SU1038107A1 - Shears for cutting sheet - Google Patents

Abstract

SCISSORS FOR CUTTING THE SHEET, containing a frame with a fixed knife fixed on it, a knife beam with an upper knife with a roll cut, 1038107 A 3

Description

The invention relates to the processing of metals by pressure, in particular to equipment for cutting, and can be used at the cutting sites of sheet mills, as well as for cutting the sheet in the preparation shops. The closest to the proposed technical essence and the achieved result are scissors for cutting a sheet, containing a frame with a knife fixed on it, a knife beam with an upper knife with a roll cut, a crank shaft with a connecting rod and a slider mounted on an axis fixed in knife beam, and installed in the bed guides. In the known scissors, the connection between the knife beam and the frame is carried out by a slider fixed on the axis in the knife beam and moving in the guide beds. suitable only for slitting shears. For shears, cross-cutting, such a path is unsuitable, as creep prevents the passage of the sheet. In addition, yes, the design is complex in structure, laborious and unreliable in operation. The disadvantage of scissors is also not the rational use of rolling motion and crank shafts, since the cut is made only by rolling to one side and turning the cranks to ZbO. The purpose of the invention is to reduce the size, reduce the drive power and provide two-sided cut. This goal is achieved by the fact that scissors for cutting a sheet, containing a frame with a fixed knife fixed on it, a knife beam with a flat knife with a rolling cut, a crank shaft with a connecting rod and a slider mounted on an axis fixed to the knife beam, and installed in guide beds, equipped with a cam, mounted on a knife beam, made with a cylindrical surface parallel to the edge of the upper knife, and a beam with a horizontal surface mounted on the bed, while the copier is installed with a cable f} It acts with a horizontal surface of the beam and is pressed to the latter by means of a power cylinder. Figure 1 shows the proposed, scissors, front view; figure 2 - section aa in figure 1; Fig. 3 shows BB in Fig. 1; figure 4 - section bb In figure 2; Fig. 5 is a diagram of the operation of scissors at different positions of the upper knife. The shears consist of a bed 1 and a knife beam 2 connected by a connecting rod 3 with a crank shaft 4. A fixed straight linear knife 5 is fixed on the bed, and a knife 6 with a radial shape of the cutting edge is fixed on the bed beam 2. The bed 1 consists of a table 7 and two racks 8, interconnected by a cross beam 9 and a beam 10. On the knife beam 2, two similar copier 11 are fixed, having a cylindrical surface 12 parallel to the cutting edge of the upper knife. The copier 11 rolls along the horizontal surface 13 of the crosspiece 9 and the beam 10, mounted on the bed 1 of the scissors. The copier 11 is constantly pressed against the traverse 9 and the beam 10 by the power cylinder 14, for example a hydraulic cylinder. The housing of the hydraulic cylinder 14 is installed in the yoke 9 on the axis 15, and the plunger through the axis 16, on which the connecting rod 3 is mounted, is connected to the knife beam 2. The hydraulic cylinder 14 is non-consumable because it is connected to a battery (not shown) and when the plunger moves up It does not contain the working fluid in the battery and, when it moves downwards, takes it out of the battery. The crank shaft 4 is connected with an engine (not shown). In the middle of the circle, forming a cylindrical surface 12, there is an axis 17, on which slides 18 are mounted, placed in guides 19 traverses 9 and beams 10. Scissors work as follows. Before cutting, the knife is raised, the plunger of the hydraulic cylinder 14 is in its extreme upper position (Fig. 5a). When the engine is turned on, crank 4 begins to rotate and through the connecting rod 3 moves knife blade 2, and surface 12 of copier 11 begins to roll along surface 13, while this upper movable knife 6 also reproduces the rolling motion and cuts sheet 20 (Fig. 56c). In the rolling process, the sliders 18 move in the direction of 19 of them. The hydraulic cylinder constantly presses the copier 11 to the traverse 9 and the beam 10, and its plunger in the first half of the stroke

moves down and the second up. During the rotations of the crank shaft, the sheet is cut into TbO. The top knife is prepared for cutting the next sheet. The next sheet is cut when rolling, knife 6 in the opposite direction.

The proposed scissors have the best performance on the power of the installed engine, as they can perform two cuts in one turn. In famous

 BUT

With scissors, a large part of the crank turn goes to the installation of the upper knife and the initial position, since its position after the cut and before the cut is different in different directions. In addition, the proposed device, in comparison with the prototype, has a simpler design for obtaining a rolling motion, which makes it possible to reduce gabagy and reduce the drive power.

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Claims (1)

SCISSORS FOR CUTTING A SHEET containing a bed with a fixed knife fixed on it, a knife beam a crank shaft with a connecting rod and a slider mounted on an axis mounted in the knife beam and installed in the bed guides, distinguishing with the fact that, in order to reduce the dimensions, reduce drive power and ensure a two-sided rolling cut, they are equipped with a copier mounted on a knife beam, made with a cylindrical surface parallel to the edge of the upper knife, and a beam with a horizontal surface mounted on anine ,, while the copier is installed with the possibility of interaction with the horizontal surface of the beam and pressed to the last -SU „., 1038107