Composite testing fixture

Abstract

The invention relates to a composite testing fixture which comprises an assembly table, a profile tolerance measuring module, a clamping and positioning module and a flush measuring module, the clamping and positioning module is installed on the assembly table and used for clamping and fixing a to-be-measured workpiece, the profile tolerance measuring module comprises three reference circles, a measuring head and a control system, the three reference circles are installed on the assembly table respectively, and the measuring head is installed on the assembly table. The measuring head is connected with the clamping and positioning module and arranged around the clamping and positioning module so as to establish a coordinate system for the workpiece to be measured, the measuring head can detect multiple feature points of the corresponding surface of the workpiece to be measured, the control system can read three-dimensional coordinate data of the feature points in the coordinate system, and the control system can calculate the profile tolerance of the corresponding surface of the workpiece to be measured according to the multiple feature points. And the flush measurement module is mounted on the assembly table and is used for measuring the flatness of the corresponding plane of the workpiece to be measured. According to the composite testing fixture provided by the invention, the problem that the detection efficiency of the existing testing fixture for the S-shaped structural plate is relatively low is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing fixtures for parts, and in particular to a composite testing fixture. BACKGROUND

[0002] The S-shaped structure plate of the battery pack is mainly used for installing battery structures such as cylindrical battery cells, and as the requirements for the energy density and safety of the battery pack of the electric vehicle are increasing, the risk of battery pack sealing failure caused by deformation and welding offset of the S-shaped structure plate is paid more and more attention, and therefore it is necessary to detect and evaluate the dimensional accuracy, assembly adaptability and structural strength of the S-shaped structure plate to check whether the S-shaped structure plate is qualified.

[0003] At present, the detection of the S-shaped structure plate is usually carried out in a flow line, for example, the coordinate measurement and precision detection of the S-shaped structure plate are carried out separately, which not only wastes a lot of time for operation, but also makes the manufacturing cost of the testing fixture very high. SUMMARY

[0004] Therefore, it is necessary to provide a composite testing fixture to solve the problem of low detection efficiency of the existing testing fixture for the S-shaped structure plate.

[0005] The composite testing fixture provided by the present application comprises an assembly table, a profile measurement module, a clamping and positioning module and a flush measurement module. The clamping and positioning module is installed on the assembly table to clamp and fix the workpiece to be tested. The profile measurement module comprises three reference circles, a probe and a control system. The three reference circles are installed on the assembly table and arranged around the clamping and positioning module to establish a coordinate system for the workpiece to be tested. The probe can detect a plurality of feature points on the surface of the workpiece to be tested, and the control system can read the three-dimensional coordinate data of the feature points in the coordinate system. The control system can calculate the profile of the surface of the workpiece to be tested according to the plurality of feature points. The flush measurement module is installed on the assembly table, and the flush measurement module is used to measure the flatness of the corresponding plane of the workpiece to be tested.

[0006] In one embodiment, the flush measurement module comprises a reference detection table and a flush gauge. The reference detection table is fixedly installed on the assembly table, and the workpiece to be tested is installed on the table surface of the reference detection table. The side of the reference detection table is provided with a reference surface. The flush gauge comprises a gauge body and a blade. The gauge body is provided with a reference measurement surface which can be attached to the reference surface and moved. The blade is aligned with the side end surface of the workpiece to be tested. When the gauge body moves along the extension direction of the reference surface, the blade can detect the distance between the side end surface of the workpiece to be tested to measure the flatness of the side end surface of the workpiece to be tested.

[0007] In one embodiment, the reference detection table is in the shape of a cuboid, and one side of the reference detection table serves as the reference surface.

[0008] In one of the embodiments, the clamping and positioning module comprises two adjusting and positioning parts oppositely arranged along the length direction of the workpiece to be measured, and the two adjusting and positioning parts abut against two ends of the workpiece to be measured respectively to limit the movement of the workpiece to be measured along the horizontal plane.

[0009] In one of the embodiments, the adjusting and positioning part comprises a fixed table, a push rod and a movable bolt, the fixed table is fixedly installed on the assembly table, the fixed table is provided with a movable cavity, one end of the push rod is inserted into the movable cavity and movably cooperates with the movable cavity along the length direction of the workpiece to be measured, the other end of the push rod abuts against the workpiece to be measured, the push rod is provided with a plurality of positioning holes spaced apart along the length direction of the workpiece to be measured, and the movable bolt can be sequentially inserted into the inner wall of the movable cavity and the corresponding positioning hole to adjust the length of the push rod extending out of the movable cavity towards the workpiece to be measured.

[0010] In one of the embodiments, the movable bolt comprises a shank and a head, the movable bolt is sequentially inserted into the inner wall of the movable cavity and the corresponding positioning hole through the shank, and the head is detachably connected to one end of the shank away from the fixed table.

[0011] In one of the embodiments, the movable bolt further comprises a push plate, a spring and a limiting plate, the limiting plate is fixedly arranged on the outer circumferential side of the shank, the push plate is movably sleeved on the outer circumferential side of the shank, the push plate is arranged on one side of the limiting plate close to the head, one end of the spring abuts against the push plate, and the other end of the spring abuts against the limiting plate, and the spring can exert a force on the head towards the direction away from the workpiece to be measured through the push plate.

[0012] In one of the embodiments, the head is provided with a light hole section and a threaded hole section sequentially distributed along the direction from the limiting plate to the push plate, and the shank is provided with a threaded connector, when the head compresses the spring through the push plate, the threaded connector can pass through the light hole section and tightly cooperate with the threaded hole section.

[0013] In one of the embodiments, the spring is in a tower shape, and along the direction from the limiting plate to the push plate, the diameter of the spring shows a trend of increasing.

[0014] In one of the embodiments, the clamping and positioning module further comprises a plurality of pressing parts, the plurality of pressing parts are uniformly distributed and installed on both sides of the workpiece to be measured along the width direction of the workpiece to be measured, one end of the pressing part is connected to the assembly table, and the other end can be pressed against one side end face of the workpiece to be measured away from the assembly table.

[0015] Compared with the prior art, the composite gauge provided by the application integrates multiple detection modules through the assembly table, so that the contour and flatness of the workpiece to be detected are detected in one clamping, and the cumulative error caused by repeated positioning is eliminated. In addition, the same coordinate system established by the reference circle can directly serve the contour calculation and flatness evaluation, avoiding data conversion error between multiple devices. Therefore, through the above technical scheme, the application realizes the synchronization operation of the S-shaped structure plate multi-parameter detection, reduces the clamping times of the workpiece to be detected and the equipment switching time. The detection data is directly processed in the same coordinate system, improving the consistency of the measurement results. The modular design reduces the complexity of the gauge development, is suitable for rapid adaptive detection of workpieces of different sizes, and greatly improves the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 A three-dimensional structure schematic diagram of the composite gauge of an embodiment provided by the present application is shown in the figure.

[0018] Figure 2 A top view of the composite gauge of an embodiment provided by the present application is shown in the figure.

[0019] Figure 3 A partial sectional view of the S-S shown in the figure. Figure 2

[0020] Figure 4 A partial structure schematic diagram of the composite gauge of an embodiment provided by the present application is shown in the figure.

[0021] Figure 5 A partial structure exploded view of the composite gauge of an embodiment provided by the present application is shown in the figure.

[0022] Figure 6 A structure schematic diagram of the flush gauge of an embodiment provided by the present application is shown in the figure. Figure 1

[0023] Figure 7 A structure schematic diagram of the flush gauge of an embodiment provided by the present application is shown in the figure. Figure 2

[0024] ​​​100, assembly table; 200, workpiece to be measured; 210, S-shaped structure plate; 211, assembly groove; 300, profile measurement module; 310, first reference circle; 320, second reference circle; 330, third reference circle; 400, flush measurement module; 410, reference detection table; 411, reference surface; 420, flush ruler; 421, ruler body; 4211, reference measurement surface; 422, knife edge; 500, clamping positioning module; 510, adjusting positioning part; 511, fixed table; 5111, movable cavity; 512, push rod; 5121, positioning hole; 513, movable bolt; 5131, insertion rod; 5132, rod head; 5133, push plate; 5134, spring; 5135, limiting plate; 5136, light hole section; 5137, threaded hole section; 5138, threaded connector; 520, pressing part; 521, handle; 522, connecting arm; 523, pressing arm; 524, support seat. DETAILED DESCRIPTION

[0025] Please refer to Figures 1-7 The composite gauge provided by the present application comprises an assembly table 100, a profile measurement module 300, a clamping positioning module 500 and a flush measurement module 400. The clamping positioning module 500 is installed in the middle region of the assembly table 100, and is used for clamping and fixing workpieces to be measured 200 of different sizes. The profile measurement module 300 comprises three reference circles, a probe (not shown in the figure) and a control system (not shown in the figure). The three reference circles are installed on the assembly table 100, and are arranged around the clamping positioning module 500, so as to constitute a spatial coordinate system for the workpiece to be measured 200. The probe can detect a plurality of feature points of a corresponding surface (in the present application, the profile of the assembly groove 211 of the S-shaped structure plate 210 is mainly measured) of the workpiece to be measured 200, and the control system reads three-dimensional coordinate data of the feature points in the coordinate system. In addition, the control system can calculate the profile of the corresponding surface of the workpiece to be measured 200 according to the plurality of feature points. The flush measurement module 400 is installed on the assembly table 100, and is used for measuring the flatness of a corresponding plane of the workpiece to be measured 200.

[0026] The assembly table 100 refers to a basic platform carrying various functional modules, which can be implemented by a metal frame welding structure. The surface of the assembly table 100 is provided with mounting holes for fixing the clamping positioning module 500 and the reference circle, so as to ensure the relative position accuracy among the modules. The reference circle in the profile measurement module 300 refers to a reference element for coordinate system calibration, which can be implemented by a high-precision ceramic disc. Three reference circles are distributed in a triangular shape to establish a three-dimensional space reference, so as to eliminate single-point reference error. The probe refers to a detection device for collecting surface coordinate data of the workpiece 200 to be measured, which can be implemented by a contact probe or a laser displacement sensor. The surface topography data is obtained by multi-point scanning. The clamping positioning module 500 refers to a fixing mechanism for limiting the displacement of the workpiece 200 to be measured, which can be implemented by a bidirectional adjusting mechanical clamp. The position stability of the workpiece 200 to be measured during the detection process is maintained by synchronous pressure on both ends. The flush measurement module 400 refers to a detection assembly for evaluating flatness, which can be implemented by a flush gauge 420 with a reference surface 411. The flatness error is judged by comparing the offset between the end surface of the workpiece 200 to be measured and the reference surface 411.

[0027] It should be noted that the profile measurement module 300 mainly utilizes the three coordinate positioning method to measure the coordinates of the specific point of the workpiece 200 (including but not limited to the battery pack S-shaped structure plate 210, the partition plate and a plurality of parts). Specifically, the profile measurement module 300 includes the following main steps: first, establishing a coordinate system, the profile measurement module 300 defines three mutually perpendicular linear motion axes (X axis, Y axis, Z axis), each motion axis is provided with a high-precision displacement sensor (such as a grating ruler, a laser interferometer), which can accurately measure the distance of the probe moving along the axis, and the intersection point (or a defined point) of the three motion axes constitutes the coordinate system origin of the profile measurement module 300; second, detecting the target point, the operator or the predetermined program controls the motion system of the profile measurement module 300, moves the probe head installed at the end of the Z axis to the surface of the workpiece 200, and the probe head detects the feature points (such as the center of the hole, the center of the ball, the point on the plane, the point on the curved surface, etc., which are mainly detected in this application) on the surface of the workpiece 200 in a specific way (such as trigger contact, scanning continuous contact, non-contact optical scanning), and when the probe head detects the target point, it will send a trigger signal. Third, coordinate reading and calculation, when the probe head trigger signal is sent, the control system of the profile measurement module 300 will instantaneously read the values of the three displacement sensors at this time, and the three values represent the accurate three-dimensional coordinates of the center of the probe head (or the equivalent detection point) in the current coordinate system; fourth, data processing (for features that need to be calculated): for a single point, the reading (X1, Y1, Z1) is the coordinate of the point, for features that need to be calculated (such as the center of the circle, the center of the ball, the intersection of two planes, the axis of the cylinder, etc., and the cross-sectional profile of the assembly groove 211 in this application), the profile measurement module 300 will detect a plurality of related positions on the surface of the workpiece 200 to obtain a set of point coordinates, and then the measurement software uses powerful mathematical algorithms (such as least square method fitting) to process these point sets, accurately calculates the geometric features (size, shape, position, profile, etc.) and their positions in the coordinate system, and in this application, the measurement software can also perform coordinate system conversion (align the measurement coordinate system to the design coordinate system of the workpiece 200), and further generate the tolerance comparison of the workpiece 200 and generate the report data, in this application, the cross-sectional profile of the assembly groove 211 measured by the measurement software is compared with the standard profile data, and then the profile of the cross-sectional profile of the assembly groove 211 and the standard profile is obtained.

[0028] It should be noted that in the measurement of the profile measurement module 300, the three reference circles of the profile measurement module 300 (usually precisely machined holes, bosses or marks on the fixture, and the application mainly adopts the form of bosses) play a core role in establishing the coordinate system of the workpiece 200 to be measured. Their role and principle are based on the rigid body positioning principle in geometry (three-point plane, two-point line, one-point origin), which is the basis for ensuring the accuracy, repeatability and alignment of the measurement results with the design intent.

[0029] The following is a detailed explanation of their functions and principles. The core functions of the three reference circles include the following aspects. First, the origin of the coordinate system of the measured workpiece 200 is defined. The center point of one of the reference circles (usually the main reference) is designated as the origin of the coordinate system of the measured workpiece 200, and this reference circle is defined as the first reference circle 310. The coordinates of all subsequent measured points are calculated relative to this origin. Second, the axial direction of the coordinate system of the measured workpiece 200 is defined. The center line of the two reference circles (defined as the first reference circle 310 and the second reference circle 320) defines an axial direction (usually the X-axis or the Z-axis) of the coordinate system of the measured workpiece 200. The third reference circle (defined as the third reference circle 330) together with the first two reference circles defines the plane (usually the XY plane) of the coordinate system, and thus determines the other axial direction (usually the Z-axis) perpendicular to the plane. Through the mutual relationship of the three circles, the directions of the three axes (X-axis, Y-axis, Z-axis) of the coordinate system can be uniquely determined. Third, the six degrees of freedom of the measured workpiece 200 are constrained. A rigid body has six degrees of freedom in space, including translation along the X-axis, Y-axis, and Z-axis, and rotation around the X-axis, Y-axis, and Z-axis. The centers of the three reference circles theoretically define the reference plane (usually the first reference plane 411) of the measured workpiece 200, which constrains the rotational degrees of freedom around the X-axis and Y-axis, as well as the translational degree of freedom along the Z-axis (assuming the Z-axis is perpendicular to the plane). The center line of the two reference circles defines the main reference axis (usually the X-axis), which constrains the rotational degrees of freedom around the Z-axis and Y-axis (depending on the direction of the axis), as well as the translational degrees of freedom along the Y-axis and Z-axis (which one is constrained depends on which two points). The center of the last reference circle defines the origin of the coordinate system, which constrains the translational degrees of freedom along the X-axis and Y-axis (if the origin is on the main reference axis, it may only constrain one translational degree of freedom). In summary, the precise positions and mutual relationships of the three reference circles can theoretically completely constrain all six degrees of freedom of the measured workpiece 200, uniquely determining its position and attitude in space. Fourth, the precise alignment of the measurement results with the CAD model is achieved. The CAD model also defines a reference system (usually also based on three reference features) during design. In the measurement software, by accurately measuring the three reference circles on the measured workpiece 200, the software can calculate the conversion relationship (translation + rotation) between the actual coordinate system of the measured workpiece 200 and the coordinate system of the CAD model. Once this conversion relationship is established, all subsequent actual point coordinates can be automatically converted to the coordinate system of the CAD model for comparison, thereby accurately evaluating the size and geometric tolerance. The measurement results can be directly compared with the theoretical values on the model.

[0030] Therefore, the three reference circles are the key elements in measurement to achieve high precision, repeatability, and compliance with standards. They establish a reliable spatial reference framework for the entire measurement process.

[0031] In an embodiment, asFigure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown in FIG. 4, the flushness measuring module 400 includes a reference detection table 410 and a flushness gauge 420, the reference detection table 410 is fixedly installed on the assembly table 100, and the workpiece 200 to be measured is installed on the table top (usually the upper end face) of the reference detection table 410. The side of the reference detection table 410 is provided with a reference surface 411, and the reference detection table 410 as a whole is in the shape of a cuboid, one side of which is the reference surface 411. Of course, the reference detection table 410 can also be in the shape of a semicircle or other shapes, which are not listed here. The flushness gauge 420 includes a gauge body 421 and a blade edge 422, and the reference measuring surface 4211 of the gauge body 421 is attached to the reference surface 411 of the reference detection table 410. The blade edge 422 is aligned with the side end face of the workpiece 200 to be measured. When the gauge body 421 moves along the extension direction of the reference surface 411, the blade edge 422 can detect the distance from the side end face of the workpiece 200 to be measured, so as to measure the flatness of the side of the workpiece 200 to be measured.

[0032] Specifically, the flushness gauge 420 (also known as a blade gauge, a flush edge gauge or an edge gauge) is a precision measuring tool specially used for accurately measuring the distance from the edge of a hole, groove or notch to the reference surface 411 or checking whether the surface is flush. Its core principle lies in its unique structural design, especially its ultra-thin, flat and sharp measuring blade edge 422. The key feature of the flushness gauge 420 is that the measuring end has a very thin (usually only a few tenths of a millimeter or even thinner), high flatness and extremely sharp edge. This ultra-thin and sharp blade edge 422 can penetrate into a groove or a hole, or easily insert into the bottom of a narrow gap, aperture or groove, so as to accurately contact the theoretical corner point or bottom edge line of the measured feature (the side end face of the workpiece 200 to be measured) without being blocked or raised by its own thickness. The plane where the blade edge 422 of the flushness gauge 420 is located and the reference measuring surface 4211 (usually the bottom surface or side surface) of the gauge body 421 maintain a very high degree of perpendicularity or parallelism. When the reference measuring surface 4211 is tightly attached to the reference surface 411 of the workpiece 200 to be measured, the position of the blade edge 422 directly represents the accurate distance from the reference surface 411 to the contact point of the blade edge 422.

[0033] The measurement principle of the leveling ruler 420 is summarized as follows: first, the reference measurement surface 4211 (bottom surface or side surface) of the leveling ruler 420 is stably and closely attached to the reference surface 411 of the reference detection table 410. Then, the ultra-thin sharp edge 422 of the leveling ruler 420 is gently pushed to accurately contact the side end surface of the workpiece 200. At this time, the scale line (or digital display reading) on the ruler body 421 of the leveling ruler 420 at the indicated value is the accurate distance from the reference surface 411 to the contact point (i.e., the root of the target edge) of the edge 422, and the scale is directly marked on the position of the contact point of the edge 422 relative to the reference surface 411.

[0034] Further, it needs to be explained that the reference detection table 410 refers to a fixed platform for carrying the workpiece 200 and providing a reference positioning, which can be realized by processing a cuboid metal block to form a table surface and a reference surface 411. The table surface is used to support the workpiece 200, and the reference surface 411 provides a guide reference for the movement of the leveling ruler 420. The leveling ruler 420 refers to a measuring tool for detecting flatness, which can be realized by adopting a rigid ruler-like structure with a reference measurement surface 4211 and an edge 422. The reference measurement surface 4211 slides in contact with the reference surface 411 of the reference detection table 410, and the edge 422 is used to form a gap detection with the side end surface of the workpiece 200. The reference surface 411 refers to a plane on the side of the reference detection table 410 for guiding the leveling ruler 420, which can be realized by forming a high-precision plane through mechanical processing. The extension direction of the reference surface 411 is consistent with the measurement direction of the side end surface of the workpiece 200. The reference measurement surface 4211 refers to the plane on the leveling ruler 420 that contacts the reference surface 411, which can be realized by forming a smooth surface through polishing or grinding to ensure smooth sliding and no gap when attached to the reference surface 411. The edge 422 refers to the sharp edge on the leveling ruler 420 for detecting the flatness of the side end surface of the workpiece 200, which can be realized by adopting a thin sheet structure made of hard alloy material, and the thickness can be adjusted according to the measurement accuracy requirements.

[0035] Specifically, after the workpiece 200 is installed on the table surface of the reference detection table 410, the reference measurement surface 4211 of the leveling ruler 420 is attached and moved along the reference surface 411, and the edge 422 is aligned with the side end surface of the workpiece 200. When the leveling ruler 420 slides along the extension direction of the reference surface 411, the change in the gap between the edge 422 and the side end surface can be observed visually or detected by an auxiliary sensor, such as measuring the gap value by a caliper, to determine whether the side end surface is flat. If the side end surface is not flat, the gap between the edge 422 and the side end surface will change with the moving position, and then the flatness deviation can be calculated through the gap data.

[0036] Compared with the prior art, the flatness detection in the prior art usually needs to use a three-coordinate measuring machine or a special flatness instrument alone, the operation steps are cumbersome and need to be clamped multiple times. The present scheme directly completes the flatness detection by sliding the leveling ruler 420 after the workpiece to be detected 200 is fixed, without the need for additional equipment or repeated positioning, simplifying the detection process. In addition, the rigid structure design of the reference detection table 410 and the leveling ruler 420 reduces the error risk caused by the deformation of the measuring tool.

[0037] Further, the leveling ruler 420 includes a mechanical leveling ruler 420 and a digital leveling ruler 420. The mechanical leveling ruler 420 has precise etched scale lines, direct reading, and lower cost, but the reading accuracy is limited by the resolution of the human eye and the scale density. The digital leveling ruler 420 is a high-precision electronic digital display device integrated on the basis of the mechanical ruler, which is more intuitive and accurate (usually with a resolution of 0.01 mm), and has more functions (such as zero clearing, metric / English conversion).

[0038] But not limited to this, in other embodiments, the leveling measurement module 400 can also be a system that uses infrared to measure.

[0039] In an embodiment, as shown in Figure 1 and Figure 2 The clamping and positioning module 500 includes two adjusting positioning parts 510 arranged opposite along the length direction of the workpiece to be detected 200. The two adjusting positioning parts 510 respectively abut the two ends of the workpiece to be detected 200 to limit the movement of the workpiece to be detected 200 along the horizontal plane. It should be noted that although the two adjusting positioning parts 510 are arranged in the length direction of the workpiece to be detected 200, since the adjusting positioning parts 510 respectively have abutting forces on the workpiece to be detected 200, the adjusting positioning parts 510 can also limit the movement of the workpiece to be detected 200 along the width direction of the workpiece to be detected 200 through the friction between the adjusting positioning parts 510 and the workpiece to be detected 200. That is, the adjusting positioning parts 510 can limit the movement of the workpiece to be detected 200 along the entire horizontal plane.

[0040] Compared with the prior art, the present scheme can quickly adapt to the length of the workpiece to be detected 200 and realize two-way constraint through the symmetrical arrangement of the two-way adjusting positioning parts 510, significantly shortening the clamping adjustment time, and avoiding the deformation of the workpiece to be detected 200 caused by uneven clamping force. Further, through the above technical scheme, the present application can realize reliable fixation of the workpiece to be detected 200 in the horizontal direction, ensure the stability of the workpiece to be detected 200 during the detection process, reduce the repeated measurement operation caused by the displacement of the workpiece to be detected 200, thereby improving the detection efficiency and reducing the operation complexity. Moreover, the workpiece to be detected 200 of the present application can continue to detect the machining precision of the other side of the workpiece to be detected 200 after the edge folding, further improving the detection efficiency.

[0041] However, this is not the only embodiment. In other embodiments, the clamping and positioning module 500 may also use tooling fixtures to clamp both ends of the workpiece 200 to be tested.

[0042] Furthermore, in one embodiment, as Figures 3-5 As shown, the adjusting positioning part 510 includes a fixed platform 511, a push rod 512, and a movable pin 513. The fixed platform 511 is fixedly installed on the assembly platform 100 by fasteners such as bolts. The fixed platform 511 is provided with a movable cavity 5111. One end of the push rod 512 is inserted into the movable cavity 5111 and moves along the length direction of the workpiece 200 to be tested. The other end abuts against the workpiece 200 to be tested. The push rod 512 abuts against the head of the workpiece 200 to be tested in a T-shape to increase the pressure of the push rod 512 on the workpiece 200 to be tested. The push rod 512 is provided with a plurality of positioning holes 5121 spaced apart along the length direction of the workpiece 200 to be tested. The movable pin 513 can pass through the inner wall (upper side wall) of the movable cavity 5111 and the corresponding positioning hole 5121 in sequence to adjust the length of the push rod 512 extending out of the movable cavity 5111 toward the workpiece 200 to be tested.

[0043] The fixed platform 511 is a support structure that supports the push rod 512 and provides the movable cavity 5111. It can be made of metal and machined into a block structure with through holes. Its function is to guide and limit the movement of the push rod 512. The push rod 512 is a rod-shaped component that abuts against the workpiece 200 and adjusts its clamping position. It can be made of a smooth-surfaced prismatic steel rod. Its function is to adjust the contact position with the workpiece 200 by extending and retracting. The movable pin 513 is a locking component that fixes the position of the push rod 512. It can be made of a mechanical structure in which the pin 5131 engages with the positioning hole 5121. Its function is to limit the movement range of the push rod 512 by inserting it into the positioning hole 5121 at different positions. The positioning hole 5121 is a hole structure distributed along the length of the push rod 512. It can be made of equally spaced circular holes. Its function is to provide multiple selectable fixing positions for the movable pin 513.

[0044] Specifically, the fixed platform 511 is bolted to the assembly platform 100, and the push rod 512 can slide along the length of the workpiece 200 after being inserted into the movable cavity 5111. When the clamping position needs to be adjusted, the push rod 512 is pulled outward or pushed inward to clamp the end of the workpiece 200. After the multiple positioning holes 5121 on the surface of the push rod 512 are aligned with the holes on the side wall of the movable cavity 5111, the position of the push rod 512 can be locked by inserting the movable pin 513. For example, when the length of the workpiece 200 changes, different positions of the positioning holes 5121 can be selected for fixing, thereby adapting to the clamping requirements of workpieces 200 of different sizes.

[0045] Compared with the prior art, the present scheme realizes quick adjustment and reliable fixing of the position of the push rod 512 through cooperation of the movable bolt 513 and the plurality of positioning holes 5121, reduces the time for replacing the fixture, thereby simplifying the operation steps and improving the detection efficiency.

[0046] Further, in an embodiment, the movable bolt 513 comprises a plug rod 5131 and a rod head 5132, the movable bolt 513 is sequentially arranged through the inner wall of the movable cavity 5111 and the corresponding positioning hole 5121 through the plug rod 5131, and the rod head 5132 is detachably connected to one end of the plug rod 5131 away from the fixed table 511.

[0047] The plug rod 5131 is a rigid component with a cylindrical or prismatic structure, which can be made of metal material, and is used to form positioning cooperation through the inner wall of the movable cavity 5111 and the positioning hole 5121. The rod head 5132 is an operating component connected to the end of the plug rod 5131, which can be detachably installed by screw connection or buckle connection, and is convenient for quick disassembly and assembly to adjust the extension length of the push rod 512.

[0048] Specifically, when the extension length of the push rod 512 needs to be adjusted, the operator can detach the rod head 5132 and pull out the plug rod 5131, so that the push rod 512 freely slides in the movable cavity 5111 to the target position, and then the plug rod 5131 is reinserted to pass through the corresponding positioning hole 5121, and the rod head 5132 is installed at the end of the plug rod 5131 to complete the fixing. The detachable connection design of the rod head 5132 and the plug rod 5131 avoids the operation of disassembling the bolt with the help of additional tools in the traditional gauge, and simplifies the adjustment process.

[0049] Further, in an embodiment, the movable bolt 513 further comprises a push plate 5133, a spring 5134 and a limiting plate 5135, the limiting plate 5135 is fixedly arranged on the outer circumferential side of the plug rod 5131, the push plate 5133 is movably arranged on the outer circumferential side of the plug rod 5131, and the push plate 5133 is arranged on the side of the limiting plate 5135 close to the rod head 5132, one end of the spring 5134 abuts against the push plate 5133, and the other end abuts against the limiting plate 5135, and the spring 5134 can exert a force on the rod head 5132 in the direction away from the workpiece 200 to be measured through the push plate 5133.

[0050] The push plate 5133 refers to a plate-shaped structure sleeved on the outer circumferential side of the insertion rod 5131 and axially slidable along the insertion rod 5131, which can be implemented by a metal stamping part or an injection molding part, and functions to transmit the elastic force of the spring 5134 to the rod head 5132. The limiting plate 5135 refers to a ring-shaped structure fixed on the outer circumferential side of the insertion rod 5131, which can be implemented by welding or threaded connection, and functions to limit the maximum displacement range of the push plate 5133. The spring 5134 refers to an elastic energy storage element, which can be implemented by a spiral compression spring 5134 or a tower spring 5134, and functions to maintain the stable connection state of the rod head 5132 and the insertion rod 5131 through pre-tightening force.

[0051] Specifically, when the length of the push rod 512 needs to be adjusted, the operator can manually compress the push plate 5133 to make the spring 5134 contract, at which time the threaded connection head 5138 of the insertion rod 5131 can pass through the light hole section 5136 of the rod head 5132 and separate from the threaded hole section 5137. After the length adjustment is completed, the spring 5134 automatically resets and pushes the push plate 5133 back to its original position, so that the rod head 5132 and the insertion rod 5131 are re-tightened. This structure automatically maintains the connection stability of the insertion rod 5131 and the rod head 5132 through the elastic force of the spring 5134, avoiding accidental disengagement of the insertion pin due to vibration or external force. Moreover, with this arrangement, the compression force of the rod head 5132 can be reduced, and the service life of the composite gauge can be improved.

[0052] Specifically, in an embodiment, the rod head 5132 is provided with a light hole section 5136 and a threaded hole section 5137 distributed in sequence along the direction from the limiting plate 5135 to the push plate 5133, and the insertion rod 5131 is provided with a threaded connection head 5138. When the rod head 5132 compresses the spring 5134 through the push plate 5133, the threaded connection head 5138 of the insertion rod 5131 can first pass through the light hole section 5136 and then be threadedly fastened with the threaded hole section 5137, so as to threadedly connect the insertion rod 5131 and the rod head 5132.

[0053] The light hole section 5136 refers to a through hole with a hole diameter slightly larger than the outer diameter of the threaded connection head 5138, which can be implemented by a cylindrical through hole structure, and functions to provide an unobstructed passage for the threaded connection head 5138. The threaded hole section 5137 refers to a hole structure with internal threads in the rod head 5132, which can be implemented by a threaded structure matching the external threads of the threaded connection head 5138, and functions to achieve fastening connection of the rod head 5132 and the insertion rod 5131 through thread engagement. The threaded connection head 5138 refers to a protruding structure with external threads provided at the end of the insertion rod 5131, which can be implemented by a detachable threaded sleeve or an integrally formed threaded rod structure, and functions to form a stable mechanical connection through cooperation with the threaded hole section 5137.

[0054] Specifically, when the push rod 512 needs to be adjusted in length, the operator presses the head 5132 to drive the push plate 5133 to compress the spring 5134, at this time the threaded connector 5138 of the insertion rod 5131 moves along the light hole section 5136 and passes through the light hole section 5136. When the head 5132 moves to the predetermined position, the threaded connector 5138 enters the threaded hole section 5137, and by rotating the head 5132 to make the threaded connector 5138 engage with the internal thread of the threaded hole section 5137, the head 5132 is fixed on the insertion rod 5131. In this process, the light hole section 5136 provides guidance for the axial movement of the threaded connector 5138, avoiding interference of the threaded pair when not aligned, and the threaded hole section 5137 realizes self-locking function through threaded engagement.

[0055] But not limited to this, in other embodiments, the insertion rod 5131 and the head 5132 can also be clamped.

[0056] In an embodiment, the spring 5134 is in the shape of a tower, and along the direction from the limiting plate 5135 to the push plate 5133, the diameter of the spring 5134 shows a trend of increasing.

[0057] In other embodiments, the spring 5134 can also be in the shape of a cylinder.

[0058] In an embodiment, as shown in Figure 1 , Figure 2 and Figure 4 , the clamping and positioning module 500 further comprises a plurality of pressing parts 520, which are uniformly distributed and installed on both sides of the workpiece 200 along the width direction of the workpiece 200, and one end of the pressing part 520 is connected to the assembly table 100, and the other end can be pressed to the side end face (usually the upper end face) of the workpiece 200 away from the assembly table 100. Specifically, the workpiece 200 has 6 pressing parts 520 on each end, but not limited to this, in other embodiments, the number of pressing parts 520 can also be one, two, three or other numbers on each side, which are not listed here.

[0059] The pressing part 520 refers to a clamping component for applying pressure to fix the workpiece 200 under test, which can be implemented by a mechanical arm with elastic elements or adjustable bolts. The pressing part 520 is uniformly distributed on both sides of the workpiece 200 under test, and the arrangement interval is equal or follows a specific symmetry rule. The two sides in the width direction refer to the left and right edge regions of the workpiece 200 under test in the horizontal plane perpendicular to the length direction. The pressing part 520 is fixed on the assembly table 100 through the connecting end and extends to the upper surface of the workpiece 200 under test. When the pressing part 520 applies downward pressure, the workpiece 200 under test is limited between the assembly table 100 and the pressing part 520, thereby maintaining a fixed posture during detection.

[0060] Specifically, the pressing part 520 is fixed on the assembly table 100 through the connecting end and extends to the upper surface of the workpiece 200 under test. When the pressing part 520 applies downward pressure, the workpiece 200 under test is limited between the assembly table 100 and the pressing part 520, thereby maintaining a fixed posture during detection. The pressing part 520 is uniformly distributed along the two sides in the width direction of the workpiece 200 under test, so that the clamping force is symmetrically applied on both sides of the workpiece 200 under test, avoiding the inclination or deviation of the workpiece 200 under test due to uneven force on one side. For example, the pressing part 520 can be provided as two groups of symmetrically arranged clamping units, each group containing multiple pressing points distributed at intervals along the length direction of the workpiece 200 under test. By synchronously adjusting the pressure of each pressing point, the overall force balance of the workpiece 200 under test is ensured.

[0061] In some embodiments, the pressing part 520 can use a pneumatic clamp jaw or a hydraulic push rod 512 as a power source, and the size and distribution of the clamping force are adjusted by the control system. For example, the pneumatic clamp jaw is connected to the air pump through an air pipe. When the detection starts, the air pump supplies air to the clamp jaw to clamp the workpiece 200 under test, and releases the air pressure to release the clamping after the detection is completed.

[0062] Compared with the prior art, the present scheme realizes multi-point symmetric clamping through the uniformly distributed pressing part 520, effectively suppresses the displacement risk of the workpiece 200 under test during detection, and simplifies the adjustment process of the clamping mechanism.

[0063] Through the above technical scheme, the present application can significantly improve the stability of the workpiece 200 under test during detection, avoid measurement errors caused by poor clamping, and reduce local pressure on the surface of the workpiece 200 under test through the symmetrically distributed pressing part 520 design, thereby preventing deformation of the workpiece 200 under test caused by excessive extrusion, and ensuring the accuracy and consistency of the detection results.

[0064] But not limited to, in other embodiments, the pressing part 520 can also use hydraulic pressing tool to press the workpiece 200 to be tested.

[0065] Further, in an embodiment, the pressing part 520 includes a handle 521, a connecting arm 522, a pressing arm 523 and a support seat 524, the support seat 524 is fixedly installed on the assembly table 100 and protrudes from the assembly table 100, the handle 521 and the connecting arm 522 are hinged to the support seat 524, the handle 521 can drive the pressing arm 523 to press the end face of the workpiece 200 to be tested through the connecting arm 522, or to separate from the end face of the workpiece 200 to be tested, in this embodiment, when the handle 521 rotates towards the direction away from the workpiece 200 to be tested, the pressing arm 523 separates from the end face of the workpiece 200 to be tested, and when the handle 521 rotates towards the direction close to the workpiece 200 to be tested, the pressing arm 523 presses the end face of the workpiece 200 to be tested.

[0066] It should be noted that one connecting arm 522 can connect one pressing arm 523, or connect multiple pressing arms 523.

[0067] As can be seen from the above, the workpiece 200 to be tested is fixed on the center area of the assembly table 100 by the clamping and positioning module 500 during detection. Three reference circles are installed on the periphery of the clamping and positioning module 500, forming a stable triangular reference network, and the control system establishes a detection coordinate system according to the spatial coordinates of the reference circles. The probe moves along the surface of the workpiece 200 to be tested and collects the three-dimensional coordinates of multiple feature points, and the control system fits the theoretical profile by the least square method and calculates the deviation between the actual profile and the theoretical value. At the same time, the reference detection table 410 of the flush measurement module 400 is fixed on the assembly table 100, and the side reference surface 411 is parallel to the reference circle coordinate system. After the corresponding plane of the workpiece 200 to be tested is attached to the reference detection table 410, the flush gauge 420 is pushed to make the reference measurement surface 4211 slide along the reference surface 411, and the gap between the knife edge 422 and the side end face of the workpiece 200 to be tested reflects the flatness error, which is transmitted to the control system for comprehensive analysis.

[0068] Compared with the prior art, the present scheme integrates multiple detection modules through the assembly table 100, so that the workpiece 200 to be tested can complete the profile and flatness detection in one clamping, eliminating the cumulative error caused by repeated positioning. In addition, the same coordinate system established by the reference circle can directly serve the profile calculation and flatness evaluation, avoiding data conversion error between multiple devices. Therefore, through the above technical scheme, the present application realizes the synchronization operation of the S-shaped structure plate 210 multi-parameter detection, reduces the clamping times and equipment switching time of the workpiece 200 to be tested. The detection data is directly processed in the same coordinate system, which improves the consistency of the measurement results. The modular design reduces the complexity of the detection tool development, is suitable for rapid adaptive detection of different sizes of workpieces 200 to be tested, and greatly improves the detection efficiency.

[0069] Any technical features in the above-described embodiments can be combined in any manner, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist in contradiction, it should be considered that they are within the scope of the present disclosure.

[0070] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the application protection scope of the present application should be subject to the appended claims.

[0071] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0072] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0073] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] In this application, unless otherwise specified and limited, a first feature "on", "above", or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above", and "on" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below", and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0075] It is noted that, as used in this application, the terms "on", "above", "under", "below", "left", "right", and similar terms, are used on a relative basis to one another to describe a spatial relationship between elements. These terms are not intended to denote absolute positional relationships between elements.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

Claims

1. A composite gauge, characterized by, The application relates to a profile measurement device, which comprises an assembling table (100), a profile measurement module (300), a clamping positioning module (500) and a flush measurement module (400), wherein the clamping positioning module (500) is installed on the assembling table (100) and used for clamping a workpiece (200) to be measured, the profile measurement module (300) comprises three reference circles, a probe and a control system, the three reference circles are respectively installed on the assembling table (100) and arranged around the clamping positioning module (500) to establish a coordinate system for the workpiece (200) to be measured, the probe can detect a plurality of feature points on a corresponding surface of the workpiece (200) to be measured, and the control system reads three-dimensional coordinate data of the feature points in the coordinate system; the control system can calculate the profile of the corresponding surface of the workpiece (200) to be measured according to the plurality of feature points; and the flush measurement module (400) is installed on the assembling table (100) and used for measuring the flatness of a corresponding plane of the workpiece (200) to be measured.

2. The composite gauge of claim 1, wherein, The flush measurement module (400) comprises a reference detection table (410) and a flush ruler (420), the reference detection table (410) is fixedly installed on the assembling table (100), the workpiece (200) to be measured is installed on a table top of the reference detection table (410), a side of the reference detection table (410) is provided with a reference surface (411), the flush ruler (420) comprises a ruler body (421) and a blade (422), the ruler body (421) is provided with a reference measurement surface (4211), the reference measurement surface (4211) can be attached to the reference surface (411) and moved, the blade (422) is aligned with a side end surface of the workpiece (200) to be measured, when the ruler body (421) moves along the extension direction of the reference surface (411), the blade (422) can detect the distance from the side end surface of the workpiece (200) to be measured, so that the flatness of the side end surface of the workpiece (200) to be measured is measured.

3. The composite gauge of claim 2, wherein, The reference detection table (410) is in the shape of a cuboid, and one side of the reference detection table (410) is used as the reference surface (411).

4. The composite gauge of claim 1, wherein, The clamping positioning module (500) comprises two adjusting positioning parts (510) which are oppositely arranged along the length direction of the workpiece (200) to be measured, and the two adjusting positioning parts (510) are respectively arranged at two ends of the workpiece (200) to be measured to limit the movement of the workpiece (200) to be measured along the horizontal plane.

5. The composite gauge of claim 4, wherein, The adjusting positioning part (510) comprises a fixed table (511), a push rod (512) and a movable bolt (513), the fixed table (511) is fixedly installed on the assembly table (100), the fixed table (511) is provided with a movable cavity (5111), one end of the push rod (512) is inserted into the movable cavity (5111) and movably matched with the movable cavity (5111) along the length direction of the workpiece (200), the other end is abutted with the workpiece (200), the push rod (512) is provided with a plurality of positioning holes (5121) which are arranged at intervals along the length direction of the workpiece (200), the movable bolt (513) can be sequentially arranged on the inner wall of the movable cavity (5111) and the corresponding positioning hole (5121), so as to adjust the length of the push rod (512) extending out of the movable cavity (5111) towards the workpiece (200).

6. The composite gauge of claim 5, wherein, The movable bolt (513) comprises a plug rod (5131) and a rod head (5132), the movable bolt (513) is sequentially arranged on the inner wall of the movable cavity (5111) and the corresponding positioning hole (5121) through the plug rod (5131), and the rod head (5132) is detachably connected to one end of the plug rod (5131) away from the fixed table (511).

7. The composite gauge of claim 6, wherein, The movable bolt (513) further comprises a push plate (5133), a spring (5134) and a limiting plate (5135), the limiting plate (5135) is fixedly arranged on the outer circumferential side of the plug rod (5131), the push plate (5133) is movably sleeved on the outer circumferential side of the plug rod (5131), the push plate (5133) is arranged on one side of the limiting plate (5135) close to the rod head (5132), one end of the spring (5134) is abutted with the push plate (5133), the other end is abutted with the limiting plate (5135), and the spring (5134) can exert a force on the rod head (5132) away from the workpiece (200) through the push plate (5133).

8. The composite gauge of claim 7, wherein, The rod head (5132) is provided with a light hole section (5136) and a threaded hole section (5137) which are sequentially distributed along the direction from the limiting plate (5135) to the push plate (5133), and the plug rod (5131) is provided with a threaded connector (5138), when the rod head (5132) compresses the spring (5134) through the push plate (5133), the threaded connector (5138) can pass through the light hole section (5136) and be tightly matched with the threaded hole section (5137).

9. The composite gauge of claim 7, wherein, The spring (5134) is in a tower type, and along the direction from the limiting plate (5135) to the push plate (5133), the diameter of the spring (5134) shows an increasing trend.

10. The composite gauge of claim 1, wherein, The clamping positioning module (500) further comprises a plurality of pressing portions (520) which are uniformly distributed and installed on both sides of the workpiece (200) along the width direction of the workpiece (200), one end of the pressing portion (520) is connected to the assembly table (100), and the other end can be pressed to the side end face of the workpiece (200) away from the assembly table (100).

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