Bending center having automatic tool change function

Abstract

A bending center having an automatic tool change function. The bending center is provided with an automatic tool change device (a), a tool bit holder (50), a first tool bit holder driving unit (60) and a second tool bit holder driving unit (70); the automatic tool change device (a) is arranged on a tool pressing frame (30) and vertically reciprocates directly above a support plate (11) along with the tool pressing frame (30); moreover, the first tool bit holder driving unit (60) is arranged on a machine frame and drives the tool bit holder (50) to reciprocate in a front-rear direction, and the second tool bit holder driving unit (70) is arranged on the machine frame (10) and drives the tool bit holder (50) to simultaneously reciprocate vertically and in the front-rear direction. The cooperation between the first tool bit holder driving unit (60) and the second tool bit holder driving unit (70) enables the tool bit holder (50) to have a greater amount of different movement ranges, makes a product have more bent angles, and causes the bending center to have fewer limitations in use, thereby satisfying the requirement for processing products of different sizes without providing more pressing tools, and usage costs are thus reduced.

Description

Bending center with automatic tool changing function TECHNICAL FIELD

[0001] The present application relates to the field of bending center technology, in particular to a bending center with automatic tool changing function. BACKGROUND

[0002] The bending machine is a kind of machine that can bend sheet, its structure mainly includes frame, hydraulic system, electrical system, slider mechanism, synchronous mechanism, upper and lower die mechanism, rear material blocking, front material supporting frame and other parts. Among them, the upper and lower die mechanism includes upper pressing knife assembly and lower bending die, according to different bending requirements, customize corresponding upper and lower bending die. Among them, the bending center is also a kind of bending machine.

[0003] The existing bending center needs to replace the pressing knife of different sizes to press the product during processing, so different sizes of pressing knives need to be prepared, which leads to high cost of using pressing knives, and the existing bending center tool seat can only be horizontally or vertically movable to bend, so that the bending center can bend the product at a small angle, and more different angles cannot be bent during the bending process, so the use is limited. Therefore, it is necessary to study a new technical scheme to solve the above problems. TECHNICAL SOLUTION

[0004] Therefore, the present application aims at the defects of the prior art, and its main purpose is to provide a bending center with automatic tool changing function, which can effectively solve the problems of high cost of using pressing knife of existing bending center, insufficient bending angle flexibility and large use limitation.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] The application discloses a bending center with automatic tool changing function, which comprises a rack, a controller, a pressing tool holder, a pressing tool driving unit, an automatic tool changing device, a tool head seat, a first tool head seat driving unit and a second tool head seat driving unit; the rack is provided with a support plate extending transversely; the controller is arranged on the rack; the pressing tool holder is arranged on the rack and located right above the support plate and can move up and down; the pressing tool driving unit is arranged on the rack and drives the pressing tool holder to move up and down; the automatic tool changing device is arranged on the pressing tool holder and moves up and down with the pressing tool holder and is located right above the support plate, the automatic tool changing device is connected with the controller, and the automatic tool changing device comprises a mounting frame, a middle structure, a first tool adjusting assembly and a second tool adjusting assembly; the mounting frame is arranged on the pressing tool holder; the middle structure is arranged on the mounting frame and comprises a middle frame, a middle tool and a middle driving mechanism; the middle frame is arranged on the mounting frame; the middle tool is arranged on the middle frame and can move up and down; the middle driving mechanism is arranged on the pressing tool holder and drives the middle tool to move up and down; the first tool adjusting assembly is arranged on the pressing tool holder and located beside the middle structure, and the first tool adjusting assembly comprises a mounting plate, a plurality of first tools and a first adjusting driving unit; the mounting plate is arranged on the pressing tool holder, the first tools are arranged transversely on the mounting plate and can move up and down and flip; the first adjusting driving unit is arranged on the mounting plate and drives the first tools to move up and down and flip; the second tool adjusting assembly is arranged on the mounting frame; the second tool adjusting assembly comprises a second tool and a second adjusting driving unit; the second tool is arranged transversely on the mounting frame and can move transversely and is arranged close to the middle structure; the second adjusting driving unit is arranged on the mounting frame and drives the second tool to move transversely.

[0007] As a preferred scheme, the rear end of the pressing tool holder is hinged to the rack; the pressing tool driving unit comprises a first motor, a first speed reducer, a first eccentric shaft, a fixed shaft and a first connecting rod; the first motor is arranged on the pressing tool holder and connected with the controller; the first speed reducer is arranged on the pressing tool holder and connected with the output end of the first motor; the first eccentric shaft is arranged on the output end of the first speed reducer and rotates back and forth driven by the first speed reducer; the fixed shaft is arranged on the rack and located below the pressing tool holder; the upper end of the first connecting rod is arranged on the first eccentric shaft and moves back and forth with the first eccentric shaft, and the lower end of the first connecting rod is sleeved on the fixed shaft and rotationally connected with the fixed shaft.

[0008] As a preferred embodiment, there are two first tool adjustment components, which are symmetrically arranged on the left and right sides of the central structure; there are also two second tool adjustment components, which are respectively arranged on the outside of the two first tool adjustment components.

[0009] As a preferred embodiment, the central frame has a vertically extending movable groove, in which the central cutter can be movably arranged. The upper end of the central cutter is integrally recessed inward with a clearance groove. The central frame is provided with limiting components and limiting drive mechanisms. There are two limiting components, which are arranged symmetrically laterally and can be movably arranged laterally back and forth in the movable groove. The limiting components move back and forth directly above the clearance groove. There are also two limiting drive mechanisms, both of which are arranged on the central frame and drive the corresponding limiting components to move.

[0010] As a preferred embodiment, the first adjustment drive unit includes a movable seat, a first drive mechanism, a rotating shaft, a second drive mechanism, and an adjustment shaft. The movable seat is movably mounted on the mounting plate laterally back and forth. The first drive mechanism is mounted on the mounting plate and drives the movable seat to move laterally back and forth. The rotating shaft is rotatably mounted on the mounting plate and located beside the movable seat. The lower end of the movable seat is sleeved on the rotating shaft and slidably connected to it. The second drive mechanism is mounted on the mounting plate and drives the rotating shaft to rotate back and forth. One end of the adjustment shaft is mounted on the rotating shaft via a connecting rod, and one end of the connecting rod slides... The first tool is mounted on a rotating shaft and moved laterally back and forth along the rotating shaft by a movable seat. The other end of the connecting rod is fixedly connected to the adjusting shaft. The adjusting shaft is also connected to the rotating shaft through a fixed rod. One end of the fixed rod is fixedly connected to the rotating shaft and is rotated back and forth by the rotating shaft. The other end of the adjusting shaft and the fixed rod are slidably connected laterally and rotated up and down by the fixed rod. The aforementioned multiple first tools are all sleeved on the rotating shaft and rotated up and down by the adjusting shaft. Each first tool has an adjusting hole that cooperates with the adjusting shaft. The adjusting shaft is inserted into the adjusting hole of the corresponding first tool to rotate the corresponding first tool.

[0011] As a preferred embodiment, each second cutter is provided with a limit rod and an adjusting cylinder at its upper end. The limit rod is movably mounted on the second cutter, and the adjusting cylinder is mounted on the second cutter and drives the limit rod to move up and down. The second adjusting drive unit includes a movable rod and a fourth drive mechanism. The movable rod is movably mounted on the mounting frame, and the lower end face of the movable rod is integrally recessed with multiple horizontally spaced limiting grooves. The limit rod on each second cutter corresponds vertically to the corresponding limiting groove, and the limit rod moves upward and extends into the limiting groove. The fourth drive mechanism is mounted on the mounting frame and drives the movable rod to move horizontally back and forth.

[0012] As a preferred embodiment, the first tool adjustment assembly further includes a fixing plate and a third drive mechanism. The fixing plate is mounted on the mounting plate and is located directly above the first tool. The lower end of the fixing plate is provided with a buckle that cooperates with the first tool. The third drive mechanism is mounted on the mounting plate and drives the fixing plate to rotate up and down.

[0013] As a preferred embodiment, the system also includes two feeding devices arranged symmetrically on the left and right sides. Both feeding devices are mounted on the frame and located in front of the support plate. Each feeding device includes a feeding frame, a movable plate, a first feeding drive mechanism, a feeding rod, and a second feeding drive mechanism. The feeding frame is mounted on the frame and located below the front side of the support plate. The movable plate is movably mounted on the feeding frame. The first feeding drive mechanism is mounted on the feeding frame and drives the movable plate to move back and forth laterally. The feeding rod is movably mounted on the movable plate and moves back and forth laterally with the movable plate. The feeding rod extends upwards beyond the upper surface of the support plate. The second feeding drive mechanism is mounted on the movable plate and drives the feeding rod to move back and forth.

[0014] As a preferred embodiment, the first cutter head holder drive unit includes a movable seat, a second motor, a second reducer, and a drive shaft; the movable seat is movably mounted on the frame and located behind the cutter head holder, with the rear end of the cutter head holder hinged to the movable seat; the second motor is mounted on the frame; the second reducer is connected to the output end of the second motor; one end of the drive shaft is connected to the output end of the second reducer and is driven to rotate back and forth by the second reducer, while the other end of the drive shaft engages with the movable seat and drives the movable seat to move back and forth.

[0015] As a preferred embodiment, the second cutter head holder drive unit includes a third motor, a third reducer, a second eccentric shaft, and a second connecting rod; the third motor is mounted on the frame; the third reducer is mounted on the frame and connected to the output end of the third motor; the second eccentric shaft is located at the output end of the third reducer and is driven by the third reducer to rotate back and forth; one end of the second connecting rod is connected to the second eccentric shaft and is driven by the second eccentric shaft to move back and forth; the other end of the second connecting rod is hinged to the lower end of the cutter head holder, thereby driving the cutter head holder to move back and forth.

[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0017] It is equipped with an automatic tool changer, a tool head holder, a first tool head holder drive unit, and a second tool head holder drive unit. The automatic tool changer is mounted on the tool holder and moves back and forth above the support plate as the tool holder moves up and down. This allows different tools to be changed according to the actual size of the product being processed, thus meeting the processing needs of different sizes. It also eliminates the need for additional tool holders, reducing the cost of using additional tool holders. Meanwhile, the first tool head holder drive unit is mounted on the frame and drives the tool head holder to move back and forth. The second tool head holder drive unit is mounted on the frame and drives the tool head holder to move up and down and back and forth simultaneously. The cooperation between the first and second tool head holder drive units allows the tool head holder to have a wider range of motion, enabling it to bend products at more angles, meet more processing needs, and reduce its limitations. Attached Figure Description

[0018] Figure 1 is a three-dimensional structural schematic diagram of a preferred embodiment of the present invention;

[0019] Figure 2 is a partial assembly schematic diagram of a preferred embodiment of the present invention;

[0020] Figure 3 is a three-dimensional structural schematic diagram of the automatic tool changer in a preferred embodiment of the present invention;

[0021] Figure 4 is a three-dimensional structural schematic diagram of the first tool adjustment component in the automatic tool changer according to a preferred embodiment of the present invention;

[0022] Figure 5 is a three-dimensional structural schematic diagram of the first tool adjustment component in the automatic tool changer according to a preferred embodiment of the present invention from another angle.

[0023] Figure 6 is a three-dimensional structural diagram of the centrally located structure in the automatic tool changer according to a preferred embodiment of the present invention;

[0024] Figure 7 is a partial assembly schematic diagram of the second tool adjustment component in the automatic tool changer according to a preferred embodiment of the present invention;

[0025] Figure 8 is an enlarged view of point A in Figure 7;

[0026] Figure 9 is a three-dimensional structural schematic diagram of the second tool in the automatic tool changer according to a preferred embodiment of the present invention;

[0027] Figure 10 is a three-dimensional structural schematic diagram of the feeding device in a preferred embodiment of the present invention;

[0028] Figure 11 is a partial assembly schematic diagram of a preferred embodiment of the present invention;

[0029] Figure 12 is a partial assembly schematic diagram of a preferred embodiment of the present invention.

[0030] Explanation of reference numerals in the attached diagram:

[0031] 10. Frame 11. Support plate

[0032] 20. Controller; 30. Tool holder

[0033] 40. Pressure knife drive unit; 41. First motor

[0034] 42. First reducer 43. First eccentric shaft

[0035] 44. Fixed shaft 45. First connecting rod

[0036] a. Automatic tool changer

[0037] 10a, mounting bracket 20a, centrally located structure

[0038] 201a, movable slot 202a, clearance slot

[0039] 21a, Central frame; 22a, Central cutting tool.

[0040] 23a. Central drive mechanism; 24a. Limiting component

[0041] 25a, Limit drive mechanism; 30a, First tool adjustment assembly

[0042] 301a, Adjustment hole 31a, Mounting plate

[0043] 32a, First cutting tool; 33a, First adjustment drive unit

[0044] 331a, movable seat 332a, first drive mechanism

[0045] 333a, rotating shaft 334a, second drive mechanism

[0046] 335a, adjusting shaft 336a, connecting rod

[0047] 337a, fixing rod 34a, fixing plate

[0048] 341a, buckle 35a, third drive mechanism

[0049] 36a. Fifth drive mechanism

[0050] 40a, Second tool adjustment assembly 401a, Limiting groove

[0051] 41a, Second cutting tool 411a, Limiting rod

[0052] 412a, Adjusting cylinder 42a, Second adjusting drive unit

[0053] 421a, movable lever 422a, fourth drive mechanism

[0054] 50. Cutter head holder; 60. First cutter head holder drive unit

[0055] 61. Movable seat; 62. Second motor

[0056] 63. Second reducer 64. Drive shaft

[0057] 70. Second cutter head holder drive unit; 71. Third motor

[0058] 72. Third reducer; 73. Second eccentric shaft

[0059] 74. Second connecting rod; 80. Material feeding device

[0060] 81. Material feeding rack 82. Movable plate

[0061] 83. First feeding drive mechanism 84. Feeding rod

[0062] 85. Second feeding drive mechanism. The best embodiment of the present invention

[0063] Please refer to Figures 1 to 12, which show the specific structure of a preferred embodiment of the present invention, including a frame 10, a controller 20, a tool holder 30, a tool holder drive unit 40, an automatic tool changer a, a tool head holder 50, a first tool head holder drive unit 60, and a second tool head holder drive unit 70.

[0064] A laterally extending support plate 11 is provided on the frame 10; the controller 20 is provided on the frame 10.

[0065] The pressure holder 30 is movable up and down on the frame 10 and located directly above the support plate 11; in this embodiment, the rear end of the pressure holder 30 is hinged to the frame 10.

[0066] The pressing drive unit 40 is mounted on the frame 10 and drives the pressing holder 30 to move up and down. In this embodiment, the pressing drive unit 40 includes a first motor 41, a first reducer 42, a first eccentric shaft 43, a fixed shaft 44, and a first connecting rod 45. The first motor 41 is mounted on the pressing holder 30 and connected to the controller 20. The first reducer 42 is mounted on the pressing holder 30 and connected to the output end of the first motor 41. The first eccentric shaft 43 is mounted on the output end of the first reducer 42 and is driven by the first reducer 42 to rotate back and forth. The fixed shaft 44 is mounted on the frame 10 and located below the pressing holder 30. The upper end of the first connecting rod 45 is mounted on the first eccentric shaft 43 and rotates back and forth with the first motor 41. An eccentric shaft 43 moves back and forth. The lower end of the first connecting rod 45 is sleeved on the fixed shaft 44 and rotatably connected to the fixed shaft 44. When the first reducer 42 drives the first eccentric shaft 43 to rotate, the first eccentric shaft 43 drives the upper end of the first connecting rod 45 to move. Since the lower end of the first connecting rod 45 is fixed in the vertical direction through the fixed shaft 44, it drives the pressure holder 30 to move back and forth. It is driven by the first eccentric shaft 43 on the pressure holder 30 to rotate through the first reducer 42, so that the pressure holder 30 rotates around the fulcrum. When pressing the plate, the eccentric shaft reaches the vicinity of the top dead center, and the clamping force tends to be infinitely large, thereby ensuring that plates of different thicknesses and lengths can be clamped and preventing the plates from shifting.

[0067] The automatic tool changer a is mounted on the tool holder 30 and moves back and forth above the support plate 11 as the tool holder 30 moves up and down. The automatic tool changer a is connected to the controller 20. The automatic tool changer a includes a mounting bracket 10a, a central structure 20a, a first tool adjustment assembly 30a, and a second tool adjustment assembly 40a.

[0068] The mounting bracket 10a is mounted on the pressure holder 30.

[0069] The central structure 20a is mounted on the mounting frame 10a. The central structure 20a includes a central frame 21a, a central cutter 22a, and a central drive mechanism 23a. The central frame 21a is mounted on the mounting frame 10a. The central cutter 22a is movably mounted on the central frame 21a. The central drive mechanism 23a is mounted on the pressure holder 30 and drives the central cutter 22a to move up and down. After the bending process is completed, the central drive mechanism 23a drives the central cutter 22a to move upward, so that the spliced ​​cutter has lateral movement space, which facilitates the removal of the bent product. In this embodiment, the central frame 21a has a vertically extending movable groove 201a. The central cutter 22a is movably disposed in the movable groove 201a. The upper end of the central cutter 22a is integrally recessed with a relief groove 202a. The central frame 21a is provided with a limiting member 24a and a limiting drive mechanism 25a. Two limiting members 24a are provided, arranged symmetrically laterally and respectively movably disposed in the movable groove 201a. The limiting members 24a move back and forth directly above the relief groove 202a. The limiting drive mechanism... The structure 25a has two settings, with two limit drive mechanisms 25a both set on the central frame 21a and driving the corresponding limit member 24a to move. When the cutting is combined, the limit drive mechanism 25a drives the limit member 24a to move outward, so that the limit member abuts against the upper end face of the central cutter 22a, thereby limiting the vertical direction of the central cutter 22a. When the processing is completed, the limit drive mechanism 25a drives the limit member 24a to move into the relief groove 202a, and the central drive mechanism 23a drives the central cutter 22a to move upward, thereby facilitating the removal process after the product is bent.

[0070] The first tool adjustment assembly 30a is disposed on the tool holder 30 and located beside the central structure 20a. The first tool adjustment assembly 30a includes a mounting plate 31a, a first tool 32a, and a first adjustment drive unit 33a. The mounting plate 31a is disposed on the tool holder 30. Multiple first tools 32a are arranged horizontally and can be rotated up and down on the mounting plate 31a. The first adjustment drive unit 33a is disposed on the mounting plate 31a and drives the first tools 32a to rotate up and down. In this embodiment... The first tool adjustment assembly 30a consists of two components, symmetrically arranged on the left and right sides of the central structure 20a. In this embodiment, the first adjustment drive unit 33a includes a movable seat 331a, a first drive mechanism 332a, a rotating shaft 333a, a second drive mechanism 334a, and an adjustment shaft 335a. The movable seat 331a is movably mounted on the mounting plate 31a, and the first drive mechanism 332a is mounted on the mounting plate 31a and drives the movable seat 331a to move laterally back and forth. The rotating shaft 334a... 3a is rotatably mounted on mounting plate 31a and located beside movable seat 331a. The lower end of the movable seat 331a is sleeved on rotating shaft 333a and slidably connected to rotating shaft 333a. The second drive mechanism 334a is mounted on mounting plate 31a and drives rotating shaft 333a to rotate back and forth. One end of the adjusting shaft 335a is mounted on rotating shaft 333a via connecting rod 336a. One end of connecting rod 336a is slidably mounted on rotating shaft 333a and driven by movable seat 331a to move laterally along rotating shaft 333a. The connecting rod 336a moves back and forth, with the other end fixedly connected to the adjusting shaft 335a. The adjusting shaft 335a is also connected to the rotating shaft 333a via a fixed rod 337a. One end of the fixed rod 337a is fixedly connected to the rotating shaft 333a and is driven to rotate back and forth by the rotating shaft 333a. The other end of the adjusting shaft 335a and the fixed rod 337a are laterally slidably connected and are driven to rotate up and down by the fixed rod 337a. The aforementioned multiple first cutters 32a are all sleeved on the rotating shaft 333a and are driven to rotate up and down by the adjusting shaft 335a. Each first cutter 32a has an adjusting hole 301a that mates with the adjusting shaft. The adjusting shaft 335a is inserted into the adjusting hole 301a of the corresponding first cutter 32a, causing the corresponding first cutter 32a to rotate. The first tool adjustment assembly 30a also includes a fixing plate 34a and a third drive mechanism 35a. The fixing plate 34a is mounted on the mounting plate 31a and is located directly above the first tool 32a. The lower end of the fixing plate 34a is provided with a buckle 341a that cooperates with the first tool 32a. The third drive mechanism 35a is mounted on the mounting plate 31a and drives the fixing plate 34a to rotate up and down, thereby fixing the position of the upwardly rotated first tool 32a.The mounting plate 31a is mounted on the pressure holder 30 and can move back and forth laterally, driven by a fifth drive mechanism 36a.

[0071] The second tool adjustment assembly 40a is mounted on the mounting frame 10a. The second tool adjustment assembly 40a includes a second tool 41a and a second adjustment drive unit 42a. Multiple second tools 41a are arranged laterally, and these tools can be moved laterally back and forth on the mounting frame 10a, pressing the first tool 32a against the central structure 20a. This allows a specific number of first tools 32a and second tools 41a to be joined together, and then joined with the central tool 22a, thus satisfying the bending processing requirements of products of different sizes. The second adjustment drive unit 42a is mounted on the mounting frame 10a and drives the second tools 41a to move laterally back and forth. In this embodiment, two second tool adjustment assemblies 40a are also provided, each located outside the two first tool adjustment assemblies 30a. The arrangement of two first tool adjustment assemblies 30a and two second tool adjustment assemblies 40a allows for the assembly of tools of more sizes, thus adapting to the bending processing of products of more different sizes. In this embodiment, each second cutter 41a is provided with a limit rod 411a and an adjusting cylinder 412a at its upper end. The limit rod 411a is movably mounted on the second cutter 41a, and the adjusting cylinder 412a is mounted on the second cutter 41a and drives the limit rod 411a to move up and down. The second adjusting drive unit 42a includes a movable rod 421a and a fourth drive mechanism 422a. The movable rod 421a is movably mounted on the mounting bracket 10a laterally. The lower end face of the movable rod 421a is integrally recessed inward with a plurality of laterally spaced limiting grooves 401a. The aforementioned limit rod 411a on each second cutter 41a and the limit rod 411a are connected to the limit rod 411a and the limit rod 412a are connected to the limit rod 411a. The corresponding limiting grooves 401a are positioned vertically, and the aforementioned limiting rod 411a moves upward and extends into the limiting groove 401a. The fourth driving mechanism 422a is mounted on the mounting bracket 10a and drives the movable rod 421a to move back and forth laterally. When a certain number of second cutters 41a are needed, the adjusting cylinder 412a in the corresponding second cutter 41a drives the corresponding limiting rod 411a to move upward and extend into the corresponding limiting groove 401a. The fourth driving mechanism 422a then drives the corresponding number of second cutters 41a to move. The width of the first cutter 32a is one-tenth the width of the second cutter 41a, which makes the dimensional accuracy of the cutter splicing higher.

[0072] The cutter head holder 50 is movably mounted on the frame 10 and located on the rear side of the support plate 11 and the automatic tool changer a.

[0073] The first cutter head holder drive unit 60 is mounted on the frame 10 and drives the cutter head holder to move back and forth. The first cutter head holder drive unit 60 is connected to the controller 20. In this embodiment, the first cutter head holder drive unit 60 includes a movable seat 61, a second motor 62, a second reducer 63, and a transmission shaft 64. The movable seat 61 is movably mounted on the frame 10 and located behind the cutter head holder 50. The rear end of the cutter head holder 50 is hinged to the movable seat 61. The second motor 62 is mounted on the frame 10. The second reducer 63 is connected to the output end of the second motor 62. One end of the transmission shaft 64 is connected to the output end of the second reducer 63 and is driven to rotate back and forth by the second reducer 63. The other end of the transmission shaft 64 cooperates with the movable seat 61 and drives the movable seat 61 to move back and forth.

[0074] The second cutter head holder drive unit 70 is mounted on the frame and drives the cutter head holder to move up and down and back and forth simultaneously. The second cutter head holder drive unit is connected to the controller. In this embodiment, the second cutter head holder drive unit 70 includes a third motor 71, a third reducer 72, a second eccentric shaft 73, and a second connecting rod 74. The third motor 71 is mounted on the frame 10. The third reducer 72 is mounted on the frame 10 and connected to the output end of the third motor 71. The second eccentric shaft 73 is located at the output end of the third reducer 72 and is driven to rotate back and forth by the third reducer 73. One end of the second connecting rod 74 is connected to the second eccentric shaft 73 and is driven to move back and forth by the second eccentric shaft 73. The other end of the second connecting rod 74 is hinged to the lower end of the cutter head holder 50, thereby driving the cutter head holder 50 to move back and forth. This replaces the existing ball screw drive method, which not only eliminates the need for a large motor power, but also reduces the overall height and width of the machine and the floor space required.

[0075] Furthermore, it also includes two feeding devices 80, which are arranged symmetrically on the left and right sides. Both feeding devices 80 are mounted on the frame 10 and located in front of the support plate 11. Each feeding device 80 includes a feeding frame 81, a movable plate 82, a first feeding drive mechanism 83, a feeding rod 84, and a second feeding drive mechanism 85. The feeding frame 81 is mounted on the frame 10 and located below the front side of the support plate 11. The movable plate 82 is mounted on the feeding frame 81 and can move back and forth laterally. The first feeding drive mechanism 83 is mounted on the feeding frame 81 and drives the movable plate 82 to move back and forth laterally. The feeding rod 84 is mounted on the movable plate 82 and moves back and forth laterally with the movable plate 82. The feeding rod 84 extends upwards out of the upper surface of the support plate 11. The second feeding drive mechanism 85 is mounted on the movable plate 82 and drives the feeding rod 84 to move back and forth. Two feeding devices 80 are used to feed the product to be bent to the center position, thereby facilitating the subsequent bending process.

[0076] The key design feature of this invention is that it incorporates an automatic tool changer, a tool head holder, a first tool head holder drive unit, and a second tool head holder drive unit. The automatic tool changer is mounted on a tool holder and moves back and forth above a support plate as the tool holder moves up and down. This allows for the replacement of different tools according to the actual dimensions of the product being processed, thus satisfying processing needs for different sizes. It also eliminates the need for additional tool holders, reducing their operating costs. Simultaneously, the first tool head holder drive unit is mounted on the frame and drives the tool head holder to move back and forth. The second tool head holder drive unit is mounted on the frame and drives the tool head holder to move up and down and back and forth simultaneously. The cooperation between the first and second tool head holder drive units allows the tool head holder to have a wider range of motion, enabling it to bend products at more angles, meeting more processing requirements, and reducing limitations in its application.

[0077] 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 center with automatic tool changing function, characterized in that: The system includes a frame, a controller, a tool holder, a tool holder drive unit, an automatic tool changer, a tool head holder, a first tool head holder drive unit, and a second tool head holder drive unit. A laterally extending support plate is mounted on the frame. The controller is mounted on the frame. The tool holder is movably mounted on the frame and positioned directly above the support plate. The tool holder drive unit is mounted on the frame and drives the tool holder to move up and down. The automatic tool changer is mounted on the tool holder and moves up and down with the tool holder, positioned directly above the support plate. The automatic tool changer and controller... The automatic tool changer includes a mounting frame, a central structure, a first tool adjustment assembly, and a second tool adjustment assembly. The mounting frame is mounted on a tool holder. The central structure is mounted on the mounting frame and includes a central support frame, a central tool, and a central drive mechanism. The central support frame is mounted on the mounting frame. The central tool is movably mounted on the central support frame. The central drive mechanism is mounted on the tool holder and drives the central tool to move up and down. The first tool adjustment assembly is mounted on the tool holder and located beside the central structure. A tool adjustment assembly includes a mounting plate, a first tool, and a first adjustment drive unit. The mounting plate is mounted on a tool holder. Multiple first tools are arranged horizontally and can be rotated up and down on the mounting plate. The first adjustment drive unit is mounted on the mounting plate and drives the first tools to rotate up and down. A second tool adjustment assembly is mounted on a mounting frame. The second tool adjustment assembly includes a second tool and a second adjustment drive unit. Multiple second tools are arranged horizontally and can be moved back and forth horizontally on the mounting frame, pressing the first tools against the central structure. The second adjustment drive unit is mounted on the mounting frame and drives the second tools to move back and forth horizontally. A tool head holder is movably mounted on the frame and located behind the support plate and the automatic tool changer. The first tool head holder drive unit is mounted on the frame and drives the tool head holder to move back and forth, and is connected to a controller. The second tool head holder drive unit is mounted on the frame and drives the tool head holder to move up and down and back and forth simultaneously, and is connected to a controller.

2. The bending center with automatic tool changing function according to claim 1, characterized in that: The rear end of the pressure holder is hinged to the frame; the pressure drive unit includes a first motor, a first reducer, a first eccentric shaft, a fixed shaft, and a first connecting rod; the first motor is mounted on the pressure holder and connected to the controller; the first reducer is mounted on the pressure holder and connected to the output end of the first motor; the first eccentric shaft is mounted on the output end of the first reducer and is driven to rotate back and forth by the first reducer; the fixed shaft is mounted on the frame and located below the pressure holder; the upper end of the first connecting rod is mounted on the first eccentric shaft and moves back and forth with the first eccentric shaft, and the lower end of the first connecting rod is sleeved on the fixed shaft and rotatably connected to the fixed shaft.

3. The bending center with automatic tool changing function according to claim 1, characterized in that: The first tool adjustment assembly consists of two components, which are symmetrically arranged on the left and right sides of the central structure; the second tool adjustment assembly also consists of two components, which are respectively arranged outside the two first tool adjustment assemblies.

4. The bending center with automatic tool changing function according to claim 1, characterized in that: The central frame has a vertically extending movable groove, in which the centrally mounted cutter can be movably mounted. The upper end of the centrally mounted cutter is integrally recessed inward with a clearance groove. The central frame is provided with limiting components and limiting drive mechanisms. There are two limiting components, which are arranged symmetrically laterally and can be movably mounted laterally in the movable groove. The limiting components move back and forth directly above the clearance groove. There are also two limiting drive mechanisms, both of which are mounted on the central frame and drive the corresponding limiting components to move.

5. The bending center with automatic tool changing function according to claim 1, characterized in that: The first adjustment drive unit includes a movable seat, a first drive mechanism, a rotating shaft, a second drive mechanism, and an adjustment shaft. The movable seat is movably mounted on the mounting plate laterally back and forth. The first drive mechanism is mounted on the mounting plate and drives the movable seat to move laterally back and forth. The rotating shaft is rotatably mounted on the mounting plate and located beside the movable seat. The lower end of the movable seat is sleeved on the rotating shaft and slidably connected to it. The second drive mechanism is mounted on the mounting plate and drives the rotating shaft to rotate back and forth. One end of the adjustment shaft is mounted on the rotating shaft via a connecting rod, and the other end of the connecting rod is slidably mounted on the rotating shaft. The rotating shaft is driven by a movable seat to move laterally back and forth along the rotating shaft, and the other end of the connecting rod is fixedly connected to the adjusting shaft; the adjusting shaft is also connected to the rotating shaft through a fixed rod, one end of the fixed rod is fixedly connected to the rotating shaft and is driven by the rotating shaft to rotate back and forth, and the other end of the adjusting shaft and the fixed rod are laterally slidably connected and are driven by the fixed rod to rotate up and down back and forth; the aforementioned multiple first cutters are all sleeved on the rotating shaft and are driven by the adjusting shaft to rotate up and down back and forth; each first cutter has an adjusting hole that cooperates with the adjusting shaft, and the corresponding first cutter is rotated by inserting the adjusting shaft into the adjusting hole of the corresponding first cutter.

6. The bending center with automatic tool changing function according to claim 1, characterized in that: Each second cutter is equipped with a limit rod and an adjusting cylinder at its upper end. The limit rod is movably mounted on the second cutter, and the adjusting cylinder is mounted on the second cutter and drives the limit rod to move up and down. The second adjusting drive unit includes a movable rod and a fourth drive mechanism. The movable rod is movably mounted on the mounting frame, and the lower end face of the movable rod is integrally recessed with multiple horizontally spaced limiting grooves. The limit rod on each second cutter corresponds vertically to the corresponding limiting groove, and the limit rod moves upward and extends into the limiting groove. The fourth drive mechanism is mounted on the mounting frame and drives the movable rod to move horizontally back and forth.

7. The bending center with automatic tool changing function according to claim 1, characterized in that: The first tool adjustment assembly also includes a fixing plate and a third drive mechanism. The fixing plate is mounted on the mounting plate and is located directly above the first tool. The lower end of the fixing plate is provided with a buckle that cooperates with the first tool. The third drive mechanism is mounted on the mounting plate and drives the fixing plate to rotate up and down.

8. The bending center with automatic tool changing function according to claim 1, characterized in that: It also includes two feeding devices, arranged symmetrically on the left and right sides. Both feeding devices are mounted on the frame and located in front of the support plate. Each feeding device includes a feeding frame, a movable plate, a first feeding drive mechanism, a feeding rod, and a second feeding drive mechanism. The feeding frame is mounted on the frame and located below the front side of the support plate. The movable plate is mounted on the feeding frame and can move back and forth laterally. The first feeding drive mechanism is mounted on the feeding frame and drives the movable plate to move back and forth laterally. The feeding rod is mounted on the movable plate and moves back and forth laterally with the movable plate. The feeding rod extends upwards beyond the upper surface of the support plate. The second feeding drive mechanism is mounted on the movable plate and drives the feeding rod to move back and forth laterally.

9. The bending center with automatic tool changing function according to claim 1, characterized in that: The first cutter head holder drive unit includes a movable seat, a second motor, a second reducer, and a drive shaft. The movable seat is movably mounted on the frame and located behind the cutter head holder, with the rear end of the cutter head holder hinged to the movable seat. The second motor is mounted on the frame. The second reducer is connected to the output end of the second motor. One end of the drive shaft is connected to the output end of the second reducer and is driven to rotate back and forth by the second reducer. The other end of the drive shaft engages with the movable seat and drives the movable seat to move back and forth.

10. The bending center with automatic tool changing function according to claim 1, characterized in that: The second cutter head holder drive unit includes a third motor, a third reducer, a second eccentric shaft, and a second connecting rod. The third motor is mounted on the frame. The third reducer is mounted on the frame and connected to the output end of the third motor. The second eccentric shaft is mounted on the output end of the third reducer and is driven by the third reducer to rotate back and forth. One end of the second connecting rod is connected to the second eccentric shaft and is driven by the second eccentric shaft to move back and forth. The other end of the second connecting rod is hinged to the lower end of the cutter head holder, thereby driving the cutter head holder to move back and forth.

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