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HIGH SPEED MILLING OF GRAPHITE ELECTRODE WITH ENDMILL OF SMALL DIAMETER

Chinese Journal of Mechanical Engineering 2007年第4期20卷 27-31页

作者： WANG Chengyong ZHOU Li FU Hao hu zhouling Faculty of Electromechanical Engineering Guangdong University of Technology Guangzhou 510090 China Faculty of Mechanical and Electrical Engineering Guangdong Polytechnic Normal University Guangzhou 510665 China Faculty of Electromechanical Engineenng Guangdong University of Technology Guangzhou 510090 China Guangdong Mechanical and Electrical Collage Guangzhou 510515 China

Graphite becomes the prevailing electrode material in electrical discharging machining （EDM）*** cutting experiments are carried out to study the characteristics of graphite chip formation *** speed milling experiments are conducted to study tool wear and cutting *** results show that depth of cut has great influence on graphite chip *** removal process of graphite in high speed milling is the mutual result of cutting and grinding process. Graphite is prone to cause severe abrasion wear to coated carbide endmills due to its high abrasiveness *** major patterns of tool wear are flank wear,rake wear,micro-chipping and breakage. Cutting forces can be reduced by adoption of higher cutting speed,moderate feed per tooth,smaller radial and axial depths of cut,and up cutting.

关键词： High speed milling Graphite electrode Tool wear Cutting force

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基于高斯两步移动搜寻法的村镇避难场所可达性研究

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地球信息科学学报 2018年第10期20卷 1412-1421页

作者：但文羽肖映辉胡周灵詹庆明武汉大学城市设计学院武汉430072 武汉大学数字城市研究中心武汉430072

避难场所可达性是指避难场所与受灾居民之间的通达性,即灾害发生时,避难人员通过避难疏散通道到达避难场所的难易程度,是评价避难场所布局合理性的重要指标。本研究结合高斯两步移动搜寻法和网络分析法,从供需双向出发对村镇地区避难场... 详细信息

避难场所可达性是指避难场所与受灾居民之间的通达性,即灾害发生时,避难人员通过避难疏散通道到达避难场所的难易程度,是评价避难场所布局合理性的重要指标。本研究结合高斯两步移动搜寻法和网络分析法,从供需双向出发对村镇地区避难场所进行可达性分析。2种方法的结合,既充分考虑了需求点与设施点的相互作用,又充分考虑了设施点的吸引力随距离的衰减关系,并基于实际道路,以步行疏散时间作为搜索半径,降低了传统研究中因忽略供需间相互作用及实际距离而引起的可达性结果的误差。最后,以神农架松柏镇区为例,验证该方法的实际应用价值。结果表明,该方法能够有效测定村镇地区避难场所的空间可达性,同时,基于GIS软件可以直观地揭示研究区域内避难场所可达性空间分布差异。该方法可为制定科学的村镇防灾减灾规划提供方法支持。

关键词：高斯两步移动搜寻法村镇防灾避难场所可达性 GIS

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HIGH-SPEED MILLING OF GRAPHITE ELECTRODE WITH SMALL DIAMETER ENDMILL

HIGH-SPEED MILLING OF GRAPHITE ELECTRODE WITH SMALL DIAMETER...

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第七届海内外青年设计与制造科学会议

作者： Wang Chengyong Zhou Li Fu Hao and hu zhouling Faculty of Mechanical Engineering Guangdong University of Technology China Guangdong Mechanical & Electrical Collage Guangzhou China

＜正＞Graphite becomes the prevailing electrode material in EDM currently. High-speed milling with small diameter endmill is the major process method to manufacture electrode with difficult-to-cut structure such as thin wall or micro holes. Severe tool wear and corner breakage are two difficulties in high-speed milling of thin-walled graphite electrode. In this paper, HSM experiments have been carried out to study the chip formation mechanism of graphite, tool wear and cutting forces. The results show that many characteristics of graphite cutting process with small diameter endmill are found different from high-speed milling of graphite with large diameter endmill and metal cutting.

关键词： High-speed milling Graphite electrode Cutting force Tool wear

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换能器布阵型式对超声清洗效果影响的研究

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机械制造 2020年第10期58卷 38-41页

作者：胡涛傅波魏周玲晋毅戴素红四川大学机械工程学院成都610065 北京泰拓精密清洗设备有限公司北京101102

针对多个同频率换能器应用于超声清洗设备中的需求,研究了三角形、矩形、正方形共三种换能器布阵型式对超声清洗效果的影响。应用ANSYS有限元分析软件,对不同换能器布阵型式下的板声源特性进行结构动力学分析,确认换能器三角形布阵型式... 详细信息

针对多个同频率换能器应用于超声清洗设备中的需求,研究了三角形、矩形、正方形共三种换能器布阵型式对超声清洗效果的影响。应用ANSYS有限元分析软件,对不同换能器布阵型式下的板声源特性进行结构动力学分析,确认换能器三角形布阵型式具有较大的振幅,并且振幅分布最为均匀。利用MATLAB软件对换能器三角形布阵型式的清洗槽声场分布进行数值分析,确认清洗具有可行性。通过浸泡式超声网板清洗试验,验证了换能器三角形布阵型式的清洗效果,建议超声清洗设备优先采用换能器三角形布阵型式。

关键词：换能器超声波清洗布置研究

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