An electromagnetic riveting device based on a rotary motor and a ball screw technology

Abstract

The application discloses an electromagnetic riveting device based on a rotating motor and a ball screw technology and belongs to the riveting technical field. The application solves the problems of difficult joint forming and low joint strength after forming when the existing electromagnetic stamping rivetless connection device is used to perform rivetless riveting on a poor plastic connecting plate material. The application comprises a coil assembly and an electromagnetic riveting gun. The coil assembly performs softening treatment on a to-be-connected position. The electromagnetic riveting gun completes stamping rivetless connection on the softening-treated to-be-connected position. The application reduces the yield strength of the joint area of the connecting plate material only under the premise of not reducing the overall strength of the plate material, facilitates the forming of the electromagnetic stamping rivetless joint, and improves the strength of the joint.

Description

TECHNICAL FIELD

[0001] The present application relates to the riveting technical field, and particularly to an electromagnetic riveting device based on rotary motor and ball screw technology. BACKGROUND

[0002] The electromagnetic stamping rivetless connection technology is a method for connecting plates together by using electromagnetic force to drive a punch to move at high speed to stamp the plates, the plates are plastically deformed, and the upper plate is embedded into the lower plate to form an interlocking structure. Figure 1 The electromagnetic stamping rivetless connection is a high-speed connection method, which can improve the energy absorption capacity of the connection joint.

[0003] The better the plasticity of the connected plates is, the easier it is to use the electromagnetic stamping rivetless connection technology to form the joint, and the higher the strength of the joint is. When the electromagnetic stamping rivetless connection technology is applied to the connected plates with poor plasticity, the poor plasticity of the connected plates leads to difficulty in joint formation and low strength of the formed joint. SUMMARY

[0004] In view of the above analysis, the present application aims to provide an electromagnetic riveting device based on rotary motor and ball screw technology to solve the problems of difficulty in joint formation and low strength of the formed joint when using the existing electromagnetic stamping rivetless connection device to perform rivetless riveting on connected plates with poor plasticity.

[0005] The main purpose of the present application is achieved by the following technical solutions:

[0006] The present application provides an electromagnetic riveting device based on rotary motor and ball screw technology in the first aspect, comprising a coil assembly and an electromagnetic riveting gun.

[0007] The coil assembly softens the to-be-connected position.

[0008] The electromagnetic riveting gun completes the stamping rivetless connection on the softened to-be-connected position.

[0009] Further, the coil assembly comprises a coil and a coil skeleton.

[0010] Further, the electromagnetic riveting gun comprises a roller screw, a nut, a mover skeleton, a permanent magnet and a stator arranged in sequence from inside to outside.

[0011] Further, the nut is fixedly connected with the mover skeleton and rotates with the mover skeleton.

[0012] Further, the electromagnetic riveting gun further comprises a punch assembly.

[0013] The punch assembly comprises a punch and a matching die.

[0014] Furthermore, the punch is connected to the ball screw.

[0015] Furthermore, it also includes a first fixing component connected to the coil assembly.

[0016] Furthermore, it also includes a second fixing component connected to the coil assembly.

[0017] Furthermore, the coil assembly is connected to the electromagnetic riveting gun via the second fixing component.

[0018] Furthermore, it also includes a third fixing component connected to the coil assembly.

[0019] Furthermore, the third fixing component includes a first fixing plate, a height adjusting member, a second fixing plate, a limiting plate, a rack, a gear, a driving member, and a driven member; the outer shell, the first fixing plate, the height adjusting member, the second fixing plate, the limiting plate, the driving member, and the driven member are connected in sequence; the rack is connected to the ball screw and the gear; the gear is sleeved on the outer wall of the driving member and the gear is threadedly connected to the driving member; the driving member is slidably connected to the limiting plate, the driving member is fixedly connected to the driven member, and the driven member is connected to the coil assembly.

[0020] A second aspect of the present invention also provides an electromagnetic riveting method, which facilitates the riveting of materials without rivets using an electromagnetic riveting device based on rotary motor and ball screw technology as described in the embodiments.

[0021] Further, it includes: A1, fixing the material to be connected;

[0022] A2, determine the riveting sequence of each connection point on the material to be connected;

[0023] A3. Move the electromagnetic riveting device so that the electromagnetic riveting gun 200 is directly above the position to be connected A, and the coil assembly 100 is directly above the position to be connected B.

[0024] In terms of the softening process, the parts to be connected, A and B, are processed sequentially from front to back; in terms of the riveting process, the parts to be connected, A and B, are processed sequentially from front to back.

[0025] A4, the coil assembly 100 is energized to perform and complete the softening treatment of the part to be connected B, and at the same time, the electromagnetic riveting gun 200 performs and completes the rivetless riveting of the part to be connected A.

[0026] A5: Determine if there are any more bits to be connected. If yes, return to A3; otherwise, proceed to A6.

[0027] A6 determines whether there is still material to be connected. If yes, it will return to A1; otherwise, the rivetless connection is completed.

[0028] Furthermore, A3' is included before A3. A3' includes: when the part to be connected A is the first riveting point in the riveting sequence, the part to be connected A is first pre-softened, and then A3 is entered after the part to be connected A has completed the softening process.

[0029] Furthermore, between A3' and A3', there is also A3'". A3' includes adjusting and fixing the first spherical adjusting screw 520 and the second spherical adjusting screw 540 according to the distance between two adjacent positions to be connected, so as to realize the movement of the second connecting plate 550 in the horizontal direction, so that the distance between the coil assembly 100 and the electromagnetic riveting gun 200 in the horizontal direction matches the distance between two adjacent positions to be connected.

[0030] Furthermore, A4' is also included between A3 and A4. A4' includes: when the part to be connected A is the last riveting point in the riveting sequence, a shield 580 is provided between the coil assembly 100 and the part to be connected B, so as to prevent the coil 110 from softening the area that does not need to be riveted.

[0031] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0032] 1. The device of the present invention reduces the yield strength of the joint area of ​​the connecting sheet material without reducing the overall strength of the sheet material. It facilitates the forming of electromagnetic stamping rivetless joints, improves the electromagnetic stamping rivetless connection effect of the joint, and increases the joint strength. It is suitable for rivetless connection of high-strength aluminum alloy, titanium alloy and high-strength steel materials, and can be applied to the manufacturing of aircraft skin and automobile body.

[0033] 2. The electromagnetic riveting gun based on the rotary motor and ball screw design of this invention makes the connection process more controllable and the overall structure of the electromagnetic riveting device more reliable.

[0034] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0035] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0036] Figure 1 This is one of the structural schematic diagrams of an electromagnetic riveting device based on rotary motor and ball screw technology in this invention;

[0037] Figure 2 This is a schematic diagram of the coil assembly.

[0038] Figure 3 This is a schematic diagram of the electromagnetic riveting gun.

[0039] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0040] Figure 5 This is a schematic diagram of the structure of the first limiting component;

[0041] Figure 6 This is a second schematic diagram of an electromagnetic riveting device based on rotary motor and ball screw technology in this invention.

[0042] Figure 7 This is a schematic diagram of the structure of the second fixing component;

[0043] Figure 8 for Figure 6 Schematic diagram of the riveting process of the electromagnetic riveting device;

[0044] Figure 9 This is the third structural schematic diagram of an electromagnetic riveting device based on rotary motor and ball screw technology in this invention;

[0045] Figure 10 This is a schematic diagram of the structure after the electromagnetic riveting gun is connected to the third fixing component;

[0046] Figure 11 This is a schematic diagram of the structure after the third fixing component is connected to the coil component;

[0047] Figure 12 This is a schematic diagram of the structure after the rack, gear, and driving component are connected.

[0048] Figure label:

[0049] 100-Coil assembly, 200-Electromagnetic riveting gun, 300-First fixing assembly, 400-Robotic arm, 500-Second fixing assembly, 600-Third fixing assembly;

[0050] 110 - Coil, 120 - Coil frame, 130 - Insulating partition;

[0051] 310 - Connecting arm, 320 - Connecting block;

[0052] 210-Roller screw, 220-Nut, 230-Motor frame, 240-Permanent magnet, 250-Stator, 260-Punch assembly, 270-Housing, 280-Screw limit assembly, 290-First bearing, 2100-Edge pressure block;

[0053] 211-Limiting stage, 212-Lead screw thread;

[0054] 261-Punch, 262-Die;

[0055] 281 - First limit component;

[0056] 2811 - Second bearing, 2812 - Connecting part, 2813 - Linear bearing;

[0057] 510-First connecting plate, 520-First spherical adjusting screw, 530-Adjusting nut, 540-Second spherical adjusting screw, 550-Second connecting plate, 560-First locking nut, 570-Second locking nut, 580-Shielding component;

[0058] 610-First fixing plate, 620-Height adjustment component, 630-Second fixing plate, 640-Limiting plate, 650-Rack, 660-Gear, 670-Driving component, 680-Driven component, 690-Current shield;

[0059] 641 - Gear limiting plate, 642 - Driving component limiting plate. Detailed Implementation

[0060] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0061] In this invention, for ease of subsequent description, the direction of the central axis of the ball screw 210 is defined as the first direction. The end of the ball screw 210 connected to the punch 261 is the first end of the ball screw 210, and the end opposite to the first end of the ball screw 210 is the second end of the ball screw 210. Simultaneously, the direction of the first end of the ball screw 210 is defined as downward, and the direction of the second end of the ball screw 210 is defined as upward.

[0062] Example 1

[0063] One specific embodiment of the present invention discloses an electromagnetic riveting device based on rotary motor and ball screw technology, such as... Figure 1 As shown, it includes a coil assembly 100, an electromagnetic riveting gun 200, and a first fixing assembly 300 for supporting the coil assembly 100; the coil assembly 100 softens the part to be connected; the electromagnetic riveting gun 200 performs a stamping rivetless connection on the softened part to be connected.

[0064] In this embodiment, the coil assembly 100 is moved to align with the part to be riveted, completing the softening process; the electromagnetic riveting gun 200 is moved to rivet the softened part. The coil assembly 100 and the electromagnetic riveting gun 200 can be moved alternately using two grippers on the same robotic arm, or two robotic arms can be used to achieve the alternating movement of the coil assembly 100 and the electromagnetic riveting gun 200.

[0065] In this embodiment, firstly, a pulse current is released by the coil assembly 100 to soften the part to be riveted, increasing its plasticity and completing the softening treatment. Then, the electromagnetic riveting gun 200 moves to the softened part, energizes it, and completes the stamping rivetless connection. The device in this embodiment reduces the yield strength of the joint area of ​​the connecting sheet metal without reducing the overall strength of the sheet metal, improves the electromagnetic stamping rivetless connection effect of the joint, and increases the joint strength. It is suitable for rivetless connections of high-strength aluminum alloys, titanium alloys, and high-strength steel materials, and can be applied to the manufacture of aircraft skins and automobile bodies.

[0066] Furthermore, the coil assembly 100 includes a coil 110 and a coil frame 120, such as Figure 2 As shown. A pulse current is released by coil 110 to soften the sheet material opposite to coil 110, thereby improving the plasticity of the sheet material. The first coil frame 120 is used to fix coil 110 and prevent short circuits between turns of coil 110.

[0067] In this embodiment, a riveting path is obtained based on the riveting position and the riveting sequence of multiple riveting positions. Based on the riveting path, coils 110 of different shapes are designed to adapt to different riveting positions, thereby accelerating the softening process of the riveting position and improving the efficiency of electromagnetic riveting.

[0068] Considering the fixation of coil 110, coil frame 120 includes a first sidewall and a second sidewall, the first sidewall and the second sidewall are arranged opposite to each other, a first groove is provided on the first sidewall, and a second groove and a third groove are provided on the second sidewall. Coil 110 includes a working wire body, a first lead end and a second lead end. The working wire body is arranged in the first groove, the first lead end passes through the coil frame 120 and is arranged in the second groove and extends out of the second groove; the second lead end passes through the coil frame 120 and is arranged in the third groove and extends out of the second groove.

[0069] To prevent the coil 110 from acting on the first fixing assembly 300 during operation, the coil assembly 100 also includes an insulating partition 130, such as... Figure 2As shown, one end of the insulating partition 130 is connected to the coil frame 120, specifically the insulating partition 130 is connected to the second side wall of the coil frame 120, and the other end is detachably connected to the first fixing component 300, which also facilitates the replacement of coil components 100 of different specifications.

[0070] Furthermore, the electromagnetic riveting device in this embodiment also includes a robotic arm connected to the coil assembly 100. The robotic arm moves the coil assembly 100 above the sheet metal to be joined, enabling both horizontal and vertical movement of the coil assembly 100 to soften different joining points. Specifically, the coil assembly 100, the first fixing component 300, and the robotic arm are connected sequentially. The robotic arm is a conventional technique and will not be described in detail here.

[0071] Furthermore, the first fixing component 300 includes a connecting arm 310 and a connecting block 320, such as Figure 1 As shown, the robotic arm 400, connecting arm 310, connecting block 320, and insulating partition 130 are connected in sequence.

[0072] In this embodiment, the insulating partition 130 prevents the coil 110 from acting on the connecting block 320 during operation.

[0073] Considering that the insulating partition 130 is detachably connected to the first fixing component 300, the first fixing component also includes a connecting component, which includes a slider and a groove that matches the slider. For example, the slider is disposed on the insulating partition 130 and the groove is disposed on the connecting block 320.

[0074] Furthermore, in this embodiment, the electromagnetic riveting gun 200 includes a riveting gun body, such as... Figure 3 and 4 As shown, the riveting gun body includes a roller screw 210, a nut 220, a mover frame 230, a permanent magnet 240, a stator 250, a punch assembly 260, and a housing 270. The punch assembly 260 includes a punch 261 and a die 262 that matches the punch 261. The punch 261 is connected to the first end of the roller screw 210. The roller screw 210 drives the punch 261 to perform linear reciprocating motion in a first direction, completing the riveting of the material to be riveted between the punch 261 and the die 262.

[0075] The roller screw 210, nut 220, mover frame 230, permanent magnet 240, stator 250, punch assembly 260, and housing 270 are arranged sequentially from the inside out. The roller screw 210 and nut 220 form a helical pair. The nut 220, mover frame 230, and permanent magnet 240 are sequentially fixed together. A gap is provided between the permanent magnet 240 and the stator 250. When the stator 250 is energized, it generates an electromagnetic force with the permanent magnet 240, forming a rotating magnetic field. The mover frame 230 rotates under the influence of this rotating magnetic field. Simultaneously, because the mover frame 230 is fixed to the nut 220, the nut 220 is driven to rotate by the mover frame 230. The rotation of the nut 220 drives the roller screw 210 to reciprocate linearly in the first direction, thereby achieving the purpose of the roller screw 210 driving the punch 261 to reciprocate linearly along the line connecting the punch 261 and the die 262.

[0076] In this embodiment, the outer shell 270 includes a first opening, a first cavity, a second cavity, and a second opening arranged sequentially from top to bottom. The roller screw 210 passes through the first opening, the first cavity, the second cavity, and the second opening in sequence. The nut 220, the mover frame 230, the permanent magnet 240, and the stator 250 are all arranged in the first cavity.

[0077] In this embodiment, the roller screw 210 includes a screw body, a limiting platform 211, a screw thread 212, and a mounting position. The limiting platform 211, the screw thread 212, and the mounting position are arranged sequentially from the second end to the first end of the screw body. The limiting platform 211 is arranged in the first cavity. The screw thread 212 is connected to the nut 220. The mounting position is used to install the punch 261.

[0078] Considering the stability of the linear reciprocating motion of the ball screw 210, the electromagnetic riveting gun 200 also includes a ball screw limiting assembly 280, which includes a first limiting assembly 281. The first limiting assembly 281 includes an upper limiting assembly located in a first cavity and a lower limiting assembly located in a second cavity. Through the upper limiting assembly, the ball screw 210 is connected to the inner wall of the mover frame 230. Specifically, the mover frame 230, the upper limiting assembly, and the ball screw 210 are arranged sequentially from the outside to the inside. Through the lower limiting assembly, the ball screw 210 is connected to the inner wall of the outer shell 270. Specifically, the outer shell 270, the lower limiting assembly, and the ball screw 210 are arranged sequentially from the outside to the inside.

[0079] In this embodiment, both the upper limit assembly and the lower limit assembly include a base assembly. The base assembly includes a second bearing 2811, a connecting member 2812, and a linear bearing 2813 connected sequentially from the outside to the inside. Figure 5 As shown.

[0080] Considering the limiting function during the linear reciprocating motion of the ball screw 210, the limiting assembly 280 further includes a second limiting assembly. The second limiting assembly includes a sliding key and a sliding keyway. The sliding key is disposed on the ball screw 210, specifically on the side wall of the screw body, and located between the limiting platform 211 and the second end of the ball screw 210. The sliding keyway is disposed on the inner wall of the linear bearing of the upper limiting assembly.

[0081] In this embodiment, the outer wall of the mover frame 230 includes an upper step portion, a connecting side wall, and a lower step portion arranged sequentially from top to bottom. The upper step portion and the lower step portion enable the mover frame 230 to be rotatably connected to the inner wall of the outer shell 270. The cavity formed between the connecting side wall and the inner wall of the outer shell 270 provides installation space for the permanent magnet 240 and the stator 250. The permanent magnet 240 is connected to the connecting side wall, and the stator 250 is connected to the inner wall of the outer shell 270 opposite to the connecting side wall.

[0082] Considering the smooth rotation and high rotational accuracy of the moving frame 230, the electromagnetic riveting gun 200 also includes a first bearing 290. The moving frame 230 is rotatably connected to the inner wall of the housing 270 through the first bearing 290. Specifically, the first bearing 290 includes an upper bearing and a lower bearing with the same structure. The upper step is rotatably connected to the inner wall of the housing 270 through the upper bearing, and the lower step is rotatably connected to the inner wall of the housing 270 through the lower bearing.

[0083] In this embodiment, the riveting gun body also includes a pressing rubber block 2100 connected to the punch 261, and the pressing rubber block 2100 is sleeved on the outside of the punch 261.

[0084] Furthermore, the electromagnetic riveting gun also includes a support frame for supporting the main body of the riveting gun. The support frame includes a fixed frame and a C-shaped frame. The fixed frame is connected to the main body of the riveting gun to provide fixed support for the main body of the riveting gun. The first end of the C-shaped frame is connected to the fixed frame, and the second end is set towards the punch 261. The second end of the C-shaped frame is provided with a die mounting groove for mounting the die 262.

[0085] Furthermore, the electromagnetic riveting device in this embodiment includes a power supply mechanism, which includes a first power supply unit and a second power supply unit. The first power supply unit is connected to the coil assembly 100 to soften the position to be joined by the coil assembly 100. The second power supply unit is connected to the electromagnetic riveting gun 200 to perform rivetless riveting of the softened position to be joined by the electromagnetic riveting gun 200.

[0086] Example 2

[0087] This embodiment provides an electromagnetic riveting method, which utilizes an electromagnetic riveting device based on rotary motor and ball screw technology as described in Embodiment 1 to complete the rivetless connection of the materials to be joined, including:

[0088] S1, Fix the material to be connected;

[0089] S2, Determine the location to be connected;

[0090] S3, move the coil assembly 100 directly above the position to be connected;

[0091] S4, the first power supply unit is started, the coil assembly 100 works, and the softening process of the position to be connected is performed and completed;

[0092] S5, remove the coil assembly 100 and move the electromagnetic riveting gun 200 to the softened position to be connected;

[0093] S6, start the second power supply unit, the electromagnetic riveting gun 200 works, the roller screw 210 moves in the direction of the position to be connected, until the punch 261 presses the position to be connected into the die 262, and the rivetless riveting is completed.

[0094] S7, determine if there are still positions to be connected. If yes, return to S2; otherwise, proceed to S8.

[0095] S8 determines whether there is still material to be connected. If yes, return to S1; otherwise, the rivetless connection is completed.

[0096] In this embodiment, a pulse current is used to soften the sheet material at the connection position below the coil 110, thereby completing the softening treatment, improving plasticity, and facilitating rivetless riveting.

[0097] In this embodiment, before S3, the process further includes determining the specifications of the coil 110 to be used, replacing the coil assembly 100 based on the specifications of the coil 110, and connecting the replaced coil assembly 100 to the first fixing assembly 300.

[0098] In this embodiment, in S3 and S5, the operation of the movable coil assembly 100 and the movable electromagnetic riveting gun 200 is achieved by the two tentacles of the same robotic arm, or by the two robotic arms respectively.

[0099] Example 3

[0100] This embodiment discloses an electromagnetic riveting device based on rotary motor and ball screw technology. The difference from Embodiment 1 is that the coil assembly 100 is connected to the housing of the electromagnetic riveting gun via a second fixing assembly 400. Figure 6 As shown, the electromagnetic riveting gun 200 is connected to the moving mechanism. In one movement of the moving mechanism, the coil assembly 100 and the electromagnetic riveting gun move synchronously, moving not only the coil assembly 100 to the next riveting section, but also the electromagnetic riveting gun to the softened riveting section for riveting.

[0101] The electromagnetic riveting gun in this embodiment has the same structure as the electromagnetic riveting guns in embodiments 1 and 2, and will not be described again. The coil assembly in this embodiment has the same structure as the coil assembly in embodiments 1 and 2, and will not be described again.

[0102] Compared with Embodiment 1, the electromagnetic riveting device in this embodiment achieves simultaneous movement of the coil assembly 100 and the electromagnetic riveting gun 200 through a moving mechanism. The coil assembly 100 and the electromagnetic riveting gun 200 do not alternate in position, simplifying the operation process and reducing costs.

[0103] Compared to Embodiment 1, the softening treatment of the coil assembly 100 and the rivetless connection of the electromagnetic riveting gun 200 are completed simultaneously, such as... Figure 8 As shown, when the coil assembly 100 softens the next position to be connected, the electromagnetic riveting gun 200 completes the rivetless connection of the currently softened position, thereby improving riveting efficiency.

[0104] In this embodiment, as Figure 7 As shown, the second fixing component 500 includes a first connecting plate 510, a first spherical adjusting screw 520, an adjusting nut 530, a second spherical adjusting screw 540, and a second connecting plate 550 connected in sequence. The first connecting plate 510 is fixedly connected to the outer shell 270, and the second connecting plate 550 is fixedly connected to the coil assembly 100 in sequence.

[0105] In more detail, the ball end of the first spherical adjusting screw 520 is ball-jointed and locked to the first connecting plate 510. The ball end of the second spherical adjusting screw 540 is ball-jointed and locked to the second connecting plate 550. The arrangement of the first and second spherical adjusting screws 520 and 540 allows the second connecting plate 550 to move horizontally, thereby adjusting the horizontal distance between the coil assembly 100 and the electromagnetic riveting gun 200, facilitating riveting of various spacing joints. The second fixing assembly 500 also includes a first locking nut 560 and a second locking nut 570. The ball end of the first spherical adjusting screw 520 is locked to the first connecting plate 510 via the first locking nut 560, and the ball end of the second spherical adjusting screw 540 is locked to the second connecting plate 550 via the second locking nut 570.

[0106] In more detail, by screwing the rod ends of the first spherical adjusting screw 520 and the second spherical adjusting screw 540 to the adjusting nut 530 respectively, the height of the second connecting plate 550 is adjusted, thereby setting the height of the coil assembly 110, and thus adjusting the distance between the coil assembly 100 and the plate to be connected.

[0107] Furthermore, the second fixing assembly 500 also includes a shield 580 disposed below and rotatably connected to the second connecting plate 550, with a gap between the shield 580 and the second connecting plate 550 for mounting the coil assembly 110. By providing the shield 580, the problem of the coil assembly 110 being energized and acting on the sheet material that does not require softening treatment during the riveting of the last joint is avoided, thus preventing any impact on the sheet material's performance.

[0108] Furthermore, the electromagnetic riveting device in this embodiment includes only one power supply unit, namely the third power supply unit. The third power supply unit can both soften the position to be connected by the coil assembly 100 and enable the electromagnetic riveting gun 200 to rivet the softened position to be connected without rivets.

[0109] Example 4

[0110] This embodiment provides an electromagnetic riveting method, which utilizes an electromagnetic riveting device based on rotary motor and ball screw technology as described in Embodiment 3 to achieve rivetless connection of the materials to be joined. Figure 8 As shown, it includes:

[0111] A1, Fix the material to be connected;

[0112] A2, determine the riveting sequence of each connection point on the material to be connected;

[0113] A3. Move the electromagnetic riveting device so that the electromagnetic riveting gun 200 is directly above the position to be connected A, and the coil assembly 100 is directly above the position to be connected B.

[0114] In terms of the softening process, the parts to be connected, A and B, are processed sequentially from front to back; in terms of the riveting process, the parts to be connected, A and B, are processed sequentially from front to back.

[0115] A4, the coil assembly 100 is energized to perform and complete the softening treatment of the part to be connected B, and at the same time, the electromagnetic riveting gun 200 performs and completes the rivetless riveting of the part to be connected A.

[0116] A5: Determine if there are any more bits to be connected. If yes, return to A3; otherwise, proceed to A6.

[0117] A6 determines whether there is still material to be connected. If yes, it will return to A1; otherwise, the rivetless connection is completed.

[0118] In this embodiment, since the coil assembly 100 is connected to the housing 270 of the electromagnetic riveting gun 200, the synchronous movement of the coil assembly 100 and the electromagnetic riveting gun 200 is achieved through a moving mechanism connected to the electromagnetic riveting gun 200.

[0119] Furthermore, A3' is included before A3. A3' includes: when the part to be connected A is the first riveting point in the riveting sequence, the part to be connected A is first pre-softened, and then A3 is entered after the part to be connected A has completed the softening process.

[0120] Furthermore, between A3' and A3', there is also A3'". A3' includes adjusting and fixing the first spherical adjusting screw 520 and the second spherical adjusting screw 540 according to the distance between two adjacent positions to be connected, so as to realize the movement of the second connecting plate 550 in the horizontal direction, so that the distance between the coil assembly 100 and the electromagnetic riveting gun 200 in the horizontal direction matches the distance between two adjacent positions to be connected.

[0121] Furthermore, A4' is also included between A3 and A4. A4' includes: when the part to be connected A is the last riveting point in the riveting sequence, a shield 580 is provided between the coil assembly 100 and the part to be connected B, so as to prevent the coil 110 from softening the area that does not need to be riveted.

[0122] Furthermore, in A4, the coil assembly 100 is simultaneously energized and the electromagnetic riveting gun 200 is driven to rivet through the third power supply unit.

[0123] Example 5

[0124] This embodiment discloses an electromagnetic riveting device based on rotary motor and ball screw technology. The difference from Embodiment 3 is that it includes a third fixing component 600, through which the coil assembly is connected to the housing of the electromagnetic riveting gun. Figure 9 and Figure 10 As shown, and through the transmission connection between the third fixed component 500 and the roller screw, during the linear reciprocating motion of the roller screw, the coil assembly is driven to perform linear reciprocating motion between the starting position and the ending position of the coil assembly, wherein the starting position of the coil assembly is directly below the first end of the roller screw 210.

[0125] The electromagnetic riveting gun in this embodiment has the same structure as the electromagnetic riveting guns in embodiments 1 and 2, and will not be described again. The coil assembly in this embodiment has the same structure as the coil assembly in embodiments 1 and 2, and will not be described again.

[0126] In this embodiment, the coil assembly 100 softens the connection point and the punch 261 rivets the connection point in one linear reciprocating motion of the ball screw 210, which not only improves the riveting efficiency, but also simplifies the structure of the riveting equipment.

[0127] Compared with Example 3, this example only requires determining the position to be connected, without considering the gap between each position and the riveting sequence. This example can complete the rivetless connection without moving the electromagnetic riveting gun after softening treatment at any position to be connected. It is simple, convenient, and fast, significantly improving work efficiency and realizing rivetless connection of any position to be connected.

[0128] Furthermore, such as Figure 10 , Figure 11 and Figure 12 As shown, the third fixing component 600 includes a first fixing plate 610, a height adjusting member 620, a second fixing plate 630, a limiting plate 640, a rack 650, a gear 660, a driving member 670, and a driven member 680. The housing 270, the first fixing plate 610, the height adjusting member 620, the second fixing plate 630, the limiting plate 640, the driving member 670, and the driven member 680 are connected sequentially. The rack 650 is fixedly connected to the roller screw 210 and is also connected to the gear 660. The gear 660 is sleeved on the outer wall of the driving member 670 and is threadedly connected to the driving member 670, forming a helical pair. The driving member 670 is slidably connected to the limiting plate 640, and is fixedly connected to the driven member 680. The driven member 680 is connected to the coil assembly 100.

[0129] Furthermore, the limiting plate 640 includes a gear limiting plate 641 and a driving element limiting plate 642, such as... Figure 11 As shown, one end of the gear limiting plate 641 is fixedly connected to the second fixed plate 630, and the other end is rotatably connected to the gear 660. Two gear limiting plates 641 are provided, and the gear 660 is positioned between the two gear limiting plates 641, supporting the gear 660 on one hand and restricting its movement on the other. One end of the driving member limiting plate 642 is fixedly connected to the second fixed plate 630, and the other end is provided with a through hole matching the driving member 670. Two driving member limiting plates 642 are provided and positioned on both sides of the driving member 670, supporting the driving member 670.

[0130] In this embodiment, the ball screw 210 drives the rack 650 to perform linear motion. The rack 650 is connected to the gear 660, which in turn drives the gear 660 to perform rotational motion. Under the condition that the gear 660 rotates in its original position, the gear 660 drives the driving member 670 to perform linear motion. The driving member 670 drives the driven member 680 to perform linear motion. In turn, the driven member 680 drives the coil assembly 100 to perform linear reciprocating motion in the direction of the long axis of the driven member 680, thereby moving the coil assembly 100 from its starting position to its ending position.

[0131] To prevent the coil assembly 100 from softening its lower connecting plate when it is at its end position, which could alter the properties of the non-connecting area plate and affect the performance of the non-riveting area plate, the third fixing assembly 600 also includes a current shield 690, such as... Figure 11 As shown, one end of the current shield 690 is connected to the second fixing plate 630, and the other end is located between the coil assembly 100 and the plate to be connected.

[0132] In this embodiment, the distance between the first fixing plate 610 and the second fixing plate 630 is adjusted by the height adjustment component 620, thereby adjusting the distance between the coil assembly 100 and the first end of the roller screw 210, and thus realizing the adjustment of the distance between the coil assembly 100 and the plate to be connected.

[0133] The electromagnetic riveting device in this embodiment includes a fourth power supply unit. This fourth power supply unit enables both the softening treatment of the coil assembly 100 at the connection point and the riveting without rivets by the electromagnetic riveting gun 200 at the softened connection point. The fourth power supply unit includes a charging switch, a supercapacitor, a discharging switch, and an inverter. The charging switch and the supercapacitor are connected in parallel, while the supercapacitor, discharging switch, electromagnetic riveting gun 200, coil assembly 100, and inverter form a series power supply connection. When the charging switch is closed, the supercapacitor is charged. Once fully charged, the charging switch automatically opens, the discharging switch opens, and the coil assembly 100 is energized to soften the connection point. The electromagnetic riveting gun 200 then begins operation. Driven by the ball screw 210, the third fixing component moves the coil assembly 100 until it moves outside the trajectory of the ball screw 210. At this point, the punch 261 presses into the die 262 to complete the riveting.

[0134] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An electromagnetic riveting device based on rotary motor and ball screw technology, characterized in that, Includes a coil assembly (100) and an electromagnetic riveting gun (200). The coil assembly (100) softens the connection point; The electromagnetic riveting gun (200) completes the stamping rivetless connection on the part to be connected after softening treatment; The coil assembly (100) includes a coil (110) and a coil frame (120). The electromagnetic riveting gun (200) includes, from the inside out, a roller screw (210), a nut (220), a mover frame (230), a permanent magnet (240), and a stator (250). The nut (220) is fixedly connected to the moving part frame (230) and rotates with the moving part frame (230); The electromagnetic riveting gun (200) also includes a punch assembly (260). The punch assembly (260) includes a punch (261) and a die (262) that matches the punch (261). The punch (261) is connected to the ball screw (210); It also includes a third fixing component (600), through which the coil assembly (100) is connected to the housing of the electromagnetic riveting gun (200); The third fixing component (600) includes a first fixing plate (610), a height adjusting member (620), a second fixing plate (630), a limiting plate (640), a rack (650), a gear (660), a driving member (670), and a driven member (680), which are sequentially arranged as follows: housing (270), first fixing plate (610), height adjusting member (620), second fixing plate (630), limiting plate (640), driving member (670), and driven member (680). The rack (650) is fixedly connected to the roller screw (210), and the rack (650) is connected to the gear (660). The gear (660) is sleeved on the outer wall of the driving member (670), and the gear (660) is threadedly connected to the driving member (670) to form a helical pair. The driving member (670) is slidably connected to the limiting plate (640). The driving member (670) is fixedly connected to the driven member (680), and the driven member (680) is connected to the coil assembly (100). The limiting plate (640) includes a gear limiting plate (641) and a driving component limiting plate (642). One end of the gear limiting plate (641) is fixedly connected to the second fixed plate (630), and the other end is rotatably connected to the gear (660). Two gear limiting plates (641) are provided, and the gear (660) is provided between the two gear limiting plates (641). On the one hand, the gear (660) is supported, and on the other hand, the movement of the gear (660) is restricted. One end of the driving component limiting plate (642) is fixedly connected to the second fixed plate (630), and the other end is provided with a through hole that matches the driving component (670). Two driving component limiting plates (642) are provided and are provided on both sides of the driving component (670). The driving component limiting plate (642) supports the driving component (670).

2. An electromagnetic riveting method, characterized in that, The electromagnetic riveting device based on rotary motor and ball screw technology as described in claim 1 is used to perform rivetless connection of the materials to be connected.

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