Center-distance-adjustable three-roller horizontal down-regulation type plate rolling machine

Abstract

The invention relates to the technical field of plate bending machines, and discloses a center-distance-adjustable three-roller horizontal down-regulation type plate bending machine which comprises an upper roller assembly, two groups of lower roller assemblies and a hydraulic unit, supporting racks are arranged at the two ends of the upper roller assembly, rotating rods are mounted on the inner walls of the two supporting racks, and the rotating rods are arranged on the lower roller assemblies. Driving motors are installed on the side faces of the two supporting racks correspondingly, one end of each rotating rod is connected with an output shaft of the corresponding driving motor, transmission assemblies are symmetrically arranged on the rotating rods, one ends of the transmission assemblies extend to the outer portions of the supporting racks and are provided with supporting arms, and supporting bases are arranged at the top ends of the supporting arms. And a supporting roller shaft is mounted on the inner wall of the supporting seat. According to the center-distance-adjustable three-roller horizontal down-regulation type plate rolling machine, the supporting arms, the supporting seats and the supporting roller shafts are arranged, the supporting arms support the upper roller body on the two sides, the upper roller is kept stable when a rolling plate is dismounted, and friction and collision between the upper roller body and the rolling plate are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of plate rolling machines, in particular to a three-roller horizontal downward adjustment plate rolling machine with adjustable center distance. Background Art

[0002] Plate rolling machine is a kind of equipment that uses working rollers to bend and shape sheet materials. It can form parts of different shapes such as cylindrical parts and conical parts. It is a very important processing equipment. The working principle of plate rolling machine is to use external forces such as hydraulic pressure and mechanical force to move the working rollers, so as to press or roll the sheet materials. According to the rotation movement and position change of working rollers of different shapes, oval parts, arc parts, cylindrical parts and other parts can be processed.

[0003] Currently, it is common that the plate needs to be unloaded after the plate rolling machine completes rolling. During the unloading process, a lifting device is used to lift the tail of the upper roller to maintain the balance of the upper roller. After lifting, the upper roller will shake and have poor stability, which makes it easy for friction and collision to occur between the upper roller and the rolled plate. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a three-roller horizontal downward plate rolling machine with adjustable center distance, which solves the problems mentioned in the above background.

[0005] The present invention provides the following technical solution: a three-roller horizontal downward adjustment plate rolling machine with adjustable center distance, comprising: an upper roller assembly, two groups of lower roller assemblies and a hydraulic unit, support frames are provided at both ends of the upper roller assembly, rotating rods are installed on the inner walls of the two support frames, driving motors are installed on the sides of the two support frames, and one end of the rotating rod is connected to the output shaft of the driving motor, transmission assemblies are symmetrically arranged on the rotating rods, one end of the transmission assembly extends to the outside of the support frame and is installed with a support arm, a support seat is provided at the top of the support arm, a support roller shaft is installed on the inner wall of the support seat, the two groups of lower roller assemblies are symmetrically installed between the two support frames, and the upper roller assembly and the two groups of lower roller assemblies are connected to the hydraulic unit.

[0006] In some embodiments, the upper roller assembly includes an upper roller body and four vertical movement cylinders, upper roller bearing seats are installed at both ends of the upper roller body, the upper roller bearing seats are installed inside the supporting frame, the inner walls of the two upper roller bearing seats are installed with first double-row self-aligning rolling bearings, and the inner walls of the first double-row self-aligning rolling bearings are connected to one end of the upper roller body, the bottoms of the two upper roller bearing seats are installed with guide mounting seats, and the surfaces of the two guide mounting seats are installed with side bracket assemblies, the four vertical movement cylinders are divided into two groups and are respectively installed on two supporting frames, and the two vertical movement cylinders are respectively located on both sides of the upper roller bearing seats, the telescopic ends of the vertical movement cylinders are connected to one end of the guide mounting seat, the surface on which one of the upper roller bearing seats is installed is installed with a drive assembly, and the drive assembly is connected to one end of the upper roller body.

[0007] In some embodiments, the guide mounting seat is provided with four guide surfaces, and the inner wall of the support frame is provided with guide grooves at positions corresponding to the guide surfaces, and the guide surfaces are slidably connected to the inner wall of the guide grooves; The two hydraulic units each include a programmable controller, a servo drive, a servo motor, a master cylinder and a main transmission oil pump. The programmable controller is respectively connected to the master cylinder and the servo drive signal, the servo drive is connected to the servo motor, the master cylinder is connected to the main transmission oil pump, and the main transmission oil pump of one of the hydraulic units is connected to the vertical movement cylinder; The lower roller assembly includes a lower roller body, both ends of the lower roller body are provided with lower roller bearing seats, the two lower roller bearing seats are respectively mounted on two supporting frames, the inner wall of the lower roller bearing seat is mounted with a second double-row self-aligning rolling bearing, and the inner wall of the second double-row self-aligning rolling bearing is connected to one end of the lower roller body, the surface of the lower roller bearing seat is connected with a horizontal moving cylinder, the horizontal moving cylinder is mounted on the supporting frame, one of the main transmission oil pumps of the hydraulic unit is connected to the horizontal moving cylinder, the lower roller assembly also includes a second hydraulic motor and a second planetary gear reducer, the second planetary gear reducer is mounted on the surface of the lower roller bearing seat, and the inner wall of the second planetary gear reducer is connected to one end of the lower roller body, and the output end of the second hydraulic motor is connected to the input end of the second planetary gear reducer.

[0008] Preferably, the transmission assembly includes a driving bevel gear, a driven bevel gear and a transmission rod, the driving bevel gear is mounted on the surface of a rotating rod, the transmission rod is rotatably connected to a support frame, and one end of the transmission rod is connected to an inner wall of the driven bevel gear, and the other end of the transmission rod extends to the outside of the support frame and is connected to one end of a support arm.

[0009] Preferably, the side bracket assembly includes a balancing cylinder and a fixed seat, the fixed seat is installed on the surface of the guide mounting seat, the balancing cylinder is rotatably connected to one end of the fixed seat, a connecting seat is provided on the top of the balancing cylinder, and a pin is provided on the inner wall of the connecting seat, one of the connecting seats of the side bracket assembly is rotatably connected to a first lifting ear through a pin, and the first lifting ear is connected to the surface of the first planetary gear reducer, and the other connecting seat of the connecting seat side bracket assembly is rotatably connected to a second lifting ear through a pin, and the second lifting ear is connected to the surface of the upper roller bearing seat.

[0010] Preferably, the drive assembly includes a first hydraulic motor and a first planetary gear reducer, the first planetary gear reducer is installed on the surface where the upper roller bearing seat is installed, the first hydraulic motor is connected to the input end of the first planetary gear reducer, and the upper roller body is installed at the output end of the first planetary gear reducer.

[0011] Preferably, it also includes a machine base, which includes a fixed frame, a position adjustment component is arranged inside the fixed frame, movable plates are arranged at both ends of the position adjustment component, the movable plate is connected to the top of the fixed frame, the supporting frame is installed on the top of the movable plate, a positioning component is installed on the movable plate, and the positioning component is connected to the surface of the fixed frame.

[0012] Preferably, the fixed frame includes a chassis, and a supporting steel rod and a reinforcing steel rod are symmetrically installed on the top of the chassis, two reinforcing steel rods are located between the two supporting steel rods, and the two reinforcing steel rods and the two supporting steel rods are movably connected to the bottom of the movable plate.

[0013] Preferably, the position adjustment component comprises a bidirectional hydraulic actuator, which is mounted on the top of the chassis, and both ends of the bidirectional hydraulic actuator are connected to a docking seat, which is mounted on the bottom of the moving plate.

[0014] Preferably, guide rails are symmetrically installed on the top of the chassis, and guide blocks are installed on the bottom of the movable plate, and the guide blocks are slidably connected to the top of the guide rails.

[0015] Preferably, the positioning assembly comprises an adjustment seat, an inner wall of the adjustment seat is threadedly connected with an adjustment rod, the bottom end of the adjustment rod is connected with an anti-slip fixing plate, and the top end of the adjustment rod is connected with a turntable.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a support arm, a support seat and a support roller shaft. The support arm supports the upper roller body on both sides. When the rolled plate is unloaded, the upper roller remains stable, avoiding friction and collision between the upper roller body and the rolled plate.

[0017] 2. The upper roller body, vertical movement cylinder, upper roller bearing seat, first double-row self-aligning rolling bearing and guide mounting seat, four identical vertical movement cylinders are installed on the supporting frame, and the upper roller body is driven to move through the guide mounting seat and the upper roller bearing seat. The four identical vertical movement cylinders are all pressure cylinders, which makes the movement synchronization precision high, and reduces the upper roller bearing seat and guide mounting seat of the upper roller body to concentrate the weight load of the upper roller body and the vertical movement cylinder, avoids easy metal fatigue of the mounting seat, and prolongs the service life of the upper roller bearing seat and the guide mounting seat.

[0018] 3. The present invention makes the movement of the guide mounting seat and the upper roller bearing seat more stable by arranging four guide surfaces of the guide mounting seat to cooperate with the four guide grooves in the supporting frame, thereby stabilizing the movement of the upper roller body. When the position of the upper roller body remains unchanged, the four guide surfaces cooperate with the four guide grooves in the supporting frame to stabilize the position of the upper roller body, so that the steel plate can be rolled stably.

[0019] 4. In the present invention, by setting a hydraulic unit, the rotation speed of the servo motor can control the oil supply of the main transmission oil pump. When the vertical moving cylinder or the horizontal moving cylinder reaches the required working pressure, the servo motor will be blocked, that is, the pressure is maintained, the rotation is stopped, and the heating of the oil is reduced.

[0020] 5. The present invention sets a machine base, a support frame is installed on the movable plate, a fixed frame supports the movable plate, and a position adjustment component pushes the movable plate to move, so as to facilitate adjustment of the position between the two support frames and installation of the upper roller component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the upper roller assembly of the present invention; Figure 3 This is a schematic diagram of the internal structure of the support frame of the present invention; Figure 4 It is a schematic diagram of the hydraulic unit of the present invention; Figure 5 It is a schematic diagram of the structure of the transmission assembly of the present invention; Figure 6 This is a schematic diagram of the structure of the lower roller assembly of the present invention; Figure 7 It is a schematic diagram of the machine base structure of the present invention.

[0022] In the figure: 1. Upper roller assembly; 101. Upper roller body; 102. Vertical moving cylinder; 103. Upper roller bearing seat; 104. First double-row spherical rolling bearing; 105. Guide mounting seat; 1051. Guide surface; 2. Lower roller assembly; 201. Lower roller body; 202. Lower roller bearing seat; 203. Second double-row spherical rolling bearing; 204. Horizontal moving cylinder; 205. Second hydraulic motor; 206. Second planetary gear reducer; 3. Hydraulic unit; 301. Programmable controller; 302. Servo drive; 303. Servo motor; 304. Main cylinder; 305. Main transmission oil pump; 4. Support frame; 5. Side bracket assembly; 501. Balance cylinder; 502. Fixed seat; 503. Connecting seat; 504. Pin; 6. Driving assembly; 601, first hydraulic motor; 602, first planetary gear reducer; 7, rotating rod; 8, driving motor; 9, transmission assembly; 901, active bevel gear; 902, driven bevel gear; 903, transmission rod; 10, fixed frame; 1001, chassis; 1002, supporting steel rod; 1003, reinforcing steel rod; 11, position adjustment assembly; 1101, two-way hydraulic transmission; 1102, connecting seat; 12, moving plate; 13, positioning assembly; 1301, adjusting seat; 1302, adjusting rod; 1303, anti-skid fixing plate; 1304, turntable; 14, supporting arm; 15, supporting seat; 16, supporting roller; 17, guide groove; 18, first lifting ear; 19, second lifting ear; 20, guide rail; 21, guide block. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-2 , a three-roller horizontal downward plate rolling machine with adjustable center distance, comprising: an upper roller assembly 1, two groups of lower roller assemblies 2 and a hydraulic unit 3, both ends of the upper roller assembly 1 are provided with a support frame 4, the inner walls of the two support frames 4 are provided with a rotating rod 7, the sides of the two support frames 4 are provided with a driving motor 8, and one end of the rotating rod 7 is connected to the output shaft of the driving motor 8, and a transmission assembly 9 is symmetrically arranged on the rotating rod 7, one end of the transmission assembly 9 extends to the outside of the support frame 4 and is provided with a supporting arm 14, the top of the support arm 14 is provided with a supporting seat 15, and the inner wall of the supporting seat 15 is provided with a supporting roller shaft 16, and the two groups of lower roller assemblies 2 are symmetrically installed between the two support frames 4, and the upper roller assembly 1 and the two groups of lower roller assemblies 2 are connected with a hydraulic unit 3; See also Figure 2-3, the upper roller assembly 1 includes an upper roller body 101 and four vertical moving cylinders 102, upper roller bearing seats 103 are installed at both ends of the upper roller body 101, and the upper roller bearing seats 103 are installed inside the supporting frame 4, the inner walls of the two upper roller bearing seats 103 are installed with first double-row spherical rolling bearings 104, and the inner walls of the first double-row spherical rolling bearings 104 are connected to one end of the upper roller body 101, the bottoms of the two upper roller bearing seats 103 are installed with guide mounting seats 105, and the surfaces of the two guide mounting seats 105 are installed with side bracket assemblies 5, the four vertical moving cylinders 102 are divided into two groups and are respectively installed on two supporting frames 4, and the two vertical moving cylinders 102 are respectively located on both sides of the upper roller bearing seats 103, and the telescopic ends of the vertical moving cylinders 102 are connected to one end of the guide mounting seat 105, and the surface on which one of the upper roller bearing seats 103 is installed is installed with a driving assembly 6, and the driving assembly 6 is connected to one end of the upper roller body 101; Four guide surfaces 1051 are arranged on the guide mounting seat 105, and guide grooves 17 are arranged on the inner wall of the support frame 4 at positions corresponding to the guide surfaces 1051. The guide surfaces 1051 are slidably connected to the inner wall of the guide grooves 17. Four identical vertical moving cylinders 102 are installed on the support frame 4, and the upper roller body 101 is driven to move by the guide mounting seat 105 and the upper roller bearing seat 103. The four identical vertical moving cylinders 102 are all pressure cylinders, so that the movement synchronization accuracy is high, and the upper roller bearing seat 103 of the upper roller body 101 and the guide mounting seat 105 are reduced to concentrate the weight load of the upper roller body 101 and the vertical moving cylinder 102, so as to avoid metal fatigue of the mounting seat and extend the service life of the upper roller bearing seat 103 and the guide mounting seat 105. See also Figure 4 The two hydraulic units 3 each include a programmable controller 301, a servo driver 302, a servo motor 303, a main oil cylinder 304 and a main transmission oil pump 305. The programmable controller 301 is respectively connected to the main oil cylinder 304 and the servo driver 302 by signal, the servo driver 302 is connected to the servo motor 303, the main oil cylinder 304 is connected to the main transmission oil pump 305, and the main transmission oil pump 305 of one of the hydraulic units 3 is connected to the vertical moving oil cylinder 102. The speed of the servo motor 303 can control the oil supply of the main transmission oil pump 305. When the vertical moving oil cylinder 102 or the horizontal moving oil cylinder 204 reaches the required working pressure, the servo motor 303 will be blocked, that is, the pressure is maintained, the rotation is stopped, and the heating of the oil is reduced.

[0025] See also Figure 5The transmission assembly 9 includes a driving bevel gear 901, a driven bevel gear 902 and a transmission rod 903. The driving bevel gear 901 is installed on the surface of the rotating rod 7. The transmission rod 903 is rotatably connected to the support frame 4, and one end of the transmission rod 903 is connected to the inner wall of the driven bevel gear 902. The other end of the transmission rod 903 extends to the outside of the support frame 4 and is connected to one end of the support arm 14. The driving motor 8 drives the connecting rod to rotate, and the connecting rod drives the driving bevel gear 901 to rotate. The driving bevel gear 901 drives the driven bevel gear 9 02 rotates, the driven bevel gear 902 drives the transmission rod 903 to rotate, the transmission rod 903 drives the support arm 14 to rotate, the support arm 14 drives the support seat 15 to move toward the upper roller body 101, the support seat 15 drives the support roller shaft 16 to contact the upper roller body 101, and supports the upper roller body 101. When rolling the plate, the drive motor 8 rotates in the opposite direction, and the support arm 14 can be adjusted to move in the direction away from the upper roller body 101, so that the support arm 14 can be unfolded to support the plate. The two drive motors 8 drive the two connecting rods respectively.

[0026] The driving assembly 6 includes a first hydraulic motor 601 and a first planetary gear reducer 602. The first planetary gear reducer 602 is installed on the surface where the upper roller bearing seat 103 is installed. The first hydraulic motor 601 is connected to the input end of the first planetary gear reducer 602, and the upper roller body 101 is installed at the output end of the first planetary gear reducer 602.

[0027] The side bracket assembly 5 includes a balancing cylinder 501 and a fixed seat 502, the fixed seat 502 is installed on the surface of the guide mounting seat 105, the balancing cylinder 501 is rotatably connected to one end of the fixed seat 502, a connecting seat 503 is arranged on the top of the balancing cylinder 501, a pin shaft 504 is arranged on the inner wall of the connecting seat 503, one of the connecting seats 503 of the side bracket assembly 5 is rotatably connected to the guide groove 18 through the pin shaft 504, the guide groove 18 is connected to the surface of the first planetary gear reducer 602, and the other connecting seat 503 of the side bracket assembly 5 is rotatably connected to the second lifting ear 19 through the pin shaft 504, and the second lifting ear 19 is connected to the surface of the upper roller bearing seat 103.

[0028] See also Figure 6The lower roller assembly 2 includes a lower roller body 201, both ends of the lower roller body 201 are provided with lower roller bearing seats 202, the two lower roller bearing seats 202 are respectively mounted on two supporting frames 4, the inner wall of the lower roller bearing seat 202 is mounted with a second double-row self-aligning rolling bearing 203, and the inner wall of the second double-row self-aligning rolling bearing 203 is connected to one end of the lower roller body 201, the surface of the lower roller bearing seat 202 is connected with a horizontal moving cylinder 204, the horizontal moving cylinder 204 is mounted on the supporting frame 4, a main transmission oil pump 305 of one hydraulic unit 3 is connected to the horizontal moving cylinder 204, the lower roller assembly 2 also includes a second hydraulic motor 205 and a second planetary gear reducer 206, the second planetary gear reducer 206 is mounted on the surface of the lower roller bearing seat 202, and the inner wall of the second planetary gear reducer 206 is connected to one end of the lower roller body 201, and the output end of the second hydraulic motor 205 is connected to the input end of the second planetary gear reducer 206.

[0029] See also Figure 1 and Figure 7, and also includes a machine base, the machine base includes a fixed frame 10, a position adjustment component 11 is arranged inside the fixed frame 10, and both ends of the position adjustment component 11 are provided with a moving plate 12, the moving plate 12 is connected to the top of the fixed frame 10, the support frame 4 is installed on the top of the moving plate 12, and a positioning component 13 is installed on the moving plate 12, and the positioning component 13 is connected to the surface of the fixed frame 10, and the fixed frame 10 includes a chassis 1001, and the top of the chassis 1001 is symmetrically installed with support steel rods 10 02 and reinforcing steel rods 1003, the two reinforcing steel rods 1003 are located between the two supporting steel rods 1002, the two reinforcing steel rods 1003 and the two supporting steel rods 1002 are movably connected to the bottom of the moving plate 12, the position adjustment component 11 includes a bidirectional hydraulic transmission 1101, the bidirectional hydraulic transmission 1101 is installed on the top of the chassis 1001, both ends of the bidirectional hydraulic transmission 1101 are connected with a connecting seat 1102, the connecting seat 1102 is installed at the bottom of the moving plate 12, and the top of the chassis 1001 is connected to the connecting seat 1102. The guide rail 20 is symmetrically installed on the bottom of the movable plate 12, and the guide block 21 is installed at the bottom of the movable plate 12. The guide block 21 is slidably connected to the top of the guide rail 20. The positioning assembly 13 includes an adjustment seat 1301, and the inner wall of the adjustment seat 1301 is threadedly connected to an adjustment rod 1302. The bottom end of the adjustment rod 1302 is connected to an anti-skid fixing plate 1303, and the top of the adjustment rod 1302 is connected to a turntable 1304. The two support frames 4 are respectively installed on the two movable plates 12. The bidirectional hydraulic actuator 1101 is started, and the bidirectional hydraulic actuator 11 The telescopic ends at both ends of 01 extend out through the connecting seat 1102 to drive the moving plate 12 to move. When the moving plate 12 moves, it drives the guide block 21 to slide on the surface of the guide rail 20, and then guides the moving plate 12 and adjusts it to a suitable position. The turntable 1304 is rotated to drive the adjusting rod 1302 to rotate, so that the adjusting rod 1302 pushes the position of the anti-slip fixed plate 1303 to drop and contact with the chassis 1001, thereby further stabilizing the position of the moving plate 12, facilitating the adjustment of the distance between the two supporting frames 4, and facilitating the installation of the upper roller assembly 1.

[0030] The telescopic end movement of the vertical moving cylinder 102 drives the guide mounting seat 105 to move, and the guide mounting seat 105 drives the upper roller bearing seat 103 to move, thereby adjusting the position of the upper roller body 101. The telescopic end movement of the horizontal moving cylinder 204 drives the lower roller bearing seat 202 to move, and the lower roller bearing seat 202 drives the lower roller body 201 to move, and adjusts the position of the lower roller body 201. The first hydraulic motor 601 and the first planetary gear reducer 602 are directly coupled to the upper roller body 101 to drive the upper roller body 101 to move. The second hydraulic motor 205 and the second planetary gear reducer 206 drive the lower roller body 201 to rotate through gear transmission torque. The upper roller body 101 and the lower roller body 201 are both driving rollers. The upper roller body 101 is the main transmission, and the lower roller body 201 is the auxiliary transmission. The speed difference between the upper roller body 101 and the lower roller body 201 can be adjusted to compensate for the surface speed of the upper roller body 101 and the lower roller body 201.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-roller horizontal downward plate rolling machine with adjustable center distance, characterized in that: include: An upper roller assembly (1), two groups of lower roller assemblies (2) and a hydraulic unit (3), wherein both ends of the upper roller assembly (1) are provided with a support frame (4), the inner walls of the two support frames (4) are both installed with a rotating rod (7), the sides of the two support frames (4) are both installed with a driving motor (8), and one end of the rotating rod (7) is connected to the output shaft of the driving motor (8), a transmission assembly (9) is symmetrically arranged on the rotating rod (7), one end of the transmission assembly (9) extends to the outside of the support frame (4) and is installed with a supporting arm (14), a supporting seat (15) is provided at the top end of the supporting arm (14), and a supporting roller shaft (16) is installed on the inner wall of the supporting seat (15), the two groups of lower roller assemblies (2) are symmetrically installed between the two support frames (4), and the upper roller assembly (1) and the two groups of lower roller assemblies (2) are both connected with a hydraulic unit (3).

2. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 1 is characterized in that: The upper roller assembly (1) comprises an upper roller body (101) and four vertically movable cylinders (102); upper roller bearing seats (103) are installed at both ends of the upper roller body (101); the upper roller bearing seats (103) are installed inside the support frame (4); the inner walls of the two upper roller bearing seats (103) are installed with first double-row spherical rolling bearings (104); the inner walls of the first double-row spherical rolling bearings (104) are connected to one end of the upper roller body (101); the bottoms of the two upper roller bearing seats (103) are installed with guide mounting seats (104); 5), and the surfaces of the two guide mounting seats (105) are both installed with side bracket assemblies (5), the four vertical movable cylinders (102) are divided into two groups and are respectively installed on the two supporting frames (4), and the two vertical movable cylinders (102) are respectively located on both sides of the upper roller bearing seat (103), the telescopic ends of the vertical movable cylinders (102) are connected to one end of the guide mounting seat (105), and the surface on which one of the upper roller bearing seats (103) is installed is installed with a driving assembly (6), and the driving assembly (6) is connected to one end of the upper roller body (101).

3. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 2 is characterized in that: Four guide surfaces (1051) are arranged on the guide mounting seat (105), and guide grooves (17) are arranged at positions of the inner wall of the support frame (4) corresponding to the guide surfaces (1051), and the guide surfaces (1051) are slidably connected to the inner walls of the guide grooves (17); The two hydraulic units (3) each comprise a programmable controller (301), a servo drive (302), a servo motor (303), a main oil cylinder (304) and a main transmission oil pump (305); the programmable controller (301) is respectively connected to the main oil cylinder (304) and the servo drive (302) by signals; the servo drive (302) is connected to the servo motor (303); the main oil cylinder (304) is connected to the main transmission oil pump (305); and the main transmission oil pump (305) of one of the hydraulic units (3) is connected to the vertical movement oil cylinder (102); The lower roller assembly (2) comprises a lower roller body (201), both ends of the lower roller body (201) are provided with lower roller bearing seats (202), the two lower roller bearing seats (202) are respectively mounted on two supporting frames (4), the inner wall of the lower roller bearing seat (202) is mounted with a second double-row self-aligning rolling bearing (203), and the inner wall of the second double-row self-aligning rolling bearing (203) is connected to one end of the lower roller body (201), the surface of the lower roller bearing seat (202) is connected with a horizontal moving cylinder (204), and the horizontal moving cylinder (204) is mounted on the supporting frame (4). On the frame (4), a main transmission oil pump (305) of one of the hydraulic units (3) is connected to the horizontal moving cylinder (204), characterized in that the lower roller assembly (2) also includes a second hydraulic motor (205) and a second planetary gear reducer (206), the second planetary gear reducer (206) is installed on the surface of the lower roller bearing seat (202), and the inner wall of the second planetary gear reducer (206) is connected to one end of the lower roller body (201), and the output end of the second hydraulic motor (205) is connected to the input end of the second planetary gear reducer (206).

4. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 1 is characterized in that: The transmission assembly (9) comprises a driving bevel gear (901), a driven bevel gear (902) and a transmission rod (903); the driving bevel gear (901) is mounted on the surface of the rotating rod (7); the transmission rod (903) is rotatably connected to the support frame (4); one end of the transmission rod (903) is connected to the inner wall of the driven bevel gear (902); the other end of the transmission rod (903) extends to the outside of the support frame (4) and is connected to one end of the support arm (14).

5. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 1 is characterized in that: The side bracket assembly (5) comprises a balancing cylinder (501) and a fixed seat (502), wherein the fixed seat (502) is mounted on the surface of the guide mounting seat (105) and connected thereto, the balancing cylinder (501) is rotatably connected to one end of the fixed seat (502), a connecting seat (503) is arranged on the top of the balancing cylinder (501), and a pin shaft (504) is arranged on the inner wall of the connecting seat (503), wherein one of the connecting seats (503) of the side bracket assembly (5) is rotatably connected to a guide groove (18) via the pin shaft (504), and the guide groove (18) is connected to the surface of the first planetary gear reducer (602), and the other connecting seat (503) of the side bracket assembly (5) is rotatably connected to a second lifting lug (19) via the pin shaft (504), and the second lifting lug (19) is connected to the surface of the upper roller bearing seat (103).

6. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 1 is characterized in that: The driving assembly (6) comprises a first hydraulic motor (601) and a first planetary gear reducer (602), wherein the first planetary gear reducer (602) is mounted on a surface on which an upper roller bearing seat (103) is mounted, the first hydraulic motor (601) is connected to an input end of the first planetary gear reducer (602), and the upper roller body (101) is mounted on an output end of the first planetary gear reducer (602).

7. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 1 is characterized in that: The machine base also includes a machine base, which includes a fixed frame (10), a position adjustment component (11) is arranged inside the fixed frame (10), and movable plates (12) are arranged at both ends of the position adjustment component (11), and the movable plate (12) is connected to the top of the fixed frame (10), and the support frame (4) is installed on the top of the movable plate (12), and a positioning component (13) is installed on the movable plate (12), and the positioning component (13) is connected to the surface of the fixed frame (10).

8. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 7 is characterized in that: The fixed frame (10) comprises a chassis (1001), and a supporting steel rod (1002) and a reinforcing steel rod (1003) are symmetrically mounted on the top of the chassis (1001), the two reinforcing steel rods (1003) are located between the two supporting steel rods (1002), and the two reinforcing steel rods (1003) and the two supporting steel rods (1002) are movably connected to the bottom of the movable plate (12).

9. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 8, characterized in that: The position adjustment component (11) comprises a bidirectional hydraulic actuator (1101), the bidirectional hydraulic actuator (1101) being mounted on the top of the chassis (1001), both ends of the bidirectional hydraulic actuator (1101) being connected to a connection seat (1102), and the connection seat (1102) being mounted on the bottom of the moving plate (12); A guide rail (20) is symmetrically mounted on the top of the chassis (1001), and a guide block (21) is mounted on the bottom of the movable plate (12), wherein the guide block (21) is slidably connected to the top of the guide rail (20).

10. The three-roller horizontal downward plate rolling machine with adjustable center distance according to claim 7, characterized in that: The positioning assembly (13) comprises an adjustment seat (1301), the inner wall of the adjustment seat (1301) being threadedly connected to an adjustment rod (1302), the bottom end of the adjustment rod (1302) being connected to an anti-slip fixing plate (1303), and the top end of the adjustment rod (1302) being connected to a rotating plate (1304).

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