CN217484005U - Buckling-restrained device and test device for tension-compression fatigue test of butt-welded metal plate - Google Patents

Abstract

The utility model discloses a butt welding sheet metal draws presses anti buckling device and test device of fatigue test, this anti buckling device includes: a first clamp and a second clamp; the first clamp is internally provided with a first upper clamping plate and a first lower clamping plate which are distributed along the vertical direction, and the first upper clamping plate and the first lower clamping plate can simultaneously clamp the first sub-plate and the second sub-plate; the lower surface of the first upper clamping plate and the upper surface of the first lower clamping plate are respectively provided with symmetrical grooves, and the two grooves jointly form a space for accommodating the welding line; the second clamp can clamp the upper and lower surfaces of the third sub-sheet. Thereby enabling fatigue testing of the metal sheet containing the weld.

Description

Buckling-restrained device and test device for tension-compression fatigue test of butt-welded metal plate

Technical Field

The utility model relates to a metal material's fatigue performance test technical field especially relates to a butt welding sheet metal draws presses anti-buckling device and test device of fatigue test.

Background

In consideration of energy conservation and emission reduction, the light weight of the automobile is paid more and more attention, the metal plate can be widely applied because the weight of the automobile can be effectively reduced, and welding is a common connection mode for the metal plate. In the daily driving process of the automobile, the automobile structure or parts are often subjected to cyclic load under the influence of factors such as road conditions, so that the requirement on the fatigue performance of the automobile sheet material is high, and the fatigue test of the metal sheet material and the welding parts thereof becomes the detection requirement of various automobile part manufacturers. When the metal plate is subjected to a tension-compression fatigue test, instability is caused due to axial buckling, so that the test fails.

Therefore, designing a fixture capable of performing a fatigue test on a metal plate including a weld becomes an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the main object of the present invention is to provide a buckling restrained device and a testing apparatus for a tension-compression fatigue test of butt-welded metal plates.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this: a buckling-restrained device for a tension-compression fatigue test of a butt-welded metal plate comprises a first sub-plate, a second sub-plate and a third sub-plate which are distributed along the left-right direction, wherein the left end part of the second sub-plate is connected to the first sub-plate through a welding seam, and the right end part of the second sub-plate and the third sub-plate are integrally formed; the method comprises the following steps: a first clamp and a second clamp; the first clamp is internally provided with a first upper clamping plate and a first lower clamping plate which are distributed along the vertical direction, and the first upper clamping plate and the first lower clamping plate can simultaneously clamp the first sub-plate and the second sub-plate; the lower surface of the first upper clamping plate and the upper surface of the first lower clamping plate are respectively provided with symmetrical grooves, and the two grooves jointly form a space for accommodating the welding seam; the second clamp can clamp the upper and lower surfaces of the third sub-sheet.

As an improvement of the embodiment of the present invention, the first upper clamping plate is used for applying a downward clamping force to the upper surfaces of the first and second sub-plates; the first lower clamping plate is used for applying upward clamping force to the lower surfaces of the first sub-plate and the second sub-plate; the second clamp is internally provided with a second upper clamping plate and a second lower clamping plate which are distributed along the vertical direction, and the second upper clamping plate is used for applying downward clamping force to the upper surface of the third sub-plate; the second lower clamping plate is used for applying upward clamping force to the lower surface of the third sub-plate.

As an improvement of the embodiment of the utility model, the right end part of the first upper clamping plate is of a first sawtooth structure with the tooth tops facing right, and the left end part of the second upper clamping plate is matched with the first sawtooth structure and is not contacted with the first sawtooth structure; the right end part of the first lower clamping plate is of a second sawtooth structure with the tooth tops facing right, and the left end part of the second lower clamping plate is matched with the second sawtooth structure and is not contacted with the second sawtooth structure.

As an improvement of the embodiment of the utility model, the tooth tips in the first and the second sawtooth structures are arranged in a staggered way in the front and back directions.

As an improvement of the embodiment of the utility model, the distance of the gap between the first and the second upper clamping plates in the left-right direction is a constant value LA, and LA is more than or equal to 1mm and less than or equal to 2 mm; the distance of the gap between the first lower clamping plate and the second lower clamping plate in the left-right direction is a constant value LB, and LB is more than or equal to 1mm and less than or equal to 2 mm.

As an improvement of the embodiment of the present invention, in the first upper clamping plate, the groove runs through the first upper clamping plate in the front-rear direction, and in the first lower clamping plate, the groove runs through the first lower clamping plate in the front-rear direction.

As an improvement of the embodiment of the utility model, the groove in the first upper clamping plate is the arc wall, and the groove in the first lower clamping plate is the arc wall.

As an improvement of the embodiment of the present invention, the front end portions of the first upper clamping plate and the first lower clamping plate are connected by a first bolt, and the rear end portions of the first upper clamping plate and the first lower clamping plate are connected by a first bolt; the front end parts of the second upper clamping plate and the second lower clamping plate are connected through a second bolt, and the rear end parts of the second upper clamping plate and the second lower clamping plate are connected through a second bolt; the metal sheet can be in the following states: either of the first and second sub-sheets is located between two first bolts, and the third sub-sheet is located between two second bolts.

As an improvement of the embodiment of the utility model, in the up-down direction, two first bolts all pass the recess.

The embodiment of the utility model provides a sheet metal's test device, including foretell buckling restrained device.

The embodiment of the utility model provides a butt welding sheet metal draws presses fatigue test's buckling restrained device and test device has following advantage: the embodiment of the utility model discloses buckling restrained device and test device that butt welding sheet metal draws and presses fatigue test, this buckling restrained device includes: a first clamp and a second clamp; the first clamp is internally provided with a first upper clamping plate and a first lower clamping plate which are distributed along the vertical direction, and the first upper clamping plate and the first lower clamping plate can simultaneously clamp the first sub-plate and the second sub-plate; the lower surface of the first upper clamping plate and the upper surface of the first lower clamping plate are respectively provided with symmetrical grooves, and the two grooves jointly form a space for accommodating the welding line; the second clamp can clamp the upper and lower surfaces of the third sub-sheet. Thereby enabling fatigue testing of the metal sheet containing the weld.

Drawings

Fig. 1 and fig. 2 are schematic perspective views of a buckling restrained device according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a second upper clamping plate according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a first upper clamping plate according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a second lower clamping plate according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a first lower clamping plate according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of a metal plate according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiment, and the structural, method, or functional changes made by those skilled in the art according to the embodiment are all included in the scope of the present invention.

The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations and positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.

The embodiment of the utility model provides a buckling restrained device of butt welding sheet metal tension-compression fatigue test, sheet metal 2 includes first sub-panel 21, second sub-panel 22 and third sub-panel 23 along left and right direction distribution, and the left end of second sub-panel 22 is connected to first sub-panel 21 through welding seam 24, and the right end of second sub-panel 22 and third sub-panel 23 integrated into one piece; the metal plate 2, which is a fatigue test specimen, is made of metal, such as iron or the like. As shown in fig. 1, 2, 3, 4, 5, 6 and 7, the present invention includes:

a first clamp 11 and a second clamp 12;

a first upper clamping plate 11A and a first lower clamping plate 11B distributed along the vertical direction are arranged in the first clamp 11, and the first upper clamping plate 11A and the first lower clamping plate 11B can simultaneously clamp the first sub-plate 21 and the second sub-plate 22; the lower surface of the first upper clamping plate 11A and the upper surface of the first lower clamping plate 11B are respectively provided with symmetrical grooves 11C, and the two grooves 11C together form a space for accommodating the welding seam 24; here, the two recesses 11C together form a space for accommodating the weld 24, which is larger in size than the weld, so that the weld 24 can be accommodated.

The second jig 12 can clamp the upper and lower surfaces of the third sub-sheet material 23.

Here, one driving device is provided in each of the first and second jigs, and the driving device can drive the first upper clamping plate 11A and the first lower clamping plate 11B to move up and down in the first jig 11, respectively, and can apply a downward force to the first upper clamping plate 11A and an upward force to the first lower clamping plate 11B.

In the case shown in fig. 1 to 6, the first upper holding plate 11A and the first lower holding plate 11B are both ear plates extending in the left-right direction.

Here, when the fatigue test is performed on the metal plate, first, the first sub-plate 21 and the second sub-plate 22 are placed between the first upper clamping plate 11A and the first lower clamping plate 11B (at this time, the two grooves 11C are directly opposite to the weld 24), and the third sub-plate 23 is placed in the second clamp 12; then, the first upper clamping plate 11A is controlled to move downwards, and the first lower clamping plate 11B is controlled to move upwards until the first upper clamping plate 11A and the first lower clamping plate 11B simultaneously clamp the first sub-plate 21 and the second sub-plate 22, at this time, the first upper clamping plate 11A simultaneously applies a downward force to the first sub-plate 21 and the second sub-plate 22, the first lower clamping plate 11B simultaneously applies an upward force to the first sub-plate 21 and the second sub-plate 22, and a space formed by the two grooves 11C accommodates the welding seam 24; meanwhile, controlling the second clamp 12 to clamp the upper and lower surfaces of the third sub-plate 23; and then, mounting the metal plate and the anti-buckling device on a testing device, setting testing parameters, starting loading until the metal plate 2 is damaged, stopping the test, recording a testing result, taking down the sample from the testing machine and disassembling the anti-buckling device.

Alternatively, the grooves 11C each extend in the front-rear direction.

The first upper clamping plate 11A is used for applying downward clamping force to the upper surfaces of the first and second sub-plates; the first lower clamping plate 11B is used for applying upward clamping force to the lower surfaces of the first and second sub-plates;

a second upper clamping plate 12A and a second lower clamping plate 12B which are distributed along the vertical direction are arranged in the second clamp 12, and the second upper clamping plate 12A is used for applying a downward clamping force to the upper surface of the third sub-plate 23; the second lower clamping plate 12B is used to apply an upward clamping force to the lower surface of the third sub-sheet 23.

In the case shown in fig. 1 to 6, the second upper holding plate 12A and the second lower holding plate 12B are both ear plates extending in the left-right direction.

In this embodiment, the right end of the first upper clamping plate 11A is a first sawtooth structure with the tooth tips facing right, and the left end of the second upper clamping plate 12A is matched with the first sawtooth structure and is not in contact with the first sawtooth structure;

the right end part of the first lower clamping plate 11B is of a second sawtooth structure with the tooth tips facing right, and the left end part of the second lower clamping plate 12B is matched with the second sawtooth structure and is not in contact with the second sawtooth structure.

Here, the right end portion of the first upper holding plate 11A has a sawtooth structure with its tooth tip facing right, and the left end portion of the second upper holding plate 12A has a sawtooth structure with its tooth tip facing left, and these two sawtooth structures are matched and do not contact, and in each sawtooth structure, the tooth tip points to the tooth bottom in the other sawtooth structure, where the junction of two adjacent tooth tips is the tooth bottom.

Here, the right end of the first lower holding plate 11B is in a sawtooth structure with a tooth tip facing right, the left end of the second lower holding plate 12B is in a sawtooth structure with a tooth tip facing left, the two sawtooth structures are matched and do not contact, in each sawtooth structure, the tooth tip points to the tooth bottom in the other sawtooth structure, wherein the joint of two adjacent tooth tips is the tooth bottom.

Specifically, in the case shown in fig. 1, 2, 3, 4, 5 and 6, the right end of the first upper clamping plate 11A is a V-shaped protrusion, and the tip of the first upper clamping plate 11A faces to the right, and the left end of the second upper clamping plate 12A is a V-shaped recess which is matched with the V-shaped protrusion of the first upper clamping plate 11A; the left end of the second lower clamping plate 12B is a V-shaped bulge, the tip of the second lower clamping plate faces to the left, and the right end of the first lower clamping plate 11B is a V-shaped concave part which is matched with the V-shaped bulge in the second lower clamping plate 12B.

Here, the gap between the first and second upper clamping plates and the gap between the first and second lower clamping plates leave a space for the deformation of the metal plate material 2 in the front-rear direction.

In this embodiment, the tooth tips of the first and second saw tooth structures are staggered in the front-rear direction. Here, the buckling of the fatigue test piece at the gap is avoided due to the staggered arrangement of the tooth tips in the first and second saw tooth structures.

In the embodiment, the distance between the gaps of the first and second upper clamping plates in the left-right direction is a constant value LA, and LA is more than or equal to 1mm and less than or equal to 2 mm; the distance between the first and second upper clamping plates in the left-right direction is a constant value LA at different positions of the gap.

The distance between the gaps of the first lower clamping plate and the second lower clamping plate in the left-right direction is a constant value LB, and LB is more than or equal to 1mm and less than or equal to 2 mm. The distance between the first and second lower clamping plates in the left-right direction is constant LB.

In the present embodiment, in the first upper clamping plate 11A, the groove 11C penetrates the first upper clamping plate 11A in the front-rear direction, and in the first lower clamping plate 11B, the groove 11C penetrates the first lower clamping plate 11B in the front-rear direction.

In this implementation, the groove 11C in the first upper clamping plate 11A is an arc-shaped groove, and the groove 11C in the first lower clamping plate 11B is an arc-shaped groove.

In this embodiment, the front end portions of the first upper clamping plate 11A and the first lower clamping plate 11B are connected by the first bolt 31, and the rear end portions of the first upper clamping plate 11A and the first lower clamping plate 11B are connected by the first bolt 31;

the front end parts of the second upper clamping plate 12A and the second lower clamping plate 12B are connected through a second bolt 32, and the rear end parts of the second upper clamping plate 12A and the second lower clamping plate 12B are connected through a second bolt 32;

the metal plate 2 can be in the following states: either of the first and second sub-sheets 22 is positioned between two first bolts 31, and the third sub-sheet 23 is positioned between two second bolts 32.

Here, as shown in fig. 1 to 6, the first sub-plate 21, the second sub-plate 22 and the weld 24 together constitute a plate body having a shape corresponding to the shape of the first upper clamping plate 11A and the shape corresponding to the shape of the first lower clamping plate 11B. Likewise, the shape of the second upper clamping plate 12A and the shape of the second lower clamping plate 12B both conform to the shape of the third sub-sheet 23.

As shown in fig. 1 to 6, a protruding plate is provided at the front end portion of each of the first upper clamping plate 11A and the first lower clamping plate 11B, a through hole is provided at each of the two protruding plates, the two through holes correspond to each other up and down, and a bolt is used to pass through the two through holes downward, and then a portion of the screw located at the lower side of the first lower clamping plate 11B is connected to the nut, and it can be understood that in the bolt, the size of the head of the screw is larger than that of the through hole, and at the same time, the size of the nut is larger than that of the through hole.

As shown in fig. 1 to 6, a protruding plate is provided at each of rear end portions of the first upper clamping plate 11A and the first lower clamping plate 11B, through holes are provided at each of the two protruding plates, the two through holes correspond to each other up and down, and a bolt is used to pass through the two through holes downward, and then a portion of the screw located at the lower side of the first lower clamping plate 11B is connected to the nut, and it can be understood that in the bolt, the size of the head of the screw is larger than that of the through hole, and at the same time, the size of the nut is larger than that of the through hole.

As shown in fig. 1 to 6, a protruding plate is provided at the front end portion of each of the second upper clamping plate 12A and the second lower clamping plate 12B, through holes are provided at both the protruding plates, the through holes correspond up and down, and a bolt is used to pass through the through holes downward, and then a portion of the screw located at the lower side of the second lower clamping plate 1BB is connected to a nut, and it can be understood that in the bolt, the size of the head of the screw is larger than that of the through hole, and at the same time, the size of the nut is larger than that of the through hole.

As shown in fig. 1 to 6, a protruding plate is provided at each of rear end portions of the second upper clamping plate 12A and the second lower clamping plate 12B, through holes are provided at each of the two protruding plates, the two through holes correspond to each other up and down, and a bolt is used to pass through the two through holes downward, and then a portion of the screw located at the lower side of the second lower clamping plate 12B is connected to a nut, and it can be understood that in the bolt, the size of the head of the screw is larger than that of the through hole, and at the same time, the size of the nut is larger than that of the through hole.

In the present embodiment, both the first bolts 31 pass through the grooves 11C in the up-down direction.

The embodiment two of the utility model provides a sheet metal's test device, including in embodiment one the buckling restrained device.

It should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be appreciated by those skilled in the art that the specification as a whole may be appropriately combined to form other embodiments as will be apparent to those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. The buckling prevention device for the tension-compression fatigue test of the butt-welded metal plate comprises a first sub-plate (21), a second sub-plate (22) and a third sub-plate (23), wherein the first sub-plate (21), the second sub-plate (22) and the third sub-plate (23) are distributed along the left-right direction, the left end of the second sub-plate (22) is connected to the first sub-plate (21) through a welding seam (24), and the right end of the second sub-plate (22) and the third sub-plate (23) are integrally formed; it is characterized by comprising the following steps:

a first clamp (11) and a second clamp (12);

a first upper clamping plate (11A) and a first lower clamping plate (11B) which are distributed along the vertical direction are arranged in the first clamp (11), and the first upper clamping plate (11A) and the first lower clamping plate (11B) can simultaneously clamp the first sub-plate (21) and the second sub-plate (22); symmetrical grooves (11C) are respectively formed in the lower surface of the first upper clamping plate (11A) and the upper surface of the first lower clamping plate (11B), and the two grooves (11C) jointly form a space for accommodating the welding seam (24);

the second clamp (12) can clamp the upper surface and the lower surface of the third sub-plate (23).

2. The anti-buckling device of claim 1, wherein:

the first upper clamping plate (11A) is used for applying downward clamping force to the upper surfaces of the first sub-plate and the second sub-plate; the first lower clamping plate (11B) is used for applying upward clamping force to the lower surfaces of the first sub-plate and the second sub-plate;

a second upper clamping plate (12A) and a second lower clamping plate (12B) which are distributed along the vertical direction are arranged in the second clamp (12), and the second upper clamping plate (12A) is used for applying downward clamping force to the upper surface of the third sub-plate (23); the second lower clamping plate (12B) is used for applying upward clamping force to the lower surface of the third sub-plate (23).

3. The buckling-restrained device according to claim 2, wherein:

the right end part of the first upper clamping plate (11A) is of a first sawtooth structure with the tooth tips facing right, and the left end part of the second upper clamping plate (12A) is matched with the first sawtooth structure and is not contacted with the first sawtooth structure;

the right end part of the first lower clamping plate (11B) is of a second sawtooth structure with the tooth tips facing right, and the left end part of the second lower clamping plate (12B) is matched with the second sawtooth structure and is not contacted with the second sawtooth structure.

4. The buckling-restrained device according to claim 3, wherein:

in the front-back direction, the tooth tips of the first and second sawtooth structures are staggered.

5. The buckling-restrained device according to claim 3, wherein:

the distance between the gaps of the first upper clamping plate and the second upper clamping plate in the left-right direction is a constant value LA, and LA is more than or equal to 1mm and less than or equal to 2 mm;

the distance of the gap between the first lower clamping plate and the second lower clamping plate in the left-right direction is a constant value LB, and LB is more than or equal to 1mm and less than or equal to 2 mm.

6. The anti-buckling device of claim 1, wherein:

in the first upper holding plate (11A), a groove (11C) penetrates the first upper holding plate (11A) in the front-rear direction,

in the first lower clamping plate (11B), a groove (11C) penetrates the first lower clamping plate (11B) in the front-rear direction.

7. The anti-buckling device of claim 1, wherein:

the groove (11C) in the first upper clamping plate (11A) is an arc-shaped groove, and the groove (11C) in the first lower clamping plate (11B) is an arc-shaped groove.

8. The buckling-restrained device according to claim 2, wherein:

the front end parts of the first upper clamping plate (11A) and the first lower clamping plate (11B) are connected through a first bolt (31), and the rear end parts of the first upper clamping plate (11A) and the first lower clamping plate (11B) are connected through the first bolt (31);

the front end parts of the second upper clamping plate (12A) and the second lower clamping plate (12B) are connected through a second bolt (32), and the rear end parts of the second upper clamping plate (12A) and the second lower clamping plate (12B) are connected through a second bolt (32);

the metal sheet (2) can be in the following states: either the first or the second sub-sheet (22) is positioned between two first bolts (31), and the third sub-sheet (23) is positioned between two second bolts (32).

9. The buckling-restrained device according to claim 2, wherein:

in the up-down direction, both first bolts (31) pass through the grooves (11C).

10. A device for testing sheet metal, comprising an anti-buckling device according to any one of claims 1 to 9.

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