CN104226914A - Foundry technology of flange - Google Patents
Foundry technology of flange Download PDFInfo
- Publication number
- CN104226914A CN104226914A CN201410430798.3A CN201410430798A CN104226914A CN 104226914 A CN104226914 A CN 104226914A CN 201410430798 A CN201410430798 A CN 201410430798A CN 104226914 A CN104226914 A CN 104226914A
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- flange
- mould
- sand
- temperature
- casting technique
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- 238000005516 engineering process Methods 0.000 title abstract description 5
- 239000004576 sand Substances 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 239000003110 molding sand Substances 0.000 claims abstract description 21
- 238000007670 refining Methods 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 244000035744 Hura crepitans Species 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 51
- 238000005266 casting Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 21
- 235000019353 potassium silicate Nutrition 0.000 claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000440 bentonite Substances 0.000 claims description 10
- 229910000278 bentonite Inorganic materials 0.000 claims description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- ZTFZSHLWORMEHO-UHFFFAOYSA-A pentaaluminum;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O.[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O.[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O ZTFZSHLWORMEHO-UHFFFAOYSA-A 0.000 claims description 10
- 239000005011 phenolic resin Substances 0.000 claims description 10
- 229920001568 phenolic resin Polymers 0.000 claims description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims description 10
- 239000011574 phosphorus Substances 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229920002545 silicone oil Polymers 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- -1 6 parts Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 201000001371 inclusion conjunctivitis Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000009716 squeeze casting Methods 0.000 description 1
- 206010044325 trachoma Diseases 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a foundry technology of a flange. The foundry technology comprises the following steps: (1) smelting, namely, putting steel into an electric furnace for smelting, feeding a refining agent when the temperature rises to 1600-1700 DEG C, and refining for 15-20 minutes to obtain molten steel; (2) preparing a mould, namely, manufacturing a flange mould according to the needed size; putting the flange mould into a molding sand box to obtain a sand mould; drying the sand mould for 10-15 minutes at the temperature of 600-700 DEG C, and then cooling to 350-380 DEG C for later use; (3) pouring, namely, pouring the molten steel obtained in the step (1) into the sand mould obtained in the step (2) for 25-30s at the temperature of 1450-1550 DEG C, and carrying out heat preservation for 20-25 minutes after pouring; and (4) cooling, namely, taking out the molded flange when the molded flange is cooled to the room temperature, cleaning the surface of the molded flange, and polishing to obtain the flange.
Description
Technical field
The present invention relates to a kind of casting technique of flange, belong to foundary industry technical field.
Background technology
Flange is again ring flange or bead, it is interconnective part between pipe and pipe, can be used for the connection between pipe end, also the equipment that can be used on is imported and exported, for the connection between two preparations, for the casting of above-mentioned ring flange, first be the casting for this ring flange blank, the material of general ring flange blank is aluminium alloy, the main casting mould of integral concave mould that adopts carries out manufacture ring flange blank at present, the surface quality of squeeze casting can be ensured, utilize cope match-plate pattern lever and lower push rod discharging, active force uniform and stable; But there is tissue looseness, the defect such as pore, trachoma; And existing forging processing method manufactures flange, although the flange quality produced is better, interior tissue is even, there is not the pore in foundry goods, the injurous defect such as to be mingled with, but production equipment is complicated, high to quality requirements of raw materials, utilization rate of raw materials is lower, and waste is serious, and production cost is higher.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of casting technique of flange is provided.
The present invention is achieved through the following technical solutions:
A casting technique for flange, comprises following step:
(1) melting: steel are placed in electric furnace melting, treat that temperature rises to as 1600-1700 DEG C, add refining agent, refining 15-20min, obtains molten steel, in molten steel, sulfur content is less than 0.02%, phosphorus content is less than 0.02%, and phosphorus content is 0.05-0.08%, silicon content 0.2-0.25%, manganese content 0.35-0.45%, nickel content 0.15-0.25%;
(2) mould prepares: manufacturing flange mould, and described flange mould makes according to required size, and flange mould is put into molding sand box, obtain sand mold, be under the condition of 600-700 DEG C in temperature by sand mold, dry 10-15min, be cooled to subsequently 350-380 DEG C for subsequent use;
(3) pour into a mould: by the pouring molten steel in step (1) in the sand mold in step (2), pouring temperature is 1450-1550 DEG C, and the duration of pouring is 25-30s, after casting complete, insulation 20-25min;
(4) cool: to be cooled to normal temperature, take out shaping flange, effects on surface is cleared up, and obtains flange after polishing.
The casting technique of described a kind of flange, described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, waterglass 6-8 part, water 12-16 part, phenolic resins 3-6 part, silicone oil 1-4 part, bentonite 10-12 part and aluminium triphosphate 2-4 part.
The casting technique of described a kind of flange, the weight ratio of described waterglass and water is 1:2.
The casting technique of described a kind of flange, described molding sand is obtained by following steps: after waterglass and water fully being mixed, add silica sand, phenolic resins, silicone oil and bentonite according to parts by weight and stir 80-100min, finally adding aluminium triphosphate stirring 2-3min can obtain molding sand.
The casting technique of described a kind of flange, the addition of described refining agent is the 0.5-1.2% of Metal Weight.
The casting technique of described a kind of flange, described sand mold skin is coated with high-temperature resistant coating.
The beneficial effect that the present invention reaches:
Casting technique of the present invention adopts steel as primary raw material, improve the hardness of flange itself, the flange mould obtained by sand mold, direct pouring is shaping, operation is less, reduce cost of manufacture, be cast in the uniformity that 25-30s ensure that cast, reduce pore, steel utilization ratio is high, the flange surface obtained is smooth, and cracking breakout is low, and hardness is high.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Embodiment 1
In the present embodiment, a kind of casting technique of flange, comprises following step:
(1) melting: steel are placed in electric furnace melting, treating that temperature rises to is 1700 DEG C, adds refining agent, and the addition of refining agent is 1.2% of Metal Weight, refining 20min, obtain molten steel, in molten steel, sulfur content is less than 0.02%, and phosphorus content is less than 0.02%, phosphorus content is 0.05%, silicon content 0.25%, manganese content 0.45%, nickel content 0.25%;
(2) mould prepares: manufacturing flange mould, and described flange mould makes according to required size, and flange mould is put into molding sand box, obtain sand mold, sand mold skin is coated with high-temperature resistant coating, is under the condition of 700 DEG C by sand mold in temperature, dry 15min, be cooled to subsequently 380 DEG C for subsequent use;
(3) pour into a mould: by the pouring molten steel in step (1) in the sand mold in step (2), pouring temperature is 1550 DEG C, and the duration of pouring is 30s, after casting complete, insulation 25min;
(4) cool: to be cooled to normal temperature, take out shaping flange, effects on surface is cleared up, and obtains flange after polishing.
Described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, waterglass 6 parts, 12 parts, water, 6 parts, phenolic resins, silicone oil 1 part, bentonite 12 parts and aluminium triphosphate 2 parts.Described molding sand is obtained by following steps: after waterglass and water fully being mixed, and adds silica sand, phenolic resins, silicone oil and bentonite stir 100min according to parts by weight, and finally adding aluminium triphosphate stirring 3min can obtain molding sand.
Embodiment 2
In the present embodiment, a kind of casting technique of flange, comprises following step:
(1) melting: steel are placed in electric furnace melting, treating that temperature rises to is 1600 DEG C, adds refining agent, and the addition of refining agent is 0.5% of Metal Weight, refining 15min, obtain molten steel, in molten steel, sulfur content is less than 0.02%, and phosphorus content is less than 0.02%, phosphorus content is 0.08%, silicon content 0.2%, manganese content 0.35%, nickel content 0.15%;
(2) mould prepares: manufacturing flange mould, and described flange mould makes according to required size, and flange mould is put into molding sand box, obtain sand mold, sand mold skin is coated with high-temperature resistant coating, is under the condition of 600 DEG C by sand mold in temperature, dry 10min, be cooled to subsequently 350 DEG C for subsequent use;
(3) pour into a mould: by the pouring molten steel in step (1) in the sand mold in step (2), pouring temperature is 1450 DEG C, and the duration of pouring is 25s, after casting complete, insulation 20min;
(4) cool: to be cooled to normal temperature, take out shaping flange, effects on surface is cleared up, and obtains flange after polishing.
Described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, waterglass 8 parts, 16 parts, water, 3 parts, phenolic resins, silicone oil 4 parts, bentonite 10 parts and aluminium triphosphate 4 parts.The casting technique of described a kind of flange, described molding sand is obtained by following steps: after waterglass and water fully being mixed, add silica sand, phenolic resins, silicone oil and bentonite according to parts by weight and stir 90min, finally adding aluminium triphosphate stirring 2min can obtain molding sand.
Embodiment 3
In the present embodiment, a kind of casting technique of flange, comprises following step:
(1) melting: steel are placed in electric furnace melting, treating that temperature rises to is 1650 DEG C, adds refining agent, and the addition of refining agent is 0.8% of Metal Weight, refining 18min, obtain molten steel, in molten steel, sulfur content is less than 0.02%, and phosphorus content is less than 0.02%, phosphorus content is 0.06%, silicon content 0.22%, manganese content 0.35%, nickel content 0.25%;
(2) mould prepares: manufacturing flange mould, and described flange mould makes according to required size, and flange mould is put into molding sand box, obtain sand mold, sand mold skin is coated with high-temperature resistant coating, is under the condition of 660 DEG C by sand mold in temperature, dry 13min, be cooled to subsequently 360 DEG C for subsequent use;
(3) pour into a mould: by the pouring molten steel in step (1) in the sand mold in step (2), pouring temperature is 1500 DEG C, and the duration of pouring is 30s, after casting complete, insulation 20min;
(4) cool: to be cooled to normal temperature, take out shaping flange, effects on surface is cleared up, and obtains flange after polishing.
The casting technique of described a kind of flange, described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, waterglass 7 parts, 14 parts, water, 5 parts, phenolic resins, silicone oil 3 parts, bentonite 10 parts and aluminium triphosphate 3 parts.Described molding sand is obtained by following steps: after waterglass and water fully being mixed, and adds silica sand, phenolic resins, silicone oil and bentonite stir 100min according to parts by weight, and finally adding aluminium triphosphate stirring 3min can obtain molding sand.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (6)
1. a casting technique for flange, is characterized in that, comprises following step:
(1) melting: steel are placed in electric furnace melting, treat that temperature rises to as 1600-1700 DEG C, add refining agent, refining 15-20min, obtains molten steel, in molten steel, sulfur content is less than 0.02%, phosphorus content is less than 0.02%, and phosphorus content is 0.05-0.08%, silicon content 0.2-0.25%, manganese content 0.35-0.45%, nickel content 0.15-0.25%;
(2) mould prepares: manufacturing flange mould, and described flange mould makes according to required size, and flange mould is put into molding sand box, obtain sand mold, be under the condition of 600-700 DEG C in temperature by sand mold, dry 10-15min, be cooled to subsequently 350-380 DEG C for subsequent use;
(3) pour into a mould: by the pouring molten steel in step (1) in the sand mold in step (2), pouring temperature is 1450-1550 DEG C, and the duration of pouring is 25-30s, after casting complete, insulation 20-25min;
(4) cool: to be cooled to normal temperature, take out shaping flange, effects on surface is cleared up, and obtains flange after polishing.
2. the casting technique of a kind of flange according to claim 1, it is characterized in that, described molding sand is made up of the raw material of following parts by weight: silica sand 100 parts, waterglass 6-8 part, water 12-16 part, phenolic resins 3-6 part, silicone oil 1-4 part, bentonite 10-12 part and aluminium triphosphate 2-4 part.
3. the casting technique of a kind of flange according to claim 2, is characterized in that, the weight ratio of described waterglass and water is 1:2.
4. the casting technique of a kind of flange according to Claims 2 or 3, it is characterized in that, described molding sand is obtained by following steps: after waterglass and water fully being mixed, add silica sand, phenolic resins, silicone oil and bentonite according to parts by weight and stir 80-100min, finally adding aluminium triphosphate stirring 2-3min can obtain molding sand.
5. the casting technique of a kind of flange according to claim 1, is characterized in that, the addition of described refining agent is the 0.5-1.2% of Metal Weight.
6. the casting technique of a kind of flange according to claim 1, is characterized in that, described sand mold skin is coated with high-temperature resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410430798.3A CN104226914B (en) | 2014-08-29 | 2014-08-29 | A kind of casting technique of flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410430798.3A CN104226914B (en) | 2014-08-29 | 2014-08-29 | A kind of casting technique of flange |
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| Publication Number | Publication Date |
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| CN104226914A true CN104226914A (en) | 2014-12-24 |
| CN104226914B CN104226914B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410430798.3A Active CN104226914B (en) | 2014-08-29 | 2014-08-29 | A kind of casting technique of flange |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959521A (en) * | 2015-07-02 | 2015-10-07 | 无锡阳工机械制造有限公司 | Valve casing casting process |
| CN105081229A (en) * | 2015-08-28 | 2015-11-25 | 桂林昌鑫机械制造有限公司 | Casting process for crankshaft |
| CN105081223A (en) * | 2015-08-05 | 2015-11-25 | 宁夏苏宁新能源设备有限公司 | Casting molding technology of middle groove shovel plate stopping ledge |
| CN105695848A (en) * | 2015-11-29 | 2016-06-22 | 郑臣钏 | Flange casting process |
| CN106001452A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Brake drum casting process |
| CN106001450A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Cylinder sleeve casting technology |
| CN106111913A (en) * | 2016-06-30 | 2016-11-16 | 娄土岭 | A kind of flange casting technique |
| CN107083518A (en) * | 2017-06-20 | 2017-08-22 | 合肥博创机械制造有限公司 | A kind of casting technique of steel alloy valve |
| CN107214298A (en) * | 2017-06-22 | 2017-09-29 | 霍山县忠福机电科技有限公司 | A kind of high pressure draining valve shell casting technique |
| CN107716844A (en) * | 2017-09-29 | 2018-02-23 | 吴江市液铸液压件铸造有限公司 | A kind of processing technology of automobile output shaft casting |
| CN107790643A (en) * | 2017-09-29 | 2018-03-13 | 吴江市液铸液压件铸造有限公司 | A kind of multi-way valve body liquid casts hydraulic part |
| CN107790639A (en) * | 2017-09-29 | 2018-03-13 | 吴江市液铸液压件铸造有限公司 | A kind of processing technology of spherical end cover casting |
| CN108284199A (en) * | 2018-01-13 | 2018-07-17 | 合肥市瑞宏重型机械有限公司 | A kind of efficient casting technique of the simple vertical grinding roll cover of moulding |
| CN109454201A (en) * | 2018-11-20 | 2019-03-12 | 吴江市格瑞福金属制品有限公司 | A kind of processing method of cast iron stove |
| CN109465389A (en) * | 2018-11-20 | 2019-03-15 | 吴江市格瑞福金属制品有限公司 | A kind of preparation process of baking tray |
| CN110425257A (en) * | 2019-07-30 | 2019-11-08 | 江苏胜牌科技有限公司 | A kind of Novel gearbox output end |
| CN112317687A (en) * | 2020-10-27 | 2021-02-05 | 周明洁 | Processing technology of casting |
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| CN103949611A (en) * | 2014-01-15 | 2014-07-30 | 洛阳轴研科技股份有限公司 | Casting method of open slot copper rotor of electric main shaft |
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| CN101003084A (en) * | 2007-01-09 | 2007-07-25 | 辽宁福鞍铸业集团有限公司 | Production of large and super-critical steel-casting by using alkali phenolic aldehyde resin art |
| RU2427444C1 (en) * | 2010-05-20 | 2011-08-27 | Открытое Акционерное Общество "Российские Железные Дороги" | Method of producing piston rings and cylinder sleeve billets |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959521A (en) * | 2015-07-02 | 2015-10-07 | 无锡阳工机械制造有限公司 | Valve casing casting process |
| CN105081223A (en) * | 2015-08-05 | 2015-11-25 | 宁夏苏宁新能源设备有限公司 | Casting molding technology of middle groove shovel plate stopping ledge |
| CN105081229A (en) * | 2015-08-28 | 2015-11-25 | 桂林昌鑫机械制造有限公司 | Casting process for crankshaft |
| CN105695848A (en) * | 2015-11-29 | 2016-06-22 | 郑臣钏 | Flange casting process |
| CN106001452A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Brake drum casting process |
| CN106001450A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Cylinder sleeve casting technology |
| CN106111913A (en) * | 2016-06-30 | 2016-11-16 | 娄土岭 | A kind of flange casting technique |
| CN107083518A (en) * | 2017-06-20 | 2017-08-22 | 合肥博创机械制造有限公司 | A kind of casting technique of steel alloy valve |
| CN107214298A (en) * | 2017-06-22 | 2017-09-29 | 霍山县忠福机电科技有限公司 | A kind of high pressure draining valve shell casting technique |
| CN107716844A (en) * | 2017-09-29 | 2018-02-23 | 吴江市液铸液压件铸造有限公司 | A kind of processing technology of automobile output shaft casting |
| CN107790643A (en) * | 2017-09-29 | 2018-03-13 | 吴江市液铸液压件铸造有限公司 | A kind of multi-way valve body liquid casts hydraulic part |
| CN107790639A (en) * | 2017-09-29 | 2018-03-13 | 吴江市液铸液压件铸造有限公司 | A kind of processing technology of spherical end cover casting |
| CN108284199A (en) * | 2018-01-13 | 2018-07-17 | 合肥市瑞宏重型机械有限公司 | A kind of efficient casting technique of the simple vertical grinding roll cover of moulding |
| CN109454201A (en) * | 2018-11-20 | 2019-03-12 | 吴江市格瑞福金属制品有限公司 | A kind of processing method of cast iron stove |
| CN109465389A (en) * | 2018-11-20 | 2019-03-15 | 吴江市格瑞福金属制品有限公司 | A kind of preparation process of baking tray |
| CN110425257A (en) * | 2019-07-30 | 2019-11-08 | 江苏胜牌科技有限公司 | A kind of Novel gearbox output end |
| CN112317687A (en) * | 2020-10-27 | 2021-02-05 | 周明洁 | Processing technology of casting |
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| Publication number | Publication date |
|---|---|
| CN104226914B (en) | 2016-07-06 |
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