Ultrasonic motor metal plastic compound stator and preparation method thereof
A composite stator, metal-plastic technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve stator teeth processing difficulties, high cost, and unfavorable mass production Production and other issues, to achieve the effect of improving friction and wear performance, reducing weight, reducing material costs and processing costs
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[0039] A method for preparing a metal-plastic composite stator of an ultrasonic motor includes the following steps,
[0040] Step 1, mixing of powder: take by weight as follows:
[0041] Polymer matrix: 30%-80%; wherein, the polymer matrix is a mixture of one or more of polyphenylene sulfide, polytetrafluoroethylene, polyphenylene ester, and polyimide; the particle size of the polymer matrix is 400-1000 mesh;
[0042] Reinforcement fiber: 5%-30%; wherein, the reinforcement fiber is a mixture of one or more of carbon fiber, glass fiber, potassium carbonate whisker, and aramid fiber;
[0043] Friction and heat conduction improver: 5%-30%; wherein, the friction and heat conduction improver is one or a mixture of nano-copper powder, nano-diamond powder, nickel powder, and rare earth powder;
[0044] Put the polymer matrix, reinforcing fiber and frictional heat conduction improver in a high-speed mixer and mix 5 times, each time for 1-2 minutes; obtain mixed powder;
[0045] S...
Embodiment 1
[0051] Embodiment 1: Weigh the following by weight percentage: polytetrafluoroethylene 48%, polyphenylene sulfide 32%, copper powder 10%, carbon fiber 10%.
[0052] Specific steps are as follows:
[0053] 1) Weigh each component in proportion, and mix 5 times in a high-speed mixer, each time for 1 minute;
[0054] 2) Coat the mold with a release agent, then add the mixed powder into the mold, press and form at a pressure of 100Mpa, keep the pressure for 12 minutes, pressurize and sinter at a temperature of 380°C, and cool with the furnace;
[0055] 3) Carry out simple modification and bonding with the stator metal matrix;
[0056] The metal-plastic composite stator prepared in this example has a friction coefficient of 0.19, a preload force of 120N is applied, the rotational speed of the ultrasonic motor is 70r / min, and the stall torque is 0.6Nm. Reduced wear increases motor life.
Embodiment 2
[0057] Embodiment 2: Weigh the following by weight percentage: polytetrafluoroethylene 55%, polyphenylene sulfide 30%, copper powder 10%, carbon fiber 5%.
[0058] Specific steps are as follows:
[0059] 1) Weigh each component in proportion, and mix 5 times in a high-speed mixer, each time for 1 minute;
[0060] 2) Coat the mold with a release agent, then add the mixed powder into the mold, press and form at a pressure of 100Mpa, keep the pressure for 15 minutes, pressurize and sinter at a temperature of 370°C, and cool with the furnace;
[0061] 3) Carry out simple modification and bonding with the stator metal matrix;
[0062] The metal-plastic composite stator prepared in this example has a friction coefficient of 0.17, a preload force of 100N is applied, the rotational speed of the ultrasonic motor is 60r / min, and the stall torque is 0.5Nm.
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