CN112518513B - Device and method for machining symmetrical straight grooves on large-radius arc of turbine blade - Google Patents
Device and method for machining symmetrical straight grooves on large-radius arc of turbine blade Download PDFInfo
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- CN112518513B CN112518513B CN202011537902.0A CN202011537902A CN112518513B CN 112518513 B CN112518513 B CN 112518513B CN 202011537902 A CN202011537902 A CN 202011537902A CN 112518513 B CN112518513 B CN 112518513B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to a turbine blade large radius arc symmetrical straight groove processing device, which comprises: the side surface of the vertical mounting plate is provided with a blade positioning area, a blade body placing area and a blade processing area which are distributed from bottom to top; the first positioning seat, the second positioning seat, the first bracket and the second bracket are arranged in the blade positioning area; the blade body pressing mechanism is arranged in the blade body placing area, and the suspension seat is arranged in the blade processing area. The invention also relates to a processing method using the device for processing the symmetrical straight groove on the large-radius arc of the turbine blade, which comprises the following steps: s1, mounting a bottom mounting surface of a blade; s2, enabling the blade to be located at a first machining position, and S3, machining a first straight groove; s4, adjusting the bottom mounting surface for mounting the blade, S5, enabling the blade to be located at a second machining position, and S6, machining a second straight groove. The invention realizes that two mutually symmetrical straight grooves can be simultaneously processed on the large-radius arc of the turbine blade by only one blade body pressing mechanism, and has convenient operation and high processing effect.
Description
Technical Field
The invention belongs to the technical field of aero-engines, and particularly relates to a device and a method for machining symmetrical straight grooves on a large-radius arc of a turbine blade.
Background
The turbine blade is an important component part of a turbine section in an aircraft engine, and the surface shape of the turbine blade is usually designed into a twisted variable cross-section curved surface and is complex. The turbine blade is provided with a circular arc edge, namely a radius arc, and symmetrical straight grooves need to be machined on the circular arc edge so as to meet the application requirement of the turbine blade. The straight groove is a groove with a right angle included angle between the groove depth direction and the groove top plane, and the processing requirement is very strict because the angle of the straight groove is fixed.
At present, the traditional symmetrical straight groove processing mode with angles on the large-radius arc of the turbine blade is to finish processing by adopting a forming milling cutter through a horizontal milling machine, the milling machine can give full play to the efficiency of the milling cutter, cut at high speed and process a plurality of grooves on one device. However, the product machined by the milling machine through the milling cutter has many burrs and low dimensional accuracy, and the requirement for machining the turbine blade of the aero-engine is difficult to meet.
In view of this, a need exists for a machining device capable of machining a symmetrical straight groove on a large-radius arc of a turbine blade by using a common two-axis creep feed grinder, so as to solve the deficiencies of the prior art.
Disclosure of Invention
The invention provides a device for machining symmetrical straight grooves on a large-radius arc of a turbine blade, which aims to solve the technical problems that the symmetrical straight grooves machined by a milling machine through a cutter have more burrs and low dimensional precision and are difficult to meet the requirement of machining of blades of aero-engines.
The technical scheme for solving the technical problems is as follows:
a turbine blade large radius arc symmetrical straight flute processingequipment, it includes: a base, a vertical mounting plate, a first positioning seat, a second positioning seat, a first bracket, a second bracket, a blade body pressing mechanism and a suspension seat,
the vertical mounting plate is fixedly arranged above the base, and the side surface of the vertical mounting plate is provided with a blade positioning area, a blade body placing area and a blade processing area which are distributed from bottom to top;
the first positioning seat and the second positioning seat are horizontally arranged in the blade positioning area at intervals, a first positioning pin is arranged at the top of the first positioning seat, a second positioning pin is arranged at the top of the second positioning seat, the first positioning pin and the second positioning pin both extend towards the top of the vertical mounting plate, and the included angle between the length center line of the first positioning pin and the length center line of the second positioning pin is X;
the first bracket and the second bracket are horizontally arranged in the blade positioning area at intervals, the first bracket is positioned between the first positioning seat and the second positioning seat, and the distance from the first bracket to the first positioning seat is smaller than the distance from the first bracket to the second positioning seat; the second bracket is positioned between the first positioning seat and the second positioning seat, and the distance from the second bracket to the first positioning seat is greater than the distance from the second bracket to the second positioning seat;
the length center line direction of the first bracket is perpendicular to the length center line direction of the first positioning pin, and the length center line direction of the second bracket is perpendicular to the length center line direction of the second positioning pin;
the blade body pressing mechanism is fixedly installed in the blade body placing area, and the suspension seat is fixedly installed in the blade machining area.
The invention has the beneficial effects that:
(1) according to the invention, through the matching of the first positioning seat, the second positioning seat, the first bracket and the second bracket, particularly through limiting the included angle between the length center line of the first positioning pin and the length center line of the second positioning pin, the two straight grooves are always positioned on the horizontal plane at the respective processing positions, so that two mutually symmetrical straight grooves can be simultaneously processed on the large-radius arc of the blade by only one blade body pressing mechanism, the operation is convenient, and the processing efficiency of the blade is improved;
(2) the symmetrical straight groove processing device on the large-radius arc of the blade avoids the arrangement of a plurality of blade body pressing mechanisms for processing the straight groove, saves the cost and realizes more application possibilities of a two-axis machine tool;
(3) the invention ensures that the part to be processed of the large-radius arc of the blade is accurately positioned, and lays a foundation for vertically grinding the grinding wheel and improving the processing quality of the straight groove.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, X is 10-15 degrees.
The beneficial effect of adopting the further scheme is that: through the restriction the length center line of first locating pin with the contained angle between the length center line of second locating pin can cooperate the radian change of the big radius arc of blade, makes the processing position be in on the horizontal machined surface all the time, and convenient processing goes on.
Further, leaf body hold-down mechanism is including compressing tightly fixing base, pivot, compressing tightly pole and stand, compress tightly the fixing base with the stand horizontal interval set up in on the district is placed to the leaf body, compress tightly the one end of pole through the pivot with it is articulated to compress tightly the fixing base, compress tightly the other end of pole pass through the bolt with the connection can be dismantled to the stand.
The beneficial effect of adopting the further scheme is that: the movement of the blade body can be limited through the pressing rod, and the stability in the process of machining the straight groove is improved.
Furthermore, a buffer pressure reducing piece is fixedly arranged on one side, facing the side face of the vertical mounting plate, of the pressing rod.
The beneficial effect of adopting the further scheme is that: the pressure of the pressing rod on the blade body can be relieved through the buffer decompression part, and the damage to the blade body is avoided.
Further, the buffer decompression part is an aluminum block or a copper block.
Furthermore, a hanging shaft extends out of the side face of the hanging seat, and the length center line of the hanging shaft is perpendicular to the side face of the vertical mounting plate.
The beneficial effect of adopting the further scheme is that: the suspension shaft can provide a supporting part for the top large-radius arc mounting surface of the blade, so that the top large-radius arc mounting surface of the blade can be hung on the suspension seat.
In addition, the invention also provides a processing method using the device for processing the symmetrical straight groove on the large-radius arc of the turbine blade, which comprises the following steps:
s1, erecting the bottom mounting surface of the blade on a first bracket, and propping against one side surface of the bottom mounting surface of the blade through a first positioning pin of a first positioning seat;
s2, hanging the top large-radius arc mounting surface of the blade in the step S1 on the suspension seat, and then pressing the blade body of the blade through the blade body pressing mechanism to enable the blade to be positioned at a first processing position;
s3, vertically grinding the top large-radius arc mounting surface of the blade by using a grinding wheel at the first processing position of the step S2 to obtain a first straight groove;
s4, loosening the blade body pressing mechanism in the step S2, transferring and erecting the bottom mounting surface of the blade on the second bracket, and abutting against the other side surface of the bottom mounting surface of the blade through a second positioning pin of the second positioning seat;
s5, pressing the blade body of the blade in the step S4 again through the blade body pressing mechanism to enable the blade to be located at a second processing position;
s6, vertically grinding the top large-radius arc mounting surface of the blade by using a grinding wheel at a second machining position of the step S5 to obtain a second straight groove.
The invention has the beneficial effects that: according to the invention, the part to be machined of the first machining position and the part to be machined of the second machining position are both positioned on the horizontal plane and are vertically oriented, the grinding operation by using the grinding wheel is convenient, and the quality and the efficiency of the straight groove on the large-radius arc of the blade can be effectively improved.
Further, in step S3 and step S6, the vertical grinding employs multi-stage grinding.
The beneficial effect of adopting the further scheme is that: the stability of processing can be strengthened through the segmentation grinding, guarantees straight flute processingquality.
Further, the multi-section grinding comprises a first grinding, a second grinding and a third grinding, wherein the grinding depth of the first grinding is 2-6mm, the grinding depth of the second grinding is 2-6mm, and the grinding depth of the second grinding is 0.1-0.5 mm.
The beneficial effect of adopting the further scheme is that: and the grinding progress can be conveniently adjusted through three times of grinding.
Further, the grinding speed of the multi-section grinding is 25-50 m/s; the feeding speed of the multi-stage grinding is 400-600 mm/min.
The beneficial effect of adopting the further scheme is that: the burr can be further reduced by controlling the grinding speed, and the straight groove processing quality is improved.
Drawings
FIG. 1 is a schematic front view of a processing apparatus according to the present invention;
FIG. 2 is a schematic front view of a blade of the present invention in a first processing position;
FIG. 3 is a left side view of the blade of the present invention in a first processing position;
FIG. 4 is a schematic front view of a blade of the present invention in a second processing position;
FIG. 5 is a schematic structural view of a grinding wheel for vertically grinding a large-radius arc mounting surface at the top of a blade according to the present invention;
FIG. 6 is a schematic structural diagram of a blade body pressing mechanism according to the present invention;
FIG. 7 is a schematic structural view of a straight groove after machining according to the present invention;
FIG. 8 is a schematic structural view of an angle between a length centerline of a first locating pin and a length centerline of a second locating pin according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
2. a base; 4. a vertical mounting plate; 6. a first positioning seat; 8. a first positioning pin; 10. a second positioning seat; 12. a second positioning pin; 14. a first bracket; 16. a second bracket; 18. a blade body pressing mechanism; 20. a pressing fixed seat; 22. a rotating shaft; 24. a hold down bar; 26. a column; 28. a cushioning decompression member; 30. a suspension seat; 32. a suspension shaft; 80. a blade; 82. a bottom mounting surface; 84. a top large-radius arc mounting surface; 86. a leaf body; 100. a grinding wheel; 106. a first straight groove; 108. a second straight groove.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
In addition, the blades related to the invention are all commercially available turbine blades, each blade comprises a blade body, a large-radius arc mounting head is fixedly arranged at the top of each blade body, a small-radius mounting head is fixedly arranged at the bottom of each blade body, and the top large-radius arc mounting surface refers to the surface of the large-radius arc mounting head; the bottom mounting surface is the surface of the small-radius mounting head. The large-radius arc and the small-radius arc in the large-radius arc mounting head and the small-radius arc mounting head are only relative concepts of a conventional blade mounting head, and the invention can also be applied if the large-radius arc and the small-radius arc are equal in practice.
The invention is further illustrated with reference to the accompanying figures 1 to 8:
in a first mode
This mode provides a turbine blade major radius arc symmetry straight flute processingequipment, combines fig. 1 to 8, and it includes: the blade body pressing mechanism comprises a base 2, a vertical mounting plate 4, a first positioning seat 6, a second positioning seat 10, a first bracket 14, a second bracket 16, a blade body pressing mechanism 18 and a suspension seat 30, wherein,
the vertical mounting plate 4 is fixedly arranged above the base 2, and the side surface of the vertical mounting plate 4 is provided with a blade positioning area, a blade body placing area and a blade processing area which are distributed from bottom to top;
the first positioning seat 6 and the second positioning seat 10 are horizontally arranged in the blade positioning area at intervals, a first positioning pin 8 is arranged at the top of the first positioning seat 6, a second positioning pin 12 is arranged at the top of the second positioning seat 10, the first positioning pin 8 and the second positioning pin 12 both extend towards the top of the vertical mounting plate 4, and the included angle between the length center line of the first positioning pin 8 and the length center line of the second positioning pin 12 is 10 degrees;
the first bracket 14 and the second bracket 16 are horizontally arranged in the blade positioning area at intervals, the first bracket 14 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the first bracket 14 to the first positioning seat 6 is smaller than the distance from the first bracket 14 to the second positioning seat 10; the second bracket 16 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the second bracket 16 to the first positioning seat 6 is greater than the distance from the second bracket 16 to the second positioning seat 10;
the length center line direction of the first bracket 14 is perpendicular to the length center line direction of the first positioning pin 8, and the length center line direction of the second bracket 16 is perpendicular to the length center line direction of the second positioning pin 12;
the blade body pressing mechanism 18 is fixedly installed in the blade body placing area, and the suspension seat 30 is fixedly installed in the blade machining area.
This mode can be solved present milling machine and process out the symmetry straight flute burr through the cutter many, the size precision is not high, is difficult to satisfy the technical problem of the demand of aeroengine blade 80 processing.
According to the method, through the matching of the first positioning seat 6, the second positioning seat 10, the first bracket 14 and the second bracket 16, particularly through limiting the included angle between the length center line of the first positioning pin 8 and the length center line of the second positioning pin 12, the two straight grooves are always positioned on the horizontal plane at the respective processing positions, so that two mutually symmetrical straight grooves can be simultaneously processed on the large-radius arc of the blade 80 by only one blade pressing mechanism 18, the operation is convenient, and the processing efficiency of the blade 80 is improved; the symmetrical straight groove processing device on the large-radius arc of the blade 80 avoids the arrangement of a plurality of blade body pressing mechanisms 18 for processing the straight groove, saves the cost and realizes more application possibilities of the two-axis machine tool; the position to be processed of the large-radius arc of the blade 80 is accurately positioned, and a foundation is laid for the grinding wheel 100 to vertically grind, improve the processing quality of the straight groove and achieve the purpose of improving the processing quality of the straight groove.
Mode two
This mode provides a turbine blade major radius arc symmetry straight flute processingequipment, combines fig. 1 to 8, and it includes: the blade body pressing mechanism comprises a base 2, a vertical mounting plate 4, a first positioning seat 6, a second positioning seat 10, a first bracket 14, a second bracket 16, a blade body pressing mechanism 18 and a suspension seat 30, wherein,
the vertical mounting plate 4 is fixedly arranged above the base 2, and the side surface of the vertical mounting plate 4 is provided with a blade positioning area, a blade body placing area and a blade processing area which are distributed from bottom to top;
the first positioning seat 6 and the second positioning seat 10 are horizontally arranged in the blade positioning area at intervals, a first positioning pin 8 is arranged at the top of the first positioning seat 6, a second positioning pin 12 is arranged at the top of the second positioning seat 10, the first positioning pin 8 and the second positioning pin 12 both extend towards the top of the vertical mounting plate 4, and an included angle between a length center line of the first positioning pin 8 and a length center line of the second positioning pin 12 is 12 degrees;
the first bracket 14 and the second bracket 16 are horizontally arranged in the blade positioning area at intervals, the first bracket 14 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the first bracket 14 to the first positioning seat 6 is smaller than the distance from the first bracket 14 to the second positioning seat 10; the second bracket 16 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the second bracket 16 to the first positioning seat 6 is greater than the distance from the second bracket 16 to the second positioning seat 10;
the length center line direction of the first bracket 14 is perpendicular to the length center line direction of the first positioning pin 8, and the length center line direction of the second bracket 16 is perpendicular to the length center line direction of the second positioning pin 12;
the blade body pressing mechanism 18 is fixedly installed in the blade body placing area, the blade body pressing mechanism 18 comprises a pressing fixing seat 20, a rotating shaft 22, a pressing rod 24 and an upright post 26, the pressing fixing seat 20 and the upright post 26 are horizontally arranged on the blade body placing area at intervals, one end of the pressing rod 24 is hinged to the pressing fixing seat 20 through the rotating shaft 22, and the other end of the pressing rod 24 is detachably connected with the upright post 26 through a bolt;
the suspension mount 30 is fixedly mounted to the blade machining area.
In this way, the movement of the blade body 86 can be restricted by the pressing rod 24, and the stability in processing the straight groove is improved.
The invention also provides a processing method using the device for processing the symmetrical straight groove on the large-radius arc of the turbine blade, which comprises the following steps:
s1, erecting a bottom mounting surface 82 of a blade 80 on a first bracket 14, and propping against one side surface of the bottom mounting surface 82 of the blade 80 through a first positioning pin 8 of a first positioning seat 6;
s2, hanging the top large-radius arc mounting surface 84 of the blade 80 in the step S1 on the hanging seat 30, and then pressing the blade body 86 of the blade 80 through the blade body pressing mechanism 18 to enable the blade 80 to be located at a first processing position;
s3, vertically grinding the top large-radius arc mounting surface 84 of the blade 80 by using a grinding wheel 100 at the first processing position of the step S2 to obtain a first straight groove 106;
s4, loosening the blade body pressing mechanism 18 in the step S2, transferring and erecting the bottom mounting surface 82 of the blade 80 on the second bracket 16, and abutting against the other side surface of the bottom mounting surface 82 of the blade 80 through the second positioning pin 12 of the second positioning seat 10;
s5, the blade body 86 of the blade 80 in the step S4 is compressed again through the blade body compressing mechanism 18, so that the blade 80 is located at a second processing position;
s6, vertically grinding the top large-radius arc mounting surface 84 of the blade 80 by using a grinding wheel 100 at a second machining position of the step S5 to obtain a second straight groove 108;
wherein, in step S3 and step S6, the vertical grinding adopts multi-stage grinding; the multi-section grinding comprises a first grinding, a second grinding and a third grinding, wherein the grinding depth of the first grinding is 2mm, the grinding depth of the second grinding is 2mm, and the grinding depth of the second grinding is 0.5 mm; the grinding speed of the multi-section grinding is 50 m/s; the feeding speed of the multi-section grinding is 400 mm/min.
The part of waiting to process of the first station of this mode and the part of waiting to process of second station all are located the horizontal plane and move towards vertically, use emery wheel 100 grinding convenient operation, can effectively promote straight flute quality and efficiency on the blade 80 major radius arc.
Mode III
This mode provides a turbine blade major radius arc symmetry straight flute processingequipment, combines fig. 1 to 8, and it includes: the blade body pressing mechanism comprises a base 2, a vertical mounting plate 4, a first positioning seat 6, a second positioning seat 10, a first bracket 14, a second bracket 16, a blade body pressing mechanism 18 and a suspension seat 30, wherein,
the vertical mounting plate 4 is fixedly arranged above the base 2, and the side surface of the vertical mounting plate 4 is provided with a blade positioning area, a blade body placing area and a blade processing area which are distributed from bottom to top;
the first positioning seat 6 and the second positioning seat 10 are horizontally arranged in the blade positioning area at intervals, a first positioning pin 8 is arranged at the top of the first positioning seat 6, a second positioning pin 12 is arranged at the top of the second positioning seat 10, the first positioning pin 8 and the second positioning pin 12 both extend towards the top of the vertical mounting plate 4, and an included angle between a length center line of the first positioning pin 8 and a length center line of the second positioning pin 12 is 14 degrees;
the first bracket 14 and the second bracket 16 are horizontally arranged in the blade positioning area at intervals, the first bracket 14 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the first bracket 14 to the first positioning seat 6 is smaller than the distance from the first bracket 14 to the second positioning seat 10; the second bracket 16 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the second bracket 16 to the first positioning seat 6 is greater than the distance from the second bracket 16 to the second positioning seat 10;
the length center line direction of the first bracket 14 is perpendicular to the length center line direction of the first positioning pin 8, and the length center line direction of the second bracket 16 is perpendicular to the length center line direction of the second positioning pin 12;
the blade body pressing mechanism 18 is fixedly installed in the blade body placing area, the blade body pressing mechanism 18 comprises a pressing fixing seat 20, a rotating shaft 22, a pressing rod 24 and an upright post 26, the pressing fixing seat 20 and the upright post 26 are horizontally arranged on the blade body placing area at intervals, one end of the pressing rod 24 is hinged with the pressing fixing seat 20 through the rotating shaft 22, and the other end of the pressing rod 24 is detachably connected with the upright post 26 through a bolt;
the suspension seat 30 is fixedly arranged in the blade processing area, a suspension shaft 32 extends out of the side surface of the suspension seat 30, and the length center line of the suspension shaft 32 is perpendicular to the side surface of the vertical mounting plate 4.
In this way, the movement of the blade body 86 can be limited by the pressing rod 24, and the stability in processing the straight groove is improved; the suspension shaft 32 can provide a support part for the top large-radius arc mounting surface 84 of the blade 80, so that the top large-radius arc mounting surface 84 of the blade 80 can be hung on the suspension seat 30.
The invention also provides a processing method using the device for processing the symmetrical straight groove on the large-radius arc of the turbine blade, which comprises the following steps:
s1, erecting a bottom mounting surface 82 of a blade 80 on a first bracket 14, and propping against one side surface of the bottom mounting surface 82 of the blade 80 through a first positioning pin 8 of a first positioning seat 6;
s2, hanging the top large-radius arc mounting surface 84 of the blade 80 in the step S1 on the hanging seat 30, and then pressing the blade body 86 of the blade 80 through the blade body pressing mechanism 18 to enable the blade 80 to be located at a first processing position;
s3, vertically grinding the top large-radius arc mounting surface 84 of the blade 80 by using a grinding wheel 100 at the first processing position of the step S2 to obtain a first straight groove 106;
s4, loosening the blade body pressing mechanism 18 in the step S2, transferring and erecting the bottom mounting surface 82 of the blade 80 on the second bracket 16, and abutting against the other side surface of the bottom mounting surface 82 of the blade 80 through the second positioning pin 12 of the second positioning seat 10;
s5, the blade body 86 of the blade 80 in the step S4 is compressed again through the blade body compressing mechanism 18, so that the blade 80 is located at a second processing position;
s6, vertically grinding the top large-radius arc mounting surface 84 of the blade 80 by using a grinding wheel 100 at a second machining position of the step S5 to obtain a second straight groove 108;
wherein, in step S3 and step S6, the vertical grinding adopts multi-stage grinding; the multi-section grinding comprises a first grinding, a second grinding and a third grinding, wherein the grinding depth of the first grinding is 6mm, the grinding depth of the second grinding is 6mm, and the grinding depth of the second grinding is 0.1 mm; the grinding speed of the multi-section grinding is 25 m/s; the feeding speed of the multi-stage grinding is 580 mm/min.
Mode IV
This mode provides a turbine blade major radius arc symmetry straight flute processingequipment, combines fig. 1 to 8, and it includes: the blade body pressing mechanism comprises a base 2, a vertical mounting plate 4, a first positioning seat 6, a second positioning seat 10, a first bracket 14, a second bracket 16, a blade body pressing mechanism 18 and a suspension seat 30, wherein,
the vertical mounting plate 4 is fixedly arranged above the base 2, and the side surface of the vertical mounting plate 4 is provided with a blade positioning area, a blade body placing area and a blade processing area which are distributed from bottom to top;
the first positioning seat 6 and the second positioning seat 10 are horizontally arranged in the blade positioning area at intervals, a first positioning pin 8 is arranged at the top of the first positioning seat 6, a second positioning pin 12 is arranged at the top of the second positioning seat 10, the first positioning pin 8 and the second positioning pin 12 both extend towards the top of the vertical mounting plate 4, and the included angle between the length center line of the first positioning pin 8 and the length center line of the second positioning pin 12 is 11 degrees and 26 degrees;
the first bracket 14 and the second bracket 16 are horizontally arranged in the blade positioning area at intervals, the first bracket 14 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the first bracket 14 to the first positioning seat 6 is smaller than the distance from the first bracket 14 to the second positioning seat 10; the second bracket 16 is located between the first positioning seat 6 and the second positioning seat 10, and the distance from the second bracket 16 to the first positioning seat 6 is greater than the distance from the second bracket 16 to the second positioning seat 10;
the length center line direction of the first bracket 14 is perpendicular to the length center line direction of the first positioning pin 8, and the length center line direction of the second bracket 16 is perpendicular to the length center line direction of the second positioning pin 12;
the blade body pressing mechanism 18 is fixedly installed in the blade body placing area, the blade body pressing mechanism 18 comprises a pressing fixing seat 20, a rotating shaft 22, a pressing rod 24 and an upright post 26, the pressing fixing seat 20 and the upright post 26 are horizontally arranged on the blade body placing area at intervals, one end of the pressing rod 24 is hinged with the pressing fixing seat 20 through the rotating shaft 22, and the other end of the pressing rod 24 is detachably connected with the upright post 26 through a bolt;
the suspension seat 30 is fixedly arranged in the blade processing area, a suspension shaft 32 extends out of the side surface of the suspension seat 30, and the length center line of the suspension shaft 32 is perpendicular to the side surface of the vertical mounting plate 4;
wherein, the side of the pressing rod 24 facing the side of the vertical mounting plate 4 is also fixedly provided with an aluminum block.
In this way, the pressure of the hold-down bar 24 on the blade body 86 can be relieved by the cushion relief 28, and damage to the blade body 86 is avoided.
The invention also provides a processing method using the device for processing the symmetrical straight groove on the large-radius arc of the turbine blade, which comprises the following steps:
s1, erecting a bottom mounting surface 82 of a blade 80 on a first bracket 14, and propping against one side surface of the bottom mounting surface 82 of the blade 80 through a first positioning pin 8 of a first positioning seat 6;
s2, hanging the top large-radius arc mounting surface 84 of the blade 80 in the step S1 on the hanging seat 30, and then pressing the blade body 86 of the blade 80 through the blade body pressing mechanism 18 to enable the blade 80 to be located at a first processing position;
s3, vertically grinding the top large-radius arc mounting surface 84 of the blade 80 by using a grinding wheel 100 at the first processing position of the step S2 to obtain a first straight groove 106;
s4, loosening the blade body pressing mechanism 18 in the step S2, transferring and erecting the bottom mounting surface 82 of the blade 80 on the second bracket 16, and abutting against the other side surface of the bottom mounting surface 82 of the blade 80 through the second positioning pin 12 of the second positioning seat 10;
s5, the blade body 86 of the blade 80 in the step S4 is compressed again through the blade body compressing mechanism 18, so that the blade 80 is located at a second processing position;
s6, vertically grinding the top large-radius arc mounting surface 84 of the blade 80 by using a grinding wheel 100 at a second machining position of the step S5 to obtain a second straight groove 108;
wherein, in step S3 and step S6, the vertical grinding adopts multi-stage grinding; the multi-section grinding comprises a first grinding, a second grinding and a third grinding, wherein the grinding depth of the first grinding is 4mm, the grinding depth of the second grinding is 4mm, and the grinding depth of the second grinding is 0.2 mm; the grinding speed of the multi-section grinding is 35 m/s; the feeding speed of the multi-section grinding is 500 mm/min.
The following test was conducted by using the device and method for machining the symmetrical straight grooves on the large-radius arc of the blade 80 in the first to fourth modes
| Qualified | Fail to be qualified | Percent pass (%) | |
| In a first mode | 89 | 11 | 89% |
| Mode two | 93 | 7 | 93% |
| Mode III | 92 | 8 | 92% |
| Mode IV | 94 | 6 | 94% |
Note: qualified means that the groove surface of the processed double straight grooves is smooth, and the diameter and the depth of the straight groove meet the requirements.
To summarize: according to the invention, through the matching of the first positioning seat 6, the second positioning seat 10, the first bracket 14 and the second bracket 16, two mutually symmetrical straight grooves can be simultaneously processed on the large-radius arc of the blade 80 by only one blade pressing mechanism 18, the operation is convenient, the qualification rate of the straight grooves can reach 89-94%, and the processing quality is stable.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a symmetrical straight flute processingequipment on turbine blade major radius arc which characterized in that, it includes: a base (2), a vertical mounting plate (4), a first positioning seat (6), a second positioning seat (10), a first bracket (14), a second bracket (16), a blade body pressing mechanism (18) and a suspension seat (30), wherein,
the vertical mounting plate (4) is fixedly arranged above the base (2), and the side surface of the vertical mounting plate (4) is provided with a blade positioning area, a blade body placing area and a blade processing area which are distributed from bottom to top;
the first positioning seat (6) and the second positioning seat (10) are horizontally arranged in the blade positioning area at intervals, a first positioning pin (8) is arranged at the top of the first positioning seat (6), a second positioning pin (12) is arranged at the top of the second positioning seat (10), the first positioning pin (8) and the second positioning pin (12) both extend towards the top of the vertical mounting plate (4), and an included angle between a length center line of the first positioning pin (8) and a length center line of the second positioning pin (12) is X;
the X is 10-15 degrees;
the first bracket (14) and the second bracket (16) are horizontally arranged in the blade positioning area at intervals, the first bracket (14) is positioned between the first positioning seat (6) and the second positioning seat (10), and the distance from the first bracket (14) to the first positioning seat (6) is smaller than the distance from the first bracket (14) to the second positioning seat (10); the second bracket (16) is positioned between the first positioning seat (6) and the second positioning seat (10), and the distance from the second bracket (16) to the first positioning seat (6) is greater than the distance from the second bracket (16) to the second positioning seat (10);
the length center line direction of the first bracket (14) is perpendicular to the length center line direction of the first positioning pin (8), and the length center line direction of the second bracket (16) is perpendicular to the length center line direction of the second positioning pin (12);
the blade body pressing mechanism (18) is fixedly arranged in the blade body placing area, and the suspension seat (30) is fixedly arranged in the blade machining area.
2. The turbine blade large-radius arc symmetrical straight groove machining device according to claim 1, wherein the blade body pressing mechanism (18) comprises a pressing fixing seat (20), a rotating shaft (22), a pressing rod (24) and an upright column (26), the pressing fixing seat (20) and the upright column (26) are horizontally arranged on the blade body placing area at intervals, one end of the pressing rod (24) is hinged to the pressing fixing seat (20) through the rotating shaft (22), and the other end of the pressing rod (24) is detachably connected with the upright column (26) through a bolt.
3. The turbine blade large-radius arc symmetrical straight groove machining device according to claim 2, characterized in that a buffer pressure reducing piece (28) is fixedly arranged on one side of the pressing rod (24) facing the side face of the vertical mounting plate (4).
4. The turbine blade large radius arc symmetric straight groove machining device according to claim 3, wherein the buffer pressure reducing piece (28) is an aluminum block or a copper block.
5. The turbine blade large-radius arc symmetrical straight groove machining device according to claim 1, wherein a hanging shaft (32) extends out of the side face of the hanging seat (30), and the length center line of the hanging shaft (32) is perpendicular to the side face of the vertical mounting plate (4).
6. A method of machining using the apparatus for machining symmetrical straight grooves on large radius arcs of turbine blades of claim 1, comprising the steps of:
s1, erecting a bottom mounting surface (82) of a blade (80) on a first bracket (14), and propping against one side surface of the bottom mounting surface (82) of the blade (80) through a first positioning pin (8) of a first positioning seat (6);
s2, hanging the top large-radius arc mounting surface (84) of the blade (80) in the step S1 on the hanging seat (30), and then pressing the blade body (86) of the blade (80) through the blade body pressing mechanism (18) to enable the blade (80) to be located at a first processing position;
s3, on the first machining position of the step S2, vertically grinding the top large-radius arc installation surface (84) of the blade (80) by using a grinding wheel (100) to obtain a first straight groove (106);
s4, loosening the blade body pressing mechanism (18) in the step S2, transferring and erecting the bottom mounting surface (82) of the blade (80) on the second bracket (16), and propping against the other side surface of the bottom mounting surface (82) of the blade (80) through a second positioning pin (12) of the second positioning seat (10);
s5, the blade body (86) of the blade (80) in the step S4 is compressed again through the blade body compressing mechanism (18), so that the blade (80) is located at a second processing position;
s6, in the second machining position of the step S5, vertically grinding the top large-radius arc installation surface (84) of the blade (80) by using a grinding wheel (100) to obtain a second straight groove (108).
7. The machining method according to claim 6, wherein the vertical grinding is performed in a plurality of stages in both of step S3 and step S6.
8. The processing method according to claim 7, wherein the multi-stage grinding includes a first grinding, a second grinding and a third grinding, the first grinding having a grinding depth of 2 to 6mm, the second grinding having a grinding depth of 2 to 6mm, and the second grinding having a grinding depth of 0.1 to 0.5 mm.
9. The processing method according to claim 7, wherein the grinding speeds of the multi-stage grinding are 25-50 m/s; the feeding speed of the multi-stage grinding is 400-600 mm/min.
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| US7168899B2 (en) * | 2004-04-22 | 2007-01-30 | General Electric Company | Apparatus and method for centering a workpiece on a machine tool |
| JP2007313595A (en) * | 2006-05-25 | 2007-12-06 | Mitsubishi Heavy Ind Ltd | Positioning pin, and component machining fixture having the same |
| WO2014197044A2 (en) * | 2013-03-12 | 2014-12-11 | United Technologies Corporation | Vane tip machining fixture assembly |
| CN103878608B (en) * | 2014-01-30 | 2017-02-15 | 无锡透平叶片有限公司 | Clamp used for processing aviation thin-wall blade pitch |
| CN104384872A (en) * | 2014-09-11 | 2015-03-04 | 重庆Abb江津涡轮增压系统有限公司 | Machining method of turbine blade |
| CN208584383U (en) * | 2018-05-18 | 2019-03-08 | 成都和鸿科技有限公司 | A kind of gear grinding clamp of turbo blade |
| CN109176238A (en) * | 2018-09-05 | 2019-01-11 | 中国航发动力股份有限公司 | A kind of moving turbine blade jam plate slot grinding location device and processing method |
| CN209386932U (en) * | 2019-03-12 | 2019-09-13 | 岳阳大陆激光技术有限公司 | A kind of fan blade measuring device |
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