滚磨光整加工中新型磨液对7075铝合金加工效果的影响分析

高志森; 石慧婷; 王嘉明; 李秀红; 李文辉; 杨胜强

doi:10.13433/j.cnki.1003-8728.20200060

滚磨光整加工中新型磨液对7075铝合金加工效果的影响分析

doi: 10.13433/j.cnki.1003-8728.20200060

高志森^{1, 2,},
石慧婷^{1, 2},
王嘉明^{1, 2},
李秀红^{1, 2, ,},
李文辉^{1, 2},
杨胜强^{1, 2}

1.
太原理工大学机械与运载工程学院, 太原 030024
2.
精密加工山西省重点实验室, 太原 030024

基金项目:

国家自然科学基金项目 51875389

国家自然科学基金项目 51975399

山西省自然科学基金项目 201801D111002

详细信息

作者简介:
高志森(1994-), 硕士研究生, 研究方向为零件表面光整加工、精密加工, gzs289314@163.com

通讯作者:
李秀红, 教授, 博士, xhli7489@sina.com

中图分类号: TH161⁺.14
计量
- 文章访问数: 235
- HTML全文浏览量: 68
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2019-11-05
- 刊出日期: 2021-03-01

Effect of New Type Liquid Medium on Surface Quality in Barrel Finishing of 7075 Aluminum Alloy

GAO Zhisen^{1, 2
,},
SHI Huiting^{1, 2},
WANG Jiaming^{1, 2},
LI Xiuhong^{1, 2
, ,},
LI Wenhui^{1, 2},
YANG Shengqiang^{1, 2}

1.
College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
Shanxi Province Key Laboratory of Precisely Machining, Taiyuan 030024, China

摘要

摘要: 通过配制不同浓度的滚磨光整加工磨液，对7075铝合金试件进行滚磨光整加工实验。加工50 min后，在磨液仅为去离子水的情况下，试件表面光亮度最差、表面划痕较多、表面粗糙度值变化率和材料去除率最小，粗糙度值Ra从1.233 μm减小到0.406 μm，材料去除率MRR为0.043 mm³/min；当磨液中Na₂SiO₃·9H₂O与CH₄N₂S配比为1∶1的时，滚磨光整后表面光亮度最好，表面无划痕，表面粗糙度值变化率最大，粗糙度值Ra从1.290 μm减小到0.169 μm；在添加有化学剂的磨液作用下，试件表面组织出现晶粒细化现象，晶粒的平均尺寸减小且数量增多。在滚磨光整加工中磨液对7075铝合金试件的表面光亮度、表面粗糙度、材料去除率具有重要影响，能够显著提高试件的表面质量；在Na₂SiO₃·9H₂O和CH₄N₂S为1∶1的比例时加工效果最佳，磨液成分与试件表面晶粒细化具有一定关系。
- 滚磨光整加工 /
- 磨液 /
- 7075铝合金 /
- 表面质量 /
- 晶粒细化
Abstract: Different concentrations of grinding fluids were prepared for rolling finishing of 7075 aluminum alloy specimens. When the grinding fluid is only deionized water, after finishing for 50 min, the surface brightness of the specimen was the worst, the surface scratches were more, the change rate of surface roughness value and the material removal rate were the smallest, the roughness value Ra decreased from 1.233 μm to 0.406 μm, and the material rate of surface roughness value was the greatest. The roughness value Ra decreased from 1.290 μm to 0.169 μm. Under the action of grinding fluid with chemical additives, the grain refinement occurred in the specimen surfaces, and the average grain size decreased and the number increased. Grinding fluid plays an important role in the surface brightness, surface roughness and material removal rate of 7075 aluminum alloy specimens in rolling finishing, which improves the surface quality of specimens. When the ratio of Na₂SiO₃·9H₂O and CH₄N₂S is 1∶1, the surface quality is the best, and the composition of grinding fluid has a certain relationship with the surface grain refinement of specimens.
- barrel finishing /
- liquid medium /
- 7075 aluminum alloy /
- surface quality /
- grain refinement

HTML全文

图 1 BJL-LL05型立式离心式滚磨光整加工设备

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图 2 试件表面光亮度

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图 3 滚磨光整加工磨液对7075铝合金粗糙度的影响曲线

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图 4 滚磨光整加工磨液的材料去除率不同加工时间的对比变化

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图 5 试件表面组织形貌

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图 6 试件截面组织形貌

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表 1 7075合金的化学成分 %

w(Cu)	w(Mg)	w(Zn)	w(Mn)	w(Fe)	w(Si)	w(Al)
1.67	2.22	5.59	0.30	0.35	0.20	其余

下载: 导出CSV

表 2 滚磨光整加工磨液主要成分

主要成分	含量
C₁₈H₂₉NaO₃S	6.5 g
C₂₄H₄₇NO₄	90 mL
NaF	1.5 g
H₂O₂	6 mL
去水离子	304 mL
Na₂SiO₃·9H₂O+CH₄N₂S	0.6 g

下载: 导出CSV

表 3 滚磨光整加工磨液主要成分比例

成分	比例	含量/g
Na₂SiO₃·9H₂O∶CH₄N₂S	0∶0	0∶0
	0∶1	0∶0.6
	1∶0	0.6∶0
	1∶1	0.3∶0.3
	1∶2	0.2∶0.4
	2∶1	0.4∶0.2

下载: 导出CSV

表 4 BJL-LL05实验设备主要参数

参数	数值
功率	1.5 kW
传动比	-1
滚筒体积	1.25 L×4
转速	300 r/min

下载: 导出CSV

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