CN110385593A - Numerically-controlled machine tool module-type flexible vacuum fixture and its clamping method - Google Patents
Numerically-controlled machine tool module-type flexible vacuum fixture and its clamping method Download PDFInfo
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- CN110385593A CN110385593A CN201910724411.8A CN201910724411A CN110385593A CN 110385593 A CN110385593 A CN 110385593A CN 201910724411 A CN201910724411 A CN 201910724411A CN 110385593 A CN110385593 A CN 110385593A
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- main clamp
- rubber ring
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 49
- 238000005086 pumping Methods 0.000 claims description 11
- 238000003754 machining Methods 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000002775 capsule Substances 0.000 claims 1
- 239000000565 sealant Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- 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
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/08—Work-clamping means other than mechanically-actuated
- B23Q3/088—Work-clamping means other than mechanically-actuated using vacuum means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a kind of numerically-controlled machine tool module-type flexible vacuum fixture and its clamping methods, wherein numerically-controlled machine tool module-type flexible vacuum fixture includes main clamp plate and vacuum module, main clamp plate has versatility, main function is to carry out effectively quickly positioning and connecting to vacuum module clamping, while the main body for providing vacuum source exports and realizes that tooling integrally connect clamping with platen.Vacuum module is the main element of parts fixation positioning.Numerically-controlled machine tool module-type flexible vacuum fixture simple process provided by the invention, manufacturing cost is low, operate conveniently, strong flexibility, versatile, maintenance costs are low, can be applicable on numerically-controlled machine tool.
Description
Technical field
The invention belongs to the technical fields of machining, and in particular to a kind of numerically-controlled machine tool module-type flexible vacuum fixture and
Its clamping method.
Background technique
A large amount of aerospace component is typically necessary vacuum fixture in numerical control processing, not due to part shape, structure
Together, each single item part will customize a set of dedicated vacuum fixture.Existing vacuum fixture is entirely monoblock type.Namely
It says, tool base plate and vacuum localization region are integrated.From manufacture angle, improves the manufacture difficulty of tooling, increases
The tooling manufacturing cycle；From the point of view of using square degree, extends part and develop the process-cycle, improve frock cost.Furthermore, vacuum
For fixture once phenomena such as breaking down, damaging, maintenance recovery is more difficult, most of to customize again.Meanwhile tooling is in number
Control lathe on positioning need be straightened, centering, and using in tooling location hole or positioning pin progress working origin setting.In the past
Vacuum tooling be straightened, aligning method be usually tooling is placed on lathe after, utilize hundred be mounted on machine tool chief axis
Divide table, carries out tooling and centering is straightened, process is complicated, time-consuming, laborious, error-prone.Airplane parts general structure complexity, material cost
It is high, tooling is big, this just determine it is high to the requirement of numerical control processing first-time qualification rate, it is unqualified to avoid part, and before numerical control processing
Production preparation, it is often complicated and time-consuming, influence part delivery cycle.
Summary of the invention
The object of the present invention is to provide a kind of numerically-controlled machine tool module-type flexible vacuum fixture and its clamping methods, can root
According to the difference of part, corresponding vacuum area module is replaced, to realize different parts fixation positioning.Meanwhile passing through main clamp plate
On quick location hole and vacuum module on positioning pin realize quickly positioning and numerical control working origin be fast and accurately arranged.
The technical solution of the present invention is as follows:
A kind of numerically-controlled machine tool module-type flexible vacuum fixture, the numerically-controlled machine tool module-type flexible vacuum fixture include folder
Have mainboard 1 and vacuum module 2, vacuum module 2 is set to 1 top of main clamp plate；Wherein, 1 upper surface of main clamp plate is opened
Vacuum suction screw thread mouth 4, fastening thread hole 5 and quick location hole 6, the lower part of main clamp plate 1 are provided with vacuum air bag 13,
The side wall of main clamp plate 1 is provided with vacuum line connector 3；The vacuum air bag 13 is " ten " font, multiple vacuum suction spiral shells
Line mouth 4 is located along the same line, corresponding with the position of vacuum air bag 13, vacuum air bag 13 and vacuum line connector 3 and vacuum
It is evacuated screw thread mouth 4 to be connected to, forms evacuation passageway, and vacuum air bag 13 is not connected to fastening thread hole 5 and quick location hole 6；
Multiple quick location holes 6 are evenly distributed in the main clamp plate 1, quickly to be positioned to vacuum module 2 and origin
Setting；Multiple fastening thread holes 5, the fastening for vacuum module 2 are evenly distributed in main clamp plate 1；The vacuum module 2
Upper surface and bottom are provided with sealing rubber ring mounting groove, and the side wall of vacuum module 2 is provided with the quick location hole 14 of module, vacuum mold
Counter sink is offered on block 2, wherein the first vacuum module sealing rubber ring 7 is accommodated in the sealing rubber ring mounting groove of bottom, to guarantee
Air-tightness between vacuum module 2 and main clamp plate 1；The sealing of the second vacuum module is accommodated in the sealing rubber ring mounting groove of upper surface
Cushion rubber 9, to guarantee the air-tightness between vacuum module 2 and part；Quick location hole 14 cooperates with quick pins 10, for
Quick location hole 6 in main clamp plate 1 connects, so that vacuum module 2 is quickly located by connecting with main clamp plate 1；Counter sink and tight
Gu screw 8 cooperates, fastening screw 8 passes through vacuum module 2, in main clamp plate 1 fastening thread hole 5 is screwed into, so that vacuum module 2
Fastening is connect with main clamp plate 1, after vacuum module 2 connect fastening with main clamp plate 1, vacuum pumping opening 15 and vacuum suction screw thread
Mouth 4, vacuum air bag 13, vacuum line connector 3 are connected to, with clamping parts.
Further, the numerically-controlled machine tool module-type flexible vacuum fixture further includes the sealing of sealing screw 11 and annular
Cushion rubber 12, sealing screw 11 and sealing rubber ring 12 are used cooperatively, to block the not used vacuum suction spiral shell in main clamp plate 1
Line mouth 4, to guarantee the air-tightness of entire vacuum system.
On the other hand, the present invention provides use above-mentioned numerically-controlled machine tool module-type flexible vacuum fixture and carry out clamping
Method comprising following steps:
Step 1): main clamp plate 1 is placed on platen, by being fixed after quick 6 centering of location hole；
Step 2): the center position coordinates value of any one quick location hole 6 in main clamp plate 1 is placed in Machine-Tool Control
System simultaneously saves；
Step 3): one end of vacuum line is connect with the vacuum line connector 3 in main clamp plate 1, the other end of pipeline
Connect Vacuum Pumps Station pipeline terminal；
Step 4): the first vacuum module sealing rubber ring 7 is mounted in the sealing rubber ring mounting groove of 2 lower section of vacuum module；
Step 5): subsequent parts clamping is required and be convenient for according to the pitch-row of technology establishment, selects in position fast
Fast location hole 6, quick pins 10 are inserted；
Step 6): sealing screw 11 and sealing rubber ring 12 are mounted on and do not taken out in sealing area, exposed vacuum
In gas screw thread mouth 4, tightens, seals；
Step 7): by the quick location hole 14 of the module of vacuum module 2, alignment procedures 5) in mounted quick pins
10, carry out installation connection；
Step 8): fastening screw 8, by the counter sink on vacuum module 2, the fastening spiral shell that is screwed into main clamp plate 1 are used
In pit 5, it is fixedly clamped；
Step 9): the second vacuum module sealing rubber ring 9 is mounted in the sealing rubber ring mounting groove of 2 top of vacuum module；
Step 10): opening vacuum pump valve, checks at the vacuum pumping opening 15 on vacuum module 2 whether there is pumping effect, really
Recognize it is errorless after, close vacuum pump valve；
Step 11): by the coordinate origin for the quick location hole 6 that merging saves in step 2), by the phase of programming machining benchmark
Size is biased, part working origin can be obtained；
Step 12): part is mounted on vacuum module 2；
Step 13): opening vacuum pump valve, checks part adsorbed state；
Step 14): after confirmation is errorless, start to process part.
The invention has the advantages that: numerically-controlled machine tool module-type flexible vacuum fixture simple process provided by the invention,
Manufacturing cost is low, operate conveniently, strong flexibility, versatile, maintenance costs are low, can be applicable on numerically-controlled machine tool.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the numerically-controlled machine tool module-type flexible vacuum fixture provided in the embodiment of the present invention.
Fig. 2 is in Fig. 1 along A-A view.
Fig. 3 is in Fig. 1 along B-B view.
In figure: 1 main clamp plate；2 vacuum modules；3 vacuum line connectors；4 vacuum suction screw thread mouths；5 fastening thread holes；6
Quick location hole；7 first vacuum module sealing rubber rings；8 fastening screws；9 second vacuum module sealing rubber rings；10 quickly positioning
Pin；11 sealing screws；12 sealing rubber rings；13 vacuum air bags；The quick location hole of 14 modules；15 vacuum pumping openings.
Specific embodiment
Below in conjunction with attached drawing and technical solution, a specific embodiment of the invention is further illustrated.
It is to be appreciated that appended attached drawing is not proportionally drawn, and merely to illustrating each of basic principle of the invention
The suitably simplified technique of painting of kind feature.The specific design feature of invention disclosed herein include for example specific size, direction,
Position and shape will be partly determined by the specific application and use environment.
In appended multiple attached drawings, same or equivalent component (element) is with the index of identical appended drawing reference.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.
Fig. 1 is the structural schematic diagram of the numerically-controlled machine tool module-type flexible vacuum fixture provided in the embodiment of the present invention.Fig. 2 is
Along A-A view in Fig. 1.Fig. 3 is in Fig. 1 along B-B view.Referring to Fig. 1 to Fig. 3, in the present embodiment, numerically-controlled machine tool modular is soft
Property vacuum fixture includes main clamp plate 1 and vacuum module 2.Main clamp plate 1 has versatility, and main function is to vacuum module 2
It carries out effectively quick positioning and connection clamps, while the main body for providing vacuum source exports and realizes that tooling is whole and lathe works
Platform connection clamps.
Specifically, 1 upper surface of main clamp plate offers vacuum suction screw thread mouth 4, fastening thread hole 5, quick location hole 6,
Lower part is provided with vacuum air bag 13, and side wall is provided with vacuum line connector 3；Vacuum air bag 13 is " ten " font, and multiple vacuum are taken out
Gas screw thread mouth 4 is located along the same line, corresponding with the position of vacuum air bag 13, vacuum air bag 13 and vacuum line connector 3 and
Vacuum suction screw thread mouth 4 is connected to, and forms evacuation passageway, and vacuum air bag 13 does not connect with fastening thread hole 5 and quick location hole 6
It is logical.Realize that the additional air between part and 2 binding face of vacuum module passes through vacuum suction screw thread under the action of Vacuum Pumps Station
It is excluded in mouth 4, vacuum air bag 13, vacuum line connector 3 and the vacuum line of connection, realizes vacuum state, guarantee that part is inhaled
It is attached on vacuum module 2.
The quick location hole 6 of multiple groups of High-precision standard pitch-row is uniformly distributed in main clamp plate 1, for realizing vacuum module 2
It is quick positioning and origin setting.In addition, multiple groups fastening thread hole 5 is uniformly distributed in main clamp plate 1, for realizing vacuum module
2 fastening.It can also be directly threaded into screw rod when necessary, use the direct compressing component of pressing plate.
Vacuum module 2 is the main element of parts fixation positioning, and bottom is equipped with sealing rubber ring mounting groove, for installing first
Vacuum module sealing rubber ring 7 guarantees its air-tightness requirement between main clamp plate 1.In addition the upper surface of vacuum module 2 is equipped with
Sealing rubber ring mounting groove guarantees its air-tightness requirement between part for installing the second vacuum module sealing rubber ring 9.
2 side wall of vacuum module is provided with the quick location hole 14 of module, by quick pins 10, is used to and main clamp plate 1
On quick location hole 6 connect, realize vacuum module 2 be quickly located by connecting with main clamp plate 1.It is had also been devised on vacuum module 2
Counter sink passes through vacuum module 2 using fastening screw 8, is screwed into main clamp plate 1 fastening thread hole 5, Lai Shixian vacuum module
2 connect fastening with main clamp plate 1, after vacuum module 2 connect fastening with main clamp plate 1, vacuum pumping opening 15 and vacuum suction spiral shell
Line mouth 4, vacuum air bag 13, vacuum line connector 3 are connected to, with clamping parts.
Sealing screw 11 and the sealing rubber ring 12 of annular are used cooperatively jointly, are mainly used for blocking in main clamp plate 1
Vacuum suction screw thread mouth 4 temporarily extra, on the shelf, guarantees the air-tightness of entire vacuum system.
Use the clamping method of numerically-controlled machine tool module-type flexible vacuum fixture:
Step 1: before use, first main clamp plate 1 is placed on platen；By quick location hole 6, pressed after centering
It fastens；
Step 2: the center position coordinates value of any one quick location hole 6 in main clamp plate 1 is placed in Machine-Tool Control
System simultaneously saves that (the quick location hole 6 on numerically-controlled machine tool module-type flexible vacuum fixture shares 32, the distance in adjacent two hole
For 100mm.So, it is only necessary to the position coordinates for saving one of hole, if you need to use other location holes, it is only necessary to according to
Standard hole pitch biasing)；
Step 3: the vacuum line connector 3 in one end of vacuum line and main clamp plate 1 is connected firmly, pipeline it is another
One end connects Vacuum Pumps Station pipeline terminal；
Step 4: the first vacuum module sealing rubber ring 7 being mounted in the sealing rubber ring mounting groove of 2 lower section of vacuum module；
Step 5: subsequent parts clamping is required and be convenient for according to the pitch-row of technology establishment, selects in position quick
Quick pins 10 are inserted by location hole 6；
Step 6: by sealing screw 11 and sealing rubber ring 12, be mounted on it is will not using, not sealing area, exposed
In vacuum suction screw thread mouth 4 outside, tighten, seal (in order to guarantee different shape, different sizes part it is general
Property, main clamp plate 1 devise vacuum suction screw thread mouth 4 at 5, need to select according to processing, and what is do not used will do at sealing
Reason)；
Step 7: by the quick location hole 14 of the subsidiary module of vacuum module 2, mounted quick positioning in alignment procedures 5
Pin 10 carries out installation connection, guarantees that vacuum module 2 is smooth and is mounted in main clamp plate 1；
Step 8: using fastening screw 8, by the counter sink on vacuum module 2, the fastening thread being screwed into main clamp plate 1
In hole 5, it is fixedly clamped；
Step 9: the second vacuum module sealing rubber ring 9 being mounted in the sealing rubber ring mounting groove of 2 top of vacuum module；
Step 10: opening vacuum pump valve, check at the vacuum pumping opening 15 on vacuum module 2 whether there is pumping effect, really
Recognize it is errorless after, close vacuum pump valve；
Step 11: the coordinate origin of the quick location hole 6 of preservation will be placed in step 2, by the opposite of programming machining benchmark
Size, which is biased, can be obtained part working origin；
Step 12: part is mounted on vacuum module 2；
Step 13: opening vacuum pump valve, check part adsorbed state；
Step 14: after confirmation is errorless, starting to process part.
The description that foregoing exemplary embodiment is presented is merely illustrative of the technical solution of the present invention, and is not intended to become
Without missing, it is also not intended to limit the invention to described precise forms.Obviously, those skilled in the art's root
Many changes are made according to above-mentioned introduction and variation is all possible.The exemplary embodiment was chosen and described for the sake of explanations
Certain principles and practical application of the invention, so that others skilled in the art are easy to understand, realize and utilize
Various illustrative embodiments of the invention and its various selection forms and modification.Protection scope of the present invention is intended to by institute
Attached claims and its equivalents are limited.
Claims (3)
1. a kind of numerically-controlled machine tool module-type flexible vacuum fixture, which is characterized in that the numerically-controlled machine tool module-type flexible vacuum
Fixture includes main clamp plate (1) and vacuum module (2), and vacuum module (2) is set to above main clamp plate (1)；Wherein,
Described main clamp plate (1) upper surface offers vacuum suction screw thread mouth (4), fastening thread hole (5) and quick location hole
(6), the lower part of main clamp plate (1) is provided with vacuum air bag (13), and the side wall of main clamp plate (1) is provided with vacuum line connector
(3)；The vacuum air bag (13) is " ten " font, and multiple vacuum suction screw thread mouths (4) are located along the same line, with vacuum gas
The position of capsule (13) is corresponding, and vacuum air bag (13) is connected to vacuum line connector (3) and vacuum suction screw thread mouth (4), is formed
Evacuation passageway, and vacuum air bag (13) is not connected to fastening thread hole (5) and quick location hole (6)；
Multiple quick location holes (6) are evenly distributed in the main clamp plate (1), it is quick to be carried out to vacuum module (2)
Positioning and origin setting；Multiple fastening thread holes (5) are evenly distributed in main clamp plate (1), for the tight of vacuum module (2)
Gu；
Vacuum module (2) upper surface and bottom are provided with sealing rubber ring mounting groove, and the side wall of vacuum module (2) is provided with
The quick location hole of module (14) offers counter sink and vacuum pumping opening (15) on vacuum module (2)；Wherein, bottom is close
The first vacuum module sealing rubber ring (7) is accommodated in sealing rubber ring mounting groove, to guarantee between vacuum module (2) and main clamp plate (1)
Air-tightness；The second vacuum module sealing rubber ring (9) is accommodated in the sealing rubber ring mounting groove of upper surface, to guarantee vacuum module 2
Air-tightness between part；Quick location hole (14) and quick pins (10) cooperate, for it is fast on main clamp plate (1)
Fast location hole (6) connection, so that vacuum module (2) is quickly located by connecting with main clamp plate (1)；Counter sink and fastening screw (8)
Cooperation, fastening screw (8) pass through vacuum module (2), the fastening thread hole (5) of (1) are screwed into main clamp plate, so that vacuum module
(2) connect fastening with main clamp plate (1), after vacuum module (2) connect fastening with main clamp plate (1), vacuum pumping opening (15) with
Vacuum suction screw thread mouth (4), vacuum air bag (13), vacuum line connector (3) connection, with clamping parts.
2. numerically-controlled machine tool module-type flexible vacuum fixture according to claim 1, which is characterized in that the numerically-controlled machine tool
Module-type flexible vacuum fixture further includes the sealing rubber ring (12) of sealing screw (11) and annular, sealing screw (11) and sealant
Circle (12) is used cooperatively, entire true to guarantee to block the not used vacuum suction screw thread mouth (4) on main clamp plate (1)
The air-tightness of empty set system.
3. the method for carrying out clamping using numerically-controlled machine tool module-type flexible vacuum fixture described in as claimed in claim 1 or 22, feature exist
In, comprising the following steps:
Step 1): main clamp plate (1) is placed on platen, by being fixed after quick location hole (6) centering；
Step 2): the center position coordinates value of any one quick location hole (6) on main clamp plate (1) is placed in Machine-Tool Control
System simultaneously saves；
Step 3): one end of vacuum line is connect with the vacuum line connector (3) on main clamp plate (1), the other end of pipeline
Connect Vacuum Pumps Station pipeline terminal；
Step 4): the first vacuum module sealing rubber ring (7) is mounted in the sealing rubber ring mounting groove below vacuum module (2)；
Step 5): according to technology establishment pitch-row require and be convenient for subsequent parts clamping, select in position it is quick calmly
Position hole (6), quick pins (10) are inserted；
Step 6): sealing screw (11) and sealing rubber ring (12) are mounted on and do not taken out in sealing area, exposed vacuum
In gas screw thread mouth (4), tightens, seals；
Step 7): by the quick location hole of module (14) of vacuum module (2), alignment procedures 5) in mounted quick pins
(10), installation connection is carried out；
Step 8): using fastening screw (8), by the counter sink on vacuum module (2), the fastening being screwed on main clamp plate (1)
In threaded hole (5), it is fixedly clamped；
Step 9): the second vacuum module sealing rubber ring (9) is mounted in the sealing rubber ring mounting groove above vacuum module (2)；
Step 10): opening vacuum pump valve, checks at the vacuum pumping opening (15) on vacuum module (2) whether there is pumping effect, really
Recognize it is errorless after, close vacuum pump valve；
Step 11): by the coordinate origin for the quick location hole (6) that merging saves in step 2), by the opposite of programming machining benchmark
Size, which is biased, can be obtained part working origin；
Step 12): part is mounted on vacuum module (2)；
Step 13): opening vacuum pump valve, checks part adsorbed state；
Step 14): after confirmation is errorless, start to process part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910724411.8A CN110385593A (en) | 2019-08-07 | 2019-08-07 | Numerically-controlled machine tool module-type flexible vacuum fixture and its clamping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910724411.8A CN110385593A (en) | 2019-08-07 | 2019-08-07 | Numerically-controlled machine tool module-type flexible vacuum fixture and its clamping method |
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| CN110385593A true CN110385593A (en) | 2019-10-29 |
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| CN201910724411.8A Pending CN110385593A (en) | 2019-08-07 | 2019-08-07 | Numerically-controlled machine tool module-type flexible vacuum fixture and its clamping method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112192496A (en) * | 2020-09-30 | 2021-01-08 | 靖江先锋半导体科技有限公司 | Assembling method of thimble supporting part for lifting wafer |
| CN113385969A (en) * | 2021-06-25 | 2021-09-14 | 中航力源液压股份有限公司 | Universal fixture and process for machining multi-type rotor inclined holes |
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| CN112192496A (en) * | 2020-09-30 | 2021-01-08 | 靖江先锋半导体科技有限公司 | Assembling method of thimble supporting part for lifting wafer |
| CN113385969A (en) * | 2021-06-25 | 2021-09-14 | 中航力源液压股份有限公司 | Universal fixture and process for machining multi-type rotor inclined holes |
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Application publication date: 20191029 |