A device for measuring the dimensions of a rectangular cross-section tensile specimen

Abstract

This invention belongs to the field of material physical property testing and inspection, specifically relating to a rectangular cross-section tensile specimen size measuring device. It aims to solve the problems of high assembly requirements and inconvenience in use of existing measuring devices. This invention includes a robotic arm and a measuring device. The robotic arm is fixedly mounted on a base, and the measuring device is fixedly mounted on a support device. The robotic arm can feed the rectangular cross-section tensile specimen into the measuring device. The measuring device includes a width millimeter-wave sensor and a thickness millimeter-wave sensor. The width and thickness millimeter-wave sensors respectively measure the width and thickness of the rectangular cross-section tensile specimen held by the specimen clamping mechanism. This greatly improves the automation and accuracy of feeding, reduces human error, and provides a stable and reliable guarantee for the measurement of rectangular cross-section tensile specimen dimensions.

Description

Technical Field

[0001] This invention belongs to the field of material physical property testing and inspection, and specifically relates to a device for measuring the size of a rectangular cross-section tensile specimen. Background Technology

[0002] Tensile testing is an important method for testing mechanical properties. Through tensile testing, data reflecting multiple properties of metallic materials, such as elasticity, strength, and plasticity, can be obtained, thus playing a fundamental and crucial role in materials quality assessment, production research and development, and other fields. In the test, the cross-sectional area of ​​the specimen is an indispensable and important parameter; inaccurate measurement will directly affect the accuracy of key indicators such as tensile strength and reduction of area.

[0003] Currently, manual measurement is often used: the tester holds a vernier caliper, keeping it perpendicular or parallel to the axis of the rectangular cross-section specimen and avoiding shaking, and then visually reads the value before entering it into the computer for calculation. This manual measurement method has significant drawbacks: operators are prone to fatigue, visual errors and varying levels of proficiency result in low measurement efficiency and large errors, making it difficult to meet the demands of high-precision material testing. Similar automatic dimensional measuring devices for specimens on the market suffer from problems such as high assembly requirements, cumbersome adjustments, low output force, and unsatisfactory centering results. Summary of the Invention

[0004] To address the problems of high assembly requirements and inconvenience in use of existing measuring devices, this invention provides a rectangular cross-section tensile specimen dimension measuring device, comprising:

[0005] The robotic arm is fixedly mounted on the base;

[0006] The measuring device is fixedly mounted on the support device;

[0007] The robotic arm is capable of feeding a rectangular cross-section tensile specimen into the measuring device, which includes a width millimeter-wave sensor and a thickness millimeter-wave sensor. The width millimeter-wave sensor and the thickness millimeter-wave sensor respectively measure the width and thickness of the rectangular cross-section tensile specimen held by the specimen clamping mechanism.

[0008] According to some embodiments of this application, a rectangular cross-section tensile specimen size measuring device is provided, wherein the specimen clamping mechanism includes a cylinder, an adjusting component, a guide rod, and a fixed base;

[0009] The fixing base is fixed to the back plate. A groove is formed on the top of the fixing base. The adjusting member is disposed in the groove on the top of the fixing base. A guide rod is horizontally arranged on the top of the fixing base. The cylinder is disposed at the bottom of the fixing base. The output end of the cylinder is fixedly connected to the bottom of the adjusting member and controls the longitudinal movement of the adjusting member. A strip-shaped groove is formed on the end face of the adjusting member. A connecting post is disposed in the strip-shaped groove. One end of the connecting post extends into the sliding clamping assembly. The two sliding clamping assemblies are symmetrically arranged. When the cylinder drives the adjusting member to move longitudinally, the two sliding clamping assemblies move closer to or further away from each other.

[0010] According to some embodiments of this application, a rectangular cross-section tensile specimen size measuring device is provided, wherein the sliding clamping assembly includes a movable base, a connecting plate, and a clamp;

[0011] Both the movable seat and the connecting plate are mounted on the guide rod. The connecting plate is fixedly mounted on the outside of the movable seat. The clamp is fixedly mounted on the other end of the connecting plate. The clamp is fixedly mounted on the inside of the connecting plate. One end of the connecting column extends into the movable seat. When the cylinder drives the adjusting member to move longitudinally, the movable seats on both sides drive the clamp to move closer or further away from each other.

[0012] According to some embodiments of this application, a rectangular cross-section tensile specimen size measuring device is provided, wherein an opening is provided in the middle of the end face of the back plate, and two width millimeter wave sensors and two thickness millimeter wave sensors are respectively provided and correspondingly disposed on the inner side of the opening of the back plate.

[0013] A rectangular cross-section tensile specimen size measuring device provided according to some embodiments of this application further includes a calibration component, which includes a first fixing block, a second fixing block, a telescopic device, a connecting shaft, and a calibration module;

[0014] The first fixing block and the second fixing block are both fixedly mounted on the back plate. There are two second fixing blocks, which are respectively mounted on both sides of one of the width millimeter-wave sensors. The two second fixing blocks are connected by the same connecting shaft. The calibration module is fixedly mounted on the connecting shaft. One end of the telescopic device is hinged to the first fixing block, and the other end of the telescopic device is hinged to the calibration module. When the telescopic device extends or retracts, it can control the rotation of the calibration module.

[0015] According to some embodiments of this application, a rectangular cross-section tensile specimen size measuring device is provided, wherein the robotic arm is a multi-axis robot and the end of the robotic arm is provided with a gripper.

[0016] According to some embodiments of this application, a rectangular cross-section tensile specimen size measuring device is provided, wherein the gripper of the robotic arm is covered with elastic silicone.

[0017] The beneficial effects of this invention are:

[0018] The robotic arm, mounted on a base, possesses multiple degrees of freedom, combining rigidity and lightweight design. High-precision torque sensors and servo drive systems at the joints ensure precise and stable movements. After grasping the sample, the robotic arm smoothly lifts the sample and adjusts its posture and position. Based on communication and positioning feedback with the measuring device, it accurately places the sample into the measuring device. The sample is then measured using a millimeter-wave sensor. After completing sample delivery, the robotic arm automatically resets. This device is more convenient to use, greatly improving the automation and accuracy of feeding, reducing human error, and providing a stable and reliable guarantee for the measurement of rectangular cross-section tensile specimen dimensions. This promotes the efficient and accurate testing and inspection of material physical properties. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of some embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the internal front structure of the measuring device according to some embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the internal rear structure of the measuring device according to some embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the sample clamping mechanism structure of some embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the calibration component structure in some embodiments of this application.

[0025] In the diagram: 1. Robotic arm; 2. Base; 3. Measuring device; 31. Width millimeter-wave sensor; 32. Thickness millimeter-wave sensor; 4. Support device; 5. Rectangular cross-section tensile specimen; 6. Specimen clamping mechanism; 61. Cylinder; 62. Adjusting component; 63. Moving seat; 64. Connecting plate; 65. Guide rod; 66. Fixture; 67. Connecting column; 68. Strip groove; 69. Fixed seat; 7. Back plate; 8. Calibration assembly; 81. First fixing block; 82. Second fixing block; 83. Telescopic device; 84. Connecting shaft; 85. Calibration module. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1-5 As shown, the present invention provides a device for measuring the dimensions of a rectangular cross-section tensile specimen, comprising:

[0029] Robotic arm 1 is fixedly mounted on base 2;

[0030] Measuring device 3 is fixedly mounted on support device 4;

[0031] The robotic arm 1 can feed the rectangular cross-section tensile specimen 5 into the measuring device 3. The measuring device 3 includes a width millimeter wave sensor 31 and a thickness millimeter wave sensor 32. The width millimeter wave sensor 31 and the thickness millimeter wave sensor 32 measure the width and thickness of the rectangular cross-section tensile specimen 5 held by the specimen clamping mechanism 6, respectively.

[0032] In practice, the robotic arm 1 is mounted on a stable base 2 next to the measuring device 3. It possesses multiple degrees of freedom, combining rigidity and lightweight design. High-precision torque sensors and a servo drive system at the joints ensure precise and stable movement. When the system triggers the sample feeding process, the robotic arm 1 receives a start signal and begins operation. The gripper claws of its flexible clamping device are custom-designed for rectangular cross-section tensile specimens 5, and are covered with elastic silicone to firmly hold the specimen and prevent damage. The robotic arm 1 uses an integrated vision image processing system to quickly identify and locate the specimen from the storage area, accurately calculate the gripping and placement path, extend along a preset trajectory, and safely grip the specimen by adjusting the clamping force through a built-in high-precision pressure sensor and force feedback control system. After gripping, the robotic arm 1 smoothly lifts the specimen, adjusts its posture and position, and accurately places it into the measuring device 3 based on communication and positioning feedback. After completing the sample feeding, it automatically resets, ready for the next operation. Through the automated operation of the robotic arm 1, the degree of automation and accuracy of feeding is greatly improved, human error is reduced, and a stable and reliable guarantee is provided for the measurement of rectangular cross-section tensile specimen dimensions, promoting the efficient and accurate conduct of material physical property testing.

[0033] In specific implementation, two sets of width millimeter-wave sensors 31 are set, respectively on both sides of the width direction of the rectangular cross-section tensile specimen 5, and two sets of thickness millimeter-wave sensors 32 are also set, respectively on both sides of the thickness direction of the rectangular cross-section tensile specimen 5. The millimeter-wave sensors adopt FMCW (Frequency Modulated Continuous Wave) technology, transmitting millimeter-wave signals whose frequency changes linearly with time. After the signal encounters the target object, it is reflected back. Since signal propagation takes time, there will be a frequency difference between the received echo signal and the transmitted signal. This frequency difference has a specific mathematical relationship with the distance between the target object and the sensor. By measuring the frequency difference, the distance to the target object can be calculated, thereby realizing the measurement of liquid level. After the millimeter-wave sensor collects the echo signal containing the target distance information, it will perform a series of processing on the signal. Using radar signal processing technology, the received weak echo signal is amplified, filtered, and mixed to convert it into an easily processed intermediate frequency signal. Then, the built-in high-precision liquid level detection intelligent algorithm is used to analyze and process the intermediate frequency signal, extract the feature information related to the liquid level, further improve the accuracy and precision of the measurement, and achieve millimeter-level precise detection of the target distance within the specified area.

[0034] In some embodiments, the sample clamping mechanism 6 includes a cylinder 61, an adjusting member 62, a guide rod 65, and a fixed base 69;

[0035] The fixed base 69 is fixed to the back plate 7. The top of the fixed base 69 has a groove. The adjusting member 62 is set in the groove at the top of the fixed base 69. The top of the fixed base 69 has a horizontally arranged guide rod 65. The cylinder 61 is set at the bottom of the fixed base 69. The output end of the cylinder 61 is fixedly connected to the bottom of the adjusting member 62 and controls the longitudinal movement of the adjusting member 62. The end face of the adjusting member 62 has an inclined strip groove 68. A connecting post 67 is set in the strip groove 68. One end of the connecting post 67 extends into the sliding clamping assembly. The two sliding clamping assemblies are symmetrically arranged. When the cylinder 61 drives the adjusting member 62 to move longitudinally, the two sliding clamping assemblies move closer to each other or further away.

[0036] In specific implementation, the back plate 7 is a fixed plate on the side of the measuring device 3 near the robotic arm 1. Two guide rods 65 are horizontally inserted through the top of the fixed base 69. Sliding clamping components are set on the two guide rods 65. The two strip grooves 68 are arranged in a figure-eight shape. In use, the cylinder 61 lifts the adjusting component 62. Under the restriction of the strip grooves 68, the connecting columns 67 inside the strip grooves 68 move away from each other, so that the sliding clamping components on both sides move away from each other. Conversely, when the cylinder 61 controls the adjusting component 62 to descend, the sliding clamping components on both sides move closer to each other through the movement of the connecting columns 67 in the strip grooves 68, so that the sample can be clamped.

[0037] In some embodiments, the sliding clamping assembly includes a movable base 63, a connecting plate 64, and a clamp 66;

[0038] The movable seat 63 and the connecting plate 64 are both mounted on the guide rod 65. The connecting plate 64 is fixedly mounted on the outside of the movable seat 63. The other end of the connecting plate 64 is fixedly mounted with a clamp 66, which is fixedly mounted on the inside of the connecting plate 64. One end of the connecting column 67 extends into the movable seat 63. When the cylinder 61 drives the adjusting member 62 to move longitudinally, the movable seats 63 on both sides drive the clamp 66 to move closer or further away from each other.

[0039] In practice, when the cylinder 61 controls the adjustment component 62 to move, the connecting column 67 slides in the strip groove 68. Since the connecting column 67 is connected to the movable seat 63 and the movable seat 63 is set on the guide rod 65, the movable seat 63 slides horizontally on the guide rod 65. The movement of the movable seat 63 drives the clamps 66 at the top to move closer or further apart, thereby achieving the clamping and releasing of the sample.

[0040] In some embodiments, an opening is provided in the middle of the end face of the back plate 7, and two width millimeter wave sensors 31 and two thickness millimeter wave sensors 32 are respectively provided and correspondingly disposed on the inner side of the opening of the back plate 7.

[0041] In practice, the opening in the back plate 7 allows the sample to enter the measuring device 3, where measurements are taken by the width millimeter-wave sensor 31 and the thickness millimeter-wave sensor 32, respectively.

[0042] In some embodiments, a calibration component 8 is also included, which includes a first fixing block 81, a second fixing block 82, a telescopic device 83, a connecting shaft 84, and a calibration module 85.

[0043] The first fixing block 81 and the second fixing block 82 are both fixedly mounted on the back plate 7. There are two second fixing blocks 82, which are respectively mounted on both sides of one of the width millimeter wave sensors 31. The two second fixing blocks 82 are connected by the same connecting shaft 84. The calibration module 85 is fixedly mounted on the connecting shaft 84. One end of the telescopic device 83 is hinged to the first fixing block 81, and the other end of the telescopic device 83 is hinged to the calibration module 85. When the telescopic device 83 extends or retracts, it can control the rotation of the calibration module 85.

[0044] In specific implementation, the telescopic device 83 can be a cylinder or telescopic rod, etc., with telescopic function. The position of the calibration module 85 is controlled by the telescopic device 83. The calibration module 85 is a standard sample. The sensor parameters are calibrated by the standard sample, which is equivalent to a standard gauge block. The standard gauge block is used as a reference value. At the same time, four sides are measured to calculate the thickness and width of the sample. By automatically transmitting the measurement results to the controller for calculation, the original dimensions of the rectangular cross-section are automatically calculated, which can improve the measurement accuracy and efficiency. In order to consider the irregularity of the sample processing, the average value of the data from three different locations is set for each sample as the thickness and width value of the sample. Compared with the traditional single-point or few-point measurement, the comprehensiveness and accuracy of the measurement are greatly improved, laying a reliable data foundation for the testing of material mechanical properties.

[0045] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0048] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A device for measuring the dimensions of a rectangular cross-section tensile specimen, characterized in that, include: A robotic arm (1) is fixedly mounted on a base (2); The measuring device (3) is fixedly mounted on the support device (4); The robotic arm (1) is capable of feeding a rectangular cross-section tensile specimen (5) into the measuring device (3). The measuring device (3) includes a width millimeter-wave sensor (31) and a thickness millimeter-wave sensor (32). The width millimeter-wave sensor (31) and the thickness millimeter-wave sensor (32) measure the width and thickness of the rectangular cross-section tensile specimen (5) held by the specimen clamping mechanism (6), respectively.

2. The device for measuring the dimensions of a rectangular cross-section tensile specimen according to claim 1, characterized in that, The sample clamping mechanism (6) includes a cylinder (61), an adjusting component (62), a guide rod (65), and a fixed base (69); The fixed base (69) is fixed on the back plate (7). The top of the fixed base (69) is provided with a groove. The adjusting member (62) is set in the groove at the top of the fixed base (69). The top of the fixed base (69) is provided with a guide rod (65). The cylinder (61) is set at the bottom of the fixed base (69). The output end of the cylinder (61) is fixedly connected to the bottom of the adjusting member (62) and controls the longitudinal movement of the adjusting member (62). The end face of the adjusting member (62) is inclined and provided with a strip groove (68). A connecting column (67) is provided in the strip groove (68). One end of the connecting column (67) extends into the sliding clamping assembly. The two sliding clamping assemblies are symmetrically arranged. When the cylinder (61) drives the adjusting member (62) to move longitudinally, the two sliding clamping assemblies move closer to each other or further away.

3. The device for measuring the dimensions of a rectangular cross-section tensile specimen according to claim 2, characterized in that, The sliding clamping assembly includes a movable base (63), a connecting plate (64), and a clamp (66); The movable seat (63) and the connecting plate (64) are both mounted on the guide rod (65). The connecting plate (64) is fixedly mounted on the outside of the movable seat (63). The clamp (66) is fixedly mounted on the other end of the connecting plate (64). The clamp (66) is fixedly mounted on the inside of the connecting plate (64). One end of the connecting column (67) extends into the movable seat (63). When the cylinder (61) drives the adjusting member (62) to move longitudinally, the movable seats (63) on both sides drive the clamp (66) to move closer to or further away from each other.

4. The device for measuring the dimensions of a rectangular cross-section tensile specimen according to claim 2, characterized in that, An opening is provided in the middle of the end face of the back plate (7), and two width millimeter wave sensors (31) and two thickness millimeter wave sensors (32) are respectively provided and are correspondingly located on the inner side of the opening of the back plate (7).

5. The device for measuring the dimensions of a rectangular cross-section tensile specimen according to claim 2, characterized in that, It also includes a calibration component (8), which includes a first fixing block (81), a second fixing block (82), a telescopic device (83), a connecting shaft (84), and a calibration module (85); The first fixing block (81) and the second fixing block (82) are both fixedly mounted on the back plate (7). There are two second fixing blocks (82), which are respectively mounted on both sides of one of the width millimeter wave sensors (31). The two second fixing blocks (82) are connected by the same connecting shaft (84). The calibration module (85) is fixedly mounted on the connecting shaft (84). One end of the telescopic device (83) is hinged to the first fixing block (81), and the other end of the telescopic device (83) is hinged to the calibration module (85). When the telescopic device (83) extends or retracts, it can control the rotation of the calibration module (85).

6. The device for measuring the dimensions of a rectangular cross-section tensile specimen according to claim 1, characterized in that, The robotic arm (1) is a multi-axis robot, and the end of the robotic arm (1) is equipped with a gripper.

7. The device for measuring the dimensions of a rectangular cross-section tensile specimen according to claim 1, characterized in that, The grippers of the robotic arm (1) are covered with elastic silicone.

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