CN103521732A - Aluminum-bronze porcelain bushing flange centrifugal casting process - Google Patents

Aluminum-bronze porcelain bushing flange centrifugal casting process Download PDF

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Publication number
CN103521732A
CN103521732A CN201310106671.1A CN201310106671A CN103521732A CN 103521732 A CN103521732 A CN 103521732A CN 201310106671 A CN201310106671 A CN 201310106671A CN 103521732 A CN103521732 A CN 103521732A
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CN
China
Prior art keywords
casting
centrifugal
bronze
aluminium bronze
centrifugal casting
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Application number
CN201310106671.1A
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Chinese (zh)
Inventor
王云翔
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LUOYANG LUOBEI HEAVY INDUSTRY MACHINERY Co Ltd
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LUOYANG LUOBEI HEAVY INDUSTRY MACHINERY Co Ltd
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Application filed by LUOYANG LUOBEI HEAVY INDUSTRY MACHINERY Co Ltd filed Critical LUOYANG LUOBEI HEAVY INDUSTRY MACHINERY Co Ltd
Priority to CN201310106671.1A priority Critical patent/CN103521732A/en
Publication of CN103521732A publication Critical patent/CN103521732A/en
Withdrawn legal-status Critical Current

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Abstract

The invention provides an aluminum-bronze porcelain bushing flange centrifugal casting process and aims to solve the problem that an existing aluminum-bronze porcelain bushing flange cracks in the rolling process and has a large number of defects. The aluminum-bronze porcelain bushing flange centrifugal casting process is characterized in that a centrifugal casting technology is adopted during casting, and the process flow includes the steps of cleaning, casting, demoulding, rough machining and heat treatment. The process solves the problem of rolling cracking, the height of a gasket is adjustable so that flexible production can be realized, and the process has guiding significance for actual production.

Description

The casting process of a kind of aluminium bronze insulator flange centrifugal casting
Technical field
The present invention relates to machine casting field, the casting process of especially a kind of aluminium bronze insulator flange centrifugal casting.
Background technology
Aluminium bronze is the alloy that 20 beginnings of the century just began one's study, grows up, and still, because it has high corrosion resisting property and intensity and the toughness that can compare favourably with steel, thereby has obtained development rapidly, has become now application utmost point copper alloy widely.And occur the situation of roll extrusion fracture when the current condition of production and processing, assembling, and more, the product quality of the product defects of aluminium bronze class material foundry goods was difficult to guarantee in the past.
Summary of the invention
In order to solve current aluminium bronze insulator flange, there is roll extrusion fracture and the many problems of defect, the invention provides the casting process of a kind of aluminium bronze insulator flange centrifugal casting, not only can solve the situation that roll extrusion fracture appears in aluminium bronze insulator flange, and make simply, there is actual directive significance.
The casting process of described a kind of aluminium bronze insulator flange centrifugal casting, is characterized in that: during casting, adopt spun casting technique, its technological process is: the clean → casting → demoulding → roughing → heat treatment.
The casting process of described a kind of aluminium bronze insulator flange centrifugal casting, is characterized in that: cleaning procedure: casting front mold inner surface spary zinc oxide coating, and spary is even, and dry rear use, cleans mould, and its coating formula is: 7% zinc oxide; 2%~3% waterglass; 90% ~ 91% water.
The casting process of described a kind of aluminium bronze insulator flange centrifugal casting, is characterized in that: casting process: cast temperature is controlled at 1100~1200 ℃, and casting adopts mode first quick and back slow, and casting rate is 5~8kg/s, and centrifugal rotational speed is 630~680r/min; It is the cooling procedure of foundry goods that casting ends to shutting down, and for preventing that the early demoulding from causing distortion, be cooled to cast(ing) surface to be black dull redness, and temperature is 590 ℃ ~ 610 ℃ shutdown, the demoulding.
The casting process of described a kind of aluminium bronze insulator flange centrifugal casting, is characterized in that: roughing technique: thin-walled place, flange both sides, diametric(al) one side allowance 3 ~ 5mm; The monolateral allowance 3 ~ 5mm of length direction.
The casting process of described a kind of aluminium bronze insulator flange centrifugal casting, is characterized in that: Technology for Heating Processing: its design parameter is: 600 ~ 700 ℃, keep temperature 4 hours.
The invention has the beneficial effects as follows: not only solved the situation of roll extrusion fracture, and washer height is adjustable, makes flexible production, and actual production is had to directive significance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further detailed.
Fig. 1 is the structure chart of aluminium bronze insulator flange centrifugal casting mould; Fig. 2 is aluminium bronze insulator flange heat treatment cycle curve figure.
Wherein, 1. external mold; 2. pin; 3. front internal mold; 4. rear internal mold; 5. backing plate; 6. packing ring; 7. foundry goods; 8. cover plate.
The specific embodiment
Insulator flange in the critical component of specific embodiment 1:600MW steam turbine generator, after part processing, cylindrical portions wall thickness is 3mm, then together with porcelain vase roll extrusion.
Described a kind of aluminium bronze insulator flange centrifugal casting mould, its structure is: internal mold, external mold 1, backing plate 5, packing ring 6 and cover plate 8, consist of, and internal mold is comprised of front internal mold 3 and rear internal mold 4, external mold 1 adopts multistage cylinder type, and be provided with pin hole at external mold aperture position, with pin 2, be used for fixing cover plate 8; Cover plate 8 connects the front internal mold 3 of tight crimping, internal mold 4 after front internal mold 3 crimping, rear interior 4 mold pressing connection pad plates 5, backing plate 5 crimping packing rings 6; Packing ring 6 is stuck in the reducing place of external mold 1 column type; In the space of front internal mold 3, rear internal mold 4 and backing plate 5, form the shape of aluminium bronze insulator flange.
Aluminium bronze insulator flange centrifugal casting mould casting technique is: in order to improve the cooling velocity of foundry goods and the utilization rate of metal, adopt spun casting explained hereafter.In the situation that strengthening aluminium alloy refining degasification, improving aluminium alloy degree of purity, centrifugal casting can be strengthened the cooling of aluminium alloy, simultaneously under the effect of centrifugal force field, makes oxide slag inclusion in aluminium alloy float on the inner surface of foundry goods, realizes foundry goods directional solidification.
Cleaning procedure: casting front mold inner surface spary zinc oxide coating, spary is even, and dry rear use, cleans mould, and its coating formula is: 7% zinc oxide; 2%~3% waterglass; 90% ~ 91% water.
Casting process: cast temperature is controlled at 1100~1200 ℃, casting adopts mode first quick and back slow, and casting rate is 5~8kg/s, and centrifugal rotational speed is 630~680r/min; It is the cooling procedure of foundry goods that casting ends to shutting down, and for preventing that the early demoulding from causing distortion, be cooled to cast(ing) surface to be black dull redness, and temperature is 590 ℃ ~ 610 ℃ shutdown, the demoulding.
The roughing technique of foundry goods: the copper-alloy casting of centrifugal casting, raw material metal large usage quantity.The blank quality of foundry goods is 1 times or several times after product parts processing often.The reason feedback of the waste product of foundry goods generation simultaneously also not in time, has affected improvement and the manufacturing schedule of product quality, has caused a large amount of wastes, and production cost is increased.
For dealing with problems, foundry goods is carried out to roughing.Allowance and the reduced scale of in process, finding length direction are improper, and the contraction of length direction has reached 1.5%, and the oxide inclusion of the termination of ampco copper sheathing foundry goods is more.Adjust in time, and accumulated experience, for later production lays the foundation.The allowance of length direction and reduced scale are wanted the large of diameter group direction.During roughing, thin-walled place, flange both sides, diametric(al) one side allowance 3 ~ 5mm; The monolateral allowance 3 ~ 5mm of length direction.
Technology for Heating Processing: as Fig. 2, carry out normalized treatment after foundry goods roughing, eliminate hard crisp eutectic, to reach higher plasticity and intensity, its design parameter is: 600 ~ 700 ℃, keep temperature 4 hours.

Claims (5)

1. a casting process for aluminium bronze insulator flange centrifugal casting, is characterized in that: during casting, adopt spun casting technique, its technological process is: the clean → casting → demoulding → roughing → heat treatment.
2. the casting process of a kind of aluminium bronze insulator flange according to claim 1 centrifugal casting, it is characterized in that: cleaning procedure: casting front mold inner surface spary zinc oxide coating, spary is even, dry rear use, mould is cleaned, and its coating formula is: 7% zinc oxide; 2%~3% waterglass; 90% ~ 91% water.
3. the casting process of a kind of aluminium bronze insulator flange according to claim 1 centrifugal casting, it is characterized in that: casting process: cast temperature is controlled at 1100~1200 ℃, casting adopts mode first quick and back slow, and casting rate is 5~8kg/s, and centrifugal rotational speed is 630~680r/min; It is the cooling procedure of foundry goods that casting ends to shutting down, and for preventing that the early demoulding from causing distortion, be cooled to cast(ing) surface to be black dull redness, and temperature is 590 ℃ ~ 610 ℃ shutdown, the demoulding.
4. the casting process of a kind of aluminium bronze insulator flange according to claim 1 centrifugal casting, is characterized in that: roughing technique: thin-walled place, flange both sides, diametric(al) one side allowance 3 ~ 5mm; The monolateral allowance 3 ~ 5mm of length direction.
5. the casting process of a kind of aluminium bronze insulator flange according to claim 1 centrifugal casting, is characterized in that: Technology for Heating Processing: its design parameter is: 600 ~ 700 ℃, keep temperature 4 hours.
CN201310106671.1A 2013-03-29 2013-03-29 Aluminum-bronze porcelain bushing flange centrifugal casting process Withdrawn CN103521732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310106671.1A CN103521732A (en) 2013-03-29 2013-03-29 Aluminum-bronze porcelain bushing flange centrifugal casting process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310106671.1A CN103521732A (en) 2013-03-29 2013-03-29 Aluminum-bronze porcelain bushing flange centrifugal casting process

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CN103521732A true CN103521732A (en) 2014-01-22

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104190898A (en) * 2014-09-22 2014-12-10 中北大学 Extrusion casting method of particle reinforced magnesium matrix composites
CN104368781A (en) * 2014-08-29 2015-02-25 宿松恒达电气配件有限公司 High-pressure flange centrifugal casting technology
CN104785744A (en) * 2015-04-11 2015-07-22 中山市鸿程科研技术服务有限公司 Centrifugal casting technology for high-pressure flange
CN105033575A (en) * 2015-06-23 2015-11-11 中山市鸿程科研技术服务有限公司 Machining technology of high-pressure flange
CN106238708A (en) * 2016-08-23 2016-12-21 张家港华日法兰有限公司 A kind of anti-fracture flange production method
CN108754225A (en) * 2018-08-16 2018-11-06 安徽信息工程学院 The centrifugal casting technique of sleeve type tin bronze component

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005095920A (en) * 2003-09-24 2005-04-14 Japan Steel Works Ltd:The Mold for pouring molten metal and method for producing cast block
CN101357396A (en) * 2007-07-30 2009-02-04 中信重工机械股份有限公司 Large double-flange copper alloy bearing-bush chilling striking-sand centrifugal casting technique
CN102581249A (en) * 2012-03-20 2012-07-18 哈尔滨理工大学 Centrifugal casting method of aluminum alloy impeller
CN102773445A (en) * 2012-07-12 2012-11-14 武汉泛洲中越合金有限公司 Process for reducing shrinkage porosity of tin bronze under centrifugal casting process
CN202725959U (en) * 2012-03-29 2013-02-13 江苏兄弟活塞有限公司 Heat preservation gating system for casting aluminum piston blank

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005095920A (en) * 2003-09-24 2005-04-14 Japan Steel Works Ltd:The Mold for pouring molten metal and method for producing cast block
CN101357396A (en) * 2007-07-30 2009-02-04 中信重工机械股份有限公司 Large double-flange copper alloy bearing-bush chilling striking-sand centrifugal casting technique
CN102581249A (en) * 2012-03-20 2012-07-18 哈尔滨理工大学 Centrifugal casting method of aluminum alloy impeller
CN202725959U (en) * 2012-03-29 2013-02-13 江苏兄弟活塞有限公司 Heat preservation gating system for casting aluminum piston blank
CN102773445A (en) * 2012-07-12 2012-11-14 武汉泛洲中越合金有限公司 Process for reducing shrinkage porosity of tin bronze under centrifugal casting process

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104368781A (en) * 2014-08-29 2015-02-25 宿松恒达电气配件有限公司 High-pressure flange centrifugal casting technology
CN104190898A (en) * 2014-09-22 2014-12-10 中北大学 Extrusion casting method of particle reinforced magnesium matrix composites
CN104785744A (en) * 2015-04-11 2015-07-22 中山市鸿程科研技术服务有限公司 Centrifugal casting technology for high-pressure flange
CN105033575A (en) * 2015-06-23 2015-11-11 中山市鸿程科研技术服务有限公司 Machining technology of high-pressure flange
CN106238708A (en) * 2016-08-23 2016-12-21 张家港华日法兰有限公司 A kind of anti-fracture flange production method
CN108754225A (en) * 2018-08-16 2018-11-06 安徽信息工程学院 The centrifugal casting technique of sleeve type tin bronze component

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Application publication date: 20140122

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