CN107363221A - A kind of casting technique of planet carrier - Google Patents

A kind of casting technique of planet carrier Download PDF

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Publication number
CN107363221A
CN107363221A CN201610312199.0A CN201610312199A CN107363221A CN 107363221 A CN107363221 A CN 107363221A CN 201610312199 A CN201610312199 A CN 201610312199A CN 107363221 A CN107363221 A CN 107363221A
Authority
CN
China
Prior art keywords
casting
planet carrier
rising head
housing
loam core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610312199.0A
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Chinese (zh)
Inventor
丁先华
朱亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nantong Huadong Hydraulic Technology Co Ltd
Original Assignee
Nantong Huadong Hydraulic Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nantong Huadong Hydraulic Technology Co Ltd filed Critical Nantong Huadong Hydraulic Technology Co Ltd
Priority to CN201610312199.0A priority Critical patent/CN107363221A/en
Publication of CN107363221A publication Critical patent/CN107363221A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/08Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/088Feeder heads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/10Cores; Manufacture or installation of cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/22Moulds for peculiarly-shaped castings
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron
    • C21C1/10Making spheroidal graphite cast-iron
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/08Making cast-iron alloys

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

The invention discloses a kind of casting technique of planet carrier, comprise the following steps:Moulding process:Housing is made, rising head is set in the top center of housing;Loam core is made, the loam core polished is lain in a horizontal plane in the inside center of housing;Sandbox is made, controls the mold thickness of sandbox in 20 30mm;Smelting metal liquid process:First raw material are put into smelting furnace and carry out melting, nodulizer is then added thereto and carries out spheroidising, finally add inovulant and carry out inoculation;Casting molding procedure:The teeming pouring technology molten metal intake using top rising head is poured into housing by rising head;Casting treatment process:Casting is polished and is heat-treated.The present invention reasonably by a dead head top water-injecting technological system, both solves the problems, such as filling and feeding, simplifies production operation again, and casting process yield reaches more than 85%.

Description

A kind of casting technique of planet carrier
Technical field
The present invention relates to planet carrier casting technology field, more particularly to a kind of casting technique of planet carrier.
Background technology
Planet carrier is one of main member of planetary transmission, and planet wheel spindle or bearing are mounted in planet On frame, when planetary gear is as basic building block, it is that the maximum part of external force torque, planet are born in mechanism The structure of frame, mainly it is made up of the dowel of upper disk, lower wall and the upper and lower disk of connection, upper disk and lower wall exist Stagger dowel position on be correspondingly provided with planet axis hole, the center of upper and lower disk is equipped with central shaft hole.
Planet carrier mainly uses casting, higher to the quality requirement of planet carrier in casting cycle.From technology It is required that, material, design feature analysis, production planet carrier mainly have following difficult point:Casting is high intensity spheroidal graphite Cast iron, smelting process and operation difficulty are very high;Dimensional accuracy, surface quality requirements are high;Connection on casting Muscle portion point is thicker big, and the casting flaws such as shrinkage porosite, shrinkage cavity are easily formed at the position, and Internal Quality of Cast is difficult to protect Card.
In order to avoid the shrinkage cavity occurred in casting cycle and shrinkage porosite phenomenon, use in the prior art in heat energy-saving position Internal densener is laid, but in the case of batch production, thermal center placement chill is stood very not to many places arc of casting It is convenient, and contoured chill is manufactured and reclaimed and all has difficulties;In addition, also use in the prior art Feeding head is set on mould, and feeding head is connected by ring gate, because rising head volume is big, is poured Road is grown, and rising head, cast gate and the running channel of every blank need weight of molten iron big, cause the waste of molten iron, technique Yield rate is very low, the cost increase of every product.
Therefore, a kind of casting technique of planet carrier is researched and developed, the product yield and can that can either improve casting reaches Avoid casting quality defect, it appears increasingly important.
The content of the invention
The purpose of the present invention is that a kind of casting technique of planet carrier is provided the defects of presence for prior art, both The product yield and can that casting can be improved enough avoids casting quality defect.
In order to solve the above-mentioned technical problem, the invention provides a kind of casting technique of planet carrier, including it is following Step:S1, moulding process:Housing is made, rising head is set in the top center of the housing;Make loam core, Loam core is polished after completing, and the loam core polished is lain in a horizontal plane in the inside center of the housing; Sandbox is made, controls the mold thickness of sandbox the housing to be embedded in the sandbox in 20-30mm;S2、 Smelting metal liquid process:Raw material are put into smelting furnace first and carry out melting, then add nodulizer thereto Spheroidising is carried out, inovulant is finally added and carries out inoculation;S3, casting molding procedure:Using top The teeming pouring technology of portion rising head water inlet, molten metal in the step S2 is poured into by the rising head described Planet carrier casting is produced in housing, after cooling and shaping;S4, casting treatment process:By the casting in step S3 Polished and be heat-treated, finally give planet carrier.
Further, in the step S1, the housing includes upper shell and lower house, the upper shell and The die cavity of planet carrier, the lower end of the rising head and the die cavity are formed after the lower house matched moulds with the loam core Upper end communicate;The loam core has the loam core I for being used for forming planet carrier top center axis hole, the rising head Positioned at the surface of the loam core I.
Preferably, the rising head one and only one.
Preferably, the rising head is heat preservation rising head.
Preferably, a diameter of 90mm of the rising head, it is highly 120mm.
Preferably, the loam core outside hot box by being molded as.
Preferably, in the step S2, nodularization is carried out using angstrom willing board La containing a lanthanum nodulizers.
The casting technique of the planet carrier of the present invention, has the advantages that:
1st, loam core is made using hot box external mold in moulding process of the invention, housing includes upper shell and lower casing Body, upper shell are provided with a 90 × 120mm of Φ on the position corresponding with planet carrier top center axis hole Heat preservation rising head carry out feeding, and using the pouring technology that teeming cast is carried out from the rising head, allow molten iron Disperse everywhere, make the principle solidification that casting solidifies in order, the defects of eliminating internal shrinkage, shrinkage porosite.
2nd, special shape mo(u)lding box is newly made in moulding process of the invention, controls the mold thickness of casting and sandbox to exist 20-30mm, the quick freezing action of chill is played by sandbox so as to improve the feeding effect of casting, reduce casting contracting Hole, shrinkage defect.
3rd, nodularization is carried out using angstrom willing board La containing a lanthanum nodulizers in smelting metal liquid process of the invention, makes iron Water shrinks steadily, prevents casting from producing shrinkage cavity and porosity phenomenon.
4th, the present invention can solve the problems, such as filling and feeding reasonably by a dead head top water-injecting technological system, Production operation can be simplified again.It is other at dowel thermal center etc. by being found after test of many times and anatomical slice Position is all without shrinkage porosite, shrinkage cavity phenomenon, and outward appearance is clearly better, while cleaning process is also fairly simple.Reduce The labor intensity of worker, and casting process yield reaches more than 85%.
Brief description of the drawings
, below will be in embodiment or description of the prior art in order to illustrate more clearly of technical scheme The required accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only this hair Some bright embodiments, for those of ordinary skill in the art, do not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the mould structure schematic diagram in the moulding process of the present invention.
Wherein, reference corresponds in figure:1- housings, 2- rising heads.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in inventive embodiments is carried out it is clear, It is fully described by, it is clear that described embodiment is only part of the embodiment of the present invention, rather than all Embodiment.Based on embodiments of the invention, those of ordinary skill in the art are not making creative work On the premise of the every other embodiment that is obtained, belong to the scope of protection of the invention.
The invention provides a kind of casting technique of planet carrier, comprise the following steps:
S1, moulding process (as shown in Figure 1):Housing 1 is made, is set in the top center of the housing 1 One and only one a diameter of 90mm, the highly rising head 2 for 120mm, the rising head 2 emit for heat preservation Mouthful;By film production loam core outside hot box, loam core is polished after completing, the loam core water that will have been polished Inside center of the placing flat in the housing 1;Sandbox is made, controls the mold thickness of sandbox in 20-30mm, The housing 1 is embedded in the sandbox, specific attachment structure is as follows:The housing 1 includes upper shell And lower house, the die cavity of planet carrier, institute are formed after the upper shell and the lower house matched moulds with the loam core The lower end for stating rising head 2 communicates with the upper end of the die cavity;The loam core, which has, to be used to be formed in planet carrier top The loam core I of arbor hole, the rising head 2 are located at the surface of the loam core I.
S2, smelting metal liquid process:Raw material are put into smelting furnace first and carry out melting, are then added thereto Enter nodulizer and carry out spheroidising, finally add inovulant and carry out inoculation, wherein, the nodulizer is adopted Nodularization is carried out with angstrom willing board La containing a lanthanum nodulizers.
S3, casting molding procedure:The teeming pouring technology intake using top rising head, by the step S2 Molten metal is poured into the housing 1 by the rising head 2, allows molten iron to disperse everywhere, makes casting in order The principle solidification of solidification, the defects of eliminating internal shrinkage, shrinkage porosite, produces planet carrier casting after cooling and shaping;
S4, casting treatment process:Casting in step S3 is polished and is heat-treated, finally gives planet Frame.
The important technological parameters for the planet carrier produced with present invention process are as follows:
(1) material:QT600-3
(2) tensile strength:≥600Mpa
(3) yield strength:≥370Mpa
(4) elongation percentage:>=3%
(5) hardness:HB190-270
(6) nodulizing grade:>=3 grades
(7) Oxygen potential:>=85%
(8) content of pearlite in alloy:>=70%
(9) cast-internal without slag inclusion, stomata, without the casting flaw phenomenon such as shrinkage cavity shrinkage porosity, spalling
(10) substance:14.2kg
The casting technique of the planet carrier of the present invention, has the advantages that:
1st, loam core is made using hot box external mold in moulding process of the invention, housing includes upper shell and lower casing Body, upper shell are provided with a 90 × 120mm of Φ on the position corresponding with planet carrier top center axis hole Heat preservation rising head carry out feeding, and using the pouring technology that teeming cast is carried out from the rising head, allow molten iron Disperse everywhere, make the principle solidification that casting solidifies in order, the defects of eliminating internal shrinkage, shrinkage porosite.
2nd, special shape mo(u)lding box is newly made in moulding process of the invention, controls the mold thickness of casting and sandbox to exist 20-30mm, the quick freezing action of chill is played by sandbox so as to improve the feeding effect of casting, reduce casting contracting Hole, shrinkage defect.
3rd, nodularization is carried out using angstrom willing board La containing a lanthanum nodulizers in smelting metal liquid process of the invention, makes iron Water shrinks steadily, prevents casting from producing shrinkage cavity and porosity phenomenon.
4th, the present invention can solve the problems, such as filling and feeding reasonably by a dead head top water-injecting technological system, Production operation can be simplified again.It is other at dowel thermal center etc. by being found after test of many times and anatomical slice Position is all without shrinkage porosite, shrinkage cavity phenomenon, and outward appearance is clearly better, while cleaning process is also fairly simple.Reduce The labor intensity of worker, and casting process yield reaches more than 85%.
Above disclosed is only presently preferred embodiments of the present invention, can not limit the present invention with this certainly Interest field, therefore equivalent variations made according to the claims in the present invention, still belong to the model that the present invention is covered Enclose.

Claims (7)

1. a kind of casting technique of planet carrier, it is characterised in that comprise the following steps:
S1, moulding process:Housing (1) is made, rising head (2) is set in the top center of the housing (1); Loam core is made, loam core is polished after completing, and the loam core polished is lain in a horizontal plane in into the housing (1) Inside center;Sandbox is made, controls the mold thickness of sandbox in 20-30mm, the housing (1) is embedded In the sandbox;
S2, smelting metal liquid process:Raw material are put into smelting furnace first and carry out melting, are then added thereto Enter nodulizer and carry out spheroidising, finally add inovulant and carry out inoculation;
S3, casting molding procedure:The teeming pouring technology intake using top rising head, by the step S2 Molten metal is poured into the housing (1) by the rising head (2), and planet carrier casting is produced after cooling and shaping Part;
S4, casting treatment process:Casting in step S3 is polished and is heat-treated, finally gives planet Frame.
2. the casting technique of planet carrier according to claim 1, it is characterised in that in the step S1, The housing (1) includes upper shell and lower house, after the upper shell and the lower house matched moulds with the mud Core forms the die cavity of planet carrier, and the lower end of the rising head (2) communicates with the upper end of the die cavity;The loam core With the loam core I for forming planet carrier top center axis hole, the rising head (2) is located at the loam core I Surface.
3. the casting technique of planet carrier according to claim 2, it is characterised in that the rising head (2) One and only one.
4. the casting technique of planet carrier according to claim 3, it is characterised in that the rising head (2) For heat preservation rising head.
5. the casting technique of the planet carrier according to any one claim in claim 2-4, its feature It is, a diameter of 90mm of the rising head (2), is highly 120mm.
6. the casting technique of planet carrier according to claim 5, it is characterised in that the loam core passes through Hot box is molded as outside.
7. the casting technique of planet carrier according to claim 1, it is characterised in that in the step S2, Nodularization is carried out using angstrom willing board La containing a lanthanum nodulizers.
CN201610312199.0A 2016-05-12 2016-05-12 A kind of casting technique of planet carrier Pending CN107363221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610312199.0A CN107363221A (en) 2016-05-12 2016-05-12 A kind of casting technique of planet carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610312199.0A CN107363221A (en) 2016-05-12 2016-05-12 A kind of casting technique of planet carrier

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Publication Number Publication Date
CN107363221A true CN107363221A (en) 2017-11-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114101581A (en) * 2021-10-21 2022-03-01 浙江林家昌隆阀门铸造有限公司 Casting heat preservation method
CN115041634A (en) * 2022-03-27 2022-09-13 宁波拓铁机械有限公司 Casting method of wind power planet carrier casting

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235637A1 (en) * 1992-10-22 1994-04-28 Zahnradfabrik Friedrichshafen Prodn. of planetary supports for epicyclic gears for automobiles etc. - includes basic body produced by cold box process with inserted cores for openings in planetary support
CN101628323A (en) * 2009-08-07 2010-01-20 通州市四安球墨铸铁有限公司 Casting process of nodular cast iron planet carrier
CN202239501U (en) * 2011-10-17 2012-05-30 田旭明 Planet carrier casting mould
CN103600035A (en) * 2013-03-06 2014-02-26 南通华东油压科技有限公司 Manufacturing technology of walking machinery bracket casting
CN104084540A (en) * 2014-08-05 2014-10-08 临沂格凌精密机械制造有限公司 Planet carrier casting method
CN104174819A (en) * 2014-08-22 2014-12-03 常熟市虹桥铸钢有限公司 Casting technology for three-stage planetary frame of ocean platform climbing machine
CN104439096A (en) * 2014-09-15 2015-03-25 宝鼎重工股份有限公司 Casting forming mould and method of planet carrier for lifting gearbox of self-elevating offshore platform

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235637A1 (en) * 1992-10-22 1994-04-28 Zahnradfabrik Friedrichshafen Prodn. of planetary supports for epicyclic gears for automobiles etc. - includes basic body produced by cold box process with inserted cores for openings in planetary support
CN101628323A (en) * 2009-08-07 2010-01-20 通州市四安球墨铸铁有限公司 Casting process of nodular cast iron planet carrier
CN202239501U (en) * 2011-10-17 2012-05-30 田旭明 Planet carrier casting mould
CN103600035A (en) * 2013-03-06 2014-02-26 南通华东油压科技有限公司 Manufacturing technology of walking machinery bracket casting
CN104084540A (en) * 2014-08-05 2014-10-08 临沂格凌精密机械制造有限公司 Planet carrier casting method
CN104174819A (en) * 2014-08-22 2014-12-03 常熟市虹桥铸钢有限公司 Casting technology for three-stage planetary frame of ocean platform climbing machine
CN104439096A (en) * 2014-09-15 2015-03-25 宝鼎重工股份有限公司 Casting forming mould and method of planet carrier for lifting gearbox of self-elevating offshore platform

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114101581A (en) * 2021-10-21 2022-03-01 浙江林家昌隆阀门铸造有限公司 Casting heat preservation method
CN115041634A (en) * 2022-03-27 2022-09-13 宁波拓铁机械有限公司 Casting method of wind power planet carrier casting
CN115041634B (en) * 2022-03-27 2023-07-18 宁波拓铁机械有限公司 Casting method of wind power planet carrier casting

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Application publication date: 20171121