欢迎订阅、欢迎赐稿Frontiers of Mechanical Engineering(机械工程前沿)，SCI检索

正(ISSN 2095-0233,CN 11-5984/TH;邮发代号:80-975)主编:杨叔子,郭东明执行主编:顾佩华(加拿大)副主编:蒋庄德,谭建荣,史铁林,陈义明学术顾问:李德群,李培根,柳百成,卢秉恒,闻邦椿,赵淳生编委:Marco Ceccarelli(意大利),陈大融,陈学东,陈雪峰,褚福磊,戴建生(英国),范大鹏,管在林,黄田,姜澜,李涤尘,李卫华(澳大利亚),林建忠,林于一(美国),林忠钦,刘桂雄,刘辛军,彭志科,David W. Rosen(美国),钱林茂,裘进浩,孙洪波,涂善东,王海斗,王华明,王军(澳大利亚),王树新,王煜,谢存禧,徐小力,颜鸿森,杨华勇,姚燕安,尹周平,尤政,于德介,于靖军,余跃庆,翟贵生(日本),翟婉明,张海霞,张建辉,张农(澳大利亚),张显程,张宪民,赵力东(德国),赵万生,朱旻昊,Teresa Zielinska(波兰),邹慧君。     

全国闲置设备调剂信息

1.立式车床,C5225,齐哈/70,1台,7成,23万元 2.立式车床,C5116,齐哈/85,1台,8成,15万元 3.立式车床,C5110,齐哈/55,1台,6成,5万元 4.立式车床,CQ5250,武汉/92,1台,9成,65万元 5.轧辊车床,C84100,天津/82,1台,8成,20万元 6.车床,C61200×10000,青海/78,1台,9成,65万元 7.车床,C61125×5000,沈阳/65,1台,7成,14万元 8.卧镗,T611,北三/74,1台,7成,8万元 9.卧镗,T618,中捷/84,1台,8成,11万元 10.卧镗,T617,瓦房店/75,1台,7成,5.5万元 11.深孔镗,T2120,德州/88,1台,8成,17.5万元 12.压力机,J36-630,济南/85,1台,9成,80万元 13.压力机,J36-800B,济南/86,1台,9成,200万元 14.压力机,J36-160,济南/60,1台,6成,12万元     

二手设备

1 Ｃ616Ａ＿1车床 ,济一 ,1983年 ,8成 ,1 8万元 ,3台。2 Ｃ616车床 ,济一 ,1981年 ,7成 ,1 4万元 ,2台。3 Ｃ3 60Ｋ车床 ,沈阳 ,1980年 ,8成 ,1 8万元 ,1台。4 Ｔ62 16落地镗 ,武重 ,1977年 ,8成 ,78万元 ,1台。5 ＭＭ713 2Ｘ160 0平磨 ,杭州 ,1981年 ,8成 ,面议 ,1台。6 Ｍ13 5Ｘ2 0 0 0外圆磨 ,上海 ,1965年 ,7成 ,面议 ,1台。7 Ｘ5 2 Ｘ63 Ｘ5 3立铣 ,北京 ,1983 82 91,8成 ,面议 ,1台。8 ＹＴ5 12 0插齿机 ,天津 ,1998年 ,未用 ,面议 ,1台。9 1.3 2ｍ立车 ,苏联 ,1975年 ,7成 ,8 8万元 ,1台。10 Ｍ713 0平面磨 ,哈尔滨 ,1979年…     

长光三十周年颂词

日出东方,回忆长光,祖国东北,初露曙光,从幼到大,藉之增光,继而上升,步步进展,人才辈出,成为太阳。终成巨匠。成果累累。来日方长,新陈代谢,发扬光大,携起手来,后生可畏,自然规律,世世相继,共搞四化,青出于蓝,随着潮流,余也不才,披荆靳棘,终胜于蓝。再接再厉.登门求助。甘当勇士。长光三十周年颂词@龚祖同~~     

INVESTIGATION ON THE APPLICATION OF THE BOUNDARY ELEMENT METHOD TO THE SPILL GROOVED THRUST BEARING

Aj--AreaOfthedomainqb~widthinthedirectionoftheradius,b=rZ~rlC,D--TwOpointSinthedomainDZC',D'~pointsonthe~fF(F)~~~~,F=po~atl,.~~ofthejib~elementM~~~onthe~CMf(Mf)~FrictiohaltO~,Mf=p,cob#WS,n--~~dthe~allorQnc,un~iedoncosinesofntothejibboUndaryelementNi--Shapefunctionon"theiP(P)~~oftheoartri,P=hoedzp/atPI,Pc,Pc,P#,pc--DessureonthehaUndariesFI,fi,fi,fiaamfiofalandI,?pl,pz--PressureonthebodriesacandacOfagroove~*P(c,D)--FUndamentalsolutionofthePoison's~ionPIn--bass~OftheOilinputP-…     

闲置设备调剂信息

1.六轴自动车床,C2132.6D,84—86年,安少用,5台,10万元/台2.摇臂钻床,φ100,匈/78,安少用1台,22万元3.滚齿机,Y320M15φ2000,上海/75,安少用,1台,36.5万元4.移动式空压机,HPY/8—10/7—K10m~3,浙江/84,少用,1台,5万元5.移动式中压空压机,10m~3 60气压,蚌埠/91,9成,1台,32万元附黄河JN151-01车一辆柴油机6135AZP贵柴一台6.三向翻斗自卸汽车,ΓAC—3511,俄,全新,16台,面议 7.15吨自卸汽车.乌拉尔.俄.全新,15台,面议 8.立式拉床,L720/20吨,长沙/76,9成,1台10万元 9.造型机,Z148B,保定/85,未用,1台,1.5万元 10.固定式热锯,φ1500,沈重/93,安少用,1台,面议11.离心机,S×1000,辽阳/88,安 未用,2台,9万元 12.凸轮磨床,M8325,长春/82,新,1台,5万元 13.滚齿机,Y31125,南京/73,7成,1台,15.5万元 14.曲轴磨床,M8230×1600,山 东/75,7成,1台,2.5万元 15.龙门铣床,X2010C×3000,天 津/76,8成,1台,25万元 16.立式车床,C516A,齐—/74,9成,1台,25万元17.卧式坐标镗床,D1X1-75-OG,瑞士,8成,1台,95万元 18.齿轮磨床,MAAGφ600M12,瑞士,8成,1台,28万元19.精密滚齿机,TM3180HM8,重 庆/83,9成,1台,14万元     

欢迎订阅、欢迎赐稿Frontiers of Mechanical Engineering(机械工程前沿),SCI检索

<正>(ISSN 2095-0233,CN 11-5984/TH;邮发代号:80-975)主编:杨叔子,郭东明执行主编:顾佩华(加拿大)副主编:蒋庄德,谭建荣,史铁林,陈义明学术顾问:李德群,李培根,柳百成,卢秉恒,闻邦椿,赵淳生编委:Marco Ceccarelli(意大利),陈大融,陈学东,陈雪峰,褚福磊,戴建生(英国),范大鹏,管在林,黄田,姜澜,李涤尘,李卫华(澳大利亚),林建忠,林于一(美国),林忠钦,刘桂雄,刘辛军,彭志科     

全国闲置设备调剂信息

l龙门铣,X2016AX16XS,北京刀6,l台,少用,面议2.龙门铣,X2012AX125X4,北京N6,l台,8成,面议3外圆磨,M1380AX4500,无锡y4,l台,8成,面议4.外圆磨,MQ1350AX3op,上海/87,l台,9成,面议5.车床,CQ61I00XM,天津/93,l台,9成,面议6车床,CW6ll25X5000,天水/89,l台,9成,面议7车床,m11mX3m门,上海厂8,1台,少用,128万元8车床,“11mX5m川,上海刀9,1台,8成,12二8万元9龙门铣,X2012AXI.25X4,北京N6,l台,少用,面议10立车,C5ll6,瓦房店/93,l台,新,面议11立车,C5112A,齐一/74,l台,8成,85万元12.螳床,T68,昆明/84,l台,少用,14.5万元13i床,T611,中捷…     

闲置设备调剂信息

11万元/台41.压路机、CA25S,8成,1台,20万元42.汽车吊,加藤NK45t,日/89,8成,亚台,150万元43.汽车吊,加藤NK40t,日乃2,存库,1台,205万元44.汽车吊,加藤NK50t,日/89,8成＊台,180万元45.汽车吊,加藤20t,日/83,7成,1台,38万元46.汽车吊,加藤30t,日/80,7成,1台,65万元47.汽车吊,120t     

产品/生产商

AMADA, D-Haan AVlA, D-G6ppingen AXA, D-Schbppingen BIMATEC - SORAI_UCE, D-Limburg BMM, D-Bim6hlen BRETON, l-Castello di Godego （TV） BREUNING I IRCO, D-Steinenbronn CITIZEN, D-Esslingen CMZ DEUTSCHI,AND, D-Stuttgart DANOBAT, l：-Elgoibar （Gipuzkoa） DARIA, D-V6hringen DMG I MORI SEIKI, D-Hilden DMT DREHMASCHINEN, D-L6rrach DOOSAN INFRACORE, D-Dormagen EB TURNKEY, D-Tuttlingen EMAG, D-Salach ERGOMATo BR-Sao Paulo - SP FAT, PL-Wroclaw     

A Surface Area Calculation and CAPP System for Non-Axisymmetric Deep Drawing Products

In this paper a surface area calculation for non-axisymmetric deep drawing products of elliptical shape was constructed for the design of blank shapes of deep drawing products by using an AutoLISP function in AutoCAD software. A computer-aided process planning (CAPP) system for rotationally symmetric deep drawing products has been developed. In this study, a CAPP system for non-axisymmetric deep drawing products of elliptical shape was constructed using process sequence design. The system developed consists of four modules. The first is the recognition of shape module for recognising non-axisymmetric products. The second is a 3D modelling module for calculating the surface area for non-axisymmetric products. The third is a blank design module for creating an oval-shaped blank with an identical surface area. The fourth is a process planning module based on production rules that play the most important role in an expert system for manufacturing. The production rules are generated and upgraded by interviewing field engineers. The drawing coefficient, the punch and die radii for elliptical shape products are considered as the main design parameters. The suitability of this system was verified by applying it to a real deep drawing product. This surface area calculation and CAPP system should be very useful for reducing the lead-time for manufacturing and for improving the accuracy of products.     

Qualitative criteria for dynamic buckling of imperfection sensitive nonconservative systems

A qualitative dynamic buckling analysis of imperfection-sensitive non-conservative dissipative systems under path-dependent loading in regions of divergence is presented. Despite the lack of potential for this type of loading a total energy-balance equation allows us to establish a sufficient criterion for dynamic buckling, the counterpart of that valid for potential systems. Moreover, using energy and geometrical considerations for the channel of motion, one can obtain for a 2-DOF model dynamic buckling loads (DBLs) which are practically exact for vanishing but non-zero damping and very accurate for non-zero damping. Numerical results show the efficiency and reliability of the proposed qualitative analysis.     

A handheld support system to facilitate stereological measurements and mapping of branching structures

BranchSampler is a system for computer-assisted manual stereology written for handheld devices running Windows CE. The system has been designed specifically to streamline data collection and optimize sampling of tree-like branching structures, with particular aims of reducing user errors, saving time, and saving data in formats suited for further analysis in other software, for example, a spreadsheet. The system can be applied in a wide range of applications, from biomedical science to agriculture and horticulture. It can be applied for sampling nested generations of lung bronchioles and renal arterioles or for collection and optimizing sampling of crops for precision agriculture. Although the system has been designed specifically for sampling branching structures, it is sufficiently flexible to be used for other applications involving nested stereological designs. We describe the system specifications, software and Graphical User Interface development, functionality and application of the handheld system using four examples: (a) sampling monkey lung bronchioles for estimation of diameter and wall thickness (b) sampling rat kidney for estimating number of arteries and arterioles in a specific generation (c) mapping fruit (apple) tree yield in an orchard and (d) estimating the total leaf surface area of chrysanthemum plants in a greenhouse.     

Approximate Formula for the Contact between Truncated Surfaces and Frictional Characteristics of a Journal Bearing in Mixed Lubrication

This paper presents an approximate formula for the contact of a non‐Gaussian distribution of truncated surfaces, which is useful for mixed lubrication theory, and gives a method for the determination of the truncation parameters in this formula from a measured roughness profile. Using this approximate formula for a contact, the approximate formula for the friction coefficient of a journal bearing in mixed lubrication, which was previously proposed by the authors, is modified for truncated surfaces, and the frictional characteristics are demonstrated for various parameters of truncated roughness using the modified formula.     

固相微萃取和气相色谱-质谱法测定北京酱牛肉中的挥发性成分

采用顶空固相微萃取和气相色谱-质谱法（Head Space Solid Phase Microextraction Gas Chromatgraphy-Mass Spectrometry,HSSPME—GC—MS）对北京传统酱牛肉中的挥发性香气物质进行了测定,总共检测出68种风味化合物,其中包括醛类49.12%、酮类0.84%、醇类4.85%、烃类13.29%、酯类2.61%、酚醚类11.33%和含硫含氮及杂环化合物6.55%,另外还有11.41%的其它类物质,其中醛、酮和含硫含氮及杂环化合物中含有北京传统酱牛肉的主要香味成分。     

汽车发动机系滚动轴承润滑脂动态可靠性测试及评价

介绍了汽车发动机系滚动轴承润滑脂动态可靠性的测试及评价方法,包括SKF Emcor润滑脂动态抗腐蚀测试,FAG FE8润滑脂动态抗极压和磨损性能测试以及FAG FE9润滑脂动态润滑寿命测试,对正确选用润滑脂以及汽车发动机系滚动轴承可靠度设计等提供参考.     

影响凸轮检测精度的问题与对策

针对目前国内在发动机凸轮检测中 ,选择检测基准、确定检测位置、测头切换、最小判别等方面存在的带有普遍性的影响凸轮检测准确性的问题进行了分析 ,并参照 GB/T1 1 82 -1 996和 GB/T1 6671 - 1 996,以“最小条件”为依据 ,从发动机凸轮升程和转角是非线性函数关系入手 ,对选择凸轮检测基准原则、确定凸轮检测位置 (求解检测起始转角 )方法、凸轮升程检测数据的处理、凸轮升程合格性的判定等进行了论述     

Pseudo-vibration sensitivities for commercial laser vibrometers

Pseudo-vibration sensitivities in laser vibrometry are the consequence of measurement noise generated by surface motions other than that on-axis with the incident laser beam(s), such as transverse and tilt vibrations or rotation. Concentrating solely on commercial laser vibrometers to maximise value to the vibrometer user, this paper quantifies pseudo-vibration sensitivities for five single beam instruments (for translational vibration measurement) and two parallel beam instruments (for angular vibration measurement) across a range of surface treatments and roughnesses. Transverse, tilt and rotation sensitivities are quantified for the single beam instruments. In-plane rotation, rotation and tilt sensitivities are quantified for the parallel beam instruments. Estimates of sensitivities for parallel beam instruments based on related quantifications for single beam instruments are shown to offer order-of-magnitude agreement. Further confirmation is provided of the benefits of smaller laser beams for measurements on tilting or rotating surfaces and of larger beams for measurements on surfaces with transverse motion. For rotor vibration applications, lower sensitivities are found for a focus location on the shaft rotation axis rather than its surface. Based on experimental evidence, refinements to the test methods are suggested with a view towards the formation of a Standard. These comprise placing limits on surface flatness and rotor out-of-roundness, inclusion of agreed ranges for target displacement amplitude and rotor diameter, and acknowledgement of the importance of focus location for rotation sensitivities.     

螺旋锥齿轮珩磨轮的制造方法

对用于螺旋锥齿轮珩磨加工的珩磨轮模具制造的关键技术进行深入研究。介绍珩磨轮齿面准均布网格点的计算方法,通过计算这些准均布网格点及其径矢和法矢,建立齿面上每一个网格点的拨模极限导程的数学模型。通过计算齿面上这些网格点的可行的螺旋线导程,判断其交集是否为空集,并以此作为判断是否出现拨模干涉的依据。针对已经出现的拨模干涉,提出拨模导程的优化方法以及干涉的修正方案和齿面光顺过程。详细讨论金属模具的逐点成形和展成加工方法以及它们各自的适用范围和可加工性,并以刀倾法为例,阐述加工螺旋锥齿轮珩磨轮的金属凸模的计算步骤,为螺旋锥齿轮珩磨轮的制造提供理论依据。     

A procedure for making phosphor viewing screens for the transmission electron microscope

A technique is described for preparing uniform, durable phosphor layers for viewing screens suitable for the transmission electron microscope; a settling procedure is used. The example described here is for a high-voltage instrument, but with adjustment of the coating density, the technique should be equally suitable for screen preparation for transmission electron microscopes that operate at lower acceleration voltages.