A novel method of creation capillary structures in metal parts based on using selective laser melting methid of 3D printing technology and surface roughness

A dental implant surgical guide fabricated by 3-dimensional (3D) printing technology is widely used in clinical practice due to its convenience and fast fabrication. However, the 3D printing technology produces an incorrect guide hole due to the shrinkage of the resin materials, and in order to solve this, the guide hole is adjusted using a trimmer or a metal sleeve is attached to the guide hole. These methods can lead to another inaccuracy. The present method reports a technique to compensate for a decreased guide hole caused by shrinkage that can occur when a computer-guided implant surgical guide is fabricated with a 3D printer. The present report describes a technique to adjust the size of the guide hole using a free software program to identify the optimized guide hole size that is fabricated with the 3D printer.

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A novel method for fabricating curved frequency selective surface via 3D printing technology

10.1117/12.2071554 ◽

2014 ◽

Author(s):

Fengchao Liang ◽

Jinsong Gao

Keyword(s):

3D Printing ◽

Frequency Selective Surface ◽

Printing Technology ◽

3D Printing Technology ◽

Novel Method ◽

Frequency Selective

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Review of 3D Printed Millimeter-Wave and Terahertz Passive Devices

International Journal of Antennas and Propagation ◽

10.1155/2017/1297931 ◽

2017 ◽

Vol 2017 ◽

pp. 1-10 ◽

Cited By ~ 6

Author(s):

Bing Zhang ◽

Wei Chen ◽

Yanjie Wu ◽

Kang Ding ◽

Rongqiang Li

Keyword(s):

Surface Roughness ◽

3D Printing ◽

Millimeter Wave ◽

Design Methodology ◽

Device Fabrication ◽

Printing Technology ◽

Dimensional Tolerance ◽

3D Printing Technology ◽

Passive Devices ◽

3D Printed

The 3D printing technology is catching attention nowadays. It has certain advantages over the traditional fabrication processes. We give a chronical review of the 3D printing technology from the time it was invented. This technology has also been used to fabricate millimeter-wave (mmWave) and terahertz (THz) passive devices. Though promising results have been demonstrated, the challenge lies in the fabrication tolerance improvement such as dimensional tolerance and surface roughness. We propose the design methodology of high order device to circumvent the dimensional tolerance and suggest specific modelling of the surface roughness of 3D printed devices. It is believed that, with the improvement of the 3D printing technology and related subjects in material science and mechanical engineering, the 3D printing technology will become mainstream for mmWave and THz passive device fabrication.

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Effects of Parameters on Surface Roughness of Metal Parts by Selective Laser Melting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.834-836.872 ◽

2013 ◽

Vol 834-836 ◽

pp. 872-875 ◽

Cited By ~ 4

Author(s):

Qun Qin ◽

Guang Xia Chen

Keyword(s):

Surface Roughness ◽

Power Density ◽

Selective Laser Melting ◽

Laser Power ◽

Processing Parameters ◽

Laser Power Density ◽

Laser Melting ◽

Scanning Velocity ◽

Metal Parts ◽

Overlap Ratio

The primary goal of this research is the effects of laser process parameters on surface roughness of metal parts built by selective laser melting. The main processing parameters used to control the surface roughness of melted layers are laser power, scanning velocity and overlap ratio. In our work, an orthogonal experimental design was employed to find the changing rules of the surface roughness through changing SLM processing parameters. The results show that the overlap ratio is the most important factor to affect the surface roughness. When the overlap ratio is below 50%, the surface roughness value of melted layers will decrease with laser power density increasing. When the overlap ratio is higher than or equal to 50%, the surface roughness value increases with the laser power density increasing. The optimal parameters of laser power 143W, scanning velocity 5m/min and overlap ratio 30% can be used to achieve melted layers with the best surface quality in our experiments, and the roughness value increases with slicing thickness increasing and the surface bias angle decreases.

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