xxx体育馆网架工程施工组织设计.doc

制孔
螺纹孔及平面加工应按铣平面→钻螺纹底孔→倒角→丝锥攻螺纹过程加工，螺纹孔经抗拉强度检验合格后方能安装使用，螺栓球标记打在基准孔平面上。
加工螺纹孔及平面设备：使用加工中心机床或采用车、钻、镗、铣床配以专用工装，所用的专用工装，其转角误差不得大于10'。
螺纹孔及平面采用一次装夹加工，采用分工序加工时，必须有可靠的
铣削平面：设计图规定的削平面数值不作测量用，而保证球中心至球平面距离尺寸精度。

焊接要求

2、操作工艺：
⑴、焊条使用前，必须按照质量证明书的规定进行烘焙，低氢型焊条经过烘焙后，应放在保温箱内随用随取。
⑵、首次采用的钢种和焊接材料，必须进行焊接工艺性能和物理性能试验，符合要求后才采用。
⑶、多层焊接应连续施焊，其中每一层焊道焊完后应及时清理，如发现有影响焊接质量的缺陷，必须清除后再焊。
⑷、要求焊成凹面的贴角焊缝，可采用船位焊接
System holes
Threaded hole and the plane processing should be threaded bottom hole drilling milling plane → → → chamfering processing tap tapping procedure, the tensile strength test screw hole after passing through can only installation, bolt holes in the base hit the ball marker plane.
Threading hole and surface equipment: machine tools or machining centers used by trucks, drilling, boring, milling accompanied by special tooling, special tooling used, the angle error is no larger than 10 '.
Threaded hole and a clamping surface processing by using the sub-process machining, there must be reliable
Milling plane: Plane cut under design value without measurement, and ensure that the horizontal distance between the ball center to ball size precision.

Welding requirements

2, the operation process:
⑴, electrodes before use, a certificate must be in accordance with the provisions of baking quality, low-hydrogen type electrode after baking, it should be placed in an incubator with the use with the check.
⑵, first used in steel and welding materials, welding technology and the need for the physical performance test, to meet the requirements before using.
⑶, multi-layer welding should be continuous welding operation, each layer of weld metal should be cleared up After welding, the welding quality is found You Yingxiang defects must be removed before welding.
⑷, required welding paste into the concave fillet weld, welding can be used ship's position