, wherein the gas source comprises any one or a combination of two or more of oxygen, air, argon, nitrogen;
the air pressure of the air source is set to be 0.20-2.00 MPa;
the output power of the air source is set to 300-500W.
6. The method of claim 1, wherein the nozzle of the plasma jet module is set at a distance of 5-20mm from the surface of the insulated wire.
7. A method according to claim 3, wherein the plasma jet zone is in the form of a strip, the width of the plasma jet zone being greater than the width of the first or second surface.
8. An insulated wire prepared by the method of any one of claims 1-7;
the insulated wire comprises a conductor bare wire and a PEEK resin insulation layer formed on the periphery of the conductor bare wire;
the surface roughness of the insulated wire is 0.25-0.80 mu m.
9. A coil comprising the insulated wire of claim 8, said coil being subjected to a dip varnish treatment.
10. A surface treatment device for an insulated wire, comprising:
a wire storage guide configured to be rotatable, the insulated wire being wound around the wire storage guide to tension the insulated wire, and to pull the insulated wire, the wire storage guide being rotated to move the insulated wire;
the plasma jet module is used for forming a plasma jet area when the air source is introduced;
the insulated wire passes through the plasma jet area, and the surface of the insulated wire is subjected to plasma jet treatment so as to achieve surface roughening of the insulated wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210447843.0A CN116994831A (en) | 2022-04-26 | 2022-04-26 | Method and device for surface treatment of insulated wire, insulated wire and coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210447843.0A CN116994831A (en) | 2022-04-26 | 2022-04-26 | Method and device for surface treatment of insulated wire, insulated wire and coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116994831A true CN116994831A (en) | 2023-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210447843.0A Pending CN116994831A (en) | 2022-04-26 | 2022-04-26 | Method and device for surface treatment of insulated wire, insulated wire and coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116994831A (en) |
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2022
- 2022-04-26 CN CN202210447843.0A patent/CN116994831A/en active Pending
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