锌铁合金在电缆桥架电镀中的应用

总结了电缆桥架锌铁合金电镀的工艺配方,探讨了镀前镀后处理、主盐和导电盐含量、线槽悬挂方式、阴极电流密度、镀液pH值、添加剂ZF、ZF-A、ZF-B含量等因素对电缆桥架电镀质量的影响：提出了镀液的维护方法生产实践证明：当主盐ZnCl2和导电盐KCl的质量浓度分别为55～75g/L和230g／L、阴极电流密度为0.8～1.2A／dm^2、镀液的pH值为4～5、添加剂ZF—A含量为0.2～0.4kg／t、ZF含量为1．5～2kg／t、ZF-B含量为0.7～1kg／t时,采用锌铁合金电镀,不但解决了电缆桥架电镀难的问题,而且其防护性能高于普通镀锌。     

饰品耳坠金属架多工位级进模设计

针对饰品耳坠金属架尺寸小、折弯部分相对主体部分所占比例过大等问题,制定了合理的零件排样方案,设计了一副多工位级进模,将模具中的压型凹模镶块设计成浮动形式,解决了零件弯曲角度超过90°后脱料困难的问题。实践证明,模具结构合理,成形件质量良好,生产效率较高,对同类零件的模具设计有一定参考价值。     

新型6.3m捣固机的研究

介绍新型6.3m变形齿轮齿条捣固机的结构、特点及工作原理,该捣固机采用了变形齿轮齿条提锤机构,解决了标准齿轮齿条随机啮合可能顶死的问题。这种提锤结构避免了使用昂贵的摩擦片及经常粘接、修补或更换摩擦片的烦恼。锁定机构采用液压油缸、连杆及压缩弹簧控制。     

大屯矿区井下辅助运输系统改造设计

为了提高大屯矿区井下辅助运输系统的运输效率,合理解决采区运人问题,结合矿井的实际条件,对采区辅助运输系统提出了"无极绳绞车牵引+卡轨车系统"、"柴油机齿轨车+卡轨车系统"2种改造方案,并进行比较和优选。改造方案对类似矿井辅助运输系统具有一定的指导意义。     

基于计算机视觉的齿条测量方法研究

提出一种基于计算机视觉的齿条测量方法。建立一套计算机视觉的测量系统,系统把CCD摄像机安装于光栅反馈式精密导轨上,精密导轨带动CCD摄像头移动对齿条各处进行图像采集,通过对采集图像的处理,实现全齿的测量,获得齿条的基本参数如齿距p、齿厚s等数据。实验对指示表卡尺齿条进行测量,并与东京精密S1910DX3轮廓度仪的测量结果对比,结果表明,此方法的测量精度能满足该类齿条测量的要求。该测量方法简单实用,有效提高了卡尺齿条的测量效率,为卡尺齿条的在线检测提供技术保障。     

核电站拦污网主绳拉力监测与分析

为避免核电取水系统堵塞导致停堆或降低发电功率,需在取水口前布置拦污网。对拦污网主绳的拉力进行实时、连续、精确监测预警分析,可识别拦污网的工作状态,对核电站安全运行具有重要的意义。本文通过对拦污网主绳拉力进行连续监测,采用无线传输技术采集传输拉力信号,获得了主绳拉力的变化规律。在此基础上进一步分析了潮汐、海浪等因素对主绳拉力的影响,确定了对拉网造成较大影响的不利条件。监测结果表明海浪对拦污网拉力影响显著,拉力随潮汐呈周期性变化。     

走钢机行走小车的故障分析与改进设计

针对走钢机行走小车经常出现的减速机输出轴易弯曲、齿轮齿条易磨损等故障现象,从齿轮、齿条受力原理和行走小车的结构角度,提出了改进设计的方案。     

Optimal storage rack design for a 3-dimensional compact AS/RS

In this paper, we consider a newly designed compact three-dimensional automated storage and retrieval system (AS/RS). The system consists of an automated crane taking care of the pallets' movements in the horizontal and vertical direction. A gravity or powered conveying mechanism takes care of the pallets’ depth movement in the rack. Our research objective is to analyze the system performance and optimally dimension the system. For single-command cycles, the crane's expected retrieval travel time is the same for gravity and powered conveyors; we give a closed-form expression. From the expected travel time, we calculate the optimal ratio between three dimensions that minimizes the travel time for a random storage strategy. In addition, we derive an approximate travel time expression for dual command cycles for the system with powered and gravity conveyors, respectively, and use it to optimize the system dimensions. Finally, we illustrate the findings of the study by a practical example.     

整体式货架三维有限元分析

根据整体式货架的结构和承载特点,利用有限元分析软件ANSYS建立了其三维实体模型,在考虑了各种载荷的基础上,对其在各种载荷工况下的应力和位移进行了计算,为类似货架的设计计算提供了参考。     

Instrumental Design and Verification of a Nondestructive Testing with Neutron Backscattering for Boron-based Material Characteristics

The in-situ nondestructive testing (NDT) instrument using neutron backscattering for boron-based materials was developed successfully in this work. The capability verification of confirming qualitatively the integrity of the boron-based material as neutron absorber and characterizing quantitatively the gap defect size was demonstrated herein. For extending the technique at the fast traverse mode, a derived relationship between the defect size and output signal considering the effects of scanning speed and time constant was presented in this work for data interpretation. We also performed an experimental sensitivity analysis as a function of operation parameters. Through a comparison of the increase in output counting rate current between calculation and measurement, the deviation of the theoretical prediction at the fast traverse mode was within ±30%.