A fully automatic hydraulic riveting machine

Abstract

A kind of full-automatic hydraulic riveting machine, including C-shaped frame (1), the bottom of the C-shaped frame (1) is provided with riveting mechanism (2), the top of C-shaped frame (1) is provided with the socket head lifting mechanism (3) above riveting mechanism (2), the riveting mechanism (2) include the hydraulic cylinder (4) fixedly connected with C-shaped frame (1), the inner cavity of hydraulic cylinder (4) is provided with piston (5), the top of piston (5) is provided with piston rod (6), the top of piston rod (6) is fixedly connected with the bottom of riveting head (7), the top of riveting head (7) is movably connected with the lower end clamp (8) of sleeve structure, spring (10) is sleeved on riveting head (7), the top of spring (10) and the bottom of lower end clamp (8) face contact, bottom is then set in the limit disc (11) of riveting head (7) bottom contact.

Description

Technical Field

[0001] The utility model relates to the field of automatic assembly, in particular to a full-automatic hydraulic riveting machine. Background Art

[0002] The pneumatic riveting gun is one of the most commonly used hand tools in the riveting mechanization process and has been widely used in the riveting of light alloy mechanisms. However, limited by the throat depth and riveting stroke of the bow arm of the pneumatic riveting gun, larger or longer workpieces cannot complete the riveting due to interference with the structure of the pneumatic riveting gun itself. Therefore, for some complex structures, a hydraulic riveting machine needs to be used to achieve the riveting operation.

[0003] In some special fields, relatively high requirements are placed on the quality of riveting. Specific requirements are made for parameters such as the thickness of the rivet after riveting and the diameter of the deformed rivet. Only when the above requirements are met can it be judged as a qualified product. When the traditional riveting machine performs the riveting operation, it will first clamp the two sheets of plates that need to be riveted using a fixture, and then use the riveting machine to perform the riveting operation. In this traditional method, since the clamping position of the fixture is relatively far from the rivet, due to the elastic deformation of the material itself, there is a gap between the two sheets of plates at the rivet connection position. This gap will affect the quality of riveting. Specifically, it will cause the thickness of the rivet after riveting and the diameter of the rivet not to meet the requirements, ultimately affecting the bonding strength between the two sheets of plates.

[0004] Therefore, there is a need for a method or device that can solve the above problems now. Summary of the Invention

[0005] The utility model is to solve the above-mentioned deficiencies existing in the prior art, and proposes a full-automatic hydraulic riveting machine with a simple structure, ingenious design, reasonable layout, and capable of completing the riveting operation with quality and quantity guaranteed.

[0006] The technical solution of the utility model is: a full-automatic hydraulic riveting machine, characterized in that: the riveting machine includes a C-shaped frame 1, a riveting mechanism 2 is arranged at the bottom of the C-shaped frame 1, and a socket head lifting mechanism 3 located above the riveting mechanism 2 is arranged at the top of the C-shaped frame 1.

[0007] The riveting mechanism 2 includes a hydraulic cylinder 4 fixedly connected to the C-shaped frame 1. A piston 5 is arranged in the inner cavity of the hydraulic cylinder 4. A piston rod 6 is arranged at the top end of the piston 5. The top end of the piston rod 6 is fixedly connected to the bottom end of the riveting punch 7. The top of the riveting punch 7 is movably connected to the lower fixture 8 of the sleeve structure. A spring 10 is sleeved outside the riveting punch 7. The top of the spring 10 contacts the bottom end face of the lower fixture 8, and the bottom is in contact with the limit disk 11 at the bottom of the riveting punch 7.

[0008] The aforementioned steamed bun lifting mechanism 3 includes a support sleeve 12 fixedly connected to a C-shaped frame 1. A drive cylinder 13 is provided at the top of the support sleeve 12. The working end of the drive cylinder 13 is connected to a movable shaft 14 movably fitted inside the support sleeve 12. The bottom end of the movable shaft 14 is connected to an upper clamp 15. A pressing steamed bun 16 is provided inside the upper clamp 15. An upper opening 17 is provided on the bottom surface of the pressing steamed bun 16.

[0009] The central axes of the lower clamp 8 and the upper clamp 15 are collinear.

[0010] The C-frame 1 is also equipped with a hydraulic clamping device 9 that can clamp the movable shaft 14.

[0011] The drive cylinder 13 is a servo electric cylinder or a pneumatic cylinder.

[0012] A limiting shaft 19 perpendicular to the riveting head 7 is passed through it. The end of the limiting shaft 19 is movably connected to an elongated hole 20 opened on the outer wall of the lower clamp 8, and the axis of the elongated hole 20 is parallel to the axis of the riveting head 7.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This type of fully automatic hydraulic riveting machine features a simple structure, ingenious design, and reasonable layout. Addressing the problems inherent in traditional riveting machines, it employs a unique structure. A lifting mechanism above the sheet metal drives the riveting head and upper clamp, while a riveting mechanism below the sheet metal drives the lower clamp. During operation, the upper and lower clamps first clamp the two sheets to be riveted, pressing them tightly together under spring pressure. Then, the hydraulic cylinder in the riveting mechanism actuates, moving the riveting head upwards to flatten the end of the rivet, thus achieving the riveting operation. Because the clamps are positioned precisely at the rivet's attachment point, the two sheets remain tightly fitted throughout the riveting process, ensuring effective riveting, improving riveting quality, and enhancing bonding strength. Furthermore, this riveting machine is simple to manufacture and inexpensive, possessing numerous advantages and making it particularly suitable for widespread application in this field, with a very promising market prospect. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 3 This is a cross-sectional view of the steamed bun lifting mechanism in an embodiment of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the riveting mechanism in an embodiment of this utility model.

[0019] Figure 5 This is a cross-sectional view of the riveting mechanism in an embodiment of this utility model.

[0020] Figure 6 yes Figure 4 Enlarged view of part A. Detailed Implementation

[0021] The specific embodiments of this utility model will be described below with reference to the accompanying drawings. Figures 1 to 6 As shown: A fully automatic hydraulic riveting machine includes a C-shaped frame 1 as a base, a riveting mechanism 2 is provided at the bottom of the C-shaped frame 1, and a head lifting mechanism 3 is provided at the top of the C-shaped frame 1 above the riveting mechanism 2.

[0022] The riveting mechanism 2 includes a hydraulic cylinder 4 fixedly connected to the C-frame 1. A piston 5 is disposed in the inner cavity of the hydraulic cylinder 4, and a piston rod 6 is disposed at the top of the piston 5. The top of the piston rod 6 is fixedly connected to the bottom end of the riveting head 7. A lower end clamp 8 with a sleeve structure is movably connected to the top of the riveting head 7. A spring 10 is sleeved on the riveting head 7. The top of the spring 10 contacts the bottom end face of the lower end clamp 8, and the bottom of the spring contacts the limiting plate 11 at the bottom of the riveting head 7.

[0023] The aforementioned steamed bun lifting mechanism 3 includes a support sleeve 12 fixedly connected to a C-shaped frame 1. A drive cylinder 13 is provided at the top of the support sleeve 12. The working end of the drive cylinder 13 is connected to a movable shaft 14 movably fitted inside the support sleeve 12. The bottom end of the movable shaft 14 is connected to an upper clamp 15. A pressing steamed bun 16 is provided inside the upper clamp 15. An upper opening 17 is provided on the bottom surface of the pressing steamed bun 16.

[0024] The central axes of the lower clamp 8 and the upper clamp 15 are collinear.

[0025] The C-frame 1 is also equipped with a hydraulic clamping device 9 that can clamp the movable shaft 14.

[0026] The drive cylinder 13 is a servo electric cylinder or a pneumatic cylinder.

[0027] A limiting shaft 19 perpendicular to the riveting head 7 is passed through it. The end of the limiting shaft 19 is movably connected to an elongated hole 20 opened on the outer wall of the lower clamp 8, and the axis of the elongated hole 20 is parallel to the axis of the riveting head 7.

[0028] The working process of the fully automatic hydraulic riveting machine in this utility model embodiment is as follows: When riveting operation is required, two plates that need to be connected into a whole structure by rivets are first transported to the opening of the C-frame 1 in a state of mutual contact, so that the rivets 18 that have been pre-connected on them can move between the riveting mechanism 2 and the head lifting mechanism 3, and it is necessary to keep the rivets 18, the lower clamp 8 and the upper clamp 15 in a coaxial state.

[0029] After preparation, the control system sends a signal to the riveting machine, and the riveting machine starts working. The hydraulic cylinder 4 works, driving the piston rod 6 and the riveting head 7 to move upward. The lower clamp 8 set at the top of the riveting head 7 will contact the plate below. At the same time, the drive cylinder 13 also works, driving the movable shaft 14 and the upper clamp 15 and the riveting head 16 connected to the bottom of the movable shaft 14 to move downward. The upper clamp 15 will contact the plate above. At this time, the two plates will be pressed together by the lower clamp 8 and the upper clamp 15. The pressing force at this time comes from the elastic force of the spring 10. During the above process, the limiting shaft 19 will move relative to the elongated hole 20, thereby limiting the movement stroke of the lower clamp 8 relative to the riveting head 7.

[0030] After the movement is in place, the control system controls the hydraulic clamp 9 to work, clamp and fix the movable shaft 14 to ensure that the riveting head 7 does not move axially when riveting, and can provide sufficient counter force for the riveting action.

[0031] The hydraulic cylinder 4 continues to drive the riveting head 7 to move upward. The top of the riveting head 7 contacts the rivet 18 and applies pressure to the rivet 18 at the moment of compression. The top of the rivet 18 is located in the upper recess 17 opened on the bottom end face of the riveting head 16, while the bottom receives pressure from the top of the riveting head 7. The top of the rivet 18 cannot move upward relative to the plate under the limiting effect of the upper recess 17, while the bottom is squeezed into a flat disc shape by the riveting head 7, thereby realizing the riveting and fixing of the two plates.

[0032] After the riveting operation is completed, the riveting head 7 moves downward, the hydraulic clamp 9 releases the movable shaft 14, and the riveting head 16 moves upward. The riveting head 16 and the upper clamp 15 will directly leave the plate located above, while the lower clamp 8 will remain in contact with the plate located below for a period of time under the action of the spring 10. Only when the spring 10 stops extending will the lower clamp 8 leave the plate.

[0033] Since the upper and lower clamps are located at the riveting position, the lower clamp 8 is sleeved on the outside of the riveting head 7, and the upper clamp 15 is sleeved on the outside of the riveting head 16. Therefore, it can be ensured that the two plates at the rivet connection are always in close contact, thereby avoiding the influence of the elastic deformation of the plate itself on the riveting operation and ensuring the quality of riveting.

Claims

1. A fully automatic hydraulic riveting machine, characterized in that: The riveting machine includes a C-shaped frame (1), with a riveting mechanism (2) at the bottom of the C-shaped frame (1) and a head lifting mechanism (3) located above the riveting mechanism (2) at the top of the C-shaped frame (1). The riveting mechanism (2) includes a hydraulic cylinder (4) fixedly connected to the C-frame (1). A piston (5) is provided in the inner cavity of the hydraulic cylinder (4). A piston rod (6) is provided at the top of the piston (5). The top of the piston rod (6) is fixedly connected to the bottom of the riveting head (7). The top of the riveting head (7) is movably connected to the lower end clamp (8) of the sleeve structure. A spring (10) is sleeved on the riveting head (7). The top of the spring (10) contacts the bottom end face of the lower end clamp (8), and the bottom is in contact with the limiting plate (11) at the bottom of the riveting head (7). The steamed bun lifting mechanism (3) includes a support sleeve (12) fixedly connected to the C-shaped frame (1). A drive cylinder (13) is provided on the top of the support sleeve (12). The working end of the drive cylinder (13) is connected to a movable shaft (14) that is movably sleeved in the support sleeve (12). An upper clamp (15) is connected to the bottom end of the movable shaft (14). A press-riveted steamed bun (16) is provided in the upper clamp (15). An upper opening (17) is opened on the bottom surface of the press-riveted steamed bun (16). The central axes of the lower clamp (8) and the upper clamp (15) are collinear. The C-frame (1) is also equipped with a hydraulic clamp (9) that can clamp the movable shaft (14).

2. The fully automatic hydraulic riveting machine according to claim 1, characterized in that: The drive cylinder (13) is a servo electric cylinder or a pneumatic cylinder.

3. The fully automatic hydraulic riveting machine according to claim 1, characterized in that: The riveting head (7) is connected to a limiting shaft (19) perpendicular to it. The end of the limiting shaft (19) is movably connected to an elongated hole (20) on the outer wall of the lower clamp (8), and the axis of the elongated hole (20) is parallel to the axis of the riveting head (7).

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