Study on intelligent welding mobile robot with the function of auto-searching weld line

0IntroductionWelding mobile robot with mobility,strong magneticadhering force and higher intelligence has already becomea perfect means for automatic welding of large-scale struc-ture[1-2],such as the welding of ship hull and deck,welding of spherical tank and welding of large pipeline,and so on.Recently,some researches have been done in thefield of autonomous welding mobile robot.Jiang Lipei andhis coworkers developed an all-position spherical tankwelding mobile robot based on linear CCD se…     

High-throughput drilling of titanium alloys

Experiments of high-throughput drilling of Ti–6Al–4V at 183 m/min cutting speed and 156 mm³/s material removal rate (MRR) using a 4 mm diameter WC–Co spiral point drill were conducted. The tool material and geometry and drilling process parameters, including cutting speed, feed, and fluid supply, were studied to evaluate the effect on drill life, thrust force, torque, energy, and burr formation. The tool wear mechanism, hole surface roughness, and chip light emission and morphology for high-throughput drilling were investigated. Supplying the cutting fluid via through-the-drill holes has proven to be a critical factor for drill life, which can be increased by 10 times compared to that of dry drilling at 183 m/min cutting speed and 0.051 mm/rev feed. Under the same MRR of 156 mm³/s with a doubled feed of 0.102 mm/rev (91 m/min cutting speed), over 200 holes can be drilled. The balance of cutting speed and feed is essential to achieve long drill life and good hole surface roughness. This study demonstrates that, using proper drilling process parameters, spiral point drill geometry, and fine-grained WC–Co tool material, the high-throughput drilling of Ti alloy is technically feasible.     

火灾混凝土结构损伤检测技术进展

分析火灾混凝土损伤特征以及传统火灾混凝土损伤检测方法的特点和局限性。介绍近年发展起来的火灾混凝土损伤检测新技术，包括颜色分析、损伤深度检测、红外热像法、热发光法和电化学法。系统地总结和评价这几种新技术的基本原理、优点和使用范围，并指出了该领域今后的发展方向。     

自动线计算机图形监控系统的研究

介绍一种通过与PLC进行实时通讯，将自动线各部分工作状态动态地显示在计算机窗口界面上的图形化监控系统。该系统的运用，使整个加工过程的监控更为有效、直观。     

小型圆盘刀纵剪机组的设计

根据焊管生产纵剪窄钢卷的需要，设计制造的小型圆盘刀纵剪机组价廉实用。介绍了武昌县钢管厂自行设计制作的纵剪机组构成及其设计原理。     

5t/h简易树脂砂生产线的工艺设计与装备选用

主要介绍了近期为一铸造公司设计的简易树脂砂生产线工艺特性以及设计的指导思想和设备选用情况。     

高频红外吸收法测定银中的碳硫

作者采用高频红外吸收法同时测定Ag中的C和S,对试样的制备、助熔剂的选择、分析条件等进行了较详细的研究.方法快速、简便、灵敏度高,C、S的测定范围分别为0.002%～1%和0.002%～0.1%,对自己配制的合成样进行6次平行测定,其RSD分别为:C = 0.34%和S = 2.01%,C、S的回收率都在95%～105%,获得了满意的结果.     

高速切削的刀具技术

高速切削是现代制造技术的一个重要部分，而刀具的性能及技术是实现高事切削的前提条件之一，本文对高速切削的刀具技术进行了系统论述，指出了有待于进一步研究的几个方面。     

高铬钢玉砂生产铸钢件复杂坭芯

介绍了高铬铜玉砂的一些性能特点，在铸铜件的生产过程中，对某些形状复杂、受热条件差的况芯采用高铬钢玉砂作为耐火骨料的有机酯自硬水玻璃砂来生产，并详细介绍了有机酯高铬钢玉水玻璃砂的配制工艺及其经济效果。     

等离子弧焊自动控制器的研究

本文介绍了一种小孔法等离子弧焊双参数微机控制器。它以小孔电压作为检测对象，以焊接电流和焊接速度作为被控对象，采用微机进行实时控制，具有灵敏度高、灵活性好、结构简单、与焊机控制部分联机自动化程度高、操作方便等优点。工艺考核表明：控制系统允许焊接规范参数有较大的波动范围，并能降低对工件装配质量的要求。