CN105344962A - Manufacturing method and device for thin-wall rotary type part - Google Patents
Manufacturing method and device for thin-wall rotary type part Download PDFInfo
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- CN105344962A CN105344962A CN201510882285.0A CN201510882285A CN105344962A CN 105344962 A CN105344962 A CN 105344962A CN 201510882285 A CN201510882285 A CN 201510882285A CN 105344962 A CN105344962 A CN 105344962A
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Abstract
The invention provides a manufacturing method and a device for a thin-wall rotary type part. A mold shell is arranged in a pouring barrel and placed in the center of the pouring barrel through a positioning rod. The gap between the mold shell and the pouring barrel is filled with fixing filling materials. The pouring barrel is fixed to a centrifuging device through a locking device. The centrifuging device is connected with a rotating shaft and rotates together with the rotating shaft. The rotating shaft is fixedly arranged on a fixing support and is further connected with a braking device. A protecting cover is fixedly arranged on the fixing support and located on the periphery of the pouring barrel. A positioning hole is reserved in the top of the protecting cover. A pouring cup is arranged in the positioning hole, and the bottom of the pouring cup is located in the central position of the mold shell. A product formed by the manufacturing method is good in appearance, high in internal density, complete in thin-walled structure molding and high in yield, and moreover, the yield of the product reaches more than 95%. According to the manufacturing method and the device for the thin-wall rotary type part, a thin-wall-type blade with the diameter less than 3 mm can be manufactured, and the defects that misrun or surface cold shut and the like often occurs in the position of a casting blade are overcome.
Description
Technical field
The present invention relates to a kind of slewing parts manufacture method and device, be specifically related to a kind of thin-wall rotation-type part manufacture method and device, belong to machinery processing apparatus technical field.
Background technology
Existing more typical revolving body disc-like foundry goods has impeller, pump impeller and centrifuge tube etc., its material mostly is stainless steel, spheroidal graphite cast-iron, copper alloy etc., the method of the shaping general employing gravity-assist pouring of above-mentioned foundry goods, but the foundry goods of tubulose class is often adopted to the method for centrifugal casting; The wall thickness of the thin-wall construction of final casting is greater than 5mm substantially, is now widely used.But for the cast product that quality requirements is higher, the subject matter that above-mentioned forming method exists is that casting compactness is difficult to reach dynamically balanced requirement, and surface quality is poor, does not reach instructions for use, and yield rate is lower.
Such as, be less than 3mm thin wall blade for manufacture wall thickness, the conventional method adopting gravitational casting, more shaping more difficult, there is the defect such as misrun or surperficial cold shut in foundry goods blade place.
In addition, conventional model casting cere generally can adopt joining method, and the cere connected finally can be caused to criticize seam place and be difficult to rest and reorganize, batch seam place surface quality is poor.
Summary of the invention
The object of the present invention is to provide a kind of thin-wall rotation-type part manufacture method and device, the cast product outward appearance of manufacture is better, and interior solid degree is high, and thin-wall construction is shaping complete, and the yield rate of product is high, reaches more than 95%.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of thin-wall rotation-type part manufacture method, comprises the steps:
(1) adopt urea and white granulated sugar Hybrid Heating in proportion, be poured in the mould of core by the liquid mixture of heating, cooling forms easy fusible core;
(2) described easy fusible core is put into fusible pattern Wax mold and press was moulding, clear up the surface of shaping wax-pattern;
(3) whole described shaping wax-pattern is put into water, described easy fusible core dissolves, and forms cast shape wax-pattern;
(4) adopt full form casting process to make cast shape shell: by described cast shape wax-pattern circulation coating, hanging sand, and dry multilayer, then adopt hot water dewaxing to form cast shape shell;
(5) described cast shape shell is put into roaster, adopt ladder to be heated to design temperature and carry out roasting;
(6) the cast shape shell in step (5) is positioned in teeming ladle fixing, be preheating to design temperature, teeming ladle is fixed on centrifugal device by locking device, the periphery of teeming ladle is covered protective cover, cup is positioned over the center of protective cover end face, and cup does not contact with cast shape shell;
(7) set centrifugal rotational speed, molten steel or molten iron are poured in cast shape shell, foundry goods is shaping under the influence of centrifugal force;
(8) take out after foundry goods cooling, carry out surface treatment and subsequent heat treatment.
Further, in described step (1), the mass ratio of urea and white granulated sugar is (15 ~ 20): 1, and the temperature of heating is 180 ~ 220 DEG C.
Further, in described step (4), described cast shape wax-pattern being immersed in using silica-sol wash is stained with in slurry bucket, treat the whole hanging of described cast shape wax-pattern, rotate described cast shape wax-pattern even to coating, hanging sand is even, dry at indoor seal cavity, recirculation coating, hanging sand, dry multilayer; Then by the arrangement of the cast shape wax-pattern of above-mentioned dry multilayer in the hot water, dead head upward, is convenient to liquid wax and is discharged, form the cavity shell of cast shape.
Further, in described step (5), the technique of ladder heating is 300 DEG C of insulations 1 hour, is warmed up to 950 DEG C of insulations 2 hours.
Further, in described step (6), the design temperature of preheating is 800 ~ 820 DEG C; Described locking device comprises locking annulus, apron strip and baffle plate draw-in groove, and locking annulus is connected with apron strip and is connected by baffle plate draw-in groove and locks.Described apron strip is close to teeming ladle and is arranged, and is provided with baffle plate draw-in groove at the lateral surface of apron strip, locking annulus and apron strip perpendicular and be arranged in baffle plate draw-in groove.
Further, in described step (7), when molten steel or molten iron being poured in cast shape shell, centrifugal rotating speed is centrifugal rotating speed is 400r/min; Rotating speed after casting complete is 200r/min.
A kind of thin-wall rotation-type part manufacturing installation, comprise fixed support, centrifugal device, locking device, teeming ladle, cup, locating bar, locating hole, inserts, protective cover, turning cylinder and stop device of stopping, the described cast shape shell after roasting is equipped with in described teeming ladle, cast shape shell is placed on the center of teeming ladle by locating bar, and the space between cast shape shell and teeming ladle is full of inserts; Teeming ladle is fixed on centrifugal device by described locking device, and described locking device comprises locking annulus, apron strip and baffle plate draw-in groove, and locking annulus is connected with apron strip and is connected by baffle plate draw-in groove and locks; Described centrifugal device is connected with turning cylinder, and rotates together, and turning cylinder is fixedly installed on fixed support, and turning cylinder is also connected with stop device of stopping; Fixed support is fixed with protective cover, and protective cover is positioned at the periphery of teeming ladle; The top of protective cover is reserved with locating hole, and locating hole is equipped with cup, and the bottom of cup is positioned at the center of described cast shape shell.
Described inserts is conventional Foundry quartz sand; Described centrifugal device is centrifugal turntable; Described cast shape shell is circular or subcircular thin-section casting.
Described apron strip is close to teeming ladle and is arranged, and is provided with baffle plate draw-in groove at the lateral surface of apron strip, locking annulus and apron strip perpendicular and be arranged in baffle plate draw-in groove.
The beneficial effect that the present invention has is as follows:
(1) adopt manufacture method of the present invention, shaping product appearance is better, and interior solid degree is high, and thin-wall construction is shaping complete, and the yield rate of product is high, reaches more than 95%.
(2) compared with the method for casting with conventional articulated gravity, adopt the inventive method can manufacture the thin wall blade that wall thickness is less than 3mm, and which overcome foundry goods blade place and have the defect such as misrun or surperficial cold shut more.
(3) compared with the splicing method adopted with conventional model casting wax-pattern technique, the present invention adopts easy meltable core shaping model casting cere, finally can form complicated thin-wall construction, and solves foundry goods and criticize seam and the even problem of wall unevenness.
(4) whole centrifugal device is provided with protective cover, makes the process of centrifugal casting complexity safer, and simple to operate.
(5) device of the present invention can move easily, for other operation follow-up has vacateed space and operable time, improves the accuracy of manufacture of this type of part and manufactures efficiency, ensure that the quality of cast product.
Accompanying drawing explanation
Fig. 1 is the sectional view of thin-wall rotation-type part manufacturing installation of the present invention;
Fig. 2 is the top view of thin-wall rotation-type part manufacturing installation of the present invention;
Fig. 3 is the schematic diagram of locking device of the present invention;
Fig. 4 is the schematic diagram of the baffle plate draw-in groove in the present invention;
Fig. 5 is the process chart of manufacture method of the present invention;
Wherein, 1-fixed support, 2-centrifugal turntable, 3-apron strip, 4-teeming ladle, 5-cup, 6-locating bar, 7-circular locating openings, 8-locks annulus, 9-cast shape shell, 10-fixes inserts, 11-protective cover, 12-turning cylinder, and 13-stops stop device, 14-baffle plate draw-in groove.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
Shown in Fig. 1-4, the structure of the thin-wall rotation-type part manufacturing installation of the present embodiment is specific as follows: cast shape shell 9 is placed in teeming ladle 4, is positioned over teeming ladle 4 center by locating bar 6; Fixing inserts 10 is full of the hole between cast shape shell 9 and teeming ladle 4, for fixing cast shape shell 9 and teeming ladle 4.
Teeming ladle 4 is fixed on centrifugal turntable 2 by locking device, and locking device comprises locking annulus 8, apron strip 3 and baffle plate draw-in groove 14, and locking annulus 8 is connected with apron strip 3 and passes through baffle plate draw-in groove 14 and is connected and locks.Particularly, apron strip 3 is close to teeming ladle 4 and is arranged, and is provided with baffle plate draw-in groove 14 at the lateral surface of apron strip 3, and locking annulus 8 is perpendicular and be arranged in baffle plate draw-in groove 14 with apron strip 3.
Centrifugal turntable 2 is connected with turning cylinder 12, and rotates together, and turning cylinder 12 is fixedly installed on fixed support 1, and turning cylinder 12 is also connected with stop device 13 of stopping.
Fixed support 1 is fixed with protective cover 11, and protective cover 11 is positioned at the periphery of teeming ladle 4; The top of protective cover 11 is reserved with circular locating openings 7, circular locating openings 7 is equipped with cup 5, and ensure that the bottom of cup 5 is positioned at the center of cast shape shell 9, cup 5 does not contact with cast shape shell 9.
Preferably, fixing inserts 10 is conventional Foundry quartz sand.Cast shape shell 9 is circular or subcircular thin-section casting.
Embodiment
The revolution foundry goods external diameter 400mm of the present embodiment, height 300mm, material 35GrMo, 13 thin wall vanes, blade average wall thickness 5mm, the thickness of the thinnest blade is 2mm.Adopt manufacturing installation and the manufacturing process of thin wall vane pump impeller, concrete steps are as follows:
The first step: urea and white granulated sugar are mixed according to the ratio that mass ratio is 15:1, is heated to 200 DEG C of fusings, fusing fluid is poured in core mold and cools, Cheng Xin (easy fusible core);
Second step: easy fusible core is put into fusible pattern Wax mold and presses was moulding, pressure 0.5Mpa, clears up shaping wax-pattern surface, ensures the fineness on its surface;
3rd step: the water whole shaping wax-pattern being put into flowing, water temperature room temperature, in the short period in easy fusible core dissolved water, forms cast shape wax-pattern;
4th step: adopt full form casting process to make cast shape shell 9: cast shape wax-pattern is immersed in using silica-sol wash and is stained with in slurry bucket, treat the whole hanging of wax-pattern, rotate wax-pattern even to coating, hanging sand (zircon sand+plum cash sand) is even, dry at indoor seal cavity, circulation coating, hanging sand, dry multilayer; Then arrange in the hot water, dead head upward, is convenient to liquid wax and is discharged, form the cavity shell 9 of cast shape;
5th step: cast shape shell 9 is put into roaster, 300 DEG C are incubated 1 hour, are warmed up to 950 DEG C, are incubated ladder heating in 2 hours, heat up and prevent cast shape shell 9 be out of shape and ftracture;
6th step: cast shape shell 9 is positioned in teeming ladle 4 fixing, be preheating to 800 DEG C, be positioned in centrifugal device (centrifugal turntable 2), cover protective cover 11, cup 5 is placed on the center of protective cover 11 end face, does not contact with cast shape shell 9;
7th step: be fixed on centrifugal turntable 2 by teeming ladle 4 by locking annulus 8 and apron strip 3, ensures the security in casting process;
8th step: setting centrifuge speed 400r/min, be poured in cast shape shell 9 by molten steel (molten iron), after casting complete, rotating speed reduces to 200r/min, and foundry goods is shaping under the influence of centrifugal force;
9th step: cool after 8 hours, takes out cooled teeming ladle 4 from centrifugal turntable 2, cleans out foundry goods, carry out surface treatment and subsequent heat treatment from cast shape shell 9.
The foregoing is only preference embodiment of the present invention, do not form limiting the scope of the present invention.Any any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (10)
1. a thin-wall rotation-type part manufacture method, is characterized in that, described method comprises the steps:
(1) adopt urea and white granulated sugar Hybrid Heating in proportion, be poured in the mould of core by the liquid mixture of heating, cooling forms easy fusible core;
(2) described easy fusible core is put into fusible pattern Wax mold and press was moulding, clear up the surface of shaping wax-pattern;
(3) whole described shaping wax-pattern is put into water, described easy fusible core dissolves, and forms cast shape wax-pattern;
(4) adopt full form casting process to make cast shape shell: by described cast shape wax-pattern circulation coating, hanging sand, and dry multilayer, then adopt hot water dewaxing to form cast shape shell;
(5) described cast shape shell is put into roaster, adopt ladder to be heated to design temperature and carry out roasting;
(6) the cast shape shell in step (5) is positioned in teeming ladle fixing, be preheating to design temperature, teeming ladle is fixed on centrifugal device by locking device, the periphery of teeming ladle is covered protective cover, cup is positioned over the center of protective cover end face, and cup does not contact with cast shape shell;
(7) set centrifugal rotational speed, molten steel or molten iron are poured in cast shape shell, foundry goods is shaping under the influence of centrifugal force;
(8) take out after foundry goods cooling, carry out surface treatment and subsequent heat treatment.
2. a kind of thin-wall rotation-type part manufacture method as claimed in claim 1, is characterized in that, in described step (1), the mass ratio of urea and white granulated sugar is (15 ~ 20): 1, and the temperature of heating is 180 ~ 220 DEG C.
3. a kind of thin-wall rotation-type part manufacture method as claimed in claim 1, it is characterized in that, in described step (4), described cast shape wax-pattern is immersed in using silica-sol wash and is stained with in slurry bucket, treat the whole hanging of described cast shape wax-pattern, rotate described cast shape wax-pattern even to coating, hanging sand is even, dry at indoor seal cavity, recirculation coating, hanging sand, dry multilayer; Then by the arrangement of the cast shape wax-pattern of above-mentioned dry multilayer in the hot water, dead head upward, is convenient to liquid wax and is discharged, form the cavity shell of cast shape.
4. a kind of thin-wall rotation-type part manufacture method as described in one of as any in claim 1-3, it is characterized in that, in described step (5), the technique of ladder heating is 300 DEG C of insulations 1 hour, is warmed up to 950 DEG C of insulations 2 hours.
5. a kind of thin-wall rotation-type part manufacture method as described in one of as any in claim 1-3, it is characterized in that, in described step (6), the design temperature of preheating is 800 ~ 820 DEG C; Described locking device comprises locking annulus, apron strip and baffle plate draw-in groove, and locking annulus is connected with apron strip and is connected by baffle plate draw-in groove and locks.
6. a kind of thin-wall rotation-type part manufacture method as claimed in claim 5, is characterized in that, described apron strip is close to teeming ladle and is arranged, and is provided with baffle plate draw-in groove at the lateral surface of apron strip, locking annulus and apron strip perpendicular and be arranged in baffle plate draw-in groove.
7. a kind of thin-wall rotation-type part manufacture method as described in one of as any in claim 1-3, it is characterized in that, in described step (7), when molten steel or molten iron being poured in cast shape shell, centrifugal rotating speed is centrifugal rotating speed is 400r/min; Rotating speed after casting complete is 200r/min.
8. a thin-wall rotation-type part manufacturing installation, it is characterized in that, described manufacturing installation comprises fixed support, centrifugal device, locking device, teeming ladle, cup, locating bar, locating hole, inserts, protective cover, turning cylinder and stop device of stopping, the described cast shape shell after roasting is equipped with in described teeming ladle, cast shape shell is placed on the center of teeming ladle by locating bar, and the space between cast shape shell and teeming ladle is full of inserts; Teeming ladle is fixed on centrifugal device by described locking device, and described locking device comprises locking annulus, apron strip and baffle plate draw-in groove, and locking annulus is connected with apron strip and is connected by baffle plate draw-in groove and locks; Described centrifugal device is connected with turning cylinder, and rotates together, and turning cylinder is fixedly installed on fixed support, and turning cylinder is also connected with stop device of stopping; Fixed support is fixed with protective cover, and protective cover is positioned at the periphery of teeming ladle; The top of protective cover is reserved with locating hole, and locating hole is equipped with cup, and the bottom of cup is positioned at the center of described cast shape shell.
9. a kind of thin-wall rotation-type part manufacturing installation as claimed in claim 8, is characterized in that, described inserts is conventional Foundry quartz sand; Described centrifugal device is centrifugal turntable; Described cast shape shell is circular or subcircular thin-section casting.
10. a kind of thin-wall rotation-type part manufacturing installation as claimed in claim 8 or 9, is characterized in that, described apron strip is close to teeming ladle and is arranged, and is provided with baffle plate draw-in groove at the lateral surface of apron strip, locking annulus and apron strip perpendicular and be arranged in baffle plate draw-in groove.
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| CN201510882285.0A CN105344962A (en) | 2015-12-04 | 2015-12-04 | Manufacturing method and device for thin-wall rotary type part |
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| CN201510882285.0A CN105344962A (en) | 2015-12-04 | 2015-12-04 | Manufacturing method and device for thin-wall rotary type part |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108115089A (en) * | 2017-12-23 | 2018-06-05 | 安徽鑫宏机械有限公司 | A kind of fusible pattern pinion stand shell preparation process based on compound wax-pattern |
| CN109454212A (en) * | 2018-03-27 | 2019-03-12 | 南京宝泰特种材料股份有限公司 | The irregular thin-section casting centre spinning method of titanium |
| CN109759543A (en) * | 2019-01-04 | 2019-05-17 | 丁勇 | A kind of copper casted sculpture method for casting production |
| CN109848737A (en) * | 2019-03-12 | 2019-06-07 | 四川明日宇航工业有限责任公司 | A kind of fill process suitable for netted honeycomb class part |
| CN111230062A (en) * | 2020-03-16 | 2020-06-05 | 常州工业职业技术学院 | Casting method of thin-wall impeller part |
| CN111571291A (en) * | 2020-05-21 | 2020-08-25 | 贵州永红航空机械有限责任公司 | Filling material and filling method |
| CN113560496A (en) * | 2021-08-10 | 2021-10-29 | 贵州安吉航空精密铸造有限责任公司 | Casting forming method for martensitic stainless steel casting |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108115089A (en) * | 2017-12-23 | 2018-06-05 | 安徽鑫宏机械有限公司 | A kind of fusible pattern pinion stand shell preparation process based on compound wax-pattern |
| CN109454212A (en) * | 2018-03-27 | 2019-03-12 | 南京宝泰特种材料股份有限公司 | The irregular thin-section casting centre spinning method of titanium |
| CN109759543A (en) * | 2019-01-04 | 2019-05-17 | 丁勇 | A kind of copper casted sculpture method for casting production |
| CN109848737A (en) * | 2019-03-12 | 2019-06-07 | 四川明日宇航工业有限责任公司 | A kind of fill process suitable for netted honeycomb class part |
| CN111230062A (en) * | 2020-03-16 | 2020-06-05 | 常州工业职业技术学院 | Casting method of thin-wall impeller part |
| CN111571291A (en) * | 2020-05-21 | 2020-08-25 | 贵州永红航空机械有限责任公司 | Filling material and filling method |
| CN111571291B (en) * | 2020-05-21 | 2021-06-29 | 贵州永红航空机械有限责任公司 | Filling material and filling method |
| CN113560496A (en) * | 2021-08-10 | 2021-10-29 | 贵州安吉航空精密铸造有限责任公司 | Casting forming method for martensitic stainless steel casting |
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Address after: 213011 Wuyi Road, Jiangsu, Changzhou, No. 258 Applicant after: CRRC QISHUYAN INSTITUTE CO., LTD. Address before: 213011 Wuyi Road, Qishuyan District, Jiangsu, China, No. 258, No. Applicant before: Nanche Qisuyan Engine and Vehicle Technics Institute Co., Ltd. |
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Application publication date: 20160224 |
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