唐军,陈小静,赵波.微织构刀具超声铣削航空铝合金的研究[J].表面技术,2021,50(5):356-363.
TANG Jun,CHEN Xiao-jing,ZHAO Bo.Study on the Ultrasonic Milling Aviation Aluminum Alloy with Micro Texture Cutter[J].Surface Technology,2021,50(5):356-363 |
| 微织构刀具超声铣削航空铝合金的研究 |
| Study on the Ultrasonic Milling Aviation Aluminum Alloy with Micro Texture Cutter |
| 投稿时间：2020-04-25 修订日期：2020-07-24 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.05.040 |
| 中文关键词: 微织构刀具 纵扭复合超声铣削 表面粗糙度 显微硬度 残余应力 |
| 英文关键词:micro-texture cutting tool longitudinal-torsional compound ultrasound milling surface roughness microhardness residual stress |
| 基金项目:河南省高等学校重点科研项目(21A460022);河南省科技攻关项目(202102210113);国家自然科学基金(51475148) |
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| 中文摘要: |
| 目的 为了提高7075航空铝合金的使用性能，将微织构刀具和纵扭复合超声铣削复合，形成一种微织构刀具超声复合铣削工艺。方法 通过微织构刀具铣削和微织构纵扭复合超声铣削两种加工方法，对7075-T6航空铝合金进行切削试验，分析主轴转速、每齿进给量以及铣削深度对工件表面粗糙度、残余应力、显微硬度和表面织构形貌的影响。结果 在切削参数相同的情况下，微织构纵扭复合超声铣削工艺所获工件表面粗糙度数值相较于微织构刀具铣削工艺加工工件降低了4.7%~13.2%，显微硬度增加了1.13%~2.35%，工件表面残余应力变为压应力，最大数值稳定在–10.84 MPa，加工工件表面形成了较为统一、规整的“鱼鳞网纹”织构形貌。其中，加工工件表面粗糙度数值与主轴转速成负相关关系，而与铣削深度、每齿进给量成正相关。加工工件表面显微硬度和残余应力则是随着主轴转速和每齿进给量的增大而增大，而铣削深度对加工工件的显微硬度和残余应力的影响不显著。结论 相比微织构刀具铣削，微织构纵扭复合超声铣削能有效地改善加工工件表面的完整性。 |
| 英文摘要: |
| In order to improve the working performance of 7075 aviation aluminum alloy, the micro-texture ultrasonic tool milling process is proposed by combining micro-texture tool and longitudinal-torsional composite ultrasonic milling. The cutting experiments of 7075-T6 aluminum alloy was carried out by micro-texture tool milling and the micro-texture longitudinal- torsional compound ultrasonic milling. The effect of the cutting parameters, such as spindle speed, feed per tooth and milling depth, on the surface roughness, residual stress, microhardness and surface texture of the workpiece was analyzed. The results showed that under the same cutting parameters, the surface roughness of workpiece obtained by microtexture ultrasonic milling was reduced by 4.7%~13.2%, the microhardness is increased 1.13%~2.35%, and the surface maximum residual stress was stabilized at –10.84 MPa. And the “fish scale reticulation” texture was formed on the surface of the machined workpiece. In addition, the workpiece roughness was negatively correlated with spindle speed, and positively correlated with milling depth and feed per tooth. With the increase of spindle speed and feed per tooth, the surface micro-hardness and residual stress of workpiece increased gradually. The effect of milling depth on micro-hardness and residual stress of workpiece was not significant. Finally, compared with micro-texture tool milling, the micro texture longitudinal-torsional compound ultrasonic milling can effectively improve the integrity of workpiece surface. |
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