JP2003205308A - Introducing guidance device for rolled wire rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To produce a high-quality product by preventing the generation of scratches and flushes on the surface by always smoothly guiding a rolled wire rod. <P>SOLUTION: A plurality of roller sets 31 composed of a pair of rotary rollers 30, 30 which are rotationally driven are arranged at a prescribed arranging pitch on a three-dimensional circular-arcuate curve S. In the roller set 31, the axial centers C<SB>1</SB>, C<SB>1</SB>of both the rotary rollers 30, 30 are lined up on the radial lines H from the center point G of the circular-arcuate curve S. The arranging pitch of each roller set 31 and the diameter of the rotary roller 30 are set so that a pickup angle formed with an abutting line which passes through an abutting point where the tip of the rolled wire rod passing through the roller set 31 on the upstream side is brought into contact with the rotary roller 30 of the roller set 31 and the axial center C<SB>1</SB>of the rotary roller 30 and the radial lines H passing through the axial centers C<SB>1</SB>, C<SB>1</SB>of both the rotary rollers 30, 30 which comprise the roller set 31 is ≤20°. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device for guiding a rolled wire rod along a three-dimensional arc curve.

[0002]

2. Description of the Related Art As shown in FIG. 7, a reference rolling line 12 for a rolled wire rod 11 that has passed through a heating furnace 10 includes, for example, a rough row 13, a first intermediate row 14 and a second intermediate row 15 each having a plurality of rolling mills. A first line 19 configured to feed the rolled wire rod 11 toward the poling reel 18 via the first sizing mill 16 and the second sizing mill 17 is linearly connected to the reference rolling line 12, and The rolling wire 11 is moved to the laying head 2 via the finishing rolling mill 39 or the block mill 20 and the sizing mill 21.
The 2nd line 23 supplied toward 2 is connected via the change line 24 branched from the standard rolling line 12. Then, the rolled wire rod 11 rolled to a predetermined diameter through the reference rolling line 12 is configured to be distributed to the first line 19 or the second line 23 according to the required product size.

The second line 23 is different from the standard rolling line 12 in terms of installation space, factory layout, etc.
The position is set not only in the lateral direction intersecting with the reference rolling line 12 but also in the height direction. Therefore, the reference rolling line 12 in the change line 24
Each of the connecting portions with the second line 23 is formed in a three-dimensional curved arc shape, and the guiding and guiding device 25 disposed at each connecting portion is configured to smoothly guide and guide the rolled wire rod 11. . That is, this guidance and guidance device 25
Is configured by arranging a plurality of roller sets 27 (see FIG. 8) including a pair of free rollers 26, 26 on the arc curve so that the rolled wire rod 11 passes between the free rollers of each roller set 27. Each time the rolled wire rod 11 passes through each roller set 27, the traveling direction is changed so that the rolled wire rod 11 is guided in an arc curve shape.

[0004]

As described above, in the roller set 27 arranged on the three-dimensional arc curve, the leading end of the rolled wire rod 11 that has passed through the upstream roller set 27 is in the downstream roller set 27. After abutting on one free roller 26 (outer side in the radial direction of the arc curve), it is guided between the two rollers 26, 26. In this case, the tip of the wire rod is free roller 26.
The roller itself was cracked by the impact when it abuts against the roller 26, the roller 26 was worn in a short period of time, and seizure of the bearing also occurred, resulting in poor durability. As shown in FIG. 8, the magnitude of the impact applied when the tip of the wire rod contacts the free roller 26 is such that the tip of the rolled wire rod 11 that has passed through the upstream roller set 27 is one of the roller sets 27 on the downstream side. Contact point A that contacts the free roller 26 and contact line B passing through the axis C of the free roller 26.
And both free rollers 2 constituting the roller set 27.
The pickup angle θ formed by the reference line D passing through the axes C and C of the reference numerals 6, 26, and the larger the pickup angle θ,
The impact will be greater. That is, the standard rolling line 12
If the bending angle α (see FIG. 7) of the change line 24 is small, the curvature of the arc curve where each roller set 27 is arranged becomes gentle, and the pickup angle θ can be set small, and the free roller 26 can be set to a small value. It was possible to cope with the guide guidance device 25 used.

However, when the bending angle α of the change line 24 with respect to the reference rolling line 12 has to be set large due to the factory layout and the like, the pickup angle θ becomes large and the above-mentioned problem occurs frequently. In the actual situation, the guide device 25 using the free roller 26 cannot provide smooth guide and guide of the rolled wire rod 11. It is possible to reduce the pickup angle θ by increasing the diameter of the free roller 26, but in this case, the weight of the roller becomes heavy, so that the free roller 26 may not rotate properly when guiding the wire rod. This causes a problem that an oyster flaw is chronically generated on the surface of the wire. Similarly, it is pointed out that the burr of the rolled wire rod 11 adheres to the surface of the roller and increases the number of burrs.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to suitably solve the above-mentioned problems, and it always guides a rolled wire rod smoothly to prevent the occurrence of scratches and burrs on the surface, thereby providing a high quality product. It is an object of the present invention to provide a guide device for a rolled wire rod capable of producing the above product.

[0007]

[Means for Solving the Problems] Overcoming the above-mentioned problems,
In order to achieve the intended purpose, a guide device for a rolled wire rod according to the present invention is a guide device for guiding a rolled wire rod along a three-dimensional arc curve, and a rotation that can guide the rolled wire rod by sandwiching it. A plurality of roller sets, each of which is composed of a pair of driven rotating rollers, are arranged at a predetermined disposition pitch on the arc curve, and in each roller set, the axes of both rotating rollers are:
It is set so as to be aligned on a radial line extending radially from the center point of the circular arc curve, and the tip of the rolled wire rod passing between both rotary rollers in the upstream roller set is the radial direction of the circular arc curve in the downstream roller set. The pick-up angle formed by the abutting point that abuts on the outer rotating roller and the abutting line passing through the axis of the rotating roller and the radiation passing through the axes of the rotating rollers forming the roller set is 20 ° or less. The arrangement pitch of each roller set and the diameter of the rotating roller are set so that

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a guide apparatus for a rolled wire according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. It should be noted that the same or similar members and portions that have already been described in the conventional technique described with reference to FIGS. 7 and 8 are denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 shows a schematic structure of a guide and guide apparatus according to the present embodiment. The guide and guide apparatuses 28 and 29 are shown in FIG.
Are arranged at the connecting portions of the change line 24, the reference rolling line 12 and the second line 23, respectively, as described in the prior art with reference to FIG. Only the configuration of the upstream guide guide device 28 arranged at the connection between the reference rolling line 12 and the change line 24 will be described, and the change line 24 and the second line 23 will be described.
The same members of the downstream guiding apparatus 29 arranged at the connecting portion with and are denoted by the same reference numerals.

As shown in FIG. 2, the guide guide device 28 on the upstream side includes a plurality of roller sets 31 composed of a pair of rotating rollers 30 and 30 which are rotationally driven in mutually opposite directions.
On the base 32, they are arranged at a predetermined pitch along a three-dimensional arc curve S described later. The base 32
Is configured to be movable in the horizontal left-right direction orthogonal to the reference rolling line 12 by the forward and reverse biasing of the fluid pressure cylinder 33, and the wire rods of the rotating rollers 30, 30 facing each other in the roller set 31 located on the most upstream side. The introduction part is configured to be positioned at a connection position facing the reference rolling line 12 and a retracted position separated therefrom, and by positioning the base 32 at the connection position, the rolling wire rod 1 traveling on the reference rolling line 12
1 is guided by the guide device 28.
Further, a guide member 34 that is aligned with the reference rolling line 12 when positioned at the retracted position is provided on the base 32, and the rolling wire rod 11 is provided with the guide member 34 via the guide member 34.
9 is configured to be guided. The second line 23
With respect to the downstream guide device 29 arranged at the connection part with, since it is not necessary to contact and separate the second line 23,
The base 32 of the device 29 is fixedly arranged at a fixed position where the opposing wire rod outlets of the rotary rollers 30, 30 in the roller set 31 located on the most downstream side are aligned with the second line 23.

Here, a water cooling zone 35 is provided between the guide guide device 28 on the upstream side and the guide guide device 29 on the downstream side, and is guided and guided by the guide guide device 28 so as to branch from the reference rolling line 12. The rolled wire rod 11 is cooled when passing through the water cooling zone 35.

As shown in FIG. 3, the rotating rollers 30 and 30 constituting each roller set 31 are configured so that they are independently driven to rotate by a motor 36, and the peripheral speed of both rollers 30 and 30 is increased. Is set to be slightly higher than the traveling speed of the rolling wire rod 11 in the reference rolling line 12, and is configured to smoothly guide the rolling wire rod 11 introduced between the rotating rollers 30 and 30 toward the downstream side. . In addition,
The interval between the facing portions (wire rod introduction portion) through which the rolled wire rod 11 passes in both rotary rollers 30, 30 is set to be larger than the diameter of the rolled wire rod 11 (wire rod diameter +5 mm or so).
In addition, the rotary rollers 30 and 30 constituting each roller set 31
The motors 36 and 36 are assembled into a unit by being attached to the mounting base 37.
The roller set 31 is configured to be detachably disposed via the. In FIG. 2, reference numeral 38 indicates a guide member that is arranged between the roller sets 31 and that guides the rolled wire rod 11.

Next, the positional relationship of each roller group 31 in the guide device 28 will be described with reference to FIG. As shown in this figure, when the reference rolling line 12 is used as the X axis, a point F on the downstream side at a distance L of a tilt angle θ ₁ and an elevation angle θ ₂ from a reference point O set on the X axis is used. , On the XYZ plane where there is an upstream point E on the X axis that is at a distance L from the reference point O, and is on the opposite side of the reference point O with a line segment connecting the points E and F interposed therebetween. At, a center point G of an arc having a radius R passing through the points E and F is set. With respect to the arc curve S having the radius R centered on the center point G, in each roller set 31, the center position between the axes of the rotating rollers 30, 30 faces the arc curve S, and both rotating rollers 30 The axes C ₁ , C ₁ of the axes 30, 30 are arranged so as to be aligned on the radiation H extending radially from the center point G. The guide device 28 according to the embodiment is suitable for guiding the rolling wire rod 11 along a three-dimensional arc curve S set with an inclination angle θ ₁ ≧ 15 ° and an elevation angle θ ₂ ≧ 5 °. used. The radius R of the arc curve S is changed according to the bending angle α of the change line 24 with respect to the reference rolling line 12.

Further, the tip of the rolled wire rod 11 passing between the rotary rollers 30 and 30 of the upstream roller set 31 hits the rotary roller 30 located radially outside the circular arc S of the downstream roller set 31. The contact line B passing through the contact point A and the axis C ₁ of the rotating roller 30 and the radiation H passing through the axis C ₁ , C ₁ of the rotating rollers 30, 30 constituting the roller set 31 concerned. The arrangement pitch of the roller sets 31 (both rotary rollers 3) is set so that the pick-up angle θ (see FIG. 8) is 20 ° or less, preferably 15 ° or less.
(Distance between 0 and 30 facing centers) and rotating roller 30
The diameter (roller diameter) of is set. Incidentally, when the diameter of the rotary roller 30 is 285 mm, the arrangement pitch of the roller set 31 is 360 mm in order to keep the pickup angle θ at 15 ° or less.

[0015]

Operation of the Embodiment Next, the operation of the guide device according to the embodiment constructed as described above will be described.

In the state where the upstream guide guide device 28 is positioned at the retracted position, the reference rolling line 12 is
The rolling wire rod 11 traveling in the direction is guided to the first line 19 through the guide member 34 arranged on the base 32,
The rolled wire rod 11 is rolled to a predetermined diameter via the first sizing mill 16 and the second sizing mill 17 and then supplied to the poling reel 18.

Next, when changing the product size, the guide guide device 28 on the upstream side is positioned at the connection position, and the guide device 28 is connected to the reference rolling line 12. In this case, the rolling wire rod 11 running on the reference rolling line 12 is guided and guided by each roller set 31 of the guiding and guiding device 28 and runs downstream along the three-dimensional arc curve S to reach the water cooling zone 35. Be guided. Then, the rolled wire rod 11 that has passed through the water cooling zone 35 is guided and guided by each roller set 31 of the guide guide device 29 on the downstream side, travels on the downstream side along the three-dimensional arc curve S, and the second line Guided to 23. The rolled wire 11 is rolled to a predetermined diameter via the block mill 20 and the sizing mill 21 and then supplied to the laying head 22.

The pick-up angle θ when the tip of the rolled wire rod 11 guided and guided by each roller set 31 comes into contact with the rotating roller 30 is set to 20 ° or less as described above. The impact force exerted on the roller 30 can be suppressed to be small, and the durability of the roller 30 can be improved. Further, since both rotary rollers 30, 30 are rotationally driven at a peripheral speed that follows the traveling speed of the rolled wire rod 11, the rolling wire rod 11 is always guided smoothly to prevent blemishes and burrs on the surface. Can be prevented and high quality products can be produced.

Here, when it is necessary to set a large bending angle α of the change line 24 with respect to the reference rolling line 12 due to the factory layout and the like, the rotating roller 30 is used.
By increasing the diameter of the
It can be suppressed to 0 ° or less. Even if the diameter of the rotating roller 30 is increased in this way, the roller 30 is positively driven by the motor 36, so that the roller 30 does not cause a rotation failure and the rolling wire rod 11 is always smoothly guided and guided. can do. Further, since the bending angle α can be set to be large, the extension length of the change line 24 can be set to be short, and thus the entire rolling line can be shortened.

In the embodiment, each rotary roller 30 is independently driven to rotate by the motor 36. Therefore, when one of the motors 36 fails, the brake of the motor 36 is released to rotate the rotary roller 30. Can be dealt with by setting the state of being able to rotate freely. Further, since each roller set 31 is unitized and configured to be attachable to and detachable from the base 32, replacement work in the event of a failure or the like can be performed in a short time, and loss time due to replacement can be reduced. obtain.

[0021]

[Experimental Example 1] The roller diameter is 285 mm at the connecting portion of the change line with the bending angle set to 25 ° with respect to the reference rolling line.
In the conventional example in which the guide guide device using the free roller is arranged and in the example of the invention in which the guide guide device using the rotating roller that is rotationally driven with the same diameter is arranged, the scratches caused by passing through each device 5 shows the index of the invention example when the conventional example is 100. In addition, regarding the occurrence of burr defects that occur when passing through both guide guide devices,
The index of the invention example when the conventional example is set to 100 is shown in FIG. Regarding the occurrence of burrs, the roller diameter should be 70
Data of a comparative example using a free roller having a size of mm is also shown.

As can be seen from FIG. 5, it has been confirmed that if the roller diameter is the same, the use of a positively driven rotating roller can remarkably reduce the occurrence of scratches. Further, as is clear from FIG. 6, even with a guide device using a free roller, it is possible to reduce the occurrence of burrs and defects by reducing the roller diameter as in the comparative example, but it is still considerable. Ibaraki has a flaw. On the other hand, it has been confirmed that the occurrence of burrs can be completely prevented by using the rotating roller that is positively driven as in the invention example.

In the embodiment, the rotary rollers constituting the roller set are independently driven to rotate by the motors, but a pair of rotary rollers are driven to rotate in opposite directions by one motor. You can Further, the number of roller sets forming the guide device is not limited to the number in the embodiment, and is appropriately set according to the arrangement pitch of the roller sets, the roller diameter, and the like. Further, the distance between the pair of rotating rollers may be adjustable.

[0024]

As described above, according to the guide device for a rolled wire according to the present invention, since the rotary rollers constituting each roller group are rotationally driven, the rollers always rotate smoothly, The rolled wire rod can be smoothly guided and guided, and it is possible to suppress or completely eliminate the occurrence of scratches and burrs and to produce high quality products. Further, by setting the pickup angle when the tip of the rolled wire rod contacts the rotating roller to 20 ° or less, the impact at the time of contact can be reduced, and the durability of the roller can be improved. Since each rotary roller is driven to rotate independently by a motor, if any motor fails, it can be easily dealt with by replacing or repairing only the motor.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a state in which a guide device according to an embodiment of the present invention is arranged at both connecting portions of a change line.

FIG. 2 is a plan view showing an upstream guide device according to an embodiment.

FIG. 3 is a front view showing a roller set according to the embodiment.

FIG. 4 is an explanatory diagram showing an arrangement relationship of each roller set of the guide device according to the embodiment.

FIG. 5 is a graph showing the results of evaluating the prevention of oyster defects in Experimental Example 1.

FIG. 6 is a graph showing a result of evaluating prevention of occurrence of burr defects according to Experimental Example 2.

FIG. 7 is a first line and a second line with respect to a reference rolling line.
It is a schematic explanatory drawing which shows the structure to which a line is connected.

FIG. 8 is an explanatory diagram showing a pickup angle at which a tip of a rolled wire rod contacts a free roller.

[Explanation of symbols]

11 Rolled Wire Rod 30 Rotating Roller 31 Roller Set 36 Motor A Contact B Contact Line C ₁ Rotating Roller Shaft Center G Center Point H Radiation S Arc Curve θ Pickup Angle

Claims (2)

[Claims] 1. A guide device for guiding a rolled wire rod (11) along a three-dimensional arc curve (S), comprising a pair of rotationally driven rollers capable of guiding the rolled wire rod (11) while sandwiching the rolled wire rod (11). Roller set (31) consisting of rollers (30, 30)
Are arranged on the arc curve (S) at a predetermined pitch, and in each roller set (31), the axes (C ₁ , C ₁ ) of both rotating rollers (30, 30) are It is set so as to be aligned on the radial line (H) extending radially from the center point (G) of the curve (S), and both rotary rollers (30, 30) in the roller set (31) on the upstream side.
The contact point (A) at which the tip of the rolled wire rod (11) that has passed through the space (30) abuts on the rotating roller (30) located radially outside the circular arc curve (S) in the roller set (31) on the downstream side and The rotating roller
The contact line (B) passing through the shaft center (C ₁ ) of (31) and the roller set (3
Each of the roller groups is so arranged that the pickup angle (θ) formed by the radiation (H) passing through the shaft centers (C ₁ , C ₁ ) of both rotating rollers (30, 30) constituting 1) is 20 ° or less. A guide device for a rolled wire rod, characterized in that an arrangement pitch of (31) and a diameter of a rotating roller (30) are set. 2. Both rotating rollers in the roller set (31)
2. The guide device for a rolled wire rod according to claim 1, wherein each of the (30, 30) is independently driven to rotate by a motor (36).