CN108660365A - A kind of production technology of 7H diesel engine cylinder covers casting - Google Patents
A kind of production technology of 7H diesel engine cylinder covers casting Download PDFInfo
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- CN108660365A CN108660365A CN201810375219.8A CN201810375219A CN108660365A CN 108660365 A CN108660365 A CN 108660365A CN 201810375219 A CN201810375219 A CN 201810375219A CN 108660365 A CN108660365 A CN 108660365A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- 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
- B22C9/10—Cores; Manufacture or installation of 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
Abstract
The invention discloses a kind of production technologies of 7H diesel engine cylinder covers casting, the present invention overturns multiple anti-lost technology using overweight sand core, monoblock type air intake duct sand core is due to being added to the overweight nearly 15Kg of chromite sand, group core is overturn in dip-coating on pedestal core only easily to fall down by gluing, other than gluing, two side pressure core support of sand core, fastening screw above sand core, sand core side is also used to beat the multiple anti-lost measure technology of nailing.The multi-sealed technology of cylinder cap water channel sand cores venthole of the present invention, cylinder cap water channel sand cores are surrounded by molten iron, if sand core outlet is bad, easily cause bleb defect, places using sand core head asbestos washer with holes in sand core outlet, pressure sand ring is discharged around sand core venthole, places the multi-sealed measure technologies such as pressure sand ring around molten iron riser.
Description
Technical field
The invention belongs to castings production fields, and in particular to a kind of production technology of 7H diesel engine cylinder covers casting.
Background technology
Cylinder cap is one of main composition part of automobile engine, it is located at the upper part of engine cylinder body.Should have on cylinder cap
Valve seat and valve guide bushing and inlet and outlet door etc..Effect：(1) sealed cylinder block top；(2) constitute combustion chamber (with
Cylinder wall and piston top are together)；(3) constitute inlet and exhaust system and cooling system in supply system, lube system a part (be cast with into,
Exhaust passage and cooling jacket or cooling fin, oil leab).It is required that：(1) high temperature resistant, high pressure；(2) corrosion-resistant；(3) enough
Rigidity and intensity.The project application is developed on 7H diesel engines according to goods batch, and sufficient design verification is carried out, it is ensured that production
Quality.Its main mating application range：Road roller (14~16 tons of single steel wheel machinery road rollers, medium and small tonnages are all-hydraulic), 6
~8 meters of cars, in 7~12 tons, light truck and chassis, air compressor machine, rock drill, tractor and harvest machinery etc. are strong dynamic with it
The low oil consumption of power attracts users.
With the fast development of science and technology, casting industry management level it is continuous promoted and domestic human cost it is continuous
It is soaring.Foundry Production is just towards NC postprocessing, intelligence, informationization, automation development.How breakthrough bottleneck is synchronous with the world, at
Target for domestic casting industry and direction.The successful research and development of the present invention, by the casting of promotion enterprise or even industry towards intelligence
The direction of change is developed, and will meet production requirement rapidly and efficiently, and raise labour productivity, compression casting cost of labor, reduce because
The factors such as manual operation cause fraction defective, reduce waste of raw materials, and energy conservation and environmental protection improves Business Economic Benefit and social benefit,
Competitiveness of this department product in world market will greatly be enhanced.
Invention content
Goal of the invention：In order to solve the deficiencies in the prior art, the present invention provides a kind of lifes of 7H diesel engine cylinder covers casting
Production. art.
Technical solution：A kind of production technology of 7H diesel engine cylinder covers casting, includes the following steps：
Step 1: coremaking material incoming test：According to triethylamine cold core roughing sand stock up technology requirement, to roughing sand granularity and point
Cloth, moisture amount containing mud, chemical property are tested；It is stocked up technology requirement according to triethylamine cold core roughing sand, to resin viscosity, close
Degree, intensity, gas forming amount are tested；According to foundry facing stock up technology requirement, to coating baume, density, suspension, hair
Tolerance, solid content are tested；
Step 2: feedstock processing：Roughing sand temperature is 30 ± 10 DEG C, special sand temperature is 30 ± 10 DEG C, resin temperature 25
±10℃；
Step 3: mulling：Roughing sand, chromite sand and nice foundry sand, curing agent and resin are put into sand mixer and mixed,
In, weight ratio is as follows：Roughing sand 20%, chromite sand and nice foundry sand is each 35%, resin 2%, curing agent are several, mulling time is
35-65 seconds；
Step 4: coremaking：Mulling is put into core making machine, prepares water interlayer core up and down respectively, upper cover core, pedestal core,
Entering and exhaust channel core, gate core；
Step 5: dip-coating：It will be poured into coating mixing tank by the coating of stirring, and start batch mixing jar agitator, and considered and add
Water simultaneously stirs, and comes into operation after measuring Baume degrees qualification, immerses in mixing tank core by dip-coating manipulator and starts dip-coating；It adopts
Multiple anti-lost technology is overturn with overweight sand core, monoblock type air intake duct sand core is due to being added to chromite sand, and group core is in pedestal
Overturning is only easily fallen down by gluing when dip-coating on core, other than gluing, additionally uses two side pressure core support of sand core, urgent above sand core
Gu screw, sand core side beat the multiple anti-lost measure technology of nailing；
Step 6: drying：By dip-coating complete group core be put into the core drying pallet of roller-way, into drying oven dry 80~
90min, 170-200 DEG C of drying temperature, remaining moisture content≤0.5%；
Step 7: closing core：By the upper water interlayer core print of preparation manually place asbestos washer, upper cover core group and pedestal core group into
Row closes core, and checks for exception；
Step 8: melting：Melting is carried out to the material of casting, wherein the new pig iron 10-25%, foundry return 30-45%,
Steel scrap 30-60%, obtaining ingredient is：C：3.20~3.35%, Si：1.5~1.7%, Mn：0.55~0.85%, P≤
0.06%, S：0.06~0.10%, Cu：0.4~0.6%, Cr：0.15~0.25%；
Step 9: cast：Melting material is poured into a mould into the sand core after assembling, control tapping temperature is 1450 ± 10 DEG C；Its
In, using the multi-sealed technology of cylinder cap water channel sand cores venthole, cylinder cap water channel sand cores are surrounded by molten iron, if sand core outlet is not
It is good, easily cause bleb defect, therefore, it is all that sand core outlet using sand core head places asbestos washer with holes, sand core venthole
Enclose the multi-sealed measure technology discharged pressure sand ring, place pressure sand ring around molten iron riser；
Step 10: post-processing：Subsequent processing is carried out to the cylinder cap after cast, and examines size.
As an optimization：In the step 4 coremaking, the preparation of upper and lower water interlayer uses the hot core machines of Z8640SC, control to penetrate sand
2.5~7bar of pressure, shooting time 2~7s, slow 2~15s of evacuation time, fast evacuation time≤20s, upper mold temperature in upper interlayer
It it is 260 ± 10 DEG C, lower die temperature is 250 ± 10 DEG C in upper interlayer, and upper mold temperature is 270 ± 10 DEG C in lower interlayer, in lower interlayer
Lower die temperature is 250 ± 10 DEG C, upper interlayer hardening time >=160s, lower interlayer hardening time >=170s.
As an optimization：In the step 4 coremaking, the preparation of upper cover core and pedestal core uses MLD130H core making machines, control
3~6bar of shooting pressure, 1~3s of shooting time, triethylamine 75~120ml of predetermined amount, 85~120 DEG C of amine temperature, evacuation time 3~
5s, layer 25~80s of hardening time, 4~5bar of solidifying pressure.
As an optimization：In the step 4 coremaking, the preparation of exhaust duct core uses MLC50 core making machines, controls shooting pressure 3
~6bar, 1~3s of shooting time, triethylamine 80~150ml of predetermined amount, 85~120 DEG C, 3~5s of evacuation time of amine temperature, layer solidification
25~80s of time, 4~6bar of solidifying pressure.
As an optimization：In the step 4 coremaking, the preparation of gate core uses MLC50 core making machines, and control shooting pressure 3~
6bar, 1~3s of shooting time, triethylamine 40~60ml of predetermined amount, 85~120 DEG C, 3~5s of evacuation time of amine temperature, when layer cures
Between 25~80s, 4~6bar of solidifying pressure.
Advantageous effect：The specific advantage of the present invention is as follows：
(1) present invention overturns multiple anti-lost technology using overweight sand core, and monoblock type air intake duct sand core is due to being added to
Chromite sand is overweight nearly 15Kg, group core overturn in dip-coating on pedestal core only easily to fall down by gluing, other than gluing, also using sand
Fastening screw above two side pressure core support of core, sand core, sand core side beat the multiple anti-lost measure technology of nailing.
(2) the multi-sealed technology of cylinder cap water channel sand cores venthole of the invention, cylinder cap water channel sand cores are surrounded by molten iron, if
Sand core outlet is bad, easily causes bleb defect, places asbestos washer with holes using sand core head in sand core outlet, sand core goes out
Pressure sand ring is discharged around stomata, the multi-sealed measure technologies such as pressure sand ring are placed around molten iron riser.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, so that the technology of this field
Personnel can be better understood from advantages and features of the invention, to make apparent boundary to protection scope of the present invention
It is fixed.Embodiment described in the invention is only a part of the embodiment of the present invention, instead of all the embodiments, based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, shall fall within the protection scope of the present invention.
Specific embodiment 1
A kind of production technology of 7H diesel engine cylinder covers casting, includes the following steps：
Step 1: coremaking material incoming test：According to triethylamine cold core roughing sand stock up technology requirement, to roughing sand granularity and point
Cloth, moisture amount containing mud, chemical property are tested；It is stocked up technology requirement according to triethylamine cold core roughing sand, to resin viscosity, close
Degree, intensity, gas forming amount are tested；According to foundry facing stock up technology requirement, to coating baume, density, suspension, hair
Tolerance, solid content are tested；
Step 2: feedstock processing：Roughing sand temperature is 20 DEG C, special sand temperature is 20 DEG C, resin temperature is 15 DEG C；
Step 3: mulling：Roughing sand, chromite sand and nice foundry sand, curing agent and resin are put into sand mixer and mixed,
In, weight ratio is as follows：Roughing sand 20%, chromite sand and nice foundry sand is each 35%, resin 2%, curing agent are several, the mulling time is 35
Second；
Step 4: coremaking：Mulling is put into core making machine, prepares water interlayer core up and down respectively, upper cover core, pedestal core,
Entering and exhaust channel core, gate core；
Step 5: dip-coating：It will be poured into coating mixing tank by the coating of stirring, and start batch mixing jar agitator, and considered and add
Water simultaneously stirs, and comes into operation after measuring Baume degrees qualification, immerses in mixing tank core by dip-coating manipulator and starts dip-coating；It adopts
Multiple anti-lost technology is overturn with overweight sand core, monoblock type air intake duct sand core is due to being added to chromite sand, and group core is in pedestal
Overturning is only easily fallen down by gluing when dip-coating on core, other than gluing, additionally uses two side pressure core support of sand core, urgent above sand core
Gu screw, sand core side beat the multiple anti-lost measure technology of nailing；
Step 6: drying：The group core that dip-coating is completed is put into the core drying pallet of roller-way, 80min is dried into drying oven,
170 DEG C of drying temperature, remaining moisture content≤0.5%；
Step 7: closing core：By the upper water interlayer core print of preparation manually place elastomeric pad, upper cover core group and pedestal core group into
Row closes core, and checks for exception；
Step 8: melting：Melting is carried out to the material of casting, wherein the new pig iron 10%, foundry return 30%, steel scrap
60%, obtaining ingredient is：C：3.20%, Si：1.5%, Mn：0.55%, P≤0.06%, S：0.06%, Cu：0.4%, Cr：
0.15%；
Step 9: cast：Melting material is poured into a mould into the sand core after assembling, control tapping temperature is 1440 DEG C；Wherein, it adopts
With the multi-sealed technology of cylinder cap water channel sand cores venthole, cylinder cap water channel sand cores are surrounded by molten iron, if sand core outlet is bad, Yi Yin
Casting gas hole defect is played, therefore, sand core outlet places asbestos washer with holes using sand core head, discharges pressure around sand core venthole
The multi-sealed measure technology of pressure sand ring is placed around sand ring, molten iron riser；
Step 10: post-processing：Subsequent processing is carried out to the cylinder cap after cast, and examines size.
In the step 4 coremaking, the preparation of upper and lower water interlayer uses the hot core machines of Z8640SC, controls shooting pressure
2.5bar, shooting time 2s, slow evacuation time 2s, fast evacuation time≤20s, upper mold temperature is 250 DEG C in upper interlayer, upper interlayer
Middle lower die temperature is 240 DEG C, and upper mold temperature is 260 DEG C in lower interlayer, and lower die temperature is 240 DEG C in lower interlayer, upper interlayer solidification
Time >=160s, lower interlayer hardening time >=170s.
In the step 4 coremaking, the preparation of upper cover core and pedestal core uses MLD130H core making machines, controls shooting pressure
3bar, shooting time 1s, triethylamine predetermined amount 75ml, 85 DEG C, evacuation time 3s, layer hardening time 25s of amine temperature, solidifying pressure
4bar。
In the step 4 coremaking, the preparation of exhaust duct core uses MLC50 core making machines, controls shooting pressure 3bar, penetrates sand
Time 1s, triethylamine predetermined amount 80ml, 85 DEG C, evacuation time 3s of amine temperature, layer hardening time 25s, solidifying pressure 4bar.
In the step 4 coremaking, the preparation of gate core uses MLC50 core making machines, shooting pressure 3bar is controlled, when penetrating sand
Between 1s, triethylamine predetermined amount 40ml, 85 DEG C, evacuation time 3s of amine temperature, layer hardening time 25s, solidifying pressure 4bar.
Specific embodiment 2
A kind of production technology of 7H diesel engine cylinder covers casting, includes the following steps：
Step 1: coremaking material incoming test：According to triethylamine cold core roughing sand stock up technology requirement, to roughing sand granularity and point
Cloth, moisture amount containing mud, chemical property are tested；It is stocked up technology requirement according to triethylamine cold core roughing sand, to resin viscosity, close
Degree, intensity, gas forming amount are tested；According to foundry facing stock up technology requirement, to coating baume, density, suspension, hair
Tolerance, solid content are tested；
Step 2: feedstock processing：Roughing sand temperature is 40 DEG C, special sand temperature is 40 DEG C, resin temperature is 35 DEG C；
Step 3: mulling：Roughing sand, chromite sand and nice foundry sand, curing agent and resin are put into sand mixer and mixed,
In, weight ratio is as follows：Roughing sand 20%, chromite sand and nice foundry sand is each 35%, resin 2%, curing agent are several, the mulling time is 65
Second；
Step 4: coremaking：Mulling is put into core making machine, prepares water interlayer core up and down respectively, upper cover core, pedestal core,
Entering and exhaust channel core, gate core；
Step 5: dip-coating：It will be poured into coating mixing tank by the coating of stirring, and start batch mixing jar agitator, and considered and add
Water simultaneously stirs, and comes into operation after measuring Baume degrees qualification, immerses in mixing tank core by dip-coating manipulator and starts dip-coating；It adopts
Multiple anti-lost technology is overturn with overweight sand core, monoblock type air intake duct sand core is due to being added to chromite sand, and group core is in pedestal
Overturning is only easily fallen down by gluing when dip-coating on core, other than gluing, additionally uses two side pressure core support of sand core, urgent above sand core
Gu screw, sand core side beat the multiple anti-lost measure technology of nailing；
Step 6: drying：The group core that dip-coating is completed is put into the core drying pallet of roller-way, 90min is dried into drying oven,
200 DEG C of drying temperature, remaining moisture content≤0.5%；
Step 7: closing core：By the upper water interlayer core print of preparation manually place elastomeric pad, upper cover core group and pedestal core group into
Row closes core, and checks for exception；
Step 8: melting：Melting is carried out to the material of casting, wherein the new pig iron 25%, foundry return 45%, steel scrap
30%, obtaining ingredient is：C：3.35%, Si：1.7%, Mn：0.85%, P≤0.06%, S：0.10%, Cu：0.6%, Cr：
0.25%；
Step 9: cast：Melting material is poured into a mould into the sand core after assembling, control tapping temperature is 1460 DEG C；Wherein, it adopts
With the multi-sealed technology of cylinder cap water channel sand cores venthole, cylinder cap water channel sand cores are surrounded by molten iron, if sand core outlet is bad, Yi Yin
Casting gas hole defect is played, therefore, sand core outlet places asbestos washer with holes using sand core head, discharges pressure around sand core venthole
The multi-sealed measure technology of pressure sand ring is placed around sand ring, molten iron riser；
Step 10: post-processing：Subsequent processing is carried out to the cylinder cap after cast, and examines size.
In the step 4 coremaking, the preparation of upper and lower water interlayer uses the hot core machines of Z8640SC, controls shooting pressure 7bar,
Shooting time 7s, slow evacuation time 15s, fast evacuation time≤20s, upper mold temperature is 270 DEG C in upper interlayer, lower die in upper interlayer
Temperature is 260 DEG C, and upper mold temperature is 280 DEG C in lower interlayer, and lower die temperature is 260 DEG C in lower interlayer, upper interlayer hardening time >=
160s, lower interlayer hardening time >=170s.
In the step 4 coremaking, the preparation of upper cover core and pedestal core uses MLD130H core making machines, controls shooting pressure
6bar, shooting time 3s, triethylamine predetermined amount 120ml, 120 DEG C, evacuation time 5s, layer hardening time 80s of amine temperature, solidifying pressure
5bar。
In the step 4 coremaking, the preparation of exhaust duct core uses MLC50 core making machines, controls shooting pressure 6bar, penetrates sand
Time 3s, triethylamine predetermined amount 150ml, 120 DEG C, evacuation time 5s of amine temperature, layer hardening time 80s, solidifying pressure 6bar.
In the step 4 coremaking, the preparation of gate core uses MLC50 core making machines, shooting pressure 6bar is controlled, when penetrating sand
Between 3s, triethylamine predetermined amount 60ml, 120 DEG C, evacuation time 5s of amine temperature, layer hardening time 80s, solidifying pressure 6bar.
Specific embodiment 3
A kind of production technology of 7H diesel engine cylinder covers casting, includes the following steps：
Step 1: coremaking material incoming test：According to triethylamine cold core roughing sand stock up technology requirement, to roughing sand granularity and point
Cloth, moisture amount containing mud, chemical property are tested；It is stocked up technology requirement according to triethylamine cold core roughing sand, to resin viscosity, close
Degree, intensity, gas forming amount are tested；According to foundry facing stock up technology requirement, to coating baume, density, suspension, hair
Tolerance, solid content are tested；
Step 2: feedstock processing：Roughing sand temperature is 30 ± 10 DEG C, special sand temperature is 30 DEG C, resin temperature is 25 DEG C；
Step 3: mulling：Roughing sand, chromite sand and nice foundry sand, curing agent and resin are put into sand mixer and mixed,
In, weight ratio is as follows：Roughing sand 20%, chromite sand and nice foundry sand is each 35%, resin 2%, curing agent are several, the mulling time is 58
Second；
Step 4: coremaking：Mulling is put into core making machine, prepares water interlayer core up and down respectively, upper cover core, pedestal core,
Entering and exhaust channel core, gate core；
Step 5: dip-coating：It will be poured into coating mixing tank by the coating of stirring, and start batch mixing jar agitator, and considered and add
Water simultaneously stirs, and comes into operation after measuring Baume degrees qualification, immerses in mixing tank core by dip-coating manipulator and starts dip-coating；It adopts
Multiple anti-lost technology is overturn with overweight sand core, monoblock type air intake duct sand core is due to being added to chromite sand, and group core is in pedestal
Overturning is only easily fallen down by gluing when dip-coating on core, other than gluing, additionally uses two side pressure core support of sand core, urgent above sand core
Gu screw, sand core side beat the multiple anti-lost measure technology of nailing；
Step 6: drying：The group core that dip-coating is completed is put into the core drying pallet of roller-way, 87min is dried into drying oven,
180 DEG C of drying temperature, remaining moisture content≤0.5%；
Step 7: closing core：By the upper water interlayer core print of preparation manually place asbestos washer, upper cover core group and pedestal core group into
Row closes core, and checks for exception；
Step 8: melting：Melting is carried out to the material of casting, wherein the new pig iron 15%, foundry return 35%, steel scrap
50%, obtaining ingredient is：C：3.27%, Si：1.6%, Mn：0.65%, P≤0.06%, S：0.09%, Cu：0.5%, Cr：
0.19%；
Step 9: cast：Melting material is poured into a mould into the sand core after assembling, control tapping temperature is 1450 DEG C；Wherein, it adopts
With the multi-sealed technology of cylinder cap water channel sand cores venthole, cylinder cap water channel sand cores are surrounded by molten iron, if sand core outlet is bad, Yi Yin
Casting gas hole defect is played, therefore, sand core outlet places asbestos washer with holes using sand core head, discharges pressure around sand core venthole
The multi-sealed measure technology of pressure sand ring is placed around sand ring, molten iron riser；
Step 10: post-processing：Subsequent processing is carried out to the cylinder cap after pouring, and examines size.
In the step 4 coremaking, the preparation of upper and lower water interlayer uses the hot core machines of Z8640SC, controls shooting pressure 5bar,
Shooting time 4s, slow evacuation time 12s, fast evacuation time≤20s, upper mold temperature is 260 DEG C in upper interlayer, lower die in upper interlayer
Temperature is 250 DEG C, and upper mold temperature is 270 DEG C in lower interlayer, and lower die temperature is 250 DEG C in lower interlayer, upper interlayer hardening time >=
160s, lower interlayer hardening time >=170s.
In the step 4 coremaking, the preparation of upper cover core and pedestal core uses MLD130H core making machines, controls shooting pressure
5bar, shooting time 2s, triethylamine predetermined amount 90ml, 110 DEG C, evacuation time 4s, layer hardening time 40s of amine temperature, solidifying pressure
4bar。
In the step 4 coremaking, the preparation of exhaust duct core uses MLC50 core making machines, controls shooting pressure 5bar, penetrates sand
Time 2s, triethylamine predetermined amount 110ml, 105 DEG C, evacuation time 4s of amine temperature, layer hardening time 65s, solidifying pressure 5bar.
In the step 4 coremaking, the preparation of gate core uses MLC50 core making machines, shooting pressure 4bar is controlled, when penetrating sand
Between 2s, triethylamine predetermined amount 50ml, 100 DEG C, evacuation time 4s of amine temperature, layer hardening time 45s, solidifying pressure 5bar.
The present invention overturns multiple anti-lost technology using overweight sand core, and monoblock type air intake duct sand core is due to being added to ferrochrome
Ore in sand form is overweight nearly 15Kg, group core overturn in dip-coating on pedestal core only easily to fall down by gluing, other than gluing, also using sand core two
Fastening screw above side pressure core support, sand core, sand core side beat the multiple anti-lost measure technology of nailing.
The multi-sealed technology of cylinder cap water channel sand cores venthole of the present invention, cylinder cap water channel sand cores are surrounded by molten iron, if sand
Core outlet is bad, easily causes bleb defect, and asbestos washer with holes, sand core outlet are placed using sand core head in sand core outlet
Pressure sand ring is discharged around hole, the multi-sealed measure technologies such as pressure sand ring are placed around molten iron riser.
Claims (5)
1. a kind of production technology of 7H diesel engine cylinder covers casting, it is characterised in that：Include the following steps：
Step 1: coremaking material incoming test：Stocked up technology requirement according to triethylamine cold core roughing sand, to roughing sand granularity and distribution,
Moisture amount containing mud, chemical property are tested；It is stocked up technology requirement according to triethylamine cold core roughing sand, to resin viscosity, density, strong
Degree, gas forming amount are tested；According to foundry facing stock up technology requirement, to coating baume, density, suspension, gas forming amount,
Solid content is tested；
Step 2: feedstock processing：Roughing sand temperature is 30 ± 10 DEG C, special sand temperature is 30 ± 10 DEG C, resin temperature is 25 ± 10
℃；
Step 3: mulling：Roughing sand, chromite sand and nice foundry sand, curing agent and resin are put into sand mixer and mixed, wherein weight
It is as follows to measure ratio：Roughing sand 20%, chromite sand and nice foundry sand is each 35%, resin 2%, curing agent are several, the mulling time is 35-65
Second；
Step 4: coremaking：Mulling is put into core making machine, prepares water interlayer core up and down, upper cover core, pedestal core, into row respectively
Airway core, gate core；
Step 5: dip-coating：It will be poured into coating mixing tank by the coating of stirring, and start batch mixing jar agitator, and considered and add water simultaneously
Stirring is come into operation after measuring Baume degrees qualification, is immersed in mixing tank core by dip-coating manipulator and is started dip-coating；Using super
Heavy sand core overturns multiple anti-lost technology, and monoblock type air intake duct sand core is due to being added to chromite sand, and group core is on pedestal core
Overturning is only easily fallen down by gluing when dip-coating, other than gluing, additionally uses two side pressure core support of sand core, fastening spiral shell above sand core
Nail, sand core side beat the multiple anti-lost measure technology of nailing；
Step 6: drying：The group core that dip-coating is completed is put into the core drying pallet of roller-way, 80~90min is dried into drying oven,
170-200 DEG C of drying temperature, remaining moisture content≤0.5%；
Step 7: closing core：The upper water interlayer core print of preparation is manually placed into asbestos washer, upper cover core group and pedestal core group are closed
Core, and check for exception；
Step 8: melting：Melting is carried out to the material of casting, wherein new pig iron 10-25%, foundry return 30-45%, steel scrap
30-60%, obtaining ingredient is：C：3.20~3.35%, Si：1.5~1.7%, Mn：0.55~0.85%, P≤0.06%, S：
0.06~0.10%, Cu：0.4~0.6%, Cr：0.15~0.25%；
Step 9: cast：Melting material is poured into a mould into the sand core after assembling, control tapping temperature is 1450 ± 10 DEG C；Wherein, it adopts
With the multi-sealed technology of cylinder cap water channel sand cores venthole, cylinder cap water channel sand cores are surrounded by molten iron, if sand core outlet is bad, Yi Yin
Casting gas hole defect is played, therefore, sand core outlet places asbestos washer with holes using sand core head, discharges pressure around sand core venthole
The multi-sealed measure technology of pressure sand ring is placed around sand ring, molten iron riser；
Step 10: post-processing：Subsequent processing is carried out to the cylinder cap after pouring, and examines size.
2. the production technology of 7H diesel engine cylinder covers casting according to claim 1, it is characterised in that：The step 4 coremaking
In, the preparation of upper and lower water interlayer uses the hot core machines of Z8640SC, controls 2.5~7bar of shooting pressure, 2~7s of shooting time, slow to arrange
2~15s of gas time, fast evacuation time≤20s, upper mold temperature is 260 ± 10 DEG C in upper interlayer, and lower die temperature is in upper interlayer
250 ± 10 DEG C, upper mold temperature is 270 ± 10 DEG C in lower interlayer, and lower die temperature is 250 ± 10 DEG C in lower interlayer, upper interlayer solidification
Time >=160s, lower interlayer hardening time >=170s.
3. the production technology of 7H diesel engine cylinder covers casting according to claim 1, it is characterised in that：The step 4 coremaking
In, the preparation of upper cover core and pedestal core uses MLD130H core making machines, controls 3~6bar of shooting pressure, shooting time 1~3s, and three
Ethamine 75~120ml of predetermined amount, 85~120 DEG C, 3~5s of evacuation time, layer 25~80s of hardening time of amine temperature, solidifying pressure 4~
5bar。
4. the production technology of 7H diesel engine cylinder covers casting according to claim 1, it is characterised in that：The step 4 coremaking
In, the preparation of exhaust duct core uses MLC50 core making machines, controls 3~6bar of shooting pressure, 1~3s of shooting time, and triethylamine makes a reservation for
Measure 80~150ml, 85~120 DEG C, 3~5s of evacuation time of amine temperature, layer 25~80s of hardening time, 4~6bar of solidifying pressure.
5. the production technology of 7H diesel engine cylinder covers casting according to claim 1, it is characterised in that：The step 4 coremaking
In, the preparation of gate core uses MLC50 core making machines, controls 3~6bar of shooting pressure, 1~3s of shooting time, triethylamine predetermined amount
40~60ml, 85~120 DEG C, 3~5s of evacuation time of amine temperature, layer 25~80s of hardening time, 4~6bar of solidifying pressure.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332597A (en) * | 2018-10-18 | 2019-02-15 | 四川省犍为恒益铝业有限公司 | A kind of the sand core mounting structure and its installation method of automobile-used cabinet |
| CN109676090A (en) * | 2019-01-17 | 2019-04-26 | 上柴动力海安有限公司 | A kind of production technology of 7H diesel-engine body casting |
| CN109702139A (en) * | 2019-01-17 | 2019-05-03 | 上柴动力海安有限公司 | A kind of formula and technique of half wet film coating sand |
| CN109732035A (en) * | 2019-02-19 | 2019-05-10 | 上柴动力海安有限公司 | A kind of manufacturing process of diesel engine |
| CN110014125A (en) * | 2019-05-23 | 2019-07-16 | 昆明云内动力股份有限公司 | The cast structure of diesel engine cylinder block cored technique sand core combination |
| CN113560500A (en) * | 2021-07-07 | 2021-10-29 | 上柴动力海安有限公司 | Diesel engine cylinder cover casting air inlet duct integral core and manufacturing process thereof |
| CN114951557A (en) * | 2022-06-02 | 2022-08-30 | 中国第一汽车股份有限公司 | Cylinder cover casting preparation device and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909229A (en) * | 2013-01-09 | 2014-07-09 | 广西玉柴机器股份有限公司 | Diesel engine cylinder cover casting process |
-
2018
- 2018-04-24 CN CN201810375219.8A patent/CN108660365A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909229A (en) * | 2013-01-09 | 2014-07-09 | 广西玉柴机器股份有限公司 | Diesel engine cylinder cover casting process |
Non-Patent Citations (1)
| Title |
|---|
| 于苏杭等: "三乙胺法冷芯盒制芯工艺的应用", 《现代铸铁》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109332597A (en) * | 2018-10-18 | 2019-02-15 | 四川省犍为恒益铝业有限公司 | A kind of the sand core mounting structure and its installation method of automobile-used cabinet |
| CN109332597B (en) * | 2018-10-18 | 2020-04-28 | 四川省犍为恒益铝业有限公司 | Sand core mounting structure of vehicle box body and mounting method thereof |
| CN109676090A (en) * | 2019-01-17 | 2019-04-26 | 上柴动力海安有限公司 | A kind of production technology of 7H diesel-engine body casting |
| CN109702139A (en) * | 2019-01-17 | 2019-05-03 | 上柴动力海安有限公司 | A kind of formula and technique of half wet film coating sand |
| CN109732035A (en) * | 2019-02-19 | 2019-05-10 | 上柴动力海安有限公司 | A kind of manufacturing process of diesel engine |
| CN110014125A (en) * | 2019-05-23 | 2019-07-16 | 昆明云内动力股份有限公司 | The cast structure of diesel engine cylinder block cored technique sand core combination |
| CN113560500A (en) * | 2021-07-07 | 2021-10-29 | 上柴动力海安有限公司 | Diesel engine cylinder cover casting air inlet duct integral core and manufacturing process thereof |
| CN114951557A (en) * | 2022-06-02 | 2022-08-30 | 中国第一汽车股份有限公司 | Cylinder cover casting preparation device and method |
| CN114951557B (en) * | 2022-06-02 | 2024-04-16 | 中国第一汽车股份有限公司 | Cylinder cover casting preparation device and method |
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