Fixture for inspecting the surface profile of a workpiece

Abstract

This application relates to the field of testing equipment technology, and discloses a fixture for detecting the surface contour of a workpiece. The surface contour detection fixture includes: a fixed base, comprising: a receiving portion and a guiding portion, wherein the receiving portion is used to place the workpiece to be detected, and the guiding portion extends along the length direction of the workpiece; a movable clamp, movably disposed on the fixed base along the length direction of the workpiece, the movable clamp and the guiding portion engaging; and a detection device disposed on the movable clamp, the detection device being used to detect the surface contour of the workpiece. The surface contour detection fixture of this application, by using the movable clamp to drive the detection device to move along the entire length of the workpiece, can achieve continuous or high-density point detection of decorative strips or other long strip-shaped workpieces, thereby improving the accuracy of surface contour detection.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to a tooling for testing the surface contour of a workpiece. Background Technology

[0002] In the automotive manufacturing industry, the refinement of a vehicle's exterior is a crucial indicator of its overall quality and craftsmanship. As consumers increasingly demand higher quality and detail in vehicle appearance, the assembly precision and matching quality of exterior body parts are receiving growing attention. Among these, decorative trim strips, as common decorative functional components on the exterior surface of a car body, are widely used in areas such as doors, side panels, hoods, and tailgates. They not only enhance the aesthetic appeal of the body lines and improve visual flow, but also serve practical functions such as protecting the paint and concealing assembly gaps.

[0003] The fit between the decorative trim strip and the main structural components such as the door and side panels directly affects the continuity, smoothness, and light and shadow effects of the overall vehicle appearance. Especially in the long side panel areas, the consistency of the trim strip's fit with the body panels must meet strict surface contour tolerance requirements to ensure a uniform, smooth, and distortion-free visual appearance throughout the installation path. Therefore, controlling the surface contour precision of the entire trim strip becomes a key technical aspect in ensuring the quality of the appearance match.

[0004] Currently, the industry commonly uses specialized gauges with fixed detection block structures to detect and control the surface profile of decorative trim strips. These gauges typically place rigid detection blocks at predetermined key cross-sectional locations, and assess whether the profile meets requirements by comparing the deviation between the actual surface of the decorative trim strip and the theoretically designed profile. However, these gauges have significant limitations: due to the fixed structural dimensions and detection points, measurements can only be taken at a limited number of discrete locations, making it impossible to comprehensively detect the continuous surface profile along the entire length of the decorative trim strip; furthermore, due to insufficient detection density, it is difficult to effectively identify defects such as localized minor deformations, gradual distortions, or wavy deviations, resulting in low representativeness and accuracy of the detection results. Utility Model Content

[0005] In view of this, the present application provides a workpiece surface profile detection fixture. By using a movable fixture to drive the detection device to move along the entire length of the workpiece, continuous or high-density point detection of decorative bright strips or other long strip-shaped workpieces can be realized, thereby improving the accuracy of surface profile detection.

[0006] This application provides a workpiece surface profile detection fixture, comprising: a fixed base, including a receiving portion and a guiding portion, wherein the receiving portion is used to place the workpiece to be detected, and the guiding portion extends along the length direction of the workpiece; a movable fixture, movably disposed on the fixed base along the length direction of the workpiece, the movable fixture being guided and engaged with the guiding portion; and a detection device disposed on the movable fixture, the detection device being used to detect the surface profile of the workpiece.

[0007] This utility model discloses a surface contour inspection fixture. In use, the workpiece to be inspected (such as a decorative bright strip or other long strip-shaped exterior part) is placed in the receiving part of a fixed base. The fixed base is provided with a guide part extending along the length of the workpiece. The movable fixture forms a guiding engagement with this guide part. As the movable fixture moves along the guide part, the inspection device simultaneously performs continuous or high-density interval scanning on the workpiece surface, collecting actual surface contour data of the workpiece over its entire length. This achieves continuous or high-density point inspection of decorative bright strips or other long strip-shaped workpieces, overcoming the limitation of traditional fixed fixtures that can only detect discrete points. This improves the spatial coverage and representativeness of the surface contour inspection results, and more realistically and comprehensively reflects the actual contour deviation of the workpiece. Furthermore, it helps to discover subtle defects on the workpiece, such as localized minor deformations, gradual twists, and wavy undulations, which are difficult to capture using traditional methods. This improves the early identification rate of appearance matching quality problems and contributes to improving the consistency of the overall vehicle appearance quality.

[0008] In some embodiments, the fixing base includes: a support member having a mounting groove at its top end; a receiving member disposed in the mounting groove, a receiving portion disposed in the receiving member, the receiving portion being formed as a receiving platform with an open top, the workpiece having a surface to be inspected, the surface to be inspected facing away from the receiving platform when the workpiece is placed on the receiving platform, the receiving member further including a limiting structure, the limiting structure limiting the workpiece when the workpiece is placed on the receiving platform; the limiting structure extending to the upper side of the receiving platform.

[0009] The mounting base adopts a separate structure for the support and the receiving component. By embedding the receiving component into the mounting groove of the support component, the functional modules are separated. The receiving part is formed into a receiving platform with an open top, which facilitates quick loading and unloading of workpieces. At the same time, the receiving component integrates a limiting structure, which can reliably limit the workpiece after it is placed, effectively constraining the workpiece's degree of freedom and avoiding measurement errors caused by clamping deviations. This helps to improve the repeatability and reliability of the test results.

[0010] According to some embodiments of the present invention, the accommodating platform includes a first end and a second end along the width direction of the workpiece, the limiting structure is disposed at the first end, and the second end is open.

[0011] By designing a accommodating platform with a limiting structure at the first end and an open structure at the second end in the width direction, the workpiece can be slid in or pulled out along the length direction from the open side, enabling quick loading and unloading. This structure is particularly suitable for the inspection of long strip-shaped workpieces (such as door trim strips, side trim strips, etc.), avoiding the cumbersome operation of aligning the positioning holes or mating surfaces on both sides required by the traditional fixed structure at both ends, which helps to speed up the inspection process and improve the convenience of the inspection operation.

[0012] According to some embodiments of the present invention, the support member includes: a support body; a first boss and a second boss, the first boss and the second boss being located at the top of the support body and spaced apart along the width direction of the workpiece to jointly define the mounting groove; the receiving member includes a body portion and an extension portion, the body portion being embedded in the mounting groove, the extension portion being supported by the first boss, a portion of the top wall of the body portion and the top wall of the extension portion constituting the receiving platform, the limiting structure being provided at one end of the top wall of the body portion facing the second boss; the second boss constituting the guide portion.

[0013] The mounting groove is defined by the first and second bosses, and the main body is embedded in the mounting groove. This improves the installation stability of the accommodating component, preventing it from loosening, warping, or shifting during use, and ensuring the long-term stability of the flatness and positioning reference of the accommodating platform. Simultaneously, the second boss serves both structural support and guiding functions. It participates in forming the mounting groove to position the accommodating component and also acts as a sliding track for the movable fixture, eliminating the need for additional guide rails. This simplifies the overall structure of the surface profile detection fixture, improves its mechanical rigidity and guiding accuracy, and ensures the straightness and stability of the detection device's movement trajectory.

[0014] According to some embodiments of the present invention, the movable clamp includes: a clamp body and a clamping arm, the clamp body being slidably disposed on the second boss, and the clamping arm extending to the upper side of the receiving platform.

[0015] The clamping arm extends from the main body of the fixture to the upper side of the receiving platform, allowing the detection device to be suspended directly above the workpiece or at the optimal detection position, avoiding mechanical interference with the workpiece, the receiving platform, or the limiting structure, thereby improving the reliability of the detection results.

[0016] According to some embodiments of the present invention, the height of the second protrusion is higher than the height of the limiting structure, the movable clamp further includes a limiting protrusion disposed at the bottom of the clamp body, the clamp body is attached to the top wall of the second protrusion, the limiting protrusion is attached to the side wall of the second protrusion facing the first protrusion, and the limiting protrusion is spaced apart from the limiting structure.

[0017] The fixture body achieves vertical constraint by adhering to the top wall of the second protrusion at its bottom, and achieves lateral guidance and positioning by adhering to its inner side wall through the limiting protrusion. This effectively limits the vertical jump, left and right sway or twist that may occur during the movement of the movable fixture, significantly improves the straightness of the motion trajectory and the repeatability of the positioning, and ensures the reliability of the test data.

[0018] According to some embodiments of the present invention, the surface to be tested includes a first side and a second side adjacent to each other along the circumference of the workpiece, the first side and the second side being arranged at an angle; the clamping arm includes a first segment and a second segment, the first segment being parallel to the first side and the second segment being parallel to the second side, and the detection device being disposed on at least one of the first segment and the second segment.

[0019] The clamping arm is designed as a polygonal structure consisting of a first segment and a second segment, which are parallel to the first and second sides of the workpiece, respectively. This allows the detection device to simultaneously measure multiple surfaces to be inspected on non-planar and bent workpieces in the optimal posture, thus improving the adaptability of the surface profile detection fixture to workpieces with complex cross-sections.

[0020] According to some embodiments of the present invention, both the first segment and the second segment are provided with insertion holes; the detection device is pluggable into any one of the insertion holes.

[0021] Multiple insertion holes are provided on both the first and second sections of the clamping arm. The detection device can be plugged into any insertion hole. Users can flexibly select the installation position and number of sensors according to the specific structure of the workpiece, the key areas to be detected, or the process requirements, so as to achieve the optimal configuration of detection resources.

[0022] According to some embodiments of the present invention, the support member includes: a base fixed to the mounting surface; a support column disposed on one side of the base along its own thickness direction, and a mounting groove disposed at the end of the support column away from the base.

[0023] The base is firmly fixed to the mounting surface, and the support column supports the upper structure vertically upward, forming a clear force transmission path. This helps to improve the overall bending and torsional resistance of the surface contour inspection fixture, effectively suppresses external vibration and operational disturbances, and ensures the stability of the inspection environment.

[0024] According to some embodiments of the present invention, the support member and the receiving member are detachably connected.

[0025] In this way, without replacing the entire tooling, only the receiving parts that are adapted to different workpiece shapes, sizes or cross-sectional features can be replaced to meet the inspection requirements of different vehicle exterior parts, improve production line cycle time and inspection efficiency, and help reduce the development and maintenance costs of inspection tools under multi-variety production. Attached Figure Description

[0026] Figure 1 This is one of the structural schematic diagrams of the surface contour detection fixture according to an embodiment of this utility model;

[0027] Figure 2 This is the second structural schematic diagram of the surface contour detection fixture according to an embodiment of this utility model.

[0028] Figure label:

[0029] 100-Surface contour inspection fixture;

[0030] 110-Fixed base; 111-Accommodating part; 112-Guide part; 113-Supporting member; 1131-Supporting body; 1132-First boss; 1133-Second boss; 1134-Base; 1135-Supporting column; 114-Accommodating member; 1141-Accommodating platform; 1141a-First end; 1141b-Second end; 1142-Limiting structure; 1143-Body part; 1144-Extension part;

[0031] 120 - Movable clamp; 121 - Clamp body; 122 - Clamp arm; 1221 - First section; 1222 - Second section; 1223 - Insertion hole; 123 - Limiting protrusion;

[0032] 130 - Detection device;

[0033] 200 - Workpiece; 210 - Surface to be inspected; 211 - First side surface; 212 - Second side surface. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0035] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0036] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0037] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium.

[0038] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0039] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0040] In existing technologies, the matching status between decorative trim strips and main structural components such as door and side panel sheet metal directly affects the continuity, flatness, and light and shadow effects of the overall vehicle appearance. Especially in the long-extended side panel area, the consistency of the decorative trim strip's fit with the body sheet metal must meet strict surface contour tolerance requirements to ensure a uniform, smooth, and distortion-free visual presentation throughout the entire installation path. Therefore, controlling the surface contour precision of the entire decorative trim strip becomes a key technical aspect in ensuring the quality of the appearance matching.

[0041] Among them, surface profile is an indicator that limits the variation of the actual curved surface with the ideal curved surface. It is a requirement for the shape accuracy of the curved surface. In other words, surface profile measures the "fit" between an actual curved surface and the ideal designed curved surface, ensuring that the workpiece surface meets the design requirements in terms of overall shape.

[0042] Currently, the industry commonly uses specialized gauges with fixed detection block structures to detect and control the surface profile of decorative trim strips. These gauges typically place rigid detection blocks at predetermined key cross-sectional locations, and assess whether the profile meets requirements by comparing the deviation between the actual surface of the decorative trim strip and the theoretically designed profile. However, these gauges have significant limitations: due to the fixed structural dimensions and detection points, measurements can only be taken at a limited number of discrete locations, making it impossible to comprehensively detect the continuous surface profile along the entire length of the decorative trim strip; furthermore, due to insufficient detection density, it is difficult to effectively identify defects such as localized minor deformations, gradual distortions, or wavy deviations, resulting in low representativeness and accuracy of the detection results.

[0043] In view of this, the present application provides a workpiece surface profile detection fixture. By using a movable fixture to drive the detection device to move along the entire length of the workpiece, continuous or high-density point detection of decorative bright strips or other long strip-shaped workpieces can be realized, thereby improving the accuracy of surface profile detection.

[0044] refer to Figure 1 and Figure 2 This application provides a surface profile detection fixture 100 for detecting the surface profile of a workpiece 200, which is used to detect the surface profile of a vehicle's decorative bright strip or other long strip-shaped workpiece 200.

[0045] refer to Figure 1 The surface contour detection fixture 100 in this embodiment may include a fixed base 110, a movable clamp 120, and a detection device 130.

[0046] The mounting base 110 includes a receiving portion 111 and a guide portion 112. The receiving portion 111 is used to place the workpiece 200 to be inspected. Exemplarily, the receiving portion 111 can be formed as a receiving structure such as a groove or cavity, or a horizontal placement plane, to place the workpiece 200 to be inspected. The guide portion 112 extends along the length direction of the workpiece 200, providing a reliable guiding effect.

[0047] The movable fixture 120 is movably mounted on the fixed base 110 along the length of the workpiece 200. The movable fixture 120 is guided and engaged with the guide portion 112. For example, the guide portion 112 can be a guide rail extending along the length of the workpiece 200. The movable fixture 120 is provided with a mating groove that mates with the guide rail. Through the sliding engagement between the guide rail and the mating groove, the movable fixture 120 reciprocates along the guide portion 112, thereby enabling the detection device 130 on the movable fixture 120 to continuously detect the surface profile of the workpiece 200, improving detection accuracy. Alternatively, the guide portion 112 can also be a lead screw extending along the length of the workpiece 200. The movable fixture 120 is threadedly engaged with the lead screw, so that the movable fixture 120 reciprocates along the guide portion 112, thereby enabling the detection device 130 on the movable fixture 120 to continuously detect the surface profile of the workpiece 200, improving detection accuracy.

[0048] The detection device 130 is installed on the movable fixture 120 and is used to detect the surface profile of the workpiece 200.

[0049] The surface contour detection fixture 100 of this utility model, in use, places the workpiece 200 to be inspected (such as a decorative bright strip or other long strip-shaped exterior part) in the receiving part 111 of the fixed base 110. The fixed base 110 is provided with a guide part 112 extending along the length direction of the workpiece 200. The movable fixture 120 forms a guiding engagement with the guide part 112. As the movable fixture 120 moves along the guide part 112, the detection device 130 simultaneously performs continuous or high-density interval scanning on the surface of the workpiece 200, collecting the actual surface contour data of the workpiece 200 over its entire length. This realizes continuous or high-density point detection of decorative bright strips or other long strip-shaped workpieces 200, overcoming the defect of traditional fixed fixtures that can only detect discrete points. It is beneficial to improve the spatial coverage and representativeness of the surface contour detection results, and can more realistically and comprehensively reflect the actual contour deviation of the workpiece 200. This helps to discover subtle defects on the workpiece 200 that are difficult to capture by traditional methods, such as localized minor deformations, gradual twists, and wavy undulations. It improves the early identification rate of appearance matching quality problems and helps to improve the consistency of the overall vehicle appearance quality.

[0050] In some possible embodiments, the movable clamp 120 is driven by a drive device. When the guide portion 112 is formed as a guide rail, the drive device can be a telescopic cylinder or a drive motor connected to a ball screw to drive the movable clamp 120 to reciprocate. Alternatively, when the guide portion 112 is formed as a lead screw, the lead screw can be driven by a drive motor to drive the movable clamp 120 to reciprocate. In this case, a limit device (such as a limit block) is provided on the fixed base 110 to prevent the movable clamp 120 from flipping.

[0051] In some possible embodiments, the detection device 130 may include contact detection equipment, such as a profilometer, dial indicator, or micrometer, etc. Alternatively, the detection device 130 may also include non-contact detection equipment, such as a laser displacement sensor, a structured light 3D scanner, a capacitive sensor, and an inductive sensor, etc.

[0052] In some embodiments, the fixing base 110 includes a support member 113 and a receiving member 114. The top end of the support member 113 is provided with a mounting groove; the receiving member 114 is disposed in the mounting groove, and the receiving portion 111 is disposed in the receiving member 114. The fixing base 110 adopts a separate structure for the support member 113 and the receiving member 114. By embedding the receiving member 114 into the mounting groove of the support member 113, the functional modules are separated. Workpieces 200 of different models or cross-sectional shapes can be adapted by replacing the matching receiving member 114 without replacing the entire fixing base 110. This is beneficial to improving the versatility and maintainability of the surface contour inspection fixture 100 and reducing the cost of inspection tools in multi-variety production.

[0053] The receiving portion 111 is formed as a receiving platform 1141 with an open top, which facilitates the quick loading and unloading of the workpiece 200. The workpiece 200 has a surface to be inspected 210. When the workpiece 200 is placed on the receiving platform 1141, the surface to be inspected 210 faces away from the receiving platform 1141, providing the inspection device 130 with an unobstructed measurement field of view and sufficient installation space, avoiding obstruction or interference, and facilitating the acquisition of accurate contour data.

[0054] The receiving component 114 also includes a limiting structure 1142. When the workpiece 200 is placed on the receiving platform 1141, the limiting structure 1142 limits the workpiece 200. The limiting structure 1142 extends to the upper side of the receiving platform 1141. The limiting structure 1142 integrated on the receiving component 114 can reliably limit the workpiece 200 after it is placed, effectively constraining the degree of freedom of the workpiece 200 in the non-detection direction, avoiding measurement errors caused by clamping deviations, and improving the repeatability and reliability of the detection results.

[0055] In some possible embodiments, combined Figure 1 and Figure 2 The limiting structure 1142 may include a lateral stop, a positioning pin, and an elastic pressure block that presses the edge of the workpiece 200, etc., disposed on one side of the workpiece 200.

[0056] According to some embodiments of this utility model, the receiving platform 1141 includes a first end 1141a and a second end 1141b along the width direction of the workpiece 200. A limiting structure 1142 is provided at the first end 1141a, and the second end 1141b is open. By setting the first end 1141a with the limiting structure 1142 and the second end 1141b open in the width direction, the workpiece 200 can slide in or out from the open side along the length direction, realizing quick loading and unloading. This structure is particularly suitable for the inspection of long strip workpieces 200 (such as door decorative bright strips, side trim strips, etc.), avoiding the cumbersome operation of aligning the positioning holes or mating surfaces on both sides of the traditional two-end fixed structure, which is conducive to speeding up the inspection process and improving the convenience of the inspection operation.

[0057] Furthermore, the open design of the second end 1141b allows the surface profile inspection fixture 100 to be compatible with inspecting workpieces 200 of various lengths. By simply replacing the matching receiving part 114 and adjusting the travel of the movable fixture 120, inspection of different models of products can be achieved without designing a fully enclosed limiting structure 1142 separately for each length, thus enhancing the versatility and flexible production capabilities of the surface profile inspection fixture 100.

[0058] According to some embodiments of this utility model, the support member 113 includes a support body 1131, a first boss 1132, and a second boss 1133. The first boss 1132 and the second boss 1133 are located at the top of the support body 1131 and are spaced apart along the width direction of the workpiece 200 to jointly define the mounting groove. By defining the mounting groove through the first boss 1132 and the second boss 1133, the receiving member 114 is embedded in the mounting groove, which helps to improve the installation stability of the receiving member 114, avoids the receiving member 114 from loosening, warping, or shifting during use, and ensures the long-term stability of the flatness and positioning reference of the receiving platform 1141.

[0059] The receiving member 114 includes a body portion 1143 and an extension portion 1144. The body portion 1143 is embedded in the mounting groove, and the extension portion 1144 is supported by the first boss 1132. A portion of the top wall of the body portion 1143 and the top wall of the extension portion 1144 form a receiving platform 1141. A limiting structure 1142 is provided at one end of the top wall of the body portion 1143 facing the second boss 1133, thus axially positioning the workpiece 200 on the side near the second boss 1133; while the other side away from the limiting end (corresponding to the side of the first boss 1132) remains open. Before the inspection begins, the workpiece 200 slides in along the length direction from the side of the first boss 1132, realizing a fast and smooth clamping operation and improving inspection efficiency.

[0060] The second boss 1133 forms the guide part 112, so that the second boss 1133 has both structural support and guiding functions. It not only participates in the formation of the mounting groove to position the receiving part 114, but also serves as the sliding track of the movable clamp 120. This avoids the need for additional guide rails, which helps to simplify the overall structure of the surface profile detection fixture 100, improves the mechanical rigidity and guiding accuracy of the surface profile detection fixture 100, and ensures the linearity and stability of the movement trajectory of the detection device 130.

[0061] According to some embodiments of the present invention, the movable fixture 120 includes a fixture body 121 and a clamping arm 122. The fixture body 121 is slidably disposed on the second boss 1133, and the clamping arm 122 extends to the upper side of the receiving platform 1141. The clamping arm 122 extends from the fixture body 121 to the upper side of the receiving platform 1141, so that the detection device 130 can be suspended directly above the workpiece 200 or at the optimal detection position, avoiding mechanical interference with the workpiece 200, the receiving platform 1141, or the limiting structure 1142, thereby improving the reliability of the detection results.

[0062] In some possible embodiments, a guide groove may be provided on the side of the clamp body 121 facing the second boss 1133. The second boss 1133 is disposed in the guide groove, and the guide groove and the second boss 1133 are slidably engaged, so that the clamp body 121 is slidably mounted on the second boss 1133. The clamp body 121 and the longer second boss 1133 form a stable sliding pair. Combined with the reasonable mechanical design of the clamp arm 122 (such as a low center of gravity arrangement), the vibration or sway caused by the cantilever effect during the movement of the detection device 130 is effectively suppressed, ensuring a straight scanning trajectory and improving data repeatability.

[0063] According to some embodiments of the present invention, the height of the second protrusion 1133 is higher than the height of the limiting structure 1142, ensuring that the movable clamp 120 and the detection device 130 it carries will not spatially interfere with the limiting structure 1142 when moving along the length direction.

[0064] The movable fixture 120 also includes a limiting protrusion 123 located at the bottom of the fixture body 121. The fixture body 121 is attached to the top wall of the second protrusion 1133, and the limiting protrusion 123 is attached to the side wall of the second protrusion 1133 facing the first protrusion 1132. The limiting protrusion 123 is spaced apart from the limiting structure 1142. The fixture body 121 achieves vertical constraint by attaching its bottom to the top wall of the second protrusion 1133, and achieves lateral guidance and positioning by attaching the limiting protrusion 123 to its inner side wall. This effectively limits the vertical jump, lateral sway, or torsion that the movable fixture 120 may experience during movement, significantly improving the straightness of the motion trajectory and the repeatability of the positioning, and ensuring the reliability of the test data.

[0065] According to some embodiments of the present invention, the surface to be tested 210 includes a first side surface 211 and a second side surface 212 that are adjacent to each other along the circumference of the workpiece 200. The first side surface 211 and the second side surface 212 are set at an angle. That is, the workpiece 200 to be tested may have multiple contour surfaces that are set at an angle to each other.

[0066] The clamping arm 122 includes a first segment 1221 and a second segment 1222. The first segment 1221 is parallel to the first side surface 211, and the second segment 1222 is parallel to the second side surface 212. It adapts to the surface structure of the workpiece 200, so that the surface profile detection fixture 100 can detect workpieces 200 with multiple surfaces, thereby improving the adaptability of the surface profile detection fixture 100.

[0067] The detection device 130 is disposed on at least one of the first segment 1221 and the second segment 1222. For example, the detection device 130 may be disposed on the first segment 1221, or the detection device 130 may also be disposed on the second segment 1222, or the detection device 130 may be disposed on both the first segment 1221 and the second segment 1222, so as to detect multiple surfaces of the workpiece 200.

[0068] Thus, the clamping arm 122 is designed as a polygonal structure including the first segment 1221 and the second segment 1222, which are parallel to the first side 211 and the second side 212 of the workpiece 200, respectively. This allows the detection device 130 to simultaneously measure multiple surfaces 210 of the non-planar, bent workpiece 200 in the optimal posture, thereby improving the adaptability of the surface profile detection fixture 100 to the detection of workpieces 200 with complex cross sections.

[0069] In some possible embodiments, the first segment 1221 and the second segment 1222 can be an adjustable design, such as the first segment 1221 and the second segment 1222 being engaged by gears, with the first segment 1221 and the second segment 1222 rotating relative to each other to accommodate workpieces 200 with different included angles between the first side 211 and the second side 212.

[0070] According to some embodiments of this utility model, both the first segment 1221 and the second segment 1222 are provided with insertion holes 1223; the detection device 130 is pluggably disposed in any one of the insertion holes 1223. Multiple insertion holes 1223 are provided on both the first segment 1221 and the second segment 1222 of the clamping arm 122, and the detection device 130 can be pluggably installed in any one of the insertion holes 1223. Users can flexibly select the installation position and number of sensors according to the specific structure of the workpiece 200, the key detection area, or process requirements, thereby achieving optimal configuration of detection resources.

[0071] In some possible embodiments, a fixing device may be provided in the socket 1223 to fix the detection device 130 to ensure the stability of the detection device 130 during the detection process. For example, the fixing device may be an elastic telescopic block that extends and retracts radially along the socket 1223 to clamp and fix the detection device 130. At the same time, it is also convenient to disassemble and replace the detection device 130.

[0072] According to some embodiments of this utility model, the support member 113 includes a base 1134 and a support column 1135, with the base 1134 fixed to the mounting surface. The support column 1135 is located on one side of the base 1134 along its own thickness direction, and the mounting groove is located at the end of the support column 1135 away from the base 1134. The base 1134 is firmly fixed to the mounting surface, and the support column 1135 vertically upwards supports the upper structure, forming a clear force transmission path. This is beneficial for improving the overall bending and torsional resistance of the surface contour detection fixture, effectively suppressing external vibration and operational disturbances, and ensuring the stability of the detection environment. The mounting groove is located at the end of the support column 1135 away from the base 1134, so that the accommodating platform 1141, the guide part 112, and the movable clamp 120 are all located at a higher position, making it convenient for operators to observe the clamping status of the workpiece 200 and the detection process. At the same time, it also reserves sufficient space for wiring, cleaning, or automated conveying equipment below, improving ergonomics and production line integration adaptability.

[0073] According to some embodiments of this utility model, the support member 113 and the receiving member 114 are detachably connected. For example, the support member 113 can be elastically engaged with the receiving member 114 for easy assembly and disassembly. Alternatively, one of the mounting groove of the support member 113 and the body portion 1143 of the receiving member 114 may have a groove, while the other may have a boss. The boss slides into the groove, allowing for a detachable connection between the support member 113 and the receiving member 114. Alternatively, the receiving member 114 may have a mounting hole extending along its height, and the mounting groove of the support member 113 may have a positioning hole corresponding to the mounting hole. Screws, bolts, and other fasteners pass through the mounting hole and the positioning hole, allowing for a detachable connection between the support member 113 and the receiving member 114. Thus, without replacing the entire tooling, only the receiving member 114 adapted to the shape, size, or cross-sectional characteristics of different workpieces 200 can be replaced to meet the inspection requirements of exterior parts for different vehicle models, improving production line cycle time and inspection efficiency, and reducing the development and maintenance costs of inspection tools in multi-variety production.

[0074] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A surface profile inspection fixture (100) for a workpiece (200), characterized in that, include: The mounting base (110) includes a receiving portion (111) and a guide portion (112), wherein the receiving portion (111) is used to place the workpiece (200) to be inspected, and the guide portion (112) extends along the length direction of the workpiece (200); A movable clamp (120) is movably disposed on the fixed base (110) along the length direction of the workpiece (200), and the movable clamp (120) is guided and engaged with the guide part (112); A detection device (130) is provided on the movable fixture (120), and the detection device (130) is used to detect the surface profile of the workpiece (200).

2. The surface profile detection fixture (100) for the workpiece (200) according to claim 1, characterized in that, The fixing base (110) includes: A support member (113) is provided with a mounting groove at its top end; The accommodating member (114) is disposed in the mounting groove, and the accommodating part (111) is disposed in the accommodating member (114). The accommodating part (111) is formed as an open-top accommodating platform (1141). The workpiece (200) has a surface to be inspected (210). When the workpiece (200) is disposed on the accommodating platform (1141), the surface to be inspected (210) faces away from the accommodating platform (1141). The accommodating member (114) also includes a limiting structure (1142). When the workpiece (200) is disposed on the accommodating platform (1141), the limiting structure (1142) limits the workpiece (200). The limiting structure (1142) extends to the upper side of the accommodating platform (1141).

3. The surface profile detection fixture (100) for the workpiece (200) according to claim 2, characterized in that, The accommodating platform (1141) includes a first end (1141a) and a second end (1141b) along the width direction of the workpiece (200), the limiting structure (1142) is disposed at the first end (1141a), and the second end (1141b) is open.

4. The surface profile detection fixture (100) for a workpiece (200) according to claim 2, characterized in that, The support member (113) includes: Supporting main body (1131); The first boss (1132) and the second boss (1133) are located at the top of the support body (1131) and are spaced apart along the width direction of the workpiece (200) to jointly define the mounting groove. The receiving member (114) includes a body part (1143) and an extension part (1144). The body part (1143) is embedded in the mounting groove, and the extension part (1144) is supported on the first boss (1132). A portion of the top wall of the body part (1143) and the top wall of the extension part (1144) constitute the receiving platform (1141). The limiting structure (1142) is provided at one end of the top wall of the body part (1143) facing the second boss (1133). The second boss (1133) constitutes the guide portion (112).

5. The surface profile detection fixture (100) for the workpiece (200) according to claim 4, characterized in that, The movable clamp (120) includes a clamp body (121) and a clamp arm (122). The clamp body (121) is slidably disposed on the second boss (1133), and the clamp arm (122) extends to the upper side of the receiving platform (1141).

6. The surface profile detection fixture (100) for a workpiece (200) according to claim 5, characterized in that, The height of the second boss (1133) is higher than the height of the limiting structure (1142). The movable clamp (120) also includes a limiting protrusion (123) located at the bottom of the clamp body (121). The clamp body (121) is attached to the top wall of the second boss (1133), the limiting protrusion (123) is attached to the side wall of the second boss (1133) facing the first boss (1132), and the limiting protrusion (123) is spaced apart from the limiting structure (1142).

7. The surface profile detection fixture (100) for a workpiece (200) according to claim 5, characterized in that, The surface to be inspected (210) includes a first side surface (211) and a second side surface (212) that are circumferentially adjacent to the workpiece (200), and the first side surface (211) and the second side surface (212) are arranged at an angle. The clamping arm (122) includes a first segment (1221) and a second segment (1222), the first segment (1221) being parallel to the first side (211), the second segment (1222) being parallel to the second side (212), and the detection device (130) being disposed on at least one of the first segment (1221) and the second segment (1222).

8. The surface profile detection fixture (100) for a workpiece (200) according to claim 7, characterized in that, Both the first segment (1221) and the second segment (1222) are provided with insertion holes (1223); The detection device (130) is pluggable into any of the sockets (1223).

9. The surface profile detection fixture (100) for a workpiece (200) according to claim 2, characterized in that, The support member (113) includes: The base (1134) is fixed to the mounting surface; A support column (1135) is provided on one side of the base (1134) along its own thickness direction, and the mounting groove is provided at the end of the support column (1135) away from the base (1134).

10. The surface profile detection fixture (100) for a workpiece (200) according to claim 2, characterized in that, The support member (113) and the receiving member (114) are detachably connected.

Images