A notching device includes a base, a stand, a lever assembly, and a notching assembly. The base and stand are coupled together. The lever assembly is coupled to the stand and the notching assembly. The notching assembly includes a die set. The die set has a two-tier upper shoe and a lower shoe. The two-tier show has a first tier and a second tier separated by a gap and the lower shoe includes a notch. The two-tier upper shoe fits within the lower shoe.

A cutting head for a power tool. The cutting head includes a first jaw having a first blade mounting surface and a second jaw having a second blade mounting surface. The second jaw is rotatably coupled to the first jaw. The cutting head also includes a first blade removably coupled to the first blade mounting surface of the first jaw and a second blade removably coupled to the second blade mounting surface of the second jaw. A first cutting edge of the first blade is substantially co-planar with a second cutting edge of the second blade. During a cutting action, the first jaw and the second jaw rotate with respect to one another to bring the first cutting edge closer to the second cutting edge.

A pneumatic tool for joining steel decking includes a pneumatic actuator assembly which drives a push rod. The push rod is coupled to a linkage assembly including a rocker link having one end coupled to the frame of the tool, a punch arm having one end coupled to the frame, and a coupler link rotatably coupled to both the rocker link and the punch arm. At the bottom of the tool, a punching mechanism is formed. A trigger mechanism releases a flow of pressurized air into the actuator assembly, thereby driving the push rod out of the housing of the actuator assembly. Movement of the push rod causes the rocker link to rotate about a joint link, thereby driving the coupler link toward the punch arm and causing the punch to rotate about the joint link and mate with the fixed die.

A pneumatic tool for joining steel decking includes a pneumatic actuator assembly which drives a push rod. The push rod is coupled to a linkage assembly including a rocker link having one end coupled to the frame of the tool, a punch arm having one end coupled to the frame, and a coupler link rotatably coupled to both the rocker link and the punch arm. At the bottom of the tool, a punching mechanism is formed. A trigger mechanism releases a flow of pressurized air into the actuator assembly, thereby driving the push rod out of the housing of the actuator assembly. Movement of the push rod causes the rocker link to rotate about a joint link, thereby driving the coupler link toward the punch arm and causing the punch to rotate about the joint link and mate with the fixed die.

Methods, devices, and systems for multiple-stroke slotting of planar workpieces are provided. The methods include positioning a workpiece relative to a slotting tool having a punch and a die, moving the punch and the die relative to one another, moving the slotting tool and the workpiece relative to one another, slotting a workpiece by a slot length during a sectioning slot stroke and at least one subsequent slotting stroke in a sectioning phase, and performing strokes in form of slotting strokes and at least one trimming stroke during the relative movement of the punch and the die in a working phase. The subsequent slotting stroke is performed prior to the trimming stroke, and the slot length exceeds a maximum attainable slot length during the trimming stroke. The workpiece and the slotting tool are moved relative to one another by at least one feed movement between the strokes.

Provided is a technique capable of inexpensively working a steel sheet. A method for working a workpiece with an apparatus for working a workpiece, includes: a drawing step for performing drawing with a drawing device having an upper die and a lower die; and a cutting step for cutting the drawn workpiece with a cutting device having nibblers. The nibbler has a cylindrical case, a punch housed in the case, which reciprocates in a top-bottom direction to punch the workpiece, and a die arranged below the case, the die having a die hole into which the punch enters, and an ejecting hole communicating with the die hole, through which a scrap is ejected. The nibbler trims the workpiece fed between the case and the die.

Provided is a technique capable of inexpensively working a steel sheet. A method for working a workpiece with an apparatus for working a workpiece, includes: a drawing step for performing drawing with a drawing device having an upper die and a lower die; and a cutting step for cutting the drawn workpiece with a cutting device having nibblers. The nibbler has a cylindrical case, a punch housed in the case, which reciprocates in a top-bottom direction to punch the workpiece, and a die arranged below the case, the die having a die hole into which the punch enters, and an ejecting hole communicating with the die hole, through which a scrap is ejected. The nibbler trims the workpiece fed between the case and the die.

A pneumatic tool for joining steel decking includes a pneumatic actuator assembly which drives a push rod. The push rod is coupled to a linkage assembly including a rocker link having one end coupled to the frame of the tool, a punch arm having one end coupled to the frame, and a coupler link rotatably coupled to both the rocker link and the punch arm. At the bottom of the tool, a punching mechanism is formed. A trigger mechanism releases a flow of pressurized air into the actuator assembly, thereby driving the push rod out of the housing of the actuator assembly. Movement of the push rod causes the rocker link to rotate about a joint link, thereby driving the coupler link toward the punch arm and causing the punch to rotate about the joint link and mate with the fixed die.

A pneumatic tool for joining steel decking includes a pneumatic actuator assembly which drives a push rod. The push rod is coupled to a linkage assembly including a rocker link having one end coupled to the frame of the tool, a punch arm having one end coupled to the frame, and a coupler link rotatably coupled to both the rocker link and the punch arm. At the bottom of the tool, a punching mechanism is formed. A trigger mechanism releases a flow of pressurized air into the actuator assembly, thereby driving the push rod out of the housing of the actuator assembly. Movement of the push rod causes the rocker link to rotate about a joint link, thereby driving the coupler link toward the punch arm and causing the punch to rotate about the joint link and mate with the fixed die.