An automatic production line equipment for the back panel of a freezer

Abstract

The present invention discloses an automatic production line device for a refrigerator back panel, which relates to the technical field of refrigerator back panel production. The present invention includes a frame, and a punching head and a bending punching head are arranged at the inner top of the frame. The punching head and the bending punching head are both driven by hydraulic cylinders, and the punching head is sleeved outside the bending punching head. Four groups of punching rods are arranged at the bottom of the punching head. A punching die and a bending frame are installed inside the frame, and the bending frame is located below the punching die. An inner support plate capable of lifting is arranged inside the frame, and the inner support plate can pass through the punching die and the bending frame. In the present invention, the punching die and the bending frame are arranged up and down, so that punching, deburring and bending can be realized in the same device. The device occupies a small area and has high production efficiency. By swinging the long side rod and the short side rod to the vertical state, the deburring treatment can be carried out on the cut openings at the four corners of the back panel. When the long side rod and the short side rod swing to the horizontal state, the bending treatment can be carried out on the back panel, and the manufacturing cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of the production of freezer back panels, and particularly to an automatic production line equipment for freezer back panels. Background Art

[0002] With the development of the modern household appliance industry, especially the increasing production demands of household appliances such as freezers and refrigerators, higher requirements are put forward for the automation and efficiency of production lines. During the production process of freezers, the back panel, as an important part of the freezer, not only plays a role in structural support but also is directly related to the appearance and functionality of the freezer. Therefore, the production precision, processing efficiency, and product quality of the back panel become one of the key factors in the freezer production process.

[0003] During the production process of freezer back panels, corner blanking needs to be carried out first, and then bending treatment is performed. In a Chinese patent (publication number: CN114603041B), an automatic production line equipment for freezer back panels is disclosed, including: a loading device, a punching device, a right-angle bending device, and an unloading device. This patent and existing equipment both adopt a combined distribution of multiple groups of equipment. The punching device and the right-angle bending device are at different stations. At the same time, during the back panel cutting process, burrs are likely to remain on the edge of the metal plate, which not only affects the appearance but also may have an adverse impact on subsequent processes such as bending and spraying, resulting in uneven coating or poor back panel assembly. Often, a deburring station needs to be set up, which not only has a high cost but also occupies a large area of the equipment. After cutting, the back panel needs to be repositioned at the right-angle bending, and the production efficiency is low. Summary of the Invention

[0004] The purpose of the present invention is: to solve the above problems, the present invention provides an automatic production line equipment for freezer back panels.

[0005] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0006] An automatic production line equipment for freezer back panels, including a frame. An blanking head and a bending punch are arranged at the inner top of the frame. The blanking head and the bending punch are both driven by hydraulic cylinders, and the blanking head is sleeved outside the bending punch. Four groups of blanking rods are arranged at the bottom of the blanking head. A blanking die and a bending frame are installed inside the frame, and the bending frame is located below the blanking die. An inner support plate that can be lifted is arranged inside the frame, and the inner support plate can pass through the blanking die and the bending frame;

[0007] On the four sides of the bottom of the blanking die, side supporting plates are slidably connected. At the four corners of the top of the bending frame, swing heads are rotatably installed. On the tops of the four groups of swing heads, two groups of long side rods and two groups of short side rods are respectively slidably connected. The two groups of long side rods are distributed diagonally. The width and length of the long side rod are both smaller than those of the blanking rod. The cross-section of the short side rod is the same as that of the long side rod. The outer surfaces of the upper halves of the long side rod and the short side rod are both provided with frosted surfaces.

[0008] Further, positioning guide plates are installed on the four sides of the inner wall of the blanking die.

[0009] Further, support sliding sleeves are provided on the four sides of the bottom of the blanking die. The side supporting plates are slidably connected in the support sliding sleeves. On the four sides of the outer wall of the blanking die, mounting plates are fixedly installed. On the outside of the mounting plates, telescopic cylinders are fixedly installed. The telescopic ends of the telescopic cylinders are fixedly connected to the side supporting plates.

[0010] Further, four groups of guide sleeves are fixedly installed on the inner bottom of the frame. A sliding rod is slidably connected inside the guide sleeve. The sliding rod is fixedly connected to the bottom of the inner supporting plate. A support spring is provided between the bottom of the sliding rod and the inner bottom of the guide sleeve. A limiting cylinder is fixedly installed on the outside of the guide sleeve. Two limiting jacks are penetrated and opened on the sliding rod. The limiting cylinder can be inserted into the limiting jacks.

[0011] Further, adsorption holes are opened on the top of the inner supporting plate.

[0012] Further, a driven sprocket is fixedly connected to the rotation center of the swing head. A transmission shaft is rotatably installed inside the bending frame. A driving sprocket is fixedly installed at one end of the transmission shaft. The driving sprocket is in transmission connection with the driven sprocket through a chain. A transmission worm gear is fixedly installed in the middle of the transmission shaft. A long rod driving shaft and a short rod driving shaft are rotatably installed inside the bending frame. Two worm parts are provided on both the long rod driving shaft and the short rod driving shaft. The worm part on the long rod driving shaft meshes with the transmission worm gear corresponding to the long side rod. The worm part on the short rod driving shaft meshes with the transmission worm gear corresponding to the short side rod. Both the long rod driving shaft and the short rod driving shaft are driven by motors.

[0013] Further, a sliding groove is opened on the top of the swing head. Sliders are provided at the bottoms of the long side rod and the short side rod. The sliders are slidably connected in the sliding groove. A top spring is provided between the slider and the inner wall of the sliding groove. Rectifying stoppers are fixedly installed on the four sides of the bending frame. The rectifying stoppers can abut against the corresponding long side rod and short side rod.

[0014] Further, the rectifying stopper is designed as an overall arc shape. The center of the arc coincides with the rotation center of the swing head. The rectifying stopper is composed of a vertical part, a rectifying part and a bending part from top to bottom.

[0015] Further, the bending punch is designed as a quadrangular frustum.

[0016] The beneficial effects of the present invention are as follows:

[0017] In the present invention, a blanking die and a bending frame are arranged up and down, an inner support plate and side support plates support the back plate, blanking holes are formed between adjacent side support plates, and a bending punch clamps the upper surface of the back plate. Then, a blanking head inserts into the blanking holes through four groups of blanking rods to blank the four corners of the back plate. After blanking, the bending punch presses the back plate down to the positions of the long side rod and the short side rod. The long side rod and the short side rod swing reciprocally to deburr the four corners. Finally, it is pressed into the bending frame for four-side bending. Blanking, deburring, and bending can be achieved in the same device, the occupied area of the device is small, and the production efficiency is high.

[0018] In the present invention, when the long side rod and the short side rod swing to the vertical state, the cut openings at the four corners of the back plate can be deburred. When the long side rod and the short side rod swing to the horizontal state, the back plate can be bent, and no additional deburring equipment is required, so the manufacturing cost is low.

[0019] In the present invention, the bending punch presses and bends the back plate. After bending, the long side rod and the short side rod swing upward, which can perform secondary bending on the bent part, and the bending accuracy is high. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is an exploded view of the overall structure of the present invention;

[0022] Figure 3 is a schematic diagram of the blanking head and the bending punch of the present invention;

[0023] Figure 4 is a schematic diagram of blanking the four corners of the refrigerator back plate of the present invention;

[0024] Figure 5 is a schematic diagram of deburring the four corners of the refrigerator back plate of the present invention;

[0025] Figure 6 is a schematic diagram of bending the refrigerator back plate of the present invention;

[0026] Figure 7 is an exploded view of the blanking die of the present invention;

[0027] Figure 8 is a schematic diagram of the sectional structure of the guide sleeve of the present invention;

[0028] Figure 9 is a schematic diagram of the structure of the bending frame of the present invention;

[0029] Figure 10 is an exploded view of the structure of the bending frame of the present invention;

[0030] Figure 11It is a schematic diagram of the swing head and long side rod structure of the present invention;

[0031] Figure 12 It is a schematic diagram of the correction stopper of the present invention.

[0032] Reference numerals: 1, frame; 2, blanking head; 3, bending punch; 4, blanking die; 41, positioning guide plate; 42, support sliding sleeve; 43, mounting plate; 44, telescopic cylinder; 45, side support plate; 5, inner support plate; 51, adsorption hole; 6, bending frame; 61, swing head; 62, long side rod; 63, short side rod; 64, top spring; 65, slider; 66, driven sprocket; 67, transmission shaft; 68, driving sprocket; 69, transmission worm; 610, long rod driving shaft; 611, short rod driving shaft; 7, guide sleeve; 71, sliding rod; 72, support spring; 73, limit cylinder; 74, limit jack; 8, correction stopper; 81, vertical part; 82, correction part; 83, bending part. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] Embodiment 1, as Figures 1 - 12 shown, an automatic production line device for a refrigerator back panel includes a frame 1. An inner top of the frame 1 is provided with a blanking head 2 and a bending punch 3. Both the blanking head 2 and the bending punch 3 are driven by hydraulic cylinders, and the blanking head 2 is sleeved outside the bending punch 3. Four blanking rods are provided at the bottom of the blanking head 2. A blanking die 4 and a bending frame 6 are installed inside the frame 1. The bending frame 6 is located below the blanking die 4. An inner support plate 5 capable of lifting is provided inside the frame 1, and the inner support plate 5 can pass through the blanking die 4 and the bending frame 6;

[0035] Side support plates 45 are slidably connected to four sides of the bottom of the blanking die 4. Swing heads 61 are rotatably installed at four corners of the top of the bending frame 6. Two long side rods 62 and two short side rods 63 are respectively slidably connected to the tops of the four swing heads 61. The two long side rods 62 are diagonally distributed. The width and length of the long side rod 62 are both smaller than those of the blanking rod. The cross-section of the short side rod 63 is the same as that of the long side rod 62. The outer surfaces of the upper halves of the long side rod 62 and the short side rod 63 are both provided with frosted surfaces.

[0036] Four-corner blanking: The manipulator places the back plate on the blanking die 4. At this time, the inner support plate 5 and the four groups of side support plates 45 serve as the support bottom plates of the blanking die 4, and blanking holes are formed between the adjacent side support plates 45 and the inner wall of the blanking die 4. Then, the hydraulic cylinder drives the bending punch 3 to press on the back plate to clamp the back plate. Then, another group of hydraulic cylinders drives the blanking head 2 to descend, and the blanking head 2 drives the four groups of blanking rods to descend. The four groups of blanking rods are simultaneously inserted into the four groups of blanking holes for four-corner blanking. After blanking is completed, the blanking head 2 resets, and the side support plates 45 move away from the inner support plate 5 so that the back plate can pass through the blanking die 4.

[0037] Deburring: The inner support plate 5 and the bending punch 3 clamp the back plate and descend, making the blanking opening descend to the position of the short side rod 63. Since the width and length of the long side rod 62 are both smaller than those of the blanking rod, there is a certain distance between the long side rod 62 and the short side rod 63 and the blanking opening. At this time, the swing head 61 drives the long side rod 62 and the short side rod 63 to swing reciprocally in a small amplitude, and the long side rod 62 and the short side rod 63 slide reciprocally relative to the swing head 61 in a small amplitude. The deburring and polishing of the two blanking edges of the blanking opening can be just achieved through the abrasive surface.

[0038] Bending: After deburring is completed, the inner support plate 5 and the bending punch 3 clamp the back plate and first rise. When the back plate exceeds the long side rod 62, the swing head 61 drives the long side rod 62 and the short side rod 63 to swing to the horizontal state. At this time, the long side rod 62 and the short side rod 63 form a blanking frame. Then, the inner support plate 5 and the bending punch 3 clamp the back plate and descend. When the bending punch 3 is inserted into the blanking frame, the four sides of the back plate are simultaneously bent preliminarily. Then, the swing head 61 is controlled to swing. The swing head 61 drives the long side rod 62 and the short side rod 63 to swing upward, and the long side rod 62 and the short side rod 63 slide relative to the swing head 61, and the long side rod 62 and the short side rod 63 slide into the inside of the blanking frame to perform secondary bending on the back plate. The bending effect is good. After bending is completed, the bending punch 3 resets, and the manipulator unloads the material.

[0039] Therefore, the equipment of the present invention can simultaneously achieve blanking, deburring and bending. The equipment occupies a small area, has a low manufacturing cost, saves the transfer time between different workstations in the middle, and has a high production efficiency.

[0040] Embodiment 2, on the basis of the above embodiment, further includes that positioning guide plates 41 are installed on the four sides of the inner wall of the blanking die 4. Through this design, the back plate can be automatically guided to the middle position of the blanking die 4, and the blanking accuracy is high.

[0041] Embodiment 3, on the basis of the above embodiment, further includes that support sliding sleeves 42 are arranged on the four sides of the bottom of the blanking die 4. The side support plates 45 are slidably connected in the support sliding sleeves 42. Installation plates 43 are fixedly installed on the four sides of the outer wall of the blanking die 4. A telescopic cylinder 44 is fixedly installed on the outside of the installation plate 43. The telescopic end of the telescopic cylinder 44 is fixedly connected with the side support plate 45.

[0042] By controlling the operation of the telescopic cylinder 44, the telescopic cylinder 44 drives the side support plate 45 away from the inner support plate 5, so that the back plate can pass through the punching die 4. During punching, the supporting sleeve 42 can support the side support plate 45 to ensure that the side support plate 45 is stable in load bearing.

[0043] Embodiment 4, on the basis of the above embodiment, further includes: four groups of guide sleeves 7 are fixedly installed on the inner bottom of the frame 1, and the guide sleeves 7 are internally slidably connected with a slide rod 71, the slide rod 71 is fixedly connected to the bottom of the inner support plate 5, and a support spring 72 is arranged between the bottom of the slide rod 71 and the inner bottom of the guide sleeve 7, and a limit cylinder 73 is fixedly installed on the outer side of the guide sleeve 7, and two groups of limit holes 74 are opened through the slide rod 71, and the limit cylinder 73 can be inserted into the limit hole 74.

[0044] Through the arrangement of this embodiment, under the action of the supporting spring 72, it is only necessary to control the lifting and lowering of the bending punch 3 to make the inner support plate 5 and the bending punch 3 clamping the back plate to lift and lower. The control is simple, and during punching, the telescopic end of the limit cylinder 73 is inserted into the lower limit hole 74, and during deburring, the limit cylinder 73 is inserted into the upper limit hole 74, to ensure that the inner support plate 5 is stably supported and the back plate is stably clamped, to ensure that the back plate will not be displaced during punching and deburring.

[0045] Embodiment 5, based on the above embodiment, further includes that a suction hole 51 is opened on the top of the inner support plate 5, and the setting of the suction hole 51 can further improve the clamping force of the back plate.

[0046] Embodiment 6, on the basis of the above embodiment, further includes: a driven sprocket 66 is fixedly connected at the rotation center of the swing head 61, a transmission shaft 67 is rotatably installed inside the bending frame 6, a driving sprocket 68 is fixedly installed at one end of the transmission shaft 67, the driving sprocket 68 is transmission-connected to the driven sprocket 66 through a chain, a transmission worm gear 69 is fixedly installed in the middle of the transmission shaft 67, a long rod drive shaft 610 and a short rod drive shaft 611 are rotatably installed inside the bending frame 6, two groups of worm parts are arranged on the long rod drive shaft 610 and the short rod drive shaft 611, the worm part on the long rod drive shaft 610 is meshed with the transmission worm gear 69 corresponding to the long side rod 62, the worm part on the short rod drive shaft 611 is meshed with the transmission worm gear 69 corresponding to the short side rod 63, and the long rod drive shaft 610 and the short rod drive shaft 611 are both driven by motors.

[0047] Furthermore, a slide groove is provided at the top of the swing head 61, and sliders 65 are provided at the bottom of the long side rod 62 and the short side rod 63. The slider 65 is slidably connected in the slide groove, and a top spring 64 is provided between the slider 65 and the inner wall of the slide groove. Correction stops 8 are fixedly installed on the four sides of the bending frame 6, and the correction stops 8 can contact the corresponding long side rod 62 and short side rod 63.

[0048] Further, the correction stopper 8 is integrally designed in an arc shape, and the center of the arc coincides with the rotation center of the swing head 61. The correction stopper 8 is composed of a vertical portion 81, a correction portion 82, and a bending portion 83 from top to bottom.

[0049] Deburring: The inner support plate 5 and the bending punch 3 hold the back plate and descend, causing the punching opening to descend to the position of the short side rod 63. Since the width and length of the long side rod 62 are both smaller than those of the punching rod, there is a certain distance between the long side rod 62 and the short side rod 63 and the punching opening. At this time, the positive and reverse rotations of the long rod drive shaft 610 and the short rod drive shaft 611 are controlled by the motor. The long rod drive shaft 610 drives the two groups of transmission worm wheels 69 to rotate through the worm portion. The two groups of transmission worm wheels 69 drive the two groups of transmission shafts 67 to rotate. The two groups of transmission shafts 67 drive the swing heads 61 below the two long side rods 62 to swing synchronously and reversely through the driving sprockets 68 and the driven sprockets 66, and both swing towards the back plate direction. Similarly, the two short side rods 63 also swing towards the back plate direction synchronously. The long side rod 62 and the short side rod 63 swing reciprocally with a small amplitude to perform deburring on the punching edges parallel to the rotation axes of the long side rod 62 and the short side rod 63. During the reciprocating swing of the long side rod 62 and the short side rod 63, they will repeatedly contact the vertical portion 81 and the correction portion 82. When contacting the correction portion 82, the correction portion 82 will squeeze the long side rod 62 and the short side rod 63 towards the back plate direction. At this time, the worn surface can contact another punching edge for deburring. Therefore, through the setting of this embodiment, only by controlling the reciprocating swing of the swing head 61, deburring of two punching edges can be achieved simultaneously, with a simple structure and high deburring efficiency.

[0050] Bending: After deburring, the inner support plate 5 and the bending punch 3 clamp the back plate and rise first. When the back plate exceeds the long side rod 62, the swing head 61 drives the long side rod 62 and the short side rod 63 to swing to the horizontal state. Since there is a certain distance between the long side rod 62 and the short side rod 63 and the punching opening, the distance between the long side rod 62 and the short side rod 63 that swing to the horizontal and the edge of the bending punch 3 is too large. Therefore, the long side rod 62 and the short side rod 63 need to move inward a small distance to ensure that the distance between the long side rod 62 and the short side rod 63 and the edge of the bending punch 3 meets the bending spacing. So when the long side rod 62 and the short side rod 63 swing to the horizontal state, the long side rod 62 and the short side rod 63 move from the vertical part 81 to the bending part 83, and the bending part 83 will push the long side rod 62 and the short side rod 63 inward. At this time, the long side rod 62 and the short side rod 63 form a punching border. Then the inner support plate 5 and the bending punch 3 clamp the back plate and descend. When the bending punch 3 is inserted into the punching border, the four sides of the back plate are simultaneously bent preliminarily. Then, control the swing head 61 to swing. The swing head 61 drives the long side rod 62 and the short side rod 63 to swing upward. When the long side rod 62 and the short side rod 63 move from the bending part 83 to the correction part 82, the correction part 82 will push the long side rod 62 and the short side rod 63 to continue moving inward. At this time, the long side rod 62 and the short side rod 63 will push the part of the first bending inward to bend again, and the back plate is bent twice, and the bending effect is good.

[0051] Embodiment 7, on the basis of the above embodiments, further includes that the bending punch 3 is designed as a quadrangular frustum. Through this design, there is enough space for the second bending of the back plate, and the bending accuracy is high.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic production line equipment for refrigerator back panels, comprising a frame (1), characterized in that: The inner top of the frame (1) is provided with a punching head (2) and a bending punch (3), both of which are driven by hydraulic cylinders, and the punching head (2) is sleeved on the outside of the bending punch (3), and the bottom of the punching head (2) is provided with four sets of punching rods, and the frame (1) is provided with a punching die (4) and a bending frame (6), and the bending frame (6) is located below the punching die (4), and the frame (1) is provided with a lifting inner support plate (5), and the inner support plate (5) can pass through the punching die (4) and the bending frame (6); The four sides of the bottom of the punching die (4) are slidably connected to side support plates (45), the four corners of the top of the bending frame (6) are rotatably mounted with swing heads (61), the tops of the four groups of swing heads (61) are respectively slidably connected to two groups of long side rods (62) and two groups of short side rods (63), the two groups of long side rods (62) are diagonally distributed, the width and length of the long side rods (62) are smaller than the punching rods, the cross section of the short side rods (63) is the same as that of the long side rods (62), and the outer surfaces of the upper parts of the long side rods (62) and the short side rods (63) are both provided with frosted surfaces; After the four corners are blanked, the swing head (61) drives the long side rod (62) and the short side rod (63) to swing back and forth, and the blanking edges of the blanking openings of the four corners of the back plate are deburred by frosting; After the deburring is completed, the swing head (61) drives the long side rod (62) and the short side rod (63) to swing to a horizontal state, and the back plate is bent; After bending, the long side rod (62) and the short side rod (63) swing upward to perform a secondary bending on the bent portion of the back plate.

2. The automatic production line equipment for refrigerator back panels according to claim 1 is characterized in that: Positioning guide plates (41) are installed around the inner wall of the punching die (4).

3. The automatic production line equipment for refrigerator back panels according to claim 2 is characterized in that: Support sleeves (42) are provided around the bottom of the punching die (4), and the side support plate (45) is slidably connected to the support sleeves (42). Mounting plates (43) are fixedly installed around the outer wall of the punching die (4), and a telescopic cylinder (44) is fixedly installed on the outer side of the mounting plate (43). The telescopic end of the telescopic cylinder (44) is fixedly connected to the side support plate (45).

4. The automatic production line equipment for refrigerator back panels according to claim 1, characterized in that: Four groups of guide sleeves (7) are fixedly mounted on the inner bottom of the frame (1); a slide rod (71) is slidably connected inside the guide sleeve (7); the slide rod (71) is fixedly connected to the bottom of the inner support plate (5); a support spring (72) is arranged between the bottom of the slide rod (71) and the inner bottom of the guide sleeve (7); a limit cylinder (73) is fixedly mounted on the outer side of the guide sleeve (7); two groups of limit holes (74) are penetrated through the slide rod (71); the limit cylinder (73) can be plugged into the limit hole (74).

5. The automatic production line equipment for refrigerator back panels according to claim 4, characterized in that: A suction hole (51) is provided on the top of the inner support plate (5).

6. The automatic production line equipment for refrigerator back panels according to claim 1, characterized in that: A driven sprocket (66) is fixedly connected to the rotation center of the swing head (61), a transmission shaft (67) is rotatably mounted inside the bending frame (6), a driving sprocket (68) is fixedly mounted on one end of the transmission shaft (67), the driving sprocket (68) is transmission-connected to the driven sprocket (66) via a chain, a transmission worm gear (69) is fixedly mounted in the middle of the transmission shaft (67), and a long rod drive shaft (69) is rotatably mounted inside the bending frame (6). 10) and the short rod drive shaft (611), and two sets of worm gear parts are arranged on the long rod drive shaft (610) and the short rod drive shaft (611), the worm gear part on the long rod drive shaft (610) is meshed with the transmission worm wheel (69) corresponding to the long side rod (62), and the worm gear part on the short rod drive shaft (611) is meshed with the transmission worm wheel (69) corresponding to the short side rod (63), and the long rod drive shaft (610) and the short rod drive shaft (611) are both driven by a motor.

7. The automatic production line equipment for refrigerator back panels according to claim 6, characterized in that: A slide groove is provided at the top of the swing head (61), and a slider (65) is provided at the bottom of each of the long side rod (62) and the short side rod (63). The slider (65) is slidably connected in the slide groove, and a top spring (64) is provided between the slider (65) and the inner wall of the slide groove. Correction stoppers (8) are fixedly installed on the four sides of the bending frame (6), and the correction stoppers (8) can contact the corresponding long side rod (62) and the short side rod (63).

8. The automatic production line equipment for refrigerator back panels according to claim 7, characterized in that: The correction stopper (8) is designed as an arc as a whole, the center of the arc coincides with the rotation center of the swing head (61), and the correction stopper (8) is composed of a vertical portion (81), a correction portion (82) and a bending portion (83) from top to bottom.

9. The automatic production line equipment for refrigerator back panels according to any one of claims 1 to 8, characterized in that: The bending punch (3) is designed as a quadrangular pyramid.

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