Research on Forming Quality of Overhanging Round Hole by Selective Laser Melting

Shengqin, 段声勤 Duan; Tingting, 刘婷婷 Liu; Wenhe, 廖文和 Liao; Changdong, 张长东 Zhang; Yang, Tiankui

doi:10.3788/cjl201845.0402007

Cited by 4 publications

(3 citation statements)

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“…The Ti6Al4V lattice structures were manufactured in the Concept Laser M2 metal AM equipment. The process parameters [ 39 ] were: laser power 180 W, scanning speed 1250 mm s −1 , laser spot compensation radius 0.03 mm, powder layer thickness 0.03 mm, and single pass scanning strategy. Table 1 lists the chemical composition of Ti6Al4V powders.…”

Section: Methodsmentioning

confidence: 99%

Comparison of Compression Performance and Energy Absorption of Lattice Structures Fabricated by Selective Laser Melting

Shi

Liao

et al. 2020

Adv Eng Mater

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Section: Methodsmentioning

confidence: 99%

Comparison of Compression Performance and Energy Absorption of Lattice Structures Fabricated by Selective Laser Melting

Shi

Liao

et al. 2020

Adv Eng Mater

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“…Di Wang et al [20] has studied the quality of the overhanging structure was improved by decreasing the laser energy density by using 316L stainless steel powder to print circular surface models. Duan Shengqin et al [21] has optimized the surface quality of the overhanging circular hole by changing the laser power, scanning line angle and number of contour scans. Shaochuan Feng et al [22] related roundness and shape deviation of circular channels to melt pool morphology, thermal stress, spot compensation and scanning strategy to reduce shape deviation by changing spot compensation, reducing energy density, and selecting scanning strategy with 0° or 45° rotation.…”

Section: Introductionmentioning

confidence: 99%

Design and Flow Analysis of Special-Shaped Cross-Section Flow Channel Based on Selective Laser Melting

Zhao,

Zhai,

Wang

et al. 2023

J. Phys.: Conf. Ser.

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Selective laser melting has the potential to be applied into hydraulic pipelines manufacturing because it can realize the forming of flow channels with arbitrary direction and curvature. Due to the stacking of layers, selective laser melting still has many limitations while processing complex flow channels. In particular, the manufacturing of overhanging structures with circular cross sections needs to use internal supports to prevent surface collapse, which is challenging to be removed. Therefore, it is necessary to optimize the flow channel with a self-supporting ability, then systematically discussing its forming quality with the influence on fluid dynamics to compromise. In this paper, a simplified multi-channel structure with 1 inlet and 4 outlets is extracted from a hydraulic valve block of an aero-engine system, and the cross-section of its branch channel is re-designed to guarantee its self-supporting ability based on additive manufacturing optimization strategy. Numerical simulation was used to analyze the influence of different shape sections on the pressure loss and mass flow rate of multi-channel structure. The results show that the pressure loss and outlet flow of the 45° rhombus + ellipse section are the closest to the circular area. According to the maximum internal deformation of the three outlets, the 65° rhombus section has the better forming quality and the non-circular section is not the worst.

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“…Wu et al discovered that lower inclination angles resulted in a decrease in the overall overhanging layer performance [ 19 ]. Finally, Duan et al printed a cylindrical-shaped inner hole and found that laser power significantly impacted the overhanging surface quality, with increasing laser power leading to an increase in the roundness value, but a decrease in the dimension accuracy [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Surface Quality of Selective Laser Melted Cylindrical- and Parallelepipedic-Shaped Inner Structure

Mao

Shen

2023

Materials

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A systematic study was conducted to investigate the distinct mechanisms involved in the formation of the inner surfaces of cylindrical and parallelepipedic-shaped structures. The surface roughness, flatness, and sinking distance were used as key indices to measure the quality of overhanging surfaces, while the surface flatness and roughness were used to evaluate the quality of the side and bottom surfaces of the inner hole. The inner surface morphology was observed using a scanning electron microscope and a white light interferometer. The test results show that the quality of the overhanging surface had a significant impact on the quality of the parallelepipedic-shaped inner hole. In contrast, the cylindrical-shaped inner hole had a shorter but more uniformly distributed overhanging surface, resulting in a different behavior of the overhanging and side surface quality. An improved model of the overhanging surface was established by combining all of the above results and comparing them with the traditional Euler Bernoulli beam model. The factors affecting the quality of the overhanging surface were analyzed, and measures for improving the quality of the overhanging surface during the SLM manufacturing process were proposed.

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Research on Forming Quality of Overhanging Round Hole by Selective Laser Melting

Cited by 4 publications

References 0 publications

Comparison of Compression Performance and Energy Absorption of Lattice Structures Fabricated by Selective Laser Melting

Comparison of Compression Performance and Energy Absorption of Lattice Structures Fabricated by Selective Laser Melting

Design and Flow Analysis of Special-Shaped Cross-Section Flow Channel Based on Selective Laser Melting

A Study on the Surface Quality of Selective Laser Melted Cylindrical- and Parallelepipedic-Shaped Inner Structure

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