CN114778323A - Full-automatic detection device and method for one-dimensional stroke expansion irradiation relaxation - Google Patents
Full-automatic detection device and method for one-dimensional stroke expansion irradiation relaxation Download PDFInfo
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Abstract
A full-automatic detection device and a method for one-dimensional stroke expansion irradiation relaxation belong to the field of irradiation relaxation characteristic measurement; the device comprises a guide rail assembly, a horizontal linear motion sliding block and a multifunctional device, wherein the guide rail assembly is fixedly arranged on the vibration isolation rack, and the horizontal linear motion sliding block is assembled on the guide rail assembly in a reciprocating manner; installing an irradiation relaxation assembly on the horizontal linear motion sliding block, installing an irradiation relaxation sample in the irradiation relaxation assembly, and fixedly installing a multifunctional device and a pressure measurement system on the vibration isolation rack in sequence, wherein the multifunctional device and the pressure measurement system are positioned above the irradiation relaxation assembly; the irradiation relaxation component is sequentially matched with the multifunctional device and the pressure measurement system to complete detection; the problem of full-automatic, high accuracy measurement of irradiation relaxation characteristic is solved.
Description
Technical Field
The invention belongs to the technical field of irradiation relaxation characteristic measurement, and particularly relates to a full-automatic irradiation relaxation detection device and method with a stroke expansion function.
Background
In the fields of nuclear industry and the like, the nuclear safety problem is always the focus of social attention at home and abroad, and influences the life and property safety of people, the sustainable development of environment and the stable operation of economy. In the service process of the structural member, creep deformation is generated under high temperature and radiation conditions, so that the internal stress of the material is reduced, and the phenomenon is called radiation relaxation. Radiation relaxation phenomena can lead to structural failure. In order to avoid this problem, it is necessary to grasp the rule of the radiation relaxation characteristics of the material and select a material with appropriate properties to manufacture the structural member. Measurement and study of the relaxation behavior of the structure material becomes particularly important.
At present, the research theory calculation on the performances of stress, rigidity and the like of the structural part is relatively more, but the test measurement and analysis on the relaxation characteristic of the structural part after being irradiated are few, so the development of the relaxation characteristic measurement work of the structural part after being irradiated has an extremely important significance.
The Zhang Shi Ye proposes a method for measuring the irradiation relaxation characteristic of a single spring piece and a method for measuring the relaxation condition of four grid clamping forces (Zhang Shi Ye. research on irradiation relaxation of the clamping force of a PWR fuel assembly positioning grid [ J ] nuclear power engineering, 1987(01): 17-23.). The irradiation relaxation measurement of a single spring piece adopts a clamp structure consisting of three layers of flat plates, so that the spring piece conforms to the real working condition as far as possible. The three layers of flat plates of the fixture are an upper plate, a middle plate and a lower plate respectively, the middle plate is provided with an elongated slot, and the slot width of the elongated slot corresponds to the size of grid cells of the grillwork; the spring leaf is clamped between the middle plate and the lower plate, and the spring wave crest protrudes from the middle plate groove; the spring pressing amount is adjusted through gaskets with different thicknesses between the middle plate and the upper plate; fixing the three flat plates by using bolts; thereby simulating the real stress state and boundary conditions. After a series of operation steps, the spring relaxation amount is calculated according to the spring force of the cold state and the radiation state. In the literature, four methods, namely irradiation in a small grid stack, measurement of fuel rod moving force and sliding force, measurement of grid cell friction force and measurement of grid cell geometric dimension, are adopted for measurement of grid clamping force relaxation. In summary, the technical solution proposed in this document has the following features: (1) the four measurement methods for the relaxation situation of the clamping force of the lattice frame are all relaxation characteristic measurement aiming at the integral structure of the lattice frame, and the measurement of the relaxation characteristic of the material without specific structural characteristics cannot be realized; (2) the spring force is obtained by measuring and drawing spring load-displacement curves in different states, and the spring relaxation amount is further calculated. (3) The spring pressing amount is adjusted through gaskets with different thicknesses between the middle plate and the upper plate, the adjusting process is short, sudden change exists, and the spring piece sample and the measuring device are easily damaged. The technical scheme is difficult to realize the full-automatic and high-precision measurement effect of the irradiation relaxation characteristic.
Kenfield T.A. et al propose a method for measuring irradiation relaxation characteristics and design a measuring device (Kenfield T.A., Busbom H.J., Appleby W.K. In-reactor stress relaxation In binding of 20% cold-word 316 stationary steel [ J ]. North-Holland,1977, 65.). A plurality of two-point supporting two-point pressing structures are arranged in the device, so that the irradiation relaxation sample forms a beam bending model, the stress is calculated by utilizing the beam bending theory and the beam deflection, and then the relaxation conditions under different irradiation states are calculated and compared. According to the technical scheme, the measurement precision is limited, the space is limited, an external more precise device cannot be used for measuring the irradiation relaxation sample, and the full-automatic and high-precision measurement effect of the irradiation relaxation characteristic is difficult to realize.
One of the key to the measurement of the relaxation properties of a material is the measurement of the stresses within the material. In the internal stress measurement process, the stress of a material sample and the deformation or displacement generated by the stress need to be measured with high precision. This covers the measurement of the relationship between the force applied by the force measuring device to the material sample and the stroke over which the device pushes the ram. For a more precise description of the relationship, it is desirable to have a longer stroke under the same force conditions. The process is difficult to realize in a full-automatic way, and a full-automatic and high-precision irradiation relaxation characteristic measurement solution is not available at present.
In conclusion, the existing research is difficult to realize full-automatic and high-precision measurement of irradiation relaxation characteristics. Therefore, it is necessary to provide a fully automatic and high-precision irradiation relaxation measurement device and method to meet the requirement of our country in the field of precision measurement of material irradiation relaxation characteristics.
Disclosure of Invention
The invention aims to provide a full-automatic detection device and method for one-dimensional stroke expansion irradiation relaxation aiming at the problems in the prior art, so as to realize full-automatic and high-precision measurement of irradiation relaxation characteristics.
The purpose of the invention is realized as follows:
the full-automatic detection device for the one-dimensional stroke expansion irradiation relaxation comprises a guide rail assembly, a horizontal linear motion sliding block and a multifunctional device, wherein the guide rail assembly is fixedly arranged on a vibration isolation rack, and the horizontal linear motion sliding block is assembled on the guide rail assembly in a reciprocating manner; the vibration isolation rack is formed by assembling a high-flatness platform plate, a high-strength bracket and a high-performance vibration isolator, wherein the high-performance vibration isolator is supported and installed on the upper end part of the high-strength bracket, and the high-flatness platform plate is installed on the upper end part of the high-performance vibration isolator; the vibration isolation platform is characterized in that an irradiation relaxation assembly is arranged on the horizontal linear motion sliding block, an irradiation relaxation sample is arranged inside the irradiation relaxation assembly, a multifunctional device and a pressure measurement system are fixedly arranged on the vibration isolation platform in sequence, and the multifunctional device and the pressure measurement system are located above the irradiation relaxation assembly.
The full-automatic detection method of one-dimensional stroke expansion irradiation relaxation comprises the following steps:
step 1, fixedly mounting an irradiation relaxation assembly on a horizontal linear motion sliding block, driving the irradiation relaxation assembly to move to a multifunctional device together by the horizontal linear motion sliding block on a guide rail assembly, and detaching the irradiation relaxation assembly by the multifunctional device to expose an irradiation relaxation sample;
A. the precise linear motion slide rail drives the pressure measuring mechanism to descend, the precise pressure head is gradually close to the irradiation relaxation sample, the elongation of the precise tension spring generated by hanging the vertical linear motion slide block is fixed, and the displacement, stress and stretching condition of the precise tension spring in the pressure measuring mechanism are analyzed in the process;
B. the precise linear motion slide rail drives the pressure measuring mechanism to continuously descend, the precise pressure head is in virtual contact with the irradiation relaxation sample, the sample is about to change from a two-point support two-point pressing state into a two-point support four-point pressing state, the precise tension spring is about to retract, the elongation is about to decrease, and the displacement, stress and stretching conditions of the precise pressure head are analyzed in the process;
C. the precise linear motion slide rail drives the pressure measuring mechanism to continuously descend, and when the precise pressure head presses the irradiation relaxation sample to enable the irradiation relaxation sample to be in a state of pressing down four points of two-point support, the displacement, stress and stretching condition of the precise tension spring of the precise pressure head are analyzed;
D. the precise linear motion slide rail drives the pressure measuring mechanism to continuously descend, the pressure measuring mechanism stops descending when the maximum internal stress of the irradiation relaxation sample is not more than the yield strength of the irradiation relaxation sample, the irradiation relaxation sample is changed from a two-point support four-point pressing state into a new two-point support two-point pressing state in the process, and the displacement, the stress and the stretching condition of a precise tension spring of the precise pressure head are analyzed;
E. b, the precise linear motion slide rail drives the pressure measuring mechanism to rise and restore to the state before the step A, and the displacement, stress and stretching conditions of the precise pressure head are analyzed in the process;
F. calculating the internal stress change condition of the irradiation relaxation sample according to the displacement, stress and tension condition of the precision pressure head, and calculating the maximum internal stress value when the irradiation relaxation sample is changed from a four-point pressing state of two-point support to a new two-point pressing state of two-point support, namely calculating the irradiation relaxation amount of the sample under different irradiation conditions;
step 3, driving the irradiation relaxation assembly to move to a multi-function device together by a horizontal linear motion sliding block on the guide rail assembly, and reassembling the irradiation relaxation assembly by the multi-function device;
and 4, driving the irradiation relaxation assembly to move to the position before the step 1 on the guide rail assembly together by the horizontal linear motion sliding block, taking the irradiation relaxation assembly off from the horizontal linear motion sliding block, and completing the stroke expansion irradiation relaxation detection of the irradiation relaxation sample.
The device and the method for detecting the irradiation relaxation of the stroke extension have the following advantages that:
(1) the invention can realize the full-automatic detection of the irradiation relaxation characteristic of the material. The prior irradiation relaxation detection device and method can not solve the full-automatic detection problem of the irradiation relaxation characteristic of the material; the invention provides a full-automatic detection solution for the irradiation relaxation characteristics based on the principle of a stress method, which is used for fully automatically measuring the maximum internal stress of an irradiation relaxation sample in a specific bending state and finally obtaining the relaxation characteristics of the irradiation relaxation sample under different irradiation conditions; the problem that the prior art cannot solve the full-automatic detection of the irradiation relaxation characteristic of the material is solved. This is one of the innovative points of the present invention from the prior art.
(2) The invention provides a solution for measuring the stroke extension high-precision irradiation relaxation, which improves the precision of the measurement result. By carrying out stroke extension on the solution for measuring the irradiation relaxation, the number of measured points collected by the force measuring system is greatly increased in the process that the irradiation relaxation sample is changed from a state of pressing down four points of two-point support into a new state of pressing down two points of two-point support in the box body, so that the accuracy of data processing is improved, and the accuracy, the repeatability, the stability and the like of measurement are improved. This is the second innovation point of the present invention from the prior art.
Drawings
FIG. 1 is a schematic view of the overall structure of a full-automatic detection device for one-dimensional stroke expansion irradiation relaxation;
FIG. 2 is a schematic diagram of a pressure measurement system configuration;
FIG. 3 is a schematic view of a pressure measurement mechanism on a pressure measurement system;
FIG. 4 is a schematic view of a radiation relaxed assembly and a radiation relaxed sample configuration;
FIG. 5 is a schematic view of two-point support two-point depression of an irradiation relaxed sample;
figure 6 is a schematic illustration of the irradiation relaxed sample with a two point support four point hold down.
Reference numbers in the figures:
1. a vibration isolation rack; 1.1, a high-flatness platform plate; 1.2, a high-strength bracket; 1.3, a high-performance vibration isolator; 2. a guide rail assembly; 3. a pressure measurement system; 3.1, a system frame; 3.2, a precision linear motion sliding rail; 3.3, mounting a plate; 3.4, radiation shielding shell; 3.5, a pressure measuring mechanism; 3.5.1, a flat seat plate; 3.5.2, a precise tension spring; 3.5.3, a vertical linear motion slider; 3.5.4, high precision force sensor; 3.5.5, a precision pressure head; 3.5.6, a guide control column; 4. a multifunctional device; 5. a horizontal linear motion slider; 6. irradiating the relaxation assembly; 7. irradiating the relaxed sample; h. irradiating the relaxed sample thickness; l, irradiating the distance between the relaxed sample supporting points; A. the distance between the two ends of the precision pressure head; F. the precision indenter relaxes the pressure of the sample upon irradiation.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings.
Example 1
The full-automatic detection device for the one-dimensional stroke expansion irradiation relaxation comprises a guide rail component 2, a horizontal linear motion sliding block 5 and a multifunctional device 4, wherein the guide rail component 2 is fixedly arranged on a vibration isolation rack 1, and the horizontal linear motion sliding block 5 is arranged on the guide rail component 2 in a reciprocating manner; the vibration isolation rack 1 is formed by assembling a high-flatness platform plate 1.1, a high-strength bracket 1.2 and a high-performance vibration isolator 1.3, the high-performance vibration isolator 1.3 is supported and installed on the upper end part of the high-strength bracket 1.2, and the high-flatness platform plate 1.1 is installed on the upper end part of the high-performance vibration isolator 1.3; an irradiation relaxation component 6 is arranged on the horizontal linear motion sliding block 5, an irradiation relaxation sample 7 is arranged inside the irradiation relaxation component 6, a multifunctional device 4 and a pressure measurement system 3 are fixedly arranged on the vibration isolation rack 1 in sequence, and the multifunctional device 4 and the pressure measurement system 3 are located above the irradiation relaxation component 6.
The pressure measurement system 3 comprises a system frame 3.1, a precision linear motion slide rail 3.2, a mounting plate 3.3, a radiation shielding shell 3.4 and a pressure measurement mechanism 3.5; a precise linear motion sliding rail 3.2 is arranged on the system frame 3.1 in a manner of moving up and down along the vertical direction, a mounting plate 3.3 is fixedly arranged on the precise linear motion sliding rail 3.2, a pressure measuring mechanism 3.5 and a radiation shielding shell 3.4 are assembled at the lower end part of the mounting plate 3.3, and the radiation shielding shell 3.4 is positioned at the peripheral outer side part of the pressure measuring mechanism 3.5 to surround the pressure measuring mechanism 3.5; the pressure measuring mechanism 3.5 consists of a flat base plate 3.5.1, a precise tension spring 3.5.2, a vertical linear motion sliding block 3.5.3, a high-precision force sensor 3.5.4, a precise pressure head 3.5.5 and a guide control upright post 3.5.6; the flat seat plate 3.5.1 is fixedly arranged on the lower end part of the mounting plate 3.3, the guide control upright posts 3.5.6 are symmetrically arranged on the lower end part of the flat seat plate 3.5.1, the vertical linear motion slide block 3.5.3 is arranged on the positions between the guide control upright posts 3.5.6 which are symmetrically arranged, the precise tension spring 3.5.2 is arranged on the position between the lower part of the flat seat plate 3.5.1 and the upper part of the vertical linear motion slide block 3.5.3, the upper end and the lower end of the precise tension spring 3.5.2 are respectively and fixedly connected with the flat seat plate 3.5.1 and the vertical linear motion slide block 3.5.3, the vertical linear motion slide block 3.5.3 is elastically hung on the flat seat plate 3.5.1, the high-precision force sensor 3.5.4 is arranged on the lower end face of the vertical linear motion slide block 3.5.3, and the precise pressure head 3.5.5 is arranged on the lower end face of the high-precision force sensor 3.5.4.
Example 2
The full-automatic detection method of the one-dimensional stroke expansion irradiation relaxation comprises the following steps:
step 1, fixedly mounting an irradiation relaxation component 6 on a horizontal linear motion sliding block 5, driving the irradiation relaxation component 6 to move to a multifunctional device 4 together on a guide rail component 2 by the horizontal linear motion sliding block 5, and disassembling the irradiation relaxation component 6 by the multifunctional device 4 to expose an irradiation relaxation sample 7;
A. the precision linear motion slide rail 3.2 drives the pressure measuring mechanism 3.5 to descend, the precision pressure head 3.5.5 is gradually close to the irradiation relaxation sample 7, the extension amount of the precision tension spring 3.5.2 generated by the hanging vertical linear motion slide block is fixed, and the displacement and the stress of the precision pressure head 3.5.5 in the pressure measuring mechanism 3.5 and the stretching condition of the precision tension spring 3.5.2 are analyzed in the process;
B. the precision linear motion slide rail 3.2 drives the pressure measuring mechanism 3.5 to continuously descend, the precision pressure head 3.5.5 is in virtual contact with the irradiation relaxation sample 7, the sample is about to change from a two-point support two-point pressing state into a two-point support four-point pressing state, the precision tension spring 3.5.2 is about to retract, the elongation is about to decrease, and the displacement, stress and the stretching condition of the precision tension spring 3.5.5 are analyzed in the process;
C. the precision linear motion slide rail 3.2 drives the pressure measuring mechanism 3.5 to continuously descend, and when the precision pressure head 3.5.5 presses the irradiation relaxation sample 7 to enable the irradiation relaxation sample 7 to be in a state of pressing down by four supporting points at two points, the displacement and the stress of the precision pressure head 3.5.5 and the stretching condition of the precision tension spring 3.5.2 are analyzed;
D. the precise linear motion slide rail 3.2 drives the pressure measuring mechanism 3.5 to continuously descend, the pressure measuring mechanism 3.5 stops descending when the maximum internal stress of the irradiation relaxation sample 7 is not more than the yield strength of the irradiation relaxation sample, the irradiation relaxation sample 7 is changed from a two-point support four-point pressing state to a new two-point support two-point pressing state in the process, and the displacement, the stress and the stretching condition of the precise tension spring 3.5.2 of the precise pressure head 3.5.5 are analyzed;
E. the precision linear motion slide rail 3.2 drives the pressure measuring mechanism 3.5 to ascend, the state before the step A is recovered, and the displacement, the stress and the stretching condition of the precision tension spring 3.5.2 of the precision pressure head 3.5.5 are analyzed in the process;
F. according to the displacement and the stress of the precision pressure head 3.5.5 and the stretching condition of the precision tension spring 3.5.2, calculating the internal stress change condition of the irradiation relaxation sample 7, and calculating the maximum internal stress value when the irradiation relaxation sample 7 is changed from a two-point support four-point pressing state to a new two-point support two-point pressing state, namely calculating the irradiation relaxation amount of the sample under different irradiation conditions;
step 3, driving the irradiation relaxation component 6 to move to the multifunctional device 4 together on the guide rail component 2 by the horizontal linear motion sliding block 5, and reassembling the irradiation relaxation component 6 by the multifunctional device 4;
and 4, driving the irradiation relaxation assembly 6 to move to the position before the step 1 on the guide rail assembly 2 by the horizontal linear motion sliding block 5, taking the irradiation relaxation assembly 6 off the horizontal linear motion sliding block 5, and completing the stroke expansion irradiation relaxation detection of the irradiation relaxation sample 7.
In the detection, the displacement and stress of the precision pressure head are measured, and the precision tension spring 3.5.2 applies a vertical upward tension F to the vertical linear motion slide block 3.5.3 and the precision pressure head 3.5.5TThe precision indenter 3.5.5 applies a vertically upward holding force F to the irradiation relaxed sample 7 when coming into contact with the irradiation relaxed sample 7N(ii) a The precise pressure head 3.5.5 is stressed in a balanced manner in the process of vertical downward uniform linear motion, namely the gravity G is FT+FN(ii) a Due to FTPresence of (A) FNWill change with the change of the descending displacement of the precision pressure head 3.5.5, so the time required for the value measured by the high-precision force sensor 3.5.4 to change from 0 to G is longer, the movement stroke of the motor controlling the descending of the pressure measuring mechanism 3.5 is expanded; the pressure measurement system 3 is fixed for the collection frequency of the measured object, so that the number of the measured objects collected by the pressure measurement system 3 is greatly increased in the state change process of the irradiation relaxation sample 7 from the contact of the precision pressure head 3.5.5 with the irradiation relaxation sample 7 to the generation of the two-point support two-point pressing-two-point support four-point pressing-new two-point support two-point pressing in the box body 6.3, thereby realizing the improvement of the accuracy of data processing and further realizing the improvement of the accuracy, repeatability and stability of the measurement.
Calculating the maximum internal stress value when the irradiation relaxation sample is changed from a two-point support four-point pressing state into a new two-point support two-point pressing state in the box body, wherein the method comprises the following steps: obtaining the thickness h and the width b of the irradiation relaxation sample 7, the distance L between two supporting points, the distance A between two lower ends of the precision pressure head 3.5.5, the force value F measured by the high-precision force sensor 3.5.4, and the maximum internal stress value sigma which is 3F (A-L)/(bh)2) Wherein the unit of the thickness h, the width b, the distance L between the two supporting points and the distance A between the precision pressing heads is meter.
The explanation is as follows: as shown in fig. 5, when the irradiation relaxation sample 7 is placed in the box 6.3, there are four contact points with the box 6.3, the two points located at the left and right sides are called outer pressing points, and the two points located in the middle are called inner pressing points, and the irradiation relaxation sample 7 is subjected to four acting forces given to it by the box 6.3, and the four acting forces are called outer pressing force and inner pressing force respectively corresponding to the outer pressing points and the inner pressing points; after the precision indenter 3.5.5 descends and comes into contact with the irradiation relaxation sample 7, pressing down is continued, and the irradiation relaxation sample 7 becomes a two-point support four-point pressing-down state as shown in fig. 6 in the box body 6.3. The pressure of the precision pressure head 3.5.5 on the irradiation relaxation sample 7 is gradually increased, and the external pressure is gradually reduced; when the external pressing force becomes zero, the irradiation relaxation sample 7 and the external pressing point become virtual contact, and at this time, the position where the precision pressing head 3.5.5 and the irradiation relaxation sample 7 are in contact can be regarded as a new "external pressing point", so that the irradiation relaxation sample 7 is in a new two-point supporting two-point pressing state.
The method for calculating the relaxation amount of the irradiation relaxation sample 7 under a certain irradiation condition comprises the following steps:
step 1, obtaining a maximum internal stress value sigma when an irradiation relaxation sample 7 is changed from a two-point support four-point pressing state to a new two-point support two-point pressing state in a box body 6.3 under the condition that the irradiation relaxation sample is not irradiated at normal temperature0；
step 3, irradiating the relaxation sample 7 under certain irradiation condition to obtain relaxation amount eta ═ i (sigma-sigma)0)/σ0|×100％。
By adopting the embodiment, the detection of the radiation relaxation characteristic of the material can be realized, the radiation relaxation sample 7 is placed in the radiation relaxation component 6, the device is placed on the horizontal linear motion sliding block 5, the guide rail component 2 drives the device to respectively reach the multifunctional device 4 and the pressure measurement system 3, and the full-automatic detection of the radiation relaxation characteristic of the material is realized by utilizing the stress method principle; the maximum internal stress of the irradiation relaxation sample 7 in a specific bending state is measured, namely, the material is made into the irradiation relaxation sample 7 with a simple shape structure, so that the irradiation relaxation sample 7 forms a physical model similar to a beam in a two-point supporting and two-point pressing state, then the shape and stress of the model are quantitatively analyzed, further the maximum internal stress value of the irradiation relaxation sample 7 under different irradiation conditions is obtained, and finally the relaxation characteristics of the irradiation relaxation sample 7 under different irradiation conditions are obtained. The device and the method solve the problem that the prior art can not only detect the radiation relaxation characteristic of the material, can repeatedly use the radiation relaxation sample, achieve high accuracy, high repeatability and high stability, and realize high-precision detection of the radiation relaxation characteristic.
The invention improves the effectiveness and the accuracy of the measured data by reasonably designing the solution of the irradiation relaxation detection. The movement stroke of the motor for controlling the descending of the pressure measuring mechanism 3.5 is expanded, and the number of measured points collected by the pressure measuring system 3 is greatly increased in the state change process of 'two-point support two-point pressing-two-point support four-point pressing-new two-point support two-point pressing' of the irradiation relaxation sample 7 in the box body 6.3, so that the accuracy of data processing is improved, and the accuracy, repeatability and stability of measurement are improved.
Claims (3)
1. The full-automatic detection device for the one-dimensional stroke expansion irradiation relaxation comprises a guide rail assembly (2), a horizontal linear motion sliding block (5) and a multifunctional device (4), wherein the guide rail assembly (2) is fixedly arranged on a vibration isolation rack (1), and the horizontal linear motion sliding block (5) can be assembled on the guide rail assembly (2) in a reciprocating manner; the vibration isolation rack (1) is formed by assembling a high-flatness platform plate (1.1), a high-strength bracket (1.2) and a high-performance vibration isolator (1.3), the high-performance vibration isolator (1.3) is supported and installed on the upper end part of the high-strength bracket (1.2), and the high-flatness platform plate (1.1) is installed on the upper end part of the high-performance vibration isolator (1.3); the method is characterized in that: the vibration isolation platform is characterized in that an irradiation relaxation component (6) is arranged on the horizontal linear motion sliding block (5), an irradiation relaxation sample (7) is arranged inside the irradiation relaxation component (6), a multifunctional device (4) and a pressure measurement system (3) are sequentially and fixedly arranged on the vibration isolation rack (1), and the multifunctional device (4) and the pressure measurement system (3) are located above the irradiation relaxation component (6).
2. The full-automatic detection device for the one-dimensional stroke expansion irradiation relaxation according to claim 1, characterized in that: the pressure measurement system (3) comprises a system frame (3.1), a precise linear motion sliding rail (3.2), a mounting plate (3.3), a radiation shielding shell (3.4) and a pressure measurement mechanism (3.5); a precise linear motion sliding rail (3.2) is arranged on the system frame (3.1) in a vertically movable manner, the mounting plate (3.3) is fixedly arranged on the precise linear motion sliding rail (3.2), a pressure measuring mechanism (3.5) and a radiation shielding shell (3.4) are assembled at the lower end part of the mounting plate (3.3), and the radiation shielding shell (3.4) is positioned at the peripheral outer side part of the pressure measuring mechanism (3.5) to surround the pressure measuring mechanism (3.5); the pressure measuring mechanism (3.5) is composed of a flat seat plate (3.5.1), a precise tension spring (3.5.2), a vertical linear motion sliding block (3.5.3), a high-precision force sensor (3.5.4), a precise pressure head (3.5.5) and a guide control upright post (3.5.6); the flat seat plate (3.5.1) is fixedly arranged on the lower end part of the mounting plate (3.3), the guide control upright posts (3.5.6) are symmetrically arranged on the lower end part of the flat seat plate (3.5.1), the vertical linear motion slide block (3.5.3) can be arranged on the positions between the guide control upright posts (3.5.6) which are symmetrically arranged up and down in a reciprocating way, the precise tension spring (3.5.2) is arranged on the position between the lower part of the flat seat plate (3.5.1) and the upper part of the vertical linear motion slide block (3.5.3), the upper end and the lower end of the precision tension spring (3.5.2) are respectively and fixedly connected with the flat seat plate (3.5.1) and the vertical linear motion slide block (3.5.3) to elastically hoist the vertical linear motion slide block (3.5.3) on the flat seat plate (3.5.1), a high-precision force sensor (3.5.4) is arranged on the lower end surface of the vertical linear motion slide block (3.5.3), a precision indenter (3.5.5) is mounted on the lower end face of the high precision force sensor (3.5.4).
3. The full-automatic detection method for the one-dimensional stroke expansion irradiation relaxation is characterized by comprising the following steps of: the method comprises the following steps:
step 1, fixedly mounting an irradiation relaxation assembly on a horizontal linear motion sliding block, driving the irradiation relaxation assembly to move to a multi-function device together by the horizontal linear motion sliding block on a guide rail assembly, and disassembling the irradiation relaxation assembly by the multi-function device to expose an irradiation relaxation sample;
step 2, driving the irradiation relaxation component without the box cover to move to a pressure measurement system together by a horizontal linear motion sliding block on the guide rail component, and measuring the relaxation condition of the irradiation relaxation sample in the irradiation relaxation component according to the following method:
A. the precise linear motion slide rail drives the pressure measuring mechanism to descend, the precise pressure head is gradually close to an irradiation relaxation sample, the extension amount of the precise tension spring generated by hanging the vertical linear motion slide block is fixed, and the displacement, stress and stretching condition of the precise tension spring in the pressure measuring mechanism are analyzed in the process;
B. the precise linear motion slide rail drives the pressure measuring mechanism to continuously descend, the precise pressure head is in virtual contact with the irradiation relaxation sample, the sample is about to change from a two-point support two-point pressing state into a two-point support four-point pressing state, the precise tension spring is about to retract, the elongation is about to decrease, and the displacement, stress and stretching conditions of the precise pressure head are analyzed in the process;
C. the precise linear motion slide rail drives the pressure measuring mechanism to continuously descend, and when the precise pressure head presses the irradiation relaxation sample to enable the irradiation relaxation sample to be in a two-point support four-point pressing state, the displacement, stress and precise tension spring stretching conditions of the precise pressure head are analyzed;
D. the precise linear motion slide rail drives the pressure measuring mechanism to continuously descend, the pressure measuring mechanism stops descending when the maximum internal stress of the irradiation relaxation sample is not more than the yield strength of the irradiation relaxation sample, the irradiation relaxation sample is changed from a two-point support four-point pressing state into a new two-point support two-point pressing state in the process, and the displacement, stress and precise tension spring stretching conditions of a precise pressure head are analyzed;
E. b, the precise linear motion slide rail drives the pressure measuring mechanism to rise and restore to the state before the step A, and the displacement, stress and stretching conditions of the precise pressure head are analyzed in the process;
F. calculating the internal stress change condition of the irradiation relaxation sample according to the displacement, stress and tension condition of the precision pressure head, and calculating the maximum internal stress value when the irradiation relaxation sample is changed from a four-point pressing state of two-point support to a new two-point pressing state of two-point support, namely calculating the irradiation relaxation amount of the sample under different irradiation conditions;
step 3, driving the irradiation relaxation assembly to move to a multi-function device together by a horizontal linear motion sliding block on the guide rail assembly, and reassembling the irradiation relaxation assembly by the multi-function device;
and 4, driving the irradiation relaxation assembly to move to the position before the step 1 on the guide rail assembly by the horizontal linear motion sliding block, taking the irradiation relaxation assembly off the horizontal linear motion sliding block, and completing the stroke expansion irradiation relaxation detection of the irradiation relaxation sample.
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