Automatic assembling equipment for automobile air duct

Abstract

The utility model relates to automatic assembling equipment for an automobile air duct. The automatic assembling equipment comprises a rack and a rotating table rotationally installed on the rack. The rotation driving mechanism is mounted on the rack, is in transmission connection with the rotating shaft of the rotating table and is used for driving the rotating table to rotate; the supporting blocks are fixedly installed on the rotating table and used for supporting the air pipe from the two sides of the connecting section of the air pipe; the coarse positioning structure is fixedly installed on the rotating table and used for limiting the air pipe from the side face of the air pipe; the fine positioning system is arranged on the rotating table and used for fixing and accurately positioning the air pipe and the rotating table; the automatic mechanical arm is arranged on one side of the rack; and the automatic punching and assembling mechanism is arranged at the movable end of the automatic mechanical arm, so that the labor intensity of operators is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic processing equipment, in particular to an automatic assembly device for automobile air ducts. Background Art

[0002] When the engine of a fuel vehicle is running, an air duct is needed to provide air intake for combustion. The air duct can be divided into circular air duct, rectangular air duct, oblate air duct and other types, and rectangular air duct is mainly used. Since the air duct is long and the flow path is mostly a curved structure, and according to different functional design requirements, the diameters of different positions of the same air duct are often different, making it difficult to form an integral part. Therefore, in order to facilitate the forming of the air duct, the air duct needs to be made in sections and then assembled together.

[0003] For Figure 1 The air duct structure shown includes a first segment, a second segment and a connecting segment. Currently, the air duct is produced by segment forming and then manually assembled. During the forming process, reserved holes are set at the assembly positions at both ends of the connecting segment. When assembling the air duct, the first segment and the second segment are assembled with the two ends of the connecting segment respectively. The operator punches holes according to the positions of the reserved holes, and then installs rivets to assemble the first segment, the second segment and the connecting segment together. This production method has low production efficiency and high labor intensity for operators. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides an automatic assembly equipment for automobile air ducts, thereby reducing the labor intensity of operators and improving production efficiency.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An automatic assembly device for automobile air ducts, comprising:

[0007] A frame and a rotating table rotatably mounted on the frame;

[0008] A rotation drive mechanism, mounted on the frame and drivingly connected to the rotating shaft of the rotating table, for driving the rotating table to rotate;

[0009] A pair of support blocks, fixedly mounted on the rotating platform, for supporting the air duct from both sides of the connecting section of the air duct;

[0010] A coarse positioning structure, fixedly mounted on the rotating platform, for limiting the position of the air duct from the side of the air duct;

[0011] A precise positioning system, disposed on the rotating table, for fixing and precisely positioning the air duct and the rotating table;

[0012] An automatic mechanical arm is arranged on one side of the frame;

[0013] An automatic punching and assembling mechanism is arranged at the movable end of the automatic robotic arm.

[0014] As a further improvement of the above technical solution:

[0015] The rough positioning structure includes:

[0016] An end positioning block, which is fixedly installed on the rotating table and used to limit the position of one end of the air duct in the length direction;

[0017] A side positioning block, which is fixedly installed on the rotating table and used to limit the position of one side of the outer wall of the air duct. The side positioning block matches the outer shape of one end of the air duct.

[0018] An inclined surface matching the surface of the air duct is provided on the support block.

[0019] The fine positioning system includes an end clamping and positioning mechanism and a middle pressing and positioning mechanism;

[0020] The end clamping and positioning mechanism is used to clamp and position the air duct in the length direction, and the middle pressing and positioning mechanism is used to clamp and position the air duct in the cross-sectional direction.

[0021] The end clamping and positioning mechanism includes an end clamping block slidably installed on the rotating table and a linear driving mechanism arranged on the rotating table. The linear driving mechanism is in transmission connection with the end clamping block and is used to drive the end clamping block to move along the length direction of the air duct. The end clamping block matches the outer shape of the other end of the air duct.

[0022] The middle pressing and positioning mechanism includes a pair of rotary and sliding driving mechanisms arranged on the rotating table. The two rotary and sliding driving mechanisms are respectively located on both sides of the air duct. A side clamping block is installed at the movable end of the rotary and sliding driving mechanism. The side clamping block matches the outer shape of the side of the air duct. The rotary and sliding driving mechanism is used to drive the side clamping block to rotate and avoid the air duct, and to drive the side clamping block to move towards the air duct to clamp and position the air duct.

[0023] The cross-section of the air duct is rectangular. An upper pressing surface and a side guiding surface are provided on the side clamping block. The upper pressing surface and the side guiding surface respectively correspond to two adjacent faces of the air duct. The angle between the side guiding surface and the upper pressing surface is an obtuse angle. The junction of the upper pressing surface and the side guiding surface matches the corner of the air duct;

[0024] During the process that the rotary and sliding driving mechanism drives the upper pressing surface to move towards the rotating table, when the side guiding surface contacts the air duct and pushes to adjust the air duct to the proper position, the upper pressing surface presses the air duct on the rotating table.

[0025] The automatic robotic arm is a multi-joint robotic arm.

[0026] The automatic punching and assembly mechanism includes a punching machine and a riveting machine.

[0027] A reserved hole is provided on the connecting section of the air duct;

[0028] On one side of the punching machine, a vision camera and a light source for compensating the ambient brightness are provided. The vision camera is used to determine the position of the reserved hole, and then the control system controls the automatic robotic arm to drive the punching machine to move above the reserved hole and punch through the reserved hole for punching operations.

[0029] The beneficial effects of the present utility model are as follows:

[0030] The structure of the present utility model is compact and reasonable, and the operation is convenient. By setting a rotating table and installing a rough positioning mechanism for roughly positioning the air duct and a fine positioning system for precisely positioning and clamping the air duct on the rotating table, the positioning and clamping as well as rotation of the air duct are realized, which is convenient for the automatic robotic arm to drive the automatic punching and assembly mechanism to perform automatic assembly operations on the air duct, thereby reducing the labor intensity of operators and improving production efficiency.

[0031] At the same time, the present utility model also has the following advantages:

[0032] By providing an upper pressing surface and a side guiding surface on the side clamping block, the angle between the side guiding surface and the upper pressing surface is an obtuse angle, and the upper pressing surface and the side guiding surface respectively correspond to two adjacent faces of the rectangular air duct. When the rotation and sliding driving mechanism drives the upper pressing surface to move towards the rotating table, the side guiding surface contacts the air duct and pushes to adjust the air duct for precise positioning, which can simultaneously achieve pressing and precise positioning and reduce the moving parts of the assembly equipment.

[0033] A vision camera for precisely identifying the reserved hole is provided on the automatic robotic arm. When the reserved holes are retained at both ends of the connecting section, the positioning accuracy of punching is improved, which is convenient for selectively performing manual operations and automatic operations during the production process of the air duct. Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of the air duct in the present utility model.

[0035] Figure 2 It is a schematic structural diagram of the automatic assembly equipment in the present utility model (including the air duct).

[0036] Figure 3 It is a schematic structural diagram of the rotating table and related structures in the present utility model.

[0037] Figure 4 It is a schematic structural diagram of the rotating table and related structures in the present utility model (from another perspective).

[0038] Figure 5 is Figure 4 Local enlarged view at position A in it.

[0039] Figure 6 It is a schematic structural view of the middle pressing and positioning mechanism of the present utility model.

[0040] Figure 7 It is a schematic structural view of the automatic punching and assembling mechanism of the present utility model.

[0041] Among them:

[0042] 1. Air duct; 11. First segment; 12. Connection segment; 121. Fastener; 122. Reserved hole; 13. Second segment; 131. Mounting hole;

[0043] 2. Frame; 3. Rotary drive mechanism; 4. Rotary table; 41. Hole; 5. Support block;

[0044] 6. Fine positioning system;

[0045] 61. End clamping and positioning mechanism; 611. End clamping block; 612. Linear drive mechanism;

[0046] 62. Middle pressing and positioning mechanism; 621. Side clamping block; 622. Upper pressing surface; 623. Side guiding surface; 624. Rotary and sliding drive mechanism;

[0047] 7. Coarse positioning structure; 71. End positioning block; 72. Side positioning block;

[0048] 8. Riveting machine; 9. Punching machine; 91. Light source; 92. Vision camera; 10. Automatic robotic arm. Specific implementation manner

[0049] In the embodiment of the present application, by providing an automatic assembly device for automobile air ducts, the problems of low production efficiency and high labor intensity of operators in the process of air duct assembly in the prior art are solved. The general idea is to position the air duct 1 on a rotary fixture and then use the automatic robotic arm 10 to drive the automatic punching and assembling mechanism to perform automatic punching and the assembly of fasteners.

[0050] Among them, the air duct 1 has a streamlined outer surface. Usually, the air duct 1 is made of rubber material, such as Figure 1As shown in the figure, it is a truck air duct, and the overall cross-section is rectangular; the air duct 1 includes a first section 11, a second section 13, and a connecting section 12. The connecting section 12 is sleeved on the ends of the first section 11 and the second section 13 to connect the first section 11, the second section 13, and the connecting section 12 to form a special-shaped pipe. In the prior art, there are two circles of reserved holes 122 on the connecting section 12, corresponding to the first section 11 and the second section 13 respectively. In the prior art, the operator drills holes on the first section 11 and the second section 13 based on the reserved holes 122, and then uses fasteners 121 to assemble the first section 11, the second section 13, and the connecting section 12 together.

[0051] To better understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0052] Embodiment 1:

[0053] As Figures 2 - 4 shown, the automatic assembly equipment for the automobile air duct of this embodiment includes a frame 2 and a rotating table 4 rotatably installed on the frame 2; it also includes a rotation drive mechanism 3, a pair of support blocks 5, a rough positioning structure 7, a fine positioning system 6, an automatic robotic arm 10, and an automatic punching and assembly mechanism.

[0054] The rotation drive mechanism 3 is installed on the frame 2 and is in transmission connection with the rotating shaft of the rotating table 4 for driving the rotating table 4 to rotate;

[0055] A pair of support blocks 5 are fixedly installed on the rotating table 4 for supporting the air duct 1 from both sides of the connecting section 12 of the air duct 1;

[0056] The rough positioning structure 7 is fixedly installed on the rotating table 4 for limiting the air duct 1 from the side of the air duct 1;

[0057] The fine positioning system 6 is arranged on the rotating table 4 for fixing and precisely positioning the air duct 1 and the rotating table 4;

[0058] The automatic robotic arm 10 is arranged on one side of the frame 2;

[0059] The automatic punching and assembly mechanism is arranged at the movable end of the automatic robotic arm 10.

[0060] The rotating table 4 is used to place the air duct 1; the support blocks 5 mainly support the part of the air duct 1 that needs to be concentratedly punched, that is, the connecting section 12, specifically supporting the ends of the first section 11 and the second section 13. Installation holes 131 also need to be processed on the second section 13 of the air duct 1, but the requirement for positioning accuracy is not high; there is a hole 41 for avoiding the connecting section 12 on the rotating table 4, and the two support blocks 5 are located on both sides of the hole 41, as Figure 5 、 Figure 6 shown.

[0061] The rough positioning structure 7 facilitates the operator to grasp the position of the air duct 1 on the rotating table 4, performs rough positioning of the air duct 1 when placing the air duct 1, and then the fine positioning system 6 precisely adjusts and fixes the position of the air duct 1 on the rotating table 4. After fine positioning, the support blocks 5 evenly support both sides of the connecting section 12 of the air duct 1. The rough positioning structure 7 plays an auxiliary support and limiting role, and the fine positioning system 6 plays a main fixing role, enabling the air duct 1 to withstand the external forces during the punching and assembly process after rotating with the rotating table 4.

[0062] As Figure 3 shown, the rotation axis of the rotating table 4 is consistent with the axial direction of the air duct 1, enabling the outer peripheral surface of the connecting section 12 of the air duct 1 to rotate relative to the automatic punching and assembly mechanism, facilitating the cooperation with the punching and assembly mechanism and improving the assembly efficiency.

[0063] The automatic robotic arm 10 drives the automatic punching and assembly mechanism to move relative to the positioned air duct 1 for punching and assembly operations. In this embodiment, the connecting section 12 of the air duct 1 may not be provided with a reserved hole 122 during forming. When the air duct 1 is positioned, direct punching can be performed, and then the fastener 121 can be assembled. Through the rough positioning structure 7 and the fine positioning system 6, the positioning accuracy of the air duct 1 for each assembly operation is ensured, the punching position is ensured to be within a certain reasonable range, and the distance from the edge of the connecting section 12 is avoided being too close or deviating from the connecting section 12.

[0064] When debugging the automatic assembly equipment for automotive air ducts, set the walking trajectory of the movable end of the automatic robotic arm 10 in the control system to correspond to the assembly positions of the connecting sections 12 in different orientations on the rotating table 4. During the assembly operation, drill holes at the connecting sections 12 in different positions, and then install the fasteners 121 at the drilled hole positions.

[0065] By providing the rotating table 4 and installing a rough positioning mechanism for roughly positioning the air duct 1 and a fine positioning system 6 for precisely positioning and clamping the air duct 1 on the rotating table 4, the positioning, clamping, and rotation of the air duct 1 are realized, facilitating the automatic robotic arm 10 to drive the automatic punching and assembly mechanism to perform automatic assembly operations on the air duct 1, thereby reducing the labor intensity of the operator and improving the production efficiency.

[0066] Furthermore, as Figures 3 - 4 shown, the rough positioning structure 7 includes: an end positioning block 71 and a side positioning block 72. The end positioning block 71 is fixedly installed on the rotating table 4 and is used to limit the position of one end of the air duct 1 in the length direction; the side positioning block 72 is fixedly installed on the rotating table 4 and is used to limit the position of one side of the outer wall of the air duct 1, and the side positioning block 72 matches the outer shape of one end of the air duct 1.

[0067] Specifically, the end positioning block 71 includes a first baffle and a first support block, which are L-shaped as a whole. The first baffle is used to limit the position of the end of the air duct 1, and the first support block matches the side shape of the end of the air duct 1, and is used to support the air duct 1 from the bottom; the side positioning block 72 includes a second baffle and a second support block, which are L-shaped as a whole. The second baffle is used to limit the position of one side of the tubular outer wall of the air duct 1, and the limiting direction of the second baffle is perpendicular to the limiting direction of the first baffle, both are horizontal directions, and the second support block matches the side shape of the middle part of the air duct 1, and is used to support the air duct 1 from the bottom.

[0068] Further, if Figure 3 As shown, the support block 5 is provided with an inclined surface matching the surface of the air duct 1 .

[0069] like Figure 1 As shown, the diameter of the connecting section 12 is relatively large, and the connection between the first section 11, the second section 13 and the connecting section 12 has a transition surface with a necking structure. The inclined surface on the support block 5 cooperates with the transition surface, which not only plays a role in limiting support, but also facilitates the movement of the air duct 1 relative to the support block 5 during the precise positioning process.

[0070] Further, if Figures 3 - 6 As shown, the precision positioning system 6 includes an end clamping positioning mechanism 61 and a middle pressing positioning mechanism 62;

[0071] The end clamping and positioning mechanism 61 is used to clamp and position the air duct 1 in the length direction, and the middle clamping and positioning mechanism 62 is used to clamp and position the air duct 1 in the cross-sectional direction.

[0072] Specifically, the cross-sectional direction is the flow cross-sectional area of the air duct 1 that is perpendicular to the length direction.

[0073] like Figures 3 - 5 As shown, the end clamping positioning mechanism 61 includes an end clamping block 611 slidably mounted on the rotating table 4, and a linear driving mechanism 612 arranged on the rotating table 4. The linear driving mechanism 612 is transmission-connected to the end clamping block 611 and is used to drive the end clamping block 611 to move along the length direction of the air duct 1. The end clamping block 611 matches the shape of the other end of the air duct 1.

[0074] Specifically, the end clamping block 611 is a contoured groove structure that matches the shape of the end of the air duct 1. When the end clamping block 611 clamps the air duct 1, it also circumferentially limits the end of the air duct 1; the linear drive mechanism 612 can be an ordinary cylinder.

[0075] like Figures 2 - 4 , Figure 6As shown in the figure, the middle pressing and positioning mechanism 62 includes a pair of rotary sliding driving mechanisms 624 arranged on the rotary table 4. The two rotary sliding driving mechanisms 624 are respectively located on both sides of the air duct 1. The movable end of the rotary sliding driving mechanism 624 is equipped with a side clamping block 621. The side clamping block 621 matches the side shape of the air duct 1. The rotary sliding driving mechanism 624 is used to drive the side clamping block 621 to rotate and avoid the air duct 1, and to drive the side clamping block 621 to move towards the air duct 1 to clamp and position the air duct 1.

[0076] As Figure 6 shown, the side clamping block 621 is integrally L-shaped. The two side clamping blocks 621 and the rotary table 4 form a non-closed annular structure for limiting in the cross-section direction of the air duct 1. The rotary sliding driving mechanism 624 can be a corner pressing cylinder or a combination mechanism of an ordinary cylinder and a rotary cylinder to realize the rotary motion and linear motion of the side clamping block 621. Specifically, the side clamping block 621 rotates in a plane parallel to the rotary table 4, and the side clamping block 621 moves linearly closer to and away from the rotary table 4.

[0077] As Figure 1 、 Figure 6 shown, the cross-section of the air duct 1 is rectangular. The side clamping block 621 is provided with an upper pressing surface 622 and a side guiding surface 623. The upper pressing surface 622 and the side guiding surface 623 respectively correspond to two adjacent faces of the air duct 1. The angle between the side guiding surface 623 and the upper pressing surface 622 is an obtuse angle. The junction of the upper pressing surface 622 and the side guiding surface 623 matches the corner of the air duct 1.

[0078] During the process that the rotary sliding driving mechanism 624 drives the upper pressing surface 622 to move towards the rotary table 4, the side guiding surface 623 contacts the air duct 1 and pushes to adjust the air duct 1 to move into place. Then, the upper pressing surface 622 presses the air duct 1 on the rotary table 4.

[0079] During the use of the automatic assembly equipment for automotive air ducts in this embodiment, the operation method is as follows:

[0080] Manually place the air duct 1 on the rotary table 4. At this time, the automatic assembly equipment is in the initial state.

[0081] In the initial state, the side clamping block 621 is located at a position far from the rotary table 4 and rotates to a position to avoid the air duct 1. At this time, the distance between the two side clamping blocks 621 is greater than the width of the air duct 1, which is convenient for placing the air duct 1 on the rotary table 4.

[0082] When placing the air duct 1, one end of the air duct 1 is abutted against the end positioning block 71, and one side of the air duct 1 is abutted against the side positioning block 72. The air duct 1 is preliminarily positioned on the rough positioning structure 7 and the support block 5.

[0083] Start the rotary sliding drive mechanism 624 to drive the two side clamping blocks 621 to rotate above the air duct 1;

[0084] Start the rotary sliding drive mechanism 624 and the linear drive mechanism 612 for fine positioning;

[0085] During the fine positioning process, the rotary sliding drive mechanism 624 drives the side clamping block 621 to move towards the rotary table 4. If the air duct 1 deviates in different directions, the side clamping block 621 that first contacts the air duct 1 is different. During the contact process between the side guide surface 623 and one side of the air duct 1, the side guide surface 623 pushes the air duct 1 to adjust the position of the air duct 1 in the cross-sectional direction relative to the rotary table 4. When in place, the upper pressing surface 622 just presses on the upper surface of the air duct 1;

[0086] During the fine positioning process, the end clamping and positioning mechanism 61 and the middle pressing and positioning mechanism 62 act simultaneously. When the upper pressing surface 622 just presses on the upper surface of the air duct 1, the side positioning block 72 and the end clamping block 611 clamp and position the air duct 1 in the longitudinal direction;

[0087] After the fine positioning is completed, the automatic robotic arm 10 drives the automatic punching and assembly mechanism to punch holes and install fasteners 121 on the side of the connecting section 12 facing the automatic punching and assembly mechanism. When the operation on this side is completed, the rotary table 4 rotates 90 degrees to perform the assembly operation on the other side.

[0088] By providing the upper pressing surface 622 and the side guide surface 623 on the side clamping block 621, the angle between the side guide surface 623 and the upper pressing surface 622 is an obtuse angle, and the upper pressing surface 622 and the side guide surface 623 respectively correspond to two adjacent faces of the rectangular air duct 1. When the rotary sliding drive mechanism 624 drives the upper pressing surface 622 to move towards the rotary table 4, the side guide surface 623 contacts the air duct 1 and pushes to adjust the air duct 1 for fine positioning, which can simultaneously achieve pressing and fine positioning and reduce the moving parts of the assembly equipment.

[0089] Embodiment 2:

[0090] The automatic assembly equipment for automotive air ducts in this embodiment is further improved in terms of the punching and assembly operations on the basis of Embodiment 1.

[0091] As Figure 2 shown, the automatic robotic arm 10 is a multi-joint robotic arm.

[0092] The automatic punching and assembly mechanism includes a punching machine 9 and a riveting machine 8.

[0093] Specifically, the punching machine 9 and the riveting machine 8 are installed on the mounting plate at the end of the automatic robotic arm 10. When punching is required, the mounting plate rotates to make the punching machine 9 face the air duct 1, as Figure 7As shown; when it is necessary to assemble the fastener 121, the mounting plate rotates to make the riveting machine 8 face the air duct 1, and the fastener 121 is a rivet.

[0094] As Figure 1 , Figure 7 As shown, a reserved hole 122 is provided on the connecting section 12 of the air duct 1; a vision camera 92 and a light source 91 for compensating the ambient brightness are provided on one side of the drilling machine 9. The vision camera 92 is used to determine the position of the reserved hole 122, and then the control system controls the robotic arm 10 to drive the drilling machine 9 to move above the reserved hole 122 and drill through the reserved hole 122 for drilling operations.

[0095] The automatic assembly equipment for the automotive air duct in this embodiment does not change the forming method of the connecting section 12 of the air duct 1 in the prior art, and reserved holes 122 are reserved at both ends of the connecting section 12, which is convenient for selectively performing manual operations and automatic operations, making the selection of operation methods more flexible.

[0096] The method of placing and positioning and fixing the air duct 1 of the automatic assembly equipment for the automotive air duct in this embodiment is the same as that in the first embodiment. In order to ensure that the drill bit of the drilling machine 9 just passes through the reserved hole 122 during drilling, before drilling, the identification and positioning process of the reserved hole 122 is as follows:

[0097] The sensor for detecting the ambient brightness feeds the current ambient brightness back to the control system, and the control system adjusts the brightness of the light source 91 to make the ambient brightness meet the preset conditions;

[0098] Then the vision camera 92 takes a current image of the air duct 1 and processes the image to obtain the position of the reserved hole 122;

[0099] The control system controls the robotic arm 10 to drive the drilling machine 9 to perform drilling operations according to the position of the reserved hole 122. When the drilling operation on this surface is completed, the mounting plate is rotated to make the riveting machine 8 face the air duct 1, and then the fastener 121 is installed to complete the assembly operation on this surface;

[0100] After rotating the air duct 1, repeat the above steps to perform assembly operations on other surfaces.

[0101] A vision camera 92 for accurately identifying the reserved hole 122 is provided on the robotic arm 10. When the reserved holes 122 are reserved at both ends of the connecting section 12, the positioning accuracy of drilling is improved, which is convenient for selectively performing manual operations and automatic operations during the production process of the air duct 1.

[0102] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims, and within the protection scope of the present invention, any form of modification can be made.

Claims

1. An automatic assembly device for automobile air ducts, characterized in that: include A frame (2) and a rotating table (4) rotatably mounted on the frame (2); A rotary drive mechanism (3) is mounted on the frame (2) and is drivingly connected to the rotating shaft of the rotary table (4) to drive the rotary table (4) to rotate; A pair of support blocks (5) fixedly mounted on the rotating platform (4) and used to support the air duct (1) from both sides of the connecting section (12) of the air duct (1); A coarse positioning structure (7) is fixedly mounted on the rotating platform (4) and is used to limit the position of the air duct (1) from the side of the air duct (1); A precise positioning system (6), arranged on the rotating platform (4), for fixing and precisely positioning the air duct (1) and the rotating platform (4); An automatic mechanical arm (10) is arranged on one side of the frame (2); An automatic punching assembly mechanism is arranged at the movable end of the automatic mechanical arm (10).

2. The automatic assembly equipment for automobile air ducts according to claim 1, characterized in that: The coarse positioning structure (7) comprises: An end positioning block (71), the end positioning block (71) being fixedly mounted on the rotating platform (4) and used for limiting the position of one end of the air duct (1) in the length direction; A side positioning block (72) is fixedly mounted on the rotating platform (4) and is used to limit the position of one side of the outer wall of the air duct (1); the side positioning block (72) matches the shape of one end of the air duct (1).

3. The automatic assembly equipment for automobile air ducts according to claim 1, characterized in that: The support block (5) is provided with an inclined surface matching the surface of the air duct (1).

4. The automatic assembly equipment for automobile air ducts according to claim 1, characterized in that: The precise positioning system (6) comprises an end clamping positioning mechanism (61) and a middle pressing positioning mechanism (62); The end clamping and positioning mechanism (61) is used to clamp and position the air duct (1) in the length direction, and the middle pressing and positioning mechanism (62) is used to clamp and position the air duct (1) in the cross-sectional direction.

5. The automatic assembly equipment for automobile air ducts according to claim 4, characterized in that: The end clamping and positioning mechanism (61) comprises an end clamping block (611) slidably mounted on the rotating table (4), and a linear drive mechanism (612) arranged on the rotating table (4); the linear drive mechanism (612) is transmission-connected to the end clamping block (611) and is used to drive the end clamping block (611) to move along the length direction of the air duct (1); the end clamping block (611) matches the shape of the other end of the air duct (1).

6. The automatic assembly equipment for automotive air ducts according to claim 4, characterized in that: The middle clamping and positioning mechanism (62) comprises a pair of rotating and sliding driving mechanisms (624) arranged on the rotating platform (4), the two rotating and sliding driving mechanisms (624) are respectively located on both sides of the air duct (1), and the movable end of the rotating and sliding driving mechanism (624) is installed with a side clamping block (621), and the side clamping block (621) matches the side shape of the air duct (1). The rotating and sliding driving mechanism (624) is used to drive the side clamping block (621) to rotate to avoid the air duct (1), and drive the side clamping block (621) to move toward the air duct (1) to tighten and position the air duct (1).

7. The automatic assembly equipment for automotive air ducts according to claim 6, characterized in that: The cross-section of the air duct (1) is rectangular. The side clamping block (621) is provided with an upper pressing surface (622) and a side guiding surface (623). The upper pressing surface (622) and the side guiding surface (623) respectively correspond to two adjacent faces of the air duct (1). The angle between the side guiding surface (623) and the upper pressing surface (622) is an obtuse angle. The junction of the upper pressing surface (622) and the side guiding surface (623) matches the corner of the air duct (1). During the process that the rotation and sliding driving mechanism (624) drives the upper pressing surface (622) to move towards the rotating table (4), when the side guiding surface (623) contacts the air duct (1) and pushes to adjust the air duct (1) to move in place, the upper pressing surface (622) presses the air duct (1) onto the rotating table (4).

8. The automatic assembly equipment for automotive air ducts according to claim 1, characterized in that: The automatic robotic arm (10) is a multi-joint robotic arm.

9. The automatic assembly equipment for automobile air ducts according to claim 1, characterized in that: The automatic punching and assembling mechanism includes a punching machine (9) and a riveting machine (8).

10. The automatic assembly equipment for automobile air ducts according to claim 9, characterized in that: A reserved hole (122) is provided on the connection section (12) of the air duct (1). A vision camera (92) and a light source (91) for compensating the ambient brightness are provided on one side of the punching machine (9). The vision camera (92) is used to determine the position of the reserved hole (122). Then, the control system controls the automatic robotic arm (10) to drive the punching machine (9) to move above the reserved hole (122) and punch through the reserved hole (122) for punching operation.

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