CN102861714A - Local vacuum infiltration method for die-casting aluminum alloy shell - Google Patents
Local vacuum infiltration method for die-casting aluminum alloy shell Download PDFInfo
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- CN102861714A CN102861714A CN2012103634936A CN201210363493A CN102861714A CN 102861714 A CN102861714 A CN 102861714A CN 2012103634936 A CN2012103634936 A CN 2012103634936A CN 201210363493 A CN201210363493 A CN 201210363493A CN 102861714 A CN102861714 A CN 102861714A
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- casting aluminum
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Abstract
The invention discloses a local vacuum infiltration method for a die-casting aluminum alloy shell, and belongs to the technical field of local infiltration. The method includes the specific steps of (1) closing an inner cavity of the die-casting aluminum alloy shell by using a sealing mechanism; (2) pouring a small quantity of organic infiltration agents on known leaking portions of the outside of the shell, and pumping inner pressure of the shell by using a vacuum pump until the pressure difference between the inside of the shell and the outside is minus 0.095MPa to 0.1MPa so that the infiltration agents can infiltrate into leaking gaps; (3) solidifying the local leaking portions by high-temperature water at the temperature of 89-91 DEG C, and blocking the leaking portions; and (4) detecting airtightness of the die-casting aluminum alloy shell by a water test. The problem that the shell cannot be integrally infiltrated conventionally is effectively solved, infiltration yield can be higher than 95%, loss quantity of the infiltration agents is quite low, production efficiency is high, infiltration cost is quite low as compared with the cost for integral infiltration, parts are not easy to knock, scratch or damage, and the surface of the die-casting aluminum alloy shell does not have residual infiltration glue.
Description
The method field
The present invention relates to a kind of local infiltration method, specifically a kind of pack alloy housing parital vacuum negative pressure infiltration method.
Background method
In aluminum alloy die casting, automobile engine cylinder-body, crankcase, speed changer, clutch housing are the several key components and parts on the automobile, its build is larger, and planform is complicated, and foundry goods is inner to be produced easily pore, the die casting defective such as loose and then cause leaking and scrap; To producing the parts of defects of die casting, the main whole impregnation technology of vacuum pressure that adopts is repaired both at home and abroad at present, but for the housing that carries out the part assembling, impregnating adhesive is the housing of easy to clean (internal structure is complicated) not, the housing that appearance and size is very large (being subjected to infiltration to fill with diameter restrictions), bowl cylinder body of type plug has been installed, beat the clutch housing leaker that seals steel ball, traditional whole impregnation technology can't carry out, because impregnating adhesive can't be is effectively broken away from totally in the narrow space and can't remedy by the routine infiltration again, can only scrap processing, cause the product waste serious.
Summary of the invention
Problem for above-mentioned existing method exists the invention provides a kind of pack alloy housing parital vacuum negative pressure infiltration method, can carry out the part with the housing that partly assembles to the cylinder body that assembled and remedy, and improves the qualification rate of product.
To achieve these goals, the concrete steps of pack alloy housing parital vacuum negative pressure infiltration method are:
(1) use sealing mechanism that pack alloy enclosure interior die cavity is sealed;
(2) a little organic impregnating agent is watered at hull outside known leaks position, use vavuum pump that enclosure interior pressure is pumped into the pressure differential with the generation-0.095Mpa-0.1Mpa of the external world, impregnant is infiltrated reveal in the space;
(3) with 89-91 ° of C high-temperature water local leak site is solidified processing, and then block defective;
(4) by the water examination pack alloy housing being carried out air-tightness detects.
Further, the infiltration time 7-9min of impregnant.
Further, the temperature of high-temperature water is 90 ° of C.
The present invention compares with existing method, adopt parital vacuum negative pressure infiltration method, thereby efficiently solve the housing that can't carry out conventional whole infiltration, such as the housing that carries out the part assembling, the impregnating adhesive not housing of easy to clean (internal structure is complicated), housing (being subjected to infiltration to fill with diameter restrictions) that appearance and size is very large; The infiltration qualification rate reaches more than 95%, and the impregnant losing quantity is few, and production efficiency is high, and the relatively whole infiltration of infiltration cost is very low, and part is difficult for colliding with, scratching damage, and the surface is residual without impregnating adhesive.
Description of drawings
Fig. 1 is parital vacuum infiltration equipment schematic diagram.
Among the figure: 1, vavuum pump, 2, magnetic valve, 3, air accumulator, 4, vacuum meter, 5, foundry goods, 6, impregnant, 7, vacuum sealing chamber.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
A kind of pack alloy housing parital vacuum negative pressure infiltration method, the concrete steps of the method are:
(1) use sealing mechanism that pack alloy enclosure interior die cavity is sealed;
(2) a little organic impregnating agent is watered at hull outside known leaks position, use vavuum pump that enclosure interior pressure is taken out pressure, formed between inside and outside the housing-pressure differential of 0.095Mpa-0.1Mpa; The infiltration time is 7-9min, at this moment between in infiltration can fully infiltrate leak site; Impregnant just had good infiltration effect originally under vacuum state, the impregnant that exists that adds pressure difference infiltrates fast to revealing in the space under the suction of-0.095Mpa-0.1Mpa;
(3) with 89-91 ° of C high-temperature water local leak site is solidified processing, and then block defective, wherein high-temperature water is 90 ° of C the bests; Under this temperature, the leakage of impregnant and housing part is in conjunction with best;
(4) by the water examination pack alloy housing being carried out air-tightness detects.
Following step is said method for the production of an example of reality:
As shown in Figure 1 foundry goods 5 to be infiltrated is placed on press seal in the vacuum sealing chamber 7, open vavuum pump 1, open-minded by magnetic valve 2 control gas circuits, use drying, air accumulator 3 to purify, lay in negative pressure air, show that by vacuum meter 4 vacuum sealing chamber's 7 internal pressure values reach-0.095Mpa-0.1Mpa, pour impregnant 6 into leak position, change with the curvature that adapts to foundry goods 5 in periphery bonding one circle rubber skirt in case of necessity, keep the about 7-9min of this negative pressure and namely finish parital vacuum negative pressure infiltration process; Then solidify processing through 90 ° of C high-temperature water and make impregnant 6 and then block defective, thereby make the pack alloy housing reach the air-tightness requirement.
Claims (3)
1. pack alloy housing parital vacuum negative pressure infiltration method is characterized in that the concrete steps of the method are:
(1) use sealing mechanism that pack alloy enclosure interior die cavity is sealed;
(2) a little organic impregnating agent is watered at hull outside known leaks position, use vavuum pump that enclosure interior pressure is pumped into the pressure differential with the generation-0.095Mpa-0.1Mpa of the external world, impregnant is infiltrated reveal in the space;
(3) with 89-91 ° of C high-temperature water local leak site is solidified processing, and then block defective;
(4) by the water examination pack alloy housing being carried out air-tightness detects.
2. a kind of pack alloy housing parital vacuum negative pressure infiltration method according to claim 1 is characterized in that the infiltration time 7-9min of described impregnant.
3. a kind of pack alloy housing parital vacuum negative pressure infiltration method according to claim 1 is characterized in that the temperature of high-temperature water is 90 ° of C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103634936A CN102861714A (en) | 2012-09-26 | 2012-09-26 | Local vacuum infiltration method for die-casting aluminum alloy shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103634936A CN102861714A (en) | 2012-09-26 | 2012-09-26 | Local vacuum infiltration method for die-casting aluminum alloy shell |
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| Publication Number | Publication Date |
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| CN102861714A true CN102861714A (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103634936A Pending CN102861714A (en) | 2012-09-26 | 2012-09-26 | Local vacuum infiltration method for die-casting aluminum alloy shell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108687332A (en) * | 2018-07-17 | 2018-10-23 | 迈凯实金属技术（苏州）有限公司 | A kind of portable part Impregnation apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065229A (en) * | 1991-04-09 | 1992-10-14 | 湖南省机械研究所 | The infiltration method and apparatus of cast tube and heavy castings |
-
2012
- 2012-09-26 CN CN2012103634936A patent/CN102861714A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065229A (en) * | 1991-04-09 | 1992-10-14 | 湖南省机械研究所 | The infiltration method and apparatus of cast tube and heavy castings |
Non-Patent Citations (1)
| Title |
|---|
| 张成恩等: "大型铸件局部浸渗工艺及设备的研究", 《机械工程材料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108687332A (en) * | 2018-07-17 | 2018-10-23 | 迈凯实金属技术（苏州）有限公司 | A kind of portable part Impregnation apparatus |
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Application publication date: 20130109 |