汽车前轮轮胎异常磨损问题的探讨

目前一些国产汽车都存在着不同程度的前轮轮胎异常磨损，产生前轮异常磨损的原因是多方面的，本文主要从汽车结构和性能参数对轮胎磨损的影响进行探讨，对解决汽车前轮异常磨损现具有一定的参考价值。     

模具材料的高温滑动冲击磨损过程的电镜观察

在模拟热作模具热磨损试验机上进行高温滑动冲击磨损试验,在各磨损阶段,用扫描电镜对模具试样表面形貌作细致观察,得出如下结论:高温滑动冲击磨损过程的主导磨损机制,早期为磨粒磨损,中期及后期逐步向点状剥落及大块疲劳剥落转移。全部过程都有粘着磨损,后期更为严重。     

轮胎磨损指示装置专利技术综述

轮胎磨损指示装置作为配设于轮胎上较为新兴的部件,能够有效的提醒驾驶者轮胎的使用寿命,可以极大的降低事故的发生率。本文对轮胎磨损指示装置领域的专利申请进行了分析,重点针对了视觉辨识和磨损感应的技术分支进行了详细分解,并对以后的发展趋势作了展望。     

T10钢脉动冲击磨损规律的试验研究

对T10钢进行了脉动冲击磨损试验及滑动磨损试验,对其脉动冲击磨损机理进行了探讨,分析了T10钢脉动冲击载荷下的磨损规律及其与45钢磨损的不同之处,指出T10钢脉动冲击载荷下的磨损规律受硬度和载荷的交叉影响,磨损机理不同于一般的滑动磨损,主要有切屑犁沟、疲劳剥落等,这几种磨损形式的存在与硬度、载荷有关.     

检测工具金属头磨损和剥落的设备

日本研制出一种检测切割工具金属包头磨损和剥落的设备。在要检测磨损的部分镀上一层铌酸锂薄膜，这种有压电性质的铌酸锂薄膜，可以根据轻微的振动来估计金属包头的磨损情况，并决定何时更换。即使薄膜轻微偏离磨损部分，振动也可以被测到。实验中发现，磨损面积的大小与振动产生的电压成正比。因此，在研磨过程中磨损的产生和面积大小可以被准确检测到。由铌酸锂薄膜检测到的磨损面积极限值为３０微米。使用这种新研制的设备保证了在工具到达工作寿命之前不必停机，避免了因为担心会影响工件质量而设置的自动停机。（）检测工具金属头磨损…     

轮胎磨损程度对在用车排放特性的影响研究

采用VMAS排放检测系统作为实验平台,在同一辆实验车上换装不同磨损程度的轮胎进行排放检测。实验结果表明,随着在用车使用的时间增长,轮胎的磨损程度也随之增大,轮胎磨损后导致了轮胎与路面间摩擦力的显著降低,影响到车辆的动力性、经济性和牵引性能,对汽车的排放有直接的影响,特别是在变工况下影响尤为明显。通过实验,找出了轮胎磨损程度与汽车排放特性之间的关系,为控制在用车排放污染物提供了实验依据。     

切削速度对精车AISIH13淬硬钢切削行为的影响

为了探究淬硬钢的切削加工性能,采用YW2A细晶硬质合金刀具精车淬硬AISIH13钢,光学照相仪、测力仪（YDC-Ⅲ89B）、工具显微镜(XGJ-1) 、扫描电镜(JSM5800LV)及便携式粗糙度仪（TR100）用于试验检测,分析了切削速度对切屑形成、切削力、刀具磨损及零件表面粗糙度的影响规律。结果表明,随着切削速度增大,切屑由连续性带状向C型节段演变,切削力、刀具后刀面磨损及工件表面粗糙度值均呈减小趋势;在试验切削速度范围内,前刀面以粘结磨损和氧化、扩散磨损为主,切削温度是主因,而后刀面以疲劳剥落为主,机械应力起主导影响。     

轮胎的结构性能与合理使用浅析

对车辆的行走系统来讲，轮胎是关键，它是支承车辆又是唯一与路面直接接触的部件。在行驶过程中，容易引起轮胎的磨损、车辆打滑，滚动阻力大，产生热量大，易出故障。本从轮胎的结构形式、受力变化与性能等方面进行分析，提出了轮胎的正确保养与合理使用的建议。     

三轮摩托车差速传动系统设计

分析了三轮摩托车在行驶过程中由于左右车轮在同一时间内滚过的行程不相等而引起驱动轮产生滑转或滑移,使轮胎过早磨损的现象。研究了在正三轮摩托车的驱动桥中用差速器将其左右轮隔开,使车轮在行驶条件不一致的情况下减少磨损的改进设计     

轮胎磨损分析中接地能量损失的有限元计算模型研究

轮胎滚动接地能量分析，对研究其滚动磨损具有重要意义。通过对轮胎接地运动和接地受力分析，建立用于轮胎有限元分析的接地能量损失模型，并据经模型对9．00R20轮胎接地能量损失进行计算，其结果与已有的模型计算结果具有良好的一致性。     

基于铁谱分析系统的机床健康检测

对某机床厂的龙门导轨磨床MMA52160A利用铁谱分析技术的油样进行定期检测,及时地掌握龙门导轨磨床的磨损状况.通过实验与分析发现,在检测时间段内导轨磨床内部存在着正常磨损、切削磨损、滚滑复合磨损磨粒以及铁的氧化物,在数量上以正常磨损居多,其它类型磨粒数量较少,可以判断导轨磨床仍处于正常运行状态.实验表明,铁谱分析技术可以对机床的运行状态进行预报故障;同时,可合理地确定机床的换油周期,节省油料,做到科学润滑,以延长龙门导轨磨床的使用寿命.     

GCr15钢中的残余奥氏体对干滑动磨损行为的影响

研究了残余奥氏体含量对ＧＣｒ１５钢干滑动磨损行为的影响，通过热处理获得ＧＣｒ１５钢不同的残余奥氏体含量，在室温下进行了磨损试验，试验结果表明，在低载荷下，残余奥氏体含量对耐磨性没有影响，一定载荷范围内，随着残余奥氏体含量增加，耐磨性下降；现款是一步增加载荷，随着残余奥氏体含量增加，耐磨性反而增强，硬度与耐磨性之间没有确定的比例关系。     

新型压裂泵阀材料的耐磨损性能研究

通过对多种材料在不同试验条件下耐冲击磨料磨损性能的初步研究,优选出20CrMnTi材料开展了在冲击磨损,滑动磨料磨损和冲击磨料磨损条件下的进一步试验,分析了在各磨损与变形条件下的特点,对所观察到的现象与机理进行了讨论,得出了一些有益结论。研究表明,20CrMnTi材料经渗碳＋淬火＋低温回火处理后,具有较好的抗冲击磨料磨损的能力。这对研究新型压裂泵泵阀抗冲击磨料磨损性能的材料具有一定的指导意义。     

Abrasive Wear Map of Polymer Tapes in Sand Dust Environment

To make clear the wear conditions of ATM （Automatic Teller Machine） tribosystem when servicing in Chinese sand dust environment, abrasive wear of two kinds of polymer tapes specified for ATM, PI （Polyimide） and PEN （Polyethylene-2, 6-naphthalenedicarboxylate）, was investigated in simulated sand dust environment with ATM tape-scraper tribosystem under various conditions of loads and sliding distances. The surface profiles of worn tape were measured with a surface profiler in order to calculating the wear cross-section areas and the wear volumes. The specific wear rates of polymer tapes were calculated under load conditions of 0.6, 1 and 1.5 N, and wear mechanisms were in- vestigated with optical topography photos. As main results, the specific wear rates show stage variations in the wear process and the wear resistance of polymer tape shows good relationship with the mechanical deformation factors. In consideration of the service life, four wear models are generalized according to the magnitude of specific wear rates, which include no wear, mild wear, normal wear and severe wear model and the corresponding wear mechanisms for the four wear models are discussed with typical worn topographies. Based on the wear models and corresponding wear mechanisms, the abrasive wear maps of two polymer tapes servicing in sand dust environments are concluded for its industrial applications.     

Comparison of Biotribology of Swine Compact Bone Against UHMWPE

A pin-on-disk tribometer was used, in a comparative test to observe the tribological behavior of the swine femoral bone against UHMWPE with dry friction, physiological water and human plasma lubrication. The wear mechanisms of swine bones and UHMWPE were investigated by SEM. The experimental results of these wear tests demonstrated that both the friction coefficient and wear rate of UHMWPE were the lowest when human plasma lubrication was used. The wear mechanism of the compact bone was mainly fatigue wear with dry friction, corrosive wear under physiological water lubrication and abrasive wear with human plasma lubrication. For UHMWPE, the wear mechanism was adhesive wear and plastic deformation with dry friction, serious ploughing and fatigue fracture wear under physiological water lubrication, fine ploughing and plastic deformation with human plasma lubrication. An analysis of nitrogen elements on the wear surface of UHMWPE indicated that the content of nitrogen in worn areas was 16 times higher than that in unworn areas, which proved that serum protein deposition occurred on worn areas.     

Comparison of the Wear Behavior of UHMWPE Lubricated by Human Plasma and Brine

The effect of plasma and brine lubricants on the friction and wear behavior of UHMWPE were studied by using the geometry of a Si3N4 ball sliding on a UHMWPE disc under patterns of uni-directional reciprocation and bi-directional sliding motions. The worn surface and wear particles produced in these two lubricants were analyzed. Sliding motion pattern affected the friction coefficients lubricated with plasma, while seldom affected that lubricated with brine. UHMWPE lubricated with plasma showed about half of the wear rate of that lubricated with brine. The two rates were 0.75 pg/m and 2.19 pg/m for the two motion patterns, respectively. However, wear particles generated in plasma included a greater amount of small particles, compared to that in brine. In uni-directional reciprocation, the main wear mechanism is ploughing both in plasma and in brine. In bi-directional sliding modes, the significant characteristic is ripples on the worn surface in plasma, while there are oriented fibers on the worn surface in brine.     

燃机端面齿微动磨损分析及数值仿真

运用Archard磨损定律以及接触力学理论,研究了燃机端面齿楔形接触面在不同交变载荷力作用下接触面接触压力、接触宽度、间隙量、滑移量等接触特征参数随磨损过程的变化发展规律.结果表明,接触齿面的磨损是由于接触面间反复的相对滑动、磨损导致了接触面几何形貌以及接触压力的改变,这些因素又反过来影响磨损过程.各参数具有时间依赖性...     

磨料磨损若干问题的试验研究

研究了材料在不同硬度和粒度磨料磨损条件下的磨损特性，提出和解释了软硬磨料磨损机理转换的概念，建立了大小磨粒磨损系统发生磨料磨损的模型，分析讨论了软硬磨料磨损机理的关系和转换的条件以及大小磨粒磨损系统的磨损形式和对材料耐磨性的影响，对耐磨材料的开发和耐磨部件的强化提供了有益的启示。