CN216846642U

CN216846642U - Multifunctional sample table for deep stress and texture of neutron detection engineering component

Info

Publication number: CN216846642U
Application number: CN202220517480.9U
Authority: CN
Inventors: 吴运新; 龚海; 钟掘; 何永飚; 曹轩; 刘香苗
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-06-28
Anticipated expiration: 2032-03-09

Abstract

The utility model provides a multifunctional sample platform for neutron detection engineering component deep stress and texture, which comprises a multi-degree-of-freedom motion installation platform with large stroke and a multi-degree-of-freedom sample installation platform with small stroke, wherein the multi-degree-of-freedom sample installation platform comprises a C-shaped guide rail, a first rotating platform movably connected with the C-shaped guide rail, a first X-axis translation platform movably connected with the first rotating platform, a first Y-axis translation platform movably connected with the first X-axis translation platform and a first Z-axis lifting platform movably connected with the first Y-axis translation platform, the C-shaped guide rail is arranged on the multi-degree-of-freedom motion installation platform, has the advantages of multi-degree of freedom, large bearing, large stroke, stable motion, less clamping times, high positioning precision and the like, can meet the needs of neutron diffraction stress test and texture test in large-size and heavy-weight workpieces, can improve the signal diffraction intensity and improve the test efficiency, the method meets the requirement of texture detection on a member with certain size and weight.

Description

Multifunctional sample table for deep stress and texture of neutron detection engineering component

Technical Field

The utility model relates to a technical field is measured with the normal position of big component to the material, in particular to a multi-functional sample platform that is used for neutron detection engineering component deep stress and texture.

Background

The real and direct measurement of the stress at the deep part of the material and the component is always the goal pursued by many researchers, and the distribution state of the internal stress of the large-scale complex component is difficult to accurately obtain through theoretical analysis, finite element calculation and the traditional nondestructive testing means, thus greatly hindering the development of high-end components. The neutron scattering technology can directly detect the change of the distance between the crystal structure material and the deep atomic plane of the component, so as to reflect the internal stress state of the material and detect the internal texture state of the component. The construction of a neutron spectrometer suitable for detecting deep stress and texture of engineering components is an urgent need of modern engineering manufacture and engineering material research, and a multifunctional sample stage which can conveniently adjust the posture of a measured sample, so that the sampling volume center (measured point) of the measured sample can be always positioned at the intersection point of an incident neutron beam and a diffracted neutron beam is one of core components influencing the applicability, the measurement precision and the measurement range of the neutron spectrometer and is a basis for accurate movement, positioning and measurement of the sample.

The demand of the engineering field for detecting the stress of the member is continuously improved, on one hand, the demand of the stress test of the member with large volume and heavy weight is required to be met, on the other hand, the intensity of neutron diffraction is required to be improved, the test efficiency is required to be improved, for example, the member such as aluminum alloy and the like is generally formed in a plastic mode, and certain texture orientation exists in the member. Therefore, in the neutron diffraction stress test, a better test angle is found and selected, and the test efficiency can be improved in multiples; secondly, texture detection of a member with certain size and weight requires a sample stage support with the function of an Oldham's ring (the size and weight of a load-bearing sample are small). Therefore, the creative development of a sample table with the comprehensive functions is urgently needed.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: aiming at the defects in the background technology, the multifunctional sample table for adjusting the position and the posture of the engineering component during deep stress and texture neutron diffraction test is provided.

In order to achieve the aim, the utility model provides a multifunctional sample stage for detecting deep stress and texture of an engineering component for neutron, which comprises a multi-degree-of-freedom motion installation stage with large stroke and a multi-degree-of-freedom sample installation stage with small stroke, the multi-degree-of-freedom sample mounting table comprises a C-shaped guide rail, a first rotating table movably connected with the C-shaped guide rail, a first X-axis translation table movably connected with the first rotating table, a first Y-axis translation table movably connected with the first X-axis translation table, and a first Z-axis lifting table movably connected with the first Y-axis translation table, the first Z-axis lifting platform is used for fixing a sample, the C-shaped guide rail is arranged on the multi-degree-of-freedom motion mounting platform, the multi-degree-of-freedom motion installation platform has a plurality of motion degrees of freedom and controls the multi-degree-of-freedom sample installation platform to move integrally and greatly.

Furthermore, an inner gear ring is arranged on the inner side of the C-shaped guide rail, the first rotating platform is connected with a sliding block, the sliding block is connected with the C-shaped guide rail in a sliding mode, meanwhile, a first gear meshed with the inner gear ring is arranged on the sliding block in a rotating mode, and the first gear is driven by a first motor connected with the sliding block.

Further, the first Z-axis lifting platform is a shear type electric control lifting platform.

Furthermore, a base is arranged at the bottom end of the C-shaped guide rail, and the C-shaped guide rail is connected with the multi-degree-of-freedom motion installation table through the base.

Further, the multi-degree-of-freedom motion installation platform comprises an installation plate fixed with the base, the installation plate is connected with a second X-axis translation platform, the second X-axis translation platform is connected with a second Y-axis translation platform, the second Y-axis translation platform is connected with a second Z-axis lifting platform, the second Z-axis lifting platform is connected with a second rotating platform, and the second rotating platform is connected with a supporting platform.

Furthermore, an outer gear ring is arranged on the outer side of the second rotating platform, a plurality of second gears meshed with the outer gear ring are rotatably arranged on the supporting platform, and the second gears are driven by a second motor connected with the supporting platform.

The above technical scheme of the utility model has following beneficial effect:

the utility model provides a multifunctional sample platform, have multi freedom, big bearing, big stroke, the motion is steady, the clamping number of times is few, positioning accuracy advantage such as high, can satisfy the needs of neutron diffraction stress test and texture test in big volume, the big weight work piece, rely on the mounting means and the high accuracy motion of multi freedom sample mount table, can be when testing component residual stress preferred selection direction, select better test angle, in order to improve signal diffraction intensity, improve test efficiency, and can satisfy the requirement of carrying out the texture detection to the component of certain size and weight;

other advantageous effects of the present invention will be described in detail in the following detailed description.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

[ description of reference ]

1-C shaped guide rails; 2-a first rotating table; 3-a first X-axis translation stage; 4-a first Y-axis translation stage; 5-a first Z-axis lift table; 6-a base; 7-inner gear ring; 8-a slide block; 9-a first gear; 10-a first electric machine; 11-a mounting plate; 12-a second X-axis translation stage; 13-a second Y-axis translation stage; 14-a second Z-axis lift table; 15-a second rotating table; 16-a support table; 17-external gear ring; 18-a second gear; 19-a second motor.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In addition, the technical features related to the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, an embodiment of the utility model provides a multi-functional sample platform for neutron detection engineering component deep stress and texture, multi freedom motion mount table including the big stroke and the multi freedom sample mount table of little stroke. The multi-degree-of-freedom motion mounting table further has the characteristic of large bearing, realizes large-stroke translation and rotation of a sample, and is used for supporting a large member, translating and selecting a measuring point inside a workpiece to be tested, moving the measuring point inside the workpiece to a preset height (neutron beam height) and rotating and selecting the stress test direction of the measuring point of the workpiece during neutron diffraction stress test.

The multi-degree-of-freedom sample mounting table is mounted on the multi-degree-of-freedom motion mounting table and matched with the multi-degree-of-freedom motion mounting table, so that high-precision translation and rotation are realized after a measured point of a sample moves to a preset height, and the multi-degree-of-freedom sample mounting table is used for measuring the texture of a workpiece through neutron diffraction and preferentially selecting the strong signal direction of a weak texture when the stress of the workpiece is measured through the neutron diffraction.

The multi-degree-of-freedom sample mounting table comprises a C-shaped guide rail 1, a first rotating table 2 movably connected with the C-shaped guide rail 1, a first X-axis translation table 3 movably connected with the first rotating table 2, a first Y-axis translation table 4 movably connected with the first X-axis translation table 3 and a first Z-axis lifting table 5 movably connected with the first Y-axis translation table 4. In this embodiment, the first Z-axis lifting table 5 is preferably a shear-type electric control lifting table, and a sample is fixed on the shear-type electric control lifting table during detection. The first X-axis translation table 3, the first Y-axis translation table 4, the first rotating table 2 and the like all adopt high-precision motion platforms, and the rotational freedom degree of the first rotating table 2 is phi. Of course, in other embodiments, other forms may be adopted, and only the requirement of high precision is met, and no specific limitation is made here.

The C-shaped guide rail 1 is installed on the multi-degree-of-freedom motion installation table, and a base 6 is arranged at the bottom end of the C-shaped guide rail 1 and connected with the multi-degree-of-freedom motion installation table through the base 6. An inner gear ring 7 is distributed on the inner side of the C-shaped guide rail 1, the first rotating platform 2 is connected with a sliding block 8, the sliding block 8 is in sliding connection with the C-shaped guide rail 1, meanwhile, a first gear 9 meshed with the inner gear ring 7 is rotatably arranged on the sliding block 8, and the first gear 9 is driven by a first motor 10 connected with the sliding block 8, so that the whole body on the sliding block 8 can be controlled to slide along the C-shaped guide rail 1 through the driving of the first motor 10, and the beta-direction rotating motion is generated.

In this embodiment, the multiple degree of freedom motion mounting table includes a mounting plate 11 fixed to the base 6, the mounting plate 11 is connected to a second X-axis translation table 12, the second X-axis translation table 12 is connected to a second Y-axis translation table 13, the second Y-axis translation table 13 is connected to a second Z-axis lifting table 14, the second Z-axis lifting table 14 is connected to a second rotation table 15, and the second rotation table 15 is connected to a support table 16, and has a rotational degree of freedom around the Z-axis. Therefore, the multi-degree-of-freedom motion installation table comprises three translational degrees of freedom and one rotational degree of freedom, and multi-degree-of-freedom large-stroke adjustment is achieved.

The second X-axis translation stage 12, the second Y-axis translation stage 13, the second rotation stage 15, and the like all adopt motion platforms with large strokes, and in other embodiments, other forms may be adopted, and only the large stroke is required, which is not limited specifically here.

In the present embodiment, an outer ring gear 17 is disposed outside the second turntable 15, a plurality of second gears 18 engaged with the outer ring gear 17 are rotatably disposed on the support base 16, and the second gears 18 are driven by a second motor 19 connected to the support base 16, so that the second turntable 15 can be controlled to rotate by the driving of the second motor 19, and a rotational motion about the Z axis is generated.

Preferably, in the embodiment, the multi-degree-of-freedom motion mounting table bears 1000kg at the maximum, can translate +/-400 mm in the X direction and the Y direction (horizontal plane direction), can translate 550mm in the Z direction (vertical direction), has the positioning accuracy of 0.03mm, and can rotate 360 degrees around the Z axis of the multi-degree-of-freedom motion mounting table integrally and have the positioning accuracy of 0.005 degrees.

The multi-degree-of-freedom sample mounting platform can realize high-precision translation motion of a sample (with the maximum weight of 20kg) in X direction and Y direction (horizontal plane direction) +/-37.5 mm, high-precision lifting motion of 0-60 mm in Z direction (vertical direction), rotary motion of 0-90 degrees in beta direction and rotary motion of 0-360 degrees in phi direction.

In a specific embodiment, it is desirable to perform a residual stress test on a textured sample by neutron diffraction. The height of the neutron beam is 1400 mm. Firstly, selecting an installation mode of a multi-degree-of-freedom sample installation table according to actual working conditions, taking the horizontal installation of a C-shaped guide rail 1 (corresponding to the angle range of-45 degrees of the C-shaped guide rail 1) as an example, connecting the multi-degree-of-freedom sample installation table with a multi-degree-of-freedom motion installation table, and fixing a sample at a corresponding position of the multi-degree-of-freedom sample installation table.

The multi-degree-of-freedom sample mounting table and the multi-degree-of-freedom motion mounting table work in a matched mode, the multi-degree-of-freedom motion mounting table is used for achieving high supporting and large-stroke motion of a sample, and the multi-degree-of-freedom sample mounting table is used for achieving small-stroke motion of the sample, so that a measured point of the sample moves to a neutron beam position. The sampling volume in the large component can be selected through the translation of the multi-degree-of-freedom motion mounting table, and the stress testing direction (0 degree or 90 degrees) of the large component can be selected through the rotation of the multi-degree-of-freedom motion mounting table.

The direction preference selection when testing stress in a certain direction is realized through the rotary motion of the multi-freedom-degree sample mounting table. The preferred direction here is achieved by rotation about the corresponding axis. After neutrons generated by fission of the nuclear reactor pass through the neutron guide tube, neutron beams with specific wavelengths are selected through the monochromator, and the neutron beams are captured by the neutron detector after flowing through a sample. For example, the residual stress of a sample in the X direction is measured, the preferred selection direction is selected by rotating around the X axis, a better test angle is selected, and a peak shape with good quality is obtained, so that the peak position, the half-height width and the peak intensity of a diffraction peak can be accurately known, and the residual stress information can be obtained.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a multi-functional sample platform for neutron detection engineering component deep stress and texture which characterized in that, multi freedom sample mount table including the multi freedom motion mount table of big stroke and little stroke, multi freedom sample mount table include C shape guide rail, with C shape guide rail swing joint's first revolving stage, with first revolving stage swing joint's first X axle translation platform, with first X axle translation platform swing joint's first Y axle translation platform and with first Y axle translation platform swing joint's first Z axle elevating platform, fixed sample on the first Z axle elevating platform, the C shape guide rail is installed on the multi freedom motion mount table, the multi freedom motion mount table has a plurality of motion degrees of freedom, controls multi freedom sample mount table bulk motion.

2. The multifunctional sample table for the deep stress and the texture of the neutron detection engineering component according to claim 1, wherein an inner gear ring is arranged on the inner side of the C-shaped guide rail, the first rotating table is connected with a sliding block, the sliding block is connected with the C-shaped guide rail in a sliding manner, a first gear meshed with the inner gear ring is rotatably arranged on the sliding block, and the first gear is driven by a first motor connected with the sliding block.

3. The multifunctional sample stage for the deep stress and texture of the neutron detection engineering component of claim 1, wherein the first Z-axis lifting stage is a shear-type electrically controlled lifting stage.

4. The multifunctional sample stage for the deep stress and the texture of the neutron detection engineering component according to claim 1, wherein a base is arranged at the bottom end of the C-shaped guide rail, and the C-shaped guide rail is connected with the multi-degree-of-freedom motion installation stage through the base.

5. The multifunctional sample stage for deep stress and texture of neutron detection engineering components of claim 4, wherein the multi-degree-of-freedom motion mounting stage comprises a mounting plate fixed to the base, the mounting plate is connected to a second X-axis translation stage, the second X-axis translation stage is connected to a second Y-axis translation stage, the second Y-axis translation stage is connected to a second Z-axis lifting stage, the second Z-axis lifting stage is connected to a second rotation stage, and the second rotation stage is connected to a support stage.

6. The multifunctional sample table for the deep stress and texture of the neutron detection engineering component according to claim 5, wherein an outer gear ring is arranged on the outer side of the second rotating table, a plurality of second gears meshed with the outer gear ring are rotatably arranged on the supporting table, and the second gears are driven by a second motor connected with the supporting table.