CN216955481U

CN216955481U - T-shaped joint weld joint tensile test piece

Info

Publication number: CN216955481U
Application number: CN202123373307.0U
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 tests of airplanes, and particularly relates to a T-shaped joint weld joint tensile test piece. This test piece includes first dull and stereotyped (1) and second flat board (2), first dull and stereotyped (1) all includes clamping section (3) and experimental section (4) with second flat board (2), experimental section (4) of first dull and stereotyped (1) are different with experimental section (4) thickness of second flat board (2), and form the overlap joint region in the butt joint of tip, at least part welding on the outer contour line of overlap joint region, a fixture is connected respectively in clamping section (3) of first dull and stereotyped (1) and second flat board (2), fixture connects tensile mechanism, the cross sectional dimension of experimental section (4) of first dull and stereotyped (1) or second flat board (2) is less than the cross sectional dimension of this plately structured clamping section (3). The method and the device can well simulate the damage form of the T-shaped joint welding seam of flat plates with different forms and different thicknesses under the tensile load, and obtain more accurate test data.

Description

T-shaped joint weld joint tensile test piece

Technical Field

The application belongs to the technical field of static tests of airplanes, and particularly relates to a T-shaped joint weld joint tensile test piece.

Background

In the military and civil fields of manufacturing industry including aviation, aerospace, navigation and the like, a T-shaped joint welding structure is often adopted due to structural form limitation, namely two flat plates are directly welded in a butt welding mode, the structural form is used for bearing tensile load perpendicular to the welding length direction, the load has destructive effect on a welding joint, and therefore the capability of a welding seam for bearing the load in the direction must be considered. However, the tensile strength of the T-shaped 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 T-shaped joint weld joint tensile test piece, which comprises metal flat plates with different thicknesses and different appearance sizes, wherein a weld joint is formed at the periphery of the butt joint of the flat plates.

The utility model provides a T type connects welding seam tensile 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 first flat board with the experimental section thickness of second flat board is different, the experimental section of first flat board with the butt joint of the experimental section tip of second flat board forms the overlap joint region at least part welds on the outer contour line of overlap joint region, first flat board with a fixture is connected respectively to the dull and stereotyped centre gripping section of second, fixture connects tensile mechanism, first flat board or the cross sectional dimension of the dull and stereotyped experimental section of second is less than the cross sectional dimension of the centre gripping section of this plate structure.

Preferably, the flat plate surfaces of the test section of the first flat plate and the test section of the second flat plate at the lap joint are parallel to each other, the flat plate surface is an upper end surface or a 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.

Preferably, the thickness of the test section of the first flat plate is smaller than that of the test section of the second flat plate, after the second flat plate is butted with the first flat plate, two side edges of the first flat plate are respectively away from two side edges of the second flat plate by a certain distance in the thickness direction, the two side edges of the first flat plate form part of an outer contour line of the lap joint area, and at least a first welding line and a second welding line are formed on the outer contour line corresponding to the two side edges of the first flat plate.

Preferably, the test section end of the first flat plate is located at the very middle of the test section end of the second flat plate.

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

Preferably, the width of the clamping section of the first flat plate or the second flat plate is larger than the width of the test section of the flat plate, and the clamping section of any flat plate is transited to the test section through an arc-shaped surface in the width direction.

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

Preferably, the three-way strain gauge is adhered to the test sections of the first and second flat plates near the welding area.

The application provides a set of test piece, the destruction form of simulation different forms, different thickness flat board T shape joint welding seam under tensile load that can be fine reduces the influence of other factors, conveniently detects the intensity performance of welding seam under tensile loading form, gives the tensile strength of welding seam. This test piece only has two parts to pass through welded connection and is in the same place, and simple structure is convenient for batch production, and the test piece structure is open, convenient, need not extra design anchor clamps alright directly carry out centre gripping and loading with mechanics/strength testing machine.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a T-joint weld tensile test piece of the present application.

Fig. 2 is a side view of the embodiment of fig. 1 of the present application.

The method comprises the following steps of 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 and 101-a flat plate surface.

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 some, but not all embodiments of the present application. 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 T type connects welding seam tensile test spare, as shown in fig. 1-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, first flat board 1's test section 4 with second flat board 2's test section 4 thickness is different, first flat board 1's test section 4 with the butt joint of second flat board 2's test section 4 tip forms the overlap joint region at least part welds on the outer contour line of overlap joint region, first flat board 1 with clamping mechanism is connected respectively to second flat board 2's clamping section 3, clamping mechanism connects tensile mechanism, first flat board 1 or the cross sectional dimension of second flat board 2's test section 4 is less than the cross sectional dimension of this flat structure's clamping section 3.

The utility model provides a test piece includes two flats, and two flats form an overall structure through the welding mode, and the welding will guarantee that the bottom surface of two flats is parallel, and the intersection forms the welding seam. The test piece is provided with a clamping section and a test section, the test section is positioned in the middle of the clamping section, the sectional area of the test section is smaller than that of the clamping section, and the welding line is positioned in the middle of the test section and has the smallest sectional area.

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 test piece is open and convenient in flat structure form, and can be directly clamped by a mechanical/strength testing machine for carrying out loading test without additionally designing a clamp. 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 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 tensile load of the welding seam, and the result is accurate.

In some alternative embodiments, the plate surfaces 101 of the first plate 1 and the second plate 2 at the overlapping position are parallel to each other, the plate surfaces 101 are the upper end surface or the lower end surface of the plate relative to the thickness direction, and the thickness direction is the clamping force application direction of the clamping mechanism.

In some optional embodiments, the thickness of the test section of the first flat plate 1 is smaller than the thickness of the test section of the second flat plate 2, after the second flat plate 2 is butted with the first flat plate 1, two side edges of the first flat plate 1 are respectively spaced from two side edges of the second flat plate 2 in the thickness direction, the two side edges of the first flat plate 1 form a part of an outer contour line of the lap joint region, and a first weld 5 and a second weld 6 are formed on the outer contour line corresponding to at least the two side edges of the first flat plate 1.

In some alternative embodiments, the end of the test section of the first flat plate 1 is located in the middle of the end of the test section of the second flat plate 2.

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

For the examples given in fig. 1 and 2, the test piece construction dimensions are given in table 1.

Table 1 test piece dimensions

In some alternative embodiments, the width of the clamping section 3 of the first or second plate 1, 2 is greater than the width of the test section 4 of the plate, and the clamping section 3 of either plate transitions in the width direction through an arc-shaped surface onto the test section 4.

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

In some optional embodiments, the three-way strain gauge is adhered to the test sections 4 of the first flat plate 1 and the second flat plate 2 near the welding area. 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 tensile load is slowly applied until the test piece is broken. And recording the fracture position, drawing a stress-strain diagram, and calculating the tensile strength of the flat plate welding joint.

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 T-shaped joint weld joint tensile 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 thickness of the test section (4) of the first flat plate (1) is different from that of the test section (4) of the second flat plate (2), the end parts of the test section (4) of the first flat plate (1) and the test section (4) of the second flat plate (2) are butted to form a lap joint area, at least part of the outer contour line of the lap joint area is welded, 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 a 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) of the flat plate structure.

2. The T-joint weld tensile test piece according to claim 1, wherein the flat plate faces (101) of the test sections of the first flat plate (1) and the second flat plate (2) at the overlapping position are parallel to each other, the flat plate faces (101) are upper end faces or lower end faces of the flat plates relative to a thickness direction, and the thickness direction is a clamping force application direction of the clamping mechanism.

3. The T-joint weld tensile test piece according to claim 1, wherein the test section thickness of the first flat plate (1) is smaller than that of the second flat plate (2), after the second flat plate (2) is butted with the first flat plate (1), two side edges of the first flat plate (1) are respectively away from two side edges of the second flat plate (2) in a certain distance in the thickness direction, two side edges of the first flat plate (1) form part of an outer contour line of the lap joint area, and a first weld (5) and a second weld (6) are formed on the outer contour line corresponding to at least two side edges of the first flat plate (1).

4. The T-joint weld tensile test piece of claim 3, wherein the test section end of the first flat plate (1) is located at the middle of the test section end of the second flat plate (2).

5. T-joint weld tensile test piece according to claim 4, characterized in that the clamping section (3) has a thickness which is at least three times the thickness of the test section (4).

6. The T-joint weld tensile test piece according to claim 1, wherein the width of the clamping section (3) of the first flat plate (1) or the second flat plate (2) is greater than the width of the test section (4) of the flat plate, and the clamping section (3) of either flat plate transitions in the width direction to the test section (4) through an arc-shaped surface.

7. A T-joint weld tensile test member as set forth in claim 1, wherein said clamping section has a flange for being clamped by said clamping mechanism.

8. The T-joint weld tensile test piece of claim 1, wherein the test sections (4) of the first flat plate (1) and the second flat plate (2) are affixed with three-way strain gauges near the welded area.