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连杆瓦压弯成形工序中,瓦料先经“弯曲”而后“墩粗”。这两个过程中压弯块由弹簧支托,见图1。工作时待料弯曲完成后,续续施加压力而随弹簧下缩的同时进入“墩粗”过程。 那么,采用多大的弹簧,才能使件料完全弯曲后再下缩呢?以往我们只是通过估计及实践中更换的方法,现我们以下述计算的方法来选取弹簧。 先计算出使件料产生弯曲时的压力: 图2为压弯过程至产生最大弯曲力时的工况状态。瓦料在弯矩最大处的截面上产生弯曲 （弯曲点为D）。
Connecting rod tile bending process, the tile material first by “bending” and then “pier rough.” The bending process of these two parts by the spring support, shown in Figure 1. Bending bending work is completed, the renewal of the pressure with the spring down while entering the “pier rough” process. So, how much spring, in order to make the material completely bent and then shrink? In the past we only through the estimation and replacement of practice, now we calculate the following method to select the spring. First calculate the pressure when the material is bent: Figure 2 is the bending process to produce the maximum bending force when the working conditions. The material is bent at the point of maximum bending moment (bending point D).