槽深变化对矩形槽劈挤成形的影响研究

Study on forming laws of split-extruding rectangular groove with different groove depths

为初步阐明劈挤成形的一些基本规律,借助数值模拟和物理模拟方法,研究了劈分角为60°、劈刃倾角为30°的尖头劈楔,劈挤宽度为10mm、槽深范围为5～15mm的矩形槽变形过程。结果表明:槽深较小时,其变化对塌角量影响较小;槽深较大时,随着槽深增加,塌角量增加较多。起始段长度及槽口隆起最大高度均与槽深增大基本呈线性关系。槽深较小时,随着槽深增大,槽口隆起影响宽度增大较多;槽深较大时,槽深增大,槽口隆起影响宽度增大量逐步减小。槽深的改变,对槽底深度方向的影响也会增加。

In order to clarify some basic rules of splitting extrusion deformation, taking 10 mm width ot rectangular groove with the depth range of 5 to 15 mm as the research object, the deformation process of splitting extrusion by cusp splitting wedge with 60° splitting angle and 30° splitting edge angle was studied using the method of numerical simulation and physical simulation. The results show that when the depth of the groove is small, there is a smaller influence on the sunk angle length. And when the depth is larger, it gains much more quickly with the increase of the depth of the groove. The starting length and the maximum groove-side swelling height change in a linear relationship as the depth of the groove rises. When the depth of the groove is small, the influence width gains much more quickly with the increase of the depth of the groove. However, when the depth is larger, it gains slower. As the increase of depth of groove, influence depth of groove bottom also increases.