检索结果-南通市图书馆

Fully Integrated Machine Control for Ultra Precision Machining

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mechanics Engineering and Automation 2013年第8期3卷 465-472页

作者： christian brecher Dominik Lindemann Manfred Zavelberg Department Production Machines Fraunhofer Institute for Production Technology IPT

To meet the demands for highly advanced components with ultra precise contour accuracy and optical surface quality arising in the fields of photonics and optics, automotive, medical applications and biotechnology, consumer electronics and renewable energy, more advanced production machines and processes have to be developed. As the complexity of machine tools rises steadily, the automation of manufacture increases rapidly, processes become more integrated and cycle times have to be reduced significantly, challenges of engineering efficient machine tools with respect to these demands expand every day. Especially the manufacture of freeform geometries with non-continuous and asymmetric surfaces requires advanced diamond machining strategies involving highly dynamic axes movements with a high bandwidth and position accuracy. Ultra precision lathes additionally equipped with Slow Tool and Fast Tool systems can be regarded as state-of-the-art machines achieving the objectives of high quality optical components. The mechanical design of such ultra precision machine tools as well as the mechanical integration of additional highly dynamic axes are very well understood today. In contrast to that, neither advanced control strategies for ultra precision machining nor the control integration of additional Fast Tool systems have been sufficiently developed yet. Considering a complex machine setup as a mechatronic system, it becomes obvious that enhancements to further increase the achievable form accuracy and surface quality and at the same time decrease cycle times and error sensitivity can only be accomplished by innovative, integrated control systems. At the Fraunhofer Institute for Production Technology IPT a novel, fully integrated control approach has been developed to overcome the drawbacks of state-of-the-art machine controls for ultra precision processes. Current control systems are often realized as decentralized solutions consisting of various computational hardware c

关键词： Ultra precision machining fully integrated control highly dynamic axes FPGA EtherCAT.

Thermal Behavior of Externally Driven Spindle: Experimental Study and Modelling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering（科研） 2015年第2期7卷 73-92页

作者： christian brecher Yair Shneor Stephan Neus Kolja Bakarinow Marcel Fey RWTH Aachen University Laboratory for Machine Tools and Production Engineering Chair of Machine Tools Aachen Germany CAMT Center for Advanced Manufacturing Technologies Rotem Industries Rotem Industrial Park Mishor Yamin D.N. Arava Israel

This paper focuses on model development for computer analysis of the thermal behavior of an externally driven spindle. The aim of the developed model is to enable efficient quantitative estimation of the thermal characteristics of the main spindle unit in an early stage of the development process. The presented work includes an experimental validation of the simulation model using a custom-built test rig. Specifically, the effects of the heat generated in the bearings and the heat flux from the bearing to the adjacent spindle system elements are investigated. Simulation and experimental results are compared and demonstrate good accordance. The proposed model is a useful, efficient and validated tool for quantitative simulation of thermal behavior of a main spindle system.

关键词： Machine Tool Thermal Behavior Heat Transfer Spindle Modelling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

有针对性地优化和改善机床性能

现代制造 2017年第32期 28-30页

作者： christian brecher

在对机床的静态和动态性能作出评判的同时，可以向机床制造厂家提供有针对性的支持，以实现设备潜能的最大发挥。

关键词：机床性能优化动态性能制造厂家

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

对刀具接口弯曲性能的分析

现代制造 2016年第18期 36-36,38-40页

作者： christian brecher

作为机床和刀具之间的直接连接环节，刃具接口会直接影响加工流程的效率与质量。形成加工力所需的传动力矩，可以通过刀具接口被传递到切削流程中去。由于存在生成的弯曲力矩和扭矩的影响，对接口系统具有很高的机械刚性要求。

关键词：接口系统弯曲性能刀具加工流程传动力矩弯曲力矩连接环加工力

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

在实施的另一边

现代制造 2006年第17期 34-37页

作者： christian brecher christian Wenzel Andere

超精密加工的监控方案保证了工艺的稳定性以及工件的表面质量和精度。

关键词：超精密加工表面质量监控方案稳定性

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

大型部件的精密加工

现代制造 2017年第18期 68-70页

作者： christian brecher Robert Schmitt

针对大型部件加工的公差范围在低位变动时，达到几个微米。精密加工可以提高诸如涡轮机、船舶和飞机等方面的制造效益，因此也成为发达国家的生产驱动力。对加工精度产生影响的一个主要影响因素便是机床设备和部件的不断变化着的热塑性... 详细信息

针对大型部件加工的公差范围在低位变动时，达到几个微米。精密加工可以提高诸如涡轮机、船舶和飞机等方面的制造效益，因此也成为发达国家的生产驱动力。对加工精度产生影响的一个主要影响因素便是机床设备和部件的不断变化着的热塑性状态。各种不同的内外部热源及其下降都会对机床设备和部件的结构产生影响，例如在加工车间里因新部件送抵而开启车间大门，从而导致机床和部件的温度突降，如果说此类干扰源还可以被规划并可以相当容易地被克服的活，那么诸如加工废热和冷却润滑剂对机床设备和部件外形的影响刚更加复杂。

关键词：大型部件精密加工机床设备加工车间冷却润滑剂公差范围发达国家塑性状态