Punching mechanism for aviation rivet machining

Abstract

A punching mechanism for aviation rivet machining relates to the field of rivet machining and comprises a punching assembly and a forming assembly, the forming assembly comprises a transmission track and a forming groove unit, a track support is arranged at the bottom of the transmission track, the forming groove unit comprises a forming groove formed in the transmission track, and an electromagnetic heating coil is arranged on the inner wall of the forming groove; the punching assembly is arranged above the conveying rail and comprises a punching rod and a hydraulic rod, the top of the punching rod is connected with a power shaft of the hydraulic rod, and the bottom of the hydraulic rod is connected with the rail support. Rivet cap raw materials in the forming groove are conveyed to the punching assembly through the conveying rail to be subjected to integrated punching forming, the production efficiency of rivet caps is improved, the rivet cap raw materials in the forming groove are heated through the electromagnetic heating coil in the punching process so as to eliminate metal internal stress, reduce punching resistance in the punching process and prevent metal fatigue, and the production efficiency of the rivet caps is improved. And the quality of the rivet cap is ensured.

Description

Technical Field

[0001] This invention relates to the field of rivet processing technology, and more particularly to a punching mechanism for processing aerospace rivets. Background Technology

[0002] Aerospace riveting is a critical process in aircraft manufacturing, primarily used to connect structural components such as fuselage skin and frames. It must meet stringent requirements for high strength, lightweight design, and corrosion resistance. Rivet materials are typically aluminum alloys, titanium alloys, or high-strength stainless steel. The shank and head are shaped through cold forging or hot working processes to ensure structural consistency. Strict control over dimensional accuracy and surface finish is essential during processing to avoid stress concentration. Surface treatments often involve plating, anodizing, or spraying with anti-corrosion coatings to withstand the extreme temperature and humidity changes at high altitudes. Quality inspection is paramount, requiring non-destructive methods such as X-ray inspection and ultrasonic testing to identify internal defects, and tensile and shear strength tests according to aerospace standards. With the increasing use of composite materials, rivet designs are trending towards irregular shapes and miniaturization. Processing technology is also upgrading towards automated riveting equipment and intelligent process monitoring to improve assembly efficiency and reduce human error, meeting the extreme demands for reliability and safety in modern aerospace equipment.

[0003] As aircraft fuselage manufacturing trends towards higher precision, some sheet metal parts on aircraft require high-precision rivet components, posing a severe challenge to the punching process of rivet heads. Currently, most rivet head punching equipment on the market uses cold heading punching technology. However, this technology directly punches metal at room temperature, which can easily lead to metal fatigue and internal cracks, affecting the quality of the rivet head. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] To achieve the above objectives, the present invention proposes a punching mechanism for processing aerospace rivets, comprising a punching assembly and a forming assembly. The punching assembly is used to punch and form the raw material metal in the forming assembly. The forming assembly includes a transmission track and a forming groove unit. The bottom of the transmission track is provided with a track support. The forming groove unit includes a forming groove disposed on the transmission track. An electromagnetic heating coil is disposed on the inner wall of the forming groove. The punching assembly is disposed above the transmission track. The punching assembly includes a punching rod and a hydraulic rod. The top of the punching rod is connected to the power shaft of the hydraulic rod, and the bottom of the hydraulic rod is connected to the track support.

[0006] Furthermore, multiple forming grooves are arranged at equal intervals, and the inner wall of the forming groove is provided with an inner lining. The inner lining is made of alloy tool steel, and a graphite heating seat is provided between the electromagnetic heating coil and the inner lining.

[0007] Furthermore, a directional electric heating unit is provided below the punching rod. The directional electric heating unit includes a positioning push rod and a power supply unit. The positioning push rod is mounted on the track support and is located vertically below the punching rod. The power supply unit is electrically connected to both the positioning push rod and the punching rod.

[0008] Furthermore, the power supply unit includes a first brush and a second brush, wherein the first brush slides in contact with the punching rod, and the second brush is in electrical contact with the positioning push rod.

[0009] Furthermore, a pin is provided at the top of the positioning push rod, a cylinder is provided at the bottom of the positioning push rod, an insulating sleeve is provided on the outer wall of the pin, and a pin brush is provided on the side of the pin that contacts the second brush.

[0010] Furthermore, a punching support is provided on the power shaft of the hydraulic rod, the bottom end of the punching rod is a pointed tip, and an impact unit is provided on the top of the punching rod. The impact unit is mounted on the punching support and is used to provide reciprocating impact force to the punching rod. The impact unit includes an impact seat, an electromagnet, and an impact plate. The impact seat is mounted on the punching support, the electromagnet is slidably mounted inside the impact seat, and a compression spring is provided on the top of the electromagnet. The impact plate is mounted on the bottom of the impact seat and is magnetic. The punching rod slides through the bottom of the impact seat, and the impact plate is connected to the top of the punching rod. A return spring is provided on the bottom of the impact plate, and a contact seat is provided on the side of the electromagnet opposite to the impact plate.

[0011] Furthermore, a flange groove is provided at the top of the forming groove, and a flange pressure plate that is compatible with the flange groove is slidably mounted on the punching rod. Sliding seats are provided on both sides of the flange pressure plate, and the sliding seats are sleeved on the hydraulic rod. A sliding seat spring is provided between the sliding seat and the hydraulic rod. Positioning units are provided at the bottom of the forming groove and on the transmission track. The positioning units are used for accurate positioning during the forming groove and punching process.

[0012] Furthermore, the transmission track is equipped with a feeding assembly and a discharging assembly. The feeding assembly includes a feeding track, a steering seat, and a pusher rod. The feeding track is located at the inlet end of the steering seat, and the discharging end of the steering seat is equipped with a discharging nozzle, which corresponds to the forming groove. The pusher rod is located vertically above the discharging nozzle, and a push block is provided on the power shaft of the pusher rod. The discharging assembly includes a blowing pump and an ejector cylinder. The blowing pump is located on one side of the transmission track, and the discharging track is located on the side of the transmission track opposite to the blowing pump. The ejector cylinder is located at the bottom of the discharging bracket, and the ejector cylinder corresponds to the bottom of the forming groove.

[0013] Furthermore, the track support is provided with a transmission drive unit for driving the transmission track to rotate. The transmission drive unit includes a drive motor and a drive gear. The drive motor is mounted on the track support, and a drive gear is mounted on the drive shaft of the drive motor. The drive gear is mounted on the inner side of the transmission track, and the drive gear meshes with the drive gear.

[0014] Beneficial effects: This invention improves the production efficiency of rivet heads by placing the rivet head material in a forming groove and then conveying it to the punching assembly via a transmission track. During the punching process, the rivet head material in the forming groove is heated by an electromagnetic heating coil to eliminate internal metal stress, reduce punching resistance, prevent metal fatigue, and ensure the quality of the rivet head.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of a punching mechanism for processing aviation rivets according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of a punching mechanism for processing aircraft rivets according to an embodiment of the present invention; Figure 3 This is a top view of a punching mechanism for processing aircraft rivets according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a punching mechanism for processing aircraft rivets according to an embodiment of the present invention from another perspective. Figure 5 A cross-sectional view of the impact unit in a punching mechanism for aerospace rivet processing according to an embodiment of the present invention; Figure 6 This is a cross-sectional view of a directional electric heating unit in a punching mechanism for aerospace riveting according to an embodiment of the present invention; Figure 7 A cross-sectional view of the feeding assembly in the impact unit of a punching mechanism for aerospace riveting according to an embodiment of the present invention; Figure 8 A cross-sectional view of a forming component in a punching mechanism for processing aerospace rivets according to an embodiment of the present invention; Figure 9A schematic diagram of the punching mechanism for processing aerospace rivets according to an embodiment of the present invention, during the punching process; Figure 10 This is a schematic diagram of the full-punching principle of a punching mechanism for processing aerospace rivets according to an embodiment of the present invention.

[0017] As shown in the figure: 1. Feeding assembly; 11. Feeding track; 12. Steering seat; 13. Discharge nozzle; 14. Push rod; 141. Push block; 2. Punching assembly; 21. Impact unit; 211. Impact seat; 212. Compression spring; 213. Electromagnet; 214. Impact plate; 215. Return spring; 216. Electrical connector; 22. Punching rod; 221. Flange pressure plate; 222. Sliding seat; 223. Sliding seat spring; 23. Hydraulic rod; 231. Punching support; 24. Power supply unit; 241. First brush; 242. Second brush; 3. Discharge assembly; 31. Blowing pump; 32. Discharge track; 33. Discharge bracket; 34. Ejector cylinder; 4. Molding assembly; 41. Transfer track; 42. Track support; 43. Molding groove unit; 431. Flange groove; 432. Electromagnetic heating coil; 433. Graphite heating seat; 434. Liner; 435. Sliding sleeve; 436. Positioning unit; 437. Molding groove; 44. Transfer drive unit; 441. Drive gear; 442. Drive gear plate; 443. Drive motor; 45. Directional electric heating unit; 451. Positioning push rod; 452. Cylinder; 453. Ejector pin; 454. Insulating jacket; 455. Ejector pin brush; 5. Mounting base; 6. Rivet cap product. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] The punching mechanism for aerospace rivet processing according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0020] like Figures 2-4 As shown, the punching mechanism for processing aviation rivets provided in this embodiment of the invention includes a punching component 2 and a forming component 4, wherein the punching component 2 is used to punch and form the raw material metal in the forming component 4.

[0021] The molding component 4 includes a transfer track 41 and a molding groove unit 43. The bottom of the transfer track 41 is provided with a track support 42, and the bottom of the track support 42 is provided with a mounting base 5. The molding groove unit 43 includes a molding groove 437 disposed on the transfer track 41, and an electromagnetic heating coil 432 is disposed on the inner wall of the molding groove 437.

[0022] The punching assembly 2 is positioned above the transmission track 41. The punching assembly 2 includes a punching rod 22 and a hydraulic rod 23. The top of the punching rod 22 is connected to the power shaft of the hydraulic rod 23, and the bottom of the hydraulic rod 23 is connected to the track support 42.

[0023] Specifically, when processing the rivet head, the rivet head material (which can be a segmented metal block, requiring its size to fall completely at the bottom of the forming groove 437) is first placed in the forming groove 437. The electromagnetic heating coil 432 in the forming groove 437 electromagnetically heats the rivet head material to eliminate internal stress in the metal, reduce punching resistance during the punching process, and prevent metal fatigue.

[0024] The transfer track 41 moves on the track support 42, causing the forming groove 437 to move below the punching assembly 2. Then, the transfer track 41 stops moving. Subsequently, the hydraulic rod 23 drives the punching rod 22 to move downward, thereby causing the punching rod 22 to squeeze the rivet head material in the forming groove 437 and vertically squeeze and pierce the middle part of the rivet head material. The outer wall of the rivet head material fills the inner wall of the forming groove 437, and the punching rod 22 fills the inner wall of the hole of the rivet head material, so that the rivet head material is integrally die-cast in the forming groove 437, improving the production efficiency of rivet heads.

[0025] Furthermore, the rivet head material is heated during the punching process, resulting in lower internal metal stress. This effectively reduces punching resistance and prevents metal fatigue, ensuring the quality of the rivet head.

[0026] In one embodiment of the present invention, such as Figure 2 and Figure 8 As shown, multiple forming grooves 437 are evenly spaced. The inner wall of the forming groove 437 is provided with a liner 434. The liner 434 is made of alloy tool steel, which has high hardness and effectively shapes the rivet head. A graphite heating seat 433 is provided between the electromagnetic heating coil 432 and the liner 434.

[0027] Specifically, in order to heat the outer wall of the rivet head and make it fit smoothly against the inner wall of the forming groove 437, a graphite heating seat 433 is provided between the electromagnetic heating coil 432 and the inner liner 434. The electromagnetic heating coil 432 generates eddy currents in the conductive graphite heating seat 433, the temperature of the graphite heating seat 433 rises, and then acts on the inner wall of the forming groove 437 to heat the outer wall of the rivet head, so that the hardness of the outer wall of the rivet head is reduced and it fits smoothly against the inner wall of the forming groove 437.

[0028] In one embodiment of the present invention, such as Figure 5 , Figure 6 and Figure 8As shown, a directional electric heating unit 45 is provided below the punching rod 22. The directional electric heating unit 45 includes a positioning push rod 451 and a power supply unit 24. The positioning push rod 451 is provided on the track support 42 and is located vertically below the punching rod 22. A sliding sleeve 435 adapted to the positioning push rod 451 is provided at the bottom of the forming groove 437. The power supply unit 24 is electrically connected to the positioning push rod 451 and the punching rod 22 respectively.

[0029] Specifically, in order to accelerate the punching speed of the rivet head, such as Figure 9 As shown, during the punching process, a strong current is applied between the punching rod 22 and the positioning push rod 451 through the power supply unit 24. The metal between the punching rod 22 and the positioning push rod 451 is heated by electricity and its temperature rises sharply. The metal in contact with the bottom of the punching rod 22 has the highest temperature. Therefore, during the process of the punching rod 22 pressing the metal downward, the metal in contact with the punching rod 22 has reduced hardness due to electric heating, which is more conducive to the punching speed in the middle of the rivet head.

[0030] In one embodiment of the present invention, such as Figure 5 and Figure 6 As shown, the power supply unit 24 includes a first brush 241 and a second brush 242, wherein the first brush 241 is in sliding contact with the punching rod 22, and the second brush 242 is in electrical contact with the positioning push rod 451.

[0031] Specifically, during the punching process, the first brush 241 slides in contact with the punching rod 22, ensuring that the punching rod 22 is always connected to the power supply during its up-and-down movement; similarly, the second brush 242 makes electrical contact with the positioning push rod 451, ensuring that the positioning push rod 451 is always connected to the power supply and guaranteeing the stability of the power supply.

[0032] In one embodiment of the present invention, such as Figure 6 As shown, a pin 453 is provided at the top of the positioning push rod 451, a cylinder 452 is provided at the bottom of the positioning push rod 451, an insulating sleeve 454 is provided on the outer wall of the pin 453, and a pin brush 455 is provided on the side of the pin 453 that contacts the second brush 242.

[0033] Specifically, during the punching process, in order to fix the bottom of the rivet head and make stable electrical contact with the positioning push rod 451, the cylinder 452 drives the positioning push rod 451 to press the bottom of the rivet head upward. The pin 453 at the top of the positioning push rod 451 pierces into the bottom of the rivet head, so that the bottom of the rivet head can be fixed and make stable electrical contact with the positioning push rod 451.

[0034] After the hole is fully punched, as Figure 10 As shown, the punching rod 22 will press the positioning push rod 451 downward to make the rivet head fully punched.

[0035] In one embodiment of the present invention, such as Figure 2 and Figure 5 As shown, a punching support 231 is provided on the power shaft of the hydraulic rod 23, the bottom end of the punching rod 22 is a pointed end, and an impact unit 21 is provided on the top of the punching rod 22. The impact unit 21 is provided on the punching support 231 and is used to provide reciprocating impact force to the punching rod 22.

[0036] The impact unit 21 includes an impact seat 211, an electromagnet 213, and an impact plate 214. The impact seat 211 is mounted on the punching support 231, the electromagnet 213 is slidably mounted inside the impact seat 211, and a compression spring 212 is mounted on the top of the electromagnet 213.

[0037] Impact plate 214 is located at the bottom of impact seat 211. Impact plate 214 is magnetic. Punching rod 22 slides through the bottom of impact seat 211 and impact plate 214 is connected to the top of punching rod 22. A return spring 215 is provided at the bottom of impact plate 214 so that punching rod 22 can move up and down during impact. Electromagnet 213 and the side opposite to impact plate 214 are provided with a grounding base 216.

[0038] Specifically, in order to enable rapid piercing of the rivet head during the punching process, the power base 216 on the impact plate 214 is connected to a power source. When the power base 216 at the bottom of the electromagnet 213 contacts the power base 216 on the impact plate 214, the electromagnet 213 is energized and generates the same magnetic poles as the impact plate 214. The electromagnet 213 is pushed upward by the magnetic force. During the upward movement, the electromagnet 213 compresses the compression spring. At the same time, the electromagnetic force of the electromagnet 213 disappears. After the electromagnet 213 moves upward to the highest point, it continues to move downward to hit the impact plate 214 and continues to bounce upward. This provides the impact plate 214 with reciprocating impact force, so that the punching rod 22 can punch the rivet head quickly up and down.

[0039] In one embodiment of the present invention, such as Figure 8 As shown, a flange groove 431 is provided on the top of the forming groove 437. A flange pressure plate 221 that is compatible with the flange groove 431 is slidably provided on the punching rod 22. Sliding seats 222 are provided on both sides of the flange pressure plate 221. The sliding seats 222 are sleeved on the hydraulic rod 23. A sliding seat spring 223 is provided between the sliding seat 222 and the hydraulic rod 23.

[0040] Specifically, in order to create a flange effect at the top of the rivet head, after the hydraulic rod 23 is compressed to its lowest point, as... Figure 10 As shown, the punch support 231 at the top of the hydraulic rod 23 compresses the flange pressure plate 221 into the flange groove 431, causing the rivet head material at the top of the forming groove 437 to be pressed into the flange shape of the rivet head.

[0041] In addition, after the rivet head is punched, the flange pressure plate 221 is supported by the slide spring 223 in the slide seat 222 and leaves the flange groove 431. When the slide seat 222 reaches the top of the forming groove 437, it stops at the limit. At this time, the hydraulic rod 23 can continue to drive the punching rod 22 to move upward, so that the punching rod 22 can easily get away from the inside of the rivet head.

[0042] In one embodiment of the present invention, such as Figure 8 As shown, positioning units 436 are provided at the bottom of the forming groove 437 and on the transmission track 41. The positioning units 436 are used to accurately position the forming groove 437 during the punching process. The positioning units 436 can be positioning magnets or position sensors, so that the forming groove 437 is accurately positioned after reaching the bottom of the feeding component 1, the bottom of the punching rod 22 and the bottom of the discharge component 3.

[0043] In one embodiment of the present invention, such as Figure 2 and Figure 7 As shown, a feeding assembly 1 and a discharging assembly 3 are provided on the transmission track 41. The feeding assembly 1 includes a feeding track 11, a steering seat 12, and a push rod 14. The feeding track 11 is located at the feeding end of the steering seat 12, and the discharging end of the steering seat 12 is provided with a discharging nozzle 13, which corresponds to the forming groove 437. The push rod 14 is located vertically above the discharging nozzle 13, and a push block 141 is provided on the power shaft of the push rod 14.

[0044] The discharge assembly 3 includes a blowing pump 31 and an ejector cylinder 34. The blowing pump 31 is located on one side of the transmission track 41. The side of the transmission track 41 opposite to the blowing pump 31 is provided with a discharge track 32. A discharge bracket 33 is provided at the bottom of the discharge track 32. The ejector cylinder 34 is located at the bottom of the discharge bracket 33 and corresponds to the bottom of the forming groove 437.

[0045] Specifically, during the process of feeding the rivet head material into the forming groove 437, the rivet head material is fed in from the feeding track 11 and sent into the steering seat 12. At this time, the push block 141 at the bottom of the push rod 14 squeezes the rivet head material downward to the discharge nozzle 13 and sends it into the forming groove 437 from the discharge nozzle 13.

[0046] After the rivet head is punched, the hydraulic rod 23 drives the punching rod 22 upward away from the forming groove 437, and at the same time the cylinder 452 drives the positioning push rod 451 downward away from the bottom of the forming groove 437. The forming groove 437 continues to rotate and move. When it moves above the ejection electric cylinder 34, the ejection electric cylinder 34 ejects the formed rivet head product 6 upward, and the blowing pump 31 blows the rivet head into the discharge bracket 33.

[0047] In one embodiment of the present invention, such as Figure 2 and Figure 3As shown, a transmission drive unit 44 for driving the transmission track 41 to rotate is provided on the track support 42. The transmission drive unit 44 includes a drive motor 443 and a drive gear 442. The drive motor 443 is provided on the track support 42, and a drive gear 441 is provided on the power shaft of the drive motor 443. The drive gear 442 is provided on the inner side of the transmission track 41, and the drive gear 441 and the drive gear 442 mesh with each other.

[0048] Specifically, during the rotation of the transmission track 41, the drive motor 443 drives the drive gear 441 to rotate. The drive gear 441 meshes with the drive gear disk 442 inside the transmission track 41, thereby driving the transmission track 41 to rotate on the track support 42.

[0049] To clearly illustrate the above embodiments, refer to Figures 1-10 The specific working principle of the punching mechanism for aerospace rivet processing of the present invention is as follows: The punching mechanism is first installed on the rivet head processing equipment via the mounting base 5. In the rivet head processing process, the initial step is the feeding stage. A segmented metal block that meets the size requirements (i.e., can completely fall to the bottom of the forming groove 437) is precisely fed in by the feeding track 11. After the rivet head material smoothly enters the steering seat 12, the push rod 14, with the push block 141 at the bottom, squeezes the rivet head material vertically downward until it reaches the discharge nozzle 13. Then, the rivet head material is sent from the discharge nozzle 13 into the interior of the forming groove 437.

[0050] Next, the electromagnetic heating coils 432 arranged around the inner side of the forming groove 437 begin to work, releasing heat that is evenly applied to the outer wall of the rivet head. As the temperature rises, the hardness of the outer wall of the rivet head gradually decreases, so that it can perfectly fit the inner wall of the forming groove 437 in the subsequent extrusion process, laying the foundation for the initial forming of the rivet head.

[0051] After the rivet head has completed its initial heating, the transmission track 41 rotates smoothly on the track support 42 under the drive of the drive motor 443. The transmission track 41 stops rotating immediately when the forming groove 437 precisely reaches the bottom of the punching rod 22, ready for the punching process. At this time, the hydraulic rod 23 responds quickly, moving the punching rod 22 downwards to punch the rivet head material in the forming groove 437.

[0052] During the punching process of the punching rod 22, the energizing base 216 on the impact plate 214 is connected to the power source. The moment the energizing base 216 at the bottom of the electromagnet 213 contacts the energizing base 216 on the impact plate 214, the electromagnet 213 is instantly energized, generating the same magnetic poles as the impact plate 214. Under the strong magnetic thrust, the electromagnet 213 quickly springs upward, during which the compression spring is strongly compressed. Simultaneously, the electromagnet 213 springs upward and the power is cut off, the electromagnetic force immediately disappears, and after reaching its highest point, it continues to fall downward under gravity, repeatedly impacting the impact plate 214. This cycle repeats continuously, providing a reciprocating impact force to the impact plate 214, enabling the punching rod 22 to achieve high-frequency, rapid up-and-down punching motions.

[0053] During the punching process, the power supply unit 24 plays a crucial role by applying a high-intensity current between the punching rod 22 and the positioning push rod 451. The punching rod 22 thereby heats the upper end of the rivet head material, while simultaneously, the cylinder 452 pushes the positioning push rod 451 upwards to precisely press the bottom end of the rivet head. The sharp pin 453 at the top of the positioning push rod 451 then pierces into the bottom of the rivet head, achieving a stable fixation. Furthermore, the positioning push rod 451 also energizes the bottom end of the rivet head material, creating a strong current loop at the punching location along the metal's centerline, thus efficiently heating the metal in that area.

[0054] In this design, the temperature of the metal between the punching rod 22 and the positioning push rod 451 rises sharply due to the electric heating effect. The metal in direct contact with the bottom of the punching rod 22 has the highest temperature. Therefore, as the punching rod 22 presses the metal downward, the hardness of this part of the metal is greatly reduced due to electric heating, which greatly reduces the difficulty of punching and makes it easier for the punching rod 22 to quickly and accurately penetrate the metal in the center of the rivet head.

[0055] After the punching operation of the rivet head is completed, such as Figure 10 As shown, the punching rod 22 does not stop moving but continues to apply pressure, pushing the positioning push rod 451 further downward to ensure that the rivet head is fully punched. Immediately afterwards, the punching support 231 at the top of the hydraulic rod 23 quickly exerts force, squeezing the flange pressure plate 221 and allowing it to smoothly enter the flange groove 431. During this process, the rivet head material at the top of the forming groove 437 is precisely pressed into the flange shape required for the rivet head.

[0056] After the punching of the rivet head and the flange forming process are successfully completed, the flange pressure plate 221, supported by the strong force of the slide spring 223 in the slide seat 222, slowly moves away from the flange groove 431. Once the slide seat 222 smoothly reaches above the forming groove 437, the limiting device in the slide seat 222 is activated, stopping its movement. At this time, the hydraulic rod 23 can continue to drive the punching rod 22 upwards, thereby helping the punching rod 22 to easily disengage from the inside of the rivet head.

[0057] After all the processing steps of the rivet head are completed, the hydraulic rod 23 drives the punching rod 22 to completely move upward away from the forming groove 437. At the same time, the cylinder 452 drives the positioning push rod 451 to move downward, causing it to disengage from the bottom of the forming groove 437. Subsequently, the forming groove 437 continues to rotate and move under the drive of the mechanical device. When it moves directly above the ejection cylinder 34, the ejection cylinder 34 exerts force instantaneously, steadily pushing the formed rivet head product 6 upward. Finally, the blowing pump 31 starts working, blowing the rivet head onto the discharge bracket 33. This completes the entire process of rivet head processing.

[0058] In summary, the punching mechanism for aerospace rivet processing in this embodiment of the invention improves the production efficiency of rivet heads by placing the rivet head material in a forming groove and then conveying it to the punching assembly via a transmission track for integral punching. During the punching process, the rivet head material in the forming groove is heated by an electromagnetic heating coil to eliminate internal metal stress, reduce punching resistance, prevent metal fatigue, and ensure the quality of the rivet head.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A punching mechanism for processing aircraft rivets, characterized in that, It includes a punching assembly (2) and a forming assembly (4), wherein the punching assembly (2) is used to punch and form the raw material metal in the forming assembly (4); The molding component (4) includes a transmission track (41) and a molding groove unit (43). The bottom of the transmission track (41) is provided with a track support (42), and the molding groove unit (43) includes a molding groove (437) provided on the transmission track (41). The inner wall of the molding groove (437) is provided with an electromagnetic heating coil (432). The punching assembly (2) is positioned above the transmission track (41). The punching assembly (2) includes a punching rod (22) and a hydraulic rod (23). The top of the punching rod (22) is connected to the power shaft of the hydraulic rod (23), and the bottom of the hydraulic rod (23) is connected to the track support (42).

2. The punching mechanism for processing aerospace rivets according to claim 1, characterized in that, Multiple forming grooves (437) are evenly spaced. The inner wall of the forming groove (437) is provided with a liner (434). The liner (434) is made of alloy tool steel. A graphite heating seat (433) is provided between the electromagnetic heating coil (432) and the liner (434).

3. The punching mechanism for processing aerospace rivets according to claim 1, characterized in that, A directional electric heating unit (45) is provided below the punching rod (22). The directional electric heating unit (45) includes a positioning push rod (451) and a power supply unit (24). The positioning push rod (451) is set on the track support (42) and is located vertically below the punching rod (22). The power supply unit (24) is electrically connected to the positioning push rod (451) and the punching rod (22).

4. The punching mechanism for processing aerospace rivets according to claim 3, characterized in that, The power supply unit (24) includes a first brush (241) and a second brush (242), wherein the first brush (241) slides in contact with the punching rod (22), and the second brush (242) is in electrical contact with the positioning push rod (451).

5. The punching mechanism for processing aerospace rivets according to claim 4, characterized in that, The top of the positioning push rod (451) is provided with a pin (453), the bottom of the positioning push rod (451) is provided with a cylinder (452), the outer wall of the pin (453) is provided with an insulating jacket (454), and the side of the pin (453) that contacts the second brush (242) is provided with a pin brush (455).

6. The punching mechanism for processing aerospace rivets according to claim 1, characterized in that, A punching support (231) is provided on the power shaft of the hydraulic rod (23). The bottom end of the punching rod (22) is a pointed end. An impact unit (21) is provided on the top of the punching rod (22). The impact unit (21) is provided on the punching support (231). The impact unit (21) is used to provide reciprocating impact force to the punching rod (22). The impact unit (21) includes an impact seat (211), an electromagnet (213) and an impact plate (214). The impact seat (211) is disposed on a punching support (231), the electromagnet (213) is slidably disposed inside the impact seat (211), and a compression spring (212) is disposed on the top of the electromagnet (213). The impact plate (214) is disposed at the bottom of the impact seat (211). The impact plate (214) is magnetic. The punching rod (22) slides through the bottom of the impact seat (211) and the top of the impact plate (214) is connected to the punching rod (22). A return spring (215) is provided at the bottom of the impact plate (214). A grounding seat (216) is provided on the side of the electromagnet (213) opposite to the impact plate (214).

7. The punching mechanism for processing aerospace rivets according to claim 1, characterized in that, The top of the forming groove (437) is provided with a flange groove (431), and a flange pressure plate (221) that is compatible with the flange groove (431) is slidably provided on the punching rod (22). Sliding seats (222) are provided on both sides of the flange pressure plate (221). The sliding seats (222) are sleeved on the hydraulic rod (23), and a sliding seat spring (223) is provided between the sliding seats (222) and the hydraulic rod (23). Positioning units (436) are provided at the bottom of the forming groove (437) and on the transmission track (41). The positioning units (436) are used to accurately position the forming groove (437) during the punching process.

8. The punching mechanism for processing aerospace rivets according to claim 1, characterized in that, The transmission track (41) is equipped with a feeding component (1) and a discharging component (3). The feeding assembly (1) includes a feeding track (11), a steering seat (12), and a push rod (14). The feeding track (11) is located at the feeding end of the steering seat (12), and the discharging end of the steering seat (12) is provided with a discharging nozzle (13). The discharging nozzle (13) corresponds to the forming groove (437). The push rod (14) is located vertically above the discharging nozzle (13), and a push block (141) is provided on the power shaft of the push rod (14). The discharge assembly (3) includes a blowing pump (31) and an ejector cylinder (34). The blowing pump (31) is located on one side of the transmission track (41), and the side of the transmission track (41) opposite to the blowing pump (31) is provided with a discharge track (32). The ejector cylinder (34) is located at the bottom of the discharge bracket (33), and the ejector cylinder (34) corresponds to the bottom of the forming groove (437).

9. The punching mechanism for processing aerospace rivets according to claim 1, characterized in that, The track support (42) is provided with a transmission drive unit (44) for driving the transmission track (41) to rotate. The transmission drive unit (44) includes a drive motor (443) and a drive gear (442). The drive motor (443) is provided on the track support (42). A drive gear (441) is provided on the power shaft of the drive motor (443). The drive gear (442) is provided on the inner side of the transmission track (41), and the drive gear (441) and the drive gear (442) mesh with each other.

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