A hand-held knockout punch driver includes a housing, a motor positioned within the housing, and a head unit removably coupled to the housing. The head unit includes a draw rod to which at least one of a punch or a die is attachable.

A restraining material includes a frictional surface configured to press against an object to restrain the object and exert a frictional force thereon. The frictional surface is a pattern surface of a base material of the restraining member that will directly contact with the object. The pattern surface includes island-shaped parts separated by a depression and periodically arranged. The depression has a depth of 15 to 50 m with respect to the frictional surface. A periodic arrangement direction of the island-shaped parts includes a direction defined by that: a pattern index determined by dividing an arrangement pitch of the island-shaped parts in a periodic arrangement direction by the maximum diameter of each island-shaped part in the periodic arrangement direction falls within a range of 1.0 to 100, and the maximum diameter of each island-shaped part in the periodic arrangement direction falls within in a range of 0.1 to 2 mm.

A method for manufacturing a hot pressed product by heating a sheet material and quenching the sheet material while molding the sheet material includes a hole forming step of forming a pilot hole in the sheet material; a heating step of heating the sheet material in which the pilot hole is formed; and a molding step of forming a burred portion at the pilot hole by using a burring punch included in a die set while molding the sheet material in the die set. The pilot hole has an opening shape in which convex portions and concave portions are alternately arranged. A diameter of a circumscribed circle that is in contact with the convex portions is greater than a punch diameter of the burring punch. A diameter of an inscribed circle that is in contact with the concave portions is less than the punch diameter of the burring punch.

A punch set for use with a punch tool to punch material from a wall of an electrical box. The punch set has a punch with a cutting section, and a die defining a cavity that is configured to receive the cutting section. The cutting section may have an annular or circular portion and a plurality of keyway forming portions each extending radially from the annular or circular portion. The cutting section of the punch may be insertable into the cavity of the die in a single orientation. The die may have a protrusion receivable within a recess of the punch when the cutting section is received in the cavity. One of the die or punch may have an extension that is receivable in a single orientation within an opening in the other of the die or punch.

A hand-held knockout driver includes a main housing having a handle portion, a motor positioned within the main housing, a hydraulic assembly driven by the motor and including a reservoir containing hydraulic fluid, a secondary housing coupled to the main housing and defining a bore therein, a working piston moveable within the bore between a rest position and an actuated position, and a work zone defined between the secondary housing and the working piston into which pressurized hydraulic fluid discharged from the hydraulic assembly is received. One unit of fluid is added to the work zone to move the working piston from the rest position to the actuated position. The reservoir has a fill capacity no greater than about 1.5 units of fluid.

In a punch device (100) with a marking element (110) for marking drilled holes to be applied with positional accuracy for the purpose of the positionally accurate positioning of an object to be attached to a wall (200), in situ correctable and thus accurately definable marking of drilled holes to be inserted into a wall (200) for the attachment of objects to the wall (200) is achieved in that the marking element (110) at least for the most part is reciprocally mounted inside a housing (120), which is provided with a front positioning element (130) close to the wall provided with a central opening (131) for mounting a supporting element (150) connected to the marking element (110) for positioning the punch device (100) on a wall (200), as well as with a mounting element (140) provided with a drilled hole (141) for mounting a supporting element (150) connected to the marking element (110), which mounting element has a means for the releasable attachment of the punch device (100) to the object to be attached to the wall (200).

Provided are a protrusion forming device, a protrusion forming method, and a formed article, with which a height equal to or greater than the plate thickness is possible, the edges are sharp, and cracking can be prevented. This protrusion forming device is characterized by being equipped with a die unit provided with a die hole, and a punch unit having a large punch part with a size such that this part cannot be inserted into the die hole, and a small punch part that protrudes from the large punch part toward the die unit and can be inserted into the die hole, and characterized in that the workpiece is deformed by pressing a portion of the workpiece arranged between the die unit and the punch unit toward the die unit by means of the punch unit, thereby forming a protrusion.

A tool system is provided that has a stamp or punch adapter including eccentrically positioned stamp receptacles. This system permits a simple exchange of tool inserts in the stamp adapter. These tool inserts are also usable in another tool system. The system also permits combining the stamp adapter with a stamp shaft, which can also be used in another tool system. These features permit stamping (and punching) with minimal tooling and retooling efforts.

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 punching apparatus includes punching tools and actuators positioned above and aligned with the respective punching tools to actuate the punching tools along an operating direction so as to interact with a piece to be worked. The punching tools and the actuators are arranged side by side along at least one row. The punching apparatus includes at least one barrier optical sensor, suitable to generate a light beam that is put side by side to the row of punching tools and actuators, and reference elements, each of which is associated to a respective punching tool and/or actuator to intercept the light beam. The barrier optical sensor is arranged to detect changes in the light beam produced by one of the reference elements moving along the operating direction so as to measure a position and/or a stroke and/or a speed of a punching tool associated to the reference element.