Metal material fatigue test equipment

Abstract

The utility model discloses metal material fatigue test equipment, which comprises a working table and is characterized in that two test structures capable of driving one point of a material to bend bidirectionally and cylinders for respectively driving the two test structures in turn are arranged on the working table; lever linkage structures for increasing the bending force are arranged between the two air cylinders and the testing structure respectively, an adjustable pushing piece is arranged on the testing structure, and two adjustable installation bases used for fixing materials are further arranged on the workbench. According to the utility model, the fatigue test of repeated bidirectional bending of one point of a metal material is realized through a simpler structure, the cylinder is adopted for driving, the lever linkage structure is utilized to enable the cylinder to easily drive the test structure to work, the equipment cost is lower, and the power consumption is low. Through the adjustable push piece, the space of the testing structure for bidirectional bending of the material can be adjusted so as to adapt to the size of the material.

Description

Technical Field

[0001] The utility model particularly relates to a metal material fatigue testing device. Background Art

[0002] Metal fatigue refers to the process by which materials and components, under cyclic stress or cyclic strain, gradually develop localized permanent cumulative damage in one or more locations, leading to cracks or sudden complete fracture after a certain number of cycles. When materials and structures are subjected to repeatedly changing loads, even if the stress value never exceeds the material's strength limit, or even falls below its elastic limit, failure may occur. This phenomenon of material and structure damage under repeated alternating loads is called metal fatigue failure.

[0003] Fatigue testing of metal materials is most effective when repeated bidirectional bending is performed at a specific point. Existing fatigue testing equipment typically employs complex structures and drive methods, often using multiple electrical devices to perform fatigue testing. This results in lengthy testing times, high equipment costs, and high power consumption. The reason for not using a pneumatic cylinder is that the force exerted by a cylinder directly on the material is too low, making it difficult to achieve smooth bending. Utility Model Content

[0004] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide a metal material fatigue testing device driven by a cylinder, which can realize fatigue testing of repeated bidirectional bending of a point of metal material with less equipment cost and electricity cost.

[0005] In order to achieve the above object, the present invention provides the following solutions:

[0006] A metal material fatigue testing device includes a workbench, on which are arranged two test structures that can drive one point of the material to bend in both directions, and cylinders that drive the two test structures in turn, respectively, and a lever linkage structure that increases the bending force is arranged between the two cylinders and the test structure, an adjustable push piece is provided on the test structure, and two adjustable mounting seats for fixing the material are also provided on the workbench.

[0007] Furthermore, the two test structures in the present invention are symmetrically arranged on the left and right sides of the workbench. The test structure includes a slide rail arranged on the side of the workbench, a slider is arranged at the upper limit of the slide rail, and a push plate is fixed on the top of the slider.

[0008] Furthermore, the adjustable push piece in the utility model includes a push rod inserted on the inner end of the push plate, a vertical push piece for pushing the material to bend it is provided at the inner end of the push rod, an adjustment groove is provided on the push plate, and a locking bolt tightened on the push rod is provided in the adjustment groove.

[0009] Furthermore, the top end of the vertical push member in the present invention is an arc-shaped structure.

[0010] Furthermore, the two cylinders in the present invention are respectively arranged on the front and rear sides of the workbench and on opposite side walls.

[0011] Furthermore, a smooth plug is installed on the movable end of the cylinder in the utility model.

[0012] Furthermore, the lever linkage structure in the utility model includes a linkage rod hinged to the bottom of the workbench, one end of the linkage rod is provided with a side groove, and the other end is provided on the side of the movable end of the cylinder. A sliding column is fixed at the bottom of the slider and inserted into the side groove for limiting movement. The length of the linkage rod close to the cylinder is longer than the length close to the slider.

[0013] Furthermore, the two adjustable mounting seats in the present invention are symmetrically arranged on the front and rear sides of the workbench respectively, and the adjustable mounting seats include two T-slots symmetrically arranged on the left and right sides of the workbench, and clamping blocks are arranged on the left and right sides of the top of the workbench, and connecting pieces corresponding to the T-slots are arranged on the front and rear sides of the clamping blocks, and fastening bolts that can be installed on the connecting pieces are arranged in the T-slots, and a closed net is arranged on the top of one of the clamping blocks.

[0014] In summary, the present invention has the following beneficial effects compared to the prior art:

[0015] This new device utilizes a simpler structure to perform fatigue testing on a single point of metal material by repeatedly bending it in both directions. It utilizes a pneumatic cylinder for driving the device, and a lever-linked mechanism allows the cylinder to easily drive the test structure, resulting in lower equipment costs and reduced power consumption. An adjustable pusher adjusts the space within which the test structure can bend the material in both directions to suit the material's dimensions. An adjustable mounting bracket also adjusts the space within which the material is mounted to suit the material's dimensions, securing the material. This device is particularly suitable for securing dimensionally unstable metal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the three-dimensional schematic diagrams of the present utility model;

[0017] Figure 2 This is the second three-dimensional schematic diagram of the utility model;

[0018] Figure 3 This is a bottom view schematic diagram of the present utility model;

[0019] Figure 4 This is a three-dimensional exploded schematic diagram of the adjustable push piece of the utility model;

[0020] Figure 5 This is a schematic exploded perspective view of the adjustable mounting base of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] like Figures 1 to 5 As shown, the embodiment of the present invention preferably provides a metal material fatigue testing device, including a workbench 1, on which are arranged two test structures 2 that can drive one point of the material to bend in both directions, and cylinders 3 that drive the two test structures 2 in turn, respectively, and lever linkage structures 4 that increase the bending force are respectively arranged between the two cylinders 3 and the test structure 2, and an adjustable pusher 5 is arranged on the test structure 2. Two adjustable mounting seats 6 for fixing the material are also arranged on the workbench 1. When in use, the metal material is placed on the adjustable mounting seat, and the part to be tested is placed in the test structure. After the cylinder is started, the bending force of the test structure on the material is increased by the lever linkage structure, and the material test part is repeatedly bent in both directions, thereby testing its metal fatigue. The principle of the lever is used to reduce the force that the cylinder needs to use on the test structure, so that the cylinder can bend the material test part.

[0023] In this utility model, two test structures 2 are symmetrically arranged on the left and right sides of the workbench 1. Each test structure 2 includes a slide rail 21 mounted on the side of the workbench 1. A slider 22 is positioned at the upper limit of the slide rail 21, and a push plate 23 is fixed to the top of the slider 22. The slider can move within the slide rail, thereby enabling the push plate to move. The slider is driven by a lever linkage structure, and the movement of the push plate drives the vertical push member to bend the material. Because the slide rail is elongated and the outer walls of the slider fit closely with the inner walls of the slide rail, the slider can slide linearly within the slide rail.

[0024] The adjustable pusher 5 of the present invention includes a push rod 51 inserted into the inner end of the push plate 23. A vertical pusher 52 is provided at the inner end of the push rod 51 for pushing and bending the material. An adjustment slot 53 is provided on the push plate 23. A locking bolt 54 is provided in the adjustment slot 53 and is tightened on the push rod 51. By loosening the locking bolt on the push rod, the push rod can move linearly within the push plate. The adjustment slot allows the locking bolt to slide, thereby adjusting the distance between the vertical pushers on both sides. The vertical pushers serve as the components that push and bend the material. Adjusting the distance between the vertical pushers on both sides can accommodate materials of different sizes.

[0025] The top of the vertical push piece 52 described in the present invention is an arc structure 7. The arc structure is that the top of the vertical push piece has a certain curvature, which can prevent the material from accidentally detaching during the bending process.

[0026] In the present invention, the two cylinders 3 are respectively arranged on the front and rear sides of the workbench 1 and on opposite side walls. The cylinders are arranged in a position to cooperate with the lever linkage structure. The two cylinders are activated in turn. After one vertical pusher bends the material to one side, the activated cylinder is stopped and the other cylinder is activated. The other vertical pusher bends the material in the opposite direction to the other side. In this reciprocating manner, the material is subjected to a two-way bending fatigue test.

[0027] In the present invention, a smooth top head 31 is installed on the movable end of the cylinder 3. It is used to reduce the top pressure wear of the movable end of the cylinder to the end of the connecting rod.

[0028] The lever linkage structure 4 described in the present invention includes a linkage rod 41 hinged to the bottom of the workbench 1. One end of the linkage rod 41 is provided with a side groove 42, and the other end is provided on the side of the movable end of the cylinder 3. A sliding column 43 is fixedly provided at the bottom of the slider 22 and inserted into the side groove 42 for limiting movement. The length of the linkage rod 41 near the cylinder 3 is longer than the length near the slider 22. The specific usage process is that the linkage rod presses the longer end through the cylinder to swing the end with the side groove, thereby driving the sliding column in the side groove to move, and then allowing the slider fixed to the sliding column to move in the slide groove. The lever principle is based on the hinge point. The ratio of the length of the linkage rod near the cylinder end to the length of the linkage rod near the slider end is approximately 2:1, which allows the cylinder to use less force to drive the material to bend.

[0029] In the present invention, the two adjustable mounting seats 6 are symmetrically arranged on the front and rear sides of the workbench 1, and the adjustable mounting seats 6 include two T-slots 61 symmetrically arranged on the left and right sides of the workbench 1. Clamps 62 are arranged on the left and right sides of the top of the workbench 1, and connectors 63 corresponding to the T-slots 61 are arranged on the front and rear sides of the clamps 62. Fastening bolts 64 that can be installed on the connectors 63 are arranged in the T-slots 61, and a closed net 65 is arranged on the top of one of the clamps 62. The T-slot allows the fastening bolts to slide inside after being loosened, thereby realizing the adjustable movement of the clamp. After moving to the desired position, the fastening bolts can be re-tightened to fix the clamp. The closed net is used to block the space formed between the two clamps so that the metal material in it will not be separated during the test process.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal material fatigue testing device, comprising a workbench (1), characterized in that: Two test structures (2) capable of driving a material to bend in two directions at one point are provided on the workbench (1), and cylinders (3) are provided for driving the two test structures (2) in turn. Lever linkage structures (4) for increasing the bending force are provided between the two cylinders (3) and the test structures (2). An adjustable pusher (5) is provided on the test structure (2). Two adjustable mounting seats (6) for fixing the material are also provided on the workbench (1).

2. The metal material fatigue testing device according to claim 1, characterized in that: The two test structures (2) are symmetrically arranged on the left and right sides of the workbench (1). The test structure (2) includes a slide rail (21) arranged on the side of the workbench (1), a slider (22) is arranged at the upper limit of the slide rail (21), and a push plate (23) is fixed on the top of the slider (22).

3. The metal material fatigue testing device according to claim 2, characterized in that: The adjustable push piece (5) includes a push rod (51) inserted on the inner end of the push plate (23), a vertical push piece (52) for pushing the material to bend it is provided at the inner end of the push rod (51), an adjustment groove (53) is provided on the push plate (23), and a locking bolt (54) is provided in the adjustment groove (53) and is tightened on the push rod (51).

4. The metal material fatigue testing device according to claim 3, characterized in that: The top of the vertical push member (52) is an arc-shaped structure (7).

5. A metal material fatigue testing device according to any one of claims 1 to 4, characterized in that: The two cylinders (3) are respectively arranged on the front and rear sides of the workbench (1) and are located on opposite side walls.

6. A metal material fatigue testing device according to any one of claims 1 to 4, characterized in that: A smooth plug (31) is mounted on the movable end of the cylinder (3).

7. The metal material fatigue testing device according to claim 2, characterized in that: The lever linkage structure (4) includes a linkage rod (41) hinged on the bottom of the workbench (1), one end of the linkage rod (41) is provided with a side groove (42), and the other end is provided on one side of the movable end of the cylinder (3). A sliding column (43) is fixed at the bottom of the slider (22) and inserted into the side groove (42) for limiting movement. The length of the linkage rod (41) close to the cylinder (3) is longer than the length close to the slider (22).

8. The metal material fatigue testing device according to claim 1, characterized in that: The two adjustable mounting seats (6) are symmetrically arranged on the front and rear sides of the workbench (1), respectively. The adjustable mounting seats (6) include two T-shaped slots (61) symmetrically arranged on the left and right sides of the workbench (1), clamping blocks (62) are arranged on the left and right sides of the top of the workbench (1), and connecting pieces (63) corresponding to the T-shaped slots (61) are arranged on the front and rear sides of the clamping blocks (62). A fastening bolt (64) that can be installed on the connecting piece (63) is arranged in the T-shaped slot (61), and a closing net (65) is arranged on the top of one of the clamping blocks (62).

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