排序方式: 共有65条查询结果,搜索用时 453 毫秒
51.
罐体组对设备是铁道油罐车生产中的一个重要的环节.罐体组对新工艺要求新罐体组对设备适应各种圆柱、非圆柱罐体批量组对工作.本论文在目前组对设备基础上进行了大量创新结构设计,对于新设备关键部件旋转装置、径向移动装置、内撑式组对、外箍式组对装置等进行了技术设计和简要结构说明. 相似文献
52.
53.
54.
55.
56.
57.
为了满足新型陶瓷膜中试流程各操作参数处于最优值,在分析陶瓷膜中试流程结构与工作原理的基础上,分别对控制系统总体方案和系统软硬件展开设计;提出采用三回路专家PID控制算法,实现对压差、流量的精确控制;系统由PLC为控制器,触摸屏为上位机,压力变送器、流量变送器及温度变送器为反馈单元,电动调节阀为执行机构等部分组成;运行结果显示,对进料泵出口流量、循环泵出口流量跟踪控制时,误差在5%内,对陶瓷膜回路进出口模拟差压跟踪控制时,误差在3.3%内,表明系统控制精度高,且鲁棒性好。 相似文献
58.
针对目前掩膜电解加工深度溶解能力受限问题,以微凹坑阵列为研究对象,提出了基于流体动压效应的扫描阴极掩膜电解加工新方法。利用高流速电解液冲刷微凹坑表面堆积的电解产物,提高深度溶解能力,并且借助扫描阴极射流产生的流体动压效应使掩膜与工件表面动态贴合,从而简化工艺装置设计。基于加工试验,探讨了不同平底阴极结构和加工参数耦合作用对微凹坑尺寸变化的影响,最终实现直径259.8μm、深度44.1μm和直径418.1μm、深度102.7μm微凹坑阵列的加工,论证了扫描阴极掩膜电解加工方法具有提高深度溶解的能力。 相似文献
59.
60.
NC electrochemical boring method was adopted to solve the processing problems of stepped inner holes with small inlet,large inner cavity,and large deep diameter ratio.According to the structural characteristics of stepped holes,cathodes with different spiral outlets,different rotating angles,and different taper of shunt blocks were designed.The flow fields were analyzed by FLUENT,and the results show that the cathodes with 24° conical angle,360° rotating angle,and double spiral outlets meet the design requirements.Orthogonal tests were carried out to study the influences of processing parameters on removal amount and processing clearance.Main size of the cathode is determined by the testing results,and the problems of uneven wall thickness of the stepped hole are solved by correcting the tapers of the cathodes.By the proposed method,errors of the stepped hole are small,and quality of processing surfaces is good,which meet the production requirements. 相似文献