CN109317980A - A kind of Blade measuring pedestal preparation facilities - Google Patents
A kind of Blade measuring pedestal preparation facilities Download PDFInfo
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- CN109317980A CN109317980A CN201811495932.2A CN201811495932A CN109317980A CN 109317980 A CN109317980 A CN 109317980A CN 201811495932 A CN201811495932 A CN 201811495932A CN 109317980 A CN109317980 A CN 109317980A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 title abstract 6
- 238000005266 casting Methods 0.000 claims abstract description 63
- 238000005520 cutting process Methods 0.000 claims abstract description 48
- 238000007493 shaping process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 42
- 239000000956 alloy Substances 0.000 claims description 23
- 229910045601 alloy Inorganic materials 0.000 claims description 23
- 238000005096 rolling process Methods 0.000 claims description 18
- 239000000725 suspension Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000004513 sizing Methods 0.000 description 9
- 238000002844 melting Methods 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 4
- 238000005495 investment casting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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Abstract
A kind of Blade measuring pedestal preparation facilities, it includes the casting equipment and a cutting equipment for the blank progress shaping to the rectangular block of a blank for the rectangular block of casting, the casting equipment includes casting pedestal, stationary positioned block and active positioning block, the stationary positioned block is fixedly connected with the casting pedestal, the active positioning block and the casting pedestal slidable connection, the stationary positioned block is provided with the stationary gripping part with the consistent type face of the semicircle cambered surface of the standard roller, the active positioning block is provided with the movable clamping part with the consistent type face of the semicircle cambered surface of the standard roller, the cutting equipment includes cutting base and cutting rack, the cutting rack and the removable connection of the cutting base.A kind of Blade measuring pedestal preparation facilities provided by the present invention is substantially shorter the measurement duration of blade, while can reduce production cost and maintenance cost by preparing standardized base.
Description
Technical Field
The invention relates to the technical field of aero-engine production, in particular to a device for preparing a 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 measurements with different measuring tools or for different types of blades, the theoretical reference coordinate system may 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 may be displaced △ x, △ y, △ z in the direction of the three coordinate axes, respectively, so as to be able to coincide with the reference coordinate system of the measuring 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 to be solved by the present invention is to provide a device for preparing a blade measuring base, so as to reduce or avoid the aforementioned problems.
In order to solve the above technical problems, the present invention provides a device for manufacturing a blade measuring base, the base being used for measuring a blade profile dimension of a blade body of a turbine blade, a size of a rim plate and a size of a locking plate groove at a top of a tenon tooth, the base being a rectangular block cast from a low melting point alloy and surrounding the tenon tooth, the locking plate groove not being covered by the low melting point alloy, the turbine blade having a theoretical reference coordinate system, a z-axis of the theoretical reference coordinate system coinciding with an axis of a process boss of the blade, an x-y plane of the theoretical reference coordinate system being established by two axes of a clamping state of two standard rollers capable of clamping a first pair of recesses at both sides of the top tooth of the tenon tooth, an intersection point of the z-axis and the x-y plane being an origin, the x-axis passing through the origin and being parallel to the axes of the rollers, 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 sequentially connected, 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, the rectangular block further comprises a first horizontal plane which is perpendicular to a z axis of the theoretical reference coordinate system and close to the locking piece groove, and the minimum distance between the top surface of the rectangular block and the edge plate in the z axis direction is not less than 2 mm. The device comprises a casting device for casting the blank of the rectangular block and a cutting device for shaping the blank of the rectangular block, wherein the casting device comprises a casting base, a fixed positioning block and a movable positioning block, the fixed positioning block is fixedly connected with the casting base, the movable positioning block is slidably connected with the casting base, the fixed positioning block is provided with a fixed clamping part of a profile consistent with the semi-circular arc surface of the standard rolling rod, the movable positioning block is provided with a movable clamping part of the profile consistent with the semi-circular arc surface of the standard rolling rod, the cutting device comprises a cutting base and a cutting frame, the cutting base is connected with a liftable second suspension arm, the second suspension arm is provided with a second process boss fastening device, the cutting frame is provided with a liftable U-shaped support, and heating wires are installed on the U-shaped support, the cutting frame is movably connected with the cutting base.
Preferably, the casting base is provided with three side walls which are connected in sequence, the fixed positioning block is fixedly connected with the casting base by depending on the middle side wall, a guide groove is formed in one side of the casting base opposite to the middle side wall, and the movable positioning block is connected with the casting base in a sliding mode through a guide block matched with the guide groove.
Preferably, the casting base is provided with a lifting rod on the side wall in the middle, a horizontal telescopic rod is arranged at the top of the lifting rod, and the horizontal telescopic rod comprises a T-shaped rod.
Preferably, the fixed clamping part is marked with scales.
According to the blade measuring base preparation device provided by the invention, the standardized base is prepared, so that the measuring period of the blade can be greatly shortened, and meanwhile, the production cost and the maintenance cost can be reduced.
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,
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 view of a base prepared by a blade measuring base preparation device according to an embodiment of the present invention for blade profile sizing of a turbine blade;
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 base of FIG. 3 a;
FIG. 4b is a schematic view of the structure of FIG. 4a in a partial section;
FIG. 4c is a schematic perspective view of the backup bar of FIG. 4 a;
FIG. 4d is a schematic perspective view of a rectangular block formed by the casting apparatus of FIG. 4 a;
fig. 5 is a schematic view of a partial cross-sectional structural principle of a cutting apparatus for cutting the rectangular block prepared in fig. 4 a.
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 view of a base prepared by a blade measuring base preparation device according to an embodiment of the present invention for blade profile sizing of a turbine blade; 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 base of FIG. 3 a; FIG. 4b is a schematic view of the structure of FIG. 4a in a partial section; FIG. 4c is a schematic perspective view of the backup bar of FIG. 4 a; FIG. 4d is a schematic perspective view of a rectangular block formed by the casting apparatus of FIG. 4 a; fig. 5 is a schematic view of a partial cross-sectional structural principle of a cutting apparatus for cutting the rectangular block prepared in fig. 4 a. Referring to fig. 1a, 2a, 3a-5, the present invention provides a blade measuring base preparation device, the base is used for measuring the blade profile size of a blade body 11 of a turbine blade 1, the size of a flange 12 and the size of a locking plate groove 131 at the top of a tenon tooth 13, the rectangular block 3 surrounding the tenon tooth 13 is formed by casting low-melting point alloy, the locking plate groove 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 a 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 a 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. The casting device 4 comprises a casting device 4 for casting a blank of the rectangular block 3 and a cutting device 5 for shaping the blank of the rectangular block 3, the casting device 4 comprises a casting base 41, a fixed positioning block 42 and a movable positioning block 43, the fixed positioning block 42 is fixedly connected with the casting base 41, the movable positioning block 43 is slidably connected with the casting base 41, the fixed positioning block 42 is provided with a fixed clamping part 422 with a profile consistent with the semi-circular arc surface of the standard rolling rod 2, the movable positioning block 43 is provided with a movable clamping part 432 with a profile consistent with the semi-circular arc surface of the standard rolling rod 2, a first tooth socket (namely a first pair of concave parts) of the tenon tooth 13 of the blade 1 is attached to the fixed clamping part 422 of the fixed positioning block 42, and then the movable positioning block 43 is moved, the movable clamping portion 432 and the fixed clamping portion 422 are used for clamping and fixing the tenon tooth 13, and then the movable positioning block 43 is fixed, so that the blade 1 can be clamped and fixed by clamping the tenon tooth 13 on a pair of standard rolling rods 2 on a special vice in the prior art for measuring the blade profile dimension as described in the background art.
Referring to fig. 4a and 4b, the casting base 41 may be provided with three sidewalls connected in sequence, the fixed positioning block 42 may be fixedly connected to the casting base 41 by a countersunk bolt (not shown) or the like depending on the middle sidewall, the casting base 41 may be provided with a guide slot 411 at a side opposite to the middle sidewall, such that the movable positioning block 43 may be slidably connected to the casting base 41 by providing a guide block matching with the guide slot 411, and when the movable clamping portion 432 and the fixed clamping portion 422 form a clamping fixation to the tenon 13, the three sidewalls of the casting base 41 and the movable positioning block 43 may form a closed cavity for casting a low melting point alloy.
The fixed clamping portion 422 and the movable clamping portion 432 are both provided with a profile which is consistent with the semi-circular arc surface of the standard rolling rod 2, so that the x-y plane of the theoretical reference coordinate system of the blade 1 can be fixed by clamping and fixing the tenon tooth 13 by the fixed clamping portion 422 and the movable clamping portion 432, and because only the fixable line of the movable clamping portion 432 moves linearly during operation, the clamping of the fixed clamping portion 422 and the movable clamping portion 432 is easier to operate than the clamping of the tenon tooth 13 by the pair of standard rolling rods 2 on a special vice during the measurement of the size of the blade profile in the prior art, which is described in the background art, so that the skill requirement of an operator can be greatly reduced.
For different types of blades 1, the casting base 41 can be used for forming a closed cavity for casting the low-melting-point alloy by only providing the corresponding fixed positioning block 42 and the corresponding movable positioning block 43 according to a targeted design. Therefore, the manufacturing cost of the tool can be greatly reduced.
For convenience of operation, the casting base 41 may be further provided with a lifting rod 412 on the middle side wall, the top of the lifting rod is provided with a horizontal telescopic rod 413, the horizontal telescopic rod 413 comprises a T-shaped rod 414, so that, for each type of said blades 1, the clamping of the first piece of said blade 1 can be carried out by a skilled worker by hand, when the first piece of said blade 1 is clamped and fixed, the position of the T-bar 414 can be adjusted so that the cross-bar of the T-head of the T-bar 414 comes into abutment with the technological boss 14 of the blade 1, and fixes the position of the T-bar 414 so that, during subsequent clamping of the blade 1, even if unskilled operators can also utilize the T-shaped rod 414 to complete the positioning of the initial position of the blade 1, so that the clamping difficulty can be reduced, and the clamping efficiency can be greatly improved.
The fixed positioning top surface 421 of the fixed positioning block 42 may be used to form the first horizontal surface 31, and as long as the precision of the movable positioning block 43 can be well controlled, the movable positioning top surface 431 of the movable positioning block 43 may also be used to form the first horizontal surface 31, and of course, in the subsequent measurement process, only the surface formed by the fixed positioning top surface 421 of the fixed positioning block 42 may be used as the first horizontal surface 31, so that the manufacturing requirement on the fixed positioning top surface 421 of the movable positioning block 43 may be reduced, and the manufacturing cost may be reduced.
Since the clamping of the standard roller 2 to the blade 1 can be repeated by the fixed clamping portion 422 and the movable clamping portion 432, the first side elevation, the third side elevation, the second side elevation and the fourth side elevation of the blade 1 can be easily prepared by the side wall of the closed cavity for casting the low melting point alloy, which is formed by the casting base 41 and the movable positioning block 43.
And pouring the low-melting-point alloy in a closed cavity formed by the casting base 41 and the movable positioning block 43 and used for pouring the low-melting-point alloy, brushing the low-melting-point alloy with a brush dipped in cold water after pouring, waiting for about 5 seconds, and taking out the blade 1 provided with the rectangular block 3 by loosening the movable positioning block 43 after the low-melting-point alloy is cooled and solidified.
Since the fixed clamping portion 422 and the movable clamping portion 432 can clamp the tenon tooth 13, no low-melting-point alloy part exists at the clamped position of the tenon tooth 13 on the rectangular block 3 which is cast, that is, a cavity exists in the position of the rectangular block 3 where the tenon tooth 13 is clamped.
FIG. 4d is a schematic perspective view of a rectangular block formed by the casting apparatus of FIG. 4 a; referring to fig. 4d, a schematic perspective view of the rectangular block 3 is shown, wherein the two symmetrical grooves on the two sides of the rectangular block 3 are the strip-shaped cavities 32 formed by the fixed clamping parts 422 and the movable clamping parts 432, and the top protrusions are the structures formed by the space of the low-melting-point alloy flowing into the guide slots 411.
The cutting device 5 comprises a cutting base 51 and a cutting frame 52, the cutting base 51 is connected with a second liftable suspension arm 511, the second suspension arm 511 is provided with a second process boss fastening device 54, the process boss 14 of the blade 1 to be measured is inserted and installed in the second process boss fastening device 54, the blade 1 is locked in the second process boss fastening device 54 through screws, the blade 1 is hung on the second suspension arm 511, the position of the second suspension arm 511 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, the cutting frame 52 is provided with a liftable U-shaped support 521, the U-shaped support 521 is provided with an electric heating wire 522, the electric heating wire can reach 230 ℃ after being heated, and the electric heating wire 522 can be used for cutting the blade by moving the cutting frame 52 along the cutting base 51, and the electric heating wire 522 is used for cutting the blade 1 By cutting the alloy part of the bottom of the tenon tooth 13 covering the locking piece slot 131 and adjusting the height of the U-shaped bracket 521, the heating wire 522 can be ensured to cut only the alloy part below the first horizontal plane 31, so that the first horizontal plane 31 is not affected. I.e. to accommodate alloy cutting for different types of blades. After cutting, the alloy part at the bottom of the tenon tooth 13 covering the lock piece slot 131 naturally falls off, so that the rectangular block 3 is prepared.
As mentioned above, since the rectangular block 3 has a cavity at the position where the tenon tooth 13 is clamped, when the cutting frame 52 is operated, it is easy to have the first horizontal surface 31 formed by the fixed positioning top 421 as a reference, thereby facilitating the cutting of the alloy portion covering the locking piece slot 131.
In the casting process, no special requirement is required on the top surface of the rectangular block 3, so that the rectangular block is not in contact with the flange plate 12 by eyes, and the side walls of the casting base 41 or the movable positioning block 43 can be marked with scale marks, so that the casting operation is more convenient.
Referring to fig. 5, the second suspension arm 511 may be provided with a bearing, and the second process platform fixing device 54 is rotatably connected with the second suspension arm 511 via the bearing, so that after the blade 1 is hung on the second suspension arm 511, the directions of the x, y and z axes of the theoretical reference coordinate system of the blade 1 are fixed, but the theoretical reference coordinate system can still rotate on the second suspension arm 511. Then, a positioning template 55 corresponding to the blade 1 to be measured is provided and mounted on the cutting base 51, so that the angular direction of the blade 1 can be fixed by the fitting of the positioning template 55 and the flange 12 of the blade 1, thereby fixing all degrees of freedom of the blade 1. Therefore, the same track of the cutting frame 52 is obtained when cutting the same type of blade, and the control of the movement of the cutting frame 52 can be simplified by arranging corresponding guide rails on the cutting base 51.
The casting device 4 and the cutting device 5 may share a base, that is, the casting base 41 and the cutting base 51 may be on the same base plate, so that all operations may be performed at one station.
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.
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, when the blade 1 to be measured is fixed, the flange plate 12 only needs to be kept at a certain distance from the side wall of the casting cavity 43, and of course, the coordinate system of the rectangular block 3 cast by the same type of the blade 1 can be controlled to be stable by marking scales on the fixed clamping part 422, 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 can be controlled to be larger than 2mm, so that the space requirement for measuring the size of the flange 12 can be ensured.
The minimum distance between the first horizontal surface 31 and the locking piece slot 131 in the z-axis direction can be greater than 1.5 mm. This leaves sufficient measurement space for the locking piece slot 131.
In practice, for 3 kinds of turbine blades of a certain type of engine, the base manufactured by the device can greatly simplify the structures of a measuring tool and a measuring tool in the measuring process, so that the preparation time for replacing the measuring tool is greatly shortened, 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.
According to the blade measuring base preparation device provided by the invention, the standard base is prepared, so that the measuring period of the blade can be greatly shortened, and meanwhile, the production cost and the maintenance cost can be reduced.
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 (4)
1. A blade measuring base preparation device is characterized in that the base is used for measuring the blade profile size of the blade body of a turbine blade, the size of an edge plate and the size of a locking plate groove at the top of a tenon tooth, the base is a rectangular block which is formed by casting low-melting-point alloy and surrounds the tenon tooth, the lock piece 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 sequentially connected, 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, the rectangular block further comprises a first horizontal plane which is perpendicular to a z axis of the theoretical reference coordinate system and close to the locking piece groove, and the minimum distance between the top surface of the rectangular block and the edge plate in the z axis direction is not less than 2 mm. The device comprises a casting device for casting the blank of the rectangular block and a cutting device for shaping the blank of the rectangular block, wherein the casting device comprises a casting base, a fixed positioning block and a movable positioning block, the fixed positioning block is fixedly connected with the casting base, the movable positioning block is slidably connected with the casting base, the fixed positioning block is provided with a fixed clamping part of a profile consistent with the semi-circular arc surface of the standard rolling rod, the movable positioning block is provided with a movable clamping part of the profile consistent with the semi-circular arc surface of the standard rolling rod, the cutting device comprises a cutting base and a cutting frame, the cutting base is connected with a liftable second suspension arm, the second suspension arm is provided with a second process boss fastening device, the cutting frame is provided with a liftable U-shaped support, and heating wires are installed on the U-shaped support, the cutting frame is movably connected with the cutting base.
2. The device of claim 1, wherein the casting base is provided with three side walls connected in sequence, the fixed positioning block is fixedly connected with the casting base by the middle side wall, the casting base is provided with a guide groove at the side opposite to the middle side wall, and the movable positioning block is slidably connected with the casting base through a guide block matched with the guide groove.
3. The device of claim 1, wherein the casting base is provided with a lifting rod on the middle side wall, and a horizontal telescopic rod is arranged at the top of the lifting rod and comprises a T-shaped rod.
4. The method of claim 1, wherein the fixed clamp is marked with a scale.
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| CN201811495932.2A CN109317980B (en) | 2018-12-07 | 2018-12-07 | Blade measuring base preparation device |
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| CN201811495932.2A CN109317980B (en) | 2018-12-07 | 2018-12-07 | Blade measuring base preparation device |
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| CN109317980B CN109317980B (en) | 2021-02-09 |
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