CN118106409A - Roller changing bracket for working roller of roller straightener - Google Patents

Abstract

The invention relates to a work roll changing bracket of a roll straightener, which belongs to the technical field of roll straighteners and comprises an upper roll box adjusting device and a lower roll box adjusting device which are arranged up and down; the upper roller box adjusting device comprises an upper movable bracket with adjustable height, middle couplings matched with the number of upper working rollers of the straightener are arranged on the upper movable bracket, and Z-direction positioning structures of the upper roller box are arranged at two ends of the middle couplings; the lower roller box adjusting device comprises a lower movable bracket with height self-adaptive adjustment, an intermediate coupler matched with the number of lower working rollers of the straightener is arranged on the lower movable bracket, and two ends of the intermediate coupler are provided with lower roller box Z-direction positioning structures. According to the invention, the butt joint between the upper roller box and the lower roller box is realized through the Z-direction positioning structure of the upper roller box and the Z-direction positioning structure of the lower roller box, and the butt joint between the working roller and the intermediate coupling is realized through the speed difference motion that the working roller does not rotate and the intermediate coupling rotates, so that the rapid replacement of the roller box is realized.

Description

Roller changing bracket for working roller of roller straightener

Technical Field

The invention belongs to the technical field of roller straighteners, and relates to a roller changing bracket of a working roller of a roller straightener.

Background

The roll straightener is a key device in the sheet metal strip shape correcting process, and is widely applied to a sheet metal strip heat treatment unit and a transverse cutting or longitudinal cutting unit, and plays a decisive role in the final sheet shape quality of a sheet metal strip. The working rolls of the straightener are structurally divided into an upper row and a lower row which are respectively an upper roll box and a lower roll box. When the straightener works, the working rolls in the roll boxes are directly contacted with the metal plate strip, and straightening torque required for straightening the metal plate strip is usually transmitted to the working rolls through a coupling connected with a gear distribution box, and the gear distribution box is driven by a motor. In engineering application, the connection between each working roll in the roll box and the coupler is usually in a flat key or spline mode, and for a high-strength metal plate and strip straightener, a spline connection mode is usually adopted between the working roll and the coupler due to the fact that large straightening moment is needed.

When the multi-roller straightener is used for replacing roller boxes, as the roller diameters of the supporting rollers and the working rollers in the new roller boxes and the old roller boxes are different, the height difference exists between the center of the working roller in the new roller boxes and the center of the spline housing on the coupler in the vertical direction, and the height difference compensation is needed to be considered when the roller boxes are replaced, even if the straightener is structurally provided with an adjusting mechanism or means for the height difference compensation, the problem of phase difference between the gear teeth of the spline shaft of the working roller and the gear teeth of the spline housing still exists, so that the spline shaft of the working roller cannot be smoothly inserted into the spline housing. Therefore, to smoothly complete replacement of the new and old roll cassettes, the following three conditions are satisfied:

1. The center line of the working roller and the center line of the spline housing on the coupler are centered in the height direction (defined as Z direction, see figure 1).

2. The center line of the working roll and the center line of the spline housing on the coupler are centered in the front-back direction (namely, the running direction of the steel plate is defined as X direction, and the axis of the working roll is defined as Y direction, see figure 1).

3. Ensuring that the spline shaft gear teeth are in phase with the spline housing gear teeth, namely: the spline shaft can be correctly inserted into the spline housing.

In many levelers, some levelers do not have any adjusting mechanism or means satisfying the above three conditions, only manually and one by one, which is quite time-consuming and laborious, and some levelers only have simple functions of centering the old and new roll boxes in height, so that when the old and new roll boxes are replaced, not only the center of the spline shaft of the working roll and the spline housing of the coupling is aligned, but also the phase alignment of the teeth of the spline shaft and the teeth of the spline housing is performed, the operation mode mainly takes 8-16 hours mainly for manual operation, the roll replacement operation takes up to 8-16 hours, even if part of levelers are provided with height adjusting mechanisms in an electric or hydraulic mode, the structure is complex, the reliability is low, the use effect is not obvious, and the more rolls are time-consuming and laborious, which seriously affect the production efficiency and the production rhythm, especially for continuous heat treatment production lines, the heating furnaces in subsequent procedures consume energy sources, the public and auxiliary systems of the production lines also need to keep running, and further increase the production running cost of enterprises as a whole.

Therefore, it is very necessary to develop a new roll changing mechanism of the roll straightener, which can realize the rapid replacement of the roll box when the new roll box and the old roll box are replaced, reduce the roll changing time, further improve the working efficiency of the machine set and reduce the production and operation costs of the machine set.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a roll changing bracket for a work roll of a roll straightener, so as to realize rapid replacement of a roll cassette.

In order to achieve the above purpose, the present invention provides the following technical solutions:

The working roll changing bracket of the roll straightener comprises an upper roll box adjusting device and a lower roll box adjusting device which are arranged at the transmission side of the straightener and are arranged up and down; the upper roller box adjusting device comprises an upper fixed bracket connected with the straightener and an upper movable bracket positioned below the upper fixed bracket, wherein middle couplings matched with the number of upper working rollers of the straightener are arranged on the upper movable bracket, the upper movable bracket is connected with a lifting device arranged on the upper fixed bracket to adjust the height position, and the upper movable bracket is in butt joint with an upper roller box through an upper roller box Z-direction positioning structure arranged at two ends of the upper movable bracket; the Z-direction positioning structure of the upper roller box comprises an upper positioning support fixedly connected with the upper movable bracket, and the upper positioning support is provided with an upper positioning bolt guide hole matched with an upper positioning bolt arranged at the front end of the upper roller box; the lower roller box adjusting device comprises a lower fixed bracket and a lower movable bracket positioned above the lower fixed bracket, wherein middle couplings matched with the number of lower working rollers of the straightener are arranged on the lower movable bracket, the lower movable bracket is connected with a height self-adaptive adjusting structure arranged on the lower fixed bracket so as to realize self-adaptive adjustment of the height position, and the lower movable bracket is in butt joint with the lower roller box through a lower roller box Z-direction positioning structure arranged at two ends of the lower movable bracket; the Z-direction positioning structure of the lower roller box comprises a lower positioning support fixedly connected with the lower movable bracket, and the lower positioning support is provided with a lower positioning bolt guide hole matched with a lower positioning bolt arranged at the front end of the lower roller box; the middle coupler comprises a spline sleeve, one end of a spline can be matched with a spline shaft at the end of a working roller of the straightener, the other end of the spline shaft is connected with a spline shaft matched with the spline shaft, the other end of the spline shaft can be connected with a main transmission system of the straightener, a fixed ring is arranged on the spline shaft, at least 2 pull rods which are in sliding connection with the spline shaft and are parallel to the spline shaft are arranged on the fixed ring, the pull rods are fixedly connected with the spline sleeve, a first elastic piece is arranged between the fixed ring and the spline sleeve, and the first elastic piece is sleeved on the spline shaft; the first elastic member may be a spring; the lifting device can be hydraulically driven or motor driven.

Optionally, the lifting device comprises an upper guide rod arranged at two ends of the upper movable bracket in vertical arrangement, the lower end of the upper guide rod is in sliding connection with an upper movable bracket guide hole formed in the upper movable bracket and extends out of the upper movable bracket guide hole, the extending end of the lower end is provided with a first elastic piece and a first limit structure positioned below the first elastic piece so as to prevent the first elastic piece from falling out of the upper movable bracket guide hole, and the upper end of the upper guide rod penetrates through an upper fixed bracket guide hole formed in the upper fixed bracket and is connected with a linear driving mechanism arranged on the upper fixed bracket; the second elastic piece is a disc spring.

Optionally, an upper limiting plate fixedly connected with the two upper guide rods is arranged between the upper fixed bracket and the upper movable bracket so as to limit the upper limit position of the upper guide rods.

Optionally, an upper movable bracket anti-tilting structure is arranged between the upper limiting plate and the upper fixed bracket, the upper movable bracket anti-tilting structure comprises two groups of taper pin taper sleeve positioning structures distributed on two sides of a connecting line of the two upper guide rods, and the taper pin taper sleeve positioning structure comprises a positioning taper pin arranged on the upper movable bracket and extending to the upper fixed bracket and a positioning taper sleeve arranged on the upper fixed bracket and matched with the positioning taper pin.

Optionally, the positioning taper sleeve is detachably connected with the upper fixed bracket, and the positioning taper pin is detachably connected with the upper movable bracket.

Optionally, the linear drive mechanism is a hydraulic cylinder.

Optionally, the height self-adaptation adjusting structure is including arranging the lower guide bar that is vertical setting at lower movable bracket both ends, and lower movable bracket guiding hole sliding connection and stretching out lower movable bracket guiding hole down of seting up on lower movable bracket are gone up to the upper end of lower guide bar, and the upper end stretches out the end and is equipped with second limit structure in order to prevent that it from deviating from lower movable bracket guiding hole, and lower fixed bracket fixed connection of lower guide bar's lower extreme and being located lower movable bracket below is equipped with the second elastic component down between fixed bracket and the lower movable bracket, and the second elastic component is the dish spring.

Optionally, the straightening machine further comprises an X-direction pre-positioning structure, wherein the X-direction pre-positioning structure comprises a convex side guide lining plate arranged on the inner side of the straightening machine frame and corresponding to the position of the lower roller box and a guide lining plate arranged on the lower roller box and matched with the side guide lining plate.

Optionally, the upper and lower sides of the upper positioning bolt guide hole are provided with upper roller bearings protruding the upper positioning bolt guide hole to form rolling friction with the upper positioning bolt, and the upper and lower sides of the lower positioning bolt guide hole are provided with lower roller bearings protruding the lower positioning bolt guide hole to form rolling friction with the lower positioning bolt.

Optionally, the spline shaft of the intermediate coupling is connected with a spline housing of a ball tooth coupling, and the ball tooth coupling is connected with a gear distribution box of the straightener.

The invention has the beneficial effects that:

1. The upper roller box Z-direction positioning structure and the lower roller box Z-direction positioning structure are used for realizing the butt joint with the upper roller box and the lower roller box, and the working roller and the middle coupling are realized through the speed difference motion of the rotation of the working roller, so that the roller box is quickly replaced.

2. Through setting up movable bracket anti-tilting structure for go up movable bracket and can keep the horizontality, and then make intermediate shaft coupling be in the horizontality, solved the work roll that leads to because of intermediate shaft coupling slope and the problem of intermediate shaft coupling being difficult to dock.

3. By setting the X-direction preset structure, the X-direction positioning time of the roller box is shortened, and the roller changing efficiency is further improved.

4. The upper movable bracket and the lower movable bracket realize self-adaptive fine adjustment in the height direction through the disc springs, and the structure is simple, stable and reliable.

5. The quick positioning butt joint of the working roller and the intermediate coupler is realized, so that the quick replacement of the roller box is realized, the roller changing efficiency of the straightener is greatly improved, and the production and operation cost of enterprises is reduced.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view showing a construction of a roll changing carriage of a work roll of a roll leveler according to the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic view of the structure of an intermediate coupling;

FIG. 4 is a schematic structural view of an anti-tipping structure of the upper mobile carrier;

FIG. 5 is a plan view of the upper mobile carrier anti-tilt structure in a horizontal plane;

FIG. 6 is a schematic view of the structure of the upper and lower roll cassettes;

fig. 7 is a schematic structural view of the upper and lower positioning devices.

Reference numerals: the upper bracket 1, the lower bracket 2, the straightening machine frame 3, the middle coupling 4, the upper movable bracket tilting prevention structure 5, the upper roller box 6, the lower roller box 7, the ball gear coupling 8, the upper roller box Z-direction positioning structure 9, the lower roller box Z-direction positioning structure 10, the upper fixed bracket 1-1, the upper limiting plate 1-2, the upper movable bracket 1-3, the upper guide rod 1-4, the lifting hydraulic cylinder 1-5, the connecting rod 1-6, the disc spring 1-7, the locking nut 1-8, the pressing plate 1-9 and the connecting bolt 1-10, the lower fixed bracket 2-1, the lower movable bracket 2-2, the lower fixed bracket 2-2 the lower guide rod 2-3, the disc spring 2-4, the side guide lining plate 3-1, the lower cross beam 3-2, the spline housing 4-1, the spring 4-2, the fixed ring 4-3, the bolt 4-4, the spline shaft 4-5, the positioning taper sleeve 5-1, the positioning taper pin 5-2, the upper roller box base 6-1, the upper working roller 6-2, the upper positioning bolt 6-3, the lower roller box base 7-1, the lower working roller 7-2, the lower positioning bolt 7-3, the guide lining plate 7-4, the upper positioning support 9-1, the upper roller bearing 9-2, the lower positioning support 10-1 and the lower roller bearing 10-2.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 7, a roll changing bracket for a working roll of a roll straightener comprises an upper bracket 1, a lower bracket 2, a straightener frame 3, an intermediate coupling 4, an upper movable bracket anti-tilting structure 5, an upper roll box 6, a lower roll box 7, a ball tooth coupling 8, an upper roll box Z-direction positioning structure 9 and a lower roll box Z-direction positioning structure 10.

FIG. 1 is a schematic view of a work roll changing carriage of a roll leveler according to the present invention, which is illustrated by a typical 15-roll leveler for convenience of illustration, and the present invention is not limited to a 15-roll leveler, but is also applicable to other roll levelers, such as a conventional 5-21-roll leveler, in which rapid roll changing is achieved, and the straightened steel sheet 11 advances in X (left to right in the drawing) in FIG. 1. For convenience of description, the present invention defines a spatial coordinate system of the roll changing bracket, and as shown in fig. 1, the X direction is the running direction of the straightened steel sheet, the Y direction is the center line direction of the working roll, and the Z direction is the height direction.

The upper bracket 1 mainly comprises an upper fixed bracket 1-1, an upper limiting plate 1-2, an upper movable bracket 1-3, an upper guide rod 1-4, a lifting hydraulic cylinder 1-5, a connecting rod 1-6, a disc spring 1-7, a locking nut 1-8, a pressing plate 1-9, a connecting bolt 1-10 and the like.

The upper fixing bracket 1-1 is of a welded steel structure and is arranged on a transmission side housing of the straightening machine frame 3 through bolts 4-4 and used for supporting the whole upper bracket 1 and simultaneously used for installing the lifting hydraulic cylinder 1-5, and the upper fixing bracket 1-1 is also provided with a through hole for the upper guide rod 1-4 to pass through and a hole for installing the positioning sleeve 5-1.

The two ends of the upper limiting plate 1-2 are also provided with through holes for the guide rods 1-4 to pass through, the left and right upper guide rods 1-4 are rigidly fixed together through the locking nuts 1-8 to form a whole, lifting actions are realized through the connecting rods 1-6 by the lifting hydraulic cylinders 1-5, and positioning holes for installing the positioning taper pins 5-2 are also arranged on the upper limiting plate.

The upper movable bracket 1-3 is used for installing and fixing the intermediate coupling 4, so that the intermediate coupling 4 and the upper movable bracket 1-3 form a whole and synchronously move up and down along with the upper movable bracket 1-3. Guide holes through which the upper guide rods 1-4 pass are formed at two ends of the upper movable bracket 1-3 and can slide relative to the upper guide rods 1-4; the upper movable bracket 1-3 is provided with through holes for installing the intermediate shaft coupling 4, and 7 positions are provided, so that the intermediate shaft coupling 4 can synchronously move along with the upper movable bracket 1-3 in a roll changing state or a working state.

The lower end of the upper guide rod 1-4 passes through a guide hole on the upper movable bracket 1-3, a disc spring set 1-7 is arranged at the lower end, a pressing plate 1-9 and a connecting bolt 1-10 are further arranged at the bottom of the disc spring set 1-7, so that the dead weight of the upper movable bracket 1-3 and the middle coupler 4 is transmitted to the upper guide rod 1-4 for bearing through the disc spring set 1-7, and further transmitted to the lifting hydraulic cylinder 1-5 through a connecting rod 1-6.

The lifting hydraulic cylinders 1-5 are arranged on the upper fixing bracket 1-1 and are arranged to be left and right respectively, are used for lifting the upper limiting plate 1-2 upwards when changing rolls, tightly pressing the upper limiting plate on the lower bottom surface of the upper fixing bracket 1-1 and correspondingly fixing the upper guide rods 1-4 arranged on the two sides. The lifting hydraulic cylinder 1-5 and the upper guide rod 1-4 are connected together through the connecting rod 1-6 and are arranged as a left piece and a right piece. When the roller is replaced, the lifting hydraulic cylinder 1-5 drives the upper limiting plate 1-2 and the upper guide rod 1-4 upwards through the connecting rod 1-6, so that the upper limiting plate 1-2 is pressed upwards on the bottom of the upper fixing bracket 1-1, and the upper guide rod 1-4 is fixed.

The disc spring group 1-7 is sleeved below the upper guide rod 1-4 and is used for bearing the dead weight of the upper movable bracket 1-3 and all the middle couplings 4 and for self-adaptive adjustment when the position of the upper movable bracket 1-3 in the height direction changes.

The lower bracket 2 mainly comprises a lower fixed bracket 2-1, a lower movable bracket 2-2, a lower guide rod 2-3, a disc spring 2-4 and the like.

Also, the lower fixing bracket 2-1 is of a welded steel structure and is installed on the straightening machine frame 3 for supporting the whole lower bracket 2, through holes for the lower guide rods 2-3 to pass through are formed in two sides of the lower fixing bracket 2-1, and the lower fixing bracket 2-1 and the lower guide rods 2-3 are rigidly connected together.

The two ends of the lower movable bracket 2-2 are also provided with guide holes through which the lower guide rods 2-3 pass, and the two sides of the lower movable bracket 2-2 are sleeved on the lower guide rods 2-3 and can slide up and down freely relative to the lower guide rods 2-3; the lower movable bracket 2-2 is provided with a through hole for installing the middle coupling 4, 8 positions are arranged in the embodiment, and the middle coupling 4 can synchronously move up and down along with the lower movable bracket 2-2 in a roll changing state or a working state.

The lower guide rod 2-3 is provided with 2 pieces, the lower ends of the lower guide rod are respectively arranged in the guide holes at the two ends of the lower fixed bracket 2-1, and the upper parts of the lower guide rod are also connected with the corresponding through holes at the two ends of the lower movable bracket 2-2. The lower movable bracket 2-2 can slide up and down relative to the lower guide bar 2-3.

The disc spring 2-4 is sleeved on the lower guide rod 2-3, is arranged between the lower fixed bracket 2-1 and the lower movable bracket 2-2, is used for bearing the dead weight of the lower movable bracket 2-2 and all the middle couplings 4, and is used for self-adaptive adjustment when the position of the lower movable bracket 2-2 in the height direction changes.

The side guide lining plates 3-1 on the straightening machine frame 3 are used for controlling the upper roller box and the lower roller box to enter the frame 3 and then centering along the X direction, and correspondingly determining the positions of the centers of all working rollers along the X direction. The lower cross beam 3-2 in the frame is not only the bearing surface of the lower roller box in straightening, but also the track surface of the upper roller box and the lower roller box entering the frame. The side guide lining plate 3-1 is arranged at the inner side of the straightening machine frame (3) corresponding to the position of the lower roller box (7), and forms an X-direction pre-positioning structure with the guide lining plate (7-4) which is arranged on the lower roller box (7) and matched with the side guide lining plate (3-1).

The guide lining plates 7-4 symmetrically arranged on the two sides of the lower roller box 7 are used for matching with the side guide lining plates 3-1 which are also symmetrically arranged after the upper roller box and the lower roller box enter the straightening machine frame 3 to ensure that the center of a shaft end spline shaft of a working roller is aligned with the center of the spline housing 4-1 in the X direction, and the side guide lining plates 3-1 are arranged at the inner side of the straightening machine frame (3) corresponding to the position of the lower roller box (7).

Fig. 3 shows a structure of an intermediate coupling 4, wherein the intermediate coupling 4 mainly comprises a spline housing 4-1, a spring 4-2, a fixed ring 4-3, bolts 4-4 and a spline shaft 4-5, the intermediate coupling 4 is correspondingly arranged in each hole of an upper movable bracket 1-3 and a lower movable bracket 2-2, when the outer side of the spline housing 4-1 is axially extruded, the spring 4-2 is compressed, and the spline housing 4-1 moves along the compression direction of the spring 4-2. One end of the intermediate coupling 4 is connected with the gear distribution box through a ball gear coupling 8, and the other end is connected with the spline shaft 4-5 at the end of the working roll shaft. When the roll changing operation is carried out, the main transmission of the straightener keeps continuously rotating, the spline housing 4-1 on the middle coupler 4 correspondingly keeps continuously rotating, and all working rolls keep not rotating, so that the two working rolls are sleeved correctly by utilizing the speed difference of the two working rolls and the pressure generated by the compression of the spring 4-2 arranged on the middle coupler 4 in the compression process. In this example, 7 intermediate shaft couplings 4 are mounted on the upper movable bracket 1-3, 8 intermediate shaft couplings 4 are mounted on the lower movable bracket 2-2, and 15 total members are mounted on the lower movable bracket 2-2 so as to be movable up and down synchronously with the upper movable bracket 1-3 and the lower movable bracket 2-2, respectively.

Fig. 5 shows the structure of the upper movable bracket tilting prevention structure 5, and the upper movable bracket tilting prevention structure 5 comprises two groups of taper pin taper sleeve positioning structures distributed on two sides of a connecting line of two upper guide rods, and consists of a positioning taper sleeve 5-1 and a positioning taper pin 5-2. The locating taper sleeve 5-1 is arranged on the upper fixed bracket 1-1, and the locating taper pin 5-2 is arranged on the upper surface of the upper movable bracket 1-3. The upper limiting plate 1-2 can be positioned in the X direction and the Y direction in the horizontal plane by adopting a dislocation arrangement mode, so that the upper guide rod 1-4, the upper movable bracket 1-3 and the middle coupler 4 are correspondingly positioned in the X direction and the Y direction.

Fig. 6 shows the structure of upper and lower roll cassettes, the upper roll cassette 6 includes an upper roll cassette base 6-1, an upper work roll 6-2 and an upper positioning pin 6-3, and the lower roll cassette 7 includes a lower roll cassette base 7-1, a lower work roll 7-2, a lower positioning pin 7-3 and a guide liner 7-4. The upper positioning bolt 6-3 and the lower positioning bolt 7-3 are respectively arranged on the upper roller box 6 and the lower roller box 7, and the upper part and the lower part are symmetrically arranged along the X direction and are arranged by the transmission side. Upper positioning bolts 6-3 are symmetrically arranged on the upper roller box 6 on the transmission side and are used for being inserted into roller bearings of an upper positioning device 9 so as to ensure that the center of the middle coupler 4 arranged on the upper movable bracket 1-3 is aligned with the centers of all working rollers in the upper roller box 6 in the Z direction. Lower positioning bolts 7-3 are symmetrically arranged on the lower roller box 7 on the transmission side and are used for being inserted into roller bearings of the lower positioning device 10 so as to ensure that the center of the intermediate shaft coupling 4 arranged on the lower movable bracket 2-2 is aligned with the centers of all working rollers in the lower roller box 7 in the Z direction. In fig. 6, the dimension H is the total height of the upper and lower roll cassettes when they are stacked together, the dimension H1 is the height from the center of the working roll in the upper roll cassette to the horizontal center line of the upper positioning pin, the dimension H2 is the height from the center of the working roll in the lower roll cassette to the horizontal center line of the lower positioning pin, the dimensions H1 and H2 are all fixed, and the polished working roll, the intermediate roll (in the 6-fold roll system) and the support roll can be assembled again for use after polishing, but the assembly dimensions H1 and H2 are correspondingly reduced due to the change of the roll diameters thereof, so that the respective corresponding dimensional change amounts can be ensured by adjusting the dimensions M1 and M2, namely, the positions of the upper positioning pin 6-3 and the lower positioning pin 7-3 are adjusted to ensure that the position dimensions H1 and H2 are unchanged, so that the spline shaft center on the working roll and the spline sleeve 4-1 center are always aligned in the Z direction when the roll is replaced. The guide lining plates 7-4 symmetrically arranged on the two sides of the lower roller box 7 are used for matching the side guide lining plates 3-1 which are also symmetrically arranged after the upper roller box and the lower roller box enter the straightening machine frame 3 to ensure that the center of the shaft end spline shaft of the working roller is aligned with the center of the spline housing 4-1 in the X direction.

The ball gear coupling 8 is used to transmit the straightening moment to the correspondingly connected upper work roll 6-2 or lower work roll 7-2 via the intermediate coupling 4.

Fig. 7 shows a schematic structural diagram of an upper roller box Z-direction positioning structure 9 and a lower roller box Z-direction positioning structure 10, wherein the upper roller box Z-direction positioning structure 9 comprises an upper positioning support 9-1 and an upper roller bearing 9-2, the lower roller box Z-direction positioning structure 10 comprises a lower positioning support 10-1 and a lower roller bearing 10-2, a dimension H1 'in the figure is a height value from a symmetrical center line of the upper and lower upper roller bearings 9-2 to an axis of an upper middle coupling 4 in the upper roller box Z-direction positioning structure 9, and a dimension H1' =h1, and a dimension H2 'is a height value from a symmetrical center line of the upper and lower roller bearings 10-2 to an axis of the lower middle coupling 4 in the lower roller box Z-direction positioning structure 10, and a dimension H2' =h2, so that alignment of all center lines of working rollers and all center lines of the middle couplings 4 in the Z-direction can be ensured during roller changing.

The upper roller bearings 9-2 in the upper roller box Z-direction positioning structure 9 are arranged on the upper positioning support 9-1, one upper roller bearing 9-1 and one lower roller bearing 9-1 are respectively connected with the upper movable bracket 1-3 through bolts, the upper positioning bolts 6-3 are inserted from the middle of the two upper roller bearings 9-2, the centers of all upper working rollers 6-2 in the upper roller box 6 can be aligned with the center of the spline sleeve 4-1 on the intermediate coupling 4 in the height direction (Z direction) during roller changing, and the spline shaft at the driving end of the upper working roller 6-2 is conveniently inserted into the spline sleeve 4-1.

The lower roller bearings 10-2 in the lower roller box Z-direction positioning structure 10 are arranged on the lower positioning support 10-1, one lower roller bearing is arranged on the lower roller box Z-direction positioning support 10-1, the lower positioning bolts 7-3 are inserted from the middle of the two lower roller bearings 10-2, the lower positioning support 10-1 and the lower middle coupler bracket 2-2 are rigidly connected together through bolts, and the centers of all lower working rollers 7-2 in the lower roller box 7 and the centers of the spline sleeves 4-1 on the middle coupler 4 can be aligned in the height direction (Z direction) when the lower roller box Z-direction positioning structure is used for replacing rollers, so that the spline shafts at the driving ends of the lower working rollers 7-2 can be conveniently inserted into the spline sleeves 4-1.

Before starting roll changing operation, the lifting hydraulic cylinder 1-5 is retracted to the highest position, the upper limiting plate 1-2, the upper movable bracket 1-3 and the middle coupler 4 are driven to rise together through the connecting rod 1-6 and the upper guide rod 1-4, after the lifting is in place, the upper limiting plate 1-2 is positioned in the X direction and the Y direction by aligning the positioning taper sleeve 5-1 and the positioning taper pin 5-2 of the upper movable bracket anti-tilting structure 5, and accordingly the upper guide rod 1-4, the upper movable bracket 1-3 and the middle coupler 4 are positioned in the X direction and the Y direction.

Pulling out the old roll cassette:

The upper roller box 6 and the lower roller box 7 with the roller diameters worn in place are pulled out by using the roller changing trolley and the lower cross beam 3-2 in the frame and then lifted by a crane.

Pushing in a new roller box operation:

After the new roll box is accurately hoisted on a roll changing track and connected with a roll changing trolley, a main transmission device of the straightener is started and kept continuously rotating, then the new roll box is pushed into a rack 3 of the straightener by the roll changing trolley and horizontally moves on a lower cross beam 3-2 positioned in the rack 3, and in the process, the centers of all the upper working rolls 6-2 and the lower working rolls 7-2 are aligned with the centers of the spline sleeves 4-1 corresponding to the upper working rolls along the X direction by side guide lining plates 3-1 and lower roll box guide lining plates 7-4 at two sides in the rack 3. The upper roller box 6 and the lower roller box 7 are further pushed to move into the frame, and after the upper positioning bolt 6-3 and the lower positioning bolt 7-3 are respectively inserted into the upper roller bearings 9-2 and 10-2 and are in place, the centers of all the upper working rollers 6-2 and the lower working rollers 7-2 in the height direction (Z direction) are aligned with the center of the spline housing 4-1.

The roll changing trolley pushes the upper roll box 6 and the lower roll box 7 to move into the frame continuously, after spline shaft ends of all upper working rolls 6-2 and lower working rolls 7-2 start to contact with the spline housing 4-1, if gear teeth of the upper working rolls 6-2 and the lower working rolls 7-2 are not aligned on the circumference, namely, a phase difference exists, the spline housing 4-1 moves rightwards due to the fact that the spline shaft ends of the upper working rolls 6-2 and the lower working rolls 7-2 are subjected to pressure of the spline shaft ends (see fig. 3), the springs 4-2 are arranged on the intermediate coupling 4, the springs 4-2 are gradually compressed in the process of retreating the spline housing 4-1 rightwards, the spline shaft ends of the upper working rolls 6-2 and the lower working rolls 7-2 are tightly pressed together with the spline housing 4-1, during roll changing, the spline housing 4-1 keeps continuously rotating all the time, and after the spline housing 4-1 rotates to a certain angle, the shaft ends of the upper working rolls 6-2 and the lower working rolls 7-2 are just subjected to pressure of the spline housing 4-1 to the left (see fig. 3) and the spline shaft ends of the spline housing 4-1 are just subjected to pressure of the spline housing 4-1, and the spline shaft ends of the upper working rolls 6-2 and the spline housing 4-2 are just subjected to pressure of the spline housing 4-2-1 are just subjected to the left to pressure of the spline housing 4-1, and the spline housing 4-2 is subjected to pressure of the spline housing 4-1 is left. In the whole roll changing process, each working roll performs the same action, so that spline shafts at the shaft ends of all the upper working rolls 6-2 and the lower working rolls 7-2 are correctly sleeved into the spline sleeve 4-1 of the intermediate coupling 4, and the roll changing operation is completed.

According to the invention, the positioning structure for controlling the alignment of the center of the spline shaft 4-5 at the shaft end of the working roller and the spline sleeve 4-1 on the middle coupler 4 in the height direction (Z direction) is arranged on the straightener, the centers of the lower roller box 7 in the front-back direction (X direction, namely along the running direction of the steel plate) are aligned with the guide lining plates 7-4, the side guide lining plates 3-1 symmetrically arranged at the two sides in the rack, and the auxiliary alignment and spring pressing mechanism for the spline shaft gear teeth on the working roller and the spline sleeve gear teeth on the middle coupler 4 are arranged on the straightener, meanwhile, the speed difference that the working roller does not rotate and the middle coupler rotates is utilized, so that the working roller can be quickly and accurately sleeved into the middle coupler, the quick replacement of new and old roller boxes is realized, the time and labor are saved, the roll changing efficiency of the straightener is greatly improved, and the production running cost of enterprises is reduced.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.

Claims (10)

1. The roller straightening machine work roll changing bracket is characterized in that: comprises an upper roller box adjusting device and a lower roller box adjusting device which are positioned at the transmission side of the straightener and are arranged up and down;

The upper roller box adjusting device comprises an upper fixed bracket (1-1) connected with the straightener and an upper movable bracket (1-3) positioned below the upper fixed bracket (1-1), wherein middle couplings (4) matched with upper working rollers (6-2) of the straightener in number are arranged on the upper movable bracket (1-3), the upper movable bracket (1-3) is connected with a lifting device arranged on the upper fixed bracket (1-1) to realize adjustment of height positions, and butt joint with an upper roller box (6) is realized through upper roller box Z-direction positioning structures arranged at two ends of the upper movable bracket (1-3); the Z-direction positioning structure of the upper roller box comprises an upper positioning support (9-1) fixedly connected with the upper movable bracket (1-3), and the upper positioning support (9-1) is provided with an upper positioning bolt guide hole matched with an upper positioning bolt (6-3) arranged at the front end of the upper roller box (6);

The lower roller box adjusting device comprises a lower fixed bracket (2-1) and a lower movable bracket (2-2) arranged above the lower fixed bracket (2-1), wherein middle couplings (4) which are matched with lower working rollers (7-2) of the straightener in number are arranged on the lower movable bracket (2-2), the lower movable bracket (2-2) is connected with a height self-adaptive adjusting structure arranged on the lower fixed bracket (2-1) so as to realize self-adaptive adjustment of the height position, and the butt joint with the lower roller box (7) is realized through lower roller box Z-direction positioning structures arranged at two ends of the lower movable bracket (2-2); the Z-direction positioning structure of the lower roller box comprises a lower positioning support (10-1) fixedly connected with a lower movable bracket (2-2), and the lower positioning support (10-1) is provided with a lower positioning bolt guide hole matched with a lower positioning bolt (7-3) arranged at the front end of the lower roller box (7);

The middle coupling (4) comprises a spline housing (4-1), one end of the spline housing (4-1) can be matched with a spline shaft at the shaft end of a straightener working roll, the other end of the spline housing is connected with a spline shaft (4-5) matched with the spline shaft, the other end of the spline shaft (4-5) can be connected with a main transmission system of the straightener, a fixed ring (4-3) is arranged on the spline shaft (4-5), at least 2 pull rods (4-4) which are connected with the spline shaft in a sliding mode and are parallel to the spline shaft (4-5) are arranged on the fixed ring (4-3), the pull rods (4-4) are fixedly connected with the spline housing (4-1), a first elastic piece (4-2) is arranged between the fixed ring (4-3) and the spline housing (4-1), and the first elastic piece (4-2) is sleeved on the spline shaft (4-5).

2. The roll changing bracket of the work roll of the roll straightener as claimed in claim 1, wherein: the lifting device comprises an upper guide rod (1-4) which is arranged at two ends of an upper movable bracket (1-3) and is vertically arranged, the lower end of the upper guide rod (1-4) is in sliding connection with an upper movable bracket guide hole arranged on the upper movable bracket (1-3) and extends out of the upper movable bracket guide hole, a second elastic piece (1-7) and a first limit structure (1-9) positioned below the second elastic piece (1-7) are arranged at the extending end of the lower end so as to prevent the second elastic piece from falling out of the upper movable bracket guide hole, and the upper end of the upper guide rod (1-4) penetrates through an upper fixed bracket guide hole arranged on an upper fixed bracket (1-1) and is connected with a linear driving mechanism arranged on the upper fixed bracket (1-1); the second elastic piece (1-7) is a disc spring.

3. The roll changing bracket of the work roll of the roll straightener as claimed in claim 2, wherein: an upper limiting plate (1-2) fixedly connected with the two upper guide rods (1-4) is arranged between the upper fixed bracket (1-1) and the upper movable bracket (1-3) so as to limit the upper limit position of the upper guide rods (1-4).

4. A roll changing carriage for a work roll of a roll straightener as claimed in claim 3, characterized in that: an upper movable bracket anti-tilting structure (5) is arranged between the upper limiting plate (1-2) and the upper fixed bracket (1-1), the upper movable bracket anti-tilting structure (5) comprises two groups of taper pin taper sleeve positioning structures distributed on two sides of a connecting line of the two upper guide rods (1-4), and each taper pin taper sleeve positioning structure comprises a positioning taper pin (5-2) arranged on the upper movable bracket (1-3) and extending to the upper fixed bracket (1-1) and a positioning taper sleeve (5-1) arranged on the upper fixed bracket (1-1) and matched with the positioning taper pin (5-2).

5. The roll changing bracket for a work roll of a roll straightener as claimed in claim 4, wherein: the positioning taper sleeve (5-1) is detachably connected with the upper fixed bracket (1-1), and the positioning taper pin (5-2) is detachably connected with the upper movable bracket (1-3).

6. The roll changing bracket of the work roll of the roll straightener as claimed in claim 2, wherein: the linear driving mechanism is a hydraulic cylinder.

7. The roll changing bracket of the work roll of the roll straightener as claimed in claim 1, wherein: the height self-adaptive adjusting structure comprises lower guide rods (2-3) which are arranged at two ends of a lower movable bracket (2-2) and are vertically arranged, the upper ends of the lower guide rods (2-3) are slidably connected with lower movable bracket guide holes formed in the lower movable bracket (2-2) and extend out of the lower movable bracket guide holes, a second limiting structure is arranged at the extending end of the upper end of the lower guide rods to prevent the lower guide rods from falling out of the lower movable bracket guide holes, the lower ends of the lower guide rods (2-3) are fixedly connected with a lower fixed bracket (2-1) which is positioned below the lower movable bracket (2-2), second elastic pieces (2-4) are arranged between the lower fixed bracket (2-1) and the lower movable bracket (2-2), and the second elastic pieces (2-4) are disc springs.

8. The roll changing bracket of the work roll of the roll straightener as claimed in claim 1, wherein: the straightening machine also comprises an X-direction pre-positioning structure, wherein the X-direction pre-positioning structure comprises a convex side guide lining plate (3-1) which is arranged at the inner side of the straightening machine frame (3) and corresponds to the position of the lower roller box (7), and a guide lining plate (7-4) which is arranged on the lower roller box (7) and matched with the side guide lining plate (3-1).

9. The roll changing bracket of the work roll of the roll straightener as claimed in claim 1, wherein: the upper and lower sides of the upper positioning bolt guide hole are provided with upper roller bearings (9-2) protruding the upper positioning bolt guide hole to form rolling friction with the upper positioning bolt (6-3), and the upper and lower sides of the lower positioning bolt guide hole are provided with lower roller bearings (10-2) protruding the lower positioning bolt guide hole to form rolling friction with the lower positioning bolt (7-3).

10. The roll changing bracket of the work roll of the roll straightener as claimed in claim 1, wherein: the spline shaft (4-5) of the intermediate coupling (4) is connected with the spline housing of the ball tooth coupling (8), and the ball tooth coupling (8) is connected with the gear distribution box of the straightener.