论文部分内容阅读
据笔者的实践经验证明,造成预应力砼多孔板表面平整度差的主要原因有:(1)台座(长线台座台面)不平;(2)钢模抽芯管不直;(3)灰浆控制不稳定;(4)操作人员找平不认真。要想控制预应力砼多孔板的平整度,首先要求长线台面表面平整,其误差不超过±2mm;要经常检查抽芯管的平直度;加强操作人员的质量意识教育。与此同时,还可在模具上设置一些控制平整度的装置(见图)。最简单的方法是在钢拉模内模侧挡板上焊两个φ12的钢筋套环,形状为“几”形,套环两边各为100mm,中间R为30mm。在套环处穿一根φ50的钢管,长约800mm。当砼成型抽内芯时,钢管随内模碾压砼表面向前拖移,内模拉出后,表面凹凸部分大体碾平,不需要人工再作精光处理。
According to the author’s practical experience, the main reasons for the poor flatness of the pre-stressed porous plate are as follows: (1) The pedestal (long line pedestal table) is uneven; (2) The steel core tube is not straight; (3) The mortar control is not Stability; (4) Operators are not leveling properly. In order to control the flatness of the pre-stressed crucible porous plate, the surface of the long wire table must first be flat, the error should not exceed ±2 mm; the straightness of the core tube should be inspected frequently; and the quality awareness education of the operators should be strengthened. At the same time, some flatness control devices can also be set on the mold (see figure). The simplest method is to weld two φ12 steel reinforcement rings on the side plates of the steel die, the shape of which is “several”, with 100 mm on each side of the collar and 30 mm in the middle. Wearing a φ50 steel pipe at the collar, about 800mm. When forming the inner core of the pump, the steel tube is dragged forward along with the inner mold lamination surface. After the inner mold is pulled out, the surface roughness is roughly flattened, and no artificial refinishing treatment is needed.