IC641VPP950通用电气备件现货

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型号：IC641VPP950
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IC641VPP950通用电气备件现货

对汽车起重机吊重升降、吊臂伸缩、吊臂变幅3机构既有锁紧又有限速要求，庆当采用能同时满足锁紧和限速两项要求的平衡阀，再加以机械制动。支腿应采用能起双向锁紧要求的双向液压锁。转台回转机构仅需借助手动换向阀M型中位的短时间锁紧和换向阀自身的限速作用即可。河北中钢全连续冷连轧机组中开卷区控制采用Siemens PLC，实现了逻辑控制、速度控制、张力控制和区域跟踪，取得了令人满意的控制效果。 1 设备组成及工艺描述河北中钢1250mm八辊五机架全连续冷连轧机组自动控制系统分成三个区：开卷区、轧机区和卷取区。机组开卷区基本设备组成和工艺过程示意图如图1所示。

原料钢卷经过酸洗后，放在冷轧原料仓库中，检查确认后，由吊车运至开卷机前放置台上，等待上卷。钢卷小车将钢卷从放置台运送到开卷机前，人工对中，将钢卷放置在卷筒上，然后卷筒涨紧，钢卷小车：下降，返回到放置台处，等待下一个钢卷。卷筒涨紧钢卷后压辊压紧钢卷，然后，开卷机和压辊开始转动，带钢头部经由引导板进入夹送辊，夹送辊夹紧带钢并开始转动，将带钢头部送至矫直机进行头部矫直。之后，带钢头部进入双切剪，切除带钢头部不合格的部分。切头后的带钢由转向夹送辊夹送，送至汇聚夹送辊，然后进入焊机和前一卷钢进行焊接。焊接完毕后，将部分夹送辊抬起，焊缝通过人口S辊组进入活套，开始充套。当前一个钢卷的带尾在开卷机卷筒上还剩一定长度时，机组开卷区开始自动降速运行。当钢卷带尾接近双切剪前时，开卷机和人口S辊组停车，双切剪将带钢尾部切除。带钢切尾后以穿带速度运行至闪光焊机，在焊机处与下一个钢卷的带头通过焊机焊接在一起，使得带钢能够连续地通过机组后续设备。机组头部设有两台开卷机、两台双切剪。当一台开卷机处于正常运行时，另一台开卷机则将下一个钢卷的头部打开，双切剪完成头部剪切，做好焊接前的准备。焊接完成之后，机组开卷区开始升速，带钢以高于轧机区的速度经过人口S辊和1＃纠偏辊后进入活套，当活套充满后，开卷区速度降至轧机区速度，并与轧机区同步运行。 2 控制系统硬件组成及功能开卷区自动控制系统采用了先进的EIC一体硒化结构，构成了一套功能完备的综合控制系统。基础自动化系统采用电气、仪表一体化设计，主要由监控操作站HMI、顺序控制PLC、远程站以及通信总线等组成。其网络配置见文献[1]。监控操作站采用工业控制计算机，用于实现生产过程的监视、操作、报警、趋势记录、报表打印等。采用Siemens公司Simatic WinCC组态软件，进行操作站监控操作画面的组态编程。HMI画面包含了屏幕菜单显示、工艺流程图画面显示等功能，一目了然，为操作工提供了方便。顺序控制PLC采用Simatic S7-400 PLC，用于生产过程的数据采集、回路控制、顺序控制以及连锁控制等。采用Step 7编程语言实现逻辑控制。开卷区控制由一台SimaticS7-400完成。系统硬件配置如下：S7-400主机架；CPU 416-2DP模块；电源模块；以太网通信模块；DP接口通信模块；32DI输入模块；32DO输出模块；ET200M I／O站(包括IMl53-1接口模块、I／0模块等)。由于开卷区控制区域非常长，：工艺布置比较分散，使得各个设备的检测和控制点位置距离控制室非常远。因此，开卷区控制系统采用了Simatic ET200M系列远程I／O站，通过Profibus-DP现场总线与控制室Simatic S7-400相连，不仅利于系统信息的实时响应，又利于管线敷设施工，节省大量电缆材料，方便系统调试。另外，七台主传动电机的全数字直流装置6RA70也通过Profibus-DP现场总线与控制室S7-400相连。开卷区S7-400通过以太网与轧机区的SimaticS7-400，TDC和卷取区的S7-400相连，保证整个生产线的完整一致。 3 系统软件实现按照工艺要求，开卷区操作方式可分为两种：整机同步方式和区域同步方式。整机同步方式就是在轧机建立张力运行时，甩掉活套，活套只当转向辊处理。开卷区所有设备的速度与轧机区保持同步。此种方式只在初始调试阶段或活套出现故障时使用。区域同步方式就是在轧机建立张力运行时，活套正常投入，开卷区独立于轧机区操作，活套可以实现充套、放套，并与焊机配合，保证轧机的全连续轧制。以上两种方式可通过手动选择：在轧机区主操作台上设置一个整机／区域的选择按键，可供操作工根据现场情况而定。methods to prevent the occurrence and development of cracks, continuously improve the concrete pouring quality and meet the requirements of safety and stability of building structures. According to the traditional central mechanism, there are mainly three types of tire vulcanizers, namely AutoForm type represented by the original NRM company of the United States (type A in China for short), bagomatic type represented by McNeil of the United States (type b) and Aubo type represented by Herbert of Germany (type C). Other forms can be said to be the modification or derivation of these three basic forms. After entering the 1980s, Mitsubishi Heavy Industry of Japan absorbed the advantages of other forms on the basis of type a vulcanizer and developed rib (rolling in blinder) dual-mode tire setting vulcanizer, namely capsule turnover vulcanizer. This kind of vulcanizer has been rapidly popularized all over the world because it is suitable for the vulcanization of high-precision radial tire. Taking 1050rib tire vulcanizer produced by Guilin rubber machinery factory as an example, this paper discusses the structure and characteristics of rib tire setting vulcanizer. 1. Main structure of rib tire vulcanizer the working principle of rib vulcanizer is as follows:

electric machinery

Drive the crank gear and connecting rod, the cross beam moves vertically and horizontally under the action of the crank gear and connecting rod, lock the mold between the cross beam and the base through the vertical movement of the cross beam, and then produce the clamping force required for tire vulcanization. A pusher is arranged on the cross beam, and a central mechanism is arranged on the base. Through the horizontal movement of the cross beam, the actions of tire loading, stripping of tire and capsule and tire unloading can be realized. Throughout the vulcanization cycle, the beam remains horizontal without tilting. During vulcanization, superheated water is injected into the capsule of the central mechanism to play the role of water tire. The tire is finalized and vulcanized under high temperature and high pressure between the closed upper and lower molds. The machine is composed of main engine, tire loading mechanism, rear inflation device, pipeline system and electrical control system. The main machine includes transmission system, vulcanization chamber, central mechanism, ejector and fixture, frame tire unloading raceway, tire unloading rod, etc. Compared with the traditional B-type curing