Device for testing tensile strength of bent part of spline

Abstract

The utility model relates to the field of material tensile testing, in particular to a device for testing the tensile strength of a bent part of a spline, which comprises a spline clamping platform and a clamping base for connecting a universal material testing machine, and the clamping base is hinged with the spline clamping platform; the clamping base is provided with a limiting piece, the spline clamping platform is provided with a plurality of limiting parts, and any limiting part can be connected with the limiting piece in a limiting mode; the sample strip clamping platform can be connected with a bent sample strip in a clamping manner; by rotating the sample strip clamping platform, the bending sample strip can keep the current bending forming angle during tensile strength testing, the tensile strength of the bending position of a material can be accurately tested, the accuracy of a testing result is guaranteed, accurate data support is provided for the structural design of a product, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of material tensile testing, in particular to a device for testing the tensile strength of a bending portion of a spline. Background Art

[0002] In the tensile strength test of the bending position of the box of metal or other materials, the tensile strength of the test specimen is usually tested by stretching the flat material or fixing the limited pressure block at 90 degrees.

[0003] However, stretching a flat material or fixing a limited pressure block at 90 degrees can only perform tensile strength tests on the test specimen at 90 degrees or 180 degrees. Since the tensile direction of the material cannot be changed, when testing the test specimen with a bending angle between 90 and 180 degrees, the test specimen will be deformed at the bending point, and the tensile strength of the test specimen at the bending point cannot be accurately obtained, resulting in inaccurate tensile strength test results at bending positions such as box corners.

[0004] Therefore, there is an urgent need for a technical solution to solve the current technical problem of inaccurate tensile strength test results for test strips with bends. Utility Model Content

[0005] The purpose of the utility model is to provide a device for testing the tensile strength of a bending portion of a test strip, in order to solve the technical problem that the tensile strength test result of a test strip with bending is inaccurate.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A device for testing the tensile strength of a spline bending portion, comprising a spline clamping platform and a clamping base for connecting to a universal material testing machine, wherein the clamping base is hinged to the spline clamping platform;

[0008] The clamping base is provided with a limiting piece, and the spline clamping platform is provided with a plurality of limiting parts, and any of the limiting parts can be connected with the limiting piece in a limiting manner;

[0009] The spline clamping platform can clamp and connect the bent splines.

[0010] The utility model discloses a device for testing the tensile strength of a spline bending part. The spline clamping platform is hinged with the clamping base, so that the spline clamping platform can rotate around the hinge, thereby changing the inclination angle of the clamping surface of the spline clamping platform, and the bent spline can be clamped to maintain the existing bending angle for tensile testing; a limiter is arranged on the clamping base, and the limiter cooperates with the limiter to fix the clamping base at a predetermined angle, so as to avoid inaccurate tensile strength test results caused by the shaking of the spline clamping platform; when in use, the bent part of the bent spline is located at the edge of the clamping surface of the spline clamping platform, the upper tensile joint of the universal material testing machine is connected with the bent spline, and the lower tensile joint of the universal material testing machine is connected with the clamping base, and the spline clamping platform is adjusted by rotation, so that the bent spline is subjected to tensile testing under the premise of maintaining the current bending angle; the tensile strength of the material bending part can be accurately tested, so that the tensile strength of the test spline after bending or forming can also be accurately measured.

[0011] As a preferred solution of the utility model, the spline clamping platform is provided with a rotating shaft, the clamping base is provided with a hinged portion, and the rotating shaft is rotatably connected to the hinged portion. By arranging the rotating shaft to be rotatably connected to the hinged portion, the spline clamping platform can rotate around the rotating shaft, thereby adjusting the clamping angle of the spline clamping platform; the cylindrical rotating shaft runs through the opposite sides of the spline clamping platform, or the rotating shaft is two cylindrical rotating shafts arranged oppositely on both sides of the spline clamping platform.

[0012] As a preferred solution of the utility model, the clamping base is provided with a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are arranged opposite to each other, the spline clamping platform is located between the first clamping plate and the second clamping plate, and the first clamping plate and the second clamping plate are both rotatably connected to the rotating shaft. By arranging the spline clamping platform between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate jointly support the spline clamping platform, so that the spline clamping platform has better stability and can bear greater forces.

[0013] As a preferred solution of the utility model, the position-limiting member includes a position-limiting bayonet, the position-limiting part includes through holes penetrating opposite sides of the spline clamping platform, the first clamping plate is provided with a through first position-limiting hole, the second clamping plate is provided with a through second position-limiting hole, the first position-limiting hole, the through hole and the second position-limiting hole are aligned and connected in sequence, and the position-limiting bayonet is penetrated through the first position-limiting hole, the through hole and the second position-limiting hole. The position-limiting bayonet passes through the first position-limiting hole, the through hole and the second position-limiting hole in sequence, so that the position-limiting platform is limited, the stability of the spline clamping platform during use is ensured, and the accuracy of the test results is ensured.

[0014] As a preferred solution of the utility model, the first limiting hole and the second limiting hole both include waist-shaped holes, the through hole includes a first connecting hole and a second connecting hole, and the first connecting hole and the second connecting hole can both be connected to the waist-shaped hole; along the radial direction of the rotating shaft, the first connecting hole and the second connecting hole are arranged in an array. The double-row limiting bayonet can be inserted into the first connecting hole and the second connecting hole at the same time, thereby strengthening the limiting effect on the spline clamping platform and providing the spline clamping platform with higher firmness and tensile balance.

[0015] As a preferred solution of the utility model, the rotating shaft includes a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are arranged opposite to each other, the first rotating shaft is rotatably connected to the first clamping plate, and the second rotating shaft is rotatably connected to the second clamping plate. The first rotating shaft is connected to the first clamping plate, and the second rotating shaft is connected to the second clamping plate, so that the spline clamping platform can rotate smoothly; when in use, the bending part of the bent spline can be set on the axis of the rotating shaft, so as to facilitate the adjustment of the angle of the spline clamping platform.

[0016] As a preferred solution of the utility model, along the rotation direction of the rotation axis, a plurality of the limiting parts are arranged on the spline clamping platform. By arranging a plurality of limiting parts on the spline clamping platform, the spline clamping platform can be fixed at various angles, so that the spline clamping platform can adapt to bending splines with various bending angles.

[0017] As a preferred solution of the utility model, the spline clamping platform includes a rotating base and a sample pressing plate, the sample pressing plate is detachably connected to the rotating base, the spline clamping platform and the rotating base can clamp the bent spline; the rotating base is hinged to the clamping base, and the limiter is arranged on the rotating base. The rotating base and the sample pressing plate can clamp the bent spline, which is convenient for disassembly of the bent spline.

[0018] As a preferred solution of the utility model, the rotating base is provided with a clamping groove, and the sample pressing plate is adapted to be embedded in the clamping groove. The bent spline is placed in the clamping groove, and the sample pressing plate is fixed by bolts, so that the sample pressing plate and the inner wall of the clamping groove abut against the bent spline, thereby fixing the bent spline on the spline clamping platform.

[0019] As a preferred solution of the utility model, a clamping part is provided at one end of the clamping base away from the spline clamping platform. The clamping part is provided for connecting to a universal material testing machine.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] 1. The utility model discloses a device for testing the tensile strength of a spline bending part. The spline clamping platform is hinged to the clamping base, so that the spline clamping platform can rotate around the hinge, thereby changing the inclination angle of the clamping surface of the spline clamping platform, and the bent spline can be clamped to maintain the existing bending angle for tensile testing; a limiter is arranged on the clamping base, and the limiter cooperates with the limiter to fix the clamping base at a predetermined angle, so as to avoid inaccurate tensile strength test results caused by the shaking of the spline clamping platform; when in use, the bent part of the bent spline is located at the edge of the clamping surface of the spline clamping platform, the upper tensile joint of the universal material testing machine is connected to the bent spline, and the lower tensile joint of the universal material testing machine is connected to the clamping base, and the spline clamping platform is adjusted by rotation, so that the bent spline can be subjected to tensile testing under the premise of maintaining the current bending angle; the tensile strength of the material bending part can be accurately tested, and the tensile strength of the test spline after bending or forming can also be accurately measured.

[0022] 2. The utility model is a device for testing the tensile strength of a spline bending portion, which has a simple structure, is easy to manufacture, and is convenient to use. By rotating the spline clamping platform, the bent spline can maintain the current bending forming angle when performing a tensile strength test. The tensile strength of the material at the bending portion can be accurately tested, and the accuracy of the test results can be ensured. This provides accurate data support for the structural design of the product, improves the quality of the product, and has good economic and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the exploded structure of the device for testing the tensile strength of the spline bending portion in Example 1;

[0024] Figure 2 is a schematic structural diagram of a device for testing the tensile strength of a spline bending portion in Example 1;

[0025] Figure 3 is a side structural schematic diagram of a device for testing the tensile strength of a spline bending portion in Example 1;

[0026] Figure 4 is a schematic side view of the rotating base of Example 1;

[0027] Figure 5 is a schematic cross-sectional structural diagram of the device for testing the tensile strength of a spline bending portion of Example 1 in use;

[0028] Figure 6 It is a schematic cross-sectional structural diagram of the device for testing the tensile strength of a spline bending portion in Example 1 in use.

[0029] icon:

[0030] 1-rotating base, 2-clamping base, 3-limiting piece, 4-limiting part, 5-rotating axis, 6-hinge part, 7-first clamping plate, 8-second clamping plate, 9-first limiting hole, 10-second limiting hole, 11-sample pressing plate, 12-clamping groove, 13-clamping part, 14-bending spline, 41-first connecting hole, 42-second connecting hole. DETAILED DESCRIPTION

[0031] The utility model is described in detail below in conjunction with the accompanying drawings.

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] Example 1

[0034] like Figure 1-Figure 6 A device for testing the tensile strength of a spline bending portion is shown, comprising a spline clamping platform and a clamping base 2 for connecting to a universal material testing machine, wherein the clamping base 2 is hinged to the spline clamping platform;

[0035] The clamping base 2 is provided with a limiter 3, and the spline clamping platform is provided with a plurality of limiters 4, and any of the limiters 4 can be connected with the limiter 3 in a limit position;

[0036] The spline clamping platform can clamp and connect the bent spline 14 .

[0037] The spline clamping platform is hinged with the clamping base 2 so that the spline clamping platform can rotate around the hinge, thereby changing the inclination angle of the clamping surface of the spline clamping platform, and the bent spline 14 can maintain the existing bending angle for tensile testing after being clamped; a limiter 3 is provided on the clamping base 2, and the limiter 3 cooperates with the limiter 4 to fix the clamping base 2 at a predetermined angle, thereby avoiding inaccurate tensile strength test results caused by shaking of the spline clamping platform.

[0038] Specifically, the spline clamping platform is composed of a rotating base 1 and a sample pressing plate 11, and the sample pressing plate 11 is detachably connected to the rotating base 1 by bolts, and the bent spline 14 is clamped and fixed by the spline clamping platform and the rotating base 1 respectively abutting against the two sides of the bent spline 14; the rotating base 1 is hinged to the clamping base 2, and the limiting part 4 is arranged on the rotating base 1; by rotating the rotating base 1, the force angle of the bent spline 14 is changed, so that the bent spline 14 can be subjected to tensile testing while maintaining the current bending state, and more accurate test results can be obtained.

[0039] Specifically, the rotating base 1 is provided with a clamping groove 12, and the sample pressing plate 11 is adapted to be embedded in the clamping groove 12, and the bottom wall of the clamping groove 12 and the sample pressing plate 11 respectively abut against the two sides of the bent spline 14, so that the sample pressure strip is clamped.

[0040] Specifically, a clamping portion 13 is provided at one end of the clamping base 2 away from the spline clamping platform, so that the universal material testing machine can more easily apply a tensile force to the bent spline 14 .

[0041] Specifically, the clamping base 2 is provided with a first clamping plate 7 and a second clamping plate 8, and the first clamping plate 7 and the second clamping plate 8 are respectively located on two opposite sides of the clamping base 2, and the first clamping plate 7 and the second clamping plate 8 are relatively arranged, so that the rotating base 1 is arranged between the first clamping plate 7 and the second clamping plate 8, and hinge holes are relatively arranged on the first clamping plate 7 and the second clamping plate 8 as hinge parts 6, so that the rotating shaft 5 arranged on the rotating base 1 is rotatably connected with the hinge holes; the rotating base 1 can be rotated around the rotating shaft 5, and the rotating base 1 can be rotated to any angle, so that the bent spline can be subjected to tensile testing without changing the current bending shape, thereby ensuring the accuracy of the tensile test results.

[0042] Specifically, the rotating shaft 5 is composed of a first rotating shaft and a second rotating shaft, the first rotating shaft 5 and the second rotating shaft 5 are arranged opposite to each other, the first rotating shaft is rotationally connected to the first clamping plate 7, and the second rotating shaft is rotationally connected to the second clamping plate 8; by setting two rotating shafts to connect the first clamping plate 7 and the second clamping plate 8 respectively, the space from the first rotating shaft to the second rotating shaft is left vacant, so that the bending portion of the bending spline 14 can be placed on the axis line of the first rotating shaft and the second rotating shaft, so that the rotation angle of the bending spline 14 can be more easily controlled.

[0043] Specifically, the limiting member 3 is a limiting bayonet, the limiting portion 4 is a through hole, the first clamping plate 7 is provided with a through first limiting hole 9, the second clamping plate 8 is provided with a through second limiting hole 10, the first limiting hole 9, the through hole and the second limiting hole 10 are aligned and connected in sequence, and the limiting bayonet is penetrated through the first limiting hole 9, the through hole and the second limiting hole 10. The limiting bayonet sequentially passes through the first limiting hole 9, the through hole and the second limiting hole to limit the spline clamping platform, thereby ensuring the stability of the spline clamping platform during use and the accuracy of the test results.

[0044] Specifically, along the rotation direction of the rotation axis 5, a plurality of through holes are arranged on the rotating base 1, so that the rotating base 1 can be limited at various angles, and the rotating base 1 can be used for tensile testing of bending splines 14 with different bending degrees.

[0045] Specifically, the first limiting hole 9 and the second limiting hole 10 both include waist-shaped holes, and the through hole includes a first connecting hole 41 and a second connecting hole 42, and the first connecting hole 41 and the second connecting hole 42 can both be connected to the waist-shaped hole; along the radial direction of the rotating shaft 5, the first connecting hole 41 and the second connecting hole 42 are staggered. With the rotating shaft as the center, the adjacent first connecting holes 41 and the second connecting holes 42 differ by 10 degrees.

[0046] The present embodiment provides a device for testing the tensile strength of a spline bending portion. When in use, the bending portion of the bent spline 14 is located at the edge of the clamping surface of the spline clamping platform, the upper tensile joint of the universal material testing machine is connected to the bent spline 14, and the lower tensile joint of the universal material testing machine is connected to the clamping base 2. By rotating and adjusting the spline clamping platform, the bent spline 14 can be subjected to a tensile test while maintaining the current bending angle; the tensile strength of the material at the bending portion can be accurately tested, and the tensile strength of the test spline after bending or forming can also be accurately measured.

[0047] Example 2

[0048] The present embodiment is a device for testing the tensile strength of a spline bending portion, and its structure is substantially the same as that of the first embodiment. The difference from the first embodiment is that a row of through holes is provided on the rotating base 1 along the radial direction of the rotating shaft 5 .

[0049] Specifically, the first limiting hole 9 and the second limiting hole 10 are both circular holes.

[0050] Pass the pin through the first limiting hole 9, the through hole and the second limiting hole 10 in sequence to limit the rotation base 1;

[0051] Example 3

[0052] The present embodiment is a device for testing the tensile strength of a spline bending portion, and its structure is substantially the same as that of the embodiment 1. The difference from the embodiment 1 is that the limiting portion 4 is a limiting protrusion or a limiting groove.

[0053] Specifically, the limiting protrusion can abut against the limiting latch, or the limiting latch can be adapted to be inserted into the limiting groove.

[0054] The limiting pin and the limiting protrusion or the limiting groove cooperate to achieve the limiting of the rotating base 1.

[0055] Example 4

[0056] The present embodiment is a device for testing the tensile strength of a spline bending portion, and its structure is substantially the same as that of the first embodiment. The difference from the first embodiment is that the first connecting hole 41 and the second connecting hole 42 are arranged in an array along the radial direction of the rotating shaft 5 .

[0057] Specifically, with the rotation axis as the center, the adjacent first connection holes 41 are spaced 10 degrees apart, and the adjacent second connection holes 42 are spaced 10 degrees apart.

[0058] By inserting the limiting pins through the first connecting hole 41 and the second connecting hole 42 at the same time, the limiting effect on the spline clamping platform is enhanced, providing the spline clamping platform with higher firmness and tensile balance.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for testing the tensile strength of a spline bending portion, characterized in that: It comprises a spline clamping platform and a clamping base (2) for connecting to a universal material testing machine, wherein the clamping base (2) is hingedly connected to the spline clamping platform; The clamping base (2) is provided with a limiting member (3), and the spline clamping platform is provided with a plurality of limiting portions (4), and any of the limiting portions (4) can be connected to the limiting member (3) in a limiting manner; The spline clamping platform is capable of clamping and connecting the bent spline (14).

2. A device for testing the tensile strength of a spline bending portion as claimed in claim 1, characterized in that: The spline clamping platform is provided with a rotating shaft (5), the clamping base (2) is provided with a hinged portion (6), and the rotating shaft (5) is rotatably connected to the hinged portion (6).

3. A device for testing the tensile strength of a spline bending portion as claimed in claim 2, characterized in that: The clamping base (2) is provided with a first clamping plate (7) and a second clamping plate (8), the first clamping plate (7) and the second clamping plate (8) are arranged opposite to each other, the spline clamping platform is located between the first clamping plate (7) and the second clamping plate (8), and the first clamping plate (7) and the second clamping plate (8) are both rotatably connected to the rotating shaft (5).

4. A device for testing the tensile strength of a spline bending portion as claimed in claim 3, characterized in that: The limiting member (3) comprises a limiting bayonet, the limiting portion (4) comprises through holes penetrating opposite sides of the spline clamping platform, the first clamping plate (7) has a through first limiting hole (9), the second clamping plate (8) has a through second limiting hole (10), the first limiting hole (9), the through hole and the second limiting hole (10) are aligned and connected in sequence, and the limiting bayonet is passed through the first limiting hole (9), the through hole and the second limiting hole (10).

5. A device for testing the tensile strength of a spline bending portion as claimed in claim 4, characterized in that: The first limiting hole (9) and the second limiting hole (10) both comprise waist-shaped holes, the through hole comprises a first connecting hole (41) and a second connecting hole (42), and the first connecting hole (41) and the second connecting hole (42) are both capable of being connected to the waist-shaped hole; along the radial direction of the rotating shaft (5), the first connecting hole (41) and the second connecting hole (42) are arranged in an arranged manner.

6. A device for testing the tensile strength of a spline bending portion as claimed in claim 3, characterized in that: The rotating shaft (5) comprises a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are arranged opposite to each other, the first rotating shaft is rotationally connected to the first clamping plate (7), and the second rotating shaft is rotationally connected to the second clamping plate (8).

7. A device for testing the tensile strength of a spline bending portion as claimed in claim 2, characterized in that: Along the rotation direction of the rotation axis (5), a plurality of the limiting portions (4) are arranged in an array on the spline clamping platform.

8. A device for testing the tensile strength of a spline bending portion as claimed in any one of claims 1 to 7, characterized in that: The spline clamping platform comprises a rotating base (1) and a sample pressing plate (11), wherein the sample pressing plate (11) is detachably connected to the rotating base (1), and the spline clamping platform and the rotating base (1) are capable of clamping a bent spline (14); the rotating base (1) is hinged to the clamping base (2), and the limiting portion (4) is arranged on the rotating base (1).

9. A device for testing the tensile strength of a spline bending portion as claimed in claim 8, characterized in that: The rotating base (1) is provided with a clamping groove (12), and the sample pressing plate (11) is adapted to be embedded in the clamping groove (12).

10. A device for testing the tensile strength of a spline bending portion as claimed in claim 2, characterized in that: A clamping portion (13) is provided at one end of the clamping base (2) away from the spline clamping platform.

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