CN215524548U - Device for auxiliary measurement of broken sample of tensile test - Google Patents
Device for auxiliary measurement of broken sample of tensile test Download PDFInfo
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- CN215524548U CN215524548U CN202121094494.6U CN202121094494U CN215524548U CN 215524548 U CN215524548 U CN 215524548U CN 202121094494 U CN202121094494 U CN 202121094494U CN 215524548 U CN215524548 U CN 215524548U
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Abstract
The utility model discloses a device for assisting in measuring a sample after a tensile test is broken, and belongs to the technical field of mechanical property detection of metal materials. The device comprises a slideway, a normally fixed sliding block, an adjustable sliding block, a sliding block locking bolt, a locking block, a normally fixed thimble and an adjustable thimble. The slide way is used for adjusting the distance between the slide blocks when measuring samples with different lengths; the sliding block is used for limiting the moving range of the thimble; the thimble is used for jacking the tensile sample after the breakage to be detected. The device can accurately measure the post-fracture gauge length and the minimum diameter of the fracture surface of the tensile sample by using the measuring tool under the condition that the sample is not required to be held by hands, is particularly suitable for the condition that the post-fracture sample is not easy to butt under the condition that the sample is held by hands, reduces the measurement error caused by butt joint of different shafts or insufficient tightness of butt joint of the sample in the measurement process, reduces the retest rate of conformance judgment or verification test, and improves the measurement precision and the test efficiency.
Description
The technical field is as follows:
the utility model relates to the technical field of mechanical property detection of metal materials, in particular to a device for assisting in measuring a sample after a tensile test is broken.
Background art:
the tensile property is the basic mechanical property of the material, and the indexes of the material such as tensile strength, yield strength, elongation after fracture, reduction of area and the like can be obtained through a tensile test. The tensile strength and the yield strength are important parameters for representing the strength of the material, the elongation (A) after fracture and the reduction of area (Z) are important parameters for reflecting the plasticity index of the material, and the measurement result has important reference value and application value in engineering and directly influences the quality inspection, research and development, design, material selection, safety evaluation and the like of the metal material.
Post-fracture gauge length and post-fracture minimum cross-sectional area are needed in the calculation of a and Z, respectively. According to GB/T228.1-2010 part 1 of the tensile test of metallic materials: room temperature test method, it can be known that the measurement process of the gauge length of the broken tensile sample is that the broken two parts of samples are tightly butted together at room temperature, the axes of the two parts are ensured to be on the same straight line, and the gauge length of the broken sample is measured; the minimum cross-sectional area after the tensile sample is broken is measured by carefully matching broken parts of the sample together to enable the axes of the broken parts to be on the same straight line, and measuring the minimum diameter of the neck of the round cross-section sample after the breakage, thereby calculating the minimum cross-sectional area after the breakage. It is not difficult to interpret from the standard, and it must be ensured that the fracture is tightly butted and the axes are in the same straight line in the measuring process. Because the measurement of the post-fracture gauge length and the post-fracture minimum cross-sectional area directly influences the accuracy of the post-fracture elongation and reduction of area calculation results.
At present, the measurement of the gauge length of a sample after fracture and the minimum diameter of the sample after fracture is still completed by the handheld operation of an experimenter under the condition of reliable technology, the handheld operation measurement can obviously improve the test efficiency in a large number of stretching processes, and especially under the condition that the fracture after fracture is in a cup cone shape, the connection process of the fracture can be realized under the condition of one hand because the connection process of the stretching fracture is simple, so that the measurement is performed. However, in the actual testing process, the tensile fractures of different materials have different morphologies, in addition to the cup-cone-shaped tensile fractures, in shear, or other irregular shapes, the requirement on the operation skill and the working state of experimenters by utilizing the manual operation under the condition that the tensile fracture is not in the shape of a cup cone is higher, the fracture is difficult to splice in a handheld mode under the common condition, the method is mainly embodied in that the fracture of a sample after being butted can not be ensured to be closely matched and connected on the same axis by one hand, the factors of too loose butt joint operation of the tensile fracture or different axes and the like can cause the deviation of the measurement result, in some conformity judgment tests or verification tests, the fracture has to be repeatedly measured, so that the measurement error is reduced, the retesting rate of the sample after the fracture is improved, thereby affecting the efficiency of the test and increasing the labor cost of the test if two persons cooperate to complete the docking and measuring processes. Although the design of the existing related auxiliary measuring device is brought forward, the operation process is complicated, the time of the whole measuring process is long, and the device can be well applied to scientific research work, but the device cannot meet the requirements of convenience in operation and simplification of the measuring process at the same time, and is not suitable for being popularized to engineering for testing broken samples of large-scale tensile tests. In order to improve the test accuracy and the test efficiency of the elongation after fracture and the reduction of area of the sample after fracture in the material tensile test, an auxiliary device which is simple in operation and rapid in measurement needs to be researched and developed, so that the plasticity characterization index of the material can be tested more conveniently and accurately, and reliable reference is provided for the following industries in the component design and material selection process.
The utility model has the following contents:
the utility model aims to provide a device for assisting in measuring a sample after a tensile test is broken, which can effectively assist a laboratory technician in measuring the sample after the tensile test is broken through the design and improvement of the structure, is suitable for assisting in measuring the gauge length of the metal rod-shaped tensile sample after the tensile test is broken and the minimum cross section diameter after the tensile test is broken, avoids the phenomena of untight butt joint of the section and non-coaxial axis of the section axis in the measuring process, and greatly improves the measuring precision and accuracy of the elongation and the reduction of section of the sample after the tensile test is broken. The auxiliary measuring device also has the characteristics of small volume, convenience in operation, low manufacturing cost and the like.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a device for assisting in measuring a sample after a tensile test is broken comprises a slide way, a slide block locking bolt, a locking block and a thimble; wherein:
a slideway: the slide way is used for adjusting the distance between the slide blocks when samples with different lengths are measured, and a through inverted T-shaped groove is formed in the slide way along the axial direction of the slide way;
a slide block: the sliding block can slide along the groove direction of the slide way; the slide block comprises a normally fixed slide block and an adjustable slide block, rectangular strip-shaped bulges are arranged on the bottom surfaces of the normally fixed slide block and the adjustable slide block and are matched with the upper structure of the inverted T-shaped groove of the slide way, and the locking block is arranged at the lower part of the inverted T-shaped groove (the shape of the locking block is matched with the lower structure of the T-shaped groove) and can slide in the slide way along the direction of the groove; the locking block is provided with internal threads, and the normally fixed sliding block and the adjustable sliding block can be fixed on the slideway through the sliding block locking bolt and the locking block;
thimble: the device is used for jacking the tensile sample to be detected after the fracture; the thimble includes often solid thimble and adjustable thimble, often solid thimble and adjustable thimble set up respectively in often on solid slider and the adjustable slider, often solid thimble sets up with the pointed end of adjustable thimble relatively, and the sample is arranged in and is pushed up tightly between often solid thimble and the adjustable thimble after will tensile test breaks during the measurement.
Often solid slider is fixed in the one end of slide, specifically do: the bottom surface of the normally fixed sliding block is provided with a through hole, and a sliding block locking bolt is inserted into the through hole and screwed into a locking block in the chute groove to realize threaded connection; adjustable slider sets up on the slide, specifically does: the bottom surface of the adjustable sliding block is provided with a through hole, and a sliding block locking bolt is inserted into the through hole and screwed into a locking block in the chute groove to realize threaded connection; the normally fixed sliding block or the adjustable sliding block can be fixed or loosened on the slideway by rotating the sliding block locking bolt clockwise or anticlockwise.
The upper part of the normally fixed sliding block is provided with a through hole, the tip of the normally fixed thimble penetrates through the through hole to form interference fit, and the normally fixed thimble can be replaced according to the shape or size of the clamping end of the tensile sample; the upper part of the adjustable sliding block is provided with a threaded hole, and the tip of the adjustable thimble can be screwed into the threaded hole to be in threaded connection with the adjustable sliding block.
The test sample is a rod-shaped test sample with or without a thimble hole reserved at the end part, and when the thimble hole is reserved at the end part of the test sample, the tips of the normally fixed thimble and the adjustable thimble extend into the thimble hole; when the end part of the sample has no thimble hole, the normally fixed thimble and the adjustable thimble are replaced by a smooth sleeve or a threaded sleeve with corresponding sizes.
After the adjustable sliding block is fixed to the slide way, the adjustable thimble is rotated clockwise or anticlockwise to jack or loosen the spliced sample after being broken.
The axes of the normally fixed thimble and the adjustable thimble are on the same straight line.
And knurling the circumferential surfaces of the end parts of the sliding block locking bolt, the normally fixed thimble and the adjustable thimble.
The utility model has the following advantages and beneficial effects:
1. the auxiliary measuring device reduces the difficulty of handheld operation measurement, ensures that the fracture of the sample is tightly butted after the tensile test is broken and the sample is positioned on the same axis after the test is butted, and improves the accuracy and the effectiveness of measured data.
2. The measurement efficiency can be obviously improved in the process of measuring the samples after the mass tensile test is broken, and the retest rate of the samples is reduced.
3. Extensive applicability is extensive, can bare-handed nimble dismantlement, is applicable to almost all bar-like tensile test and breaks the measurement of back sample, but to the tight device in tensile sample quick replacement top that has different centre gripping forms. The volume is small and exquisite, can place on the test bench, can measure after tensile sample breaks.
4. The utility model has reasonable design, simple manufacture and convenient use, after the fracture sample is installed, the two halves of the fracture sample are positioned on the same axis, the measurement can be carried out only by adjusting the distance between the two halves of the fracture sample and then tightly jacking the two halves of the fracture sample through screwing the adjustable thimble, and the utility model has very high practicability.
Description of the drawings:
fig. 1 is a schematic structural diagram of an apparatus for assisting in measuring a sample after a tensile test is broken according to the present invention.
FIG. 2 is an axial schematic view of the apparatus of the present invention for assisting in measuring a specimen after a tensile test break.
Fig. 3 is a schematic view of a slideway structure in the device for assisting in measuring a sample after a tensile test is broken.
FIG. 4 is a schematic view of a slider structure in the device for assisting in measuring a sample after a tensile test is broken according to the present invention.
Fig. 5 is a schematic view of a rod-shaped tensile specimen with a pinhole at the end to which the present invention is directed.
Wherein: 1-a slideway; 2-normally fixing the sliding block; 3-an adjustable slide block; 4-sliding block locking bolt; 5-a locking block; 6-fixing the thimble; 7-adjustable ejector pins.
The specific implementation mode is as follows:
the present invention is described in detail below with reference to the accompanying drawings.
The utility model is primarily directed to a round bar tensile specimen with pin holes at the ends as shown in fig. 5. As shown in fig. 1-5, the device for auxiliary measurement of a broken sample of a tensile test comprises a slideway 1, a slide block locking bolt 4, a locking block 5 and a thimble; the slideway is used for adjusting the distance between the sliding blocks when measuring samples with different lengths, and the slideway 1 is provided with a through inverted T-shaped groove (figure 3) along the axial direction; the sliding block is used for limiting the moving range of the thimble, and can slide along the groove direction of the slide way (figure 4); the slide block comprises a normally fixed slide block 2 and an adjustable slide block 3, rectangular strip-shaped bulges are arranged on the bottom surfaces of the normally fixed slide block 2 and the adjustable slide block 3 and can slide in the upper structure of the inverted T-shaped groove of the slide way, and the locking block 5 is arranged in the lower space of the inverted T-shaped groove and can slide in the slide way along the direction of the groove; the locking block is provided with internal threads, and the normally fixed sliding block 2 and the adjustable sliding block 3 can be fixed on the slideway 1 through the sliding block locking bolt 4 and the locking block 5; the thimble is used for jacking the tensile sample to be tested after the breakage; the thimble includes often solid thimble 6 and adjustable thimble 7, often solid thimble 6 and adjustable thimble 7 set up respectively on often solid slider 2 and adjustable slider 3, often solid thimble 6 sets up with the pointed end of adjustable thimble 7 relatively, and during the measurement with the tensile test sample after breaking place between often solid thimble 6 and adjustable thimble 7 and push up tightly.
The normally fixed sliding block 2 is fixed at one end of the slideway, a through hole is formed in the bottom surface of the normally fixed sliding block 2, and a sliding block locking bolt 4 is inserted into the through hole and screwed into a locking block 5 in the groove of the slideway; a through hole is formed in the bottom surface of the adjustable sliding block 3, and a sliding block locking bolt 4 is inserted into the through hole and screwed into a locking block 5 in the groove of the slideway; the normally fixed sliding block 2 or the adjustable sliding block 3 can be fixed or loosened on the slideway by rotating the sliding block locking bolt 4 clockwise or anticlockwise.
The upper part of the normally fixed sliding block 2 is provided with a through hole, the tip of the normally fixed thimble 6 penetrates through the through hole to form interference fit, and the normally fixed thimble 6 can be replaced according to the shape or size of the clamping end of the tensile sample; the upper part of the adjustable sliding block 3 is provided with a threaded hole, and the tip of the adjustable thimble 7 can be screwed into the threaded hole to be in threaded connection with the adjustable sliding block 3.
The axes of the normally fixed thimble 6 and the adjustable thimble 7 are on the same straight line, a rod-shaped sample (figure 5) with a thimble hole reserved for the end part of the sample is inserted into the thimble hole, and after the adjustable slide block 3 is fixed to the slide way, the clamping or loosening of the spliced sample after the disconnection is realized by rotating the adjustable thimble 7 clockwise or anticlockwise. When the end part of the sample has no thimble hole, the normally fixed thimble and the adjustable thimble are replaced by a smooth sleeve or a threaded sleeve with corresponding sizes.
And knurling is performed on the circumferential surfaces of the end parts of the sliding block locking bolt 4, the normally fixed thimble 6 and the adjustable thimble 7.
The device for assisting in measuring the broken sample of the tensile test is used as follows:
(1) firstly, an adjustable thimble on an adjustable sliding block is rotated to a half-exposed position.
(2) And loosening a sliding block locking bolt on the adjustable sliding block to enable the sliding block to freely slide on the slideway, sliding the sliding block to a position where the distance between the adjustable thimble and the normally fixed thimble is equivalent to the length of the spliced broken sample, and then locking the adjustable sliding block on the slideway to fix the position of the adjustable sliding block.
(3) And (3) placing the butted broken sample between the two normally fixed thimbles and the adjustable thimbles, and inserting the thimbles into thimble holes at the end parts of the sample.
(4) The butted broken sample is tightly pushed by rotating the adjustable thimble, so that the fracture can be butted tightly and coaxially.
(5) And measuring the broken sample as required.
The manufacturing size of the rod-shaped sample is designed according to GB/T228 and HB5214-1996, the size is changed without limitation, and a jacking device can be designed automatically according to the mode that the end part of the sample has a jacking hole in the actual use process.
Claims (7)
1. The utility model provides a device of supplementary measurement tensile test sample after breaking which characterized in that: the device comprises a slideway (1), a sliding block locking bolt (4), a locking block (5) and a thimble; wherein:
a slideway: the slide way is used for adjusting the distance between the slide blocks when samples with different lengths are measured, and a through inverted T-shaped groove is formed in the slide way (1) along the axial direction of the slide way;
a slide block: the sliding block can slide along the groove direction of the slide way; the sliding block comprises a normally fixed sliding block (2) and an adjustable sliding block (3), rectangular strip-shaped bulges are arranged on the bottom surfaces of the normally fixed sliding block (2) and the adjustable sliding block (3) and are matched with the upper structure of an inverted T-shaped groove of the slide way, and the locking block (5) is arranged at the lower part of the inverted T-shaped groove and can slide in the slide way along the direction of the groove; the locking block is provided with internal threads, and the normally fixed sliding block (2) and the adjustable sliding block (3) can be fixed on the slideway (1) through a sliding block locking bolt (4) and the locking block (5);
thimble: the device is used for jacking the tensile sample to be detected after the fracture; the thimble is including often solid thimble (6) and adjustable thimble (7), often solid thimble (6) and adjustable thimble (7) set up respectively in on often solid slider (2) and adjustable slider (3), often the tip of solid thimble (6) and adjustable thimble (7) sets up relatively, and the test sample is arranged in and is held tightly between often solid thimble (6) and adjustable thimble (7) during the measurement after breaking tensile test.
2. The apparatus for assisting in measuring a tensile test broken specimen according to claim 1, wherein: often solid slider (2) is fixed in the one end of slide, specifically is: a through hole is formed in the bottom surface of the normally fixed sliding block (2), and a sliding block locking bolt (4) is inserted into the through hole and screwed into a locking block (5) in the chute groove to realize threaded connection; adjustable slider (3) set up on the slide, specifically do: a through hole is formed in the bottom surface of the adjustable sliding block (3), and a sliding block locking bolt (4) is inserted into the through hole and screwed into a locking block (5) in the sliding way groove to realize threaded connection; through clockwise or anticlockwise rotation slider locking bolt (4), can fix or loosen often solid slider (2) or adjustable slider (3) on the slide.
3. The apparatus for assisting in measuring a tensile test broken specimen according to claim 2, wherein: the upper part of the normally fixed sliding block (2) is provided with a through hole, the tip of the normally fixed thimble (6) penetrates through the through hole to form interference fit, and the normally fixed thimble (6) can be replaced according to different shapes or sizes of clamping ends of tensile samples; the upper part of the adjustable sliding block (3) is provided with a threaded hole, and the tip of the adjustable thimble (7) can be screwed into the threaded hole to be in threaded connection with the adjustable sliding block (3).
4. The apparatus for assisting in measuring a tensile test broken specimen according to claim 1, wherein: the test sample is a rod-shaped test sample with or without a thimble hole reserved at the end part, and when the thimble hole is reserved at the end part of the test sample, the tips of the normally fixed thimble and the adjustable thimble extend into the thimble hole; when the end part of the sample has no thimble hole, the normally fixed thimble and the adjustable thimble are replaced by a smooth sleeve or a threaded sleeve with corresponding sizes.
5. The apparatus for assisting in measuring a tensile test broken specimen according to claim 4, wherein: after the adjustable sliding block (3) is fixed to the slideway, the clamping or loosening of the spliced sample after the fracture is realized by clockwise or anticlockwise rotating the adjustable thimble (7).
6. The apparatus for assisting in measuring a tensile test broken specimen according to claim 1, wherein: the axes of the normally fixed thimble (6) and the adjustable thimble (7) are on the same straight line.
7. The apparatus for assisting in measuring a tensile test broken specimen according to claim 1, wherein: and the circumferential surfaces of the end parts of the sliding block locking bolt (4), the normally fixed thimble (6) and the adjustable thimble (7) are all subjected to knurling treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121094494.6U CN215524548U (en) | 2021-05-21 | 2021-05-21 | Device for auxiliary measurement of broken sample of tensile test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121094494.6U CN215524548U (en) | 2021-05-21 | 2021-05-21 | Device for auxiliary measurement of broken sample of tensile test |
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| Publication Number | Publication Date |
|---|---|
| CN215524548U true CN215524548U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121094494.6U Active CN215524548U (en) | 2021-05-21 | 2021-05-21 | Device for auxiliary measurement of broken sample of tensile test |
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| CN (1) | CN215524548U (en) |
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2021
- 2021-05-21 CN CN202121094494.6U patent/CN215524548U/en active Active
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