Laminated metal frame jig for improving hydrostatic pressure deformation of Bar material

The utility model belongs to the field of hydrostatic pressure deformation laminated metal frame jigs, and discloses a jig for improving Bar material hydrostatic pressure deformation laminated metal frames. Comprising a base, a metal frame and a metal cover plate. The base, the metal frame and the metal cover plate are movably and detachably connected; a bulge is arranged on the base, and the length and the width of the metal cover plate are the same as those of the bulge; the metal frame is of a rectangular-ambulatory-plane structure, and the length and the width of the periphery of the metal frame are the same as those of the periphery of the base; the length and the width of the inner circumference of the metal frame are the same as those of the bulges; the height of the metal frame is higher than that of the bulge; when the metal frame is connected with the base, the metal frame covers the base, a groove structure is formed between the metal frame and the bulge, and the groove is used for placing a Bar ma