Forming part with a cantilever structure and its forming method

1 . A method for forming a forming part with a cantilever structure, used for forming the forming part with the cantilever structure, the cantilever structure is perpendicular to a laser melting deposition direction of the forming part and a lower portion is in a suspended state;

wherein the forming method comprises:

obtaining a model of the forming part, the model comprises a main body and at least one cantilever structure protruding from the main body;

adding at least one inclined supporting portion to the model, wherein a top of the inclined supporting portion is integrally connected to the cantilever structure, and a side of the inclined supporting portion is integrally connected to the main body, so that the lower portion of the cantilever structure in the suspended state is entirely supported by the at least one inclined supporting portion, the inclined supporting portion is provided with at least one inclined surface, the inclined surface is oriented downward and is provided with an angle of inclination, and the angle of inclination is an acute angle between the inclined surface and a forming base plate;

performing layer separating and slicing process on the model with said at least one inclined supporting portion along a direction perpendicular to a deposition direction, forming a plurality of forming layers;

performing scanning path planning on each forming layer, the scanning path after planning comprises an inner filling scanning path and a frame scanning path located on an outer periphery of the inner filling scanning path;

wherein in a plurality of forming layers forming the inclined surface, at least one layer to be formed has a suspended area protruding from a layer already formed and a non-suspended aera, the frame scanning path comprises a first path and a second path, the first path corresponds to the non-suspended area and the second path corresponds to the suspended area;

based on size of the angle of inclination, setting first process parameters for preparation for the first path, and setting second process parameters for preparation for the second path;

using laser melting deposition technique, printing layer by layer based on the set process parameters for preparation to form the forming part with the cantilever structure;

wherein an energy density in the first process parameters for preparation is smaller than an energy density in the second process parameters for preparation.

2 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein the forming method further comprising:

setting third process parameters for preparation for the inner filling scanning path;

wherein an energy density in the third process parameters for preparation is smaller than the energy density in the first process parameters for preparation.

3 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein the different energy density is obtained by adjusting laser power and/or scanning rate in the process parameters for preparation.

4 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein the forming method further comprises:

performing support removing processing on the forming part to obtain a forming part with the cantilever structure.

5 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein:

the first path and the second path are printed continuously during the forming process.

6 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein:

a 90° angle is provided between the inner filling scanning path in two adjacent forming layers.

7 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein the scanning path planning further comprising:

planning an extending path of the second path that extends along the first path;

planning a displacement between the second path and the inner filling scanning path;

wherein the second process parameters for preparation are set for the extending path.

8 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein the scanning path planning further comprising:

planning an offset displacement of the second path towards the inner filling scanning path.

9 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein before performing the layer separating and slicing process on the model, the forming method further comprising:

performing allowance addition processing on the model.

10 . The method for forming the forming part with the cantilever structure according to claim 1 , wherein the inclined supporting portion is with a shape of reversed pyramid.