Sheet sample stress corrosion loading device

Abstract

A sheet sample stress corrosion loading device comprises an upper connector and a lower connector which are sequentially connected with a stretching head and a workbench of a stretching machine, an upper clamp and a lower clamp are sequentially installed on the upper connector and the lower connector, and the upper clamp and the lower clamp are each provided with a clamping cavity. The opposite sides of the upper clamp and the lower clamp are both oppositely provided with inserting openings allowing the ends of the sheet-shaped samples to be inserted into the clamping cavity, and the end wall, opposite to the inserting openings, in the clamping cavity is provided with a pressing block and a driving piece for driving the pressing block to move vertically. The transversely-moving bending piece can bend the end of the sheet-shaped sample inserted into the clamping cavity to the position below the pressing block, the pressing block is controlled to move downwards to press the end of the sheet-shaped sample to the end wall provided with the inserting opening, and then fixed clamping of the end of the sheet-shaped sample is achieved, the pressing method can be suitable for sheet-shaped samples of different thicknesses, and the clamping efficiency is improved. The device application range is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, and specifically relates to a stress corrosion loading device for sheet specimens. Technical Background

[0002] The applicant has previously applied for a Chinese patent with the publication number CN216926350U and the name of a clamping device for tensile testing of plate-shaped metal test pieces, which is used for tensile experiments on plate-shaped metal specimens. The clamping device includes an upper joint and a lower joint respectively connected to the tensile head and the workbench of a tensile machine. An upper chuck and a lower chuck are respectively installed on the upper joint and the lower joint. Both the upper chuck and the lower chuck have clamping cavities for clamping metal thin plates. Insertion ports for inserting the metal thin plates into the interior of the clamping cavities are provided on the opposite sides of the upper chuck and the lower chuck, and the two insertion ports are vertically corresponding. Both the upper chuck and the lower chuck are provided with pressing components capable of bending the metal thin plates placed in the clamping cavities. The pressing components are bolts. The clamping operation of the metal thin plates is simple and convenient for fixing, which can improve the test efficiency. When the metal thin plates are stressed, the clamped parts will not easily deform, nor will there be uneven tensile stress caused by the deformation of the metal thin plates, resulting in too large deviation of the test results and invalid test data. However, it is found in the later use of this device that due to the fixed position of the pressing components, this device can only bend and clamp plate-shaped metal test pieces with fixed specifications, and the applicable range is relatively single. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above technical problems and deficiencies, and provide a stress corrosion loading device for sheet specimens, which can clamp sheet specimens with different thicknesses and has a wide application range.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: A stress corrosion loading device for sheet specimens includes an upper joint and a lower joint respectively connected to the tensile head and the workbench of a tensile machine in sequence. The upper joint and the lower joint are sequentially installed with an upper fixture and a lower fixture. Both the upper fixture and the lower fixture have clamping cavities. Insertion ports for inserting the ends of the sheet specimens into the interior of the clamping cavities are relatively provided on the opposite sides of the upper fixture and the lower fixture. A pressing block and a driving member for driving the pressing block to move vertically are provided on the end wall of the clamping cavity opposite to the insertion port. A clamping station for clamping the ends of the sheet specimens is formed between the pressing block and the end wall of the clamping cavity provided with the insertion port. A bending member capable of extending horizontally is provided on the side wall of the clamping cavity. The extending path of the bending member is vertically corresponding to the insertion path of the end of the sheet specimen. The bending member is used to fold the end of the sheet specimen inserted into the clamping cavity to the clamping station.

[0005] As a further optimization of a stress corrosion loading device for a sheet specimen of the present utility model, the bending member is a power telescopic rod arranged horizontally. One end of the power telescopic rod is connected to the side wall of the clamping cavity, the driving member is a hydraulic rod arranged vertically. One end of the hydraulic rod is connected to the end side of the clamping cavity, and the other end is connected to the pressing block.

[0006] As a further optimization of a stress corrosion loading device for a sheet specimen of the present utility model, the bending member is a bolt horizontally rotated on the side wall of the clamping cavity. The driving member is composed of two piston rods with interconnected rodless cavities. One piston rod is vertically arranged on the end wall of the clamping cavity opposite to the socket, and its piston rod is connected to the pressing block. The other piston rod is horizontally arranged on the side wall of the clamping cavity, and the piston rod is located on the moving path of the bending member and corresponds to it.

[0007] As a further optimization of a stress corrosion loading device for a sheet specimen of the present utility model, an avoidance groove for avoiding the bending member is provided on the lower end surface of the pressing block.

[0008] As a further optimization of a stress corrosion loading device for a sheet specimen of the present utility model, protrusions for increasing friction are provided on the lower end surface of the pressing block.

[0009] As a further optimization of a stress corrosion loading device for a sheet specimen of the present utility model, both ends of the socket extend towards the open side of the clamping cavity respectively.

[0010] As a further optimization of a stress corrosion loading device for a sheet specimen of the present utility model, one end of the socket extends towards the open side of the clamping cavity.

[0011] The present utility model has the following beneficial effects: By arranging a bending member capable of extending horizontally and a pressing block capable of moving vertically in the clamping cavity, the horizontally extending bending member can bend the end of the sheet specimen inserted into the clamping cavity so that it bends below the pressing block. By controlling the downward movement of the pressing block, the end of the sheet specimen is pressed against the end wall provided with the socket, that is, the fixed clamping of the end of the sheet specimen is realized. This pressing method can be applied to sheet specimens of different thicknesses, improving the applicable range of the device. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the loading device in Embodiment 1;

[0013] Figure 2 It is a schematic structural diagram of the loading device in Embodiment 2;

[0014] Reference numerals: 1, lower joint; 2, lower clamp; 3, upper joint; 4, upper clamp; 5, clamping cavity; 6, socket; 8, bending member; 9, pressing block; 10, driving member; 10a, piston rod; 12, delivery pipe; 13, avoidance groove. Detailed Embodiments

[0015] Next, in conjunction with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described.

[0016] Embodiment 1

[0017] As Figure 1 shown, this embodiment provides a stress corrosion loading device for sheet specimens, which is used to apply stress loading to sheet specimens in stress corrosion experiments. The loading device includes an upper joint 3 connected to the stretching head of a stretching machine and a lower joint 1 connected to the workbench of the stretching machine. An upper clamp 4 and a lower clamp 2 are respectively installed on the upper joint 3 and the lower joint 1. Clamping cavities 5 for cooperatively clamping sheet specimens are provided on both the upper clamp 4 and the lower clamp 2. The clamping cavity 5 is an open cavity, and its front and rear ends penetrate outwards, which is convenient for checking the clamping situation during clamping and also convenient for taking materials after the test. Insertion ports 6 for the upper and lower ends of the sheet specimen to be inserted into the interior of the clamping cavity 5 are provided on the opposite sides of the upper clamp 4 and the lower clamp 2, and the upper and lower positions of the two insertion ports 6 are vertically corresponding. The two ends of the insertion port 6 are respectively inserted into the two clamping cavities 5 and clamped and fixed, so that the sheet specimen is in a vertical state, and then the stretching head of the stretching machine stretches, thereby applying stress loading to the sheet specimen.

[0018] In this embodiment, bending members 8 capable of bending the ends of the sheet specimens inserted into the clamping cavity 5 and pressing blocks 9 for clamping the bent ends are provided in the clamping cavity 5. The bending members 8 and the pressing blocks 9 cooperate to fix the ends of the sheet specimens in the clamping cavity 5.

[0019] In this embodiment, the pressing block 9 is arranged on the end wall of the clamping cavity 5 opposite to the insertion port 6 through a driving member 10. The driving member 10 can drive the pressing block 9 to move vertically, so that a clamping station for clamping the end of the sheet specimen is formed between the pressing block 9 and the end wall of the clamping cavity 5 provided with the insertion port 6. Only need to bend the end of the sheet specimen inserted into the clamping cavity 5 to the clamping station by the bending member 8, and the driving member 10 drives the pressing block 9 to move towards the end wall provided with the insertion port 6, and presses the end of the sheet specimen located in the clamping station against the end wall provided with the insertion port 6, that is, the fixed clamping of the end of the sheet specimen is realized. This pressing method can be applied to sheet specimens of different thicknesses and improves the application range of the device.

[0020] In this embodiment, the bending member 8 is a bolt horizontally rotated on the side wall of the clamping cavity 5, and part of its rod body is located outside the clamping cavity 5. By rotating the bending member 8, the bending member 8 can move horizontally. The extension path of the bending member 8 is vertically corresponding to the insertion path of the end of the sheet specimen. When the end of the sheet specimen is inserted into the clamping cavity 5 and is located on the moving path of the bending member 8, by rotating the bending member 8 to make it move, the end of the sheet specimen located on its moving path is bent and fixed, so that it is bent and located in the clamping station.

[0021] In this embodiment, the driving member 10 is composed of two piston rods 10a with interconnected rodless cavities. One piston rod 10a is vertically arranged on the end wall of the clamping cavity 5 opposite to the socket 6, and its piston rod is connected to the pressing block 9. The other piston rod 10a is horizontally arranged on the side wall of the clamping cavity 5, and the piston rod is located on the moving path of the bending member 8 and corresponds to it.

[0022] After the end of the sheet specimen is bent by the bending member 8 and is bent and located in the clamping station, the bending member 8 continues to move. During the movement, it contacts the piston rod of the horizontally arranged piston rod 10a. After the contact, the bending member 8 continues to move and retracts the piston rod into the piston cylinder of the piston rod 10a. The retraction of the piston rod causes the hydraulic oil in the rodless cavity of the piston rod 10a to be squeezed and pour into the rodless cavity of the vertically arranged piston rod 10a through the delivery pipe, increasing the pressure in this rodless cavity. Thus, the piston rod of this piston rod 10a is gradually moved out of the piston cylinder of the piston rod 10a, and the pressing block 9 on this piston rod can be driven to move downward, realizing the clamping and fixing of the end of the sheet specimen in the clamping station. The end of the sheet specimen is fixed by a pure mechanical method, which is stable and safe and does not require too many positioning detections and the setting of electrical devices.

[0023] In this embodiment, the horizontal movement path of the bending member 8 is located on the vertical movement path of the pressing block 9, and an avoidance groove 13 for avoiding the bending member 8 is provided on the lower end surface of the pressing block 9.

[0024] In this embodiment, in order to facilitate the two ends of the socket 6 to penetrate outward respectively, the two ends of the socket 6 extend toward the open side of the clamping cavity 5 respectively, facilitating the insertion and removal of the sheet specimen.

[0025] Embodiment 2

[0026] As Figure 2 shown, this embodiment provides a stress corrosion loading device for sheet specimens. Most of the structures of this loading device are the same as those in Embodiment 1. The difference is that: in this embodiment, the bending member 8 is a horizontally arranged power telescopic rod, and one end of the power telescopic rod is connected to the side wall of the clamping cavity 5. The driving member 10 is a vertically arranged hydraulic rod, one end of the hydraulic rod is connected to the end side of the clamping cavity 5, and the other end is connected to the pressing block 9.

[0027] In the embodiment, the power telescopic rod can adopt existing devices such as an electric push rod or a hydraulic rod. By driving the front end of the power telescopic rod to extend and move forward, the side of the sheet specimen is squeezed, pushed and bent to enter the clamping station. Then, by controlling the telescopic movement of the telescopic rod of the hydraulic rod, the end of the bent sheet specimen is clamped and fixed, realizing the fixed pressing of the sheet specimen. In this embodiment, both the bending member 8 and the driving member 10 adopt devices controlled by electrical signals to realize the fixed pressing of the sheet specimen. The advantage is that the fixing speed is fast and the working intensity of workers can be effectively reduced.

[0028] In this embodiment, one end of the socket 6 extends towards the open side of the clamping cavity 5. The unidirectional conduction socket 6 can limit the insertion of the sheet specimen, enabling the sheet specimen to be inserted in place in one step during the fixing process, which facilitates the fixed installation.

[0029] The specific embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific implementation manners, and those skilled in the art can make various deformations or modifications within the scope of the claims, which do not affect the essence of the present utility model.

Claims

1. A stress corrosion loading device for a sheet specimen, comprising an upper joint (3) and a lower joint (1) connected to a stretching head and a workbench of a stretching machine in sequence, wherein an upper clamp (4) and a lower clamp (2) are installed in sequence on the upper joint (3) and the lower joint (1), characterized in that: The upper clamp (4) and the lower clamp (2) both have a clamping cavity (5), and the upper clamp (4) and the lower clamp (2) are both provided with a socket (6) on opposite sides thereof for the end of the sheet sample to be inserted into the clamping cavity (5). The end wall of the clamping cavity (5) opposite to the socket (6) is provided with a pressure block (9) and a driving member (10) for driving the pressure block (9) to move vertically. A clamping station for clamping the end of the sheet sample is formed between the pressure block (9) and the end wall of the clamping cavity (5) provided with the socket (6). A bending member (8) capable of extending laterally is provided on the side wall of the clamping cavity (5), and the extension path of the bending member (8) corresponds vertically to the insertion path of the end of the sheet sample. The bending member (8) is used to fold the end of the sheet sample inserted into the clamping cavity (5) to the clamping station.

2. A sheet specimen stress corrosion loading device according to claim 1, characterized in that: The bending member (8) is a transversely arranged power telescopic rod, one end of which is connected to the side wall of the clamping cavity (5), and the driving member (10) is a vertically arranged hydraulic rod, one end of which is connected to the end side of the clamping cavity (5) and the other end of which is connected to the pressing block (9).

3. A sheet specimen stress corrosion loading device according to claim 1, characterized in that: The bending member (8) is a bolt that is laterally screwed on the side wall of the clamping cavity (5). The driving member (10) is composed of two piston rods (10a) that are interconnected with the rodless cavities. One of the piston rods (10a) is vertically arranged on the end wall of the clamping cavity (5) opposite to the socket (6), and its plug rod is connected to the pressure block (9). The other piston rod (10a) is laterally arranged on the side wall of the clamping cavity (5), and the plug rod is located in the moving path of the bending member (8) and corresponds to it.

4. A sheet specimen stress corrosion loading device according to claim 2, characterized in that: The lower end surface of the pressing block (9) is provided with an escape groove (13) for escaping the bending piece (8).

5. A sheet specimen stress corrosion loading device according to claim 3, characterized in that: The lower end surface of the pressing block (9) is provided with a protrusion for increasing friction.

6. A sheet specimen stress corrosion loading device according to claim 1, characterized in that: The clamping cavity (5) is an open cavity.

7. A sheet specimen stress corrosion loading device according to claim 1, characterized in that: Both ends of the insertion opening (6) extend toward the open side of the clamping cavity (5) respectively.

8. The sheet specimen stress corrosion loading device according to claim 1, characterized in that: One end of the socket (6) extends toward the open side of the clamping cavity (5).

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