CN202348460U - Sand-casting engine cylinder cover with low rejection ratio - Google Patents
Sand-casting engine cylinder cover with low rejection ratio Download PDFInfo
- Publication number
- CN202348460U CN202348460U CN2011203225846U CN201120322584U CN202348460U CN 202348460 U CN202348460 U CN 202348460U CN 2011203225846 U CN2011203225846 U CN 2011203225846U CN 201120322584 U CN201120322584 U CN 201120322584U CN 202348460 U CN202348460 U CN 202348460U
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- hole
- diameter
- sand
- water jacket
- cylinder cover
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Provided is a sand-casting engine cylinder cover with the low rejection ratio. A group of circular truncated cones connected with bolt holes are arranged the exhaust side of an oil pool face of the cylinder cover, and exhaust process holes with the diameter size of phi 1 are respectively arranged on the circular truncated cones connected with a second bolt hole, a third bolt hole and a fourth bolt hole. By changing the position, the number and the size of the exhaust process holes on the oil pool face of the cylinder cover, the exhaust effect of a water jacket sand core of the cylinder cover is improved, and air hole casting defects are reduced. Simultaneously, the problem of black rust in process hole processing is solved. By increasing the size of process holes on the vertical face of the air inlet side, the strength of the sand core is improved, the problem that the sand core breaks is solved, the rejection ratio of the cylinder cover is reduced from more than 21% to about 6%, the capacity of subsequent processes is promoted, and the repair rate is reduced.
Description
Technical field
The utility model relates to a kind of engine cylinder cap, is particularly useful for the integrated type engine cylinder cap of aluminium alloy sand mould casting, belongs to technical field of internal combustion engines.
Background technique
The engine cylinder cap blank of aluminium alloy sand mould casting; Inside is provided with complex-shaped water channel, oil duct; Intake duct, air outlet flue, preheating consent, oil injector hole etc., these positions are important component parts of engines distribution, cooling, system such as lubricated, and strict status requirement is arranged between them; Therefore also very high to the requirement of castability, do not allow to occur casting defects such as shrinkage porosite, pore.Gas hole defect is a difficult problem of restriction cylinder cap rough-cast quality for a long time.And the mold ingate position, shape, the size that are complementary with air cylinder head structure, the generation that is provided with etc. all pore of bypass channel and air outlet flue has significant effects, so the optimal design of air cylinder head structure is the key factor of decision cast blank up-to-standard rate.
For a long time, because exhaust port position, size, the quantity of cylinder head blank end face are improper, the gas that produces in the casting process can not normally be discharged, and causes blank through after the machining, and the seat surface place has pore often and occurs, and cylinder head is scrapped; Little because of exhaust port machining allowance simultaneously, the position degree of auxiliary hole has deviation slightly during casting, and the processing casting skin just appears in follow-up machining processes, causes cylinder cap to be scrapped; In addition, because the design of air inlet face sand core of water jacket positioning hole diameter is too small, be prone to cause the sand core of water jacket fracture, the core that ruptures during casting floats on the aluminium liquid, causes the wall thickness between water jacket and the heater plug thin excessively, and heater plug leaks when serious, causes cylinder cap to be scrapped.
The model utility content
The purpose of the utility model is the disadvantage to the existence of available engine air cylinder head structure; Provide a kind of reject rate low sand casting process engine cylinder cap; It increases the exhaust effect of cylinder head jacket core through reasonable structural design, reduces the casting defect that pore causes; Solve the core breakage problem through increasing sand core strength.
The said problem of the utility model realizes with following technical proposals:
The sand casting process engine cylinder cap that a kind of reject rate is low; Its specialization is: at cylinder head oil sump face (upper-end surface) exhaust side one group of round platform that joins with bolt hole is set, placement diameter is of a size of the exhaust air technique hole of Φ 1 on the round platform that joins with second and third, four bolts hole respectively.
The sand casting process engine cylinder cap that above-mentioned reject rate is low, the sand core of water jacket that is provided with on the facade before air inlet side location semicircle auxiliary hole diameter D be greater than 14 millimeters, the bowl type consent diameter of phi 2 corresponding with this auxiliary hole also with its coupling; Distance L between heater plug mounting hole and the water jacket is greater than 4 millimeters.
The sand casting process engine cylinder cap that above-mentioned reject rate is low, said exhaust air technique hole casting bottom diameter Φ 1=9 millimeter, processing back auxiliary hole diameter is 12 millimeters; Said sand core of water jacket location semicircle auxiliary hole diameter D=18 millimeter, the bowl type consent diameter of phi 2=21 millimeter corresponding, distance L=6 between said heater plug mounting hole and the water jacket millimeter with this auxiliary hole.
The utility model improves the available engine air cylinder head structure, improves the exhaust effect of cylinder head jacket core through position, quantity, the size in exhaust air technique hole on the change cylinder head oil sump face, reduces the casting defect that pore brings; Machining allowance because of auxiliary hole increases simultaneously, has solved the problem of auxiliary hole processing casting skin; Through strengthening the size of air inlet side elevation auxiliary hole, increased sand core strength, solved the variety of issue that the core fracture brings, the cylinder head reject rate has promoted the production capacity of subsequent handling by original being reduced to more than 21% about 6%, has reduced repair rate.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is the plan view of the utility model;
Fig. 2 is the plan view of the utility model;
Fig. 3 is an A-A sectional drawing among Fig. 2;
Fig. 4 is the left view of the utility model;
Fig. 5 is the right elevation of the utility model.
Each label is among the figure: 1, round platform, 2, the exhaust air technique hole, 3, bolt hole, 4, the semicircle auxiliary hole, 5, bowl type consent, 6, the preheating consent, 7, water jacket, 8, the front-end process hole, 9, the backend process hole.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3; Internal placement has water jacket, intake duct, air outlet flue etc. under the engine cylinder cap oil sump face; When cast each position core be heated and escaping gas, utilize the negative pressure ventilation system to extract out near the core escaping gas of front-end face by 8 places, front-end process hole, utilize the negative pressure ventilation system to extract out near the core escaping gas of ear end face by 9 places, backend process hole; The gas that the intermediate portion core produces is discharged by the exhaust air technique hole 2 at the position that mediates.The utility model improves position, quantity, the size in cylinder head oil sump face exhaust air technique hole; Embodiment is: one, the bolt hole place on cylinder head oil sump face is provided with one group of round platform 1; Round platform 1 joins with bolt hole 3; At second and third, arranged exhaust air technique hole 2 near four bolts hole the round platform, promptly comparing with present engine cylinder cap has increased an exhaust air technique hole respectively; Two, oil sump face auxiliary hole casting bottom diameter is increased to 9 millimeters by 7 millimeters, processing back auxiliary hole diameter becomes 12 millimeters by 8 millimeters, and promptly monolateral machining allowance becomes 1.5 millimeters by 0.5 millimeter; Both improve the air displacement in exhaust air technique hole, promoted the exhaust effect of entire cylinder head sand mold, reduced the appearance of pore, solved the auxiliary hole processing casting skin problem that is caused because of machining allowance is not enough again.Three, exhaust air technique hole arrangement scope is more even extensively, has shortened the exhaust pathway that receives thermogenetic gas in each sand core of water jacket, intake duct core, the air outlet flue core, make emergent gas can be nearby, discharge rapidly, avoid forming gas hole defect.
Referring to Fig. 2, Fig. 3, below cylinder head air inlet side elevation intake duct, be furnished with 3 semi-circle-shaped technological holes 4; Be used for locating water jacket cantilever core, positioning principle is: sand core of water jacket links together with location semi-circle-shaped technological hole 4 cores, and the joint diameter is this positioning process bore dia; Because this joint with respect to sand core of water jacket, forms overhang, core easy-rupturing in casting cycle; Sand core of water jacket can't be located, under the floating function of aluminium liquid, float on the core of fracture; Cause that wall thickness diminishes between this sand core of water jacket and the preheating consent 6 adjacent with it, produce seepy question.The utility model is in order to improve the intensity of sand core of water jacket and positioning process hole core connection part; The semicircle auxiliary hole 4 diameter D of air inlet side elevation are 18 millimeters during special will the casting; It is 18 millimeters that the diameter of corresponding sand core of water jacket at this moment and positioning process hole core joint also increases; Thereby make overhang place intensity enhancing, effectively prevent the sand core of water jacket fracture.Handle because semicircle auxiliary hole 4 need carry out bowl type plug shutoff before installation, outer bowl type consent 5 diameter of phi 2 of corresponding auxiliary hole also change to 21 millimeters by 16 millimeters.The utility model is enough in order to ensure wall thickness between preheating consent 6 and the water jacket 7, and the wall thickness L between preheating consent 6 and the water jacket is improved to 6 millimeters by original 4 millimeters, leaks to prevent heater plug hole 6.
Claims (4)
1. sand casting process engine cylinder cap that reject rate is low; It is characterized in that; At cylinder head oil sump face exhaust side one group of round platform that joins with bolt hole (1) is set, goes up the exhaust air technique hole (2) that placement diameter is of a size of Φ 1 at the round platform (1) that joins with second and third, four bolts hole (3) respectively.
2. the sand casting process engine cylinder cap that reject rate according to claim 1 is low; It is characterized in that; Sand core of water jacket location semicircle auxiliary hole (4) the diameter D size that is provided with on the facade before the air inlet side is greater than 14 millimeters, bowl type consent (5) diameter of phi 2 corresponding with said auxiliary hole also with its coupling.
3. the sand casting process engine cylinder cap that reject rate according to claim 2 is low is characterized in that, the distance L between heater plug mounting hole (6) and the water jacket (7) is greater than 4 millimeters.
4. the sand casting process engine cylinder cap that reject rate according to claim 3 is low; It is characterized in that; Said exhaust air technique hole (2) casting bottom diameter Φ 1=9 millimeter, processing back auxiliary hole diameter is 12 millimeters, said sand core of water jacket location semicircle auxiliary hole (4) diameter D=18 millimeter; Bowl type consent (5) the diameter of phi 2=21 millimeter corresponding with this auxiliary hole, distance L=6 between said heater plug mounting hole (6) and the water jacket (7) millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203225846U CN202348460U (en) | 2011-08-31 | 2011-08-31 | Sand-casting engine cylinder cover with low rejection ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203225846U CN202348460U (en) | 2011-08-31 | 2011-08-31 | Sand-casting engine cylinder cover with low rejection ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202348460U true CN202348460U (en) | 2012-07-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203225846U Expired - Fee Related CN202348460U (en) | 2011-08-31 | 2011-08-31 | Sand-casting engine cylinder cover with low rejection ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202348460U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199312A (en) * | 2017-07-13 | 2017-09-26 | 广西玉柴机器股份有限公司 | The quick cast and manufacturing process of integrated cylinder cap |
| CN108421956A (en) * | 2018-04-11 | 2018-08-21 | 安徽江淮汽车集团股份有限公司 | Engine cylinder cover casting mould and cylinder cap |
| CN108678868A (en) * | 2018-08-01 | 2018-10-19 | 重庆红旗缸盖制造有限公司 | A kind of head exhaust hole blahk structure |
-
2011
- 2011-08-31 CN CN2011203225846U patent/CN202348460U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107199312A (en) * | 2017-07-13 | 2017-09-26 | 广西玉柴机器股份有限公司 | The quick cast and manufacturing process of integrated cylinder cap |
| CN107199312B (en) * | 2017-07-13 | 2023-05-09 | 广西玉柴机器股份有限公司 | Rapid casting and forming method of integrated cylinder cover |
| CN108421956A (en) * | 2018-04-11 | 2018-08-21 | 安徽江淮汽车集团股份有限公司 | Engine cylinder cover casting mould and cylinder cap |
| CN108678868A (en) * | 2018-08-01 | 2018-10-19 | 重庆红旗缸盖制造有限公司 | A kind of head exhaust hole blahk structure |
| CN108678868B (en) * | 2018-08-01 | 2024-01-19 | 重庆红旗缸盖制造有限公司 | Cylinder cap exhaust hole blank structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20200831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |