CN-122016507-A - Sample clamping and tension synchronous control device and method for thermal simulation experiment

CN122016507ACN 122016507 ACN122016507 ACN 122016507ACN-122016507-A

Abstract

The invention belongs to the technical field of metal material thermal simulation test equipment, and particularly relates to a sample clamping and tension synchronous control device and method for a thermal simulation test, wherein the device comprises a clamping part I, a clamping part II, a hydraulic rod, a tension sliding table and a tension roller; clamping part one, clamping part two all include mounting panel, clamping jaw, preceding clamp splice, back clamp splice, fixedly connected with clamping jaw, preceding clamp splice on the mounting panel, are equipped with back clamp splice between clamping jaw and the preceding clamp splice, are connected with the driving piece on the clamping jaw, and the output and the back clamp splice of driving piece are connected, and the driving piece drives back clamp splice and keeps away from or be close to preceding clamp splice for the centre gripping test sample. The invention realizes the accurate cooperative control of the clamping position and the tension of the sample.

Inventors

WANG YADONG
WEI JIANHUA
ZHOU HONGWEI
FU DONGHE
FU YUJING
YANG DECAO
GUO XIAOJING

Assignees

本钢板材股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260330

Claims (10)

1. A sample clamping and tension synchronous control device for a thermal simulation experiment is characterized by comprising a first clamping part, a second clamping part, a hydraulic rod, a tension sliding table and a tension roller, wherein the hydraulic rod is arranged between the first clamping part and the second clamping part, the hydraulic rod drives the first clamping part to be far away from or close to the second clamping part, the first clamping part and the second clamping part are arranged in a two-to-two mode, the tension sliding table is fixedly connected to the first clamping part and the second clamping part, the tension roller is connected with the tension sliding table, the first clamping part and the second clamping part comprise a mounting plate, clamping jaws, a front clamping block and a rear clamping block, the mounting plate is fixedly connected with the clamping jaws and the front clamping block, a rear clamping block is arranged between the clamping jaws and the front clamping block, a driving piece is connected to the clamping jaws, and the driving piece drives the rear clamping block to be far away from or close to the front clamping block so as to clamp a test sample.
2. The synchronous control device for clamping and tension of samples for thermal simulation experiments according to claim 1, wherein a plurality of groups of tiny tooth blocks which are distributed equidistantly are fixed on the opposite side of the front clamping block and the rear clamping block.
3. The synchronous control device for sample clamping and tension for thermal simulation experiments according to claim 1 is characterized in that a supporting plate is fixedly connected to a mounting plate of a second clamping part and used for being connected with a cylinder body of a hydraulic rod, and a pushing plate is fixedly connected to the mounting plate of the first clamping part and hinged to a piston rod of the hydraulic rod.
4. The synchronous control device for clamping and tension of samples for thermal simulation experiments according to claim 3, wherein a tension sensor is connected between the pushing plate and the piston rod.
5. The synchronous control device for clamping and tension of a sample for a thermal simulation experiment according to claim 1, wherein a piston rod of the hydraulic rod is connected with a position sensor.
6. The synchronous control device for clamping and tension of a sample for a thermal simulation experiment according to claim 1, wherein a plurality of groups of reinforcing ribs and reinforcing plates which are distributed at equal intervals are fixedly connected to one side, opposite to the clamping jaw, of the first clamping part and the second clamping part.
7. The synchronous control device for clamping and tension of a sample for a thermal simulation experiment according to claim 1, wherein the front clamping block is connected with a temperature sensor, and the sensing end of the temperature sensor is positioned on the same plane with the outer wall of the front clamping block.
8. The synchronous control device for sample clamping and tension for thermal simulation experiments according to claim 1, further comprising a proportional valve, a hydraulic pump and a connecting pipe, wherein the hydraulic rod is connected with the connecting pipe, the connecting pipe is connected with the proportional valve, the hydraulic pump is connected with the proportional valve through a pipeline, and a high-pressure switch and a pressure gauge are connected to the connecting pipe.
9. The synchronous control device for clamping and tension of a sample for a thermal simulation experiment according to claim 1, wherein the tension roller is fixedly connected with the tension sliding table of the first clamping part, the tension roller is slidably connected with the tension sliding table of the second clamping part, or the tension roller is slidably connected with the tension sliding table of the first clamping part, and the tension roller is fixedly connected with the tension sliding table of the second clamping part.
10. A method for synchronously controlling sample clamping and tension for thermal simulation experiments by using the device according to any one of claims 1 to 9, comprising the following steps: S1, one end of a sample is arranged between a front clamping block and a rear clamping block of a clamping part II, a driving piece is started to drive the rear clamping block to move towards the front clamping block, one end of the sample is clamped, and the other end of the sample is arranged between the front clamping block and the rear clamping block of the clamping part I; s2, starting a hydraulic rod to push a piston rod to shrink, so that the clamping part is driven to move towards the second clamping part until the other end of the sample is positioned at the clamping position of the first clamping part, and then driving the rear clamping block to move towards the front clamping block by a driving piece of the first clamping part to clamp the other end of the sample; S3, for a thermal simulation experiment requiring keeping the tension of the sample constant, detecting an actual tension value borne by the sample in real time by a tension sensor, controlling the flow and the pressure of hydraulic oil entering a hydraulic rod to obtain an initial tension value according to the difference value between the actual tension value and a target tension value, recording the displacement of a current piston rod by a position sensor, setting the position as a reference position, and then starting the thermal simulation experiment; S4, the sample is heated and cooled in the thermal simulation experiment process, and a position control mode is adopted to compensate the length change of the sample caused by thermal expansion or cooling shrinkage, so that the tension change of the sample is caused; The position control mode is that the displacement of the piston rod of the hydraulic rod is regulated according to the real-time tension value detected by the tension sensor in the experimental process, and the position sensor monitors the displacement of the piston rod of the hydraulic rod in real time; In a thermal simulation experiment, when a sample is heated and expanded, tension is reduced, real-time calculation is carried out according to the deviation between a real-time tension value and a set tension to obtain a real-time displacement, and a hydraulic rod drives a clamping part to move in a direction away from a clamping part II in real time to carry out real-time tension compensation; s5, after the thermal simulation experiment is finished and the sample is cooled to the room temperature, starting the driving piece of the first clamping part to drive the rear clamping block to move in the direction away from the front clamping block, releasing the clamping of the other end of the sample, and then starting the driving piece of the second clamping part to drive the rear clamping block to move in the direction away from the front clamping block, taking down the sample, and carrying out the thermal simulation experiment of the next process.

Description

Sample clamping and tension synchronous control device and method for thermal simulation experiment Technical Field The invention belongs to the technical field of metal material thermal simulation test equipment, and particularly relates to a sample clamping and tension synchronous control device and method for a thermal simulation test. Background The thermal simulation testing machine is a common device for researching the tissue performance in the field of metal materials, and can accurately reproduce the thermal cycle process in actual production or experimental research, so as to analyze the tissue evolution rule and performance change characteristics of the materials under different process parameters. The clamp for clamping the sample can ensure that the sample always maintains a stable clamping state and maintains constant tension when the water quenching treatment or the cooling mode is switched. The patent application number is CN201120448870.7, discloses a tensile clamp structure of panel that thermal simulation machine was used, including two pairs of grip blocks that bilateral symmetry set up, the grip block is the trapezoidal body that is the small cross section side towards test piece one side, is provided with toothed line on the grip face of opposite side in every pair of grip block, and the direction that toothed line set up is perpendicular with tensile application of force direction after the panel test piece is held. And pin holes vertically penetrate through each pair of clamping blocks. The patent application number is CN202510692190.6, discloses a sample clamp of a thermal simulation testing machine, a cooling device and an annealing test method, wherein the sample clamp consists of four identical wedge-shaped stainless steel clamping plates, two sample clamping plates are respectively clamped at two ends of a sample, and grooves are formed in the stainless steel clamping plates and used for reducing heat conduction. The test method comprises the steps of clamping a sample on a sample clamp, then placing the sample in a cavity of a thermal simulation tester, vacuumizing the cavity of the thermal simulation tester to form a protective atmosphere in the cavity, heating the sample to 950-1050 ℃ at 10-50 ℃ per second, preserving heat for 3-5 min, then quickly cooling the sample to room temperature by blowing, recording a temperature curve, stretching the annealed and simulated sample at room temperature, analyzing test data, and observing metallographic structures by an optical phase microscope. The existing clamping mechanism of the thermal simulation testing machine cannot effectively compensate tension changes of samples in the thermal cycle process, the defects are particularly prominent in the thermal simulation test of the phase-change steel plates, tension states in actual production of the phase-change steel plates cannot be reproduced accurately, and accuracy of test results is further affected. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide a synchronous control device and method for sample clamping and tension for thermal simulation experiments, so as to solve the problem that the conventional clamping mechanism cannot compensate the change of the sample tension in real time in the thermal cycle process. Through integrated hydraulic drive, tension slip table and sensor detection, realize the stability of sample centre gripping and the dynamic regulation of tension, ensure that sample tension is invariable in the experimentation to improve the accuracy of thermal simulation experiment. In order to achieve the above purpose, the present invention is realized by the following technical scheme: A synchronous control device for clamping and tension of a sample for a thermal simulation experiment comprises a first clamping part, a second clamping part, a hydraulic rod, a tension sliding table and a tension roller, wherein the hydraulic rod is arranged between the first clamping part and the second clamping part, drives the first clamping part to be far away from or close to the second clamping part, the first clamping part and the second clamping part are arranged oppositely, the tension sliding table is fixedly connected to the first clamping part and the second clamping part, the tension roller is connected with the tension sliding table, the first clamping part and the second clamping part comprise a mounting plate, clamping jaws, a front clamping block and a rear clamping block, the mounting plate is fixedly connected with the clamping jaws and the front clamping block, a rear clamping block is arranged between the clamping jaws and the front clamping block, a driving piece is connected to the clamping jaws, and the output end of the driving piece is connected with the rear clamping block and drives the rear clamping block to be far away from or close to the front clamping block so as to clamp a test sample. And a plural