Riveting equipment for automobile sheet metal

Abstract

The invention relates to the technical field of sheet metal part riveting, in particular to automobile sheet metal riveting equipment which comprises a main body assembly, a cabinet body, a workbench arranged at the end of the cabinet body and a gluing machine. The riveting assembly comprises a mechanical arm and a riveting gun arranged at the end of the mechanical arm. A worktable in the main body assembly is matched with a gluing machine, so that the sheet metal parts can be accurately positioned, the connecting parts can be glued, a stable foundation is provided for riveting, and the connecting quality is guaranteed; a mechanical arm of the riveting assembly drives a riveting gun to flexibly move, a guide part at the end of the riveting gun dynamically corrects the posture of a rivet, it is ensured that the rivet enters a sheet metal part in a vertical state, the problems that the rivet is inclined, and riveting force is not distributed evenly are effectively solved, and therefore the riveting precision and the connecting quality are improved. And through the design of the pressing part, self-adaptive pressing of the sheet metal part is achieved. The floating presser foot can independently adjust pressure according to the surface unevenness of the sheet metal part through cooperation of the disc spring set and the second ball, pressing force is evenly distributed, and local deformation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal riveting, in particular to riveting equipment for automobile sheet metal. Background Art

[0002] In the field of automotive sheet metal manufacturing, the widespread use of lightweight materials such as aluminum alloys and magnesium alloys has posed severe challenges to the riveting process. When traditional riveting equipment processes complex curved structures such as car doors and hoods, the slight deflection caused by mechanical vibration or guide gap during rivet transportation can cause the aluminum alloy sheets to be skewed and the stress distribution to be uneven during riveting, especially at the overlapping parts of multiple layers of sheet metal. It is easy to cause local deformation; the rigid presser foot structure cannot adapt to the curved or uneven areas of the sheet metal (such as the corners of the car body and the step transition surface). When the presser foot contacts the sheet metal surface with a height difference of 0.5-2mm, the local uneven pressure will cause the edge of the upper sheet metal to warp or the lower sheet metal to dent, which directly affects the appearance accuracy and structural sealing of the car body. This type of problem is particularly prominent in the riveting of key components such as the battery pack shell of new energy vehicles. If the pressure distribution in the riveted area is uneven, the seal may fail due to shell deformation, and even affect the safety of the battery.

[0003] At the same time, the aerospace and high-speed rail manufacturing sectors face similar technical bottlenecks. The riveting of aluminum forging skins and titanium alloy frames for aerospace applications requires a balance between lightweighting and fatigue resistance. When handling titanium alloy rivets, microcracks can easily form due to posture deviations of 0.1mm, impacting the life of the aircraft structure. The riveting of copper alloy forgings in high-speed rail braking systems must withstand high-frequency vibrations. The insufficient reset accuracy of traditional equipment can cause riveted joints to loosen, threatening high-speed driving safety. The problems exposed in automotive sheet metal manufacturing, the risk of surface scratches when riveting curved surfaces of aerospace magnesium alloy forgings, and the connection reliability requirements of high-speed rail brake parts all stem essentially from deficiencies in riveting equipment during riveting. Summary of the Invention

[0004] In view of the above problems in the prior art, the present invention is proposed.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a riveting device for automobile sheet metal, comprising a main assembly including a cabinet, a workbench provided at an end of the cabinet, and a glue machine;

[0006] The riveting assembly provided at the end of the cabinet includes a mechanical arm and a riveting gun provided at the end of the mechanical arm, the end of the riveting gun is provided with a gun head, the inner wall of the gun head is provided with a conveying cavity, and the inner wall of the conveying cavity is provided with a guide component for correcting the posture of the rivet;

[0007] The end of the gun head is also provided with a pressing component, which includes a presser foot block and a floating presser foot. The floating presser foot array is arranged on the outer wall of the presser foot block to be close to the sheet metal and adapt to the plane of the sheet metal.

[0008] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, wherein: a fixed sleeve is installed on the inner wall of the pressure foot block and a limiting sleeve is also fixed on the inner wall of the fixed sleeve; a ball joint block is also movably provided on the inner wall of the limiting sleeve and the ball joint block is fixedly installed on the outer wall of the gun head; the gun head moves inside the limiting sleeve through the ball joint block to change the angle between the gun head and the fixed sleeve.

[0009] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, wherein: the outer wall of the fixed sleeve is provided with a fixing ring and the end of the fixing ring extends to the end of the mounting plate fixed to the inner wall of the presser foot block, the inner wall of the mounting plate is provided with a first ball and the first ball is attached to the outer wall of the fixing ring, and the fixed sleeve moves on the inner wall of the presser foot block through the cooperation between the fixing ring and the first ball.

[0010] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, the inner wall of the presser foot block is also provided with a moving ring and the outer wall of the moving ring is in contact with the inner wall of the presser foot block, the inner wall of the presser foot block is provided with a second elastic member for pushing the moving ring, the end face of the moving ring is provided with a reset pressure groove and the reset pressure groove is opposite to the reset straight plate provided at the end of the fixed sleeve.

[0011] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, wherein: an airbag is provided at the end of the moving ring and the end of the airbag is connected to a connecting tube, the connecting tube is connected to an external air source and supplies air to the airbag to expand it, and when the airbag expands, it pushes the moving ring to move on the inner wall of the presser foot block, and when the moving ring moves, the presser foot block is reset by cooperating with the reset pressure groove and the reset straight plate.

[0012] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, the outer wall of the presser foot block is provided with a mounting sleeve, the outer wall array of the mounting sleeve is provided with a mounting cavity, the floating presser foot is arranged on the inner wall of the mounting cavity and the end of the floating presser foot is provided with a disc spring group.

[0013] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, the inner wall of the floating presser foot is also provided with a second ball and the end of the second ball is provided with a third elastic member to push the second ball, and the end surface of the floating presser foot is also provided with a flexible pad.

[0014] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, the guiding component includes a guiding tile, which is arranged in an accommodating cavity opened on the inner wall of the conveying cavity, and a second sliding column is provided at the end of the guiding tile, and the end of the second sliding column extends to the inner wall of the limiting groove opened on the inner wall of the accommodating cavity and slides with it.

[0015] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, a rotating ring is provided at the end of the accommodating cavity and an arc groove is provided on the end face of the rotating ring; a first sliding column is also provided at the end of the guide pad and the end of the first sliding column extends to the inner wall of the arc groove and slides with it.

[0016] As a preferred solution of the riveting equipment for automobile sheet metal described in the present invention, the outer wall of the guide pad is also provided with a first elastic member and the other end of the first elastic member is provided on the inner wall of the accommodating cavity, and the first elastic member is used to push the guide pad to move toward the inside of the conveying cavity.

[0017] The beneficial effects of the present invention are as follows: the cooperation between the workbench and the glue machine in the main assembly can accurately position the sheet metal parts and apply glue to the connection parts, providing a stable foundation for riveting and ensuring the quality of the connection; the mechanical arm of the riveting assembly drives the riveting gun to move flexibly, and the guide component at the end of the riveting gun dynamically corrects the rivet posture to ensure that the rivet enters the sheet metal part in a vertical state, effectively avoiding problems such as rivet skew and uneven distribution of riveting force, thereby improving the riveting accuracy and connection quality; the design of the clamping component realizes adaptive clamping of the sheet metal parts. The floating pressure foot can independently adjust the pressure according to the surface unevenness of the sheet metal part through the cooperation of the disc spring group and the second ball, evenly distribute the pressing force and reduce local deformation; the gun head can adjust the angle through the cooperation of the ball joint block and the fixed sleeve, and the combination of the fixed ring and the first ball realizes the lateral movement of the pressure foot block to ensure that the rivet is pressed vertically, further ensuring the vertical docking of the rivet and the sheet metal part. These designs significantly improve the stability and adaptability of riveting, and are particularly suitable for sheet metal parts with complex curved surfaces or step transitions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a riveting device for automobile sheet metal according to the present invention;

[0020] Figure 2 It is a structural schematic diagram of the riveting assembly in the present invention;

[0021] Figure 3 It is a side sectional view of the gun head of the present invention;

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at center A;

[0023] Figure 5 Schematic diagram of the internal structure of the presser foot block in the present invention;

[0024] Figure 6 Schematic diagram of the internal structure of the floating presser foot in the present invention.

[0025] Reference numerals: 100, main assembly; 101, cabinet; 102, workbench; 103, glue machine;

[0026] 200, riveting assembly; 201, robotic arm; 202, riveting gun; 2021, gun head; 203, conveying channel; 2031, accommodating chamber; 2032, limiting groove; 204, rotating ring; 2041, arc groove; 205, guide shoe; 2051, first slide post; 2052, second slide post; 206, first elastic member;

[0027] 301. Ball joint block; 302. Limiting sleeve block; 303. Fixed sleeve; 3031. Fixed ring; 3032. Reset straight plate; 304. Presser foot block; 3041. Mounting plate; 3042. First ball; 3043. Second elastic member; 305. Moving ring; 3051. Reset pressure groove; 3052. Mounting groove; 306. Airbag; 3061. Connecting pipe; 307. Mounting sleeve; 3071. Mounting cavity; 308. Floating presser foot; 3081. Disc spring assembly; 3082. Second ball; 3083. Third elastic member; 309. Flexible pad. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0031] Example 1

[0032] Reference Figures 1 to 4 , which is the first embodiment of the present invention, provides a riveting device for automobile sheet metal.

[0033] Specifically, the main assembly 100 includes a cabinet 101, a workbench 102 and a glue machine 103 provided at the end of the cabinet 101;

[0034] The riveting assembly 200 provided at the end of the cabinet 101 includes a robotic arm 201 and a riveting gun 202 provided at the end of the robotic arm 201. The riveting gun 202 is provided with a gun head 2021 at the end thereof, and a delivery cavity 203 is provided on the inner wall of the gun head 2021. The inner wall of the delivery cavity 203 is provided with a guide component for correcting the posture of the rivet.

[0035] A clamping component is also provided at the end of the gun head 2021, which includes a presser foot block 304 and a floating presser foot 308. The floating presser foot 308 array is arranged on the outer wall of the presser foot block 304 to be close to the sheet metal and adapt to the plane of the sheet metal.

[0036] Among them, the workbench 102 is fixed above the cabinet 101, and the automobile sheet metal parts are placed and positioned through the workbench 102 to ensure that the position of the sheet metal parts is accurate and stable during riveting, which is convenient for subsequent riveting work. The gluing machine will apply a layer of adhesive to the automobile sheet metal parts at the connection point, cooperate with the subsequent riveting work to complete the connection of the sheet metal parts and ensure the quality after connection.

[0037] The rivet gun 202 is installed at the end of the robot arm 201. The robot arm 201 drives the rivet gun 202 to move outside the automobile sheet metal. When riveting work is required, the robot arm moves the rivet gun 202 close to the outside of the sheet metal and completes the riveting work.

[0038] After the rivet enters the top clamp in the conveying cavity 203 on the inner wall of the gun head 2021, it is pressed into the sheet metal. The posture of the rivet is corrected by the guiding component on the inner wall of the conveying cavity 203 to prevent the rivet from being slightly deflected, tilted or rotated due to slight vibration, airflow or guide gap, so that the rivet is in an irrational vertical state when being pressed into the sheet metal. When the rivet enters the clamp in a non-ideal posture and is pressed into the sheet metal, it may cause the rivet to be skewed, the riveting point to be asymmetric, and the riveting force to be unevenly distributed.

[0039] At the same time, a clamping component is installed at the end of the gun head 2021. When riveting, as the rivet gun 202 approaches the surface of the sheet metal, the floating presser foot 308 first approaches the surface of the sheet metal, and as the equipment moves downward to press the stack of sheet metal, the pressure foot block 304 provides an overall clamping force. The external floating presser foot 308 is independently compressed or extended according to the local height and rigidity of the sheet metal stack below it, and the elastic body inside the floating presser foot 308 provides adaptive pressure to ensure that even in uneven areas such as edges, corners, and step transitions, sufficient and more evenly distributed local clamping force can be obtained, significantly reducing the micro-deformation of the sheet metal around the riveting point caused by insufficient local support or uneven pressure.

[0040] Example 2

[0041] Reference Figure 2 、 Figure 3 、 Figure 5 and Figure 6 , which is the second embodiment of the present invention, and is implemented based on the previous embodiment.

[0042] Specifically, a fixed sleeve 303 is installed on the inner wall of the pressure foot block 304, and a limiting sleeve 302 is also fixed on the inner wall of the fixed sleeve 303. A ball joint block 301 is also movably provided on the inner wall of the limiting sleeve 302, and the ball joint block 301 is fixedly installed on the outer wall of the gun head 2021. The gun head 2021 is movable inside the limiting sleeve 302 through the ball joint block 301 to change the angle between it and the fixed sleeve 303.

[0043] Among them, the ball joint block 301 is fixed to the outside of the bottom end of the gun head 2021, and the ball joint block 301 can move inside the limiting sleeve 302. Since the limiting sleeve 302 is fixed inside the fixed sleeve 303, the gun head 2021 can change its angle inside the fixed sleeve 303 through the ball joint block 301.

[0044] Preferably, a fixing ring 3031 is provided on the outer wall of the fixing sleeve 303 and the end of the fixing ring 3031 extends to the end of the mounting plate 3041 fixed to the inner wall of the presser foot block 304, a first ball 3042 is provided on the inner wall of the mounting plate 3041 and the first ball 3042 is attached to the outer wall of the fixing ring 3031, and the fixing sleeve 303 moves on the inner wall of the presser foot block 304 through the cooperation between the fixing ring 3031 and the first ball 3042.

[0045] Among them, two layers of mounting plates 3041 are set inside the pressure foot block 304, and multiple first balls 3042 are set inside the mounting plates 3041. The fixing ring 3031 on the outer wall of the fixed sleeve 303 is located in the middle of the two layers of mounting plates 3041, and the fixing ring 3031 is sandwiched between the upper and lower layers of first balls 3042.

[0046] The fixed sleeve 303 is fixed to the outside of the limiting sleeve 302 and installed on the outside of the gun head 2021 , so the pressure foot block 304 can move laterally outside the fixed sleeve 303 through the first ball 3042 inside.

[0047] A moving ring 305 is also provided on the inner wall of the presser foot block 304, and the outer wall of the moving ring 305 is in contact with the inner wall of the presser foot block 304. A second elastic member 3043 is provided on the inner wall of the presser foot block 304 for pushing the moving ring 305. A reset pressure groove 3051 is provided on the end face of the moving ring 305, and the reset pressure groove 3051 is opposite to the reset straight plate 3032 provided at the end of the fixed sleeve 303.

[0048] Among them, the outer wall of the moving ring 305 is close to the inner wall of the presser foot block 304, and the moving ring 305 moves laterally with the fixed sleeve 303 along with the presser foot block 304. The difference is that the moving ring 305 is above the fixed sleeve 303 and is pushed by the second elastic member 3043 to the upper position inside the presser foot block 304. Under normal circumstances, it does not contact the fixed sleeve 303.

[0049] An airbag 306 is provided at the end of the moving ring 305 and the end of the airbag 306 is connected to a connecting tube 3061. The connecting tube 3061 is connected to an external air source and supplies air to the airbag 306 to make it expand. When the airbag 306 expands, it pushes the moving ring 305 to move on the inner wall of the presser foot block 304. When the moving ring 305 moves, the presser foot block 304 is reset by cooperating with the reset pressure groove 3051 and the reset straight plate 3032.

[0050] Among them, such as Figure 5 As shown, the reset groove 3051 is an inverted triangle and is opened on the lower surface of the moving ring 305 and is opposite to the reset straight plate 3032 on the upper surface of the fixed sleeve 303. When the presser foot block 304 is laterally displaced relative to the fixed sleeve 303, a deviation also occurs between the reset straight plate 3032 and the reset groove 3051, but the top of the reset straight plate 3032 is still within the notch range of the reset groove 3051. When the airbag 306 expands, it pushes the moving ring 305 to overcome the elastic force of the second elastic member 3043 and move downward. Through the contact between the groove edge of the reset groove 3051 and the reset straight plate 3032, the reset straight plate 3032 slides toward the center of the reset groove 3051, so that the presser foot block 304 is reset relative to the fixed sleeve 303.

[0051] The outer wall of the presser foot block 304 is provided with a mounting sleeve 307 , and the outer wall of the mounting sleeve 307 is provided with a mounting cavity 3071 . The floating presser foot 308 is provided on the inner wall of the mounting cavity 3071 and a disc spring assembly 3081 is provided at the end of the floating presser foot 308 .

[0052] Among them, the disc spring group 3081 is installed above the floating presser foot 308. The disc spring group 3081 makes the floating presser foot 308 move closer to the sheet metal than the presser foot block 304. When the floating presser foot 308 contacts the surface of the sheet metal, as the presser foot block 304 continues to move downward, the floating presser foot 308 shrinks different distances in its respective mounting cavity 3071 according to the different heights of the sheet metal below. The disc spring group 3081 provides adaptive pressure to ensure that the floating presser foot 308 can obtain sufficient and more evenly distributed local clamping force in uneven areas, thereby avoiding slight dents, bulges or warping at the edge of the top sheet metal or the contact between the bottom sheet metal and the mold due to uneven pressure or insufficient support at the moment of rivet penetration or forming.

[0053] Preferably, the inner wall of the floating presser foot 308 is further provided with a second ball 3082 and the end of the second ball 3082 is provided with a third elastic member 3083 to push the second ball 3082 , and the end surface of the floating presser foot 308 is further provided with a flexible pad 309 .

[0054] Among them, the second ball 3082 is pushed downward inside the floating presser foot 308 by the third elastic member 3083. The initial posture is that the second ball 3082 is exposed from the lower surface of the floating presser foot 308. When it just contacts the surface of the sheet metal, the second ball 3082 can roll on the surface of the sheet metal to adjust its position.

[0055] As the presser foot block 304 continues to press down and approaches the surface of the automobile sheet metal, since the presser foot block 304 can undergo a certain distance of lateral displacement outside the fixed sleeve 303, and each floating presser foot 308 can adjust the extension and retraction distance according to the different surface heights of the sheet metal below, when the presser foot block 304 moves downward and approaches the outer surface of the sheet metal, the second ball 3082 at the bottom of the floating presser foot 308 rolls on the surface of the sheet metal and the presser foot block 304 moves laterally in a small range outside the fixed sleeve 303, the presser foot block 304 and the floating presser foot 308 can find the most suitable pressing area on the surface of the automobile sheet metal outside the gun head 2021, providing more balanced pressure.

[0056] And because the ball joint block 301 can change its angle inside the limiting sleeve block 302, even if the pressure foot block 304 is tightly attached to the rear gun head 2021 of the automobile sheet metal and the rivet inside is in an irrational vertical state with the part to be riveted, the angle of the riveting gun 202 can be adjusted by the robotic arm 201 to achieve the angle adjustment of the gun head 2021 and the area to be riveted, thereby avoiding the problems of rivet skewness, asymmetric riveting points, and uneven riveting force distribution caused by the rivet being pressed into the sheet metal, which aggravates the problem of local deformation during riveting of automobile sheet metal parts.

[0057] After the position is adjusted, the second ball 3082 at the bottom of the floating presser foot 308 will retract into the inside of the floating presser foot 308 and contact the automobile sheet metal through the flexible pad 309, thereby preventing indentations on the automobile sheet metal during riveting.

[0058] In summary, when in use, the presser foot block 304 is suspended and installed outside the fixed sleeve 303 through the first ball 3042, and can move horizontally slightly outside the fixed sleeve 303. The moving ring 305 inside the presser foot block 304 is pushed to a high position by the second elastic member 3043. The reset pressure groove 3051 is initially opposite to the reset straight plate 3032. The floating presser foot 308 is extended due to the disc spring group 3081, and the second ball 3082 inside the floating presser foot 308 protrudes from the surface of the flexible pad 309.

[0059] When the robotic arm 201 drives the riveting gun 202 close to the sheet metal, the floating presser foot 308 first contacts the surface, and the second ball 3082 is pushed by the third elastic member 3083 to first contact the surface of the sheet metal and roll, and the auxiliary presser foot block 304 finds the best fitting position when there are bumps on the surface of the sheet metal. After the floating presser foot 308 contacts different positions on the surface of the sheet metal, the compression amount of the disc spring group 3081 in the installation cavity 3071 is different, and the downward extending length is adaptively adjusted. For example, the floating presser foot 308 has a small compression amount in the concave area and a large compression amount in the convex area, ensuring that each presser foot is evenly fitted, avoiding the deformation of the sheet metal due to uneven local pressure of the traditional rigid presser foot, and making the supporting force more evenly distributed during riveting through the elastic compensation of the disc spring group 3081.

[0060] During the pressing process, if the gun head 2021 is not perpendicular to the riveted surface, the pressure foot block 304 and the floating pressure foot 308 are in contact with the surface of the sheet metal. At this time, the ball joint block 301 rotates within the limiting sleeve 302, driving the gun head 2021 to adjust its angle. At the same time, the fixed sleeve 303 slides laterally within the pressure foot block 304 via the first ball 3042 to compensate for the position deviation. This angle adjustment ensures that the rivet is pressed vertically into the sheet metal, avoiding rivet skew and uneven riveting force caused by angle deviation, thereby improving riveting accuracy.

[0061] The presser foot block 304 is then driven to press further downward, and during the downward pressure, the second ball 3082 retracts into the floating presser foot 308, and contacts and protects the surface of the sheet metal part through the flexible pad 309 on the lower surface.

[0062] After the riveting is completed, the airbag 306 inside the presser foot block 304 is inflated through the connecting tube 3061, pushing the moving ring 305 to move downward and squeezing the second elastic member 3043 to deform it. As the airbag 306 expands, it pushes the moving ring 305 to move downward, and the inverted triangular groove edge of the reset groove 3051 on the lower surface of the moving ring contacts the reset straight plate 3032, forcing the presser foot block 304 to slide horizontally back to the initial center position, ensuring the repeatable positioning accuracy of the presser foot block 304, avoiding cumulative errors affecting subsequent riveting, and improving the stability of the equipment's automated operation.

[0063] After the floating presser foot 308 outside the presser foot block 304 is separated from the sheet metal, the disc spring assembly 3081 and the third elastic member 3083 respectively drive it to reset, and the second ball 3082 inside the floating presser foot 308 protrudes again to prepare for the next operation.

[0064] Example 3

[0065] Reference Figures 2 to 4 , which is the third embodiment of the present invention, is implemented based on the previous embodiment.

[0066] Specifically, the guiding component includes a guiding pad 205, which is arranged in a receiving cavity 2031 opened on the inner wall of the conveying cavity 203. A second sliding column 2052 is provided at the end of the guiding pad 205, and the end of the second sliding column 2052 extends to the inner wall of the limiting groove 2032 opened on the inner wall of the receiving cavity 2031 and slides with it.

[0067] A plurality of guide pads 205 are installed in an array inside the accommodating cavity 2031 , and the guide pads 205 as a whole slide inside the accommodating cavity 2031 .

[0068] The surface of the guide pad 205 is provided with an upper inclined surface and a lower inclined surface. Through the lower inclined surface, when the rivet enters the conveying cavity 203, it contacts the rivet rod, forcibly correcting the slight deflection, tilt or rotation of the rivet, and accurately guiding it to the ideal vertical state.

[0069] Preferably, a rotating ring 204 is provided at the end of the accommodating cavity 2031 and an arc groove 2041 is opened on the end surface of the rotating ring 204. A first sliding column 2051 is also provided at the end of the guide pad 205 and the end of the first sliding column 2051 extends to the inner wall of the arc groove 2041 and slides with it.

[0070] Among them, the rotating ring 204 is installed at the bottom of the accommodating cavity 2031, and the arc groove 2041 opened through the surface array cooperates with the first sliding column at the bottom of the guide pad 205. When the guide pad 205 moves inside the accommodating cavity 2031, it will drive the rotating ring 204 to rotate. At the same time, under the influence of the rotating ring 204, the guide pad 205 moves as a whole, and no individual guide pad 205 will slide inside the accommodating cavity 2031.

[0071] Preferably, a first elastic member 206 is further provided on the outer wall of the guide pad 205 and the other end of the first elastic member 206 is provided on the inner wall of the accommodating cavity 2031 . The first elastic member 206 is used to push the guide pad 205 to move into the conveying cavity 203 .

[0072] Among them, the first elastic member 206 on the surface of the guide pad 205 pushes the guide pad 205 to move outward inside the accommodating cavity 2031, and the rivet rod is guided by the lower inclined surface. When the riveting work is performed, the punch rod inside the gun head 2021 retracts the guide pad 205 into the accommodating cavity 2031 when it moves downward, which will not affect the riveting work.

[0073] In summary, during use, under the push of the first elastic member 206, the guide pad 205 extends into the delivery cavity 203, and the lower inclined surface forms a guide angle with the central axis of the cavity. At this time, the rotating ring 204 at the bottom of the accommodating cavity 2031 remains stationary.

[0074] When the rivet enters the conveying cavity 203 in a skewed posture, the rivet rod first contacts the lower inclined surface of the guide pad 205. The multiple guide pads 205 are pushed toward the center synchronously by the first elastic member 206. Under the action of friction, the posture of the rivet is corrected by the lower inclined surface of the guide pad 205 to ensure that the rivet enters the clamp vertically.

[0075] During the riveting operation, the internal punch moves downward and squeezes the upper inclined surface of the guide pad 205 through thrust. The guide pad 205 overcomes the elastic force of the first elastic member 206 and completely retracts into the accommodating cavity 2031. At this time, the rotating ring 204 rotates in the opposite direction to reset. After the guide pad 205 retracts, it maintains a safety gap of 1-2mm with the movement trajectory of the punch to avoid the punch jamming or pad wear due to mechanical interference, thereby ensuring smooth transmission of the riveting force.

[0076] After the riveting is completed, the punch moves upward, and the first elastic member 206 pushes the guide pad 205 to extend again. The rotating ring 204 rotates synchronously under the constraint of the arc groove 2041, so that the pad returns to the initial guide position and waits for the next rivet to be delivered.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A riveting device for automobile sheet metal, characterized by: include: The main assembly (100) comprises a cabinet (101), a workbench (102) and a glue machine (103) provided at the end of the cabinet (101); A riveting assembly (200) provided at the end of the cabinet (101) comprises a mechanical arm (201) and a riveting gun (202) provided at the end of the mechanical arm (201); a gun head (2021) is provided at the end of the riveting gun (202); a conveying cavity (203) is provided on the inner wall of the gun head (2021); and a guiding component is provided on the inner wall of the conveying cavity (203) for correcting the posture of the rivet; The end of the gun head (2021) is also provided with a pressing component, which includes a pressure foot block (304) and a floating pressure foot (308). The floating pressure foot (308) array is arranged on the outer wall of the pressure foot block (304) to be close to the sheet metal and adapt to the plane of the sheet metal.

2. The riveting equipment for automobile sheet metal according to claim 1, characterized in that: The inner wall of the presser foot block (304) is provided with a fixed sleeve (303), and the inner wall of the fixed sleeve (303) is also fixed with a limiting sleeve (302). The inner wall of the limiting sleeve (302) is also provided with a movably provided ball joint block (301), and the ball joint block (301) is fixedly installed on the outer wall of the gun head (2021). The gun head (2021) is movable inside the limiting sleeve (302) via the ball joint block (301) to change the angle between the gun head (2021) and the fixed sleeve (303).

3. The riveting equipment for automobile sheet metal according to claim 2, characterized in that: The outer wall of the fixed sleeve (303) is provided with a fixed ring (3031), and the end of the fixed ring (3031) extends to the end of the mounting plate (3041) fixed to the inner wall of the presser foot block (304); the inner wall of the mounting plate (3041) is provided with a first ball (3042), and the first ball (3042) is attached to the outer wall of the fixed ring (3031); the fixed sleeve (303) moves on the inner wall of the presser foot block (304) through the cooperation between the fixed ring (3031) and the first ball (3042).

4. The riveting equipment for automobile sheet metal according to claim 3, characterized in that: The inner wall of the presser foot block (304) is further provided with a moving ring (305), and the outer wall of the moving ring (305) is in contact with the inner wall of the presser foot block (304); the inner wall of the presser foot block (304) is provided with a second elastic member (3043) for pushing the moving ring (305); the end surface of the moving ring (305) is provided with a reset pressing groove (3051), and the reset pressing groove (3051) is opposite to the reset straight plate (3032) provided at the end of the fixed sleeve (303).

5. The riveting equipment for automobile sheet metal according to claim 4, characterized in that: An air bag (306) is provided at the end of the movement ring (305), and the end of the air bag (306) is connected to a connecting pipe (3061). The connecting pipe (3061) is connected to an external air source and supplies air to the air bag (306) to expand it. When the air bag (306) expands, it pushes the movement ring (305) to move on the inner wall of the presser foot block (304). When the movement ring (305) moves, the presser foot block (304) is driven to reset by cooperating with the reset pressure groove (3051) and the reset straight plate (3032).

6. The riveting equipment for automobile sheet metal according to claim 5, characterized in that: The outer wall of the presser foot block (304) is provided with a mounting sleeve (307), the outer wall of the mounting sleeve (307) is provided with a mounting cavity (3071), the floating presser foot (308) is arranged on the inner wall of the mounting cavity (3071), and the end of the floating presser foot (308) is provided with a disc spring group (3081).

7. The riveting equipment for automobile sheet metal according to claim 6, characterized in that: The inner wall of the floating presser foot (308) is further provided with a second ball (3082), and the end of the second ball (3082) is provided with a third elastic member (3083) to push the second ball (3082), and the end surface of the floating presser foot (308) is further provided with a flexible pad (309).

8. The riveting equipment for automobile sheet metal according to claim 7, characterized in that: The guiding component includes a guiding tile (205), and the guiding tile (205) is arranged in a receiving cavity (2031) opened on the inner wall of the conveying cavity (203). A second sliding column (2052) is provided at the end of the guiding tile (205), and the end of the second sliding column (2052) extends to the inner wall of the limiting groove (2032) opened on the inner wall of the receiving cavity (2031) and slides with it.

9. The riveting equipment for automobile sheet metal according to claim 8, characterized in that: A rotating ring (204) is provided at the end of the accommodating cavity (2031), and an arc groove (2041) is provided on the end surface of the rotating ring (204). A first sliding column (2051) is also provided at the end of the guide pad (205), and the end of the first sliding column (2051) extends to the inner wall of the arc groove (2041) and slides with it.

10. The riveting equipment for automobile sheet metal according to claim 9, characterized in that: The outer wall of the guide pad (205) is further provided with a first elastic member (206), and the other end of the first elastic member (206) is provided on the inner wall of the accommodating cavity (2031). The first elastic member (206) is used to push the guide pad (205) to move into the interior of the conveying cavity (203).

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