CN215525335U - Experimental device for be used for measuring tensile test fracture sample length - Google Patents
Experimental device for be used for measuring tensile test fracture sample length Download PDFInfo
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- CN215525335U CN215525335U CN202121760806.2U CN202121760806U CN215525335U CN 215525335 U CN215525335 U CN 215525335U CN 202121760806 U CN202121760806 U CN 202121760806U CN 215525335 U CN215525335 U CN 215525335U
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- 238000009864 tensile test Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 230000005484 gravity Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses an experimental device for measuring the length of a tensile test fracture sample, which comprises a base (1), wherein one end of the base (1) is provided with a baffle plate, a cavity is arranged in the base (1), a fixed positioning device (2) is fixed at one end of the cavity of the base (1), the side wall of the cavity is provided with a sliding key groove (4), the sliding key groove (4) starts from the tail end of the fixed positioning device (2), namely one end far away from the baffle plate, and finally the other end of the cavity of the base (1); the experimental device for measuring the length of the tensile test breaking sample can clamp the breaking sample to be axially spliced; the stretching device has certain elasticity and can adapt to the change of the length of a sample in a stretching experiment; meanwhile, the device is simple and easy to operate, after a sample is clamped, the positioning pointer of the mobile device is directly used for reading, the testing time is shortened, and the experimental efficiency is improved to the maximum extent.
Description
Technical Field
The utility model relates to an experimental device for measuring the length of a breaking sample in a tensile test.
Background
Tensile testing is a routine test of the mechanical properties of steel products, in which elongation after fracture is the most important indicator. The test specimen was placed on a tensile testing machine to test, and the elongation of the test specimen after breaking was measured. The traditional measuring method is to splice two broken parts together, measure the length of the broken part by using a measuring tool, and require the original sample to be in butt joint at the broken position during butt joint, and if no clamping device is used, the round axis degree of the sample for breakage measurement cannot be ensured. The sample needs manual fixed, if the measuring tool touches the sample in the measurement process, the sample position moves, still needs to operate again, especially bar-shaped sample rolls more easily, measures and wastes time and energy, and measuring error is great, influences result and experimental analysis.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an experimental device for measuring the length of a breaking sample in a tensile test aiming at the defects of the prior art.
The utility model adopts the following technical scheme:
an experimental device for measuring the length of a tensile test fracture sample comprises a base 1, wherein one end of the base 1 is a baffle, a cavity is arranged in the base 1, a fixed positioning device 2 is fixed at one end of the cavity of the base 1, the side wall of the cavity is provided with a sliding key groove 4, the sliding key groove 4 starts from the tail end of the fixed positioning device 2, namely one end far away from the baffle, and finally the other end of the cavity of the base 1; the movable positioning device 3 is in sliding fit with the base 1 through the sliding key groove 4; the fixed positioning device 2 is provided with a planar plate-shaped sample object stage 6 and a concave rod-shaped sample object stage 7, and the bottom of the fixed positioning device is provided with a bolt hole for fixing with the base 1; the mobile positioning device 3 is provided with a planar plate-shaped sample object stage 6 and a concave bar-shaped sample object stage 7, sliding keys 8 for sliding are arranged on two sides of the mobile positioning device 3, the sliding keys 8 are matched with the sliding key grooves 4, and the tail end of the mobile positioning device 3 is provided with a baffle plate reading pointer 9.
According to the experimental device, the thicknesses of two side walls of the cavity of the base are different, and a dividing ruler 5 is arranged on one thicker side.
In the experimental device, the width of the plate-shaped sample object stage 6 is more than 25mm so as to meet the standard samples with different sizes.
According to the experimental device, the length of the plate-shaped sample carrying platform 6 is larger than 50mm so as to ensure that a sample can be stably placed on the carrying platform.
The experimental device adopts a bow-shaped groove-shaped rod-shaped sample objective table to place a rod-shaped sample, the diameter of the rod-shaped sample objective table is larger than 20mm, and the chord length of the rod-shaped sample objective table is not larger than 18mm, so that the rod-shaped sample can be stably placed in the experimental device.
According to the experimental device, the arrangement position of the sliding key 8 is required to be arranged above the gravity center, so that the gravity center and the sliding key 8 are located on the same horizontal plane when a sample exists.
In the experimental device, the length of the sliding key 8 should not be less than half of the length of the mobile positioning device 3.
In the experimental device, the sliding key 8 is in transition fit with the key groove in the inner cavity of the base.
In the experimental device, the center of the section of the rod-shaped sample objective table of the mobile positioning device 3 and the center of the rod-shaped sample objective table of the fixed positioning device 2 are coaxial at a higher tolerance level.
The experimental device for measuring the length of the tensile test breaking sample can clamp the breaking sample to be axially spliced; the stretching device has certain elasticity and can adapt to the change of the length of a sample in a stretching experiment; meanwhile, the device is simple and easy to operate, after a sample is clamped, the positioning pointer of the mobile device is directly used for reading, the testing time is shortened, and the experimental efficiency is improved to the maximum extent.
Drawings
FIG. 1 is a sample assembly drawing;
FIG. 2 is a fixed positioning device;
FIG. 3 is a mobile positioning device;
FIG. 4 is a schematic view of a plate-like specimen;
FIG. 5 is a schematic view of a bar sample;
1, a base; 2 fixing the positioning device;
3 moving the positioning device; 4, a sliding key groove;
5, dividing a scale; 6 a plate-like sample stage;
7 a rod-shaped sample stage; 8 a sliding key;
9 baffle reading pointer;
Detailed Description
The present invention will be described in detail with reference to specific examples.
As shown in fig. 1-3, the experimental device for measuring the breaking length of the tensile test of the plate-shaped or bar-shaped tensile test sample comprises a base 1, wherein the leftmost end of the base 1 is a baffle and is internally provided with a cavity, a fixed positioning device 2 is fixed at one end of the cavity of the base 1, the side wall of the cavity is provided with a sliding key slot 4, and the sliding key slot 4 starts from the tail end of the fixed positioning device 2 (i.e. the end far away from the baffle) and ends at the other end of the cavity of the base 1; the movable positioning device 3 is in sliding fit with the base 1 through the sliding key groove 4; the fixed positioning device 2 is provided with a planar plate-shaped sample object stage 6 and a concave rod-shaped sample object stage 7, and the bottom of the fixed positioning device is provided with a bolt hole for fixing with the base 1; the mobile positioning device 3 is provided with a planar plate-shaped sample object stage 6 and a sunken rod-shaped sample object stage 7, sliding keys 8 used for sliding are arranged on two sides of the mobile positioning device 3, the sliding keys 8 are matched with the sliding key grooves 4, a baffle reading pointer 9 is arranged at the tail end (namely, one end far away from a baffle) of the mobile positioning device 3, the thicknesses of two side walls of the base cavity are different, a dividing ruler (5) is arranged on one thicker side of the base cavity, the indication value of the baffle reading pointer 9 on the dividing ruler 5 is the fracture length of the plate-shaped sample tensile test, and the length of two ends of the plate-shaped sample object stage (namely, the length of two times a is subtracted) is required to be subtracted from the rod-shaped sample value.
Example 1:
the design tool is used for measuring the length of a plate-shaped tensile sample in a fracture state, and the size of a standard sample (as shown in figure 4) is as follows: 190mm long, 20mm wide and 0.8mm thick.
The specific operation process is as follows:
1. and (4) adopting a standard sample size to carry out a tensile test on a mechanical experiment stretcher.
2. The fracture butt joint is carried out to the sample that will break, with the great half of rupture length, puts into the one side that this experimental apparatus plate-like sample objective table 6 leaned on the scale, and the edge platform of being convenient for supports.
3. The mobile positioning device 3 moves to the other end of the base, the remaining half of the sample is placed in the mobile positioning device, and the tail of the sample is adjusted by moving the mobile positioning device to be abutted with the fracture, so that the tail of the sample is tightly attached to a baffle reading pointer 9 of the mobile positioning device.
4. The reading is made directly by the baffle reading pointer 9.
Example 2:
the length of the bar-shaped tensile sample in a breaking state is measured, and the standard sample size (shown in figure 5) is as follows: the length is 150mm, and the diameter of the cylinders at the two ends is 20 mm.
1. And (4) adopting a standard sample size to carry out a tensile test on a mechanical experiment stretcher.
2. The rod-shaped breaking sample is subjected to fracture butt joint and marking, a half of the larger fracture length is placed into the rod-shaped sample objective table 7 of the experimental device, and the end face of the baffle plate is tightly attached to the front of the objective table.
3. And moving the positioning device to the other end of the base, placing the rest half of the sample in the positioning device, moving the mobile device to butt the fracture according to the butt fracture mark, and adjusting the tail of the sample to enable the tail of the sample to be tightly attached to the baffle of the mobile device.
4. After clamping, the baffle reading pointer 9 is used for directly reading, and the actual value is subtracted by the length of twice a, so that the experimental real data is obtained.
The utility model designs and provides an experimental device suitable for the tensile test fracture length of a plate-shaped or rod-shaped tensile test sample, and the measurement of the test sample after the tensile test fracture is simplified, the measurement accuracy is ensured, and the measurement efficiency is improved by adopting a mode of tightly extruding the fractured test sample by using a fixed positioning device 2 and a movable positioning device 3.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the utility model as defined in the appended claims.
Claims (9)
1. The experimental device for measuring the length of the tensile test fracture sample is characterized by comprising a base (1), wherein one end of the base (1) is provided with a baffle, a cavity is arranged in the base (1), a fixed positioning device (2) is fixed at one end of the cavity of the base (1), the side wall of the cavity is provided with a sliding key groove (4), the sliding key groove (4) begins from the tail end of the fixed positioning device (2), namely one end far away from the baffle, and finally the other end of the cavity of the base (1); the mobile positioning device (3) is in sliding fit with the base (1) through the sliding key groove (4); the fixed positioning device (2) is provided with a planar plate-shaped sample object stage (6) and a concave rod-shaped sample object stage (7), and the bottom of the fixed positioning device is provided with a bolt hole for fixing with the base (1); the mobile positioning device (3) is provided with a planar plate-shaped sample object stage (6) and a sunken rod-shaped sample object stage (7), sliding keys (8) used for sliding are arranged on two sides of the mobile positioning device (3), the sliding keys (8) are matched with the sliding key grooves (4), and a baffle plate reading pointer (9) is arranged at the tail end of the mobile positioning device (3).
2. Experimental apparatus according to claim 1, characterized in that, the base cavity has two side walls with different thickness, and the thicker side is provided with a graduated scale (5).
3. The laboratory device according to claim 1, characterized in that the plate-like sample stage (6) has a width of more than 25mm in order to meet different standard sample sizes.
4. The testing device according to claim 1, characterized in that the length of the plate-like specimen stage (6) is greater than 50mm to ensure that the specimen can be placed on the stage smoothly.
5. The experimental facility as claimed in claim 1, wherein the rod specimen stage in the shape of bow groove is used for placing the rod specimen, the diameter of the rod specimen stage is more than 20mm, and the chord length of the rod specimen stage is not more than 18mm, so as to ensure that the rod specimen is placed in the test device smoothly.
6. The testing device according to claim 1, wherein the sliding key (8) is arranged above the center of gravity, so as to ensure that the center of gravity and the sliding key (8) are on the same horizontal plane when the test sample is present.
7. Laboratory device according to claim 1, characterized in that the length of the sliding key (8) should not be less than half the length of the mobile positioning means (3).
8. The experimental device as claimed in claim 1, wherein the sliding key (8) is in transition fit with a key groove in the inner cavity of the base.
9. The testing apparatus according to claim 1, wherein the center of the cross section of the rod specimen stage of the mobile positioning device (3) is equal to the center of the rod specimen stage of the fixed positioning device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121760806.2U CN215525335U (en) | 2021-07-30 | 2021-07-30 | Experimental device for be used for measuring tensile test fracture sample length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121760806.2U CN215525335U (en) | 2021-07-30 | 2021-07-30 | Experimental device for be used for measuring tensile test fracture sample length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215525335U true CN215525335U (en) | 2022-01-14 |
Family
ID=79788397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121760806.2U Expired - Fee Related CN215525335U (en) | 2021-07-30 | 2021-07-30 | Experimental device for be used for measuring tensile test fracture sample length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215525335U (en) |
-
2021
- 2021-07-30 CN CN202121760806.2U patent/CN215525335U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |