JPH018251Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a device for removing burrs generated when cutting slabs into appropriate lengths during continuous casting operations.

(Prior Art) A gas cutter is generally used to measure and cut the slab, but in this method, during cutting, a large amount of burrs are generated, particularly on the bottom surface of the slab, and adhere to the ends of the slab. These cutting burrs must be removed because they cause defects in the product in the subsequent rolling process.

Conventionally, when removing this cutting burr, the cast slab was once cooled and scraped off-line using a glider or by hand, but this had problems such as low work efficiency and wasted thermal energy. Further, as an online deburring method, there is a removal method by scarfing, but in this case, the slab must be temporarily stopped on the conveyance path, which causes a temperature drop.

Furthermore, Utility Model Application Publication No. 58-23259 related to the application filed by the applicant
There is a burr removal device disclosed in the above publication. According to this device, the deburring blade rises when the slab is loaded onto the tip roller and deburrs the bottom surface of the slab over almost its entire length from the tip to the rear end. The structure is such that the blades touch each other. Although the purpose could be achieved if the deburring blade only contacted the edges where cutting burrs occur, the deburring blade comes into contact with the slab unnecessarily and this causes wear and tear on the deburring blade. This may cause problems such as difficulty in carrying out the transportation work smoothly.

(Purpose of the invention) The present invention eliminates these conventional drawbacks and provides a burr removing device that has a simple structure and does not require a special driving source.

(Structure and operation of the invention) The present invention will be explained below with reference to the drawings.

FIG. 1 is an overall view showing an embodiment of the device of the present invention, and shows the state before operation.

Reference numeral 1 denotes a rotation shaft which is rotatable about its center and is supported in a direction perpendicular to the slab conveyance line by a known bearing device (not shown) so that the center position does not fluctuate. Reference numeral 2 denotes a boss which is fitted onto the rotating shaft 1 and locked with a key.Furthermore, a front arm 3 is provided on the slab entry side of the boss 2, and is constructed integrally with the boss 2. A touch roller 4 is rotatably supported at the other end of the front arm 3. Further, one end of a rear arm 5 is fixed to the boss 2, and one end of a spring 6 is fixed to the other end of the rear arm 5. The other end of the spring 6 is attached to a base 7 fixed to a frame 8. Reference numeral 9 denotes a stopper, which is firmly fixed to the frame 8 at a position directly below the boss 2 and symmetrical to the touch roller 4 about the rotation axis 1. Reference numeral 10 denotes a cutting blade which is attached to the upper part of the boss 2 on the slab entry side from the center of the rotating shaft 1. 11 is a slab conveying table roller, and 12 is a slab.

Here, the highest level of the outer periphery of the touch roller 4 before operation of the device of the present invention shown in FIG. 2
The upper limit position is maintained by contact between the lower part of the stopper 9 and the stopper 9. Further, the spring 6 is strong enough to always exert a force in the direction of contraction so that the lower part of the boss 2 comes into contact with the stopper 9 when no slab is loaded on the touch roller 4 (the state shown in FIG. 1). Furthermore, the cutting blade 10 provided at the top of the boss 2 is stabilized by being held above the pass line during standby, and during operation, that is, the slab comes into contact with the touch roller 4, and the upper surface of the outer circumference of the touch roller 4 coincides with the pass line. When this occurs, the cutting blade 10 falls below the pass line and is prevented from coming into contact with the leading edge of the slab, and as the trailing edge of the slab separates from the tatsuchi roll, the spring 6 contracts, so that only the cutting blade 10 comes into contact with the bottom surface of the slab. Configure as follows. It is convenient to bias the cutting blade and the touch roller upward from the bottom surface of the slab by pulling down the rear arm using a spring 6 as shown in the figure, but the same purpose can be achieved by other similar means. It is fine as long as it is something.

Next, the operation of the device of the present invention will be explained.

As the slab 12 moves from right to left in Fig. 1, its tip comes into contact with the touch roller 4, and the weight of the slab and the kinetic energy of the movement cause the touch roller 4 and front arm 3 to move. Both of them begin to rotate clockwise about the center of the rotating shaft 1 until the touch roller 4 rotates to a position where it coincides with the lower surface (pass line) of the slab 12. Figure 2 shows the situation.

At this time, the boss 2 and rear frame 5, which are integrally formed with the rotation shaft 1, also rotate around the center of the rotation shaft 1. Along with this, the cutting blade 10 attached above the boss 2 moves downward, and the upper surface of the cutting blade 10 becomes below the pass line. Further, since one end of the spring 6 is attached to the rear arm 5, the rotation of the rear arm 5 causes the spring 6 to be in an expanded state. The tension of the spring 6 is designed so that it expands when the slab 12 contacts the touch roller 4 and pushes down the touch roller, and contracts when the slab is not present. The rear end of the slab 12 moves to the left in the figure, and after passing the touch roller 4, the touch roller 4 returns to rotation (counterclockwise) about the rotation axis 1 due to the action of the spring 6, and the cutting blade 10 rotates in the same manner until the cutting blade 10 contacts the lower surface of the slab 12, and the cutting blade 10 coincides with the pass line. FIG. 3 shows the state.

By aligning the cutting blade 10 with the lower surface of the slab and the contact pass line in this way, the burr 13 attached to the end of the slab 12 while the slab is traveling is scraped off. The kinetic energy generated by the movement of the slab can sufficiently overcome the resistance during scraping.

After the deburring is completed, the end of the slab 12 moves to the left in the figure, and after passing the cutting blade 10, the spring 6
The operation returns to the state shown in FIG. 1 and prepares for the next operation.

In addition, as a countermeasure against hanging from the pass line due to bending of the tip of the slab 12, etc., there are measures to be taken when passing (second
The distance from the pass line of the cutting blade 10 shown in the figure may be set in consideration of the bending of the slab.

(Effect of the invention) By using the device of the invention as described above,
It is possible to remove burrs with simple and inexpensive equipment without temporarily stopping the slab online, without requiring special power for deburring, saving labor and energy, and reducing product defects after rolling. It is possible to measure the yield improvement due to the decrease.

By installing two devices of this invention on a line that can run in reverse, it is possible to remove burrs attached not only to the rear end of the slab but also to the tip, and also to remove burrs attached to the top surface of the slab during conveyance. However, it is possible to remove burrs by installing the device of the present invention above the conveyance path.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; FIG. 1 is a general view of the device of the present invention before operation, and FIGS. 2 and 3 are general views of the device during operation. 1 is a rotating shaft, 2 is a boss, 3 is a front arm, 4 is a touch roller, 5 is a rear arm, 6 is a spring, 7 is a base, 8 is a frame, 9 is a stopper, 10 is a cutting blade, 11 is a table roller ,1
2 is a slab, 13 is a burr.

Claims (1)

[Scope of utility model registration request] A rotating shaft installed in a direction perpendicular to the slab conveyance line, a boss fitted into the rotating shaft and provided with a cutting blade at the upper part on the slab entrance side from the center of the rotating shaft, and a boss further on the slab entrance side of the boss. It consists of a front arm provided, a touch roller provided at its tip, and a spring that urges the touch roller and cutting blade to be positioned above the bottom surface of the slab. The roller is lowered, and the cutting blade is positioned below the bottom surface of the slab.
A burr removal device for a continuous slab, characterized in that the touch roller and the cutting blade are configured to be rotatable so that when the tail end of the slab leaves the touch roller, only the cutting blade comes into contact with the bottom surface of the slab. .