NdFeB magnetic steel cutting method and special extrusion tool
A technology of NdFeB magnets, applied in lamination devices, chemical instruments and methods, magnets, etc., can solve the problems that the insulation cannot be guaranteed, and the thickness of the permanent magnet NdFeB magnets is difficult to control. , to achieve the effect of highlighting substantive features, improving efficiency and improving insulation
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Embodiment 1
[0030] Example 1, see figure 2 According to the design requirements, the frame 9 is processed, the boss 8 is fixedly installed at the bottom of the frame 9, and the limit device 7 is symmetrically installed on the inner side of the frame 9, the limit device 7 is located above the boss 8, and the pull Lifting device 4, the upper end of pulling up device 4 passes through frame 9, and the lower end of pulling up device 4 is fixedly installed circular indenter 6, and the outer cover spring 5 of pulling up device 4, holding pressure spring 5 is positioned at frame 9 and circular Between the pressure heads 6; during use, after the pull-up device 4 is pulled up, the magnetic steel coated with the adhesive 3 is put into the boss 8 piece by piece, wherein the magnetic steel is just in the position-limiting device 7 to ensure The magnet does not move during the extrusion process, and the excess glue will not touch the limit device 7. After the NdFeB magnet 1 is put in, release the pull...
Embodiment 2
[0031] Embodiment 2, select the sintered permanent magnet NdFeB magnet square piece, the NdFeB surface is pickled with nitric acid with a mass fraction of 5%, and then phosphating,
[0032] After the permanent NdFeB magnet 1 is wiped and degreased with alcohol, it is activated with a plasma flame for 1 minute, and then one of the bonding surfaces is coated with adhesive 2 at 4 points, such as figure 1 , and then put it into an oven for curing, the temperature is 20°C, and the time is 24 hours. After curing, the spot coating height is 0.03mm, which is controllable according to requirements;
[0033] Wipe and degrease the permanent NdFeB magnet 1 again with alcohol, activate it with a plasma flame for 1 minute, and then coat the adhesive 3 on the surface, and apply the 6 NdFeB magnets after the adhesive 3 on the surface. Steel 1 is stacked together, puts into the extruding frock of embodiment 1, as figure 2 , extruded with a force of 0.1mpa, and then placed in an oven for curi...
Embodiment 3
[0034] Embodiment 3, select the permanent magnet NdFeB magnet 1 after heavy rare earth dy or Tb diffusion, the NdFeB surface is pickled with nitric acid with a mass fraction of 3%, and then phosphating;
[0035] After the permanent magnet NdFeB magnet 1 is wiped and degreased with acetone, it is activated with low-temperature plasma for 10 minutes, and then one of the bonding surfaces is coated with adhesive 2 at 6 points, and then put into an oven for curing at a temperature of 200 ℃, time 0.1h, after curing, dot coating height 0.5mm;
[0036] Wipe and degrease the permanent NdFeB magnets 1 again with acetone, activate with low-temperature plasma for 10 minutes, and then coat the adhesive 3 on the surface, and apply the adhesive 3 on the surface of 50 pieces of NdFeB magnets. Steel 1 is stacked together, puts into the extruding frock of embodiment 1, as figure 2 , use a force of 20mpa to extrude, and then put it into an oven for curing together with the extrusion tooling. T...
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