西安交通大学机械制造系统工程国家重点实验室,西安,710054
网络首发:2014-12-10,
纸质出版:2014
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池金春 1, 张安峰 1, 谢士兴 1, 等. 电弧喷涂快速模具内应力检测和喷涂工艺优化[J]. 西安交通大学学报, 2014,48(12):126-130.
Process Optimization and Residual Stress Measurement for Arc Spraying Rapid Tooling[J]. 2014, 48(12): 126-130.
池金春 1, 张安峰 1, 谢士兴 1, 等. 电弧喷涂快速模具内应力检测和喷涂工艺优化[J]. 西安交通大学学报, 2014,48(12):126-130. DOI: 10.7652/xjtuxb201412020.
Process Optimization and Residual Stress Measurement for Arc Spraying Rapid Tooling[J]. 2014, 48(12): 126-130. DOI: 10.7652/xjtuxb201412020.
以降低电弧喷涂厚涂层内应力为目的
对曲率法所依据的Stoney公式进行了修正。采用修正后的曲率法较稳定可靠地检测出了厚涂层的平均内应力
优化了喷涂工艺
提高了模具的成形精度
并成功应用于长为2 m的汽车外饰钣金件冲压模具制作。实验研究喷涂工艺(喷涂距离、喷涂电流、扫描轨迹和扫描速度)与涂层内应力之间的定量关系后发现:涂层内应力与单层涂层厚度呈现相似的变化趋势
但变化比例并不是一一相对应的; 内应力随喷涂距离和扫描速度的增加以及喷涂电流的减小而递减
受扫描轨迹影响最显著。通过优化工艺
使涂层内应力降低了27.5%~63.9%。
To reduce the residual stress in thick arc spraying coatings
Stoney formulation
which is the basis of the curvature method
was modified to reliably test the average residual stress. The process was then optimized with improved accuracy and was successfully applied to manufacturing a long stamping die of 2 m for an automobile external sheet metal part. Experimentally analyzing the relationship of the process parameters such as spraying distance
current
scanning path and speed with the residual stress
it is found that residual stress similarly tends to vary as the single layer coating thickness but with different varying proportion; residual stress is most significantly influenced by scanning path; the stress decreases steadily with the increasing spraying distance and scanning speed
and with the reducing spraying current; the residual stress is finally reduced by 27.5% to 63.9% via optimizing the process parameters.
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