Blind rivet installation quality detection device and control method

Abstract

The invention relates to a blind rivet installation quality detection device and a control method, the blind rivet installation quality detection device comprises a first detection mechanism and a second detection mechanism, the first detection mechanism comprises a shooting assembly to collect image information of a blind rivet located on the outer side face of an automobile part, and the second detection mechanism comprises a detection main body and a plurality of first detection assemblies. Wherein the detection main body comprises a first accommodating space; according to the self-plugging rivet installation quality detection device, due to the fact that the technical means of combining visual detection and the pressure sensors is adopted, comprehensive detection of rivets inside and outside a part can be achieved, and especially through the first pressure sensor in the second detection mechanism, the detection accuracy is improved. The problem that in the prior art, the assembling quality of an expansion part of a rivet body in a part is difficult to detect can be effectively solved, the expansion quality and firmness of the rivet are ensured, and therefore the assembling quality of automobile parts and the reliability of products are improved.

Description

Technical Field

[0001] The invention relates to a rivet assembly quality detection device, in particular to a blind rivet installation quality detection device and a control method. Background Art

[0002] With the rapid development of the automobile industry, the assembly quality of automobile parts has received more and more attention. In particular, in the production process of automobile bodies and important structural parts, the process of connecting with blind rivets is widely used. Blind rivets have become an indispensable and important connection element in automobile manufacturing due to their reliable connectivity, shock resistance and simple operation. In this process, the rivet expands through the rivet core and tightens the parts. Therefore, ensuring the quality and accuracy of blind rivet installation is crucial to ensure the safety, stability and service life of the vehicle structure.

[0003] Existing methods for inspecting the installation quality of blind rivets usually rely on visual inspection and manual inspection to evaluate the expansion effect of the rivet body. Among them, the visual inspection device is mainly used to inspect the part of the rivet body exposed on the outer surface of the component. This makes inspection very difficult for the part of the rivet body that is located inside the component after expansion.

[0004] Therefore, with respect to the existing technology, it is difficult for the existing blind rivet detection system to effectively detect the expanded part of the rivet inside the component. On the one hand, although the image information of the rivet can be obtained through the visual device outside, the internal expanded part cannot be directly detected due to space limitations and viewing angle problems. On the other hand, the existing detection system mostly relies on manual or simple mechanical devices for rough detection, which makes it difficult to accurately and comprehensively judge the installation quality of the rivet. In summary, the existing detection method can only partially evaluate the installation quality of the rivet, and cannot fully ensure the quality and firmness of the expanded rivet body. For the expanded part of the rivet located inside the component, the existing technical means are usually unable to accurately obtain its expansion state, resulting in potential quality problems that may not be discovered in time. Summary of the invention

[0005] The object of the present invention is to provide a blind rivet installation quality detection device which combines visual detection with contact pressure detection to comprehensively detect the installation quality of the blind rivet.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: a device for detecting the installation quality of a blind rivet, wherein the blind rivet comprises a core rod and a rivet body, and is characterized in that it comprises: The first detection mechanism includes a shooting component.

[0007] The second testing agency includes: A detection body, wherein a first accommodating space is provided inside the detection body, and an opening communicating with the first accommodating space is provided on one side of an outer surface of the detection body along a first direction.

[0008] A plurality of first detection units, each of which is arranged in the first accommodating space, each of which includes two first detection components, the two first detection components are symmetrically arranged on both sides of the opening with the center line of the opening as the symmetry axis, and the distance between the two first detection components is a preset spacing, and the first detection components include: A first abutment member, wherein a moving direction of the first abutment member is limited to be perpendicular to a center line of the opening.

[0009] The first pressure sensor is disposed in the first accommodating space, and the first pressure sensor is configured to collect a first pressure value when under pressure.

[0010] A first feedback member, wherein one end of the first feedback member is in contact with the first pressure sensor.

[0011] A first transmission medium is arranged between the first abutment member and the first feedback member, and converts the displacement change of the first abutment member into a thrust change applied to the first feedback member. Moreover, the first transmission medium is configured so that when the first abutment member moves, the change of the thrust applied to the first feedback member is linearly correlated with the change of the displacement of the first abutment member.

[0012] Wherein, when the second detection mechanism is in a working state, the rivet body abuts against the first abutment member when inserted into the first accommodating space through the opening, forcing the first abutment member to move, so as to change the thrust applied by the first transmission medium to the first feedback member, so that the first pressure sensor detects a change in the first pressure value.

[0013] Preferably, the first detection component further includes: A guide wheel is arranged at one end of the first abutment member toward the center line of the opening.

[0014] Preferably, the second detection mechanism further includes: A plurality of second detection components, each of which is disposed in the first accommodating space and is disposed opposite to the opening, and the second detection components include: The second abutment member has a movement direction limited to be parallel to the first direction, and is configured to abut against an end of the rivet body away from the opening after the rivet body passes through the opening and is inserted into the first accommodating space.

[0015] The second pressure sensor is disposed in the first accommodating space, and the second pressure sensor is configured to collect a second pressure value when under pressure.

[0016] A second feedback member, one end of which is in contact with the second pressure sensor to apply pressure to the second pressure sensor.

[0017] The second transmission medium is arranged between the second abutment member and the second feedback member, and converts the displacement change of the second abutment member into the thrust change applied to the second feedback member. Moreover, the second transmission medium is configured so that when the second abutment member moves, the change of the thrust applied to the second feedback member is linearly correlated with the change of the displacement of the second abutment member.

[0018] When the second detection mechanism is in working state, the rivet body enters the first accommodating space through the opening and abuts against the second abutment member, forcing the second abutment member to move, so as to change the thrust applied by the second transmission medium to the second feedback member, so that the second pressure sensor detects a change in the second pressure value.

[0019] Preferably, the blind rivet installation quality inspection device also includes a positioning component, which moves in a controlled manner. The positioning component includes a mounting plate, and the second detection mechanism is arranged on the mounting plate. The positioning component is configured to align the opening of the detection body with the rivet body of the blind rivet installed on the automotive part when the second detection mechanism is in a working state, and move the opening toward the rivet body until the rivet body is immersed in the first accommodating space.

[0020] Preferably, the mounting plate comprises a mounting surface, and the mounting surface is perpendicular to the first direction when the second detection mechanism is in a working state.

[0021] The positioning component also includes: A first telescopic member is arranged at the mounting surface, the first telescopic member includes a first telescopic end, the first telescopic end is controllably telescopic, and the telescopic direction of the first telescopic end is configured to be parallel to the first direction when the second detection mechanism is in a working state, and the first telescopic end is connected to the detection body to drive the detection body to move.

[0022] Preferably, the positioning component further comprises: The first rack is arranged in the mounting plate, the first rack moves in a controlled manner, and the first rack is restricted to move along the second direction, and one end of the first rack extends to the outside of the mounting plate.

[0023] A second rack is arranged in the mounting plate, the second rack is arranged parallel to the first rack, the moving direction of the second rack is limited to be parallel to the moving direction of the first rack, and one end of the second rack away from the first rack extends to the outside of the mounting plate.

[0024] A transmission gear is arranged in the mounting plate, the transmission gear is located between the first rack and the second rack, and the transmission gear is meshed with the first rack and the second rack at the same time.

[0025] A first clamping member is disposed at one end of the first rack extending to the outside of the mounting plate.

[0026] A second clamping member is disposed at one end of the second rack extending to the outside of the mounting plate.

[0027] The second telescopic member is arranged on the mounting plate, and the second telescopic member includes a second telescopic end, the second telescopic end is controllably telescopic, and the second telescopic end is connected to the first rack to drive the first rack to move.

[0028] Wherein, the positioning assembly is configured so that when the second telescopic end moves, the first rack moves synchronously, causing the transmission gear to rotate, thereby causing the second rack to move synchronously with the first rack.

[0029] Preferably, a side of the detection body where the opening is formed is configured as a first plane, the first plane is perpendicular to the first direction, and the opening is located at the center of the first plane.

[0030] Preferably, the edge of the opening is constructed as a curved surface structure extending toward the first accommodating space.

[0031] Preferably, the second detection mechanism further includes: A plurality of first conduits are provided, each of the first conduits is arranged in the first accommodating space, each of the first detection components is arranged in the first conduit in a one-to-one correspondence, the posture of each of the first conduits is adapted to the corresponding first detection component, and the first abutment member and the first feedback member in the first conduit face opposite to each other and extend from the two ends of the first conduit to the first accommodating space respectively.

[0032] A plurality of second conduits, each of which is arranged in the first accommodating space, each of which is arranged in the second conduit in a one-to-one correspondence, the posture of each of which is adapted to the corresponding second detection component, and the second abutment member and the second feedback member in the second conduit facing opposite ends extend from the two ends of the second conduit to the first accommodating space respectively.

[0033] In particular, a control method for the above-mentioned blind rivet installation quality detection device includes: The mounting plate is moved to a target position inside the automobile part to be inspected by the positioning assembly, so that the opening of the inspection body is aligned with the expanded rivet body inside the automobile part, and the second inspection mechanism and the automobile part to be inspected are in a relatively static state.

[0034] The first telescopic end of the first telescopic member is controlled to extend so that the opening of the detection body moves toward a direction close to the rivet body.

[0035] If the rivet body cannot be inserted into the first accommodating space through the opening, it is determined that the rivet assembly quality does not meet the standard.

[0036] If the rivet body is inserted into the first accommodating space through the opening, the peripheral side and the end of the rivet body facing away from the opening will respectively abut against the first abutment member and the second abutment member, so that the first abutment member and the second abutment member move, causing the first pressure value collected by the first pressure sensor and the second pressure value collected by the second pressure sensor to change.

[0037] If the first pressure value collected by the first pressure sensor exceeds the allowable deviation range of the first target pressure value and / or the second pressure value collected by the second pressure sensor exceeds the allowable deviation range of the second target pressure value, the rivet installation quality is determined to be unqualified.

[0038] Beneficial effects of the embodiments of the present invention: The blind rivet installation quality detection device, due to the technical means of combining visual detection and pressure sensors, can realize comprehensive detection of the expanded parts of rivets inside and outside the parts, especially through the pressure sensor in the second detection mechanism, it can effectively solve the problem of difficulty in detecting the assembly quality of the expanded part of the rivet body inside the parts in the prior art. After the rivet is assembled, the expanded rivet body enters the first accommodating space through the opening, contacts the first abutment, forces it to move and produce a compressive effect, and then collects the change of the first pressure value through the first pressure sensor. The change of the first pressure value is positively correlated with the expansion degree of the rivet, and the quality of the expanded part of the rivet can be indirectly inferred. In this way, the pressure sensor can comprehensively evaluate the installation quality of the rivet, thereby improving the assembly quality of automotive parts and the reliability of the product.

[0039] The control method for the blind rivet installation quality detection device adopts the control method of the positioning component, the telescopic mechanism, the first pressure sensor and the second pressure sensor. The technical solution can accurately align the detection body with the expansion rivet body inside the automobile part, and judge the rivet installation quality by detecting the pressure change generated when the expansion rivet body is detected, which effectively solves the error problem of the expansion rivet body position and pressure detection in the prior art, thereby realizing high-precision and comprehensive detection of the rivet installation quality, ensuring the compliance of the rivet expansion part, and improving the assembly quality of automobile parts and the reliability of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic structural diagram of the second detection mechanism in an embodiment of the present invention when it is in a working state.

[0041] Figure 2 It is a schematic front cross-sectional view of the second detection mechanism in an embodiment of the present invention when it is in a working state.

[0042] Figure 3 The present invention Figure 2 Enlarged view of point A in the middle.

[0043] Figure 4 It is a schematic structural diagram of a positioning component and a second detection mechanism in a connected state in one embodiment of the present invention.

[0044] Figure 5 It is a schematic front view of a positioning assembly and a second detection mechanism in a connected state in one embodiment of the present invention.

[0045] Figure 6 It is a schematic structural diagram of a first rack in a transmission connection state with a second rack via a transmission gear in one embodiment of the present invention.

[0046] Figure 7 It is a schematic structural diagram of a blind rivet installation quality detection device in one embodiment of the present invention.

[0047] Among them: 100, first detection mechanism; 200, second detection mechanism; 210, detection body; 211, first accommodating space; 212, opening; 220, first detection component; 221, first abutment member; 222, first pressure sensor; 223, first feedback member; 224, first transmission medium; 230, guide wheel; 240, second detection component; 241, second abutment member; 242, second pressure sensor; 243, second feedback member; 244, second transmission medium; 300, positioning component; 310, mounting plate; 320, first telescopic member; 330, first rack; 340, second rack; 350, transmission gear; 360, first clamping member; 370, second clamping member; 380, second telescopic member. DETAILED DESCRIPTION

[0048] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0051] like Figure 1 As shown, a preferred embodiment of the present application provides a blind rivet installation quality detection device for detecting the assembly quality of blind rivets on automotive parts.

[0052] Among them, the blind rivet includes a core rod and a rivet body. In the process of using the blind rivet to install the part on the automobile part, first, it is necessary to align the rivet hole of the part with the rivet hole on the automobile part and make the two fit together, and then make the rivet body in the blind rivet pass through the two rivet holes at the same time, and then pull the core rod through the riveting equipment to expand the rivet body, so that the limiting structure and the expansion part of the rivet body itself simultaneously apply relative directional pressure to the part and the automobile part, fix the two together by pressure, thereby realizing a fixed connection between the part and the automobile part.

[0053] In order to perform quality inspection on rivets located on the outside of automotive parts, such as Figure 7As shown, the blind rivet quality inspection device in this embodiment includes a first inspection mechanism 100, which includes a shooting component to collect images of the blind rivets located on the outer side of the automotive component, and obtain information such as the rivet shape and expansion degree through a visual inspection system, so as to perform quality analysis on the rivet part located outside the automotive component. The visual inspection system for rivets is a prior art and does not need to be described in detail here.

[0054] In the prior art, the quality inspection of blind rivet installation usually relies on visual inspection or manual inspection to evaluate the expansion effect of the rivet body. Among them, the visual inspection device is mainly used to detect the part of the rivet body exposed on the outer surface of the component. However, for the part located inside the component after the rivet body expands, quality inspection will become more difficult.

[0055] Different from the prior art, the blind rivet quality inspection device in the present application also includes a second inspection mechanism 200. The first inspection component 220 in the second inspection mechanism 200 cooperates with the inspection body 210 to inspect the part of the rivet body located inside the component after expansion. The first inspection component 220 can indirectly obtain the structural information of the expanded part of the rivet body located inside the component through contact pressure feedback, thereby achieving the purpose of inspecting the quality of the expanded part of the rivet body located inside the component.

[0056] The second detection mechanism 200 includes a detection body 210 , a first accommodating space 211 is defined inside the detection body 210 , and an opening 212 communicating with the first accommodating space 211 is defined on one side of an outer surface of the detection body 210 along a first direction.

[0057] Specifically, the detection body 210 is embodied in a specific manner as a box body or a shell or any entity having a containing space and meeting the size requirements described below, such as Figures 2 to 3 As shown, taking the shell as an example, the shell is in the shape of a cylinder, and the space inside the shell is the first accommodating space 211. An opening 212 connected to the first accommodating space 211 is provided at the end face of one end of the cylinder along a direction (first direction) perpendicular to the end face, so as to facilitate the rivet body to be inserted into the first accommodating space 211.

[0058] Further, in some embodiments, the side of the detection body 210 with the opening 212 is constructed as a first plane, the first plane is perpendicular to the first direction, and the opening 212 is located at the center of the first plane. The first plane is the end face of one end of the detection body 210 in the shape of a cylinder. The first plane is abutted and fitted with the plane around the rivet hole located inside the automotive part, so that the rivet body part located inside the automotive part can be completely embedded in the detection body 210, so as to provide a standard detection position for the detection body 210.

[0059] It should be noted that the automotive parts used in the blind rivet installation quality inspection device in the present application must at least meet the requirement of being a plane around the rivet hole inside the automotive parts, and the plane is perpendicular to the opening direction of the rivet hole so as to abut and fit with the first plane on the opening 212 side of the inspection body 210.

[0060] The second detection mechanism 200 also includes a plurality of first detection units, each of which is arranged in the first accommodating space 211, and each of which includes two first detection components 220. The two first detection components 220 in each first detection unit are symmetrically arranged on both sides of the opening 212 with the center line of the opening 212 as the symmetry axis, and the distance between the two first detection components 220 is a preset spacing. The size of the preset spacing should not only meet the condition that it is smaller than the diameter of the rivet body after expansion, but also allow the expanded rivet body to be freely inserted between the two symmetrically arranged first detection components 220. The actual size of the preset spacing can be determined according to the standard size of the rivet body after expansion and experiments.

[0061] Furthermore, in order to fully detect the outer surface of the rivet body as much as possible, the gaps between adjacent first detection units are equal, that is, all first detection components 220 are arranged equidistantly around the circumference with the positive projection point of the center line of the opening 212 on the first plane as the center of the circle, that is, all-round detection of the outer peripheral surface of the rivet body is achieved. The relative spacing of the symmetrically arranged first detection components 220 is smaller than the size of the rivet body after expansion, which can ensure that the first detection components 220 can accurately measure the size and structural state of the rivet body after expansion, that is, when the expanded rivet body is inserted into the first accommodating space 211 through the opening 212, the rivet body periphery will abut against one end of each first detection component 220 facing the center line of the opening 212.

[0062] The first detection assembly 220 includes a first abutting member 221 , a first pressure sensor 222 , a first feedback member 223 and a first transmission medium 224 .

[0063] The moving direction of the first abutting member 221 is limited to be perpendicular to the center line of the opening 212 , and the first abutting member 221 is configured to abut against the outer peripheral side of the rivet body after the rivet body passes through the opening 212 and is inserted into the first accommodating space 211 .

[0064] Specifically, the first abutment member 221 is embodied as a rod member, such as Figure 3 As shown, the first abutment member 221 is installed in a first conduit to be described later, and the axial directions of the first abutment member 221 and the first conduit are perpendicular to the center line of the opening 212 .

[0065] Furthermore, the second detection mechanism 200 includes a plurality of first conduits, each of which is disposed in the first accommodating space 211, and each of the first detection components 220 is disposed in the first conduit in a one-to-one correspondence. The posture of each first conduit is adapted to the corresponding first detection component 220, and the first abutment member 221 and the first feedback member 223 in the first conduit are oppositely facing ends that extend from the two ends of the first conduit to the first accommodating space 211, respectively.

[0066] Specifically, Figure 3 As shown, each first conduit is fixedly installed in the first accommodating space 211, and the position and posture of each first conduit are adapted to the position and posture of the corresponding first detection assembly 220. The opposite ends of the first abutment member 221 and the first feedback member 223 can respectively abut against the outer peripheral side of the rivet body of the insertion opening 212 and the first pressure sensor 222, so as to obtain accurate first pressure value change data.

[0067] The first pressure sensor 222 is disposed in the first accommodating space 211 , and is configured to collect a first pressure value when under pressure, where the first pressure value is the thrust applied by the first feedback member 223 to the first pressure sensor 222 .

[0068] Specifically, the first pressure sensor 222 is installed on the inner wall of the first accommodating space 211 to cooperate with the first feedback member 223 to abut against the force of the first feedback member 223 in real time. In particular, after the rivet body is embedded in the opening 212 and abuts against the end of the first abutment member 221, the thrust applied by the first abutment member 221 to the first feedback member 223 through the first transmission medium 224 changes, and the first pressure sensor 222 can timely record the real-time change value of the first pressure value in this process, and compare this real-time change value with the standard change value of the first pressure value detected when the rivet body is expanded in a standard manner to determine whether the deviation between the two is less than the allowable deviation, thereby determining the structural condition of the rivet body after expansion, so as to provide a comprehensive judgment basis for whether the blind rivet is firm. Among them, the allowable deviation is the deviation of the structural dimensions of the rivet body after expansion under the premise of ensuring mechanical properties, which can be obtained through experiments and will not be elaborated here.

[0069] One end of the first feedback member 223 facing away from the first abutting member 221 abuts against the first pressure sensor 222 to apply pressure to the first pressure sensor 222 .

[0070] Specifically, the first feedback member 223 is also embodied as a rod in a specific manner, and the rod is also installed in the corresponding first conduit. Under the action of the first transmission medium 224, the first feedback member 223 can indirectly feedback the moving distance of the first abutment member 221 by applying thrusts of different sizes to the first pressure sensor 222, thereby achieving the purpose of detecting the expansion structure of the rivet body.

[0071] The first transmission medium 224 is disposed between the first abutting member 221 and the first feedback member 223 to convert the displacement change of the first abutting member 221 into the thrust change applied to the first feedback member 223, and the first transmission medium 224 is configured so that when the first abutting member 221 moves, the thrust change applied to the first feedback member 223 is linearly related to the displacement change of the first abutting member 221, that is, the greater the moving distance of the first abutting member 221, the greater the thrust applied to the first feedback member 223, so that the greater the thrust applied to the first pressure sensor 222 by the first feedback member 223, the greater the first pressure value collected by the first pressure sensor 222, and vice versa. Wherein, when the second detection mechanism 200 is in the working state, the rivet body enters the first accommodating space 211 through the opening 212 and abuts against the first abutting member 221, so as to force the first abutting member 221 to move, thereby changing the thrust applied to the first feedback member 223 by the first transmission medium 224, so that the first pressure value collected by the first pressure sensor 222 changes.

[0072] Specifically, the first transmission medium 224 can be embodied as an elastic member such as a spring, and the deformation of these elastic members is linearly related to the elastic force applied to the outside. When one end of the first abutting member 221 abuts against the side of the rivet body embedded in the opening 212, the first abutting member 221 squeezes the spring to compress it, and the elastic force applied by the spring to the first feedback member 223 after compression will increase. This increased elastic force will be fed back to the first pressure sensor 222 under the action of the first feedback member 223, so that the first pressure sensor 222 detects the change of the first pressure value.

[0073] Through the design of the first detection assembly 220, the second detection mechanism 200 can effectively detect the structural features of the expanded rivet body, generate accurate pressure value data, and indirectly infer the structural dimensions of the expanded part of the rivet body through the pressure value data to further analyze the assembly quality of the rivet.

[0074] The working process of the device is based on the comprehensive application of pressure sensors and visual detection, and the steps are as follows: First, the mounting plate 310 described later is accurately positioned at a target position inside the automobile component by means of the positioning assembly 300 described later, ensuring that the opening 212 of the detection body 210 is aligned with the expanded portion of the rivet body.

[0075] Then, the first telescopic end of the first telescopic member 320 is controlled to extend, so that the detection body 210 moves toward the direction of expanding the rivet body, and ensures that the rivet body completely enters the detection area until the first plane is in contact with the plane around the rivet hole inside the automobile part.

[0076] After the expansion rivet body enters the opening 212 , it contacts the first abutting member 221 . The first abutting member 221 is forced to move, and during the movement, the first transmission medium 224 is elastically deformed, thereby changing the elastic force applied to the first feedback member 223 .

[0077] Then, as the elastic force applied by the first transmission medium 224 to the first feedback member 223 changes, the thrust applied by the first feedback member 223 to the first pressure sensor 222 also changes accordingly, causing the first pressure value sensed by the first pressure sensor 222 to change.

[0078] Finally, the expansion degree and assembly quality of the rivet body are determined by analyzing the change of the first pressure value collected by the first pressure sensor 222 and combining it with the preset target pressure value. If the pressure exceeds the allowable range, the rivet assembly is determined to be unqualified.

[0079] In this embodiment, due to the use of technical means combining visual inspection and pressure sensors, comprehensive inspection of the expanded parts of rivets inside and outside the parts can be achieved. In particular, the pressure sensor in the second inspection mechanism 200 can effectively solve the problem of difficulty in inspecting the assembly quality of the expanded part of the rivet body inside the parts in the prior art. After the rivet is assembled, the expanded rivet body enters the first accommodating space 211 through the opening 212, contacts the first abutment 221, forces it to move and produce a compressive effect, and then collects the change of the first pressure value through the first pressure sensor 222. The change of the first pressure value is positively correlated with the expansion degree of the rivet, and the quality of the expanded part of the rivet can be indirectly inferred. In this way, the first pressure sensor 222 can evaluate the installation quality of the rivet, thereby effectively overcoming the problems of difficulty in inspecting the assembly quality of the rivet body inside the automobile parts and inaccurate inspection in the prior art, and providing an efficient and reliable quality inspection tool for the automobile production process.

[0080] It should be noted that the number of the second detection mechanisms 200 in the present application should correspond to the number of rivets on the automotive parts, and the specific number should be set according to actual needs, which will not be elaborated here.

[0081] Further, if Figure 3 As shown, in some embodiments, the edge of the opening 212 is configured as a curved surface extending toward the first accommodating space 211. The first detection assembly 220 further includes a guide wheel 230, which is disposed at one end of the first abutment member 221 toward the center line of the opening 212.

[0082] Specifically, the curved surface structure constructed at the edge of the opening 212 can make the expanded rivet body smoother when entering the opening 212, ensuring the accuracy of the docking position, especially in cooperation with the guide wheel 230 at the end of the first abutment 221, the expanded part of the rivet body is guided into the opening 212 through the curved surface structure and will first contact the guide wheel 230 before contacting the first abutment 221, thereby avoiding motion interference between the first abutment 221 and the rivet body, so that the rivet body entering the opening 212 can be better guided to the detection position.

[0083] In the present embodiment, by constructing the edge of the opening 212 as a curved surface structure extending toward the first accommodating space 211, and installing a guide wheel 230 at one end of the center line of the first abutment 221 toward the opening 212, the rivet body can be prevented from directly contacting the sharp edge, thereby reducing the risk of wear of the equipment during long-term use. In addition, as the rivet body continues to move into the first accommodating space 211, the expanded portion of the rivet body will be guided by the guide wheel 230 to ensure that the rivet body is in stable contact with the first abutment 221, thereby improving the accuracy of the rivet body entering the detection space, and by reducing friction wear and orderly guidance, the stability and service life of the device are enhanced, so that the present invention can provide more accurate and reliable blind rivet assembly quality detection in practical applications.

[0084] However, the first detection assembly 220 can only detect the peripheral side of the rivet body. In order to further detect the end face of the rivet body, in some embodiments, such as Figure 3 As shown, the second detection mechanism 200 also includes a plurality of second detection components 240. Each second detection component 240 is disposed in the first accommodating space 211 and is disposed opposite to the opening 212. The second detection component 240 includes a second abutment member 241, a second pressure sensor 242, a second feedback member 243 and a second transmission medium 244.

[0085] The moving direction of the second abutting member 241 is limited to be parallel to the first direction (i.e., the centerline direction of the opening 212), and the second abutting member 241 is configured to abut against the end of the rivet body after the rivet body passes through the opening 212 and enters the first accommodating space 211. The second pressure sensor 242 is arranged in the first accommodating space 211, and the second pressure sensor 242 is configured to collect the second pressure value when under pressure. One end of the second feedback member 243 abuts against the second pressure sensor 242 to apply pressure to the second pressure sensor 242. The second transmission medium 244 is arranged between the second abutting member 241 and the second feedback member 243, converting the movement of the second abutting member 241 into a thrust applied to the second feedback member 243, and the second transmission medium 244 is configured so that when the second abutting member 241 moves, the magnitude of the thrust applied to the second feedback member 243 is positively correlated with the moving distance of the second abutting member 241.

[0086] The second detection assembly 240 is installed in the second conduit described later, and the axial directions of the second abutment member 241 and the second conduit are parallel to the center line of the opening 212 .

[0087] Furthermore, the second detection mechanism 200 includes a plurality of second conduits, each of which is disposed in the first accommodating space 211, and each second detection component 240 is disposed in the second conduit in a one-to-one correspondence. The posture of each second conduit is adapted to the corresponding second detection component 240, and the opposite ends of the second abutment member 241 and the second feedback member 243 in each second conduit extend from the two ends of the corresponding second conduit to the first accommodating space 211 respectively.

[0088] The second conduit is fixedly installed in the first accommodating space 211 to guide and support the second detection assembly 240, so that each second detection assembly 240 can accurately move in the first accommodating space 211 and accurately contact the rivet body. Specifically, the fixing member used to fix the second conduit is embodied in a specific manner as a structural member with a fixing effect such as a fixing frame and a fixing seat. It is only necessary to ensure that the fixing member does not affect the normal operation of the second detection mechanism 200. Similarly, the fixing method of the first conduit is the same as the fixing method of the second conduit, and will not be repeated here.

[0089] When the second detection mechanism 200 is in working state, the rivet body is inserted into the first accommodating space 211 through the opening 212 and abuts against one end of the second abutment member 241 toward the opening 212, forcing the second abutment member 241 to move under pressure to change the thrust applied by the second transmission medium 244 to the second feedback member 243, so that the second pressure sensor 242 detects a change in the second pressure value.

[0090] Specifically, the second abutment member 241 and the second feedback member 243 are both rods, and the second transmission medium 244 is a linearly variable elastic member such as a spring. The structure, connection relationship and detection principle of the second detection assembly 240 are the same as those of the first detection assembly 220, and will not be described in detail here.

[0091] When the second detection mechanism 200 is in working state, the expanded part of the assembled blind rivet will enter the first accommodating space 211 through the opening 212 , and the end of the rivet body (the end facing away from the opening 212 ) will abut against the second abutment member 241 .

[0092] The second abutting member 241 is subjected to pressure under the action of the rivet body, thereby causing displacement, and the displacement change is converted into a thrust change applied to the second feedback member 243 through the second transmission medium 244 .

[0093] As the thrust changes, the second pressure sensor 242 senses the change in the second pressure value and feeds this data back to the control system.

[0094] By comparing the obtained real-time second bearing pressure value with the preset target pressure value, it can be determined whether the dimensional structure of the rivet body after expansion meets the assembly standard, thereby realizing the detection of the rivet assembly quality.

[0095] Furthermore, when the second detection assembly 240 works together with the first detection assembly 220, the two can jointly perform a comprehensive quality inspection on the expanded part of the rivet body (the outer peripheral side and end of the expanded rivet body). The coordinated effect of the two can provide more accurate rivet position and expansion degree, thereby achieving more comprehensive installation quality data.

[0096] The detection point of the second detection component 240 is different from that of the first detection component 220. It is arranged opposite to the opening 212 of the detection body 210, and can detect the end of the rivet body after expansion, thereby providing pressure data at different positions of the expanded part of the rivet body to supplement the overall assembly quality of the rivet. The layout and function of the second detection component 240 increase the diversity and redundancy of the measurement, and ensure the accuracy of the rivet assembly at different positions.

[0097] The function of the second pressure sensor 242 is similar to that of the first pressure sensor 222, but because it is located near the opening 212, it can supplement and calibrate the detection data of the first pressure sensor 222. When the expanded part of the rivet enters through the opening 212, the two groups of pressure sensors work together to monitor the size and position changes of the expanded rivet from different angles. In addition, the existence of the second detection assembly 240 enables the system to respond more sensitively and accurately under different pressure changes.

[0098] This embodiment realizes multi-dimensional detection of the expansion state of the rivet body by adding a second abutment member 241, a second pressure sensor 242, a second feedback member 243 and a second transmission medium 244 to the second detection component 240, and also ensures accurate monitoring of the assembly quality through a pressure feedback mechanism. Overall, the design of the second detection component 240 further improves the accuracy and reliability of the rivet installation quality detection device, and provides a strong guarantee for achieving high-quality automobile parts assembly. Once the actual pressure value and the target pressure value exceed the set deviation range, it can be determined that the assembly quality of the rivet is unqualified, preventing poorly assembled parts from entering the subsequent production links.

[0099] It should be noted that the distance from the second abutment member 241 in the second detection assembly 240 located in the first accommodating space 211 to the opening 212 should be smaller than the height of the rivet body after expansion inside the automotive component, so as to ensure that the end of the second abutment member 241 is in full contact with the end of the rivet body, thereby realizing the detection of the end of the rivet body.

[0100] In order to enable the opening 212 on each detection body 210 to be quickly aligned with the expansion portion of the rivet body inside the automobile part, in some embodiments, such as Figures 4 to 6 As shown, a blind rivet installation quality inspection device also includes a positioning component 300, which moves in a controlled manner. Specifically, the positioning component 300 includes a mounting plate 310, and the second inspection mechanism 200 is arranged on the mounting plate 310. The positioning component 300 is configured to align the opening 212 of the inspection body 210 with the rivet body of the blind rivet installed on the automotive part when the second inspection mechanism 200 is in a working state, and move the opening 212 toward the rivet body until the rivet body is immersed in the first accommodating space 211.

[0101] Furthermore, the positioning assembly 300 also includes a mounting plate 310 , a first telescopic member 320 , a first rack 330 , a second rack 340 , a transmission gear 350 , a first clamping member 360 , a second clamping member 370 and a second telescopic member 380 .

[0102] The mounting plate 310 includes a mounting surface, which is perpendicular to the first direction when the second detection mechanism 200 is in the working state. The first telescopic member 320 is arranged at the mounting surface, and includes a first telescopic end, which is controllably telescopic, and the telescopic direction of the first telescopic end is configured to be parallel to the first direction when the second detection mechanism 200 is in the working state, and the first telescopic end is connected to the detection body 210 to drive the detection body 210 to move.

[0103] The first rack 330 is disposed in the mounting plate 310, and the first rack 330 is limited to be controlled to move in the second direction, and one end of the first rack 330 extends to the outside of the mounting plate 310. The second rack 340 is disposed in the mounting plate 310, and the second rack 340 is disposed in parallel with the first rack 330, and the moving direction of the second rack 340 is limited to be parallel to the moving direction of the first rack 330, and one end of the second rack 340 away from the first rack 330 extends to the outside of the mounting plate 310. The transmission gear 350 is disposed in the mounting plate 310, and the transmission gear 350 is located between the first rack 330 and the second rack 340, and the transmission gear 350 is meshed with the first rack 330 and the second rack 340 at the same time, so that the second rack 340 is connected to the first rack 330 in a transmission manner. The first clamping member 360 is disposed at one end of the first rack 330 extending to the outside of the mounting plate 310, and the second clamping member 370 is disposed at one end of the second rack 340 extending to the outside of the mounting plate 310. The second telescopic member 380 is disposed on the mounting plate 310, and the second telescopic member 380 includes a second telescopic end, which is controllably telescopic and connected to the first rack 330 to drive the first rack 330 and the mounting plate 310 to move relative to each other, thereby controlling the relative movement of the first rack 330 and the mounting plate 310.

[0104] The positioning assembly 300 is configured such that when the second telescopic end moves, the first rack 330 moves synchronously, so that the transmission gear 350 rotates, and the second rack 340 moves synchronously with the first rack 330 .

[0105] Specifically, the positioning assembly 300 is to ensure the working accuracy and reliability of the second detection mechanism 200, especially in the process of component detection after the rivet assembly is completed, to accurately align the opening 212 of the detection body 210 of the second detection mechanism 200 with the rivet body expansion part located inside the automobile component. Specifically, the positioning assembly 300 includes a plurality of mutually coordinated components, which can provide accurate positioning and stable driving support, making the detection process more accurate and efficient.

[0106] The mounting plate 310 is the basic structure of the positioning assembly 300, and is controlled to move and provide support. The mounting surface is perpendicular to the first direction, ensuring that the relative position of the mounting plate 310 and the detection body 210 meets the accuracy requirements.

[0107] The first telescopic member 320 includes a first telescopic end, which can be controlled to telescope as needed. Its main function is to drive the movement of the detection body 210 so that the opening 212 of the detection body 210 can be accurately aligned with the assembled rivet body. The first telescopic member 320 and the second telescopic member 380 are specifically embodied as a mechanism that can achieve linear telescoping, such as an electric cylinder or a pneumatic cylinder.

[0108] The first rack 330 and the second rack 340 are arranged in parallel in the mounting plate 310 , and are connected to each other through a transmission gear 350 . Their coordinated movement ensures stable alignment of the detection body 210 .

[0109] The first clamping member 360 and the second clamping member 370 are respectively fixed at the opposite ends of the first rack 330 and the second rack 340. When the first clamping member 360 and the second clamping member 370 move relative to each other, the mounting plate 310 and the clamped member can be in a relatively static state, that is, the positioning assembly 300 is fixed on the clamped member. In this application, the clamped member is an automobile part, so that the first telescopic member 320 is more stable during operation, avoiding detection errors caused by loose parts or position displacement. It should be noted that when the positioning assembly 300 is fixed on the clamped member, each detection body 210 is exactly aligned with the expanded rivet body located in the automobile part. The specific implementation method needs to design the positioning assembly 300 according to the actual structure and size of the automobile part.

[0110] The first telescopic member 320 controls the movement of the first telescopic end so that the detection body 210 can be moved and positioned along the first direction. The second telescopic member 380 drives the movement of the first rack 330 by controlling the movement of the second telescopic end, thereby driving the synchronous movement of the second rack 340. The first rack 330 and the second rack 340 ensure the parallelism and synchronization of the movement trajectory by meshing with the transmission gear 350. In addition, the size and stroke of the first rack 330 and the second rack 340 must also be adapted to the requirement that the opening 212 of the detection body 210 is aligned with the expansion rivet body. Furthermore, the synchronous action of the first rack 330 and the second rack 340 avoids possible displacement errors and ensures the effect of precise alignment.

[0111] The positioning assembly 300 ensures that the mounting plate 310 is fixed at the target position of the automotive component by precisely controlling the synchronous movement of the first rack 330 and the second rack 340, so that the opening 212 of the detection body 210 is precisely aligned with the expanded part of the rivet body, and the first telescopic member 320 can move the opening 212 of the detection body 210 toward the rivet body, so that the expanded part of the rivet body is completely immersed in the first accommodating space 211 from the opening 212. Therefore, this high-precision positioning mechanism is essential for the accurate detection of the rivet installation quality. When the second detection mechanism 200 is in working state, the positioning assembly 300 not only plays a mechanical transmission role, but also ensures the stable alignment of the detection body 210, so that the entire detection process can be carried out accurately.

[0112] In addition, the precise control of the positioning assembly 300 enables the second detection mechanism 200 to detect the assembled rivets at a precise angle and position. The blind rivet installation quality detection device in the present application can evaluate the quality of rivet assembly in real time through the cooperation of the first pressure sensor 222, the second pressure sensor 242 and the first detection mechanism 100. Among them, the stability and accuracy of the positioning assembly 300 directly determine the docking accuracy of the detection body 210, thereby affecting the final quality detection result. If the positioning is not accurate, the data collected by the pressure sensor may be inaccurate, thereby affecting the quality evaluation.

[0113] This embodiment uses the positioning assembly 300 to ensure the accurate positioning of the second detection mechanism 200 during operation, thereby enhancing the stability and accuracy of the overall system. Through the cooperation of the rack transmission mechanism and the telescopic mechanism, the positioning assembly 300 can efficiently and accurately align the opening 212 of the detection body 210 with the expanded part of the rivet body, providing solid support for the detection of the rivet assembly quality, and further improving the reliability and application scope of the detection system.

[0114] In order to better control the operation of a blind rivet installation quality detection device, a control method for a blind rivet installation quality detection device is proposed, comprising: The mounting plate 310 is moved to the target position inside the automobile part to be inspected by the positioning assembly 300, so that the opening 212 of the inspection body 210 is aligned with the expanded rivet body inside the automobile part, and the second inspection mechanism 200 and the automobile part to be inspected are in a relatively static state.

[0115] The first telescopic end of the first telescopic member 320 is controlled to extend, so that the opening 212 of the detection body 210 moves toward a direction close to the rivet body.

[0116] If the rivet body cannot be inserted into the first accommodation space 211 through the opening 212 , it is determined that the rivet assembly quality does not meet the standard.

[0117] If the rivet body enters the first accommodating space 211 through the opening 212, the peripheral side and the end of the rivet body away from the opening 212 will respectively abut against each first abutting member 221 and each second abutting member 241, so that the first abutting member 221 and the second abutting member 241 move, so that the first pressure value collected by the first pressure sensor 222 and the second pressure value collected by the second pressure sensor 242 both change.

[0118] If the first pressure value collected by the first pressure sensor 222 exceeds the allowable deviation range of the first target pressure value and / or the second pressure value collected by the second pressure sensor 242 exceeds the allowable deviation range of the second target pressure value, the rivet installation quality is determined to be unqualified.

[0119] The control method is applied to the quality inspection device of the expanded part of the rivet body inside the automobile part after the blind rivet is assembled with the parts and automobile parts, so as to detect the expansion state of the rivet body inside the automobile part, thereby ensuring that the blind rivet meets the predetermined assembly quality standard.

[0120] The positioning assembly 300 is responsible for fixing the mounting plate 310 to the target position inside the automotive part to ensure that the opening 212 of the detection body 210 is aligned with the expanded part of the rivet body, wherein the target position is selected according to the shape, structure and size of the actual automotive part, and the target position must satisfy that when the mounting plate 310 is fixed to the position, the opening 212 of each detection body 210 is just aligned with the expanded part of the rivet body inside the automotive part. The size, shape and fixing method of the mounting plate 310 and the positioning assembly 300 must ensure sufficient stability and accuracy during the assembly process, and the positioning assembly 300 is usually installed on a robot arm.

[0121] The first telescopic member 320 is used to control the movement of the detection body 210. When the first telescopic end of the telescopic member is extended, the detection body 210 is moved closer to the rivet body. By precisely controlling the movement of the first telescopic member 320, it is possible to ensure that the opening 212 of the detection body 210 is aligned with the expanded part of the rivet body for subsequent pressure detection.

[0122] The first accommodating space 211 of the detection body 210 is used to accommodate the expansion rivet body, and the space is connected to the outside through the opening 212 .

[0123] Specifically, the positioning assembly 300 fixes the mounting plate 310 at the target position inside the automotive component to ensure that the opening 212 of the detection body 210 is aligned with the expanded rivet body inside the component. This process ensures the accuracy of the entire detection process. The first telescopic member 320 extends its first telescopic end so that the detection body 210 approaches the expanded part of the rivet, thereby allowing the expanded part of the rivet body to enter the first accommodating space 211. The opening 212 of the first accommodating space 211 docks with the expanded part of the rivet. If the rivet body fails to enter the first accommodating space 211 through the opening 212, the system will automatically determine that the rivet assembly quality does not meet the standards. (That is, by determining whether the extension of the first telescopic end reaches a preset length, the preset length can be obtained by measuring the standard expanded rivet body on the corresponding automotive component.) When the detection body 210 moves toward the rivet, if the expandable rivet body can be completely inserted into the first accommodating space 211 through the opening 212, the surrounding side and the side away from the opening 212 of the expandable rivet body will contact the first detection components 220 and the second detection components 240 respectively.

[0124] The first abutment 221 and the second abutment 241 are responsible for abutting against the circumference and end of the expanded part of the rivet body. After the expanded part of the rivet body is completely immersed in the opening 212, the displacement changes of the first abutment 221 equidistantly distributed around the circumference of the rivet body and the second abutment 241 distributed at one end of the rivet body can be converted into pressure changes. The first abutment 221 and the second abutment 241 are each provided with a corresponding first pressure sensor 222 and a second pressure sensor 242, which are used to monitor the pressure changes generated by the expansion of the rivet body in real time.

[0125] Each of the first pressure sensor 222 and the second pressure sensor 242 transmits a pressure signal to the control system when receiving the pressure change caused by the expansion of the rivet body. If the pressure exceeds the preset range, the control system will determine that the rivet installation quality is unqualified.

[0126] Specifically, when the rivet body successfully enters the first accommodating space 211, the side and end of the expanded part will contact the first abutment 221 and the second abutment 241 respectively, forcing them to change position. Since the rivet body forces the first abutment 221 and the second abutment 241 to move, the pressure values ​​(first pressure value and second pressure value) collected by the corresponding pressure sensors (such as the first pressure sensor 222 and the second pressure sensor 242) will change. The control system will compare the collected pressure value with the preset target pressure value. If the pressure value exceeds the allowable deviation range, it is determined that the rivet installation quality is unqualified.

[0127] It can be understood that the target pressure value can be obtained by testing the standard expanded rivet body on the corresponding automotive parts, and the deviation value is the excess deformation of the expanded part of the rivet body allowed without affecting the rivet assembly quality, which can be set according to actual conditions.

[0128] The target pressure value and the deviation value can be obtained by the following method: First, prepare the sample. In the laboratory or production environment, select qualified blind rivets (meeting the size, material and process standards) and install them on standard automotive parts to ensure that the expansion part of the rivet body reaches the ideal state (no deformation, uniform expansion). In addition, prepare multiple groups of standard samples (at least 20 groups are recommended) for the same model of rivets, covering different production batches and material fluctuation ranges, to improve the generalization of standard data.

[0129] Next, standard data collection is performed. The above-mentioned detection device is fixed at a predetermined position of the standard sample, and the positioning component 300 is used to ensure that the opening 212 of the detection body 210 is accurately aligned with the expansion rivet body. The first telescopic end is controlled to push the detection body 210 so that the rivet body completely enters the first accommodating space 211 to trigger the pressure feedback of the first detection component 220 and the second detection component 240.

[0130] Then, each first pressure value (steady-state pressure value (unit: N) of each first pressure sensor 222 after the rivet body is fully inserted) and each second pressure value (steady-state pressure value (unit: N) of each second pressure sensor 242 after the rivet body end abuts). In addition, when recording each first pressure value and each second pressure value, it is also necessary to draw a corresponding pressure change curve (a dynamic curve of the pressure change of each sensor over time during the rivet body insertion process (used to analyze the dynamic response of the expansion structure)).

[0131] Finally, the data is processed and stored. The mean value of the sensor data for each group of samples is calculated ( ) and standard deviation ( ), determine the allowable deviation range (for example: ). Establish a feature database, store the mean value, allowable deviation range and dynamic curve characteristics (such as pressure peak and slope) in the system database, and manage them by rivet model and batch classification. And use statistical methods (such as Grubbs test) to eliminate outliers to ensure the reliability of standard data.

[0132] The method for comparing the collected pressure values ​​(the first pressure value and the second pressure value) with the preset target pressure value is specifically described as follows: First, data synchronization and preprocessing are performed. The first pressure bearing value and the second pressure bearing value collected in real time are low-pass filtered to eliminate mechanical vibration or electromagnetic interference noise. When the detection body 210 is completely fitted with the rivet body of the expansion part, the steady-state pressure value of each sensor is extracted as the measured data.

[0133] The detection body 210 and the rivet body of the expansion part are completely fitted by the first telescopic distance of the first telescopic member 320, because when the telescopic distance of the first telescopic end reaches the target distance, if the trade expansion part meets the requirements, it should just completely enter the opening 212. The telescopic distance of the first telescopic end can be determined in a specific manner when the first telescopic member 320 is an electric cylinder, which can be determined by a motor encoder.

[0134] Next, the deviation of the pressure value of each sensor is determined. Specifically, for each first pressure sensor 222 and second pressure sensor 242, if the deviation rate of any sensor exceeds a preset threshold (such as 5%), it is marked as a local defect (such as insufficient expansion, eccentric deformation).

[0135] Furthermore, multi-sensor collaborative analysis includes: Circumferential uniformity detection (for the first detection component 220): The range (the difference between the maximum value and the minimum value) of the measured values ​​of all the first pressure sensors 222 on the same circumference is calculated.

[0136] If the range exceeds 1.5 times the range of the standard sample, it is judged as uneven circumferential expansion (such as elliptical deformation).

[0137] End surface flatness detection (for the second detection component 240): The measured values ​​of the second pressure sensors 242 are compared. If there is a significant difference (such as abnormally low pressure at a single point), it is determined that the end surface is collapsed or tilted.

[0138] Furthermore, the expansion part of the rivet can be detected by dynamic curve matching. Specifically, the real-time pressure change curve can be matched with the standard dynamic curve by the dynamic time warping (DTW) algorithm. If the curve shape is significantly different (such as peak delay, slope abnormality), it is judged as an assembly process defect (such as abnormal material flow caused by improper core pulling speed).

[0139] It should also be noted that the second detection mechanism 200 needs to be calibrated regularly during use. Specifically, a standard calibration module (a rigid part simulating the ideal rivet body size) can be used to calibrate the detection device regularly to correct the sensor zero drift and the transmission medium aging error. The specific calibration process is as follows: The calibration module is inserted into the detection body 210 , and the reference pressure values ​​of the first pressure sensor 222 and the second pressure sensor 242 are recorded.

[0140] If the measured value deviates from the theoretical value by more than 1%, the automatic compensation algorithm will be triggered or manual maintenance will be prompted.

[0141] Furthermore, with adaptive learning, the system can automatically update the mean and deviation range in the standard database for the inspection data of the same batch of rivets to adapt to slight fluctuations in the production process. If new defect patterns are found in multiple inspections (such as abnormal systemic pressure at a specific location), the system generates an early warning and prompts the process parameters to be adjusted.

[0142] In summary, the control method for the blind rivet installation quality detection device is based on real-time pressure monitoring and data feedback, and can timely detect unqualified rivet installation during the assembly process and perform automatic adjustments or warnings.

[0143] Furthermore, the above control method is suitable for industrial environments that require precise control of the rivet expansion process, especially for parts assembly lines in automobile manufacturing. The control method can also be used to process rivets of different sizes and pressure ranges to ensure that the expansion state of different rivets can be accurately determined. The following is a specific detection example: A car door panel uses blind rivets to fix the interior parts. The inspection steps are as follows: Standard data call: The system loads the corresponding pressure average value (first pressure sensor 222: 12.5±0.6N, second pressure sensor 242: 8.2±0.4N) according to the rivet model (such as SP5.0).

[0144] Real-time detection: The measured values ​​of the first pressure sensor 222 group are [12.1N, 13.0N, 11.8N, 12.7N], with a range of 1.2N (standard range ≤ 0.9N), triggering a circumferential unevenness alarm.

[0145] The measured values ​​of the second pressure sensor 242 are [8.3N, 8.1N, 7.5N], and the pressure at the third point is lower than the allowable range (7.5N<8.2-0.4=7.8N), and it is determined that the end face has collapsed.

[0146] Result output: The system marks the rivet as "unqualified", the defect type is "uneven circumferential expansion (elliptical deformation) + end face collapse", and records it in the quality traceability system.

[0147] Through the above method, the system can accurately identify the dimensional deviation, shape deformation and assembly process defects after the rivet body expands, ensure the connection reliability of automotive parts, and optimize the production process through data-driven.

[0148] This control method can accurately monitor the pressure value and judge whether the rivet is up to standard in real time during its expansion process, effectively improving the assembly quality. Secondly, it can judge the expansion state of the rivet and provide timely feedback without manual intervention, reducing human errors and assembly deviations. Moreover, this method can be applied to different types of rivets and parts, and has strong versatility. Therefore, this control method reduces the risk of unqualified rivets through accurate detection and timely adjustment, thereby reducing rework and material waste, improving production efficiency, and improving product quality, and is particularly suitable for modern and automated production environments.

[0149] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, as long as they do not deviate from the contents of the present specification or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A blind rivet installation quality detection device, wherein: The blind rivet comprises a core rod and a rivet body, and is characterized in that it comprises: The first detection mechanism includes a shooting component; The second testing agency includes: A detection body, wherein a first accommodating space is provided inside the detection body, and an opening communicating with the first accommodating space is provided on one side of an outer surface of the detection body along a first direction; A plurality of first detection units, each of which is arranged in the first accommodating space, each of which includes two first detection components, the two first detection components are symmetrically arranged on both sides of the opening with the center line of the opening as the symmetry axis, and the distance between the two first detection components is a preset spacing, and the first detection components include: a first abutment member, wherein a movement direction of the first abutment member is limited to be perpendicular to a center line of the opening; A first pressure sensor is disposed in the first accommodating space, and the first pressure sensor is configured to collect a first pressure value when under pressure; a first feedback member, one end of which is in contact with the first pressure sensor; a first transmission medium, disposed between the first abutment member and the first feedback member, for converting a displacement change of the first abutment member into a thrust change applied to the first feedback member, and the first transmission medium is configured such that when the first abutment member moves, a change in the thrust applied to the first feedback member is linearly correlated with a change in the displacement of the first abutment member; Wherein, when the second detection mechanism is in a working state, the rivet body abuts against the first abutment member when inserted into the first accommodating space through the opening, forcing the first abutment member to move, so as to change the thrust applied by the first transmission medium to the first feedback member, so that the first pressure sensor detects a change in the first pressure value.

2. A blind rivet installation quality detection device according to claim 1, characterized in that: The first detection component also includes: A guide wheel is arranged at one end of the first abutment member toward the center line of the opening.

3. A blind rivet installation quality detection device according to claim 1, characterized in that: The second detection mechanism also includes: A plurality of second detection components, each of which is disposed in the first accommodating space and is disposed opposite to the opening, and the second detection components include: a second abutment member, wherein the movement direction of the second abutment member is limited to be parallel to the first direction, and the second abutment member is configured to abut against an end of the rivet body away from the opening after the rivet body is inserted into the first accommodating space through the opening; A second pressure sensor is disposed in the first accommodating space, and the second pressure sensor is configured to collect a second pressure value when under pressure; a second feedback member, wherein one end of the second feedback member abuts against the second pressure sensor to apply pressure to the second pressure sensor; a second transmission medium disposed between the second abutting member and the second feedback member, converting a displacement change of the second abutting member into a thrust change applied to the second feedback member, and the second transmission medium is configured such that when the second abutting member moves, a change in the thrust applied to the second feedback member is linearly correlated with a change in the displacement of the second abutting member; When the second detection mechanism is in working state, the rivet body enters the first accommodating space through the opening and abuts against the second abutment member, forcing the second abutment member to move, so as to change the thrust applied by the second transmission medium to the second feedback member, so that the second pressure sensor detects a change in the second pressure value.

4. A blind rivet installation quality inspection device according to claim 3, characterized in that: Also includes: A positioning assembly, controlled movement, the positioning assembly includes a mounting plate, the second detection mechanism is arranged on the mounting plate, and the positioning assembly is configured to align the opening of the detection body with the rivet body of the blind rivet installed on the automotive part when the second detection mechanism is in a working state, and move the opening toward the rivet body until the rivet body is immersed in the first accommodating space.

5. A blind rivet installation quality detection device according to claim 4, characterized in that: The mounting plate comprises a mounting surface, and the mounting surface is perpendicular to the first direction when the second detection mechanism is in a working state; The positioning component also includes: A first telescopic member is arranged at the mounting surface, the first telescopic member includes a first telescopic end, the first telescopic end is controllably telescopic, and the telescopic direction of the first telescopic end is configured to be parallel to the first direction when the second detection mechanism is in a working state, and the first telescopic end is connected to the detection body to drive the detection body to move.

6. A blind rivet installation quality inspection device according to claim 5, characterized in that: The positioning component also includes: A first rack is disposed in the mounting plate, the first rack moves in a controlled manner and is restricted to move in a second direction, and one end of the first rack extends to the outside of the mounting plate; a second rack, arranged in the mounting plate, the second rack being arranged parallel to the first rack, the moving direction of the second rack being limited to be parallel to the moving direction of the first rack, and an end of the second rack facing away from the first rack extending to the outside of the mounting plate; A transmission gear is disposed in the mounting plate, the transmission gear is located between the first rack and the second rack, and the transmission gear is meshed with the first rack and the second rack at the same time; A first clamping member, disposed at one end of the first rack extending to the outside of the mounting plate; A second clamping member is provided at one end of the second rack extending to the outside of the mounting plate; a second telescopic member, disposed at the mounting plate, the second telescopic member comprising a second telescopic end, the second telescopic end being controllably telescopic, and the second telescopic end being connected to the first rack to drive the first rack to move; Wherein, the positioning assembly is configured so that when the second telescopic end moves, the first rack moves synchronously, causing the transmission gear to rotate, thereby causing the second rack to move synchronously with the first rack.

7. A blind rivet installation quality inspection device according to claim 6, characterized in that: The side of the detection body where the opening is formed is configured as a first plane, the first plane is perpendicular to the first direction, and the opening is located at the center of the first plane.

8. A blind rivet installation quality inspection device according to claim 7, characterized in that: The edge of the opening is configured as a curved surface structure extending toward the first accommodating space.

9. A blind rivet installation quality inspection device according to claim 8, characterized in that: The second detection mechanism also includes: A plurality of first conduits, each of which is disposed in the first accommodating space, each of which is disposed in the first conduit in a one-to-one correspondence, the posture of each of which is adapted to the corresponding first detection component, and the first abutment member and the first feedback member in the first conduit facing opposite ends extend from both ends of the first conduit to the first accommodating space respectively; A plurality of second conduits, each of which is arranged in the first accommodating space, each of which is arranged in the second conduit in a one-to-one correspondence, the posture of each of which is adapted to the corresponding second detection component, and the second abutment member and the second feedback member in the second conduit facing opposite ends extend from the two ends of the second conduit to the first accommodating space respectively.

10. A control method for the blind rivet installation quality detection device according to claim 9, characterized in that: include: The mounting plate is moved to a target position inside the automobile part to be inspected by the positioning assembly, so that the opening of the inspection body is aligned with the expanded rivet body inside the automobile part, and the second inspection mechanism and the automobile part to be inspected are in a relatively static state; Controlling the first telescopic end of the first telescopic member to extend so that the opening of the detection body moves toward a direction close to the rivet body; If the rivet body fails to be inserted into the first accommodation space through the opening, it is determined that the rivet assembly quality does not meet the standard; If the rivet body is inserted into the first accommodating space through the opening, the peripheral side and the end of the rivet body facing away from the opening will respectively abut against the first abutment member and the second abutment member, so that the first abutment member and the second abutment member move, causing the first pressure value collected by the first pressure sensor and the second pressure value collected by the second pressure sensor to change; If the first pressure value collected by the first pressure sensor exceeds the allowable deviation range of the first target pressure value and / or the second pressure value collected by the second pressure sensor exceeds the allowable deviation range of the second target pressure value, the rivet installation quality is determined to be unqualified.

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