CN205380485U - Process flexible clamp of axle type work piece in batches - Google Patents
Process flexible clamp of axle type work piece in batches Download PDFInfo
- Publication number
- CN205380485U CN205380485U CN201620128651.3U CN201620128651U CN205380485U CN 205380485 U CN205380485 U CN 205380485U CN 201620128651 U CN201620128651 U CN 201620128651U CN 205380485 U CN205380485 U CN 205380485U
- Authority
- CN
- China
- Prior art keywords
- tooth bar
- clamping mechanism
- work piece
- left socle
- workpiece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a process flexible clamp of axle type work piece in batches comprises anchor clamps bottom plate, transposition system, centering location clamping mechanism, additional bearing mechanism and floating installation, during the use, can restrict simultaneously after centering location clamping mechanism and the cooperation of superficial dynamic positioning device and a plurality ofly treated that machining region carries out additional bearing by five degrees of freedom of processing work piece, additional bearing mechanism on to the work piece. On vertical machining center equipment, install 10 diameters in batches for 10mm - 30mm, the length slender axles class work piece for 100 -800mm through these anchor clamps, realize milling, bore, expand, process such as hinge, boring. The advantage: 1. Through replacing portion mechanical product, can realize the increase and decrease of erector's number of packages volume, the range extension of diameter of work, the range extension of work piece length. 2. On the relative cost is than lower vertical machining center, increase by 2 servo motor on the anchor clamps, realize the big batch processing of slender axles class work piece.
Description
Technical field
This utility model relates to the jig Design field of thin and long shafts workpiece.
Background technology
Thin and long shafts workpiece is conventional workpiece, after Excircle machining, it has plane, curved surface, straight hole, taper hole, pin-and-hole etc. need processing.Process program mainly has two kinds: 1. more employing operation decentralization principles, and every operation is designed with special fixture, is processed on common apparatus, and integrated cost is high, efficiency is low.2. adopting operation principle of centrality, be processed on turn-milling complex machining center, input cost is high, and poor quality ensures, overall efficiency is low.
Summary of the invention
This utility model provides the flexible fixture of a kind of batch machining shaft-like workpiece, under the premise ensureing crudy, comprehensively improves working (machining) efficiency, reduces processing cost.
In order to solve above-mentioned technical problem, the technical solution of the utility model is: the flexible fixture of a kind of batch machining shaft-like workpiece, including clamp bottom board, the left plate face of clamp bottom board is provided with left socle, the top of left socle is provided with multiple spaced dead eye, is equipped with left sliding bearing in each dead eye, and the intracavity of left sliding bearing is provided with centering positioning and clamping mechanism, left socle lateral surface is provided with indexing system, and indexing system can simultaneously drive multiple centering positioning and clamping mechanism；The right panel face of clamp bottom board is provided with line slideway, line slideway is provided with spaced apart assistant supporting mechanism and right support, assistant supporting mechanism is between centering positioning and clamping mechanism and right support, assistant supporting mechanism and right support can slide towards centering positioning and clamping mechanism direction, and wherein assistant supporting mechanism is driven by ball screw and motor, right support and clamp bottom board are attached by removably；The top of right support is provided with multiple spaced dead eye, is equipped with right sliding bearing in each dead eye, and the intracavity of right sliding bearing is provided with float positioning device, float positioning device setting corresponding with centering positioning and clamping mechanism；During use, region to be processed on workpiece can be carried out aiding support with the five of limit workpiece to be machined degree of freedom, assistant supporting mechanism after coordinating with float positioning device by centering positioning and clamping mechanism.
Technique scheme is further limited, the structure of described each centering positioning and clamping mechanism is all identical, including rotary sleeve, rotary sleeve is assemblied in the intracavity of left sliding bearing, on rotary sleeve from head to afterbody successively be cased with interior thrust bearing, outer thrust bearing, driven gear and locking nut, interior thrust bearing and outer thrust bearing lay respectively at the two ends place of dead eye, wherein interior thrust bearing and outer thrust bearing adopt interference fit to be connected with rotary sleeve, driven gear adopts key attachment structure to be connected with rotary sleeve, locking nut adopts helicitic texture to be connected with rotary sleeve afterbody；Be provided with spring chuck in the head of rotary sleeve, tail end is provided with hydraulic cylinder, and hydraulic cylinder drives spring chuck that the end of workpiece is clamped/unclamps.The advantage of this structure is: by changing the spring chuck and rotary sleeve felt relieved in positioning and clamping mechanism, can position the slender axles of clamping different-diameter；The application of interior thrust bearing, outer thrust bearing and sliding bearing is to reduce friction, it is simple to transposition and the position of this mechanism are accurate；Key attachment structure is transmission the inserting on whole centering positioning and clamping mechanism of driven gear；Not only it is adjustment axial gap that locking nut and rotary sleeve afterbody adopt helicitic texture to be connected, ensures that the transposition of whole mechanism freely but also avoids the axial float of mechanism；Tail end is provided with hydraulic cylinder, and hydraulic cylinder drives spring chuck that the end of workpiece is clamped/unclamps, and is the automaticity improving flexible fixture, reduces the labor intensity of workman, reduces the clamping time.
Technique scheme is further limited, described float positioning device includes tripping sleeve, tripping sleeve is assemblied in the intracavity of right sliding bearing, outer on the head of tripping sleeve is cased with return spring, afterbody is provided with locking nut, and locking nut is connected with the afterbody employing helicitic texture of tripping sleeve.The advantage of this structure: carry out centering location in spring chuck owing to part end need to have the length of 8mm to put into and clamp, compressible more than the 10mm of return spring when tripping sleeve axial slip, can facilitate the whole centering positioning and clamping mechanism of putting into of part, simultaneously the elastic force of return spring can ensure part end face and the plane decided at the higher level but not officially announced in spring chuck fully in contact with；Tripping sleeve head endoporus is 45 degree of conical surfaces, is outside one's consideration chamfering in the 45 of the right-hand member of applicable different-diameter part.Locking nut adopts helicitic texture to be connected the decrement of fine-tuning return spring with the afterbody of tripping sleeve, it is ensured that have fixing elastic force during clamping.
Technique scheme is further limited, described indexing system includes symmetrically arranged tooth bar left socle and tooth bar right support, tooth bar left socle and tooth bar right support are assemblied on the lateral surface of left socle, the two ends of tooth bar are respectively placed on tooth bar left socle and tooth bar right support, the end face of tooth bar engages with the driven gear in multiple centering positioning and clamping mechanisms, the lateral surface of left socle is provided with driving gear, the bottom surface of tooth bar is engaged with driving gear, drives gear to do straight reciprocating motion by drive motor band carry-over bar.The advantage of this structure: tooth bar left socle and have adjustment structure in tooth bar right support, it is simple to the centering of rack position, adjusting structure is known technology in this area；After tooth bar and driven gear position are determined, gear position can be driven again through guiding mechanism adjustment；Gear is driven to do straight reciprocating motion by drive motor band carry-over bar, tooth bar drives driven tooth crop rotation gyration again, the angle of revolution of such servo drive motor translates into the transposition angle of centering positioning and clamping mechanism, but there is a restriction in this mechanism, and its rotating range is-180 °≤θ≤180 °.Additionally tooth bar is also replaced by synchronous cog belt.
Technique scheme is further limited, described assistant supporting mechanism includes the float support frame that can be assemblied on line slideway, float support frame is connected with ball-screw by internal thread hole thereon, the end face of float support frame is provided with multiple lifting hydraulic cylinder spaced apart, the lifting end of lifting hydraulic cylinder is provided with rocker piece, and the bearing-surface of rocker piece is provided with the floating trough of V-type.The advantage of this structure: float support frame is connected with ball-screw by internal thread hole thereon, and the rocker piece of such V-type according to the difference of part machining area, can carry out position adjustment at any time, improve the rigidity of clamping, reduce deformation, improve crudy, as shown in Figure 9；Lifting hydraulic cylinder ensures that the rocker piece of V-type moves up and down, and above moves on to position and firm, it is provided that aiding support power reliably；Adopting V-type is be suitable for the part of different-diameter, and floating V-arrangement also realized location simultaneously, improve the rigidity of clamping.
Technique scheme is further improved, and the one side of described rocker piece is provided with the cooling fluid apertures communicated with floating trough.Advantage: cause that for avoiding iron filings to be bonded on V-type floating trough V-arrangement auxiliary positioning is forbidden, inside have cooling fluid apertures, coolant can be led to and take away iron filings.
Beneficial effect: 1. improve crudy, by moveable assistant supporting mechanism, improves the rigidity at processed position on workpiece.2. batch clamping, reduces the tool change time of vertical machining centre, reduces machining time, improves working (machining) efficiency.3. flexible fixture, is applicable to the slender axles workpiece of different cultivars, decreases that fixture puts into, lathe puts into, artificial puts into, requires minimum to the technical merit of workman, and integrated cost is minimum.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model.
The left view that Fig. 2 is Fig. 1 is.
Fig. 3 is the top view of Fig. 1.
Fig. 4 is axonometric chart of the present utility model.
Fig. 5 is the centering positioning and clamping mechanism structural representation in this utility model.
Fig. 6 is the centering positioning and clamping mechanism axonometric chart in this utility model.
Fig. 7 is the assistant supporting mechanism structural representation in this utility model.
Fig. 8 is the assistant supporting mechanism axonometric chart in this utility model.
Fig. 9 is use state diagram of the present utility model.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of flexible fixture of batch machining shaft-like workpiece, including clamp bottom board 1, left socle 2 is bolted on the left plate face of clamp bottom board 1, the top of left socle 2 is provided with multiple spaced dead eye, is equipped with left sliding bearing 3 in each dead eye, and the intracavity of left sliding bearing 3 is provided with centering positioning and clamping mechanism 4, left socle 2 silk stocking lateral surface is provided with indexing system 5, and indexing system 5 can simultaneously drive multiple centering positioning and clamping mechanism 4；Line slideway 6 is fixed on the right panel face of clamp bottom board 1 by dormant bolt, line slideway 6 is provided with spaced apart assistant supporting mechanism 7 and right support 8, assistant supporting mechanism 7 is between centering positioning and clamping mechanism 4 and right support 8, assistant supporting mechanism 7 and right support 8 can slide towards centering positioning and clamping mechanism 4 direction, ball screw 9 and motor 10 are arranged between two line slideways 6 and are fixed on clamp bottom board 1, and wherein by ball screw 9 and motor 10 is driven assistant supporting mechanism 7, right support 8 is attached by fixing screw 11 with clamp bottom board 1；The top of right support 8 is provided with multiple spaced dead eye, is equipped with right sliding bearing 12 in each dead eye, and the intracavity of right sliding bearing 12 is provided with float positioning device 13, float positioning device 13 setting corresponding with centering positioning and clamping mechanism 4；During use, region to be processed on workpiece 14 can be carried out aiding support with the five of limit workpiece to be machined 14 degree of freedom, assistant supporting mechanism 7 after coordinating with float positioning device 13 by centering positioning and clamping mechanism 4.
nullAs shown in Figure 5 and Figure 6，The structure of described each centering positioning and clamping mechanism 4 is all identical，Including rotary sleeve 41，Rotary sleeve 41 is assemblied in the intracavity of left sliding bearing 2，On rotary sleeve 41 from head to afterbody successively be cased with interior thrust bearing 42、Outer thrust bearing 43、Driven gear 44 and the first locking nut 45，Interior thrust bearing 42 and outer thrust bearing 43 lay respectively at the two ends place of dead eye，Namely it is provided with interior thrust bearing 42 between the spacing shoulder on rotary sleeve 41 head and left socle 2 medial surface、Outer thrust bearing 43 it is provided with between driven gear 44 and left socle 2 lateral surface，Wherein interior thrust bearing 42 and outer thrust bearing 43 adopt interference fit to be connected with rotary sleeve 41、Driven gear 44 adopts key attachment structure to be connected with rotary sleeve 41、First locking nut 45 adopts helicitic texture to be connected with rotary sleeve afterbody 41；Be provided with spring chuck 46 in the head of rotary sleeve 41, tail end is provided with hydraulic cylinder 47, and hydraulic cylinder 74 drives spring chuck 46 that the end of workpiece 14 is clamped/unclamps, and namely hydraulic cylinder 47 inner piston rod is bolted with the tail end of spring chuck 46.Described float positioning device 13 includes tripping sleeve 131, tripping sleeve 131 is assemblied in the intracavity of right sliding bearing 12, it is cased with return spring 132 outside on the head of tripping sleeve 131, namely return spring 132 is assemblied between the spacing shoulder on tripping sleeve 131 head and right support 8, afterbody is provided with the second locking nut 133, and the second locking nut 133 adopts helicitic texture to be connected with the afterbody of tripping sleeve 131.
As depicted in figs. 1 and 2, described indexing system 5 includes symmetrically arranged tooth bar left socle 51 and tooth bar right support 52, tooth bar left socle 51 and tooth bar right support 52 are assemblied on the lateral surface of left socle 2, the two ends of tooth bar 53 are respectively placed on tooth bar left socle 51 and tooth bar right support 52, the end face of tooth bar 53 engages with the driven gear 44 in multiple centering positioning and clamping mechanisms 4, the lateral surface of left socle 2 is provided with the driving gear 54 that can rotate, the bottom surface of tooth bar 53 is engaged with driving gear 54, drives gear 54 to do straight reciprocating motion by drive motor 55 band carry-over bar 53；Additionally tooth bar is also replaced by synchronous cog belt.
As shown in Figure 7 and Figure 8, described assistant supporting mechanism 7 includes the float support frame 71 that can be assemblied on line slideway 6, float support frame 71 is connected with ball-screw 9 by internal thread hole thereon, the end face of float support frame 71 is provided with multiple lifting hydraulic cylinder 72 spaced apart, the tail end of lifting hydraulic cylinder 72 is fixing with float support frame 71 to be connected, the lifting end of lifting hydraulic cylinder 72 is provided with rocker piece 73, and the bearing-surface of rocker piece 73 is provided with the floating trough 74 of V-type.The one side of described rocker piece 73 is provided with the cooling fluid apertures communicated with floating trough 71, and coolant duct is connected with cooling fluid apertures by union joint 75.
Operation principle:This fixture includes the part such as machinery, electric, hydraulic pressure:
1., by the spring chuck in replacing portion centering positioning and clamping mechanism and rotary sleeve, the slender axles of clamping different-diameter can be positioned；Centering positioning and clamping mechanism coordinate with floating abutment sleeve after energy
Five degree of freedom of location restriction workpiece to be machined；Need to change the rocker piece in assistant supporting mechanism simultaneously, for avoiding iron filings to be bonded on V-type floating trough, inside have cooling fluid apertures, coolant can be led to；
2. by the right support on mobile line slideway, the slender axles of centering positioning and clamping mechanism, float positioning device energy clamping different length can be made, after right support is adjusted in place, by the position of the fixing right support of fixing screw；
3. the assistant supporting mechanism moved on line slideway by ball screw and motor, this mechanism is mobile with the change of Working position, improves the rigidity of clamping, reduces deformation and improves crudy.As shown in Figure 9: during machining area A, assistant supporting mechanism is at region location A；During machining area B, lifting hydraulic cylinder drives rocker piece to move down 15mm, then passes through ball screw and drives assistant supporting mechanism to equilibrate to region B location, then mobile 15mm on lifting hydraulic cylinder lifting rocker piece, make the floating trough on rocker piece and absorption surface, it is achieved the aiding support of new position；
4. owing to fixture is mounted in vertical machining centre, its tool change time is long, reduces tool change time so being installed by batch.The transposition of workpiece drives gear to rotate, be delivered to driven gear by tooth bar by driven by motor, it is achieved multiple centering positioning and clamping mechanism integral-rotations, is achieved in that the synchronous rotary of ten workpiece, and rotating range is-180 °≤θ≤180 °.Owing to gear-driven accuracy is relatively low, the accuracy of gear need to be improved or change Synchronous Belt Drives into.On vertical machining centre equipment, 8-20 part diameter is installed to be Ф 10mm-Ф 30mm, length is the thin and long shafts workpiece of 100-800mm by this fixture batch, it is achieved the technical processs such as milling, brill, expansion, hinge, boring.By removable parts mechanical workpieces, it may be achieved install the expanded range of the increase and decrease of piece count, the expanded range of diameter of work, Workpiece length.
Do not elaborate in this specification part, for technology well known in the art.Described motor and drive motor are servomotor, are controlled by control system.
Claims (6)
1. the flexible fixture of a batch machining shaft-like workpiece, including clamp bottom board, it is characterized in that: the left plate face of clamp bottom board is provided with left socle, the top of left socle is provided with multiple spaced dead eye, left sliding bearing it is equipped with in each dead eye, the intracavity of left sliding bearing is provided with centering positioning and clamping mechanism, and left socle lateral surface is provided with indexing system, and indexing system can simultaneously drive multiple centering positioning and clamping mechanism；The right panel face of clamp bottom board is provided with line slideway, line slideway is provided with spaced apart assistant supporting mechanism and right support, assistant supporting mechanism is between centering positioning and clamping mechanism and right support, assistant supporting mechanism and right support can slide towards centering positioning and clamping mechanism direction, and wherein assistant supporting mechanism is driven by ball screw and motor, right support and clamp bottom board are attached by removably；The top of right support is provided with multiple spaced dead eye, is equipped with right sliding bearing in each dead eye, and the intracavity of right sliding bearing is provided with float positioning device, float positioning device setting corresponding with centering positioning and clamping mechanism；During use, region to be processed on workpiece can be carried out aiding support with the five of limit workpiece to be machined degree of freedom, assistant supporting mechanism after coordinating with float positioning device by centering positioning and clamping mechanism.
2. the flexible fixture of a kind of batch machining shaft-like workpiece according to claim 1, it is characterized in that: the structure of described each centering positioning and clamping mechanism is all identical, including rotary sleeve, rotary sleeve is assemblied in the intracavity of left sliding bearing, on rotary sleeve from head to afterbody successively be cased with interior thrust bearing, outer thrust bearing, driven gear and locking nut, interior thrust bearing and outer thrust bearing lay respectively at the two ends place of dead eye, wherein interior thrust bearing and outer thrust bearing adopt interference fit to be connected with rotary sleeve, driven gear adopts key attachment structure to be connected with rotary sleeve, locking nut adopts helicitic texture to be connected with rotary sleeve afterbody；Be provided with spring chuck in the head of rotary sleeve, tail end is provided with hydraulic cylinder, and hydraulic cylinder drives spring chuck that the end of workpiece is clamped/unclamps.
3. the flexible fixture of a kind of batch machining shaft-like workpiece according to claim 1 or claim 2, it is characterized in that: described float positioning device includes tripping sleeve, tripping sleeve is assemblied in the intracavity of right sliding bearing, be cased with return spring outside on the head of tripping sleeve, afterbody is provided with locking nut, and locking nut adopts helicitic texture to be connected with the afterbody of tripping sleeve.
4. the flexible fixture of a kind of batch machining shaft-like workpiece according to claim 3, it is characterized in that: described indexing system includes symmetrically arranged tooth bar left socle and tooth bar right support, tooth bar left socle and tooth bar right support are assemblied on the lateral surface of left socle, the two ends of tooth bar are respectively placed on tooth bar left socle and tooth bar right support, the end face of tooth bar engages with the driven gear in multiple centering positioning and clamping mechanisms, the lateral surface of left socle is provided with driving gear, the bottom surface of tooth bar is engaged with driving gear, gear is driven to do straight reciprocating motion by drive motor band carry-over bar；Additionally tooth bar is also replaced by synchronous cog belt.
5. the flexible fixture of a kind of batch machining shaft-like workpiece according to claim 4, it is characterized in that: described assistant supporting mechanism includes the float support frame that can be assemblied on line slideway, float support frame is connected with ball-screw by internal thread hole thereon, the end face of float support frame is provided with multiple lifting hydraulic cylinder spaced apart, the lifting end of lifting hydraulic cylinder is provided with rocker piece, and the bearing-surface of rocker piece is provided with the floating trough of V-type.
6. the flexible fixture of a kind of batch machining shaft-like workpiece according to claim 5, it is characterised in that: the one side of described rocker piece is provided with the cooling fluid apertures communicated with floating trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620128651.3U CN205380485U (en) | 2016-02-19 | 2016-02-19 | Process flexible clamp of axle type work piece in batches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620128651.3U CN205380485U (en) | 2016-02-19 | 2016-02-19 | Process flexible clamp of axle type work piece in batches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205380485U true CN205380485U (en) | 2016-07-13 |
Family
ID=56350690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620128651.3U Expired - Fee Related CN205380485U (en) | 2016-02-19 | 2016-02-19 | Process flexible clamp of axle type work piece in batches |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205380485U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538007A (en) * | 2016-02-19 | 2016-05-04 | 湖北汽车工业学院 | Flexible fixture for batch machining of shaft workpieces |
| CN106514372A (en) * | 2016-11-28 | 2017-03-22 | 桐乡市石门仪表机械厂 | Processing fixture for dog bone-shaped wrench |
| CN111230697A (en) * | 2019-11-28 | 2020-06-05 | 佛山市奥达金属制品有限公司 | Automatic camshaft polishing equipment |
-
2016
- 2016-02-19 CN CN201620128651.3U patent/CN205380485U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538007A (en) * | 2016-02-19 | 2016-05-04 | 湖北汽车工业学院 | Flexible fixture for batch machining of shaft workpieces |
| CN106514372A (en) * | 2016-11-28 | 2017-03-22 | 桐乡市石门仪表机械厂 | Processing fixture for dog bone-shaped wrench |
| CN111230697A (en) * | 2019-11-28 | 2020-06-05 | 佛山市奥达金属制品有限公司 | Automatic camshaft polishing equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105538007A (en) | Flexible fixture for batch machining of shaft workpieces | |
| CN201455700U (en) | Dedicated numerical-control axletree drilling machine tool and auxiliary clamping mechanism thereof | |
| CN203599874U (en) | Clamping tool for milling key grooves of shaft parts | |
| CN109648117B (en) | Clamping type drilling device for communication equipment machining | |
| CN201644859U (en) | Crankshaft oil hole processing machine tool | |
| CN104001967A (en) | Numerical control precision micro-fine super-long deep hole drilling machine | |
| CN106141889B (en) | Oil pump gear shaft spiral-flow type barreling finishing processing tool device and method | |
| CN205380485U (en) | Process flexible clamp of axle type work piece in batches | |
| CN111745176A (en) | Combined boring machine and boring processing method | |
| CN105171026A (en) | Machining device with multiple drill bits | |
| CN112207324A (en) | High-precision punching equipment suitable for machining of precise parts | |
| CN112264920A (en) | Vertical inner hole and outer circle honing integrated machine tool | |
| CN212070448U (en) | Drilling device capable of automatically adjusting drilling position | |
| CN108296797A (en) | A kind of boring and milling machine special equipment of processing new-energy automobile rear axle | |
| CN209035975U (en) | A kind of high-precision double-shaft horizontal boring and honing machine bed | |
| CN104907618A (en) | Power milling head of milling bore long key-groove | |
| CN203091791U (en) | Double-main-shaft device with simultaneous cutting and adjustment of distance between shafts being conducted based on deep hole drill machine tool | |
| CN215394578U (en) | Single-shaft type independent-feeding double-grinding-head structure | |
| CN109277608A (en) | A kind of double milling head machinery processing apparatus | |
| CN205325420U (en) | Superfinishing machine | |
| CN212469820U (en) | Combined boring machine | |
| CN207668544U (en) | A kind of double-station drilling machine | |
| CN110576201B (en) | Multi-station feeding type drilling machine | |
| CN212144572U (en) | Numerical control machine tool special for machining oblique and straight oil holes of crankshaft | |
| CN203843227U (en) | Hole machining tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160713 Termination date: 20180219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |