CN101695741B - Method for positioning mold core and mold shell of hollow blade - Google Patents
Method for positioning mold core and mold shell of hollow blade Download PDFInfo
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- CN101695741B CN101695741B CN200910188303XA CN200910188303A CN101695741B CN 101695741 B CN101695741 B CN 101695741B CN 200910188303X A CN200910188303X A CN 200910188303XA CN 200910188303 A CN200910188303 A CN 200910188303A CN 101695741 B CN101695741 B CN 101695741B
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Abstract
The invention discloses a method for positioning a mold core and a mold shell of a hollow blade, which belongs to the technical field of aero engines and combustion gas turbines. The expansion section of a blade tip is provided with a blade tip positioning point; the expansion section, wherein the blade tip positioning point is, of the blade tip serves as a fixed end and a surface direct contact is adopted; an exhaust side is coated with a free end, two positioning points are made on the free end, the mold core and the mold shell adopt point contact at the positions; an expansion section of tenon teeth also adopts point positioning; two tower type positioning points are made on the expansion section of the tenon teeth, and point direct contact is adopted; and a mold core blade basin and a blade back adopt the same positioning method and the positioning positions are symmetric. The method of the invention is a breakthrough of the traditional positioning method in the same industry in China and has the advantages that: operation in production is simple and convenient; the processing period of the blade casting is shortened; and the quality, qualification rate and production efficiency of the casting are improved. Production and test work proves that the blade casting produced by using the positioning method has the advantage that core deflection and breakage conditions are greatly reduced in a casting process.
Description
Technical field
The invention belongs to aero-engine and gas turbine technology field, be specifically related to the model casting technology of hollow blade foundry goods.
Background technology
Blade is the critical component of aero-engine.In the aero-engine in modern times was made, complicated inner cavity and the assurance blade dimensions and the accuracy of form and position in order to form blade mainly adopted model casting to finish the manufacturing of hollow turbine vane.
In hollow blade foundry goods manufacture process, core, shell and alloy itself are separately independently; But in process of setting, the complex-shaped surface mould that core and shell are formed is finally by alloy liquid filling formation metal blade foundry goods, and with regard to technology generally speaking, they are again non-individual bodies.In process of setting, along with the alloy liquid temp reduces, core, shell, alloy are pressed linear expansion coefficient contraction distortion separately; This contraction distortion by mutual restriction again, produces stress and concentrates; When this stress surpassed the limit that core can bear, it just was released, and the casting flaw that shows as the blade foundry goods is exactly disconnected core, leaks core, perhaps causes the wall thickness instability of blade.
The process employing of tradition core and shell location along Y coordinate direction " shaft type localization method ", shell is in roasting, cast and crystal pulling process, because shell is different with the core linear expansion coefficient and gap length control is bad, " axle location " unstable core is easy to produce fracture or along Y coordinate direction generation beat, causes blade basin, back wall thickness ununiformity to be spared.Therefore, how the anchor point of core in shell is set, makes core, shell still have relative free shrink distortion under long-time high temperature, producing less thermal stress each other is one of key that improves the blade casting qualified rate.
Summary of the invention
Weak point at above prior art existence, the invention provides the method for a kind of hollow blade core and shell location, with wall thickness dimension precision that improves the blade foundry goods and the qualification rate that improves the blade foundry goods, solve the core shift in the blade cast casting process, disconnected core problem.
According to high vortex blade ceramic core in the directional solidification process and shell temperature field characteristic distributions, and the analysis of physical characteristics such as core and the line expansion of shell own, when being set, the location of ceramic core adopts point, face direct contact type.
The blade tip extension is provided with the blade tip anchor point, and the face direct contact type is adopted as stiff end in the blade tip extension at blade tip anchor point place; The exhaust limit is coated with free end, and makes two anchor points on free end, and core and shell adopt the some contact herein; Point location is also adopted in the extension of tenon tooth, makes two tower anchor points in the tenon tooth extension, adopts the some direct contact type; The mold core blade basin is identical with the blade back localization method, the locating point position symmetry.This in the contact of blade tip employing face, the some contact is adopted on tenon tooth extension, exhaust limit, and dual mode combines and formed " locate mode links work at selected spots with that in entire areas ".
Anchor point is described as follows.
The size of four exhaust limit anchor points (two of blade backs, two in leaf basin) of four tower anchor points of tenon tooth of tenon tooth extension (two of blade backs, two in leaf basin) and exhaust limit free end and position dimension are according to the size regulation of blade.
The method processing that tower anchor point of tenon tooth and exhaust limit anchor point all adopt drill bit to drill through.
General blade tenon facewidth degree is 20～200mm's, the anchor point diameter can be made as 2～90mm, and the dessert spacing of two anchor points is 5～100mm on the leaf basin, and the dessert spacing of two anchor points also is 5～100mm on the blade back.
The method for designing of exhaust limit anchor point is: the core width that exposes wax-pattern is 2～100mm's, the diameter of anchor point is made as 0.5～80mm, the dessert spacing of two anchor points is made as 5～150mm on the leaf basin, and the dessert spacing of two anchor points also is 5～150mm on the blade back.
As blade foundry goods exhaust limit is window type, and then the exhaust limit can not add anchor point, only adopts blade tip and the tenon tooth extension two place's positioning instants can.The anchor point size is identical with above-mentioned no window blade with position dimension.
The blade tip anchor point is a rectangle, totally four (two of blade backs, two in leaf basin), and blade tip locating point position size and size are according to the size regulation of blade.General blade tip extension length is that 15～200mm, width are 15～180mm, and blade tip anchor point length is 8～150mm, and wide is 5～75mm.Two blade tip anchor point dessert are apart from being 2～130mm on the leaf basin, and two blade tip anchor point dessert distance is 2～130mm also on the blade back.
By the setting of above-mentioned core anchor point, positioning end, realized the location of core in shell.The inventive method does not adopt " shaft type localization method ", but blade tip basin, the back of the body still adopt two stiff ends, and two anchor points have respectively been added at basin, the back of blade tenon and trailing edge, this tower anchor point and the trailing edge (exhaust limit) of adding in the tenon tooth extension adds point type anchor point dual mode and combines and formed " locate mode links work at selected spots with that in entire areas ", overcome the shortcoming of axial location; Shell and core can relatively move in controlled gap simultaneously, have overcome the different cores that make with the line expansion factor of core of shell and have produced fracture.Adopt the wall thickness on blade foundry goods basin, the back of the body and exhaust limit that this kind localization method makes even, solved core shift, a disconnected core difficult problem.
The inventive method has broken through traditional localization method of the domestic same industry, and is simple, convenient in the production process, shortened the process-cycle of blade foundry goods, improved casting quality, qualification rate and production efficiency.Through pilot production work, the blade foundry goods that adopts this kind locate mode to produce has significantly reduced core shift, disconnected core situation in casting process.Further expand and be applied to as this method in the production process of other model engine and civilian goods combustion machine, then the economic benefit of its generation will be bigger.
Description of drawings
Fig. 1 is a blade back anchor point schematic diagram;
Fig. 2 is a leaf basin anchor point schematic diagram;
Fig. 3 is the blade and blade basin anchor point schematic diagram of window type for the exhaust limit.
Among the figure: the tower anchor point of 1 tenon tooth, 2 exhaust limit anchor points, 3 blade tip anchor points.
The specific embodiment
Further specify method of the present invention by the following examples.
According to high vortex blade ceramic core in the directional solidification process and shell temperature field characteristic distributions, and the analysis of physical characteristics such as core and the line expansion of shell own, when being set, the location of ceramic core adopts point, face direct contact type.
The blade tip extension is provided with the blade tip anchor point, and the face direct contact type is adopted as stiff end in the blade tip extension at blade tip anchor point place; The exhaust limit is coated with free end, and makes two anchor points on free end, and core and shell adopt the some contact herein; Point location is also adopted in the extension of tenon tooth, makes two tower anchor points in the tenon tooth extension, adopts the some direct contact type; The mold core blade basin is identical with the blade back localization method, the locating point position symmetry.This in the contact of blade tip employing face, the some contact is adopted on tenon tooth extension, exhaust limit, and dual mode combines and formed " locate mode links work at selected spots with that in entire areas ".
Anchor point is described as follows.
The size of four exhaust limit anchor points (two of blade backs, two in leaf basin) of four tower anchor points of tenon tooth of tenon tooth extension (two of blade backs, two in leaf basin) and exhaust limit free end and position dimension are according to the size regulation of blade.
The method processing that tower anchor point of tenon tooth and exhaust limit anchor point all adopt drill bit to drill through.
Blade tenon facewidth degree is 120mm, and the anchor point diameter is made as 45mm, and the dessert spacing of two anchor points is 60mm on the leaf basin, and the dessert spacing of two anchor points also is 60mm on the blade back.
The core width that exposes wax-pattern is 50mm, and the diameter of anchor point is made as 35mm, and the dessert spacing of two anchor points is made as 80mm on the leaf basin, and the dessert spacing of two anchor points also is 80mm on the blade back.
The blade tip anchor point is a rectangle, totally four (two of blade backs, two in leaf basin).Blade tip extension length is that 100mm, width are 90mm, and the blade tip anchor point is long to be 70mm, and wide is 30mm.Two blade tip anchor point dessert are apart from being 40mm on the leaf basin, and two blade tip anchor point dessert distance is 40mm also on the blade back.
By the setting of above-mentioned core anchor point, positioning end, realized the location of core in shell.
According to high vortex blade ceramic core in the directional solidification process and shell temperature field characteristic distributions, and the analysis of physical characteristics such as core and the line expansion of shell own, when being set, the location of ceramic core adopts point, face direct contact type.
The blade tip extension is provided with the blade tip anchor point, and the face direct contact type is adopted as stiff end in the blade tip extension at blade tip anchor point place; The exhaust limit is coated with free end, and makes two anchor points on free end, and core and shell adopt the some contact herein; Point location is also adopted in the extension of tenon tooth, makes two tower anchor points in the tenon tooth extension, adopts the some direct contact type; The mold core blade basin is identical with the blade back localization method, the locating point position symmetry.This in the contact of blade tip employing face, the some contact is adopted on tenon tooth extension, exhaust limit, and dual mode combines and formed " locate mode links work at selected spots with that in entire areas ".
Anchor point is described as follows.
The size of four exhaust limit anchor points (two of blade backs, two in leaf basin) of four tower anchor points of tenon tooth of tenon tooth extension (two of blade backs, two in leaf basin) and exhaust limit free end and position dimension are according to the size regulation of blade.
The method processing that tower anchor point of tenon tooth and exhaust limit anchor point all adopt drill bit to drill through.
Blade tenon facewidth degree is 200mm, and the anchor point diameter is made as 90mm, and the dessert spacing of two anchor points is 100mm on the leaf basin, and the dessert spacing of two anchor points also is 100mm on the blade back.
The method for designing of exhaust limit anchor point is: the core width that exposes wax-pattern is 100mm, and the diameter of anchor point is made as 80mm, and the dessert spacing of two anchor points is made as 150mm on the leaf basin, and the dessert spacing of two anchor points also is 150mm on the blade back.
The blade tip anchor point is a rectangle, totally four (two of blade backs, two in leaf basin).Blade tip extension length is that 200mm, width are 180mm, and the blade tip anchor point is long to be 150mm, and wide is 75mm.Two blade tip anchor point dessert are apart from being 85mm on the leaf basin, and two blade tip anchor point dessert distance is 85mm also on the blade back.
By the setting of above-mentioned core anchor point, positioning end, realized the location of core in shell.
According to high vortex blade ceramic core in the directional solidification process and shell temperature field characteristic distributions, and the analysis of physical characteristics such as core and the line expansion of shell own, when being set, the location of ceramic core adopts point, face direct contact type.
The blade tip extension is provided with the blade tip anchor point, and the face direct contact type is adopted as stiff end in the blade tip extension at blade tip anchor point place; The exhaust limit is coated with free end, and makes two anchor points on free end, and core and shell adopt the some contact herein; Point location is also adopted in the extension of tenon tooth, makes two tower anchor points in the tenon tooth extension, adopts the some direct contact type; The mold core blade basin is identical with the blade back localization method, the locating point position symmetry.This in the contact of blade tip employing face, the some contact is adopted on tenon tooth extension, exhaust limit, and dual mode combines and formed " locate mode links work at selected spots with that in entire areas ".
Anchor point is described as follows.
The size of four exhaust limit anchor points (two of blade backs, two in leaf basin) of four tower anchor points of tenon tooth of tenon tooth extension (two of blade backs, two in leaf basin) and exhaust limit free end and position dimension are according to the size regulation of blade.
The method processing that tower anchor point of tenon tooth and exhaust limit anchor point all adopt drill bit to drill through.
Blade tenon facewidth degree is 20mm, and the anchor point diameter is made as 2mm, and the dessert spacing of two anchor points is 5mm on the leaf basin, and the dessert spacing of two anchor points also is 5mm on the blade back.
The method for designing of exhaust limit anchor point is: the core width that exposes wax-pattern is 2mm, and the diameter of anchor point is made as 0.5mm, and the dessert spacing of two anchor points is made as 5mm on the leaf basin, and the dessert spacing of two anchor points also is 5mm on the blade back.
The blade tip anchor point is a rectangle, totally four (two of blade backs, two in leaf basin).Blade tip extension length is that 15mm, width are 15mm, and the blade tip anchor point is long to be 8mm, and wide is 5mm.Two blade tip anchor point dessert are apart from being 2mm on the leaf basin, and two blade tip anchor point dessert distance is 2mm also on the blade back.
By the setting of above-mentioned core anchor point, positioning end, realized the location of core in shell.
Embodiment 4
According to high vortex blade ceramic core in the directional solidification process and shell temperature field characteristic distributions, and the analysis of physical characteristics such as core and the line expansion of shell own, when being set, the location of ceramic core adopts point, face direct contact type.
The blade tip extension is provided with the blade tip anchor point, and the face direct contact type is adopted as stiff end in the blade tip extension at blade tip anchor point place; The exhaust limit is coated with free end, and makes two anchor points on free end, and core and shell adopt the some contact herein; Point location is also adopted in the extension of tenon tooth, makes two tower anchor points in the tenon tooth extension, adopts the some direct contact type; The mold core blade basin is identical with the blade back localization method, the locating point position symmetry.This in the contact of blade tip employing face, the some contact is adopted on tenon tooth extension, exhaust limit, and dual mode combines and formed " locate mode links work at selected spots with that in entire areas ".
Anchor point is described as follows.
The size of four exhaust limit anchor points (two of blade backs, two in leaf basin) of four tower anchor points of tenon tooth of tenon tooth extension (two of blade backs, two in leaf basin) and exhaust limit free end and position dimension are according to the size regulation of blade.
The method processing that tower anchor point of tenon tooth and exhaust limit anchor point all adopt drill bit to drill through.
Blade tenon facewidth degree is 200mm, and the anchor point diameter is made as 90mm, and the dessert spacing of two anchor points is 100mm on the leaf basin, and the dessert spacing of two anchor points also is 100mm on the blade back.
The method for designing of exhaust limit anchor point is: the core width that exposes wax-pattern is 100mm, and the diameter of anchor point is made as 80mm, and the dessert spacing of two anchor points is made as 150mm on the leaf basin, and the dessert spacing of two anchor points also is 150mm on the blade back.
The blade tip anchor point is a rectangle, totally four (two of blade backs, two in leaf basin).Blade tip extension length is that 200mm, width are 180mm, and the blade tip anchor point is long to be 150mm, and wide is 30mm.Two blade tip anchor point dessert are apart from being 130mm on the leaf basin, and two blade tip anchor point dessert distance is 130mm also on the blade back.
By the setting of above-mentioned core anchor point, positioning end, realized the location of core in shell.
Embodiment 5
According to high vortex blade ceramic core in the directional solidification process and shell temperature field characteristic distributions, and the analysis of physical characteristics such as core and the line expansion of shell own, when being set, the location of ceramic core adopts point, face direct contact type.
The blade tip extension is provided with the blade tip anchor point, and the face direct contact type is adopted as stiff end in the blade tip extension at blade tip anchor point place; Point location is also adopted in the extension of tenon tooth, makes two tower anchor points in the tenon tooth extension, adopts the some direct contact type, and the mold core blade basin is identical with the blade back localization method, the locating point position symmetry.This in the contact of blade tip employing face, the some contact is adopted in the tenon tooth extension, and dual mode combines and formed " locate mode links work at selected spots with that in entire areas ".
Anchor point is described as follows.
The size of four exhaust limit anchor points (two of blade backs, two in leaf basin) of four tower anchor points of tenon tooth of tenon tooth extension (two of blade backs, two in leaf basin) and exhaust limit free end and position dimension are according to the size regulation of blade.
The method processing that tower anchor point of tenon tooth and exhaust limit anchor point all adopt drill bit to drill through.
Blade tenon facewidth degree is 100mm, and the anchor point diameter is made as 30mm, and the dessert spacing of two anchor points is 40mm on the leaf basin, and the dessert spacing of two anchor points also is 40mm on the blade back.
Blade foundry goods exhaust limit is a window type, and the exhaust limit does not add anchor point, only adopts blade tip and two places, tenon tooth extension location.The blade tip anchor point is a rectangle, totally four (two of blade backs, two in leaf basin).Blade tip extension length is that 100mm, width are 80mm, and the blade tip anchor point is long to be 70mm, and wide is 20mm.Two blade tip anchor point dessert are apart from being 40mm on the leaf basin, and two blade tip anchor point dessert distance is 40mm also on the blade back.
By the setting of above-mentioned core anchor point, positioning end, realized the location of core in shell.
Claims (1)
1. the method for hollow blade core and shell location, it is characterized in that: the blade tip extension is provided with the blade tip anchor point, and the face direct contact type is adopted as stiff end in the blade tip extension at blade tip anchor point place; The exhaust limit is coated with free end, and makes two anchor points on free end, and core and shell adopt the some contact herein; Point location is also adopted in the extension of tenon tooth, makes two tower anchor points in the tenon tooth extension, adopts the some direct contact type; The mold core blade basin is identical with the blade back localization method, the locating point position symmetry, and the anchor point characteristics are as follows:
Blade tenon facewidth degree is 20～200mm's, and the anchor point diameter is made as 2～90mm, and the dessert spacing of two anchor points is 5～100mm on the leaf basin, and the dessert spacing of two anchor points also is 5～100mm on the blade back;
The method for designing of exhaust limit anchor point is: the core width that exposes wax-pattern is 2～100mm's, the diameter of anchor point is made as 0.5～80mm, the dessert spacing of two anchor points is made as 5～150mm on the leaf basin, and the dessert spacing of two anchor points also is 5～150mm on the blade back;
The blade tip anchor point is a rectangle, totally four, blade tip extension length is that 15～200mm, width are 15～180mm's, blade tip anchor point length is 8～150mm, wide is 5～75mm, two blade tip anchor point dessert are apart from being 2～130mm on the leaf basin, and two blade tip anchor point dessert distance is 2～130mm also on the blade back.
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| CN200910188303XA CN101695741B (en) | 2009-10-30 | 2009-10-30 | Method for positioning mold core and mold shell of hollow blade |
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| CN200910188303XA CN101695741B (en) | 2009-10-30 | 2009-10-30 | Method for positioning mold core and mold shell of hollow blade |
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| CN101695741B true CN101695741B (en) | 2011-03-30 |
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Address after: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee after: Chinese Hangfa Shenyang Liming Aero engine limited liability company Address before: 110043 Dong TA street, Dadong District, Shenyang, Liaoning Province, No. 6 Patentee before: Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City |