RU2736946C1 - Shears for cutting of rolled metal - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to shearing operations of metal working with pressure and can be used in the application of mechanical presses and scissors. Shears for rolled metal cutting comprise upper blade arranged in the bed, crank-and-rod mechanism hinged to the bedplate and to the slider installed in the bed with the possibility of being moved parallel to the cutting plane by elastic connection, and the lower knife. Lower blade is made in form of half-bushing, installed in slider with possibility of translational movement parallel to cutting plane and rests with possibility of relative translational movement on inclined plane of wedge, which is installed in slider with possibility of translational movement in plane perpendicular to cutting plane. In slider there is additionally clamped billet with possibility of translational movement parallel to cutting plane. At the same time the workpiece clamp rests with the possibility of relative translational movement on the inclined plane of the other wedge, which is installed in the slider with the possibility of translational movement in the plane perpendicular to the cutting plane. Both wedges are connected with hydraulic cylinders installed in slider.

EFFECT: as a result, expansion of technological capabilities.

1 cl, 1 dwg

Description

The invention relates to separating operations of metal forming and can be used when using mechanical presses and shears.

Known scissors for cutting rolled products containing a crank mechanism installed in the frame, the slider of which, during the operation, rests on the lower knife installed in the frame. An upper knife is also installed in the bed, moreover, the lower and upper knives are installed with the possibility of relative movement parallel to the cutting plane due to the elastic connection - the bed [patent RU 2670349 C2, 22.10.2018].

The disadvantage of the known shears for cutting rolled products is that there is not enough time for opening the knives for feeding over a long length to cut the workpieces in a continuous cycle of motion.

The invention is aimed at expanding the technological capabilities of shears for cutting rolled products.

The expansion of the technological capabilities of the scissors for cutting rolled products is achieved by the fact that they contain an upper knife located in the bed, a crank mechanism pivotally connected to the bed and with a slider installed in the bed with the ability to move parallel to the cutting plane by means of an elastic connection, a lower knife, and the lower the knife is made in the form of a half-sleeve, installed in the slider with the possibility of translational movement parallel to the cutting plane and rests with the possibility of relative translational movement on the inclined plane of the wedge, while the wedge itself is installed in the slider with the possibility of translational movement in the plane perpendicular to the plane of the cut, in addition in the slider an additional clamp of the workpiece is installed with the possibility of translational movement parallel to the cutting plane, and the clamp of the workpiece itself is supported with the possibility of relative translational movement on the inclined plane of another wedge, which is installed in the slider with the possibility translational movement in a plane perpendicular to the plane of the cut, while both wedges are connected with hydraulic cylinders installed in the slide.

FIG. 1 shows the shears for cutting rolled stock in the section of the return of the kinematic chain of the shears to the upper position at the beginning of cutting the workpiece.

The scissors for cutting rolled products contain an upper knife 2 installed on the frame 1 on one side relative to the cutting plane, a crank mechanism 3, pivotally connected to the frame and the slider 4. The slider 4 itself is installed in the frame 1 from the opposite side relative to the cutting plane by means of an elastic connection 5 with the possibility of translational movement parallel to the cutting plane.

In the slider with the possibility of translational movement in planes perpendicular to the cutting plane, wedges 6 and 7 are installed, on the inclined planes of which, with the possibility of translational movement relative to the wedges 6 and 7, respectively, the lower knife 8 and the clamp of the workpiece 9 are installed, connected with the slider 4 with the possibility of translational movement parallel to the cutting plane. Wedges 6, 7 are connected with hydraulic cylinders installed on the slide (not indicated).

The hydraulic cylinders are hydraulically connected to a control system (not shown).

Shears for cutting blanks work as follows. When the crank mechanism is stopped in the extreme upper position, the wedges 6, 7 are retracted away from the cutting plane, and the lower knife 8 and the clamp of the workpiece 9 are retracted from the rolled product by the amount of radial clearance required for free passage. Rolled stock is fed to the value of the required length of the workpiece into the working space through the hole of the upper knife 2 between the lower knife 8 and the clamping blanks, and the lower knife 8 and the clamping of the blank 9 are closed on the cut-off part of the rolled product when the wedges 6 and 7 move towards the cutting plane. When the crank mechanism is returned upwards, a piece of the workpiece is cut off by the force of elastic deformation of the shears.

Dividing the lower knife and the clamp to the sides of the rolled metal allows the rolled metal to be fed to any length of the cut part when the shears stop in the extreme upper position.

Claims (1)

Shears for cutting rolled products, containing an upper knife located in the bed, a crank mechanism pivotally connected to the bed and with a slider installed in the bed with the ability to move parallel to the cutting plane by means of an elastic connection, and a lower knife, characterized in that the lower knife is made in in the form of a half-sleeve, installed in the slider with the possibility of translational movement parallel to the cutting plane and rests with the possibility of relative translational movement on the inclined plane of the wedge, while the said wedge is installed in the slider with the possibility of translational movement in the plane perpendicular to the cutting plane, while a clamp is additionally installed in the slider workpiece with the possibility of translational movement parallel to the cutting plane, while the said clamp of the workpiece is supported with the possibility of relative translational movement on the inclined plane of another wedge, which is installed in the slider with the possibility of translational movement and in a plane perpendicular to the cutting plane, with both wedges connected to hydraulic cylinders installed in the slide.

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