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在鍛造生产中,拔長是最基本的工序,也就把毛坯的横断面积减小,使長度得到增加的一种工序,有的同志把它叫做“延伸”“捛细”或“甩細”。拔長的种类 1.拔長:將毛坯沿長度方向进料,在平的或者缺口的砧座上依次鍛压,同时繞軸心翻轉,逐步把毛坯的横断面积减小。这是最常用来鍛造軸类鍛件的拔長方法,如图1所示。 2.輾平:將毛坯沿長度方向进料,在平的砧座上依次鍛压,不必繞軸心
In forging production, drawing is the most basic process, it also reduces the cross-sectional area of the blank, so that the length of an increase in the process, and some comrades called it “extended” “thin” or “fine” . Pull out the type of 1. Long: the blank along the length of the feed, in the flat or notched anvil in turn forging pressure, while turning around the axis of the gradual reduction of the cross-sectional area of the blank. This is the most commonly used method of forging shaft length forging method, shown in Figure 1. 2. Rolling: the blank along the length of the feed, followed by forging on a flat anvil, without having to around the axis