Enameled wire flat wire cleanliness testing method

Abstract

The invention relates to an enamelled wire flat wire cleanliness testing method, which belongs to the technical field of enamelled wire cleaning, and comprises the following steps: 1) firstly, winding a 250g enamelled wire flat wire into a circular ring shape so as to be conveniently put into a beaker for cleaning subsequently; (2) according to the size of the wound enameled wire flat wire, the enameled wire flat wire is put into a glass beaker with the capacity of 800 ml, and a proper amount of F113 cleaning agent is added; according to the method for testing the cleanliness of the enameled wire flat wire, impurities on the outer wall of the enameled wire flat wire wound into a ring shape are preliminarily cleaned through a cleaning agent or an n-hexane cleaning agent, the enameled wire flat wire is cleaned again through an ultrasonic cleaning machine, and the cleaning agent on the outer wall of the enameled wire flat wire is treated under the action of tweezers and a cleaning bottle; the subsequent use quality of the enameled wire flat wire is improved, the nylon filter membrane is processed under the action of the oven and the analytical balance, the nylon filter membrane improves the overall performance of the enameled wire by forming a composite coating, and the service life of a motor is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of enameled wire cleaning, in particular to a method for testing the cleanliness of an enameled flat wire. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as their power source (or use conventional vehicle fuels and adopt new vehicle-mounted power devices), and integrate advanced technologies in vehicle power control and drive to form vehicles with advanced technical principles, new technologies, and new structures. The motor of a new energy vehicle is planned to use oil cooling (the motor stator and rotor are immersed in oil as a whole). Since the motor oil chamber is connected to the DCT transmission oil chamber, the parts in the motor oil chamber (shell, stator, rotor, clutch) are required to have a high degree of cleanliness, and the relevant parts need to be cleaned before assembly.

[0003] Impurities are prone to remain on the surface of motor parts, which seriously affects the subsequent assembly of the motor, affects the internal environment of the equipment, and reduces the use effect. Cleanliness will affect the service life of the motor. It is a necessary and important item in motor testing. The cleanliness of the motor directly affects the quality and safety of the whole vehicle. For this reason, we propose a cleaning method for enameled wire used in new energy vehicle motors. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a method for testing the cleanliness of an enameled flat wire, which has the advantages of improving the quality of the enameled flat wire during subsequent use, and solves the problem that impurities are easily left on the surface of motor parts, seriously affecting the subsequent assembly of the motor, affecting the internal environment of the equipment, reducing the use effect, and the problem that the cleanliness will affect the service life of the motor.

[0006] (II) Technical solution

[0007] The present invention provides the following technical solution: a method for testing the cleanliness of an enameled flat wire, comprising the following steps:

[0008] 1) First, wind 250g of enameled flat wire into a ring shape to facilitate subsequent placement into a beaker for cleaning;

[0009] 2) According to the size of the enameled flat wire after winding, put the enameled flat wire into a glass beaker with a capacity of 800ml, and add an appropriate amount of F113 cleaning agent. The cleaning agent liquid level should be immersed in the enameled flat wire to ensure that the enameled flat wire is thoroughly cleaned;

[0010] 3) Place the beaker containing the enameled flat wire and the cleaning solution into an ultrasonic cleaning machine, and perform ultrasonic cleaning on the enameled flat wire at a frequency of 40KHZ;

[0011] 4) After the ultrasonic cleaning is completed, use clean tweezers to take the enameled flat wire out of the beaker, rinse the outside of the enameled flat wire with a washing bottle, and then place the beaker on a heating table to heat and evaporate the cleaning solution;

[0012] 5) Place a nylon filter membrane with a diameter of 40 mm and a pore size of 10 μm into a clean beaker and put it into an oven together with the beaker for drying before use;

[0013] 6) Weigh the dried filter membrane with an analytical balance to an accuracy of 0.1 mg and record the weight of the filter membrane. After taking the filter membrane out of the oven, place it in an open, dry environment to cool naturally for 30 minutes before weighing and recording;

[0014] 7) When about 40 ml of the cleaning liquid is left after evaporation, transfer the remaining cleaning liquid to the weighed 100 ml small beaker, and use a wash bottle to clean the inner wall of the large beaker. After cleaning, pour the cleaning liquid into the small beaker to continue evaporation;

[0015] 8) When the cleaning liquid in the small beaker evaporates to about 20 ml, use a funnel to filter the remaining liquid through a membrane filter;

[0016] 9) The filtered membrane is placed in an oven for drying and weighed for the second time and recorded as M2.

[0017] Furthermore, the calculation formula for the surface cleanliness of the enameled flat wire is M 杂 =M2-M1.

[0018] Furthermore, disposable protective gloves should be worn when sampling and winding the enameled flat wire, and the surface of the sample should be prevented from being contaminated by anything that may affect the test results during the operation.

[0019] Further, the capacity of the glass beaker is 800 ml or 1000 ml, and the dosage of the cleaning agent or n-hexane cleaning agent in the glass beaker is 350 ml.

[0020] Furthermore, the ultrasonic cleaning machine cleans the enameled flat wire for 10 minutes.

[0021] Furthermore, the temperature of the heating stage was 150°C.

[0022] Furthermore, the temperature and time of baking the filter paper in the oven are 80° C. and 30 min, respectively.

[0023] (III) Beneficial effects

[0024] The cleanliness test method of the enameled flat wire uses a cleaning agent or a n-hexane cleaning agent to preliminarily clean the impurities on the outer wall of the enameled flat wire wound into a ring, and uses an ultrasonic cleaning machine to clean the enameled flat wire again, and uses tweezers and a washing bottle to treat the cleaning agent on the outer wall of the enameled flat wire, thereby improving the quality of the enameled flat wire for subsequent use, and uses an oven and an analytical balance to treat the nylon filter membrane, which improves the overall performance of the enameled wire by forming a composite coating, thereby improving the service life of the motor. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] A method for testing the cleanliness of an enameled flat wire in this embodiment includes the following steps:

[0027] 1) First, wind 250g of enameled flat wire into a ring shape to facilitate subsequent placement into a beaker for cleaning. Wear disposable protective gloves when sampling and winding the enameled flat wire. During the operation, prevent the sample surface from being contaminated by any contamination that may affect the test results.

[0028] 2) According to the size of the enameled flat wire after winding, put the enameled flat wire into a glass beaker with a capacity of 800ml, and add an appropriate amount of F113 cleaning agent. The cleaning agent liquid level should be above the enameled flat wire to ensure that the enameled flat wire is thoroughly cleaned. The capacity of the glass beaker is 800ml or 1000ml, and the dosage of the cleaning agent or n-hexane cleaning agent in the glass beaker is 350ml.

[0029] 3) Place the beaker containing the enameled flat wire and the cleaning solution into an ultrasonic cleaning machine, and perform ultrasonic cleaning on the enameled flat wire at a frequency of 40KHZ. The ultrasonic cleaning machine cleans the enameled flat wire for 10 minutes.

[0030] 4) After the ultrasonic cleaning is completed, use clean tweezers to take the enameled flat wire out of the beaker, and use a washing bottle to rinse the outside of the enameled flat wire. Then put the beaker on the heating table to heat and evaporate the cleaning liquid. The temperature of the heating table is 150°C.

[0031] 5) Place a nylon filter with a diameter of 40 mm and a pore size of 10 μm into a clean beaker and put it into an oven together with the beaker for drying. The temperature and time for baking the filter paper in the oven are 80°C and 30 minutes respectively.

[0032] 6) Use an analytical balance to weigh the dried filter membrane to an accuracy of 0.1 mg and record the weight of the filter membrane. After taking the filter membrane out of the oven, place it in an open, dry environment to cool naturally for 30 minutes before weighing and recording.

[0033] 7) When about 40 ml of the cleaning liquid is left after evaporation, transfer the remaining cleaning liquid to the 100 ml small beaker weighed above, and use a wash bottle to clean the inner wall of the large beaker. After cleaning, pour the cleaning liquid into the small beaker to continue evaporation.

[0034] 8) When the cleaning liquid in the small beaker evaporates to about 20 ml, use a funnel to filter the remaining liquid through a membrane filter;

[0035] 9) Place the filtered membrane in an oven for drying and weigh it for the second time, record it as M2. The calculation formula for the surface cleanliness of the enameled flat wire is M 杂 =M2-M1.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A method for testing the cleanliness of enameled flat wire, characterized in that: The following steps are involved: 1) First, wind 250g of enameled flat wire into a ring shape to facilitate subsequent placement into a beaker for cleaning; 2) According to the size of the enameled flat wire after winding, put the enameled flat wire into a glass beaker with a capacity of 800ml, and add an appropriate amount of F113 cleaning agent. The cleaning agent liquid level should be immersed in the enameled flat wire to ensure that the enameled flat wire is thoroughly cleaned; 3) Place the beaker containing the enameled flat wire and the cleaning solution into an ultrasonic cleaning machine, and perform ultrasonic cleaning on the enameled flat wire at a frequency of 40KHZ; 4) After the ultrasonic cleaning is completed, use clean tweezers to take the enameled flat wire out of the beaker, rinse the outside of the enameled flat wire with a washing bottle, and then place the beaker on a heating table to heat and evaporate the cleaning solution; 5) Place a nylon filter membrane with a diameter of 40 mm and a pore size of 10 μm into a clean beaker and put it into an oven together with the beaker for drying before use; 6) Weigh the dried filter membrane with an analytical balance to an accuracy of 0.1 mg and record the weight of the filter membrane. After taking the filter membrane out of the oven, place it in an open, dry environment to cool naturally for 30 minutes before weighing and recording; 7) When about 40 ml of the cleaning liquid is left after evaporation, transfer the remaining cleaning liquid to the weighed 100 ml small beaker, and use a wash bottle to clean the inner wall of the large beaker. After cleaning, pour the cleaning liquid into the small beaker to continue evaporation; 8) When the cleaning liquid in the small beaker evaporates to about 20 ml, use a funnel to filter the remaining liquid through a membrane filter; 9) The filtered membrane is placed in an oven for drying and weighed for the second time and recorded as M2.

2. A method for testing cleanliness of enameled flat wire according to claim 1, characterized in that: The calculation formula for the surface cleanliness of enameled flat wire is M 杂 =M2-M1.

3. A method for testing cleanliness of enameled flat wire according to claim 1, characterized in that: Wear disposable protective gloves when sampling and winding enameled flat wires, and prevent the sample surface from any contamination that may affect the test results during the operation.

4. A method for testing cleanliness of enameled flat wire according to claim 1, characterized in that: The capacity of the glass beaker is 800 ml or 1000 ml, and the dosage of the cleaning agent or n-hexane cleaning agent in the glass beaker is 350 ml.

5. A method for testing cleanliness of enameled flat wire according to claim 1, characterized in that: The ultrasonic cleaning machine can clean the enameled flat wire for 10 minutes.

6. A method for testing cleanliness of enameled flat wire according to claim 1, characterized in that: The temperature of the heating stage was 150°C.

7. A method for testing cleanliness of enameled flat wire according to claim 1, characterized in that: The temperature and time of baking the filter paper in the oven are 80°C and 30min respectively.