A feeding and discharging system suitable for a bending center and the bending center

Abstract

The utility model discloses a kind of feeding system and bending center suitable for bending center, feeding system includes feeding mechanism, positioning mechanism, feeding mechanism and discharging mechanism, feeding mechanism includes feeding table, feeding clamping component and feeding drive component, feeding drive component is used to drive feeding clamping component reciprocating movement along feeding direction, feeding table is provided with the feeding position, discharging position and processing position that feeding clamping component's moving track interval is set;Positioning mechanism is located in feeding position, and positioning mechanism is used to position the plate on feeding position;Feeding mechanism is used to move and send the plate to be bent to feeding position;Discharging mechanism is used to move out the plate that is well processed from discharging position;Feeding mechanism and discharging mechanism are misaligned setting along the moving track of feeding clamping component.The utility model can continuously and efficiently complete the feeding, positioning, bending feeding and discharging process of plate, improve bending processing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of bending equipment, and in particular to a loading and unloading system and a bending center suitable for bending centers. Background Technology

[0002] In sheet metal bending, the traditional processes of feeding, bending, and unloading are all done manually, which is inefficient. Currently, there are machines on the market that can automatically feed, bend, and unload sheets. However, some machines use a single mechanism to complete both feeding and unloading, which requires waiting for each other, affecting the efficiency of feeding and unloading. Furthermore, the sheets need to be positioned before feeding and bending. Existing technologies are difficult to efficiently complete the feeding, positioning, feeding, and unloading processes of sheets in high-speed production. Utility Model Content The purpose of this utility model is to provide a loading and unloading system and a bending center suitable for bending centers, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0003] The technical solution adopted to solve the above-mentioned technical problems is as follows: This utility model provides a loading and unloading system suitable for bending centers, comprising: The feeding mechanism includes a feeding table for supporting the sheet metal, a feeding clamping assembly for clamping the sheet metal on the feeding table, and a feeding drive assembly that is pulsatorically connected to the feeding clamping assembly. The feeding drive assembly is used to drive the feeding clamping assembly to reciprocate along the feeding direction. The feeding table is provided with loading positions, unloading positions and processing positions that are spaced apart along the movement trajectory of the feeding clamping assembly. A positioning mechanism is provided at the loading position, and the positioning mechanism is used to position the plate on the loading position; A feeding mechanism is used to transfer the sheet metal to be bent to the feeding position; The unloading mechanism is used to move the processed sheet material out from the unloading device; The feeding mechanism and the unloading mechanism are staggered along the moving trajectory of the feeding clamping assembly.

[0004] The beneficial effects of the loading and unloading system of this utility model are: In operation, the feeding mechanism moves the sheet metal to be bent to the feeding position, and then the positioning mechanism positions the sheet metal at the feeding position. The feeding clamping component then clamps the positioned sheet metal and transports it to the processing position for bending. After processing, the processed sheet metal is transported to the unloading position, and the unloading mechanism moves the processed sheet metal out of the unloading position. At the same time, the feeding mechanism moves a new sheet metal to the feeding position. The feeding and unloading mechanisms can operate synchronously to perform the feeding and unloading operations respectively, improving the cycle time of feeding and unloading. Before feeding and bending, the positioning mechanism positions the sheet metal at the feeding position to continuously and efficiently complete the feeding, positioning, bending feeding and unloading processes of the sheet metal, thereby improving the bending processing efficiency.

[0005] As a further improvement to the above technical solution, the feeding mechanism includes a feeding clamping assembly for clamping the sheet metal and a feeding moving assembly for driving the feeding clamping assembly to move along a first horizontal and vertical direction. The unloading mechanism includes an unloading clamping assembly for clamping the sheet metal and an unloading moving assembly for driving the loading clamping assembly to move along a first horizontal and vertical direction. The first lateral direction and the feeding direction are perpendicular to each other on the horizontal plane.

[0006] As a further improvement to the above technical solution, the feeding clamping assembly includes a feeding suction cup structure for picking up the plate and a feeding rotation structure for driving the feeding suction cup structure to rotate around a vertical axis. The material feeding clamping assembly includes a material feeding suction cup structure for picking up the sheet material and a material feeding rotation structure for driving the material feeding suction cup structure to rotate around a vertical axis.

[0007] As a further improvement to the above technical solution, the feeding mechanism also includes a feeding platform frame located on one side of the feeding table along the first transverse direction, the feeding platform frame being used to store the sheet metal to be bent; The unloading mechanism also includes an unloading platform located on the other side of the feeding table along the first transverse direction, the unloading platform being used to store the processed sheet metal.

[0008] As a further improvement to the above technical solution, the feeding table is provided with a feeding groove extending along the feeding direction, and the feeding clamping assembly is provided in the feeding groove. The feeding clamping assembly includes a feeding suction cup structure for adsorbing the bottom surface of the plate.

[0009] As a further improvement to the above technical solution, the feeding clamping assembly also includes a feeding rotation structure, which is used to drive the feeding suction cup structure to rotate around a vertical axis.

[0010] As a further improvement to the above technical solution, the positioning mechanism includes two positioning blocks arranged at a first lateral interval on the feeding platform, and a positioning drive structure for driving the two positioning blocks to move closer and further apart from each other. Each of the two positioning blocks has a right-angled positioning slot on the opposite side. The positioning slot has a first right-angled groove side extending along the first lateral direction and a second right-angled groove side extending along the feeding direction. The first right-angled groove side faces the processing position.

[0011] As a further improvement to the above technical solution, a magnet is provided on the first right-angle groove edge, and the magnet is used to magnetically attract the plate along the side edge extending in the first transverse direction.

[0012] As a further improvement to the above technical solution, the positioning block is provided with an embedding groove, and the magnet is detachably installed in the embedding groove.

[0013] In addition, this utility model also proposes a bending center, including the loading and unloading system and a bending machine, which is located at the processing position and is used to bend the sheet metal.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a top view of an embodiment of the bending center provided by this utility model; Figure 2 This is a side view of an embodiment of the bending center provided by this utility model; Figure 3 The bending center provided by this utility model has its top view below the loading and unloading mechanisms deleted in one embodiment; Figure 4 yes Figure 3 A magnified view of part A in the middle; Icon labels: Feeding mechanism 100; feeding table 110; feeding trough 111; feeding drive assembly 120; feeding clamping assembly 130; feeding suction cup structure 131; Positioning mechanism 200; positioning block 210; positioning slot 211; embedding slot 212; first right-angle slot edge 2111; second right-angle slot edge 2112; magnet 220; Feeding mechanism 300; feeding clamping assembly 310; feeding suction cup structure 311; feeding rotation structure 312; feeding moving assembly 320; feeding transverse drive module 321; feeding lifting module 322; feeding platform 330; Unloading mechanism 400; unloading clamping assembly 410; unloading suction cup structure 411; unloading rotation structure 412; unloading moving assembly 420; unloading lateral movement drive module 421; unloading lifting module 422; unloading platform 430; 500 for the board material; 600 bending machine. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0021] Existing technologies are insufficient for efficiently completing the loading, positioning, feeding, and unloading processes of sheet 500 in high-frequency production. Therefore, this utility model proposes a loading and unloading system suitable for bending centers, which can continuously and efficiently complete the loading, positioning, bending feeding, and unloading processes of sheet 500, thereby improving bending processing efficiency.

[0022] like Figures 1 to 4 As shown, the loading and unloading system of this utility model includes a feeding mechanism 100, a positioning mechanism 200, a loading mechanism 300, and an unloading mechanism 400.

[0023] The feeding mechanism 100 in this embodiment includes a feeding platform 110 for supporting and conveying the sheet material 500, a feeding clamping assembly 130 for clamping the sheet material 500 on the feeding platform 110, and a feeding drive assembly 120 that is connected to the feeding clamping assembly 130. Specifically, the feeding platform 110 in this embodiment is horizontally arranged, and a conveying table is provided on the top of the feeding platform 110. The sheet material 500 is placed on the table of the feeding platform 110 for feeding.

[0024] The feeding drive assembly 120 is used to drive the feeding clamping assembly 130 to move back and forth along the feeding direction. In this embodiment, the feeding direction is defined as the front and back direction. The feeding drive assembly 120 drives the feeding clamping assembly 130 to move along the front and back direction. The feeding table 110 is provided with loading positions, unloading positions and processing positions that are spaced apart along the moving trajectory of the feeding clamping assembly 130. It can be understood that the loading positions, unloading positions and processing positions are arranged at intervals along the front and back direction. The feeding clamping assembly 130 can clamp the sheet 500 on the feeding table 110 and transport it from the loading position to the processing position for bending processing, and from the processing position to the unloading position.

[0025] In this embodiment, the positioning mechanism 200 is located at the loading position and is used to position the plate 500 on the loading position.

[0026] The feeding mechanism 300 is used to transfer the sheet 500 to be bent to the feeding position, and the unloading mechanism 400 is used to move the processed sheet 500 out from the unloading position. In this embodiment, the feeding mechanism 300 and the unloading mechanism 400 are staggered along the moving trajectory of the feeding clamping component 130. It can be understood that the feeding mechanism 300 corresponds to the position of the feeding position, and the unloading mechanism 400 corresponds to the position of the unloading position. The feeding mechanism 300 and the unloading mechanism 400 are also spaced apart in the front-back direction, so that the feeding mechanism 300 and the unloading mechanism 400 will not interfere with each other, and the feeding mechanism 300 and the unloading mechanism 400 can operate synchronously.

[0027] In use, the feeding mechanism 300 transfers the sheet metal 500 to be bent to the feeding position, and then the positioning mechanism 200 positions the sheet metal 500 at the feeding position. The feeding clamping component 130 then clamps the positioned sheet metal 500 and transports it to the processing position for bending. After processing, the processed sheet metal 500 is transported to the unloading position, and the unloading mechanism 400 moves the processed sheet metal 500 out of the unloading position. At the same time, the feeding mechanism 300 transfers a new sheet metal 500 to the feeding position. The feeding mechanism 300 and the unloading mechanism 400 can operate synchronously to perform the feeding and unloading operations respectively, improving the cycle time of feeding and unloading. Before feeding and bending, the positioning mechanism 200 positions the sheet metal 500 at the feeding position. Thus, this utility model can continuously and efficiently complete the feeding, positioning, bending feeding and unloading processes of the sheet metal 500, improving the bending processing efficiency.

[0028] The feeding mechanism 300 includes a feeding clamping component 310 and a feeding moving component 320. The feeding clamping component 310 is used to clamp the board 500, while the feeding moving component 320 drives the feeding clamping component 310 to move along the first horizontal and vertical directions. In this embodiment, the first horizontal direction is defined as the left and right direction. It can be understood that the feeding moving component 320 can drive the feeding clamping component 310 to move in the vertical and left and right directions, so that the feeding moving component 320 can move above the feeding position to place the board 500 on the feeding position, thereby realizing the feeding of the board 500.

[0029] The loading and moving component 320 in this embodiment includes a loading lateral movement drive module 321 and a loading lifting module 322. The loading lateral movement drive module 321 is used to drive the loading clamping component 310 to move in the left and right direction, while the loading lifting module 322 is used to drive the loading clamping component 310 to move in the vertical direction. The loading lateral movement drive module 321 and the loading lifting module 322 can be linear drive modules such as a motor screw structure or a linear motor.

[0030] The unloading mechanism 400 includes an unloading clamping component 410 and an unloading moving component 420. The unloading clamping component 410 is used to clamp the sheet 500, while the unloading moving component 420 is used to drive the unloading clamping component 410 to move in the left and right directions and the vertical direction, so that the unloading clamping component 410 can be moved above the unloading position to grab the sheet 500 on the unloading position and realize the unloading of the sheet 500.

[0031] The unloading moving component 420 in this embodiment includes an unloading lateral movement drive module 421 and an unloading lifting module 422. The unloading lateral movement drive module 421 is used to drive the unloading clamping component 410 to move in the left and right direction, while the unloading lifting module 422 is used to drive the unloading clamping component 410 to move in the vertical direction. The unloading lateral movement drive module 421 and the unloading lifting module 422 can be linear drive modules such as a motor screw structure or a linear motor.

[0032] Furthermore, the feeding clamping assembly 310 of this embodiment includes a feeding suction cup structure 311 and a feeding rotation structure 312. In this embodiment, the feeding suction cup structure 311 is used to pick up the plate 500, while the feeding rotation structure 312 is used to drive the feeding suction cup structure 311 to rotate around the vertical axis. After the feeding suction cup structure 311 picks up the plate 500, the feeding suction cup structure 311 can be driven to rotate according to the feeding posture requirements, so as to drive the plate 500 to rotate to different postures and place it on the feeding position.

[0033] The unloading clamping component 410 of this embodiment includes an unloading suction cup structure 411 and an unloading rotation structure 412. In this embodiment, the unloading suction cup structure 411 is used to pick up the sheet 500, and the unloading rotation structure 412 is used to drive the unloading suction cup structure 411 to rotate around the vertical axis. During unloading, the sheet 500 can be rotated according to the stacking requirements to facilitate stacking.

[0034] The feeding rotary structure 312 and the unloading rotary structure 412 can be driven directly by a rotary motor, or by a motor and gearbox, etc.

[0035] Furthermore, the feeding mechanism 300 of this embodiment also includes a feeding platform 330 located on one side of the feeding table 110 in the left-right direction. The feeding platform 330 is used to store the sheet metal 500 to be bent. Before feeding, the sheet metal 500 to be processed is stacked on the feeding platform 330. Then, the feeding moving component 320 drives the feeding suction cup structure 311 to move laterally to the top of the feeding platform 330, and then drives the unloading suction cup structure 411 to descend to pick up the sheet metal 500. After that, the sheet metal 500 is transferred to the feeding table 110.

[0036] The unloading mechanism 400 also includes an unloading platform 430 located on the other side of the feeding platform 110 in the left-right direction. The unloading platform 430 is used to store the processed sheet metal 500. During unloading, the unloading moving component 420 drives the unloading suction cup structure 411 to grab the processed sheet metal 500 on the unloading position, and then drives the unloading suction cup structure 411 to move above the unloading platform 430 to stack the sheet metal 500 on the unloading platform 430.

[0037] In some other embodiments, the unloading table 430 may be replaced with the next process equipment for processing the sheet 500.

[0038] In this embodiment, the feeding table 110 is provided with a feeding groove 111 extending along the feeding direction. The feeding clamping assembly 130 is provided in the feeding groove 111. The feeding clamping assembly 130 includes a feeding suction cup structure 131 for adsorbing the bottom surface of the board 500. In this embodiment, the board 500 is clamped by the feeding suction cup structure 131.

[0039] Furthermore, the feeding clamping assembly 130 in this embodiment also includes a feeding rotation structure (not shown in the figure). The feeding rotation structure is used to drive the feeding suction cup structure 131 to rotate around the vertical axis. When performing bending feeding, the feeding rotation structure can drive the plate 500 to rotate so as to realize bending processing on different sides of the plate 500.

[0040] The feeding drive assembly 120 can adopt a linear drive structure such as a lead screw or a linear motor, while the feeding rotation structure can adopt a direct drive method using a rotary motor, or a drive method using a motor and a gearbox, etc.

[0041] Among them, such as Figure 3 and Figure 4 As shown, the positioning mechanism 200 of this embodiment includes two positioning blocks 210 arranged at intervals along the left and right direction on the feeding table 110, and a positioning drive structure (not shown) for driving the two positioning blocks 210 to move closer and further apart. Each of the two positioning blocks 210 has a right-angled positioning slot 211 on the opposite side. The positioning slot 211 has a first right-angled slot side 2111 extending along the left and right direction and a second right-angled slot side 2112 extending along the front and back direction. The first right-angled slot side 2111 faces the processing position. When positioning the plate 500, after the plate 500 is placed in the loading position, the positioning drive structure drives the two positioning blocks 210 to move closer to each other, so that the two right angles on one side of the plate 500 match and abut against the two positioning slots 211 respectively, so as to realize the positioning of the plate 500 on the feeding table 110.

[0042] To improve positioning efficiency, such as Figure 4 As shown, in this embodiment, a magnet 220 is provided on the first right-angled groove edge 2111. The magnet 220 is used to magnetically attract the plate 500 along the side edge extending in the first lateral direction. Since the feeding mechanism 300 grasps the plate 500, it can only limit the general posture of the plate 500. Figure 3As shown, after the plate 500 is placed on the loading position, the plate 500 is magnetically attracted by the magnet 220, so that one side of the plate 500 abuts against the first right-angle groove edge 2111, thereby positioning the plate 500 in the front-back direction and limiting the posture of the plate 500, so that the plate 500 extends in the left-right direction. Then, the positioning drive structure drives the two positioning blocks 210 to move closer to each other, and the two second right-angle groove edges 2112 abut against the left and right sides of the plate 500 respectively, thereby positioning the plate 500 in the left-right direction.

[0043] This invention uses the magnetic attraction of magnet 220 to achieve front-back positioning of plate 500. The positioning drive structure drives two positioning blocks 210 to move closer to each other to achieve left-right positioning of plate 500. This can improve the positioning speed of plate 500. Existing methods generally use two-way servo positioning components, but this embodiment uses a single positioning drive structure, which can reduce manufacturing costs.

[0044] The positioning drive structure can use a bidirectional lead screw to synchronously drive the two positioning blocks 210 to move closer and further apart, or it can use two linear drive modules to drive the two positioning blocks 210 to move in the left and right directions respectively.

[0045] like Figure 4 As shown, the positioning block 210 in this embodiment is provided with an embedding groove 212, and the magnet 220 is detachably installed in the embedding groove 212. As the usage time increases, the magnetism of the magnet 220 will weaken, at which point the magnet 220 can be replaced.

[0046] like Figure 1 and Figure 2 As shown, this utility model also proposes a bending center, including the above-mentioned loading and unloading system, and also includes a bending machine 600, which is located at the processing position and is used to bend the sheet 500.

[0047] The working principle of the bending center of this utility model: The 500 sheets to be processed are pre-stacked on the loading table 330, such as... Figure 1As shown, during loading, the loading moving component 320 drives the loading suction cup structure 311 to move laterally above the loading platform 330, and then drives the unloading suction cup structure 411 to descend to pick up the plate 500. The plate 500 is then transferred to the loading position on the feeding platform 110. Magnets 220 magnetically attract the rear edge of the plate 500, causing the rear edge of the plate 500 to abut against the two first right-angle groove edges 2111, thus positioning the plate 500 in the front-back direction and limiting its posture, allowing it to extend in the left-right direction. Then, the positioning drive structure drives the two positioning blocks 210 to move closer together, and the two second right-angle groove edges 2112 abut against the left and right sides of the plate 500 respectively, thus positioning the plate 500 in the left-right direction. After positioning is completed, the feeding process begins. The suction cup structure 131 adsorbs the bottom surface of the sheet 500 and carries the sheet 500 to the processing position. The bending machine 600 performs bending processing, and the feeding rotation structure drives the sheet 500 to rotate, so as to achieve bending processing on different sides of the sheet 500. After processing, the feeding suction cup structure 131 moves the processed sheet 500 to the unloading position. Then, the unloading moving component 420 drives the unloading suction cup structure 411 to pick up the sheet 500 on the unloading position. After that, it drives the unloading suction cup structure 411 to move above the unloading table 430 and stack the sheet 500 on the unloading table 430. While performing bending processing and unloading operations, the loading moving component 320 drives the loading suction cup structure 311 to move new sheet 500 to the loading position for positioning.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A loading and unloading system suitable for bending centers, characterized in that, include: The feeding mechanism includes a feeding table for supporting the sheet metal, a feeding clamping assembly for clamping the sheet metal on the feeding table, and a feeding drive assembly that is pulsatorically connected to the feeding clamping assembly. The feeding drive assembly is used to drive the feeding clamping assembly to reciprocate along the feeding direction. The feeding table is provided with loading positions, unloading positions and processing positions that are spaced apart along the movement trajectory of the feeding clamping assembly. A positioning mechanism is provided at the loading position, and the positioning mechanism is used to position the plate on the loading position; A feeding mechanism is used to transfer the sheet metal to be bent to the feeding position; The unloading mechanism is used to move the processed sheet material out from the unloading device; The feeding mechanism and the unloading mechanism are staggered along the moving trajectory of the feeding clamping assembly.

2. The loading and unloading system according to claim 1, characterized in that: The feeding mechanism includes a feeding clamping assembly for clamping the sheet metal and a feeding moving assembly for driving the feeding clamping assembly to move along a first horizontal and vertical direction. The feeding mechanism includes a feeding clamping assembly for clamping the sheet metal and a feeding moving assembly for driving the feeding clamping assembly to move along a first horizontal and vertical direction. The first lateral direction and the feeding direction are perpendicular to each other on the horizontal plane.

3. The loading and unloading system according to claim 2, characterized in that: The feeding clamping assembly includes a feeding suction cup structure for picking up the sheet material and a feeding rotation structure for driving the feeding suction cup structure to rotate around a vertical axis. The material feeding clamping assembly includes a material feeding suction cup structure for picking up the sheet material and a material feeding rotation structure for driving the material feeding suction cup structure to rotate around a vertical axis.

4. The loading and unloading system according to claim 2, characterized in that: The feeding mechanism further includes a feeding platform frame located on one side of the feeding table along the first transverse direction, the feeding platform frame being used to store the sheet metal to be bent; The unloading mechanism also includes an unloading platform located on the other side of the feeding table along the first transverse direction, the unloading platform being used to store the processed sheet metal.

5. The loading and unloading system according to claim 1, characterized in that: The feeding platform is provided with a feeding groove extending along the feeding direction, and the feeding clamping assembly is provided in the feeding groove. The feeding clamping assembly includes a feeding suction cup structure for adsorbing the bottom surface of the board.

6. The loading and unloading system according to claim 5, characterized in that: The feeding clamping assembly also includes a feeding rotation structure, which is used to drive the feeding suction cup structure to rotate around a vertical axis.

7. The loading and unloading system according to claim 1, characterized in that: The positioning mechanism includes two positioning blocks arranged at a first lateral interval on the feeding platform, and a positioning drive structure for driving the two positioning blocks to move closer and further apart from each other. Each of the two positioning blocks has a right-angled positioning slot on the opposite side. The positioning slot has a first right-angled slot side extending along the first lateral direction and a second right-angled slot side extending along the feeding direction. The first right-angled slot side faces the processing position. The first lateral direction and the feeding direction are perpendicular to each other on the horizontal plane.

8. The loading and unloading system according to claim 7, characterized in that: A magnet is provided on the first right-angle groove edge, and the magnet is used to magnetically attract the plate along the side edge extending in the first transverse direction.

9. The loading and unloading system according to claim 8, characterized in that: The positioning block is provided with an embedding groove, and the magnet is detachably installed in the embedding groove.

10. A bending center, characterized in that: The system includes the loading and unloading system as described in any one of claims 1 to 9, and further includes a bending machine located at the processing position, the bending machine being used for bending the sheet metal.

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