CN1986127A - Slotting and milling process for vane of integral vane wheel - Google Patents

Slotting and milling process for vane of integral vane wheel Download PDF

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Publication number
CN1986127A
CN1986127A CN 200610125473 CN200610125473A CN1986127A CN 1986127 A CN1986127 A CN 1986127A CN 200610125473 CN200610125473 CN 200610125473 CN 200610125473 A CN200610125473 A CN 200610125473A CN 1986127 A CN1986127 A CN 1986127A
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CN
China
Prior art keywords
cutter
blade
milling
vane
processing
Prior art date
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Pending
Application number
CN 200610125473
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Chinese (zh)
Inventor
董洪林
王益知
汤敏
吴红琼
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Wuhan Marine Machinery Plant Co Ltd
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Wuhan Marine Machinery Plant Co Ltd
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Priority to CN 200610125473 priority Critical patent/CN1986127A/en
Publication of CN1986127A publication Critical patent/CN1986127A/en
Pending legal-status Critical Current

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Abstract

The slotting and milling cutter process for vane of integral vane wheel is completed in a numerically controlled machine tool with slotting and milling cutter advancing in the radial direction of the vane wheel and axial direction of the cutter. It has small radial force component caused by cutting, less vibration of the workpiece and the cutter, smooth cutting, small and controllable vane deformation, high machining quality and high machining efficiency. The present invention can meet the requirement of machining great diameter and high precision vane wheel product.

Description

The slotting milling process of integral wheel blade
Technical field
The present invention relates to a kind of cutting working method of integral wheel blade, relate to the slotting milling process of the integral wheel blade that can process integral wheel free form surface blade particularly.
Background technology
Impeller is indispensable critical component in machineries such as compressor, air blast, pump, and during the impeller rotation, the acting of blade convection cell makes direction, speed or the pressure of fluid obtain changing, and realizes its mechanical function.Flow direction according to fluid, impeller can be divided into axial-flow type and centrifugal two kinds, the structure of two kinds of impellers all is made up of wheel hub and blade, wheel hub is the conical shell of similar segment, is uniform-distribution with blade on the wheel hub, and the shape of blade has two kinds of straight burr shape or free form surface shapes, the geometry of free form surface blade does not have certain rule, difficulty of processing is big, but flow dynamics is good, the operational efficiency height.Referring to Fig. 1, as the free form surface blade 2 of axial-flow type integral wheel mainly by end face 25, pressure face 22, suction surface 21, water inlet limit 23, go out waterside 24 and knuckle 26 is formed, end face 25 is the conical surface, pressure face 22 and suction surface 21 are free form surface, water inlet limit 23 is the transition of oval angle, go out waterside 24 and be ruled surface, blade 2 is to the ascending linear change that is of knuckle 26 radiuses between the wheel hub 1.The spatial warping of this blade, degree of overlapping are big and change irregular.In view of the design feature and the material behavior of monoblock type impeller blade, suitable numerical-control processing method and processing technology are particularly important to guaranteeing product quality and improving working (machining) efficiency.Because the blade space degree of overlapping is big, need to adopt multiaxis processing.Referring to Fig. 2, traditional processing method generally is to adopt ball cutter 3 (or circular knife milling cutters) that blade 2 is carried out machining, its machining direction 31 is that promptly cutter is done the feed campaign of circulating type on the axis direction of impeller along the machining path of the axial generation cutter operation of impeller.Mainly there is following drawback in this method:
1, because the machining direction of cutter is basically parallel to the end face of blade, and blade is similar cantilever design on stress, the root that adds the blade in man-hour bears certain bending moment, and is yielding, poor rigidity; And that the ball cutter adds the radial component of cutting force in man-hour is big, adds that ball cutter self diameter is little, and arbor stiffness is poor, in process vibration bigger, crudy is difficult to control; And because radial component is big, the cutter relieving phenomenon of blade and cutter makes blade deflection everywhere be difficult to control, makes crudy be difficult to guarantee.
2. the scope of knife bar length and tool motion is bigger to the constraint of adjusting workpiece and cutter interference.The diameter of ball cutter is less, but the draw ratio of the scope of its motion and knife bar is bigger, and in the process of adjusting workpiece and cutter mutually noninterfere, restraining factors are more, particularly when blade height is higher, avoid the difficulty of workpiece and cutter interference bigger.
3. the cutter path of ball cutter processing generation is longer, adds the rigidity deficiency of fixing a cutting tool, and feed rate and cutting output all can't increase, and have prolonged the cutting time, have reduced working (machining) efficiency.
Summary of the invention:
The objective of the invention is to overcome the defective and the deficiency of prior art, provide a kind of tool feeding amount big, deformable blade is little, and feed path is short, the slotting milling process of the integral wheel blade that stock-removing efficiency is high
Technical solution of the present invention is: the slotting milling process of integral wheel blade, adopt Digit Control Machine Tool processing, and cutter adopts plugs in milling cutter, inserts the machining direction of milling cutter on blade and be impeller radially.
The present invention can also be behind the intact blade of plug in milling cutter digital control processing, and the employing buffing wheel is removed the residual ridge height between adjacent two cuttves.
Plug in milling cutter of the present invention has another name called Z to feed milling cutter, when the blade of processing free form surface integral wheel, adopt the direction of feed of plugging in milling cutter and selecting to be basically perpendicular to blade end face camber line to carry out machining, make cutter and workpiece not produce interference by adjusting the cutter inclination angle, and keeping certain safe distance, other parameter gets final product by common method setting according to allowance and machining accuracy.
Compare with traditional processing method, major advantage of the present invention is:
1. adopt to plug in milling cutter processing, machining direction be cutter shaft to, the radial component of cutter is very little during cutting, thereby has effectively suppressed the vibration of workpiece and cutter, makes stable cutting, the deformable blade amount is little and be easy to control, crudy guarantees easily; And after the vibration minimizing, can strengthen cutting data, thereby improve working (machining) efficiency.
2. owing to be axial feed, the range of movement of cutter on spoon of blade is little, and draw ratio is little, knife bar length is little to vibration and the deformation effect that adds man-hour, the leeway of adjusting cutter and workpiece interference is bigger, even it is thicker to insert milling cutter diameter, cutter and workpiece also are difficult for producing interference.
3. insert the cutter path weak point that milling processing generates, therefore improved working (machining) efficiency.The inventive method not only can be applied to axial-flow type integral wheel free form surface processing of leaves, also can be applied to centrifugal integral wheel free form surface processing of leaves.
Description of drawings:
Fig. 1 is the structural representation of axial-flow type integral wheel
Fig. 2 is the feed path figure of traditional ball cutter 3 processing
Fig. 3 is the feed path figure that the present invention plugs in milling cutter 4 processing
The specific embodiment:
The present invention is described in further detail below in conjunction with description of drawings and the specific embodiment:
Referring to Fig. 1, Fig. 3, the slotting milling process of integral wheel blade of the present invention adopts Digit Control Machine Tool processing, and cutter adopts plugs in milling cutter 4, inserts the machining direction 41 of milling cutter 4 on blade 3 and be impeller radially.
Embodiment 1:
Adopt the free form surface blade 2 of the inventive method processing axial-flow type integral wheel, impeller material is a ultra hypoeutectoid, diphasic stainless steel, and the impeller maximum gauge is the 800-1000 millimeter, and blade 2 maximum heights are the 240-260 millimeter.On five number of coordinates control machine tools, process.The establishment of its slotting milling process and the generation of program comprise the following step:
1 sets up the physical model of impeller in UG NX2.0/CAD module.
1.1 the design point that provides according to design drawing connects into closed curve with the point in same cross section with NURB batten (non-uniform rational B-spline), and carries out fairing processing.
The point that design drawing provides is the discrete point on blade 2 cross sections, in order to generate the free form surface of blade 2, these points must be fitted into line, in order to make the line smoothing of generation, draw the SPL order by using, select the NURB batten for use, these some head and the tail are connected into a closed curve; And utilize the tracing analysis order of software that curve curvature is everywhere adjusted, make fairing everywhere not have flex point.
1.2 by the method for scanning, with all section lines generation curved surfaces of same blade 2.
By above operation, all each section lines of cross section dot generation of blade 2, the order of scanning of calling software again selects each section line for scanning curve in order, notices that the direction of all section lines must be consistent, generates the curved surface of individual blade 2.
1.3, generate entity by padding with the sealing of blade 2 curved surfaces.
After the free form surface of blade 2 generated, because end face 25 and hub face place do not have section line, free form surface inwardly must extend to the hub face place, extends to end face 25 places to exterior palpi.This process is to finish by the curved surface expansion order of software, and all freely extend by curvature direction at two ends.By the conical surface and the end face of hub face, utilize to sew up to order blade 2 each face are stitched into an occluding surface then; The filling order that re-uses software is filled to an entity with occluding surface.
1.4 generate the knuckle 26 of 1 of blade 2 and wheel hub with the operation of soft chamfering, and finish the physical model of whole impeller by operations such as arrays.
After individual blade 2 entities generated, by the annular array order, the array angle was 60 degree, generates 6 five equilibrium blades 2 at wheel hub 1 circumference; The knuckle 26 that blade 2 and wheel hub are 1, by soft chamfering operation, selecting initial chamfering is R17, and the termination chamfering is R26, and the centre is a linear change, generates knuckle 26, thereby finishes the foundation of whole impeller threedimensional model.
2. in UG NX2.0/CAM module, create the processing method of impeller.
2.1 establishment process tool.
In the software environment that multiaxis is processed, create the parameter that parameter is plugged in milling cutter 4,63 millimeters of the diameters that concrete parameter is plug in milling cutter 4 cutters, long 10 millimeters of sword, point of a knife fillet R0.2 millimeter, 50 millimeters of shank diameters, 275 millimeters of length.
2.2 create the processing method of plugging in milling cutter 4, emphasis is to elect the mode of machining direction 41 as impeller radially, other parameter is set according to allowance and machining accuracy.
When creating processing method, call multiaxis and mill module.At first selecting processing how much (entities) be individual blade 2 entities, and interfering is for how much adjacent two blades 2 and wheel hub 1 body, and process tool is chosen the plug in milling cutter of face establishment; After above-mentioned selection is finished, enter the setting and the choice menus of drive surface, also be the main machined parameters placement in the programming, mainly contain following parameter: drive surface is selected, size, chipping allowance, the cutting direction of drive surface, cut and cut out precision, residual ridge height, cutter projecting direction, the amount of feeding and advance and retreat cutter etc.Be described further with regard to these parameters below:
It is drive surface that drive surface is selected both to have selected finished surface, also can select the face set up separately in addition, and the ginseng curved surface such as being provided with here separately is drive surface, makes the movement locus of cutter more steady.
The drive surface size is elected 0%-100% as.
Chipping allowance can suitably be selected according to arts demand, and adopting roughing here is 3.5mm, and semifinishing is 1.5mm, and finishing work point two cuttves carry out, by 0.5mm to finishing.
Cutting direction in a plurality of directions of feed that software provides, selects to point to the direction in impeller axle center for inserting the important option of milling method, and promptly impeller radially is a cutting direction.
Incision with cut out precision can be according to thick, accurately machined precision different and part precision require to be provided with, general roughing is provided with low, fine finishining is provided with height, it is 0.02mm that fine finishining here is provided with the incision precision, cutting out precision is 0.03mm.
Residual ridge height is the crest of processing generation between adjacent two cuttves and the height of trough, also is provided with according to thick, accurately machined difference, and fine finishining here is set to 0.02mm.
The cutter projecting direction is elected the axial of impeller as.
The amount of feeding selects 500 millimeters/minute here, and advance and retreat cutter and other parameter get final product by common processing technology setting.
After 2.3 all parameters were set, software calculated cutter path automatically, at this moment must the scrutiny cutter path, and whether sudden change and undesired is arranged, otherwise must group parameter adjust, carry out dynamic simulation and interference checking then.
2.4 select the lathe preprocessor for use, generate the numerical control program (G code) that is used to process, and in VERICUT software, G code is carried out machining simulation, thereby obtain final procedure.
After inserting the intact blade 2 of milling cutter 4 digital control processings, the employing buffing wheel is removed the residual ridge height between adjacent two cuttves.Adjacent two cutting arcs left radially strip on blade 2 was processed tool marks after residual ridge height was meant and plugs in milling cutter 4 feedings.Also can adopt simultaneously buffing wheel to polish blade 2 roots and the knuckle 26 of taking turns between the shell 1.
Embodiment 2:
Employing ball cutter processing method and the inventive method are processed above-mentioned same integral wheel blade 2 and are made comparisons: adopt the processing of ball cutter earlier, every about 17 days of integral wheel processing of leaves cycle (20 hours every days), about 340 hours altogether; The back is adopted and is plugged in milling cutter by the inventive method processing, about 7 days of the manufacturing cycle of every integral wheel blade, about 140 hours.The working (machining) efficiency of the inventive method improves more than 2 times than ball cutter processing, and the integral wheel product precision of producing improves greatly, quality obtains stable control, has satisfied the needs of major diameter, the processing of high accuracy impeller product fully.

Claims (2)

1. the slotting milling process of integral wheel blade adopts Digit Control Machine Tool processing, it is characterized in that: cutter adopts plugs in milling cutter (4), inserts the machining direction (41) of milling cutter (4) on blade (3) and be impeller radially.
2. the slotting milling process of integral wheel blade according to claim 1 is characterized in that: after inserting the intact blade (2) of milling cutter (4) digital control processing, the employing buffing wheel is removed the residual ridge height between adjacent two cuttves.
CN 200610125473 2006-12-15 2006-12-15 Slotting and milling process for vane of integral vane wheel Pending CN1986127A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101708559B (en) * 2009-12-10 2011-03-02 西北工业大学 Five-coordinate plunge milling machining method of closed type bladed disc
CN102085576A (en) * 2010-12-29 2011-06-08 沈阳黎明航空发动机(集团)有限责任公司 Five-axis linkage variable-axis plunge milling numerically controlled processing method for blade part of integral impeller
CN102126042A (en) * 2011-03-07 2011-07-20 江苏金通灵风机股份有限公司 Rough machining method of integrated three-dimensional flow blade wheel
CN101733618B (en) * 2008-11-12 2011-12-14 沈阳黎明航空发动机(集团)有限责任公司 Numerically controlled drilling and milling processing method for runner of blisk of engine
CN101767218B (en) * 2008-12-30 2012-05-09 沈阳黎明航空发动机(集团)有限责任公司 Five-axis plunge milling method of aeroengine crankcase
CN102566491A (en) * 2011-12-15 2012-07-11 北京交通大学 Method and device for planning side-milling cutter axial vector of non-developable ruled surface
CN102091919B (en) * 2009-12-09 2013-03-06 沈阳鼓风机集团股份有限公司 Machining method of three-dimensional closed impeller
CN103645674A (en) * 2013-11-29 2014-03-19 华中科技大学 A method for generating a mixed path of rough-semifine-fine milling of an integrated impeller blade
CN104373377A (en) * 2014-10-30 2015-02-25 中国北车集团大连机车研究所有限公司 High-pressure-ratio gas compressor impeller of supercharger for internal combustion engine
CN104816139A (en) * 2015-04-20 2015-08-05 第一拖拉机股份有限公司 Chain wheel tooth-shaped profile plunge milling method
CN105290744A (en) * 2015-11-27 2016-02-03 东方电气集团东方汽轮机有限公司 Rough machining method for partspan shroud of turbine blade
CN104181865B (en) * 2014-08-27 2017-05-24 华中科技大学无锡研究院 Annular feed path planning method of integral impeller rough machining
CN107971714A (en) * 2017-11-24 2018-05-01 中国航发沈阳黎明航空发动机有限责任公司 A kind of high temperature alloy entirety leaf joint blade part milling fluting processing method
CN108080898A (en) * 2017-12-18 2018-05-29 中国航发贵州黎阳航空动力有限公司 A kind of compressor rotor blade blade percent ripple processing technology and detection method
CN108237374A (en) * 2016-12-27 2018-07-03 武汉重型机床集团有限公司 The three-shaft linkage processing method of multiple-blade runner curved surface
CN109317735A (en) * 2018-11-22 2019-02-12 重庆江增船舶重工有限公司 A kind of diffuser processing method
CN111857056A (en) * 2020-07-31 2020-10-30 东莞市中泰模具股份有限公司 Method for generating feeding inclination of lifting plate in progressive die, storage medium and CNC (computer numerical control) machine tool

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101733618B (en) * 2008-11-12 2011-12-14 沈阳黎明航空发动机(集团)有限责任公司 Numerically controlled drilling and milling processing method for runner of blisk of engine
CN101767218B (en) * 2008-12-30 2012-05-09 沈阳黎明航空发动机(集团)有限责任公司 Five-axis plunge milling method of aeroengine crankcase
CN102091919B (en) * 2009-12-09 2013-03-06 沈阳鼓风机集团股份有限公司 Machining method of three-dimensional closed impeller
CN101708559B (en) * 2009-12-10 2011-03-02 西北工业大学 Five-coordinate plunge milling machining method of closed type bladed disc
CN102085576A (en) * 2010-12-29 2011-06-08 沈阳黎明航空发动机(集团)有限责任公司 Five-axis linkage variable-axis plunge milling numerically controlled processing method for blade part of integral impeller
CN102126042B (en) * 2011-03-07 2012-12-19 江苏金通灵流体机械科技股份有限公司 Rough machining method of integrated three-dimensional flow blade wheel
CN102126042A (en) * 2011-03-07 2011-07-20 江苏金通灵风机股份有限公司 Rough machining method of integrated three-dimensional flow blade wheel
CN102566491A (en) * 2011-12-15 2012-07-11 北京交通大学 Method and device for planning side-milling cutter axial vector of non-developable ruled surface
CN103645674A (en) * 2013-11-29 2014-03-19 华中科技大学 A method for generating a mixed path of rough-semifine-fine milling of an integrated impeller blade
CN103645674B (en) * 2013-11-29 2016-01-13 华中科技大学 A kind of thick-half essence-finish-milling mixed path generation method of Integral impeller blade
CN104181865B (en) * 2014-08-27 2017-05-24 华中科技大学无锡研究院 Annular feed path planning method of integral impeller rough machining
CN104373377A (en) * 2014-10-30 2015-02-25 中国北车集团大连机车研究所有限公司 High-pressure-ratio gas compressor impeller of supercharger for internal combustion engine
CN104816139A (en) * 2015-04-20 2015-08-05 第一拖拉机股份有限公司 Chain wheel tooth-shaped profile plunge milling method
CN105290744A (en) * 2015-11-27 2016-02-03 东方电气集团东方汽轮机有限公司 Rough machining method for partspan shroud of turbine blade
CN108237374A (en) * 2016-12-27 2018-07-03 武汉重型机床集团有限公司 The three-shaft linkage processing method of multiple-blade runner curved surface
CN107971714A (en) * 2017-11-24 2018-05-01 中国航发沈阳黎明航空发动机有限责任公司 A kind of high temperature alloy entirety leaf joint blade part milling fluting processing method
CN107971714B (en) * 2017-11-24 2019-03-15 中国航发沈阳黎明航空发动机有限责任公司 A kind of high temperature alloy entirety leaf joint blade part milling fluting processing method
CN108080898A (en) * 2017-12-18 2018-05-29 中国航发贵州黎阳航空动力有限公司 A kind of compressor rotor blade blade percent ripple processing technology and detection method
CN109317735A (en) * 2018-11-22 2019-02-12 重庆江增船舶重工有限公司 A kind of diffuser processing method
CN111857056A (en) * 2020-07-31 2020-10-30 东莞市中泰模具股份有限公司 Method for generating feeding inclination of lifting plate in progressive die, storage medium and CNC (computer numerical control) machine tool
CN111857056B (en) * 2020-07-31 2021-06-25 东莞市中泰模具股份有限公司 Method for generating feeding inclination of lifting plate in progressive die, storage medium and CNC (computer numerical control) machine tool

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