Multi-material powder supplying and laying device for powder bed melting and control method of multi-material powder supplying and laying device

Abstract

The invention discloses a multi-material powder supplying and laying device for powder bed melting and a control method of the multi-material powder supplying and laying device. A plurality of powderinlets are formed in the upper end of a main powder storage tank, an independent sub-powder storage tank is installed at each powder inlet, and powder in the sub-powder storage tanks are premixed by the main powder storage tank, then a powder mixer in a powder mixing device is used for mixing the premixed mixture, the main powder storage tank and the powder mixing device are adopted for premixingand sufficient mixing respectively, the powder mixing device serves as a buffer section, the powder mixing printing efficiency is improved, and meanwhile printing materials of different mixing contents and types can be added through the plurality of sub-powder storage tanks; and a printing moving frame is used for driving a powder spray head to spray powder, manufacturing of a functionally gradedmaterial and a multi-component alloy / high-entropy alloy-based composite material with components continuously changing in any direction is achieved, long powder mixing time is saved, real-time powderlaying and real-time machining can be achieved, the production cycle is greatly shortened, the production cost is greatly reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to a powder spreading device for powder bed additive manufacturing, in particular to a multi-material powder supplying and spreading device for powder bed fusion and a control method thereof. Background technique [0002] Powder bed fusion (PBF-Powder Bed Fusion) additive manufacturing technology uses laser or electron beam as a heat source to selectively melt the laid powder in the forming chamber, and discretely stacks to directly manufacture the 3D data model of the complex structure into a physical part The additive manufacturing technology is widely used in the manufacture of products in aerospace, weaponry and other fields. However, the current PBF technology is mainly used to form a material, and it is difficult to realize the direct and efficient forming of materials such as continuous gradient materials, medium-entropy alloys, and high-entropy alloys. [0003] In view of the above problems, the patent with the publicatio...

AI Technical Summary

Problems solved by technology

However, at present, PBF technology is mainly used to form a material, and it is difficult to realize direct and efficient forming of materials such as continuous gradient materials, medium-entropy alloys, and high-entropy alloys.

[0003] In view of the above problems, the patent of publication number CN106378450A proposes a laser selective melting additive manufacturing equipment and method suitable for various materials. Its two powder storage tanks transport two kinds of powders respectively, without mixing, it is difficult to realize continuous gradient materials, high The direct forming of entropy alloys, and when the powder is laid, the powder cannot be fed quantitatively, and the powder recovery is difficult; the patent of the publication number CN108480630A proposes a device and method for preparing gradient materials based on selective laser melting technology, and the powder mixed in the horizontal gradient ratio It is difficult to precisely control the distribution, and it is difficult to realize the change of the longitudinal powder gradient. When the powder type is different, the specific powder storage needs to be replaced, and it is impossible to directly shape the high-entropy alloy

Images