圆锥破碎机锥体的加工

本文介绍用组合机床实现圆锥破碎锥体加工的方法.其加工方式灵活,传动方式适应性广,具有很大的推广价值.     

薄壁件接刀痕的分析及解决方案

针对生产中薄壁零件加工后存在表面接刀痕和薄壁处发生变形的原因,提出改变装夹方式、装夹顺序以及优化刀具路径的方法,改善加工零件表面精度和加工尺寸精度。通过不同方式刀具路径的对比,进而验证优化刀具路径来改善接刀痕现象的可行性。     

油膜轴承锥套外圆低粗糙度磨削方法

本文从设备、磨削方法和磨削液三个方面,对油膜轴承锥套采用传统的装卡方式和加工方法不能够加工出低粗糙度产品的原因进行了总结。并根据多年实际加工经验制定出锥套外径低粗糙度的磨削方法及过程,并从上述三个方面加以讲述。     

铝电解槽加工方式和加工制度对节能的影响

本文结合155kA预焙阳极铝电解槽加工方式和加工制度的发展改造实践,通过对比各种制度下的技术经济指标,分析了加工方式和加工制度对节能的影响。     

热加工方式及总变形量对厚钼板退火组织的影响

采用锻造、锻造开坯+轧制、轧制3种热加工方式制备出了5 mm厚的厚钼板,讨论分析了加工方式及总变形量对钼板退火组织的影响。结果表明,在同样的加工变形量下,锻造加工或者锻造开坯的加工方式更有利于退火后板材细小均匀晶粒组织的形成。在同样的压力加工方式下,加工总变形量越大,钼板完成再结晶的温度越低,晶粒组织也相对细小均匀。在板材的热加工过程中,应该使其总的加工变形量大于70%,并尽可能采用大的道次变形量。     

UG在锻管复合型面数控加工中的应用

UG作为一款高端的CAD／CAM软件，在实际加工中有着广泛的应用。通过UGNX4．0自动编程的方式，在TK42200数控龙门铣镗床上加工压力容器上的关键件——锻管复合型面，生产效率高，加工质量好，生产成本低。该方法对其它复合型面的加工也有借鉴意义。     

托轮减重孔加工新方法

托轮是我公司出口产品-水泥回转窑设备托轮装置中的重要部件,做为重要承载装置,它直接承受筒体对它的作用力。本文通过对整体铸造和采用套料刀具加工减重孔的两种托轮减重孔加工方式进行比较,找到了适合托轮减重孔加工的最佳方法,解决了托轮减重孔加工高成本、低效率、质量差的瓶颈问题。     

钛合金冷切削加工实践研究

钛合金属于机械加工行业典型的难加工材料之一,为有效提高钛合金的冷切削加工性能,对钛合金冷切削加工进行长期的实践加工探索。分析钛合金冷切削加工方式车削、磨削、钻削、铰削和攻丝的加工过程,总结给出各种冷切削加工方式的刀具材料、刀具参数和切削用量的具体推荐数值。钛合金冷切削加工参数推荐值,可为钛合金材料的实际冷切削加工应用提供有用借鉴和必要的参考。     

径向局部圆弧工件的加工

径向局部圆弧工件的加工方式多种多样,差异性加工方式的属性因素有所不同,如效率、设备成本、刀具消耗、加工质量等因素。经过多年的生产实习实践,从加工原理、夹具设计、定位误差计算、夹具制造角度入手总结一套基于普通车床(或经济型数控车床)切实可行的径向局部圆弧工件多件加工方案。     

复杂曲面透明件数控加工固定方法研究

航空透明件外形越来越趋向于复杂曲面,给透明件的生产制造增加了难度。透明件的边缘与机身直接接触,其精度将直接影响透明件装配。本文根据透明件的外形和加工要素特点,分析了透明件加工定位的方案,以及复杂曲面透明件各类加工固定方法的优缺点。通过计算和验证方式,确定了透明件加工所使用工装的重要参数,提高了透明件数控加工的效率。     

中国钨矿选矿的百年变迁

中国的钨矿床发现百年,钨矿选矿经历了从手拣露头块钨、简单人工淘洗、引入简单机械选矿到大规模规范流程机械化选矿,从单一重选发展成重选-磁选-电选-化选多种方法相结合、综合回收钨矿中多种金属矿物的新型选矿工艺,展现了中国钨矿选矿百年发展的非凡历程。     

Adaptive memory: Determining the proximate mechanisms responsible for the memorial advantages of survival processing.

J. S. Nairne, S. R. Thompson, and J. N. S. Pandeirada (2007) suggested that our memory systems may have evolved to help us remember fitness-relevant information and showed that retention of words rated for their relevance to survival is superior to that of words encoded under other deep processing conditions. The authors present 4 experiments that uncover the proximate mechanisms likely responsible. The authors obtained a recall advantage for survival processing compared with conditions that promoted only item-specific processing or only relational processing. This effect was eliminated when control conditions encouraged both item-specific and relational processing. Data from separate measures of item-specific and relational processing generally were consistent with the view that the memorial advantage for survival processing results from the encoding of both types of processing. Although the present study suggests the proximate mechanisms for the effect, the authors argue that survival processing may be fundamentally different from other memory phenomena for which item-specific and relational processing differences have been implicated. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

铜带边部精整处理装备和技术的开发

目前国内外已有相关专家对变压器绕组的铜带边部精准处理进行了相关研究,但是对精准处理装备和处理技术没有涉及,本文分析了铜带边部精准处理情况,"五位一体"铜带边部处理精整处理装备的工作运行方式,该处理装置实现了对铜带边部缺陷的处理,为变压器绕组的安全稳定运行提供了技术支持。     

Local and global cross-modal influences between vision and hearing, tasting, smelling, or touching.

It is suggested that the distinction between global versus local processing styles exists across sensory modalities. Activation of one-way of processing in one modality should affect processing styles in a different modality. In 12 studies, auditory, haptic, gustatory or olfactory global versus local processing was induced, and participants were tested with a measure of their global versus local visual attention; the content of this measure was unrelated to the inductions. In a different set of 4 studies, the effect of local versus global visual processing on the way people listen to a poem or touch, taste, and smell objects was examined. In all experiments, global/local processing in 1 modality shifted to global/local processing in the other modality. A final study found more pronounced shifts when compatible processing styles were induced in 2 rather than 1 modality. Moreover, the study explored mediation by relative right versus left hemisphere activation as measured with the line bisection task and accessibility of semantic associations. It is concluded that the effects reflect procedural rather than semantic priming effects that occurred out of participants' awareness. Because global/local processing has been shown to affect higher order processing, future research may activate processing styles in other sensory modalities to produce similar effects. Furthermore, because global/local processing is triggered by a variety of real world variables, one may explore effects on other sensory modalities than vision. The results are consistent with the global versus local processing model, a systems account (GLOMOsys; F?rster & Dannenberg, 2010). (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Gender differences in implicit and explicit processing of emotional facial expressions as revealed by event-related theta synchronization.

Emotion information processing may occur in 2 modes that are differently represented in conscious awareness. Fast online processing involves coarse-grained analysis of salient features and is not represented in conscious awareness; offline processing takes hundreds of milliseconds to generate fine-grained analysis and is represented in conscious awareness. These processing modes may be studied using event-related electroencephalogram theta synchronization as a marker of emotion processing. Two experiments were conducted that differed on the mode of emotional information presentation. In the explicit mode, subjects were explicitly instructed to evaluate the emotional content of presented stimuli; in the implicit mode, their attention was directed to other features of the stimulus. In the implicit mode, theta synchronization was most pronounced in the early processing stage, whereas in the explicit mode, it was more pronounced in the late processing stage. The early processing stage was more pronounced in men, whereas the late processing stage was more pronounced in women. Implications of these gender differences in emotion processing for well-documented differences in social behavior are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

江西某钨钼铜矿石选矿试验研究

介绍了江西某钨钼铜矿矿石的选矿试验。试验通过对选别流程和粗选设备进行不同方案对比,选择了合适的方案,在小型试验基础上进行了扩大试验,为建厂投产提供了可靠依据。     

高功率激光加工技术的应用

激光加工代表着当今材料加工业的发展方向,具有其他加工方法所不可比拟的特点。文章对激光加工技术理论进行了简述,并对在马钢成功的实践案例进行了描述。     

我国铜加工技术的发展现状

改革开放以来，我国铜加工行业引进设备和技术改造同步进行，取得了显著成绩，铜加工技术有了较大的发展，笔者结合国外先进铜加工技术的发展情况，对我国铜加工技术的发展现状进行了分析，并提出了我国铜加工技术今后的发展方向。     

机械制图一体化在金属加工设备运行中的应用

传统金属加工设备存在持续运行连贯性较差的缺陷,以此开展了基于机械制图一体化技术的金属加工设备运行设计。引入积木式机体安装方法,设计金属加工设备运行机体,设计设备加工金属过程,控制金属加工设备电气运行方式,设计设备固焊流程。提出对比实验,验证提出设备可提升金属加工设备运行的连贯性,更具备市场经济效益。     

Simultaneous and successive processes, language and mental abilities.

Recent research on simultaneous and successive processing is reviewed as these processes relate to certain linguistic functions and mental abilities. In comprehending ambiguous sentences, successive processing appears to be involved in surface structure and underlying structure ambiguities, whereas simultaneous processing is related to lexical ambiguity. Successive processing is also involved in the syntactic organization of expressive speech. Several studies reported here suggest that in reading, successive processing is important for the development of elementary decoding skills, whereas simultaneous processing is related to the development of advanced levels of comprehensive skills. In terms of abilities, simultaneous processing was significantly related to spatial ability, inductive reasoning, and associative memory, while successive processing was significantly related to associative memory. (French summary) (42 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)