张大卫
1.机械动力学;2.自动化表面工程技术;3.现代制造装备与系统。
个性化签名
- 姓名:张大卫
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
机械制造自动化
- 研究兴趣:1.机械动力学;2.自动化表面工程技术;3.现代制造装备与系统。
张大卫 教授,产品设计与制造技术研究所所长
主要学历:
1980.09-1984.07 沈阳工业大学 机械制造及工艺装备专业 本科生
1987.09-1990.03 天津大学 机械制造及其自动化专业 硕士研究生
1992.09-1995.09 天津大学 机械制造及其自动化专业 博士研究生
主要学术经历:
1984.07-1987.09 天津第十八研究所 助理工程师
1990.03- 至今 天津大学机械工程系 讲师(1990)/副教授(1993)/教授(1997)/博士生导师(2000)
1998.07-1999.11 香港科技大学访问学者
2003.12-2005.01 英国 Warwick 大学和日本东京工业大学访问学者
2009.07-2009.12 澳大利亚莫纳什大学访问学者
专业:机械制造及自动化
主要研究方向:
1.机械动力学
2.自动化表面工程技术
3.现代制造装备与系统
主要学术兼职:
1.IMCC制造技术国际会议工作委员会委员
2.全国高校制造技术与机床研究会理事
3.全国机械动力学学会理事
4.天津市振动工程学会理事
主要学术成就、奖励及荣誉:
长期从事机械结构动态设计方法、超精密定位技术、高速静电涂装技术、激光熔覆技术等方面的教学和科研工作,近十年来,主持国家和省市部委自然科学基金、国家863高科技发展计划、国家NC机床重大专项、横向课题20余项,在国内外学术刊物和会议上共发表论文80余篇,被SCI收录21篇,获国家发明专利5项,获国家教育部和天津市科技进步奖3项,天津市自然科学奖1项。
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主页访问
1859
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关注数
0
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成果阅读
674
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成果数
13
张大卫, 田延岭, 张弋卫, 闰兵
天津大学学报,2004,37(3):239~244,-0001,():
-1年11月30日
为了得到一个结构紧凑无摩擦、无磨损且高效率的微进给装置,分析了具有任意角度椭圆凹槽弹性铰链的特性,得到其在不同载荷作用下刚度的封闭解析解,并讨论了弹性铰链的刚度随椭圆长短轴之比s变化时的情况当s由1变化到无穷大时,即由圆形凹槽的弹性铰链经过椭圆凹槽的弹性铰链变化到矩形凹槽的弹性铰链,弹性铰链的刚度逐渐减小,由此引起的应力集中也逐渐减小,但是其运动精度也随之降低此外,还利用有限元的方法对弹性铰链的刚度和运动精度进行了校验
弹性铰链, 静态刚度, 运动精度, 应力集中系数
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122浏览
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张大卫, 田延岭, 闫兵
机械设计,2003,20(11):36~39,-0001,():
-1年11月30日
为补偿精密磨床砂轮的振动对加工精度的影响,设计了一台作为磨床辅助进培装置的徽进给工件平台。谊工作平台采用压电陶瓷作为驱动机构,弹性链链作为预紧机构。为了避免压电陶瓷驱动器受到事矩的作用.在压电陶瓷驱动器的顶部和动平台之间加了一个球形接头。利用弹性铰链的顸紧力.实现驱动嚣和动平台之间的赫兹接触。高精度的电容式位移传感器用来测量动平台的实际输出并形成反馈控制系统。为了消除压电陶瓷的迟、蠕变等非线,采用了非线性PID控制算法柬实现微进绔平台的实时控制。采用跟踪徽分器对信号进行跟踪井得到其微分信号,提高了控制系统的鲁棒性。通过计算机仿真了所设计的微进给平台的特性和闭环控制算法的有效性。
微进培平台, 弹性铰链, 压电陶瓷, 非线性PIE
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张大卫, 田延联, 王杏华, 高咏生
,-0001,():
-1年11月30日
研制了一种基于高刚度PZT作动器的超精密定位工作台,其特点是采用弹性铰链预紧和提供工作台侧向刚度,结构简单。动态响应速度快,分辨率高,为防止PZT作动器受到过大弯力作用和动平台弯曲变形,在动平台与PZT作动器间加入弹性缓冲环节和辅助性隔离板,另外,对工作台输入输出特性、静动态刚度和模态振刚、以及受外力作用时产生的静态位移误码差进行了试验研究。试验数据表明,该工作台可作为精密磨床的辅助工作台,极大地提高机床的定位精度。PZT作动器; 精密定位工作台; 动态特性
piezodectric translator, precision positioning work table, dynamic character
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引用
张大卫, A.-P. Xu a, ∗, Y.-X. Qu a, D.-W. Zhang b, T. Huang b
International Journal of Machine Tools & Manufacture 43 (2003) 283-292,-0001,():
-1年11月30日
In this paper, a new type of model for the end milling process is presented considering cutter flexibility, which includes not only the static but also the dynamic deflection of the cutter. According to the basic assumption for a linear elastic body, the force acting on the cutter and its deflection in the milling process are both divided into two parts: the static and the dynamic. By considering the regenerative feedback in the practical milling process, the dynamic milling force acting on a unit length of the cutter is derived. Furthermore, a new kind of dynamic deflection model of the cutter is established. Based on this model, a new set of efficient numerical simulation algorithms are presented. In the mean time, the static deflection of the cutter is also formulated. Finally, the simulation and measurement of the milled surface topography for the end milling process show the feasibility of this model.
End milling, Physical simulation, Cutter flexibility, Surface topography
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57浏览
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张大卫, Y. Gao, S. Tse, D. Zhang, X. Xu
Journal of Material Processing Technology 129 (2002): 485-489,-0001,():
-1年11月30日
In order to achieve active control for improved machining accuracy and efficiency, the control commands will include a substantial amount of high frequency signals. The high frequency command signals may not be sufficiently implemented by the single actuating unit that is the wheel infeed system. To solve this problem, an additional actuating unit will be required to support the workpiece in order to implement small but fast control actions. A high performance workpiece micro-positioning table utilizing a piezoelectric translator under preloaded Hertzian contact has been developed and experimentally tested. The table has shown to have a high resolution of better than 20 nm and a high natural frequency of approximately 579.2 Hz. When implementing a 43.587 ~tm step motion, the acceleration could be up to 33.5 l g, where g is acceleration due to gravity. It is found that when large step commands are applied, the workpiece table would exhibit excessive overshoot due to the separation between the piezoelectric translator and the moving part of the table. This would cause large shock accelerations, seriously affecting the machining accuracy. Dynamic models have been established to describe the table-top motions and the occurrence of the separation, which should be significant due to the wide use of the design of preloaded Hertzian contact. The models have not been examined systematically using an experimental approach. The micro positioning table is briefly introduced and the velocity and acceleration models of the table are presented. Experimental results are analyzed to verify the established models and to validate the findings about the separation. The average modeling error was found to be less than 3 %. This gives confidence in using the system for the fast active control required in high speed machining processes.
Workpiece micro-positioning table, Hertz contact, High performance machining control
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张大卫, 阎兵, 徐安平, 黄田, 曾子平
机械工程学报,2002,38(5):22~26,-0001,():
-1年11月30日
建立了考虑刀杆柔性的球头铣刀铣削振动模型,探讨了交变轴向力对刀杆固有频率的影响。考虑刀具动态变形和工件表面波纹对切削厚度的再生反馈,建立了球头刀铣削动力学模型,对铣削中的动态铣削力和刀杆振动进行了仿真,证明了离线仿真可以对铣削过程动特性做出预测。
球头铣刀 振动 动态铣削过程再生性颤振
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张大卫, 阎兵, 徐安平, 黄田, 曾子平
中国机械工程,2002,13(2):160~163,-0001,():
-1年11月30日
为提高铣削加工的安全性和生产效率,有必要在加工实际进行之前准确地预测切削过程的物理信息,如铣削力、刀具振动等。给出了球头铣刀刃线几何模型,采用理论切削力分析与实验—系数识别相结合的方法建立了新的螺旋刃球头铣刀的铣削力模型。对不同切削条件下的铣削力进行了仿真,与实验测量数据吻合良好,证明离线仿真可以对铣削力做出较准确的预测。
球头铣刀, 铣削力, 建模, 仿真
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【期刊论文】Dynamic modeling of a novel workpiece table for active surface grinding control
张大卫, Yongsheng Gao *, Dawei Zhang, Chi Wai Yu
International Journal of Machine Tools & Manufacture 41 (2001) 609-624,-0001,():
-1年11月30日
In order to implement active control during surface grinding, a workpiece micro-positioning table utilizing a piezoelectric translator has been developed. The workpiece table has a working area of 100´100 mm and a nominal working range of 45 mm. The resolution of the workpiece table is less than 20 nm and the natural frequency is 579.2 Hz. The rigidity of the workpiece table under the open loop condition is approximately 17 N/mm. Under the closed loop condition, the rigidity is better than 400 N/mm. The design of the workpiece table is presented together with considerations to achieve the high dynamic characteristics, where the maximum acceleration is up to 33g (g is the acceleration of gravity). The dynamic models of the piezoelectric translator and the workpiece table have been established. Experimental testing has been carried out, verifying the performance of the workpiece table and the established dynamic models for the workpiece micro-positioning table. Ó 2001 Elsevier Science Ltd. All rights reserved.
Dynamic modeling, Active control, Grinding, Workpiece micro-positioning table
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【期刊论文】DYNAMICS OF A HIGH PERFORMANCE WORKPIECE TABLE FOR ACTIVE CONTROL DURING PRECISION GRINDING
张大卫, Y. Gao*, D. Zhang, and C. W. Yu
,-0001,():
-1年11月30日
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23浏览
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【期刊论文】Detachment modeling of a novel workpiece micro-positioning table under preloaded hertz contact
张大卫, Yongsheng Gao*, Dawei Zhang, Chi Wai Yu, Zhiyong Yang, Shuet Fung Tse
Journal of the International Societies for Precision Engineering and Nanotechnology 26 (2002) 83-92,-0001,():
-1年11月30日
A micro-positioning table for precision machining applications is developed utilizing a piezoelectric translator to generate high speed precision motions with accelerations up to 33.51 g. The piezoelectric translator is preloaded by four springs such that the moving part in the table keeps contact with the translator. The contact between the translator and the moving part is of the hertz contact type. It is a typical design for high performance micro-positioning devices. It is found that the hertz contact may not be maintained and detachment occurs when implementing large step motions. The detachment phenomenon is analyzed and the models to determine the separation time and the maximum overshoot are established. It is found that the stiffness of the preloading springs and the distance of compression for preloading are the key parameters of the detachment. A pseudo-step command signal design is proposed to use as a solution in order to conveniently reduce the overshoot without compromising the settling time. Experimental tests have been carried out, verifying the established models for the micro-positioning device.
Detachment, Workpiece micro-positioning table, Hertz contact, Grinding control
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