CN103801711A - Spindle head with improved structure - Google Patents
Spindle head with improved structure Download PDFInfo
- Publication number
- CN103801711A CN103801711A CN201310544949.3A CN201310544949A CN103801711A CN 103801711 A CN103801711 A CN 103801711A CN 201310544949 A CN201310544949 A CN 201310544949A CN 103801711 A CN103801711 A CN 103801711A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- mentioned
- main tapping
- main shaft
- main
- 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.)
- Pending
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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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
-
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/043—Accessories for spindle drives
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
- B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles
-
- 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
- B23Q2705/00—Driving working spindles or feeding members carrying tools or work
- B23Q2705/02—Driving working spindles
- B23Q2705/023—General aspects of driving a boring spindle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Turning (AREA)
Abstract
The invention provides a spindle head with an improved structure. The spindle head is protrudingly arranged one side of a machine tool and rotationally supports a tool. The spindle head includes a main shaft which has one end connected into the machine tool to receive rotation forces and the other end protruding outside the machine tool, and is provided with a tool inserting hole for installing a tool, a bearing arranged on the outer periphery of the other end of the main shaft, a sleeve for supporting the other end of the main shaft, a spindle head housing which is connected with the flange of the sleeve in a state for receiving one end of the sleeve and supports the spindle head, and a reinforcing part which is connected with the sleeve in a state for receiving the other end of the sleeve and reinforces the rigidity of the spindle head and the supporting forces.
Description
Technical field
Embodiments of the invention relate to the main tapping that has improved structure, particularly, relate to following main tapping: have strengthening part, and compared with existing main tapping, manufacturing process is simpler, cost saving, compared with existing main tapping, refrigerating function and intensity are improved.
Background technology
Lathe refers to and utilizes proper implements to be processed into shape and size metal or nonmetallic raw material (below referred to as base material) by various machining methods or non-machining method or for carrying out the machinery of more accurate processing.
Particularly, according to the mode of processing base material, such lathe is roughly divided into the machining of the mode that produces chip (chip) and does not produce the non-cutting way processing and forming of chip.Thereby, the lathe that produces chip in process is called to stock-removing machine, the non-stock-removing machine that does not produce chip in process is called to molding machine.
The machining center (Machining Center) that above-mentioned stock-removing machine is roughly divided into the turning center (Turning Center) that base material rotates and fixing instrument moves and process and instrument rotates and base material moves and process.
In machining, the boring machine in above-mentioned machining center carries out circle and processes the work expanding as main purpose take the hole for prior formation, machining object is arranged on workbench or base plate, and rotary drilling operates with instrument.
Such boring machine has the main tapping of erecting tools, above-mentioned main tapping is supported in column, can move up and down along Y direction, before column, there is the workbench for erector crop, workbench can move to the X-direction as left and right directions with as the Y direction of fore-and-aft direction, and the main shaft in above-mentioned main tapping is arranged to move along the W direction parallel with Z-direction.
The following describes the main-shaft head structure of above-mentioned boring machine.
Fig. 1 shows the sectional view of the structure of existing main tapping 10.
In order to process base material, such main shaft 11 is from the length of lathe 1 outstanding regulation.Outstanding like this part is called to main tapping 10.
At the main shaft 11 of above-mentioned main tapping 10, although an end of main shaft 11 is fixed on lathe 1, the other end is free end, is not supported, therefore in order to realize the Precision Machining of base material, should there be shake the other end of above-mentioned main shaft 11 yet contact rotation during with base material.
Thereby, in order to support the other end of heavier main shaft 11, existing main tapping 10 comprises: accommodate the sleeve 13 the other end of above-mentioned main shaft 11 once supporting and accommodate such sleeve 13 and secondary supports the main tapping shell 14 of the other end of above-mentioned main shaft 11.
, above-mentioned sleeve 13 and main tapping shell 14 be securely fixed in a side of lathe 1, supports the other end of above-mentioned main shaft 11.In such structure, for above-mentioned main shaft 11 is rotated, between the other end of the main shaft 11 of rotation and fixing sleeve 13, be provided with bearing 12.Particularly, such bearing 12 is made up of angular contact ball bearing (angular contact ball bearing).
Above-mentioned bearing 12 is arranged between fixing sleeve 13 and the main shaft 11 of rotation, kinetic energy is transformed to the parts of heat energy, if shelved for a long time, the durability of product entirety is brought to impact.
Thereby, on the outer peripheral face of above-mentioned sleeve 13, be formed with cooling collar (cooling jacket) 13a that multiple grooves are communicated with along outer peripheral face.Each groove of above-mentioned cooling collar 13a maintains air-tightness by the inner peripheral surface of above-mentioned main tapping shell 14, cold oil is flowed, cooling above-mentioned main tapping 10.
In addition, the cold oil that flows through above-mentioned cooling collar 13a is supplied to above-mentioned cooling collar 13a by being formed on the cooling oil path 14a of main tapping shell 14.
In above-mentioned existing main tapping 10, sleeve 13 and main tapping shell 14 are formed as respectively single-piece (one-piece), therefore, have problem below.
Work in-process requires main tapping 10 to approach the central portion of the workbench (not shown) that is fixed with base material in the heart sometimes., in the time of processing base material, need to be worked into the central portion of base material time, the length of main tapping 10 should than above-mentioned base material from a face to central distance, under these circumstances, if extend the length of above-mentioned main tapping 10, need again to manufacture the mould of above-mentioned main tapping 10 inscapes, especially sleeve 13 and main tapping shell 14.
And even if the axial length of main tapping 10 is elongated, also, because existing main tapping 10 is made up of sleeve 13 and the main tapping shell 14 of single-piece, therefore, the free end of main tapping 10 has a down dip and increases moment to counter clockwise direction.Thereby cause the free end of main tapping 10 to rock, be difficult to realize the Precision Machining of base material.
And, as depicted in figs. 1 and 2, need to process bolt connecting hole, the cooling oil path 14a etc. for various connections at front face a, the b of main tapping 10, but, if the axial length of main tapping 10 is elongated, need to manufacture by way of parenthesis T shape cutter (T-cutter) or the drill bit (drill) etc. for the such as major axis of machining hole, thereby cause the raising of the manufacturing cost of lathe 1.
And existing sleeve 13 and main tapping shell 14 are bolted mode combination at free end, but O shape circle (O-ring) 5 for preventing that cold oil from leaking must be installed on this faying face.Thereby, as shown in Figure 1, maximum bearing 12 and the above-mentioned cooling collar 13a of heating can only be separated by a distance to setting.According to such structure, cannot realize cooling effectiveness.
Summary of the invention
Embodiments of the invention propose in order to address the above problem, and a kind of main tapping that can save the manufacturing expense due to extending length is provided.
And embodiments of the invention can provide the main tapping of a kind of cooling effectiveness higher than the cooling effectiveness of existing main tapping.
And, even if embodiments of the invention can provide a kind of extending length also to have the main tapping of good rigidity.
According to embodiments of the invention, main tapping, its outstanding lathe one side that is arranged on, and supporting tool rotatably, and improve structure, having comprised: main shaft, one end is connected to above-mentioned lathe inside and is subject to transmitting the revolving force of coming, the other end is outside outstanding to lathe, and this main shaft is for erecting tools; Bearing, it is arranged on the outer peripheral face of the other end of above-mentioned main shaft; Sleeve, it accommodates the other end and the bearing of above-mentioned main shaft, and comprises flange, and this flange is outstanding formation of central portion of the outer peripheral face of this sleeve; Main tapping shell, it is connected with the state of one end and the flange of above-mentioned sleeve of accommodating above-mentioned sleeve, supports main shaft head; And strengthening part, its state with the other end of accommodating above-mentioned sleeve is connected with above-mentioned sleeve, for strengthening rigidity and the support force of main tapping.
Above-mentioned sleeve forms cooling collar on the outer peripheral face of accommodating above-mentioned bearing, and this cooling collar is made up of multiple grooves, and cold oil can be flowed.
The flange of above-mentioned main tapping shell, above-mentioned strengthening part and above-mentioned sleeve is formed with respectively cooling oil path, when this cooling oil path interconnects be communicated with and can make cold oil flow.
According to the improvement of the embodiment of the present invention main tapping of structure, in the time of needs extending length, compared with prior art can improve productivity.
And, according to the improvement of the embodiment of the present invention main tapping of structure, can have bearing sleeve outer peripheral face form cooling collar, can improve cooling effectiveness.
And, according to the improvement of the embodiment of the present invention main shaft of structure, even in the time of extending length, also can suppress base material machining accuracy decline.
Accompanying drawing explanation
Fig. 1 shows the sectional view of the main-shaft head structure of existing boring machine.
Fig. 2 shows the front view of the lathe of existing boring machine.
Fig. 3 shows the sectional view of the main-shaft head structure of boring machine according to an embodiment of the invention.
Label declaration
11: main shaft
100: main tapping
110:O shape circle (O-ring)
120: bearing
130: sleeve
131: cooling collar
133: flange
140: main tapping shell
The specific embodiment
Below, describe in detail according to one embodiment of the invention with reference to accompanying drawing.
The in the situation that of special definition not, all terms in this description and understood by one of ordinary skill in the art common equivalent in meaning, if the term of this description use while conflicting with the common meaning of this term, is explained according to the definition in this description.
In addition, the invention the following describes, for embodiments of the invention are described, does not limit claim scope of the present invention, and the identical symbol using in whole description represents identical inscape.
As mentioned above, embodiments of the invention relate to improve the problem existing in existing main tapping improvement the main tapping of structure, below, the structure of main tapping is according to an embodiment of the invention described.
Fig. 3 shows the sectional view of the main-shaft head structure of boring machine according to an embodiment of the invention.
Roughly comprise main shaft 11, bearing 120, sleeve 130, main tapping shell 140 and strengthening part 150 according to the main tapping 100 of one embodiment of the invention.
One end of main shaft 11 can be fixedly connected to lathe 1 inside, has revolving force by spindle drive motor (not shown) transmission arranging directly or indirectly.The other end of such main shaft 11 is outside outstanding to lathe 1, forms free end, is formed with the tool insert hole 11a for erecting tools at the end of the other end of main shaft 11.
, main shaft 11 inserts the instrument for processing base material in tool insert hole 11a, and by utilize hydraulic pressure clamp or the chuck 11b setting tool of back off tool after, accept revolving force from spindle drive motor, make instrument contact rotation afterwards with base material, thus processing base material.
In addition, the main shaft 11 of rotary actuation is housed in the sleeve 130 illustrating below and is supported, to prevent that the other end (free end) from rocking.Such sleeve 130 does not rotate, and therefore, is provided with bearing 120 on the outer peripheral face of main shaft 11.
Consider that the other end of main shaft 11 exposes as free end, preferably, bearing 120 is arranged on the end of the other end of main shaft 11, thus rocking while preventing that main shaft 11 from rotating.For supports main shaft 11, except the above-mentioned position that bearing 120 is set, can also there is bearing 120 in a side of main shaft 11.
In addition, in one embodiment of this invention, strengthen the free-ended support force of main shaft 11 below by the strengthening part 150 illustrating, therefore, preferably, bearing 120 is made up of higher than the taper roll bearing (taper roller bearing) of the angular contact ball bearing (angular contact ball bearing) using now rigidity according to an embodiment of the invention.This is because the axial length of main tapping 100 becomes longer, and when the rigidity of the bearing 120 of the load of the other end of a supports main shaft 11 is weak, bearing 120 will be more yielding, cannot realize its function.
In addition, sleeve 130 is accommodated the other end and bearing 120, the other end of secondary supports main shaft 11 and the bearing 120 of main shaft 11.On the outer peripheral face of such sleeve 130, be formed with the cooling collar 131 being formed by multiple grooves, wherein flow through cold oil, to reduce the heat producing when main shaft 11 rotates.
In addition, as mentioned above, be connected with main tapping shell 140 by bolt etc. at the free end of main tapping 100 according to the sleeve 130 of prior art, and in order to prevent that cold oil from leaking, O shape circle (o-riong) 5(need to be set referring to Fig. 1 at the end of sleeve 130), in such structure, there is the problem that cannot form cooling collar 131 on the outer peripheral face of sleeve 130 of accommodating bearing 120., existing main tapping has problems on the position that cooling collar is set.
On the contrary, in one embodiment of this invention, cooling collar 131 can be formed on the outer peripheral face of sleeve 130 of accommodating bearing 120.This is because the connecting portion of branch sleeve 130 of the present invention and main tapping shell 140, flange 133 is arranged on other positions with other shapes.
Particularly, in order to connect main tapping shell 140, sleeve 130 is also included in the outstanding flange 133 forming of central portion of outer peripheral face.The flange 133 of sleeve 130 and main tapping shell 140, by connections such as bolts, as shown in the figure, are provided with two O shape circles 110 at such joint face., main tapping shell 140 is connected at central portion with sleeve 130, rather than connects at free end, therefore, can remove the interference for preventing the O shape circle that cold oil leaks, cooling collar 131 can be formed on the outer peripheral face of sleeve 130 of accommodating bearing 120.Compared with existing main tapping 100, can realize outstanding cooling effect according to this structure.
In addition, main tapping shell 140 is securely fixed in a side of lathe 1, be connected with the state of an end and the flange 133 of sleeve 130 of accommodating sleeve 130, thus final supports main shaft 100.
In order to realize object of the present invention, main tapping 100 comprises strengthening part 150 according to an embodiment of the invention, this strengthening part 150 is to accommodate the other end of sleeve 130 and the state of bearing 120 is connected with sleeve 130, for strengthening rigidity and the support force of main tapping 100.
Strengthening part 150 is connected with the flange 133 of sleeve 130, and its connected mode can adopt firmly bolt connecting mode, but is not limited thereto.
And in order to improve rigidity and the support force of main tapping 100 according to an embodiment of the invention, preferably, strengthening part 150 is made up of the high heat-treated steel of rigidity.
In addition, for supports main shaft 11, sleeve 130 is connected with main tapping shell 140, and sleeve 130 is while being connected with strengthening part 150, cooling collar 131 seals by the inner peripheral surface of strengthening part 150 and main tapping shell 140 respectively, forms the flowable oil circuit of cold oil.Be respectively formed at flange 133, the strengthening part 150 of main tapping shell 140, sleeve 130 for introduce cooling oil path 133a, 140a, the 150a of cold oil to such cooling collar 131, in the time that the flange 133 of main tapping shell 140, strengthening part 150 and sleeve 130 interconnects, be communicated with and cold oil is flowed, thereby being incorporated into cooling collar 131.
In addition, the part that is communicated with at each cooling oil path 133a, 140a, 150a, the two sides of flange 133 can arrange O shape circle 110, in case leak-stopping oil.
In a word, the present invention unlike the prior art, is not that each sleeve 130 and the main tapping shell 140 by being formed as single-piece (one-piece) supports spindle nose 100, but strengthening part 150 is included and supports main shaft 100.
In said structure, in the time need to extending the direction of principal axis length of main tapping 100, as long as extend the length of strengthening part 150, the length that can extend whole main tapping 100.At this moment, even if extended the length of main tapping 100, do not need the change of main tapping shell 140 and sleeve 130 yet, and, compared with existing direction of principal axis length, its contraction in length be equivalent to the amount of the length of strengthening part 150, be conducive to manufacture.For example, can utilize existing instrument to form the holes such as cooling water channel., unlike the prior art, in the time extending main tapping 100 length, without manufacturing separately machining tool.And, shorten free-ended length, can further improve the support force of main shaft 11.
According to the improvement of above-mentioned one embodiment of the invention the main tapping of structure, can on the same line, relatively be located on lathe, so as can both direction process simultaneously symmetric form compared with farm labourer crop.
By above-mentioned explanation, as long as those skilled in the art, can understand in the situation that not departing from technological thought scope of the present invention and can change and revise, the content that technical scope of the present invention is not limited to record in above-described embodiment, and limited by claims and the scope reciprocity with it.
Claims (3)
1. improved a main tapping for structure, it is outstanding is arranged on lathe one side, and supporting tool rotatably,
This main tapping that has improved structure is characterised in that and comprises:
Main shaft, one end is connected to the inside of above-mentioned lathe and is subject to transmitting the revolving force of coming, and the other end is outside outstanding to lathe, and this main shaft is for erecting tools;
Bearing, it is arranged on the outer peripheral face of the other end of above-mentioned main shaft;
Sleeve, it accommodates the other end and the bearing of above-mentioned main shaft, and comprises flange, and this flange is outstanding formation of central portion of the outer peripheral face of this sleeve;
Main tapping shell, it is connected with the state of one end and the flange of above-mentioned sleeve of accommodating above-mentioned sleeve, supports main shaft head; And
Strengthening part, its state with the other end of accommodating above-mentioned sleeve is connected with above-mentioned sleeve, for strengthening rigidity and the support force of main tapping.
2. the main tapping that improves structure according to claim 1, is characterized in that,
Above-mentioned sleeve forms cooling collar on the outer peripheral face of having accommodated above-mentioned bearing, and this cooling collar is made up of multiple grooves, and cold oil can be flowed.
3. the main tapping that improves structure according to claim 1, is characterized in that,
On the flange of above-mentioned main tapping shell, above-mentioned strengthening part and above-mentioned sleeve, be formed with respectively cooling oil path, when this cooling oil path interconnects be communicated with and can make cold oil flow.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0125141 | 2012-11-07 | ||
| KR1020120125141A KR20140059322A (en) | 2012-11-07 | 2012-11-07 | Spindle head with improved structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103801711A true CN103801711A (en) | 2014-05-21 |
Family
ID=50699364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310544949.3A Pending CN103801711A (en) | 2012-11-07 | 2013-11-06 | Spindle head with improved structure |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20140059322A (en) |
| CN (1) | CN103801711A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108136558A (en) * | 2015-10-16 | 2018-06-08 | 马自达汽车株式会社 | The control device of lathe |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105150005B (en) * | 2015-08-18 | 2018-03-20 | 长飞光纤光缆股份有限公司 | A kind of composite shaft system for vertical feeding mechanism |
| KR101726400B1 (en) * | 2016-03-30 | 2017-04-13 | (주)기흥기계 | Extend the head with hydraulic automatic switching equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03142142A (en) * | 1989-10-27 | 1991-06-17 | Yamazaki Mazak Corp | Spindle structure of machine tool |
| JPH09257037A (en) * | 1996-03-26 | 1997-09-30 | Toshiba Mach Co Ltd | Spindle head for machine tool |
| CN2294801Y (en) * | 1997-09-23 | 1998-10-21 | 史景璋 | High-precision high-speed drilling-cutting pneumatic master shaft |
| CN201239807Y (en) * | 2008-08-19 | 2009-05-20 | 天津市精诚机床制造有限公司 | Labyrinth type gas-tight sealing apparatus for machine tool main spindle |
| CN201906832U (en) * | 2010-12-09 | 2011-07-27 | 王升辉 | Main spindle device |
-
2012
- 2012-11-07 KR KR1020120125141A patent/KR20140059322A/en not_active Application Discontinuation
-
2013
- 2013-11-06 CN CN201310544949.3A patent/CN103801711A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03142142A (en) * | 1989-10-27 | 1991-06-17 | Yamazaki Mazak Corp | Spindle structure of machine tool |
| JPH09257037A (en) * | 1996-03-26 | 1997-09-30 | Toshiba Mach Co Ltd | Spindle head for machine tool |
| CN2294801Y (en) * | 1997-09-23 | 1998-10-21 | 史景璋 | High-precision high-speed drilling-cutting pneumatic master shaft |
| CN201239807Y (en) * | 2008-08-19 | 2009-05-20 | 天津市精诚机床制造有限公司 | Labyrinth type gas-tight sealing apparatus for machine tool main spindle |
| CN201906832U (en) * | 2010-12-09 | 2011-07-27 | 王升辉 | Main spindle device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108136558A (en) * | 2015-10-16 | 2018-06-08 | 马自达汽车株式会社 | The control device of lathe |
| CN108136558B (en) * | 2015-10-16 | 2019-12-24 | 马自达汽车株式会社 | Control device for machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140059322A (en) | 2014-05-16 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160718 Address after: Gyeongnam Changwon City, South Korea Applicant after: DOOSAN MACHINE TOOL CO., LTD. Address before: Inchon, South Korea Applicant before: Doosan Infracore Co., Ltd. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |