张勤河
研究领域:1.非传统加工技术及设备;2.产品数字化设计与制造技术(CAD/CAM/CAE); 3.组织切削理论及医疗器械设计开发。
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- 姓名:张勤河
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
机械制造自动化
- 研究兴趣:研究领域:1.非传统加工技术及设备;2.产品数字化设计与制造技术(CAD/CAM/CAE); 3.组织切削理论及医疗器械设计开发。
张勤河,男,1968年3月生人,教授,博士生导师,高能束及其他特种加工技术委员会委员,中国机械工程学会高级会员,山东省电加工学会会员,山东省模具工业协会理事,华东地区机械原理教学研究会副理事长,山东大学非传统加工技术研究室负责人。1990年毕业于山东工业大学第二机械工程系锻造与冲压工艺及设备专业,获工学学士学位;1995年毕业于山东工业大学机械制造及其自动化专业,获工学硕士学位;2003年毕业于山东大学机械制造及其自动化专业,获工学博士学位;主持或参加过多项国家自然科学基金、国家863、国家教育部、山东省科技厅和山东省教育厅资助项目;作为第1研究人员获山东省科技进步二等奖1项;作为主要研究人员获山东省科技进步二等奖3项,获山东省技术发明二等奖一项,获山东省教委科技进步二等奖1项;先后在国内外学术期刊上发表论文100余篇,其中被SCI、EI收录30余篇。2004年应邀到香港中文大学自动化与计算机辅助工程系进行为期一年的合作研究;2007.10-2009.09在美国密西根大学吴贤铭制造技术研究中心进行为期2年的博士后研究工作。2007年入选国家教育部“新世纪优秀人才计划”。共指导博士研究生6人,硕士研究生26人。
研究领域:1.非传统加工技术及设备;2.产品数字化设计与制造技术(CAD/CAM/CAE); 3.组织切削理论及医疗器械设计开发。
个人主页:http://211.86.59.88/jxlj/ReadNews.asp?NewsID=243
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【期刊论文】An investigation of ultrasonic-assisted electrical discharge machining in gas
张勤河, Q.H. Zhang, a, *, R. Du, b, J.H. Zhang, Q.B. Zhang
International Journal of Machine Tools & Manufacture 46 (2006) 1582-1588,-0001,():
-1年11月30日
This study focuses on using ultrasonic to improve the efficiency in electrical discharge machining (EDM) in gas medium. The new method is referred to as ultrasonic-assisted electrical discharge machining (UEDM). In the process of UEDM in gas, the tool electrode is a thin-walled pipe, the high-pressure gas medium is applied from inside, and the ultrasonic actuation is applied onto the workpiece. In our experiment, the workpiece material is AISI 1045 steel and the electrode material is copper. The experiment results indicate that (a) the Material Removal Rate (MRR) is increased with respect to the increase of the open voltage, the pulse duration, the amplitude of ultrasonic actuation, the discharge current, and the decrease of the wall thickness of electrode pipe; and (b) the surface roughness is increased with respect to the increase of the open voltage, the pulse duration, and the discharge current. Based on experimental results, a theoretical model to estimate the MRR and the surface roughness is developed.
Machining, Electrical discharge machining (, EDM), , Ultrasonic-assisted electrical discharge machining (, UEDM),
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【期刊论文】Study on technology of ultrasonic vibration aided electrical discharge machining in gas
张勤河, Q.H. Zhang∗, J.H. Zhang, S.F. Ren, J.X. Deng, X. Ai
Journal of Materials Processing Technology 149 (2004) 640-644,-0001,():
-1年11月30日
Ultrasonic vibration electrical discharge machining (UEDM) in gas is proposed in this paper. It is shown that electrical discharge machining with ultrasonic aid can be achieved well in gas medium. The tool electrode is formed to be thin-walled pipe, and high pressure gas medium is supplied through it. During machining, ultrasonic vibration of workpiece can improve the machining process. The molten workpiece material can be ejected out from base body of workpiece with the aid of ultrasonic vibration and be removed/flushed out of the working gap without being reattached to the electrode. A theoretical model to estimate the material removal rate has been developed. Selecting 45# steel and copper as the workpiece material and electrode material, respectively, experiments have been carried out, the results showing that UEDM is a method with a high material removal rate (MRR). The greatest advantages of this technique are lower pollution and low electrode wear ratio.
UEDM, Gas medium, MRR, Tool electrode wear
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【期刊论文】Ultrasonic vibration electrical discharge machining in gas
张勤河, Q.H. Zhang, J.H. Zhang, J.X. Deng, Y. Qin, Z.W. Niu
Journal of Materials Processing Technology 129 (2002) 135-138,-0001,():
-1年11月30日
A new method of ultrasomic vibration alectrical discharge machining (UEDM) in gas is proposed in this paper, it is shown that alectlical discharge machining (EDM) with ultrasolfic aid can be achieved well in a gas medimn. The tool electrode is formed into a tbin walled pipe, mid a high pressme gas medimn is supplied through it. During machining, ultrasonic vibration of the workpiece cml improve the machinring process. Molten workpiece material can be ejected from the base body of the workpiece with the aid of ultrasolfic vibration mul be removed/flushed out of the working gap without becoming reattached to the alectrode. Selecting #45 steel and copper as the workpiece material and alectrode material, respectively, experiments have been cm-ried out, the results showing that UEDM is a method with a high material removal rate (MRR). The greatest adwntages of this technique are lower pollution and a low electrode wear ratio.
UEDM, Gas medium, MRR, Tool electrode wear
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【期刊论文】Study on the diamond tool drilling of engineering ceramics
张勤河, Q.H. Zhang a, *, J.H. Zhang a, D.M. Sun b, G.D. Wang c
Journal of Materials Processing Technology 122 (2002) 232-236,-0001,():
-1年11月30日
A method for drilling holes in engineering ceramics by using a diamond tool has been developed. In this method, a drilling tool rotates with fixed abrasives. The machining mechanism of drilling based on the fracture mechanics concept is analyzed, and a new theoretical model of the material removal rate is proposed. According to this model, the material removal rate increases in accordance with the increase of the static load applied, the rotational speed of the drilling tool, and the grain size of the abrasive. Selecting 99.5% Al2O3 ceramics as the workpiece material, experiments have been carried out. The results show that diamond drilling is an effective method for machining engineering ceramics.
Engineering ceramic, Diamond tool, Drilling, Machining mechanism
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