CN106735094A - The manufacture method of bi-metal brake drum - Google Patents
The manufacture method of bi-metal brake drum Download PDFInfo
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- CN106735094A CN106735094A CN201611257073.4A CN201611257073A CN106735094A CN 106735094 A CN106735094 A CN 106735094A CN 201611257073 A CN201611257073 A CN 201611257073A CN 106735094 A CN106735094 A CN 106735094A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 14
- 238000005266 casting Methods 0.000 claims abstract description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 25
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 5
- 238000007528 sand casting Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 2
- 230000009471 action Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000010998 test method Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 229910001060 Gray iron Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to the manufacture of brake drum, a kind of manufacture method of bi-metal brake drum is disclosed, comprised the following steps：Mild steel silk screen is struck out the drum type structure coordinated with brake drum wall；Successively produce top box sand mold die cavity and carry the nowel sand mold die cavity of core；By drum type radome structure on the core that nowel sand mold is carried；Upper and lower two casees sand molds mould assembling, and molten iron of casting, knockout of being unpacked after molten steel solidification pour out brake drum base, and brake drum base continues to be air cooled to room temperature；Drum type structure is with the distance of the outer face of brake drum（1/3）d.There is mild steel silk screen and its structure due to inside brake drum in the present invention, there is certain chilling action during molten iron casting solidification, brake drum is eliminated in braking surface root and the shrinkage cavity shrinkage porosity phenomenon of top flange corner, during use, solve the problems, such as that brake drum takes off top, the extension of crackle can be separately hindered, and improves the tensile strength of brake drum and the service life of brake drum；Brake drum is difficult to split and temperature distortion cruelly.
Description
Technical field
The present invention relates to the manufacture of brake drum, more particularly to a kind of manufacture method of bi-metal brake drum.
Background technology
The manufacture method of heavy truck car brake drum is divided into the country：Homogenous material one piece casting type and bimetallic material welding
Formula.The material that homogenous material one piece casting type brake drum is used is generally grey cast-iron, spheroidal graphite cast-iron, vermicular cast iron；Bimetallic
It is antiwear cast iron alloy that material fusing type brake drum uses braking surface, and outer ring is high-strength toughness steel.Homogenous material monoblock cast
The brake drum shortcoming of full cast iron：Surface temperature is high, easily form hard spot when low intensity, thickness are big, heat conductivility is poor, brake drum works
And hot tearing is produced, especially it is easily broken when heavy braking or frequently braking is run at high speed.Bimetallic material fusing type brake drum
Though during work outside in the presence of steel ring processed, heat conductivility increases, and whole brake drum seldom occurs being completely severed, outward
Steel ring processed is heated under heavy duty for a long time, is easily deformed, and influences braking effect, and the brake drum of bimetallic material fusing type to manufacture
Process is more complicated than the brake drum of homogenous material one piece casting type and strict, and manufacturing cost is also higher.
The content of the invention
The present invention is directed to big low intensity, thickness in the prior art, poor heat conductivity, is easily heated and ruptures or easily temperature distortion influence
The shortcoming of service life, there is provided a kind of manufacture method of bi-metal brake drum, its intensity is high, can reduce quality, square crackle, no
Temperature distortion can be burst and be difficult, service life is improved.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals：
The manufacture method of bi-metal brake drum, comprises the following steps：
Mild steel silk screen is struck out step 1. the drum type structure coordinated with brake drum wall, the maximum gauge and height of drum type structure
Coordinated according to the braking surface diameter on brake drum drawing and depth；
According to brake drum drawing, using upper and lower two casees sand casting process, parting die joint is arranged on brake drum reinforcement to step 2.
Band is middle, successively produces top box sand mold die cavity and carries the nowel sand mold die cavity of core；
Be enclosed within drum type structure on the core that nowel sand mold is carried by step 3.；
Top box sand mold and the mould assembling of nowel sand mold are formed casting cavity by step 4., and with the running channel of connection casting cavity, after
Molten iron is poured into casting cavity by running channel until pouring full, after casting finishes wait at least 15min, then knockout of unpacking pours out system
Dynamic drum base, brake drum base continues to be air cooled to room temperature；
Step 5. brake drum base is machined to brake drum again after being cooled to room temperature.
Preferably, in step 1, the mesh of mild steel silk screen is 10*10mm, mesh wire diameter is 2mm.
Preferably, in step 4, the temperature of molten iron is between 1400-1430 DEG C.
Preferably, make the wall thickness of brake drum for d, drum type structure buries casting in the wall of brake drum, drum type structure and braking
The distance of bulging outer face exists（2/7）d-（2/5）Between d.
Preferably, drum type structure is with the distance of the outer face of brake drum（1/3）d.
Preferably, in step 1, it is first that mild steel silk-screen blanking is circular during punching press drum type structure, then using concavo-convex
Circle is struck out upper end by mould casted die mould has the drum type structure of the ring surface coordinated with the wall of brake drum upper end.
Preferably, drum type structure has upper shed and under shed, upper shed is located at the middle part of ring surface, ring surface and drum
The sidepiece of type structure is integral type structure.
The present invention as a result of above technical scheme, with significant technique effect：
The brake drum that this manufacture method is applied to middle heavy truck car is manufactured.
1., because mild steel silk screen has certain chilling action during molten iron casting solidification, eliminate using upper and lower
The shrinkage cavity and porosity of brake drum that two casees sand casting process are manufactured in braking surface root and top flange corner shows
As preventing brake drum during entrucking use, because of the phenomenon that fine and close will not cause de- top of inside brake drum material；
2., because inside brake drum has mild steel silk screen and its structure, during brake drum entrucking use, can hinder to split
The extension of line, improves the service life of brake drum；When running at high speed heavy braking or frequently braking, brake drum will not be caused to dash forward
So the brake drum fragment that flies out is split cruelly；
3. because brake drum is in the absence of the steel ring of outer layer, but netted mild steel wire web frame, heat conductivility internally be present
Increased, and strengthen the tensile strength of whole brake drum, in heavily loaded high speed heavy braking, heavy duty braking for a long time, heavy duty
Frequently temperature distortion is not easily leaded under braking；
4. the casting body part of casting mild steel silk screen is buried, by GB/T 9439-2010《Gray iron casting》It is real that stretching is processed into sampling
Test and use coupon, by GB/T 228.1-2010《Metal material stretching test part 1：Greenhouse test method》Do tension test,
Tensile strength >=the 250MPa of the brake drum that the present invention is manufactured；
5. due to the reduction of inside brake drum mass defect, and mild steel silk screen invigoration effect, ensure brake drum use
Under life situations, can be compared with existing brake drum manufacture method, it is possible to decrease at least 10% brake drum with lightweight brake drum
Weight；
6. this manufacture method is simple in addition and input and the cost of manufacture it is relatively low, due to the manufacture of bimetallic material fusing type
Method, the tonnage of its pressing equipment that need to be put into is bigger than the tonnage of the pressing equipment needed for manufacture method of the invention；And
The manufacture method of bimetallic material fusing type, its outer layer steel ring need to increase removing surface and mach equipment, increased processing
Cost, and manufacture method of the invention need not these inputs.
Brief description of the drawings
Fig. 1 is sectional structure chart when top box sand mold and nowel sand mold are separated when the embodiment of the present invention puts drum type structure.
Sectional structure chart when Fig. 2 is top box sand mold and nowel sand mold mould assembling.
Fig. 3 is the sectional structure chart of the brake drum for manufacturing.
Sectional structure chart when Fig. 4 is concave-convex mold casted die mould punching press drum type structure.
The toponym that each number designation is referred in accompanying drawing is as follows：Wherein 1-drum type structure, 2-top box sand mold, 3-
Nowel sand mold, 4-core, 5-brake drum, 6-reinforcing strip, 7-casting cavity, 8-concave-convex mold casted die mould, 9-ring surface.
Specific embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment
The manufacture method of bi-metal brake drum, as shown in Figures 1 to 4, comprises the following steps：
The mild steel silk-screen blanking that mesh is first 10*10mm by step 1., mesh wire diameter is 2mm is circular, then using concavo-convex
Circle is struck out upper end by mould casted die mould 1 has the drum type structure 1 of the ring surface coordinated with the wall of the upper end of brake drum 5, drum type
The maximum gauge and height of structure 1 coordinate according to the braking surface diameter on the drawing of brake drum 5 and depth；Drum type structure 1 has upper
Opening and under shed, upper shed are located at the middle part of ring surface 9, and ring surface 9 is integral type structure with the sidepiece of drum type structure 1；Through
Cross repetition test to draw, if mesh is less than 2mm more than 10*10mm, mesh wire diameter, mixed with molten iron after mild steel silk screen is completely melt
Close, cause the effect without the netted reinforcing of mild steel wire；If mesh is more than 2mm less than 10*10mm, mesh wire diameter, fusion can be produced
Bad, effect is poor.
According to the drawing of brake drum 5, using upper and lower two casees sand casting process, parting die joint is arranged on brake drum to step 2.
In the middle of 5 reinforcing strips 6, successively produce the die cavity of top box sand mold 2 and carry the die cavity of nowel sand mold 3 of core 4；
Be enclosed within drum type structure 1 on the core 4 that nowel sand mold is carried by step 3.；In the present embodiment, using V method casting techniques,
After molten iron casting, without being vibrated, processing step and manufacturing time are saved.
Top box sand mold 2 and the mould assembling of nowel sand mold 3 are formed casting cavity 7 by step 4., and with connection casting cavity 7
Running channel, after molten iron by temperature between 1400-1430 DEG C casting cavity 7 is poured into by running channel, until pouring full, casting is finished
After after 15min, then knockout of unpacking pours out brake drum base, and brake drum base continues to be air cooled to room temperature；Because of the brake drum base wall for manufacturing
Thickness is generally 15-40mm, therefore casting finishes the time at least 15min of rear molten steel solidification, through experimental verification repeatedly, finds
Situations below occurs less than the unpacking knockouts of 15min：1st, because brake drum base temperature is also very high, expose in atmosphere, brake drum
The cooling extent of base increases suddenly, and white structure easily occurs in surface；2nd, brake drum base does not completely set up set strength also, easily
The phenomenon for deforming.
Step 5. brake drum base is machined to brake drum 5 again after being cooled to room temperature.
The wall thickness of brake drum 5 is made for d, drum type structure 1 buries casting in the wall of brake drum 5, drum type structure 1 and brake drum 5
The distance of outer face exists（2/7）d-（2/5）Between d, in the present embodiment, the distance of the outer face of drum type structure 1 and brake drum 5
For（1/3）d.
Drum type structure 1 is the mild steel silk screen of individual layer.
Case 1：Applicant manufactures CF1191H9C brake drums according to above-mentioned manufacture method, and its effect is as follows：
Using V method casting techniques, got the raw materials ready by 1., 2. melting antifriction alloy molten iron, 3. the moulding of mild steel silk screen, 4. place drum type
Structure（1）, mould assembling is 5. positioned, to be cast after 6. detecting molten iron temperature, the 7. cooling to be solidified such as static, knockout of 8. unpacking 9. is cleared up
Casting, 10. blank machining.The CF1191H9C brake drums for finally giving are in braking surface root and top flange corner without contracting
Hole shrinkage porosite phenomenon, weight is mitigated to 56.8kg by the brake drum weight 63.5kg that original method is made, and alleviates 6.7kg（Subtract
It is light by 10.55%）；Casting mild steel silk screen casting body part sampling processing coupon is buried, by GB/T 228.1-2010《Metal material
Tension test part 1：Greenhouse test method》Tension test is done, its tensile strength is 310MPa, 315MPa, 316MPa, original
The tensile strength of the casting body that the method come is made is less than or equal to 250 MPa；By QC/T 316-1999《Running is braked
Device fatigue strength Bench test methods》Bench test is done, torsional fatigue strength is 238053 brake drum crackings and 234175 times
Brake drum ftractures, and the torsional fatigue strength of the casting body that original method is made is less than 198000 brake drums crackings.
Case 2：Applicant manufactures CF1191H5D brake drums according to above-mentioned manufacture method, and its effect is as follows：
Using V method casting techniques, got the raw materials ready by 1., 2. melting antifriction alloy molten iron, 3. the moulding of mild steel silk screen, 4. place drum type
Structure（1）, mould assembling is 5. positioned, to be cast after 6. detecting molten iron temperature, the 7. cooling to be solidified such as static, knockout of 8. unpacking 9. is cleared up
Casting, 10. blank machining.Final CF1191H5D brake drums are in braking surface root and top flange corner without shrinkage cavity shrinkage porosity
Phenomenon, weight is mitigated to 53.9kg by the brake drum 60kg that original method is made, and alleviates 6.1kg（Alleviate 10.17%）,
Casting mild steel silk screen casting body part sampling processing coupon is buried, by GB/T 228.1-2010《Metal material stretching test
1 part：Greenhouse test method》Do tension test, tensile strength is 308MPa, 312MPa, 305MPa, what original method was made
The tensile strength of casting body is less than or equal to 245 MPa；By QC/T 316-1999《Running brake fatigue strength stand
Test method》Bench test is done, torsional fatigue strength is that 226150 brake drum crackings and 225978 brake drums ftracture, originally
The torsional fatigue strength of casting body that is made of method less than 197500 brake drums crackings.
In a word, presently preferred embodiments of the present invention, all equalizations made according to scope of the present invention patent be the foregoing is only
Change and modification, should all belong to the covering scope of patent of the present invention.
Claims (7)
1. the manufacture method of bi-metal brake drum, it is characterised in that：Comprise the following steps：
Step 1. strikes out and brake drum mild steel silk screen（5）The drum type structure that wall coordinates（1）, drum type structure（1）Maximum
Diameter and height are according to brake drum（5）Braking surface diameter and depth on drawing coordinate；
Step 2. is according to brake drum（5）Drawing, using upper and lower two casees sand casting process, parting die joint is arranged on brake drum
（5）Reinforcing strip（6）Centre, successively produces top box sand mold（2）Die cavity and carry core（4）Nowel sand mold（3）Die cavity；
Step 3. is by drum type structure（1）It is enclosed within nowel sand mold（3）The core for carrying（4）On；
Step 4. is by top box sand mold（2）With nowel sand mold（3）Mould assembling forms casting cavity（7）, and with connection casting cavity
（7）Running channel, after molten iron is poured into casting cavity by running channel（7）It is interior full up to pouring, after casting finishes wait at least 15min,
Knockout of unpacking again pours out brake drum base, and brake drum base continues to be air cooled to room temperature；
Step 5. brake drum base is machined to brake drum again after being cooled to room temperature（5）.
2. the manufacture method of bi-metal brake drum according to claim 1, it is characterised in that：In step 1, mild steel silk screen
Mesh for 10*10mm, mesh wire diameter be 2mm.
3. the manufacture method of bi-metal brake drum according to claim 1, it is characterised in that：In step 4, the temperature of molten iron
Between 1400-1430 DEG C.
4. the manufacture method of bi-metal brake drum according to claim 1, it is characterised in that：Make brake drum（5）Wall thickness
It is d, drum type structure（1）Casting is buried in brake drum（5）Wall in, drum type structure（1）With brake drum（5）The distance of outer face exist
（2/7）d-（2/5）Between d.
5. the manufacture method of bi-metal brake drum according to claim 4, it is characterised in that：Drum type structure（1）With braking
Drum（5）The distance of outer face be（1/3）d.
6. the manufacture method of bi-metal brake drum according to claim 1, it is characterised in that：In step 1, punching press drum type knot
Structure（1）When, it is first that mild steel silk-screen blanking is circular, then using concave-convex mold casted die mould（1）Circle is struck out into upper end tool
Have and brake drum（5）The ring surface that the wall of upper end coordinates（9）Drum type structure（1）.
7. the manufacture method of bi-metal brake drum according to claim 6, it is characterised in that：Drum type structure（1）With upper
Opening and under shed, upper shed are located at ring surface（9）Middle part, ring surface（9）With drum type structure（1）Sidepiece be integral type knot
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257073.4A CN106735094B (en) | 2016-12-30 | 2016-12-30 | The manufacturing method of bi-metal brake drum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611257073.4A CN106735094B (en) | 2016-12-30 | 2016-12-30 | The manufacturing method of bi-metal brake drum |
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| CN106735094A true CN106735094A (en) | 2017-05-31 |
| CN106735094B CN106735094B (en) | 2019-01-18 |
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| CN201611257073.4A Active CN106735094B (en) | 2016-12-30 | 2016-12-30 | The manufacturing method of bi-metal brake drum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131232A (en) * | 2017-06-30 | 2017-09-05 | 龙岩市归鸿贸易有限公司 | A kind of brake drum of crack resistence and preparation method thereof |
| CN113007243A (en) * | 2021-02-04 | 2021-06-22 | 张译 | Bimetal brake drum structure, brake drum shell and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57137730A (en) * | 1981-02-17 | 1982-08-25 | Takaoka Kogyo Kk | Manufacture of disc brake rotor |
| CN2784663Y (en) * | 2004-10-13 | 2006-05-31 | 赖建辉 | Embedded brake drum |
| CN201244660Y (en) * | 2008-09-08 | 2009-05-27 | 山东隆基机械股份有限公司 | Sand mold for casting heavy-duty automobile brake hub |
| CN101992267A (en) * | 2009-08-27 | 2011-03-30 | 陕西汽车集团有限责任公司 | Improved casting sand mould structure for automobile brake drum |
| CN104368763A (en) * | 2014-10-17 | 2015-02-25 | 山东浩信机械有限公司 | Casting technology of ring rib brake drum |
| CN105090293A (en) * | 2014-05-17 | 2015-11-25 | 彭松桂 | Brake drum embedded with steel wire mesh and manufacturing method thereof |
-
2016
- 2016-12-30 CN CN201611257073.4A patent/CN106735094B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57137730A (en) * | 1981-02-17 | 1982-08-25 | Takaoka Kogyo Kk | Manufacture of disc brake rotor |
| CN2784663Y (en) * | 2004-10-13 | 2006-05-31 | 赖建辉 | Embedded brake drum |
| CN201244660Y (en) * | 2008-09-08 | 2009-05-27 | 山东隆基机械股份有限公司 | Sand mold for casting heavy-duty automobile brake hub |
| CN101992267A (en) * | 2009-08-27 | 2011-03-30 | 陕西汽车集团有限责任公司 | Improved casting sand mould structure for automobile brake drum |
| CN105090293A (en) * | 2014-05-17 | 2015-11-25 | 彭松桂 | Brake drum embedded with steel wire mesh and manufacturing method thereof |
| CN104368763A (en) * | 2014-10-17 | 2015-02-25 | 山东浩信机械有限公司 | Casting technology of ring rib brake drum |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131232A (en) * | 2017-06-30 | 2017-09-05 | 龙岩市归鸿贸易有限公司 | A kind of brake drum of crack resistence and preparation method thereof |
| CN107131232B (en) * | 2017-06-30 | 2023-07-07 | 山东宏马工程机械有限公司 | Anti-cracking brake drum and manufacturing method thereof |
| CN113007243A (en) * | 2021-02-04 | 2021-06-22 | 张译 | Bimetal brake drum structure, brake drum shell and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106735094B (en) | 2019-01-18 |
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Effective date of registration: 20181205 Address after: 364104 Houkuo 11, Zhenxi Liancun, Fushi City, Yongding County, Fujian Province Applicant after: Lu Senjia Address before: 364000 Longyan High-tech Industrial Development Zone, Longyan City, Fujian Province Applicant before: Longyan Shengfeng Machinery Manufacturing Co., Ltd. |
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