CN107297456A - The casting method of automobile brake drum - Google Patents
The casting method of automobile brake drum Download PDFInfo
- Publication number
- CN107297456A CN107297456A CN201710478599.3A CN201710478599A CN107297456A CN 107297456 A CN107297456 A CN 107297456A CN 201710478599 A CN201710478599 A CN 201710478599A CN 107297456 A CN107297456 A CN 107297456A
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- Prior art keywords
- casting
- ladle
- mould
- molten steel
- brake drum
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses the casting method of automobile brake drum, it comprises the following steps：1) moulding and mould assembling；2) melting：A) start power supply after steel ingot is fitted into stove, initial power supply is about the 60% of rated power, is gradually increased power with the heating and fusing of furnace charge, steel ingot starts after fusing, start argon gas protection；B) load melting 60 80%, sample examination, plus deslagging agent covering molten steel；3) pour into a mould：A) ladle baking is to more than 800 DEG C and cleans out, ladle argon-blown operation is carried out for bottom pour ladle cast, argon blowing time is no less than 3 minutes, for cast of two-maing ladle, calm many 2 minutes of the time is often wrapped, 1 kilogram of calcium-silicon and 1 kilogram of silicozirconium are added by molten steel per ton in ladle during tapping；4) mechanical sand removal：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 4 6kg；5) it is heat-treated；6) finishing.The casting technique cavity filling process of the present invention is stable, can be prevented effectively from casting and the phenomenons such as sand washing and stomata occurs.
Description
Technical field
The present invention relates to the casting method of casting technology field, more particularly to automobile brake drum.
Background technology
At present, auto industry has become mainstay of the national economy industry, auto industry to develop into auto parts and components special
It is not that the development of foundry enterprise provides huge development space, brake drum is main building block in brake system of car,
Play a part of brake, vital effect is played in running car, because brake drum bears larger frictional force, so
The requirement of the mechanical properties such as intensity, hardness to brake drum and thermal conductivity, wearability and anti-fatigue performance is higher.
Traditional braking drum casting process can not meet new technical requirements, the metallographic structure of brake drum, and graphite form can not
Requirement is reached, causes that the low intensity of brake drum, anti-wear performance are poor, service life is short, processing characteristics is also poor, hardness is higher, makes
Easily occur crackle too early in, abnormal sound and shake are especially also easy to produce in brake process, causes the service life of product short；This
Outside, the shortcomings of also there is high defect rate and poor Forming Quality in existing casting technique.
The content of the invention
It is an object of the invention to provide the casting method of automobile brake drum, it can be prevented effectively from automobile brake drum casting and go out
The existing phenomenon such as sand washing and stomata, greatly improves Forming Quality.
To achieve the above object, the present invention provides following technical scheme：
The casting method of automobile brake drum, it comprises the following steps：
1) moulding and mould assembling：Carried out before moulding, mould assembly, pricked on upper sand mold top using unselected clay sand mold jolt-squeeze type instrument
If steam vent, during mould assembly, guide and alignment pin are accurately controlled, it is ensured that be not in contact during mould assembly with close-over；
2) melting：
A) power supply is started after steel ingot is fitted into stove, initial power supply is about the 60% of rated power, with the heating of furnace charge
Power is gradually increased with fusing, steel ingot starts after fusing, starts argon gas protection；
B) load melting 60-80%, sample examination, plus deslagging agent covering molten steel, after alloy and furnace charge are melting down, samplingization
Test, while molten steel is incubated, temperature is less than 1580 DEG C, and slagging-off is clean and adds new deslagging agent covering；
C) add new deslagging agent covering heating after slagging-off completely, be warming up to 1600~1660 DEG C of tapping temperature, molten steel per ton adds
Enter 0.5 kilogram of aluminium, ladle is hung to stokehold, tapped completely after slagging-off；
3) pour into a mould：
A) ladle baking is to more than 800 DEG C and cleans out, and ladle argon-blown operation is carried out for bottom pour ladle cast, during Argon
Between be no less than 3 minutes, for cast of two-maing ladle, calm many 2 minutes of the time is often wrapped, by molten steel per ton addition in ladle during tapping
1 kilogram of calcium-silicon and 1 kilogram of silicozirconium, cast mid-term take finished product sample, pour into a mould coupon；
B) using the upward arrangement form in the rim of a bowl direction, sprue, ingate and sprue cup are all disposed within the inside of bowl；
When c) pouring into a mould, diffusing, cutout are prevented, and notes filling, is poured according to the thickness suitable control of the size of casting and wall
Temperature is noted, beam is gradually reduced after being poured at rising head 2/3, and adds enough covertures, thread feeding, molten steel are used in emphasis
Rising head can not be overflowed, appropriate carry out teeming is wanted for big part；
4) mechanical sand removal：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 4-6kg；
5) it is heat-treated：Fire box temperature should be less than 500 DEG C during shove charge, casting should upright, edge-on or prostration put, to prevent
Deformed under high temperature, batch must not exceed the useful space of heating furnace, casting is come out of the stove to the transfer time for entering water and is no more than 90 seconds,
Open all stirring facilities, it is ensured that the final water temperature of quenching should be no more than 50 DEG C；
6) finishing：Defect first is removed with gas cutting processing mode, to reduce polishing amount, root is necessary more than all casting head of casting
Polishing is removed, and the residual altitude of machined surface is less than 2mm, obtains automobile brake drum finished product.
It is preferred that, step 6) in defect can also be removed using plasma or carbon arc air gouging processing mode.
It is preferred that, step 4) in shake shell machine air pressure be 5.2kg.
Compared with prior art, the beneficial effects of the invention are as follows：
The casting technique of automobile brake drum in the present invention can effectively improve product quality and yield rate, through the founder
Automobile brake drum prepared by skill has that heat endurance is good, wearability strong, and the metallographic of brake drum matrix is form compact and stable, hard
Degree increase, tensile strength are improved, and increase vehicle safety.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
Embodiment one
The casting method of automobile brake drum, it comprises the following steps：
1) moulding and mould assembling：Carried out before moulding, mould assembly, pricked on upper sand mold top using unselected clay sand mold jolt-squeeze type instrument
If steam vent, during mould assembly, guide and alignment pin are accurately controlled, it is ensured that be not in contact during mould assembly with close-over；
2) melting：A) power supply is started after steel ingot is fitted into stove, initial power supply is about the 60% of rated power, with furnace charge
Heating and fusing be gradually increased power, steel ingot starts after fusing, start argon gas protection；B) load melting 60-80%, samplingization
Test, plus deslagging agent covering molten steel, after alloy and furnace charge are melting down, sample examination, while molten steel is incubated, temperature is less than 1580
DEG C, slagging-off is clean and adds new deslagging agent covering；C) add new deslagging agent covering heating after slagging-off completely, be warming up to tapping temperature
1600~1660 DEG C, molten steel per ton adds 0.5 kilogram of aluminium, and ladle is hung to stokehold, is tapped completely after slagging-off；
3) pour into a mould：A) ladle baking is to more than 800 DEG C and cleans out, and ladle argon-blown behaviour is carried out for bottom pour ladle cast
Make, argon blowing time is no less than 3 minutes, for cast of two-maing ladle, calm many 2 minutes of the time is often wrapped, by every in ladle during tapping
Ton molten steel adds 1 kilogram of calcium-silicon and 1 kilogram of silicozirconium, and cast mid-term takes finished product sample, pours into a mould coupon；B) the rim of a bowl side is used
To upward arrangement form, sprue, ingate and sprue cup are all disposed within the inside of bowl；When c) pouring into a mould, prevent diffusing, break
Stream, and note filling, according to the size of casting and the thickness suitable control pouring temperature of wall, after being poured at rising head 2/3 by
Decrescence small beam, and enough covertures are added, thread feeding is used in emphasis, and molten steel can not overflow rising head, appropriate for big part
Carry out teeming；
4) mechanical sand removal：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 4-6kg；
5) it is heat-treated：Fire box temperature should be less than 500 DEG C during shove charge, casting should upright, edge-on or prostration put, to prevent
Deformed under high temperature, batch must not exceed the useful space of heating furnace, casting is come out of the stove to the transfer time for entering water and is no more than 90 seconds,
Open all stirring facilities, it is ensured that the final water temperature of quenching should be no more than 50 DEG C；
6) finishing：Defect first is removed with gas cutting processing mode, to reduce polishing amount, root is necessary more than all casting head of casting
Polishing is removed, and the residual altitude of machined surface is less than 2mm, obtains automobile brake drum finished product.
Embodiment two
The casting method of automobile brake drum, it comprises the following steps：
1) moulding and mould assembling：Carried out before moulding, mould assembly, pricked on upper sand mold top using unselected clay sand mold jolt-squeeze type instrument
If steam vent, during mould assembly, guide and alignment pin are accurately controlled, it is ensured that be not in contact during mould assembly with close-over；
2) melting：A) power supply is started after steel ingot is fitted into stove, initial power supply is about the 60% of rated power, with furnace charge
Heating and fusing be gradually increased power, steel ingot starts after fusing, start argon gas protection；B) load melting 70%, sample examination,
Plus deslagging agent covering molten steel, after alloy and furnace charge are melting down, sample examination, while molten steel is incubated, temperature is less than 1580 DEG C,
Slagging-off is clean and adds new deslagging agent covering；C) add new deslagging agent covering heating after slagging-off completely, be warming up to tapping temperature 1600
~1660 DEG C, molten steel per ton adds 0.5 kilogram of aluminium, and ladle is hung to stokehold, is tapped completely after slagging-off；
3) pour into a mould：A) ladle baking is to more than 800 DEG C and cleans out, and ladle argon-blown behaviour is carried out for bottom pour ladle cast
Make, argon blowing time is no less than 3 minutes, for cast of two-maing ladle, calm many 2 minutes of the time is often wrapped, by every in ladle during tapping
Ton molten steel adds 1 kilogram of calcium-silicon and 1 kilogram of silicozirconium, and cast mid-term takes finished product sample, pours into a mould coupon；B) the rim of a bowl side is used
To upward arrangement form, sprue, ingate and sprue cup are all disposed within the inside of bowl；When c) pouring into a mould, prevent diffusing, break
Stream, and note filling, according to the size of casting and the thickness suitable control pouring temperature of wall, after being poured at rising head 2/3 by
Decrescence small beam, and enough covertures are added, thread feeding is used in emphasis, and molten steel can not overflow rising head, appropriate for big part
Carry out teeming；
4) mechanical sand removal：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 5.2kg；
5) it is heat-treated：Fire box temperature should be less than 500 DEG C during shove charge, casting should upright, edge-on or prostration put, to prevent
Deformed under high temperature, batch must not exceed the useful space of heating furnace, casting is come out of the stove to the transfer time for entering water and is no more than 90 seconds,
Open all stirring facilities, it is ensured that the final water temperature of quenching should be no more than 50 DEG C；
6) finishing：Defect first is removed with plasma or carbon arc air gouging processing mode, to reduce polishing amount, all casting are poured
Root must polish removal more than rising head, and the residual altitude of machined surface is less than 2mm, obtains automobile brake drum finished product.
Above content is only to structure example of the present invention and explanation, affiliated those skilled in the art couple
Described specific embodiment is made various modifications or supplement or substituted using similar mode, without departing from invention
Structure surmounts scope defined in the claims, all should belong to protection scope of the present invention.
Claims (3)
1. the casting method of automobile brake drum, it is characterised in that comprise the following steps：
1) moulding and mould assembling：Carried out using unselected clay sand mold jolt-squeeze type instrument before moulding, mould assembly, the row of setting is pricked on upper sand mold top
Stomata, during mould assembly, is accurately controlled guide and alignment pin, it is ensured that be not in contact during mould assembly with close-over；
2) melting：
A) power supply is started after steel ingot is fitted into stove, initial power supply is about the 60% of rated power, with the heating of furnace charge and molten
Change is gradually increased power, and steel ingot starts after fusing, starts argon gas protection；
B) load melting 60-80%, sample examination, plus deslagging agent covering molten steel, after alloy and furnace charge are melting down, sample examination,
Molten steel is incubated simultaneously, and temperature is less than 1580 DEG C, and slagging-off is clean and adds new deslagging agent covering；
C) add new deslagging agent covering heating after slagging-off completely, be warming up to 1600~1660 DEG C of tapping temperature, molten steel per ton adds 0.5
Kilogram aluminium, ladle is hung to stokehold, is tapped completely after slagging-off；
3) pour into a mould：A) ladle baking is to more than 800 DEG C and cleans out, and to carry out ladle argon-blown operation for bottom pour ladle cast, blow
The argon time is no less than 3 minutes, for cast of two-maing ladle, often wraps calm many 2 minutes of the time, presses molten steel per ton during tapping in ladle
1 kilogram of calcium-silicon and 1 kilogram of silicozirconium are added, cast mid-term takes finished product sample, pours into a mould coupon；
B) using the upward arrangement form in the rim of a bowl direction, sprue, ingate and sprue cup are all disposed within the inside of bowl；
When c) pouring into a mould, diffusing, cutout are prevented, and notes filling, temperature is poured into a mould according to the size of casting and the thickness suitable control of wall
Degree, is gradually reduced beam after being poured at rising head 2/3, and adds enough covertures, and thread feeding is used in emphasis, and molten steel can not
Rising head is overflowed, appropriate carry out teeming is wanted for big part；
4) mechanical sand removal：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 4-6kg；
5) it is heat-treated：Fire box temperature should be less than 500 DEG C during shove charge, casting should upright, edge-on or prostration put, to prevent in high temperature
Lower deformation, batch must not exceed the useful space of heating furnace, and casting is come out of the stove to the transfer time for entering water and is no more than 90 seconds, opens
All stirring facilities, it is ensured that the final water temperature of quenching should be no more than 50 DEG C；
6) finishing：Defect first is removed with gas cutting processing mode, to reduce polishing amount, root must polish more than all casting head of casting
Remove, the residual altitude of machined surface is less than 2mm, obtains automobile brake drum finished product.
2. the casting method of automobile brake drum according to claim 1, it is characterised in that：Step 6) in can also using etc.
Ion or carbon arc air gouging processing mode remove defect.
3. the casting method of automobile brake drum according to claim 2, it is characterised in that：Step 4) middle shake shell machine air pressure
Power is 5.2kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478599.3A CN107297456A (en) | 2017-06-22 | 2017-06-22 | The casting method of automobile brake drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478599.3A CN107297456A (en) | 2017-06-22 | 2017-06-22 | The casting method of automobile brake drum |
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| CN107297456A true CN107297456A (en) | 2017-10-27 |
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| CN201710478599.3A Pending CN107297456A (en) | 2017-06-22 | 2017-06-22 | The casting method of automobile brake drum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317611A (en) * | 2018-11-15 | 2019-02-12 | 安徽应流集团霍山铸造有限公司 | A kind of sand mould casting method of nickel base superalloy casting |
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|---|---|---|---|---|
| CN102071352A (en) * | 2011-01-17 | 2011-05-25 | 重庆大学 | Vanadium-titanium vermicular cast iron brake drum and preparation method thereof |
| KR20130047135A (en) * | 2011-10-31 | 2013-05-08 | 주식회사 포스코 | Method for refining hot metal and method of manufacturing free-cutting steel using the same |
| CN103266268A (en) * | 2013-05-15 | 2013-08-28 | 贵州安顺巨驰汽车配件有限责任公司 | Casting method of vehicle brake drum |
| CN103952621A (en) * | 2014-05-26 | 2014-07-30 | 四川省富邦钒钛制动鼓有限公司 | Vanadium-titanium gray cast iron and production technique thereof |
| CN103993221A (en) * | 2014-05-26 | 2014-08-20 | 四川省富邦钒钛制动鼓有限公司 | Vanadium titanium cast iron brake drum and preparation method thereof |
| CN106001452A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Brake drum casting process |
| CN106756278A (en) * | 2016-12-27 | 2017-05-31 | 温州瑞尔金属制造有限公司 | A kind of preparation technology of ball valve body |
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2017
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| CN102071352A (en) * | 2011-01-17 | 2011-05-25 | 重庆大学 | Vanadium-titanium vermicular cast iron brake drum and preparation method thereof |
| KR20130047135A (en) * | 2011-10-31 | 2013-05-08 | 주식회사 포스코 | Method for refining hot metal and method of manufacturing free-cutting steel using the same |
| CN103266268A (en) * | 2013-05-15 | 2013-08-28 | 贵州安顺巨驰汽车配件有限责任公司 | Casting method of vehicle brake drum |
| CN103952621A (en) * | 2014-05-26 | 2014-07-30 | 四川省富邦钒钛制动鼓有限公司 | Vanadium-titanium gray cast iron and production technique thereof |
| CN103993221A (en) * | 2014-05-26 | 2014-08-20 | 四川省富邦钒钛制动鼓有限公司 | Vanadium titanium cast iron brake drum and preparation method thereof |
| CN106001452A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Brake drum casting process |
| CN106756278A (en) * | 2016-12-27 | 2017-05-31 | 温州瑞尔金属制造有限公司 | A kind of preparation technology of ball valve body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109317611A (en) * | 2018-11-15 | 2019-02-12 | 安徽应流集团霍山铸造有限公司 | A kind of sand mould casting method of nickel base superalloy casting |
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Application publication date: 20171027 |