A bending test fixture for a carbon fiber wrapped cantilever beam

Abstract

The present invention provides a bending test tool for a carbon fiber wound cantilever beam, which mainly relates to the field of cantilever beam performance testing. The bending test tool for a carbon fiber wound cantilever beam comprises a left bottom beam and a right bottom beam, wherein a front beam, a middle beam and a rear beam are fixedly connected between the left bottom beam and the right bottom beam, respectively, a longitudinal support pillar 1 is fixedly installed on the middle part of the left bottom beam, and a longitudinal support pillar 2 is fixedly installed on the middle part of the right bottom beam, support pillars are fixedly installed on the front beam and the rear beam, respectively, a working platform is fixedly installed on the support pillars, a fixed seat is fixedly installed on the longitudinal support pillar 1, and a lifting seat is installed on one side of the longitudinal support pillar 2. The beneficial effects of the present invention are as follows: the present invention can effectively reduce the shear stress on the surface of the cantilever beam sample caused by the clamping of the fixture, prevent the shear stress from being too large and affecting the bearing capacity of the cantilever beam, and the independently designed support structure can provide stable support to prevent the internal stress from being too large and causing deformation to affect the test results, and is easy to use.

Description

Technical Field

[0001] The invention mainly relates to the field of cantilever beam performance testing, in particular to a bending testing tool for a carbon fiber wound cantilever beam. Background Art

[0002] A carbon fiber cantilever beam refers to a cantilever beam with a composite carbon fiber structure on the surface of the cantilever beam, which can improve the strength and other physical properties of the cantilever beam. In the bending test of the carbon fiber wrapped cantilever beam, there are two major influencing factors that will have a significant impact on the test results and cause errors in the test results. First, the test fixture support structure may undergo a small deformation when subjected to a large force, which will affect the test results; second, when the fixture clamps one end of the cantilever beam, a large shear stress will be generated between the edge of the fixture and the cantilever beam, and the shear stress will increase exponentially with the increase of the test pressure. When the shear stress on the cantilever beam surface is too large, it will have a greater impact on the bending pressure that the cantilever beam itself can withstand, thereby further affecting the test results. Summary of the invention

[0003] In order to address the deficiencies in the prior art, the present invention provides a bending test fixture for a carbon fiber wrapped cantilever beam, which can effectively reduce the shear stress on the surface of the cantilever beam specimen caused by clamping, and prevent excessive shear stress from affecting the bearing capacity of the cantilever beam. The independently designed support structure can provide stable support to prevent excessive internal stress from causing deformation that affects the test results, and is easy to use.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A bending test fixture for a carbon fiber wound cantilever beam comprises a left bottom beam and a right bottom beam, wherein a front beam, a middle beam and a rear beam are fixedly connected between the left bottom beam and the right bottom beam respectively, a longitudinal pillar one is fixedly installed on the middle part of the left bottom beam, and a longitudinal pillar two is fixedly installed on the middle part of the right bottom beam, support columns are fixedly installed on the front beam and the rear beam respectively, a working platform is fixedly installed on the support columns, a fixed seat is fixedly installed on the longitudinal pillar one, a lifting seat is installed on one side of the longitudinal pillar two, an oblique reinforcement column is fixedly installed between the top of one side of the longitudinal pillar one and one end of the right part of the middle beam, a bending test device is installed on the working platform, a fixing fixture is installed on the fixing seat, a movable fixture is placed on the lifting seat, an arc-shaped edge one is provided on one side of the fixing fixture, and an arc-shaped edge two is provided in the movable fixture.

[0006] The fixed fixture includes an upper fixed fixture and a lower fixed fixture, the lower fixed fixture is fixedly installed on a fixed seat, cantilever beam specimens are installed in the upper fixed fixture and the lower fixed fixture, and the upper fixed fixture is fixedly installed on the lower fixed fixture after the cantilever beam specimen is installed. The movable fixture includes an upper movable fixture and a lower movable fixture, and the lower movable fixture is placed on a lifting seat, and the upper movable fixture is fixedly installed on the lower movable fixture after the cantilever beam specimen is installed. A clamping end is provided on the upper movable fixture, and the arc-shaped edge 2 is arranged on one side of the upper movable fixture.

[0007] Triangular seats are fixedly installed at both ends of the left bottom beam and the right bottom beam, adjustable feet are installed in the triangular seats, and universal wheels are fixedly installed at both ends of the bottom of the left bottom beam and the right bottom beam.

[0008] A mounting hole is provided in the middle of the working platform, and a notch adapted to the lifting seat is provided at one end of the working platform.

[0009] The lifting seat includes a column, a sleeve is slidably installed on the outside of the column, one side of the sleeve is fixedly connected to the receiving seat, a rack is set on one side of the sleeve, an adjusting gear is rotatably installed on one side of the sleeve, the adjusting gear meshes with the rack, the adjusting gear shaft is fixedly connected to the crank, and a fixed knob is set on the side of the sleeve away from the adjusting gear.

[0010] The fixed clamp is divided into an annular fixed clamp and a square fixed clamp according to the different cross-sectional shapes of the clamped cantilever beam, and the movable clamp is divided into an annular movable clamp and a square movable clamp according to the different cross-sectional shapes of the clamped cantilever beam.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The present invention can use clamps of various structures to stably clamp cantilever beam specimens with different cross-sectional shapes. The arc surface 1 set on the fixed clamp and the arc surface 2 set on the movable clamp can effectively reduce the shear stress on the surface of the cantilever beam specimen caused by the clamping of the clamp, prevent the shear stress from being too large and affecting the bearing capacity of the cantilever beam, and improve the accuracy of the test results. The independently designed support structure can provide stable support to prevent deformation caused by excessive internal stress and affect the test results, thereby ensuring the validity of the test results. The device can be easily moved and stably placed, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle;

[0014] Attached Figure 2 is a schematic diagram of the structure of the present invention from a second viewing angle;

[0015] Attached Figure 3It is a schematic diagram of the structure of the bending test device of the present invention after being hidden;

[0016] Attached Figure 4 It is a partial enlarged structural schematic diagram of part A of the present invention;

[0017] Attached Figure 5 It is a partial enlarged structural schematic diagram of part B of the present invention;

[0018] Attached Figure 6 It is a schematic diagram of the structure of different types of clamps of the present invention.

[0019] Numbers shown in the accompanying drawings: 1, left bottom beam; 2, right bottom beam; 3, front beam; 4, middle beam; 5, rear beam; 6, longitudinal support one; 7, longitudinal support two; 8, support column; 9, working platform; 10, fixed seat; 11, lifting seat; 12, oblique reinforcement column; 13, bending test equipment; 14, fixed fixture; 15, movable fixture; 16, arc side one; 17, arc side two; 21, triangular seat; 22, adjustable support foot; 23, universal wheel; 61, reinforcement rod one; 62, reinforcement rod two; 63, reinforcement rod three; 64, reinforcement rod four; 81, support column one; 8 2. Support column two; 83. Support column three; 84. Support column four; 91. Mounting hole; 92. Notch; 111. Column; 112. Sleeve; 113. Socket; 114. Rack; 115. Adjusting gear; 116. Crank; 117. Fixing knob; 141. Upper fixing fixture; 142. Lower fixing fixture; 143. Cantilever beam specimen; 144. Annular fixing fixture; 145. Square fixing fixture; 151. Upper movable fixture; 152. Lower movable fixture; 153. Clamping end; 154. Annular movable fixture; 155. Square movable fixture. DETAILED DESCRIPTION

[0020] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0021] Combined with Figure 1-6A bending test fixture for a carbon fiber wound cantilever beam comprises a left bottom beam 1 and a right bottom beam 2, wherein a front beam 3, a middle beam 4 and a rear beam 5 are fixedly connected between the left bottom beam 1 and the right bottom beam 2, respectively, a longitudinal support 6 is fixedly installed on the middle part of the left bottom beam 1, and a longitudinal support 2 7 is fixedly installed in the middle part of the right bottom beam 2, support columns 8 are fixedly installed on the front beam 3 and the rear beam 5, respectively, a working platform 9 is fixedly installed on the support column 8, a fixed seat 10 is fixedly installed on the longitudinal support 1 6, a lifting seat 11 is installed on one side of the longitudinal support 2 7, an oblique reinforcement column 12 is fixedly installed between the top of one side of the longitudinal support 1 6 and one end of the right part of the middle beam 4, a bending test device 13 is installed on the working platform 9, a fixed fixture 14 is installed on the fixed seat 10, a movable fixture 15 is placed on the lifting seat 11, an arc-shaped edge 16 is provided on one side of the fixed fixture 14, and an arc-shaped edge 2 17 is provided in the movable fixture 15.

[0022] The fixed fixture 14 includes an upper fixed fixture 141 and a lower fixed fixture 142, and the lower fixed fixture 142 is fixedly installed on the fixed seat 10. A cantilever beam sample 143 is installed in the upper fixed fixture 141 and the lower fixed fixture 142. After the cantilever beam sample 143 is installed, the upper fixed fixture 141 is fixedly installed on the lower fixed fixture 142. The movable fixture 15 includes an upper movable fixture 151 and a lower movable fixture 152. The lower movable fixture 152 is placed on the lifting seat 11. After the cantilever beam sample 143 is installed, the upper movable fixture 151 is fixedly installed on the lower movable fixture 152. The upper movable fixture 151 is provided with a clamping end 153, and the arc-shaped edge 17 is arranged on one side of the upper movable fixture 151.

[0023] Triangular seats 21 are fixedly installed at both ends of the left bottom beam 1 and the right bottom beam 2, and adjustable feet 22 are installed in the triangular seats 21. Universal wheels 23 are fixedly installed at both ends of the bottom of the left bottom beam 1 and the right bottom beam 2, respectively. The universal wheels facilitate moving the device. The triangular seats are used to install the adjustable feet, and the adjustable feet can adjust the height from the ground to achieve moving or stably placing the device.

[0024] A mounting hole 91 is provided in the middle of the working platform 9, and a notch 92 adapted to the lifting seat 11 is provided at one end of the working platform 9. The mounting hole is used for the oblique reinforcing column to pass through, and the notch is used to adapt to the partial structure of the lifting seat.

[0025] The lifting seat 11 includes a column 111, a sleeve 112 is slidably installed on the outside of the column 111, one side of the sleeve 112 is fixedly connected to a receiving seat 113, a rack 114 is provided on one side of the sleeve 112, an adjusting gear 115 is rotatably installed on one side of the sleeve 112, the adjusting gear 115 meshes with the rack 114, the rotating shaft of the adjusting gear 115 is fixedly connected to a crank 116, and a fixed knob 117 is provided on the side of the sleeve 112 away from the adjusting gear 115. The gear rack drive method is adopted in the lifting cylinder because the lifting seat does not need to bear excessive pressure, and this method can be used to lift and lower more quickly. The receiving seat is used to place and support the movable clamp, which is convenient for installing the movable clamp, and the height of the receiving seat can be quickly locked using a fixed knob.

[0026] The fixed clamp 14 is divided into an annular fixed clamp 144 and a square fixed clamp 145 according to the different cross-sectional shapes of the clamped cantilever beam. The movable clamp 15 is divided into an annular movable clamp 154 ​​and a square movable clamp 155 according to the different cross-sectional shapes of the clamped cantilever beam. Different types of clamps are used to install cantilever beam specimens with different cross-sectional shapes.

[0027] A reinforcing rod 1 61 and a reinforcing rod 2 62 are arranged between the two sides of the longitudinal pillar 1 and the left bottom beam 1, and a reinforcing rod 3 63 and a reinforcing rod 4 64 are arranged between the two sides of the longitudinal pillar 2 7 and the right bottom beam 2. The reinforcing columns can effectively ensure the stability of the longitudinal pillars.

[0028] The support columns 8 include support column 1 81 , support column 2 82 , support column 3 83 , and support column 4 84 . Several support columns can effectively ensure the stability of the working platform.

[0029] The left bottom beam 1, the right bottom beam 2, the front beam 3, the middle beam 4, and the rear beam 5 can provide stable support for the upper structure. The longitudinal support column 1 is used to support the fixed seat and the fixing fixture. The longitudinal support column 2 supports the lifting seat. The support column is used to support the working platform. The lifting seat can be manually adjusted in height and locked according to usage needs. The oblique reinforcement column can prevent the longitudinal support column 1 from elastically deforming toward the inside of the equipment during the bending test and thus affecting the test results. The fixing fixture is used to fix the fixed end of the cantilever beam specimen in the test. The movable fixture is used to clamp the end of the cantilever beam specimen that is under pressure. The bending test equipment adopts existing equipment, which can accurately apply pressure and record information such as the fixture displacement distance. The arc edge 1 and the arc edge 2 can effectively reduce the shear stress generated on the surface of the cantilever beam due to the clamping of the fixture during the bending test, thereby further improving the validity of the test results.

Claims

1. A bending test fixture for a carbon fiber-wound cantilever beam, comprising a left bottom beam (1) and a right bottom beam (2), characterized in that: A front beam (3), a middle beam (4), and a rear beam (5) are fixedly connected between the left bottom beam (1) and the right bottom beam (2), respectively; a longitudinal support column (6) is fixedly installed on the middle part of the left bottom beam (1), and a longitudinal support column (7) is fixedly installed on the middle part of the right bottom beam (2); support columns (8) are fixedly installed on the front beam (3) and the rear beam (5), respectively; a working platform (9) is fixedly installed on the support columns (8); a fixing seat (10) is fixedly installed on the longitudinal support column (6); a lifting seat (11) is installed on one side of the longitudinal support column (7); an oblique reinforcement column (12) is fixedly installed between the top of one side of the longitudinal support column (6) and one end of the right part of the middle beam (4); a bending test device (13) is installed on the working platform (9); and a fixing fixture (11) is installed on the fixing seat (10). 14), a movable clamp (15) is placed on the lifting seat (11), one side of the fixed clamp (14) is provided with an arc-shaped edge 1 (16), and the movable clamp (15) is provided with an arc-shaped edge 2 (17), the lifting seat (11) comprises a column (111), a sleeve (112) is slidably installed outside the column (111), one side of the sleeve (112) is fixedly connected to a receiving seat (113), one side of the sleeve (112) is provided with a rack (114), one side of the sleeve (112) is rotatably installed with an adjusting gear (115), the adjusting gear (115) meshes with the rack (114), the rotating shaft of the adjusting gear (115) is fixedly connected to a crank (116), and a fixed knob (117) is provided on the side of the sleeve (112) away from the adjusting gear (115).

2. The bending test fixture for a carbon fiber wound cantilever beam according to claim 1, characterized in that: The fixed fixture (14) comprises an upper fixed fixture (141) and a lower fixed fixture (142), wherein the lower fixed fixture (142) is fixedly mounted on the fixed seat (10), and cantilever beam specimens (143) are mounted in the upper fixed fixture (141) and the lower fixed fixture (142). After the cantilever beam specimen (143) is mounted, the upper fixed fixture (141) is fixedly mounted on the lower fixed fixture (142). The movable fixture (15) comprises an upper movable fixture (151) and a lower movable fixture (152), wherein the lower movable fixture (152) is placed on the lifting seat (11), and after the cantilever beam specimen (143) is mounted, the upper movable fixture (151) is fixedly mounted on the lower movable fixture (152), and the upper movable fixture (151) is provided with a clamping end (153), and the arc-shaped edge 2 (17) is arranged on one side of the upper movable fixture (151).

3. The bending test tool for a carbon fiber wound cantilever beam according to claim 1, characterized in that: Triangular seats (21) are fixedly mounted at both ends of the left bottom beam (1) and the right bottom beam (2), adjustable feet (22) are mounted in the triangular seats (21), and universal wheels (23) are fixedly mounted at both ends of the bottoms of the left bottom beam (1) and the right bottom beam (2).

4. The bending test fixture for a carbon fiber wound cantilever beam according to claim 1, characterized in that: A mounting hole (91) is provided in the middle of the working platform (9), and a notch (92) adapted to the lifting seat (11) is provided at one end of the working platform (9).

5. The bending test fixture for a carbon fiber wound cantilever beam according to claim 1, characterized in that: The fixed clamp (14) is divided into an annular fixed clamp (144) and a square fixed clamp (145) according to the different cross-sectional shapes of the clamped cantilever beam, and the movable clamp (15) is divided into an annular movable clamp (154) and a square movable clamp (155) according to the different cross-sectional shapes of the clamped cantilever beam.

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