A high-precision press riveter

Abstract

The utility model discloses a kind of high machining precision pressure riveter, belong to pressure riveter technical field, including bed, rack is arranged on the bed, the top of the rack is provided with pneumatic cylinder, the bottom of the pneumatic cylinder is installed with pressure riveting head, the inboard of the rack is fixedly connected with U-shaped seat, the top surface of one end of U-shaped seat is installed with pressure riveting seat.The utility model in, before pressure riveting, put pressure riveting nut into the recess in the top end of pressure riveting seat, and using first hydraulic cylinder drives support block to move up, so that the top surface of support block and the embossing tooth top surface of pressure riveting nut are flush, when pressure riveting nut and sheet metal part pressure riveting hole are aligned, the bottom surface of sheet metal part and the top surface of support block are attached, and using second hydraulic cylinder drives extruding block to move down, the periphery of sheet metal part pressure riveting place is preliminarily fixed by extruding block and support block, avoid sheet metal part to appear transverse movement when pressure riveting, with good practicability.

Description

Technical Field

[0001] This utility model relates to the field of riveting machine technology, and more specifically, to a riveting machine with high processing precision. Background Technology

[0002] Riveting is a riveting method that uses the static pressure generated by a press riveting machine to upset the rivet shank and form an upset head. Press riveting produces riveted parts with good surface quality, small deformation, and high connection strength. Therefore, in practice, press riveting is generally preferred as long as the structural manufacturability allows.

[0003] A search revealed that utility model patent CN218639030U discloses a riveting machine. The worktable has a through hole for the riveting die to pass through. Multiple through holes are distributed around the through hole on the worktable surface. Telescopic platforms are slidably installed within these through holes. A ball groove is formed on the upper surface of each telescopic platform, where a ball bearing is rolled and engaged. A drive mechanism connected to the lower surface of the telescopic platform is located below each through hole to drive the telescopic platform in a vertical reciprocating linear motion. During loading, the drive mechanism synchronously drives all telescopic platforms to extend beyond the upper surface of the worktable, so that the ball bearings on all telescopic platforms form a rolling plane above the worktable, allowing the sheet metal parts placed on the worktable to move easily and freely. Throughout the process, loading and unloading sheet metal parts is simpler and faster. Simultaneously, during the riveting process, the riveting head remains perpendicular to the sheet metal part, significantly improving the processing accuracy and quality of the product.

[0004] However, the above-mentioned patents still have the following shortcomings: During the sheet metal riveting process, the sheet metal parts will move down a certain distance, so that the top of the riveting nut or riveting screw on the lower mold is pressed into the riveting hole on the sheet metal parts. The above-mentioned patents use a convex ring to support the sheet metal parts. During riveting, the area around the riveting hole needs to move down for riveting, which can easily lead to poor riveting quality and, in severe cases, deformation of the sheet metal parts. In addition, although ball bearings can assist the sheet metal parts in moving, some sheet metal parts that are riveted have bends. The ball bearings on the worktable are fixed in position, which makes it difficult to move the bent sheet metal parts. Therefore, we have proposed a riveting machine with high processing precision. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a high-precision riveting machine.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A high-precision riveting machine includes a base, a frame mounted on the base, a pneumatic cylinder at the top of the frame, a riveting head at the bottom of the pneumatic cylinder, a U-shaped seat fixedly connected to the inner side of the frame, a riveting seat mounted on the top surface of one end of the U-shaped seat, a position adjustment mechanism on the U-shaped seat, a lower U-shaped frame and an upper U-shaped frame on the position adjustment mechanism, first hydraulic cylinders fixedly mounted on both sides of the lower U-shaped frame, lower lifting seats fixedly connected to the tops of the two first hydraulic cylinders, two first air rods fixedly mounted on the two lower lifting seats, a support block fixedly connected to the top of each pair of first air rods, second hydraulic cylinders fixedly mounted on both sides of the upper U-shaped frame, upper lifting seats fixedly connected to the bottoms of the two second hydraulic cylinders, two second air rods fixedly mounted on the two upper lifting seats, a pressing block fixedly connected to the bottom of each pair of second air rods, and two support mechanisms on the top surface of the base.

[0008] In a preferred embodiment of this utility model, the support mechanism includes a movable frame fixedly connected to the top surface of the base. A second one-way lead screw is rotatably connected to the inner cavity of the movable frame. A second motor is fixedly installed on the side of the movable frame. The output shaft of the second motor is connected to the end of the second one-way lead screw. A movable frame is threaded onto the outer side of the second one-way lead screw. One end of the movable frame extends to the front of the base and is fixedly connected to a third hydraulic cylinder. A movable box is fixedly connected to the top of the third hydraulic cylinder. A two-way lead screw is rotatably connected to the inner cavity of the movable box. Movable seats are threaded onto the outer sides of both ends of the two-way lead screw. A third motor is fixedly installed at the end of the movable box. The output shaft of the third motor is connected to the end of the two-way lead screw. Support cylinders are fixedly connected to the top surfaces of the two movable seats. Springs are fixedly connected to the bottom surfaces of the inner cavities of the two support cylinders. Support columns are fixedly connected to the tops of the two springs. A ball bearing is sleeved on the top of the support column.

[0009] As a preferred embodiment of this utility model, the position adjustment mechanism includes two moving slots and two mounting slots formed on the U-shaped seat. The inner cavities of the two moving slots are respectively rotatably connected to a first one-way lead screw. The inner walls of the two mounting slots are respectively fixedly installed with a first motor. The output shafts of the two first motors are respectively connected to the ends of the two first one-way lead screws. The lower U-shaped frame and the upper U-shaped frame are respectively slidably connected to the inner cavities of the two moving slots. One first one-way lead screw is threadedly sleeved with the lower U-shaped frame, and the other first one-way lead screw is threadedly sleeved with the upper U-shaped frame.

[0010] In a preferred embodiment of this utility model, two sliding rods are fixedly sleeved in the inner cavity of the movable frame, and the sliding rods are movably sleeved with the movable frame. The top and bottom surfaces of the movable frame are respectively in contact with the top and bottom surfaces of the inner cavity of the movable frame.

[0011] In a preferred embodiment of this utility model, the inner wall of the movable box is fitted with the side of the movable seat, and the outer side of the support column is fitted with the inner wall of the support cylinder.

[0012] As a preferred embodiment of this utility model, the top and bottom surfaces of the lower U-shaped frame and the upper U-shaped frame are respectively fitted to the top and bottom surfaces of the inner cavities of the two movable slots.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) In this utility model, before riveting, the riveting nut is placed into the groove at the top of the riveting seat, and the first hydraulic cylinder drives the support block to move upward, so that the top surface of the support block and the top surface of the embossed teeth of the riveting nut are flush. When the riveting nut and the riveting hole of the sheet metal part are aligned, the bottom surface of the sheet metal part and the top surface of the support block are in contact. The second hydraulic cylinder drives the extrusion block to move downward. The extrusion block and the support block are used to initially fix the periphery of the riveting part of the sheet metal part, so as to avoid the sheet metal part from moving laterally during riveting. During riveting, the air cylinder drives the riveting head to move downward and pushes the sheet metal part downward, so that the embossed teeth of the riveting nut are pressed into the riveting hole. During the riveting process, the support block overcomes the elasticity of the first air rod and moves downward synchronously, which can effectively prevent the sheet metal part from deforming.

[0015] (2) In this utility model, four rolling balls distributed on both sides provide auxiliary support for the sheet metal parts, avoiding the bending of the sheet metal parts from affecting their movement. In addition, the distance between the rolling balls on both sides is adjusted by the threaded engagement between the two second one-way screws and the moving frame, so as to adapt to support sheet metal parts of different lengths. At the same time, the distance between the two rolling balls on one side is adjusted by the threaded engagement between the two-way screw and the movable seat, so as to adapt to support sheet metal parts of different widths, which has good practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the installation of the lower U-shaped frame and the upper U-shaped frame of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the U-shaped seat of this utility model;

[0019] Figure 4 This is a schematic diagram of the lower U-shaped frame of this utility model;

[0020] Figure 5 This is a schematic diagram of the U-shaped frame structure of this utility model;

[0021] Figure 6This is a cross-sectional schematic diagram of the movable frame of this utility model;

[0022] Figure 7 This is a cross-sectional schematic diagram of the support cylinder of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1. Base; 2. Frame; 3. Pneumatic cylinder; 4. Riveting head; 5. U-shaped seat; 6. Riveting seat; 7. Position adjustment mechanism; 8. Lower U-shaped frame; 9. Upper U-shaped frame; 10. Support mechanism; 11. First hydraulic cylinder; 12. Lower lifting seat; 13. First air rod; 14. Support block; 15. Second hydraulic cylinder; 16. Upper lifting seat; 17. Second air rod; 18. Extrusion block; 19. Moving frame; 20. Second one-way lead screw; 21. Second motor; 22. Moving frame; 23. Third hydraulic cylinder; 24. Movable box; 25. Two-way lead screw; 26. Third motor; 27. Movable seat; 28. Support cylinder; 29. ​​Spring; 30. Support column; 31. Ball bearing; 32. Slide rod; 33. Mounting slot; 34. Moving slot; 35. First one-way lead screw; 36. First motor. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example:

[0029] Please see Figure 1-7 A high-precision riveting machine includes a base 1, a frame 2 mounted on the base 1, a pneumatic cylinder 3 mounted at the top of the frame 2, a riveting head 4 mounted at the bottom of the pneumatic cylinder 3, a U-shaped seat 5 fixedly connected to the inner side of the frame 2, a riveting seat 6 mounted on the top surface of one end of the U-shaped seat 5, a position adjustment mechanism 7 mounted on the U-shaped seat 5, a lower U-shaped frame 8 and an upper U-shaped frame 9 mounted on the position adjustment mechanism 7, and first hydraulic cylinders 11 fixedly mounted on both sides of the lower U-shaped frame 8, with the tops of the two first hydraulic cylinders 11 respectively fixedly connected to... There is a lower lifting seat 12, and two first air rods 13 are fixedly installed on the two lower lifting seats 12 respectively. A support block 14 is fixedly connected to the top of each pair of first air rods 13. Second hydraulic cylinders 15 are fixedly installed on both sides of the upper U-shaped frame 9 respectively. The bottom ends of the two second hydraulic cylinders 15 are fixedly connected to the upper lifting seat 16 respectively. Two second air rods 17 are fixedly installed on the two upper lifting seats 16 respectively. A pressing block 18 is fixedly connected to the bottom end of each pair of second air rods 17. Two support mechanisms 10 are provided on the top surface of the machine base 1.

[0030] In this embodiment, the top surface of the rivet base 6 is provided with a groove for placing the rivet nut and rivet screw.

[0031] For details, please refer to Figure 1 , Figure 6 and Figure 7 The support mechanism 10 includes a movable frame 19 fixedly connected to the top surface of the base 1. A second one-way screw 20 is rotatably connected to the inner cavity of the movable frame 19. A second motor 21 is fixedly mounted on the side of the movable frame 19. The output shaft of the second motor 21 is connected to the end of the second one-way screw 20. A movable frame 22 is threaded onto the outer side of the second one-way screw 20. One end of the movable frame 22 extends to the front of the base 1 and is fixedly connected to a third hydraulic cylinder 23. A movable box 24 is fixedly connected to the top of the third hydraulic cylinder 23. The inner cavity of the box 24 is rotatably connected to a bidirectional lead screw 25. Movable seats 27 are threaded onto the outer sides of both ends of the bidirectional lead screw 25. A third motor 26 is fixedly installed at the end of the movable box 24. The output shaft of the third motor 26 is connected to the end of the bidirectional lead screw 25. Support cylinders 28 are fixedly connected to the top surfaces of the two movable seats 27. Springs 29 are fixedly connected to the bottom surfaces of the inner cavities of the two support cylinders 28. Support columns 30 are fixedly connected to the top ends of the two springs 29. A ball bearing 31 is sleeved on the top end of the support column 30.

[0032] In this embodiment, the lateral position of the moving frame 22, movable box 24, support cylinder 28 and ball bearing 31 is adjusted by the threaded engagement between the second unidirectional lead screw 20 and the moving frame 22, so as to support sheet metal parts of different lengths. In addition, the distance between the two support cylinders 28 can be adjusted by the threaded engagement between the bidirectional lead screw 25 and the two movable seats 27, so that the two ball bearings 31 can support sheet metal parts of different widths.

[0033] For details, please refer to Figures 1 to 5 The position adjustment mechanism 7 includes two moving slots 34 and two mounting slots 33 formed on the U-shaped seat 5. The inner cavities of the two moving slots 34 are respectively rotatably connected to a first one-way lead screw 35. The inner walls of the two mounting slots 33 are respectively fixedly installed with a first motor 36. The output shafts of the two first motors 36 are respectively connected to the ends of the two first one-way lead screws 35. The lower U-shaped frame 8 and the upper U-shaped frame 9 are respectively slidably connected to the inner cavities of the two moving slots 34. One first one-way lead screw 35 is threadedly sleeved with the lower U-shaped frame 8, and the other first one-way lead screw 35 is threadedly sleeved with the upper U-shaped frame 9.

[0034] In this embodiment, the first motor 36 drives the first one-way lead screw 35 to rotate. The threaded engagement between the first one-way lead screw 35 and the lower U-shaped frame 8, and between the first one-way lead screw 35 and the upper U-shaped frame 9 drives the lower U-shaped frame 8 and the upper U-shaped frame 9 to move. When the support block 14 is not used to support the sheet metal part, the support block 14 and the pressing block 18 can be moved to the rear side of the pressing seat 6 and the pressing head 4.

[0035] For details, please refer to Figure 6 The inner cavity of the movable frame 19 is fixedly fitted with two slide rods 32. The slide rods 32 and the movable frame 22 are movably fitted together. The top and bottom surfaces of the movable frame 22 are respectively in contact with the top and bottom surfaces of the inner cavity of the movable frame 19.

[0036] In this embodiment, the movable frame 22 is limited by the movable cooperation between the slide bar 32 and the movable frame 22, so that the movable frame 22 can only move along the axial direction of the second one-way lead screw 20.

[0037] For details, please refer to Figure 6 The inner wall of the movable box 24 fits against the side of the movable seat 27, and the outer side of the support column 30 fits against the inner wall of the support cylinder 28.

[0038] In this embodiment, the inner wall of the movable box 24 is used to limit the movable seat 27, so that the movable seat 27 can only move along the axial direction of the bidirectional lead screw 25. In addition, the inner wall of the support cylinder 28 is used to limit the support column 30, so that the support column 30 is stable in the inner cavity of the support cylinder 28.

[0039] For details, please refer to Figure 2The top and bottom surfaces of the lower U-shaped frame 8 and the upper U-shaped frame 9 are respectively in contact with the top and bottom surfaces of the inner cavities of the two moving slots 34.

[0040] In this embodiment, the top and bottom surfaces of the inner cavity of the moving groove 34 are used to limit the lower U-shaped frame 8 and the upper U-shaped frame 9, so that the lower U-shaped frame 8 and the upper U-shaped frame 9 can only move along the axial direction of the first one-way lead screw 35.

[0041] Working principle: In use, firstly, place the rivet nut in the groove on the top surface of the rivet base 6, and start the two first motors 36 to drive the two first one-way lead screws 35 to rotate. Through the transmission between the two first one-way lead screws 35 and the lower U-shaped frame 8 and the upper U-shaped frame 9, the support block 14 is moved to the side of the rivet base 6, and the pressing block 18 is moved to the side of the rivet head 4. In addition, start the first hydraulic cylinder 11 to drive the lower lifting seat 12, the first air rod 13 and the support block 14 to move upward, so that the top surface of the support block 14 is flush with the top surface of the knurled teeth of the rivet nut. Then, start the two second motors 21 to drive the two second one-way lead screws 20 to rotate. Through the transmission between the second one-way lead screws 20 and the moving frame 22, the support block 14 is moved to the side of the rivet base 6, and the pressing block 18 is moved to the side of the rivet head 4. The threaded engagement drives the movable frame 22, movable box 24, support cylinder 28, and ball bearings 31 to move laterally, so that the distance between the ball bearings 31 on both sides matches the length of the sheet metal part. Simultaneously, the third motor 26 is activated to rotate the double-acting screw 25. Through the threaded engagement between the double-acting screw 25 and the movable seat 27, the two support cylinders 28 are brought closer together, so that the distance between the ball bearings 31 at the top of the two support cylinders 28 matches the width of the sheet metal part. Then, the third hydraulic cylinder 23 is activated to move the movable box 24, support cylinder 28, and ball bearings 31 upwards, so that the top of the ball bearings 31 moves above the riveting seat 6, and simultaneously positions the top of the ball bearings 31 below the riveting head 4, in order to rivet the sheet metal part. The sheet metal part is placed on four rollers 31, which assist in its movement. This ensures that the riveting holes on the sheet metal part are aligned vertically with the riveting nuts on the riveting seat 6. Supporting the sheet metal part solely with the four rollers 31 avoids the impact of bending. Finally, the four third hydraulic cylinders 23 are activated to move the movable box 24, support cylinder 28, rollers 31, and sheet metal part downwards, aligning the top surface of the embossed teeth of the riveting nut with the bottom end of the riveting hole on the sheet metal part. At this point, the bottom surface of the sheet metal part is flush with the top surface of the support block 14. The support block 14 then supports the area around the riveting holes on the sheet metal part. The second hydraulic cylinder 15 is then activated to move the lifting seat 16 and the second air rod 17. The pressing block 18 moves downward, so that the bottom surface of the pressing block 18 and the top surface of the sheet metal part are in contact. The sheet metal part is initially fixed by the cooperation of the pressing block 18 and the support block 14, so that the pneumatic cylinder 3 can be activated to drive the riveting head 4 to move downward. The riveting head 4 presses the upper part of the riveting hole on the sheet metal part, so that the riveting hole of the sheet metal part is pressured from top to bottom. This causes the knurled teeth of the riveting nut to be pressed into the riveting hole. In addition, during the riveting process, the sheet metal part moves downward. At the same time, when the sheet metal part moves downward, the support block 14 moves downward in sync against the elastic force of the first air rod 13. The ball 31 and the support column 30 also move downward in sync against the elastic force of the spring 29, so as to avoid deformation of the riveting part. The riveting operation is thus completed.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A high-precision riveting machine, comprising a base (1), characterized in that: A frame (2) is provided on the base (1). A pneumatic cylinder (3) is provided at the top of the frame (2). A riveting head (4) is installed at the bottom of the pneumatic cylinder (3). A U-shaped seat (5) is fixedly connected to the inner side of the frame (2). A riveting seat (6) is installed on the top surface of one end of the U-shaped seat (5). A position adjustment mechanism (7) is provided on the U-shaped seat (5). A lower U-shaped frame (8) and an upper U-shaped frame (9) are provided on the position adjustment mechanism (7). A first hydraulic cylinder (11) is fixedly installed on both sides of the lower U-shaped frame (8). A lower lifting seat is fixedly connected to the top of the two first hydraulic cylinders (11). (12) Two first air rods (13) are fixedly installed on the two lower lifting seats (12). A support block (14) is fixedly connected to the top of each pair of first air rods (13). Two second hydraulic cylinders (15) are fixedly installed on both sides of the upper U-shaped frame (9). The bottom ends of the two second hydraulic cylinders (15) are fixedly connected to the upper lifting seat (16). Two second air rods (17) are fixedly installed on the two upper lifting seats (16). A pressing block (18) is fixedly connected to the bottom end of each pair of second air rods (17). Two support mechanisms (10) are provided on the top surface of the machine base (1).

2. The high-precision riveting machine according to claim 1, characterized in that: The support mechanism (10) includes a movable frame (19) fixedly connected to the top surface of the base (1). A second one-way screw (20) is rotatably connected to the inner cavity of the movable frame (19). A second motor (21) is fixedly installed on the side of the movable frame (19). The output shaft of the second motor (21) is connected to the end of the second one-way screw (20). A movable frame (22) is threaded onto the outer side of the second one-way screw (20). One end of the movable frame (22) extends to the front of the base (1) and is fixedly connected to a third hydraulic cylinder (23). A movable box (24) is fixedly connected to the top of the third hydraulic cylinder (23). The inner cavity of the box (24) is rotatably connected to a bidirectional lead screw (25). The outer sides of both ends of the bidirectional lead screw (25) are respectively threaded with movable seats (27). The end of the movable box (24) is fixedly installed with a third motor (26). The output shaft of the third motor (26) is connected to the end of the bidirectional lead screw (25). The top surfaces of the two movable seats (27) are respectively fixedly connected with support cylinders (28). The bottom surfaces of the inner cavities of the two support cylinders (28) are respectively fixedly connected with springs (29). The top ends of the two springs (29) are respectively fixedly connected with support columns (30). The top ends of the support columns (30) are fitted with ball bearings (31).

3. The high-precision riveting machine according to claim 1, characterized in that: The position adjustment mechanism (7) includes two moving slots (34) and two mounting slots (33) opened on the U-shaped seat (5). The inner cavities of the two moving slots (34) are respectively rotatably connected to the first one-way screws (35). The inner walls of the two mounting slots (33) are respectively fixedly installed with the first motors (36). The output shafts of the two first motors (36) are respectively connected to the ends of the two first one-way screws (35). The lower U-shaped frame (8) and the upper U-shaped frame (9) are respectively slidably connected to the inner cavities of the two moving slots (34). One of the first one-way screws (35) is threadedly connected to the lower U-shaped frame (8), and the other of the first one-way screws (35) is threadedly connected to the upper U-shaped frame (9).

4. The high-precision riveting machine according to claim 2, characterized in that: The inner cavity of the movable frame (19) is fixedly fitted with two sliding rods (32), and the sliding rods (32) are movably fitted with the movable frame (22). The top and bottom surfaces of the movable frame (22) are respectively in contact with the top and bottom surfaces of the inner cavity of the movable frame (19).

5. A high-precision riveting machine according to claim 2, characterized in that: The inner wall of the movable box (24) and the side of the movable seat (27) are in contact with each other, and the outer side of the support column (30) and the inner wall of the support cylinder (28) are in contact with each other.

6. A high-precision riveting machine according to claim 3, characterized in that: The top and bottom surfaces of the lower U-shaped frame (8) and the upper U-shaped frame (9) are respectively in contact with the top and bottom surfaces of the inner cavities of the two moving slots (34).

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