CN216955479U

CN216955479U - Lap weld strength test piece

Info

Publication number: CN216955479U
Application number: CN202123367037.2U
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 lap weld strength test piece. The test piece comprises a first flat plate (1) and a second flat plate (2), wherein the first flat plate (1) and the second flat plate (2) respectively comprise a clamping section (3) and a test section (4), the test section (4) of the first flat plate (1) is in lap joint with the test section (4) of the second flat plate (2) in the thickness direction, at least part of the outer contour line of the lap joint area is welded, the first flat plate (1) is connected with the clamping section (3) of the second flat plate (2) respectively through a clamping mechanism, the clamping mechanism is connected with a stretching mechanism, and the cross 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. The method and the device can well simulate the damage form of the lap weld of flat plates with different forms and different thicknesses under the shearing load, and obtain more accurate test data.

Description

Lap weld strength test piece

Technical Field

The application belongs to the technical field of static tests of airplanes, and particularly relates to a lap weld strength test piece.

Background

In the manufacturing industry including the military and civil fields of aviation, aerospace, navigation and the like, a flat plate lap welding structure is often adopted, namely two flat plates are lapped together in a welding mode, the structural form is that a welding seam can bear shear load in the using process, and the load has destructive effect on a welding joint, so that the capability of the welding seam for bearing the shear load must be considered. However, at present, the tensile capacity 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 lap weld strength test piece, including the metal flat plate of different thickness, different appearance size, dull and stereotyped overlap joint forms the welding seam.

The utility model provides an overlap joint welding seam strength test piece, it is dull and stereotyped including first flat board and second, first flat board with the second flat board all includes clamping section and test section, the test section of first flat board with the test section of second flat board is the overlap joint each other on the thickness direction, and at least part welds on the regional outer contour line of overlap joint, first flat board with a fixture is connected respectively to the clamping section of second flat board, fixture connects tensile mechanism, first flat board or the cross sectional dimension of the test section of second flat board is less than the cross sectional dimension of the clamping section of this flat 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 width of the test section of the first flat plate is greater than the width of the test section of the second flat plate, the second flat plate is lapped on the first flat plate, and in the width direction, two side edges of the second flat plate are respectively away from two side edges of the first flat plate by a certain distance, the two side edges of the second flat plate form part of outer contour lines of the lapped area, and at least a first welding line and a second welding line are formed on the outer contour lines corresponding to the two side edges of the second flat plate.

Preferably, the test section width of the first flat plate is the same as the test section width of the second flat plate, when the second flat plate is lapped on the first flat plate, an end of the second flat plate in the length direction forms an outer contour line of the lapping region, and a third weld is formed on an outer contour line corresponding to the end of the second flat plate in the length direction.

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 form, the destruction form of the lap weld of different forms, different thickness flat board that can be fine under shear load reduces the influence of other factors, obtains comparatively accurate test data. The test piece has the advantages that only two parts are connected together in a welding and overlapping mode, the structure is simple, batch production is facilitated, the structure of the test piece is open and convenient, and clamping and loading tests can be carried out by using a mechanical/strength testing machine without additionally designing a clamp.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of the lap weld strength test piece of the present application.

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

FIG. 3 is a schematic structural view of another preferred embodiment of the lap weld strength test piece of the present application.

Fig. 4 is a side view of the embodiment of fig. 3 of the present application.

The welding 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, 7-a third 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 based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

The application provides a lap weld strength test piece, as shown in fig. 1-4, 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 the test section 4 with the test section 4 of second flat board 2 is overlap joint each other on thickness direction, and at least part welds on the regional outer contour line of overlap joint, first flat board 1 with clamping mechanism is connected respectively to the clamping section 3 of second flat board 2, clamping mechanism connects tensile mechanism, first flat board 1 or the cross sectional dimension of the test section 4 of second flat board 2 is less than the cross sectional dimension of the clamping section 3 of this plate structure.

The utility model provides a metal flat structure tensile test spare 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 multichannel 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, simple structure, and the batch production of being convenient for has set up and has added and hold 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.

Referring to fig. 2 or fig. 4, 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.

Referring to fig. 1, in some optional embodiments, a test section width of the first flat plate 1 is greater than a test section width of the second flat plate 2, the second flat plate 2 is overlapped on the first flat plate 1, two sides of the second flat plate 2 are respectively spaced from two sides of the first flat plate 1 in a certain distance in a width direction, two sides of the second flat plate 2 form a part of an outer contour line of the overlapped area, and a first weld 5 and a second weld 6 are formed on the outer contour line corresponding to at least two sides of the second flat plate 2.

Referring to fig. 3, in some alternative embodiments, the width of the test section of the first flat plate 1 is the same as the width of the test section of the second flat plate 2, when the second flat plate 2 is lapped on the first flat plate 1, the end of the second flat plate 2 in the length direction forms an outer contour line of the lapping area, and the outer contour line corresponding to the end of the second flat plate 2 in the length direction forms a third weld 7.

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

For the test pieces in the form of the construction of fig. 1-2, the test piece dimensions are given in table 1.

TABLE 1 test piece size (a)

For the test pieces in the form of the constructions of fig. 3-4, the test piece dimensions are given in table 2.

TABLE 1 test piece size (b)

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 alternative embodiments, the three-way strain gauges are adhered to the test sections 4 of the first and second flat plates 1 and 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. The utility model provides a lap weld strength test spare, its characterized in that includes first flat board (1) and second flat board (2), first flat board (1) with second flat board (2) all include clamping section (3) and test section (4), the test section (4) of first flat board (1) with test section (4) of second flat board (2) overlap joint each other in the thickness direction, and at least part welds on the outer contour line in overlap joint region, first flat board (1) with clamping section (3) of second flat board (2) are connected a fixture respectively, fixture connects tensile mechanism, the cross sectional dimension of first flat board (1) or the test section (4) of second flat board (2) is less than the cross sectional dimension of this plate structure's clamping section (3).

2. The lap weld strength test piece according to claim 1, wherein the plate faces (101) of the test sections of the first plate (1) and the second plate (2) at the lap joint are parallel to each other, the plate faces (101) being upper end faces or lower end faces of the plates with respect to a thickness direction, the thickness direction being a direction in which a clamping force of the clamping mechanism is applied.

3. The lap weld strength test piece according to claim 1, wherein the test section width of the first plate (1) is greater than the test section width of the second plate (2), the second plate (2) is lapped on the first plate (1), and in the width direction, two sides of the second plate (2) are respectively at a certain distance from two sides of the first plate (1), two sides of the second plate (2) form part of the outer contour line of the lapping area, and at least a first weld (5) and a second weld (6) are formed on the outer contour line corresponding to the two sides of the second plate (2).

4. The lap weld strength test piece according to claim 1, characterized in that the test section width of the first flat plate (1) is the same as the test section width of the second flat plate (2), when the second flat plate (2) is lapped on the first flat plate (1), the end of the second flat plate (2) along the length direction forms the outer contour line of the lapping area, and the outer contour line corresponding to the end of the second flat plate (2) along the length direction forms the third weld (7).

5. The lap weld strength test piece of claim 4, characterized in that the thickness of the clamping section (3) is at least three times the thickness of the test section (4).

6. The lap weld strength test piece according to claim 1, characterized in that 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. The lap weld strength test piece of claim 1, wherein said clamping section has a flange for being clamped by said clamping mechanism.

8. The lap weld strength test piece of claim 1, characterized in that three-way strain gauges are affixed to the test sections (4) of the first and second flat plates (1, 2) near the weld area.