Device for repairing worn roller

Abstract

The invention relates to the technical field of roller machining, in particular to a roller after-abrasion repairing device which comprises a machine tool, a rotating motor, a driving clamp and a driven clamp. A protective half cylinder; an upper protective cylinder and a lower protective cylinder; and the automatic switching and repairing device is arranged on the side, close to the protective half cylinder, of the machine tool. By means of the automatic switching repairing device, the multiple maintenance machine bases distributed in a circular array mode are arranged for automatic switching, so that the effect of conducting multiple maintenance on the roller is achieved, multiple maintenance work can be completed without carrying the roller through multiple machine tools, the working efficiency in the roller maintenance period is further improved, and the maintenance cost is reduced. The protective cylinder, the lower protective cylinder and the protective half cylinder are combined to form a complete cylinder shape, so that the effect of sealing and protecting a roller clamped between the driving clamp and the driven clamp is achieved, and the problem that chippings or water spots splash in the repairing work period such as polishing or cleaning of the roller is solved.

Description

Technical Field

[0001] The invention relates to the technical field of roller processing, in particular to a device for repairing a worn roller. Background Art

[0002] Rollers are key tools in steel rolling production and must be able to withstand strong forces and heat. In addition to good fracture resistance, the surface should also have good wear resistance and heat resistance, not only because the cost of the rolls is closely related to the product, but also directly determines the quality of hot-rolled products and the production rate of the rolling mill. Therefore, the research on improving the wear resistance of the hot-rolled roll surface has attracted attention at home and abroad. The materials of hot-rolled rolls have been continuously improved and developed, from the early ordinary chilled cast iron, infinite chilled alloy cast iron, high chromium cast iron, high chromium cast steel, to the high-speed steel and cemented carbide widely used abroad at present, which is roughly the development process of hot-rolled rolls. Roll failure only occurs on the wear surface of the roll. Therefore, the surfacing strengthening technology for the hot-rolled roll surface can not only greatly increase the service life of the hot-rolled roll, improve the mill operation rate, and save a lot of roll steel, but also the repair of the failed roll can realize the regeneration of the waste roll and reduce the roll consumption. It is one of the effective measures to improve production efficiency, implement production increase and savings, and reduce consumption in steel rolling production. At present, the strengthening technology used for the surfacing surface of hot-rolled rolls has become a focus of attention for surfacing repair operators at home and abroad.

[0003] The general means of repairing the roll after wear are surfacing repair, thermal spray repair, surface quenching, and machining. The roll needs to be repaired accordingly according to different wear conditions, but the existing roll repair machine can only simply clamp and rotate the roll for repair. The operator needs to select the corresponding repair machine to work on the roll. Some rolls are severely worn and need to be repaired in sequence by multiple machines, with initial turning, fine grinding, and then surfacing repair. The multi-means repair work requires the roll to be moved on different repair machines, or the repair machine needs to be replaced manually, which affects the overall roll repair efficiency; At the same time, during the repair of the rolling mill roll, in order to ensure the normal installation and disassembly of the rolling mill roll and the fixture on the machine tool, an exposed repair method is adopted. The rolling mill roll is in an exposed state as a whole. During the turning or grinding of the rolling mill roll surface, a large amount of debris will be splashed, and then there will be a problem of debris getting stuck in the machine tool and affecting the operation of the machine. In view of this, we propose a device for repairing worn rolling mill rolls. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a device for repairing a worn roller, which solves the problems raised in the above background technology. To achieve the above purpose, the present invention is implemented through the following technical solutions: a device for repairing a worn roller, comprising a machine tool, a rotating motor is installed on one side of the machine tool, an active clamp is clamped on the output shaft of the rotating motor, and a passive clamp is rotatably connected on the other side of the machine tool, and the positions of the active clamp and the passive clamp correspond to each other, and are used to clamp the roller; a blast chamber, both ends of the blast chamber are fixedly installed inside the machine tool, and a protective half-cylinder is fixedly connected to the surface of the blast chamber, and a snap-in groove is provided on the protective half-cylinder; an upper protective cylinder and a lower protective cylinder, both ends of the upper protective cylinder and the lower protective cylinder are rotatably connected inside the machine tool, and the upper protective cylinder and the lower protective cylinder are symmetrically distributed with the central axis of the active clamp to the symmetry axis; an automatic switching repair device, which is arranged on the side of the machine tool close to the protective half-cylinder.

[0005] Preferably, the automatic switching repair device includes an extended base, which is fixedly mounted on a machine tool, an automatic control device is provided on the extended base, a mobile base is slidably connected to the extended base, a multi-station coupling is internally rotatably connected to the mobile base, and a switching gear is fixedly connected to the end of the multi-station coupling.

[0006] Preferably, a plurality of station bases are distributed in a circular array on the multi-station coupling, and the plurality of station bases are respectively equipped with a turning machine base, a grinding machine base, a cleaning machine base, a spraying machine base, and a surfacing machine base.

[0007] Preferably, the automatic control device includes an electric push rod and a trigger base fixedly mounted on the extended base, the end of the electric push rod is fixedly mounted on the extended base, the output shaft of the electric push rod is clamped with a synchronous push plate, both ends of the synchronous push plate are fixedly connected with a left push tooth plate, the side of the left push tooth plate away from the synchronous push plate is fixedly connected with a one-way drive tooth plate, the side of the one-way drive tooth plate away from the synchronous push plate is fixedly connected with a right push plate, and the side of the right push plate close to the one-way drive tooth plate is elastically connected with a movable lever through a spring.

[0008] Preferably, the synchronous push plate slides on the extended base, the movable lever slides on the right push plate, the top of the movable lever is provided with an inclined surface, and the top of the right push plate slides on the inner wall of the top of the trigger base.

[0009] Preferably, a left hanging ear and a right hanging ear are respectively provided on both sides of the mobile base, and a groove for inserting the left push tooth plate is opened inside the left hanging ear.

[0010] Preferably, the one-way drive tooth plate includes a tooth stem, the two ends of the tooth stem are respectively fixedly connected to the left push tooth plate and the right push plate, a plurality of limit slots are provided inside the tooth stem, the interior of the plurality of limit slots are elastically connected with limit teeth through torsion springs, a protrusion is provided at the bottom of the limit teeth for limiting the limit slots, and the limit teeth are used for one-way meshing to drive the switching gear to rotate.

[0011] Preferably, the automatic control device also includes a driving connecting rod, one end of which is fixedly connected to the right push plate, the other end of which is fixedly connected to an inclined guide seat, the interior of the inclined guide seat is slidably connected to a sliding shaft, and the end of the sliding shaft is fixedly connected to a double-headed gear rod.

[0012] Preferably, the ends of the upper protective tube and the lower protective tube are fixedly connected with passive gears, and the two passive gears are respectively engaged with the teeth at both ends of the double-headed gear rod, and the surface of the driving connecting rod slides inside the extended base and the machine tool respectively, and the double-headed gear rod slides inside the machine tool.

[0013] Preferably, one end of the passive clamp passes through the interior of the machine tool and is fixedly connected to a large transmission wheel, the surface of the large transmission wheel is connected to a small transmission wheel through a transmission belt, the interior of the small transmission wheel is fixedly connected to a fan, the fan is located inside the blast chamber and rotates, and the end of the small transmission wheel is rotatably connected to the machine tool.

[0014] It can be seen from the above technical solutions that the roller wear repair device provided in the embodiments of this specification has at least the following beneficial effects: (1) The present invention uses an automatic switching repair device to set up multiple maintenance machine stands distributed in a circular array for automatic switching, thereby achieving the effect of performing multiple maintenance on the roller. Multiple maintenance tasks can be completed without the roller being transported by multiple machine tools, further improving the work efficiency during roller maintenance. The protective cylinder, the lower protective cylinder and the protective half cylinder are combined to form a complete cylindrical shape, thereby achieving the effect of sealing and protecting the roller clamped between the active clamp and the passive clamp, preventing the roller from being damaged by debris or water splashing during repair work such as grinding or cleaning.

[0015] (2) The present invention arranges a plurality of workstation bases in a circular array distributed on a multi-workstation coupling shaft, and utilizes a power structure to realize automatic switching of a plurality of maintenance stands, thereby achieving the effect of performing multiple maintenance on the rolling mill rolls. The plurality of workstation bases are driven by an automatic control device to first move away from the rolling mill rolls, and then perform rotation switching, and then move closer to the rolling mill rolls for alignment maintenance after switching, thereby further avoiding the problem of motion interference between the plurality of workstation bases and the rolling mill rolls during rotation switching.

[0016] (3) The present invention realizes the effect of automatic state switching by combining or opening the upper and lower protective cylinders through the meshing of the passive gear and the double-headed gear rod in combination with the movement of the right push plate. When the work station base is close to the roller for repair, the upper and lower protective cylinders are in a combined protective state. When the work station base is away from the roller, the upper and lower protective cylinders are in an open state. This makes it easy for the upper and lower protective cylinders to open automatically after the roller is repaired, so as to facilitate the unloading of the roller for replacement and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the automatic switching repair device in the present invention; Figure 3 It is a structural schematic diagram of the automatic control device in the present invention; Figure 4 It is a structural schematic diagram of the mobile base in the present invention; Figure 5 It is a structural schematic diagram of the one-way driving tooth plate in the present invention; Figure 6 It is a schematic diagram of the structure of the activity center in the present invention; Figure 7 It is a schematic diagram of the structure of the one-way driving tooth plate in the present invention; Figure 8 It is a left view of the machine tool in the present invention; Fig. 9 It is a schematic diagram of the left side structure of the limit slot in the present invention; Fig.10 It is a structural schematic diagram of the large transmission wheel in the present invention; Fig.11 It is a schematic diagram of the structure of the inclined guide seat in the present invention; Fig.12 It is a schematic diagram of the structure of the upper protective tube and the lower protective tube in the present invention; Fig.13 It is a schematic diagram of the structure of the fan in the present invention.

[0018] In the figure: 1, machine tool; 2, rotating motor; 3, active fixture; 4, passive fixture; 41, large transmission wheel; 42, small transmission wheel; 43, fan; 5, blast chamber; 6, protective half cylinder; 61, snap-in slot; 7, upper protective cylinder; 8, lower protective cylinder; 9, automatic switching repair device; 91, extended base; 92, automatic control device; 921, electric push rod; 922, synchronous push plate; 923, left push tooth plate; 924, single Driving tooth plate; 9241, tooth stem; 9242, limit slot; 9243, limit tooth; 925, right push plate; 926, movable lever; 927, trigger base; 93, mobile base; 931, left hanging ear; 932, right hanging ear; 94, multi-station coupling; 95, switching gear; 96, station base; 10, driving connecting rod; 11, tilting guide seat; 12, sliding shaft; 13, double-headed tooth rod; 14, passive gear. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 - Fig.13 As shown, a device for repairing worn rollers includes a machine tool 1 and an automatic switching repair device 9, which is arranged on the machine tool 1. Through the automatic switching repair device 9, a plurality of maintenance stands distributed in a circular array are arranged for automatic switching, thereby achieving the effect of performing multiple repairs on the rollers and improving the work efficiency during roller maintenance. A rotating motor 2 is installed on one side of the machine tool 1, and an active clamp 3 is clamped on the output shaft of the rotating motor 2. A passive clamp 4 is rotatably connected to the other side of the machine tool 1. The positions of the active clamp 3 and the passive clamp 4 correspond to each other and are used to clamp the rollers; a blast chamber 5, both ends of which are fixedly installed inside the machine tool 1, and a protective half-cylinder 6 is fixedly connected to the surface of the blast chamber 5, and a snap-in groove 61 is provided on the protective half-cylinder 6. ; an upper protective tube 7, and a lower protective tube 8, both ends of the upper protective tube 7 and the lower protective tube 8 are rotatably connected to the inside of the machine tool 1, and the upper protective tube 7 and the lower protective tube 8 are symmetrically distributed with the central axis of the active fixture 3 about the symmetry axis, and the upper protective tube 7 and the lower protective tube 8 are each composed of a shaft rod, a connecting plate and a quarter-circular arc plate. The connecting plate is used to fix the shaft rod and the quarter-circular arc plate, and the shaft rod serves as a support point for the quarter-circular arc plate to rotate on the machine tool 1. When the upper protective tube 7 and the lower protective tube 8 are in a combined state, the upper protective tube 7, the lower protective tube 8 and the protective half tube 6 are combined to form a complete cylindrical shape (such as Fig.12As shown), the roller clamped between the active clamp 3 and the passive clamp 4 is closed and protected to prevent the roller from being splashed with debris or water stains during the repair work such as grinding or cleaning. At the same time, when the upper protective cylinder 7, the lower protective cylinder 8 and the protective half cylinder 6 are in a combined state, a rectangular groove is provided in the area where the upper protective cylinder 7 contacts the top of the protective half cylinder 6 for communicating with the blast chamber 5, and a rectangular groove is provided in the area where the lower protective cylinder 8 contacts the bottom of the protective half cylinder 6. When the upper protective cylinder 7, the lower protective cylinder 8 and the protective half cylinder 6 are in a combined state, the rectangular groove at the bottom of the protective half cylinder 6 can realize the discharge of debris or cleaning water, and the card-in groove 61 is used to ensure the insertion of the repair machine tool 1 in the automatic switching repair device 9, thereby achieving the effect of closed repair of the roller.

[0021] In this embodiment, the automatic switching repair device 9 includes an extended base 91, which is fixedly installed on the machine tool 1. An automatic control device 92 is arranged on the extended base 91. A mobile base 93 is slidably connected to the extended base 91. The internal rotation of the mobile base 93 is connected to a multi-station coupling 94. The end of the multi-station coupling 94 is fixedly connected to a switching gear 95. A plurality of station bases 96 are distributed in a circular array on the multi-station coupling 94. A repair machine base is installed on each of the plurality of station bases 96. The repair machine base is respectively equipped with a turning machine base, a grinding machine base, a cleaning machine base, a spraying machine base and a surfacing machine base. After the rollers are turned and ground in turn, cleaning work needs to be performed to ensure that there is no debris adhering to the surface of the rollers, and at the same time to ensure that the surface is cleaned to facilitate subsequent surfacing repair. By arranging a plurality of workstation bases 96 distributed in a circular array on the multi-station coupling 94 and utilizing a power structure to realize automatic switching of a plurality of maintenance stands, it is possible to perform multiple maintenance operations on the rolling mill rolls. Multiple maintenance tasks can be completed without the need for the rolling mill rolls to be transported by multiple machine tools 1, thereby further improving the work efficiency during the maintenance of the rolling mill rolls. The automatic control device 92 is used to drive the plurality of workstation bases 96 to first move away from the rolling mill rolls, and then perform rotation switching, and then move closer to the rolling mill rolls for alignment maintenance after the switching, thereby further avoiding the problem of motion interference between the plurality of workstation bases 96 and the rolling mill rolls during the rotation switching.

[0022] Furthermore, the automatic control device 92 includes an electric push rod 921 and a trigger base 927 fixedly mounted on the extended base 91. The end of the electric push rod 921 is fixedly mounted on the extended base 91. The output shaft of the electric push rod 921 is clamped with a synchronous push plate 922. The synchronous push plate 922 slides on the extended base 91. Both ends of the synchronous push plate 922 are fixedly connected with a left push tooth plate 923. The side of the left push tooth plate 923 away from the synchronous push plate 922 is fixedly connected with a one-way drive tooth plate 924. The side of the one-way drive tooth plate 924 away from the synchronous push plate 922 is fixedly connected with a right push plate 925. The side of the right push plate 925 close to the one-way drive tooth plate 924 is elastically connected with a movable tooth plate 924 through a spring. 6. The movable shackle 926 slides up and down on the right push plate 925. The top of the movable shackle 926 is provided with an inclined surface, and the top of the right push plate 925 slides on the inner wall of the top of the trigger base 927. The two sides of the movable base 93 are respectively provided with protruding left hanging ears 931 and right hanging ears 932. The interior of the left hanging ear 931 is provided with a groove for the left push tooth plate 923 to be inserted. When the left push tooth plate 923 moves toward the machine tool 1, the multi-station coupling 94 on the movable base 93 can be driven to move as a whole through the left hanging ear 931. When the right push plate 925 moves toward the electric push rod 921, the multi-station coupling 94 on the movable base 93 can be driven to move as a whole through the movable shackle 926 contacting the right hanging ear 932. The movable sling 926 is composed of two mutually perpendicular rods, one is a vertical rod and the other is a horizontal rod. Under normal conditions, the movable sling 926 is restricted by the abutment of the trigger base 927 and is located at the lowest point on the right push plate 925. At this time, the spring on the movable sling 926 is in a compressed state. When the movable sling 926 moves out of the range restricted by the trigger base 927, the top of the movable sling 926 loses its restriction and is bounced up by the spring on it. After the bounce, the horizontal rod at the bottom of the movable sling 926 is located between the right hanging ear 932 and the right The push plate 925 is located between the push plates 925, so that the movable sling 926 is convenient to move toward the electric push rod 921 at the beginning, and the movable base 93 is driven to move toward the electric push rod 921 as a whole through the abutment effect of the cross bar and the right hanging ear 932, until the movable sling 926 moves to the trigger base 927 again, and the inclined surface on the vertical rod is restricted by the top of the trigger base 927 to drive the movable sling 926 to move downward as a whole, so that the cross bar on the movable sling 926 and the right hanging ear 932 are misaligned, thereby losing the abutment effect on the movable base 93. The number of the left push tooth plate 923, the one-way drive tooth plate 924, the right push plate 925, the movable sling 926, the trigger base 927 and the switching gear 95 is set to two, which are respectively located at the two ends of the multi-station coupling 94, so that a synchronous push plate 922 can synchronously drive the two ends of the multi-station coupling 94, thereby improving the overall working stability of the multi-station coupling 94.

[0023] In addition, the one-way drive tooth plate 924 includes a tooth stem 9241, the two ends of which are fixedly connected to the left push tooth plate 923 and the right push plate 925, respectively. A plurality of limit slots 9242 are provided inside the tooth stem 9241, and the interiors of the plurality of limit slots 9242 are elastically connected to the limit teeth 9243 through torsion springs. The bottom of the limit teeth 9243 is provided with a protrusion for limiting the limit slots 9242. The limit teeth 9243 are used for one-way meshing driving the switching gear 95 to rotate. Fig. 9 As shown, the limit tooth 9243 rotates elastically in the limit slot 9242 through the torsion spring, and the protrusion at the bottom of the limit slot 9242 is restricted by the protrusion in the limit slot 9242 and can only rotate in one direction, or reset after one-way rotation. When the overall movement direction of the tooth stem 9241 is consistent with the limit tooth 9243 contacting the switching gear 95 to make way and rotate, the overall movement of the tooth stem 9241 will not drive the switching gear 95. Here, it is necessary to pre-set the resistance of driving the switching gear 95 to be greater than the elastic force of the limit tooth 9243 to rotate and make way, so as to ensure that the limit tooth 9243 can not engage with the switching gear 95 when contacting it, but make way and rotate in the limit slot 9242 under the influence of its own torsion spring elastic force. On the contrary, when the overall movement direction of the tooth stem 9241 does not conform to the limit tooth 9243 contacting the switching gear 95 to make way and rotate, the overall movement of the tooth stem 9241 will drive the switching gear 95 to rotate. By setting a one-way drive tooth plate 924, the one-way drive tooth plate 924 can only drive the switching gear 95 to rotate in one direction, so as to achieve the purpose of switching the repair machine bases on multiple workstation bases 96 in sequence, thereby achieving automated multi-means repair work on the rolling mill, achieving the effect of multi-means repair of a machine tool 1, and then avoiding the problem of traditional repair machine tools 1 moving the rolling mill or repairing the machine multiple times.

[0024] In addition, the automatic control device 92 also includes a driving connecting rod 10, one end of which is fixedly connected to the right push plate 925, and the surface of the driving connecting rod 10 slides inside the extended base 91 and the machine tool 1 respectively, and the other end of the driving connecting rod 10 is fixedly connected to the inclined guide seat 11, and the interior of the inclined guide seat 11 is slidably connected to the sliding shaft 12, and the end of the sliding shaft 12 is fixedly connected to the double-headed gear rod 13, and the double-headed gear rod 13 slides up and down inside the machine tool 1, and the ends of the upper protective tube 7 and the lower protective tube 8 are fixedly connected to the passive gear 14, and the two passive gears 14 are respectively engaged with the teeth at both ends of the double-headed gear rod 13. The right push plate 925 is driven by the driving connecting rod 10 The movable tilting guide seat 11 moves synchronously. During the movement, the tilting guide seat 11 drives the sliding shaft 12 to drive the double-headed gear rod 13 to move downward. During the downward movement of the double-headed gear rod 13, the passive gears 14 on the upper protective cylinder 7 and the lower protective cylinder 8 are respectively engaged and rotated simultaneously. The two passive gears 14 drive the upper protective cylinder 7 and the lower protective cylinder 8 to rotate relative to each other. After the rotation, the upper protective cylinder 7 and the lower protective cylinder 8 are merged and combined with the protective half cylinder 6 to form a cylindrical protective barrel, thereby realizing the closed protection of the rollers during maintenance, avoiding the splashing of debris, impurities, water and other substances, thereby avoiding the problem of debris getting stuck in the machine tool 1 and affecting the operation of the machine, thereby improving the safety of the working environment near the machine tool 1. At the same time, the upper protective tube 7 and the lower protective tube 8 utilize the meshing of the passive gear 14 and the double-headed gear rod 13, combined with the movement of the right push plate 925 to merge or open, thereby realizing the effect of automatic state switching. When the work station base 96 is close to the roller for repair, the upper protective tube 7 and the lower protective tube 8 are in a merged protective state. When the work station base 96 is away from the roller, the upper protective tube 7 and the lower protective tube 8 are in an open state, so that after the roller is repaired, the upper protective tube 7 and the lower protective tube 8 are automatically opened, which is convenient for unloading the roller for replacement and repair.

[0025] It is worth noting that one end of the passive fixture 4 passes through the interior of the machine tool 1 and is fixedly connected to a large transmission wheel 41. The surface of the large transmission wheel 41 is connected to a small transmission wheel 42 through a transmission belt. The interior of the small transmission wheel 42 is fixedly connected to a fan 43. The fan 43 is located inside the blast chamber 5 and rotates. The end of the small transmission wheel 42 is rotatably connected to the machine tool 1. The roller is installed between the active fixture 3 and the passive fixture 4 through the feeding equipment. The active fixture 3 and the passive fixture 4 adopt a detachable clamping mechanism for positioning and clamping the two ends of the roller. When the roller is clamped, the rotating motor 2 is started, and the output shaft of the rotating motor 2 is rotated through the active clamp The passive clamp 4 that is driven by the tool 3 and clamped with the roller can realize the rotation of the roller and assist the roller in the rotation type repair work. During the rotation, the passive clamp 4 drives the large transmission wheel 41 to rotate, and the large transmission wheel 41 drives the fan 43 on the small transmission wheel 42 to rotate in the blast chamber 5 through the transmission belt. When the fan 43 rotates in the blast chamber 5, it stirs the internal gas so that it is blown to the roller surface through the rectangular groove at the top of the protective semi-cylinder 6, and the air flow is used to realize wind cleaning of the roller surface, thereby reducing the retention of impurities such as debris and cleaning water on the roller surface, and the cleaned impurities such as debris and cleaning water are discharged through the rectangular groove at the bottom of the protective semi-cylinder 6.

[0026] When the device for repairing a worn roller of the present invention is in use, the roller is installed between the active clamp 3 and the passive clamp 4 through the feeding equipment. The active clamp 3 and the passive clamp 4 adopt a detachable clamping mechanism for positioning and clamping the two ends of the roller. The clamping mechanism is a prior art and will not be described in detail here. After the active clamp 3 and the passive clamp 4 clamp the roller to be repaired, the rotating motor 2 can be started, and the output shaft of the rotating motor 2 is transmitted to the passive clamp 4 clamped with the roller through the active clamp 3, thereby realizing the rotation of the roller, and assisting the roller in the rotational repair work.When the roller is loaded onto the active clamp 3 and the passive clamp 4, the electric push rod 921 is started, and the output shaft of the electric push rod 921 extends. The output shaft of the electric push rod 921 simultaneously pushes the two left push tooth plates 923 to move toward the active clamp 3 through the synchronous push plate 922. The left push tooth plate 923 drives the right push plate 925 and the movable gear 926 on the right push plate 925 to move synchronously through the one-way driving gear plate 924. During the movement, the teeth on the one-way driving gear plate 924 contact the switching gear 95 but do not drive it to rotate. The movable gear 926 slides on the inner wall at the top of the trigger base 927. When the movable gear 926 moves out of the trigger base After 927, the top of the movable sprocket 926 loses the squeezing effect. At this time, the movable sprocket 926 moves upward from the right push plate 925 to reset due to the elastic force of the spring on it, that is, the movable sprocket 926 bounces up, and the cross bar at the bottom of the movable sprocket 926 after bouncing up is located between the right hanging ear 932 and the right push plate 925. The left push tooth plate 923 continues to move, and in the subsequent movement, the teeth on the left push tooth plate 923 gradually penetrate the left hanging ear 931 and contact the switching gear 95. The teeth on the left push tooth plate 923 after contact fix the switching gear 95 at this location, and the surface of the left push tooth plate 923 contacts the surface of the left hanging ear 931. When the left push tooth plate 923 continues to move, it can drive the movable base 93 as a whole to move toward the roller at the active clamp 3 through the left hanging ear 931, and the movable base 93 drives the multi-station base 96 to move toward the protective semi-cylinder 6 through the multi-station connecting shaft 94. When a multi-station base 96 close to the protective semi-cylinder 6 is inserted into the slot 61, the electric push rod 921 stops working, and the corresponding maintenance machine seat on its multi-station base 96 is aligned with the roller to work, and the rotating motor 2 drives the roller on the active clamp 3 to rotate accordingly; when the right push plate 925 is moving toward the protective semi-cylinder 6, the right push plate 925 drives the inclined guide seat 11 to move simultaneously through the driving connecting rod 10. During the movement, the inclined guide seat 11 drives the sliding shaft 12 to drive the double-headed gear rod 13 to move downward. During the downward movement of the double-headed gear rod 13, the passive gears 14 on the upper protective cylinder 7 and the lower protective cylinder 8 are respectively engaged and rotated at the same time. The two passive gears 14 drive the upper protective cylinder 7 and the lower protective cylinder 8 to rotate relative to each other. After the rotation, the upper protective cylinder 7 and the lower protective cylinder 8 are merged and combined with the protective half cylinder 6 to form a cylindrical protective barrel, thereby realizing the closed protection of the rollers during maintenance, avoiding the splashing of debris, impurities, water and other substances, thereby avoiding the problem of debris getting stuck in the machine tool 1 and affecting the operation of the machine, and improving the safety of the working environment near the machine tool 1.

[0027] When the maintenance work is completed and the next maintenance work needs to be switched, the electric push rod 921 is started again. At this time, the output shaft of the electric push rod 921 retracts, and the output shaft of the electric push rod 921 drives the two left push tooth plates 923 to move toward the electric push rod 921 through the synchronous push plate 922. During the movement, the left push tooth plate 923 first moves away from the left hanging ear 931. After the teeth on the left push tooth plate 923 are disengaged from the upper groove of the left hanging ear 931, the left push tooth plate 923 that continues to move drives the right push plate 925 to move synchronously through the one-way driving tooth plate 924 until the movable shackle 926 on the right push plate 925 abuts against the right hanging ear 932. When the upper cross bar of the movable shackle 926 abuts against the right hanging ear 932, it can drive the movable base 93 to move toward the electric push rod 921 as a whole. The movable base 93 moves until the movable sling 926 moves to the trigger base 927 again. The inclined surface on the vertical rod is restricted by the top of the trigger base 927 and drives the movable sling 926 to move downward as a whole, so that the cross bar on the movable sling 926 is misaligned with the right hanging ear 932, thereby losing the abutment effect on the movable base 93. After losing the abutment effect, the left push tooth plate 923 that continues to move drives the upper limit tooth 9243 of the one-way driving tooth plate 924 to engage and drive the switching gear 95 to rotate. After the switching gear 95 rotates, the maintenance machine bases on multiple workstation bases 96 are switched in position. After the switching, the output shaft of the electric push rod 921 is controlled again to extend, so as to achieve the effect that the switched workstation base 96 automatically aligns with the roller for subsequent maintenance work. By arranging a plurality of workstation bases 96 distributed in a circular array on the multi-station coupling 94, and utilizing an electric push rod 921 to cooperate with the operation of various structures to realize automatic switching of a plurality of maintenance bases, it is possible to realize the effect of performing multiple maintenance on the rolling mill rolls, and multiple maintenance tasks can be completed without the need for the rolling mill rolls to be transported by multiple machine tools 1, thereby further improving the work efficiency during the maintenance of the rolling mill rolls. By using the telescopic power of an electric push rod 921 in cooperation with other structures, the plurality of workstation bases 96 are driven to first move away from the rolling mill rolls, and then perform rotation switching, and then move closer to the rolling mill rolls for alignment maintenance after the switching, thereby further avoiding the problem of motion interference between the plurality of workstation bases 96 and the rolling mill rolls during rotation switching.

[0028] The above implementation methods are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present invention. The patent protection scope of the embodiments of the present invention should be defined by the claims.

Claims

1. A device for repairing worn rollers, characterized in that: include: A machine tool (1), wherein a rotating motor (2) is mounted on the machine tool (1), an active fixture (3) is clamped on the output shaft of the rotating motor (2), and a passive fixture (4) is rotatably connected to the machine tool (1); A blast chamber (5), the blast chamber (5) being installed in the machine tool (1), and a protective half cylinder (6) being fixed on the blast chamber (5); An upper protective cylinder (7) and a lower protective cylinder (8), wherein the upper protective cylinder (7) and the lower protective cylinder (8) are both rotatably connected to the inside of the machine tool (1); An automatic switching repair device (9) is provided on a machine tool (1), the automatic switching repair device (9) comprising an extension base (91), the extension base (91) being fixed on the machine tool (1), the extension base (91) being provided with an automatic control device (92), the extension base (91) being slidably connected to a movable base (93), the movable base (93) being rotatably connected to a multi-station connecting shaft (94), the end of the multi-station connecting shaft (94) being fixedly connected to a switching gear (95), a plurality of station bases (96) being distributed in a circular array on the multi-station connecting shaft (94), the automatic control device (92) controlling the movement of the multi-station connecting shaft (94) to achieve function switching, and synchronously controlling the upper protective cylinder (7) and the lower protective cylinder (8) to rotate forward and reverse.

2. A roller wear repair device according to claim 1, characterized in that: The positions of the active clamp (3) and the passive clamp (4) correspond to each other and are used to clamp the roller. A snap-in groove (61) is provided on the protective half cylinder (6). The upper protective cylinder (7) and the lower protective cylinder (8) are symmetrically distributed with the central axis of the active clamp (3) as the symmetry axis.

3. The device for repairing a worn roller according to claim 1, characterized in that: The multiple workstation bases (96) are respectively equipped with a turning machine base, a grinding machine base, a cleaning machine base, a spraying machine base, and a surfacing machine base.

4. The device for repairing a worn roller according to claim 1, characterized in that: The automatic control device (92) comprises an electric push rod (921) and a trigger base (927) fixedly mounted on the extended base (91); the end of the electric push rod (921) is fixedly mounted on the extended base (91); the output shaft of the electric push rod (921) is clamped with a synchronous push plate (922); both ends of the synchronous push plate (922) are fixedly connected with a left push tooth plate (923); a side of the left push tooth plate (923) away from the synchronous push plate (922) is fixedly connected with a one-way drive tooth plate (924); a side of the one-way drive tooth plate (924) away from the synchronous push plate (922) is fixedly connected with a right push plate (925); and a side of the right push plate (925) close to the one-way drive tooth plate (924) is elastically connected with a movable lever (926) via a spring.

5. The device for repairing a worn roller according to claim 4, characterized in that: The synchronous push plate (922) slides on the extended base (91), the movable lever (926) slides on the right push plate (925), the top of the movable lever (926) is provided with an inclined surface, and the top of the right push plate (925) slides on the inner wall of the top of the trigger base (927).

6. The device for repairing a worn roller according to claim 2, characterized in that: A left hanging ear (931) and a right hanging ear (932) are respectively provided on both sides of the movable base (93), and a groove for inserting a left push tooth plate (923) is provided inside the left hanging ear (931).

7. The device for repairing a worn roller according to claim 4, characterized in that: The one-way driving tooth plate (924) comprises a tooth stem (9241), the two ends of the tooth stem (9241) are respectively fixedly connected to the left push tooth plate (923) and the right push plate (925), a plurality of limit slots (9242) are provided inside the tooth stem (9241), the interior of the plurality of limit slots (9242) are elastically connected to the limit teeth (9243) via torsion springs, a protrusion is provided at the bottom of the limit teeth (9243) for limiting the limit slots (9242), and the limit teeth (9243) are used for one-way meshing driving the switching gear (95) to rotate.

8. The device for repairing a worn roller according to claim 4, characterized in that: The automatic control device (92) further comprises a driving connecting rod (10), one end of which is fixedly connected to the right push plate (925), and the other end of which is fixedly connected to an inclined guide seat (11), the interior of which is slidably connected to a sliding shaft (12), and the end of which is fixedly connected to a double-headed gear rod (13).

9. The device for repairing a worn roller according to claim 8, characterized in that: The ends of the upper protective tube (7) and the lower protective tube (8) are fixedly connected to passive gears (14), and the two passive gears (14) are respectively meshed with teeth at both ends of the double-headed gear rod (13); the surfaces of the driving connecting rod (10) slide inside the extended base (91) and the machine tool (1), respectively, and the double-headed gear rod (13) slides inside the machine tool (1).

10. The device for repairing a worn roller according to claim 1, characterized in that: One end of the passive clamp (4) passes through the interior of the machine tool (1) and is fixedly connected to a large transmission wheel (41); the surface of the large transmission wheel (41) is connected to a small transmission wheel (42) via a transmission belt; the interior of the small transmission wheel (42) is fixedly connected to a fan (43); the fan (43) is located inside the blast chamber (5) and rotates; the end of the small transmission wheel (42) is rotatably connected to the machine tool (1).

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