An apparatus for measuring the erosion thinning of a test piece

Abstract

The application discloses a kind of for erosion thinning test piece measurement clamping positioning device, comprising: base, base clamping fixed on three-axis workbench;Supporting table, supporting table is vertically fixedly connected on base, and round mounting station is opened in supporting table, mounting disc is rotatably connected in mounting station, and rotating transmission assembly is installed on the top of supporting table;Positioning table, positioning table is fixedly connected on mounting disc;Clamping mechanism, clamping mechanism is provided with two groups, and two groups of clamping mechanism are symmetrically arranged on mounting disc;Positioning mechanism, positioning mechanism is installed on supporting table, and the front side of mounting disc is installed with annular plate, and positioning gap is opened in annular plate;Visual acquisition system, visual acquisition system is installed in the front side portion of base top surface;Control system.The application effectively avoids test piece clamping deformation and detection loosening, eliminates measurement error from clamping source, and greatly improves the accuracy and reliability of hardness detection data.

Description

Technical Field

[0001] This invention relates to the field of tooling and equipment technology for testing material hardness, and in particular to a clamping and positioning device for measuring erosion-thinned specimens. Background Technology

[0002] Erosion thinning is a common failure mode of pressure-bearing and moving components such as industrial pipelines, valves, and impellers under the scouring action of fluid media. Hardness testing of erosion-thinned specimens after service is a core testing method for assessing the degradation of material mechanical properties and determining the remaining service life of components. In Vickers and Rockwell hardness measurements, the stability of specimen clamping and positioning, as well as the accuracy of the measuring point angles, directly determine the reliability of the test data.

[0003] Currently, hardness measurements of erosion-thinned specimens often employ general-purpose, simple clamps, which have significant technical drawbacks: First, the uneven wall thickness and irregular surface of erosion-thinned specimens make it difficult to precisely control the clamping force of general-purpose clamps, easily causing specimen deformation or loosening, leading to measurement deviations. Second, the lack of a dedicated circumferential rotation adjustment structure necessitates repeated disassembly and reassembly for multi-directional, multi-point testing of specimens, resulting in cumbersome operation and extremely low testing efficiency. Third, the absence of precise limiting and visual positioning mechanisms, relying solely on manual visual alignment, leads to poor positioning accuracy of measuring points and fails to guarantee the consistency of testing benchmarks for specimens in the same batch. Fourth, the lack of integrated control and coordinated adjustment structures means that clamping, rotation, and positioning processes are operated independently, resulting in low automation and making it difficult to meet the demands of large-scale, high-precision hardness testing.

[0004] In summary, existing clamping devices cannot meet the comprehensive requirements of stable clamping, precise rotation, visual positioning, and efficient detection in the hardness measurement of erosion-thinned specimens. There is an urgent need to design a dedicated clamping and positioning mechanism to solve the above-mentioned technical pain points. Summary of the Invention

[0005] The purpose of this invention is to provide a clamping and positioning device for measuring erosion-thinned specimens, so as to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a clamping and positioning device for measuring erosion-thinned specimens, comprising: A base, which is clamped and fixed on a three-axis worktable; A support platform is vertically fixed to the base. A circular installation station is provided on the support platform. The axis of the installation station is arranged parallel to the top surface of the base. An installation plate is rotatably connected in the installation station. A rotary transmission assembly is installed on the top of the support platform. The rotary transmission assembly is in transmission cooperation with the installation plate. A positioning platform, which is fixedly connected to the mounting plate; The clamping mechanism is provided in two sets, which are symmetrically arranged on the mounting plate, and the clamping mechanism is arranged corresponding to the side of the positioning platform away from the mounting plate. A positioning mechanism is installed on the support platform. An annular plate is installed on the front side of the mounting plate. A positioning notch is provided on the annular plate. The positioning notch is in a limiting fit with the positioning mechanism. A visual acquisition system is installed on the front part of the top surface of the base, and the visual acquisition system is arranged correspondingly to the positioning platform; A control system is used to control the operation of the overall device.

[0007] According to the present invention, the measuring clamping and positioning device for erosion thinning specimens includes a rotary transmission assembly comprising a drive motor fixedly connected to the support platform, a drive gear fixedly connected to the output shaft of the drive motor, and a toothed groove formed on the outer wall of the mounting plate, wherein the drive gear meshes with the toothed groove.

[0008] According to the present invention, a clamping and positioning device for measuring erosion-thinned specimens is provided. The clamping mechanism includes a mounting block, two sets of which are symmetrically fixed on the side wall of the positioning platform. A connecting rod assembly is mounted on the mounting block. One end of the connecting rod assembly is hinged to a claw head, which is rotatably connected to the mounting block. The positioning platform is fixed to the mounting plate by two sets of support columns symmetrically fixed to the mounting plate. A horizontal plate is fixedly connected to the rear end of the two sets of support columns. A slide rod is slidably connected to the horizontal plate. One end of the slide rod is fixedly connected to a connector, which is rotatably connected to the connecting rod assembly. A spring is sleeved on the slide rod. The other end of the spring abuts against the horizontal plate and the other end abuts against the connector. A pad is fixedly connected to the other end of the slide rod. A hydraulic push rod is fixedly connected to the horizontal plate and fixed to the pad.

[0009] According to the present invention, a clamping and positioning device for measuring erosion-thinned specimens is provided, wherein a support is installed on the side wall of the positioning platform, a swing arm is rotatably connected to the support, a pressure block is fixed on the swing arm, the pressure block is arranged corresponding to the top surface of the positioning platform, a spring is fixed to the other end of the swing arm, and one end of the spring is fixed to the support.

[0010] According to the present invention, a positioning device for measuring and clamping erosion-thinned specimens is provided. The positioning mechanism includes a positioning block. A vertical groove is provided at the bottom of the mounting position of the support platform. The positioning block is slidably connected in the vertical groove. A first wedge is fixedly connected to one end of the positioning block. A telescopic rod is fixedly connected to the bottom of the vertical groove. A compression spring is sleeved on the telescopic rod. The top end of the telescopic rod is slidably engaged with the bottom surface of the first wedge. A support block is fixed to the bottom of the vertical groove. A slider is horizontally slidably connected to the top surface of the support block. A second wedge is fixed to one end of the slider. The inclined surfaces of the first wedge and the second wedge abut against each other. A push block is fixed to the other end of the slider. A spring is fixed between the push block and one side of the support platform. An adjusting bolt is installed on the support platform. The adjusting bolt is threadedly engaged with the support platform and passes through the spring.

[0011] According to the present invention, a fixing block is fixed at the bottom of the positioning platform for measuring and clamping positioning of erosion-thinned specimens.

[0012] According to the present invention, the visual acquisition system of the measuring clamping and positioning device for erosion thinning specimens includes a mounting base and a visual acquisition camera. The mounting base is fixedly connected to the top surface of the base, and the visual acquisition camera is provided in several groups, which are respectively mounted on the mounting base.

[0013] According to the present invention, the measuring clamping and positioning device for erosion thinning specimens has scale lines on the outer contour of the mounting position of the annular plate and the support platform.

[0014] The present invention discloses the following technical effects: This invention employs two sets of symmetrical clamping mechanisms in conjunction with a positioning stage to hold the specimen. It can accommodate specimens with uneven wall thickness and irregular surfaces after erosion and thinning. The clamping force is uniform and stable, effectively avoiding specimen deformation and loosening during testing. It eliminates measurement errors from the source of clamping and significantly improves the accuracy and reliability of hardness test data.

[0015] This invention integrates a rotary transmission component and a positioning mechanism, along with an annular plate with a positioning notch, enabling stepless adjustment of the circumferential angle of the specimen and precise limit locking. Combined with a vision acquisition system, it achieves visual alignment without the need for repeated manual disassembly and calibration, ensuring a unified testing benchmark and significantly improving the positioning accuracy and consistency of the testing points.

[0016] This invention controls the entire process of clamping, rotation, positioning, and data acquisition in a unified and coordinated manner through a control system. It is compatible with three-axis worktable linkage operations, simplifies the testing process, reduces the intensity of manual operation, and can efficiently complete multi-directional and multi-point hardness testing of specimens, meeting the needs of large-scale batch testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the clamping and positioning device for measuring erosion-thinned specimens according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the clamping and positioning device for measuring erosion-thinned specimens according to the present invention. Figure I ; Figure 3 This is a schematic diagram of the internal structure of the clamping and positioning device for measuring erosion-thinned specimens according to the present invention. Figure II ; Figure 4 This is a schematic diagram illustrating the cooperation relationship between the claw head and the connecting rod assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the clamping and positioning device for measuring erosion-thinned specimens according to the present invention. Figure III .

[0019] The components are as follows: 1. Base; 2. Support platform; 3. Mounting plate; 4. Positioning platform; 5. Positioning notch; 6. Annular plate; 7. Mounting block; 8. Linkage assembly; 9. Claw head; 10. Support column; 11. Horizontal plate; 12. Slide rod; 13. Connector; 14. Pad plate; 15. Hydraulic push rod; 16. Support; 17. Swing arm; 18. Positioning block; 19. First wedge block; 20. Second wedge block; 21. Push block. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-5 The present invention provides a clamping and positioning device for measuring erosion-thinned specimens, comprising: Base 1 is clamped and fixed on the three-axis worktable; Support platform 2 is vertically fixed to base 1. A circular installation station is provided on support platform 2. The axis of the installation station is arranged parallel to the top surface of base 1. Installation plate 3 is rotatably connected in the installation station. A rotary transmission component is installed on the top of support platform 2. The rotary transmission component is in transmission cooperation with installation plate 3. Positioning platform 4 is fixedly connected to mounting plate 3; The clamping mechanism is provided in two sets. The two clamping mechanisms are symmetrically arranged on the mounting plate 3, and the clamping mechanism and the positioning table 4 are arranged on the side away from the mounting plate 3 respectively. A positioning mechanism is installed on the support platform 2. An annular plate 6 is installed on the front side of the mounting plate 3. A positioning notch 5 is provided on the annular plate 6. The positioning notch 5 is in a limiting fit with the positioning mechanism. A vision acquisition system is installed on the front part of the top surface of the base 1, and the vision acquisition system is arranged correspondingly to the positioning platform 4. The control system is used to control the operation of the overall device.

[0023] In use, first, the base 1 is securely clamped and fixed onto the three-axis worktable of the hardness testing equipment to complete the overall reference positioning of the mechanism. The erosion thinning specimen to be tested is placed on the surface of the positioning table 4. The specimen is symmetrically clamped and fixed by two sets of symmetrically arranged clamping mechanisms to ensure that the specimen is clamped with uniform force and without deviation or loosening. Then, the control system starts the rotary transmission component to drive the mounting plate 3 to rotate circumferentially within the mounting position of the support table 2, driving the positioning table 4 and the specimen to rotate synchronously, thereby adjusting the testing angle and measuring point position of the specimen. The annular plate 6 on the front side of the mounting plate 3 rotates synchronously with it. When the specimen rotates to the During the target inspection station, the positioning mechanism extends and engages within the positioning notch 5 of the annular plate 6, achieving precise circumferential limiting and locking of the mounting plate 3 and the specimen, preventing deflection during the inspection process. Simultaneously, the vision acquisition system acquires real-time position images of the specimen and measuring points and feeds them back to the control system, completing visual and precise alignment. The control system, in coordination with the three-axis worktable, drives the mechanism to move, working with the hardness testing equipment to complete the hardness measurement of the specimen. For multi-point testing, the rotation, positioning, and testing processes can be repeated without repeatedly disassembling and assembling the specimen. The entire process is automated and coordinated, ensuring stable, accurate, and efficient hardness measurement operations.

[0024] The scheme is further optimized. The rotary transmission component includes a drive motor fixedly connected to the support platform 2. The output shaft of the drive motor is fixedly connected to a drive gear. The outer wall of the mounting plate 3 is provided with a toothed groove, and the drive gear meshes with the toothed groove.

[0025] The drive motor is fixed to the support platform 2 to provide power. The output shaft drives the drive gear to rotate synchronously. The drive gear meshes with the tooth groove on the outer wall of the mounting plate 3 to transmit the rotational torque to the mounting plate 3, driving the mounting plate 3 to rotate circumferentially within the mounting position of the support platform 2. By controlling the start, stop, speed and direction of the drive motor through the control system, the circumferential detection angle of the specimen can be steplessly adjusted. The transmission is smooth, the positioning accuracy is high and there is no slippage deviation.

[0026] Further optimizing the scheme, the clamping mechanism includes mounting blocks 7. Two sets of mounting blocks 7 are symmetrically fixed on the side wall of the positioning platform 4. A connecting rod assembly 8 is mounted on the mounting blocks 7. One end of the connecting rod assembly 8 is hinged to a claw head 9, which is rotatably connected to the mounting blocks 7. The positioning platform 4 is fixed to the mounting plate 3 by two sets of support columns 10 symmetrically fixed to the mounting plate 3. A horizontal plate 11 is fixedly connected to the rear end of the two sets of support columns 10. A slide rod 12 is slidably connected to the horizontal plate 11. One end of the slide rod 12 is fixedly connected to a connector 13, which is rotatably connected to the connecting rod assembly 8. A spring is sleeved on the slide rod 12. The other end of the spring abuts against the horizontal plate 11, and the other end abuts against the connector 13. A pad 14 is fixedly connected to the other end of the slide rod 12. A hydraulic push rod 15 is fixedly connected to the horizontal plate 11, and the hydraulic push rod 15 is fixed to the pad 14.

[0027] The hydraulic push rod 15 extends and retracts, causing the pad 14 and slide rod 12 to slide linearly along the horizontal plate 11. The slide rod 12 pulls the connecting rod assembly 8 through the connector 13. The connecting rod assembly 8 drives the claw head 9 to rotate around the mounting block 7, realizing the synchronous opening and closing of the two sets of claw heads 9. The spring is fitted on the outside of the slide rod 12 to provide elastic buffer and pre-tightening force, avoiding damage to the specimen by rigid clamping. The positioning table 4 is rigidly connected to the mounting plate 3 through the support column 10 to ensure the stability of the clamping reference. The symmetrical clamping makes the specimen evenly stressed and prevents clamping deviation.

[0028] In a further optimized design, a support 16 is installed on the side wall of the positioning platform 4, and a swing arm 17 is rotatably connected to the support 16. A pressure block is fixed on the swing arm 17, and the pressure block is arranged correspondingly to the top surface of the positioning platform 4. A spring is fixed to the other end of the swing arm 17, and one end of the spring is fixed to the support 16.

[0029] Support 16 is fixed to the side wall of positioning platform 4. Swing arm 17 can rotate freely around support 16. Spring applies elastic tension to swing arm 17, driving swing arm 17 to drive pressure block to press down on the top surface of the specimen. Relying on the elastic deformation of spring, it adapts to fit erosion-thinned specimens of different thicknesses and irregular surfaces. Combined with the lateral clamping mechanism, it forms a two-way limit, effectively preventing vertical movement and tilting of the specimen during rotation and testing, and improving clamping stability.

[0030] The scheme is further optimized. The positioning mechanism includes a positioning block 18. A vertical groove is provided at the bottom of the installation position of the support platform 2. The positioning block 18 is slidably connected in the vertical groove. A first wedge 19 is fixedly connected to one end of the positioning block 18. A telescopic rod is fixedly connected to the bottom of the vertical groove. A compression spring is sleeved on the telescopic rod. The top of the telescopic rod slides in cooperation with the bottom surface of the first wedge 19. A support block is fixed to the bottom of the vertical groove. A slider is horizontally slidably connected to the top surface of the support block. A second wedge 20 is fixed to one end of the slider. The inclined surfaces of the first wedge 19 and the second wedge 20 abut against each other. A push block 21 is fixed to the other end of the slider. A spring is fixed between the push block 21 and one side of the support platform 2. An adjusting bolt is installed on the support platform 2. The adjusting bolt is threadedly connected to the support platform 2. The adjusting bolt passes through the spring.

[0031] Tightening the adjusting bolt pushes the push block 21 and the slider to slide horizontally along the support block. The second wedge block 20 moves synchronously with the slider. Through the inclined plane cooperation, the first wedge block 19 is driven to descend vertically, causing the positioning block 18 to move down along the vertical slide groove and leave the positioning notch 5 of the ring plate 6. The telescopic rod and the compression spring provide vertical support and thrust for the first wedge block 19. When the adjusting bolt is loosened, the spring resets and drives all components to return to their positions. The positioning block 18 is inserted into the notch. The structure has strong self-locking properties and is firmly locked without shaking.

[0032] To further optimize the design, a fixing block is fixed at the bottom of the positioning stage 4.

[0033] The fixing block and the positioning stage 4 form an integrated load-bearing structure, which increases the bottom support area of ​​the specimen, disperses the clamping and testing load, and avoids plastic deformation of the thin-walled erosion-thinned specimen due to local stress. At the same time, the fixing block can limit the bottom displacement of the specimen. Together with the lateral clamping and vertical pressing structure, a three-dimensional limiting system is constructed to further enhance the positioning accuracy and structural stability of the specimen clamping.

[0034] Further optimization of the scheme: the visual acquisition system includes a mounting base and visual acquisition cameras. The mounting base is fixedly connected to the top surface of the base 1. Several sets of visual acquisition cameras are set, and the sets of visual acquisition cameras are respectively installed on the mounting base.

[0035] The mounting base is fixed to the top surface of the base 1 as the mounting carrier. Multiple sets of visual acquisition cameras are distributed to synchronously acquire image information of the specimen surface, measuring point position and clamping status from different angles and transmit it to the control system in real time. The multi-camera collaborative acquisition eliminates visual blind spots, accurately identifies specimen position deviations, provides visual data support for rotation adjustment and hardness testing, realizes automated and accurate alignment, and reduces manual alignment errors.

[0036] The design was further optimized by adding scale lines to the outer contour of the installation positions on the annular plate 6 and the support platform 2.

[0037] The annular plate 6 rotates synchronously with the mounting plate 3, and its scale line forms a relative reference with the fixed scale line of the support platform 2. The operator can intuitively read the circumferential rotation angle of the mounting plate 3 and the specimen. With the locking function of the positioning mechanism, the angle can be quantitatively adjusted and accurately positioned, and the detection angle benchmark of multiple measuring points and multiple specimens can be unified, improving the consistency and repeatability of the test data and facilitating standardized testing operations.

[0038] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0039] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A clamping and positioning device for measuring erosion-thinned specimens, characterized in that, include: Base (1), which is clamped and fixed on a three-axis worktable; Support platform (2), the support platform (2) is vertically fixedly connected to the base (1), the support platform (2) has a circular installation station, the axis of the installation station is arranged parallel to the top surface of the base (1), the installation station is rotatably connected to the installation plate (3), the top of the support platform (2) is equipped with a rotary transmission assembly, the rotary transmission assembly is in transmission cooperation with the installation plate (3); Positioning platform (4), which is fixedly connected to the mounting plate (3); The clamping mechanism is provided in two sets, and the two sets of clamping mechanisms are symmetrically arranged on the mounting plate (3), and the clamping mechanism and the positioning table (4) are arranged on the side away from the mounting plate (3). The positioning mechanism is installed on the support platform (2), and an annular plate (6) is installed on the front side of the mounting plate (3). A positioning notch (5) is provided on the annular plate (6), and the positioning notch (5) is in a limiting fit with the positioning mechanism. A visual acquisition system is installed on the front part of the top surface of the base (1), and the visual acquisition system is arranged correspondingly to the positioning platform (4); A control system is used to control the operation of the overall device.

2. The clamping and positioning device for measuring erosion-thinned specimens according to claim 1, characterized in that, The rotary transmission assembly includes a drive motor fixedly connected to the support platform (2), the output shaft of the drive motor is fixedly connected to a drive gear, and the outer wall of the mounting plate (3) is provided with a toothed groove, and the drive gear meshes with the toothed groove.

3. The clamping and positioning device for measuring erosion-thinned specimens according to claim 1, characterized in that, The clamping mechanism includes a mounting block (7), two sets of which are symmetrically fixed on the side wall of the positioning platform (4). A connecting rod assembly (8) is mounted on the mounting block (7), and a claw head (9) is hinged to one end of the connecting rod assembly (8). The claw head (9) is rotatably connected to the mounting block (7). The positioning platform (4) is fixed to the mounting plate (3) by two sets of support columns (10) symmetrically fixed to the mounting plate (3). A horizontal plate (11) is fixedly connected to the rear end of the two sets of support columns (10). 11) A sliding rod (12) is slidably connected to the upper part. One end of the sliding rod (12) is fixedly connected to a connector (13). The connector (13) is rotatably connected to the connecting rod assembly (8). A spring is sleeved on the sliding rod (12). The other end of the spring abuts against the horizontal plate (11) and the other end abuts against the connector (13). A pad (14) is fixedly connected to the other end of the sliding rod (12). A hydraulic push rod (15) is fixedly connected to the horizontal plate (11). The hydraulic push rod (15) is fixedly connected to the pad (14).

4. The clamping and positioning device for measuring erosion-thinned specimens according to claim 1, characterized in that, A support (16) is installed on the side wall of the positioning platform (4). A swing arm (17) is rotatably connected to the support (16). A pressure block is fixed on the swing arm (17). The pressure block is arranged corresponding to the top surface of the positioning platform (4). A spring is fixed at the other end of the swing arm (17). One end of the spring is fixed to the support (16).

5. The clamping and positioning device for measuring erosion-thinned specimens according to claim 1, characterized in that, The positioning mechanism includes a positioning block (18). A vertical groove is provided at the bottom of the installation position of the support platform (2). The positioning block (18) is slidably connected in the vertical groove. A first wedge (19) is fixedly connected to one end of the positioning block (18). A telescopic rod is fixedly connected to the bottom of the vertical groove. A compression spring is sleeved on the telescopic rod. The top end of the telescopic rod slides in cooperation with the bottom surface of the first wedge (19). A support block is fixed to the bottom of the vertical groove. A slider is horizontally slidably connected to the top surface of the support block. A second wedge (20) is fixed to one end of the slider. The inclined surfaces of the first wedge (19) and the second wedge (20) abut against each other. A push block (21) is fixed to the other end of the slider. A spring is fixed between the push block (21) and one side of the support platform (2). An adjusting bolt is installed on the support platform (2). The adjusting bolt is threadedly connected to the support platform (2). The adjusting bolt passes through the spring.

6. The clamping and positioning device for measuring erosion-thinned specimens according to claim 1, characterized in that, A fixing block is fixed at the bottom of the positioning platform (4).

7. The clamping and positioning device for measuring erosion-thinned specimens according to claim 1, characterized in that, The visual acquisition system includes a mounting base and visual acquisition cameras. The mounting base is fixedly connected to the top surface of the base (1). Several sets of visual acquisition cameras are provided, and the several sets of visual acquisition cameras are respectively installed on the mounting base.

8. The clamping and positioning device for measuring erosion-thinned specimens according to claim 1, characterized in that, The annular plate (6) and the outer contour of the installation station of the support platform (2) are respectively provided with scale lines.

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