Abstract: A power hammer with opposed movement of a ram and a bolster. The hammer has a stationary main frame accommodating, with provision for vertical displacements, a power frame. A bolster supporting a blank is attached to the power frame. Also, attached to the power frame is an actuating cylinder provided with a space above its piston serving as a gas chamber, a space below its piston filled with a fluid, and a piston rod carrying a ram with a top die. The hammer also incorporates a mechanism for accelerating the power frame by an additional force equal to, or exceeding by a specified amount, its weight. The mechanism includes spaces provided in the lower portion of the power frame and communicating with the space below the piston of the actuating cylinder, as well as vertical plungers extending inside each of the lower portion spaces and resting on the main frame.

Abstract: The invention relates to metal forming equipment. In the hammer according to the invention, an explosion device is provided with a check valve to establish communication of the inner space of the casing of the explosion device with the explosion chamber and to close the explosion chamber after a blow-up of granular explosive. The casing of the explosion device is mounted in a load-bearing frame for axial adjustment to vary the volume of the explosion chamber. This construction enables the amount of charge of granular explosive, hence the impact energy of blow of the upper die against the blank to be varied over a wide range thus resulting in considerable enlargement of manufacturing capabilities of the hammer.

Abstract: The invention relates to metal forming equipment and may be most advantageously used for the manufacture of single-tailed blades preferably for gas turbine engines. The hammer according to the invention has a stationary bed incorporating a load bearing frame carrying a lower die and a hammer cylinder. The hollow piston rod of the hammer cylinder accommodates a hammer body with an upper die, and its upper chamber is an explosion chamber. The invention resides in that the hammer body is mounted in the inner space of the hollow piston for an independent axial movement relative thereto under the action of a hammer piston arranged thereabove in the same inner space. The hammer piston is caused to move by pressure of gases released upon a blow-up in the explosion chamber. The chamber communicates with the inner space of the piston rod through a central opening of the piston. This construction considerably enlarges the manufacturing capabilities of the hammer according to the invention.