CN108747232B - Automatic machining method for precisely forged stator blade - Google Patents

Automatic machining method for precisely forged stator blade Download PDF

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Publication number
CN108747232B
CN108747232B CN201810541951.8A CN201810541951A CN108747232B CN 108747232 B CN108747232 B CN 108747232B CN 201810541951 A CN201810541951 A CN 201810541951A CN 108747232 B CN108747232 B CN 108747232B
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edge
blade
edge plate
plate
milling
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CN108747232A (en
Inventor
蓝仁浩
李飞
刘金凤
张义德
蒲海龙
郭海
张静怡
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AECC Aviation Power Co Ltd
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AECC Aviation Power Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/02Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C3/00Milling particular work; Special milling operations; Machines therefor
    • B23C3/16Working surfaces curved in two directions
    • B23C3/18Working surfaces curved in two directions for shaping screw-propellers, turbine blades, or impellers

Abstract

The invention discloses an automatic processing method of a precision forging stator blade, which adopts a self-adaptive processing technology to ensure the deviation, torsion, profile contour degree and processing consistency of the blade; the method has simple processing flow, adopts computer control management, completely and automatically completes sequential operation of each controlled device, improves the automation operation degree, shortens the processing of the original stator blade by multiple devices, multiple processes, multiple clamping and multiple benchmark conversion into the processing of two processes on one device, clamps twice and converts the benchmark once, saves labor force, shortens the production period of parts and improves the production efficiency.

Description

Automatic machining method for precisely forged stator blade
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of machining of blades of aero-engines, and particularly relates to an automatic machining method for a precision forging stator blade.
[ background of the invention ]
At the present stage, the processing technology of the stator blade mainly adopts die forging blanks, and the main technological process is as follows: (1) milling a leaf basin, a long side face of a back side edge plate and a process boss face; (2) grinding the leaf basin, the long side surface of the back side edge plate and the technological boss surface; (3) milling the end heads of the side edge plates of the row and the air inlet side; (4) milling the bottom surface of the flange plate and the end surface of the process boss; (5) milling the end faces of the lower edge plates on the side of the air inlet and the air outlet; (6) numerical control milling of a blade basin, a back-side blade body, a lower edge plate profile and upper and lower edge plate switching R; (7) grinding the long side surfaces of the leaf basin and the back side edge plate; (8) milling the end heads of the edge plates on the gas inlet side and the gas outlet side; (9) grinding the end heads of the lower edge plates on the side of the air inlet and the air outlet; (10) an upper mounting plate is milled in a numerical control mode; (11) milling a lower mounting plate in a numerical control manner; (12) milling an acute angle switching R of the air inlet side and the air outlet side of the edge plate; (13) milling an obtuse angle switching R of the air inlet side and the air outlet side of the edge plate; (14) numerically controlling and milling blade bodies, lower edge plate profiles, air inlet and outlet edges and upper and lower edge plate switching R; (15) finely polishing the profile of the blade body, air inlet and outlet edges and switching R; (16) cutting the top end of the lower edge plate in a linear mode; (17) profiling milling an external conical surface at the top end of the lower edge plate; (18) and throwing the inner side of the lower edge plate.
The traditional machining method needs to change a machine tool for many times and convert a process reference surface to machine the blade profile, and has the advantages of complex process, low machining efficiency and low blade profile contour percent.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provides an automatic processing method of a precision forging stator blade of an aeroengine; by adopting computer control management, each controlled device completely and automatically completes sequential operation, thereby improving the degree of automation, saving labor force, shortening the production period of parts and improving production efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a blank blade of a precision forging stator blade comprises a blade body; the blade body comprises a blade basin and a blade back on the back of the blade basin; one side of the blade body is an exhaust side, and the other side of the blade body is an air inlet side; one end of the blade body is fixedly connected with an upper edge plate, and the other end of the blade body is fixedly connected with a lower edge plate; the outer side of the upper edge plate is provided with a technical upper lug boss, and the outer side of the lower edge plate is provided with a technical lower lug boss; the connection parts of the blade body and the upper edge plate and the lower edge plate are provided with transfer cambered surfaces; the inner side surface of the upper edge plate is provided with a V point which is an axial reference of the blade body.
The invention is further improved in that:
the upper edge plate, the lower edge plate, the exhaust edge and the air inlet edge of the blank blade are all provided with single-edge allowance; the single margin of the upper edge plate is 2-4mm, the single margin of the lower edge plate is 3-5mm, and the margins of the exhaust edge and the air inlet edge are both 2-4 mm.
The V point is on the center line of the upper flange plate.
An automatic machining method for a precision forging stator blade by adopting a blank blade comprises the following steps:
1) first working procedure for processing blank blade
1-1) clamping blank blades; roughly milling two side end faces of the upper edge plate, two side end faces of the lower edge plate, an air inlet edge and an air exhaust edge;
1-2) finish milling the inner side surfaces of the upper and lower edge plates, four transfer arc surfaces of the blade body, an air inlet edge and an air outlet edge, and performing self-adaptive detection on a machined surface before finish milling;
1-3) milling reference surfaces on two side end surfaces of an upper edge plate and two side end surfaces of a lower edge plate along the axial direction of the blade body; the protruding surfaces on the two sides of each reference surface are step surfaces; processing a semi-finished blade;
2) second working procedure for processing semi-finished blade
2-1) clamping semi-finished product blades, calling a measuring head measuring reference surface, and milling off an upper process boss and a lower process boss; finely milling the side end face of the basin side, the side end face of the back side and the outer side face of the blade of the upper edge plate; the side end face of the blade basin, the side end face of the blade back and the outer side face of the lower edge plate;
2-2) calling a measuring head to measure two side end faces of the upper edge plate, and superfinishing a blade basin side end face, a blade back side end face and an outer side face of the upper edge plate; the side end face of the blade basin, the side end face of the blade back and the outer side face of the lower edge plate;
2-3) calling a measuring head to measure, and then performing ultra-finish milling on step surfaces on two sides of the upper edge plate and the lower edge plate;
2-4) rounding the edges between the end surfaces.
The fixture in the step 1-1) clamps the upper boss of the process, the lower boss of the process, two points of the side end face of the upper edge plate blade basin and two points of the back side end face of the upper edge plate blade.
In the step 1-1), before rough milling, a measuring head is used for detecting rough milling allowances of two side end faces of the upper edge plate, two side end faces of the lower edge plate, an air inlet edge and an air outlet edge.
In the step 1-3), the step surface protrudes 0.01-0.03mm relative to the reference surface.
In the step 2-1), the fixture clamps four points, a V point, an air inlet edge and an air outlet edge of the blade body.
The rounding radius of the rounding process is: 0.8-1 mm.
The adaptive detection is to detect the remaining amount of the surface to be processed by using a probe, and the position of the surface to be processed with respect to a processing coordinate system.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a blank blade of a precision forging stator blade, wherein a process upper lug boss and a process lower lug boss are respectively fixed on an upper edge plate and a lower edge plate at two ends of a blade body, so that the blade is conveniently clamped in the blank blade; the blank blade processed by the stator blade precisely forged by the invention is only provided with the allowance at the upper and lower edge plates and the exhaust edge and the air inlet edge of the blade body, the blank piece is processed into the precisely forged blank, the milling process of the profile of the blade body is eliminated, the process is simplified, and the processed blade has good formability;
furthermore, the axial reference of the blade passes through the center line of the upper edge plate, so that the high processing precision of the blade is ensured when the edge of the blade is processed.
The invention discloses an automatic processing method of a precision forging stator blade, which adopts a self-adaptive processing technology to ensure the deviation, torsion, profile contour degree and processing consistency of the blade; the method has simple processing flow, adopts computer control management, completely and automatically completes sequential operation of each controlled device, improves the automation operation degree, shortens the processing of the original stator blade by multiple devices, multiple processes, multiple clamping and multiple benchmark conversion into the processing of two processes on one device, clamps twice and converts the benchmark once, saves labor force, shortens the production period of parts and improves the production efficiency.
Furthermore, the clamping position is determined according to the machined surface in the first process, so that the traveling path of the cutter is free from obstruction in the machining process of the first process, and the stability of the blade is good in the machining process.
Furthermore, before rough milling, a measuring head is used for detecting the allowance of the processed surface, so that the processing precision is improved.
Furthermore, the protruding amount of the step surface relative to the reference surface is limited, so that the reference surface machined in the first working procedure is high in precision, and the semi-finished blade is good in size consistency.
Furthermore, the clamping position facing the second clamp to be machined in the second process is limited, so that the cutter path of the cutter is free from blocking, and the machined blade is good in stability in the machining process.
Furthermore, the radius of the rounding is limited, and the machined blade is good in consistency and high in precision.
Furthermore, the self-adaptive detection is used for detecting the allowance and the position of the machined surface relative to the machining coordinate system, and all machined surfaces are guaranteed to meet the technological requirements.
[ description of the drawings ]
FIG. 1 is a schematic view of a precision forged stator blank vane construction of the present invention;
FIG. 2 is a schematic structural view of a target precision forging of the present invention;
FIG. 3 is a cross-sectional view of a precision forging A-A of the present invention;
wherein: 1-upper edge plate; 2-leaf body; 3-exhausting edge; 4-air inlet side; 5-a lower edge plate; 6-technological boss mounting; 7-processing a lower boss; 8-V point; 9-transferring the cambered surface; 10-leaf basin; 11-leaf back; 12-a reference plane; 13-step surface.
[ detailed description ] embodiments
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 3, the engine stator blank blade of the invention is a precision forging, and the blank blade comprises an upper edge plate 1, a blade body 2, an exhaust edge 3, an air inlet edge 4, a lower edge plate 5, a process upper boss 6, a process lower boss 7 and a transfer cambered surface 9; the concave surface of the blade body 2 is a blade basin 10, and the convex surface of the blade body 2 is a blade back 11; one side of the blade body 2 is an exhaust edge 3, and the other side is an air inlet edge 4; one end of the blade body 2 is an upper edge plate 1, and the other end is a lower edge plate 5; the outer side surface of the upper edge plate 1 is fixedly connected with a process upper lug boss 6, the outer side of the lower edge plate 5 is fixedly connected with a process lower lug boss 7, and the surfaces of the upper edge plate and the lower edge plate, which are fixed with the blade body 2, are inner side surfaces; the end surface of the upper edge plate 1 at the side of the blade basin 10 is the end surface of the blade basin side of the upper edge plate 1, and the end surface at the side of the blade back 11 is the end surface of the blade back side of the upper edge plate; the end surface of the lower edge plate 5 on the side of the blade basin 10 is the end surface of the blade basin side of the lower edge plate 5, and the end surface of the blade back side of the lower edge plate 5 on the side of the blade back 11 is the end surface of the blade back side of the lower edge plate 5; the center lines of the upper process boss 6 and the lower process boss 7 are on the same straight line; the inner side surface of the upper edge plate 1 is provided with a V point 8 on the central line of the upper edge plate, and the V point is an axial reference of the blade body 2. The blade basin 10 and the blade back 11 of the blank blade are not provided with margins, the upper edge plate 1 is provided with a single-side margin of 2-4mm, the lower edge plate 5 is provided with a margin of 3-5mm, namely, each surface of the upper edge plate 1 and the lower edge plate 5 is provided with a margin; the edge of the exhaust edge 3 and the edge of the air inlet edge 4 are both provided with single-edge allowance of 2-4 mm. The adaptive detection is to detect the remaining amount of the surface to be processed by the probe, and to detect the position of the surface to be processed with respect to the processing coordinate system.
Two machining processes of the stator blade are all machined on a five-axis machining center numerical control milling machine, and the machining steps are as follows:
1) a first step: numerically milling the edges of the air inlet edge 4 and the air outlet edge 3, the upper edge plate 1, the lower edge plate 5, the 4 transfer arc surfaces 9 and a reference surface required by the second process on a machine tool;
1-1) clamping 4 positioning points of a process upper boss 6, a process lower boss 7 and an upper edge plate 1 by using a clamp; two of the 4 positioning points of the upper edge plate 1 are arranged on the side end face of the blade basin, and two positioning points are arranged on the side end face of the blade back;
1-2) the robot transfers the clamp and the blank blade to a machine tool;
1-3) calling a measuring head to detect the quality of the part blank, on one hand, detecting the surface quality of the blank, and preliminarily judging whether the part blank meets the requirements of the machining process; on the other hand, the allowance of two side end faces of the upper edge plate 1 of the part blank, two side end faces of the lower edge plate 5, the edge of the air inlet edge 4 and the edge of the air exhaust edge 3 is measured;
1-4) carrying out numerical control rough milling on two side end faces of an upper edge plate 1, two side end faces of a lower edge plate 5, an edge of an air inlet edge 4 and an edge of an air exhaust edge 3;
1-5) detecting the allowance of the inner side surfaces of the upper and lower edge plates and the four transfer arc surfaces 9 of the blade body and the position of a machined surface relative to a machining coordinate system;
1-6) finely milling the inner side surfaces of the upper and lower edge plates and four transfer arc surfaces 9 of the blade body;
1-7) calling a measuring head to carry out self-adaptive detection on the edge of the air inlet edge 4, and carrying out numerical control finish milling on the edge of the air inlet edge 4;
1-8) calling a measuring head to carry out self-adaptive detection on the edge of the exhaust edge 3, and carrying out numerical control finish milling on the edge of the exhaust edge 3;
1-9) milling reference surfaces 12 on the end surfaces of the two sides of the upper edge plate 1 and the end surfaces of the two sides of the lower edge plate 5 respectively along the axial direction of the blade body 2; the protruding surfaces on the two sides of the reference surface 12 are step surfaces 13; the height of the step surface 13 is 0.01-0.03mm relative to the datum plane 12.
The blade processed in the working procedure is a semi-finished blade;
2) a second step: numerically milling the side end faces and the outer side faces of the leaf basin of the upper edge plate and the lower edge plate, and rounding each edge;
2-2) clamping the semi-finished blade by using a clamp; clamping four positioning points, a V point 8, an air inlet edge 4 and an air outlet edge 3 of the blade body 2; the four positioning points of the leaf basin 10 correspond to the four positioning points of the leaf back 11;
2-2) the robot transmits the clamp and the semi-finished blade to a machine tool;
2-3) calling measuring heads to measure reference surfaces 12 on two side end surfaces of the upper edge plate 1 and reference surfaces 12 on two side end surfaces of the lower edge plate 5;
2-4) milling off a process upper boss 6 and a process lower boss 7;
2-5) finely milling the side end face of the basin side, the side end face of the back side and the outer side face of the blade of the upper edge plate 1; the end surface of the side of the basin, the end surface of the back of the blade and the outer side of the lower edge plate 5;
2-6) calling a measuring head to measure two side end faces of the upper edge plate 1;
2-7) superfinishing the side end face of the basin, the side end face of the back of the blade and the outer side face of the upper edge plate 1; the end surface of the side of the basin, the end surface of the back of the blade and the outer side of the lower edge plate 5;
2-8) calling a measuring head to measure, and then performing ultra-finish milling on step surfaces 13 on two sides of the upper edge plate and the lower edge plate;
2-9) rounding the edges between the end faces of the upper edge plate 1 and the lower edge plate 5 with a rounding radius of 0.8-1 mm.
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 (7)

1. An automatic processing method for a precision forging stator blade adopts a blank blade of the precision forging stator blade, wherein the blank blade comprises a blade body (2); the blade body (2) comprises a blade basin (10) and a blade back (11) on the back of the blade basin (10); one side of the blade body (2) is an exhaust edge (3), and the other side is an air inlet edge (4); one end of the blade body (2) is fixedly connected with an upper edge plate (1), and the other end is fixedly connected with a lower edge plate (5); a process upper lug boss (6) is arranged on the outer side of the upper edge plate (1), and a process lower lug boss (7) is arranged on the outer side of the lower edge plate (5); the connection parts of the blade body (2) and the upper edge plate (1) and the lower edge plate (5) are provided with transfer cambered surfaces (9); the inner side surface of the upper edge plate (1) is provided with a V point (8) which is an axial reference of the blade body (2); the V point (8) is arranged on the central line of the upper edge plate (1); the upper edge plate (1), the lower edge plate (5), the exhaust edge (3) and the air inlet edge (4) of the blank blade are all provided with single-edge allowance; the single-side allowance of the upper edge plate (1) is 2-4mm, the single-side allowance of the lower edge plate (5) is 3-5mm, and the allowances of the edge of the exhaust edge (3) and the edge of the air inlet edge (4) are both 2-4 mm; the processing method is characterized by comprising the following steps:
1) first working procedure for processing blank blade
1-1) clamping blank blades; roughly milling two side end faces of an upper edge plate (1), two side end faces of a lower edge plate (5), an edge of an air inlet edge (4) and an edge of an air exhaust edge (3);
1-2) finely milling the inner side surfaces of the upper and lower edge plates, four transfer arc surfaces (9) of the blade body, the edge of the air inlet edge (4) and the edge of the air exhaust edge (3), and performing self-adaptive detection on the machined surface before fine milling;
1-3) milling reference surfaces (12) on two side end surfaces of the upper edge plate (1) and two side end surfaces of the lower edge plate (5) along the axial direction of the blade body (2) respectively; the protruding surfaces on the two sides of each reference surface (12) are step surfaces (13); processing a semi-finished blade;
2) second working procedure for processing semi-finished blade
2-1) clamping a semi-finished blade, calling a measuring head measuring reference surface (12), and milling off a process upper boss (6) and a process lower boss (7); finely milling the side end face of a blade basin, the side end face of a blade back and the outer side face of the upper edge plate (1); the side end face of the leaf basin side, the side end face of the leaf back side and the outer side face of the lower edge plate (5);
2-2) calling a measuring head to measure two side end faces of the upper edge plate (1), and superfinishing a blade basin side end face, a blade back side end face and an outer side face of the upper edge plate (1); the side end face of the leaf basin side, the side end face of the leaf back side and the outer side face of the lower edge plate (5);
2-3) calling a measuring head to measure, and then performing ultra-finish milling on step surfaces (13) on two sides of the upper edge plate and the lower edge plate;
2-4) rounding the edges between the end surfaces.
2. The automatic processing method of the precision forging stator blade according to claim 1, characterized in that in the step 1-1), the fixture clamps a process upper boss (6), a process lower boss (7), two points of the end surface of the upper edge plate (1) at the blade basin side and two points of the end surface of the upper edge plate (1) at the blade back side.
3. The automatic machining method for the finish-forged stator blade according to claim 1, characterized in that in step 1-1), before rough milling, rough milling allowances of two side end faces of the upper edge plate (1), two side end faces of the lower edge plate (5), an edge of the air inlet edge (4) and an edge of the air outlet edge (3) are detected by using probes.
4. The automatic machining method for the precision forging stator blade as claimed in claim 1, wherein in the step 1-3), the step surface (13) protrudes 0.01-0.03mm relative to the reference surface (12).
5. The automatic machining method for the precision forging stator blade is characterized in that in the step 2-1), the clamp clamps four points of the blade body (2), the V point (8), the air inlet edge (4) and the air outlet edge (3).
6. The automatic machining method for the precision forging stator blade as claimed in claim 1, wherein the rounding radius of the rounding process is as follows: 0.8-1 mm.
7. The automated precision forging stator blade machining method according to any one of claims 1 to 6, wherein the adaptive detection is a detection of a remaining amount of the machined surface, a position of the machined surface with respect to a machining coordinate system, by using a probe.
CN201810541951.8A 2018-05-30 2018-05-30 Automatic machining method for precisely forged stator blade Active CN108747232B (en)

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CN109692990A (en) * 2018-12-17 2019-04-30 中国航发动力股份有限公司 A kind of band damping platform rotor blade processing method
CN109365884A (en) * 2018-12-17 2019-02-22 中国航发动力股份有限公司 A kind of rotor blade tip cutting off processing method and its application
CN110026594B (en) * 2019-04-25 2020-05-22 沈阳透平机械股份有限公司 Machining method of early warning groove of rotor moving blade of turbine axial flow expander
CN110524204A (en) * 2019-08-30 2019-12-03 中国航发动力股份有限公司 A kind of blade processing technique

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CN103240574A (en) * 2013-05-10 2013-08-14 西安航空动力股份有限公司 Processing method of journal guide vane of aero-engine
CN104308481A (en) * 2014-10-27 2015-01-28 西安航空动力股份有限公司 Stator blade machining method of aeroengine compressor without mounting plate
CN105252224A (en) * 2015-11-19 2016-01-20 华中科技大学无锡研究院 Machining method of outer duct outlet guide vane of aero-engine
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CN107790793A (en) * 2017-09-28 2018-03-13 中国航发动力股份有限公司 A kind of aviation finish forge blade self-adapting type milling method
CN107838642A (en) * 2017-12-18 2018-03-27 中国航发贵州黎阳航空动力有限公司 A kind of processing method of bipode thin wall vane part
CN107984179A (en) * 2017-11-22 2018-05-04 中国航发沈阳黎明航空发动机有限责任公司 A kind of quick method for preparing double installing plate blades

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Publication number Priority date Publication date Assignee Title
US3600781A (en) * 1968-03-08 1971-08-24 Rolls Royce Method of producing a stator vane for a gas turbine engine
CN103203490A (en) * 2012-12-31 2013-07-17 四川绵竹鑫坤机械制造有限责任公司 Processing method of five-fork blade-root moving blades with own shrouds
CN103111812A (en) * 2013-03-14 2013-05-22 北重阿尔斯通(北京)电气装备有限公司 Processing method of turbine axial blade
CN103240574A (en) * 2013-05-10 2013-08-14 西安航空动力股份有限公司 Processing method of journal guide vane of aero-engine
CN104308481A (en) * 2014-10-27 2015-01-28 西安航空动力股份有限公司 Stator blade machining method of aeroengine compressor without mounting plate
CN105252224A (en) * 2015-11-19 2016-01-20 华中科技大学无锡研究院 Machining method of outer duct outlet guide vane of aero-engine
CN105834702A (en) * 2016-05-31 2016-08-10 西北工业大学 In-situ synthesis type TiB2 particle-reinforced aluminum matrix composite blade cutting machining method
CN107790793A (en) * 2017-09-28 2018-03-13 中国航发动力股份有限公司 A kind of aviation finish forge blade self-adapting type milling method
CN107984179A (en) * 2017-11-22 2018-05-04 中国航发沈阳黎明航空发动机有限责任公司 A kind of quick method for preparing double installing plate blades
CN107838642A (en) * 2017-12-18 2018-03-27 中国航发贵州黎阳航空动力有限公司 A kind of processing method of bipode thin wall vane part

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