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CN-224202917-U - Servo tension and compression testing device

CN224202917UCN 224202917 UCN224202917 UCN 224202917UCN-224202917-U

Abstract

The utility model relates to the technical field of pulling and pressing test machines and discloses a servo pulling and pressing test device which comprises a support, an execution unit fixedly arranged on the support, a pulling and pressing sensor arranged on an output shaft of the execution unit and used for extruding/stretching a tested workpiece, a deformation detection structure respectively arranged on the pulling and pressing sensor and the support, and a deformation detection structure used for detecting axial deformation of the pulling and pressing sensor and the support along the axial direction when the pulling and pressing test device stretches/extrudes the workpiece, wherein the deformation detection structure is used for detecting micro deformation of the pulling and pressing sensor and the support by utilizing the displacement of a sliding block along a grating ruler and used for eliminating problems caused by the deformation in the pulling and pressing test so as to improve the accuracy of the test device.

Inventors

  • XU CHAO

Assignees

  • 艾迅(常州)传动科技有限公司

Dates

Publication Date
20260505
Application Date
20250606

Claims (4)

  1. 1. A servo tension and compression testing device, comprising: a bracket (100); the execution unit (300) is fixedly arranged on the bracket (100); The pulling and pressing sensor (302) is arranged on an output shaft (301) of the execution unit (300) and is used for extruding/stretching a tested workpiece, and the tested workpiece is fixedly arranged at the lower part of the bracket (100); the deformation detection structure (400) is respectively arranged on the tension and compression sensor (302) and the bracket (100), and is used for detecting axial deformation of the tension and compression sensor (302) and the bracket (100) along the axial direction when the tension and compression testing device stretches/extrudes a workpiece.
  2. 2. The servo tension and compression testing device according to claim 1, wherein the support (100) comprises a bottom frame (101) fixedly arranged on a table top, a support frame (102) is fixedly connected to the upper surface of the bottom frame (101), a mounting frame (103) is fixedly arranged at the upper position of the support frame (102), and the execution unit (300) is fixed on the mounting frame (103).
  3. 3. The servo tension and compression testing device according to claim 2, wherein the deformation detection structure (400) comprises a grating ruler (401), the grating ruler (401) is fixedly arranged on the side wall of the support frame (102), a sliding block (402) is further arranged on the grating ruler (401) in a sliding mode, and a connecting rod (403) is further arranged between the sliding block (402) and the tension and compression sensor (302) so that the tension and compression sensor (302) moves synchronously with the sliding block (402).
  4. 4. The servo tension and compression testing device as set forth in claim 2, wherein the tension and compression sensor (302) further comprises an output interface (303) disposed at a side edge thereof, the controller (200) is further fixed on an outer side wall of the support frame (102), the output interface (303) is electrically connected with the controller (200), and the controller (200) is electrically connected with the execution unit (300) in the same way.

Description

Servo tension and compression testing device Technical Field The utility model relates to the technical field of tensile and compression testing machines, in particular to a servo tensile and compression testing device. Background The tension-compression tester (pneumatic type) is a mechanical detection device which takes a servo cylinder (an execution unit) as a core power source, and realizes the accurate application of a tensile load or a compression load by pneumatically driving a piston to reciprocate, and the system consists of the servo cylinder, a pressure sensor, a gas circuit control valve and a PLC/controller, can set a target force value in a closed-loop control mode and supports constant-speed loading or pressure maintaining test. In an actual tension and compression test, the tester itself generates a certain amount of deformation, which can reduce the measurement accuracy of the workpiece, and therefore, the applicant designs a structure capable of detecting the deformation of the tester itself, and the structure is arranged on a part which is often deformed, so that the accuracy of the test device is improved. Disclosure of utility model The utility model aims to provide a servo tension and compression testing device which solves the technical problems. The utility model provides the following technical scheme: a servo tension and compression testing device, comprising: A bracket; The execution unit is fixedly arranged on the bracket; The pulling and pressing sensor is arranged on an output shaft of the execution unit and used for extruding/stretching a tested workpiece, and the tested workpiece is fixedly arranged at the lower part of the bracket; The deformation detection structure is respectively arranged on the tension and compression sensor and the support, and is used for detecting axial deformation of the tension and compression sensor and the support along the axial direction when the tension and compression testing device stretches/extrudes a workpiece. As the optimization of the technical scheme, the support comprises a bottom frame fixedly arranged on the table top, the upper surface of the bottom frame is fixedly connected with a support frame, and an installation frame is fixedly arranged at the upper position of the support frame, wherein the execution unit is fixed on the installation frame. As the preference of above-mentioned technical scheme, deformation detection structure includes the grating chi, grating chi fixed mounting is on the support frame lateral wall, still slide on the grating chi and be provided with the slider, still be provided with the connecting rod between slider and the tension and compression sensor for tension and compression sensor moves along with the slider synchronization. As the optimization of the technical scheme, the tension and compression sensor is further provided with an output interface arranged on the side edge of the tension and compression sensor, a controller is further fixed on the lateral wall of the outer side of the support frame, the output interface is electrically connected with the controller, and the controller is electrically connected with the execution unit. Compared with the prior art, the utility model has the beneficial effects that: 1. In the utility model, by arranging the deformation detection structure, the displacement of the sliding block along the grating ruler is utilized to detect the micro deformation of the tension-compression sensor and the bracket, so that the problems caused by the deformation in tension-compression test are eliminated, and the accuracy of the testing device is improved. 2. In the utility model, the output interface is arranged on the tension and compression sensor and is used for inputting a pressure signal into the controller, and the controller is used for controlling the tension or compression load of the execution unit to form a servo closed loop. Drawings FIG. 1 is a schematic perspective view of the present utility model; FIG. 2 is a schematic diagram of the overall structure of a deformation detecting structure; FIG. 3 is a schematic diagram of a three-dimensional structure of the testing device for tensile testing of a workpiece; FIG. 4 is a schematic diagram of a three-dimensional structure of the test device for performing extrusion test on a workpiece; FIG. 5 is a schematic diagram of a closed loop servo loop of the stretch sensor, controller and execution unit; 100 parts of a bracket, 101 parts of a chassis, 102 parts of a supporting frame, 103 parts of a mounting frame; 200. A controller; 300. An execution unit; 301, an output shaft, 302, a tension and compression sensor, 303, an output interface; 400. The device comprises a deformation detection structure, a grating ruler, a sliding block, a connecting rod and a sliding block. Detailed Description The following description of the embodiments of the present utility model will be made clearly and completely with reference to th