CN-224209071-U - SPR servo self-punching riveting gun head

CN224209071UCN 224209071 UCN224209071 UCN 224209071UCN-224209071-U

Abstract

The embodiment of the application provides an SPR servo self-punching riveting gun head, which comprises a lower die and a rivet mechanism, wherein the rivet mechanism comprises a first sleeve, a second sleeve, an actuating mechanism and a driving mechanism, the second sleeve is movably arranged in the first sleeve, the actuating mechanism is arranged in the second sleeve and comprises an actuating rod and a transmission assembly, the actuating rod is movably arranged relative to the second sleeve and is connected with the driving mechanism through the transmission assembly, a magnetic part is fixedly arranged on the actuating rod, a displacement sensor is arranged on the outer wall surface of the second sleeve corresponding to a magnetic ring, and the displacement sensor is used for detecting the movement process of the magnetic part. Through directly setting up the magnetic part on actuating lever to through outside displacement sensor at the second sleeve pipe, detect the motion process of magnetic part, thereby more accurate measurement actuating lever is to the attack degree of depth of rivet, thereby accurate obtain the rivet and attack degree of depth, ensure the high efficiency and the reliability of rivet attack process.

Inventors

Zhang Caiyang
CHENG TINGMAO
GU JIAN
ZHU XIAOCHENG
HU XIAOWEI
JIN YU
XIA XIUPING

Assignees

上海固极智能科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250516

Claims (7)

1. An SPR servo self-piercing riveting gun head, comprising: A lower die and a rivet mechanism which are oppositely arranged; the lower die is connected with the rivet mechanism through a C-shaped clamp, and is arranged at two ends of the C-shaped clamp relatively; the rivet mechanism comprises a rivet nose, a nail supply mechanism and a nail tapping mechanism, wherein the rivet nose is arranged corresponding to the lower die, and the nail supply mechanism and the nail tapping mechanism are connected with the rivet nose; The tapping mechanism comprises a first sleeve, a second sleeve, an executing mechanism and a driving mechanism; The first sleeve is fixedly arranged in the C-shaped clamp, the second sleeve is movably arranged in the first sleeve, and one end of the second sleeve is fixedly connected with the riveting nose; the actuating mechanism is arranged in the second sleeve and comprises an actuating rod and a transmission assembly; The actuating rod is movably arranged relative to the second sleeve and is connected with the driving mechanism through a transmission assembly; the actuating rod is used for tapping the rivet in the rivet nose into the part to be connected; The actuating rod is fixedly provided with a magnetic part, the outer wall surface of the second sleeve is provided with a displacement sensor corresponding to the magnetic ring, and the displacement sensor is used for detecting the movement process of the magnetic part.
2. The SPR servo self-piercing riveting gun as recited in claim 1, wherein, The rivet nose is provided with a first through channel, and the extending direction of the first channel is aligned with the actuating rod; A nail guiding rail is arranged on one side of the first channel, the first channel is connected with the nail feeding mechanism through the nail guiding rail, and the nail feeding mechanism is used for providing rivets for the rivet noses; the first channel of the rivet nose is provided with an elastic buffer piece corresponding to the nail guiding track.
3. The SPR servo self-piercing riveting gun head as recited in claim 2, wherein said nail feeding mechanism comprises a nail feeding assembly, a nail feeding track, a nail feeding tube and a driving cylinder; One end of the nail conveying rail is connected with the nail guiding rail through a nail feeding assembly, and the other end of the nail conveying rail is connected with the nail feeding pipe; The driving cylinder is connected to the nail conveying track and drives rivets in the nail conveying track through high-pressure gas; the nail feeding assembly is used for pushing rivets in the nail conveying track into the nail guiding track.
4. A SPR servo self-piercing riveting gun as recited in claim 3, wherein said staple feed mechanism further comprises a guide stop; One side of the guide limiting piece is detachably and fixedly connected with the nail conveying track, and the other side of the guide limiting piece is slidably arranged on the outer wall surface of the first sleeve, so that the nail feeding mechanism can synchronously move with the rivet nose.
5. The SPR servo self-piercing riveting gun head as recited in claim 2, wherein said actuator rod comprises a connecting portion and a tapping portion connected to each other; the tapping portion is aligned with the first channel and is extendable into the first channel; The connecting part is fixedly connected with the transmission assembly and is provided with an annular groove, and the magnetic piece is fixedly sleeved in the annular groove.
6. The SPR servo self-piercing riveting gun as recited in claim 5, wherein said displacement sensor comprises a magnetic sensing portion and a signal transmission line; The magnetic induction part is arranged in a strip shape and is adhered and fixed on the outer wall of the second sleeve; the length direction of the magnetic induction part is parallel to the continuous direction of the first channel; The signal transmission line is used for being connected with an external control module and transmitting displacement information of the magnetic piece.
7. The SPR servo self-piercing riveting gun head as claimed in any one of claims 1-6, wherein the transmission assembly comprises a transmission rod fixedly connected with the riveting nose, and a buffer piece and an elastic piece which are sequentially sleeved on the transmission rod; One end of the elastic piece is fixedly connected with the outer wall of the transmission rod, and the other end of the elastic piece is abutted with the inner wall of the second sleeve through the buffer piece; When the driving mechanism drives the second sleeve and the rivet nose to pre-tighten the part to be connected, the elastic piece is stretched; when the actuating mechanism is driven by the driving mechanism to attack the rivet in the rivet nose into the part to be connected, the elastic potential energy of the elastic piece is synchronously released.

Description

SPR servo self-punching riveting gun head Technical Field The application relates to the technical field of riveting devices, in particular to an SPR servo self-piercing riveting gun head. Background SPR (Self-PIERCING RIVETING) Self-piercing riveting technology is a key joining process in the automotive industry, the core function of which is to firmly join two or more metal parts together. This process achieves a strong mechanical connection by applying sufficient pressure to the rivet to penetrate the components to be joined and form a mechanical interlock. A major factor in ensuring the quality and stability of the rivet is the precise positioning of the rivet. At present, in the process of feeding rivets into parts to be connected, the self-piercing riveting equipment needs to clamp and position the rivets once by means of a specially designed clamp, and the feeding depth of the rivets is accurately controlled so as to ensure the riveting quality. However, since the rivet undergoes dynamic changes during penetration and locking, and at the same time, deviations in structural strength uniformity of the components to be connected at different positions, it is difficult to maintain absolute accuracy of the rivet position throughout the riveting process. Thus, the prior art often requires measuring the depth of penetration of the rivet to monitor the riveting process and evaluate the quality of the rivet. However, in the existing servo self-piercing riveting gun head, the tapping depth of the rivet can be calculated directly according to the driving distance of the servo motor, and the method is simple, but because the method is indirect measurement, the detection precision is poor, and the reliability requirement is difficult to meet in fine production. The method of directly measuring the depth of the rivet can achieve extremely high accuracy, but requires additional detection procedures, the detection cost is high under the condition of a large number of rivets, and the detection result of the rivet has a long time difference from the time of the attack, so that the method is difficult to be applied to an application scene of high-speed riveting. Disclosure of utility model The application aims to solve the problems that the rivet attack depth detection precision is poor and the high-efficiency fine riveting application scene is difficult to meet in the prior art. Therefore, the application provides the SPR servo self-piercing riveting gun head, 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 attack depth of the execution rod to the rivet is measured more accurately, the attack depth of the rivet is obtained accurately, and the high efficiency and the reliability of the attack process of the rivet are ensured. The embodiment of the application provides an SPR servo self-piercing riveting gun head, which comprises: A lower die and a rivet mechanism which are oppositely arranged; the lower die is connected with the rivet mechanism through a C-shaped clamp, and is arranged at two ends of the C-shaped clamp relatively; the rivet mechanism comprises a rivet nose, a nail supply mechanism and a nail tapping mechanism, wherein the rivet nose is arranged corresponding to the lower die, and the nail supply mechanism and the nail tapping mechanism are connected with the rivet nose; The tapping mechanism comprises a first sleeve, a second sleeve, an executing mechanism and a driving mechanism; The first sleeve is fixedly arranged in the C-shaped clamp, the second sleeve is movably arranged in the first sleeve, and one end of the second sleeve is fixedly connected with the riveting nose; the actuating mechanism is arranged in the second sleeve and comprises an actuating rod and a transmission assembly; The actuating rod is movably arranged relative to the second sleeve and is connected with the driving mechanism through a transmission assembly; the actuating rod is used for tapping the rivet in the rivet nose into the part to be connected; The actuating rod is fixedly provided with a magnetic part, the outer wall surface of the second sleeve is provided with a displacement sensor corresponding to the magnetic ring, and the displacement sensor is used for detecting the movement process of the magnetic part. In some embodiments, the rivet nose is provided with a first channel therethrough, and the first channel extends in a direction aligned with the actuating rod; A nail guiding rail is arranged on one side of the first channel, the first channel is connected with the nail feeding mechanism through the nail guiding rail, and the nail feeding mechanism is used for providing rivets for the rivet noses; the first channel of the rivet nose is provided with an elastic buffer piece corresponding to the nail guiding track. In some embodiments, the staple feeding mechanism comprises a