利用清洗机去蜡

在产品总装时,很多零件需要进行除蜡处理,为此我们改装了一台T110型链条通过式清洗机,把原来清洗机闭式循环水改为开式循环水。再在地面上挖一个水池(见图示)。水是采用蒸汽加热,当水池的水沸腾后,利用水泵把水压到清洗机里,经清洗机的喷嘴喷射到零件表面上,把蜡熔化并冲洗掉。蜡随水一起流回水池内时,由于流速慢,蜡和水比重不同,熔化的蜡慢慢地浮在回水池上部,     

熔模铸造用机械自动压蜡机

设计制造了一种熔模铸造专用气压式机械自动压蜡机，该压蜡机可批量生产小型低温蜡模，在正常工作期间一般不需人工操作，蜡模质量稳定，改善了生产环境，降低了劳动强度。简要介绍了该压蜡机的结构和工作原理。     

熔模铸造中蜡模表面鼓包问题探讨

蜡模表面鼓包问题是熔模铸造中较常见的一种缺陷，通过从蜡模的压注温度、注射压力、保压时间、新旧蜡料的配比和压型的排气性等方面进行调整，可消除该缺陷。     

新型无源输油管道清管器的可行性研究

采用机械除蜡装置进行输油管道清管时,由于管道的弯曲、扭曲及蜡层较厚等原因,发生清管器的卡堵是一种普遍现象.文中提出了一种新型的防卡堵装置设计方案,包括尺寸、滚刀、流道、皮碗及排屑的设计,对高效清理作了验证,并进行了清管器可行性的理论分析.新型无源输油管道清管器能够满足防卡堵和高效清理的要求.     

基于PLC的蜡料制备机电气控制系统的应用设计

蜡料制备机是一种自动化程度要求较高的成套机电设备，用PLC技术设计蜡料制备机的控制电路系统，改变了蜡料制备机控制的不协调性，实现了对蜡料制备机工序的自动控制，取得了很好的经济效益。     

无导线直热式电热刀

无导线直热式电热刀技术，代替过去用酒精灯加热锯条刀片的落后方法，该技术方法主要用于精铸焊装蜡模，由插座．电热刀、串联电阻．蜡盒：电源变压器等组成。     

柴油机燃油水寒宝的维护保养及常见故障排查方法

<正>1.燃油水寒宝的功用工程机械柴油机用燃油水寒宝安装于低压燃油供给油路,主要由电动泵、电子控制器、除水放心滤芯等3部分组成,如图1所示。燃油水寒宝集泵油排气、预热解蜡、燃油滤清功能为一体,可在临界温度作业时有效解决燃油结蜡问题,确保低压油路畅通,同时将燃油中的水分及杂质过滤出去。目前,燃油水寒宝在满足国Ⅲ排放的工程机械中得     

汽车内腔防护蜡的研制

为提高汽车整车的防锈能力，需对车身点焊形成的缝隙、夹层、空腔、装配孔的边缘等部位喷涂内腔蜡进行防锈。本课题研制的内腔防护蜡与国内某汽车厂的同类产品性能相当，常温喷涂，工艺实施简单。     

十二工位压蜡机

十二工位自动压蜡机由两部分组成,即气动压蜡机和蜡模自动起型机部分,如图所示。 1.气动压蜡机由压蜡系统、恒温系统等部分组成。将蜡料(温度47℃)装入蜡缸1中,开启阀门2,使压蜡缸3向下移动,蜡料沿管道18输入压枪4中。蜡料管路18用泵6将恒温水打入蜡管外套及蜡枪外套中,使蜡料保持恒温。恒温水是用红外线加热器7加热,由温度计     

卧式双头自动压蜡机

我厂自行设计制造的卧式双头自动压蜡机(图1),是由压蜡罐、蜡枪、压型开闭机构,控制系统等部分组成。能自动、连续、完成压蜡、开型、取模、合型等动作,生产节拍为20秒。该机可装两套压型,由两个压蜡枪同时进行生产,比一般手工开、合型的转盘式压蜡机生产率高五倍以上,适宜于大量生产小型蜡模。为适应批量不大的生产情况,从自动压蜡机的压蜡     

A study on surface polishing of SiC with a tribochemical reaction mechanism

This work investigates the surface polishing of silicon carbide SiC using the tribochemical reaction mechanism. Different metal discs – cast iron, AISI 304 stainless steel, S45C medium carbon steel plated chromium, brass and copper – are used to polish SiC in water and kerosene, respectively. The experimental results show that ferrous metal discs can effectively polish SiC in water. Also, no surface damage or scratches on the polished surface of SiC are observed by this method. The polishing debris was analyzed by electron spectroscopy for chemical analysis. The analyzed results indicate that the polishing surface of SiC is removed tribochemically with the aid of catalytic effect of iron oxide. Moreover, in this process the maximum material removal rate is about 0.06 m/h.     

The Influence of Polydimethyl Siloxane on the Friction and Wear of Polyphenylene Oxide Under Boundary Lubrication Conditions

Experiments are described in which polyphenylene oxide (PPO) specimens were first slid against EN31 steel in the presence of polydimethyl siloxane (silicone fluid) and then slid without any external injection of silicone fluid until the friction reached the value characteristic of dry conditions. Nominal Hertzian line-contact conditions were maintained throughout each experiment (despite the wear of the PPO) by slowly rotating the PPO pin about its cylindrical axis while its flat end-face was itself sliding against the cylindrical surface of the EN31 steel cylinder, thereby maximizing the possibility of true boundary lubrication. These experiments showed that the modified surface layer produced during sliding in silicone fluid is the result of adsorption of the fluid into the polymer and that absorption is primarily a consequence of the wear process itself. Electron probe microanalysis and Rutherford back-scattering of α-particles were used to examine the worn polymer surfaces to show that some migration of fluid from the surface layers into the bulk polymer must occur. Thermomechanical analysis was also used to show that the silicone fluid penetrating the surface of PPO during wear leads to plasticization rather than a simple physical mixing. The results are dicussed in terms of previous work showing that only traces of fluid are necessary for polymer lubrication. The importance of ensuring that truly boundary lubrication conditions operate in polymer/metal systems is emphasized, especially if the system is expected to eventually function in starved lubrication conditions. Suggestions are made for further work necessary to substantiate (a) the possibility that the uptake of fluid occurs through surface cracks and fissures caused by the high stresses occuring at those asperity contacts not protected by a fluid film and (b) the possibility that once induced into a surface layer of a Polymer, the fluid can provide almost limitless protection from high frictional forces (at the expense, however, of significant wear of the polymer).     

夹套式脱蜡釜新型承压快开门机构的开发

提出了一种用于夹套式脱蜡釜等压力容器上的新型承压快开门机构 ,介绍了该新型承压快开门的设计要求、结构、工作原理和组装工艺要点及应用效果。     

基于微螺线管电感式传感器的金属颗粒形态对输出特性影响的研究

基于电感测量技术与微流体技术的油液检测芯片, 不仅可以区分出铁磁性和非铁磁性金属颗粒, 还可以对油液中的颗粒进行计数统计和颗粒大小测量,从而判断金属颗粒污染物的来源及设备的磨损状态。通过理论分析、数值模拟及实验验证, 分析不同形态铁磁颗粒退磁场, 研究铁磁颗粒形态对电感式传感器的输出影响。建立理论模型描述不同形状颗粒的退磁因子、磁化场, 以及磁化的金属颗粒产生磁场从而导致线圈电感发生变化。基于模型计算并验证同体积下球形、不同轴长比的圆柱、椭球颗粒的磁场和电感输出, 分析结果显示颗粒越细长、退磁因子越小则越容易磁化, 因此细长颗粒引起传感器的电感变化更大, 另外圆柱形颗粒的电感变化大于旋转椭球型颗粒。     

装甲装备黑色金属零部件超声波除锈技术研究

针对海水对装甲装备黑色金属零部件镑蚀的特点,阐述了锈层的组成、锈蚀程度及基本特征,介绍了环保、高效、安全的超声波除锈剂,规范了各种锈蚀程度的典型超声波除锈工艺,形成了黑色金属零部件除镑技术,提高了装备维护保养质量和效率.     

水溶性硼酸酯的摩擦学性能研究

利用四球机和环块试验机考察了一种水溶性硼酸酯在水中的摩擦学性能 ,并用X射线光电子能谱仪 (XPS)和电子探针 (EPMA)对摩擦表面进行了分析。摩擦学试验表明 :水溶性硼酸酯在水中具有良好的润滑性能和承载能力。表面分析证明元素S ,N和B在磨斑表面分布比较均匀 ,且B和S元素发生了摩擦化学反应。水溶性硼酸酯的抗磨作用机理是其在摩擦过程中发生了摩擦化学反应 ,生成了含硼酸、三氧化二硼、有机氮、二硫化亚铁、硫酸亚铁及摩擦聚合物等的复合膜 ,有效地提高了水基液的减摩抗磨性能     

环保型水基金属清洗剂的研制

介绍了一种环保型水基金属清洗剂,根据金属表面的特性和油污特征,优化复配了有机生物助洗剂、硼酸钠和复合表面活性剂等主要组分,并试验研究了各组分含量对清洗效率的影响规律。该清洗剂已在某大型车辆厂推广使用,它能代替碱性清洗剂和有机溶剂,有效地进行金属零部件的脱脂清洗、涂装和电镀的前处理,表现出优质、高效、环保等特点,具有实际应用前景。     

冷挤压工艺在电器工程零件制造中的应用

介绍了一种冷挤压工艺在有色金属零件制造中的应用,它与传统的冷挤压工艺是在一个封闭的型腔中完成金属材料的成型。该方法也可以应用到一般金属零件的加工和小型复杂零件的加工中。     

THE EFFECT OF THE CUTTING FLUID ON SURFACE ROUGHNESS IN BORING OF LOW CARBON STEEL–TECHNICAL COMMUNICATION

In spite of their environmental and human health problems, the cutting fluids still have been used widely in industry due to cutting fluid application can increase cutting performance in metal cutting. In this article, the effect of the cutting fluid on surface roughness in boring of AISI 1030 low carbon steel was investigated depending on BUE and chip formations and other cutting parameters, such as cutting speed, feed rate and tool nose radius. In most of boring experiments, the wet cutting did not show more preferable results than dry cutting. However, cutting fluid application with big nose radius and small feed rate improved the surface roughness up to 80%. This progress was attributed to a favorable chip formation as much as effective cooling.     

THE EFFECT OF THE CUTTING FLUID ON SURFACE ROUGHNESS IN BORING OF LOW CARBON STEEL-TECHNICAL COMMUNICATION

In spite of their environmental and human health problems, the cutting fluids still have been used widely in industry due to cutting fluid application can increase cutting performance in metal cutting. In this article, the effect of the cutting fluid on surface roughness in boring of AISI 1030 low carbon steel was investigated depending on BUE and chip formations and other cutting parameters, such as cutting speed, feed rate and tool nose radius. In most of boring experiments, the wet cutting did not show more preferable results than dry cutting. However, cutting fluid application with big nose radius and small feed rate improved the surface roughness up to 80%. This progress was attributed to a favorable chip formation as much as effective cooling.