DE456515C - Scissors for cutting up rolled material - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
FEBRUARY 25, 1928

REICH PATENT OFFICE

PATENT LETTERING

CLASS 49c GROUP

Demag Akt-Ges. in Duisburg.

Scissors for cutting up rolled material.

Patented in the German Empire on July 17, 1925.

The invention relates to scissors for cutting rolling stock; she should be in primarily used in rolling mills to subdivide the rolling stock that is still warm arrive and is arranged in a known manner under the floor, the knives in overlap in the horizontal direction.

The new thing is that the knife during the cutting process, through one in the hallway ίο Covering the intended opening stepping out, close and after the cut to open, pull back below the corridor level.

Due to this arrangement and design of the scissors, the rolling mill floor remains completely free, so that the towing of the rolling rods by the scissors in no way hindered will.

The formation of the scissors can be made so that one knife is firmly attached a liftable and lowerable knife carriage and the second on the upper leg of one serving as a connecting rod and articulated to the knife carriage double-armed

The lever that drives it by a crankshaft mounted in the scissor stand.

An exemplary embodiment of the invention is shown schematically in the drawing. Fig. Ι shows the scissors in the side and Fig. 2 in the front view.
Figs. 3 to 5 show the knives in the various positions.

The scissors stand, which is arranged under the floor covering 2, is denoted by 1 and is provided with the slide guided in the guide 4, which is raised and lowered through the intermediary of the crankshaft 5 and the connecting rod 7 which encompasses the crank pin 6 in the form of a fork. The connecting rod 7, which is articulated to the slide 16 at 8, has two arms, the leg 9 serving as a carrier for the one knife. The counter knife 11 is attached to the carriage 6, the weight of which is balanced by the counterweight 12. (Fig. 2).

Starting from the knife position according to Fig. 2, the mode of operation of the Scissors like this:

When the crankshaft 5 is driven in the indicated direction of the arrow, the carriage is raised with both knives, these knives protruding through the opening 13 in the floor covering above the floor level. The knife 10 enters the cutting movement after initially pivoting out, whereby (see Fig. 3) the roller rod 14 to be cut is clamped between the two knives and cut through in ¹ further step of the crankshaft 5 (Fig. 4). After the highest crank pin position has been exceeded, the downward movement of the slide and the knives begins, whereby, as soon as the crank radius has exceeded the horizontal position (Fig. 5), the shear knives open again and return to

return to the starting position (Fig. 2), after which the work cycle is down repeated.

The drive crank device for the crankshaft 5 is not shown in the drawing. The same is formed from the motor and the gear train in the usual way and stranded in a known manner with a release clutch, which after through- guidance of a cutting stroke disengages automatically.

The structural design of the subject matter of the invention does not match that shown Embodiment bound, it does not matter, for example, with the help of which Machine elements transfer the stroke movement of the knife carriage to the knife will that these close during the lifting and lowering movement and open again. The invention becomes quite general seen in the basic idea for the arrangement and design of the scissors explained at the beginning.

Claims (1)

Claim: Scissors for cutting up rolling stock, characterized in that the under Scissors arranged in the corridor are provided with knives (10, 11) which intersect in the horizontal direction and which are used in the Cutting process, emerging through an opening (13) provided in the floor covering (2), close and, after the cut has been made, are pulled back below the floor level, opening again. 1 sheet of drawings.