JPH02179312A - Bar rolling equipment - Google Patents

Abstract

PURPOSE:To supply the high productivity of a bar rolling equipment by cutting off plural bar steels simultaneously with an abrasive cut off machine at the succeeding stage of a primary cooling bed, cooling on a secondary cooling bed while feeding the bar steels, after that chamfering one end after that and chamfering the other end after aligning. CONSTITUTION:A primary cooling bed 3 is located at the succeeding stage of the rolling mill 1 in a bar rolling line. With the abrasive cut off machines 6, 7 on the succeeding stage, plural bar steels 8 are cut off simultaneously. On the secondary cooling bed 9, the bar steels 8 are cooled while being fed to a finishing equipment 10 with a lifting beam and a horizontal moving and lifting beam. At one end of the secondary cooling bed 9, an abrasive chamfering machine 49 and a brush chamfering machine 51 are provided to chamfer. And an aligning table 52 with feed rollers is provided to align the bar steels 8 on the other end of the secondary cooling bed 9. Additionally, on the other end part, the abrasive chamfering machine 49 and the brush chamfering machine 51 are provided. Thus excellent bar steels are produced.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application" The present invention relates to a long steel rolling facility equipped with a chamfering device consisting of a grindstone chamfering machine and a brush chamfering machine.

``Conventional technology'' requires modification of the shape, bending, etc. of the bar.
- After being taken off-line, refining equipment was installed, and the refining equipment was also equipped with a chamfering device.

``Problems to be Solved by the Invention'' However, according to the conventional configuration, in order to perform chamfering after offline, it is necessary to transport and convey the long steel from the long steel rolling equipment to the refining equipment.

It is an object of the present invention to provide a long steel rolling equipment that is capable of high-quality production, can chamfer a long steel product, and can be immediately shipped to a user.

"Means for Solving the Problems" According to the present invention, there is provided a primary cooling bed which is provided after the rolling machine of a long steel rolling line and is equipped with a rapid feed device for the long steel, and a stage after this primary cooling bed. a fixed and movable grindstone cutting machine that cuts multiple strips of steel at the same time, a cooling bed downstream of the grindstone cutting machine, and a grindstone beveling machine and a brush installed at one end of the secondary cooling bed. Chamfering machine and the above 2
An aligning table having a feed roller for aligning the ends of the steel strips at the other end of the secondary cooling bed, and a grindstone chamfering machine and a brush chamfering machine provided at the other end of the secondary cooling bed. Provided is a long steel rolling equipment characterized by:

"Operation" According to the above configuration, the long steel rolled by the rolling mill is taken out while still warm at the exit side of the primary cooling bed equipped with a rapid feeder, and then cut by the fixed grindstone cutting machine and the movable grindstone cutting machine. The machine simultaneously cuts the desired length.

Furthermore, while the bar passes through the secondary cooling bed, it is first chamfered using a grindstone chamfering machine and a brush chamfering machine on one end,
Next, the other end is aligned by an aligning table, and chamfering is performed by a grindstone planer and a brush chamferer on the other end. The long steel bar, which has been cooled to approximately room temperature in the secondary cooling bed, is discharged through a refining facility.

Embodiment J Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

FIG. 1 shows a long steel rolling equipment according to an embodiment of the present invention, in which a long steel 8 rolled by a rolling mill 1 is divided by a dividing shear 2 and heated to a temperature of about 400°C to The 0-strip steel 8 that is primarily cooled to a warm state of 750°C is distributed to No. 1 line 4 and No. 2 line 5 on the exit side of the primary cooling bed 3, and is connected to a fixed grindstone cutting machine 6 and a movable grindstone. It is cut by a cutting machine 7. Then, the 8 that have been secondarily cooled by the two sets of secondary cooling beds 9 are divided into groups according to their diameters and taken in. One end of the bar 8 is pressed against the grindstone chamfering machine 49 while being rotated by a skew table 50, and the end face corner is chamfered. The brush chamfered bar 8 is aligned with the other end by the aligning table 52, and similarly chamfered by the grindstone chamfering machine 49 and the brush chamfering machine 51.

The finishing equipment 10 is for sorting and bundling the cut steel bars 8, and has a sorting floor 14. Binding machine 15. Weighing 81
16. A pick-up floor 17 is provided, and a sorting floor 1 is also provided.
4 is connected to a merging floor 19 for handling short steel bars via a reject table 18.

FIG. 2 shows the configuration of the primary cooling bed 3 of this embodiment.

The inlet side of the primary cooling bed 3 is connected to a line roller table 20 in the pass line, and the line roller table 20, which can be driven once, transfers the bar 8 rolled by the aforementioned rolling mill 1 to the primary cooling bed 3. A beam lid 21 is provided between the table 20 and the primary cooling bed. The lifter 21 includes a stationary lifter 21a whose upper part has an inclination angle, and movable lifters 21b having a similar inclination angle and which can move up and down are disposed on both sides of the stationary lifter 21a. The bar 8 on the top 20 is transported laterally to the primary cooling bed 3.

The primary cooling bed 3 has a fixed plate 22 with chevrons and a movable plate with chevrons (not shown) that is approximately the same shape as the fixed plate 22, and the bar 8 is cooled one by one by slight vertical movement and horizontal reciprocating motion of the movable plate.
It forms a cooling bed rake for conveying the
is attached.

The rapid forwarding device 24 is equipped with a high-temperature material scooping traverser 25 that can move up and down and horizontally in a reciprocating manner with a large stroke extending over the dispersion of the fixed plate 22 as shown by arrows A11B and H2 in FIG. It consists of a hydraulically driven lifting device M26 that lifts and lowers this traverser 25, and an electric motor-driven moving device 27 that moves the traverser 25 horizontally in a reciprocating manner. The primary cooling bed 3 rapidly feeds the bar 8 by the rapid-feeding device 24, and carries out the bar 8, which is still warmly cooled at about 400° C. to 750° C., to the exit side thereof. A chain conveyor 28 is provided on the exit side of the primary cooling bed 3, and this chain conveyor 28 is also provided with an elevating type traverser 29 that can move upward and horizontally. On the exit side of the chain conveyor 28, the above-mentioned No.
, No. 1 line 4 and No. 2 line 5 roll gangs 30 and 31 are arranged.
．． A chain conveyor 32 is arranged between the conveyors 31 and 31 .

The roll gang 30, 31 is composed of a large number of screw thread rollers arranged in the depth direction as shown in the figure, and applies a forward force to the bar 8, and horizontally deploys the large number of bar bars 8 to the left l; right in the drawing. It has an effect. Furthermore, stop position adjusting means 33 and 34 are arranged in the depth direction of the roll gang 30 and 31 to adjust the stop position of the end portion of the bar 8.

The fixed grindstone cutting machine 6, whose structure is shown in FIG. A predetermined dimension is determined by the position adjustment means 33 and 34, and the clamp device 37 is moved toward the cutting position, and the grindstone drive motor 39 is driven to rotate the grindstone 40, so that the grindstone 40 is at the cutting position. When the grinding wheel 40 is reached, the cylinder 41 is actuated to swing the frame 43 supported by the shaft 42 of the cart 35, and the front end of the frame 43, that is, the grindstone 40 is lowered.
The cart 35 continues to move horizontally and the grinding wheel 40 is advanced, and the bar 8
is configured to cut. Movable grindstone cutting machine 7
(not shown) is designed to determine the dimensions of the bar 8 by adjusting the distance from the fixed grindstone cutter 6, and has the same configuration as the fixed grindstone cutter 6, but The stand on which the rail 36 is mounted is movable in the longitudinal direction of the bar 8, and the grindstone cutting machines 6, 7 used in this embodiment are arranged in front of the page in FIG. 3.
is a bar 8 in which water for cooling the grinding wheel 40 is still in a warm state.
Specially constructed cover 4 to prevent it from falling on the
5 and a drainage device 46, but detailed description thereof will be omitted since it is not directly related to the gist of the present invention.

11th! As shown in FIG. 1, the No. 1 line 4 and the No. 2 line 5 are each divided into two rows of secondary cooling beds 9. A grindstone chamfering machine 49 is installed at one end and the other end of the secondary cooling bed 9, respectively. The structure of the grindstone chamfer 8149 will be explained with reference to FIG. A grindstone 54 is placed on a tilting table 55 which is horizontally movable in the depth direction and the front direction of the paper shown in FIG. . Furthermore, an abutment plate 58 and a support roller 59 are provided on the entrance side of the grindstone chamfering machine 49.

The contact plate 58 is for abutting against the end face of the bar 8 to stop the bar 8 from moving forward. The support roller 59 rotatably supports the bar 8 to which rotational force and forward force are applied by the skew table 50 described above. The grindstone chamfering machine 49 is for removing burrs and burrs remaining on the end face corners of the bar 8 cut by the above-mentioned grindstone cutting machine 6.7, and chamfers the end face of the bar 8 by rotating and horizontally moving the grindstone 54. Grind many corners to obtain a good chamfer.

Next, the structure of the brush beveling machine 51 will be explained with reference to FIG. The brush chamfering machine 51 uses a planetary flat brush 61 on the machine frame 60.
It is provided on the top and can be moved forward and backward to the cutting position and the retracted position by means of a shaft 62. The planetary flat brush 61 consists of a group of rotating flat brushes 61a that are rotated by a drive motor 62 and perform planetary motion. Each rotary flat brush 61a is preferably a bundle of steel wires having a wire diameter of 0.5 mm or more.

FIG. 6 shows the structure of the aligning table 52.
The aligning table 52 is equipped with rollers 64 rotated by a drive motor 65 on a machine frame 66, and a large number of rollers 64 drive the bar 8, and an alignment plate 67 with a shock-reducing function is provided at the - side end. Between the single machine frame 66 having an elevator beam 70, which is raised and lowered by a lifting device (not shown), and a lifting beam 70 which is raised and lowered by a lifting device (not shown) and a horizontal movement device (not shown) as shown by arrows A11B and H2, An elevating horizontally moving beam 72 that is horizontally moved in a direction perpendicular to
and are provided. The lifting beam 70 and the lifting horizontally moving beam 72 constitute the secondary cooling bed 9, and both beams 70, 72 are provided over the entire length of the secondary cooling bed 9. Then, the vertically moving beam 72 advances the strip #18 with respect to the vertically moving beam 70.
is gradually air-cooled and cooled to approximately room temperature by the time it crosses the secondary cooling bed 9.

According to the electrically controlled rolling equipment of this embodiment, the strip fI48 is fast-forwarded by the fast-forwarding device 24 in the primary cooling bed 3, so that it is conveyed to the grindstone cutting machines 6 and 7 while still in a warm state of 400°C to 750°C. Therefore, grindstone cutting with high cutting efficiency and good end face quality is performed, and burrs and burrs remaining on the end face corners of the bar 8 are ground away by the grindstone chamfering machine 49.

Furthermore, the very thin hardened M/discoloration layer and minute burrs/burrs caused by the grinding wheel chamfering machine 49 on the end face of the bar 8 are removed by the brush chamfering machine 51.
High quality bar steel 8 can be produced online. Additionally, online production has the advantage of completely eliminating rework costs.

"Second Example" The present inventor conducted an experiment to confirm the relationship between the cutting temperature of a bar steel with a grindstone cutting machine and the end surface quality.

The experimental results are shown in Figures 7 to 10.
For 0ue long steel, room temperature, 200”C, 600℃,
The tests were carried out at a temperature of 900°C, and the steel types were 80M420 and 5UJ2. The experiment was conducted to examine burrs (Fig. 7), burrs (Fig. 8), and surface roughness (Fig. 9) on the end face of the bar steel.
This was done by measuring the hardness and hardness (Figure 10).

As shown in Fig. 7, the streamer has no length at room temperature at 6°0°C, and becomes slightly longer at 900°C, which deteriorates. As shown in Figure 8, the burr elongation is small at room temperature and is 200
As shown in Figure 9, the six-face roughness ←→, which deteriorates slightly when the temperature exceeds ℃, does not differ from room temperature to 600℃, and is 14
It is less than a μ ring, which is very good. As for the hardness +t-m, as shown in FIG. 10, the hardness of the end face increases due to grinding at 200°C or lower, but is good at 600°C or higher.

In addition, from the experimental results of 0 or more in which the depth of the hardened layer was about 20 .mu.-, it was found that the suitable temperature range for obtaining good end face quality was as follows.

200° C. (suitable temperature range≦600° C.) “Third Example” The present inventor conducted a confirmation experiment under the same conditions as in the second example regarding the relationship between the cutting temperature of bar steel with a grindstone cutting machine and the cutting efficiency. The experimental results are shown in Figure 11. There is no difference in the cutting efficiency ←-P day → from room temperature to 200℃, and at 200℃
At temperatures above 400° C., the performance improves as the temperature increases, and is clearly good at temperatures above 400°C.

Suitable temperature range ≧ 400° C. "Effects of the Invention" As described above, the electrically controlled rolling equipment of the present invention includes a primary cooling bed that is provided at the rear stage of the rolling machine of a long steel rolling line, and is equipped with a rapid feed device for long steel. A fixed and movable grindstone cutting machine is installed after the primary cooling bed and cuts multiple bars at the same time, and a grindstone surface is installed after the grindstone cutting machine and is installed on the lifting beam and the lifting side end. a chamfering machine and a brush chamfering machine; an aligning table having a feed roller for aligning the end of the bar at the other end of the secondary cooling bed; and a grinding wheel surface provided at the other end of the secondary cooling bed. Although it is equipped with a chamfering machine and a brush chamfering machine, it is possible to warmly cut the long steel with a grindstone cutting machine, which improves the edge crystal quality, and the grindstone cutting is performed while maintaining high cutting efficiency of the long steel, so it is possible to produce by online cutting. According to the present invention, it is possible to provide electrically controlled rolling equipment with high performance.Furthermore, according to the present invention, the i! [Because it removes the hardened layer and the discolored layer, there are no off-line rework costs, and it has excellent effects such as making it possible to produce high-quality long steel that can be shipped immediately to users.] be.

70,,lifting beam, 72,,, vertically moving horizontally moving bee

[Brief explanation of the drawing]

FIG. 1 is a layout diagram showing an embodiment of the long steel rolling equipment of the present invention;
Fig. 2 is a side view of the primary cooling bed, Fig. 3 is a side view showing the grindstone cutting machine, Fig. 4 is a front view showing the grindstone chamfering machine, Fig. 5 is a front view showing the brush chamfering machine, Fig. 6 is a front view showing the aligning table and the secondary cooling bed, Figs. 7 to 10 are characteristic diagrams showing the experimental results of end surface quality, and Fig. 11 is a characteristic diagram showing the experimental results of cutting efficiency. It is. 111. rolling mill, 3. ,． Primary cooling bed, 4,...
No. 1 line, 5. ,,No, 2 lines, 6,7. ,,
Grindstone cutting machine, 8191 long bar, 9. ,． secondary cooling bed,
24,,,Fast forwarding device, 30.31. ,, Rollgang, 33.34. ,, proper position adjustment means, 49.
. , Grinding wheel chamfering machine, 51 ,, Brush chamfering machine, 52.
,. Aligning table, 64,...Roller, Fig. 1 7I21 C 80th box 0 9CX) ℃ Fig. 9 Eli! 100 χ℃ 甑Ω ■Ω 1■nlIC

Claims (1)

[Claims] A primary cooling bed installed downstream of the rolling mill in a long steel rolling line and equipped with a rapid feed device for long steel; A primary cooling bed installed downstream of this primary cooling bed for cutting multiple long steel bars at the same time. A fixed and movable grindstone cutting machine, a secondary cooling bed that is installed after the grindstone cutting machine and cools the bar while sending it to finishing equipment using an elevating beam and an elevating and horizontally moving beam; and one side of this secondary cooling bed. a grindstone chamfering machine and a brush chamfering machine provided at one end; an aligning table having a feed roller to align the ends of the bar at the other end of the secondary cooling bed; A long steel rolling equipment characterized by comprising: a grindstone chamfering machine and a brush chamfering machine provided at an end.