CN109604957A - A kind of processing method of the open thin-wall titanium alloy part of high-precision configuration - Google Patents
A kind of processing method of the open thin-wall titanium alloy part of high-precision configuration Download PDFInfo
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- CN109604957A CN109604957A CN201811537190.5A CN201811537190A CN109604957A CN 109604957 A CN109604957 A CN 109604957A CN 201811537190 A CN201811537190 A CN 201811537190A CN 109604957 A CN109604957 A CN 109604957A
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- titanium alloy
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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
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Abstract
The present invention relates to a kind of processing methods of the open thin-wall titanium alloy part of high-precision configuration.The present invention passes through reasonable process route: from casting and forming, roughing shape, subzero treatment, arriving semifinishing shape, via hole and hole processing, subzero treatment, finally arrives finishing, realize the processing of the open thin-wall titanium alloy part of high-precision configuration.The present invention uses heat treatment mode of the subzero treatment as part, parameter is determined by engineer testing, part is put into deep cold treatment apparatus, it is filled with liquid nitrogen, reaches -80 DEG C, -180 DEG C stage by stage, slowly heating again after impregnating two hours respectively, it so recycles twice, its toughness and cutting ability can be improved on the basis of not reducing titanium alloy original hardness, part internal stress is more thoroughly removed in the case where deflection is small, guarantees the precision of part.
Description
Technical field
The present invention relates to a kind of processing method of the open thin-wall titanium alloy part of high-precision configuration, belong to formed product and
Processing technique field.
Background technique
Raising with harsh operating condition to element precision and stability requirement, corresponding technology are also complicated day by day.?
Such problems is frequently encountered when processing some parts in irregular shape, structure opening formula: after the completion of each procedure, zero
Part can all have the generation of the case where deformation, and not only size can change, and location and shape tolerance is also difficult to control.Solve such ask
Topic, is all to take multi-step process in the past, reduces the processing capacity of every procedure, and increases after every procedure and be heat-treated together
Process, to eliminate machining stress.This mode part big for machining allowance necessarily has the drawback that process is more, the period is long.And
And for the titanium alloy component of thin-walled, structure opening, after each heat treatment procedure, due to machining stress release and structure opening,
Deflection is all bigger.Even if the very little that last surplus is stayed, it is interior in the desired range not can guarantee deflection yet.So carrying out
Technology method is grasped in the research of the deformed Control Technology of thin-walled, structure opening formula titanium alloy component, improves components
The performance of stability and equipment is extremely urgent.
It is well known that the principal element for influencing part size stability is the size and heterogeneous microstructure of residual stress
Stability, if residual stress is big in process, microstructure is unstable, it will cause part macro-size to generate larger
Variation.General manufacturing process is difficult to control the change of part by way of changing part material heterogeneous microstructure
Shape, solving the more feasible method of problems is using reasonable heat treatment mode and process route.
Summary of the invention
The object of the present invention is to provide a kind of processing methods suitable for the open thin-wall titanium alloy part of high-precision configuration.
A kind of processing method of the open thin-wall titanium alloy part of high-precision configuration, using casting and forming-roughing shape-
Subzero treatment-semifinishing shape-via hole and screw thread process-subzero treatment-finishing process route, specifically include step:
(1) parts of Casting drawing requirement mo(u)lded piece is pressed；
(2) shape major part surplus is tentatively removed with vertical machining centre, boring pin hole is bored, after pinhole positioning on lathe
Remove inner hole major part surplus；
(3) it puts the workpiece in deep cold treatment apparatus and carries out subzero treatment；
(4) the non-key shape of part is processed to final size with vertical machining centre；
(5) faying face is ground, boring pin hole is bored, guarantees that two pieces is consistent, uses lathe semifinishing inner hole after pinhole positioning；
(6) with vertical type optical boring and milling machine processing two sides via hole and thread Pilot hole, pincers worker tapping deburring processing；
(7) it puts the workpiece in deep cold treatment apparatus and carries out subzero treatment；
(8) faying face is ground, boring pin hole is bored, guarantees that two pieces is consistent, Combined machining inner hole is adopted to size after pinhole positioning
Crucial plane is ground with dedicated grinding tool, reaches drawing final size, tolerance.
Subzero treatment described in step (3) and (7), refers to and puts the workpiece in deep cold treatment apparatus, is filled with liquid nitrogen, sublevel
Section reaches -80 DEG C, -180 DEG C, and slowly heating, circulation are multiple again after impregnating two hours respectively.
The present invention, as heat treatment mode, overcomes traditional heat treatment method that cannot thoroughly eliminate part using subzero treatment
Internal residual stress generates the shortcomings that moderate finite deformation, can effectively eliminate inside parts residual stress, improves stress distribution and improves
Mechanical property reduces material caused by stress release and deforms, improves the processing quality of part, ensure that part after the process
Dimensional accuracy.
Detailed description of the invention
Fig. 1 is part of embodiment of the present invention polar axis gimbal shaped three dimensional schematic diagram.
Fig. 2, Fig. 3 are part of embodiment of the present invention polar axis gimbal technical requirements figure.
Specific embodiment
The present invention is based on subzero treatments can eliminate material residual stress, improves its mechanical property, before and after the processing material change
The small feature of shape amount, using casting and forming-roughing shape-subzero treatment-semifinishing shape-via hole and screw thread process-depth
Cold treatment-finishing process route realizes the processing of the open thin-wall titanium alloy part of high-precision configuration.
The technical solution of the invention is as follows, by parts of Casting drawing requirement mo(u)lded piece；It is preliminary with vertical machining centre
Shape major part surplus is removed, boring pin hole is bored, removes inner hole major part surplus on lathe after pinhole positioning；It puts the workpiece in
In deep cold treatment apparatus, it is filled with liquid nitrogen, reaches -80 DEG C, -180 DEG C stage by stage, slowly heating again, is followed after impregnating two hours respectively
Ring is twice；The non-key shape of part is processed to final size with vertical machining centre；Faying face is ground, boring pin hole is bored, guarantees two
Part is consistent, and uses lathe semifinishing inner hole after pinhole positioning, stays 0.2mm surplus；Two sides mistake is processed with vertical type optical boring and milling machine
Hole and thread Pilot hole, pincers worker tapping deburring processing；It puts the workpiece in deep cold treatment apparatus, is filled with liquid nitrogen, reach stage by stage-
80 DEG C, -180 DEG C, slowly heating again after impregnating two hours respectively, circulation is twice；Faying face is ground, boring pin hole is bored, guarantees two pieces
It is consistent, Combined machining inner hole grinds crucial plane using dedicated grinding tool, it is final to reach drawing to size after pinhole positioning
Size, tolerance.
As figure illustrates how the solution of the present invention and purpose are realized referring to Figure of description.
(1) as shown in Figure 1, casting axis gimbal by parts of Casting drawing requirement；
(2) as shown in Figures 2 and 3, with reference to outer circle Φ 162, center line is drawn.On the basis of the face E, the face A, F made allowance is milled.With A
On the basis of face, the face E, C and 206 both ends of the surface made allowances are milled.
(3) cylindrical milling Φ 162 arrives size.43.5/2,40/2 both ends of the surface are milled to size.It is contour light-exposed to mill the 72/2 two sides face M.
Boring and twisting 8 pin hole of 2- Φ is that Φ 6 sells hole directly to households, and is respectively counterbore Φ 9.5 deep 15 in two pieces outer end.On the basis of the face C, boring inner holeMade allowance, 35 made allowance of boring Φ mill Spherical Surface S R108, cylinder R107 made allowance.
Deburring, sharp edge are blunt.
(4) subzero treatment is put the workpiece in deep cold treatment apparatus, is filled with liquid nitrogen, reaches -80 DEG C, -180 DEG C stage by stage,
Slowly heating again after impregnating two hours respectively, circulation is twice.
(5) face E made allowance is milled, the face E is ground and guarantees flatness < 0.005.On the basis of the face E, the face C made allowance, guarantee and E are milled
The face depth of parallelism < 0.02.206 both ends of the surface made allowances are milled, are milledMade allowance.It is 1.5 × 45 ° deep to mill the face C root undercut wide 2.Boring
Inner hole ΦMade allowance, orifice chamfer.Deburring, sharp edge are blunt.
(6) the 157 liang of wedge angle roots boring Φ stay fillet R3 to size, vehicle 150.9 to size.Vehicle Made allowance.The face F is to upper poor (130 made allowance of overall length), sharp edge chamfering.
(7) it splits, sharp edge chamfering.The face E is ground, guarantees flatness < 0.003.
(8) after two pieces combination, boring pin hole grinds the face A, guarantees flatness < 0.003.On the basis of the face A, spherical surface in milling
Size is arrived in SR195 ± 0.1, and u-turn mills lower peripheral surface SR108, cylinder R107 to size.Boring Φ 35 arrives size, boring R18 to size.
(9) subzero treatment is put the workpiece in deep cold treatment apparatus, is filled with liquid nitrogen, reaches -80 DEG C, -180 DEG C stage by stage,
Slowly heating again after impregnating two hours respectively, circulation is twice.
(10) deburring, sharp edge are blunt；The face E is ground, guarantees flatness < 0.003.
(11) on the basis of the face E, the milling face C (at two) is light-exposed, grinds the face C < 0.004 parallel and contour with the face E.Two pieces combination
Afterwards, centering, boring pin hole.It is symmetrical with 206 both ends of the surface on the basis of the face C, bore 5-M6 bottom outlet, guarantee size 193.5 ± 0.1,9.5,
70±0.1,44±0.1.2-M4 bottom outlet is bored, is guaranteed in size 193.5 ± 0.1 (outside)；It bores 2- Φ 6.5 and guarantees back gauge 25.With the face C
On the basis of, it bores 4- Φ 6.5 and leads to counterbore Φ 11 deep 20, guarantee size 193.5 ± 0.1,25,85 ± 0.1.It is logical heavy to bore 6 pin hole of 2- Φ
Hole Φ 8 deep 15.Guarantee size 193.5 ± 0.1,20 ± 0.1.
(12) sharp edge chamfering.Attack 5-M6,2-M4.The face C is ground, guarantees flatness < 0.003.
(13) on the basis of the face C, boring inner holeMade allowance.0.5 × 45 ° of orifice chamfer.In the circle of R80 ± 0.1
On, it is uniformly distributed to bore 2-M4 bottom outlet deep 15.The positioning of the face A, milling 206 to upper difference.Milling boss at two guarantees center away from 86.And bore 4-M5 bottom outlet
It is logical to guarantee position dimension.At 206 both ends, 4-M4 bottom outlet depth 6+3,4-M3 bottom outlet deep 8 is bored respectively.
(14) chamfering deburring attacks 4-M5,4-M4,4-M3.Attack 2-M4.
(15) on the basis of the face A, vehicleMade allowance.F meets personally light, sharp edge chamfering.
(16) two pieces is dismantled, subzero treatment is put the workpiece in deep cold treatment apparatus, is filled with liquid nitrogen, reaches -80 stage by stage
DEG C, -180 DEG C, respectively impregnate two hours after again slowly heating, circulation twice.
(17) face E is ground, guarantees flatness < 0.002.
(18) boring taper pin-hole Φ 8 arrives size.0.8 × 45 ° of the face A orifice chamfer.
(19) align reaming pin, is consistent 85%.The face A is ground, guarantees flatness < 0.002.Chamfering deburring.
(20) on the basis of the face A, millingTwo sides and stage body frame match the gap 0.02-0.04, guarantee depth of parallelism < 0.005,
⊥0.02A、⊥0.02C。
(21) on the basis of the face A, boring inner holeTo size.Guarantee axially bored line
B-D is vertical with the face A less than 0.005.
(22) face C is ground, guarantees coplanar < 0.004, < 0.005 vertical with the face A at two.
(23) datum level identifies, the center E- faying face, 150 outer end face of F- Ф, M-72 lateral surface.
Claims (2)
1. a kind of processing method of the open thin-wall titanium alloy part of high-precision configuration, which is characterized in that thick using casting and forming-
Shape-subzero treatment-semifinishing shape-via hole and screw thread process-subzero treatment-finishing process route are processed, specifically
Comprising steps of
(1) parts of Casting drawing requirement mo(u)lded piece is pressed；
(2) shape major part surplus is tentatively removed with vertical machining centre, is bored boring pin hole, is removed on lathe after pinhole positioning
Inner hole major part surplus；
(3) it puts the workpiece in deep cold treatment apparatus and carries out subzero treatment；
(4) the non-key shape of part is processed to final size with vertical machining centre；
(5) faying face is ground, boring pin hole is bored, guarantees that two pieces is consistent, uses lathe semifinishing inner hole after pinhole positioning；
(6) with vertical type optical boring and milling machine processing two sides via hole and thread Pilot hole, pincers worker tapping deburring processing；
(7) it puts the workpiece in deep cold treatment apparatus and carries out subzero treatment；
(8) faying face is ground, boring pin hole is bored, guarantees that two pieces is consistent, Combined machining inner hole is to size after pinhole positioning, using special
Crucial plane is ground with grinding tool, reaches drawing final size, tolerance.
2. a kind of processing method of the open thin-wall titanium alloy part of high-precision configuration according to claim 1, feature
It is, subzero treatment described in step (3) and (7) refers to and puts the workpiece in deep cold treatment apparatus, is filled with liquid nitrogen, stage by stage
- 80 DEG C, -180 DEG C are reached, slowly heating, circulation are multiple again after impregnating two hours respectively.
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Cited By (5)
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| CN111318855A (en) * | 2019-11-07 | 2020-06-23 | 沈阳铸造研究所有限公司 | Method for machining cylindrical part |
| CN112192162A (en) * | 2020-10-13 | 2021-01-08 | 上海科力机械制造有限公司 | Processing technology of side plate of printing machine |
| CN112404898A (en) * | 2020-11-05 | 2021-02-26 | 苏州凯盛仪表科技有限公司 | Machining method of thin-wall part |
| CN113399700A (en) * | 2021-05-11 | 2021-09-17 | 安徽涌诚机械有限公司 | High-precision wind power brake machining process |
| CN114248067A (en) * | 2021-11-15 | 2022-03-29 | 航天科工哈尔滨风华有限公司 | Method for processing high-hardness thin-wall stainless steel plate type control surface |
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Cited By (6)
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| CN113399700A (en) * | 2021-05-11 | 2021-09-17 | 安徽涌诚机械有限公司 | High-precision wind power brake machining process |
| CN114248067A (en) * | 2021-11-15 | 2022-03-29 | 航天科工哈尔滨风华有限公司 | Method for processing high-hardness thin-wall stainless steel plate type control surface |
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