Disclosed are pliers and related methods for punching a hole in a non-flat material without distorting the material. Such pliers may comprise a first member having a first handle and a first jaw, and a second member having a second handle and a second jaw. The first and second members are attached at a connection point to permit pivoting in response to a squeezing force on the handles. The first jaw comprises a punch tip to be received by the second jaw, where the punch tip may have an angled distal end truncating a cross-section of the punch tip. The second jaw comprises a shaped edge facing the punch tip and extending along a length of the second jaw, the shaped edge having substantially the same shape as the non-flat material and comprising an opening having substantially the same shape as the cross-section of the punch tip and to receive the tip therein.

Disclosed are pliers and related methods for punching a hole in a non-flat material without distorting the material. Such pliers may comprise a first member having a first handle and a first jaw, and a second member having a second handle and a second jaw. The first and second members are attached at a connection point to permit pivoting in response to a squeezing force on the handles. The first jaw comprises a punch tip to be received by the second jaw, where the punch tip may have an angled distal end truncating a cross-section of the punch tip. The second jaw comprises a shaped edge facing the punch tip and extending along a length of the second jaw, the shaped edge having substantially the same shape as the non-flat material and comprising an opening having substantially the same shape as the cross-section of the punch tip and to receive the tip therein.

A hand-held knockout driver includes a main housing having a handle portion, a motor positioned within the main housing, a pump assembly driven by the motor, and a secondary housing coupled to the main housing and defining a bore therein. The hand-held knockout driver also includes a working piston moveable within the bore from a rest position to an actuated position to define a piston throw distance therebetween. The hand-held knockout driver also includes a draw stud coupled to the working piston, a die coupled to the secondary housing, and a punch coupled to the draw stud opposite the working piston for movement therewith relative to the die. The die has a depth greater than the piston throw distance.

A forming method of a disk-shaped member in which a plate formed into a disk shape and a protruded flange protruding from an outer periphery of the plate are integrally formed, includes: forming a preformed body from a plate member by a press forming, the preformed body having a protrusion in an outer periphery of the plate, the protrusion having a width larger than a width of the flange; and forming the flange by cutting and removing an outer peripheral surface side of the protrusion to punch the preformed body from the plate member in a state where a mold is in contact with an inner peripheral surface of the protrusion and a portion connected to a root of the protrusion.

A forming method of a disk-shaped member in which a plate formed into a disk shape and a protruded flange protruding from an outer periphery of the plate are integrally formed, includes: forming a preformed body from a plate member by a press forming, the preformed body having a protrusion in an outer periphery of the plate, the protrusion having a width larger than a width of the flange; and forming the flange by cutting and removing an outer peripheral surface side of the protrusion to punch the preformed body from the plate member in a state where a mold is in contact with an inner peripheral surface of the protrusion and a portion connected to a root of the protrusion.

A punch tip design configured to be universal in its application with wide varieties of punch assemblies, and various punch body designs from which universal application of the punch tip is exemplified. In some cases, ancillary components used with the various punch body designs enhance ease by which the operator can selectively manipulate the same for alternately securing or releasing the punch tip.

A punch tip design configured to be universal in its application with wide varieties of punch assemblies, and various punch body designs from which universal application of the punch tip is exemplified. In some cases, ancillary components used with the various punch body designs enhance ease by which the operator can selectively manipulate the same for alternately securing or releasing the punch tip.

Various designs of die shoe assemblies are provided, each assembly configured to adjust vertical positioning of a die platform within the assembly, in order to correspondingly adjust vertical positioning of a die used with the assembly. The assemblies address limitations often associated with conventional die shoes designed to be used with shims. The assemblies use various methods and corresponding mechanisms to make the adjustment a time efficient process, while in so doing also enabling the desired extent of adjustment to be effectively and accurately provided.

A punch die includes: a punch body including a punch edge portion at a lower end portion along an axis, a key projecting from an outer periphery, and a punch driver at an upper portion along the axis; a punch guide including an inner hollow elongated along the axis and receiving the punch body to be movable along the axis, and a keyway formed on an internal periphery of the inner hollow to extend along the axis and mesh with the key; a retainer collar rotatably combined with the punch guide at an upper end along the axis and around the axis, the punch driver passing through the retainer collar to be movable along the axis; and a punch head screwed in an upper end portion along the axis of the punch driver to regulate a position of the punch driver.

A punch die includes: a punch body including a punch edge portion at a lower end portion along an axis, a key projecting from an outer periphery, and a punch driver at an upper portion along the axis; a punch guide including an inner hollow elongated along the axis and receiving the punch body to be movable along the axis, and a keyway formed on an internal periphery of the inner hollow to extend along the axis and mesh with the key; a retainer collar rotatably combined with the punch guide at an upper end along the axis and around the axis, the punch driver passing through the retainer collar to be movable along the axis; and a punch head screwed in an upper end portion along the axis of the punch driver to regulate a position of the punch driver.