Automatic roll changing system for working roll and first intermediate roll of 20-roll mill

Abstract

The invention belongs to the technical field of roll changing of single-stand multi-roll mills, and relates to an automatic roll changing system for a working roll and a first intermediate roll of a 20-roll mill, which comprises a roll system storage system, a special tool for changing the first intermediate roll, a special tool for changing the working roll, a lifting translation mechanism and a vehicle body platform, the roller system storage systems are arranged on the two sides of the front end of the vehicle body platform and used for storing a first middle roller and a working roller, the lifting translation mechanism is arranged in the middle of the vehicle body platform, and the first middle roller replacing special tool and the working roller replacing special tool are both installed in the lifting translation mechanism. The first intermediate roll replacing special tool and the working roll replacing special tool are used for clamping a set of first intermediate rolls and two working rolls in a rolling mill or a roll system storage system respectively, and the first intermediate roll replacing special tool and the working roll replacing special tool are arranged in a stacked mode. According to the automatic roll changing device, automatic roll changing of the first middle roll and the working roll of the 20-roll mill is achieved, meanwhile, the roll changing operation period is shortened, and therefore the production efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of roll changing of a single-stand multi-roller rolling mill, and relates to an automatic roll changing system for working rolls and a first intermediate roll of a 20-roller rolling mill. Background Art

[0002] The 20-roll mill is the core equipment of the ultra-thin plate production line, which is used to repeatedly roll plates of ordinary thickness to achieve the production of ultra-thin plates. The 20-roll mill is mainly composed of a frame, a roll system, a roll box, a press device, a drive device, etc. Among them, the roll system is a very important component, which is divided into two groups, upper and lower. Each group consists of 4 support rolls, 3 second intermediate rolls, 2 first intermediate rolls and 1 working roll, that is, a 20-roll mill has 4 groups of support rolls, 3 groups of second intermediate rolls, 2 groups of first intermediate rolls and 2 working rolls. The frame is a rectangular integral frame arch cast with high-quality steel, and the roll box is an upper and lower split roll box that slides with the arch window. The roll system of the 20-roll mill is very complex, with a large number of rolls, and there are also great differences in the structural dimensions of different types of rolls in the roll system, and the replacement frequency is very high.

[0003] Usually, the frequency of roll changing of the working roll and the first intermediate roll of a 20-roll mill is relatively high, especially for the working roll, which has a very high frequency of roll changing and a very tight requirement for the roll changing cycle. Therefore, how to realize the high-speed automatic roll changing of the working roll is also crucial. At present, the first intermediate roll of the 20-roll mill is changed by manually operating an ordinary roll changing car, and the working roll is changed by manual direct transportation; the roll changing tools are simple, the replacement efficiency is low, the labor intensity is high, and the safety is poor. At present, many companies are exploring the use of roll changing robots to realize the automatic replacement of the roll system, among which how to realize the automatic roll changing of the working roll and the first intermediate roll is one of the keys.

[0004] Therefore, it is very necessary to explore a safe and reliable automatic roll changing system for the working rolls and the first intermediate rolls in a 20-roll rolling mill, which can simultaneously meet the needs of automatic roll changing of the first intermediate roll and the working rolls of the 20-roll rolling mill, while reducing the roll changing operation cycle, thereby improving production efficiency and reducing labor intensity. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an automatic roll changing system for working rolls and first intermediate rolls of a 20-roll rolling mill, so as to realize automatic roll changing of working rolls and first intermediate rolls.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A 20-roller rolling mill working roll and first intermediate roll automatic roll changing system, comprising a roll system storage system, a first intermediate roll change special tool, a working roll change special tool, a lifting and translating mechanism and a car body platform, wherein the roll system storage system is arranged on both sides of the front end of the car body platform and is used to store the first intermediate roll and the working roll, the lifting and translating mechanism is arranged in the middle of the car body platform, the first intermediate roll change special tool and the working roll change special tool are both installed in the lifting and translating mechanism and are respectively used to clamp a group of first intermediate rolls and two working rolls in the rolling mill or in the roll system storage system, and the first intermediate roll change special tool and the working roll change are arranged in a stacked manner.

[0008] Further, the roll storage system comprises a first intermediate roll storage rack and a working roll storage rack, and the first intermediate roll storage rack and the working roll storage rack are respectively slidably arranged on both sides of the vehicle body platform through two automatic telescopic platforms, and are arranged in a staggered manner;

[0009] The automatic telescopic platform comprises a first telescopic platform, a second telescopic platform, a servo electric cylinder and a fixed platform, wherein the fixed platform is fixedly mounted on the vehicle body platform, the second telescopic platform is slidably mounted on the two end slots of the fixed platform, the first telescopic platform is slidably mounted on the two end slots of the second telescopic platform, the two ends of the servo electric cylinder are respectively hinged to the fixed platform and the first telescopic platform to drive the first telescopic platform and the second telescopic platform to slide along the width direction of the vehicle body platform, and the first intermediate roller storage rack and the working roller storage rack are respectively placed on the first telescopic platform of the two automatic telescopic platforms;

[0010] Pin waist-shaped long holes are provided on the upper and lower surfaces of the second telescopic platform, and limiting pins that cooperate with the pin waist-shaped long holes are provided on the lower surface of the first telescopic platform and the upper surface of the fixed platform to limit the travel of the first telescopic platform and the second telescopic platform.

[0011] Furthermore, a plurality of guide and positioning columns are provided on the first telescopic platform, and a plurality of supporting legs matching the guide and positioning columns are provided at the bottom of the first intermediate roll storage rack and the working roll storage rack.

[0012] Furthermore, the storage positions of the first intermediate roller storage rack are arranged in double layers, each storage position is provided with two storage V-shaped grooves, and the distance between the two storage V-shaped grooves is the installation center distance of the first intermediate roller, so as to facilitate the simultaneous clamping and storage of two first intermediate rollers.

[0013] Furthermore, the storage positions of the working roll storage rack are arranged in double layers, and each storage position is provided with a waist-shaped groove and a centering spring to meet the centering and storage requirements of the two working rolls, so that the two working rolls can be clamped and stored at the same time.

[0014] Furthermore, the working roll storage rack is arranged on the side of the vehicle body platform close to the opening of the rolling mill sealing door, and is located at one end close to the lifting and translation mechanism to reserve space for the opening of the rolling mill sealing door.

[0015] Furthermore, the lifting and translation mechanism comprises a first linear guide rail, a fixed frame, a servo lifting cylinder, a translation transmission mechanism, a lifting frame and a third linear guide rail, the fixed frame is slidably mounted on the vehicle body platform through the first linear guide rail, and the translation transmission mechanism is mounted on the fixed frame to drive the lifting and translation mechanism as a whole to move horizontally forward and backward on the vehicle body platform;

[0016] The lifting frame is vertically slidably installed in the fixed frame through a third linear guide rail, the servo lifting cylinder is fixedly installed on the fixed frame, and the output end is connected to the lifting frame to drive the lifting frame to slide vertically in the fixed frame, and the first intermediate roll changing special tool and the working roll changing special tool are both installed in the lifting frame.

[0017] Furthermore, the lifting and translation mechanism also includes a second linear guide rail, and the special tool for changing working rolls is slidably installed on the top of the lifting frame along the horizontal front-to-back direction through the second linear guide rail.

[0018] Furthermore, the special tool for changing working rolls includes a clamping and locking mechanism, a translation cylinder and a moving frame. The moving frame is slidably installed on the top of the lifting frame along the horizontal front and rear direction through a second linear guide rail. The clamping and locking mechanism is arranged in the moving frame and is used to simultaneously clamp two working rolls in the rolling mill or on the working roll storage rack. The translation cylinder is fixedly installed on the lifting frame, and the output end is connected to the moving frame so that the special tool for changing working rolls can move horizontally back and forth.

[0019] Furthermore, a transmission system is provided at the end of the vehicle body platform for driving the vehicle body platform to move forward and backward as a whole.

[0020] The beneficial effects of the present invention are:

[0021] The present invention provides an automatic roll changing system for working rolls and first intermediate rolls of a 20-roll rolling mill. The system reduces the roll storage operation time by adopting an integrated arrangement of roll changing tools and roll system storage, reduces the time loss caused by switching of roll changing tools by adopting a stacked arrangement of roll changing tools, reduces the positioning operation time of roll changing tools by adopting an automatic telescopic platform to automatically and accurately extend the roll storage position to the front of the special roll changing tool, increases the roll storage capacity by adopting a double-layer arrangement of storage positions, reduces the replacement frequency of the roll storage rack, and reduces the roll changing operation cycle while realizing automatic roll changing of the first intermediate roll and working roll of the 20-roll rolling mill, thereby improving production efficiency and reducing labor intensity.

[0022] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 It is a structural schematic diagram of an automatic roll changing system for working rolls and first intermediate rolls of a 20-roll rolling mill in the present invention;

[0025] Figure 2 for Figure 1 Left view of

[0026] Figure 3 It is a structural schematic diagram of the roller storage system in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the first intermediate roller storage rack in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the working roll storage rack in the present invention;

[0029] Figure 6 It is a structural schematic diagram of the automatic telescopic platform in the present invention;

[0030] Figure 7 It is a structural schematic diagram of the lifting and translation mechanism in the present invention;

[0031] Figure 8 It is a structural schematic diagram of the first intermediate roll changing special tool in the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the special tool for changing working rolls in the present invention.

[0033] Reference numerals: 1-roller storage system, 2-special tool for changing the first intermediate roll, 3-special tool for changing the working roll, 4-lifting and translation mechanism, 5-car body platform;

[0034] 1-Roller storage system: 11-First intermediate roller storage rack, 12-Automatic telescopic platform, 13-Working roller storage rack, 14-Outrigger;

[0035] 2-Special tools for changing the first intermediate roll: 21-cage, 22-reset spring assembly, 23-V-shaped wedge, 24-locking cylinder, 205-wedge;

[0036] 3-Special tools for working roll changing: 31-clamping and locking mechanism, 32-translation cylinder, 33-moving frame;

[0037] 4-lifting and translation mechanism: 41-first linear guide rail, 42-fixed frame, 43-servo lifting cylinder, 44-translation transmission mechanism, 45-lifting frame, 46-second linear guide rail, 47-third linear guide rail;

[0038] 12-automatic telescopic platform: 121-first telescopic platform, 122-second telescopic platform, 123-servo electric cylinder, 124-limit pin shaft, 125-fixed platform, 126-guide positioning column, 127-slide plate, 128-pin shaft waist-shaped long hole. DETAILED DESCRIPTION

[0039] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0040] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0041] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] See also Figures 1 to 9It is an automatic roll changing system for working rolls and first intermediate rolls of a 20-roll rolling mill, comprising a roll storage system 1, a special tool for changing the first intermediate roll 2, a special tool for changing the working roll 3, a lifting and translation mechanism 4, and a car body platform 5, etc., and adopts a stacked arrangement of the roll changing tools, and the roll changing tools and the roll storage system are arranged as an integrated whole, so that the working rolls and the first intermediate rolls can be efficiently and automatically replaced.

[0043] Key References Figure 3 to Figure 6 The roll storage system 1 is installed as a whole on the car body platform 5, including a first intermediate roll storage rack 11, an automatic telescopic platform 12 and a working roll storage rack 13, etc., which are used to store new rolls and replaced old rolls. The working rolls are shorter in length, and the working roll storage rack 13 is arranged on the side of the rolling mill door, so as to provide space for the opening and closing of the rolling mill sealing door; the first intermediate roll storage rack 11 is arranged on the side without the door; at the same time, since the replacement frequency of the first intermediate roll is low, only the working roll storage rack 13 can be arranged at ordinary times, and the first intermediate roll storage rack 11 can be arranged when the first intermediate roll needs to be replaced.

[0044] The storage positions of the first intermediate roller storage rack 11 are arranged in double layers, the upper layer is used to store replaced old rollers, and the lower layer is used to store new rollers; each storage position is provided with two V-shaped storage grooves, and the distance between the two grooves is the installation center distance of the first intermediate roller, so that two first intermediate rollers can be clamped and stored at the same time, and four legs 14 are provided at the bottom of the intermediate roller storage rack 11, and the four legs are arranged according to the position of the guide positioning column 126 on the automatic telescopic platform 12, so as to facilitate the first intermediate roller storage rack 11 to be hoisted as a whole onto the automatic telescopic platform 12.

[0045] The automatic telescopic platform 12 is provided with two parts, which are respectively installed on both sides of the vehicle body platform 5, and are used to carry the first intermediate roll storage rack 11 and the working roll storage rack 13 respectively, and automatically and accurately telescope the corresponding roll storage position to the front of the corresponding roll changing special tool, which includes a first telescopic stand 121, a second telescopic stand 122, a servo electric cylinder 123, a limit pin 124, a fixed stand 1225, a guide positioning column 126 and a slide plate 127, etc.;

[0046] The upper surface of the first telescopic platform 121 is provided with four guide positioning columns 126 and a hinge shaft mounting bracket for connecting the front end of the servo electric cylinder, and a limit pin 124 is provided in the middle, and the limit pin 124 cooperates with the pin waist-shaped long hole 128 (arranged along the telescopic direction of the servo electric cylinder 123) on the second telescopic platform 122 to limit the stroke of the first telescopic platform 121, so that the first telescopic platform 121 moves forward and backward under the push of the servo electric cylinder 123;

[0047] Preferably, the first telescopic platform 121 is slidably installed in the card slots at both ends of the second telescopic platform 122, and slide plates 127 are provided on the lower surface, the upper surfaces at both ends and the end surfaces of both sides of the first telescopic platform 121, so that the first telescopic platform 121 can slide in the card slots of the second telescopic platform 122.

[0048] The second telescopic platform 122 is slidably installed in the card slots at both ends of the fixed platform 125, and slide plates 127 are provided on the lower surface, the upper surfaces at both ends and the end surfaces of both sides of the second telescopic platform 122, so that the second telescopic platform 122 can slide in the card slots of the fixed platform 125, and the middle parts of the upper and lower surfaces of the second telescopic platform 122 are provided with pin waist-shaped long holes 128 to cooperate with the limiting pins 124 on the first telescopic platform 121 and the fixed platform 125 respectively, so as to limit the stroke of the second telescopic platform 122, and move back and forth under the drag of the first telescopic platform 121.

[0049] The fixed stand 125 is fixed to the vehicle body platform 5 by bolts, and a slide plate 127 is provided in the slots at both ends thereof; a limit pin 124 is provided in the middle, and cooperates with the pin waist-shaped long hole 128 on the second telescopic stand 122 to limit the stroke of the second telescopic stand 122, and an articulated shaft mounting bracket for connecting the rear end of the servo electric cylinder is provided at the tail thereof.

[0050] The storage positions of the working roll storage rack 13 are arranged in double layers, so that more rolls can be stored; each storage position is provided with a waist groove and a centering spring to meet the centering and storage of two working rolls, so as to facilitate the simultaneous clamping and storage of two rolls; the working roll storage rack 13 has the same number and structure of legs as the first intermediate roll storage rack 11, and the working roll storage rack 13 can be hoisted as a whole onto the automatic telescopic platform 12. When the working roll storage rack 13 is full of old rolls, the old rolls are hoisted down together with the working roll storage rack 13 as a whole, and replaced with a working roll storage rack 13 full of new rolls.

[0051] Key References Figure 8 and Fig. 9 The first intermediate roll changing tool 2 is installed in the lifting frame 45 of the lifting and translation mechanism 4, and includes a retaining frame 21, a reset spring group 22, a V-shaped bevel 23, a locking cylinder 24, and a bevel 25, etc.; it is used to simultaneously clamp the two first intermediate rolls in the rolling mill or on the first intermediate roll storage rack 11. The bevel 25 is two pieces, both of which are installed in the retaining frame 21 and are arranged symmetrically in the upper and lower parts. Each bevel 25 is composed of an outer bevel and an inner bevel to adapt to the synchronous clamping of two rolls with a fixed center distance; reset spring groups 22 are provided at both ends to expand the bevel 25 when the roll is released. Its specific structure can refer to the roll changing device in the Chinese patent application with publication number CN117282775A, and this application will not repeat it.

[0052] The working roll changing special tool 3 is installed on the lifting frame 45 of the lifting and translating mechanism 4 through the second linear guide rail 46, and is located directly above the first intermediate roll changing special tool 2, which includes a clamping and locking mechanism 31, a translation cylinder 32, and a moving frame 33. Among them, the clamping and locking mechanism 31 is used to clamp two working rolls in the rolling mill or on the working roll storage rack 13 at the same time, and the translation cylinder 32 is used to drive the clamping and locking mechanism 31 to move forward when the working roll is changed to complete the working roll changing operation, and to drive the clamping and locking mechanism 31 to move backward when the first intermediate roll is changed to avoid motion interference with the rolling mill or the storage rack when the first intermediate roll is changed. Its specific structure can refer to the working roll changing device in the Chinese patent application with publication number CN118477893A, and this application will not repeat it.

[0053] Key References Figure 7 The lifting and translation mechanism 4 is slidably installed on the car body platform 5 through the first linear guide rail 41, and includes the first linear guide rail 41, the fixed frame 42, the servo lifting cylinder 43, the translation transmission mechanism 44, the lifting frame 45, the second linear guide rail 46 and the third linear guide rail 47, etc., which are used to drive the lifting and translation of the first intermediate roll changing special tool and the working roll changing special tool to complete the roll changing operation.

[0054] The translation transmission mechanism 44 is used to drive the lifting and translation mechanism 4 together with the roller changing tool installed thereon to move forward and backward as a whole, and to accurately position it. It is composed of a servo motor, gears and racks, etc. The servo motor and gears are integrally installed on the fixed frame 42, and the rack is installed on the vehicle body platform 5, so that the lifting and translation mechanism 4 together with the roller changing tool installed thereon are driven to move forward and backward on the vehicle body platform 5 through the meshing of the gears and the racks, and the servo motor drives the gears.

[0055] The lifting frame 45 is vertically slidably installed in the fixed frame 42 through a third linear guide rail 47, the servo lifting cylinder 43 is fixedly installed on the fixed frame 42, and the output end is connected to the lifting frame 45 to drive the lifting frame 45 to slide vertically in the fixed frame 42; the translation cylinder 32 is fixedly installed on the lifting frame 45, and the output end is connected to the moving frame 33, the moving frame 33 is installed on the lifting frame 45 through a second linear guide rail 46, and the clamping and locking mechanism 31 is arranged in the moving frame 33, so that the translation cylinder 32 can drive the clamping and locking mechanism 31 to move horizontally forward and backward.

[0056] The car body platform 5 is used to provide support for the entire system, and installation positions for the automatic retracting platform 12 are staggered on both sides of its front end. On the side of the rolling mill door opening, the installation position of the automatic retracting platform 12 is arranged backward to provide space for the opening and closing of the rolling mill sealing door. The middle part is provided with an installation position for the lifting and translation mechanism 4, and the end is provided with a transmission system for driving the car body platform 5 to move forward and backward as a whole.

[0057] How it works

[0058] Preparation stage: after receiving the roll changing task, the vehicle body platform 5 moves from the waiting position to the preparation position as a whole; then the servo lifting cylinder 43 adjusts the roll changing tools (the first intermediate roll changing special tool 2 and the working roll changing special tool 3) to the roll changing position; (if it is the first intermediate roll changing, the working roll changing special tool 3 is first moved to the rear by the translation cylinder 32 to avoid interference; if the working roll is changing, the working roll changing special tool 3 is moved to the front) and then the translation transmission mechanism 44 drives the lifting and translation mechanism 4 to move forward as a whole to the working position (this stage does not occupy production time);

[0059] Take the first intermediate roll change as an example:

[0060] Roller changing stage: after the sealing door of the rolling mill is opened, the vehicle body platform 5 moves from the preparation position to the working position as a whole; then the first intermediate roll changing special tool 2 simultaneously clamps a group of first intermediate rolls in the rolling mill; then the translation transmission mechanism 44 drives the lifting and translation mechanism 4 to move backward as a whole to the roller storage position;

[0061] Then, the servo electric cylinder 123 in the automatic telescopic platform 12 on which the first intermediate roller storage rack 11 is installed drives the first telescopic stand 121 and the second telescopic stand 122 to move, and the first intermediate roller storage rack 11 is moved to a predetermined position. Then, the servo lifting cylinder 43 lowers the lifting frame 45, so that the first intermediate roller replacement special tool 2 places the roller in the storage position of the first intermediate roller storage rack, and then releases the first intermediate roller.

[0062] Then the servo electric cylinder 123 continues to drive the telescopic platform to continue to move, and / or the servo lifting cylinder 43 raises or lowers the lifting frame 45 to move the new roll to the front of the first intermediate roll changing tool 2;

[0063] Then the first intermediate roller changing special tool clamps the new roller and lifts the lifting frame 45 through the servo lifting cylinder 43, thereby bringing the new roller out of the storage position, and then the telescopic platform is reset; then the translation transmission mechanism 44 drives the lifting and translation mechanism 4 to move forward as a whole, and puts the new roller into the roller installation position; then the first intermediate roller changing special tool 2 releases the roller to complete the roller installation; then the translation transmission mechanism is reset to complete the roller changing operation.

[0064] Reset stage: When the translation transmission mechanism 44 is reset, the vehicle body platform 5 is also reset to the waiting position, and the roller changing tool is reset. If the storage rack is full of old rollers, the roller storage rack is hoisted out as a whole, and the storage rack for new rollers is hoisted onto the automatic telescopic platform. (This stage does not occupy production time)

[0065] The working principle of the working roll changing is the same as above, the difference is that the special tool 3 for working roll changing is used to change the rolls, and the old rolls and new rolls are stored in the working roll storage rack 13.

[0066] The system reduces the roll storage operation time by adopting an integrated arrangement of the roll changing tool and the roll storage system, and adopts a stacked arrangement of the roll changing tools to reduce the time loss caused by the switching of the roll changing tools. The system adopts an automatic telescopic platform to automatically and accurately move the roll storage position to the front of the special roll changing tool to reduce the positioning operation time of the roll changing tool. The system adopts a double-layer storage position structure to increase the roll storage capacity of the roll storage system and reduce the replacement frequency of the storage rack. Ultimately, the system realizes automatic roll changing of the first intermediate roll and working roll of the 20-roll mill and reduces the roll changing operation cycle, thereby improving production efficiency and reducing labor intensity.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A 20-roller mill working roll and first intermediate roll automatic roll changing system, characterized in that: It includes a roll storage system, a special tool for changing the first intermediate roll, a special tool for changing the working roll, a lifting and translating mechanism and a car body platform. The roll storage system is arranged on both sides of the front end of the car body platform and is used to store the first intermediate roll and the working roll. The lifting and translating mechanism is arranged in the middle of the car body platform. The special tool for changing the first intermediate roll and the special tool for changing the working roll are both installed in the lifting and translating mechanism and are respectively used to clamp a group of first intermediate rolls and two working rolls in the rolling mill or the roll storage system, and the first special tool for changing the intermediate roll and the working roll are arranged in a stacked manner.

2. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 1, characterized in that: The roll storage system includes a first intermediate roll storage rack and a working roll storage rack, and the first intermediate roll storage rack and the working roll storage rack are respectively slidably arranged on both sides of the vehicle body platform through two automatic telescopic platforms, and are arranged in a staggered manner; The automatic telescopic platform comprises a first telescopic platform, a second telescopic platform, a servo electric cylinder and a fixed platform, wherein the fixed platform is fixedly mounted on the vehicle body platform, the second telescopic platform is slidably mounted on the two end slots of the fixed platform, the first telescopic platform is slidably mounted on the two end slots of the second telescopic platform, the two ends of the servo electric cylinder are respectively hinged to the fixed platform and the first telescopic platform to drive the first telescopic platform and the second telescopic platform to slide along the width direction of the vehicle body platform, and the first intermediate roller storage rack and the working roller storage rack are respectively placed on the first telescopic platform of the two automatic telescopic platforms; Pin waist-shaped long holes are provided on the upper and lower surfaces of the second telescopic platform, and limiting pins that cooperate with the pin waist-shaped long holes are provided on the lower surface of the first telescopic platform and the upper surface of the fixed platform to limit the travel of the first telescopic platform and the second telescopic platform.

3. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 2, characterized in that: A plurality of guide and positioning columns are arranged on the first telescopic platform, and a plurality of supporting legs matching the guide and positioning columns are arranged at the bottom of the first intermediate roll storage rack and the working roll storage rack.

4. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 2, characterized in that: The storage positions of the first intermediate roller storage rack are arranged in double layers, and each storage position is provided with two storage V-shaped grooves. The distance between the two storage V-shaped grooves is the installation center distance of the first intermediate roller, so that two first intermediate rollers can be clamped and stored at the same time.

5. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 2, characterized in that: The storage positions of the working roll storage rack are arranged in double layers, and each storage position is provided with a waist-shaped groove and a centering spring to meet the needs of centering and storing two working rolls, so that the two working rolls can be clamped and stored at the same time.

6. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 2, characterized in that: The working roll storage rack is arranged on the side of the vehicle body platform close to the opening of the rolling mill sealing door, and is located at one end close to the lifting and translation mechanism to reserve space for the opening of the rolling mill sealing door.

7. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 1, characterized in that: The lifting and translation mechanism comprises a first linear guide, a fixed frame, a servo lifting cylinder, a translation transmission mechanism, a lifting frame and a third linear guide. The fixed frame is slidably mounted on the vehicle body platform through the first linear guide. The translation transmission mechanism is mounted on the fixed frame and is used to drive the lifting and translation mechanism as a whole to move horizontally forward and backward on the vehicle body platform. The lifting frame is vertically slidably installed in the fixed frame through a third linear guide rail, the servo lifting cylinder is fixedly installed on the fixed frame, and the output end is connected to the lifting frame to drive the lifting frame to slide vertically in the fixed frame, and the first intermediate roll changing special tool and the working roll changing special tool are both installed in the lifting frame.

8. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 6, characterized in that: The lifting and translation mechanism further includes a second linear guide rail, and the working roll changing special tool is slidably installed on the top of the lifting frame along the horizontal front-rear direction through the second linear guide rail.

9. The automatic roll changing system for working rolls and first intermediate rolls of a 20-roll mill according to claim 7, characterized in that: The special tool for changing working rolls includes a clamping and locking mechanism, a translation cylinder and a moving frame. The moving frame is slidably installed on the top of the lifting frame along the horizontal front-to-back direction through a second linear guide rail. The clamping and locking mechanism is arranged in the moving frame and is used to simultaneously clamp two working rolls in the rolling mill or on the working roll storage rack. The translation cylinder is fixedly installed on the lifting frame, and the output end is connected to the moving frame, so that the special tool for changing working rolls can move horizontally back and forth.

10. The automatic roll changing system for working rolls and first intermediate rolls of a 20-high rolling mill according to claim 1, characterized in that: A transmission system is provided at the end of the vehicle body platform for driving the vehicle body platform to move forward and backward as a whole.

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