Tool changing assembly of bending machine

Abstract

The utility model discloses a tool changing assembly of a bending machine. The tool changing assembly comprises a tool rest, a first tool set, a first tool driving assembly, a first sliding rail, a second tool set and a second tool driving assembly. The first sliding rail is arranged at the lower bottom of the tool rest in a transverse extending mode, and the first sliding rail and the lower end face of the tool rest are fixedly installed together. The sliding seat is matched with the first sliding rail and located under the tool rest, so that during installation, an additional limiting plate is not needed to limit the sliding seat in the vertical direction, in the machining process, the installation precision of the front side wall face and the rear side wall face of the sliding seat does not need to be considered, the machining precision requirement is lower, and the machining cost is effectively reduced; the pressure in the vertical direction can be directly borne through the lower end face of the tool rest, so that the overall structure is prevented from being damaged due to overlarge pressure in the vertical direction, and the overall service life is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of bending machines, and in particular to a tool changing assembly for a bending machine. 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, slider 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.

[0003] Existing bending machines employ automatic tool changers for rapid tool switching. These automatic tool changers include multiple laterally sliding tools that are combined to create different sized combinations. The existing sliding tools move via rails mounted on the side wall of the tool holder. However, this structure requires a limiting plate above the rail to restrict the tool's vertical movement. Therefore, during installation, the top surface of the slide block must be in close contact with the limiting plate, resulting in high precision requirements and increased processing costs. Furthermore, the lateral installation of the rails requires greater locking force to counteract the vertical pressure when bending the product downwards, which can damage the rail structure over time, affecting the overall lifespan. Therefore, it is necessary to further improve the existing tool changing structure. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main objective is to provide a tool changing assembly for a bending machine, which can effectively solve the problems of high machining accuracy requirements, high machining costs, and short service life of existing tool changing structures.

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

[0006] A tool changing assembly for a bending machine includes a tool holder, a first tool group, a first tool drive assembly, a first slide rail, a second tool group, and a second tool drive assembly. The tool holder is mounted on an external bending machine and is driven to move back and forth by the external bending machine. The first tool group is mounted on the tool holder and can be rotated up and down. The first tool group includes multiple first tools arranged in sequence. The first tool drive assembly is mounted on the tool holder and drives the corresponding first tools to rotate up and down. The first slide rail extends laterally to the lower bottom of the tool holder and is fixedly installed to the lower end face of the tool holder. The second tool group includes multiple second tools arranged laterally. The multiple second tools cooperate with the first slide rail and are located on both sides of the first tool group. Each second tool includes a slide block and a cutter head. The slide block cooperates with the first slide rail and is located directly below the tool holder. The cutter head is mounted on the slide block and slides laterally back and forth with the slide block. The second tool drive assembly is mounted on the tool holder and drives the corresponding second tool to move back and forth laterally. There are two second tool drive assemblies arranged laterally at intervals.

[0007] As a preferred embodiment, the first tool drive assembly 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 tool holder and located beside the first tool set, 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.

[0008] As a preferred option, the tool holder is provided with mounting heads that cooperate with an external bending machine. There are two mounting heads arranged laterally symmetrically. The first drive mechanism and the second drive mechanism are located on the left and right sides of the mounting base, respectively, and the outer ends of the first drive mechanism and the second drive mechanism are located on the inner side of the corresponding mounting head.

[0009] 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.

[0010] As a preferred embodiment, the slide is provided with a slot; each second tool drive assembly includes a movable seat, a third drive mechanism, a movable head, and a fourth drive mechanism; the movable seat is movably mounted on the tool holder and located above the second tool; the third drive mechanism is mounted on the frame and drives the movable seat to move laterally back and forth; the movable head can extend downward and is mounted on the movable seat in cooperation with the slot and moves back and forth with the movable seat; the fourth drive mechanism is mounted on the movable seat and drives the movable head to move back and forth.

[0011] As a preferred embodiment, the tool holder is provided with two laterally extending conveyor belts. The outer ends of the two conveyor belts are located on the left and right sides of the frame, respectively. The inner ends of the two conveyor belts are arranged vertically at intervals and overlap each other laterally. The overlapping part is located directly above the first tool group. The movable seat cooperates with the corresponding conveyor belt. The third drive mechanism drives the corresponding conveyor belt to drive back and forth, thereby driving the corresponding movable seat to move back and forth laterally.

[0012] As a preferred embodiment, the tool holder is provided with a second slide rail extending laterally, the second slide rail being located below the rack, and the movable seat slidingly engaging with the second slide rail.

[0013] As a preferred embodiment, a laterally extending limiting rod is provided on the slide of the second tool in the second tool group near the first tool group. The limiting rod extends toward the first tool group, and each of the first tools is provided with a fixing groove that cooperates with the limiting rod.

[0014] As a preferred option, the slide of the second tool in another second tool set, which is closer to the first tool set, is provided with a through groove that cooperates with the limiting rod.

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

[0016] It is set at the bottom of the tool holder by extending laterally through the first slide rail, which is fixedly installed together with the lower end face of the tool holder. It also cooperates with the slide block and is located directly below the tool holder. During installation, no additional limiting plate is needed to limit the vertical movement of the slide block. Therefore, during the processing, there is no need to consider the installation accuracy of the front and rear side walls of the slide block, the processing accuracy requirement is lower, and the processing cost is effectively reduced. Moreover, during the pressing down of the tool, the lower end face of the tool holder can directly bear the pressure in the vertical direction, thereby avoiding excessive pressure in the vertical direction and damaging the overall structure, thus ensuring the overall service life.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of another preferred embodiment of the present utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the first tool driving assembly in a preferred embodiment of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the first cutting tool in a preferred embodiment of the present invention;

[0023] Figure 6 yes Figure 1 Enlarged diagram of point B in the middle.

[0024] Explanation of reference numerals in the attached diagram:

[0025] 10. Tool holder 11. Mounting head

[0026] 13. Second slide rail 14. Conveyor belt

[0027] 20. First tool group 201. Fixing groove

[0028] 21. First cutting tool

[0029] 22. First limiting part; 30. First tool drive assembly

[0030] 301. Receiving groove; 302. First limiting groove

[0031] 303, Second limiting groove; 31, Mounting base

[0032] 32. Movable frame; 33. First drive mechanism

[0033] 34. Flip axis 35. Moving axis

[0034] 36. Second drive mechanism; 40. First slide rail

[0035] 50. Second tool set 501. Slot

[0036] 502, through groove

[0037] 51. Second cutting tool; 511. Slide.

[0038] 512, cutter head; 513, limit rod

[0039] 60. Second tool drive assembly; 61. Movable seat

[0040] 62. Third drive mechanism 63. Movable head

[0041] 64. Fourth drive mechanism. Detailed Implementation

[0042] Please refer to Figures 1 to 6 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a tool holder 10, a first tool group 20, a first tool drive assembly 30, a first slide rail 40, a second tool group 50, and a second tool drive assembly 60.

[0043] The tool holder 10 is mounted on an external bending machine and moved back and forth by the external bending machine. In this embodiment, the tool holder 10 is provided with mounting heads 11 that cooperate with the external bending machine. There are two mounting heads 11 arranged laterally symmetrically. The tool holder is vertically mounted to the external bending machine through the mounting heads 11. The tool holder 10 is provided with a second slide rail 13 that extends laterally and is located below the rack 12. The tool holder 10 is provided with two laterally extending conveyor belts 14. The outer ends of the two conveyor belts 14 are located on the left and right sides of the frame 10, respectively. The inner ends of the two conveyor belts 14 are arranged vertically at intervals and overlap each other laterally, and the overlapping part is located directly above the first tool group 20.

[0044] The first tool assembly 20 is rotatably mounted on the tool holder 10, and includes a plurality of first tools 21 arranged in sequence. In this embodiment, a first limiting part 22 is provided on the first tool 20.

[0045] The first tool drive assembly 30 is mounted on the tool holder 10 and drives the corresponding first tool 21 to rotate back and forth. In this embodiment, the first tool drive assembly 30 includes a mounting base 31, a movable frame 32, a first drive mechanism 33, a flipping shaft 34, a moving shaft 35, and a second drive mechanism 36. The mounting base 31 is mounted on the tool holder 10 and located beside the first tool assembly 20, and has a receiving groove 301. The movable frame 32 is movably mounted on the mounting base 31. The first drive mechanism 33 is mounted on the mounting base 31 and drives the movable frame 32 to move back and forth. The flipping shaft 34 is rotatably mounted on the movable frame 32 and rotates back and forth with the movable frame 35. The movable frame 32 moves back and forth laterally; the movable shaft 35 is located at the outer end of the flip shaft 34 and moves back and forth laterally with the flip shaft 34. The flip shaft 34 can flip back and forth relative to the movable shaft 35. The second drive mechanism 36 is located on the movable frame 32 and drives the flip shaft 34 to rotate back and forth. The aforementioned plurality of first tools 21 are hung on the movable shaft 35 and the flip shaft 34 and are located in the receiving groove 301. The plurality of first tools are engaged or disengaged from the flip shaft 34 as the movable shaft 35 and the flip shaft 34 move. The first tool 21 engaged in the flip shaft 34 is driven by the flip shaft 34 to flip up and down. The first drive mechanism 33 and the second drive mechanism 36 are located on the left and right sides of the mounting base 31, respectively, and the outer ends of the first drive mechanism 33 and the second drive mechanism 36 are located on the inner side of the corresponding mounting head 11. In the existing tool changing assembly, the two drive mechanisms are located on the same side of the mounting base 31. Since the first drive mechanism 33 drives the movable frame 32 to move, and the second drive mechanism 36 is located on the movable frame 32, the first drive mechanism 33 needs to be set outside the second drive mechanism 36 during installation. If the first drive mechanism 33 and the second drive mechanism 36 are on the same side, the first drive mechanism needs to extend outward by a sufficient distance. At this time, when the tool holder 10 moves up and down, the first drive mechanism 33 is prone to interference with the connection part of the external bending machine. Therefore, the left and right sides of the first drive mechanism 33 and the second drive mechanism 36 can effectively avoid interference with the external bending machine.

[0046] The rotating shaft 34 is recessed with a first limiting groove 302 that cooperates with the first limiting part 22, and the moving shaft 35 is recessed with a second limiting groove 303 that cooperates with the first limiting part 22. The first cutter 21 is engaged or disengaged from the rotating shaft 34 through the cooperation of the first limiting part 22, the first limiting groove 302, and the second limiting groove 303, thereby driving the first cutter 21 that is engaged on the rotating shaft 34 to rotate up and down. The side wall of the receiving groove 301 is provided with a second limiting part (not shown in the figure) that cooperates with the second limiting groove 303, which is used to limit the moving shaft 35 and prevent the moving shaft 35 from rotating.

[0047] The first slide rail 40 extends laterally and is disposed at the lower bottom of the tool holder 10. The first slide rail 40 is fixedly installed together with the lower end face of the tool holder 10.

[0048] The second tool assembly 50 includes a plurality of second tools 51 arranged laterally. Each second tool 51 engages with a first slide rail 40 and is located on both sides of the first tool assembly 20. Each second tool 51 includes a slide block 511 and a cutting head 512. The slide block 511 engages with the first slide rail 40 and is located directly below the tool holder 10. The cutting head 512 is mounted on the slide block 511 and slides laterally back and forth with the slide block 511. In this embodiment, the slide block 511 is provided with a slot 501. The aforementioned rack 12 is located above the plurality of second tools 51, allowing the rack 12 to connect the plurality of second tools 51 located on both sides of the first tool assembly 20. In one of the second tool assemblies 50, the slide block 511 of the second tool 51 closest to the first tool assembly 20 is provided with a laterally extending limiting rod 513. The limiting rod 513 extends toward the first tool assembly 20, and each of the first tools 21 has a fixing groove 201 that engages with the limiting rod 513. When the first cutter 21 flips downwards, the second tool group 50, through its combined cutting mechanism, causes the limiting rod 513 to extend inwards into the corresponding fixing groove 201, thereby fixing the first cutter 21. This replaces the existing snap-fit ​​fixing structure, resulting in a simpler overall structure. In another second tool group 50, the slide 511 of the second cutter 51 near the first tool group 20 has a through groove 502 that mates with the limiting rod 513. This through groove 502 allows the limiting rod 513 to pass through the fixing groove 201 and extend inwards into the through groove 502.

[0049] The second tool drive assembly 60 is mounted on the tool holder 10 and drives the corresponding second tool 51 to move laterally back and forth. Two second tool drive assemblies 60 are arranged laterally at intervals. In this embodiment, each second tool drive assembly 60 includes a movable seat 61, a third drive mechanism 62, a movable head 63, and a fourth drive mechanism 64. The movable seat 61 is movably mounted laterally on the tool holder 10 and located above the second tool 50. The third drive mechanism 62 is mounted on the frame 10 and drives the movable seat 61 to move laterally back and forth. The movable head 63 extends downward and is mounted on the movable seat 61 in conjunction with a slot 501, moving back and forth with the movable seat 61. The fourth drive mechanism 64 is mounted on the movable seat 61 and drives the movable head 63 to move back and forth. The movable head 63 moves downward and engages with the corresponding slot 501, thereby driving the corresponding number of second tools 51 to move laterally back and forth. The movable seat 61 slides against the second slide rail 13, ensuring the stability of the movable seat 61 during its movement. The movable seat 61 cooperates with the corresponding conveyor belt 14, and the third drive mechanism 62 drives the corresponding conveyor belt 14 to move back and forth, thereby driving the corresponding movable seat 61 to move laterally back and forth. The overlapping part between the two conveyor belts 14 prevents the two second tool drive assemblies 60 from interfering with other structures during the movement.

[0050] The key design feature of this invention is that a first slide rail extends laterally and is fixedly installed at the bottom of the tool holder. The slide rail is also fitted with the first slide rail and positioned directly below the tool holder. This eliminates the need for additional limiting plates to restrict the slide rail's vertical movement during installation. Consequently, the installation accuracy of the slide rail's front and rear sidewalls is not required during processing, resulting in lower processing accuracy requirements and reduced processing costs. Furthermore, during the pressing process, the lower end face of the tool holder can directly bear the vertical pressure, preventing excessive vertical pressure from damaging the overall structure and ensuring a longer service life.

[0051] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A tool changer assembly for a bending machine, characterized by: The utility model provides a first tool driving assembly, a second tool driving assembly, a first tool group, a first tool frame, a second tool group and a tool frame, the tool frame is arranged on the external bending machine and is driven by the external bending machine to move back and forth, the first tool group is reversibly arranged on the tool frame, and the first tool group comprises a plurality of first tools arranged in sequence, the first tool driving assembly is arranged on the tool frame and drives corresponding first tools to reversibly turn over, the first slide rail is horizontally arranged on the lower bottom of the tool frame, and the first slide rail and the lower end surface of the tool frame are fixedly installed together, the second tool group comprises a plurality of second tools arranged in sequence horizontally, the plurality of second tools are matched with the first slide rail and located on both sides of the first tool group, each second tool comprises a slide and a tool head, the slide is matched with the first slide rail and located directly below the tool frame, the tool head is arranged on the slide and horizontally slides back and forth with the slide, the second tool driving assembly is arranged on the tool frame and drives corresponding second tools to horizontally move back and forth, and the second tool driving assembly is two horizontally spaced apart.

2. The bender tool changer assembly of claim 1, wherein: The first tool driving assembly comprises a mounting seat, a movable frame, a first driving mechanism, a turnover shaft, a moving shaft and a second driving mechanism, the mounting seat is arranged on the tool frame and located on the side of the first tool group, the mounting seat is provided with a containing groove, the movable frame is reversibly arranged on the mounting seat and horizontally moves back and forth, the first driving mechanism is arranged on the mounting seat and drives the movable frame to move back and forth, the turnover shaft is reversibly arranged on the movable frame and horizontally moves back and forth with the movable frame, the moving shaft is arranged at the outer end of the turnover shaft and horizontally moves back and forth with the turnover shaft, the turnover shaft can reversibly turn over relative to the moving shaft, the second driving mechanism is arranged on the movable frame and drives the turnover shaft to rotate back and forth, the plurality of first tools are hung on the moving shaft and the turnover shaft and located in the containing groove, the plurality of first tools are clamped into or separated from the turnover shaft when the moving shaft and the turnover shaft move, and the first tool clamped into the turnover shaft is driven by the turnover shaft to reversibly turn over.

3. The bender tool changer assembly of claim 2, wherein: The tool frame is provided with a mounting head matched with the external bending machine, the mounting head is horizontally symmetrically arranged in two, the first driving mechanism and the second driving mechanism are respectively located on the left and right sides of the mounting seat, and the outer ends of the first driving mechanism and the second driving mechanism are located on the inner side of the corresponding mounting head.

4. The bender tool changer assembly of claim 2, wherein: The first tool is provided with a first limiting portion, the turnover shaft is recessed with a first limiting groove matched with the first limiting portion, the moving shaft is recessed with a second limiting groove matched with the first limiting portion, the first tool is clamped into or separated from the turnover shaft through the cooperation of the first limiting portion, the first limiting groove and the second limiting groove, and the side wall of the containing groove is convex with a second limiting portion matched with the second limiting groove.

5. The bender tool changer assembly of claim 1, wherein: The slide is provided with a clamping slot; each second cutter driving assembly comprises a movable seat, a third driving mechanism, a movable head and a fourth driving mechanism; the movable seat is movably arranged on the tool rest above the second cutter and can move back and forth laterally, the third driving mechanism is arranged on the frame and drives the movable seat to move back and forth laterally, the movable head can extend downward and is arranged on the movable seat in cooperation with the clamping slot and moves back and forth with the movable seat; the fourth driving mechanism is arranged on the movable seat and drives the movable head to move back and forth.

6. The bender tool changer assembly of claim 5, wherein: The tool rest is provided with two transversely extending conveying belts, the outer ends of the two conveying belts are respectively located on the left and right sides of the frame, the inner ends of the two conveying belts are arranged in an up-down interval and transversely overlap with each other, and the overlapping part is located directly above the first cutter group, the movable seat cooperates with the corresponding conveying belt, and the third driving mechanism drives the corresponding conveying belt to drive the corresponding movable seat to move back and forth laterally.

7. The bender tool changer assembly of claim 5, wherein: The tool rest is provided with a transversely extending second slide rail, and the second slide rail is located below the rack.

8. The bender tool changer assembly of claim 1, wherein: The slide of the second cutter near the first cutter group on one side is provided with a transversely extending limiting rod, the limiting rod extends towards the first cutter group, and the first cutter is provided with a fixing slot matched with the limiting rod.

9. The bender tool changer assembly of claim 8, wherein: The slide of the second cutter near the first cutter group on the other side is provided with a through slot matched with the limiting rod.

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