SPR servo self-punching type riveting gun head

Abstract

The embodiment of the utility model provides an SPR servo self-punching type riveting gun head which comprises a lower die and a riveting mechanism, and a tapping mechanism in the riveting mechanism comprises a first sleeve, a second sleeve, an executing mechanism and a driving mechanism; the second sleeve is movably arranged in the first sleeve, and the executing mechanism is arranged in the second sleeve and comprises an executing rod and a transmission assembly; the execution rod is movably arranged relative to the second sleeve and is connected with the driving mechanism through a transmission assembly; the execution rod is fixedly provided with a magnetic piece, and the outer wall face of the second sleeve is provided with a displacement sensor corresponding to the magnetic ring. The displacement sensor is used for detecting the movement process of the magnetic part. The magnetic part is directly arranged on the execution rod, and the movement process of the magnetic part is detected through the displacement sensor outside the second sleeve, so that the rivet tapping depth of the execution rod is more accurately measured, the rivet tapping depth is accurately obtained, and the high efficiency and reliability of the rivet tapping process are ensured.

Description

Technical Field

[0001] This application relates to the field of riveting device technology, and in particular to an SPR servo self-piercing riveting gun head. Background Technology

[0002] Self-Piercing Riveting (SPR) is a key joining process in the automotive industry, its core function being to securely connect two or more metal parts together. This process achieves a strong mechanical connection by applying sufficient pressure to the rivet, causing it to penetrate the parts to be joined and form a mechanical locking structure. A crucial factor in ensuring the quality and stability of the riveting is the precise positioning of the rivet.

[0003] Currently, self-piercing riveting equipment requires specially designed clamps to hold and position the rivets in one go during the process of feeding them into the parts to be connected, and to precisely control the depth of rivet insertion to ensure riveting quality. However, because the rivets undergo dynamic changes during penetration and locking, and because the structural strength uniformity of the parts to be connected varies at different locations, it is difficult to maintain absolute precision in the rivet position throughout the entire riveting process.

[0004] Therefore, existing technologies often require measuring the rivet penetration depth to monitor the riveting process and evaluate riveting quality. However, while existing servo-driven self-piercing riveting guns can directly calculate the rivet penetration depth based on the servo motor's drive distance, this method, though simple, suffers from poor accuracy due to its indirect measurement, making it unsuitable for high-precision manufacturing. Directly measuring the rivet penetration depth, while achieving extremely high accuracy, requires additional inspection steps, leading to high inspection costs when riveting a large number of rivets. Furthermore, the significant time lag between the inspection result and the actual penetration time makes it unsuitable for high-speed riveting applications. Utility Model Content

[0005] The purpose of this application is to address the problem of poor accuracy in rivet penetration depth detection in existing technologies, which makes it difficult to meet the application scenarios of efficient and precise riveting. Therefore, this application provides an SPR servo self-piercing riveting gun head, which directly sets a magnetic component on the actuator rod and detects the movement of the magnetic component through a displacement sensor outside the second sleeve, thereby more accurately measuring the penetration depth of the rivet by the actuator rod. This ensures the high efficiency and reliability of the rivet penetration process by accurately obtaining the rivet penetration depth.

[0006] This application provides an SPR servo self-piercing riveting gun head, including:

[0007] The lower mold and riveting mechanism are set in opposite directions;

[0008] The lower die and the riveting mechanism are connected by a C-clamp and are positioned opposite each other at both ends of the C-clamp;

[0009] The rivet mechanism includes a rivet nose corresponding to the lower mold, and a rivet feeding mechanism and a rivet tapping mechanism connected to the rivet nose;

[0010] The tapping mechanism includes a first sleeve, a second sleeve, an actuator, and a drive mechanism;

[0011] The first sleeve is fixedly disposed in the C-type clamp, and the second sleeve is movably disposed inside the first sleeve, with one end of the second sleeve fixedly connected to the rivet nose and the other end connected to the drive mechanism;

[0012] The actuator is disposed within the second sleeve and includes an actuator rod and a transmission assembly;

[0013] The actuator is movably disposed relative to the second sleeve and is connected to the drive mechanism via a transmission assembly;

[0014] The actuator is used to drive the rivet inside the rivet nose into the component to be connected;

[0015] The actuator is fixedly equipped with a magnetic component, and the outer wall of the second sleeve is equipped with a displacement sensor corresponding to the magnetic ring; the displacement sensor is used to detect the movement process of the magnetic component.

[0016] In some embodiments, the rivet nose is provided with a through first channel, and the extending direction of the first channel is aligned with the actuator rod;

[0017] A guide rail is provided on one side of the first channel, and the first channel is connected to the rivet feeding mechanism through the guide rail. The rivet feeding mechanism is used to provide rivets to the rivet nose.

[0018] The first channel of the rivet nose is provided with an elastic buffer corresponding to the guide pin track.

[0019] In some embodiments, the nail feeding mechanism includes a nail feeding assembly, a nail feeding track, a nail feeding tube, and a drive cylinder;

[0020] One end of the nail feeding track is connected to the nail guide track via a nail feeding assembly, and the other end is connected to the nail supply tube;

[0021] The drive cylinder is connected to the rivet feeding track and drives the rivets in the rivet feeding track with high-pressure gas.

[0022] The rivet feeding assembly is used to push the rivets in the rivet feeding track into the guide rivet track.

[0023] In some embodiments, the nail feeding mechanism further includes a guide limiting member;

[0024] One side of the guide limiting member is detachably and fixedly connected to the nail feeding track, and the other side is slidably disposed on the outer wall surface of the first sleeve, so that the nail feeding mechanism can move synchronously with the rivet nose.

[0025] In some embodiments, the actuator includes a connecting portion and a tapping portion;

[0026] The tapping part is aligned with the first channel and can extend into the first channel;

[0027] The connecting part is fixedly connected to the transmission assembly and is provided with an annular groove, and the magnetic component is fixedly sleeved in the annular groove.

[0028] In some embodiments, the displacement sensor includes a magnetic sensing element and a signal transmission line;

[0029] The magnetic sensing part is arranged in a strip shape and is attached and fixed to the outer wall of the second sleeve;

[0030] The length direction of the magnetic sensing part is parallel to the extension direction of the first channel;

[0031] The signal transmission line is used to connect to an external control module and transmit the displacement information of the magnetic component.

[0032] In some embodiments, the transmission assembly includes a transmission rod fixedly connected to the rivet nose, and a buffer member and an elastic member sequentially sleeved on the transmission rod;

[0033] One end of the elastic element is fixedly connected to the outer wall of the transmission rod, and the other end abuts against the inner wall of the second sleeve through the buffer element;

[0034] When the drive mechanism drives the second sleeve and the rivet nose to pre-tighten the connection part, the elastic element is stretched;

[0035] When the drive mechanism drives the actuator to drive the rivet in the rivet nose into the part to be connected, the elastic potential energy of the elastic element is released simultaneously.

[0036] Beneficial effects:

[0037] 1. By directly setting a magnetic component on the actuator rod and detecting the movement of the magnetic component through a displacement sensor outside the second sleeve, the driving depth of the actuator rod into the rivet can be measured more accurately, thereby accurately obtaining the rivet driving depth and ensuring the efficiency and reliability of the rivet driving process.

[0038] 2. The first channel is equipped with an elastic buffer corresponding to the guide pin track. When the rivet feeding mechanism feeds the rivet from the guide pin track into the first channel at a relatively high initial velocity, the elastic buffer limits and cushions the rivet, preventing the first channel from being impacted for a long time and reducing its service life; it also improves the durability and reliability of the rivet. At the same time, the elastic buffer can also limit the rivet, preventing it from deflecting or reversing significantly under high-speed impact, thus affecting the continuity and stability of the riveting process. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an SPR servo self-piercing riveting gun head according to an embodiment of this application;

[0040] Figure 2 This is a partial structural diagram of the rivet nose area of ​​an SPR servo self-piercing riveting gun head according to an embodiment of this application.

[0041] Figure 3 This is a cross-sectional view of the actuator area of ​​an SPR servo self-piercing riveting gun head according to an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of the rivet nose of an SPR servo self-piercing riveting gun head according to an embodiment of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Riveting mechanism;

[0045] 10. Riveted nose;

[0046] 11. First channel; 12. Guide pin track; 13. Elastic buffer;

[0047] 20. Nail supply mechanism;

[0048] 21. Nail feeding assembly; 22. Nail feeding track; 23. Nail supply tube; 24. Drive cylinder; 25. Guide limit component;

[0049] 30. Tapping mechanism;

[0050] 31. First sleeve; 32. Second sleeve;

[0051] 330. Implementing agency;

[0052] 331. Actuating rod; 332. Magnetic component; 333. Transmission rod; 334. Buffer component; 335. Elastic component;

[0053] 34. Drive mechanism;

[0054] 35. Displacement sensor;

[0055] 2. Lower mold;

[0056] 3. C-type pliers. Detailed Implementation

[0057] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application will be presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0058] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0059] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0062] Please see Figures 1 to 4 , Figure 1This is a schematic diagram of the structure of an SPR servo self-piercing riveting gun head according to an embodiment of this application. Figure 2 This is a partial structural diagram of the rivet nose area of ​​an SPR servo self-piercing riveting gun head according to an embodiment of this application. Figure 3 This is a cross-sectional view of the actuator area of ​​an SPR servo self-piercing riveting gun head according to an embodiment of this application. Figure 4 This is a schematic diagram of the rivet nose of an SPR servo self-piercing riveting gun head according to an embodiment of this application.

[0063] like Figures 1-4 As shown, this application embodiment provides an SPR servo self-piercing riveting gun head, comprising:

[0064] The lower mold 2 and the riveting mechanism 1 are set relative to each other;

[0065] The lower mold 2 and the rivet mechanism 1 are connected by a C-type clamp 3 and are positioned opposite each other at both ends of the C-type clamp 3;

[0066] The rivet mechanism 1 includes a rivet nose 10 corresponding to the lower mold 2, and a rivet feeding mechanism 20 and a rivet tapping mechanism 30 connected to the rivet nose 10;

[0067] The tapping mechanism 30 includes a first sleeve 31, a second sleeve 32, an actuator 330, and a drive mechanism 34;

[0068] The first sleeve 31 is fixedly installed in the C-type clamp 3, and the second sleeve 32 is movably installed inside the first sleeve 31. One end of the second sleeve 32 is fixedly connected to the rivet nose 10, and the other end is connected to the drive mechanism 34.

[0069] The actuator 330 is disposed within the second sleeve 32 and includes an actuator rod 331 and a transmission assembly;

[0070] The actuator 331 is movably disposed relative to the second sleeve 32 and is connected to the drive mechanism 34 via a transmission assembly;

[0071] The actuator 331 is used to drive the rivet inside the rivet nose 10 into the part to be connected;

[0072] A magnetic component 332 is fixedly mounted on the actuator 331, and a displacement sensor 35 is mounted on the outer wall of the second sleeve 32 corresponding to the magnetic ring; the displacement sensor 35 is used to detect the movement process of the magnetic component 332.

[0073] In one embodiment, the lower die 2 is detachably mounted on the C-clamp 3 and can be adapted to the specifications of the rivet.

[0074] The C-type clamp 3 provides clamping force between the lower die 2 and the rivet during the riveting process, ensuring efficiency and stability. The C-shaped design also facilitates the insertion of the component to be connected between the lower die 2 and the rivet, providing more riveting space and allowing for greater flexibility in the riveting position.

[0075] In one embodiment, the rivet feeding mechanism 20 continuously supplies rivets to the rivet nose 10, and the driving mechanism 34 of the rivet tapping mechanism 30 drives the actuator 331 through the transmission mechanism to continuously drive the rivets in the rivet nose 10 into the parts to be connected. At this time, the displacement sensor 35 on the outer wall of the second sleeve 32 calculates the movement process of the magnetic component 332 by sensing the change in the magnetism of the magnetic component 332; thereby, the movement process of the actuator 331 can be calculated, and further, the rivet driving process can be calculated.

[0076] Since the rivet penetration depth directly depends on the rivet-driving process of the actuator 331, the rivet penetration depth calculated based on the movement of the actuator 331 has a very small error. Furthermore, the displacement sensor 35 can detect the movement of the actuator 331 in real time, enabling real-time detection of the penetration depth of each rivet. Therefore, when deviations or errors occur in the rivet-driving process, adjustments can be made immediately or the machine can be stopped for maintenance, maximizing the stability and reliability of the riveting process.

[0077] In one embodiment, the rivet nose 10 is provided with a through first channel 11, and the extending direction of the first channel 11 is aligned with the actuator 331;

[0078] A guide rail is provided on one side of the first channel 11. The first channel 11 is connected to the rivet feeding mechanism 20 through the guide rail. The rivet feeding mechanism 20 is used to provide rivets to the rivet nose 10.

[0079] The first channel 11 of the rivet nose 10 is provided with an elastic buffer 33413 corresponding to the guide pin track.

[0080] The rivet feeding mechanism 20 feeds the rivet from the guide rivet track into the first channel 11 at a relatively high initial velocity. To extend the durability of the first channel 11, an elastic buffer 33413 is provided to limit and buffer the rivet. At the same time, the elastic buffer 33413 can also limit the rivet to prevent it from deflecting or reversing significantly under high-speed impact, thus affecting the continuity and stability of the riveting process.

[0081] In one embodiment, the nail feeding mechanism 20 includes a nail feeding assembly 21, a nail feeding track 22, a nail feeding tube 23, and a drive cylinder 24;

[0082] One end of the nail feeding track 22 is connected to the nail guide track via the nail feeding assembly 21, and the other end is connected to the nail supply tube 23;

[0083] The drive cylinder 24 is connected to the rivet feeding track 22 and drives the rivets in the rivet feeding track 22 by high-pressure gas.

[0084] The rivet feeding assembly 21 is used to push the rivets in the rivet feeding track 22 into the guide rivet track.

[0085] In one embodiment, the rivet feeding track 22 is provided with a limiting groove adapted to the rivet to ensure that the rivet moves in the correct posture within the rivet feeding track 22. The rivet is fed into the rivet feeding track 22 from the rivet feeding tube 23 of the rivet feeding mechanism 20. At this time, the drive cylinder 24 provides further driving force to the rivet in the rivet feeding track 22 to prevent the rivet from getting stuck within the rivet feeding track 22.

[0086] In one embodiment, the nail feeding mechanism 20 further includes a guide limiting member 25;

[0087] One side of the guide limiter 25 is detachably and fixedly connected to the nail feeding track 22, and the other side is slidably disposed on the outer wall surface of the first sleeve 31, so that the nail feeding mechanism 20 can move synchronously with the rivet nose 10.

[0088] In one embodiment, the actuator 331 includes a connecting portion and a tapping portion;

[0089] The tapping part is aligned with the first channel 11 and can extend into the first channel 11;

[0090] The connecting part is fixedly connected to the transmission assembly and is provided with an annular groove, and the magnetic component 332 is fixedly sleeved in the annular groove.

[0091] In one embodiment, the magnetic element 332 is configured as a ring and is fitted and fixed within the annular groove to ensure the stability of the magnetic element 332.

[0092] In one embodiment, the displacement sensor 35 includes a magnetic sensing element and a signal transmission line;

[0093] The magnetic induction part is arranged in a strip shape and is attached and fixed to the outer wall of the second sleeve 32;

[0094] The length direction of the magnetic sensing part is parallel to the continuing direction of the first channel 11;

[0095] The signal transmission line is used to connect to an external control module and transmit the displacement information of the magnetic component 332.

[0096] In one embodiment, the transmission assembly includes a transmission rod 333 fixedly connected to the rivet nose 10, and a buffer member 334 and an elastic member 335 sequentially sleeved on the transmission rod 333;

[0097] One end of the elastic element 335 is fixedly connected to the outer wall of the transmission rod 333, and the other end abuts against the inner wall of the second sleeve 32 through the buffer element 334.

[0098] When the drive mechanism 34 drives the second sleeve 32 and the rivet nose 10 to pre-tighten the connection part, the elastic element 335 is stretched.

[0099] When the drive mechanism 34 drives the actuator 330 to drive the rivet in the rivet nose 10 into the part to be connected, the elastic potential energy of the elastic element 335 is released simultaneously.

[0100] In one application scenario, the rivet feeding mechanism 20 feeds the rivet into the guide rail in the correct orientation via the rivet feeding assembly 21. The rivet enters the first channel 11 with a certain initial velocity under the guidance of the guide rail. At the same time, the driving mechanism 34 of the tapping mechanism 30 can drive the second sleeve 32, together with the rivet nose 10, to move towards the part to be connected until the rivet nose 10 and the lower die 2 pre-clamp the part to be connected, thus avoiding positional deviation or displacement of the part to be connected during the tapping process.

[0101] At this time, the elastic element 335 of the transmission component in the actuator 330 accumulates elastic potential energy.

[0102] Then, the drive mechanism 34 drives the actuator 331 to drive the rivet in the first channel 11 into the part to be connected. At the same time, it releases the elastic potential energy of the elastic element 335, further enhancing the impact force of the actuator 331, thereby ensuring the efficiency and stability of the rivet driving. At this time, the displacement sensor 35 calculates the driving depth of the rivet by the movement process of the magnetic element 332 on the actuator 331, thereby evaluating the quality of the driving at this time. If the driving depth is too low, the driving force for the next driving can be appropriately increased; otherwise, it can be decreased. At the same time, when faults such as empty riveting occur, they can also be evaluated by detecting the movement process of the magnetic element 332. This greatly improves the stability and reliability of the riveting process.

[0103] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An SPR servo self-piercing riveting gun head, characterized in that, include: The lower mold and riveting mechanism are set in opposite directions; The lower die and the riveting mechanism are connected by a C-clamp and are positioned opposite each other at both ends of the C-clamp; The rivet mechanism includes a rivet nose corresponding to the lower mold, and a rivet feeding mechanism and a rivet tapping mechanism connected to the rivet nose; The tapping mechanism includes a first sleeve, a second sleeve, an actuator, and a drive mechanism; The first sleeve is fixedly disposed in the C-type clamp, and the second sleeve is movably disposed inside the first sleeve, with one end of the second sleeve fixedly connected to the rivet nose and the other end connected to the drive mechanism; The actuator is disposed within the second sleeve and includes an actuator rod and a transmission assembly; The actuator is movably disposed relative to the second sleeve and is connected to the drive mechanism via a transmission assembly; The actuator is used to drive the rivet inside the rivet nose into the component to be connected; The actuator is fixedly equipped with a magnetic component, and the outer wall of the second sleeve is equipped with a displacement sensor corresponding to the magnetic ring; the displacement sensor is used to detect the movement process of the magnetic component.

2. The SPR servo self-piercing riveting gun head as described in claim 1, characterized in that, The rivet nose is provided with a through first channel, and the extension direction of the first channel is aligned with the actuator rod; A guide rail is provided on one side of the first channel, and the first channel is connected to the rivet feeding mechanism through the guide rail. The rivet feeding mechanism is used to provide rivets to the rivet nose. The first channel of the rivet nose is provided with an elastic buffer corresponding to the guide pin track.

3. The SPR servo self-piercing riveting gun head as described in claim 2, characterized in that, The nail feeding mechanism includes a nail feeding assembly, a nail feeding track, a nail feeding tube, and a drive cylinder; One end of the nail feeding track is connected to the nail guide track via a nail feeding assembly, and the other end is connected to the nail supply tube; The drive cylinder is connected to the rivet feeding track and drives the rivets in the rivet feeding track with high-pressure gas. The rivet feeding assembly is used to push the rivets in the rivet feeding track into the guide rivet track.

4. The SPR servo self-piercing riveting gun head as described in claim 3, characterized in that, The nail supply mechanism also includes a guide and limiting component; One side of the guide limiting member is detachably and fixedly connected to the nail feeding track, and the other side is slidably disposed on the outer wall surface of the first sleeve, so that the nail feeding mechanism can move synchronously with the rivet nose.

5. The SPR servo self-piercing riveting gun head as described in claim 2, characterized in that, The actuator includes a connecting part and a tapping part; The tapping part is aligned with the first channel and can extend into the first channel; The connecting part is fixedly connected to the transmission assembly and is provided with an annular groove, and the magnetic component is fixedly sleeved in the annular groove.

6. The SPR servo self-piercing riveting gun head as described in claim 5, characterized in that, The displacement sensor includes a magnetic sensing element and a signal transmission line; The magnetic sensing part is arranged in a strip shape and is attached and fixed to the outer wall of the second sleeve; The length direction of the magnetic sensing part is parallel to the extension direction of the first channel; The signal transmission line is used to connect to an external control module and transmit the displacement information of the magnetic component.

7. An SPR servo self-piercing riveting gun head as described in any one of claims 1 to 6, characterized in that, The transmission assembly includes a transmission rod fixedly connected to the rivet nose, and a buffer member and an elastic member sequentially sleeved on the transmission rod; One end of the elastic element is fixedly connected to the outer wall of the transmission rod, and the other end abuts against the inner wall of the second sleeve through the buffer element; When the drive mechanism drives the second sleeve and the rivet nose to pre-tighten the connection part, the elastic element is stretched; When the drive mechanism drives the actuator to drive the rivet in the rivet nose into the part to be connected, the elastic potential energy of the elastic element is released simultaneously.

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