CN101912990B - Method for milling and vibration-damping blisk - Google Patents
Method for milling and vibration-damping blisk Download PDFInfo
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- CN101912990B CN101912990B CN2010102375812A CN201010237581A CN101912990B CN 101912990 B CN101912990 B CN 101912990B CN 2010102375812 A CN2010102375812 A CN 2010102375812A CN 201010237581 A CN201010237581 A CN 201010237581A CN 101912990 B CN101912990 B CN 101912990B
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Abstract
The invention belongs to the technical field of machining and discloses a method for milling and vibration-damping a blisk. The method comprises the following specific process steps of: (1) preparing a filling material according to the proportion; (2) melting the filling material; (3) mounting a pouring clamp; (4) pouring a filling agent; (5) condensing the filling agent at normal temperature, secondarily condensing the filling agent and checking the condensing state of the filling agent; (6) mounting a filtering clamp; and (7) carrying out the abutted milling processing and chip removal processing. By pouring the filling agent between the blisk and vanes in the milling processing of vane profile five coordinates of the blisk, the method enhances the rigidity of parts in the milling processing of the vanes, eliminates the chatter marks generated at the vent tip part of the vanes during milling and reduces the roughness of the surfaces of the vanes. Meanwhile, the rigidities of the parts and a clamping system thereof are enhanced, so that the milling feed rate is increased and the milling speed can be improved.
Description
Technical field
The invention belongs to the Machining Technology field, particularly a kind of method for milling and vibration-damping blisk.
Background technology
The compressor blisk is the aero-engine critical component, is made by high temperature alloy or titanium alloy.In process, when its blade profile of finish-milling and runner, the maximum length of blade and thickness ratio are 35: 1, so blade is the long cantilever girder construction, because blade overhangs longer, adopt common processing technology, blade is subjected to cutting force effect meeting and produces flutter, serious " cutter relieving " phenomenon appears, simultaneously, owing to be subjected to the restriction of channel width and width of blade between the blade, tool diameter is little and knife bar is long again, blade is subjected to cutting force can produce vibration, the coupled flutter of this cutter and blade can have a strong impact on the suface processing quality of blade, makes blade surface fish scale shape defective occur, causes the blade tip section repeatedly to be processed and can't eliminate fish scale shape defective, cause the blade surface quality not reach designing requirement, cause the position degree of blade profile, form and position tolerance such as profile tolerance and distortion is overproof.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, a kind of method for milling and vibration-damping blisk is provided, this method is applied to integrated impeller blade profile five coordinate Milling Process, to this difficult-to-machine material of compressor blisk, as nickel base superalloy, titanium alloy etc.; Difficult processing structure, that, blade narrow as runner overhangs is long, the processing of weak hard parts such as the blade torsional angle big, opening character difference, the rigidity of part in the time of can strengthening the blade Milling Process, the distortion that produces when reducing the blade milling, the line that quivers that produces at the blade tip position when eliminating milling, the roughness of reduction blade surface.
Method for milling and vibration-damping blisk of the present invention may further comprise the steps:
1, prepares packing material in proportion;
The packing material composition comprises crystallization paraffin, liquid wax, abietic resin, Hinered phenols antioxidant;
The quality proportioning is: crystallization paraffin 60%-70%, liquid wax 20%-30%, abietic resin 5%-10%, Hinered phenols antioxidant 0.05%-0.2%;
The characteristics of this packing material are: low melting point, easily solidify; Titanium alloy, high-temperature alloy material are not produced corrosion and pollute; Stronger flowability is arranged under liquid state; Certain viscosity and toughness are arranged, but not sticking cutter does not influence milling effect; The cost of raw material is low.
2, fusing packing material;
Above-mentioned packing material is fully mixed in canister, place to heat on the electric furnace and melt fully, stir then, become the liquid filler until solid wax.
3, the cast anchor clamps are installed;
The cast clamp structure is upper end and the inboard cirque structure of opening wide, as shown in Figure 2, form a upper end and the inboard hemi-closure space of opening wide by metallic support annulus, end steel plate and side steel plate, the end steel plate and the side steel plate back side all have reinforcement to support, to strengthen the intensity of bottom surface and lateral surface.During installation, the cast anchor clamps are positioned at the blisk below and entangle the leaf dish from the bottom up fully, the metallic support annulus contacts with leaf dish listrium realizes axial location and sealing, guarantee that by centering the cast anchor clamps are concentric with part, circular runout is not more than 2mm, the outward flange fit clearance of side steel plate and blade tip is 10mm, metallic support annulus, end steel plate and side steel plate cooperate with the leaf dish form that the upper end opens wide, the casting space of medial surface and lateral surface sealing, the cast anchor clamps compress mode by the screw pressing plate and fixedly connected with platen.
4, cast filler;
Pour into a mould filler by whole equal altitudes mode in the blade space of blisk, cast is watered the space of full blade fully up to filler, and exceeds blade inlet edge (top edge) highest point 5-10mm.Cast is wanted to avoid because temperature descends fast, and filler is in the state that partly dissolves, and influences casting quality.
5, filler air-setting, filler help and coagulate and inspection filler curdled appearance;
1) the filler air-setting time is 10 hours to 24 hours;
2) to help be to help and solidify by dry the piecewise method of cooling of circumference uniform distribution common electrical fan blowing or compressed air to filler with fixed attention, quickens to shorten setting time;
3) method of checking the filler curdled appearance be observe filler earlier color from depth to shallow, illustrate that filler has begun to solidify, probe into thickness between the blade neutral with probe again, extract probe then out, check filler residue solid state on the probe,, illustrate that filler does not solidify fully if the filler residue of fluid state is arranged on the probe, if the filler residue on the probe is solid-state powdery, illustrate that filler solidifies fully.
6, the filtration anchor clamps are installed;
Pull down the cast anchor clamps after filler solidifies, install and filter anchor clamps.
The filtration anchor clamps are cirque structure, as shown in Figure 3, side steel wire height has only 15mm, far below the minimum point that adds impeller blade trailing edge in man-hour (base, blade bottom), the end steel wire and the side steel wire back side all have reinforcing prop to support, to strengthen the intensity of bottom surface and lateral surface.During installation, filter the below that anchor clamps place the leaf dish, compress mode by the screw pressing plate and fixedly connected with platen.
7, processing and chip removal processing are milled in butt joint;
Adopt open type leaf dish-enclosed leaf dish combination to mill processing, processing is milled in i.e. butt joint, divide two procedures processing with the whole blade profile, as shown in Figure 4, mill helical milling district and butt joint earlier and mill the district, this is the processing of first procedure, spin upside down the leaf dish then, prepare processing upset butt joint and mill the district, because process through first procedure, the only surplus small part of packing material between the blade, for strengthening effectiveness in vibration suppression, weaken the coupled flutter of blade and cutter, the district is milled in the butt joint between blade and district's 1/3～1/2 zone filling toughness material adjacent with the helical milling district milled in butt joint, as foam, as the subplan of vibration damping.Note the tightness that cooperates of toughness material and blade, can not be with the distortion of blade top, it is thin to cause blade to mill.Fill out
Behind the plug toughness material, begin to mill the upset butt joint and mill the district, this is second operation work processing.Through the processing of two procedures, finish Milling Process to a blade.
In Milling Processes, filler can become chip along with Tool in Cutting, flow in the cooling fluid, cause the obstruction of machining center coolant circulation system, malfunctioning and warning, therefore adopt the filtration anchor clamps that cooling fluid and chip filtration are separated, look anchor clamps intraclast full level in the processing, timing labor cleaning chip, avoid the chip overfill, overflow the filtration anchor clamps, sneak in the cooling fluid.
The advantage of method for milling and vibration-damping blisk of the present invention is that this method eliminated weak hard parts such as difficult-to-machine material part, labyrinth part and added the piece surface milling distortion that produces man-hour and the line that quivers, strengthened the processing rigidity of part, make the milling feed rate strengthen, improved milling speed effectively, save machining period, and then saved processing charges.
Description of drawings
Fig. 1 is the integrated impeller blade structural representation
Fig. 2 is cast clamp structure schematic diagram
Fig. 3 is for filtering the clamp structure schematic diagram
Fig. 4 is integrated impeller blade processing schematic diagram
12 reinforcing prop 13 helical milling districts, 14 butt joints of 1 wheel disc, 2 blades, 3 blade tips, 4 listriums, 5 metallic support annulus, 6 end steel plate, 7 side steel plates, 8 reinforcements, 9 metallic support circular rings, 10 end steel wire, 11 side steel wires are milled district's 15 upset butt joints and are milled the district among the figure
The specific embodiment
Embodiment: process a compressor blisk, blisk is made up of wheel disc 1 and blade 2, and as shown in Figure 1, material is a titanium alloy.
Its procedure of processing is as follows:
1. join packing material by fixed proportion;
The quality proportioning is: crystallization paraffin 65%, liquid wax 25%, abietic resin 9.9%, Hinered phenols antioxidant-2, three grades of butyl of 6-, 4 methylphenols 0.1%;
2. fusing packing material;
Above-mentioned packing material is fully mixed in canister, place to heat on the electric furnace and melt fully, stir then, become the liquid filler until solid wax.
3. the cast anchor clamps are installed;
As shown in Figure 2, semiclosed annular cast anchor clamps are entangled the compressor blisk from the bottom up, metallic support annulus 5 is contacted with listrium 4 guarantee location and sealing, side steel plate 7 is 10mm with the cylindrical fit clearance of blade tip 3, metallic support annulus 5, end steel plate 6, side steel plate 7 cooperate the formation upper end to open wide with the leaf dish semitight casting space.The cast anchor clamps compress mode by the screw pressing plate and fixedly connected with platen.
4. cast filler;
Pour into a mould filler by whole equal altitudes mode in blade 2 spaces of compressor blisk, cast is watered the space of full blade 2 fully up to filler, and exceeds blade 2 leading edge peak 5-10mm.Cast is wanted to avoid because temperature descends fast, and filler is in the state that partly dissolves, and influences casting quality.
5. filler air-setting, filler help and coagulate and inspection filler curdled appearance;
1) the filler air-setting time is 18 hours;
2) help and solidify filler by dry the piecewise method of cooling of circumference uniform distribution common electrical fan blowing or compressed air, quicken to shorten setting time;
3) color of checking filler illustrate that filler has begun to solidify from depth to shallow, probes into thickness between blade 2 neutrals with probe again, extracts probe then out, filler residue solid state on the inspection probe.If the filler residue on the probe is solid-state powdery, illustrate that filler solidifies fully.If the filler residue of fluid state is arranged on the probe, illustrate that filler does not solidify fully, at this moment continue to help filler with fixed attention.After 4 hours, whether solidify fully with the pin check filler again,, repeat above-mentioned helping and coagulate filler and pin check step, till filler solidifies fully if also do not solidify fully.
6. install and filter anchor clamps;
Pull down the cast anchor clamps, as shown in Figure 3, put below the leaf dish, compress mode by the screw pressing plate and fixedly connected with platen with filtering anchor clamps.
7. processing and chip removal processing are milled in butt joint;
Adopt open type leaf dish-enclosed leaf dish combination to mill processing, i.e. processing is milled in butt joint, divides two procedures processing with whole blade 2 profiles, as shown in Figure 4, mills helical milling district 13 and butt joint earlier and mills district 14, and this is the processing of first procedure.Spin upside down the leaf dish, prepare processing upset butt joint and mill district 15, because process through first procedure, the only surplus small part of packing material between the blade 2, for strengthening effectiveness in vibration suppression, weaken the coupled flutter of blade 2 and cutter, the butt joint between blade 2 is milled district 14 and butt joint and is milled 1/2 adjacent zone filling foam of district 14 and helical milling district 13, as the subplan of vibration damping.Note the tightness that cooperates of foam and blade 2, can not be with blade 2 top distortion, it is thin to cause blade 2 to mill.Behind the filling foam, begin to mill the upset butt joint and mill district 15, this is second operation work processing.Through the processing of two procedures, finish Milling Process to a blade 2.
In Milling Processes, filler can become chip along with Tool in Cutting, in the inflow cooling fluid, cooling fluid and chip are filtered separately with filtering anchor clamps, and according to anchor clamps intraclast full level, timing labor cleaning chip.
After processing the compressor blisk according to the method described above, precision of blades is reached: blade profile reverses because of distortion with respect to benchmark and is not more than ± 18 ', the blade type profile tolerance of a surface is 0.10～0.22, and blade is 0.4 with respect to the position degree of long-pending folded axle, and the blade roughness can be near Ral.6.
Claims (4)
1. a method for milling and vibration-damping blisk is characterized in that this method is in integrated impeller blade profile five coordinate Milling Process, pours into a mould filler between impeller blade, and its concrete steps are as follows:
1) prepares packing material in proportion;
The packing material composition comprises crystallization paraffin, liquid wax, abietic resin, Hinered phenols antioxidant, and its quality proportioning is: crystallization paraffin 60%-70%, liquid wax 20%-30%, abietic resin 5%-10%, Hinered phenols antioxidant 0.05%-0.2%;
2) fusing packing material;
Packing material is fully mixed in canister, place to heat on the electric furnace and melt fully, stir then, become the liquid filler until solid wax;
3) the cast anchor clamps are installed;
The cast anchor clamps are positioned at the blisk below and entangle the leaf dish from the bottom up fully, guarantee that by centering the cast anchor clamps are concentric with part;
4) cast filler;
Pour into a mould filler by whole equal altitudes mode, cast is watered the space of full blade (2) fully up to filler, and exceeds blade (2) leading edge highest point 5-10mm, and cast is wanted to avoid because temperature descends fast, and filler is in the state that partly dissolves;
5) filler air-setting, filler help and coagulate and inspection filler curdled appearance;
The filler air-setting time is 10 hours to 24 hours; It is to help and solidify by dry the piecewise method of cooling of circumference uniform distribution common electrical fan blowing or compressed air with fixed attention that filler helps; The method of checking the filler curdled appearance is the color of observing filler earlier, and then probes into thickness between blade (2) neutral with probe, extracts probe out, checks filler residue solid state on the probe;
6) the filtration anchor clamps are installed;
Pull down the cast anchor clamps after filler solidifies, place the below of leaf dish, compress mode by the screw pressing plate and fixedly connected with platen with filtering anchor clamps;
7) processing and chip removal processing are milled in butt joint.
2. method for milling and vibration-damping blisk as claimed in claim 1 is characterized in that, described cast anchor clamps are upper end and the inboard cirque structure of opening wide, and are made up of metallic support annulus (5), end steel plate (6), side steel plate (7) and reinforcement (8).
3. method for milling and vibration-damping blisk as claimed in claim 1 is characterized in that, described filtration anchor clamps are cirque structure, is made up of metallic support circular rings (9), end steel wire (10), side steel wire (11) and reinforcing prop (12).
4. method for milling and vibration-damping blisk as claimed in claim 1 is characterized in that, described butt joint is milled and added the work point two procedures,
1) district (14) is milled in the helical milling district (13) and the butt joint of milling blade;
2) spin upside down the leaf dish, between blade (2), mill district (14) and district (14) 1/3～1/2 zone filling toughness material adjacent with helical milling district (13) milled in butt joint in butt joint, milling then overturns docks and mills district (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102375812A CN101912990B (en) | 2010-07-27 | 2010-07-27 | Method for milling and vibration-damping blisk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102375812A CN101912990B (en) | 2010-07-27 | 2010-07-27 | Method for milling and vibration-damping blisk |
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| CN101912990A CN101912990A (en) | 2010-12-15 |
| CN101912990B true CN101912990B (en) | 2011-11-23 |
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| CN2010102375812A Expired - Fee Related CN101912990B (en) | 2010-07-27 | 2010-07-27 | Method for milling and vibration-damping blisk |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423865B (en) * | 2011-10-18 | 2013-11-06 | 中国科学院光电技术研究所 | Method for measuring surface shape of turned center opening mirror by contact type contourgraph |
| CN104400087B (en) * | 2014-10-31 | 2017-03-08 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of integral wheel Milling Machining vibration damping fill method |
| CN104690572B (en) * | 2015-03-17 | 2017-02-01 | 四川明日宇航工业有限责任公司 | Weakly rigid aviation structural member small stress filling and shock absorption clamping machining method |
| CN105033338B (en) * | 2015-08-10 | 2017-11-07 | 湖北三江航天红阳机电有限公司 | A kind of titanium alloy is combined the processing method that conical part is opened to heart notch with fiberglass |
| CN105479636A (en) * | 2015-11-20 | 2016-04-13 | 沈阳黎明航空发动机(集团)有限责任公司 | Foaming vibration damping filling method for integral impeller milling machining |
| CN105436823B (en) * | 2015-11-24 | 2018-10-09 | 沈阳黎明航空发动机(集团)有限责任公司 | A method of control thin-walled parts machining deformation |
| CN109940415B (en) | 2019-03-27 | 2020-02-18 | 大连理工大学 | Magnetorheological support method for machining blade disc |
| CN110026613A (en) * | 2019-04-18 | 2019-07-19 | 山西平阳重工机械有限责任公司 | The method of surface finish of propeller blade and U-shaped feature side-wall |
| CN110465687B (en) * | 2019-08-21 | 2020-06-05 | 无锡市润和机械有限公司 | Machining method for integral blade of aero-engine |
| CN112059259B (en) * | 2020-09-18 | 2022-09-02 | 中国航发贵州黎阳航空动力有限公司 | Machining method and machining clamp for cantilever type blade ring |
| CN112404539A (en) * | 2020-09-28 | 2021-02-26 | 中国航发沈阳黎明航空发动机有限责任公司 | Blisk rough milling method |
| CN113231677B (en) * | 2021-05-27 | 2022-04-01 | 贵州永红航空机械有限责任公司 | Anti-vibration milling method for ultrathin blade of integral impeller |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7377037B2 (en) * | 2004-05-25 | 2008-05-27 | General Electric Company | Fillet machining method without adaptive probing |
| US8100655B2 (en) * | 2008-03-28 | 2012-01-24 | Pratt & Whitney Canada Corp. | Method of machining airfoil root fillets |
| CN101445657B (en) * | 2008-12-30 | 2011-12-07 | 沈阳黎明航空发动机(集团)有限责任公司 | Supporting filling material for producing integral vane disk |
| 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 |
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