CN108220751A - The manufacturing method and brake drum of a kind of brake drum - Google Patents
The manufacturing method and brake drum of a kind of brake drum Download PDFInfo
- Publication number
- CN108220751A CN108220751A CN201711267975.0A CN201711267975A CN108220751A CN 108220751 A CN108220751 A CN 108220751A CN 201711267975 A CN201711267975 A CN 201711267975A CN 108220751 A CN108220751 A CN 108220751A
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- brake drum
- raw material
- mounting portion
- ontology
- molten iron
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 52
- 229910052742 iron Inorganic materials 0.000 claims description 26
- 230000007704 transition Effects 0.000 claims description 20
- 244000035744 Hura crepitans Species 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 11
- 239000011733 molybdenum Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
- 238000009747 press moulding Methods 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 229910000805 Pig iron Inorganic materials 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 229910001060 Gray iron Inorganic materials 0.000 abstract description 10
- 238000005266 casting Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 15
- 230000002929 anti-fatigue Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/10—Drums for externally- or internally-engaging brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0008—Ferro
- F16D2200/0021—Steel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0007—Casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/003—Chip removing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to a kind of manufacturing methods of brake drum, include the following steps：S1. raw material is prepared；S2. melting；S3. creepage rate；S4. it pours into a mould；S5. it is cooled and shaped.The manufacturing method of the brake drum of the present invention carries out brake drum integrated casting, reduces secondary operation, reduces manufacturing procedure and cost；For its brake drum produced compared with mutually isostructural gray cast iron brake drum, service life can improve 50 100%.The invention also discloses a kind of brake drum, including brake drum ontology and mounting portion；The mounting portion is annular, and the mounting portion is set to one end of the brake drum ontology, multiple mounting holes of circumferentially array distribution are provided on the mounting portion, lightening hole is arranged at intervals between the multiple mounting hole；The inner wall of the brake drum ontology is provided with friction portion, and outer wall is provided with the stiffening ring of annular.The brake drum of the present invention has many advantages, such as that simple in structure, lightweight, intensity are high.
Description
Technical field
The present invention relates to brake drum field, more particularly to the manufacturing method and brake drum of a kind of brake drum.
Background technology
Brake drum is main braking member in vehicle bridge braking system.Automobile passes through brake block and brake drum in braking
The rubbing action of inner wall generates brake force.The rubbing action of brake drum inner wall and brake block generates braking effect, rubbed
Cheng Zhonghui generates heat, and in friction process and after stopping friction, the different parts of brake drum also will appear the situation of hot and cold alternation,
This just needs brake drum to have good wearability, thermal conductivity and thermal fatigue resistance.
It is shown according to statistical data, at present, brake drum cracking accounts for more than the 80% of failure conditions, and cracks mainly by heat
Caused by fatigue crack.Existing brake drum is generally cast using gray cast iron, and the heat-resistant anti-fatigue performance of gray cast iron is poor,
Easily make brake drum that cracking phenomena occur, brake system is made to break down, directly jeopardizes the traffic safety of vehicle.
In addition, the heavier-weight of existing brake drum, not only increases the total weight of braking system, and also need to more
Cast iron materials, increase casting cost, therefore, under the premise of the intensity and mechanical property of brake drum is not influenced, realize system
Moving the lightweight of drum becomes more and more urgent；The mounting hole of existing brake drum is not that direct integration casting is completed, need into
Row secondary operation, increases manufacturing procedure, influences production efficiency, while also increase processing cost.
Invention content
Based on this, the object of the present invention is to provide a kind of manufacturing methods of brake drum, include the following steps：
S1. raw material is prepared：
By following material preparation raw material by mass percentage：The pig iron 30%, steel scrap 60%, foundry returns 10%；And add in molybdenum
And copper, quality are equivalent to the 0.25-0.5% and 0.4-0.8% of the raw material gross mass；
S2. melting：
The raw material prepared in S1 is put into melting in smelting furnace, the tapping temperature of molten iron is arranged on 1500 ± 20 DEG C；
S3. creepage rate：
Magnesium-rare earth vermiculizer is added at ladle bottom, molten iron obtained in S2 is poured into ladle, using pouring
Method is bred and creepage rate；
S4. it pours into a mould：
Molten iron after creepage rate in S3 is subjected to constant-temperature quantitative cast, pouring temperature 1395 by pouring furnace to sandbox
± 5 DEG C, wherein, sandbox makes tide mould sand static press moulding, the tide mould static press moulding packet according to the design shape and specification of brake drum
Include the moulding of brake drum ontology and its stiffening ring, mounting portion and its mounting hole and lightening hole；
S5. it is cooled and shaped：
Molten iron in S4 cheeks is cooled into brake drum, brake drum is taken out from sandbox, and ball blast is carried out to it
And polishing.
The manufacturing method of the brake drum of the present invention carries out brake drum integrated casting, reduces secondary operation, reduces processing
Process and cost；Its brake drum produced is vermicular cast iron brake drum, and vermicular graphite cast iron is filled in worm, between sheet and ball
Between shape, the mechanical property of vermicular cast iron is significantly better than gray cast iron so that vermicular cast iron brake drum has outstanding heat-resistant anti-fatigue
And mechanical property, compared with mutually isostructural gray cast iron brake drum, service life can improve 50-100%.
Further, S6. detections are further included：Brake drum after polishing in S5 is detected.
Further, in the S1, the quality for adding in molybdenum is equivalent to the 0.25-0.3% of the raw material gross mass.
Further, in the S1, the quality for adding in copper is equivalent to the 0.4-0.6% of the raw material gross mass.
Further, in the S3, molten iron obtained in S2 is bred and creepage rate, and make its nodulizing rate >=
70%.
Relative to the prior art, the manufacturing method of brake drum of the invention carries out brake drum integrated casting, reduces two
Secondary processing reduces manufacturing procedure and cost；Its brake drum produced is vermicular cast iron brake drum, and vermicular graphite cast iron is in worm
Dress, between sheet and it is spherical between, the mechanical property of vermicular cast iron is significantly better than gray cast iron so that vermicular cast iron brake drum has
Outstanding heat-resistant anti-fatigue and mechanical property, compared with mutually isostructural gray cast iron brake drum, service life can improve 50-
100%, it is possible to reduce because of a large amount of financial resources, the material resources that brake drum is frequently replaced and wastes, it is often more important that, greatly reduce vapour
Defective drum may cause the possibility of car crash in vehicle driving process, have good social benefit.
The present invention also provides a kind of brake drum, including brake drum ontology and mounting portion；The mounting portion is annular, described
Mounting portion is set to one end of the brake drum ontology, and multiple installations of circumferentially array distribution are provided on the mounting portion
Hole is arranged at intervals with lightening hole between the multiple mounting hole；The inner wall of the brake drum ontology is provided with friction portion, outer wall
It is provided with the stiffening ring of annular.
The brake drum of the present invention in mounting portion by setting lightening hole, under the premise of the intensity for ensureing mounting portion, mitigates
The overall weight of brake drum realizes lightweight；The stiffening ring of brake drum body outer wall setting can improve the strong of brake drum ontology
Degree.
Further, transition connection portion is further included, the transition connection portion is connected to the brake drum ontology and the peace
Between dress portion, the diameter of one end that the transition connection portion is connect with the brake drum ontology is connect more than it with the mounting portion
One end diameter.
Further, the junction of the transition connection portion and the brake drum ontology is additionally provided with equally distributed multiple
Reinforcing rib.
Further, the reinforcing rib is three.
Further, the lightening hole is blind hole, and the lightening hole is located on the inner wall of the mounting portion.
Further, the hole depth of the lightening hole is more than the 1/2 of the mounting portion wall thickness.
Further, the lightening hole is rectangular.
Further, the stiffening ring is located on the end outer wall of the brake drum ontology.
Further, the mounting hole is ten.
Further, it is fabricated by following steps：
S1. raw material is prepared：
By following material preparation raw material by mass percentage：The pig iron 30%, steel scrap 60%, foundry returns 10%；And add in molybdenum
And copper, quality are equivalent to the 0.25-0.5% and 0.4-0.8% of the raw material gross mass；
S2. melting：
The raw material prepared in S1 is put into melting in smelting furnace, the tapping temperature of molten iron is arranged on 1500 ± 20 DEG C；
S3. creepage rate：
Magnesium-rare earth vermiculizer is added at ladle bottom, the magnesium-rare earth vermiculizer accounts for the raw material gross mass
0.5-0.8% pours into molten iron obtained in S2 in ladle, is bred using the method for pouring and creepage rate；
S4. it pours into a mould：
Molten iron after creepage rate in S3 is subjected to constant-temperature quantitative cast, pouring temperature 1395 by pouring furnace to sandbox
± 5 DEG C, wherein, sandbox makes tide mould sand static press moulding, the tide mould static press moulding packet according to the design shape and specification of brake drum
Include the moulding of brake drum ontology and its stiffening ring, mounting portion and its mounting hole and lightening hole；
S5. it is cooled and shaped：
Molten iron in S4 cheeks is cooled into brake drum, brake drum is taken out from sandbox, and ball blast is carried out to it
And polishing.
Relative to the prior art, brake drum of the invention is ensureing the strong of mounting portion by setting lightening hole in mounting portion
Under the premise of degree, mitigate the overall weight of brake drum, realize lightweight；The stiffening ring of brake drum body outer wall setting can improve
The intensity of brake drum ontology；The reinforcing rib that the junction of transition connection portion and the brake drum ontology is set can make brake drum sheet
Body connect with transition connection portion it is more secured, avoid brake drum in the running fall top.The present invention brake drum have it is simple in structure,
The advantages that lightweight, high intensity.
In order to better understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the brake drum of the present invention.
Fig. 2 is the internal structure schematic diagram of the brake drum of the present invention.
Specific embodiment
Embodiment one
The manufacture of a kind of manufacturing method of brake drum provided by the invention and the brake drum of the present embodiment, include with
Lower step：
S1. raw material is prepared：
By following material preparation raw material by mass percentage：The pig iron 30%, steel scrap 60%, foundry returns 10%；And add in molybdenum
And copper, quality are equivalent to the 0.25-0.5% and 0.4-0.8% of the raw material gross mass.
The quality that the present embodiment adds in molybdenum is equivalent to the 0.25% of the raw material gross mass.
The quality that the present embodiment adds in copper is equivalent to the 0.5% of the raw material gross mass.
The percentage that the molybdenum and copper that the present embodiment adds in account for the raw material gross mass is preferred forms, can make iron
The nodulizing rate of water reaches highest, and the thermal fatigue resistance of final brake drum obtained and mechanical property is made to reach best.
S2. melting：
The raw material prepared in S1 is put into melting in smelting furnace, the tapping temperature of molten iron is 1500 ± 20 DEG C, this goes out furnace temperature
Degree the present embodiment is preferably set to 1500 DEG C.
S3. creepage rate：
Magnesium-rare earth vermiculizer is added at ladle bottom, the magnesium-rare earth vermiculizer accounts for the raw material gross mass
0.5-0.8% pours into molten iron obtained in S2 in ladle, is bred using the method for pouring and creepage rate.
The present embodiment is bred molten iron obtained in S2 and creepage rate, and makes its nodulizing rate >=70%.By compactedization
Rate is controlled more than 70%, can make the graphite and Fining of Pearlite of molding brake drum, and make the content increase of pearlite simultaneously
Reach more than 70%, so as to improve the mechanical property of brake drum, its tensile strength is made to reach 380-500Mpa, elongation percentage 2-
6%, hardness HB140-200.
S4. it pours into a mould：
Molten iron after creepage rate in S3 is subjected to constant-temperature quantitative cast, pouring temperature 1395 by pouring furnace to sandbox
DEG C, wherein, sandbox makes tide mould sand static press moulding according to the design shape and specification of brake drum, which includes system
Dynamic drum ontology 1 and its stiffening ring 12, transition connection portion 3, transition connection portion 3 and the reinforcing rib 4 of 1 junction of brake drum ontology, peace
The moulding of dress portion 2 and its mounting hole 21 and lightening hole 22 (please refers to Fig.1 and Fig. 2.).
S5. it is cooled and shaped：
Molten iron in S4 cheeks is cooled into brake drum, brake drum is taken out from sandbox, and ball blast is carried out to it
And polishing.
S6. it detects：
Brake drum after polishing in S5 is detected.
Relative to the prior art, the manufacturing method of brake drum of the invention carries out brake drum integrated casting, reduces two
Secondary processing reduces manufacturing procedure and cost；Its brake drum produced is vermicular cast iron brake drum, and vermicular graphite cast iron is in worm
Dress, between sheet and it is spherical between, the mechanical property of vermicular cast iron is significantly better than gray cast iron so that vermicular cast iron brake drum has
Outstanding heat-resistant anti-fatigue and mechanical property, compared with mutually isostructural gray cast iron brake drum, service life can improve 50-
100%, it is possible to reduce because of a large amount of financial resources, the material resources that brake drum is frequently replaced and wastes, it is often more important that, greatly reduce vapour
Defective drum may cause the possibility of car crash in vehicle driving process, have good social benefit.
Please refer to Fig.1 and Fig. 2, Fig. 1 be the present invention brake drum dimensional structure diagram.Fig. 2 is the braking of the present invention
Bulging internal structure schematic diagram.The brake drum of the present invention, including brake drum ontology 1, mounting portion 2 and transition connection portion 3, the mistake
Connecting portion 3 is crossed to be connected between the brake drum ontology 1 and the mounting portion 2.
Specifically, the inner wall of the brake drum ontology 1 is provided with friction portion 11, and the friction portion 11 arises from the brake drum
Ontology and the junction of the transition connection portion 3, terminate in the openend of the brake drum ontology 1, which is used for and brake
Vehicle piece generates friction and generates braking effect.The outer wall of the brake drum ontology 1 is provided with the stiffening ring 12 of annular, the present embodiment
The stiffening ring 12 be located on the end outer wall of the brake drum ontology 1.Stiffening ring 12 can improve the strong of brake drum ontology 1
Degree.After the completion of casting, 12 position of stiffening ring can form parting burr, and parting burr needs polish off, can be by automatic
Sander clamps mounting portion 2 and carries out automatically grinding.
The mounting portion 2 is annular, and the mounting portion 2 is set to one end of the brake drum ontology 1, the mounting portion 2
On be provided with multiple mounting holes 21 of circumferentially array distribution, be arranged at intervals with lightening hole 22 between the multiple mounting hole 21.
The mounting hole 21 of the present embodiment is preferably set to ten.It can be by the mounting hole 21 by mounting portion 2
It is installed on the wheel hub of vehicle bridge.
The lightening hole 22 can mitigate the overall weight of brake drum, realize lightweight.In order to avoid influencing the installation
The intensity in portion 2, the lightening hole 22 are set as blind hole, and the lightening hole 22 is located on the inner wall of the mounting portion 2, the loss of weight
The hole depth in hole 22 is more than the 1/2 of 2 wall thickness of mounting portion.The lightening hole 22 of the present embodiment is preferably set to rectangular.
The diameter of one end that the transition connection portion 3 is connect with the brake drum ontology 1 connects more than it with the mounting portion 2
The diameter of the one end connect.
The present embodiment is preferably additionally provided with uniformly in the junction of the transition connection portion 3 and the brake drum ontology 1
Multiple reinforcing ribs 4 of distribution.The reinforcing rib 4 is convex structure, can be ear boss, circular arc boss or strip boss
Deng, can make brake drum ontology 1 connect with transition connection portion 3 more securely, avoid brake drum in the running because of brake drum sheet
Body 1 is insufficient with 2 bonding strength of mounting portion and is broken.The present embodiment is preferably in the transition connection portion 3 and brake drum sheet
The junction of body 1 is provided with three reinforcing ribs 4, so as to ensure bonding strength equilibrium.
Relative to the prior art, brake drum of the invention is ensureing the strong of mounting portion by setting lightening hole in mounting portion
Under the premise of degree, mitigate the overall weight of brake drum, realize lightweight；The stiffening ring of brake drum body outer wall setting can improve
The intensity of brake drum ontology；The reinforcing rib that the junction of transition connection portion and the brake drum ontology is set can make brake drum sheet
Body connect with transition connection portion it is more secured, avoid brake drum in the running fall top.The present invention brake drum have it is simple in structure,
The advantages that lightweight, high intensity.
Embodiment two
The manufacturing method of the brake drum of the present embodiment is roughly the same with the manufacturing method of the brake drum of embodiment one, difference
It is in in the S1 of the present embodiment, the quality for adding in molybdenum is equivalent to the 0.3% of the raw material gross mass, adds in the matter of copper
Amount is equivalent to the 0.4% of the raw material gross mass.
The tapping temperature of molten iron is 1480 DEG C in the S2 of the present embodiment.
Pouring temperature in the S3 of the present embodiment is 1390 DEG C.
The structure of the brake drum of the present embodiment is identical with the structure of the brake drum of embodiment one.
Embodiment three
The manufacturing method of the brake drum of the present embodiment is roughly the same with the manufacturing method of the brake drum of embodiment one, difference
It is in in the S1 of the present embodiment, the quality for adding in molybdenum is equivalent to the 0.5% of the raw material gross mass, adds in the matter of copper
Amount is equivalent to the 0.8% of the raw material gross mass.
The tapping temperature of molten iron is 1520 DEG C in the S2 of the present embodiment.
Pouring temperature in the S3 of the present embodiment is 1400 DEG C.
The structure of the brake drum of the present embodiment is identical with the structure of the brake drum of embodiment one.
Relative to the prior art, the manufacturing method of brake drum of the invention carries out brake drum integrated casting, reduces two
Secondary processing reduces manufacturing procedure and cost；Its brake drum produced is vermicular cast iron brake drum, and vermicular cast iron brake drum has
Outstanding heat-resistant anti-fatigue and mechanical property, compared with mutually isostructural gray cast iron brake drum, service life can improve 50-
100%, it is possible to reduce because of a large amount of financial resources, the material resources that brake drum is frequently replaced and wastes, it is often more important that, greatly reduce vapour
Defective drum may cause the possibility of car crash in vehicle driving process, have good social benefit.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that those of ordinary skill in the art are come
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.
Claims (15)
1. a kind of manufacturing method of brake drum, includes the following steps：
S1. raw material is prepared：
By following material preparation raw material by mass percentage：The pig iron 30%, steel scrap 60%, foundry returns 10%；And molybdenum and copper are added in,
Its quality is equivalent to the 0.25-0.5% and 0.4-0.8% of the raw material gross mass；
S2. melting：
The raw material prepared in S1 is put into melting in smelting furnace, the tapping temperature of molten iron is arranged on 1500 ± 20 DEG C；
S3. creepage rate：
Magnesium-rare earth vermiculizer is added at ladle bottom, the magnesium-rare earth vermiculizer accounts for the 0.5- of the raw material gross mass
0.8%, molten iron obtained in S2 is poured into ladle, is bred using the method for pouring and creepage rate；
S4. it pours into a mould：
Molten iron after creepage rate in S3 is subjected to sandbox constant-temperature quantitative cast by pouring furnace, pouring temperature is 1395 ± 5
DEG C, wherein, sandbox makes tide mould sand static press moulding according to the design shape and specification of brake drum, which includes system
The moulding of dynamic drum ontology and its stiffening ring, mounting portion and its mounting hole and lightening hole；
S5. it is cooled and shaped：
Molten iron in S4 cheeks is cooled into brake drum, brake drum is taken out from sandbox, and ball blast is carried out to it and is beaten
Mill.
2. the manufacturing method of brake drum according to claim 1, it is characterised in that：Further include S6. detections：To polishing in S5
Brake drum afterwards is detected.
3. the manufacturing method of brake drum according to claim 1, it is characterised in that：In the S1, the quality phase of molybdenum is added in
When in the 0.25-0.3% of the raw material gross mass.
4. according to the manufacturing method of claim 1-3 any one of them brake drums, it is characterised in that：In the S1, copper is added in
Quality be equivalent to the 0.4-0.6% of the raw material gross mass.
5. according to the manufacturing method of claim 1-3 any one of them brake drums, it is characterised in that：It, will be in S2 in the S3
Molten iron obtained is bred and creepage rate, and makes its nodulizing rate >=70%.
6. a kind of brake drum, it is characterised in that：Including brake drum ontology and mounting portion；The mounting portion is annular, the installation
Portion is set to one end of the brake drum ontology, and multiple mounting holes of circumferentially array distribution, institute are provided on the mounting portion
It states and is arranged at intervals with lightening hole between multiple mounting holes；The inner wall of the brake drum ontology is provided with friction portion, outer wall setting
There is the stiffening ring of annular.
7. brake drum according to claim 6, it is characterised in that：Transition connection portion is further included, the transition connection portion connects
It is connected between the brake drum ontology and the mounting portion, one end that the transition connection portion is connect with the brake drum ontology
Diameter is more than its diameter of one end being connect with the mounting portion.
8. brake drum according to claim 7, it is characterised in that：The transition connection portion and the company of the brake drum ontology
The place of connecing is additionally provided with equally distributed multiple reinforcing ribs.
9. brake drum according to claim 8, it is characterised in that：The reinforcing rib is three.
10. brake drum according to claim 6, it is characterised in that：The lightening hole is blind hole, and the lightening hole is located at institute
It states on the inner wall of mounting portion.
11. brake drum according to claim 10, it is characterised in that：The hole depth of the lightening hole is more than the mounting portion wall
Thick 1/2.
12. brake drum according to claim 6, it is characterised in that：The lightening hole is rectangular.
13. brake drum according to claim 6, it is characterised in that：The stiffening ring is located at the end of the brake drum ontology
It holds on outer wall.
14. brake drum according to claim 6, it is characterised in that：The mounting hole is ten.
15. according to claim 6-14 any one of them brake drums, it is characterised in that：It is fabricated by following steps：
S1. raw material is prepared：
By following material preparation raw material by mass percentage：The pig iron 30%, steel scrap 60%, foundry returns 10%；And molybdenum and copper are added in,
Its quality is equivalent to the 0.25-0.5% and 0.4-0.8% of the raw material gross mass；
S2. melting：
The raw material prepared in S1 is put into melting in smelting furnace, the tapping temperature of molten iron is arranged on 1500 ± 20 DEG C；
S3. creepage rate：
Magnesium-rare earth vermiculizer is added at ladle bottom, the magnesium-rare earth vermiculizer accounts for the 0.5- of the raw material gross mass
0.8%, molten iron obtained in S2 is poured into ladle, is bred using the method for pouring and creepage rate；
S4. it pours into a mould：
Molten iron after creepage rate in S3 is subjected to sandbox constant-temperature quantitative cast by pouring furnace, pouring temperature is 1395 ± 5
DEG C, wherein, sandbox makes tide mould sand static press moulding according to the design shape and specification of brake drum, which includes system
The moulding of dynamic drum ontology and its stiffening ring, mounting portion and its mounting hole and lightening hole；
S5. it is cooled and shaped：
Molten iron in S4 cheeks is cooled into brake drum, brake drum is taken out from sandbox, and ball blast is carried out to it and is beaten
Mill.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109458409A (en) * | 2018-12-30 | 2019-03-12 | 河北百龙汽车配件制造有限公司 | A kind of heavy-duty car combined type ANTI LOCK drum |
| CN111114197A (en) * | 2019-11-15 | 2020-05-08 | 张译 | Bimetallic brake hub shell, metal wheel, cylindrical metal component and manufacturing method thereof |
| CN111139396A (en) * | 2019-12-23 | 2020-05-12 | 山东时风（集团）有限责任公司 | Intelligent preparation method of vermicular cast iron brake drum |
| CN111207167A (en) * | 2018-11-22 | 2020-05-29 | 梅州市洪裕汽车配件制造有限公司 | Heat-resistant brake drum |
| CN117267285A (en) * | 2023-11-21 | 2023-12-22 | 山西汤荣机械制造股份有限公司 | Brake drum convenient to heat dissipation and casting device thereof |
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| CN111139396A (en) * | 2019-12-23 | 2020-05-12 | 山东时风（集团）有限责任公司 | Intelligent preparation method of vermicular cast iron brake drum |
| CN117267285A (en) * | 2023-11-21 | 2023-12-22 | 山西汤荣机械制造股份有限公司 | Brake drum convenient to heat dissipation and casting device thereof |
| CN117267285B (en) * | 2023-11-21 | 2024-02-02 | 山西汤荣机械制造股份有限公司 | Brake drum convenient to heat dissipation and casting device thereof |
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Application publication date: 20180629 |