CN101468383B - Method for casting cylinder cover of multicylinder one-cover engine - Google Patents
Method for casting cylinder cover of multicylinder one-cover engine Download PDFInfo
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- CN101468383B CN101468383B CN2007101606470A CN200710160647A CN101468383B CN 101468383 B CN101468383 B CN 101468383B CN 2007101606470 A CN2007101606470 A CN 2007101606470A CN 200710160647 A CN200710160647 A CN 200710160647A CN 101468383 B CN101468383 B CN 101468383B
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Abstract
The invention discloses a method for casting a cylinder head of a multi-cylinder single-cover engine, which adopts a reverse deformation amount casting method and comprises the design of shape reverse deformation amount of a casting mould and a mounting structure between sand cores, wherein the reverse deformation amount of the casting mould adopts the design that the part forming the shapes of the bottom and the top of a product is designed into V-shaped, and the initial point of the design of the V-shaped reverse deformation amount takes the central point of longitudinal length of the mould as the highest point, and the design of the V-shaped reverse deformation amount takes a slope surface formed on edges at two initial ends of the longitudinal length of the mould as the lowest final point. The method for casting the cylinder head of the engine adopts a modification method of the reverse deformation amount at the proper position according to the structure of the shape of the cylinder head when designing the mould. The casting process method adopts the structure of reverse deformation shape of the mould to effectively reduce the reverse deformation of a casting, and ensures the accuracy of the shape of the casting, in particular the accuracy of the shape of an air intake and discharge passage at key parts, thereby ensuring the stability of performance parameters of the air passage. The manufacturing cost of the mould and the production cost of the casting do not change.
Description
Technical field
The present invention relates to a kind of method for casting cylinder cover of multicylinder one-cover engine, especially four valve cover of multicylinder one process of casting cylinder head of multiple cylinder diesel engine.
Background technology
Engine cylinder cover is the important composition parts of engine, and particularly for Diesel engine, the four-valve cylinder head foundry goods is the most difficult manufacturing.This foundry goods Aspect Ratio great disparity, the inner chamber wall thickness is thinner, and the bottom surface is thick even with the thin formation of end face wall unevenness, the water cavity complex structure, a lot of places are linked up by very thin sand, and core is yielding, the easy flexural deformation of the foundry goods of producing, allowance is inhomogeneous.When for example designing allowance and being 4mm, the foundry goods allowance that casts out is bigger 6～7mm, less less than 1mm.It is big to cast out the foundry goods geomery deviation of coming, and entering and exhaust channel boss height has differed about 2mm, the correction of need on the air flue test stand, polishing, and production efficiency is low.The complete machine uniformity is poor, processing during foundry goods the cutter loss many, manufacturing cost increases.
In the literary composition of " modern casting " the 4th phase P54～56 " the employing reversible deformation improves 6110 diesel engine cylinder cap duct position precision " in 2005, adopt and carry the mould structure that 3,4 cylinders (centre) sink on correcting wedge or relative 2,5 cylinder positions, 1,6 cylinders (two ends), to proofread and correct the deflection that casting produces.A kind of method before it has reduced the reliability of location because the cooperation between each core encounters difficulties, and has increased the morphotropism of core, has increased the possibility of product others faults of construction.A kind of method in back may increase the defective of rotation.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of anti-deformation casting method of cylinder cover of multicylinder one-cover engine, reducing the casting deformation amount, thereby guaranteed the quality of foundry goods, reduce manufacturing cost.
Cover of multicylinder one engine cylinder cover casting method of the present invention adopts the anti-deformation casting method, comprises the design of casting mould shape reverse deflection and the mounting structure between the core.The anti-deformation of casting mould is designed to mould is formed the product bottom becomes wide mouthful of " V " shape with the partial design of top shape shape, the bottom surface is protruding in order to be, the end face concave shape, the starting point of wide mouthful " V " shape anti-deformation design is that the central point with the mould longitudinal length is a peak, the slope that forms to the initial edges at two ends of mould longitudinal length is minimum terminal point design, and being higher than initial edges at two ends height with the central point projection is 1～3mm, the molding allowance that this value designs for reversible deformation.
Cover of multicylinder one engine cylinder cover casting method of the present invention adopts in the anti-deformation casting method, and the slope that " V " shape structure of wide mouthful of " V " shape anti-deformation forms is faced directly for facing directly or arcwall face, being preferably.
In the casting technique of cover of multicylinder one engine cylinder cover anti-deformation of the present invention, should accurately cooperate between the core and install and core assembly.Core comprises the end face core from top to bottom successively, upper water sleeve core, lower water jacket core, air flue core and chassis core.The installation of core is for convenience guaranteed to cooperate accurately between the core, prevents core dislocation and distortion, and the core core print of working in coordination partly adopts the plane to cooperate, and preferably adopts big plane to cooperate, and other parts adopt wide mouthful of " V " shape to cooperate.In order to make the core location more accurate, between core that cooperatively interacts and core, use tenon location, 8～10 location, tenon is distributed on the core core print.
Anti-deformation casting technique of the present invention has the following advantages:
(1) allowance is even, is controlled at 3.5～4.5mm, foundry goods shape accuracy height, and percent defective reduces.
(2), can adopt local reversible deformation casting technique for the big position of local deformation.
(3) entering and exhaust channel boss height differ be controlled at ± the 0.035mm scope within, be reduced in the polishing correction of air flue boss height on the air flue test stand, reduced the deviation of entering and exhaust channel parameter consistency, improved air flue parameter accuracy, reduced manufacturing cost.
(4) foundry goods allowance is even, and the process tool loss reduces, and production cost reduces.
(5) core accurate positioning guarantees that foundry goods geomery deviation is little.
(6) the Mold Making cost is constant, and casting core assembly operation and time are constant.
(7) in the mould design, use the UG three-dimensional software and carry out whole three-dimensional casting Technology Design and core assembling, guarantee that mould is accurate.
Description of drawings
Fig. 1 is a four-valve cylinder head cast casting technology anti-deformation schematic diagram of the present invention.
Fig. 2 is a four-valve cylinder head end face core box shape schematic perspective view of the present invention.
Fig. 3 is a four-valve cylinder head upper water sleeve core box shape schematic perspective view of the present invention.
Fig. 4 is the location schematic perspective view of all cores of four-valve cylinder head of the present invention.
Fig. 5 is that four-valve cylinder head core of the present invention assembles total three-dimensional view.
Fig. 6 is the cylinder head casting schematic appearance that adopts after the present invention casts.
Wherein: the 1-location structure; 2-double dot dash line scope internal strain zone; The starting point of 3-reversible deformation; The terminal point of 4-reversible deformation; 5-core core print; 6-core box die joint; 7-inner circle area " V " shape cooperates; 8-end face core and upper water sleeve core location tenon; The location tenon of 9-upper water sleeve core and lower water jacket core; The core print of the outer collar region of 10-cooperates the big plane of employing to cooperate; The location tenon of 11-lower water jacket core and chassis core; 12-end face core; 13-upper water sleeve core; 14-lower water jacket core; 15-chassis core; 16-air flue core; The foundry goods outline line that 17-casts out; 18-shadow region " V " distortion revisal amount; 19-mould cast outline line.
The specific embodiment
In the cover of multicylinder one engine cylinder cover anti-deformation mould design of the present invention, the shape of each core is wide mouthful of " V " shape according to casting deformation, the relative position of determining core place Kuan Kou " V " shape position is made the core shape of wide mouthful of " V " shape of respective direction, and wide mouthful of " V " shape up and down of every cover core box determined according to wide mouthful of " V " shape of its contiguous core that cooperates with it.Be that the bottom surface is protruding, the end face concave shape, the starting point of wide mouthful " V " shape anti-deformation design is that the central point with the mould longitudinal length is a peak, forming slope at a certain angle to the initial edges at two ends of mould longitudinal length is minimum terminal point design, and being higher than initial edges at two ends height with the central point projection is 1～3mm, and this value is the molding allowance of reversible deformation design.
Further specify anti-deformation casting technique of the present invention below in conjunction with accompanying drawing.
The anti-deformation casting method of cover of multicylinder one engine cylinder cover of the present invention comprises the design of mould core shape reverse deflection and the mounting structure between the core.The anti-deformation of casting mould is designed to mould is formed the product bottom becomes wide mouthful of " V " shape with the partial design of top shape deformed shape, see double dot dash line scope internal strain zone 2 among Fig. 2, be promptly that the bottom surface is protruding, end face concavity attitude, the reversible deformation starting point 3 of wide mouthful " V " shape anti-deformation design is that the central point with the mould longitudinal length is a peak, forming slope at a certain angle to the initial edges at two ends of mould longitudinal length is minimum terminal point 4 designs, and being higher than initial edges at two ends height with the central point projection is 1～3mm, and this value is the molding allowance of reversible deformation design.
In the cover of multicylinder one engine cylinder cover anti-deformation mould design of the present invention, the shape of each core is wide mouthful of " V " shape according to casting deformation, the relative position of determining core place Kuan Kou " V " shape position is made the core shape of wide mouthful of " V " shape of respective direction, and wide mouthful of " V " shape up and down of every cover core box determined according to wide mouthful of " V " shape of its contiguous core that cooperates with it.Be that the bottom surface is protruding, end face concavity attitude, the starting point of wide mouthful " V " shape anti-deformation design is that the central point with the mould longitudinal length is a peak, forming slope at a certain angle to the initial edges at two ends of mould longitudinal length is minimum terminal point design, and being higher than initial edges at two ends height with the central point projection is 1～3mm, and this value is the molding allowance of reversible deformation design.
In the casting technique of cover of multicylinder one engine cylinder cover anti-deformation of the present invention, need between the core accurately to cooperate and install and core assembly.Cover of multicylinder one engine cylinder cover anti-deformation mould core of the present invention comprises end face core 12 from top to bottom successively, upper water sleeve core 13, lower water jacket core 14, air flue core 16, chassis core 15, location structure 1 is set between each core, and location structure specifically comprises the location tenon 11 etc. of location tenon 9, lower water jacket core and the chassis core of end face core and upper water sleeve core location tenon 8, upper water sleeve core and lower water jacket core.Core box somatotype between the core and 6 zones are that core inner circle area " V " shape cooperates 7.The installation of core for convenience, guarantee to cooperate accurately between the core, prevent core dislocation and distortion, core core print 5 parts of working in coordination adopt the plane to cooperate, the core print in preferred foreign country zone cooperates the big plane of employing to cooperate 10, and other parts adopt wide mouthful of " V " shape to cooperate.In order to make the core location more accurate, between core and core, increase by 8～10 location tenons and locate, tenon is distributed on the core core print.Other content all can be determined by this area general knowledge in the casting technique of the present invention.
The foundry goods outline line 17 that anti-deformation casting technique of the present invention casts out is because the anti-deformation design of mould cast outline line 19, obtained foundry goods shadow region " V " distortion revisal amount 18, make the final casting product improve many-sided quality, overcome the cover of multicylinder one engine cylinder cover because the bottom surface is thick and the thin formation of end face wall unevenness is even, the flexible metaboly of foundry goods that factors such as water cavity complex structure are brought.
Claims (5)
1. method for casting cylinder cover of multicylinder one-cover engine, adopt the anti-deformation casting method, it is characterized in that: comprise the design of casting mould shape reverse deflection and the mounting structure between the core, the anti-deformation of casting mould is designed to mould is formed the product bottom becomes wide mouthful of " V " shape with the partial design of top shape shape, protruding for being the bottom surface, the end face concave shape, the starting point of wide mouthful " V " shape anti-deformation design is that the central point with the mould longitudinal length is a peak, the slope that forms to the initial edges at two ends of mould longitudinal length is minimum terminal point design, and being higher than initial edges at two ends height with the central point projection is 1～3mm, the molding allowance that this value designs for reversible deformation.
2. according to the described casting method of claim 1, it is characterized in that: the slope that " V " shape structure of wide mouthful of " V " shape anti-deformation forms is for facing directly or arcwall face.
3. according to the described casting method of claim 1, it is characterized in that: core comprises the end face core from top to bottom successively, upper water sleeve core, lower water jacket core, air flue core and chassis core.
4. according to the described casting method of claim 3, it is characterized in that: the core core print of working in coordination partly adopts the plane to cooperate, and other parts adopt wide mouthful of " V " shape to cooperate.
5. according to the described casting method of claim 3, it is characterized in that: use tenon location, 8～10 location between core that cooperatively interacts and core, tenon is distributed on the core core print.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101606470A CN101468383B (en) | 2007-12-26 | 2007-12-26 | Method for casting cylinder cover of multicylinder one-cover engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101606470A CN101468383B (en) | 2007-12-26 | 2007-12-26 | Method for casting cylinder cover of multicylinder one-cover engine |
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| Publication Number | Publication Date |
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| CN101468383A CN101468383A (en) | 2009-07-01 |
| CN101468383B true CN101468383B (en) | 2011-02-16 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905292A (en) * | 2010-08-18 | 2010-12-08 | 中核苏阀横店机械有限公司 | Casting sand mould box of cylindrical casting |
| CN102836965B (en) * | 2012-08-03 | 2014-07-23 | 鞍钢重型机械有限责任公司 | Casting method for guaranteeing wall thickness precision of blast furnace hot-blast stove pillar |
| CN104209468B (en) * | 2014-08-21 | 2016-08-24 | 广西玉柴机器股份有限公司 | Water hole core tenon and mounting process method thereof on cylinder head lower water jacket |
| CN106077515A (en) * | 2016-08-03 | 2016-11-09 | 滁州兴达机电有限公司 | A kind of method for casting cylinder cover of multicylinder one-cover engine |
| CN109290522A (en) * | 2018-10-23 | 2019-02-01 | 合肥江淮铸造有限责任公司 | A kind of back oil road sand core of engine cylinder body casting |
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| KR20020032130A (en) * | 2000-10-25 | 2002-05-03 | 이종훈 | fabrication method of zircon mold for vacum accurate molding and the mold |
| CN1751824A (en) * | 2004-09-21 | 2006-03-29 | 上海重型机器冶铸厂 | Method for casting rear stern shaft rack |
| CN1990134A (en) * | 2005-12-30 | 2007-07-04 | 广西玉柴机器股份有限公司 | Diesel engine four-valve cylinder head gravity casting die and casting method thereof |
| CN101066557A (en) * | 2007-06-01 | 2007-11-07 | 镇江中船设备有限公司 | Process of casting cylinder head of diesel engine |
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2007
- 2007-12-26 CN CN2007101606470A patent/CN101468383B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020032130A (en) * | 2000-10-25 | 2002-05-03 | 이종훈 | fabrication method of zircon mold for vacum accurate molding and the mold |
| CN1751824A (en) * | 2004-09-21 | 2006-03-29 | 上海重型机器冶铸厂 | Method for casting rear stern shaft rack |
| CN1990134A (en) * | 2005-12-30 | 2007-07-04 | 广西玉柴机器股份有限公司 | Diesel engine four-valve cylinder head gravity casting die and casting method thereof |
| CN101066557A (en) * | 2007-06-01 | 2007-11-07 | 镇江中船设备有限公司 | Process of casting cylinder head of diesel engine |
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