Plate forming and bending device

Abstract

The invention discloses a plate forming and bending device which is characterized in that a driving assembly is arranged on a fixing frame, a transmission pipe assembly is rotatably arranged on the fixing frame, and the driving assembly can drive the transmission pipe assembly to rotate; a square bending sliding groove is formed in the fixing frame, and the pressing rod assembly is connected into the bending sliding groove in a sliding mode and connected with the transmission pipe assembly. The fixing pipe is fixedly arranged on the fixing frame, and the four sets of bend angle limiting assemblies are elastic and slidably arranged on the fixing pipe in a penetrating mode. The lower baffle is fixedly arranged on the fixed pipe; the lead screw assembly is rotatably arranged on the fixing frame, the pushing assembly is movably arranged on the lead screw assembly, and the pushing assembly can move along with rotation of the lead screw assembly, enables the bent angle limiting assemblies to slide towards the interior of the fixing pipe and drives the plate to slide outwards. The transmission pipe assembly can periodically drive the lead screw assembly to rotate, the lead screw assembly has elasticity and can reset after the transmission pipe assembly gets away from the lead screw assembly, and resetting of the pushing assembly can push the bend angle limiting assemblies to slide outwards.

Description

Technical Field

[0001] The invention belongs to the technical field of metal plate processing, and in particular relates to a plate forming and bending device. Background Art

[0002] As a common processing raw material, metal sheets are the basis for manufacturing various metal products. The processing process includes punching, cutting, drawing, bending, etc. Among them, bending of sheets is the most common, especially in the forming and manufacturing of square tubes. The forming process is often achieved by bending the sheets multiple times.

[0003] After multiple bendings, the formed sheet will be wrapped around the outside of the punch, and the rectangular steel plate needs to be manually removed from the outside of the punch. During this process, it is often necessary to slightly bend the formed sheet outward to make it fall off, which is rather troublesome. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a plate forming and bending device to solve the technical problem mentioned in the above background technology that the plate is not easy to fall off after being formed into a square tube.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes: A plate forming and bending device comprises a fixing frame, a driving assembly, a transmission tube assembly, a pressure rod assembly, a fixing tube, a bending angle limiting assembly, a lower baffle, a lead screw assembly and a pushing assembly; The driving assembly is arranged on the fixing frame, the transmission tube assembly is rotatably arranged on the fixing frame, and the driving assembly can drive the transmission tube assembly to rotate; a square bending slide groove is arranged on the fixing frame, the pressure rod assembly is slidably connected in the bending slide groove, and is connected to the transmission tube assembly; The fixed tube is fixed on the fixed frame, the angle limiting components are elastic and provided with four groups, and are respectively slidably penetrated on the fixed tube; the lower baffle is fixed on the fixed tube, and can clamp the plate together with the angle limiting components; The lead screw assembly is rotatably disposed on the fixed frame, the pushing assembly is movably disposed on the lead screw assembly, one end of which is passed through the fixed tube, the pushing assembly can move with the rotation of the lead screw assembly, and the movement of the pushing assembly can make each of the bending angle limiting assemblies slide into the fixed tube and drive the plate to slide outward; The transmission tube assembly can periodically drive the lead screw assembly to rotate. The lead screw assembly is elastic and can be reset after the transmission tube assembly moves away. The reset of the pushing assembly can push each of the bending angle limiting assemblies to slide outward.

[0006] Further, the screw assembly includes a screw connecting rod, a screw body, a screw baffle, a torsion spring and a driven plate; the screw connecting rod is coaxially fixed on both sides of the screw body, one of the screw connecting rods is rotatably connected to the fixed frame, and the other screw connecting rod is rotatably connected to one end of the fixed tube away from the fixed frame, the screw baffle is fixed on the screw connecting rod away from the fixed frame, and is connected to the fixed tube through the torsion spring; the fixed tube is provided with an arc-shaped push slide hole, one end of the driven plate is fixed on the screw connecting rod close to the fixed frame, and the other end extends outward through the push slide hole, the rotation of the transmission tube assembly can drive the driven plate to rotate, and the pushing assembly is movably arranged on the screw body. It should also be understood that the screw body, the screw connecting rod and the fixed tube are coaxial, and the screw baffle is preferably a circular plate.

[0007] Furthermore, the transmission tube assembly includes a transmission tube body, a gear ring, a connection frame and a pusher; the transmission tube body is rotatably connected to the fixed frame, the gear ring is coaxially fixed to the transmission tube body, and the driving assembly can drive the gear ring to rotate; the fixed frame is also provided with a push slide, one end of the pusher is slidably connected to the push slide, and the other end is slidably arranged in the connection frame, and the pusher can push the lead screw assembly. The setting of the long annular push slide can make the pusher periodically rotate the driven plate to a certain angle and then move away from the driven plate.

[0008] Furthermore, the pushing member includes a pushing slide bar, a pushing connecting rod and a pushing rod; the pushing slide bar is slidably connected to the connecting frame, a pushing connecting rod is rotatably provided on the top of the pushing slide bar, the pushing connecting rod is slidably connected to the connecting frame, the connecting frame is a square frame, and the pushing connecting rod is a square rod; the pushing rod is fixed on the pushing connecting rod and can push the screw assembly to rotate. Through this structural setting, it is possible to prevent the pushing rod from accidentally rotating when moving in the pushing slide slot, thereby affecting the pushing of the screw assembly.

[0009] Furthermore, the pushing assembly includes a ball bearing and a unloading push rod; the ball bearing is movably arranged on the screw, and a unloading slide hole is provided on the fixed tube. One end of the unloading push rod is fixed on the ball bearing, and the other end extends outward through the unloading slide hole. The unloading push rod can drive the plate to slide outward, and the ball bearing can push the angle limit assembly to slide outward.

[0010] Furthermore, the bending angle limit assembly includes a sliding rod, a bending limit plate, a bending connecting plate and a supporting spring; the sliding rod can be slidably inserted into the fixed tube, the bending limit plate is fixedly provided at one end of the sliding rod away from the fixed tube, the sliding rod is provided with an inclined surface at one end located in the fixed tube, and the pushing assembly can squeeze and push the inclined surface of the sliding rod to make the sliding rod slide outward; the bending connecting plate is fixedly provided at one end of the sliding rod located in the fixed tube, and is connected to the inner wall of the fixed tube through the supporting spring.

[0011] Furthermore, the pressure rod assembly includes a pressure rod connecting rod, a pressure rod body and a telescopic rod; the pressure rod connecting rod is slidably connected in the bending slide groove and is connected to the pressure rod body, and the pressure rod body is connected to the transmission tube assembly through the telescopic rod.

[0012] Furthermore, the driving assembly includes a motor and a driving gear; the motor is arranged on the fixing frame, and the driving gear is coaxially fixed on the output shaft of the motor and can drive the transmission tube assembly to rotate.

[0013] Furthermore, the angle limiting assembly is arranged obliquely toward the ground. With this structure, after the angle limiting assembly slides inward, the bent sheet can fall off relatively easily.

[0014] Compared with the prior art, the advantages of the present invention include: In the present application, the pressure rod assembly moves in a rectangular periodic shape under the drive of the transmission tube assembly, thereby bending the plate clamped in the lower baffle and the lower corner limiter along the side of each corner bending assembly. After completing the rectangular bending, the transmission tube assembly drives the screw assembly to rotate and then moves the pushing assembly, thereby causing each corner bending assembly to slide inward, and at the same time, the pushing assembly pushes the plate outward, thereby allowing the plate to fall off easily, and the bent state is maintained during the falling process without the need to bend the plate outward in order to peel the plate off from under the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is an overall schematic diagram of a plate forming and bending device in the present invention; Figure 2 It is a side schematic diagram of the plate forming and bending device in the present invention; Figure 3It is a side cross-sectional view of the plate forming and bending device in the present invention; Figure 4 It is an axial schematic diagram of a fixed tube of a plate forming and bending device in the present invention; Figure 5 for Figure 4 An enlarged schematic diagram of section A is shown; Figure 6 is a schematic diagram of a fixed tube in the present invention; Figure 7 is a schematic diagram of the corner limiting assembly in the present invention; Figure 8 It is a schematic diagram of the transmission tube assembly in the present invention.

[0017] Reference numerals: Fixed frame 1, bending slide groove 11, pushing slide groove 12, driving assembly 2, motor 21, driving gear 22, transmission tube assembly 3, transmission tube body 31, gear ring 32, connecting frame 33, pushing member 34, pushing slide rod 341, pushing connecting rod 342, pushing rod 343, pressure rod assembly 4, pressure rod connecting rod 41, pressure rod body 42, telescopic rod 43, fixed tube 5, pushing slide hole 51, unloading slide hole 52, bending angle limit assembly 6, sliding rod 61, bending limit plate 62, bending connecting plate 63, supporting spring 64, lower baffle 7, screw assembly 8, screw connecting rod 81, screw body 82, screw baffle 83, torsion spring 84, driven plate 85, pushing assembly 9, ball bearing 91, unloading push rod 92. DETAILED DESCRIPTION

[0018] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0019] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, the present invention covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present application, "first", "second", "third" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "an" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0021] In the description of the present application, the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, when positional terms such as both sides, outside, up and down are used, it should be understood that they are only used to facilitate understanding and description, considering that the structure may be facing other positions.

[0022] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with general skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] The embodiments of the present invention are intended to introduce and illustrate the structural composition of a sheet metal forming and bending device and the coordination relationship between the various components. Unless otherwise specified, the dimensions, materials and manufacturing processes of the various components in the sheet metal forming and bending device in the embodiments of the present invention can be selected according to specific circumstances and are not specifically limited or described herein.

[0024] Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the following detailed description of the present invention. For those skilled in the art, the present invention can be fully understood without the description of these details.

[0025] Please also read Figure 1-Figure 8The present embodiment provides a sheet forming and bending device, including a fixing frame 1, a driving assembly 2, a transmission tube assembly 3, a pressure rod assembly 4, a fixing tube 5, a bending angle limiting assembly 6, a lower baffle 7, a lead screw assembly 8 and a pushing assembly 9; The driving assembly 2 is arranged on the fixed frame 1, and the transmission tube assembly 3 is rotatably arranged on the fixed frame 1. The driving assembly 2 can drive the transmission tube assembly 3 to rotate; a square bending groove 11 is provided on the fixed frame 1, and the pressure rod assembly 4 is slidably connected in the bending groove 11 and is connected to the transmission tube assembly 3; it should be understood that the pressure rod assembly 4 continuously moves in the square bending groove 11 as the transmission tube assembly 3 rotates, and bends the plate.

[0026] The fixed tube 5 is fixed on the fixed frame 1, and the bending angle limiting components 6 are elastic and provided with four groups, and are respectively slidably penetrated on the fixed tube 5; the lower baffle 7 is fixed on the fixed tube 5, and can clamp the plate together with the bending angle limiting components 6; Specifically, the fixed tube 5 is coaxially located in the transmission tube assembly 3, and is closed at one end away from the fixed frame 1. The two corner stopper assemblies 6 on the lower side clamp the plate on the lower baffle, and the lower baffle 7 is an L-shaped plate. It should be understood that the four groups of corner stopper assemblies 6 together form a rectangular structure with an opening, and are respectively located at the four corners of the rectangle. Each corner stopper assembly 6 slides along the radial direction of the fixed tube 5, and each corner bending assembly applies a reverse force to the plate during the bending process of the pressure rod assembly 4, so that the plate is bent along the outer side of the bending assembly.

[0027] The lead screw assembly 8 is rotatably disposed on the fixed frame 1, and the push assembly 9 is movably disposed on the lead screw assembly 8, one end of which is penetrated on the fixed tube 5. The push assembly 9 can move with the rotation of the lead screw assembly 8. The movement of the push assembly 9 can make each bending angle limit assembly 6 slide into the fixed tube 5 and drive the plate to slide outward; Specifically, in the initial state, one end of each corner limit component 6 located in the fixed tube 5 abuts against the pushing component 9, and the elasticity of each corner limit component 6 is compressed to the limit, thereby fixing the height position of each corner limit component 6. When the pushing component 9 slides and moves away from the corner limit component 6, each corner limit component 6 slides inward under the action of the elastic force; a long hole with the same moving direction as the pushing component 9 is provided on the fixed tube 5, and one end of the pushing component 9 passes through the long hole and can push the plate outward as the pushing component 9 moves.

[0028] The transmission tube assembly 3 can periodically drive the lead screw assembly 8 to rotate. The lead screw assembly 8 is elastic and can be reset after the transmission tube assembly 3 moves away. The reset of the push assembly 9 can push each corner stop assembly 6 to slide outward. It should be understood that the reset sliding belt of the push assembly 9 squeezes each corner stop assembly 6 to move outward and re-presses the elasticity of each corner stop assembly 6. Specifically, after the transmission tube assembly 3 drives the pressure rod assembly 4 to move downward from the upper left corner, the transmission tube assembly 3 drives the lead screw assembly 8 to rotate, and gradually moves away from the lead screw assembly 8 after the lead screw assembly 8 rotates a certain angle, and then the lead screw assembly 8 is reset and rotated in the opposite direction due to its own elastic force.

[0029] In the present application, the pressure rod assembly 4 moves in a rectangular periodic shape driven by the transmission tube assembly 3, thereby bending the plate clamped in the lower baffle 7 and the lower corner limiter along the side of each corner bending assembly. After completing the rectangular bending, the transmission tube assembly 3 drives the screw assembly 8 to rotate and then moves the pushing assembly 9, so that each corner bending assembly slides inward, and at the same time, the pushing assembly 9 pushes the plate outward, thereby allowing the plate to fall off easily, and the bent state is maintained during the falling process without the need to bend the plate outward in order to peel the plate off from under the mold.

[0030] In other schemes, the screw assembly 8 includes a screw connecting rod 81, a screw body 82, a screw baffle 83, a torsion spring 84 and a driven plate 85; the screw connecting rod 81 is coaxially fixed on both sides of the screw body 82, one screw connecting rod 81 is rotatably connected to the fixed frame 1, and the other screw connecting rod 81 is rotatably connected to the end of the fixed tube 5 away from the fixed frame 1, the screw baffle 83 is fixed on the screw connecting rod 81 away from the fixed frame 1, and is connected to the fixed tube 5 through the torsion spring 84; the fixed tube 5 is provided with an arc-shaped pushing slide hole 51, one end of the driven plate 85 is fixed on the screw connecting rod 81 close to the fixed frame 1, and the other end extends outward through the pushing slide hole 51, the rotation of the transmission tube assembly 3 can drive the driven plate 85 to rotate, and the pushing assembly 9 is movably arranged on the screw body 82. Specifically, the push slide hole 51 is a long slide hole arranged along the circumference of the fixed tube 5, and the transmission tube assembly 3 gradually moves away from the driven plate 85 after driving the driven plate 85 to rotate. It should also be understood that the screw body 82, the screw connecting rod 81 and the fixed tube 5 are coaxial, and the screw baffle 83 is preferably a circular plate.

[0031] In other schemes, the transmission tube assembly 3 includes a transmission tube body 31, a gear ring 32, a connecting frame 33 and a pusher 34; the transmission tube body 31 is rotatably connected to the fixed frame 1, the gear ring 32 is coaxially fixed to the transmission tube body 31, and the driving assembly 2 can drive the gear ring 32 to rotate; the fixed frame 1 is also provided with a pushing slide 12, one end of the pusher 34 is slidably connected in the pushing slide 12, and the other end is slidably arranged in the connecting frame 33, and the pusher 34 can push the lead screw assembly 8. Specifically, the pusher 34 pushes the driven plate 85 of the lead screw assembly 8, and the pushing slide 12 is a long annular groove. When pushing the driven plate 85, the pusher 34 slides in its linear groove, and the axis of the lead screw connecting rod 81 is located at the center of the long annular groove. When sliding in the pushing slide 12, the pusher 34 slides in the connecting frame 33 along the trajectory of the pushing slide 12. The long annular push slide groove 12 can be provided to enable the push member 34 to periodically rotate the driven plate 85 to a certain angle and then move away from the driven plate 85 .

[0032] In other schemes, the push member 34 includes a push slide bar 341, a push link 342 and a push rod 343; the push slide bar 341 is slidably connected in the connection frame 33, the top of the push slide bar 341 is rotatably provided with a push link 342, the push link 342 is slidably connected in the connection frame 33, the connection frame 33 is a square frame, and the push link 342 is a square rod; the push rod 343 is fixed on the push link 342, and can push the screw assembly 8 to rotate. Specifically, the push rod 343 drives the driven plate 85 of the screw assembly 8 to rotate, and the opposite sides of the push link 342 are both against the two opposite inner side surfaces of the connection frame 33. Through this structural setting, it is possible to prevent the push rod 343 from accidentally rotating when moving in the push slide slot 12, thereby affecting the pushing of the screw assembly 8.

[0033] In other schemes, the pushing assembly 9 includes a ball bearing 91 and a discharge push rod 92; the ball bearing 91 is movably arranged on the lead screw, and a discharge slide hole 52 is arranged on the fixed tube 5. One end of the discharge push rod 92 is fixed on the ball bearing 91, and the other end passes through the discharge slide hole 52 and extends outward. The discharge push rod can drive the plate to slide outward, and the ball bearing 91 can push the bending angle limit assembly to slide outward. It should be understood that the ball bearing 91 is screwed on the lead screw, the discharge slide hole 52 is a long slide hole, the discharge push rod 92 is an L-shaped rod, and the two sides of the discharge push rod 92 abut against the two sides of the discharge slide hole 52. Through this structure, the displacement direction of the ball bearing 91 can be limited and guided.

[0034] In other schemes, the bending angle limit assembly includes a sliding rod 61, a bending limit plate 62, a bending connecting plate 63 and a supporting spring 64; the sliding rod 61 can be slidably penetrated on the fixed tube 5, and a bending limit plate 62 is fixedly provided at one end of the sliding rod 61 away from the fixed tube 5, and an inclined surface is provided at one end of the sliding rod 61 located in the fixed tube 5, and the pushing assembly 9 can squeeze and push the inclined surface of the sliding rod 61 to make the sliding rod 61 slide outward; the bending connecting plate 63 is fixedly provided at one end of the sliding rod 61 located in the fixed tube 5, and is connected to the inner wall of the fixed tube 5 through the supporting spring 64. Specifically, in the initial state, one end of the sliding rod 61 located in the fixed tube 5 abuts against the ball bearing 91, so that the support spring 64 is compressed to the maximum deformation, so that the position of the sliding rod 61 is fixed. After the ball bearing 91 slides, the sliding rod 61 loses the abutment of the ball bearing 91 and slides into the fixed tube 5 under the elastic force of the support spring 64, thereby reducing the rectangle formed by the bending limit plates 62 inwardly; when the ball bearing 91 moves in the opposite direction, the sliding energy of the ball bearing 91 of the push assembly 9 squeezes and drives the sliding rod 61 to slide, so that the rectangle formed by the bending limit plates 62 is expanded to the initial state again, and the support spring 64 is compressed to the maximum deformation. Preferably, the sliding rod 61 is also provided with a sliding baffle in the fixed tube 5. By setting the sliding baffle, the position of the sliding rod 61 sliding outward can be limited, thereby further limiting the bending limit plates 62 from sliding outward due to the influence of gravity.

[0035] In other embodiments, the pressure rod assembly 4 includes a pressure rod connecting rod 41, a pressure rod body 42 and a telescopic rod 43; the pressure rod connecting rod 41 is slidably connected in the bending slide groove 11 and connected to the pressure rod body 42, and the pressure rod body 42 is connected to the transmission tube assembly 3 through the telescopic rod 43. Specifically, the telescopic rod 43 is connected to the transmission tube body 31.

[0036] In other embodiments, the driving assembly 2 includes a motor 21 and a driving gear 22; the motor 21 is disposed on the fixing frame 1, and the driving gear 22 is coaxially fixed on the output shaft of the motor 21 and can drive the transmission tube assembly 3 to rotate. Specifically, the driving gear 22 is meshed with the gear ring 32.

[0037] In other solutions, the bend stopper assembly 6 is disposed obliquely toward the ground. Specifically, the fixing frame 1 is provided with an inclined plane facing the ground, the transmission tube body 31, the fixing tube 5, and the lead screw body 82 are coaxial and vertically disposed on the inclined plane, and the planes formed by the sliding directions of any two bend stopper assemblies 6, i.e., any two sliding rods 61, are coplanar and perpendicular to the axis of the lead screw body 82. With this structure, after the bend stopper assembly 6 slides inward, the bent plate can be easily dropped off.

[0038] The plate forming and bending device can shrink inwards after bending and push the plate to slide outwards, thereby realizing the unloading of the formed plate more easily.

[0039] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A sheet forming and bending device, characterized in that: It includes a fixing frame, a driving assembly, a transmission tube assembly, a pressure rod assembly, a fixing tube, a bending angle limiting assembly, a lower baffle, a lead screw assembly and a pushing assembly; The driving assembly is arranged on the fixing frame, the transmission tube assembly is rotatably arranged on the fixing frame, and the driving assembly can drive the transmission tube assembly to rotate; a square bending slide groove is arranged on the fixing frame, the pressure rod assembly is slidably connected in the bending slide groove, and is connected to the transmission tube assembly; The fixed tube is fixed on the fixed frame, the angle limiting components are elastic and provided with four groups, and are respectively slidably penetrated on the fixed tube; the lower baffle is fixed on the fixed tube, and can clamp the plate together with the angle limiting components; The lead screw assembly is rotatably disposed on the fixed frame, the pushing assembly is movably disposed on the lead screw assembly, one end of which is passed through the fixed tube, the pushing assembly can move with the rotation of the lead screw assembly, and the movement of the pushing assembly can make each of the bending angle limiting assemblies slide into the fixed tube and drive the plate to slide outward; The transmission tube assembly can periodically drive the lead screw assembly to rotate. The lead screw assembly is elastic and can be reset after the transmission tube assembly moves away. The reset of the pushing assembly can push each of the bending angle limiting assemblies to slide outward.

2. A sheet forming and bending device according to claim 1, characterized in that: The screw assembly includes a screw connecting rod, a screw body, a screw baffle, a torsion spring and a driven plate; the screw connecting rod is coaxially fixed on both sides of the screw body, one of the screw connecting rods is rotatably connected to the fixed frame, and the other screw connecting rod is rotatably connected to one end of the fixed tube away from the fixed frame, the screw baffle is fixed on the screw connecting rod away from the fixed frame, and is connected to the fixed tube through the torsion spring; the fixed tube is provided with an arc-shaped pushing sliding hole, one end of the driven plate is fixed on the screw connecting rod close to the fixed frame, and the other end extends outward through the pushing sliding hole, the rotation of the transmission tube assembly can drive the driven plate to rotate, and the pushing assembly is movably provided on the screw body.

3. A sheet forming and bending device according to claim 1, characterized in that: The transmission tube assembly includes a transmission tube body, a gear ring, a connecting frame and a pushing member; the transmission tube body is rotatably connected to the fixed frame, the gear ring is coaxially fixed to the transmission tube body, and the driving assembly can drive the gear ring to rotate; a pushing groove is also provided on the fixed frame, one end of the pushing member is slidably connected to the pushing groove, and the other end is slidably arranged in the connecting frame, and the pushing member can push the screw assembly.

4. A sheet forming and bending device according to claim 3, characterized in that: The pushing member includes a pushing slide rod, a pushing connecting rod and a pushing rod; the pushing slide rod is slidably connected in the connecting frame, a pushing connecting rod is rotatably provided on the top of the pushing slide rod, the pushing connecting rod is slidably connected in the connecting frame, the connecting frame is a square frame, and the pushing connecting rod is a square rod; the pushing rod is fixed on the pushing connecting rod and can push the screw assembly to rotate.

5. The sheet forming and bending device according to claim 1, characterized in that: The pushing assembly includes a ball bearing and a unloading push rod; the ball bearing is movably arranged on the lead screw, and a unloading slide hole is provided on the fixed tube. One end of the unloading push rod is fixed on the ball bearing, and the other end extends outward through the unloading slide hole. The unloading push rod can drive the plate to slide outward, and the ball bearing can push the angle limit assembly to slide outward.

6. The sheet forming and bending device according to claim 1, characterized in that: The bending angle limit assembly includes a sliding rod, a bending limit plate, a bending connecting plate and a supporting spring; the sliding rod can be slidably inserted into the fixed tube, the bending limit plate is fixedly provided at one end of the sliding rod away from the fixed tube, the sliding rod is provided with an inclined surface at one end located in the fixed tube, and the pushing assembly can squeeze and push the inclined surface of the sliding rod to make the sliding rod slide outward; the bending connecting plate is fixedly provided at one end of the sliding rod located in the fixed tube, and is connected to the inner wall of the fixed tube through the supporting spring.

7. The sheet forming and bending device according to claim 1, characterized in that: The pressure rod assembly comprises a pressure rod connecting rod, a pressure rod body and a telescopic rod; the pressure rod connecting rod is slidably connected in the bending slide groove and is connected to the pressure rod body, and the pressure rod body is connected to the transmission tube assembly through the telescopic rod.

8. The sheet forming and bending device according to claim 1, characterized in that: The driving assembly includes a motor and a driving gear; the motor is arranged on the fixing frame, and the driving gear is coaxially fixed on the output shaft of the motor and can drive the transmission tube assembly to rotate.

9. A sheet forming and bending device according to any one of claims 1 to 8, characterized in that: The corner limiting assembly is arranged obliquely toward the ground.

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