Metal 3D printing, like other 3D printing materials, requires 3D files to meet the basic requirements of physicality, water tightness, etc, it also have unique requirement as following:
1. the smallest detail features
The minimum detail feature is not less than 0.15mm, that is, the features and details less than 0.15mm may be ignored and cannot be displayed. For example, a 0.1 card slot, although the minimum spot can be less than 0.15mm, the features may be ignored;
2. the minimum wall thickness
The minimum wall thickness can reach 0.2mm, but it is recommended not to be less than 0.5mm. The minimum wall thickness is also related to the structure, the ratio of the height of the item and the wall thickness. Generally speaking, the ratio should not exceed 40, once exceed 40, it will lead to deformation.
3. Smooth level of the surface
The roughness and smoothness of the surface are related to three factors:
-C.The direction in which the parts are placed;
In different printing situations, the surface roughness, equipment, shape, placement, etc. all have an effect on the surface. Generally speaking, the vertical is better than the inclined surface, and the inclined upper surface is better than the lower surface.
Some post said that powder 3D printing technology does not require support, which may be true for SLS plastics for metal 3D printing, support is needed, and often necessary; the main role of metal 3D printing supporter:
1)Connected to the printing platform;
2)Keep the shape of the part;
3)to prevent curling;
5. Bridging structure
The distance allowed by the bridging structure is about 2 mm, which is still relatively small.
6. Internal stress – warping
Internal stress is a problem that must be faced in metal 3D printing. When the cross-section of printed articles changes greatly, it is easy to generate relatively large internal stress. In addition, a large area of flat surface will also generate strong internal stress. The internal stress is very large, which can deform the print base and even cut the bolt. This requires us to avoid the sudden change of the cross section from small to large, and to gradually transition; and avoid using a large area of flat surface, think about it, if you need a flat surface, you need to use 3D printing. What?
7. Other design skills
Consider the removal of the support and the removal of the powder after printing, leave the support and the powder removal inlet, and the support cannot be permanently sealed inside.
Finally, if you have any requirement about 3D printing, please drop message to HITIONS, we work with leading partners with advantages in amazing quality, cost, time.