CN103264144B - A kind of special loam core for the multichannel hydraulic control valve body for manufacturing heavy digger - Google Patents
A kind of special loam core for the multichannel hydraulic control valve body for manufacturing heavy digger Download PDFInfo
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- CN103264144B CN103264144B CN201310069227.7A CN201310069227A CN103264144B CN 103264144 B CN103264144 B CN 103264144B CN 201310069227 A CN201310069227 A CN 201310069227A CN 103264144 B CN103264144 B CN 103264144B
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Abstract
The invention discloses a kind of special loam core for the multichannel hydraulic control main valve body for manufacturing heavy digger, the valve body loam core is three layers of multichannel, the loam core of the upper layer main body valve presses casting runner distributed architecture global formation by sheet loam core by strip core print, then is mutually located by core print；The strip core print joins end to end, and forms square structure；The middle layer main body valve loam core is a strip loam core；The bottom valve body loam core is parallel 3 " c " types supporting being distributed on upper layer main body valve square structure.Top sheet loam core is mutually located by the present invention by strip core print by sheet loam core monolithic molding, then by core print, improves the combination precision of loam core；Solving similar loam core in the past needs in core shell or low using frock progress packaging efficiency, and the problem of bigger is lost during carrying and core drying in loam core.
Description
Technical field
The present invention relates to a kind of special loam core of the multichannel hydraulic control valve body of heavy digger, specifically a kind of high accuracy,
The special loam core of the multichannel hydraulic control valve body of multiple flow passages.
Background technology
The present invention relates to ZYW-J28-2-1 valve bodies.It is the main valve body of multichannel hydraulic control on 20 tons of excavators, is that heavy type is set
It is also one of current country's project that emphasis is tackled key problems in terms of hydraulic technique that the project of standby unit emphasis research and development, which is,.
ZYW-J28-2-1 valve bodies are the use multi-channel control valve body of 20 tons of excavations, its 26S Proteasome Structure and Function and Kawasaki, Japan company
5th generation valve body of production is suitable, and more more complicated than its structure, performance is more superior, is the core component of excavator.
First, valve body leading indicator parameter and research contents
1. valve body leading indicator parameter
（1）Weight 134Kg
（2）Material QT500-7
（3）Tensile strength >=500N/mm2 elongation percentage >=7%
（4）Hardness 170-230HB
（5）It is more than nodulizing grade three-level
（6）Casting sprue hole linearity is less than 1.0mm, and casting lacks without shrinkage cavity and porosity, inner flow passage without fash, scab etc.
Fall into
The technology that the valve body is mainly difficult to capture is：
（1）The hydraulic castings internal structure is complicated, belongs to multi-layer multiplex structure, and dimension precision requirement is high, therefore technically
The difficult point to be captured：Integral structure manufacturing process is combined into what loam core divided mold technique, the integrated positioning technique of loam core and loam core.
The technology that the above-mentioned technological difficulties country is not referred to, and on the pertinent literature of the world, also without the valve body
Document report.
The content of the invention
The main task of the present invention is a kind of special loam core for the multichannel hydraulic control valve body for providing heavy digger.Specifically
It is a kind of special loam core for the multi-layer multiplex hydraulic control valve body that precision is high, runner is unobstructed.
In order to solve the above technical problems, a kind of special loam core of multichannel hydraulic control valve body of heavy digger of the present invention,
The valve body loam core is three layers of multichannel, and its innovative point is：
The loam core of the upper layer main body valve presses casting runner distributed architecture global formation by sheet loam core by strip core print,
It is mutually located again by core print；The strip core print joins end to end, and forms square structure；
The middle layer main body valve loam core is a strip loam core, there was only two dot points with upper lamellar loam core, and it is supported
Point is according to the determination of casting runner distributed architecture, one side of the oblique cloth of strip loam core in upper layer main body valve loam core；
The bottom valve body loam core is parallel 3 " c " types supporting being distributed on upper layer main body valve square structure.
Further, the sheet loam core is distributed in square structure by multiple main cores are parallel, and passes through piece between main core
Shape branch flow passage connects.
The advantage of the invention is that：The invention belongs to the special loam core of multi-layer multiplex hydraulic valve, product to be produced is larger, loam core
It is complicated.Such as to can not integrally formed loam core all combined using single loam core, then need the mud of combination to want to more than 30, and this
Its dimensional accuracy error can be very big after more mud combinations.By top sheet loam core by strip core print by sheet loam core integral into
Shape, then be mutually located by core print, improve the combination precision of loam core.One strip loam core is arranged at the part bottom, only has with main core
Two dot points and this 2 points can not be accurately positioned loam core, and do not have bearing-surface to cause loam core to be lost during core drying not among loam core
Rate is very big, therefore we devise 3 " C " type supportings and positioning loam core in bottom.Pass through the improvement of process above measure, solution
Similar loam core in the past of having determined is needed in core shell or low using frock progress packaging efficiency, and loam core is during carrying and core drying
The problem of bigger is lost.
Brief description of the drawings
Fig. 1 is the upward view of the special loam core of the present invention.
Fig. 2 is the side view of the special loam core of the present invention.
Fig. 3 is upward view more than special loam core intermediate layer in the present invention.
Fig. 4 is the loam core upward view of special loam core upper layer main body valve in the present invention.
Embodiment
The loam core of the present invention is the use special loam cores of multi-channel control valve body that ZYW-J28-2-1 valve bodies are 20 tons of excavators.
As shown in Figure 1,2,3, 4, valve body loam core is three layers of multichannel.The loam core 1 of upper layer main body valve is passed through by sheet loam core 2
Strip core print 3 presses casting runner distributed architecture global formation, then is mutually located by core print 3；The core print 3 joins end to end, shape
Squarely structure.
It is specific as follows：The structure of the sheet loam core 2 is：Branch flow passage 5 between 5 main loam cores 4 and main loam core 4 connects structure
Into.The bar shaped core print 3 is strip, is trapped among the outward flange of main loam core 4, and circumferentially direction is surround in square, and with its
Interior loam core end connection positioning, is formed overall.As shown in Figure 1.
Again as shown in figure 1, middle layer main body valve loam core is a strip loam core 6, some main mud with upper lamellar loam core
In core, only have with the main loam core of two of which and the strong point 7 and the strong point 8 are identified as by a dot point respectively, its He of strong point 7
The strong point 8 determines that 6 oblique cloth of strip loam core is in the one side of upper layer main body valve loam core, and overall distribution according to casting distributed architecture
In the position of casting 1/4, and position is not center position, compares and is difficult to determine.
In order to be fixed well to strip loam core 6 and have more preferable mechanical support in operation to whole loam core,
Avoid falling apart, if bottom valve body loam core 9.The bottom valve body loam core 9 is the parallel side for being distributed in upper layer main body valve loam core 1
3 " c " types supporting in shape structure.
Claims (1)
1. a kind of special loam core for the multichannel hydraulic control main valve body for manufacturing heavy digger, valve body loam core is three layers of multichannel, and it is special
Sign is：The loam core of upper layer main body valve presses casting runner distributed architecture global formation by sheet loam core by strip core print, then leads to
Core print is crossed to be mutually located；The strip core print joins end to end, and forms square structure；Middle layer main body valve loam core is a strip mud
Core, there was only two dot points with upper lamellar loam core, its strong point determines according to casting runner distributed architecture, the oblique cloth of strip loam core
In the one side of upper layer main body valve loam core；Bottom valve body loam core is parallel 3 " c " being distributed on upper layer main body valve square structure
Type supports；The sheet loam core is distributed in square structure by multiple main cores are parallel, and is connected between main core by sheet branch flow passage
It is logical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310069227.7A CN103264144B (en) | 2013-03-05 | 2013-03-05 | A kind of special loam core for the multichannel hydraulic control valve body for manufacturing heavy digger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310069227.7A CN103264144B (en) | 2013-03-05 | 2013-03-05 | A kind of special loam core for the multichannel hydraulic control valve body for manufacturing heavy digger |
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| Publication Number | Publication Date |
|---|---|
| CN103264144A CN103264144A (en) | 2013-08-28 |
| CN103264144B true CN103264144B (en) | 2018-02-23 |
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| CN201310069227.7A Active CN103264144B (en) | 2013-03-05 | 2013-03-05 | A kind of special loam core for the multichannel hydraulic control valve body for manufacturing heavy digger |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972074B (en) * | 2015-04-24 | 2017-04-05 | 南通华东油压科技有限公司 | Hydraulic gyration valve body moulding and its mould |
| CN106001460B (en) * | 2016-07-22 | 2018-07-13 | 南通华东油压科技有限公司 | A kind of high pressure valve body moulding |
| CN108746494B (en) * | 2018-08-09 | 2024-01-26 | 江苏力源金河铸造有限公司 | Casting sand core mould of hydraulic electromagnetic valve of engineering machinery |
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| CN101456062A (en) * | 2008-12-24 | 2009-06-17 | 苏州明志科技有限公司 | Core group and core assembly process thereof |
| CN101468384A (en) * | 2007-12-25 | 2009-07-01 | 南通华东液压铸业有限公司 | Multi-layer multiplex hydraulic valve mold and casting technique thereof |
| CN102430716A (en) * | 2010-11-02 | 2012-05-02 | 江苏力源金河铸造有限公司 | Sand core manufacturing process for main body of valve body of multi-path valve |
| CN202278151U (en) * | 2011-10-19 | 2012-06-20 | 江苏力源金河铸造有限公司 | Sand core and core shell structure of valve body casting |
| CN203155949U (en) * | 2013-03-05 | 2013-08-28 | 南通华东油压科技有限公司 | Special mud core for manufacturing multi-way hydraulic-control main-body valve of heavy excavator |
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2013
- 2013-03-05 CN CN201310069227.7A patent/CN103264144B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101468384A (en) * | 2007-12-25 | 2009-07-01 | 南通华东液压铸业有限公司 | Multi-layer multiplex hydraulic valve mold and casting technique thereof |
| CN101456062A (en) * | 2008-12-24 | 2009-06-17 | 苏州明志科技有限公司 | Core group and core assembly process thereof |
| CN102430716A (en) * | 2010-11-02 | 2012-05-02 | 江苏力源金河铸造有限公司 | Sand core manufacturing process for main body of valve body of multi-path valve |
| CN202278151U (en) * | 2011-10-19 | 2012-06-20 | 江苏力源金河铸造有限公司 | Sand core and core shell structure of valve body casting |
| CN203155949U (en) * | 2013-03-05 | 2013-08-28 | 南通华东油压科技有限公司 | Special mud core for manufacturing multi-way hydraulic-control main-body valve of heavy excavator |
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| CN103264144A (en) | 2013-08-28 |
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