CN111504772A - A tensile test specimen clamping vertical alignment device and its vertical alignment method - Google Patents

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

A tensile test specimen clamping vertical alignment device and its vertical alignment method

technical field

The invention belongs to the technical field of material mechanical properties test, and more particularly relates to a vertical centering device for clamping a tensile test sample, and also relates to a vertical centering method for clamping a tensile test sample.

Background technique

The tensile test of materials is the most basic and the most widely used test method in the mechanical properties test of materials. The tensile test of materials has important application value and reference value in the development of new materials, material procurement and acceptance, product quality control, and equipment safety evaluation. In some cases, the results of the tensile test can even be directly used. as a criterion for judging.

At present, most of the tensile testing machines use a wedge-shaped grip. When a tensile test is performed on a tensile test specimen with a circular cross-section, a special V-shaped clamp is used to ensure the clamping of the tensile sample. The holding end is just snapped into the V-shaped groove of the V-shaped clamping block, to ensure that the central axis of the circular cross-section tensile specimen coincides with the action line of the tensile testing machine force, and to ensure that the circular cross-section tensile specimen remains consistent In a vertical stretched state to prevent bias stress. However, when conducting tensile tests on tensile specimens such as rectangular cross-section specimens and longitudinally curved specimens, flat clamps are used. Flat clamps cannot perform vertical adjustment on rectangular cross-section specimens. , the operator needs to manually operate and place it to ensure that the central axis of the tensile test of the tensile test specimens such as rectangular cross-section specimens and longitudinal arc specimens coincides with the action line of the tensile testing machine force, so as to ensure that the rectangular cross-section specimens, Tensile specimens such as longitudinal arc specimens are always in a vertically stretched state and are vertically centered. This has higher requirements on the operator, and requires the operator to have rich test experience, and the operation is based on experience and feeling. Manual Manual Placement It is easy to place the tensile specimens such as rectangular cross-section specimens and longitudinal arc specimens at an inclination. Or it is impossible to make the central axis of the tensile specimen such as rectangular cross-section specimen and longitudinal arc specimen coincide with the action line of the tensile testing machine force, and the alignment of the specimen is not achieved. These errors lead to inaccurate test results. The impact on brittle materials is greater and the deviation is greater. However, when tensile specimens such as rectangular cross-section specimens and longitudinal arc specimens are placed obliquely or cannot be centered, they will be subjected to eccentric force, causing additional bending stress to the specimen, resulting in the specimen being subjected to horizontal Due to the component force in the direction, the measured value of the test force is smaller than the actual value, which eventually leads to a smaller measured material strength. , the greater the deviation.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: in view of the deficiencies of the prior art, a vertical centering device for clamping the tensile test specimen is provided, which has low manufacturing cost, simple structure, convenient operation, and simple and convenient maintenance and maintenance. It can quickly and accurately realize the vertical alignment of tensile test specimens (tensile specimens), and is effectively suitable for rectangular cross-section specimens, longitudinal arc specimens, etc. Tensile specimens are placed in vertical alignment at the beginning of the test. In the middle state, it can avoid the error of the test results caused by the sample not being placed in the vertical center, and improve the accuracy of the tensile test results.

To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

The invention relates to a vertical centering device for clamping a tensile test sample, comprising a lower vertical centering part and an upper vertical centering part, the lower vertical centering part includes a lower fixing base, and the lower fixing base is provided with The lower fixed base baffle and the lower fixed base positioning block, the lower central positioning support is movably installed on the lower fixed base, the lower vertical positioning support is movably installed on the lower central positioning support, and the lower vertical positioning support is set on the lower vertical positioning support. The positioning plate, the upper vertical centering component includes an upper fixed base, an upper fixed base baffle plate and an upper fixed base positioning block are arranged on the upper fixed base, and an upper central positioning support is movably installed on the upper fixed base, An upper vertical positioning support is movably installed 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 fixed base is provided with a lower fixed base main ruler scale line, the lower part of the lower central positioning support is provided with a lower central positioning support vernier scale, and the upper part of the lower central positioning support is provided with a lower central positioning support main ruler scale line ; The upper part of the upper fixed base is provided with the upper fixed base main ruler scale line, the upper part of the upper central positioning support is provided with the upper central positioning support vernier scale line, and the lower part of the upper central positioning support is provided with the upper central positioning support main ruler scale Wire.

The lower fixing base, the lower fixing base baffle and the lower fixing base positioning block are arranged in a T-shaped structure, and the upper fixing base, the upper fixing base baffle and the upper fixing base positioning block 11 are arranged in a shape. T-shaped structure.

The lower fixed base is provided with a plurality of lower fixed base magnetization knobs, and the upper fixed base is provided with a plurality of upper fixed base magnetization knobs.

The lower vertical positioning plate and the lower vertical positioning support are connected by the positioning knob of the lower vertical plate, the lower vertical positioning plate and the lower fixed base are arranged vertically, and the upper vertical positioning plate and the upper vertical positioning support are positioned by the upper vertical plate The knob is connected, and the upper vertical positioning plate and the upper fixed base are arranged vertically.

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 in an L-shaped structure, and an upper center is set on the upper center positioning support The positioning support positioning block, the upper center positioning support and the upper center positioning support positioning block are arranged in an L-shaped structure.

The upper part of the lower fixed base is provided with a lower fixed base chute, the lower part of the lower central positioning support is provided with a lower central positioning support slider, the lower part of the lower central positioning support is provided with a lower central positioning support chute, and the lower vertical positioning support The lower part of the seat is provided with a lower vertical positioning support slider; the lower part of the upper fixed base is provided with an upper fixed base chute, the upper part of the upper center positioning support is provided with an upper center positioning support slider, and the upper part of the upper center positioning support is provided with an upper center positioning support The upper part of the upper vertical positioning support is provided with the upper vertical positioning support sliding block.

The invention also relates to a method that can quickly and accurately realize the vertical alignment of tensile test specimens (tensile specimens), and is effectively suitable for tensile specimens such as rectangular cross-section specimens, longitudinal arc specimens and other tensile specimens at the beginning of the test. It is placed in a vertical alignment state to avoid errors in the test results caused by the specimen not being placed in the vertical alignment, and to improve the accuracy of the tensile test results by clamping the vertical alignment method of the tensile test specimen. :

1) Use a vernier caliper to measure the distance from the front of the lower beam of the tensile testing machine to the plane where the central axis of the lower clamping block is located, set it as Amm, and fix the lower center positioning support at Amm on the lower fixed base; The middle part is fixed at the position above the lower beam; the width of the tensile specimen is measured with a vernier caliper, set as Xmm, and the lower vertical positioning support is fixed at X/2mm on the lower central positioning support; the lower vertical positioning plate is adjusted to horizontal state;

2) Use vernier calipers to measure the distance from the front of the upper beam of the tensile testing machine to the plane where the central axis of the upper clamping block is located, set it as Bmm, and fix the upper center positioning support at Bmm on the upper fixed base; The centering part is fixed at the position below the upper beam; the width of the tensile specimen is measured with a vernier caliper, set as Xmm, and the upper vertical positioning support is fixed at X/2mm on the upper center positioning support; the upper vertical positioning plate Adjust to the horizontal state;

3) Adjust the position of the tensile sample, let the side of the tensile sample fit with the lower vertical positioning plate and the upper vertical positioning plate respectively, and control the upper and lower clamping blocks of the clamping testing machine to clamp the tensile sample;

4) After completing the vertical alignment of the tensile specimen, adjust the lower vertical positioning plate to a vertical state, and adjust the upper vertical positioning plate to a vertical state to conduct a tensile test.

After setting the Amm, place the lower vertical centering component on the horizontal table, push the lower center positioning support to slide, and make the zero scale line of the vernier scale line of the lower center positioning support align with Amm on the main scale line of the lower fixed base. The position of the lower center positioning support is tightened, and the lower center positioning support is fixed at the Amm position on the lower fixed base; the lower vertical centering component is placed above the lower beam of the tensile testing machine, and the lower center positioning support is fixed. The base is close to the upper surface of the lower beam, so that the baffle plate of the lower fixed base is attached to the front of the lower beam, and at the same time, the lower fixed base is perpendicular to the plane where the front of the lower beam is located, and is parallel to the lower clamping block, and the lower fixed base is rotated to magnetize knob to secure the lower vertical centering part over the lower beam.

After setting Bmm, place the upper vertical centering part on a horizontal table, push the upper center positioning support, and make the zero scale line of the vernier scale line of the upper center positioning support align with the main scale line of the upper fixed base. Bmm position, tighten the upper center positioning support brake screw, and fix the upper center positioning support at the Bmm position on the upper fixed base; Paste the lower surface of the upper beam of the tensile testing machine, let the upper fixed base baffle plate fit with the front of the upper beam, and at the same time make the upper fixed base perpendicular to the plane where the front of the upper beam is located, and parallel to the upper clamp block, rotate the upper fixed base to magnetize knob to secure the upper vertical centering part under the upper beam.

Adopting the technical scheme of the present invention, the following beneficial effects can be obtained:

The vertical centering device for clamping the tensile test sample and the vertical centering method thereof according to the present invention, when the vertical centering of the tensile sample needs to be performed, the vertical centering device and the tension test sample are clamped by the tensile test sample. With the cooperation of the tensile testing machine, the vertical alignment of the tensile specimen can be quickly and accurately achieved, and the subsequent tensile testing can be carried out reliably. More importantly, it can be effectively applied to tensile specimens of rectangular cross-section specimens, longitudinal arc specimens and other shapes. The vertical centering (vertical centering) method is as follows: use a vernier caliper to measure the distance from the front of the lower beam of the tensile testing machine to the plane where the central axis of the lower clamping block is located, set it as Amm, and fix the lower center positioning support. At Amm on the lower fixing base; fix the lower vertical centering part on the top of the lower beam; measure the width of the tensile specimen with a vernier caliper, set it as Xmm, and fix the lower vertical positioning support on the lower center positioning support X/2mm; adjust the lower vertical positioning plate to a horizontal state; use a vernier caliper to measure the distance from the front of the upper beam of the tensile testing machine to the plane where the central axis of the upper clamping block is located, set it as Bmm, and set the upper center positioning support Fix it at the Bmm position on the upper fixed base; fix the upper vertical centering part at the position below the upper beam; measure the width of the tensile specimen with a vernier caliper, set it as Xmm, and fix the upper vertical positioning support at the upper center. X/2mm on the support; adjust the upper vertical positioning plate to a horizontal state; adjust the position of the tensile sample so that the sides of the tensile sample fit with the lower vertical positioning plate and the upper vertical positioning plate respectively, and control the clamping The upper clamp block and the lower clamp block of the testing machine clamp the tensile sample; after the vertical alignment of the tensile sample is completed, adjust the lower vertical positioning plate to the vertical state, and adjust the upper vertical positioning plate to the vertical state to stretch the sample. test. The vertical centering device for clamping the tensile test sample and the vertical centering method thereof of the present invention have the advantages of low manufacturing cost, simple structure, convenient operation, simple and convenient maintenance and maintenance, and can quickly and accurately realize the tension test during the tensile test. The tensile test specimen (tensile specimen) is vertically centered, which is effectively suitable for tensile specimens such as rectangular cross-section specimens and longitudinal arc specimens. It is placed in a vertical alignment state at the beginning of the test to avoid the specimen Not vertically centered will lead to errors in the test results and improve the accuracy of the tensile test results.

Description of drawings

Below is a brief description of the contents expressed in the drawings of this specification and the symbols in the drawings:

1 is a schematic structural diagram of the front-view arrangement state of the lower vertical centering part and the upper vertical centering part of the vertical centering device for clamping the tensile test sample according to the present invention;

2 is a schematic structural diagram of the arrangement state of the lower vertical centering part and the upper vertical centering part of the vertical centering device for clamping the tensile test sample according to the present invention;

3 is a schematic structural diagram of the side view arrangement state of the lower vertical centering part and the upper vertical centering part of the vertical centering device for clamping the tensile test sample according to the present invention;

4 is a partial structural schematic diagram of the lower vertical positioning support and the lower vertical positioning plate of the tensile test sample clamping vertical centering device according to the present invention;

5 is a partial structural schematic diagram of the upper vertical positioning support and the upper vertical positioning plate of the tensile test sample clamping vertical centering device according to the present invention;

FIG. 6 is a schematic structural diagram of the vertical alignment device of the present invention when the tensile test specimen is clamped and the tensile tester cooperates to perform the vertical alignment of the tensile specimen;

The marks in the accompanying drawings are: 1, the lower vertical centering part; 2, the upper vertical centering part; 3, the lower fixed base; 4, the lower fixed base baffle; 5, the lower fixed base positioning block; 6, Lower center positioning support; 7. Lower vertical positioning support; 8. Lower vertical positioning plate; 9. Upper fixed base; 10. Upper fixed base baffle; 11. Upper fixed base positioning block; 12. Upper center Positioning support; 13. Upper vertical positioning support; 14. Upper vertical positioning plate; 15. Lower fixed base main ruler scale line; 16. Lower center positioning support vernier scale line; 17. Lower center positioning support main ruler Scale line; 18. Main scale scale line of upper fixed base; 19. Vernier scale line of upper center positioning support; 20. Main scale scale line of upper center positioning support; 21. Magnetization knob of lower fixed base; 22. Upper fixed Base magnetization knob; 23, lower vertical plate positioning knob; 24, upper vertical plate positioning knob; 25, lower center positioning support positioning block; 26, upper center positioning support positioning block; 27, lower fixed base chute; 28 , Lower center positioning support slider; 29, Lower center positioning support chute; 30, Lower vertical positioning support slider; 31, Upper fixed base chute; 32, Upper center positioning support slider; 33, Upper center positioning support chute; 34, upper vertical positioning support slider; 36, lower beam; 37, lower clamp; 38, tensile specimen; 39, upper beam; 40, upper clamp; 41, lower Center positioning support brake screw; 42. Upper center positioning support brake screw; 43. Lower vertical positioning support vernier scale line; 44. Upper vertical positioning support vernier scale line; 45. Lower vertical positioning support brake screw; 46, upper vertical positioning support brake screw; 47, lower vertical positioning plate screw; 48, upper vertical positioning plate screw.

Detailed ways

In the following, referring to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention, such as the shape and structure of each component involved, the mutual position and connection relationship between each part, the function and working principle of each part, etc. will be further described. Details of:

As shown in Figures 1 to 5, the present invention is a vertical centering device for clamping a tensile test sample, comprising a lower vertical centering part 1 and an upper vertical centering part 2. The lower vertical centering part The component 1 includes 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, and a lower central positioning support 6 is movably installed on the lower fixed base 3, and the lower central positioning The lower vertical positioning support 7 is movably installed on the support 6, and the lower vertical positioning plate 8 is arranged on the lower vertical positioning support 7. The upper vertical centering member 2 includes an upper fixed base 9, and the upper fixed base 9 is provided The upper fixed base baffle 10 and the upper fixed base positioning block 11, the upper central positioning support 12 is movably installed on the upper fixed base 9, the upper vertical positioning support 13 is movably installed on the upper central positioning support 12, and the upper vertical positioning A vertical positioning plate 14 is arranged on the support 13 . With the above structure, when the vertical alignment of the tensile specimen is required, the vertical alignment device of the tensile test specimen is clamped to cooperate with the tensile testing machine, which can quickly and accurately realize the vertical alignment of the tensile specimen and ensure the subsequent Tensile tests are performed reliably. More importantly, it can be effectively applied to tensile specimens of rectangular cross-section specimens, longitudinal arc specimens and other shapes. And the described vertical centering (vertical centering) method is: use vernier calipers to measure the distance from the front of the lower beam 36 of the tensile testing machine to the plane where the central axis of the lower clamping block 37 is located, set it as Amm, and set the lower center positioning support The seat 6 is fixed at Amm on the lower fixed base 3; the lower vertical centering part 1 is fixed at the upper position of the lower beam 36; the width dimension of the tensile sample 38 is measured with a vernier caliper, and it is set to Xmm, and the lower vertical positioning support is 7. Fix it at X/2mm on the lower center positioning support 6; adjust the lower vertical positioning plate 8 to a horizontal state; use a vernier caliper to measure the distance from the front of the upper beam 39 of the tensile testing machine to the plane where the central axis of the upper clamping block 40 is located. , set as Bmm, fix the upper center positioning support 12 at the Bmm place on the upper fixed base 9; fix the upper vertical centering part 2 at the position below the upper beam 39; measure the width of the tensile sample 38 with a vernier caliper The size is set to Xmm, and the upper vertical positioning support 13 is fixed at X/2mm on the upper central positioning support 12; the upper vertical positioning plate 14 is adjusted to the horizontal state; The sides of the sample 38 are respectively attached to the lower vertical positioning plate 8 and the upper vertical positioning plate 14, and the upper clamping block 37 and the lower clamping block 40 of the clamping test machine are controlled to clamp the tensile sample 38; the tensile sample 38 is completed. For vertical alignment, adjust the lower vertical positioning plate 8 to a vertical state, adjust the upper vertical positioning plate 14 to a vertical state, and conduct a tensile test. The vertical centering device for clamping the tensile test sample and the vertical centering method thereof according to the present invention have the advantages of low manufacturing cost, simple structure, convenient operation, and simple and convenient maintenance and repair. Accurately achieve vertical alignment of tensile test specimens (tensile specimens), and is effectively suitable for tensile specimens such as rectangular cross-section specimens, longitudinally curved specimens, etc., which are placed vertically aligned at the beginning of the test state, to avoid errors in the test results caused by the specimen not being placed vertically in the center, and to improve the accuracy of the tensile test results.

The upper part of the lower fixed base 3 is provided with a lower fixed base main ruler scale line 15, the lower part of the lower central positioning support 6 is provided with a lower central positioning support vernier scale line 16, and the upper part of the lower central positioning support 6 is provided with a lower central positioning support The main ruler scale line 17 of the seat; the upper part of the upper fixed base 9 is provided with the upper fixed base main ruler scale line 18, the upper part of the upper center positioning support 12 is provided with the upper center positioning support vernier mark 19, and the upper center positioning support The lower part of 12 is provided with the main ruler scale line 20 of the upper center positioning support. The above structure, the setting of each scale line is convenient for the relative positions of the lower fixed base 3, the lower central positioning support 6 and the lower vertical positioning support 7 to be accurately adjusted according to the requirements, which is convenient for the upper fixed base 9 and the upper central positioning support 12. . The relative position of the upper vertical positioning support 13 is adjusted according to the requirements, so as to efficiently and accurately complete the vertical alignment of the tensile specimen.

The lower fixed base 3, the lower fixed base baffle 4 and the lower fixed base positioning block 5 are arranged in a T-shaped structure, and the upper fixed base 9, the upper fixed base baffle 10 and the upper fixed base are positioned. The blocks 11 are arranged in a T-shaped configuration. In the above structure, the lower fixed base baffle 4 is convenient for the use of the vertical centering device, and it can reliably fit and cooperate with the front surface of the lower beam of the tensile testing machine, and the lower fixed base positioning block 10 can align the upper center positioning support 12. The position of the side realizes a reliable limit. At the same time, when the upper fixed base baffle 10 is convenient for the use of the vertical alignment device, it is convenient for reliable fitting with the front face of the upper beam of the tensile testing machine, and the upper fixed base positioning block 11 can align the upper center positioning support 12 The position on one side realizes a reliable limit.

The lower fixed base 3 is provided with a plurality of lower fixed base magnetization knobs 21 , and the upper fixed base 9 is provided with a plurality of upper fixed base magnetization knobs 22 . With the above structure, rotating the lower fixed base knob can adjust the direction of the magnetic pole of the powerful magnet toward the position of the bottom surface of the lower fixed base, thereby magnetizing the bottom surface of the lower fixed base, and reliably realize that the lower vertical centering part is fixed on the tensile test by the lower fixed base. above the lower beam of the machine. Rotating the upper fixed base knob can adjust the direction of the magnetic pole of the strong magnet toward the bottom surface of the upper fixed base, so as to magnetize the bottom surface of the upper fixed base, and reliably realize that the upper vertical centering part is fixed on the upper part of the tensile testing machine through the upper fixed base below the beam. In this way, it is convenient for the subsequent vertical alignment adjustment of the tensile specimen.

The lower vertical positioning plate 8 and the lower vertical positioning support 7 are connected by the lower vertical plate positioning knob 23, the lower vertical positioning plate 8 and the lower fixed base 3 are vertically arranged, and the upper vertical positioning plate 14 and the upper vertical positioning support are arranged vertically. The seat 13 is connected by the upper vertical plate positioning knob 24, and the upper vertical positioning plate 14 and the upper fixed base 9 are arranged vertically. In the above structure, the upper vertical positioning plate 14 can limit the sample, and the positioning is realized by the positioning knob 24 of the upper vertical plate.

The lower central positioning support 6 is provided with a lower central positioning support positioning block 25, the lower central positioning support 6 and the lower central positioning support positioning block 25 are arranged in an L-shaped structure, and the upper central positioning support An upper center positioning support positioning block 26 is arranged on the upper center positioning support 12 , and the upper center positioning support 12 and the upper center positioning support positioning block 26 are arranged in an L-shaped structure.

The upper part of the lower fixed base 3 is provided with a lower fixed base chute 27, the lower part of the lower central positioning support 6 is provided with a lower central positioning support slider 28, and the lower part of the lower central positioning support 6 is provided with a lower central positioning support chute 29. The lower vertical positioning support slider 30 is set at the lower part of the lower vertical positioning support 7; the upper fixed base chute 31 is set at the lower part of the upper fixed base 9, and the upper central positioning support slide block 32 is set at the upper part of the upper central positioning support 12 The upper center positioning support 12 is provided with an upper center positioning support chute 33, and the upper vertical positioning support 13 is provided with an upper vertical positioning support sliding block 34. In the above structure, the lower central positioning support 6 can slide relative to the lower fixed base 3 , and the lower vertical positioning support 7 can slide relative to the lower central positioning support 6 . The upper central positioning support 12 can slide relative to the upper fixed base 9 , and the upper vertical positioning support 13 can slide relative to the upper central positioning support 12 . In this way, device position adjustment is achieved. The lower vertical centering part 1 and the upper vertical centering part 2 are vertically centered from the upper and lower positions.

As shown in FIG. 6 , the present invention also relates to a method that can quickly and accurately realize the vertical alignment of the tensile test specimen, and is effectively suitable for tensile specimens such as rectangular cross-section specimens and longitudinally curved specimens at the initial stage of the test. It is placed in a vertical alignment state when the sample is placed in a vertical alignment state, to avoid errors in the test results caused by the specimen not being placed in the vertical alignment, and to improve the accuracy of the tensile test results. The tensile test specimen clamping vertical alignment method. The (vertical centering) method is:

1) measure the distance dimension from the front of the lower beam 36 of the tensile testing machine to the plane where the central axis of the lower clamping block 37 is located with a vernier caliper, set to Amm, and fix the lower center positioning support 6 at the Amm place on the lower fixed base 3; Fix the lower vertical centering part 1 at the position above the lower beam 36; measure the width of the tensile sample 38 with a vernier caliper, set it as Xmm, and fix the lower vertical positioning support 7 on the lower center positioning support 6 X/2mm place; adjust the lower vertical positioning plate 8 to a horizontal state; 2) measure the distance dimension from the front of the upper beam 39 of the tensile testing machine to the plane where the central axis of the upper clamping block 40 is located with a vernier caliper, set as Bmm, and the upper center positioning support The seat 12 is fixed at the Bmm position on the upper fixed base 9; the upper vertical centering part 2 is fixed at the position below the upper beam 39; the width dimension of the tensile sample 38 is measured with a vernier caliper, set as Xmm, and the upper vertical positioning support is The seat 13 is fixed at the X/2mm position on the upper center positioning support 12; the upper vertical positioning plate 14 is adjusted to a horizontal state; 3) The position of the tensile sample 38 is adjusted so that the side of the tensile sample 38 is vertically positioned with the bottom The plate 8 and the upper vertical positioning plate 14 are attached to each other, and the upper clamping block 37 and the lower clamping block 40 of the clamping test machine are controlled to clamp the tensile sample 38; 4) After completing the vertical alignment of the tensile sample 38, place the lower The vertical positioning plate 8 is adjusted to a vertical state, the upper vertical positioning plate 14 is adjusted to a vertical state, and the sample tensile test is performed.

After setting Amm, place the lower vertical centering component 1 on the horizontal table, push the lower center positioning support 6 to slide, so that the zero scale line of the vernier scale line 16 of the lower center positioning support is aligned with the main scale of the lower fixed base. At the position of Amm on line 17, tighten the lower center positioning support stop screw 41, and fix the lower center positioning support 6 at the Amm position on the lower fixed base 3; place the lower vertical centering part 1 on the tensile testing machine. Above the lower beam 36, let the lower fixed base 3 be close to the upper surface of the lower beam 36, let the lower fixed base baffle 4 fit the front of the lower beam 36, and make the lower fixed base 3 and the front of the lower beam 36. Vertical and parallel to the lower clamping block 37 , rotate the lower fixed base magnetization knob 22 to fix the lower vertical centering member 1 above the lower beam 36 . The above steps, when the lower vertical centering member 1 is fixed, rotate the lower fixed base magnetization knob 22 to magnetize the bottom surface of the lower fixed base 3, so that the lower vertical centering device 1 is fixed on the lower beam, so as to be able to be aligned with the upper vertical centering member. 2 Use together to complete the tensile test of the sample. The sample clamping is vertically centered, which is convenient for the tensile test of the sample. And reversely rotate the lower fixed base magnetization knob 22 , that is, to eliminate the magnetization of the bottom surface of the lower fixed base 3 .

After setting Bmm, place the upper vertical centering component 2 on a horizontal table, push the upper center positioning support 12, and make the zero scale line of the vernier scale line 19 of the upper center positioning support align with the main scale of the upper fixed base. At the position of Bmm on the line 20, tighten the upper center positioning support brake screw 42, and fix the upper center positioning support 12 at the Bmm position on the upper fixed base 9; place the upper vertical centering component 2 on the upper beam Below 39, let the upper fixed base 9 be close to the lower surface of the upper beam 39 of the tensile testing machine, let the upper fixed base baffle 10 fit the front of the upper beam 39, and simultaneously make the upper fixed base 9 and the front of the upper beam 39 The plane is located Vertical and parallel to the upper clamping block 40 , rotate the upper fixed base magnetization knob 23 to fix the upper vertical centering member 2 under the upper beam 39 . The above-mentioned steps, when the upper vertical centering member 2 is fixed, rotate the upper fixed base magnetization knob 23 to magnetize the upper fixed base 9 bottom surface, and let the upper vertical centering device 2 be fixed on the upper beam, so as to be able to be vertically centered with the lower The component 1 is used together to complete the tensile test of the sample. The sample is clamped and vertically centered, which is convenient for the tensile test of the sample. And reversely rotate the magnetization knob 23 of the upper fixed base, that is, to eliminate the magnetization of the bottom surface of the upper fixed base 9 .

The vertical centering device for clamping the tensile test sample and the vertical centering method thereof according to the present invention, when the vertical centering of the tensile sample needs to be performed, the vertical centering device and the tension test sample are clamped by the tensile test sample. With the cooperation of the tensile testing machine, the vertical alignment of the tensile specimen can be quickly and accurately achieved, and the subsequent tensile testing can be carried out reliably. More importantly, it can be effectively applied to tensile specimens of rectangular cross-section specimens, longitudinal arc specimens and other shapes. The vertical centering (vertical centering) method is as follows: use a vernier caliper to measure the distance from the front of the lower beam of the tensile testing machine to the plane where the central axis of the lower clamping block is located, set it as Amm, and fix the lower center positioning support. At Amm on the lower fixing base; fix the lower vertical centering part on the top of the lower beam; measure the width of the tensile specimen with a vernier caliper, set it as Xmm, and fix the lower vertical positioning support on the lower center positioning support X/2mm; adjust the lower vertical positioning plate to a horizontal state; use a vernier caliper to measure the distance from the front of the upper beam of the tensile testing machine to the plane where the central axis of the upper clamping block is located, set it as Bmm, and set the upper center positioning support Fix it at the Bmm position on the upper fixed base; fix the upper vertical centering part at the position below the upper beam; measure the width of the tensile specimen with a vernier caliper, set it as Xmm, and fix the upper vertical positioning support at the upper center. X/2mm on the support; adjust the upper vertical positioning plate to a horizontal state; adjust the position of the tensile sample so that the sides of the tensile sample fit with the lower vertical positioning plate and the upper vertical positioning plate respectively, and control the clamping The upper clamp block and the lower clamp block of the testing machine clamp the tensile sample; after the vertical alignment of the tensile sample is completed, adjust the lower vertical positioning plate to the vertical state, and adjust the upper vertical positioning plate to the vertical state to stretch the sample. test. The vertical centering device for clamping the tensile test sample and the vertical centering method thereof of the present invention have the advantages of low manufacturing cost, simple structure, convenient operation, simple and convenient maintenance and maintenance, and can quickly and accurately realize the tension test during the tensile test. The tensile test specimen (tensile specimen) is vertically centered, which is effectively suitable for tensile specimens such as rectangular cross-section specimens and longitudinal arc specimens. It is placed in a vertical alignment state at the beginning of the test to avoid the specimen Not vertically centered will lead to errors in the test results and improve the accuracy of the tensile test results.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned methods, as long as various improvements made by the method concept and technical solutions of the present invention are adopted, or the present invention is modified without improvement. If the concept and technical solutions of the invention are directly applied to other occasions, they are all within the protection scope of the present 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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