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要冲制精确的U形或V形板零件,通常使用凹模为铰链式的弯曲模[1—4]。目前这种模具有两种基本形式(图1)。由图不难看出,在这种模具上,板料的弯曲是靠作用到零件弯曲部分整个面上的半模平面压力来实现,与其他方法不同,在弯曲的整个过程中,凹模和板料始终保持接触。同时,在单角弯曲的情况下,凸模和板料仅在弯曲区内以一窄条保持接触;而在双角弯曲的情况下,凸模和板料在凸模整个端面部分保持接触。 这样,使用这两种弯曲方法,板料的弯
To punch precise U-shaped or V-shaped plate parts, usually use the die as a hinged bending mode [1-4]. The current mold has two basic forms (Figure 1). Not difficult to see from the figure, in this mold, the sheet is bent by the role of bending parts of the entire surface of the half-plane pressure to achieve, and other methods, in the entire process of bending, the die and the plate Always keep in touch. In the meantime, in the case of a single-angle bend, the punch and the sheet material are held in contact with each other by a narrow strip only in the bending region, while in the case of double-angle bending, the punch and the sheet are kept in contact with the entire end face portion of the punch. In this way, using both bending methods, sheet bending