CN109443146B - Integrated base for blade measurement - Google Patents
Integrated base for blade measurement Download PDFInfo
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- CN109443146B CN109443146B CN201811495958.7A CN201811495958A CN109443146B CN 109443146 B CN109443146 B CN 109443146B CN 201811495958 A CN201811495958 A CN 201811495958A CN 109443146 B CN109443146 B CN 109443146B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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Abstract
The invention provides an integrated base for blade measurement, which is a rectangular block formed by casting low-melting-point alloy and surrounding a tenon tooth, and comprises a first side vertical face, a second side vertical face, a third side vertical face and a fourth side vertical face which are connected in sequence, wherein the first side vertical face and/or the third side vertical face is parallel to an x axis of a theoretical reference coordinate system of a blade, the second side vertical face and/or the fourth side vertical face is parallel to a y axis of the theoretical reference coordinate system, and the rectangular block further comprises a first horizontal plane vertical to a z axis of the theoretical reference coordinate system.
Description
Technical Field
The invention relates to the technical field of aero-engine production, in particular to an integrated base for measuring blade parts in the production process of turbine blades of small and medium-sized aero-engines.
Background
In the manufacturing process of the aircraft engine, the turbine blade can be formed by casting a single blade part in a precision casting mode, and then the single blade part is assembled on the flange plate to form a turbine whole.
FIG. 1a is a schematic perspective view of a first stage turbine blade; FIG. 1b is a schematic perspective view of a two-stage turbine blade; FIG. 1c is a schematic perspective view of a free-turbine blade; FIG. 2a is a schematic illustration of a blade profile sizing of the first stage turbine blade of FIG. 1 a; FIG. 2b is a schematic illustration of platform sizing of the first stage turbine blade of FIG. 1 a; FIG. 2c is a schematic illustration of a measurement of the tip tab slot dimensions of the dovetail for the stage one turbine blade of FIG. 1 a; in fig. 2c, a schematic front view and a schematic left view of the measuring fixture during the measuring process are shown.
Referring to fig. 1a-2c, in the manufacturing process of a gas turbine, for each individual turbine blade casting produced through a precision casting process, it is generally required to measure the blade profile size of the blade body 11, the size of the platform 12 and the size of the locking plate slot 131 at the top of the tenon tooth 13 after the turbine blade 1 is cast, so as to judge whether the cast single blade is a qualified product.
In the existing measurement process, for the measurement of the blade profile size, as shown in fig. 2a, a pair of rolling rods 2 (corresponding special rolling rods 2, that is, rolling rods 2 with different diameters are designed for different types of blades 1) are required to clamp the tenon tooth 13 on a special vice, during the measurement, the rolling rods 2 are firstly aligned for establishing a coordinate system used during the blade measurement, and then a special measuring tool (not shown in the figure) is used for measuring the blade profile size of the blade body 11.
For the measurement of the dimension of the flange 12, as shown in fig. 2b, a special measuring tool is used to clamp all the tenon teeth 13, expose the flange 12, and measure the dimension of the flange 12 with a special measuring tool (not shown).
For the dimension measurement of the locking piece slot 131 at the top of the tenon tooth 13, as shown in fig. 2c, a special measurement tool needs to be used to clamp the tenon tooth 13 and expose the top tooth portion, so that the locking piece slot 131 can not be blocked, and then a special measurement tool (not shown in the figure) is used to measure the relevant dimension of the locking piece slot 131.
Although each individual turbine blade 1 produced by the precision casting process has a cylindrical process boss 14 with dimensional accuracy guaranteed, the process boss 14 is mainly used for clamping and positioning of subsequent machining processes in the existing production process, and the process boss 14 is not physically used (for example, clamping, positioning and the like) in the existing measurement process.
As shown in fig. 2a, in the conventional blade measurement process, the theoretical reference coordinate system of the blade 1 is generally established by using the rolling rods 2 tightly clamping the tenon teeth 13 of the blade 1 (generally, the first pair of concave parts clamped at two sides of the top teeth of the tenon teeth 13 as shown in fig. 2 a) to establish a datum plane, that is, an x-y plane is established according to the axes of two theoretically parallel rolling rods 2, the axis of the cylindrical process boss 14 of the blade 1 is taken as a z-axis, the intersection point of the z-axis and the x-y plane is taken as an origin, the x-axis passes through the origin and is parallel to the axis of the rolling rods 2, and the y-axis is perpendicular to the x-axis. In the theoretical reference coordinate system of the blade 1, the z-axis is used to indicate the position relationship among the blade body 11, the platform 12 and the tenon tooth 13, and it is usually directed in the direction from the tenon tooth 13 to the blade body 11, and the x-axis and the y-axis are mainly used to indicate the tooth shape of the tenon tooth 13, so the directions of the x-axis and the y-axis can be adjusted according to the need (e.g. the matching convenience with the reference coordinate system of the measuring tool during the measurement), that is, the direction of the x-axis may be the direction from the air inlet side of the blade to the air outlet side, or vice versa, and the direction of the y-axis may be the direction from the basin side to the back side of the blade, or vice versa.
During the measurement with different measuring tools or for different types of blades, the theoretical reference coordinate system can be translated according to the actual conditions of the measuring tools, i.e. for the measuring instruments to facilitate reading, the origin of the theoretical reference coordinate system of the blade 1 can be moved in the direction of the three coordinate axes by Δ x, Δ y, Δ z, respectively, so as to be able to coincide with the reference coordinate system of the measuring instrument. Of course, it will be appreciated by those skilled in the art that the theoretical reference frame of the blade may also be rotated as shown in figures 2b, 2c in order to facilitate operation of the surveying instrument.
As described above, for different turbine blades as shown in fig. 1a to 1c, the existing measurement process methods are all that, when measuring the blade profile of the blade body 11, a dedicated measurement tool is used to clamp the tenon tooth 13 (for example, a first pair of concave parts on both sides of the top tooth of the tenon tooth 13 are clamped by a pair of rolling bars 2 on a dedicated vice) to expose the blade profile, and the size of the blade profile is measured by positioning the tenon tooth 13; when the relevant dimension of the locking piece slot 131 at the top of the tenon tooth 13 is measured, replacing a special measuring tool, clamping most of the tenon teeth 13 and exposing the tops of the tenon teeth, thereby measuring the relevant dimension of the locking piece slot 131; when the size of the flange plate 12 is measured, a plurality of sets of special measuring tools need to be replaced according to the change of the measuring position, the tenon tooth 13 is clamped to expose the measured position of the flange plate 12, and the relevant size is measured.
The existing measuring method has a complex and complicated process, for example, when the blade profile is measured, in the process of clamping the roller bars 2 by using a vice, the horizontal degree of the two roller bars 2 can finally influence the precision of the blade profile data obtained by measurement, so that an operator has to have rich experience to ensure the efficiency of the process of clamping the roller bars 2; and for the special measuring tool for measuring the flange plate 12 and the locking plate groove 131, as shown in fig. 2b and 2c, if the gap of the installation groove is too large, the blade state after clamping is difficult to ensure to be consistent, and if the gap is too small, the blade is difficult to be installed, so that the manufacturing difficulty of the installation groove is large, and the precision is difficult to ensure. Moreover, in order to avoid damage to the blade, the hardness of the material used for manufacturing the special measuring tool (especially the mounting groove position) is generally lower than that of the blade 1, so that the mounting groove is easily worn during use, and the size is changed.
In the measuring process, each measuring part needs a special tool, so that each blade needs multiple sets of special tools, and the production cost is high. In addition, the large number of the tools also causes great management difficulty and increases the maintenance difficulty of the tools. And because the whole process is manually operated, the clamping and measuring process of each size requires a skilled operation skill of an operator.
The existing measuring process has low operation efficiency. For at least hundreds of finished products of various blade precision castings in each batch in actual production, each blade needs to be measured, so that the measuring process needs to consume a long time, and the measuring process can become one of important factors for prolonging the whole production period.
Disclosure of Invention
The technical problem underlying the present invention is to provide an integrated base for blade measurement that reduces or avoids the aforementioned problems.
In order to solve the technical problem, the invention provides an integrated base for blade measurement, which is used for measuring the blade profile size of the blade body of the turbine blade, the size of the flange plate and the size of the locking plate groove at the top of the tenon tooth, which is a rectangular block cast from a low melting point alloy surrounding the cog, the blade groove is not covered by the low melting point alloy, the turbine blade having a theoretical reference frame, the z-axis of which coincides with the axis of the process boss of the blade, the x-y plane of the theoretical reference coordinate system can be established by two axes of two standard rollers in a clamping state, wherein the two axes can clamp the first pair of concave parts on two sides of the top tooth of the tenon tooth, the intersection point of the z axis and the x-y plane is an origin, the x axis passes through the origin and is parallel to the axes of the rollers, and the y axis is perpendicular to the x axis. The rectangular block comprises a first side elevation, a second side elevation, a third side elevation and a fourth side elevation which are connected in sequence, the first side elevation and/or the third side elevation is parallel to an x-axis of the theoretical reference coordinate system, the second side elevation and/or the fourth side elevation is parallel to a y-axis of the theoretical reference coordinate system, and the rectangular block further comprises a first horizontal plane 31 which is perpendicular to a z-axis of the theoretical reference coordinate system and is close to the locking piece groove.
Preferably, the smallest distance between the top surface of the rectangular block and the flange plate in the z-axis direction is not less than 2 mm.
Preferably, the smallest distance between the first and/or third and second and/or fourth side elevations of the rectangular block and the rim plate is not less than 5 mm.
Preferably, the maximum distance between the first and/or third and second and/or fourth side elevations of the rectangular block and the rim plate is no more than 30 mm.
Preferably, the minimum distance between the first horizontal plane and the lock piece groove in the z-axis direction is greater than 1.5 mm.
The integrated base for blade measurement greatly shortens the measurement period of the blade and effectively reduces the production cost and the maintenance cost.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein the content of the first and second substances,
FIG. 1a is a schematic perspective view of a first stage turbine blade;
FIG. 1b is a schematic perspective view of a two-stage turbine blade;
FIG. 1c is a schematic perspective view of a free-turbine blade;
FIG. 2a is a schematic illustration of a blade profile sizing of the first stage turbine blade of FIG. 1 a;
FIG. 2b is a schematic illustration of platform sizing of the first stage turbine blade of FIG. 1 a;
FIG. 2c is a schematic illustration of a measurement of the tip tab slot dimensions of the dovetail for the stage one turbine blade of FIG. 1 a;
FIG. 3a is a schematic illustration of a turbine blade for airfoil sizing using an integrated pedestal for blade sizing according to an embodiment of the present invention;
FIG. 3b is a schematic illustration of platform sizing of the turbine blade of FIG. 3 a;
FIG. 3c is a schematic illustration of a tooth top cleat slot size measurement taken on the turbine blade of FIG. 3 a;
FIG. 4a is a schematic partial cross-sectional structural view of a casting apparatus for preparing the susceptor of FIG. 3 a;
FIG. 4b is a schematic partial cross-sectional structural view of the casting apparatus of FIG. 4a in a top view;
FIG. 5 is a schematic partial cross-sectional structural view of a solvent-shaping device for shaping the rectangular block manufactured by the casting device of FIG. 4 a;
fig. 6 is a schematic perspective view of the rectangular block processed by the dissolution and reshaping apparatus of fig. 5.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.
FIG. 1a is a schematic perspective view of a first stage turbine blade; FIG. 2a is a schematic illustration of a blade profile sizing of the first stage turbine blade of FIG. 1 a; FIG. 3a is a schematic illustration of a bucket positioning bed fabricated by a method of fabricating a bucket positioning bed according to an embodiment of the present invention for measuring the profile dimensions of a turbine bucket; FIG. 3b is a schematic illustration of platform sizing of the turbine blade of FIG. 3 a; FIG. 3c is a schematic illustration of a tooth top cleat slot size measurement taken on the turbine blade of FIG. 3 a; FIG. 4a is a schematic partial cross-sectional structural view of a casting apparatus for preparing the susceptor of FIG. 3 a; FIG. 4b is a schematic partial cross-sectional structural view of the casting apparatus of FIG. 4a in a top view; FIG. 5 is a schematic partial cross-sectional structural view of a solvent-shaping device for shaping the rectangular block manufactured by the casting device of FIG. 4 a; fig. 6 is a schematic perspective view of the rectangular block processed by the dissolution and reshaping apparatus of fig. 5. Referring to fig. 1a, 2a, 3a-6, the present invention provides an integrated base for blade measurement, which is used for measuring the blade profile dimension of the blade body 11, the dimension of the flange 12 and the dimension of the locking plate slot 131 at the top of the tenon tooth 13 of a turbine blade 1, wherein the rectangular block 3 surrounding the tenon tooth 13 is formed by casting low-melting point alloy, the locking plate slot 131 is not covered by the low-melting point alloy, the rectangular block 3 is exposed, the turbine blade 1 has a theoretical reference coordinate system, the z-axis of the theoretical reference coordinate system is coincident with the axis of the process boss 14 of the blade 1, the x-y plane of the theoretical reference coordinate system can be established by two axes of two standard rolling rods 2 which can clamp the first pair of concave parts at two sides of the top tooth of the tenon tooth 13 in a clamping state, the intersection point of the z-axis and the x-y plane is the origin, the x-axis passes through the origin and is parallel to the axis of the roller 2, and the y-axis is perpendicular to the x-axis. The rectangular block 3 comprises a first side elevation, a second side elevation, a third side elevation and a fourth side elevation which are connected in sequence, the first side elevation and/or the third side elevation is parallel to the x axis of the theoretical reference coordinate system, the second side elevation and/or the fourth side elevation is parallel to the y axis of the theoretical reference coordinate system, the rectangular block 3 further comprises a first horizontal plane 31 which is perpendicular to the z axis of the theoretical reference coordinate system and close to the locking piece groove 131, and the minimum distance between the top surface of the rectangular block and the flange plate 12 in the z axis direction is not less than 2 mm.
Because the low-melting-point alloy has good hardness and strength, the rectangular block 3 surrounding the tenon tooth 13 is formed by casting the low-melting-point alloy, and the low-melting-point alloy shrinks towards the tenon tooth 13 after being cooled, solidified and shaped, so that the tenon tooth 13 is firmly clamped by the tooth profile of the tenon tooth 13.
The method for manufacturing the rectangular block 3 may include the steps of:
step A, constructing a casting cavity, wherein the casting cavity comprises at least one horizontal molded surface for molding the first horizontal surface 31 and at least two mutually perpendicular molding side walls which are perpendicular to the horizontal molded surface and are sequentially connected, and vertically hoisting the blade 1 above the casting cavity to enable the flange plate 12 to be arranged above the casting cavity, the tenon tooth 13 to be arranged in the casting cavity, wherein the z axis of the theoretical reference coordinate system of the blade 1 is perpendicular to the horizontal molded surface, and the x axis and the y axis are respectively parallel to the mutually perpendicular molding side walls.
When the rectangular block 3 needs to be manufactured, a casting device 4 shown in fig. 4a and 4b can be adopted, the casting device 4 includes a casting base 41, a positioning template 42 and a casting cavity 43, the casting base 41 is connected with a first lifting arm 411 capable of lifting, a bearing is installed on the first lifting arm 411, a first process boss fixing device 44 is rotatably connected with the bearing, the process boss 14 of the blade 1 to be measured is inserted and installed in the first process boss fixing device 44, the blade 1 is locked in the first process boss fixing device 44 through a screw, the blade 1 is hung on the first lifting arm 411, the position of the first lifting arm 411 in the vertical direction is locked through adjustment, so that the directions of the x axis, the y axis and the z axis of the theoretical reference coordinate system of the blade 1 can be fixed, but the blade 1, i.e. the theoretical reference frame, can be rotated on the first boom 411. Then, the positioning template 42 corresponding to the blade 1 to be measured is mounted on the casting base 41, so that the angular direction of the blade 1 can be fixed by the contact between the positioning template 42 and the flange 12 of the blade 1, and thus all degrees of freedom of the blade 1 are fixed.
The first process boss fixing device 44 is provided with an insertion hole which is matched (clearance fit) with the process boss 14, and a fixing screw is connected in the insertion hole, so that the connection relationship between the blade 1 and the first process boss fixing device can be fixed by inserting the process boss 14 into the insertion hole and tightening the screw. The process boss 14 of the blade 1 is mounted on the first process boss fixture 44, which makes it possible to fix, immovable, but rotatable along the bearing center, the x, y, z directions of the theoretical reference coordinate system of the blade 1. For different types of turbine blades, a dedicated positioning template 42 can be manufactured for each type of the blade 1, as shown in fig. 4a and 4b, the positioning template 42 can be fixedly connected with the casting base 41 through fastening screws, and through the auxiliary positioning of the positioning template 42, the blade 1 connected with the process boss fastening device 44 can be ensured to stably stay in the casting cavity 43, and the theoretical reference coordinate system of the blade 1 can be ensured to be parallel to the coordinate system of the side wall of the casting cavity 43. That is, two opposite side walls of the casting cavity 43 are respectively parallel to the x-axis and the y-axis of the theoretical reference coordinate system, and when the different types of blades 1 are replaced, the different types of blades 1 can be positioned only by loosening fastening screws, and removing and replacing the corresponding positioning templates 42.
In fig. 4a and 4b, the casting cavity 43 is shown as a single piece, but it will be understood by those skilled in the art that as a casting cavity, at least one side of the casting cavity 43 may be formed by a removable flap for facilitating removal of the rectangular block 3 after casting, and of course, at least one side of the casting cavity 43 may be inclined to the outside.
The casting cavity 43 may be a T-shaped cavity as shown in fig. 4a, so that the T-shaped surface 431 of the casting cavity 43 may be used as a horizontal surface for forming the first horizontal surface 31, and since the casting process completely covers the locking piece groove 131 covering the top of the tenon tooth 13, the casting cavity 43 may be a T-shaped cavity, which may prevent the first horizontal surface 31 formed by the T-shaped surface 431 from being damaged in the subsequent process of removing the excessive low-melting-point alloy structure and may be used as a reference surface for facilitating subsequent operations.
Of course, the casting cavity 43 may be a generally rectangular cavity, that is, the bottom surface of the casting cavity 43 may be a horizontal profile, as long as the locking piece groove 131 is exposed during subsequent processing.
The side wall of the casting cavity 3 where the positioning template 42 is located and the adjacent side walls can be used as the forming side walls, and are used for ensuring that at least two side walls of the rectangular block 3 can be parallel to the x axis and the y axis of the theoretical reference coordinate system of the blade 1 respectively.
And B, pouring low-melting-point alloy in the casting cavity of the step A, and forming a blank of the rectangular block 3.
For example, in the casting apparatus 4 shown in fig. 4a and 4b, after the blade 1 is placed in position, a low-melting-point alloy may be poured into the casting cavity 43, and after the low-melting-point alloy is brushed on the low-melting-point alloy with cold water by using a brush after the pouring, the low-melting-point alloy may be cooled and solidified after waiting for about 5 seconds, the screws of the process boss fixing device 44 may be loosened, and when at least one side surface of the casting cavity 43 is formed by a detachable movable baffle, the movable baffle of the casting cavity 43 may be removed, and the suspension arm 411 may be lifted, so that the blade 1 on which the rectangular block 3 is disposed may be taken out. When at least one side of the casting cavity 43 is inclined outwardly. The boom 411 can be lifted directly and the blade 1 provided with the rectangular block 3 can be taken out.
And step C, carrying out local heating treatment on the blank of the rectangular block 3 manufactured in the step B, and melting and eliminating the alloy structure covering the lock piece groove 131 to completely expose the lock piece groove 131. The manufacture of the rectangular block 3 is completed.
The blade 1 with the rectangular block 3 prepared by the apparatus 4 cannot meet the requirement of the whole measuring process because the rectangular block 3 wraps the whole tenon tooth 13, and if the rectangular block 3 is cast by a T-shaped cavity and the first horizontal surface 31 is formed by the T-shaped surface 431, the portion of the rectangular block 3 wrapping the locking piece groove 131 can be ablated by immersing the blade 1 in hot oil, that is, the portion of the T-shaped extension corresponding to the lower portion of the T-shaped surface 431 of the casting cavity 43 is immersed in hot oil, so that the low melting point alloy of the portion is ablated to expose the locking piece groove 131. The immersion into the hot oil is only required to ensure that the first horizontal surface 31 formed by the T-shaped surface 431 does not contact with the hot oil, and the integrity of the first horizontal surface 31 can be ensured, that is, the first horizontal surface 31 can be ensured to play a positioning role in the subsequent measurement process.
If the rectangular block 3 is cast by a rectangular cavity, that is, the bottom surface of the rectangular block 3 is the first horizontal surface 31, only the alloy structure at the position of the locking piece slot 131 can be removed, and the first horizontal surface 31 at other positions can be kept from being ablated, for example, as shown in fig. 5 and 6, a dissolving and shaping device 5 can be provided, the dissolving and shaping device 5 comprises a shaping base 51, the shaping base 51 is connected with a second lifting arm 511 which can be lifted, the second lifting arm 511 is rotatably connected with a second process boss fastening device 54, the process boss 14 of the blade 1 to be tested is inserted and installed in the second process boss fixing device 54, the blade 1 is locked in the second process boss fixing device 54 by a screw, so that the blade 1 is hung on the second lifting arm 511, the shaping base 51 is provided with a working cavity 52, the working cavity 52 is arranged below the second suspension arm 511, the side wall of the working cavity 52 is provided with at least one hot oil spray head 521 pointing to the middle upper part of the working cavity 52, the bottom of the working cavity 52 is provided with an oil outlet, the hot oil spray head 521 and the oil outlet are both connected with a hot oil circulation processing device 6 through pipelines, when the hot oil spray head 521 sprays oil, the highest point of a hot oil running track does not exceed the top surface of the working cavity 52, after the blade 1 is hung on the second suspension arm 511, the second suspension arm 511 is lowered down, the position of the blade 1 is adjusted, the rectangular block 3 enters the working cavity 52, and the locking piece groove 131 area is ensured to be in the hot oil running track when the hot oil spray head 521 sprays oil, the hot oil circulation processing device 6 is started, so that the hot oil spray head 521 starts to spray hot oil with the temperature not lower than 180 ℃, then, the blade 1 is rotated, after the alloy covering the area of the locking piece slot 131 is melted by hot oil, the second suspension arm 511 is lifted, the blade 1 is taken down, and the preparation of the rectangular block 3 is completed.
When the locking piece slot 131 is measured, a measuring head and a profile can be used for measuring by adopting a coordinate measuring machine and other equipment, so that the blank of the rectangular block 3 formed in the step B can meet the measurement requirement only by completely exposing the locking piece slot 131, but not necessarily exposing the alloy block on the top tooth (first tooth) of the whole tenon tooth, so that hot oil sprayed by the hot oil spray head 521 can be sprayed on the alloy covering the area of the locking piece slot 131 only by presetting the hot oil spray track of the hot oil spray head 521 and controlling the position of the blade 1, and further, the alloy of other parts cannot be melted. Fig. 6 is a schematic perspective view of the rectangular block processed by the dissolution and shaping device of fig. 5, and fig. 6 is mainly used to illustrate the profile change of the rectangular block after the alloy is removed from the rectangular block, so that no blade is shown in the figure, and as shown in fig. 6, with the dissolution and shaping device 5 provided by the present invention, although the removed alloy portion at the bottom of the rectangular block 3 is not regular, the requirement of measurement can be satisfied as long as the locking piece groove 131 is completely exposed. This allows to greatly reduce the need for hot oil, thus reducing energy consumption, reducing costs, and ensuring the integrity of said first level 31.
As shown in fig. 5, the bottom surface of the working chamber 52 may be provided with an inclined surface, so as to facilitate the collection and recovery of the hot oil dropped in the working chamber 52 from the oil outlet, and the hot oil circulation processing device 6 may include a cooling tank (not shown) and a heater (not shown) connected in series, and the specific structure may refer to the structure of the cooling tank and the heater adopted in the blade cavity low melting point alloy removing device provided by the inventor's team in chinese patent 201611189008.2, and will not be described herein again. Through the hot oil circulation treatment equipment 6, the temperature of hot oil sprayed by the hot oil spray head 521 can be guaranteed, and low-melting-point alloy dissolved in the hot oil can be timely recovered.
After the blade 1 is suspended on the second process platform fixture 54, the z-axis position of the blade 1 is fixed on the second suspension arm 511, so that the position of the blade 1, that is, the position of the rectangular block 3, can be controlled by controlling the elevation of the second suspension arm 511, that is, more precisely controlling the position of the blade 1.
The second process boss fixing device 54 may be rotatably connected to the second suspension arm 511 through a bearing, so that the blade 1 may be manually rotated, such that the alloy covering the area of the locking piece slot 131 may be removed without residue, and in order to better control the rotation of the blade 1, the second process boss fixing device 54 may be provided with a rod portion 541 extending out of the top surface of the second suspension arm 511 after being fixedly connected to the bearing on the second suspension arm 511, such that the rod portion 541 extending out may be connected to the motor 7 through a belt, a gear, or the like, so as to more precisely control the rotation speed of the blade 1, and the rotation speed of the blade 1 may be controlled within 10-20 rpm.
When only one hot oil spray head 521 is arranged, the alloy coating the locking piece groove 131 can be completely dissolved by spraying for about 8-10 minutes. The hot oil spray heads 521 can be arranged in a plurality of numbers, for example, two or four, symmetrically arranged in the working chamber 52, or two adjacent side walls, so that the time required for spraying can be reduced, and the shaping efficiency can be improved. However, this also increases the complexity of the structure of the shaping base 51, which leads to an increase in cost.
Since the first side elevation and/or the third side elevation of the rectangular block 3 are parallel to the x-axis of the theoretical reference coordinate system, the second side elevation and/or the fourth side elevation are parallel to the y-axis of the theoretical reference coordinate system, and the first horizontal plane 31 is perpendicular to the z-axis of the theoretical reference coordinate system, i.e. the first horizontal plane 31 is parallel to the x-y plane, the reference coordinate system of the blade 1 can be defined by limiting the outer surface of the rectangular block 3, and the theoretical reference coordinate system of the blade 1 can be easily made parallel to the reference coordinate system of the measuring instrument, so that the blade 1 can be conveniently positioned and fixed by using similar fixtures capable of limiting at least three surfaces in each measuring stage, and the reference coordinate system of the measuring instrument can be conveniently adjusted to coincide with the theoretical reference coordinate system of the blade 1, the measuring tool and the measuring tool structure in each measuring process can be simplified. And improve the measurement efficiency.
The first side elevation and/or the third side elevation and the second side elevation and/or the fourth side elevation of the rectangular block 3 are mainly used for clamping and positioning, and in the subsequent measurement process, the reference coordinate system of the blade 1 can be controlled by positioning the process boss 14, so that the blade 1 and the flange plate 12 only need to be not too close to each other and have a certain distance (for example, the minimum distance is not less than 5mm, the maximum distance is not more than 30mm, and if the distance is too large, the rectangular block 3 is easy to have a large volume, and the energy consumption of the manufacturing process is wasted), therefore, in the step a, when the blade 1 to be measured is fixed, only the flange plate 12 needs to be kept at a certain distance from the side wall of the casting cavity 43, and of course, by arranging the positioning sample plate 42, the coordinate system of the rectangular block 3 cast by the same type of the blade 1 can be stabilized, thereby facilitating subsequent batch standardization measurement.
The minimum distance between the top surface of the rectangular block 3 and the flange 12 in the z-axis direction is greater than 2mm, which can ensure the space requirement for measuring the size of the flange 12.
If the rectangular block 3 is cast by a T-shaped cavity and the first horizontal surface 31 is formed by the T-shaped surface 431, the minimum distance between the first horizontal surface 31 and the locking piece groove 131 in the z-axis direction can be greater than 1.5 mm. This leaves sufficient measurement space for the locking piece slot 131.
If the rectangular block 3 is cast by a rectangular cavity, that is, the bottom surface of the rectangular block 3 is the first horizontal surface 31, it is only necessary to ensure that the locking piece grooves 131 are completely exposed out of the rectangular block 3, that is, the locking piece grooves 131 are not covered by alloy structures.
In practice, for 3 types of turbine blades of a certain type of engine, the base provided by the invention can greatly simplify the structures of a measuring tool and a measuring tool in the measuring process, so that the preparation time for updating the measuring tool is greatly reduced, and compared with the original process method in the background art, the time for construction period can be shortened by about 50%. Moreover, because the measuring tools are reduced, the production cost is greatly reduced, and the tool cost can be reduced by about 60 percent compared with the original measuring method in the background technology. In the measuring process, because the planes such as the side vertical face and the horizontal plane of the rectangular block 3 are positioned and clamped, the high-precision loose block positioning in the background technology can be avoided, the manufacturing cost of the tool is reduced, and the difficulty in tool maintenance is also reduced.
The integrated base for blade measurement greatly shortens the measurement period of the blade and effectively reduces the production cost and the maintenance cost.
It should be appreciated by those of skill in the art that while the present invention has been described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including technical equivalents which are related to the embodiments and which are combined with each other to illustrate the scope of the present invention.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations can be made by those skilled in the art without departing from the spirit and principles of the invention.
Claims (5)
1. An integrated pedestal for blade measurement, characterized in that it is used for measuring the blade profile dimension of the blade body, the edge plate dimension and the locking plate groove dimension of the tenon tooth top of a turbine blade, it is a rectangular block formed by casting low-melting point alloy and surrounding the tenon tooth, the locking plate groove is not covered by low-melting point alloy, the turbine blade has a theoretical reference coordinate system, the z axis of the theoretical reference coordinate system is coincident with the axis of the process boss of the blade, the x-y plane of the theoretical reference coordinate system is established by two standard rollers capable of clamping the first pair of recesses at both sides of the top tooth of the tenon tooth in two axes of the clamping state, the intersection point of the z axis and the x-y plane is the origin, the x axis passes through the origin and is parallel to the axes of the rollers, the y axis is perpendicular to the x axis, the rectangular block comprises a first side, a second side, a third side, a fourth side and a fourth side, and a fourth, The rectangular block comprises a theoretical reference coordinate system, a second side elevation, a third side elevation and a fourth side elevation, wherein the first side elevation and/or the third side elevation is parallel to an x axis of the theoretical reference coordinate system, the second side elevation and/or the fourth side elevation is parallel to a y axis of the theoretical reference coordinate system, and the rectangular block further comprises a first horizontal plane which is perpendicular to a z axis of the theoretical reference coordinate system and is close to the lock piece groove.
2. The integrated base for blade measurement of claim 1, wherein the top surface of the rectangular block is not less than 2mm from the platform in the z-axis direction.
3. The integrated base for blade measurement according to claim 1, wherein the first and/or third and second and/or fourth side elevations of the rectangular block have a minimum distance from the rim plate of not less than 5 mm.
4. The integrated base for blade measurement according to claim 1, wherein the first and/or third and second and/or fourth side elevations of the rectangular block have a maximum distance from the rim plate of not more than 30 mm.
5. The integrated base for blade measurement of claim 1, wherein the minimum distance in the z-axis direction between the first horizontal plane and the blade slot is greater than 1.5 mm.
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| CN201811495958.7A CN109443146B (en) | 2018-12-07 | 2018-12-07 | Integrated base for blade measurement |
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| CN109443146B true CN109443146B (en) | 2020-10-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE507572C2 (en) * | 1993-02-05 | 1998-06-22 | Abb Stal Ab | Equipment for handling and prodn. of turbine blade |
| CN201368713Y (en) * | 2009-03-20 | 2009-12-23 | 无锡润和叶片制造有限公司 | Clamp for measuring throat width of movable vane of steam turbine |
| CN201795761U (en) * | 2010-08-12 | 2011-04-13 | 四川省自贡市海川实业有限公司 | Device for detecting and correcting turbine blade shroud cambered surface |
| CN203018721U (en) * | 2012-12-03 | 2013-06-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Positioning fixture platform for blade |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2207629B (en) * | 1987-07-22 | 1991-01-02 | Rolls Royce Plc | Method of manufacture of an axial flow compressor assembly |
| JPH06134815A (en) * | 1992-10-29 | 1994-05-17 | Olympus Optical Co Ltd | Method for accurately casting simplified injection mold |
| CN101513708A (en) * | 2009-03-19 | 2009-08-26 | 无锡透平叶片有限公司 | Method for locating datum surface to process leaf blade and blade root |
| US20120055583A1 (en) * | 2010-09-08 | 2012-03-08 | Schnatter John H | Sauce Leveler Device |
| CN102145460A (en) * | 2010-11-20 | 2011-08-10 | 无锡透平叶片有限公司 | Novel integral turning method of blades |
| CN202304719U (en) * | 2011-10-20 | 2012-07-04 | 常州市三维技术成套设备有限公司 | Arc fir tree blade root measuring device |
| CN103350213B (en) * | 2013-07-04 | 2016-09-07 | 常州市三维技术成套设备有限公司 | Low-melting alloy casting positioning process in turbine Blade Machining |
| CN105382202B (en) * | 2015-12-04 | 2017-05-10 | 南车玉柴四川发动机股份有限公司 | Method for meeting positioning requirement of complex-shaped workpiece through alloy casting |
-
2018
- 2018-12-07 CN CN201811495958.7A patent/CN109443146B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE507572C2 (en) * | 1993-02-05 | 1998-06-22 | Abb Stal Ab | Equipment for handling and prodn. of turbine blade |
| CN201368713Y (en) * | 2009-03-20 | 2009-12-23 | 无锡润和叶片制造有限公司 | Clamp for measuring throat width of movable vane of steam turbine |
| CN201795761U (en) * | 2010-08-12 | 2011-04-13 | 四川省自贡市海川实业有限公司 | Device for detecting and correcting turbine blade shroud cambered surface |
| CN203018721U (en) * | 2012-12-03 | 2013-06-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Positioning fixture platform for blade |
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