CN203324123U - Testing device of hydraulic tube bulging forming limit diagram - Google Patents
Testing device of hydraulic tube bulging forming limit diagram Download PDFInfo
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- CN203324123U CN203324123U CN2013202408976U CN201320240897U CN203324123U CN 203324123 U CN203324123 U CN 203324123U CN 2013202408976 U CN2013202408976 U CN 2013202408976U CN 201320240897 U CN201320240897 U CN 201320240897U CN 203324123 U CN203324123 U CN 203324123U
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- ring
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Abstract
The utility model discloses a testing device of a hydraulic tube bulging forming limit diagram. The device comprises a solid connecting screw rod, a hollow connecting screw rod, locking nuts, bulging pipe end retainers, sealing columns, positioning rings, an internal thread connecting sleeve with a liquid injection hole, and a limiting sleeve, wherein the solid connecting screw rod is provided with a boss, and threads are arranged at two sides of the boss; the hollow connecting screw is provided with a boss, and threads are arranged at two sides of the boss; the bulging pipe end retainers are distributed between the locking nuts and the bosses of the solid connecting screw rod and the hollow connecting screw rod, the solid connecting screw rod and the hollow connecting screw rod are connected through the internal thread connecting sleeve, the sealing columns are distributed between the bosses of the solid connecting screw rod and the hollow connecting screw rod and the internal thread connecting sleeve, the positioning rings are sleeved at two ends of a bulging pipe to be tested, and a limiting component is arranged between the two positioning rings. By utilizing the device, a complete tube bulging forming limit diagram can be obtained. The device has the advantages of being convenient to operate, reliable in testing result, low in manufacturing cost and the like.
Description
Technical field
The utility model relates to the hydraulic expanding-forming technical field of metal pipe material, is specifically related to a kind of proving installation of Tube Hydroforming forming limit diagram.
Background technology
The Tube Hydroforming technology has the series of advantages such as the operation integrated level is high, detail rigidity is high, quality is light, has been widely applied to the fields such as automobile, Aeronautics and Astronautics, boats and ships, household electrical appliances.The Tube Hydroforming forming limit diagram is an important indicator estimating the Tube Hydroforming forming property, can judge tubing in the hydraulic expanding-forming process along with the change of the strain regime state of rupture that whether reaches capacity, the figure that ultimate strain state value when it under various linear strains path, plastic yield occurs by tubing forms.The Tube Hydroforming forming limit diagram comprises left field (being the shaping limit curve that the ultimate strain state value under various drawing-compressive strain state forms) and right side part (being the shaping limit curve that the ultimate strain state value under various drawing-stretching strain state forms), and how building the Tube Hydroforming forming limit diagram is important research and the problem that needs solution.
At present, the method that builds the Tube Hydroforming forming limit diagram mainly contains theoretical analytical method, Method of Numerical Simulation and experimental technique, and wherein experimental method is considered to the most accurately and the most practical method.Obtain complete Tube Hydroforming forming limit diagram, need to obtain respectively the ultimate strain state value of its left field and right side part, this just requires tubing to be issued to limit state of rupture in linearity or almostlinear strain paths, and can make strain paths change between-1 to 1.Through the literature search to prior art, find, Korean patent No. is that KR656073-B1 discloses a kind of method that builds the Tube Hydroforming forming limit diagram.This patent is installed to the hydraulic pressure end socket on steel pipe, to steel pipe, applies internal pressure and axial thrust simultaneously, measures the ultimate strain value of tubing under various drawing-compressive strain state.The method can obtain the left field of Tube Hydroforming forming limit diagram, and strain paths is-1 to 0, but can not get its right side part.The patent document that China Patent No. is 200810037829.3 discloses a kind of proving installation of the pipes shaping limit curve for hydraulic bulging process, this patent applies axial thrust by the left and right push rod to tubing, tubing inside is passed into to highly pressurised liquid simultaneously and realize drawing-the compressive strain state, obtained the left field of Tube Hydroforming forming limit diagram; In the situation that internal pressure is only arranged, utilize briquetting to apply lateral pressure to the tube bulge district when tubing two ends are applied to circumferential constraint and realize drawing-the stretching strain state, obtained the right side part of Tube Hydroforming forming limit diagram.This patent can obtain complete Tube Hydroforming forming limit diagram, but can only be tested for the tubing of a certain given diameter, and the change of strain paths realizes by changing expanding die, and practicality and adaptability are not strong.
The utility model content:
The purpose of this utility model is the deficiency for current Tube Hydroforming forming limit diagram construction method and proving installation, a kind of new proving installation is provided, is intended to obtain rapidly and accurately left field (draw-compressive strain state) part and right side area (draw-stretching strain state) part of Tube Hydroforming forming limit diagram.
This proving installation is by applying drawn-compressive strain of axial thrust and internal pressure state (accompanying drawing 1) to tubing, by constraint tubing two ends, make tubing only be subject to the drawn-stretching strain state that is used for (accompanying drawing 2) of internal pressure, realize different strain paths under two kinds of strain regimes by the method (accompanying drawing 1 and accompanying drawing 2) that changes the tube bulge section length, the strain paths scope is-1 to 1.
A kind of proving installation of Tube Hydroforming forming limit diagram, comprise with boss and in the boss both sides threaded solid connecting screw rod, with boss and in the boss both sides threaded hollow connecting screw rod, set nut, bulging pipe end blocking piece, sealing column, centring ring, with the internal thread joint sleeve of liquid injection hole, limiting component; Bulging pipe end blocking piece is arranged between the boss of set nut and solid connecting screw rod and hollow connecting screw rod, solid connecting screw rod is connected by the internal thread joint sleeve with hollow connecting screw rod, sealing column is arranged between the boss and internal thread joint sleeve of solid connecting screw rod and hollow connecting screw rod, centring ring is enclosed within the two ends of bulging pipe to be measured, limiting component is arranged between two centring rings, and the termination of solid connecting screw rod and hollow connecting screw rod is placed on bearing support.
Described bulging pipe end blocking piece is back-up ring or axial pressure head, or the locking back-up ring be comprised of bellmouth back-up ring, taper briquetting, and the tapering of the bellmouth of bellmouth back-up ring and taper briquetting cooperatively interacts and be corresponding with bulging pipe size.Back-up ring or axial pressure head or locking back-up ring, select a use.
The accompanying drawing explanation
Fig. 1 is the forming limit diagram left field schematic diagram in the utility model.
Fig. 2 is the forming limit diagram right side area schematic diagram in the utility model.
Fig. 3-1, Fig. 3-2, Fig. 3-3 are Tube Hydroforming forming limit diagram proving installation structural representation.
In accompanying drawing:
1. solid connecting screw rod; 2. set nut; 3a. back-up ring; 3b. axial pressure head; 3c. bellmouth back-up ring; 3d. taper briquetting; 4. sealing column; 5. centring ring; 6. internal thread joint sleeve; 7. limiting component; 8. bulging pipe to be measured; 9. hollow connecting screw rod; 10. bearing support; 11. liquid injection port;
F. axle pressure;
P. internal pressure;
l 1,
l 2. the bulging section length.
Embodiment:
Below in conjunction with drawings and Examples, the utility model is described in further detail:
A kind of proving installation of Tube Hydroforming forming limit diagram, comprise with boss and in the boss both sides threaded solid connecting screw rod 1, with boss and in the boss both sides threaded hollow connecting screw rod 9, set nut 2, bulging pipe end blocking piece (3a, 3b, 3c and 3d), sealing column 4(the present embodiment adopts macromolecule plasticity material), centring ring 5, with the internal thread joint sleeve 6 of liquid injection hole, limiting component 7(the present embodiment adopts the band stepped sleeve); Bulging pipe end blocking piece (3a, 3b, 3c and 3d) is arranged between the boss of set nut 2 and solid connecting screw rod 1 and hollow connecting screw rod 9, solid connecting screw rod 1 is connected by internal thread joint sleeve 6 with hollow connecting screw rod 9, sealing column 4 is arranged between the boss and internal thread joint sleeve 6 of solid connecting screw rod 1 and hollow connecting screw rod 9, centring ring 5 is enclosed within the two ends of bulging pipe 8 to be measured, and limiting component 7 is arranged between two centring rings 5.
The termination of the threaded one end of solid connecting screw rod 1 and hollow connecting screw rod 9 is square cylinders that radial dimension is less than the screw thread path.Have Baltimore groove on bearing support, for the square cylinder part of standing screw termination.
1. build the left field (draw-compressive strain state) of Tube Hydroforming forming limit diagram:
At first at the roundness mess of tubing 8 surperficial printed certain diameters to be measured, sealing column 4 is enclosed within respectively on solid connecting screw rod 1 and hollow connecting screw rod 9, respectively solid connecting screw rod 1 is connected with the two ends of internal thread adapter sleeve 6 with hollow connecting screw rod 9, in the whole insertion of the above-mentioned parts tubing 8 to be measured connected.Then solid connecting screw rod 1 and hollow connecting screw rod 9 are tightened, sealing column 4 two ends are adjacent to tubing 8 inside surfaces to be measured after the power of being squeezed, thereby treat test tube material 8, realize sealing.Be inserted in centring ring 5 at tubing to be measured 8 two ends, and back-up ring 3a is inserted in respectively to solid connecting screw rod 1 and hollow connecting screw rod 9, rely on set nut 2 and screw rod boss that back-up ring 3a is fixed.Again the termination square cylinder of solid connecting screw rod 1 and hollow connecting screw rod 9 is snapped in to the Baltimore groove on bearing support, adjust the distance of two centring rings 5 according to the needs of tube bulge section length to be measured, oil fuel tube is connected to the liquid injection port 11 of upper hollow connecting screw rod 9.
To the interior injection hydraulic oil of tubing 8 to be measured, in the internal pressure increased gradually
PPlastic yield the state of rupture that reaches capacity occur in the lower tubing of effect 8 bulging districts.Choose suitable point near breakdown point, utilize the distortion of the mesh measuring system to measure the value of its hoop strain and axial strain.Different bulging section length is set, repeats above step, the ultimate strain state value in differently strained path under drawn-compressive strain state.The ultimate strain state value of acquisition is depicted in and take axial strain and hoop strain in the coordinate system of transverse and longitudinal coordinate, obtained the part ultimate strain state value of Tube Hydroforming forming limit diagram left field.
Change the back-up ring 3a in Fig. 3-1 into axial pressure head 3b, as shown in Fig. 3-2, repeat said process, tubing is applied to axial thrust
FAnd internal pressure
PAnd make the tubing state of rupture that reaches capacity.The ultimate strain state value of different bulging section length is painted in coordinate system, just can obtains the left field of complete Tube Hydroforming forming limit diagram.
2. build the right side area (draw-stretching strain state) of Tube Hydroforming forming limit diagram:
Install tubing 8 to be measured according to step before 1. described oilings, only before being inserted in centring ring 5, tubing to be measured 8 two ends first are inserted in limiting component (sleeve) 7, change the axial pressure head 3b in Fig. 3-2 into formed by bellmouth back-up ring 3c and taper briquetting 3d locking back-up ring again, utilize its conical properties that tubing to be measured 8 two ends are squeezed into to the hydraucone shape and are locked.
To the interior injection hydraulic oil of tubing 8 to be measured, in the internal pressure increased gradually
PPlastic yield the state of rupture that reaches capacity occur in the lower tubing of effect 8 bulging districts.Choose suitable point near breakdown point, utilize the distortion of the mesh measuring system to measure the value of its hoop strain and axial strain.By changing the spacing collar 7 of different length, different bulging section length is set, repeat above step, the ultimate strain state value of different bulging section length is painted in coordinate system, just can obtain the right side part of Tube Hydroforming forming limit diagram.
Above-described embodiment is used for building complete Tube Hydroforming forming limit diagram, realize different strain pathses by the method that changes the bulging section length, by drawn-compressive strain state value on a hydraulic expanding device for pipe material and draw-stretching strain state value, can make tubing that plastic yield the state of rupture that reaches capacity occur under linearity or almostlinear strain paths.It is simple that this device has principle, easy to operate, reliable results, the series of advantages such as with low cost.
Claims (6)
1. the proving installation of a Tube Hydroforming forming limit diagram, it is characterized in that: comprise with boss and in the boss both sides threaded solid connecting screw rod (1), with boss and in the boss both sides threaded hollow connecting screw rod (9), set nut (2), bulging pipe end blocking piece (3a, 3b, 3c and 3d), sealing column (4), centring ring (5), with the internal thread joint sleeve (6) of liquid injection hole, limiting component (7); Bulging pipe end blocking piece (3a, 3b, 3c and 3d) is arranged between the boss of set nut (2) and solid connecting screw rod (1) and hollow connecting screw rod (9), solid connecting screw rod (1) is connected by internal thread joint sleeve (6) with hollow connecting screw rod (9), sealing column (4) is arranged between the boss and internal thread joint sleeve (6) of solid connecting screw rod (1) and hollow connecting screw rod (9), centring ring (5) is enclosed within the two ends of bulging pipe to be measured (8), and limiting component (7) is arranged between two centring rings (5).
2. proving installation according to claim 1, it is characterized in that bulging pipe end blocking piece wherein is back-up ring (3a) or axial pressure head (3b), or the locking back-up ring formed by bellmouth back-up ring (3c), taper briquetting (3d), the tapering of the bellmouth of bellmouth back-up ring and taper briquetting cooperatively interacts.
3. proving installation according to claim 1, is characterized in that limiting component (7) wherein is sleeve-shaped.
4. according to claim 1 or 2 or 3 described proving installations, it is characterized in that sealing column (4) wherein made by macromolecule plasticity material.
5. proving installation according to claim 4, is characterized in that solid connecting screw rod (1) wherein and a side screw tip of hollow connecting screw rod (9) are the square cylinders that radial dimension is less than the screw thread path outward.
6. proving installation according to claim 5, characterized by further comprising a set of bearing support (10), has Baltimore groove on bearing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202408976U CN203324123U (en) | 2013-05-07 | 2013-05-07 | Testing device of hydraulic tube bulging forming limit diagram |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202408976U CN203324123U (en) | 2013-05-07 | 2013-05-07 | Testing device of hydraulic tube bulging forming limit diagram |
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| CN203324123U true CN203324123U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202408976U Expired - Fee Related CN203324123U (en) | 2013-05-07 | 2013-05-07 | Testing device of hydraulic tube bulging forming limit diagram |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267689A (en) * | 2013-05-07 | 2013-08-28 | 桂林电子科技大学 | Pipe hydrobulging forming limit diagram construction method and test apparatus |
| CN104596858A (en) * | 2013-10-30 | 2015-05-06 | 上海汇众汽车制造有限公司 | Experiment device for acquiring pipe hydro-bugling basic property parameters |
-
2013
- 2013-05-07 CN CN2013202408976U patent/CN203324123U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267689A (en) * | 2013-05-07 | 2013-08-28 | 桂林电子科技大学 | Pipe hydrobulging forming limit diagram construction method and test apparatus |
| CN104596858A (en) * | 2013-10-30 | 2015-05-06 | 上海汇众汽车制造有限公司 | Experiment device for acquiring pipe hydro-bugling basic property parameters |
| CN104596858B (en) * | 2013-10-30 | 2017-06-06 | 上海汇众汽车制造有限公司 | Obtain the experimental provision of Tube Hydroforming basic property parameter |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20140507 |