CN106514158A - Precision machining method for high-precision U-shaped weak-rigidity bearing seat type parts - Google Patents
Precision machining method for high-precision U-shaped weak-rigidity bearing seat type parts Download PDFInfo
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- CN106514158A CN106514158A CN201611214900.1A CN201611214900A CN106514158A CN 106514158 A CN106514158 A CN 106514158A CN 201611214900 A CN201611214900 A CN 201611214900A CN 106514158 A CN106514158 A CN 106514158A
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- 238000003754 machining Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009434 installation Methods 0.000 claims abstract description 11
- 230000005489 elastic deformation Effects 0.000 claims abstract description 10
- 238000012937 correction Methods 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 7
- 206010044565 Tremor Diseases 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 238000012797 qualification Methods 0.000 abstract description 4
- 230000035882 stress Effects 0.000 abstract 4
- 230000032683 aging Effects 0.000 abstract 2
- 238000012360 testing method Methods 0.000 description 5
- 108700041286 delta Proteins 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
Classifications
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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
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The invention discloses a precision machining method of high-precision U-shaped weak-rigidity bearing seat parts, which comprises the following steps: 1. preparing materials; 2. rough machining processes and shapes the part, and machining allowances are left in all the shapes; 3. removing residual stress generated by rough machining by stress relief aging; 4. semi-finishing, namely, reserving machining allowance for important installation connecting holes except for an assembly reference surface, the installation holes of the bearing and the end surfaces of the installation holes, and enabling all other machining characteristics to meet the size requirement; 5. removing residual stress generated by semi-finishing by stress relief and aging again; 6. and finishing the assembly reference surface, the mounting hole of the bearing and the end surface thereof, and an important mounting connecting hole. In the process, the principle that the reference is unified and the reference is advanced is adopted, an auxiliary tool is designed to reduce the vibration and improve the rigidity of the part, and meanwhile, the influence of elastic deformation in machining is considered in the control of the center height, and a certain correction margin is reserved. The invention ensures the qualification rate of high-precision U-shaped weak-rigidity bearing seat parts.
Description
Technical field
The invention belongs to precise machine machining field, and in particular to a kind of high accuracy U-shaped weak separation bearing block class zero
The precision machining method of part.
Background technology
High accuracy U-shaped weak separation bearing block class part is widely used in Aerospace Products, and which is mainly characterized by：Precision
High, poor rigidity, it is lightweight.Conventional material mainly has aluminium alloy, titanium alloy etc. at present.
The main precision index of such part is generally included：
First, the circularity of two bearings installing hole, cylindricity, axiality and size；
Second, two bearings install the depth of parallelism of axially bored line and component assembly datum level；
3rd, two bearings install axially bored line to component assembly datum level apart from size；
4th, two bearings install the perpendicularity that hole end surface and two bearings install axially bored line；
5th, two bearings install the depth of parallelism of hole end surface；
6th, the flatness of component assembly datum level.
Precision machined technical difficult points are that, due to part poor rigidity, in processing, elastic deformation is big, and part is trembled
Seriously, actual cut amount is caused to be difficult to accurately control, and actual cut amount skewness, so as to cause size, the shape of part
Position precision is difficult to ensure that part qualification rate is low.
Based on above technological difficulties, the precision machining method of high accuracy U-shaped weak separation bearing block class part how is solved, is carried
High part qualification rate, becomes and is engaged in precision machined technologists urgent problem.
The content of the invention
The technical problem to be solved in the present invention is：Solve the Precision Machining side of high accuracy U-shaped weak separation bearing block class part
Method, improves part qualification rate.
For achieving the above object, the present invention is realized by below scheme：
A kind of precision machining method of high accuracy U-shaped weak separation bearing block class part, the part shape are U-shaped, and
Including following important size, the accuracy of form and position：The high AA in center,WithThe axiality of common axis,WithThe axiality of common axis, face C withThe perpendicularity of common axis, face D with It is public
The perpendicularity of axis, the depth of parallelism of face C and face D, face E withThe depth of parallelism of axis, the method include following processing step
Suddenly：
Step 1), get the raw materials ready.
Step 2), roughing, part is shaped, all profiles leave allowance, margin range one side and half
1～3mm of footpath.
Step 3), destressing timeliness, according to heat treatment relevant criterion, remove the residual stress that roughing is produced.
Step 4), semifinishing, the processing each feature of part, wherein E faces,And C faces, D faces, important installation connection
Allowance is left in hole, and 0.2～0.5mm of margin range one side and radius, remaining machining feature reach dimensional requirement.
Step 5), destressing timeliness again, according to heat treatment relevant criterion, remove the residual stress that semifinishing is produced.
Step 6), polish E faces,And C faces, D faces, important installation connecting hole.Take benchmark in advance, benchmark system
One principle, and Design assistant frock reduce tremble, improve detail rigidity, while high size AA in center stays second-order correction surplus.
Wherein, the step 6) E faces for part assembling base plane,And C faces, the installation that D faces are bearing
Hole and its positioning end face, AA are distance of the bearing mounting hole axis to component assembly datum level.
Wherein, the high accuracy includes dimensional accuracy and the accuracy of form and position, and dimensional accuracy includes the size of two bearings installing hole
And two bearings install axially bored line to component assembly datum level apart from size；The accuracy of form and position includes the coaxial of two bearings installing hole
Degree, component assembly datum level install the depth of parallelism of axially bored line with two bearings, and two bearings are installed hole end surface and install hole axle with two bearings
The perpendicularity of line, two bearings install the depth of parallelism of hole end surface.Wherein, dimensional accuracy≤0.02mm, the accuracy of form and position≤0.03mm.
Wherein, the step 6) take benchmark leading principle polish E faces first up to size, the accuracy of form and position require, so
Afterwards using unifying datum, i.e. machining benchmark and the unified principle of reference for assembling, positioned with E faces, polishAnd C faces,
D faces, important installation connecting hole.
Wherein, the step 6) Design assistant frock reduces that to tremble, improve detail rigidity filled out using soft vibration-absorbing material
U-shaped inner chamber is filled, while U-shaped inner chamber top has been supported using lightweight but length-adjustable non-yielding prop frock, and applies appropriate
Reversal deformation amount compensating the impact of elastic deformation in the course of processing.
Wherein, when the size for applying reversal deformation amount on U-shaped inner chamber top does not about apply the processing of reversal deformation amount
1/3 times of part top elastic deformation value.
Wherein, the step 6) high size AA in center stays second-order correction surplus is right boringKong Shi, first by AA
Size adds 0.003mm size Control by upper difference to upper difference, treats that boring is completeBehind hole and its C, D face, then precise finiss E faces
With ensure AA sizes and E faces withThe depth of parallelism of axis.
The present invention has advantages below：
Firstth, detail rigidity is improve by design specialized frock, while reduce trembling in the part course of processing asking
Topic；
Secondth, part elastic deformation is compensate in the course of processing to chi by applying reversal deformation amount on U-shaped inner chamber top
The impact of the very little, accuracy of form and position；
3rd, by center high size AA is stayed second-order correction surplus, last precise finiss E faces, to ensure AA sizes and E
Face withThe depth of parallelism of axis, it is to avoid due to AA dimension overproofs that part elastic deformation causes in the course of processing.
Description of the drawings
Fig. 1 is the targeted part type sketch of the present invention and contained feature；
Fig. 2 is the front view of experimental piece in the specific embodiment of the invention；
Fig. 3 is the graphics of experimental piece in the specific embodiment of the invention；
Fig. 4 is the supporting figure of half right boring inner chamber auxiliary mould of experimental piece in the specific embodiment of the invention, and wherein, 1 is soft
Material, 2 is workpiece；
Fig. 5 is the supporting figure of experimental piece right boring inner chamber auxiliary mould in the specific embodiment of the invention, and wherein, 1 is soft material
Material, 2 is workpiece, and 3 is adjustable length non-yielding prop；
Fig. 6 is experimental piece testing result in the specific embodiment of the invention, and wherein, Fig. 6 (a) is 2# experimental piece testing results,
Fig. 6 (b) is 3# experimental piece testing results, and Fig. 6 (c) is 4# experimental piece testing results.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment is further elaborated to the present invention.
Refer to the attached drawing 1, a kind of precision machining method of high accuracy U-shaped weak separation bearing block class part mainly include as follows
Procedure of processing：
Step 1), get the raw materials ready.
Step 2), roughing, part is shaped, all profiles leave allowance, margin range one side and half
1～3mm of footpath.
Step 3), destressing timeliness, according to heat treatment relevant criterion, remove the residual stress that roughing is produced.
Step 4), semifinishing, the processing each feature of part, wherein E faces,And C faces, D faces, important installation connection
Allowance is left in hole, and 0.2～0.5mm of margin range one side and radius, remaining machining feature reach dimensional requirement.
Step 5), destressing timeliness again, according to heat treatment relevant criterion, remove the residual stress that semifinishing is produced.
Step 6), polish E faces,And C faces, D faces, important installation connecting hole.Take benchmark in advance, benchmark system
One principle, and Design assistant frock reduce tremble, improve detail rigidity, while high size AA in center stays second-order correction surplus.
Wherein, assembling base plane of the E faces for part,And C faces, D faces are the installing hole of bearing and its fixed
Position end face, AA are distance of the bearing mounting hole axis to component assembly datum level.
Wherein, the high accuracy includes dimensional accuracy and the accuracy of form and position, and dimensional accuracy includes the size of two bearings installing hole
And two bearings install axially bored line to component assembly datum level apart from size；The accuracy of form and position includes the coaxial of two bearings installing hole
Degree, component assembly datum level install the depth of parallelism of axially bored line with two bearings, and two bearings are installed hole end surface and install hole axle with two bearings
The perpendicularity of line, two bearings install the depth of parallelism of hole end surface.Wherein, dimensional accuracy≤0.02mm, the accuracy of form and position≤0.03mm.
Wherein, the leading principle of benchmark polish E faces first are required up to size, the accuracy of form and position, then using benchmark
Unification, i.e. machining benchmark and the unified principle of reference for assembling, are positioned with E faces, polishAnd C faces, D faces, important peace
Dress connecting hole.
Wherein, it is using in soft vibration-absorbing material filling U-shaped that the Design assistant frock reduction is trembled, improves detail rigidity
Chamber, while having supported U-shaped inner chamber top using lightweight but length-adjustable non-yielding prop frock, and applies appropriate reverse change
Shape amount is compensating the impact of elastic deformation in the course of processing.
Wherein, when the size for applying reversal deformation amount on U-shaped inner chamber top does not about apply the processing of reversal deformation amount
1/3 times of part top elastic deformation value.
Wherein, it is right boring that high size AA in the center stays second-order correction surplusAA sizes are pressed by Kong Shi first
Upper difference adds about 0.003mm size Control to upper difference, treats that boring is completeBehind hole and its C, D face, then precise finiss E faces are ensureing
AA sizes and E faces withThe depth of parallelism of axis.
Specific embodiment is as follows：
High accuracy U-shaped weak separation Process for Bearing Seat as shown in accompanying drawing 2,3, material is TC4R, its precision machining method bag
Include following steps：
Step 1), get the raw materials ready；
Step 2), roughing, part is shaped, all profile one sides and radius made allowance 2mm；
Step 3), vacuum destressing timeliness；
Step 4), semifinishing, the processing each feature of part, wherein 51 ± 0.01 lower surfaces, at twoHole,Both ends of the surface,Four side one sides and radius made allowance 0.4mm, at two, 8-M2-7H is not processed, and remaining is special
Processing is levied up to figure dimensional requirement；
Step 5), vacuum destressing timeliness；
Step 6), operation 1：51 ± 0.01 lower surface of right boring,Four Bian Datu dimensional requirements, it is ensured that：51
± 0.01 lower surface flatness≤0.01mm；As shown in Figure 4, with the supporting U-shaped inner chamber of auxiliary mould, at right boring two
Hole,Both ends of the surface one side and radius made allowance 0.1mm, wherein：51 ± 0.01 size Control are within 51 ± 0.03；Bore two
8-M2-7H bottom outlets in place are required up to figure；
Step 7), operation 2：Attack 8-M2-7H silks hole at two；
Step 8), operation 3：51 ± 0.01 lower surface of precise finiss, it is ensured that：Flatness≤0.002mm；
Step 9), operation 4- work step 1：As shown in Figure 5, with the supporting U-shaped inner chamber of auxiliary mould, installation process lever
Table is monitoredBoth ends of the surface, it is ensured that do not apply reversal deformation；
Step 10), operation 4- work step 2：At right boring twoHole,Both ends of the surface one side and radius made allowance
0.05～0.08mm, wherein：51 ± 0.01 size Control are in 51.01～51.013mm scopes；
Step 11), operation 4- work step 3：It is in place with drop-down on lever meterBoth ends of the surface, record upper and lower difference DELTA 1, Δ
2；
Step 12), operation 4- work step 4：Monitored with lever meterBoth ends of the surface, the adjustable non-yielding prop work of adjustment length
Dress, makesBoth ends of the surface reversal deformation, deflection are (Δ 1+ Δs 2)/6；
Step 13), operation 4- work step 5：At right boring twoHole,Both ends of the surface reach figure dimensional requirement, wherein：
51 ± 0.01 size Control are in 51.010～51.013mm scopes；
Step 14), operation 5：51 ± 0.01 sizes of inspection, record detected value；
Step 15), operation 6：According to detected value, 51 ± 0.01 lower surface of precise finiss reaches figure dimensional requirement；
Step 16), operation 7：Each size, the accuracy of form and position is examined, detected value is recorded.
Through above-mentioned procedure of processing, part processing is successfully completed, 2#, 3#, 4# piece test result is as shown in Figure 6.
Non-elaborated part of the present invention belongs to techniques well known.
The above, part specific embodiment only of the present invention, but protection scope of the present invention is not limited thereto, and appoints
What those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.
Claims (7)
1. a kind of precision machining method of high accuracy U-shaped weak separation bearing block class part, the part shape are U-shaped, and are wrapped
Include following important size, the accuracy of form and position：The high AA in center,WithThe axiality of common axis,WithThe axiality of common axis, face C withThe perpendicularity of common axis, face D with It is public
The perpendicularity of axis, the depth of parallelism of face C and face D, face E withThe depth of parallelism of axis, it is characterised in that mainly include as
Lower procedure of processing：
Step 1), get the raw materials ready；
Step 2), roughing, part is shaped, all profiles leave allowance, margin range one side and radius 1～
3mm；
Step 3), destressing timeliness, according to heat treatment relevant criterion, remove the residual stress that roughing is produced；
Step 4), semifinishing, the processing each feature of part, wherein E faces,And C faces, D faces, important installation connecting hole stays
There is allowance, 0.2～0.5mm of margin range one side and radius, remaining machining feature reach dimensional requirement；
Step 5), destressing timeliness again, according to heat treatment relevant criterion, remove the residual stress that semifinishing is produced；
Step 6), polish E faces,And C faces, D faces, important installation connecting hole, take benchmark leading, unifying datum
Principle, and Design assistant frock reduce tremble, improve detail rigidity, while high size AA in center stays second-order correction surplus.
2. the precision machining method of a kind of high accuracy U-shaped weak separation bearing block class part according to claim 1, its feature
Be, the significant dimensions precision≤0.02mm, the important accuracy of form and position≤0.03mm.
3. the precision machining method of a kind of high accuracy U-shaped weak separation bearing block class part according to claim 1, its feature
It is, assembling base plane of the E faces for part,And C faces, the installing hole that D faces are bearing and its positioning end face,
AA is that two bearings install axially bored line to the distance of component assembly datum level.
4. the precision machining method of a kind of high accuracy U-shaped weak separation bearing block class part according to claim 1, its feature
It is, the step 6) the principle polish E faces first of taking benchmark leading are required up to size, the accuracy of form and position, then using base
Quasi- unification, i.e. machining benchmark and the unified principle of reference for assembling, are positioned with E faces, polishAnd C faces, D faces, it is important
Connecting hole is installed.
5. the precision machining method of a kind of high accuracy U-shaped weak separation bearing block class part according to claim 1, its feature
Be, the step 6) Design assistant frock reduce tremble, improves detail rigidity be using soft vibration-absorbing material fill U-shaped in
Chamber, while having supported U-shaped inner chamber top using lightweight but length-adjustable non-yielding prop frock, and applies appropriate reverse change
Shape amount is compensating the impact of elastic deformation in the course of processing.
6. the precision machining method of a kind of high accuracy U-shaped weak separation bearing block class part according to claim 1, its feature
It is, the step 6) high size AA in center stays second-order correction surplus is right boringKong Shi, first by AA sizes by upper
Difference adds about 0.003mm size Control to upper difference, treats that boring is completeBehind hole and its C, D face, then precise finiss E faces are ensureing AA
Size and E faces withThe depth of parallelism of axis.
7. the precision machining method of a kind of high accuracy U-shaped weak separation bearing block class part according to claim 5, its feature
It is that the size for applying reversal deformation amount on U-shaped inner chamber top does not about apply part top when reversal deformation amount is processed
1/3 times of elastic deformation value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611214900.1A CN106514158B (en) | 2016-12-26 | 2016-12-26 | Precision machining method for high-precision U-shaped weak-rigidity bearing seat type parts |
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|---|---|---|---|
| CN201611214900.1A CN106514158B (en) | 2016-12-26 | 2016-12-26 | Precision machining method for high-precision U-shaped weak-rigidity bearing seat type parts |
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| Publication Number | Publication Date |
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| CN106514158A true CN106514158A (en) | 2017-03-22 |
| CN106514158B CN106514158B (en) | 2019-06-11 |
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| CN201611214900.1A Active CN106514158B (en) | 2016-12-26 | 2016-12-26 | Precision machining method for high-precision U-shaped weak-rigidity bearing seat type parts |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111889717A (en) * | 2020-06-30 | 2020-11-06 | 成都飞机工业（集团）有限责任公司 | High-precision bearing mounting hole machining method based on three-coordinate machine tool |
| CN115446550A (en) * | 2022-09-28 | 2022-12-09 | 陕西飞机工业有限责任公司 | Method for machining U-shaped positioning piece of aircraft standard tool |
| CN115647854A (en) * | 2022-09-26 | 2023-01-31 | 长沙中传航空传动有限公司 | Machining method for bearing support bushing hole |
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| CN106002110A (en) * | 2016-08-03 | 2016-10-12 | 泉州市德源轴承实业有限公司 | Machining method for bearing seat |
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| US5774984A (en) * | 1993-07-07 | 1998-07-07 | Koyo | Method of manufacturing a rocker arm |
| CN102350617A (en) * | 2011-09-08 | 2012-02-15 | 中国航空工业第六一八研究所 | Method for processing high-accuracy easily-deformable U-shaped cantilever structural member |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111889717A (en) * | 2020-06-30 | 2020-11-06 | 成都飞机工业（集团）有限责任公司 | High-precision bearing mounting hole machining method based on three-coordinate machine tool |
| CN111889717B (en) * | 2020-06-30 | 2021-12-10 | 成都飞机工业（集团）有限责任公司 | High-precision bearing mounting hole machining method based on three-coordinate machine tool |
| CN115647854A (en) * | 2022-09-26 | 2023-01-31 | 长沙中传航空传动有限公司 | Machining method for bearing support bushing hole |
| CN115647854B (en) * | 2022-09-26 | 2024-04-02 | 长沙中传航空传动有限公司 | Machining method for bearing support sleeve hole |
| CN115446550A (en) * | 2022-09-28 | 2022-12-09 | 陕西飞机工业有限责任公司 | Method for machining U-shaped positioning piece of aircraft standard tool |
| CN115446550B (en) * | 2022-09-28 | 2023-11-21 | 陕西飞机工业有限责任公司 | Machining method for U-shaped locating piece of aircraft standard tool |
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