CN115647854B - Machining method for bearing support sleeve hole - Google Patents
Machining method for bearing support sleeve hole Download PDFInfo
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- CN115647854B CN115647854B CN202211176295.9A CN202211176295A CN115647854B CN 115647854 B CN115647854 B CN 115647854B CN 202211176295 A CN202211176295 A CN 202211176295A CN 115647854 B CN115647854 B CN 115647854B
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- bushing
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000003754 machining Methods 0.000 title abstract description 14
- 238000003825 pressing Methods 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000010009 beating Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention discloses a method for machining a bearing support bushing hole, which comprises the steps of taking the side surface of a base, which is far away from the bushing hole, as a reference end surface A surface, finishing a first bushing hole and the reference end surface A surface after finishing all the other surfaces of a bearing support and finishing the fixed position of a part, firstly machining the reference end surface A surface, then calibrating the reference end surface A surface, resetting a central shaft of the first bushing hole, finely boring the first bushing hole, and ensuring the stable distance from the central shaft of the first bushing hole to the reference end surface A surface, thereby ensuring the position degree of the first bushing hole of the part.
Description
Technical Field
The invention relates to the field of aeroengine part manufacturing, in particular to a processing method of a bearing support sleeve hole.
Background
Rigid bearing support assemblies are an important component of helicopters. In order to reduce the weight of parts, aluminum alloy is generally used as a material, and in the use process, the motion of the bearing can generate forces in different directions for the bearing support, but the aluminum alloy is insufficient in strength and locally can generate serious deformation, so that an inlaid steel sleeve is generally designed in the bearing support to ensure the load strength of the bearing support; the boring position of the steel sleeve is a critical dimension, and a bearing bush (steel sleeve for short) embedded in the aluminum alloy is a common part.
The traditional processing mode relies on the fixed mode of location part assurance size of operator self feel, when processing rigid bearing support, the position degree qualification rate of steel sleeve hole only 40%, there is great deformation when compressing tightly, directly lead to steel sleeve hole aperture processing disqualification, the part takes place the skew easily when the course of working simultaneously, can directly lead to the final position deviation of part steel sleeve hole, it is difficult to reach the requirement product processing qualification rate of design drawing not high, that is to say that the aperture size and the position degree of bearing bush are difficult to process to the compliance requirement, if disqualification will directly scrap, unable reprocess, this product is expensive, the processing cycle is long, once scrap loss is great, and the course of working inefficiency.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing a processing method of a bearing support sleeve hole with high qualification rate.
In order to solve the technical problems, the invention adopts the following technical scheme:
a processing method of a bearing support sleeve hole comprises the following steps:
s1, taking the upper end face of a support body of a bearing support as a reference end face C face, selecting at least three uniform compression points on the reference end face C face, compressing and fixing the reference end face C face;
s2, semi-finishing the reference end face A and the first bushing hole by taking the side face of the base of the bearing support, which is far away from the bushing hole, as the reference end face A;
s3, unloading the pressing force of the surface C of the reference end surface, and pressing and fixing the bottom surface of the first lining hole;
s4, finishing a reference end face C face;
s5, unloading the compression force of the bottom surface of the first lining hole, selecting at least three uniform compression points on the surface of the reference end surface C, compressing and fixing the surface of the reference end surface C;
s6, after finishing the reference end face A, aligning the reference end face A and the reference end face C again, setting the position of the central axis of the bushing hole according to the theoretical distance between the reference end face A and the central axis of the first bushing hole, and finishing the first bushing hole.
As a further improvement to the above technical solution:
in the steps S1 and S5, the optimal clamping force is obtained by adopting a surface beating mode before the reference end face C is pressed and fixed.
The optimal clamping force refers to the clamping force that when plane runout of even pressing points is checked, the end face runout is within 0.01mm and the plane relative runout of the pressing points is within 0.006 mm.
In the step S2, the bushing hole is a steel sleeve hole.
In the steps S1 and S5, the reference end face C is pressed and fixed by a jig.
When the end face C surface is pressed and used as a reference end face, the lower end face of the support body is used as a supporting surface, the outer circle of the third bushing hole is used as a positioning surface, and the reference end face C surface is used as a fixing surface.
In the step S3, when the bottom surface of the first bushing hole is pressed and fixed, the lower end surface of the support body is used as a supporting surface, the outer circle of the third bushing hole is used as a positioning surface, and the bottom surface of the first bushing hole is used as a fixing surface.
In the step S6, the probe is used to realign the reference end faces a and C.
Compared with the prior art, the invention has the advantages that:
the machining method changes the traditional mode of fixing and positioning the parts by means of hand feeling of operators, and at least 3 points are required to be uniformly pressed when the parts are pressed, so that pressing force is adjusted, clamping deformation of the parts is reduced, machining sequences are adjusted, finish machining of a reference end face and a bushing hole is placed at the end of all finish machining, after the rest finish machining is finished, the reference end face is machined again, before the bushing hole is bored, a machine tool probe is used for calibrating the end face, the reference face is re-aligned again, deflection of the parts during machining is corrected, finish machining of the bushing hole is finished, and therefore the position degree and stability of machining of the bushing hole are guaranteed.
Drawings
Fig. 1 is a front view of the bearing support of the present invention.
Fig. 2 is a cross-sectional view taken along line A-A in fig. 1.
The reference numerals in the drawings denote: 1. a support body; 11. an inner hole of the support; 2. a base; 3. a bushing; 31. a liner hole; 311. a first liner aperture; 312. a second liner aperture; 313. and a third liner aperture.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples. The instruments or materials used in the present invention are commercially available unless otherwise specified.
Example 1:
the bearing support of this embodiment is shown in fig. 1 and 2, including support body 1 and the base 2 that is used for supporting support body 1, support body 1 is equipped with support hole 11, be equipped with bush 3 in the support hole 11, support hole 11 cooperatees with the bush 3 outer wall, bush 3 is equipped with bush hole 31 along bush 3 center pin direction, bush hole 31 is including the first bush hole 311, second bush hole 312 and the third bush hole 313 that set gradually in proper order, the internal diameter of first bush hole 311 is R1, the internal diameter of second bush hole 312 is R2, the internal diameter of third bush hole 313 is R3, satisfy R1 > R3 > R2.
In this embodiment, the machining difficulty is dimensioned in terms of the diameter phi of the first liner hole 311mm and a position of 0.02mm (reference to A, B, C).
The invention discloses a processing method of a bearing support sleeve hole, which specifically comprises the following steps:
s1, taking the upper end face of a support body 1 of a bearing support as a reference end face C face, selecting at least three uniform compression points on the reference end face C face, and compressing and fixing the reference end face C face by adopting a clamp;
s2, semi-finishing the reference end face A and the bushing hole 31 by taking the side surface of the base 2 of the bearing support, which is far away from the bushing hole 31, as the reference end face A;
s3, unloading the pressing force of the surface C of the reference end surface, and fixing the pressing force on the bottom surface of the first lining hole 311 by using a circular pressing block;
s4, finishing a reference end face C face;
s5, unloading the compression force of the bottom surface of the first lining hole 311, selecting at least three uniform compression points on the surface of the reference end surface C, and compressing and fixing the surface of the reference end surface C by adopting a clamp;
s6, after finishing the reference end face A, the reference end face A and the reference end face C are aligned again by using a probe, the position of the central axis of the bushing hole 31 is set according to the theoretical distance between the reference end face A and the central axis of the bushing hole 31, and the bushing hole 31 is finished.
In the steps S1 and S5, the pressing force of the part is controlled, and the deformation of the part is reduced: by processing the sample, the optimal clamping and supporting pressure is obtained by adopting a meter beating mode when the part is compressed (the optimal clamping force can be obtained by checking the planar runout of 3 parts which are uniformly compressed, the planar runout of the compressed parts is ensured to be within 0.01mm, the planar runout of the compressed parts is ensured to be within 0.006mm relatively), standard solidification is carried out on the sample, and the clamping is carried out according to the pressure in the future clamping, so that the clamping consistency of the part is ensured, and the deformation of the part is reduced.
In the steps S1 and S5, the lower end face (D face) of the support body 1 is supported on the fixture, the outer circle (E outer circle) of the third bushing hole 313 is positioned on the fixture, and the upper end face (C face) of the support body 1 is the fixture pressing block fixing face.
In the step S3, the lower end surface (D surface) of the support body 1 rests on the fixture, the outer circle (E outer circle) of the third bushing hole 313 is positioned on the fixture, and the bottom surface of the first bushing hole 311 is a fixture pressing block fixing surface (a circular pressing block is used to ensure uniform pressing force).
In the step S6, the machining route is optimized, the position degree is guaranteed to be 0.02mm (based on A, B, C), and after the rest surfaces are finished and the fixing position of the part is converted, the finishing of the first bushing hole 311 (the inner hole of the B surface in fig. 2) and the reference end surface a (the side surface of the base 2, which is far from the first bushing hole 311, is the reference end surface a surface, and the a surface in fig. 2) is performed: the reference end face a is finished first, and then the first liner hole 311 is finished.
In the step S6, the machine tool probe is used to automatically measure and realign the position of the reference end face a and the center of the first bushing hole 311, adjust the theoretical value of the program, correct the offset of the part, and finish the first bushing hole 311 (the inner hole of the B-face in fig. 2).
The invention takes the side surface of the base 2 of the bearing support, which is far away from the bushing hole 31, as a reference end surface A surface, after finishing the rest surfaces of the bearing support and converting the fixed position of the part, finishing the first bushing hole 311 and the reference end surface A surface, at the moment, firstly, finishing the reference end surface A surface, then, using a machine tool probe to calibrate the reference end surface A surface, resetting the central shaft of the first bushing hole 311, finely boring the first bushing hole 311, ensuring the stable distance from the central shaft of the first bushing hole 311 to the reference end surface A surface (93.23 mm in the embodiment, the distance is a key factor of out-of-tolerance position), thereby ensuring the position degree ((A, B, C reference) of 0.02mm of the part).
Comparative example 1
The method for processing the bearing support sleeve hole of the comparative example is substantially the same as that of the embodiment 1, and specifically comprises the following steps:
s1, selecting at least three uniform compression points on the upper end surface (C surface) of a bearing support body 1, and compressing and fixing the bearing support by adopting a clamp;
s2, finishing the bottom surface of the bearing support base 2 and the bushing hole 31;
s3, removing an outer pressing plate, and fixing the outer pressing plate on the bottom surface of the first lining hole 311 by using a circular pressing block;
s4, finishing the upper end surface (C surface) of the support body 1;
the processing result finds: the first bushing hole 311 is unqualified in both aperture and position (the part is greatly deformed).
While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (7)
1. A processing method of a bearing support sleeve hole is characterized by comprising the following steps: the method comprises the following steps:
s1, taking the upper end face of a support body (1) of a bearing support as a reference end face C face, selecting at least three uniform compression points on the reference end face C face, compressing and fixing the reference end face C face;
s2, semi-finishing the reference end face A surface and the bushing hole (31) by taking the side surface of the base (2) of the bearing support, which is far away from the bushing hole (31), as the reference end face A surface;
s3, unloading the pressing force of the surface C of the reference end surface, and pressing and fixing the bottom surface of the first lining hole (311);
s4, finishing a reference end face C face;
s5, unloading the compression force of the bottom surface of the first lining hole (311), selecting at least three uniform compression points on the surface of the reference end surface C, compressing and fixing the surface of the reference end surface C;
s6, finishing the surface A of the reference end surface, realigning the surface A of the reference end surface and the surface C of the reference end surface, setting the position of the central shaft of the first lining hole (311) according to the theoretical distance between the surface A of the reference end surface and the central shaft of the first lining hole (311), and finishing the first lining hole (311);
the bushing hole (31) includes a first bushing hole (311), a second bushing hole (312), and a third bushing hole (313) sequentially arranged in this order.
2. The processing method according to claim 1, characterized in that: in the steps S1 and S5, the best clamping force is obtained by adopting a surface beating mode before the reference end face C is pressed and fixed; the optimal clamping force refers to the clamping force that when plane runout of even pressing points is checked, the end face runout is within 0.01mm and the plane relative runout of the pressing points is within 0.006 mm.
3. The processing method according to claim 1, characterized in that: in the step S2, the bushing hole (31) is a steel bushing hole.
4. A processing method according to any one of claims 1 to 3, characterized in that: in the steps S1 and S5, the reference end face C is pressed and fixed by a jig.
5. The method of claim 4, wherein: when the reference end face C surface is pressed and fixed, the lower end face of the support body (1) is used as a supporting surface, the outer circle of the third bushing hole (313) is used as a positioning surface, and the reference end face C surface is used as a fixing surface.
6. The processing method according to claim 5, wherein: in the step S3, when the bottom surface of the first bushing hole (311) is pressed and fixed, the lower end surface of the support body (1) is used as a supporting surface, the outer circle of the third bushing hole (313) is used as a positioning surface, and the bottom surface of the first bushing hole (311) is used as a fixing surface.
7. The processing method according to claim 6, wherein: in the step S6, the probe is used to realign the reference end faces a and C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211176295.9A CN115647854B (en) | 2022-09-26 | 2022-09-26 | Machining method for bearing support sleeve hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211176295.9A CN115647854B (en) | 2022-09-26 | 2022-09-26 | Machining method for bearing support sleeve hole |
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| Publication Number | Publication Date |
|---|---|
| CN115647854A CN115647854A (en) | 2023-01-31 |
| CN115647854B true CN115647854B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211176295.9A Active CN115647854B (en) | 2022-09-26 | 2022-09-26 | Machining method for bearing support sleeve hole |
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| CN (1) | CN115647854B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100921902B1 (en) * | 2008-04-14 | 2009-10-14 | 삼익정공(주) | A Round Shaft Support Manufacturing Method in the Linear Bushing and the Round Shaft Support manufactured by Its Method |
| CN102152075A (en) * | 2011-03-18 | 2011-08-17 | 威尔机械江苏有限公司 | Method for processing bearing pedestal of continuous casting machine |
| CN103769805A (en) * | 2013-12-20 | 2014-05-07 | 柳州正菱集团有限公司 | Method for machining bearing support face of automobile intermediate shaft |
| CN106514158A (en) * | 2016-12-26 | 2017-03-22 | 中国科学院光电技术研究所 | Precision machining method for high-precision U-shaped low-rigidity bearing block type parts |
| CN106838019A (en) * | 2017-01-23 | 2017-06-13 | 赵艳蕊 | Water supply pumping plant bearing block and renovation technique |
| CN207673722U (en) * | 2018-01-08 | 2018-07-31 | 长沙中传航空传动有限公司 | A kind of rigid bearing bearing lubrication system |
| CN111250929A (en) * | 2020-01-18 | 2020-06-09 | 浙江农业商贸职业学院 | Machining method for preventing roundness of bearing hole of bearing pedestal from being poor in locking state |
-
2022
- 2022-09-26 CN CN202211176295.9A patent/CN115647854B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100921902B1 (en) * | 2008-04-14 | 2009-10-14 | 삼익정공(주) | A Round Shaft Support Manufacturing Method in the Linear Bushing and the Round Shaft Support manufactured by Its Method |
| CN102152075A (en) * | 2011-03-18 | 2011-08-17 | 威尔机械江苏有限公司 | Method for processing bearing pedestal of continuous casting machine |
| CN103769805A (en) * | 2013-12-20 | 2014-05-07 | 柳州正菱集团有限公司 | Method for machining bearing support face of automobile intermediate shaft |
| CN106514158A (en) * | 2016-12-26 | 2017-03-22 | 中国科学院光电技术研究所 | Precision machining method for high-precision U-shaped low-rigidity bearing block type parts |
| CN106838019A (en) * | 2017-01-23 | 2017-06-13 | 赵艳蕊 | Water supply pumping plant bearing block and renovation technique |
| CN207673722U (en) * | 2018-01-08 | 2018-07-31 | 长沙中传航空传动有限公司 | A kind of rigid bearing bearing lubrication system |
| CN111250929A (en) * | 2020-01-18 | 2020-06-09 | 浙江农业商贸职业学院 | Machining method for preventing roundness of bearing hole of bearing pedestal from being poor in locking state |
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| CN115647854A (en) | 2023-01-31 |
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