赵广军,赵国伟,姜春茂,等.某产品组合壳体机加工艺改进[J].精密成形工程,2013,5(6):23-26,35.
ZHAO Guang-jun,ZHAO Guo-wei,JIANG Chun-mao,et al.Improvement on Processing Technology of a Product Combination Casing[J].Journal of Netshape Forming Engineering,2013,5(6):23-26,35. |
| 某产品组合壳体机加工艺改进 |
| Improvement on Processing Technology of a Product Combination Casing |
| 投稿时间：2013-08-20 修订日期：2013-10-01 |
| DOI：10.3969/j.issn.1674-6457.2013.06.006 |
| 中文关键词: 组合壳体 同轴度 夹具 装夹误差 焊接残余应力 变形 |
| 英文关键词: composite shell alignment fixture clamping error welding residual stress deformation |
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| 中文摘要: |
| 某产品为分体组合结构,由上壳体和下壳体组成,采用螺纹连接,其中下壳体为装配焊接件,结构较为复杂,且组合壳体又有较高同轴度精度要求,在加工时易出现同轴度超差,加工废品率较高。 通过优化调整加工工艺,减少装夹次数,消除了累积装夹误差;通过调整装夹定位基准,改进夹具结构,提高了装夹精度;通过延长下壳体套筒焊接后自然时效时间,消除焊接残余应力,避免了因焊接应力引起的壳体加工变形;通过优化切削参数,降低切削力,防止了下壳体装配件薄壁套筒的加工变形。 通过以上工艺技术改进,提高了壳体加工精度,使组合壳体同轴度加工精度满足了产品设计要求。 |
| 英文摘要: |
| In the case that a product has a fission combination structure, composed of upper shell and lower shell with threaded connection, of which the lower shell is an assembly welding part with relatively complex structure and the shell combination composite requires high alignment accuracy, coaxial degree error is easy to occur during processing and machining scrap rate could be higher. In this research, accumulated clamping error was eliminated by optimizing and adjustment of the process and decreasing the times of clamping and thus eliminating accumulative errors; the clamping accuracy was increased by adjusting the clamping positioning base and improving the structure of fixture; shell distortion caused by welding stress was avoided by extending the natural aging time after shell sleeve welding and eliminating the welding residual stress; deformation of the thin-walled sleeve, i. e, the lower shell assembly part, was prevented by optimizing cutting parameters and decreasing cutting force. Through the above improvement of processing technology, the machining accuracy of the shell was improved, and the composite shell alignment precision satisfied the requirement of product design. |
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