石油机械加工制造的特点及质量控制分析

在市场经济环境日益复杂的情况下,石油机械的加工制造行业在市场竞争中也受到了一定的影响,在此基础之上,石油机械加工制造业面临着新的挑战。本文主要分析了石油加工制造业的挑战和难题,并且研究了具体的解决措施和石油机械加工制造业的质量控制措施,根据石油机械加工制造业的具体特点来提出自己的解决方案,促进石油机械加工制造业的良好发展,并且带动相关领域的全面发展。     

石油机械设计加工中常见问题分析

石油机械设计与加工技术是衡量一个国家石油工业发展水平的重要标志。石油机械设计加工过程中,迫切需要一些高质量的石油机械,并结合实际项目开发情况应用到油田勘探当中去。因此,想要保证机械产品的质量,就需要提升技术含量,技术含的提升过程中,最容易出现问题的地方是石油机械的加工与设计。因此,本文结合实践对石油机械设计加工中出现的一些问题进行细致分析,为我国石油机械制造产业的可持续发展提供建议。     

陶瓷抛光砖用磨具(一)

１前言 磨料磨具俗有工业牙齿之称。利用磨料磨具进行磨削研磨超精加工和抛光金属与非金属工件,不但能获得很高的精度和光洁度,而且可以加工其它切削方法难以加工的硬质材料如玉石玛瑙石材硬质合金等。因此,磨料磨具的应用十分广泛。陶瓷磨具是伴随９０年代初陶瓷抛光砖技术进入我国并迅速兴起、在仿制进口磨具的基础上逐步发展起来,经过７～８年的不断发展,无论规模还是技术水平都有很大的提高,已成为磨料磨具中一个重要而年轻的分支。２磨料磨具基本知识２．１磨料 磨料是制造磨具的主要原料,是磨具产生磨削、研磨、抛光作用的主体…     

微型Ni-W电沉积金刚石磨具的开发及其在硅切槽中的应用

探讨了直径为100μm的微型Ni-W电沉积金刚石磨具的制作方法及其在硅切槽中的加工特性,以评价该磨具的加工性能和优化制作条件.在制作磨粒直径为2～4μm的磨具时,通过射流搅拌电沉积溶液可获得较为均匀的磨粒分布,从而减小了磨具寿命的差异.关于磨具状态和磨具寿命,试验得出了最佳电流密度.从磨具寿命的角度出发,对磨削速度和进给量进行了优化.     

试论石油机械加工产业的现状及发展策略

论文分析了石油机械加工产业的宏观环境及微观环境,提出公司面临的机遇与威胁。就如何实施既定策略,提高石油机械加工产业竞争力进行了阐述。     

石油机械加工与制造行业特点及其质量控制措施

高质量的产品能够帮助企业赢得良好的信誉和更多的客户,石油机械加工与制造行业更是深知质量的重要性,所以要想提高石油机械加工与制造业的产品质量,就要对该行业的特点以及发展的现状进行了解,然后有针对性地对其产品质量制定控制措施,促进石油机械加工与制造行业的稳定快速发展。     

多孔陶瓷磨具的性能特点及研究进展

多孔陶瓷磨具是一类磨削效率高、磨削用途广泛的加工工具,通过详细介绍多孔陶瓷磨具的组成和微观结构,阐述了造孔剂的特点、不同造孔原理及造孔工艺对陶瓷多孔结合剂磨具性能的影响,分析了多孔陶瓷磨具的应用及国内外研究进展状况,并对多孔陶瓷磨具的未来发展做了展望。     

石油机械加工与制造企业的质量管理研究

面对激烈的市场竞争,石油机械加工与制造企业只有不断提高质量管理水平,不断创新质量管理方式,才能不断提高产品质量,使企业的产品在市场中更具竞争力,也使得企业能够在激烈的市场竞争中立于不败之地。本文将针对石油机械加工与制造行业的特点,对石油机械加工与制造企业的质量管理工作进行剖析,并提出一些建议。     

我国石油机械销售的现状分析

石油机械销售市场的变化给我国的石油机械制造企业带来了巨大的冲击,通过分析当前石油机械销售的市场环境,结合石油机械企业的产业现状,对提高我国石油机械企业竞争力的策略进行探讨。     

金属结合剂烧结磨具孔隙度与磨具性能之间关系的探讨

金属结合剂超硬材料磨具以其长的使用寿命和更适合于加工硬脆非金属材料而著称,但其较低的自锐性和不易修整的特点使其在应用上受到了一定的限制。在分析了烧结型超硬磨具磨削中出现问题的原因之后,通过实验对磨具性能与热压温度的关系、不同孔隙度对磨具力学性能的影响以及磨料种类的不同在磨具中的作用进行了实验研究。结果表明,孔隙度增加会降低磨具的硬度与强度,表面镀覆超硬cBN可以大大改善高孔隙度磨具的结合强度。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。