CN202049088U - Experimental die used for testing tube forming - Google Patents
Experimental die used for testing tube forming Download PDFInfo
- Publication number
- CN202049088U CN202049088U CN2011200454966U CN201120045496U CN202049088U CN 202049088 U CN202049088 U CN 202049088U CN 2011200454966 U CN2011200454966 U CN 2011200454966U CN 201120045496 U CN201120045496 U CN 201120045496U CN 202049088 U CN202049088 U CN 202049088U
- Authority
- CN
- China
- Prior art keywords
- main body
- patrix
- die insert
- insert
- hollow
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an experimental die used for testing tube forming. The experimental die comprises a lower die insert provided with a hollow ring-shaped semi-columnar structure, and an upper die insert connected with the lower die insert, wherein, the upper die insert comprises a main body of the upper die insert, a hollow elliptic columnar body and two chamfer areas; the main body of the upper die insert, which is provided with a hollow ring-shaped semi-columnar structure, is connected with the lower die insert to form a hollow ring-shaped columnar structure; the hollow elliptic columnar body is arranged on the main body of the upper die insert and communicated with the main body of the upper die insert; and the two chamfer areas are arranged on the main body of the upper die insert and respectively positioned on the two sides of the hollow elliptic columnar body. By utilizing the experimental die used for testing tube forming, which is disclosed by the utility model, each ultimate strain state and a corresponding double-drawing strain state FLD (forming limit diagram) curve of an experimental tube in a hydraulic forming test can be acquired conveniently.
Description
Technical field
The utility model relates to tubing hydroforming field, more particularly, is a kind of experiment mould that is used for the forming tubular product test.
Background technology
Tubing hydroforming technology is a kind of a kind of plastic working new technology of utilizing fluid pressure to make the tubing distortion.Adopt the fittings hydraulic formation technology, can make the tubing that the places mould effect by highly pressurised liquid be shaped the hollow parts of various shape of cross sections.Compare with the automobile structure of traditional punching press-welding technology manufacturing, series of advantages such as adopt that the auto parts of tubing hydroforming technology manufacturing have that in light weight, rigidity and intensity height, crashworthiness performance are good, economical with materials, compact conformation, manufacturing procedure are few can satisfy the low carbonization of automobile, light-weighted requirement well.
In drawing, (Forming Limit Diagrams is an important tool estimating the sheet forming performance FLD) to forming limit diagram, obtains using the most widely.But hydroforming is different with traditional plate stamping with tubing force way and stress state in hydroforming process, and sheet material is becoming hydroforming to use in the pipe process through crooked with welding processing, variation has also taken place in its mechanical property, and the FLD of sheet material can not well use and instruct hydroforming.For this reason, press for the more perfect hydroforming of foundation with experimental technique and the experimental provision of tubing FLD and obtain its FLD, form the standard that pipes shaping limit is estimated, so that can provide foundation for forming defects prediction, technology and Optimizing die structure and the actual guidance of production.
The patent No. is KR656073-B1, the Korean Patent that name is called " method of testing of hydraulic expanding-forming steel tube forming limiting figure " disclosed be used for the forming limit diagram test as lower device: the zone that steel pipe does not print grid install a pair of on anchor clamps and lower clamp; With mold and bed die steel pipe is fixed; The hydraulic pressure end socket is installed on the steel pipe; Apply fluid pressure and axial thrust to steel pipe; The forming limit diagram of the steel pipe that measurement is broken under internal pressure and axial thrust effect.Thereby this patent can make on the test specimen certain property a bit along the line or the distortion of the almost strain paths strain regime that reaches capacity, and strain ratio is changed between-1 to 0.But this patent can only realize the test of hydraulic tube piece deep-drawing FLD curve, but can not realize the test of two tension state FLD curves.
Publication number is that the Chinese patent of CN101285749 discloses a kind of proving installation that is used for the pipes shaping limit curve of hydraulic bulging process.This patent proposes a kind of proving installation that is used for the pipes shaping limit curve of hydraulic bulging process, makes tubing strain ratio be changed between-1 to 1 with linearity or the distortion of almost strain paths and the strain regime that reaches capacity.But this patent makes the material axial deformation by applying mechanical pressure from the pipe outer wall, and the stress of material and mode of texturing have been different from the pipe fitting internal high pressure forming.
In sum, in the existing technical scheme, can not simulate correct force way of hydroforming and ess-strain mode, therefore can not obtain the FLD curve of complete two tension states.
The utility model content
The purpose of this utility model is to provide a kind of novel experiment mould that is used for the forming tubular product test, and it can bring out two tensile stress states of fittings hydraulic formation, thereby sets up the FLD curve of the two tension states of hydraulic tube piece.
The experiment mould that is used for forming tubular product test of the present utility model comprises: insert and insert with the described counterdie patrix that is connected of inserting for the counterdie of hollow annular semicolumn structure, wherein said patrix is inserted and is comprised:
The patrix main body of inserting, it is hollow annular semicolumn structure, the described patrix main body of inserting is inserted with described counterdie and is connected, and forms hollow circular cylindrical structure;
Be arranged at insert hollow ellipse cylinder on the main body of described patrix, described oval cylinder and the described patrix main body of inserting is connected;
Be arranged at insert two chamfered area on the main body of described patrix, this chamfered area lays respectively at the both sides of described hollow ellipse cylinder.
Preferably, described patrix is inserted and is also comprised the bead of two arcuations, and described bead lays respectively at the both sides of described two chamfered area.
Preferably, described patrix is inserted and counterdie is respectively arranged with on inserting and is used for interconnective a plurality of mounting hole.
Utilize the experiment mould that is used for forming tubular product test of the present utility model, can obtain comparatively easily experiment tubing in the hydroforming test each ultimate strain state and to deserved pair of stretching strain state FLD curve.
Description of drawings
Fig. 1 is a schematic perspective view of the present utility model;
Fig. 2 is the insert schematic perspective view of core of patrix of the present utility model;
Fig. 3 is the insert schematic perspective view of core of counterdie of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, structure of the present utility model and principle of work are elaborated.
As shown in Figure 1, be the schematic perspective view that is used for the experiment mould of forming tubular product test of the present utility model.Shown in Fig. 2,3, be respectively the schematic perspective view that a part of patrix is inserted and counterdie is inserted of this experiment mould.Particularly, this experiment mould comprises: for the counterdie of hollow annular semicolumn structure inserts 200 and insert 100 with counterdie 200 patrixes that are connected of inserting, wherein patrix is inserted and 100 is comprised: the patrix main body 110 of inserting, it also is hollow annular semicolumn structure, insert main body 110 and counterdie of patrix inserted and 200 is connected, and forms hollow circular cylindrical structure; Patrix is inserted and 100 is further comprised and be arranged at insert hollow ellipse cylinder 120 on the main body 110 of patrix, and the lateral cross section of this ellipse cylinder is an ellipsoidal structure, and is connected with the patrix main body 110 of inserting; Patrix is inserted and 100 is comprised also and be arranged at insert two chamfered area 113,114 on the main body 110 of patrix that chamfered area 113,114 lays respectively at the both sides of hollow ellipse cylinder 120, and next-door neighbour's hollow ellipse cylinder 120 is provided with in addition.
The radius of corner of chamfered area 113,114 hour help realizing bigger strain ratio, but too small chamfering may cause the chamfering place to be broken prior to body.For diameter is the tubing of 50-100mm, can the branch third gear determine the chamfering size, specifically as shown in table 1.
Table 1
| Pipe diameter Φ (mm) | Chamfering R (mm) |
| 50～60 | 6 |
| 60～70 | 8 |
| 70～100 | 10 |
In addition, for the experiment in the forming tubular product test needs, patrix 100 beads 111,112 that also can comprise two arcuations of inserting, bead 111,112 lays respectively at the both sides of described two chamfered area, and it is to be arranged at insert sunk structure on the main body 110 of patrix.
Shown in Fig. 2,3, patrix insert 100 and counterdie insert to be respectively arranged with on 200 and be used for interconnective a plurality of mounting hole 115,215, mounting hole 115,215 by means such as bolt with patrix insert 100 and counterdie insert and 200 link together.
By hollow ellipse cylinder 120 formed ellipsoid depression die cavity and draw-bead structures, can make the tubing that is printed on grid in ellipsoid die cavity 120, can be out of shape, thereby bring out two deformation states that draw with linear or almost linear strain paths.Particularly, the long axis length of supposing hollow ellipse cylinder elliptic cross-section is L1, and minor axis length is L2, and the ratio of the diaxon of elliptical area is γ=L1/L2.By changing bead and oval ratio, can obtain different strain ratio β=ε 2/ ε 1, wherein ε 1 is a principal strain, ε 2 is time strain.Insert 100 by the patrix of changing different oval ratios and different beads, can draw two differently strained points that draw deformation state.Particularly, oval ratio meets relation as shown in table 2 basically with the relation of strain ratio.
Table 2
| γ is compared in ellipse garden | Have or not drawbead | Strain ratio β |
| 1 | Do not have | 0.1～0.2 |
| 1 | Have | 0.2～0.3 |
| 0.8 | Have | 0.3～0.4 |
| 0.6 | Have | 0.4～0.5 |
| 0.5 | Have | 0.5 about |
| 0.44～0.5 | Have | 0.5 more than |
Separate knick point grid strain value on every side by measuring elliptical section, can obtain the FLD curve of two tension states.
Carrying out forming tubular product when test, at first this experiment mould is being installed in the outside inserts, and is selecting corresponding seal head and liquid barrier.Need on the tubing that needs to test to realize producing grid, for example adopt electrochemical etching method, print the tangent grid that diameter is 2.5mm on every side at experiment tubing earlier.In the hydroforming experimentation, by to the replacing of different moulds of the present utility model and repeatedly test, promptly, can draw the test specimen of the two differently strained ratios of tension state of same material by changing the ellipse ratio and the bead intensity of hollow ellipse cylinder 120 oval cross sections.Take out test specimen, the network after the distortion is carried out Measurement and analysis, thereby obtain corresponding ultimate strain state thereafter.Pass through data processing at last, finally obtain the FLD curve of the two stretching strain states of tubing.
In sum, utilize the experiment mould that is used for the forming tubular product test of the present utility model, can obtain comparatively easily experiment tubing in hydroforming test each ultimate strain state and to deserved pair of stretching strain state FLD curve, thereby effectively promoted designing and developing and industrialization of hydroforming part.
Claims (3)
1. an experiment mould that is used for the forming tubular product test is characterized in that this experiment mould comprises: counterdie is inserted, and it is hollow annular semicolumn structure; And insert with the described counterdie patrix that is connected of inserting, wherein said patrix is inserted and is comprised:
The patrix main body of inserting, it is hollow annular semicolumn structure, the described patrix main body of inserting is inserted with described counterdie and is connected, and forms hollow circular cylindrical structure;
Be arranged at insert hollow ellipse cylinder on the main body of described patrix, described oval cylinder and the described patrix main body of inserting is connected;
Be arranged at insert two chamfered area on the main body of described patrix, this chamfered area lays respectively at the both sides of described hollow ellipse cylinder.
2. the experiment mould that is used for the forming tubular product test according to claim 1 is characterized in that described patrix is inserted and also comprised the bead of two arcuations, and described bead lays respectively at the both sides of described two chamfered area.
3. the experiment mould that is used for the forming tubular product test according to claim 1 and 2 is characterized in that, is respectively arranged with on described patrix is inserted and counterdie is inserted to be used for interconnective a plurality of mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200454966U CN202049088U (en) | 2011-02-22 | 2011-02-22 | Experimental die used for testing tube forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200454966U CN202049088U (en) | 2011-02-22 | 2011-02-22 | Experimental die used for testing tube forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049088U true CN202049088U (en) | 2011-11-23 |
Family
ID=44989394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200454966U Expired - Fee Related CN202049088U (en) | 2011-02-22 | 2011-02-22 | Experimental die used for testing tube forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202049088U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615166A (en) * | 2012-03-27 | 2012-08-01 | 吉林省元隆达工装设备有限公司 | Internal high pressure forming die |
| CN103056220A (en) * | 2011-10-21 | 2013-04-24 | 林栢村 | Punch with groove structure and micro-stretching forming device applying punch |
| CN104998976A (en) * | 2015-08-21 | 2015-10-28 | 江苏久日数控机床有限公司 | Bending tool for CNC bending machine |
| CN107941609A (en) * | 2017-10-31 | 2018-04-20 | 太原理工大学 | A kind of method and apparatus for establishing thin-wall pipes forming limit diagram |
-
2011
- 2011-02-22 CN CN2011200454966U patent/CN202049088U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056220A (en) * | 2011-10-21 | 2013-04-24 | 林栢村 | Punch with groove structure and micro-stretching forming device applying punch |
| CN102615166A (en) * | 2012-03-27 | 2012-08-01 | 吉林省元隆达工装设备有限公司 | Internal high pressure forming die |
| CN104998976A (en) * | 2015-08-21 | 2015-10-28 | 江苏久日数控机床有限公司 | Bending tool for CNC bending machine |
| CN107941609A (en) * | 2017-10-31 | 2018-04-20 | 太原理工大学 | A kind of method and apparatus for establishing thin-wall pipes forming limit diagram |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201317023Y (en) | Pipe punching device | |
| CN202049088U (en) | Experimental die used for testing tube forming | |
| CN105013908B (en) | For the assembling die and manufacturing process of the shaping of flange pipe nipple | |
| CN110976587B (en) | Forming method and device for continuous multi-wave pipe fitting with ultra-large section difference | |
| CN201791789U (en) | Reshaping device of steel pipe | |
| CN105598265A (en) | Overall forming method of small-relative-bending-radius and large-diameter-thickness-ratio thin-walled bent pipe fitting | |
| CN102607969A (en) | Device and method for testing forming limit of sheet material in three-dimensional stress state | |
| CN203281699U (en) | Pipe fitting outer salient point forming device | |
| EP2752255A1 (en) | Welded steel pipe fabrication method and welded steel pipe | |
| CN201855863U (en) | Flanged edge processing device for tee pipe fittings | |
| CN201295718Y (en) | Radial pressing and bulging device for pipes | |
| CN105081121A (en) | Pipe end contraction device | |
| CN202192142U (en) | Pipe fitting bulge forming mechanism | |
| CN202316740U (en) | Axle case lute hole stamping and forming machine tool for car drive axle | |
| CN101285749A (en) | Pipes shaping limit curve test device for hydraulic bulging process | |
| CN219819420U (en) | Supporting structure in thin-wall pipe | |
| CN213256517U (en) | Large-diameter thin-walled pipe liquid-filling bending forming device | |
| CN206677011U (en) | A kind of not reciprocity caliber shaped device of stainless steel | |
| CN202049084U (en) | Flexibility testing die of forming limit curves (FLC) of pipe fittings | |
| CN209716161U (en) | The stamping die of integral type ball-type multi-way pipe fitting | |
| CN207806226U (en) | A kind of building mortion of stainless steel bimetallic tube | |
| CN213559204U (en) | Equipment for manufacturing metal corrugated pipe | |
| CN201361679Y (en) | Forging mould device for stepped-type large inner bore sleeves | |
| CN203565528U (en) | Double-end pipe fitting forming equipment | |
| CN208178267U (en) | Combination tower type, the thin-walled annular metal rubber piece stamping die with interior deep floor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20111123 Termination date: 20200222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |