TW200422114A - Cross-rolling rolling machine and method of using same - Google Patents

Abstract

This invention provides a cross-rolling rolling machine that is of a simple construction, low installation cost and high reliability, while preventing position displacement within the gaps of the roll-chocks, and a rolling method by using the cross-rolling rolling machine. When rolling the material to be rolled, working roll-chocks 3, 4 are forced towards working rolls 1 by springs 21 while performing the rolling operation. Or, back-support roll-chocks 5, 6 are forced towards working rolls 2 by springs 25 while performing the rolling operation.

Description

200422114 (1) Description of the invention: [Technical field to which the invention belongs] The present invention relates to a cross roll mill and a rolling method using the cross roll mill. [Prior Art] A cross roll mill is characterized in that the material to be rolled is rolled in a state where the upper and lower working rolls are formed to cross. Figures 12 (a) and 12 (b) show the positional relationship between the upper and lower work rolls and the material being rolled. Fig. 12 (a) is a top view, and Fig. 12 (b) is a side view. As shown in Fig. 12 (a), the upper and lower work rolls 1 0 1 use the center in the width direction of the rolled material S as the intersection center (cross point) c, and S has been set at a specified intersection angle 0 (may Change) and cross state. Thereby, as shown in FIG. 12 (b), the opening degree a of the upper and lower working rolls 1 0 1 near the intersection point c and the opening degree b of the upper and lower working rolls 1 0 1 near the roll end generate a difference, and the upper and lower workings are performed. The opening degree of the rolls 101 is related to the distribution in the width direction of the material S to be rolled, and is a quadratic curve as shown in FIG. 13. If the cross angle β is increased, the inclination of the convexity under the quadratic curve becomes steeper. If the cross angle 0 is decreased, the inclination of the convexity under the quadratic curve becomes slower. When the crossing angle 0 is 0, the opening degree of the upper and lower work rolls becomes constant. Cross rolling mills appeared before the rolling mills. During their rolling, as shown in Figure 14 (a), the upper and lower working rolls 1 0 1 and the upper and lower back rollers 1 0 caused by the rolling load. In the bending of 2, the plate thickness distribution of the rolled material S tends to be thick at the wide central portion and thin at the wide end edges. However, in the cross-roller rolling mill, the opening angle of 5 312 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 for opening and lowering the work roll 1 〇1 is set by setting the aforementioned crossing angle 0 to an optimal value. The degree is formed into an optimal quadratic curve, which is used to compensate the bending amount of the upper and lower work rolls 〇01 and the upper and lower back rollers 102, so that as shown in FIG. 14 (b), the rolled material S can be made. The thickness distribution in the wide direction after rolling is nearly uniform, which can improve the thickness precision. Therefore, in recent years, whether it is hot rolling or cold rolling, a plurality of cross roll rolling mills have tended to be installed. Figure 15 shows an outline of the main configuration of a cross roll mill. Here, one of the motors configured to drive the upper and lower work rolls 101 is called the driving side, and the part on the opposite side where the operator performs work is called the operating side. The rotating shaft of the upper work roll 110 is supported to be rotatable by a pair of upper work roll bearing housings 103 on the drive side and the operation side. The rotating shaft of the lower work roll 1 0 1 is supported to be rotatable by a pair of lower work rolling light bearing blocks 1 0 4 on the driving side and the operating side. In addition, the rotating shaft of the upper back roller 102 arranged above the upper work roll 101 is supported to be rotatable by a pair of upper back roller bearing blocks 105 on the driving side and the operating side. The rotating shaft of the lower back roller 10 arranged below the lower work roll 1 0 1 is supported to be rotatable by a pair of lower back roller bearing holders 10 on the driving side and the operating side. This cross-roller rolling mill is different from the conventional rolling mill in that it has the upper and lower back-up roller bearing housings 105, 106, and up-and-down operations that are held in the conveying direction of the material to be rolled S and its opposite direction. The cross heads 1 0 7 and 1 8 arranged in the form of roll bearing seats 10 3 and 10 4 are driven by the cross head 1 in the conveying direction of the rolled material S shown by the large arrow in FIG. 15. 7, 1 0, 8 jointly drive the upper work roll 1 0 1 and the upper back support roller 10 2, the lower work roll 1 0 1 and the lower back support 1 10 2 to set the aforementioned cross angle 0. The upper work roll 1 0 1 and the upper back roller 6 shown in FIG. 15 are jointly driven. 312 / Invention Specification (Supplement) / 93_05 / 93107638 200422114 1 0 2. The lower work roll 1 0 1 and the lower back roller. The 10 2 method is called a pairwise cross method, and the method of driving only the upper and lower work rolls 1 0 1 is called the work roller single cross method. In addition, it is said that a cross head is arranged on either the driving side or the operation side, and the method in which the cross head is arranged to cross and the opposite side is pivoted is a single cross method (when the cross roller is provided on the drive side of the upper roll , Has a cross head on the operating side of the lower roll). The cross-roller rolling mill shown in FIG. 15 is equivalent to this, in which the upper work rolls 101 and the upper back-up rolls are held by being placed in the conveying direction of the material to be rolled S and its opposite direction. On the drive side of the 102, the upper work rolling bearing housing 103 and the upper back rolling bearing housing 105 are arranged with cross heads 10 and 7 in a direction from the conveying direction of the rolled material S and its reaction. It is held in the direction of the lower working roll 1 0 1 and the lower backing roller 1 0 2 and is arranged in the form of a lower working bearing housing 104 and a lower backing bearing housing 10 6. The cross head 1 0 is arranged. 8. In contrast, the crossheads may be arranged on the operation side of the upper work roll and the upper back roller, and on the drive side of the lower work roll and the lower back roller. In addition, it is said that the crossheads are arranged on both the drive side and the operation side so that the crossheads on the two sides intersect and the pivot is not provided as the double cross method. In the following, a case of a paired cross method and a single cross method will be described, but as its basic function, the work roll single cross method and double cross method are also the same. Therefore, the cross roll rolling machine referred to in the invention includes Wait. Figs. 16 (a) and 16 (b) are schematic diagrams showing the cross roll rolling machine of Fig. 15 viewed from the operation side. The cross-roller rolling mill adopts a pair-cross method and a single-cross method. In this cross-roller rolling machine, the conveying direction of the material to be rolled 7 312 / invention: * (Supplement) / 93-05 / 93107638 200422114 S and the opposite direction are held and arranged on the upper work roll 1 〇 1 and the upper back roller 10 102 are arranged on the drive side of the upper work roll bearing holder 103 and the upper back roller bearing holder 105 in the form of a pair of crossed heads (not shown). In addition, the lower work roll bearing housing 104 and the lower back rest arranged on the operating side of the lower work rolls 10 1 and the lower back support rolls 102 are carried in the conveying direction of the rolled material S and its opposite direction. A pair of crossed heads 108 is arranged in the form of a roller bearing seat 106. Here, each of the crosshead 108 series is supported so as to be able to move freely in the conveyance direction of the rolled material with respect to the rolling mill housing 100. Each cross head 108 is driven by a screw 1 15 screwed onto a nut 116 fixed to the rolling mill housing 100. As shown in Fig. 16 (b), the facing portion of the lower work roll bearing block 104 on each cross head 108 is bent in a horizontal direction (up and down direction in Fig. 16 (b)) with a certain curvature.面 Τ。 Face T. A curved surface T corresponding to this is formed at each of the lower cross head lining sleeves 1 1 3. The curved surface T abuts on the cross head 108 in a horizontal direction and can rotate freely. On the other hand, the lower cross head lining sleeve 113 is abutted on the bearing block lining sleeve 1 1 7 provided on the lower work roll bearing block 104 by its flat portion. In addition, in the opposing portion on the lower back roller bearing holder 106 side of each cross head 108, a curved surface similar to the solid curved surface T described above is formed in a horizontal direction with a constant curvature. Each of the lower cross head bushings 1 1 4 corresponding to the curved surface T formed thereon is abutted from a flat portion on a bearing block bush (not shown) provided on the lower back roller bearing block 1 0 6. At the same time, the curved surface T of the other side is in abutment with the cross head 108 in a horizontal direction and can rotate freely. Each of the crossheads 108 and the crosshead bushings 1 1 3, 1 1 4 are formed to have a structure capable of changing the cross angle 0 by sliding the sliding surfaces of the curved surface T with each other. It is held in place from the conveying direction of the rolled material S and its opposite direction. 8 3 丨 2 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 Placed on the upper work roll 1 0 1 and the upper back roller 1 0 The crossheads arranged in the form of the upper work roll bearing housing 103 on the drive side 2 and the upper back light bearing housing 105 also have the same structure as the crosshead 108, respectively. A curved surface T is formed at the opposing portions of the 103 and the upper back roller bearing holder 105, and at the same time, a crosshead sleeve (not shown) having a curved surface is provided on each of the curved surfaces T. On the other hand, a pair of upper work roll pivot blocks are provided on the rolling machine housing 100 so as to face the upper work roll bearing housing 103 arranged on the operation side of the upper work roll 101. 1 0 9. A curved surface T is formed with a constant curvature in a horizontal direction at the facing portion on the upper working roll bearing block 103 side of each upper working roll pivot block 1 0 9, and each of the curved faces T corresponding to this is formed. The work roll pivot block lining sleeve 1 1 0 is abutted on the flat work part of the bearing holder lining sleeve (not shown) provided on the upper work roll bearing seat 103, and at the same time, the other side is a curved surface T It is in horizontal contact with the upper work roll pivot block 1 0 9 and can rotate freely. In addition, a pair of upper back roller pivots are provided on the rolling machine housing 100 so as to face the upper back roller bearing housing 105 arranged on the operating side of the upper back roller 102. Block 1 1 1. A curved surface T is formed with a constant curvature in a horizontal direction at the facing portion on the upper back roller bearing block 105 side of each upper back light pivot block 1 1 1, and each curved surface T corresponding to this is formed. The upper back roller pivot block lining sleeve 1 1 2 is abutted on the upper back roller bearing housing 1 5 by its flat portion, and at the same time, the curved surface T on the other side and the upper back roller pivot block 11 1 It can be rotated freely in the horizontal direction. In addition, a lower work roll pivot block, a lower work roll pivot block bushing, a lower back support roll pivot block, and a lower back 9 are also provided on the driving side of the lower work rolls 101 and the lower back support rolls 102. 312 / Invention Specification (Supplement) / 93-05 / 9310763 8 200422114 Roller Pivot Block Bushing. However, in general, in the rolling of the material s to be rolled by the rolling mill, as disclosed in Patent Document 1, the work rolls 1 0 1 are biased toward the rolled side with respect to the backing rolls 1 2. Transport direction of material S. Here, this is called offset. In Fig. 16 (a), the offset amount of the work roll relative to the center of the rolling mill is C1, and the offset amount of the back-up roll is C2. The total of C1 and C 2 is generally called the offset. The displacement is performed so as to generate a horizontal component force (also referred to as an offset component force) in the direction of the arrow e in FIG. 16 (a) in the conveying direction of the rolled material S. The direction of the arrow e is consistent with the deviation of the work rolls. In addition, in the upper and lower back rollers 102, a horizontal component force is generated in an arrow f direction opposite to the conveyance direction of the material S to be rolled. The direction of the arrow f is the same as that of the back-up roller. Then, the upper and lower working roller bearing holders 10, 3, and 10 are pressed against the conveying direction of the rolled material S, and the upper and lower back roller bearing holders are pressed against the opposite directions. The work roll bearing housings 1 0 3, 1 0 4 are abutted against the rolling machine housing 1 0 0 on the exit side in the conveying direction of the rolled material S, and the upper and lower back roller bearing housings 1 5 5 and 1 6 are topped. The rolling machine housing 100 connected to the entrance side of the rolled material S in the conveying direction is stabilized. However, as shown in Fig. 16 (a) and Fig. 16 (b), it is because each of the rolling bearing housings 1 0 3, 1 0 4, 1 0 5, 10, 6 and the rolling machine housing 1 0 0 (To be exact, the bearing is located between the bearing sleeve bushing of the upper work roll bearing seat 103 and the work roll pivot block bushing 1 1 0, and the bearing provided at the lower work roll bearing seat 10 4 Between the seat bushing 1 1 7 and the cross head bushing 1 1 3, between the upper back roller bearing seat 105 and the upper back roller pivot block bush 1 1 2, and between the lower back bracket Between the roller bearing seat 1 0 6 and the lower cross head bushing 1 1 4), with a gap of 10 312 / Invention Specification (Supplement) / 93-05 / 9310763 8 200422114 d. Positioning of 1 0 3, 1 0 4, 1 0 5, 1 0 6 in the conveying direction of the rolled material S, when the rolling load is small, that is, the rolling force caused by the deviation is small, In the case of changing the crossing angle 0, etc., within the rolling mill housing 100, the upper and lower working roll bearing housings 10 and 10, or the upper and lower back roller bearing housings 105, 106 may be rolled. The material S is transported in the opposite direction or a position shift occurs, The left and right sides (the driving side and the opposite side of the operating side) are uneven, and the opening degree difference of the upper and lower work rolls 1 1 1 will be generated around the width direction of the material S to be rolled, so there is a material to be rolled. The problem of S meandering and bending, especially in severe cases, the problem of rupture and disconnection. In order to prevent such situations, a device for pushing a bearing housing (roller bearing housing) toward a conveying direction of a rolled material by a hydraulic cylinder is proposed as disclosed in Patent Documents 2 and 3, or as disclosed in Patent Document 4. It is revealed that a method of predicting the shrinkage of the rolling mill casing caused by the rolling load so as to minimize the interval between the rolling bearing housing and the rolling mill casing. Here, as shown in FIG. 17 (b), the rolling machine casing shrinkage means that the rolling load acting on the rolling machine casing in the vertical direction during the rolling process is centered in the vertical direction of the casing. The deformation of the material to be rolled in the conveyance direction caused by the portion, that is, the gap between the entrance side and the exit side of the casing shrinks. Patent Literature 1: Japanese Patent Laid-Open No. 8-1 9 7 1 1 0 Patent Literature 2: Japanese Patent Laid-open No. 9-2 8 5 8 0 6 Patent Literature 3: Japanese Patent Laid-Open No. 2 0 0 1- 1 1 3 3 0 Patent Document 4: Japanese Patent Laid-Open Publication No. 7-3 2 0 1 8 However, as in the above-mentioned Patent Document 2 and Patent Document 3, oil pressure steam 11 312 / Invention specification ( (Supplement) / 93-05 / 93 丨 07638 200422114 In the way that the cylinder bears the roller bearing seat toward the rolling machine housing, it is necessary to install a hydraulic cylinder in a very small place, so it becomes a special cylinder structure. The problem of high setup cost. This problem is particularly significant when retrofitting existing rolling mills. In addition, the piping for supplying hydraulic pressure to the hydraulic cylinder is necessary to pass through the rolling material without interfering with the space for the rolling mill housing and the roller bearing housing. In addition, a space for piping support is required. In addition, in combination with the special cylinder structure of the hydraulic cylinder mentioned above, problems of reliability such as oil leakage easily occur, and costs of repair or maintenance. In addition, in order to ensure the repair time, there is a problem that the operating rate of the equipment is reduced. Usually around the hot rolling mill, there is a large amount of cooling water for rolls, cooling water for rolling bearings, etc. It is preferable to arrange the lubricant supply port in the sliding portion between the bearing housing and the casing or between the bearing housing and the hydraulic cylinder in such a manner that the lubricant does not flow by using cooling water. However, in order to arrange the lubricant supply port in the sliding portion between the roll bearing seat and the hydraulic cylinder, the lubricant supply hole must be penetrated in the hydraulic cylinder. In addition, if the hydraulic cylinder abuts against the roller bearing seat, the sliding pressure increases, and the amount of wear of the bearing seat liner sleeve and the cylinder surface increases, so the cost for repairs also increases. In addition, as in the above-mentioned Patent Document 4, in a method of predicting the amount of shrinkage of the rolling machine casing caused by the rolling load to minimize the interval between the roll bearing housing and the rolling machine casing, the rolling load is small In the case where the amount of deformation of the casing is small, the gap between the roller bearing housing and the rolling machine casing remains, 12 3 丨 2 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 The space between the roller bearing support and the rolling mill housing is completely stabilized, but the housing is sandwiched by the housing, and the equipment is in trouble, etc. Based on this, the present invention is based on the above-mentioned supply of a simple structure, the installation cost Rolling in the gap of the rolling bearing housing using this cross roll rolling machine [Content of the invention] 1. Working rolling bearing housing and rolling roll rolling machine capable of supporting In the process of the material, the spring of the bearing seat was reported in the above work. 2. The cross-roller rolling feature of the present invention is further arranged in the direction in which the above-mentioned back-up roll is offset to force the above-mentioned 3. In the cross-rolling pro-rolling of the present invention, it is characterized in that the spring holds the fork and the cross The head liner sleeves are provided. 4. The back-up rollers and back-up bearing housings that use the cross rolls of the present invention to rotatably support the work rolls are characterized by the condition of the material being rolled. In addition, in the case where the rolling axis is set too narrow, the roller shaft may be completed with problems such as non-rotation and bearing burnout. The purpose is to improve the cost and reliability, and to prevent displacement. Cross roll rolling machine and making method. The machine is provided with a back support roller shaft which rotatably supports the work and supports the back support rollers. The feature is that the work rolling mill is arranged in a direction in which the roll of the rolled material is deflected to force the work rolling mill. The invention is described in 1. The spring of the backing roller bearing seat in the process of rolling the material. The machine is connected between the invention seat described in 1. and 2. and the bearing seat bushing, and delivers lubricant. The rolling method of the rolling mill is a rolling method using a working bearing housing and a rotatable cross-rolling rolling mill. When rolling, the above-mentioned work 13 312 / Invention Specification (Supplement) / 93-05 / 93 ΚΠ638 200422114 The roller bearing seat is biased toward the above-mentioned work rolls during rolling to be rolled. 5. The rolling method using the cross-roller rolling mill of the present invention, the invention described in the invention is characterized in that: the above backed-up roller bearing seat is pressed by the spring edge of the material to be rolled above the rolling material Offset direction while rolling. 6. The rolling method using the cross roll rolling machine of the present invention, and the invention described in 5., characterized in that: between the spring holder and the sleeve, and between the cross head and the cross head liner sleeve Supply [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 11 (b) is a schematic view showing the first embodiment of the cross-roller rolling mill of the present invention as viewed from the operating side, and the arrow A-A view in Fig. 1 (a). In the cross-roller rolling mill shown in FIG. 1 (a), first, the rotatable part which is held in the operation side of the roll 1 and the lower back roller 2 from the conveying direction of the material to be rolled and its opposite direction will be described. A pair of crossed heads 8 are arranged in the form of a lower work roll bearing seat 4 for the ground support roll 1 and a lower back roll bearing seat 6 that rotatably supports the lower support roll 6. Here, each of the crossing heads 8 is supported so as to be able to move freely in the conveying direction of the rolled material with respect to the rolling mill. Each of the crossheads 8 can be screwed onto a nut 16 fixed to the rolling mill housing 30. The phase diagram of the lower work roll bearing seat 4 on each crosshead 8 is shown in Fig. 1 (b), in the horizontal direction (the up-down direction in Fig. 1 (b)) 312 / Inventory Note) / 93-05 / 93107638 direction, the side is at 4. When rolling, the backing roller is at 4. bearing seat lining lubricant. (a), the pattern 'Figure 1 (a) 1 (b) is the lower roll of the figure, placed under the work of the rolling roller 2 of the casing 30 of the drive system f 1 5 forward part, such as a certain 14 200422114 The curvature forms a curved surface τ, and each of the lower crosshead bushings 13 corresponding to the curved surface τ is formed, and its flat portion abuts on the bearing seat bushing 1 provided on the lower work roll bearing seat 4 7. At the same time, the curved surface T on the other side is in abutment with the crosshead 8 in the horizontal direction and can rotate freely. In addition, in the facing portion on the lower back support bearing seat 6 side of each head 8, the same curved surface as the aforementioned T is formed in a horizontal direction with a certain curvature, and a curved surface T corresponding to this is formed. Each of the lower cross head bushings 14 is a flat portion abutted on a bearing bushing bush (not shown) provided on the lower back roller and the bearing seat 6. At the same time, the curved surface T on the other side and the cross The head 8 is abutted in the horizontal direction and can rotate freely. Each of the crossheads 8 and the crosshead bushings 1 3, 1 and 4 slide on each other by a curved sliding surface, and are formed in a structure capable of changing the cross angle. In the state shown in FIG. 1 (a), the lower work rolling light bearing block 4 is in the conveying direction of the material to be rolled by the cross head bushing 13 (the same direction as the component e in the horizontal direction) Positioning is performed in a deviated state. The lower back roller bearing seat 6 is in a direction opposite to the direction of conveyance of the rolled material by the cross head bushing 14 (the same direction as the component f in the horizontal direction). ) Positioning in a deviated state. In order to prevent the position shift of the lower work roll bearing seat 4, the crosshead bushing 13 on the inlet side of the rolled material conveying direction is provided to the rolling machine housing 30 (the conveying direction of the rolled material). Exit side) The bearing block limiting device 18 of the lower work roll bearing block 4 is forced. In other words, the crosshead bushing 13 on the entrance side of the rolled material in the conveying direction is provided with a bearing that is biased toward the lower and middle work rolls during the rolling of the material to be rolled, and forces the lower work roll bearing 4 to bear a bearing. Seat restricting device 1 8. The bearing block limiting device 18, as shown in FIG. 1 (b), is composed of a cross head lining 15 312 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 sleeve 1 3, thin-lined sleeve 2 0, The spring 21 and the spring holder 19 are configured. The spring retainer 19 is pressed against the bearing housing bushing 17 by the spring 21, whereby the lower work roll bearing housing 4 is urged toward the rolling machine housing 30. The spring 21 is preferably a disc spring. It can be applied as long as it is an elastomer or has equivalent functions, and is not limited to a disc spring. The crosshead bushing 1 3 and the spring retainer 19 are provided with through holes for supplying grease. The lubricant supplied between the crosshead and the crosshead bushing is supplied to the spring retainer 19 through the through holes. The sliding surface with the bearing housing bushing. On the other hand, with respect to the operation side shown in FIG. 1 (a), on the driving side (not shown), the lower work roll pivot block bush (not shown) on the entrance side of the rolled material conveying direction is provided. There is a bearing block restricting device (not shown) that presses the rolling bearing housing (not shown) in the direction of the rolling machine housing 30 (the outlet side of the rolled material and material in the conveying direction). This bearing block limiting device has the same configuration as the bearing block limiting device 18 on the operating side. Next, the upper work roll 1 will be described. The upper work roll 1 is provided on the rolling machine housing 30 so as to face the upper work roll bearing seat 3 rotatably supporting the upper work roll 1 disposed on the operation side of the upper work roll 1. There is a pair of upper work roll pivot blocks 9. In the facing portion on the upper work roll bearing block 3 side of each upper work roll pivot block 9, a curved surface T is formed with a constant curvature in the horizontal direction, and each upper work roll pivot block corresponding to this curved surface T is formed. The lining sleeve 10 is a flat portion abutting on a bearing seat lining sleeve (not shown) provided on the upper work roll bearing seat 3, and at the same time, the curved surface T on the other side and the upper work roll pivot block 9 It can be rotated freely in the horizontal direction. In addition, it faces the upper back roller bearing housing 5 of the upper back roller 2 in a rotatable support 16 312 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 In a manner, a pair of upper back roller pivot blocks 11 are provided on the rolling machine casing 30. A curved surface T is formed with a constant curvature in the horizontal direction at the facing portion of the upper back bracket bearing block 5 side of each upper back roller pivot block 11 and each upper back bracket corresponding to this curved surface T is formed. The roller pivot block lining sleeve 12 is abutted on the upper back roller bearing block 5 by its flat portion, and at the same time, the curved surface on the other side is abutted with the upper back roller pivot block 1 1 in a horizontal direction. Free to rotate. In the state shown in Fig. 1 (a), the upper work roll bearing housing 3 is positioned in a state where the conveying direction of the rolled material is deviated by the upper work roll pivot block bushing 10, The upper back roller bearing block 5 is positioned in a state where the upper back roller pivot block bush 12 is shifted in a direction opposite to the conveyance direction of the material to be rolled. In order to prevent positional displacement, the upper work roll pivot block bushing 10 on the inlet side of the rolled material conveyance direction is provided with a rolling machine housing 30 (the outlet side of the rolled material conveyance direction) The bearing block limiting device 18 of the upper work roll bearing block 3 is forced. In other words, the upper work roll pivot block bushing 10 at the entrance side of the rolled material in the conveying direction is provided with a direction deviating from the upper work roll 1 during the rolling of the rolled material, forcing the upper work roll. Bearing block limiting device 18 of the bearing block 3. The upper bearing block limiting device 18 has the same structure as the bearing block limiting device 18 of the lower work roll bearing block 4. The bearing block limiting device 18 is composed of an upper work roll pivot block bushing 10, a thin bushing (not shown), a spring (not shown), and a spring retainer (not shown). A spring retainer (not shown) is pressed against the bearing housing bushing by a spring (not shown), thereby urging the upper work roll bearing housing 3 toward the rolling machine housing 30. 17

312 / Invention Manual (Supplement) / 93-05 / 93107638 200422114 On the upper work roll pivot block bushing 1 0, spring retainer (not shown) There are through holes for grease supply, and it is supplied to the upper work roll The lubricant between the pivot block 9 and the upper work roll pivot block bushing sleeve 10 is supplied to the surface of the spring retainer through the through hole, in other words, it is supplied to the spring retainer and the slide of the bearing bushing sleeve. surface. On the other hand, in contrast to the operation side shown in FIG. 1 (a), the drive side (not shown) is held on the upper work roll 1 and the upper back roller 2 from the conveying direction of the rolled material and its opposite direction. The drive side of the upper work roll bearing support (not shown) that rotatably supports the upper work roll 1 and the upper back roller bearing support (not shown) that rotatably supports the upper back roller 2 , Configure a pair of cross heads (not shown). Then, the facing portion on the roll bearing seat side of each work head is formed with a curved surface T with a constant curvature in the horizontal direction, and the upper crosshead bushings corresponding to the curved surface T are formed by these. The flat part abuts on the bearing seat bushing sleeve provided on the upper work roll bearing seat. At the same time, the curved surface on the other side and the crosshead (not shown) are abutted in a horizontal direction and can rotate freely. In addition, on the crossheads, the opposing portions on the bearing seat side are also formed in the horizontal direction with curved surfaces T bent with a constant curvature, and upper crosshead bushings corresponding to the curved surfaces T are formed. , It is a flat part abutting on a bearing bushing sleeve (not shown) provided on the upper back roller bearing seat, meanwhile, the curved surface T on the other side crosses the upper back bracket (not shown) at Horizontal support is freely rotatable. In order to prevent the position shift of the upper work roll bearing seat, the upper work roll crosshead bushing is provided at the entrance side of the rolled material in the conveying direction, and is provided to the rolling machine housing 30 (the conveying direction of the rolled material). Exit side) Forced on work roll 18 312 / Invention note! : (Supplement) / 93-05 / 93107638 200422114 Xingkun bearing block bearing block limiting device (not shown). In other words, the upper work roll crosshead lining sleeve on the entrance side of the rolled material in the conveying direction is provided with a bearing that is deviated from the upper work roll 1 during the rolling of the rolled material, forcing the upper work roll bearing to bear. Seat limiting device. This bearing block limiting device has the same structure as the bearing block limiting device 18 on the operation side. According to the first embodiment of the cross roll rolling machine described above, the upper and lower working roll bearing seats 3 and 4 on both the operation side and the driving side are shifted to the roll offset direction by the simple mechanism of the spring 21 (the upper and lower working rolls are shifted). The bearing holders 3 and 4 are forced in the direction of conveying the rolled material), so as to prevent the upper and lower working roller bearing seats 3 and 4 from working with the upper working roller pivot block bushing 10 and the cross head bushing 13 Position shift can prevent the rolling, bending, cracking and other failures of the rolled material. Next, a second embodiment of the cross roll mill according to the present invention will be described with reference to Figs. 2 (a) and 2 (b). Fig. 2 (a) shows a second embodiment of the cross-roller rolling mill according to the present invention, and Fig. 2 (a) is a schematic view of the cross-roller rolling mill viewed from the operation side, and Fig. 2 (b) is Fig. 2 ( a) B-B arrow view. The cross-roller rolling mill shown in Fig. 2 (a) is in a direction where the upper and lower back supporting rollers 2 are further shifted in the direction of rolling of the rolled material, forcing the bearings of the upper and lower back supporting bearing seats 5, 6 The seat restraint 22 is different from the cross-roller rolling mill shown in FIG. 1 (a). This will be specifically described below. In the cross-rolling pro-rolling machine shown in FIG. 2 (a), the lower pro-rolling is first described; it is held in the lower work roll 1 and the lower back roller 2 by being carried in the conveying direction of the material to be rolled and its opposite direction. The lower working roll bearing seat 4 rotatably supporting the lower working roll 1 on the operating side and the lower back roller 2 19 312 / invention description are rotatably supported! : (Supplement) / 93-05 / 93107638 200422114 The lower back roller bearing block 6 is equipped with a pair of crossheads 8. Here, each cross head 8 is supported so that it can move freely with respect to the rolling machine housing 30 in the conveyance direction of a rolling material. The driving of each crosshead 8 is performed by a screw 15 screwed to a nut 16 fixed to the rolling mill housing 30. In the facing portion on the lower work roll bearing block 4 side of each crosshead 8, a curved surface T is formed with a constant curvature in the horizontal direction, and each lower crosshead bushing 13 corresponding to the curved surface T is formed. The flat portion thereof is in abutment with the bearing block bushing 17 provided on the lower work roll bearing block 4. At the same time, the curved surface T on the other side and the crosshead 8 are in abutment with each other in the horizontal direction and can rotate freely. In addition, at the facing portion on the lower back support light bearing block 6 side of each crosshead 8, a curved surface T having a constant curvature is formed in the horizontal direction, and each lower crosshead bushing 1 corresponding to the curved surface T is formed. 3, the flat part is abutted on the lower back support light bearing seat 6, meanwhile, the curved surface T on the other side and the crosshead 8 are abutted in a horizontal direction and can rotate freely. Each of the cross heads 8 and the cross head bushings 1 3, 1 and 4 slide on each other by a curved surface-like sliding surface to form a structure capable of changing the cross angle. In the state shown in FIG. 2 (a), the lower work roll bearing block 4 is deviated in the conveying direction of the material to be rolled (same as the direction in which the horizontal component force e is generated) by the cross head bushing 13. Positioning is performed in a state where the lower back roller bearing seat 6 is biased in the direction opposite to the conveying direction of the rolled material (the same direction as the horizontal component force f) by the cross head liner sleeve 14 Positioning is performed in the bit state. In order to prevent the position shift of the lower work roll bearing seat 4, the crosshead bushing 13 on the entrance side of the rolled material conveying direction is provided to the rolling machine housing 30 (the conveying direction of the rolled material). Exit side) Force 20 312 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 Press the bearing block limiting device 18 of the work roll bearing block 4. In other words, the crosshead bushing 13 on the inlet side of the rolled material in the conveying direction is provided with a bearing that presses the lower work roll bearing seat 4 in a direction in which the lower work roll 1 deviates during the rolling of the rolled material. Seat restricting device 1 8. The bearing block restricting device 18 has the same structure as that shown in FIG. 1 (b), and is composed of a cross head bushing 1 3, a thin bushing 20, a spring 21, and a spring retainer 19. . The spring holder 19 is pressed against the bearing holder bushing 17 by the spring 21, and thereby, the lower work roll bearing holder 4 is urged toward the rolling machine housing 30. The crosshead bushing 1 3 and the spring retainer 19 are provided with through holes for supplying grease. The lubricant supplied between the crosshead and the crosshead bushing is supplied to the spring retainer 19 through the through holes. The surface is, in other words, the sliding surface of the spring retainer and the bearing housing bushing 17. In addition, in order to prevent the positional shift of the lower back roller bearing block 6, the crosshead bushing 14 on the exit side of the rolled material conveying direction is provided with a housing 30 for the rolling mill (material to be rolled). (Carrying direction entrance side) to press the bearing block limiting device 22 of the lower back roller bearing block 6. In other words, the crosshead bushings 14 on the exit side of the rolled material in the conveyance direction are provided with a force for lower back roller bearing 6 to bias the lower back roller bearing 6 in a direction in which the lower back roller 2 is shifted during rolling of the rolled material. Bearing block restraint 2 2. As shown in Fig. 2 (b), the bearing block limiting device 2 2 is composed of a cross-head bushing 14, a thin bushing 24, a spring 2 5, and a spring retainer 2 3. The spring retainer 2 3 is pressed against the bearing housing bushing sleeve 26 by the spring 25, thereby urging the lower back roller bearing housing 6 in the direction of the rolling machine housing 30. The crosshead bushing 1 4 and the spring retainer 2 3 are provided with through holes 21 312 / Instruction Manual (Supplement) / 93-05 / 93107638 200422114 for grease supply, and are supplied between the crosshead and crosshead bushing. The lubricant is supplied to the surface of the spring holder 23 through the through hole, in other words, to the sliding surface of the spring holder and the bearing housing bushing 26. On the other hand, with respect to the operation side shown in FIG. 2 (a), the driving roller (not shown) on the driving side (not shown) and the lower work roll pivot block bush (not shown) on the exit side in the conveying direction of the rolled material, The directional rolling mill housing 30 (the conveyance direction exit side of the material to be rolled) presses the bearing block restricting device (not shown) of the lower work roll bearing block (not shown). This bearing block limiting device has the same structure as the bearing block limiting device 18 on the operation side. In addition, a lower back roller pivot block bush (not shown) on the exit side in the conveyance direction of the rolled material is provided to the rolling machine housing 30 (the entrance side in the conveyance direction of the rolled material). The lower seat support bearing seat (not shown) is forced to a bearing seat limiting device (not shown). This bearing block limiting device has the same structure as the bearing block limiting device 22 on the operating side. Next, the upper work roll 1 will be described; a pair of upper work roll pivot blocks 9 are provided on the rolling machine casing 30 so as to face the upper work roll bearing support 3 rotatably supporting the upper work roll 1. . At the facing portion on the upper work rolling light bearing seat 3 side of each upper work roll pivot block 9, a curved surface T is formed with a constant curvature in the horizontal direction, and each upper work roll pivot corresponding to this curved surface T is formed. The block lining sleeve is abutted against a bearing seat lining sleeve (not shown) provided on the upper work roll bearing seat 3 by its flat portion, and at the same time, the curved surface T on the other side and the upper work rolling pin block 9 It can be rotated freely in the horizontal direction. In addition, on the rolling machine housing 30, it faces the upper back roller bearing support 22 312 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 5 which rotatably supports the upper back roller 2. A pair of upper back roller pivot blocks 1 1 are provided. A curved surface T is formed with a certain curvature in the horizontal direction at the facing surface of the upper back bearing bearing housing 5 of each upper back roller and pivot block 11 and each upper back roller pivot having the curved surface T is formed. The shaft block lining sleeve 12 is abutted on the upper back roller bearing seat 5 by its flat portion. At the same time, the curved surface T on the other side and the upper back support pivot block 1 1 are supported in a horizontal direction for free rotation. .

In the state shown in FIG. 2 (a), the upper work roll bearing seat 3 is positioned in a state where the conveying direction of the rolled material is deviated by the upper work roll pivot block liner sleeve 10, and the upper back The bearing block 5 is positioned in a state where the bearing block 5 is shifted in a direction opposite to the conveyance direction of the rolled material by the upper backing of the pivot block bush 12. In order to prevent the position shift of the upper work roll bearing seat 3, the upper work roll pivot block bushing 10 at the entrance side of the rolled material conveying direction is provided with a roll housing 3 0 (rolled The conveying direction of the manufactured material is on the exit side) and the bearing block limiting device 18 of the upper working rolling bearing block 3 is forced. In other words, the upper work roll pivot block lining sleeve 10 at the entrance side of the rolled material in the conveying direction is provided with an upper work roll bearing seat for urging the upper work roll 1 in the direction in which the work roll is being rolled. 3 of the bearing block limiting device 18. This bearing block restricting device 18 has the same structure as the bearing block restricting device 18 of the work roll bearing block 4 under pressure. The bearing block limiting device 18 is composed of an upper work roll pivot block bushing 10, a thin bushing (not shown), a spring, and a spring retainer. A spring retainer (not shown) is pressed against the bearing housing bushing by a spring (not shown), and thereby a structure for forcing the upper work roll bearing housing 3 in the direction of the rolling machine housing 30 is formed. The upper work roll pivot block bushing 1 〇, spring retainer (not shown) 200422114 A through hole for grease supply is provided to supply the upper work roll pivot block 9 and the upper work roll pivot block bush 1 The lubricant between 0 and 0 is supplied to the surface of the spring holder through the through hole, in other words, to the sliding surface of the spring holder and the bearing housing bushing.

In addition, in order to prevent the position of the upper back roller bearing block 5 from being shifted, the upper back roller pivot block bushing 12 on the exit side of the rolled material conveyance direction is provided with a housing 30 for the rolling mill. (The entrance side in the conveyance direction of the rolled material) The bearing block restricting device 22 of the upper back roller bearing block 5 is forced. In other words, the upper back roller pivot block lining sleeve 12 on the exit side of the rolled material in the conveying direction is provided with an upper back bracket for forcing the upper back roller 2 to be displaced in the direction in which the rolled material is being rolled. Bearing block limiting device 2 of the roller bearing block 5. The bearing block limiting device 2 2 has the same configuration as that shown in FIG. 2 (b). On the other hand, compared with the operation side shown in Fig. 2 (a), the driving side (not shown) is rotatable by holding it from the conveying direction of the rolled material and its opposite direction.

An upper work roll bearing seat (not shown) for ground support of the upper work roll 1 and an upper back roll bearing seat (not shown) for rotatably supporting the upper back roll 2 are provided with a pair of crossed heads (not shown) Show). Then, the facing portion on the roll bearing seat side of each work head is formed with a curved surface T with a constant curvature in the horizontal direction, and the upper crosshead bushings corresponding to the curved surface T are formed by them. The flat part abuts on the bearing seat bushing sleeve provided on the upper work roll bearing seat, and at the same time, the curved surface on the other side and the crosshead (not shown) are supported in a horizontal direction for free rotation. In addition, the facing portion on the back roller bearing seat side of each crosshead is also formed in the horizontal direction with a curved surface T bent with a constant curvature, and a crosshead bushing corresponding to the curved surface T is formed. 200422114 The flat part is abutted on the upper back bracket bearing seat. At the same time, the curved surface on the other side and the cross head bushing (not shown) are supported in a horizontal direction for free rotation.

In order to prevent the position shift of the bearing housing of the upper work, the crosshead bushing at the entrance side of the rolled material conveying direction is provided with a rolling machine casing 3 0 (the conveying direction of the rolled material outlet side ) Forcing the bearing block limiting device (not shown) of the upper work roll bearing block. In other words, the crosshead bushing at the entrance side in the transport direction of the rolled material is provided with a bearing seat restraining device for urging the upper work roll 1 in a direction in which the upper work roll 1 is shifted during the rolling of the rolled material. This bearing block limiting device has the same configuration as the bearing block limiting device 18 on the operation side. In addition, in order to prevent the position of the upper back roller bearing seat from being shifted, the crosshead bushing at the exit side of the rolled material conveying direction is provided to the rolling machine casing 30 (the conveying direction of the rolled material). (Inlet side) The bearing block restricting device (not shown) of the upper back roller bearing block is forced. This bearing block limiting device has the same structure as the bearing block limiting device 22 on the operation side. According to the second embodiment of the cross-roller rolling machine described above, the simple mechanism of the springs 21, 25, in addition to the upper and lower working roll bearing seats 3, 4, further supports the upper and lower back light bearing seats 5, 6 Forcing the rolls in an offset direction (for example, moving the work roll bearing housings 3 and 4 to the conveying direction of the material to be rolled and the backing roll bearing housings 5 and 6 in the opposite direction) to prevent the roll bearing housings 3 and 4 The position deviation in the gaps of 5, 5, and 6 can prevent the troubles such as meandering, bending, cracking and breaking of the rolled material. In addition, since the lubricant is directly supplied to the sliding portion of the spring holder and the bearing housing bushing, the lubricant 200422114 does not flow due to cooling water such as milk cooling water and bearing housing cooling water, and can maintain a good lubrication state. And can reduce the cost required for repair and maintenance of spring retainers and bushings. In the following, the reason why the spring 25 is not only used to press the upper and lower working roll bearing housings 3 and 4 but also the upper and lower back roller bearing housings 5 and 6 to the rolling machine housing 30 is explained in detail as a reason.

The upper and lower working roller bearing seats 3, 4 or the upper and lower back roller bearing seats 5, 6 are shown in FIG. 4 and have upper and lower working roller pivot block bushings 10, cross head bushings 1 and 3. In the gap d between the back support roller pivot block sleeve 1 2 and the cross head sleeve sleeve 1 4, a position shift occurs in the conveying direction of the rolled material or the opposite direction, which causes the upper work roll 1 and The parallelism between the upper back roll 2 or the lower work roll 1 and the lower back roll 2 is broken, and the upper work roll 1 and the upper back roll 2 or the lower work roll 1 and the lower back roll 2 are slightly intersected. The intersection angle of the upper work roll 1 and the upper back roller 2 is referred to as a roll intersection angle. Alternatively, the intersection angle of the lower work roll 1 and the lower back roller 2 is referred to as a roll intersection angle. If such a roll crossing angle occurs, a force (thrust force) deviating in the axial direction is generated between the upper and lower work rolls 1 and the upper and lower back rollers 2. Figure 3 shows the relationship between the roll crossing angle and the thrust coefficient (divided by the thrust divided by the rolling load value). In a paired cross rolling mill, the work rolls 1 and the back-up rolls 2 normally have a parallel positional relationship between their respective central axes. However, referring to FIG. 3, it can be seen that the micro rolls are accompanied by the destruction of parallelism. The change of the crossing angle greatly changes the thrust coefficient. Therefore, if the roll crossing angle is slightly increased, there may be a case where a great thrust force is generated. As shown in FIG. 4, the rolling mill is provided between each of the roller bearing seats 3, 4, 5, 6, and 200422114 pivot block bushings or cross head bushings 10, 1, 3, 1, 2, and 14. The gap d and the roll crossing angle are variable. The variation of the roll crossing angle depending on the gap d is usually uncontrollable. For example, in the example of the rolling mill shown in Fig. 1 (a), Fig. 1 (b), and Figs. 14 (a) and 14 (b) of the conventional example, a maximum of 0 is produced during rolling. 0 4 degree roll crossing angle. Fig. 5 shows the relationship between the rolling angle and the differential load and thrust when the lower work roll 1 and the lower back roller 2 cross. Here, the "difference load" refers to the difference obtained by subtracting the load on the driving side from the load on the working side. As shown in FIG. 5, a thrust of 1200 kN is also generated at a roll crossing angle of 0.04 degrees. This thrust is shown in Fig. 6, and the differential load on the operation side and the drive side for balancing the torque to rotate each of the rolls 1, 2 in the front view of the rolling mill is increased. As shown in FIG. 5, when the thrust is 1 2 0 0 k N, the difference load changes to 6 0 0 k N. When the differential load change is 600 kN, and if the vertical spring coefficient of the rolling mill casing is 15 00 kN / mm, the vertical direction (rolling load The difference in extension of the action direction produces about 4 0 // m (= 600 / 15000x 1000). Therefore, it is assumed that, as shown in FIG. 6, as the case where the material S to be rolled is being rolled, even if the material to be rolled S passes through the center in the width direction of the upper work roll 1, because of the compensation of the differential load, it is necessary to drive the The shrinkage of the opening degree of the upper and lower work rolls 1 on the side is equivalent to this amount. Generally, when rolling a material to be rolled, the operator adjusts it to a level that should be zero after checking the change in the differential load at the beginning of rolling of the next material to be rolled after rolling a material to be rolled. (The difference between the opening degree of the operating side and the driving side of the upper and lower working rolls). However, in the knowledge such as the cross-rolling 312 / Invention Specification (Supplement) / 93-05 / 93107638, the roll operation is to flatten the square, and the next 40 is reworked 27 200422114

The position shift of the machine-like work roll bearing seats 3, 4 or the back roller bearing seats 5, 6 in the conveying direction of the rolled material occurs due to the above reasons, and is caused by the thrust force accompanying the rolling cross angle generated by this In a state where a differential load is generated, only the amount of the differential load depending on the thrust force changes the level value to be obtained. In addition, in the aforementioned gap d, the positions of the work roll bearing seats 3, 4 or the back-up roller bearing seats 5, 6 are not fixed and can be changed. In this way, if the position of the work rolling bearing housings 3 and 4 or the back bracket pro bearing housings 5 and 6 changes within the gap d, the rolled material with the same cross angle β and the same size is rolled under the same conditions. In the case of thrust, thrust, differential load and the grade value that should be obtained all lose reproducibility. Therefore, even if rolling is continued in this state, bending or meandering occurs in the material to be rolled, and in particular, when it is intermittently rolled such as hot rolling, or worse, it becomes the tail end of the material to be rolled. Reason for pulling in.

Therefore, a better method is to use the springs 2 5 not only to press the upper and lower working roller bearing seats 3, 4 but also to press the upper and lower back roller bearing seats 5 and 6 toward the rolling machine housing 30 to prevent each roller bearing seat. The positions of 3, 4, 5, and 6 within the gap d are shifted. It can minimize the occurrence of the cross angle (roller cross angle) of the upper and lower work rolls 1 and the upper and lower back rollers 2 and can suppress the generation of the thrust force accompanying it, and can more effectively prevent the material from rolling, bending and cracking. Disconnection, etc. Next, a description will be given of a situation when the work rolls 1 and the back-up rolls 2 are put into the rolling mill or pulled out with reference to Figs. 1 (a) and 2 (a). The work roll 1 and the back support roll 2 are assembled or pulled out in a direction perpendicular to the paper surface of Fig. 1 (a) and Fig. 2 (a). When the work roll 1 and the back roller 2 are assembled or pulled out, in order to prevent mechanical interference, the crosshead 8 is rotated by the side of the screw 15 of the screw 2216 and the screw 15 of the nut 16 in the mutual screwing. Open 2 ~ 5 in m away from the roller bearing holders 4 and 6. Next, after the work roll 1 and the back support roll 2 are assembled, the cross head 8 is closed, and the gap between the spring retainer 19 and the bearing bushing sleeve 17 and the spring retainer 2 3 and the bearing bushing sleeve 2 6 Is set to zero. The gap between the spring retainer 19 and the thin-lined sleeve 20, the spring retainer 23 and the thin-lined sleeve 24, when the rolling load is applied, consider the rolling machine casing 3 0 as shown in Figure 1 7 ( b) The case of shrinking in the narrowing direction of the gap as shown in the figure is set to 1.0 mm to 2.0 mm. When a rolling load is applied, in accordance with the shrinkage of the rolling machine casing 30, the gap becomes smaller, and the springs 2 and 25 are compressed between the rolling bearing seats 4 and 6. As the force acting on the springs 21 and 25 in this compressed state, it is preferable that one bearing block is 2000 to 300 kN. If it is lower than 2000 kN, the force for pressing the roll bearing housings 4 and 6 in the direction of the rolling machine casing 30 is insufficient. When it exceeds 300 kN, excessive force is applied to the rolling mill. Rotation of a bearing (not shown) in the pro-bearing housings 4 and 6 may damage it. In order to give full play to the function of the bearing block limiting device 18 of the present invention, lubrication is very important. The lubricating part is connected between the spring retainer 19 and the bearing housing bushing 17 and between the crosshead 8 and the crosshead bushing 13. In particular, it is important that the crosshead 8 and the crosshead bushing 13 are supplied with lubricant to the surfaces where the curved surface-shaped sliding surfaces slide on each other. Moreover, in any of the first and second embodiments, it is shown that only one of the operation side and the driving side is moved from the one-side roll bearing housing to the entrance side and the exit side of the material to be rolled in the conveying direction. Single cross rolling mill, but the pivot block 9, 1 1 etc. which becomes the center of rotation when the crossing angle is changed 29 312 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 Fixed to the rolling machine casing 3 The above gap cannot be opened when the work rolls 1 and the back-up rolls 2 are assembled and pulled out like the cross head 8. As a result, the gaps between the spring holders on the pivot block 9, 1 side and the bearing housing bushings on the roll bearing seats 3, 5 can be prevented from interfering with the inside of the rolling machine for the work roll 1 and the back-up roll 2. The interference of each of the roll bearing housings 3 and 5 during assembly and extraction is performed, so that only a slight gap is required in a state where no rolling load is applied. The gap is preferably 0.2 to 1.0 mm. If it is less than 0.2 mm, there is a risk of interference when the work roll 1 and the back roller 2 are assembled into and withdrawn from the rolling mill. If it exceeds 1.0 mm, the rolling load is applied, even if the rolling The machine casing 30 is contracted, and the spring retainer still cannot reach the bearing seat bushings of the roll bearing seats 3 and 5, which may not be able to exert its forcing force. In either of the first embodiment and the second embodiment, the gap is set to 0.4 mm. (Example) Figs. 1 (a) and 1 of the present invention are applied to the first to seventh stations (F1 to F7) of the finishing rolling mill 4 6 of the hot rolling production line 40 shown in Fig. 7 (b) As shown in Figure 16 (a) and Figure 16 (b), the rolling condition of the paired cross rolling mill (only the bearing seat restriction device for pressing the work roll bearing seat) is rolled. A case where the cross rolling mill is rolled is shown, and the position shift amount of the work roll bearing housing is compared and evaluated. In the hot rolling production line 40 shown in FIG. 7, the component symbol 41 is a heating furnace, 42 is a sizing press, 43 is a rough rolling machine, and 44 is an end shear. , 45 is a descaling device, 47 is a cooling zone, and 48 is a winding device. Fig. 8 shows the rolling load of the fourth F 4 and the operation of becoming the cross head side 30 312 / Invention specification (Supplement) / 93-05 / 93107638 200422114 Position shift amount of the lower work roll bearing seat (conveying direction) Entrance side). In addition, the diameter of the working roll of the fourth stand of this embodiment is about 630 mm, the diameter of the back-up roll is about 1550 mm, the crossing angle is 0.02 to 1.04 degrees, and the rolling speed is 350 ~ 550mpm. Referring to FIG. 8, before the bearing block limiting device is installed, that is, in the case of applying a conventional combined cross rolling mill, during rolling, within the rolling mill housing 100, the lower working roll bearing block 104 is located at A position shift of approximately 1.2 mm occurs at the entrance side of the rolled material in the conveyance direction. In contrast, after the bearing block limiting device is provided, that is, the case of the paired cross rolling mill shown in FIG. 1 (a) and FIG. 1 (b) of the present invention is applied regardless of the rolling load. It is reported that the position deviation of the bearing seat 4 is less than 0.1 mm. It can be seen that the position shift of the Xingkun bearing block 4 can be prevented. In addition, as shown in FIG. 10, the positions of the lower work roll bearing blocks 4, 104 are embedded in the thin-lined sleeve 20, and the eddy current type distance sensor 50 is embedded. Find the distance between 50 and the lower work roll bearing block 4, 104. The output signal of the eddy current distance sensor 50 is taken into the amplifier 51, and the output of the amplifier 51 can be used to constantly monitor the activities of the work roll bearing blocks 4, 104. Furthermore, Figs. 1 (a) and 1 (b) of the present invention are applied to the first to seventh stations (F1 to F7) of the finishing rolling mill 46 of the hot rolling production line 40 shown in Fig. 7 ) Shown in the paired cross rolling mill (only the bearing block restraining device for pressing the working roll bearing block) and the paired cross 20042004114 shown in Fig. 2 (a) and Fig. 2 (b), as shown in the figure of application 16 (a), Fig. 16 (b) shows the rolling condition of the rolling mill. Compare and review the error of the differential load. Figure 9 shows the relationship of the differential load in the actual hot rolling operation of the fourth F4. In the case where the bearing block limiting device is not provided, the paired crossing shown in Fig. 16 (a) and Fig. 16 (b) is known. In addition, a differential load close to 600 kN was found. In contrast, in the case of the bearing block limiting device of the work roll and bearing block, the paired cross rolling mill white 'load error shown in Fig. 1 (a) and Fig. 1 (b) is also reduced to 4 0 0 k N. In addition, in the case where the bearing block limiting device of the Xingkun bearing block and the forced back bearing bearing limiting device are set at the same time, that is, when the paired cross rolling mill of FIG. 2 (a) of the present invention is applied, the differential load is the same. The error is reduced below. In the above, it has been explained that the present invention is applied to a hot rolling production line. For example, the present invention can also be applied to a cold rolling line rolling machine 66 shown in FIG. In Fig. 11, the component symbol 6 1 is the entrance detection 6 5 and 6 7 are the tension rolls, 6 3 is the welding machine, 6 4 is the feed breaker, and 6 9 is the reel. In addition, the present invention can also be applied to an external double-cross paired cross rolling mill and work rolls alone (industrial availability). As described above, the cross-roll rolling mill according to the present invention is a cross-roll rolling mill. In the rolling method, a simple machine roller bearing seat of the spring is forced to the roll offset direction, thereby preventing the position shift in the gap, and the snake 312 / Invention Specification (Supplement) / 93 -05/93107638, for cross rolling 0 rolling load and condition, that is, the situation of the rolling mill should be set to apply the situation 0, the difference is to force the bearing seat of the working rolling seat as shown in Figure 2 (b). The example shown is as low as 150 kN, but the finished 60, 68, and 68 discs are cut-for-roll mills with a single cross cut. And the use of this structure will work the rolling bearing housing, bending, 32 200422114 failure and other failures. In addition, in addition to the work-rolling bearing housing, the back-supporting shaft is forced by the simple mechanism of the spring to the roll offset direction to prevent the position of each bearing from being displaced in the gap, and the work-rolling-friendly The occurrence of cross angles (rolling cross angles), and the occurrence of such occurrences can be suppressed as much as possible, which can effectively prevent troubles such as meandering and bending breakage of the rolled material. In addition, as a forcible work rolling Iku bearing housing or further forcing the back mechanism, the use of springs can avoid the difficulty of installing hydraulic cylinders and hydraulic piping in a narrow space that does not interfere with rolling and roller bearing housings, so it can be cheap. And highly reliable device. In addition, by supplying lubricant to the spring retainer and the sliding part of the bearing housing bushing, the lubricant does not flow due to cooling water such as rolls, cooling water, and cooling water in the bearing housing, so that a good lubrication condition can be maintained and reduced. Expenses for repair and maintenance of spring retainer barrels. [Brief description of the drawings] Fig. 1 (a) shows the first embodiment of the cross roll rolling machine of the present invention. Fig. 1 (a) is a schematic view of the cross roll rolling machine viewed from the operation side. Fig. 1 (b) is a drawing. AA arrow view in 1 (a). Fig. 2 (a) shows a second embodiment of the cross-roller rolling mill of the present invention. Fig. 2 (a) is a schematic view of the cross-roller rolling mill viewed from the operation side. Fig. 2 (b) is a view of Fig. 2 (a). BB arrow view. FIG. 3 is a graph showing a change in a thrust coefficient with respect to an intersection angle (fork angle) of a work rolling parent and a back support parent. 312 / Invention Manual (Supplement) / 93-05 / 93107638 The bearing is based on the thrust curve of the back roller of the roller shaft, the difficulty of the machine casing of the broken roller, the lubricating condition, the shape of the bushing, and the shape of the picture ,, Figure, rollover 33 200422114 Figure 4 is a top view showing the situation where the work roll bearing seat or the back roller bearing seat has a position shift. Fig. 5 is a graph showing a relationship between a differential load and a thrust force in a case where a work roll bearing housing or a back roller bearing housing is shifted. Fig. 6 is a diagram showing a state of a moment occurring in a front view of the rolling mill in a case where thrust is generated. FIG. 7 is a schematic configuration diagram of a hot rolling line. Fig. 8 is a graph showing the relationship between the rolling load of the fourth stand F4 and the position shift amount of the lower work roll and bearing block which is the operating side on the cross head side. Fig. 9 is a graph showing the relationship between the rolling load and the differential load in the actual hot rolling operation of the fourth F4. Fig. 10 is an explanatory diagram of the structure of the device for measuring the position of the bearing seat of the work roll. FIG. 11 is a schematic configuration diagram of a cold rolling line. Fig. 12 (a) and Fig. 12 (b) are explanatory diagrams of the principle of the cross roll rolling machine. Fig. 13 is a view showing the distribution of the width direction of the material to be rolled showing the opening degree of the upper and lower work rolls. Fig. 14 (a) is an explanatory diagram of a conventional rolling mill. Fig. 14 (b) is an explanatory diagram of the principle of the cross roll mill. FIG. 15 is a schematic configuration diagram of a main configuration of a cross roll mill. Fig. 16 (a) shows a conventional cross-roller rolling mill, Fig. 16 (a) is a schematic view of the cross-roller rolling mill viewed from the operation side, and Fig. 16 (b) is Fig. 16 (a ) AA arrow view. 34 3] 2 / Invention Specification (Supplement) / 93-05 / 93107638 200422114 Figures 17 (a) and 17 (b) are diagrams showing the deformation of the rolling machine casing. (Description of component symbols) a Open π degree b Open V degree c Cross center (cross point) Cl to C2 Offset amount d Clearance F 1 to F7 First 7th stage S Rolled material T Bending surface θ Crossing angle 1 Up and down Work rolls 2 Upper and lower back rolls 3 Upper work roll bearing blocks 4 Lower work roll bearing blocks 5 Upper back roll bearing blocks 6 Lower back roll bearing blocks 8 Cross heads 9 Upper work roll pivot blocks 10 Upper work roll pivots Block lining sleeve 11 Upper back roller pivot block 12 Upper back roller pivot block lining sleeve 13 Lower cross head bushing 14 Lower cross head bushing 312 / Invention Manual (Supplement) / 93-05 / 93107638

35 200422114 15 Screw 16 Nut 17 Bearing housing bushing 18 Bearing housing restraint 19 Spring retainer 20 Thin bushing 2 2 Spring 22 Bearing restraint 23 Spring retainer 24 Thin bushing 25 Spring 26 Bearing bushing Sleeve 30 Rolling machine casing 40 Hot rolling production line 41 Addition of 4 furnaces 42 Finishing and pressing machine 43 Rough rolling machine 44 End shearing machine 45 Rust removing device 46 Finishing rolling machine 47 Cooling 1¾ 48 Winding Device 50 Eddy current distance sensor 5 1 Amplifier 312 / Invention manual (Supplement) / 93-05 / 93107638

36 200422114 60 Cold rolling line 6 1 into the V-side circuit 62 ^ 65 ^ 6 7 pull 1 tight rolling,% 6 3 welding machine 64 feed tray 66 finishing rolling machine 68 shearing machine 69 winding plate 1 00 rolling Machine housing 10 1 Upper and lower working rolls 1 02 Upper and lower back rollers 1 03 Upper work roller bearing seat 1 04 Lower work roller bearing seat 10 5 Upper back roller bearing seat 1 06 Lower back roller bearing seat 1 07, 1 08 Cross. Fork 1 09 Upper work roll pivot block 110 Upper work roll stern block bushing 111 Upper back roller pivot block 112 Upper back roller frame shaft block bush 113 Lower cross head bush 114 Crossed head almost sleeve 115 screw 116 nut

200422114

Claims (1)

200422114 Scope of patent application: 1. A cross roll rolling machine is a cross roll rolling machine provided with a work roll bearing support rotatably supporting work rolls and a back support roll support rotatably supporting back work rolls It is characterized in that: a spring is provided to force the work roll bearing seat in the direction in which the work roll is offset during the process of rolling the material to be rolled. 2. The cross-roller rolling machine according to item 1 of the scope of patent application, wherein a spring is further provided, which presses the back in the direction of the deviation of the back support I during the rolling of the material to be rolled. Support rollers and bearing blocks. 3. The cross-roller rolling mill according to item 1 or 2 of the patent application scope, wherein the lubricant is supplied between the spring holder and the bearing housing bushing, and between the crosshead and the crosshead bushing. 4. A rolling method using a cross-roller rolling mill, which uses a cross-roller rolling mill equipped with a work roll bearing support rotatably supporting work rolls and a back support roll support rotatably supporting a back support roll. The rolling method is characterized in that: when the material to be rolled is rolled, the spring is rolled while the bearing holder of the work roll is forced to the direction in which the work roll is offset during the rolling process. 5 · The rolling method using the cross-roller rolling mill according to item 4 of the scope of patent application, wherein, during the rolling of the material to be rolled, the spring-backed roller bearing seat is forced into the rolling process by the spring edge. In the direction in which the above back-up rolls are offset, rolling is performed. 6 · The 200422114 rolling method using a cross roll rolling machine as described in item 4 or 5 of the scope of patent application, wherein between the spring retainer and the bearing seat liner sleeve, and between the crosshead and the crosshead liner sleeve Supply lubricant.