第
29
卷第
2
期
湖南科技大学学报{自然科学版}
2014
年
6
月
Journal
of Hunan University
of
Science & Technology( Natural Science Edition)
doi
:10.
13582/j.
cnki.
1672
-9102.2014.02.006
Vo
l.
29
No.2
Jun.
2014
7075 -
T6
铝合金单向超声振动车削表面
质量及形貌特征
采晓明,胡斌梁,周知进
(湖南科技大学机械设备健康维护省重点实验室,湖南湘潭
411201
)
摘
要:对
7075
-四铝合金试件采用普通切削(
CT)
和振动切削
(UVC)
加工方法进行了加工实验,分析了
2
种切削加
工方法在不同参数下对铝合金试件加工表面粗糙度的影响.试验研究结果表明:在相同的进给量和切削深度情况下,随着
车削速度的变化,普通切削获得的加工表面粗糙度先减小后增大再减小,但随着转速的增大进入高速切削后,工件表面粗
糙度值逐渐趋于稳定;随着进给量的增加超声振动硬车削与普通硬切削加工表面粗糙度都呈上升趋势,超声振动切削表面
粗糙度较小;在切削速度、进给量相同的条件下,普通硬质切削
7075
铝合金加工表面粗糙度随着切削深度的增加而增加,
而超声振动切削
7075
铝合金加工表面粗糙度随着切削深度的增加先减小后增加.通过对获得实验数据的分析以及对车削
加工获得的加工表面显微形貌的观测,证实了超声振动加工在难加工材料加工中的优势.
关键词
:7075
-T6
铝合金;普通车削;超声振动车削;表面粗糙度
中图分类号
:TG506.5
文献标志码
:A
文章编号
:1672
-9102(2014)02
-0027-04
Research on unidirectional ultrasonic vibrations turning
7075 - T6 aluminum alloy surface quality
and
morphology
Luan Xiao - ming, HU Bin
-liang
, ZHOU Zhi -
jin
(Hunan
Provincial
Keylaboratory
of
Health
Maintenance
for
Mechanical
Equipment
,
Hunan
University
of
5cience
and
Technology
,
xi
四
gtan
411201
,
China)
Abstract:
7075 - T6 aluminum alloy specimens were tested for machining
expe
丘
ments
by using ordinary
cutting
(CT)
and
the vibration cutting
(UVC)
processing methods , to analyze the i
nf1
uence of cutting
parameters on the work
piece
surface roughness. Experimental results
show
出
at:
In the same amount of feed and
depth of
cut
, speed with the turning changed, the surface roughness of ordinary cutting reduced first decreases
and
then
increases again , but with the speed increased into the high - speed, the surface roughness become
stable;
The surface roughness uptrend with the feed rate increased of ultrasonic vibrations hard turning and
ordinary hard cutting;
In
the same cutting
speed
and
feed rate, with cutting depth increased ,7075 Aluminum
ordinary hard cutting surface roughness increased
, but the ultrasonic vibration cutting surface roughness first
decrease
and
then increase.
Th
rough the analysis of experimental data obtained
and
the observations of the
microscopic morphology of the machined surface after turning
, the advantage of ultrasonic vibration machining in
difficult materials processing is confirmed.
Key
words:
7075 - T6 aluminum alloy; turning; ultrasonic vibration turning; surface roughness
收稿日期
:2014
一
03
-03
基金项目:湖南省自然科学基金资助项目
(520
1O
J5042)
;湖南科技大学研究生创新基金项目(
5120017)
通信作者:胡斌梁(1
965
→,男,湖南双峰人,博士,教授,主要从事机械制造、精密测量技术、图像处理等方面的教学与研究.
E-
mail
,
blhu@
hus
t.
edu.
cn