CN109396764A - A kind of processing method of mixed-flow block cast runner - Google Patents
A kind of processing method of mixed-flow block cast runner Download PDFInfo
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- CN109396764A CN109396764A CN201811369927.7A CN201811369927A CN109396764A CN 109396764 A CN109396764 A CN 109396764A CN 201811369927 A CN201811369927 A CN 201811369927A CN 109396764 A CN109396764 A CN 109396764A
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- blade
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- cast runner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Hydraulic Turbines (AREA)
Abstract
The present invention relates to a kind of processing methods of mixed-flow block cast runner, include: the acquisition of block cast runner digital-to-analogue: carrying out point cloud acquisition with crown, lower ring and blade of the three coordinate measurement machines to block cast runner, point is converged and is fitted to block cast runner blank model to be processed, according to blank model and block cast runner drawing digital-to-analogue machining programming；Crown, lower ring slightly add；The processing of blade outlet type face；With universal milling head by the way of Z-Level Milling, unshielding face is slightly added to position, then is respectively processed each blade shielding surface in place by the way of fixing axle profile；Blade water inlet is processed in type face: machining is in place from level to level in runner radial direction ecto-entad for type face when each blade being intake respectively with boring and milling machine；Crown, lower ring finishing and etc., the present invention realizes the processing of mixed-flow block cast runner entirety complex leaf molded line, improves the precision of block cast runner integral blade profile processing, saves processing cost, ensure that the processing quality of block cast runner.
Description
Technical field
The present invention relates to field of machining, and in particular to a kind of Francis turbine block cast runner processing method.
Background technique
As depicted in figs. 1 and 2, mixed-flow block cast runner refers to crown, runner bucket and it is lower ring whole cast one it is whole
Body, since casting section thickness difference is big after block cast, so that deformation is big, blade processing surplus is uneven.After the processing of blade outlet type face
Blade adjacent spacing size is circumferentially arranged unevenly, blade and blade be overlapped mutually sheltering part cutter shaft interference processing less than,
It is unable to satisfy the requirement of geometric tolerances accuracy between whole runner bucket and blade, influences turbine efficiency and stability.It wants
Guarantee overall dimensions tolerance after processing, the establishment of manufacture process programme and nc program and process tool parameter really
It is all very big to determine difficulty, the processing method that the prior art does not have block cast runner is not also related to overall processing for a group runner for weldering,
Usually the group face of weld processing of each blade, the group face of weld of crown, lower ring is welded afterwards in place respectively.
Summary of the invention
It is whole that the present invention provides a kind of mixed-flow aiming at the problem that in the prior art without providing block cast runner processing method
Cast runner processing method, this method by blank entity computation model, to all blades in runner upper water-out side simultaneously on to
Under process layer by layer, cutter interference is handled in advance in process, can guarantee inlet edge of runner blade and outlet edge molded line
Machining accuracy, and guarantee multiple adjacent blades spacing dimension tolerances, have tool sharpening track sky knife less, cutter
The reliable advantage in track, reduces processing cost, improves processing efficiency.
A kind of processing method of mixed-flow block cast runner, comprising:
The acquisition of block cast runner digital-to-analogue: carrying out three-dimensional coordinate detection with blank of the three coordinate measurement machines to block cast runner, turns to block cast
The crown of wheel, lower ring and blade carry out point cloud acquisition, and point is converged and is fitted to block cast runner blank model to be processed, according to hair
Mold type and block cast runner drawing digital-to-analogue machining programming；
Crown, lower ring slightly add: slightly add to the outer surface of crown, lower ring；
Blade outlet type face processing: with universal milling head by the way of Z-Level Milling, from level to level by all blade outlets
Exposed unshielding face is slightly added to position, by after the equal completion of processing of each blade layer at one layer of every processing, reprocesses next
Layer, the vaned unshielding face of institute after processing is completed, then rotary cutter, respectively by each leaf by the way of fixing axle profile
Piece generates the shielding surface blocked processing in place because of blade and blade overlapping；
Blade water inlet side type face processing: the centre of gyration of block cast runner is overlapped with the rotary table center of boring and milling machine, respectively
By the type face on each blade water inlet side, in runner radial direction ecto-entad, machining is in place from level to level；
Crown, lower ring finishing: finishing is carried out to the outer surface of crown, lower ring.
Further, in order to balance processing efficiency and processing quality, the blade water inlet side type face procedure of processing and crown,
Between lower ring finishing step further include:
Half finishing of blade outlet type face: using the method processed with blade outlet type face, the climb cutting processing of Z-Level Milling
Mode first processes unshielding face, shielding surface is reprocessed, to remove the remaining chipping allowance of roughing；
The finishing of blade outlet type face: finishing repairs cisoid line face by the way of Z-Level Milling, the milling of axis Mixed Zone.
As limitation of the invention further, the crown, lower ring outer surface refer to crown, lower ring not with blade
The face of connection, that is, crown flange end face, the periphery of crown flange, each end face of lower ring, lower ring periphery.
Further, the step of block cast runner digital-to-analogue acquires is included in into water side and outlet edge selection selects 3- respectively
4 coordinate points are as blade basis points.
Further, the step of blade outlet type face processes is including the use of the levelling institute of the blade basis points
State runner.
Further, the lowermost layer of the step aparallelepipedal contour Milling Machining of blade outlet type face processing is that cutter is not sent out
It is raw to interfere be capable of processing position.
Further, the crown, lower ring slightly add step, blade outlet type face procedure of processing, blade water inlet side
Carry out the processing of processing program dynamic simulation before type face procedure of processing and crown, the processing of lower ring finishing step with guarantee processing program without
Accidentally.
Further, before half finishing step of blade outlet type face and blade outlet type face finishing step are processed
The processing of processing program dynamic simulation is carried out to guarantee that processing program is errorless.
The present invention realizes the processing of mixed-flow block cast runner entirety complex leaf molded line, to blade outlet type face into
When row finishing, directly it is loaded on the table, thus it is high in machining efficiency, using fixed-lag Kalman smoother method to outlet edge type face
It is processed, improves the precision of block cast runner integral blade profile processing, save processing cost, ensure that adding for block cast runner
Working medium amount.Processing method of the present invention is suitable for different types of block cast runner and processes, versatile.
Detailed description of the invention
Fig. 1 mixed-flow block cast runner product schematic diagram
Fig. 2 mixed-flow block cast runner product cross-sectional view
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, combined with specific embodiments below to this
Invention is described in further detail.It note that the embodiments described below is exemplary, for explaining only the invention, and
It is not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to the literature in the art institute
The technology or conditions of description are carried out according to product description.
A kind of processing method of processing mixed-flow block cast runner as depicted in figs. 1 and 2, comprising:
The acquisition of block cast runner digital-to-analogue: three-dimensional coordinate detection is carried out to block cast runner blank using three coordinate measurement machines, to runner hair
The surface of base crown 3, lower ring 2 and blade 1 and surrounding place circular index point and index point and global mark with annular coding
Ruler, comprehensive to take pictures to tested runner using special digital camera, obtaining includes coded target, and non-coding point is global
The photo of scale information.Then a group progress image procossing of taking a picture is imported in a computer, measures punctuate in photo group
Then two-dimensional coordinate calculates the three-dimensional coordinate point of all index points in space according to two-dimensional coordinate, to all the points carry out and
Theory three-dimensional models fitting generates block cast runner solid blank, chooses on 2 surface of runner bucket water inlet side 120 and outlet edge 110
3-4 coordinate points are as processing blade basis points, according to blank model and block cast runner drawing digital-to-analogue machining programming；
Crown, lower ring slightly add: select vertical lathe to the periphery of upper and lower end face, 3 flange of crown respectively to 3 flange of crown,
The periphery progress of each end face of lower ring 2, lower ring 2 slightly adds；
The processing of blade outlet type face: it selects gantry mill to carry out the roughing of the step, labels end face 310 above and be loaded for bottom surface
Block cast runner, it is levelling to runner progress according to mark point coordinate in blade outlet 110, aparallelepipedal contour is used with universal milling head
The exposed unshielding face of all blade outlets is slightly added to position from level to level by the mode of milling, and one layer of every processing when will be each
After the equal completion of processing of the blade layer, next layer is reprocessed, the vaned unshielding face of institute is after processing is completed.Rotary cutter is adopted
With the mode of fixing axle profile respectively by each blade because blade and blade overlapping generate the shielding surface blocked processing in place, in this way
When processing shielding surface, one blade of every processing need to only adjust primary vane array angle.
Blade intake side type face processing: using band rotary table digital-control boring-milling machine, by the centre of gyration of block cast runner with
The rotary table center of boring and milling machine is overlapped, respectively by the type face on each blade 1 water inlet side 120 in runner radial direction by extroversion
Inside machining is in place from level to level；
Half finishing of blade outlet type face: gantry mill is selected, with universal milling head by the way of Z-Level Milling, from level to level by institute
Have exposed half finishing of unshielding face of 1 outlet edge of blade 110 in place, it is every processing one layer when each layer of blade 1 is added
After work, next layer is reprocessed, after the completion of the equal semifinishing in unshielding face of all blades 1.Rotary cutter, using fixing axle
The mode of profile is respectively by each blade because blade and blade overlapping generate the shielding surface blocked half and process, to remove roughing
Remaining chipping allowance；
The finishing of blade outlet type face: selecting gantry mill, the side milled with universal milling head using Z-Level Milling, axis Mixed Zone
Formula finishing repairs cisoid line face.
Crown, lower ring finishing: the upper and lower end face of 3 flange of crown, the periphery of 3 flange of crown, lower ring 2 are respectively held with lathe
Face, lower ring 2 periphery carry out carry out finishing.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant, at the same time, for those skilled in the art, the think of according to the application
Think, there will be changes in the specific implementation manner and application range.
Claims (8)
1. a kind of processing method of mixed-flow block cast runner characterized by comprising
The acquisition of block cast runner digital-to-analogue: carrying out point cloud acquisition with crown, lower ring and blade of the three coordinate measurement machines to block cast runner, will
Point, which converges, is fitted to block cast runner blank model to be processed, according to blank model and block cast runner drawing digital-to-analogue establishment processing journey
Sequence；
Crown, lower ring slightly add: slightly add to the outer surface of crown, lower ring；
Blade outlet type face processing: with universal milling head by the way of Z-Level Milling, from level to level by all blade outlets
Exposed unshielding face is slightly added to position, rotary cutter, then respectively by each blade by it by the way of fixing axle profile
The shielding surface processing that his blade overlapping is blocked is in place；
Blade water inlet is processed in type face: type face when each blade being intake respectively with boring and milling machine is in runner radial direction by extroversion
Inside machining is in place from level to level；
Crown, lower ring finishing: finishing is carried out to the outer surface of crown, lower ring.
2. the processing method of mixed-flow block cast runner as described in claim 1, which is characterized in that blade water inlet side type face
Between procedure of processing and crown, lower ring finishing step further include:
Half finishing of blade outlet type face: using Z-Level Milling climb cutting processing method removal the remaining cutting of roughing more than
Amount；
The finishing of blade outlet type face: finishing repairs cisoid line face by the way of Z-Level Milling, the milling of axis Mixed Zone.
3. the processing method of mixed-flow block cast runner as described in claim 1, which is characterized in that the crown, lower ring it is outer
Contoured surface refers to the face that crown, lower ring are not connect with blade.
4. the processing method of mixed-flow block cast runner as described in claim 1, which is characterized in that the block cast runner digital-to-analogue is adopted
The step of collection, which is included in, to be selected to select 3-4 coordinate points as blade basis points respectively into water side and outlet edge.
5. the processing method of mixed-flow block cast runner as claimed in claim 4, which is characterized in that blade outlet type face
The step of processing, is including the use of the levelling runner of the blade basis points.
6. the processing method of mixed-flow block cast runner as described in claim 1, which is characterized in that blade outlet type face
The lowermost layer of the step aparallelepipedal contour Milling Machining of processing is not interfered the position being capable of processing by cutter.
7. the processing method of mixed-flow block cast runner as claimed in claim 1 or 2, which is characterized in that the crown, lower ring are thick
Add step, blade outlet type face procedure of processing, blade water inlet side type face procedure of processing and crown, lower ring finishing step add
The processing of processing program dynamic simulation is carried out before work to guarantee that processing program is errorless.
8. the processing method of mixed-flow block cast runner as claimed in claim 2, which is characterized in that blade outlet type face
The processing of processing program dynamic simulation is carried out before half finishing step and the processing of blade outlet type face finishing step to guarantee to process
Program is errorless.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811369927.7A CN109396764A (en) | 2018-11-17 | 2018-11-17 | A kind of processing method of mixed-flow block cast runner |
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| CN201811369927.7A CN109396764A (en) | 2018-11-17 | 2018-11-17 | A kind of processing method of mixed-flow block cast runner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110410259A (en) * | 2019-08-07 | 2019-11-05 | 东方电气集团东方电机有限公司 | A kind of leaf head cantilever type runner |
| CN111331318A (en) * | 2020-02-28 | 2020-06-26 | 共享智能装备有限公司 | Method for processing integrally cast seat ring |
| CN113909814A (en) * | 2021-10-12 | 2022-01-11 | 东方电气集团东方电机有限公司 | Method for machining impeller disc of high-head water pump turbine |
| CN114871481A (en) * | 2022-06-07 | 2022-08-09 | 中国航发航空科技股份有限公司 | Five-axis numerical control milling method for blisk |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410259A (en) * | 2019-08-07 | 2019-11-05 | 东方电气集团东方电机有限公司 | A kind of leaf head cantilever type runner |
| CN111331318A (en) * | 2020-02-28 | 2020-06-26 | 共享智能装备有限公司 | Method for processing integrally cast seat ring |
| CN113909814A (en) * | 2021-10-12 | 2022-01-11 | 东方电气集团东方电机有限公司 | Method for machining impeller disc of high-head water pump turbine |
| CN114871481A (en) * | 2022-06-07 | 2022-08-09 | 中国航发航空科技股份有限公司 | Five-axis numerical control milling method for blisk |
| CN114871481B (en) * | 2022-06-07 | 2023-11-10 | 中国航发航空科技股份有限公司 | Five-axis numerical control milling method for blisk |
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Application publication date: 20190301 |