Scholarlink

This study addresses the issue of accuracy degradation in high-precision plane linear guideways during long-term service. A multi-scale experimental-simulation coupling method is employed to reveal the synergistic effect of residual stress gradient and material creep behavior. Based on the modeling of layered residual stress in 38CrMoAl guideways and uniaxial creep experiments, a simplified constitutive equation considering the stress exponent effect is developed. It is found that the displacement of the 700 MPa high-stress model after 3 months reaches 0.4337 mm, which is 15.4 times higher than that of the 300 MPa baseline group. Cross-scale microstructure characterization indicates that the hardness gradient and banded structure of the rolled material promote uneven stress release, causing preferential directional creep in the coarse-grain region. Based on these findings, two optimization criteria are proposed: residual stress threshold control (≤500 MPa) and operational condition matching for φ100/φ160 rolled materials. The results provide theoretical guidance and engineering solutions for the lifespan prediction and manufacturing process improvement of high-precision guideways.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mechanism of Accuracy Degradation and Optimization of Plane Linear Guideways under Residual Stress and Creep

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

查看全文
  • Xiaozhi Yang,
  • Xiao Cao,
  • Huizhen Wang,
  • Xifeng Wang,
  • Yuewen Zhai,
  • Weidong Zhu,
  • Zibo Zhang,
  • Yu Yang

摘要

This study addresses the issue of accuracy degradation in high-precision plane linear guideways during long-term service. A multi-scale experimental-simulation coupling method is employed to reveal the synergistic effect of residual stress gradient and material creep behavior. Based on the modeling of layered residual stress in 38CrMoAl guideways and uniaxial creep experiments, a simplified constitutive equation considering the stress exponent effect is developed. It is found that the displacement of the 700 MPa high-stress model after 3 months reaches 0.4337 mm, which is 15.4 times higher than that of the 300 MPa baseline group. Cross-scale microstructure characterization indicates that the hardness gradient and banded structure of the rolled material promote uneven stress release, causing preferential directional creep in the coarse-grain region. Based on these findings, two optimization criteria are proposed: residual stress threshold control (≤500 MPa) and operational condition matching for φ100/φ160 rolled materials. The results provide theoretical guidance and engineering solutions for the lifespan prediction and manufacturing process improvement of high-precision guideways.