CN106903205A - A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in termination - Google Patents
A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in termination Download PDFInfo
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- CN106903205A CN106903205A CN201710265918.2A CN201710265918A CN106903205A CN 106903205 A CN106903205 A CN 106903205A CN 201710265918 A CN201710265918 A CN 201710265918A CN 106903205 A CN106903205 A CN 106903205A
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- stainless steel
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- flanged
- flgd
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in termination, manufacture first includes the mould of core, spinning roller and tail top, boss is designed in core end, uniform multiple keyway on boss, equally distributed four spinning rollers are installed on spinning machine, and two relative spinning rollers are located in approximately the same plane, two neighboring spinning roller is respectively in axial direction with radially mistake away from distribution.Then processing stainless steel cylindrical blank, and process convex step in blank afterbody, processes through slot on convex step, convex step matches with the boss of core end, and the keyway position one-to-one corresponding on through slot and mould.Key block, and fixed key block and core are placed in each through slot and its corresponding keyway, tail top is held out against into core.Main axis are controlled by spinning machine, and controls spinning roller extrusion billet, realize the seamless mould pressing of stainless-steel pipe.The present invention improves forming quality, precision and reliability, can manufacture the stainless steel straight tube that place's wall thickness is not waited, and improves structural design optimization nargin.
Description
Technical field
It is Technology of Plastic Processing the present invention relates to a kind of flanged (FLGD) stainless steel seamless pipe spin forming method in termination, category
In the seamless duct forming field of rocket.
Background technology
With the development of space technology, to Aerospace manufacturing reliability requirement more and more higher, various monolithic moldings are also promoted
The application of new technology, metal plate integral spinning forming technology occupies very important status in aerospace industry.Termination is flanged (FLGD)
Stainless steel pipe is the important component of Rocket tank pipeline, is the transfer passage of rocket-powered use propellant, conventional method
Forming technology is welded by stainless-steel roll and realizes that stainless steel straight tube shapes, forming quality is not high, and the method has longitudinal seam,
In fuel -supply pipe structure design, there is larger security risk in longitudinal seam, and pipeline is more long, and risk is bigger.In addition, the party
Method causes structure efficiency not high, is unfavorable for model loss of weight.Preferable pipe structure is that weld zone thickness is larger, and non-solder area is thick
Degree is relatively thin.Coiling welded forming technology such as can manufacture at the delivery pipe of wall thickness, but cannot efficiently manufacture thickness delivery pipe not etc., limit
Structural design optimization nargin is made.
The content of the invention
Technology solve problem of the invention is：Overcome the deficiencies in the prior art, there is provided a kind of flanged (FLGD) stainless steel in termination
Seamless pipe spin forming method, improves forming quality, precision and reliability, while the stainless steel that wall thickness is not waited can be produced
Straight tube, improves structural design optimization nargin.
Technical solution of the invention is：A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in termination, including
Following steps：
(1) mould is manufactured, the mould includes core, spinning roller and tail top, and core end is designed with a boss, on boss
N number of keyway is evenly equipped with, N is the even number more than 4, and core is sleeved on the main shaft of spinning machine, tail top is arranged on spinning machine
On tailstock；Four spinning rollers are installed, four spinning rollers are uniformly distributed on spinning machine, two relative spinning rollers are located at approximately the same plane
Interior, two adjacent spinning rollers are respectively in axial direction with radially mistake away from distribution；
(2) processing stainless steel cylindrical blank, and convex step is processed in blank afterbody, it is machined with N on the convex step
Individual through slot, stainless steel cylindrical blank is sleeved on core, after being set with place, the boss of the convex step and core end
Match, and N number of through slot is corresponding with the N number of keyway position on mould；
(3) key block, and fixed key block and core are placed in each through slot and its corresponding keyway, tail top is held out against into core
Mould；
(4) main axis are controlled by spinning machine, and controls spinning roller extrusion billet, it is ensured that the pressure at stainless steel straight tube two ends
Lower amount is less than the drafts of remainder, realizes the seamless mould pressing of the flanged stainless steel straight tube in termination.
Four spinning roller structure snd size are identical in the step (1), are biconical surface structure, and spinning roller anterior angle is little
In 25 °, relief angle is not more than 18 °.
The spinning roller radius of clean-up is 6-10mm.
In the step (2) during processing stainless steel cylindrical blank, the inner diameter deviation for controlling stainless steel cylindrical blank is 0.03-
0.08mm。
Adjacent passage spinning gap width is L+l, and wherein L is theoretical drafts, and l is the springback capacity of material deformation.
Compared with prior art, the present invention has the advantages that：
(1) present invention passes through four spinning roller uniform layouts, it is ensured that producing balanced forces of the blank in spinning process；It is right two-by-two
The stepped spinning of wheel, meets linearity and the circularity requirement of processing, it is ensured that thin-wall stainless steel conduit high accuracy, high reliability
Shaping.
(2) present invention, by the design of keyway and key block, limits circumference of the blank with respect to core on core and blank
Rotate, coordinated by core and blank top bar, realize the constraint of blank axial direction, so as to ensure that positive stabilization spinning.
(3) the inventive method realizes the seamless shaping of stainless steel tube, improves the reliability of forming quality and stainless steel tube
Property, while the end of shaping keeps former sotck thinkness, remaining local spinning is thinning, straight so as to obtain the stainless steel that wall thickness do not wait
Pipe, improves structural design optimization nargin, is easy to model loss of weight.
Brief description of the drawings
Fig. 1 is flow chart of the present invention；
Fig. 2 is the stainless steel straight tube schematic diagram after shaping；
Fig. 3 is four schematic diagrames of spinning roller, wherein (a) is radially wrong away from schematic diagram, (b) is axial direction mistake according to schematic diagram, (c)
It is spinning roller front view, (d) is spinning roller left view；
Fig. 4 is core schematic diagram, wherein (a) is sleeved on the schematic diagram on the main shaft of spinning machine for core, (b) is core
End enlarged diagram；
Fig. 5 is blank structure design diagram before spinning, wherein (a) is the schematic diagram that blank afterbody processes convex step,
B () is the schematic diagram that through slot is processed on convex step.
Specific embodiment
To consider the medium corrosion resistance and high reliability of pipeline and propellant storage for a long time, long-term filling storage in 10 years is met
Demand is deposited, as shown in figure 1, the present invention proposes a kind of flanged (FLGD) stainless steel seamless pipe spin forming method in termination, specific steps
It is as follows：
(1) mould is manufactured：
The mould includes core, spinning roller and tail top, and core end is designed with a boss, N number of keyway is evenly equipped with boss,
N is the even number more than 4, and core is sleeved on the main shaft of spinning machine, and tail top is arranged on the tailstock of spinning machine.Fig. 4 is core
Mould schematic diagram, wherein (a) is sleeved on the schematic diagram on the main shaft of spinning machine for core, (b) is core end enlarged diagram.
Four spinning rollers are installed, two relative spinning rollers are radially disposed in approximately the same plane, adjacent two on spinning machine
Spinning roller is respectively in axial direction and radially wrong away from distribution.Four spinning roller structure snd size are identical, are biconical surface structure, and spinning roller
Anterior angle is not more than 25 °, and relief angle is not more than 18 °.For thin-wall tube-shaped shear spinning, to ensure the flow forward of material settling out, rotation
Wheel radius is difficult excessive, and to set the spinning roller radius of clean-up be 6-10mm to the present invention.Four schematic diagrames of spinning roller are illustrated in figure 3, its
In (a) be radially wrong away from schematic diagram, (b) is axially wrong according to schematic diagram, and (c) is spinning roller front view, and (d) is spinning roller left view.
(2) processing stainless steel cylindrical blank：
For tubular shear spinning, dextrorotation is easier flowing and the forming quality of control material, in order to reduce base as far as possible
In the case of material wall thickness, the positive stabilization spinning of realization, the present invention processes convex step, adds on the convex step in blank afterbody
Work has N number of through slot, and stainless steel cylindrical blank is sleeved on core, and after being set with place, convex step is convex with core end
Platform matches, and N number of through slot is corresponding with the N number of keyway position on mould.The deviation of blank circularity directly affects spinning part
Quality, in order to strictly control the internal diameter size precision of cylindrical blank, the inner diameter deviation for controlling stainless steel cylindrical blank is 0.03-
0.08mm.Fig. 5 is blank structure design diagram before spinning, wherein (a) is the schematic diagram that blank afterbody processes convex step,
B () is the schematic diagram that through slot is processed on convex step.
(3) key block is placed in each through slot and its corresponding keyway, and key block and core, limitation is fixed by screw
Blank circumferentially rotating with respect to core.Tail top is held out against into core；
(4) main axis are controlled by spinning machine, and controls spinning roller extrusion billet, realized by m passages stepped spinning
The seamless mould pressing of stainless steel straight tube, m is more than or equal to 1.Spinning roller extrusion billet ensures that the drafts at stainless steel straight tube two ends will
Less than the drafts of remainder, termination flange is formed.Stainless steel straight tube after shaping is as shown in Figure 2.
To realize the forward flow forming of barrel-type casing, the present invention devises step and keyway-key block structure in core end；For
Blank unstability when avoiding spinning, using four spinning rollers object stepped spinning two-by-two, while the end of shaping keeps former sotck thinkness.For
Prevent blank relative to the rotation of mandrel, multiple groove structures are designed in blank afterbody ring；According to material forming characteristic, carry out
Passage deformation design, total deformation is no more than material deformation limit；In combination with material rebounds, determine that material spinning gap sets
It is fixed.
The inventive method is balanced to stress, improve forming quality and essence by the synchronous stepped spinning technique of wheel
Degree.
Embodiment：
As a example by processing wall thickness for the stainless-steel seamless pipe of 1.5-1.8mm：
(1) mould is manufactured, 6 keyways is evenly equipped with its core mould lug bosses at end part, the spinning roller radius of clean-up is 8mm.
(2) processing stainless steel cylindrical blank, blank afterbody is machined with the convex step of 2-4mm, and 6 are machined with convex step
Individual through slot, 6 through slots are corresponding with 6 keyway positions on mould.Selection stainless steel tubular sotck thinkness is 6mm, control
The inner diameter deviation of stainless steel cylindrical blank processed is 0.03-0.08mm.
(3) key block is placed in each through slot and its corresponding keyway, and key block and core is fixed by screw.By tail
Hold out against core.
(4) main axis are controlled by spinning machine, and controls spinning roller extrusion billet.
Because stainless steel maximum deformation quantity is not more than 80%, the total deformation of blank is set in 70%, root by the present embodiment
It is two passage stepped spinnings by deformation design according to constancy of volume and material rebounds, then every time deflection is not more than 50%.
Analyzed according to material property and tested, the springback capacity l of stainless steel material deformation is 0.2-0.4mm, thus according to material
Expect final wall thickness 1.5-1.8mm to design adjacent passage spinning gap width for 2.3-2.65mm.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (5)
1. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of termination, it is characterised in that comprise the following steps：
(1) mould is manufactured, the mould includes core, spinning roller and tail top, and core end is designed with a boss, uniform on boss
There is N number of keyway, N is the even number more than 4, and core is sleeved on the main shaft of spinning machine, tail top is arranged on the tailstock of spinning machine
On；Four spinning rollers are installed, four spinning rollers are uniformly distributed on spinning machine, two relative spinning rollers are located in approximately the same plane, phase
Two adjacent spinning rollers are respectively in axial direction with radially mistake away from distribution；
(2) processing stainless steel cylindrical blank, and convex step is processed in blank afterbody, it is machined with N number of passing through on the convex step
Groove, stainless steel cylindrical blank is sleeved on core, suit in place after, the boss phase of the convex step and core end
Match somebody with somebody, and N number of through slot is corresponding with the N number of keyway position on mould；
(3) key block, and fixed key block and core are placed in each through slot and its corresponding keyway, tail top is held out against into core；
(4) main axis are controlled by spinning machine, and controls spinning roller extrusion billet, it is ensured that the drafts at stainless steel straight tube two ends
The drafts of remainder is less than, the seamless mould pressing of the flanged stainless steel straight tube in termination is realized.
2. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of termination according to claim 1, it is characterised in that：
Four spinning roller structure snd size are identical in the step (1), are biconical surface structure, and spinning roller anterior angle is not more than 25 °, after
Angle is not more than 18 °.
3. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of termination according to claim 2, it is characterised in that：
The spinning roller radius of clean-up is 6-10mm.
4. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of termination according to claim 1, it is characterised in that：
In the step (2) during processing stainless steel cylindrical blank, the inner diameter deviation for controlling stainless steel cylindrical blank is 0.03-0.08mm.
5. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of termination according to claim 1, it is characterised in that：
Adjacent passage spinning gap width is L+l, and wherein L is theoretical drafts, and l is the springback capacity of material deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265918.2A CN106903205B (en) | 2017-04-21 | 2017-04-21 | A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265918.2A CN106903205B (en) | 2017-04-21 | 2017-04-21 | A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in end |
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| Publication Number | Publication Date |
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| CN106903205A true CN106903205A (en) | 2017-06-30 |
| CN106903205B CN106903205B (en) | 2018-12-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108127014A (en) * | 2017-12-06 | 2018-06-08 | 西安航天动力机械有限公司 | A kind of method away from reversed spinning wrong to wheel |
| CN108971341A (en) * | 2018-08-16 | 2018-12-11 | 安徽信息工程学院 | A kind of steel flange processing mold and its processing method |
| CN110548797A (en) * | 2019-09-16 | 2019-12-10 | 芜湖西诺普汽车零部件科技有限公司 | Coreless spinning processing method for large-proportion multi-time reducing hollow shaft |
| CN111408650A (en) * | 2020-03-24 | 2020-07-14 | 华南理工大学 | Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part |
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| CN105945117A (en) * | 2016-05-10 | 2016-09-21 | 南京航空航天大学 | Strong spinning-forming method and device for high-temperature alloy reducer |
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Patent Citations (5)
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| JP2007268571A (en) * | 2006-03-31 | 2007-10-18 | Nippon Spindle Mfg Co Ltd | Drawing method and apparatus |
| JP2010036206A (en) * | 2008-08-04 | 2010-02-18 | Nippon Spindle Mfg Co Ltd | Plastic working method and apparatus therefor |
| CN202591341U (en) * | 2012-05-11 | 2012-12-12 | 西北工业大学 | Forward spinning mechanism for cylindrical piece |
| CN105107915A (en) * | 2015-09-14 | 2015-12-02 | 航天材料及工艺研究所 | Technological method for precise spinning forming of large magnesium alloy thin-walled cylindrical part |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108127014A (en) * | 2017-12-06 | 2018-06-08 | 西安航天动力机械有限公司 | A kind of method away from reversed spinning wrong to wheel |
| CN108127014B (en) * | 2017-12-06 | 2019-05-31 | 西安航天动力机械有限公司 | The wrong method away from reversed spinning of a kind of pair of wheel |
| CN108971341A (en) * | 2018-08-16 | 2018-12-11 | 安徽信息工程学院 | A kind of steel flange processing mold and its processing method |
| CN110548797A (en) * | 2019-09-16 | 2019-12-10 | 芜湖西诺普汽车零部件科技有限公司 | Coreless spinning processing method for large-proportion multi-time reducing hollow shaft |
| CN110548797B (en) * | 2019-09-16 | 2020-07-07 | 芜湖西诺普汽车零部件科技有限公司 | Coreless spinning processing method for large-proportion multi-time reducing hollow shaft |
| CN111408650A (en) * | 2020-03-24 | 2020-07-14 | 华南理工大学 | Current-assisted composite spinning forming device and method for deep cup-shaped thin-wall part |
| WO2021189824A1 (en) * | 2020-03-24 | 2021-09-30 | 华南理工大学 | Deep-cup-shaped thin-wall part current auxiliary composite spinning forming device and method |
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| Publication number | Publication date |
|---|---|
| CN106903205B (en) | 2018-12-21 |
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