CN112881210A

CN112881210A - Fatigue crack observation equipment and fatigue crack testing device

Info

Publication number: CN112881210A
Application number: CN202110064479.5A
Authority: CN
Inventors: 温志勋; 李飞; 吴子燕; 李震; 曾献清; 岳珠峰
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-06-01
Anticipated expiration: 2041-01-18

Abstract

The present disclosure relates to a fatigue crack observation device and a test apparatus, including: the bracket comprises a base and a supporting piece, wherein the base is connected with one end of the supporting piece; a mobile device, comprising: the first moving platform is connected with the other end of the supporting piece, and a first sliding rail group extending along a first direction is arranged on one side, away from the supporting piece, of the first moving platform; the second moving platform is positioned on one side, away from the supporting piece, of the first sliding rail group, can slide on the first sliding rail group, and is provided with a second sliding rail group extending along a second direction on one side, away from the supporting piece, of the second moving platform; the third mobile platform is positioned on one side of the second slide rail group, which is far away from the supporting piece, and the third mobile platform can slide on the second slide rail group; the observation mirror is arranged on one side of the third moving platform far away from the supporting piece; wherein the first direction and the second direction intersect. The fatigue crack observation equipment can conveniently and accurately adjust the position of the observation mirror.

Description

Fatigue crack observation equipment and fatigue crack testing device

Technical Field

The disclosure relates to the technical field of mechanical property testing, in particular to fatigue crack observation equipment and a fatigue crack testing device.

Background

At present, in the technical field of mechanical property testing, a microscopic observation method is generally adopted to observe fatigue cracks of a test piece. However, the visual field range and the magnification are inversely proportional to each other when observed by a microscope, and the visual field range is generally very small and cannot effectively track the crack propagation in time when the length of the crack initiation stage (generally less than 100 μm) is observed by about 300 times and 500 times. In this case, the field of view is generally adjusted by directly carrying and moving the microscope. In this way, the operation is inconvenient, the visual field is blurred, and data is lost.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The utility model aims to provide a fatigue crack observation device and fatigue crack testing arrangement, this fatigue crack observation device and fatigue crack testing arrangement can be convenient, the position of accurate adjustment observation mirror.

The present disclosure provides a fatigue crack observation apparatus, including:

the bracket comprises a base and a supporting piece, wherein the base is connected with one end of the supporting piece;

a mobile device, comprising: the first moving platform is connected with the other end of the supporting piece, and a first sliding rail group extending along a first direction is arranged on one side, far away from the supporting piece, of the first moving platform; the second moving platform is positioned on one side, away from the supporting piece, of the first slide rail group, can slide on the first slide rail group, and is provided with a second slide rail group extending along a second direction on one side, away from the supporting piece, of the second moving platform; the third mobile platform is positioned on one side of the second slide rail group away from the supporting piece, and the third mobile platform can slide on the second slide rail group;

the observation mirror is arranged on one side, far away from the supporting piece, of the third moving platform;

wherein the first direction and the second direction intersect.

In an exemplary embodiment of the present disclosure, the mobile device further includes:

the first scale comprises a first sliding groove and a first sliding piece, the first sliding groove is installed on the first moving platform, the opening of the first sliding groove faces the second moving platform, one end of the first sliding piece is located in the first sliding groove, and one side, close to the supporting piece, of the second moving platform is connected with the other end of the first sliding piece.

the second scale comprises a second sliding groove and a second sliding piece, the second sliding groove is installed on the second moving platform, the opening of the second sliding groove faces the third moving platform, one end of the second sliding piece is located in the second sliding groove, and one side, close to the supporting piece, of the third moving platform is connected with the other end of the second sliding piece.

the first adjusting mechanism comprises a first fixing block, a second fixing block, a first moving block and a first threaded rod, the first fixing block and the second fixing block are fixedly mounted on two sides of the first moving platform along a first direction, one end of the first threaded rod penetrates through the first fixing block and is rotatably connected with the second fixing block, the first moving block is meshed with the first threaded rod and is connected with one side, close to the first moving platform, of the second moving platform, and the first moving block is located between the first fixing block and the second fixing block;

the second adjusting mechanism comprises a third fixing block, a fourth fixing block, a second moving block and a second threaded rod, the third fixing block and the fourth fixing block are fixedly installed on two sides of the second moving platform along the second direction, one end of the second threaded rod penetrates through the third fixing block and is rotatably connected with the fourth fixing block, the second moving block is meshed with the second threaded rod and is connected with one side, close to the second moving platform, of the third moving platform, and the second moving block is located between the third fixing block and the fourth fixing block.

In an exemplary embodiment of the disclosure, the first slide rail set has two first slide rails, the two first slide rails are arranged at intervals along the second direction, the first scale and the first adjusting mechanism are located between the two first slide rails, and the moving device further includes:

each first sliding rail is provided with at least one first sliding block, the first sliding blocks can slide on the first sliding rails along a first direction, and one sides, far away from the supporting piece, of the first sliding blocks, the first moving block and the first sliding pieces are located on the same horizontal plane.

In an exemplary embodiment of the disclosure, the second slide rail set has two second slide rails, the two second slide rails are arranged at intervals along the first direction, the second scale and the second adjusting mechanism are located between the two second slide rails, and the moving device further includes:

each second sliding rail is provided with at least one second sliding block, the second sliding blocks can slide on the second sliding rails along a second direction, and one sides, far away from the supporting piece, of the second sliding blocks, the second moving blocks and the second sliding pieces are located on the same horizontal plane.

In an exemplary embodiment of the present disclosure, the support includes:

one end of the fixed rod is connected with the base, a fixed hole is formed in the side face of the fixed rod, an accommodating cavity is formed in the fixed rod, and an opening is formed in one end, far away from the base, of the fixed rod;

one end of the lifting rod is connected with the first moving platform, the other end of the lifting rod penetrates through the opening and is located in the accommodating cavity, a groove is formed in the outer surface of the lifting rod, the groove and the fixing hole are arranged on the same side, and the groove extends along the moving direction of the lifting rod;

the fixing assembly comprises a threaded rod and a handle, and one end of the threaded rod can penetrate through the fixing hole and abut against the groove; the handle is provided with a mounting hole, and the other end of the threaded rod is fixed in the mounting hole.

In an exemplary embodiment of the present disclosure, the bracket further includes:

one end of each inclined supporting rod is connected with the lifting rod, the other end of each inclined supporting rod is connected with one side, close to the lifting rod, of the first mobile platform, and the outer peripheral surfaces of the lifting rods are uniformly distributed along the two inclined supporting rods.

In an exemplary embodiment of the present disclosure, the base includes:

the support device comprises a first support rod and a second support rod, wherein the first support rod and the second support rod are arranged in a separated mode and extend along the same direction;

one end of the connecting rod is connected with the first supporting rod, the other end of the connecting rod is connected with the second supporting rod, a mounting groove is formed in the connecting rod, and one end, far away from the first moving platform, of the fixing rod is mounted in the mounting groove;

one end of the first reinforcing rod is connected with one end, close to the first supporting rod, of the connecting rod, and the other end of the first reinforcing rod is connected with the fixed rod; one end of the second reinforcing rod is connected with one end, close to the second supporting rod, of the connecting rod, and the other end of the second reinforcing rod is connected with the fixed rod;

at least four shock attenuation pieces, four at least shock attenuation pieces are located respectively first bracing piece with the second bracing piece is kept away from one side of first moving platform, just first bracing piece with the both ends of second bracing piece all are provided with at least one the shock attenuation piece.

Another aspect of the present disclosure provides a fatigue crack testing apparatus, including:

the fatigue testing machine is used for carrying out fatigue crack testing on the test piece;

the fatigue crack observation device is any one of the fatigue crack observation devices, the fatigue crack observation device is positioned on the observation side of the fatigue testing machine, and the observation mirror faces the fatigue testing machine.

The technical scheme provided by the disclosure can achieve the following beneficial effects:

the fatigue crack observation device provided by the present disclosure has a support, a moving device, and an observation mirror. The mobile device is provided with a first mobile platform, a second mobile platform and a third mobile platform. Because the first moving platform is connected with the supporting piece, the position of the observation mirror can be adjusted by moving the whole bracket to a large extent. In addition, because the first slide rail group extends along the first direction, the second moving platform can slide along the first direction, and the position of the observation mirror in the first direction can be finely adjusted after the whole observation mirror is adjusted greatly. Furthermore, because the second slide rail set extends along the second direction, the third moving platform can slide along the second direction, and therefore the position of the observation mirror in the second direction can be finely adjusted. Therefore, the fatigue crack observation device can quickly and conveniently adjust the position of the observation mirror. Meanwhile, the position of the observation mirror can be finely adjusted in the first direction and the second direction respectively through the second mobile platform and the third mobile platform, so that the position of the observation mirror is more accurate, and the problems of blurred vision and data loss can be avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 shows a schematic structural view of a fatigue crack observing apparatus according to an exemplary embodiment of the present disclosure;

FIG. 2 shows a schematic structural view of a support according to an exemplary embodiment of the present disclosure;

FIG. 3 illustrates a schematic structural view of a lifter bar according to an exemplary embodiment of the present disclosure;

FIG. 4 illustrates a schematic structural view of a securing assembly according to an exemplary embodiment of the present disclosure;

FIG. 5 illustrates an assembly view of a base according to an exemplary embodiment of the present disclosure;

FIG. 6 shows a schematic view of a partial structure of a fatigue crack observing apparatus according to an exemplary embodiment of the present disclosure;

FIG. 7 illustrates a schematic structural view of a diagonal support bar according to an exemplary embodiment of the present disclosure;

fig. 8 illustrates a schematic structural view of a fifth fixing block according to an exemplary embodiment of the present disclosure;

FIG. 9 illustrates a schematic structural diagram of a mobile device according to an exemplary embodiment of the present disclosure;

FIG. 10 illustrates a schematic structural diagram of a first mobile platform according to an exemplary embodiment of the present disclosure;

FIG. 11 illustrates a schematic structural diagram of a second mobile platform according to an exemplary embodiment of the present disclosure;

FIG. 12 shows a schematic structural view of a fatigue crack observing apparatus according to another exemplary embodiment of the present disclosure;

FIG. 13 shows a schematic structural diagram of a fatigue crack testing apparatus according to an exemplary embodiment of the present disclosure;

fig. 14 shows a schematic structural view of a high temperature furnace according to an exemplary embodiment of the present disclosure.

Description of reference numerals:

1. a support; 2. a mobile device; 3. an observation mirror; 4. a computer; 5. a grating scale display; 6. stretching equipment; 7. a high temperature furnace; 8. a test piece; 11. a base; 12. a support member; 21. a first mobile platform; 22. a first slide rail; 23. a second mobile platform; 24. a first slider; 25. a first scale; 26. a first adjustment mechanism; 27. a second slide rail; 28. a third mobile platform; 29. a second slider; 30. a second scale; 31. a second adjustment mechanism; 32. a fixing ring; 33. a cushion table; 71. windowing; 111. a first support bar; 112. a second support bar; 113. a connecting rod; 114. a first reinforcement bar; 115. a second reinforcement bar; 116. a shock absorbing member; 121. fixing the rod; 122. a lifting rod; 123. a fixing assembly; 124. an inclined support rod; 125. a fifth fixed block; 251. a first chute; 252. a first slider; 261. a first fixed block; 262. a second fixed block; 263. a first moving block; 264. a first threaded rod; 265. a first threaded knob; 301. a second chute; 302. a second slider; 311. a third fixed block; 312. a fourth fixed block; 313. a second moving block; 314. a second threaded rod; 315. a second threaded knob; 1131. mounting grooves; 1161. a triangular support; 1162. a foot support; 1163. a vibration-proof boot; 1221. a groove; 1231. a third threaded rod; 1232. a handle; 1233. cushion blocks; 1241. a first connection portion; 1251. a first connecting plate; 1252. a second connecting portion.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.

As shown in fig. 1, the present disclosure firstly provides a fatigue crack observation device, which can quickly and conveniently adjust the position of the observation mirror 3, and make the position of the observation mirror 3 more accurate, so that the problems of blurred vision and data loss are not caused. Specifically, the method comprises the following steps: as shown in fig. 1 and 9, the fatigue crack observing apparatus may include a support 1, a moving device 2, and an observation mirror 3, wherein the moving device 2 may include a first moving platform 21, a second moving platform 23, and a third moving platform 28.

The above-mentioned stand 1 may include a base 11 and a support 12, wherein the base 11 may be connected to one end of the support 12, and the first moving platform 21 may be connected to the other end of the support 12. The support 1 is used to support the moving device 2 and the scope 3.

In one embodiment of the present disclosure, as shown in fig. 2, the support 12 may include: a fixing rod 121, a lifting rod 122 and a fixing component 123. Wherein, one end of the fixing rod 121 may be connected with the base 11, and a side surface of the fixing rod 121 may have a fixing hole for fixing of the fixing device. The fixing rod 121 may have a hollow structure, that is: the fixing rod 121 may have a receiving cavity therein, while an end of the fixing rod 121 remote from the base 11 may have an opening, and the receiving cavity and the opening may communicate. So that the receiving cavity can receive the lifting rod 122.

The cross-sectional shape of the fixing rod 121 may be rectangular, but is not limited thereto, and may also be circular, triangular, etc., which is within the scope of the present disclosure. In addition, the length and the cross-sectional area of the fixing rod 121 are not limited in the present disclosure, and may be set according to actual needs.

When the cross-sectional shape of the fixing rod 121 is a rectangle, the fixing hole may be located at one side surface or opposite two side surfaces of the fixing rod 121, and the fixing hole may penetrate through the side wall of the fixing rod 121. In one embodiment of the present disclosure, the fixing holes may be located at two opposite sides of the fixing rod 121, and it is understood that one fixing hole is respectively disposed at two opposite sides of the fixing rod 121, so that one fixing assembly 123 may be disposed at each of the two opposite sides of the fixing rod 121, thereby increasing the fixing force of the fixing assembly 123. Meanwhile, the centers of the two fixing holes may be located on the same horizontal line, thereby ensuring that the two fixing members 123 are located on the same horizontal line, and further increasing the fixing force of the fixing members 123.

In addition, the number of the fixing holes is not limited in the present disclosure, and other numbers may also be used, for example: the three sides of the fixing rod 121 may be respectively provided with one fixing hole or all sides of the fixing rod 121 may be provided with one fixing hole, etc.

Further, when the cross-sectional shape of the fixing rod 121 is circular, the fixing holes may be uniformly distributed on the outer circumferential surface of the fixing rod 121 and may penetrate through the outer circumferential surface of the fixing rod 121, and it is understood that the included angle between every two adjacent fixing holes is the same, but not limited thereto, the fixing holes may also be non-uniformly distributed on the outer circumferential surface of the fixing rod 121, and may be arranged according to actual requirements.

As shown in fig. 6, one end of the lifting rod 122 may be connected to the first moving platform 21 of the moving device 2, so that the lifting rod 122 can move up and down to drive the moving device 2 to move up and down. The other end of the lifting rod 122 may be located in the receiving cavity through an opening of the fixing rod 121. It should be noted that, in order to facilitate the lifting of the lifting rod 122, after the lifting rod 122 is located in the accommodating cavity, one end of the lifting rod 122 connected to the first moving platform 21 may be higher than one end of the fixing rod 121 far away from the base 11. But not limited thereto, the end of the lifting rod 122 connected to the first movable platform 21 may be flush with the end of the fixing rod 121 far away from the base 11.

Further, the lifting rod 122 can be lifted manually or automatically by remote control. For example: an electrically controlled jacking device may be disposed on the lifting rod 122 for remotely controlling the lifting of the lifting rod 122.

The cross-sectional area of the lifting rod 122 is smaller than that of the fixing rod 121 so that the lifting rod 122 can be located in the accommodating chamber. In addition, the cross-sectional shape of the lifting rod 122 may be the same as that of the fixing rod 121 so that the lifting rod 122 is more easily fixed, but is not limited thereto, and the cross-sectional shape of the lifting rod 122 may not be the same as that of the fixing rod 121, for example: the cross-sectional shape of the lifting rod 122 may be circular, the cross-sectional shape of the fixing rod 121 may be rectangular, and the cross-sectional diameter of the lifting rod 122 needs to be smaller than the shortest side length of the cross-section of the fixing rod 121.

In an embodiment of the present disclosure, as shown in fig. 3, the outer surface of the lifting rod 122 may have grooves 1221, the grooves 1221 may be disposed on the same side as the fixing holes, it can be understood that the number of the grooves 1221 is the same as the fixing holes, and the positions of the grooves 1221 are the same as the positions of the fixing holes, and when there are two fixing holes on the fixing rod 121, there are also two grooves 1221 on the lifting rod 122.

Further, each of the grooves 1221 may extend in the moving direction of the lifting rod 122, for example: the extending direction of the grooves 1221 may be a vertical direction when the lifting lever 122 moves in the vertical direction.

In addition, one end of the lifting rod 122 connected to the first moving platform 21 may have a plurality of screw holes for fixing the lifting rod 122 to the first moving platform 21 by screws.

As shown in fig. 4, the fixing device may include a third threaded rod 1231 and a handle 1232, wherein one end of the third threaded rod 1231 can pass through the fixing hole and abut against the groove 1221. The third threaded rod 1231 may be engaged with the thread through the hole wall of the fixing hole to fix the fixing device. When one end of the third threaded rod 1231 abuts against the groove 1221 and the third threaded rod 1231 is fixed to the hole wall of the fixing hole, the lifting rod 122 can be clamped, so that the position of the lifting rod 122 can be fixed. When one end of the third threaded rod 1231 is loosened, i.e., not abutted against the groove 1221, the lifting rod 122 is in a loosened state, and the lifting rod 122 can move.

The handle 1232 may have a mounting hole, and the other end of the third threaded rod 1231 may be fixed in the mounting hole, so that the threaded rod can be screwed in or out more laborsavingly and conveniently by rotating the handle 1232.

In one embodiment of the present disclosure, the fixing assembly 123 may further include a spacer 1233, the spacer 1233 having a through hole, an inner surface of which may have threads capable of intermeshing with threads on the third threaded rod 1231. The spacer 1233 may be positioned between the handle 1232 and the fixing rod 121, and the third threaded shaft 1231 may pass through the through hole and engage with the threads on the inner surface of the through hole. The spacer 1233 may be a square block, but is not limited thereto, and may have other shapes. By providing the spacer 1233, the portion of the third threaded rod 1231 to engage can be increased to increase the fixing force of the third threaded rod 1231. Meanwhile, when the third threaded rod 1231 abuts against the groove 1221, the cushion block 1233 may closely abut against the outer wall of the fixing lever 121, so that the stability of the fixing assembly 123 may be increased, and the fixing force of the third threaded rod 1231 may be further increased.

As shown in fig. 5, the base 11 may include: a first support bar 111 and a second support bar 112, the first support bar 111 and the second support bar 112 may be spaced apart, and the first support bar 111 and the second support bar 112 may extend in the same direction. Further, the cross-sectional shapes of the first support rod 111 and the second support rod 112 may be both rectangular, but are not limited thereto, and may be other shapes, which are within the protection scope of the present disclosure. In addition, in order to ensure the stability of the base 11, the lengths of the first support bar 111 and the second support bar 112 may be the same.

Further, the base 11 may further include a connection bar 113, and one end of the connection bar 113 may be connected to the first support bar 111 and the other end may be connected to the second support bar 112. The first support rod 111 and the second support rod 112 are connected by the connecting rod 113, so that the supporting force of the base 11 can be increased. In addition, two ends of the connecting rod 113 can be respectively connected with the middle parts of the first connecting rod 113 and the second connecting rod 113, so that the stability of the base 11 is further improved, and the supporting force of the base 11 is further increased.

In one embodiment of the present disclosure, the connecting rod 113 may have a mounting groove 1131 thereon, and an end of the fixing rod 121 far away from the first moving platform 21 may be mounted in the mounting groove 1131. Further, the bottom surface and the side surface of the mounting groove 1131 each have a screw hole through which the fixing rod 121 can be mounted and fixed. Through installing dead lever 121 in mounting groove 1131, can carry on spacingly through the skew of mounting groove 1131 to dead lever 121 to prevent dead lever 121 skew, with the stability that improves dead lever 121.

In an embodiment of the present disclosure, the first support rod 111, the second support rod 112 and the connection rod 113 may be integrally manufactured, but is not limited thereto, and the first support rod 111, the second support rod 112 and the connection rod 113 may also be separately manufactured and then connected together by welding or the like, which is within the protection scope of the present disclosure.

In addition, the base 11 may further include a first reinforcing bar 114 and a second reinforcing bar 115, wherein one end of the first reinforcing bar 114 may be connected with one end of the connecting bar 113 near the first support bar 111, and the other end of the first reinforcing bar 114 may be connected with the fixing bar 121. One end of the second reinforcing bar 115 may be connected to one end of the connecting bar 113 near the second support bar 112, and the other end of the second reinforcing bar 115 may be connected to the fixing bar 121. Further, the first reinforcing bar 114 and the second reinforcing bar 115 may be placed diagonally, that is: the end of the first reinforcing bar 114 connected to the fixing bar 121 is higher than the end of the first reinforcing bar 114 connected to the connecting bar 113, and the end of the second reinforcing bar 115 connected to the fixing bar 121 is higher than the end of the second reinforcing bar 115 connected to the connecting bar 113.

Besides, the base 11 may further include at least four shock absorbing members 116, the at least four shock absorbing members 116 may be respectively located at a side of the first supporting rod 111 and the second supporting rod 112 away from the first moving platform 21, and at least one shock absorbing member 116 is disposed at both ends of the first supporting rod 111 and the second supporting rod 112.

In one embodiment of the present disclosure, the shock absorbing member 116 may include: a triangular support 1161, a foot support 1162 and a shockproof boot 1163. The triangular supports 1161 may be connected to a side of the first support bar 111 and the second support bar 112 away from the first mobile platform 21, the foot supports 1162 may be connected to a side of the triangular supports 1161 away from the first support bar 111 and the second support bar 112, and the anti-skid boots may be connected to a side of the foot supports 1162 away from the triangular supports 1161. By providing the shock absorbing member 116 in this configuration, the influence of the vibration in the environment on the scope 3 can be prevented.

As shown in fig. 6, the support 1 may further include at least two inclined support rods 124, one end of each inclined support rod 124 may be connected to the lifting rod 122, the other end of each inclined support rod 124 may be connected to a side of the first moving platform 21 close to the lifting rod 122, and the at least two inclined support rods 124 may be uniformly distributed along an outer circumferential surface of the lifting rod 122. The supporting force and the supporting stability of the bracket 1 can be significantly increased by providing the inclined supporting rod 124.

Further, as shown in fig. 7 and 8, both ends of the inclined support rod 124 may have first connection portions 1241, and each of the first connection portions 1241 may be provided with a through hole. The rack 1 may further include a fifth fixing block 125, the fifth fixing block 125 may have a first connection plate 1251 and a second connection part 1252, the first connection plate 1251 may be connected with the second connection part 1252, and the second connection part 1252 may extend in a direction away from the first connection plate 1251, wherein the first connection plate 1251 has a through hole thereon, the second connection part 1252 has a fixing groove, and both sides of the fixing groove of the second connection part 1252 are also provided with through holes.

Both ends of each of the inclined support bars 124 may be provided with a fifth fixing block 125. It is understood that the fifth fixing block 125 disposed at one end of the inclined supporting rod 124 connected to the first moving platform 21 may be connected to the first moving platform 21 through a through hole formed in the first connecting plate 1251, and the first connecting portion 1241 of the inclined supporting rod 124 may be located in the fixing groove and connected to the fixing groove through a screw and a through hole. The fifth fixing block 125 disposed at one end of the inclined supporting rod 124 connected to the lifting rod 122 may be connected to the lifting rod 122 through a through hole of the first connecting plate 1251, and the first connecting portion 1241 of the inclined supporting rod 124 may be located in the fixing groove and connected to the through hole through a screw.

By providing the fifth fixing block 125, the contact area between the inclined supporting rod 124 and the first moving platform 21 and the lifting rod 122 can be increased, thereby improving the stability of the support of the inclined supporting rod 124.

As shown in fig. 9 and 10, a side of the first moving platform 21 away from the supporting member 12 may be provided with a first sliding rail set extending along a first direction. The first slide rail set may have two first slide rails 22, and the two first slide rails 22 may be arranged along the second direction in a spaced manner. Through setting up two first slide rails 22, can increase the stability when second moving platform 23 slides, and then prevent that observation mirror 3 from taking place to rock and the displacement at gliding in-process to cause observation mirror 3's positional deviation, make observation mirror 3's the field of vision fuzzy, the problem of losing data.

The second moving platform 23 may be located on a side of the first sliding rail set away from the support 12, and the second moving platform 23 can slide on the first sliding rail set.

Further, each first slide rail 22 is provided with at least one first slide block 24, the first slide block 24 may have a third sliding groove, the first slide block 24 may be engaged with the first slide rail 22 through the third sliding groove, and the first slide block 24 may slide on the first slide rail 22. The first slider 24 may have at least one screw hole through which the second moving platform 23 may be fixed to the first slider 24 so that the second moving platform 23 can be moved by the movement of the first slider 24.

In one embodiment of the present disclosure, two first sliders 24 may be disposed on each first slide rail 22. The spacing between the two first sliders 24 is 3cm, but is not limited thereto, and the spacing between the two first sliders 24 may be other distances, which is within the scope of the present disclosure. Through setting up two first sliders 24, can increase first slider 24's bearing capacity and stability to make second moving platform 23 can not cause the damage to first slide rail 22 at the in-process that removes, can also improve the stationarity that second moving platform 23 removed.

Further, the mobile device 2 may further include: a first scale 25, the first scale 25 may include a first slide groove 251 and a first slider 252, wherein the first slide groove 251 may be mounted on the first moving platform 21 and may be located between the two first slide rails 22, and an opening of the first slide groove 251 may face the second moving platform 23. One end of the first sliding member 252 may be located in the first sliding groove 251, and one side of the second moving platform 23 adjacent to the support member 12 may be connected to the other end of the first sliding member 252.

Further, the length of the first sliding groove 251 may be greater than or equal to the length of the first sliding rail 22, so as to ensure that the range of the first scale 25 can satisfy the distance that the second moving platform 23 can move.

Further, the first scale 25 may be a grating scale, and the distance moved by the second moving platform 23 can be directly measured by the movement of the first sliding component 252, so as to accurately determine the position of the observation mirror 3 moved in the first direction. In addition, when the first scale 25 is not a grating scale, the first sliding groove 251 may be provided with a scale, and the moving position of the scope 3 may be determined by observing the scale.

In one embodiment of the present disclosure, the mobile device 2 may further include: the first adjusting mechanism 26 may include a first fixing block 261, a second fixing block 262, a first moving block 263, and a first threaded rod 264, wherein the first fixing block 261 and the second fixing block 262 may be fixedly installed at both sides of the first moving platform 21 in the first direction, and one end of the first threaded rod 264 may pass through the first fixing block 261 and be rotatably connected with the second fixing block 262. The first moving block 263 may be engaged with the first threaded rod 264, and the first moving block 263 may be located between the first and second fixed

blocks

261 and 262.

Further, the first moving block 263 may be connected to a side of the second moving platform 23 close to the first moving platform 21. One side of the first moving block 263 close to the second moving platform 23 may be provided with a threaded hole, and the second moving platform 23 can be connected with the first moving block 263 through the threaded hole.

Further, at an end of the first threaded rod 264 remote from the second fixed block 262, a first threaded knob 265 may be provided, by which the threaded rod 265 may be rotated. By rotating the threaded rod, the first moving block 263 can be driven to perform continuous displacement, so that the second moving platform 23 performs continuous displacement in the first direction. Meanwhile, since the first moving block 263 is continuously displaced, the position of the second moving platform 23 can be finely and accurately adjusted.

In an embodiment of the present disclosure, as shown in fig. 11, a side of the second moving platform 23 away from the support 12 may be provided with a second sliding rail set extending along a second direction, wherein the first direction may intersect with the second direction. The second slide rail set may have two second slide rails 27, and the two second slide rails 27 may be arranged in a spaced manner along the first direction. Through setting up two second slide rails 27, can increase the stability when third moving platform 28 slides, and then prevent that observation mirror 3 from taking place to rock and the displacement at gliding in-process to cause the positional deviation of observation mirror 3, make the field of vision of observation mirror 3 fuzzy, the problem of lost data.

The third moving platform 28 may be located on a side of the second slide rail set away from the support 12, and the third moving platform 28 can slide on the second slide rail set.

Further, each second slide rail 27 is provided with at least one second slide block 29, the second slide block 29 may have a fourth slide groove, the second slide block 29 may be engaged with the second slide rail 27 through the fourth slide groove, and the second slide block 29 may slide on the second slide rail 27. The second slider 29 may have at least one screw hole through which the third moving platform 28 may be fixed to the second slider 29, so that the third moving platform 28 can move by the movement of the second slider 29.

In one embodiment of the present disclosure, two second sliding blocks 29 may be disposed on each of the second sliding rails 27. The interval between the two second sliders 29 is 3cm, but is not limited thereto, and the interval between the two second sliders 29 may be other distances, which is within the protection scope of the present disclosure. Through setting up two second sliders 29, can increase the bearing capacity and the stability of second slider 29 to make third moving platform 28 can not cause the damage to second slide rail 27 at the in-process that removes, can also improve the stationarity that third moving platform 28 removed.

Further, the mobile device 2 may further include: a second scale 30, the second scale 30 may include a second slide groove 301 and a second slider 302, wherein the second slide groove 301 may be mounted on the second moving platform 23 and may be located between the two second slide rails 27, and an opening of the second slide groove 301 may face the third moving platform 28. One end of the second sliding member 302 may be located in the second sliding groove 301, and a side of the third moving platform 28 adjacent to the supporting member 12 may be connected to the other end of the second sliding member 302.

Further, the length of the second sliding chute 301 may be greater than or equal to the length of the second sliding rail 27, so as to ensure that the range of the second scale 30 can satisfy the distance that the third moving platform 28 can move.

Further, the second scale 30 may be a grating scale, and the distance moved by the third moving platform 28 can be directly measured by the movement of the second sliding member 302, so as to accurately determine the position of the observation mirror 3 moved in the second direction. In addition, when the second scale 30 is not a grating scale, the second sliding groove 301 may be provided with scales, and the moving position of the scope 3 may be determined by observing the scales.

In one embodiment of the present disclosure, the mobile device 2 may further include: and the second adjusting mechanism 31 may include a third fixed block 311, a fourth fixed block 312, a second moving block 313 and a second threaded rod 314, wherein the third fixed block 311 and the fourth fixed block 312 may be fixedly mounted on two sides of the second moving platform 23 along the second direction, and one end of the second threaded rod 314 may pass through the third fixed block 311 and be rotatably connected with the fourth fixed block 312. The second moving block 313 may be engaged with the second threaded rod 314, and the second moving block 313 may be located between the third and fourth fixed

blocks

311 and 312.

Further, a second moving block 313 may be connected to a side of the third moving platform 28 close to the second moving platform 23. A threaded hole may be formed at a side of the second moving block 313 close to the third moving platform 28, and the third moving platform 28 may be connected to the second moving block 313 through the threaded hole.

Further, at an end of the second threaded rod 314 far from the fourth fixing block 312, a second threaded knob 315 may be provided, by which second threaded knob 315 the threaded rod may be rotated. By rotating the threaded rod, the first moving block 263 can be driven to perform continuous displacement, so that the second moving platform 23 performs continuous displacement in the first direction. Meanwhile, since the first moving block 263 is continuously displaced, the position of the second moving platform 23 can be finely and accurately adjusted.

In one embodiment of the present disclosure, the side length of the second moving platform 23 may be less than the side length of the first moving platform 21, the side length of the third moving platform 28 may be less than the side length of the second moving platform 23, the length of the second slide rail 27 may be less than the length of the first slide rail 22, the length of the second scale 30 may be less than the length of the first scale 25, and the length of the second adjusting mechanism 31 may be less than the length of the first adjusting mechanism, for example: the side length of the second moving platform 23 and the side length of the first moving platform 21 may differ by 10cm, the side length of the third moving platform 28 and the side length of the second moving platform 23 may differ by 10cm, the length of the second slide rail 27 and the length of the first slide rail 22 may differ by 10cm, the length of the second scale 30 and the length of the first scale 25 may differ by 10cm, and the length of the second adjusting mechanism 31 and the length of the first adjusting mechanism may differ by 10cm, but is not limited thereto.

Further, the pad platforms 33 may be disposed on both sides of the first slide rail 22 contacting the first moving platform 21 and both sides of the second slide rail 27 contacting the second moving platform 23, and two pad platforms 33 may be disposed on both sides of each of the first slide rail 22 contacting the first moving platform 21 and each of the second slide rail 27 contacting the second moving platform 23, and the two pad platforms 33 may be respectively disposed at both ends of the first slide rail 22 and the second slide rail 27 to support the first slide rail 22 and the second slide rail 27.

In addition, the first direction and the second direction may be perpendicular to each other, so that the position of the observation mirror 3 can be adjusted in two mutually perpendicular directions, thereby further facilitating the adjustment of the position of the observation mirror 3.

As shown in fig. 1 and 9, the above-mentioned observation mirror 3 may be installed at a side of the third moving platform 28 away from the support 12. The observation mirror 3 may be a microscope, but is not limited thereto, and may be another observation mirror 3 having an observation function.

In one embodiment of the present disclosure, the moving device 2 may further include a fixing ring 32, the fixing ring 32 may be mounted on a side of the third moving platform 28 away from the support 12, and the observation mirror 3 is located between the fixing ring 32 and the third moving platform 28, so that the observation mirror 3 is fastened on the third moving platform 28 through the fixing ring 32.

Further, as shown in fig. 12, the fatigue crack observing apparatus may further include a computer 4, which can be connected to the scope 3 through the computer 4 to receive the fatigue crack image observed by the scope 3 in real time.

In addition, when the first and second scales 25 and 30 are grating scales, the fatigue crack observing apparatus may further include a grating scale display 5. The grating ruler display 5 can be connected with a grating ruler to display specific moving values of the second moving platform 23 and the third moving platform 28 in real time, so that the length of the fatigue crack can be recorded conveniently.

Another aspect of the present disclosure provides a fatigue crack testing device, and this fatigue crack testing device can be fast, convenient adjust the position of observation mirror 3 to make the position of observation mirror 3 more accurate, thereby also can not cause the blurred vision, problem that data lost. Specifically, the fatigue crack testing apparatus may include: a fatigue testing machine and at least one fatigue crack observation device. The fatigue crack observation device can be the fatigue crack observation device, the fatigue crack observation device can be positioned on the observation side of the fatigue testing machine, and the observation mirror 3 can face the fatigue testing machine.

Further, as shown in fig. 13, the fatigue testing machine may have a tensile apparatus 6 and a high temperature furnace 7, wherein the high temperature furnace 7 may provide a high temperature environment for the fatigue test. As shown in fig. 14, the high temperature furnace 7 may have a hollow cavity for receiving and holding the test piece 8, and a window 71 is provided on a circumferential surface of the high temperature furnace 7 for observing fatigue cracks of the test piece 8. The tensile device 6 may have an upper and a lower tie bar, which may be connected with both ends of the test piece 8, respectively, for simultaneously stretching the test piece 8 in both directions.

In one embodiment of the present disclosure, as shown in fig. 14, the high temperature furnace 7 may have two windows 71 oppositely disposed so as to simultaneously observe fatigue cracks of the test piece 8 from a plurality of angles. When the high-temperature furnace 7 has two windows 71, the fatigue crack observing apparatus may have two fatigue crack observing devices, and the two fatigue crack observing devices may be respectively located on the two windows 71 sides of the high-temperature furnace 7, and the two observation mirrors 3 may respectively face the two windows 71. It should be noted that, the number of the window 71 and the fatigue crack observing device is not limited in the present disclosure, and may be other numbers, and the numbers may be set according to actual needs, which are all within the protection scope of the present disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A fatigue crack observing apparatus, characterized by comprising:

wherein the first direction and the second direction intersect.

2. The fatigue crack observing apparatus according to claim 1, wherein the moving device further comprises:

3. The fatigue crack observing apparatus according to claim 2, wherein the moving device further comprises:

4. The fatigue crack observing apparatus according to claim 3, wherein the moving device further comprises:

5. The fatigue crack observing apparatus according to claim 4, wherein the first slide rail group has two first slide rails arranged at a distance from each other in the second direction, the first scale and the first adjusting mechanism are located between the two first slide rails, and the moving device further comprises:

6. The fatigue crack observing apparatus according to claim 4, wherein the second slide rail group has two second slide rails arranged at a spacing in the first direction, the second scale and the second adjusting mechanism are located between the two second slide rails, and the moving device further comprises:

7. The fatigue crack observation apparatus of claim 1, wherein the support comprises:

8. The fatigue crack observing apparatus of claim 7, wherein the bracket further comprises:

9. The fatigue crack observation apparatus of claim 7, wherein the base comprises:

10. A fatigue crack testing apparatus, comprising:

at least one fatigue crack observation device, wherein the fatigue crack observation device is the fatigue crack observation device as claimed in any one of claims 1 to 9, and the fatigue crack observation device is positioned at the observation side of the fatigue testing machine, and the observation mirror faces the fatigue testing machine.