CN102642010A - Cast bulge forming of spherical container - Google Patents
Cast bulge forming of spherical container Download PDFInfo
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- CN102642010A CN102642010A CN2012101482110A CN201210148211A CN102642010A CN 102642010 A CN102642010 A CN 102642010A CN 2012101482110 A CN2012101482110 A CN 2012101482110A CN 201210148211 A CN201210148211 A CN 201210148211A CN 102642010 A CN102642010 A CN 102642010A
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Abstract
The invention relates to a method for producing a spherical container, which is mainly based on the vacuum casting and pressurization solidification of blanks, and utilizes the technology that through utilizing metal thermoplasticity, pressurized gas is filled into a spherical shell casting blank cavity which is solidified after the casting and has the temperature higher than the recrystallization temperature, so that the spherical shell casting blank cavity is internally pressurized for bulge forming. The method belongs to the technical field of pressure container production.
Description
Affiliated technical field
The present invention relates to the manufacturing approach of spherical container; Mainly be on the basis of vacuum casting, compression solidification at blank; The thermoplasticity of utilizing metal after casting, solidified and be in feed in the spherical shell strand chamber more than the recrystallization temperature pressed gas make its reach in the technology of pressure bulging, the invention belongs to pressure vessel manufacturing technology field.
Background technology
Spherical container is widely used in industries such as oil, chemical industry, combustion gas, water supply, papermaking owing to it has high bearing capacity, deadweight is little and floor space is little.The manufacturing approach of spherical container is varied, as: welding, explosive forming method, no mould hydraulic expanding type method etc., but all have certain defective and deficiency.Like explosion method, its security is wayward, causes security incident easily; No mould hydraulic expanding type method is in polyhedron, to feed the highly pressurised liquid bulging, because the complexity of formation system, also has a series of roller system, group to operations such as, welding pressurization, detection, flaw detections, is difficult to promote.Current; The method of main flow is earlier spherical container to be divided into many limbs, and common distinguish mode is the mixed board-like of tangerine lobe formula and sufficient lobe formula or the length that collects both, again according to the size of ball clack with plate cutting, punching press; Making every sheet forming is the shape of ball clack, organizes, welding fabrication again.But; This method stock utilization is low, need large-scale pressing equipment, like the hydraulic press of big work top; Large-tonnage diel etc.; The assembly welding workload is big and complicated, operation is many, long in time limit, the weld seam accuracy of form and position is poor, welding quality is difficult for guaranteeing, efficient is low, causes the spherical tank manufacturing cost high.
Summary of the invention
The stock utilization that exists in the traditional spheroidal manufacturing method for container is low in order to solve, the large-scale pressing equipment of needs, like the hydraulic press of big work top; Large-tonnage diel etc.; The assembly welding workload is big and complicated, operation is many, long in time limit, the weld seam accuracy of form and position is poor, welding quality is difficult for guaranteeing, efficient is low; Cause problems such as spherical tank manufacturing cost height; The present invention utilizes casting to obtain high-quality spherical shell strand earlier, adopts thermoplasticity swelling pressure manufacturing process further to optimize the material crystalline structure then, improves the performance of spherical shell.
Its main technical schemes is: alloy is prepared and fusing according to the designing requirement ratio; The metal bath that is heated to pouring temperature is cast in by the metal pattern with vertical-parting face, and in the spherical shell casting mold of the spherical core formation of gas permeability, in casting process; Close pressure valve, atmospheric valve with pressure gas source UNICOM; Open vavuum pump and coupled vacuum valve, the gas in the casting mold is extracted out, make casting mold die cavity inside be in negative pressure state through the main tracheae of core set inside.After casting is accomplished; When the solidification of metal melt that contacts with metal pattern, and temperature is closed vavuum pump and the coupled vacuum valve that connects when being lower than crystallization temperature 10～160 and spending; Open the pressure valve that is connected with pressure gas source; Main tracheae through being arranged in the core charges into pressure air or the inert gas of 0.1～30MPa to spherical shell strand inner chamber, and the spherical shell strand continues to solidify under the effect of pressed gas, until solidifying fully.
When the temperature of spherical shell strand gets into the pyroplastic deformation scope, close the pressure valve with pressure gas source UNICOM, open atmospheric valve; Close atmospheric valve after the pressure of spherical shell strand inner chamber is reduced to 0.1～0.6MPa, remove metal pattern, open the pressure valve that is connected with pressure gas source once more; Give in the spherical shell strand charged pressure air or inert gas gradually; Spherical shell strand diameter under the bulging effect of pressed gas increases, and wall thickness reduces, until reaching predetermined shape and size.
Spherical shell strand appearance and size is less than 1/2nd of spherical container diameter, and wall thickness is more than three times of spherical container, and according to the entity volume of spherical container wall thickness, confirms the casting volume of spherical shell strand according to volume equal principle before and after the bulging.
Realize that device that the spherical container casting is expanded into shape is that the spherical core of set inside master tracheae and gas permeability is fixed in the spherical die cavity that metal pattern with vertical-parting face constitutes less than the pillar of a plurality of equal length of spherical container wall thickness by diameter; This pillar material therefor is identical with globular pressure-container material therefor chemical composition, in casting cycle, fuses into one with liquid metals; The inner main tracheae of core upwards is connected with a joint of four-way pipe fitting after rising head passes metal pattern, and all the other joints of four-way pipe fitting are connected with pressure valve and pressure gas source, vacuum valve and vavuum pump, atmospheric valve respectively; Ingate adjacency at metal pattern is provided with cooling water channel, behind casting complete, feeds cooling water, and the metal of ingate is solidified at first, to prevent that under gas pressure the inner not solidified metal of spherical shell strand is regurgitated away from cast gate in the process of setting, causes the accident.
Temperature sensor is set on metal pattern, is used for detecting spherical shell strand casting processing process temperature conditions.
This beneficial effect of the invention is: the spherical container simplified manufacturing process, and quality improves, and is expected to realize mechanization production, and material consumption descends, and reduces labour intensity significantly, and enhances productivity.
Description of drawings
Fig. 1 is a spherical shell strand casting sketch map
Fig. 2 is a spherical container bulging sketch map
1. ingate, 2. cooling water channel, 3. spherical shell strand, 4. pillar, 5. metal pattern, 6. core, 7. pressure gas source, 8. pressure valve, 9. vacuum valve, 10. vavuum pump, 11. atmospheric valves, 12. four-ways, 13. main tracheaes, 14. rising heads, 15. temperature sensors, 301. spherical containers
The specific embodiment
Alloy is prepared and fusing according to the designing requirement ratio; The metal bath that is heated to pouring temperature is cast in by the metal pattern with vertical-parting face 5, and in the spherical shell casting mold of spherical core 6 formations of gas permeability, in casting process; Close pressure valve 8, atmospheric valve 11 with pressure gas source 7 UNICOMs; Open vavuum pump 10 and coupled vacuum valve 9, the gas in the casting mold is extracted out, make casting mold die cavity inside be in negative pressure state through the main tracheae 13 of core 6 set inside.After casting is accomplished; When the solidification of metal melt that contacts with metal pattern 5, and temperature is closed vavuum pump 10 and the coupled vacuum valve that connects 9 when being lower than crystallization temperature 10～160 and spending; Open and pressure gas source 7 pressure valve 8 that connect mutually; Main tracheae 13 through being arranged in the core 6 charges into pressure air or the inert gas of 0.1～30MPa to the inner chamber of spherical shell strand 3, and spherical shell strand 3 continues to solidify under the effect of pressed gas, until solidifying fully.
When the temperature of spherical shell strand 3 gets into the pyroplastic deformation scope, close the pressure valve 8 with pressure gas source 7 UNICOMs, open atmospheric valve 11; Close atmospheric valve 11 after the pressure of spherical shell strand 3 inner chambers is reduced to 0.1～0.6MPa, remove metal pattern 5, open the pressure valve 8 that is connected with pressure gas source 7 once more; Give in the spherical shell strand 3 charged pressure air or inert gas gradually; Spherical shell strand 3 diameter under the bulging effect of pressed gas increases, and wall thickness reduces, until reaching predetermined shape and size.
The appearance and size of spherical shell strand 3 is less than 1/2nd of spherical container 301 diameters, and wall thickness is more than three times of spherical container 301, and according to the entity volume of spherical container 301 wall thickness, confirms the casting volume of spherical shell strand according to volume equal principle before and after the bulging.
Realize that device that spherical container 301 castings are expanded into shape is that the spherical core 6 of set inside master tracheae 13 and gas permeability is fixed in the spherical die cavity that metal pattern 5 with vertical-parting face constitutes less than the pillar 4 of a plurality of equal length of spherical container 301 wall thickness by diameter; These pillar 4 material therefors are identical with spherical container 301 material therefor chemical compositions, in casting cycle, fuse into one with liquid metals; The inner main tracheaes 13 of core 6 upwards pass metal pattern 5 backs from rising head 14 and are connected with a joint of pipe fitting four-way 12, and all the other joints of pipe fitting four-way 12 are connected with pressure valve 8 and pressure gas source 7, vacuum valve 9 and vavuum pump 10, atmospheric valve 11 respectively; Ingate 1 adjacency at metal pattern 5 is provided with cooling water channel 2; Behind casting complete, feed cooling water, the metal at ingate 1 place is solidified at first; To prevent that under gas pressure spherical shell strand 3 inner not solidified metals are regurgitated away from cast gate in the process of setting, cause the accident.
On metal pattern 5, temperature sensor is set, is used for detecting spherical shell strand 3 casting processing process temperature conditions.
Claims (6)
1. spherical container is cast the method that is expanded into shape; The metal bath that is heated to pouring temperature is cast in by the metal pattern with vertical-parting face; And in the spherical shell casting mold of the spherical core formation of gas permeability, its characteristic makes and is: in the casting process, through the main tracheae of core set inside the gas in the casting mold is extracted out; Make casting mold die cavity inside be in negative pressure state; After casting is accomplished, charge into pressure air or the inert gas of 0.1～30MPa to spherical shell strand inner chamber, the spherical shell strand continues to solidify under the effect of pressed gas; When the temperature of spherical shell strand gets into the pyroplastic deformation scope, close the pressure valve with pressure gas source UNICOM, open atmospheric valve; Close atmospheric valve after the pressure of spherical shell strand inner chamber is reduced to 0.1～0.6MPa, remove metal pattern, open the pressure valve that is connected with pressure gas source once more; Give in the spherical shell strand charged pressure air or inert gas gradually; Spherical shell strand diameter under the bulging effect of pressed gas increases, and wall thickness reduces, until reaching predetermined shape and size.
2. the method that said spherical container casting is expanded into shape according to claim 1; It is characterized in that: spherical shell strand appearance and size is less than 1/2nd of spherical container diameter; Wall thickness is more than three times of spherical container; And, confirm the casting volume of spherical shell strand according to volume equal principle before and after the bulging according to the entity volume of spherical container wall thickness.
3. the method that said spherical container casting is expanded into shape according to claim 1; It is characterized in that: when the solidification of metal melt that contacts with metal pattern; And temperature is lower than crystallization temperature 10～160 when spending; Close vavuum pump and the coupled vacuum valve that connects, open the pressure valve that is connected with pressure gas source, charge into pressure air or the inert gas of 0.1～30MPa to spherical shell strand inner chamber through being arranged at main tracheae in the core.
4. the device that said spherical container casting is expanded into shape according to claim 1; It is characterized in that: the spherical core of set inside master tracheae and gas permeability is fixed in the spherical die cavity that metal pattern with vertical-parting face constitutes less than the pillar of a plurality of equal length of spherical container wall thickness by diameter; This pillar material therefor is identical with globular pressure-container material therefor chemical composition, in casting cycle, fuses into one with liquid metals.
5. the device that said spherical container casting is expanded into shape according to claim 4; It is characterized in that: the inner main tracheae of core upwards is connected with a joint of four-way pipe fitting after rising head passes metal pattern, and all the other joints of four-way pipe fitting are connected with pressure valve and pressure gas source, vacuum valve and vavuum pump, atmospheric valve respectively.
6. the device that said spherical container casting is expanded into shape according to claim 4; It is characterized in that: the ingate adjacency at metal pattern is provided with cooling water channel; Behind casting complete, feed cooling water, the metal of ingate is solidified at first; To prevent that under gas pressure the inner not solidified metal of spherical shell strand is regurgitated away from cast gate in the process of setting, cause the accident.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101482110A CN102642010A (en) | 2012-05-14 | 2012-05-14 | Cast bulge forming of spherical container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101482110A CN102642010A (en) | 2012-05-14 | 2012-05-14 | Cast bulge forming of spherical container |
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| CN102642010A true CN102642010A (en) | 2012-08-22 |
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| CN2012101482110A Pending CN102642010A (en) | 2012-05-14 | 2012-05-14 | Cast bulge forming of spherical container |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU899238A1 (en) * | 1979-12-14 | 1982-01-23 | Производственное Объединение "Ново-Краматорский Машиностроительный Завод" | Hollow ingot production method |
| US4774826A (en) * | 1985-12-10 | 1988-10-04 | Mbb Gmbh | Method of making a container from a material exhibiting superplasticity |
| CN1052442A (en) * | 1990-12-17 | 1991-06-26 | 张世森 | The manufacture method of sealed hollow metal sphere |
| CN1767916A (en) * | 2003-03-25 | 2006-05-03 | 克劳迪亚斯·彼得斯技术有限责任公司 | Method for producing hollow grinding bodies and grinding bodies so produced |
| CN1792492A (en) * | 2005-12-30 | 2006-06-28 | 陕西科技大学 | Thermoplastic forming tech. for large-size spherical tank |
| CN101134234A (en) * | 2007-07-23 | 2008-03-05 | 陕西科技大学 | Internal pressure expansion type casting technique |
-
2012
- 2012-05-14 CN CN2012101482110A patent/CN102642010A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU899238A1 (en) * | 1979-12-14 | 1982-01-23 | Производственное Объединение "Ново-Краматорский Машиностроительный Завод" | Hollow ingot production method |
| US4774826A (en) * | 1985-12-10 | 1988-10-04 | Mbb Gmbh | Method of making a container from a material exhibiting superplasticity |
| CN1052442A (en) * | 1990-12-17 | 1991-06-26 | 张世森 | The manufacture method of sealed hollow metal sphere |
| CN1767916A (en) * | 2003-03-25 | 2006-05-03 | 克劳迪亚斯·彼得斯技术有限责任公司 | Method for producing hollow grinding bodies and grinding bodies so produced |
| CN1792492A (en) * | 2005-12-30 | 2006-06-28 | 陕西科技大学 | Thermoplastic forming tech. for large-size spherical tank |
| CN101134234A (en) * | 2007-07-23 | 2008-03-05 | 陕西科技大学 | Internal pressure expansion type casting technique |
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Application publication date: 20120822 |