2002年中国向东南亚出口金属加工机床去向及份额

出口去向金属加工机床合计合计中:金属切削机床合计川户:金属成刀多机床金额(千美元)与卜年同期比较(%)所点{味月份御}戈7‘) 金额(千美元)与上年同期比较(%)所占出口份额(%) 金额(千美元)与上年同期比较(%)所占出口份额(%)43913275.4016,63合计6620782,7421 1222293一131.9944 .90963258.403 .659 1 10301218.35香港1874343 .27598933734 313 54印度尼西亚全202724 .143 .842690一1 .655 .42马来西亚873322 .232.79533213.812 .02340138 .256 .85485940 .561 .843838一45 .087 73越南8697一16722 .7760284 1 .942 .28缅甸68641 .552 19836…     

改进灰狼算法优化灰色预测模型在数控机床中的应用

针对传统灰色预测模型因背景值选取带来的预测误差较大的问题,提出一种与改进灰狼算法相结合的故障预测模型.设计一种改进的灰狼算法,对基本灰狼算法的算法参数通过非线性策略进行改善,并用于优化灰色预测模型中的背景值,从而获得最优预测模型.以某一型号数控车床主轴的8个故障数据为例,将该预测模型与其他灰色改进预测模型进行对比验证,...     

The development of embedded device to detect chatter vibration in machine tools and CNC-based autonomous compensation

The chatter vibration stands for a sudden relative vibration appeared between a material and a tool while processing with a machine. This vibration is a factor that seriously affects the quality of processed materials as well as being a factor which causes serious damages to the tool and the machine. This study is related to the detection and compensation of chatter vibration that can compensate chatter vibration faster and produce processed goods with more precision by autonomous compensation. The above-mentioned chatter vibration compensator includes the chatter vibration sensor and the chatter compensator that estimates the compensation value according to the sensor detecting the chatter vibration of machine tool and the chatter vibration detected from the sensor while having a feature of being organized by interlocking with the machine tool controller.     

Evaluation of machinability according to the changes in machine tools and cooling lubrication environments and optimization of cutting conditions using Taguchi method

This study analyze the effect of machine tools, cooling lubrication environments and cutting conditions on surface roughness and cutting force, and propose the combination of cutting conditions which minimizes the effect of machine tool variables on the dispersion of cutting force and surface roughness by treating the changes in machine tool itself and the installation environments as a noise factors. To do so, the Taguchi method is used to establish an experiment plan, and flat end milling is carried out to measure cutting force and surface roughness. The research results show that in the case of cutting force, the effect of cutting conditions is dominant, and changes in machine tools and cooling lubrication environments barely have effect on cutting force. However, in the case of surface roughness, all of the cutting conditions, machine tool and cooling lubrication environment variables have impact. In order to select a combination of cutting conditions insensible to changes in machine tools, considerations for feed per revolution and axial depth of cut turn out most important in the aspect of cutting force, and considerations for feed per revolution is most important in the surface roughness.     

A review of recent developments in the design of special-purpose machine tools with a view to identification of solutions for portable in situ machining systems

With the ever increasing diversity of manufacturing and maintenance needs for modern products, the realm of machine tool design has expanded considerably in recent years. While machine tools for producing singular parts are widely documented, there is much less information available about machine tools for specialist tasks such as repair and maintenance. The paper aims to give an overview of the developments in the field of specialist machine tools and machining systems with a particular emphasis on maintenance operations and in situ machining. The difficulties of performing maintenance on large-scale systems are outlined along with the potential benefits of in situ machining in these applications. A number of examples of specialist machines for applications in various fields are described. The developing area of micro machine tools and micro factories is introduced along with examples of systems which have been developed or proposed. The possible advantages and draw-backs of the various technologies described are discussed. The paper goes on to comment on the potential for a new approach which combines these technologies to produce small in situ machine tools for performing macro-scale machining operations on large workpieces. These machining systems could offer increased versatility of in situ maintenance machining, compared to machines designed for a single repair operation, while reducing costs and environmental impacts.