CN109822055A - Utilize the Bracking-resistant method of permanent mold casting arbor - Google Patents
Utilize the Bracking-resistant method of permanent mold casting arbor Download PDFInfo
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- CN109822055A CN109822055A CN201910216352.3A CN201910216352A CN109822055A CN 109822055 A CN109822055 A CN 109822055A CN 201910216352 A CN201910216352 A CN 201910216352A CN 109822055 A CN109822055 A CN 109822055A
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- Prior art keywords
- arbor
- bracking
- flank
- section
- resistant method
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Abstract
A kind of Bracking-resistant method using permanent mold casting arbor, belong to casting technology field, arbor has crackle, deformation to be even broken when for solving the problems, such as that permanent mold casting has the elongated arbor of flank, the Bracking-resistant method includes: 1) to make metal mold, according to the structure fabrication metal mold of arbor, the metal mold is equipped with straight section type chamber and auxiliary section；2) structure fabrication according to the flank of auxiliary section and arbor, deformation section and bending segment is used to form the sand mold of the flank, deformation section and bending segment, and the sand mold is equipped with the inner cavity that can form the arbor flank, deformation section and bending segment；3) it is connected to the inner cavity of the sand mold with straight section type chamber.The Bracking-resistant method provides certain deformability by the collapsibility of sand mold, solves the problems such as above-mentioned crackle, namely absorb molten metal solidification to the tensile stress of the non-straight section such as flank by the collapsibility of sand mold.
Description
Technical field
The present invention relates to casting technology fields, the in particular to Bracking-resistant method in arbor manufacturing process.
Background technique
Elongate water pipe, oil pipe sand core on big-block engine frame castings are needed using profile-followed, band tooth cast iron arbor.For
The production cast iron arbor, it is necessary first to make the production mould of the arbor, the arbor of the cast iron quality can pass through
Sand casting is poured, and can also be directly poured by metal type dies；When using sand casting, due to needing using casting
Auxiliary material molding sand and binder are made, will cause the increase of production cost；Now frequently with method be using metal mold through brushing it is resistance to
Directly the arbor is made in casting after fiery coating.But it when metal mold makes the arbor, since metal mold does not have deformability, pours
Iron liquid solidification shrinkage will lead to the arbor production crackle after note, deformation is even broken and is not available.
Summary of the invention
The crackle that generates when in view of the above elongated arbor for being had flank using permanent mold casting, deformation, fracture are asked
Topic, it is necessary to propose that a kind of Bracking-resistant method using permanent mold casting arbor, the Bracking-resistant method are by using in metal mold
To form the structure that the structure division setting of elongated arbor flank has certain deformability, to avoid thin due to metal mold part
To drawing force caused by flank when long and straight section is shunk, the defects of, deformation cracked so as to avoid shoulder portion.
A kind of Bracking-resistant method using permanent mold casting arbor, the arbor are equipped with flank, and the flank is for reinforcing
The flank of the corresponding construction of the protruding parts of elongated sand core namely the arbor bifurcated equipped with straight section and from straight section, including such as
Lower content:
1) metal mold is made, according to the structure fabrication metal mold of arbor, the metal mold is equipped with straight section type chamber and cooperation
Portion；
2) structure fabrication according to the flank of auxiliary section and arbor, deformation section and bending segment is used to form the flank, change
The sand core of shape section and bending segment, the sand core are equipped with the inner cavity that can form the arbor flank, deformation section and bending segment；
3) it is connected to the inner cavity of the sand core with straight section type chamber；
4) sand core is assemblied in the metal mold equipped with auxiliary section, and applies fire resisting together with the metal mold
Coating；
5) on straight section every using casting in open to be poured the arbor on 800mm~1000mm.
As further supplement of the invention, be additionally provided with flow inlet on the sand core top of the flank, when the flank compared with
When elongated, in order to avoid straight section iron liquid can not caused flank casting be incomplete in the smooth sand core into the flank asks
Topic also increases flow inlet at the top of flank sand mould and carries out Multi-point pouring, guarantees flank casting in place.
As further supplement of the invention, be used to form on the sand core inner cavity of flank apart from the auxiliary section away from
From for 30mm~50mm, or it can be said that the mold thickness to auxiliary section for being used to form the inner cavity of the flank be 30mm~
50mm.The fireproof coating can be alcohol radical or water based paint.
The entire infrastructure of the arbor with flank is arranged in metal mold the utility model has the advantages that passing through for technical solution of the present invention
Forging type be improved to bifurcated flank by the mutually matched mode of metal mold of sand core and straight section, solve solidifying in molten metal
Gu the problem that crotch tension stress is cracked, deformed, being broken etc. in cooling procedure.
Detailed description of the invention
Fig. 1 is the arbor schematic diagram with flank；
Fig. 2 is provided with the metal mold schematic diagram of auxiliary section；
Fig. 3 is arbor flank sand core schematic diagram；
Fig. 4 is metal mold and auxiliary section assembled state schematic diagram；
In figure, 1- metal mold；2- arbor；201- arbor one；202- arbor two；203- arbor three；204- arbor four；3- is straight
Section；4- flank；5- deformation section；6- bending segment；The auxiliary section 7-；8- sand core；9- flow inlet；10- straight section type chamber.
Specific embodiment
In order to illustrate more clearly of technical solution of the present invention, will be described in detail according to figure embodiment, it is aobvious and easy
Insight, drawings in the following description are some embodiments of the invention, for those of ordinary skill in the art, is not paying
Under the premise of creative work, other structure types or combination can also be obtained according to these attached drawings.
It is as shown in Figure 1 four kinds of different 2 structural schematic diagrams of arbor with flank, wherein arbor 201 is equipped with straight section
3, the arbor of deformation section 5 and bending segment 6, specifically, the deformation section 5 is tooth form ring structure, embedded in straight for arbor 201
In section 3；The arbor 202 is the arbor for being located at the flank 4 at 3 middle part of straight section equipped with straight section 3, two, for arbor 202, institute
Stating flank 4 is the straight bar section for being placed in 3 side of straight section or two sides；The arbor 203 is the core equipped with straight section 3 and two flanks 4
Bone, as soon as one of them described flank 4 is placed in the end point of the arbor 203, for arbor 203, the flank 4 be placed in it is straight
The straight bar section of 3 sides of section or two sides；The arbor 204 be equipped with straight section 3, deformation section 5, bending segment 6 and flank 4 arbor,
For arbor 204, the deformation section 5 is the straight section of diameter and section a segment length different from straight section 3.In order to save metal
The manufacturing cost of type 1 postpones four arbors 2 according to reasonable sequence cloth, is arranged in the same metal mold 1, is used for
The minimum spacing between the type chamber of four arbors 2 is formed not less than 30mm.
It is illustrated in figure 2 the metal mold 1 equipped with the arbor 201,204 type chamber of arbor 202, arbor 203 and arbor.It is described
Metal mold 1 includes straight section type chamber 10 and auxiliary section 7, and the straight section type chamber 10 is used to form straight section 3, the auxiliary section 7 be used for
The sand core 8 for forming the flank 4, deformation section 5 and bending segment 6 cooperates.The metal mold 1 is set as casting in open mode namely described
Straight section type chamber 10 leaks outside in atmosphere, and directly toppling over molten metal both above the straight section type chamber 10 can complete to straight section 3
Casting；And the inner cavity for the flank 4 that bifurcated is gone out is connected to straight section type chamber 10, molten metal can flank 4 inner cavity and straight section type
It is flowed between chamber 10, to complete the casting of the arbor 2.
It is illustrated in figure 3 the sand core 8 for being used to form flank 4, deformation section 5 and bending segment 6.The sand core 8 is equipped with and is used for
The inner cavity of flank 4, deformation section 5 and bending segment 6 is formed, the inner cavity is connected to straight section type chamber 10；The sand core 8 and auxiliary section 7
It cooperates, so that the type chamber of complete arbor 2 is formed, the state after being illustrated in figure 4 the two cooperation.The sand core 8 is filled
After being fitted on the auxiliary section 7 of the metal mold 1, application fireproof coating is carried out to the metal mold 1 equipped with sand core 8, fireproof coating
Apply the cooperation gap for needing to be fully sealed the sand core 8 and auxiliary section.The fireproof coating can be with water based paint, or
Alcohol-base paint.The mold thickness of the sand core 8 be 30mm~50mm, with guarantee the sand core 8 described in casting process will not be defeated and dispersed and lead
The corresponding construction of cause arbor 2 can not form or deform overproof.
As further improvement of this embodiment, the molding in order to guarantee the flank 4, deformation section 5 and bending segment 6 is complete
It is whole, flow inlet 9 can also be opened up on the top of the sand core 8, while being poured straight section type chamber 10, on Xiang Suoshu sand core 8
Flow inlet 9 also topples over molten metal, so as to avoid being that molten metal can not fill caused by metal mold cooling is too fast because of straight section type chamber 10
The structure of flank 4, deformation section 5 and bending segment 6 caused by sand filling core 8 is imperfect.
As the present embodiment another kind improve, the straight section type chamber 10 can also using multiple spot simultaneously casting by the way of,
Such as can be every in the distance of 800mm~1000mm, pour point is toppled in setting one, to avoid straight section type chamber 10 due to cooling
Section caused by uneven is imperfect.
The shrink space that the present invention has given metal mold 1 certain by using sand core 8 avoids molten metal in solidification shrinkage mistake
Crackle, deformation, fracture etc. are asked at the flank 4 as caused by the deformability difference of metal mold, deformation section 5 and bending segment 6 in journey
Topic.The collapsibility of sand core 8 is borrowed mainly to provide the deformability for making up metal mold.For the present embodiment, sand core 8 has
The mold thickness of 30mm~50mm, then after casting solidification, after sand core is defeated and dispersed by high temperature, also at least the yielding of 20mm away from
From so as to avoid solidification cooling meat to the rigid pulling force at 6 position of the flank 4, deformation section 5 and bending segment.Such as profile of tooth ring
Tensile stress at the deformation section 5 of structure can be completely eliminated by sand core 8, to ensure that 2 size and shape of arbor just
True property.The arbor elongated, with flank that shape and size qualification can be obtained is the premise for obtaining qualified elongated sand core,
And qualified elongated sand core is due to the production premise of castings, therefore the yield rate of casting is also indirectly improved through the invention
With reduce technique production cost.
Above embodiments are only the descriptions to a kind of typical case of technical solution of the present invention, it is reasonable, do not need to pay
Out on the basis of creative work, can also reasonably it be expanded.
Claims (7)
1. a kind of Bracking-resistant method using permanent mold casting arbor, which is characterized in that the Bracking-resistant method includes,
According to the structure fabrication metal mold of arbor, the metal mold is equipped with straight section type chamber and auxiliary section；
Structure fabrication according to the flank of auxiliary section and arbor, deformation section and bending segment be used to form the flank, deformation section and
The sand core of bending segment；
It is connected to the inner cavity of the sand core with straight section type chamber；
The sand core is assemblied at the auxiliary section, and the metal mold for being equipped with the sand core applies fireproof coating.
2. utilizing the Bracking-resistant method of permanent mold casting arbor as described in claim 1, which is characterized in that the Bracking-resistant method is also
Including toppling over molten metal in the distance above the straight section type chamber every 800mm~1000mm and being poured.
3. utilizing the Bracking-resistant method of permanent mold casting arbor as described in claim 1, which is characterized in that above the sand core also
Equipped with flow inlet, it to be used for casting of molten metal.
4. utilizing the Bracking-resistant method of permanent mold casting arbor as claimed in claim 3, which is characterized in that the sand core is equipped with
The mold thickness of 30mm~50mm.
5. the Bracking-resistant method using permanent mold casting arbor as described in claim 1-4 any one, which is characterized in that described
Metal mold is equipped with the type chamber of several independent arbors.
6. utilizing the Bracking-resistant method of permanent mold casting arbor as claimed in claim 5, which is characterized in that the metal mold setting
Casting in open mode.
7. utilizing the Bracking-resistant method of permanent mold casting arbor as claimed in claim 6, which is characterized in that described each independent
Minimum range between the type chamber of arbor is 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216352.3A CN109822055A (en) | 2019-03-21 | 2019-03-21 | Utilize the Bracking-resistant method of permanent mold casting arbor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216352.3A CN109822055A (en) | 2019-03-21 | 2019-03-21 | Utilize the Bracking-resistant method of permanent mold casting arbor |
Publications (1)
| Publication Number | Publication Date |
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| CN109822055A true CN109822055A (en) | 2019-05-31 |
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| CN201910216352.3A Pending CN109822055A (en) | 2019-03-21 | 2019-03-21 | Utilize the Bracking-resistant method of permanent mold casting arbor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2477298Y (en) * | 2001-04-03 | 2002-02-20 | 山东省冶金科学研究院 | Main body extruded composite shape of copper blow head |
| CN201030419Y (en) * | 2006-12-06 | 2008-03-05 | 贵州安大航空锻造有限责任公司 | Dead head of long-rail steel casting |
| CN202062044U (en) * | 2011-04-29 | 2011-12-07 | 常州精棱铸锻有限公司 | Pouring mechanism for long and thin castings |
| CN103056325A (en) * | 2012-12-03 | 2013-04-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Method for casting air sucking valve steel casting part |
| CN106424577A (en) * | 2016-08-16 | 2017-02-22 | 浙江省机电设计研究院有限公司 | Sand core device and method for preventing hot cracks during steel casting iron mold sand covering casting production |
| CN106925722A (en) * | 2017-03-10 | 2017-07-07 | 长沙合丰耐磨材料有限公司 | Production overlength, the running gate system of ultra-thin aluminum alloy casting |
-
2019
- 2019-03-21 CN CN201910216352.3A patent/CN109822055A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2477298Y (en) * | 2001-04-03 | 2002-02-20 | 山东省冶金科学研究院 | Main body extruded composite shape of copper blow head |
| CN201030419Y (en) * | 2006-12-06 | 2008-03-05 | 贵州安大航空锻造有限责任公司 | Dead head of long-rail steel casting |
| CN202062044U (en) * | 2011-04-29 | 2011-12-07 | 常州精棱铸锻有限公司 | Pouring mechanism for long and thin castings |
| CN103056325A (en) * | 2012-12-03 | 2013-04-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Method for casting air sucking valve steel casting part |
| CN106424577A (en) * | 2016-08-16 | 2017-02-22 | 浙江省机电设计研究院有限公司 | Sand core device and method for preventing hot cracks during steel casting iron mold sand covering casting production |
| CN106925722A (en) * | 2017-03-10 | 2017-07-07 | 长沙合丰耐磨材料有限公司 | Production overlength, the running gate system of ultra-thin aluminum alloy casting |
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Application publication date: 20190531 |
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