JPS6037157Y2 - Fusing slag removal equipment for steel billets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for removing small pieces of melted slag.

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

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

Conventionally, devices for removing the fusion slag are roughly divided into methods of melting and blowing it away with scarfing, and methods of cutting with a knife, among which methods of cutting with a knife include:
For example, there is one described in Japanese Utility Model Application Publication No. 54-64139.

In this conventional device, each blade is placed at a predetermined distance from the center of the front part to both sides of the rear part of the tool rest, which is moved up and down by a hydraulic cylinder, and the ends of adjacent blades are wrapped around each other so that each blade is arranged in a backward arrangement. The protrusion level is gradually lowered from the center to both sides.

With this conventional device, the protrusion level of each blade decreases toward the rear, so if the edge of the steel billet is curved upward in the width direction, there is a drawback that it cannot cut the fusion slag of the steel billet. .

The present invention is intended to eliminate the drawbacks of the conventional device, and embodiments thereof will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a roller table for conveying a steel billet 2 cut to a predetermined length to, for example, a hot rolling mill. A tool post 4 that is moved up and down by a cylinder 3 is installed.

As shown in FIGS. 2 and 3, the tool rest 4
At the center of the front part (inlet side of the steel piece 2) on the upper surface, a flat dog-shaped knife 5 having a sweepback angle θ of, for example, 3 to 10 degrees, preferably about 5 degrees, is mounted on a holder 4a fixed on the tool rest 4. The cutting edge is held upward by the

Further, on the upper surface of the tool rest 4, starting from the cutter 5 at the center of the front part and extending over both sides of the rear part of the tool rest 4, each cutter 6 is arranged at a required interval, and adjacent ends are overlapped with each other. and approximately parallel to each side of the cutter 5 in the center of the front part,
Each blade edge is held upward by a holder 4a.

The blade edges of the blades 5 and 6 increase in height, for example, by about 3 to 5,771,771 points toward the rear of the blade.

Each cutter 5 held in each of the holders 4a
, 6 are provided with an appropriate contact force against the lower surface of the steel piece 2 by a spring 7 interposed in the lower part of each holder 4a, so that even if the steel piece 2 is warped in the width direction, This allows the cutting slag 2a on the lower surface of the steel piece 2 to be cut.

As another example, as shown in FIG. 4, each cutter 5.6 held in each holder 4a has a relatively elastic spring 8 in the lower part of each holder 4a, and a comparatively strong spring 8 in the upper part. The spring 9, which has a weak elasticity, applies an appropriate contact force to the lower surface of the steel piece 2, and the strong spring 8 may be used to cut the welding slag 2a on the lower surface of the steel piece 2.

In this case, the spring 8 with strong elasticity in each holder 4a becomes shorter as the cutting edge becomes higher, and the spring 9 with weaker elasticity becomes longer as the cutting edge becomes higher. When the steel piece 2 comes into contact with the steel piece 2 that is tilted downward in the width direction, consideration should be given to reducing the large impact force that is applied to the blade with a high cutting edge.

In addition, as shown in FIG. 5, the cutter 5 at the center of the front part may have a straight blade like the other cutlers 6 and be arranged at right angles to the advancing direction of the steel piece 2. It can also be made with two blades.

Furthermore, the cutting slag 2a of the steel piece 2 is cut by each cutter 5, 6.
When cutting a relatively light piece of steel 2, there is a risk that the piece of steel 2 will float up from the roller table 1, and the contact between the piece of steel 2 and each cutter 5, 6 may be poor, causing the piece of steel 2 to Since there is a possibility that the posture may change, in order to prevent this, it is preferable to provide a pressing roller 10 for the steel piece 2 as shown in FIG.

Furthermore, in FIGS. 2 and 5, reference numeral 11 indicates a guide for vertical movement of the tool rest 4.

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 is designed to sequentially arrange the steel billet from the front center on the entry side of the tool rest to both rear sides. The protrusion level of each blade is gradually increased toward the rear, so even if the steel billet is tilted upward in the width direction, it is possible to uniformly and reliably cut the welding slag across the entire width of the steel billet. .

Moreover, since each knife is held at a lower position with respect to the tool rest via a spring, the spring can apply an appropriate contact force to the strip of each knife, thereby protecting each knife and protecting the steel strip. Even if there is warpage in the width direction, smooth cutting of the welded slag can be performed.

It goes without saying that the device according to the present invention can also be applied to the case where scale is removed from the top, bottom, and both sides of a steel piece. It is best to install them facing each other on both sides.

In addition, when removing welding slag or scale,
Since the roller table for transporting the steel billet is controlled to rotate in forward and reverse directions to cause the billet to reciprocate, the turret equipped with the cutter is symmetrical with a required distance in front and rear positions in the direction of movement of the billet. shall be equipped.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an embodiment of the device of the present invention, Fig. 2 is a schematic plan view showing the arrangement of cutlery in the tool post, and Fig. 3 is a diagram taken along line A-A in Fig. 2 showing details of the cutter holder. FIG. 4 is an enlarged sectional view, FIG. 4 is a sectional view showing another example of the blade holder, and FIG. 5 is a schematic plan view showing another arrangement of blades in the tool rest. 1...Roller table for conveying steel pieces, 2...
... Steel billet, 2a ... Cutting slag, 3 ...
...Fluid pressure cylinder 4...Turret, 4a.
...Knife holder, 5゜6...Knife, 7
・・・・Spring, ・・・・Spring with relatively strong elasticity, 9：・・・Spring with relatively weak elasticity.

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, each cutter is arranged sequentially from the front center on the entrance side of the billet on a vertically movable tool rest to both rear sides. A steel billet fusing slag removal device in which the protrusion level is gradually increased toward the rear, and each knife is held at a lower position relative to the tool rest via a spring.