What is the difference between the cutting principle of disc shears and thick foil shears?
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Author : Mr. Jiang
Update time : 2022-04-14 15:20:59
Disc shears and thick foil shears are fundamentally different in principle except for the large difference in the thickness. As the name suggests, the thick foil cutter is to cut thicker foil (the thickest is still the foil), and the thickness of the aluminum foil or copper foil is about 0.02 ~ 0.1 mm. This type of cutting originates entirely from slitting on paper rewinder or slitter. Its upper knife is a dish-shaped knife with a slightly concave center that forms a cutting angle, and the lower knife is a concave cylindrical bottom knife with a larger cutting angle. Under the action of a spring or a small air cylinder, when the disc-shaped upper knife is pressed against the plane of the cylindrical bottom knife, a shearing unit is formed. This cut has two characteristics:
1. There is no horizontal gap between the upper and lower knives, but there is lateral pressure.
2. During the shearing process, the plate does not have any support, so that the shearing force and shearing moment of the upper and lower knives cannot be balanced, thus causing damage to the edge of the strip.
These two characteristics will not have any effect on the paper sheet, because the paper sheet is basically not rigid, but it will have an effect on the thick metal foil. Therefore, for some enterprises whose cutting thickness is in the transition area of 0.05 ~ 0.1 mm, the traditional thick foil shears are gradually transformed into disc shears. Compared to thick foil shears, disc shears operate in a completely different way.
1. There is no horizontal gap between the upper and lower knives, but there is lateral pressure.
2. During the shearing process, the plate does not have any support, so that the shearing force and shearing moment of the upper and lower knives cannot be balanced, thus causing damage to the edge of the strip.
These two characteristics will not have any effect on the paper sheet, because the paper sheet is basically not rigid, but it will have an effect on the thick metal foil. Therefore, for some enterprises whose cutting thickness is in the transition area of 0.05 ~ 0.1 mm, the traditional thick foil shears are gradually transformed into disc shears. Compared to thick foil shears, disc shears operate in a completely different way.
1. The upper and lower round slitter knives have no rear angle and no lateral pressure, but there is a horizontal gap between them to accommodate the slight deformation of the edge during cutting.
2. The upper and lower sides of the sheet are basically supported by rubber stipper rings, which balance the shear force and shearing moment generated by the upper and lower knives during shearing, and avoid large deformation of the sheet.
Figure 1 is a schematic diagram of two cutting methods.
Figure 1 The main difference between the thick foil shears and the disc shears in the cutting principle
