Metal t-joint shear test fixture device

Abstract

The utility model relates to the technical field of aircraft connecting structure test, provide a kind of metal T joint shearing test fixture device, including upper clamp, lower clamp and adjusting gasket;Upper clamp is used to hold the web of metal T joint test piece, and upper clamp includes first traction part and holding part, and holding part middle is provided with the holding slit for holding web;First traction part is set in the end of holding part;Lower clamp is used to fix the flange of test piece, and lower clamp includes second traction part and fixed part, and fixed part is used to and flange fixed connection, and second traction part is set in the end of fixed part;Adjusting gasket is 2, respectively set in the two sides of web, for adjusting the adaptability of web and holding slit;When shearing test, the axis of first traction part and second traction part is on the same straight line, and pass through the central surface of the web.The utility model can realize the holding adjustment of T joint of multiple web thickness, improve holding stability.

Description

Technical Field

[0001] This utility model relates to the field of aircraft connection structure testing technology, and in particular to a metal T-joint shear test fixture device. Background Technology

[0002] In the field of aircraft design, a large number of metal joints are involved, including T-joints. However, there are still many problems with the shear performance testing fixtures for T-joints, especially those based on new metal materials.

[0003] For example, in patent CN 207610918, the shear test fixture for the T-joint can only be used for testing T-joints of a single size configuration.

[0004] For example, in patent CN211856120U, the T-joint shear test fixture has an adjustable web thickness configuration, but it is prone to clamping instability.

[0005] Specialized fixtures for shear tests on T-joints of metallic materials are relatively rare.

[0006] The purpose of this invention is to provide a new configuration design for a metal material T-joint shear test fixture. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a metal T-joint shear test fixture that can be adjusted for different web thicknesses while improving the clamping stability.

[0008] The present invention adopts the following technical solution: A metal T-joint shear test fixture device includes an upper clamp, a lower clamp, and an adjusting shim; The upper clamp is used to hold the web of the metal T-joint test piece. The upper clamp includes a first traction part and a holding part. The holding part has a holding slot in the middle for holding the web. The first traction part is located at the end of the holding part. The lower clamp is used to fix the flange of the metal T-joint test piece. The lower clamp includes a second traction part and a fixing part. The fixing part is used to fix the flange to the flange. The second traction part is disposed at the end of the fixing part. There are two adjusting shims, which are respectively disposed on both sides of the web plate and are used to adjust the fit between the web plate and the reinforcing seam. During the shear test, the axes of the first traction part and the second traction part are on the same straight line and pass through the center plane of the web.

[0009] In addition to any of the possible implementations described above, another implementation is provided in which the fixing part of the lower clamp includes a horizontal unit and a vertical unit, the horizontal unit is used for fixed connection with the flange, the vertical unit is fixedly connected to the horizontal unit as a whole, and the second traction part is fixedly connected to the vertical unit.

[0010] In addition to any of the possible implementations described above, another implementation is provided in which the supporting part, the adjusting shim, and the web are each provided with a number of corresponding rows of first nail holes, and the web and the supporting part are fixedly connected by bolts passing through the first nail holes.

[0011] In addition to any of the possible implementations described above, another implementation is provided in which the first nail hole is arranged in two rows.

[0012] In addition to any of the possible implementations described above, another implementation is provided in which the horizontal unit and the flange are provided with two corresponding rows of second nail holes, and the flange and the horizontal unit are fixedly connected by bolts passing through the second nail holes.

[0013] In addition to any of the possible implementations described above, a further implementation is provided in which the distance between two adjacent first nail holes is greater than the thickness of the web.

[0014] In addition to any of the possible implementations described above, another implementation is provided in which both the first traction part and the second traction part are in the shape of round bars.

[0015] In addition to any of the possible implementations described above, another implementation is provided in which the first traction unit is an adjustable structure.

[0016] In addition to any of the possible implementations described above, another implementation is provided in which the second traction unit is an adjustable structure.

[0017] In addition to any of the possible implementations described above, another implementation is provided in which the upper clamp and the lower clamp are made of Q355 carbon steel, and the adjusting shim is made of aluminum foil.

[0018] The beneficial effects of this utility model are as follows: 1. A novel metal T-joint shear test fixture configuration is proposed. The structure is simple but can achieve clamping and adjustment of joints with various web thicknesses.

[0019] 2. Compared with existing fixture configurations, the configuration of this utility model can better improve the stability of the specimen during clamping. Attached Figure Description

[0020] Figure 1The diagram shown is a schematic of the upper clamp structure in the embodiment.

[0021] Figure 2 The diagram shown is a schematic diagram of the lower clamp structure in the embodiment.

[0022] Figure 3 The diagram shown is a schematic of the double-sided adjustment pad structure in the embodiment.

[0023] Figure 4 The figure shown is an overall schematic diagram of the clamping device in the embodiment.

[0024] Figure 5 The diagram shown is a schematic of the test specimen structure.

[0025] In the figure: 1-Upper clamp; 2-Lower clamp; 3-Adjusting shim; 4-Test piece; 5-First nail hole; 6-Second nail hole; 11-Holding part; 12-First traction part; 21-Fixing part; 22-Second traction part; 111-Holding seam; 211-Horizontal unit; 212-Vertical unit; 41-Web plate; 42-Flange. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered in isolation, but can be combined with each other to achieve better technical effects.

[0027] like Figures 1-4 As shown, an embodiment of the present invention provides a metal T-joint shear test fixture device, including an upper fixture 1, a lower fixture 2, and an adjusting shim 3; The upper clamp 1 is used to hold the web 41 of the metal T-joint test piece 4. The upper clamp 1 includes a first traction part 12 and a holding part 11. The holding part 11 has a holding slot 111 in the middle for holding the web 41. The first traction part 12 is located at the end of the holding part 11. Figure 1 As shown; The lower clamp 2 is used to fix the flange 42 of the metal T-joint test piece 4. The lower clamp 2 includes a second traction part 22 and a fixing part 21. The fixing part 21 is used to fix the flange 42, and the second traction part 22 is disposed at the end of the fixing part 41. Figure 2 As shown; Two adjusting shims 3 are respectively disposed on both sides of the web 41, used to adjust the fit between the web 41 and the reinforcing seam 111; for example Figure 3 As shown; During the shear test, the axes of the first traction part 12 and the second traction part 22 are on the same straight line and pass through the center plane of the web 41, such as... Figure 4As shown.

[0028] In one specific embodiment, the test piece 4 includes a web 41 and a flange 42, such as Figure 5 As shown.

[0029] In one specific embodiment, such as Figure 2 As shown, the fixing part 21 of the lower clamp 2 includes a horizontal unit 211 and a vertical unit 212. The horizontal unit 211 is used for fixed connection with the flange 42. The vertical unit 212 is fixedly connected to the horizontal unit 211 as a whole. The second traction part 22 is fixedly connected to the vertical unit 212.

[0030] In one specific embodiment, such as Figure 1 , Figure 3 As shown, the supporting part 11, the adjusting shim 3 and the web plate 41 are all provided with several rows of first nail holes 5. The web plate 41 and the supporting part 11 are fixedly connected by bolts passing through the first nail holes 5.

[0031] In one specific embodiment, such as Figure 1 As shown, the first nail hole 5 is arranged in 2 rows.

[0032] In one specific embodiment, such as Figure 2 As shown, both the horizontal unit 211 and the flange 42 are provided with two rows of corresponding second nail holes 6. The flange 42 and the horizontal unit 211 are fixedly connected by bolts passing through the second nail holes 6.

[0033] In one specific embodiment, the distance between two adjacent first nail holes 5 is greater than the thickness of the web plate 41.

[0034] In one specific embodiment, such as Figure 4 As shown, both the first traction part 12 and the second traction part 22 are cylindrical.

[0035] In one specific embodiment, the first traction part 12 is vertically adjustable, or the second traction part 22 is vertically adjustable, or both the first traction part 12 and the second traction part 22 are vertically adjustable. This facilitates adjusting the forces on the first traction part 12 and the second traction part 22 to be on the same straight line for different models of T-joint test pieces 4 during testing.

[0036] In one specific embodiment, the upper clamp 1 and the lower clamp 2 are made of Q355 carbon steel, and the adjusting shim 3 is made of aluminum foil.

[0037] During the test, the web 41 of the test piece 4 is fixed to the holding part 11 of the upper clamp 1. Specifically, bolts are used to pass through the holding part 11, the adjusting shim 3, and the first nail hole 5 of the web 41 for fixation. The adjusting shim 3 is selected and adapted according to the thickness difference between the web 41 and the holding seam 111. The flange 42 of the test piece 4 is fixed to the horizontal unit 211 of the lower clamp 2. Specifically, bolts are used to pass through the horizontal unit 211 and the second nail hole 6 of the flange 42 for fixation. The axes of the first traction part 12 and / or the second traction part 22 are then adjusted up and down to make them on the same straight line. Then, a load is applied for the test and the test results are recorded.

[0038] The clamping device of this utility model can adjust the clamped test piece 4 by adjusting the shims 3. The detachable shims 3 on both sides can be used to adjust for different web plate thicknesses. At the same time, the design of the upper clamp 1 and the lower clamp 2 improves the stability of the clamp.

[0039] While several embodiments of the present invention have been provided herein, those skilled in the art should understand that modifications can be made to the embodiments without departing from the spirit of the present invention. The above embodiments are merely exemplary and should not be construed as limiting the scope of the present invention.

Claims

1. A metal T-joint shear test fixture device, characterized in that, Includes upper clamp, lower clamp, and adjusting shims; The upper clamp is used to hold the web of the metal T-joint test piece. The upper clamp includes a first traction part and a holding part. The holding part has a holding slot in the middle for holding the web. The first traction part is located at the end of the holding part. The lower clamp is used to fix the flange of the metal T-joint test piece. The lower clamp includes a second traction part and a fixing part. The fixing part is used to fix the flange to the flange. The second traction part is disposed at the end of the fixing part. There are two adjusting shims, which are respectively disposed on both sides of the web plate and are used to adjust the fit between the web plate and the reinforcing seam; The axes of the first traction part and the second traction part are on the same straight line and pass through the center plane of the web.

2. The metal T-joint shear test fixture device as described in claim 1, characterized in that, The fixing part of the lower clamp includes a horizontal unit and a vertical unit. The horizontal unit is used for fixed connection with the flange strip. The vertical unit is fixedly connected to the horizontal unit as a whole. The second traction part is fixedly connected to the vertical unit.

3. The metal T-joint shear test fixture device as described in claim 1, characterized in that, The supporting part, adjusting shim and web are all provided with several rows of first nail holes, and the web and the supporting part are fixedly connected by bolts passing through the first nail holes.

4. The metal T-joint shear test fixture device as described in claim 3, characterized in that, The first nail hole is arranged in two rows.

5. The metal T-joint shear test fixture device as described in claim 2, characterized in that, Both the horizontal unit and the flange are provided with two corresponding rows of second nail holes, and the flange and the horizontal unit are fixedly connected by bolts passing through the second nail holes.

6. The metal T-joint shear test fixture device as described in claim 3 or 4, characterized in that, The distance between two adjacent first nail holes is greater than the thickness of the web.

7. The metal T-joint shear test fixture device as described in claim 1, characterized in that, Both the first traction part and the second traction part are cylindrical.

8. The metal T-joint shear test fixture device as described in claim 1, characterized in that, The first traction unit has an adjustable structure.

9. The metal T-joint shear test fixture device as described in claim 1, characterized in that, The second traction unit has an adjustable structure.

10. The metal T-joint shear test fixture device as described in claim 1, characterized in that, The upper clamp and the lower clamp are made of Q355 carbon steel, and the adjusting shim is made of aluminum foil.

Images