CN106736301B - A kind of forming method of press-fitting type bimetallic composite brake drum - Google Patents
A kind of forming method of press-fitting type bimetallic composite brake drum Download PDFInfo
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- CN106736301B CN106736301B CN201710018423.XA CN201710018423A CN106736301B CN 106736301 B CN106736301 B CN 106736301B CN 201710018423 A CN201710018423 A CN 201710018423A CN 106736301 B CN106736301 B CN 106736301B
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- cast iron
- brake drum
- iron pipe
- mild steel
- press
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A kind of forming method of press-fitting type bimetallic composite brake drum, it is related to brake drum forming method technical field, a mild steel steel pipe is made by a brake drum housing using the method that cold-drawn stretches first, a cast iron pipe is made with the method for centrifugal casting, cast iron pipe is sized to, and make the outer diameter of cast iron pipe greater than the internal diameter of mild steel shell, and several grooves are processed in cast iron pipe outer wall, then epoxy resin adhesive is coated in cast iron pipe outer wall and in groove, and cast iron pipe is pressed into brake drum housing made of mild steel with hydraulic press, form the bimetallic composite brake drum of two kinds of materials of composite low-carbon steel and cast iron, brake drum can install use after placing 24 hours.The moulding process of bimetallic composite brake drum of the present invention is simple, high-efficient, and it is firm that two kinds of materials of brake drum combine, product safety, durable.
Description
Technical field
The present invention relates to the forming method technical fields of brake drum, and in particular to a kind of molding of bimetallic composite brake drum
Method.
Background technique
Flourishing for transportation is filled with vigor for auto industry, and the development of auto industry is that auto parts and components are special
It is not that the development of foundry enterprise provides huge development space.Brake drum is consumed as the key wear in brake system of car
Part, since its is compact-sized, the advantages that reliable performance, braking power is big, market demand is huge.
The brake drum material used currently on the market is mainly divided to two classes, and one kind is cast iron (for large and medium-sized vehicle), a kind of
It is aluminum matrix composite (being mainly used for small vehicle).It is essentially consisted in using cast iron as the reason of most of automobile-used brake drum material
Its preferable casting character is easy to machining, and wearability and thermal conductivity are all preferable and cheap.But it also has one
Fixed disadvantage, mainly thermal fatigue resistance are poor, are easy fatigue and then are broken to scrap；Weight is bigger than normal, reduces to the greatest extent now
Vehicle weight and in terms of saving fuel oil, it is outdated, it is necessary to improve.
Has there are several bi-metal brake drum new technologies in the country at present: being placed in a steel band in normal danger when 1, casting
Its toughness is improved, this method quality conformance is difficult to control, and the raising of toughness is also limited, fail its safety of radical change
Property.2, outer layer manufactures a shell with low carbon steel plate, is then directly poured into manufactured shell with the method for centrifugal casting,
This method solves the problems, such as toughness and wearability very well, has extensive utilization in foreign countries, the disadvantage is that quality control difficulties,
Production efficiency is low, at high cost.3, outer layer manufactures a shell with low carbon steel plate, and cylinder iron piecemeal makes and uses riveting or spiral shell internal layer
Tethering the method connect makes the combination of inner and outside together, this technology also very good solution safety and wearability problem, but it is given birth to
Production. art is complicated, production efficiency is lower, investment is big, cost is higher and pts wt increases.The shortcomings that due to the above technology, cause
These technologies commercially available at home could not promote the use.
Summary of the invention
The object of the present invention is to provide a kind of moulding process of the brake drum of two kinds of metal materials of composite low-carbon steel and cast iron,
Simplify technique, reduces cost, it is ensured that requirement of the obtained composite brake drum to high-wearing feature and high security.
To achieve the above object, the technical scheme is that a kind of molding side of press-fitting type bimetallic composite brake drum
Method includes the following steps:
(1), the mild steel steel pipe for being 7mm by wall thickness with the method that cold-drawn stretches, is made a wall thickness and is 4mm, is highly
330mm, largest outer diameter is the mild steel shell of 483mm, as brake drum housing；
(2), molten iron is melted, and keeps the temperature molten iron at 1280 ~ 1290 DEG C, cast molten iron using horizontal centrifugal casting machine
Cause a cast iron pipe；Wherein, the revolving speed of horizontal centrifugal casting machine is 600 ~ 750r/min in casting process；
(3), the cast iron pipe that casting is completed is processed into internal diameter is 460mm, with a thickness of 8mm, a height of 300mm, makes cast iron pipe
Outer diameter be greater than the internal diameter of mild steel shell, and several grooves are processed on the outer wall of cast iron pipe；
(4), mild steel shell is fixed on a hydraulic press, epoxy resin is coated on the outer wall of cast iron pipe and in recessed grain
Bonding agent, and cast iron pipe is pressed into mild steel shell with hydraulic press；
(5), after cast iron pipe is pressed completely into, cast iron pipe and mild steel shell are combined as a whole, and to form the bimetallic multiple
Brake drum is closed, after brake drum is removed and places 24 hours, can install use.
Further, in step (2), the mass percentage composition of the molten iron are as follows: C:3.48 ~ 3.55%, Si:1.63%,
Mn:0.67 ~ 0.72%, Cr:0.46%, P:0.4 ~ 0.7%, S are no more than 0.02%, surplus Fe.
In step (3), a groove is processed at interval of 20mm along cast iron pipe length direction on the outer wall of the cast iron pipe,
Each groove is annularly arranged.
The technical solution adopted by the present invention has the following advantages that and effect:
Using press-fit forming method, by the brake drum interliner of the brake drum housing of low-carbon steel material and cast iron quality
Together, bimetallic composite brake drum of the invention is formd, entire moulding process is simple, high-efficient and of the invention double gold
Belong to composite brake drum the toughness combination of the wear-resisting property of cast iron and steel alloy is got up, it is product safety, durable.
The method used simultaneously using interference fit and bonding agent, makes mild steel shell and cast iron pipe liner be integrated as one
Body, it is firm that faying face combines.
Process the groove of suitable shape on the outer wall of cast iron pipe, groove can increase connecing for binder and shell steel inner wall
Contacting surface product, plays better anchoring effect.
Entire design, the old brake drum of new brake convexity-ratio (whole cast irons) weight saving at least 35% of the invention, service life
It is enhanced about more than once and never broken.In addition, simple production process of the present invention, low in cost, popularization and application foreground is wide.
Detailed description of the invention
Fig. 1 is a certain state diagram that cast iron pipe is pressed into during mild steel shell by the present invention；
Fig. 2 is the state diagram that cast iron pipe is completely forced into the two combination after mild steel shell by the present invention；
In the figure, it is marked as 1, mild steel shell, 2, cast iron pipe, 3, recessed grain.
Specific embodiment
A kind of forming method of press-fitting type bimetallic composite brake drum, includes the following steps:
(1), the mild steel steel pipe for being 7mm by wall thickness with the method that cold-drawn stretches, is made a wall thickness and is 4mm, is highly
330mm, largest outer diameter is the mild steel shell of 483mm, as brake drum housing；
(2), molten iron is melted, and keeps the temperature molten iron at 1280 ~ 1290 DEG C, cast molten iron using horizontal centrifugal casting machine
Cause a cast iron pipe；Wherein, the revolving speed of horizontal centrifugal casting machine is 600 ~ 750r/min in casting process；
(3), the cast iron pipe that casting is completed is processed into internal diameter is 460mm, with a thickness of 8mm, a height of 300mm, makes cast iron pipe
Outer diameter be greater than the internal diameter of mild steel shell, and several grooves are processed on the outer wall of cast iron pipe；
(4), mild steel shell is fixed on a hydraulic press, epoxy resin is coated on the outer wall of cast iron pipe and in recessed grain
Bonding agent, and cast iron pipe is pressed into mild steel shell with hydraulic press；
(5), after cast iron pipe is pressed completely into, cast iron pipe and mild steel shell are combined as a whole, and to form the bimetallic multiple
Brake drum is closed, after brake drum is removed and places 24 hours, can install use.
In step (2), the mass percentage composition of the molten iron are as follows: C:3.48 ~ 3.55%, Si:1.63%, Mn:0.67 ~
0.72%, Cr:0.46%, P:0.4 ~ 0.7%, S are no more than 0.02%, surplus Fe.
Step (2) is in the casting process of cast iron pipe, and after molten iron solidifies completely, first chance is as cold as 500 DEG C, then cast iron
Pipe releases cylinder body, air-cooled, carries out step (3) operation later.The diameter of horizontal centrifugal casting machine used is 500mm.
In step (3), processed along cast iron length of tube (namely height) direction at interval of 20mm on the outer wall of the cast iron pipe
A groove out, each groove are annularly arranged.The specification of groove is width 10mm, groove depth 1mm.
In step (1), mild steel uses 08 steel or 10 steel.
Claims (3)
1. a kind of forming method of press-fitting type bimetallic composite brake drum, characterized by the following steps:
(1), the mild steel steel pipe for being 7mm by wall thickness with the method that cold-drawn stretches, is made a wall thickness and is 4mm, is highly
330mm, largest outer diameter is the mild steel shell of 483mm, as brake drum housing；
(2), molten iron is melted, and keeps the temperature molten iron at 1280 ~ 1290 DEG C, be cast as molten iron using horizontal centrifugal casting machine
One cast iron pipe；Wherein, the revolving speed of horizontal centrifugal casting machine is 600 ~ 750r/min in casting process；
(3), the cast iron pipe that casting is completed is processed into internal diameter is 460mm, with a thickness of 8mm, a height of 300mm, makes the outer of cast iron pipe
Diameter is greater than the internal diameter of mild steel shell, and several grooves are processed on the outer wall of cast iron pipe；
(4), mild steel shell is fixed on a hydraulic press, adhering with epoxy resin is coated on the outer wall of cast iron pipe and in recessed grain
Agent, and cast iron pipe is pressed into mild steel shell with hydraulic press；
(5), after cast iron pipe is pressed completely into, cast iron pipe and mild steel shell are combined as a whole to form the compound system of the bimetallic
Dynamic drum, after brake drum is removed and places 24 hours, can install use.
2. a kind of forming method of press-fitting type bimetallic composite brake drum as described in claim 1, it is characterised in that: step
(2) in, the mass percentage composition of the molten iron are as follows: C:3.48 ~ 3.55%, Si:1.63%, Mn:0.67 ~ 0.72%, Cr:
0.46%, P:0.4 ~ 0.7%, S are no more than 0.02%, surplus Fe.
3. a kind of forming method of press-fitting type bimetallic composite brake drum as described in claim 1, it is characterised in that: step
(3) in, a groove is processed at interval of 20mm along cast iron pipe length direction on the outer wall of the cast iron pipe, each groove is in
Ring-type setting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710018423.XA CN106736301B (en) | 2017-01-11 | 2017-01-11 | A kind of forming method of press-fitting type bimetallic composite brake drum |
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| CN201710018423.XA CN106736301B (en) | 2017-01-11 | 2017-01-11 | A kind of forming method of press-fitting type bimetallic composite brake drum |
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| CN106736301A CN106736301A (en) | 2017-05-31 |
| CN106736301B true CN106736301B (en) | 2018-12-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035795A (en) * | 2017-06-20 | 2017-08-11 | 彭松桂 | High-performance truck bi-metal brake drum |
| CN111687394B (en) * | 2020-05-19 | 2021-07-30 | 长沙圆丹动力科技有限公司 | Preparation method of corrosion-resistant ductile malleable cast iron material |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6530458B1 (en) * | 1996-02-28 | 2003-03-11 | Rau, Iii Charles B. | Lightweight reinforced brake drum and method for making lightweight reinforced brake drum |
| CN2871966Y (en) * | 2006-01-23 | 2007-02-21 | 谭富春 | Double-layer metal structural braking hub of automobile |
| CN201166067Y (en) * | 2008-01-25 | 2008-12-17 | 王永忠 | Novel brake hub |
| CN201215148Y (en) * | 2008-05-28 | 2009-04-01 | 胡青迪 | Automobile dual metal brake hub |
| CN102322490A (en) * | 2011-06-20 | 2012-01-18 | 嘉兴四通车轮股份有限公司 | Manufacturing method of brake drum of duplex metal composite automobile |
| CN202176641U (en) * | 2011-07-08 | 2012-03-28 | 福建畅丰车桥制造有限公司 | Bimetal layer brake drum with groove on inner ring |
| CN102601337A (en) * | 2012-03-09 | 2012-07-25 | 河南科技大学 | Shaping method of bimetallic composite-material brake drum |
-
2017
- 2017-01-11 CN CN201710018423.XA patent/CN106736301B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6530458B1 (en) * | 1996-02-28 | 2003-03-11 | Rau, Iii Charles B. | Lightweight reinforced brake drum and method for making lightweight reinforced brake drum |
| CN2871966Y (en) * | 2006-01-23 | 2007-02-21 | 谭富春 | Double-layer metal structural braking hub of automobile |
| CN201166067Y (en) * | 2008-01-25 | 2008-12-17 | 王永忠 | Novel brake hub |
| CN201215148Y (en) * | 2008-05-28 | 2009-04-01 | 胡青迪 | Automobile dual metal brake hub |
| CN102322490A (en) * | 2011-06-20 | 2012-01-18 | 嘉兴四通车轮股份有限公司 | Manufacturing method of brake drum of duplex metal composite automobile |
| CN202176641U (en) * | 2011-07-08 | 2012-03-28 | 福建畅丰车桥制造有限公司 | Bimetal layer brake drum with groove on inner ring |
| CN102601337A (en) * | 2012-03-09 | 2012-07-25 | 河南科技大学 | Shaping method of bimetallic composite-material brake drum |
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Inventor after: Wang Wenyan Inventor after: Huang Yabo Inventor after: Liu Jiyao Inventor after: Lu Gao Inventor after: Guo Leiming Inventor after: Xie Jingpei Inventor after: Li Jiwen Inventor after: Wang Aiqin Inventor after: Li Luoli Inventor before: Huang Yabo Inventor before: Wang Wenyan Inventor before: Liu Jiyao Inventor before: Lu Gao Inventor before: Guo Leiming Inventor before: Xie Jingpei Inventor before: Li Jiwen Inventor before: Wang Aiqin Inventor before: Li Luoli |
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Application publication date: 20170531 Assignee: Zhumadian forever Machinery Manufacturing Co., Ltd. Assignor: Henan University of Science and Technology Contract record no.: X2019980000314 Denomination of invention: Forming method of press-fit double-metal compound brake drum Granted publication date: 20181204 License type: Common License Record date: 20191029 |