CN204276616U - A kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould - Google Patents
A kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould Download PDFInfo
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- CN204276616U CN204276616U CN201420676118.1U CN201420676118U CN204276616U CN 204276616 U CN204276616 U CN 204276616U CN 201420676118 U CN201420676118 U CN 201420676118U CN 204276616 U CN204276616 U CN 204276616U
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Abstract
The utility model relates to a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould, the mold of this mould is punch, and this mold has the mold shape face of hemisphere face or round table surface, this mold shape face is provided with concave surface, and the position that the corresponding Loadings On Hemispherical Shell wall thickness of the concave surface in this shape face is thinner, the wall thickness of Loadings On Hemispherical Shell effectively can be controlled by the curve distribution designing this shape face, and the gross area in mold shape face is 70% ~ 90% of the bed die shape face gross area, in so downward forming process, slab there will not be excessive tensile, can avoid destroying the product wall thickness controlled well, and there will not be wrinkling, this utility model also adopts link to be connected with the hangers of mold by the auricle of slab, can when high temperature carries out the demoulding, and when lifting mold, link can drive shaping Loadings On Hemispherical Shell, thus produces knockout press, realizes fast demoulding.
Description
Technical field
The utility model relates to super mould, particularly relates to the titanium alloy Loadings On Hemispherical Shell expansive forming mould that a kind of wall thickness is controlled.
Background technology
Spaceborne tank class field of containers at home and abroad, the superplastic forming application of titanium alloy is very extensive.The rocket propulsion research institute in U.S. Edward air base just carries out as far back as the eighties the experimental study that superplastic forming manufactures propellant tank, and test products is Ti6Al4V hemispherical shell, and the mould of employing is the unidirectional expanding die of counterdie with hemispherical die cavity.ISAS and MHI two company of Japan just brought into use SPF Technology to manufacture Tank of Spacecraft from 1981, when manufacturing tank, first by two pieces of plate sheet welding, be blown into hemispherical or conical part by SPF again, the mould of employing is the two-way expanding die of upper/lower die with symmetrical hemispherical die cavity.The typical apply that European Space Agency adopts super molding technology to manufacture tank is in the nineties, and the tank of Ariane 5 attitude control system still adopts this super molding technology manufacture so far.From domestic, adopt the titanium alloy pressure vessel product of superplastic forming manufacture to have also been obtained application, such as 703 certain model ring gas bottle developed adopt superplastic forming method to manufacture.First adopt superplastic gas-bulging method to be shaped titanium alloy semi-ring during shaping, then adopt machining to correct thickness and the shape of semi-ring, be grouped together by two hemisphere finally by electron beam welding, the mould of employing is unidirectional expanding die.625 also adopt superplastic forming to manufacture the titanium alloy tank of various sizes, at home all kinds of satellite model are widely applied.725 adopt the die forming of dynamic punch form to cross titanium alloy hemisphere, can be used for the following different-diameter of φ 800mm, the shaping of different wall titanium alloy spherical shell.
Housing wall thickness after the uncontrollable shaping of above-described various superplastic forming die, and be shaped after housing especially large scale housing is very difficult when High temperature release.
Utility model content
The purpose of this utility model is the above-mentioned defect overcoming prior art, the titanium alloy Loadings On Hemispherical Shell expansive forming mould providing a kind of wall thickness controlled, this mould adopts special-shaped an actor's rendering of an operatic tune for controlling housing wall thickness, and adopts link to realize the high temperature fast demoulding of titanium alloy Loadings On Hemispherical Shell after superplastic forming.
Above-mentioned purpose of the present utility model is achieved by following technical solution:
A kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould, comprise mold, bed die, upper pipeline and lower pipeline, wherein, through mold gas channels is offered between the upper surface of mold and lower surface, through bed die gas channels is offered between the lower surface of bed die and upper surface, upper pipeline and lower pipeline are welded on gas channels respectively, on gas channels, bed die is die, described bed die die has hemispherical bed die shape face, it is characterized in that: mold is punch, and described mold punch has the mold shape face of hemisphere face or round table surface, described mold shape face is provided with concave surface, wherein, the corresponding relation of the Thickness Distribution of described concave surface position and Loadings On Hemispherical Shell product is as follows:
Wherein, the hoop wall thickness of Loadings On Hemispherical Shell product is equal, the unequal and even transition of axial wall thickness, wherein, along the central axial direction pointed to bottom Loadings On Hemispherical Shell, the region of the axial wall thickness monotone decreasing of Loadings On Hemispherical Shell product is region A, and hemisphere product wall thickness monotonically increasing region is region B; Be concave surface at the region A of Loadings On Hemispherical Shell product to the position, mold shape face that region B transition position is corresponding.
Above-mentioned titanium alloy Loadings On Hemispherical Shell expansive forming mould, the concave surface degree of depth on mold shape face and the ratio r adio=1-d of width
0/ δ
b, wherein d
0for the hoop wall thickness of region A on the Loadings On Hemispherical Shell that described concave surface is corresponding and B junction, region, δ
bfor slab thickness.
Above-mentioned titanium alloy Loadings On Hemispherical Shell expansive forming mould; when mold shape face is round table surface; adopt arc surface transition between described round table surface bottom surface and frustum cone side, make described mold punch benchmark shape face rounding off throughout, the radius of curvature of described arc surface is greater than slab thickness δ
b.
Above-mentioned titanium alloy Loadings On Hemispherical Shell expansive forming mould, the gross area in mold shape face is 70% ~ 90% of the gross area in bed die shape face.
Above-mentioned titanium alloy Loadings On Hemispherical Shell expansive forming mould, also comprise link, the outer surface of mold is provided with hangers, and slab periphery is processed with auricle, and described hangers is corresponding with the position of auricle, and described link is enclosed within hangers and auricle.
Above-mentioned titanium alloy Loadings On Hemispherical Shell expansive forming mould, the sidewall of mold and bed die offers respectively mold thermometer hole and bed die thermometer hole.
Above-mentioned titanium alloy Loadings On Hemispherical Shell expansive forming mould, the lower surface of mold upper surface and bed die offers mold T-slot and bed die T-slot respectively.
Above-mentioned titanium alloy Loadings On Hemispherical Shell expansive forming mould, mold outer surface and bed die outer surface are respectively equipped with mold hanger and bed die hanger.
The utility model compared with prior art has following beneficial effect:
1, can be controlled the wall thickness of Loadings On Hemispherical Shell by the shape face of mold, the wall thickness of the Loadings On Hemispherical Shell that the concave surface in this shape face is corresponding is thin;
2, the gross area arranging mold shape face is less than the area in bed die shape face, and in so downward forming process, slab there will not be excessive tensile, can avoid destroying the product wall thickness controlled well, and there will not be wrinkling;
3, link is adopted to be connected with the hangers of mold by the auricle of slab, can when high temperature to carry out the demoulding, when lifting mold, link can drive shaping Loadings On Hemispherical Shell, thus produces knockout press, realizes fast demoulding.
Accompanying drawing explanation
Fig. 1 is the structural perspective of expansive forming mould of the present utility model;
Fig. 2 is the structure front view of expansive forming mould of the present utility model;
Fig. 3 is the structure top view of expansive forming mould of the present utility model;
Fig. 4 is the sectional view in expansive forming mould of the present utility model D-D direction in figure 3;
Fig. 5 is the sectional view in expansive forming mould of the present utility model C-C direction in figure 3;
Fig. 6 is the Loadings On Hemispherical Shell that expansive forming mold releasability of the present utility model obtains;
Fig. 7 is the connection diagram of expansive forming mould of the present utility model when the demoulding;
Fig. 8 is the corresponding relation schematic diagram between the Thickness Distribution of Loadings On Hemispherical Shell in embodiment and mold profile curve.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The three-dimensional structure diagram of expansive forming mould of the present utility model as shown in Figure 1, the structure front view of the expansive forming mould of the present utility model shown in Fig. 2, a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould, comprise mold 1, bed die 2, upper pipeline 3, lower pipeline 4 and link 5, wherein, mold 1 is provided with mold hanger 6, mold T-slot 8, hangers 9 and mold thermometer hole 11, and bed die 2 is provided with bed die hanger 7, bed die T-slot 10 and bed die thermometer hole 12.
Analyse and observe according to the D-D direction in the attached view of structure of the expansive forming mould of the present utility model shown in Fig. 3, its sectional view as shown in Figure 4, as can be seen from this sectional view, through mold gas channels 13 is offered between the upper surface of mold 1 and lower surface, and the upper surface of bed die 2 and lower surface offer bed die gas channels 14, wherein, upper pipeline 3 is welded in mold gas channels 13, and lower pipeline 4 is welded in bed die gas channels 14; Bed die 2 has semicircle ball-type shape face 16, and mold 1 has the shape face 15 of hemisphere face or the round table surface being provided with concave surface.
Analyse and observe according to the C-C direction in the attached view of structure of the expansive forming mould of the present utility model shown in Fig. 3, its sectional view as shown in Figure 5, as can be seen from Figure, the outer wall of mold 1 offers mold thermometer hole 11, the outer wall of bed die 2 offers bed die thermometer hole 12.
The utility model can carry out the expansive forming demoulding to the TC4 titanium alloy plate meeting GJB2505A-2008, obtain Loadings On Hemispherical Shell 18 as shown in Figure 6, wherein, need to process auricle 17 to the periphery of original slab before carrying out the demoulding, the connection diagram of expansive forming mould when the demoulding as shown in Figure 7, the position one_to_one corresponding of hangers 9 on the position of this auricle 17 and mold, link 5 is hung on the corresponding hangers in position and auricle, when high temperature carries out the demoulding, lift mold 1, link 5 can drive shaping Loadings On Hemispherical Shell, thus generation knockout press, realize fast demoulding.
Equal and the axial wall thickness of the wall thickness of hoop everywhere of the Loadings On Hemispherical Shell 18 that the utility model demoulding obtains is not etc., wherein, the principle realizing wall thickness control is as follows: when the incipient stage, mold pressed down, and slab generally can not be thinning or thinning very little, and now slab keeps original thickness substantially, start to occur that stretching is thinning to slab during mold bulging, the position first contacted with mould shape face due to the thinning degree of effect of frictional force little, the thinning degree in position contacted with mould shape face is afterwards large, the material position elder generation that expectation therefore should be made thicker and contacting dies, expect behind thinning position with contacting dies, different according to the degree of product thin and thick everywhere, position difference designs the concave surface in mold shape face 15, the position that wherein concave surface corresponding product is thinner, wherein concave region width is a bit larger tham chord length corresponding to product thin location, the degree of depth of concave region and width are than radio=1-(expecting thickness/material stock thickness), and can finite element emulation software be adopted, such as MARC, the curve to mold shape face 15 such as ANSYS is optimized design.
Bed die shape face 16 is mainly used to control hemisphere form accuracy, less on wall thickness impact.The gross area in mold shape face 15 is 70% ~ 90% of the bed die shape face gross area, and in so downward forming process, slab there will not be excessive tensile, avoids destroying the product wall thickness controlled well, and there will not be wrinkling.
Embodiment:
Adopt expansive forming mould of the present utility model to carry out the demoulding to the TC4 titanium alloy plate meeting GJB2505A-2008 in this embodiment and obtain the Loadings On Hemispherical Shell that diameter is 1000mm, equal and the axial wall thickness of hoop wall thickness is not etc. everywhere for this Loadings On Hemispherical Shell, wherein the opening part wall thickness of this Loadings On Hemispherical Shell requires 9mm, ball top place wall thickness requires 9mm, in the middle part of hemisphere, wall thickness requires 4mm, uniform wall thickness transition everywhere.
In the present embodiment, expansive forming mould of the present utility model comprises mold, bed die, upper pipeline, lower pipeline and 8 links, wherein, upper pipeline is welded on mold gas channels, argon gas can be squeezed into by this upper pipeline in cavity body of mould after pad pasting, slab is shaped to bed die direction and is blown into compressed air, and after housing molding, in cavity body of mould, Compressed Gas is squeezed into by this upper pipeline, making it shrink for cooling the Loadings On Hemispherical Shell be shaped, reducing bed die to the restraining force of housing; Lower pipeline is welded on bed die gas channels, can squeeze into argon gas when high temperature superplastic forming by this lower pipeline in cavity body of mould, and slab is shaped to mold direction.
In the present embodiment, the slab putting into mould is processed with 8 auricles, with the hangers position one_to_one corresponding of 8 on mold, when High temperature release, 8 links is tangled auricle and hangers one to one respectively.
Mold profile in the present embodiment designs according to the wall thickness designing requirement of Loadings On Hemispherical Shell, on the shape face 15 of mold, concave surface is set to corresponding to wall thickness thin location in the middle part of semispherical wall, corresponding relation between the Thickness Distribution of Loadings On Hemispherical Shell and mold profile curve as shown in Figure 8, wherein hemisphere medium position arranges concave surface, and the radius of curvature of this concave surface is 100mm.
In the present embodiment, the outer wall of mold 1 is offered a thermometer hole, and be provided with 3 thermometer holes from top to bottom altogether on the outer wall of bed die, for carrying out Real-Time Monitoring to the temperature of mould in knockout course.
The content be not described in detail in the utility model description belongs to the known technology of professional and technical personnel in the field.
Claims (8)
1. a titanium alloy Loadings On Hemispherical Shell expansive forming mould, comprise mold (1), bed die (2), upper pipeline (3) and lower pipeline (4), wherein, through mold gas channels (13) is offered between the upper surface of mold (1) and lower surface, through bed die gas channels (14) is offered between the lower surface of bed die (2) and upper surface, upper pipeline (3) and lower pipeline (4) are welded on gas channels (13) respectively, on gas channels (14), bed die (2) is die, described bed die die has hemispherical bed die shape face (16), it is characterized in that: mold (1) is punch, and described mold punch has the mold shape face (15) of hemisphere face or round table surface, described mold shape face (15) is provided with concave surface, wherein, the corresponding relation of the Thickness Distribution of described concave surface position and Loadings On Hemispherical Shell product is as follows:
Wherein, the hoop wall thickness of Loadings On Hemispherical Shell product is equal, the unequal and even transition of axial wall thickness, wherein, along the central axial direction pointed to bottom Loadings On Hemispherical Shell, the region of the axial wall thickness monotone decreasing of Loadings On Hemispherical Shell product is region A, and hemisphere product wall thickness monotonically increasing region is region B; Be concave surface at the region A of Loadings On Hemispherical Shell product to mold shape face (15) position that region B transition position is corresponding.
2. a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould according to claim 1, is characterized in that: the concave surface degree of depth on mold shape face (15) and the ratio r adio=1-d of width
0/ δ
b, wherein d
0for the hoop wall thickness of region A on the Loadings On Hemispherical Shell that described concave surface is corresponding and B junction, region, δ
bfor slab thickness.
3. a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould according to claim 1; it is characterized in that: when mold shape face (15) is for round table surface; arc surface transition is adopted between described round table surface bottom surface and frustum cone side; make described mold punch benchmark shape face rounding off throughout, the radius of curvature of described arc surface is greater than slab thickness δ
b.
4. a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould according to claim 1, is characterized in that: the gross area in mold shape face (15) is 70% ~ 90% of the gross area in bed die shape face (16).
5. a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould according to claim 1, it is characterized in that: also comprise link (5), the outer surface of mold (1) is provided with hangers (9), and slab periphery is processed with auricle (17), described hangers (9) is corresponding with the position of auricle (17), and described link (5) is enclosed within hangers (9) and auricle (17).
6. a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould according to claim 1, is characterized in that: the sidewall of mold (1) and bed die (2) offers respectively mold thermometer hole (11) and bed die thermometer hole (12).
7. a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould according to claim 1, is characterized in that: the lower surface of mold (1) upper surface and bed die (2) offers mold T-slot (8) and bed die T-slot (10) respectively.
8. a kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould according to claim 1, is characterized in that: mold (1) outer surface and bed die (2) outer surface are respectively equipped with mold hanger (6) and bed die hanger (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676118.1U CN204276616U (en) | 2014-11-06 | 2014-11-06 | A kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676118.1U CN204276616U (en) | 2014-11-06 | 2014-11-06 | A kind of titanium alloy Loadings On Hemispherical Shell expansive forming mould |
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| CN204276616U true CN204276616U (en) | 2015-04-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108057758A (en) * | 2017-12-08 | 2018-05-22 | 航天材料及工艺研究所 | A kind of superplasticity isothermal stamping process of TA7 titanium alloys thick spherical shell |
| CN112246915A (en) * | 2020-09-25 | 2021-01-22 | 中国航空制造技术研究院 | Titanium alloy hemispherical shell shape correction device and shape correction method thereof |
| CN113909368A (en) * | 2021-09-02 | 2022-01-11 | 航天材料及工艺研究所 | Precision and performance control method for superplastic forming of abrupt-change wall-thickness thin-wall hemisphere |
| CN117283304A (en) * | 2023-10-08 | 2023-12-26 | 河北志成束源科技有限公司 | Superplastic forming die and using method thereof |
-
2014
- 2014-11-06 CN CN201420676118.1U patent/CN204276616U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108057758A (en) * | 2017-12-08 | 2018-05-22 | 航天材料及工艺研究所 | A kind of superplasticity isothermal stamping process of TA7 titanium alloys thick spherical shell |
| CN112246915A (en) * | 2020-09-25 | 2021-01-22 | 中国航空制造技术研究院 | Titanium alloy hemispherical shell shape correction device and shape correction method thereof |
| CN112246915B (en) * | 2020-09-25 | 2022-01-07 | 中国航空制造技术研究院 | Titanium alloy hemispherical shell shape correction device and shape correction method thereof |
| CN113909368A (en) * | 2021-09-02 | 2022-01-11 | 航天材料及工艺研究所 | Precision and performance control method for superplastic forming of abrupt-change wall-thickness thin-wall hemisphere |
| CN117283304A (en) * | 2023-10-08 | 2023-12-26 | 河北志成束源科技有限公司 | Superplastic forming die and using method thereof |
| CN117283304B (en) * | 2023-10-08 | 2024-06-18 | 河北志成束源科技有限公司 | Superplastic forming die and using method thereof |
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