大多数热镦模具的设计,可以分以下三种镦锻状态,用三条基本原则表述如下。 原则1。在一次镦击中,不受支承的长度不超过棒材直径的三倍时不发生弯曲。 例如图1a所示的棒材的直径A是1英时,则不受支承部分B的长度不大于3英时方能镦粗成功。这条原则,适用于任意直 Most hot upsetting die design, can be divided into the following three upsetting state, with three basic principles are as follows. Principle 1. In an upset, the unsupported length does not exceed three times the bar diameter without bending. For example, when the diameter A of the bar shown in FIG. 1a is 1 英寸, the length of the unsupported portion B is not more than 3 inches and the upsetting is successful. This principle applies to any straight