CN212844669U

CN212844669U - Special sample clamp for shear tensile test of friction stir spot welding spot

Info

Publication number: CN212844669U
Application number: CN202021212636.XU
Authority: CN
Inventors: 张起雨; 杨峰; 韩磊
Original assignee: Xuzhou University of Technology
Current assignee: Xuzhou University of Technology
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-03-30
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses a special sample clamp for a friction stir spot welding spot shear tensile test, which comprises an upper L-shaped clamping plate and a lower L-shaped clamping plate; the upper L-shaped clamping plate and the width adjusting screw are in threaded connection with the upper L-shaped plate connecting hole through a screw; one end of the width adjusting screw rod is connected with a holding rod; the other end of the width adjusting screw is connected with a clamping plate in a matching way; the clamping plate is connected with the upper L-shaped clamping plate in a matched manner through the rectangular groove; a width adjusting clamp plate is connected in the rectangular groove; the side end of the upper L-shaped clamping plate is connected with an upper L-shaped clamping plate bulge; one end of the lower L-shaped clamping plate is connected with a lower L-shaped clamping plate bulge; the upper L-shaped clamping plate and the lower L-shaped clamping plate are connected with the clamping plate hole through a height adjusting bolt; the plane of the upper L-shaped clamping plate is provided with a connecting hole of a height adjusting device. Different size parameter test pieces are more convenient to clamp in the spot welding shear test, the test data are more accurate, the production efficiency is high, and the cost is low.

Description

Special sample clamp for shear tensile test of friction stir spot welding spot

Technical Field

The utility model relates to a special sample anchor clamps for friction stir spot welding solder joint shear tensile test belongs to welding technique test technical field.

Background

The friction stir spot welding has the characteristics of light weight, high static strength, stable performance, easy realization of automation and the like, and belongs to a pollution-free green welding method. The friction stir spot welding realizes the connection of light high-strength alloys such as aluminum, magnesium and the like through the press-in, rotation and connection of a stirring head, in particular to the connection of dissimilar metals. The technology is widely applied to the fields of aviation, aerospace, automobile manufacturing and the like.

At present, the national standard for the spot welding shear test stipulates that an adding plate can be welded at the clamping end part of a test piece in order to avoid the deviation of a load axis and the central line of the test piece when the test piece is loaded, but the deformation of the test piece is easily caused by welding the adding plate. The method is used for analyzing and designing the problems of clamping and fixing the sample at present so as to reduce the influence of clamping and fixing on welding spot shearing test.

SUMMERY OF THE UTILITY MODEL

Problem to above-mentioned prior art exists, the utility model provides a special sample anchor clamps for friction stir spot welding solder joint shear tensile test, it is more convenient at the clamping to different size parameter test pieces among the spot welding shear test, test data is more accurate, and production efficiency is high, and is with low costs.

In order to realize the purpose, the utility model discloses a technical scheme is: a special sample clamp for a friction stir spot welding spot shear tensile test comprises an upper L-shaped clamping plate and a lower L-shaped clamping plate; the upper L-shaped clamping plate is in threaded connection with the width adjusting screw rod through a screw rod and an upper L-shaped plate connecting hole; one end of the screw rod is connected with a holding rod; the other end of the width adjusting screw is connected with a clamping plate in a matching way; the clamping plate is connected with the upper L-shaped clamping plate in a matched manner through a rectangular groove; the rectangular groove is internally connected with a width adjusting clamp plate; the side end of the upper L-shaped clamping plate is connected with an upper L-shaped clamping plate bulge; one end of the lower L-shaped clamping plate is connected with a lower L-shaped clamping plate bulge; the upper L-shaped clamping plate and the lower L-shaped clamping plate are connected with the clamping plate hole through a height adjusting bolt; the plane of the upper L-shaped clamping plate is provided with a connecting hole of a height adjusting device.

Preferably, the number of the height adjusting bolts is 6, and the height adjusting bolts are symmetrically arranged on two sides of the upper L-shaped clamping plate respectively.

Preferably, the bolt of the upper L-shaped clamping plate is superposed with the outer surface of the upper half part of the sample, and the clamping plate is superposed with two side surfaces of the upper half part of the sample; the bolt of the lower L-shaped clamping plate is superposed with the outer surface of the lower half part of the sample, and the clamping plates on the two sides of the lower L-shaped clamping plate are superposed with the two sides of the lower half part of the sample; and the upper L-shaped clamping plate bulge and the lower L-shaped clamping plate bulge of the upper L-shaped clamping plate and the lower L-shaped clamping plate are respectively connected with the jaw of the tensile testing machine.

Preferably, the clamping plates on the upper L-shaped clamping plate and the lower L-shaped clamping plate are connected with the upper L-shaped clamping plate and the lower L-shaped clamping plate through holes, and the clamping plates are connected with the width adjusting screw.

The utility model has the advantages that: the utility model discloses a two L shape clamping plates will be sheared on the sample is fixed in tensile test machine, not only make friction stir spot welding experiment can go on polytypic tensile test machine, simple structure moreover, and easy to use has little and light, characteristics such as portable.

Drawings

FIG. 1 is an overall assembly view of the present invention;

fig. 2 is an assembly view of the upper L-shaped clamping plate of the present invention;

FIG. 3 is a schematic view of the structure of the width adjusting screw of the present invention;

fig. 4 is a schematic view of the structure of the clamping plate of the present invention;

fig. 5 is a schematic view of a tensile sample of the present invention;

in the figure: 1. the device comprises an upper L-shaped clamping plate protrusion, 2 an upper L-shaped clamping plate, 3 a height adjusting bolt, 4 a width adjusting clamping plate, 5 a lower L-shaped clamping plate, 6 a lower L-shaped clamping plate protrusion, 7 a width adjusting screw rod, 8 a height adjusting device connecting hole, 9 a sample, 10 a rectangular groove, 11 an upper L-shaped plate connecting hole, 12 a holding rod, 13 and a clamping plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail through the accompanying drawings and embodiments. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.

As shown in fig. 1 and 2, a special sample clamp for a friction stir spot welding spot shear tensile test comprises an upper L-shaped clamping plate 2 and a lower L-shaped clamping plate 5; the upper L-shaped clamping plate 2 and the width adjusting screw 7 are in threaded connection with an upper L-shaped plate connecting hole 11 through screws; one end of the width adjusting screw 7 is connected with a holding rod 12; the other end of the width adjusting screw 7 is connected with a clamping plate 13 in a matching way; the clamping plate 13 is connected with the upper L-shaped clamping plate 2 in a matched manner through the rectangular groove 10; the rectangular groove 10 is internally connected with a width adjusting splint 4; the side end of the upper L-shaped clamping plate 2 is connected with an upper L-shaped clamping plate bulge 1; one end of the lower L-shaped clamping plate 5 is connected with a lower L-shaped clamping plate bulge 6; the upper L-shaped clamping plate 2 and the lower L-shaped clamping plate 5 are connected with the clamping plate hole 8 through a height adjusting bolt 3; the plane of the upper L-shaped clamping plate 2 is provided with a height adjusting device connecting hole 8.

The number of the height adjusting bolts 3 is 6, the height adjusting bolts are symmetrically arranged on two sides of the upper L-shaped clamping plate 2 respectively, the number of each side is three, and the height adjusting bolts are uniformly distributed on the upper part, the middle part and the lower part of each side.

The bolt 3 of the upper L-shaped clamping plate 2 is superposed with the outer surface of the upper half part of the sample 9, and the clamping plate 13 is superposed with two side surfaces of the upper half part of the sample 9; the bolt 3 of the lower L-shaped clamping plate 5 is superposed with the outer surface of the lower half part of the sample 9, and the clamping plates 13 at two sides of the lower L-shaped clamping plate 5 are superposed with two sides of the lower half part of the sample 9; and the upper L-shaped clamping plate bulge 1 and the lower L-shaped clamping plate bulge 6 of the upper L-shaped clamping plate 2 and the lower L-shaped clamping plate 5 are respectively connected with the jaw of the tensile testing machine.

The clamping plates 13 on the upper L-shaped clamping plate 2 and the lower L-shaped clamping plate 5 are connected with the upper L-shaped clamping plate 2 and the lower L-shaped clamping plate 5 through holes, the clamping plates 13 are connected with the width adjusting screw 7, the sample 9 is aligned with the center line of the clamp when being placed into the clamp, and experimental errors caused by direction deviation are avoided.

The utility model relates to a novelty is applicable to the material of different models, and along with the development of manufacturing technique, you take the industry to also more and more high to the requirement of material down, and the aluminum alloy has just received extensive scientific researcher's love, and aluminum alloy density is little, intensity is high, the conductivity and heat conductivity is good, corrosion-resistant, workable. The utility model discloses mainly to the various models of aluminum alloy, for example various models such as 6061, 6062, be applied to various fields such as car, space flight, boats and ships.

The utility model relates to a rationally, adopt the linkage to adjust, simple structure can be used for thickness 0.5-4mm, various panels that the intensity rank is below 1000 MPa.

The upper half part of a sample 9 of friction stir spot welding is placed in a concave groove of an upper L-shaped clamping plate 2, the upper half part of the sample 9 is a cuboid, two end faces are removed, and four side surfaces can be added with a fixing device, the utility model adopts a clamping plate 13 to fix two side surfaces of the sample 9, a bottom surface is fixed by a height adjusting bolt 3, three surfaces fix the sample and ensure the position accuracy of the sample, thereby ensuring the accuracy of the experimental result, the clamping plate is connected with a width adjusting screw 7 through the bottom of the screw, the width adjusting screw 7 adjusts the position of the clamping plate 13 through clockwise and anticlockwise rotation, the width adjusting screw 7 rotates to drive the clamping plate 13 to horizontally move, the reference central line of the sample 9 is clamped, the height adjusting bolt 3 adjusts the height of the height adjusting bolt 3 through a connecting hole 8 of the height adjusting device, and the lower half part of the sample 9, whole sample 9 forms a whole with anchor clamps this moment, and this moment again with last grip block arch 1 and lower grip block arch 6 respectively with tensile test machine upper and lower jaw connection carry out the shearing experiment, when the experiment was gone on, along with load constantly increases, the solder joint produces deformation and then fracture, the first half rebound of this in-process anchor clamps, the latter half rebound of anchor clamps, when the solder joint disconnection, anchor clamps also part simultaneously, the position and the shape at software record load and fracture position, the experiment is ended.

Here, especially, the width adjustment splint 4 is explained, when the position of the width adjustment screw 7 adjustment splint 13, the width adjustment splint 4 is connected with the rectangular groove 10 through clearance fit, the width adjustment splint 4 and the rectangular groove 10 can realize relative sliding, 2 width adjustment splints 4 are arranged on each splint 13, when the splint 13 transversely moves, the transverse moving of the width adjustment splint 4 and the rectangular groove 10 also occurs simultaneously, at the moment, the two width adjustment splints 4 can keep the splint 13 not to incline towards one end, therefore, the level of the splint 13 is ensured, the accuracy in the process of clamping the sample 9 can be ensured only by the level of the splint 13, and the upper plane of the sample 9 can completely coincide with the upper plane of the splint 13. The accuracy of the experimental result is guaranteed.

The design and manufacture of the L-shaped clamping plate are convenient to clamp with a tensile testing machine, the stress of the sample 9 in each direction is uniform in the experimental process, the special center line design of the clamp can enable the welding spot to be subjected to vertical tensile force in the up-down direction, and the accuracy of the experimental result is guaranteed.

The assembly size matching on the upper L-shaped clamping plate 2, the lower L-shaped clamping plate 5 and the clamping plate 13 is designed according to the national standard, the aperture on the upper L-shaped clamping plate is phi 10, the aperture on the upper clamping plate 13 is phi 10, the diameter of the width adjusting screw 7 is phi 9.8, the diameter of the bottom of the screw is phi 12, the diameter of the side connecting hole of the clamping plate 13 is phi 10, and the diameter of the hole at the bottom of the internal connecting screw is phi 12.2.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims

1. A special sample clamp for a friction stir spot welding spot shear tensile test is characterized by comprising an upper L-shaped clamping plate (2) and a lower L-shaped clamping plate (5); the upper L-shaped clamping plate (2) is in threaded connection with the width adjusting screw (7) through the screw and the upper L-shaped plate connecting hole (11); one end of the width adjusting screw rod (7) is connected with a holding rod (12); the other end of the width adjusting screw rod (7) is connected with a clamping plate (13) in a matching way; the clamping plate (13) is connected with the upper L-shaped clamping plate (2) in a matched manner through a rectangular groove (10); the rectangular groove (10) is internally connected with a width adjusting splint (4); the side end of the upper L-shaped clamping plate (2) is connected with an upper L-shaped clamping plate bulge (1); one end of the lower L-shaped clamping plate (5) is connected with a lower L-shaped clamping plate bulge (6); the upper L-shaped clamping plate (2) and the lower L-shaped clamping plate (5) are connected with the clamping plate hole (8) through a height adjusting bolt (3); the plane of the upper L-shaped clamping plate (2) is provided with a rectangular groove (10).

2. The special sample clamp for the shear-tensile test of the friction stir spot welding spot according to claim 1, wherein the number of the height adjusting bolts (3) is 6, and the height adjusting bolts are symmetrically arranged on two sides of the upper L-shaped clamping plate (2) respectively, and the number of each side is three.

3. The special sample clamp for the shear-tensile test of the friction stir spot welding spot according to claim 1, characterized in that the bolt (3) of the upper L-shaped clamping plate (2) is coincided with the outer surface of the upper half part of the sample (9), and the clamping plate (13) is coincided with two side surfaces of the upper half part of the sample (9); the bolt (3) of the lower L-shaped clamping plate (5) is superposed with the outer surface of the lower half part of the test sample (9), and the clamping plates (13) at two sides of the lower L-shaped clamping plate (5) are superposed with the two sides of the lower half part of the test sample (9); and the upper L-shaped clamping plate bulges (1) and the lower L-shaped clamping plate bulges (6) of the upper L-shaped clamping plate (2) and the lower L-shaped clamping plate (5) are respectively connected with the jaw of the tensile testing machine.

4. The special sample clamp for the shear-tensile test of the friction stir spot welding spot according to claim 1, wherein the clamping plates (13) on the upper L-shaped clamping plate (2) and the lower L-shaped clamping plate (5) are connected with the upper L-shaped clamping plate (2) and the lower L-shaped clamping plate (5) through holes, and the clamping plates (13) are connected with the width adjusting screw (7).