SHUTTLESTEELSTRUCTURE.docVIP

第  PAGE 13 页 共  NUMPAGES 13 页 SHUTTLE制作工艺 Fabrication Procedure for Shuttle Steel structure 一、SHUTTLE STEEL STRUCTURE结构概述 Brief Introduction to Shuttle Steel Structure SHUTTLE STEEL STRUCTURE为弧形框架结构，现以其中第一段为例简述其建造工艺。SHUTTLE结构形式如下图 Shuttle Steel Structure is arc-shaped frame structure and this procedure is based on one of the sections as an example. Please see the shuttle structure picture as below: 关键尺寸及制作难点 Key Topics 工字钢变形控制 H Beam welding distortion control 项目ItemH1H2D1D2公差 Tolerance±2mm±1.5mm±2mm±2mm整体框架尺寸 Shuttle frame dimension control Rack 尺寸控制（同轴度、弧度）Rack hole dimension control ( axiality、radian) 制作方案 Fabrication Plan 根据shuttle的结构特点和机加工的技术要求，shuttle采用倒装的方式建造，shuttle装焊报验合格后进行镗孔。其中工字钢采用侧装的方式进行建造。 The Shuttle will be fabricated in inversion-fitting method and the line boring will be carried out after welding inspection according to its structure characteristic and technical requirement of machining. The “工” steel structure will apply side-fitting method. 四、制作流程 Fabrication Process 4.1框架制作 Frame Fabrication 流程4.1.1：工字钢拼接 H beam fabrication Step 4.1.1: Top plate web plate of H Beam frame splicing. 1）腹板拼板 Web plate splicing 腹板板厚较薄，在拼板制作时，在四周用小的卡码卡住然后再进行装配、焊接。 The web plates must be fixed on the jig by clamps while splicing because it is only 6mm which is very easy to get distorted. 腹板拼版过程中采用槽钢进行加强以减少变形。 U-steel should be used as strengthen to avoid distortion on flatness. 拼板在胎架上进行（板厚差），拼板完成之后进行平面度矫正。 Splicing must be done on the jig. Flatness must be checked and rectifying after splicing. 2）安装腹板纵向加劲肋板 2）Fitting wielding of strengthening plate. 加强筋安装前划线及打磨处理 Marking fitting line of strengthen plate. The make line must be lay out in true measurement on computer, 30mm width of fitting line must be grinded before fit up. 焊接时严格按照先立后平、先中间后四周的顺序焊接，长度大于2米的长焊缝采用分中退焊的方法焊接较少焊接变形（焊接平角焊时要求施工人员先焊结构正面，待结构正面的焊缝自然冷却后再焊结构背面）。 Vertical welds must be welded first then the downward welds. The weld which is longer than 2m must be welded from the center to