CS245653B1 - Shears for rolling cutting - Google Patents

Abstract

Scissors for shear cutting are usable in engineering production, especially at cutting thick-walled belts. Scissors (1) for cutting by cutting consist of a frame (2) which is provided with a bottom with a knife (5) and in which the sled is placed (3) on which the upper knife is positioned (4). The slide (3) is provided with a third pin (14) and first yoke (13). to which is one end connecting rod (12) to which it is attached the second 6ep (11) is placed at the end · Third 6ep (14) is connected to the first wheel (9) and the second isep (11) is attached to the second wheel (10) and between the first wheel (9) and the second wheel (10) is an intermediate wheel (8) in contact is disposed with Pinion Drive (7) ·

Description

(54) Roller shears

Roller-cutting shears usable in engineering production, especially when cutting thick-walled bald belts.

The scissors (1) for rolling and trimming consist of a frame (2), which is provided with a lower knife (5) and in which the slide (3) on which the upper knife is placed (4).

The slide (3) is provided with a third pin (14) and a first pin (13). to which a connecting rod (12) is connected at one end, on whose opaque end a second 6ep (11) is attached · a third 6ep (14) is connected to the first wheel (9) and a second pin (11) is connected to the second wheel (10) and between the first gear (9) and the second gear (10) is an intermediate gear (8) which is in contact with the drive pinion (7);

The invention relates to shears for cutting by rolling shearing, in particular for cutting wide thick-walled strips of sheet metal.

The ee roller shears use cutting shear, smooth cutting and easier drive design. Various shear solutions are known for rolling shear, and shears are often used, the carriage of which is provided with blades forming an arc, the cutting edge of which is rolling in a straight line parallel to the cutting edge of the lower blade. The drive of the carriage is usually by two crank mechanisms coupled to each other and the cranks rotated against each other by a certain angle. Since such a mechanism has two degrees of freedom, the carriage must be guided into the cut by means of support rollers and shaped supports. A disadvantage of such a device is the complexity and difficulty of the design of the backrests.

These drawbacks are overcome by rolling shear shears, consisting of a frame provided with a lower blade and in which there is a slide on which the upper blade is placed according to the invention. Its essence is that the sled is provided with a third Sep and a first flip, to which one end is attached to the other end of which the second is mounted, the third Sep is connected to the first wheel and the second pin is connected to the second wheel; an intermediate wheel is placed between the first wheel and the second wheel and is in contact with the drive pinion.

With such rolling shears, it is possible to provide a clear rolling movement of the upper blade, a simple drive mechanism with one degree of freedom.

The invention and its effects are explained in more detail in the description of an exemplary embodiment thereof according to the accompanying drawing, which shows schematically in a front view a rolling cutter according to the invention.

The rolling shears 1 consist of a frame 2, which is provided with a lower blade 11. In the frame 4, a slide 1 is placed on which the upper knife 8 is located. The carriage 1 is provided with a third eccentric pin 14 and a first pin 13 to which a shaft 12 is attached at one end, at the other end of which the second pin 11 is located. The third pin 14 is attached to the first wheel. a wheel 12. Between the first wheel 2 and the second wheel 10 is an intermediate wheel 6 with a driving pinion 7,

The movement to cut to cut the sheared sheet 6 is determined by the movement of the third eccentric pin 14 and the first pin 13 of the shaft. By the intermediate gear 8, the drive of the third eccentric pin 14 and the drive of the first pin 11 are coupled together. The eccentricity radius of the third eccentric pin 16 and its location, as well as the positioning of the first eccentric pin 14 and the rotation of a certain angle of the third eccentric pin 14 relative to the second crank mechanism pivot, are selected so that the trajectory of the second crank mechanism pin 11 are attached to their involutes formed by rolling the arc of the shear edges of the upper knife 4 along a line parallel to the shear edge of the lower knife 4. Thus, during editing, the eccentric center path of the eccentric aligns with its involute formed by rolling the upper knife arc 6 along a line parallel to the lower knife 1, while simultaneously centering the center pin of the first pin 12 of the crank mechanism. the pinion 2 rotates the first gear 6 with the third eccentric pin 14 and the second gear 36 to drive the crank mechanism at the same speed and in the same direction via the intermediate gear 6. Due to the kinematical coupling of the drive mechanism, the carriage and the upper knife 4 make a rolling cut. The slide 1 is guided only transversely in the frame 2 ^and retained on the third eccentric pin 14 and the first ojniee pin 14.

The rolling shears according to the invention are useful in mechanical engineering, especially for cutting wide thick-walled strips of sheet metal.

Claims (1)

SUBJECT OF THE INVENTION Roller shear shears, consisting of a frame provided with a lower knife and having a carriage on which the upper knife is located, characterized in that the carriage (3) is provided with a third pin (14) and a first pin (13) ) to which a connecting rod (12) is connected at one end, the other end (11) of which a second pin (14) is attached to the first wheel (9) and a second pin (11) is attached to the other a wheel (10) and between the first wheel (9) and the second wheel (10) is an idler (8) in contact with the driven pinion (7) "