CN112432847B - Clamp suitable for stretching of cord - Google Patents
Clamp suitable for stretching of cord Download PDFInfo
- Publication number
- CN112432847B CN112432847B CN202011312906.9A CN202011312906A CN112432847B CN 112432847 B CN112432847 B CN 112432847B CN 202011312906 A CN202011312906 A CN 202011312906A CN 112432847 B CN112432847 B CN 112432847B
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- clamping
- cord
- upper cover
- screw
- lower ball
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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
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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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
A clamp suitable for stretching a cotton rope comprises a clamping end, an upper cover, a lower ball, a level gauge, a fixing screw rod, a fixing nut, a clamping block, a clamping screw rod, a pre-tightening screw and a pre-tightening plate; the clamping end is provided with a level gauge, and a screw hole on the clamping end is unthreaded; the upper screw hole on the clamping end is used for positioning the upper cover, and the lower screw hole on the clamping end is used for positioning the lower ball; the upper cover is provided with a transition groove and is fixed in an upper screw hole on the clamping end through a fixing screw rod; the lower ball is matched with the upper cover for use, a tiny groove is formed in the surface of the lower ball, the diameter of the groove is larger than that of the cord, and the lower ball and the upper cover are fixed through a fixing screw and a fixing nut; the pre-tightening plate is matched with the pre-tightening screw for use, the pre-tightening plate has elasticity, and the pre-tightening plate rotates around the pre-tightening screw; the clamping block is clamped in the lower ball, the cord penetrates through the hole of the clamping block to be fixed, and the clamping block is fixed by the clamping screw after the fixing is finished. The invention avoids accidental damage to the jaw type structure clamp caused by repeated disassembly and assembly of the jaw type structure clamp.
Description
Technical Field
The invention belongs to the field of test tensile clamps, and particularly relates to a tensile clamp.
Background
In the field of material tensile test, when a sample is clamped, the sample must be reliably clamped, so that the sample is prevented from slipping, and the integrity of the test is ensured. After the test stretching is finished, the mechanical parameters of the material, such as elastic modulus, yield strength, tensile strength, elongation and the like, can be accurately measured.
At present, most of tensile clamps of a material testing machine are clamps with a jaw-type structure, and the clamps of the type are suitable for dumbbell-type standard samples or strip-type samples, but not suitable for linear samples such as steel wires and ropes or rope samples. The rope sample clamped by the clamp with the jaw type structure is used, when a tensile test is carried out, the breaking position of the rope sample always appears in a clamping area of the jaw, and the primary analysis reason is as follows: the cord in this position is held by the jaws and deforms, causing the position to break prematurely. The real strength of the rope sample cannot be reflected due to the premature breakage of the rope sample, so that the experimental result is unreliable.
Therefore, a clamp suitable for stretching the rope sample is needed to be designed, the clamping condition of the rope sample is improved, the rope sample is not broken in advance during stretching, and the real strength of the rope sample is measured.
Disclosure of Invention
The invention provides a clamp suitable for stretching a wire rope, which aims to measure the real strength of a wire rope sample and avoid premature fracture. The clamp can be directly clamped in the jaw of the jaw type structure clamp, so that the jaw type structure clamp is prevented from being repeatedly disassembled and assembled, and the jaw type structure clamp is prevented from causing accidental damage.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a clamp suitable for stretching a cord comprises a clamping end, an upper cover, a lower ball, a level gauge, a fixing screw, a fixing nut, a clamping block, a clamping screw, a pre-tightening screw and a pre-tightening plate;
the clamping end is directly clamped in a jaw of the jaw type structure clamp, and a level gauge is arranged on the clamping end and used for horizontally adjusting the clamp; the screw hole on the clamping end has no thread and plays a role in positioning; the upper screw hole on the clamping end is used for positioning the upper cover, and the lower screw hole on the clamping end is used for positioning the lower ball;
the curved surface of the transition area of the upper cover is in transition by using a tangent line, the upper cover is provided with a transition groove for guiding the cord so that the cord is vertically stretched in the middle area when being stretched, and the upper cover is fixed in an upper screw hole on the clamping end through a fixing screw rod; the lower ball and the upper cover are matched for use, a micro groove is formed in the surface of the lower ball, the diameter of the groove is larger than that of the cord, the groove is used for guiding the cord to be wound, and the lower ball and the upper cover are fixed through a fixing screw rod and a fixing nut;
the pre-tightening plate is matched with the pre-tightening screw for use, the pre-tightening plate has elasticity, and the pre-tightening plate rotates around the pre-tightening screw and is used for pre-tightening the wire rope sample; the clamping block is clamped in the lower ball and used for fixing a cord, the cord penetrates through a hole of the clamping block to be fixed, and the clamping block is fixed by a clamping screw after the fixing is finished.
Furthermore, the upper cover is designed by adopting a circular arc with large curvature radius.
The invention has the following beneficial effects: the cord is wound on the whole circle, so that the cord is not greatly deformed and wound, and then the cord is transited to the surface of the upper cover through the tangent arc, and the cord is not greatly deformed in the whole clamping process. The clamp can be directly clamped in a jaw type structure clamp of a material testing machine, the jaw type structure clamp does not need to be frequently disassembled, and the clamping is convenient. After the stretching is finished, the rope clamp does not need to be taken down, and the next sample can be directly clamped for carrying out the tensile test. After the experiment is completed, the jaw type clamp is loosened, the cord clamp can be taken down, and the operation process is simple and easy to operate.
Drawings
Fig. 1 is a front view of the overall structure of the present invention.
Fig. 2 is an exploded view of a portion of the structure of the present invention.
Fig. 3 is a schematic view of the upper cover of the present invention.
Fig. 4 is a schematic view of the present invention showing the lower ball.
FIG. 5 is an assembly view of the upper cover and the lower ball of the present invention.
Fig. 6 is a schematic diagram of a cord clamp of the present invention.
The device comprises a clamping end 1, a fixing nut 2, a thread rope 3, a fixing screw rod 4, an upper cover 5, a lower ball 6, a clamping block 7, a clamping screw rod 8, a level gauge 9, a pre-tightening screw 10 and a pre-tightening plate 11.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1-6, a clamp suitable for stretching a cord comprises a clamping end 1, a fixing nut 2, a cord 3, a fixing screw rod 4, an upper cover 5, a lower ball 6, a clamping block 7, a clamping screw rod 8, a level gauge 9, a pre-tightening screw 10 and a pre-tightening plate 11, wherein the clamping end 1 is directly clamped in a jaw of a jaw-type structure clamp, so that the jaw clamp on a material testing machine can be prevented from being frequently disassembled, and the jaw clamp can be prevented from being accidentally damaged due to repeated disassembly. The clamping end 1 is provided with a level gauge 9 for horizontal adjustment of the whole clamp, and an upper screw hole in the clamping end 1 is used for positioning an upper cover 5 and is fixed through a fixing screw rod 4 and a fixing nut 2. The lower screw hole on the clamping end 1 is used for positioning the lower ball 6, and the fixing position can be adjusted up and down for fastening the thread rope 3.
The schematic diagram of the upper cover 5 is shown in fig. 3, the surface of the upper cover 5 is designed by a circular arc with large curvature radius, the transition area is in tangent transition, and the upper cover 5 is provided with a transition groove for guiding the cord 3 to be in the middle area when the cord is stretched and to be vertically stretched.
The schematic view of the lower ball 6 is shown in fig. 4, the lower ball 6 is fixed with the upper cover 5 through the fixing screw 4 and the fixing nut 2, and a tiny groove is formed in the surface of the lower ball and used for guiding the winding of the thread rope.
The pre-tightening plate 11 is matched with the pre-tightening screw 10 for use, the pre-tightening plate 11 has certain elasticity, can be directly pulled up to rotate around the pre-tightening screw 10, and is used for performing preliminary pre-tightening on a wire rope sample and preventing the wound wire rope 3 from loosening.
The clamping block 7 is clamped in the lower ball 6 and used for fixing the cord 3, the cord 3 penetrates through a hole of the clamping block 7 to be fixed, and the clamping block 7 is fixed by the clamping screw 8 after the fixing is finished.
The use method of the invention comprises the following steps:
sample clamping: the cord 3 is clamped in the hole of the clamping block 7, and the clamping block 7 is fixed by the clamping screw 8. The cord 3 is wound in accordance with the groove on the surface of the lower ball 6, and is preliminarily pre-tightened by using a pre-tightening plate 11 and a pre-tightening screw 10. The upper cover 5 and the lower ball 6 are installed in a matched mode, the thread rope 3 is clamped in the middle area of the upper cover 5, and the upper cover 5 and the lower ball 6 are fixed through the fixing screw rod 4 and the fixing nut 2. Through set screw 4 and fixation nut 2, be fixed in holder 1 with upper cover 5 and ball 6 down, with holder 1 dress clamp in the anchor clamps of keeping silent on the material testing machine, judge whether the cotton rope anchor clamps clamping is horizontal through spirit level 9. And clamping the other end of the wire rope by using the same method.
And (3) stretching a test sample: the test specimens were stretched using a materials testing machine.
Sample disassembly: and (3) loosening the fixing screw rod 4 and the fixing nut 2 between the upper cover 5 and the lower ball 6, loosening the clamping screw rod 8, pulling the pre-tightening plate 11 and rotating, and taking down the wire rope 3.
And (3) clamping again: clamping the cord 3, fastening the clamping screw 8, rotating the pre-tightening plate 11, and fastening the fixing screw 4 between the upper cover 9 and the lower top 8. And finishing clamping one end of the cord, and repeating the operations at the other end of the cord.
And (4) finishing the test: and releasing the fixing screw rod 4 between the upper cover 5 and the lower ball 6, releasing the clamping screw rod 8, pulling the pre-tightening plate 11 and rotating, and taking down the wire rope 3. And loosening the jaw type clamp, and taking down the cord stretching clamp.
The clamp can avoid direct clamping of the cord and the jaw-type structure clamp, and the cord is wound on the whole circle and the arc with large curvature radius, so that the cord is not greatly deformed in the clamping process. The whole clamp can be directly clamped in the jaw type clamp, multiple tests can be carried out through one-time clamping of the clamp, and the clamp does not need to be disassembled again. In summary, the stretching clamp is a clamp suitable for stretching a string.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the examples but encompasses equivalent technical means as would be appreciated by those skilled in the art based on the inventive concept.
Claims (1)
1. The clamp suitable for stretching the cord is characterized by comprising a clamping end, an upper cover, a lower ball, a level gauge, a fixing screw rod, a fixing nut, a clamping block, a clamping screw rod, a pre-tightening screw and a pre-tightening plate;
the clamping end is directly clamped in a jaw of the jaw type structure clamp, and a level gauge is arranged on the clamping end and used for horizontally adjusting the clamp; the screw hole on the clamping end has no thread and plays a role in positioning; the upper screw hole on the clamping end is used for positioning the upper cover, and the lower screw hole on the clamping end is used for positioning the lower ball;
the surface of the upper cover is designed by adopting a circular arc with large curvature radius, a transition area is in tangent transition, the upper cover is provided with a transition groove for guiding a cord so that the cord is vertically stretched in a middle area when being stretched, and the upper cover is fixed in an upper screw hole on the clamping end through a fixing screw rod; the lower ball and the upper cover are matched for use, a micro groove is formed in the surface of the lower ball, the diameter of the groove is larger than that of the cord, the groove is used for guiding the cord to be wound, and the lower ball and the upper cover are fixed through a fixing screw rod and a fixing nut;
the pre-tightening plate is matched with the pre-tightening screw for use, the pre-tightening plate has elasticity, and the pre-tightening plate rotates around the pre-tightening screw and is used for pre-tightening the wire rope sample; the clamping block is clamped in the lower ball and used for fixing a cord, the cord penetrates through a hole of the clamping block to be fixed, and after the cord is fixed, the clamping block is fixed through a clamping screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011312906.9A CN112432847B (en) | 2020-11-20 | 2020-11-20 | Clamp suitable for stretching of cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011312906.9A CN112432847B (en) | 2020-11-20 | 2020-11-20 | Clamp suitable for stretching of cord |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112432847A CN112432847A (en) | 2021-03-02 |
| CN112432847B true CN112432847B (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011312906.9A Active CN112432847B (en) | 2020-11-20 | 2020-11-20 | Clamp suitable for stretching of cord |
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| Country | Link |
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| CN (1) | CN112432847B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161864B (en) * | 2020-08-27 | 2024-05-14 | 西安泰力松新材料股份有限公司 | Stretching clamp for special-shaped section wire and use method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060116707A (en) * | 2006-05-04 | 2006-11-15 | 임기영 | For filling a cord length adjustment device of connector |
| CN102830013A (en) * | 2012-08-21 | 2012-12-19 | 无锡通用钢绳有限公司 | Clamping device of steel wire rope tension tester |
| TWI490488B (en) * | 2013-03-29 | 2015-07-01 | Nat Inst Chung Shan Science & Technology | Wire-clipping device |
| CN104390851A (en) * | 2014-11-11 | 2015-03-04 | 济南瑞晟机械有限公司 | Coaxiality-adjustable winding type tensile fixture |
| CN105021454B (en) * | 2015-08-12 | 2017-12-26 | 天津大学 | A kind of micron order sized samples tension-torsion experiment on fatigue properties fixture |
| CN205209875U (en) * | 2015-11-30 | 2016-05-04 | 衡阳金化高压容器股份有限公司 | CNG gas cylinder winding fibre tensile test anchor clamps |
| CN105758718B (en) * | 2016-04-19 | 2018-07-31 | 镇江市建科工程质量检测中心有限公司 | A kind of fixture and the detection device with the fixture |
| CN206504944U (en) * | 2017-01-20 | 2017-09-19 | 天津赛达鑫源检验检测有限公司 | Wound type steel cord stretching clamp |
| CN208383595U (en) * | 2018-07-11 | 2019-01-15 | 石家庄科佳建筑工程技术有限公司 | A kind of plastic material tensile test fixture |
| CN109765099A (en) * | 2019-01-21 | 2019-05-17 | 成都海蓉特种纺织品有限公司 | A kind of fabric tension performance measurement method |
| CN210465126U (en) * | 2019-08-26 | 2020-05-05 | 江苏容大材料腐蚀检验有限公司 | Steel wire rope stretching device adopting winding method |
| CN210604154U (en) * | 2019-08-28 | 2020-05-22 | 湖北楚天卓越工程技术有限公司 | Clamping fixture for testing tensile property of steel wire rope |
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2020
- 2020-11-20 CN CN202011312906.9A patent/CN112432847B/en active Active
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| Publication number | Publication date |
|---|---|
| CN112432847A (en) | 2021-03-02 |
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