Testing device for bending strength of metal material

Abstract

The utility model discloses a metal material bending strength testing device which comprises a bottom plate and a supporting frame installed on the bottom plate, the supporting frame comprises a supporting plate on the bottom plate and a top plate installed on the top of the supporting plate, and a first electric push rod is installed on the top plate; a pressure sensor is mounted at the lower end of a first telescopic rod of the first electric push rod; a pair of sample brackets is fixedly mounted on the bottom plate; a sample groove is formed in the bottom plate, a spring is mounted in the sample groove, a limiting clamp is mounted on each of two sides of the sample groove, and each limiting clamp is provided with a clamping plate extending towards the inner side of the sample groove; a sample is placed in the sample groove, and the sample is pushed by the spring to abut against the lower side of the clamping plate; a second electric push rod is installed on the side, away from the supporting frame, of the sample groove, and a second telescopic rod of the second electric push rod can push the sample located on the uppermost side to the sample support. When the sample is detected, the sample is only subjected to the pressure of the first electric push rod, so that the accuracy of detection data is ensured.

Description

Technical Field

[0001] The utility model relates to a testing device for the bending strength of metal materials. Background Art

[0002] In order to improve the efficiency of bending strength testing of metal materials, the patent document "A testing device for bending strength of non-ferrous metal alloy materials" has improved the existing device, using two turntables as support frames for the samples, and using the rotation of the turntables to successively test the samples. During the testing process, it is necessary to use electric push rod two to press the sample tightly against the push plate. During the entire testing process, the sample is always under the squeeze of electric push rod two and the push plate. When electric push rod one presses on the sample, the pressure sensor installed on electric push rod one will detect the pressure on the sample. However, during the test, the squeeze of electric push rod two and the push plate will be superimposed on the sample, increasing the curvature of the sample, making the pressure detected by the pressure sensor low, affecting the accuracy of the test. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a testing device for the bending strength of metal materials, which comprises a bottom plate extending along a first axis direction, a support frame is installed on the bottom plate, the support frame comprises a support plate vertically installed on the bottom plate and a top plate installed on the top of the support plate, a first electric push rod is fixedly installed on the top plate, a first telescopic rod of the first electric push rod extends downward in a vertical direction, and a pressure sensor is installed at the lower end of the first telescopic rod; a pair of sample holders are fixedly installed on the bottom plate, the pair of sample holders are arranged at intervals along a second axis direction, and the pair of sample holders are located directly below the top plate, and the pair of sample holders are used to support samples; the first axis direction and the second axis direction both extend in a horizontal direction and are perpendicular to each other;

[0004] A sample slot for placing a sample is arranged on the bottom plate, and the sample slot is located on one side of the first axis direction of the support frame; a spring is installed in the inner cavity of the sample slot, and a limit card is installed on both sides of the sample slot in the second direction, and the limit card has a card plate extending toward the inner side of the sample slot; a plurality of samples are placed in the sample slot, and the plurality of samples are freely stacked together in the vertical direction, and there is no connection between two adjacent samples. Under the push of the spring, the sample is pressed against the lower side of the card plate; the top surface of the sample slot is at the same height as the top of the sample rack, and the distance between the sample slot and the sample rack is less than 2 mm;

[0005] A second electric push rod is fixedly installed on the side of the sample slot away from the support frame. The second telescopic rod of the second electric push rod can extend toward the sample slot along the first axis direction and push the uppermost sample onto the sample support.

[0006] In the present application, a sample slot is provided between the second electric push rod and the sample holder, and the sample is placed in the sample slot. The spring is in a compressed state, pressing the sample against the lower side of the cardboard. When the sample is subjected to a bending strength test, the second electric push rod is started, and the second telescopic rod pushes the top sample in the sample slot onto the sample holder, retracts the second telescopic rod, and then the first electric push rod is started, and the first telescopic rod extends downward to squeeze the sample, causing the sample to bend, and conduct a bending strength test. During the test, the sample is only subjected to the pressure of the first electric push rod, thereby ensuring the accuracy of the test data. In the present application, since multiple samples can be placed in the sample slot at one time, multiple samples can be tested continuously, thereby improving the test efficiency. After both the first electric push rod and the second electric push rod are connected to the automatic control system, multiple samples can be automatically and continuously tested.

[0007] Furthermore, a protective groove is provided on the bottom plate, the protective groove having an opening facing upward, a cover plate is detachably mounted on the opening, a detection hole is provided on the cover plate, the detection hole is located directly below the pressure sensor, a rangefinder is installed in the protective groove, and the rangefinder can detect the position of the sample through the detection hole.

[0008] This design can provide protection for the rangefinder to prevent the broken sample from falling onto the rangefinder during the test and causing damage to the rangefinder.

[0009] Specifically, each limit card includes a vertical plate extending in the vertical direction and a clamping plate arranged at the top of the vertical plate, and a long slot extending in the vertical direction is provided on the vertical plate, through which a screw is passed to detachably mount the limit card on the outer wall of the sample slot. According to the different thicknesses of the samples, the distance between the clamping plate and the top surface of the sample slot is adjusted to ensure that the lower surface of the uppermost sample can exceed the top surface of the sample slot upwards.

[0010] Specifically, in order to ensure that the sample can be smoothly moved from the sample slot to the sample holder, the distance between the lower surface of the clamping plate and the top surface of the sample slot is 0.5-1mm larger than the thickness of the sample. The thickness of the bending strength sample is 4+0.2mm. This design allows the second electric push rod to push only one sample at a time.

[0011] Furthermore, in order to prevent the spring from scratching the surface of the sample, a pad is installed on the top of the spring.

[0012] Furthermore, in order to stably support the sample, two springs are installed in the inner cavity of the sample slot. The two springs are respectively located on both sides of the second axis direction of the inner cavity of the sample slot, and the two ends of the pad are respectively supported on the top of the two springs.

[0013] Furthermore, a sink is provided on the bottom plate, the sink is formed by the upper surface of the bottom plate being sunken downward in the vertical direction, and the sample slot is inserted into the sink. This design enables the sample slot to be easily removed from the bottom plate and loaded with the sample.

[0014] Furthermore, in order to push the sample smoothly, a push plate is fixedly installed at the end of the second telescopic rod, and the push plate extends along the second axis direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 yes Figure 1 Left view of .

[0017] Figure 3 yes Figure 1 Top view of the .

[0018] Figure 4 yes Figure 1 Center AA view. DETAILED DESCRIPTION

[0019] See also Figure 1-Figure 4 In the accompanying drawings, the direction of the first axis X represents the direction of the first axis, and the direction of the second axis Y represents the direction of the second axis. The first axis direction and the second axis direction both extend in the horizontal direction and are perpendicular to each other.

[0020] A testing device for the bending strength of metal materials includes a bottom plate 10 extending along a first axis, a support frame 20 is installed on the bottom plate, and the support frame 20 includes two support plates 21 vertically installed on the bottom plate and a top plate 22 installed on the top of the support plates, and the two support plates are arranged at intervals along a second axis. An adjusting roller 11 is installed on the lower surface of the bottom plate.

[0021] A first electric push rod 30 is fixedly mounted on the top plate 22, a first cylinder 31 of the first electric push rod 30 is fixedly mounted in a mounting hole 23 in the middle of the top plate, a first telescopic rod 32 of the first electric push rod 30 extends downward in a vertical direction, an extrusion block 33 is fixedly mounted at the lower end of the first telescopic rod 32, and a pressure sensor 34 is fixedly mounted on the lower side of the extrusion block 33. For clear display, Figure 3 In the process, the top plate and the first electric push rod 30 are removed.

[0022] A pair of sample supports 40 are fixedly mounted on the bottom plate 10, the pair of sample supports are spaced apart along the second axis direction, and the pair of sample supports are located directly below the top plate, and the pair of sample supports are used to support the sample 100. In this embodiment, a supporting blade 41 is formed on the top of each sample support, and the supporting blade is in the shape of a wedge protruding upward.

[0023] A sample slot 50 for placing the sample is provided on the bottom plate, and the sample slot is located on one side of the first axis direction of the support frame 20. In this embodiment, the sample slot 50 is a rectangular slot extending along the second axis direction, and two springs 52 extending along the vertical direction are installed in the inner cavity 51 of the sample slot, and the two springs 52 are respectively located on both sides of the second axis direction of the inner cavity of the sample slot. The two ends of the pad 54 are respectively supported on the top of the two springs, and the sample 100 is placed on the pad. In this embodiment, the spring adopts a cylindrical helical compression spring.

[0024] A limit card 53 is installed on both sides of the second direction of the sample slot 50. Each limit card 53 includes a vertical plate 531 extending in the vertical direction and a clamping plate 532 arranged at the top of the vertical plate. The clamping plate extends toward the inner side of the sample slot. In this embodiment, the limit card is made of angle steel. A long slot 533 extending in the vertical direction is opened on the vertical plate. The screw 534 detachably mounts the limit card 53 on the outer wall of the sample slot through the long slot. When it is necessary to adjust the distance between the clamping plate and the top surface 501 of the sample slot, loosen the screw 534, move the limit card, and tighten the screw 534 after adjusting the distance between the clamping plate and the top surface 501 of the sample slot to the right position. A plurality of samples are placed in the sample slot. The plurality of samples are freely stacked together in the vertical direction. There is no connection between two adjacent samples. Under the push of the spring, the sample is pressed against the lower side of the clamping plate.

[0025] In this embodiment, the distance between the lower surface of the card plate and the top surface of the sample slot is 0.8 mm greater than the thickness of the sample. The top surface 501 of the sample slot is at the same height as the top of the sample rack; and the distance between the sample slot and the sample rack is less than 2 mm.

[0026] In this embodiment, a sink 12 is provided on the bottom plate. The sink is formed by the upper surface of the bottom plate being depressed downward in a vertical direction. The sample slot is inserted into the sink.

[0027] A second electric push rod 60 is fixedly mounted on the side of the sample slot 50 away from the support frame. In this embodiment, a boss 13 is fixedly mounted on the bottom plate, and a second cylinder 61 of the second electric push rod 60 is fixedly mounted on the boss 13. A push plate 63 is fixedly mounted on the end of the second telescopic rod 62, and the push plate extends along the second axis. The second telescopic rod 62 of the second electric push rod can extend toward the sample slot along the first axis and push the sample located at the uppermost side onto the sample support.

[0028] A protection groove 15 is provided on the bottom plate, and the protection groove 15 is located below the top plate. The protection groove has an opening facing upward, and a cover plate 16 is detachably mounted on the opening. A detection hole 17 is provided on the cover plate, and the detection hole is located directly below the pressure sensor 34. A rangefinder 18 is installed in the protection groove, and the rangefinder can detect the position of the sample through the detection hole. In this embodiment, the rangefinder specifically adopts a spectroscopic interferometer laser displacement meter.

Claims

1. A testing device for the bending strength of metal materials, characterized in that: The bottom plate includes a bottom plate extending along the first axis direction, a support frame is installed on the bottom plate, and the support frame includes a support frame vertically installed on the bottom plate. A plate and a top plate installed on the top of the support plate, a first electric push rod is fixedly installed on the top plate, a first telescopic rod of the first electric push rod extends downward in a vertical direction, and a pressure sensor is installed at the lower end of the first telescopic rod; a pair of sample brackets are fixedly installed on the bottom plate, the pair of sample brackets are arranged at intervals along the second axis direction, and the pair of sample brackets are located directly below the top plate, and the pair of sample brackets are used to support the sample; the first axis direction and the second axis direction both extend in the horizontal direction and are perpendicular to each other; A sample slot for placing a sample is arranged on the bottom plate, and the sample slot is located on one side of the first axis direction of the support frame; a spring is installed in the inner cavity of the sample slot, and a limit card is installed on both sides of the sample slot in the second direction, and the limit card has a card plate extending toward the inner side of the sample slot; a plurality of samples are placed in the sample slot, and the plurality of samples are freely stacked together in the vertical direction, and there is no connection between two adjacent samples. Under the push of the spring, the sample is pressed against the lower side of the card plate; the top surface of the sample slot is at the same height as the top of the sample rack, and the distance between the sample slot and the sample rack is less than 2 mm; A second electric push rod is fixedly installed on the side of the sample slot away from the support frame. The second telescopic rod of the second electric push rod can extend toward the sample slot along the first axis direction and push the uppermost sample onto the sample support.

2. The test device according to claim 1, characterized in that: A protective groove is provided on the bottom plate, the protective groove has an opening facing upward, a cover plate is detachably mounted on the opening, a detection hole is provided on the cover plate, the detection hole is located directly below the pressure sensor, a rangefinder is installed in the protective groove, and the rangefinder can detect the position of the sample through the detection hole.

3. The test device according to claim 1, characterized in that: Each limit card includes a vertical plate extending in the vertical direction and a clamping plate arranged at the top of the vertical plate. A long slot extending in the vertical direction is opened on the vertical plate, and a screw is used to detachably install the limit card on the outer wall of the sample slot through the long slot.

4. The test device according to claim 1, characterized in that: The distance between the lower surface of the card plate and the top surface of the sample groove is 0.5-1 mm larger than the thickness of the sample.

5. The test device according to claim 1, characterized in that: A backing plate is mounted on top of the spring.

6. The test device according to claim 5, characterized in that: Two springs are installed in the inner cavity of the sample slot. The two springs are respectively located on both sides of the second axis direction of the inner cavity of the sample slot. The two ends of the pad are respectively supported on the tops of the two springs.

7. The test device according to claim 1, characterized in that: A sinking groove is arranged on the bottom plate, and the sinking groove is formed by the upper surface of the bottom plate being depressed downward in the vertical direction, and the sample slot is inserted into the sinking groove.

8. The test device according to claim 1, characterized in that: A push plate is fixedly installed at the end of the second telescopic rod, and the push plate extends along the second axis direction.

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