CN104034589A - Hopkinson pull rod emission device - Google Patents
Hopkinson pull rod emission device Download PDFInfo
- Publication number
- CN104034589A CN104034589A CN201410208218.6A CN201410208218A CN104034589A CN 104034589 A CN104034589 A CN 104034589A CN 201410208218 A CN201410208218 A CN 201410208218A CN 104034589 A CN104034589 A CN 104034589A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- gun tube
- bullet
- piston
- stretching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a hopkinson pull rod emission device which comprises a stretching gun barrel, a linear ball guide sleeve, a switching block, a tubular bullet, a magnetic steel ring, a sleeve, a gun barrel base, a piston and an incident rod. According to the hopkinson pull rod emission device, a conventional emission device is improved to meet requirements of different experiments on rod diameters; the magnetic steel ring is mounted so as to eliminate hard collision between the piston and the gun barrel, so that the influence, which is caused by a high-frequency signal generated by the collision, on signal acquisition is avoided.
Description
Technical field
The invention belongs to material mechanical performance experiment field, particularly a kind of Hopkinson pull bar emitter.
Background technology
For research and the use of Hopkinson pull bar, be much all intended to eliminate high-frequency signal for the impact of device and reduce as far as possible the energy loss of power system in dynamic process is provided at present.High-frequency signal may come from experimental situation, also may come from experimental provision itself; The interference of experimental situation is uncertain at random, thereby but can realize the interference of experiment for improving experimental provision minimizing.For realizing the comparatively simple structure of promotion bullet motion on Hopkinson pull bar emitter, be that piston promotes at present, when piston promotes after bullet accelerator finishes to need piston to slow down.In general device as, as " a kind of emitter based on Hopkinson pull bar test unit " of the designs such as Mr. Zhang sends out, adopt the materials such as rubber blanket or bydraulic buffers to prevent that piston and gun tube from rigid contact occurring, but because deceleration distance is short, above-mentioned ways of deceleration still can not be eliminated the undesired signal producing owing to clashing into completely, so propose simply a kind of and effectively prevent that the structure of clashing into is by necessity.
Simultaneously to Hopkinson pressure bar improve for can more convenient research material under high rate of strain the test unit of this structure and component failure, so the improvement for experimental provision should both meet one dimension and the homogeneity that ripple is propagated in bar, met again certain radial dimension requirement.Generally, for this structure research of material, test club diameter is less, and test specimen diameter is also less, relatively stressed will be more even, also saved test specimen and test club material simultaneously.But some experiments need to adopt large bar footpath Hopkinson bar, as document " Georges Challita; Ramzi Othman:Finite-element analysis of SHPB tests on double-lap adhesive joints.International Journal of Adhesion and Adhesives.30 (4); 236-244 (2010) " is used the stressed and unsticking form of the two bonding testing pieces of Hopkinson pressure bar research under high rate of strain, in order to make bonding testing piece end stressed evenly, otherwise very high for the processing request of bonding testing piece; If use small pole diameter test club to test, experimental precision can be greatly affected.Document " Li Jicheng; CHEN XIAOWEI; Chen Gang: the dynamic deformation of 921A steel pure shear hat shaped specimen in SHPB experiment. blast and impact .V30; 2010 " use 25mmSHPB to be studied the shearing of material is stressed, Dan Gai study limitation is in metal processing and experiment, if adopt viscoelastic material or the sticky super material that plays, can make processing difficulties and experimental result due to the reason of relative shape become inaccurate.Use in this case large bar footpath Hopkinson bar to make moderate progress.
Summary of the invention
The object of the present invention is to provide a kind of antijamming capability stronger, and the Hopkinson pull bar emitter in replaceable different experiments bar footpath.
The technical solution that realizes the object of the invention is:
A kind of Hopkinson pull bar emitter, comprise stretching gun tube, straight-line ball guide pin bushing, transfer block, tubulose bullet, magnetic steel ring, sleeve, gun tube base, piston and incident bar, stretching gun tube is fixedly installed on gun tube base, the screwed sleeve in one end runs through stretching gun tube and is threaded connection the air intake opening end cap at stretching gun tube, with the piston bush of center pit one end near the air intake opening of stretching gun tube on sleeve, piston does not contact with sleeve, O RunddichtringO is set between the two, and coordinate with stretching gun tube internal surface gaps, tubulose bullet is slidably socketed on sleeve, the internal diameter of tubulose bullet is greater than the external diameter of sleeve, and one end contacts with piston, two magnetic steel rings are separately positioned on the bullet outlet end cap inwall of stretching gun tube and the end face of the nearly bullet outlet of piston, and both positions are corresponding, straight-line ball guide pin bushing is arranged on the nearly bullet endpiece of sleeve lining by transfer block, incident bar runs through whole emitter, and with straight-line ball guide pin bushing inwall clearance fit, the ring flange end of incident bar is arranged on nearly bullet endpiece.
The present invention compared with prior art, its remarkable advantage:
(1) the present invention can pass through the incident bar in different bars footpath with permission by changing straight-line ball guide pin bushing and transfer block, thereby adapts to the requirement of different experiments to bar footpath.
(2) the present invention uses simple magnetic steel ring structure to realize and promotes the non-rigid shock moderating process that bullet accelerates back piston, thereby eliminated completely because non-test club clashes into the high-frequency signal causing, disturbs.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of Hopkinson pull bar emitter of the present invention.
Fig. 2 is the A-A cut-open view of Fig. 1 of Hopkinson pull bar emitter of the present invention.
Embodiment
A kind of Hopkinson pull bar of the present invention emitter, comprise stretching gun tube 1, straight-line ball guide pin bushing 2, transfer block 3, tubulose bullet 4, magnetic steel ring 5, sleeve 6, gun tube base 7, piston 8 and incident bar 9, stretching gun tube 1 is fixedly installed on gun tube base 7, the screwed sleeve 6 in one end runs through stretching gun tube 1 and is threaded connection the air intake opening end cap at stretching gun tube 1, with the piston 8 of center pit, be enclosed within one end of the air intake opening of close stretching gun tube 1 on sleeve 6, piston 8 does not contact with sleeve 6, O RunddichtringO is set between the two, and coordinate with stretching gun tube 1 internal surface gaps, tubulose bullet 4 is slidably socketed on sleeve 6, the internal diameter of tubulose bullet 4 is greater than the external diameter of sleeve 6, and one end contacts with piston 8, two magnetic steel rings 5 are separately positioned on the bullet outlet end cap inwall of stretching gun tube 1 and the end face of the nearly bullet outlet of piston 8, and both positions are corresponding, straight-line ball guide pin bushing 2 is arranged on the nearly bullet endpiece of sleeve 6 inwalls by transfer block 3, incident bar 9 runs through whole emitter, and with straight-line ball guide pin bushing 2 inwall clearance fit, the ring flange end of incident bar 9 is arranged on nearly bullet endpiece.
Transfer block 3 is fixed on the nearly bullet endpiece of sleeve 6 inwalls by snap ring, straight-line ball guide pin bushing 2 is fixed on transfer block 3 inwalls by snap ring.
Tubulose bullet 4 is slidably socketed on sleeve 6, and because the area of contact is larger, the internal diameter that therefore designs tubulose bullet 4 is greater than the external diameter of sleeve 6, and tubulose bullet 4 hangs on sleeve 6, reduces friction, and meets slip requirement; And incident bar 9 is less with the contact area of straight-line ball guide pin bushing 2, therefore guarantee that larger clearance fit can meet slip requirement.
In the accompanying drawings, after the assembling of modified Hopkinson pull bar emitter, gun tube base 7 is arranged on horizontal stand.Introduce the embodiment of stretching experiment below:
Before stretching experiment, use tubulose bullet 4 piston with center pit 8 to be shifted onto to the inlet end of stretching gun tube 1, make to contact with stretching gun tube 1 air intake opening end cap with the piston 8 of center pit.Open cylinder and make gas enter stretching gun tube 1, gas push piston 8, piston 8 promotes tubulose bullet 4 and accelerates also finally from stretching gun tube 1, to penetrate.Tubulose bullet 4 clashes into the ring flange of incident bar 9 near one end generation wave of compression of stretching gun tube 1 subsequently, and wave of compression reflects to form stretching ripple at the ring flange other end, and data collecting card is collected the voltage signal that on incident bar 9, foil gauge produces.
At gas push piston 8, piston 8, promote in the process of bullet 4, the acting force between two magnetic steel rings 5 increases gradually, and when this power is greater than the pressure of γ-ray emission, piston 8 completes reducing speed now after the acceleration of tubulose bullet 4.With back piston 8 speed, reduce to zero also counter motion; After again reducing to zero, counter motion; So repeatedly until stop.Gas in stretching gun tube 1 is released by gap between part gradually.
In the time of need to carrying out the experiment of different bars footpath, first incident bar 9 is taken out, from sleeve 6 inwalls, take out transfer block 3 and straight-line ball guide pin bushing 2, transfer block 3, straight-line ball guide pin bushing 2 and the incident bar 9 in the required test club of fit on footpath subsequently.
Claims (2)
1. a Hopkinson pull bar emitter, it is characterized in that: comprise stretching gun tube (1), straight-line ball guide pin bushing (2), transfer block (3), tubulose bullet (4), magnetic steel ring (5), sleeve (6), gun tube base (7), piston (8) and incident bar (9), stretching gun tube (1) is fixedly installed on gun tube base (7), the screwed sleeve in one end (6) runs through stretching gun tube (1) and is threaded connection the air intake opening end cap at stretching gun tube (1), with the piston (8) of center pit, be enclosed within one end of the upper air intake opening near stretching gun tube (1) of sleeve (6), piston (8) does not contact with sleeve (6), O RunddichtringO is set between the two, and coordinate with stretching gun tube (1) internal surface gaps, tubulose bullet (4) is slidably socketed on sleeve (6), the internal diameter of tubulose bullet (4) is greater than the external diameter of sleeve (6), and one end contacts with piston (8), two magnetic steel rings (5) are separately positioned on the bullet outlet end cap inwall of stretching gun tube (1) and the end face of the nearly bullet outlet of piston (8), and both positions are corresponding, straight-line ball guide pin bushing (2) is arranged on the nearly bullet endpiece of sleeve (6) inwall by transfer block (3), incident bar (9) runs through whole emitter, and with straight-line ball guide pin bushing (2) inwall clearance fit, the ring flange end of incident bar (9) is arranged on nearly bullet endpiece.
2. Hopkinson pull bar emitter according to claim 1, it is characterized in that: described transfer block (3) is fixed on the nearly bullet endpiece of sleeve (6) inwall by snap ring, straight-line ball guide pin bushing (2) is fixed on transfer block (3) inwall by snap ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410208218.6A CN104034589B (en) | 2014-05-16 | 2014-05-16 | Hopkinson pull rod discharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410208218.6A CN104034589B (en) | 2014-05-16 | 2014-05-16 | Hopkinson pull rod discharger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104034589A true CN104034589A (en) | 2014-09-10 |
| CN104034589B CN104034589B (en) | 2016-07-06 |
Family
ID=51465444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410208218.6A Expired - Fee Related CN104034589B (en) | 2014-05-16 | 2014-05-16 | Hopkinson pull rod discharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104034589B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458454A (en) * | 2014-12-02 | 2015-03-25 | 南京理工大学 | Improved emitting device of Hopkinson pull rod |
| CN104483185A (en) * | 2014-12-22 | 2015-04-01 | 齐鲁工业大学 | Novel SHPB (split Hopkinson pressure bar) explosive power source device |
| CN104614230A (en) * | 2015-01-28 | 2015-05-13 | 南京理工大学 | Improved firing device of split Hopkinson torsion bar |
| CN105973731A (en) * | 2016-07-07 | 2016-09-28 | 西南交通大学 | SHTB (Split Hopkinson Tension Bar) device capable of eliminating pre-motion |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247180Y (en) * | 2008-08-13 | 2009-05-27 | 西北工业大学 | Air valve device for tensile loading |
| PT104167A (en) * | 2008-09-03 | 2010-03-03 | Inst Superior Tecnico | HOPKINSON TESTING MACHINE FOR ELECTROMAGNETIC IMPULSION |
| CN103076223A (en) * | 2012-12-30 | 2013-05-01 | 南京理工大学 | Launcher based on Hopkinson pull rod test equipment |
-
2014
- 2014-05-16 CN CN201410208218.6A patent/CN104034589B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247180Y (en) * | 2008-08-13 | 2009-05-27 | 西北工业大学 | Air valve device for tensile loading |
| PT104167A (en) * | 2008-09-03 | 2010-03-03 | Inst Superior Tecnico | HOPKINSON TESTING MACHINE FOR ELECTROMAGNETIC IMPULSION |
| CN103076223A (en) * | 2012-12-30 | 2013-05-01 | 南京理工大学 | Launcher based on Hopkinson pull rod test equipment |
Non-Patent Citations (2)
| Title |
|---|
| CHALLITA, GEORGES ET AL.: "Finite-element analysis of SHPB tests on double-lap adhesive joints", 《INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES》, vol. 30, no. 4, 30 June 2010 (2010-06-30), pages 236 - 244, XP026978235 * |
| 张君发 等: "基于显式算法的改进型SHTB实验模型研究", 《计算机工程与设计》, vol. 35, no. 2, 28 February 2014 (2014-02-28), pages 593 - 597 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458454A (en) * | 2014-12-02 | 2015-03-25 | 南京理工大学 | Improved emitting device of Hopkinson pull rod |
| CN104483185A (en) * | 2014-12-22 | 2015-04-01 | 齐鲁工业大学 | Novel SHPB (split Hopkinson pressure bar) explosive power source device |
| CN104614230A (en) * | 2015-01-28 | 2015-05-13 | 南京理工大学 | Improved firing device of split Hopkinson torsion bar |
| CN105973731A (en) * | 2016-07-07 | 2016-09-28 | 西南交通大学 | SHTB (Split Hopkinson Tension Bar) device capable of eliminating pre-motion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104034589B (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104034589A (en) | Hopkinson pull rod emission device | |
| Her et al. | The finite element analysis of composite laminates and shell structures subjected to low velocity impact | |
| CN103983512A (en) | Hopkinson pulling and pressing integrated experimental device | |
| CN102706224B (en) | Friction load loading device | |
| CN204422318U (en) | The modified emitter of Hopkinson pull rod | |
| CN103076223A (en) | Launcher based on Hopkinson pull rod test equipment | |
| CN104614230A (en) | Improved firing device of split Hopkinson torsion bar | |
| CN103471938B (en) | T-shaped Hopkinson torsion bar device | |
| CN104048883A (en) | Method for testing brittle material dynamic-shear fracture toughness and implementation device thereof | |
| CN102661904B (en) | Calibrator for rebound value of resiliometer and testing method for rebound value of resiliometer | |
| CN110455658A (en) | A kind of dynamic load mark test method for metal material | |
| CN105181486A (en) | Flywheel type split-Hopkinson torsional bar device | |
| CN202805103U (en) | Bearing inner ring pulling-dismantling auxiliary device and bearing pulling-dismantling device provided with the same | |
| CN104950128B (en) | A kind of ultrasound electric machine Intelligent Measurement bamboo chip lacks side device | |
| CN104502191A (en) | Device for fast detection of hinge main shaft riveting strength | |
| CN104458454A (en) | Improved emitting device of Hopkinson pull rod | |
| CN101782484B (en) | Combined test device for dynamic property of gas-gun testing material | |
| CN108181078B (en) | Piston stop device for cannon wind tunnel | |
| CN204302124U (en) | The modified emitter of Hopkinson pull rod | |
| CN202614728U (en) | Novel air ultrasonic probe used for contactless detection | |
| CN201689009U (en) | Gas-gun device used for testing dynamic property of material | |
| CN203191259U (en) | Concrete axial tension test device | |
| CN209077562U (en) | A kind of shell case hole punched device | |
| CN103278287B (en) | The sensor fastening device that shock wave stress model spherical array dynamic resistance is directly measured | |
| CN202461473U (en) | Centrifugal casting metal mold for air cylinder sleeve of marine diesel engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20180516 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |