Rapid press-in type stepping motor rotor assembly process

Abstract

The invention discloses a quick press-in type stepping motor rotor assembly process, which comprises the following steps of: pouring a magnetic ring into a corresponding clean and tidy vibration disc, pouring a gear assembly into the corresponding clean and tidy vibration disc, correspondingly debugging the amplitudes of the two vibration discs on four vibration regulators, and ensuring the normal movement of the magnetic ring and the gear assembly. An automatic machine and all tool jigs used for assembling are cleaned up, it is confirmed that the tool jigs are complete and in a good state, a material box with the magnetic performance of a magnetic ring assembly with the corresponding color is placed, after all the actions are confirmed to be correct, a starting button is pressed down, the automatic machine conducts automatic injection molding assembling, and the assembled stepping motor rotor is magnetized and machined. When the stepping motor rotor is assembled, the assembled magnetic ring assembly is moved to the track and then conveyed to the placed material box, it is ensured that the track is clean and tidy, the assembling process of the stepping motor rotor has good assembling efficiency, the product quality of the assembled motor rotor is well guaranteed, and the assembling yield is high.

Description

Technical Field

[0001] The present invention relates to the technical field of stepping motor rotor assembly, and specifically to a rapid press-in type stepping motor rotor assembly process. Background Art

[0002] Motors mainly include permanent magnet motors that use permanent magnets to establish magnetic fields and traditional electro-excited motors. Compared with the two, permanent magnet motors, especially rare earth permanent magnet motors, have significant advantages such as simple structure, reliable operation, small size, light weight, high power density, low loss, high efficiency, and flexible and diverse shapes and sizes of the motors. Therefore, they are widely used in almost all fields of aerospace, national defense, industrial and agricultural production, and daily life.

[0003] The rotor of an electric motor is an important component of the motor. At present, during the assembly process of the electric rotor, traditional component splicing and winding assembly are used, which will lead to low assembly efficiency. Moreover, the yield rate of the assembled products is low. Therefore, an improved technology is urgently needed to solve this problem existing in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a rapid press-in type stepping motor rotor assembly process to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A rapid press-in type stepping motor rotor assembly process, and the process of the assembly process is as follows:

[0006] Pour the magnetic ring into the corresponding clean and tidy vibrating bowl.

[0007] Pour the gear assembly into the corresponding clean and tidy vibrating bowl.

[0008] Adjust the amplitudes of the above two vibrating bowls on four vibration controllers correspondingly to ensure the normal movement of the magnetic ring and the gear assembly.

[0009] Clean the automatic machine and each tooling fixture used for assembly, and confirm that the tooling fixtures are complete and in good condition.

[0010] Place the material box corresponding to the magnetic performance of the magnetic ring assembly of the corresponding color.

[0011] After confirming that the above actions are correct, press the start button, and the automatic machine will automatically perform injection molding assembly and magnetize the assembled stepping motor rotor.

[0012] The assembled magnetic ring assembly will move to the track and then be conveyed into the placed material box to ensure that the track is clean and tidy.

[0013] Preferably, an optical detector, a material rejection device, and a return tray are provided at the discharge port of the vibrating bowl. The optical detector detects the placement posture of the motor assembly in the bowl and the appearance of the motor assembly.

[0014] The return tray is arranged below the material rejection device directly opposite. The optical detector detects the placement posture of the motor assembly. When the current motor assembly does not conform to the specified placement posture and the appearance of the motor assembly is incomplete, the material rejection device immediately ejects the motor assembly that does not conform to the placement posture by gas and drops it into the return tray.

[0015] Preferably, the vibrating bowl and the automatic machine are connected by an assembly component guide rail. The inner wall of the assembly component guide rail is finely polished. An auxiliary feeding air nozzle is installed in cooperation at the connection between the vibrating bowl and the assembly component guide rail. The auxiliary feeding air nozzle is installed at an angle of 30° with the edge of the assembly component guide rail. The auxiliary feeding air nozzle is embedded inside the assembly component guide rail.

[0016] A solenoid valve is provided in cooperation at the air duct connected to one end of the auxiliary feeding air nozzle.

[0017] Preferably, the magnetic ring needs to be demagnetized before being poured into the corresponding clean and tidy vibrating bowl.

[0018] Preferably, for the double insurance fixation of epoxy resin bonding + mechanical interference fit, the interference amount is controlled at 0.02 - 0.05 mm, and the curing temperature is processed by gradually increasing the temperature, with the temperature changing from 80°C / 2h → 120°C / 4h.

[0019] Preferably, when the stepping motor rotor is magnetized, the pulsed magnetic field intensity ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, the Halbach array is used to optimize the magnetic field distribution. After magnetization, the magnetic properties of the rotor are detected. The surface magnetic field intensity is detected using a gauss meter (typical value 0.3 - 0.8 T), and the pole phase error ≤ ±0.5°.

[0020] Preferably, the stepping motor rotor is subjected to mechanical detection, with the axial runout ≤ 0.02 mm, the radial runout ≤ 0.015 mm, and the axial preload: 5 - 10 N (adjusted according to the bearing type).

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) According to the size of the vibrating bowl, an appropriate amount of magnetic rings and gear components are added. In this way, the vibrating bowl can not only adjust the placement postures of the magnetic rings and gear components to the greatest extent, but also avoid wasting the utilization rate of the vibrating bowl.

[0023] (2) The vibrating bowl and the automatic machine are connected by an assembly component guide rail. The inner wall of the assembly component guide rail is finely polished, which can reduce the frictional resistance between the motor assembly component and the assembly component guide rail, enabling the motor component to move more smoothly.

[0024] (3) The auxiliary feeding air nozzle is installed at an angle of 30° with the edge of the assembly component guide rail. The auxiliary feeding air nozzle is embedded inside the assembly component guide rail. The auxiliary feeding air nozzle has an auxiliary driving effect on the motor assembly component inside the assembly component guide rail. Installing the auxiliary feeding air nozzle at an angle of 30° with the edge of the assembly component guide rail makes the output air flow have a better auxiliary driving effect on the motor assembly component.

[0025] (4) The magnetic ring needs to be demagnetized before being poured into the corresponding clean and tidy vibrating bowl to avoid the adsorption effect between the magnetic ring and the metal vibrating bowl.

[0026] (5) The assembly process of this stepper motor rotor not only has good assembly efficiency, but also the product quality of the assembled electronic rotor is well guaranteed, and the assembly yield is very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figure 1 , the present invention provides a technical solution: a rapid press-in type stepper motor rotor assembly process, and the assembly process is as follows:

[0030] Pour the magnetic ring into the corresponding clean and tidy vibrating bowl, pour the gear assembly into the corresponding clean and tidy vibrating bowl, adjust the amplitudes of the above two vibrating bowls on the four vibration regulators respectively to ensure the normal movement of the magnetic ring and the gear assembly, clean up the automatic machine and each tooling fixture used for assembly, confirm that the tooling fixtures are complete, in good condition, place the material box corresponding to the surface magnetic performance of the magnetic ring component of the corresponding color. After confirming that the above actions are correct, press the start button, and the automatic machine will automatically inject and assemble, magnetize the assembled stepper motor rotor, and the assembled magnetic ring component will move to the track and then be transferred to the placed material box to ensure that the track is clean and tidy.

[0031] Check each vibrating bowl used for processing, clean the inside of each vibrating bowl, pour the magnetic rings for assembly into the corresponding clean and tidy vibrating bowls. The magnetic rings need to be demagnetized before being poured into the corresponding clean and tidy vibrating bowls to avoid the adsorption effect between the magnetic rings and the metal vibrating bowls.

[0032] Pour the gear assemblies into the corresponding clean and tidy vibrating bowls. According to the size of the vibrating bowls, add an appropriate amount of magnetic rings and gear assemblies. In this way, the vibrating bowls can not only adjust the placement postures of the magnetic rings and gear assemblies to the greatest extent, but also will not waste the utilization rate of the vibrating bowls.

[0033] Adjust the amplitudes of the above two vibrating bowls correspondingly on the four vibration regulators to ensure the normal movement of the magnetic rings and gear assemblies. An optical detector, a material rejection device, and a return tray are provided at the discharge port of each vibrating bowl. The optical detector detects the placement posture of the motor assembly in the bowl and the appearance of the motor assembly in real time.

[0034] The return tray is arranged below the material rejection device directly opposite. The optical detector detects the placement posture of the motor assembly. When the optical detector detects that the current motor assembly does not conform to the specified placement posture and the appearance of the motor assembly is incomplete, the material rejection device immediately ejects the motor assembly that does not conform to the placement posture by gas and drops it into the return tray, removing the motor assemblies that do not meet the required placement and those with appearance problems, so that the motor assemblies that meet the requirements continue to move orderly in the feeding track.

[0035] The vibrating bowl and the automatic machine are connected by an assembly component guide rail. The inner wall of the assembly component guide rail is finely polished, which can reduce the frictional resistance between the motor assembly and the assembly component guide rail, enabling the motor assembly to move more smoothly. An auxiliary feeding air nozzle is installed in cooperation at the connection between the vibrating bowl and the assembly component guide rail. The auxiliary feeding air nozzle is installed at an angle of 30° with the edge of the assembly component guide rail. The auxiliary feeding air nozzle is embedded inside the assembly component guide rail. The auxiliary feeding air nozzle has an auxiliary driving effect on the motor assembly inside the assembly component guide rail. Installing the auxiliary feeding air nozzle at an angle of 30° with the edge of the assembly component guide rail can make the output air flow have a better auxiliary driving effect on the motor assembly.

[0036] A solenoid valve is provided in cooperation at the air duct connected to one end of the auxiliary feeding air nozzle. The solenoid valve can control the ventilation and air cut-off of the air nozzle, so that the auxiliary feeding air nozzle can eject air flow instantaneously. Sometimes, the instantaneous air flow can adjust the stuck materials, enabling the materials to readjust their postures after being impacted by the external air flow and then continue to be transported.

[0037] Use epoxy resin bonding + mechanical interference double insurance. The interference amount is controlled at 0.02 - 0.05 mm, and the curing temperature is processed by gradually increasing the temperature, with the temperature changing from 80°C / 2h → 120°C / 4h.

[0038] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution, so that the magnetization effect of the motor rotor is better and the magnetization efficiency is higher. After magnetization, the magnetic properties of the rotor are detected, and the surface magnetic field strength is detected using a gaussmeter (typical value 0.3 - 0.8 T), and the pole phase error ≤ ±0.5°.

[0039] The stepping motor rotor is mechanically detected, with an axial runout ≤ 0.02 mm, a radial runout ≤ 0.015 mm, and an axial preload: 5 - 10 N (adjusted according to the bearing type), ensuring that the assembled stepping motor rotor meets the production specifications.

[0040] Example 1,

[0041] Adopt epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled at 0.02 - 0.05 mm, and the curing temperature is 80°C for 2 hours.

[0042] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is mechanically detected, with an axial runout ≤ 0.02 mm, a radial runout ≤ 0.015 mm, and an axial preload: 5 - 10 N (adjusted according to the bearing type), ensuring that the assembled stepping motor rotor meets the production specifications.

[0043] Example 2,

[0044] Adopt epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled at 0.02 - 0.05 mm, and the curing temperature is 90°C for 2 hours.

[0045] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is mechanically detected, with an axial runout ≤ 0.02 mm, a radial runout ≤ 0.015 mm, and an axial preload: 5 - 10 N (adjusted according to the bearing type), ensuring that the assembled stepping motor rotor meets the production specifications.

[0046] Example 3,

[0047] Adopt epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled at 0.02 - 0.05 mm, and the curing temperature is 100°C for 2 hours.

[0048] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is subjected to mechanical inspection, with the axial runout ≤ 0.02 mm, the radial runout ≤ 0.015 mm, and the axial preload: 5 - 10 N (adjusted according to the bearing type), ensuring that the assembled stepping motor rotor meets the production indicators.

[0049] Example 4,

[0050] Use epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled at 0.02 - 0.05 mm, and the curing temperature is from 110 °C for 2 h.

[0051] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is subjected to mechanical inspection, with the axial runout ≤ 0.02 mm, the radial runout ≤ 0.015 mm, and the axial preload: 5 - 10 N (adjusted according to the bearing type), ensuring that the assembled stepping motor rotor meets the production indicators.

[0052] Example 5,

[0053] Use epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled at 0.02 - 0.05 mm, and the curing temperature is from 120 °C for 2 h.

[0054] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is subjected to mechanical inspection, with the axial runout ≤ 0.02 mm, the radial runout ≤ 0.015 mm, and the axial preload: 5 - 10 N (adjusted according to the bearing type), ensuring that the assembled stepping motor rotor meets the production indicators.

[0055] Example 6,

[0056] Use epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled at 0.02 - 0.05 mm, and the curing temperature is from 90 °C for 4 h.

[0057] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is subjected to mechanical inspection, with the axial runout ≤ 0.02 mm and the radial runout ≤ 0.015 mm. The axial preloading force is 5 - 10 N (adjusted according to the bearing type) to ensure that the assembled stepping motor rotor meets the production specifications.

[0058] Example 7,

[0059] Use epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled within 0.02 - 0.05 mm, and the curing temperature is 100 °C for 4 hours.

[0060] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is subjected to mechanical inspection, with the axial runout ≤ 0.02 mm and the radial runout ≤ 0.015 mm. The axial preloading force is 5 - 10 N (adjusted according to the bearing type) to ensure that the assembled stepping motor rotor meets the production specifications.

[0061] Example 7,

[0062] Use epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled within 0.02 - 0.05 mm, and the curing temperature is 110 °C for 4 hours.

[0063] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%, and the Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is subjected to mechanical inspection, with the axial runout ≤ 0.02 mm and the radial runout ≤ 0.015 mm. The axial preloading force is 5 - 10 N (adjusted according to the bearing type) to ensure that the assembled stepping motor rotor meets the production specifications.

[0064] Example 8,

[0065] Use epoxy resin bonding + mechanical interference double insurance fixation, with the interference amount controlled within 0.02 - 0.05 mm, and the curing temperature is 120 °C for 4 hours.

[0066] After the stepping motor rotor is assembled, it needs to be magnetized. When magnetizing the stepping motor rotor, the pulsed magnetic field strength ≥ 2000 kA / m, the magnetic flux tolerance is ±3%. The Halbach array is used to optimize the magnetic field distribution. The stepping motor rotor is subjected to mechanical inspection, with the axial runout ≤ 0.02 mm and the radial runout ≤ 0.015 mm. The axial preload: 5 - 10 N (adjusted according to the bearing type), ensuring that the assembled stepping motor rotor meets the production indicators.

[0067] After the above processing technology, through data comparison, the product quality effect is the best when the curing temperature adopts the gradually increasing temperature treatment process of 80℃ / 2h → 120℃ / 4h.

[0068] The assembly process of this stepping motor rotor not only has good assembly efficiency, but also the product quality of the assembled electronic rotor is well guaranteed, and the assembly yield is also very high.

[0069] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick press-in stepper motor rotor assembly process, characterized in that: The assembly process is as follows: Pour the magnetic ring into the corresponding clean and tidy vibration plate; Pour the gear assembly into a corresponding clean and tidy vibration plate; Adjust the amplitude of the above two vibration plates on the four vibration controllers to ensure the normal movement of the magnetic ring and gear assembly; Clean the automatic machine and the various jigs and fixtures used for assembly, and make sure that the jigs and fixtures are complete and in good condition; Arrange the material boxes with corresponding color magnetic ring components and magnetic properties; After confirming that the above actions are correct, press the start button, the automatic machine will automatically perform injection molding and assembly, and magnetize the assembled stepper motor rotor; The assembled magnetic ring components will be moved to the track and then transferred to the arranged material boxes to ensure that the track is clean and tidy.

2. The fast press-in stepper motor rotor assembly process according to claim 1, characterized in that: An optical detector, a material removal device, and a material return tray are provided at the discharge port of the vibration tray. The optical detector detects the placement posture of the motor assembly in the tray and the appearance of the motor assembly; The return tray is arranged below and directly opposite the ejection device. The optical detector detects the placement posture of the motor assembly. The optical detector detects that the current motor assembly does not conform to the prescribed placement posture and the appearance of the motor assembly is incomplete. The ejection device immediately uses gas to eject the motor assembly that does not conform to the placement posture and drops it to the return tray.

3. The fast press-in stepper motor rotor assembly process according to claim 1, characterized in that: The vibration plate and the automatic machine are connected by an assembly component guide rail, the inner wall of the assembly component guide rail is finely polished, and an auxiliary feeding air nozzle is installed at the joint between the vibration plate and the assembly component guide rail. The auxiliary feeding air nozzle is installed at an angle of 30° to the edge of the assembly component guide rail, and the auxiliary feeding air nozzle is embedded in the assembly component guide rail. An electromagnetic valve is provided at the air guide pipe connected to one end of the auxiliary feeding air nozzle.

4. The fast press-in stepper motor rotor assembly process according to claim 1, characterized in that: The magnetic ring needs to be demagnetized before being poured into the corresponding clean and tidy vibration plate.

5. The fast press-in stepper motor rotor assembly process according to claim 1, characterized in that: The double insurance of epoxy resin bonding + mechanical interference fixation is used to control the interference amount within 0.02-0.05mm, and the curing temperature is processed by gradually increasing the temperature from 80°C / 2h→120°C / 4h.

6. The fast press-in stepper motor rotor assembly process according to claim 1, characterized in that: When the stepper motor rotor is magnetized, the pulse magnetic field strength is ≥2000kA / m, the magnetic flux tolerance is ±3%, the Halbach array is used to optimize the magnetic field distribution, and the magnetic properties of the rotor are tested after magnetization. A Gaussmeter is used to test the surface magnetic field strength (typical value 0.3-0.8T), and the magnetic pole phase error is ≤±0.5°.

7. The fast press-in stepper motor rotor assembly process according to claim 1, characterized in that: The stepper motor rotor is mechanically tested, with axial runout ≤0.02mm, radial runout ≤0.015mm, and axial preload: 5-10N (adjusted according to the bearing type).

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