An adaptive constant force rotary riveting device for fiber optic connectors

Abstract

This invention discloses an adaptive constant-force rotary riveting device for fiber optic connectors, comprising a worktable, a mounting base, a multi-axis force sensor, a drive unit with an encoder, circumferentially distributed extrusion units, and a controller. The multi-axis force sensor is positioned along the central axis of the mounting base and inserted into the connector's inner hole to acquire the radial extrusion force and its directional component. The controller adjusts the pneumatic push rod thrust based on the deviation of this force from a preset threshold, keeping the extrusion force within a preset range. Simultaneously, based on the phase correspondence between the directional component and the rotational position, the eccentric orientation is determined, and the corresponding extrusion unit is differentially adjusted to generate an asymmetric radial force. This invention achieves adaptive constant-force control and eccentric differential compensation of radial pressure, effectively overcoming the defects of traditional blind pressure methods and significantly improving the coaxiality of the fiber optic connector's core and processing yield.

Description

Technical Field

[0001] This invention relates to the field of automated riveting equipment for optical fiber processing, specifically to an adaptive constant force rotary riveting device for optical fiber connectors. Background Technology

[0002] In the manufacturing process of fiber optic connectors, rotary riveting equipment is typically used. This equipment applies radial pressure to the outer shell using compression rollers distributed around the perimeter, causing the shell to deform and thus securing the internal components. The quality of the riveting directly determines the tensile strength and optical signal transmission performance of the fiber optic connector.

[0003] However, existing fiber optic connector rotary riveting equipment suffers from the following shortcomings in practical applications: Existing equipment typically only allows setting a fixed clamping force by adjusting the output of an external cylinder or motor. Due to frictional losses during mechanical transmission, assembly gaps, and the hardness tolerance of the fiber optic connector shell material across different batches, there is a significant deviation between the externally set output force and the actual riveting force borne by the connector center. This easily leads to insufficient actual riveting force resulting in product loosening, or excessive actual riveting force damaging internal sensitive components. When the fiber optic connector to be riveted is placed into the equipment, it usually has a slight initial eccentricity or processing error. During rotary crimping, existing equipment only provides a mechanical, uniform radial thrust from the clamping rollers in all directions. This lack of dynamic adaptability prevents targeted intervention based on the real-time eccentricity of the product, resulting in the finished product's core coaxiality often failing to meet high-precision standards, causing significant optical insertion loss. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an adaptive constant force rotary riveting device for fiber optic connectors, which solves the problems of existing riveting forces not being able to provide real-time and accurate feedback, lacking dynamic compensation capabilities for initial eccentricity errors of products, and resulting in poor product coaxiality and low performance consistency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adaptive constant force rotary riveting device for fiber optic connectors, comprising: Workbench; The mounting base is rotatably mounted on the worktable. A driving component is connected to the mounting base to drive the mounting base to rotate. The driving component is equipped with an encoder for detecting the rotational position of the mounting base. A multi-axis force sensor is axially disposed at the center of the mounting base and used to be inserted into the inner hole of the fiber optic connector to obtain the radial extrusion force at the inner hole of the fiber optic connector and the directional component of the radial extrusion force. At least three extrusion units are distributed circumferentially around the mounting base. Each extrusion unit includes a pneumatic push rod and an extrusion head driven by the pneumatic push rod, the extrusion head being radially directed towards the axis of the mounting base. The controller is communicatively connected to the multi-axis force sensor, the encoder, and each of the extrusion units. The controller is configured to: synchronously adjust each of the pneumatic push rods according to the deviation between the radial extrusion resultant force and a preset threshold, so that the radial extrusion resultant force is kept within a preset range; and establish a correspondence between the directional component and the rotation position of the mounting base to determine the force eccentricity, and differentially adjust the corresponding extrusion unit so that the radial force output by each extrusion head is asymmetrically distributed.

[0006] Through the above technical solution: the present invention sets a multi-axis force sensor at the center of the mounting base and inserts it into the inner hole of the fiber optic connector, which can directly obtain the radial extrusion force and its directional component at the inner hole, thereby truly reflecting the actual stress state of the workpiece; at the same time, combined with the rotation position detection information of the drive component, the directional component is established with the rotation position, so that the controller can identify the specific location of uneven radial force and perform differential adjustment on the corresponding extrusion unit, so that each extrusion head forms an asymmetric radial force distribution that dynamically changes with the rotation process, thereby compensating for eccentric force in real time; on this basis, through closed-loop adjustment of the thrust of each extrusion unit, the radial extrusion force is stably maintained within the preset range, avoiding overpressure or underpressure problems, thereby improving riveting accuracy, product coaxiality and overall consistency, while enhancing the equipment's adaptability to complex working conditions and process stability.

[0007] Preferably, the multi-axial force sensor is provided with a bearing sleeve on its outer side for contacting the inner hole of the fiber optic connector. The bearing sleeve is used to withstand radial extrusion force exceeding a preset range. A gap is provided between the multi-axial force sensor and the bearing sleeve so that the multi-axial force sensor can undergo restricted deformation within the gap range between itself and the bearing sleeve under the action of the radial extrusion force.

[0008] The above technical solution involves installing a bearing sleeve on the outside of the multi-axial force sensor with a gap between them. This allows the radial compressive force to be transmitted to the multi-axial force sensor through the bearing sleeve within the normal operating range, ensuring accurate measurement within the sensor's elastic range. When the radial compressive force exceeds a preset range, the bearing sleeve preferentially bears and shares the overload, thereby limiting the deformation of the multi-axial force sensor and preventing overload damage. Therefore, while ensuring measurement accuracy, the structural reliability and service life of the sensor are improved, and the stability and safety of the equipment under abnormal operating conditions are enhanced.

[0009] Preferably, the extrusion unit is in three groups and is distributed at equal 120-degree intervals along the circumference of the mounting base.

[0010] The above technical solution involves setting the extrusion units into three groups and distributing them at equal 120-degree intervals along the circumference of the mounting base. This allows each extrusion unit to form a basically symmetrical radial force structure in the initial state, which is beneficial for establishing a balanced force foundation in the early stages of riveting. Based on this structure, the differential adjustment of the controller can be further combined to correct local force deviations while maintaining overall stability, thus taking into account both structural stability and dynamic adjustment capability.

[0011] Preferably, each of the extrusion units further includes a fixing block fixed to the worktable and a linear guide rail disposed on the fixing block and extending toward the center of the mounting base; the extrusion head is slidably fitted on the linear guide rail and is drively connected to the output end of the pneumatic push rod.

[0012] The above technical solution involves setting a fixed block and a linear guide rail in each extrusion unit, causing the extrusion head to move linearly along the guide rail direction, thereby constraining the movement trajectory of the extrusion head and preventing swaying or tilting during the advancement process. At the same time, the pneumatic push rod drives the extrusion head to move radially through a transmission connection, making the direction of the force applied to the fiber optic connector shell more stable, which helps to improve riveting accuracy and repeatability.

[0013] Preferably, the extrusion head includes a connecting arm, a slider, and an extrusion wheel; one end of the connecting arm is connected to the output end of the pneumatic push rod, and the extrusion wheel is rotatably disposed at the other end of the connecting arm; the slider is fixedly disposed at the bottom of the connecting arm, and the side of the slider away from the connecting arm is provided with a groove adapted to the linear guide rail.

[0014] The above technical solution involves constructing the extrusion head as a structure including a connecting arm, a slider, and an extrusion wheel. This allows the extrusion wheel to rotate relative to the fiber optic connector housing, thereby transforming traditional sliding friction into rolling contact. Simultaneously, the slider and linear guide rail work together to ensure overall motion stability, making the extrusion process smoother, reducing frictional resistance and localized wear, and improving riveting quality and equipment operation stability.

[0015] Preferably, the end of the connecting arm away from the pneumatic push rod has a U-shaped clamping opening; the extrusion head also includes a rotating shaft, which passes between the upper and lower side walls of the clamping opening; the extrusion wheel is rotatably mounted in the clamping opening through the rotating shaft, and the outer edge of the extrusion wheel protrudes out of the clamping opening.

[0016] The above technical solution involves setting a U-shaped clamping port at the end of the connecting arm and using a rotating shaft to rotate and install the extrusion wheel into the clamping port, thus giving the extrusion wheel a stable rotational support structure. At the same time, the outer edge of the extrusion wheel protrudes from the clamping port, ensuring that it can effectively contact the fiber optic connector shell and perform rolling, thereby improving the stress stability and rotational reliability of the extrusion wheel while ensuring structural compactness.

[0017] Preferably, the outer periphery of the extrusion wheel is provided with a guide slope, which is used to guide the fiber optic connector housing into the rolling position of the extrusion wheel.

[0018] The above technical solution involves setting a guide slope on the outer periphery of the extrusion roller, allowing the fiber optic connector housing to gradually transition to the rolling position under the guidance of the slope when entering the extrusion area, thus avoiding direct impact on the extrusion roller. This structure helps reduce the impact load during initial contact, making the extrusion process smoother and improving the accuracy of the workpiece entry position.

[0019] Preferably, the top of the mounting base has a positioning groove that matches the bottom shape of the fiber optic connector; the bottom surface of the positioning groove has a through hole for the multi-axis force sensor to pass through, and at least two positioning posts are also protruding from the bottom surface of the positioning groove; the positioning groove and the positioning posts together limit the position of the fiber optic connector.

[0020] The above technical solution involves setting a positioning groove on the top of the mounting base that matches the shape of the bottom of the fiber optic connector, and cooperating with at least two positioning posts to form a multi-point limiting structure for the fiber optic connector. At the same time, a through hole is set on the bottom surface of the groove for the multi-axis force sensor to pass through, so that the multi-axis force sensor can accurately align with the inner hole position. This structure helps to improve the stability and positioning accuracy of the workpiece clamping, thereby ensuring the consistency of force during the subsequent riveting process.

[0021] Preferably, the driving component includes a servo motor; a bearing seat is fixedly provided on the worktable, and the mounting base is rotatably supported on the bearing seat; the servo motor is vertically mounted on the bottom of the worktable, and the output shaft of the servo motor passes through the bearing seat and is coaxially connected to the mounting base.

[0022] The above technical solution employs a servo motor as the driving component, which, in conjunction with a bearing housing, provides rotational support for the mounting base, enabling the mounting base to rotate smoothly under stable support. Simultaneously, the servo motor's output shaft is coaxially connected to the mounting base, ensuring consistency between the rotation center and the centers of the multi-axis force sensor and the workpiece. This improves rotational accuracy and provides a stable foundation for subsequent force detection and control.

[0023] This invention provides an adaptive constant force rotary riveting device for fiber optic connectors. It has the following advantages: 1. This invention significantly improves the coaxiality of the inner core of the fiber optic connector after molding by introducing a closed-loop control mechanism of force sensing, phase calculation, and differential compensation. A multi-axis force sensor arranged at the center acquires the directional component of the radial extrusion force at the inner hole in real time, and combined with the rotational position detected by the encoder, accurately determines the specific location of uneven radial force. Based on this, the controller outputs differential adjustment commands to the pneumatic push rods at the corresponding locations, causing each extrusion head to generate an asymmetrical radial force. This dynamic differential compensation effectively eliminates the negative impacts of initial eccentricity and uneven shell material of the fiber optic connector, significantly improving the optical transmission performance of the fiber optic connector.

[0024] 2. This invention significantly improves product yield and processing consistency through adaptive constant force rolling. During the riveting rotation process, the controller compares the radial extrusion force, fed back in real time by multi-axis force sensors, with a preset threshold at high frequency, and synchronously adjusts the base thrust output of each pneumatic push rod. This ensures that the overall radial force applied to the fiber optic connector housing is always dynamically maintained within the optimal process preset range, effectively avoiding damage to internal sensitive components due to excessive pressure or riveting loosening due to insufficient pressure, thus guaranteeing high quality and high stability in mass production.

[0025] 3. This invention boasts advantages such as high measurement accuracy and highly reliable purely mechanical overload protection. The drive transmission system is directly driven by a bottom servo motor to the mounting base, and the multi-axis force sensor is suspended along the axial center, completely eliminating parasitic interference caused by external transmission eccentricity to the sensor, ensuring high purity and accuracy of multi-axis force data. Furthermore, a load-bearing sleeve is cleverly fitted around the outside of the multi-axis force sensor. Under normal operating conditions, the multi-axis force sensor undergoes limited deformation within the gap between itself and the load-bearing sleeve to accurately sense the force. In the event of overload and loss of control, the load-bearing sleeve directly and rigidly contacts the non-sensitive rigid structure of the multi-axis force sensor by eliminating the physical gap, bearing the entire destructive load. This provides extremely reliable overload protection for the high-precision, fragile multi-axis force sensor, significantly extending the equipment's service life and reducing maintenance costs. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an adaptive constant force rotary riveting device for fiber optic connectors according to the present invention. Figure 2 For the present invention Figure 1 A cross-sectional view along the AA direction; Figure 3 This is a partial three-dimensional schematic diagram of the extrusion unit and the mounting base of the present invention. Figure 4 For the present invention Figure 2 A magnified view of a portion of point A in the middle; Figure 5 For the present invention Figure 3 A magnified view of a portion of point B in the middle; Explanation of reference numerals in the attached drawings: 1. Worktable; 11. Bearing seat; 2. Mounting seat; 21. Positioning groove; 22. Through hole; 23. Positioning post; 3. Drive component; 31. Encoder; 4. Multi-axis force sensor; 41. Bearing sleeve; 5. Extrusion unit; 51. Pneumatic push rod; 52. Extrusion head; 521. Connecting arm; 522. Slider; 523. Extrusion wheel; 5231. Guide slope; 524. Clamping port; 525. Rotating shaft; 53. Linear guide rail; 55. Fixing block; 6. Controller. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments. It should be noted that the following embodiments are only used to explain the technical logic and engineering implementation path of the present invention, and are not intended to limit the scope of protection of the present invention. In the description of the present invention, the terms "center", "longitudinal", "lateral", "radial", "circumferential", "vertical", "horizontal", "inner", "outer", etc., indicate spatial orientation or positional relationship based on conventional mechanical references and are only for the purpose of facilitating a coherent description of the present invention and simplifying the explanatory language, and do not explicitly or implicitly suggest that the device or element referred to must have a specific absolute orientation.

[0028] like Figures 1 to 5 As shown in the figure, this embodiment discloses an adaptive constant force rotary riveting device for fiber optic connectors, which is mainly used to radially rotate and compress the outer shell of the fiber optic connector to firmly rivet the internal components of the fiber optic connector.

[0029] The adaptive constant force rotary riveting device for the fiber optic connector includes: a worktable 1, a mounting base 2 rotatably mounted on the worktable 1, a drive component 3 that provides rotational power to the mounting base 2, a multi-axis force sensor 4 axially arranged at the center of the mounting base 2, at least three pressing units 5 distributed around the mounting base 2, and a controller 6 that coordinates the signals and actions of the entire machine.

[0030] The core of this equipment lies in its departure from the traditional blind pressure mode of "externally set fixed thrust." Instead, it directly senses the actual force and the directional component of the radial extrusion force at the inner hole of the fiber optic connector through a multi-axial force sensor 4 arranged in the central axis. Combined with the rotational phase of the mounting base 2 detected by the encoder 31 on the drive unit 3, the controller 6 performs asymmetrical differential thrust adjustment on the circumferentially distributed extrusion units 5, thereby establishing a closed-loop physical system of "force sensing - phase calculation - differential compensation." The worktable 1 serves as the load-bearing reference for the entire machine, and a bearing seat 11 is fixed in the central area of ​​the upper surface of the worktable 1. The lower half of the mounting base 2 is rotatably supported within the bearing seat 11, thus restricting the radial and axial translational degrees of freedom of the mounting base 2, retaining only the degree of freedom of rotation around the central axis.

[0031] In this embodiment, the drive component 3 is preferably a servo motor with position feedback. The drive component 3 is vertically mounted on the bottom of the worktable 1, and its output shaft passes upward through the central hole of the bearing housing 11, coaxially connected to the bottom end of the mounting base 2. Specifically, the output shaft axis of the drive component 3 and the rotation axis of the mounting base 2 are on the same straight line, and are fixedly connected by a rigid coupling or flange. Through this mating structure where the bearing housing 11 bears the load and the drive component 3 directly drives the drive component, the rotational torque of the drive component 3 can be transmitted to the mounting base 2 without hysteresis or backlash, while ensuring strict alignment of the output shaft of the drive component 3 and the rotation axis of the mounting base 2 in physical space. Simultaneously, since the radial compressive force is completely unloaded by the bearing housing 11, the output shaft of the drive component 3 is effectively prevented from wobbling due to bending stress, completely eliminating parasitic interference caused by transmission eccentricity to the internal multi-axis force sensor 4. In addition, the drive component 3 is equipped with an encoder 31 for real-time detection and output of the high-frequency absolute rotational position (physical phase) of the mounting base 2.

[0032] On the top of the mounting base 2, a positioning groove 21 is provided, which is adapted to the bottom shape of the fiber optic connector. At least two positioning posts 23 are also vertically protruding upwards on the horizontal bottom surface of the positioning groove 21. When the fiber optic connector to be processed is inserted, the outer contour of the bottom of the fiber optic connector is limited by the positioning groove 21, and the process hole on the bottom of the fiber optic connector engages with the positioning posts 23. The combined action of the positioning groove 21 and the positioning posts 23 physically locks the circumferential relative rotation between the fiber optic connector and the mounting base 2, ensuring that the fiber optic connector maintains absolute synchronous rotation with the mounting base 2 when riveted under force.

[0033] A through hole 22 is provided at the center of the bottom surface of the positioning groove 21, extending axially through the mounting base 2. The multi-axis force sensor 4 passes through the through hole 22 from bottom to top and is suspended at the center of the positioning groove 21. When the fiber optic connector is installed, the multi-axis force sensor 4 is precisely inserted into the inner hole of the fiber optic connector to be riveted.

[0034] To achieve accurate sensing of complex forces in space, the multi-axis force sensor 4 employs a force-sensitive element based on an orthogonal strain gauge architecture. It can not only sense the scalar magnitude of the radial force, but also calculate and output the directional components of the radial compressive force in real time on the mutually perpendicular X and Y axes, thus providing a high-precision data source for the subsequent controller 6 to perform vector eccentricity compensation.

[0035] To address the engineering problem of the multi-axial force sensor 4 being easily damaged by abnormal compressive force, a load-bearing sleeve 41 is fitted around the outside of the multi-axial force sensor 4. The outer wall of the load-bearing sleeve 41 is in direct physical contact with the inner hole of the fiber optic connector, and a physical gap is reserved between the sensitive body of the multi-axial force sensor 4 and the inner wall of the load-bearing sleeve 41. Within a preset normal riveting pressure range, the inner hole of the fiber optic connector is compressed, causing the load-bearing sleeve 41 to undergo a slight displacement, which is less than the width of the physical gap. At this time, the load-bearing sleeve 41 transmits the received compressive force and triggers the multi-axial force sensor 4, causing the multi-axial force sensor 4 to undergo restricted deformation within its rated elastic range to obtain a mechanical signal. When the extrusion unit 5 malfunctions, causing the radial compressive force to instantaneously exceed the preset range, the inner wall of the load-bearing sleeve 41 directly and rigidly abuts against the non-sensitive rigid part of the multi-axial force sensor 4 itself. At this time, the destructive load is directly unloaded by the high-strength load-bearing sleeve 41, and the deformation of the multi-axial force sensor 4 is forcibly locked and no longer increases, achieving purely mechanical overload protection.

[0036] On the workbench 1, three sets of extrusion units 5 are distributed circumferentially around the mounting base 2. The three sets of extrusion units 5 are evenly distributed at 120-degree intervals, forming an execution array that can achieve radial force self-balancing in mechanical terms.

[0037] Each extrusion unit 5 further includes a fixing block 55 fixed on the worktable 1, and a linear guide rail 53 disposed on the fixing block 55 and extending precisely toward the center of the mounting base 2. The power source of each extrusion unit 5 is a pneumatic push rod 51 (in this embodiment, it is specifically a cylinder with an electric proportional valve, which adjusts the air pressure by receiving control electrical signals to achieve stepless adjustment of the output thrust); the extrusion head 52 is slidably fitted on the linear guide rail 53 and is drively connected to the output end of the pneumatic push rod 51. To achieve smooth roll forming, the extrusion head 52 includes a connecting arm 521, a slider 522, and an extrusion wheel 523; one end of the connecting arm 521 is connected to the output end of the pneumatic push rod 51, and the extrusion wheel 523 is rotatably disposed on the other end of the connecting arm 521; the slider 522 is fixedly disposed on the bottom of the connecting arm 521, and the side of the slider 522 away from the connecting arm 521 is provided with a groove adapted to the linear guide rail 53.

[0038] Furthermore, the connecting arm 521 has a U-shaped clamping port 524 at one end away from the pneumatic push rod 51; the extrusion head 52 also includes a rotating shaft 525, which passes between the upper and lower side walls of the clamping port 524; the extrusion wheel 523 is rotatably mounted in the clamping port 524 via the rotating shaft 525, and the outer edge of the extrusion wheel 523 protrudes from the clamping port 524 so as to make initial contact with the fiber optic connector housing.

[0039] Furthermore, the outer periphery of the extrusion roller 523 is machined with an inclined guide surface 5231. The function of the guide surface 5231 is to guide the outer shell of the fiber optic connector to smoothly transition into the rolling position of the extrusion roller 523, eliminating the rigid impact at the moment of contact.

[0040] In this embodiment, the control logic is managed by a controller 6 (such as a PLC) through a multi-variable closed-loop control. The controller 6 establishes high-speed communication connections with the multi-axis force sensor 4, the encoder 31, and the electro-proportional valves that control each pneumatic actuator 51.

[0041] To more clearly demonstrate the closed-loop control logic of controller 6, the following details the working principle of the device in a single riveting operation: The operator or automated robot places the fiber optic connector to be riveted into the positioning groove 21 on the top of the mounting base 2, so that the positioning pin 23 is inserted into the process hole. At the same time, the multi-axis force sensor 4 and the external load-bearing sleeve 41 are precisely inserted into the inner hole of the fiber optic connector. The controller 6 issues a start command, and the drive unit 3 drives the mounting base 2 and the fiber optic connector to start rotating synchronously. At the same time, the controller 6 controls the three sets of extrusion units 5, driving the pneumatic push rod 51 to extend, so that the three extrusion rollers 523, guided by the guide inclined surface 5231, smoothly contact the outer shell of the fiber optic connector and apply an initial radial preload. During the continuous rotation and rolling process, the multi-axis force sensor 4 collects the force data of the inner hole of the fiber optic connector in real time at a millisecond frequency, and transmits the mutually orthogonal mechanical components (X-axis component) to the inner hole of the fiber optic connector. Y-axis component The data is transmitted to controller 6. Controller 6 calculates the absolute value of the radial compressive force in real time. Controller 6 will control the actual resultant force. The pressure is compared with the preset standard force threshold at high frequency. The PID algorithm is used to synchronously and proportionally fine-tune the basic thrust of the three sets of pneumatic push rods 51 to resist mechanical tolerance and ensure that the overall extrusion pressure is always constant within the preset safe and effective range, so as to achieve constant force pressing of the foundation.

[0042] Simultaneously, the controller 6 maps the radial direction component obtained by the multi-axis force sensor 4 to the rotational position (physical phase) of the mounting base 2 detected in real time by the encoder 31, thereby accurately determining the specific location of the current uneven radial force. After determining the location, the controller 6 outputs a differential adjustment command to the pneumatic push rod of the corresponding extrusion unit 5. For example, it instantly fine-tunes and reduces the cylinder thrust of the larger phase and dynamically compensates for the opposing thrust, so that the radial force generated by each extrusion head 52 is asymmetrically distributed. This closed-loop adjustment of "force perception - eccentricity calculation - differential compensation" is executed continuously at high frequency throughout the entire riveting cycle, forcibly correcting eccentric deformation and significantly improving the coaxiality of the inner core after forming.

[0043] Once the controller 6 detects that the number of rotations or the crimping time has reached the preset parameters, it determines that the riveting has met the standard. The controller 6 instructs each pneumatic push rod 51 to depressurize and retract, driving each extrusion head 52 to retract radially. The drive component 3 decelerates to zero and stops, the operation process ends, and the riveted high-precision fiber optic connector can then be removed.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way; any equivalent changes and modifications made by those skilled in the art based on the above description shall fall within the protection scope of the present invention.

Claims

1. An adaptive constant force rotary riveting device for fiber optic connectors, characterized in that, include: Workbench (1); Mounting base (2) is rotatably mounted on the workbench (1); The driving component (3) is connected to the mounting base (2) to drive the mounting base (2) to rotate. The driving component (3) is provided with an encoder (31) for detecting the rotation position of the mounting base (2). A multi-axis force sensor (4) is axially disposed at the center of the mounting base (2) and used to be inserted into the inner hole of the fiber optic connector to obtain the radial extrusion force at the inner hole of the fiber optic connector and the directional component of the radial extrusion force. At least three extrusion units (5) are circumferentially distributed around the mounting base (2). Each extrusion unit (5) includes a pneumatic push rod (51) and an extrusion head (52) driven by the pneumatic push rod (51). The extrusion head (52) is radially directed toward the axis of the mounting base (2). The controller (6) is communicatively connected to the multi-axis force sensor (4), the encoder (31) and each of the extrusion units (5); The controller (6) is configured to: synchronously adjust each of the pneumatic push rods (51) according to the deviation between the radial extrusion force and the preset threshold, so that the radial extrusion force is kept within the preset range; and establish a correspondence between the directional component and the rotation position of the mounting base (2) to determine the force eccentricity, and differentially adjust the corresponding extrusion unit (5) so that the radial force output by each extrusion head (52) is asymmetrically distributed.

2. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 1, characterized in that: The multi-axial force sensor (4) is provided with a bearing sleeve (41) on its outer side for contacting the inner hole of the fiber optic connector. The bearing sleeve (41) is used to withstand radial extrusion force exceeding a preset range. A gap is provided between the multi-axial force sensor (4) and the bearing sleeve (41) so that the multi-axial force sensor (4) can undergo restricted deformation within the gap range between itself and the bearing sleeve (41) under the action of the radial extrusion force.

3. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 1, characterized in that: The extrusion unit (5) consists of three groups, which are distributed at equal 120-degree intervals along the circumference of the mounting base (2).

4. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 1 or 3, characterized in that: Each of the extrusion units (5) further includes a fixing block (55) fixed on the worktable (1) and a linear guide rail (53) disposed on the fixing block (55) and extending toward the center of the mounting base (2); the extrusion head (52) is slidably fitted on the linear guide rail (53) and is connected to the output end of the pneumatic push rod (51) in a transmission connection.

5. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 4, characterized in that: The extrusion head (52) includes a connecting arm (521), a slider (522), and an extrusion wheel (523); one end of the connecting arm (521) is connected to the output end of the pneumatic push rod (51), and the extrusion wheel (523) is rotatably disposed at the other end of the connecting arm (521); the slider (522) is fixedly disposed at the bottom of the connecting arm (521), and the side of the slider (522) away from the connecting arm (521) is provided with a groove that is compatible with the linear guide rail (53).

6. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 5, characterized in that: The connecting arm (521) has a U-shaped clamping port (524) at one end away from the pneumatic push rod (51); the extrusion head (52) also includes a rotating shaft (525), which passes between the upper and lower side walls of the clamping port (524); the extrusion wheel (523) is rotatably mounted in the clamping port (524) through the rotating shaft (525), and the outer edge of the extrusion wheel (523) protrudes from the clamping port (524).

7. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 5 or 6, characterized in that: The outer periphery of the extrusion roller (523) is provided with a guide slope (5231), which is used to guide the fiber optic connector housing into the rolling position of the extrusion roller (523).

8. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 1, characterized in that: The top of the mounting base (2) is provided with a positioning groove (21) that matches the bottom shape of the fiber optic connector; the center of the bottom surface of the positioning groove (21) is provided with a through hole (22) for the multi-axis force sensor (4) to pass through, and at least two positioning posts (23) are also provided on the bottom surface of the positioning groove (21); the positioning groove (21) and the positioning posts (23) together limit the fiber optic connector.

9. The adaptive constant force rotary riveting device for fiber optic connectors according to claim 1, characterized in that: The driving component (3) includes a servo motor; a bearing seat (11) is fixed on the worktable (1), and the mounting seat (2) is rotatably supported on the bearing seat (11); the servo motor is vertically installed at the bottom of the worktable (1), and the output shaft of the servo motor passes through the bearing seat (11) and is coaxially connected to the mounting seat (2).

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