CN114199672A - Prefabricated excellent extension equipment tension accredited testing organization - Google Patents
Prefabricated excellent extension equipment tension accredited testing organization Download PDFInfo
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- CN114199672A CN114199672A CN202111549845.2A CN202111549845A CN114199672A CN 114199672 A CN114199672 A CN 114199672A CN 202111549845 A CN202111549845 A CN 202111549845A CN 114199672 A CN114199672 A CN 114199672A
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- clamp
- preform
- testing mechanism
- sliding seat
- lead screw
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- 230000008520 organization Effects 0.000 title claims description 3
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010998 test method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 238000009795 derivation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a tension testing mechanism of a preform rod extension device, which comprises: a frame body; the clamp is arranged on the frame body and clamps the extension rod; the moving assembly is arranged on the frame body and comprises a lead screw which is longitudinally arranged, a sliding seat which is sleeved outside the lead screw and a connecting piece which is respectively connected with the clamp and the sliding seat, and the sliding seat drives the connecting piece and the clamp to move up and down; the force sensor comprises a resistance strain gauge, and the resistance strain gauge is arranged on the connecting piece; by installing the force cell on the connecting piece instead of on the clamp or the rod hanging device, the problems of inaccurate test result, excessively complicated structure and high manufacturing cost of the existing tension test method can be solved.
Description
Technical Field
The invention relates to a tension testing mechanism of a preform rod extension device, and belongs to the technical field of optical fiber preform rods.
Background
Currently, the tension test of preform extension equipment generally adopts two methods: firstly, a tension test sensor is arranged at the top of a preform rod hanging device for testing; second, by adding a vertical load cell to the clamp.
However, both of the above methods have drawbacks. In the first method, a graphite felt or a quartz felt is generally used for sealing during the extension of the preform, and when the preform and the sealing material are pressed against each other, the test data is affected by the friction between the preform and the sealing material, and thus it is impossible to accurately measure the data. In the second method, when the clamp is tightened, the longitudinal friction between the longitudinal guide rail pairs for fixing the force transducer is increased due to overlarge pressure, so that the test result is distorted, and the method causes the structure of the clamp to be complicated, greatly increases the difficulty of subsequent calibration and maintenance and has high manufacturing cost.
Disclosure of Invention
The invention aims to provide a tension testing mechanism of preform extending equipment, which is used for solving the problems that the testing result of the existing tension testing method is inaccurate and the structural complexity is increased.
In order to achieve the purpose, the invention provides the following technical scheme:
a preform extension apparatus tension testing mechanism comprising:
a frame body;
the clamp is arranged on the frame body and clamps the extension rod;
the moving assembly is arranged on the frame body and comprises a lead screw which is longitudinally arranged, a sliding seat which is sleeved outside the lead screw and connecting pieces which are respectively connected with the clamp and the sliding seat, and the sliding seat drives the connecting pieces and the clamp to move up and down;
and the force measuring sensor comprises a resistance strain gauge, and the resistance strain gauge is arranged on the connecting piece.
Further, the connecting piece is provided with a first connecting plate and a second connecting plate connected with the first connecting plate, the first connecting plate is connected with the sliding seat, and the second connecting plate is connected with the clamp.
Further, the moving assembly further comprises a sliding rail, and the screw rod is mounted on the sliding rail.
Furthermore, a clamping part extends outwards from the first connecting plate, and the clamping part is connected with the sliding rail in a clamping manner.
Further, the resistance strain gauge is installed in the center of the second connecting plate.
Further, the clamp comprises a clamping jaw for clamping the extension rod and a connecting block connected with the second connecting plate.
Further, the second connecting plate is provided with a first connecting end and a second connecting end opposite to the first connecting end, the first connecting plate is located at the first connecting end, and the connecting block is located at the second connecting end.
Further, the moving assembly further comprises a motor, and the motor is installed at one end of the screw rod and drives the screw rod to rotate.
The invention has the beneficial effects that: the tension testing mechanism comprises a frame body, a clamp, a moving assembly and a force measuring sensor, wherein the clamp, the moving assembly and the force measuring sensor are mounted on the frame body; by installing the force cell on the connecting piece instead of on the clamp or the rod hanging device, the problems of inaccurate test result, excessively complicated structure and high manufacturing cost of the existing tension test method can be solved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of a tension testing mechanism of a preform rod extending apparatus according to the present invention;
FIG. 2 is a schematic view showing a partial structure of a tension measuring mechanism of an apparatus for elongating a preform according to the present invention;
fig. 3 is a schematic diagram of a tension derivation formula.
100-a preform extending equipment tension testing mechanism, 1-a frame body, 2-a clamp, 21-a clamping jaw, 22-a connecting block, 3-a moving component, 31-a screw rod, 32-a sliding seat, 33-a connecting piece, 331-a first connecting plate, 3311-a front end surface, 332-a second connecting plate, 3321-a first connecting end, 3322-a second connecting end, 333-a clamping part, 34-a sliding rail, 4-a force measuring sensor, 41-a resistance strain gauge, 200-an extending rod and 300-preform extending equipment.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The following detailed description of embodiments of the present application will be described in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
Referring to fig. 1 to 2, a preferred embodiment of the present application provides a tensile testing mechanism 100 for a preform extending apparatus, which includes a frame 1, and a clamp 2, a moving assembly 3, and a load cell 4 mounted on the frame 1. Wherein the clamp 2 is used to clamp the extension bar 200. The moving assembly 3 is used as a structure for stretching the extension rod 200, and comprises a longitudinally arranged screw rod 31, a sliding seat 32 sleeved outside the screw rod 31, and a connecting piece 33 respectively connecting the clamp 2 and the sliding seat 32, wherein when the preform extension device 300 works, the sliding seat 32 can drive the connecting piece 33 and the clamp 2 to move up and down, and then the extension rod 200 is stretched. The load cell 4 is used for detecting a change in tension in real time, and includes a resistance strain gauge 41, and the resistance strain gauge 41 is mounted on the connecting member 33. By the arrangement, the load cell 4 is prevented from causing inaccurate measuring results due to the action of external force. The external force may be a frictional force between the extension bar 200 and the seal structure, a frictional force between the jig 2 and the guide rail, or other external forces.
The moving assembly 3 further includes a motor (not shown) installed at one end of the screw rod 31 and driving the screw rod 31 to rotate. At this time, the preform extending apparatus 300 extends: the motor rotates to the first direction, and drives the screw rod 31 to rotate to the first direction at the same time, at this time, the sliding seat 32 moves downwards due to the rotation of the screw rod 31 to the first direction, and drives the connecting piece 33 and the clamp 2 to move downwards at the same time, and the clamp 2 clamps the extension rod 200, so that the extension rod 200 is stretched in the process of moving downwards of the clamp 2. When the sliding seat 32 moves downward to a certain position, the sliding seat 32 needs to move upward again to the top end of the screw rod 31, at this time, the motor rotates in the second direction, and drives the screw rod 31 to rotate in the second direction at the same time, the sliding seat 32 drives the connecting piece 33 and the clamp 2 to move upward to the top end of the screw rod 31, and at this time, a stretching process is finished. Wherein, the first direction and the second direction are two opposite directions.
In this embodiment, the connecting member 33 has an "L" shape. Specifically, the connecting member 33 has a first connecting plate 331 and a second connecting plate 332 connected to the first connecting plate 331, the first connecting plate 331 and the second connecting plate 332 are perpendicular to each other, the first connecting plate 331 is connected to the sliding seat 32, and the second connecting plate 332 is connected to the jig 2.
In order to ensure that the connecting member 33 does not rotate left and right along with the screw rod 31 during the up-and-down movement, and further to omit the subsequent step of repeatedly calibrating the clamp 2, and reduce the complexity of the stretching process, in one embodiment, the moving assembly 3 further includes a slide rail 34, the screw rod 31 is mounted on the slide rail 34, a clamping portion 333 extends outwards from the first connecting plate 331, and the clamping portion 333 is in clamping connection with the slide rail 34. Specifically, the clamping portion 333 is formed by extending from a rear end surface (not shown) of the first connecting plate 331 toward the direction of the screw rod 31, the clamping portion 333 is two pairs of hooks, the two pairs of hooks are distributed in an up-down structure, each pair of hooks is respectively located at the left and right sides of the first connecting plate 331, and the front end surface 3311 of the first connecting plate 331 always faces the same direction in the up-down moving process through the engagement of the hooks and the slide rails 34.
The jig 2 includes a clamping jaw 21 for clamping the extension bar 300 and a connection block 22 connected to the second connection plate 332. In order to ensure that the resistance strain gauge 41 can sense a relatively significant deformation, in one embodiment, the second connection plate 332 has a first connection end 3321 and a second connection end 3322 opposite to the first connection end 3321, the first connection plate 331 is located at the first connection end 3321, and the connection block 22 is located at the second connection end 3322. Since the connection block 22 is located at the second connection end 3322, when the connection block 22 has a tension, the tension can cause the second connection plate 332 to have the most significant deformation only at the second connection end 3322.
Alternatively, the mounting position of the resistance strain gauge 41 is not unique. In the present embodiment, the resistance strain gauge 41 is installed in the center of the second connection plate 332, and the position is always unchanged.
Fig. 3 is a schematic diagram of a tension derivation formula. As shown in fig. 3, point a is the mounting position of the clip, point B is the mounting position of the resistance strain gauge, L is the vertical distance between A, B points, and y is the amount of deformation at point a. The derivation process of the tension test formula is as follows: first, the relationship between strain ε and stress σ is: epsilon is sigma/E; then, according to the formula σ ═ F × L × y/Iz of the bending force of the material-mechanical beam, ∈ ═ F × L × y/(Iz × E) is obtained, where Iz is the moment of inertia of the connecting member and is a fixed value, and E is the elastic modulus, and since the material of the connecting member is fixed, E is a fixed value. Since L, y, Iz, and E are fixed values, the strain ∈ and the tension F are linearly related to each other, that is, the final relation between the tension and the strain is F ═ K ∈, and K is a calibration coefficient.
It should be noted that, in order to improve the accuracy of the tension test result, in one embodiment, multiple sets of tests may be performed, and the average value of the calibration coefficients in the multiple sets of tests is determined as the final calibration coefficient K. Schematically, step 1, placing a heavy object at a point A, wherein the weight is F1, and measuring a strain value epsilon 1 of a point B by a load cell; step 2, calculating K1 as F1/epsilon 1; and 3, repeating the steps 1 and 2, and calculating the average value K of the multiple groups of K1-Kn values.
In summary, the application provides a tension testing mechanism for a preform extending device, which comprises a frame body, a clamp, a moving assembly and a force transducer, wherein the clamp, the moving assembly and the force transducer are arranged on the frame body; by installing the force cell on the connecting piece instead of on the clamp or the rod hanging device, the problems of inaccurate test result, excessively complicated structure and high manufacturing cost of the existing tension test method can be solved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A preform extends equipment tension accredited testing organization, includes:
a frame body;
the clamp is arranged on the frame body and clamps the extension rod;
the moving assembly is arranged on the frame body and comprises a lead screw which is longitudinally arranged, a sliding seat which is sleeved outside the lead screw and connecting pieces which are respectively connected with the clamp and the sliding seat, and the sliding seat drives the connecting pieces and the clamp to move up and down;
and the force measuring sensor comprises a resistance strain gauge, and the resistance strain gauge is arranged on the connecting piece.
2. The preform extension apparatus tension testing mechanism of claim 1, wherein the link has a first link plate connected to the slide base and a second link plate connected to the jig.
3. The preform extension apparatus tension testing mechanism of claim 1, wherein the moving assembly further comprises a slide rail on which the lead screw is mounted.
4. The preform extension apparatus tension testing mechanism of claim 3, wherein the first connecting plate is outwardly extended with a catch, and the catch is engaged with the slide rail.
5. The preform extension apparatus tension testing mechanism of claim 2, wherein the resistance strain gauge is installed at the center of the second connecting plate.
6. The preform extension apparatus tension testing mechanism of claim 1, wherein the jig includes a clamping jaw to clamp the extension rod and a connection block connected to the second connection plate.
7. The preform extension apparatus tension testing mechanism of claim 6, wherein the second connecting plate has a first connecting end and a second connecting end opposite to the first connecting end, the first connecting plate being located at the first connecting end, and the connecting block being located at the second connecting end.
8. The preform extension apparatus tension testing mechanism of claim 1, wherein the moving assembly further comprises a motor installed at one end of the lead screw and rotating the lead screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111549845.2A CN114199672A (en) | 2021-12-17 | 2021-12-17 | Prefabricated excellent extension equipment tension accredited testing organization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111549845.2A CN114199672A (en) | 2021-12-17 | 2021-12-17 | Prefabricated excellent extension equipment tension accredited testing organization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114199672A true CN114199672A (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111549845.2A Pending CN114199672A (en) | 2021-12-17 | 2021-12-17 | Prefabricated excellent extension equipment tension accredited testing organization |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2447400C1 (en) * | 2010-11-11 | 2012-04-10 | Государственное образовательное учреждение высшего профессионального образования "Сибирская государственная геодезическая академия" (ГОУВПО "СГГА") | Device to measure displacement and deformation |
| CN102680321A (en) * | 2012-05-18 | 2012-09-19 | 河海大学 | Lever-type drawing device for testing anchoring performance of planting bar and implementation method thereof |
| CN203502299U (en) * | 2013-09-23 | 2014-03-26 | 清华大学苏州汽车研究院（相城） | Tensile force transducer |
| CN206683954U (en) * | 2017-03-31 | 2017-11-28 | 西南交通大学 | Fiber tensile test device |
| CN109540674A (en) * | 2018-12-12 | 2019-03-29 | 南京吉隆光纤通信股份有限公司 | A kind of fiber strength test device |
| CN211170458U (en) * | 2019-11-22 | 2020-08-04 | 青海中利光纤技术有限公司 | Stretching device of optical fiber perform |
| CN212301124U (en) * | 2020-05-29 | 2021-01-05 | 东莞市越铧电子科技有限公司 | Multistation tensile testing mechanism with antidetonation function |
-
2021
- 2021-12-17 CN CN202111549845.2A patent/CN114199672A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2447400C1 (en) * | 2010-11-11 | 2012-04-10 | Государственное образовательное учреждение высшего профессионального образования "Сибирская государственная геодезическая академия" (ГОУВПО "СГГА") | Device to measure displacement and deformation |
| CN102680321A (en) * | 2012-05-18 | 2012-09-19 | 河海大学 | Lever-type drawing device for testing anchoring performance of planting bar and implementation method thereof |
| CN203502299U (en) * | 2013-09-23 | 2014-03-26 | 清华大学苏州汽车研究院（相城） | Tensile force transducer |
| CN206683954U (en) * | 2017-03-31 | 2017-11-28 | 西南交通大学 | Fiber tensile test device |
| CN109540674A (en) * | 2018-12-12 | 2019-03-29 | 南京吉隆光纤通信股份有限公司 | A kind of fiber strength test device |
| CN211170458U (en) * | 2019-11-22 | 2020-08-04 | 青海中利光纤技术有限公司 | Stretching device of optical fiber perform |
| CN212301124U (en) * | 2020-05-29 | 2021-01-05 | 东莞市越铧电子科技有限公司 | Multistation tensile testing mechanism with antidetonation function |
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