CN112808852A - Integral cold pressing die for integrated thrust gas bearing and preparation process of integral cold pressing die - Google Patents
Integral cold pressing die for integrated thrust gas bearing and preparation process of integral cold pressing die Download PDFInfo
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- CN112808852A CN112808852A CN202011629982.2A CN202011629982A CN112808852A CN 112808852 A CN112808852 A CN 112808852A CN 202011629982 A CN202011629982 A CN 202011629982A CN 112808852 A CN112808852 A CN 112808852A
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- die
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- 238000003825 pressing Methods 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title description 4
- 239000011888 foil Substances 0.000 claims abstract description 71
- 238000000034 method Methods 0.000 claims abstract description 36
- 230000008569 process Effects 0.000 claims abstract description 36
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 31
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 12
- 230000001629 suppression Effects 0.000 claims abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 6
- 229910001090 inconels X-750 Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000003466 welding Methods 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 4
- 230000001788 irregular Effects 0.000 abstract description 4
- -1 Polytetrafluoroethylene Polymers 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D33/00—Special measures in connection with working metal foils, e.g. gold foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention relates to an integral cold pressing die for an integrated thrust gas bearing and a pressing process thereof, wherein the integral cold pressing die comprises a base, a die block, a foil to be processed, an edge pressing block, a PTFE (Polytetrafluoroethylene) plate and a pressing head; the base has the annular holding tank, mould piece circumference is arranged in the annular holding tank, the last profile of mould piece is for being used for the fan-shaped inclined plane at the surface suppression wedge-shaped molded lines of waiting to process the foil, the piece of borduring can be dismantled with the base and be connected, it is located between mould piece and the piece of borduring to wait to process the foil, the piece of borduring has the hole of stepping down, the PTFE board is placed and is being located in the downthehole foil top of waiting to process of stepping down, the pressure head is located PTFE board top. The cold pressing die can realize cold pressing forming of the foil to be processed, can be integrally formed in the manufacturing process of the thrust foil bearing, avoids the defects of irregular warping and stress concentration caused by a welding process, simplifies the operation and quality management process, is suitable for mass production and processing, and is high in efficiency, low in cost and convenient to use.
Description
Technical Field
The invention relates to the technical field of elastic foil bearing manufacturing, in particular to an integrated thrust gas bearing integral cold-pressing die and a preparation process thereof.
Background
The working principle of the elastic foil dynamic pressure gas bearing is that gas with certain viscosity passes through a convergent space at a certain speed, so that effective wedge-shaped dynamic pressure is formed, and the supporting effect is achieved. The high-temperature wear-resistant high-speed gas turbine has the advantages of strong high-temperature service capability, no theoretical wear, good high-speed stability and the like, and is widely applied to rotary machines such as air compressors, micro gas turbines and the like.
The traditional thrust bearing mainly comprises a top layer foil, a bottom layer foil and a bearing seat. The top layer of foil is a plurality of fan-shaped flat foils and forms a friction pair with the rotor thrust disc. The bottom foil is in various forms such as corrugation, rubber, bubble and the like, and the purpose of the bottom foil is to provide elastic support. Typically, a plurality of top and bottom foils are secured to the housing by welding.
Practical experience shows that in the process of welding the thrust bearing, the situations of infirm welding, difficulty in mastering of fusion depth, warping of a foil after welding, large welding stress and the like can occur, so that the quality and performance of the bearing are greatly fluctuated, and even destructive consequences are generated on a machine set. Thus, conventional thrust bearing designs and corresponding manufacturing processes are disadvantageous in terms of quality management and are not suitable for mass, standardized production.
Disclosure of Invention
To the not enough of above-mentioned prior art, the technical problem that this patent application will solve how to provide a simple structure, with low costs, efficient, the simple convenient integral type thrust gas bearing whole cold pressing die utensil of use and preparation technology for the bearing foil error that the suppression obtained is little, and the precision is high, and the wholeness is good, and integrated into one piece avoids irregular warpage and the stress concentration defect that welding process caused.
In order to solve the technical problems, the invention adopts the following technical scheme:
an integrated thrust gas bearing integral cold pressing die comprises a base, a die block, a foil to be processed, an edge pressing block, a PTFE plate and a pressing head; the base has the annular holding tank, mould piece circumference is arranged in the annular holding tank, the last profile of mould piece is for being used for the fan-shaped inclined plane at the surface suppression wedge-shaped molded lines of waiting to process the foil, the piece of borduring can be dismantled with the base and be connected, it is located between mould piece and the piece of borduring to wait to process the foil, the piece of borduring has the hole of stepping down, the PTFE board is placed and is being located in the downthehole foil top of waiting to process of stepping down, the pressure head is located PTFE board top.
The groove wall of the annular accommodating groove of the base is fixedly provided with a boss, the mold block is right opposite to the boss, a groove matched with the boss is formed in the boss, and the groove is in inserting fit with the boss.
The base is provided with pin holes in a distributed mode, pins are inserted in the pin holes, and the foil to be processed is provided with notches opposite to the pins.
Wherein, the height difference of the fan-shaped inclined plane of the die block is 1-5% of the fan-shaped inner diameter.
Wherein, the blank holder piece with the base passes through fastening bolt fixed connection.
A pressing process of an integral cold pressing die for an integrated thrust gas bearing comprises the following steps:
s1, cleaning each element for later use;
s2, placing the die block into a base, and selecting the rotation direction of the die block according to the form of a target bearing;
s3, placing the pin into the base, and installing a foil to be processed at the same time;
s4, placing the edge pressing block on a foil to be processed, wherein the edge pressing force needs to be selected by comprehensively considering the geometric dimension of the target bearing and the material characteristics of the foil to be processed, and the value range of the edge pressing force can be set to be 0.05-2 MPa. Taking the nickel-based alloy with the thickness of 0.08mm and the Inconel X-750 annealing state as an example, the blank holder force value is determined to be 0.5 MPa. In the processing process, the foil does not obviously slide, after the processing is finished, the edge of the foil does not obviously reduce the thickness, and the blank holder force is reasonable in value;
s5, the PTFE plate is placed on the foil to be processed, and the PTFE plate mainly serves for pressure equalization and solid lubrication, so that cracking and wrinkling of the foil to be processed in the pressing process are avoided. Namely, the PTFE plate is flat and smooth, and the friction coefficient between the PTFE plate and the foil to be processed is less than 0.1;
s6, placing the pressure head on a PTFE plate, and loading and pressing through a servo press. And adjusting the cold pressing load according to the geometric dimension and the material of the target bearing. Taking a nickel-based alloy with the thickness of 0.08mm and the Inconel X-750 annealing state as an example, the pressing step is as follows: loading at 0.05MPa/s, loading to 30MPa, maintaining the pressure for 15min, and unloading.
In conclusion, the cold-pressing die can realize cold-pressing forming of the foil to be processed, can be integrally formed in the manufacturing process of the thrust foil bearing, avoids the defects of irregular warping and stress concentration caused by a welding process, simplifies the operation and quality management process, is suitable for mass production and processing, and is high in efficiency, low in cost and convenient to use.
Drawings
Fig. 1 is a schematic view of the overall structure of the integrated thrust gas bearing integral cold-pressing die.
Fig. 2 is a schematic structural view of the mold block of fig. 1.
Fig. 3 is a schematic structural diagram of the base in fig. 1.
Fig. 4 is a schematic view of a foil to be processed before processing 4.
Fig. 5 is a schematic view of the foil to be processed after processing 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
As shown in fig. 1-5, an integral cold-pressing die for a thrust gas bearing comprises a base 1, a die block 3, a foil 4 to be processed, a blank holder block 5, a PTFE plate 7 and a pressing head 8; base 1 has the annular holding tank, 3 circumference of mould piece are arranged in the annular holding tank, the last profile of mould piece 3 is for being used for waiting to process the fan-shaped inclined plane of the surface suppression wedge-shaped molded lines of foil, blank pressing piece 5 can dismantle with base 1 and be connected, it is located between mould piece 3 and blank pressing piece 5 to wait to process foil 4, the blank pressing piece has the hole of stepping down, PTFE board 7 is placed and is being stepped down downthehole and be located and wait to process foil 4 top, pressure head 8 is located PTFE board 7 top.
Like this, arrange the mould piece in annular holding tank along the circumference, will wait to process the foil and be connected with the base with the blank pressing piece, place the PTFE board on waiting to process the foil, arrange the pressure head in the PTFE board, realize cold press molding. The cold pressing die can realize cold pressing forming of the foil to be processed, can be integrally formed in the manufacturing process of the thrust foil bearing, avoids the defects of irregular warping and stress concentration caused by a welding process, simplifies the operation and quality management process, is suitable for mass production and processing, and is high in efficiency, low in cost and convenient to use. The PTFE plate realizes uniform and flexible loading, and avoids foil fracturing.
The groove wall of the annular accommodating groove of the base 1 is fixedly provided with a boss, the mold block is right opposite to the boss, a groove matched with the boss is formed in the boss, and the groove is in inserting fit with the boss. The groove and the boss are in plug-in fit, so that the processed foil is prevented from being torn due to rotation in the pressing process.
The base is provided with pin holes in a distributed mode, pins 2 are inserted in the pin holes, and the foil to be processed is provided with notches opposite to the pins. The pin is used for positioning, so that the accurate positioning and rotation prevention functions of the foil to be processed in the pressing process are achieved, and the processing precision is guaranteed.
Wherein, the height difference of the fan-shaped inclined plane of the die block is 1-5% of the fan-shaped inner diameter. The ductility and the structural strength of the foil to be processed can be better ensured.
Wherein, the blank holder piece with the base passes through fastening bolt 6 fixed connection. The edge pressing effect is achieved through fastening connection.
The integrated molding of the foil 4 to be processed can be realized by arranging the mold blocks 3 with designed quantity and parameters in the circumferential direction, so that the welding process in the bearing manufacturing process is eliminated, and the manufacturing process is greatly simplified. Meanwhile, the relative position of the foil 4 to be processed is accurately controlled by the pin 2, so that the quality of the bearing is improved and the product performance and the stable quality in the mass production process are facilitated compared with the traditional manufacturing method.
The practical experiment measurement result shows that the error of each convergent wedge in the circumferential dimension of the thrust foil bearing processed by the process can be controlled within 3 percent, and the manufacturing precision is greatly improved.
A pressing process of an integral cold pressing die for an integrated thrust gas bearing comprises the following steps:
s1, cleaning each element for later use;
s2, placing the die block into a base, and selecting the rotation direction of the die block according to the form of a target bearing;
s3, placing the pin into the base, and installing a foil to be processed at the same time;
s4, placing the edge pressing block on a foil to be processed, wherein the edge pressing force needs to be selected by comprehensively considering the geometric dimension of the target bearing and the material characteristics of the foil to be processed, and the value range of the edge pressing force can be set to be 0.05-2 MPa. Taking the nickel-based alloy with the thickness of 0.08mm and the Inconel X-750 annealing state as an example, the blank holder force value is determined to be 0.5 MPa. In the processing process, the foil does not obviously slide, after the processing is finished, the edge of the foil does not obviously reduce the thickness, and the blank holder force is reasonable in value;
s5, the PTFE plate is placed on the foil to be processed, and the PTFE plate mainly serves for pressure equalization and solid lubrication, so that cracking and wrinkling of the foil to be processed in the pressing process are avoided. Namely, the PTFE plate is flat and smooth, and the friction coefficient between the PTFE plate and the foil to be processed is less than 0.1;
s6, placing the pressure head on a PTFE plate, and loading and pressing through a servo press. And adjusting the cold pressing load according to the geometric dimension and the material of the target bearing. Taking a nickel-based alloy with the thickness of 0.08mm and the Inconel X-750 annealing state as an example, the pressing step is as follows: loading at 0.05MPa/s, loading to 30MPa, maintaining the pressure for 15min, and unloading.
Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (6)
1. An integrated thrust gas bearing integral cold pressing die is characterized by comprising a base, a die block, a foil to be processed, an edge pressing block, a PTFE plate and a pressing head;
the base has the annular holding tank, mould piece circumference is arranged in the annular holding tank, the last profile of mould piece is for being used for the fan-shaped inclined plane at the surface suppression wedge-shaped molded lines of waiting to process the foil, the piece of borduring can be dismantled with the base and be connected, it is located between mould piece and the piece of borduring to wait to process the foil, the piece of borduring has the hole of stepping down, the PTFE board is placed and is being located in the downthehole foil top of waiting to process of stepping down, the pressure head is located PTFE board top.
2. The integral cold pressing die for the thrust gas bearing as recited in claim 1, wherein a boss is fixedly mounted on a groove wall of the annular accommodating groove of the base, a groove matched with the boss is formed in the die block opposite to the boss, and the groove is in inserted fit with the boss.
3. The integral cold pressing die for the thrust gas bearing as claimed in claim 2, wherein the base is provided with pin holes, pins are inserted into the pin holes, and the foil to be processed is provided with notches opposite to the pins.
4. The integrated thrust gas bearing cold-pressing die as claimed in claim 3, wherein the height difference of the fan-shaped inclined planes of the die blocks is 1-5% of the fan-shaped inner diameter.
5. The integrated thrust gas bearing whole cold-pressing die according to claim 4, wherein the edge pressing block is fixedly connected with the base through fastening bolts.
6. The pressing process of the integral cold pressing die for the integral thrust gas bearing is characterized by comprising the following steps of:
s1, cleaning each element for later use;
s2, placing the die block into a base, and selecting the rotation direction of the die block according to the form of a target bearing;
s3, placing the pin into the base, and installing a foil to be processed at the same time;
s4, placing the edge pressing block on a foil to be processed, wherein the edge pressing force needs to be selected by comprehensively considering the geometric dimension of the target bearing and the material characteristics of the foil to be processed, and the value range of the edge pressing force can be set to be 0.05-2 MPa. Taking the nickel-based alloy with the thickness of 0.08mm and the Inconel X-750 annealing state as an example, the blank holder force value is determined to be 0.5 MPa. In the processing process, the foil does not obviously slide, after the processing is finished, the edge of the foil does not obviously reduce the thickness, and the blank holder force is reasonable in value;
s5, the PTFE plate is placed on the foil to be processed, and the PTFE plate mainly serves for pressure equalization and solid lubrication, so that cracking and wrinkling of the foil to be processed in the pressing process are avoided. Namely, the PTFE plate is flat and smooth, and the friction coefficient between the PTFE plate and the foil to be processed is less than 0.1;
s6, placing the pressure head on a PTFE plate, and loading and pressing through a servo press. And adjusting the cold pressing load according to the geometric dimension and the material of the target bearing. Taking a nickel-based alloy with the thickness of 0.08mm and the Inconel X-750 annealing state as an example, the pressing step is as follows: loading at 0.05MPa/s, loading to 30MPa, maintaining the pressure for 15min, and unloading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629982.2A CN112808852A (en) | 2020-12-31 | 2020-12-31 | Integral cold pressing die for integrated thrust gas bearing and preparation process of integral cold pressing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629982.2A CN112808852A (en) | 2020-12-31 | 2020-12-31 | Integral cold pressing die for integrated thrust gas bearing and preparation process of integral cold pressing die |
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| Publication Number | Publication Date |
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| CN112808852A true CN112808852A (en) | 2021-05-18 |
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| CN202011629982.2A Pending CN112808852A (en) | 2020-12-31 | 2020-12-31 | Integral cold pressing die for integrated thrust gas bearing and preparation process of integral cold pressing die |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201921938U (en) * | 2010-12-24 | 2011-08-10 | 山东力诺瑞特新能源有限公司 | Universal flanging die for liner of solar water heater |
| CN103302179A (en) * | 2013-05-03 | 2013-09-18 | 西安交通大学 | Squeezing and bending mold for supporting arch foil of elastic foil gas radial bearing |
| CN103341553A (en) * | 2013-05-29 | 2013-10-09 | 南京航空航天大学 | Wave foil die and manufacturing process thereof |
| CN103506487A (en) * | 2012-06-28 | 2014-01-15 | 成都陵川特种工业有限责任公司 | Split type quick switch rim flaring mold |
| KR101432537B1 (en) * | 2013-04-10 | 2014-08-25 | 국방과학연구소 | A method of bending a top foil of thrust air foil bearing |
| CN105689545A (en) * | 2016-02-01 | 2016-06-22 | 上海良基博方汽车发动机零部件制造股份有限公司 | Rapid processing device of thrust bearing bevel oil groove of turbocharger |
| CN106704361A (en) * | 2015-11-17 | 2017-05-24 | 科特布斯森夫滕贝格勃兰登堡工业大学 | Foil gas bearing assembly with self-induced cooling |
| KR20190086878A (en) * | 2018-01-15 | 2019-07-24 | 주식회사 뉴로스 | Air foil thrust bearing and manufacturing method thereof |
| CN110899501A (en) * | 2019-11-22 | 2020-03-24 | 西安飞机工业（集团）有限责任公司 | Integral forming die and forming method for annular lip of aircraft engine |
-
2020
- 2020-12-31 CN CN202011629982.2A patent/CN112808852A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201921938U (en) * | 2010-12-24 | 2011-08-10 | 山东力诺瑞特新能源有限公司 | Universal flanging die for liner of solar water heater |
| CN103506487A (en) * | 2012-06-28 | 2014-01-15 | 成都陵川特种工业有限责任公司 | Split type quick switch rim flaring mold |
| KR101432537B1 (en) * | 2013-04-10 | 2014-08-25 | 국방과학연구소 | A method of bending a top foil of thrust air foil bearing |
| CN103302179A (en) * | 2013-05-03 | 2013-09-18 | 西安交通大学 | Squeezing and bending mold for supporting arch foil of elastic foil gas radial bearing |
| CN103341553A (en) * | 2013-05-29 | 2013-10-09 | 南京航空航天大学 | Wave foil die and manufacturing process thereof |
| CN106704361A (en) * | 2015-11-17 | 2017-05-24 | 科特布斯森夫滕贝格勃兰登堡工业大学 | Foil gas bearing assembly with self-induced cooling |
| CN105689545A (en) * | 2016-02-01 | 2016-06-22 | 上海良基博方汽车发动机零部件制造股份有限公司 | Rapid processing device of thrust bearing bevel oil groove of turbocharger |
| KR20190086878A (en) * | 2018-01-15 | 2019-07-24 | 주식회사 뉴로스 | Air foil thrust bearing and manufacturing method thereof |
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Application publication date: 20210518 |
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