CN106903205B - A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in end - Google Patents
A kind of flanged (FLGD) stainless steel seamless pipe spin forming method in end Download PDFInfo
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- CN106903205B CN106903205B CN201710265918.2A CN201710265918A CN106903205B CN 106903205 B CN106903205 B CN 106903205B CN 201710265918 A CN201710265918 A CN 201710265918A CN 106903205 B CN106903205 B CN 106903205B
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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 end, mold of the manufacture including core model, spinning roller and tail top first, boss is designed in core model end, uniformly distributed multiple keyways on boss, equally distributed four spinning rollers are installed on spinning machine, and two opposite spinning rollers are located in the same plane, two neighboring spinning roller is respectively in axial direction with radial mistake away from distribution.Then processing stainless steel cylindrical blank, and convex step is processed in blank tail portion, through slot is processed on convex step, convex step and the boss of core model end match, and the keyway position on through slot and mold corresponds.Key block, and fixed key block and core model are placed in each through slot and its corresponding keyway, and tail top is held out against into core model.Main axis is controlled by spinning machine, and controls spinning roller extrusion billet, realizes 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 does not wait, improve structural design optimization nargin.
Description
Technical field
The present invention relates to a kind of flanged (FLGD) stainless steel seamless pipe spin forming methods in end, are Technology of Plastic Processing, belong to
In the seamless duct forming field of rocket.
Background technique
With the development of space technology, higher and higher to Aerospace manufacturing reliability requirement, also promote various monolithic moldings
The application of new technology, metal plate integral spinning forming technology play a very important role in aerospace industry.End is flanged (FLGD)
Stainless steel pipe is the important component of Rocket tank pipeline, is the rocket-powered transfer passage with propellant, conventional method
Forming technology, which is welded, by stainless-steel roll realizes the forming of stainless steel straight tube, forming quality is not high, and this method is there are longitudinal seam,
In the design of fuel -supply pipe structure, for longitudinal seam there are biggish security risk, pipeline is longer, 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 welding section thickness is larger, and non-solder area is thick
It spends relatively thin.Coiling welded forming technology such as can manufacture at the delivery pipe of wall thickness, but can not efficiently manufacture delivery pipe of varying thickness, limit
Structural design optimization nargin is made.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of flanged (FLGD) stainless steel in end
Seamless pipe spin forming method improves forming quality, precision and reliability, while can produce the stainless steel of wall thickness not etc.
Straight tube improves structural design optimization nargin.
The technical solution of the invention is as follows: a kind of flanged (FLGD) stainless steel seamless pipe spin forming method in end, including
Following steps:
(1) mold is manufactured, the mold includes core model, spinning roller and tail top, and core model end, which is designed, a boss, on boss
It is evenly equipped with N number of keyway, N is the even number greater than 4, and core model is sleeved on the main shaft of spinning machine, and tail top is mounted on spinning machine
On tailstock；Four spinning rollers are installed, four spinning rollers are uniformly distributed, and two opposite spinning rollers are located at approximately the same plane on spinning machine
Interior, two adjacent spinning rollers are respectively in axial direction with radial mistake away from distribution；
(2) processing stainless steel cylindrical blank, and convex step is processed in blank tail portion, N is machined on the convex step
Stainless steel cylindrical blank is sleeved on core model by a through slot, after being set in place, the boss of the convex step and core model end
Match, and N number of through slot is corresponding with N number of keyway position on mold；
(3) key block, and fixed key block and core model are placed in each through slot and its corresponding keyway, and tail top is held out against into core
Mould；
(4) main axis is controlled by spinning machine, and controls spinning roller extrusion billet, it is ensured that the pressure at stainless steel straight tube both ends
Lower amount is less than the drafts of rest part, realizes seamless mould pressing of the end with flange stainless steel straight tube.
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 working radius is 6-10mm.
In the step (2) when processing stainless steel cylindrical blank, the inner diameter deviation of control 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 invention has the following beneficial effects:
(1) present invention ensure that producing balanced forces of the blank in spinning process by four spinning roller uniform layouts；It is right two-by-two
The stepped spinning of wheel meets straightness and the circularity requirement of processing, ensure that thin-wall stainless steel conduit high-precision, high reliability
Forming.
(2) present invention, by the design of keyway and key block, limits circumferential direction of the blank with respect to core model on core model and blank
Rotation is cooperated by core model and blank top bar, realizes the constraint of blank axial direction, to ensure that positive stable spinning.
(3) the method for the present invention realizes the seamless forming of stainless steel tube, improves the reliable of forming quality and stainless steel tube
Property, while the end of forming keeps former sotck thinkness, remaining local spinning is thinned, so that it is straight to obtain the stainless steel that wall thickness does not wait
Pipe, improves structural design optimization nargin, is convenient for model loss of weight.
Detailed description of the invention
Fig. 1 is flow chart of the present invention；
Fig. 2 is the stainless steel straight tube schematic diagram after forming；
Fig. 3 is the schematic diagram of four spinning rollers, wherein (a) is radial mistake away from schematic diagram, it is (b) axial mistake away from schematic diagram, (c)
It (d) is spinning roller left view for spinning roller main view；
Fig. 4 is core model schematic diagram, wherein (a) is that core model is sleeved on the schematic diagram on the main shaft of spinning machine, it (b) is core model
End enlarged diagram；
Fig. 5 is blank structure design diagram before spinning, wherein (a) is the schematic diagram that blank tail portion processes convex step,
(b) schematic diagram to process through slot on convex step.
Specific embodiment
For medium corrosion resistance and high reliability that consideration pipeline and propellant are stored for a long time, meets 10 years long-term filling and store
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 end, specific steps
It is as follows:
(1) mold is manufactured:
The mold includes core model, spinning roller and tail top, and the design of core model end has a boss, is evenly equipped with N number of keyway on boss,
N is the even number greater than 4, and core model is sleeved on the main shaft of spinning machine, and tail top is mounted on the tailstock of spinning machine.Fig. 4 is core
Mould schematic diagram, wherein (a) is that core model is sleeved on the schematic diagram on the main shaft of spinning machine, it (b) is core model end enlarged diagram.
Four spinning rollers are installed on spinning machine, two opposite spinning rollers are radially disposed in approximately the same plane, and adjacent two
Spinning roller is respectively in axial direction and radial mistake is 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, for the flow forward for guaranteeing material settling out, rotation
Wheel radius is not easy excessive, and the present invention sets spinning roller working radius as 6-10mm.It is illustrated in figure 3 the schematic diagram of four spinning rollers,
In (a) be radial mistake away from schematic diagram, be (b) axial mistake away from schematic diagram, (c) be spinning roller main view, (d) be spinning roller left view.
(2) processing stainless steel cylindrical blank:
For tubular shear spinning, dextrorotation is easier to control flowing and the forming quality of material, in order to reduce base as far as possible
In the case where material wall thickness, positive stable spinning is realized, the present invention processes convex step in blank tail portion, adds on the convex step
Work has N number of through slot, and stainless steel cylindrical blank is sleeved on core model, and after being set in place, convex step is convex with core model end
Platform matches, and N number of through slot is corresponding with N number of keyway position on mold.The deviation of blank circularity directly affects spinning part
Quality, for the internal diameter precision of strict control 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 tail portion processes convex step,
(b) schematic diagram to process through slot on convex step.
(3) key block is placed in each through slot and its corresponding keyway, and passes through the fixed key block of screw and core model, limitation
Blank circumferentially rotating with respect to core model.Tail top is held out against into core model；
(4) main axis is controlled by spinning machine, and controls spinning roller extrusion billet, realized by m passage stepped spinning
The seamless mould pressing of stainless steel straight tube, m are more than or equal to 1.Spinning roller extrusion billet guarantees that the drafts at stainless steel straight tube both ends is wanted
Less than the drafts of rest part, end flange is formed.Stainless steel straight tube after forming is as shown in Figure 2.
For the forward flow forming for realizing barrel-type casing, the present invention devises step and keyway-key block structure in core model end；For
Blank unstability when avoiding spinning, using four spinning rollers object stepped spinning two-by-two, while the end shaped keeps former sotck thinkness.For
Rotation of the blank relative to mandrel is prevented, circumferential direction is designed to multiple groove structures in blank tail portion；According to material forming characteristic, carry out
Passage deformation design, total deformation are no more than material deformation limit；In combination with material rebounds, determine that material spinning gap is set
It is fixed.
For the method for the present invention by taking turns synchronous stepped spinning technique, balanced opposite stress improves forming quality and essence
Degree.
Embodiment:
For processing wall thickness as the stainless-steel seamless pipe of 1.5-1.8mm:
(1) mold is manufactured, 6 keyways are evenly equipped on core mould lug bosses at end part, spinning roller working radius is 8mm.
(2) processing stainless steel cylindrical blank, blank tail portion are machined with the convex step of 2-4mm, are machined with 6 on convex step
A through slot, 6 through slots are corresponding with 6 keyway positions on mold.It selects stainless steel tubular sotck thinkness for 6mm, controls
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 passes through the fixed key block of screw and core model.By tail
Hold out against core model.
(4) main axis is controlled by spinning machine, and controls spinning roller extrusion billet.
Since stainless steel maximum deformation quantity is not more than 80%, the total deformation of blank is set in 70% by the present embodiment, root
It is two passage stepped spinnings by deformation design, then deflection per pass is not more than 50% according to constancy of volume and material rebounds.
It is analyzed and is tested according to material property, the springback capacity l of stainless steel material deformation is 0.2-0.4mm, thus according to material
Final wall thickness 1.5-1.8mm is expected to design adjacent passage spinning gap width as 2.3-2.65mm.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (5)
1. a kind of flanged (FLGD) stainless steel seamless pipe spin forming method in end, it is characterised in that include the following steps:
(1) mold is manufactured, the mold includes core model, spinning roller and tail top, and the design of core model end has a boss, is evenly distributed on boss
There is N number of keyway, N is the even number greater than 4, and core model is sleeved on the main shaft of spinning machine, and tail top is mounted on the tailstock of spinning machine
On；Four spinning rollers are installed, four spinning rollers are uniformly distributed, and two opposite spinning rollers are located in the same plane, phase on spinning machine
Two adjacent spinning rollers are respectively in axial direction with radial mistake away from distribution；
(2) processing stainless steel cylindrical blank, and convex step is processed in blank tail portion, N number of pass through is machined on the convex step
Stainless steel cylindrical blank is sleeved on core model by through slot, after being set in place, the boss phase of the convex step and core model end
Match, and N number of through slot is corresponding with N number of keyway position on mold；
(3) key block, and fixed key block and core model are placed in each through slot and its corresponding keyway, and tail top is held out against into core model；
(4) main axis is controlled by spinning machine, and controls spinning roller extrusion billet, it is ensured that the drafts at stainless steel straight tube both ends
It is less than the drafts of rest part, realizes seamless mould pressing of the end with flange stainless steel straight tube.
2. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of end 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 end according to claim 2, it is characterised in that:
The spinning roller working radius is 6-10mm.
4. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of end according to claim 1, it is characterised in that:
In the step (2) when processing stainless steel cylindrical blank, the inner diameter deviation of control stainless steel cylindrical blank is 0.03-0.08mm.
5. the flanged (FLGD) stainless steel seamless pipe spin forming method in a kind of end according to claim 1, it is characterised in that:
Adjacent passage spinning gap width isWherein L is theoretical drafts,For the springback capacity of material deformation.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| CN106903205A CN106903205A (en) | 2017-06-30 |
| CN106903205B true CN106903205B (en) | 2018-12-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN111408650B (en) * | 2020-03-24 | 2021-05-14 | 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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| 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 |
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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