Plate-shaped small sample bending fatigue test device

Abstract

The utility model discloses a plate-shaped small sample bending fatigue test device, which belongs to the field of bending fatigue test and comprises a base, a fixing component, a supporting component and a bending component, the fixing component, the supporting component and the bending component are sequentially arranged on the base, and the fixing component comprises a fixing seat, a support, a first screw and a pressing plate; the supporting assembly comprises a supporting seat, a first supporting rod, a second supporting rod, a sliding block and a second screw rod; the bending assembly comprises a fixed frame, a movable frame and a driving mechanism; through cooperation of the fixing assembly, the supporting assembly and the bending assembly, the bending fatigue test of the plate-shaped small sample can be realized by using simple small equipment, and the input cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bending fatigue testing, and in particular relates to a bending fatigue testing device for a small plate-shaped sample. Background Art

[0002] In the application of engineering materials, their mechanical properties are generally tested. In addition to conventional mechanical properties, the fatigue performance of materials is also a very important indicator. When materials or components are subjected to repeated or alternating loads, although the load amplitude of the materials or components is much smaller than their tensile strength or yield strength, or even smaller than the elastic load, after repeated deformation accumulation, the final fracture damage is usually caused by fatigue load. According to statistics, about 50% to 90% of mechanical structure damage is fatigue damage, and the phenomenon of fatigue damage is extremely widespread.

[0003] At present, bending fatigue tests on small plate-like specimens usually adopt three-point bending or four-point bending loading methods and are carried out on high-frequency fatigue testing machines. Most of the existing three-point bending fatigue testing machines are too large, expensive, and have complex equipment structures, resulting in high investment costs when testing small plate-like specimens. Utility Model Content

[0004] The utility model aims to provide a plate-shaped small sample bending fatigue test device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plate-shaped small specimen bending fatigue test device, comprising a base, a fixing assembly, a supporting assembly and a bending assembly, wherein the fixing assembly, the supporting assembly and the bending assembly are arranged on the base in sequence, wherein the fixing assembly comprises a fixing seat, a bracket, a first screw and a pressing plate, wherein the fixing seat is fixedly mounted on the base, a placement slot is provided in the middle of the fixing seat, wherein the bracket is fixedly mounted on the fixing seat, wherein there are two brackets, which are respectively arranged on both sides of the placement slot, wherein the first screw penetrates the bracket and is threadedly connected to the bracket, wherein the lower end of the first screw is rotatably connected to the pressing plate, and the pressing plate spans above the placement slot;

[0006] The support assembly includes a support seat, a first support rod, a second support rod, a slider and a second screw rod, the support seat is fixedly mounted on the base, the first support rod is fixedly mounted in the support seat, the second support rod is arranged above the first support rod, both ends of the second support rod are fixedly connected with sliders, the interiors of both sides of the support seat are threadedly connected with second screw rods, the slider is sleeved on the second screw rod and is threadedly connected with the second screw rod;

[0007] The bending assembly comprises a fixed frame, a movable frame and a driving mechanism. The fixed frame is fixedly mounted on a base, the movable frame is slidably mounted below the fixed frame, and the driving mechanism is arranged in the fixed frame and is used for driving the movable frame to reciprocate.

[0008] As a preferred implementation, a first handle is fixedly connected to the upper end of the first screw rod.

[0009] As a preferred implementation, the upper end of the second screw is fixedly connected to a second handle.

[0010] As a preferred embodiment, the driving mechanism includes a motor, a crank and a connecting rod. The motor is fixedly mounted on one side of a fixed frame, the output shaft of the motor extends into the fixed frame and is fixedly connected to one end of the crank, the other end of the crank is hinged to the connecting rod, and the other end of the connecting rod is hinged to the movable frame.

[0011] As a preferred embodiment, guide grooves are provided on both inner side walls of the fixing frame, and guide blocks that are slidably matched with the guide grooves are fixedly connected to both ends of the movable frame.

[0012] As a preferred embodiment, a non-slip pad is fixedly connected to the lower surface of the base.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The plate-shaped small sample bending fatigue test device can realize the bending fatigue test of the plate-shaped small sample by using simple small equipment through the cooperation of the fixing component, the supporting component and the bending component, thereby reducing the investment cost;

[0015] The device for testing bending fatigue of small plate-like specimens can place one end of the small plate-like specimen in the placement groove through the setting of the fixing component during the test, and then rotate the first handle to drive the first screw rod to rotate, so that the first screw rod drives the pressure plate to descend, and the small plate-like specimen is pressed and fixed in the placement groove through the pressure plate. Through the setting of the supporting component, when placing the small plate-like specimen, the small plate-like specimen is passed through the middle of the first support rod and the second support rod, and then, according to the thickness of the small plate-like specimen, the second handle can be rotated to drive the second screw rod to rotate through the second handle, so that the second screw drives the slider to rise and fall, and the height of the second support rod can be adjusted, and the distance between the first support rod and the second support rod can be adjusted appropriately, so as to support the middle part of the small plate-like specimen and improve applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2It is a structural schematic diagram of the fixing assembly of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the support assembly of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the bending component of the utility model.

[0020] In the figure: 1. base; 11. anti-slip pad; 2. fixing assembly; 21. fixing seat; 22. bracket; 23. first screw rod; 24. pressure plate; 25. placement slot; 26. first handle; 3. support assembly; 31. support seat; 32. first support rod; 33. second support rod; 34. slider; 35. second screw rod; 36. second handle; 4. bending assembly; 41. fixing frame; 42. movable frame; 43. driving mechanism; 431. motor; 432. crank; 433. connecting rod; 44. guide groove; 45. guide block. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0023] See also Figure 1-4 The utility model provides a plate-shaped small specimen bending fatigue test device, including a base 1, a fixing assembly 2, a supporting assembly 3 and a bending assembly 4. The lower surface of the base 1 is fixedly connected with an anti-slip pad 11. The fixing assembly 2, the supporting assembly 3 and the bending assembly 4 are arranged on the base 1 in sequence. The fixing assembly 2 includes a fixing seat 21, a bracket 22, a first screw 23 and a pressing plate 24. The fixing seat 21 is fixedly installed on the base 1. A placement groove 25 is opened in the middle of the fixing seat 21. The bracket 22 is fixedly installed on the fixing seat 21. There are two brackets 22, and the two brackets 22 are respectively arranged on the placement On both sides of the placement slot 25, the first screw 23 passes through the bracket 22 and is threadedly connected to the bracket 22. The upper end of the first screw 23 is fixedly connected to the first handle 26, and the lower end of the first screw 23 is rotatably connected to the pressure plate 24. The pressure plate 24 spans above the placement slot 25. Through the setting of the fixing component 2, during the test, one end of the small plate-like specimen can be placed in the placement slot 25, and then the first handle 26 is rotated. The first handle 26 drives the first screw 23 to rotate, so that the first screw 23 drives the pressure plate 24 to descend, and the small plate-like specimen is pressed and fixed in the placement slot 25 through the pressure plate 24.

[0024] Reference Figure 1 and Figure 2 The support assembly 3 includes a support seat 31, a first support rod 32, a second support rod 33, a slider 34 and a second screw 35. The support seat 31 is fixedly mounted on the base 1, the first support rod 32 is fixedly mounted in the support seat 31, the second support rod 33 is arranged above the first support rod 32, both ends of the second support rod 33 are fixedly connected with the slider 34, the interior of both sides of the support seat 31 are threadedly connected with the second screw 35, the upper end of the second screw 35 is fixedly connected with the second handle 36, the slider 34 is sleeved on the second screw 35 and It is threadedly connected to the second screw rod 35. Through the setting of the support assembly 3, when placing a small plate-like sample, the small plate-like sample is passed through the middle of the first support rod 32 and the second support rod 33. Then, according to the thickness of the small plate-like sample, the second handle 36 can be rotated, and the second screw rod 35 can be driven to rotate by the second handle 36, so that the second screw rod 35 drives the slider 34 to rise and fall, and the height of the second support rod 33 is adjusted. The distance between the first support rod 32 and the second support rod 33 is adjusted appropriately to support the middle part of the small plate-like sample.

[0025] Reference Figure 1 and Figure 4 The bending assembly 4 includes a fixed frame 41, a movable frame 42 and a driving mechanism 43. The fixed frame 41 is fixedly installed on the base 1, and the movable frame 42 is slidably installed below the fixed frame 41. The driving mechanism 43 is arranged in the fixed frame 41 and is used to drive the movable frame 42 to reciprocate. Through the setting of the bending assembly 4, the test end of the small plate-like specimen is placed in the movable frame 42. During the test, the movable frame 42 can be driven by the driving mechanism 43 to reciprocate up and down, so that the movable frame 42 drives the small plate-like specimen to repeatedly bend up and down around the first support rod 32 and the second support rod 33, so that the bending fatigue test can be performed on the small plate-like specimen.

[0026] Specifically, the driving mechanism 43 includes a motor 431, a crank 432 and a connecting rod 433. The motor 431 is fixedly installed on one side of the fixed frame 41. The output shaft of the motor 431 extends into the fixed frame 41 and is fixedly connected to one end of the crank 432. The other end of the crank 432 is hinged to the connecting rod 433, and the other end of the connecting rod 433 is hinged to the movable frame 42. Through the setting of the driving mechanism 43, the motor 431 can be started to drive the crank 432 to rotate, so that the crank 432 drives the upper end of the connecting rod 433 to perform a circular motion, and the movable frame 42 is driven to reciprocate up and down through the lower end of the connecting rod 433.

[0027] Furthermore, guide grooves 44 are provided on both inner side walls of the fixed frame 41, and guide blocks 45 that slide with the guide grooves 44 are fixedly connected to both ends of the movable frame 42. Through the cooperation between the guide grooves 44 and the guide blocks 45, the movable frame 42 can be guided, thereby improving the stability of the movable frame 42 when sliding up and down.

[0028] The working principle and use process of the utility model are as follows: first, during the test, one end of the plate-like small sample can be placed in the placement groove 25, and then the first handle 26 can be rotated to drive the first screw 23 to rotate, so that the first screw 23 drives the pressing plate 24 to descend, and the plate-like small sample is pressed and fixed in the placement groove 25 by the pressing plate 24. When placing the plate-like small sample, the plate-like small sample is passed through the middle of the first support rod 32 and the second support rod 33, and then, according to the thickness of the plate-like small sample, the second handle 36 can be rotated to pass through the second handle 33. 6 drives the second screw rod 35 to rotate, so that the second screw rod 35 drives the slider 34 to rise and fall, adjusts the height of the second support rod 33, and adjusts the spacing between the first support rod 32 and the second support rod 33 to be appropriate, supports the middle part of the small plate-like specimen, and places the test end of the small plate-like specimen in the movable frame 42. During the test, the movable frame 42 can be driven by the driving mechanism 43 to reciprocate up and down, so that the movable frame 42 drives the small plate-like specimen to bend up and down repeatedly around the first support rod 32 and the second support rod 33, so that the bending fatigue test can be performed on the small plate-like specimen.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plate-shaped small specimen bending fatigue test device, comprising a base (1), a fixing assembly (2), a supporting assembly (3) and a bending assembly (4), characterized in that: The fixing assembly (2), the supporting assembly (3) and the bending assembly (4) are sequentially arranged on the base (1); the fixing assembly (2) comprises a fixing seat (21), a bracket (22), a first screw rod (23) and a pressing plate (24); the fixing seat (21) is fixedly mounted on the base (1); a placement groove (25) is provided in the middle of the fixing seat (21); the bracket (22) is fixedly mounted on the fixing seat (21); there are two brackets (22), and the two brackets (22) are respectively arranged on both sides of the placement groove (25); the first screw rod (23) passes through the bracket (22) and is threadedly connected to the bracket (22); the lower end of the first screw rod (23) is rotatably connected to the pressing plate (24); and the pressing plate (24) spans above the placement groove (25); The support assembly (3) comprises a support seat (31), a first support rod (32), a second support rod (33), a slider (34) and a second screw rod (35); the support seat (31) is fixedly mounted on the base (1); the first support rod (32) is fixedly mounted in the support seat (31); the second support rod (33) is arranged above the first support rod (32); both ends of the second support rod (33) are fixedly connected with the slider (34); the interiors of both sides of the support seat (31) are threadedly connected with the second screw rod (35); the slider (34) is sleeved on the second screw rod (35) and is threadedly connected with the second screw rod (35); The bending assembly (4) comprises a fixed frame (41), a movable frame (42) and a driving mechanism (43); the fixed frame (41) is fixedly mounted on the base (1); the movable frame (42) is slidably mounted below the fixed frame (41); and the driving mechanism (43) is arranged in the fixed frame (41) and is used to drive the movable frame (42) to reciprocate.

2. A plate-shaped small specimen bending fatigue test device according to claim 1, characterized in that: The upper end of the first screw rod (23) is fixedly connected to a first handle (26).

3. A plate-shaped small specimen bending fatigue test device according to claim 1, characterized in that: The upper end of the second screw rod (35) is fixedly connected to a second handle (36).

4. A plate-shaped small specimen bending fatigue test device according to claim 1, characterized in that: The driving mechanism (43) comprises a motor (431), a crank (432) and a connecting rod (433); the motor (431) is fixedly mounted on one side of a fixing frame (41); an output shaft of the motor (431) extends into the fixing frame (41) and is fixedly connected to one end of the crank (432); the other end of the crank (432) is hinged to the connecting rod (433); and the other end of the connecting rod (433) is hinged to the movable frame (42).

5. The plate-shaped small specimen bending fatigue test device according to claim 1, characterized in that: Both inner side walls of the fixed frame (41) are provided with guide grooves (44), and both ends of the movable frame (42) are fixedly connected with guide blocks (45) that are slidably matched with the guide grooves (44).

6. A plate-shaped small specimen bending fatigue test device according to claim 1, characterized in that: An anti-slip pad (11) is fixedly connected to the lower surface of the base (1).

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