The present invention provides a method and apparatus of reducing current requirements by increasing resistance of the blade structure by reducing the cross sectional area of at least one section of the blade so that the electrical current requirements for heating of the blade to cutting temperature are reduced wherein the power supply and substantially entire unit may be mounted within a hand held unit. Methods of shaping blades to perform various heat distributions for specialty blades for custom cutting are disclosed. Further, an improved blade mounting structure is provided which includes structure for maintaining the legs of the blade parallel to the direction of cut and provides for easy insertion of new blades by maintaining a slotted blade cradle stable and in alignment with the blades and a clamp member away from the blade when the clamp mounting structure is loosened.

A portable, non-power operated cutting tool for cutting siding materials in a straight fashion without splintering or cracking. The cutting tool including a base with a cutting platform rotably connected to the base allowing the cutting platform to be set to cut siding at a range of angles from 0 to 180.

A slitting machine for threading scrap material includes first and second arbors; rotary knives disposed on each of the first and second arbors; and a pair of notching modules positioned on opposite ends of the first and second arbors. The notching modules each has a pair of shear knives for making multiple cuts in a strip of material passing through the slitting machine forming notches to enable threading of material to scrap chutes from the slitting machine.

A push-breaking device has: a placement stand; a pressing mechanism; and at least one cutting blade tool. By the cutting blade tool, which moves along a first direction with respect the placement stand, the device pushes and bends, and breaks, a portion of a protruding region, which protrudes outward from the placement stand and the pressing mechanism, of the layered electrode sheet, which is pressed by the pressing mechanism in a second direction. An angle of a blade portion of the cutting blade tool with respect to the second direction is 15-30. An angle of the blade portion with respect to the first direction is an acute angle. A length, in the second direction, of a clearance between the blade portion and an end, at the cutting blade tool side, of the placement stand is 10%-35% of a length of the layered electrode sheet in the first direction.

A shearing tool for shearing a strut channel includes a housing, a drive casing coupled to the housing, an output movable along a longitudinal axis relative to the drive casing between an extended position and a retracted position, and a die. The die includes a front face, a rear face opposite the front face, and a cutout extending through the front and rear faces, the cutout configured to receive the strut channel therethrough. A die retaining mechanism is movable between a locked configuration, in which the die retaining mechanism couples the die to the output for movement therewith between the extended position and the retracted position, and an unlocked configuration, in which the die is removable from the drive casing. The die retaining mechanism is movable from the locked configuration to the unlocked configuration without the use of tools.

A hydraulic tool cutting dies including first and second cutting dies. The first cutting die has a first mounting section and a first cutting edge. The first mounting section is sized and shaped to removably attached to a hydraulic tool. The second cutting die has a second mounting section and a second cutting edge. The second mounting section is sized and shaped to removably attached to the hydraulic tool. The first cutting die includes a post extending past the first cutting edge and the second cutting die includes a post receiving area which has a different cross-sectional shape than the post.

A fin manufacturing apparatus includes an inter-row slit processing device having upper and lower blades with blade edges extending in a feed direction of a thin metal plate that serves as a material of a fin. The upper and lower blades are engaged with each other to form a perforated slit between rows on the fin. Each blade has a recess where the blade edge is partially recessed toward a ridge. Recess depth dimensions are smaller than a lapping amount of the blades when the blades are engaged with each other. At least one of the blades is slidable in a longitudinal direction of the blade edge to allow the recesses to be moved from overlapping positions to adjacent positions as viewed along a direction orthogonal to the longitudinal direction of the blade edges when the blades are engaged with each other over the lapping amount.

In a first stage or operation, at least one shear initiation breakthrough opening is formed through the ultra-high strength material sheet at an interior location. A leading terminal end of each of at least two inclined shearing edges of an interior opening shearing tool is positioned in the at least one shear initiation breakthrough opening. The interior opening shearing tool is different from the breakthrough opening forming tool. In a second stage or operation, shearing of the material is initiated from the at least one shear initiation breakthrough opening by advancing the at least two inclined shearing edges of the interior opening shearing tool against the ultra-high strength material sheet and relative to a corresponding shearing tool.

A device for changing a blade on shears, in particular for a rolled band, and to such shears in which a blade can be fixed to at least one blade support automatically by a tie bar pretensioned by a force accumulator. The device includes at least one adjusting element which can be actuated in order to release the blade from the blade support such that the tie rod is moved in an axial direction against the tie rod pretension. The adjusting element can be arranged on an outer face of the blade support or outside of the blade support.

A variable rake shear comprises a housing (8), a first blade (1) mounted in a first blade mounting (4), a second blade (2) mounted in a second blade mounting (3); and a control device (5) to control movement of one blade mounting to shear the material. Each blade mounting is movable in at least one dimension relative to the housing. One blade is an active blade (1) and the other blade is a passive blade (2). A rake adjustment mechanism (6a, 6b) for at least one of the mountings (3, 4) and the mounting (4) for the active blade (1) has a torque tube linkage mechanism (10, 11, 12).