CN112658217A - Manufacturing method of ventilation brake disc - Google Patents
Manufacturing method of ventilation brake disc Download PDFInfo
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- CN112658217A CN112658217A CN202110288184.6A CN202110288184A CN112658217A CN 112658217 A CN112658217 A CN 112658217A CN 202110288184 A CN202110288184 A CN 202110288184A CN 112658217 A CN112658217 A CN 112658217A
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Abstract
The invention provides a manufacturing method of a ventilation brake disc, which comprises the steps of manufacturing a first mould and a second mould which are in the same round cake shape; filling clay green sand into the pouring box, putting the pouring box into the first mould and the two pipeline moulds, and compacting the clay green sand; taking out the first mold and the pipeline mold, putting the second mold into a pouring cavity, and closing the pouring box; blowing nitrogen into the pouring cavity; pouring molten iron into the pouring cavity through the pouring channel, and exhausting air through the gas channel in the pouring process; and processing the blank into a brake disc. Before pouring, nitrogen is blown into the pouring cavity, so that air in the pouring cavity can be exhausted. The manufacturing method of the ventilating brake disc provided by the invention avoids the problem that air holes appear on a casting in the production process of the ventilating brake disc in the prior art, can prolong the service life of the brake disc, increases the braking stability and also enlarges the application range of the brake disc.
Description
Technical Field
The invention relates to the technical field of automobile brake accessories, in particular to a manufacturing method of a ventilation brake disc.
Background
The disc brake consists of a brake disc connected with a wheel and brake calipers at the edge of the disc. When braking, the high-pressure brake oil pushes the brake block to clamp the brake disc so as to generate a braking effect. The disc brake is divided into a common disc brake and a ventilation disc brake. The ventilated disc brake is characterized in that a plurality of circular ventilation holes are drilled on the disc surface, or ventilation grooves are cut on the end surface of the disc or rectangular ventilation holes are prefabricated. The ventilation disc brake utilizes the action of wind flow, and the cooling effect of the ventilation disc brake is better than that of the common disc brake.
The clay green sand pouring method is usually adopted to produce the gray cast iron brake disc, gas is easily generated in the casting process, so that a brake disc casting is provided with air holes, and the casting is abandoned.
Disclosure of Invention
The invention provides a manufacturing method of a ventilation brake disc, which solves the problem that air holes appear on a casting in the production process of the ventilation brake disc in the prior art.
A manufacturing method of a ventilated brake disc comprises the following steps,
firstly, manufacturing a first mould and a second mould which are in a cake shape and have the same shape, wherein cylindrical grooves are formed in two surfaces of the second mould, and strip-shaped through holes are formed in the bottom surfaces of the grooves and are uniformly distributed on the circumference of the second mould; a cylindrical central groove is arranged on the bottom surface of one groove;
filling clay green sand into the pouring box, putting the pouring box into the first mould and the two pipeline moulds, and compacting the clay green sand;
step three, opening the pouring box, taking the first mold and the pipeline mold out to form a pouring cavity, a pouring channel and a gas channel, putting the second mold into the pouring cavity, and closing the pouring box; the pouring box is divided into an upper part and a lower part, and the clay green sand in the upper half part of the pouring box can move along with the clay green sand after being compacted.
Blowing nitrogen into the pouring cavity;
pouring molten iron into the pouring cavity through the pouring channel, exhausting air through the air channel in the pouring process to discharge water vapor in the pouring cavity, so that air holes are prevented from being formed in the blank, and taking out the formed blank after the molten iron is cooled and solidified;
step six, machining: and processing the blank into a brake disc. The blank is provided with a vent hole. Before pouring, nitrogen is blown into the pouring cavity to exhaust air in the pouring cavity, so that the possibility that coal powder reacts with oxygen to generate gas and form air holes on the surface of a blank is reduced. Steam generated by the clay green sand can be discharged in time by pumping air in the pouring process, so that air holes are prevented from being formed on the blank. The probability of generating air holes on the blank is reduced, the yield is improved, the waste of raw materials and labor are reduced, the production cost is reduced, and the production efficiency is improved.
And further, in the fifth step, after the blank is taken out, carrying out X-ray detection on the blank to evaluate the internal quality of the blank, and removing a sprue of the blank.
Further, in the sixth step, the blank is subjected to heat treatment before machining, so that the strength and hardness of the blank are improved, casting burrs on the surface of the blank are removed, and shot blasting is performed on the surface of the blank.
And further, in the sixth step, the surface of the friction ring part of the brake disc is polished smoothly after machining, and dynamic balance detection is carried out on the brake disc.
Further, nitrogen gas was blown into the casting cavity through the gas passage and the casting passage using a constant pressure device.
Further, constant voltage device includes the nitrogen gas source, with the gasbag of nitrogen gas source intercommunication, with the air compressor machine of gasbag intercommunication, set up the body at the air compressor machine air outlet.
Furthermore, one end, away from the air compressor, of the pipe body is communicated with two hoses through a tee joint, the hoses are communicated with a hard pipe, the hard pipe is sleeved with a pipe sleeve, the pipe sleeve is rotatably connected with the pipe body through a connecting rod, a worm is arranged on the outer side of the pipe body, gears are arranged on the pipe sleeves, the gears on the two pipe sleeves are meshed with each other, the worm rotates through a transmission rod driving gear, a worm wheel matched with the worm is arranged at one end of the transmission rod, and a gear matched with the gear on any one pipe. The worm is parallel to the pipe body, and the transmission rod is perpendicular to the worm. When the worm and one end of the pipe body are inserted into the pouring cavity, the worm can be rotated, so that the pipe sleeve drives the hard pipe to rotate by a certain angle, and nitrogen can be conveniently blown into the pouring cavity. The pipe body is provided with a pot filled with coal powder, and a small amount of coal powder is blown into the pouring cavity.
Further, in the first step, a long groove is formed in the bottom surface of one of the grooves. The radiating fins can be formed on the brake disc, so that heat dissipation is facilitated.
According to the technical scheme, the invention has the following advantages:
before pouring, nitrogen is blown into the pouring cavity, air in the pouring cavity can be discharged, and the possibility that coal powder reacts with oxygen to generate gas and form air holes on the surface of a blank is reduced. Steam generated by the clay green sand can be discharged in time by pumping air in the pouring process, so that air holes are prevented from being formed on the blank. The probability of generating air holes on the blank is reduced, the yield is improved, the waste of raw materials and labor are reduced, the production cost is reduced, and the production efficiency is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a second mold according to the present invention.
FIG. 2 is a schematic view of a partial structure of the constant pressure apparatus according to the present invention.
Wherein the reference numerals are: 1. the second die, 2, the groove, 3, the connecting rod, 4, the tee joint, 5, the pipe body, 6, the hose, 7, the hard pipe, 8, the pipe sleeve, 9, the gear, 10, the long groove, 11, the long through hole, 12 and the short through hole.
Detailed Description
In order to make the objects, features and advantages of the present invention more apparent and understandable, the embodiments of the present invention will be described in detail and fully with reference to the accompanying drawings. 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 scope of protection of this patent.
Example 1
As shown in fig. 1 and 2, a method for manufacturing a ventilated brake disc includes the steps of,
firstly, manufacturing a first mould and a second mould 1 which are in a round cake shape and have the same shape, wherein cylindrical grooves 2 are formed in two surfaces of the second mould 1, and strip-shaped through holes are formed in the bottom surfaces of the grooves 2 and are uniformly distributed on the circumference of the second mould 1; the bottom surface of one groove 2 is provided with a cylindrical central groove; a long groove 10 is arranged on the bottom surface of one groove 2. The radiating fins can be formed on the brake disc, so that heat dissipation is facilitated. The through holes comprise long through holes 11 and short through holes 12, and the long through holes 11 and the short through holes 12 are distributed at intervals.
Filling clay green sand into the pouring box, putting the pouring box into the first mould and the two pipeline moulds, and compacting the clay green sand;
step three, opening the pouring box, taking out the first mold and the pipeline mold to form a pouring cavity, a pouring channel and a gas channel, putting the second mold 1 into the pouring cavity, and closing the pouring box; the pouring box is divided into an upper part and a lower part, and the clay green sand in the upper half part of the pouring box can move along with the clay green sand after being compacted.
Blowing nitrogen into the pouring cavity through the gas channel and the pouring channel by using a constant pressure device; the constant pressure device comprises a nitrogen source, an air bag communicated with the nitrogen source, an air compressor communicated with the air bag, and a pipe body 5 arranged at an air outlet of the air compressor. One end, far away from the air compressor, of the pipe body 5 is communicated with two hoses 6 through a tee joint 4, the hoses 6 are communicated with a hard pipe 7, the hard pipe 7 is sleeved with a pipe sleeve 8, the pipe sleeve 8 is connected with the pipe body 5 through a connecting rod 3, a worm is arranged on the outer side of the pipe body 5, gears 9 are arranged on the pipe sleeves 8, the gears 9 on the two pipe sleeves 8 are meshed with each other, the worm rotates through a transmission rod driving gear 9, one end of the transmission rod is provided with a worm gear matched with the worm, and the other end of the transmission rod is provided with. The worm is parallel to the pipe body 5, and the transmission rod is perpendicular to the worm. When the worm and 5 one ends of the pipe body are inserted into the pouring cavity, the worm can be rotated, so that the pipe sleeve 8 drives the hard pipe 7 to rotate for a certain angle, and nitrogen can be conveniently blown into the pouring cavity. A tank filled with coal dust can be arranged on the pipe body 5, and a small amount of coal dust is blown into the pouring cavity.
Pouring molten iron into the pouring cavity through the pouring channel, exhausting air through the air channel in the pouring process to discharge water vapor in the pouring cavity, so that air holes are prevented from being formed in the blank, and taking out the formed blank after the molten iron is cooled and solidified; and (4) after the blank is taken out, carrying out X-ray detection on the blank to evaluate the internal quality of the blank, and removing a sprue of the blank.
And step six, carrying out heat treatment on the blank, improving the strength and hardness of the blank, removing casting burrs on the surface of the blank, and carrying out shot blasting treatment on the surface of the blank. Machining: and processing the blank into a brake disc. And (3) polishing the surface of the friction ring part of the brake disc smoothly, and performing dynamic balance detection on the brake disc.
Before pouring, nitrogen is blown into the pouring cavity to exhaust air in the pouring cavity, so that the possibility that coal powder reacts with oxygen to generate gas and air holes are formed on the surface of a blank is reduced. Steam generated by the clay green sand can be discharged in time by pumping air in the pouring process, so that air holes are prevented from being formed on the blank. The probability of generating air holes on the blank is reduced, the yield is improved, the waste of raw materials and labor are reduced, the production cost is reduced, and the production efficiency is improved.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A manufacturing method of a ventilated brake disc is characterized by comprising the following steps:
firstly, manufacturing a first mould and a second mould (1) which are in a cake shape and have the same shape, forming cylindrical grooves (2) on two surfaces of the second mould (1), forming strip-shaped through holes on the bottom surfaces of the grooves (2), and uniformly distributing the through holes on the circumference of the second mould (1);
filling clay green sand into the pouring box, putting the pouring box into the first mould and the two pipeline moulds, and compacting the clay green sand;
step three, opening the pouring box, taking the first mold and the pipeline mold out to form a pouring cavity, a pouring channel and a gas channel, putting the second mold (1) into the pouring cavity, and closing the pouring box;
blowing nitrogen into the pouring cavity;
pouring molten iron into the pouring cavity through the pouring channel, exhausting air through the gas channel in the pouring process to discharge water vapor in the pouring cavity, and taking out a formed blank after the molten iron is cooled and solidified;
step six, machining: and processing the blank into a brake disc.
2. The method for manufacturing a ventilated brake disc according to claim 1, wherein in the fifth step, after the blank is taken out, the blank is subjected to X-ray detection to evaluate the internal quality of the blank, and a sprue of the blank is removed.
3. The manufacturing method of the ventilated brake disc of claim 1, wherein in the sixth step, before the machining, the blank is subjected to heat treatment to improve the strength and hardness of the blank, cast burrs on the surface of the blank are removed, and the surface of the blank is subjected to shot blasting.
4. The manufacturing method of the ventilated brake disc according to claim 1, wherein in the sixth step, after machining, the surface of the friction ring part of the brake disc is polished smooth, and dynamic balance detection is performed on the brake disc.
5. Method for manufacturing a ventilated brake disc according to any of claims 1 to 4, wherein nitrogen is blown into the casting cavity through the gas channel and the casting channel using a constant pressure device.
6. The manufacturing method of the ventilated brake disc according to claim 5, wherein the constant pressure device comprises a nitrogen source, an air bag communicated with the nitrogen source, an air compressor communicated with the air bag, and a pipe body (5) arranged at an air outlet of the air compressor.
7. The manufacturing method of the ventilation brake disc as claimed in claim 6, wherein one end of the tube body (5) far away from the air compressor is communicated with two hoses (6) through a tee joint (4), the hoses (6) are communicated with a hard tube (7), the hard tube (7) is sleeved with a tube sleeve (8), the tube sleeve (8) is rotatably connected with the tube body (5) through a connecting rod (3), a worm is arranged on the outer side of the tube body (5), gears (9) are arranged on the tube sleeves (8), the gears (9) on the two tube sleeves (8) are meshed with each other, the worm rotates through a transmission rod driving gear (9), one end of the transmission rod is provided with a worm wheel matched with the worm, and the other end of the transmission rod is provided with a gear matched with the gear (9) on any.
8. Method for manufacturing a ventilated brake disc according to claim 1, wherein in step one, an elongated groove (10) is provided on the bottom surface of one of said recesses (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110288184.6A CN112658217A (en) | 2021-03-18 | 2021-03-18 | Manufacturing method of ventilation brake disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110288184.6A CN112658217A (en) | 2021-03-18 | 2021-03-18 | Manufacturing method of ventilation brake disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112658217A true CN112658217A (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110288184.6A Pending CN112658217A (en) | 2021-03-18 | 2021-03-18 | Manufacturing method of ventilation brake disc |
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| CN (1) | CN112658217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888256A (en) * | 2022-05-18 | 2022-08-12 | 河南金宇耐磨材料科技有限公司 | Centrifugal device for manufacturing novel cutter ring |
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|---|---|---|---|---|
| CN102107261A (en) * | 2009-12-23 | 2011-06-29 | 天津市盛兴祥机械制造有限公司 | Production technology for casting brake disk air channel with pre-coated sand core method |
| CN102239344A (en) * | 2008-05-08 | 2011-11-09 | 瑞锡尼弗莱诺斯可变资本股份公司 | Composite brake disc |
| CN105033230A (en) * | 2015-06-01 | 2015-11-11 | 科华控股股份有限公司 | Anaerobic pouring device for tapping of pressure pouring furnace and employing inert gas for shielding |
| CN105458184A (en) * | 2015-12-09 | 2016-04-06 | 禹州市昆仑模具有限公司 | Workblank manufacturing method of automobile brake disc |
| US9850969B2 (en) * | 2012-06-07 | 2017-12-26 | Akebono Brake Industry Co., Ltd. | Multi-plane brake rotor hat holes and method of making the same |
| CN207746396U (en) * | 2017-12-29 | 2018-08-21 | 湖北航特装备制造股份有限公司 | A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile |
| CN111471887A (en) * | 2020-05-14 | 2020-07-31 | 保定立中东安轻合金部件制造有限公司 | Brake disc and manufacturing method and manufacturing device thereof |
| CN111561531A (en) * | 2020-04-24 | 2020-08-21 | 保定立中东安轻合金部件制造有限公司 | Lightweight brake disc and brake disc manufacturing process |
-
2021
- 2021-03-18 CN CN202110288184.6A patent/CN112658217A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239344A (en) * | 2008-05-08 | 2011-11-09 | 瑞锡尼弗莱诺斯可变资本股份公司 | Composite brake disc |
| CN102107261A (en) * | 2009-12-23 | 2011-06-29 | 天津市盛兴祥机械制造有限公司 | Production technology for casting brake disk air channel with pre-coated sand core method |
| US9850969B2 (en) * | 2012-06-07 | 2017-12-26 | Akebono Brake Industry Co., Ltd. | Multi-plane brake rotor hat holes and method of making the same |
| CN105033230A (en) * | 2015-06-01 | 2015-11-11 | 科华控股股份有限公司 | Anaerobic pouring device for tapping of pressure pouring furnace and employing inert gas for shielding |
| CN105458184A (en) * | 2015-12-09 | 2016-04-06 | 禹州市昆仑模具有限公司 | Workblank manufacturing method of automobile brake disc |
| CN207746396U (en) * | 2017-12-29 | 2018-08-21 | 湖北航特装备制造股份有限公司 | A kind of full aluminium thin-walled hollow Rear secondary frame for vehicle metal-mold low-pressure casting mold of automobile |
| CN111561531A (en) * | 2020-04-24 | 2020-08-21 | 保定立中东安轻合金部件制造有限公司 | Lightweight brake disc and brake disc manufacturing process |
| CN111471887A (en) * | 2020-05-14 | 2020-07-31 | 保定立中东安轻合金部件制造有限公司 | Brake disc and manufacturing method and manufacturing device thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888256A (en) * | 2022-05-18 | 2022-08-12 | 河南金宇耐磨材料科技有限公司 | Centrifugal device for manufacturing novel cutter ring |
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Application publication date: 20210416 |