输送链是涂板烘炉的主要部件,其结掏如图1所示,由链板和销轴组成。其宽为353mm,展开长16380mm,材料为Cr18Ni9Ti。采用先压型后钻孔的方法加工链板弊病较多,经试验,改为先钻孔后压型的方法加工链板,效果较好。但先钻孔后压型会使φ3孔变成椭圆状,无法实现装配,故把孔扩成φ4。为便于施钻,把工艺孔也定为φ4,又在压型的阴模上镶嵌一个定 Conveyor chain is the main part of the coating oven, the knot dig as shown in Figure 1, by the chain plate and pin. Its width is 353mm, expand 16380mm long, the material is Cr18Ni9Ti. The use of the first method after the pressure-type hole processing board more ills, the test, instead of first drilling after the pressure-type processing chain plate, the effect is better. However, after the first hole drilling will make φ3 hole into an oval, can not be achieved assembly, so the hole expanded to φ4. In order to facilitate the drilling, the process hole is also set as φ4, but also inlaid on the pressure-type female mold set