CN101199986B - Fixation method of cylinder head airway core - Google Patents
Fixation method of cylinder head airway core Download PDFInfo
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- CN101199986B CN101199986B CN2006101657459A CN200610165745A CN101199986B CN 101199986 B CN101199986 B CN 101199986B CN 2006101657459 A CN2006101657459 A CN 2006101657459A CN 200610165745 A CN200610165745 A CN 200610165745A CN 101199986 B CN101199986 B CN 101199986B
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Abstract
The invention relates to a fixation method of an air channel core of a cylinder cover, comprising the steps as follows: firstly, screw holes are prefabricated on the relevant position of the air channel core, the base plate core and water jacket sand core frame; secondly, spread glue on the matching surface of the air channel core, the base plate core and water jacket sand core frame; assemble the air channel core into a sand core group; thirdly, make preparatory baking for the sand core group; fourthly, fasten the air channel core. The invention adopts the flow path of hole prefabricating, glued joint, baking, and fastening to realize the fixation of the air channel core; thus not only the problem that the air channel core floats upward in the process of casting is solved thoroughly, but also the height of the log boss of the air guide hole on the cylinder cover does not has ultra tolerance, improving the air channel dimensional precision and the swirl rate performance parameter of inlet channel; thus the inlet channel requirements of the diesel engine of Europe III standard are complied. In addition, the fixation method of the invention does not cause any damage to the surface of the air channel core; the loss of defective product caused by the disqualification of the inlet channel performance is reduced, and the product quality and the production efficiency are improved.
Description
Technical field
The present invention relates to a kind of process of production cylinder head, relate in particular to a kind of fixation method of cylinder head airway core.
Background technology
At present, the cylinder head of domestic casting diesel engine handle airway core fixedly the time, owing to air flue self structure reason, can't fix air flue circle core print, so have to adopt the process of " fixedly air flue side's core print ".The characteristics of this process are: locate the position of airway core by air flue side's core print, circle core print, and cooperate with the core print seat of other core (as jacket core) by square core print and to be fixed air flue side's core print, thus fixing airway core.
Because the technology of " fixedly air flue side's core print " can't be fixed in the short transverse of cylinder cap air intake duct circle core print, in addition, to the square core print of airway core fixedly the time, because core assembly needs, the gap that also has 0.2～0.5mm between the core print seat of side's core print and cooperation with it, cause airway core in casting process, airway core can float at the active force of iron liquid.Like this, air flue will take place to move, phenomenon such as distortion.Even more serious is, cylinder head valve guide hole boss height is overproof greatly, overproof 0.5～1mm usually, and cylinder head valve guide hole boss height directly influences the performance parameter of air intake duct: swirl ratio.
The air flue swirl ratio of Europe three cylinder cover for diesel engine is controlled at usually in ± 0.1, the product that adopts above-mentioned traditional " fixedly air flue side's core print " process to produce, its air intake duct swirl ratio is overproof usually at ± 0.1～0.25mm, the needs of Europe three diesel engine productions can't be satisfied, but also a large amount of losses due to spoiled work can be caused air flue.
Summary of the invention
The purpose of this invention is to provide a kind of fixation method of cylinder head airway core, process at prior art " fixedly air flue side's core print " can't satisfy the quality needs and can cause technological deficiencies such as a large amount of losses due to spoiled work, effectively solve airway core come-up problem, and improve the uniformity of air flue.
To achieve these goals, the invention provides a kind of fixation method of cylinder head airway core, comprise step:
Wherein, step 10 is specially:
Step 11, on airway core side's core print and airway core circle core print prefabricated screw hole;
Step 12, on the core of chassis prefabricated screw hole;
Step 13, on the sand core of water jacket frame prefabricated screw hole.
Wherein, step 20 is specially:
Step 21, on the mating surface of chassis core and airway core circle core print gluing;
Step 22, on the mating surface of sand core of water jacket frame and airway core side's core print gluing;
Step 23, airway core is assembled into the core group;
Behind step 24, the installation airway core, check airway core valve boss height, guarantee that airway core is in place.
Wherein, step 30 is specially:
Step 31, described core group is put into baking oven;
Step 32,80～160 ℃ of baking temperatures, stoving time 60～120min are set;
Step 33, prebake conditions are solidified fully up to glue.
Wherein, step 40 is specially:
Step 41, the edge-on core group of crossing through prebake conditions, from the bottom surface of chassis core at the air flue circle core print screw hole screw of screwing on, fastening air flue circle core print;
Step 42, horizontal core group, the screw of screwing at core print screw hole place, air flue side, fastening air flue side core print.
In technique scheme, the diameter of described screw hole is 1.5～9.5mm, and described screw is that diameter is countersunk head wood screw or the countersunk head tapping screw of 2～10mm.
The present invention proposes a kind of fixation method of cylinder head airway core, the technical scheme that adopts airway core to be completely fixed has broken through the process of traditional " fixedly air flue side's core print ".The present invention has realized the fixing of airway core by pre-manufactured hole-splicing-baking-fastening flow process, not only can thoroughly solve the come-up problem of airway core in casting process, and cylinder head valve guide hole boss height can not produce overproof, improve the swirl ratio performance parameter of airway dimension precision and air intake duct, thereby satisfy of the requirement of Europe three diesel engines air intake duct.Fixing means of the present invention in addition also can not cause any damage to the airway core surface, reduces the loss due to spoiled work that causes because of inlet characteristic is defective, has improved product quality and production efficiency.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is a fixation method of cylinder head airway core flow chart of the present invention;
Fig. 2 is the structural representation of airway core;
Fig. 3 be among Fig. 2 A-A to profile.
The specific embodiment
Fig. 1 is a fixation method of cylinder head airway core flow chart of the present invention, comprises step:
Technique scheme of the present invention has broken through the process of traditional " fixedly air flue side's core print ", has proposed the technical scheme that a kind of airway core is completely fixed.Technical solution of the present invention has realized the fixing of airway core by pre-manufactured hole-splicing-baking-fastening flow process, not only can thoroughly solve the come-up problem of airway core in casting process, and cylinder head valve guide hole boss height can not produce overproofly, improves the swirl ratio performance parameter of airway dimension precision and air intake duct.Fixing means of the present invention in addition also can not cause any damage to the airway core surface, can not cause waste product, has improved product quality and production efficiency.
In technique scheme of the present invention, step 10 is specially:
Step 11, on airway core side's core print and airway core circle core print prefabricated screw hole;
Step 12, on the core of chassis prefabricated screw hole;
Step 13, on the sand core of water jacket frame prefabricated screw hole.
Step 21, on the mating surface of chassis core and airway core circle core print gluing;
Step 22, on the mating surface of sand core of water jacket frame and airway core side's core print gluing;
Step 23, airway core is assembled into the core group;
Behind step 24, the installation airway core, check airway core valve boss height, guarantee that airway core is in place.
Step 31, described core group is put into baking oven;
Step 32,80～160 ℃ of baking temperatures, stoving time 60～120min are set;
Step 33, prebake conditions are solidified fully up to glue.
Step 41, the edge-on core group of crossing through prebake conditions, from the bottom surface of chassis core at the air flue circle core print screw hole screw of screwing on, fastening air flue circle core print;
Step 42, horizontal core group, the screw of screwing at core print screw hole place, air flue side, fastening air flue side core print.
Fig. 2 is the structural representation of airway core, Fig. 3 be among Fig. 2 A-A to profile.Now further specify technical scheme of the present invention in conjunction with Fig. 2, Fig. 3.Fixation method of cylinder head airway core of the present invention comprises four parts: (1), prefabricated screw hole; (2), assembling airway core; (3), core group prebake conditions; (4), screwing, be specially:
At first, the square core print at airway core 4 precasts screw hole with justifying on the core print; On chassis core 1, precast screw hole; On sand core of water jacket frame 2, precast screw hole; Secondly, before dress airway core 4, on the mating surface of the square core print on the airway core 4, circle core print and chassis core 1/ sand core of water jacket frame 2 core print seats, coat a little HA Instant cement, airway core is assembled into the core group; After assembling airway core 4, check airway core valve boss height, to guarantee that airway core 4 installs to the position; Obtain the core group through after the above-mentioned operation, the core group is put into baking oven carry out prebake conditions, 80～160 ℃ of baking temperatures, stoving time 60～120min solidifies fully to guarantee the HA Instant cement; At last, the edge-on core group of crossing through prebake conditions, from the bottom surface of chassis core 1 at the airway core circle core print screw hole screw 3 of screwing on, the round core print of fastening airway core 4; Horizontal core group, the screw 5 of screwing at the square core print screw hole place of airway core 4, the square core print of fastening airway core 4.In technique scheme, the diameter 1.5～9.5mm of screw hole.Screw 3 and screw 5 can be the countersunk head wood screw, also can be the countersunk head tapping screw, and the diameter of screw is 2～10mm, also can determine its size by prefabricated screw hole.
It should be noted that at last: above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (8)
1. fixation method of cylinder head airway core is characterized in that comprising step:
Step 10, the prefabricated screw hole in relevant position on airway core, chassis core and sand core of water jacket frame;
Step 20, on the mating surface of airway core and chassis core and sand core of water jacket frame gluing, airway core is assembled into the core group;
Step 30, described core group is carried out prebake conditions;
Step 40, fastening airway core.
2. fixation method of cylinder head airway core according to claim 1 is characterized in that described step 10 is specially:
Step 11, on airway core side's core print and airway core circle core print prefabricated screw hole;
Step 12, on the core of chassis prefabricated screw hole;
Step 13, on the sand core of water jacket frame prefabricated screw hole.
3. fixation method of cylinder head airway core according to claim 1 is characterized in that described step 20 is specially:
Step 21, on the mating surface of chassis core and airway core circle core print gluing;
Step 22, on the mating surface of sand core of water jacket frame and airway core side's core print gluing;
Step 23, airway core is assembled into the core group;
Behind step 24, the installation airway core, check airway core valve boss height, guarantee that airway core is in place.
4. fixation method of cylinder head airway core according to claim 1 is characterized in that described step 30 is specially:
Step 31, described core group is put into baking oven;
Step 32,80～160 ℃ of baking temperatures, stoving time 60～120min are set;
Step 33, prebake conditions are solidified fully up to glue.
5. fixation method of cylinder head airway core according to claim 1 is characterized in that described step 40 is specially:
Step 41, the edge-on core group of crossing through prebake conditions, from the bottom surface of chassis core at the air flue circle core print screw hole screw of screwing on, fastening air flue circle core print;
Step 42, horizontal core group, the screw of screwing at core print screw hole place, air flue side, fastening air flue side core print.
6. according to claim 1,2 or 5 described fixation method of cylinder head airway core, the diameter that it is characterized in that described screw hole is 1.5～9.5mm.
7. fixation method of cylinder head airway core according to claim 5 is characterized in that screw described in the described step 40 is countersunk head wood screw or countersunk head tapping screw.
8. according to claim 5 or 7 described fixation method of cylinder head airway core, the diameter that it is characterized in that described screw is 2～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101657459A CN101199986B (en) | 2006-12-15 | 2006-12-15 | Fixation method of cylinder head airway core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101657459A CN101199986B (en) | 2006-12-15 | 2006-12-15 | Fixation method of cylinder head airway core |
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| Publication Number | Publication Date |
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| CN101199986A CN101199986A (en) | 2008-06-18 |
| CN101199986B true CN101199986B (en) | 2010-04-14 |
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| CN2006101657459A Active CN101199986B (en) | 2006-12-15 | 2006-12-15 | Fixation method of cylinder head airway core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106040986A (en) * | 2016-07-15 | 2016-10-26 | 杭州汽轮铸锻有限公司 | Stable and simple mold core fixing method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559477A (en) * | 2009-05-15 | 2009-10-21 | 中国第一汽车集团公司 | Method for positioning large core |
| CN103480800B (en) * | 2013-08-30 | 2015-11-25 | 广西玉柴机器股份有限公司 | Cylinder head sand core group and assemble method |
| CN103658543B (en) * | 2013-08-30 | 2015-10-28 | 广西玉柴机器股份有限公司 | Cylinder head sand core assemble method |
| CN106650152B (en) * | 2016-12-30 | 2019-09-13 | 北京理工大学 | A kind of straight air flue design method of internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5119881A (en) * | 1990-03-07 | 1992-06-09 | Navistar International Transportation Corp. | Cylinder head casting core assembly and method |
| US5333581A (en) * | 1990-03-07 | 1994-08-02 | Navistar International Transportation Corp. | Cylinder head casting |
| US7100560B2 (en) * | 2003-10-20 | 2006-09-05 | Nissan Motor Co., Ltd. | Partition plate for intake port, intake port molding sand core and cylinder head |
-
2006
- 2006-12-15 CN CN2006101657459A patent/CN101199986B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5119881A (en) * | 1990-03-07 | 1992-06-09 | Navistar International Transportation Corp. | Cylinder head casting core assembly and method |
| US5333581A (en) * | 1990-03-07 | 1994-08-02 | Navistar International Transportation Corp. | Cylinder head casting |
| US7100560B2 (en) * | 2003-10-20 | 2006-09-05 | Nissan Motor Co., Ltd. | Partition plate for intake port, intake port molding sand core and cylinder head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106040986A (en) * | 2016-07-15 | 2016-10-26 | 杭州汽轮铸锻有限公司 | Stable and simple mold core fixing method |
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| CN101199986A (en) | 2008-06-18 |
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