JPS6039147Y2 - Fusing slag removal equipment for steel billets - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for removing slag from melt cutting of a steel billet.

For example, a slab manufactured by continuous casting equipment is melt-cut into steel slabs of a predetermined length, but molten slag generated during the cutting adheres to the lower surface of the steel slab, forming so-called torch sag.

If a steel billet with melting slag (referred to as torch sag) still attached is hot-rolled, bite defects in the rolling rolls, lamination defects on the surface of the rolled product, etc. will occur. needs to be removed.

Conventionally, methods for removing the fusion slag are roughly divided into two methods: melting it with scarf ink and blowing it away, and cutting it with a knife. Some are listed in the official gazette.

The device described in this publication has a tool rest that is moved up and down by a hydraulic cylinder, from the center of the front part to both sides of the rear part, and each cutter is placed at a required angle with respect to the advancing direction of the steel billet and at a required mutual spacing. At the same time, the ends of adjacent blades are arranged in a receding manner by wrapping each other, and the protrusion level of each blade is gradually lowered from the center to the blades on both sides.

In this device, since the blades are arranged as described above, if the edge of the steel piece is curved in the width direction, there is a drawback that the welding slag in the warped part cannot be sufficiently cut. In addition, when the blade comes into contact with a steel piece, a large impact force is applied to the blade, which shortens the life of the blade.

The present invention is intended to solve the various drawbacks of the conventional apparatus as described above, and an embodiment thereof will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a roller table for transporting a steel billet 2 cut to a predetermined length to, for example, a hot rolling mill. A tool rest that is moved up and down by a cylinder 3 is installed perpendicular to the roller table 1.

As shown in FIG. 2, on the top surface of the tool rest 4,
For example, a planar dog-shaped tip 5 has a receding angle θ of 3 to 100, preferably about 5°, with the center of the front part (inlet side of the steel piece 2) as the apex and a receding angle θ of 3 to 1O0, preferably about 5°, in both directions. stand 4
The cutting edge is fixedly held upward by a holder 4a fixed to the holder 4a.

Further, middle and rear cutters 6 and 7 are arranged at a required distance from the tip cutter 5, preferably parallel to each other, and wrapped around each other so as to extend rearward in both directions, and hold the cutting edges upward by a holder 4a. has been done.

Of the middle and rear cutters 6, 7, the cutter portions 6a, 7a that overlap with the front cutter are attached to the holder 4a.
A spring 8 interposed in the lower part of the steel piece 2 applies an appropriate abutting force to the lower surface of the steel piece 2 to hold it therein.

The blade edges of the middle and rear blade parts 6a and 7a, which are interposed with the spring 8, are the blade edges of the front blade, for example, the blade edge of the blade part 6a has a protrusion level higher than that of the tip blade 5. , for example, about 3 to 5 mm higher, and the blade part 7
The protruding level of the cutting edge a is set to be higher, for example, by about 3 to 5 m, than the cutting edge of the fixed blade part of the cutting tool 6, and if the steel piece 2 is warped in the width direction, the front cutting tool Even if the cutting edge of the blade does not contact the lower surface of the steel piece 2, the rear blade part 6a, ? The cutting edge of the steel piece a comes into contact with the lower surface of the steel piece 2, so that the cutting slag 2a on the lower surface of the steel piece 2 can be cut.

As shown by the chain line in FIG. 2, a cutter 9 with a spring 8 interposed therein may be provided behind the fixed cutter portion 7b of the rear cutter 7, preferably in parallel with a required spacing therebetween. You can.

Further, in order to be able to precisely respond to changes in the warpage of the steel piece 2, it is preferable to divide the spring-equipped cutter portions 6a, 7a (also the cutter 9) into a plurality of parts.

Furthermore, the device according to the present invention can of course be applied to the case where scale is removed from the upper and lower surfaces and both side surfaces of the steel piece 2. are preferably installed on the upper and lower surfaces and both side surfaces of the steel piece 2, facing each other.

Furthermore, in the case of removing fusion slag or removing scale, the roller chiffle 1 for conveying the steel slab 2 is controlled to rotate in forward and reverse directions to cause the steel slab 2 to reciprocate, so the blade 5.6.7 The tool rest 4 equipped with the above-mentioned tools shall be installed symmetrically at the front and back positions in the traveling direction of the steel piece 2 with a required distance.

As mentioned above, in order to cut the melt-cut slag of the steel billet during the conveyance process of the steel billet that has been melt-cut to a predetermined length, the present invention uses a vertically movable tool rest with the front center, which is the entry side of the steel billet, as the apex. A dog-shaped fixed tip cutter, a spring-inserted cutter part that is at a required distance from the tip cutter and wraps with the tip cutter, and a fixed cutter part that is arranged adjacent to both sides of the spring-inserted cutter part. a rear cutter having a spring-interposed cutter portion which is arranged in the same way as the middle cutter portion and overlaps with the front fixed cutter portion, and fixed cutter portions which are arranged adjacent to both sides of the spring-interposed cutter portion; The protruding level of the cutting edge of each of the spring-interposed cutting tool parts is made slightly higher than the cutting edge of each fixed cutting tool part located at the front, so that the cutting slag can be removed by the cutting tool across the entire width direction of the lower surface of the steel piece. Since cutting is not performed simultaneously and parts can be cut sequentially according to the sweepback angle of the blade, a large impact force is not applied to the blade, so the life of the blade can be extended.

Furthermore, if the steel piece is warped in the width direction, the cutter slag that could not be cut with the front cutter can be smoothly and reliably cut step by step using the middle and rear cutters that overlap with the front cutter. can do.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an embodiment of the device of the present invention, and FIG. 2 is a schematic plan view showing the arrangement of cutters in a tool post. 1...Roller table for conveying steel pieces, 2...
... Steel billet, 2a ... Cutting slag, 3 ...
...Fluid pressure cylinder, 4...Turret, 4a...
...Knife holder, 5...Tip knife, 6,
7...Middle and rear blades, 6a, 6b,
? a, 7b... cutler part, 8...
··spring.

Claims (1)

[Scope of utility model registration request] In order to cut the melt-cut slag of the steel billet during the conveyance process of the billet cut to a predetermined length, a dogleg-shaped fixing point with the apex at the front center, which is the entry side of the billet, is placed on the vertically movable tool rest. A middle cutter having a cutter, a spring-inserted cutter portion that is spaced from the tip cutter and wraps with the tip cutter, and a fixed cutter portion that is disposed adjacent to both sides of the spring-interposed cutter portion; A spring-interposed cutter portion arranged in the same manner as the cutter and overlapped with a front fixed cutter portion, and a rear cutter having fixed cutter portions arranged adjacently on both sides of the spring-interposed cutter portion, each of the springs A steel billet fusing slag removal device in which the protruding level of the cutting edge of the intervening blade part is slightly higher than the cutting edge of each fixed blade part located at the front.