A method for curing the insulating paint dripping on the stator core of a motor

Abstract

The invention discloses a method for curing insulating paint dripping of a motor stator core, which belongs to the technical field of motor stator processing methods, and comprises the following steps: step (A) dripping paint feeding; step (B) preheating of dripping paint; step (C) dripping paint: after heating up a flat wire stator assembly, the flat wire stator assembly is transported to a dripping position, the dripping position is provided with a glue dripping port, and the flat wire stator assembly is dripped with paint; step (D) gelling; step (E) coating feeding; step (F) preheating of coating; step (G) coating; step (H) curing: the flat wire stator assembly is transported to a curing area, and the insulating paint and coating powder are heated and cured at the same time; step (I) unloading and cooling. According to the invention, insulating paint is attached to the core slot of the flat wire stator assembly, the filling effect in the core slot is good, the insulating paint completely fixes the flat wire and the insulating paper, and the flat wire is prevented from shaking in the stator core slot, and the insulating paint and the coating layer are cured at the same time, so as to improve the product quality and the production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of motor stator assembly manufacturing methods, relates to the field of motor insulation methods, and specifically relates to a motor stator iron core insulation paint dripping and curing method. Background Art

[0002] The windings between the flat wire and the stator core of the new energy vehicle motor are usually insulated with insulating paper, which is then impregnated with insulating varnish. After curing, the flat wire is fixed to form a strong overall structure. However, during the use of the motor, the existing insulating varnishes are mostly impregnated. Bubbles are easily generated in the stator slot during the impregnation process, and there are gaps between the insulating paper and the flat wire. During long-term use, the flat wire will shake in the stator slot, affecting the quality of the motor and shortening the life of the motor.

[0003] In the prior art, insulating paper is fixed by a commonly used paint dripping method. The invention patent with publication number CN118300300A discloses a method for implementing the winding structure of a flat wire motor. The invention patent discloses a method for implementing the winding structure of a flat wire motor, which relates to the technical field of flat wire motors. A winding structure of a flat wire motor, wherein the copper wire welding end of the motor stator is twisted and then the copper wire is cut off on the outside of the insulating paint. After cutting, the two copper wire ends at the joint are in the same plane and the sides are in contact with each other. The two cut copper wires are then welded at the ends to be welded into one piece; the copper wire after welding is insulated by paint dripping; its main implementation process includes stator core wiring, insulating paper insertion, hairpin wire insertion into the core, copper wire expansion, copper wire twisting, copper wire welding, paint dripping insulation, electrical testing, and stator assembly offline.

[0004] In the prior art, a common paint dripping method is loading, preheating, paint dripping, gelling, curing, coating, curing, unloading and cooling. Curing is performed after paint dripping and coating respectively. Multiple heating will affect product quality and reduce production efficiency. Summary of the invention

[0005] The purpose of the present invention is to overcome the technical problems in the prior art of the flat wire stator assembly insulating paint dripping method that multiple curing affects the quality of the flat wire stator assembly and reduces production efficiency, and to provide a paint dripping method.

[0006] In order to solve the above technical problems, the present invention provides a method for curing the insulating paint of a stator core of a motor, and the method comprises the following steps:

[0007] Step (A), paint dripping and loading: loading the flat wire stator assembly onto the paint dripping equipment, weighing the flat wire stator assembly by a manipulator, and installing the flat wire stator assembly on the paint dripping equipment after weighing.

[0008] Step (B), paint preheating: the paint dripping equipment includes a preheating furnace and a conveying device. The flat wire stator assembly is driven by the conveying device into the preheating furnace. The preheating furnace heats up the flat wire stator assembly. Before dripping the paint, in order to ensure the quality of the paint dripping and the fluidity of the paint body, the flat wire stator assembly needs to be heated.

[0009] Step (C), paint dripping: the paint dripping equipment also includes a paint dripping device, the paint dripping device has a paint dripping position, the flat wire stator assembly is transported to the paint dripping position after being heated, the paint dripping position is provided with a glue dripping port, when dripping paint, the flat wire stator assembly is placed horizontally, and paint is dripped on one side first, and after the paint dripping on one side is completed, it is transferred to the next station to drip paint on the other side, and the insulating paint flows out from the paint dripping port, and the paint dripping port includes an outer diameter paint dripping port and an inner diameter paint dripping port, the outer diameter paint dripping port is located on the outer side of the outer diameter, and the inner diameter paint dripping port is located on the inner side of the inner diameter, when dripping paint, the flat wire stator assembly is tilted upward near the paint dripping port, the flat wire stator assembly performs a rotational motion, and the insulating paint flows out from the paint dripping port and flows to the lower end of the flat wire stator assembly, and dripping paint on both sides can ensure uniform coating.

[0010] Step (D), gelling: After the paint dripping is completed, the flat wire stator assembly is transported to the gelling area, and the flat wire stator assembly is heated and gelled. In order to ensure the uniformity and stability of the thickness of the insulating paint, the insulating paint needs to be gelled after the paint dripping.

[0011] Step (E), coating and loading: clamping the flat wire stator assembly to the coating and loading station, and installing the flat wire stator assembly on the coating and loading station by a robot.

[0012] Step (F), coating preheating: the flat wire stator assembly automatically moves to the heating position for heating, so that the flat wire stator assembly reaches the coating temperature.

[0013] Step (G), coating: immersing the flat wire stator assembly into coating powder according to set parameters, coating the flat wire stator assembly, grabbing the flat wire stator assembly with a robot, and immersing the flat wire stator assembly into the coating powder.

[0014] Step (H), curing: the flat wire stator assembly is transported to the curing area, and the insulating paint and the coating powder are cured by heating at the same time.

[0015] Step (I), unloading and cooling: after solidification is completed, the flat wire stator assembly is transferred to a cooling zone for cooling.

[0016] This method can greatly improve the filling rate of the slots of the flat wire motor stator assembly, reduce the gap between the flat wire and the insulating paper in the flat wire stator assembly, avoid the generation of bubbles in the insulating paint, improve product quality, and reduce operating noise. At the same time, this method integrates the original two curing steps of dripping paint and coating into one, thereby improving production efficiency and optimizing product quality.

[0017] In step (B), after the flat wire stator assembly enters the preheating furnace, the flat wire stator assembly is heated to 80°C-110°C, and the preheating time is 40-70 minutes. In order to ensure the fluidity of the insulating paint during paint dripping, the flat wire stator assembly is heated to 80°C-110°C during preheating, and the preheating time is 40-70 minutes to ensure the quality of paint dripping.

[0018] As a further improvement measure of the present invention, in the above-mentioned method for curing the insulating paint dripping of the stator core of a motor, when the flat wire stator assembly is located at the paint dripping position in step (C), the side close to the paint dripping port is tilted upward by 4-6°. In order to take into account the uniformity and fluidity of the insulating paint coating, it is necessary to limit the inclination angle of the flat wire stator assembly in step (C).

[0019] As a further improvement measure of the present invention, in the above-mentioned method for curing the insulating paint dripping on the stator core of a motor, the rotation speed of the flat wire stator assembly in step (C) is 10-22 rad / min. Considering the production efficiency and coating uniformity, the rotation speed of the flat wire stator assembly needs to be limited.

[0020] As a further improvement measure of the present invention, in the above-mentioned method for curing the insulating paint of the stator core of a motor, in step (C), the temperature of the flat wire stator assembly is maintained at 75°C-115°C, and the flat wire stator assembly is heated and compensated for the temperature after the paint dripping on one side is completed. Since the flat wire stator assembly is exposed to room temperature during the paint dripping process, the temperature of the flat wire stator assembly will drop, especially when there are more paint dripping positions, the temperature drop is more obvious. In order to prevent the temperature of the flat wire stator assembly from being too low in the later stage of paint dripping and affecting the fluidity and coating of the insulating paint, it is necessary to heat the product after the paint dripping on one side is completed, and then drip the paint on the other side after heating, so as to ensure the quality of the coating at both ends and further ensure the product quality.

[0021] As a further improvement measure of the present invention, in the above-mentioned method for curing the insulating paint dripping of the stator core of a motor, in step (D), the gel temperature of the flat wire stator assembly is 160°C-180°C, the amount of paint on the flat wire stator assembly is 110g-130g, and after the paint dripping of the flat wire stator assembly is completed, the conveying device sends the flat wire stator assembly into the gel area to heat the product to ensure that the surface of the insulating paint no longer flows.

[0022] As a further improvement measure of the present invention, in the above-mentioned method for curing the dripping paint of the motor stator core insulating paint, the temperature of the flat wire during the coating process of step (F) is 115° C.-135° C.

[0023] As a further improvement measure of the present invention, in the above-mentioned method for curing the insulating paint of the stator core of a motor, the coating times in step (G) is 2 times, and during the coating process, the flat wire stator assembly is immersed in the coating powder, each immersion time is 0.1-1S, and the time interval between the two immersion times is 0.5-2S.

[0024] As a further improvement measure of the present invention, in the above-mentioned method for curing the insulating paint dripping on the stator core of a motor, after coating, the distance from the end of the flat wire of the flat wire stator assembly to the coating position is 19mm-24mm.

[0025] As a further improvement measure of the present invention, in the above-mentioned method for curing the dripping paint of the motor stator core insulating paint, the curing temperature in step (H) is 160°C-180°C, the temperature is raised again for curing after gelling, and the paint is cooled and disassembled after curing.

[0026] Compared with the prior art, the beneficial effects of the present invention are: 1. The paint dripping method is improved, and the original post-paint dripping curing and post-coating curing are integrated. Under the condition of ensuring the quality of paint dripping and coating, the quality requirements are met through one-time curing, thereby improving production efficiency; 2. After the flat wire stator assembly is dripped with paint, insulating paint is attached to the flat wire and the stator core slot, and the filling effect in the core slot is good. The insulating paint completely fixes the flat wire and the insulating paper to prevent the flat wire from shaking in the stator core slot, thereby improving product quality; 3. The glue dripping method is adopted with multiple stations or multiple glue dripping ports to ensure the coating rate and coating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] like Figure 1 The present invention shown in the figure provides a method for curing the insulating paint dripping of the stator core of a motor, and the method for curing the insulating paint dripping includes the following steps:

[0030] First, the flat wire stator assembly is loaded onto the paint dripping equipment, and the flat wire stator assembly is weighed by a manipulator. After weighing, the flat wire stator assembly is installed on the paint dripping equipment. The paint dripping equipment usually includes a preheating furnace and a conveying device. The flat wire stator assembly enters the preheating furnace driven by the conveying device. The preheating furnace heats the flat wire stator assembly to 100°C. The overall preheating time of the flat wire stator assembly in the preheating furnace is 60 minutes. This step can ensure the fluidity of the insulating paint on the surface of the flat wire stator assembly during paint dripping, thereby ensuring the quality of paint dripping.

[0031] The paint dripping equipment also includes a paint dripping device, which has a paint dripping position. The flat wire stator assembly is transported to the paint dripping position after being heated. The paint dripping position is provided with a glue dripping port. When dripping paint, the flat wire stator assembly is placed horizontally, and paint is dripped on one side first. After the paint dripping on one side is completed, it is transferred to the next station to drip paint on the other side. The temperature of the flat wire stator assembly is maintained at 85°C, and after the paint dripping on one side is completed, the flat wire stator assembly is heated and compensated for the temperature to ensure that the temperature of the flat wire stator assembly is constant. The insulating paint flows out from the paint dripping port. The paint dripping port includes an outer diameter paint dripping port and an inner diameter paint dripping port. The outer diameter paint dripping port is located on the outside of the outer diameter, and the inner diameter paint dripping port is located on the inside of the inner diameter. When dripping paint, the flat wire stator assembly is tilted upward by 5° on the side close to the paint dripping port. The flat wire stator assembly rotates at a speed of 15rad / min. The insulating paint flows out from the paint dripping port and flows to the lower end of the flat wire stator assembly. Paint dripping on both sides can ensure uniform coating.

[0032] After the paint dripping is completed, in order to ensure the uniformity and stability of the thickness of the insulating paint, the insulating paint needs to be gelled, the flat wire stator assembly is transported to the gelling area, and the flat wire stator assembly is heated and gelled. The gelling temperature of the flat wire stator assembly is 170°C, and the amount of paint on the flat wire stator assembly is 120g. After the gelling is completed, the flat wire stator assembly is clamped to the coating and loading station, and the flat wire stator assembly is installed on the coating and loading station by a robot.

[0033] The flat wire stator assembly is automatically heated up at the coating loading station to reach the coating temperature. The preferred coating temperature is 125°C. After the heating is completed, the flat wire stator assembly is grabbed by a robot and immersed in the coating powder according to the set parameters to coat the flat wire stator assembly. Usually, the coating times are 2 times. During the coating process, the flat wire stator assembly is immersed in the coating powder. The powder dipping time for each time is 0.5S, and the time interval between two powder dipping times is 1S to ensure that the powder dipping is uniform and firm.

[0034] The flat wire stator assembly is transported to the curing area, and the insulating paint and coating powder are heated and cured at the same time. The curing temperature is 170°C. After the curing is completed, the flat wire stator assembly is transferred to the cooling area for cooling.

[0035] After the flat wire stator assembly is paint dripped, insulating paint is attached to the flat wire winding and the stator core slot, the core slot is filled with good effect, the insulating paint completely fixes the flat wire and the insulating paper to prevent the flat wire from shaking in the stator core slot, thereby improving product quality. The method improves the paint dripping method by integrating the original curing after paint dripping and curing after coating. Under the condition of ensuring the quality of paint dripping and coating, the quality requirements are met through one-time curing, thereby improving production efficiency. The method of preheating, paint dripping, gelling and curing is adopted to ensure the filling and coating effect of the insulating paint, improve product quality, and adopt a multi-station or multi-glue dripping method to drip glue to ensure the coating rate and coating effect.

[0036] The above describes the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A method for curing the insulating paint dripping of a motor stator core, characterized in that: The paint dripping curing method comprises the following steps: Step (A), paint dripping and loading: loading the flat wire stator assembly onto the paint dripping equipment; Step (B), paint preheating: the paint dripping equipment includes a preheating furnace and a conveying device. The flat wire stator assembly is driven by the conveying device into the preheating furnace, and the preheating furnace heats the flat wire stator assembly. Step (C), paint dripping: the paint dripping equipment also includes a paint dripping device, the paint dripping device has a paint dripping position, the flat wire stator assembly is transported to the paint dripping position after being heated, the paint dripping position is provided with a glue dripping port, when dripping the paint, the flat wire stator assembly is placed horizontally, and paint dripping is performed on one side first, and after the paint dripping on one side is completed, it is transferred to the next station to drip paint on the other side, and the insulating paint flows out from the paint dripping port, the paint dripping port includes an outer diameter paint dripping port and an inner diameter paint dripping port, the outer diameter paint dripping port is located on the outer side of the outer diameter, and the inner diameter paint dripping port is located on the inner side of the inner diameter, when dripping the paint, the side of the flat wire stator assembly close to the paint dripping port is tilted upward, and the flat wire stator assembly performs a rotational motion; Step (D), gelling: after the paint dripping is completed, the flat wire stator assembly is transported to the gelling area, and the flat wire stator assembly is heated and gelled. The gelling temperature of the flat wire stator assembly is 160°C-180°C, and the amount of paint on the flat wire stator assembly is 110g-130g; Step (E), coating and loading: clamping the flat wire stator assembly to the coating and loading station; Step (F), coating preheating: the flat wire stator assembly automatically moves to the high-frequency heating position for heating, so that the flat wire stator assembly reaches the coating temperature; Step (G), coating: immersing the flat wire stator assembly into the coating powder according to the set parameters, coating the flat wire stator assembly, the number of coating times of the flat wire stator assembly is 2 times, and during the coating process, the flat wire stator assembly is immersed in the coating powder, each immersion time is 0.1-1s, and the time interval between the two immersions is 0.5-2s; Step (H), curing: transporting the flat wire stator assembly to a curing area, and curing the insulating paint and the coating powder at the same time by heating; Step (I), unloading and cooling: after solidification is completed, the flat wire stator assembly is transferred to a cooling zone for cooling.

2. A method for curing the insulating paint dripping of a motor stator core according to claim 1, characterized in that: In step (B), the flat wire stator assembly enters the preheating furnace and is heated to 80°C-110°C, and the preheating time is 40-70 minutes.

3. A method for curing the insulating paint dripping of a motor stator core according to claim 2, characterized in that: In step (C), when the flat wire stator assembly is located at the paint dripping position, the side close to the paint dripping port is tilted upward by 4-6 degrees.

4. A method for curing the insulating paint dripping of a motor stator core according to claim 3, characterized in that: In step (C), the rotation speed of the flat wire stator assembly is 10-22 rad / min.

5. A method for curing the insulating paint dripping of a motor stator core according to claim 4, characterized in that: In step (C), the temperature of the flat wire stator assembly is maintained at 75°C-115°C, and the flat wire stator assembly is heated and supplemented with temperature after the paint dripping on one side is completed.

6. A method for curing the insulating paint dripping of a motor stator core according to claim 5, characterized in that: The temperature of the flat wire during the coating process in step (F) is 115°C-135°C.

7. A method for curing the insulating paint dripping of a motor stator core according to claim 6, characterized in that: After coating, the distance from the flat wire end of the flat wire stator assembly to the coating position is 19mm-24mm.

8. The method for curing the insulating paint dripping of the stator core of a motor according to claim 7, characterized in that: The curing temperature in step (H) is 160°C-180°C.

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