Pressure-regulating forming mold for U-shaped bend piece

The invention discloses a pressure-regulating forming mold for a U-shaped bend piece. The pressure-regulating forming mold comprises an upper mold, a lower mold and a mold handle, wherein the upper mold and the lower mold are fixedly connected through a sliding guide device, the upper mold comprises an upper template and a convex mold fixedly connected with the lower surface of the upper template, the convex mold is provided with a U-shaped punching cavity I in the vertical and radial inward direction, the U-shaped punching cavity I is used for the lower mold comprises a low template and a concave mold fixedly connected with the upper surface of the lower template, the upper surface of the concave mold is provided with a groove matched with the concave mold in the downward direction, the groove is provided with a U-shaped punching cavity II in the vertical and radial outward direction, the U-shaped punching cavity II is matched with the U-shaped punching cavity I to press the U-shaped bend piece, and the top ends of two sides of the groove of the concave mold are provided with a rolling feeding device corresponding to the U-shaped punching cavity II. By arrangement of the rolling feeding devices, the traditional sliding feeding mode can be changed into the rolling feeding mode, and a rod can be effectively prevented from being broken when the U-shaped bend piece is bent for an R angle.