A heating and ventilation duct bending and forming equipment

Abstract

The present invention relates to the technical field of bending equipment, and specifically to a heating and ventilation duct bending and forming equipment, comprising a bracket, a positioning mechanism and two bending rods. The two bending rods are both installed on the bracket, and the two bending rods can rotate relative to the bracket. The positioning mechanism includes a positioning block and four positioning rods, the positioning block is installed on the bracket, and the four positioning rods are evenly distributed on the positioning block. A heating and ventilation duct bending and forming equipment of the present invention is provided with a bracket, a positioning mechanism and two bending rods, and the bending rods are used to first deform the steel plate, and after the two bending rods are close to each other, the position of one of the inner corners is determined, and then the positioning rods are used to form the remaining three inner corners, and finally the steel plate is bent and formed at one time, thereby improving the bending efficiency, avoiding the problems existing in sequential bending, and thus improving the bending quality of the heating and ventilation duct.

Description

Technical Field

[0001] The invention relates to the technical field of bending equipment, and in particular to a heating and ventilation duct bending and forming equipment. Background Art

[0002] During the installation of the HVAC system, the production of HVAC ducts is a crucial step. After the horizontal steel plate is bent three times, a square duct with four inner corners is formed. The bending quality of the duct directly affects the assembly of the duct and the performance of the entire HVAC system.

[0003] During processing, the four corners of the duct need to be bent in sequence using a bending machine. However, the duct bending machines widely used in the market have some obvious limitations. First, from the perspective of efficiency, the process of bending the four corners in sequence is cumbersome and time-consuming, and each time a corner is bent, the equipment and duct need to be repositioned and adjusted. This series of operations seriously slows down the production speed and reduces work efficiency. Secondly, in the actual process of duct bending, this method of bending in sequence will also cause quality problems. After completing the bending of some corners, when bending the subsequent corners, due to the action of force and vibration during the operation of the equipment, the bent parts are prone to deformation. This deformation may be a change in angle, expansion and contraction of the side length, or local distortion at the bend. Once these deformations occur, great difficulties will be encountered in the subsequent duct assembly process. The deformed duct cannot be accurately docked with other duct components, which may lead to poor sealing at the interface, thereby affecting the air delivery efficiency and quality of the entire HVAC system. Moreover, in order to repair these deformation problems, additional labor and time costs are often required to correct the bent parts or remake the air duct, which further increases the production cost and production cycle. Summary of the invention

[0004] The present invention provides a heating and ventilation duct bending and forming device to solve the problem that the existing bending machine bends four corners in sequence, has low working efficiency, and in the subsequent turning process, the bent parts may be deformed, resulting in difficulty in assembling the duct.

[0005] A heating ventilation duct bending and forming device of the present invention adopts the following technical scheme: a heating ventilation duct bending and forming device, used for bending a steel plate into a heating ventilation duct, comprising a bracket, a positioning mechanism and two bending rods; the two bending rods are both installed on the bracket, and in the initial state, the two bending rods are both arranged along a first direction and are on the same plane, and the first direction is a horizontal direction; the two ends of the steel plate along the first direction are arranged one-to-one with the two bending rods, and the two ends of the steel plate along the first direction are respectively installed on the bending rods arranged accordingly, and the two bending rods can rotate relative to the bracket around a second direction, so that the two ends of the steel plate along the first direction are close to each other and the steel plate is used to enclose a positioning space, and the second direction is perpendicular to the first direction; the positioning mechanism is located in the positioning space, the positioning mechanism comprises a positioning block and four positioning rods, the positioning block is installed on the bracket, the four positioning rods are evenly distributed on the positioning block around the second direction, the four positioning rods can be extended and retracted along their own axes, and the gap formed after the two ends of the steel plate along the first direction are close to each other is called a splicing seam, and one of the positioning rods is perpendicular to the axis of the splicing seam in the second direction.

[0006] Furthermore, the bracket includes a frame body and a positioning beam, the positioning beam is arranged along the second direction, the positioning beam is fixedly arranged on the frame body, the two bending rods are symmetrically arranged about the central axis of the positioning beam in the second direction, and the two bending rods can rotate around the second direction relative to the positioning beam.

[0007] Furthermore, two driving members are provided on the bracket, and the two driving members are arranged in sequence on the frame along the second direction. The driving members include a first motor, and a first gear is provided at the output end of the first motor. The first gear can rotate around the second direction under the drive of the first motor; gear rings are provided on the two bending rods, and the gear rings are located at one end of the two bending rods close to each other in the first direction. The two gear rings are both rotatably matched with the positioning beam, and the two first gears are arranged one-to-one with the two gear rings, and each first gear is meshed with the gear ring corresponding to it.

[0008] Furthermore, the four positioning rods are all hydraulic telescopic rods.

[0009] Furthermore, the four positioning rods are two transverse rods and two longitudinal rods; the two transverse rods and the two longitudinal rods are arranged in sequence around the second direction on the positioning block, and the transverse rods and the longitudinal rods are alternately distributed in sequence around the second direction, the two transverse rods are arranged along the first direction, and the two longitudinal rods are arranged along the third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0010] Furthermore, the two longitudinal rods are respectively called the first longitudinal rod and the second longitudinal rod, the input end of the first longitudinal rod is installed on the positioning block, the output end of the first longitudinal rod is fixedly connected to the positioning beam, and the input end of the second longitudinal rod is installed on the positioning block.

[0011] Furthermore, the bracket also includes a limiting frame, which is fixedly connected to the frame body, and a limiting groove is provided on the limiting frame. The limiting groove is arranged along the third direction, and the positioning block is slidably installed in the limiting groove.

[0012] Furthermore, a clamp is provided on each of the two bending rods. In an initial state, the clamp is located at one end of the two bending rods that are away from each other in the first direction. A limit plate is provided on the clamp. The clamp and the corresponding limit plate are arranged side by side in a third direction. The limit plate can move relative to the clamp in the third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0013] Furthermore, the clamping plate and the corresponding limiting plate are connected via bolts, and a first elastic member is provided between the clamping plate and the corresponding limiting plate.

[0014] Furthermore, the clamping plate can rotate around a second direction relative to the corresponding bending rod.

[0015] The beneficial effects of the present invention are as follows: a heating and ventilation duct bending and forming device of the present invention is provided with a bracket, a positioning mechanism and two bending rods, and the bending rods are used to first deform the steel plate, and after the two bending rods are close to each other, the position of one of the inner corners is determined, and then the positioning rods are used to form the remaining three inner corners, and finally the steel plate is bent and formed in one time, thereby improving the bending efficiency, avoiding the problems existing in sequential bending, and thereby improving the bending quality of the heating and ventilation duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of a structure of a heating and ventilation duct bending and forming device according to an embodiment of the present invention before the bending rod is rotated;

[0018] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 A cross-sectional view of a structure of an embodiment of a heating and ventilation duct bending and forming device of the present invention before a bending rod is rotated;

[0020] Figure 4 It is a schematic diagram of a bending rod after rotation in a structure of an embodiment of a heating and ventilation duct bending and forming device of the present invention;

[0021] Figure 5It is a cross-sectional view of a structure of an embodiment of a heating and ventilation duct bending and forming device of the present invention after a bending rod is rotated;

[0022] Figure 6 for Figure 5 The enlarged view of point B in the middle;

[0023] Figure 7 It is a schematic diagram of another embodiment of a heating and ventilation duct bending and forming device of the present invention.

[0024] In the figure: 100, steel plate; 200, bracket; 210, frame; 211, first motor; 220, positioning beam; 230, limiting frame; 300, positioning mechanism; 310, positioning block; 320, transverse rod; 330, longitudinal rod; 331, first longitudinal rod; 332, second longitudinal rod; 400, bending rod; 410, clamping plate; 420, limiting plate; 430, boss; 440, movable clamping plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] An embodiment of a heating and ventilation duct bending and forming device of the present invention is as follows Figures 1 to 6 shown.

[0027] A heating duct bending and forming device is used to bend a steel plate 100 into a heating duct, comprising a bracket 200, a positioning mechanism 300 and two bending rods 400. The two bending rods 400 are both mounted on the bracket 200. In the initial state, the two bending rods 400 are both arranged along a first direction and on the same plane, and the first direction is a horizontal direction. Figure 1 As shown, the first direction is the direction shown by the X-axis.

[0028] The two ends of the steel plate 100 along the first direction are arranged in one-to-one correspondence with the two bending rods 400. The two ends of the steel plate 100 along the first direction are respectively installed on the corresponding bending rods 400. The two bending rods 400 can rotate around the second direction relative to the bracket 200, so that the two ends of the steel plate 100 along the first direction are close to each other and a positioning space is enclosed by the steel plate 100. The second direction is perpendicular to the first direction. Figure 2The second direction is the direction indicated by the Y axis. The positioning mechanism 300 is located in the positioning space, and the positioning mechanism 300 includes a positioning block 310 and four positioning rods. The positioning block 310 is installed on the bracket 200. The four positioning rods are evenly distributed around the second direction on the positioning block 310. The four positioning rods can be extended and retracted along their own axes. The gap formed by bringing the two ends of the steel plate 100 closer to each other in the first direction is called a splicing seam, and one of the positioning rods is perpendicular to the axis of the splicing seam in the second direction.

[0029] In this embodiment, a bracket 200, a positioning mechanism 300 and two bending rods 400 are provided. When bending, the two ends of the steel plate 100 to be bent along the first direction are respectively installed on the corresponding bending rods 400, and then the two bending rods 400 are respectively driven to rotate around the second direction. Figure 1 As shown, the bending rod 400 on the left side of the figure rotates counterclockwise around the second direction, and the bending rod 400 on the right side of the figure rotates clockwise around the second direction. The two bending rods 400 will approach each other after the rotation, and the rotation of the bending rod 400 will drive the ends of the steel plate 100 connected thereto to rotate, and make the two ends of the steel plate 100 approach each other, so that the steel plate 100 is deformed, and the deformed steel plate 100 can enclose the positioning mechanism 300 inside it, and then start the four positioning rods, so that the four positioning rods are respectively extended to the same length along their own axes and contact with the steel plate 100. Since the four positioning rods are evenly distributed on the positioning block 310 around the second direction, every two positioning rods adjacent to each other around the second direction are perpendicular to each other. After bending, a gap formed when the two ends of the steel plate 100 in the first direction approach each other will serve as one of the inner angles. Therefore, one of the positioning rods perpendicular to the axis of the joint seam in the second direction will support the inner angle and position the other three angles, so that each positioning rod can support one of the inner angles of the steel plate 100. Finally, the four inner angles of the steel plate 100 are supported by four positioning rods, and the steel plate 100 is first deformed by using the bending rod 400. After the two bending rods 400 approach each other, the position of one of the inner angles is determined, and then the positioning rod is used to shape the remaining three inner angles. Finally, the steel plate 100 is bent and formed at one time, which improves the bending efficiency, avoids the problems existing in sequential bending, and thus improves the bending quality of the HVAC duct.

[0030] In the embodiment, the bracket 200 includes a frame body 210 and a positioning beam 220, the positioning beam 220 is arranged along the second direction, the positioning beam 220 is fixedly arranged on the frame body 210, the two bending rods 400 are symmetrically arranged about the central axis of the positioning beam 220 in the second direction, and the two bending rods 400 can rotate around the second direction relative to the positioning beam 220. By setting the positioning beam 220 as a support point for bending the steel plate 100, the steel plate 100 is preliminarily positioned and supported.

[0031] Specifically, two driving members are arranged on the bracket 200, and the two driving members are arranged in sequence along the second direction on the frame body 210. The driving member includes a first motor 211, and a first gear is arranged at the output end of the first motor 211. The first gear can rotate around the second direction under the drive of the first motor 211. A gear ring is arranged on each of the two bending rods 400, and the gear ring is located at one end of the two bending rods 400 that is close to each other in the first direction. Both gear rings are rotatably matched with the positioning beam 220. The two first gears are arranged one-to-one with the two gear rings, and each first gear is meshed with the gear ring arranged correspondingly thereto, so that when the first motor 211 is started, the first gear can be driven to rotate, and the gear ring arranged correspondingly thereto can be driven to rotate through the first gear, so that the bending rod 400 can rotate around the second direction relative to the positioning beam 220.

[0032] Furthermore, the bending rod 400 is a spring telescopic rod, so that the bending rod 400 can adapt to different steel plates 100 .

[0033] In this embodiment, the four positioning rods are all hydraulic telescopic rods, so that each positioning rod can be telescoped by hydraulic drive, and each positioning rod can be telescoped along its own axis.

[0034] Specifically, the four positioning rods are two transverse rods 320 and two longitudinal rods 330. The two transverse rods 320 and the two longitudinal rods 330 are sequentially arranged around the second direction on the positioning block 310, and the transverse rods 320 and the longitudinal rods 330 are alternately distributed around the second direction. The two transverse rods 320 are arranged along the first direction, and the two longitudinal rods 330 are arranged along the third direction, which is perpendicular to the first direction and the second direction, respectively. See the attached Figure 1 As shown, the third direction is the direction shown by the Z axis. One of the longitudinal rods 330 is perpendicular to the axis of the joint seam along the second direction.

[0035] Furthermore, the two longitudinal rods 330 are respectively referred to as the first longitudinal rod 331 and the second longitudinal rod 332 , the input end of the first longitudinal rod 331 is mounted on the positioning block 310 , the output end of the first longitudinal rod 331 is fixedly connected to the positioning beam 220 , and the input end of the second longitudinal rod 332 is mounted on the positioning block 310 .

[0036] The bracket 200 further includes a limit frame 230, which is fixedly connected to the frame body 210. The limit frame 230 is provided with a limit slot, which is arranged along the third direction, and the positioning block 310 is slidably installed in the limit slot. The limit slot is used to limit the sliding direction of the positioning block 310, so that the positioning block 310 can only slide in the third direction.

[0037] By fixing the output end of the first longitudinal rod 331 to the positioning beam 220, since the positioning beam 220 is fixed to the frame 210, when the first longitudinal rod 331 is activated, the entire positioning block 310 will move along the third direction. This arrangement is because when the bending rod 400 drives the two ends of the steel plate 100 to bend, the two transverse rods 320 may not correspond to the inner corners to be positioned and formed on the steel plate 100, that is, the two transverse rods 320 are misaligned with the inner corners to be bent and formed on the steel plate 100 in the third direction, which will cause the two transverse rods 320 to slide relative to the steel plate 100 after being extended, which is easy to scratch the steel plate 100. Therefore, by making the first longitudinal rod 331 drive the entire positioning block 310 to move in the third direction, the positioning block 310 can drive the two transverse rods 320 to move, and by synchronously adjusting the first longitudinal rod 331 and the second longitudinal rod 332, the two transverse rods 320 and the inner angle of the steel plate 100 to be bent and formed are in the same plane in the third direction, so that the two transverse rods 320 and the steel plate 100 are kept in a relatively static state as much as possible to avoid scratching the steel plate 100. In order to finally bend the steel plate 100 into a square, it is only necessary to make the final extended lengths of the two transverse rods 320 and the two longitudinal rods 330 consistent.

[0038] In this embodiment, a clamp 410 is provided on each of the two bending rods 400. In the initial state, the clamp 410 is located at one end of the two bending rods 400 that is away from each other in the first direction. A limiting plate 420 is provided on the clamp 410. The clamp 410 and the corresponding limiting plate 420 are arranged side by side in the third direction, and the limiting plate 420 can move in the third direction relative to the clamp 410.

[0039] Specifically, the clamping plate 410 and the corresponding limiting plate 420 are connected by bolts, and a first elastic member is provided between the clamping plate 410 and the corresponding limiting plate 420, and the first elastic member is a spring.

[0040] Furthermore, the clamping plate 410 can rotate around the second direction relative to the corresponding bending rod 400. Specifically, the two bending rods 400 are each provided with a second motor, the output shaft of the second motor is provided with a second gear, the clamping plate 410 is provided with a rotating shaft, the rotating shaft and the bending rod 400 are rotationally matched, the rotating shaft is a gear shaft, the second gear is meshed with the gear shaft, and then when the second motor is started, the gear shaft can be driven to rotate through the second gear, so that the clamping plate 410 can rotate around the second direction relative to the corresponding bending rod 400.

[0041] In this embodiment, a clamping plate 410 is provided. When in use, the steel plate 100 is first clamped between the clamping plate 410 and the limiting plate 420, and the steel plate 100 is fixed by bolts, so that the bending rod 400 can subsequently drive one end of the corresponding steel plate 100 to rotate.

[0042] In the process that the two bending rods 400 drive one end of the corresponding steel plate 100 to rotate until the two steel plates 100 are close to each other, the second motor is started, so that the clamping plate 410 rotates around the second direction relative to the corresponding bending rod 400, see the attached Figure 4 To Attachment Figure 6 As shown, after the two ends of the steel plate 100 are close to each other, the two ends of the steel plate 100 can be butted together, which is convenient for subsequent welding processing.

[0043] In combination with the above embodiments, the specific working process is as follows:

[0044] When in use, the steel plate 100 is first clamped between the clamping plate 410 and the limit plate 420, and the steel plate 100 is fixed by bolts, and then the first motor 211 is started. The start of the first motor 211 can drive the first gear to rotate, and through the first gear, drive the corresponding gear ring to rotate, so that the bending rod 400 can rotate around the second direction relative to the positioning beam 220.

[0045] See attached Figure 1 As shown, the bending rod 400 on the left side of the figure is rotated counterclockwise around the second direction, and the bending rod 400 on the right side of the figure is rotated clockwise around the second direction. The two bending rods 400 will approach each other after the rotation, and the rotation of the bending rod 400 will drive the end of the steel plate 100 connected thereto to rotate, and make the two ends of the steel plate 100 approach each other, so that the steel plate 100 is deformed, and the deformed steel plate 100 can enclose the positioning mechanism 300 inside it.

[0046] Then, the two transverse rods 320 and the two longitudinal rods 330 are started. When the first longitudinal rod 331 is started, the entire positioning block 310 will move along the third direction. This arrangement is because when the bending rod 400 drives the two ends of the steel plate 100 to bend, the two transverse rods 320 may not correspond to the inner angles to be positioned and formed on the steel plate 100, that is, the two transverse rods 320 are misaligned with the inner angles to be bent and formed on the steel plate 100 in the third direction, which will cause the two transverse rods 320 to slide relative to the steel plate 100 after being extended, which is easy to scratch the steel plate 100. Therefore, by driving the entire positioning block 310 to move in the third direction through the first longitudinal rod 331, the two transverse rods 320 can be driven to move through the positioning block 310, and by synchronously adjusting the first longitudinal rod 331 and the second longitudinal rod 332, the two transverse rods 320 and the inner angle of the steel plate 100 to be bent and formed are in the same plane in the third direction, thereby ensuring that the two transverse rods 320 and the steel plate 100 are in a relatively static state as much as possible to avoid scratching the steel plate 100. In order to enable the steel plate 100 to be bent into a square in the end, it is only necessary to make the final extended lengths of the two transverse rods 320 and the two longitudinal rods 330 consistent. And in the process of the two bending rods 400 driving one end of the corresponding steel plate 100 to rotate until the two steel plates 100 are close to each other, the second motor is started, thereby causing the clamping plate 410 to rotate around the second direction relative to the corresponding bending rod 400, see the attached Figure 4 To Attachment Figure 6 As shown, after the two ends of the steel plate 100 are close to each other, the two ends of the steel plate 100 can be butted together, which is convenient for subsequent welding processing.

[0047] That is, when bending, the steel plate 100 is first deformed using the bending rod 400, and after the two bending rods 400 are close to each other, the position of one of the inner corners is determined, and then the positioning rod is used to shape the remaining three inner corners, and finally the steel plate 100 is bent and formed at one time, which improves the bending efficiency, avoids the problems existing in bending in sequence, and further improves the bending quality of the HVAC duct.

[0048] In another possible embodiment, see the attached Figure 7As shown, each limiting plate 420 is fixedly provided with a boss 430, and the boss 430 and the limiting plate 420 are an integrally formed structure. In the initial state, the bosses 430 on the two clamps 410 are away from each other in the first direction, and each limiting plate 420 is rotatably connected to a movable clamp 440 through a torsion spring, and the boss 430 has an inclined surface. In the initial state, the movable clamp 440 abuts against the inclined surface on the corresponding boss 430, thereby making the movable clamp 440 tilted, and the steel plate 100 overlaps on the movable clamp 440, and when the clamp 410 rotates relative to the corresponding bending rod 400, the two movable clamps 440 can abut and rotate around the second direction relative to the corresponding limiting plate 420, so that the steel plate 100 is bent.

[0049] By providing the movable clamping plate 440, subsequent welding or riveting operations are facilitated, and the connection strength and sealing of the connection are improved.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating and ventilation duct bending and forming device, used to bend steel plates into heating and ventilation ducts, characterized in that: It includes a bracket, a positioning mechanism and two bending rods; the two bending rods are installed on the bracket, and in the initial state, the two bending rods are arranged along a first direction and are on the same plane, and the first direction is a horizontal direction; the two ends of the steel plate along the first direction are arranged one by one with the two bending rods, and the two ends of the steel plate along the first direction are respectively installed on the bending rods arranged accordingly, and the two bending rods can rotate around the second direction relative to the bracket, so that the two ends of the steel plate along the first direction are close to each other and the steel plates are used to enclose a positioning space, and the second direction is perpendicular to the first direction; the positioning mechanism is located in the positioning space, the positioning mechanism includes a positioning block and four positioning rods, the positioning block is installed on the bracket, the four positioning rods are evenly distributed on the positioning block around the second direction, the four positioning rods can be extended and retracted along their own axes, and the gap formed when the two ends of the steel plate along the first direction are close to each other is called a splicing seam, and one of the positioning rods is perpendicular to the axis of the splicing seam in the second direction.

2. A heating and ventilation duct bending and forming equipment according to claim 1, characterized in that: The bracket includes a frame body and a positioning beam, the positioning beam is arranged along the second direction, the positioning beam is fixedly arranged on the frame body, the two bending rods are symmetrically arranged about the central axis of the positioning beam in the second direction, and the two bending rods can rotate around the second direction relative to the positioning beam.

3. A heating and ventilation duct bending and forming equipment according to claim 2, characterized in that: Two driving members are arranged on the bracket, and the two driving members are arranged in sequence on the frame along the second direction. The driving member includes a first motor, and a first gear is arranged at the output end of the first motor. The first gear can rotate around the second direction under the drive of the first motor; a gear ring is arranged on each of the two bending rods, and the gear ring is located at one end of the two bending rods close to each other in the first direction. The two gear rings are both rotatably matched with the positioning beam, and the two first gears are arranged one-to-one with the two gear rings, and each first gear is meshed with the gear ring corresponding to it.

4. A heating and ventilation duct bending and forming device according to claim 2, characterized in that: The four positioning rods are all hydraulic telescopic rods.

5. A heating and ventilation duct bending and forming device according to claim 4, characterized in that: The four positioning rods are two transverse rods and two longitudinal rods; the two transverse rods and the two longitudinal rods are arranged in sequence around the second direction on the positioning block, and the transverse rods and the longitudinal rods are alternately distributed in sequence around the second direction, the two transverse rods are arranged along the first direction, and the two longitudinal rods are arranged along the third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

6. A heating and ventilation duct bending and forming device according to claim 5, characterized in that: The two longitudinal rods are respectively called the first longitudinal rod and the second longitudinal rod. The input end of the first longitudinal rod is installed on the positioning block, the output end of the first longitudinal rod is fixedly connected to the positioning beam, and the input end of the second longitudinal rod is installed on the positioning block.

7. A heating and ventilation duct bending and forming device according to claim 6, characterized in that: The bracket also includes a limiting frame, which is fixedly connected to the frame body. A limiting groove is arranged on the limiting frame, the limiting groove is arranged along the third direction, and the positioning block is slidably installed in the limiting groove.

8. The heating and ventilation duct bending and forming equipment according to claim 1, characterized in that: A clamp is provided on each of the two bending rods. In an initial state, the clamp is located at one end of the two bending rods that are away from each other in the first direction. A limit plate is provided on the clamp. The clamp and the corresponding limit plate are arranged side by side in a third direction. The limit plate can move relative to the clamp in the third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

9. A heating and ventilation duct bending and forming device according to claim 8, characterized in that: The clamping plate and the corresponding limiting plate are connected through bolts, and a first elastic member is arranged between the clamping plate and the corresponding limiting plate.

10. The heating and ventilation duct bending and forming equipment according to claim 8, characterized in that: The clamping plate can rotate around the second direction relative to the corresponding bending rod.

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