CN102151790A - Investment casting method of heavy castings - Google Patents
Investment casting method of heavy castings Download PDFInfo
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- CN102151790A CN102151790A CN 201010110103 CN201010110103A CN102151790A CN 102151790 A CN102151790 A CN 102151790A CN 201010110103 CN201010110103 CN 201010110103 CN 201010110103 A CN201010110103 A CN 201010110103A CN 102151790 A CN102151790 A CN 102151790A
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Abstract
The invention discloses an investment casting method of heavy castings, which comprises the following steps that: when a mold is designed, the filling speed of cerate into the cavity of the mold needs to be taken into account, and three wax filling ports needs to be arranged; when a wax mold is produced, two wax filling machines are adopted for filling wax to ensure the surface finish; a casting head and a casting are coated respectively, and the casting head and the casting are not assembled; after being coated for five times, a mold shell is fixed integrally by iron wires and then coated, and fixed for the second time after being coated for ten times and then coated; the casting head and the mold shell are roasted separately, and the mold shell is pre-roasted by a chamber type electric resistance furnace and insulated for two hours; the separately coated casting head is spliced with the casting by red mud; a movable roasting furnace is used for secondary roasting to the mold shell to meet the requirement of pouring in steel making; argon is used for protection in the steel making process, and the steel is poured when the steel temperature reaches the required temperature of refining; and the mold shell is cleaned, and the casting head is cut off. The investment casting method of heavy castings shortens the production cycle of the castings, and has higher size precision.
Description
Technical field
The present invention relates to a kind of casting method of foundry goods, particularly relate to a kind of investment casting method of big foundry goods.
Background technology
All the time, casting industry all can not be realized smart casting to big foundry goods (500Kg above foundry goods) or realize that smart casting but can not normal running and feel put about, precision castings and the contrast of sand foundry goods, precision castings can reach high dimension precision, surface quality and less allowance preferably, but, the process-cycle of now big foundry goods is long, and precision is low.
Summary of the invention
Technical problem to be solved by this invention provides a kind of investment casting method of big foundry goods, and it has shortened the foundry goods fabrication cycle, and higher accuracy to size is arranged.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of investment casting method of big foundry goods is characterized in that it may further comprise the steps:
Step 1: should be taken into account the filling velocity of slack wax in mold cavity during the mould design, so need offer three casting mouths;
Step 2: adopt the casting simultaneously of two wax injectors when wax-pattern is made, guarantee surface smoothness;
Step 3: dead head and foundry goods are separated coating, and dead head and foundry goods itself are not assembled;
Step 4: coat at formwork and formwork to be reinforced after five times, continue coating after using the iron wire integral reinforcing, carry out reinforcing second time back continuation coating after the coating to ten time;
Step 5: chamber type electric resistance furnace insulation two hours is used in dead head and formwork split roasting, formwork preroast;
Step 6: dead head behind the split coating and foundry goods are spliced with red soil;
Step 7: use removable roaster that formwork is carried out after baking to reach the requirement of pouring in steel smelting;
Step 8: use argon shield in the steelmaking process, the steel temperature is poured into a mould after reaching refining requirement temperature;
Step 9: the cleaning formwork also excises dead head.
Preferably, described step 1 is the mould design procedure, step 2 is the wax-pattern making step, step 3 is the wax-pattern number of assembling steps, and step 4 is a formwork coating step, and step 5 is a formwork preroast step, step 6 is a formwork splicing step, step 7 is a formwork after baking step, and step 8 is the pouring in steel smelting step, and step 9 is the formwork cleanup step.
Preferably, described mould adopts the casting mould.
Positive progressive effect of the present invention is: the present invention realizes that to big foundry goods precision-investment casting obtains surface quality preferably, less technology cutting output and higher accuracy to size, reduced workload, shortened the foundry goods fabrication cycle, reduced the casting cost and improved the foundry goods total quality.
Description of drawings
Fig. 1 is the flow chart of the investment casting method of the big foundry goods of the present invention.
The specific embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As shown in Figure 1, the investment casting method of the big foundry goods of the present invention may further comprise the steps:
Step 1: mould design, mould does not use the founding wooden model, and use general casting mould, should be taken into account the filling velocity of slack wax in mold cavity during the mould design, so need offer three casting mouths, wherein two casting confession wax injector castings are used, and another one casting mouth is as the deflation effect, prevent because of gas in the mould can't get rid of annotate discontented.
Step 2: wax-pattern is made, and adopts the casting simultaneously of two wax injectors when wax-pattern is made, and guarantees surface smoothness.Because the volume of foundry goods is bigger, the heavy bad fortune of turning over of weight can be used hair-dryer and gauze to wipe while blowing and repair the wax-pattern surface flow marks when repairing wax.
Step 3: the wax-pattern assembling, dead head and foundry goods are separated coating, dead head and foundry goods itself are not assembled, to increase operating flexibility.
Step 4: formwork coating, coat 5-6 back at formwork formwork is reinforced, continue coating after using the iron wire integral reinforcing, carry out reinforcing second time the back after the coating to 10 time and continue coating with raising formwork bulk strength.
Step 5: formwork preroast, dead head and formwork split roasting, formwork preroast use chamber type electric resistance furnace to be incubated 2 hours in 900 ℃, cooling then, the formwork that cooling is good takes out in chamber type electric resistance furnace.
Step 6: the formwork splicing, dead head behind the split coating and foundry goods are spliced with red soil, blow foreign material such as the inner knockout of formwork off with compressed air, use red soil foundry goods and the dead head that roasting is good to be stitched together, prevent knockout during operation; Foundry goods and dead head are removed inner foreign material with compressed air or dust catcher after splicing well again.
Step 7: formwork after baking, use removable roaster that formwork is carried out after baking to reach the requirement of pouring in steel smelting, note position and sintering temperature that formwork is placed during roasting, the formwork placement location should be good between two parties and formwork is heated evenly generally speaking, and sintering temperature is controlled at and is visually dark red for good.
Step 8: pouring in steel smelting, use argon shield in the steelmaking process, the steel temperature is poured into a mould after reaching refining requirement temperature.The concrete steps of pouring in steel smelting are to use asbestos to cover the intermediate frequency fire door and carry out the fire door blowing argon gas during molten steel melts, treat to begin steel-making, slag making and deoxidation after the steel temperature arrives refining requirement temperature, tapping temperature is decided on material, and general the requirement exceeds 40-50 ℃ than pouring temperature.
Step 9: the formwork cleaning, the cleaning formwork also excises dead head.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these embodiments.Therefore, protection scope of the present invention is limited by appended claims.
Claims (3)
1. the investment casting method of a big foundry goods is characterized in that, it may further comprise the steps:
Step 1: should be taken into account the filling velocity of slack wax in mold cavity during the mould design, so need offer three casting mouths;
Step 2: adopt the casting simultaneously of two wax injectors when wax-pattern is made, guarantee surface smoothness;
Step 3: dead head and foundry goods are separated coating, and dead head and foundry goods itself are not assembled;
Step 4: coat at formwork and formwork to be reinforced after five times, continue coating after using the iron wire integral reinforcing, carry out reinforcing second time back continuation coating after the coating to ten time;
Step 5: chamber type electric resistance furnace insulation two hours is used in dead head and formwork split roasting, formwork preroast;
Step 6: dead head behind the split coating and foundry goods are spliced with red soil;
Step 7: use removable roaster that formwork is carried out after baking to reach the requirement of pouring in steel smelting;
Step 8: use argon shield in the steelmaking process, the steel temperature is poured into a mould after reaching refining requirement temperature;
Step 9: the cleaning formwork also excises dead head.
2. the investment casting method of big foundry goods as claimed in claim 1, it is characterized in that, described step 1 is the mould design procedure, and step 2 is the wax-pattern making step, and step 3 is the wax-pattern number of assembling steps, step 4 is a formwork coating step, step 5 is a formwork preroast step, and step 6 is a formwork splicing step, and step 7 is a formwork after baking step, step 8 is the pouring in steel smelting step, and step 9 is the formwork cleanup step.
3. the investment casting method of big foundry goods as claimed in claim 1 is characterized in that, described mould adopts the casting mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010110103 CN102151790B (en) | 2010-02-11 | 2010-02-11 | Investment casting method of heavy castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010110103 CN102151790B (en) | 2010-02-11 | 2010-02-11 | Investment casting method of heavy castings |
Publications (2)
| Publication Number | Publication Date |
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| CN102151790A true CN102151790A (en) | 2011-08-17 |
| CN102151790B CN102151790B (en) | 2013-09-11 |
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| CN 201010110103 Active CN102151790B (en) | 2010-02-11 | 2010-02-11 | Investment casting method of heavy castings |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537618A (en) * | 2013-10-14 | 2014-01-29 | 付绍森 | Carpentry cutter body manufacturing process |
| CN104070143A (en) * | 2014-06-30 | 2014-10-01 | 铜陵市青铜时代雕塑有限责任公司 | Flexible fixing band for fastening casting pattern case |
| CN105234353A (en) * | 2015-10-22 | 2016-01-13 | 贵州安吉航空精密铸造有限责任公司 | Casting process for pipeline portion of casting with long and thin pipeline |
| CN108044035A (en) * | 2017-12-01 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of hot investment casting Split type ceramic formwork assembling forming process |
| CN108500207A (en) * | 2017-02-27 | 2018-09-07 | 上海中洲特种合金材料股份有限公司 | investment casting method |
| CN109604521A (en) * | 2018-11-23 | 2019-04-12 | 安徽应流铸业有限公司 | A kind of preparation method that the compound shell mold of essence casting is reinforced |
| CN109807284A (en) * | 2019-03-05 | 2019-05-28 | 南通海泰科特精密材料有限公司 | A kind of disjunctor crucible formwork manufacture craft and disjunctor crucible formwork for casting |
| CN112123662A (en) * | 2020-09-08 | 2020-12-25 | 哈尔滨工业大学 | Method for preparing underwater acoustic board with cavity with complex structure |
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| US4921038A (en) * | 1988-05-20 | 1990-05-01 | Nobuyoshi Sasaki | Process for preparing mold for investment casting |
| EP0747149A2 (en) * | 1995-06-07 | 1996-12-11 | JOHNSON & JOHNSON PROFESSIONAL Inc. | Investment casting method yielding cast articles with enhanced surface finish |
| US20030041992A1 (en) * | 2001-08-28 | 2003-03-06 | Fee David M. | Rapid investment casting or molding method |
| CN101362187A (en) * | 2008-09-03 | 2009-02-11 | 湖北省丹江口丹传汽车传动轴有限公司 | Investment casting method |
| CN101530892A (en) * | 2009-03-31 | 2009-09-16 | 宁波通达精密铸造有限公司 | Investment casting thin-walled part casting method |
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2010
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4921038A (en) * | 1988-05-20 | 1990-05-01 | Nobuyoshi Sasaki | Process for preparing mold for investment casting |
| EP0747149A2 (en) * | 1995-06-07 | 1996-12-11 | JOHNSON & JOHNSON PROFESSIONAL Inc. | Investment casting method yielding cast articles with enhanced surface finish |
| US20030041992A1 (en) * | 2001-08-28 | 2003-03-06 | Fee David M. | Rapid investment casting or molding method |
| CN101362187A (en) * | 2008-09-03 | 2009-02-11 | 湖北省丹江口丹传汽车传动轴有限公司 | Investment casting method |
| CN101530892A (en) * | 2009-03-31 | 2009-09-16 | 宁波通达精密铸造有限公司 | Investment casting thin-walled part casting method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537618A (en) * | 2013-10-14 | 2014-01-29 | 付绍森 | Carpentry cutter body manufacturing process |
| CN104070143A (en) * | 2014-06-30 | 2014-10-01 | 铜陵市青铜时代雕塑有限责任公司 | Flexible fixing band for fastening casting pattern case |
| CN105234353A (en) * | 2015-10-22 | 2016-01-13 | 贵州安吉航空精密铸造有限责任公司 | Casting process for pipeline portion of casting with long and thin pipeline |
| CN108500207A (en) * | 2017-02-27 | 2018-09-07 | 上海中洲特种合金材料股份有限公司 | investment casting method |
| CN108044035A (en) * | 2017-12-01 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of hot investment casting Split type ceramic formwork assembling forming process |
| CN109604521A (en) * | 2018-11-23 | 2019-04-12 | 安徽应流铸业有限公司 | A kind of preparation method that the compound shell mold of essence casting is reinforced |
| CN109807284A (en) * | 2019-03-05 | 2019-05-28 | 南通海泰科特精密材料有限公司 | A kind of disjunctor crucible formwork manufacture craft and disjunctor crucible formwork for casting |
| CN112123662A (en) * | 2020-09-08 | 2020-12-25 | 哈尔滨工业大学 | Method for preparing underwater acoustic board with cavity with complex structure |
| CN112123662B (en) * | 2020-09-08 | 2022-02-01 | 哈尔滨工业大学 | Method for preparing underwater acoustic board with cavity with complex structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102151790B (en) | 2013-09-11 |
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Owner name: SHANGHAI ZHONGZHOU SPECIAL ALLOY MATERIAL CO., LTD Free format text: FORMER NAME: SHANGHAI ZHONGZHOU SPECIAL ALLOY MATERIALS CO., LTD. |
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Address after: 201815 No. 579, Sheng Shi Road, Jiading Industrial Zone, Shanghai, Jiading District Patentee after: SHANGHAI ZHONGZHOU SPECIAL ALLOY MATERIALS CO., LTD. Address before: 201815 No. 579, Sheng Shi Road, Jiading Industrial Zone, Shanghai, Jiading District Patentee before: Shanghai Zhongzhou Special Alloy Materials Co., Ltd. |