CN105757308A - Hydraulic pilot valve body casting and die thereof - Google Patents
Hydraulic pilot valve body casting and die thereof Download PDFInfo
- Publication number
- CN105757308A CN105757308A CN201610255140.2A CN201610255140A CN105757308A CN 105757308 A CN105757308 A CN 105757308A CN 201610255140 A CN201610255140 A CN 201610255140A CN 105757308 A CN105757308 A CN 105757308A
- Authority
- CN
- China
- Prior art keywords
- core
- valve body
- hydraulic pilot
- pilot valve
- foundry goods
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/106—Vented or reinforced cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a hydraulic pilot valve body casting.The hydraulic pilot valve body casting comprises a valve body and a valve base, wherein the valve body is cylindrical, the valve base is square, seven vertical runners are arranged inside the valve body, and seven runner ports corresponding to the seven vertical runners are formed in the top of the valve body.The invention further discloses a hydraulic pilot valve body casting die.A sand core is formed by assembly of a main core body and a plurality of small core bodies, wherein the main core body comprises a left core and a right core, a hollow portion used for gathering gas is defined by the left core and the right core after bonding formation, and a vertical exhaust port is formed in the top of each small core bodies.A sprue cup and a dead head are arranged at the upper end of a shell mold, the bottom of the dead head is connected with the upper end of a mold cavity, and the sprue cup is connected with the lower end of the mold cavity through a pouring gate to be used for injecting pouring liquid from the bottom of the mold cavity.The number of air holes in the surface of the hydraulic pilot valve body casting is small, and core breaking portion during casting is small.
Description
Technical field
The present invention relates to valve body moulding and mould applications thereof, particularly relate to a kind of hydraulic pilot valve body foundry goods and mould thereof.
Background technology
Hydraulic pilot valve body foundry goods, is mainly used in large-duty loader hydraulic control system, as construction machinery hydraulic system key components and parts, has the advantages such as high, highly reliable, the life-span length of integrated level, good market prospect.But CHINESE INDUSTRIES is strong greatly and not, low-and-medium-grade products production capacity surplus and present situation that high-end Hydraulic Elements are almost completely dependent on import is badly in need of solving.
Existing hydraulic pilot valve body foundry goods has the disadvantage in that one, pore is more on this foundry goods, the percent defective that plane pore causes reaches more than 70, main cause is core thickness in the middle of casting die, gas forming amount is big, and the core diameter connecting this core only has 5 millimeters, it is difficult to the gas by middle core sends promptly be discharged to outside casting mold, has gas greatly to invade and in casting mold, produce bleb；Two, this foundry goods runner is very complicated, centre core is relatively big, and thickness reaches 20 millimeter, and the core connecting this centre sand is only small, diameter only has 5 millimeter, and it is high that the core that during cast, core aerofluxus is smooth and not tiny rushes disconnected core ratio under existing and high temperature action at molten iron.
Therefore, research and develop a kind of pore is less and core fracture ratio is relatively low hydraulic pilot valve body foundry goods and produce the mould of this foundry goods, it appears be increasingly important.
Summary of the invention
It is an object of the invention to overcome the hydraulic pilot valve body foundry goods that defect a kind of pore of proposition is less and core fracture ratio is relatively low of prior art and mould thereof.
In order to solve above-mentioned technical problem, the invention provides a kind of hydraulic pilot valve body foundry goods, including valve body and valve base, described valve body is cylindrical, described valve base is square, the inside of described valve body is provided with seven vertical-sprues, and the top of described valve body is provided with seven the runner mouths corresponding with described seven vertical-sprues.
Preferably, the top center of described valve body is provided with a runner mouth I, and the distribution evenly around of described runner mouth I has six runner mouths II, six described hexagonal arrangements of runner mouth II.
Preferably, the diameter of described runner mouth I is more than the diameter of described runner mouth II.
Further, described valve body and described valve base adopt bottom casting technique one-body molded.
Present invention also offers a kind of hydraulic pilot casting die, including shell mould and core, described shell mould includes left housing type and right shell mould, described core is arranged in the middle of described left housing type and right shell mould, die cavity is formed after described left housing type, right shell mould and described core matched moulds, described core is by main core and some little assembly of sand core molding, described main core includes left core and right core, it is internally formed one for assembling the hollow part of gas after described left core and the bonding shaping of right core, the top of described little core is provided with vertical row pore；The upper end of described shell mould is provided with cup and rising head, and the bottom of described rising head is connected with the upper end of described die cavity, and described cast gate is connected with the lower end of described die cavity by running channel, for being injected from the bottom of described die cavity by potting syrup.
Preferably, described rising head is exothermic riser, and diameter is 80mm.
Preferably, described core is precoated sand core.
The hydraulic pilot valve body foundry goods of the present invention and mould thereof, have the advantages that
1, the hydraulic pilot valve body foundry goods tensile strength of the present invention is not less than 240Mpa, and hardness is 190HB-220HB, and this foundry goods integrated intensity height, reliability and service life are longer.
2, the left core of main core of the hydraulic pilot valve body casting die of the present invention and right core, it is internally formed one for assembling the hollow part of gas after described left core and the bonding shaping of right core, and vertical row pore is set at the top of little core, in casting process, the gas that this steam vent speed will accumulate in hollow part is discharged to outside type, greatly reduces the pore of foundry goods；Additionally, the main core of inner hollow decreases precoated sand consumption and gas forming amount.
3, the cast gate of the hydraulic pilot valve body casting die of the present invention is connected with the lower end of described die cavity by running channel, for potting syrup is injected from the bottom of described die cavity, make molten iron liquid stream steady, decrease the core fracture that molten iron turbulent flow causes and be conducive to aerofluxus, it is ensured that the outstanding core in both sides is unlikely to deform, ruptures.
4, the rising head of the shell mould upper end of the hydraulic pilot valve body casting die of the present invention is diameter is the exothermic riser of 80mm, and the feeding effect of strengthening rising head, the molten iron of chill water and gassiness, slag spills in rising head simultaneously, decreases slag and the gas hole defect of foundry goods.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the top view of the hydraulic pilot valve body foundry goods of the present invention；
Fig. 2 is the A-A direction sectional view of Fig. 1；
Fig. 3 is the B-B direction sectional view of Fig. 1；
Fig. 4 is the C-C direction sectional view of Fig. 1；
Fig. 5 is the lateral plan of the hydraulic pilot valve body foundry goods of the present invention.
Wherein, in figure, accompanying drawing labelling corresponds to: 1-valve body, 2-valve base, 3-vertical-sprue, 4-runner mouth, 41-runner mouth I, 42-runner mouth II.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in inventive embodiments is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
Referring to Fig. 1-5, the invention discloses a kind of hydraulic pilot valve body foundry goods, including valve body 1 and valve base 2, described valve body 1 and described valve base 2 adopt bottom casting technique one-body molded；Described valve body 1 is cylindrical, and described valve base 2 is in square, and the inside of described valve body 1 is provided with seven vertical-sprues 3, and the top of described valve body 1 is provided with seven the runner mouths 4 corresponding with described seven vertical-sprues 3；The distribution situation of seven runner mouths is as follows: the top center of described valve body 1 is provided with a runner mouth I 41, the distribution evenly around of described runner mouth I 41 has six runner mouths II 42, six described hexagonal arrangements of runner mouth II 42, the diameter of described runner mouth I 41 is more than the diameter of described runner mouth II 42.
The important technological parameters of the hydraulic pilot valve body foundry goods of the present invention is as follows:
(1) material: HT300
(2) body tensile strength: >=240Mpa
(3) hardness: HB190-220
(4) without casting flaws such as slag inclusion, pore, shrinkage cavity and porosities
(5) substance: 5.2kg.
The invention also discloses a kind of hydraulic pilot valve body casting die, including shell mould and core, described shell mould includes left housing type and right shell mould, described core is arranged in the middle of described left housing type and right shell mould, described left housing type, die cavity is formed after right shell mould and described core matched moulds, described core is precoated sand core, it is by main core and some little assembly of sand core molding, described main core includes left core and right core, it is internally formed one for assembling the hollow part of gas after described left core and the bonding shaping of right core, the top of described little core is provided with vertical row pore, the air accumulation that this core sends under heating status is in hollow part, the gas that core sends promptly is discharged to outside type by the steam vent on little core, it is greatly reduced the pore of foundry goods.
The upper end of described shell mould is provided with cup, described cast gate is connected with the lower end of described die cavity by running channel, for potting syrup is injected from the bottom of described die cavity, namely changed into rising pouring technique by existing teeming technique, make molten iron liquid stream steady, decrease the core fracture that molten iron turbulent flow causes and be conducive to aerofluxus, it is ensured that the outstanding core in both sides is unlikely to deform, ruptures.
Rising pouring technique casting pressing port becomes cold rising head, it is unfavorable for feeding, therefore the upper end of described shell mould is provided with rising head, the bottom of rising head is connected with the upper end of described die cavity, this rising head diameter is the exothermic riser of 80mm, the feeding effect of strengthening rising head, the molten iron of chill water and gassiness, slag spills in rising head simultaneously, decreases slag and the gas hole defect of foundry goods.
The hydraulic pilot valve body foundry goods of the present invention and mould thereof, have the advantages that
1, the hydraulic pilot valve body foundry goods tensile strength of the present invention is not less than 240Mpa, and hardness is 190HB-220HB, and this foundry goods integrated intensity height, reliability and service life are longer.
2, the left core of main core of the hydraulic pilot valve body casting die of the present invention and right core, it is internally formed one for assembling the hollow part of gas after described left core and the bonding shaping of right core, and vertical row pore is set at the top of little core, in casting process, the gas that this steam vent speed will accumulate in hollow part is discharged to outside type, greatly reduces the pore of foundry goods；Additionally, the main core of inner hollow decreases precoated sand consumption and gas forming amount.
3, the cast gate of the hydraulic pilot valve body casting die of the present invention is connected with the lower end of described die cavity by running channel, for potting syrup is injected from the bottom of described die cavity, make molten iron liquid stream steady, decrease the core fracture that molten iron turbulent flow causes and be conducive to aerofluxus, it is ensured that the outstanding core in both sides is unlikely to deform, ruptures.
4, the rising head of the shell mould upper end of the hydraulic pilot valve body casting die of the present invention is diameter is the exothermic riser of 80mm, and the feeding effect of strengthening rising head, the molten iron of chill water and gassiness, slag spills in rising head simultaneously, decreases slag and the gas hole defect of foundry goods.
Upper disclosed is only presently preferred embodiments of the present invention, certainly can not limit the interest field of the present invention, the equivalent variations therefore made according to the claims in the present invention with this, still belong to the scope that the present invention contains.
Claims (7)
1. a hydraulic pilot valve body foundry goods, it is characterized in that, including valve body (1) and valve base (2), described valve body (1) is cylindrical, described valve base (2) is in square, the inside of described valve body (1) is provided with seven vertical-sprues (3), and the top of described valve body (1) is provided with seven the runner mouths (4) corresponding with described seven vertical-sprues (3).
2. hydraulic pilot valve body foundry goods according to claim 1, it is characterized in that, the top center of described valve body (1) is provided with a runner mouth I (41), the distribution evenly around of described runner mouth I (41) has six runner mouths II (42), the hexagonal arrangement of six described runner mouths II (42).
3. hydraulic pilot valve body foundry goods according to claim 2, it is characterised in that the diameter of described runner mouth I (41) is more than the diameter of described runner mouth II (42).
4. the hydraulic pilot valve body foundry goods according to any one claim in claim 1-3, it is characterised in that described valve body (1) and described valve base (2) adopt bottom casting technique one-body molded.
5. a hydraulic pilot valve body casting die, including shell mould and core, described shell mould includes left housing type and right shell mould, described core is arranged in the middle of described left housing type and right shell mould, die cavity is formed after described left housing type, right shell mould and described core matched moulds, it is characterised in that
Described core is by main core and some little assembly of sand core molding, described main core includes left core and right core, it is internally formed one for assembling the hollow part of gas after described left core and the bonding shaping of right core, the top of described little core is provided with vertical row pore；
The upper end of described shell mould is provided with cup and rising head, and the bottom of described rising head is connected with the upper end of described die cavity, and described cast gate is connected with the lower end of described die cavity by running channel, for being injected from the bottom of described die cavity by potting syrup.
6. hydraulic pilot valve body casting die according to claim 5, it is characterised in that described rising head is exothermic riser, and diameter is 80mm.
7. the hydraulic pilot valve body casting die according to claim 5 or 6, it is characterised in that described core is precoated sand core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610255140.2A CN105757308B (en) | 2016-04-22 | 2016-04-22 | A kind of hydraulic pilot valve body casting and its mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610255140.2A CN105757308B (en) | 2016-04-22 | 2016-04-22 | A kind of hydraulic pilot valve body casting and its mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105757308A true CN105757308A (en) | 2016-07-13 |
| CN105757308B CN105757308B (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610255140.2A Active CN105757308B (en) | 2016-04-22 | 2016-04-22 | A kind of hydraulic pilot valve body casting and its mold |
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| CN (1) | CN105757308B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218426A (en) * | 2017-06-12 | 2017-09-29 | 南通华东油压科技有限公司 | A kind of pilot valve casting and its casting technique |
| CN107470566A (en) * | 2017-09-25 | 2017-12-15 | 泰州康乾机械制造有限公司 | Reduce the method and sand core structure of permanent mold casting thin-wall case flange turning position gas hole defect |
| WO2018039854A1 (en) * | 2016-08-29 | 2018-03-08 | 丁洋 | Casting mould for hydraulic valve body used in large loader and manufacturing method therefor |
| WO2018039853A1 (en) * | 2016-08-29 | 2018-03-08 | 丁先华 | Hydraulic pilot valve body casting and mould therefor |
| CN108405803A (en) * | 2018-05-04 | 2018-08-17 | 南通华东油压科技有限公司 | 78A0406M valve bodies and its processing technology |
| CN108637178A (en) * | 2018-05-04 | 2018-10-12 | 南通华东油压科技有限公司 | TS0682130002 distributors valve body and its processing technology |
| CN108941515A (en) * | 2018-09-13 | 2018-12-07 | 南通华东油压科技有限公司 | A kind of casting method of the mechanical-hydraulic valve body with seamless steel pipe |
| CN109454205A (en) * | 2018-12-13 | 2019-03-12 | 淮海工业集团有限公司 | A kind of sand mold of revolution solid of curved surface |
| CN110090925A (en) * | 2019-05-15 | 2019-08-06 | 江苏力源金河铸造有限公司 | Engineering machinery hydraulic valve body sand core structure |
| CN110434292A (en) * | 2018-05-03 | 2019-11-12 | 上海五钢设备工程有限公司 | Two phase stainless steel valve body casting technique |
| CN110479966A (en) * | 2019-09-10 | 2019-11-22 | 南通华东油压科技有限公司 | Multiple flow passages revolving body casting, multiple flow passages revolving body and the casting mold for being poured multiple flow passages revolving body casting |
| CN111283145A (en) * | 2020-03-23 | 2020-06-16 | 苏州勤美达精密机械有限公司 | Novel core assembly process and application |
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| CN203459629U (en) * | 2013-07-31 | 2014-03-05 | 四川省祥业机械铸造有限公司 | Gating system of round revolved body casting |
| CN104972074A (en) * | 2015-04-24 | 2015-10-14 | 南通华东油压科技有限公司 | Hydraulic rotation valve casting and die thereof |
| CN205715888U (en) * | 2016-04-22 | 2016-11-23 | 南通华东油压科技有限公司 | A kind of hydraulic pilot valve body foundry goods |
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| JP2008144887A (en) * | 2006-12-12 | 2008-06-26 | Nikki Co Ltd | Valve gear for gaseous fuel |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018039854A1 (en) * | 2016-08-29 | 2018-03-08 | 丁洋 | Casting mould for hydraulic valve body used in large loader and manufacturing method therefor |
| WO2018039853A1 (en) * | 2016-08-29 | 2018-03-08 | 丁先华 | Hydraulic pilot valve body casting and mould therefor |
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| CN107218426A (en) * | 2017-06-12 | 2017-09-29 | 南通华东油压科技有限公司 | A kind of pilot valve casting and its casting technique |
| CN107470566A (en) * | 2017-09-25 | 2017-12-15 | 泰州康乾机械制造有限公司 | Reduce the method and sand core structure of permanent mold casting thin-wall case flange turning position gas hole defect |
| CN110434292A (en) * | 2018-05-03 | 2019-11-12 | 上海五钢设备工程有限公司 | Two phase stainless steel valve body casting technique |
| CN108405803B (en) * | 2018-05-04 | 2023-05-12 | 南通华东油压科技有限公司 | Valve body and processing technology thereof |
| CN108637178A (en) * | 2018-05-04 | 2018-10-12 | 南通华东油压科技有限公司 | TS0682130002 distributors valve body and its processing technology |
| CN108637178B (en) * | 2018-05-04 | 2023-05-23 | 南通华东油压科技有限公司 | Distributor valve body |
| CN108405803A (en) * | 2018-05-04 | 2018-08-17 | 南通华东油压科技有限公司 | 78A0406M valve bodies and its processing technology |
| CN108941515A (en) * | 2018-09-13 | 2018-12-07 | 南通华东油压科技有限公司 | A kind of casting method of the mechanical-hydraulic valve body with seamless steel pipe |
| CN109454205A (en) * | 2018-12-13 | 2019-03-12 | 淮海工业集团有限公司 | A kind of sand mold of revolution solid of curved surface |
| CN109454205B (en) * | 2018-12-13 | 2024-01-26 | 淮海工业集团有限公司 | Sand mould of curved surface revolution body |
| CN110090925A (en) * | 2019-05-15 | 2019-08-06 | 江苏力源金河铸造有限公司 | Engineering machinery hydraulic valve body sand core structure |
| CN110090925B (en) * | 2019-05-15 | 2024-04-05 | 江苏力源金河铸造有限公司 | Sand core structure of hydraulic valve body of engineering machinery |
| CN110479966A (en) * | 2019-09-10 | 2019-11-22 | 南通华东油压科技有限公司 | Multiple flow passages revolving body casting, multiple flow passages revolving body and the casting mold for being poured multiple flow passages revolving body casting |
| CN111283145A (en) * | 2020-03-23 | 2020-06-16 | 苏州勤美达精密机械有限公司 | Novel core assembly process and application |
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