CN201607369U - Unit for measuring circumferential mechanical property of thin tube - Google Patents
Unit for measuring circumferential mechanical property of thin tube Download PDFInfo
- Publication number
- CN201607369U CN201607369U CN2010201091772U CN201020109177U CN201607369U CN 201607369 U CN201607369 U CN 201607369U CN 2010201091772 U CN2010201091772 U CN 2010201091772U CN 201020109177 U CN201020109177 U CN 201020109177U CN 201607369 U CN201607369 U CN 201607369U
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- Prior art keywords
- protective sleeve
- conical indenter
- conical
- external diameter
- lobe
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Abstract
The utility model discloses a unit for measuring circumferential mechanical property of a thin tube, which comprises a conical pressing head, a valve mold and a protective sheath. The valve mold is located in the measured tube. The conical pressing head is located in the valve mold and is located in the protecting sheath. The largest internal diameter of the protecting sheath and the platform external diameter of the conical pressing head are in a clearance fit. The half-cone angle of the taper of the squeezed-bulge work end for the conical pressing head is of 8 degrees or 12 degrees or 15 degrees. The valve mold comprises a plurality of mold valves with the identical shape and structure. The diameter of one end of the protective sheath internal hole is identical to the external diameter of the matched platform of the conical pressing head, the hole diameter of the middle part is larger than the external diameter of the measured tube, and the hole diameter of the other end is larger than the external diameter of the conical end of the conical pressing head that is matched with the hole diameter, so as to lead the conical end of the conical pressing head not to interfere with the protective sheath after being installed in the internal hole. The unit provided by the utility model converts the axial pressure into radial bulging force during loading on a material mechanics property test machine, accurately obtains the truthful circumferential mechanical property, thereby providing precise mechanics property support for design and engineering application of follow-up thin-wall tubes.
Description
Technical field
The present invention relates to the field tests of material mechanical performance, specifically is a kind of device of testing thin-wall pipe circumferential mechanical performance.
Background technology
Relate to the use of pipe fitting, pipe box invariably in fields such as Aeronautics and Astronautics, automobile, plant equipment.With the aircraft is example, and pipe system is the lifeline of aircraft, and its performance quality directly has influence on the overall performance of aircraft.Therefore improve the technical merit of pipe system, extremely important to improving aeroplane performance.Fluid pressure line is the part that working pressure is the highest, reliability requirement is the tightest in all pipelines of aircraft, and the height of aircraft pipe system technology just embodies a concentrated reflection of in the hydraulic plumbing system.For hydraulic system, under equal power condition, working pressure is high more, desired moving tube and oil pump piston floorage are just more little, piping flow also requires more little, thereby the overall dimensions of hydraulic system can reduce, and weight can alleviate, and lower velocity of medium has also reduced the power loss that flows in pipeline.Therefore, hydraulic system and standard component technical research thereof are the objective demands of aircraft industry development.Because the raising of operating hydraulic line pressure will bring many new problems to Design of Hydraulic System, mainly be summed up as intensity and sealing two large problems, this just needs the strength problem of research pipe fitting.
Traditional approach be with thin walled tube cut open, flattening-out, prepare the circumferential mechanical performance of test pipe fitting behind the tensile sample.But distortion once more appears in the process of flattening-out, so the data that record just can not be represented the circumferential mechanical performance number of pipe fitting exactly, still more for the small size thin-wall pipe just can't cut open at all, flattening-out, and sample preparation.
Summary of the invention
For overcoming the drawback that is difficult to accurately record thin-wall pipe circumferential mechanical performance in the art methods, the present invention proposes a kind of device of testing thin-wall pipe circumferential mechanical performance.
The present invention includes conical indenter, lobe mould and protective sleeve; The lobe mould places tested pipe fitting, and clearance fit between the two; Conical indenter is positioned at the lobe mould, places in the lump in the protective sleeve; Clearance fit between the platform external diameter of the maximum inner diameter of protective sleeve and conical indenter.One end of conical indenter is the cooperation platform that contacts with material mechanical performance testing machine pressure head, the crowded working end of expanding of other end taper; The semi-cone angle that conical indenter squeezes the working end tapering that expands is 8 ° or 10 ° or 12 ° or 15 °.Cooperate the maximum inner diameter of the external diameter of platform on the conical indenter with protective sleeve.
Described lobe mould is made up of all identical mould lobe of many lobes profile and structure; Lobe mould after the combination is a hollow cylindrical, and its endoporus is taper, and this inner conical is identical with the tapering of conical indenter; Distinguish the mounting groove of flexible circle at the external peripheral surface at each lobe mould lobe two ends; Lobe mould external diameter is with the internal diameter that is squeezed the test pipe fitting that expands, highly with the height that is squeezed the test pipe fitting that expands.
The stepped hole of the endoporus of described protective sleeve for connecting; The aperture of protective sleeve one end endoporus cooperates the external diameter of platform with conical indenter; The aperture of protective sleeve middle part endoporus is greater than tested pipe fitting external diameter 6mm～12mm; The aperture of the protective sleeve other end is greater than the external diameter of the conical indenter tapering point that cooperates with it, the tapering point of conical indenter packed into do not interfere with protective sleeve behind this endoporus.
The present invention has utilized the pyramidal structure characteristics in the device and the splitted structure characteristics of lobe mould, realized on the material mechanical performance testing machine in the stand under load process axle pressure is converted to bulging power radially, play the direction of transfer of change power, thereby realize bulging, solved the Mechanics Performance Testing of thin-walled small size pipe fitting thin-wall pipe.Compare with existing proving installation, this device can directly be measured thin-wall pipe, will thin walled tube cut open, flattening-out, and the circumferential mechanical performance of preparing test pipe fitting behind the tensile sample is to satisfy existing proving installation to specimen size requirement.Simultaneously, test result has also eliminated the test error that brings in the specimen preparation process, has improved measuring accuracy.Along with this proving installation is further applied, can accurately obtain the real circumferential mechanical performance of thin-wall pipe, thereby provide accurate mechanical property support the design and the engineering application of follow-up thin-wall pipe, therefore can improve Engineering Reliability.
Description of drawings
Accompanying drawing 1 is the structural representation of pipe fitting circumferential stress proving installation;
Accompanying drawing 2 is the stressed synoptic diagram of proving installation;
Accompanying drawing 3 is lobe mould front views;
Accompanying drawing 4 is lobe mould vertical views;
Accompanying drawing 6 is protective sleeve front views;
Accompanying drawing 7 is that the A of protective sleeve is to view.Wherein:
1. conical indenter 2. lobe moulds 3. thin-wall pipes 4. protective sleeves 5. elastic rings
Embodiment
Embodiment one
Present embodiment is a kind of device of test 7050 high strength alumin ium alloy pipe fitting circumferential mechanical performances.Specifically being of a size of of test specimen
Highly be 20mm.
Present embodiment comprises conical indenter 1, lobe mould 2 and protective sleeve 4.Conical indenter 1 and lobe mould 2 all adopt the Cr12Mo1V1 steel to make, and protective sleeve 4 adopts the 45# steel to make.Lobe mould 2 is positioned in the tested pipe fitting 3, and clearance fit between the two.Conical indenter 1 is positioned at lobe mould 2, places in the lump in the protective sleeve 4.Clearance fit between the platform external diameter of the maximum inner diameter of protective sleeve and conical indenter.
Conical indenter 1 is a solid of revolution, and its profile is " T " font.Conical indenter 1 one ends are the cooperation platform that contacts with material mechanical performance testing machine pressure head, and this cooperates the maximum inner diameter of the external diameter of platform with protective sleeve 4, and in the present embodiment, the diameter of this platform is
Height is 7mm.The tapered rod that reducing is arranged at end face center of conical indenter 1 platform has formed the bloated working end of squeezing of conical indenter 1; The semi-cone angle that conical indenter 1 squeezes the working end tapering that expands is 8 °, and end diameter is
Shown in accompanying drawing 3 and accompanying drawing 4.Lobe mould 2 is made up of all identical mould lobe of pintongs profile and structure; At the external peripheral surface at each the lobe mould lobe two ends mounting groove of flexible circle 5 respectively, each piece mould lobe is constrained to integral body by O type elastic ring 5.Lobe mould 2 after the combination is a hollow cylindrical, and its endoporus is taper, and this inner conical is identical with the tapering of conical indenter, also is 8 °.Lobe mould external diameter after the combination is with the internal diameter that is squeezed the test pipe fitting that expands, highly with the height that is squeezed the test pipe fitting that expands.
When utilizing the present embodiment proving installation to squeeze expand tube spare, drive conical indenter 1 by the material mechanical performance testing machine, conical indenter 1 is done axially-movable to the lower edge pipe fitting, thereby making conical indenter 1 drive lobe mould 2 radially outward struts, pipe fitting is squeezed the effect of expanding, at last with the pipe fitting spalling, thereby realize test to its circumferential mechanical performance.
Embodiment two
Present embodiment is a kind of device of test 7050 high strength alumin ium alloy pipe fitting circumferential mechanical performances.Specifically being of a size of of test specimen
Highly be 20mm.
Present embodiment comprises conical indenter 1, lobe mould 2 and protective sleeve 4.Conical indenter 1 and lobe mould 2 all adopt the Cr12Mo1V1 steel to make, and protective sleeve 4 adopts the 45# steel to make.Lobe mould 2 is positioned in the tested pipe fitting 3, and clearance fit between the two.Conical indenter 1 is positioned at lobe mould 2, places in the lump in the protective sleeve 4.Clearance fit between the platform external diameter of the maximum inner diameter of protective sleeve and conical indenter.
Conical indenter 1 is a solid of revolution, and its profile is " T " font.Conical indenter 1 one ends are the cooperation platform that contacts with material mechanical performance testing machine pressure head, and the external diameter of this platform is with the maximum inner diameter of protective sleeve 4, and in the present embodiment, the diameter of this platform is
Height is 7mm.The tapered rod that reducing is arranged at end face center of conical indenter 1 platform has formed the bloated working end of squeezing of conical indenter 1; The semi-cone angle that conical indenter 1 squeezes the working end tapering that expands is 10 °, and end diameter is
Shown in accompanying drawing 3 and accompanying drawing 4.Lobe mould 2 is made up of all identical mould lobe of five lobe profiles and structure; At the external peripheral surface at each the lobe mould lobe two ends mounting groove of flexible circle respectively, each piece mould lobe is constrained to integral body by O type elastic ring.Lobe mould 2 after the combination is a hollow cylindrical, and its endoporus is taper, and this inner conical is identical with the tapering of conical indenter, also is 10 °.Lobe mould external diameter after the combination is with the internal diameter that is squeezed the test pipe fitting that expands, highly with the height that is squeezed the test pipe fitting that expands.
When utilizing the present embodiment proving installation to squeeze expand tube spare, drive conical indenter 1 by the material mechanical performance testing machine, conical indenter 1 is done axially-movable to the lower edge pipe fitting, thereby making conical indenter 1 drive lobe mould 2 radially outward struts, pipe fitting is squeezed the effect of expanding, at last with the pipe fitting spalling, thereby realize test to its circumferential mechanical performance.
Embodiment three
Present embodiment is a kind of device of test 69111 high-strength steel pipe fitting circumferential mechanical performances.Specifically being of a size of of test specimen
Highly be 22mm.
Present embodiment comprises conical indenter 1, lobe mould 2 and protective sleeve 4.Conical indenter 1 and lobe mould 2 all adopt the Cr12Mo1V1 steel to make, and protective sleeve 4 adopts the 45# steel to make.Lobe mould 2 is positioned in the tested pipe fitting 3, and clearance fit between the two.Conical indenter 1 is positioned at lobe mould 2, places in the lump in the protective sleeve 4.Clearance fit between the platform external diameter of the maximum inner diameter of protective sleeve and conical indenter.
Conical indenter 1 is a solid of revolution, and its profile is " T " font.Conical indenter 1 one ends are the cooperation platform that contacts with material mechanical performance testing machine pressure head, and the external diameter of this platform is with the maximum inner diameter of protective sleeve 4, and in the present embodiment, the diameter of this platform is
Height is 7mm.The tapered rod that reducing is arranged at end face center of conical indenter 1 platform has formed the bloated working end of squeezing of conical indenter 1; The semi-cone angle that conical indenter 1 squeezes the working end tapering that expands is 12 °, and end diameter is
Shown in accompanying drawing 3 and accompanying drawing 4.Lobe mould 2 is made up of all identical mould lobe of five lobe profiles and structure; At the external peripheral surface at each the lobe mould lobe two ends mounting groove of flexible circle respectively, each piece mould lobe is constrained to integral body by O type elastic ring.Lobe mould 2 after the combination is a hollow cylindrical, and its endoporus is taper, and this inner conical is identical with the tapering of conical indenter, also is 12 °.Lobe mould external diameter after the combination is with the internal diameter that is squeezed the test pipe fitting that expands, highly with the height that is squeezed the test pipe fitting that expands.
When utilizing the present embodiment proving installation to squeeze expand tube spare, drive conical indenter 1 by the material mechanical performance testing machine, conical indenter 1 is done axially-movable to the lower edge pipe fitting, thereby making conical indenter 1 drive lobe mould 2 radially outward struts, pipe fitting is squeezed the effect of expanding, at last with the pipe fitting spalling, thereby realize test to its circumferential mechanical performance.
Embodiment four
Present embodiment is a kind of device that is used to test 69111 high-strength steel pipe fitting circumferential mechanical performances.Specifically being of a size of of test specimen
Highly be 25mm.
Present embodiment comprises conical indenter 1, lobe mould 2 and protective sleeve 4.Conical indenter 1 and lobe mould 2 all adopt the Cr12Mo1V1 steel to make, and protective sleeve 4 adopts the 45# steel to make.Lobe mould 2 is positioned in the tested pipe fitting 3, and clearance fit between the two.Conical indenter 1 is positioned at lobe mould 2, places in the lump in the protective sleeve 4.Clearance fit between the platform external diameter of the maximum inner diameter of protective sleeve and conical indenter.
Conical indenter 1 is a solid of revolution, and its profile is " T " font.Conical indenter 1 one ends are the cooperation platform that contacts with material mechanical performance testing machine pressure head, and the external diameter of this platform is with the maximum inner diameter of protective sleeve 4, and in the present embodiment, the diameter of this platform is
Height is 7mm.The tapered rod that reducing is arranged at end face center of conical indenter 1 platform has formed the bloated working end of squeezing of conical indenter 1; The semi-cone angle that conical indenter 1 squeezes the working end tapering that expands is 15 °, and end diameter is
Shown in accompanying drawing 3 and accompanying drawing 4.Lobe mould 2 is made up of all identical mould lobe of six lobe profiles and structure; At the external peripheral surface at each the lobe mould lobe two ends mounting groove of flexible circle respectively, each piece mould lobe is constrained to integral body by O type elastic ring.Lobe mould 2 after the combination is a hollow cylindrical, and its endoporus is taper, and this inner conical is identical with the tapering of conical indenter, also is 15 °.Lobe mould external diameter after the combination is with the internal diameter that is squeezed the test pipe fitting that expands, highly with the height that is squeezed the test pipe fitting that expands.
When utilizing the present embodiment proving installation to squeeze expand tube spare, drive conical indenter 1 by the material mechanical performance testing machine, conical indenter 1 is done axially-movable to the lower edge pipe fitting, thereby making conical indenter 1 drive lobe mould 2 radially outward struts, pipe fitting is squeezed the effect of expanding, at last with the pipe fitting spalling, thereby realize test to its circumferential mechanical performance.
Claims (6)
1. a device of testing thin-wall pipe circumferential mechanical performance is characterized in that, described circumferential mechanical property testing device of valve-model type thin-wall tube comprises conical indenter (1), lobe mould (2) and protective sleeve (4); Lobe mould 2 is positioned in the tested pipe fitting (3), and clearance fit between the two; Conical indenter (1) is positioned at lobe mould (2), places in the lump in the protective sleeve (4); Clearance fit between the platform external diameter of the maximum inner diameter of protective sleeve and conical indenter.
2. a kind of according to claim 1 device of testing thin-wall pipe circumferential mechanical performance is characterized in that, an end of conical indenter (1) is the cooperation platform that contacts with material mechanical performance testing machine pressure head, and the other end is the working end of expanding of squeezing of taper; The semi-cone angle that conical indenter (1) squeezes the working end tapering that expands is 8 ° or 10 ° or 12 ° or 15 °.
3. a kind of according to claim 1 device of testing thin-wall pipe circumferential mechanical performance is characterized in that, lobe mould (2) is made up of all identical mould lobe of many lobes profile and structure; The endoporus of the lobe mould (2) after the combination is taper, and this inner conical is identical with the tapering of conical indenter; Distinguish the mounting groove of flexible circle at the external peripheral surface at each lobe mould lobe two ends.
4. a kind of according to claim 1 device of testing thin-wall pipe circumferential mechanical performance is characterized in that, lobe mould external diameter is with the internal diameter that is squeezed the test pipe fitting that expands, highly with the height that is squeezed the test pipe fitting that expands.
5. a kind of according to claim 1 device of testing thin-wall pipe circumferential mechanical performance is characterized in that, the stepped hole of the endoporus of protective sleeve (4) for connecting; The same conical indenter in aperture (1) of protective sleeve (4) one end endoporus cooperates the external diameter of platform; The aperture of protective sleeve (4) middle part endoporus is greater than tested pipe fitting external diameter 6mm～12mm; The aperture of the protective sleeve other end is greater than the external diameter of conical indenter (1) tapering point that cooperates with it, the tapering point of conical indenter (1) packed into do not interfere with protective sleeve (4) behind this endoporus.
6. a kind of according to claim 1 device of testing thin-wall pipe circumferential mechanical performance is characterized in that, the maximum inner diameter of the same protective sleeve of external diameter (4) of the cooperation platform on the conical indenter (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201091772U CN201607369U (en) | 2010-02-04 | 2010-02-04 | Unit for measuring circumferential mechanical property of thin tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201091772U CN201607369U (en) | 2010-02-04 | 2010-02-04 | Unit for measuring circumferential mechanical property of thin tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201607369U true CN201607369U (en) | 2010-10-13 |
Family
ID=42952075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201091772U Expired - Lifetime CN201607369U (en) | 2010-02-04 | 2010-02-04 | Unit for measuring circumferential mechanical property of thin tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201607369U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793646B (en) * | 2010-02-04 | 2011-06-15 | 西北工业大学 | Circumferential mechanical property testing device of valve-model type thin-wall tube |
| CN103353419A (en) * | 2013-07-02 | 2013-10-16 | 中国核动力研究设计院 | Integrated measurement apparatus for circumferential stretching and deformation of thin-wall pipe and application method thereof |
-
2010
- 2010-02-04 CN CN2010201091772U patent/CN201607369U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793646B (en) * | 2010-02-04 | 2011-06-15 | 西北工业大学 | Circumferential mechanical property testing device of valve-model type thin-wall tube |
| CN103353419A (en) * | 2013-07-02 | 2013-10-16 | 中国核动力研究设计院 | Integrated measurement apparatus for circumferential stretching and deformation of thin-wall pipe and application method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101013 Effective date of abandoning: 20110615 |