CN111503185A - Aluminum-iron composite brake disc and manufacturing method thereof - Google Patents
Aluminum-iron composite brake disc and manufacturing method thereof Download PDFInfo
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- CN111503185A CN111503185A CN202010417486.4A CN202010417486A CN111503185A CN 111503185 A CN111503185 A CN 111503185A CN 202010417486 A CN202010417486 A CN 202010417486A CN 111503185 A CN111503185 A CN 111503185A
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- Prior art keywords
- friction disc
- aluminum
- brake
- disc
- casting
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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
- F16D65/12—Discs; Drums for disc brakes
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- 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
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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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
- B23P15/18—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass brake shoes
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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
- F16D65/12—Discs; Drums for disc brakes
- F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
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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
- F16D65/12—Discs; Drums for disc brakes
- F16D65/128—Discs; Drums for disc brakes characterised by means for cooling
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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
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/847—Features relating to cooling for disc brakes with open cooling system, e.g. cooled by air
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to the field of automobile braking, in particular to an aluminum-iron composite brake disc and a manufacturing method thereof, wherein the aluminum-iron composite brake disc comprises a friction disc, an aluminum alloy brake pot fixedly connected with an inner ring of the friction disc, and a fixing part for connecting the friction disc and the brake pot through casting; the friction disc is of a double-layer structure, the upper layer and the lower layer of the friction disc are fixedly connected through reinforcing ribs, and the distance between the inner rings of the reinforcing ribs is smaller than that between the outer rings of the reinforcing ribs. The friction disc manufactured by the invention has light weight and good heat dissipation.
Description
Technical Field
The invention relates to the field of automobile braking, in particular to an aluminum-iron composite brake disc and a manufacturing method thereof.
Background
At present, the automobile friction disc is mostly made of cast iron, represented by gray cast iron HT250, and is produced by a casting process. An excellent friction disc should be lightweight, have sufficient strength, excellent wear resistance, sufficient high temperature performance, excellent heat dissipation and fatigue resistance. Because of the limitation of materials and casting technology, the cast iron friction disc brake drum has heavier weight and is positioned below the spring, thereby increasing the oil consumption of the automobile and influencing the acceleration performance. The heat conductivity coefficient of the cast iron material is only about 58W/(m.k), during high-speed braking or continuous braking, a large amount of heat is generated by short-time friction, the heat cannot be dissipated in time due to the low heat conductivity, heat fading of the friction disc is caused, and the braking effect and the service life are influenced.
Disclosure of Invention
The invention aims to provide an aluminum-iron composite brake disc and a manufacturing method thereof, and provides the aluminum-iron composite brake disc which is good in heat dissipation and light in weight.
In order to achieve the purpose, the invention provides the following scheme:
an aluminum-iron composite brake disc comprises a friction disc, an aluminum alloy brake pot fixedly connected with an inner ring of the friction disc, and a fixing part for connecting the friction disc and the brake pot through casting; the friction disc is of a double-layer structure, the upper layer and the lower layer of the friction disc are fixedly connected through reinforcing ribs, and the distance between the inner rings of the reinforcing ribs is smaller than that between the outer rings of the reinforcing ribs.
Preferably, the reinforcing rib is helical.
Preferably, the fixing part is a protrusion arranged on the circumferential side wall of the inner ring of the friction disc, and the brake pot is fixedly connected with the protrusion through casting.
Preferably, the fixing part is a pin, an annular bulge is arranged at one end of the pin, the pin is fixedly connected with the side wall of the inner ring of the friction disc, and the brake pot is fixedly connected with the annular bulge of the pin through casting.
Preferably, the fixing part is the reinforcing rib with the inner ring extended, and the brake pot is fixedly connected with the reinforcing rib through casting.
A manufacturing method of an aluminum-iron composite brake disc comprises the following steps:
cleaning cutting fluid and foreign matters remained at the joint part of the inner ring of the friction disc by using a cleaning agent and a high-pressure cleaning machine, and removing burrs for later use;
step two, placing the friction disc in the step one into a preheating furnace to be heated to 400-;
step three, placing the friction disc in the step two into a pre-prepared mould, heating the aluminum alloy melt to 680-710 ℃, pouring the aluminum alloy melt into the mould to form the brake pot, and combining the brake pot and the friction disc after pouring to obtain a composite blank;
step four, the composite blank in the step three is placed into a cooling pool for cooling, the temperature of cooling water is 40-80 ℃, and the cooling time is 60-120 s;
putting the composite blank cooled in the fourth step into a sawing machine, and removing a casting head of a casting;
step six, detecting the quality of the composite blank in the step five through X-ray;
step seven, placing the qualified composite blank piece into a heat treatment furnace for heat treatment of the aluminum alloy;
and step eight, carrying out numerical control machining on the composite blank piece in the step seven to obtain a finished product of the aluminum-iron composite brake disc.
The invention has the following technical effects:
1. compared with a cast iron friction disc, the weight of a single aluminum-iron composite brake disc with the new structure is reduced, so that the emission of CO, HC and NOx of automobile exhaust is reduced; the fuel efficiency and the acceleration performance are improved, the braking distance of the automobile is reduced due to the reduction of the weight of the whole automobile, and the steering performance is improved.
2. The heat conductivity coefficient of the aluminum alloy reaches 121-. The durability of the chassis is improved.
3. The middle of the brake disc is provided with the reinforcing ribs, the distance between the inner rings of the reinforcing ribs is smaller than that between the outer rings of the reinforcing ribs, the friction disc rotates along with the wheel in the driving process of a vehicle, pressure difference can be formed between the inner rings and the outer rings of the reinforcing ribs, the pressure of the outer rings is smaller than that of the inner rings, and air can pass through the cavities formed by the reinforcing ribs to further enhance the heat dissipation of the friction.
4. The aluminum alloy brake pot is combined with the cast iron friction disc through aluminum alloy casting, the tensile strength of the aluminum alloy brake pot is larger than or equal to 180MPa, the elongation is larger than or equal to 3%, the thermal expansion coefficient of the aluminum alloy is about 2 times that of gray cast iron, and the temperature change is about 1.7 times, so that strong binding force is generated at the combined part due to the difference of the shrinkage of the two materials.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of the internal construction of a friction disc of the present invention;
FIG. 3 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a third embodiment of the present invention.
Wherein, 1 is a friction disc, 2 is a brake pot, and 3 is a connecting piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
referring to fig. 1, the embodiment provides an aluminum-iron composite brake disc, which includes a friction disc 1, an aluminum alloy brake pot 2 fixedly connected to an inner ring of the friction disc 1, and a fixing portion 3 connecting the friction disc 1 and the brake pot 2 by casting; the friction disc 1 is of a double-layer structure, the upper layer and the lower layer of the friction disc 1 are fixedly connected through the reinforcing ribs 4, and the distance between the inner rings of the reinforcing ribs 4 is smaller than that between the outer rings. The overall weight of the brake disc is reduced by the aluminum-iron composite structure, and the aluminum alloy brake pot 2 is arranged in the brake disc by utilizing the principle that the heat conductivity coefficient of aluminum alloy is higher than that of iron, so that the heat dissipation of the brake disc can be effectively enhanced; and then through the shape structure arrangement of the reinforcing ribs 4, in the running process of a vehicle, the friction disc 1 rotates along with the wheel, a pressure difference can be formed between the inner ring and the outer ring of the reinforcing ribs 4, the pressure of the outer ring is smaller than that of the inner ring, and air can pass through the cavity formed by the reinforcing ribs 4, so that the heat dissipation of the friction disc 1 is enhanced.
In a further optimized scheme, the reinforcing ribs 4 are spiral.
In a further optimized scheme, the fixing part 3 is a protrusion 301 arranged on the circumferential side wall of the inner ring of the friction disc 1, and the brake pot 2 is fixedly connected with the protrusion 301 through casting.
A manufacturing method of an aluminum-iron composite brake disc comprises the following steps:
cleaning cutting fluid and foreign matters remained at the joint part of the inner ring of the friction disc 1 by using a cleaning agent and a high-pressure cleaning machine, and removing burrs for later use;
step two, putting the friction disc 1 in the step one into a preheating furnace to be heated to 400 ℃, and preserving heat for later use; when the preheating temperature of the friction disc 1 is low, cracks are easy to appear at the aluminum-iron matching part, so that the internal quality of the matching part is poor, and the overall strength is influenced;
step three, placing the friction disc 1 in the step two into a pre-prepared mould, heating the aluminum alloy melt to 680 ℃, pouring the aluminum alloy melt into the mould to form a brake pot 2, and combining the brake pot 2 and the friction disc 1 after pouring to obtain a composite blank; the casting temperature is too low, the fluidity of the alloy liquid is not strong, the defects of material shortage, cracks, air holes and the like are easily generated, the thermal expansion coefficient of the aluminum alloy is about 2 times that of the gray cast iron, and the temperature change is about 1.7 times, so that strong binding force is generated at the binding part due to the difference of the shrinkage of the two materials;
step four, placing the composite blank in the step three into a cooling pool for cooling, wherein the temperature of cooling water is 80 ℃, and the cooling time is 60 s;
putting the composite blank cooled in the fourth step into a sawing machine, and removing a casting head of a casting;
step six, detecting the quality of the composite blank in the step five through X-ray;
step seven, placing the qualified composite blank piece into a heat treatment furnace for heat treatment of the aluminum alloy;
and step eight, carrying out numerical control machining on the composite blank piece in the step seven to obtain a finished product of the aluminum-iron composite brake disc.
Example two
Referring to fig. 2, in the embodiment, the fixing portion 3 is a pin 302, one end of the pin 302 is provided with an annular protrusion, the pin 302 is fixedly connected with a side wall of an inner ring of the friction disc 1, and the brake pot 2 is fixedly connected with the annular protrusion of the pin 302 by casting.
A manufacturing method of an aluminum-iron composite brake disc comprises the following steps:
cleaning cutting fluid and foreign matters remained at the joint part of the inner ring of the friction disc 1 by using a cleaning agent and a high-pressure cleaning machine, and removing burrs for later use;
step two, putting the friction disc 1 in the step one into a preheating furnace to be heated to 500 ℃, and preserving heat for later use;
step three, placing the friction disc 1 in the step two into a pre-prepared mould, heating the aluminum alloy melt to 700 ℃, pouring the aluminum alloy melt into the mould to form a brake pot 2, and combining the brake pot 2 and the friction disc 1 after pouring to obtain a composite blank;
step four, placing the composite blank in the step three into a cooling pool for cooling, wherein the temperature of cooling water is 60 ℃, and the cooling time is 90 s;
putting the composite blank cooled in the fourth step into a sawing machine, and removing a casting head of a casting;
step six, detecting the quality of the composite blank in the step five through X-ray;
step seven, placing the qualified composite blank piece into a heat treatment furnace for heat treatment of the aluminum alloy;
and step eight, carrying out numerical control machining on the composite blank piece in the step seven to obtain a finished product of the aluminum-iron composite brake disc.
EXAMPLE III
Referring to fig. 2, in the embodiment, the fixing portion 3 is a reinforcing rib 4 with an extended inner ring, and the brake pot 2 is fixedly connected with the reinforcing rib 4 through casting.
A manufacturing method of an aluminum-iron composite brake disc is characterized by comprising the following steps: the method comprises the following steps:
cleaning cutting fluid and foreign matters remained at the joint part of the inner ring of the friction disc 1 by using a cleaning agent and a high-pressure cleaning machine, and removing burrs for later use;
and step two, putting the friction disc 1 in the step one into a preheating furnace to be heated to 600 ℃, and preserving heat for later use. When the preheating temperature of the friction disc 1 is high, shrinkage porosity is easy to occur at the aluminum-iron matching part, so that the internal quality of the matching part is poor, and the overall strength is influenced;
step three, placing the friction disc 1 in the step two into a pre-prepared mould, heating the aluminum alloy melt to 710 ℃, pouring the aluminum alloy melt into the mould to form a brake pot 2, and combining the brake pot 2 and the friction disc 1 after pouring to obtain a composite blank; the casting temperature is too high, the crystalline structure becomes coarse after the aluminum alloy is formed, pinholes and shrinkage porosity are easy to generate, the temperature is too high, the cooling time is prolonged, and the production efficiency is influenced;
step four, placing the composite blank in the step three into a cooling pool for cooling, wherein the temperature of cooling water is 40 ℃, and the cooling time is 120 s;
putting the composite blank cooled in the fourth step into a sawing machine, and removing a casting head of a casting;
step six, detecting the quality of the composite blank in the step five through X-ray;
step seven, placing the qualified composite blank piece into a heat treatment furnace for heat treatment of the aluminum alloy;
and step eight, carrying out numerical control machining on the composite blank piece in the step seven to obtain a finished product of the aluminum-iron composite brake disc.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (6)
1. The utility model provides an aluminium iron composite brake disc which characterized in that: the brake comprises a friction disc (1), an aluminum alloy brake pot (2) fixedly connected with an inner ring of the friction disc (1), and a fixing part (3) for connecting the friction disc (1) and the brake pot (2) through casting; the friction disc (1) is of a double-layer structure, the upper layer and the lower layer of the friction disc (1) are fixedly connected through reinforcing ribs (4), and the distance between the inner rings of the reinforcing ribs (4) is smaller than that between the outer rings.
2. The aluminum-iron composite brake disc as claimed in claim 1, wherein: the reinforcing ribs (4) are spiral.
3. The aluminum-iron composite brake disc as claimed in claim 1, wherein: the fixing part (3) is a bulge (301) arranged on the circumferential side wall of the inner ring of the friction disc (1), and the brake pot (2) is fixedly connected with the bulge (301) through casting.
4. The aluminum-iron composite brake disc as claimed in claim 1, wherein: the fixing part (3) is a pin (302), an annular bulge is arranged at one end of the pin (302), the pin (302) is fixedly connected with the side wall of the inner ring of the friction disc (1), and the brake pot (2) is fixedly connected with the annular bulge of the pin (302) through casting.
5. The aluminum-iron composite brake disc as claimed in claim 1, wherein: the fixing part (3) is the reinforcing rib (4) after the inner ring is extended, and the brake pot (2) is fixedly connected with the reinforcing rib (4) through casting.
6. The method for manufacturing the aluminum-iron composite brake disc of any one of 1-5 is characterized by comprising the following steps of: the method comprises the following steps:
cleaning residual cutting fluid and foreign matters at the joint part of the inner ring of the friction disc (1) by using a cleaning agent and a high-pressure cleaning machine, and removing burrs for later use;
step two, placing the friction disc (1) in the step one into a preheating furnace to be heated to 400-600 ℃, and preserving heat for later use;
step three, placing the friction disc (1) in the step two into a pre-prepared mould, heating the aluminum alloy melt to 680-710 ℃, pouring the aluminum alloy melt into the mould to form the brake pot (2), and combining the brake pot (2) and the friction disc (1) after pouring to obtain a composite blank;
step four, the composite blank in the step three is placed into a cooling pool for cooling, the temperature of cooling water is 40-80 ℃, and the cooling time is 60-120 s;
putting the composite blank cooled in the fourth step into a sawing machine, and removing a casting head of a casting;
step six, detecting the quality of the composite blank in the step five through X-ray;
step seven, placing the qualified composite blank piece into a heat treatment furnace for heat treatment of the aluminum alloy;
and step eight, carrying out numerical control machining on the composite blank piece in the step seven to obtain a finished product of the aluminum-iron composite brake disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010417486.4A CN111503185A (en) | 2020-05-18 | 2020-05-18 | Aluminum-iron composite brake disc and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010417486.4A CN111503185A (en) | 2020-05-18 | 2020-05-18 | Aluminum-iron composite brake disc and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN111503185A true CN111503185A (en) | 2020-08-07 |
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| CN202010417486.4A Pending CN111503185A (en) | 2020-05-18 | 2020-05-18 | Aluminum-iron composite brake disc and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833784A (en) * | 2021-10-26 | 2021-12-24 | 贵州省紫安新材料科技有限公司 | Carbon-ceramic aluminum alloy brake disc and preparation method thereof |
| CN114247864A (en) * | 2022-03-01 | 2022-03-29 | 山西汤荣机械制造股份有限公司 | High-strength high-heat-conductivity composite brake drum sand mold shell, shell mold and shell product |
| CN115163704A (en) * | 2022-07-08 | 2022-10-11 | 烟台亿众智能科技有限公司 | Aluminum magnesium alloy die casting for automobile parts and die casting method thereof |
-
2020
- 2020-05-18 CN CN202010417486.4A patent/CN111503185A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833784A (en) * | 2021-10-26 | 2021-12-24 | 贵州省紫安新材料科技有限公司 | Carbon-ceramic aluminum alloy brake disc and preparation method thereof |
| CN114247864A (en) * | 2022-03-01 | 2022-03-29 | 山西汤荣机械制造股份有限公司 | High-strength high-heat-conductivity composite brake drum sand mold shell, shell mold and shell product |
| CN114247864B (en) * | 2022-03-01 | 2022-05-20 | 山西汤荣机械制造股份有限公司 | High-strength high-heat-conductivity composite brake drum sand mold shell, shell mold and shell product |
| CN115163704A (en) * | 2022-07-08 | 2022-10-11 | 烟台亿众智能科技有限公司 | Aluminum magnesium alloy die casting for automobile parts and die casting method thereof |
| CN115163704B (en) * | 2022-07-08 | 2023-12-22 | 烟台亿众智能科技有限公司 | Aluminum magnesium alloy die casting for automobile parts and die casting method thereof |
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