Charpy pendulum impact sample centering device

Abstract

The utility model relates to a Charpy pendulum impact sample centering device which comprises a positioning sliding block, an adjustable limiting screw rod and a driving air cylinder, wherein the positioning sliding block, the adjustable limiting screw rod and the driving air cylinder are arranged beside a supporting seat in a Charpy pendulum impact test device; one end of the positioning sliding block is connected with a piston rod of the driving air cylinder through the adjustable limiting screw rod. The Charpy pendulum impact sample centering device provided by the utility model can quickly position the impact sample, is high in centering precision, is particularly suitable for a low-temperature Charpy pendulum impact test, can avoid centering and positioning a clamp due to manual operation, and solves the technical problem that the error fluctuation of an impact value is relatively large due to long centering time and low centering precision in conventional operation.

Description

Technical Field

[0001] The utility model relates to a Charpy pendulum impact specimen centering device, belonging to the technical field of material mechanics. Background Art

[0002] The Charpy pendulum impact test is a common test method in the field of material mechanics testing technology. The Charpy pendulum impact specimen is generally 55 mm × 10 mm × 10 mm. The Charpy pendulum impact test has V-shaped, U-shaped notch and no notch processing requirements for the impact specimen.

[0003] The existing Charpy pendulum impact test equipment uses an L-shaped support base to support both ends of the sample, and then the pendulum impacts the middle position of the sample. In this way, the centering accuracy of the impact sample will affect the absorption of the pendulum impact energy, thereby affecting the value of the sample impact energy. The existing Charpy pendulum impact test generally uses Figure 2 The positioning clamp shown is used to hold the sample and put it in place. The disadvantages are long operation time and low centering accuracy, which leads to large fluctuations in the impact energy value error. Especially in low-temperature impact tests, the centering operation time of the impact specimen will affect the temperature of the specimen, thus forming an error in the impact energy value of the specimen. Summary of the invention

[0004] The utility model aims to solve the technical problem of overcoming the disadvantages of the above-mentioned technology and providing a sample centering device which can quickly realize the positioning of the impact sample, has high centering accuracy and short positioning time and is particularly suitable for low-temperature Charpy pendulum impact test.

[0005] In order to solve the above technical problems, the technical solution proposed in the utility model is: a Charpy pendulum impact specimen centering device, comprising: a positioning slider, an adjustable limit screw and a driving cylinder arranged next to a support seat in the Charpy pendulum impact test device; one end of the positioning slider is connected to the piston rod of the driving cylinder through the adjustable limit screw; the positioning slider can move between a first position and a second position under the drive of the driving cylinder; when the positioning slider is located at the first position, the specimen is placed on the support seat in the Charpy pendulum impact test device, and one end of the specimen is placed against the other end of the positioning slider; when the positioning slider moves from the first position to the second position, the specimen can be pushed to move to a predetermined position of the Charpy pendulum impact test.

[0006] A further improvement of the above scheme is that the action of the driving cylinder is linked to the safety door of the Charpy pendulum impact test device. When the safety door is opened, the driving cylinder drives the positioning slider to move to the first position. When the safety door is closed, the driving cylinder drives the positioning slider to move to the second position.

[0007] A further improvement of the above scheme is that the positioning slider includes a slider and a connecting block installed together by bolts, and the relative position between the slider and the connecting block can be adjusted by changing the installation position of the bolts.

[0008] The Charpy pendulum impact specimen centering device provided by the utility model can quickly realize the positioning of the impact specimen with high centering accuracy, is particularly suitable for low-temperature Charpy pendulum impact tests, can avoid the need for manual operation of the centering positioning clamp, and solves the technical problem that the conventional operation has a long centering time and low centering accuracy resulting in large impact value error fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of a preferred embodiment of the utility model.

[0010] Figure 2 It is a schematic diagram of the positioning clamp structure in the prior art. Implementation

[0011] Embodiment: The Charpy pendulum impact specimen centering device of this embodiment is as follows: Figure 1 As shown, it includes: a positioning slider, an adjustable limit screw 6 and a driving cylinder 7 arranged beside a support seat 2 in a Charpy pendulum impact test device. The positioning slider includes a slider 4 and a connecting block 5 installed together by bolts. By changing the installation position of the bolts, the relative position between the slider 4 and the connecting block 5 can be adjusted, so that the length of the positioning slider can be adjusted in a large range, thereby roughly adjusting the position of the sample 3.

[0012] One end of the positioning slide block is connected to the piston rod of the driving cylinder 7 via an adjustable limit screw 6; by adjusting the adjustable limit screw 6, the length of the screw 6 can be adjusted within a smaller range, thereby accurately adjusting the position of the sample 3.

[0013] The action of the driving cylinder 7 is automatically controlled by the solenoid valve, compressed air, gas pressure regulating table, safety door limit switch and PLC controller to drive the positioning and return actions of the positioning slider. When the safety door limit switch is turned on, the safety door limit switch triggers a signal to the PLC controller to open the solenoid valve, supply air to the driving cylinder 7 to retract the piston rod of the driving cylinder 7, drive the positioning slider to move, avoid, and make room for placing the sample 3. The operator places the sample 3 on the support seat 2 to ensure that both ends of the sample 3 can be supported by the support seat 2 and the end face rests on the end face of the positioning slider. At the same time, the side of the sample 3 also rests on the anvil 1, so that the sample 3 is positioned by three faces, namely the end face, the bottom face and the side face; the safety door of the testing machine is closed, and the safety door limit switch triggers a signal to the PLC controller to open the solenoid valve for reverse air supply, so that the piston rod of the driving cylinder 7 extends out, pushes the positioning slider, and then pushes the sample 3 to the predetermined position of the test, completes the preparatory action before the pendulum falls, starts the drop hammer program, and completes an impact test. The predetermined position of the test is known. By accurately measuring and adjusting the slider 4, the connecting block 5, and the adjustable limit screw 6, it can be ensured that the driving cylinder 7 pushes the sample 3 to the correct position after extending. At the same time, selecting a driving cylinder 7 of a suitable length ensures that after the driving cylinder 7 is retracted, both ends of the sample 3 can also fall on the support seat 2.

[0014] The action direction of the pendulum is perpendicular to the action direction of the Charpy pendulum impact specimen centering device of the present embodiment, and the Charpy pendulum impact specimen centering device of the present embodiment only pushes the specimen in a surface contact manner. Therefore, the pendulum will not affect the Charpy pendulum impact specimen centering device of the present embodiment, thereby achieving the effect of one-time calibration and multiple uses; the work of the operator can be greatly simplified. For each test, it is only necessary to open the safety door, place the specimen with the end faces and side faces against each other, and then close the safety door and start the program to complete the test.

[0015] The present invention is not limited to the above-mentioned embodiments. Any technical solution formed by equivalent replacement falls within the protection scope required by the present invention.

Claims

1. A Charpy pendulum impact specimen centering device, characterized in that: include: A positioning slider, an adjustable limit screw and a driving cylinder are arranged beside a support seat in a Charpy pendulum impact test device; one end of the positioning slider is connected to the piston rod of the driving cylinder through the adjustable limit screw; the positioning slider can move between a first position and a second position under the drive of the driving cylinder; when the positioning slider is located at the first position, the sample is placed on the support seat in the Charpy pendulum impact test device, and one end of the sample is placed against the other end of the positioning slider; when the positioning slider moves from the first position to the second position, the sample can be pushed to move to a predetermined position for the Charpy pendulum impact test.

2. The Charpy pendulum impact specimen centering device according to claim 1, characterized in that: The action of the driving cylinder is linked to the safety door of the Charpy pendulum impact test device. When the safety door is opened, the driving cylinder drives the positioning slider to move to the first position. When the safety door is closed, the driving cylinder drives the positioning slider to move to the second position.

3. The Charpy pendulum impact specimen centering device according to claim 2, characterized in that: The positioning slider comprises a slider and a connecting block which are installed together by bolts. The relative position between the slider and the connecting block can be adjusted by changing the installation position of the bolts.

Images