| 引用本文: | 张萧笛,廖凯,黄鑫,胡磊.喷砂强化对铝合金薄壁框架件形状的影响及应用[J].材料科学与工艺,2019,27(2):44-49.DOI:10.11951/j.issn.1005-0299.20170189. |
| ZHANG Xiaodi,LIAO Kai,HUANG Xin,HU Lei.Shot peening influence and application on the shape of Al-based alloy thin-walled component[J].Materials Science and Technology,2019,27(2):44-49.DOI:10.11951/j.issn.1005-0299.20170189. |
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| 摘要: |
| 铝合金薄壁框架件铣削加工后会有不同程度的变形，表面喷砂强化既可以提高构件的机械性能，也可以对铣削加工后构件的变形进行矫正，这对构件的变形控制和形状稳定性都具有积极作用.本文针对薄壁件形状特点(壁厚2 mm)，分别对构件底部和薄壁进行喷砂处理，并通过X-ray表面应力测试、表面硬度和变形测试，对喷砂后构件的变形状况进行分析.研究发现, 改变喷砂粒度、空气压力和表面全喷覆次数，对材料表面应力进行调节，可使铣削加工后构件的变形得以调整，一定条件下，其变形矫直率达85%以上.分析认为，薄壁件形状特点与初始内应力水平使得表面应力在薄壁框架件变形中发挥了主要作用.因而，可以在不同位置采用差异化喷砂工艺，对材料表面应力分布进行针对性调节，使喷砂件的形变达到预期要求，最终通过喷砂表面强化实现对薄壁构件变形的调控. |
| 关键词: 铝合金 薄壁框架件 喷砂强化 应力测试 变形调节 |
| DOI：10.11951/j.issn.1005-0299.20170189 |
| 分类号:TG166.3 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51475483)；湖南省高校科技创新团队支持计划项目(2014207)；中南林业科技大学青年科学研究基金重点资助项目 (QJ2012011A)；湖南省研究生科研创新项目(CX2017B405). |
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| Shot peening influence and application on the shape of Al-based alloy thin-walled component |
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ZHANG Xiaodi, LIAO Kai, HUANG Xin, HU Lei
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(School of Mechanical and Electronic Engineering, Central South University of Forestry and Technology, Changsha 410004, China)
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| Abstract: |
| It is known that deformation always occurs after milling processing for the Al-based thin-walled components. Shot peening(SP) can not only improve the mechanical properties of components, but also makes this deformation recover, which plays a positive role in the deformation control and shape stability of components. In this study, based on the shape character with 2 mm wall, the deformation of components is investigated by X-ray stress determination, surface hardness and shape measurement experiments via SP treatment on bottom and wall. It is found that altering the particles size, air pressure and 100% coverage time can regulate the surface stress, which can adjust the deformation of milling component straighten to 85%. The conclusions show that the shape character and initial stress level determines the surface stress, which plays a key role in the component deformation. SP treatment can be used on different places of the component to adjust the surface stress distribution, which makes the recovery of deformation to get the expected goal and achieves the control of recovery. |
| Key words: Al alloy thin-walled component shot peening stress measurement deformation adjustment |
