CN111054896A - Water-cooling dummy bar head device for casting - Google Patents
Water-cooling dummy bar head device for casting Download PDFInfo
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- CN111054896A CN111054896A CN202010015162.8A CN202010015162A CN111054896A CN 111054896 A CN111054896 A CN 111054896A CN 202010015162 A CN202010015162 A CN 202010015162A CN 111054896 A CN111054896 A CN 111054896A
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- cooling water
- water tank
- casting
- cooling
- cylindrical base
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- 238000005266 casting Methods 0.000 title claims abstract description 30
- 238000001816 cooling Methods 0.000 title claims abstract description 9
- 239000000498 cooling water Substances 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000009826 distribution Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 5
- 238000007711 solidification Methods 0.000 abstract description 10
- 230000008023 solidification Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
- B22D11/081—Starter bars
- B22D11/083—Starter bar head; Means for connecting or detaching starter bars and ingots
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
A water-cooling dummy bar head device for casting belongs to the technical field of dummy bar head devices. The technical scheme of the invention is as follows: a water-cooled dummy bar head device for casting, wherein: comprises a cylindrical base and a cooling water tank; a connecting circular truncated cone is arranged below the cylindrical base, the cooling water tank is arranged below the connecting circular truncated cone, and two mounting supports are vertically arranged on the bottom surface of the cooling water tank; a dovetail groove is formed in one side of the top surface of the cylindrical base, and a chamfer is formed in the peripheral direction of the edge of the top surface of the cylindrical base; the water inlet is arranged at the lower part of the side wall of one side of the cooling water tank and is connected with a water inlet pipeline, the water outlet is arranged at the upper part of the side wall of the other side of the cooling water tank, and the water outlet is connected with a water outlet pipeline. The invention has the advantages of simple structure, good cooling effect, being beneficial to sequential solidification of cast ingots from bottom to top and the like.
Description
Technical Field
The invention belongs to the technical field of dummy bar head devices, and particularly relates to a water-cooled dummy bar head device for casting.
Background
The demand of the Chinese energy industry on large forgings is continuously increased, and along with the increase of the weight of steel ingots, the phenomena of composition segregation, solidification defects and the like are aggravated, and the subsequent forging difficulty is increased. During the manufacturing process of the large-scale casting and forging piece, the volume and the mass of the casting piece are huge. After a large amount of molten metal is poured, heat is concentrated and is not easy to dissipate, and the upper center of the cast which is finally solidified is easy to have the defects of shrinkage cavity, shrinkage porosity and the like under the action of heat concentration and buoyancy. In the pouring process, the molten metal is easy to oxidize when contacting with air, so that a large amount of non-metallic inclusions are formed, and the structure and the performance of a casting are also adversely affected. The non-directional solidification easily causes different grain growth directions, so that the structure is easy to generate macrosegregation. According to statistics, 60% of unqualified products in the production of large forgings are caused by the quality problem of cast ingots.
In order to solve the problems, a novel large-scale steel ingot (billet) progressive casting solidification forming technology is provided, the invention is a patent of 'a large-scale steel ingot or billet progressive solidification forming method' (patent number 201811050552.8), the design and solidification characteristics of the invention use the thought of additive manufacturing for reference, the comprehensive advantages of electroslag metallurgy and continuous casting are integrated, the invention is different from the traditional large-scale steel ingot one-step forming technology, the large-scale steel ingot or billet is separately and discretely cast in different areas based on the additive manufacturing discrete accumulation principle, and is gradually accumulated and solidified to form the steel ingot with the target required shape and size. The technology effectively reduces the defects of segregation, looseness, shrinkage cavity and the like in the cast ingot, and the product has the advantages of high purity, uniform and compact crystalline structure, smooth surface and the like. Based on the technology, a novel movable substrate of the crystallizer is urgently needed, and can simultaneously meet the needs of dummy ingots and strengthen the heat exchange effect, so that the cast ingots are solidified and cooled in the sequence from bottom to top.
It is known from the published patent that the existing dummy bar head structure is a metal block with a top slot or a hook structure, which mainly serves for the conventional continuous casting dummy bar, i.e. the dummy bar head and part of the transition piece enter the crystallizer before casting to form a movable "inner bottom" of the crystallizer, after the casting begins, the molten steel is chilled by the crystallizer, solidified and cooled, and is connected with the dummy bar head, the dummy bar is drawn by the withdrawal and straightening machine, the casting blank is continuously withdrawn from the crystallizer until the dummy bar head is separated from the casting blank by the rear part of the withdrawal and straightening machine, and then enters the dummy bar storage device. In the process, the heat of the molten metal is mainly dissipated through heat exchange with the wall of the water-cooled copper crystallizer, and the melt is cooled from outside to inside in sequence. Therefore, the prior art can not simultaneously meet the functions of dummy ingot and ingot casting solidification from bottom to top, and the technical problems of thermal stress cracking, casting-on core-pulling steel leakage, non-drop of the dummy ingot head and the like can easily occur in the casting process of the large round billet due to uneven cooling and insufficient cooling strength during casting.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a water-cooled dummy bar head device for casting, which aims to solve the technical problem that the existing dummy bar head cannot simultaneously meet the requirements of dummy bars and enable cast ingots to be solidified in a sequence from bottom to top.
In order to solve the problems, the technical scheme of the invention is as follows: a water-cooled dummy bar head device for casting, wherein: comprises a cylindrical base and a cooling water tank;
a connecting circular truncated cone is arranged below the cylindrical base, the cooling water tank is arranged below the connecting circular truncated cone, and two mounting supports are vertically arranged on the bottom surface of the cooling water tank; the circular connecting flange is arranged in the circumferential direction of the lower end of the connecting circular platform and the circumferential direction of the upper end of the cooling water tank, the circular mounting flange is arranged in the circumferential direction of the lower end of the cooling water tank, a plurality of connecting holes are formed in the circular connecting flange and the circular mounting flange, and the mounting support is provided with mounting holes; the annular connecting flange in the circumferential direction of the lower end of the connecting circular truncated cone is connected with the annular connecting flange in the circumferential direction of the upper end of the cooling water tank through a bolt, the annular mounting flange is connected with the crystallizer supporting seat through a bolt, and the mounting support is connected with the dummy bar transition piece through a mounting hole through a bolt;
a dovetail groove is formed in one side of the top surface of the cylindrical base, and a chamfer is formed in the peripheral direction of the edge of the top surface of the cylindrical base; the water inlet is arranged at the lower part of the side wall of one side of the cooling water tank and is connected with a water inlet pipeline, the water outlet is arranged at the upper part of the side wall of the other side of the cooling water tank, and the water outlet is connected with a water outlet pipeline.
Further, a cooling water distribution plate is vertically arranged on one side, close to the water inlet, of the inner cavity of the cooling water tank body, a plurality of distribution holes are formed in the cooling water distribution plate, and a plurality of reinforcing ribs are vertically arranged in a cavity between the cooling water distribution plate and the water outlet of the cooling water tank body.
Furthermore, the cooling water tank, the cooling water flow distribution plate, the reinforcing ribs, the water inlet pipeline and the water outlet pipeline are all formed by integral casting.
Furthermore, the diameter of the diversion holes is smaller than that of the water inlet, and the axes of the diversion holes are respectively vertical to the axes of the reinforcing ribs.
By adopting the technical scheme, the invention meets the requirements of ingot guiding and ingot cooling speed improvement, reduces the local solidification time, leads the ingot to form sequential solidification from bottom to top, has simple structure and good effect, and is greatly beneficial to the upgrading and reconstruction of the existing equipment; due to the existence of the flow divider and the reinforcing ribs, the cooling water is more uniformly distributed in the water tank, the reinforcing ribs promote the turbulent flow of the cooling water, the convective heat transfer coefficient is increased, the connection between the dummy bar head and the cast ingot is more reliable, and the method has a good prevention effect on the problems of casting start, ingot drawing, steel leakage, melting of the dummy bar head, no falling off and the like in the casting process of the large round billet. Compared with the prior art, the invention has the advantages of simple structure, good cooling effect, being beneficial to ingot casting formation and sequential solidification from bottom to top, and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view showing the internal structure of a cooling water tank according to the present invention;
fig. 3 is a schematic diagram of the arrangement of the water inlet and outlet pipes of the water tank in the invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 to 3, in the present embodiment, a water-cooled dummy bar head device for casting includes: comprises a cylindrical base 1 and a cooling water tank 2;
a connecting circular truncated cone 3 is arranged below the cylindrical base 1, the cooling water tank 2 is arranged below the connecting circular truncated cone 3, and two mounting supports 4 are vertically arranged on the bottom surface of the cooling water tank 2; the lower end of the connecting circular truncated cone 3 and the upper end of the cooling water tank 2 are both provided with an annular connecting flange 5 in the circumferential direction, the lower end of the cooling water tank 2 is provided with an annular mounting flange 6 in the circumferential direction, the annular connecting flange 5 and the annular mounting flange 6 are both provided with a plurality of connecting holes, and the mounting support 4 is provided with mounting holes; the annular connecting flange 5 in the circumferential direction of the lower end of the connecting circular truncated cone 3 is connected with the annular connecting flange 5 in the circumferential direction of the upper end of the cooling water tank 2 through bolts, the annular mounting flange 6 is connected with the crystallizer supporting seat through bolts, and the mounting support 4 is connected with the dummy bar transition piece through a mounting hole through bolts;
a dovetail groove 7 is formed in one side of the top surface of the cylindrical base 1, and a chamfer is formed in the circumferential direction of the edge of the top surface of the cylindrical base 1, so that the inner wall of a crystallizer is prevented from being scratched when the cylindrical base is assembled with the crystallizer; a water inlet 8 is formed in the lower portion of the side wall of one side of the cooling water tank 2, a water inlet pipeline of the water inlet 8 is connected, a water outlet 9 is formed in the upper portion of the side wall of the other side of the cooling water tank 2, and the water outlet 9 is connected with a water outlet pipeline, as shown in fig. 3.
Further, 2 box inner chambers of cooling water tank are close to 8 one sides of water inlet vertical cooling water flow distribution plate 10 that are equipped with, be equipped with a plurality of diffluence orifices 11 on the cooling water flow distribution plate 10, vertically in the cavity between 2 box cooling water flow distribution plates of cooling water tank 10 and the delivery port 9 being equipped with a plurality of strengthening ribs 12, both can show the intensity that improves cooling water tank 2, prevent to warp, can increase again with the heat transfer area of cooling water, be favorable to the heat to scatter and disappear, reduce the thermal stress of initial ingot casting.
Further, cooling water tank 2, cooling water flow distribution plate 10, a plurality of strengthening ribs 12, inlet channel and outlet conduit all adopt the integral type casting to form, have guaranteed the intensity and the leakproofness of water tank furthest, prevent the cooling water seepage, have improved the operation security.
Furthermore, the diameter of the diversion holes is smaller than that of the water inlet 8, the axes of the diversion holes 11 are respectively vertical to the axes of the reinforcing ribs 12, the axes of the diversion holes 11 are vertical to the axes of the reinforcing ribs 12, the flow of cooling water in the water tank belongs to turbulent flow according to fluid mechanics knowledge, and when the fluid sweeps across the cylinder and the impact angle is 90 degrees, the heat exchange coefficient reaches the maximum value.
The working process and principle of the invention are as follows:
when the device is used, firstly, an annular connecting flange 5 in the circumferential direction of the lower end of a circular truncated cone 3 and an annular connecting flange 5 in the circumferential direction of the upper end of a cooling water tank 2 are connected through bolts, water on the surface of a dummy bar head is blown off by compressed air, then an annular mounting flange 6 is connected with a crystallizer supporting seat through bolts, a mounting support 4 is connected with a dummy bar transition piece through a mounting hole through bolts, and a joint between the dummy bar head and a crystallizer is filled with a fine asbestos rope;
and (3) respectively connecting the water inlet pipeline and the water outlet pipeline with a circulating water system, and starting casting after determining that the water level and the water pressure of the crystallizer and the water tank at the bottom of the dummy ingot head are normal. Molten metal is poured from the upper opening of the crystallizer, the high-temperature molten metal in contact with the cylindrical base 1 can quickly fill a cavity formed by the water-cooled crystallizer and the water-cooled dummy bar head, and the molten metal flows into the dovetail groove;
under the action of the water-cooled crystallizer and the water-cooled dummy bar head, the liquid metal is directionally solidified and crystallized from bottom to top, and when the strength of the solidified cast ingot is enough to resist the static pressure of the liquid metal, the dummy bar device pulls the dummy bar head through the dummy bar to pull the cast ingot out of the crystallizer.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010015162.8A CN111054896A (en) | 2020-01-07 | 2020-01-07 | Water-cooling dummy bar head device for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010015162.8A CN111054896A (en) | 2020-01-07 | 2020-01-07 | Water-cooling dummy bar head device for casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111054896A true CN111054896A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010015162.8A Pending CN111054896A (en) | 2020-01-07 | 2020-01-07 | Water-cooling dummy bar head device for casting |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054689A (en) * | 2021-11-15 | 2022-02-18 | 太原科技大学 | A casting device for large gear steel ingot and its casting method |
| US20220362838A1 (en) * | 2021-05-11 | 2022-11-17 | Wagstaff, Inc. | Starting head for a continuous casting mold and associated method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08141705A (en) * | 1994-11-14 | 1996-06-04 | Shinko Electric Co Ltd | Cold wall induction melting continuous casting apparatus |
| JPH09285851A (en) * | 1996-04-24 | 1997-11-04 | Sumitomo Metal Ind Ltd | Dummy bar head for continuous casting |
| JPH11216539A (en) * | 1998-01-29 | 1999-08-10 | Nkk Corp | Dummy bar head for continuous casting |
| KR200285344Y1 (en) * | 2002-05-22 | 2002-08-13 | 주식회사 포스코 | Dummy bar head for preventing crack on tourching part of molten steel |
| JP2010017749A (en) * | 2008-07-11 | 2010-01-28 | Sinfonia Technology Co Ltd | Melting furnace, continuous casting apparatus, and casting method for continuous casting apparatus |
| CN201529758U (en) * | 2009-07-21 | 2010-07-21 | 武汉大西洋连铸设备工程有限责任公司 | Water-cooling dummy ingot head apparatus with water-cooling directional freezing casting blank end-face |
| CN104668524A (en) * | 2015-03-20 | 2015-06-03 | 江苏海事职业技术学院 | Bottom water tank for casting device |
| CN208528040U (en) * | 2018-07-13 | 2019-02-22 | 新疆八一钢铁股份有限公司 | The cooling device of conticaster steel billet straightening section leading ingot storage shelf girder steel |
| CN211679909U (en) * | 2020-01-07 | 2020-10-16 | 太原科技大学 | Water-cooling dummy bar head device for casting |
-
2020
- 2020-01-07 CN CN202010015162.8A patent/CN111054896A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08141705A (en) * | 1994-11-14 | 1996-06-04 | Shinko Electric Co Ltd | Cold wall induction melting continuous casting apparatus |
| JPH09285851A (en) * | 1996-04-24 | 1997-11-04 | Sumitomo Metal Ind Ltd | Dummy bar head for continuous casting |
| JPH11216539A (en) * | 1998-01-29 | 1999-08-10 | Nkk Corp | Dummy bar head for continuous casting |
| KR200285344Y1 (en) * | 2002-05-22 | 2002-08-13 | 주식회사 포스코 | Dummy bar head for preventing crack on tourching part of molten steel |
| JP2010017749A (en) * | 2008-07-11 | 2010-01-28 | Sinfonia Technology Co Ltd | Melting furnace, continuous casting apparatus, and casting method for continuous casting apparatus |
| CN201529758U (en) * | 2009-07-21 | 2010-07-21 | 武汉大西洋连铸设备工程有限责任公司 | Water-cooling dummy ingot head apparatus with water-cooling directional freezing casting blank end-face |
| CN104668524A (en) * | 2015-03-20 | 2015-06-03 | 江苏海事职业技术学院 | Bottom water tank for casting device |
| CN208528040U (en) * | 2018-07-13 | 2019-02-22 | 新疆八一钢铁股份有限公司 | The cooling device of conticaster steel billet straightening section leading ingot storage shelf girder steel |
| CN211679909U (en) * | 2020-01-07 | 2020-10-16 | 太原科技大学 | Water-cooling dummy bar head device for casting |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220362838A1 (en) * | 2021-05-11 | 2022-11-17 | Wagstaff, Inc. | Starting head for a continuous casting mold and associated method |
| US12023727B2 (en) * | 2021-05-11 | 2024-07-02 | Wagstaff, Inc. | Starting head for a continuous casting mold and associated method |
| CN114054689A (en) * | 2021-11-15 | 2022-02-18 | 太原科技大学 | A casting device for large gear steel ingot and its casting method |
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