Guillotine Shears

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Guillotine Shears

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STEMA PEDAX COMBILINE G Combined Cutting and Bending Machine
Herzberg am Harz
2 Bids
21,000 €
closed
PEDAX SIMPLEX AL 300 Construction Steel Shear
Herzberg am Harz
0 Bids
4,000 €
16/12/2016;13:30
WEINBRENNER TSMI 4 Guillotine Shear
Esslingen
1 Bid
3,500 €
04/01/2017;10:11
COMESSA CN 310 E Guillotine Shear
Le Poire Sur Vie
0 Bids
3,500 €
21/12/2016;14:10
FEMAS CM 200 A Plate Shear
Sestri Ponente
3 Bids
3,400 €
19/12/2016;10:37
COLGAR 3000 Plate Shear
San Bonifacio
2 Bids
850 €
19/12/2016;10:08
OMES IL CI 8 Plate Shear
San Bonifacio
1 Bid
150 €
19/12/2016;10:06
OMERA OP 100/610 Plate Shear
San Bonifacio
0 Bids
150 €
19/12/2016;10:07
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Index

  1. Guillotine shears for the separating of sheet metal
  2. From scissors to a guillotine shear
  3. Using a guillotine shear
  4. Who produces guillotine shears?
Used guillotine shear 01
Guillotine shears

Guillotine shears for the separating of sheet metal

Plate/Guillotine shears are a machine tool used to fragment sheet metal along a straight line. Fragmenting is here described as the process used for the separation of workpieces, whereby no pieces of the workpiece with a formless shape are separated from the workpiece i.e. a chipfree separation process. DIN 8588 describes six different processes used for fragmentation, but within those only
  • Chip-free method to separation metal workpieces
  • Fragmenting of sheet metal along a straight line
  • Guillotine shears are very important for the processing of sheet metal
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shearing is described as one that is suitable for sheet metal processing. Using shearing, the workpiece is cut using two knives that move in the opposite direction from one another and have a very narrow cutting gap between them. Shearing is possible with open and closed shears. Largely free formed cuts can be done using circular shears. The guillotine shears specialise in the production of long, straight cuts. They are composed out of a machine frame, upon which an upper and lower knife, as well as a lower bracket, is located. These can be hydraulically operated or by using a crank mechanism. The lower knife is fixed to the machine frame and the translational cutting movement is conducted by the upper knife.

WIEGER Guillotine shears in use
The knives can either run parallel to each other or at a small angle, so that the cut can run successively from one side of the cutting board to the other. This reduces the cutting power but the energy use remains the same. A lower bracket takes on the power of the guillotine shear that results in the blades interacting with the workpiece in a slightly staggered arrangement. This leads to the workpiece lifting up from the work table without the corresponding device. At the beginning of the cutting process, the plastic reformation of the workpiece results in cutting edges with indentations, which lie opposition to the cutting. In the following phase of the cutting process, the workpiece is sheared off. This is the single cutting phase, where a smooth cutting surface is created. During the third phase, the workpiece is ripped, which results in unevenly formed edges.

From scissors to a guillotine shear

The invention of scissors supposedly originated from the idea of using two knives sliding against one another to cut material. This past method was discovered through archaeological findings, where two similar knives were found that were predicted to be dated back to the 2nd or 3rd century. This method of using two knives most likely began earlier because, for example, the ancient Romans had real scissors (i.e. sheet metal scissors with a central pivot). Further developments of the style using a pair of knives was the invention of a type of scissor, where the two knives are hinged on one end, and spring scissors.
Used guillotine shear 02
Spring scissors are made out of a piece of metal bent into a U shape, and the middle section acts like a spring. The lengthening of the joint in the middle of the scissors has led to the modern type of scissor. This type started to be used in Europe around the 15th or 16th century.

Using a guillotine shear

The main area of application for a guillotine shear is the production of sheet metal plates. They are particularly suitable for the cutting of simple sheet metal, as well as non-ferrous metals such as aluminium, brass and bronze. Guillotine shears not very suitable for the cutting of stainless steel sheets because of their high tendency of strain-hardening, which can occur in the cutting zone due to plastic deformation. Guillotine shears allow for a cutting width of around 15 metres that can be cut in one step.

Who produces guillotine shears?

Guillotine shears are made by the manufacturers ATLANTIC, FISCHER, IRLE, RAS, SAFAN and TRUMPF.

Used guillotine shear 03
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