CN1827257A - Improvement of feeding efficiency by laser heating of metal in riser head - Google Patents
Improvement of feeding efficiency by laser heating of metal in riser head Download PDFInfo
- Publication number
- CN1827257A CN1827257A CN 200510031287 CN200510031287A CN1827257A CN 1827257 A CN1827257 A CN 1827257A CN 200510031287 CN200510031287 CN 200510031287 CN 200510031287 A CN200510031287 A CN 200510031287A CN 1827257 A CN1827257 A CN 1827257A
- Authority
- CN
- China
- Prior art keywords
- metal
- laser
- rising head
- riser
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 44
- 238000004093 laser heating Methods 0.000 title claims description 6
- 238000005266 casting Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 17
- 230000000630 rising effect Effects 0.000 claims description 42
- 238000005516 engineering process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000003031 feeding effect Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000004576 sand Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a method that heating the metal inside the riser to improve the feeding efficiency in the process of cast molding. The method uses the liquid metal inside the riser to fill the slits left by shortened volume in the processes of cooling and solidifying liquid metal when in casting. The invention uses the laser to heat the metal liquid level inside the riser to keep the liquid condition; therefore, the feeding channel can keep free in the metal solidification process to improve the feeding efficiency. The invention can avoid sand into the die cavity to cause defect, and it uses the laser with higher electric-optical transformation efficiency to reduce the cost. The invention also provides the technique keys and parameters.
Description
One, technical field
The present invention relates to the casting technique in a kind of metal material moulding field.Specifically, relate to a kind of method that adds metal in the hot riser, raising feeding efficiency that is used for the foundry goods forming process.
Two, background technology
In casting process, liquid metal is poured into a mould into after the casting mold, gradually cooling, coagulation forming.In this process, because metal temperature reduces and undergoes phase transition to solid-state from liquid state, metal volume is dwindled.If do not obtain the space that sufficient liquid metal comes filling to stay because of volume contraction in cooling and process of setting, it is loose to produce macrocavity or microcosmic, reduces casting quality greatly, and may cause foundry goods to be scrapped.Therefore, on technology, rising head to be set usually, in liquid metal cooling and process of setting, replenish the volume that dwindles and enter the space that stays with the liquid metal in the rising head.
At rising head and be subjected to keep between the feeding position feeding passage and just can carry out feeding.In the actual casting process, because metal also can equally with the metal that forms foundry goods cool off and solidify in the rising head, the feeding passage cannot not held time longly, so the feeding effect is often undesirable.In order to improve feeding capacity, adopted the method for rising head being carried out heat tracing.At present the method for heat tracing rising head be in rising head, add some with the liquid metal effect after generation heat or reduce the material of thermal loss.Normally in making the casting mold process, emitting shape of the mouth as one speaks wall position to add these heatings or insulation material, the perhaps special-purpose heat preservation rising head of making.
Three, summary of the invention
Though aforementioned this heat preservation rising head can improve feeding efficiency, but because metal constantly reduces when replenishing casting mold in the rising head, also reduce gradually with the contact-making surface of heat preservation material thereupon, time and degree that the interior metal of rising head is heated insulation are limited, and the effect that therefore improves feeding efficiency is limited.And this heat tracing rising head troublesome poeration is unfavorable for realizing automation, and operation the time causes easily that sand grains etc. enters die cavity, causes defectives such as foundry goods scab.
The present invention proposes a kind of method of new raising riser supplement shrink efficiency, promptly improves feeding efficiency with metal in the LASER HEATING rising head.This method adopts laser irradiation rising head inner metal liquid face, adds the interior metal of hot riser (comprising riser neck) and makes it keep liquid state.Because the interior metal of rising head (comprising riser neck) is in liquid state all the time in the metal solidification process in casting mold, the feeding passage is unimpeded always, be subjected to the feeding position in metal cooled and solidified process, can access replenishing of enough liquid metals, can reach desirable feeding effect, eliminate defectives such as shrinkage cavity, shrinkage porosite.In addition, because the effect that the laser irradiation time does not produce mechanical force, can not cause that therefore sand grains etc. enters die cavity and causes casting defect.In laser irradiation process, laser energy is used for compensating the radiation of rising head inner metal surface and conducts dispersed heat by casting mold.Because liquid metal is generally bigger to the absorptivity of laser, if the electric light transformation efficiency of used laser instrument is higher, as CO
2Or semiconductor laser etc., add because of feeding efficiency improves to reduce riser metal volume and foundry goods loss from spoilage that then the cost of whole technology can not improve, even can be lower than the cost of traditional heating insulated feeder.
The present invention proposes the technology main points of metal in the LASER HEATING rising head.Entered by cast in the process of casting mold at liquid metal, when metal in the type reached a certain amount of, liquid metal began to enter rising head (entering the asynchronism(-nization) of top riser and approaching side rising head).The a certain moment after liquid metal begins to be exposed in the air in rising head, laser beam irradiation rising head inner metal liquid face with certain power, suitable spot size, make the interior metal of rising head (comprising riser neck) keep liquid, when (cast finish certain hour after) foundry goods is solidified by the feeding position to be about to finish, stop the laser irradiation.
The present invention has also illustrated the computational methods of the technological parameter of laser irradiation rising head inner metal liquid face.Because laser energy is used for compensating the radiation of rising head inner metal surface and conducts dispersed heat, so required laser power P by casting mold
lJust by liquid metal to the heat P by surface emissivity in the time of metallic flat in the absorptivity α of laser, the rising head
rWith by casting mold conduction dispersed heat P
cDecision, i.e. α P
l=P
r+ P
cAccording to casting process parameters (pouring temperature and speed etc.), casting structure and material thermophysical property and casting mold characteristic etc., calculate casting solidification time, rising head size etc., the decision laser irradiation beginning and ending time; By the spot size of rising head size decision laser beam on metal bath surface, guarantee the energy loss minimum, surface oxidation is also minimum as far as possible.
Four, description of drawings
Fig. 1 is laser irradiation rising head inner metal liquid face schematic diagram, and running gate system does not draw in the drawings.1 is laser beam among the figure, and 2 is the rising head inner metal liquid, and 3 is casting mold, and 4 is foundry goods die cavity inner metal liquid.
Five, the specific embodiment
Before implementing the present invention, must calculate relevant technological parameter earlier, and result of calculation is set at the technological parameter initial value.At first, according to casting process parameters, casting structure and material thermophysical property and casting mold characteristic etc., calculate casting solidification time, the foundry goods position that needs feeding and the volume of additional metal, the time that the shape size of decision rising head and position and feeding passage are kept; Calculate interior heat P of metallic flat time in the rising head then by surface emissivity
rWith by casting mold conduction dispersed heat P
c, because can clear and definite liquid metal to the absorptivity α of laser, with formula α P
l=P
r+ P
cObtain laser power P
l(actual power also need be by P
lMultiply by an empirical coefficient relevant with the degree of superheat and irradiation time), the time of keeping according to feeding passage needs is determined the time of laser irradiation.
Specific implementation process: 1) be ready to LASER Light Source, checkout gear etc., behind laser head, liquid level sensor aligning rising head, beginning pouring liquid metal; 2) after the metal bath surface checkout gear detects interior liquid level of rising head and temperature thereof, signal is transferred to computer, computer begins irradiation time according to the laser of the former setting of liquid level temperature correction; 3) computer begins irradiation time according to revised laser and sends and begin irradiation instruction, and laser begins to shine metal bath surface; 4) after cast finished, computer finished irradiation time according to the laser of the former setting of real-time detected temperature correction; 5) computer stops irradiation time according to revised laser and sends and stop irradiation instruction, and laser stops to shine metal bath surface.
Claims (3)
1, this patent has proposed a kind of method that improves riser supplement shrink efficiency in the foundry goods forming process, promptly with metal, raising feeding efficiency in the LASER HEATING rising head, its major technique feature is: adopt laser irradiation rising head inner metal liquid face, add the interior metal of hot riser (comprising riser neck), make it keep liquid, keep the feeding passage, reach desirable feeding effect.
2, the method that adds metal in the hot riser, improves feeding efficiency according to claim 1, the feature of this patent also is: the technology main points of metal in the LASER HEATING rising head, promptly liquid metal begins to be exposed to a certain moment of back in the air in rising head, laser beam irradiation rising head inner metal liquid face with certain power, after cast finishes certain hour, be that foundry goods is solidified when finishing by the feeding position, stop the laser irradiation.
3, the method that adds metal in the hot riser, improves feeding efficiency according to claim 1, the feature of this patent also is: definite method of the technological parameter of laser irradiation rising head inner metal liquid face, promptly laser power by liquid metal to the absorptivity of laser, the radiation of rising head inner metal surface with by the decision of casting mold conduction dispersed heat; According to casting process parameters (pouring temperature and speed etc.), casting structure and material thermophysical property and casting mold characteristic etc., the decision laser irradiation beginning and ending time; By the spot size of decision laser beams such as rising head size on metal bath surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100312875A CN100418671C (en) | 2005-02-28 | 2005-02-28 | Improvement of feeding efficiency by laser heating of metal in riser head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100312875A CN100418671C (en) | 2005-02-28 | 2005-02-28 | Improvement of feeding efficiency by laser heating of metal in riser head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1827257A true CN1827257A (en) | 2006-09-06 |
| CN100418671C CN100418671C (en) | 2008-09-17 |
Family
ID=36945927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100312875A Expired - Fee Related CN100418671C (en) | 2005-02-28 | 2005-02-28 | Improvement of feeding efficiency by laser heating of metal in riser head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100418671C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905287A (en) * | 2010-08-18 | 2010-12-08 | 中核苏阀横店机械有限公司 | Open riser |
| CN110170637A (en) * | 2019-05-28 | 2019-08-27 | 深圳市万泽中南研究院有限公司 | A kind of equipment and technology keeping casting directional solidification process stability |
| CN112517889A (en) * | 2020-10-30 | 2021-03-19 | 中国航发北京航空材料研究院 | Dynamic riser heating system and method in casting process of titanium alloy casing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1130271C (en) * | 2000-08-07 | 2003-12-10 | 史保萱 | Casting technology by squeezing riser head for compensating shrink |
| CN2452648Y (en) * | 2000-11-02 | 2001-10-10 | 沈兴关 | Temp. keeping riser |
-
2005
- 2005-02-28 CN CNB2005100312875A patent/CN100418671C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905287A (en) * | 2010-08-18 | 2010-12-08 | 中核苏阀横店机械有限公司 | Open riser |
| CN110170637A (en) * | 2019-05-28 | 2019-08-27 | 深圳市万泽中南研究院有限公司 | A kind of equipment and technology keeping casting directional solidification process stability |
| CN110170637B (en) * | 2019-05-28 | 2021-05-25 | 深圳市万泽中南研究院有限公司 | Equipment and process for maintaining stability of casting in directional solidification process |
| CN112517889A (en) * | 2020-10-30 | 2021-03-19 | 中国航发北京航空材料研究院 | Dynamic riser heating system and method in casting process of titanium alloy casing |
| CN112517889B (en) * | 2020-10-30 | 2021-12-24 | 中国航发北京航空材料研究院 | Dynamic riser heating system and method in casting process of titanium alloy casing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100418671C (en) | 2008-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103143675A (en) | Process for casting ball iron flywheel by iron model sand covering | |
| CN103978156B (en) | A kind of method controlling investment-casting solidification and cooling | |
| CN104525858B (en) | Vacuum pressing and casting electronic appliance mold aluminium alloy castings built-in pipe technique | |
| CN113399641B (en) | High-density die-casting forming method of aluminum alloy die casting | |
| CN106890985A (en) | It is a kind of for manufacturing casting device and method without shrinkage cavity casting | |
| CN107042284A (en) | A kind of device for sand coated iron mould method for producing steel-casting | |
| JP5120295B2 (en) | Low pressure casting mold | |
| KR101264893B1 (en) | Injection Mold Die of Air Cooling System And Method for The Same | |
| CN105583366A (en) | Precision casting method for thin-wall high-temperature alloy floating wall tiles | |
| CN100418671C (en) | Improvement of feeding efficiency by laser heating of metal in riser head | |
| CN104550855A (en) | Casting technique of imbedding type composite hammerhead | |
| CN102626779A (en) | Method for preparing magnesium alloy ingot and solidification system | |
| CN201455235U (en) | Water-cooling mechanism | |
| CN109848368A (en) | Sand mold casting mold and casting method | |
| CN102941338B (en) | Method and device for controlling cooling speed of core assembling casting | |
| CN107737874A (en) | Heat resisting cast steel turbocharger turbine housing iron die sand casting process | |
| CN111250664A (en) | Method for preventing cracks of valve body casting of low-pound-grade large-caliber check valve | |
| CN102350485A (en) | Device and process for repairing shrinkage holes during steel billet casting through intermediate-frequency electric heating | |
| CN115630522A (en) | Ultra-large integrated die-casting product size control method | |
| JPH07155897A (en) | Mold structure and casting method | |
| CN203044873U (en) | Water cooling device for controlling cooling rate in core assembly casting | |
| Majerník et al. | Evaluation of the temperature distribution of a die casting mold of X38CrMoV5_1 steel | |
| CN110653340B (en) | Manufacturing method of external block steel casting of width fixing machine | |
| CN112453324A (en) | Investment casting method based on novel casting system | |
| CN105964980B (en) | A kind of hot investment casting equipment of thin-wall box body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANGSHA JIACHENG MACHINERY MANUFACTURING CO., LTD Free format text: FORMER OWNER: LIU JICHANG Effective date: 20110901 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 410082 CHANGSHA, HUNAN PROVINCE TO: 410208 CHANGSHA, HUNAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110901 Address after: 410208, Hunan City, Changsha Province town, Changsha Yuelu science and Technology Industrial Park Administrative Committee comprehensive service building Patentee after: CHANGSHA JIA-CHENG MACHINERY MANUFACTURING CO., LTD. Address before: 410082 School of mechanical and automotive engineering, Hunan University, Changsha, Hunan, Patentee before: Liu Jichang |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20130228 |