An aircraft connecting belt plate punching device

Abstract

The present invention relates to the field of aircraft accessory processing equipment, and specifically to a punching device for aircraft connecting belt plates. It includes a gantry fixed on a base. A motor and a lifting cylinder are fixed on the crossbeam of the gantry. The piston rod end of the lifting cylinder is fixed with a lifting plate, and a punching die is rotatably connected to the lifting plate by a fixed shaft. A grinding assembly is arranged on the side wall in the middle of the punching die. The motor is in transmission connection with the punching die. A vertically arranged rotating shaft is rotatably connected to the base, and the lifting plate is in transmission connection with the rotating shaft. The rotating shaft passes through and is fixedly connected to the center of a turntable. A plurality of punching stations are fixedly arranged on the turntable at equal intervals along the circumferential direction. A clamping assembly for fixing the connecting belt plate is arranged on the punching station, and a bottom die corresponding to the punching die is arranged on the punching station. This punching device for aircraft connecting belt plates realizes the automatic cycle of punching, hole grinding, and feeding of the connecting belt plate, greatly improving the work efficiency and reducing the labor intensity.

Description

Technical Field

[0001] The present invention relates to the field of aircraft accessory processing equipment, and specifically to a punching device for aircraft connecting belt plates. Background Art

[0002] During the production of aircraft connecting belt plates, it is necessary to punch the preliminarily processed plate parts so that their surfaces have connecting holes for connection and fixation, and then processes such as grinding and polishing are performed on the formed connecting belt plates. Therefore, the existing processing procedures are relatively cumbersome and the production efficiency is not high. In view of this, we propose a punching device for aircraft connecting belt plates. Summary of the Invention

[0003] The purpose of the present invention is to provide a punching device for aircraft connecting belt plates to solve the problems raised in the above background art. To achieve the above purpose, the present invention provides the following technical solution: A punching device for aircraft connecting belt plates, including a gantry fixed on a base. A motor and a lifting cylinder are fixed on the crossbeam of the gantry. The piston rod end of the lifting cylinder is fixed with a lifting plate, and a punching die is rotatably connected to the lifting plate by a fixed shaft. A grinding assembly is arranged on the side wall of the middle part of the punching die. The motor is in transmission connection with the punching die. A vertically arranged rotating shaft is rotatably connected to the base, and the lifting plate is in transmission connection with the rotating shaft. The rotating shaft passes through and is fixedly connected to the center of a turntable. A plurality of punching platforms are fixedly arranged at equal intervals along the circumferential direction on the turntable, and a clamping assembly for fixing the connecting belt plate is arranged on the punching platform. A bottom die corresponding to the punching die is arranged on the punching platform.

[0004] Preferably, a multi-faceted rod is coaxially and fixedly connected to the upper end of the punching die. A tube shaft is sleeved and slidably connected to the upper end of the multi-faceted rod. The tube shaft is rotatably connected to the crossbeam of the gantry, and the motor is in transmission connection with the tube shaft. A touch switch one is fixed on the gantry, and the lifting plate is in touch contact with the touch switch one.

[0005] Preferably, the grinding assembly includes a groove opened on the peripheral wall of the punching die, and the direction of the groove is parallel to the central axis direction of the punching die. A grinding block is slidably connected inside the groove, and the grinding block is connected to the inner wall of the groove through a fourth spring. Sliding grooves are opened on the upper and lower side walls of the groove, and sliders are slidably connected inside the sliding grooves. The two sliders are respectively fixedly connected to the upper and lower ends of the grinding block. The side contour of the grinding block facing the outside of the groove is an isosceles trapezoid.

[0006] Preferably, a suspension rod is fixed on the crossbeam of the gantry, and a ratchet wheel is rotatably connected to the lower end of the suspension rod. A third rack is fixed to one end of the lifting plate, and the third rack is meshed with the outer ring of the ratchet wheel. The inner ring of the ratchet wheel is in transmission connection with the upper end of the rotating shaft through a bevel gear set.

[0007] Preferably, the clamping assembly includes slideways two symmetrically opened at both ends of the upper surface of the stamping table, and a second rack is slidably connected in the slideways two. A pressing plate is fixed to the upper end of the second rack. Two slideways one are opened at the bottom surface of the stamping table. The two slideways one and the two slideways two are arranged in one-to-one correspondence. A first rack is slidably connected in the slideway one. The upper end of the first rack is connected to the upper end of the slideway one through a third spring. A top block is fixed to the lower end of the first rack. The slideway one is communicated with the corresponding slideway two through a channel, and the channel is opened in the stamping table. A first gear is rotatably connected to the channel by a fixed shaft, and the first gear is meshed with both the first rack and the second rack at the same time.

[0008] Preferably, two brackets are fixed on the base, and the two brackets are located directly below the lifting plate. A gap is left between the two brackets. The upper ends of the two sides of the brackets are of arc surface structure. When the turntable drives the stamping table to rotate directly above the two brackets, the upper ends of the two brackets correspond to and abut against the two top blocks at the bottom of the stamping table.

[0009] Preferably, a through hole is opened in the middle of the stamping table, and the bottom die is arranged in the through hole. When the stamping table is directly below the lifting plate, the punching die and the through hole on the stamping table share the same central axis. The two pressing plates are symmetrically located on both sides above the through hole.

[0010] Preferably, the bottom die is symmetrically composed of two semi-dies with the same structure, and the cross-section of the semi-die is semi-circular. When the two semi-dies are joined together, their central axes coincide and are shared. A sliding rod is vertically fixed to the outer arc surface of the semi-die, and the end of the sliding rod away from the semi-die is of wedge structure, and the wedge surface faces downward. A slideway three corresponding to the sliding rod is opened on the inner side wall of the through hole, and the sliding rod is inserted and slidably connected in the corresponding slideway three. The semi-die is connected to the inner wall of the through hole through a second spring.

[0011] Preferably, two slideways four are opened on the bottom surface of the stamping table, and the two slideways four and the two slideways three are arranged in one-to-one correspondence, and the slideway four is perpendicular and communicated with the corresponding slideway three. A U-shaped frame is arranged at the bottom of the stamping table, and the two ends of the U-shaped frame are respectively inserted and slidably connected in the two slideways four. The U-shaped frame is connected to the bottom surface of the stamping table through a first spring. The U-shaped frame can pass through the gap between the two brackets. The end of the U-shaped frame located in the slideway four is of wedge structure, and the wedge surface faces the through hole.

[0012] Preferably, a convex block is rotatably connected to the middle of the U-shaped frame by a fixed shaft, and the upper end of the convex block is of spherical structure or conical structure. The convex block and the bottom die share the same central axis. A touch switch two is fixed on one of the brackets, and the U-shaped frame abuts against the touch switch two.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In the present invention, a punching die is driven by a lifting cylinder to punch a connecting belt plate on a punching table of a bracket, and after punching, a motor is started to drive the punching die to rotate, so that the punching die drives a grinding assembly to grind the hole, and after grinding is completed, the turntable is driven to rotate for feeding. In this way, the punching, hole grinding, and feeding of the connecting belt plate are automatically cycled, greatly improving the working efficiency and reducing the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic cross-sectional structure diagram of the general assembly of the present invention Figure 1 ;

[0016] Figure 2 is a schematic cross-sectional structure diagram of the general assembly of the present invention Figure 2 ;

[0017] Figure 3 is a schematic cross-sectional structure diagram of the general assembly of the present invention Figure 3 ;

[0018] Figure 4 is a schematic cross-sectional structure diagram of the general assembly of the present invention Figure 4 ;

[0019] Figure 5 is Figure 4 an enlarged schematic structural diagram of part A in

[0020] Figure 6 is Figure 5 an enlarged schematic structural diagram of part B in

[0021] Figure 7 is a side view of the upper end structure of the bracket in the present invention;

[0022] Figure 8 is a top view of the punching table structure in the present invention.

[0023] In the figure: 1, base; 2, gantry; 3, rotating shaft; 4, turntable; 5, punching table; 6, suspension rod; 7, ratchet; 8, bevel gear set; 9, lifting cylinder; 10, lifting plate; 11, motor; 12, pipe shaft; 13, punching die; 14, bracket; 15, touch switch one; 16, touch switch two; 17, multi-faceted rod; 18, spring one; 19, top block; 20, rack one; 21, gear one; 22, rack two; 23, pressing plate; 24, bottom die; 25, through hole; 26, slideway two; 27, channel; 28, slideway one; 29, slideway three; 30, sliding rod; 31, spring two; 32, slideway four; 33, spring three; 34, groove; 35, grinding block; 36, spring four; 37, chute; 38, slider; 39, convex block; 40, U-shaped frame; 41, rack three. DETAILED DESCRIPTION OF THE INVENTION

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 to 8 , the present invention provides a technical solution: a punching device for an aircraft connecting belt plate, including a gantry 2 fixed on a base 1, a motor 11 and a lifting cylinder 9 are fixed on the cross beam of the gantry 2, the piston rod end of the lifting cylinder 9 is fixed with a lifting plate 10, and a punching die 13 is rotatably connected to the lifting plate 10 through a fixed shaft, and a grinding assembly is arranged on the side wall of the middle part of the punching die 13, the motor 11 is in transmission connection with the punching die 13, a vertically arranged rotating shaft 3 is rotatably connected to the base 1 through a fixed shaft, and the lifting plate 10 is in transmission connection with the rotating shaft 3, the rotating shaft 3 penetrates and is fixedly connected to the center of a turntable 4, a plurality of punching platforms 5 are fixedly arranged on the turntable 4 at equal intervals along the circumferential direction, and a clamping assembly for fixing the connecting belt plate is arranged on the punching platform 5, and a bottom die 24 corresponding to the punching die 13 is arranged on the punching platform 5.

[0026] In this embodiment, a multi-faceted rod 17 is coaxially and fixedly connected to the upper end of the punching die 13, a tube shaft 12 is sleeved and slidably connected to the upper end of the multi-faceted rod 17, the tube shaft 12 is rotatably connected to the cross beam of the gantry 2, and the motor 11 is in transmission connection with the tube shaft 12, a touch switch 15 is fixed on the gantry 2, and the lifting plate 10 is in touch contact with the touch switch 15.

[0027] In this embodiment, the grinding assembly includes a groove 34 opened on the peripheral wall of the punching die 13, and the direction of the groove 34 is parallel to the central axis direction of the punching die 13, a grinding block 35 is slidably connected inside the groove 34, and the grinding block 35 is connected to the inner wall of the groove 34 through a spring 436, sliding grooves 37 are opened on the upper and lower side walls of the groove 34, sliders 38 are slidably connected in the sliding grooves 37, and the two sliders 38 are respectively fixedly connected to the upper and lower ends of the grinding block 35, and the side contour of the grinding block 35 facing the outside of the groove 34 is an isosceles trapezoid.

[0028] In this embodiment, a suspension rod 6 is fixed on the cross beam of the gantry 2, and a ratchet wheel 7 is rotatably connected to the lower end of the suspension rod 6, one end of the lifting plate 10 is fixed with a rack 41, the rack 41 is meshed with the outer ring of the ratchet wheel 7, and the inner ring of the ratchet wheel 7 is in transmission connection with the upper end of the rotating shaft 3 through a bevel gear set 8.

[0029] In this embodiment, the clamping assembly includes slideways two 26 symmetrically formed at both ends of the upper surface of the stamping table 5. A rack two 22 is slidably connected in the slideways two 26. A pressing plate 23 is fixed to the upper end of the rack two 22. Two slideways one 28 are formed at the bottom surface of the stamping table 5. The two slideways one 28 are arranged in one-to-one correspondence with the two slideways two 26. A rack one 20 is slidably connected in the slideways one 28. The upper end of the rack one 20 is connected to the upper end of the slideways one 28 through a spring three 33. A top block 19 is fixed to the lower end of the rack one 20. The slideways one 28 are communicated with the corresponding slideways two 26 through a channel 27, and the channel 27 is formed in the stamping table 5. A gear one 21 is rotatably connected about a fixed axis in the channel 27, and the gear one 21 is simultaneously meshed with the rack one 20 and the rack two 22.

[0030] In this embodiment, two brackets 14 are fixed to the base 1, and the two brackets 14 are located directly below the lifting plate 10. A gap is left between the two brackets 14. The two sides of the upper end of the bracket 14 are of an arc surface structure. When the turntable 4 drives the stamping table 5 to rotate to directly above the two brackets 14, the upper ends of the two brackets 14 correspond to and abut against the two top blocks 19 at the bottom of the stamping table 5.

[0031] In this embodiment, a through hole 25 is formed in the middle of the stamping table 5, and the bottom die 24 is arranged in the through hole 25. When the stamping table 5 is located directly below the lifting plate 10, the punching die 13 and the through hole 25 in the stamping table 5 share the same central axis. The two pressing plates 23 are symmetrically located on both sides above the through hole 25.

[0032] In this embodiment, the bottom die 24 is symmetrically composed of two semi-dies with the same structure, and the cross-section of the semi-die is semi-circular. When the two semi-dies are joined together, their central axes coincide and are shared. A sliding rod 30 is vertically fixed to the outer arc surface of the semi-die, and the end of the sliding rod 30 away from the semi-die is of a wedge-shaped structure with the wedge surface facing downwards. A slideway three 29 corresponding to the sliding rod 30 is formed on the inner side wall of the through hole 25, and the sliding rod 30 is inserted into and slidably connected in the corresponding slideway three 29. The semi-die is connected to the inner wall of the through hole 25 through a spring two 31.

[0033] In this embodiment, two slideways four 32 are formed in the bottom surface of the stamping table 5, and the two slideways four 32 are arranged in one-to-one correspondence with the two slideways three 29. The slideway four 32 is vertically and communicatively arranged with the corresponding slideway three 29. A U-shaped frame 40 is arranged at the bottom of the stamping table 5, and the two ends of the U-shaped frame 40 are respectively inserted into and slidably connected in the two slideways four 32. The U-shaped frame 40 is connected to the bottom surface of the stamping table 5 through a first spring 18. The U-shaped frame 40 can pass through the gap between the two brackets 14. The end of the U-shaped frame 40 located in the slideway four 32 is a wedge-shaped structure, and the wedge surface faces the through hole 25. A convex block 39 is rotatably connected to the middle of the U-shaped frame 40 through a fixed shaft, and the upper end of the convex block 39 is a spherical structure or a conical structure. The convex block 39 and the bottom die 24 share the same central axis. A second touch switch 16 is fixed on one of the brackets 14, and the U-shaped frame 40 is in abutting contact with the second touch switch 16.

[0034] The working principle and advantages of the present invention: When the aircraft connecting belt plate punching device is in use, the working process is as follows:

[0035] As Figures 1 to 8As shown, the lifting cylinder 9 is controlled by the controller to work, so that the lifting cylinder 9 drives the lifting plate 10 to move downward, thereby causing the lifting plate 10 to drive the punching die 13 to move downward. While the lifting plate 10 moves downward, it also drives the third rack 41 to move downward. After the third rack 41 moves downward and meshes with the outer ring of the ratchet wheel 7, it cannot drive the inner ring to rotate through the outer ring of the ratchet wheel 7, thus cannot drive the rotating shaft 3 to rotate. In this way, it is ensured that the turntable 4 remains stationary when punching the connecting belt plate. After the punching die 13 moves downward, punching processing is carried out on the punching position at the bottom die 24, and the scrap cut off is discharged from the lower end of the bottom die 24. The upper end of the convex block 39 is a spherical structure or a conical structure, which avoids the scrap from falling on the convex block 39, thus ensuring the normal discharge of the scrap and maintaining normal processing operations. After the punching die 13 completes punching, the lifting plate 10 continues to drive the punching die 13 to move downward. When the lower end of the punching die 13 abuts against the upper end of the convex block 39, the lifting plate 10 just abuts against the first touch switch 15, and the grinding block 35 is about to enter the punched hole. The first touch switch 15 transmits the touch signal of the lifting plate 10 to the controller, and the controller starts the motor 11 to work, so that the motor 11 drives the multi-faceted rod 17 to rotate through the tube shaft 12, thereby causing the multi-faceted rod 17 to drive the punching die 13 and the grinding block 35 thereon to rotate. The lifting plate 10 drives the punching die 13 to continue to move downward, so that the punching die 13 exerts a downward pressure on the convex block 39, thereby causing the convex block 39 to drive the U-shaped frame 40 to move downward and stretch the first spring 18, so that the first spring 18 obtains a restoring force, so that the upper end of the U-shaped frame 40 separates from the wedge end of the sliding rod 30, and thus under the action of the second spring 31, the two half dies move away from each other. This is to avoid frictional damage to the inner wall of the bottom die 24 by the grinding block 35. While the punching die 13 drives the convex block 39 to move downward, it also drives the grinding block 35 to pass through the hole, so that the side contour of the grinding block 35 outside the groove 34 grinds the upper and lower ports and the inner wall of the hole, realizing automatic grinding of the hole after punching, saving time and effort and simplifying the process. When the U-shaped frame 40 abuts against the second touch switch 16, the second touch switch 16 transmits the touch signal of the U-shaped frame 40 to the controller, and the controller controls the lifting cylinder 9 to contract the piston rod and reset, so that the lifting plate 10 drives the punching die 13 to move upward and reset. During the upward movement of the punching die 13, the grinding block 35 grinds the hole again. After the punching die 13 moves upward, under the restoring force of the first spring 18, it drives the U-shaped frame 40 to move upward. When the upper wedge surface of the U-shaped frame 40 abuts against the corresponding wedge surface of the sliding rod 30, the sliding rod 30 pushes the half die closer to the center of the through hole 25 and stretches the second spring 31, so that the bottom die 24 resets. When the lifting plate 10 moves upward and abuts against the first touch switch 15 again, and the grinding block 35 just leaves the ground hole, the first touch switch 15 transmits the touch signal of the lifting plate 10 to the controller, and the controller stops the motor 11 from working, so that the punching die 13 stops rotating, saving energy. When the lower end of the punching die 13 just leaves the ground hole, the third rack 41 just meshes with the outer ring of the ratchet wheel 7.At this time, when the rack three 41 continues to move upward, it drives the rotation of the outer ring of the ratchet wheel 7, enabling the outer ring of the ratchet wheel 7 to drive the inner ring to rotate through the pawl. As a result, the inner ring of the ratchet wheel 7 drives the rotating shaft 3 to rotate through the bevel gear set 8, and the rotating shaft 3 drives the turntable 4 and each punching station 5 thereon to rotate. When the punching station 5 after punching leaves the support 14, under the action of the spring three 33, the rack one 20 drives the top block 19 to move downward, so that the rack one 20 drives the rack two 22 and the pressing plate 23 thereon to move upward through the gear one 21, thereby releasing the fixation of the punched connecting belt plate, in order to remove the punched connecting belt plate from the punching station 5 and replace it with the connecting belt plate to be punched. At the same time, the turntable 4 also rotates the next punching station 5 loaded with the connecting belt plate to be punched to the support 14. When the top block 19 contacts the arc surface structure at the upper end of the support 14, the top block 19 receives the reaction force from the support 14 and drives the rack one 20 to move upward while compressing the spring three 33, so that the spring three 33 obtains a restoring force. When the rack one 20 moves upward, it drives the rack two 22 and the pressing plate 23 at its upper end to move downward through the gear one 21. When the top block 19 is located directly above the support 14, the pressing plate 23 just tightly presses and fixes the connecting belt plate, and the bottom die 24 is just located directly below the punching die 13. At the same time, the lifting cylinder 9 drives the lifting plate 10 to complete the reset. The controller controls the lifting cylinder 9 to extend the piston rod again and drives the punching die 13 to move downward through the lifting plate 10. In this way, it circulates repeatedly to realize the automatic circulation of punching, grinding and feeding of the connecting belt plate, greatly improving the work efficiency and reducing the labor intensity. It only needs to place the connecting belt plate to be processed on the empty punching station 5.

[0036] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0037] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An aircraft connecting plate punching device, comprising a gantry (2) fixed on a base (1), characterized in that: A motor (11) and a lifting cylinder (9) are fixed on the crossbeam of the gantry (2); a lifting plate (10) is fixed on the piston rod end of the lifting cylinder (9); a die (13) is rotatably connected to the lifting plate (10); a grinding assembly is arranged on the middle side wall of the die (13); the motor (11) is connected to the die (13) in a transmission manner; a rotating shaft (3) arranged in a vertical direction is rotatably connected to the base (1); the lifting plate (10) is connected to the rotating shaft (3) in a transmission manner; the rotating shaft (3) passes through and is fixedly connected to the center of the turntable (4); a plurality of punching tables (5) are fixedly fixed along the circumference of the turntable (4) at equal intervals; a clamping assembly for fixing the connecting strip is arranged on the punching table (5); and a bottom die (24) corresponding to the die (13) is arranged on the punching table (5); The upper end of the punching die (13) is coaxially fixedly connected to a polygonal rod (17), the upper end of the polygonal rod (17) is sleeved and slidably connected to a tube shaft (12), the tube shaft (12) is fixedly rotatably connected to a crossbeam of a gantry (2), and a motor (11) is transmission-connected to the tube shaft (12), a touch switch (15) is fixed on the gantry (2), and the lifting plate (10) is in contact with the touch switch (15); The clamping assembly comprises two slideways (26) symmetrically arranged at both ends of the upper surface of the punching platform (5), and two racks (22) are slidably connected in the two slideways (26), a pressure plate (23) is fixed to the upper end of the two racks (22), two brackets (14) are fixed on the base (1), a through hole (25) is arranged in the middle of the punching platform (5), and a bottom die (24) is arranged in the through hole (25), when the punching platform (5) is located directly below the lifting plate (10), the punching die (13) and the through hole (25) on the punching platform (5) share the same central axis, and the two The pressing plate (23) is symmetrically located on both sides above the through hole (25), the bottom mold (24) is symmetrically composed of two half molds with the same structure, and the cross section of the half mold is semi-circular. When the two half molds are matched, the central axis thereof coincides with the through hole (25) and is shared. The outer arc surface of the half mold is vertically fixedly connected with a slide rod (30), and the end of the slide rod (30) away from the half mold is a wedge-shaped structure, and the wedge-shaped surface is arranged downward. A slideway three (29) corresponding to the slide rod (30) is opened on the inner side wall of the through hole (25), and the slide rod (30) is inserted into and slidably connected to the corresponding slideway three (29) ), the half mold is connected to the inner wall of the through hole (25) through a spring second (31), the bottom surface of the punching table (5) is provided with two slideways four (32), and the two slideways four (32) are arranged in a one-to-one correspondence with the two slideways three (29), and the slideway four (32) is arranged vertically and in communication with the corresponding slideway three (29), the bottom of the punching table (5) is provided with a U-shaped frame (40), and the two ends of the U-shaped frame (40) are respectively inserted into and slidably connected to the two slideways four (32), and the U-shaped frame (40) is connected to the bottom surface of the punching table (5) through a spring first (18). The U-shaped frame (40) is connected to the bottom mold (24), the U-shaped frame (40) can pass through the gap between the two brackets (14), the end of the U-shaped frame (40) located in the slideway four (32) is a wedge-shaped structure, and the wedge-shaped surface is arranged to face the through hole (25), the middle part of the U-shaped frame (40) is connected to a convex block (39) for fixed axis rotation, and the upper end of the convex block (39) is a spherical structure or a conical structure, the convex block (39) and the bottom mold (24) share the same central axis, one of the brackets (14) is fixed with a touch switch two (16), and the U-shaped frame (40) is in buckling contact with the touch switch two (16).

2. The aircraft connecting strip punching device according to claim 1, characterized in that: The grinding assembly comprises a groove (34) formed on the peripheral wall of the punch (13), and the direction of the groove (34) is arranged parallel to the central axis direction of the punch (13); a grinding block (35) is slidably connected inside the groove (34), and the grinding block (35) is connected to the inner wall of the groove (34) through a spring (36); upper and lower side walls of the groove (34) are formed with a slide groove (37), and a slider (38) is slidably connected inside the slide groove (37); two sliders (38) are respectively fixedly connected to the upper and lower ends of the grinding block (35); and the side contour of the grinding block (35) toward the outside of the groove (34) is an isosceles trapezoid.

3. The aircraft connecting strip punching device according to claim 1, characterized in that: A suspension rod (6) is fixed on the crossbeam of the gantry (2), and a ratchet wheel (7) is rotatably connected to the lower end of the suspension rod (6). A rack three (41) is fixed to one end of the lifting plate (10), and the rack three (41) is meshingly connected to the outer ring of the ratchet wheel (7). The inner ring of the ratchet wheel (7) is transmission-connected to the upper end of the rotating shaft (3) via a bevel gear set (8).

4. The aircraft connecting strip punching device according to claim 1, characterized in that: The bottom surface of the punching table (5) is provided with two slideways 1 (28), and the two slideways 1 (28) are arranged in a one-to-one correspondence with the two slideways 2 (26). A rack 1 (20) is slidably connected in the slideway 1 (28), and the upper end of the rack 1 (20) is connected to the upper end of the slideway 1 (28) through a spring 3 (33). A top block (19) is fixed to the lower end of the rack 1 (20). The slideway 1 (28) is connected to the corresponding slideway 2 (26) through a channel (27), and the channel (27) is provided in the punching table (5). A gear 1 (21) is rotatably connected to the fixed axis in the channel (27), and the gear 1 (21) is meshedly connected to the rack 1 (20) and the rack 2 (22) at the same time.

5. The aircraft connecting strip punching device according to claim 4, characterized in that: The two brackets (14) are located directly below the lifting plate (10), with a gap between the two brackets (14). Both sides of the upper ends of the brackets (14) are arc surface structures, and when the turntable (4) drives the punching table (5) to rotate to directly above the two brackets (14), the upper ends of the two brackets (14) correspond to and come into contact with the two top blocks (19) at the bottom of the punching table (5).

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