A bending device for the shell of a plate and shell air preheater

Abstract

The present invention belongs to the technical field of bending equipment and primarily relates to a bending device for the outer shell of a plate-shell air preheater, comprising a bending machine and an auxiliary bending mechanism. The auxiliary bending mechanism includes a movable member that is assembled and moved in a front-to-back direction, the movable member being provided with a mounting seat that is assembled and rotated about an axis extending in a vertical direction, the mounting seat being provided with a mounting member that is assembled and moved in a front-to-back direction, the mounting member being provided with a clamping unit that is assembled and rotated about an axis extending in a left-to-right direction, the clamping unit being used to clamp a bent plate to be processed and flip the bent plate over after stamping. The semi-automatic auxiliary bending mechanism can handle most of the manual labor, and workers only need to perform simple operations and monitoring. This reduces the workload and operation time of manual handling and operation, reduces labor intensity, improves the working environment, and increases overall production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of bending equipment, and mainly relates to a bending device for the shell of a plate-shell air preheater. Background Art

[0002] A plate-and-shell air preheater (P&S) is a device that recovers heat from flue gas to preheat air and reduce exhaust gas temperature. It primarily consists of heat transfer plates, channel units, a housing frame, and guide vanes. The heat transfer plates are the core components of the P&S air preheater and are typically stamped from cold-rolled sheet metal with a thickness of 1.2-1.5 mm and featuring triangular bends.

[0003] The heat transfer plate is bent using a bending device, such as a bending machine disclosed in Chinese patent application CN103624123B. The bending machine comprises a base, a lower bending die disposed on the base, an upper bending die disposed above the lower bending die, and two position adjustment mechanisms fixedly connected to the base. The position adjustment mechanisms comprise a support connected to the base, a vertically movable slider slidably connected to the support, an adjustment handle threadedly connected to the support for moving the slider, a platform support connected to the slider, and a waist-shaped hole disposed on the platform support perpendicular to the axis of the lower bending die. A processing platform is detachably connected to the platform support, and the position of the processing platform is adjustable along the axis of the waist-shaped hole.

[0004] In the prior art, when using a bending machine for bending, multiple workers are required to lift the heavy iron plate and place it on the bending machine for bending. Since each wavy bent part needs to be removed and turned over by a worker before the next wavy bent part can be bent, this is not only time-consuming and labor-intensive, but also affects efficiency. Summary of the Invention

[0005] The invention provides a bending device for the shell of a plate-shell air preheater, so as to solve the problem of time-consuming, labor-intensive and low efficiency when bending iron plates by a bending machine in the prior art.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] A bending device for a shell of a plate and shell air preheater, comprising a bending machine and an auxiliary bending mechanism, wherein the auxiliary bending mechanism comprises a movable member that is assembled and moved in a front-to-rear direction, the movable member being provided with a mounting seat that is assembled and rotated about an axis extending in a vertical direction, the mounting seat being provided with a mounting member that is assembled and moved in a vertical direction, the mounting member being provided with a clamping unit that is assembled and rotated about an axis extending in a left-to-right direction, the clamping unit being used to clamp a bent plate to be processed and to turn the bent plate over after stamping;

[0008] The moving member moves to drive the bent plate clamped by the clamping unit to move toward the bending machine, and the bending machine punches the first side of the bent plate;

[0009] The mounting seat rotates around the axis extending in the vertical direction to drive the bending plate to rotate horizontally 180°. At the same time, the clamping unit rotates around the axis extending in the left and right direction to drive the bending plate to flip over, so that the bending machine can stamp the second side of the bending plate.

[0010] It has the following beneficial effects: the semi-automatic auxiliary bending mechanism can undertake most of the physical labor, and workers only need to perform simple operations and monitoring, which reduces the workload and operation time of manual handling and operation, reduces labor intensity, improves the working environment, effectively reduces workers' fatigue and risk of work-related injuries, reduces operation time, and improves production rhythm. The efficient bending capacity can reduce the processing time and scrap rate of the bent plate, thereby improving overall production efficiency.

[0011] Furthermore, there are two mounting members, which are arranged at intervals on the mounting seat, and each mounting member is rotatably mounted with the clamping unit, the two clamping units are arranged opposite to each other, and the bending plate is arranged between the two clamping units.

[0012] The invention has the following beneficial effects: the two clamping units are clamped at opposite ends of the bending plate. By clamping at opposite ends of the bending plate, the position of the bending plate can be clearly defined to prevent it from lateral movement or offset during the bending process, which helps to ensure the accuracy of the starting position and angle of the bending, thereby improving the accuracy and consistency of the bending and ensuring that each bent plate can meet the same size and shape requirements;

[0013] Clamping at both ends can provide balanced support for the bent plate, making the force on the bent plate more uniform during the bending process. This can avoid deformation, distortion or local stress concentration of the bent plate caused by uneven support, help ensure the flatness and quality of the bent plate after bending, reduce the rebound phenomenon caused by uneven stress distribution, and improve the accuracy and stability of bending;

[0014] When bending a plate, the force applied by the clamping unit at both ends can effectively disperse the bending force to the entire plate, which helps prevent the plate from breaking, tearing or excessive deformation due to excessive local force near the bending point. Especially for thicker or higher-strength plates, dispersing the bending force can better protect the integrity of the plate, allowing it to withstand greater bending force without damage.

[0015] Clamping at both ends makes it easier for the operator to control the movement and posture of the bent plate during the bending process. When full manual operation is required, the operator can more accurately grasp the bending process and adjust the bending angle and force in time, thereby improving the convenience and controllability of the operation and reducing the scrap rate caused by operational errors.

[0016] Furthermore, the auxiliary bending mechanism includes a first driving assembly connected to the moving member to drive it to move in the front-rear direction;

[0017] The mounting seat is provided with two second drive assemblies, which are connected to the corresponding mounting members to drive them to move in the up and down directions;

[0018] Each of the mounting members is provided with a third drive assembly, the third drive assembly being connected to the clamping unit to drive the clamping unit to rotate around an axis extending in the left-right direction;

[0019] The first drive assembly controls the position of the moving part, the second drive assembly controls the position of the mounting part, and the third drive assembly controls the angle of the clamping unit to control the placement position and angle of the bent plate during stamping.

[0020] The following beneficial effects are achieved: multiple drive components can respectively accurately drive the position and angle of the bending plate to achieve more precise position adjustment. The coordinated operation of multiple drive components can more accurately position the bending plate to the required position, thereby improving the dimensional accuracy of the bending;

[0021] At the same time, multiple drive components can be flexibly configured and controlled according to the characteristics of the specific bending plate to meet the bending requirements of various complex shapes;

[0022] Multiple drive components can perform different actions at the same time to achieve parallel operation. During the bending process, some drive components can be responsible for adjusting the angle of the bending plate, while other drive components can be responsible for adjusting the position of the bending plate, thereby shortening the processing time of each bending plate and improving overall production efficiency.

[0023] Furthermore, a limit pin is provided on the mounting seat, and the limit pin passes through the mounting seat and is inserted into the movable part, so that the mounting seat can be fixed to the movable part through the limit pin when the bending plate is stamped. At the same time, the limit pin can be pulled out from the movable part when the bending plate is rotated, so that the mounting seat rotates relative to the movable part.

[0024] It has the following beneficial effects: the limit pin can limit the relative rotation between the mounting seat and the movable part. When bending, the rotation between the mounting seat and the movable part is limited by the limit pin. When the other side of the bending plate is stamped, the limit pin is pulled out to cause relative rotation between the mounting seat and the movable part, thereby facilitating the flipping of the bending plate and conveniently stamping the other side of the bending plate.

[0025] Furthermore, each of the clamping units includes a rotating part rotatably assembled on the mounting part, and the rotating part is provided with a positioning block and a support block that can move relative to the positioning block. When bending, the two opposite edge ends of the bending plate are installed between the support block and the positioning block on the corresponding side, and the support block moves to press the bending plate against the positioning block.

[0026] Furthermore, the rotating member is provided with an equidistant pitch-changing component, and the equidistant pitch-changing component is provided with a plurality of the positioning blocks. The equidistant pitch-changing component drives the plurality of positioning blocks to move at equal intervals. When the bending plate is installed, the positioning block is located between two adjacent bending parts of the bending plate.

[0027] The invention has the following beneficial effects: the equal-spacing variable-pitch components can adjust the spacing according to the bent plates of different sizes, and can adapt to bent plates of various specifications. Whether it is a narrow plate or a wide plate, it can achieve stable clamping by simply adjusting the equal-spacing variable-pitch components. There is no need to replace different clamping units for bent plates of different sizes, which improves the versatility of the clamping unit and the utilization rate of the equipment.

[0028] During bending, the equally spaced variable distance components can ensure that the clamping force on each part of the bent plate is consistent, avoiding deformation, twisting or local stress concentration of the bent plate due to uneven force, which helps to improve the bending quality, reduce the rebound phenomenon caused by stress problems, and make the bent plate meet high-precision quality requirements after bending.

[0029] Furthermore, each of the support blocks is elastically connected to a top block, and the top block is used to press one end of the bent plate.

[0030] Furthermore, a connecting rod is slidably assembled between the two top blocks.

[0031] Furthermore, the mounting seat is provided with two sliding seats with adjustable spacing, and the two second driving assemblies are provided on the corresponding sliding seats. The spacing between the two sliding seats is adjusted to adjust the spacing between the two clamping units.

[0032] The invention has the following beneficial effects: the interval between the clamping units can be flexibly adjusted according to the dimensional characteristics of the plate to be bent, such as the length, width or shape. For small-sized bent plates, the interval can be reduced to provide more accurate positioning and stable clamping; for large-sized bent plates, the interval can be increased to ensure that both ends of the bent plate can be effectively clamped, so that the same set of equipment can process bent plates of various specifications, improving the versatility and processing range of the equipment;

[0033] At the same time, because it can adapt to a variety of bent plate sizes and optimize the processing process, it reduces the cost of purchasing additional equipment due to the inability to meet different bent plate needs. At the same time, it improves processing efficiency and product quality, reduces scrap rate, and further reduces production costs and improves production efficiency.

[0034] Furthermore, the mounting seat is provided with a plurality of positioning holes arranged at intervals, and the sliding seat is provided with a positioning pin, which passes through the sliding seat and is inserted into the positioning hole on the mounting seat to fix the position of the sliding seat, thereby determining the interval between the two clamping units. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0036] Figure 1 This is a schematic structural diagram of the present invention in the first state when bent;

[0037] Figure 2 This is a schematic structural diagram of the second state of the present invention when bent;

[0038] Figure 3 for Figure 1 Right view;

[0039] Figure 4 It is a structural schematic diagram of the clamping unit clamping the bent plate;

[0040] Figure 5 It is a schematic structural diagram of the clamping unit from the first perspective;

[0041] Figure 6 It is a structural schematic diagram of the clamping unit clamping the second viewing angle;

[0042] Figure 7 It is a structural schematic diagram of the present invention;

[0043] Figure 8 for Figure 7 A top view of

[0044] Figure 9 for Figure 8 Cross-sectional view along the AA axis;

[0045] Figure 10 for Figure 9 Enlarged view of point B in the middle.

[0046] Description of reference numerals:

[0047] 1. Press brake; 2. First motor; 3. Screw; 4. Moving part; 5. Mounting seat; 6. Sliding seat; 7. Locating pin; 8. Locating hole; 9. Driving cylinder; 10. Second motor; 11. Mounting part; 12. Rotating part; 13. Locating block; 14. Bending plate; 15. Ejector block; 16. Limit pin; 17. Slide rail; 18. Support block; 19. Connecting rod; 20. Sliding rod; 21. Tension spring; 22. Pressing cylinder; 23. Bending part; 24. Equally spaced variable pitch assembly; 25. Guide rod. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0049] Various non-limiting embodiments of the present invention are described below. The numbers of any elements in the accompanying drawings are for illustrative purposes only and are not intended to be limiting, and any nomenclature is provided for distinction only and does not have any limiting meaning. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0050] like Figure 1-Figure 3 As shown, a bending device for the shell of a plate-and-shell air preheater comprises a bending machine 1 and an auxiliary bending mechanism. During bending, a bending plate 14 is placed on the auxiliary bending mechanism. The auxiliary bending mechanism replaces manual labor, reducing the number of manual handling operations required for the bending plate 14, lowering labor intensity, saving time and effort, and improving work efficiency. In this embodiment, the bending machine 1 is conventional technology and will not be described in detail.

[0051] In this embodiment, Figure 1-Figure 3As shown, the auxiliary bending mechanism includes a movable member 4 that is movable in the front-to-back direction. The movable member 4 can move closer to or further away from the bending machine 1, and the distance between the bending plate 14 and the bending machine 1 can be changed by the movable member 4. A rotating hole is provided in the middle of the movable member 4, and a rotating shaft is rotatably assembled in the rotating hole. The axis of the rotating shaft extends in the vertical direction, and the rotating shaft is connected to a mounting base 5. In this embodiment, the mounting base 5 and the rotating shaft are integrally formed.

[0052] A worker manually pushes the mounting base 5, causing it to rotate horizontally on the movable member 4 via the rotation axis. Mounting base 5 is provided with a mounting member 11, which is movable in the vertical direction. Mounting member 11 is provided with a clamping unit, and the vertical movement of mounting member 11 adjusts the height of the clamping unit. The clamping unit is rotatable on mounting member 11 about an axis extending in the left-right direction. The clamping unit is used to clamp the bent plate 14 to be processed and flip the bent plate 14 after stamping.

[0053] During bending, the clamping unit holds the bending plate 14, and the movable member 4 moves, driving the bent plate 14 held by the clamping unit toward the bending machine 1, causing the bending machine 1 to stamp the first side of the bent plate 14. The movable member 4 then moves, carrying the bent plate 14 away from the bending machine 1. The mounting base 5 then rotates the bent plate 14 horizontally 180° via the rotating shaft. Simultaneously, the clamping unit rotates about its axis extending horizontally to flip the bent plate 14 over, causing the bending machine 1 to stamp the second side of the bent plate 14. The above steps can then be repeated.

[0054] In this embodiment, after a bending plate 14 completes a portion of the bending, a worker needs to manually replace the bending plate 14, that is, to replace the bent portion with the unbent portion. In other words, the clamping unit initially clamps the unbent portion of the bending plate 14, and later needs to replace the clamping portion that has been bent.

[0055] In this embodiment, the semi-automatic auxiliary bending mechanism can undertake most of the physical labor, and workers only need to perform simple operations and monitoring, which reduces the workload and operation time of manual handling and operation, reduces labor intensity, and improves the working environment. This is especially important for long-term, high-intensity bending processing tasks. It can effectively reduce workers' fatigue and work-related injury risks, reduce operation time, and improve production rhythm. The efficient bending capacity and stable performance can reduce the processing time and scrap rate of the bent plate 14, thereby improving overall production efficiency.

[0056] The auxiliary bending mechanism ensures that the bending plate 14 maintains the correct position and posture during the bending process, reduces the bending deviation caused by human factors or the precision error of the machine tool itself, and thus improves the accuracy of the bending angle and size.

[0057] In this embodiment, Figure 1-Figure 3 As shown, there are two mounting members 11, which are spaced apart and arranged on the mounting seat 5. The above-mentioned clamping unit is rotatably mounted on each mounting member 11, and the two clamping units are arranged opposite to each other, and the bending plate 14 is arranged between the two clamping units.

[0058] The two clamping units are clamped at the opposite ends of the bending plate 14. By clamping at the opposite ends of the bending plate 14, the position of the bending plate 14 can be clearly defined to prevent it from moving laterally or offsetting during the bending process. This helps to ensure the accuracy of the starting position and angle of the bending, thereby improving the accuracy and consistency of the bending, and ensuring that each bending plate 14 can meet the same size and shape requirements.

[0059] In addition, the clamping at both ends can provide balanced support force for the bending plate 14, so that the force exerted on the bending plate 14 during the bending process is more uniform, which can avoid deformation, twisting or local stress concentration of the bending plate 14 caused by uneven support, and help to ensure the flatness and quality of the bending plate 14 after bending, reduce the rebound phenomenon caused by uneven stress distribution, and improve the accuracy and stability of bending.

[0060] Moreover, when the bending plate 14 is bent, the force applied by the clamping unit at both ends can effectively disperse the bending force to the entire bending plate 14, which helps to prevent the bending plate 14 from breaking, tearing or excessive deformation due to excessive local force near the bending point. Especially for thicker or stronger bending plates 14, dispersing the bending force can better protect the integrity of the bending plate 14, allowing it to withstand greater bending force without damage.

[0061] At the same time, clamping at both ends makes it easier for the operator to control the movement and posture of the bending plate 14 during the bending process. When full manual operation is required, the operator can more accurately grasp the bending process, adjust the bending angle and force in time, improve the convenience and controllability of the operation, and reduce the scrap rate caused by operational errors.

[0062] In this embodiment, Figure 1-Figure 3 As shown, the auxiliary bending mechanism includes a first drive assembly, which is connected to a moving member 4 to drive it to move in the front-to-back direction. In this embodiment, the first drive assembly includes a first motor 2 and a screw rod 3 drivingly connected to the first motor 2. The moving member 4 is threadedly connected to the screw rod 3. When the first motor 2 is operated, the screw rod 3 is driven to rotate, thereby moving the moving member 4 along the extension direction of the screw rod 3.

[0063] Two second drive assemblies are provided on the mounting base 5, and the second drive assemblies are connected to corresponding mounting members 11 to drive the mounting base 5 in the vertical direction. In this embodiment, the second drive assemblies include a drive cylinder 9, the fixed end of which is provided on the mounting base 5, and the telescopic end of which is connected to the mounting member 11 to drive the mounting base 5 in the vertical direction.

[0064] Each mounting member 11 is provided with a third drive assembly that is connected to the clamping unit to drive the clamping unit to rotate about an axis extending in the left-right direction. In this embodiment, the third drive assembly includes a second motor 10, which is provided on the mounting member 11 and is connected to the clamping unit to drive the clamping unit to rotate.

[0065] The first drive assembly controls the position of the moving member 4, the second drive assembly controls the position of the mounting member 11, and the third drive assembly controls the angle of the clamping unit to control the placement position and angle of the bent plate 14 during stamping.

[0066] Multiple drive components can respectively accurately drive the position and angle of the bending plate 14 to achieve more precise position adjustment. The coordinated operation of multiple drive components can more accurately position the bending plate 14 to the desired position, thereby improving the dimensional accuracy of the bending.

[0067] At the same time, multiple drive components can be flexibly configured and controlled according to the characteristics of the specific bending plate 14 to adapt to the bending requirements of various complex shapes.

[0068] In this embodiment, multiple drive components can perform different actions at the same time to achieve parallel operation. During the bending process, some drive components can be responsible for adjusting the angle of the bending plate 14, while other drive components can be responsible for adjusting the position of the bending plate 14, thereby shortening the processing time of each bending plate 14 and improving overall production efficiency.

[0069] In this embodiment, Figure 1-Figure 3 As shown, a limit pin 16 is provided on the mounting seat 5, and the limit pin 16 passes through the mounting seat 5 and is inserted into the movable part 4, so that the mounting seat 5 can be fixed on the movable part 4 through the limit pin 16 when the bending plate 14 is stamped. At the same time, the limit pin 16 can be manually pulled out from the movable part 4 when the bending plate 14 rotates, so that the mounting seat 5 can rotate relative to the movable part 4.

[0070] The limit pin 16 can limit the relative rotation between the mounting seat 5 and the movable part 4. When bending, the limit pin 16 limits the rotation between the mounting seat 5 and the movable part 4. When stamping the other side of the bending plate 14, the limit pin 16 is pulled out and the mounting seat 5 is manually pushed to cause relative rotation between the mounting seat 5 and the movable part 4, thereby facilitating the flipping of the bending plate 14 and conveniently stamping the other side of the bending plate 14.

[0071] In this embodiment, Figure 1-Figure 3 As shown, each clamping unit includes a rotating member 12 rotatably mounted on a mounting member 11. This rotating member 12 is in driving connection with a second motor 10. Operation of the second motor 10 drives the rotating member 12 to rotate. Rotating member 12 is provided with a positioning block 13 and a support block 18 that is movable relative to the positioning block 13. Rotating member 12 is also provided with a pressure cylinder 22, which is connected to the support block 18 to drive its movement relative to the positioning block 13. A guide rod 25 is fixed to rotating member 12 and slides through the support block 18. Two guide rods 25 are provided, one on each opposite side of the pressure cylinder 22.

[0072] When bending, the two opposite edge ends of the bending plate 14 are installed between the support block 18 and the positioning block 13 on the corresponding side. The support block 18 moves to press the bending plate 14 against the positioning block 13, thereby clamping and fixing the bending plate 14.

[0073] In this embodiment, Figure 4-Figure 6 As shown, the rotating member 12 is equipped with an evenly spaced pitch-changing assembly 24, which is equipped with multiple positioning blocks 13 as described above. The evenly spaced pitch-changing assembly 24 drives the multiple positioning blocks 13 to move at equal intervals, that is, the spacing between any two adjacent positioning blocks 13 is the same. When installing the bending plate 14, if the clamping unit clamps the bending plate 14 at a portion that has already been bent, the positioning block 13 can be positioned between two adjacent bent portions 23 of the bending plate 14. In this embodiment, the number of positioning blocks 13 can be determined based on actual conditions.

[0074] The equally spaced variable pitch component 24 can adjust the spacing according to the bending plates 14 of different sizes, and can adapt to bending plates 14 of various specifications. No matter whether it is a narrow plate or a wide plate, it is only necessary to adjust the equally spaced variable pitch component 24 to achieve stable clamping. There is no need to replace different clamping units for bending plates 14 of different sizes, which improves the versatility of the clamping unit and the utilization rate of the equipment.

[0075] During bending, the equally spaced variable distance assembly 24 can ensure that the clamping force on each part of the bending plate 14 is consistent, avoiding deformation, twisting or local stress concentration of the bending plate 14 due to uneven force, which helps to improve the bending quality and reduce the rebound phenomenon caused by stress problems, so that the bent plate 14 meets high-precision quality requirements after bending.

[0076] like Figures 8-10As shown, each support block 18 is connected to a tension spring 21, which is connected to a top block 15 via a sliding rod 20. When the clamping unit clamps the bending plate 14, the top block 15 presses one end of the bending plate 14, while the other end of the bending plate 14 is used for bending. As the bending continues, the distance between the top block 15 and the support block 18 can be changed, so that the bending plate 14 is always supported.

[0077] In this embodiment, Figure 7 、 Figure 8 As shown, the mounting base 5 is provided with two sliding bases 6 with adjustable spacing. Specifically, a slide rail 17 is fixed to the mounting base 5, and the two sliding bases 6 are slidably assembled on the slide rail 17. Two driving cylinders 9 are provided on the corresponding sliding bases 6. By adjusting the spacing between the two sliding bases 6, the spacing between the two clamping units can be adjusted to accommodate bending plates 14 of different specifications and sizes.

[0078] In this embodiment, the spacing of the clamping units can be flexibly adjusted according to the dimensional characteristics of the plate 14 to be bent, such as the length, width or shape. For small-sized bent plates 14, the spacing can be reduced to provide more accurate positioning and stable clamping; for large-sized bent plates 14, the spacing can be increased to ensure that both ends of the bent plate 14 can be effectively clamped, so that the same set of equipment can process bent plates 14 of various specifications, thereby improving the versatility and processing range of the equipment.

[0079] At the same time, since it can adapt to various sizes of bending plates 14 and optimize the processing process, it reduces the cost of purchasing additional equipment due to the inability to meet the needs of different bending plates 14. At the same time, it improves processing efficiency and product quality, reduces the scrap rate, and further reduces production costs and improves production benefits.

[0080] In this embodiment, in order to increase the stability of the connection between the two clamping units, a connecting rod 19 is slidably mounted between the two top blocks 15 .

[0081] like Figure 7 、 Figure 8 As shown, the mounting base 5 is provided with a plurality of spaced positioning holes 8, and the sliding base 6 is provided with a positioning pin 7. The positioning pin 7 passes through the sliding base 6 and is inserted into the positioning holes 8 on the mounting base 5 to fix the position of the sliding base 6, thereby determining the spacing between the two clamping units. In this embodiment, the number of positioning holes 8 can be determined according to actual conditions.

[0082] In this embodiment, a controller can also be arranged to control the operation of the bending machine 1, the first motor 2, the second motor 10, and the driving cylinder 9. The controller sets the operating values of the bending machine 1, the first motor 2, the second motor 10, and the driving cylinder 9 for each bend to ensure that each bend meets the process requirements. The operation of the top pressure cylinder 22 can be controlled by a manual switch.

[0083] The present invention works as follows:

[0084] The distance between the two sliding seats 6 is adjusted to be suitable for the bending plate 14 of the corresponding specification size. After the bending plate 14 is clamped, the two sliding seats 6 are fixed to prevent them from sliding relative to each other.

[0085] The bending machine 1 is started to bend the bending plate 14. After the first side of the bending plate 14 is stamped, the limit pin 16 is opened to rotate the mounting base 5 180 degrees, and the limit pin 16 is then used to fix the mounting base 5. While the mounting base 5 is rotating, the second motor 10 can be started simultaneously to turn the bending plate 14 over. The bending plate 14 is then brought closer to the bending machine 1 to stamp the second side of the bending plate 14. The above process is repeated to complete the bending of the bending plate 14.

[0086] When a portion of the bending plate 14 is bent, the worker manually adjusts the clamping position of the bending plate 14 so that the bending machine 1 can bend the unbent portion.

Claims

1. A bending device for the shell of a plate and shell air preheater, characterized in that: The invention comprises a bending machine and an auxiliary bending mechanism, wherein the auxiliary bending mechanism comprises a moving member assembled and moved in the front-back direction, the moving member is provided with a mounting seat assembled and rotated around an axis extending in the up-down direction, the mounting seat is provided with a mounting member assembled and moved in the up-down direction, the mounting member is provided with a clamping unit assembled and rotated around an axis extending in the left-right direction, the clamping unit is used to clamp the bent plate to be processed and turn the bent plate over after stamping; The moving member moves to drive the bent plate clamped by the clamping unit to move toward the bending machine, and the bending machine punches the first side of the bent plate; The mounting seat rotates around the axis extending in the vertical direction to drive the bending plate to rotate horizontally 180 degrees. At the same time, the clamping unit rotates around the axis extending in the left and right direction to drive the bending plate to turn over, so that the bending machine can punch the second side of the bent plate. There are two mounting members, which are spaced apart and arranged on the mounting seat. The clamping unit is rotatably mounted on each mounting member. The two clamping units are arranged opposite to each other, and the bending plate is arranged between the two clamping units. Each of the clamping units includes a rotating member rotatably assembled on the mounting member, the rotating member is provided with a positioning block and a support block movable relative to the positioning block. When bending, the two opposite edge ends of the bending plate are mounted between the support block and the positioning block on the corresponding side, and the support block moves to press the bending plate against the positioning block. The rotating member is provided with an equidistant pitch-changing component, and the equidistant pitch-changing component is provided with a plurality of positioning blocks. The equidistant pitch-changing component drives the plurality of positioning blocks to move at equal intervals. When the bending plate is installed, the positioning block is located between two adjacent bending parts of the bending plate.

2. The bending device for the shell of a plate and shell type air preheater according to claim 1, characterized in that: The auxiliary bending mechanism includes a first driving assembly connected to the moving member to drive it to move in the front-rear direction; The mounting seat is provided with two second drive assemblies, which are connected to the corresponding mounting members to drive them to move in the up and down directions; Each of the mounting members is provided with a third drive assembly, the third drive assembly being connected to the clamping unit to drive the clamping unit to rotate around an axis extending in the left-right direction; The first drive assembly controls the position of the moving part, the second drive assembly controls the position of the mounting part, and the third drive assembly controls the angle of the clamping unit to control the placement position and angle of the bent plate during stamping.

3. The bending device for the shell of a plate and shell type air preheater according to claim 2, characterized in that: The mounting seat is provided with a limit pin, which passes through the mounting seat and is inserted into the moving part, so that the mounting seat can be fixed to the moving part through the limit pin when the bending plate is stamped. At the same time, the limit pin can be pulled out from the moving part when the bending plate is rotated, so that the mounting seat rotates relative to the moving part.

4. A bending device for a shell of a plate and shell type air preheater according to any one of claims 2 or 3, characterized in that: Each of the support blocks is elastically connected with a top block, and the top block is used to press one end of the bent plate.

5. The bending device for the shell of a plate and shell type air preheater according to claim 4, characterized in that: A connecting rod is slidably mounted between the two top blocks.

6. A bending device for a shell of a plate and shell air preheater according to any one of claims 2 or 3, characterized in that: The mounting seat is provided with two sliding seats with adjustable spacing, and the two second driving assemblies are provided on the corresponding sliding seats. The spacing between the two clamping units can be adjusted by adjusting the spacing between the two sliding seats.

7. The bending device for the shell of a plate and shell type air preheater according to claim 6, characterized in that: The mounting seat is provided with a plurality of positioning holes arranged at intervals, and the sliding seat is provided with a positioning pin, which passes through the sliding seat and is inserted into the positioning hole on the mounting seat to fix the position of the sliding seat, thereby determining the interval between the two clamping units.

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