Aluminum wire motor welding process capable of preventing patent leather from being oxidized

Abstract

The invention discloses an aluminum wire motor welding process capable of preventing enameled leather from being oxidized. The aluminum wire motor welding process comprises the following steps that firstly, an enameled leather aluminum wire is automatically wound around a contact pin of a motor stator through a winding device; 2, the motor stator is placed on a fixing base, a heat insulation plate is arranged on the fixing base, a through hole for the contact pin to penetrate through is formed in the heat insulation plate, and an automatic lifting soldering-aid furnace below the heat insulation plate is used for soaking the contact pin with soldering flux; the fixed seat moves to the position above the automatic lifting tin furnace, and the automatic lifting dip soldering furnace performs tin dipping on the contact pin; the contact pin is subjected to one-time dip soldering; and the contact pin is at least subjected to one-time dip soldering. Step 3, welding the contact pin after dip soldering; step 4, carrying out power-on test on the welded motor stator; and 5, spraying three-proofing paint on the surface of the pin of the motor stator which is qualified in the power-on test. The tin furnace is isolated from the enamelled aluminum wire of the motor stator through the heat insulation plate, and the problems that the enamelled aluminum wire is exposed and oxidized easily, the service life of the motor is shortened and the like due to the fact that tin liquid breaks or the enamelled aluminum wire is damaged by a high-temperature environment are solved.

Description

Technical Field

[0001] The invention relates to the technical field of motor welding, and in particular to an aluminum wire motor welding process for preventing paint oxidation. Background Art

[0002] Aluminum wire motor refers to a motor whose internal coil uses aluminum wire or enameled aluminum wire as the winding material. Since the production cost of aluminum wire motor is lower than that of copper wire motor, more and more home appliances use aluminum wire motors to replace copper wire motors. The stator of an aluminum wire motor usually includes a pin and a wire rack. The aluminum enameled wire is first wound on the pin and then repeatedly wound on the wire rack. The pin needs to be dipped in solder before being welded to the wire.

[0003] For example, a Chinese patent with the announcement number CN115514178A discloses a stator paint stripping, kinking, and tinning test all-in-one machine, including a frame, a turntable rotatably mounted on the frame, a plurality of stator fixing seats for fixing the stator are circumferentially arranged on the turntable, and a paint stripping component, a kinking component, a wire cutting component, a tinning component, and a conduction test component are sequentially arranged on the frame around the circumference of the turntable. The tinning component includes a flux dipping part and a solder dipping part arranged on one side of the flux dipping part. When the above-mentioned stator paint stripping, kinking, and tinning test all-in-one machine tins the stator of an aluminum wire motor, the pins are first dipped in a relatively low temperature flux and then in a relatively high temperature liquid tin. When the relatively low temperature pins encounter a relatively high temperature liquid tin, the liquid tin will splash, thereby damaging the paint coating of the aluminum wire, causing the aluminum wire to be exposed and easily oxidized, shortening the life of the motor, and other problems.

[0004] In view of this, the present invention proposes an aluminum wire motor welding process for preventing paint oxidation to solve the above problem. Summary of the invention

[0005] The present invention overcomes the shortcomings of the above-mentioned technology and provides an aluminum wire motor welding process which can prevent paint oxidation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A welding process for aluminum wire motors to prevent paint oxidation comprises the following steps:

[0008] Step 1: Automatically wind the lacquered aluminum wire around the pins of the motor stator through the winding device;

[0009] Step 2: placing the motor stator on a fixed seat, the fixed seat is provided with a heat insulation board, the heat insulation board is provided with a through hole for the pin to pass through, the automatic lifting fluxing furnace below the heat insulation board dips the pin in flux; the fixed seat is moved above the automatic lifting tinning furnace, the automatic lifting soldering furnace dips the pin in tin; so that the pin completes one dip soldering; the pin is dip soldered at least once;

[0010] Step 3: Solder the dip-soldered pins;

[0011] Step 4: Conduct a power-on test on the welded motor stator;

[0012] Step 5: Spray conformal coating on the pin surface of the motor stator that has passed the power-on test.

[0013] Preferably, the soldering flux is rosin.

[0014] Preferably, the aluminum wire motor welding process includes two dip soldering steps.

[0015] Preferably, in step 2, the fixing seat and the motor stator are moved between the automatic lifting fluxing furnace and the automatic lifting tin furnace by a rotating disk; the fixing seat is arranged at the edge of the rotating disk, and the automatic lifting tin furnace and the automatic lifting fluxing furnace are arranged around the outer periphery of the rotating disk.

[0016] Preferably, the tin immersion time in step 2 is 1 to 5 seconds.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. During the dip soldering process, the pin is first immersed in a soldering flux with a lower temperature, and then immersed in a tin furnace with a higher temperature. Since the temperature difference between the pin and the tin furnace is too large, liquid tin will splash. The present invention isolates the tin furnace from the painted aluminum wire of the motor stator through a heat insulation board to prevent liquid tin from breaking or high temperature environment from damaging the paint of the aluminum wire. The painted aluminum wire is not easy to oxidize, which delays the service life of the motor.

[0019] 2. The motor stator is placed on the fixed seat, and the pins pass through the through holes so that the bottom of the pins can contact the flux and tin liquid, and the motor stator is accurately positioned on the fixed seat.

[0020] 3. After the pins of the motor stator are welded and powered on for testing, the surface of the pins is sprayed with conformal coating to form a protective layer on the surface of the pins, further preventing the pins and welding points from being oxidized. At the same time, the conformal coating can strengthen the curing of the paint on the aluminum wire, improve the anti-oxidation performance of the paint aluminum wire, and thus increase the service life of the motor stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of the rotating disk and the fixed seat of the present invention;

[0022] Figure 2 is a cross-sectional view through the fixing seat of the present invention;

[0023] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0025] The present invention proposes an embodiment of an aluminum wire motor welding process for reducing and preventing paint oxidation:

[0026] A welding process for aluminum wire motors to prevent paint oxidation comprises the following steps:

[0027] Step 1: Automatically wind the lacquered aluminum wire on the pins of the motor stator through a winding device. Specifically, the motor stator includes a wire rack, and the lacquered aluminum wire is first wound on the pins, and then repeatedly wound on the wire rack.

[0028] Step 2: Place the motor stator on a fixing base 1, on which a heat insulation board 2 is provided, on which a through hole 21 is provided for the insertion pin to pass through, and an automatic lifting fluxing furnace under the heat insulation board 2 dips the insertion pin in flux so that the insertion pin completes one dip soldering, and the insertion pin is dip soldered at least once.

[0029] Specifically, the flux is rosin, and the liquid rosin in the automatic lifting soldering furnace is 110-140°C. Moreover, the time for the pin to be immersed in the flux is very short, and the pin coming out of the automatic lifting soldering furnace is cooled to form a soldering layer. Then the fixing seat 1 is moved above the automatic lifting tin furnace, and the automatic lifting soldering furnace tins the pin; the tin liquid in the automatic lifting tin furnace is 232-275°C. Since the temperature difference between the pin and the tin liquid in the automatic lifting tin furnace is too large, when the pin is immersed in the automatic lifting tin furnace, the tin liquid will splash, but the heat insulation board 2 isolates the tin furnace from the painted aluminum wire of the motor stator to prevent the tin liquid from breaking or the high temperature environment from damaging the paint of the aluminum wire, causing the aluminum wire to be exposed and easily oxidized, thereby extending the service life of the motor.

[0030] Step 3: Solder the soldered pins to the connecting wires.

[0031] Step 4: Conduct a power-on test on the motor stators with welded wires, and select unqualified motor stators for repair or scrapping.

[0032] Step 5: The surface of the pins of the motor stator that has passed the power-on test is sprayed with three-conformal paint to form a protective layer on the surface of the pins, further preventing the pins and welding points from oxidizing. At the same time, the three-conformal paint can strengthen the curing of the paint on the aluminum wire, improve the anti-oxidation performance of the paint aluminum wire, and thus increase the service life of the motor stator.

[0033] The aluminum wire motor welding process of the present invention includes two dip soldering processes, which ensures that all solder joints of the plug pins have solder and flux, and the plug pins can be firmly welded to the connecting wires.

[0034] Specifically, in step 2, the fixing seat 1 and the motor stator are moved between the automatic lifting fluxing furnace and the automatic lifting tin furnace by the rotating disk 3, so as to facilitate the pin to be dip-soldered twice. The fixing seat 1 is arranged at the edge of the rotating disk 3, and the automatic lifting tin furnace and the automatic lifting fluxing furnace are arranged around the outer periphery of the rotating disk 3.

[0035] In step 2, the tinning time is 1 to 5 seconds to ensure that the pins are covered with a tin layer of a certain thickness.

[0036] Specifically, in step 1, the motor stator with winding is completed, the upper part of the pin is coated with sealant, so that the pin is connected to the lacquered aluminum wire, and the lower part of the pin is dip-soldered. In step 2, the sealant part of the pin is placed in the through hole 21.

[0037] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A welding process for aluminum wire motors to prevent paint oxidation, characterized in that: The following steps are involved: Step 1: Automatically wind the lacquered aluminum wire around the pins of the motor stator through the winding device; Step 2: placing the motor stator on a fixing seat (1), the fixing seat (1) being provided with a heat insulation board (2), the heat insulation board (2) being provided with a through hole (21) for the insertion pin to pass through, the automatic lifting soldering furnace below the heat insulation board (2) dipping the insertion pin in flux; the fixing seat (1) is moved above the automatic lifting tinning furnace, the automatic lifting soldering furnace dipping the insertion pin in tin; so that the insertion pin completes one soldering dip; the insertion pin is subjected to at least one soldering dip; Step 3: Solder the dip-soldered pins; Step 4: Conduct a power-on test on the welded motor stator; Step 5: Spray conformal coating on the pin surface of the motor stator that has passed the power-on test.

2. The aluminum wire motor welding process for preventing paint oxidation according to claim 1 is characterized in that: The soldering flux is rosin.

3. The aluminum wire motor welding process for preventing paint oxidation according to claim 1 is characterized in that: Includes two solder dips.

4. The aluminum wire motor welding process for preventing paint oxidation according to claim 3 is characterized in that: In step 2, the fixed seat (1) and the motor stator are moved between the automatic lifting fluxing furnace and the automatic lifting tin furnace by means of a rotating disk (3); the fixed seat (1) is arranged on the edge of the rotating disk (3), and the automatic lifting tin furnace and the automatic lifting fluxing furnace are arranged around the outer periphery of the rotating disk (3).

5. The aluminum wire motor welding process for preventing paint oxidation according to claim 3 is characterized in that: The tin immersion time in step 2 is 1 to 5 seconds.

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