JP5102326B2 - Mechanical descaling device - Google Patents

Description

  The present invention relates to a mechanical descaling device that mechanically removes a scale generated on the surface of a metal material, particularly a steel material.

  In the manufacturing process of steel, for example, in the case of casting, heating, hot rolling and other heat treatments, the steel is exposed to a high-temperature oxidizing atmosphere, so that scale is generated on the surface thereof. This scale consists of an oxide layer. If steel is processed with this scale left untreated, the quality of the finished product will be reduced due to the remaining scale. For this reason, the descaling process which removes a scale is generally performed as the next process of the process of generating a scale.

  In the conventional descaling process, a high-pressure water injection device that injects high-pressure water is provided, high-pressure water is injected onto the surface of the steel, and the scale on the steel surface is scraped off by the impact force of the high-pressure water.

  However, when the adhesion between the scale and the steel is large, the scale on the steel surface cannot often be completely removed even by high-pressure water injection. For this reason, it has been necessary to increase the pressure of the high-pressure water or increase the flow rate of the high-pressure water. As the flow rate of the steel increases, the temperature of the steel decreases, so that a secondary problem arises that the heating temperature of the steel in the heating furnace needs to be increased in advance.

  In addition, in order to carry out descaling with high-pressure water, a wastewater treatment facility that treats wastewater containing scale is necessary, so an increase in cost for scale removal and an increase in scale removal facility were inevitable. .

  In order to avoid such a problem of scale removal by high-pressure water, a mechanical descaling device has been proposed in which a mechanical striking force is applied to the steel surface and the scale is removed by this striking force.

  For example, Japanese Patent Laid-Open No. 9-271831 (Patent Document 1) proposes a mechanical descaling device that applies an impact force to the surface of steel with a rotated chain.

  Japanese Patent Laid-Open No. 2007-44728 (Patent Document 2) proposes a mechanical descaling device that has a brush roll in contact with the steel surface and controls the position of the brush roll according to the irregularities on the steel surface. ing.

Japanese Patent Laid-Open No. 9-271831 JP 2007-44728 A

  However, the mechanical descaling device in Patent Document 1 has a problem that it is difficult to keep the hitting force by the chain constant, and the degree of wear of the chain by hitting the steel surface is large.

  Similarly, the mechanical descaling device in Patent Document 2 also has a problem that the degree of wear of the brush roll is large because the brush roll is pressed against the steel surface and rotated.

  The present invention has been made in view of the problems in such a conventional mechanical descaling apparatus, and can reliably remove the scale of the surface of steel and other objects, as well as the member used for scale removal. An object of the present invention is to provide a mechanical descaling device that makes it possible to reduce the degree of wear.

  Hereinafter, means for solving the above-described problems will be described using reference numerals used in the “Embodiments of the Invention”. These reference signs are added only to clarify the correspondence between the description of “Claims” and the description of “Embodiments of the Invention”. It should not be used to interpret the technical scope of the invention described in.

In order to achieve the above object, the present invention provides a wheel (152) rotatable around an axis, driving means (160, 151) for rotating the wheel (152), and a radius of the wheel (152). At least one descaling piece having at least one shaft (153) disposed at a distance from the outer peripheral surface of the wheel (152) outward in the direction, and a through hole (155) centered on the axis. 154), and the descaling piece (154) is fitted into the shaft (153) through the through hole, and the descaling piece (154) the said diameter of the through hole (155) of) greater than the outer diameter of the shaft (153), said wheel upper and lower (152) At least one of them is provided with a pressing roller (180) whose outer periphery is in contact with the object (170) to be descaled, concentrically with the wheel (152), and the descaling piece (154 is the shaft ( A mechanical descaling device (100) is provided that rotates around 153) within a range of X ± A [mm] .
X: outer periphery of the pressing roller
A: Predetermined positive number

  The descaling piece (154) has, for example, a cylindrical shape.

The mechanical descaling apparatus according to the present invention may include two or more shafts (153) and two or more descaling pieces (154) for each of the shafts (153). The descaling pieces (154) are offset in the direction of the axial center of the wheel (152) with an interval from each other for each of the shafts (153).

  The descaling piece (154) is preferably mounted at a different position on each of the shafts (153) so as to cover the entire surface of the descaling object (170).

  The rotation speed of the wheel (152) is preferably controlled according to the material and surface temperature of the descaling object (170).

  The mechanical descaling apparatus according to the present invention may further include moving means (110, 120) for moving the wheel (152) along the object (170) to be descaled.

  The mechanical descaling apparatus according to the present invention comprises a pressing means (140) for pressing the descaling piece (154) against an object (170) for descaling, and a control means for controlling the pressing force of the pressing means (140). And can be further provided.

  According to the mechanical descaling device of the present invention, each descaling piece rotates with the wheel, and centrifugal force is applied by the rotation of the wheel. By applying centrifugal force, each descaling piece is displaced radially outward of the wheel, so that a greater striking force can be applied to the descaling object and the scale can be scraped off more reliably. it can.

  Also, each descaling piece is made of, for example, hard steel, so that the wear resistance is increased and the replacement frequency is reduced compared with the brush roll used in the conventional mechanical descaling device. As a result, the running cost can be reduced.

1A is a plan view of the mechanical descaling apparatus according to the first embodiment of the present invention as viewed from above, and FIG. 1B is a front view of the mechanical descaling apparatus according to the first embodiment of the present invention. FIG. 1C is a side view of the mechanical descaling device according to the first embodiment of the present invention viewed from the side. 2A is a plan view of the descaling unit in the mechanical descaling apparatus according to the first embodiment of the present invention as viewed from above, and FIG. 2B is a front view of the descaling unit as viewed from the front. . 3A and 3B are schematic views showing the positional relationship among the wheel, the shaft, and the descaling piece in the mechanical descaling apparatus according to the first embodiment of the present invention. FIG. 4 is a schematic diagram showing the positional relationship between the wheel, the shaft, and the descaling piece in the mechanical descaling apparatus according to the first embodiment of the present invention. FIG. 5A is a plan view of the descaling unit in the mechanical descaling apparatus according to the second embodiment of the present invention as viewed from above, and FIG. 5B is a front view of the descaling unit as viewed from the front. . FIG. 6 is a schematic diagram illustrating an arrangement example of descaling pieces on each of the six shafts in the mechanical descaling apparatus according to the second embodiment of the present invention. FIG. 7A is a plan view of the descaling unit in the mechanical descaling apparatus according to the third embodiment of the present invention as seen from above, and FIG. 7B is a front view of the descaling unit as seen from the front. .

(First embodiment)
1A is a plan view of the mechanical descaling apparatus 100 according to the first embodiment of the present invention as viewed from above, FIG. 1B is a front view of the mechanical descaling apparatus 100 as viewed from the front, and FIG. (C) is the side view which looked at the mechanical descaling apparatus 100 from the side.

  As shown in FIGS. 1A, 1B, and 1C, a mechanical descaling apparatus 100 according to this embodiment includes a descaling apparatus main body 110, a slide base 120, a swing arm 130, and the like. The air cylinder 140, the descaling unit 150, and the drive motor 160 are configured.

  The descaling device main body 110 is a table that functions as a base of the mechanical descaling device 100 according to the present embodiment, and has a rectangular parallelepiped shape.

  On the rear side of the descaling apparatus main body 110, a support base 111 having a triangular longitudinal section is attached to prevent the body from falling.

  The slide table 120 is attached on the top surface of the descaling apparatus main body 110. The slide table 120 is attached to the descaling apparatus main body 110 so as to be slidable in the length direction A of the descaling apparatus main body 110.

  The swing arm 130, the air cylinder 140, the descaling unit 150, and the drive motor 160 are mounted on the slide table 120, and slide with the slide table 120 in the length direction A of the descaling apparatus main body 110.

  The swing arm 130 is mounted on the slide table 120 so as to be rotatable about the rotation axis.

  The swing arm 130 includes a first arm 131 extending to one of the rotation center axes and a second arm 132 extending at an obtuse angle to the first arm 131 on the other rotation axis. The first arm 131 is longer than the second arm 132.

  The drive motor 160 is attached above the swing arm 130, and the swing arm 130 can rotate with respect to both the slide table 120 and the drive motor 160.

  The base end of the air cylinder 140 is attached to the slide base 120, and the tip that is the end on the side that expands and contracts is attached to the tip of the second arm 132. For this reason, according to the expansion and contraction of the air cylinder 140, the swing arm 130 performs a rotational motion around its rotation center axis. Specifically, in FIG. 1A, when the air cylinder 140 is extended, the swing arm 130 is rotated counterclockwise around the rotation center axis, and conversely, when the air cylinder 140 is contracted, the swing arm 130 is swung. The arm 130 rotates clockwise about its rotation center axis.

The descaling unit 150 is attached to the lower side of the tip of the first arm 131 . Descaling unit 150 is rotatably attached to the first arm 131, by receiving a driving force of the driving motor 160, and is configured to rotate relative to the first arm 131.

  2A is a plan view of the descaling unit 150 as viewed from above, and FIG. 2B is a front view of the descaling unit 150 as viewed from the front.

As shown in FIGS. 2A and 2B, the descaling unit 150 includes a rotation center shaft 151 that is rotatably attached to the first arm 131 , and is fixed to the rotation center shaft 151. A wheel 152, six shafts 153, and six descaling pieces 154.

  The wheel 152 is formed of a cylindrical main body portion 152A and a pair of outer diameters larger than the outer diameter of the main body portion 152A at both ends (the upper end and the lower end in FIG. 2B) of the main body portion 152A. The flange portion 152B.

  The wheel 152 receives a driving force from the driving motor 160 via the rotation center shaft 151 and rotates around the rotation center shaft 151.

  Each of the six shafts 153 is fixedly attached between the pair of flange portions 152B. That is, each of the six shafts 153 is arranged in a state of being spaced apart from the outer peripheral surface of the main body portion 152A on the outer side in the radial direction of the wheel 152. Specifically, each of the six shafts 153 is arranged at an equal circumferential angle on the circumference of an imaginary circle having a diameter larger than the outer diameter of the main body portion 152A.

  The descaling piece 154 has a cylindrical shape and is made of a hard steel material. The descaling piece 154 is formed with a through-hole 155 that extends in the length direction of the descaling piece 154 around its axis.

  3A and 3B are schematic views showing the positional relationship among the wheel 152, the shaft 153, and the descaling piece 154.

  As shown in FIGS. 3A and 3B, the descaling piece 154 is fitted into the shaft 153 through the through hole 155.

  Further, as shown in FIGS. 3A and 3B, the diameter of the through hole 155 of the descaling piece 154 is set larger than the outer diameter of the shaft 153. For this reason, the descaling piece 154 can rotate with the shaft 153 as the center and one point of the inner wall of the through hole 155 in contact with one point of the outer periphery of the shaft 153.

  The mechanical descaling apparatus 100 according to this embodiment having the above-described structure performs the following operation.

  The mechanical descaling apparatus 100 according to the present embodiment is disposed to face the slab 170 (see FIGS. 3A and 3B), and the scale (iron oxide) generated on the surface 170A of the slab 170. ) Shall be removed.

  First, the drive motor 160 is operated. The driving force of the driving motor 160 is transmitted to the rotation center shaft 151, and the wheel 152 starts to rotate around the rotation center shaft 151.

  In a stage before the wheel 152 starts to rotate, as shown in FIG. 3B, each descaling piece 154 is spaced from the shaft 153.

  When the wheel 152 starts to rotate, centrifugal force acts on each descaling piece 154. That is, a force directed outward in the radial direction about the axis of the rotation center shaft 151 acts on each descaling piece 154.

  For this reason, as shown in FIG. 3A, each descaling piece 154 has an outer periphery of the shaft 153 at one point on the inner wall of each through-hole 155 on the radial direction centering on the axis of the rotation center shaft 151. Rotates with the wheel 152 in contact with one point. That is, each descaling piece 154 rotates together with the wheel 152 while being displaced in a direction away from the rotation center axis 151.

  As the descaling pieces 154 rotate together with the wheels 152 in this manner, the descaling pieces 154 sequentially collide with the surface 170A of the slab 170, and give an impact force to the surface 170A of the slab 170. As a result, the scale of surface 170A is scraped off.

  FIG. 4 is a schematic diagram showing the positional relationship between the wheel 152, the shaft 153, and the descaling piece 154.

  As shown in FIG. 4, when the distance from the center of the rotation center axis 151 to the center of the shaft 153 is T, the radius of the shaft 153 is U, the diameter of the descaling piece 154 is D, and the diameter of the through hole 155 is S. The maximum distance M between the outer periphery of each descaling piece 154 and the center of the rotation center shaft 151 while each descaling piece 154 rotates with the wheel 152 is expressed by the following equation.

  M = T + U + (S-2U) + (DS) / 2

  When the scale in the scale removal target area (area where each descaling piece 154 contacts) on the surface 170A of the slab 170 is scraped off, the slide table 120 is moved in the A direction.

  As a result, the wheel 152 moves to the adjacent area, and each descaling piece 154 rotates as described above, so that the scale in this area is scraped off.

  Alternatively, the slide table 120 can be moved in the A direction at a constant speed during the scale removal operation.

  Similarly, by moving the slide table 120 along the surface 170A of the slab 170, each descaling piece 154 applies an impact force to the entire area of the surface 170A and removes the scale in the entire area of the surface 170A. Can do.

  Even after the scale is removed, the scale scraped off from the surface 170A of the slab 170 may adhere to the surface 170A due to electrostatic force. For this reason, after removing the scale, it is possible to perform a step of blowing off the scale attached to the surface 170A by injecting high-pressure air onto the surface 170A of the slab 170.

  As described above, according to the mechanical descaling apparatus 100 according to the present embodiment, each descaling piece 154 rotates with the wheel 152, and centrifugal force is applied by the rotation of the wheel 152. By applying the centrifugal force, each descaling piece 154 is displaced radially outward of the wheel 152. Therefore, each descaling piece 154 can apply a larger impact force to the surface 170A of the slab 170 compared to a case where the descaling piece 154 is not displaced radially outward of the wheel 152, and more reliably the surface of the slab 170. The scale of 170A can be scraped off.

  In addition, since each descaling piece 154 is made of hard steel, compared to the brush roll used in the conventional mechanical descaling device, it has a large wear resistance and can reduce the replacement frequency. As a result, running cost can be reduced.

  The mechanical descaling apparatus 100 according to the present embodiment is not limited to the above configuration, and various modifications can be made.

  By providing a control device (not shown) to the driving motor 160 that rotates the wheel 152, for example, depending on various factors such as the material of the slab 170, the temperature of the surface 170A of the slab 170, the amount of scale generated, etc. The rotational speed of the wheel 152 can be adjusted.

  For example, when the hardness of the slab 170 is large, the rotation speed of the wheel 152 can be increased according to the hardness of the slab 170. Further, when the temperature of the surface 170A of the slab 170 is high, the rotational speed of the wheel 152 is increased, and the time for each descaling piece 154 to contact the surface 170A of the slab 170 is shortened. It is possible to suppress the wear degree of the piece 154.

  In the mechanical descaling apparatus 100 according to the present embodiment, the air cylinder 140 functions as a pressing unit that presses each descaling piece 154 against the surface 170A of the slab 170. As each descaling piece 154 removes the scale of the surface 170A of the slab 170, each descaling piece 154 receives a reaction force from the surface 170A of the slab 170 as a reaction of the impact force. The reaction force may cause each descaling piece 154 to float from the surface 170A of the slab 170. By pressing each descaling piece 154 against the surface 170A of the slab 170 using the air cylinder 140, each descaling piece 154 is lifted. The floating of the piece 154 for use can be prevented.

  Further, a control device (not shown) for controlling the degree of expansion / contraction of the air cylinder 140 is provided so that the hardness of the slab 170, the temperature of the surface 170A of the slab 170, the size or hardness of the descaling piece 154, and the hardness of the generated scale. Depending on other factors, it is possible to control the degree of expansion and contraction of the air cylinder 140, that is, the pressing force that presses each descaling piece 154 against the surface 170 A of the slab 170.

  The mechanical descaling apparatus 100 according to the present embodiment is configured to include six shafts 153, but the number of shafts 153 is not limited to six. Any number greater than or equal to 1 can be selected.

  In the mechanical descaling apparatus 100 according to the present embodiment, one descaling piece 154 is attached to each of the six shafts 153, but the number of descaling pieces 154 attached to each shaft 153 is as follows. It is not limited to 1. Any number of 1 or more can be selected (see the second embodiment described later).

  In the mechanical descaling apparatus 100 according to the present embodiment, each descaling piece 154 is configured to have a cylindrical shape, but the shape of the descaling piece 154 is not limited to a cylindrical shape. As long as the through-hole 155 can be formed, a shape having a cross section of any shape such as a polygon, an ellipse, a straight line, or a combination of curves can be adopted.

  In the mechanical descaling apparatus 100 according to the present embodiment, the surface of each descaling piece 154 is flat, but the surface of each descaling piece 154 has a vertical direction, a horizontal direction, a vertical and horizontal direction, or an oblique direction. It is also possible to provide a groove in the direction and form a knurled shape. By providing a groove on the surface of each descaling piece 154, the removal ability of the scale can be enhanced.

(Second embodiment)
5A is a plan view of the descaling unit 150A in the mechanical descaling apparatus according to the second embodiment of the present invention as viewed from above, and FIG. 5B is a front view of the descaling unit 150A as viewed from the front. It is.

  In the mechanical descaling apparatus 100 according to the first embodiment, one descaling piece 154 is attached to each shaft 153, whereas in the mechanical descaling apparatus according to the present embodiment, Three descaling pieces 154A, 154B, and 154C are attached to each shaft 153.

  That is, as shown in FIG. 5B, three descaling pieces 154A, 154B, and 154C are attached to each shaft 153 in this order from the top.

  Note that four flange portions 152B are formed on the wheel 152 corresponding to the three descaling pieces 154A, 154B, and 154C, and each of the three descaling pieces 154A, 154B, and 154C Each of the four flange portions 152B is disposed.

  Of the three descaling pieces 154A, 154B, and 154C, the descaling pieces 154A and 154B have the same length, but the descaling piece 154C has a length for descaling. It is set shorter than the length of the pieces 154A, 154B.

  For example, the length ratio of the three descaling pieces 154A, 154B, and 154C is set to 4: 4: 1.

  When a plurality of descaling pieces 154A, 154B, and 154C are arranged on each shaft 153 as in this embodiment, the positions of the descaling pieces 154A, 154B, and 154C in the height direction on each shaft 153 are aligned. As a result, in the space between the descaling pieces 154A, 154B, and 154C, none of the descaling pieces 154A, 154B, and 154C is in contact with the surface 170A of the slab 170. Unable to remove scale.

  For this reason, as shown in FIG. 6, in the mechanical descaling apparatus according to the present embodiment, the positions of the descaling pieces 154A, 154B, and 154C in the height direction are shifted with respect to each of the six shafts 153. The descaling pieces 154A, 154B, and 154C of the shaft 153 can cover the entire surface 170A of the slab 170.

  6 shows six shafts 153-1, 153-2, 153-3, 153-4, 153-5, and 153-6 (for example, clockwise when viewed from above) in the mechanical descaling apparatus according to the present embodiment. FIG. 5 is a schematic view showing an example of the arrangement of descaling pieces 154A, 154B, and 154C in each of FIG.

  For example, in the shafts 153-2, 153-4, and 153-6, three descaling pieces 154 </ b> A, 154 </ b> B, and 154 </ b> C are arranged in this order from the top.

  For example, the length of the descaling pieces 154A and 154B in the axial direction of the rotation center shaft 151 is set to 40 mm, and the length of the descaling piece 154C is set to 10 mm. The space between each descaling piece 154A, 154B, 154C is set to 20 mm.

  The descaling piece 154B on the shaft 153-4 is arranged to be 1.2 mm (3% of the length of the descaling piece 154B) higher than the descaling piece 154B on the shaft 153-2. The descaling piece 154B in −6 is arranged 1.2 mm higher than the descaling piece 154B in the shaft 153-4.

  In the shafts 153-1, 153-3, and 153-5, three descaling pieces 154C, 154A, and 154B are arranged in this order from the top.

  The descaling piece 154B on the shaft 153-3 is disposed 1.2 mm higher than the descaling piece 154B on the shaft 153-1. Similarly, the descaling piece 154B on the shaft 153-5 is disposed on the shaft 153-3. And 1.2 mm higher than the descaling piece 154B in FIG.

  By arranging the descaling pieces 154A, 154B, and 154C for the six shafts 153 as shown in FIG. 6, the total area of the surface 170A of the slab 170 is set by 18 descaling pieces 154A, 154B, and 154C Can be covered.

  In the mechanical descaling apparatus according to the present embodiment, three descaling pieces 154A, 154B, and 154C are arranged for each shaft 153, but the number of descaling pieces is not limited to three. Any number greater than or equal to 2 can be selected.

  In the mechanical descaling apparatus according to the present embodiment, among the three descaling pieces 154A, 154B, and 154C, the lengths of the descaling pieces 154A and 154B are different from the length of the descaling 154C. However, the lengths of the descaling pieces 154A, 154B, and 154C can be set to be the same, or all the lengths of the three descaling pieces 154A, 154B, and 154C are different from each other. It is also possible to set it.

  Further, in the mechanical descaling apparatus according to the present embodiment, the descaling pieces in the three shafts 153-1, 153-3, 153-5 or the three shafts 153-2, 153-4, 153-6 The arrangement of 154A, 154B, and 154C is the same, but the arrangement of the descaling pieces 154A, 154B, and 154C on each of the shafts 153-1 to 153-6 is arbitrary. The arrangement of the descaling pieces 154A, 154B, and 154C in all the shafts 153 may be different.

(Third embodiment)
7A is a plan view of the descaling unit 150B in the mechanical descaling apparatus according to the third embodiment of the present invention as viewed from above, and FIG. 7B is a front view of the descaling unit 150B as viewed from the front. It is.

  The descaling unit 150B in the mechanical descaling apparatus according to the present embodiment is compared with the descaling unit 150A (FIGS. 5A and 5B) in the mechanical descaling apparatus according to the second embodiment. The difference is that a pressing roller 180 is additionally provided. Except for the point provided with the pressing roller 180, the descaling unit 150B in the mechanical descaling apparatus according to the present embodiment has the same structure as the descaling unit 150A in the mechanical descaling apparatus according to the second embodiment. Yes.

  The pressing roller 180 has a cylindrical shape and is made of hard steel. The pressing roller 180 is formed with a through hole 181 centered on the axis. The pressing roller 180 is rotatably and concentrically attached to the rotation center shaft 151 directly above the wheel 152 through the through hole 181.

  When each descaling piece 154A, 154B, 154C contacts the surface 170A of the slab 170, the pressing roller 180 similarly contacts the surface 170A of the slab 170 at its outer peripheral surface 182.

  When the outer periphery of the pressing roller 180 is X [mm], the descaling pieces 154A, 154B, and 154C rotate within a range of X ± A [mm].

  For example, when the outer periphery of the pressing roller 180 is set to 168 mm, the descaling pieces 154A, 154B, and 154C draw a rotation trajectory within a range of 168 ± 5 mm. The number of ± 5 mm is uniquely determined by the diameter of the shaft 153, the outer diameter of the descaling pieces 154A, 154B, and 154C, the inner diameter of the through hole 155, and other factors.

  According to the mechanical descaling apparatus according to the present embodiment, the pressing roller 180 is brought into contact with the surface 170A of the slab 170, whereby the distance between each descaling piece 154A, 154B, 154C and the surface 170A of the slab 170 is set. This makes it possible to maintain a constant scale, and the scale removal by the descaling pieces 154A, 154B, 154C can be performed uniformly.

  In the mechanical descaling apparatus according to the present embodiment, the pressing roller 180 is disposed immediately above the wheel 152. However, the pressing roller 180 may be disposed directly below the wheel 152, or directly above and directly below the wheel 152. It is also possible to arrange them on both sides.

100 Mechanical descaling device 110 according to the first embodiment of the present invention 110 Descaling device main body 120 Slide stand 130 Swing arm 131 First arm 132 Second arm 140 Air cylinder 150 Descaling unit 150A Second embodiment of the present invention Descaling unit 150B in the third embodiment of the present invention Descaling unit 151 Rotation center shaft 152 Wheel 152A Body portion 152B Flange 153 Shaft 154 Descaling piece 155 Through hole 160 Driving motor 170 Slab 170A Slab surface 180 Pressing Outer surface of roller 181 through-hole 182

Claims (7)

A wheel that can rotate around its axis;
Driving means for rotating the wheel;
At least one shaft disposed radially outward of the wheel and spaced from the outer peripheral surface of the wheel;
At least one descaling piece having a through-hole centered on the axis;
A mechanical descaling device comprising:
The descaling piece is fitted into the shaft through the through hole,
The diameter of the through hole of the descaling piece is much larger than the outer diameter of the shaft,
At least one of the upper and lower sides of the wheel, a pressing roller whose outer periphery is in contact with the object to be descaled is disposed concentrically with the wheel.
The mechanical descaling apparatus, wherein the descaling piece rotates around the shaft within a range of X ± A [mm] .
X: outer periphery of the pressing roller
A: Predetermined positive number   The mechanical descaling apparatus according to claim 1, wherein the descaling piece has a cylindrical shape. Two or more shafts, and two or more descaling pieces for each of the shafts,
3. The mechanical descaling according to claim 1, wherein the descaling pieces are mounted at different positions in the direction of the axial center of the wheel with a space between each of the shafts. apparatus.   4. The mechanical desizing according to claim 3, wherein the descaling piece is shifted in mounting position on each of the shafts so as to cover the entire surface of the descaling object. Scaling device. Rotational speed of the wheel, depending on the material and the surface temperature of the object of descaling, mechanical descaling device according to any one of claims 1 to 4, characterized in that intended to be controlled. Mechanical descaling device according to any one of claims 1 to 5, further comprising a moving means for moving along the wheel to the object of descaling. A pressing means for pressing the descaling piece against an object to be descaled;
Control means for controlling the pressing force of the pressing means;
The mechanical descaling device according to any one of claims 1 to 6 , further comprising: