A straightening and rounding mechanism

Abstract

The present invention provides a straightening and rounding mechanism, belonging to the technical field of the production of cylindrical pipes, which includes: a stretching and straightening assembly, a cutting assembly, a winding drum assembly, and a pressing and rounding assembly. The stretching assembly includes two rotating triangular boxes, and a first straightening roller, a second straightening roller, and a third straightening roller are respectively arranged between each corner of the two rotating triangular boxes. The first straightening roller is arranged between the two rotating triangular boxes in a liftable manner, and the first straightening roller and the second straightening roller or the third straightening roller are not located at the top of the workbench at the same time. The pressing and rounding assembly includes pressing blocks movably arranged on the front and rear sides of the workbench, and a rotating support member is movably arranged between the pressing blocks on the front and rear sides. The outer diameter of the rotating support member increases and decreases in the opposite direction as the distance between the two pressing blocks changes. Therefore, the present invention has the advantages of being able to straighten the metal sheet before curling and round the metal sheet after curling.

Description

Technical Field

[0001] The present invention belongs to the technical field of production equipment for metal pipes used in air conditioners, and particularly relates to a straightening and rounding mechanism. Background Art

[0002] Currently, cylindrical pipes are required in the condensers of air conditioners and other structures of air conditioners. These cylindrical pipes are usually formed by rolling metal sheets. Since these cylindrical pipes are used inside air conditioners or in cooperation with air conditioner structures, there are relatively high requirements for their weight. The metal sheets used for such cylindrical pipes are not metals with high quality and hardness such as steel plates, but soft metal sheets with relatively light weight.

[0003] The existing method for manufacturing such cylindrical pipes is usually to place a metal sheet with a certain width on a rolling machine to roll the thin metal sheet into a cylindrical shape, and then open one end of the rolling machine to take out the rolled cylindrical metal sheet from the rolling machine. Before the metal sheet is rolled into a cylinder, there may be bent or folded parts on the metal sheet itself. Since it is necessary to ensure the flatness of the surface of the metal sheet after it is rolled into a cylinder, it is necessary to manually unfold or cut the uneven parts on the surface of the metal sheet for straightening; due to the characteristics of this metal sheet itself, when it is rolled into a cylinder and taken out from the rolling machine, the cylindrical metal sheet may be uneven due to different surface forces, such as surface depressions or bends, and it is necessary to round it to make the diameter of each part the same.

[0004] In the prior art, straightening, cutting, rolling, and rounding are carried out by different devices respectively, and straightening, cutting, rolling, and rounding are not integrated into one, resulting in low production efficiency; in addition, the trimming method for straightening the flatness of the metal sheet surface and the method for rounding the rolled cylindrical metal sheet are both to observe its surface manually and hammer and stretch the uneven parts on the surface for trimming. This trimming method is laborious, so the degree of flatness after trimming is not high, and the manual observation and trimming method is not comprehensive, and some small uneven parts may be missed. Summary of the Invention

[0005] The present invention provides a straightening and rounding mechanism, which integrates straightening, cutting, rolling, and rounding, improving the production efficiency of cylindrical pipes; and can straighten the metal sheet before it is rolled into a cylinder and round the rolled cylindrical metal sheet.

[0006] The technical solution of the present invention is realized as follows: A straightening and rounding mechanism is arranged on a workbench and includes:

[0007] A stretching and straightening component is rotatably arranged inside the workbench to stretch and straighten the metal sheet entering the workbench;

[0008] A cutting component and a reel component for cutting and reeling a metal sheet after being stretched by a stretching component;

[0009] A pressing and rounding component for rounding the reeled metal sheet;

[0010] The stretching component includes two rotation triangular boxes symmetrically arranged front and back. Between each corner of the front and back rotation triangular boxes, a first straightening roller, a second straightening roller, and a third straightening roller are respectively arranged. The first straightening roller is vertically movable between the two rotation triangular boxes. The limit position of the first straightening roller when it descends is not lower than the height of the center position of the rotation triangular box. The first straightening roller and the second straightening roller or the third straightening roller are not simultaneously located at the top of the workbench;

[0011] The pressing and rounding component includes pressing blocks symmetrically and movably arranged on the front and back sides of the workbench. A circular rotation support component is movably arranged between the pressing blocks on the front and back sides. The outer diameter of the rotation support component increases and decreases in the opposite direction as the distance between the two pressing blocks changes.

[0012] As a preferred implementation manner, each rotation triangular box is respectively provided with a first long slot. Each rotation triangular box is respectively fixedly provided with a first air cylinder. The two ends of the first straightening roller are respectively fixedly connected to the movable ends of the first air cylinder and inserted into the first long slot. The second straightening roller includes a first roller body and a second roller body. The first roller body is vertically movable above the first roller body. The second straightening roller includes two third roller bodies and a fourth roller body. The third roller body is vertically movable above the fourth roller body.

[0013] As a preferred implementation manner, the rotation triangular box is in an equilateral triangle shape. The rotation triangular box rotates clockwise or counterclockwise within the workbench and the rotation angle is less than or equal to 180°. When the second straightening roller or the third straightening roller rotates to the top position of the workbench, the metal sheet passes through the middle of the second straightening roller or the third straightening roller. When the second straightening roller and the third straightening roller are simultaneously located at the top of the workbench and the second straightening roller and the third straightening roller are in the same horizontal plane, the metal sheet passes through the middle of the second straightening roller and the third straightening roller in sequence. When the first straightening roller is located at the top of the workbench, the metal sheet passes through the middle of the second straightening roller, the top of the first straightening roller, and the middle of the third straightening roller in sequence.

[0014] As a preferred implementation manner, second air cylinders are respectively fixedly arranged on the front and back sides at the right end of the workbench. An arc-shaped depression is arranged on one side of each pressing block opposite to the center of the workbench. The radian of the depression is less than π / 6. The depressions of the pressing blocks on the front and back sides are arranged oppositely. The movable ends of the second air cylinders on the front and back sides are respectively fixedly connected to the pressing blocks on the front and back sides.

[0015] As a preferred embodiment, a driving motor is fixedly arranged inside the workbench, a circular through hole is formed on the surface of the workbench, a rotating disc is fixedly arranged on the rotating shaft of the driving motor, the rotating support component includes a column fixed on the top of the rotating disc, a cylindrical column is fixedly arranged on the top of the rotating disc, the diameter of the column is smaller than that of the rotating disc, a first movable sleeve and a second movable sleeve are sequentially sleeved on the surface of the column from top to bottom, a plurality of uniformly distributed support rods are arranged on the outer side of the column along the circumferential direction thereof, the support rods are vertically arranged and parallel to the column, the support rods are movably arranged on the outer side of the column, the connection lines between each support rod enclose a circle, and the diameter of the circle enclosed by the support rods becomes larger or smaller as the first movable sleeve moves up and down.

[0016] As a preferred embodiment, two sets of driving components are arranged inside the column, each set of driving components penetrates through the surface of the column and is respectively fixedly connected with the first movable sleeve and the second movable sleeve to drive the first movable sleeve and the second movable sleeve to move up and down on the surface of the column, the first movable sleeve and the second movable sleeve move towards each other or away from each other, and they do not move in the same direction.

[0017] As a preferred embodiment, second long holes are respectively formed on both sides of the column, the second long holes on both sides are respectively located at both ends of the diameter of the column, a support plate is fixedly arranged inside the column, driving cylinders are respectively fixedly arranged at the top and the bottom of the support plate, the movable end of the top driving cylinder is vertically and fixedly provided with a first connecting rod, both ends of the first connecting rod are respectively movably arranged in the second long holes, both ends of the first connecting rod are fixedly connected with the first movable sleeve, the movable end of the bottom driving cylinder is vertically and fixedly provided with a second connecting rod, both ends of the second connecting rod are respectively movably arranged in the second long holes, and both ends of the second connecting rod are fixedly connected with the second movable sleeve.

[0018] As a preferred embodiment, a first movable rod and a second movable rod are respectively hinged on the upper and lower parts of the opposite side of each support rod and the column, the bottom of the first movable rod is hinged with the second movable sleeve, the top of the second movable rod is hinged with the first movable sleeve, and the middle part of the first movable rod is hinged with the middle part of the second movable sleeve.

[0019] As a preferred embodiment, a housing is fixedly arranged above the left part of the workbench, a first fixing plate is fixedly arranged at the right end of the housing, an arc-shaped groove is formed in the front side of the fixing plate workbench, a second fixing plate is fixedly arranged at the rear side of the workbench, the first fixing plate is fixedly connected with the second fixing plate, the cutting component includes a second cutter fixedly arranged on the surface of the workbench, a first cutter is arranged below the first fixing plate in a liftable manner, the first cutter is located directly above the second cutter, a third cylinder is fixedly arranged at the top of the first fixing plate, and the movable end of the third cylinder passes through the first fixing plate and is fixedly connected with the first cutter.

[0020] As a preferred embodiment, a third fixed plate is fixedly arranged at the bottom of the first fixed plate and the bottom of the second fixed plate, a fourth fixed plate is fixedly arranged at the bottom of the front side of the first fixed plate, a first rolling roller is arranged between the fourth fixed plate and the third fixed plate, a fifth fixed plate is movably arranged below the fourth fixed plate, a second rolling roller is fixedly arranged between the fifth fixed plate and the third fixed plate, a hydraulic cylinder is fixedly arranged at the top of the first fixed plate, a screw is fixedly arranged on the rotating shaft of the hydraulic cylinder, a threaded hole is opened at the top of the fifth fixed plate, and the bottom of the screw is threadedly connected in the threaded hole.

[0021] After adopting the above technical solution, the beneficial effects of the present invention are:

[0022] 1. When the metal sheet enters the workbench box, it is first stretched and straightened by the stretching and straightening assembly to make its surface relatively flat. The straightened metal sheet enters the cutting assembly and the reel assembly. The reel assembly rolls the metal sheet into a circle. The rolled metal sheet is cut by the cutting assembly to cut off the excess part of the metal sheet. The metal sheet rolled into a cylinder stays in the reel assembly. The metal sheet rolled into a cylinder is then taken out of the reel assembly and put into the pressing and rounding device. The metal sheet rolled into a cylinder is sleeved on the outside of the rotating support component. As the pressing assembly approaches the rotating support component, the rotating support component unfolds in the metal sheet rolled into a cylinder, adheres to its inner wall and rotates inside it. As the rotating support component rotates continuously, the metal sheet rolled into a cylinder is rounded to achieve the purpose of surface finishing of the metal sheet.

[0023] 2. The different working states brought about by the rotating triangle box at different angles can process metal sheets in different forms such as folding or bending, straighten their surfaces, and avoid uneven surfaces that affect the subsequent rolling process;

[0024] 3. The driving component drives the support rod to be opened outside the column. The diameter of the circle formed by the connecting line between each support rod gradually increases until the support rod contacts the inner surface of the cylinder. At this time, the outer surface of the cylinder is pressed by the front and rear clamping blocks. As the driving motor rotates, the disc rotates, the disc rotates, and the column rotates. The column rotates and drives the entire rotating support component to rotate in the cylinder. As the support rod makes a circular motion in the cylinder, the surface of the support rod is in full contact with the inner surface of the cylinder. As the support rod rotates continuously, the concave part of the cylinder surface is opened, and the roundness calibration process is realized.

[0025] 4. The metal sheet rolled into a cylinder by the reel assembly can be taken out horizontally from the groove on the front side of the workbench and between the first and second reel rollers. In this process, there is no need to manually open the connection between the reel rollers, making it more convenient to take out the metal sheet rolled into a cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the structural schematic diagram of the present invention;

[0027] Figure 2 is Figure 1 the structural schematic diagram of removing the manipulator in

[0028] Figure 3 is Figure 2 the enlarged structural diagram of part A in

[0029] Figure 4 is the structural schematic diagram of the stretching and straightening component;

[0030] Figure 5 is the structural schematic diagram of the pressing and rounding component;

[0031] Figure 6 is the structural schematic diagram of two rotating triangular boxes and their connection;

[0032] Figure 7 is the structural schematic diagram of the rotating support member 10;

[0033] Figure 8 is the structural schematic diagram of the column;

[0034] Figure 9 is Figure 8 the vertical sectional schematic diagram of

[0035] Figure 10 is the structural schematic diagram of the rear triangular box;

[0036] Figure 11 is the structural schematic diagram of the rotating triangular box rotating 45 degrees clockwise or counterclockwise;

[0037] Figure 12 is the structural schematic diagram of the rotating triangular box rotating 90 degrees clockwise or counterclockwise;

[0038] Figure 13 is the structural schematic diagram of the rotating triangular box rotating 180° clockwise or counterclockwise.

[0039] In the figure, 1 - stretching and straightening component; 2 - cutting component; 3 - reel component; 4 - pressing and rounding component; 5 - rotating triangular box; 6 - first straightening roller; 7 - second straightening roller; 8 - third straightening roller; 9 - pressing block; 10 - rotating support component; 11 - first long hole; 12 - first cylinder; 13 - first roller body; 14 - second roller body; 15 - third roller body; 16 - fourth roller body; 17 - second cylinder; 18 - depression; 19 - driving motor; 20 - through hole; 21 - rotating disc; 22 - column; 23 - first movable sleeve; 24 - second movable sleeve; 25 - support rod; 26 - driving component; 27 - second long hole; 28 - support plate; 29 - driving cylinder; 30 - first connecting rod; 31 - second connecting rod; 32 - first movable rod; 33 - second movable rod; 34 - housing; 35 - first fixing plate; 36 - groove; 37 - second fixing plate; 38 - first cutting knife; 39 - second cutting knife; 40 - third cylinder; 41 - third fixing plate; 42 - fourth fixing plate; 43 - first rounding roller; 44 - fifth fixing plate; 45 - second rounding roller; 46 - hydraulic cylinder; 47 - lifting rod; 48 - jack; 49 - workbench; 50 - manipulator. Detailed implementation manner

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] As Figures 1 to 13 shown, a straightening and rounding mechanism is arranged on the workbench 49 and includes:

[0042] The stretching and straightening component 1 is rotatably arranged in the workbench 49 to stretch and straighten the metal sheet entering the workbench 49;

[0043] The cutting component 2 and the reel component 3 cut and roll the metal sheet stretched by the stretching component into a cylinder;

[0044] The pressing and rounding component 4 rounds the metal sheet after being wound into a reel;

[0045] The stretching and straightening component 1 includes two rotating triangular boxes 5 symmetrically arranged front and back. Between each corner of the two rotating triangular boxes 5 front and back, a first straightening roller 6, a second straightening roller 7, and a third straightening roller 8 are respectively arranged. The first straightening roller 6 is vertically movable between the two rotating triangular boxes 5. The lowest limit position of the first straightening roller 6 is not lower than the height of the center position of the rotating triangular box 5. The first straightening roller 6 and the second straightening roller 7 or the third straightening roller 8 are not simultaneously located at the top of the workbench 49;

[0046] The pressing and roundness-correcting assembly 4 includes pressing blocks 9 symmetrically and movably arranged on the front and rear sides of the workbench 49. A circular rotating support member 10 is movably arranged between the pressing blocks 9 on the front and rear sides. The outer diameter of the rotating support member 10 increases and decreases in the opposite direction as the distance between the two pressing blocks 9 changes.

[0047] When the metal sheet enters the interior of the workbench 49, it first passes through the stretching and straightening assembly 1 for stretching and straightening to make its surface relatively flat. The straightened metal sheet then enters the cutting assembly 2 and the winding drum assembly 3. The winding drum assembly 3 rounds the metal sheet. The rounded metal sheet is cut by the cutting assembly 2 to cut off the excess part of the metal sheet. The metal sheet wound into a cylinder stays in the winding drum assembly 3. Then, the metal sheet wound into a cylinder is taken out from the winding drum assembly 3 and placed into the pressing and roundness-correcting device. The metal sheet wound into a cylinder is sleeved outside the rotating support member 10. As the pressing assembly approaches the rotating support member 10, the rotating support member 10 unfolds inside the metal sheet wound into a cylinder, fits tightly against its inner wall, and rotates inside it. As the rotating support member 10 rotates continuously, the metal sheet wound into a cylinder is corrected in roundness, achieving the purpose of trimming the surface of the metal sheet. Therefore, this mechanism integrates straightening, cutting, rounding, and roundness correction, improving the production efficiency of cylindrical pipes.

[0048] Each rotating triangular box 5 is respectively provided with a first long hole 11. A first air cylinder 12 is respectively fixedly arranged on each rotating triangular box 5. The two ends of the first straightening roller 6 are respectively fixedly connected to the movable ends of the first air cylinders 12 and inserted into the first long holes 11. The second straightening roller 7 includes a first roller body 13 and a second roller body 14. The first roller body 13 is vertically movably arranged above the second roller body 14. The third straightening roller 8 includes two third roller bodies 15 and fourth roller bodies 16. The third roller body 15 is vertically movably arranged above the fourth roller body 16. Second motors are respectively fixedly arranged on the front and rear outer walls of the workbench 49. The rotating shafts of the second motors pass through the outer walls of the support table and are fixedly connected to the rotating triangular boxes 5 on the front and rear sides, driving the rotating triangular boxes 5 on the front and rear sides to rotate counterclockwise or clockwise inside the workbench 49.

[0049] The rotating triangular box 5 is in the shape of an equilateral triangle. The rotating triangular box 5 rotates clockwise or counterclockwise within the workbench 49, and the rotation angle is less than or equal to 180°. When the second straightening roller 7 or the third straightening roller 8 rotates to the top position of the workbench 49, the metal sheet passes through the middle of the second straightening roller 7 or the third straightening roller 8. The second straightening roller 7 and the third straightening roller 8 are both located at the top of the workbench 49 and are in the same horizontal plane. The metal sheet passes through the middle of the second straightening roller 7 and the third straightening roller 8 in sequence. When the first straightening roller 6 is located at the top of the workbench 49, the metal sheet passes through the middle of the second straightening roller 7, the top of the first straightening roller 6, and the middle of the third straightening roller 8 in sequence. The rotation angle of the rotating triangular box 5 is less than or equal to 180°, that is, the limit position of the rotating triangular box 5 is when the second straightening roller 7 and the third straightening roller 8 are in the same horizontal plane; when the rotating triangular box 5 rotates at different angles, it corresponds to different working states:

[0050] 1. When the rotating triangular box 5 does not rotate, that is, the first straightening roller 6 is located at the exact top position of the workbench 49. At this time, the second straightening roller 7 and the third straightening roller 8 are respectively located on the left and right sides of the bottom of the first straightening roller 6. This state is used when the metal sheet has a folded part. One end of the metal sheet passes through the middle of the second straightening roller 7, winds down from the top of the first straightening roller 6, and then passes through the middle of the second straightening roller 7. When the metal sheet passes through the second straightening roller 7, the first roller body 13 rises on the top of the second roller body 14 (in this process, there are holes on the side wall of the triangular box, a screw rod passes through the holes, there is an opening on the side of the triangular box, the screw rod is fixed to both ends of the first roller body 13 and both ends of the first roller body 13 are located in the opening, a nut is threadedly connected to the screw rod, turning the nut downward, the screw rod moves upward in the hole, driving the first roller body 13 to rise. The subsequent downward process of the first roller body 13 is the opposite, the upward process of the third roller body 15 is the same, and the downward process of the third roller body 15 is the opposite). When the folded part of the metal sheet reaches the position of the first straightening roller 6, the first roller body 13 descends and clamps one end of the metal sheet with the second roller body 14, and the third roller body 15 descends and presses the other end of the metal sheet with the fourth roller body 16. The movable end of the first cylinder 12 drives the first straightening roller 6 to move upward in the first long hole 11. Through the upward movement of the first straightening roller 6, an upward acting force is brought to the metal sheet to stretch the folded part of the metal sheet;

[0051] 2. When the rotating triangular box 5 rotates clockwise or counterclockwise by 45°, the second straightening roller 7 or the third straightening roller 8 is in the same horizontal plane as the first straightening roller 6, and the bent metal sheet can be straightened. The bent metal sheet passes through the second straightening roller 7 or the third straightening roller 8. The first roller body 13 or the third roller body 15 descends to press the metal sheet. As the metal sheet is conveyed, the straightening process of the bent metal sheet is realized;

[0052] 3. When the rotating triangular box 5 rotates 90° clockwise or counterclockwise, the second straightening roller 7 or the third straightening roller 8 is located at the top of the workbench 49, and the bent metal sheet can be straightened. The bent metal sheet passes through the second straightening roller 7 or the third straightening roller 8, and the first roller body 13 or the third roller body 15 descends to press the metal sheet. With the conveyance of the metal sheet, the straightening process of the bent metal sheet is realized.

[0053] 4. When the rotating triangular box 5 rotates 180° clockwise or counterclockwise, the second straightening roller 7 and the third straightening roller 8 are in the same horizontal plane, that is, in the plane parallel to the upper surface of the workbench 49, and the bent metal sheet can be straightened. The bent metal sheet passes through the second straightening roller 7 and the third straightening roller 8 in sequence, and the first roller body 13 or the third roller body 15 descends to press the metal sheet. With the conveyance of the metal sheet, the straightening process of the bent metal sheet is realized. This straightening process presses the metal sheet doubly, and this state is also the optimal state for straightening the bent metal sheet.

[0054] The metal sheet rolled into a cylinder by the reel assembly 3 needs to be roundness-corrected. In this process, the manipulator 50 takes the metal sheet rolled into a cylinder from the reel assembly 3 and places it in the pressing and roundness-correcting assembly 4.

[0055] Second cylinders 17 are respectively and fixedly arranged on the front and rear sides at the right end of the workbench 49. An arc-shaped depression 18 is arranged on one side of each pressing block 9 opposite to the center of the workbench 49. The radian of the depression 18 is less than π / 6. The depressions 18 of the pressing blocks 9 on the front and rear sides are arranged oppositely, and the movable ends of the second cylinders 17 on the front and rear sides are respectively fixedly connected to the pressing blocks 9 on the front and rear sides.

[0056] A driving motor 19 is fixedly arranged in the workbench 49. A circular through hole 20 is formed on the surface of the workbench 49. A rotating disc 21 is fixedly arranged on the rotating shaft of the driving motor 19. The rotating disc 21 is rotatably arranged in the through hole 20. The rotating support member 10 includes a column 22 fixed on the top of the rotating disc 21. The diameter of the column 22 is smaller than the diameter of the rotating disc 21. A first movable sleeve 23 and a second movable sleeve 24 are sequentially sleeved on the surface of the column 22 from top to bottom. A plurality of uniformly distributed struts 25 are arranged along the circumferential direction on the outer side of the column 22. The struts 25 are vertically arranged and parallel to the column 22. The struts 25 are movably arranged on the outer side of the column 22. The connecting lines between each pair of struts 25 enclose a circle, and the diameter of the circle enclosed by the struts 25 becomes larger or smaller as the first movable sleeve 23 moves up and down.

[0057] Two sets of driving components 26 are arranged inside the vertical column 22. Each set of driving components 26 passes through the surface of the vertical column 22 and is fixedly connected to the first movable sleeve 23 and the second movable sleeve 24 respectively, driving the first movable sleeve 23 and the second movable sleeve 24 to move up and down on the surface of the vertical column 22. The first movable sleeve 23 and the second movable sleeve 24 move towards each other or away from each other, and they do not move in the same direction.

[0058] Second long holes 27 are respectively formed on both sides of the vertical column 22. The second long holes 27 on both sides are respectively located at both ends of the diameter of the vertical column 22. A support plate 28 is fixedly arranged inside the vertical column 22. Driving cylinders 29 are respectively fixedly arranged at the top and bottom of the support plate 28. The movable end of the top driving cylinder 29 is vertically and fixedly provided with a first connecting rod 30. Both ends of the first connecting rod 30 are movably arranged in the second long holes 27, and both ends of the first connecting rod 30 are fixedly connected to the first movable sleeve 23. The movable end of the bottom driving cylinder 29 is vertically and fixedly provided with a second connecting rod 31. Both ends of the second connecting rod 31 are movably arranged in the second long holes 27, and both ends of the second connecting rod 31 are fixedly connected to the second movable sleeve 24.

[0059] On the upper and lower parts of the opposite side of each support rod 25 and the vertical column 22, a first movable rod 32 and a second movable rod 33 are respectively hinged. The bottom of the first movable rod 32 is hinged to the second movable sleeve 24. The top of the second movable rod 33 is hinged to the first movable sleeve 23. The middle part of the first movable rod 32 is hinged to the middle part of the second movable sleeve 24.

[0060] When it is necessary to round a metal sheet rolled into a cylinder, the cylinder is placed at the rotating support member 10, that is, the cylinder is sleeved outside the support rod 25. Subsequently, the front and rear pressing blocks 9 move relative to each other on the workbench 49 to a position where they contact the surface of the cylinder. At the same time, the two driving cylinders 29 in the column 22 act and their movable ends retract, driving the first connecting rod 30 to move downward in the second long slot 27 and driving the second connecting rod 31 to move upward in the second long slot 27. As the first connecting rod 30 and the second connecting rod 31 descend and ascend, the first movable sleeve 23 is driven to descend and the second movable sleeve 24 is driven to ascend. The end of the first movable rod 32 connected to the support rod 25 and the end of the second movable rod 33 connected to the support rod 25 approach each other. The connection between the first movable rod 32 and the second movable sleeve 24 approaches the connection between the second movable rod 33 and the first sleeve. The middle parts of the first movable rod 32 and the second movable rod 33 rotate, spreading the support rod 25 outside the column 22. The diameter of the circle formed by the connection lines between each support rod 25 gradually increases until the support rod 25 contacts the inner surface of the cylinder. At this time, since the front and rear pressing blocks 9 press the outer surface of the cylinder, as the driving motor 19 rotates to drive the disc to rotate, the disc rotation drives the column 22 to rotate, and the column 22 rotation drives the entire rotating support member 10 to rotate inside the cylinder. Since the support rod 25 makes a circular motion inside the cylinder, the surface of the support rod 25 is in full contact with the inner surface of the cylinder. As the support rod 25 continuously rotates, the depression 18 on the surface of the cylinder is spread open, realizing the rounding process.

[0061] Above the left part of the workbench 49, a housing 34 is fixedly arranged. The right end of the housing 34 is fixedly provided with a first fixing plate 35. An arc-shaped groove 36 is provided in the front side of the fixing plate workbench 49. A second fixing plate 37 is fixedly arranged at the rear side of the workbench 49. The first fixing plate 35 is fixedly connected to the second fixing plate 37. The cutting assembly 2 includes a second cutting knife 39 fixedly arranged on the surface of the workbench 49. The bottom of the first fixing plate 35 is provided with a first cutting knife 38 that can be lifted and lowered. The first cutting knife 38 is located directly above the second cutting knife 39. The top of the first fixing plate 35 is fixedly provided with a third air cylinder 40. The movable end of the third air cylinder 40 passes through the first fixing plate 35 and is fixedly connected to the first cutting knife 38.

[0062] A third fixing plate 41 is fixedly arranged at the bottom of the first fixing plate 35 and the front side of the second fixing plate 37. A fourth fixing plate 42 is fixedly arranged at the bottom of the front side of the first fixing plate 35. A first curling roller 43 is arranged between the fourth fixing plate 42 and the third fixing plate 41. A fifth fixing plate 44 is movably arranged below the fourth fixing plate 42. A second curling roller 45 is fixedly arranged between the fifth fixing plate 44 and the third fixing plate 41. A hydraulic cylinder 46 is fixedly arranged at the top of the first fixing plate 35. A lifting rod 47 is fixedly arranged on the movable end of the hydraulic cylinder 46. A jack 48 is provided at the top of the fifth fixing plate 44. The bottom of the lifting rod 47 is movably arranged in the jack 48.

[0063] The metal sheet stretched by the stretching and straightening assembly 1 passes between the first cutter 38 and the second cutter 39 and enters into the first rolling roller 43 and the second rolling roller 45. Two motors are fixedly arranged at the rear side of the second fixing plate 37. The rotating shafts of the two motors respectively pass through the second fixing plate 37 and the third fixing plate 41 and are fixedly connected to the second rolling roller 45 and the first rolling roller 43. The other end of the second rolling roller 45 is fixed to the third fixing plate 41. The two motors respectively drive the first rolling roller 43 and the second rolling roller 45 to rotate in opposite directions, and roll the metal sheet entering between the first rolling roller 43 and the second rolling roller 45. During the rolling process, the movable end of the hydraulic cylinder 46 on the first fixing plate 35 drives the lifting rod 47 to insert into the jack 48, realizing the fixation between the first fixing plate 35 and the fifth fixing plate 44. The metal sheet passes out between the first rolling roller 43 and the second rolling roller 45 and is bent downward into a cylinder. At this time, the third cylinder 40 drives the first cutter 38 to approach the second cutter 39 to cut off the redundant part of the metal sheet. After the metal sheet is rolled into a circle, the movable end of the hydraulic cylinder 46 contracts to drive the movable rod to withdraw from the jack 48, and the manipulator 50 takes out the metal sheet rolled into a cylinder from the front side between the first rolling roller 43 and the second rolling roller 45 and from the arc-shaped groove 36 and then puts it into the pressing and rounding assembly 4 for pressing and rounding.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A straightening and rounding mechanism is provided on a workbench, characterized in that, Including: A stretching and straightening component, rotatably arranged in the workbench, for stretching and straightening the metal sheet entering the workbench; A cutting component and a winding drum component, for cutting and winding the metal sheet stretched by the stretching component; A pressing and rounding component, for rounding the wound metal sheet; The stretching and straightening component includes two rotation triangular boxes symmetrically arranged front and back. Between each corner of the two rotation triangular boxes front and back, a first straightening roller, a second straightening roller, and a third straightening roller are respectively arranged. The first straightening roller is arranged to be liftable between the two rotation triangular boxes. The limit position where the first straightening roller descends is not lower than the height where the center position of the rotation triangular box is located. The first straightening roller and the second straightening roller or the third straightening roller do not simultaneously locate at the top of the workbench; The pressing and rounding component includes pressing blocks symmetrically and movably arranged on the front and back sides of the workbench. A circular rotation support component is movably arranged between the pressing blocks on the front and back sides. The outer diameter of the rotation support component increases and decreases in the opposite direction as the distance between the two pressing blocks changes; Each rotation triangular box is respectively provided with a first long hole. Each rotation triangular box is respectively fixedly provided with a first air cylinder. The two ends of the first straightening roller are respectively fixedly connected to the movable ends of the first air cylinder and inserted into the first long hole. The second straightening roller includes a first roller body and a second roller body. The first roller body is arranged to be liftable above the second roller body. The third straightening roller includes two third roller bodies and a fourth roller body. The third roller body is arranged to be liftable above the fourth roller body; The rotation triangular box is in an equilateral triangle shape. The rotation triangular box rotates clockwise or counterclockwise within the workbench and the rotation angle is less than or equal to 180°. When the second straightening roller or the third straightening roller rotates to the top position of the workbench, the metal sheet passes through the middle of the second straightening roller or the third straightening roller. When the second straightening roller and the third straightening roller are simultaneously located at the top of the workbench and the second straightening roller and the third straightening roller are in the same horizontal plane, the metal sheet passes through the middle of the second straightening roller and the third straightening roller in sequence. When the first straightening roller is located at the top of the workbench, the metal sheet passes through the middle of the second straightening roller, the top of the first straightening roller, and the middle of the third straightening roller in sequence.

2. The straightening and rounding mechanism according to claim 1, characterized in that, Second air cylinders are respectively fixedly arranged on the front and back sides at the right end of the workbench. An arc-shaped depression is arranged on one side of each pressing block opposite to the center of the workbench. The radian of the depression is less than π / 6. The depressions of the pressing blocks on the front and back sides are arranged oppositely. The movable ends of the second air cylinders on the front and back sides are respectively fixedly connected to the pressing blocks on the front and back sides.

3. The straightening and rounding mechanism according to claim 1, characterized in that, A driving motor is fixedly arranged inside the workbench. A circular through-hole is formed on the surface of the workbench. A rotating disc is fixedly arranged on the rotating shaft of the driving motor. The rotating disc is rotatably arranged in the through-hole. The rotating support member includes a column fixed on the top of the rotating disc. The diameter of the column is smaller than that of the rotating disc. A first movable sleeve and a second movable sleeve are sequentially sleeved on the surface of the column from top to bottom. A plurality of uniformly distributed struts are arranged on the outer side of the column along its circumferential direction. The struts are vertically arranged and parallel to the column. The struts are movably arranged on the outer side of the column. The connection lines between each pair of struts enclose a circle. The diameter of the circle enclosed by the struts becomes larger or smaller as the first movable sleeve moves up and down.

4. The straightening and rounding mechanism according to claim 3, characterized in that, Two sets of driving components are arranged inside the column. Each set of driving components passes through the surface of the column and is respectively fixedly connected to the first movable sleeve and the second movable sleeve, driving the first movable sleeve and the second movable sleeve to move up and down on the surface of the column. The first movable sleeve and the second movable sleeve move towards each other or away from each other, and they do not move in the same direction.

5. The straightening and rounding mechanism according to claim 4, characterized in that, Second long slots are respectively formed on both sides of the column. The two second long slots are respectively located at both ends of the diameter of the column. A support plate is fixedly arranged inside the column. Driving cylinders are respectively fixedly arranged at the top and bottom of the support plate. The movable ends of the driving cylinders are vertically and fixedly provided with first connecting rods. The two ends of the first connecting rod are respectively movably arranged in the second long slots. Both ends of the first connecting rod are fixedly connected to the first movable sleeve. The movable end of the bottom driving cylinder is vertically and fixedly provided with a second connecting rod. The two ends of the second connecting rod are respectively movably arranged in the second long slots. Both ends of the second connecting rod are fixedly connected to the second movable sleeve.

6. The straightening and rounding mechanism according to claim 3, characterized in that, A first movable rod and a second movable rod are respectively hinged to the upper and lower parts of the opposite side of each strut and the column. The bottom of the first movable rod is hinged to the second movable sleeve. The top of the second movable rod is hinged to the first movable sleeve. The middle part of the first movable rod is hinged to the middle part of the second movable sleeve.

7. The straightening and rounding mechanism according to claim 1, characterized in that, A housing is fixedly arranged above the left part of the workbench. A first fixing plate is fixedly arranged at the right end of the housing. An arc-shaped groove is formed on the front side of the workbench. A second fixing plate is fixedly arranged at the rear side of the workbench. The first fixing plate is fixedly connected to the second fixing plate. The cutting component includes a second cutting knife fixedly arranged on the surface of the workbench. A first cutting knife is arranged at the bottom of the first fixing plate in a liftable manner. The first cutting knife is located directly above the second cutting knife. A third cylinder is fixedly arranged at the top of the first fixing plate. The movable end of the third cylinder passes through the first fixing plate and is fixedly connected to the first cutting knife.

8. The straightening and rounding mechanism according to claim 7, characterized in that, A third fixing plate is fixedly arranged at the bottom of the first fixing plate and the front side of the second fixing plate. A fourth fixing plate is fixedly arranged at the bottom of the front side of the first fixing plate. A first rolling roller is arranged between the fourth fixing plate and the third fixing plate. A fifth fixing plate is movably arranged below the fourth fixing plate. A second rolling roller is fixedly arranged between the fifth fixing plate and the third fixing plate. A hydraulic cylinder is fixedly arranged at the top of the first fixing plate. A lifting rod is fixedly arranged at the movable end of the hydraulic cylinder. A jack is formed at the top of the fifth fixing plate. The bottom of the lifting rod is movably arranged in the jack.

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