CN105478672A - Investment centrifugal casting method and device used for formwork dewaxing port and having plugging device - Google Patents
Investment centrifugal casting method and device used for formwork dewaxing port and having plugging device Download PDFInfo
- Publication number
- CN105478672A CN105478672A CN201510981385.9A CN201510981385A CN105478672A CN 105478672 A CN105478672 A CN 105478672A CN 201510981385 A CN201510981385 A CN 201510981385A CN 105478672 A CN105478672 A CN 105478672A
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- pattern
- formwork
- wax
- screw thread
- external screw
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- 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
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/101—Moulds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses an investment centrifugal casting method and an investment centrifugal casting device used for a formwork dewaxing port and having a plugging device. The device comprises a ceramic end cap and an outer thread wax pattern with the shape and size identical to those of the end cap. The method comprises the following steps: making a wax pattern and making the ceramic end cap and the outer thread wax pattern matched with the wax pattern according to conventional technical conditions; bonding the outer thread wax pattern to the bottom of a die frame of the wax pattern and then coating to make a formwork, and cutting off the coating layer on the surface of one end, far away from the frame, of the outer thread wax pattern; then carrying out steam dewaxing and high temperature roasting, and plugging the ceramic end cap and a dewaxing port part of the roasted formwork; and carrying out centrifugal casting after plugging. According to the invention, by adopting the ceramic end cap in thread match, casting defects caused by loosening or falling-off of the end cap are avoided during operation and casting; gas forming amount of the formwork is reduced, and pores in the surface of a cast titanium alloy casting are obviously reduced; and since the operation process is simple and effective, influences of foreign elements are reduced, and the internal metallurgical quality of castings is remarkably improved.
Description
Technical field
The present invention relates to centrifugal casting field, especially a kind of fusible pattern centre spinning method of formwork dewaxing mouth band plugging device and device thereof.
Background technology
Because titanium investment centrifugal casting to be copied by mould with wax material to produce with the same wax-pattern of cast shape, then the upper pouring and riser systems of assembling forms wax-pattern module, and bottom wax-pattern module, place a few place dewaxing mouth.Then on wax-pattern module, be coated with the sand and the powder (this operation is called coating) that hang up the refractory material of multilayer.Need to carry out dewaxing treatment after coating drying, in the dewaxing kettle of HTHP, carry out dewax process by wax-pattern, but this process need carries out wax material eliminating by dewaxing mouth; After formwork high-temperature roasting, need that sealing is carried out to dewaxing mouth and block.When carrying out sealing blocking early stage, adopt always the band ceramic plug of gradient and sodium silicate binder jointly with the use of, but in actual mechanical process, there is error due to manual operation and seal rear inside and cannot judge quality, come off in handling process of being everlasting, in casting process, cause artillery fire defect because this position is loosening and cause foundry goods to be scrapped.Thoroughly solve formwork dewaxing mouth shutoff problem so do not solve, will directly have influence on cast-internal metallurgical quality and casting pouring shaping.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention aims to provide fusible pattern centre spinning method and the device thereof of a kind of formwork dewaxing mouth band plugging device.
The present invention is achieved by following technical solution:
The fusible pattern centre spinning method of formwork dewaxing mouth band plugging device and a device thereof, its device comprises ceramic plug and the external screw thread wax-pattern identical with its shape size, and its method is:
1) technical conditions make wax-pattern and make the ceramic plug and external screw thread wax-pattern that mate with wax-pattern routinely;
2) external screw thread wax-pattern is bonded in after bottom Wax mold shelving and carries out coating operation shell;
3) the surface coating layer of external screw thread wax-pattern away from shelving one end excises to exposing external screw thread wax-pattern after completing by shell processed,
4) then carry out autoclave dewaxing, after dewaxing, high-temperature roasting is carried out to shell;
5) ceramic plug and port part that the formwork after roasting dewaxes are carried out screw thread rotation to be engaged to and to flush with mouthful bottom surface that dewaxes;
6) formwork being carried out centrifugal casting, is shut down the demoulding after black dull redness until foundry goods cooling surface.
Described step 2) in by by the contact surface bottom external screw thread wax-pattern and mould shelving with 90 ~ 110 DEG C of temperature be baked to after surface melting with mould shelving bottom adhesive 10 ~ 20min.
Described step 4) in the parameter of high-temperature roasting be: temperature is 1060 ~ 1070 DEG C, is incubated 3.5 ~ 4.5 hours, is cooled to less than 150 DEG C to come out of the stove.
Described step 6) in the parameter of centrifugal casting be: pouring temperature 900 ~ 950 DEG C, adopt mode first quick and back slow, poring rate is 2 ~ 3kg/s, and centrifugal rotational speed is 650 ~ 700r/min.
The invention has the beneficial effects as follows:
Compared with prior art, the fusible pattern centre spinning method of a kind of formwork dewaxing mouth band plugging device provided by the invention and device thereof, after have employed the ceramic plug after threaded cooperation, in later stage running and casting process, there is not the casting flaw caused that loosens because of plug or come off; Owing to eliminating the use of sodium silicate binder, formwork gas forming amount reduces, and cast titanium alloy casting surface pores out obviously reduces; Simultaneously because this operating process is succinctly effective, decrease the impact of foeign element, cast-internal metallurgical quality is significantly improved.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention casting structure figure
In figure: 1-pottery plug, 2-external screw thread wax-pattern, 3-dewaxes mouth, 4-mould shelving.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further, but described in required protection domain is not limited to;
As shown in the figure, the fusible pattern centre spinning method of a kind of formwork dewaxing mouth band plugging device provided by the invention and device thereof, is characterized in that: its device comprises ceramic plug 1 and the external screw thread wax-pattern 2 identical with its shape size, and its method is:
1) technical conditions make wax-pattern and make the ceramic plug 1 and external screw thread wax-pattern 2 that mate with wax-pattern routinely;
2) external screw thread wax-pattern 2 is bonded in after bottom Wax mold shelving and carries out coating operation shell;
3) the surface coating layer of external screw thread wax-pattern 2 away from shelving one end excises to exposing external screw thread wax-pattern 2 after completing by shell processed,
4) then carry out autoclave dewaxing, after dewaxing, high-temperature roasting is carried out to shell;
5) ceramic plug 1 and port part that formwork after roasting dewaxes are carried out screw thread rotation to be engaged to and to flush with mouthful bottom surface that dewaxes;
6) formwork being carried out centrifugal casting, is shut down the demoulding after black dull redness until foundry goods cooling surface.
Described step 2) in by by the contact surface bottom external screw thread wax-pattern 2 and mould shelving with 90 ~ 110 DEG C of temperature be baked to after surface melting with mould shelving bottom adhesive 10 ~ 20min.
Described step 4) in the parameter of high-temperature roasting be: temperature is 1060 ~ 1070 DEG C, is incubated 3.5 ~ 4.5 hours, is cooled to less than 150 DEG C to come out of the stove.
Described step 6) in the parameter of centrifugal casting be: pouring temperature 900 ~ 950 DEG C, adopt mode first quick and back slow, poring rate is 2 ~ 3kg/s, and centrifugal rotational speed is 650 ~ 700r/min.
Embodiment one: make casting wax mould and make the ceramic plug 1 and external screw thread wax-pattern 2 that mate with wax-pattern; External screw thread wax-pattern 2 is carried out coating operation shell with being bonded in after bottom Wax mold shelving after 90 DEG C of heating tube bakings; Then afterwards the surface coating layer of external screw thread wax-pattern 2 away from shelving one end being excised to exposing external screw thread wax-pattern 2, then carrying out autoclave dewaxing, after dewaxing, using 1060 DEG C of temperature to carry out high-temperature roasting to shell, after roasting, being incubated 3.5 ~ 4.5 hours; Ceramic plug 1 and port part that formwork after roasting dewaxes are carried out screw thread rotation after in-furnace temperature is cooled to come out of the stove when 150 DEG C to be engaged to and to flush with mouthful bottom surface that dewaxes; Formwork is progressively increased to 2kg/s by temperature 900 DEG C, poring rate from 0.5kg/s, and centrifugal rotational speed is progressively increased to 650r/min from 0r/min and carries out centrifugal casting, is shut down the demoulding after black dull redness until foundry goods cooling surface.The casting flaw caused that loosens because of plug or come off is there is not in running and casting process; Formwork gas forming amount reduces, and cast titanium alloy casting surface pores out obviously reduces.
Embodiment two: make casting wax mould and make the ceramic plug 1 and external screw thread wax-pattern 2 that mate with wax-pattern; External screw thread wax-pattern 2 is carried out coating operation shell with being bonded in after bottom Wax mold shelving after 100 DEG C of heating tube bakings; Then afterwards the surface coating layer of external screw thread wax-pattern 2 away from shelving one end being excised to exposing external screw thread wax-pattern 2, then carrying out autoclave dewaxing, after dewaxing, using 1060 DEG C of temperature to carry out high-temperature roasting to shell, after roasting, being incubated 3.5 ~ 4.5 hours; Ceramic plug 1 and port part that formwork after roasting dewaxes are carried out screw thread rotation after in-furnace temperature is cooled to come out of the stove when 150 DEG C to be engaged to and to flush with mouthful bottom surface that dewaxes; Formwork is progressively increased to 2.5kg/s by temperature 930 DEG C, poring rate from 0.5kg/s, and centrifugal rotational speed is progressively increased to 680r/min from 0r/min and carries out centrifugal casting, is shut down the demoulding after black dull redness until foundry goods cooling surface.The casting flaw caused that loosens because of plug or come off is there is not in running and casting process; Formwork gas forming amount reduces, and cast titanium alloy casting surface pores out obviously reduces.
Embodiment three: make casting wax mould and make the ceramic plug 1 and external screw thread wax-pattern 2 that mate with wax-pattern; External screw thread wax-pattern 2 is carried out coating operation shell with being bonded in after bottom Wax mold shelving after 110 DEG C of heating tube bakings; Then afterwards the surface coating layer of external screw thread wax-pattern 2 away from shelving one end being excised to exposing external screw thread wax-pattern 2, then carrying out autoclave dewaxing, after dewaxing, using 1070 DEG C of temperature to carry out high-temperature roasting to shell, after roasting, being incubated 3.5 ~ 4.5 hours; Ceramic plug 1 and port part that formwork after roasting dewaxes are carried out screw thread rotation after in-furnace temperature is cooled to come out of the stove when 150 DEG C to be engaged to and to flush with mouthful bottom surface that dewaxes; Formwork is progressively increased to 3kg/s by temperature 950 DEG C, poring rate from 0.5kg/s, and centrifugal rotational speed is progressively increased to 700r/min from 0r/min and carries out centrifugal casting, is shut down the demoulding after black dull redness until foundry goods cooling surface.The casting flaw caused that loosens because of plug or come off is there is not in running and casting process; Formwork gas forming amount reduces, and cast titanium alloy casting surface pores out obviously reduces.
Claims (4)
1. the fusible pattern centre spinning method of formwork dewaxing mouth band plugging device and a device thereof, is characterized in that: its device comprises ceramic plug (1) and the external screw thread wax-pattern (2) identical with its shape size, and its method is:
1) technical conditions make wax-pattern and make the ceramic plug (1) and external screw thread wax-pattern (2) that mate with wax-pattern routinely;
2) external screw thread wax-pattern (2) is bonded in after bottom Wax mold shelving carries out coating operation shell;
3) the surface coating layer of external screw thread wax-pattern (2) away from shelving one end excises to exposing external screw thread wax-pattern (2) after completing by shell processed,
4) then carry out autoclave dewaxing, after dewaxing, high-temperature roasting is carried out to shell;
5) ceramic plug (1) and port part that formwork after roasting dewaxes are carried out screw thread rotation to be engaged to and to flush with mouthful bottom surface that dewaxes;
6) formwork being carried out centrifugal casting, is shut down the demoulding after black dull redness until foundry goods cooling surface.
2. the fusible pattern centre spinning method of a kind of formwork dewaxing mouth band plugging device according to claim 1 and device thereof, is characterized in that: described step 2) in by contact surface 90 ~ 110 DEG C of temperature bottom external screw thread wax-pattern (2) and mould shelving are baked to after surface melting with mould shelving bottom adhesive 10 ~ 20min.
3. the fusible pattern centre spinning method of a kind of formwork dewaxing mouth band plugging device according to claim 1 and device thereof, it is characterized in that: described step 4) in the parameter of high-temperature roasting be: temperature is 1060 ~ 1070 DEG C, be incubated 3.5 ~ 4.5 hours, be cooled to less than 150 DEG C to come out of the stove.
4. the fusible pattern centre spinning method of a kind of formwork dewaxing mouth band plugging device according to claim 1 and device thereof, it is characterized in that: described step 6) in the parameter of centrifugal casting be: pouring temperature 900 ~ 950 DEG C, adopt mode first quick and back slow, poring rate is 2 ~ 3kg/s, and centrifugal rotational speed is 650 ~ 700r/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981385.9A CN105478672B (en) | 2015-12-24 | 2015-12-24 | A kind of formwork dewaxing fusible pattern centre spinning method and its device of the mouth with plugging device |
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| CN201510981385.9A CN105478672B (en) | 2015-12-24 | 2015-12-24 | A kind of formwork dewaxing fusible pattern centre spinning method and its device of the mouth with plugging device |
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| CN105478672A true CN105478672A (en) | 2016-04-13 |
| CN105478672B CN105478672B (en) | 2017-11-24 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107282909A (en) * | 2017-08-25 | 2017-10-24 | 贵州安吉航空精密铸造有限责任公司 | A kind of running gate system and centre spinning method for tube shape component |
| CN107812884A (en) * | 2017-11-06 | 2018-03-20 | 东方电气集团东方汽轮机有限公司 | Investment pattern precision casting auxiliary dewaxing mouth moulding process |
| CN107824758A (en) * | 2017-12-18 | 2018-03-23 | 贵州安吉航空精密铸造有限责任公司 | A kind of drainage system being used in centrifugal casting technique and its manufacture method |
| CN109332590A (en) * | 2018-11-28 | 2019-02-15 | 贵州安吉航空精密铸造有限责任公司 | It is a kind of that the closed method of wax discharging port is carried out using casting formwork |
| CN109877276A (en) * | 2019-03-12 | 2019-06-14 | 北京百慕航材高科技有限公司 | The shell preparation method in the thick big region in the part of model casting part |
| CN113070452A (en) * | 2021-03-04 | 2021-07-06 | 贵阳航发精密铸造有限公司 | Dewaxing structure of seed crystal method seeding module |
| CN115069980A (en) * | 2022-06-28 | 2022-09-20 | 河北钢研德凯科技有限公司 | Method for preparing investment casting shell by using wax removal plug and ceramic plug and application thereof |
| CN115283645A (en) * | 2022-06-20 | 2022-11-04 | 中国航发哈尔滨东安发动机有限公司 | Preparation and use method of magnesium alloy low-pressure investment casting ceramic shell |
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| JPS6471549A (en) * | 1987-09-09 | 1989-03-16 | G C Dental Ind Corp | Cylinder for making pattern for casting |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107282909A (en) * | 2017-08-25 | 2017-10-24 | 贵州安吉航空精密铸造有限责任公司 | A kind of running gate system and centre spinning method for tube shape component |
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| CN107824758A (en) * | 2017-12-18 | 2018-03-23 | 贵州安吉航空精密铸造有限责任公司 | A kind of drainage system being used in centrifugal casting technique and its manufacture method |
| CN107824758B (en) * | 2017-12-18 | 2020-02-18 | 贵州安吉航空精密铸造有限责任公司 | Manufacturing method of drainage device for titanium alloy centrifugal casting |
| CN109332590A (en) * | 2018-11-28 | 2019-02-15 | 贵州安吉航空精密铸造有限责任公司 | It is a kind of that the closed method of wax discharging port is carried out using casting formwork |
| CN109877276A (en) * | 2019-03-12 | 2019-06-14 | 北京百慕航材高科技有限公司 | The shell preparation method in the thick big region in the part of model casting part |
| CN113070452A (en) * | 2021-03-04 | 2021-07-06 | 贵阳航发精密铸造有限公司 | Dewaxing structure of seed crystal method seeding module |
| CN115283645A (en) * | 2022-06-20 | 2022-11-04 | 中国航发哈尔滨东安发动机有限公司 | Preparation and use method of magnesium alloy low-pressure investment casting ceramic shell |
| CN115283645B (en) * | 2022-06-20 | 2024-01-19 | 中国航发哈尔滨东安发动机有限公司 | Preparation and application methods of magnesium alloy low-pressure investment casting ceramic shell |
| CN115069980A (en) * | 2022-06-28 | 2022-09-20 | 河北钢研德凯科技有限公司 | Method for preparing investment casting shell by using wax removal plug and ceramic plug and application thereof |
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| CN105478672B (en) | 2017-11-24 |
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