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| V型曲面坡口打底焊成形控制与工艺参数优化 |
| Forming Control and Process Parameter Optimization of V-shaped Surface Groove Backing Welding |
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| DOI：10.3969/j.issn.1674-6457.2023.02.022 |
| 中文关键词: 打底焊 曲面坡口 响应面法 成形控制 工艺优化 |
| 英文关键词: backing welding curved groove response surface methodology forming control process optimization |
| 基金项目:福建省科技重大专项(2020HZ03018) |
| Author Name | Affiliation | | WENG Hua-jing | School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China | | FENG Mei-yan | School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China | | JIANG Ji-bin | School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China | | CHEN Chang-rong | School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China | | LIAN Guo-fu | School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China |
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| 中文摘要: |
| 目的 研究熔化极气体保护焊工艺参数对V型曲面坡口打底焊焊接接头形貌及硬度的影响规律，实现焊接接头工艺参数的预测与优化，提高焊接质量。方法 基于响应面Box‒Benhnken方法，分析焊接电压、焊接电流、焊接速度、曲面弧度对焊接接头成形与性能的影响规律，构建工艺参数与焊接接头响应指标的数学模型。结果 试验结果表明，熔宽随焊接电压、焊接电流的增大而增大，随焊接速度、曲面弧度的增大而减小。面积随焊接电压、焊接电流、曲面弧度的增大而增大，随焊接速度的增大而减小。硬度随焊接电压的增大而减小，随焊接速度、曲面弧度的增大而增大。以熔宽、面积及硬度最大为优化目标，最优工艺参数为电压26 V，电流260 A，焊接速度26 cm/min，曲面弧度 (13/36π) rad。对比预测值与实际值，熔宽、面积、硬度的误差率分别为4.2%、3.8%、2.3%。结论 研究结果表明了所构建数学模型的可靠性，为非对称曲面坡口及其他特殊结构焊缝的成形控制与参数优化提供了理论依据。 |
| 英文摘要: |
| The work aims tostudy the influence of process parameters of gas metal arc welding (GMAW) on the morphology and hardness of V-shaped surface groove backing welding joint, in order to realize the prediction and optimization of welding joint process parameters and improve the welding quality. Based on the response surface Box-Benhnken method, the effects of welding voltage, welding current, welding speed and surface radian on the forming and performance of welded joints were analyzed. The mathematical model of process parameters and response index of welded joints was constructed. The test results showed that the melting width increased with the increase of welding voltage and welding current, and decreased with the increase of welding speed and surface radian. The area increased with the increase of welding voltage, welding current and surface radian, and decreased with the increase of welding speed. The hardness decreased with the increase of welding voltage, and increased with the increase of welding speed and surface radian. The optimal goal was to maximize the melting width, area and hardness, and the optimum process parameters were as follows:voltage of 26 V, current of 260 A, welding speed of 26 cm/min and surface radian of 13/36π rad. By comparing the predicted value with the actual value, the error rates of welding width, area and hardness were 4.2%, 3.8% and 2.3%, respectively. The research results show the reliability of the established mathematical model, and provide a theoretical basis for forming control and parameter optimization of welds with asymmetric curved grooves and other special structures. |
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