CN106914650A - A kind of processing method of steam turbine outer shell strut screwed hole - Google Patents
A kind of processing method of steam turbine outer shell strut screwed hole Download PDFInfo
- Publication number
- CN106914650A CN106914650A CN201710141683.6A CN201710141683A CN106914650A CN 106914650 A CN106914650 A CN 106914650A CN 201710141683 A CN201710141683 A CN 201710141683A CN 106914650 A CN106914650 A CN 106914650A
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- CN
- China
- Prior art keywords
- workpiece
- strut
- knife bar
- copper sheathing
- processing method
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- 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.)
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/44—Equipment or accessories specially designed for machines or devices for thread cutting
- B23G1/48—Equipment or accessories specially designed for machines or devices for thread cutting for guiding the threading tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention belongs to steam turbine outer shell processing technique field, it is related to a kind of processing method of steam turbine outer shell strut screwed hole.The method is comprised the following steps：Workpiece is combined first is lain on platen downwards, adjust the height of workpiece, the default strut hole and machine tool chief axis for making workpiece are in same horizontal line；Then workpiece is fixed with the mode of four point branch pressures；It is processed again and withdrawing treatment：Knife bar is arranged on the machine tool chief axis, ladder copper sheathing is bumped into the outer cinclides of the strut of workpiece, and knife bar is penetrated in ladder copper sheathing, and the machine tool chief axis mode that follow procedure sets successively drives knife bar to penetrate drilling and tapping that inside workpiece carries out the strut inner wall hole of workpiece, withdrawing, takes out ladder copper sheathing.The crudy of steam turbine outer shell strut screwed hole is the method increase, and processing method of the present invention is compared with the conventional method for being used in the industry at present, improves processing efficiency, reduces labour intensity, and frock less investment in addition, processing cost is low.
Description
Technical field
The invention belongs to steam turbine outer shell processing technique field, it is related to a kind of adding for steam turbine outer shell strut screwed hole
Work method.
Background technology
Influenceed by foundry engieering in steam turbine outer shell casting process, strut is difficult casting, be required to lead at present
Over mechanical processing method strut is penetrated into workpiece after drilling, tapping in the workpiece wall in firm welding again, play casting die cavity branch
Support is acted on, and increases workpiece rigidity, and such accessory size, weight are big, general strut screw thread between M60-M80, threaded spreader bar
Length 1500-2000mm, therefore processing is more difficult, it is easy to cause that screwed hole is wrong partially, the random phenomenon such as button of screw thread.At present in the industry
The processing method of use is that suitable drill bit is installed on floor-type milling ＆ boring machine main shaft, and long enough is used in subdrilling outer wall support hole then
Knife bar, bore, attack inwall support screwed hole, installation center frame at the lengthwise centers of knife bar, when preventing knife bar from processing swing.Due to
By workpiece lumen spacial influence, installation center frame is more difficult, wastes time and energy, and is drilled behind hole and needs to change tap tapping,
Centre frame is easily caused in unloading process is tapped wrong partially, cause drilling and tapping decentraction strut to penetrate, screw thread is disorderly detained
With fall the phenomenon off quality such as tooth, bring very big trouble to the later stage.Therefore a kind of frock simplicity, processing cost how to be designed
The processing method of low and high-quality steam turbine outer shell strut screwed hole turns into the problem of this area urgent need to resolve.
The content of the invention
The present invention is in view of the shortcomings of the prior art, it is proposed that a kind of processing method of steam turbine outer shell strut screwed hole,
Screwed hole is solved because the process-cycle is long, causes quality to ensure and overlength, the problem of Large-scale thread hole forming method blank.
In order to solve the above technical problems, the present invention proposes a kind of processing method of steam turbine outer shell strut screwed hole,
Embodiments in accordance with the present invention, the method is comprised the following steps：1）Prepare before processing：Workpiece is combined and lies in lathe downwards
On workbench, the height of the workpiece is adjusted, the default strut hole and machine tool chief axis for making the workpiece are in same horizontal line；
2）It is installed：The workpiece will be added to fix with the mode of four point branch pressures, the workpiece will not be moved when making processing；3）Processing：By knife
Bar is arranged on the machine tool chief axis, and ladder copper sheathing is bumped into the outer cinclides of the strut of the workpiece, and the knife bar penetrates the rank
In terraced copper sheathing, for preventing the knife bar directly contact workpiece inner wall, cause aperture inaccurate, while injecting lubrication in copper sheathing
Oil, for reducing the frictional force between the knife bar and ladder copper sheathing, the machine tool chief axis mode band that follow procedure sets successively
Moving knife bar penetrate the inside workpiece carry out the workpiece strut inner wall hole drilling and tapping process；4）After machining,
Withdrawing is carried out, the ladder copper sheathing is then taken out.
Inventor's discovery, a kind of the method according to embodiments of the present invention, there is provided steam turbine outer shell strut screwed hole
Processing method, the method increase the crudy of steam turbine outer shell strut screwed hole, and processing side of the present invention
Method improves processing efficiency compared with the conventional method for being used in the industry at present, reduces labour intensity, of the present invention in addition
Processing method is compared with the conventional method for being used in the industry at present, and frock less investment, processing cost is low.
Embodiments in accordance with the present invention, the center in the default strut hole of the workpiece is in the center of the machine tool chief axis
In same horizontal line, the outer cinclides of the strut is through hole, and inner wall hole is screwed hole.
Embodiments in accordance with the present invention, the mode of the 4 points branch pressure is：Make the horizontal and vertical center of the workpiece
Axis, 4 pressure points are chosen in the upper surface of the workpiece, and 4 pressure points symmetrically set according to horizontal and vertical central axis
Put, then chucking device is arranged at 4 pressure points, the fixation that is installed is carried out to the processing workpiece, the workpiece is not produced
Raw displacement or loosening.
Embodiments in accordance with the present invention, bore cinclides outside the strut with workpiece described in boring, make the outer cinclides of strut of the workpiece
Roughness be less than Ra6.3um, and the outer cinclides of the strut with diameter greater than the knife bar diameter 20-30mm.
Embodiments in accordance with the present invention, the ladder copper sheathing is hollow copper sheathing, prevents the wound of grinding of the knife bar, the ladder
The diameter with diameter greater than lower cylindrical of the Upper cylindrical of copper sheathing, the height of the Upper cylindrical is 5mm, the lower cylindrical
Highly it is 50mm, for being inlaid into the outer cinclides of the strut, and preferably, the diameter of the lower partial cylinder of the ladder copper sheathing
Less than cinclides 0.2-0.5mm outside the strut and more than the knife bar diameter 0.2-0.5mm.
At least following beneficial effect of the present invention：
1）There is provided a kind of processing method of steam turbine outer shell strut screwed hole；
2）Processing method of the present invention improves the crudy of steam turbine outer shell strut screwed hole；
3）Processing method of the present invention improves processing efficiency compared with the conventional method for being used in the industry at present, reduces
Labour intensity；
4）Processing method of the present invention compared with the conventional method for being used in the industry at present, frock less investment, processing cost
It is low.
Brief description of the drawings
Fig. 1 is processing method schematic diagram of the present invention.
Wherein, workpiece 1, knife bar 2, ladder copper sheathing Upper cylindrical 3, ladder copper sheathing lower cylindrical 4, machine tool chief axis 5, outer cinclides
6, inner thread hole 7.
Specific embodiment
In order that those skilled in the art more fully understand technical scheme, with reference to specific embodiment to this
Invention is described in further detail.In general, the invention provides a kind of processing of steam turbine outer shell strut screwed hole
Method, the features of the present invention is illustrated below by the example below.
The invention provides a kind of processing method of steam turbine outer shell strut screwed hole, embodiments in accordance with the present invention,
Fig. 1 is processing method schematic diagram of the present invention, and shown in reference picture 1, the method is comprised the following steps：Before being processed first
Prepare：Workpiece 1 is combined and is lain on platen downwards, adjust the height of the workpiece, make the default of the workpiece
The center of strut screwed hole is in same horizontal line with the center of machine tool chief axis 5, is aligned.
Embodiments in accordance with the present invention, the specific species of the lathe is unrestricted, and the present invention is preferably landing boring and milling machine
Bed, is bored and bore hole to the workpiece strut screwed hole.
Embodiments in accordance with the present invention, are then installed：The workpiece will be added to fix with the mode of four point branch pressures, make to add
Workpiece described in man-hour will not be moved, some embodiments of the invention, and the mode of the 4 points branch pressure is：Make the workpiece
Horizontal and vertical central axis, the workpiece upper surface choose 4 pressure points, 4 pressure points are according to horizontal and vertical
It is symmetrical arranged to central axis, then chucking device is arranged at 4 pressure points, the fixation that is installed is carried out to the processing workpiece,
The workpiece is set not produce displacement or loosening.
Embodiments in accordance with the present invention, the specific species of the chucking device is unrestricted, as long as can be by the workpiece
Maintain static.
Embodiments in accordance with the present invention, shown in reference picture 1, are finally processed and withdrawing treatment：Knife bar 2 is arranged on institute
State on machine tool chief axis, some examples of the invention, the length and material of the knife bar is unrestricted, according to real work
Demand is determined, can changed at any time, and high temperature resistant, the rigid material that hardness can be taken high, is bored and workpiece described in boring
The outer cinclides 6 of strut, makes the roughness of the outer cinclides of strut of the workpiece less than Ra6.3um, and the outer cinclides of the strut is straight
Footpath is more than the knife bar diameter 20-30mm；The ladder copper sheathing is hollow copper sheathing, and the ladder copper sheathing is penetrated for the knife bar
Drilled in into the workpiece, using copper material in order to prevent the wound of grinding of the knife bar, the ladder copper sheathing is divided into
Portion's cylinder and lower cylindrical, the diameter with diameter greater than ladder copper sheathing lower cylindrical 4 of ladder copper sheathing Upper cylindrical 3, the top
The height of cylinder is 5mm, and the height of the lower cylindrical is 50mm, for being inlaid into the outer cinclides of the strut, and preferably
, the diameter of the lower partial cylinder of the ladder copper sheathing is less than cinclides 0.2-0.5mm outside the strut and more than the knife bar
Diameter 0.2-0.5mm；The ladder copper sheathing is bumped into the outer cinclides of the strut of the workpiece, is then penetrated the knife bar described
In ladder copper sheathing, for preventing the knife bar directly contact workpiece inner wall, cause aperture inaccurate, the problems such as poor quality, together
When lubricating oil is injected in copper sheathing, for reducing the frictional force between the knife bar and ladder copper sheathing, improve operating efficiency, finally
The machine tool chief axis mode that follow procedure sets successively drives knife bar to penetrate the inside workpiece to be carried out in the strut of the workpiece
The drilling of wall screwed hole 7 and tapping process, after machining, exit knife bar, then take out the ladder copper sheathing.
Inventor's discovery, a kind of the method according to embodiments of the present invention, there is provided steam turbine outer shell strut screwed hole
Processing method, the method increase the crudy of steam turbine outer shell strut screwed hole, and processing side of the present invention
Method improves processing efficiency compared with the conventional method for being used in the industry at present, reduces labour intensity, of the present invention in addition
Processing method is compared with the conventional method for being used in the industry at present, and frock less investment, processing cost is low.
Detailed Jie has been carried out to a kind of processing method of steam turbine outer shell strut screwed hole provided by the present invention above
Continue, be set forth the step of embodiment used herein is to the application, the explanation of above example is only intended to help and manages
Solution the present processes and its core concept；Simultaneously for those of ordinary skill in the art, according to the thought of the application,
Be will change in specific embodiment and range of application, in sum, this specification content should not be construed as to this Shen
Limitation please.
Claims (5)
1. a kind of processing method of steam turbine outer shell strut screwed hole, it is characterised in that comprise the following steps：
1) prepare before processing：Workpiece is combined and is lain on platen downwards, adjust the height of the workpiece, made described
The default strut hole of workpiece is in same horizontal line with machine tool chief axis；
2) it is installed：The workpiece will be added to fix with the mode of four point branch pressures, the workpiece will not be moved when making processing；
3) process：Knife bar is arranged on the machine tool chief axis, ladder copper sheathing is bumped into the outer cinclides of the strut of the workpiece, described
Knife bar is penetrated in the ladder copper sheathing, for preventing the knife bar directly contact workpiece inner wall, causes aperture inaccurate, while
Injection lubricating oil in copper sheathing, for reducing the frictional force between the knife bar and ladder copper sheathing, the machine tool chief axis press journey successively
Sequence setting mode drive knife bar penetrate the inside workpiece carry out the workpiece strut inner wall hole drilling and tapping process；
4）After machining, withdrawing is carried out, then take out the ladder copper sheathing.
2. processing method according to claim 1, it is characterised in that the center in the default strut hole of the workpiece with it is described
The center of machine tool chief axis is in same horizontal line, and the outer cinclides of the strut is through hole, and inner wall hole is screwed hole.
3. processing method according to claim 1, it is characterised in that the mode of the 4 points branch pressure is：Make the work
The horizontal and vertical central axis of part, the workpiece upper surface choose 4 pressure points, 4 pressure points according to laterally with
Longitudinal center axis is symmetrical arranged, and then chucking device is arranged at 4 pressure points, and the processing workpiece be installed admittedly
It is fixed, the workpiece is not produced displacement or loosening.
4. processing method according to claim 1, it is characterised in that bore and workpiece described in boring the outer cinclides of strut, make institute
The roughness of the outer cinclides of strut of workpiece is stated less than Ra6.3um, and the outer cinclides of the strut with diameter greater than the knife bar diameter
20-30mm。
5. processing method according to claim 1, it is characterised in that the ladder copper sheathing is hollow copper sheathing, prevents described
Knife bar grinds wound, the diameter with diameter greater than lower cylindrical of the Upper cylindrical of the ladder copper sheathing, the height of the Upper cylindrical
It is 5mm, the height of the lower cylindrical is 50mm, for being inlaid into the outer cinclides of the strut, and preferably, the ladder copper
The diameter of the lower partial cylinder of set is less than cinclides 0.2-0.5mm outside the strut and more than the knife bar diameter 0.2-0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141683.6A CN106914650A (en) | 2017-03-10 | 2017-03-10 | A kind of processing method of steam turbine outer shell strut screwed hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710141683.6A CN106914650A (en) | 2017-03-10 | 2017-03-10 | A kind of processing method of steam turbine outer shell strut screwed hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106914650A true CN106914650A (en) | 2017-07-04 |
Family
ID=59461191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710141683.6A Pending CN106914650A (en) | 2017-03-10 | 2017-03-10 | A kind of processing method of steam turbine outer shell strut screwed hole |
Country Status (1)
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|---|---|
| CN (1) | CN106914650A (en) |
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| DE20221719U1 (en) * | 2002-07-11 | 2007-03-15 | Ginzinger, Helmut | Guide attachment for centering and guiding thread-cutting drill has two resting surfaces on underside of fixing element |
| CN101559541A (en) * | 2009-05-19 | 2009-10-21 | 武汉钢铁(集团)公司 | Test method and device for weld seam alloying in gas shielded welding |
| CN201558976U (en) * | 2009-09-09 | 2010-08-25 | 中原特种车辆有限公司 | Deep hole boring and cutting auxiliary device |
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| CN204565211U (en) * | 2014-12-17 | 2015-08-19 | 安徽池州家用机床股份有限公司 | A kind of nut seat boring grab |
| CN205605646U (en) * | 2016-04-22 | 2016-09-28 | 滁州职业技术学院 | Guide pillar copper sheathing structure |
| CN205651103U (en) * | 2016-04-30 | 2016-10-19 | 北京仁通永盛机械设备有限公司 | Elastic fixture |
| CN205852317U (en) * | 2016-06-28 | 2017-01-04 | 吴江市亨达机械配件有限责任公司 | New forms of energy controller processing jig |
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2017
- 2017-03-10 CN CN201710141683.6A patent/CN106914650A/en active Pending
Patent Citations (15)
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| DE20221719U1 (en) * | 2002-07-11 | 2007-03-15 | Ginzinger, Helmut | Guide attachment for centering and guiding thread-cutting drill has two resting surfaces on underside of fixing element |
| US20050025587A1 (en) * | 2003-07-28 | 2005-02-03 | Xiao Tony Xin | Optical lens hole drilling guider |
| CN101559541A (en) * | 2009-05-19 | 2009-10-21 | 武汉钢铁(集团)公司 | Test method and device for weld seam alloying in gas shielded welding |
| CN201558976U (en) * | 2009-09-09 | 2010-08-25 | 中原特种车辆有限公司 | Deep hole boring and cutting auxiliary device |
| CN102114601A (en) * | 2009-12-31 | 2011-07-06 | 山西晋西精密机械有限责任公司 | Special clamp for manufacturing lateral frame of railway vehicle |
| CN202779893U (en) * | 2012-07-27 | 2013-03-13 | 宁夏共享集团有限责任公司 | Tool for correcting back overlength cast pits of flanges |
| CN202833657U (en) * | 2012-10-19 | 2013-03-27 | 无锡市百顺机械厂 | Copper cover capable of effectively using lubrication oil |
| CN104439386A (en) * | 2014-11-18 | 2015-03-25 | 山西北方机械制造有限责任公司 | Machining device for inclined small-diameter long hole |
| CN204308642U (en) * | 2014-12-04 | 2015-05-06 | 四川川钨硬质合金有限公司 | A kind of fixture of horizontal milling carbide alloy end face of shaft bush |
| CN204565211U (en) * | 2014-12-17 | 2015-08-19 | 安徽池州家用机床股份有限公司 | A kind of nut seat boring grab |
| CN204353539U (en) * | 2014-12-23 | 2015-05-27 | 新兴重工湖北三六一一机械有限公司 | A kind of boring attacks two-used clip |
| CN204449424U (en) * | 2015-02-10 | 2015-07-08 | 内蒙古第一机械集团有限公司 | A kind of drill bushing |
| CN205605646U (en) * | 2016-04-22 | 2016-09-28 | 滁州职业技术学院 | Guide pillar copper sheathing structure |
| CN205651103U (en) * | 2016-04-30 | 2016-10-19 | 北京仁通永盛机械设备有限公司 | Elastic fixture |
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| PB01 | Publication | ||
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Application publication date: 20170704 |