JP5444019B2 - Guide device - Google Patents

Description

  The present invention relates to a guide device for guiding a rolled material to a rolling mill.

  For example, in a rolling mill that rolls wire, rod, and steel, guide devices are provided in the vicinity of the inlet and outlet of the rolling mill. This guide device has a through-hole for guiding a rolled material (hereinafter, a portion where the through-hole is formed is referred to as a hole-type portion), and the rolled material that moves at high speed is accurately applied to a pair of rolling rolls in a rolling mill. In addition to guiding, the guide device provided at the outlet has a role of guiding the rolling material to the next rolling mill so as to maintain the posture of the rolled material after rolling, or twisting the rolled material . For this reason, the guide device and its support member are required to have high strength and rigidity in the vertical and horizontal directions, the vertical and horizontal directions, and the twist direction.

  For this reason, conventionally, as shown in FIG. 9, a guide device 101 has a rigid rest bar in which a guide portion 103 for guiding a rolled material is inserted into a rigid guide box 102 or connected to a support frame or the like. A structure has been adopted in which the guide portion is inserted into a through hole provided in itself (not shown) and pressed and fixed by a bolt 105 orthogonal to the pass line (see, for example, Patent Documents 1 to 5). .) Moreover, when using the rolling roll which has a some caliber, the multi-row guide apparatus which has arrange | positioned the several hole type part in parallel according to the some caliber is used.

Japanese Utility Model Publication No. 48-49241 Japanese Utility Model Publication No. 62-151006 JP 09-239427 A Japanese Patent Laid-Open No. 10-175012 JP-A-10-263661

  However, the above-described conventional guide device has the following problems to be improved. That is, since the guide device is required to have high support strength and rigidity as described above, the guide box and the rest bar that support the guide portion are large in size and weight. In particular, since the multi-row guide device in which a plurality of hole-shaped portions are arranged in parallel has a large size, a guide box and a rest bar that firmly support the multi-row guide device are further increased in size and weight. However, since the caliber of the rolling roll is worn with use, it is necessary to remove or replace the rolling roll. Moreover, it is necessary to replace the rolling rolls by changing the size of the rolled material. When removing and reassembling the rolling roll, it is necessary to remove and reassemble the guide device placed in the vicinity of the rolling mill.

  However, as described above, the conventional guide box, rest bar, and the like are heavy, so that not only the cost of these parts increases, but also the removal and reassembly work of the guide device takes a long time. Furthermore, since conventional guide boxes, rest bars, and the like are large in size, it is difficult to secure a space for detaching and reassembling work, and the work takes longer. For this reason, the interruption period of operation of a rolling mill becomes long, and it also becomes a problem also about the point of ensuring safety at the time of work. Therefore, as in Patent Documents 3 and 5 described above, automation of work using a hydraulic device or the like has been proposed, but the manufacturing and maintenance costs are considerably increased.

  Further, as described above, the rolled material is guided at high speed and high accuracy by the guide device and is twisted in some cases, so that a high working force is applied to the guide device. For this reason, when the misalignment or vibration of the rolled material becomes excessive, not only the guide device but also the rolling roll of the rolling mill is seriously damaged. Therefore, a means for minimizing damage when such an abnormal situation occurs is desired.

  Furthermore, since the temperature of the rolling roll rises due to contact with the hot rolling material, it is necessary to cool the rolling roll with a coolant. In this case, the cooling effect can be enhanced if the cooling liquid is supplied so as to be as close as possible to the contact portion with the rolling material in the caliber of the rolling roll. However, as shown in FIG. 10, since the conventional guide device 101 is large in size, it becomes difficult to bring the nozzle manifold 109 for injecting the cooling liquid close to the contact portion with the rolled material of the caliber, thereby enhancing the cooling effect. It becomes difficult.

  In addition, when the coolant directly hits the rolled material carried out from the rolling roll, the temperature of the rolled material is rapidly reduced. For this reason, conventionally, a drain wiper is installed at the lower part of the nozzle manifold 109 (not shown) so that the coolant sprayed on the rolling roll does not directly hit the rolling material. However, such a draining wiper also requires a support mechanism, which is not only costly, but also requires removal and reassembly when repairing the rolling roll. The interruption period of operation becomes longer.

  Therefore, an object of the present invention is to reduce the weight and size, thereby greatly reducing the manufacturing cost and the mounting / dismounting time, and enhancing the cooling effect between the rolling roll and the guide device, and the cooling liquid can be directly applied by a simple structure. It is an object of the present invention to provide a guide device that can be prevented from hitting a rolled material.

  In order to solve the above problems, the present inventor, as a result of diligent research, replaced the conventional structure in which the guide portion is inserted and supported in the through hole, and the left and right outer surfaces of the guide portion and the left and right end portions of the lower surface, It has been found that high strength and rigidity can be secured in the vertical and horizontal directions, the vertical and horizontal rotations, and the twist direction around the pass line, and the present invention has been completed.

  That is, the feature of the guide device according to the present invention is that it includes a pair of guide holders facing each other along the axial direction of the rolling roll, and a guide portion that is divided into two parts vertically connected to the guide holder. is there. The guide holder is fixed to a support member provided near the entrance or exit of the rolling roll. Each of the guide holders has an upper horizontal plane that forms an L shape with each other when viewed from the direction of the pass line, and an inner vertical plane that is orthogonal to the upper horizontal plane. The guide part has one or a plurality of hole mold parts for guiding the rolled material. Flange portions projecting outward are provided on the left and right outer surfaces of the guide portion, respectively, and the left and right outer surfaces of the guide portion and the left and right end portions of the lower surface are respectively connected to the upper horizontal surface and the inner vertical surface of the guide holder. Close to. Moreover, the flange part of the said guide part is bolt-coupled to the end surface located in the opposite side to the said rolling roll of the said guide holder, respectively.

  It is preferable that the tensile strength of the bolt that joins the flange portion of the guide portion to the end face of the guide holder is set to a strength at which the bolt is damaged when a force in a rolling direction of a predetermined level or more is applied to the guide portion.

  A flange portion of the guide portion and an end hole of the guide holder to which the flange portion is bolted are provided with opening holes into which retraction guide pipes or rods for retreating the guide portion in the rolling direction can be inserted, When the guide portion is moved in a direction away from the rolling roll, the retraction guide pipe or bar is opened on the end surface of the guide holder through the opening hole provided in the flange portion. More preferably, it is configured to be inserted into the hole and to be detached from the guide holder while sliding on the retraction guide pipe or bar.

  Further, on the upper side surface of the guide part, a groove is formed on both sides of the hole mold part and communicated with the front and rear end faces of the guide part along the direction of the pass line. More preferably, a weir that crosses the groove is provided in the vicinity of the end surface of the guide portion that is located on the opposite side of the rolling roll.

  By omitting the guide box and the like for inserting the guide part and supporting the left and right outer surfaces and the lower left and right end parts of the guide part in close contact with a pair of guide holders, the vertical and horizontal directions and the vertical and horizontal directions The weight and size of the guide device can be greatly reduced while ensuring high strength and rigidity in the rotation and twist directions. As a result, the cost of the guide device can be reduced, and the work time for removing and reassembling the guide device placed in the vicinity of the rolling mill when repairing or replacing the rolling roll can be greatly reduced. The work safety can be increased by expanding the work space.

  In addition, it becomes easy to bring the nozzle manifold and the like for injecting the coolant close to the contact portion of the caliber with the rolled material, and the cooling effect of the rolling roll can be improved. Furthermore, since there is no member covering the upper surface of the guide part, it is possible to pour the coolant directly on the upper surface of the guide part, thereby improving the cooling effect of the guide device and reducing seizure and wear of the hole part. Can do.

  The flange portion projecting from the left and right outer surfaces of the guide portion is bolted to the end face located on the opposite side of the rolling roll of the guide holder, and further provided in the flange portion in the opening hole provided in the end face of the guide holder. By inserting a retraction guide pipe or the like while passing through the opening hole, the guide portion can be retreated from the guide holder while sliding on the retraction guide pipe or the like. Therefore, the guide part can be separated from the rolling roll easily and safely without supporting the weight of the guide part.

  By setting the tensile strength of the bolt that joins the flange portion of the guide portion to the end face of the guide holder, the strength of the bolt is damaged when a force in the rolling direction of a predetermined level or more is applied to the guide portion. And damage to the guide device can be minimized.

  On the upper side of the guide part, a concave groove is formed on both sides of the hole part and communicated with the front and rear end faces of the guide part along the direction of the pass line. By providing a weir that crosses the concave groove in the vicinity of the end face located at, it is possible to prevent the coolant applied to the upper surface of the guide portion from being directly applied to the rolled material carried out from the guide device.

It is a rear view of a guide apparatus. It is sectional drawing of a guide apparatus. It is a top view of a guide apparatus. It is a side view of a guide apparatus. It is a top view of the guide apparatus which inserted the pipe for evacuation guidance. It is a top view of the guide apparatus which shows the state which is removing the guide part from the guide holder. It is a perspective view of a guide part. It is a side view of the nozzle manifold which supplies a cooling fluid to a rolling roll. It is a rear view of the guide apparatus by a prior art example. It is a side view of the nozzle manifold which supplies a cooling fluid to the rolling roll by a prior art example.

  The configuration of the guide device according to the present invention will be described with reference to FIGS. FIG. 1 shows a guide device 1 viewed from the opposite side of a rolling mill (not shown), and FIG. 2 shows a cross section orthogonal to the pass line of this guide device. The guide device 1 includes a pair of guide holders 2 that face each other along the axial direction of the rolling roll, and a guide portion 3 that is divided into two vertically. The guide holder 2 is fixed to a support member 4 provided near the entrance or exit of the rolling roll.

  The support member 4 is, for example, a gate-shaped housing installed near the entrance or exit of the rolling roll, and has support columns 41 on the left and right sides of the pass line, and a pair of guide holders on the support columns. 2 is fixed. The support member 4 is not limited to the above-described configuration, and for example, a pair of support columns 41 may be held on a chock or the like that holds a rolling roll. The guide holder 2 is formed in an L-shaped cross section having an upper horizontal surface 21 that forms an L shape with each other and an inner vertical surface 22 that is orthogonal to the upper horizontal surface when viewed from the direction of the pass line. As shown in FIGS. 3 and 4, the pair of guide holders 2 are fixed to the inner side surface of the support column 41 by three bolts 8 whose heads are buried in the inner vertical surface 22.

  The guide part 3 has two hole mold parts 31 arranged in the horizontal direction penetrating in the pass line direction, which are left and right outer surfaces, and projecting outward on the end surface opposite to the rolling roll. A flange portion 32 is provided. Note that the number of the hole mold portions 31 is not limited to two, and may be one or three or more. As described above, the guide portion 3 is divided into two parts in the vertical direction. As shown in FIGS. 1 and 3, etc., the guide portion 3 is integrally coupled by bolts 33 at the six positions of front and rear, left and right, and the center position. Yes.

  As shown in FIGS. 1 and 2, the left and right outer surfaces and the lower left and right end portions of the guide portion 3 are in close contact with the inner vertical surface 22 and the upper horizontal surface 21 of the guide holder 2, respectively. The flange portion 32 is coupled to the end surface of the guide holder on the side opposite to the rolling roll by two bolts 5. As shown in FIG. 2, the left and right end portions of the lower surface of the guide portion 3 and the upper horizontal surface 21 of the guide holder 2 may be brought into close contact with each other via a plate-like bushing 6. As will be described later, when the guide part 3 is detached from the guide holder 2 while being slid, the sliding is improved, and the wear of the sliding surface between the guide part and the guide holder is prevented by replacing the bushing. Because it can. The tensile strength of the bolt 5 that joins the flange portion 32 of the guide portion 3 to the end face of the guide holder 2 is set to a strength at which this bolt is damaged when a force in a rolling direction exceeding a predetermined value is applied to the guide portion. It is.

  Further, as shown in FIG. 5, a retraction guide pipe or bar for retreating and guiding the guide portion in the rolling direction is provided on the flange portion 32 of the guide portion 3 and the end surface of the guide holder 2 to which the flange portion is bolted. Opening holes 23 and 34 into which the material 7 can be inserted are provided. Next, as shown in FIG. 6, when the guide portion 3 is moved in a direction away from the rolling roll, the retraction guide pipe or bar 7 is passed through the opening hole 34 provided in the flange portion 32, The guide holder 2 is inserted into the opening hole 23 provided on the end face, and is detached from the guide holder while sliding on the retraction guide pipe or bar.

  As shown in FIG. 2 and the like, the left and right end portions and the central portion of the upper surface of the guide portion 3 are positioned on both sides of the two hole-shaped portions 31 and along the direction of the pass line. Three concave grooves 35 communicating with the front and rear end faces of the portion are formed. As shown in FIG. 7 and the like, the groove 35 is provided with a weir 36 that crosses the groove in the vicinity of the end surface of the guide portion 3 on the side opposite to the rolling roll. With such concave grooves 35 and weirs 36, as shown by the arrow in FIG. 7, it is possible to prevent the cooling material that cools the rolling roll from being directly applied to the rolling material carried out from the rolling roll.

  FIG. 8 shows a side surface of the nozzle manifold 7 that supplies cooling water to the rolling rolls. The nozzle manifold 9 is provided along the outer periphery of the rolling roll and includes a nozzle 91 that radiates a cooling liquid toward the rotation center of the rolling roll. The coolant is supplied via a liquid supply pipe 92 that communicates with the nozzle manifold 9. Compared to the nozzle manifold 109 according to the prior art shown in FIG. 10, the guide box 102 is omitted, so that the thickness of the guide device 1 is reduced. Therefore, the position of the nozzle manifold can be brought closer to the pass line. it can. For this reason, it becomes possible to inject the cooling liquid from the nozzle 91 in the part nearer to the caliber of a rolling roll, and can raise the cooling effect of a rolling roll.

  Moreover, the cooling liquid sprayed to the rolling roll falls to the upper side surface of the guide part 3, and cools this upper side surface directly. Therefore, as in the prior art shown in FIG. 10, the guide section 103 can be cooled more effectively than the case where the guide section 103 is indirectly cooled with the guide box 102 interposed therebetween.

  Further, as described above, the left and right end portions and the central portion of the upper surface of the guide portion 3 are located on both sides of the two hole-shaped portions 31 and along the direction of the pass line, the front and rear end surfaces of the guide portion 3 Grooves 35 communicating with the groove are formed, and as shown in FIG. 7 and the like, these groove grooves include a weir crossing the groove groove in the vicinity of the end surface located on the side opposite to the rolling roll of the guide portion. 36 is provided. For this reason, as shown by the arrow in FIG. 7, the coolant that has dropped onto the upper side surface of the guide portion 3 flows in the concave groove 35 toward the rolling roll, but does not flow to the opposite side of the rolling roll due to the weir 36. Moreover, since the concave groove 35 is located on both sides of each of the two hole-shaped portions 31, it is difficult for the coolant to be directly applied to the rolled material carried into the guide device as indicated by the arrow in FIG. Therefore, it is possible to prevent the coolant from being directly applied to the rolled material carried out from the rolling roll.

  The weight and size can be reduced, the cooling effect between the rolling roll and the guide device can be increased, and the cooling liquid can be prevented from directly hitting the rolling material with a simple structure. is there.

DESCRIPTION OF SYMBOLS 1,101 Guide apparatus 2,102 Guide holder, guide box 21 Upper horizontal surface 22 Inner vertical surface 23 Open hole 3,103 Guide part 31 Hole type part 32 Flange part 33 Bolt 34 Open hole 35 Concave groove 36 Weir 4 Support member 5 Bolt 6 Bushing 7 Retraction guide pipe or bar 9, 109 Nozzle manifold

Claims (4)

A pair of guide holders facing each other along the axial direction of the rolling roll, and a guide portion that is divided into two parts in the vertical direction connected to the guide holder,
The guide holder is fixed to a support member provided near the entrance or exit of the rolling roll,
Each of the guide holders has an upper horizontal plane that forms an L shape with each other when viewed from the direction of the pass line, and an inner vertical plane that is orthogonal to the upper horizontal plane,
The guide part has one or more hole mold parts for guiding the rolled material,
The left and right outer surfaces of the guide part are provided with flange portions that protrude outward,
The left and right outer surfaces of the guide portion and the left and right end portions of the lower surface are in close contact with the upper horizontal surface and the inner vertical surface of the guide holder, respectively.
Each of the flange portions of the guide portion is bolted to an end surface of the guide holder located on the opposite side of the rolling roll. The tensile strength of the bolt that joins the flange portion of the guide part to the end face of the guide holder is set to the strength at which the bolt is damaged when a force in the rolling direction of a predetermined level or more is applied to the guide part. The guide device according to claim 1. On the flange portion of the guide portion and the end face of the guide holder to which the flange portion is bolted, an opening hole for inserting a retraction guide pipe or bar for retreating and guiding the guide portion in the rolling direction is provided. Yes,
When the guide portion is moved in a direction away from the rolling roll, the escape guide pipe or bar is opened on the end surface of the guide holder through the opening hole provided in the flange portion. The guide device according to claim 1 or 2, wherein the guide device is inserted into the hole and is separated from the guide holder while being slid on the retraction guide pipe or bar. On the upper side surface of the guide part, a concave groove is formed which is located on both sides of the hole-type part and communicates with the front and rear end faces of the guide part along the direction of the pass line.
The said groove is provided with the weir which crosses this groove near the end surface located in the opposite side to the said rolling roll of the said guide part, The Claim 1 thru | or 3 characterized by the above-mentioned. Guide device.

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