CN110911053A

CN110911053A - Manufacturing method of enameled wire for network transformer

Info

Publication number: CN110911053A
Application number: CN201911220738.8A
Authority: CN
Inventors: 沈嘉诚
Original assignee: Huzhou Zhongzhou Electromagnetic Wire Co Ltd
Current assignee: Huzhou Zhongzhou Electromagnetic Wire Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-03-24

Abstract

The invention discloses a method for manufacturing an enameled wire for a network transformer, which relates to the related technical field of enameled wire production and comprises the following steps: a: material selection and B: drawing and C: cleaning and D: annealing: annealing the semi-finished wire twice in an annealing furnace by adopting a non-contact annealing method, and E: painting: and (3) painting the semi-finished wire twice by using a painting device, F: curing and G: detection and H: oiling and I: and (6) taking up the wire. According to the invention, nitrogen is used as protective gas, so that the copper wire at high temperature is not contacted with oxygen in the air, and the nitrogen is used as protective gas, so that the elongation of the product is better compared with steam, and the generation of copper oxide can be effectively avoided, thereby ensuring the flexibility, thermal shock and thermal aging performance of the enameled wire and improving the quality of the enameled wire. Through the cooperation setting between felt ring, cotton layer, solid fixed ring, a fixed section of thick bamboo and the motor, can drive felt ring and cotton layer and rotate for it is more even to paint.

Description

Manufacturing method of enameled wire for network transformer

Technical Field

The invention relates to the related technical field of enameled wire production, in particular to a manufacturing method of an enameled wire for a network transformer.

Background

The enameled wire is a main variety of winding wires and consists of a conductor and an insulating layer, and a bare wire is annealed and softened and then is subjected to painting and baking for multiple times. However, it is not easy to produce a product which meets both the standard requirements and the customer requirements, and it is influenced by the quality of raw materials, process parameters, production equipment, environment and other factors, so that the quality characteristics of various enameled wires are different, but the enameled wires have four properties of mechanical properties, chemical properties, electrical properties and thermal properties.

At present, the flexibility, thermal shock and thermal aging performance of the conventional enameled wire for the network transformer are too poor, so that the service life of a circuit is influenced, and the surface painting of the enameled wire is uneven, so that the insulativity and the electrical property of the enameled wire are influenced.

Therefore, it is necessary to provide a method for manufacturing an enameled wire for a network transformer to solve the above problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a method for manufacturing an enameled wire for a network transformer, which solves the problems of poor flexibility, thermal shock and thermal aging performance of the enameled wire for the network transformer and uneven surface painting of the enameled wire.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

a manufacturing method of an enameled wire for a network transformer comprises the following steps:

a: selecting materials: taking a copper rod with the diameter of 5mm as a raw material, wherein the copper rod is low-oxygen copper with the purity of more than 99.9 percent;

b: drawing: firstly, drawing a copper rod on a large wire drawing machine for multiple times of large drawing to obtain a wire rod with the thickness of 0.1mm, and then carrying out multiple times of large drawing on the wire rod through a fine wire drawing machine to obtain a semi-finished wire rod with the thickness of 0.05 mm;

c: cleaning: cleaning the drawn semi-finished wire rod to remove oil stains on the surface;

d: annealing: annealing the semi-finished wire twice in an annealing furnace by adopting a non-contact annealing method, and sealing a wire inlet of the annealing furnace in a nitrogen sealing mode;

e: painting: painting the semi-finished wire twice by using a painting device;

f: and (3) curing: putting the semi-finished wire into a baking furnace for evaporation and solidification to form a paint film on the outer layer of the wire;

g: and (3) detection: carrying out curing detection on the wire by using a medium loss spectrum method, wherein the temperature in the medium loss spectrum is 160-170 ℃;

h: oiling: lubricating oil is coated on the surface of the semi-finished wire, so that the enameled wire can be paid off at high speed in the winding process;

i: taking up: the enameled wire is continuously, tightly and uniformly wound on the disc through the wire take-up device.

Optionally, the painting device is including processing the case, the top fixedly connected with paint box and the pump machine of processing the case, the inside of processing the case is equipped with the paint box, one side fixedly connected with fixing base of paint box, the bottom fixedly connected with motor of fixing base, the inside of paint box is equipped with the felt loop, the inboard fixedly connected with cotton layer of felt loop, the cotton layer is the annular, the solid fixed ring of the equal fixedly connected with in both ends of felt loop, solid fixed ring's middle part fixedly connected with solid fixed cylinder, gu fixed cylinder keeps away from solid fixed ring's one end and runs through paint box and fixedly connected with transmission gear, gu fixed cylinder rotates with the paint box to be connected, the top intercommunication of paint box has defeated lacquer pipe.

Optionally, the temperature of the two annealing in the step D is 400 to 440 ℃ and 340 to 380 ℃.

Optionally, the materials in the two paints in the step E are respectively a polyester imide paint and a self-lubricating insulating paint.

Optionally, the lubricating grease in the step H comprises 80% of 120# solvent oil, 15% of 7# white mineral oil and 5% of general-purpose lubricant.

Optionally, a wire inlet is formed in one end of the processing box, a wire outlet is formed in the other end of the processing box, and guide wheels are mounted on the outer sides of the wire inlet and the wire outlet.

Optionally, the bottom end of the paint conveying pipe is connected with the felt ring in a fitting mode, the top end of the paint conveying pipe penetrates through the processing box and is communicated with the output end of the pump, and the input end of the pump is communicated with the paint box.

Optionally, a gear is fixedly connected to an output shaft of the motor, and the transmission gear is engaged with the gear on the motor.

Optionally, the bottom of scribbling the lacquer case passes through support column and processing case fixed connection, the bottom of scribbling the lacquer case is connected with row's material pipe, it is connected with external collecting box to arrange the material pipe.

Optionally, the fixed cylinder is rotationally connected with the painting box through a sealing bearing, and the inner diameter of the fixed ring is equal to that of the fixed cylinder.

(III) advantageous effects

The invention provides a method for manufacturing an enameled wire for a network transformer, which has the following beneficial effects:

(1) according to the invention, nitrogen is used as protective gas, so that the copper wire at high temperature is not contacted with oxygen in the air, and the nitrogen is used as protective gas, so that the elongation of the product is better compared with that of steam, and the generation of copper oxide can be effectively avoided, thereby ensuring the flexibility, thermal shock and thermal aging performance of the enameled wire and improving the quality of the enameled wire.

(2) The felt and the cotton cloth are painted, the felt is loose, soft, elastic and porous, and absorbs, stores, conveys and makes up the paint liquid by capillary phenomenon, and the surface of the wire is painted with the uniform paint liquid.

(3) The invention adopts the cooperation of 120# solvent oil, 7# white mineral oil and a universal lubricant, can enhance the surface lubrication of the product and reduce the friction coefficient.

(4) According to the invention, the felt ring, the cotton cloth layer, the fixing ring, the fixing cylinder and the motor are arranged in a matching manner, so that the felt ring and the cotton cloth layer can be driven to rotate, and the painting is more uniform.

Drawings

FIG. 1 is a schematic front view of a painting installation according to the invention;

FIG. 2 is a schematic cross-sectional view of the painting apparatus of the present invention;

FIG. 3 is a schematic cross-sectional view of the paint booth of the present invention;

fig. 4 is a schematic perspective view of a felt ring of the present invention.

In the figure: 1. a processing box; 2. a guide wheel; 3. a paint box; 4. a pump machine; 5. painting box; 6. a support pillar; 7. a fixed seat; 8. a motor; 9. a felt ring; 10. a cotton cloth layer; 11. a fixing ring; 12. fixing the rod; 13. a fixed cylinder; 14. sealing the bearing; 15. a transmission gear; 16. a paint conveying pipe; 17. a wire inlet; 18. and (6) an outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected or detachably connected; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example one

d: annealing: annealing the semi-finished wire twice in an annealing furnace by adopting a non-contact annealing method, wherein the annealing temperature for twice is 400 ℃ and 340 ℃, and a wire inlet of the annealing furnace is sealed by adopting a nitrogen sealing mode;

e: painting: painting the semi-finished wire twice by using a painting device, wherein the materials in the painting twice are respectively polyester imide paint and self-lubricating insulating paint;

g: and (3) detection: carrying out curing detection on the wire by using a medium loss spectrum method, wherein the temperature in the medium loss spectrum is 160 ℃;

h: oiling: lubricating oil is coated on the surface of the semi-finished wire, and the lubricating oil comprises 80% of 120# solvent oil, 15% of 7# white mineral oil and 5% of universal lubricant, so that the enameled wire can be paid off at high speed in the winding process;

Example two

d: annealing: annealing the semi-finished wire twice in an annealing furnace by adopting a non-contact annealing method, wherein the annealing temperature for twice is 420 ℃ and 360 ℃, and a wire inlet of the annealing furnace is sealed by adopting a nitrogen sealing mode;

g: and (3) detection: carrying out curing detection on the wire by using a medium loss spectrum method, wherein the temperature in the medium loss spectrum is 165 ℃;

EXAMPLE III

d: annealing: annealing the semi-finished wire twice in an annealing furnace by adopting a non-contact annealing method, wherein the annealing temperature for twice is 440 ℃ and 380 ℃, and a wire inlet of the annealing furnace is sealed by adopting a nitrogen sealing mode;

g: and (3) detection: carrying out curing detection on the wire by using a medium loss spectrum method, wherein the temperature in the medium loss spectrum is 170 ℃;

The enameled wire for the network transformer can be prepared by the three groups of embodiments, wherein the enameled wire for the network transformer prepared by the second group of embodiments has the best effect.

As an optional technical scheme of the invention:

the painting device comprises a processing box 1, as shown in figures 1-4, a paint box 3 and a pump 4 are fixedly connected to the top end of the processing box 1, a painting box 5 is arranged inside the processing box 1, a fixing seat 7 is fixedly connected to one side of the painting box 5, a motor 8 is fixedly connected to the bottom end of the fixing seat 7, a felt ring 9 is arranged inside the painting box 5, a cotton cloth layer 10 is fixedly connected to the inner side of the felt ring 9, the cotton cloth layer 10 is annular, fixing rings 11 are fixedly connected to both ends of the felt ring 9, a fixing cylinder 13 is fixedly connected to the middle of the fixing ring 11, one end of the fixing cylinder 13, far away from the fixing ring 11, penetrates through the painting box 5 and is fixedly connected with a transmission gear 15, the fixing cylinder 13 is rotatably connected with the painting box 5, the felt ring 9, the cotton cloth layer 10, the fixing ring 11, the fixing cylinder 13 and the motor 8 are matched to drive the felt ring 9 and the cotton, make the japanning more even, the top intercommunication of painting case 5 has defeated lacquer pipe 16, and the inside fixedly connected with dead lever 12 of felt ring 9, the both ends of dead lever 12 all with solid fixed ring 11 fixed connection, dead lever 12 is used for being connected felt ring 9 and the solid fixed ring 11 in both ends as a whole, has guaranteed the stability of device when rotatory.

As an optional technical scheme of the invention:

an inlet 17 is arranged at one end of the processing box 1, an outlet 18 is arranged at the other end of the processing box 1, and guide wheels 2 are arranged on the outer sides of the inlet 17 and the outlet 18.

As an optional technical scheme of the invention:

the bottom end of the paint conveying pipe 16 is connected with the felt ring 9 in an attaching mode, most of paint can enter the felt ring 9, the top end of the paint conveying pipe 16 penetrates through the processing box 1 and is communicated with the output end of the pump 4, and the input end of the pump 4 is communicated with the paint box 3.

As an optional technical scheme of the invention:

the output shaft of the motor 8 is fixedly connected with a gear, and the transmission gear 15 is meshed with the gear on the motor 8.

As an optional technical scheme of the invention:

support column 6 and processing case 1 fixed connection are passed through to the bottom of painting case 5, and the bottom of painting case 5 is connected with row's material pipe, arranges the material pipe and is connected with external collecting box, arranges the material pipe because discharge felt ring 9 for inspiratory paint, avoids unnecessary paint to spill in painting case 5.

As an optional technical scheme of the invention:

the fixed cylinder 13 is rotatably connected with the painting box 5 through a sealing bearing 14, and the inner diameter of the fixed ring 11 is equal to that of the fixed cylinder 13.

The working principle is as follows: during operation, a wire passes through the wire inlet 17, then sequentially passes through the fixed cylinder 13 at the left end of the painting box 5, the cotton cloth layer 10 and the fixed cylinder 13 at the right end of the painting box 5, and finally passes out of the wire outlet 18, when painting is performed, the pump machine 4 is started, the pump machine 4 guides paint in the painting box 3 into the felt ring 9 through the paint conveying pipe 16, the felt ring 9 transfers the paint into the cotton cloth layer 10, the motor 8 is started, the motor 8 drives the fixed cylinder 13 to rotate through the transmission gear 15, the fixed cylinder 13 drives the felt ring 9 and the cotton cloth layer 10 to rotate through the fixed ring 11, the wire is subjected to rotary painting, and redundant paint flows out of the discharging pipe and enters the external collecting box.

In summary, the following steps: according to the manufacturing method of the enameled wire for the network transformer, nitrogen is used as protective gas, so that a copper wire at high temperature is not in contact with oxygen in the air, the nitrogen is used as the protective gas, the elongation of the product is better relative to steam, copper oxide can be effectively avoided, the flexibility, thermal shock and thermal aging performance of the enameled wire can be guaranteed, the quality of the enameled wire is improved, felt and cotton cloth materials are adopted for painting, the felt is loose, soft, elastic and porous, the capillary phenomenon is absorbed, stored, conveyed and made up for paint liquid, the surface of the wire is coated with uniform paint liquid, and the cooperation of 120# solvent oil, 7# white mineral oil and a universal lubricant is adopted, so that the surface lubrication of the product can be enhanced, and the friction coefficient is reduced.

It is noted that in the present disclosure, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A manufacturing method of an enameled wire for a network transformer is characterized by comprising the following steps:

e: painting: painting the semi-finished wire twice by using a painting device;

2. The method for manufacturing the enameled wire for the network transformer according to claim 1, wherein the method comprises the following steps:

the painting device comprises a processing box (1), wherein a paint box (3) and a pump machine (4) are fixedly connected to the top end of the processing box (1), a paint box (5) is arranged inside the processing box (1), a fixing seat (7) is fixedly connected to one side of the paint box (5), a motor (8) is fixedly connected to the bottom end of the fixing seat (7), a felt ring (9) is arranged inside the paint box (5), a cotton cloth layer (10) is fixedly connected to the inner side of the felt ring (9), the cotton cloth layer (10) is annular, fixing rings (11) are fixedly connected to the two ends of the felt ring (9), a fixing cylinder (13) is fixedly connected to the middle of the fixing rings (11), one end, far away from the fixing rings (11), of the fixing cylinder (13) penetrates through the paint box (5) and is fixedly connected with a transmission gear (15), and the fixing cylinder (13) is rotatably connected with the paint box (5), the top end of the paint coating box (5) is communicated with a paint conveying pipe (16).

3. The method for manufacturing the enameled wire for the network transformer according to claim 1, wherein the method comprises the following steps:

the temperature of the two times of annealing in the step D is 400-440 ℃ and 340-380 ℃.

4. The method for manufacturing the enameled wire for the network transformer according to claim 1, wherein the method comprises the following steps:

and E, respectively preparing polyester imide paint and self-lubricating insulating paint as materials in the two-time painting in the step E.

5. The method for manufacturing the enameled wire for the network transformer according to claim 1, wherein the method comprises the following steps:

and the lubricating grease in the step H comprises 80% of 120# solvent oil, 15% of 7# white mineral oil and 5% of general-purpose lubricant.

6. The method for manufacturing the enameled wire for the network transformer according to claim 2, wherein the method comprises the following steps:

an inlet (17) is arranged at one end of the processing box (1), an outlet (18) is arranged at the other end of the processing box (1), and guide wheels (2) are arranged on the outer sides of the inlet (17) and the outlet (18).

7. The method for manufacturing the enameled wire for the network transformer according to claim 2, wherein the method comprises the following steps:

the bottom end of the paint conveying pipe (16) is attached to the felt ring (9), the top end of the paint conveying pipe (16) penetrates through the processing box (1) and is communicated with the output end of the pump (4), and the input end of the pump (4) is communicated with the paint box (3).

8. The method for manufacturing the enameled wire for the network transformer according to claim 2, wherein the method comprises the following steps:

the output shaft of the motor (8) is fixedly connected with a gear, and the transmission gear (15) is meshed with the gear on the motor (8).

9. The method for manufacturing the enameled wire for the network transformer according to claim 2, wherein the method comprises the following steps:

the bottom of scribbling lacquer case (5) passes through support column (6) and processing case (1) fixed connection, the bottom of scribbling lacquer case (5) is connected with row's material pipe, it is connected with external collecting box to arrange the material pipe.

10. The method for manufacturing the enameled wire for the network transformer according to claim 2, wherein the method comprises the following steps:

fixed cylinder (13) are connected with painting case (5) rotation through sealed bearing (14), the internal diameter of fixed ring (11) and fixed cylinder (13) equals.