Bending center cutter splicing device

Abstract

The utility model discloses a bending center splicing cutter device which comprises a sliding cutter assembly. The sliding knife assembly comprises a plurality of sliding knives; the top of each sliding cutter is slidably mounted on the connecting block and can slide in the length direction of the connecting block. Each sliding knife comprises a mold body, a fine adjustment mechanism and a pressing mechanism; the fine adjustment mechanism is arranged on the side, close to the tool nose, of the die body and matched with the front end of the connecting block. The fine adjustment mechanism can adjust the position of a tool nose in the die body in the horizontal direction; the pressing mechanism is arranged on the side opposite to the fine adjustment mechanism in direction, and the pressing mechanism is used for pressing the die body on the connecting block in a gapless mode. According to the utility model, the precision of each sliding knife can be independently adjusted, and the clearance of the die can be compressed, so that the clearance is zero in the die machining process, and the machining precision and consistency of the die are further ensured.

Description

A bending center blade assembly device Technical Field

[0001] This utility model relates to a sheet metal bending processing device, and more particularly to a bending center blade assembly device. Background Technology

[0002] As a crucial component of the manufacturing sector, the sheet metal processing industry has seen a surge in demand for automation and intelligent manufacturing in recent years due to rising labor costs. Sheet metal processing is typically a small-batch, multi-variety operation, requiring frequent workpiece changes. Bending centers are the core equipment in sheet metal manufacturing; their level of automation, processing efficiency, and precision directly determine the industry's technological standard. However, workpiece changes generally necessitate mold replacement, which is time-consuming and labor-intensive if done manually.

[0003] Furthermore, with increasing emphasis on environmental protection in recent years, traditional sheet metal manufacturing processes, in order of process, include cutting, bending, and welding. Welding, in particular, is polluting, energy-intensive, and involves high labor costs; therefore, assembly methods are often used to replace welding. However, for complex workpieces, it is often necessary to assemble the molds during processing. Manually switching molds in this process is clearly impractical. Therefore, automated mold length assembly during processing is a necessity in the industry.

[0004] In recent years, the export of domestic machine tool products has increased year by year. Customers such as South Korea, Russia, Turkey and Mexico are very fond of the automatic tool-joining function, and the market demand is strong.

[0005] Currently, the automatic die-fitting technology in bending centers uses "fitting surfaces" to guide the mold body during installation. However, the following problems exist during its use and need to be improved.

[0006] 1. The machining accuracy of the profile is very high, which usually requires the use of slow wire EDM. The machining efficiency is very low and the machining cost is high, so it cannot be industrialized.

[0007] 2. Since the machining accuracy of multiple molds must be consistent, the accuracy deviation of individual molds will lead to the entire set of molds being returned to the factory for repair or even scrapped. According to actual experience, sometimes the entire set of molds is returned to the factory for repair even 5 to 6 times and still cannot be qualified. The accuracy of the entire set of molds depends entirely on the machining accuracy and cannot be fine-tuned on the machining site.

[0008] 3. Wear and tear will occur after prolonged use, leading to a decrease in precision. There is no way to remedy this, and the only option is to use it with a lower precision standard, resulting in unsatisfactory machining accuracy of the workpiece.

[0009] 4. If the clearance of the "mating surface" is not well controlled, an excessively large clearance will affect the machining accuracy, while an excessively small clearance will cause the mold to jam and malfunction.

[0010] 5. The blade hanging mechanism has a complex structure and requires high manufacturing precision. However, the locking mechanism is unreliable and often fails, causing the machine to stop during processing and even leading to safety accidents.

[0011] 6. The complex structure of the opening and closing blade and its poor guiding rigidity affect the machining accuracy.

[0012] 7. Poor stiffness matching of the sliding cutter, the blade, and the opening / closing cutter leads to inconsistent deformation of the three types of cutters under load, causing accuracy deviations in bending processes. Summary of the Invention

[0013] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a bending center blade assembly device. The precision of each sliding blade in the bending center blade assembly device can be independently adjusted, and the gap between the molds can be pressed to achieve zero gap during mold processing, thereby ensuring the precision and consistency of mold processing.

[0014] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0015] A bending center blade assembly includes a sliding blade assembly.

[0016] The bending center has a slider whose height can be raised and lowered, and a connecting block is provided at the bottom of the slider along the length direction.

[0017] The slide knife assembly includes several slide knives, each slide knife having its top movably connected to a connecting block.

[0018] Each slide cutter includes a mold body, a fine-tuning mechanism, and a clamping mechanism.

[0019] The fine-tuning mechanism is located on the side of the mold body near the blade tip and is adapted to the front end of the connecting block; the fine-tuning mechanism can adjust the horizontal position of the blade tip in the mold body.

[0020] The clamping mechanism is located on the side opposite to the fine-tuning mechanism, and is used to press the mold body against the connecting block without gaps.

[0021] The fine-tuning mechanism includes adjustment blocks and adjustment elements.

[0022] The adjusting block is integrated with or separate from the mold body, and the top of the adjusting block is provided with a load-bearing positioning surface that can cooperate with the connecting block.

[0023] The adjusting element can adjust the horizontal position of the cutting tip in the mold body.

[0024] The adjustment block located below the bearing positioning surface is integrally or separately connected to the mold body to form a movable connection point.

[0025] The adjusting element adjusts the adjusting block to form a lever structure with the movable connection point as the fulcrum of rotation, thereby adjusting the position of the bearing positioning surface and thus adjusting the horizontal position of the cutting tip in the mold body.

[0026] The adjusting block is set separately from the mold body. The middle or upper part of the adjusting block located below the bearing positioning surface is hinged to the mold body, and the hinge point is the rotation fulcrum.

[0027] The adjusting block is integrally set with the mold body. The middle or upper part of the adjusting block located below the bearing positioning surface has an integrally set flexible connection point with the mold body. There is a stress relief groove between the adjusting block and the mold body below the flexible connection point. The flexible connection point is a rotation fulcrum.

[0028] The adjusting block is slidably separated from the mold body. Driven by the adjusting element, the adjusting block can cooperate with the sliding pair of the mold body to adjust the position of the bearing positioning surface, thereby adjusting the horizontal position of the cutting tip in the mold body.

[0029] The adjusting block and the mold body are fitted with a lateral sliding pair; during the lateral sliding process, the guide is provided by the laterally set guide.

[0030] The adjusting block and the mold body are fitted with a vertical sliding pair; the adjusting element drives the vertical sliding of the adjusting block through a tapered surface fit.

[0031] The adjustment element is an adjustment screw, which engages with the threaded pair of the adjustment block or the mold body. By rotating the adjustment screw, the horizontal position accuracy of the cutting tip in the mold body can be adjusted.

[0032] The fine-tuning mechanism includes adjusting screws.

[0033] The top of the mold body is provided with a load-bearing positioning protrusion.

[0034] The adjusting screw engages with the threaded pair of the bearing positioning protrusion, and the end of the adjusting screw passes through the bearing positioning protrusion and engages directly or indirectly with the connecting block; by rotating the adjusting screw, the horizontal position accuracy of the cutting tip in the mold body can be adjusted.

[0035] The clamping mechanism includes clamping components and clamping power elements.

[0036] The clamping element has a clamping mating surface that mates with the connecting block.

[0037] The clamping power element drives the clamping component to move, so that the clamping mating surface is pressed against the connecting block without gap; wherein, the driving direction of the clamping power element is opposite to, the same as or perpendicular to the clamping direction of the clamping component.

[0038] The clamping component is a clamping arm, with the clamping mating surface located at the top of the clamping arm, and the clamping arm is hinged to the mold body.

[0039] The clamping power element drives the clamping arm in the opposite direction to the clamping direction of the clamping arm.

[0040] The clamping power element is either a direct drive assembly for the clamping arm or an indirect drive assembly for the clamping arm; wherein,

[0041] The clamping arm direct drive assembly includes spring, pneumatic, electric, or manual systems.

[0042] The clamping arm indirect drive assembly includes a plunger and a plunger telescopic drive mechanism; the plunger telescopic drive mechanism can be spring-driven, pneumatic, electric, or manual.

[0043] The clamping element is a clamping block or a plunger; the clamping mating surface is provided on the inner side of the clamping element.

[0044] The driving direction of the clamping power element on the clamping part is the same as the clamping direction of the clamping part.

[0045] The clamping element is a horizontally arranged clamping block; one side of the clamping block is provided with the clamping mating surface, and the other side of the clamping block is provided with a driving inclined surface.

[0046] The clamping power element is engaged with the driving inclined sliding pair, and the driving direction of the clamping power element on the clamping part is perpendicular to the clamping direction of the clamping part.

[0047] A bending center blade assembly includes an opening and closing center blade assembly disposed in the middle of a connecting block.

[0048] The opening and closing center blade assembly includes a center blade holder, a vertical blade, a vertical blade lifting mechanism, two side blades, and an X-axis opening and closing mechanism.

[0049] The middle knife holder is mounted on the connecting block.

[0050] The vertical cutter and the middle cutter holder are in a sliding pair in the vertical Y direction, and can actively slide along the middle cutter holder in the vertical Y direction under the drive of the vertical cutter lifting mechanism.

[0051] Two side blades are symmetrically arranged at the bottom of the center blade holder on both sides of the vertical blade. Each side blade can perform opening and closing movements along the X-direction of the connecting block length under the drive of the X-direction opening and closing mechanism.

[0052] The center knife holder has center knife guide protrusions on both sides.

[0053] The vertical cutter lifting mechanism includes a lifting rod, a lifting drive device, and a locking plunger.

[0054] The lifting drive device is connected to the vertical blade via a lifting rod, thereby driving the vertical blade to slide vertically along the middle blade holder in the Y direction.

[0055] The locking plunger is used to lock the lifting rod.

[0056] It also includes two sets of blade library components.

[0057] A set of blade magazine assemblies is provided on each side of the blade assembly during opening and closing.

[0058] Each blade magazine assembly includes a blade hanging mechanism and several blades;

[0059] The tool holder mechanism includes a blade holder, a support base, and a Z-axis drive mechanism.

[0060] The support base is located on the outer side of the slider.

[0061] The upper part of the blade holder is slidably connected to the support base in the Z-direction, and all the blades are movably mounted on the lower part of the blade holder; each blade can rotate.

[0062] The Z-axis drive mechanism can drive the blade holder to reciprocate along the Z-axis perpendicular to the slider, thereby realizing the blade removal or hanging action.

[0063] Each blade magazine assembly also includes a gap distribution mechanism.

[0064] The gap distribution mechanism includes a gap distribution plate and a gap adjustment drive device.

[0065] The gap distribution plate is slidably mounted on the knife hanging mechanism.

[0066] The X-axis opening and closing mechanism includes two shift forks and two sets of shift fork X-axis opening and closing drive devices.

[0067] Two shift forks are arranged on two evenly spaced plates or on two tool hanging mechanisms other than the evenly spaced plates.

[0068] The bottom of each shift fork is connected to the corresponding side blade.

[0069] The X-axis opening and closing drive device can drive the corresponding blade magazine assembly to slide along the X-axis, thereby synchronously driving the corresponding shift fork and side blade to slide along the X-axis, realizing the opening and closing motion of the two side blades.

[0070] The gap adjustment drive device can drive the gap distribution plate to slide along the X direction.

[0071] This utility model has the following beneficial effects:

[0072] 1. This utility model does not require high processing precision, has low production and manufacturing costs, high efficiency, and can be industrialized.

[0073] 2. This utility model can fine-tune the precision. When the precision of the customer's on-site processing deviates, the precision can be adjusted conveniently and quickly.

[0074] 3. This utility model uses a clamping mechanism to press the gap, which can ensure zero gap during mold processing and ensure the stability and consistency of precision.

[0075] 4. When individual molds have precision problems, this utility model can be easily interchanged without the need for rework of the entire set of molds.

[0076] 5. The blade hanging mechanism is simple in structure, convenient, easy to manufacture, and the blade hanging action is safe and reliable.

[0077] 6. The opening and closing center knife adopts a center knife holder fixed structure, which has high guiding rigidity, simple manufacturing and processing, low cost and higher precision.

[0078] 7. This utility model can also match the structural stiffness of different types of molds through numerical simulation technology, so that the stiffness of different types of molds is similar, ensuring that the elastic deformation of different types of molds remains consistent during processing, and further improving processing accuracy.

[0079] 8. This utility model can also ensure the consistency of deformation of each mold by using the "stop block protrusion" of the mold when the mold is not subjected to force along its entire length.

[0080] 9. The gap distribution mechanism in this utility model can reduce the gap and improve the quality of bending processing. Attached Figure Description

[0081] Figure 1 shows a schematic diagram of the structure of a bending center blade assembly device according to the present invention.

[0082] Figure 2 shows a three-dimensional line drawing of the slide knife assembly in this utility model.

[0083] Figure 3 shows a schematic diagram of the cross-sectional connection structure between the slide knife and the connecting block in this utility model.

[0084] Figure 4 shows a schematic diagram of the line structure of the opening and closing blade assembly in this utility model.

[0085] Figure 5 shows a schematic diagram of the opening and closing middle knife assembly of this utility model; wherein, (a) is a partial three-dimensional structure of the opening and closing middle knife assembly; (b) is a partial enlarged schematic diagram of the middle knife holder; (c) is a partial perspective view of the installation of the middle knife holder and the side knife; (d) is a schematic diagram of the positioning and guiding assembly of the middle knife holder and the slide knife; and (e) is a schematic diagram of the positioning and guiding assembly of the middle knife holder and the blade.

[0086] Figure 6 shows a line structure diagram of the blade magazine assembly in this utility model.

[0087] Figure 7 shows a three-dimensional schematic diagram of the installation position of the blade magazine assembly and the slider in this invention.

[0088] Figure 8 shows a three-dimensional schematic diagram of the tool selection mechanism in the blade magazine assembly of this utility model.

[0089] Figure 9 shows a three-dimensional schematic diagram of the blade rotation in the blade magazine assembly of this utility model.

[0090] Figure 10 shows a schematic diagram of the blade hanging, unloading, and rotation in this utility model; wherein, (a) is a schematic diagram of hanging the blade; (b) is a schematic diagram of unloading the blade after sliding in the Z direction; and (c) is a schematic diagram of rotating the blade after unloading.

[0091] Figure 11 shows a structural schematic diagram of embodiment 1 of the fine-tuning mechanism in this utility model; wherein, (a) is a three-dimensional schematic diagram with the hinge point located in the middle; (b) is a cross-sectional view with the hinge point located in the middle; and (c) is a three-dimensional view with the hinge point located at the bottom.

[0092] Figure 12 shows a schematic diagram of the structure of embodiment 2 of the fine-tuning mechanism in this utility model; wherein, (a) is a three-dimensional schematic diagram; (b) is a side view; and (c) is a partial cross-sectional view.

[0093] Figure 13 shows a simulation diagram of the fine-tuning principle of Embodiment 2 of the fine-tuning mechanism in this utility model.

[0094] Figure 14 shows a schematic diagram of the structure of the fine-tuning mechanism in Embodiment 3 of this utility model without the addition of shims to the adjusting screw; wherein, (a) is a three-dimensional schematic diagram; and (b) is a partial cross-sectional view.

[0095] Figure 15 shows a schematic diagram of the structure of the adjusting screw with added shims in embodiment 3 of the fine-tuning mechanism of this utility model; wherein, (a) is a three-dimensional schematic diagram; and (b) is a partial cross-sectional view.

[0096] Figure 16 shows a structural schematic diagram of embodiment 4 of the fine-tuning mechanism in this utility model; wherein, (a) is a three-dimensional schematic diagram of the first sliding pair in embodiment 4; (b) is a cross-sectional view of (a); (c) is a three-dimensional schematic diagram of the second sliding pair in embodiment 4; and (d) is a diagram of another arrangement of the adjusting screw.

[0097] Figure 17 shows a structural schematic diagram of embodiment 5 of the fine-tuning mechanism in this utility model; wherein, (a) is a three-dimensional schematic diagram; (b) is a cross-sectional view of (a); (c) is a partially enlarged cross-sectional view; (d) is a three-dimensional schematic diagram of the mold body; and (e) is a diagram of another arrangement of the adjusting screws.

[0098] Figure 18 shows a simulation diagram of mold stiffness matching in the slide knife assembly of this utility model; wherein, (a) is a simulation diagram of mold stiffness matching in Example 1; and (b) is a simulation diagram of mold stiffness matching in Example 3.

[0099] Figure 19 shows a schematic diagram of the structure of embodiment 1 of the clamping mechanism in this utility model; wherein, (a) is a three-dimensional schematic diagram; (b) is a cross-sectional view, wherein the plunger telescopic drive mechanism is a spring; (c) is a cross-sectional view, wherein the plunger telescopic drive mechanism is a controllable push method; (d) is a cross-sectional view when the clamping arm direct drive assembly is a spring; and (e) is another layout diagram of the hinge point.

[0100] Figure 20 shows a schematic diagram of the pressing element being a pressing block in Embodiment 2 of the pressing mechanism of this utility model; wherein, (a) is a three-dimensional schematic diagram; and (b) is a partial enlarged cross-sectional view.

[0101] Figure 21 shows a schematic diagram of the clamping component being a plunger in Embodiment 2 of the present invention; wherein, (a) is a three-dimensional schematic diagram; (b) is a partial cross-sectional view, wherein the lateral sliding drive mechanism is a spring; and (c) is a partial cross-sectional view, wherein the lateral sliding drive mechanism is a controllable pushing mechanism.

[0102] Figure 22 shows a schematic diagram of the structure of embodiment 3 of the clamping mechanism in this utility model; wherein, (a) is a schematic diagram of the plunger 2 being driven vertically in a controllable manner; (b) is a schematic diagram of the plunger 2 being driven horizontally in a controllable manner; (c) is a schematic diagram of the plunger 2 and the clamping spring being driven vertically; and (d) is a schematic diagram of the plunger 2 and the clamping spring being driven horizontally.

[0103] Figure 23 shows two variations of the surface fit between the connecting block and the slide in this invention: (a) is a conical fit; (b) is a groove fit.

[0104] Figure 24 shows four schematic diagrams of the clamping mechanism of this utility model using manual clamping; among them, (a) is a schematic diagram of direct clamping using screws; (b) is a schematic diagram of manual clamping using screws and plungers; (c) is a schematic diagram of manual clamping using screws and clamping arms; and (d) is a schematic diagram of manual clamping using screws and clamping blocks.

[0105] Among them are:

[0106] 10. Slider; 11. Connecting block;

[0107] 20. Opening and closing center blade assembly; 21. Center blade holder; 211. Center blade guide protrusion; 22. Vertical blade; 221. Lifting rod; 222. Lifting drive device; 223. Locking plunger; 23. Side blade; 24. X-axis opening and closing mechanism; 241. Shift fork; 242. X-axis opening and closing drive device;

[0108] 30. Blade library assembly;

[0109] 31. Tool holder mechanism; 311. Blade holder; 312. Support base; 313. Z-axis drive device;

[0110] 32. Tool selection mechanism; 321. Connecting plate; 322. Moving frame; 323. Positioning pin; 324. Tool selection drive device;

[0111] 33. Blade rotation mechanism; 331. Blade rotation shaft; 332. Rotating pin; 333. Blade rotation drive device;

[0112] 34. Gap distribution mechanism; 341. Gap distribution plate; 342. Gap adjustment drive device;

[0113] 35. Blade; 351. Rotating hole; 352. Positioning hole; 353. Blade locking hook; 354. Locking hole; 355. Blade clearance groove;

[0114] 40. Sliding cutter assembly; 41. Sliding cutter; 411. Mold body; 412. Sliding cutter clearance groove;

[0115] 42. Sliding cutter drive mechanism; 421. Driving bar; 422. X-axis sliding drive device;

[0116] 50. Fine-tuning mechanism; 51. Adjusting block; 511. Bearing positioning surface; 512. Bearing positioning protrusion; 52. Adjusting screw; 521. Height adjustment cone surface; 53. Rotating pin; 54. Stress relief groove; 55. Flexible connection point; 56. Shim; 57. Guide component; 58. Return spring; 59. Stiffness adjustment hole;

[0117] 60. Clamping mechanism; 61. Clamping arm; 611. Clamping mating surface; 62. Piston; 63. Spring; 64. Clamping block; 641. Lateral sliding guide pin; 642. Lateral sliding drive mechanism; 65. Piston one; 66. Clamping block; 661. Piston two; 662. Clamping spring. Detailed Implementation

[0118] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0119] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0120] As shown in Figure 1, a bending center blade assembly device includes an opening and closing center blade assembly 20, two sets of blade magazine assemblies 30, and two sets of sliding blade assemblies 40.

[0121] The bending center has a slider 10 whose height can be raised and lowered, and a connecting block 11 is provided at the bottom of the slider along the length direction. The connecting blocks are preferably connected separately, but an integrated design is also considered equivalent.

[0122] The opening / closing central blade assembly is located in the center of the connecting block (it can be fixed or sliding). Two sets of blade magazine assemblies are symmetrically arranged on both sides of the opening / closing central blade assembly, and two sets of sliding blade assemblies are symmetrically arranged on the outer sides of the two sets of blade magazine assemblies. Alternatively, a set of blade magazine assemblies can be placed between the opening / closing central blade assembly and each set of sliding blade assemblies. The two sets of blade magazine assemblies can slide along the slider in the X direction, thus allowing the blade magazine assembly to be positioned between any two sliding blades in the corresponding slider assembly.

[0123] As shown in Figures 1, 4 and 5, the opening and closing center blade assembly includes a center blade holder 21, a vertical blade 22, a vertical blade lifting mechanism, two side blades 23 and an X-direction opening and closing mechanism 24.

[0124] The center knife holder is mounted on the connecting block. The specific structure of the center knife holder is shown in Figure 5(a). Center knife guide protrusions 211 are provided on both sides of the center knife holder, as shown in Figure 5(b), which can improve the guiding stiffness between the side knife and the knife holder.

[0125] The vertical cutter and the middle cutter holder are in a sliding pair in the vertical Y direction, and can actively slide along the middle cutter holder in the vertical Y direction under the drive of the vertical cutter lifting mechanism.

[0126] The aforementioned vertical blade lifting mechanism preferably includes a lifting rod 221, a lifting drive device 222, and a locking plunger 223.

[0127] The lifting drive device is preferably installed on the outside of the slider and connected to the top of the vertical cutter via a lifting rod, thereby driving the vertical cutter to slide vertically in the Y direction along the central cutter holder. The lifting drive device is existing technology, such as known drive devices like motors or cylinders.

[0128] The aforementioned locking plunger is used to laterally lock the lifting rod after it has been raised and lowered, preventing the vertical cutter from shifting upwards during mold loading and affecting machining accuracy. This locking plunger is optional and can be used when the load capacity of the lifting mechanism is relatively weak.

[0129] Two side blades are symmetrically and slidably arranged at the bottom of the center blade holder on both sides of the vertical blade. Each side blade can open and close along the X-axis of the connecting block under the drive of the X-axis opening and closing mechanism. Furthermore, the top of each side blade is in sliding engagement with the bottom of the center blade holder in the X-axis direction.

[0130] In this embodiment, the X-direction opening and closing mechanism includes two shift forks and two sets of shift fork X-direction opening and closing drive devices. The two shift forks are preferably installed on the side of the two sets of blade magazine assemblies adjacent to the side blades. The X-direction opening and closing drive devices can drive the corresponding set of blade magazine assemblies to slide along the X direction, thereby synchronously driving the corresponding shift forks and side blades to slide along the X direction, realizing the opening and closing movement of the two side blades.

[0131] As an alternative, the drive for the side blade is preferably, but not limited to, being installed in the aforementioned X-direction opening and closing mechanism. If a separate moving axis is added, it is considered equivalent based on the principle of this embodiment and is also within the scope of protection of this application.

[0132] The opening and closing blade assembly has two actions: "opening" and "retracting". When the vertical blade rises, the two side blades retract towards the middle, which is the "retracting" action; when the two side blades open to the sides and the vertical blade in the middle lowers, which is the "opening" action.

[0133] As shown in Figures 6 to 9, each blade magazine assembly includes a blade hanging mechanism 31, a blade selection mechanism 32, a blade rotation mechanism 33, a gap distribution mechanism 34, and several blades 35. The gap distribution mechanism is optional and can be omitted.

[0134] The tool holder mechanism includes a blade holder 311, a support base 312, and a Z-axis drive mechanism.

[0135] The support base is preferably mounted on the X-guide rail on the outer side of the slider via a slide plate, and preferably can slide along the X-guide rail under the drive of the X-axis opening and closing drive device. Alternatively, the support base can also be movably mounted on the connecting block, which is fixedly mounted to the slider or integrated into it, with the same principle.

[0136] The upper part of the blade holder is slidably connected to the support base in the Z-direction and can reciprocate along the Z-direction perpendicular to the slider under the drive of the Z-direction drive mechanism. The Z-direction drive mechanism includes a Z-direction slide rail and a Z-direction drive device 313. The Z-direction slide rail is located at the bottom of the support base, and the Z-direction drive device is preferably located on the support base, capable of driving the blade holder to slide along the Z-direction slide rail in the Z-direction. The Z-direction drive device is existing technology, such as a known drive device like a motor or cylinder.

[0137] Several blades 35 are positioned below the blade holder. The required number of blades can be flipped up and down according to the desired blade assembly size. Blades flipped to the bottom are used for bending, while those flipped to the top remain unused. The final blade assembly size is calculated by adding the length of the opening / closing blade, the length of the blade flipped to the bottom, the length of the sliding blade, and the blade assembly gap. However, the following principle applies:

[0138] 1) Use as few blades as possible and as many sliding blades as possible.

[0139] 2) The gap between the blades should be as small as possible, less than the width of a single blade.

[0140] 3) When the gap between the blades is greater than the width of a single blade, flip down one more blade and add another blade.

[0141] Each blade includes a rotating hole 351, a positioning hole 352, a blade locking hook 353, a locking hole 354, and a blade clearance groove 355. The locking hole 354 and the blade clearance groove 355 are optional and can be configured as needed.

[0142] The aforementioned rotating hole, positioning hole, and locking hole are preferably closed circular holes as shown in the figure. Based on the technical principle of this case, open slots are used. Holes or slots of other shapes that achieve the same function are considered equivalent.

[0143] The aforementioned blade locking hook can cooperate with the connecting block to achieve the blade hanging as shown in Figure 10(a); the blade clearance groove is shown in Figure 5(e), which can avoid the blade guide protrusion when the blade holder is provided with a blade guide protrusion.

[0144] The tool selection mechanism includes a connecting plate 321, a moving frame 322, a positioning pin 323, and a tool selection drive device 324.

[0145] The aforementioned connecting plate is fixedly connected to the tool holder or integrated into it. The tool selection drive device is preferably, but not limited to, a gear and rack transmission mechanism, which drives the moving frame to move left and right in the X direction.

[0146] The positioning pin is mounted on the movable frame and can move synchronously in the X direction with the movable frame. During the X-axis movement, the positioning pin engages with the positioning holes 352 of different blades to position the blades with the blade tip pointing upwards, preventing them from freely flipping downwards under their own weight.

[0147] The blade rotation mechanism includes a blade rotation shaft 331, a rotation pin 332, and a blade rotation drive device 333.

[0148] The blade rotating shaft is horizontally arranged, with one end connected to the bottom of the moving frame, enabling synchronous lateral movement of the moving frame and the rotating shaft. The other end is movably connected to the bottom of the blade holder. All the blades mentioned above are mounted in the middle of the blade rotating shaft.

[0149] A rotating pin is arranged parallel to the blade's rotating shaft and connected to its free end. It rotates synchronously with the shaft and engages with the blade's rotating hole, thus driving the blade to rotate and flip under the influence of the blade rotation drive. The blade rotation drive is preferably, but not limited to, a synchronous belt drive.

[0150] During operation, the tool selection drive device 324 drives the moving frame to move, and the positioning pin set on the moving frame moves at the same time. Meanwhile, the blade rotating shaft and the rotating pin also move synchronously with the moving frame.

[0151] During blade selection, the blade rotation shaft and rotating pin rotate, flipping all blades with downward-pointing tips upward and aligning them. At this time, the moving frame moves in the X direction, causing the positioning pin and rotating pin (indirectly driven via the blade rotation shaft) to move laterally in the X direction. The positioning pin inserts into the positioning hole on the blade with upward-pointing tips, and the rotating pin inserts into the rotating hole on the blade with upward-pointing tips. With the lateral movement of the moving frame, the blade selection operation is completed. After blade selection, the blade rotation drive device preferably drives the selected blade to rotate via a synchronous belt drive, causing the blade tip to point downward, completing the blade selection operation.

[0152] After the selection is complete, the blade holder moves away from the blade tip in the Z-direction, completing the blade hanging action as shown in Figure 10(a). Before the next blade selection, the blade holder moves towards the blade tip in the Z-direction, that is, to the right in the view of Figure 10, and the blade unlocks from the connecting block, as shown in Figure 10(b). At this time, the blade is disengaged, and the blade can rotate for blade selection. The rotation state of the blade after unlocking is shown in Figure 10(c).

[0153] The gap distribution mechanism includes a gap distribution plate 341 and a gap adjustment drive device 342.

[0154] The gap distribution plate is slidably mounted on the blade hanging mechanism, preferably on the support seat inside the blade holder, but it can also be mounted on the blade holder, etc., all of which are considered equivalent.

[0155] Each of the two evenly spaced plates facing the opening and closing blade assembly is connected to or integrated with a fork from the X-direction opening and closing mechanism, and the bottom of each fork is connected to the corresponding side blade.

[0156] The gap adjustment drive device can drive the gap distribution plate to slide along the X direction, thereby synchronously driving the shift fork and the side blade to slide along the X direction, thus adjusting the gap between the blade and the side blade.

[0157] Alternatively, the aforementioned shift fork can be directly connected to the support base or tool holder of the tool hanging mechanism, or to other structures except for the evenly distributed gap plate, or to components such as a slide that moves in the X direction. In this case, the gap between the blade and the side blade cannot be adjusted, but the opening and closing movement of the side blade can still be driven.

[0158] The aforementioned locking hole 354 can lock the blade position with the blade tip pointing upwards, preventing the blade from falling off and going out of control when the blade rotation axis slides to avoid it.

[0159] As shown in Figure 1, each set of slide cutter assemblies includes several slide cutters 41.

[0160] Each slide cutter is slidably connected to the connecting block at its top and can slide along the length of the connecting block under the drive of the corresponding slide cutter drive mechanism 42.

[0161] As shown in Figure 5(d), each slide cutter is provided with a slide cutter clearance groove 412 that mates with the center cutter guide protrusion 211, which can avoid the center cutter guide protrusion provided on the center cutter holder. The slide cutter clearance groove is an optional setting. It is set when the center cutter holder is provided with the center cutter guide protrusion. In addition, it is only set on the slide cutter on the side closest to the center cutter, and other slide cutters do not need to be set.

[0162] In this embodiment, the connecting block and the top surface of each slide blade are preferably in a dovetail structure. Based on the technical principle of this application, the preferred but not limited to the one shown in Figure 23 is to change the shape of the mating surface, which is considered equivalent and is within the protection scope of this application.

[0163] The slide drive mechanism is existing technology, and preferably includes a drag bar 421 and an X-axis sliding drive device 422.

[0164] The drag bar is adapted to the connecting block and can slide laterally in the X direction. The X-axis sliding drive device, preferably an X-axis sliding motor, drives the drag bar via a synchronous belt and a lead screw. The drag bar preferably has several grooves that mate with the drag plungers on the top of the slide cutters. The drag plungers are preferably pneumatic; after being lifted, they engage in the corresponding grooves on the drag bar. When the drag bar moves, it carries the selected N slide cutters. Furthermore, the slide cutter closest to the blade is preferably fixedly connected to the drag bar.

[0165] Alternatively, the aforementioned X-axis sliding drive device can also employ common drives such as rack and pinion drives, which are considered equivalent. Alternatively, based on the technical principles and rights protection of this case, the X-axis sliding drive device is manually adjusted, employing a completely manual mold-changing and tool-assembly method, which is considered equivalent. For example, when manually changing tools, only the sliding tool is used, removing the opening and closing tool assembly and the tool magazine assembly, which is also within the scope of this application.

[0166] As shown in Figures 2 and 3, each slide cutter includes a mold body 411, a fine-tuning mechanism 50, and a clamping mechanism 60.

[0167] The fine-tuning mechanism is located on the side of the mold body near the blade tip and is adapted to the front end of the connecting block; the fine-tuning mechanism can adjust the horizontal position of the blade tip and the connecting block in the mold body.

[0168] For the fine-tuning mechanism, this application provides the following five preferred embodiments.

[0169] Example 1

[0170] As shown in Figure 11, the fine-tuning mechanism preferably includes an adjusting block 51 and an adjusting element. The adjusting block is separately disposed from the mold body. The top of the adjusting block is provided with a bearing and positioning surface 511 that can cooperate with the connecting block. The middle or upper middle part (preferably the middle part) of the adjusting block located below the bearing and positioning surface is preferably hinged to the mold body by a rotating pin 53. In Figures 11(a) and (b), the adjusting block and the rotating pin are preferably hinged in the middle. However, as shown in Figure 11(c), the principle is the same when the hinge point of the adjusting block and the rotating pin is located at the bottom, and it is obvious that they are considered equivalent.

[0171] The aforementioned adjusting elements adjust the adjusting block to form a lever structure with the movable connection point (hinge point) as the rotation fulcrum, thereby adjusting the position of the bearing positioning surface and thus realizing the adjustment of the horizontal position of the blade tip in the mold body.

[0172] In this embodiment, the adjusting element is preferably the adjusting screw 52. Based on the technical principle of this invention, mechanisms such as conical surfaces, pins, cams, eccentric wheels, or grooved wheels are used to adjust the adjusting block, and all are considered equivalent. In Figure 11, the adjusting screw passes through the mold body. The advantage is that the adjusting screw is located on the side that is easy for the operator to adjust, making adjustment convenient.

[0173] In this embodiment, the adjusting screw is threadedly connected to the mold body, and the adjusting screw rests on the lower part of the adjusting block. By rotating the adjusting screw, the angle of the adjusting block relative to the mold body is adjusted, thereby indirectly adjusting the horizontal position of the cutting tip in the mold body. The adjustment of the position and connection method of the adjusting screw, based on the same principle, is considered equivalent in this case.

[0174] This embodiment 1 has suitable processing difficulty and cost, is easy to adjust, and allows for a large adjustment range. However, its load-bearing capacity is moderate, making it suitable for high-precision applications.

[0175] Example 2

[0176] As shown in Figure 12, the fine-tuning mechanism preferably includes an adjusting block 51 and an adjusting screw 52. The adjusting block is integral with the mold body, and the top of the adjusting block is provided with a bearing positioning surface 511 that can cooperate with the connecting block. The middle or upper part of the adjusting block located below the bearing positioning surface has an integrally formed flexible connection point with the mold body. The adjusting block below the flexible connection point has a stress relief groove 54 between it and the mold body, and the bottom of the stress relief groove is open.

[0177] Referring to Figure 11(c) in Embodiment 1, the principle is the same when the flexible connection point is set at the bottom, and they are considered equivalent.

[0178] The aforementioned adjustment element adjusts the adjustment block to form a lever structure with the movable connection point (flexible connection point) as the rotation fulcrum, thereby adjusting the position of the bearing positioning surface and thus realizing the adjustment of the horizontal position of the blade tip in the mold body.

[0179] In this embodiment, the adjusting element is preferably the adjusting screw 52, ​​and the adjustment method is the same as in embodiment 1, so it will not be described again.

[0180] When the adjusting screw is adjusted, the stiffness at the flexible connection point weakens due to the stress relief groove, thus enabling adjustment. The function of the adjusting screw is to achieve "pull" and "pull" actions. The number and position of the adjusting screws are preferably, but not limited to, those shown in Figure 12. Other numbers of screws and arrangements are considered equivalent based on the principles of this invention.

[0181] This embodiment has the lowest processing and manufacturing difficulty and cost, but the adjustment is small, yet it has strong load-bearing capacity, making it especially suitable for heavy-duty applications.

[0182] Example 3

[0183] As shown in Figures 14 and 15, the fine-tuning mechanism includes an adjusting screw 52.

[0184] The top of the mold body is provided with a load-bearing positioning protrusion 512.

[0185] The adjusting screw engages with the threaded pair of the bearing positioning protrusion, and the end of the adjusting screw passes through the bearing positioning protrusion and engages directly or indirectly with the connecting block; by rotating the adjusting screw, the horizontal position accuracy of the cutting tip in the mold body can be adjusted.

[0186] In Figure 14, the adjusting screw has no shims, while in Figure 15, the adjusting screw has shims; these are considered equivalent. This configuration has low manufacturing cost and high load-bearing capacity; its disadvantage is slightly less ease of adjustment.

[0187] Example 4

[0188] As shown in Figure 16, the adjusting block and the mold body are slidably separated. The adjusting block can cooperate with the sliding pair of the mold body under the drive of the adjusting element. In this embodiment, it is preferred to slide laterally to adjust the position of the bearing positioning surface, thereby adjusting the position of the blade tip in the horizontal direction in the mold body.

[0189] At this time, the adjusting block slides laterally with the mold body through the laterally arranged guide 57; at this time, the adjusting screw is threadedly connected to the adjusting block, and by rotating the adjusting screw, the horizontal position of the cutting tip in the mold body can be indirectly adjusted.

[0190] The aforementioned guide component is circular or square in shape; other shapes such as elliptical are considered equivalent based on the principles of this case. The guide component is fixedly connected to or integrated with one of the mold body or adjusting block, and movably connected to another part.

[0191] Adjustment is made by adjusting the screws in the "pull" and "adjust" positions as shown in Figure 16. The number and arrangement of screws are preferred but not limited to those shown in the figure; other numbers and arrangements of screws are considered equivalent based on the principles of this case.

[0192] In Figures 16(a) to (c), there are two types of adjusting screws: one that "pulls" and the other that "pulls". Alternatively, the adjusting screw can be provided with only one type, that is, only the threaded pair is connected, as shown in Figure 16(d).

[0193] This embodiment is easy to manufacture, low in cost, and has a strong load-bearing capacity, making it suitable for heavy-duty applications. However, this embodiment requires adjusting the "pull" and "tighten" actions of the screws, which makes the adjustment slightly inconvenient.

[0194] Example 5

[0195] As shown in Figure 17, the adjusting block and the mold body are slidably separated. The adjusting block can cooperate with the sliding pair of the mold body under the drive of the adjusting element. In this embodiment, vertical sliding is preferred to realize the adjustment of the position of the bearing positioning surface, thereby realizing the adjustment of the horizontal position of the blade tip in the mold body.

[0196] At this time, the adjusting screw is threadedly connected to the mold body, and the end of the adjusting screw is provided with a height adjusting cone surface 521; by rotating the adjusting screw, the height of the adjusting block is raised or lowered, thereby indirectly adjusting the horizontal position of the blade tip in the mold body.

[0197] Furthermore, a height groove and a return spring 58 are provided in the mold body; the height groove can guide the height sliding of the adjusting block, the adjusting block is pushed upward under the action of the return spring, the height adjusting cone surface of the adjusting screw is adapted to the inclined surface under the adjusting block, and the vertical adjustment of the adjusting block is achieved by "screwing in" and "screwing out" of the adjusting screw, thereby achieving the purpose of adjusting the mold accuracy.

[0198] In Figures 17(a) to (d), the adjusting screws are arranged horizontally. Alternatively, the adjusting screws can also be arranged with vertical thread pairs as shown in Figure 17(e), which are considered equivalent.

[0199] The manufacturing cost and processing difficulty of this embodiment are suitable. It has strong load-bearing capacity, is easy to adjust, and has high adjustment accuracy, making it suitable for high-precision and heavy-duty applications.

[0200] Because the fine-tuning mechanism in each slide cutter is a movable connection mechanism, its structural stiffness characteristics differ from those of the integrated mold. Even within an automatic die-assembly device, the mold structures vary, necessitating matching of the mold body's stiffness. Otherwise, under the same load, different mold stiffness characteristics will inevitably lead to varying mold deformation, ultimately resulting in deviations in bending processing accuracy. As shown in Figure 18, it is necessary to analyze the deformation of the mold body during load-bearing, and based on this analysis, optimize the material distribution and structural details to ultimately ensure the consistency of the entire mold's stiffness.

[0201] The clamping mechanism is located on the side opposite to the fine-tuning mechanism, and is used to press the mold body against the connecting block without gaps.

[0202] As shown in Figures 19 to 21, the clamping mechanism includes a clamping element and a clamping power element.

[0203] The clamping element has a clamping mating surface 611 that mates with the connecting block.

[0204] The clamping power element drives the clamping component to move, causing the clamping mating surface to press against the connecting block without gaps; wherein, the driving direction of the clamping power element is opposite to, the same as, or perpendicular to the clamping direction of the clamping component. Based on the principle of this case, setting an angle is considered equivalent and is also within the scope of protection.

[0205] Regarding the clamping mechanism, this application provides the following three preferred embodiments.

[0206] Example 1

[0207] As shown in Figure 19, the clamping component is a clamping arm, and the clamping mating surface is located at the top of the clamping arm. The clamping arm is hinged to the mold body.

[0208] The clamping power element drives the clamping arm in the opposite direction to the clamping direction of the clamping arm.

[0209] The clamping power element is either a direct drive assembly for the clamping arm or an indirect drive assembly for the clamping arm.

[0210] The aforementioned clamping arm direct drive assembly preferably includes multiple methods such as spring 63, pneumatic, hydraulic, electromagnetic, or manual actuation.

[0211] The aforementioned indirect drive assembly for the clamping arm preferably includes a plunger 62 and a plunger telescopic drive mechanism; the plunger telescopic drive mechanism preferably includes multiple methods such as spring 63, pneumatic, hydraulic, electromagnetic, or manual actuation.

[0212] As shown in Figure 19(b), when the plunger is driven by a spring, the structure is simple and the cost is low. However, the clamping force is always present, and the resistance is relatively large when sliding and dragging.

[0213] As shown in Figure 19(c), when the plunger is driven by a controllable method such as pneumatic, hydraulic, or electromagnetic pressure, the cost is high and the structure is complex, but it can avoid generating clamping force during dragging, with small sliding dragging force and high speed.

[0214] Figure 19(d) shows a schematic diagram of the clamping arm direct drive assembly using a spring.

[0215] In addition, in 19(a) to (d), the hinge point is located in the middle or upper middle part of the clamping block. Alternatively, the hinge point is also located in the lower part of the clamping block, as shown in Figure 19(e).

[0216] This embodiment features high clamping force and is safe and reliable. It is suitable for applications requiring high precision, heavy loads, and frequent operation.

[0217] Example 2

[0218] The clamping element is either the clamping block shown in Figure 20 or the plunger shown in Figure 21.

[0219] The clamping component and the top of the mold body on the opposite side of the fine-tuning mechanism form a sliding pair, and the inner side of the clamping component is provided with a clamping mating surface.

[0220] The driving direction of the clamping power element on the clamping part is the same as the clamping direction of the clamping part.

[0221] A. The clamping component is a clamping block.

[0222] The clamping block is preferably set in the transverse sliding groove of the mold body, and the inner side is provided with a clamping mating surface that cooperates with the connecting block.

[0223] The clamping power element includes a lateral sliding drive mechanism 642, which can drive the lateral sliding clamping member to slide laterally, so that the clamping mating surface of the clamping block can be pressed against the connecting block.

[0224] Furthermore, the clamping mechanism preferably adopts, but is not limited to, a lateral sliding guide pin 641, which can guide the lateral sliding of the clamping block.

[0225] In this embodiment, the lateral sliding drive mechanism preferably uses a spring (preferably a disc spring) to press the clamping block. This method is simple in structure and low in cost, but the disadvantage is that the clamping force is always present. It also has a large drag load and may experience wear and heat generation with long-term use. Therefore, it is suitable for scenarios where high precision requirements are not necessary and operation is infrequent.

[0226] B. The clamping element is a plunger.

[0227] The plunger is preferably disposed in the transverse sliding groove, and its inner side is provided with a pressing mating surface that cooperates with the connecting block.

[0228] The clamping power element includes a lateral sliding drive mechanism 642, which drives the plunger to slide laterally, so that the clamping mating surface of the plunger presses against the connecting block.

[0229] The lateral sliding drive mechanism can be a spring as shown in Figure 21(b), or a controllable actuation method such as pneumatic, hydraulic, or electromagnetic as shown in Figure 21(c).

[0230] This embodiment features a simple structure and is easy to manufacture. Its disadvantage is a slightly lower clamping force. It is suitable for applications with low loads.

[0231] Example 3

[0232] As shown in Figure 22, the clamping component is a horizontally arranged clamping block 66.

[0233] One side of the clamping block is provided with a clamping mating surface, and the other side of the clamping block is provided with a driving inclined surface.

[0234] The clamping power element is engaged with the driving inclined sliding pair, and the driving direction of the clamping power element on the clamping part is perpendicular to the clamping direction of the clamping part.

[0235] The preferred clamping power element is plunger 661, which can be driven by a controllable pneumatic or electric method as shown in Figure 22(a) and (b), or by a clamping spring 662 as shown in Figure 22(c) and (d).

[0236] When the clamping power elements are arranged vertically, it is preferred, but not limited to, that the clamping power elements are arranged in a single group from top to bottom; when the clamping power elements are arranged horizontally, it is preferred, but not limited to, that two groups are arranged symmetrically.

[0237] As an alternative, the clamping mechanism preferably, but not limited to, the locking mechanism shown in Figure 24, employs a manually rotated screw, a clamping linkage mechanism, a cam, or other locking mechanism to achieve manual clamping, which is also considered equivalent. In Figure 24(a), the screw directly clamps the mold body onto the connecting block without gap; in Figure 24(b), the screw and the mold body are threaded together, and locking is achieved by "pushing" the plunger, specifically: manually rotating the screw pushes the plunger, causing it to clamp onto the connecting block without gap; in Figure 24(c), the pressure arm is hinged to the mold body, forming a lever structure, and the top of the pressure arm is clamped onto the connecting block by manually rotating the screw; in Figure 24(d), the screw and the mold body are threaded together, and locking is achieved by "pushing" the clamping block, specifically: manually rotating the screw pushes the clamping block, causing it to clamp onto the connecting block without gap.

[0238] Based on the technical principles of this case, adding elastic elements such as springs, disc springs, rubber, and polyurethane to the clamping mechanism is considered equivalent.

[0239] The present invention can achieve the following preferred effects.

[0240] 1. The industrialization of automatic blade assembly devices solves the industry's pain points and plays a decisive role in promoting the transformation of the metal sheet manufacturing industry from traditional single-machine manufacturing to intelligent manufacturing.

[0241] 2. Due to its adjustable precision, this invention significantly improves industry precision standards. Currently, industry precision is generally ±0.75 degrees, with poor straightness. Based on this invention, the machining precision can reach at least ±0.3 degrees. This precision far exceeds existing industry standards and even surpasses the highest international machining precision levels. Higher machining precision means:

[0242] a) It can be used in various industries and scenarios with high precision requirements, such as communications, electrical cabinets, electronics and other high-end and high-value-added industries.

[0243] b) For high-precision bent workpieces, the next welding process can be automated, which helps to improve the intelligence of the next process.

[0244] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A bending center blade assembly device, characterized in that: The device includes a sliding blade assembly; a slider with a height adjustable at the bending center, and a connecting block arranged along the length of the slider's bottom; the sliding blade assembly includes several sliding blades, each of which is movably connected to the connecting block at its top; each sliding blade includes a mold body, a fine-tuning mechanism, and a clamping mechanism; the fine-tuning mechanism is located on the side of the mold body near the blade tip and is adapted to the front end of the connecting block; the fine-tuning mechanism can adjust the horizontal position of the blade tip in the mold body; the clamping mechanism is located on the side opposite to the fine-tuning mechanism and is used to press the mold body against the connecting block without gaps.

2. The bending center blade assembly device according to claim 1, characterized in that: The fine-tuning mechanism includes an adjusting block and an adjusting element; the adjusting block is integrated with or separate from the mold body, and the top of the adjusting block is provided with a bearing and positioning surface that can cooperate with the connecting block; the adjusting element can adjust the position of the cutting tip in the horizontal direction in the mold body.

3. The bending center blade assembly device according to claim 2, characterized in that: The adjusting block located below the bearing positioning surface is integrally or separately connected to the mold body to form a movable connection point; the adjusting element adjusts the adjusting block to form a lever structure with the movable connection point as the rotation fulcrum, thereby adjusting the position of the bearing positioning surface, and thus realizing the adjustment of the horizontal position of the cutting tip in the mold body.

4. The bending center blade assembly device according to claim 3, characterized in that: The adjusting block is set separately from the mold body. The middle or upper part of the adjusting block located below the bearing positioning surface is hinged to the mold body, and the hinge point is the rotation fulcrum.

5. The bending center blade assembly device according to claim 3, characterized in that: The adjusting block is integrally set with the mold body. The middle or upper part of the adjusting block located below the bearing positioning surface has an integrally set flexible connection point with the mold body. There is a stress relief groove between the adjusting block and the mold body below the flexible connection point. The flexible connection point is a rotation fulcrum.

6. The bending center blade assembly device according to claim 2, characterized in that: The adjusting block is slidably separated from the mold body. Driven by the adjusting element, the adjusting block can cooperate with the sliding pair of the mold body to adjust the position of the bearing positioning surface, thereby adjusting the horizontal position of the cutting tip in the mold body.

7. The bending center blade assembly device according to claim 6, characterized in that: The adjusting block and the mold body are fitted with a lateral sliding pair; during the lateral sliding process, the guide is provided by the laterally set guide.

8. The bending center blade assembly device according to claim 6, characterized in that: The adjusting block and the mold body are fitted with a vertical sliding pair; the adjusting element drives the vertical sliding of the adjusting block through a tapered surface fit.

9. The bending center cutting device according to any one of claims 2 to 8, characterized in that: The adjustment element is an adjustment screw, which engages with the threaded pair of the adjustment block or the mold body. By rotating the adjustment screw, the horizontal position accuracy of the cutting tip in the mold body can be adjusted.

10. The bending center blade assembly device according to claim 1, characterized in that: The fine-tuning mechanism includes an adjusting screw; a bearing positioning protrusion is provided on the top of the mold body; the adjusting screw is threaded with the bearing positioning protrusion, and the end of the adjusting screw passes through the bearing positioning protrusion and is directly or indirectly engaged with the connecting block; by rotating the adjusting screw, the horizontal position accuracy of the cutting tip in the mold body can be adjusted.

11. The bending center blade assembly device according to claim 1, characterized in that: The clamping mechanism includes a clamping component and a clamping power element; the clamping component has a clamping mating surface that mates with the connecting block; the clamping power element drives the clamping component to move, so that the clamping mating surface is pressed against the connecting block without gap; wherein, the driving direction of the clamping power element is opposite to, the same as, or perpendicular to the clamping direction of the clamping component.

12. The bending center blade assembly device according to claim 11, characterized in that: The clamping component is a clamping arm, with the clamping mating surface located at the top of the clamping arm. The clamping arm is hinged to the mold body. The clamping power element drives the clamping arm in the opposite direction to the clamping direction of the clamping arm.

13. The bending center blade assembly device according to claim 12, characterized in that: The clamping power element is either a direct drive assembly or an indirect drive assembly for the clamping arm; wherein, the direct drive assembly for the clamping arm includes a spring, pneumatic, electric or manual; the indirect drive assembly for the clamping arm includes a plunger and a plunger telescopic drive mechanism; the plunger telescopic drive mechanism includes a spring, pneumatic, electric or manual.

14. The bending center blade assembly device according to claim 11, characterized in that: The clamping element is a clamping block or a plunger; the clamping mating surface is provided on the inner side of the clamping element; the driving direction of the clamping power element on the clamping element is the same as the clamping direction of the clamping element.

15. The bending center blade assembly device according to claim 11, characterized in that: The clamping element is a horizontally arranged clamping block; one side of the clamping block is provided with the clamping mating surface, and the other side of the clamping block is provided with a driving inclined surface; the clamping power element is slidably matched with the driving inclined surface, and the driving direction of the clamping power element on the clamping element is perpendicular to the clamping direction of the clamping element.

16. A bending center blade assembly device, characterized in that: It includes an opening and closing central blade assembly located in the middle of the connecting block; the opening and closing central blade assembly includes a central blade holder, a vertical blade, a vertical blade lifting mechanism, two side blades, and an X-axis opening and closing mechanism; the central blade holder is mounted on the connecting block; the vertical blade and the central blade holder are in sliding engagement in the vertical Y direction, and can actively slide along the central blade holder in the vertical Y direction under the drive of the vertical blade lifting mechanism; the two side blades are symmetrically arranged at the bottom of the central blade holder on both sides of the vertical blade, and each side blade can perform opening and closing movements along the X-axis of the connecting block length under the drive of the X-axis opening and closing mechanism.

17. The bending center blade assembly device according to claim 16, characterized in that: The center knife holder has center knife guide protrusions on both sides.

18. The bending center blade assembly device according to claim 16, characterized in that: The vertical cutter lifting mechanism includes a lifting rod, a lifting drive device, and a locking plunger; the lifting drive device is connected to the vertical cutter through the lifting rod, thereby driving the vertical cutter to slide vertically in the Y direction along the central cutter holder; the locking plunger is used to lock the lifting rod.

19. The bending center blade assembly device according to claim 16, 17, or 18, characterized in that: It also includes two sets of blade magazine assemblies; one set of the blade magazine assemblies is set on each side of the blade assembly during opening and closing; each set of blade magazine assemblies includes a blade hanging mechanism and several blades; the blade hanging mechanism includes a blade holder, a support base and a Z-axis drive mechanism; the support base is set on the outer side of the slider; the upper part of the blade holder is slidably connected to the support base in the Z-axis direction, and all blades are movably mounted on the lower part of the blade holder; each blade can rotate; the Z-axis drive mechanism can drive the blade holder to reciprocate along the Z-axis perpendicular to the slider to realize the blade removal or hanging action.

20. The bending center blade assembly device according to claim 19, characterized in that: Each blade magazine assembly also includes a gap distribution mechanism; the gap distribution mechanism includes a gap distribution plate and a gap adjustment drive device; the gap distribution plate is slidably mounted on the blade hanging mechanism; the X-direction opening and closing mechanism includes two shift forks and two sets of shift fork X-direction opening and closing drive devices; the two shift forks are arranged on the two gap distribution plates or the two blade hanging mechanisms other than the gap distribution plates; the bottom of each shift fork is connected to the corresponding side blade; the X-direction opening and closing drive device can drive the corresponding blade magazine assembly to slide along the X direction, thereby synchronously driving the corresponding shift fork and side blade to slide along the X direction, realizing the opening and closing movement of the two side blades; the gap adjustment drive device can drive the gap distribution plate to slide along the X direction.

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