CN111504772A - Clamping and vertical centering device for tensile test sample and vertical centering method thereof - Google Patents
Clamping and vertical centering device for tensile test sample and vertical centering method thereof Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention provides a tensile test sample clamping vertical centering device applied to the technical field of material mechanical property tests, and also relates to a tensile test sample clamping vertical centering method, wherein a lower fixed base baffle (4) and a lower fixed base positioning block (5) are arranged on a lower fixed base (3) of a lower vertical centering component (1) of the tensile test sample clamping vertical centering device, a lower central positioning support (6) is movably arranged on the lower fixed base (3), an upper fixed base baffle (10) and an upper fixed base positioning block (11) are arranged on an upper fixed base (9) of an upper vertical centering component (2), an upper central positioning support (12) is movably arranged on an upper fixed base (9), and the tensile test sample clamping vertical centering device and the vertical centering method thereof are placed in a vertical centering state at the initial test, the test result error caused by the fact that the test sample is not vertically centered is avoided, and the test result accuracy is improved.
Description
Technical Field
The invention belongs to the technical field of material mechanical property tests, and particularly relates to a clamping and vertical centering device for a tensile test sample and a clamping and vertical centering method for the tensile test sample.
Background
The tensile test of the material is the most basic test in the mechanical property test of the material and is also the test method which is most widely applied. The tensile test of the material has important application value and reference value in the aspects of development of new materials, purchase and acceptance of the materials, product quality control, safety evaluation of equipment and the like, and the result of the tensile test can be even directly used as the standard of judgment in certain occasions.
At present, most tensile test machine uses tensile anchor clamps for wedge type anchor clamps, when carrying out tensile test to circular cross section tensile sample, adopts dedicated V type clamp splice, can guarantee that tensile sample's clamping end just in time blocks in the V type recess of V type clamp splice, ensures that circular cross section tensile sample's axis and the coincidence of tensile test machine force action line, guarantees that circular cross section tensile sample keeps being in vertical stretching state all the time, prevents that biasing stress from producing. However, when tensile test is performed on tensile test samples such as rectangular cross section samples and longitudinal arc samples, the flat clamping blocks are adopted, the flat clamping blocks cannot vertically adjust the rectangular cross section samples, and when the samples are clamped, operators need to manually operate and place the samples, so that the central axes of the tensile test samples such as the rectangular cross section samples and the longitudinal arc samples are enabled to coincide with the action line of the tensile test machine, and the tensile test samples such as the rectangular cross section samples and the longitudinal arc samples are enabled to be always in a vertical tensile state and in a vertical centering state. The requirement on operators is high, and the operators are required to have abundant experimental experiences and operate by experience and feeling. The tensile samples such as the rectangular cross section sample, the longitudinal arc sample and the like can be easily placed and inclined through manual operation and placement. Or the central axis of the tensile test samples such as the rectangular cross section test sample and the longitudinal arc test sample cannot coincide with the action line of the tensile test machine force, and the centering of the test samples is not realized. These errors all result in inaccurate test results. The effect and deviation on the brittle material are larger. When tensile samples such as rectangular cross section samples, longitudinal arc samples and the like are obliquely placed or cannot be centered, the tensile samples are subjected to eccentric force, additional bending stress is generated on the samples, the samples are subjected to component force action in the horizontal direction, the measured value of the test force is smaller than the actual value, finally, the measured material strength is smaller, and the included angle is larger, the distance between the central axis of the samples and the action line of the tensile testing machine is farther, and the deviation is larger.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the device is low in manufacturing cost, simple structure, convenient operation, maintenance and maintenance are also simple and convenient, can realize the perpendicular centering of tensile test sample (tensile sample) fast and accurately, and be effectively applicable to rectangular cross section sample, tensile samples such as vertical arc sample are just placed into perpendicular centering state at experimental initial time, avoid the sample not perpendicular centering to place and lead to the test result error, improve the tensile test result accuracy.
To solve the technical problems, the invention adopts the technical scheme that:
the invention relates to a tensile test sample clamping vertical centering device, which comprises a lower vertical centering component and an upper vertical centering component, wherein the lower vertical centering component comprises a lower fixed base, a lower fixed base baffle and a lower fixed base positioning block are arranged on the lower fixed base, a lower central positioning support is movably arranged on the lower fixed base, a lower vertical positioning support is movably arranged on the lower central positioning support, a lower vertical positioning plate is arranged on the lower vertical positioning support, the upper vertical centering component comprises an upper fixed base, an upper fixed base baffle and an upper fixed base positioning block are arranged on the upper fixed base, an upper central positioning support is movably arranged on the upper fixed base, an upper vertical positioning support is movably arranged on the upper central positioning support, and an upper vertical positioning plate is arranged on the upper vertical positioning support.
The upper part of the lower fixing base is provided with lower fixing base main scale graduation lines, the lower part of the lower central positioning support is provided with lower central positioning support vernier graduation lines, and the upper part of the lower central positioning support is provided with lower central positioning support main scale graduation lines; the upper part of the upper fixing base is provided with an upper fixing base main scale mark, the upper part of the upper center positioning support is provided with an upper center positioning support vernier scale mark, and the lower part of the upper center positioning support is provided with an upper center positioning support main scale mark.
The lower fixing base, the lower fixing base baffle and the lower fixing base positioning block are arranged to be of T-shaped structures, and the upper fixing base, the upper fixing base baffle and the upper fixing base positioning block 11 are arranged to be of T-shaped structures.
The lower fixing base is provided with a plurality of lower fixing base magnetization knobs, and the upper fixing base is provided with a plurality of upper fixing base magnetization knobs.
The lower vertical positioning plate and the lower vertical positioning support are connected through a lower vertical plate positioning knob, the lower vertical positioning plate and the lower fixing base are vertically arranged, the upper vertical positioning plate and the upper vertical positioning support are connected through an upper vertical plate positioning knob, and the upper vertical positioning plate and the upper fixing base are vertically arranged.
The lower center positioning support is provided with a lower center positioning support positioning block, the lower center positioning support and the lower center positioning support positioning block are arranged to be L-type structures, the upper center positioning support is provided with an upper center positioning support positioning block, and the upper center positioning support positioning block are arranged to be L-type structures.
The upper part of the lower fixed base is provided with a lower fixed base sliding groove, the lower part of the lower central positioning support is provided with a lower central positioning support sliding block, the lower part of the lower central positioning support is provided with a lower central positioning support sliding groove, and the lower part of the lower vertical positioning support is provided with a lower vertical positioning support sliding block; the lower part of the upper fixed base is provided with an upper fixed base sliding groove, the upper part of the upper central positioning support is provided with an upper central positioning support sliding block, the upper part of the upper central positioning support is provided with an upper central positioning support sliding groove, and the upper part of the upper vertical positioning support is provided with an upper vertical positioning support sliding block.
The invention also relates to a clamping and vertical centering method for the tensile test sample, which can quickly and accurately realize vertical centering of the tensile test sample (tensile sample), is effectively suitable for placing the tensile test samples such as a rectangular cross section sample, a longitudinal arc sample and the like into a vertical centering state at the initial test, avoids the error of the test result caused by the fact that the test samples are not placed in the vertical centering state, and improves the accuracy of the tensile test result, wherein the centering method comprises the following steps:
1) measuring the distance from the front face of a lower cross beam of the tensile testing machine to the plane of the central axis of the lower clamping block by using a vernier caliper, setting the distance to be Amm, and fixing the lower center positioning support at Amm on the lower fixing base; fixing the lower vertical middle part at the position above the lower cross beam; measuring the width dimension of the tensile sample by using a vernier caliper, setting the width dimension as Xmm, and fixing the lower vertical positioning support at the position of X/2mm on the lower central positioning support; adjusting the lower vertical positioning plate to be in a horizontal state;
2) measuring the distance from the front face of an upper cross beam of the tensile testing machine to the plane of the central axis of the upper clamping block by using a vernier caliper, setting the distance as Bmm, and fixing the upper center positioning support at Bmm on the upper fixing base; fixing the upper vertical centering component at the position below the upper cross beam; measuring the width dimension of the tensile sample by using a vernier caliper, setting the width dimension as Xmm, and fixing an upper vertical positioning support at a position of X/2mm on an upper central positioning support; adjusting the upper vertical positioning plate to be in a horizontal state;
3) adjusting the position of the tensile sample, respectively attaching the side surfaces of the tensile sample to the lower vertical positioning plate and the upper vertical positioning plate, and controlling an upper clamping block and a lower clamping block of the clamping testing machine to clamp the tensile sample;
4) and (3) finishing vertical centering of the tensile sample, adjusting the lower vertical positioning plate to be in a vertical state, adjusting the upper vertical positioning plate to be in a vertical state, and performing a tensile test.
Setting Amm, placing the lower vertical centering component on the horizontal desktop, pushing the lower central positioning support to slide, aligning the zero scale mark of the vernier scale mark of the lower central positioning support with the position of Amm on the scale mark of the main scale of the lower fixed base, screwing the brake screw of the lower central positioning support, and fixing the lower central positioning support at Amm on the lower fixed base; the lower vertical centering component is placed above a lower cross beam of the tensile testing machine, the lower fixing base is made to be tightly attached to the upper surface of the lower cross beam, the lower fixing base baffle is made to be attached to the front surface of the lower cross beam, meanwhile, the lower fixing base is made to be perpendicular to the plane where the front surface of the lower cross beam is located and parallel to the lower clamping block, the lower fixing base magnetization knob is rotated, and the lower vertical centering component is fixed above the lower cross beam.
Setting Bmm, placing the upper vertical centering component on a horizontal desktop, pushing the upper center positioning support to align the zero scale mark of the vernier scale mark of the upper center positioning support with the position of Bmm on the scale mark of the main scale of the upper fixing base, screwing the brake screw of the upper center positioning support, and fixing the upper center positioning support on the Bmm position of the upper fixing base; and placing the upper vertical centering component below the upper cross beam, enabling the upper fixing base to be tightly attached to the lower surface of the upper cross beam of the tensile testing machine, enabling the baffle plate of the upper fixing base to be attached to the front surface of the upper cross beam, enabling the upper fixing base to be perpendicular to the plane where the front surface of the upper cross beam is located and parallel to the upper clamping block, rotating the magnetization knob of the upper fixing base, and fixing the upper vertical centering component below the upper cross beam.
By adopting the technical scheme of the invention, the following beneficial effects can be obtained:
according to the clamping vertical centering device and the clamping vertical centering method for the tensile test sample, when the tensile test sample needs to be vertically centered, the clamping vertical centering device for the tensile test sample is matched with a tensile testing machine, so that the vertical centering of the tensile test sample can be quickly and accurately realized, and the reliable performance of a subsequent tensile test is ensured. More importantly, the method can be effectively applied to tensile samples with the shapes of rectangular cross section samples, longitudinal arc samples and the like. The vertical centering (vertical centering) method comprises the following steps: measuring the distance from the front face of a lower cross beam of the tensile testing machine to the plane of the central axis of the lower clamping block by using a vernier caliper, setting the distance to be Amm, and fixing the lower center positioning support at Amm on the lower fixing base; fixing the lower vertical middle part at the position above the lower cross beam; measuring the width dimension of the tensile sample by using a vernier caliper, setting the width dimension as Xmm, and fixing the lower vertical positioning support at the position of X/2mm on the lower central positioning support; adjusting the lower vertical positioning plate to be in a horizontal state; measuring the distance from the front face of an upper cross beam of the tensile testing machine to the plane of the central axis of the upper clamping block by using a vernier caliper, setting the distance as Bmm, and fixing the upper center positioning support at Bmm on the upper fixing base; fixing the upper vertical centering component at the position below the upper cross beam; measuring the width dimension of the tensile sample by using a vernier caliper, setting the width dimension as Xmm, and fixing an upper vertical positioning support at a position of X/2mm on an upper central positioning support; adjusting the upper vertical positioning plate to be in a horizontal state; adjusting the position of the tensile sample, respectively attaching the side surfaces of the tensile sample to the lower vertical positioning plate and the upper vertical positioning plate, and controlling an upper clamping block and a lower clamping block of the clamping testing machine to clamp the tensile sample; and (3) finishing vertical centering of the tensile sample, adjusting the lower vertical positioning plate to be in a vertical state, adjusting the upper vertical positioning plate to be in a vertical state, and performing a tensile test. The clamping vertical centering device for the tensile test sample and the vertical centering method thereof have the advantages of low manufacturing cost, simple structure, convenience in operation and simplicity and convenience in maintenance, can quickly and accurately realize vertical centering of the tensile test sample (tensile sample) during tensile test, are effectively suitable for tensile samples such as rectangular cross section samples and longitudinal arc samples, are placed in a vertical centering state at the initial test, avoid errors of test results caused by the fact that the sample is not vertically centered, and improve the accuracy of the tensile test results.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a structural schematic diagram showing a front arrangement state of a lower vertical centering component and an upper vertical centering component of a tensile test specimen clamping vertical centering device according to the invention;
FIG. 2 is a structural schematic diagram of an arrangement state of a lower vertical centering component and an upper vertical centering component of the tensile test specimen clamping vertical centering device according to the invention;
FIG. 3 is a schematic structural diagram showing a side view arrangement state of a lower vertical centering component and an upper vertical centering component of the tensile test specimen clamping vertical centering device according to the present invention;
FIG. 4 is a schematic view of a partial structure of a vertical positioning support and a vertical positioning plate of the device for clamping and centering a tensile test specimen according to the present invention;
FIG. 5 is a schematic view of a partial structure of the tensile test specimen clamping vertical centering device according to the present invention when an upper vertical positioning support and an upper vertical positioning plate are connected;
FIG. 6 is a schematic structural view of the device for clamping and vertically centering a tensile test specimen according to the present invention, when the device is used in cooperation with a tensile testing machine to vertically center the tensile test specimen;
in the drawings, the reference numbers are respectively: 1. a lower vertical centering component; 2. an upper vertical centering component; 3. a lower fixed base; 4. a lower fixed base baffle; 5. a lower fixed base positioning block; 6. a lower central positioning support; 7. a lower vertical positioning support; 8. a lower vertical positioning plate; 9. an upper fixed base; 10. an upper fixed base baffle; 11. an upper fixed base positioning block; 12. an upper central positioning support; 13. an upper vertical positioning support; 14. an upper vertical positioning plate; 15. lower fixed base main scale graduation lines; 16. the vernier scale lines of the lower center positioning support; 17. lower center positioning support main scale graduation line; 18. the scale marks of the main scale of the upper fixed base; 19. the vernier scale lines of the upper center positioning support; 20. the main scale graduation line of the upper center positioning support; 21. a lower fixed base magnetization knob; 22. magnetizing knob of the upper fixed base; 23. a lower vertical plate positioning knob; 24. an upper vertical plate positioning knob; 25. a lower central positioning support positioning block; 26. a positioning block of the upper central positioning support; 27. a lower fixed base chute; 28. a lower central positioning support slider; 29. a lower central positioning support sliding chute; 30. a lower vertical positioning support sliding block; 31. an upper fixed base chute; 32. an upper central positioning support sliding block; 33. an upper central positioning support chute; 34. an upper vertical positioning support sliding block; 36. a lower cross beam; 37. a lower clamping block; 38. stretching a sample; 39. an upper cross beam; 40. an upper clamping block; 41. a lower central positioning support brake screw; 42. a brake screw of the upper center positioning support; 43. the vernier scale lines of the lower vertical positioning support; 44. the vernier scale lines of the upper vertical positioning support are marked; 45. vertically positioning a support braking screw; 46. a support braking screw is vertically positioned; 47. a lower vertical positioning plate screw; 48. and a screw rod is arranged on the vertical positioning plate.
Detailed Description
The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:
as shown in fig. 1-5, the invention relates to a clamping vertical centering device for a tensile test sample, which comprises a lower vertical centering component 1 and an upper vertical centering component 2, the lower vertical middle part 1 comprises a lower fixed base 3, a lower fixed base baffle 4 and a lower fixed base positioning block 5 are arranged on the lower fixed base 3, a lower central positioning support 6 is movably arranged on the lower fixed base 3, a lower vertical positioning support 7 is movably arranged on the lower central positioning support 6, a lower vertical positioning plate 8 is arranged on the lower vertical positioning support 7, the upper vertical centering component 2 comprises an upper fixed base 9, an upper fixed base baffle 10 and an upper fixed base positioning block 11 are arranged on the upper fixed base 9, an upper central positioning support 12 is movably mounted on the upper fixed base 9, an upper vertical positioning support 13 is movably mounted on the upper central positioning support 12, and an upper vertical positioning plate 14 is arranged on the upper vertical positioning support 13. Above-mentioned structure when the vertical centering of tensile sample needs to carry out, through the perpendicular centering device of tensile test sample centre gripping and the cooperation of tensile test machine, can accurately realize the vertical centering of tensile sample fast, ensures that follow-up tensile test reliably goes on. More importantly, the method can be effectively applied to tensile samples with the shapes of rectangular cross section samples, longitudinal arc samples and the like. The vertical centering (vertical centering) method comprises the following steps: measuring the distance from the front surface of the lower cross beam 36 of the tensile testing machine to the plane where the central axis of the lower clamping block 37 is located by using a vernier caliper, setting the distance as Amm, and fixing the lower center positioning support 6 on the Amm position on the lower fixing base 3; fixing the lower vertical centering component 1 in a position above the lower cross beam 36; measuring the width dimension of the tensile sample 38 by using a vernier caliper, setting the width dimension as Xmm, and fixing the lower vertical positioning support 7 at the X/2mm position on the lower central positioning support 6; adjusting the lower vertical positioning plate 8 to be in a horizontal state; measuring the distance from the front surface of an upper cross beam 39 of the tensile testing machine to the plane of the central axis of the upper clamping block 40 by using a vernier caliper, setting the distance to be Bmm, and fixing the upper center positioning support 12 on the Bmm position of the upper fixing base 9; fixing the upper vertical centering component 2 in a position below the upper cross beam 39; measuring the width dimension of the tensile sample 38 by using a vernier caliper, setting the width dimension as Xmm, and fixing the upper vertical positioning support 13 on the upper central positioning support 12 at the position of X/2 mm; the upper vertical positioning plate 14 is adjusted to be in a horizontal state; adjusting the position of the tensile sample 38, respectively attaching the side surfaces of the tensile sample 38 to the lower vertical positioning plate 8 and the upper vertical positioning plate 14, and controlling an upper clamping block 37 and a lower clamping block 40 of the clamping testing machine to clamp the tensile sample 38; after the vertical centering of the tensile specimen 38 is completed, the lower vertical positioning plate 8 is adjusted to be vertical, and the upper vertical positioning plate 14 is adjusted to be vertical, and a tensile test is performed. The device and the method for clamping and vertically centering the tensile test sample have the advantages of low manufacturing cost, simple structure, convenient operation, and simple and convenient maintenance, can quickly and accurately realize the vertical centering of the tensile test sample (tensile sample) before the tensile sample test is carried out, are effectively suitable for the tensile samples such as rectangular cross section samples, longitudinal arc samples and the like, are placed in a vertical centering state at the initial test, avoid the error of the test result caused by the fact that the sample is not vertically centered, and improve the accuracy of the tensile test result.
The upper part of the lower fixing base 3 is provided with lower fixing base main scale graduation lines 15, the lower part of the lower center positioning support 6 is provided with lower center positioning support vernier graduation lines 16, and the upper part of the lower center positioning support 6 is provided with lower center positioning support main scale graduation lines 17; the upper part of the upper fixed base 9 is provided with an upper fixed base main scale mark 18, the upper part of the upper center positioning support 12 is provided with an upper center positioning support vernier scale mark 19, and the lower part of the upper center positioning support 12 is provided with an upper center positioning support main scale mark 20. Above-mentioned structure, the relative position of the lower unable adjustment base 3 of being convenient for, lower central location support 6, lower vertical location support 7 is adjusted as required accurately to the setting of each scale mark, and the relative position of the last unable adjustment base 9 of being convenient for, going up central location support 12, going up vertical location support 13 is adjusted as required to the vertical centering of tensile sample is accomplished to high efficiency accuracy.
The lower fixing base 3, the lower fixing base baffle 4 and the lower fixing base positioning block 5 are arranged to be of T-shaped structures, and the upper fixing base 9, the upper fixing base baffle 10 and the upper fixing base positioning block 11 are arranged to be of T-shaped structures. By the structure, when the vertical centering device is convenient to use, the lower fixing base baffle 4 is reliably attached and matched with the front surface of the lower cross beam of the tensile testing machine, and the lower fixing base positioning block 10 can reliably limit the position of one side of the upper central positioning support 12. Meanwhile, when the vertical centering device is used conveniently, the upper fixing base baffle 10 is conveniently and reliably attached to the front face of an upper cross beam of a tensile testing machine, and the upper fixing base positioning block 11 can reliably limit the position of one side of the upper central positioning support 12.
The lower fixing base 3 is provided with a plurality of lower fixing base magnetization knobs 21, and the upper fixing base 9 is provided with a plurality of upper fixing base magnetization knobs 22. According to the structure, the lower fixing base knob is rotated, the magnetic pole direction of the powerful magnet can be adjusted to face the bottom surface of the lower fixing base, so that the bottom surface of the lower fixing base is magnetized, and the lower vertical centering component is reliably fixed above the lower cross beam of the tensile testing machine through the lower fixing base. The knob of the upper fixing base is rotated, the magnetic pole direction of the powerful magnet can be adjusted to face the bottom surface of the upper fixing base, so that the bottom surface of the upper fixing base is magnetized, and the upper vertical centering component is reliably fixed below an upper cross beam of the tensile testing machine through the upper fixing base. Thus, the vertical centering adjustment of the tensile sample is convenient to carry out subsequently.
The lower vertical positioning plate 8 and the lower vertical positioning support 7 are connected through a lower vertical plate positioning knob 23, the lower vertical positioning plate 8 and the lower fixing base 3 are vertically arranged, the upper vertical positioning plate 14 and the upper vertical positioning support 13 are connected through an upper vertical plate positioning knob 24, and the upper vertical positioning plate 14 and the upper fixing base 9 are vertically arranged. With the structure, the upper vertical positioning plate 14 can limit the sample, and the positioning is realized through the upper vertical plate positioning knob 24.
Lower center positioning support 6 on set up center positioning support locating piece 25 down, center positioning support 6 and center positioning support locating piece 25 set up to be L type structure down, last center positioning support 12 on set up center positioning support locating piece 26, go up center positioning support 12 and go up center positioning support locating piece 26 and set up to be L type structure.
The upper part of the lower fixed base 3 is provided with a lower fixed base sliding chute 27, the lower part of the lower central positioning support 6 is provided with a lower central positioning support sliding block 28, the lower part of the lower central positioning support 6 is provided with a lower central positioning support sliding chute 29, and the lower part of the lower vertical positioning support 7 is provided with a lower vertical positioning support sliding block 30; an upper fixed base sliding groove 31 is arranged at the lower part of the upper fixed base 9, an upper central positioning support sliding block 32 is arranged at the upper part of the upper central positioning support 12, an upper central positioning support sliding groove 33 is arranged at the upper part of the upper central positioning support 12, and an upper vertical positioning support sliding block 34 is arranged at the upper part of the upper vertical positioning support 13. In the above configuration, the lower center positioning holder 6 is slidable with respect to the lower fixed base 3, and the lower vertical positioning holder 7 is slidable with respect to the lower center positioning holder 6. While the upper centering support 12 can slide with respect to the upper fixed base 9, the upper vertical positioning support 13 can slide with respect to the upper centering support 12. In this way, device position adjustment is achieved. So that the lower vertical centering component 1 and the upper vertical centering component 2 are vertically centered from the upper and lower positions.
As shown in fig. 6, the present invention further relates to a method for clamping and vertically centering tensile test samples, which can quickly and accurately achieve vertical centering of tensile test samples, is effectively suitable for placing tensile test samples such as rectangular cross section samples and longitudinal arc-shaped samples in a vertically centered state at the initial stage of a test, avoids errors in test results caused by the fact that the samples are not vertically centered, and improves accuracy of the tensile test results, wherein the method for vertically centering (vertical centering) comprises:
1) measuring the distance from the front surface of the lower cross beam 36 of the tensile testing machine to the plane where the central axis of the lower clamping block 37 is located by using a vernier caliper, setting the distance as Amm, and fixing the lower center positioning support 6 on the Amm position on the lower fixing base 3; fixing the lower vertical centering component 1 in a position above the lower cross beam 36; measuring the width dimension of the tensile sample 38 by using a vernier caliper, setting the width dimension as Xmm, and fixing the lower vertical positioning support 7 at the X/2mm position on the lower central positioning support 6; adjusting the lower vertical positioning plate 8 to be in a horizontal state; 2) measuring the distance from the front surface of an upper cross beam 39 of the tensile testing machine to the plane of the central axis of the upper clamping block 40 by using a vernier caliper, setting the distance to be Bmm, and fixing the upper center positioning support 12 on the Bmm position of the upper fixing base 9; fixing the upper vertical centering component 2 in a position below the upper cross beam 39; measuring the width dimension of the tensile sample 38 by using a vernier caliper, setting the width dimension as Xmm, and fixing the upper vertical positioning support 13 on the upper central positioning support 12 at the position of X/2 mm; the upper vertical positioning plate 14 is adjusted to be in a horizontal state; 3) adjusting the position of the tensile sample 38, respectively attaching the side surfaces of the tensile sample 38 to the lower vertical positioning plate 8 and the upper vertical positioning plate 14, and controlling an upper clamping block 37 and a lower clamping block 40 of the clamping testing machine to clamp the tensile sample 38; 4) after the vertical centering of the tensile specimen 38 is completed, the lower vertical positioning plate 8 is adjusted to be vertical, and the upper vertical positioning plate 14 is adjusted to be vertical, and a specimen tensile test is performed.
After Amm is set, the lower vertical centering component 1 is placed on a horizontal desktop, the lower central positioning support 6 is pushed to slide, the zero scale mark of the vernier scale mark 16 of the lower central positioning support is aligned with the position Amm of the scale mark 17 of the main scale of the lower fixed base, the lower central positioning support brake screw 41 is screwed, and the lower central positioning support 6 is fixed at the position Amm on the lower fixed base 3; the lower vertical centering component 1 is placed above a lower cross beam 36 of a tensile testing machine, a lower fixing base 3 is attached to the upper surface of the lower cross beam 36, a lower fixing base baffle 4 is attached to the front surface of the lower cross beam 36, the lower fixing base 3 is perpendicular to the plane where the front surface of the lower cross beam 36 is located and parallel to a lower clamping block 37, and the lower fixing base magnetization knob 22 is rotated to fix the lower vertical centering component 1 above the lower cross beam 36. In the above steps, when the lower vertical centering component 1 is fixed, the magnetization knob 22 of the lower fixing base is rotated to magnetize the bottom surface of the lower fixing base 3, so that the lower vertical centering device 1 is fixed on the lower cross beam, and can be used in cooperation with the upper vertical centering component 2 to complete the clamping vertical centering setting of the tensile test sample of the sample, thereby facilitating the tensile test of the sample. And reversely rotating the magnetization knob 22 of the lower fixing base to eliminate the bottom magnetization of the lower fixing base 3.
After Bmm is set, the upper vertical centering component 2 is placed on a horizontal desktop, the upper center positioning support 12 is pushed, the zero graduation line of the vernier graduation line 19 of the upper center positioning support is aligned with the position Bmm on the graduation line 20 of the main scale of the upper fixing base, the upper center positioning support brake screw 42 is screwed, and the upper center positioning support 12 is fixed on the position Bmm on the upper fixing base 9; the upper vertical centering component 2 is placed below the upper cross beam 39, the upper fixing base 9 is tightly attached to the lower surface of the upper cross beam 39 of the tensile testing machine, the upper fixing base baffle plate 10 is attached to the front surface of the upper cross beam 39, meanwhile, the upper fixing base 9 is perpendicular to the plane where the front surface of the upper cross beam 39 is located and is parallel to the upper clamping block 40, the upper fixing base magnetization knob 23 is rotated, and the upper vertical centering component 2 is fixed below the upper cross beam 39. In the above steps, when the upper vertical centering component 2 is fixed, the magnetization knob 23 of the upper fixing base is rotated to magnetize the bottom surface of the upper fixing base 9, so that the upper vertical centering device 2 is fixed on the upper cross beam, and can be used in cooperation with the lower vertical centering component 1 to complete the clamping vertical centering setting of the tensile test sample of the sample, thereby facilitating the tensile test of the sample. And reversely rotating the magnetization knob 23 of the upper fixing base to eliminate the magnetization of the bottom surface of the upper fixing base 9.
According to the clamping vertical centering device and the clamping vertical centering method for the tensile test sample, when the tensile test sample needs to be vertically centered, the clamping vertical centering device for the tensile test sample is matched with a tensile testing machine, so that the vertical centering of the tensile test sample can be quickly and accurately realized, and the reliable performance of a subsequent tensile test is ensured. More importantly, the method can be effectively applied to tensile samples with the shapes of rectangular cross section samples, longitudinal arc samples and the like. The vertical centering (vertical centering) method comprises the following steps: measuring the distance from the front face of a lower cross beam of the tensile testing machine to the plane of the central axis of the lower clamping block by using a vernier caliper, setting the distance to be Amm, and fixing the lower center positioning support at Amm on the lower fixing base; fixing the lower vertical middle part at the position above the lower cross beam; measuring the width dimension of the tensile sample by using a vernier caliper, setting the width dimension as Xmm, and fixing the lower vertical positioning support at the position of X/2mm on the lower central positioning support; adjusting the lower vertical positioning plate to be in a horizontal state; measuring the distance from the front face of an upper cross beam of the tensile testing machine to the plane of the central axis of the upper clamping block by using a vernier caliper, setting the distance as Bmm, and fixing the upper center positioning support at Bmm on the upper fixing base; fixing the upper vertical centering component at the position below the upper cross beam; measuring the width dimension of the tensile sample by using a vernier caliper, setting the width dimension as Xmm, and fixing an upper vertical positioning support at a position of X/2mm on an upper central positioning support; adjusting the upper vertical positioning plate to be in a horizontal state; adjusting the position of the tensile sample, respectively attaching the side surfaces of the tensile sample to the lower vertical positioning plate and the upper vertical positioning plate, and controlling an upper clamping block and a lower clamping block of the clamping testing machine to clamp the tensile sample; and (3) finishing vertical centering of the tensile sample, adjusting the lower vertical positioning plate to be in a vertical state, adjusting the upper vertical positioning plate to be in a vertical state, and performing a tensile test. The clamping vertical centering device for the tensile test sample and the vertical centering method thereof have the advantages of low manufacturing cost, simple structure, convenience in operation and simplicity and convenience in maintenance, can quickly and accurately realize vertical centering of the tensile test sample (tensile sample) during tensile test, are effectively suitable for tensile samples such as rectangular cross section samples and longitudinal arc samples, are placed in a vertical centering state at the initial test, avoid errors of test results caused by the fact that the sample is not vertically centered, and improve the accuracy of the tensile test results.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a perpendicular centering device of tensile test sample centre gripping which characterized in that: comprises a lower vertical centering component (1) and an upper vertical centering component (2), wherein the lower vertical centering component (1) comprises a lower fixed base (3), a lower fixed base baffle (4) and a lower fixed base positioning block (5) are arranged on the lower fixed base (3), a lower central positioning support (6) is movably arranged on the lower fixed base (3), a lower vertical positioning support (7) is movably arranged on the lower central positioning support (6), a lower vertical positioning plate (8) is arranged on the lower vertical positioning support (7), the upper vertical centering component (2) comprises an upper fixed base (9), an upper fixed base baffle (10) and an upper fixed base positioning block (11) are arranged on the upper fixed base (9), an upper central positioning support (12) is movably arranged on the upper fixed base (9), and an upper vertical positioning support (13) is movably arranged on the upper central positioning support (12), an upper vertical positioning plate (14) is arranged on the upper vertical positioning support (13).
2. The tensile test specimen holding vertical centering device of claim 1, wherein: the upper part of the lower fixed base (3) is provided with lower fixed base main scale graduation lines (15), the lower part of the lower central positioning support (6) is provided with lower central positioning support vernier graduation lines (16), and the upper part of the lower central positioning support (6) is provided with lower central positioning support main scale graduation lines (17); the upper part of the upper fixed base (9) is provided with an upper fixed base main scale mark (18), the upper part of the upper center positioning support (12) is provided with an upper center positioning support vernier scale mark (19), and the lower part of the upper center positioning support (12) is provided with an upper center positioning support main scale mark (20).
3. The tensile test specimen holding vertical centering device of claim 1 or 2, wherein: the lower fixing base (3), the lower fixing base baffle (4) and the lower fixing base positioning block (5) are arranged to be of a T-shaped structure, and the upper fixing base (9), the upper fixing base baffle (10) and the upper fixing base positioning block (11) are arranged to be of a T-shaped structure.
4. The tensile test specimen holding vertical centering device of claim 1 or 2, wherein: the lower fixing base (3) is provided with a plurality of lower fixing base magnetization knobs (21), and the upper fixing base (9) is provided with a plurality of upper fixing base magnetization knobs (22).
5. The tensile test specimen holding vertical centering device of claim 1 or 2, wherein: lower vertical locating plate (8) and lower vertical location support (7) connect through lower vertical plate location knob (23), lower vertical locating plate (8) and lower fixed baseplate (3) arrange perpendicularly, last vertical locating plate (14) and last vertical location support (13) connect through last vertical plate location knob (24), go up vertical locating plate (14) and go up fixed baseplate (9) and arrange perpendicularly.
6. The clamping and vertical centering device for the tensile test specimen according to claim 1 or 2, wherein a lower central positioning support positioning block (25) is arranged on the lower central positioning support (6), the lower central positioning support (6) and the lower central positioning support positioning block (25) are arranged to be in L type structure, an upper central positioning support positioning block (26) is arranged on the upper central positioning support (12), and the upper central positioning support (12) and the upper central positioning support positioning block (26) are arranged to be in L type structure.
7. The tensile test specimen holding vertical centering device of claim 1 or 2, wherein: a lower fixed base sliding groove (27) is arranged at the upper part of the lower fixed base (3), a lower central positioning support sliding block (28) is arranged at the lower part of the lower central positioning support (6), a lower central positioning support sliding groove (29) is arranged at the lower part of the lower central positioning support (6), and a lower vertical positioning support sliding block (30) is arranged at the lower part of the lower vertical positioning support (7); an upper fixed base sliding groove (31) is formed in the lower portion of the upper fixed base (9), an upper center positioning support sliding block (32) is arranged on the upper portion of the upper center positioning support (12), an upper center positioning support sliding groove (33) is formed in the upper portion of the upper center positioning support (12), and an upper vertical positioning support sliding block (34) is arranged on the upper portion of the upper vertical positioning support (13).
8. A method for clamping and vertically centering a tensile test sample is characterized by comprising the following steps: the centering method comprises the following steps:
1) measuring the distance from the front surface of a lower cross beam (36) of the tensile testing machine to the plane of the central axis of a lower clamping block (37) by using a vernier caliper, setting the distance as Amm, and fixing a lower center positioning support (6) at Amm on a lower fixing base (3); fixing the lower vertical centering component (1) at a position above the lower cross beam (36); measuring the width dimension of the tensile sample (38) by using a vernier caliper, setting the width dimension to be Xmm, and fixing the lower vertical positioning support (7) at the position of X/2mm on the lower central positioning support (6); adjusting the lower vertical positioning plate (8) to be in a horizontal state;
2) measuring the distance from the front surface of an upper cross beam (39) of the tensile testing machine to the plane of the central axis of the upper clamping block (40) by using a vernier caliper, setting the distance as Bmm, and fixing an upper center positioning support (12) at Bmm on an upper fixed base (9); fixing the upper vertical centering component (2) at a position below the upper cross beam (39); measuring the width dimension of the tensile sample (38) by using a vernier caliper, setting the width dimension as Xmm, and fixing an upper vertical positioning support (13) at an X/2mm position on an upper central positioning support (12); adjusting the upper vertical positioning plate (14) to be in a horizontal state;
3) adjusting the position of the tensile sample (38), respectively attaching the side surfaces of the tensile sample (38) to the lower vertical positioning plate (8) and the upper vertical positioning plate (14), and controlling an upper clamping block (37) and a lower clamping block (40) of the clamping testing machine to clamp the tensile sample (38);
4) after the vertical centering of the tensile specimen (38) is completed, the lower vertical positioning plate (8) is adjusted to be vertical, and the upper vertical positioning plate (14) is adjusted to be vertical, so that a tensile test is performed.
9. The method of claim 8, wherein the method comprises: after Amm is set, the lower vertical centering component (1) is placed on a horizontal desktop, the lower center positioning support (6) is pushed to slide, the zero scale mark of the vernier scale mark (16) of the lower center positioning support is aligned with the position Amm of the scale mark (17) of the main scale of the lower fixed base, the lower center positioning support brake screw (41) is screwed, and the lower center positioning support (6) is fixed at Amm on the lower fixed base (3); the lower vertical centering component (1) is placed above a lower cross beam (36) of a tensile testing machine, a lower fixing base (3) is attached to the upper surface of the lower cross beam (36) tightly, a lower fixing base baffle (4) is attached to the front surface of the lower cross beam (36), the lower fixing base (3) is perpendicular to the plane where the front surface of the lower cross beam (36) is located and parallel to a lower clamping block (37), a lower fixing base magnetization knob (22) is rotated, and the lower vertical centering component (1) is fixed above the lower cross beam (36).
10. The method of claim 8 or 9 for clamping vertical centering of tensile test specimens, characterized in that: after Bmm is set, the upper vertical centering component (2) is placed on a horizontal desktop, the upper center positioning support (12) is pushed, the zero scale mark of the vernier scale mark (19) of the upper center positioning support is aligned with the position of Bmm on the scale mark (20) of the main scale of the upper fixing base, the brake screw (42) of the upper center positioning support is screwed, and the upper center positioning support (12) is fixed at Bmm on the upper fixing base (9); the upper vertical centering component (2) is placed below the upper cross beam (39), the upper fixing base (9) is attached to the lower surface of the upper cross beam (39) of the tensile testing machine, the baffle plate (10) of the upper fixing base is attached to the front surface of the upper cross beam (39), the upper fixing base (9) is perpendicular to the plane where the front surface of the upper cross beam (39) is located and parallel to the upper clamping block (40), the upper fixing base magnetization knob (23) is rotated, and the upper vertical centering component (2) is fixed below the upper cross beam (39).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702180A (en) * | 2021-08-13 | 2021-11-26 | 山东钢铁集团日照有限公司 | Initial accurate accuse position isolated plant of tensile properties test |
| CN117168968A (en) * | 2023-10-13 | 2023-12-05 | 江阴济化新材料有限公司 | Performance detection method and device for plastic particle production |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702180A (en) * | 2021-08-13 | 2021-11-26 | 山东钢铁集团日照有限公司 | Initial accurate accuse position isolated plant of tensile properties test |
| CN117168968A (en) * | 2023-10-13 | 2023-12-05 | 江阴济化新材料有限公司 | Performance detection method and device for plastic particle production |
| CN117168968B (en) * | 2023-10-13 | 2024-02-27 | 江阴济化新材料有限公司 | Performance detection method and device for plastic particle production |
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