SU538830A1 - Hydraulic scissors - Google Patents

Description

one

The invention relates to metallurgical production, in particular, to devices for cutting moving metal billets produced on continuous casting machines.

Known tilting shears are known that contain a free-hanging frame and two interacting knives 1. However, such scissors are subject to significant wear at the sites of numerous joints of the drive mechanism and synchronized movement of the knives.

The closest to the described invention by technical essence are hydraulic mini scissors, containing a frame freely suspended on the axle with a lower knife fixed on it and a hydraulic cylinder placed in the frame, the rod of which is connected with the sunnort mounted on the frame guiding it knife 2.

A disadvantage of the known scissors is that during the cutting process the point of application of the resultant cutting is not at the edge of the knife, but is displaced from it into the body of the knife by an amount equal to 0.3-0.5 of the height of the material being cut. In addition, the positioning of the knives (the cutting plane) along the axis of the working cylinder leads to the caliber of the slide in the guide frames

cutting time. At the same time, the slide rails operate with their own angles, which become the co-hubs of specific pressures, which is the cause of the intense and uneven curvature of the rails.

In order to reduce torsion by eliminating the skew of the slide during cutting, it is proposed to place the hydraulic cylinder in the frame with a parallel cutting plane by shifting its geometric axis into the body of the upper knife by 0.1-0.5 of the knife solution.

The drawing shows the insulated hydraulic matting brackets and the forces acting on the caliper during cutting.

Hydraulic mat scissors contain a frame 2 freely suspended on the axis 1 with a fixed lower knife 3 and a hydraulic cylinder 4 placed in the frame, the brush 5 of which is connected with the

guides 6 of frame 2 of support 7 with an upper knife 8 fixed on it, the hydraulic cylinder being located in the frame with a cutting plane of the cutting plane shifting it into the body of the upper knife by a value of 0.1-0.5 mortar

knives.

Scissors work as follows. The material to be cut 9 is transported by the rollers 10 into the space between the blades 3 and 8. Then pressure is applied to the piston

cavity hydrocyliidra 4, and the brush 5 together

with the caliper 7 and the knife 8, it moves in the guides 6 of the frame 2 towards the knife 3, which cut the material. In connection with the downward shift, the cut-off end of the material under the action of the knife 8 presses the roller 11 and lowers it (the floating roller AND belongs to the rolling roller). After cutting, the working fluid is supplied to the rod stock of hydrocylipdra 4 and returns the sunnort 7 with the knife 8 to its original position.

Since the material being cut continues to move under the action of the rollers 10, it, acting on the sheath 3 and 8, deflects the scissors frame 2 on the axis 1. During the cutting process on the knife 8, mounted on the caliper 7, a force acts on the material side which is directed but lines NM. At the same time from the side of the hydraulic cylinder 4 on the caliper 7 acts force directed along the axis of the hydraulic cylinder.

From the equilibrium condition, as a result of the addition of the forces acting on the caliper 7 from the side of the hydraulic cylinder 4 and the material being cut 9, the vertical components balance each other, and the horizontal component presses the caliper 7 on the guide 6 of the frame 2 and balances its reaction.

In connection with the displacement e of the hydraulic cylinder 4, the intersection point of the axis of the hydraulic cylinder with the NM line lies within the height of the support 7 and the latter is pressed to the plane by the guide 6 of the frame 2, and there is no skewing moment. This circumstance excludes the tilting of the support 7 in the guides 6 of the frame 2, significantly reducing their wear. The technical and economic effect is achieved by extending the service life of the guides, which are the only (except knives) fast-wearing parts that determine the life of the scissors as a whole.

Claims (2)

1. The author's certificate number 184108, M. Cl.2 In 23D 25/06, 1965. 2.Certificate of certificate number 219998, M. Cl.2 In 23D 25/06, 1967 (prototype). W .