Bending machine having automatic tool-assembling structure

Abstract

A bending machine having an automatic tool-assembling structure. Two servo motors (50) drive corresponding lead screw (40) to rotate back and forth, replacing the existing hydraulic driving mode; in addition, a first adjustment tool set (81) is arranged on a sliding block (30) in an up-down and back-and-forth flipping manner, and a second adjustment tool set (83) is arranged on the sliding block (30) in a transverse and back-and-forth movable manner and located beside the first adjustment tool set (81), such that a tool of an appropriate size can be automatically assembled on the basis of the size of a specific product to be processed, eliminating the need for manual tool changing.

Description

Bending machine with automatic blade assembly structure Technical Field

[0001] This invention relates to the field of bending machines, and in particular to a bending machine with an automatic blade-aligning structure. Background Technology

[0002] A bending machine is a machine capable of bending thin plates. Its structure mainly consists of a frame, hydraulic system, electrical system, slide mechanism, synchronization mechanism, upper and lower die mechanism, back gauge, and front support frame. The upper and lower die mechanism includes an upper pressure knife assembly and a lower bending die. Different upper and lower bending dies are customized according to different bending requirements. During operation, the slide moves up and down to allow the cutting tool to complete the bending operation on the product.

[0003] Existing bending machines typically use hydraulic drive to move the slider up and down. Hydraulic transmission is not only slow, resulting in low bending accuracy, but also has complex oil circuits that are inconvenient to maintain. Furthermore, hydraulic transmission generates significant noise during operation, affecting the operator's working environment. Additionally, when bending products of different sizes, manual changing of different sized cutters is required to complete the bending process, impacting bending efficiency. Therefore, it is necessary to further improve the structure of existing bending machines. Technical solutions

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a bending machine with an automatic blade-aligning structure, which can effectively solve the problems of low bending accuracy, inconvenient maintenance, high working noise, and low bending processing efficiency of existing bending machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bending machine with an automatic blade-aligning structure includes a frame, a controller, a slider, two lead screws, two servo motors, two nut seats, two fixed sleeves, and a blade-aligning assembly. A lower blade seat is mounted on the frame. The controller is mounted on the frame. The slider is movably mounted on the frame and positioned above the lower blade seat. The two lead screws are arranged horizontally and rotatably on the frame. The two servo motors are mounted on the frame and connected to the controller, driving the corresponding lead screws to rotate. The two nut seats are respectively fitted onto the lower ends of the corresponding lead screws and move up and down with the rotation of the lead screws. The two fixed sleeves are fitted and fixed onto the corresponding nut seats and move up and down with the nut seats, with the lower ends of the two fixed sleeves fixed to the left and right sides of the slider, thereby driving the slider to move up and down. The tool assembly moves back and forth; it is mounted on the slider and moves back and forth with the slider, located directly above the lower tool holder, and connected to the controller; the tool assembly includes a first adjustable tool group, a first tool changing drive unit, a second adjustable tool group, and a second tool changing drive unit; the first adjustable tool group is mounted on the slider and can be flipped up and down, and includes multiple first tools arranged in sequence; the first tool changing drive unit is mounted on the slider and drives the first adjustable tool group to flip up and down; the second adjustable tool group is mounted on the slider and can move back and forth laterally, located beside the first adjustable tool group, and includes multiple second tools arranged in sequence laterally; the second tool changing drive unit is mounted on the slider and drives the second adjustable tool group to move back and forth laterally.

[0007] As a preferred embodiment, the frame is provided with two slide rails arranged on the left and right sides. Each fixed sleeve is provided with a slide block that cooperates with the slide rail. The fixed sleeve moves up and down back and forth under the drive of the nut seat through the cooperation of the slide block and the slide rail.

[0008] As a preferred embodiment, the slider has two vertically extending fixing grooves on its left and right sides, respectively. The upper end of each fixing groove is semi-circular, and each fixing groove has a semi-circular block at its upper end. A first connecting hole extending vertically is passed through the semi-circular block. A second connecting hole passes through the upper end face of the slider and the upper inner wall of the fixing groove. The second connecting hole and the first connecting hole are vertically aligned. The lower end of each of the two fixing sleeves is provided with an end cap. The lower end face of each end cap is integrally recessed with a semi-circular adapter groove. A semi-circular ball head is provided in the adapter groove. A third connecting hole extending vertically is passed through the ball head. The third connecting hole and the second connecting hole are vertically aligned. The upper bottom surface of the adapter groove has a first fixing hole extending upwards. The first fixing hole and the third connecting hole are vertically aligned. A first fixing bolt passes through the first connecting hole, the second connecting hole, the third connecting hole, and the first fixing hole from bottom to top, thereby fixing the fixing sleeve and the slider together. The diameters of the first connecting hole, the second connecting hole, and the third connecting hole are all larger than the diameter of the first fixing bolt.

[0009] As a preferred embodiment, the output end of the servo motor is connected to a first synchronous pulley, and the upper end of the lead screw is provided with a second synchronous pulley. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt, and the servo motor drives the lead screw to rotate back and forth through the transmission of the synchronous belt.

[0010] As a preferred embodiment, the fixing sleeve is a steel pipe.

[0011] As a preferred embodiment, the first tool changer drive unit includes a mounting base, a movable frame, a first drive mechanism, a tilting shaft, a moving shaft, and a second drive mechanism. The mounting base is disposed on the slider and located beside the first adjustable tool group, and has a receiving groove. The movable frame is movably disposed on the mounting base laterally. The first drive mechanism is disposed on the mounting base and drives the movable frame to move back and forth. The tilting shaft is rotatably disposed on the movable frame and moves laterally back and forth with the movable frame. The moving shaft is disposed at the outer end of the tilting shaft and moves laterally back and forth with the tilting shaft. The tilting shaft can rotate back and forth relative to the moving shaft. The second drive mechanism is disposed on the movable frame and drives the tilting shaft to rotate back and forth. The aforementioned plurality of first tools are hung on the moving shaft and the tilting shaft and located in the receiving groove. The plurality of first tools are engaged or disengaged from the tilting shaft as the moving shaft and the tilting shaft move. The first tool engaged in the tilting shaft is driven by the tilting shaft to rotate up and down.

[0012] As a preferred embodiment, the first cutting tool is provided with a first limiting part, the flipping shaft is recessed with a first limiting groove that cooperates with the first limiting part, the moving shaft is recessed with a second limiting groove that cooperates with the first limiting part, the first cutting tool is engaged with or disengaged from the flipping shaft through the cooperation of the first limiting part with the first limiting groove and the second limiting groove, and the side wall of the receiving groove is provided with a second limiting part that cooperates with the second limiting groove.

[0013] As a preferred embodiment, there are two second adjusting tool groups, with each second adjusting tool group positioned on one side of the first adjusting tool group; correspondingly, there are two second tool changing drive units, with each second tool changing drive unit driving the corresponding second adjusting tool group to move back and forth.

[0014] As a preferred embodiment, each second tool is provided with two laterally spaced limiting rods, with a limiting groove sandwiched between the two limiting rods; the second tool change drive unit includes a conveyor belt, a third drive mechanism, a transmission seat, a limiting head, and a fourth drive mechanism; the conveyor belt extends laterally and is rotatably mounted on the slider and located above the second adjusting tool group; the third drive mechanism is mounted on the slider and drives the conveyor belt to rotate back and forth; the transmission seat is mounted on the conveyor belt and moves laterally back and forth with the conveyor belt; the limiting head is movably mounted on the transmission seat and moves back and forth with the transmission seat, and the limiting head can move downwards into the limiting groove; the fourth drive mechanism is mounted on the transmission seat and drives the limiting head to move up and down.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0016] It uses two servo motors to drive corresponding lead screws to rotate back and forth. Two nut seats are respectively fitted onto the lower ends of the corresponding lead screws and move up and down with the rotation of the lead screws. Two fixed sleeves are fitted onto the corresponding nut seats and move up and down with the nut seats. The lower ends of the two fixed sleeves are respectively fixed to the left and right sides of the slider, thereby driving the slider to move up and down. This servo motor drive replaces the existing hydraulic drive. The motor drive has a fast response speed and high positional accuracy, thus ensuring the accuracy of sheet metal bending. At the same time, the overall structure is simpler, requiring no additional hydraulic circuit structure, making maintenance and installation convenient, and reducing noise during operation. It also features a first adjustable tool set that can be flipped up and down on the slider, and a second adjustable tool set that can be moved laterally back and forth on the slider and located next to the first adjustable tool set. This allows it to automatically assemble tools of appropriate size according to the specific product dimensions being processed, eliminating the need for manual tool changing. This effectively improves the overall bending efficiency. Attached Figure Description

[0017] Figure 1 is a three-dimensional structural schematic diagram of a preferred embodiment of the present invention;

[0018] Figure 2 is a partial assembly schematic diagram of a preferred embodiment of the present invention;

[0019] Figure 3 is a cross-sectional schematic diagram of a preferred embodiment of the present invention;

[0020] Figure 4 is an enlarged view of point A in Figure 3;

[0021] Figure 5 is a three-dimensional structural diagram of the knife assembly in a preferred embodiment of the present invention;

[0022] Figure 6 is a partial assembly schematic diagram of the knife assembly in a preferred embodiment of the present invention;

[0023] Figure 7 is a schematic diagram of another partial assembly of the blade assembly in a preferred embodiment of the present invention;

[0024] Figure 8 is an enlarged view of point B in Figure 7;

[0025] Figure 9 is a three-dimensional structural diagram of the first cutting tool in a preferred embodiment of the present invention.

[0026] Explanation of reference numerals in the attached diagram:

[0027] 10. Frame 11. Lower Tool Holder

[0028] 12. Slide rail; 20. Controller

[0029] 30. Slider 301. Fixing groove

[0030] 302, First connecting hole; 303, Second connecting hole

[0031] 31. Semicircular block; 40. Lead screw

[0032] 41. Second synchronous pulley; 50. Servo motor

[0033] 51. First synchronizer pulley; 60. Nut seat

[0034] 70. Fixed sleeve; 701. Adapter groove

[0035] 702, Third connecting hole; 703, First fixing hole

[0036] 71. Slide 72. End Cap

[0037] 73. Ball head; 74. First fixing bolt

[0038] 80. Knife assembly; 801. Receiving slot

[0039] 802, First limiting groove; 803, Second limiting groove

[0040] 804, Third limiting groove; 81, First adjusting tool group

[0041] 811. First cutting tool; 812. First limiting part

[0042] 82. First tool changer drive unit; 821. Mounting base

[0043] 822. Movable frame; 823. First drive mechanism

[0044] 824. Flip axis; 825. Moving axis

[0045] 826. Second drive mechanism; 827. Second limit unit

[0046] 83. Second Adjusting Tool Group 831. Second Tool

[0047] 832. Limiting rod

[0048] 84. Second tool changer drive unit; 841. Conveyor belt

[0049] 842. Third drive mechanism; 843. Transmission base

[0050] 844. Limit head; 845. Fourth drive mechanism. The best embodiment of the present invention

[0051] Please refer to Figures 1 to 9, which show the specific structure of a preferred embodiment of the present invention, including a frame 10, a controller 20, a slider 30, two lead screws 40, two servo motors 50, two nut seats 60, two fixing sleeves 70, and a blade assembly 80.

[0052] A lower tool holder 11 is provided on the frame 10; the controller 20 is provided on the frame 10; in this embodiment, two slide rails 12 arranged on the left and right are provided on the frame 10.

[0053] The slider 30 is movably mounted on the frame 10 and located above the lower tool holder 11. In this embodiment, two vertically extending fixing grooves 301 are respectively provided on the left and right sides of the slider 30. The upper end of the fixing groove 301 is semi-circular. Each fixing groove 301 has a semi-circular block 31 at its upper end. A vertically extending first connecting hole 302 passes through the semi-circular block 31. A second connecting hole 303 passes through the upper end face of the slider 30 and the upper inner wall of the fixing groove 301. The second connecting hole 303 and the first connecting hole 302 are vertically aligned.

[0054] The two lead screws 40 are arranged on the left and right and can be rotated back and forth on the frame 10; in this embodiment, a second synchronous pulley 41 is provided at the upper end of the lead screw 40.

[0055] The two servo motors 50 are mounted on the frame 10 and connected to the controller 20 respectively. The two servo motors 50 drive the corresponding lead screws 40 to rotate back and forth, so that the servo motors 50 drive the lead screws 40 to replace the existing hydraulic transmission method. The motor transmission method not only has a faster response speed and thus higher bending accuracy, but also does not require a complex oil circuit structure, making the assembly and maintenance process more convenient. In this embodiment, the output end of the servo motor 50 is connected to a first synchronous pulley 51. The first synchronous pulley 51 and the second synchronous pulley 41 are connected by a synchronous belt (not shown in the figure). The servo motor 50 drives the lead screws 40 to rotate back and forth through the synchronous belt transmission method.

[0056] The two nut seats 60 are respectively fitted onto the lower end of the corresponding lead screw 40 and move up and down as the lead screw 40 rotates.

[0057] The two fixed sleeves 70 are fixed to the corresponding nut seats 60 and move up and down with the nut seats 60. The lower ends of the two fixed sleeves 70 are fixed to the left and right sides of the slider 30, thereby driving the slider 30 to move up and down. In this embodiment, each fixed sleeve 70 is provided with a slide block 71 that cooperates with the slide rail 12. The fixed sleeve 70 moves up and down with the nut seat 60 through the cooperation of the slide block 71 and the slide rail 12. Both fixed sleeves 70 have an end cap 72 at their lower ends. Each end cap 72 has a semi-circular adapter groove 701 integrally recessed into its lower end face. A semi-circular ball head 73 is provided within the adapter groove 701, through which a third connecting hole 702 extends vertically. The third connecting hole 702 is vertically aligned with the second connecting hole 303. A first fixing hole 703 extends upwards through the top surface of the adapter groove 701, directly opposite the third connecting hole 702. A first fixing bolt 74 passes through the first connecting hole 302 and the second connecting hole 303 sequentially from bottom to top. The third connecting hole 702 and the first fixing hole 703 fix the fixing sleeve 70 and the slider 30 together. The diameters of the first connecting hole 302, the second connecting hole 303, and the third connecting hole 702 are all larger than the diameter of the first fixing bolt 74. This allows the slider 30 to move up and down, and it can also be controlled independently by the two servo motors 50. With the cooperation of the semi-circular block 31 and the upper end of the fixing groove 301, and the cooperation of the ball head 73 and the adapter groove 701, the slider 30 can move left and right in linkage or independently, which facilitates the later installation and debugging of the equipment and its use in special working conditions. The fixing sleeve 70 is a steel pipe.

[0058] The blade assembly 80 is mounted on the slider 30 and moves up and down with the slider 30. The blade assembly 80 is located directly above the lower blade holder 11 and is connected to the controller 20. The blade assembly 80 includes a first adjustable blade group 81, a first blade changing drive unit 82, a second adjustable blade group 83, and a second blade changing drive unit 84. The first adjustable blade group 81 is mounted on the slider 30 and can be flipped up and down. The first adjustable blade group 81 includes a plurality of first blades 811 arranged in sequence. The first blade changing drive unit 82 is mounted on the slider 30 and drives the first adjustable blade group 81 to flip up and down. The second adjustable blade group 83 is mounted on the slider 30 and can move back and forth laterally and is located next to the first adjustable blade group 81. The second adjustable blade group 83 includes a plurality of second blades 831 arranged in sequence laterally. The second blade changing drive unit 84 is mounted on the slider 30 and drives the second adjustable blade group 83 to move back and forth laterally.

[0059] In this embodiment, the first tool changer drive unit 82 includes a mounting base 821, a movable frame 822, a first drive mechanism 823, a tilting shaft 824, a moving shaft 825, and a second drive mechanism 826. The mounting base 821 is disposed on the slider 30 and located beside the first adjustable tool group 81, and has a receiving groove 801. The movable frame 822 is movably disposed on the mounting base 821. The first drive mechanism 823 is disposed on the mounting base 821 and drives the movable frame 822 to move back and forth. The tilting shaft 824 is rotatably disposed on the movable frame 822 and moves with the movable frame. The frame 822 moves back and forth laterally; the movable shaft 825 is located at the outer end of the flip shaft 824 and moves back and forth laterally with the flip shaft 824. The flip shaft 824 can flip back and forth relative to the movable shaft 825. The second drive mechanism 826 is located on the movable frame 822 and drives the flip shaft 824 to rotate back and forth. The aforementioned plurality of first tools 811 are hung on the movable shaft 825 and the flip shaft 824 and are located in the receiving groove 801. The plurality of first tools 811 are engaged or disengaged from the flip shaft 824 as the movable shaft 825 and the flip shaft 824 move. The first tool engaged in the flip shaft 824 is driven by the flip shaft 824 to flip up and down. The first cutting tool 811 is provided with a first limiting part 812, the flipping shaft 824 is recessed with a first limiting groove 802 that cooperates with the first limiting part 812, and the moving shaft 825 is recessed with a second limiting groove 803 that cooperates with the first limiting part 812. The first cutting tool 811 is engaged with or disengaged from the flipping shaft 824 through the cooperation of the first limiting part 812, the first limiting groove 802, and the second limiting groove 803. The side wall of the receiving groove 801 is provided with a second limiting part 827 that cooperates with the second limiting groove 803. The second limiting part 827, through its cooperation with the second limiting groove 803, is used to prevent the moving shaft 825 from rotating.

[0060] The second adjusting tool group 83 is configured in pairs, with each pair positioned on either side of the first adjusting tool group 81. Correspondingly, the second tool changing drive unit 84 is configured in pairs, with each second tool changing drive unit 84 driving the corresponding second adjusting tool group 83 to move back and forth. Each second tool 831 is provided with two horizontally spaced limiting rods 832, with a third limiting groove 804 sandwiched between the two limiting rods 832. The second tool changing drive unit 84 includes a conveyor belt 841, a third drive mechanism 842, a transmission seat 843, a limiting head 844, and a fourth drive mechanism 845. The conveyor belt 841 extends laterally and is rotatably mounted on the slider 30, located above the second adjusting tool group 83. The third drive mechanism 842 is mounted on the slider 30 and drives the conveyor belt 841 to rotate back and forth. The transmission seat 843 is mounted on the conveyor belt 841 and moves with the conveyor belt 845. 1. Lateral back-and-forth movement; the limiting head 844 is movably mounted on the transmission seat 843 and moves back and forth with the transmission seat 843. The limiting head 844 can move downwards and extend into the third limiting groove 804. The fourth drive mechanism 845 is mounted on the transmission seat 843 and drives the limiting head 844 to move back and forth. The limiting head 844 extends downwards into the corresponding third limiting groove 804. Then, the third drive mechanism 842 drives the conveyor belt 841 to drive the corresponding number of second cutters 831 toward the first adjusting cutter group 81, thereby cooperating with the first adjusting cutter group 81 to complete the cutter assembly process.

[0061] The key design feature of this invention is that it uses two servo motors to drive corresponding lead screws to rotate back and forth. Two nut seats are respectively fitted onto the lower ends of the corresponding lead screws and move up and down with the rotation of the lead screws. Two fixed sleeves are fitted and fixed onto the corresponding nut seats and move up and down with the nut seats. The lower ends of the two fixed sleeves are respectively fixed to the left and right sides of the slider, thereby driving the slider to move up and down. This allows the servo motor drive to replace the existing hydraulic drive, which has a fast response speed and high positional accuracy, thus ensuring the accuracy of sheet metal bending. At the same time, the overall structure is simpler, requiring no additional hydraulic circuit structure, making maintenance and installation convenient, and reducing noise during operation. Furthermore, the first adjusting tool group can be flipped up and down on the slider, and the second adjusting tool group can be moved laterally back and forth on the slider and located next to the first adjusting tool group. This allows for the automatic splicing of tools of appropriate size according to the specific product dimensions being processed, eliminating the need for manual tool changing. This effectively improves the overall bending efficiency.

[0062] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A bending machine with an automatic blade-aligning structure, characterized in that: The assembly includes a frame, a controller, a slider, two lead screws, two servo motors, two nut seats, two fixing sleeves, and a blade assembly. A lower blade holder is mounted on the frame. The controller is mounted on the frame. The slider is movably mounted on the frame and positioned above the lower blade holder. The two lead screws are arranged horizontally and rotatably on the frame. The two servo motors are mounted on the frame and connected to the controller, driving the corresponding lead screws to rotate. The two nut seats are respectively fitted onto the lower ends of the corresponding lead screws and move up and down with the rotation of the lead screws. The two fixing sleeves are fitted onto the corresponding nut seats and move up and down with the nut seats, with the lower ends of the two fixing sleeves fixed to the left and right sides of the slider, thereby driving the slider to move up and down. The blade assembly... The assembly is mounted on the slider and moves up and down with the slider. The blade assembly is located directly above the lower blade holder and is connected to the controller. The blade assembly includes a first adjustable blade group, a first blade changing drive unit, a second adjustable blade group, and a second blade changing drive unit. The first adjustable blade group is mounted on the slider and can be flipped up and down. The first adjustable blade group includes multiple first blades arranged in sequence. The first blade changing drive unit is mounted on the slider and drives the first adjustable blade group to flip up and down. The second adjustable blade group is mounted on the slider and can move back and forth laterally and is located next to the first adjustable blade group. The second adjustable blade group includes multiple second blades arranged in sequence laterally. The second blade changing drive unit is mounted on the slider and drives the second adjustable blade group to move back and forth laterally.

2. The bending machine with an automatic blade-jointing structure according to claim 1, characterized in that: The frame is equipped with two slide rails arranged on the left and right. Each fixed sleeve is equipped with a slide block that mates with the slide rail. The fixed sleeve moves up and down through the mating of the slide block and the slide rail, driven by the nut seat.

3. The bending machine with an automatic blade-jointing structure according to claim 1, characterized in that: The slider has two vertically extending fixing grooves on its left and right sides, respectively. The upper end of each fixing groove is semi-circular, and each fixing groove has a semi-circular block at its upper end. A first connecting hole extending vertically is passed through the semi-circular block. A second connecting hole passes through the upper end face of the slider and the upper inner wall of the fixing groove. The second connecting hole and the first connecting hole are vertically aligned. The lower end of each fixing sleeve is provided with an end cap. The lower end face of each end cap is integrally recessed with a semi-circular adapter groove. A semi-circular ball head is provided in the adapter groove. A third connecting hole extending vertically is passed through the ball head. The third connecting hole and the second connecting hole are vertically aligned. The upper bottom surface of the adapter groove has a first fixing hole extending upwards. The first fixing hole and the third connecting hole are vertically aligned. A first fixing bolt passes through the first connecting hole, the second connecting hole, the third connecting hole and the first fixing hole from bottom to top to fix the fixing sleeve and the slider together. The diameters of the first connecting hole, the second connecting hole and the third connecting hole are all larger than the diameter of the first fixing bolt.

4. The bending machine with an automatic blade-jointing structure according to claim 1, characterized in that: The output end of the servo motor is connected to a first synchronous pulley, and a second synchronous pulley is provided at the upper end of the lead screw. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt. The servo motor drives the lead screw to rotate back and forth through the transmission of the synchronous belt.

5. The bending machine with an automatic blade-jointing structure according to claim 1, characterized in that: The fixing sleeve is a steel pipe.

6. The bending machine with an automatic blade-aligning structure according to claim 1, characterized in that: The first tool changer drive unit includes a mounting base, a movable frame, a first drive mechanism, a tilting shaft, a moving shaft, and a second drive mechanism. The mounting base is mounted on the slider and located beside the first adjustable tool group, and has a receiving groove. The movable frame is movably mounted on the mounting base laterally. The first drive mechanism is mounted on the mounting base and drives the movable frame to move back and forth. The tilting shaft is rotatably mounted on the movable frame and moves laterally back and forth with the movable frame. The moving shaft is located at the outer end of the tilting shaft and moves laterally back and forth with the tilting shaft. The tilting shaft can rotate back and forth relative to the moving shaft. The second drive mechanism is mounted on the movable frame and drives the tilting shaft to rotate back and forth. The aforementioned plurality of first tools are hung on the moving shaft and the tilting shaft and located in the receiving groove. The plurality of first tools are engaged or disengaged from the tilting shaft as the moving shaft and the tilting shaft move. The first tool engaged in the tilting shaft is driven by the tilting shaft to rotate up and down.

7. The bending machine with an automatic blade-aligning structure according to claim 6, characterized in that: The first cutting tool is provided with a first limiting part, the flipping shaft is recessed with a first limiting groove that cooperates with the first limiting part, the moving shaft is recessed with a second limiting groove that cooperates with the first limiting part, the first cutting tool is engaged with or disengaged from the flipping shaft through the cooperation of the first limiting part, the first limiting groove and the second limiting groove, and the receiving groove sidewall is provided with a second limiting part that cooperates with the second limiting groove.

8. The bending machine with an automatic blade-aligning structure according to claim 1, characterized in that: There are two second adjusting tool groups, which are respectively arranged on both sides of the first adjusting tool group; correspondingly, there are two second tool changing drive units, each of which drives the corresponding second adjusting tool group to move back and forth.

9. The bending machine with an automatic blade-jointing structure according to claim 1, characterized in that: Each second tool is provided with two horizontally spaced limiting rods, with a limiting groove sandwiched between the two limiting rods; the second tool change drive unit includes a conveyor belt, a third drive mechanism, a transmission seat, a limiting head, and a fourth drive mechanism; the conveyor belt extends laterally and is rotatably mounted on the slider and located above the second adjusting tool group; the third drive mechanism is mounted on the slider and drives the conveyor belt to rotate back and forth; the transmission seat is mounted on the conveyor belt and moves laterally back and forth with the conveyor belt; the limiting head is movably mounted on the transmission seat and moves back and forth with the transmission seat, and the limiting head can move downwards into the limiting groove; the fourth drive mechanism is mounted on the transmission seat and drives the limiting head to move up and down back and forth.

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