CN103551419B - A kind of asymmetric pipe processing method adopting transition state mould - Google Patents
A kind of asymmetric pipe processing method adopting transition state mould Download PDFInfo
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- CN103551419B CN103551419B CN201310461559.XA CN201310461559A CN103551419B CN 103551419 B CN103551419 B CN 103551419B CN 201310461559 A CN201310461559 A CN 201310461559A CN 103551419 B CN103551419 B CN 103551419B
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Abstract
A kind of asymmetric pipe processing method adopting transition state mould of the present invention, belong to sheet-metal formed field, the present invention is according to the transition mould of design, finishing is not needed namely to can be used for batch production after manufacture completes, the method realizes the high-pressure forming of aximal deformation value space curved surface pipe fitting, make working (machining) efficiency improve 5 times, precision improves 3 times.
Description
Technical field
The invention belongs to sheet-metal formed field, be specifically related to a kind of asymmetric pipe processing method adopting transition state mould.
Background technology
The Study of Support of project is the shaping of asymmetric spatial warping profile mozzle, part is spatial warping profile, profile is relative to space any point, line or face are all asymmetric, whole profile has more than 10 aerial cross sectional to control, shape is as Fig. 2, the large end face girth of part is 1.415 times of small end perimeter of section, this shows to adopt materials in the tube blank forming, its maximum deformation quantity reaches 41.5%, deflection has exceeded the material percentage elongation limit 40% in material (high temperature alloy) standard, the method of the domestic current employing of shaping of this part welds (taking plate as blank) after die forming and low melting point plastic medium is crowded is expanded into shape (taking materials in the tube as blank), traditional process efficiency of welding afterwards of being first shaped is low, precision is low, can not meet new product accuracy requirement, and low melting point plastic medium squeezes the forming mode being expanded into shape can not be shaped the pipe fitting of aximal deformation value.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of asymmetric pipe processing method adopting transition state mould, to reach the high-pressure forming technique application in part processing of materials in the tube as blank, improves the object of the accuracy of final products profile.
Adopt an asymmetric pipe processing method for transition state mould, comprise the following steps:
Step 1, according to plumbing dimensions parameter to be processed, design this pipe fitting transition mould, be specially:
Set up the model of transition mould, process is as follows:
The girth in step 1-1, the acquisition each cross section of transition mould;
Step 1-1-1, set up three-dimensional system of coordinate, according to the size of actual pipe fitting different cross section, obtain this cross section curve in the coordinate system, and multiple cross section curve is combined to form the threedimensional model of this pipe fitting;
Step 1-1-2, an addendum surface for sealing respectively is set at the two ends of above-mentioned threedimensional model;
Step 1-1-3, the threedimensional model adding secondary surface vertically ajusted and carries out cross section again, determine the curve in new cross section, and obtain the girth of new cross section curve;
The center of circle in step 1-2, the acquisition each cross section of transition mould;
Step 1-2-1, determine the respective central point of two fillets on the end face of threedimensional model one end, and by above-mentioned two central point lines; Determine the respective central point of two fillets on threedimensional model other end end face, and by above-mentioned two central point lines;
Step 1-2-2, get any one horizontal plane, two central point lines determined in step 4 are projected on this horizontal plane, forms two cross spiders, and the little angle that above-mentioned cross spider is formed is divided equally, determine the position of angular bisector;
Step 1-2-3, obtain the position of centre of gravity in each new cross section, cross angular bisector and do one perpendicular to the face of horizontal plane, cross the vertical line that center of gravity does this face, obtain the girth of this vertical line side cross section curve and the girth of vertical line opposite side cross section curve respectively, above-mentioned both sides girth is done difference and divided by 2, and then obtain revise side-play amount;
Step 1-2-4, by center of gravity to direction, girth longer side skew, displacement by being tried to achieve side-play amount, the center of circle using the position of centre of gravity after movement as each cross section;
Step 1-3, formation pipe fitting transition mold former;
Step 1-3-1, with step 1-1 obtain girth and step 1-2 obtain the center of circle do circle, Formation cross-section be circle new threedimensional model, horizontal positioned, connects the center of circle in each cross section of new threedimensional model, forming curves, cross this curve do a horizontal curved surface;
Step 1-3-2, using new threedimensional model as shape face in pipe fitting transition state mould, using horizontal curved surface as the die joint of pipe fitting transition state mould processing transition morphotype tool;
Step 2, according to pipe fitting transition mold former production and processing pipe fitting transition mould;
Step 3, woollen blank to be positioned in pipe fitting transition mould, to be filled with highly pressurised liquid and itself and dies cavity profile are fitted, then woollen blank is taken out put into and expect that pipe fitting profile mould flattens, and pour highly pressurised liquid at this, namely obtain final pipe fitting.
Secondary surface described in step 1-1-2, its two ends are cylinder type, and the center of circle of two end sections is positioned on same axis.
The number in the cross section again described in step 1-1-3 is identical with former cross section number.
Advantage of the present invention:
A kind of asymmetric pipe processing method adopting transition state mould of the present invention, according to the transition mould of the method design, do not need finishing namely to can be used for batch production after having manufactured, the method realizes the high-pressure forming of aximal deformation value space curved surface pipe fitting, make working (machining) efficiency improve 5 times, precision improves 3 times.
Accompanying drawing explanation
Fig. 1 is the asymmetric pipe processing method flow chart of the employing transition state mould of an embodiment of the present invention;
Fig. 2 is the mozzle threedimensional model schematic diagram of an embodiment of the present invention;
Fig. 3 is the mozzle threedimensional model schematic diagram after the increase secondary surface of an embodiment of the present invention;
Fig. 4 is the threedimensional model schematic diagram after vertically ajusting of an embodiment of the present invention;
Fig. 5 is the threedimensional model both ends of the surface fillet line schematic diagram of an embodiment of the present invention;
Fig. 6 is the threedimensional model both ends of the surface fillet line perspective view of an embodiment of the present invention;
Fig. 7 is the angular bisector floor map excessively of an embodiment of the present invention;
Fig. 8 is the centroid of section vertical line schematic diagram of an embodiment of the present invention;
Fig. 9 is the mozzle mould structure schematic diagram of an embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, an embodiment of the present invention is described further.
The embodiment of the present invention is based on based on hydroforming technology, there is the tiny characteristic such as convex closure, minor radius fillet in tube surface, and adopt the deflection of pipe fitting forming to reach the forming limit (easily breaking) of material, so need first for blank girth bulging to (or close) final size, eliminate after flow harden and reshape local feature, its intermediate state model (mould) become the key that can present invention process apply.
Adopt an asymmetric pipe processing method for transition state mould, flow chart as shown in Figure 1, comprises the following steps:
Step 1, according to plumbing dimensions parameter to be processed, design this pipe fitting transition mould, be specially:
Set up the model of transition mould, process is as follows:
The girth in step 1-1, the acquisition each cross section of transition mould;
Step 1-1-1, set up three-dimensional system of coordinate, according to the size of actual pipe fitting different cross section, obtain this cross section curve in the coordinate system, and multiple cross section curve is combined to form the threedimensional model of this pipe fitting;
As shown in Figure 2, in the embodiment of the present invention, be described for aircraft engine mozzle, each cross section curve of constituent part is drawn by the design data (coordinate points) of mozzle, and the mozzle model utilizing these curves to set up, this model contains all coordinate datas determining mozzle profile.
Step 1-1-2, respectively arrange an addendum surface for sealing at the two ends of above-mentioned threedimensional model, described secondary surface, its two ends are cylinder type, and the center of circle of two end sections is positioned on same axis.
In the embodiment of the present invention, according to structure and the woollen state of mozzle sealed end, the addendum surface at model two ends must containing coaxial cylinder, for making shaping deflection as far as possible little, secondary surface two cylindrical section axis should pass through mozzle kernel of section, on Selection Model, the center of gravity line of lower section is as the horizontal axis (secondary surface axis) during part forming, with this axis for axle sets up secondary surface (two sections of faces of cylinder and fillet surface), increase the model of secondary surface as Fig. 3, this model is the basis of design transition state model, the face of cylinder at the two ends of the model in figure and the transition profile of centre are secondary surface, the diameter on the face of cylinder is determined according to the diameter choosing woollen.
Step 1-1-3, vertically to be ajusted by the threedimensional model adding secondary surface and carry out cross section again, determine the curve in new cross section, and obtain the girth of new cross section curve, the number in cross section is identical with former cross section number again;
For obtaining the final accurately profile of part, adopt materials in the tube as blank, must first by each perimeter of section bulging of part to or close to end interface girth, consider the forming limit making full use of material, the Cross section Design of bulging transition state model is circular to shaping favourable, design difficulty is (as shown in Figure 4): in model except technique auxiliary circle cylinder, all cross sections are all made up of space coordinates point, the center of circle of each circular cross-section of transition state model is difficult to determine, be directed to this difficult point, in the embodiment of the present invention, take following measures:
As shown in Figure 4, in the embodiment of the present invention, the model increasing secondary surface is put in a coordinate system again, two technique auxiliary circle cylinders are ajusted (namely vertically ajusting) along Z-direction, again on model, intercept profile, and obtain sectional profile curve lin, and each perimeter of section can be obtained, the object of this design procedure is in order to the bulging direction of forming process is consistent with calculated direction, makes mold former design data more accurate.
The center of circle in step 1-2, the acquisition each cross section of transition mould;
Step 1-2-1, determine the respective central point of two fillets on the end face of threedimensional model one end, and by above-mentioned two central point lines; Determine the respective central point of two fillets on threedimensional model other end end face, and by above-mentioned two central point lines;
In the embodiment of the present invention, as shown in Figure 5, in the model set up by design data, determine central point A, the B of two fillets on the end face of threedimensional model one end, central point C, D of two fillets on other end end face, by the fillet center, front and back of upper and lower two sections line respectively, form line AB and CD;
Step 1-2-2, get any one horizontal plane, two central point lines determined in step 4 are projected on this horizontal plane, forms two cross spiders, and the little angle that above-mentioned cross spider is formed is divided equally, determine the position of angular bisector;
As shown in Figure 6, two lines are projected on horizontal plane a, form two cross spiders (these two line A
1b
1and C
1d
1the degreeof tortuosity of part profile can be reacted), be angular bisector EF at acute angle place;
Step 1-2-3, cross angular bisector and do one perpendicular to the face of horizontal plane, obtain the position of centre of gravity in each new cross section, cross the vertical line that center of gravity did the face of angular bisector, obtain the girth of this vertical line side cross section curve and the girth of vertical line opposite side cross section curve respectively, above-mentioned both sides girth is done difference and divided by 2, and then obtain revise side-play amount;
In the embodiment of the present invention, as shown in Figure 7, making parallel and Z axis plane b, this plane b by being this part transition state blank and horizontal positioned face during final shaping on mould by this angular bisector EF, is also the important references face of design transition state mold former; The sectional profile curve lin regained is filled curved surface one by one, obtain again the center of gravity of sectioned, as the reference center of each circular section of transition state model, as shown in Figure 8, cross the straight line GH (cross vertical line that center of gravity do horizontal positioned face) of centroid of section c work perpendicular to plane b, each for model cross section is divided into two parts by this straight line GH, but two-part length of curve is all unequal, this is also that center of gravity can not as the reason in the center of circle, transition state model circular section, so need to carry out trace adjustment, require to adjust to two-part girth equal.
Measure two-part girth respectively, according to girth difference by center of gravity to girth longer side translation 1/2nd difference, this difference is chord length is not girth, two girths can not be adjusted to completely equal by the method, but because the radius of curvature of vertical line position is comparatively large, and adjustment amount is very little, therefore, adjustment chord length and arc length difference very little, this measures of dispersion can not affect the final shaping of product.
Step 1-2-4, by center of gravity to direction, girth longer side skew, displacement by being tried to achieve side-play amount, the center of circle using the position of centre of gravity after movement as each cross section;
Step 1-3, formation pipe fitting transition mold former;
Step 1-3-1, with step 1-1 obtain girth and step 1-2 obtain the center of circle do circle, Formation cross-section be circle new threedimensional model, horizontal positioned, connects the center of circle in each cross section of new threedimensional model, forming curves, cross this curve do a horizontal curved surface;
With each perimeter of section for girth, centered by the circle center, each cross section determined above, circular section is set up in cross section one by one, forms the profiled interface of transition state model; Be positioned on horizontal level by part transition state model, be parallel to the curved surface of horizontal positioned as mold parting surface using the round heart in all cross sections of mistake, bus, complete die-face design, mold former as shown in Figure 9.
Step 1-3-2, using new threedimensional model as the groove of pipe fitting transition state grinding tool, using horizontal curved surface as the die joint of pipe fitting transition state grinding tool processing transition state grinding tool.
Step 2, according to pipe fitting transition mold former production and processing pipe fitting transition mould;
Step 3, woollen blank is positioned in pipe fitting transition mould, being filled with highly pressurised liquid makes itself and dies cavity profile fit, then taking-up is put into by the mould inner pressure of modelling shown in Fig. 2 flat, in blank, is again filled with highly pressurised liquid to pad pasting, obtains the final profile of mozzle.
In the development of the mozzle product of certain aircraft engine, according to the method for designing of above-mentioned transition state mould, devise actual mould and verify, fully achieve predetermined design diagram; Actual transition state mould efficiently solves the once-forming splintering problem to final profile, and product processing is stablized, and processing precision of products is improved.
Claims (3)
1. adopt an asymmetric pipe processing method for transition state mould, it is characterized in that, comprise the following steps:
Step 1, according to plumbing dimensions parameter to be processed, design this pipe fitting transition mould, be specially:
Set up the model of transition mould, process is as follows:
The girth in step 1-1, the acquisition each cross section of transition mould;
Step 1-1-1, set up three-dimensional system of coordinate, according to the size of actual pipe fitting different cross section, obtain this cross section curve in the coordinate system, and multiple cross section curve is combined to form the threedimensional model of this pipe fitting;
Step 1-1-2, an addendum surface for sealing respectively is set at the two ends of above-mentioned threedimensional model;
Step 1-1-3, the threedimensional model adding secondary surface vertically ajusted and carries out cross section again, determine the curve in new cross section, and obtain the girth of new cross section curve;
The center of circle in step 1-2, the acquisition each cross section of transition mould;
Step 1-2-1, determine the respective central point of two fillets on the end face of threedimensional model one end, and by above-mentioned two central point lines; Determine the respective central point of two fillets on threedimensional model other end end face, and by above-mentioned two central point lines;
Step 1-2-2, get any one horizontal plane, two central point lines determined in step 1-2-1 are projected on this horizontal plane, forms two cross spiders, and the little angle that above-mentioned cross spider is formed is divided equally, determine the position of angular bisector;
Step 1-2-3, obtain the position of centre of gravity in each new cross section, cross angular bisector and do one perpendicular to the face of horizontal plane, cross the vertical line that center of gravity does this face, obtain the girth of this vertical line side cross section curve and the girth of vertical line opposite side cross section curve respectively, above-mentioned both sides girth is done difference and divided by 2, and then obtain revise side-play amount;
Step 1-2-4, by center of gravity to direction, girth longer side skew, displacement by being tried to achieve side-play amount, the center of circle using the position of centre of gravity after movement as each cross section;
Step 1-3, formation pipe fitting transition mold former;
Circle is done in the center of circle that step 1-3-1, the girth obtained with step 1-1 obtain for girth and step 1-2, Formation cross-section is the new threedimensional model of circle, and horizontal positioned, connects the center of circle in each cross section of new threedimensional model, forming curves, crosses this curve and does a horizontal curved surface;
Step 1-3-2, using new threedimensional model as shape face in pipe fitting transition state mould, using horizontal curved surface as the die joint of pipe fitting transition state mould processing transition morphotype tool;
Step 2, according to pipe fitting transition mold former production and processing pipe fitting transition mould;
Step 3, woollen blank to be positioned in pipe fitting transition mould, to be filled with highly pressurised liquid and itself and dies cavity profile are fitted, then woollen blank is taken out put into and expect that pipe fitting profile mould flattens, and pour highly pressurised liquid at this, namely obtain final pipe fitting.
2. the asymmetric pipe processing method of employing transition state mould according to claim 1, is characterized in that, the secondary surface described in step 1-1-2, and its two ends are cylinder type, and the center of circle of two end sections is positioned on same axis.
3. the asymmetric pipe processing method of employing transition state mould according to claim 1, is characterized in that, the number in the cross section again described in step 1-1-3 is identical with former cross section number.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6032501A (en) * | 1999-02-09 | 2000-03-07 | The Budd Company | Method of hydroforming multi-lateral members from round tubes |
| US6397449B1 (en) * | 1993-08-16 | 2002-06-04 | Vari-Form Inc. | Method for expansion forming of tubing |
| CN101912919A (en) * | 2010-07-16 | 2010-12-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Composite forming method of gas bulging forming and thermal forming and device used by same |
| CN102107244A (en) * | 2009-12-23 | 2011-06-29 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for forming thin-walled parts through stamping and drawing |
| CN202263818U (en) * | 2011-09-05 | 2012-06-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Process equipment for high-pressure forming in turbine blade flow guide tube |
| CN102837436A (en) * | 2012-09-21 | 2012-12-26 | 南车株洲电力机车研究所有限公司 | Integral transitional die for manufacturing glass reinforced plastic wind power engine room and forming process of integral transitional die |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4799812B2 (en) * | 2003-10-07 | 2011-10-26 | 新日本製鐵株式会社 | Tailored tube hydroforming method |
| JP5530168B2 (en) * | 2009-12-22 | 2014-06-25 | 株式会社ベステックスキョーエイ | Pipe member forming method |
-
2013
- 2013-09-30 CN CN201310461559.XA patent/CN103551419B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6397449B1 (en) * | 1993-08-16 | 2002-06-04 | Vari-Form Inc. | Method for expansion forming of tubing |
| US6032501A (en) * | 1999-02-09 | 2000-03-07 | The Budd Company | Method of hydroforming multi-lateral members from round tubes |
| CN102107244A (en) * | 2009-12-23 | 2011-06-29 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for forming thin-walled parts through stamping and drawing |
| CN101912919A (en) * | 2010-07-16 | 2010-12-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Composite forming method of gas bulging forming and thermal forming and device used by same |
| CN202263818U (en) * | 2011-09-05 | 2012-06-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Process equipment for high-pressure forming in turbine blade flow guide tube |
| CN102837436A (en) * | 2012-09-21 | 2012-12-26 | 南车株洲电力机车研究所有限公司 | Integral transitional die for manufacturing glass reinforced plastic wind power engine room and forming process of integral transitional die |
Non-Patent Citations (1)
| Title |
|---|
| 渐变曲面管道CAD的建模与分析;栾蓉等;《河海大学学报(自然科学版)》;20000830;第28卷(第04期);107-111 * |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |