CN216955536U

CN216955536U - Butt joint welding shear test piece

Info

Publication number: CN216955536U
Application number: CN202123373290.9U
Authority: CN
Inventors: 赵晓辉
Original assignee: AVIC First Aircraft Institute
Current assignee: AVIC First Aircraft Institute
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-07-12
Anticipated expiration: 2031-12-29

Abstract

The application belongs to the technical field of static test of airplanes, and particularly relates to a butt joint welding shear test piece. This test piece includes first flat board (1) and second flat board (2), first flat board (1) with the second flat board (2) all includes clamping section (3) and test section (4), test section (4) of second flat board (2) have slotted hole (41), the tip of test section (4) of first flat board (1) can stretch into slotted hole (41) in, and in slotted hole (41) along width direction's both sides respectively with the welding of slotted hole inner wall, a fixture is connected respectively in clamping section (3) of first flat board (1) and second flat board (2), fixture connects tensile mechanism, the cross sectional dimension of test section (4) of first flat board (1) or second flat board (2) is less than the cross sectional dimension of clamping section (3). The method and the device can well simulate the damage forms of the welding seams of different forms and different thicknesses of the flat plates under the shearing load, and obtain more accurate test data.

Description

Butt joint welding shear test piece

Technical Field

The application belongs to the technical field of static tests of airplanes, and particularly relates to a butt joint welding shear test piece.

Background

In the manufacturing industry including military and civil fields such as aviation, aerospace and navigation, a flat butt welding structure is often adopted, and during use, the flat butt welding structure bears a shearing load parallel to the welding length direction, the shearing load has a destructive effect on a welding joint, and therefore the capability of bearing the load in the direction from a welding seam must be considered. However, at present, the shear resistance of the flat butt joint is not subject to the test standard, and no test piece is available for testing.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a butt joint welding shear test piece, including the metal flat plate of different thickness, different appearance size, dull and stereotyped butt joint department forms the welding seam.

This application butt joint welding shear test spare, it is dull and stereotyped including first flat board and second, first flat board with the second flat board all includes centre gripping section and experimental section, the experimental section of second flat board has the slotted hole, the tip of the experimental section of first flat board can stretch into in the slotted hole, and in the slotted hole along width direction both sides respectively with the welding of slotted hole inner wall forms first welding seam and second welding seam, first flat board with a fixture is connected respectively to the dull and stereotyped centre gripping section of second, fixture connects tension mechanism, first flat board or the cross sectional dimension of the experimental section of second flat board is less than the cross sectional dimension of centre gripping section.

Preferably, the bottom surfaces of the test sections of the first and second flat plates at the butt joint are parallel to each other, the bottom surface of the flat plate is a lower end surface of the flat plate relative to a thickness direction, and the thickness direction is a clamping force application direction of the clamping mechanism.

Preferably, the test section of the first plate and the test section of the second plate are located in the same plane at the bottom surface of the plate at the butt joint.

Preferably, the thickness of the clamping section is greater than the thickness of the test section, and the clamping section transitions to the test section through an arc-shaped surface in the thickness direction.

Preferably, the thickness of the clamping section is at least three times the thickness of the test section.

Preferably, the clamping section of the second flat plate is of a table structure with an inclined plane in the width direction, one end close to the test section is a wider end, the other end is a narrower end, and the width of the narrower end is greater than that of the test section of the first flat plate.

Preferably, the clamping section has a flange for being clamped by the clamping means.

Preferably, three-way strain gauges are adhered to the test sections of the first flat plate and the second flat plate at positions close to the first welding seam and the second welding seam.

Preferably, the depth of the slot is at least 1/4 times the length of the first plate, and the width of the test section of the second plate is at least twice the width of the slot.

The application provides a set of test piece form, the destruction form of the dull and stereotyped welding seam of simulation different forms, different thickness that can be fine under shear load reduces the influence of other factors, obtains comparatively accurate test data. The test piece is only provided with two parts which are connected together by welding, the structure is simple, the batch production is convenient, the structure of the test piece is open and convenient, and the test piece can be directly clamped by a mechanical/strength testing machine for carrying out a loading test without additionally designing a clamp.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a butt joint weld shear test piece of the present application.

FIG. 2 is a schematic view of section A-A of the embodiment of FIG. 1 of the present application.

Wherein, 1-a first flat plate, 2-a second flat plate, 3-a clamping section, 4-a testing section, 5-a first welding line, 6-a second welding line, 101-a flat plate bottom surface and 41-a slotted hole.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are implementations that are part of this application and not all implementations. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

The application provides a butt joint welding shear test spare, as shown in fig. 1 and fig. 2, including first flat board 1 and second flat board 2, first flat board 1 with second flat board 2 all includes clamping section 3 and test section 4, test section 4 of second flat board 2 has slotted hole 41, the tip of test section 4 of first flat board 1 can stretch into in the slotted hole 41, and in the both sides of slotted hole 41 along width direction respectively with the welding of slotted hole inner wall forms first welding seam 5 and second welding seam 6, first flat board 1 with a fixture is connected respectively to clamping section 3 of second flat board 2, fixture connects tensile mechanism, first flat board 1 or the cross sectional dimension of test section 4 of second flat board 2 is less than the cross sectional dimension of clamping section 3.

This application only links together through the welding form by a set of two metal flat plates, and simple structure is convenient for batch manufacturing production, has set up centre gripping section and test section, and integrated into one piece is convenient for centre gripping and loading. The welding seam inspected in the test section is located at the position of the minimum section, when the flat plate is subjected to tensile load, the maximum stress of the flat plate is generated near the welding seam, and the flat plate is easier to break relative to other sections, so that the tensile strength measured in the test is very close to the shearing load of the welding seam, and the result is accurate.

In some alternative embodiments, the flat bottom surfaces 101 of the test sections of the first flat plate 1 and the second flat plate 2 at the joint are parallel to each other, the flat bottom surface 101 is the lower end surface of the flat plate relative to the thickness direction, and the thickness direction is the clamping force application direction of the clamping mechanism.

In some alternative embodiments, the test sections of the first plate 1 and the plate bottom surface 101 of the second plate 2 at the butt joint are located in the same plane.

In some alternative embodiments, the thickness of the clamping section 3 is greater than the thickness of the test section 4, and in the thickness direction, the clamping section 3 transitions into the test section 4 via an arc surface.

In some alternative embodiments, the thickness of the clamping section 3 is at least three times the thickness of the trial section 4.

In some alternative embodiments, the clamping section 3 of the second flat plate has a platform structure with an inclined surface in the width direction, one end close to the test section 4 is a wider end, and the other end is a narrower end, and the width of the narrower end is greater than that of the test section 4 of the first flat plate 1.

In some alternative embodiments, the clamping segment has a flange for being clamped by the clamping mechanism.

In some optional embodiments, the test sections 4 of the first and second flat plates 1 and 2 are adhered with three-way strain gauges near the first and

second weld seams

5 and 6.

In some alternative embodiments, the depth of the slot 41 is at least 1/4 times the length of the first plate 1, and the width of the trial section of the second plate 2 is at least twice the width of the slot 41.

Table 1 shows a plurality of test piece forms of this application butt joint welding shear test piece, and every test piece size is different to can obtain a set of experimental data, be convenient for calculate shear strength.

Table 1 test piece specification table

During testing, a three-way strain gauge is pasted on a flat test section of the flat test section at a certain distance from a welding line, then a clamping section of a test piece is clamped on a chuck of a tensile testing machine, the test section is ensured to be positioned between an upper chuck and a lower chuck, and then load is slowly applied until the test piece is broken. Recording the fracture position, drawing a stress-strain diagram, and calculating the shear strength of the welding seam of the flat welding joint

The application can well simulate the damage form of the welding lines of different forms and different thickness plates under the shearing load, reduces the influence of other factors, obtains more accurate test data, and has a simple structure, thereby facilitating batch production.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A butt joint welding shear test piece is characterized by comprising a first flat plate (1) and a second flat plate (2), the first flat plate (1) and the second flat plate (2) both comprise a clamping section (3) and a testing section (4), the test section (4) of the second plate (2) has a slot (41), the end of the test section (4) of the first plate (1) can extend into the slot (41), and both sides of the slot hole (41) along the width direction are respectively welded with the inner wall of the slot hole to form a first welding seam (5) and a second welding seam (6), the clamping sections (3) of the first flat plate (1) and the second flat plate (2) are respectively connected with a clamping mechanism, the clamping mechanism is connected with the stretching mechanism, and the section size of the test section (4) of the first flat plate (1) or the second flat plate (2) is smaller than that of the clamping section (3).

2. The butt joint weld shear test piece according to claim 1, wherein the flat bottom surfaces (101) of the test sections of the first flat plate (1) and the second flat plate (2) at the butt joint are parallel to each other, the flat bottom surfaces (101) being lower end surfaces of the flat plates with respect to a thickness direction, the thickness direction being a clamping force application direction of the clamping mechanism.

3. The butt joint weld shear test piece of claim 2, wherein the test section of the first plate (1) and the plate bottom surface (101) of the second plate (2) at the butt joint are in the same plane.

4. The butt joint weld shear test piece of claim 1, wherein the clamping section (3) has a thickness greater than the thickness of the test section (4), the clamping section (3) transitioning in thickness to the test section (4) through an arcuate surface.

5. The butt joint weld shear test piece of claim 4, wherein the thickness of the clamping section (3) is at least three times the thickness of the test section (4).

6. The butt joint weld shear test piece of claim 1, wherein the clamping section (3) of the second flat plate has a truncated cone structure with an inclined plane in the width direction, and one end near the test section (4) is a wider end and the other end is a narrower end, and the width of the narrower end is larger than that of the test section (4) of the first flat plate (1).

7. The butt joint weld shear test piece of claim 1, wherein the clamping section has a flange for being clamped by the clamping mechanism.

8. The butt joint weld shear test piece of claim 1, wherein three-way strain gages are affixed to the test sections (4) of the first (1) and second (2) plates adjacent to the first (5) and second (6) welds.

9. The butt joint weld shear test piece of claim 1, wherein the depth of the slot (41) is at least 1/4 times the length of the first flat plate (1), and the width of the test section of the second flat plate (2) is at least twice the width of the slot (41).