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<p>Fused Deposition Modeling (FDM) technology can achieve complex component manufacturing through the layer by layer stacking of thermoplastic materials, but the mechanical properties of its parts are constrained by the synergistic effect of material anisotropy and process path. The traditional uniform filling strategy is difficult to solve the contradiction between stress field distribution and process stability, while existing optimization methods generally have process bottlenecks such as discontinuous paths and weak interlayer bonding. Therefore, this article proposes a stress field direction guided path planning method, which extracts the direction field of the stress field and performs global continuous filling path planning for stress field direction guidance. While ensuring process continuity, achieve directional strengthening of the parts. In terms of planar filling path planning, the cutting plane of the model to be printed is discretized into polygonal topological elements through dynamic geometric subdivision algorithm, and a mapping model between the spatial stress field direction and the planar discrete elements is established to construct a planar mesh division with stress field direction characteristic response; By introducing a direction consistency weight penalty function and dynamically adjusting the connection weights between adjacent units, a direction oriented tree structure is constructed to guide the path direction to be consistent with the direction of the stress field. In terms of interlayer filling path planning, a dynamic interleaved printing strategy based on stress field direction response is proposed to address the challenge of balancing interlayer performance adaptation and path continuity. This strategy achieves collaborative enhancement of interlayer performance and effectively improves interlayer bonding strength. The stress field direction guided filling path generation and corresponding mechanical experiments conducted show that the method proposed in this paper can control the local path direction based on the direction field of the input stress field while ensuring the continuity of the intra layer path, achieve mechanical performance optimization under specific working conditions, and support the full filling printing path generation of FDM.</p>

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FDM continuous filling path planning method based on stress field direction guidance

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • Zhengyu Li,
  • Yingjun Wang,
  • Yuan Yao

摘要

Fused Deposition Modeling (FDM) technology can achieve complex component manufacturing through the layer by layer stacking of thermoplastic materials, but the mechanical properties of its parts are constrained by the synergistic effect of material anisotropy and process path. The traditional uniform filling strategy is difficult to solve the contradiction between stress field distribution and process stability, while existing optimization methods generally have process bottlenecks such as discontinuous paths and weak interlayer bonding. Therefore, this article proposes a stress field direction guided path planning method, which extracts the direction field of the stress field and performs global continuous filling path planning for stress field direction guidance. While ensuring process continuity, achieve directional strengthening of the parts. In terms of planar filling path planning, the cutting plane of the model to be printed is discretized into polygonal topological elements through dynamic geometric subdivision algorithm, and a mapping model between the spatial stress field direction and the planar discrete elements is established to construct a planar mesh division with stress field direction characteristic response; By introducing a direction consistency weight penalty function and dynamically adjusting the connection weights between adjacent units, a direction oriented tree structure is constructed to guide the path direction to be consistent with the direction of the stress field. In terms of interlayer filling path planning, a dynamic interleaved printing strategy based on stress field direction response is proposed to address the challenge of balancing interlayer performance adaptation and path continuity. This strategy achieves collaborative enhancement of interlayer performance and effectively improves interlayer bonding strength. The stress field direction guided filling path generation and corresponding mechanical experiments conducted show that the method proposed in this paper can control the local path direction based on the direction field of the input stress field while ensuring the continuity of the intra layer path, achieve mechanical performance optimization under specific working conditions, and support the full filling printing path generation of FDM.