JPS60116713A - Hot descaling apparatus of billet - Google Patents

Abstract

PURPOSE:To recover the cutting capacity, to reduce the number of spare brushes, and to increase the production efficiency of a titled apparatus by rotating the upper and the lower horizontal brush roll shaft in the direction opposite to each other to recover the descaling capacity. CONSTITUTION:The brush rolls 39 revolving in the direction opposite to each other by a driving source 9 are allowed to approach by the action of cylinders 37 to descale a traveling billet A. When the cutting capacity decreases due to the abrasion and deformation of the brush, positioning rods 34b of a roll supporting member 8 and an automatically detachable universal joint 46 are released. The supporting member 8 is rotated through an angle of 180 deg. by the rotation of a shaft 32 driven by a rotating gear 5, and the rods 34b and the joint 46 are again coupled to start descaling. The revolving direction of a brush 39a is reversed in this way, and the cutting capacity is recovered. Accordingly, since the number of spare brushes can be reduced and the stop time is reduced, the production efficiency is increased. The exchange of the brush 39b is carried out by moving a carriage 6 to the outside of the line.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot scale removal device for removing scale attached to the surface of a steel billet, for example, in front of a steel billet heating furnace.

BACKGROUND OF THE INVENTION In general, steel slabs are heated at high temperatures for a long period of time in a heating furnace, so that primary scale is formed on their surfaces.

This -order scale is removed by a descaling device before rolling, but in Si-added steel, which has poor descaling properties, a low melting point eutectic substance called 2Fe0-81o2 (7earite) is generated in the scale, and this Scale containing eutectic substances is intricately entangled in the steel base and acts as a cushion against the impact during descaling, so it remains unremoved and is pushed into the steel billet during rolling, resulting in stripes on the product. Causes scale flaws in the pattern.

Therefore, in order to produce Si-containing hot-rolled sheets with excellent surface properties, mechanical descaling is performed using the above-mentioned wire brush roll type scale removal device immediately after the billet heating furnace, and high-pressure water descaling is performed as necessary. I am doing it. However, the brush roll 1 is rotated for a long time as shown in Figures 1 and 2, with the rotation direction of the brush roll being either in the direction opposite to the running direction of the steel billet or in the opposite direction. When cutting the -th scale of a steel billet (), the tip 2a of the brush wire 2 of the brush roll 1 is deformed as shown in FIG. Scale flaws begin to appear. If the brush wire 2 is deformed as described in ``2'' and loses its cutting ability, it is conceivable to rotate the brush roll 1 in the opposite direction to restore the shape of the wire 2 to its original shape.
If the brush roll 1 is rotated in the opposite direction, the desired cutting capacity cannot be maintained, and the production line must be stopped and replaced with a new brush roll, which reduces production efficiency. In addition, as production resumes with a new brush roll, the deformed part of the deformed brush roll 5 is dressed off-line, so the overall number of brush rolls required increases, and the number of spare brush rolls in stock must be increased. There was a big problem if I didn't do it.

OBJECTS OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a method for quickly recovering the cutting ability of the scale to a predetermined level even if the cutting ability of the scale for steel slabs is reduced. It is an object of the present invention to provide an apparatus for hot descaling of steel slabs, which can increase the production efficiency of steel slabs and does not increase the required number of brush rolls and therefore the number of spare brush rolls in stock.

2. In order to achieve the above object, the present invention rotates the brush roll about 180 degrees with respect to the roll support member, so that the contact surface of each wire of the brush of the brush roll with the steel piece is fixed. I tried to change it. That is, a pair of stands are provided on a cart that can be moved in and out of a billet production line, and a roll support member is provided on each opposing surface of the pair of stands so that it can be rotated in a substantially vertical plane. The cart is provided with a rotational drive device that rotates the roller by 180 degrees relative to the pair of stands, and each stand is provided with a positioning device that positions each roll support member with respect to each stand. A pair of upper and lower brush rolls each having brushes for removing steel billet scales are installed so as to be movable up and down, and also have a joint detachably connected to one end of the rotating shaft of each of the rolls to rotate the brush rolls. The structure was such that a drive source for driving the vehicle was provided on the trolley.

According to configuration 1, when the brush roll is rotated (rotated in the normal direction with respect to the stand) to remove scale from the steel piece, the wire of the brush of the roll is deformed, and the scale cutting capacity reaches the predetermined capacity. If it becomes even lower, move the trolley outside the production line and connect the drive source joint to each brush roll.
After separating from the rotation axis and releasing the positioning of each roll support member with respect to each stand by the positioning device, the rotation drive device rotates the brush roll together with the roll support member 180 degrees with respect to the stand, and replaces the upper and lower brush rolls, The positioning device positions each roll support member with respect to each stun V, and each joint of the drive source is connected to the rotating shaft of each brush roll, and the cart is returned to the production line and each brush roll is rotated by the drive source. Then, the scale is removed from the steel piece again (by rotating it in the opposite direction relative to the roll support member), so the contact surface of the brush against the steel piece changes, and the scale cutting ability can be restored to approximately the original predetermined cutting ability. The removal work can be done well and continuously. In addition, each time the brush is deformed and the scale cutting capacity is lower than the specified capacity, the roll is moved 1 time against the stand.
Rotating the brush roll by 80 degrees eliminates the need to stop the production line and replace the brush roll, improving production efficiency, eliminating the need to dress deformed brush rolls offline, and reducing the overall number of brush rolls required. There is no increase in the number of spare brush rolls in stock. In addition, since the brush roll is first removed from the production line using a trolley before the roll is replaced, it is completely possible to prevent accidents caused by the rotation of the roll support when the roll comes into contact with steel pieces or roller cables in the production line. In addition, roll replacement work can be performed easily.

EXAMPLE X1 The present invention will be specifically explained below based on the examples shown in FIGS. 4 to 6.

As shown in FIG. 4, the apparatus for hot scale removal of steel slabs according to this embodiment includes a pair of rails 10° 10 provided on a base 19 in a direction perpendicular to the flow direction of the production line. A truck 6 that moves forward and backward on the rail 10.10 is provided, and this truck 6
``Secondly, a pair of stands 7゜7 are erected, and a roll support member 8 is provided on the opposing surface of each stand 7 in a degree of rotation within a substantially vertical plane, and both roll support members 8, 8 are mounted on the above-mentioned pair of stands 7゜7. A rotary drive device 5 for rotating 180 degrees with respect to the stand 7.7 is provided on the trolley 6, and a positioning device such as a positioning cylinder 34 for positioning each roll support member 8 with respect to each stand l''7 is provided on each stand 7. At the same time, brush meals 39, 39 for removing steel billet scale are installed on both roll support members 8, 8 so as to be able to move up and down and freely rotate,
Furthermore, a drive source 9 is provided on the trolley 6 and has a joint 46 that is detachably connected to one end 42 of the rotating shaft of the brush roll 39 and rotates the roll 39.39. 39 and 39 respectively,
The scale attached to both the upper and lower surfaces of the steel piece A is removed.

The truck 6 has the plurality of wheels 11. ....

11 on the rails 10, 10, the base recess 19a
It moves forward and backward by driving the cylinder 12 inside. This cylinder 12 has a cylinder case approximately at the center thereof supported by a trunnion 14 so as to be able to swing freely on the floor, and the tip of a cylinder rod 15 being pivotally connected to one end of the bottom surface of the truck via a bracket 18. There is. Therefore, by expanding and contracting the shilling rod 15, the trolley 6 is positioned inside the production line to perform hot scale removal of the steel slab A, while the trolley 6 is moved outside the production line to replace the upper and lower brush rolls 39. I have to. Furthermore, since the cylinder 12 is pivotally supported with respect to the floor surface by the trunnion 14, even if the moving direction of the trolley 6 changes from the initial position due to wear of the rail 10, 10, etc., the operation of the cylinder 12 The movement of the trolley 6 is not affected in any way.

Each stand 7 on the trolley 6 supports the spindle 32 of each roll support member 8 in its center via a bearing 44, and also supports each brush roll 39 above and below the spindle 32. The joint 4 of the drive source 5] connected to one end 42 of the rotating shaft of the
6.4G is provided rotatably. Furthermore, this joint 4
6.46 upper and lower positioning cylinders 34. ．． There are 34.

The cylinder 34 is driven by the piston 34& to move the tip of the cylinder nose 3.41+ in and out from the side surface of the roll support member of the stand 7, and fit into the four positioning parts 36 recessed below the roll support member 8. The roll support member 8 is positioned relative to the stand 7.

Each roll support member 8 has a support shaft 32 integrally protruding from the center of its outer surface, that is, the side surface of the stand, so that it is pivotally supported by the stand 7. Inside this roll support member 8 are roll reduction cylinders 37.
37 are provided so that each rod 37a expands and contracts in opposite directions, and a cylinder 37b is fixed to the tip of each rod 37a, and the ends of the rotating shafts 40, 42 of the brush roll 39 are connected to the bearings 3, respectively.
The reduction cylinder 3 is rotatably supported via 8 and 38.
The brush rolls 39, 39 are driven by the drives 7, . . . , 37.
are brought into contact with and separated from the steel qA to adjust the gap between them and the surface of the steel piece A.

As shown in FIG. 5, each brush roll 39 installed between the roll support members 8 and 8 is provided with a large number of wires 1 made of heat-resistant and wear-resistant stainless steel or the like projecting in the radial direction. The brush 39a contacts one surface of the steel piece A to remove scale from the steel piece A. One end 42 of the rotating shaft of this brush roll 39 is an automatic attachment/detachment type that passes through the cylinder 37 at the tip of the rod of the reduction cylinder 37 and projects into a recess 7a provided on the side surface of the stand. universal joint 46
The connection is made detachable by the expansion/contraction operation of the boss 43.

The base end of each joint 46 is connected to the drive source 9, and when the drive source 5 is driven, the flange rolls 39 and 39 are driven to rotate through the joints 46 and 46. Note that a groove 41 cut in the axial direction is formed at each tip of the one end 42 of the rotating shaft, and by fitting the convex portion of the universal joint 46 into the groove 41, the rotation shaft can be rotated in a predetermined direction. This ensures that the rotating shaft rotates reliably.

Further, the spindle portion 32 of one roll support member 8 passes through the stand 7 and a gear 31 is fitted onto the end portion of the spindle portion 32 so as not to be relatively rotatable.
It consists of That is, as shown in FIG.
0, and the lower end 21 of the cylinder case of the cylinder 22 for rotation of the roll support member is pivotally connected to the connector 2 (), and the tip of the piston rod 23 of the cylinder 22 is an arm that protrudes laterally from the sector gear 30. It is pivotally connected to section 26. This sector gear 30 has a lower end connected to the pin 28.
It is rotatably supported by a bearing frame 29, and a gear portion 30a is carved on its upper circumferential surface so that the gear 31 and this gear portion 30a mesh with each other. Therefore, when the piston rod 23 of the cylinder 22 moves in and out of the cylinder case, the sector gear 30 swings around the axis of the pin 28 via the arm portion 26, and the gear 31 moves through the sector gear 30. Therefore, the roll support member 8 is rotated approximately 180 degrees forward and backward around the axis of the support shaft portion 32. Note that both roll support members 8
, 8 are prevented from relative rotation by the brush rolls 39, 39, so if one roll support member 8 is rotationally driven by the rotation drive device 5, both members 8, 8 rotate integrally.

Now, the apparatus for hot scale removal of steel pieces having the above structure 1 operates as follows.

That is, the steel billet A is guided by the front and rear table rolls (not shown) arranged before and after the steel billet traveling direction of the above device.
travels in a direction penetrating the plane of the paper in FIG. When it is detected by, for example, a photoelectric detector that the tip of the steel piece A has reached a predetermined position, the brush roll lowering cylinders 37°..., 3'7 are activated to lower the second brush roll 39. While stirring, remove the lower brush roll 3.
9, and brush 39a of each brush roll 39,
..., adjust 39a to the optimum position with respect to the steel piece A,
The brushes 39a, . . . , 39a are always pressed against the upper and lower surfaces of the steel piece A with a predetermined contact pressure. Then, the brush rolls 39, 39 are rotated as shown in FIG. 1 at a speed faster than the running speed of the steel piece A, and the surface of the steel piece A is
The attached scale is completely removed with the brushes 39a, . . . , 39a.

When removing scale from the steel slab Δ by rotating each roll 39 for a long time, each roll 3
The wire of the brush 39a of No. 9 is bent, and the scale cutting ability is reduced. Therefore, the degree of curvature of the wire of this brush 39a, that is, the amount of deformation of the wire is detected, and the rotation of the brush roll 39.degree. 39 is stopped. That is, in view of the fact that the load on the brush roll 39 decreases as the amount of wire deformation of the brush 39a increases, the load on the brush roll 39 is determined by a detection value detected by a rotary torque meter;
The rolling reduction ratio of the brush roll 39 is calculated based on the detection value detected by a load cell (not shown), and it is determined whether the load on the brush roll 39, that is, the amount of wire deformation of the brush 39a interferes with the cutting ability of the scale. When a predetermined value is reached, the presence or absence of steel pieces A on the front and rear table rolls of the hot scale removal device is detected by a photoelectric detector, etc., and if there is no steel piece A, the brush roll 39, 39 drive source 9 is stopped. Therefore, we set the trolley 6 at the position where the production line center X and the roll center are aligned and the scale is removed.
It is moved along the rail to a roll exchange position outside the production line where the roll exchange center Y and the roll center match.

Then, each automatic detachable universal joint 46 is separated from one end 42 of the rotating shaft of each brush roll 39, and the rod tip of each positioning sill 34 is removed from each recess 36 of the roll support member 8, and then the roll support member is rotated. The brush ring 22 is operated to integrally rotate both roll support members 8, 8 about 180 degrees forward and reverse around the axis of the support shaft in a substantially vertical plane, and the upper and lower brush rolls 39 and 39 are exchanged. After the rod tip of each positioning sill 34 is inserted into each of the four parts 36 of the roll support member 8 for positioning, each automatically detachable universal joint 46 is connected to one end 42 of the rotating shaft of the brush roll 39. After returning the trolley 6 to the scale removal position in the production line again, the drive source 9 is activated to move the upper and lower brush rolls 39 and 30 at a speed faster than the billet traveling speed by the table roll.
As shown in the figure, the steel billet A is scaled by rotating in the traveling direction of the billet A.

In this way, the amount of deformation of the brush 39a of the brush roll 39 is detected, and when the brush 39a is deformed by a predetermined amount and the cutting ability is lower than the predetermined ability, the roll support member B,
If the brush roll 39.39 is rotated about 180 degrees in a substantially vertical plane along with 8, and then the brush roll 39.39 is rotated again to remove the scale of the steel piece A.
The direction of rotation of the brush roll 39 with respect to the roll support member 8 is reversed, and the direction of the force applied to each wire of the seven brushes 39a is reversed, the contact surface of each wire with the steel piece changes, and the amount of deformation of the wire is changed. becomes smaller, the cutting ability of the scale on the steel billet A recovers to approximately the original predetermined ability, and the scale can be removed successfully again, so there are no scale defects on the product and the quality of the product is significantly improved. can be made to In addition, continuous production can be performed without stopping the production line to replace the brush roll 39, and since the brush roll 39 does not deform, there is no need for draining the deformed part. The required number of brush rolls 39 can also be reduced, and the number of spare brush rolls in stock can also be reduced. Also, due to the rotation of the roll support member 8°8 within a substantially vertical plane, the upper and lower brush rolls 39, 3
9 is replaced, the space for this rotation is approximately the area of the vertical cross section occupied by the upper and lower brush rolls 39, 39 when the steel piece A is held between them, and therefore the replacement work does not require much space. Miniaturization of the entire device without the need for

can be achieved. Furthermore, when replacing the brush rolls 39 and 39, the replacement position is removed from the production line by the trolley 6, so for example 7 brush rolls 3
Even if the tip of the steel billet A is located near the roll 35, an accident such as the tip of the billet A coming into contact with the roll 35 can be reliably prevented.

In addition, although the present invention has mainly been described immediately after the heating furnace for hot rolling of steel billets, it is of course not limited to this, and is applicable to a wire brush roll applied to a finish scale flaker before a continuous hot finishing mill. Not only can it be applied to steel plate surface treatment equipment that removes rust generated on the surfaces of continuously cast steel billets, blooming rolled steel billets, and even heat-rolled steel plates. Needless to say, the present invention can also be applied to surface grinding processing lines using rotating brushes.

In addition, in Fig. 4, the -moon stand 7.7 is installed along the horizontal direction so that the horizontal direction becomes the vertical direction, and the R
1. To remove scale from a long piece of steel. But that's fine.

[Brief explanation of the drawing]

Fig. 1 is a side view showing scale removal of a steel piece using a brush roll, Fig. 2 is a sectional view of the brush roll deformed after being used for a long time, Fig. 3 is an enlarged side view of the deformed brush wire wire, and Fig. Figure 4 is a vertical cross-sectional view of a hot scale removal device for steel billets according to an embodiment of the present invention, and Figure 5 is taken along v-v in Figure 4.
6 is a sectional view taken along the line Vl--Vl in FIG. 4. 5... Rotation drive device, 6... Dolly, 7... Stand, butt... Roll support member, 9... Drive source, 34...
・Positioning cylinder, 39...Brush roll, 39a
...flange, 46...automatic detachable universal joint. Patent applicant Kobe Steel Co., Ltd. Representative Patent attorney 2 Aoyama Sogai

Claims (1)

[Claims] (1) A pair of stands is provided on a trolley that can be freely moved in and out of the billet production line, and a roll support member is provided on each opposing surface of the pair of stands so as to be rotatable in a substantially vertical plane, and both roll support members are provided on opposite sides of the pair of stands. A rotary drive device is provided on the trolley to rotate 180 degrees with respect to the pair of stands, and a positioning device is provided on each stand to position each roll support member with respect to each stand, and both roll support members are provided with: A pair of upper and lower brush rolls each having brushes for removing steel billet scales are installed so that they can be raised and lowered and rotated freely, and are also installed at one end of the rotating shaft of each of the rolls. An apparatus for hot descaling of steel pieces, characterized in that a drive source for rotationally driving the brush roll is provided on the cart, and has a joint that is connected to the descaling unit.