Four-roller hydraulic transmission plate rolling machine

Abstract

The present application relates to the technical field of plate rolling machine equipment, in particular to a four-roller hydraulic transmission plate rolling machine, which comprises a rack and an upper roller; a dustproof assembly and a welding assembly are arranged inside the upper roller; the dustproof assembly is used for preventing dust, impurities and the like from entering the inside of the roller body through a chute; the welding assembly is used for welding the gap of the bent steel pipe; the plate rolling machine further comprises a positioning assembly, which is used for fixing the gap of the bent steel pipe at the bottom horizontal plane; the plate rolling machine is characterized in that the positioning assembly is used for clamping the processed gap of the steel pipe at the same vertical plane as the welding assembly; the welding assembly arranged inside the upper roller is used for welding the processed gap of the steel pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plate rolling machine equipment, in particular to a four-roller hydraulic transmission plate rolling machine. BACKGROUND

[0002] The plate rolling machine is a mechanical equipment for rolling the steel plate into a cylindrical or arc shape, which is usually driven by hydraulic pressure. The working principle of the plate rolling machine is to use the three-point circle principle to make the work roll move by using the action of hydraulic pressure and mechanical force, so as to process the straight steel plate into a cylindrical part. The common plate rolling machines are three-roller plate rolling machines and four-roller plate rolling machines. Compared with the three-roller plate rolling machine, the remaining straight edge of the processed part of the four-roller plate rolling machine is very small.

[0003] With the continuous increase of labor cost and the rapid development of plate rolling technology, people have higher and higher requirements for the efficiency of the rolled plate. In particular, after the steel pipe is rolled from the steel plate, it needs to be pushed out of the plate rolling machine and then welded. The efficiency of the integrated processing of the steel pipe is low, especially in large-scale production of thin steel plates. Therefore, a plate rolling machine that can weld after the steel pipe is processed is needed to improve the efficiency of processing thin steel pipes.

[0004] In view of the above problems, the prior art proposes an automatic welding mechanism for the plate rolling. The application number CN201510016834.6 discloses an automatic plate rolling welding equipment, and the application number CN202110151884.0 discloses a thin-walled steel plate automatic rolling and welding device. Although the prior art can solve the automatic welding of the plate rolling, the steel pipe formed by the plate rolling machine is always rotating around the center axis. The welding gap also rotates with the rotation of the steel pipe, which is not conducive to the positioning and welding of the welding track to the gap.

[0005] Therefore, a four-roller hydraulic transmission plate rolling machine is proposed. SUMMARY

[0006] The purpose of the present application is to provide a four-roller hydraulic transmission plate rolling machine to solve the problem of welding the gap of the steel pipe and the positioning problem when welding the gap of the steel pipe.

[0007] To achieve the above purpose, the present application provides the following technical scheme:

[0008] A four-roller hydraulic transmission plate rolling machine, comprising a rack and an upper roller, wherein the rack is of a rectangular structure, and the upper roller is installed in parallel with the length direction of the rack.

[0009] The upper roller comprises a roller body, side covers, a welding assembly and a dustproof assembly; the roller body is in a circular ring structure; the diameter of the roller body is 200-400 mm; the length of the roller body is 1000-1500 mm; a sliding groove is formed in the bottom of the roller body along the central axis direction; the width of the sliding groove is 40-150 mm; the length of the sliding groove is 800-1400 mm; the side covers are symmetrically installed on the left and right sides of the roller body; the dustproof assembly is coaxially installed inside the roller body; the dustproof assembly is used for preventing dust and impurities from entering the inside of the roller body through the sliding groove; the welding assembly is coaxially installed with the dustproof assembly; the welding assembly is installed inside the roller body; the welding assembly is used for welding the gap of the steel pipe after the steel plate is formed and bent.

[0010] Further comprising a positioning assembly fixedly installed on the left and right sides of the rack; the positioning assembly is used for fixing the gap of the steel pipe after the steel plate is formed and bent at the bottom horizontal plane of the steel pipe.

[0011] The side cover is in a cylindrical structure; the diameter of the side cover is 180-380 mm; a cavity is formed in the inside of the side cover; a rotating groove is formed in the side edge of the side cover around the central axis; the rotating groove is communicated with the cavity; the included angle between the two end faces of the rotating groove is 180 degrees.

[0012] The width of the rotating groove is 5-20 mm.

[0013] The dustproof assembly comprises a sealing plate, a connecting piece, a driven gear, a brushless motor and a driving gear; the sealing plate is in a long strip structure; the side cross section of the sealing plate is in a fan-shaped structure; the sealing plate is coaxially installed inside the upper roller; a T-shaped groove is formed in the side of the sealing plate close to the central axis along the central axis direction; the connecting piece is in an L-shaped structure; one end of the connecting piece is sleeved in the T-shaped groove; the other end of the connecting piece is fixedly connected with the center of the driven gear; the driven gear is arranged inside the cavity around the central axis of the side cover; the connecting piece is symmetrically arranged on the left and right sides of the sealing plate; the connecting piece rotates around the central axis of the sealing plate in the rotating groove; the brushless motor is arranged inside the left end of the roller body; the brushless motor is coaxially fixedly installed inside the cavity; the power of the brushless motor is 300 W; the brushless motor is electrically connected with a control system; a rotating shaft is coaxially fixedly installed in the cavity of the side cover at the other end of the roller body; the driving gear is sleeved on the output shaft of the brushless motor and the rotating shaft; the driving gear is engaged with the driven gear.

[0014] Natural rubber gasket strips are arranged on the four sides of the contact surface between the sealing plate and the roller body; the thickness of the natural rubber gasket strips is 1-5 mm.

[0015] The welding assembly comprises a lead screw, a rotating motor, a ball screw, an extension rod, a sleeve and a welding gun; the lead screw is coaxially installed in the interior of the roller body; one end of the lead screw is rotationally connected with the rotating motor; the power of the rotating motor is 400 W; the rotating motor is electrically connected with the control system; the other end of the lead screw is rotationally connected with the side cover; the rotating motor is arranged at the right end in the interior of the roller body; the rotating motor is electrically connected with the control system; the ball screw is sleeved on the lead screw; the bottom of the extension rod is fixedly connected with a sliding key; the extension rod is electrically connected with the control system; the sliding key is T-shaped in side section; the sliding key slides in the T-shaped groove of the sealing plate; the top of the extension rod is fixedly connected with the bottom of the sleeve; the sleeve is columnar in structure; a sliding cavity is formed in the interior of the sleeve; the ball screw is matched and sleeved in the sliding cavity; the ball screw slides in the sliding cavity; the top of the sleeve is fixedly connected with the welding gun; the width of the welding gun is 30-140 mm.

[0016] The welding gun is an argon arc welding gun; the welding gun is electrically connected with the control system.

[0017] The positioning assembly comprises a support, a sliding rail, a sliding block and a clamping wedge; the support is rectangular in structure; the support is horizontally arranged at the front and rear ends of the rack; the sliding rail is arranged on the upper portion of the support along the length direction of the rack; the sliding rail is provided with the sliding block; the sliding block is provided with a through hole matched with the side section of the sliding rail along the length direction; the sliding block slides on the sliding rail through the through hole on the sliding rail; the end, away from the rack, of the sliding block is connected with the moving end of a power rod through a spring; the fixed end of the power rod is fixedly connected to the upper portion of the support; the power rod is electrically connected with the control system; the side section of the clamping wedge is triangular in structure; the clamping wedge is detachably connected with the sliding block; the central axis of the clamping wedge is coaxial with the gap of the steel pipe.

[0018] The power rod is an electric rod.

[0019] The bottom width of the clamping wedge is 1-6 mm; the height is 20-80 mm.

[0020] Compared with the prior art, the application has the following beneficial effects:

[0021] 1. By arranging the welding assembly in the upper roller, the welding gun arranged on the ball screw can weld the processed steel pipe gap strip; the welding assembly can save the subsequent process of the plate rolling machine, making it more convenient to add an automatic assembly line; and the weld after welding by the welding assembly is more neat and beautiful.

[0022] 2、By setting the positioning assembly on both sides of the upper roller of the application, the wedge is pushed into the steel pipe gap by the power rod, the steel pipe gap can be fixed, the welding line of the welding assembly coincides with the steel pipe gap, and the welding assembly cannot be aligned with the steel pipe gap.

[0023] 3、By setting the dustproof assembly inside the upper roller of the application, the sliding groove of the upper roller is blocked by the sealing plate, the inside of the upper roller body can be isolated from the outside world, dust and impurities cannot enter the inside of the roller body, if dust and impurities enter the inside of the roller body, the welding gun will be contaminated, and the welding assembly will be affected. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the application;

[0025] Figure 2 It is a structural schematic diagram of the positioning assembly of the application;

[0026] Figure 3 It is a top view of the positioning assembly of the application;

[0027] Figure 4 It is a side cross-sectional view of the application;

[0028] Figure 5 It is Figure 4 the local enlarged view of a;

[0029] Figure 6 It is an external structural schematic diagram of the upper roller;

[0030] Figure 7 It is an internal structural schematic diagram of the upper roller;

[0031] Figure 8 It is a structural schematic diagram of the ball screw;

[0032] Figure 9 It is a structural schematic diagram of the side cover;

[0033] Figure 10 It is a structural schematic diagram of the connecting piece and the driving gear.

[0034] In the figure: 1, rack; 2, upper roller; 21, roller body; 211, sliding groove; 22, side cover; 221, cavity; 222, rotating groove; 23, dustproof assembly; 231, sealing plate; 232, connecting piece; 234, brushless motor; 235, driving gear; 24, welding assembly; 241, screw rod; 242, rotating motor; 243, ball screw; 244, telescopic rod; 245, clamping sleeve; 2451, sliding cavity; 246, welding gun; 3, steel pipe; 4, positioning assembly; 41, support; 42, sliding rail; 43, sliding block; 44, wedge. DETAILED DESCRIPTION

[0035] Referring to Figures 1 to 10 The application provides a four-roller hydraulic transmission plate rolling machine, and the technical scheme is as follows:

[0036] In the embodiment, the brushless motor has a power of 300W, the rotating motor has a power of 400W, the roller body 21 has a diameter of 300mm, and a length of 1200mm; the roller body 21 is made of Q235 carbon steel; and the embodiment is suitable for rolling a steel plate with a length of 600-1000mm and a thickness of 0.5mm-2mm.

[0037] The four-roller hydraulic transmission plate rolling machine comprises a rack 1 and an upper roller 2; the rack 1 has a rectangular structure; and the upper roller 2 is installed in parallel with the length direction of the rack 1.

[0038] The upper roller 2 comprises a roller body 21, side covers 22, a welding assembly 24 and a dustproof assembly 23; the roller body 21 has a circular ring structure; the roller body 21 has a diameter of 300mm and a length of 1200mm; the roller body 21 is made of Q235 carbon steel; the roller body 21 is provided with a sliding groove 211 at the bottom along the central axis direction; the sliding groove 211 has a width of 60mm and a length of 900mm; the side covers 22 are symmetrically installed on the left and right sides of the roller body 21; the dustproof assembly 23 is coaxially and rotatably installed in the interior of the roller body 21; the dustproof assembly 23 is used for preventing dust and impurities from entering the interior of the roller body 21 from the sliding groove 211; the welding assembly 24 is coaxially installed with the dustproof assembly 23; the welding assembly 24 is installed in the interior of the roller body 21; and the welding assembly 24 is used for welding the gap of the formed and bent steel pipe.

[0039] The conventional four-roller plate rolling machine needs to take out the formed and bent cylinder for welding after the straight plate is rolled into a cylinder; however, when a flow line operation is needed, the automation degree is not high; if manual welding is used, the weld seam is slightly not flat in the welding process, which affects the appearance; the welding assembly 24 is sleeved in the interior of the upper roller 2, so that the formed and bent cylinder directly saves the subsequent welding process, the weld seam is more beautiful and reliable, dust and impurities on the surface of the steel plate are easily scratched when the upper roller 2 works; at this time, the dustproof assembly 23 is arranged below the sliding groove 211, so that the interior of the roller body 21 is isolated from the outside, dust and impurities are prevented from entering the interior of the roller body 21, and the operation safety of the interior mechanism of the roller body 21 is improved.

[0040] The steel plate is sent into the plate rolling machine along the width direction of the plate rolling machine, the lower roller is lifted through the hydraulic transmission unit, so as to cooperate with the upper roller 2 to clamp the steel plate therebetween; at this time, the upper roller 2 rotates the steel plate to move to one side of the four-roller plate rolling machine; after pre-bending and positioning of the side roller, the straight steel plate can be processed into a round steel pipe.

[0041] At this time, after the four-roller plate bending machine determines the weld, the lower roller falls to clamp the steel pipe between the upper roller 2 and the side roller; then the side roller falls by 20-50 mm to leave a certain gap between the upper roller 2 and the steel pipe to prevent the welded steel plate from being connected to the roller body 21 due to welding heating; at this time, the upper roller 2 rotates to align the chute 211 with the weld; then the dustproof assembly 23 rotates to align the welding assembly 24 with the chute 211, thereby facilitating welding of the steel pipe gap.

[0042] The positioning assembly 4 is fixedly installed on the left and right sides of the rack 1; the positioning assembly 4 is used to fix the steel pipe gap after the steel plate is formed and bent at the bottom horizontal plane of the steel pipe; if the weld is not positioned, the chute 211 cannot be aligned with the weld, so that the welding assembly 24 cannot weld the weld.

[0043] The side cover 22 is a cylindrical structure; the diameter of the side cover 22 is 280 mm; the side cover 22 is made of Q235 carbon steel; the inside of the side cover 22 is provided with a cavity 221; the side edge of the side cover 22 is provided with a rotating groove 222 around the central axis; the rotating groove 222 communicates with the cavity 221; the included angle between the two end faces of the rotating groove 222 is 180 degrees.

[0044] The width of the rotating groove 222 is 5-20 mm; the rotating groove 222 needs to have a gap to allow the connecting rod to slide inside.

[0045] The dustproof assembly 23 includes a sealing plate 231, a connecting piece 232, a driven gear, a brushless motor 234, and a drive gear 235; the sealing plate 231 is a long strip structure; the length of the sealing plate 231 is 1000 mm; the width of the sealing plate 231 is 80 mm; the side cross section of the sealing plate 231 is a fan-shaped structure; the sealing plate 231 is coaxially and rotatably installed inside the upper roller 2; a T-shaped groove is formed in the side of the sealing plate 231 close to the central axis along the central axis direction; the width of the T-shaped groove is 15 mm; the connecting piece 232 is an L-shaped structure; one end of the connecting piece 232 is sleeved in the T-shaped groove; the other end of the connecting piece 232 is fixedly connected with the center of the driven gear; the driven gear is arranged inside the cavity 221 around the central axis of the side cover 22;

[0046] The connecting piece 232 is symmetrically arranged on the left and right sides of the sealing plate 231; the connecting piece 232 rotates around the central axis of the sealing plate 231 in the rotating groove 222; the brushless motor 234 is arranged at the left end inside the roller body 21; the brushless motor 234 is coaxially and fixedly installed inside the cavity 221; the power of the brushless motor 234 is 300 W; the brushless motor 234 is electrically connected with the control system; a rotating shaft is coaxially and fixedly installed in the cavity 221 of the side cover 22 at the other end of the roller body 21; the drive gear 235 is sleeved on the output shaft of the brushless motor 234 and the rotating shaft; the drive gear 235 is engaged with the driven gear;

[0047] Since the upper roller 2 side wall needs to be provided with a sliding groove 211 to enable the welding assembly 24 to slide, if the sliding groove 211 is not sealed, dust on the surface of the steel plate and dust in the external space can easily enter the inside of the roller body 21 from the sliding groove 211 when the upper roller 2 is rolling the steel plate. With the sealing plate 231, dust cannot enter the inside of the roller body 21 through the sliding groove 211, so that the welding assembly 24 is not affected by dust in the working process, thereby improving the working stability.

[0048] The control system controls the brushless motor 234 to start, so that the driving gear 235 rotates, thereby enabling the driven gear meshing with the driving gear 235 to rotate. Since one end of the connecting piece 232 is fixedly connected with the central shaft of the driven gear, the connecting piece 232 rotates around the central shaft of the roller body 21. Since the other end of the connecting piece 232 is fixedly sleeved in the T-shaped groove of the sealing plate 231, the connecting piece 232 on both sides of the sealing plate 231 drives the sealing plate 231 to rotate around the central shaft of the roller body 21.

[0049] Natural rubber gasket strips are arranged on the four sides of the contact surface between the sealing plate 231 and the roller body 21. The thickness of the natural rubber gasket strips is 1-5 mm. In order to ensure the sealing performance between the sealing plate 231 and the roller body 21, a sealing strip needs to be additionally arranged on the contact surface between the sealing plate 231 and the roller body 21. Since the sealing plate 231 needs to rotate around the central shaft of the roller body 21, the sealing strip needs to have wear resistance and deformation ability.

[0050] The welding assembly 24 comprises a lead screw 241, a rotating motor 242, a ball screw 243, an extension rod 244, a sleeve 245 and a welding gun 246. The lead screw 241 is coaxially arranged in the inside of the roller body 21. One end of the lead screw 241 is rotatably connected with the rotating motor 242. The power of the rotating motor 242 is 400 W. The rotating motor 242 is electrically connected with the control system. The other end of the lead screw 241 is rotatably connected with the side cover 22. The rotating motor 242 is arranged at the right end of the inside of the roller body 21. The rotating motor 242 is electrically connected with the control system. The ball screw 243 is sleeved on the lead screw 241. The bottom of the extension rod 244 is fixedly connected with a sliding key. The extension rod 244 is electrically connected with the control system. The sliding key is T-shaped in side section. The sliding key slides in the T-shaped groove of the sealing plate 231. The top of the extension rod 244 is fixedly connected with the bottom of the sleeve 245. The sleeve 245 is columnar in structure. The inside of the sleeve 245 is provided with a sliding cavity 2451. The ball screw 243 is matchedly sleeved in the sliding cavity 2451. The ball screw 243 slides in the sliding cavity 2451. The top of the sleeve 245 is fixedly connected with the welding gun 246. The width of the welding gun 246 is 50 mm.

[0051] When the steel pipe gap is positioned and needs to be gap welded, the control system controls the brushless motor 234 to rotate, so that the welding assembly 24 rotates around the center axis of the roller body 21 to the sliding groove 211; then the control system controls the telescopic rod 244 to extend, driving the sleeve 245 to move to the sliding groove 211; finally the welding gun 246 is made to extend from the inside of the roller body 21 to the outside of the roller body 21 through the sliding groove 211; then the control system controls the rotating motor 242 to rotate, so that the lead screw 241 rotates; since the bottom of the ball screw 243 is fixedly connected with the telescopic rod 244, the lead screw 241 rotates around the center axis, thereby driving the ball screw 243 to slide in the length direction of the lead screw 241; thereby driving the welding gun 246 to slide in the sliding groove 211 along the length direction of the sliding groove 211.

[0052] The welding gun 246 adopts an argon arc welding gun 246; the welding wire of the argon arc welding gun 246 is connected with the welding machine placed outside through the side cover 22 on one side of the upper roller 2; at this time, the clamping wedge 44 is made of Q235 carbon steel; the welding tongs are clamped on the clamping wedge 44 on the same side of the side cover 22 through which the cable passes; the argon arc welding produces small welding deformation when welding the butt joint; the welding work is reliable and stable; and it is not necessary to apply a coating layer on the surface of the workpiece, which is more conducive to the use of automatic equipment; the argon arc welding is rapid in response and high in processing strength when processing thin steel pipes.

[0053] The positioning assembly 4 comprises a bracket 41, a sliding rail 42, a sliding block 43 and a clamping wedge 44; the bracket 41 is of a rectangular structure; the bracket 41 is horizontally arranged at the front and rear ends of the rack 1; the sliding rail 42 is arranged on the upper part of the bracket 41 along the length direction of the rack 1; the sliding rail 42 is provided with the sliding block 43; the sliding block 43 is provided with a through hole matched with the side section of the sliding rail 42 in the length direction; the sliding block 43 slides on the sliding rail 42 through the through hole; the end of the sliding block 43 away from the rack 1 is connected with the moving end of a power rod through a spring; the fixed end of the power rod is fixedly connected to the upper part of the bracket 41; the power rod is electrically connected with the control system; the clamping wedge 44 is of a triangular structure in side section; the clamping wedge 44 is detachably connected with the sliding block 43; the center axis of the clamping wedge 44 is coaxial with the steel pipe gap;

[0054] When the straight steel plate is processed into a round steel pipe, the steel pipe gap needs to be positioned, so that the moving track of the welding assembly 24 can be accurately aligned with the track of the steel pipe weld; if the steel pipe weld is not positioned, the welding assembly 24 may not be able to weld the steel pipe weld, thereby improving the working stability of the welding assembly 24; after the straight steel plate is processed into a round steel pipe, the power rod pushes the spring, thereby pushing the sliding block 43 to move on the sliding rail 42, thereby pushing the clamping wedge 44 to move towards the inside of the rack 1;

[0055] When the wedge 44 hits the end face of the steel pipe, the wedge 44 will be stuck and cannot continue to advance; at this time, the spring is deformed; at this time, the upper roller 2 continues to rotate, causing the steel pipe to rotate; when the wedge 44 encounters the steel pipe gap, the wedge 44 will be pushed into the inside of the steel pipe gap due to the elastic potential energy of the spring, so that the steel pipe is positioned at the bottom surface; at this time, the control system controls the steel pipe to stop rotating; then the hydraulic transmission unit controls the lower roller to fall, so that the upper roller 2 is suspended; then the control side roller falls, so that the steel pipe falls vertically along the central axis of the wedge 44 and the upper roller 2 no longer contacts the wedge 44; at the beginning of welding, the control system controls one side of the wedge 44 to push out of the steel pipe gap; when the welding is completed for two-thirds, the control system controls the other side of the wedge 44 to push out of the steel pipe gap.

[0056] And different widths of the wedge 44 can be replaced according to different processed steel pipe gaps.

[0057] The power rod adopts an electric rod; during the process of the wedge 44 being clamped into the steel pipe gap, a certain heavy load capacity is required; and the hydraulic rod can also be consistent with the power source of the external hydraulic transmission system, avoiding too many power sources and making the device power source complex.

[0058] The bottom width of the wedge 44 is 2 mm; the height is 30 mm; since the gap of the steel plate rolled into a steel pipe is proportional to its diameter, different thicknesses of the wedge need to be replaced; in this embodiment, since the thickness of the steel plate is thin, a 2 mm thick wedge 44 is selected; when the steel pipe falls, the wedge 44 needs to have a certain height so that the wedge 44 will not be separated from the central axis of the wedge 44 during the process of the steel pipe falling in the steel pipe gap.

[0059] Specific embodiment two: the brushless motor power in this embodiment is 350 W, the rotating motor power is 450 W, the wedge is 4 mm, the diameter of the roller body 21 is 400 mm; the length is 1400 mm; the roller body 21 adopts Q235 carbon steel material; this embodiment is suitable for rolling a steel plate with a length of 1200-1400 mm and a thickness of 3 mm-6 mm.

[0060] Working principle:

[0061] The steel plate is pushed into the upper roller 2 and the lower roller; at this time, the lower roller is lifted and clamps the steel plate; then the side roller on one side of the rack 1 is lifted to pre-bend the steel plate, and after the pre-bending is completed, it is lowered; then the upper roller 2 rotates to push the steel plate into the four-roller hydraulic plate rolling machine; then the side roller on the other side is lifted to guide and position the pre-bent steel plate; then the upper roller 2 continuously rotates to bend the steel plate into a steel pipe.

[0062] Then the side rollers on both sides lift to support the formed steel pipe, and then the power rod in the positioning assembly 4 pushes the sliding block 43 to slide on the sliding rail 42, so that the clamping wedge 44 on the sliding block 43 is pushed against the end face of the steel pipe; at this time, the upper roller 2 rotates to push the steel pipe to rotate, and when the clamping wedge 44 encounters the gap of the steel pipe, the clamping wedge 44 will be pushed into the gap of the steel pipe; then the upper roller 2 stops rotating, and then the lower roller and the side roller fall at the same time; so that the upper roller 2 is not in contact with the steel pipe; then the upper roller 2 rotates so that the sliding groove 211 at the upper roller 2 is in the same vertical plane as the gap of the steel pipe.

[0063] Then the rotating motor inside the upper roller 2 rotates, and the sealing plate 231 is rotated by the connecting piece 232, so that the welding gun 246 symmetrical to the sealing plate 231 is rotated above the gap of the steel pipe; then the telescopic rod 244 is extended so that the welding gun 246 is aligned with the gap of the steel pipe; during the welding process, the rotating motor 242 inside the upper roller 2 rotates, thereby driving the lead screw 241 to rotate; since the welding gun 246 is sleeved on the lead screw 241 by the ball screw 243, and the bottom of the ball screw 243 is connected with the T-shaped groove at the bottom of the sealing plate 231 by the telescopic rod 244; therefore, when the rotating motor 242 rotates, the welding gun 246 slides along the length direction of the lead screw 241; thereby completing the sliding operation of the welded joint.

[0064] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A four-roll hydraulic transmission plate rolling machine, comprising a rack (1) and an upper roller (2); the rack (1) is a rectangular structure; the upper roller (2) is installed in parallel with the length direction of the rack (1); characterized in that: the upper roller (2) comprises a roller body (21), a side cover (22), a dustproof assembly (23) and a welding assembly (24); the side cover (22) is a cylindrical structure; a cavity (221) is formed in the inside of the side cover (22); a rotating groove (222) is formed in the side edge of the side cover (22) around the central axis; the rotating groove (222) communicates with the cavity (221); the roller body (21) is a circular ring structure; a sliding groove (211) is formed in the bottom of the roller body (21) along the central axis direction; the side cover (22) is symmetrically installed on the left and right sides of the roller body (21); the dustproof assembly (23) is coaxially installed in the inside of the roller body (21); the dustproof assembly (23) is used for preventing dust and impurities from entering the inside of the roller body (21) from the sliding groove (211); the welding assembly (24) is coaxially installed with the dustproof assembly (23); the welding assembly (24) is used for welding the gap of the bent steel pipe; the welding assembly (24) comprises a lead screw (241), a rotating motor (242), a ball screw (243), an extension rod (244), a clamping sleeve (245) and a welding gun (246); the lead screw (241) is coaxially installed in the inside of the roller body (21); the bottom of the extension rod (244) is fixedly connected with a sliding key; the sliding key slides in the T-shaped groove of the sealing plate (231); the dustproof assembly (23) comprises a sealing plate (231), a connecting piece (232), a driven gear, a brushless motor (234) and a driving gear (235); the sealing plate (231) is a long strip structure; the side cross section of the sealing plate (231) is a fan-shaped structure; the sealing plate (231) is coaxially installed in the inside of the upper roller (2); a T-shaped groove is formed in the side of the sealing plate (231) close to the central axis along the central axis direction; the connecting piece (232) is an L-shaped structure; One end of the connecting piece (232) is sleeved in the T-shaped slot, and the other end of the connecting piece (232) is fixedly connected with the center of the driven gear; the driven gear is arranged inside the cavity (221) around the central axis of the side cover (22); the connecting piece (232) is symmetrically arranged on the left and right sides of the sealing plate (231); the connecting piece (232) rotates around the central axis of the sealing plate (231) in the rotating groove (222); the brushless motor (234) is arranged at the inner left end of the roller body (21); the brushless motor (234) is coaxially fixedly installed inside the cavity (221); the cavity (221) of the side cover (22) at the other end of the roller body (21) is coaxially fixedly installed with a rotating shaft; the driving gear (235) is sleeved on the output shaft of the brushless motor (234) and the rotating shaft; the driving gear (235) is engaged with the driven gear; The top of the telescopic rod (244) is fixedly connected with the bottom of the sleeve (245); the ball screw (243) is matched and sleeved in the sliding cavity (2451); the top of the sleeve (245) is fixedly connected with the welding gun (246); Further comprising a positioning assembly (4) fixedly installed on the left and right sides of the rack (1); the positioning assembly (4) is used for fixing the steel pipe gap after the steel plate is formed and bent on the bottom horizontal plane. The thickness of the rolled steel plate is 0.5mm-2mm or 3mm-6mm.

2. A four-high hydraulic transmission plate rolling machine according to claim 1, characterized in that: The width of the rotating groove (222) is 5-20mm.

3. A four-high hydraulic transmission plate rolling machine according to claim 1, characterized in that: Natural rubber gasket strips are arranged on the four edges of the contact surface between the sealing plate (231) and the roller body (21).

4. A four-high hydraulic transmission plate rolling machine according to claim 1, characterized in that: One end of the screw rod (241) is rotatably connected with the rotating motor (242); the other end of the screw rod (241) is rotatably connected with the side cover (22); the rotating motor (242) is arranged at the inner right end of the roller body (21); the ball screw (243) is sleeved on the screw rod (241); the sleeve (245) is a columnar structure; the sleeve (245) is internally provided with a sliding cavity (2451); the ball screw (243) slides in the sliding cavity (2451).

5. A four-high hydraulic transmission plate rolling machine according to claim 1, characterized in that: The welding gun (246) is an argon arc welding gun.

6. A four-high hydraulic transmission plate rolling machine according to claim 1, characterized in that: The positioning assembly (4) comprises a bracket (41), a slide rail (42), a sliding block (43) and a clamping wedge (44); the bracket (41) is of a rectangular structure; the bracket (41) is horizontally arranged at the front and rear ends of the rack (1); the slide rail (42) is arranged on the upper portion of the bracket (41) along the length direction of the rack (1); the slide rail (42) is provided with the sliding block (43); the sliding block (43) slides on the slide rail (42); the end of the sliding block (43) away from the rack (1) is connected with the moving end of a power rod through a spring; the fixed end of the power rod is fixedly connected to the upper portion of the bracket (41); the clamping wedge (44) is of a triangular structure in the side section; the clamping wedge (44) is fixedly connected with the sliding block (43); the central axis of the clamping wedge (44) is coaxial with the steel pipe gap.

7. A four-high hydraulic transmission plate rolling machine according to claim 6, characterized in that: The power rod is an electric rod.

8. A four-high hydraulic transmission plate rolling machine according to claim 6, characterized in that: The bottom width of the clamping wedge (44) is 1-6 mm.

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