Plate bending machine for plate processing

Abstract

The present invention belongs to the technical field of sheet metal processing, and discloses a sheet metal bending machine for sheet metal processing, including a bending structure, wherein the bending structure includes a frame, a supporting structure and a transmission structure, wherein the supporting structure includes a supporting plate. The present invention uses a multi-stage cylinder to synchronously drive the telescopic end of the multi-stage cylinder to extend when bending a metal plate, so that it pushes the vertical sliding seat to move upward, and when the end of the metal plate located outside the bending machine is tilted due to the cooperation of the upper and lower molds, the supporting plate is driven to rotate by the upward movement of the vertical sliding seat, so that during the bending process of the sheet metal, the supporting plate rotates synchronously with the bending generated when the metal plate is bent, so that the supporting plate keeps in contact with the bottom surface of the metal plate during the bending process, reduces the shaking angle of the metal plate during the bending process, and thus improves the accuracy of the angle of the bending zone of the metal plate during the bending process, while preventing the shaking from causing scratches on the surface of the workpiece.

Description

Technical Field

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

[0002] Sheet metal bending is a type of sheet metal, also known as sheet metal bending. It is a very common metal processing process. The metal sheet is placed on a die, and then the punch above is controlled to move downward so that the punch squeezes the metal sheet, causing the metal sheet to deform according to the shape of the die. The most common bending method is right-angle bending, which bends the sheet metal into an L-shape at the bending line to produce products of various specified shapes.

[0003] When the existing sheet metal bending machine processes large-sized metal plates, the plates are prone to shaking during the bending process due to the downward pressure of the upper mold. At the same time, during the bending operation, the narrower part of the bending line close to the plate boundary is placed inside the bending machine, while the wider part is located on the outside of the bending machine. During the bending process, the plate will be warped on both sides of the bending line, which causes the wider part on the outside of the bending machine to shake more easily during the bending process, resulting in inaccurate bending angles. Therefore, in subsequent welding and other processing processes, the bending angle must be corrected, which not only increases the work steps, but also reduces the overall processing efficiency. Summary of the invention

[0004] The object of the present invention is to provide a plate bending machine for plate processing to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a plate bending machine for plate processing, comprising a bending structure, the bending structure comprising a frame and a symmetrical bending hydraulic cylinder fixedly connected to the front side of the frame, the telescopic ends of the symmetrical bending hydraulic cylinders are fixedly connected to an upper die frame, the front side of the frame is also fixedly connected to a lower die frame, and further comprising:

[0006] The front side of the lower mold frame is provided with a front slide groove;

[0007] The supporting structure comprises a supporting seat fixedly connected to the lower side of the front side of the lower mold frame, a fixing plate fixedly connected to the upper side of the front side of the lower mold frame, a horizontal sliding column fixedly connected to the interior of the fixing plate, a first sliding groove is provided on the top surface of the supporting seat, a symmetrical first sliding block is slidably connected to the interior of the first sliding groove, a vertical sliding column is rotatably installed inside the first sliding block, a vertical sliding seat is slidably sleeved on the outer surface of the vertical sliding column, a symmetrical horizontal sliding seat is slidably sleeved on the outer surface of the horizontal sliding column, and a fixed The top end of the vertical sliding column passes through the fixed seat and the horizontal sliding seat and is hinged with a support plate. The other end of the support plate is hinged with a connecting rod. The other end of the connecting rod is hinged to the outer surface of the vertical sliding seat. The top surface of the first sliding block is fixedly connected to a multi-stage cylinder. The telescopic end of the multi-stage cylinder is fixedly connected to the bottom surface of the vertical sliding seat. During the upward movement of the vertical sliding seat, the support plate rotates 45° toward the upper mold frame with the hinge point with the vertical sliding column as the center.

[0008] Preferably, it also includes a transmission structure, which includes a piston seat fixedly connected to the rear side of the lower mold frame, the top surface of the piston seat is slidably connected to a piston block, the top end of the piston block is fixedly connected to the rear side of the upper mold frame, and the bottom of the piston seat is connected to the multi-stage cylinder through a hose.

[0009] Preferably, a bidirectional screw is rotatably installed inside the first slide groove, the bidirectional screw passes through the symmetrical first sliding block and is threadedly connected thereto, a motor is fixedly connected to one side of the support seat, and the output shaft of the motor is fixedly connected to one end of the bidirectional screw.

[0010] Preferably, a magnet groove is provided on the top surface of the support plate, an electromagnet is movably connected in the magnet groove, a plurality of connecting columns are fixedly connected to the bottom surface of the electromagnet, the bottom ends of the connecting columns pass through the support plate, a connecting plate is fixedly connected to the bottom ends of the plurality of connecting columns, a plurality of first springs are elastically connected between the top surface of the connecting plate and the bottom surface of the support plate, the first springs are movably sleeved on the corresponding connecting columns, and the electromagnet is in an open state during the up and down movement of the bending hydraulic cylinder.

[0011] Preferably, a rotating gear is rotatably installed inside the first slider, and the rotating gear is fixedly sleeved on the outer surface of a vertical sliding column located in the first slider. A symmetrical first rack is fixedly connected to the side of the first slide groove away from the lower mold frame, and two first racks are respectively located at both ends of the first slide groove. When the rotating gear is engaged with the first rack to rotate, the rotating gear and the vertical sliding column rotate 90 degrees.

[0012] Preferably, a curved surface is provided on the front side surface of the fixing plate, a through groove is vertically provided on the transverse sliding column, and a limiting protrusion is fixedly provided on the outer surface of the transverse sliding column.

[0013] Preferably, a bending section is provided on the connecting rod, and when the vertical sliding column rotates to make the connecting rod close to the lower mold frame, the bending section prevents the connecting rod from contacting the horizontal sliding column.

[0014] Preferably, coaxial synchronous gears are rotatably mounted on both sides of the frame, and a symmetrical synchronous rack is fixedly connected to the rear side of the upper mold frame, and the synchronous gear and the synchronous rack located on the same side of the frame are meshed with each other.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention provides a multi-stage cylinder, which synchronously drives the telescopic end of the multi-stage cylinder to extend when bending the metal plate, so that it pushes the vertical sliding seat to move upward. As the upper and lower molds cooperate to make one end of the metal plate located outside the bending machine tilt up, the support plate is driven to rotate by the upward movement of the vertical sliding seat, so that during the bending process of the plate, the support plate rotates synchronously with the bending generated when the metal plate is bent, so that the support plate keeps in contact with the bottom surface of the metal plate during the bending process, reduces the shaking angle of the metal plate during the bending, and thus improves the angle accuracy of the bending zone of the metal plate during the bending process, while preventing the shaking from causing scratches on the surface of the workpiece.

[0017] 2. The present invention sets an electromagnet. When the bending hydraulic cylinder is working, that is, when it drives the upper mold frame to move up and down, the switch of the electromagnet is turned on, making the electromagnet magnetic. At this time, the electromagnet is adsorbed on the bottom surface of the metal plate on the support plate. As the bending process proceeds, the support plate rotates, so that the electromagnet is always adsorbed on the bottom surface of the metal plate, further reducing the shaking of the metal plate during the bending process, so that after bending, the angle of the bending zone is more accurate, thereby improving the processing efficiency of the plate.

[0018] 3. The present invention provides a bidirectional screw rod. After the equipment is shut down and no longer in use, the motor is turned on to drive the bidirectional screw rod to rotate, so that the two first sliding blocks move to both sides. When the rotating gear contacts the first rack and is driven to rotate by the first rack, the vertical sliding column drives the support plate to rotate 90 degrees, so that the support plate is converted from being perpendicular to the lower mold frame to being parallel to the lower mold frame, thereby reducing the space occupied by the support structure and improving space utilization. It can also prevent staff from accidentally touching the support plate when walking near the equipment, thereby improving the safety of the equipment. At the same time, when it is needed, it is only necessary to control the motor to reverse and make the two first sliding blocks move toward each other. At this time, through the cooperation of the rotating gear and the first rack, the support plate is perpendicular to the lower mold frame again, and continuing to drive the motor to reverse can also make the two support plates approach each other, so that the equipment can support metal plates of different sizes, thereby improving the scope of application of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a right rear side view of the present invention;

[0021] Figure 3 It is a schematic diagram of the support structure of the present invention;

[0022] Figure 4 This is a structural diagram of the supporting structure of the present invention;

[0023] Figure 5 For the present invention Figure 4 The enlarged schematic diagram at A in the middle;

[0024] Figure 6 This is a structural diagram of another part of the support structure of the present invention;

[0025] Figure 7 It is a partial cross-sectional view of the supporting structure of the present invention.

[0026] In the figure: 1, bending structure; 11, frame; 12, bending hydraulic cylinder; 13, upper die frame; 14, lower die frame; 15, synchronous gear; 16: synchronous rack; 17, front slide; 2, support structure; 21, support seat; 22, fixed plate; 23, horizontal slide column; 24, first slide; 25, first slide block; 26, fixed seat; 27, multi-stage cylinder; 28, vertical slide column; 29, vertical slide seat; 210, horizontal slide Moving seat; 211, supporting plate; 212, electromagnet; 213, connecting rod; 214, bidirectional screw rod; 215, motor; 216, rotating gear; 217, first rack; 218, connecting column; 219, connecting plate; 220, first spring; 221, arc surface; 222, through groove; 223, limiting protrusion; 224, bending section; 3, transmission structure; 31, piston seat; 32, piston block; 33, hose. DETAILED DESCRIPTION

[0027] 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.

[0028] like Figures 1 to 7 As shown, a plate bending machine for plate processing of this embodiment includes a bending structure 1, the bending structure 1 includes a frame 11 and a symmetrical bending hydraulic cylinder 12 fixedly connected to the front side of the frame 11, the telescopic end of the symmetrical bending hydraulic cylinder 12 is fixedly connected to an upper mold frame 13, and the front side of the frame 11 is also fixedly connected to a lower mold frame 14, and also includes:

[0029] A front slide 17 is provided on the front side of the lower mold frame 14;

[0030] The support structure 2 includes a support seat 21 fixedly connected to the lower front side of the lower mold frame 14, a fixed plate 22 fixedly connected to the upper front side of the lower mold frame 14, a horizontal sliding column 23 fixedly connected inside the fixed plate 22, a first sliding groove 24 is provided on the top surface of the support seat 21, a symmetrical first sliding block 25 is slidably connected inside the first sliding groove 24, a vertical sliding column 28 is rotatably installed inside the first sliding block 25, the outer surface of the vertical sliding column 28 is slidably sleeved with a vertical sliding seat 29, the outer surface of the horizontal sliding column 23 is slidably sleeved with a symmetrical horizontal sliding seat 210, and the lower surface of the horizontal sliding seat 210 is fixedly connected with A fixed seat 26, one end of the fixed seat 26 close to the lower mold frame 14 is slidably connected in the front slide groove 17, the top of the vertical sliding column 28 passes through the fixed seat 26 and the horizontal sliding seat 210 and is hinged with a support plate 211, the other end of the support plate 211 is hinged with a connecting rod 213, the other end of the connecting rod 213 is hinged to the outer surface of the vertical sliding seat 29, the top surface of the first sliding block 25 is fixedly connected to the multi-stage cylinder 27, the telescopic end of the multi-stage cylinder 27 is fixedly connected to the bottom surface of the vertical sliding seat 29, during the upward movement of the vertical sliding seat 29, the support plate 211 rotates 45° toward the upward mold frame 13 with the hinge point with the vertical sliding column 28 as the center.

[0031] The present invention provides a multi-stage cylinder 27, which synchronously drives the telescopic end of the multi-stage cylinder 27 to extend when bending the metal plate, so that it pushes the vertical sliding seat 29 to move upward. As the upper and lower molds cooperate to cause one end of the metal plate located outside the bending machine to tilt, the support plate 211 is driven to rotate by the upward movement of the vertical sliding seat 29, so that during the bending process of the plate, the support plate 211 rotates synchronously with the bending generated when the metal plate is bent, so that the support plate 211 maintains contact with the bottom surface of the metal plate during the bending process, thereby reducing the shaking angle of the metal plate during the bending process, thereby improving the accuracy of the angle of the bending zone of the metal plate during the bending process, and preventing the shaking from causing scratches on the surface of the workpiece.

[0032] When the bending hydraulic cylinder 12 is working, that is, when it drives the upper mold frame 13 to move up and down, the switch of the electromagnet 212 is turned on, making the electromagnet 212 magnetic. At this time, the electromagnet 212 is adsorbed on the bottom surface of the metal plate on the support plate 211. As the bending process proceeds, the support plate 211 rotates, so that the electromagnet 212 is always adsorbed on the bottom surface of the metal plate, further reducing the shaking of the metal plate during the bending process, so that after bending, the angle of the bending zone is more accurate, thereby improving the processing efficiency of the plate.

[0033] After the equipment is shut down and no longer in use, the two-way screw rod 214 is driven to rotate by turning on the motor 215, so that the two first sliders 25 move to both sides. When the rotating gear 216 contacts the first rack 217 and is driven to rotate by the first rack 217, the vertical slide column 28 drives the support plate 211 to rotate 90 degrees, so that the support plate 211 is changed from perpendicular to the lower mold frame 14 to parallel to the lower mold frame 14, thereby reducing the space occupation of the support structure 2, improving space utilization, and preventing staff from accidentally touching the support plate 211 when walking near the equipment, thereby improving the safety of the equipment. At the same time, when it is needed, it is only necessary to control the motor 215 to reverse so that the two first sliders 25 move toward each other. At this time, through the cooperation of the rotating gear 216 and the first rack 217, the support plate 211 is perpendicular to the lower mold frame 14 again, and continuing to drive the motor 215 to reverse can also make the two support plates 211 close to each other, so that the equipment can support metal plates of different sizes, thereby improving the scope of application of the equipment.

[0034] like Figure 2 As shown, it also includes a transmission structure 3, which includes a piston seat 31 fixedly connected to the rear side of the lower mold frame 14, and a piston block 32 is slidably connected to the top surface of the piston seat 31. The top end of the piston block 32 is fixedly connected to the rear side of the upper mold frame 13, and the bottom of the piston seat 31 is connected to the multi-stage cylinder 27 through a hose 33.

[0035] The transmission structure 3 is arranged so that when the upper mold frame 13 moves downward, the piston block 32 moves downward to squeeze the hydraulic oil in the piston seat 31, so that the hydraulic oil enters the multi-stage cylinder 27 through the hose 33, and drives the multi-stage cylinder 27 to extend upward, thereby driving the vertical sliding seat 29 to move upward. At this time, with the movement of the vertical sliding seat 29, the support plate 211 begins to rotate, and at the same time, the upper mold begins to bend the metal plate. As the upper mold moves downward, the metal plate is gradually bent. At the same time, the support plate 211 also rotates driven by the vertical sliding seat 29, so that the support plate 211 is always in contact with the bottom surface of the metal plate, thereby reducing the shaking of the metal plate during bending and preventing the bending angle from not meeting the requirements.

[0036] like Figure 3 and Figure 4 As shown, a bidirectional screw rod 214 is rotatably installed inside the first slide groove 24, and the bidirectional screw rod 214 passes through the symmetrical first slider 25 and is threadedly connected to it. A motor 215 is fixedly connected to one side of the support seat 21, and the output shaft of the motor 215 is fixedly connected to one end of the bidirectional screw rod 214.

[0037] The design of the bidirectional screw rod 214 allows the two first sliders 25 to move toward each other or move away from each other synchronously. When moving away from each other synchronously, when the first slider 25 moves to one end of the first slide groove 24, the support plate 211 is retracted through the cooperation of the rotating gear 216 and the first rack 217, thereby reducing the space occupied by the support plate 211 in the non-working state, thereby improving space utilization, and at the same time preventing other staff from accidentally touching the support plate 211, thereby ensuring the safety of the staff.

[0038] like Figures 3 to 6 As shown, a magnet groove is provided on the top surface of the support plate 211, and an electromagnet 212 is movably connected in the magnet groove. A plurality of connecting columns 218 are fixedly connected to the bottom surface of the electromagnet 212. The bottom ends of the connecting columns 218 penetrate the support plate 211. A connecting plate 219 is fixedly connected to the bottom ends of the plurality of connecting columns 218. A plurality of first springs 220 are elastically connected between the top surface of the connecting plate 219 and the bottom surface of the support plate 211. The first springs 220 are movably sleeved on the corresponding connecting columns 218. The electromagnet 212 is in an open state during the up and down movement of the bending hydraulic cylinder 12.

[0039] By setting the electromagnet 212, in the bending process, as the bending hydraulic cylinder 12 is started, the electromagnet 212 is adsorbed on the bottom surface of the metal plate, and as the metal plate is bent, the support plate 211 rotates at the same time, so that during the entire bending process, the electromagnet 212 is always adsorbed on the bottom surface of the metal plate to prevent the metal plate from shaking during bending, further ensuring that the angle after bending meets the requirements, thereby improving the processing efficiency.

[0040] like Figure 4 , Figure 5As shown, a rotating gear 216 is rotatably installed inside the first slider 25, and the rotating gear 216 is fixedly sleeved on the outer surface of the vertical slide column 28 located in the first slider 25. The side of the first slide groove 24 away from the lower mold frame 14 is fixedly connected with a symmetrical first rack 217. The two first racks 217 are respectively located at the two ends of the first slide groove 24. When the rotating gear 216 is engaged with the first rack 217 to rotate, the rotating gear 216 and the vertical slide column 28 rotate 90 degrees.

[0041] By setting the rotating gear 216 and the first rack 217, when the two first sliders 25 are driven to move to both sides by the bidirectional screw rod 214, as the rotating gear 216 contacts the first rack 217, the rotating gear 216 rotates, thereby driving the vertical sliding column 28 to rotate. At this time, the support plate 211 switches from being perpendicular to the lower mold frame 14 to being parallel to the lower mold frame 14, thereby reducing the space occupied by the support plate 211, and at the same time reducing the health damage caused by direct contact with the support plate 211 when the staff walks near the equipment, thereby improving the safety of the equipment.

[0042] like Figure 7 As shown, a curved surface 221 is provided on the front side of the fixing plate 22 , a through groove 222 is vertically provided on the horizontal sliding column 23 , and a limiting protrusion 223 is fixedly provided on the outer surface of the horizontal sliding column 23 .

[0043] The arc surface 221 is provided to prevent the front end of the support plate 211 from directly contacting the fixed plate 22 during the rotation process, so that the support plate 211 is stuck and cannot rotate with the metal plate and reduce the shaking of the metal plate during the bending process. The through groove 222 vertically provided on the horizontal sliding column 23 is to allow the vertical sliding column 28 to pass through the horizontal sliding column 23 and drive the support plate 211 to rotate. The setting of the limiting protrusion 223 is to prevent the horizontal sliding seat 210 from rotating after the metal plate is on the support plate 211, causing the support plate 211 to tilt outward, making it impossible for the metal plate to remain in a horizontal state, affecting the subsequent bending steps.

[0044] like Figures 3 to 6 As shown, a bending section 224 is provided on the connecting rod 213 . When the vertical sliding column 28 rotates to make the connecting rod 213 close to the lower mold frame 14 , the bending section 224 prevents the connecting rod 213 from contacting the horizontal sliding column 23 .

[0045] like Figure 2 As shown, coaxial synchronous gears 15 are rotatably mounted on both sides of the frame 11, and a symmetrical synchronous rack 16 is fixedly connected to the rear side of the upper mold frame 13. The synchronous gears 15 and the synchronous rack 16 located on the same side of the frame 11 are meshed with each other.

[0046] The symmetrical synchronous gear 15 and synchronous rack 16 ensure that the two ends of the upper mold frame 13 are at the same height during the upper and lower movements of the upper mold frame 13, thereby preventing the bending lines of the metal plate from being squeezed at the same time during the bending process, resulting in poor bending effect.

[0047] Working principle:

[0048] When using this equipment to perform bending processing on metal plates, first drive the motor 215 to drive the bidirectional screw 214 to rotate, and then drive the two first sliders 25 to move toward each other. As the first slider 25 moves, the rotating gear 216 is driven by the first rack 217 to rotate, causing the vertical slide column 28 to rotate, and then driving the support plate 211 to switch from being parallel to the lower mold frame 14 to being perpendicular to the lower mold frame 14, so that the support plate 211 can support the metal plate. At the same time, the relative distance between the two first sliders 25 can be controlled according to the size data of the metal plate.

[0049] When the metal plate is placed on the support plate 211, the bending line is aligned with the bending position of the bending structure 1, and then the bending hydraulic cylinder 12 is controlled to extend to drive the upper mold frame 13 to bend the metal plate. At this time, as the telescopic end of the multi-stage cylinder 27 extends, the support plate 211 is driven to rotate. At the same time, as the bending hydraulic cylinder 12 is driven, the electromagnet 212 is turned on. At this time, the electromagnet 212 is adsorbed on the bottom surface of the metal plate, so that the metal plate is continuously supported, reducing the deviation of the bending angle caused by the shaking of the metal plate during the bending process, thereby ensuring the processing effect and improving the bending efficiency of the metal plate.

[0050] After the bending is completed, the motor 215 is used to drive the bidirectional screw rod 214 to rotate, thereby driving the two first sliders 25 to move away from each other. As the first slider 25 moves, the rotating gear 216 contacts the first rack 217, driving the vertical slide column 28 to rotate, and the vertical slide column 28 drives the support plate 211 to rotate, thereby switching the support plate 211 to a state parallel to the lower mold frame 14, reducing the space occupied by the support plate 211.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plate bending machine for plate processing, comprising a bending structure (1), the bending structure (1) comprising a frame (11) and a symmetrical bending hydraulic cylinder (12) fixedly connected to the front side of the frame (11), the telescopic end of the symmetrical bending hydraulic cylinder (12) being fixedly connected to an upper mold frame (13), and the front side of the frame (11) being also fixedly connected to a lower mold frame (14), characterized in that: Also includes: A front slide groove (17) is formed on the front side of the lower mold frame (14); A support structure (2), the support structure (2) comprising a support seat (21) fixedly connected to the lower side of the front side of the lower mold frame (14), a fixed plate (22) fixedly connected to the upper side of the front side of the lower mold frame (14), a horizontal sliding column (23) fixedly connected inside the fixed plate (22), a first sliding groove (24) is provided on the top surface of the support seat (21), a symmetrical first sliding block (25) is slidably connected inside the first sliding groove (24), a vertical sliding column (28) is rotatably installed inside the first sliding block (25), an outer surface of the vertical sliding column (28) is slidably sleeved with a vertical sliding seat (29), an outer surface of the horizontal sliding column (23) is slidably sleeved with a symmetrical horizontal sliding seat (210), and a fixed seat (26) is fixedly connected to the lower surface of the horizontal sliding seat (210). , one end of the fixed seat (26) close to the lower mold frame (14) is slidably connected in the front slide groove (17), the top end of the vertical slide column (28) passes through the fixed seat (26) and the horizontal sliding seat (210) and is hinged to a support plate (211), the other end of the support plate (211) is hinged to a connecting rod (213), the other end of the connecting rod (213) is hinged to the outer surface of the vertical sliding seat (29), the top surface of the first sliding block (25) is fixedly connected to a multi-stage cylinder (27), the telescopic end of the multi-stage cylinder (27) is fixedly connected to the bottom surface of the vertical sliding seat (29), and during the upward movement of the vertical sliding seat (29), the support plate (211) rotates 45° toward the upper mold frame (13) with the hinge point with the vertical slide column (28) as the center of the circle; It also includes a transmission structure (3), the transmission structure (3) including a piston seat (31) fixedly connected to the rear side of the lower mold frame (14), a piston block (32) slidably connected to the top surface of the piston seat (31), the top end of the piston block (32) fixedly connected to the rear side of the upper mold frame (13), and the bottom of the piston seat (31) is connected to the multi-stage cylinder (27) through a hose (33); A bidirectional screw rod (214) is rotatably mounted inside the first slide groove (24), the bidirectional screw rod (214) passes through the symmetrical first slider (25) and is threadedly connected thereto, a motor (215) is fixedly connected to one side of the support seat (21), and an output shaft of the motor (215) is fixedly connected to one end of the bidirectional screw rod (214); The top surface of the support plate (211) is provided with a magnet groove, an electromagnet (212) is movably engaged in the magnet groove, a plurality of connecting columns (218) are fixedly connected to the bottom surface of the electromagnet (212), the bottom ends of the connecting columns (218) penetrate the support plate (211), a connecting plate (219) is fixedly connected to the bottom ends of the plurality of connecting columns (218), a plurality of first springs (220) are elastically connected between the top surface of the connecting plate (219) and the bottom surface of the support plate (211), the first springs (220) are movably sleeved on corresponding connecting columns (218), and the electromagnet (212) is in an open state during the process of the bending hydraulic cylinder (12) moving up and down; A rotating gear (216) is rotatably installed inside the first slider (25), and the rotating gear (216) is fixedly sleeved on the outer surface of the vertical slide column (28) located in the first slider (25). A symmetrical first rack (217) is fixedly connected to the side of the first slide groove (24) away from the lower mold frame (14), and the two first racks (217) are respectively located at the two ends of the first slide groove (24). When the rotating gear (216) is engaged with the first rack (217) to rotate the rotating gear (216), the rotating gear (216) and the vertical slide column (28) rotate 90 degrees.

2. A sheet metal bending machine for sheet metal processing according to claim 1, characterized in that: The front side surface of the fixing plate (22) is provided with an arc surface (221), the transverse sliding column (23) is vertically provided with a through groove (222), and the outer surface of the transverse sliding column (23) is fixedly provided with a limiting protrusion (223).

3. A sheet metal bending machine for sheet metal processing according to claim 2, characterized in that: The connecting rod (213) is provided with a bent section (224), and when the vertical sliding column (28) rotates to make the connecting rod (213) close to the lower mold frame (14), the bent section (224) prevents the connecting rod (213) from contacting the horizontal sliding column (23).

4. A sheet metal bending machine for sheet metal processing according to claim 3, characterized in that: Coaxial synchronous gears (15) are rotatably mounted on both sides of the frame (11); a symmetrical synchronous rack (16) is fixedly connected to the rear side of the upper mold frame (13); the synchronous gears (15) and the synchronous racks (16) located on the same side of the frame (11) are meshed with each other.

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