A production method for DC frequency conversion enameled wire

Abstract

The present invention discloses a production method of DC variable frequency enameled wire, which relates to the technical field of transformers. In order to solve the problem that the existing enameled wire needs to be moved repeatedly in the baking and painting equipment, which easily leads to heat leakage, affects the internal heat, and most of the production time is easily wasted in the moving process, the enameled wire cannot be quickly cooled and lubricated with the cooling mechanism after baking and painting, and the overall equipment occupies too much area, which brings inconvenience to users. The following steps are included: Step 1: Paying off the wire; using radial rotary pay-off, over-end or brush pay-off, and brush or double cone sleeve pay-off for large, medium and small spools, respectively, to control the tension of the enameled wire between 20%±5% of the non-extension tension; Step 2: Annealing; using an enameling machine for continuous annealing operation, the maximum annealing temperature is controlled at 500°C, and the annealing furnace adopts a two-stage temperature control form.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a production method of a DC frequency conversion enameled wire. Background Art

[0002] Enameled wire is a main type of winding wire, consisting of a conductor and an insulating layer. The bare wire is annealed and softened, then painted and baked multiple times.

[0003] The existing enameled wire needs to be moved repeatedly in the baking and painting equipment, which easily leads to heat leakage, affects the internal heat, and most of the production time is easily wasted in the moving process. After baking and painting, the enameled wire cannot be quickly cooled and lubricated with the cooling mechanism, and the overall equipment occupies too large an area, which brings inconvenience to users. For this reason, we provide a production method of DC variable frequency enameled wire. Summary of the invention

[0004] The object of the present invention is to provide a production method for DC variable frequency enameled wire to solve the problem proposed in the above background technology that the existing enameled wire needs to be repeatedly moved in the baking and painting equipment, which easily leads to heat leakage and affects the internal heat, and most of the production time is easily wasted in the moving process. After the enameled wire is baked and painted, it cannot be quickly cooled and lubricated with the cooling mechanism, and the overall equipment occupies too large an area, which brings inconvenience to users.

[0005] To achieve the above object, the present invention provides the following technical solution: a production method of a DC variable frequency enameled wire, comprising the following steps:

[0006] Step 1: Paying off the wire; for large, medium and small spools, use radial rotary pay-off, over-end or brush pay-off, and brush or double cone sleeve pay-off respectively to control the tension of the enameled wire to be between 20%±5% of the non-stretching tension;

[0007] Step 2: Annealing: Continuous annealing is performed using an enameling machine. The maximum annealing temperature is controlled at 500°C. The annealing furnace is controlled in two stages, and the temperature control point is selected at a position where the static and dynamic temperatures are similar.

[0008] Step 3: Painting and baking; Turn on the bottom heating device for preheating and heating to increase the temperature inside the device. The wire body is painted at the painting location, and then it is driven by the wire-winding force to move, so that the wire body at the painted location moves to the middle cavity to evaporate the solvent in the paint liquid, and then solidifies to form a paint film, and then drives the wire body to move again to paint again. After the second painting, the wire body moves to the bottom for high-temperature secondary curing, and then the wire body continues to move for subsequent multiple painting and baking operations. During the baking process, the longitudinal temperature is a curve heating, the temperature is from low to high, and then from high to low, and the lateral temperature is a linear uniform heating;

[0009] Step 4: Cooling and lubrication; the wire body is cooled and heat is discharged in the connecting channel, and some impurities on the surface are blown off. The wire body is quickly cooled by the cold air device and multiple cold air blowing devices, and the impurities on the surface can be blown off again during the cooling process. After that, the wire body reaches the lubrication mechanism, and the lubricating oil is attached to its surface through repeated spraying of the lubrication device in the lubrication cavity;

[0010] Step 5: Reel in the wire; use the electric wire-reeling device to reel in the lubricated wire body, and control the reeling position and reeling speed during the reeling process to make the reeling process neat;

[0011] Among them, the step three includes baking and painting equipment, a bottom hot air layer is arranged below the interior of the baking and painting equipment, a hot air blower is arranged at the air inlet end of the bottom hot air layer, two left and right chambers are arranged above the bottom hot air layer, a plurality of painting mechanisms are arranged inside the two chambers, a partition cavity is arranged between the painting mechanisms, a cooling and lubrication mechanism is arranged on one side of the baking and painting equipment, a connecting cavity is arranged between the baking and painting equipment and the cooling and lubrication mechanism, a cold air blower is arranged on one side below the cooling and lubrication mechanism, a plurality of fans are arranged on one side inside the cooling and lubrication mechanism, and a lubrication cylinder is arranged on the other side inside the cooling and lubrication mechanism.

[0012] Preferably, external docking rings are provided on both sides of the painting mechanism, a paint storage tank is provided at the middle position of the external docking ring, a nozzle is provided at one end of the paint storage tank, and a material injection port is provided on the outer wall of one side of the paint storage tank.

[0013] Preferably, an electric telescopic rod is threadedly mounted at a middle position of the outer wall of the outer docking ring, an electric cylinder is provided at one end of the electric telescopic rod, and the electric cylinder is transmission-connected to the outer docking ring via the electric telescopic rod.

[0014] Preferably, a metal mesh plate is arranged below the electric cylinder, and the outer wall of the metal mesh plate is provided with a plurality of through holes for hot air circulation.

[0015] Preferably, a lubricant storage tank is provided on one side of the lubricating cylinder, and an outer wall of the lubricating storage tank on one side close to the lubricating cylinder is provided with two upper and lower support frames for fixing the lubricating cylinder.

[0016] Preferably, a delivery spray pipe is provided at a position near the upper end of the outer wall of the lubricant storage tank, and the spray end of the delivery spray pipe extends to the interior of the lubricating cylinder, a liquid collecting return pipe is provided at a position near the lower end of the outer wall of the lubricating cylinder, and one end of the liquid collecting return pipe extends to the interior of the lubricant storage tank, and a liquid filling pipe is provided at the upper end of the lubricant storage tank.

[0017] Preferably, a hot air traction machine is arranged above the hot air blower, and a hot air circulation pipe is arranged between the hot air blower and the hot air traction machine.

[0018] Preferably, a plurality of exhaust fans are provided on the outer wall of the connecting cavity, an exhaust port is provided on the other side above the cooling and lubrication mechanism, and a cold air circulation pipe is provided between the exhaust port and the connecting cavity.

[0019] Preferably, an inlet terminal is provided at a position above the baking and painting equipment near the left side, and the inlet terminal is connected to the wire-releasing mechanism, an outlet terminal is provided at a position above the cooling and lubricating mechanism near the right side, and the outlet terminal is connected to the wire-receiving mechanism, a plurality of limiting wheels are provided at positions near the bottom inside the baking and painting equipment and the cooling and lubricating mechanism, and traction wheels are provided at positions near the connecting cavity of the baking and painting equipment and the cooling and lubricating mechanism.

[0020] Preferably, the outer walls of the front end surfaces of the baking and painting equipment and the cooling and lubricating mechanism are both installed with switch covers, the outer walls of the switch covers are installed with temperature detectors, and the detection ends of the temperature detectors extend to the interior of the corresponding baking and painting equipment and cooling and lubricating mechanism.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention combines the baking equipment with the painting equipment, so that after the wire body is painted, it can be baked and heated in the interval cavity, and painted for the second time, moved to the bottom for high-temperature baking, and then subsequent multiple painting and baking operations are performed. The baking and painting process can achieve the temperature variation range required for the enameled wire, the longitudinal temperature is a curve heating, the temperature increases from low to high, and then decreases from high to low, and the lateral temperature is a linear uniform heating, so that the quality of the finished product of the enameled wire is improved, and the heating, movement and baking are all carried out internally in the process, which can reduce the heat waste phenomenon and improve the production and processing efficiency; the connecting cavity is provided to play a role in The effect of connecting two devices is achieved, and the wire body is cooled and impurities are removed at the connection point. The cooling device uses a combination of multiple fans and air coolers to achieve rapid cooling, and in the cooling environment, the lubrication mechanism can be used for lubrication. The above process can be realized by connecting the wire-retracting and wire-releasing mechanisms at both ends to realize automatic wire-retracting and wire-releasing operations, so that the wire body can be automatically paid out, painted, baked, impurities removed, cooled, lubricated and wire-retracted by traction during the whole process, making the equipment more convenient to use, and the floor space occupied is much smaller than that of traditional equipment. The structure inside the equipment is also more compact, which improves the production efficiency of the enameled wire.

[0023] The electric cylinder drives the electric telescopic rod to telescope and move, so that the outer docking ring is driven to dock or separate. The paint storage tank is used to store the required paint or paint liquid, and the paint liquid or paint is sprayed onto the surface of the wire body through the nozzle to achieve the effect of painting. In this process, due to the combination of the outer docking ring, the wire body is restricted to the center circle, so that the painting range is more uniform and will not affect the wire reeling movement.

[0024] The lubricant storage tank serves to store lubricant, the support frame is used to position and fix the lubrication cylinder, and the delivery spray pipe serves to deliver the lubricant and spray it onto the surface of the enameled wire. During the spraying process, the liquid falls into the bottom of the cylinder, and part of the liquid is returned through the liquid collection return pipe, so that the lubricant liquid can be used again, achieving the effect of recycling.

[0025] The hot air traction machine captures part of the hot air and sends it to the hot air fan through the hot air circulation pipe, so that the hot air can be recycled and can guide the hot air upward for upper temperature increase. The exhaust fan is used to discharge the internal hot air and impurities into the collection device. The exhaust port is used to discharge the internal cold air and send part of the cold air into the connecting cavity through the cold air circulation pipe, so that the inside of the connecting cavity can be quickly cooled and the discharged cold air can be effectively recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the overall production flow chart of the present invention;

[0027] Figure 2It is a schematic diagram of the structure of the baking and painting equipment and the cooling and lubricating mechanism of the present invention;

[0028] Figure 3 It is a schematic diagram of the internal structure of the baking and painting equipment of the present invention;

[0029] Figure 4 It is a schematic diagram of the internal structure of the cooling and lubrication mechanism of the present invention;

[0030] Figure 5 It is a schematic diagram of the partial structure of the painting mechanism of the present invention;

[0031] In the figure: 1. baking and painting equipment; 2. inlet end; 3. hot air blower; 4. hot air traction machine; 5. hot air circulation pipe; 6. switch cover; 7. connecting chamber; 8. exhaust fan; 9. cooling and lubrication mechanism; 10. cold air blower; 11. exhaust port; 12. outlet end; 13. electric cylinder; 14. electric telescopic rod; 15. painting mechanism; 16. metal mesh plate; 17. partition cavity; 18. bottom hot air layer; 19. limiting wheel; 20. traction wheel; 21. fan; 22. external docking ring; 23. paint storage tank; 24. lubricant storage tank; 25. support frame; 26. lubrication cylinder; 27. conveying spray pipe; 28. liquid collecting reflux pipe; 29. ​​liquid adding pipe; 30. nozzle; 31. injection port; 32. temperature detector; 33. cold air circulation pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See also Figure 1-5 , an embodiment provided by the present invention: a method for producing a DC variable frequency enameled wire, comprising the following steps:

[0034] Step 1: Paying off the wire; for large, medium and small spools, use radial rotary pay-off, over-end or brush pay-off, and brush or double cone sleeve pay-off respectively to control the tension of the enameled wire to be between 20%±5% of the non-stretching tension;

[0035] Step 2: Annealing: Continuous annealing is performed using an enameling machine. The maximum annealing temperature is controlled at 500°C. The annealing furnace is controlled in two stages, and the temperature control point is selected at a position where the static and dynamic temperatures are similar.

[0036] Step 3: Painting and baking; Turn on the bottom heating device for preheating and heating to increase the temperature inside the device. The wire body is painted at the painting location, and then it is driven by the wire-winding force to move, so that the wire body at the painted location moves to the middle cavity to evaporate the solvent in the paint liquid, and then solidifies to form a paint film, and then drives the wire body to move again to paint again. After the second painting, the wire body moves to the bottom for high-temperature secondary curing, and then the wire body continues to move for subsequent multiple painting and baking operations. During the baking process, the longitudinal temperature is a curve heating, the temperature is from low to high, and then from high to low, and the lateral temperature is a linear uniform heating;

[0037] Step 4: Cooling and lubrication; the wire body is cooled and heat is discharged in the connecting channel, and some impurities on the surface are blown off. The wire body is quickly cooled by the cold air device and multiple cold air blowing devices, and the impurities on the surface can be blown off again during the cooling process. After that, the wire body reaches the lubrication mechanism, and the lubricating oil is attached to its surface through repeated spraying of the lubrication device in the lubrication cavity;

[0038] Step 5: Reel in the wire; use the electric wire-reeling device to reel in the lubricated wire body, and control the reeling position and reeling speed during the reeling process to make the reeling process neat;

[0039] Among them, the step three includes a baking and painting equipment 1, a bottom hot air layer 18 is arranged at the bottom of the baking and painting equipment 1, a hot air blower 3 is arranged at the air inlet end of the bottom hot air layer 18, and two left and right chambers are arranged above the bottom hot air layer 18, and multiple painting mechanisms 15 are arranged inside the two chambers, and a partition cavity 17 is arranged between the painting mechanisms 15. A cooling and lubrication mechanism 9 is arranged on one side of the baking and painting equipment 1, and a connecting cavity 7 is arranged between the baking and painting equipment 1 and the cooling and lubrication mechanism 9. A cold air blower 10 is arranged on one side below the cooling and lubrication mechanism 9, and multiple fans 21 are arranged on one side inside the cooling and lubrication mechanism 9, and a lubrication cylinder 26 is arranged on the other side inside the cooling and lubrication mechanism 9.

[0040] See also Figure 3 , Figure 5 , external docking rings 22 are provided on both sides of the painting mechanism 15, a paint storage tank 23 is provided at the middle position of the external docking ring 22, a nozzle 30 is provided at one end of the paint storage tank 23, and a filling port 31 is provided on the outer wall of one side of the paint storage tank 23. The paint storage tank 23 is used to store required paint or paint liquid, and the paint liquid or paint is sprayed onto the surface of the wire body through the nozzle 30 to achieve the effect of painting. In this process, due to the combination of the external docking ring 22, the wire body is restricted to the center circle, so that the painting range is more uniform and will not affect the wire body reeling movement.

[0041] See also Figure 3 , Figure 5An electric telescopic rod 14 is threadedly installed at the middle position of the outer wall of the outer docking ring 22. An electric cylinder 13 is provided at one end of the electric telescopic rod 14, and the electric cylinder 13 is transmission-connected with the outer docking ring 22 through the electric telescopic rod 14. The electric cylinder 13 drives the electric telescopic rod 14 to telescopically move, so that the outer docking ring 22 is driven to perform docking or separation operations.

[0042] See also Figure 3 A metal mesh plate 16 is arranged below the electric cylinder 13, and a plurality of through holes for hot air circulation are arranged on the outer wall of the metal mesh plate 16. The metal mesh plate 16 plays the role of hot air circulation, so that the internal hot air can heat the enameled wire.

[0043] See also Figure 4 A lubricant storage tank 24 is provided on one side of the lubricating cylinder 26 , and two upper and lower support frames 25 for fixing the lubricating cylinder 26 are provided on the outer wall of the lubricating cylinder 24 close to the lubricating cylinder 26 . The lubricating cylinder 24 serves to store lubricant, and the support frames 25 are used to position and fix the lubricating cylinder 26 .

[0044] See also Figure 4 A delivery spray pipe 27 is provided at a position near the upper end of the outer wall of the lubricant storage tank 24, and the spray end of the delivery spray pipe 27 extends to the interior of the lubricating cylinder 26. A liquid collecting return pipe 28 is provided at a position near the lower end of the outer wall of the lubricating cylinder 26, and one end of the liquid collecting return pipe 28 extends to the interior of the lubricant storage tank 24. A liquid adding pipe 29 is provided at the upper end of the lubricant storage tank 24. The delivery spray pipe 27 serves to transport the lubricant and spray it onto the surface of the enameled wire. During the spraying process, the liquid falls into the lower part of the cylinder, and part of the liquid is refluxed through the liquid collecting return pipe 28, so that the lubricant liquid can be used again, thereby achieving a recycling effect.

[0045] See also Figure 2 A hot air traction machine 4 is arranged above the hot air blower 3, and a hot air circulation pipe 5 is arranged between the hot air blower 3 and the hot air traction machine 4. The hot air traction machine 4 captures part of the hot air and sends it to the hot air blower 3 through the hot air circulation pipe 5, so that the hot air can be circulated.

[0046] See also Figure 2 A plurality of exhaust fans 8 are arranged on the outer wall of the connecting cavity 7, an exhaust port 11 is arranged on the other side above the cooling and lubrication mechanism 9, a cold air circulation pipe 33 is arranged between the exhaust port 11 and the connecting cavity 7, the exhaust fan 8 is used to discharge the internal hot air and impurities into the collecting device, the exhaust port 11 is used to discharge the internal cold air, and part of the cold air is sent into the connecting cavity 7 through the cold air circulation pipe 33, so that the inside of the connecting cavity 7 can be quickly cooled down, and the discharged cold air can be effectively recycled.

[0047] See also Figure 2A wire inlet terminal 2 is provided at a position near the left side above the baking and painting equipment 1, and the wire inlet terminal 2 is connected to the wire unwinding mechanism, a wire outlet terminal 12 is provided at a position near the right side above the cooling and lubricating mechanism 9, and the wire outlet terminal 12 is connected to the wire rewinding mechanism, a plurality of limiting wheels 19 are provided at positions near the bottom inside the baking and painting equipment 1 and the cooling and lubricating mechanism 9, and a traction wheel 20 is provided at a position near the connecting cavity 7 of the baking and painting equipment 1 and the cooling and lubricating mechanism 9, and the limiting wheel 19 has the effect of limiting the moving position of the enameled wire.

[0048] See also Figure 2 The outer walls of the baking and painting equipment 1 and the front end surfaces of the cooling and lubricating mechanism 9 are both installed with switch cover plates 6, and the outer walls of the switch cover plates 6 are installed with temperature detectors 32, and the detection ends of the temperature detectors 32 extend to the interior of the corresponding baking and painting equipment 1 and the cooling and lubricating mechanism 9. The temperature detectors 32 have the effect of detecting internal temperature data, which is convenient for users to accurately control the internal temperature. The switch cover plates 6 are convenient for users to inspect and replace internal components.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for producing a DC frequency conversion enameled wire, characterized in that: The following steps are involved: Step 1: Paying off the wire; for large, medium and small spools, use radial rotary pay-off, over-end or brush pay-off, and brush or double cone sleeve pay-off respectively to control the tension of the enameled wire to be between 20%±5% of the non-stretching tension; Step 2: Annealing: Continuous annealing is performed using an enameling machine. The maximum annealing temperature is controlled at 500°C. The annealing furnace is controlled in two stages, and the temperature control point is selected at a position where the static and dynamic temperatures are similar. Step 3: Painting and baking; Turn on the bottom heating device for preheating and heating to increase the temperature inside the device. The wire body is painted at the painting location, and then it is driven by the wire-winding force to move, so that the wire body at the painted location moves to the middle cavity to evaporate the solvent in the paint liquid, and then solidifies to form a paint film, and then drives the wire body to move again to paint again. After the second painting, the wire body moves to the bottom for high-temperature secondary curing, and then the wire body continues to move for subsequent multiple painting and baking operations. During the baking process, the longitudinal temperature is a curve heating, the temperature is from low to high, and then from high to low, and the lateral temperature is a linear uniform heating; Step 4: Cooling and lubrication; the wire body is cooled and heat is discharged in the connecting channel, and some impurities on the surface are blown off. The wire body is quickly cooled by the cold air device and multiple cold air blowing devices, and the impurities on the surface can be blown off again during the cooling process. After that, the wire body reaches the lubrication mechanism, and the lubricating oil is attached to its surface through repeated spraying of the lubrication device in the lubrication cavity; Step 5: Reel in the wire; use the electric wire-reeling device to reel in the lubricated wire body, and control the reeling position and reeling speed during the reeling process to make the reeling process neat; The step three comprises a baking and painting device (1), wherein a bottom hot air layer (18) is arranged below the inside of the baking and painting device (1), a hot air blower (3) is arranged at the air inlet end of the bottom hot air layer (18), and two left and right chambers are arranged above the bottom hot air layer (18), and a plurality of painting mechanisms (15) are arranged inside the two chambers, and a partition chamber (17) is arranged between the painting mechanisms (15). A cooling and lubricating mechanism (9) is arranged on one side of the baking and painting device (1), and a connecting chamber (7) is arranged between the baking and painting device (1) and the cooling and lubricating mechanism (9). A cooling air blower (10) is arranged on one side below the cooling and lubricating mechanism (9), a plurality of fans (21) are arranged on one side inside the cooling and lubricating mechanism (9), and a lubricating cylinder (26) is arranged on the other side inside the cooling and lubricating mechanism (9).

2. The method for producing a DC frequency conversion enameled wire according to claim 1, characterized in that: External docking rings (22) are provided on both sides of the painting mechanism (15), a paint storage tank (23) is provided at the middle position of the external docking ring (22), a nozzle (30) is provided at one end of the paint storage tank (23), and a material injection port (31) is provided on the outer wall of one side of the paint storage tank (23).

3. The method for producing a DC frequency conversion enameled wire according to claim 2, characterized in that: An electric telescopic rod (14) is threadedly mounted at a middle position of the outer wall of the outer docking ring (22); an electric cylinder (13) is provided at one end of the electric telescopic rod (14); and the electric cylinder (13) is transmission-connected to the outer docking ring (22) via the electric telescopic rod (14).

4. The method for producing a DC frequency conversion enameled wire according to claim 3, characterized in that: A metal mesh plate (16) is provided below the electric cylinder (13), and a plurality of through holes for hot air circulation are provided on the outer wall of the metal mesh plate (16).

5. The method for producing a DC frequency conversion enameled wire according to claim 1, characterized in that: A lubricant storage tank (24) is provided on one side of the lubricating cylinder (26), and two upper and lower support frames (25) for fixing the lubricating cylinder (26) are provided on an outer wall of a side of the lubricating cylinder (24) close to the lubricating cylinder (26).

6. The method for producing a DC frequency conversion enameled wire according to claim 5, characterized in that: A delivery spray pipe (27) is provided at a position near the upper end of the outer wall of the lubricant storage tank (24), and the spray end of the delivery spray pipe (27) extends to the interior of the lubricating cylinder (26); a liquid collecting return pipe (28) is provided at a position near the lower end of the outer wall of the lubricating cylinder (26), and one end of the liquid collecting return pipe (28) extends to the interior of the lubricant storage tank (24); and a liquid adding pipe (29) is provided at the upper end of the lubricant storage tank (24).

7. The method for producing a DC frequency conversion enameled wire according to claim 1, characterized in that: A hot air traction machine (4) is arranged above the hot air blower (3), and a hot air circulation pipe (5) is arranged between the hot air blower (3) and the hot air traction machine (4).

8. The method for producing a DC frequency conversion enameled wire according to claim 1, characterized in that: The outer wall of the connecting cavity (7) is provided with a plurality of exhaust fans (8), the other side above the cooling and lubricating mechanism (9) is provided with an exhaust port (11), and a cold air circulation pipe (33) is provided between the exhaust port (11) and the connecting cavity (7).

9. The method for producing a DC frequency conversion enameled wire according to claim 1, characterized in that: A wire inlet (2) is provided at a position above the baking and painting equipment (1) near the left side, and the wire inlet (2) is connected to a wire unwinding mechanism; a wire outlet (12) is provided at a position above the cooling and lubricating mechanism (9) near the right side, and the wire outlet (12) is connected to a wire rewinding mechanism; a plurality of limiting wheels (19) are provided at positions near the bottom inside the baking and painting equipment (1) and the cooling and lubricating mechanism (9); and a traction wheel (20) is provided at positions near the connecting cavity (7) inside the baking and painting equipment (1) and the cooling and lubricating mechanism (9).

10. The method for producing a DC frequency conversion enameled wire according to claim 1, characterized in that: The outer walls of the front end surfaces of the baking and painting equipment (1) and the cooling and lubricating mechanism (9) are both installed with switch covers (6), and the outer walls of the switch covers (6) are installed with temperature detectors (32), and the detection ends of the temperature detectors (32) extend into the interior of the corresponding baking and painting equipment (1) and the cooling and lubricating mechanism (9).

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