CN102615505A - Method and device for pneumatic bulging after head casting - Google Patents
Method and device for pneumatic bulging after head casting Download PDFInfo
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- CN102615505A CN102615505A CN2012101053223A CN201210105322A CN102615505A CN 102615505 A CN102615505 A CN 102615505A CN 2012101053223 A CN2012101053223 A CN 2012101053223A CN 201210105322 A CN201210105322 A CN 201210105322A CN 102615505 A CN102615505 A CN 102615505A
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- end socket
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Abstract
The invention relates to a method and a device for pneumatic bulging after head casting, in particular to a method and a device for refining crystal structure of a casting by pneumatic bulging to improve strength, which belong to the technical field of pressure container manufacturing. Alloys are prepared and melted according to a required proportion, metal melt heated to pouring temperature is poured into a mould composed of an upper casting mould, a base and a core, gas in the mould is exhausted through a man gas pipe disposed inside the core during pouring, and accordingly interior pressure of a cavity is smaller than atmospheric pressure. When the temperature of the metal melt in contact with the upper casting mould is lower than 10-360 DEG C of crystallization temperature, the upper casting mould is quickly replaced with an upper bulging mould. The surface of a cavity of the replacement upper bulging mould is the same as a final shape of a head in size. A cavity of a head blank is gradually filled with pressure gas through the main gas pipe disposed inside the core. Under the bulging action of the pressure gas, the head blank deforms in a thermoplastic way and finally in the same shape as the inner cavity of the upper bulging mould.
Description
Technical field
The present invention relates to a kind of end socket casting back air pressure expanding method and device, especially a kind of air pressure Bulging Technology of utilizing makes the refinement of foundry goods crystalline structure, improves the method and apparatus of intensity, belongs to pressure vessel manufacturing technology field.
Background technology
Seal head forming processing is the important component part in the pressure vessel manufacture process, and its quality has directly determined the safety of pressure vessel.Present small-sized end socket mainly adopts the direct stamp forming technology of steel plate, and large-sized end enclosure have to adopt the punching press of steel plate distinguish owing to receive the restriction of pressing equipment working ability, and accurately cutting again is through organizing the back welding forming.Cause problems such as stock utilization is low in the large-sized end enclosure process, production efficiency is low, commissure intensity is low, labour intensity is big.
Summary of the invention
In order to solve problems such as stock utilization is low in the large-sized end enclosure process, production efficiency is low, commissure intensity is low, labour intensity is big, the present invention proposes a kind of end socket casting back air pressure expanding method and device.
The present invention solves the method that its problem adopts: with alloy according to preparation of designing requirement ratio and fusing; The metal bath that is heated to pouring temperature is cast in the casting mold that is made up of casting patrix, base, core; In casting process, close the valve with pressure gas source UNICOM, the valve of opening vavuum pump and being attached thereto; Main tracheae through the core set inside is extracted the gas in the casting mold out, makes the die cavity pressure inside less than atmospheric pressure.When the metal bath temperature with the casting upper mould contact is lower than crystallization temperature 10～360 and spends; To cast patrix and be replaced by the bulging patrix rapidly; Bulging patrix mold cavity surface after the replacing is identical with the final appearance and size of end socket, but will on bulging, be positioned at end socket cylinder arranged outside height less than 80 millimeters by model cavity, and width is used for fixing the end socket blank less than 60 millimeters cannelure; Close vavuum pump then and be attached thereto the valve that connects; Open pressure gas source and be attached thereto the valve that connects, through being arranged at main tracheae in core charged pressure gas gradually in the end socket blank cavity, under the bulging effect of pressed gas; The end socket blank produces pyroplastic deformation, final form with bulging on the consistent shape of mold cavity.
The end socket blank is made up of flange and less convex head.Convex head part profile is similar with the end socket part that will make, and appearance and size is less than 1/2nd of the end socket diameter of part, and wall thickness is more than the twice of end socket part; The diameter of flange section is identical with the end socket diameter of part that will make, and flange arranged outside height is less than 80 millimeters, wide ring-type outer less than 60 millimeters, and also the height of flange is greater than the height of its ring-type outer; According to the entity volume of end socket part, confirm the casting volume of end socket blank according to volume equal principle before and after the distortion.
The device of realizing end socket casting back air pressure bulging is that the core with set inside master tracheae and gas permeability is separately fixed on the base with the casting patrix; The inner main tracheae of core is connected with vavuum pump with pressure gas source through valve respectively after being passed down through base, is sealedly and fixedly connected between main tracheae and the base; And the sealing of base and casting patrix removably connects, and base is fixed on 1 meter the position of being above the ground level by several post supports.On base, have the pouring in vertically clamped moulds passage, cast passage upper end is communicated with the edge of end socket blank flange, and the lower end is connected with the curved running channel that can vertically split, the curved dismountable base lower surface that is connected in of running channel.Around the pouring in vertically clamped moulds passage, near the base lower surface place cooling water channel is set, the import of cooling water channel is positioned at the lower surface of base, and outlet is positioned at the side of base.Behind casting complete, feed cooling water, the metal at this place is solidified at first, to prevent that the inner not solidified metal of end socket blank is regurgitated away from cast gate in air pressure bulging process, cause the accident.
The position near mold cavity surface of casting patrix and bulging patrix is provided with temperature sensor respectively, is used for detecting end socket process temperature conditions.Base is connected with bulging patrix rigid seal.
Bulging is closed the valve that is connected with pressure gas source after accomplishing, and will bend the running channel dismounting, from base lower surface cast gate is excised, and just can the end socket that be shaped be removed.
This beneficial effect of the invention is: the large-sized end enclosure simplified manufacturing process, be expected to realize mechanization production, and material consumption descends, and reduces labour intensity significantly, has improved production efficiency.
Description of drawings:
Below in conjunction with accompanying drawing and specific embodiment the present invention is further specified
Fig. 1 is an end socket rough-cast sketch map
Fig. 2 is an end socket air pressure bulging sketch map
1. temperature sensors, 2. outlets, 3. curved running channel 4. imports 5. bases 6. main tracheae 7. cores 8. valves 9. vavuum pumps 10. valves 11. pressure gas sources 12. end socket blanks 13. casting patrixes 14. end socket parts 15. bulging patrixes among the figure
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 the casting mold that is made up of casting patrix (13), base (5), core (7); In casting process; Close the valve (10) with pressure gas source (11) UNICOM, open vavuum pump (9) and valve (8) and the gas in the casting mold is extracted out, make the die cavity pressure inside less than atmospheric pressure through the main tracheae (6) of core set inside.When the metal bath temperature that contacts of casting patrix (13) is lower than crystallization temperature 10～360 and spends; To cast patrix and be replaced by the type patrix (15) that expands rapidly; Bulging patrix (15) die cavity after the replacing is identical with the final appearance and size of end socket, but will be positioned at end socket cylinder arranged outside height less than 80 millimeters at bulging patrix (15) die cavity, and width is used for fixing the end socket blank less than 60 millimeters cannelure; Close vavuum pump (9) and valve (8) then; Open valve (10) cut-in pressure source of the gas (11), through being arranged at main tracheae (6) in core charged pressure gas gradually in end socket blank type (12) chamber, under the bulging effect of pressed gas; End socket blank (12) produces pyroplastic deformation, and final formation with bulging (15) goes up the consistent shape of mold cavity.
End socket blank (12) is made up of flange and less convex head, and convex head part profile is similar with the end socket part (14) that will make, and appearance and size is less than 1/2nd of end socket part (14) diameter, and wall thickness is more than the twice of end socket part (14); The diameter of flange section is identical with end socket part (14) diameter that will make, and flange arranged outside height is less than 80 millimeters, wide ring-type outer less than 60 millimeters, and also the height of flange is greater than the height of its ring-type outer; According to the entity volume of end socket part (14), confirm the casting volume of end socket blank (12) according to volume equal principle before and after the distortion.
The device of realizing end socket casting back air pressure bulging be with the core (7) of set inside master tracheae (6) and gas permeability with cast patrix (13) and be separately fixed on the base (5); Pass through valve (10) respectively after the inner main tracheae (6) of core (7) is passed down through base (5), valve (8) is connected with vavuum pump (9) with pressure gas source (11), be sealedly and fixedly connected between main tracheae (6) and the base (5); And base (5) removably connects with casting patrix (13) sealing, and base (5) is fixed on 1 meter the position of being above the ground level by several post supports.On base (5), have the pouring in vertically clamped moulds passage, cast passage upper end is communicated with the edge of end socket blank (12) flange, and the lower end is connected with the curved running channel (3) that can vertically split, the curved dismountable lower surface that is connected in base (5) of running channel (3).Around the pouring in vertically clamped moulds passage, cooling water channel is set near base (5) lower surface place; The import of cooling water channel is positioned at the lower surface of base (5), and outlet is positioned at the side of base (5), behind casting complete; Feed cooling water; The metal at this place is solidified at first,, cause the accident to prevent that the inner not solidified metal of end socket blank (12) is regurgitated away from cast gate in air pressure bulging process.
The position near mold cavity surface at casting patrix (13) and bulging patrix (15) is provided with temperature sensor (1) respectively, is used for detecting end socket process temperature conditions.Base (5) is connected with bulging patrix (15) rigid seal.
Claims (6)
1. end socket casting back air pressure expanding method according to preparation of designing requirement ratio and fusing, is cast in the casting mold that is made up of casting patrix, base, core the metal bath that is heated to pouring temperature alloy; In casting process, close the valve with pressure gas source UNICOM, the valve of opening vavuum pump and being attached thereto; Main tracheae through the core set inside is extracted the gas in the casting mold out, makes the die cavity pressure inside less than atmospheric pressure, it is characterized in that: when the metal bath temperature with the casting upper mould contact is lower than crystallization temperature 10～360 and spends; To cast patrix and be replaced by the bulging patrix rapidly; Bulging patrix mold cavity surface after the replacing is identical with the final appearance and size of end socket, but will on bulging, be positioned at end socket cylinder arranged outside height less than 80 millimeters by model cavity, and width is used for fixing the end socket blank less than 60 millimeters cannelure; Close vavuum pump then and be attached thereto the valve that connects; Open pressure gas source and be attached thereto the valve that connects, through being arranged at main tracheae in core charged pressure gas gradually in the end socket blank cavity, under the bulging effect of pressed gas; The end socket blank produces pyroplastic deformation, final form with bulging on the consistent shape of mold cavity.
2. according to the said end socket casting of claim 1 back air pressure expanding method; It is characterized in that: the end socket blank is made up of flange and less convex head; Convex head part profile is similar with the end socket part that will make; Appearance and size is less than 1/2nd of the end socket diameter of part, and wall thickness is more than the twice of end socket part; The diameter of flange section is identical with the end socket diameter of part that will make, and flange arranged outside height is less than 80 millimeters, wide ring-type outer less than 60 millimeters, and also the height of flange is greater than the height of its ring-type outer; According to the entity volume of end socket part, confirm the casting volume of end socket blank according to volume equal principle before and after the distortion.
3. cast the device of back air pressure bulging according to the said end socket of claim 1; It is characterized in that: the core and the casting patrix of set inside master tracheae and gas permeability are separately fixed on the base; The inner main tracheae of core is connected with vavuum pump with pressure gas source through valve respectively after being passed down through base, is sealedly and fixedly connected between main tracheae and the base.
4. according to the device of the said end socket of claim 3 casting back air pressure bulging, it is characterized in that: base removably connects with the sealing of casting patrix, and base is fixed on 1 meter the position of being above the ground level by several post supports; On base, have the pouring in vertically clamped moulds passage; Cast passage upper end is communicated with the edge of end socket blank flange; The lower end is connected with the curved running channel that can vertically split, and the curved dismountable base lower surface that is connected in of running channel is provided with cooling water channel near the base lower surface place around the pouring in vertically clamped moulds passage; The import of cooling water channel is positioned at the lower surface of base, and outlet is positioned at the side of base.
5. according to the device of the said end socket casting of claim 3 back air pressure bulging, it is characterized in that: the position near mold cavity surface of casting patrix and bulging patrix is provided with temperature sensor respectively, is used for detecting end socket process temperature conditions.
6. according to the device of the said end socket casting of claim 3 back air pressure bulging, it is characterized in that: base is connected with bulging patrix rigid seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101053223A CN102615505A (en) | 2012-04-11 | 2012-04-11 | Method and device for pneumatic bulging after head casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101053223A CN102615505A (en) | 2012-04-11 | 2012-04-11 | Method and device for pneumatic bulging after head casting |
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| CN102615505A true CN102615505A (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101053223A Pending CN102615505A (en) | 2012-04-11 | 2012-04-11 | Method and device for pneumatic bulging after head casting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042093A (en) * | 2013-01-04 | 2013-04-17 | 太原科技大学 | Thick-wall shell metal piece forming method |
| CN108906961A (en) * | 2018-06-28 | 2018-11-30 | 陕西科技大学 | One kind passing through the swollen type of internal pressure and reversed drawing forming method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62142034A (en) * | 1985-12-10 | 1987-06-25 | メツセルシユミツト−ベルコウ−ブロ−ム・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフトウング | Manufacture of vessel through ultra-plastic deformation |
| CN101134234A (en) * | 2007-07-23 | 2008-03-05 | 陕西科技大学 | Internal pressure expansion type casting technique |
| CN101823096A (en) * | 2010-04-12 | 2010-09-08 | 燕山大学 | Semi-sliding hydraulic bulging technology of automobile axle housing part and die thereof |
-
2012
- 2012-04-11 CN CN2012101053223A patent/CN102615505A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62142034A (en) * | 1985-12-10 | 1987-06-25 | メツセルシユミツト−ベルコウ−ブロ−ム・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフトウング | Manufacture of vessel through ultra-plastic deformation |
| US4774826A (en) * | 1985-12-10 | 1988-10-04 | Mbb Gmbh | Method of making a container from a material exhibiting superplasticity |
| CN101134234A (en) * | 2007-07-23 | 2008-03-05 | 陕西科技大学 | Internal pressure expansion type casting technique |
| CN101823096A (en) * | 2010-04-12 | 2010-09-08 | 燕山大学 | Semi-sliding hydraulic bulging technology of automobile axle housing part and die thereof |
Non-Patent Citations (2)
| Title |
|---|
| 易福磊，陈海峰，李秀兵: "内压胀型铸造技术", 《热加工工艺》, vol. 40, no. 7, 3 April 2011 (2011-04-03), pages 37 - 39 * |
| 易福磊: "内压胀型铸造技术的研究", 《万方数据库硕士学位论文》, 30 November 2011 (2011-11-30) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042093A (en) * | 2013-01-04 | 2013-04-17 | 太原科技大学 | Thick-wall shell metal piece forming method |
| CN108906961A (en) * | 2018-06-28 | 2018-11-30 | 陕西科技大学 | One kind passing through the swollen type of internal pressure and reversed drawing forming method and device |
| CN108906961B (en) * | 2018-06-28 | 2020-01-10 | 陕西科技大学 | Forming method and device through internal pressure expansion and reverse drawing |
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Application publication date: 20120801 |