管坯成形长度对制件形状的影响表现为成形长度增加，制件中部圆筒状长度也增加，而端口部均呈尺寸大致相同的锥形或喇叭形。

The cylindrical length of middle tube becomes increased with formed length, but the edge profile of the tube almost keep the same cone or bell shape.

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管坯成形长度对制件形状的影响表现为成形长度增加，制件中部圆筒状长度也增加，而端口部均呈尺寸大致相同的锥形或喇叭形。

The cylindrical length of middle tube becomes increased with formed length, but the edge profile of the tube almost keep the same cone or bell shape.

youdao