• Infrared and Laser Engineering
  • Vol. 52, Issue 3, 20220436 (2023)
Jiaxuan Cai1, Tuo Shi2,*, Shihong Shi1, Rongwei Zhang1..., Guang Liu1, Yu Wang1 and Rui Zhuang1|Show fewer author(s)
Author Affiliations
  • 1Institute of Laser Manufacturing Technology, School of Mechanical and Electrical Engineering, Suzhou University, Suzhou 215021, China
  • 2School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215006, China
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    DOI: 10.3788/IRLA20220436 Cite this Article
    Jiaxuan Cai, Tuo Shi, Shihong Shi, Rongwei Zhang, Guang Liu, Yu Wang, Rui Zhuang. Research on laser melting deposition forming process and accuracy of thin-walled hollow bending and torsion structural parts with variable cross-section[J]. Infrared and Laser Engineering, 2023, 52(3): 20220436 Copy Citation Text show less
    Principle diagram of hollow ring power feeding in laser
    Fig. 1. Principle diagram of hollow ring power feeding in laser
    Physical drawing of powder feeding cladding nozzle in laser
    Fig. 2. Physical drawing of powder feeding cladding nozzle in laser
    Geometric model of frame member. (a) Axonometric drawing; (b) Schematic diagram of end face torsion; (c) Bottom end face; (d) Top end face
    Fig. 3. Geometric model of frame member. (a) Axonometric drawing; (b) Schematic diagram of end face torsion; (c) Bottom end face; (d) Top end face
    Schematic diagram of laser melting deposition with different ways. (a) Diagram of horizontal layers; (b) Diagram of normal layers
    Fig. 4. Schematic diagram of laser melting deposition with different ways. (a) Diagram of horizontal layers; (b) Diagram of normal layers
    Method of layering frame members. (a) The structural member is divided into two parts; (b) Getting slice layer; (c) Discreting sedimentary unit
    Fig. 5. Method of layering frame members. (a) The structural member is divided into two parts; (b) Getting slice layer; (c) Discreting sedimentary unit
    Transformation process of base coordinate system and tool coordinate system
    Fig. 6. Transformation process of base coordinate system and tool coordinate system
    Schematic diagram of curve motion path fitting of nozzle
    Fig. 7. Schematic diagram of curve motion path fitting of nozzle
    Schematic diagram of nozzle spot position before compensation. (a) Completing the deposition of the nth layer; (b) Attitude change base point offset
    Fig. 8. Schematic diagram of nozzle spot position before compensation. (a) Completing the deposition of the nth layer; (b) Attitude change base point offset
    Schematic diagram of compensation adjustment. (a) Geometric schematic diagram of variable attitude base point offset; (b) Schematic diagram of nozzle spot position after compensation
    Fig. 9. Schematic diagram of compensation adjustment. (a) Geometric schematic diagram of variable attitude base point offset; (b) Schematic diagram of nozzle spot position after compensation
    Schematic diagram of spatial variable angle growth of sedimentary layer. (a) Growth process of sedimentary layer; (b) Completing the deposition of layer n+1
    Fig. 10. Schematic diagram of spatial variable angle growth of sedimentary layer. (a) Growth process of sedimentary layer; (b) Completing the deposition of layer n+1
    Forming process. (a) "Laser leakage"; (b) Panorama of forming process; (c) Front view of forming process; (d) Side view of forming process
    Fig. 11. Forming process. (a) "Laser leakage"; (b) Panorama of forming process; (c) Front view of forming process; (d) Side view of forming process
    Physical drawing of formed structural parts
    Fig. 12. Physical drawing of formed structural parts
    Comparison diagram of space variable attitude base point offset compensation technology. (a) Not used; (b) Used
    Fig. 13. Comparison diagram of space variable attitude base point offset compensation technology. (a) Not used; (b) Used
    Schematic diagram of actual dimensions of structural members
    Fig. 14. Schematic diagram of actual dimensions of structural members
    Actual wall thickness measurement of structural members. (a) Sampling diagram of measuring points; (b) Wall thickness sampled at different locations
    Fig. 15. Actual wall thickness measurement of structural members. (a) Sampling diagram of measuring points; (b) Wall thickness sampled at different locations
    Microhardness measurement of structural parts. (a) Sampling diagram of measuring points; (b) Microhardness of samples taken at different locations
    Fig. 16. Microhardness measurement of structural parts. (a) Sampling diagram of measuring points; (b) Microhardness of samples taken at different locations
    Microstructure diagram
    Fig. 17. Microstructure diagram
    CompositionCMnPSSiCrNiNFe
    Content0.072.000.050.030.0817.50-19.508.00-10.500.10Bal.
    Table 1. Chemical compositions and content of 304 stain-less steel (mass fraction,wt.%)
    CompositionCSiNiCrBFe
    Content0.11.01.015.01.0Bal.
    Table 2. Chemical compositions and content of Fe314 alloy powder(mass fraction,wt.%)
    Jiaxuan Cai, Tuo Shi, Shihong Shi, Rongwei Zhang, Guang Liu, Yu Wang, Rui Zhuang. Research on laser melting deposition forming process and accuracy of thin-walled hollow bending and torsion structural parts with variable cross-section[J]. Infrared and Laser Engineering, 2023, 52(3): 20220436
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