Metal material bending fatigue test device

Abstract

The utility model relates to the field of metal performance tests and discloses a metal material bending fatigue test device which comprises a main body component and a clamping and changing component. The main body component comprises a machine base, a supporting plate is connected to the top end of the machine base, vertical rods are connected to the four corners of the top end of the supporting plate, a top frame is installed at the top ends of the vertical rods, and a hydraulic cylinder is installed at the bottom end of the top frame. A connecting plate movably penetrating through the vertical rod is fixed to the bottom end of the hydraulic cylinder. The side plates can ascend and descend under the action of the lifting mechanism, when a tubular sample is placed at the top ends of the two clamping plates, the two ends of the tubular sample can be clamped through ascending and descending of the two side plates, and in the process, the distance between the two clamping plates can be changed through cooperation of the driving mechanism, so that the tubular sample can be just clamped by the side plates. The clamped tubular sample is located at the top ends of the clamping plates, the areas between the clamping plates are vacant, and bending of the tubular sample is not affected. Moreover, the structure is also suitable for clamping a block-shaped test, the compatibility is strong, and the use is more convenient.

Description

Technical Field

[0001] The utility model belongs to the field of metal property tests, and specifically relates to a bending fatigue test device for metal materials. Background Art

[0002] In a bending test, one side of the specimen is subjected to tension, while the other side is subjected to compression. This stress state causes the normal stress to be mainly concentrated on the surface of the specimen. Therefore, the bending test is very sensitive to surface defects of materials and can be used to detect surface quality problems such as carburized or surface hardened layers.

[0003] For metal specimens, test specimens with cross-sections conforming to the specifications of the testing machine are usually cut for testing. For massive metal materials, rectangles can be cut during cutting to facilitate fixing with the clamps on the testing machine or can be directly placed without using clamps. However, if it is a metal pipe, the cut specimen is also tubular, and in this form, the clamping plate type clamps on the testing machine cannot be adapted. Content of the Utility Model

[0004] Technical problem to be solved: How to improve the adaptability of the clamps on the testing machine.

[0005] Technical solution: The utility model provides a bending fatigue test device for metal materials, including a main body member and a clamp modification member: The main body member includes a machine base, a support plate is connected to the top end of the machine base, vertical rods are connected to the four corners of the top end of the support plate, a top frame is installed at the top end of the vertical rods, a hydraulic cylinder is installed at the bottom end of the top frame, a connecting plate that is movably penetrated by the vertical rods is fixed to the bottom end of the hydraulic cylinder, a pressing member is installed at the bottom end of the connecting plate, and a horizontal sliding groove is opened at the top end of the support plate; The clamp modification member includes two clamping plates that are symmetrically engaged and slidably connected through the sliding groove at the top end of the support plate and a driving mechanism arranged on the support plate for driving the two clamping plates to slide in opposite directions along the sliding groove at the same time; In addition, ear plates are installed on the outer sides of the clamping plates, a side plate located outside the clamping plates and parallel to the clamping plates is arranged above the ear plates, and in the initial state, the top end of the side plate is flush with the clamping plates; In addition, a lifting mechanism for driving the side plate to lift and lower is arranged on the clamping plate.

[0006] Further, the driving mechanism includes a bearing seat installed in the middle of the sliding groove, and a bidirectional lead screw located in the sliding groove is penetrated and connected to the bearing seat; In addition, the bottom ends of the clamping plates are connected with sliders located in the sliding groove and threaded through by the bidirectional lead screw, and the threading directions of the two sliders through the bidirectional lead screw are opposite; Moreover, a rotating mechanism for driving the bidirectional lead screw to rotate is arranged outside the support plate.

[0007] Further, the rotating mechanism includes turning handles connected to both ends of the bidirectional lead screw and located outside the support plate.

[0008] Furthermore, the lifting mechanism includes a bearing connected to the bottom end of the side plate. A vertical bolt is fitted and connected to the bearing, and this bolt is threadedly penetrated and connected to the ear plate. In addition, a limiting mechanism for restricting the rotation of the side plate is provided on the ear plate.

[0009] Furthermore, the limiting mechanism includes two metal rods symmetrically arranged with respect to the bolt and movably penetrated and connected to the ear plate. The top ends of the metal rods are fixedly connected to the bottom end of the side plate.

[0010] Furthermore, a receiving hole is formed at the bottom end of the side plate, and the bearing is located in this receiving hole, and its bottom end does not extend beyond the receiving hole.

[0011] Technical effect: In the present utility model, the side plate can be lifted under the action of the lifting mechanism. When a tubular specimen is placed on the top ends of the two clamping plates, the two ends of the tubular specimen can be clamped by lifting the two side plates. During this process, through the cooperation of the driving mechanism, the distance between the two clamping plates can be changed, so that the side plate can just clamp the tubular specimen. The clamped tubular specimen is located at the top end of the clamping plate, and the area between the clamping plates is vacant, which does not affect the bending of the tubular specimen. Moreover, this structure is also applicable to clamping block-shaped specimens, with strong compatibility and more convenient use. Description of the Drawings

[0012] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0014] Figure 2 is a front view structural schematic diagram of the present utility model;

[0015] Figure 3 is a structural schematic diagram of the driving mechanism of the present utility model;

[0016] Figure 4 is a structural schematic diagram of the lifting mechanism of the present utility model;

[0017] In the figure: 1, machine base; 2, support plate; 3, vertical rod; 4, top frame; 5, hydraulic cylinder; 6, connecting plate; 7, pressing member; 8, sliding groove; 9, clamping plate; 10, driving mechanism; 1001, bearing seat; 1002, bidirectional lead screw; 1003, slider; 11, ear plate; 12, side plate; 13, lifting mechanism; 1301, bearing; 1302, bolt; 14, limiting mechanism. Detailed Embodiments

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0019] The metal material bending fatigue test device provided by this specific embodiment is as Figure 1 and Figure 2 shown, and includes a main body member and a clamping and modifying member, where:

[0020] The main body member includes a machine base 1. At the top of this machine base 1, a support plate 2 is connected. At the four corners of the top of the support plate 2, vertical rods 3 are connected. At the top of the vertical rods 3, a top frame 4 is installed. At the bottom of the top frame 4, a hydraulic cylinder 5 is installed. At the bottom of the hydraulic cylinder 5, a connecting plate 6 that movably penetrates through the vertical rod 3 is fixed. At the bottom of the connecting plate 6, a pressing member 7 is installed. In addition, a horizontal chute 8 is also opened at the top of the support plate 2.

[0021] The clamping and modifying member includes two clamping plates 9 that are symmetrically engaged and slidably connected through the chute 8 at the top of the support plate 2 and a driving mechanism 10 provided on the support plate 2 for driving the two clamping plates 9 to slide in opposite directions along the chute 8 simultaneously, as Figure 3 shown. The driving mechanism 10 includes a bearing seat 1001 installed in the middle of the chute 8. A bidirectional lead screw 1002 located in the chute 8 is connected through the bearing seat 1001. In addition, at the bottom of the clamping plate 9, a slider 1003 located in the chute 8 and threadedly penetrated by the bidirectional lead screw 1002 is connected. The threading directions of the two sliders 1003 and the bidirectional lead screw 1002 are opposite. Moreover, a rotating mechanism for driving the bidirectional lead screw 1002 to rotate is also provided outside the support plate 2. The rotating mechanism includes a turning handle connected to both ends of the bidirectional lead screw 1002 and located outside the support plate 2. In addition, an ear plate 11 is installed on the outside of the clamping plate 9. Above the ear plate 11, a side plate 12 located on the outside of the clamping plate 9 and parallel to the clamping plate 9 is provided. In the initial state, the top of the side plate 12 is flush with the clamping plate 9. In addition, a lifting mechanism 13 for driving the side plate 12 to lift and lower is provided on the clamping plate 9, as Figure 4 shown. The lifting mechanism 13 includes a bearing 1301 connected to the bottom of the side plate 12. A vertical bolt 1302 is connected in cooperation with the bearing 1301. The bolt 1302 is threadedly penetrated through the ear plate 11. In addition, since the side plate 12 will only be lifted and lowered by the bolt 1302 when it does not rotate, a limiting mechanism 14 for restricting the rotation of the side plate 12 is also provided on the ear plate 11. The limiting mechanism 14 includes two metal rods that are symmetrically arranged with respect to the bolt 1302 and movably penetrate through the ear plate 11. The top of the metal rod is fixedly connected to the bottom of the side plate 12.

[0022] It is worth mentioning that, in order not to affect the lifting height of the bolt 1302, a receiving hole may be formed at the bottom end of the side plate 12, and the bearing 1301 is located in this receiving hole, and its bottom end does not extend beyond the receiving hole. In this way, the influence of the thickness of the bearing 1301 on the lifting height of the bolt 1302 is eliminated.

[0023] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0024] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, any equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A bending fatigue test device for metal materials, comprising a main body member and a clamping and modifying member: The main body member includes a machine base (1). A support plate (2) is connected to the top end of the machine base (1). Vertical rods (3) are connected to the four corners of the top end of the support plate (2). A top frame (4) is installed at the top end of the vertical rods (3). A hydraulic cylinder (5) is installed at the bottom end of the top frame (4). A connecting plate (6) that is movably penetrated by the vertical rods (3) is fixed to the bottom end of the hydraulic cylinder (5). A pressing member (7) is installed at the bottom end of the connecting plate (6). It is characterized in that, A horizontal chute (8) is provided at the top of the support plate (2); The clamping and modifying member includes two clamping plates (9) symmetrically and slidably connected through the chute (8) at the top of the support plate (2), and a driving mechanism (10) provided on the support plate (2) for driving the two clamping plates (9) to slide in opposite directions along the chute (8) simultaneously; in addition, an ear plate (11) is installed on the outer side of the clamping plate (9), and a side plate (12) located outside the clamping plate (9) and parallel to the clamping plate (9) is provided above the ear plate (11). In the initial state, the top end of the side plate (12) is flush with the clamping plate (9); furthermore, a lifting mechanism (13) for driving the side plate (12) to lift and lower is provided on the clamping plate (9).

2. The metal material bending fatigue test device according to claim 1, characterized in that, The driving mechanism (10) includes a bearing seat (1001) installed in the middle inside the chute (8), and a bidirectional lead screw (1002) passing through the bearing seat (1001) and located in the chute (8); in addition, the bottom end of the clamping plate (9) is connected with a slider (1003) located in the chute (8) and threadedly penetrated by the bidirectional lead screw (1002). The two sliders (1003) are penetrated by the bidirectional lead screw (1002) in opposite directions; moreover, a rotating mechanism for driving the bidirectional lead screw (1002) to rotate is provided outside the support plate (2).

3. The metal material bending fatigue test device according to claim 2, characterized in that, The rotating mechanism includes a turning handle connected to both ends of the bidirectional lead screw (1002) and located outside the support plate (2).

4. The metal material bending fatigue test device according to claim 1, characterized in that The lifting mechanism (13) includes a bearing (1301) connected to the bottom end of the side plate (12), and a vertical bolt (1302) is cooperatively connected to the bearing (1301). The bolt (1302) is threadedly penetrated and connected to the ear plate (11); in addition, a limiting mechanism (14) for restricting the rotation of the side plate (12) is provided on the ear plate (11).

5. The metal material bending fatigue test device according to claim 4, wherein The limiting mechanism (14) includes two metal rods symmetrically arranged with respect to the bolt (1302) and movably penetrated and connected to the ear plate (11). The top ends of the metal rods are fixedly connected to the bottom end of the side plate (12).

6. The metal material bending fatigue test device according to claim 4, characterized in that, A receiving hole is provided at the bottom end of the side plate (12), and the bearing (1301) is located in this receiving hole, and its bottom end does not extend beyond the receiving hole.

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