CN102266905A - Manufacturing process of part shell with location hole - Google Patents
Manufacturing process of part shell with location hole Download PDFInfo
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- CN102266905A CN102266905A CN2011101916666A CN201110191666A CN102266905A CN 102266905 A CN102266905 A CN 102266905A CN 2011101916666 A CN2011101916666 A CN 2011101916666A CN 201110191666 A CN201110191666 A CN 201110191666A CN 102266905 A CN102266905 A CN 102266905A
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Abstract
The invention relates to a manufacturing process of a part shell with a location hole; a position of a part wax mold location hole is processed by performing slurry charging-sand lining-drying processes for at least six times, wherein the position of the location hole is processed with zirconium silicate powder slurry by coating a slurry charging material, sprinkling zirconium silicate sand for sand lining, and drying, and then the position of the location hole is processed with mullite sand slurry by coating a slurry charging material, sprinkling mullite sand for sand lining, and drying; after the processing, the process is completed by steps of dewaxing, casting, roasting, and the like. The part shell with a location hole manufactured by the process of the invention has a complete shell at the location hole position; the invention greatly reduces the shell-falling phenomenon at the location hole position; the whole part shell meets technological requirements, and the shell yield reaches above 96%.
Description
Technical field
The present invention relates to a kind of manufacturing process that locating hole machine parts'precise casting shell is arranged, relate in particular to the manufacturing process of a kind of locating hole degree of depth less than 5mm part shell.
Background technology
Locating hole on the machine components is in order to guarantee the circular runout of part, to guarantee the part grinding accuracy.But the making of locating hole is very difficult in the blank of microcast process finished parts.The shell that occurs the locating hole place easily falls shell, and the locating hole on the foundry goods can't cast out as requested, and locating hole is undesirable to make part scene beating degree height when machining, and causes waste product.The shell yield rate of locating hole part is arranged less than 13% with traditional casting technique.
Summary of the invention
The objective of the invention is at above-mentioned deficiency, a kind of manufacturing process that locating hole part shell is arranged is provided, the shell that this technology has solved position of positioning hole falls shell, the drift problem, and the locating hole part shell of manufacturing has high rate of finished products.
The present invention is achieved by the following technical solutions:
A kind of manufacturing process that locating hole part shell is arranged may further comprise the steps:
1) system shell: the process of the position of part wax-pattern locating hole being carried out at least six spreading mass-extension sand-dryings is handled, and wherein with zirconium English powder slurry the position of locating hole is brushed spreading mass, is spread zircon sand extension sand, the dry processing earlier; Again with not coming mortar that the position of locating hole is brushed spreading mass, spread and do not come sand to hang sand, the dry processing;
2) dewaxing: under pressure 0.6～0.75MP, 150～170 ℃ of conditions of temperature, dewaxing, 6～10 minutes time;
3) cast is carried out according to conventional parameter;
4) roasting: 1000～1100 ℃ of sintering temperatures are incubated 30 minutes after reaching temperature at least.
Described zirconium English powder slurry is made up of Ludox, lubricant, defoamer and zirconium English powder, and its weight ratio is 100: (0.45～0.47): (0.22～0.24): (360～400).
The viscosity of described zirconium English powder slurry requires: flow velocity 30～35 seconds (surveying slurry viscosity with No. 4 Zhan Shi flow velocity cups under 24 ± 2 ℃ of environment temperatures).
Above-mentioned zirconium English powder slurry compound method is: add Ludox, lubricant, defoamer successively in being stained with the slurry bucket, and then adding 300 purpose zirconium English powder; When adding 300 order zirconium English powder, to adopt manual auxiliary the stirring while adding, in adition process, pile up caking to prevent 300 order zirconium English powder, after the adding of 300 order zirconium English powder finishes, by the rotation of being stained with the slurry bucket slurry is fully stirred, stir,, promptly get zirconium English powder slurry to ensure the quality of products; The control of its mixing time is in two kinds of situation: (a) be stained with in the slurry bucket some zirconium English powder slurry in advance, when needing to add a part of virgin material preparation, mixing time was controlled at more than 12 hours; (b) be stained with when all adding virgin material in the slurry bucket, mixing time was controlled at more than 24 hours.Stir at slurry and to measure slurry viscosity at the beginning of later on No. 4 Zhan Shi flow velocity cups in 2 hours, at this moment (viscosity of technological requirement is according to concrete product and fixed to the viscosity that the viscosity of Ce Lianging should a little higher than technological requirement, product is not fixed, technological requirement viscosity just cannot be decided, but their scope is mentioned in front), because slurry is after fully stirring, viscosity also can slightly descend, when preliminary survey, if viscosity will add 300 order zirconium English powders when low, to add Ludox adjusted when viscosity is high, the slurry viscosity that stirs finally is controlled within the technological requirement scope, can make qualified plastic refractory.
Describedly do not come the powder slurry by not coming powder and Ludox to form, its weight ratio is 90: 130～160.
The described viscosity requirement that does not come the powder slurry: flow velocity 10～21 seconds (under 24 ± 2 ℃ of environment temperatures, surveying slurry viscosities) with No. 4 Zhan Shi flow velocity cups.
The above-mentioned compound method of not coming mortar is: add Ludox successively in being stained with slurry bucket, 200 purposes are not come powder, the indirect labor does not stir when adding comes powder, prevent from not come powder in adition process, to pile up caking, adding the back that finishes fully stirs by the rotation of being stained with the slurry bucket, until evenly, to ensure the quality of products, promptly get and do not come mortar; The control of its mixing time is in two kinds of situation: (a) be stained with when all adding virgin material in the slurry bucket, stir more than 10 hours; (b) be stained with that some does not come mortar in advance in the slurry bucket, when needing to add a part of virgin material preparation, stir more than 5 hours.The standard control that stirs: after stirring 2 hours,, do not come powder, will add Ludox adjusted when viscosity is high if viscosity will add 200 orders when low with No. 4 Zhan Shi flow velocity cup preliminary survey slurry viscosities.Make the slurry viscosity that stirs finally be controlled within the technological requirement scope (viscosity be according to concrete product and fixed, product is not decided technological requirement viscosity and just cannot be decided, but their scope is mentioned in front), can make qualified plastic refractory.
The JN30 Ludox that Ludox among the present invention can adopt Qingdao Fu Saike founding materials Co., Ltd to produce; The A type defoamer that the J.F.C lubricant that lubricant adopts Hangzhou precision-investment casting research institute to produce, defoamer adopt Shangyu city two foreign silicon Products Co., Ltd to produce.
Above-mentioned steps 1) preferably to having the process processing that locating hole part wax-pattern carries out six spreading mass-extension sand-dryings, the process of each spreading mass-extension sand-drying is handled and is formed one deck, is specially:
1. ground floor: being stained with flow velocity is the zirconium English powder slurry of 30～35 seconds (surveying slurry viscosities with No. 4 Zhan Shi flow velocity cups under 24 ± 2 ℃ of environment temperatures), the position of locating hole is picked slurry with hairbrush carefully brushes, till locating hole does not have bubble and speckles with slurry fully, spread 100～120 order zircon sands to abundant slurry attached to the wax-pattern brushing, (annotate: wax-pattern immersed in the slurry gentle breeze drying fully in 4～6 hours afterwards, be a kind of fully adhesion freely, do not have the requirement of consumption; Zircon sand is that free-falling does not have the consumption requirement also fully attached to being coated on the wax-pattern slurry yet in drenching the sand machine, as long as be stained with the fully not free restriction of slurry.These all are necessary, the most basic technology of hot investment casting, for described those skilled in the art known);
2. the second layer: the dry good wax-pattern shell of ground floor is immersed Ludox (needn't immerse fully, drawing the position that Ludox drops in locating hole with dropper) about 3-5 takes out after second, be stained with flow velocity again and be 30～35 seconds zirconium English powder slurry, the position of locating hole is picked slurry with hairbrush carefully brushes, till locating hole does not have bubble and speckles with slurry fully, (in order to reduce cost, this one deck can immerse slurry fully, but slurry can not exceed the position that shell picks Ludox, the while slurry will cover locating hole fully and get final product) spread 100～120 order zircon sands to abundant slurry attached to the new brushing of wax-pattern, the gentle breeze drying is 4～6 hours afterwards;
3. the 3rd layer: the dry good shell of the second layer is immersed Ludox (needn't immerse fully, drawing the position that Ludox drops in locating hole with dropper) about 3-5 takes out after second, (do not come powder and Ludox weight ratio 1.5～2.5: 1) locating hole is tamped with paste zirconium English powder slurry, the coat scope of wax-pattern shell of paste zirconium English powder slurry will exceed the locating hole outward flange greater than 8mm, spread 100～120 order zircon sands to abundant slurry attached to the new brushing of wax-pattern, the gentle breeze drying is 10～12 hours afterwards;
4. the 4th layer: the wax-pattern shell that the 3rd layer of drying is good immerses Ludox and takes out after about 3 to 5 seconds, and that is stained with flow velocity 18～21 seconds again does not come the powder slurry, spreads 30～60 orders and does not come sand to the abundant slurry attached to the new brushing of wax-pattern, and the gentle breeze drying is 8～24 hours afterwards;
5. layer 5: be stained with flow velocity 18～21 seconds (under 24 ± 2 ℃ of environment temperatures, surveying slurry viscosities) with No. 4 Zhan Shi flow velocity cups do not come the powder slurry, spreading 16～30 orders does not come sand to abundant slurry attached to the new brushing of wax-pattern, dry 8～10 hours afterwards, wind was the bigger the better;
6. layer 6, be stained with flow velocity 10～19 seconds (under 24 ± 2 ℃ of environment temperatures, surveying slurry viscosities) with No. 4 Zhan Shi flow velocity cups do not come the powder slurry, dry 12～48 hours afterwards, wind was the bigger the better.
Other technological parameter is carried out according to conventional parameter in the manufacturing process, does not repeat them here.
By technology manufacturing of the present invention locating hole part shell arranged, locating hole position shell is complete, greatly reduces the position of positioning hole shell and falls the shell phenomenon, whole part shell meets specification requirement, the shell yield rate reaches more than 96%.
Description of drawings
Fig. 1 is the structural front view of embodiment 1;
Wherein: 1 is locating hole.
The specific embodiment
The present invention is further illustrated below in conjunction with embodiment:
Embodiment 1: spherical axle shell (there is locating hole on spherical axle top) manufacturing process, and step is as follows:
(1) system shell, the process that spherical axle wax-pattern carries out six spreading mass-extension sand-dryings is handled:
Zirconium English powder slurry is made up of Ludox, lubricant, defoamer and zirconium English powder, and its weight ratio is 100: 0.45: 0.22: 360, and in being stained with the slurry bucket, add Ludox, lubricant, defoamer successively, and then add 300 purpose zirconium English powder, stir.
Do not come mortar by not coming powder and Ludox to form, its weight ratio is 90: 130, adds Ludox successively in being stained with slurry bucket, 200 purposes are not come powder, stirs.
1. ground floor: be stained with flow velocity and be 33 seconds zirconium English powder slurry, and the position of locating hole is picked slurry with hairbrush carefully brush, till locating hole does not have bubble and speckles with slurry fully, spread 100～120 order zircon sands, gentle breeze is dry 6 hours afterwards;
2. the second layer: the dry good shell of ground floor is immersed Ludox, immerse the whole shell position of half approximately, take out after 5 seconds, draw the position that Ludox drops in locating hole with dropper, be stained with flow velocity again and be 33 seconds zirconium English powder slurry, be stained with slurry and do not exceed the position that shell picks Ludox, the position of locating hole is picked slurry with hairbrush carefully brushes, till locating hole does not have bubble and speckles with slurry fully, spread 100～120 order zircon sands, gentle breeze is dry 5 hours afterwards;
3. the 3rd layer: the dry good shell of the second layer is immersed Ludox, immerse the position of whole shell 1/3, take out after 3 seconds, draw the position that Ludox drops in locating hole with dropper, with paste zirconium English powder slurry locating hole is tamped, the coat scope of shell of paste slurry will exceed the locating hole outward flange and is greater than 8mm, spreads 100～120 order zircon sands, and gentle breeze is dry 11 hours afterwards;
4. the 4th layer: the 3rd layer of shell that drying is good immersed Ludox takes out after 4 seconds, draw the position that Ludox drops in locating hole with dropper, that is stained with flow velocity 20 seconds again does not come the powder slurry, spreads 30～60 orders and does not come sand, and drying is 8 hours afterwards, gentle breeze;
5. layer 5: that is stained with flow velocity 20 seconds does not come the powder slurry, spreads 16～30 orders and does not come sand, and dry 10 hours afterwards, wind was the bigger the better;
6. layer 6, that is stained with flow velocity 16 seconds does not come the powder slurry, and dry 18 hours afterwards, wind was the bigger the better.
(2) dewaxing: under pressure 0.6MP, 170 ℃ of conditions of temperature, dewaxing, 10 minutes time;
(3) cast is carried out according to conventional parameter;
(4) roasting: 1000 ℃ of sintering temperatures are incubated 30 minutes after reaching temperature at least.
Other technological parameter is carried out according to conventional parameter, does not repeat them here.
The shell phenomenon does not appear falling in 650 of the spherical axle shells of producing by this method, and qualification rate reaches 100%.
Embodiment 2
Umbrella head axle shell manufacturing process, step is as follows:
(1) system shell, carry out the process of seven spreading mass-extension sand-dryings and handle to umbrella head axle wax-pattern:
Zirconium English powder slurry is made up of Ludox, lubricant, defoamer and zirconium English powder, and its weight ratio is 100: 0.46: 0.23: 400, and in being stained with the slurry bucket, add Ludox, lubricant, defoamer successively, and then add 300 purpose zirconium English powder, stir.
Do not come the powder slurry by not coming powder and Ludox to form, its weight ratio is 90: 150, adds Ludox successively in being stained with slurry bucket, 200 purposes are not come powder, stirs.
1. ground floor: be stained with flow velocity and be 34 seconds zirconium English powder slurry, and the position of locating hole is picked slurry with hairbrush carefully brush, till locating hole does not have bubble and speckles with slurry fully, spread 100～120 order zircon sands, gentle breeze is dry 4 hours afterwards;
2. the second layer: the dry good shell of ground floor is immersed Ludox, immerse the whole shell position of half approximately, take out after 5 seconds, draw the position that Ludox drops in locating hole with dropper, be stained with flow velocity again and be 34 seconds zirconium English powder slurry, be stained with slurry and do not exceed the position that shell picks Ludox, the position of locating hole is picked slurry with hairbrush carefully brushes, till locating hole does not have bubble and speckles with slurry fully, spread 100～120 order zircon sands, gentle breeze is dry 6 hours afterwards;
3. the 3rd layer: the dry good shell of the second layer is immersed Ludox, immerse the position of whole shell 1/3, take out after 3 seconds, draw the position that Ludox drops in locating hole with dropper, with paste zirconium English powder slurry locating hole is tamped, the coat scope of shell of paste slurry will exceed the locating hole outward flange and is greater than 8mm, spreads 100～120 order zircon sands, and gentle breeze is dry 11 hours afterwards;
4. the 4th layer: the 3rd layer of shell that drying is good immersed Ludox takes out after 4 seconds, draw the position that Ludox drops in locating hole with dropper, that is stained with flow velocity 18 seconds again does not come the powder slurry, spreads 30～60 orders and does not come sand, and drying is 10 hours afterwards, gentle breeze;
5. layer 5: that is stained with flow velocity 18 seconds does not come the powder slurry, spreads 16～30 orders and does not come sand, and dry 10 hours afterwards, wind was the bigger the better;
6. layer 6: that is stained with flow velocity 18 seconds does not come the powder slurry, spreads 16～30 orders and does not come sand, and dry 12 hours afterwards, wind was the bigger the better;
7. layer 7, that is stained with flow velocity 12 seconds does not come the powder slurry, and dry 20 hours afterwards, wind was the bigger the better.
(2) dewaxing: under pressure 0.75MP, 150 ℃ of conditions of temperature, dewaxing, 10 minutes time;
(3) cast is carried out according to conventional parameter;
(4) roasting: 1100 ℃ of sintering temperatures are incubated 30 minutes after reaching temperature at least.
Other technological parameter is carried out according to conventional parameter, does not repeat them here.
The shell phenomenon does not appear falling in 100 of the umbrella head axle shells of producing by this method, and qualification rate reaches 100%.
Claims (5)
1. the manufacturing process that locating hole part shell is arranged is characterized in that, may further comprise the steps:
1) system shell: the process of the position of part wax-pattern locating hole being carried out at least six spreading mass-extension sand-dryings is handled, and wherein with zirconium English powder slurry the position of locating hole is brushed spreading mass, is spread zircon sand extension sand, the dry processing earlier; Again with not coming mortar that the position of locating hole is brushed spreading mass, spread and do not come sand to hang sand, the dry processing;
2) dewaxing: under pressure 0.6～0.75MP, 150～170 ℃ of conditions of temperature, dewaxing, 6～10 minutes time;
3) cast;
4) roasting: 1000～1100 ℃ of sintering temperatures are incubated 30 minutes after reaching temperature at least.
2. the manufacturing process that locating hole part shell is arranged according to claim 1, it is characterized in that, described zirconium English powder slurry is made up of Ludox, lubricant, defoamer and zirconium English powder, and its weight ratio is 100: 0.45～0.47: 0.22～0.24: 360～400.
3. the manufacturing process that locating hole part shell is arranged according to claim 1 is characterized in that, does not describedly come mortar by not coming powder and Ludox to form, and its weight ratio is 90: 130～160.
4. the manufacturing process that locating hole part shell is arranged according to claim 1 is characterized in that, the process that step 1) is carried out six spreading mass-extension sand-dryings to the position of part wax-pattern locating hole is handled.
5. the manufacturing process that locating hole part shell is arranged according to claim 4 is characterized in that, the process of described six spreading masses-extension sand-drying is treated to:
1. ground floor: be stained with flow velocity and be 30～35 seconds zirconium English powder slurry, the position of locating hole is picked slurry with hairbrush carefully brushes, till locating hole does not have bubble and speckles with slurry fully, spread 100～120 order zircon sands to abundant slurry attached to the wax-pattern brushing, the gentle breeze drying is 16～24 hours afterwards;
2. the second layer: the dry good wax-pattern shell of ground floor is immersed Ludox 3-5 take out after second, be stained with flow velocity again and be 30～35 seconds zirconium English powder slurry, the position of locating hole is picked slurry with hairbrush carefully brushes, till locating hole does not have bubble and speckles with slurry fully, spread 100～120 order zircon sands to abundant slurry attached to the new brushing of wax-pattern, the gentle breeze drying is 16～24 hours afterwards;
3. the 3rd layer: the dry good shell of the second layer is immersed Ludox 3-5 take out after second, with the paste zirconium English powder slurry that does not come powder and Ludox weight ratio 1.5～2.5: 1 locating hole is tamped, the coat scope of wax-pattern shell of paste slurry will exceed the locating hole outward flange greater than 8mm, spread 100～120 order zircon sands to abundant slurry attached to the new brushing of wax-pattern, the gentle breeze drying is 24～28 hours afterwards;
4. the 4th layer: the wax-pattern shell that the 3rd layer of drying is good immerses Ludox 3-5 and takes out after second, and that is stained with flow velocity 18～21 seconds again does not come the powder slurry, spread 30～60 orders do not come sand to fully attached on the new slurry of brushing of wax-pattern, the gentle breeze drying is 8～24 hours afterwards;
5. layer 5: that is stained with flow velocity 18～21 seconds does not come the powder slurry, spread 16～30 orders do not come sand to fully attached on the new slurry of brushing of wax-pattern, the strong wind drying is 8～10 hours afterwards;
6. layer 6, that is stained with flow velocity 10～19 seconds does not come the powder slurry, and the strong wind drying is 12～48 hours afterwards.
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| CN104190855A (en) * | 2014-06-19 | 2014-12-10 | 泊头市宏昌机械有限责任公司 | Zircon-sand mullite-sand mold core used for silica sol precision casting and manufacturing method thereof |
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| CN106077486A (en) * | 2016-08-18 | 2016-11-09 | 吴江市森泰机械制造有限公司 | A kind of silica sol precision casting technique of pipe valve |
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| CN109261901A (en) * | 2018-11-26 | 2019-01-25 | 惠州市吉邦精密技术有限公司 | A kind of process for making shell of easily defeated and dispersed shell |
| CN110625065A (en) * | 2019-10-15 | 2019-12-31 | 张家港市华泰泵阀制造有限公司 | Method for directly casting hole on Cr28 casting |
| CN111620707A (en) * | 2020-06-09 | 2020-09-04 | 江苏脒诺甫纳米材料有限公司 | Composite zircon powder and preparation method thereof |
| CN111620707B (en) * | 2020-06-09 | 2022-07-08 | 江苏脒诺甫纳米材料有限公司 | Preparation method of composite zircon powder |
| CN115041629A (en) * | 2022-06-28 | 2022-09-13 | 河北钢研德凯科技有限公司 | Composite shell surface coating and composite shell |
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Application publication date: 20111207 |