In contrast, coal, steel and nonferrous metal stocks have surged for the past several months, gaining momentum since June. The 300 Material Index rose almost 20 percent to 2454.73 on July 21 from 2047.95 on June 2. The index began its ascent early last year, and reached 1642.56 on Feb 5, 2016.大庆工字钢弯拱机机械看点安康隧道用弯拱机新闻要闻大庆工字钢弯拱机机械看点阳江工字钢冷弯机机械资讯大庆工字钢弯拱机机械看点宿州工字钢冷弯机行业资讯 "Oh, Mamma, let us pack to-day! Please, please, right away," begged Rita coaxingly. "I will help you, and Ella can help you too, and Fr?ulein Hohlweg, and so we can go away to-morrow and then——"

工字钢冷弯机简介：

WGJ250型液压工字钢弯拱机是我厂研制的新式全自动工字钢曲折设备。选用液压体系，具有传动平稳，压力大等特色，能精确定位，大幅度进步地道工字钢加工精度。液压工字钢弯拱机广泛应用于C型钢、工字钢、角钢、槽钢、道轨、方钢、钢管等型钢的拱形卷圆、变径、定角弯曲。使液压操纵系统定位准确，所弯型钢一次自动成型，效率高、操作方便。并且加工精度大，主要应用于隧道，地铁，水电站，地下洞室等。

构造构成：

该设备由主电机、减速器、滚轮、油泵电机、齿轮油泵、溢流阀、电磁换向阀、作业油缸、顶轮及油箱等部件构成。

设备规格与技术参数

1、可弯曲钢材：

【工字钢】—I25,I22,I10-I18

【H型钢】—175H,200H,125H,150H

【U型钢】—25U,29U,36U

【矿工钢】—9#,11#

【槽钢、轨道钢、圆管>89】,【方管】等中大型钢材均可

2、液压系统压力 20Mpa

3、总功率 12KW

4、小的弯曲半径 2m

5、油缸推进速度 1-13mm/s

6、主动滚轮转速 7r/min

7、整机重量 2180Kg

8、外形尺寸 2.5m×1.5m×1.2m

工作原理

将工字钢放在冷弯机上，与减速带动的滚轮接触后，将压紧手柄进给锁紧，启动电机油泵组，由电动油泵输出的高压溢流阀（可调整所有压力），进入集成块到电缆阀，有电液阀和动点开关（点进，点退）控制油缸工作，工作油缸推进，将工字钢与三个支撑游轮压紧并为发生弯曲变形是时开始计算，油缸推进的长度进程为10mm-15mm,开主电机带动工字钢工作，反复操作，达到所需为止。

Walking from the east gate of the Central Academy of Fine Arts to its main studio takes less than 30 minutes, but for Li Cheng, a former campus security guard at the academy, the journey has taken almost a decade. 福建龙岩隧道用弯拱机公司看点太仓WGJ-250工字钢冷弯机机械快讯大庆工字钢弯拱机机械看点鹿泉工字钢弯拱机全国热卖