|
| 空化水射流在渐进成形与冲蚀领域的对比分析 |
| Comparative Analysis of Cavitation Waterjet in the Field of Incremental Forming and Erosion |
| Received:December 19, 2023 |
| DOI：10.3969/j.issn.1674-6457.2024.02.004 |
| 中文关键词: 渐进成形 空化 靶距 粗糙度 工艺参数 |
| 英文关键词: incremental forming cavitation target distance roughness process parameters |
| 基金项目:国家自然科学基金(52105414) |
| Author Name | Affiliation | | XUE Wenhao | College of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710021, China
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Guangdong Shenzhen 518055, China | | WU Xiaojun | College of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710021, China | | ZHANG Feifei | Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Guangdong Shenzhen 518055, China | | HE Kai | Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Guangdong Shenzhen 518055, China |
|
| Hits: 947 |
| Download times: 366 |
| 中文摘要: |
| 目的 将高压水射流渐进成形技术与空化现象相结合，探索一种新的加工形式——空化水射流渐进成形技术，研究不同空化喷嘴内部结构、工作靶距对成形和冲蚀的影响。方法 设计了5种不同内部结构的空化喷嘴，在相同工艺参数和不同靶距的条件下，对厚度为0.5 mm、尺寸为200 mm×200 mm的5052铝合金板以及厚度为10 mm、尺寸为50 mm×50 mm的1060铝合金块进行成形和冲蚀实验，测量样品成形高度和冲蚀损失质量，观察电子显微镜下样品的冲蚀外貌形态。结果 喷嘴内部结构对空化效果有很大影响，有锥形扩散段的喷嘴空化效果更好，作用半径更大。喷嘴的作用区域呈3层圆环状，由许多涡旋组合而成。产生的空泡沿流动方向运动，在靶体附近溃灭，释放冲击力。在成形和冲蚀2种工况下，均存在最佳靶距，且随着靶距的增大，空化水射流的表面形态也发生变化，圆环的第1层直径保持不变，第2层、第3层直径显著增大。结论 空化喷嘴的内部结构和靶距对空化水射流成形和冲蚀的影响较大，在实际生产应用中应根据使用场景、工作范围选择合适的工艺参数，以提高效率。 |
| 英文摘要: |
| The work aims to combine the high-pressure waterjet incremental forming technology with the cavitation phenomenon to explore a new form of processing, namely cavitation waterjet incremental forming technology, and study the effects of different internal structures of cavitation nozzles and working target distance on forming and erosion. Five different types of cavitation nozzles were designed, and the forming and erosion experiments were carried out on 5051 aluminium alloy sheet with a thickness of 0.5 mm and a length and width of 200 mm×200 mm and 1060 aluminium alloy block with a thickness of 10 mm and a length and width of 50 mm×50 mm under the same process parameters and different target distance. The forming height and the mass loss by erosion were measured and the external morphology was observed with an electron microscope. The internal structure of the nozzle had a great impact on the cavitation effect. The nozzle with a conical diffusion section had more significant cavitation effect and the action scope of the nozzle presented three layers of a rings, formed by a combination of many vortexes. The bubble generated by cavitation waterjet moved along the flow direction and collapsed in the vicinity of the target and released the impact force. Both the two conditions, including forming and erosion, had optimum target distance, and with the increase of the target distance, the surface morphology of the cavitation waterjet also changed. The diameter of the first layer of the circle remained constant, while that of the second and third layers increased significantly. The internal structure and target distance have a large impact on the cavitation water jet forming and erosion, and the appropriate process parameters should be selected according to the use of scenarios and working range in order to improve the efficiency in the actual production application. |
|
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
渝公网安备 50010702501719号