Electron beam optical system and additive manufacturing device
An optical system and additive manufacturing technology, applied in the field of 3D printing, can solve problems such as adverse effects of cathodes and achieve the effect of improving stability
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Embodiment 1
[0027] This embodiment provides an electron beam optical system, such as figure 2 As shown, the electron beam optical system includes a focus system 1, a positive deflection system 2, a negative deflection system 3, and a deflection system 4 that are sequentially sealed and connected along the electron beam incident direction, and the above-mentioned focus system 1, positive deflection system 2, negative deflection system Both the system 3 and the deflection yoke 4 include a casing 7, and a coil 8 is arranged inside the casing 7. Specifically, the above-mentioned focusing system 1 may include an astigmatism coil and a focusing coil for converging electron beams. The coil 8 of the positive deflection yoke 2 is supplied with a constant current, so that the electron beam is deflected by a fixed angle. A constant current is also fed into the coil 8 of the negative deflection yoke 3, so that the electron beam is deflected by a fixed angle. The above-mentioned deflection system 4 ...
Embodiment 2
[0036] This embodiment provides an additive manufacturing device, which includes the electron beam optical system described in Embodiment 1, specifically, as Figure 4 As shown, the additive manufacturing device includes a forming chamber 10, a forming cylinder 20, a powder spreading platform 30, a hopper 40, a scraper 50 and an electron beam generating device 60, wherein:
[0037] The above-mentioned forming chamber 10 is a vacuum environment. Specifically, a vacuum system composed of a rotary vane pump, a molecular pump, and a vacuum gauge can be used to pump out the air in the forming chamber 10 to obtain a vacuum environment.
[0038]A forming cylinder 20 is arranged in the forming chamber 10 , the upper end surface of the forming cylinder 20 is airtight and installed on the powder spreading platform 30 , and a piston 70 which moves up and down is arranged therein.
[0039] The hopper 40 is arranged symmetrically on one or both sides of the forming cylinder 20 , and a powd...
Embodiment 3
[0045] This embodiment provides another additive manufacturing device, which includes the electron beam optical system described in Embodiment 1, specifically, as Figure 5 As shown, the additive manufacturing device includes a forming chamber 10, a forming cylinder 20, a powder spreading platform 30, a hopper 40, a scraper 50 and an electron beam generating device 60, wherein the above forming chamber 10, forming cylinder 20, powder spreading platform 30 and electron beam The structure of the beam generating device 60 is the same as that of the second embodiment, the difference is that:
[0046] The two hoppers 40 of this embodiment are arranged on the same side of the electron beam generating device 60 and on the same side of the forming cylinder 20. Different powder materials are respectively placed in the two hoppers 40, and are arranged below the two hoppers 40. There is a powder mixing box 90 through which different powder materials in the two hoppers 40 can be mixed in ...
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Abstract
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