Hydraulic plate bending equipment

Abstract

The invention relates to the technical field of bending processing equipment, and discloses hydraulic plate bending equipment which comprises a bending device, the bending device comprises a bending machine body, a lower die and the bending device are installed in the bending machine body, the bending device comprises an upper fixing plate, the bottom of the upper fixing plate is rotatably connected with an upper fixing shaft, and the upper fixing shaft is rotatably connected with a lower die. An upper rotating plate is rotationally connected to the side wall of the upper fixing shaft, a first middle connecting plate is installed at the bottom of the upper rotating plate, a middle fixing shaft is installed at the bottom of the first middle connecting plate, a second middle connecting plate is rotationally connected to the outer side wall of the middle fixing shaft, and a lower rotating plate is installed at the bottom of the second middle connecting plate; and the bottom of the lower rotating plate is rotationally connected with a lower fixing shaft, the outer side wall of the lower fixing shaft is rotationally connected with a lower bending mold plate, and the scheme has the beneficial effects that the placing angle of the bending upper mold is adjusted in the bending machining process, and bending of a plate is prevented from being affected; the problem that the bending process is limited due to the fact that a bent plate is possibly shielded by the upper die is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bending processing equipment, in particular to a hydraulic sheet metal bending equipment. Background Art

[0002] Bending equipment is a metal processing machine that is mainly used to plastically deform metal sheets, metal strips, metal tubes or other metal profiles through pressure to form specific angles and shapes. The working principle of the bending machine mainly relies on the mold to apply pressure to the metal sheet, so that it undergoes plastic deformation and reaches a predetermined bending angle. Specifically, the operation process includes the steps of clamping the sheet, setting parameters, starting the machine, applying pressure and completing the bending.

[0003] Using bending equipment to process sheet metal can efficiently and accurately achieve the transformation of the angle and shape of sheet metal, meet the diverse product design requirements, improve production efficiency, reduce labor costs, and ensure the consistency and stability of processing quality. It is an indispensable and important process in the field of metal processing. In short, the bending equipment processes sheet metal, realizes efficient and accurate forming, reduces costs, and ensures quality.

[0004] The bending equipment in the prior art usually opens a groove in the plate before bending, and then places the groove of the plate on the lower mold, and presses downward through the upper mold to bend the groove of the plate at the angle of the lower mold. However, for some workpieces that need to be bent into a U-shape, the bent part of the upper mold may conflict with the side wall of the upper mold during the up and down movement of the upper mold, resulting in the workpiece cannot be bent directly, or the workpiece cannot be bent directly to the required angle; therefore, it does not meet the existing needs, and we have proposed a hydraulic sheet metal bending equipment. Summary of the invention

[0005] The present invention provides a hydraulic sheet metal bending device, which has the beneficial effect of adjusting the placement angle of the bending upper mold during the bending process to prevent the bending of the plate from being affected, and solves the problem mentioned in the above background technology that the bent plate may be blocked by the upper mold, resulting in the bending process being restricted.

[0006] The present invention provides the following technical solution: a hydraulic sheet metal bending equipment, comprising a bending device, the bending device comprising a bending machine body, a lower mounting block and an upper mounting block are installed on the inner wall of the bending machine body, a lower mold is installed in the lower mounting block, and the bending device is installed in the upper mounting block.

[0007] The bending device includes an upper fixed plate installed in the upper mounting block, the bottom of the upper fixed plate is rotatably connected to the upper fixed shaft, the side wall of the upper fixed shaft is rotatably connected to the upper rotating plate, the bottom of the upper rotating plate is installed with a middle connecting plate No. 1, the bottom of the middle connecting plate No. 1 is installed with a middle fixed shaft, the outer side wall of the middle fixed shaft is rotatably connected to the middle connecting plate No. 2, the bottom of the middle connecting plate is installed with a lower rotating plate, the bottom of the lower rotating plate is rotatably connected to the lower fixed shaft, and the outer side wall of the lower fixed shaft is rotatably connected to the lower bending mold plate.

[0008] As an optional solution of the hydraulic sheet metal bending equipment described in the present invention, the upper rotating plate and the middle No. 2 connecting plate are provided with telescopic grooves at the bottom, telescopic blocks are inserted into the telescopic grooves, the bottoms of the telescopic blocks are fixedly connected to the tops of the middle No. 1 connecting plate and the tops of the lower rotating plate, and the middle No. 1 connecting plate and the middle No. 2 connecting plate are composed of a rectangular plate and a plurality of connecting rings.

[0009] As an optional scheme of the hydraulic sheet metal bending equipment described in the present invention, wherein: a plug-in fixing component is arranged in the middle fixed shaft, the plug-in fixing component includes a movable groove opened in the middle fixed shaft, a movable plate is slidably connected in the movable groove, a plug-in fixing plate is fixedly connected to one side of the movable plate, the plug-in fixing plate is slidably connected in the placement slide groove, the placement slide groove is opened on the side wall of the middle fixed shaft, the other end of the plug-in fixing plate is plugged in the plug-in fixing groove, the plug-in fixing groove is opened at one end of the middle No. 1 connecting plate and the middle No. 2 connecting plate, and a No. 1 spring is fixedly connected to the side of the movable plate away from the plug-in fixing plate.

[0010] As an optional scheme of the hydraulic sheet metal bending equipment described in the present invention, there are stretching drive components at both ends of the movable plate, and the stretching drive components include a fixed shaft fixedly connected in the movable groove, the outer wall of the fixed shaft is rotatably connected to a swing plate, the fixed shaft and the swing plate are connected by a torsion spring, the end of the swing plate away from the movable plate is fixedly connected to an end shaft, the side wall of the end shaft is rotatably connected to a stretching rod, the stretching rod is slidably connected in the installation groove, the installation groove is opened at both ends of the middle fixed shaft, the end of the swing plate away from the end shaft is in contact with a resistance plate, and the resistance plate is fixedly connected to both ends of the movable plate.

[0011] As an optional scheme of the hydraulic sheet metal bending equipment described in the present invention, wherein: limiting components are arranged at both ends of the middle fixed shaft, the limiting components include a cross plate, the side wall of the cross plate is fixedly connected to a mounting rod, the other end of the mounting rod is fixedly connected to the main body of the bending machine, the upper and lower ends of the cross plate are fixedly connected to the upper fixed shaft and the lower fixed shaft, an intermediate sliding groove is opened in the cross plate, a rectangular fixed block is slidably connected in the intermediate sliding groove, the side wall of the rectangular fixed block is fixedly connected to the middle fixed shaft, the side wall of the rectangular fixed block is opened with a T-shaped rotating groove, a T-shaped rotating rod is rotatably connected in the T-shaped rotating groove, and the bottom of the plug-in rod is triangular in design.

[0012] As an optional solution for the hydraulic sheet metal bending equipment described in the present invention, the side wall of the plug-in rod is fixedly connected with a reset plate, the reset plate is slidably connected in the reset groove, the bottom of the reset plate is fixedly connected with a reset spring, the other end of the reset spring is fixedly connected to the bottom of the reset groove, and the reset groove is opened in the rectangular fixed block.

[0013] As an optional solution of the hydraulic sheet metal bending equipment described in the present invention, several groups of lubrication components are arranged in the middle fixed shaft, and the lubrication components include a lubrication bin fixedly connected to the middle fixed shaft, a bellows is fixedly connected to the bottom of the lubrication bin, a bottom plate is fixedly connected to the bottom of the bellows, a piston plate is slidably connected in the lubrication bin, a back plate is fixedly connected to the bottom of the piston plate, the other end of the back plate is arranged outside the lubrication bin, the upper end of the piston plate is fixedly connected to a piston spring, and the other end of the piston spring is installed in the lubrication bin.

[0014] As an optional solution of the hydraulic sheet metal bending equipment described in the present invention, a one-way output channel is opened in the middle fixed shaft, and a sponge is arranged in the one-way output channel.

[0015] As an optional solution of the hydraulic sheet metal bending equipment described in the present invention, several of the lubrication bins are connected by connecting pipes, and one side of the outermost lubrication bin is connected to a one-way input pipe.

[0016] The present invention has the following beneficial effects: 1. In the hydraulic sheet metal bending equipment, the bending device is connected by three fixed shafts and several rotating plates, so that when the bending process is carried out, if the bent workpiece affects the subsequent bending process, the position of the middle fixed shaft can be stretched to form a movable space in the middle of the bending device. At this time, the bent part of the workpiece can be placed in the space formed after the bending. In the bending process, the bending device does not need to be displaced in a large range. Therefore, the space formed by the bending device after the bending can effectively avoid the subsequent inability to directly carry out the bending process due to the mutual conflict between the bent part of the workpiece and the upper mold. However, the lifting and lowering of the bending device is controlled by the program, so the lifting and lowering distance of the bending device is usually fixed. Therefore, when changing the position of the middle fixed shaft, the height of the bottom of the lower bending mold plate from the top of the upper fixed plate cannot be affected. Therefore, through the design of the telescopic groove and the telescopic block, the relative position of the lower bending mold plate will not be changed when the middle fixed shaft changes its position.

[0017] 2. The design of the limit assembly of the hydraulic sheet metal bending equipment ensures the relative position of the lower bending die plate, while ensuring the stability of the middle fixed shaft when sliding, and improving the shear strength of the bending device when not bending. The opening of the middle slide groove and the connection between the rectangular fixed block and the middle fixed shaft improves the stability of the left and right sliding of the middle fixed shaft. When the middle fixed shaft needs to be fixed, the T-shaped rotating rod continues to rotate. At this time, due to the triangular design of the triangular slot and the bottom of the plug-in rod, the T-shaped rotating rod can push the plug-in rod to slide upward during the rotation process. At this time, the plug-in rod will be reinserted into the reinforced fixing groove, and the bottom of the plug-in rod will be resisted by the side wall of the T-shaped rotating rod, thereby effectively limiting the relative position of the rectangular fixed block, effectively preventing the middle fixed shaft from shaking, further improving the shear strength of the bending device, and further ensuring the stability of the bending device during the bending process.

[0018] 3. The hydraulic sheet metal bending equipment, through the sliding of the movable plate in the movable groove, one side of the movable plate contacts the contact plate, at this time the piston plate fixedly connected to the contact plate will slide upward in the lubrication bin, when the movable plate no longer contacts the contact plate, the piston plate slides downward under the action of the piston spring, and while the piston plate slides upward, the lubricating oil in the lubrication bin is supplied to the outside through the one-way output channel, since a sponge is provided in the one-way output channel, and the sponge is absorbent, each squeezing of the piston plate will transport the lubricating oil to the sponge, and during each sliding process of the middle fixed shaft, the outer wall of the middle fixed shaft will always contact and rub against the inner wall of the ring block of the middle No. 1 connecting plate and the middle No. 2 connecting plate, through this friction, the lubricating oil in the sponge can be effectively squeezed out, and through the continuous rotation of the middle fixed shaft and the middle No. 2 connecting plate and the middle No. 1 connecting plate, the lubricating oil is more evenly applied, thereby effectively avoiding the problem of embolism in the connection between the fixed shaft and the middle No. 1 connecting plate and the middle No. 2 connecting plate, thereby improving the stability of the bending process of the bending device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the local cross-sectional structure of the present invention. Figure 1 .

[0022] Figure 4 It is a schematic diagram of the local cross-sectional structure of the present invention. Figure 2 .

[0023] Figure 5 For the present invention Figure 3 Schematic diagram of the local structure.

[0024] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0025] Figure 7 It is a schematic diagram of the structure of the connection between the plug-in fixing assembly and the middle No. 2 connecting plate of the present invention.

[0026] Figure 8 For the present invention Figure 5 Enlarged structural diagram at B in the middle.

[0027] Fig. 9 It is a schematic diagram of the structure of the limiting component of the present invention.

[0028] Fig.10 It is a schematic diagram of the cross-sectional structure of the limiting component of the present invention.

[0029] Fig.11 For the present invention Fig.10 Enlarged structural diagram at D in the middle.

[0030] Fig.12 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0031] In the figure: 1. Bending device; 11. Bending machine body; 12. Lower mounting block; 13. Upper mounting block; 14. Lower mold; 2. Bending device; 21. Upper fixed plate; 22. Upper fixed shaft; 23. Upper rotating plate; 24. Middle No. 1 connecting plate; 25. Middle fixed shaft; 26. Middle No. 2 connecting plate; 27. Lower rotating plate; 28. Lower fixed shaft; 29. ​​Lower bending mold plate; 210. Telescopic slot; 211. Telescopic block; 3. Plug-in fixing assembly; 31. Movable slot; 32. Movable plate; 33. Placement slide; 34. Plug-in fixing plate; 35. Plug-in fixing slot; 36. No. 1 spring; 4. Tensile drive assembly; 41. Fixed shaft; 42. Swing plate; 43. Torsion spring ; 44. end shaft; 45. stretching rod; 46. installation groove; 47. contact plate; 5. limit assembly; 51. cross plate; 52. middle slide groove; 53. rectangular fixing block; 54. T-shaped rotating groove; 55. T-shaped rotating rod; 56. installation rod; 6. reinforced fixing assembly; 61. reinforced groove; 62. plug-in rod; 63. reset groove; 64. reset plate; 65. reset spring; 66. triangular slot; 67. reinforced fixing groove; 7. lubrication assembly; 71. lubrication bin; 72. bellows; 73. bottom plate; 74. piston plate; 75. contact plate; 76. one-way output channel; 77. sponge; 78. one-way input pipe; 79. connecting pipe; 710. piston spring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: This example is intended to help solve the problem that the bent plate may be blocked by the upper mold, resulting in a limited bending process. Figures 1 to 12 A hydraulic sheet metal bending device comprises a bending device 1, wherein the bending device 1 comprises a bending machine body 11, wherein a lower mounting block 12 and an upper mounting block 13 are installed on the inner wall of the bending machine body 11, wherein a lower mold 14 is installed in the lower mounting block 12, and a bending device 2 is installed in the upper mounting block 13.

[0034] The bending device 2 includes an upper fixed plate 21 installed in the upper mounting block 13, the bottom of the upper fixed plate 21 is rotatably connected to an upper fixed shaft 22, the side wall of the upper fixed shaft 22 is rotatably connected to an upper rotating plate 23, the bottom of the upper rotating plate 23 is installed with a middle connecting plate 24, the bottom of the middle connecting plate 24 is installed with a middle fixed shaft 25, the outer side wall of the middle fixed shaft 25 is rotatably connected to a middle connecting plate 26, the bottom of the middle connecting plate 26 is installed with a lower rotating plate 27, the bottom of the lower rotating plate 27 is rotatably connected to a lower fixed shaft 28, and the outer side wall of the lower fixed shaft 28 is rotatably connected to a lower bending mold plate 29.

[0035] A telescopic groove 210 is provided at the bottom of the upper rotating plate 23 and the middle second connecting plate 26, and a telescopic block 211 is inserted into the telescopic groove 210. The bottom of the telescopic block 211 is fixedly connected to the top of the middle first connecting plate 24 and the top of the lower rotating plate 27.

[0036] The bending machine body 11 serves as the main body of the bending machine and provides the main output power for the bending process. The bending device 2 is connected by three fixed shafts and several rotating plates, so that when the bending process is performed, if the bent workpiece affects the subsequent bending process, the position of the middle fixed shaft 25 can be stretched to allow the middle of the bending device 2 to have a movable space. At this time, the bent part of the workpiece can be placed in the space formed after the bending. In addition, since the bending device does not need to be displaced in a large range during the bending process, the space formed by the bending device after the bending can effectively avoid the subsequent inability to directly perform the bending process due to the mutual conflict between the bent part of the workpiece and the upper mold. (According to actual needs, several groups of No. 1 connecting plate 24, middle fixed shaft 25 and No. 2 middle connecting plate 26 can be designed. The more the above components are set, the stronger the flexibility. This scheme only designs one group for easy description).

[0037] However, the lifting and lowering of the bending device 2 is controlled by a program, so the lifting and lowering distance of the bending device 2 is usually fixed. Therefore, when the position of the middle fixed axis 25 is changed, the height of the bottom of the lower bending mold plate 29 from the top of the upper fixed plate 21 cannot be affected. Therefore, through the design of the telescopic groove 210 and the telescopic block 211, the middle fixed axis 25 will not change the relative position of the lower bending mold plate 29 when changing its position. At the same time, in order to further ensure the position of the lower bending mold plate 29, the relative position of the lower bending mold plate 29 is fixed through the installation connection of the cross plate 51. At the same time, the opening of the middle slide groove 52 ensures the sliding stability of the middle fixed axis 25.

[0038] A plug-in fixing component 3 is provided in the middle fixed shaft 25, and the plug-in fixing component 3 includes a movable groove 31 opened in the middle fixed shaft 25, a movable plate 32 is slidably connected in the movable groove 31, a plug-in fixing plate 34 is fixedly connected to one side of the movable plate 32, the plug-in fixing plate 34 is slidably connected in the placement slide groove 33, the placement slide groove 33 is opened on the side wall of the middle fixed shaft 25, the other end of the plug-in fixing plate 34 is plugged in the plug-in fixing groove 35, the plug-in fixing groove 35 is opened at one end of the middle No. 1 connecting plate 24 and the middle No. 2 connecting plate 26, and a No. 1 spring 36 is fixedly connected to the side of the movable plate 32 away from the plug-in fixing plate 34.

[0039] A stretching drive assembly 4 is provided at both ends of the movable plate 32, and the stretching drive assembly 4 includes a fixed shaft 41 fixedly connected in the movable groove 31, and the outer wall of the fixed shaft 41 is rotatably connected to the swing plate 42, and the fixed shaft 41 and the swing plate 42 are connected by a torsion spring 43, and the end of the swing plate 42 away from the movable plate 32 is fixedly connected to the end shaft 44, and the side wall of the end shaft 44 is rotatably connected to the stretching rod 45, and the stretching rod 45 is slidably connected in the installation groove 46, and the installation groove 46 is opened at both ends of the middle fixed shaft 25, and the end of the swing plate 42 away from the end shaft 44 is in contact with a contact plate 47, and the contact plate 47 is fixedly connected to both ends of the movable plate 32.

[0040] However, for plates that can rotate relative to each other, it is possible that after the bottom of the lower bending mold plate 29 contacts the workpiece, the bending device 2 is subjected to the pressure of the bending machine body 11 and the resistance force of the bottom, causing the bending device 2 to bend. Therefore, the stability of the middle fixed axis 25 is ensured by the design of the plug-in fixing component 3 and the stretching drive component 4.

[0041] When the bending device 2 needs to be bent, the staff pulls out the stretching rod 45, and the swing plate 42 rotatably connected to the stretching rod 45 rotates around the fixed shaft 41. At this time, one end of the swing plate 42 will abut against the abutment plate 47, thereby driving the movable plate 32 fixedly connected to the abutment plate 47 to lift upward. At this time, the plug-in fixing plate 34 fixedly connected to the movable plate 32 slides upward synchronously, so that the middle No. 1 connecting plate 24 and the middle No. 2 connecting plate 26, which were originally unable to rotate due to the plug-in fixing plate 34, can start to rotate. Rotate, after the middle fixed shaft 25 is stretched to a suitable position, release the stretching rod 45, and at this time, due to the reset function of the torsion spring 43 and the No. 1 spring 36, the plug-in fixing plate 34 will be reinserted into the plug-in fixing groove 35, thereby ensuring the shear strength of the middle No. 1 connecting plate 24, the middle fixed shaft 25 and the middle No. 2 connecting plate 26, thereby effectively preventing the bending device 2 from being subjected to the pressure of the bending machine body 11 and the resistance force at the bottom, causing the bending device 2 to bend, effectively ensuring the normal progress of the bending process.

[0042] Embodiment 2: This embodiment is intended to solve the problem that the fixed shaft 25 may shake forward and backward. This embodiment is an explanation based on Embodiment 1. For details, please refer to Figures 1 to 12 , limit assemblies 5 are provided at both ends of the middle fixed shaft 25, and the limit assemblies 5 include a cross plate 51, and the side wall of the cross plate 51 is fixedly connected with a mounting rod 56, and the other end of the mounting rod 56 is fixedly connected in the bending machine body 11, and the upper and lower ends of the cross plate 51 are fixedly connected with the upper fixed shaft 22 and the lower fixed shaft 28, and an intermediate slide groove 52 is provided in the cross plate 51, and a rectangular fixed block 53 is slidably connected in the intermediate slide groove 52, and the side wall of the rectangular fixed block 53 is fixedly connected with the middle fixed shaft 25, and the side wall of the rectangular fixed block 53 is provided with a T-shaped rotating groove 54, and a T-shaped rotating rod 55 is rotatably connected in the T-shaped rotating groove 54.

[0043] A reinforcing fixing assembly 6 is provided at the upper end of the T-shaped rotating groove 54, and the reinforcing fixing assembly 6 includes a reinforcing groove 61 opened at the upper end of the rectangular fixing block 53, and a plug-in rod 62 is slidably connected in the reinforcing groove 61. The upper end of the plug-in rod 62 is inserted in the reinforcing fixing groove 67, and the reinforcing fixing groove 67 is opened in the cross plate 51. The lower end of the plug-in rod 62 is inserted in the triangular slot 66, and the triangular slot 66 is opened in the T-shaped rotating rod 55.

[0044] A reset plate 64 is fixedly connected to the side wall of the plug rod 62, and the reset plate 64 is slidably connected in the reset groove 63. A reset spring 65 is fixedly connected to the bottom of the reset plate 64, and the other end of the reset spring 65 is fixedly connected to the bottom of the reset groove 63. The reset groove 63 is opened in the rectangular fixed block 53.

[0045] The design of the limit assembly 5 ensures the relative position of the lower bending mold plate 29, while ensuring the stability of the middle fixed shaft 25 when sliding, and improves the shear strength of the bending device 2 when not bending. By opening the middle slide groove 52 and connecting the rectangular fixed block 53 and the middle fixed shaft 25, the stability of the middle fixed shaft 25 sliding left and right is improved.

[0046] When it is necessary to drive the middle fixed shaft 25 to slide, the T-shaped rotating rod 55 is rotated first. At this time, the plug rod 62 above the T-shaped rotating rod 55 will slide downward under the action of the return spring 65 and insert into the triangular slot 66. At this time, the top of the plug rod 62 is separated from the reinforced fixing groove 67. The rectangular fixing block 53 is not restricted by the plug-in connection between the plug rod 62 and the reinforced fixing groove 67, and can slide in the middle slide groove 52. When it is necessary to fix the center fixed shaft 25, the T-shaped rotating rod 55 is continued to be rotated. At this time, due to The triangular design of the triangular slot 66 and the bottom of the plug-in rod 62 allows the T-shaped rotating rod 55 to push the plug-in rod 62 to slide upward during the rotation. At this time, the plug-in rod 62 will be reinserted into the reinforced fixing groove 67, and the bottom of the plug-in rod 62 will be resisted by the side wall of the T-shaped rotating rod 55, thereby effectively limiting the relative position of the rectangular fixing block 53, effectively preventing the middle fixed axis 25 from shaking, further improving the shear strength of the bending device 2, and further ensuring the stability of the bending device 2 during the bending process.

[0047] Embodiment 3, this embodiment is intended to promote the solution of the problem that the connection between the middle fixed shaft 25 and the middle No. 1 connecting plate 24 and the middle No. 2 connecting plate 26 may be blocked. This embodiment is an explanation based on the embodiment 2. For details, please refer to Figures 1 to 12 Several groups of lubrication components 7 are arranged in the middle fixed shaft 25. The lubrication components 7 include a lubrication bin 71 fixedly connected in the middle fixed shaft 25. A bellows 72 is fixedly connected to the bottom of the lubrication bin 71. A bottom plate 73 is fixedly connected to the bottom of the bellows 72. A piston plate 74 is slidably connected in the lubrication bin 71. A stop plate 75 is fixedly connected to the bottom of the piston plate 74. The other end of the stop plate 75 is arranged outside the lubrication bin 71. A piston spring 710 is fixedly connected to the upper end of the piston plate 74. The other end of the piston spring 710 is installed in the lubrication bin 71.

[0048] When the movable plate 32 slides in the movable groove 31, one side of the movable plate 32 abuts against the abutment plate 75. At this time, the piston plate 74 fixedly connected to the abutment plate 75 will slide upward in the lubrication chamber 71. When the movable plate 32 no longer abuts against the abutment plate 75, the piston plate 74 slides downward under the action of the piston spring 710. When the piston plate 74 slides upward, the lubricating oil in the lubrication chamber 71 is supplied to the outside through the one-way output channel 76. Since a sponge 77 is provided in the one-way output channel 76, and the sponge 77 is water-absorbent, each squeezing of the piston plate 74 will deliver the lubricating oil to the sponge 77. During each sliding process of the middle fixed shaft 25, the outer wall of the middle fixed shaft 25 will always come into contact and rub against the inner wall of the ring blocks of the middle connecting plate No. 1 24 and the middle connecting plate No. 2 26. Through this friction, the lubricating oil in the sponge 77 can be effectively squeezed out, and the lubricating oil can be more evenly applied through the continuous rotation of the middle fixed shaft 25, the middle connecting plate No. 2 26 and the middle connecting plate No. 1 24, thereby effectively avoiding the problem of embolism in the connection between the middle fixed shaft 25 and the middle connecting plate No. 1 24 and the middle connecting plate No. 2 26, thereby improving the stability of the bending process of the bending device 2.

[0049] The design of the bellows 72 can effectively expand the volume of the lubrication chamber 71 . However, if the lubrication chamber 71 is designed to be too large, it may affect the normal sliding of the movable plate 32 in the movable groove 31 . Therefore, the telescopic design of the bellows 72 can effectively ensure the normal sliding of the movable plate 32 .

[0050] A one-way output channel 76 is defined in the middle fixed shaft 25 , and a sponge 77 is disposed in the one-way output channel 76 .

[0051] The plurality of lubrication bins 71 are connected to each other via connecting pipes 79 , wherein one side of the outermost lubrication bin 71 is connected to a one-way input pipe 78 .

[0052] The other end of the one-way input pipe 78 is used to connect to the lubricating oil tank. Through the piston movement of the piston plate 74, and the one-way design of the one-way output channel 76 and the one-way input pipe 78, the internal space of the lubrication component 7 is sealed. Through the sliding of the piston plate 74, the lubricating oil can be continuously drawn into the internal space through the connecting pipe 79 to ensure the supply of lubricating oil.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hydraulic sheet metal bending device, comprising a bending device (1), characterized in that: The bending device (1) comprises a bending machine body (11), a lower mounting block (12) and an upper mounting block (13) being mounted on the inner wall of the bending machine body (11), a lower mold (14) being mounted in the lower mounting block (12), and a bending device (2) being mounted in the upper mounting block (13); The bending device (2) comprises an upper fixed plate (21) mounted in the upper mounting block (13); the bottom of the upper fixed plate (21) is rotatably connected to an upper fixed shaft (22); the side wall of the upper fixed shaft (22) is rotatably connected to an upper rotating plate (23); a middle No. 1 connecting plate (24) is mounted at the bottom of the upper rotating plate (23); a middle fixed shaft (25) is mounted at the bottom of the middle No. 1 connecting plate (24); a middle No. 2 connecting plate (26) is rotatably connected to the outer side wall of the middle fixed shaft (25); a lower rotating plate (27) is mounted at the bottom of the middle No. 2 connecting plate (26); the bottom of the lower rotating plate (27) is rotatably connected to a lower fixed shaft (28); and the outer side wall of the lower fixed shaft (28) is rotatably connected to a lower bending mold plate (29).

2. The hydraulic sheet metal bending equipment according to claim 1, characterized in that: The bottoms of the upper rotating plate (23) and the middle second connecting plate (26) are provided with telescopic grooves (210), a telescopic block (211) is inserted into the telescopic grooves (210), and the bottom of the telescopic block (211) is fixedly connected to the top of the middle first connecting plate (24) and the top of the lower rotating plate (27).

3. A hydraulic sheet metal bending device according to claim 2, characterized in that: A plug-in fixing assembly (3) is arranged in the middle fixed shaft (25), and the plug-in fixing assembly (3) comprises a movable groove (31) provided in the middle fixed shaft (25), a movable plate (32) is slidably connected in the movable groove (31), a plug-in fixing plate (34) is fixedly connected to one side of the movable plate (32), the plug-in fixing plate (34) is slidably connected in a placement slide groove (33), the placement slide groove (33) is provided on the side wall of the middle fixed shaft (25), the other end of the plug-in fixing plate (34) is plugged in the plug-in fixing groove (35), the plug-in fixing groove (35) is provided at one end of the middle No. 1 connecting plate (24) and the middle No. 2 connecting plate (26), and a No. 1 spring (36) is fixedly connected to the side of the movable plate (32) away from the plug-in fixing plate (34).

4. The hydraulic sheet metal bending equipment according to claim 3, characterized in that: A stretching drive assembly (4) is provided at both ends of the movable plate (32). The stretching drive assembly (4) comprises a fixed shaft (41) fixedly connected in the movable groove (31). The outer side wall of the fixed shaft (41) is rotatably connected to a swing plate (42). The fixed shaft (41) and the swing plate (42) are connected via a torsion spring (43). An end of the swing plate (42) away from the movable plate (32) is fixedly connected to an end shaft (44). The side wall of the end shaft (44) is rotatably connected to a stretching rod (45). The stretching rod (45) is slidably connected in an installation groove (46). The installation groove (46) is provided at both ends of the middle fixed shaft (25). An end of the swing plate (42) away from the end shaft (44) is abutted against a contact plate (47). The contact plate (47) is fixedly connected to both ends of the movable plate (32).

5. The hydraulic sheet metal bending equipment according to claim 1, characterized in that: A limit assembly (5) is provided at both ends of the middle fixed shaft (25), the limit assembly (5) comprising a cross plate (51), a side wall of the cross plate (51) being fixedly connected to a mounting rod (56), the other end of the mounting rod (56) being fixedly connected to the inside of the bending machine body (11), the upper and lower ends of the cross plate (51) being fixedly connected to the upper fixed shaft (22) and the lower fixed shaft (28), a middle slide groove (52) being provided in the cross plate (51), a rectangular fixed block (53) being slidably connected in the middle slide groove (52), a side wall of the rectangular fixed block (53) being fixedly connected to the middle fixed shaft (25), a side wall of the rectangular fixed block (53) being provided with a T-shaped rotation groove (54), a T-shaped rotation rod (55) being rotatably connected in the T-shaped rotation groove (54).

6. The hydraulic sheet metal bending equipment according to claim 5, characterized in that: A reinforcing fixing assembly (6) is provided at the upper end of the T-shaped rotating groove (54), the reinforcing fixing assembly (6) comprising a reinforcing groove (61) provided at the upper end of the rectangular fixing block (53), a plug-in rod (62) being slidably connected in the reinforcing groove (61), the upper end of the plug-in rod (62) being plugged into a reinforcing fixing groove (67), the reinforcing fixing groove (67) being provided in the cross plate (51), the lower end of the plug-in rod (62) being plugged into a triangular slot (66), the triangular slot (66) being provided in the T-shaped rotating rod (55).

7. The hydraulic sheet metal bending equipment according to claim 6, characterized in that: A reset plate (64) is fixedly connected to the side wall of the plug rod (62), and the reset plate (64) is slidably connected in the reset groove (63). A reset spring (65) is fixedly connected to the bottom of the reset plate (64), and the other end of the reset spring (65) is fixedly connected to the bottom of the reset groove (63). The reset groove (63) is opened in the rectangular fixed block (53).

8. The hydraulic sheet metal bending equipment according to claim 1, characterized in that: A plurality of groups of lubrication components (7) are arranged in the middle fixed shaft (25). The lubrication components (7) include a lubrication bin (71) fixedly connected to the middle fixed shaft (25). The bottom of the lubrication bin (71) is fixedly connected to a bellows (72). The bottom of the bellows (72) is fixedly connected to a bottom plate (73). A piston plate (74) is slidably connected in the lubrication bin (71). The bottom of the piston plate (74) is fixedly connected to a stop plate (75). The other end of the stop plate (75) is arranged outside the lubrication bin (71). The upper end of the piston plate (74) is fixedly connected to a piston spring (710). The other end of the piston spring (710) is installed in the lubrication bin (71).

9. The hydraulic sheet metal bending equipment according to claim 8, characterized in that: A one-way output channel (76) is provided in the middle fixed shaft (25), and a sponge (77) is provided in the one-way output channel (76).

10. The hydraulic sheet metal bending equipment according to claim 9, characterized in that: A plurality of the lubrication bins (71) are connected via a connecting pipe (79), wherein one side of the outermost lubrication bin (71) is connected to a one-way input pipe (78).

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