CN108067654A - A kind of reaming processing unit (plant) and reaming method - Google Patents
A kind of reaming processing unit (plant) and reaming method Download PDFInfo
- Publication number
- CN108067654A CN108067654A CN201711043346.XA CN201711043346A CN108067654A CN 108067654 A CN108067654 A CN 108067654A CN 201711043346 A CN201711043346 A CN 201711043346A CN 108067654 A CN108067654 A CN 108067654A
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- Prior art keywords
- hole
- reaming
- plant
- processing unit
- positioning plate
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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
- B23B41/00—Boring or drilling 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
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B43/00—Boring or drilling devices able to be attached to a machine tool, whether or not replacing an operative portion of the machine tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/02—Boring templates or bushings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a kind of reaming processing unit (plant) and reaming methods, belong to work pieces process field.Reaming processing unit (plant) includes positioning component and process tool, positioning component includes the positioning plate and locating piece of annular, and positioning plate is co-axially located in inner cylinder, locating piece is arranged on the end face of one end of the close datum hole of positioning plate, locating piece is equipped with a positioning hole, and location hole is oppositely arranged with datum hole；Process tool includes axial guide rod, cutting portion and the clamping portion sequentially coaxially connected, guide rod coordinates with location hole, so that cutting portion during machining benchmark hole along the axial movement of location hole, it can ensure the precision and concentricity in hole during reaming processing, and the reaming processing unit (plant) is simple in structure, it is easily operated.
Description
Technical field
The present invention relates to work pieces process technical field, more particularly to a kind of reaming processing unit (plant) and reaming method.
Background technology
Gas turbine can be divided into two major classes, annular casing and babinet casing according to the design structure of its casing, in annular machine
There is a kind of part to include inner cylinder and outer barrel in casket, and outer barrel is coaxially set in outside inner cylinder.It is connected between inner cylinder and outer barrel multiple
The column of radial arrangement.A cylindrical through hole is axially arranged with along it at least one column in multiple columns, by this
Through hole can be such that the inside of inner cylinder is connected with the external of outer barrel, which is used to fit into flowline.
The existing method for processing the through hole is typically first to process a cylindrical base along the axis of column to be processed
Quasi- hole, and the axial length of the cylindrical datum hole is identical with the axial length of column, then using broad along this
The axis direction of datum hole carries out reaming processing to the datum hole.
In the implementation of the present invention, inventor has found that the prior art has at least the following problems：
Since the axial length of the datum hole and the ratio of diameter are larger, 9 are typically larger than, using the above method to the benchmark
When hole carries out reaming processing, add it is difficult to ensure that cutter carries out reaming all along the axial direction of the datum hole to the datum hole
Work, easily that through hole brill is askew, the precision of the through hole processed is difficult to ensure that.
The content of the invention
In order to solve problem of the prior art, an embodiment of the present invention provides a kind of reaming processing unit (plant) and reaming processing sides
Method.The technical solution is as follows：
In a first aspect, the present invention provides a kind of reaming processing unit (plant), suitable for the datum hole on workpiece to be processed into
Row reaming, the workpiece to be processed include inner cylinder and outer barrel, and the outer barrel is coaxially set in outside the inner cylinder, the inner cylinder and institute
It states and is connected with multiple columns between outer barrel, the datum hole is arranged on the column, and the datum hole connects the inner cylinder
The outside of internal and described outer barrel, the reaming processing unit (plant) include positioning component and process tool,
The positioning component includes the positioning plate and locating piece of annular, and the positioning plate is co-axially located at the inner cylinder
In, the locating piece is arranged on the end face of one end of the close datum hole of the positioning plate, and the locating piece is equipped with
A positioning hole, the location hole are oppositely arranged with the datum hole；
The process tool includes axial guide rod, cutting portion and the clamping portion sequentially coaxially connected, the guide rod with
The location hole cooperation so that the cutting portion is during the datum hole is processed along the axial movement of the location hole.
Further, the axis of the location hole is vertical with the axis of the positioning plate.
Further, the locating piece is equipped with mounting hole, is equipped with drill bushing in the mounting hole, the location hole is arranged on
On the drill bushing.
Further, one end of the drill bushing is equipped with the flange ring that extends radially outward, the flange ring with it is described fixed
Position block is fixedly connected.
Further, the inner wall of the inner cylinder is equipped with radially inwardly extending annular protrusion, is set on the positioning plate
There is at least one tapped through hole, the axis of the tapped through hole is parallel with the axis of the positioning plate, is set in the tapped through hole
There is hook-type screw, the hook-type screw includes screw rod and is arranged on the gripping block of one end of the screw rod, the positioning plate and institute
Gripping block is stated to be folded on the annular protrusion.
Further, the positioning plate is equipped at least two positioning pins, the inner wall of the inner cylinder be equipped with radially to
The annular protrusion of interior extension, the annular protrusion are equipped at least two dowel holes, the positioning pin and the dowel hole
Cooperation.
Further, the axial length L of the guide rod meets：
H≤L≤D
Wherein, D be the inner cylinder internal diameter, H be the outer barrel outer wall to the location hole minimum range.
Further, when the datum hole is equipped with pilot hole close to one end of the outer barrel, the axis of the guide rod
Meet to length L：
D-d≤L≤H
Wherein, D be the inner cylinder internal diameter, H be the outer barrel outer wall to the minimum range of the location hole, d is institute
The axial length of pilot hole is stated, the axis of the pilot hole is overlapped with the axis of the location hole.
Second aspect, the present invention provides a kind of reaming methods, are processed suitable for reaming as described in relation to the first aspect
Device, the reaming method include：
Positioning plate is co-axially located in inner cylinder so that the location hole on locating piece is opposite with the datum hole of workpiece to be processed
It sets；
By the clamping portion clamping of process tool on lathe；
By guide rod assembling in location hole；
The guide rod is controlled to be moved along the axis of the location hole to the direction away from datum hole, makes the process tool
Cutting portion to the datum hole carry out reaming processing.
Further, before the clamping portion clamping by process tool is on lathe, the reaming method is also
Including：
First time reaming processing is carried out close to one end of the outer barrel to the datum hole using milling cutter, is led with processing
Xiang Kong.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
By setting positioning component and processing assembly, positioning component includes the positioning plate and locating piece of annular, on locating piece
If there are one location hole, location hole is oppositely arranged with datum hole.Process tool includes axial sequentially connected guide rod, cutting portion
With clamping portion, guide rod coordinates with location hole so that cutting portion is during machining benchmark hole always along the axial direction of location hole
It is mobile.In specific reaming process, by clamping portion clamping on lathe, by the way that clamping portion is controlled to rotate, cutting portion is driven
Rotation so that cutting portion can carry out reaming processing all along the axial of location hole to datum hole, ensure that the hole that processes
Precision and concentricity.And the reaming processing unit (plant) is simple in structure, it is easy to operation.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structure diagram of the use state of reaming processing unit (plant) provided in an embodiment of the present invention；
Fig. 2 is a kind of structure diagram of process tool provided in an embodiment of the present invention；
Fig. 3 is a kind of structure diagram of positioning plate provided in an embodiment of the present invention；
Fig. 4 is a kind of structure diagram of hook-type screw provided in an embodiment of the present invention；
Fig. 5 is a kind of bottom view of positioning plate provided in an embodiment of the present invention；
Fig. 6 is a kind of method flow diagram of reaming method provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of structure diagram of the use state of reaming processing unit (plant) provided in an embodiment of the present invention.In order to more
The good understanding present invention first briefly describes the structure of workpiece to be processed below.
As shown in Figure 1, the workpiece to be processed includes inner cylinder 100 and outer barrel 200, it is connected between inner cylinder 100 and outer barrel 200
Multiple columns 300, set that there are one datum hole 400, the datum holes inside a column in multiple columns 300 along its axis direction
The inside of 400 connection inner cylinders 100 and the outside of outer barrel 200.The inner wall of inner cylinder 100 is equipped with radially inwardly extending convex annular
Play 110.
As shown in Figure 1, reaming processing unit (plant) includes positioning component 1, positioning component 1 includes positioning plate 11 and the positioning of annular
Block 12, positioning plate 11 are co-axially located in inner cylinder 100, and locating piece 12 is arranged on one end of the close datum hole 400 of positioning plate
On end face.Locating piece 12 is equipped with a positioning hole 12a, and location hole 12a is oppositely arranged with datum hole 400.
In the present embodiment, the axis of location hole 12a is vertical with the axis of positioning plate 11.In other embodiments, position
The axis of hole 12a can also be in set angle with the axis of positioning plate 11, which can be set according to actual needs
It puts, in order to be processed to different holes.
The reaming processing unit (plant) further includes process tool.Fig. 2 is a kind of knot of process tool provided in an embodiment of the present invention
Structure schematic diagram, as shown in Fig. 2, process tool 2 includes axial guide rod 21, cutting portion 22 and the clamping portion sequentially coaxially connected
23.Guide rod 21 and location hole 12a coordinates so that cutting portion 22 is during machining benchmark hole 400 along the axis of location hole 12a
To movement, cutting portion 22 is equipped with the cylindrical structure of multiple cutter tooth (not shown)s for outer surface.
Specifically, for clamping in lathe, Machine-Tool Control clamping portion 23 rotates in clamping portion 23, so as to drive cutting
Portion 22 rotates, to carry out subsequent reaming process operation.
For the embodiment of the present invention by setting positioning component and processing assembly, positioning component includes positioning plate and the positioning of annular
Block is set on locating piece there are one location hole, and location hole is oppositely arranged with datum hole.Process tool includes axially sequentially connected lead
To bar, cutting portion and clamping portion, guide rod coordinates with location hole so that cutting portion is during machining benchmark hole always along fixed
The axial movement in position hole.In specific reaming process, by clamping portion clamping on lathe, by the way that clamping portion is controlled to rotate,
Drive cutting portion rotation so that cutting portion can carry out reaming processing all along the axial of location hole to datum hole, ensure that and add
The precision and concentricity in the hole that work goes out.And the reaming processing unit (plant) is simple in structure, it is easy to operation.
Specifically, as depicted in figs. 1 and 2, the axial length L of guide rod 21 meets：
H≤L≤D
Wherein, D be inner cylinder 100 internal diameter, H be outer barrel 200 outer wall to location hole 12a minimum range.It can then protect
Reaming processing can be carried out to entire datum hole by demonstrate,proving cutting portion 22, while will not also be interfered with the interior contact of inner cylinder.
When one end of the close outer barrel 200 of datum hole 400 is equipped with pilot hole (not shown), the axial direction of guide rod 21
Length L meets：
H-d≤L≤D
Wherein, D be inner cylinder 100 internal diameter, H be outer barrel 200 outer wall to the minimum range of location hole 12a, d is pilot hole
Axial length, the axis of pilot hole overlaps with the axis of location hole 12a.When equipped with pilot hole, guide rod can be reduced
Length saves material.
Further, as shown in Figure 1, locating piece 12 is equipped with mounting hole, drill bushing 3 is equipped in mounting hole, location hole 12a is set
It puts on drill bushing 3.By set drill bushing can prevent guide rod along location hole axial movement when, wear locating piece, after influencing
The machining accuracy of continuous reaming processing.And drill bushing is made of wear-resistant material, is not susceptible to wear.
In the present embodiment, one end of the close datum hole 400 of drill bushing 3 is equipped with the flange ring 31 extended radially outward,
It is fixed between flange ring 31 and locating piece 12 by bolt 31a, can prevent drill bushing from rotating.In other embodiments,
The flange ring extended radially outward can be equipped in one end of the separate datum hole 400 of drill bushing 3.Since drill bushing and locating piece can
Dismantling connection, it is also more convenient for the replacement of drill bushing.
Fig. 3 is a kind of structure diagram of positioning plate provided in an embodiment of the present invention, as shown in figure 3, with reference to Fig. 1, positioning
Plate 11 is equipped at least one tapped through hole 11a, and the axis of tapped through hole 11a is parallel with the axis of positioning plate 11, tapped through hole
Hook-type screw 4 is equipped in 11a.
In the present embodiment, circle an annular stopper 11c, annular stopper 11c and ring are equipped with along its axis on positioning plate 11
Shape protrusion 110 matches.By setting annular stopper, the axially position to positioning plate 11 can be realized.
Fig. 4 is a kind of structure diagram of hook-type screw provided in an embodiment of the present invention, as shown in figure 4, with reference to Fig. 1, hook
Shape screw 4 includes screw rod 41 and is arranged on the gripping block 42 of one end of screw rod 41, and gripping block 42 forms L-type structure with screw rod 41.
With reference to Fig. 1, positioning plate 11 and gripping block 42 are folded on annular protrusion 110, when hook-type screw 4 and positioning plate 11 are clamped in annular
When in protrusion 110, gripping block 42 is located at the same side with locating piece 12, and, the length of gripping block 42. in positioning plate 11 radially
More than the distance that screw rod 41 arrives annular protrusion 110, in the axial direction of positioning plate 11, annular protrusion 110 is located at gripping block 42 and determines
Between the plate 11 of position.The other end of screw rod 41 is provided with nut 43, and it is fixed to be clamped in annular protrusion 110 by locking nut 43
Between position plate 11 and gripping block 42.
Fig. 5 is a kind of bottom view of positioning plate provided in an embodiment of the present invention, as shown in figure 5, in the present embodiment, positioning
It is provided at circumferentially spaced on plate 11 along it there are three tapped through hole 11a, can cause consolidating between positioning plate 11 and annular protrusion 110
It is fixed more to stablize.
It with reference to Fig. 1 and Fig. 3, is set on positioning plate 11 there are two positioning pin 11b, sets that there are two positioning pins on annular protrusion 110
Hole 110a, two of which dowel hole 110a are symmetrical arranged, and positioning pin 11b and dowel hole 110a is interference fitted.
In specific implementation, set on positioning plate 11 there are two the dowel hole being arranged symmetrically, two positioning pin 11b are set respectively
It puts in two dowel holes, and positioning pin 11b is interference fitted with dowel hole.The number of positioning pin 11b can also be according to ring
The actual number of dowel hole is configured in shape protrusion 110.By setting positioning pin, positioning plate can be positioned, prevented
Only positioning plate rotates, while location hole can be caused with datum hole face to be kept to set.
One in two of which positioning pin 11b can be cylindrical type positioning pin, another can be diamond positioning pin,
Since positioning pin and dowel hole are interference fits, cylindrical type positioning pin is mounted on the dowel hole 110a on annular protrusion 110
It, may be to damaging dowel hole 110a to a certain extent when middle, therefore one of positioning pin can be arranged to diamond shape and determined
Position pin, reduces the damage to dowel hole.It as shown in figure 5, can be on positioning plate 11 close to the position of one of dowel hole
One bar hole 11d is set for the dowel hole to be marked to be used to set Cylindrical locating pins or diamond positioning pin.
Further, as shown in figure 5, positioning plate 11 is equipped with dowel hole 111 and mounting hole 112, set in dowel hole
There is positioning pin (not shown), locating piece 12 is equipped with corresponding dowel hole, and locating piece 12 is set by positioning finger setting
On positioning plate 11.Bolt is equipped in mounting hole 112, is correspondingly arranged on threaded hole on locating piece 12, locating piece 12 passes through bolt
It is fixed on positioning plate 11.
An embodiment of the present invention provides a kind of reaming methods, and above-mentioned reaming processing unit (plant) may be employed and realize, Fig. 6 is
The method flow diagram of a kind of reaming method provided in an embodiment of the present invention, as shown in fig. 6, the reaming method includes：
Positioning plate is co-axially located in inner cylinder by step 601.
Specifically, positioning plate is fixed on annular protrusion so that the base of location hole and workpiece to be processed on locating piece
Quasi- hole is oppositely arranged.
Step 602, by the clamping portion clamping of process tool on lathe.
Step 603 assembles guide rod in location hole.
Step 604 carries out reaming processing to datum hole.
Specifically, guide rod is controlled to be moved along the axis of location hole to the direction away from datum hole, makes cutting for process tool
It cuts portion and reaming processing is carried out to datum hole.
Specifically, before step 602 is performed, which can also include：
First time reaming processing is carried out to one end of the close outer barrel of datum hole using milling cutter, to process pilot hole.Its
In, the axis of pilot hole is overlapped with the axis of location hole.Pilot hole can play the role of guiding, while set a pilot hole
The length of guide rod can also be reduced.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of reaming processing unit (plant), suitable for carrying out reaming, the workpiece to be processed bag to the datum hole on workpiece to be processed
Inner cylinder and outer barrel are included, the outer barrel is coaxially set in outside the inner cylinder, is connected between the inner cylinder and the outer barrel multiple vertical
Column, the datum hole are arranged on the column, and the datum hole connects the inside of the inner cylinder and the outside of the outer barrel,
It being characterized in that, the reaming processing unit (plant) includes positioning component and process tool,
The positioning component includes the positioning plate and locating piece of annular, and the positioning plate is co-axially located in the inner cylinder, institute
State locating piece be arranged on the positioning plate close to the datum hole one end end face on, the locating piece be equipped with one positioning
Hole, the location hole are oppositely arranged with the datum hole；
The process tool includes axial guide rod, cutting portion and the clamping portion sequentially coaxially connected, the guide rod with it is described
Location hole coordinates so that the cutting portion is during the datum hole is processed along the axial movement of the location hole.
2. reaming processing unit (plant) according to claim 1, which is characterized in that the axis of the location hole and the positioning plate
Axis it is vertical.
3. reaming processing unit (plant) according to claim 1, which is characterized in that the locating piece is equipped with mounting hole, described
Drill bushing is equipped in mounting hole, the location hole is arranged on the drill bushing.
4. reaming processing unit (plant) according to claim 3, which is characterized in that one end of the drill bushing is equipped with radially
The flange ring of extension, the flange ring are fixedly connected with the locating piece.
5. reaming processing unit (plant) according to claim 1, which is characterized in that the inner wall of the inner cylinder be equipped with radially to
The annular protrusion of interior extension, the positioning plate be equipped at least one tapped through hole, the axis of the tapped through hole with it is described fixed
The axis of position plate is parallel, and hook-type screw is equipped in the tapped through hole, and the hook-type screw includes screw rod and is arranged on the spiral shell
The gripping block of one end of bar, the positioning plate and the gripping block are folded on the annular protrusion.
6. reaming processing unit (plant) according to claim 1, which is characterized in that the positioning plate is equipped at least two positioning
Pin, the inner wall of the inner cylinder are equipped with radially inwardly extending annular protrusion, and it is fixed that the annular protrusion is equipped at least two
Position pin hole, the positioning pin coordinate with the dowel hole.
7. reaming processing unit (plant) according to claim 2, which is characterized in that the axial length L of the guide rod meets：
H≤L≤D
Wherein, D be the inner cylinder internal diameter, H be the outer barrel outer wall to the location hole minimum range.
8. reaming processing unit (plant) according to claim 2, which is characterized in that when the datum hole is close to the outer barrel
When one end is equipped with pilot hole, the axial length L of the guide rod meets：
D-d≤L≤H
Wherein, D be the inner cylinder internal diameter, H be the outer barrel outer wall arrive the location hole minimum range, d be described in lead
To the axial length in hole, the axis of the pilot hole is overlapped with the axis of the location hole.
9. a kind of reaming method, which is characterized in that using such as claim 1-8 any one of them reamings processing unit (plant) reality
Existing, the reaming method includes：
Positioning plate is co-axially located in inner cylinder so that location hole on locating piece is opposite with the datum hole of workpiece to be processed to be set
It puts；
By the clamping portion clamping of process tool on lathe；
By guide rod assembling in the location hole；
The guide rod is controlled to be moved along the axis of the location hole to the direction away from datum hole, makes cutting for the process tool
It cuts portion and reaming processing is carried out to the datum hole.
10. reaming method according to claim 9, which is characterized in that filled in the clamping portion by process tool
Before being clipped on lathe, the reaming method further includes：
First time reaming processing is carried out close to one end of the outer barrel to the datum hole using milling cutter, is oriented to processing
Hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043346.XA CN108067654A (en) | 2017-10-31 | 2017-10-31 | A kind of reaming processing unit (plant) and reaming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043346.XA CN108067654A (en) | 2017-10-31 | 2017-10-31 | A kind of reaming processing unit (plant) and reaming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108067654A true CN108067654A (en) | 2018-05-25 |
Family
ID=62159528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711043346.XA Pending CN108067654A (en) | 2017-10-31 | 2017-10-31 | A kind of reaming processing unit (plant) and reaming method |
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| Country | Link |
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| CN (1) | CN108067654A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023197406A1 (en) * | 2022-04-11 | 2023-10-19 | 山东裕航特种合金装备有限公司 | Machining method and tool for overall hole positions of battery tray of new energy vehicle |
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| CN200974134Y (en) * | 2006-10-31 | 2007-11-14 | 扬动股份有限公司 | Reaming guide sleeve |
| CN201175779Y (en) * | 2008-03-21 | 2009-01-07 | 沈阳飞机工业（集团）有限公司 | Hard metal alloy expanding drill for processing titanium alloy |
| CN102179541A (en) * | 2011-05-10 | 2011-09-14 | 大足县生产力促进中心 | Intersection cross hole processing method |
| CN103111662A (en) * | 2013-01-25 | 2013-05-22 | 陈硕 | Drilling, expanding and hinge guiding device |
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2017
- 2017-10-31 CN CN201711043346.XA patent/CN108067654A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200974134Y (en) * | 2006-10-31 | 2007-11-14 | 扬动股份有限公司 | Reaming guide sleeve |
| CN201175779Y (en) * | 2008-03-21 | 2009-01-07 | 沈阳飞机工业（集团）有限公司 | Hard metal alloy expanding drill for processing titanium alloy |
| CN102179541A (en) * | 2011-05-10 | 2011-09-14 | 大足县生产力促进中心 | Intersection cross hole processing method |
| CN103111662A (en) * | 2013-01-25 | 2013-05-22 | 陈硕 | Drilling, expanding and hinge guiding device |
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| WO2023197406A1 (en) * | 2022-04-11 | 2023-10-19 | 山东裕航特种合金装备有限公司 | Machining method and tool for overall hole positions of battery tray of new energy vehicle |
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Application publication date: 20180525 |