JP5008322B2 - Small diameter roll changing device and rolling equipment equipped with the same - Google Patents

Description

  The present invention relates to a small diameter roll changing device and a rolling facility provided with the small diameter roll changing device.

  In recent years, the required surface quality of non-ferrous and steel rolled materials for outer panels and electronic parts has been increasing. When rolling such a rolled material, a rolling mill having a small-sized work roll having a diameter of 100 mm or less is generally used. This is because rolling with less oil pits and excellent gloss can be performed. Also, rolling using a small-diameter work roll is effective for hard materials such as stainless steel because it is effective.

  As the above rolling mills, a so-called Sendimia rolling mill having 20 rolls and a so-called cluster rolling mill having 12 rolls have been developed and are publicly known. Patent Documents 1 to 8 below disclose a rolling mill having a small diameter work roll and a small diameter roll reassigning device for rearranging the work roll of the rolling mill having a small diameter work roll.

Japanese Patent Laid-Open No. 5-62002 Japanese Patent Laid-Open No. 62-234606 JP 49-105758 A JP-A-53-5058 JP-A-8-32336 JP-A-5-317932 Japanese Utility Model Publication No. 61-190304 Japanese Patent No. 3416251

  In the rolling mill disclosed in Patent Document 1, the work roll reassigning operation for directly rolling the rolled material in contact with the rolled material is performed as carefully as possible so as not to damage the roll surface. At this time, in order to prevent the surface of the work roll from being scratched, it is possible to protect it by installing a vinyl sheet or the like on the upper surface of the other party that comes into contact with the new work roll or wrapping a vinyl sheet or the like around the surface of the new roll. It is common. However, since this reassignment work was performed manually, it was a very difficult work. For this reason, it has been strongly desired to provide an apparatus for changing the rolls.

  Since such a rolling mill having a small-diameter work roll does not have a bearing box, it is not possible to use a small-diameter roll changing device as disclosed in Patent Document 2 using the rolling mill. For this reason, there is considered a small-diameter roll reassigning device that performs roll reassignment using a support mechanism that removably fixes one roll end, and the reassigning device having such a structure is disclosed in Patent Documents 3 to 5 is disclosed.

  The small-diameter roll changing device disclosed in Patent Document 3 to Patent Document 5 described above inserts a roll support member having a hole that fits into the end of the roll into one roll end, and cantilever the roll. This is a recombination method. In particular, in Patent Document 3 described above, in order to prevent the roll tilt caused by the gap between the fitting portions, the structure is supported by a hydraulic cylinder from the lower portion of the bearing box.

  Moreover, the small diameter roll changing device disclosed in Patent Document 6 shows a backup roll changing device used in a Sendzimir mill or the like, and this means that the outer periphery of one roll end is held by a chuck.

  These small-diameter roll changing devices disclosed in Patent Document 3 to Patent Document 6 have a structure that supports the roll end almost over the entire circumference. For this reason, at least a space enough to insert the roll support member is required at the end of the roll. However, when it is difficult to secure this space, it is possible to use the techniques disclosed in Patent Document 3 to Patent Document 6 described above. Can not. For this reason, the structure which supports a roll support member and a roll end surface with a volt | bolt is disclosed by the said patent document 7. FIG.

  In this case, the roll support member can have a diameter equal to or less than the diameter of the roll end face. However, bolting work is required, and the work roll cannot be easily attached and detached when the roll is changed. This arises from the need to securely fix the replacement roll to the roll support member. For this reason, a lot of time and labor are required for the roll reassignment work. Moreover, the structure which inserts the fork which is a roll support member under a recombination roll, and receives a roll by this is disclosed by the said patent document 8. FIG.

  In this case, the fork is inserted into the lower part of the recombination roll, and the work roll is received by this. For this reason, when exchanging an upper work roll and a lower work roll, the structure or method which leaves a space in the lower part of an upper work roll and the lower part of a lower work roll is used.

  Further, the roll support members disclosed in the above Patent Documents 3 to 8 are fixedly installed on the roll replacement cart. In the case where the roll is not contacted with another roll or a rolled material during roll reassignment, there is no big problem with such a structure.

  However, there is a problem when a roll in contact with another roll or a rolled material is rearranged. This is because, when attaching / detaching the recombination roll, the possibility of damaging the surface of the work roll increases due to the occurrence of relative slip between the contact roll and the other party. This is especially a problem when inserting new rolls. When the roll support member is fixed and installed on the rearrangement carriage, it is very difficult to solve this problem.

  In order to prevent the surface of the work roll from being damaged, it is only necessary to reduce the contact load with the partner that contacts the recombination roll as much as possible at the time of roll reassignment. That is, a mechanism for soft touching a contact partner is required. In order to solve this problem, a method of carrying out precise position control using a servo mechanism or the like for the vertical movement of the roll support member can be considered, but in this case, the recombination device becomes very expensive. In addition, very precise control is required and there is a problem in reliability.

  Accordingly, the present invention relates to a small-diameter roll changing device for a rolling mill having a small-diameter roll that has no bearing box and receives a thrust load at the end face of the roll, and provides a new roll support means for the changing roll at the time of roll changing. . Also, a new small-diameter roll changing device having effective supporting means between the roll supporting means and the roll changing cart is provided. Furthermore, by using this apparatus, it is possible to prevent the surface of the roll from being damaged when the roll is changed, and to provide rolling equipment that enables rolling with good surface quality.

A small-diameter roll changing device according to a first invention (corresponding to claim 1) that solves the above-mentioned problem is a set of the small-diameter rolls in a multi-stage rolling mill having a small-diameter roll that has no bearing box and receives a thrust load on the roll end surface. in changing apparatus, Rutotomoni provided cantilever support means for supporting and cantilevered said small diameter roll at a portion that is not hindered by the other members at the ends of the small-diameter rolls, and the rolled material of the end portion of the small diameter roll against A groove portion having a diameter smaller than the diameter of the end surface of the small-diameter roll is provided in a portion not to be provided in at least one end portion of the small-diameter roll, and the cantilever support means is sandwiched and supported between the roll end surface and the upper end surface of the groove portion. It was things, characterized in that.

A small-diameter roll changing device according to a second invention (corresponding to claim 2) that solves the above-described problems is a set of the small-diameter rolls in a multi-stage rolling mill having a small-diameter roll that has no bearing box and receives a thrust load at the roll end surface. In the replacement device, cantilever support means for cantilevering and supporting the small-diameter roll at a portion that is not obstructed by other members at the end of the small-diameter roll is provided, and a deep hole is provided on at least one end surface of the small-diameter roll On the other hand, the cantilever support means has a rod to be inserted into the deep hole, and the small diameter roll and the rod are provided in two upper and lower portions, and the diameters of the two rods correspond respectively. It is characterized in that it has a diameter smaller than that of the deep hole and one of the upper rods can move up and down.

A small-diameter roll changing device according to a third invention (corresponding to claim 3) that solves the above-mentioned problems is a set of the small-diameter rolls in a multi-stage rolling mill having a small-diameter roll that has no bearing box and receives a thrust load at the roll end surface. In the replacement device, cantilever support means for cantilevering and supporting the small-diameter roll at a portion that is not obstructed by other members at the end of the small-diameter roll is provided, and the cantilever support means is electromagnetically connected to the roll end. It is characterized by being supported by force .

The above fourth to solve the problem of the invention exchange the small-diameter roll set according to (corresponding to claim 4) device, a first aspect of the present invention, the small diameter roll changing device according to the second invention or the third invention, the An elastic support means for supporting the cantilever support means via an elastic body is provided on a roll change cart for changing the small diameter roll .

Fifth invention rolling equipment according to (corresponding to claim 5) to solve the above problems is the rolling mill having a small diameter roll for receiving the thrust load with the roll end surface without bearing boxes, the first invention to the rolling mill The small-diameter roll changing device according to any one of the fourth to fourth aspects is provided.

According to the small-diameter roll changing device according to the first to fourth inventions, the roll change of a rolling mill having a small-diameter roll having no bearing and receiving a thrust load at the roll end face is performed by a conventional manual operation. This can be done more easily than in the case.

According to the small diameter roll changing device according to the fourth aspect of the invention, since the elastic support means for supporting the cantilever support means via the elastic body is provided, the work roll, the lower first intermediate roll, the rolled material, etc. It is possible to ensure contact without damaging the member. In addition, the rearrangement work can be easily performed as compared with the case where the rearrangement is performed manually. Furthermore, since it is not necessary to protect the work roll, the lower first intermediate roll, the rolled material, etc. with a vinyl sheet or the like, the cost can be suppressed.

  In addition, since the elastic support means has a simple structure using an elastic body, it can be easily operated and the cost can be further reduced as compared with a structure controlled using an expensive and complicated control device. Furthermore, since the roll can be changed in a state where the rolled material is present in the rolling mill, the roll can be changed before the middle pass of rolling, particularly before the final pass. For this reason, since a new roll can be used for rolling of the final pass, a product with high gloss can be rolled.

According to the small-diameter roll changing device according to the first invention, the lower work roll is relocated to the lower side in order to support the end of the lower work roll at a position that is not obstructed by the lower first intermediate roll or the rolled material. There is no need to leave an interval for Thereby, the recombination procedure can be simplified, and the structure of the rolling mill itself can be simplified.

According to the small-diameter roll changing device according to the second invention, the upper work roll and the lower work roll are supported by the roll end surface, and therefore, when the upper work roll is pulled out or inserted, the cantilever support means is used for the upper work roll. There is no need to insert between the roll and the upper first intermediate roll. Thereby, even when the space | interval between an upper work roll and an upper 1st intermediate | middle roll cannot be opened much, a work roll can be rearranged.

According to the small diameter roll changing device according to the third invention, there is no need to process the end portion of the work roll. Thereby, since the work roll conventionally used can be used as it is, the labor of processing is not required and the cost can be suppressed.

According to the rolling equipment which concerns on 5th invention, the damage to the roll surface at the time of roll rearrangement can be suppressed to the limit. Thereby, high quality rolling with few surface scratches and good surface properties is possible. In particular, when rolling an outer plate and an electronic member, it is possible to provide extremely useful rolling equipment.

  An embodiment of the small diameter roll changing device and rolling equipment according to the present invention will be described with reference to FIGS. FIG. 1 is a side view of a small-diameter roll changing device according to the first embodiment, FIG. 2 is a schematic view of a rolling mill having a small-diameter roll according to the first embodiment, and FIG. 3 is a roll according to the first embodiment. FIG. 4 is a side view of an upper work roll and a lower work roll according to the first embodiment, and FIG. 5 is a lower work roll according to the first embodiment. FIG. 6 is a sectional view of the roll holder according to the first embodiment, FIG. 7 is a side view of the small-diameter roll changing device according to the second embodiment when the work roll is extracted, and FIG. FIG. 9 is a side view of the small-diameter roll changing device according to the third embodiment, and FIG. 10 is a plan view of the rolling equipment according to the fourth embodiment. .

  The first embodiment which is an embodiment according to the first to third inventions will be described below. FIG. 2 shows a schematic diagram of the 20-stage Sendier mill according to Example 1 when viewed from the front. The upper roll group 200 installed above the inside of the rolling mill has an upper work roll 201 that is in direct contact with the rolling material 230 on the lowermost side. Above the upper work roll 201, there are two upper first intermediate rolls 202. Above these upper first intermediate rolls 202 are two upper second intermediate rolls 203 and an upper idle roll 204.

  Above the upper second intermediate roll 203 and the upper idle roll 204, there are four upper reinforcing rolls 205. The upper first intermediate roll 202, the upper second intermediate roll 203, and the idle roll 204 are provided with a roll pulling device (not shown) supported by a spring on a mill housing (not shown). Further, the upper reinforcing roll 205 is used as an Azuyu roll.

  Here, the roll is divided into a plurality of rolls in the width direction, and these divided rolls are rolls attached so as to be able to rotate eccentrically on an axis fixed to a mill housing (not shown) , Split roll 205). The Azuyu roll controls the eccentric rotation angle of each divided roll 205 to control the shape in the width direction of the rolled material 230 during rolling, controls the amount of rolling, and the upper roll group 200 and the lower roll group 210 at the time of roll replacement. Used to open a gap between the two. In addition, the Azuyu roll may be applied to only the two inner rolls of the reinforcing roll 205 or may be applied to all the reinforcing rolls 205, but in this embodiment, it is applied only to the two inner rolls of the reinforcing roll. Such a structure is known and generally used well.

  The lower roll group 210 installed below the rolling mill includes a lower work roll 211 that is in direct contact with the rolling material 230 on the uppermost side. Below the lower work roll 211 are two lower first intermediate rolls 212. Below these lower first intermediate rolls 212 are two lower second intermediate rolls 213 and a lower idle roll 214. Below these lower second intermediate roll 213 and lower idle roll 214 are four lower reinforcing rolls 215. The upper reinforcing roll 205 was used as an Azuyu roll, but the lower reinforcing roll 215 was not used as an Azuyu roll.

  As the upper work roll 201 and the lower work roll 211 of such a rolling mill, a small roll having a roll diameter of about 40 to 100 mm is usually used. The rolled material 230 is sandwiched between the upper work roll 201 and the lower work roll 211, pressed and rolled. A roll holding member 231 is installed in the vicinity of the upper work roll inside the rolling mill. This roll holding member 231 is used for fixing and supporting the upper work roll 201 when the rolls are changed. In this way, the roll holding member has a structure in which the roll holding member can be taken in and out as indicated by arrow A depending on the situation such as during rolling and recombination by the cylinder 232.

  A plate guide 234 is installed in the vicinity of the lower work roll 211 inside the rolling mill. The term “through plate” as used herein means that the tip of the rolled material 230 passes through the rolling mill. The plate guide 234 is structured such that the tip position can be moved up and down by the cylinder 235 as shown by an arrow B, and is held so that no slack occurs in the rolled material when the lower work roll 211 is replaced. Use for etc.

  Next, the small diameter roll changing device according to the first embodiment will be described with reference to FIG. The roll holder 101 serving as a cantilever supporting means for supporting the work roll 116 is provided with an insertion portion 104 and a pressing device 105 (hereinafter referred to as a grip mechanism 105) at the tip. In this embodiment, a hydraulic cylinder is used for the grip mechanism 105.

  Further, in order to support the upper work roll 201 and the lower work roll 211 by the roll holder 101, as shown in FIG. ) Is provided on the outer side of the groove 400 with a diameter smaller than that of the roll end 401. The groove portion 400 and the insertion portion 104 are fitted.

  The roll holder 101 is coupled to the roll roll holder support member 117 by a nut 103 via a bolt 106 and a spring 102. In order to prevent the roll holder 101 from shifting vertically and laterally, a bar guide 112 is provided on the roll holder support member 117. With the roll holder support member 117, the spring 102, the nut 103, and the bar guide 112, for example, when the lower work roll 211 is mounted in the rolling mill, the tip insertion portion 104 of the roll holder 101 is pushed a little too much in the vertical direction. However, since the pushing displacement is absorbed by the contraction of the spring 102, a large pushing force is not generated. A mechanism constituted by the roll holder support member 117, the bolt 106, the spring 102, the nut 103, and the bar guide 112 is referred to as a soft touch mechanism 100.

  The spring constant of the spring 102 used in the soft touch mechanism 100 is desirably low. This is because the lower the spring constant, the smaller the spring force that is generated when the roll holder 101 is pushed. However, if the spring constant is extremely low, vibration is likely to occur during conveyance of the work roll 201 (or 211). For this reason, the spring force is appropriately set depending on the roll diameter and the trunk length of the work roll being used. In the first embodiment, as shown in FIG. 1, the spring force can be adjusted by the nut 103.

  The soft touch mechanism 100 is coupled to the worm 109 of the roll changing cart 108 via the worm nut 107. The worm 109 and the servomotor 111 are connected via bevel gears 110a and 110b. Thus, by controlling the rotation angle of the servo motor 111, the soft touch mechanism 100 can be smoothly moved up and down while being guided by the linear guide 113 or the like. In addition, a traveling rail 114 is installed below the roll replacement cart 108, so that the roll replacement cart 108 can move.

  Although the roll change cart 108 can be moved manually, it can also be moved using a servo motor or the like. Further, a counter balance 115 is provided on the worm nut 107 so as to balance the rotational moment generated by the work roll 201 (or 211), the roll holder 101 and the soft touch mechanism 100. Accordingly, the work roll 201 (or 211) is held, and when the work roll 201 (or 211) is lifted, the inclination of the work roll 201 (or 211) can be suppressed, and the work roll 201 (or 211) can be moved up and down smoothly.

  Hereinafter, a method for changing the upper work roll 201 and the lower work roll 211 in the rolling mill according to the first embodiment will be described with reference to FIG. At the time of roll replacement, first, the roll holding member 231 is extended toward the upper work roll 201 and brought into contact with the lower part of the upper work roll 201 so as to fix the position of the upper work roll 201.

  Next, the rotation angle of each Azuyu split roll 205 is controlled, and the upper first intermediate roll 202, the upper second intermediate roll 203, and the upper idle roll 204 are moved together with the Azuyu roll 205 by an arrow C by a roll pulling device (not shown). Move upward. As a result, the gap G between the upper work roll 201 and the upper first intermediate roll 202 is secured, and preparation for roll replacement is completed. At this time, the lower roll group 210 maintains the same positional relationship as during rolling.

  When the upper work roll 201 is extracted, a gap G is provided between the upper work roll 201 and the upper first intermediate roll 202 as shown in FIG. At this time, the upper work roll 201 is fixed by the roll holding member 231 so as not to move in the lateral direction, and the upper work roll 201 is placed in contact with the lower work roll 211. When the rolled material 203 exists in the rolling mill, the rolled material 203 is turned down and the upper work roll 201 is placed immediately above the lower work roll 211. Next, the roll change cart 108 (see FIG. 1) is advanced to insert the roll holder 101 between the upper work roll 201 and the upper first intermediate roll 202.

  When the insertion part 104 of the roll holder 101 reaches the groove part 400 provided in the upper work roll 201, the advancement of the roll replacement cart 108 is stopped, and the roll holder 101 is lowered and attached to the groove part 400. Next, the end surface of the roll is pressed by the grip mechanism 105 to reliably support the upper work roll 201. Then, the roll holder 101 is lifted, the roll changing cart 108 is moved backward, and the upper work roll 201 is taken out of the rolling mill.

  In the small-diameter roll changing device according to the first embodiment, it is necessary to be able to insert the tip holder 104 of the roll holder into the gap G that is opened between the upper work roll 201 and the upper first intermediate roll 202 at the time of changing. . However, depending on the type of rolling mill, there may be a case where the gap G between the upper work roll 201 and the upper first intermediate roll 202 cannot be made large.

  In this case, the thickness of the roll holder 101 cannot be sufficiently increased, and the deflection when the work roll 116 (see FIG. 1) is lifted may increase. Such a situation occurs particularly when the upper work roll 201 is reassigned. Since the lower work roll 211 can be reconfigured without the upper work roll 201, there is a margin. Further, both the upper work roll 201 and the lower work roll 211 are most problematic when the roll diameter is set to the maximum diameter within the usable range.

  These problems can be dealt with by devising the shape of the roll holder 101. FIG. 7 shows a cross section of the roll holder 101 according to the first embodiment. As shown in FIG. 7, the shape of the roll holder 101 is set to a curvature similar to that of the roll end 700, and the shape of the insertion portion 104 is set to a curvature similar to the curvature of the groove portion 400. As a result, the bending rigidity of the roll holder 101 is increased, and the deflection can be suppressed as much as possible even if the wall thickness is thin.

  When the lower work roll 211 is rearranged, there are many restrictions on the roll holder 101 (see FIG. 1) due to the arrangement of the lower roll group 210. The positional relationship between the lower work roll 211 and the lower first intermediate roll 212 is shown in FIG. As shown in FIG. 5, the lower work roll 211 is disposed so as to sink between the lower first intermediate rolls 212. For this reason, for example, it is very difficult to support the roll from the lateral direction as indicated by arrow D or the downward direction as indicated by arrow E due to the presence of the lower first intermediate roll 212.

  From this, a method of supporting the lower work roll 211 on the upper surface 502 of the roll end 401 can be considered. The upper surface 502 of the roll end 401 is the upper side of the upper surface of the lower first intermediate roll 212. In the rolling mill according to the present embodiment, it is supported at a position above the center of the lower work roll 211. As a result, the lower work roll 211 can be rearranged with the lower work roll 211 placed directly on the lower first intermediate roll 212.

  When the lower work roll 211 is extracted, the lower work roll 211 is rearranged while being placed on the lower first intermediate roll 212 in the same manner as in rolling. The roll change cart 108 is advanced to insert the roll holder 101 between the lower work roll 211 and the upper work roll 201.

  When the plug 104 at the tip of the roll holder 101 reaches the groove 400 provided on the lower work roll 211, the roll changing carriage 108 stops moving forward, and the roll holder 101 is lowered and attached to the groove 400. Next, the end surface of the roll is pressed by the grip mechanism 105 to reliably support the lower work roll 211. Then, the roll holder 101 is lifted, the roll changing cart 108 is moved backward, and the lower work roll 211 is taken out of the rolling mill.

  When the upper work roll 201 (see FIG. 2) is installed in the rolling mill, the soft touch mechanism 100 is used to ensure that the new roll comes into contact with the roll support member 231 and the rolled material 230. When the lower work roll 211 is installed in the rolling mill, the soft touch mechanism 100 is used to ensure that the new roll comes into contact with the lower first intermediate roll 212.

  It is empirically known that the work roll 116 can be damaged even at a small fall distance. In addition, when the pressing force when the roll comes into contact with the lower first intermediate roll 212 is large, there is a high risk of slippage between the rolls due to slight rotation of the lower first intermediate roll 212, pressing displacement, and the like. In order to avoid such a danger, it is necessary to make sure that the new roll installed is brought into contact with the roll support member 231, the rolled material 230, the first intermediate roll 212, and the like with as little force as possible. On the other hand, the adoption of the soft touch mechanism is effective as described above.

  The second embodiment which is an embodiment according to the fourth invention will be described below. FIG. 7 shows the shape and grip mechanism of the work roll used in the small-diameter roll changing device of the second embodiment. The upper work roll 201 and the lower work roll 211 are provided with deep holes 800 at their end faces. The depth of the deep hole 800 is set so as not to reach the plate path. When the hole has reached the portion of the plate path, a large rolling load acts on this portion, so that the flatness of the work roll may become larger than usual. This is because this may affect the shape of the rolled material.

  In the second embodiment, an upper rod 801 and a lower rod 802 are provided on the roll holder 101. The lower rod 802 is fixed and can be taken in and out by a cylinder 804. The upper rod 801 is attached so that it can move up and down. The upper rod 801 is positioned by a cam 805 attached to the servo motor 803, a pulley 806 attached to the upper rod 801, and a spring (not shown). It is possible to adjust.

  In the second embodiment, the upper work roll 201 and the lower work roll 211 are supported by inserting the upper rod 801 and the lower rod 802 into the deep hole 800. The outer diameters of the upper rod 801 and the lower rod 802 are several millimeters thinner than the inner diameter of the deep hole 800. This is to facilitate the insertion of the upper rod 801 and the lower rod 802 into the deep hole 800 when the roll is changed.

  Hereinafter, the method of extracting the old roll in Example 2 will be described. Here, it is assumed that no rolling material is present inside the rolling mill. First, the interval between the upper rod 801 and the lower rod 802 is adjusted to the center interval between the upper work roll 201 and the lower work roll 211, and inserted into the deep hole 800 on the roll end surface. Next, the servo motor 803 is driven to lower the upper rod 801 and sandwich the upper work roll 201 and the lower work roll 211.

  In this way, the upper work roll 201 and the lower work roll 211 are sandwiched between the upper rod 801 and the lower rod 802. For this reason, since the support of the upper work roll 201 and the lower work roll 211 is ensured, there is no risk that the upper work roll 201 and the lower work roll 211 will fall off even if the replacement cart 108 (see FIG. 1) is moved.

  Next, a method of inserting a new roll in this embodiment is shown in FIG. Here, the case where a rolling material exists in a rolling mill is assumed. The new roll is mounted between the upper work roll 201 and the lower work roll 211 with the upper rod 801 and the lower rod 802 with a plate material 900 (hereinafter referred to as a distant piece) thicker than the rolled material. In this state, the upper work roll 201 and the lower work roll 211 are inserted into the rolling mill, and the lower work roll 211 is installed on the lower first intermediate roll 212 (see FIG. 1) using the soft touch mechanism 100.

  In this state, the upper rod 801 is raised, the distant piece 900 is removed, and the lower rod 802 is pulled out using the cylinder 804, and the rear work roll 211 is completely replaced. Next, the upper work roll 201 is fixed by the roll holding member 231 (see FIG. 3). The upper rod 801 is extracted by moving the roll holder 101 (see FIG. 1) backward when the roll holder 101 is raised and the upper rod 801 is in a free position with respect to the deep hole 800.

  As described above, in the second embodiment, the roll end surface is used to support the upper work roll 201 and the lower work roll 211, so that it is not necessary to insert the roll holder 101 between the upper work roll 201 and the upper first intermediate roll 202. . Therefore, the gap G (see FIG. 3) between the upper work roll 201 and the upper first intermediate roll 202 at the time of reassignment may be small. Further, since the distant piece 900 is mounted outside the plate path of the upper work roll 201 and the lower work roll 211, even if the upper work roll 201 and the lower work roll 211 are damaged by the distant piece 900, the rolled material There is no impact on

  A feature of the reassigning device according to the present invention is that the diameter difference between the deep hole 800 and the upper rod 801 and the lower rod 802 is allowed and the roll is supported by the roll end surface. Therefore, the technique disclosed in Patent Document 7 that fixes the roll end face and the reassigning device is essentially different.

  The third embodiment which is an embodiment according to the fifth invention will be described below. FIG. 9 shows the shape of the roll holder and work roll used in the small-diameter roll changing device of the third embodiment. The electromagnet 600 is attached to the roll holder 101. The electromagnet 600 generates electromagnetic force and attracts and supports the upper surface of the roll end. For this reason, it is not necessary to process the edge part of the work roll 201 (or 211). The small diameter roll changing device and the roll changing method other than the shape of the roll holder and the work roll are the same as those in the first embodiment.

  Embodiment 4 which is an embodiment according to the sixth invention will be described below. FIG. 10 shows a rolling facility according to the fourth embodiment. Tension reels 11 are installed in the entrance direction and the exit direction of the rolling mill 10. The tension reel 11 is used for winding the rolled material 12. Further, a mill motor 14 is connected to the rolling mill 10 via a speed reducer 13.

  Moreover, the rail 15 is laid in the side surface direction of the rolling mill 10, and the small diameter roll changing device 16 described in any of the first to third embodiments is installed on the rail 15. Furthermore, the rail 17 is laid so as to intersect with the rail 15 for moving the small-diameter roll changing device 16, and the old work roll 201 (or 211) (see FIG. 1) extracted on the rail 17 is placed. Further, a roll carriage 19 for placing a new roll 18 is installed.

  Hereinafter, the roll changing method of the rolling apparatus according to the present embodiment will be described. First, the small-diameter roll changing device 16 moves to a position indicated by a dotted line 20. After the small-diameter roll changing device 16 has moved to the position indicated by the dotted line 20, the old roll 116 is extracted from the rolling mill 10 by the same method as the roll changing method described in any of the first to fifth embodiments.

  The small-diameter roll changing device 16 moves from the position indicated by the dotted line 20 to the position indicated by the solid line 16 on the rail 15 while supporting the old work roll 201 (or 211). After the movement of the small diameter roll changing device 16 to the position indicated by the solid line 16 is completed, the roll carriage 19 is moved to the front of the small diameter roll changing device 16 indicated by the dotted line 21. After the movement of the roll carriage 19 to the position indicated by the dotted line 21, the small-diameter roll changing device 16 loads the extracted old work roll 201 (or 211) on the roll carriage 19.

  The small diameter roll changing device 16 loads the extracted old work roll 201 (or 211) on the roll carriage 19 and then installs the new roll 18 loaded on the roll carriage 19 in the small diameter roll changing apparatus 16. After the new roll 18 is installed in the small-diameter roll changing device 16, the roll carriage 19 is moved to the position indicated by the solid line 19. After moving the small-diameter roll changing device 16 in which the new roll 18 is installed to the position indicated by the dotted line 20, in the same manner as the roll changing method described in any of the first to third embodiments, A new roll 18 is inserted and installed. These operations can be performed manually, but can also be performed automatically.

  The present invention is particularly effective for application to a rolling mill in which rolls need to be rearranged in a state where it is substantially in contact with other counterparts. For example, a 20-stage Sendemia mill, a 12-stage cluster rolling mill, etc. Can be applied to.

It is a side view of the small diameter roll rearrangement apparatus concerning Example 1. It is a schematic diagram when the rolling mill which has a small diameter roll which concerns on Example 1 is seen from the front. It is a schematic diagram when the rolling mill which has a small diameter roll at the time of roll change which concerns on Example 1 is seen from the front. It is a side view of the upper work roll and lower work roll which concern on Example 1. FIG. It is a front view of the lower work roll which concerns on Example 1, and a lower 1st intermediate | middle roll. 3 is a cross-sectional view of a roll holder according to Embodiment 1. FIG. It is a side view at the time of the work roll extraction of the small diameter roll changing apparatus which concerns on Example 2. FIG. It is a side view at the time of work roll insertion of the small diameter roll rearrangement apparatus concerning Example 3. It is a side view of the small diameter roll rearrangement apparatus concerning Example 3. It is a top view of the rolling equipment which concerns on Example 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Elastic support means 101 Cantilever support means 102 Elastic body 108 Roll recombination cart 201 Upper work roll 202 Upper first intermediate roll 211 Lower work roll 230 Rolled material 231 Roll holding member 234 Through plate guide 400 Groove part 600 Electromagnet 800 Deep hole 801 Upper rod 802 Lower rod 10 Rolling machine 16 Small diameter roll changing device

Claims (5)

In the reassembling device for the small diameter roll in the multi-stage rolling mill having a small diameter roll that receives a thrust load at the end face of the roll without a bearing box,
While providing a cantilever support means for cantilevering and supporting the small diameter roll at a portion that is not obstructed by other members at the end of the small diameter roll,
A groove portion having a diameter smaller than the diameter of the end surface of the small-diameter roll is provided in at least one end of the small-diameter roll in a portion that does not contact the rolled material at the end of the small-diameter roll,
The cantilever support means is configured to sandwich and support the roll end surface and the upper end surface of the groove.
A small-diameter roll changing device characterized by that. In the reassembling device for the small diameter roll in the multi-stage rolling mill having a small diameter roll that receives a thrust load at the end face of the roll without a bearing box,
Providing a cantilever support means for cantilevering and supporting the small diameter roll at a portion not disturbed by other members at the end of the small diameter roll;
While providing a deep hole in at least one end face of the small diameter roll,
The cantilever support means has a rod to be inserted into the deep hole, and
The small diameter roll and the rod are provided at the top and bottom two,
The diameters of the two rods are smaller than the corresponding deep holes of the small-diameter roll, and one of the upper rods can move up and down.
A small-diameter roll changing device characterized by that. In the reassembling device for the small diameter roll in the multi-stage rolling mill having a small diameter roll that receives a thrust load at the end face of the roll without a bearing box,
Providing a cantilever support means for cantilevering and supporting the small diameter roll at a portion not disturbed by other members at the end of the small diameter roll;
The cantilever support means is configured to support the roll end with electromagnetic force.
A small-diameter roll changing device characterized by that. In the small-diameter roll changing device according to claim 1, 2, or 3,
An elastic support means for supporting the cantilever support means via an elastic body on a roll change cart for changing the small diameter roll,
A small-diameter roll changing device characterized by that. In a rolling mill having a small diameter roll that receives a thrust load at the end face of the roll without a bearing box,
Equipped with the small-diameter roll changing device according to any one of claims 1 to 4 in the rolling mill,
A rolling facility characterized by that.

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