CN106984685A - Large thin-wall spherical seal head without mould substep spin forming method - Google Patents
Large thin-wall spherical seal head without mould substep spin forming method Download PDFInfo
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- CN106984685A CN106984685A CN201710394315.2A CN201710394315A CN106984685A CN 106984685 A CN106984685 A CN 106984685A CN 201710394315 A CN201710394315 A CN 201710394315A CN 106984685 A CN106984685 A CN 106984685A
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- tapered cup
- slab
- seal head
- wall thickness
- spinning
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to a kind of large thin-wall spherical seal head spin forming method.This method is divided into the completion of two steps, and slab circumferential flange is fixed on tubular bearing by the first step, and double rotary wheel is fed from the left and right sides along taper bus, and the extrusion process of plane slab is turned into Tapered Cup.Second step, on the basis of the first step, two spinning rollers finally give large spherical surface end socket part along ball-type bus feeding extruding Tapered Cup through multiple tracks rotary pressing processing.This method can realize large spherical surface end socket part monolithic molding in engineering, eliminate the original unstable defect of weld seam using in melon valve welding forming, improve Seal Head Strength.Two steps processing simultaneously is carried out all on a tubular bearing, saves die sinking cost, and make processing process easier.
Description
Technical field
The present invention relates to spinning forming process method, particularly large thin-wall spherical seal head without mould substep mould pressing
Process.
Background technology
Fuel tank is the primary structural members of carrier rocket, is the primary load bearing structure of rocket, large thin-wall tank
Integration, high accuracy manufacture is that rocket carrying capacity obtains the key technique that further breaks through.
With continuing to develop for China space industry, rocket is more and more wider to the demand of large-sized end enclosure part, large thin-wall envelope
Head is as the key building block of ultra-large type carrier rocket fuel tank, and to the capacity of fuel tank, intensity serves key
Effect, and the Forming Workpiece of traditional melon valve welding plays pendulum all the time in commissure mechanical property, traditional spinning
Processing method easily produces local reduction or even processes the defects such as rupture.So to the overall precision form skill of large thin-wall end socket part
The further investigation of art, the development to China's aerospace industry is significant.
Existing large spherical surface seal head forming method：
1. point valve stretch bending welding shaping
Point valve welding shapes thought using " breaking the whole up into parts ", and an end socket is divided into 6 to 8 pieces of point valves, one by one punching press or it is pull-shaped must
To each point of valve, a point valve is then welded into by an end socket by group weldering.
The shortcoming of the technique：Welding position structural strength is low, poor reliability；Residual stress is big, and deformation is big, and precision is low；Need
Want larger thickness, it is impossible to realize that lightweight is manufactured.
2. end socket punching rotation shaping.
Slab is circumferentially fixed on tubular core along flange, spinning roller is fed by end socket bus, extrudes workpiece, gradually form
The manufacturing process of required workpiece
The shortcoming of the technique：This method belongs to is machined directly to spherical workpiece by plane slab, and its every time deflection is excessive,
Easily it is deformed uneven, unstable phenomenon.
3. branch's accurate forming method.
The first step：Tapered Cup is worked the work piece into by traditional shear spinning technique.
Second step：By multiple constraint spinning process, Tapered Cup flange and center are fixed on sphere core, pass through spinning roller
With sphere core collective effect mould pressing.
The shortcoming of the technique：The shaping of two steps needs to manufacture core, the processing cost of raising twice.And add processing work
The complexity of skill is higher to the required precision installed twice.
The content of the invention
For the deficiency of above-mentioned manufacturing process, more than on the basis of original patent of the first and second two methods, enter one
Step is proposed without mould substep spin forming method.
This is specific as follows without mould substep spin forming method：
The first step：Plane slab is circumferentially fixed in tubular bearing, and double rotary wheel is crowded from left and right to being fed centrally along Tapered Cup bus
Pressing plate base, realizes slab to the deformation of Tapered Cup.
The first step is processed as shown in figure 1, the flange position of slab 13 is fixed on into tubular by blank holder 12 and bolt 16
On bearing 11, in process, slab does synchronous rotary motion with tubular bearing and machine tool chief axis, and spinning roller 14 is female along Tapered Cup
Slab is processed as Tapered Cup 15 by line from left and right to being centrally fed.Both big displacement deformation had been realized, had been reduced again by plane slab
The material deformation non-uniform phenomenon that extruding is caused directly is fed along spherical bus, the evenness of wall thickness of drip molding is improved.
Second step processes the Tapered Cup 15 as shown in Fig. 2 obtained by first step processing, installs constant, spinning roller 14 is along ball-type
Bus point three passages feeding, ultimately forms large thin-wall spherical seal head 25.
Second step：Second step processing is divided into the progress of three passages, and spinning roller is respectively from center to the left and right along ball in one or two passages
Shape bus is fed（Such as track 1 and 2 in Fig. 4）, spinning roller is fed from left and right to centrally along spherical bus in the 3rd passage（Such as Fig. 4
Middle track 3）, it is final to obtain large thin-wall spherical seal head.Spinning roller is fed according to such track and direction, can make material stream
Dynamic uniform, it is to avoid the flange material stacking during the feeding of multi-pass spinning roller, part is thinned too big and workpiece centre and sunk, from
And processing unstability is reduced, improve the evenness of wall thickness of workpiece.
The present invention has following superiority：（1）Weld and process relative to melon valve, large spherical surface end socket can be realized in engineering
Part monolithic molding, eliminates the unstable defect of melon valve welding forming weld seam, improves the mechanical property of drip molding, and realizes light weight
Change manufacture.（2）Relative to the processing method that original end socket rushes rotation shaping, this method can realize precision form, and this method is formulated
The specific machining locus and spinning roller direction of feed per a time are gone out, have made material flowing uniform, reduce material stacking, part mistake
It is thinned, the generation of the unstable phenomenon such as workpiece centre sinking improves the evenness of wall thickness and machining accuracy of workpiece.（3）Relative to
Original substep accurate processing method, this process simplify processing technology, reduces multiple clamping and the processing of multiple moulds is brought
Error and improve production efficiency, it is only necessary to clamped one time is fixed, and just can realize high-precision manufacture.Processed using this method
When, it is not necessary to taper and spherical mould are manufactured, die sinking cost is saved.
Brief description of the drawings
Fig. 1 is that first step Tapered Cup rotary pressing processing shapes schematic diagram,
Fig. 2 is second step sphere seal head forming schematic diagram,
The shaping trajectory diagram and the direction of feed of spinning roller of Fig. 3 Tapered Cup spinning,
Each pass trace figure and each passage spinning roller direction of feed of Fig. 4 sphere seal head formings；
Fig. 5 Tapered Cup mould pressing wall thickness rules.
Embodiment
The present invention without mould substep rotary pressing processing process, realize that slab, to the deformation of Tapered Cup, is not then changed first
Mould, carries out three passage processing, and Tapered Cup processing is ultimately formed into large thin-wall spherical seal head.
Tapered Cup mould pressing meets Tapered Cup uniform wall thickness after sinusoidal rule, i.e. spinning, spinning constantly blank wall thickness with
The relation of product wall thickness：（T is the wall thickness of product after spinning, t0For the wall thickness of blank,For semi-cone angle).According to gold
Belong to material plasticity and deform isometric principle, the unit rectangular area of blankWith the parallelogram area after deformationIt is equal, semi-cone angleFor definite value, so Tapered Cup uniform wall thickness.
Claims (3)
1. large thin-wall spherical seal head without mould substep spin forming method, without core extruding, it is characterised in that：Specific bag
Include following steps：
Step one, by the flange position of slab by blank holder and being bolted on tubular bearing, in process, slab
Do synchronous rotary motion with tubular bearing and machine tool chief axis, spinning roller along Tapered Cup bus from left and right to being centrally fed, by slab plus
Work is Tapered Cup；
Step 2, the Tapered Cup obtained by first step processing installs constant, and spinning roller is fed along ball-type three passages of bus point, finally
Form large thin-wall spherical seal head；
The three passages feeding, spinning roller is fed along spherical bus to the left and right from center respectively in the feeding of one or two passages, the 3rd
Spinning roller is fed from left and right to centrally along spherical bus in passage feeding.
2. large-scale large thin-wall spherical seal head according to claim 1 without mould substep spin forming method, its feature
It is, need not all makes core to extrude in step one and step 2, reduces die sinking cost.
3. large-scale large thin-wall spherical seal head according to claim 1 without mould substep spin forming method, its feature
It is, the Tapered Cup mould pressing meets Tapered Cup uniform wall thickness after sinusoidal rule, i.e. spinning, slab wall thickness and rotation during spinning
The relation of Tapered Cup wall thickness after pressure：T=t0Sin θ, t is the wall thickness of Tapered Cup after spinning, t0For the wall thickness of slab, θ is semi-cone angle,
The isometric principle of Plastic Deformation of Metal Materials, the unit rectangular area a of slab0b0c0d0With the parallelogram face after deformation
Product abcd is equal, and it is uniform to draw Tapered Cup wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710394315.2A CN106984685A (en) | 2017-05-29 | 2017-05-29 | Large thin-wall spherical seal head without mould substep spin forming method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710394315.2A CN106984685A (en) | 2017-05-29 | 2017-05-29 | Large thin-wall spherical seal head without mould substep spin forming method |
Publications (1)
| Publication Number | Publication Date |
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| CN106984685A true CN106984685A (en) | 2017-07-28 |
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| CN201710394315.2A Pending CN106984685A (en) | 2017-05-29 | 2017-05-29 | Large thin-wall spherical seal head without mould substep spin forming method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262211A (en) * | 2018-11-01 | 2019-01-25 | 桂林电子科技大学 | A kind of storage sphere manufacturing method and its device |
| CN109746299A (en) * | 2019-02-15 | 2019-05-14 | 沈阳航空航天大学 | A kind of wall thickness such as the truncated cone thin-wall part based on spherical surface spinning roller are without mould spin-on process |
| CN109894506A (en) * | 2018-12-21 | 2019-06-18 | 内蒙古航天红岗机械有限公司 | One koji bus shape part internal rolling hollow mold process unit |
| CN112170606A (en) * | 2020-11-10 | 2021-01-05 | 中南大学 | Spinning method of thin-wall end socket with large depth-diameter ratio |
| CN112496134A (en) * | 2020-11-10 | 2021-03-16 | 中南大学 | Spinning method of curved surface thin-wall end socket with flanging hole |
| CN112672835A (en) * | 2018-07-06 | 2021-04-16 | 日产自动车株式会社 | Successive forming method |
| CN113333556A (en) * | 2021-06-02 | 2021-09-03 | 上海交通大学 | Spinning die and spinning method for spherical part with annular ribs at port |
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| WO2001049429A1 (en) * | 1998-04-27 | 2001-07-12 | Standex International Corporation | Manufacturing a dome from an undersized blank |
| CN201002119Y (en) * | 2006-11-29 | 2008-01-09 | 刘宪福 | Hydraulic type special-shaped sealing-head edge rotary cutting machine |
| CN201815581U (en) * | 2010-10-21 | 2011-05-04 | 胡景春 | One-step method non-reinforced vessel end cold spinning machine |
| CN104275378A (en) * | 2014-10-24 | 2015-01-14 | 中南大学 | Large diameter-thick ratio and vertical distance ratio seal head rotary percussion forming device and rotary percussion method thereof |
| WO2015172940A1 (en) * | 2014-04-03 | 2015-11-19 | Efs Euro Forming Service Gmbh | Method for shaping an end of a pipe, associated device for performing the method, rolling element, and a flange shaped therewith at an end of a pipe |
| CN106424287A (en) * | 2016-12-22 | 2017-02-22 | 中南大学 | Stepwise precise spin-forming process method for large thin-wall dome |
| CN106623611A (en) * | 2016-12-08 | 2017-05-10 | 重庆理工大学 | Combined forming method of deep double-cone and spherical-head type thin-wall part |
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| WO2001049429A1 (en) * | 1998-04-27 | 2001-07-12 | Standex International Corporation | Manufacturing a dome from an undersized blank |
| CN201002119Y (en) * | 2006-11-29 | 2008-01-09 | 刘宪福 | Hydraulic type special-shaped sealing-head edge rotary cutting machine |
| CN201815581U (en) * | 2010-10-21 | 2011-05-04 | 胡景春 | One-step method non-reinforced vessel end cold spinning machine |
| WO2015172940A1 (en) * | 2014-04-03 | 2015-11-19 | Efs Euro Forming Service Gmbh | Method for shaping an end of a pipe, associated device for performing the method, rolling element, and a flange shaped therewith at an end of a pipe |
| CN104275378A (en) * | 2014-10-24 | 2015-01-14 | 中南大学 | Large diameter-thick ratio and vertical distance ratio seal head rotary percussion forming device and rotary percussion method thereof |
| CN106623611A (en) * | 2016-12-08 | 2017-05-10 | 重庆理工大学 | Combined forming method of deep double-cone and spherical-head type thin-wall part |
| CN106424287A (en) * | 2016-12-22 | 2017-02-22 | 中南大学 | Stepwise precise spin-forming process method for large thin-wall dome |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112672835A (en) * | 2018-07-06 | 2021-04-16 | 日产自动车株式会社 | Successive forming method |
| CN109262211A (en) * | 2018-11-01 | 2019-01-25 | 桂林电子科技大学 | A kind of storage sphere manufacturing method and its device |
| CN109894506A (en) * | 2018-12-21 | 2019-06-18 | 内蒙古航天红岗机械有限公司 | One koji bus shape part internal rolling hollow mold process unit |
| CN109746299A (en) * | 2019-02-15 | 2019-05-14 | 沈阳航空航天大学 | A kind of wall thickness such as the truncated cone thin-wall part based on spherical surface spinning roller are without mould spin-on process |
| CN112170606A (en) * | 2020-11-10 | 2021-01-05 | 中南大学 | Spinning method of thin-wall end socket with large depth-diameter ratio |
| CN112496134A (en) * | 2020-11-10 | 2021-03-16 | 中南大学 | Spinning method of curved surface thin-wall end socket with flanging hole |
| CN113333556A (en) * | 2021-06-02 | 2021-09-03 | 上海交通大学 | Spinning die and spinning method for spherical part with annular ribs at port |
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Application publication date: 20170728 |
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