CN103785575B - A kind of die casting housing overall vacuum negative pressure Impregnation apparatus and method - Google Patents
A kind of die casting housing overall vacuum negative pressure Impregnation apparatus and method Download PDFInfo
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- CN103785575B CN103785575B CN201410039378.2A CN201410039378A CN103785575B CN 103785575 B CN103785575 B CN 103785575B CN 201410039378 A CN201410039378 A CN 201410039378A CN 103785575 B CN103785575 B CN 103785575B
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Abstract
The invention discloses a kind of die casting housing overall vacuum negative pressure Impregnation apparatus and method, wherein equipment comprises impregnant case (3), air accumulator (7), be arranged on impregnant case (3) top and piston end is attached thereto the oil cylinder (8) connect, be positioned at the sealing mechanism (1) between oil cylinder (8) and impregnant case (3), the control cabinet (4) be connected with oil cylinder (8), and the vacuum meter (5) be arranged on control cabinet (4) and vavuum pump (6); Described sealing mechanism (1) can be completely closed by the die cavity that die casting housing (2) is inner, and vavuum pump (6) is by air accumulator (7) communication seals mechanism (1).The all inner die cavity treating compregnate foundry goods housing is just sealed, so the die casting such as housing, housing that appearance and size is very large efficiently solving housing as carried out part assembling, impregnating adhesive not easy to clean cannot carry out the problem of conventional monolithic infiltration before infiltration.
Description
Technical field
The present invention relates to a kind of die casting housing overall vacuum negative pressure Impregnation apparatus and method, especially for installing the cylinder body of bowl-type plug, beating the leaker of the internal structure complexity such as clutch housing of sealing steel ball.
Background technology
In auto manufacturing, a lot of valve class, pump class, motor body etc. all adopt zinc, aluminium alloy compression casting forms, owing to being not easy to control Homogeneous cooling speed in forming process, the impact of impurity in alloy, many-sided reason such as mould and equipment, cast-internal can be caused to contain gas and produce the defects such as pore, shrinkage cavity, tissue looseness, this defect is with the naked eye difficult to find.The existence of defect will cause the media leaks sealed, increase the wearing and tearing of machine tool, bring the increase of production cost simultaneously, arriving that product quality is difficult to ensures, especially the vehicle key parts such as automobile engine cylinder-body, crankcase, speed changer, clutch housing, its build is comparatively large, and planform is complicated, and cast-internal more easily produces pore, the defects of die casting such as loose and then causes leaking and scrapping.
For solving the high problem of casting wasted product rate, the main overall infiltration process of vacuum pressure that adopts is repaired both at home and abroad at present, be exactly impregnant is penetrated in the micropore of aluminium casting under certain condition, after overcuring, make the filler infiltrated in hole be connected with foundry goods hole inwall, block micropore, make part can meet the technology of the conditions such as pressurization, antiseepage and leakproof, the application of this technology makes the qualification rate of foundry goods reach more than 90%.Existing negative pressure of vacuum Infiltration Technics process is generally first loaded by foundry goods in special cage, then hang in infiltration cylinder, airtight infiltration cylinder cap, suction is to certain value and continue for some time, to extract the air of casting defect inside out, inject infiltration liquid, due to capillarity, infiltration liquid penetrates into the hole of casting defect, then the compressed air that pressure is 0.5-0.6MPa is passed into, pressurize 20min, makes infiltration liquid fill up hole, and fully combines with its surface.Foundry goods after infiltration hardens through cleaning, drying, make colloid, reaches the object preventing seepage.
Test shows: vacuum pressure infiltration, and gelatin viscosity is less, and penetrating power is stronger; Kong Yue little, capillarity is larger, more easily infiltrates, so die casting, metallic sintered products, due to good compactness, impregnation effect will due to foundry goods; Vacuum is higher, and the air scavenge in micropore is more thorough, and the easier infiltration into microporous of glue is inner; Pressure is higher, the dwell time is longer, and it is darker that infiltration liquid infiltrates foundry goods pore defect.In addition, the geometry of part also has impact to infiltration effect, and the wall of part is thicker, easier impregnation, otherwise effect is poorer, because part wall is thinner, glue will flow out before uncured from part, or runs off in cleaning process.But, especially for installing the cylinder body of bowl-type plug, beating the leaker of the internal structure complexity such as the clutch housing that seals steel ball, because impregnating adhesive cannot effectively depart from clean in narrow tortuous spaces (as " L ", T-shape structure etc.), so can not make up with traditional overall infiltration process, once occur that this series products can only do by leakage problem to scrap process, product quality is caused to lose serious.
Summary of the invention
For above-mentioned existing technical problem, the invention provides a kind of die casting housing overall vacuum negative pressure Impregnation apparatus and method, the housing that can assemble for the cylinder body assembled and part specially carries out entirety and makes up, and improves the qualification rate of product.
For achieving the above object, the invention provides a kind of die casting housing overall vacuum negative pressure Impregnation apparatus, comprise impregnant case, air accumulator, also comprise support, impregnant case is arranged on frame bottom, is arranged on cradle top and the oil cylinder that is connected with impregnant case of piston end, the sealing mechanism between oil cylinder and impregnant case, the control cabinet be connected with oil cylinder, and the vacuum meter be arranged on control cabinet and vavuum pump; Described sealing mechanism can will treat that the die cavity of compregnate foundry goods enclosure interior is completely closed, and vavuum pump is by air accumulator communication seals mechanism.
The invention provides a kind of die casting housing overall vacuum negative pressure infiltration process, concrete steps are:
A, sealing: use sealing mechanism by completely closed for the inside die cavity of die casting housing to be infiltrated;
B, infiltration: utilize hydraulic oil cylinder driving impregnant case to rise, until whole die casting housing is all immersed in impregnant, then start vavuum pump to bleed to die casting enclosure interior, the pressure differential of-0.095Mpa-0.1Mpa is formed between making inside and outside die casting housing, after impregnant infiltrates fast in the leakage space of die casting housing, then die casting housing is taken out from impregnant;
C, solidification: the die casting housing of taking-up is carried out high-temperature water solidification process, impregnant generation curing reaction and then the leakage space blocked on it.
Further, the die casting housing after high-temperature water solidification process carries out air-leakage test by water examination.
Preferably, in step B, the infiltration time is 5-6min.
Preferably, in step C, the temperature of high-temperature water solidification process is 90 DEG C.
Compared with traditional integral negative pressure of vacuum Infiltration Technics method, the die casting housing such as housing (internal structure is complicated), housing (filling with diameter by infiltration to limit) that appearance and size is very large efficiently solving housing as carried out part assembling, impregnating adhesive not easy to clean utilize this die casting housing overall vacuum negative pressure Impregnation apparatus before infiltration, just seal all inner die cavity treating compregnate foundry goods housing, so cannot carry out the problem of conventional monolithic infiltration.Further, infiltration qualification rate reaches more than 95%, and impregnant losing quantity is few, and production efficiency is high, and the infiltration of infiltration cost relative overall is very low, and part not easily collides with, scratch damage, and surface remains without impregnating adhesive.
Accompanying drawing explanation
Fig. 1 is overall vacuum negative pressure Impregnation apparatus structural representation of the present invention.
In figure: 1, sealing mechanism, 2, die casting housing, 3, impregnant case, 4, control cabinet, 5, vacuum meter, 6, vavuum pump, 7, air accumulator, 8, oil cylinder.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, body overall vacuum negative pressure Impregnation apparatus of the present invention comprises air accumulator 7, support, be arranged on the impregnant case 3 of frame bottom, cradle top is set and the oil cylinder 8 that is connected with impregnant case 3 of piston end, sealing mechanism 1 between oil cylinder 8 and impregnant case 3, the control cabinet 4 be connected with oil cylinder 8, and the vacuum meter 5 be arranged on control cabinet 4 and vavuum pump 6; Sealing mechanism 1 can will treat that the die cavity of compregnate foundry goods housing 2 inside is completely closed, and vavuum pump 6 is by air accumulator 7 communication seals mechanism 1.
The concrete steps utilizing above-mentioned overall vacuum negative pressure Impregnation apparatus to carry out infiltration operations are as follows.
A, sealing: use sealing mechanism 1 by completely closed for the inside die cavity of die casting housing 2 to be infiltrated.
B, infiltration: utilize oil cylinder 8 to drive impregnant case 3 to rise, until whole die casting housing 2 is all immersed in impregnant, then start vavuum pump 6 pairs of die casting housing 2 inside to bleed, between making inside and outside die casting housing 2, form the pressure differential of-0.095Mpa-0.1Mpa.Impregnant natively has under vacuum conditions and well infiltrates effect, adds the existence of pressure difference, impregnant is revealed in space to die casting housing 2 under the suction of-0.095Mpa-0.1Mpa and infiltrates fast.After impregnant infiltrates fast in the leakage space of die casting housing 2, then die casting housing 2 is taken out from impregnant.Preferably, the infiltration time is 5-6min.
C, solidification: the die casting housing 2 of taking-up is carried out high-temperature water solidification process, impregnant generation curing reaction and then the leakage space blocked on it, thus make pack alloy housing reach the technical requirement of air-tightness and crushing resistance.Preferably, the temperature of high-temperature water solidification process is 90 DEG C.
D, through high-temperature water solidification process after die casting housing 2 by water examination carry out air-leakage test.
Effectively process the die casting housing 2 that cannot carry out conventional monolithic infiltration, as carried out housing, the housing that appearance and size is very large of the housing of part assembling, impregnating adhesive not easy to clean; Infiltration qualification rate can reach more than 95%, and impregnant losing quantity is few, and production efficiency is high, and equipment investment cost is lower, and comprehensive infiltration cost is also low many relative to conventional monolithic infiltration, and part not easily collides with, scratch damage, and surface is without impregnating adhesive residual phenomena.
Claims (4)
1. the infiltration process of a die casting housing overall vacuum negative pressure Impregnation apparatus, it is characterized in that, this die casting housing overall vacuum negative pressure Impregnation apparatus, comprise impregnant case (3), air accumulator (7), also comprise support, impregnant case (3) is arranged on frame bottom, be arranged on cradle top and the oil cylinder (8) that is connected with impregnant case (3) of piston end, be positioned at the sealing mechanism (1) between oil cylinder (8) and impregnant case (3), the control cabinet (4) be connected with oil cylinder (8), and the vacuum meter (5) be arranged on control cabinet (4) and vavuum pump (6), described sealing mechanism (1) can be completely closed by the die cavity that die casting housing (2) is inner, and vavuum pump (6) is by air accumulator (7) communication seals mechanism (1),
Concrete steps are:
A, sealing: use sealing mechanism (1) by completely closed for the inside die cavity of die casting housing (2) to be infiltrated;
B, infiltration: utilize oil cylinder (8) to drive impregnant case (3) to rise, until whole die casting housing (2) is all immersed in impregnant, then start vavuum pump (6) to bleed to die casting housing (2) inside, the pressure differential of-0.095Mpa-0.1Mpa is formed between making inside and outside die casting housing (2), after impregnant infiltrates fast in the leakage space of die casting housing (2), then die casting housing (2) is taken out from impregnant;
C, solidification: the die casting housing (2) taken out is carried out high-temperature water solidification process, impregnant generation curing reaction and then the leakage space blocked on it.
2. the infiltration process of a kind of die casting housing overall vacuum negative pressure Impregnation apparatus according to claim 1, is characterized in that, the described die casting housing (2) after high-temperature water solidification process carries out air-leakage test by water examination.
3. the infiltration process of a kind of die casting housing overall vacuum negative pressure Impregnation apparatus according to claim 1, it is characterized in that, in described step B, the infiltration time is 5-6min.
4. the infiltration process of a kind of die casting housing overall vacuum negative pressure Impregnation apparatus according to claim 1 and 2, is characterized in that, in described step C, the temperature of high-temperature water solidification process is 90 DEG C.
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| CN201410039378.2A CN103785575B (en) | 2014-01-27 | 2014-01-27 | A kind of die casting housing overall vacuum negative pressure Impregnation apparatus and method |
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| CN201410039378.2A CN103785575B (en) | 2014-01-27 | 2014-01-27 | A kind of die casting housing overall vacuum negative pressure Impregnation apparatus and method |
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| CN103785575B true CN103785575B (en) | 2016-04-13 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103977931A (en) * | 2014-05-29 | 2014-08-13 | 泰州市爱国机械有限公司 | Improved gear oil immersion equipment |
| CN104593787A (en) * | 2015-01-12 | 2015-05-06 | 江苏徐航科技有限公司 | Improvement on infiltration process capable of improving surface quality of aluminum alloy die casting |
| CN105903937A (en) * | 2016-05-12 | 2016-08-31 | 安徽纯启动力机械有限公司 | Vacuum pressure infiltration treatment process for aluminum alloy castings |
| CN109530151B (en) * | 2018-12-04 | 2024-04-19 | 合肥江淮铸造有限责任公司 | Repairing system for cast cylinder body of engine |
| CN109433528B (en) * | 2018-12-04 | 2020-11-10 | 中国兵器工业第五九研究所 | Coating method of porous inner surface coating of cylindrical part |
| CN110076044A (en) * | 2019-03-28 | 2019-08-02 | 江苏万力机械股份有限公司 | A kind of crankshaft high pressure oils equipment |
| CN111036889B (en) * | 2019-12-23 | 2021-09-07 | 内蒙古北方重工业集团有限公司 | Process method for strengthening pressure-resistant quality of aluminum alloy |
| CN111995435B (en) * | 2020-09-02 | 2022-05-03 | 中国石油化工股份有限公司 | Method for filling pores in ceramic heat transfer element, and infiltration device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3109585A1 (en) * | 1981-03-13 | 1983-05-19 | Verfahrenstechnik Hübers GmbH, 4290 Bocholt | Process and device for impregnating articles |
| JPH01123664A (en) * | 1987-11-10 | 1989-05-16 | Fuji Xerox Co Ltd | Dip coating method |
| JPH11156286A (en) * | 1997-11-27 | 1999-06-15 | Shindengen Electric Mfg Co Ltd | Deposition method of cylindrical substrate |
| DE10155901A1 (en) * | 2001-11-14 | 2003-05-15 | Mann & Hummel Filter | Process for producing a coating on a hollow fiber |
| CN201949984U (en) * | 2010-11-23 | 2011-08-31 | 上海克兰密封件有限公司 | Reciprocating type vacuum impregnator |
-
2014
- 2014-01-27 CN CN201410039378.2A patent/CN103785575B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3109585A1 (en) * | 1981-03-13 | 1983-05-19 | Verfahrenstechnik Hübers GmbH, 4290 Bocholt | Process and device for impregnating articles |
| JPH01123664A (en) * | 1987-11-10 | 1989-05-16 | Fuji Xerox Co Ltd | Dip coating method |
| JPH11156286A (en) * | 1997-11-27 | 1999-06-15 | Shindengen Electric Mfg Co Ltd | Deposition method of cylindrical substrate |
| DE10155901A1 (en) * | 2001-11-14 | 2003-05-15 | Mann & Hummel Filter | Process for producing a coating on a hollow fiber |
| CN201949984U (en) * | 2010-11-23 | 2011-08-31 | 上海克兰密封件有限公司 | Reciprocating type vacuum impregnator |
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Effective date of registration: 20160921 Address after: 221116 No. 9, Minjiang Road, Second Industrial Park, Xuzhou hi tech Industrial Development Zone, Jiangsu, Xuzhou Patentee after: JIANGSU TONGTAI INDUSTRIAL TECHNOLOGY Co.,Ltd. Address before: 221000 Minjiang Road, hi tech Industrial Development Zone, Xuzhou, Xuzhou, Jiangsu Patentee before: Jiangsu Xuhang Technology Co.,Ltd. |
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Effective date of registration: 20180917 Address after: 221116 No. 7 Minjiang Road, Xuzhou hi tech Industrial Development Zone, Xuzhou, Jiangsu. Patentee after: JIANGSU SHENGHANG PRECISION MANUFACTURING Co.,Ltd. Address before: 221116 No. 9 Minjiang Road, Second Industrial Park, Xuzhou hi tech Industrial Development Zone, Xuzhou, Jiangsu Patentee before: JIANGSU TONGTAI INDUSTRIAL TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20221209 Address after: 221000 South of Qianjiang Road and West of Kunlun Road, New District Street, Xuzhou Hi tech Industrial Development Zone, Xuzhou, Jiangsu Patentee after: Xuzhou Jincheng Precision Manufacturing Co.,Ltd. Address before: 221116 No. 7 Minjiang Road, Xuzhou hi tech Industrial Development Zone, Xuzhou, Jiangsu. Patentee before: JIANGSU SHENGHANG PRECISION MANUFACTURING Co.,Ltd. |