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The machine consists of a shear table, work-holding device, upper and lower blades, and a gauging device. The shear table is the part of the machinery that the workpiece rests on whilst being shorn. The work-holding device is used to hold the workpiece in place and keep it from moving or buckling while under stress. The upper and lower blades ...
Shearing, also known as die cutting, [1] is a process that cuts stock without the formation of chips or the use of burning or melting. Strictly speaking, if the cutting blades are straight the process is called shearing; if the cutting blades are curved then they are shearing-type operations. [2]
An alligator shear, historically known as a lever shear [1] and sometimes as a crocodile shear, [2] is a metal-cutting shear with a hinged jaw, powered by a flywheel or hydraulic cylinder. Alligator shears are generally set up as stand-alone shears; however, there are types for excavators. The jaw size can range from 4 to 36 in (100 to 910 mm ...
Other common blade patterns include the circle pattern or curved pattern and the hawk's-bill pattern. Circle pattern snips have a curved blade and are used to cut circles. Hawk's-bill snips are used to cut small radii on the inside and outside of a circle. The shape of the blades allow for sharp turns without buckling the sheet metal.
Pedal-powered grinding machine, Russia, 1902. A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding. It is a type of material removal using an abrasive wheel as the cutting tool. [1] Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.
This particular machine stands over 6 ft (1.8 m) tall and can shear, notch, and punch precision holes in plate steel up to 5/8 in (15 mm) thick. An Ironworker is a class of machine that can shear, notch, and punch holes in steel plate and profiles. Ironworkers generate force using mechanical advantage or hydraulic systems. [1]
In order to produce the cabinets, Parker Mfg. Co. needed a sheet-metal shear and a press. Due to the war, machine tool manufacturers were backed up with orders so far that two-year delivery times were not uncommon. However, the company had Harold Verson, who had been chief engineer in his family's machine-tool manufacturing business in Chicago.
Machine tools filled a need created by textile machinery during the Industrial Revolution in England in the middle to late 1700s. [8] Until that time, machinery was made mostly from wood, often including gearing and shafts. The increase in mechanization required more metal parts, which were usually made of cast iron or wrought iron. Cast iron ...
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