HYDRAULIC HAMMER FOR SHEET PUNCHING Russian patent published in 2010 - IPC B21J11/00 B21J9/02 B21J13/02 

FIELD: metallurgy.

SUBSTANCE: invention refers to metal pressure processing and can be applied in processing machines of sheet punching. Hydraulic hammer includes cylinder with fluid and plunger, guide tubes, falling load, table and 0.1-200 m high tubing filled with fluid up to 0.001-199.5 m height. Tubes incorporate plungers taking matrix form at top end. Falling load includes solid top platform, matrix, tensile element, middle platform, bottom platform with cavity holding two-way tensile element, two-way punch in the form of two matrices, two-way punch in the form of two puncheons, and two-way punch in the form of matrix and puncheon. Middle platform features cylindrical cavities filled with fluid or compressed air. The cavities holds plungers with top surface set against fluid or compressed air and tensile element. Plungers feature matrix at the top end.

EFFECT: enhanced precision of item punching, prolonged service life of production tools, reduced vibration and noise level.

1 dwg