Combined drilling and stamping device for high-low voltage switch cabinet sheet metal parts

Abstract

The application discloses a high-low voltage switch cabinet sheet metal part combined drilling and stamping processing device and relates to the technical field of sheet metal part processing. The high-low voltage switch cabinet sheet metal part combined drilling and stamping processing device comprises a stamping head and a lower die. The stamping head comprises a stamping inner core and an outer frame. The outer frame is arranged on the outer periphery of the stamping inner core and can slide on the stamping inner core in the stamping direction. The lower die comprises a bearing plate and a limiting frame. The limiting frame is arranged on the upper surface of the bearing plate. The middle part of the limiting frame is surrounded by a square structure and forms a female die. The upper surface of the limiting frame is provided with a groove. A secondary bending push plate with an L-shaped structure is arranged in the groove. A wedge-shaped push block is arranged below the secondary bending push plate inside the groove. Through the cooperation between the stamping inner core and the outer frame and the pushing of the secondary bending push plate, the one-time bending and the secondary bending of a workpiece are realized. The distance between the right-angle outer support frame, the wedge-shaped embedded block and the stamping inner core is adjusted through a driving assembly. The workpiece is conveniently stripped. The processing efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet metal processing, in particular to a combined drilling and stamping processing device for sheet metal parts of high-low voltage switch cabinets. BACKGROUND

[0002] In the production and processing of high-low voltage switch cabinets, various processing methods are used, such as turning, milling, planing, grinding, cutting, drilling, and boring. Drilling includes the most common drilling and tapping operations. Since existing drilling and tapping operations are processed on two devices, the metal processing production efficiency is reduced. The current sheet metal drilling and tapping all-in-one machine is not convenient for positioning sheet metal parts of different sizes, and it is not convenient for punching or tapping different positions of sheet metal parts.

[0003] Chinese patent CN217493355U discloses a sheet metal drilling and tapping all-in-one machine. The device is connected to the fixed seat through a threaded rod, so that the rotation of the threaded rod can drive the connecting block to move horizontally in the through slot, and the horizontal position of the sheet metal part can be adjusted. At the same time, the position of the drilling or tapping tool can be adjusted by rotating the connecting rod and the bottom plate. By adjusting the horizontal position of the sheet metal part, it is convenient to drill or tap different positions on the sheet metal part.

[0004] To improve installation convenience, enhance sealing performance after assembly, or achieve one-time molding of small cabinet bodies to improve the overall structural strength of the cabinet body, the plate is usually processed into a rigid frame structure with a specific geometric profile (as shown in the drawings Figure 18 and the drawings Figure 20 ). Currently, the production of such frame structures generally relies on a process route of first drilling and positioning, and then multiple independent stamping / bending operations. This multi-process, step-by-step processing method significantly increases the production cycle time and the number of tooling changes, resulting in reduced overall production efficiency. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides a combined drilling and stamping processing device for sheet metal parts of high-low voltage switch cabinets, which solves the problems raised in the background art.

[0006] In order to achieve the above object, the present application is realized by the following technical scheme: The high-low voltage switch cabinet sheet metal part combined drilling and stamping device comprises a stamping head and a lower die, the stamping head comprises a stamping inner core and an outer frame, the outer frame is arranged on the outer periphery of the stamping inner core and can slide on the stamping inner core in the stamping direction; the lower die comprises a bearing plate and a limiting frame, the limiting frame is arranged on the upper surface of the bearing plate, a square structure is formed in the middle of the limiting frame and a concave die is formed, a groove is arranged on the upper surface of the limiting frame, a secondary bending push plate with an L-shaped structure is arranged in the groove, and a wedge-shaped push block is arranged below the secondary bending push plate inside the groove; when the lower surface of the outer frame and the lower surface of the stamping inner core are on the same horizontal plane, the stamping inner core and the outer frame are fixed by a limiting insert for pressing down the fixed plate, after the limiting insert is unlocked, the stamping inner core presses down to form a first bending of the plate in the concave die; the wedge-shaped push block goes up inside the groove and can push the secondary bending push plate to slide towards the center of the concave die, so that the plate is formed with a second bending.

[0007] Further, it further comprises: a punch arranged between two adjacent secondary bending push plates; a lifting frame arranged below the bearing plate, the upper surface of the lifting frame is fixed with a lifting rod, and the other end of the lifting rod is fixedly connected with the corresponding punch; wherein the first stage of lifting the lifting frame makes the punch act on the four corners of the plate for blanking the four corners of the plate, the second stage of lifting the lifting frame makes the punch continue to go up for unlocking the limiting insert, and the third stage of lifting the lifting frame is used for pushing the wedge-shaped push block to go up.

[0008] Further, the stamping inner core is provided with a slot at each corner position; the limiting insert comprises: a vertical cavity arranged on the outer frame in the vertical direction, a vertical piston is arranged in the vertical cavity, the lower end of the vertical piston is fixed with a top rod extending to the outside of the outer frame; a second horizontal cavity is arranged along the diagonal direction of the stamping inner core and is communicated with the vertical cavity, a first horizontal cavity is arranged at the end of the second horizontal cavity away from the stamping inner core, a horizontal piston is arranged in the first horizontal cavity, a second spring is arranged between the first horizontal cavity and the horizontal piston, and the other end of the horizontal piston is provided with a movable plug rod matched with the slot; wherein the inside of the second horizontal cavity on the side of the horizontal piston away from the stamping inner core and the inside of the vertical cavity above the vertical piston are filled with hydraulic oil, and the upward movement of the vertical piston can make the horizontal piston move away from the stamping inner core, so that the end of the movable plug rod is separated from the slot.

[0009] Furthermore, it also includes: right-angled outer supports, located at the four corners of the lower outer side of the stamping inner core; wedge-shaped fitting blocks, located between two adjacent right-angled outer supports, with the contact parts between the wedge-shaped fitting blocks and the right-angled outer supports being inclined structures; inclined slide grooves, located on the outer side of the stamping inner core; inclined sliders, located on the inner side of the wedge-shaped fitting blocks and slidably connected to the inclined slide grooves, the inclined sliders moving upwards inside the inclined slide grooves can reduce the distance between the wedge-shaped fitting blocks and the stamping inner core; and a drive assembly, located inside the stamping inner core, used to drive the right-angled outer supports to move along the diagonal direction of the stamping inner core; wherein, when the drive assembly drives the right-angled outer supports to the farthest distance from the stamping inner core, the right-angled outer supports and the wedge-shaped fitting blocks form a frame structure adapted to the die cavity and are embedded in the lower inner side of the outer frame.

[0010] Furthermore, the drive assembly includes: a rhomboid sliding sleeve rod located at the four corners of the stamping inner core, which slides along the diagonal of the stamping inner core, with one end of the rhomboid sliding sleeve rod fixedly connected to a right-angled outer support; a lead screw rotatably mounted at the bottom of the stamping inner core, with one end of the lead screw inserted into the rhomboid sliding sleeve rod and threadedly connected to it, and the other end of the lead screw being fitted with a driven bevel gear; and a servo motor fixed inside the stamping inner core, with an output end of the servo motor fitted with a driving bevel gear that meshes with the driven bevel gear.

[0011] Furthermore, it also includes: an outer fixing frame, fixed to the lower end of the outer side of the outer frame, and a buffer pad is provided on the lower surface of the outer fixing frame; a drilling machine, installed on the outer fixing frame, used for drilling holes in the secondary bending part of the plate; the upper surface of the secondary bending push plate is provided with a slot corresponding to the drilling machine, the bottom of the slot is a slope, and the outer side of the limiting frame is provided with a material leakage groove communicating with the slot.

[0012] Furthermore, it also includes: a limiting post, which is fixed above the outer frame; the stamped inner core moves upward so that the outer frame abuts against the bottom of the limiting post, until the stamped inner core and the outer frame are fixed by a limiting plug.

[0013] Furthermore, it also includes: a movable frame, which is disposed on the support plate and can slide on the support plate along the stamping direction, with the upper end of the movable frame fixedly connected to the wedge-shaped push block; and a first spring, which is disposed between the movable frame and the bottom of the support plate for resetting the movable frame.

[0014] Furthermore, the bottom of the die cavity is provided with a through groove, and an I-shaped seat adapted to the die cavity is slidably installed inside the through groove. A third spring is provided between the lower end of the die cavity and the I-shaped seat. The third spring is used to drive the I-shaped seat to move upward, so that the upper surface of the I-shaped seat is flush with the upper surface of the secondary bending push plate.

[0015] Furthermore, the upper surface of the punch is a beveled structure, used for unloading waste material after the four corners of the sheet metal are punched.

[0016] The present invention has the following beneficial effects:

[0017] (1) The high-low voltage switch cabinet sheet metal part combined drilling and punching processing device realizes one-time bending and two-time bending of the workpiece through the cooperation between the punching inner core and the outer frame and the pushing of the secondary bending push plate, adjusts the distance between the right-angle outer support frame, the wedge-shaped embedded block and the punching inner core through the driving assembly, facilitates the stripping of the formed workpiece, realizes the four-time bending of the plate, and greatly improves the processing efficiency.

[0018] (2) The high-low voltage switch cabinet sheet metal part combined drilling and punching processing device realizes the cutting of the excess material when the plate is formed through the action of the punch on the four corners of the plate, realizes the drilling treatment before bending under the action of the drilling machine, and the debris generated during drilling slides out from the leakage groove along the bottom of the slot, which prevents the mold from being stuck or the bending surface from being indented due to the accumulation of debris, avoids prolonging the manual cleaning cycle, and in addition, the cooperation of the outer fixing frame, the outer frame, the punching inner core and the secondary bending push plate can fix the plate, thereby improving the stability of the plate during drilling, realizing the whole process of drilling, four-corner blanking, one-time bending and two-time bending with one-time clamping, and further improving the sheet metal processing efficiency.

[0019] Of course, implementing any product of the present application does not necessarily require achieving all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the present application;

[0021] Figure 2 is a front view of the present application Figure 1 ;

[0022] Figure 3 is a structural schematic diagram of the internal structure of the present application;

[0023] Figure 4 is a structural schematic diagram of the present application when the punching inner core and the outer frame slide relative to each other;

[0024] Figure 5 is a front view of the present application Figure 4 ;

[0025] Figure 6 is a structural schematic diagram of the present application when the outer frame is reset;

[0026] Figure 7 is a front view of the present application Figure 6 ;

[0027] Figure 8 is a structural schematic diagram of the outer fixing frame in the present application;

[0028] Figure 9 is a structural schematic diagram of the punching inner core, the outer frame and the limiting plug in the present application;

[0029] Figure 10 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0030] Figure 11 Structure diagram of the right-angle outer support frame and wedge-shaped embedded block forming a frame structure in the application;

[0031] Figure 12 Structure diagram of the inclined surface sliding groove and inclined surface sliding block in cooperation in the application;

[0032] Figure 13 Structure diagram of the punch inner core, outer frame and driving assembly in the application; Figure 12 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0033] Figure 14 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0034] Figure 15 Structure diagram of the punch inner core, outer frame and driving assembly in the application; Figure 14 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0035] Figure 16 Structure diagram of the punch inner core, outer frame and driving assembly in the application; Figure 15 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0036] Figure 17 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0037] Figure 18 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0038] Figure 19 Structure diagram of the punch inner core, outer frame and driving assembly in the application;

[0039] Figure 20 Structure diagram of the punch inner core, outer frame and driving assembly in the application.

[0040] In the diagram, 1. Upper fixed plate; 2. Lower fixed plate; 3. Bearing plate; 4. Upper hydraulic cylinder; 5. Lower hydraulic cylinder; 6. Lifting frame; 7. Limiting post; 8. Stamped inner core; 9. Outer frame; 10. Guide rod; 11. Outer fixed frame; 12. Drilling machine; 13. Limiting frame; 14. Lifting rod; 15. Punch; 16. Material leakage chute; 17. Movable frame; 18. First spring; 19. Secondary bending push plate; 20. Inclined slide groove; 21. Right-angle outer support frame; 22. Wedge-shaped interlocking block; 23. Inclined slider; 24. I-shaped seat; 25. Groove; 26. Limiting plug; 2601 2602. Vertical cavity; 2603. First transverse cavity; 2604. Second transverse cavity; 2605. Movable insert rod; 2606. Transverse piston; 2607. Second spring; 2608. Push rod; 2609. Vertical piston; 27. Buffer pad; 28. Slot; 29. ​​Prism-shaped sliding sleeve rod; 30. Lead screw; 31. Driven bevel gear; 32. Servo motor; 33. Driven bevel gear; 34. Wedge-shaped push block; 35. Third spring; 36. Formed workpiece; 3601. First bending section; 3602. Second bending section; 3603. Drilling section; 37. Groove. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0043] The following is based on Figures 1-20 This invention describes a combined drilling and punching processing device for high and low voltage switchgear sheet metal parts provided in an embodiment of the invention.

[0044] like Figures 1-20 As shown, this embodiment of the invention provides a technical solution: a combined drilling and punching processing device for sheet metal parts of high and low voltage switchgear, including a punching head and a lower die. The punching head includes a punching inner core 8 and an outer frame 9. The outer frame 9 is located on the outer periphery of the punching inner core 8 and can slide on the punching inner core 8 along the punching direction. An upper fixing plate 1 is fixed above the punching inner core 8, and an upper hydraulic cylinder 4 is installed on the upper fixing plate 1. The upper hydraulic cylinder 4 is used to drive the punching inner core 8 to move.

[0045] As Figures 18-20 shown, in order to process the plate into a rigid frame structure with a specific geometric profile, the excess material at the four corners of the plate needs to be punched first, and then the plate is drilled. The drilling site 3603 generated during drilling is located on the secondary bending site 3602, so as to facilitate the subsequent installation of the formed workpiece 36. Then, the four side walls of the plate are subjected to twice bending treatment by stamping to form the primary bending site 3601 and the secondary bending site 3602.

[0046] The lower die provided by the embodiment includes a bearing plate 3 and a limiting frame 13. The limiting frame 13 is provided with notches at the four corners of the outer side. The limiting frame 13 is fixed to the upper surface of the bearing plate 3. The limiting frame 13 is surrounded by a square structure in the middle and forms a die. The upper surface of the limiting frame 13 is provided with a groove 37 (as Figure 16 shown). The height of the outer side wall of the groove 37 is greater than that of the inner side wall. The groove 37 is provided with a secondary bending push plate 19 in the shape of “L”. The secondary bending push plate 19 is slidably connected to the upper end of the inner side wall of the groove 37. A wedge-shaped push block 34 is arranged below the secondary bending push plate 19 in the interior of the groove 37. The wedge-shaped push block 34 is slidably connected to the inner side of the outer side wall of the groove 37, so that the wedge-shaped push block 34 can slide along the stamping direction.

[0047] When the lower surface of the outer frame 9 is at the same horizontal plane as the lower surface of the stamping inner core 8, the stamping inner core 8 and the outer frame 9 are fixed by the limiting plug-in part 26. At this time, the stamping inner core 8 moves downward and drives the outer frame 9 to move synchronously. It can be used to press the plate downward to fix the plate between the stamping head and the lower die. After the limiting plug-in part 26 is unlocked, the stamping inner core 8 continues to press downward, so that the plate is formed into a primary bending in the die. When the wedge-shaped push block 34 moves upward in the interior of the groove 37, it drives the secondary bending push plate 19 to slide toward the center of the die, so that the plate is formed into a secondary bending.

[0048] As Figures 1-7 shown, the high-low voltage switch cabinet sheet metal part combined drilling and stamping processing device provided by the embodiment further includes a punch 15 and a lifting frame 6. The punch 15 is arranged outside the included angle between two adjacent secondary bending push plates 19. The lifting frame 6 is arranged below the bearing plate 3. The lifting frame 6 is fixed with a lifting rod 14 on the upper surface. The other end of the lifting rod 14 is fixedly connected with the corresponding punch 15. The lifting frame 6 is raised in the first stage to drive the punch 15 to act on the four corners of the plate, so as to punch the four corners of the plate, so as to facilitate the forming of the primary bending and the secondary bending of the plate. The lifting frame 6 is raised in the second stage to drive the punch 15 to continue to move upward, so as to unlock the limiting plug-in part 26, so that the outer frame 9 and the stamping inner core 8 can slide relative to each other, thereby facilitating the stamping inner core 8 to be deeply formed into the die to form a primary bending. The lifting frame 6 is raised in the third stage to drive the wedge-shaped push block 34 to move upward, thereby driving the secondary bending push plate 19 to slide toward the center of the die, so that the plate is formed into a secondary bending.

[0049] Wherein, the lower fixed plate 2 is fixed below the lifting frame 6, and the lower hydraulic cylinder 5 for driving the lifting frame 6 to lift is installed on the lower fixed plate 2.

[0050] As shown in Figure 9 To realize the locking and unlocking between the outer frame 9 and the stamping inner core 8, the stamping inner core 8 of the embodiment is provided with the insertion slot 28 at the four corners, the limiting insert 26 includes the vertical cavity 2601 and the second transverse cavity 2603, the vertical cavity 2601 is arranged on the outer frame 9 in the vertical direction, and the vertical piston 2608 is arranged in the vertical cavity 2601, the top rod 2607 extending to the outside of the outer frame 9 is fixed to the lower end of the vertical piston 2608, the second transverse cavity 2603 is arranged along the diagonal direction of the stamping inner core 8 and communicates with the vertical cavity 2601, the first transverse cavity 2602 is arranged at the end of the second transverse cavity 2603 away from the stamping inner core 8, the transverse piston 2605 is arranged in the first transverse cavity 2602, and the second spring 2606 is arranged between the end of the first transverse cavity 2602 and the transverse piston 2605, and the movable insertion rod 2604 adapted to the insertion slot 28 is arranged at the other end of the transverse piston 2605.

[0051] It should be noted that the inside of the second horizontal cavity 2603 is located on the side of the horizontal piston 2605 towards the stamping inner core 8, and the inside of the vertical cavity 2601 is located above the vertical piston 2608, both of which are filled with hydraulic oil, when the vertical piston 2608 moves upwards to make the horizontal piston 2605 move away from the stamping inner core 8, the end of the movable plug rod 2604 is separated from the insertion slot 28, specifically, when the punch 15 pushes the top rod 2607 to move upwards, the vertical piston 2608 extrudes the hydraulic oil in the vertical cavity 2601, and the hydraulic oil enters the inside of the second horizontal cavity 2603, at this time, the hydraulic oil acts on the horizontal piston 2605, so that the horizontal piston 2605 moves away from the stamping inner core 8, further separates the end of the movable plug rod 2604 from the insertion slot 28 and compresses the second spring 2606, realizes the unlocking of the relative sliding of the outer frame 9 and the stamping inner core 8, at this time, the stamping inner core 8 continues to move downwards, and the outer frame 9 is continuously pushed upwards by the punch 15, so as to realize the one-time bending of the plate, after the movable plug rod 2604 is separated from the insertion slot 28, due to the relaxation of the second spring 2606 in the limiting plug-in part 26 and the reverse thrust of the compressed air in the first horizontal cavity 2602, the end of the movable plug rod 2604 can move towards the stamping inner core 8 and abut against the outer wall of the stamping inner core 8, so that the outer frame 9 can be fixed on the outer side of the stamping inner core 8, in this process, a pad is preferably installed at the end of the movable plug rod 2604 towards the insertion slot 28, so as to increase the friction between the stamping inner core 8 and the movable plug rod 2604, thereby improving the stability of the outer frame 9 fixed on the outer side of the stamping inner core 8, an arc-shaped tooth can also be arranged on the outer wall of the stamping inner core 8, and a tooth groove adapted to the arc-shaped tooth is arranged on the movable plug rod 2604, through the cooperation of the arc-shaped tooth and the tooth groove, the stability of the outer frame 9 fixed on the outer side of the stamping inner core 8 is further improved, when the end of the movable plug rod 2604 contacts the insertion slot 28 again, due to the relaxation of the second spring 2606 and the thrust of the compressed air in the first horizontal cavity 2602, the end of the movable plug rod 2604 can be quickly inserted into the inside of the insertion slot 28, so as to realize the locking between the outer frame 9 and the stamping inner core 8.

[0052] As Figures 9-13To facilitate the bending of the plate and the material removal after forming, the high-low voltage switch cabinet sheet metal combined drilling and stamping device also includes right-angled outer support frames 21 and wedge-shaped embedded blocks 22. The right-angled outer support frames 21 are arranged at the lower end of the four corners of the outer side of the stamping inner core 8, and the wedge-shaped embedded blocks 22 are arranged between the adjacent two right-angled outer support frames 21. The contact parts of the wedge-shaped embedded blocks 22 and the right-angled outer support frames 21 are all inclined surface structures. To adjust the position of the wedge-shaped embedded blocks 22, the high-low voltage switch cabinet sheet metal combined drilling and stamping device also includes inclined surface sliding grooves 20 and inclined surface sliding blocks 23. The inclined surface sliding grooves 20 are arranged on the outer side of the stamping inner core 8, and the inclined surface sliding blocks 23 are arranged on the inner side of the wedge-shaped embedded blocks 22 and are in sliding connection with the inclined surface sliding grooves 20. The inclined surface sliding blocks 23 move upward in the inclined surface sliding grooves 20, so that the distance between the wedge-shaped embedded blocks 22 and the stamping inner core 8 is reduced. It should be noted that the outer side wall of the wedge-shaped embedded blocks 22 is preferably an inclined surface, so as to prevent the wedge-shaped embedded blocks 22 from extruding the second bending part 3602 of the formed workpiece 36 when moving upward. However, since the outer side wall of the wedge-shaped embedded blocks 22 is an inclined surface, the shear force that the plate bears when being bent for the second time may be reduced. Therefore, the maximum length of the wedge-shaped embedded blocks 22 needs to be reduced as much as possible under the premise of normal operation of the equipment, so as to stabilize the shear force that the plate bears when being bent for the second time.

[0053] To drive the right-angled outer support frames 21, the scheme also includes a driving assembly arranged in the stamping inner core 8 and used to drive the right-angled outer support frames 21 to move along the diagonal direction of the stamping inner core 8. When the driving assembly drives the right-angled outer support frames 21 to be farthest away from the stamping inner core 8, the right-angled outer support frames 21 and the wedge-shaped embedded blocks 22 form a frame-shaped structure that is adapted to the concave die and is embedded into the inner lower end of the outer frame 9. At this time, the stamping inner core 8 moves downward and drives the frame-shaped structure to move downward into the concave die, so that the plate is bent for the first time through the shear force of the frame-shaped structure. To facilitate the second bending, the height of the right-angled outer support frames 21 is the same as that of the wedge-shaped embedded blocks 22 and is not greater than the depth of the concave die, so that when the plate is bent for the second time, the second bending push plate 19 slides toward the center of the concave die, so that the plate is bent for the second time at the bending part of the outer side wall of the upper surface of the right-angled outer support frames 21 and the wedge-shaped embedded blocks 22. The formed workpiece 36 after bending is wrapped on the outer surface of the frame-shaped structure formed by the right-angled outer support frames 21 and the wedge-shaped embedded blocks 22. At this time, the driving assembly works to move the right-angled outer support frames 21 toward the stamping inner core 8, so as to further reduce the distance between the adjacent two right-angled outer support frames 21. Through the extrusion effect of the inclined surface structures at the contact parts of the right-angled outer support frames 21 and the wedge-shaped embedded blocks 22, the inclined surface sliding blocks 23 on the wedge-shaped embedded blocks 22 move upward in the inclined surface sliding grooves 20, so that the distance between the wedge-shaped embedded blocks 22 and the stamping inner core 8 is reduced, and then the formed workpiece 36 is separated.

[0054] As Figures 10-13As shown, the driving assembly provided by the embodiment includes a prismatic sliding sleeve rod 29, a lead screw 30 and a servo motor 32, wherein the prismatic sliding sleeve rod 29 is arranged at the four corners of the stamping inner core 8 and slides along the diagonal lines of the stamping inner core 8, one end of the prismatic sliding sleeve rod 29 is fixedly connected with the right-angle outer support frame 21, the lead screw 30 is rotatably arranged at the inner bottom of the stamping inner core 8, one end of the lead screw 30 is inserted into the inside of the prismatic sliding sleeve rod 29 and is threadedly connected with the prismatic sliding sleeve rod 29, the other end of the lead screw 30 is provided with a driven bevel gear 31, and the servo motor 32 is fixedly arranged inside the stamping inner core 8 and is provided at the output end with a driving bevel gear 33 which is engaged with the driven bevel gear 31.

[0055] In work, the servo motor 32 drives the driving bevel gear 33 to rotate, the driving bevel gear 33 is engaged with the driven bevel gear 31, so that the driven bevel gear 31 drives the lead screw 30 to rotate, the lead screw 30 is threadedly connected with the prismatic sliding sleeve rod 29, so that the prismatic sliding sleeve rod 29 slides on the stamping inner core 8, thereby driving the right-angle outer support frame 21 to move.

[0056] As shown in Figure 6 , Figure 7 , Figure 8 , Figure 15 , Figure 16 and Figure 17 , in order to realize the drilling of the workpiece, the high-low voltage switch cabinet sheet metal part combined drilling stamping processing device provided by the embodiment further includes an outer fixing frame 11 and a drilling machine 12, the outer fixing frame 11 is fixedly arranged at the lower end outside the outer frame 9, and the lower surface of the outer fixing frame 11 is provided with a buffer pad 27 which is made of flexible material and is mainly used for buffering when the plate is drilled, preferably, a guide rod 10 is arranged between the upper fixed plate 1 and the bearing plate 3, the guide rod 10 is slidably connected with the outer fixing frame 11, so as to ensure the accuracy of the alignment between the stamping head and the lower die, and the drilling machine 12 is arranged on the outer fixing frame 11 and is used for drilling the second bending part 3602 of the plate, the upper surface of the second bending push plate 19 is provided with a notch 25 corresponding to the drilling machine 12, the bottom of the notch 25 is inclined, and the outer side of the limiting frame 13 is provided with a material leakage groove 16 which is communicated with the notch 25, wherein, when working, the drill bit of the drilling machine 12 drills the plate and extends into the inside of the notch 25, at this time, the debris generated during drilling will fall into the inside of the notch 25 and slide out from the material leakage groove 16 along the bottom of the notch 25, so as to prevent the debris from affecting the stamping process, and in use, the plate can be fixed by the cooperation of the outer fixing frame 11, the outer frame 9, the stamping inner core 8 and the second bending push plate 19, thereby improving the stability of the plate during drilling.

[0057] As shown in Figures 1-7As shown, in order to realize the reset of the outer frame 9 and the punch inner core 8 after unlocking, the high-low voltage switch cabinet sheet metal combined drilling and punching processing device provided in the embodiment further comprises a limiting pile 7 fixed above the outer frame 9. When the punch inner core 8 goes up, due to the relaxation of the second spring 2606 in the limiting plug-in part 26 and the thrust of the compressed air in the first horizontal cavity 2602, the one end of the movable plug rod 2604 can be moved towards the punch inner core 8 and be in abutment with the outer wall of the punch inner core 8, so that the outer frame 9 can go up with the punch inner core 8, and further abut with the bottom of the limiting pile 7, until the punch inner core 8 is fixed with the outer frame 9 through the limiting plug-in part 26.

[0058] As shown in Figure 15 and Figure 16 As shown, in order to realize the driving of the wedge-shaped push block 34, the high-low voltage switch cabinet sheet metal combined drilling and punching processing device provided in the embodiment further comprises a movable frame 17 and a first spring 18. The movable frame 17 is arranged on the bearing plate 3 and can slide on the bearing plate 3 in the punching direction. The upper end of the movable frame 17 is fixedly connected with the wedge-shaped push block 34. The first spring 18 is arranged between the movable frame 17 and the bottom of the bearing plate 3 and is used for resetting the movable frame 17. In order to facilitate the reset of the secondary bending push plate 19, a limiting sliding block is fixed at the position close to the upper end at the contact position of the secondary bending push plate 19 and the wedge-shaped push block 34. A limiting sliding groove is arranged on the wedge-shaped push block 34. The limiting sliding block and the limiting sliding groove are in sliding connection. The limiting sliding groove pulls the limiting sliding block to move through the reset of the wedge-shaped push block 34, and then the secondary bending push plate 19 is reset.

[0059] In the third stage of the lifting of the lifting frame 6, the lifting frame 6 pushes the movable frame 17 to go up, further pushes the wedge-shaped push block 34 to go up and compresses the first spring 18, so as to push the secondary bending push plate 19 to slide towards the center of the die, and make the plate material form secondary bending.

[0060] As shown in Figures 14-17 As shown, in order to realize the fixed support during the punching and drilling of the four corners of the plate material and the unloading after the punching, a through groove is arranged at the bottom of the die. A I-shaped seat 24 adapted to the die is slidably arranged in the through groove. A third spring 35 is arranged between the lower end in the die and the I-shaped seat 24. The third spring 35 is used for driving the I-shaped seat 24 to go up, so that the upper surface of the I-shaped seat 24 is flush with the upper surface of the secondary bending push plate 19, thereby realizing the support of the lower surface of the plate material during the punching and drilling of the four corners of the plate material. After the punching is completed, the third spring 35 relaxes to make the I-shaped seat 24 go up, and then the formed workpiece 36 on the I-shaped seat 24 is lifted up, so as to facilitate the unloading of the formed workpiece 36.

[0061] As shown in Figure 14 As shown, in order to facilitate the discharge of the punching waste, the upper surface of the punch 15 is in a slope structure, so that the waste after punching can slide out along the slope structure, which is used for the unloading of the waste after the punching of the four corners of the plate material.

[0062] In use (at work), the square metal plate is placed on the upper surface of the work seat 24, and the punch inner core 8 and the outer frame 9 are lowered synchronously by the upper hydraulic cylinder 4 until they abut against the upper surface of the plate. At this time, the plate is fixed between the concave die and the punch head. The drill 12 and the lower hydraulic cylinder 5 are started, and the drill bit of the drill 12 drills holes in the plate and extends into the notch 25. At this time, the debris generated during drilling falls into the notch 25 and slides out of the material leakage groove 16 along the bottom of the notch 25 to prevent the debris from affecting the punching process. The lower hydraulic cylinder 5 drives the lifting frame 6 to rise by the first stage, and the lifting frame 6 drives the lifting rod 14 to rise, and then the punch 15 rises. The punch 15 punches the excess material at the four corners of the plate. The lower hydraulic cylinder 5 drives the lifting frame 6 to rise by the second stage, and the punch 15 drives the ejector rod 2607 to rise, so that the vertical piston 2608 extrudes the hydraulic oil in the vertical cavity 2601, and the hydraulic oil enters the second horizontal cavity 2603. At this time, the hydraulic oil acts on the horizontal piston 2605, so that the horizontal piston 2605 moves away from the punch inner core 8, further separates the one end of the movable plug rod 2604 from the plug slot 28, and compresses the second spring 2606, so as to realize the unlocking of the relative sliding between the outer frame 9 and the punch inner core 8. At this time, the punch inner core 8 is continuously lowered by the upper hydraulic cylinder 4, and the outer frame 9 is continuously raised by the punch 15, so as to realize the one-time bending of the plate. The lower hydraulic cylinder 5 drives the lifting frame 6 to rise by the third stage, and the lifting frame 6 drives the movable frame 17 to rise, further drives the wedge-shaped push block 34 to rise and compresses the first spring 18, so as to drive the secondary bending push plate 19 to slide towards the center of the concave die, so as to form the secondary bending of the plate.

[0063] At this time, the servo motor 32 is started and the upper hydraulic cylinder 4 and the lower hydraulic cylinder 5 are controlled to return, the driving bevel gear 33 is driven to rotate by the servo motor 32, the driven bevel gear 31 is driven to rotate by the meshing of the driving bevel gear 33 and the driven bevel gear 31, the prismatic sliding sleeve rod 29 is driven to slide on the stamping inner core 8 by the threaded connection of the lead screw 30 and the prismatic sliding sleeve rod 29, the distance between the two adjacent right-angled outer support frames 21 is further reduced, the inclined surface sliding block 23 on the wedge-shaped embedded block 22 is driven to move upward in the inclined surface sliding groove 20 by the extrusion of the inclined surface structure at the contact position of the right-angled outer support frame 21 and the wedge-shaped embedded block 22, the distance between the wedge-shaped embedded block 22 and the stamping inner core 8 is reduced, and then the formed workpiece 36 is separated from the stamping inner core 8. After the formed workpiece 36 is separated, it stays on the upper surface of the work-shaped seat 24, the work-shaped seat 24 moves upward under the relaxation of the third spring 35, and then the formed workpiece 36 on the work-shaped seat 24 is lifted to facilitate the unloading of the formed workpiece 36. The lifting frame 6 is separated from the movable frame 17 by the return of the lower hydraulic cylinder 5, the movable frame 17 is reset under the action of the gravity and the elastic force of the first spring 18, the wedge-shaped push block 34 is reset, the limiting sliding groove on the wedge-shaped push block 34 pulls the limiting sliding block on the secondary bending push plate 19 to move, and then the secondary bending push plate 19 is reset. The upper hydraulic cylinder 4 returns, and the movable plug rod 2604 is driven to move toward the stamping inner core 8 and abut against the outer wall of the stamping inner core 8 under the action of the relaxation of the second spring 2606 in the limiting plug-in part 26 and the thrust of the compressed air in the first horizontal cavity 2602, so that the outer frame 9 moves upward with the stamping inner core 8 until the outer frame 9 contacts the limiting post 7. At this time, the stamping inner core 8 continues to move upward, and the outer frame 9 stays at the lower end of the limiting post 7 under the action of the limiting post 7, so that the outer frame 9 moves downward relative to the stamping inner core 8 until the one end of the movable plug rod 2604 contacts the plug slot 28 again. Under the action of the further relaxation of the second spring 2606 and the thrust of the compressed air in the first horizontal cavity 2602, the one end of the movable plug rod 2604 is quickly inserted into the plug slot 28, so as to lock the outer frame 9 and the stamping inner core 8, and facilitate the next stamping and drilling.

Claims

1. A combined drilling and stamping device for sheet metal parts of high and low voltage switch cabinets, comprising a stamping head and a lower die, characterized in that: the stamping head comprises a stamping inner core (8) and an outer frame (9), the outer frame (9) is arranged on the outer periphery of the stamping inner core (8), and the outer frame (9) can slide on the stamping inner core (8) in the stamping direction; the lower die comprises a bearing plate (3) and a limiting frame (13), the limiting frame (13) is arranged on the upper surface of the bearing plate (3), the middle part of the limiting frame (13) is surrounded by a square structure and forms a concave die, and the upper surface of the limiting frame (13) is provided with a groove (37), the groove (37) is provided with a secondary bending push plate (19) in the form of "L", and a wedge-shaped push block (34) is arranged below the secondary bending push plate (19) inside the groove (37); wherein, when the lower surface of the outer frame (9) and the lower surface of the stamping inner core (8) are in the same horizontal plane, the stamping inner core (8) and the outer frame (9) are fixed by a limiting insert (26) for pressing down the sheet material, after the limiting insert (26) is unlocked, the stamping inner core (8) presses down to form a first bending of the sheet material in the concave die; the wedge-shaped push block (34) moves upward inside the groove (37) and can push the secondary bending push plate (19) to slide towards the center of the concave die, so that the sheet material forms a second bending; the combined drilling and stamping device for sheet metal parts of high and low voltage switch cabinets further comprises: a punch (15) arranged between two adjacent secondary bending push plates (19); a lifting frame (6) arranged below the bearing plate (3), the upper surface of the lifting frame (6) is fixed with a lifting rod (14), and the other end of the lifting rod (14) is fixedly connected with the corresponding punch (15); wherein, the lifting frame (6) rises in the first stage to make the punch (15) act on the four corners of the sheet material for blanking the four corners of the sheet material, the lifting frame (6) rises in the second stage to make the punch (15) continue to move upward for unlocking the limiting insert (26), and the lifting frame (6) rises in the third stage for pushing the wedge-shaped push block (34) to move upward. The stamping inner core (8) is provided with a slot (28) at each corner position; The limiting insert (26) comprises: a vertical cavity (2601) arranged on the outer frame (9) in the vertical direction, a vertical piston (2608) arranged in the vertical cavity (2601), a top rod (2607) extending to the outside of the outer frame (9) fixed to the lower end of the vertical piston (2608); a second horizontal cavity (2603) arranged along the diagonal direction of the stamping inner core (8) and communicated with the vertical cavity (2601), a first horizontal cavity (2602) arranged at one end of the second horizontal cavity (2603) away from the stamping inner core (8), a horizontal piston (2605) arranged in the first horizontal cavity (2602), and a second spring (2606) arranged between one end of the first horizontal cavity (2602) and the horizontal piston (2605), and an movable insertion rod (2604) adapted to the slot (28) arranged at the other end of the horizontal piston (2605); ​ ​ ​ ​ ​ ​ 2. The high-low voltage switchgear sheet metal assembly combined drilling and punching processing device according to claim 1, characterized in that, ​ ​ ​ ​ The second transverse cavity (2603) inside is located on the side of the transverse piston (2605) facing the stamping inner core (8), and the vertical cavity (2601) inside is located above the vertical piston (2608), and the upward movement of the vertical piston (2608) can drive the transverse piston (2605) to move away from the stamping inner core (8), so that one end of the movable insertion rod (2604) is separated from the insertion slot (28).

3. The high-low voltage switchgear sheet metal assembly combined drilling and punching processing device according to claim 2, characterized in that, Further comprising: The right-angled outer support frame (21) is arranged at the lower end of the four corners of the outer side of the stamping inner core (8); The wedge-shaped embedded block (22) is arranged between the two adjacent right-angled outer support frames (21), and the contact part of the wedge-shaped embedded block (22) with the right-angled outer support frame (21) is a slope structure; The slope sliding groove (20) is arranged on the outer side of the stamping inner core (8); The slope sliding block (23) is arranged on the inner side of the wedge-shaped embedded block (22) and is in sliding connection with the slope sliding groove (20), and the upward movement of the slope sliding block (23) in the slope sliding groove (20) can reduce the distance between the wedge-shaped embedded block (22) and the stamping inner core (8); The driving assembly is arranged in the stamping inner core (8) and is used for driving the right-angled outer support frame (21) to move along the diagonal direction of the stamping inner core (8); When the driving assembly drives the right-angled outer support frame (21) to be farthest from the stamping inner core (8), the right-angled outer support frame (21) and the wedge-shaped embedded block (22) form a frame-shaped structure matched with the concave die and are embedded into the inner side of the outer frame (9).

4. The high-low voltage switchgear sheet metal assembly combined drilling and punching processing device according to claim 3, characterized in that, The driving assembly comprises: The prismatic sliding sleeve rod (29) is arranged at the four corners of the stamping inner core (8) and slides along the diagonal line of the stamping inner core (8), and one end of the prismatic sliding sleeve rod (29) is fixedly connected with the right-angled outer support frame (21); The screw rod (30) is rotatably arranged on the inner bottom of the stamping inner core (8), one end of the screw rod (30) is inserted into the prismatic sliding sleeve rod (29) and is in threaded connection with the prismatic sliding sleeve rod (29), and the other end of the screw rod (30) is provided with a driven bevel gear (31); The servo motor (32) is fixedly arranged in the stamping inner core (8), and the output end of the servo motor (32) is provided with a driving bevel gear (33) in meshing connection with the driven bevel gear (31).

5. The high-low voltage switchgear sheet metal assembly combined drilling and punching processing device according to claim 4, characterized in that, Further comprising: The outer fixed frame (11) is fixed to the lower end of the outer side of the outer frame (9), and the lower surface of the outer fixed frame (11) is provided with a buffer pad (27); The drilling machine (12) is arranged on the outer fixed frame (11) and is used for drilling holes in the second bending part (3602) of the plate; The upper surface of the second bending push plate (19) is provided with a notch (25) corresponding to the drilling machine (12), the bottom of the notch (25) is a slope, and the outer side of the limiting frame (13) is provided with a material leakage groove (16) in communication with the notch (25).

6. The high-low voltage switchgear sheet metal assembly combined drilling and punching processing device according to claim 5, characterized in that, Further comprising: The limiting pile (7) is fixed above the outer frame (9); The upward movement of the stamping inner core (8) can make the outer frame (9) abut against the bottom of the limiting pile (7), and the stamping inner core (8) and the outer frame (9) are fixed through the limiting insert (26).

7. The combined drilling and punching device for sheet metal parts of high and low voltage switchgear cabinets according to any of claims 1 to 6, characterized in that Further comprising: The movable frame (17) is arranged on the bearing plate (3) and can slide on the bearing plate (3) along the punching direction, and the upper end of the movable frame (17) is fixedly connected with the wedge-shaped push block (34); The first spring (18) is arranged between the movable frame (17) and the bottom of the bearing plate (3) and is used for resetting the movable frame (17).

8. The high-low voltage switchgear sheet metal assembly combined drilling and punching processing device according to claim 7, characterized in that: The bottom of the die is provided with a through groove, and a I-shaped seat (24) matched with the die is slidably arranged in the through groove; a third spring (35) is arranged between the lower end of the die and the I-shaped seat (24), and the third spring (35) is used for driving the I-shaped seat (24) to move upward, so that the upper surface of the I-shaped seat (24) is flush with the upper surface of the secondary bending push plate (19).

9. The high-low voltage switchgear sheet metal assembly combined drilling and punching processing device according to claim 8, characterized in that: The upper surface of the punch (15) is a slope structure.

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