DE2217957C3 - Cutting device for rolling stock - Google Patents

Description

The present invention relates to hot cutting of rolling stock, and more particularly to one Cutting device for rolling stock with a front and a rear cutting plate, which are parallel to each other in are rigidly attached to a frame that can be moved back and forth in the direction parallel to the cutting plane is arranged between two guide bushes, which are attached to the frame of the cutting device and guide the rolling stock into the cutting zone. Such Cutting device is known from the USSF Inventor's Certificate I 79 169.

In this known device, the warm rolling stock is fed on a roller table and placed freely in the guide bushes.

The frame with the cutting plates moves back and forth perpendicular to the rolling stock axis lying plane, the front cutting plate first becomes effective and a first cut executes As the frame continues to move, the rear cutting insert takes effect and leads make a second cut, creating a short length of waste

Then the frame with the cutting plates returns to the starting position and the cutting game is repeated.

The disadvantage of this known device is the occurrence of relatively large forces Cutting the rolling stock, after which its cross-sectional shape is distorted, the quality of the cut surface suffers and (Jrat arises. In addition, a lot of metal goes into Lost shape of chips. All of this is a consequence of the fact that the rolling stock material cannot move freely during cutting.

The object of the present invention is to provide a cutting device for hot rolling stock, while avoiding the disadvantages listed, in which smaller cutting forces occur during cutting, no deformations of the rolling stock shape occur, high-quality and precise cut surfaces can be achieved and material waste is reduced.

Starting from a device of the type described at the outset, this object is achieved proposed according to the invention that the guide bushes clamping devices for clamping the Have rolling stock during cutting, and that located on the side of the rear cutting plate Bushing is displaceable on the frame along the axis of the rolling stock, in front of the central part of the frame a curve template is rigidly attached to the rear cutting plate, which the movable bushing in the Movement of the frame positioned for the cut to be made by the rear cutting insert The invention is further explained below by the description of an exemplary embodiment with reference to the drawings

F i g. 1 shows the side view of the device according to the invention; '5 Fig. 2 shows the top view of the device;

F i g. 3 shows a section along line II-II of FIG. t; F i g. 4 shows a section along line II [-IfI of FIG. 1;

F i g. 5 shows the front view of the frame with the cutting inserts; F i g. 6 shows a section along line IV-IV of FIG. 5;

F i g. 7 to 9 show the sequence of the cutting process.

The cutting device for rolling stock consists of a stand 1 on the guide bushes 2 and 3 are placed, through which the rolling stock is fed.

Between the guide bushes 2 and 3 is located

in a plane perpendicular to the rolling stock axis

Frame 4 with fastened in it parallel to each other Cutting plates, namely a front cutting plate 5

and a rear cutting tip 6.

The frame 4 can move back and forth between the guide bushes 2, 3 in a guide 7 carry out. Any suitable drive can be used for this purpose.

The guide bushes 2, 3 are designed to be removable and on each of them clamping devices 8 are mounted for holding the rolling stock consist of stops 9, which sit on slides 10, which are in guide tracks U -ies stand 1 • ♦ o are located. The clamping devices 8 are through Pneumatic drives 12, which are mounted on the stand 1, are actuated.

The guide bushes 2, 3 have removable segment-shaped inserts 13,14, which are used to convert the «5 device are used according to the different dimensions of the processed rolling stock.

The guide track 11 of the guide bush 3 is designed in the form of a dovetail guide 15, so that sliding of the same along the axis of the rolling stock is possible

To lock the movable guide bush 3 in the working position, electromechanical locking devices 16 are provided in the stand 1.

The front cutting plate 5 (Fig.5) has a Wedge-shaped cutout with a semicircular recess at the angle tip.

The rear cutting plate 6 is parallel and offset to the front cutting plate and its cutting edge runs at an angle in their cutting plane. The cutting edges of both inserts are one-sided, and although sharpened on the side of the rolled quality end faces to be cut.

In the middle part of the frame 4 is under the rear Cutting plate 6 a curve template 17 rigidly attached,

which is used in advancing movement of the frame 4, the socket 3 in the working position for

Execution of the second cut. The operation of the described cutting device

proceeds as follows when making a double cut:

Warm rolling stock, e.g. B, a round profile, is on a Roller table fed to the guide bushes 2 and 3 from the side of the immovable bushing 2 and around a inserted into it for a certain length. Then it gets inside them by feeding compressed air into the air cylinders 12 clamped, the piston rods move the stops 9, which the removable Press segment-shaped inserts 13, 14 onto the rolling stock 18.

After the rolling stock 18 has been clamped in the device, the frame 4 is set in motion, which executes a progressive movement transversely to the rolling stock, the front cutting plate 5 being the first Section executes, namely according to F i g. 7 the cutting of the rolling stock 18 in the cutting plane 19 (FIG. 8).

After completion of this first cut, according to FIG. 8, the guide bush 3 with the cut-off rolled material 20 clamped in it is displaced by a distance which is equal to 1.5 to 3 times the thickness of the front cutting plate 5. This is done in that as the frame 4 continues to move, the curve template 17 comes into contact with the guide bushing 3 and pushes it into the working position for making the second cut.

Then the rear cutting plate cuts according to Fig. 9 6 the deformed part 21 of the rolling stock from

ίο Rolled stock part 20 in the cutting plane 22.

Then returns: the frame 4 with the cutting plates 5, 6 back to the starting position and the electromechanical locking devices 16 are released. The guide bushing 3 is through a Return mechanism (not shown) brought back into the starting position. At the same time, the Stops 9 of the clamping devices, pushed apart by means of the compressed air cylinder 12 and new Rolled stock 18 guided into the device, whereby the cut off rolled stock part 20 from the guide bushing 3 is pushed out. Then it works again Cutting game.

For this purpose 3 sheets of drawings

Claims (1)

Claim; Cutting device for rolling stock with a front and a rear cutting plate, which are parallel are rigidly attached to each other in a frame that back and forth in the direction parallel to the cutting plane is arranged movably between two guide bushes which are attached to the frame of the cutting device and the rolling stock in the Guide the cutting zone, characterized in that the guide bushes (2, 3) have clamping devices (8) for clamping the rolling stock (18) have during cutting, and that the one located on the side of the rear cutting plate (6) Bushing (3) on the frame (1) is displaceable along the axis of the rolling stock (18), in the middle part of the frame (4) in front of the rear cutting plate (6) a curve template (17) is rigidly attached, which the movable bushing (3) during the movement of the frame (4) for the through the rear cutting plate (6) the cut to be performed is positioned