Drop hammer impact compression and uniaxial tensile test conversion device

Abstract

The invention discloses a drop hammer impact compression and uniaxial tensile test conversion device which comprises a main body frame, a sample support is arranged at the position, corresponding to a hammer body assembly, of a main body frame base, and a secondary impact prevention structure is arranged on the main body frame base around the sample support; the sample bracket comprises a transfer table, two connecting rods, two sliding blocks and four cylindrical shafts; wherein the conversion table is connected with the sliding blocks through the connecting rods and the cylindrical shafts, and the bottoms of the two sliding blocks are clamped on the sliding ways of the base of the main body frame and can slide in the horizontal direction; the opposite side surfaces of the two sliding blocks are used for clamping a sample; the drop hammer impact hammer head impacts the conversion table, the conversion table drives the connecting rod to press downwards, the connecting rod serves as a linkage mechanism and drives the slide to move towards the two sides on the base of the main body frame, conversion from compression to uniaxial stretching is achieved, and the value of the uniaxial stretching force borne by a sample can be determined conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of testing equipment, and in particular relates to a drop weight impact compression and uniaxial tension test conversion device. Background Art

[0002] At present, the equipment for tensile testing of structural impact resistance can be divided into two types according to the range of material loading strain rate, which correspond to the Hopkinson bar test device used for high strain rate and the drop hammer impact device used for medium speed impact, and the fast loading actuator used for low speed impact. In actual engineering, a large number of examples belong to medium and low speed impact processes. For the test of such problems, the drop hammer impact device is a simple and reliable loading device.

[0003] In the existing drop-hammer vertical impact-stretching conversion device, the drop hammer falls vertically along the guide rail and vertically impacts the test specimen fixed on the test bench, so as to study the dynamic mechanical properties of the specimen under impact load. However, due to the existence of the inertial force of the drop hammer impact, the force sensor placed in the drop hammer will measure the inertial force at the same time, which affects the reasonable evaluation of the impact resistance of the structural component. In addition, the vertical impact-stretching conversion device has a complex structure, the size of the test specimen is limited, and large-scale tests cannot be carried out. In addition, the existing drop hammer impact device has no limit device, and precise loading cannot be achieved, which affects the applicability of the device. Summary of the invention

[0004] The invention provides a drop weight impact compression and uniaxial tension test conversion device, which can solve the problems existing in the prior art.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] The embodiment of the present invention provides a drop-hammer impact compression and uniaxial tension test conversion device, comprising a main frame (2), a hammer lifting device (1) being arranged on the top of the main frame (2), two slide rails (3) being connected between the hammer lifting device (1) and the base of the main frame (2), the two slide rails (3) being equipped with a hammer grabbing and releasing device (4) and a hammer assembly (5); the hammer grabbing and releasing device (4) being used to grab or release the hammer assembly (5); a sample holder (6) being arranged on the base of the main frame (2) at a position corresponding to the hammer assembly (5), and a secondary impact prevention structure (7) being arranged around the sample holder (6) on the base of the main frame (2).

[0007] In an optional embodiment of the present invention, the secondary impact protection structure (7) is an annular rubber ring.

[0008] According to an optional embodiment of the present invention, the sample holder (6) comprises a conversion table (7), two connecting rods (8), four cylindrical shafts (9) and two sliding blocks (10); wherein the conversion table (7) is connected to the sliding blocks (10) via the connecting rods (8) and the cylindrical shafts (9); the bottoms (10-4) of the two sliding blocks (10) are clamped on the slideway of the base of the main frame (2) and can slide in the horizontal direction; the opposite sides of the two sliding blocks (10) are used to fix and connect the samples (11).

[0009] In an optional embodiment of the present invention, the length and width of the conversion platform (7) are 80×74, and rectangular slots (7-1) of 20×15.5 are provided at the left and right ends of the conversion platform (7) to facilitate insertion of the connecting rod (8); circular holes (7-2) with a diameter of 10 mm are provided on the front and rear sides of the conversion platform (7) for connecting the cylindrical shaft (9) to facilitate rotation of the connecting rod (8).

[0010] In an optional embodiment of the present invention, the connecting rod (8) is 15 mm thick and has circular holes (8-1) with a diameter of 10.5 mm at the upper and lower parts thereof, respectively, into which the cylindrical shaft (9) can be inserted, and the centers of the circular holes (8-1) at the upper and lower parts are 40 mm apart.

[0011] In an optional embodiment of the present invention, the connecting rod (8) is used to convert the impact force in the vertical direction into a uniaxial tensile force in the horizontal direction; the cylindrical shaft (9) serves as a force-bearing component, transmitting the force received by the conversion platform (7) to the connecting rod (8), and also transmitting the force received by the connecting rod (8) to the slider (10); wherein, the length of the cylindrical shaft (9) is 88 mm, and two through holes (9-1) of 2.3 mm in size are formed at both ends thereof for inserting a cotter pin to prevent the cylindrical shaft (9) from falling out.

[0012] In an optional embodiment of the present invention, the upper surface of the slider (10) has two holes (10-2) with a size of 8.3 mm and a depth of 10 mm for placing two springs, and the two springs are used to ensure that the conversion platform (7) always maintains a horizontal rise and fall; the left side of the slider (1) has a through hole (10-1) with a diameter of 10.5 mm for mounting a cylindrical shaft (4); the threaded hole (3) on the front side of the slider (1) is used to connect a sample (11); the middle position of the slider (10) has a stepped groove (10-5) for increasing the movement angle of the connecting rod (8) to prevent it from getting stuck.

[0013] Compared with the prior art, an embodiment of the present invention provides a drop-hammer impact compression and uniaxial tension test conversion device, which has the following beneficial effects: the drop-hammer impact compression and uniaxial tension test conversion device has simple structure and processing and manufacturing, is easy to assemble and install, and has detachable parts; the impact force in the vertical direction brought by the hammer head of the hammer assembly can be directly converted into a uniaxial tension force in the horizontal direction in terms of numerical value, which is convenient for determining the numerical value of the uniaxial tension force exerted on the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic diagram of the structure of a drop weight impact compression and uniaxial tension test conversion device provided in an embodiment of the present application.

[0016] Figure 2 A schematic diagram of an electrical control cabinet for a drop weight impact compression and uniaxial tension test conversion device provided in an embodiment of the present application.

[0017] Figure 3 A schematic diagram of a specimen holder for a drop weight impact compression and uniaxial tension test conversion device provided in an embodiment of the present application.

[0018] Figure 4 A schematic diagram of a conversion platform for a sample holder provided in an embodiment of the present application.

[0019] Figure 5 A schematic diagram of a connecting rod of a sample holder provided in an embodiment of the present application.

[0020] Figure 6 A schematic diagram of a cylindrical axis of a sample holder provided in an embodiment of the present application.

[0021] Figure 7 A schematic diagram of a slider of a sample holder provided in an embodiment of the present application.

[0022] Figure 8 A schematic diagram of a hammer assembly impact specimen holder provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0024] like Figure 1 As shown, a drop hammer impact compression and uniaxial tension test conversion device provided by the embodiment of the present application includes a main frame 2, a hammer lifting device 1 is arranged on the top of the main frame 2, two slide rails 3 are connected between the hammer lifting device 1 and the base of the main frame 2, and the two slide rails 3 are installed with a hammer grabbing and releasing device 4 and a hammer assembly 5; the hammer grabbing and releasing device 4 is used to grab or release the hammer assembly 5; a sample holder 6 is arranged at the base of the main frame 2 corresponding to the position of the hammer assembly 5, and an anti-secondary impact structure 7 is arranged around the sample holder 6 at the base of the main frame 2, and the anti-secondary impact structure 7 is an annular rubber ring. Figure 2 As shown, the drop hammer impact compression and uniaxial tension test conversion device also includes an electric control cabinet 4 - 1 for controlling the grabbing and releasing hammer device 4 to move up and down on the two slide rails 3 .

[0025] Figure 3 Combination Figure 1 The sample holder 6 includes a conversion table 7, two connecting rods 8, four cylindrical shafts 9 and two sliders 10. The conversion table 7 is connected to the sliders 10 through the connecting rods 8 and the cylindrical shafts 9. The bottoms 10-4 of the two sliders 10 are clamped on the slideway of the base of the main frame 2 and can slide in the horizontal direction. The opposite sides of the two sliders 10 are used to fix and connect the samples 11.

[0026] like Figure 4 As shown, the length and width of the conversion platform 7 are 80×74, and a 20×15.5 rectangular slot 7-1 is provided at the left and right ends of the conversion platform 7 to facilitate the insertion of the connecting rod 8; a 10mm diameter round hole 7-2 is provided on the front and rear sides of the conversion platform 7 for connecting the cylindrical shaft 9 to facilitate the rotation of the connecting rod 8.

[0027] like Figure 5 As shown, the connecting rod 8 is 15 mm thick, and has circular holes 8-1 with a diameter of 10.5 mm at the upper and lower parts thereof, respectively, into which the cylindrical shaft 9 can be inserted, and the centers of the circular holes 8-1 at the upper and lower parts are 40 mm apart.

[0028] like Figure 6As shown, the connecting rod 8 is used to convert the impact force in the vertical direction into the uniaxial tensile force in the horizontal direction; the cylindrical shaft 9, as a force bearing component, transmits the force received by the conversion platform 7 to the connecting rod 8, and also transmits the force received by the connecting rod 8 to the slider 10. The length of the cylindrical shaft 9 is 88 mm, and two through holes 9-1 with a size of 2.3 mm are opened at both ends of the cylindrical shaft 9 for inserting the split pin to prevent the cylindrical shaft 9 from falling out.

[0029] like Figure 7 As shown, there are two holes 10-2 with a size of 8.3 mm and a depth of 10 mm on the upper surface of the slider 10 for placing two springs, which are used to ensure that the conversion platform 7 always maintains a horizontal rise and fall. A through hole 10-1 with a diameter of 10.5 mm is opened on the left side of the slider 1 for installing the cylindrical shaft 4. The threaded hole 3 on the front side of the slider 1 is used to connect the sample 11. A stepped groove 10-5 is opened in the middle position of the slider 10 to increase the movement angle of the connecting rod 8 to prevent it from getting stuck.

[0030] Figure 8 Combination Figure 3 and Figure 1 In this embodiment, the sample holder 6 is placed on the base 2-1 of the main frame 2, and the round hammer head 5-1 with a diameter of 6.5 cm is set at the bottom of the hammer assembly 5. The round hammer head 5-1 with a diameter of 6.5 cm impacts the sample holder 6, and the falling hammer impacts the hammer head to impact the conversion table 7, and the conversion table 7 drives the connecting rod 8 to press down. The connecting rod 8 acts as a linkage mechanism to drive the slide 10 to move to both sides on the base of the main frame 2, realizing the conversion from compression to uniaxial tension. That is, the impact force in the vertical direction brought by the hammer head of the hammer assembly can be directly converted into the uniaxial tension force in the horizontal direction in terms of value, which is convenient for determining the value of the uniaxial tension force on the sample.

[0031] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A drop weight impact compression and uniaxial tension test conversion device, characterized in that: The invention comprises a main frame (2), wherein a hammer lifting device (1) is arranged on the top of the main frame (2), two slide rails (3) are connected between the hammer lifting device (1) and the base of the main frame (2), and the two slide rails (3) are equipped with a hammer grabbing and releasing device (4) and a hammer assembly (5); the hammer grabbing and releasing device (4) is used to grab or release the hammer assembly (5); a sample holder (6) is arranged on the base of the main frame (2) at a position corresponding to the hammer assembly (5), and a secondary impact prevention structure (7) is arranged around the sample holder (6) on the base of the main frame (2).

2. A drop weight impact compression and uniaxial tension test conversion device according to claim 1, characterized in that: The secondary impact protection structure (7) is an annular rubber ring.

3. The drop weight impact compression and uniaxial tension test conversion device according to claim 1, characterized in that: The sample holder (6) comprises a conversion platform (7), two connecting rods (8), four cylindrical shafts (9) and two sliding blocks (10); wherein the conversion platform (7) is connected to the sliding blocks (10) via the connecting rods (8) and the cylindrical shafts (9); the bottoms (10-4) of the two sliding blocks (10) are clamped on the slideway of the base of the main frame (2) so as to be able to slide in the horizontal direction; the opposite sides of the two sliding blocks (10) are used for fixing and connecting the samples (11).

4. The drop weight impact compression and uniaxial tension test conversion device according to claim 3 is characterized in that: The length and width of the conversion platform (7) are 80×74, and rectangular slots (7-1) of 20×15.5 are provided at the left and right ends of the conversion platform (7) to facilitate insertion of the connecting rod (8); circular holes (7-2) with a diameter of 10 mm are provided on the front and rear sides of the conversion platform (7) to connect the cylindrical shaft (9) to facilitate rotation of the connecting rod (8).

5. The drop weight impact compression and uniaxial tension test conversion device according to claim 4, characterized in that: The connecting rod (8) is 15 mm thick and has circular holes (8-1) with a diameter of 10.5 mm at the upper and lower parts thereof, respectively, into which the cylindrical shaft (9) can be inserted. The centers of the circular holes (8-1) at the upper and lower parts are 40 mm apart.

6. A drop weight impact compression and uniaxial tension test conversion device according to claim 5, characterized in that: The connecting rod (8) is used to convert the impact force in the vertical direction into a uniaxial tensile force in the horizontal direction; the cylindrical shaft (9) serves as a force-bearing component, transmitting the force received by the conversion platform (7) to the connecting rod (8), and also transmitting the force received by the connecting rod (8) to the slider (10); wherein, the length of the cylindrical shaft (9) is 88 mm, and two through holes (9-1) of 2.3 mm in size are opened at both ends thereof for inserting a cotter pin to prevent the cylindrical shaft (9) from falling out.

7. A drop weight impact compression and uniaxial tension test conversion device according to claim 6, characterized in that: The upper surface of the slider (10) has two holes (10-2) with a size of 8.3 mm and a depth of 10 mm for placing two springs, and the two springs are used to ensure that the conversion platform (7) always maintains a horizontal rise and fall; the left side of the slider (1) has a through hole (10-1) with a diameter of 10.5 mm for mounting the cylindrical shaft (4); the threaded hole (3) on the front side of the slider (1) is used to connect the sample (11); the middle position of the slider (10) has a stepped groove (10-5) for increasing the movement angle of the connecting rod (8) to prevent it from getting stuck.

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