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WE ARE ONE OF THE OLDEST MACHINERY BROKERS IN DUBAI BUYING AND SELLING INDUSTRIAL, MACHINE SHOP AND SHEET METAL PROCESSING MACHINES . WE HAVE BEEN IN THE MARKET FOR ALMOST 40 YEARS AND HAVE BOUGHT AND SOLD SEVERAL HUNDRED MACHINES AND PIECES OF PLANT AND EQUIPMENT. WE BUY LATHE MACHINES, SHAPER MACHINES, MILLING MACHINES, PLATE BENDING ROLLS, PLATE ROLLING MACHINES, PRESS BRAKES, BRAKE PRESSES, SHEARING MACHINES, GUILLOTINES, IRON WORKERS, NOTCHING MACHINES, HYDRAULIC PRESSES, MECHANICAL PRESSES, STROKE PRESSES, FORGING PRESSES, STAMPING PRESSES, DEEP DRAWING PRESSES, ALWAYS HAVE A LARGE SELECTION OF LATHE MACHINES, SHAPER MACHINES, MILLING MACHINES, SHEARING MACHINES, BRAKE PRESSES, MECHANICAL PRESSES, HYDRAULIC PRESSES, SURFACE AND CYLINDRICAL GRINDERS, EDM’S AND RADIAL DRILLS IN STOCK. WE ALSO ARRANGE BUYING AND SHIPPING OF USED MACHINERY FROM EUROPE, AMERICA AND CANADA FOR OUR CUSTOMERS IN DUBAI, SHARJAH AND ABU DHABI, U.A.E TALK TO YOUR TRUSTED MACHINERY BROKERS IN DUBAI
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There are four major methods used to shape sheet metal:
The first step in fabricating a sheet metal component is cutting to size. Shearing machines and shearing machinery perform this function. Shearing machines are multipurpose devices used in the cutting of alloys and other sheet metal. Some shearing machines use a scissor-like, angular shear action to cut metal into sheets or strips. Other, larger machines use a straight shear action with the blade fixed at an angle as opposed to the angular movement. Shearing operations are performed by the action of two blades, one fixed in the shear bed and the other moving vertically with little or no clearance. Shear action moves progressively from one side of the material to the other. The angular configuration of the blades is called the rake. Both rake and clearance are a function of the type and thickness of the material to be cut. In press type shears, the upper blade is inclined in relation to the lower blade, about .5 to 2.5 degrees. The typical shear consists of a fixed bed to which one blade is mounted, a vertically advancing crosshead and a series of hold-down pins or feet that hold the material in place while the cutting occurs. A gauging system with stops is used to produce specific workpiece finish sizes.
There are several types of shearing machines that can be used to meet your specific job needs.
- Air/pneumatic shears use a pneumatic cylinder to power the crosshead and upper blade.
- Hydraulic shears are driven or powered by a hydraulic cylinder. Hydraulic presses can generate extremely high forces to cut metals or other materials.
- Hydromechanical shears are driven by a hydraulic cylinder or hydraulic motor.
- Mechanical shears have the moving blade driven by a rotary motor through a screw, toggle, lever, or other mechanism.
- Servo driven shears are driven by a direct connection to a servo motor.
- Manual shears are driven or powered by hand or with manual force that is magnified with screw, lever, or other mechanism.
Capacity/operating force is the operating press load required to cut a part during production. The rated capacity of a press is the pressure, in tons, that the slide or ram will safely exert at the bottom of the stroke while working within the range of the press. Stroke is the ram travel from top dead center (TDC) to bottom dead center (BDC). Stroke speed is the linear speed of the slide or ram during pressing or ram advancement steps.