JPH0318407A - Roll for rolling h-shape steel - Google Patents

Abstract

PURPOSE:To deal with various dimensions and to realize rolling the H-shape steel of high accuracy and efficiency by forming the fluid pressure from a hydraulic source so as to be applicable to a hydraulic chamber through a fluid passage which is provided in a roll shaft. CONSTITUTION:The distance between the outside surfaces of sleeves 3, 4 is determined so as to correspond with the dimension of the H-shape steel to be rolled and a nut 8 is abutted on the sleeve 3 and is fixed. Next, when the fluid pressure from the hydraulic source 19 is applied to the hydraulic chamber 11 through a rotary joint 18 and the fluid passages 14, 13, a ring 9 strongly pressed to the sleeve 3. In that state, when the roll shaft 7 is revolved through a coupling 24, the sleeves 3, 4 also are integrately revolved with the roll shaft 7. And then, other horizontal rolls 1 and vertical rolls 2, 2 which are paired up are similarly revolved too. Therefor, the H-shape steel 25 can be rolled. In that case, rolling load is acted on the sleeves 3, 4, but the sleeves 3, 4 can smoothly perform rolling work because the fluid pressure in the hydraulic chamber 11 is acted with rolling load.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a roll used for rolling H-section steel, and in particular to a width-adjustable H roll suitable as a universal horizontal roll or edger roll. This relates to rolls for rolling shaped steel. [Prior art] Conventionally, horizontal rolls and edge 11 rolls of a universal mill have been used in rolling H-section steel. Figures 4 and 5 are a partially sectional front view and a front view, respectively, showing examples of a conventional horizontal roll and an edger roll. First, in Figure 4, 5 is the sleeve. The roll shaft 37 is formed into a hollow cylindrical shape made of wear-resistant material, and is fitted, for example, by shrink fitting, to the roll shaft 37 formed of a tough material. Use it by supporting the section. 25 is an H-beam steel, and the sleeve 5 rolls the web portion 25a and the flange portion 25b. Next, in FIG. 5, the edger roll 44 is used.
Mainly, the state in which the tip end portion of the flange portion 25b of the H-beam 25 is being rolled or shaped is shown. In this case, the entire edger roll 44 can be made into an integral type, but only the portion that comes into contact with the H-shaped sea bream 25 can also be made into a sleeve like the one shown in FIG. 4.
In horizontal rolls and edger rolls as above. In the case of assembly-type rolls in which the part that comes into contact with the material to be rolled is formed as a sleeve and shrink-fitted onto the roll shaft, the sleeve is almost integrally formed, so it is considered that it is integrally formed including the roll shaft. Similarly, there are the following problems. In other words, in a horizontal roll as shown in Figure 4. The amount of wear on the side wall 5a of the sleeve 5 must be limited to a certain range within the allowable tolerance of the product dimensions of the H-type W425. In the case of a rough stand, the side wall 5 of the sleeve 5
The slope of a is large, and the amount of modification per one time to correct deformation or roughness due to wear is large, and in the case of a finishing stand, the side wall 5 of the sleeve 5 is
The problem is that the roll consumption rate is destined to be high due to the fact that the slope of a is very small, so it has to be downsized for another size of H-shaped steel after only one use. be. Further, it is necessary to prepare horizontal rolls or edger rolls with different width dimensions of the sleeve 5 shown in FIG. 4, for example, for each product series. Not only does the number of rolls in stock become enormous, but it also requires a large amount of time and man-hours to reassemble the rolls at each stand, resulting in a reduction in production efficiency and productivity. In order to solve the above problems, for example,
An assembly type roll as described in Publication No. 728 has been proposed. Figure 6 is a partially sectional front view showing an example of an assembly type roll, and the same parts are designated by the same reference numerals as in Figures 4 and 5 above. In FIG. 6, a rib-like protrusion 40 is provided in the middle of the roll shaft 39, and splines 4l are provided on both sides thereof. 6 is the sleeve. It is formed in the shape of a hollow disk, and a concave and convex portion (not shown) is formed on the inner surface to engage with the spline 4l. It is fixed to the lip-shaped protrusion 40 by multiple sets of bolts 42 and nuts 43. With the above structure, by replacing the split spacer 38, the roll width, that is, the width dimension between the outer surfaces of the sleeves 6, 6 can be adjusted. The problem mentioned above is the decrease in the number of roles held. Effects such as improved productivity can be expected. [Problem to be solved by the invention] Based on the above improvement proposal. Although some of the conventional problems can be solved, the following problems still remain.
First, it is necessary to prepare divided spacers 38 of various thicknesses to suit each product size, and attachment to the rib-shaped protrusion 40 together with the sleeve 6 and adjustment after attachment are complicated. These tasks require time and man-hours, leading to a decrease in production efficiency. In addition, rolling work is hot and high-load work. Deformation or distortion occurs in the roll alignment member, and even when the same split spacer 38 is used, slight errors occur in dimensions and other aspects, making adjustments after assembly complicated. Furthermore, it is impossible to replace the sleeve 6 and the split spacer 38 with the rolls assembled in the stand, and therefore the time and man-hours required to rearrange the rolls in each stand are still large. There is a problem. In recent years, H
The requirements for improving the dimensional accuracy of steel sections are becoming increasingly strict, and the emergence of high-precision and highly efficient rolling rolls for H-section steel is desired. The present invention solves the problems existing in the above-mentioned prior art. The purpose of the present invention is to provide a roll for rolling H-beam steel that can accommodate various dimensions and perform high-precision, high-efficiency rolling. [Means for solving the problem] To achieve the above purpose. First, in the first invention, two hollow cylindrical sleeves are attached to the roll shaft coaxially and rotatably together with the roll shaft, and at least one of the sleeves is formed to be movable in the axial direction. Recesses having an annular cross section are provided in the center so as to face each other, and a bowl-shaped ring having an axial length spanning both sleeves is fitted into these recesses, and another bowl-shaped ring is inserted into the bowl-shaped ring of the bracket. A ring is fitted so as to be movable in the axial direction, and a hydraulic pressure chamber having an annular cross section is formed by at least both of the rings, and hydraulic pressure from a hydraulic pressure source is transferred to the hydraulic pressure chamber through a fluid passage provided in the roll shaft. We adopted a technical means to form a pressure chamber that can be applied to it. Next, in a second invention, in addition to the technical means of the first invention, a nut is provided on the outside of the sleeve formed to be movable in the axial direction, and is screwed into the external thread formed on the roll shaft. A technical measure has been added in which this nut is brought into contact with the outer surface of the sleeve so that the distance between the outer surfaces of both sleeves can be adjusted. Furthermore, in a third invention, the technical means of the second invention is provided. A plurality of teeth are carved on the outer periphery of the nut or an annular gear is fixed together to form an outer peripheral gear, and a shaft end gear is fixed to the end of the roll shaft. A mating gear provided on a connecting shaft having a differential gear mechanism and a rotation reversing mechanism and connected to a drive source is engaged with the outer peripheral gear and the shaft end gear. A technical measure has been added to make the tooth ratio of the outer gear and shaft end gear the same as that of each mating gear. [Effect] Due to the above structure. For example, if hydraulic pressure is applied to the hydraulic pressure chamber formed by the bowl-shaped ring and other rings fitted into the recesses of both sleeves. It can withstand the rolling load acting on the sleeve. Able to perform specified H-shaped steel rolling work. Furthermore, by placing a nut that engages with a male thread carved on the roll shaft on the outside of the sleeve, which is formed to be slidable, it is possible to adjust the distance between the outside surfaces of both sleeves, making it possible to adjust the distance between the outside surfaces of both sleeves. It can be used for rolling steel. Furthermore, a gear is integrally formed on the outer periphery of the above nut. By connecting this outer gear to a differential gear mechanism and a rotation reversal mechanism, and fixing and rotating the above-mentioned nut, the distance between the outer surfaces of both sleeves can be secured, changed, or adjusted while the roll is assembled in the stand. Can be done. [Embodiment] Figure 1 is a partially sectional front view showing an embodiment of the present invention.
Identical parts are indicated by the same reference numerals as in Figs. 4 to 6 above. In Figure 1, 1 is a horizontal roll and 2 is a vertical roll, which are used to monitor a specific stand of the universal mill. H
This is for rolling section steel 25. 7 is the roll axis.
For example, it is made of a tough material such as cast steel or forged steel, and a hollow cylindrical sleeve 3.4 made of a wear-resistant material such as alloyed cast iron is fitted in the middle part.
The sleeve 4 on the right side is fixed to the roll shaft 7 by, for example, shrink-fitting means, and the sleeve 3 on the left side is fitted to the roll shaft 7 so that it can rotate integrally and move in the axial direction. 8 is a nut.
It is screwed together with a male thread 8a provided on the outer periphery of the roll shaft 7, and brought into contact with the outer surface of the sleeve 3. A hydraulic chamber 1l is provided between the sleeves 3 and 4 as described later. 13.14
is a fluid passage. A hole is provided between the end of the roll shaft 7 and the hydraulic pressure chamber 11. A rotary joint 18 is provided at the end of the roll shaft 7 and connects the hydraulic pressure source 19 and the fluid passage 14. A coupling 24 is provided at the other end of the roll shaft 7 and is connected to a %I movement device (not shown) so as to transmit power. Next, Figure 2 is an enlarged sectional view of the main part of Figure 1. Identical parts are designated by the same reference numerals as in FIG.

In Figure 2, 16 is the inner sleeve. It is shaped like a hollow cylinder. Outer sleeve 16 formed into a hollow cylindrical shape
A is fixed by shrink fitting, for example, to form the sleeve 3. A key 15 is provided protruding from the inner peripheral surface of the inner sleeve 16, and is engaged with a key groove 15a provided on the outer peripheral surface of the roll shaft 7 so as to be slidable in the axial direction. Next, 3a and 4a are recesses, which are formed in the center of the sleeve 34 to have an annular cross section, and are provided facing each other. LO is a bowl-shaped ring, and the recess 3a
, 4a in length in the axial direction and are fitted. 9 is a ring. Along with forming it into a hollow cylindrical shape. Bowl-shaped ring 1
0 and the outer periphery of the roll shaft 7. It is also formed so that it can move in the axial direction with both. 12 is a sealing member. Between the sleeves 3, 4 and the bowl-shaped ring 10, respectively, the bowl-shaped ring 1
0 and the ring 9, and the roll shaft 7 and the bowl-shaped ring 10
and ring 9. 17 is an air vent hole. Bowl-shaped ring 10, ring 9 and roll shaft 7
It communicates with the hydraulic pressure chamber 11, which has an annular cross section formed by the hydraulic pressure chamber 11, and is normally closed off with a plug or the like. Based on the above structure, the operation will be described next. First, in Figures 1 and 2, the distance between the outer surfaces of the sleeve 3.4 is shown. The napht 8 is determined to correspond to the dimensions of the H-section steel to be rolled, and is fixed in contact with the outer surface of the sleeve 3. Next, when hydraulic pressure from the hydraulic pressure source 19 is applied to the hydraulic chamber l1 via the rotary joint 18 and the fluid passage 14.13, the ring 9
The sleeve 3 is firmly pressed against the sleeve 3.

In this state, the roll shaft 7 is
When the sleeve 3.4 is rotated, the sleeve 3.4 also rotates together with the roll shaft 7. Note that the other horizontal rolls 1 and vertical rolls 2.2 forming the pair are also rotated at the same time. Depending on the operating conditions above.
H-section steel 25 can be rolled. In this case, a rolling load acts on the sleeve 3.4, but the hydraulic pressure in the hydraulic chamber 11 acts against the rolling load.
Rolling work can be carried out smoothly without deformation or collapse of the roll. Next, when changing the size of the H-section steel to be rolled, it is necessary to change the distance between the outer surfaces of the sleeve 3.4.
First, by canceling the application of liquid pressure in the liquid chamber l1 and rotating the nasoto 8. All you have to do is move the sleeve 3 in the axial direction. After fixing the sleeve 3 and nut 8 in place,
If hydraulic pressure is applied again to the hydraulic pressure chamber ll, the next rolling operation will be performed in St.
You can do U*. Note that the work of moving the sleeve 3 or the fine adjustment work between works can be carried out with the horizontal roll l assembled in the stand, and there is no need to remove it from the stand. FIG. 3 is a sectional view of main parts showing another embodiment of the present invention,
Identical parts are indicated by the same reference numerals as in Figures 1 and 2 above. In Fig. 3, 8b is the outer peripheral gear, and the napht 8
It is formed by carving multiple teeth at equal intervals around the outer circumference. Note that an annular gear may be created separately and fixed integrally to the outer periphery of the nut 8 to form the outer peripheral gear 8b. Next, 27 is a shaft end gear, which is fixed to the shaft end of the roll shaft 7 so as to be able to rotate integrally therewith. Next, 33 is a connecting shaft, which is rotatably installed in the lower part of the bearing box 22 via bearings 31 and 32. Connection shaft 3
A gear 26 is fixed to the right end of the gear 3 and meshes with the outer gear 8b, and the left end is connected to the rotation reversing mechanism 30 and the differential gear mechanism 29. A gear 28 is fixed to the left end of the differential gear mechanism 29 and meshed with the shaft end gear 27. In this case, the tooth number ratio between the outer gear 8b and the gear 26 is . It is necessary to form the shaft end gear 27 and the gear 28 to have the same tooth number ratio. 35 is a drive motor. It is connected to the differential gear mechanism 29 via the gear 34 so that power can be transmitted. With the above structure, the distance between the outer surfaces of the sleeve 3.4 is determined to correspond to the dimensions of the H-section steel to be rolled. If the roll shaft 7 is rotated while the drive motor 35 is stopped. H-section steel can be rolled in the same manner as shown in Figures 1 and 2 above. In this case, the outer peripheral gear 8b and the gear 26, and the shaft end gear 27 and the gear 28 rotate in a meshed state, but each has the same tooth ratio. Outer gear 8b, shaft end gear 27, and gear 26
and gear 28 rotate in the same direction and at the same number of rotations. Therefore, no relative rotation occurs between the napht 8, which is integrally formed with the outer gear 8b, and the roll shaft 7. You can expect the effect of preventing the nut 8 from rotating. Next, when changing the size of the H-shaped steel to be rolled, that is, when changing the distance between the outer surfaces of the sleeve 3.4, the application of hydraulic pressure in the hydraulic pressure chamber 11 is released and the drive motor 35 is activated. ．． Gear 34, differential gear mechanism 29, rotation reversal mechanism 30
, the outer peripheral gear 8b is rotated via the connecting shaft 33 and the gear 26. Simply move nut 8 in the axial direction. In addition, when increasing the distance between the outer surfaces of sleeve 3.4. This may be carried out with hydraulic pressure applied to the hydraulic chamber 11. Further, the nut 8 can be moved in the axial direction even while the roll shaft 7 is rotating, and in this case, a difference occurs in the rotational speed between the gear 26 and the gear 28, but this difference in rotational speed is caused by the differential rotation. gear machine fl
29, the rotation of the roll shaft 7 is not hindered at all, and the nut 8 can be moved smoothly and reliably in the axial direction. Therefore, it is naturally possible to adjust the distance while detecting the distance between the outer surfaces of the sleeve 3.4 during the rolling operation. In this case, the relationship between the axial movement distance of the nasoto 8 and the rotation speed of the gear 34 is known in advance. In order to obtain a predetermined moving distance, it is naturally possible to form the drive motor 35 by, for example, a pulse motor and control the number of rotations. In this example, an example was described in which only one side of the sleeve was formed to be movable in the axial direction of the roll shaft.
Even if both sleeves are formed to be movable in the axial direction of the roll shaft, the effect is the same. Further, the bowl-shaped ring and/or ring forming the hydraulic pressure chamber may be formed integrally with the sleeve. Furthermore, as a means for integrally rotating the roll shaft with a sleeve formed to be movable in the axial direction of the roll shaft. The keys are not limited to those shown in this example. A spline type or other known means can be used. [Effect of the invention] Since the present invention has the structure and operation as described above,
It is possible to easily roll H-beam steel with high precision and constant external dimensions, and there is no need to have a huge number of rolls for each product series. It is possible to significantly reduce roll consumption. In addition, since the distance between the outer surfaces of the sleeves can be changed and adjusted without removing the roll from the stand, the time and man-hours required for reassembly can be significantly reduced, and production efficiency and productivity can be greatly improved. ．． Plan. Figure 6 is a partially sectional front view showing an example of a conventional assembly type roll. 3.4: Sleeve, 7: Roll shaft. 8: Naft, 8b:
Peripheral gear. 9: Ring, 10: Bowl-shaped ring, 1l: Hydraulic pressure chamber, 29: Differential gear mechanism. 30: Rotation reversal mechanism. 33:
connection axis.

Claims (3)

[Claims] (1) Two hollow cylindrical sleeves are fitted to the roll shaft coaxially and rotatably together with the roll shaft, at least one of the sleeves is formed to be movable in the axial direction, and a cross section is formed at the center of the sleeve. Concave portions formed in annular shapes are provided to face each other, a bowl-shaped ring having an axial length extending over both sleeves is fitted into these concave portions, and another ring is inserted into this bowl-shaped ring in an axial direction. In addition to being movably fitted, at least both of the rings form a hydraulic pressure chamber having an annular cross section, and hydraulic pressure from a hydraulic pressure source can be applied to the hydraulic pressure chamber via a fluid passage provided in the roll shaft. A roll for rolling H-shaped steel, characterized in that it is formed into a roll. (2) A nut is provided on the outside of the sleeve, which is formed to be movable in the axial direction, and which engages with a male thread cut into the roll shaft. H according to claim (1), which is formed so as to be adjustable.
Rolls for rolling shaped steel. (3) A plurality of teeth are carved on the outer periphery of the nut or an annular gear is fixed together to form an outer peripheral gear, and a shaft end gear is fixed to the end of the roll shaft to create a differential gear mechanism and rotation reversal. A mating gear provided on a connecting shaft having a mechanism and connected to a drive source meshes with the outer peripheral gear and the shaft end gear, and the ratio of the number of teeth between the peripheral gear and the shaft end gear and each of the mating gears is formed to be the same. The H-shaped steel rolling roll according to claim (2).