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Grosor de la pared

In 3D printing, wall thickness refers to the distance between one surface of your model and the opposite sheer surface. For Stainless Steel, the minimum wall thickness you can use is 1 mm. The applicable minimum wall thickness can vary as it generally depends on the part’s geometry and size. There is no maximum wall thickness as such but keep in mind that thicker areas may increase stresses in your part, which could cause deformations.

 

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Tamaño del detalle

Very fine details (as small as 0.5 mm) are possible when you print in Stainless Steel, using Metal 3D Printing (M3DP). Detail sizes refer to the distance between the surface of your model and the surface of your detail. Letters are also considered as details but their specifications vary depending on whether they are engraved or embossed. For engraved text or surface details, we recommend letters with a minimum line thickness of 0.4 mm, a minimum overall height of 0.4 mm, and a minimum depth of 0.15 mm. For embossed text or surface details, we recommend letters to have a line thickness of at least 0.4 mm, an overall height of at least 0.4 mm, and a depth of at least 0.15 mm.

Surface quality

Calidad de superficie y orientación

The buildup direction of a part has a large impact on the surface quality as it defines the orientation of the part’s surfaces with respect to the horizontal plane or build plate. Angles (β) measuring less than 45° with reference to the build plate tend to lead to poorer surface quality, while steep angles of more than 45° are likely to have better, smoother surfaces. An overhanging structure (e.g. the underside of a table) is likely to have poor surface quality.

Agujeros roscados

If your design requires threads or other post-machining, please get in touch with our project management team to discuss how we can achieve the right result.

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Thermally Induced Stresses

Your model in Aluminum is 3D-printed using M3DP which is basically a layer-wise welding process. The layer-wise powder melting and its solidification leads to thermally induced stresses upon the cooling down of the melted powder. A design that is not suitable for M3DP can lead to build failures and/or part deformations due to large thermally induced stresses. It is therefore essential to consider the process-specific restriction while designing the part. We advise you to round off or fillet the edges in your design with a minimum radius of 3 mm. Also, avoid sharp edges for the same reason. Try to avoid large material accumulations and, in general, favor organic shapes over edged designs.

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Precisión dimensional

M3DP is the metal 3D printing process with the highest dimensional accuracy by far. Dimensional accuracy doesn’t relate to the detail of your model but to its deviation from the nominal size. The general accuracy for 3D-printed Stainless Steel is ± 0.2% (with a lower limit on ± 0.2 mm).

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Soporte

Stainless Steel is 3D-printed using Metal 3D Printing. M3DP begins with a bed of Stainless Steel powder, which is then melted by a laser. Support structures are also 3D-printed in Stainless Steel. The support structures keep your model rigid during printing and absorb internal stress and deformations. Walls or overhangs with angles measuring below 45° typically need to be supported as they would otherwise collapse during the printing process. Afterward, the support is removed manually and your part is sandblasted. Some evidence of the removed support structures may still be visible.

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Eliminación de polvo

When making a hollow model, it is important to include a hole in your design so that the unused powder trapped inside the cavity can be removed. Try to use a minimum wall thickness of 1 mm and keep at least one opening with a minimum diameter of 3 mm. This opening will serve as an exit for the unused powder trapped inside the printed part. Larger and complex cavities need multiple holes with larger diameters, preferably 7 mm. Holes in the center of your model are usually the best as they allow most of the powder to be removed.

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Agujeros

The minimum recommended diameter for a hole is 2 mm. This is the minimum diameter needed to remove internal powder; if the hole is smaller the powder will get stuck inside the geometry. Complex and irregularly shaped holes or interior spaces are impossible for us to inspect or remove the powder completely.

The longer and more complex you make the internal channels, the larger the minimum diameter you have to maintain. A print result according to the CAD geometries therefore cannot always be guaranteed in such cases. We strongly recommend that you avoid designing long internal channels in M3DP unless you are in contact with a Materialise project manager who can review your files.

For bores with high demands on tolerances, we recommend providing offsets or closing the holes completely for printing. The part can later be post-machined to ensure bores according to the part-specific requirements.

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Requisitos de archivos para OnSite

Aceptamos los siguientes formatos de archivo: STL, 3DS, 3DM, OBJ, WRL, MATPART, STP, SKP, SLDPRT, STEP, CATPART, IGES, MODEL, MXP y MGX.

Además de los formatos de archivo, también tenemos restricciones relacionadas con el contenido de dichos archivos. Para ofrecer la mejor calidad posible y garantizar la trazabilidad, solo permitimos un modelo por archivo.

Especificaciones técnicas

Precisión estándar ± 0,2 % (con un límite inferior de ± 0,2 mm)
Grosor de la capa 0,03 – 0,1 mm
Grosor mínimo de la pared 1 mm
Mínimo detalle 0,5 mm
Dimensiones máximas de la pieza

250 x 250 x 280 mm (pedidos fuera de línea)
220 x 220 x 250 mm (pedidos en línea)

Interlocking or enclosed parts? No
Estructura de la superficie Las piezas sin acabar suelen contar con una superficie rugosa, aunque es posible conseguir superficies lisas mediante diferentes grados de acabado