CN104942238B - Non-riser non-chill casting method for belt pulley - Google Patents
Non-riser non-chill casting method for belt pulley Download PDFInfo
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- CN104942238B CN104942238B CN201510371227.1A CN201510371227A CN104942238B CN 104942238 B CN104942238 B CN 104942238B CN 201510371227 A CN201510371227 A CN 201510371227A CN 104942238 B CN104942238 B CN 104942238B
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- belt pulley
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- ingate
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Abstract
The invention relates to a non-riser non-chill casting method for a belt pulley. The method comprises the following steps: S1, designing a casting system: according to the shape of the belt pulley, drawing a red blueprint and then manufacturing the casting system according to the red blueprint; S2, casting: adding a ferrosilicon inoculation agent accounting for 0.3-0.6% of molten metal flow in weight in a casting ladle, during casting, adding a stable inoculation agent accounting for 0.4-0.7% of the molten metal flow in weight along with the molten metal flow, cooling to room temperature after completion of casting, and taking out a belt pulley blank; and S3, machining. The method provided by the invention has the advantages as follows: the fact that melted iron enters a cavity to flow turbulently to cause unnecessary artificial hole shrinkage and hole looseness is avoided through the design of a runner. The process yield and production efficiency of the product are improved; a chill production process does not exist, the defect of artificial hole shrinkage caused by misuse of improper use of the chill is avoided; different inoculation agents are added at different periods and different inoculation modes area adopted, so that the advantages of multiple inoculation agents are effectively used.
Description
Technical field
The present invention relates to the production technical field of belt pulley, the no rising head no chill casting side of particularly a kind of belt pulley
Method.
Background technology
Belt pulley belongs to hub class part, and only the yield of China's belt pulley in 2013 is just more than 5.5 hundred million.As power train
The main kit of system, the development of belt pulley is the most important thing in the sector and whole commercial production.Traditional belt
In wheel Foundry Production, ingate is only using general rectangle or cylinder form design, and such design not only can not
Form thermal pressure and thermograde, be also easy to cause ingate radiate faster, iron liquid more first solidifies, thus blocking follow-up iron liquid
Flowing and supplement.Meanwhile, all using the running gate system with rising head, usually, rising head in conventional belt wheel Design of Runner System
Design depends on the shape of foundry goods with the experience of master worker it is intended that supplementing iron liquid, reduces hole defect.Such design side
Case not only increases the consumption of iron liquid, loaded down with trivial details subsequent machining operations, improves production cost；And easily introduce extraneous at rising head
Impurity and gas, form field trash and gas hole defect in cast-internal, have a strong impact on internal soundness and the product yield of foundry goods.
Chill is also inevitable choice in conventional belt wheel casting Technology Design, but chill is by tin plating or coating antiadhesion barrier
The mild steel of thin pulp or wire rod process, and the use inherently having limited chill from material can not be repeatedly and efficient, this
Obviously efficient production model now can not be met.Additionally, the use of chill needs the empirical cumulative of master worker, if using
Improper, not only can not refine primary crystallization, eliminate shrinkage cavity shrinkage porosity, but also thermograde confusion can be caused, solidification sequence is disorderly,
Cause more internal flaws.Meanwhile, using the complicated artificial operation of chill, reduce production efficiency, improve production cost, be unfavorable for
The raising of economic benefit.
Traditional the breeding of belt pulley be by based on low-carbon-equivalent it is ensured that premised on base iron has enough degree of supercoolings,
Problems with therefore inevitably occurs: 1, molten iron flow is poor, foundry goods is also easy to produce cold shut, pore, slag inclusion etc., percent defective
High.2nd, shrink greatly, make foundry goods easily form shrinkage cavity and porosity, crackle, deformation etc., percent defective is high.3rd, inoculation fade is fast, super cooling tendency
Greatly, sensitivity profile is high, not only can produce spoken parts in traditional operas at foundry goods thin-walled, bring difficulty to machining, and foundry goods can be made thick
Intensity decreases at wall are it is difficult to meet the requirement of mechanical performance.
Content of the invention
It is an object of the invention to the shortcoming overcoming prior art, there is provided a kind of no chill casting of the no rising head of belt pulley
Method, using the design of no riser gate, according to the optimization design of running gate system, can meet the thermograde of dies cavity with
Order during iron liquid solidification it is only necessary to ensure in casting process the abundance of the duration of pouring and iron liquid flow size it is possible to
Avoid the use of chill, in different times using the different modes that breeds, add different inovulants, to reach different breeding
Effect.
The purpose of the present invention is achieved through the following technical solutions: a kind of no rising head of belt pulley no chill casting method,
Including step:
S1, design running gate system: according to pulley shape, draw red blueprint, make running gate system further according to red blueprint, its
Cross gate design on the relatively thin one side of spoke wall, ingate using the embedded spoke being overlapped on foundry goods outside；
S2, cast: when metal liquor stream is in casting ladle, described metal liquor stream is iron liquid, add account for its weight 0.3～
0.6% ferrosilicon class inovulant, in cast, adds with metal liquor stream and accounts for its weight 0.4～0.7% stable type inovulant, pour
After the completion of note, it is cooled to room temperature, take out belt pulley blank；
S3, machining: according to the dimensional requirement of belt pulley product, belt pulley blank is carried out machining, finally add
Work goes out to meet the belt pulley with groove finished product of producer's requirement.
In described step s1, cross gate is in outer annular crescent shape, and its aspect ratio is between 1.5～2:1.
In described step s1, ingate has 2 or 4, and each ingate is in that the duckbill that front end is little, rear end is big is flat
Shape.
Described ferrosilicon class inovulant component content be si:60～65wt%, al:2～3wt%, ca:0.75～1.25wt%,
Mn:5～7wt%, ba:2～3wt%, balance of fe.
Described stable type inovulant component content be si:13～15wt%, al:1～2.5wt%, ca:0.8～1.2wt%,
Cr:38～42wt%, ti:0.1～0.3wt%, mn:8～11wt%, balance of fe.
The invention has the advantages that
1st, the cross gate of the present invention adopts outer annular design, and sprue is in the middle of cross gate, beneficial to the shunting of iron liquid, can
Eliminate the tendency of iron liquid turbulent flow；Such cross gate and sprue design can also disperse heat, it is to avoid heat concentrates the heat causing to answer
Power defect；Ingate adopts the big duckbill flat in the little rear end in front end, and such design artificially can form thermograde, be beneficial to
The sequence requirement of follow-up solidification, and also iron liquid flow can be controlled, it is to avoid there is turbulent flow phenomenon after entering die cavity in iron liquid, cause
Unnecessary artificial shrinkage cavity shrinkage porosity occurs.
2nd, the present invention does not use rising head, not only saves iron liquid consumption, reduces manually-injected pouring defect, improves product matter
Amount, improves the product yield of product, and also simplify pouring type, improve production efficiency.
3 present invention uses the production technology of no chill, it is to avoid the use of chill, not only without the concern for chill shape
Design and master worker's experience requirement, it is to avoid and the artificial shrinkage cavity defect that cause improper using chill, and can also be
Producer saves production cost, improves the quality of product.
4th, the present invention breed mode and conventional belt wheel breed that mode is different, the new mode that breeds of the present invention is emphasized
Add different inovulants in different times, breed mode using different, can effectively make cast iron without prejudice to graphitization in solidification,
And matrix can be promoted to form pearlite in solid state transformation, to obtain optimal pregnant effect.Additionally, using multiple compound inoculated
Agent, can effectively draw the strong point of multiple inovulants, avoid because single inovulant is using brought side effect.Composite inoculant
Have that graphite nucleation rate is high, pregnant effect good, anti-ageing move back that function is strong, consumption is few, low cost, the series of advantages such as easy to operate.
Specific embodiment
With reference to embodiment, the present invention will be further described, but protection scope of the present invention is not limited to following institute
State.
[embodiment 1]
A kind of no rising head of belt pulley no chill casting method, including step:
S1, design running gate system: according to pulley shape, draw red blueprint, make running gate system further according to red blueprint, its
On the relatively thin one side of spoke wall, cross gate is in outer annular crescent shape, and its aspect ratio is 1.5:1, ingate for cross gate design
Outside the embedded spoke being overlapped on foundry goods, ingate has 2, and each ingate is in the duckbill that front end is little, rear end is big
Flat；
S2, cast: when metal liquor stream is in casting ladle, adds and account for the ferrosilicon class inovulant of its weight 0.3%, described ferrosilicon
Class inovulant component content is si:60wt%, al:3wt%, ca:0.75wt%, mn:5wt%, ba:3wt%, balance of fe；Pouring
During note, add with metal liquor stream and account for its weight 0.7% stable type inovulant, described stable type inovulant component content is si:
13wt%, al:1wt%, ca:0.8wt%, cr:38wt%, ti:0.1wt%, mn:8wt%, balance of fe, after casting complete, are cooled to
Room temperature, takes out belt pulley blank；
S3, machining: according to the dimensional requirement of belt pulley product, belt pulley blank is carried out machining, finally add
Work goes out to meet the belt pulley with groove finished product of producer's requirement.
Actual performance and effect detection: foundry goods tensile strength 270mpa, belt pulley cast-internal no shrinkage cavity shrinkage porosity, foundry goods work
Skill yield rate 85%.
[embodiment 2]
A kind of no rising head of belt pulley no chill casting method, including step:
S1, design running gate system: according to pulley shape, draw red blueprint, make running gate system further according to red blueprint, its
On the relatively thin one side of spoke wall, cross gate is in outer annular crescent shape, and its aspect ratio is 1.8:1, ingate for cross gate design
Outside the embedded spoke being overlapped on foundry goods, ingate has 2, and each ingate is in the duckbill that front end is little, rear end is big
Flat；
S2, cast: when metal liquor stream is in casting ladle, adds and account for the ferrosilicon class inovulant of its weight 0.5%, described ferrosilicon
Class inovulant component content is si:62wt%, al:2.5wt%, ca:1.0wt%, mn:6wt%, ba:2.5wt%, balance of fe；?
During cast, add with metal liquor stream and account for its weight 0.4～0.7% stable type inovulant, described stable type inovulant composition contains
Measure as si:14wt%, al:1.6wt%, ca:1.0wt%, cr:40wt%, ti:0.2wt%, mn:10wt%, balance of fe, pour
Cheng Hou, is cooled to room temperature, takes out belt pulley blank；
S3, machining: according to the dimensional requirement of belt pulley product, belt pulley blank is carried out machining, finally add
Work goes out to meet the belt pulley with groove finished product of producer's requirement.
Actual performance and effect detection: foundry goods tensile strength 290mpa, belt pulley cast-internal no shrinkage cavity shrinkage porosity, foundry goods work
Skill yield rate 90%.
[embodiment 3]
A kind of no rising head of belt pulley no chill casting method, including step:
S1, design running gate system: according to pulley shape, draw red blueprint, make running gate system further according to red blueprint, its
On the relatively thin one side of spoke wall, cross gate is in outer annular crescent shape, and its aspect ratio is 2:1, and ingate is adopted for cross gate design
Outside the embedded spoke being overlapped on foundry goods, ingate has 4, and each ingate is in that the duckbill that front end is little, rear end is big is flat
Flat-shaped；
S2, cast: when metal liquor stream is in casting ladle, adds and account for the ferrosilicon class inovulant of its weight 0.6%, described ferrosilicon
Class inovulant component content is si:65wt%, al:2wt%, ca:1.25wt%, mn:7wt%, ba:3wt%, balance of fe；Pouring
During note, add with metal liquor stream and account for its weight 0.4% stable type inovulant, described stable type inovulant component content is si:
15wt%, al:2.5wt%, ca:1.2wt%, cr:42wt%, ti:0.3wt%, mn:11wt%, balance of fe are after casting complete, cold
But to room temperature, take out belt pulley blank；
S3, machining: according to the dimensional requirement of belt pulley product, belt pulley blank is carried out machining, finally add
Work goes out to meet the belt pulley with groove finished product of producer's requirement.
Actual performance and effect detection: foundry goods tensile strength 300mpa, no shrinkage cavity shrinkage porosity inside belt pulley, casting process goes out
Product rate 85%.
Claims (3)
1. a kind of no rising head of belt pulley no chill casting method it is characterised in that: include step:
S1, design running gate system: according to pulley shape, draw red blueprint, make running gate system further according to red blueprint, it is horizontal to pour
Road design on the relatively thin one side of spoke wall, ingate using the embedded spoke being overlapped on foundry goods outside；
S2, cast: when metal liquor stream is in casting ladle, add the ferrosilicon class inovulant accounting for its weight 0.3～0.6%, in cast,
Add with metal liquor stream and account for its weight 0.4～0.7% stable type inovulant, after casting complete, be cooled to room temperature, take out belt pulley
Blank, described ferrosilicon class inovulant component content is si:60～65wt%, al:2～3wt%, ca:0.75～1.25wt%, mn:
5～7wt%, ba:2～3wt%, balance of fe, described stable type inovulant component content be si:13～15wt%, al:1～
2.5wt%, ca:0.8～1.2wt%, cr:38～42wt%, ti:0.1～0.3wt%, mn:8～11wt%, balance of fe；
S3, machining: according to the dimensional requirement of belt pulley product, belt pulley blank is carried out machining, finally processes
Meet the belt pulley with groove finished product of producer's requirement.
2. a kind of no rising head of belt pulley according to claim 1 no chill casting method it is characterised in that: described step
In rapid s1, cross gate is in outer annular crescent shape, and its aspect ratio is between 1.5～2:1.
3. a kind of no rising head of belt pulley according to claim 1 no chill casting method it is characterised in that: described step
In rapid s1, ingate has 2 or 4, and each ingate is in the duckbill flat that front end is little, rear end is big.
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| CN201510371227.1A CN104942238B (en) | 2015-06-30 | 2015-06-30 | Non-riser non-chill casting method for belt pulley |
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| CN201510371227.1A CN104942238B (en) | 2015-06-30 | 2015-06-30 | Non-riser non-chill casting method for belt pulley |
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| CN104942238B true CN104942238B (en) | 2017-02-01 |
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| CN107267853A (en) * | 2017-05-25 | 2017-10-20 | 芜湖诚拓汽车零部件有限公司 | Engine belt pulley wheel hub production technology |
| CN113477886A (en) * | 2021-07-12 | 2021-10-08 | 杭州新宇机械制造有限公司 | Casting system and casting process for steam turbine cylinder body casting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927329A (en) * | 2010-09-06 | 2010-12-29 | 重庆硕龙科技有限公司 | Vacuum high-pressure casting method |
| CN102672117A (en) * | 2012-04-27 | 2012-09-19 | 阳城县绿色铸造研发中心 | Process method for duplex production of HT200 and HT250 castings by blast furnace and intermediate-frequency furnace |
| KR20130052296A (en) * | 2011-11-11 | 2013-05-22 | 깁스코리아다이캐스팅 유한회사 | Pulley mold for die casting and pulley manufacturing method which uses this |
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2015
- 2015-06-30 CN CN201510371227.1A patent/CN104942238B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927329A (en) * | 2010-09-06 | 2010-12-29 | 重庆硕龙科技有限公司 | Vacuum high-pressure casting method |
| KR20130052296A (en) * | 2011-11-11 | 2013-05-22 | 깁스코리아다이캐스팅 유한회사 | Pulley mold for die casting and pulley manufacturing method which uses this |
| CN102672117A (en) * | 2012-04-27 | 2012-09-19 | 阳城县绿色铸造研发中心 | Process method for duplex production of HT200 and HT250 castings by blast furnace and intermediate-frequency furnace |
Non-Patent Citations (1)
| Title |
|---|
| 轮盘类铸铁件铸造工艺;纪云玲;《铸造》;20131231(第1期);80-82 * |
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