CN107913931A - The bloom stable control method of large thin-wall part mould pressing - Google Patents
The bloom stable control method of large thin-wall part mould pressing Download PDFInfo
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- CN107913931A CN107913931A CN201610882967.6A CN201610882967A CN107913931A CN 107913931 A CN107913931 A CN 107913931A CN 201610882967 A CN201610882967 A CN 201610882967A CN 107913931 A CN107913931 A CN 107913931A
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- Prior art keywords
- blank
- core
- spinning
- mould pressing
- control method
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Classifications
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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
Abstract
The invention belongs to Technology of Plastic Processing field, specifically disclose a kind of bloom stable control method of large thin-wall part mould pressing, the circular blank of aimed dia is prepared first, then core is installed on spinning machine, part is installed on mandrel surface, and the bottom of core processes two groups of grooves, form grid, circular arc spinning roller is installed afterwards, tail top, last mould pressing are installed outside blank.Intersection grid is processed in core bottom, unstability resistance can be significantly increased, blank is reduced or eliminated in spinning process relative to the rotation of core, increases the stability of blank.Standstill locking pin hole is processed in core bottom and blank relevant position, it is inserted into pin, prevent rotation of the blank relative to core in spinning process, it is effectively increased the stability of blank, in spinning process, feed rate is controlled, effectively controls spinning force, to overall collapse and local buckling, there is beneficial effect.
Description
Technical field
The invention belongs to Technology of Plastic Processing field, and in particular to a kind of base being directed in thin-walled parts spinning forming process
Expect stability control method.
Background technology
In the structure manufacturing technology of carrier rocket or guided missile, using mould pressing manufacture large-scale tank (diameter 2.5~
3.5m, wall thickness are 2mm~5mm) spherical, elliposoidal, the bottom housing like the envelope head profile such as taper, be arrow (bullet) structure storage
One of case manufacturing technology developing direction.Using the technology, can change the current tank housing manufacture in China reliability margin deficiency,
Inefficient present situation of high cost：Using melon valve, head cover or other structures welding.Because fusion length is very long, complicated, to quality
Control and Reliability Assurance are brought greater impact.Obviously, using integral fabrication technique, by part as much as possible or component system
Make and be more prone to for weldless one-piece parts, quality control, performance reliability will also be significantly improved, integral fabrication technique
It is the development trend of space flight important feature part manufacture.
Using circular tablet as blank, spherical, elliposoidal, the bottom shell like pyramidal structure are made using spin forming technique rotation
, easily there is the unstable phenomenon of blank in spinning process, this will significantly affect mould pressing precision in body.In spinning process,
Bloom stable has significant impact to product shaping type face precision.If blank is unstable, spinning feed ratio will appear from significantly
Fluctuate, the deflection of regional cannot be mutually coordinated in spinning process, and formed product precision and surface quality will be caused notable
Decline.Diameter is bigger, and wall thickness is thinner, and the stability problem of spinning blank just highlights, thus it is guaranteed that and reinforcement conical bottom rotation
The stability of pressed compact material is even more important.The stability of spinning blank is improved, is primarily to solve the problems, such as.
The content of the invention
The object of the present invention is to provide a kind of bloom stable control method of large thin-wall part mould pressing, increase are whole
The resistance of body unstability, effectively controls the overall collapse of spinning blank.
Technical scheme is as follows：
A kind of bloom stable control method of large thin-wall part mould pressing, this method comprises the following steps：
1) spinning blank prepares
The circular blank of aimed dia is prepared, blank wall thickness is 0~0.6% with bore dia ratio；
2) core is installed
Core is installed on spinning machine, part is installed on mandrel surface so that core is on the contact surface with part
Extension, blank and core are fixed；
The bottom of core processes two groups of grooves, forms grid；
3) circular arc spinning roller is installed
Circular arc spinning roller is installed outside part, the radius of corner of circular arc spinning roller is 0.8~3.0 times of sotck thinkness.Circular arc
The axis of spinning roller is with core axis angle in the range of 20~60 °；
4) tail top is installed
Tail top is installed outside blank, which is ledge structure, and step big end thinnest part thickness is 3~5mm；
5) mould pressing
Lubricant is smeared into blank outer surface, starts spinning machine rotary press modelling.
In the bloom stable control method of above-mentioned large thin-wall part mould pressing, blank in the step 1)
Several holes are machined with, are fixed blank using positioning pin and rotation stop pin with core in step 2), positioning pin and rotation stop pins position are in institute
In the hole stated.
In the bloom stable control method of above-mentioned large thin-wall part mould pressing,
When sotck thinkness is not more than 8mm, a diameter of 8mm~10mm of pin of positioning pin and rotation stop pin；
When sotck thinkness is more than 8mm, 1.0~1.3 times of a diameter of sotck thinkness of pin of positioning pin and rotation stop pin；Pin
The distance of hole peritreme to core outer is 5~15mm.
In the bloom stable control method of above-mentioned large thin-wall part mould pressing, the core in the step 2)
Mould bottom mesh parameter is：Two groups of groove angles are 60 °~80 °, and groove number is 3~5 in every group of groove, gash depth
0.5~1mm, 4~10mm of width, 4~10mm of trench spacing.
In the bloom stable control method of above-mentioned large thin-wall part mould pressing, the profit in the step 5)
Lubrication prescription is MoS2+ butter.
In the bloom stable control method of above-mentioned large thin-wall part mould pressing, in the step 5)：
When the semi-cone angle of part is more than 30 °, shaped using shear spinning, the feed ratio of circular arc spinning roller is 0.8~2.0mm/
rev。
When the semi-cone angle of part is less than 30 °, shaped using conventional spinning, feed rate is 2~10mm/rev.
The remarkable result of the present invention is as follows：
Intersection grid is processed in core bottom, unstability resistance can be significantly increased, blank is reduced or eliminated in spinning process
In relative to core rotation, increase the stability of blank.
Standstill locking pin hole is processed in core bottom and blank relevant position, pin is inserted into, prevents blank in spinning process
In relative to core rotation, be effectively increased the stability of blank.
During rotary extrusion of thin-wall part, spinning blank passes through certain preform, adds the structural rigidity of blank, can be effective
Blank is controlled to produce the unstability of the forms such as the anti-back of the body, corrugation.
In spinning process, feed rate is controlled, spinning force is effectively controlled, to overall collapse and local buckling, has
Benefit influences.
Brief description of the drawings
Fig. 1 is the relation schematic diagram of blank, part and frock；
Fig. 2 is core bottom network；
Fig. 3 is typical preform spinning blank structure.
In figure：1. circular arc spinning roller；(2. nothing has preformed) spinning blank；3. part；4. part surplus；5. core；
6. standstill locking pin；7. shop bolt；8. tail top；201. spinning blanks；202. preform spinning blanks；203. formation of parts.
Embodiment
Below by the drawings and the specific embodiments, the invention will be further described.
As shown in Figure 1, Figure 2 and Figure 3, the specific steps of the bloom stable control method of large thin-wall part mould pressing
It is as follows.
1) spinning blank prepares
Circular blank is prepared, the hole to match with positioning pin, rotation stop pin is made on blank.It is straight when 2 wall thickness of blank and hole
The ratio between footpath is 0~0.6%, and spinning blank can strengthen blank rigidity through preform.
2) core is installed
Core 5 is installed on spinning machine (being known technology not shown in figure) as shown in Figure 1, the thickness of core 5 with
The ratio between 3 thickness of part is 0~2.5%.
Core 5 extends to form surplus naturally on the basis of part 3, and the end diameter of part 3 is Db, extends to bottom naturally
At planar diameter Dm, part surplus 4 is formed, is Δ L over long distances between 3 small end of part and base plane outer end.Core 5 and bottom
Knuckle R is processed between plane.Δ L is 1~3 times of sotck thinkness, after R is 0.5~2.5 times of material.
The bottom processing standstill locking pin hole of core 5 and groove.Standstill locking pin 6 is installed in hole, and circumferentially local, number
Amount 2~6.
When sotck thinkness is not more than 8mm, a diameter of 8mm~10mm of pin.
When sotck thinkness is more than 8mm, 1.0~1.3 times of a diameter of sheet thickness of pin；Pin hole peritreme is to core outer
Distance be 5~15mm.
As shown in Fig. 2, processing two groups of grooves in the base plane of core, grid is formed.Network parameter is as follows：Two
Group groove angle is 60 °~80 °, and groove number is 3~5,0.5~1mm of gash depth, 4~10mm of width in every group of groove,
4~10mm of trench spacing.
3) spinning roller is installed
For end socket or the part like wimble structure, installed using circular arc spinning roller 1, the radius of corner of circular arc spinning roller 1 is
0.8~3.0 times of sotck thinkness.The axis of circular arc spinning roller 1 is with 5 axis angle of core in the range of 20~60 °.
4) tail top is held out against
In order to which blank is held out against, tail top 8 is installed, which is ledge structure, and spinning roller space is reserved at step,
Step big end thinnest part thickness is 3~5mm.
5) mould pressing
Lubricant, such as MoS are smeared into 2 outer surface of blank2+ butter.
The semi-cone angle (tangent line and axis angle) of part 3 be more than 30 ° when, shaped using shear spinning, circular arc spinning roller 1 into
To than for 0.8~2.0mm/rev.
When the semi-cone angle (tangent line and axis angle) of part 3 is less than 30 °, shaped using conventional spinning, feed rate 2
~10mm/rev.
As shown in figure 3, give spinning blank 201, preform spinning blank 202 shows to 203 angle change of formation of parts
It is intended to.
Claims (6)
1. a kind of bloom stable control method of large thin-wall part mould pressing, it is characterised in that this method includes as follows
Step：
1) spinning blank prepares
The circular blank of aimed dia is prepared, blank wall thickness is 0~0.6% with bore dia ratio；
2) core is installed
Core (5) is installed on spinning machine, part (3) is installed on core (5) surface so that core (5) with part (3)
Contact surface on extend, blank and core (5) is fixed；
The bottom of core (5) processes two groups of grooves, forms grid；
3) circular arc spinning roller is installed
Circular arc spinning roller is installed outside part, the radius of corner of circular arc spinning roller 1 is 0.8~3.0 times of sotck thinkness.Circular arc spinning roller
1 axis is with core (5) axis angle in the range of 20~60 °；
4) tail top is installed
Tail top (8) are installed outside blank, which is ledge structure, and step big end thinnest part thickness is 3~5mm；
5) mould pressing
Lubricant is smeared into blank (2) outer surface, starts spinning machine rotary press modelling.
2. the bloom stable control method of large thin-wall part mould pressing as claimed in claim 1, it is characterised in that：Institute
Blank is machined with several holes in the step 1) stated, and fixes blank using positioning pin and rotation stop pin with core in step 2), positioning
Pin and rotation stop pins position are in the hole.
3. the bloom stable control method of large thin-wall part mould pressing as claimed in claim 2, it is characterised in that：
When sotck thinkness is not more than 8mm, a diameter of 8mm~10mm of pin of positioning pin and rotation stop pin；
When sotck thinkness is more than 8mm, 1.0~1.3 times of a diameter of sotck thinkness of pin of positioning pin and rotation stop pin；Pin hole hole
The distance of edge to core outer is 5~15mm.
4. the bloom stable control method of large thin-wall part mould pressing as claimed in claim 1, it is characterised in that institute
Core bottom mesh parameter in the step 2) stated is：Two groups of groove angles are 60 °~80 °, and groove number is 3 in every group of groove
~5,0.5~1mm of gash depth, 4~10mm of width, 4~10mm of trench spacing.
5. the bloom stable control method of large thin-wall part mould pressing as claimed in claim 1, it is characterised in that institute
Lubricant in the step 5) stated is MoS2+ butter.
6. the bloom stable control method of large thin-wall part mould pressing as claimed in claim 1, it is characterised in that
In the step 5)：
When the semi-cone angle of part (3) is more than 30 °, shaped using shear spinning, the feed ratio of circular arc spinning roller 1 is 0.8~2.0mm/
rev。
When the semi-cone angle of part (3) is less than 30 °, shaped using conventional spinning, feed rate is 2~10mm/rev.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610882967.6A CN107913931A (en) | 2016-10-10 | 2016-10-10 | The bloom stable control method of large thin-wall part mould pressing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610882967.6A CN107913931A (en) | 2016-10-10 | 2016-10-10 | The bloom stable control method of large thin-wall part mould pressing |
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|---|---|
| CN107913931A true CN107913931A (en) | 2018-04-17 |
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ID=61891811
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| CN201610882967.6A Pending CN107913931A (en) | 2016-10-10 | 2016-10-10 | The bloom stable control method of large thin-wall part mould pressing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482700A (en) * | 2018-11-19 | 2019-03-19 | 湖北三江航天红阳机电有限公司 | A kind of titanium alloy hemisphere rotary press modelling method and forming frock |
| CN110918748A (en) * | 2019-09-30 | 2020-03-27 | 西北工业大学 | Design method of ordinary spinning wheel path based on wrinkling defect consideration |
| CN111112453A (en) * | 2019-12-13 | 2020-05-08 | 首都航天机械有限公司 | Integral forming method for bottom head of large-scale storage tank with high depth-diameter ratio |
| CN111687592A (en) * | 2020-05-22 | 2020-09-22 | 上海航天精密机械研究所 | Integrated forming method for storage tank barrel section and integrated storage tank barrel section |
| CN112404228A (en) * | 2020-11-26 | 2021-02-26 | 首都航天机械有限公司 | Integral spinning forming process equipment for bottom of storage tank |
| CN114769454A (en) * | 2022-04-20 | 2022-07-22 | 华南理工大学 | Flexible gear and strengthening and toughening cold machining method thereof |
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| CN104525671A (en) * | 2014-12-16 | 2015-04-22 | 上海交通大学 | Forming device and method for end socket with baffle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482700A (en) * | 2018-11-19 | 2019-03-19 | 湖北三江航天红阳机电有限公司 | A kind of titanium alloy hemisphere rotary press modelling method and forming frock |
| CN109482700B (en) * | 2018-11-19 | 2020-09-22 | 湖北三江航天红阳机电有限公司 | Titanium alloy hemisphere spinning forming method and forming tool |
| CN110918748A (en) * | 2019-09-30 | 2020-03-27 | 西北工业大学 | Design method of ordinary spinning wheel path based on wrinkling defect consideration |
| CN111112453A (en) * | 2019-12-13 | 2020-05-08 | 首都航天机械有限公司 | Integral forming method for bottom head of large-scale storage tank with high depth-diameter ratio |
| CN111687592A (en) * | 2020-05-22 | 2020-09-22 | 上海航天精密机械研究所 | Integrated forming method for storage tank barrel section and integrated storage tank barrel section |
| CN112404228A (en) * | 2020-11-26 | 2021-02-26 | 首都航天机械有限公司 | Integral spinning forming process equipment for bottom of storage tank |
| CN114769454A (en) * | 2022-04-20 | 2022-07-22 | 华南理工大学 | Flexible gear and strengthening and toughening cold machining method thereof |
| CN114769454B (en) * | 2022-04-20 | 2023-05-12 | 华南理工大学 | Flexible gear and strengthening and toughening cold processing method thereof |
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Application publication date: 20180417 |
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