Shear devices play an important role in the sheet metal manufacturing industry, so naturally, there are a plethora of machines designed to perform the many different shearing functions required to achieve a smooth and accurate finish. This week, we take a look at seven of the most common types of shearing devices used in the sheet metal manufacturing industry, including the metal guillotine. NC Shearing Machine
Alligator shear
So-called because of the hinged jaw used to cut metal, alligator shears are powered by a hydraulic cylinder and are mostly used for cutting long metal stock like l-beams, angle iron, pipe or rebar, or to prepare scrap metal for shredding by lopping off anything the shredder will not accept or non-metal fittings.
The cutting motion is actuated by a piston which extends to slowly close the upper ‘jaw’ down alongside the bed. The key strengths of an alligator shear are its cost-effectiveness, strength and durability, it’s drawbacks are its inaccuracy and rough finish.
# 2: Metal guillotine
The guillotines consist of a cutting table, a workpiece clamping device, a measuring device and upper and lower shears. It can operate mechanically, hydraulically or by foot, by clamping the metal with a ram and then moving the metal blade to a specific cutting blade. The movable blade can straight when placed at an angle to reduce the amount of force required to cut a larger piece of metal.
The main advantages of working with a metal guillotine include its speed and economy, which is ideal for large-scale production. However, the biggest disadvantage of a metal guillotine is its tendency to form a rough edge. These machines are ideal for parts of the process where aesthetics are not important or where the metal will continue to work more by welding. When working with the guillotine, always make sure that you use the correct safety precautions.
3: Cut the bank
The table shear, which offer more mechanical advantages thanks to the composite mechanism, are ideal for cutting rough shapes from medium-sized pieces of sheet metal. Table shears, a dynamic machine, can be used for many different purposes, including 90-degree cutting and T-profiles, such as cutting circles and square beams.
The strength of the shears depends on their size, they can withstand the highest stresses on larger machines, but overall, the main advantages of this shearing mechanism are its efficiency and the ability to make clean cuts without burrs.
4: Power Cut
Electric shears, ideal for whitening large pieces of sheet metal, are electrically or pneumatically operated and manually operated. They work with a long blade, which moves to a low fix blade and strains the cutting material. It is usually use for cutting straight lines. As curves with large radii.
The main advantage of electric shears is their flexibility in cutting curves, efficiency, accuracy, strength, and quality design.
5: Cut off the throat
Ideal for making straight, intricately curve or irregular cuts, the neckless shed differs from the other models in this list because the design allows the cutting material to move freely.
6: Fragments
Shears are hand tools used to cut sheet metal. There are two different types of scissors: thin scissors and compound scissors. Tin scissors have long handles and short blades. And used to cut low carbon tin or mild steel. Straight patterned sheet metal shears are great for cutting straight lines such as soft curves, while duckbill patterned sheet metal shears are great for cutting sharp curves. There are also think tanks known as circular patterns that cut circles, hawk patterns that cut radii inside and outside the circles, and also cuts that require sharp bends, such as cutting holes in wires. . Another type of scissors is a composite knife. Which use to cut aluminum. Mild steel or stainless steel. This type of scissors has a clutch that adds mechanical benefits. Excerpts for compound actions come in three different types:
Straight cutting (straight and wide arc cut);
Cutting on the left (cut on the right and tightly curved on the left); en
Cut to the right (cut straight and tightly to the right).
Other design differences in the composite action include:
Straight scissors, easy to use in tight spaces;
Long scissors, great for longer straight cuts; en
Hard shears with a surface-treated blade can use to cut harder metals.
The main advantage of these scissors is their accuracy and suitability for a wide range of dangerous cutting work. However, because it operate manually. Working with scissors is a difficult and time-consuming process.
7: Pieces
Although some bites work like cans, most trade in the formation of punches and dice. The pruners work with a blade that moves in a row around a particular die in a series of strokes up and down and “cuts” the material to create a wound.
The advantages of punches include their strength and durability, the ability to make cuts without deformation, speed and low feed.
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