CN104384447B - A kind of method manufacturing marine copper alloy highly skewed propellers leaf - Google Patents
A kind of method manufacturing marine copper alloy highly skewed propellers leaf Download PDFInfo
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- CN104384447B CN104384447B CN201410742298.3A CN201410742298A CN104384447B CN 104384447 B CN104384447 B CN 104384447B CN 201410742298 A CN201410742298 A CN 201410742298A CN 104384447 B CN104384447 B CN 104384447B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
Abstract
The invention discloses a kind of method manufacturing marine copper alloy highly skewed propellers leaf, by accurately predicting the deflection of blade, anti-deformation is increased in casting Technology Design, compensation blade deforms, reach to control the purpose of paddle size, only increase the process allowance of necessity, thus reach to reduce the purpose of process allowance.
Description
Technical field
The invention belongs to casting Technology Design technical field, be specifically related to a kind of manufacture marine copper alloy big
The method of skew back blade.
Background technology
Marine copper alloy highly skewed propellers leaf size is big (＞ 1m), and skew angle is big, and guide margin, lagging edge are long and thin,
The thickness of mean camber line position is big.In casting solidification process, the guide margin of blade, lagging edge rate of cooling are fast,
Center rate of cooling is slow, thus is easily caused blade deformation.In order to ensure the processing of blade, generally in casting
Place bigger process allowance to ensure paddle size to blade when making technological design, often result in blade
The problems such as the postorder processing cycle is long, waste of raw materials.
In order to reduce the process allowance of blade, according to the deformation tendency in blade casting process and deflection,
Carry out reversible deformation design, blade is carried out deformation-compensated.The deflection of blade has three kinds of method for expressing,
The first is characteristic parameter characterization method, characterizes foundry goods by the cross section blade profile of blade carries out parametrization
Deflection.Common method has string of a musical instrument etc. in parametrization mean camber line and vane thickness, parametrization.Document is " big
Type turbo blade hot investment casting dimension control research reversible deformation technology " (casting, 1108-1111,
2009,58 (11), Han Wei, Yu Wangsheng, Kong Shengguo etc.) use within parameter list on the basis of the string of a musical instrument
Show that method characterizes deflection.The method implementation process is complicated, requires the design level of technologist relatively
High, it is difficult to promote the use of.The second is blade mesh node information method.Use casting technique emulation soft
Part carries out stress deformation simulation to foundry goods, directly reads the forward and backward leaf model of deformation from analog result
Mesh node information, obtain deflection.Document " divide by essence casting turbo blade error based on displacement field
Analysis system is studied " (Northwestern Polytechnical University's master thesis, 15-20,2007, manna), application
ProCAST software carries out stress deformation simulation to turbo blade, according to storing turbo blade grid joint
The joint that the .sm file of dot information, sheeld.dat file and shellgd.dat file are corresponding before and after finding out deformation
Point.Finite element grid information is processed by the method, owing to ProCAST software connects without secondary development
Mouthful, need to write gridding information processing routine, it is achieved the sequence of grid node and coupling.Finite element net
Lattice number of unit is huge, the most all hundreds of thousands grid, and workload is big, but also wants coding, no
It is applicable to actual production.The third is reference point matching method.The foundry goods obtained with simulation and castings desire
Shape contrasts, and does not deforms or deforms relatively small part and choose 3 during contrast on foundry goods
Individual reference point is mated, and i.e. obtains the deflection at each position of foundry goods.Document is " from the position of process of setting
Move the deformation extracting foundry goods in numerical simulation result " (foundry engieering, 1322-1326,2008,29 (10),
Cheng Jianguo, Kang Jinwu, Zhang Jiafeng) algorithm of application and development is to sand casting stress-frame specimen, roll stand
Foundry goods has carried out stress deformation calculating.Use reference point matching process to be analyzed, become intuitively
Shape result.The method is easy to understand, the advantage with simple and direct-viewing operation.But use reference point coupling
Method characterizes the deflection of marine copper alloy highly skewed propellers leaf, not yet has been reported that.
At present, computer modeling technique has been applied to the ess-strain calculating of casting forming process.Conventional
Stress-strain analysis business software have Magmasoft, ProCAST software etc..The foundry goods of simulation is also
Having multiple, including the simulation of blade class foundry goods, analog result is it is observed that the deformation of foundry goods becomes
Gesture, the deflection of different directions.But, carry out the research of reversible deformation design according to deformation result, only
It is limited to theoretical research, for the precision controlling of precision cast turbine blades, relate to reversible deformation design and grind
Study carefully.But the reversible deformation design studies for marine copper alloy highly skewed propellers leaf is not yet carried out.
Summary of the invention
It is an object of the invention to provide a kind of method manufacturing marine copper alloy highly skewed propellers leaf, solve
Prior art is rule of thumb added the postorder machining allowance that the method for designing of blade process allowance exists
Big or that machining allowance is not enough problem.
The technical solution adopted in the present invention is, a kind of method manufacturing marine copper alloy highly skewed propellers leaf,
Specifically implement according to following steps:
Step 1: modeling, specifically implements according to following steps:
(1) thermal physical property parameter and stress data to paddle material are tested, and obtain the hot thing of material
Property data；
(2) test casting, sand mold are carried out temperature survey, obtained by casting technique simulation software reverse
Interfacial heat transfer coefficient to foundry goods/casting mold；
(3) use casting technique simulation software Magmasoft that blade part is carried out stress deformation calculating,
Blade part model after output skew；Then use Geomagic studio software that this model is carried out
Repair process, obtains Rotor Blade Model；
(4) parameter point matching method is used, by the flange of Rotor Blade Model after Rotor Blade Model before deformation and deformation
Face coupling overlaps, and deforms forward and backward paddle flange centrage and is aligned to benchmark, uses Geomagic qualify
The alignment matching function of software, carries out the contrast of both models, obtains anti-deformation；
(5) with the same face of cylinder of different-diameter, the two model is intersected, it is thus achieved that intersection curve,
Then it is deployed in the plane tangent with the face of cylinder, obtains deforming forward and backward developed curve；
(6) according to the deflection of the forward and backward developed curve of deformation, increase anti-deformation in normal direction, obtain
Reversible deformation curve；Then, on the basis of reversible deformation curve, increase by the process allowance of 5～7mm,
To final curves；
(7) final curves are wound on the face of cylinder of correspondence, are modeled obtaining blade cast model；
Step 2: prepare blade according to model.
The feature of the present invention also resides in,
Step 2 therein is specifically implemented according to following steps:
(1) final curves in each cross section obtained according to step 1 make the cross sectional plates of blade；
(2) use screw pitch gauge moulding, make the pressure face of blade at lower sand mold, blow CO2Hardening sand mold,
And swabbing, baking；
(3) on the pressure face of sand mold, by hand each cross sectional plates is wound along the face of cylinder of its correspondence,
And bury water-glass sand；Upper end finishing molding sand according to cross sectional plates, makes suction surface, blows CO2Hardening,
Swabbing, baking；
(4) on the suction surface of sand mold, bury water-glass sand, blow CO2Hardening, after it hardens,
Sling, to its die cavity swabbing, baking；
(5) sand mold that step (3) makes is taken out, the sand mold that step (4) is made and step
(2) the sand mold mould assembly made, its internal die cavity is the die cavity of blade；
(6) running channel, rising head are made.
The invention has the beneficial effects as follows, reduce the process allowance of marine copper alloy highly skewed propellers leaf.Pin
To certain type marine copper alloy highly skewed propellers leaf, process allowance is reduced to 5～7mm from original 20mm.
At present, generally enough process allowances, this technique are added when casting process designs to blade face, blade back
Surplus includes the deflection that necessary process allowance and foundry goods produce in casting process.The present invention passes through
Accurately predict the deflection of blade, casting Technology Design increase anti-deformation, compensate blade deformation,
Reach to control the purpose of paddle size, only increase the process allowance of necessity, thus reach to reduce more than technique
The purpose of amount.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention models；
Fig. 2 be certain type blade peculiar to vessel deformation after model, in figure, 21 is that intersection curve is by the face of cylinder
Intersect the curve obtained with blade, 22 to be that intersection curve is deployed into by developed curve tangent with the face of cylinder
Plane on the curve that obtains；
Fig. 3 is certain type blade peculiar to vessel reversible deformation design, and in figure, 31 is the curve face of cylinder before deformation
Intersecting with blade part model, the curve after expansion, 32 is the curve face of cylinder and blade after deformation
After (part) deformation, model intersects, the curve after expansion, 33 be reversible deformation curve according to before deformation,
The deflection of rear curve, increases, in normal direction, the curve that anti-deformation obtains, and 34 is that final curves are instead
On the basis of deformation curve, increase the curve that certain process allowance obtains.
Detailed description of the invention
It is as follows that the inventive method is embodied as step:
Step 1: modeling；Specifically implement according to following steps:
(1) thermal physical property parameter and stress data to paddle material are tested, and obtain the hot thing of material
Property data；
(2) test casting, sand mold are carried out temperature survey, obtained by casting technique simulation software reverse
Interfacial heat transfer coefficient to foundry goods/casting mold；
(3) use casting technique simulation software Magmasoft that blade part is carried out stress deformation calculating,
Blade part model (stl form) after output skew；Then Geomagic studio software pair is used
This model carries out repair process, obtains Rotor Blade Model (prt form)；
(4) parameter point matching method is used, after front for deformation Rotor Blade Model (i.e. part model) and deformation
The flange face coupling of Rotor Blade Model overlaps, and deforms forward and backward paddle flange centrage and is aligned to benchmark, makes
By the alignment matching function of Geomagic qualify software, carry out the contrast of both models, obtain anti-
Deflection；
(5) with the same face of cylinder of different-diameter, the two model is intersected, it is thus achieved that intersection curve,
Then it is deployed in the plane tangent with the face of cylinder, obtains deforming forward and backward developed curve；
(6) according to the deflection of the forward and backward developed curve of deformation, increase anti-deformation in normal direction, obtain
Reversible deformation curve.Then, on the basis of reversible deformation curve, increase by the process allowance of 5～7mm,
To final curves；
(7) final curves are wound on the face of cylinder of correspondence, are modeled obtaining blade cast model.
Step 2: prepare blade according to model.
(1) final curves in each cross section obtained according to step 1 make the cross sectional plates of blade；
(2) use screw pitch gauge moulding, make the pressure face of blade at lower sand mold, blow CO2Hardening sand mold,
And swabbing, baking；
(3) on the pressure face of sand mold, by hand each cross sectional plates is wound along the face of cylinder of its correspondence,
And bury water-glass sand；Upper end finishing molding sand according to cross sectional plates, makes suction surface, blows CO2Hardening,
Swabbing, baking；
(4) on the suction surface of sand mold, bury certain thickness water-glass sand, blow CO2Hardening, treats
After its hardening, sling, to its die cavity swabbing, baking；
(5) being taken out by the sand mold that (3) make, the sand mold (4) made and (2) make
Sand mold mould assembly, its internal die cavity is the die cavity of blade.
(6) running channel, rising head are made.
Embodiment
Certain type highly skewed propellers peculiar to vessel leaf part, cast form.Blade foundry goods modeling process is as shown in Figure 1.
First simulate the blade part (containing dead head) stress in process of setting with Magmasoft software to become
Shape, the blade part model after output skew.This model is contrasted with blade part model, with
The flange face deforming forward and backward blade overlaps, and flange center's line is aligned to benchmark.Then different half is used
The same face of cylinder in footpath is intersected with deforming forward and backward blade part model, is then launched by intersection curve
To the plane tangent with Correspondent cy linder face, obtain developed curve, as shown in Figure 2.According to deformation before,
After developed curve, add anti-deformation and surplus in normal direction, obtain final curves, as shown in Figure 3.
The modeling of blade foundry goods is carried out according to final curves.Meanwhile, final curves are also used for making cross sectional plates,
Use when blade moulding.
The present invention uses numerical simulation software to calculate the stress deformation of blade part, with blade method
Blue face overlaps, and flange center's line is aligned to benchmark and carries out comparison and the extraction of deflection, at developed curve
Normal direction carry out the interpolation of anti-deformation and process allowance, obtain the cross sectional plates curve of blade foundry goods, use
Produce in foundry goods modeling and moulding.It is an advantage of the current invention that the deflection by predicting blade part,
Add anti-deformation when blade foundry goods designs, reduce process allowance and the machining of blade foundry goods
Amount；When blade Mechanical processing of casting is rule, on the basis of paddle flange face and flange center's line, facilitate
Scribing operation before blade processing.
Claims (2)
1. the method manufacturing marine copper alloy highly skewed propellers leaf, it is characterised in that specifically according to
Lower step is implemented:
Step 1: modeling, specifically implements according to following steps:
(1) thermal physical property parameter and stress data to paddle material are tested, and obtain the hot thing of material
Property data；
(2) test casting, sand mold are carried out temperature survey, obtained by casting technique simulation software reverse
Interfacial heat transfer coefficient to foundry goods/casting mold；
(3) use casting technique simulation software Magmasoft that blade part is carried out stress deformation calculating,
Blade part model after output skew；Then use Geomagic studio software that this model is carried out
Repair process, obtains Rotor Blade Model；
(4) parameter point matching method is used, by the flange of Rotor Blade Model after Rotor Blade Model before deformation and deformation
Face coupling overlaps, and deforms forward and backward paddle flange centrage and is aligned to benchmark, uses Geomagic qualify
The alignment matching function of software, carries out the contrast of both models, obtains anti-deformation；
(5) with the same face of cylinder of different-diameter, the two model is intersected, it is thus achieved that intersection curve,
Then it is deployed in the plane tangent with the face of cylinder, obtains deforming forward and backward developed curve；
(6) according to the deflection of the forward and backward developed curve of deformation, increase anti-deformation in normal direction, obtain
Reversible deformation curve；Then, on the basis of reversible deformation curve, increase by the process allowance of 5～7mm,
To final curves；
(7) final curves are wound on the face of cylinder of correspondence, are modeled obtaining blade cast model；
Step 2: prepare blade according to model.
The method of manufacture marine copper alloy highly skewed propellers leaf the most according to claim 1, its feature
Being, described step 2 is specifically implemented according to following steps:
(1) final curves in each cross section obtained according to step 1 make the cross sectional plates of blade；
(2) use screw pitch gauge moulding, make the pressure face of blade at lower sand mold, blow CO2Hardening sand mold,
And swabbing, baking；
(3) on the pressure face of sand mold, by hand each cross sectional plates is wound along the face of cylinder of its correspondence,
And bury water-glass sand；Upper end finishing molding sand according to cross sectional plates, makes suction surface, blows CO2Hardening,
Swabbing, baking；
(4) on the suction surface of sand mold, bury water-glass sand, blow CO2Hardening, after it hardens,
Sling, to its die cavity swabbing, baking；
(5) sand mold that step (3) makes is taken out, the sand mold that step (4) is made and step
(2) the sand mold mould assembly made, its internal die cavity is the die cavity of blade；
(6) running channel, rising head are made.
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| CN201410742298.3A CN104384447B (en) | 2014-12-03 | 2014-12-03 | A kind of method manufacturing marine copper alloy highly skewed propellers leaf |
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| CN201410742298.3A CN104384447B (en) | 2014-12-03 | 2014-12-03 | A kind of method manufacturing marine copper alloy highly skewed propellers leaf |
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| CN104384447B true CN104384447B (en) | 2016-10-05 |
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| CN109434020B (en) * | 2018-12-27 | 2020-05-19 | 大连船用推进器有限公司 | Method for selecting section plate for casting and molding special-shaped blade |
| CN114226641B (en) * | 2021-12-14 | 2022-12-20 | 上海交通大学 | Reversible deformation design method for investment precision casting based on node displacement transfer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706832A (en) * | 2009-11-25 | 2010-05-12 | 哈尔滨工业大学 | Optimization design method of fibre enhanced composite material marine propeller blade |
| CN101716653A (en) * | 2009-12-09 | 2010-06-02 | 宁夏共享铸钢有限公司 | Anti-deformation method for casting vane of ultra-large mixed flow type water turbine |
| CN103433435A (en) * | 2013-08-13 | 2013-12-11 | 苏州欧拉工程技术有限公司 | Manufacturing process of overall titanium alloy impeller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2003300693A1 (en) * | 2003-10-30 | 2005-05-19 | Virendra J. Mehta | Thruster system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101706832A (en) * | 2009-11-25 | 2010-05-12 | 哈尔滨工业大学 | Optimization design method of fibre enhanced composite material marine propeller blade |
| CN101716653A (en) * | 2009-12-09 | 2010-06-02 | 宁夏共享铸钢有限公司 | Anti-deformation method for casting vane of ultra-large mixed flow type water turbine |
| CN103433435A (en) * | 2013-08-13 | 2013-12-11 | 苏州欧拉工程技术有限公司 | Manufacturing process of overall titanium alloy impeller |
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