Automatic plate turning device for a flanging unit

Abstract

This invention discloses an automatic sheet metal flipping device for edge-folding units, involving a machining technology solution. It includes a movable conveyor roller, a roller base frame, a movable flipping suction cup gripper, and a flipping base frame. The device integrates feeding, centering, flipping, and conveying functions. Precise positioning is achieved through a servo-driven centering and alignment device. The movable flipping suction cup gripper can complete 180° flipping in both directions. Individual suction cup components are adjustable and adaptable to large-format, heavy-duty, irregularly shaped, and porous sheets. Servo control and synchronous belt drive ensure smooth operation and precise positioning. The frame is fixed with detachable bolts, and the bottom leveling feet adapt to different sites. It supports parallel operation and single-piece operation, and can be seamlessly integrated into existing automated production lines, effectively improving production efficiency and reducing scrap rates.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to an automatic sheet metal flipping device for a folding unit. Background Technology

[0002] In the field of machining, especially CNC sheet metal bending, as the manufacturing industry transforms towards automation and intelligence, automated CNC sheet metal bending production lines have become core equipment for improving production scale and processing accuracy. The flipping device, as a key auxiliary non-standard optional component of the bending unit, directly determines the continuous operation capability, processing adaptability, and final product quality of the production line.

[0003] Currently, similar flipping devices on the domestic market generally suffer from significant technical shortcomings: First, their adaptability is limited. Most devices can only handle regular sheets of a single specification, lacking the ability to process large sheets, heavy-duty conditions, and irregularly shaped or multi-hole parts. Furthermore, their sheet thickness adaptability is narrow, making it difficult to meet diverse production needs. Second, their stability and positioning accuracy are insufficient. Some devices use traditional mechanical transmission structures, lacking precise servo control and error compensation mechanisms. This results in large errors in sheet alignment and is prone to displacement and deformation during the flipping process, leading to deviations in subsequent edge-folding accuracy and a high scrap rate. Third, their production efficiency is low. Existing devices mostly employ a "single-process serial" approach. The production process suffers from several problems: First, the flow between processes such as flipping, centering, and loading is not smooth, lacking parallel operation design, and some processes rely on manual intervention, making it unsuitable for the pace requirements of high-speed automated production lines. Second, the structural design is unreasonable, with some devices being bulky and scattered, requiring a large amount of space, and the fixed frame connection method makes installation and debugging inconvenient and difficult to integrate with different specifications of folding machines. Third, the functions are limited, lacking the ability to perform inter-order operations, requiring shutdown and re-adjustment when production plans are adjusted, which seriously affects the flexibility and response speed of the production line. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic flipping device for sheet metal in a folding unit, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic flipping device for sheet metal in a folding unit, comprising a movable conveyor roller, a roller base frame, a movable flipping suction cup gripper, and a flipping base frame; the movable conveyor roller is installed on the upper end of the roller base frame, and the flipping base frame is arranged side by side at the rear end of the movable conveyor roller; a movable flipping suction cup gripper is installed above the flipping base frame; the roller base frame includes two sets of frame columns A2 at the end, two sets of columns B2 at the tail, and two sets of guide rail beams; the two sets of frame columns A2 are fixed by connecting supports; the movable conveyor roller includes a roller line at the top, a roller support bracket on the side of the roller line, a lifting cylinder connected to the side of the roller support bracket by a shock absorber, and a servo centering and aligning device at the top of the roller support bracket; a connecting... The second bracket, the flipping base frame, includes two sets of frame columns A at one end, two sets of columns B at the other end, and two sets of guide rail beams. A reducer and a horizontal walking servo motor are mounted on the outside of the frame columns A via a reducer mounting plate. The horizontal walking servo motor drives a movable flipping suction cup gripper via a synchronous belt. The movable flipping suction cup gripper includes a walking bracket assembly and a suction cup gripper assembly. The walking bracket assembly includes suction cup gripper mounting brackets on both sides and a connecting bracket. A slider is mounted on the bottom of the suction cup gripper mounting bracket via a spring floating assembly, and the slider is slidably connected to a guide rail fixed above the guide rail beam. The suction cup gripper assembly includes a rotary shaft servo motor and a rotary shaft reducer mounted on the side of the suction cup gripper mounting bracket, a frame composed of aluminum profiles A and B, and multiple sets of individual suction cup assemblies fixed on aluminum profiles B.

[0006] Furthermore, a frame column A2 with a bearing seat 3 is provided below the connecting support 2, and the frame column A2 is connected to the reducer 2, and a horizontal travel servo motor is connected below the reducer 2. The reducer 2 and the horizontal travel servo motor are fixed to the outside of the frame column A2 by the reducer mounting plate 2. The horizontal travel main drive shaft 2 drives the synchronous belt 2 to rotate, and the two ends of the synchronous belt 2 are fixed to the bottom of the roller conveyor by the synchronous belt metal parts 2. The synchronous belt 2 passes around the synchronous pulley transmission wheel system 2 installed inside the column B2.

[0007] Furthermore, a second guide rail is fixed above the second guide beam, and a roller installed below the roller conveyor corresponds to the position of the second guide rail. At the same time, a drag chain is connected below the roller conveyor, and a fixed stop is fixed on the second guide beam at one end of the roller conveyor.

[0008] Furthermore, the guide rail is equipped with a driven rotating shaft via a bearing seat, and the driven rotating shaft is fixed to the middle of one end of the frame formed by aluminum profile A and aluminum profile B. Meanwhile, the driving rotating shaft installed at the other end of the frame is connected to the output shaft of the reducer mounting base. A flipping rotating drag chain with threaded wire is provided on the outside of the driven rotating shaft, and a flipping limit is installed on the frame outside the driving rotating shaft.

[0009] Furthermore, the multiple sets of multi-needle valve groups installed on the aluminum profile B are connected to the multi-needle valve groups through pipes, and the multi-needle valve groups are connected to the vacuum system, and the pipes are arranged through cable trays.

[0010] Furthermore, a horizontal main drive shaft is installed below the connecting support at the upper end of the frame column A. A bearing with a seat is installed at the connection between the horizontal main drive shaft and the frame column A. A synchronous belt is wrapped around the horizontal main drive shaft. One end of the synchronous belt is wrapped around the synchronous pulley system inside the column B and then fixed to the bottom side of the guide rail by a metal part. The other end of the synchronous belt is on the other side below the guide rail. At the same time, a drag chain is installed on the guide rail beam outside the synchronous belt.

[0011] Furthermore, the movable flip-up suction cup gripper has a rotation angle of 180° in both directions, and the rotating shaft servo motor drives the active rotating shaft to rotate through the rotating shaft reducer.

[0012] Furthermore, the single suction cup assembly can slide along the length of the aluminum profile B to adjust its installation position and is fixed by a locking component.

[0013] Furthermore, the two sets of guide rail beams of the roller conveyor base frame and the two sets of guide rail beams of the flipping base frame are arranged in parallel and fitted together, and the two sets of guide rail beams and the two sets of guide rail beams are fixed by detachable bolts. The bottom of both sets of frames is provided with leveling feet of equal height.

[0014] Compared with the prior art, the beneficial effects of the present invention are: wide processing range and strong adaptability, which can cover large panel materials and heavy-duty working conditions; the position of a single suction cup assembly can be adjusted by sliding along the aluminum profile, and the adsorption can be independently controlled by the multi-needle valve group, which has outstanding adaptability to irregular and porous workpieces, and the effective adsorption contact area is not less than 80%.

[0015] With high positioning accuracy and operational stability, the servo centering and alignment device provides a precise benchmark for flipping and feeding through bidirectional servo drive and position sensor; the moving conveyor roller and the flipping suction cup gripper are both servo controlled, and with synchronous belt drive and guide rail structure, the movement is smooth and the feeding position is controllable. The shock absorber can prevent the plate from shifting or deforming.

[0016] With excellent production efficiency and site adaptability, the device integrates feeding, flipping, and centering functions, and supports order insertion. Through the parallel operation mode of flipping the first sheet and centering the second sheet, the production line turnover efficiency is greatly improved. The roller conveyor base frame and the flipping base frame are fixed with detachable bolts to form an integrated and compact structure. The bottom leveling feet can be adjusted independently, which has low requirements for site layout and flexible installation.

[0017] With strong compatibility and practicality, it can be seamlessly adapted to all folding machine models of the same brand and easily integrated into existing automated production lines. During equipment operation, the design of the drag chain and cable tray can effectively protect the cables and prevent them from being pulled or tangled. The flipping limit and spring floating components further ensure operational safety and equipment lifespan. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the equipment components of the patented device;

[0019] Figure 2 This is a structural diagram of the movable, flip-up suction cup gripper and the flip-up base frame;

[0020] Figure 3 This is a structural diagram of the movable conveyor roller and the roller base frame.

[0021] In the diagram: 1. Movable conveyor roller; 2. Roller base frame; 3. Movable tilting suction cup gripper; 4. Tilting base frame; 101. Rotary shaft servo motor; 102. Rotary shaft reducer; 103. Reducer mounting base; 104. Active rotary shaft; 105. Suction cup gripper mounting bracket; 106. Tilting limit switch; 107. Cable tray; 108. Connecting bracket one; 109. Aluminum profile A; 110. Aluminum profile B; 11 1. Single suction cup assembly; 112. Multi-needle valve assembly; 113. Driven rotary shaft; 114. Bearing with seat 1; 115. Flipping rotary cable chain; 116. Frame column A; 117. Bearing with seat 2; 118. Horizontal travel main drive shaft 1; 119. Connecting support 1; 120. Reducer mounting plate 1; 121. Reducer 1; 122. Horizontal travel servo motor 1; 123. Spring floating assembly; 124. Slider; 125. Guide rail 1; 126. Cable chain 1; 127. Metal parts for timing belt 1; 128. Timing belt 1; 129. Guide rail crossbeam 1; 130. Timing pulley drive train 1; 131. Column B 1; 201. Roller conveyor; 202. Lifting cylinder; 203. Shock absorber; 204. Roller conveyor support bracket; 205. Connecting bracket 2; 206. Servo centering and alignment device; 207. Fixed side guard; 208. Frame column A 209. Bearing with seat; 210. Horizontal travel main drive shaft; 211. Connecting support; 212. Reducer mounting plate; 213. Reducer; 214. Horizontal travel servo motor; 215. Cable chain; 216. Guide rail; 217. Roller; 218. Metal parts for synchronous belt; 219. Synchronous belt; 220. Guide rail beam; 221. Synchronous pulley drive system; 222. Column B. Detailed Implementation

[0022] Please see Figure 1-3This invention provides a technical solution: an automatic flipping device for sheet metal in a folding unit, comprising a movable conveyor roller 1, a roller base frame 2, a movable flipping suction cup gripper 3, and a flipping base frame 4; the movable conveyor roller 1 is installed on the upper end of the roller base frame 2, and the flipping base frame 4 is arranged side by side at the rear end of the movable conveyor roller 1; the movable flipping suction cup gripper 3 is installed on the top of the flipping base frame 4; the roller base frame 2 includes two sets of frame columns A208 at the end and two sets of columns B at the tail. The movable conveyor roller conveyor 1 includes a roller conveyor line 201 mounted above, a roller conveyor support bracket 204 mounted on the side of the roller conveyor line 201, a lifting cylinder 202 connected to the side of the roller conveyor support bracket 204 via a shock absorber 203, and a servo centering and alignment device 206 mounted above the roller conveyor support bracket 204. A connecting bracket 205 is mounted on the side of the roller conveyor support bracket 204. The flipping base frame is also included. 4 includes two sets of frame columns A-116 at one end, two sets of columns B-131 at the other end, and two sets of guide rail beams-129. A reducer-121 and a horizontal travel servo motor-122 are mounted on the outside of frame columns A-116 via a reducer mounting plate-120. The horizontal travel servo motor-122 drives a movable tilting suction cup gripper 3 via a synchronous belt-128. The movable tilting suction cup gripper 3 includes a traveling support assembly and a suction cup gripper assembly. The traveling support assembly includes suction cup grippers on both sides. The suction cup gripper mounting bracket 105 and the connecting bracket 108 are provided. The bottom of the suction cup gripper mounting bracket 105 is equipped with a slider 124 via a spring floating assembly 123. The slider 124 is slidably connected to a guide rail 125 fixed above a guide rail beam 129. The suction cup gripper assembly includes a rotating shaft servo motor 101 and a rotating shaft reducer 102 mounted on the side of the suction cup gripper mounting bracket 105, a frame composed of aluminum profiles A109 and B110, and multiple sets of individual suction cup assemblies 111 fixed on the aluminum profiles B110.

[0023] A frame column A 208 with a bearing 3 209 is installed below the connecting support 211. The frame column A 208 is connected to the reducer 213. The reducer 213 is connected to the horizontal travel servo motor 214. The reducer 213 and the horizontal travel servo motor 214 are fixed to the outside of the frame column A 208 by the reducer mounting plate 212. The horizontal travel main drive shaft 210 drives the synchronous belt 219 to rotate. The two ends of the synchronous belt 219 are fixed to the bottom of the roller conveyor 201 by the synchronous belt metal parts 218. The synchronous belt 219 passes around the synchronous pulley transmission wheel system 221 installed inside the column B 222.

[0024] A guide rail 216 is fixed above the guide beam 220, and a roller 217 installed below the roller conveyor 201 corresponds to the position of the guide rail 216. At the same time, a cable chain 215 for threading is connected below the roller conveyor 201, and a fixed stop 207 is fixed on the guide beam 220 at one end of the roller conveyor 201.

[0025] The guide rail 125 is equipped with a driven rotating shaft 113 via a bearing 114. The driven rotating shaft 113 is fixed to the middle of one end of a frame composed of aluminum profile A109 and aluminum profile B110. Meanwhile, the driving rotating shaft 104 installed at the other end of the frame is connected to the output shaft of the reducer mounting base 103. A flipping rotating cable chain 115 is provided on the outside of the driven rotating shaft 113, and a flipping limiter 106 is installed on the frame outside the driving rotating shaft 104.

[0026] Multiple needle valve groups 112 are installed on the aluminum profile B110 and connected to the needle valve group 112 via pipes. The needle valve group 112 is connected to the vacuum system and the pipes are arranged through the cable tray 107.

[0027] A horizontal main drive shaft 118 passes through the lower part of the connecting support 119 at the upper end of the frame column A-116. A bearing 117 with a seat is installed at the connection between the horizontal main drive shaft 118 and the frame column A-116. A synchronous belt 128 is wrapped around the horizontal main drive shaft 118. One end of the synchronous belt 128 is wrapped around the synchronous pulley transmission wheel system 130 inside the column B-131 and then fixed to the bottom side of the guide rail 125 by a metal part 127. The other end of the synchronous belt 128 is on the other side below the guide rail 125. At the same time, a drag chain 126 is installed on the guide rail beam 129 outside the synchronous belt 128.

[0028] The movable flip suction cup gripper 3 has a rotation angle of 180° in both directions, and the rotary axis servo motor 101 drives the active rotary axis 104 to rotate through the rotary axis reducer 102.

[0029] The installation position of a single suction cup assembly 111 can be adjusted by sliding along the length of the aluminum profile B110 and is fixed by a locking device.

[0030] The two sets of guide rail beams 220 of the roller conveyor base frame 2 and the two sets of guide rail beams 129 of the flipping base frame 4 are arranged in parallel and fitted together. The guide rail beams 220 and 129 are fixed with detachable bolts to form an integrated support structure. The leveling feet at the bottom of the two sets of frames can be adjusted independently to ensure that guide rail 125 and guide rail 216 are on the same horizontal plane, preventing the sheet metal from shifting when transferred between the roller conveyor and the gripper.

[0031] After the horizontal walking servo motor 214 is started, the power is reduced and increased in torque by the reducer 213, driving the horizontal walking main drive shaft 210 to rotate, which in turn drives the synchronous belt 219 to circulate along the synchronous pulley system 221. Since the two ends of the synchronous belt 219 are fixed to the roller conveyor 201 through the synchronous belt metal parts 218, the linear motion of the synchronous belt is converted into the horizontal displacement of the roller conveyor. The rollers 217 below the roller conveyor 201 roll along the guide rail 216 to reduce frictional resistance, and the drag chain 215 moves synchronously with the roller conveyor to protect the internal cables from being pulled.

[0032] After receiving a control signal, the lifting cylinder 202 extends and retracts, transmitting force to the roller support bracket 204 through the shock absorber 203, driving the roller conveyor 201 to rise and fall as a whole. The shock absorber 203 can buffer the impact load generated by the cylinder extension and retraction, preventing the board from shifting or deforming due to instantaneous force; the lifting height is preset by the control system to ensure that the board can be accurately pushed into the adsorption range of the movable flip suction cup gripper 3 when the roller conveyor rises.

[0033] The servo-aligning and aligning device 206 incorporates a bidirectional servo drive mechanism and a position sensor. After the board material is conveyed to the fixed edge 207, the sensor detects the edge position of the board material and feeds it back to the control system (the existing PLC control system). Based on the board material size parameters, the control system drives the two aligning plates on both sides to move synchronously towards the center, aligning the board material to the preset center baseline through flexible contact. The alignment position error is controlled within ±0.5mm, providing precise positioning for subsequent adsorption and flipping.

[0034] The horizontal walking servo motor 122 outputs power, which is reduced in speed by the reducer 21 and then transmitted through the synchronous belt 128 and the synchronous pulley system 130. The synchronous belt 128 is fixed to the walking support assembly via the synchronous belt connector 127, driving the slider 124 to slide along the guide rail 125, thus achieving the overall horizontal movement of the gripper. The spring floating assembly 123 can compensate for slight level deviations in the guide rail installation or the site, ensuring that the suction cup assembly remains parallel and in contact with the surface of the material.

[0035] After receiving the flipping signal, the rotary axis servo motor 101 adjusts the speed and torque via the rotary axis reducer 102, driving the active rotary axis 104 to rotate. The active rotary axis 104 drives the frame composed of aluminum profiles A109 and B110 to rotate synchronously. The driven rotary axis 113 supports the frame through a bearing 114 to ensure rotational stability. The flipping limit switch 106 has a built-in limit switch. When the frame rotates to 180° and can be rotated in either direction, the limit signal is triggered, the motor stops rotating, and the flipping action is completed. The flipping rotation cable chain 115 retracts and extends with the frame rotation, protecting the internal cables from tangling and damage.

[0036] After the vacuum system is activated, negative pressure is supplied to the multi-needle valve assembly 112 through pipelines. The multi-needle valve assembly 112 independently controls the on / off state of each individual suction cup assembly 111 according to the size and shape of the sheet material. Once a single suction cup assembly 111 contacts the surface of the sheet material, the negative pressure firmly adheres the sheet material. When the sheet material needs to be released, the multi-needle valve assembly 112 connects to the atmosphere, balancing the pressure inside and outside the suction cups, allowing the sheet material to fall smoothly. The suction cup assemblies can slide and adjust their position along the aluminum profile B110 and are fixed by locking components, adapting to different sizes, irregular shapes, or porous sheets material, ensuring an effective contact area of ​​no less than 80%.

[0037] Process Flow: The first sheet material is conveyed from the previous process to the fixed edge of the movable conveyor roller 1. Then, the servo-aligning and aligning device 206 aligns the sheet material. During the transport and alignment of the sheet material, the movable flipping suction cup gripper 3 has already moved to the top of the movable roller 1 to wait. After the sheet material is aligned, the conveyor roller 1 is raised as a whole by the lifting cylinder 202; the sheet material is placed on the suction cup gripper, which picks it up and then withdraws from the roller 1 area to complete the flipping action. Simultaneously, the second sheet material is aligned and aligned on the movable conveyor roller 1. After the first sheet material is flipped, the movable flipping suction cup gripper 3 moves the sheet material to the loading position. At the same time, the movable conveyor roller 1 moves the second sheet material to directly below the movable flipping suction cup gripper 3, and the loading gripper picks up the flipped sheet material for loading. Then the moving roller conveyor rises as a whole, and the movable flipping suction cup gripper 3 picks up the second board. The movable flipping suction cup gripper 3 then withdraws from the roller conveyor area to complete the flipping. The flipping suction cup gripper takes the flipped board into the feeding position, and the feeding gripper picks up the board for feeding. The process is repeated until the processing is completed.

Claims

1. An automatic flipping device for sheet metal used in a folding unit, characterized in that: It includes a movable conveyor roller (1), a roller base frame (2), a movable flipping suction cup gripper (3), and a flipping base frame (4); the movable conveyor roller (1) is installed on the upper end of the roller base frame (2), and the flipping base frame (4) is arranged side by side at the rear end of the movable conveyor roller (1). The movable flipping suction cup gripper (3) is installed on the top of the flipping base frame (4). The roller base frame (2) includes two sets of frame columns A (208) at the end, two sets of columns B (222) at the tail, and two sets of guide rail beams (220). The frame column A (208) is fixed by the connecting support (211). The movable conveyor roller (1) includes a roller line (201) set above, a roller support bracket (204) set on the side of the roller line (201), a lifting cylinder (202) connected to the side of the roller support bracket (204) by a shock absorber (203), and a servo centering and aligning device (206) set above the roller support bracket (204). The connecting bracket (205) is set on the side of the roller support bracket (204). The flipping base frame (4) includes two sets of frames set at one end. The frame includes a column A (116), two sets of columns B (131) at the other end, and two sets of guide rail beams (129). A reducer (121) and a horizontal walking servo motor (122) are mounted on the outside of the frame column A (116) via a reducer mounting plate (120). The horizontal walking servo motor (122) drives a movable flip-over suction cup gripper (3) via a synchronous belt (128). The movable flip-over suction cup gripper (3) includes a walking support assembly and a suction cup gripper assembly. The walking support assembly includes suction cup gripper mounting brackets (105) on both sides. The suction cup gripper mounting bracket (105) is connected to a first bracket (108). The bottom of the suction cup gripper mounting bracket (105) is equipped with a slider (124) via a spring floating assembly (123). The slider (124) is slidably connected to a guide rail (125) fixed above a guide rail beam (129). The suction cup gripper assembly includes a rotating shaft servo motor (101) and a rotating shaft reducer (102) mounted on the side of the suction cup gripper mounting bracket (105), a frame composed of aluminum profile A (109) and aluminum profile B (110), and multiple sets of individual suction cup assemblies (111) fixed on aluminum profile B (110). Below the connecting support two (211), a frame column A two (208) with a bearing three (209) is provided, and the frame column A two (208) is connected to the reducer two (213), and the reducer two (213) is connected to the horizontal walking servo motor (214) below, and the reducer two (213) and the horizontal walking servo motor (214) are fixed to the outside of the frame column A two (208) by the reducer mounting plate two (212); the horizontal walking main drive shaft two (210) drives the synchronous belt two (219) to rotate, and the two ends of the synchronous belt two (219) are fixed to the bottom of the roller line (201) by the synchronous belt metal part two (218), and the synchronous belt two (219) passes around the synchronous wheel transmission gear system two (221) installed inside the column B two (222); A guide rail (216) is fixed above the guide rail beam (220), and the roller (217) installed below the roller conveyor (201) corresponds to the position of the guide rail (216). At the same time, a cable chain (215) is connected below the roller conveyor (201), and a fixed stop (207) is fixed on the guide rail beam (220) at one end of the roller conveyor (201). A horizontal main drive shaft (118) is installed below the connecting support (119) at the upper end of the frame column A (116). A bearing (117) with a seat is installed at the connection between the horizontal main drive shaft (118) and the frame column A (116). A synchronous belt (128) is wrapped around the horizontal main drive shaft (118). One end of the synchronous belt (128) is wrapped around the synchronous pulley transmission wheel system (130) inside the column B (131) and then fixed to the bottom side of the guide rail (125) by a metal part (127). The other end of the synchronous belt (128) is on the other side below the guide rail (125). At the same time, a drag chain (126) is installed on the guide rail beam (129) outside the synchronous belt (128).

2. The automatic sheet metal flipping device for the folding unit according to claim 1, characterized in that: The guide rail (125) is equipped with a driven rotating shaft (113) via a bearing (114), and the driven rotating shaft (113) is fixed at the middle of one end of the frame formed by aluminum profile A (109) and aluminum profile B (110). Meanwhile, the active rotating shaft (104) installed at the other end of the frame is connected to the output shaft of the reducer mounting base (103). A flipping rotating drag chain (115) with threaded wire is provided on the outside of the driven rotating shaft (113), and a flipping limiter (106) is installed on the frame outside the active rotating shaft (104). The movable flipping suction cup gripper (3) has a rotation angle of 180° in both directions, and the rotating shaft servo motor (101) drives the active rotating shaft (104) to rotate via the rotating shaft reducer (102).

3. The automatic sheet metal flipping device for the folding unit according to claim 1, characterized in that: The multiple sets of needle valve groups (112) provided on the aluminum profile B (110) are connected to the vacuum system through pipes, and the pipes are arranged through the cable tray (107).

4. The automatic sheet metal flipping device for the folding unit according to claim 1, characterized in that: The single suction cup assembly (111) can slide along the length of the aluminum profile B (110) to adjust its installation position and is fixed by a locking member.

5. The automatic sheet metal flipping device for the folding unit according to claim 1, characterized in that: The two sets of guide rail beams 220 of the roller base frame (2) and the two sets of guide rail beams 129 of the flipping base frame (4) are arranged in parallel and close together. The guide rail beams 220 and the guide rail beams 129 are fixed by detachable bolts. The bottom of both frames is provided with leveling feet of equal height.

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