Search

CN-121994596-A - Mechanical property integrated detection equipment and system for new deformable material parts

CN121994596ACN 121994596 ACN121994596 ACN 121994596ACN-121994596-A

Abstract

The invention relates to the technical field of material mechanical property detection, and discloses mechanical property integrated detection equipment and system for new material parts easy to deform. The correcting component is arranged on the placing table in a radial mode, six groups of miniature linear modules and L-shaped poking fingers with miniature force sensors are arranged on the placing table, and the detecting component integrates a vision system and a testing pressure head in sliding connection. The system utilizes visual positioning and force feedback, and the control module is independently fed to flatten the part. The invention realizes the automatic flattening and consistent positioning of the easily deformable parts by matching the radial correction mechanism with the sapphire plate, avoids the damage of the sample in correction by utilizing a double feedback mechanism, effectively isolates the driving inertial impact by combining a floating pressure head structure, and effectively improves the precision and the data reliability of the detection of the new material micro force value.

Inventors

  • WU YONGZHONG

Assignees

  • 苏州科技大学

Dates

Publication Date
20260508
Application Date
20260209

Claims (10)

  1. 1. The utility model provides a mechanical properties integration check out test set of flexible new material part, includes casing (1), its characterized in that, casing (1) middle part is provided with operating panel (2), casing (1) middle part is provided with display screen (3), casing (1) inside is provided with the PLC controller, the PLC controller with operating panel (2) display screen (3) are through electric connection respectively, casing (1) inboard is provided with backlight (5), casing (1) inboard is provided with accurate alignment platform (12), accurate alignment platform (12) top is provided with correction subassembly, casing (1) inboard is provided with detection subassembly; The correcting assembly comprises a placing table (13), the placing table (13) is arranged at the top of the precise alignment platform (12), six groups of miniature linear modules (14) are arranged at the top of the placing table (13), the six groups of miniature linear modules (14) are distributed radially at the top of the placing table (13), the output end of the miniature linear modules (14) is fixedly connected with an L-shaped poking finger (15), a miniature force sensor is arranged on the surface of the L-shaped poking finger (15), and a sapphire plate (16) is fixedly connected to the middle of the placing table (13).
  2. 2. The mechanical property integrated detection device for the new material parts easy to deform according to claim 1, wherein the detection assembly comprises a mechanical loading main shaft (6), the mechanical loading main shaft (6) is arranged at the top of the inner side of the shell (1), a main camera (7) and a 3D profile scanner (8) are arranged in the middle of the mechanical loading main shaft (6), one end of the mechanical loading main shaft (6) far away from the inner side of the shell (1) is slidably connected with a test pressure head (10), a sliding groove (11) is formed in the middle of the mechanical loading main shaft (6), the test pressure head (10) is slidably connected in the middle of the sliding groove (11), a pressure sensor (9) is arranged in the middle of the mechanical loading main shaft (6), the pressure sensor (9) is arranged at the top of the test pressure head (10), and the top surface of the test pressure head (10) is in contact with the sensing surface of the pressure sensor (9).
  3. 3. The mechanical property integrated detection device for the new deformable material parts according to claim 1, wherein a motor is arranged at the top of the precise alignment platform (12), the output end of the motor is fixedly connected to the bottom of the placement table (13), the precise alignment platform (12) and the motor are respectively and electrically connected with the PLC, and a protective door (4) is arranged in the middle of the shell (1).
  4. 4. The mechanical property integrated detection device for the new material part easy to deform according to claim 1, wherein the miniature linear module (14), the miniature force sensor, the mechanical loading main shaft (6), the main camera (7), the 3D profile scanner (8) and the pressure sensor (9) are respectively and electrically connected with the PLC controller.
  5. 5. Mechanical property integrated detection system of easy deformation new material part, characterized in that is applied to the mechanical property integrated detection equipment of easy deformation new material part of any one of claims 1-4, includes: the form recognition and positioning module is used for controlling the backlight lamp (5) to be started, controlling the main camera (7) to acquire an initial image of a part placed on the sapphire plate (16), and calculating deviation data of the geometric center of the part and the center of the precise alignment platform (12); The self-adaptive correction module is used for analyzing the curling deformation of the edge of the part according to the initial image and independently calculating the feeding distance of six groups of miniature linear modules (14); And the mechanical data acquisition and analysis module is used for controlling the mechanical loading main shaft (6) to execute a test action and synchronously acquiring force value data fed back by the pressure sensor (9) and displacement data of the mechanical loading main shaft (6).
  6. 6. The integrated mechanical property detection system of a new deformable material part of claim 5, wherein the adaptive correction module performs the steps of: establishing a standard contour model of a part, carrying out edge extraction processing on the initial image to obtain a real-time contour, and registering the real-time contour with the standard contour model; Calculating radial deviation vectors of the positions of the six L-shaped shifting fingers (15); When the radial deviation vector of the target azimuth is detected to point to the center of the placement table (13), a corresponding driving signal is generated to control the miniature linear module (14) of the target azimuth to drive the L-shaped poking finger (15) to move outwards along the radiation direction until the radial deviation vector of the target azimuth is within a tolerance range.
  7. 7. The integrated detection system for mechanical properties of new deformable material parts according to claim 6, characterized in that said adaptive correction module monitors the feedback value of said miniature force sensor in real time during the movement of said miniature linear module (14); when the feedback value of the miniature force sensor reaches a force value threshold value, or the main camera (7) detects that the edge profile of the part is subjected to stretching deformation, the self-adaptive correction module controls the corresponding miniature linear module (14) to stop moving and keep the current position.
  8. 8. The integrated mechanical property detection system of a new deformable material part of claim 5, wherein the mechanical data collection analysis module performs the steps of: After the self-adaptive correction module finishes the correction action, the mechanical loading main shaft (6) is controlled to drive the test pressure head (10) to press downwards, the test pressure head (10) contacts a target to be tested, and the test pressure head (10) moves upwards along the direction of the sliding groove (11) and contacts the sensing surface of the pressure sensor (9); Synchronously recording a time stamp, the axial displacement of the mechanical loading spindle (6) and the force value variation of the pressure sensor (9) according to the sampling frequency; and drawing a stress-strain curve according to the recorded data, and calculating the elastic modulus and the yield strength of the material.
  9. 9. The integrated mechanical property detection system of a new part subject to deformation of claim 8, further performing a three-dimensional topography compensation step comprising: before the test press head (10) executes the pressing action, the 3D profile scanner (8) is controlled to scan the corrected part surface to obtain flatness data of the part surface; Calculating a correction coefficient of the effective contact area according to the flatness data; And carrying out weighted compensation on the force value data acquired by the pressure sensor (9) by utilizing the correction coefficient to generate a final mechanical property detection report.
  10. 10. The integrated detection system for mechanical properties of a new part with easy deformation according to claim 5, further comprising a data storage unit, wherein the data storage unit is used for binding and storing the image data and the mechanical data detected each time; the display screen (3) is used for displaying the correction process image shot by the main camera (7), the real-time stress state of the miniature force sensor and the mechanical property curve generated by testing in real time.

Description

Mechanical property integrated detection equipment and system for new deformable material parts Technical Field The invention relates to the technical field of mechanical property detection of materials, in particular to mechanical property integrated detection equipment and system for new material parts easy to deform. Background With the development of material science, various flexible electronic materials, biomedical films, nano composite materials and other easily deformable new materials are widely applied in industry. The material has the characteristics of thin thickness, low rigidity and complex surface microstructure, and the accurate detection of the mechanical property of the material is a key link of product research and development and quality control. The existing universal mechanical testing machine has obvious limitations in testing the materials easy to deform. Because the materials are easy to curl, fold or irregularly warp under the natural placing state, the materials cannot keep a standard plane state like a hard metal sample. Before testing, an operator is usually required to manually flatten and fix the sample, so that the manual operation is low in efficiency, the pretightening force of clamping each time is difficult to be ensured to be consistent, the geometrical boundary conditions of the sample during testing are different, and the repeatability and accuracy of test data are seriously affected. In terms of mechanical loading structure, the traditional detection equipment adopts a servo motor to directly drive a loading main shaft and a sensor to perform a downward-pressing test through a screw rod. The rigid connection structure can generate additional impact force at the moment of contacting the sample due to the motion inertia of the driving component and the main shaft. For hard materials with higher bearing force values, the inertia effect is negligible, but for soft new materials with micro-or milli-bovine range, the initial impact often introduces measurement noise, even covers the real elastic response of the materials in the early stage of yield, and causes the calculation of key indexes such as elastic modulus and the like to deviate. In addition, to solve the problem of sample curl, some specialized equipment attempts to stretch and flatten the sample using mechanical clamps. However, most existing flattening mechanisms lack a fine force sense monitoring and feedback mechanism, and simply rely on displacement control to stretch the sample. For fragile ultrathin materials or brittle films, once the flattening force is improperly controlled, the edges of the sample are easily torn, overstretched or irreversibly plastically deformed before the initiation of the official test, resulting in scrapping of the sample, which is an unacceptable loss for preparing new material samples at high cost. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the mechanical property integrated detection equipment and the mechanical property integrated detection system for the parts with the new materials easy to deform, and solves the problems that in the prior art, the parts with the new materials easy to deform are difficult to precisely position due to material curling, samples are easy to damage due to contact flattening operation, and the elastic modulus calculation data is inaccurate due to the surface microscopic morphology difference. The invention provides mechanical property integrated detection equipment for a new material part easy to deform, which comprises a shell, wherein an operation panel and a display screen are arranged in the middle of the shell, a PLC (programmable logic controller) is arranged in the shell and is respectively and electrically connected with the operation panel and the display screen; the correcting assembly comprises a placing table, a miniature linear module, L-shaped poking fingers and sapphire plates, wherein the placing table is arranged at the top of the precise alignment platform, six groups of miniature linear modules are arranged at the top of the placing table and are distributed radially, the output ends of the miniature linear modules are fixedly connected with the L-shaped poking fingers, miniature force sensors are arranged on the surfaces of the L-shaped poking fingers, and the sapphire plates are fixedly connected with the middle of the placing table. The detection assembly comprises a mechanical loading main shaft, a main camera, a 3D profile scanner, a pressure sensor and a test pressure head, wherein the mechanical loading main shaft is arranged at the top of the inner side of the shell and is used for providing loading driving force in the vertical direction, the main camera and the 3D profile scanner are arranged in the middle of the mechanical loading main shaft and are used for acquiring plane profile and three-dimensional shape data of a sample, the test pressure head is slidably connected to o