CN104226915A - Casting method of hollow shaft and casting mold - Google Patents

Casting method of hollow shaft and casting mold Download PDF

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Publication number
CN104226915A
CN104226915A CN201410501134.1A CN201410501134A CN104226915A CN 104226915 A CN104226915 A CN 104226915A CN 201410501134 A CN201410501134 A CN 201410501134A CN 104226915 A CN104226915 A CN 104226915A
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CN
China
Prior art keywords
casting
mold
rising head
quill shaft
running channel
Prior art date
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Granted
Application number
CN201410501134.1A
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Chinese (zh)
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CN104226915B (en
Inventor
谢驰中
刘友成
文建华
杨斌
胡杰
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Hengyang Sino-Steel Hengzhong Casting & Forging Co Ltd
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Hengyang Sino-Steel Hengzhong Casting & Forging Co Ltd
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Priority to CN201410501134.1A priority Critical patent/CN104226915B/en
Publication of CN104226915A publication Critical patent/CN104226915A/en
Application granted granted Critical
Publication of CN104226915B publication Critical patent/CN104226915B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a casting mold of a hollow shaft and a casting method. The casting mold comprises an outer casting mold, an inner casting mold (2), a pouring gate system and a feed head mold, wherein the outer casting mold comprises an outer mold sand mold (12); an inner mold mounting cavity (13) is defined inside the outer mold sand mold (12); a bottom-cushioning cold mold (14) is arranged at the lower part of the outer mold sand mold (12); a neck cold mold (15) is arranged in the middle of the outer mold sand mold (12); the inner casting mold (2) is mounted in the inner mold mounting cavity (13) of the outer casting mold; a hollow shaft casting cavity (133) is defined between the outer casting mold and the inner casting mold (2); the feed head mold comprises a feed head sand mold (42); a feed head (421) is arranged on the feed head sand mold (42); the upper end of the outer mold sand mold (12) is stretched outside the feed head (421). The hollow shaft cast by the method is free of the casting defects such as shrinkage cavity in the neck, shrinkage porosity, flaws, coarse crystals and inclusions; the properties of the hollow shaft can be improved.

Description

The casting method of quill shaft and casting die
Technical field
The present invention relates to casting method and the casting die of a kind of manufacture method and dedicated manufacturing equipment of parts of cement grinding mill, particularly a kind of quill shaft.
Background technology
Cement grinding mill is the visual plant in cement plant, and quill shaft is then its very crucial parts.Quill shaft subjects the running dynamic loading of whole mill body and abrasive body, runs continuously under alternate stress effect, is the weakest link of cement grinding mill body.Therefore, whether the casting of quill shaft and crudy directly affect grinding machine can long-term safety running.
At present, the casting exploitation difficult point of quill shaft is mainly: collar circle of position angle is greatly thick, easily produces the defects such as crystalline substance is thick, crackle, field trash; Axle body position is elongated, and feeding distance is long, and Feeding channel is not smooth, easily produces the defects such as shrinkage cavity and porosity.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art and provide a kind of casting die of quill shaft, the quill shaft utilizing it to cast there will not be the casting flaw such as neck shrinkage cavity and porosity, crackle, brilliant thick, field trash, can improve the performance of quill shaft.
Another object of the present invention is to provide a kind of casting method of quill shaft, and it can promote that quill shaft realizes consecutive solidification, the casting flaw such as prevent shrinkage cavity and porosity, be mingled with; Reduce quill shaft neck stress to concentrate, effectively prevent the generation of crackle; Its condensation is fast, and the process-cycle is short, production cost is low.
Technical scheme of the present invention is: a kind of casting die of quill shaft, and it comprises casting external mold, casting internal mold, runner system and rising head mould; Casting external mold comprises outer model sand mold, and be provided with internal mold installation cavity in outer model sand mold, the peripheral shape of internal mold installation cavity is consistent with the profile of the quill shaft that will cast, and the top of internal mold installation cavity is hollow shaft flange casting cavity, and bottom is quill shaft main shaft casting cavity; The upper bottom periphery in internal mold installation cavity of outer model sand mold is provided with the cold mould of heelpiece, and the cold mould of heelpiece is metal pattern; Outer model sand mold is upper is provided with the cold mould of neck in quill shaft main shaft casting cavity and hollow shaft flange casting cavity junction, and the cold mould of neck is metal pattern; The profile of casting internal mold is be consistent with the shape of the inner chamber of the quill shaft that will cast, and it is installed in the internal mold installation cavity of casting external mold, forms the quill shaft casting cavity being used for cast hollow axle between casting external mold and casting internal mold; Runner system is arranged in casting external mold and casting internal mold; Rising head mould comprises rising head sand mold, and rising head sand mold is arranged on above casting external mold, and rising head sand mold is provided with and casts external mold and cast the corresponding rising head of the quill shaft casting cavity that formed between internal mold, and the upper end of outer model sand mold (12) is stretched out from rising head.
The further technical scheme of the present invention is: the position that the lower end of described casting internal mold is corresponding with the cold mould of heelpiece on casting external mold is provided with the cold mould in the interior end; The cold mould of heelpiece, the cold mould of neck, the cold mould in the interior end are annular swage.
The present invention further technical scheme is: described casting external mold also comprises outer moulding box, and outer model sand mold is located in outer moulding box; Outer model sand mold is upper is provided with cracking strip casting cavity extending longitudinally in quill shaft main shaft casting cavity and hollow shaft flange casting cavity junction.
The present invention further technical scheme is: described runner system comprises note running channel and transmission running channel in siphon runner, rising head, it is laid in the bottom of outer model sand mold, its outlet is located at the bottom of the internal mold installation cavity of outer model sand mold, and the other end of siphon runner is connected with transmission running channel; In rising head, note running channel is installed in casting internal mold, and in rising head, the outlet of note running channel corresponds to the rising head place of rising head mould, and the other end of each interior note running channel is connected with transmission running channel; Transmission running channel comprises sprue and cross gate, sprue is vertically arranged in casting external mold and casting internal mold, the sprue of the sprue and casting internal mold that are arranged in casting external mold connects, and cross gate is transversely arranged in casting external mold and casting internal mold, and is connected with sprue.
The present invention also further technical scheme is: the flange face that described rising head sand mold corresponds to the quill shaft that will cast is provided with blind riser near the position at edge.
The further technical scheme of the present invention is: siphon runner is four, and the outlet of four siphon runners is circumferentially uniform; In rising head, note running channel is three, and three outlets of noting running channel in three are circumferentially distributed on casting side, internal mold place; The wall of quill shaft casting cavity and rising head is also coated be brushed with and covers layer of sand and alcohol zircon flour coating layer; Rising head mould also comprises rising head case, and rising head sand mold is installed in rising head case; Blind riser is eight to ten, and each blind riser is circumferentially uniform.
Another technical scheme of the present invention is: a kind of casting method of quill shaft, and it comprises following processing step:
One, modeling
Choose the casting die of above-mentioned quill shaft;
Two, melting
Smelting metal casting liquid;
Three, pour into a mould
Through transmission running channel first to siphon runner (31) transferring metal casting liquid, after 3/2 to five/5ths height that metal casting liquid making is poured into rising head (421), in rising head, note running channel (32) transferring metal casting liquid through transmission running channel again, the liquid making of injection metal casting is full to rising head (421);
Four, bulk processing
Be incubated five to eight days, depanning, utilize the waste heat heat of foundry goods to cut rising head casting mold; Foundry goods is entered kiln and carry out normalizing and tempering process, the quill shaft of casting can be obtained.
The present invention further another technical scheme is: described metal casting liquid making is molten steel; Step 2 smelting temperature is 1540 ~ 1560 DEG C; When temperature when quill shaft afterheat of casting heat cuts rising head is 350 ~ 450 DEG C.
The present invention compared with prior art has following features:
In the rising head of 1, casting die of the present invention, note running channel is arranged up and down with siphon runner, makes first to carry out rising pouring during cast, and it is steady that molten steel fills type, is conducive to exhaust and collects slag; After carry out upper note, be conducive to changing the reverse sequence that causes of rising pouring and solidify, can riser supplement shrink efficiency be improved simultaneously.
2, the cold mould of the neck of casting die of the present invention, can accelerate the fillet position cooling velocity of foundry goods (i.e. quill shaft foundry goods, lower same), effectively anti-position crackle here; The cold mould of the cold mould of heelpiece and the interior end, can accelerate foundry goods bottom coohng speed, formation temperature gradient, extend riser feeding distance.
3, the feed-ring of casting die of the present invention ensures that each position of quill shaft foundry goods obtains abundant feeding, thoroughly solves annular cast without end region problem, guarantees that cast-internal is without defects such as shrinkage cavity shrinkage porosities, be beneficial to gas and field trash in molten steel and discharge from rising head smoothly.
4, the blind riser of casting die of the present invention can reduce cast-internal field trash.The large plane of quill shaft foundry goods is when pouring into a mould, and the field trash in molten steel easily floats up to upper surface, and field trash can be focused in blind riser mouth, thus decreases cast-internal field trash.
5, the cracking strip casting cavity of casting die of the present invention can form cracking strip on foundry goods, prevent foundry goods in contraction process, flange in the bottom is subject to the obstruction of molding sand to axle journal fillet position and produces mechanical stress, and minimizing flange in the bottom fillet and axle journal fillet crack.
In order to be illustrated more clearly in the present invention, enumerate following examples, but it is without any restrictions to scope of invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of the casting die of quill shaft of the present invention;
Fig. 2 is the structural representation of the casting external mold of quill shaft of the present invention;
Fig. 3 is the structural representation of the casting internal mold of quill shaft of the present invention;
Fig. 4 is the structural representation of the rising head mould of quill shaft of the present invention.
Detailed description of the invention
embodiment 1
As Figure 1-4, a kind of casting die of quill shaft, it comprises casting external mold, casting internal mold 2, runner system and rising head mould.
Casting external mold comprises outer moulding box 11 and outer model sand mold 12, and outer model sand mold 12 is located in outer moulding box 11, is provided with internal mold installation cavity 13 in outer model sand mold 12, and the peripheral shape of internal mold installation cavity 13 is consistent (basically identical) with the profile of the quill shaft that will cast; Internal mold installation cavity 13 is divided into quill shaft main shaft casting cavity 131 and hollow shaft flange casting cavity 132, and hollow shaft flange casting cavity 132 is positioned at quill shaft main shaft casting cavity 131 top, and namely top is hollow shaft flange casting cavity 132, and bottom is quill shaft main shaft casting cavity 131;
The bottom periphery outer model sand mold 12 being positioned at internal mold installation cavity 13 is provided with annular (can be jagged, can be even that multi sphere section is spliced) the cold mould 14 of heelpiece, the cold mould 14 of heelpiece is metal pattern, namely why be called the reason of " cold mould ", metal is convenient to heat radiation, preferably adopt swage, its low price, during by its cast hollow axle, good cooling effect, can Quench quill shaft, expand quill shaft area of dissipation and reduce quill shaft modulus, the cold mould 14 of heelpiece also can be accelerated foundry goods and (refer to the quill shaft foundry goods that will cast, lower same) bottom coohng speed, formation temperature gradient, realize consecutive solidification, extend riser feeding distance, outer model sand mold 12 is positioned at quill shaft main shaft casting cavity 131 and hollow shaft flange casting cavity 132 junction is provided with cracking strip casting cavity (accompanying drawing does not illustrate) extending longitudinally, cracking strip casting cavity can at the neck formation cracking strip of the quill shaft cast, cracking strip can prevent foundry goods in contraction process, hollow shaft flange to the neck fillet position of quill shaft main shaft is subject to the obstruction of molding sand and produces mechanical stress, reduces hollow shaft flange fillet and quill shaft trunnion fillet cracks,
Being provided with annular (can be jagged outer model sand mold 12 to be positioned at quill shaft main shaft casting cavity 131 and hollow shaft flange casting cavity 132 junction (namely forming the neck place of hollow shaft flange and quill shaft main shaft), can be even multi sphere section splicing) the cold mould 15 of neck, the cold mould 15 of neck is metal pattern, be preferably swage, the cold mould 15 of neck can accelerate the neck cooling velocity of the quill shaft cast, and effectively prevents neck crackle.
The profile of casting internal mold 2 is be consistent with the shape of the inner chamber of the quill shaft that will cast, it generally adopts molding sand to be made, it is installed in the internal mold installation cavity 13 of casting external mold, forms the part that the quill shaft casting cavity 133(quill shaft casting cavity 133 being used for cast hollow axle is actually internal mold installation cavity 13 between casting external mold and casting internal mold 2); The position that the lower end of casting internal mold 2 is corresponding with the cold mould of heelpiece 14 on casting external mold is provided with the cold mould 21 in the end in annular, cold mould 21 metal pattern of the interior end, be preferably swage, the cold mould in the interior end 21 matches with the cold mould 14 of heelpiece, the thermograde that further formation is larger, realize significant consecutive solidification, extend riser feeding distance better;
Runner system comprises note running channel 32 and transmission running channel in siphon runner 31, rising head, siphon runner 31 is four, it is laid in the bottom of outer model sand mold 12, its outlet is located at the bottom (i.e. the bottom place of quill shaft casting cavity 133) of the internal mold installation cavity 13 of outer model sand mold 12, the outlet of multiple siphon runner 31 is circumferentially uniform, the other end of siphon runner 31 is connected with transmission running channel (and inside is communicated with), can realize rising pouring by siphon runner 31; In rising head, note running channel 32 is three, in rising head, note running channel 32 is installed in casting internal mold 2, in rising head, the outlet of note running channel 32 corresponds to the rising head place of rising head mould, three outlets of noting running channel in three are circumferentially distributed on casting side, internal mold 2 place, and the other end of each interior note running channel is connected (inside is communicated with) with transmission running channel; Transmission running channel comprises sprue 331 and cross gate 332, sprue 331 is vertically arranged in casting external mold and casting internal mold 2, the sprue 331 of the sprue 331 and casting internal mold 2 that are arranged in casting external mold connects, cross gate 332 is transversely arranged in casting external mold and casting internal mold 2, and be connected with sprue 331, sprue 331 has one end to stretch out outside casting internal mold 2 or casting external mold, and this end is connected with cup, is convenient to pour steel (or other metal casting liquid making).
Rising head mould comprises rising head case 41 and rising head sand mold 42, rising head sand mold 42 is installed in rising head case 41, rising head sand mold 42 is provided with and casts external mold and cast the corresponding rising head 421 of the quill shaft casting cavity that formed between internal mold 2, the upper end of outer model sand mold 12 is stretched out from rising head 421, makes rising head sand mold 42 form annular with the rising head 421 of outer model sand mold 12; The flange face that rising head sand mold 42 corresponds to the quill shaft that will cast is provided with eight to ten blind risers 422 near the position at edge, and each blind riser 422 is uniform along (rising head sand mold 42) circumference, and blind riser 422 top is also provided with venthole.
Quill shaft casting cavity 133 is also coated with to be brushed with and covers layer of sand and alcohol zircon flour coating layer to the wall of rising head (rising head 421, blind riser 422) (is namely cast external mold, cast internal mold 2 top layer corresponding to rising head mould).
During casting, melting molten steel (or other metal casting liquid making, lower same), pour steel temperature is 1540 ~ 1560 DEG C;
First carry out rising pouring, it is steady that molten steel fills type, is conducive to exhaust collection slag; After carry out upper note, be conducive to changing the reverse sequence that causes of rising pouring and solidify, can riser supplement shrink efficiency be improved simultaneously; Namely first carry molten steel to siphon runner 31 through transmission running channel, after pouring molten steel to 3/2 to five/5ths (being preferably 1/2nd) height of rising head 421, then in rising head, note running channel 32 through transmission running channel and carry molten steel, inject molten steel full to rising head 421;
Be incubated five to eight days (being generally about six days), depanning, when hollow axle casting part temperature is at 350 ~ 450 DEG C, utilize the waste heat heat of foundry goods (the quill shaft foundry goods that finger-type becomes is slightly bad, lower same) to cut rising head casting mold (casting mold formed in rising head 421); Foundry goods is entered kiln and carry out normalizing and tempering process, heat treatment is complete cuts off lacing wire, can obtain quill shaft cast member; Carry out fine finishining again, obtain quill shaft.
Casting die of the present invention and casting method are mainly used in the casting of big-and-middle-sized quill shaft, but are not limited to the casting of big-and-middle-sized quill shaft, can be used for the casting of any quill shaft.
The present invention is not limited to above-mentioned concrete structure, as long as adopt the casting die identical or equivalent with the present invention or/and the quill shaft casting method of processing step is or/and casting die just drops within protection scope of the present invention.

Claims (10)

1. a casting die for quill shaft, it comprises casting external mold, casting internal mold (2), runner system and rising head mould; Casting external mold comprises outer model sand mold (12), internal mold installation cavity (13) is provided with in outer model sand mold (12), the peripheral shape of internal mold installation cavity (13) is consistent with the profile of the quill shaft that will cast, the top of internal mold installation cavity (13) is hollow shaft flange casting cavity (132), and bottom is quill shaft main shaft casting cavity (131); It is characterized in that: the bottom periphery outer model sand mold (12) being positioned at internal mold installation cavity (13) is provided with the cold mould of heelpiece (14), and the cold mould of heelpiece (14) is metal pattern; Outer model sand mold (12) is positioned at quill shaft main shaft casting cavity (131) and hollow shaft flange casting cavity (132) junction is provided with the cold mould of neck (15), the cold mould of neck (15) is metal pattern; The profile of casting internal mold (2) is be consistent with the shape of the inner chamber of the quill shaft that will cast, it is installed in the internal mold installation cavity (13) of casting external mold, forms the quill shaft casting cavity (133) being used for cast hollow axle between casting external mold and casting internal mold (2); Runner system is arranged in casting external mold and casting internal mold (2); Rising head mould comprises rising head sand mold (42), rising head sand mold (42) is arranged on above casting external mold, rising head sand mold (42) is provided with and casts external mold and cast the corresponding rising head (421) of the quill shaft casting cavity that formed between internal mold (2), and the upper end of outer model sand mold (12) is stretched out from rising head (421).
2. the casting die of quill shaft according to claim 1, is characterized in that: the position that the lower end of described casting internal mold (2) is corresponding with the cold mould of heelpiece (14) on casting external mold is provided with the cold mould in the interior end (21); The cold mould of heelpiece (14), the cold mould of neck (15), the cold mould in the interior end (21), are annular swage.
3. the casting die of quill shaft according to claim 1 and 2, is characterized in that: described casting external mold also comprises outer moulding box (11), and outer model sand mold (12) is located in outer moulding box (11); Outer model sand mold (12) is positioned at quill shaft main shaft casting cavity (131) and hollow shaft flange casting cavity (132) junction is provided with cracking strip casting cavity extending longitudinally.
4. the casting die of quill shaft according to claim 1 and 2, it is characterized in that: described runner system comprises note running channel (32) and transmission running channel in siphon runner (31), rising head, it is laid in the bottom of outer model sand mold (12), its outlet is located at the bottom of the internal mold installation cavity (13) of outer model sand mold (12), and the other end of siphon runner (31) is connected with transmission running channel; In rising head, note running channel (32) is installed in casting internal mold (2), and in rising head, the outlet of note running channel (32) corresponds to rising head (421) place of rising head mould, and the other end of each interior note running channel is connected with transmission running channel; Transmission running channel comprises sprue (331) and cross gate (332), sprue (331) is vertically arranged in casting external mold and casting internal mold (2), the sprue (331) of the sprue (331) and casting internal mold (2) that are arranged in casting external mold connects, cross gate (332) is transversely arranged in casting external mold and casting internal mold (2), and is connected with sprue (331).
5. the casting die of quill shaft according to claim 3, it is characterized in that: described runner system comprises note running channel (32) and transmission running channel in siphon runner (31), rising head, it is laid in the bottom of outer model sand mold (12), its outlet is located at the bottom of the internal mold installation cavity (13) of outer model sand mold (12), and the other end of siphon runner (31) is connected with transmission running channel; In rising head, note running channel (32) is installed in casting internal mold (2), and in rising head, the outlet of note running channel (32) corresponds to rising head (421) place of rising head mould, and the other end of each interior note running channel is connected with transmission running channel; Transmission running channel comprises sprue (331) and cross gate (332), sprue (331) is vertically arranged in casting external mold and casting internal mold (2), the sprue (331) of the sprue (331) and casting internal mold (2) that are arranged in casting external mold connects, cross gate (332) is transversely arranged in casting external mold and casting internal mold (2), and is connected with sprue (331).
6. the casting die of quill shaft according to claim 1 and 2, is characterized in that: the flange face that described rising head sand mold (42) corresponds to the quill shaft that will cast is provided with blind riser (422) near the position at edge.
7. the casting die of quill shaft according to claim 5, is characterized in that: the flange face that described rising head sand mold (42) corresponds to the quill shaft that will cast is provided with blind riser (422) near the position at edge.
8. the casting die of quill shaft according to claim 7, is characterized in that: described siphon runner (31) is four, and the outlet of four siphon runners (31) is circumferentially uniform; In rising head, note running channel (32) is three, and three outlets of noting running channel in three are circumferentially distributed on casting internal mold (2) side, place; The wall of quill shaft casting cavity (133) and rising head is also coated with to be brushed with and covers layer of sand and alcohol zircon flour coating layer; Rising head mould also comprises rising head case (41), and rising head sand mold (42) is installed in rising head case (41); Blind riser (422) is eight to ten, and each blind riser (422) is circumferentially uniform.
9. a casting method for quill shaft, is characterized in that: it comprises following processing step: a kind of casting method of quill shaft, and it comprises following processing step:
One, modeling
Choose the casting die of the quill shaft described in claim 1 or 2;
Two, melting
Smelting metal casting liquid;
Three, pour into a mould
Through transmission running channel first to siphon runner (31) transferring metal casting liquid, after 3/2 to five/5ths height that metal casting liquid making is poured into rising head (421), in rising head, note running channel (32) transferring metal casting liquid through transmission running channel again, the liquid making of injection metal casting is full to rising head (421);
Four, bulk processing
Be incubated five to eight days, depanning, utilize the waste heat heat of foundry goods to cut rising head casting mold; Foundry goods is entered kiln and carry out normalizing and tempering process, the quill shaft of casting can be obtained.
10. the casting method of quill shaft according to claim 9, is characterized in that: described metal casting liquid making is molten steel; Step 2 smelting temperature is 1540 ~ 1560 DEG C; When temperature when quill shaft afterheat of casting heat cuts rising head is 350 ~ 450 DEG C.
CN201410501134.1A 2014-09-26 2014-09-26 Casting method of hollow shaft and casting mold Expired - Fee Related CN104226915B (en)

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CN201410501134.1A CN104226915B (en) 2014-09-26 2014-09-26 Casting method of hollow shaft and casting mold

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Application Number Priority Date Filing Date Title
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CN104226915B CN104226915B (en) 2017-01-25

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CN104889333A (en) * 2015-06-03 2015-09-09 天津市航宇金属加工有限公司 Mould with heatproof risers
CN105251943A (en) * 2015-10-30 2016-01-20 共享铸钢有限公司 Gating system of main frame casting of mining machine and modeling method of gating system
CN106583653A (en) * 2015-10-15 2017-04-26 通用汽车环球科技运作有限责任公司 Method to improve riser feedability for semi-permanent mold casting of cylinder heads
CN106862442A (en) * 2016-12-30 2017-06-20 宁波大学 A kind of casting without material head shaft forgings-roll manufacturing process
CN106583653B (en) * 2015-10-15 2019-07-16 通用汽车环球科技运作有限责任公司 The method for improving the feed performance of the riser of the semipermanent shape casting of cylinder cover

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CN101837432A (en) * 2010-05-20 2010-09-22 衡阳中钢衡重铸锻有限公司 Tyre casting method and casting die
CN102198490A (en) * 2011-03-30 2011-09-28 衡阳中钢衡重铸锻有限公司 Method for casting vertical lathe ram and casting die
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CN104889333A (en) * 2015-06-03 2015-09-09 天津市航宇金属加工有限公司 Mould with heatproof risers
CN106583653A (en) * 2015-10-15 2017-04-26 通用汽车环球科技运作有限责任公司 Method to improve riser feedability for semi-permanent mold casting of cylinder heads
CN106583653B (en) * 2015-10-15 2019-07-16 通用汽车环球科技运作有限责任公司 The method for improving the feed performance of the riser of the semipermanent shape casting of cylinder cover
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CN105251943B (en) * 2015-10-30 2018-05-22 共享铸钢有限公司 A kind of running gate system and its formative method of mining machinery mainframe casting
CN106862442A (en) * 2016-12-30 2017-06-20 宁波大学 A kind of casting without material head shaft forgings-roll manufacturing process

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