CN110102989A - A kind of VTR series booster compression impellor processing method and its cutting tool - Google Patents
A kind of VTR series booster compression impellor processing method and its cutting tool Download PDFInfo
- Publication number
- CN110102989A CN110102989A CN201910475317.3A CN201910475317A CN110102989A CN 110102989 A CN110102989 A CN 110102989A CN 201910475317 A CN201910475317 A CN 201910475317A CN 110102989 A CN110102989 A CN 110102989A
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- impeller
- face
- smart car
- axial bore
- vtr
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/103—Retention by pivotal elements, e.g. catches, pawls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- 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
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
Abstract
The present invention provides a kind of VTR series booster compression impellor processing method and its cutting tool, comprising steps of a. impeller center axle inward hole；B. it is heat-treated；C. turning impeller end face and outer circle；D. turning impeller small end and impeller axial bore, while ring of materialsing on impeller；E. it examines；F. rough turn impeller small end；G. half smart car impeller big end, small end, impeller meridian plane and impeller axial bore；H. blade and runner are milled；I. smart car impeller big end outer circle；J. smart car impeller big end and impeller axial bore；K. impeller clamping is positioned at cutting tool, impeller positioning surface used in smart car next procedure；L. smart car impeller big end and impeller axial bore；M. smart car impeller small end end face；N. smart car impeller meridian plane and vane end faces.This method improves the cooperation precision and leakproofness between impeller large end face and gas sealing strip, solve original sample ring it is seperated with impeller after be heat-treated, the problem of sample ring cannot really reflect performance condition after part is heat-treated.
Description
Technical field
The present invention relates to the engines of ship, naval vessels to manufacture processing technique field, specially a kind of VTR series booster pressure
Gas Impeller Machining method.
Background technique
Currently, China's shipping industry is grown rapidly with the variation of international situation, the market share is kept world-leadingly
Position.Ship major impetus device is diesel engine, and important component of the booster as diesel engine, technical level directly affects peculiar to vessel
The working efficiency of diesel engine.
Core component of the compression impellor as VTR series charger product, key part, as shown in Figure 1, the part is mounted in
The left end of rotor acts as high speed rotation with rotor portions set one when work, the assembly having higher requirements between this part and surrounding components
And cooperation, there are stringent cooperation and air seal between especially big transverse plane and gas sealing strip, more to meet machine at high speeds operating
Need of work, part large end face have higher dimensional accuracy and the accuracy of form and position, especially end face run-out requirement, meeting when otherwise working
Grazing, damage mating parts, very cause that rotor portions set can be damaged, and cause the accident such as Fig. 2, and the large end face face of this part is big, wall is thin,
It is more demanding, it is difficult to reach, work in-process is easy to appear following problems；
1, part large end face before processing, needs to carry out clamping centering end face run-out within 0.03mm, since clamping is fixed
Plane is uneven, large end face and positioning surface are not parallel etc., and centering requirement is not achieved after clamping in its natural state in part, causes to operate
Person taps part by force, and the high point on part when centering is lower, and low spot is got higher, to reach required end face centering value
0.03mm, to form clamping internal stress, end face is completed the process, and removes external force clamping, and part is restored under natural conditions, end face
On size and the accuracy of form and position will vary widely, Design Requirement Drawing is not achieved.
2, when being heat-treated, part is seperated with sample ring to be carried out, domain of the existence difference when being heat-treated in furnace, and heating speed is fast
Slowly, time order and function, cooling etc. are all not exclusively the same, and sample ring cannot be truly reflected the heat treatment situation of part completely, can not
The true heat treatment requirements for guaranteeing part.
3, the quantity of sampling quantity every batch of of sample ring only takes 1, does not meet quality control requirement and inspection specification.
4, part cooperation processing, costly, manufacturing schedule not can control, and not be able to satisfy the customer requirement time.
5, without processing experience successfully for reference.
Summary of the invention
For in the prior art, impeller large end face finished size precision and the accuracy of form and position are unable to reach design requirement, examination
Sample ring is seperated with impeller to be heat-treated, and whether the mechanical performance after cannot really reflecting impeller heat treatment, which meets standard criterion, is wanted
Technical problems, the present invention such as ask to provide a kind of VTR series booster compression impellor processing method, the leaf processed by this method
Size of wheel precision and the accuracy of form and position can reach product design requirement, improve the cooperation essence between impeller large end face and gas sealing strip
Degree and leakproofness improve former heat treatment process, manage by sample ring and impeller consubstantiality, with furnace treatment, are heat-treated after solving fission,
Sample ring cannot completely, really reflect part heat treatment after performance condition the problem of.
Technical solution of the present invention is as follows:
A kind of cutting tool for VTR series booster compression impellor, the clamping including pedestal and set on pedestal one end
Block, is vertically equipped with the stepped hole being fixedly connected with machine chuck on the pedestal, cutting tool by stepped hole screw with
Machine chuck is fastenedly connected, and the grip block is equipped with the inner arc surface for clamping impeller large cylindrical, institute towards the side of pedestal
It states cutting tool to be uniformly arranged on machine chuck, is moved radially along machine chuck and clamp impeller.
A kind of VTR series booster compression impellor processing method, comprising the following steps:
A. in impeller center drill carriage axial bore；
B. it is heat-treated；
C. turning impeller end face and outer circle substantially after centering outer circle and end face；
D. turning impeller small end and impeller axial bore substantially after centering outer circle and end face, while materialsing on impeller
Ring；
E. mechanical performance and ultrasonic examination are detected using sample ring as wheel sample piece；
F. flat impeller big end end face, rough turn impeller small end are leaned on；
G. half smart car impeller big end, small end, impeller meridian plane and impeller axial bore；
H. impeller semi-finished product Set and Positioning is milled into blade and runner in milling tool；
I. impeller semi-finished product are clamped in vehicle core shaft, smart car impeller big end outer circle；
J. centering sealing gland face, centering impeller axial bore, smart car impeller big end and impeller axial bore；
K. on the basis of the big end end face of impeller, planar end surface is leaned on, by impeller clamping in turning work described in claim 1
Have, impeller positioning surface used in smart car next procedure；
L. on the basis of the impeller positioning surface after process k processing, planar end surface, centering impeller axial bore, smart car impeller are leaned on
Big end and impeller axial bore；
M. centering impeller axial bore and impeller big end end face, by drawing smart car impeller small end end face；
N. smart car impeller meridian plane and vane end faces；
Further, in step d with three claw clip outer circles, turning impeller small end end face and impeller axial bore, while in leaf
Wheel small end top is materialsed ring, the sample ring be with impeller it is androgynous, manage and obtain with furnace treatment.
Further, with three claw clip outer circles, rough turn impeller small end end face and periphery in step f.
Further, in step g, including three steps,
G1. soft three-jaw folder outer circle, half smart car impeller big end end face, convex surface and impeller axial bore are used；
G2. soft three-jaw folder outer circle, half smart car impeller small end end face, periphery, annular groove, impeller meridian plane and impeller are used
Axial bore and small end inner bore chamfering, meridian plane reserve allowance；
G3. by impeller clamping in vehicle core shaft, half smart car impeller big end periphery and clamping step；
Further, blade and runner program are milled in step h be divided into rough mill and finish-milling.
Further, in step j, with soft three-jaw folder big end outer circle, centering sealing gland face, centering impeller axial bore, smart car
Impeller big end end face, convex surface and impeller axial bore.
Further, in step l, gently press from both sides large cylindrical with soft three-jaw, lean on flat impeller positioning surface, smart car impeller big end end face,
The gentle cover of convex surface and impeller axial bore.
Further, the sample ring quantity of sampling quantity is true by standard criterion according to the number of every batch of Impeller Machining quantity
Determine quantity of sampling quantity.
It further, further include first dressing part burr, first time impeller single-piece dynamic balancing between step j and k
Test and overspeed test, further include second of cleaning part burr, second of impeller single-piece dynamic balance running after step n.
The beneficial effects of the present invention are:
1, in step l before large end face smart car, increase by one of k step smart car process, it is fixed with plane reliable on large end face
, impeller used in (processing large end face) positions plane in smart car l step, guarantees the flat of impeller positioning surface used in l step
The depth of parallelism of face degree and large end face guarantees that Set and Positioning face is parallel with large end face, so that clamping parts in its natural state are kept,
The centering requirement for reaching 0.03mm, avoids the generation of clamping internal stress.
2, in step k when smart car, design solves common chuck not civilian dress using Special purpose turning tool needed for center lathe
Folder, positioning shakiness, insecure problem, while it being able to achieve the indirect measurement of this process processing dimension again, it is provided for process below
Reliable positioning surface, and reach and look for the requirement of frontoparallel, reliable guarantee is provided for the smooth implementation of process below.
3, the present invention first passes through step b and is heat-treated to part, then passes through ring of materialsing when step d turning, sample ring
It is heat-treated with part consubstantiality, with furnace, realizes the authenticity, identity of the two, by carrying out mechanical performance to sample ring
Detection and ultrasonic examination, can really reflect the heat treatment situation of part completely, efficiently solve sample ring same zero in original process
Part is heat-treated after first carrying out fission, sample ring cannot completely, really reflect part heat treatment after performance condition the problem of.
4, adjust heat treatment sample ring quantity of sampling quantity, according to every batch of Impeller Machining quantity number, by standard criterion
It determines quantity of sampling quantity, solves the drawbacks of every batch of processing only takes 1 sample ring to be detected in prior art, reach quality control
Code requirement processed and quality standard.
5, provide a set of reliable, stable processing method for the processing of VTR series compression impellor, provide use for reference foundation and
With reference to.
Detailed description of the invention
Fig. 1 is compression impellor installation diagram in background technique；
Fig. 2 is the structural schematic diagram of compression impellor；
Fig. 3 is Fig. 2 left view；
Fig. 4 is step c turning process attached drawing；
Fig. 5 is step d turning process attached drawing；
Fig. 6 is the rough turn process drawing of step f；
Fig. 7 is half smart car process drawing of step g1；
Fig. 8 is half smart car process drawing of step g2；
Fig. 9 is half smart car process drawing of step g3；
Figure 10 step h mills process drawing；
Figure 11 is step j smart car process drawing；
Figure 12 is step k smart car process drawing；
Figure 13 is step l smart car process drawing；
Figure 14 is step n smart car process drawing；
Figure 15 is the main view of cutting tool Set and Positioning impeller；
Figure 16 is A direction view in Figure 15；
In attached drawing: 1- impeller；101- impeller big end；102- impeller small end；103- axial bore；104- meridian plane；105-
Convex surface；106- blade；107- impeller positioning surface；108- vane end faces；109- annular groove；110- clamps step；111- sealing gland
Face；2- sample ring；3- cutting tool；301- pedestal；302- grip block；3011- stepped hole；3021- inner arc surface；4- lathe card
Disk.
Specific embodiment
The embodiment of the present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 15, Figure 16, a kind of cutting tool for VTR series booster compression impellor, including 301 He of pedestal
Grip block 302 set on pedestal one end is vertically equipped with the stepped hole 3011 being fixedly connected with machine chuck 4, vehicle on pedestal 301
It cuts tool 3 to be fastenedly connected by stepped hole screw with machine chuck 5, the side of grip block 302 towards the pedestal 301 is equipped with
For clamping the inner arc surface 3021 of impeller large cylindrical, the cutting tool 3 are uniformly arranged on machine chuck, along machine chuck
4 move radially and clamp impeller 1.
As shown in Fig. 4 to Figure 14, a kind of VTR series booster compression impellor processing method, comprising the following steps:
A. impeller center drill carriage axial bore 103 to
B. it is heat-treated；
C. with three claw clip outer circles, turning impeller end face and outer circle substantially after centering outer circle and end face；
D. with three claw clip outer circles, 102 end face of turning impeller small end and impeller axial bore substantially after centering outer circle and end face
103, while materialsing ring 2 on impeller small end top, sample ring be in step b with impeller it is androgynous, pass through vehicle again with furnace treatment reason
Cut acquisition；
E. mechanical performance and ultrasonic examination are detected using sample ring as wheel sample piece, since sample ring is same with impeller
Body is managed with furnace treatment, can completely, really reflect performance condition after impeller heat treatment；
F. with three claw clip outer circles, flat 101 end face of impeller big end, rough turn 102 end face of impeller small end and periphery are leaned on；
G. half smart car impeller big end 101, impeller small end 102, impeller meridian plane 104 and impeller axial bore 103；In this reality
It applies in example, in step g, including three steps, as shown in fig. 7, g1. soft three-jaw folder outer circle, half smart car impeller big end, 101 end face, back
Cambered surface 105 and impeller axial bore 103；As shown in figure 8, g2. soft three-jaw folder outer circle, half smart car impeller small end, 102 end face,
Periphery, annular groove 109, impeller meridian plane 104 and impeller axial bore 103 and small end inner bore chamfering, meridian plane 104 are reserved
Allowance 1mm；As shown in figure 9, impeller 1 is clamped in vehicle core shaft, half smart car impeller big end, 101 periphery and 45 ° of folders by g3.
Tight step 110；
H. impeller semi-finished product Set and Positioning is milled into blade 106 and runner in milling tool, milling tool is published using company
Granted patent, a kind of general milling tool of compression impellor (CN205733965U) positioning and clamping impeller；Mill blade and runner program point
To rough mill and finish-milling, controlled by numerical control program, the initial workpiece after Milling Machining send three coordinate measurements.
I. impeller semi-finished product are clamped in vehicle core shaft, 101 outer circle of smart car impeller big end is extremely
J. soft three-jaw folder large cylindrical, centering sealing gland face 111 are used, bounce is not more than 0.03mm, centering impeller axial bore
103, bounce is not more than 0.01mm, 101 end face of smart car impeller big end, convex surface 105 and impeller axial bore 103；
K. it on the basis of 101 end face of the big end of impeller, leans on planar end surface (cannot be filled in the clearance gauge inspection of 0.02mm), by leaf
Wheel is clamped in cutting tool described in claim 1, impeller positioning surface 107 used in smart car next procedure；On center lathe,
It designs, using Special purpose turning tool, the Set and Positioning face vehicle of process below is put down, and parallel with impeller large end face, for lower road
The smooth processing of process provides safe and reliable guarantee；
L. large cylindrical is gently pressed from both sides with soft three-jaw, on the basis of the impeller positioning surface 107 after process k processing, is positioned by flat impeller
Face (only check an impeller whether fill just, positioning surface whether good fit, do not beat impeller with centering end face run-out), bounce is not more than
0.03mm, centering impeller axial bore 103, bounce are not more than 0.01mm, and 101 end face of smart car impeller big end, convex surface 105 are gentle
Cover 111 and impeller axial bore 103；Sealing gland face radial run-out 0.045mm；When step l clamping, just looked for without striking by force
Stratosphere part does not deform so as to avoid the generation of clamping internal stress, therefore after smart car large end face, can smoothly reach drawing, set
Meter requires, and improves the dimensional accuracy and the accuracy of form and position of impeller large end face；
M. soft three-jaw folder outer circle, 101 end face of centering impeller axial bore 103 and impeller big end, by drawing smart car
102 end face of impeller small end is to size 67mm；
N. smart car impeller meridian plane 104 and vane end faces 108；
In the present embodiment, in step d sample ring quantity of sampling quantity according to every batch of Impeller Machining quantity number, by mark
Standard, which standardizes, determines that quantity of sampling quantity, code requirement, every batch of part processing quantity are less than (containing) 10, only takes 1 respectively from 2 parts
Part amounts to 2 sample rings, and part processing quantity is greater than 11 to 50, respectively takes 1 to amount to 4 sample rings from 4 parts respectively, and zero
Part processing quantity is greater than 51, respectively takes 1 to amount to 6 sample rings from 6 parts respectively, is able to satisfy quality control standard and specification
It is required that.
It further include that first dressing part burr, first time impeller single-piece are dynamic flat between step j and k in the present embodiment
Weighing apparatus test and overspeed test further include second of cleaning part burr, second of impeller single-piece dynamic balancing examination after step n
It tests.
As shown in Figure 15, Figure 16, cutting tool when in use, are connected on machine chuck with six soket head cap screws, folder
It holds the inner arc surface on block and clamps impeller large cylindrical, pull 3 interior square holes on machine chuck, make cutting tool along chuck diameter
Impeller is clamped to mobile, using Special purpose turning tool, is able to solve existing chuck inconvenience clamping, positioning is unstable, insecure
Problem, while it being able to achieve the indirect measurement of processing dimension in step k again, reliable positioning surface is provided for process below, and reach
With the requirement for looking for frontoparallel, reliable guarantee is provided for the smooth implementation of process below.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that；It still may be used
To modify to technical solution documented by previous embodiment, or some or all of the technical features are equal
Replacement；And these are modified or replaceed, the model for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses, should all cover within the scope of the claims and the description of the invention.
Claims (10)
1. a kind of cutting tool for VTR series booster compression impellor, it is characterised in that: including pedestal and be set to pedestal one
The grip block at end, the stepped hole being fixedly connected with machine chuck is vertically equipped on the pedestal, and cutting tool pass through stepped hole
It is fastenedly connected with screw and machine chuck, the grip block is equipped with the inner circle for clamping impeller large cylindrical towards the side of pedestal
Cambered surface, the cutting tool are uniformly arranged on machine chuck, move radially along machine chuck and clamp impeller.
2. a kind of VTR series booster compression impellor processing method, which comprises the following steps:
A. in impeller center drill carriage axial bore；
B. it is heat-treated；
C. turning impeller end face and outer circle substantially after centering outer circle and end face；
D. turning impeller small end and impeller axial bore substantially after centering outer circle and end face, while ring of materialsing on impeller；
E. mechanical performance and ultrasonic examination are detected using sample ring as wheel sample piece；
F. flat impeller big end end face, rough turn impeller small end are leaned on；
G. half smart car impeller big end, small end, impeller meridian plane and impeller axial bore；
H. impeller semi-finished product Set and Positioning is milled into blade and runner in milling tool；
I. impeller semi-finished product are clamped in vehicle core shaft, smart car impeller big end outer circle；
J. centering sealing gland face, centering impeller axial bore, smart car impeller big end and impeller axial bore；
K. on the basis of the big end end face of impeller, planar end surface is leaned on, impeller clamping is positioned at turning work described in claim 1
Have, impeller positioning surface used in smart car next procedure；
L. on the basis of the impeller positioning surface after process k processing, planar end surface, centering impeller axial bore, smart car impeller big end are leaned on
And impeller axial bore；
M. centering impeller axial bore and big end end face, by drawing smart car impeller small end end face；
N. smart car impeller meridian plane and vane end faces.
3. a kind of VTR series booster compression impellor processing method according to claim 2, it is characterised in that: in step d
With three claw clip outer circles, turning impeller small end end face and impeller axial bore, while materialsing ring on impeller small end top, the examination
Sample ring is to manage acquisition with impeller consubstantiality, with furnace treatment.
4. a kind of VTR series booster compression impellor processing method according to claim 2, it is characterised in that: in step f
With three claw clip outer circles, rough turn impeller small end end face and periphery.
5. a kind of VTR series booster compression impellor processing method according to claim 2, it is characterised in that: step g
In, including three steps,
G1. soft three-jaw folder outer circle, half smart car impeller big end end face, convex surface and impeller axial bore are used；
G2. soft three-jaw folder outer circle is used, half smart car impeller small end end face, periphery, annular groove, impeller meridian plane and impeller are axial
Inner hole and small end inner bore chamfering, meridian plane reserve allowance；
G3. by impeller clamping in vehicle core shaft, half smart car impeller big end periphery and clamping step.
6. a kind of VTR series booster compression impellor processing method according to claim 2, it is characterised in that: in step h
Milling blade and runner program, which are divided into, rough mills and finish-milling.
7. a kind of VTR series booster compression impellor processing method according to claim 2, it is characterised in that: step j
In, with soft three-jaw folder big end outer circle, centering sealing gland face, centering impeller axial bore, smart car impeller big end end face, convex surface and
Impeller axial bore.
8. a kind of VTR series booster compression impellor processing method according to claim 2, it is characterised in that: step l
In, large cylindrical is gently pressed from both sides with soft three-jaw, leans on flat impeller positioning surface, smart car impeller big end end face, the gentle cover of convex surface and impeller
Axial bore.
9. a kind of VTR series booster compression impellor processing method according to claim 3, it is characterised in that: the examination
Sample ring quantity of sampling quantity determines quantity of sampling quantity by standard criterion according to the number of every batch of Impeller Machining quantity.
10. a kind of VTR series booster compression impellor processing method according to claim 2, it is characterised in that: in step
Further include first dressing part burr, first time impeller single-piece dynamic balance running and overspeed test between j and k, step n it
After further include second of cleaning part burr, second of impeller single-piece dynamic balance running.
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| CN201910475317.3A CN110102989B (en) | 2019-06-03 | 2019-06-03 | Processing method of compressed air impeller of VTR series supercharger |
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| CN201910475317.3A CN110102989B (en) | 2019-06-03 | 2019-06-03 | Processing method of compressed air impeller of VTR series supercharger |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110605544A (en) * | 2019-09-23 | 2019-12-24 | 重庆江增船舶重工有限公司 | Method for machining nozzle ring blade |
| CN111168327A (en) * | 2019-12-30 | 2020-05-19 | 哈尔滨汽轮机厂有限责任公司 | Method for machining blade assembly inner and back arcs through powerful grinding machine |
| CN111745360A (en) * | 2020-07-09 | 2020-10-09 | 湖南南方通用航空发动机有限公司 | Machining method for casting impeller of blade blower |
| CN112894283A (en) * | 2021-01-29 | 2021-06-04 | 新奥动力科技(廊坊)有限公司 | Impeller machining method |
| CN113020899A (en) * | 2020-12-28 | 2021-06-25 | 重庆江增船舶重工有限公司 | Method for processing compressed air impeller of ZR series supercharger |
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