CN105772643A - Casting technology of directional control valve - Google Patents
Casting technology of directional control valve Download PDFInfo
- Publication number
- CN105772643A CN105772643A CN201610312238.7A CN201610312238A CN105772643A CN 105772643 A CN105772643 A CN 105772643A CN 201610312238 A CN201610312238 A CN 201610312238A CN 105772643 A CN105772643 A CN 105772643A
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- China
- Prior art keywords
- control valve
- directional control
- loam core
- silicon
- arbor
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Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- 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
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Disclosed is a casting technology of a directional control valve. The casting technology of the directional control valve comprises the steps that a molding working procedure is conducted, wherein a shell and a clay core are manufactured, core bars and vent needles are arranged in the clay core, polishing is conducted after manufacturing of the clay core is accomplished, core bar protruding portions are arranged at the two ends of the polished clay core, the clay core is horizontally placed in the shell, and the core bar protruding portions and the interior of the shell are in overlap joint; a molten metal smelting working procedure is conducted, wherein a raw material is placed into a smelting furnace to be molten, a nodulizing agent and a nucleating agent are added to the material in sequence, the nucleating agent comprises a silicon-strontium nucleating agent and a silicon-rare earth nucleating agent, the weight ratio of the silicon-strontium nucleating agent ranges from 0.2% to 0.4%, the particle size of the silicon-strontium nucleating agent ranges from 2mm to 6mm, the weight ratio of the silicon-rare earth nucleating agent ranges from 0.1% to 0.3%, and the particle size of the silicon-rare earth nucleating agent ranges from 2mm to 6mm; a casting forming working procedure is conducted, wherein water enters the shell through a sprue formed in the side; and a casting treatment working procedure is conducted, wherein polishing and heat treatment are conducted on a casting. According to the casting technology of the directional control valve, the hardness of the cast product can be improved, the cutting performance of the product can be improved, a high-precision flow channel can be formed, and the straightness of the flow channel and the accuracy of the gear size can be guaranteed.
Description
Technical field
The present invention relates to casting technology field, particularly relate to the casting technique of a kind of directional control valve.
Background technology
Directional control valve is to change gas in pipelines or the control element of the liquid flow direction.Along with hydraulic technique
Development, high-pressure high-flow be always Hydraulic Industry development an important directions.In recent years, along with engineering
The tonnage of machinery is increasing, and farm machinery hydraulic system is more and more higher to the requirement of directional control valve.
Bondioli&Pavesi group company set up at Italy Suzzara in nineteen fifty, short several
It is at leading position in power transmission shaft field, the world in year.Bondioli&Pavesi group is Italy the
One drive system that offer is complete in terms of agricultural machinery equipment, and constantly expand its product kimonos
Business scope.DC1R5 (DN85/5) is the integral valve integrating 5 kinds of direction controlling of nation's shellfish exploitation, should
Product design is advanced, high in technological content, can substitute import, and trial-produceing successfully of this product, for domestic agricultural
Machinery hydraulic system skill upgrading provides guarantee, wide market.
Above-mentioned directional control valve is mainly by casting integrated molding, and there are two difficult points in casting process: one
It it is the cutting ability how improving product while improving cast product hardness；Two is how to form high accuracy
Runner, ensure the linearity of runner and the precision of gear size.
Therefore, research and develop the casting technique of a kind of directional control valve, can be while improving cast product hardness
Improve the cutting ability of product, high-precision runner, the linearity ensureing runner and gear size can be formed again
Precision, it appears increasingly important.
Summary of the invention
It is an object of the invention to provide the founder of a kind of directional control valve for the defect that prior art exists
Skill, can improve the cutting ability of product while improving cast product hardness, can be formed again high-precision
Runner, the linearity ensureing runner and the precision of gear size.
In order to solve above-mentioned technical problem, the invention provides the casting technique of a kind of directional control valve, including
Following steps；S1, moulding operation: make housing, cast gate is set in the side of described housing；Make loam core,
Arbor and air needle are set in described loam core, and described air needle deviates described arbor and arranges；Described loam core
Polishing after completing, the two ends in the described loam core after polishing have arbor projection；By described mud
Core lies in a horizontal plane in described housing, and by the inside overlap joint of described arbor projection with described housing；S2、
Smelting metal liquid operation: first raw material are put in smelting furnace and carry out melting, be then added thereto to nodulizer
Carry out spheroidising, finally add inovulant and carry out inoculation；This inovulant is by silicon strontium inovulant and silicon
Rare earth inovulant mixing composition, wherein, the weight ratio of described silicon strontium inovulant is 0.2%-0.4%, granularity
2mm-6mm, the weight ratio of described silicon rare earth inovulant is 0.1%-0.3%, and granularity is 2mm-6mm；S3、
Foundry goods molding procedure: use the pouring technology from side pouring gate water inlet, the molten metal in step S2 is poured into
In housing in step S1, after cooling molding, i.e. obtain directional control valve foundry goods；S4, foundry goods treatment process: will
Foundry goods in step S3 carries out polishing and heat treatment, finally gives directional control valve.
Preferably, in described step S2, the weight ratio of described silicon strontium inovulant is 0.3%, silicon rare earth inovulant
Weight ratio be 0.2%.
Preferably, the height of the cast gate in described step S1 is 8mm, a length of 30mm.
Further, in described step S1, described housing includes upper shell and lower house, described upper shell and
The die cavity of directional control valve, described cast gate and described die cavity phase is formed with described loam core after described lower house matched moulds
Logical；Described loam core has for the loam core pipe that the six roots of sensation forming directional control valve runner is parallel to each other, described core
Bone and air needle are arranged in the pipe of described loam core.
Further, the top of described housing is provided with insulated feeder.
Preferably, described arbor is arranged on the inside center of described loam core pipe, and the length of described arbor is more than institute
State the length of loam core pipe.
Preferably, described arbor is made up of steel pipe.
Preferably, described loam core is by phenolic sand molding.
The casting technique of the directional control valve of the present invention, has the advantages that
1, the moulding operation of the present invention uses the die cavity degree of packing and the reasonable phenolic sand molding of stability, should
Moulding not only acts as chill effect, additionally it is possible to ensure the presentation quality of foundry goods.
2, being provided with arbor in the loam core in the moulding operation of the present invention, the two ends in the loam core after polishing have core
Bone projection, arbor projection rides over two of housing, it is ensured that arbor does not offset and do not reveals with middle part
Bone；Being additionally provided with air needle in loam core, this air needle deviation arbor is arranged, and makes arbor be in the center in loam core,
Ensure that the intensity in loam core, the smooth and linearity of flow path wall, the dimensional accuracy of gear, formed high-precision
Runner.
3, in the moulding operation of the present invention, it is contemplated that the dimension precision requirement of runner gear, and casting is many
Becoming the precision influencing whether casting dimension, the present invention adds 0.3mm at the gear that the required precision of product is high
The remained measure of repairing mold, after perfect relevant technique, finally on the premise of casting technique is stable, to solution
The foundry goods cutd open has done the analysis of channel size, and further according to the numerical value of actual measurement, analysis result has formulated the scheme of repairing a die,
Size is repaiied in the margin of tolerance of product requirement, it is ensured that product size precision.
4, in the foundry goods molding procedure of the present invention, use the thin cast gate water inlet from side, directly avoid at rising head
Superheating phenomenon.
5, in the smelting metal liquid operation of the present invention, silicon strontium inovulant and the mixing of silicon rare earth inovulant is used to breed,
Substituting traditional silicon iron inoculator, strontium can improve Graphite Morphology in Cast Iron, improves homogeneity of fault plane, and prolongation is bred
Fall time, eliminates chilling tendency, reduces Shrinkage Porosity；Rare earth element have stronger deoxidation, desulfurization and
Degassing ability, the knot that non-metallic inclusion is cast iron of a part of high diffusive degree formed after adding molten iron
Crystalline substance provides substantial amounts of external core, therefore in certain content range, can effectively refine austenite primary crystal and be total to
Colony, reduce chilling tendency, eliminate lead and bismuth to the adverse effect of Graphite Type in Gray Iron form, improve section group
Knit and improve properties, and there is the good anti-ageing characteristic moved back.Therefore both inovulants are used to mix
Conjunction breed can thinning microstructure, improving the cutting ability that can improve again product in the case of product hardness.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, below will be in embodiment or description of the prior art
The required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some bright embodiments, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the mould structure schematic diagram in the moulding operation of the present invention.
Fig. 2 is loam core pipe, arbor and the structural representation of passage in the moulding operation of the present invention.
Wherein, in figure, reference corresponds to: 1-housing, 2-loam core, and 3-loam core is managed, 4-arbor, 41-arbor
Projection, 5-air needle.
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 carried out clear,
It is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention rather than all
Embodiment.Based on embodiments of the invention, those of ordinary skill in the art are not making creative work
On the premise of the every other embodiment that obtained, broadly fall into the scope of protection of the invention.
DC1R5 (DN85/5) is the integral valve integrating 5 kinds of direction controlling of nation's shellfish exploitation, this valve body
In cuboid, this valve body includes transverse flow channels, vertical-sprue, runner mouth etc., the major technique of this valve body
Parameter is as follows:
(1) material: HT300
(2) tensile strength: >=300Mpa
(3) hardness: HB190-230
(4) valve body main aperture cylindricity: 0.8mm
(5) without the casting flaw phenomenon such as shrinkage porosite, spalling
(6) substance: 18kg
The casting difficulty of this valve body is relatively big, and relatively big to performance and required precision, and the present invention is contemplated to solve
The problems referred to above and research and develop, illustrate the present invention is how to cast direction control with specific embodiment below
Valve.
Embodiment 1
The invention provides the manufacturing process of a kind of directional control valve, mainly comprise the steps that
S1, moulding operation (as shown in figure and Fig. 2): make housing 1, arrange in the side of described housing 1
Having height is 8mm, the cast gate of a length of 30mm；Phenolic sand molding is used to make loam core 2, at described mud
Arbor 4 and air needle 5 are set in core 2, and described air needle 5 deviates described arbor 4 and arranges, described arbor
4 are made up of steel pipe；Polish after completing in described loam core 2, the two ends tool in the described loam core 2 after polishing
There is arbor projection 41；Described loam core 2 is lain in a horizontal plane in described housing 1, and by convex for described arbor
Go out the inside overlap joint of part 41 and described housing 1；Concrete attachment structure is as follows: the top of described housing 1
Being provided with insulated feeder, described housing 1 includes upper shell and lower house, described upper shell and described lower house
Forming the die cavity of directional control valve with described loam core 2 after matched moulds, described cast gate communicates with described die cavity；Described
Loam core 2 has for the loam core pipe 3 that the six roots of sensation forming directional control valve runner is parallel to each other, described arbor 4 He
Air needle 5 is arranged in described loam core pipe 3, and wherein, described arbor 4 is arranged on described loam core pipe 3
Inside center, the length of described arbor 4 is more than the length of described loam core pipe 3.
S2, smelting metal liquid operation: first raw material are put in smelting furnace and carry out melting, add the most wherein
Enter nodulizer and carry out spheroidising, finally add inovulant and carry out inoculation；This inovulant is pregnant by silicon strontium
Educating agent and silicon rare earth inovulant mixing composition, substitute traditional silicon iron inoculator, strontium can improve cast iron graphite shape
State, improves homogeneity of fault plane, extends the inoculation fade time, eliminates chilling tendency, reduces Shrinkage Porosity；Dilute
Earth elements has stronger deoxidation, desulfurization and degassing ability, a part of Gao Mi formed after adding molten iron
The non-metallic inclusion of divergence is that the crystallization of cast iron provides substantial amounts of external core, therefore at certain content range
In, can effectively refine austenite primary crystal and eutectic cell, reduce chilling tendency, eliminate lead and bismuth to casting pig stone
The adverse effect of ink form, improve fractography and improve properties, and there is good anti-ageing move back
Characteristic.Therefore use both inovulants mixing breed can thinning microstructure, improve product hardness situation
Under can improve again the cutting ability of product；Concrete preparation process is as follows: use 0.2% silicon strontium inovulant (grain
Degree 6mm) and 0.3% silicon rare earth inovulant (granularity 2mm) mix to wrap greatly and turn parcel current-following inoculation.
In addition, it is contemplated that the dimension precision requirement of runner gear, and casting changeable influences whether casting dimension
Precision, the present invention adds the remained measure of repairing mold of 0.3mm at the gear that the required precision of product is high, perfect
After relevant technique, finally on the premise of casting technique is stable, the foundry goods dissected is done channel size
Analysis, further according to actual measurement numerical value, analysis result has been formulated the scheme of repairing a die, size has been repaiied product requirement
The margin of tolerance in, it is ensured that product size precision.
S3, foundry goods molding procedure: use the pouring technology from side pouring gate water inlet, by the metal in step S2
In the housing 1 that liquid is poured in step S1, after cooling molding, i.e. obtain directional control valve foundry goods；
S4, foundry goods treatment process: carry out polishing and heat treatment by the foundry goods in step S3, finally give direction
Control valve.
Embodiment 2
The invention provides the manufacturing process of a kind of directional control valve, mainly comprise the steps that
S1, moulding operation (as shown in figure and Fig. 2): make housing 1, arrange in the side of described housing 1
Having height is 8mm, the cast gate of a length of 30mm；Phenolic sand molding is used to make loam core 2, at described mud
Arbor 4 and air needle 5 are set in core 2, and described air needle 5 deviates described arbor 4 and arranges, described arbor
4 are made up of steel pipe；Polish after completing in described loam core 2, the two ends tool in the described loam core 2 after polishing
There is arbor projection 41；Described loam core 2 is lain in a horizontal plane in described housing 1, and by convex for described arbor
Go out the inside overlap joint of part 41 and described housing 1；Concrete attachment structure is as follows: the top of described housing 1
Being provided with insulated feeder, described housing 1 includes upper shell and lower house, described upper shell and described lower house
Forming the die cavity of directional control valve with described loam core 2 after matched moulds, described cast gate communicates with described die cavity；Described
Loam core 2 has for the loam core pipe 3 that the six roots of sensation forming directional control valve runner is parallel to each other, described arbor 4 He
Air needle 5 is arranged in described loam core pipe 3, and wherein, described arbor 4 is arranged on described loam core pipe 3
Inside center, the length of described arbor 4 is more than the length of described loam core pipe 3.
S2, smelting metal liquid operation: first raw material are put in smelting furnace and carry out melting, add the most wherein
Enter nodulizer and carry out spheroidising, finally add inovulant and carry out inoculation；This inovulant is pregnant by silicon strontium
Educating agent and silicon rare earth inovulant mixing composition, substitute traditional silicon iron inoculator, strontium can improve cast iron graphite shape
State, improves homogeneity of fault plane, extends the inoculation fade time, eliminates chilling tendency, reduces Shrinkage Porosity；Dilute
Earth elements has stronger deoxidation, desulfurization and degassing ability, a part of Gao Mi formed after adding molten iron
The non-metallic inclusion of divergence is that the crystallization of cast iron provides substantial amounts of external core, therefore at certain content range
In, can effectively refine austenite primary crystal and eutectic cell, reduce chilling tendency, eliminate lead and bismuth to casting pig stone
The adverse effect of ink form, improve fractography and improve properties, and there is good anti-ageing move back
Characteristic.Therefore use both inovulants mixing breed can thinning microstructure, improve product hardness situation
Under can improve again the cutting ability of product；Concrete preparation process is as follows: be listed in stove according to following order and ratio
Interior charging: use 0.4% silicon strontium inovulant (granularity 2mm) and 0.1% silicon rare earth inovulant (granularity 6mm)
Mix big bag and turn parcel current-following inoculation.In addition, it is contemplated that the dimension precision requirement of runner gear, and
The changeable precision influencing whether casting dimension of casting, the present invention increases at the gear that the required precision of product is high
The remained measure of repairing mold of 0.3mm, after perfect relevant technique, finally in the premise that casting technique is stable
Under, the foundry goods dissected has been done the analysis of channel size, further according to the numerical value of actual measurement, analysis result is formulated
Repair a die scheme, size is repaiied in the margin of tolerance of product requirement, it is ensured that product size precision.
S3, foundry goods molding procedure: use the pouring technology from side pouring gate water inlet, by the metal in step S2
In the housing 1 that liquid is poured in step S1, after cooling molding, i.e. obtain directional control valve foundry goods；
S4, foundry goods treatment process: carry out polishing and heat treatment by the foundry goods in step S3, finally give direction
Control valve.
Embodiment 3
The invention provides the manufacturing process of a kind of directional control valve, mainly comprise the steps that
S1, moulding operation (as shown in figure and Fig. 2): make housing 1, arrange in the side of described housing 1
Having height is 8mm, the cast gate of a length of 30mm；Phenolic sand molding is used to make loam core 2, at described mud
Arbor 4 and air needle 5 are set in core 2, and described air needle 5 deviates described arbor 4 and arranges, described arbor
4 are made up of steel pipe；Polish after completing in described loam core 2, the two ends tool in the described loam core 2 after polishing
There is arbor projection 41；Described loam core 2 is lain in a horizontal plane in described housing 1, and by convex for described arbor
Go out the inside overlap joint of part 41 and described housing 1；Concrete attachment structure is as follows: the top of described housing 1
Being provided with insulated feeder, described housing 1 includes upper shell and lower house, described upper shell and described lower house
Forming the die cavity of directional control valve with described loam core 2 after matched moulds, described cast gate communicates with described die cavity；Described
Loam core 2 has for the loam core pipe 3 that the six roots of sensation forming directional control valve runner is parallel to each other, described arbor 4 He
Air needle 5 is arranged in described loam core pipe 3, and wherein, described arbor 4 is arranged on described loam core pipe 3
Inside center, the length of described arbor 4 is more than the length of described loam core pipe 3.
S2, smelting metal liquid operation: first raw material are put in smelting furnace and carry out melting, add the most wherein
Enter nodulizer and carry out spheroidising, finally add inovulant and carry out inoculation；This inovulant is pregnant by silicon strontium
Educating agent and silicon rare earth inovulant mixing composition, substitute traditional silicon iron inoculator, strontium can improve cast iron graphite shape
State, improves homogeneity of fault plane, extends the inoculation fade time, eliminates chilling tendency, reduces Shrinkage Porosity；Dilute
Earth elements has stronger deoxidation, desulfurization and degassing ability, a part of Gao Mi formed after adding molten iron
The non-metallic inclusion of divergence is that the crystallization of cast iron provides substantial amounts of external core, therefore at certain content range
In, can effectively refine austenite primary crystal and eutectic cell, reduce chilling tendency, eliminate lead and bismuth to casting pig stone
The adverse effect of ink form, improve fractography and improve properties, and there is good anti-ageing move back
Characteristic.Therefore use both inovulants mixing breed can thinning microstructure, improve product hardness situation
Under can improve again the cutting ability of product；Concrete preparation process is as follows: use 0.3% silicon strontium inovulant (grain
Degree 4mm) and 0.2% silicon rare earth inovulant (granularity 4mm) mix to wrap greatly and turn parcel current-following inoculation.
In addition, it is contemplated that the dimension precision requirement of runner gear, and casting changeable influences whether casting dimension
Precision, the present invention adds the remained measure of repairing mold of 0.3mm at the gear that the required precision of product is high, perfect
After relevant technique, finally on the premise of casting technique is stable, the foundry goods dissected is done channel size
Analysis, further according to actual measurement numerical value, analysis result has been formulated the scheme of repairing a die, size has been repaiied product requirement
The margin of tolerance in, it is ensured that product size precision.
S3, foundry goods molding procedure: use the pouring technology from side pouring gate water inlet, by the metal in step S2
In the housing 1 that liquid is poured in step S1, after cooling molding, i.e. obtain directional control valve foundry goods；
S4, foundry goods treatment process: carry out polishing and heat treatment by the foundry goods in step S3, finally give direction
Control valve.
The casting technique of the directional control valve of the present invention, has the advantages that
1, the moulding operation of the present invention uses the die cavity degree of packing and the reasonable phenolic sand molding of stability, should
Moulding not only acts as chill effect, additionally it is possible to ensure the presentation quality of foundry goods.
2, being provided with arbor in the loam core in the moulding operation of the present invention, the two ends in the loam core after polishing have core
Bone projection, arbor projection rides over two of housing, it is ensured that arbor does not offset and do not reveals with middle part
Bone；Being additionally provided with air needle in loam core, this air needle deviation arbor is arranged, and makes arbor be in the center in loam core,
Ensure that the intensity in loam core, the smooth and linearity of flow path wall, the dimensional accuracy of gear, formed high-precision
Runner.
3, in the moulding operation of the present invention, it is contemplated that the dimension precision requirement of runner gear, and casting is many
Becoming the precision influencing whether casting dimension, the present invention adds 0.3mm at the gear that the required precision of product is high
The remained measure of repairing mold, after perfect relevant technique, finally on the premise of casting technique is stable, to solution
The foundry goods cutd open has done the analysis of channel size, and further according to the numerical value of actual measurement, analysis result has formulated the scheme of repairing a die,
Size is repaiied in the margin of tolerance of product requirement, it is ensured that product size precision.
4, in the foundry goods molding procedure of the present invention, use the thin cast gate water inlet from side, directly avoid at rising head
Superheating phenomenon.
5, in the smelting metal liquid operation of the present invention, silicon strontium inovulant and the mixing of silicon rare earth inovulant is used to breed,
Substituting traditional silicon iron inoculator, strontium can improve Graphite Morphology in Cast Iron, improves homogeneity of fault plane, and prolongation is bred
Fall time, eliminates chilling tendency, reduces Shrinkage Porosity；Rare earth element have stronger deoxidation, desulfurization and
Degassing ability, the knot that non-metallic inclusion is cast iron of a part of high diffusive degree formed after adding molten iron
Crystalline substance provides substantial amounts of external core, therefore in certain content range, can effectively refine austenite primary crystal and be total to
Colony, reduce chilling tendency, eliminate lead and bismuth to the adverse effect of Graphite Type in Gray Iron form, improve section group
Knit and improve properties, and there is the good anti-ageing characteristic moved back.Therefore both inovulants are used to mix
Conjunction breed can thinning microstructure, improving the cutting ability that can improve again product in the case of product hardness.
Above disclosed only several preferred embodiment of the present invention, can not limit this with this certainly
Bright interest field, the equivalent variations therefore made according to the claims in the present invention, still belong to what the present invention was contained
Scope.
Claims (8)
1. the casting technique of a directional control valve, it is characterised in that comprise the following steps:
S1, moulding operation: make housing (1), cast gate is set in the side of described housing (1)；Make
Loam core (2), arranges arbor (4) and air needle (5), and described air needle in described loam core (2)
(5) deviate described arbor (4) to arrange；Polish, after polishing after completing in described loam core (2)
The two ends in described loam core (2) have arbor projection (41)；Described loam core (2) are lain in a horizontal plane in
In described housing (1), and by the inside overlap joint of described arbor projection (41) with described housing (1)；
S2, smelting metal liquid operation: first raw material are put in smelting furnace and carry out melting, add the most wherein
Enter nodulizer and carry out spheroidising, finally add inovulant and carry out inoculation；This inovulant is pregnant by silicon strontium
Educating agent and silicon rare earth inovulant mixing composition, wherein, the weight ratio of described silicon strontium inovulant is 0.2%-0.4%,
Granularity 2mm-6mm, the weight ratio of described silicon rare earth inovulant is 0.1%-0.3%, and granularity is 2mm-6mm；
S3, foundry goods molding procedure: use the pouring technology from side pouring gate water inlet, by the metal in step S2
In the housing (1) that liquid is poured in step S1, after cooling molding, i.e. obtain directional control valve foundry goods；
S4, foundry goods treatment process: carry out polishing and heat treatment by the foundry goods in step S3, finally give direction
Control valve.
The casting technique of directional control valve the most according to claim 1, it is characterised in that described step
In S2, the weight ratio of described silicon strontium inovulant is 0.3%, and the weight ratio of silicon rare earth inovulant is 0.2%.
The casting technique of directional control valve the most according to claim 1, it is characterised in that described step
The height of the cast gate in S1 is 8mm, a length of 30mm.
The casting technique of directional control valve the most according to claim 1, it is characterised in that described step
In S1, described housing (1) include after upper shell and lower house, described upper shell and described lower house matched moulds with
Described loam core (2) forms the die cavity of directional control valve, and described cast gate communicates with described die cavity；Described loam core (2)
Have for loam core pipe (3) that the six roots of sensation forming directional control valve runner is parallel to each other, described arbor (4)
It is arranged in described loam core pipe (3) with air needle (5).
The casting technique of directional control valve the most according to claim 4, it is characterised in that described housing
(1) top is provided with insulated feeder.
6. according to the casting technique of the directional control valve described in claim 4 or 5, it is characterised in that described
Arbor (4) is arranged on the inside center in described loam core pipe (3), and the length of described arbor (4) is more than described
The length in loam core pipe (3).
The casting technique of directional control valve the most according to claim 6, it is characterised in that described arbor
(4) it is made up of steel pipe.
The casting technique of directional control valve the most according to claim 7, it is characterised in that described loam core
(2) by phenolic sand molding.
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| CN201610312238.7A CN105772643A (en) | 2016-05-12 | 2016-05-12 | Casting technology of directional control valve |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636878A (en) * | 2017-01-19 | 2017-05-10 | 溧阳市万盛铸造有限公司 | Production technology of crankcase casting |
| CN107035679A (en) * | 2017-06-12 | 2017-08-11 | 南通华东油压科技有限公司 | A kind of Vehicle loaded pump valve body moulding |
| CN107061831A (en) * | 2017-06-12 | 2017-08-18 | 南通华东油压科技有限公司 | A kind of Novel work joins valve body moulding |
| WO2018039859A1 (en) * | 2016-08-29 | 2018-03-08 | 丁洋 | Monolithic multi-way valve body casting |
| WO2018039857A1 (en) * | 2016-08-29 | 2018-03-08 | 丁洋 | Casting technology for directional control valve |
| CN109261905A (en) * | 2018-09-13 | 2019-01-25 | 南通华东油压科技有限公司 | A kind of type core manufacturing valve body |
| CN109648059A (en) * | 2019-02-20 | 2019-04-19 | 日本电产东测（浙江）有限公司 | Hydraulic control valve device mold for forming |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0783915B2 (en) * | 1986-02-17 | 1995-09-13 | トヨタ自動車株式会社 | Disappearance model for casting cylinder heads for internal combustion engines. |
| CN1927505A (en) * | 2006-09-26 | 2007-03-14 | 西峡县西泵特种铸造有限公司 | High nickel austenite spheroidal graphite cast iron automobile exhaust branch pipe and casting method |
| CN202087778U (en) * | 2011-05-13 | 2011-12-28 | 无锡德乾能源设备有限公司 | Core rod |
| CN102513507A (en) * | 2011-12-15 | 2012-06-27 | 上海沪临重工有限公司 | Core bar of sand core of steel pipe and manufacturing method of sand core |
| CN103320675A (en) * | 2013-06-21 | 2013-09-25 | 辽宁远宇重工机械有限公司 | 300 DEG C-350 DEG C high-temperature resistant alloy material and casting method of 300 DEG C-350 DEG C high-temperature compressor pressure-containing member |
| CN203390167U (en) * | 2013-07-15 | 2014-01-15 | 四川宏亚机械有限公司 | Novel fixed valve mud core device |
| CN104043784A (en) * | 2014-06-24 | 2014-09-17 | 南通华东油压科技有限公司 | Overflow valve casting mold and casting technique |
-
2016
- 2016-05-12 CN CN201610312238.7A patent/CN105772643A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0783915B2 (en) * | 1986-02-17 | 1995-09-13 | トヨタ自動車株式会社 | Disappearance model for casting cylinder heads for internal combustion engines. |
| CN1927505A (en) * | 2006-09-26 | 2007-03-14 | 西峡县西泵特种铸造有限公司 | High nickel austenite spheroidal graphite cast iron automobile exhaust branch pipe and casting method |
| CN202087778U (en) * | 2011-05-13 | 2011-12-28 | 无锡德乾能源设备有限公司 | Core rod |
| CN102513507A (en) * | 2011-12-15 | 2012-06-27 | 上海沪临重工有限公司 | Core bar of sand core of steel pipe and manufacturing method of sand core |
| CN103320675A (en) * | 2013-06-21 | 2013-09-25 | 辽宁远宇重工机械有限公司 | 300 DEG C-350 DEG C high-temperature resistant alloy material and casting method of 300 DEG C-350 DEG C high-temperature compressor pressure-containing member |
| CN203390167U (en) * | 2013-07-15 | 2014-01-15 | 四川宏亚机械有限公司 | Novel fixed valve mud core device |
| CN104043784A (en) * | 2014-06-24 | 2014-09-17 | 南通华东油压科技有限公司 | Overflow valve casting mold and casting technique |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018039859A1 (en) * | 2016-08-29 | 2018-03-08 | 丁洋 | Monolithic multi-way valve body casting |
| WO2018039857A1 (en) * | 2016-08-29 | 2018-03-08 | 丁洋 | Casting technology for directional control valve |
| CN106636878A (en) * | 2017-01-19 | 2017-05-10 | 溧阳市万盛铸造有限公司 | Production technology of crankcase casting |
| CN107035679A (en) * | 2017-06-12 | 2017-08-11 | 南通华东油压科技有限公司 | A kind of Vehicle loaded pump valve body moulding |
| CN107061831A (en) * | 2017-06-12 | 2017-08-18 | 南通华东油压科技有限公司 | A kind of Novel work joins valve body moulding |
| CN109261905A (en) * | 2018-09-13 | 2019-01-25 | 南通华东油压科技有限公司 | A kind of type core manufacturing valve body |
| CN109648059A (en) * | 2019-02-20 | 2019-04-19 | 日本电产东测（浙江）有限公司 | Hydraulic control valve device mold for forming |
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