CN111693363A - Fastener tensile test of quick clamping assists utensil - Google Patents
Fastener tensile test of quick clamping assists utensil Download PDFInfo
- Publication number
- CN111693363A CN111693363A CN202010698188.7A CN202010698188A CN111693363A CN 111693363 A CN111693363 A CN 111693363A CN 202010698188 A CN202010698188 A CN 202010698188A CN 111693363 A CN111693363 A CN 111693363A
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- Prior art keywords
- sleeve
- bolt
- head
- quick
- connecting piece
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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
- 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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- 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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- 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 rapidly-clamped fastener tensile test assistive tool, which comprises a bolt sleeve, an upper quick-mounting device, a bolt anti-pulling head and a lower quick-mounting device, wherein the upper end of the bolt sleeve is connected with the upper pulling head of a testing machine through the upper quick-mounting device, and the bolt anti-pulling head is connected with the lower pulling head of the testing machine through the lower quick-mounting device; a limiting hole is formed in the center of the lower end of the bolt sleeve and used for limiting the head of the bolt, a threaded hole is formed in the bolt tensile head corresponding to the limiting hole and used for connecting the rod part of the bolt; the invention has the advantages of convenient, accurate and quick operation, high universality and capability of making up the problem that the universal material testing machine cannot be directly used for testing.
Description
Technical Field
The invention belongs to an auxiliary tool for bolt test detection, and particularly relates to a quick-clamping auxiliary tool for a fastener tensile test.
Background
In the production of threaded fasteners, the mechanical properties of the fastener are an important performance criterion. In production, a tensile test is carried out on the threaded fastener to check whether the fastener meets the mechanical property. The mechanical property test is carried out by a tensile tester.
Adopt tensile testing machine to experimental threaded fastener, mainly have following not enough: 1) clamping can not be carried out: the upper and lower chucks of the existing testing machine can only carry out the clamping test of the standard sample piece regulated by the state, and the existing testing machine has limitation on the rod-shaped bolt with a certain shape. For example, the hexagonal head gasket-penetrating bolt cannot clamp the head because the head of the bolt is provided with a gasket; 2) the stretching direction is not perpendicular to the bolt support surface: according to the use requirement of the threaded fastener, the tensile direction of the tensile test required force is perpendicular to the bolt supporting surface, and the direction of the tensile force cannot be guaranteed to be perpendicular to the supporting surface by clamping with a chuck.
Disclosure of Invention
The invention provides a fastener tensile test auxiliary tool capable of being clamped quickly, and solves the problems that a chuck cannot clamp a bolt and the detection accuracy is low in an existing testing machine.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a utensil is assisted in fastener tensile test of quick clamping which characterized in that: the testing machine comprises a bolt sleeve, an upper quick-mounting device, a bolt anti-pulling head and a lower quick-mounting device, wherein the upper end of the bolt sleeve is connected with the upper pulling head of the testing machine through the upper quick-mounting device, and the bolt anti-pulling head is connected with the lower pulling head of the testing machine through the lower quick-mounting device; the bolt sleeve is characterized in that a limiting hole is formed in the center of the lower end of the bolt sleeve and used for limiting the head of the bolt, a threaded hole is formed in the bolt tensile head corresponding to the limiting hole and used for connecting the rod portion of the bolt.
Further inject above-mentioned technical scheme, go up the fast-assembling ware and include connecting piece, last semicircle cover, go up sleeve, thread head, go up the upper end of connecting piece and adopt threaded construction with the last pull head of testing machine to be connected, the lower extreme of going up the connecting piece is spacing in the upper end of last semicircle cover, the upper end of thread head is spacing in the lower extreme of last semicircle cover, can press from both sides tight connecting piece and thread head after going up sleeve and last semicircle cover interference fit, the lower extreme and the bolt sleeve of thread head adopt threaded construction to be connected.
The technical scheme is further limited, and the upper sleeve and the upper semicircular sleeve are in interference fit through a conical surface.
The technical scheme is further limited, the lower quick assembling device comprises a lower connecting piece, a lower semicircular sleeve and a lower sleeve, the lower end of the lower connecting piece is connected with a lower pull head of the testing machine through a threaded structure, the upper end of the lower connecting piece is limited in the lower end of the lower semicircular sleeve, the lower end of the bolt anti-pulling head is limited in the upper end of the lower semicircular sleeve, and the lower connecting piece and the bolt anti-pulling head can be clamped after the lower sleeve is in interference fit with the lower semicircular sleeve.
The technical scheme is further limited, and the lower sleeve and the lower semi-circular sleeve are in interference fit through the conical surface.
Has the advantages that: the support plane of the bolt sleeve is in contact, positioned and supported fit with the lower end face of the bolt head so as to ensure that the axial direction of the bolt extends along the vertical direction and ensure the result; by adding the quick assembling device, the existing testing machine can be changed into a testing machine special for the bolt, and the clamping of a piece to be tested is facilitated; the invention has the advantages of convenient, accurate and quick operation, high universality and capability of making up the problem that the universal material testing machine cannot be directly used for testing.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in fig. 1, a fastener tensile test assistive device for quick clamping comprises a bolt sleeve 1, an upper quick coupler 2, a bolt anti-pulling head 3 and a lower quick coupler 4, wherein the upper end of the bolt sleeve is connected with an upper pulling head 5 of a testing machine through the upper quick coupler, and the bolt anti-pulling head is connected with a lower pulling head 6 of the testing machine through the lower quick coupler; a limiting hole is formed in the center of the lower end of the bolt sleeve and used for limiting the head of the bolt, a threaded hole is formed in the bolt tensile head corresponding to the limiting hole and used for connecting the rod part of the bolt;
as shown in fig. 1, the upper quick coupler 2 includes an upper connector 201, an upper semicircular sleeve 202, an upper sleeve 203, and a screw head 204, the upper end of the upper connector is connected with the upper puller of the testing machine by a screw structure, a lower end boss of the upper connector is limited in the upper end of the upper semicircular sleeve, an upper end boss of the screw head is limited in the lower end of the upper semicircular sleeve, the upper connector and the screw head can be clamped after the upper sleeve is in interference fit with the upper semicircular sleeve, that is, the upper connector, the upper semicircular sleeve, the upper sleeve, and the screw head form an integrated structure, and the lower end of the screw head is connected with the bolt sleeve by a screw structure; the advantages of this structure are: 1) the threaded connection mode has the functions of convenient assembly and disassembly and distance adjustment; 2) the semicircular sleeve is as follows: the round table is axially cut to be a half, the cross section of the round table is semicircular, and a limiting cavity is arranged in the semicircular table, so that quick limiting can be realized; 3) the upper sleeve and the upper semicircular sleeve realize interference fit through the conical surface, namely the cylindrical cavity surface (conical surface) of the upper sleeve is matched with the outer side surface of the upper semicircular sleeve, so that rapid clamping is realized; 4) the connecting piece or the thread head can be replaced according to the length of the part, so that the bolt testing machine can adapt to bolts with different lengths for testing, and has high universality;
as shown in fig. 1, the lower quick coupler 4 comprises a lower connecting piece 401, a lower semicircular sleeve 402 and a lower sleeve 403, the lower end of the lower connecting piece is connected with a lower pull head of the testing machine by adopting a threaded structure, the upper end of the lower connecting piece is limited in the lower end of the lower semicircular sleeve, the lower end of a bolt anti-pull head is limited in the upper end of the lower semicircular sleeve, and the lower connecting piece and the bolt anti-pull head can be clamped after the lower sleeve is in interference fit with the lower semicircular sleeve; 1) the threaded connection mode has the functions of convenient assembly and disassembly and distance adjustment; 2) the semicircular sleeve is as follows: the round table is axially cut to be a half, the cross section of the round table is semicircular, and a limiting cavity is arranged in the semicircular table, so that quick limiting can be realized; 3) the lower sleeve and the lower semicircular sleeve realize interference fit through the conical surface, namely, the cylindrical cavity surface (conical surface) of the upper sleeve is matched with the outer side surface of the lower semicircular sleeve, so that rapid clamping is realized.
Description of the invention: when the bolt is tested, the original chuck on the testing machine is disassembled, and the auxiliary tool is replaced as follows: 1) the upper end of the upper connecting piece is connected with an upper pull head of the testing machine, an upper sleeve is sleeved on the upper connecting piece, the lower end of the upper connecting piece and the upper end of the threaded head are clamped in the upper semicircular sleeve, and the upper sleeve is put down to be in interference fit with the upper semicircular sleeve; 2) the lower end of the lower connecting piece is connected with a lower pull head of the testing machine, the upper end of the lower connecting piece is clamped in the upper semicircular sleeve, and the lower sleeve is arranged to be in interference fit with the lower semicircular sleeve; 3) selecting a proper bolt sleeve, installing the bolt 7 to be measured into the bolt sleeve, connecting the threaded end of the bolt with a bolt tensile head, and enabling the screwing length to be not less than one thread diameter length; 4) connecting the threaded end of the bolt sleeve with the threaded head; 5) the sleeve on the lower semicircular sleeve is lifted upwards, and the lower semicircular sleeve is loosened; adjusting a lifting system of the testing machine, clamping the other end of the bolt anti-pulling head into the lower semicircular sleeve, putting down the sleeve on the lower semicircular sleeve, and enabling the bolt, the bolt anti-pulling head and the lower connecting piece to be in contact with each other by screwing the bolt, the bolt anti-pulling head and the lower connecting piece to prevent the bolt from penetrating up and down; 6) a tensile test was performed.
Where not described in detail in this specification, the structures are clearly shown in the drawings or are known in the art.
Claims (5)
1. The utility model provides a utensil is assisted in fastener tensile test of quick clamping which characterized in that: the testing machine comprises a bolt sleeve, an upper quick-mounting device, a bolt anti-pulling head and a lower quick-mounting device, wherein the upper end of the bolt sleeve is connected with the upper pulling head of the testing machine through the upper quick-mounting device, and the bolt anti-pulling head is connected with the lower pulling head of the testing machine through the lower quick-mounting device; the bolt sleeve is characterized in that a limiting hole is formed in the center of the lower end of the bolt sleeve and used for limiting the head of the bolt, a threaded hole is formed in the bolt tensile head corresponding to the limiting hole and used for connecting the rod portion of the bolt.
2. The rapidly-clamped fastener tensile test assistive device according to claim 1, characterized in that: the upper quick assembling device comprises an upper connecting piece, an upper semicircular sleeve, an upper sleeve and a threaded head, the upper end of the upper connecting piece is connected with an upper pull head of the testing machine through a threaded structure, the lower end of the upper connecting piece is limited in the upper end of the upper semicircular sleeve, the upper end of the threaded head is limited in the lower end of the upper semicircular sleeve, the upper connecting piece and the threaded head can be clamped after the upper sleeve and the upper semicircular sleeve are in interference fit, and the lower end of the threaded head is connected with the bolt sleeve through a threaded structure.
3. The rapidly-clamped fastener tensile test assistive device according to claim 2, characterized in that: the upper sleeve and the upper semicircular sleeve are in interference fit through the conical surface.
4. The quick-clamping fastener tensile test assistive device according to claim 1 or 2, characterized in that: the lower quick assembling device comprises a lower connecting piece, a lower semicircular sleeve and a lower sleeve, the lower end of the lower connecting piece is connected with a lower pull head of the testing machine through a threaded structure, the upper end of the lower connecting piece is limited in the lower end of the lower semicircular sleeve, the lower end of the bolt anti-pull head is limited in the upper end of the lower semicircular sleeve, and the lower sleeve can clamp the lower connecting piece and the bolt anti-pull head after being in interference fit with the lower semicircular sleeve.
5. The rapidly-clamped fastener tensile test assistive device according to claim 4, characterized in that: the lower sleeve and the lower semi-circular sleeve are in interference fit through the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698188.7A CN111693363A (en) | 2020-07-20 | 2020-07-20 | Fastener tensile test of quick clamping assists utensil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698188.7A CN111693363A (en) | 2020-07-20 | 2020-07-20 | Fastener tensile test of quick clamping assists utensil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111693363A true CN111693363A (en) | 2020-09-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010698188.7A Pending CN111693363A (en) | 2020-07-20 | 2020-07-20 | Fastener tensile test of quick clamping assists utensil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111693363A (en) |
-
2020
- 2020-07-20 CN CN202010698188.7A patent/CN111693363A/en active Pending
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