CN112524178A - Composite brake drum and preparation method thereof - Google Patents
Composite brake drum and preparation method thereof Download PDFInfo
- Publication number
- CN112524178A CN112524178A CN202011505680.4A CN202011505680A CN112524178A CN 112524178 A CN112524178 A CN 112524178A CN 202011505680 A CN202011505680 A CN 202011505680A CN 112524178 A CN112524178 A CN 112524178A
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- China
- Prior art keywords
- brake drum
- composite
- composite brake
- steel plate
- shell
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Classifications
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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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- 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
Abstract
The utility model provides a composite brake drum, includes that shell base member and inlayer reinforce the body, and the inlayer is reinforceed the body and is located on the inner wall of shell base member along circumference, and the shell base member adopts the alloy steel sheet material, and the inlayer is reinforceed the body and is the vermicular graphite cast iron composite bed. The composite brake drum and the preparation method thereof change the structure of the existing brake drum, adopt a shell matrix and an inner layer reinforcement body for composite reinforcement, and the inner layer reinforcement body adopts a vermicular cast iron composite layer, so that the composite brake drum has specific graphite structure and performance and has an expansion coefficient close to that of a steel flange shell, thereby having better fatigue resistance.
Description
Technical Field
The invention relates to the technical field of brake drums, and particularly discloses a composite brake drum and a preparation method thereof.
Background
The brake drum is the primary braking element in the axle braking system. When the automobile brakes, the brake force is generated through the friction action of the brake pad and the inner wall of the brake drum. The friction action of brake drum inner wall and brake block produces braking effect, and the friction in-process can produce the heat, and at the friction in-process and after stopping rubbing, cold and hot alternate's the condition also can appear in the different positions of brake drum, and this just needs the brake drum to have good wearability, heat conductivity and thermal fatigue resistance.
According to statistical data, brake drum cracking accounts for more than 80% of failure conditions, and cracking is mainly caused by thermal fatigue cracks. The existing brake drum is generally cast by gray cast iron, but the gray cast iron has poor thermal fatigue resistance, so that the brake drum is easy to crack, a brake system breaks down, and the driving safety of a vehicle is directly endangered.
Chinese utility model "a vanadium titanium vermicular graphite cast iron automobile brake drum" (publication number: CN207848255U) discloses a vanadium titanium vermicular graphite cast iron automobile brake drum, which comprises a steel plate drum shell and a vanadium titanium vermicular graphite cast iron drum ring, a wheel flange is tightly welded in front of the steel plate drum shell, a dust cover is arranged in front of the wheel flange, a buckle plate is arranged on the right side of the wheel flange, two ventilation nets are tightly attached to the upper and lower ends in front of the steel plate drum shell, a brake shoe is arranged between the ventilation nets, an observation groove is arranged in front of the brake shoe, brake caliper pins are fixedly connected to the upper and lower sides of the brake shoe, a brake is tightly connected to the right side of the steel plate drum shell, a vanadium titanium vermicular graphite cast iron drum ring is arranged in the steel plate drum shell, the vanadium titanium vermicular graphite cast iron automobile brake drum is provided with an observation groove, the depth of the observation groove is 5cm, the depth of the observation groove is equal to the thickness of the brake, therefore, the problem of whether the parts need to be replaced can be judged. The utility model discloses a focus is the setting of observing the recess, can audio-visual observation the inside loss condition of equipment through observing the recess to this problem that can judge whether need the renewal part.
The invention discloses a high heat dissipation type brake drum (publication number: CN105351403A), which comprises an installation part, a transition connection part and a braking part of the brake drum, wherein the braking part is provided with a groove, a tightening sleeve is fixedly installed on the groove, a plurality of brake drum through holes are arranged in the groove, the tightening sleeve comprises a plurality of tightening rings which are separated by a specified distance, a plurality of tightening sleeve through holes are arranged in the tightening sleeve, the cross section of each tightening ring is rectangular or approximately rectangular, two side surfaces of each tightening ring are respectively provided with an inner arc-shaped groove, a plurality of tightening ring transverse through holes are arranged at the opposite positions of the two inner arc-shaped grooves, the tightening ring transverse through holes are distributed at equal intervals along the circumferential direction of the tightening ring, and a tightening ring vertical through hole is arranged below each tightening ring transverse through hole. The invention mainly solves the problem of heat dissipation after the temperature of the inner wall of the brake drum is sharply increased, improves the use safety and the service life of the brake drum by using the clamping sleeve, does not relate to the composite brake drum in the invention, and does not mention the problem of delamination or cracking of the composite brake drum.
Disclosure of Invention
The invention provides a composite brake drum and a preparation method thereof, aiming at overcoming the defects of the prior art, so that the fatigue resistance of the brake drum is improved, and the service life is prolonged.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a composite brake drum, includes that shell base member and inlayer reinforce the body, and the inlayer is reinforceed the body and is located on the inner wall of shell base member along circumference, and the shell base member adopts the alloy steel sheet material, and the inlayer is reinforceed the body and is the vermicular graphite cast iron composite bed.
The vermicular graphite cast iron composite layer is made of vermicular graphite alloy cast iron and spherical graphite alloy cast iron.
The shell base body is of a cylindrical structure, and a plurality of threaded holes are formed in the front end face of the shell base body.
A method of manufacturing a composite brake drum comprising the steps of:
step 3, preheating treatment: cleaning the formed steel film shell and carrying out preheating treatment at the preheating temperature of 80-150 ℃;
step 4, pouring at 1460-1500 ℃, wherein molten iron is contacted with the steel film treated in the step 3 to melt the surface layer of the steel plate, and the thickness of the molten layer is 1-3 mm;
step 5, opening the box, and performing shot blasting polishing on the obtained casting;
and 6, machining to obtain a finished product.
The steel plate in the step 1 is A35 high-quality carbon structural steel.
The molten iron in the step 2 is RuT350 molten iron.
The invention has the beneficial effects that:
the composite brake drum and the preparation method thereof change the structure of the existing brake drum, adopt a shell matrix and an inner layer reinforcement body for composite reinforcement, and the inner layer reinforcement body adopts a vermicular cast iron composite layer, so that the composite brake drum has specific graphite structure and performance and has an expansion coefficient close to that of a steel flange shell, thereby having better fatigue resistance.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
As shown in fig. 1 and 2, a composite brake drum includes a housing base 1 and an inner layer reinforcement body 2, the inner layer reinforcement body 2 is fixedly disposed on an inner wall of the housing base 1 along a circumferential direction, the housing base 1 is made of an alloy steel plate to form a steel flange housing, the inner layer reinforcement body 2 is a vermicular graphite cast iron composite layer, and in this embodiment, the vermicular graphite cast iron composite layer is made of vermicular graphite alloy cast iron. In addition, the shell base body of the composite brake drum is of a cylindrical structure, and a plurality of threaded holes are formed in the front end face of the shell base body.
The manufacturing method of the composite brake drum comprises the following steps:
step 3, preheating treatment: cleaning the formed steel film shell and carrying out preheating treatment at the temperature of 80-150 ℃ to prevent water vapor from being generated when the steel film shell meets with the tide;
step 4, pouring at 1460-1500 ℃, wherein molten iron is contacted with the steel film treated in the step 3 to melt the surface layer of the steel plate, and the thickness of the molten layer is 1-3 mm;
step 5, opening the box, and performing shot blasting polishing on the obtained casting;
and 6, machining to obtain a finished product.
Preferably, the steel plate in the step 1 is A35 high-quality carbon structural steel, and the roll forming size is determined according to a product drawing; the molten iron in the step 2 is RuT350 molten iron, and the processing size is processed according to a product drawing.
The composite vermicular graphite cast iron composite layer is formed on the inner side of the steel flange shell in a centrifugal casting mode, has special graphite structure and performance, and has an expansion coefficient similar to that of the steel flange shell, so that the composite vermicular graphite cast iron composite layer has better fatigue resistance, is less prone to delaminating or cracking compared with a traditional composite brake drum, and is longer in service life. At present, the three-pack failure rate of the traditional composite brake drum is 2% -3%, and the composite brake drum processed by the process is subjected to batch production and is put into the Yunobuan chassis market, so that the three-pack failure rate is reduced to 0.5%, and the reject ratio is greatly reduced.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
Claims (6)
1. The composite brake drum is characterized by comprising a shell base body and an inner layer strengthening body, wherein the inner layer strengthening body is arranged on the inner wall of the shell base body along the circumferential direction, the shell base body is made of an alloy steel plate, and the inner layer strengthening body is a vermicular graphite cast iron composite layer.
2. The composite brake drum of claim 1, wherein the vermicular cast iron composite layer is vermicular + spheroidal graphite alloy cast iron.
3. The composite brake drum as claimed in claim 1, wherein the housing base body is formed in a cylindrical structure, and a plurality of screw holes are provided on a front end surface thereof.
4. A method of manufacturing a composite brake drum according to any one of claims 1 to 3, comprising the steps of:
step 1, punching and blanking a steel plate, rolling and forming the steel plate, and then assembling the formed steel die on a centrifugal casting machine;
step 2, carrying out molten iron smelting and vermicular treatment;
step 3, preheating treatment: cleaning the formed steel film shell and carrying out preheating treatment at the preheating temperature of 80-150 ℃;
step 4, pouring at 1460-1500 ℃, wherein molten iron is contacted with the steel film treated in the step 3 to melt the surface layer of the steel plate, and the thickness of the molten layer is 1-3 mm;
step 5, opening the box, and performing shot blasting polishing on the obtained casting;
and 6, machining to obtain a finished product.
5. The method of manufacturing a composite brake drum according to claim 4, wherein the steel plate in step 1 is a35 high grade carbon structural steel.
6. The method for manufacturing the composite brake drum according to claim 4, wherein the molten iron in the step 2 is RuT350 molten iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011505680.4A CN112524178A (en) | 2020-12-18 | 2020-12-18 | Composite brake drum and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011505680.4A CN112524178A (en) | 2020-12-18 | 2020-12-18 | Composite brake drum and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112524178A true CN112524178A (en) | 2021-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011505680.4A Withdrawn CN112524178A (en) | 2020-12-18 | 2020-12-18 | Composite brake drum and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112524178A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606270A (en) * | 2021-08-19 | 2021-11-05 | 驻马店恒久机械制造有限公司 | Multi-metal composite brake drum and manufacturing method thereof |
| CN114260440A (en) * | 2021-12-26 | 2022-04-01 | 山西汤荣机械制造股份有限公司 | Method for casting bimetal brake drum in short process |
| CN114318035A (en) * | 2021-12-29 | 2022-04-12 | 山西汤荣机械制造股份有限公司 | Preparation method of lightweight composite brake drum |
| CN115106727A (en) * | 2022-07-18 | 2022-09-27 | 洪荣州 | Production process of automobile wheel spoke plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963776U (en) * | 2011-03-28 | 2011-09-07 | 苏州百标汇机械有限公司 | Composite brake drum |
| CN203906614U (en) * | 2014-06-23 | 2014-10-29 | 王汉峰 | Composite brake drum |
| CN207848255U (en) * | 2018-02-06 | 2018-09-11 | 昆明裕恒汽车配件制造有限公司 | A kind of vanadium titanium vermicular cast iron automobile brake drum |
| CN111120546A (en) * | 2020-01-18 | 2020-05-08 | 山东浩信昌盛汽车零部件智能制造有限公司 | Bimetal composite brake drum and manufacturing method thereof |
| CN111621693A (en) * | 2020-07-17 | 2020-09-04 | 四川赢信汇通实业有限公司 | Molybdenum-titanium alloy brake drum and preparation method thereof |
-
2020
- 2020-12-18 CN CN202011505680.4A patent/CN112524178A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201963776U (en) * | 2011-03-28 | 2011-09-07 | 苏州百标汇机械有限公司 | Composite brake drum |
| CN203906614U (en) * | 2014-06-23 | 2014-10-29 | 王汉峰 | Composite brake drum |
| CN207848255U (en) * | 2018-02-06 | 2018-09-11 | 昆明裕恒汽车配件制造有限公司 | A kind of vanadium titanium vermicular cast iron automobile brake drum |
| CN111120546A (en) * | 2020-01-18 | 2020-05-08 | 山东浩信昌盛汽车零部件智能制造有限公司 | Bimetal composite brake drum and manufacturing method thereof |
| CN111621693A (en) * | 2020-07-17 | 2020-09-04 | 四川赢信汇通实业有限公司 | Molybdenum-titanium alloy brake drum and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王峰等: "蠕墨铸铁的性能特点和生产控制", 《现代铸铁》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606270A (en) * | 2021-08-19 | 2021-11-05 | 驻马店恒久机械制造有限公司 | Multi-metal composite brake drum and manufacturing method thereof |
| CN114260440A (en) * | 2021-12-26 | 2022-04-01 | 山西汤荣机械制造股份有限公司 | Method for casting bimetal brake drum in short process |
| CN114318035A (en) * | 2021-12-29 | 2022-04-12 | 山西汤荣机械制造股份有限公司 | Preparation method of lightweight composite brake drum |
| CN114318035B (en) * | 2021-12-29 | 2022-06-07 | 山西汤荣机械制造股份有限公司 | Preparation method of lightweight composite brake drum |
| CN115106727A (en) * | 2022-07-18 | 2022-09-27 | 洪荣州 | Production process of automobile wheel spoke plate |
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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20210319 |