CN114985814B - Machining tool and system for blade body and use method - Google Patents

Machining tool and system for blade body and use method Download PDF

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Publication number
CN114985814B
CN114985814B CN202210753171.6A CN202210753171A CN114985814B CN 114985814 B CN114985814 B CN 114985814B CN 202210753171 A CN202210753171 A CN 202210753171A CN 114985814 B CN114985814 B CN 114985814B
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China
Prior art keywords
blade
blade body
clamping
rod
driving motor
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CN114985814A (en
Inventor
余杰
***
陈海瑛
梁嘉伟
刘秀梅
张丽丽
王辉
吴动波
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AECC Aviation Power Co Ltd
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AECC Aviation Power Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C9/00—Details or accessories so far as specially adapted to milling machines or cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/08—Work-clamping means other than mechanically-actuated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

The invention discloses a processing tool, a processing system and a using method for a blade body, which can improve the processing precision and the surface quality of the blade body, realize the clamping of the blade body and inhibit the processing vibration or deformation of the blade body. The processing frock cooperatees with the digit control machine tool that is used for blade processing, including lead screw drive assembly, auxiliary stay subassembly and friction drive assembly, lead screw drive assembly includes first driving motor, lead screw and slider, friction drive assembly includes second driving motor, drive wheel driving motor and friction drive wheel, auxiliary stay subassembly includes pneumatic cylinder, bracing piece, clamping lever and ring, the ring passes through the support setting to be in the surface of slider, ring one side with friction drive wheel cooperation contact, the inner wall of ring is passed through the pneumatic cylinder and is connected respectively bracing piece and clamping lever, bracing piece and clamping lever set up relatively and are used for centre gripping blade body.

Description

Machining tool and system for blade body and use method
Technical Field
The invention belongs to the technical field of aero-engine blade processing, and particularly relates to a processing tool and system for a blade body of an aero-engine and a using method.
Background
The blade is an important component of the engine, and the processing quality of the blade directly influences the performance of the engine. In the processing process, the blade is required to be clamped and fixed and then processed, and the blade body part of the blade belongs to a thin-wall part with a complex curved surface, so that the blade body cannot be directly clamped, the problems of processing deformation, surface quality reduction and the like caused by weak rigidity are very easy to occur, and the processing quality of the blade is influenced.
In the precise milling process of the blade body of the blade, the traditional processing tool adopted at present only can clamp the tenon and the blade tip of the blade, and as the tenon groove part of the blade is a symmetrical curved surface and is relatively thick, the rigidity of the tenon and the blade tip of the blade can meet the processing requirement, but the profile part of the blade body of the blade is thinner, the problem of insufficient rigidity is easy to generate, vibration is easy to generate under the action of milling force, the deformation of the processing part is large and uncontrollable, and the processing precision and quality are difficult to meet the requirement.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a processing tool, a processing system and a using method for a blade body, which can improve the processing precision and the surface quality of the blade body, realize the clamping of the blade body and inhibit the processing vibration or deformation of the blade body.
The invention is realized by the following technical scheme:
the processing tool for the blade body of the blade is matched with a numerical control machine tool for processing the blade and comprises a screw rod transmission assembly, an auxiliary supporting assembly and a friction transmission assembly,
the screw transmission assembly comprises a first driving motor, a screw and a sliding block, wherein the sliding block is arranged on the bottom surface of the slot, the first driving motor is arranged on the inner walls of the two sides of the slot, and the screw passes through a through hole formed in the sliding block and is connected with the first driving motors on the two sides;
the friction transmission assembly comprises a second driving motor, a transmission wheel driving motor and a friction transmission wheel, wherein the second driving motor is arranged on one side of the sliding block, the output end of the second driving motor is connected with the transmission wheel driving motor, and the output end of the transmission wheel driving motor is connected with the friction transmission wheel;
the auxiliary support assembly comprises a hydraulic cylinder, a support rod, a clamping rod and a circular ring, wherein the circular ring is arranged on the surface of the sliding block through a support, one side of the circular ring is in matched contact with the friction driving wheel, the inner wall of the circular ring is respectively connected with the support rod and the clamping rod through the hydraulic cylinder, and the support rod and the clamping rod are oppositely arranged and used for clamping a blade body.
Preferably, the clamping end of the supporting rod is provided with a rigid clamp head matched with the molded surface of the blade body, and the clamping end of the clamping rod is provided with a flexible clamp head matched with the molded surface of the blade body.
Preferably, the flexible fixture head is made of a high polymer material, and the elastic modulus of the flexible fixture head is smaller than that of the blade material and the rigid fixture head.
Preferably, the output end of the second driving motor is connected with a motor base through a connecting bent rod, and the driving wheel driving motor is arranged in the motor base.
Preferably, the connecting curved rod is an L-shaped rod, the inflection point of the L-shaped rod is connected with the output end of the second driving motor, and the end of the curved rod on one side of the L-shaped rod is connected with the motor base.
A processing system for a blade body comprises the processing tool for the blade body, a blade root tenon clamp and a blade tip clamp;
the blade root tenon clamp is connected with a rotary shaft of the numerical control machine tool, and a groove matched with the blade root tenon is formed in the blade root tenon clamp;
the blade tip clamp is connected with the top of the numerical control machine tool, and the shape of the blade tip clamp is matched with the shape of the blade tip of the blade.
Preferably, the blade root tenon clamp is fixedly connected with the blade root tenon through a set screw.
Preferably, the blade tip clamp is fixedly connected with the blade tip through a set screw.
The application method of the processing tool for the blade body comprises the following steps of:
the ring provided with the supporting rod and the clamping rod is driven to reach the processing tool arrangement area through the screw rod transmission assembly;
and starting a second driving motor to enable the friction driving wheel to be in contact fit with the circular ring, starting the driving wheel to drive the friction driving wheel to rotate, driving the circular ring to rotate through friction force between the friction driving wheel and the circular ring, positioning the supporting rod and the clamping rod to a position matched with the blade body, obtaining rigidity and friction force required by clamping according to finite element analysis on the machining process, adjusting hydraulic pressure of the hydraulic cylinder, adjusting the supporting rod and the clamping rod to clamp the blade body through the hydraulic cylinder, and finishing the arrangement of the machining tool for the blade body.
Preferably, the clamping method for clamping the blade body by the support rod and the clamping rod comprises the following steps:
the supporting rod extends out firstly, and is automatically locked through the hydraulic pressure of the hydraulic cylinder when the supporting rod contacts the blade body, so that the current position of the blade body is kept;
and then the clamping rod stretches out and compresses the blade body under the action of hydraulic pressure of the hydraulic cylinder, so that the blade body is clamped.
Compared with the prior art, the invention has the following beneficial technical effects:
compared with the traditional blade processing tool, the blade processing tool provided by the invention has the advantages that in the blade precise milling process, the auxiliary supporting rods are adopted to contact and clamp the blade body, so that the system rigidity of the blade body, especially the rigidity of the weak part of the blade body, is increased, the vibration and deformation of the blade body in the precise milling process are reduced, and the stability of the whole blade processing process is maintained. The auxiliary support assembly and the friction transmission assembly are linearly moved to the position of the weak blade body rigidity part needing auxiliary support along the screw rod through the sliding block. Then the friction transmission assembly is driven by a motor, the circular ring carrying the adjustable supporting rod rotates through friction transmission of the friction transmission wheel, the supporting rod is positioned at a clamping position matched with the blade body, and the blade body is clamped and positioned in the processing process. And finally, the auxiliary supporting component is driven by hydraulic pressure and contacts with a blade body workpiece through the supporting rod, so that the contact characteristic is changed, the rigidity and the deformation resistance of the blade body are improved, the processing precision and the surface quality of the blade body are improved, and the clamping of the blade body part is realized.
Furthermore, in order to improve the processing quality and processing efficiency of the blade body, the method utilizes a finite element method to calculate the area with weak rigidity of the blade before milling the blade body, so as to determine the layout position of the processing tool during processing. When the thin-wall blade body is precisely milled, the blade root tenon clamp and the blade tip clamp respectively clamp the blade root tenon and the blade tip process boss, a supporting rod in the processing tool is accurately positioned by utilizing a rotatable circular ring, and the blade body is clamped by adjusting the hydraulic cylinder, so that the rigidity of the blade body is improved, and the vibration deformation of a blade body workpiece is effectively reduced. After the positioning and clamping process is finished, the rotary shaft, the blade tenon clamp, the blade tip clamp, the blade workpiece and the circular ring carrying the auxiliary supporting rod of the numerical control machine tool can synchronously rotate, so that rotary milling of the blade body of the blade is smoothly finished, and the blade is ensured to obtain high machining precision and surface quality. The tool system and the use method thereof can be used for precise milling of the blade body of the aero-engine blade, and have the advantages of high efficiency, low cost and strong practicability while realizing precise processing of the height and the quality of the blade body of the aero-engine blade.
Drawings
FIG. 1 is a schematic view of the blade root dovetail clamp of the present invention;
FIG. 2 is a schematic view of a processing tool structure of a blade body of the blade;
FIG. 3 is a schematic view of the installation of the blade body of the present invention during machining;
FIG. 4 is a schematic view of the structure of the tip holder of the present invention.
In the drawing, a blade root tenon clamp 1, a blade tip clamp 2, a first driving motor 3, a screw 4, a sliding block 5, a hydraulic cylinder 6, a supporting rod 701, a clamping rod 702, a circular ring 8, a second driving motor 9, a connecting bent rod 10, a driving wheel driving motor 11, a friction driving wheel 12, a bottom plate 13, a rotating shaft 14, a center 15, a blade root tenon 16, a blade tip process boss 17 and a blade body 18.
Detailed Description
The principles and features of the present invention are described in further detail below with reference to the attached drawings, and the examples are provided for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The invention provides a processing tool for a blade body of a blade, as shown in fig. 2, the processing tool is matched with a numerical control machine tool for processing the blade, and comprises a screw rod transmission assembly, an auxiliary supporting assembly and a friction transmission assembly, wherein a bottom plate 13 of the numerical control machine tool is provided with a slot;
the screw transmission assembly comprises a first driving motor 3, a screw 4 and a sliding block 5, wherein the sliding block 5 is arranged on the bottom surface of the slot, the first driving motor 3 is arranged on the inner walls of the two sides of the slot, and the screw 4 passes through a through hole formed in the sliding block 5 and is connected with the first driving motor 3 on the two sides;
the friction transmission assembly comprises a second driving motor 9, a transmission wheel driving motor 11 and a friction transmission wheel 12, wherein the second driving motor 9 is arranged on one side of the sliding block 5, the output end of the second driving motor 9 is connected with the transmission wheel driving motor 11, and the output end of the transmission wheel driving motor 11 is connected with the friction transmission wheel 12;
the auxiliary support assembly comprises a hydraulic cylinder 6, a support rod 701, a clamping rod 702 and a circular ring 8, wherein the circular ring 8 is arranged on the surface of the sliding block 5 through a support, one side of the circular ring 8 is in matched contact with the friction driving wheel 12, the inner wall of the circular ring 8 is respectively connected with the support rod 701 and the clamping rod 702 through the hydraulic cylinder 6, and the support rod 701 and the clamping rod 702 are oppositely arranged and used for matched clamping of the blade body 18.
Compared with the traditional blade machining tool, the auxiliary supporting rod 701 and the clamping rod 702 are adopted to contact and clamp the blade body in the blade body precise milling process, so that the system rigidity of the blade body, particularly the rigidity of the weak part of the blade body, is increased, the vibration and deformation of the blade body in the precise milling process are reduced, and the stability of the whole blade machining process is maintained. Specifically, a motor-driven screw rod transmission assembly, a hydraulic-driven auxiliary support assembly and a motor-driven friction transmission assembly are mutually matched, the screw rod transmission assembly is assembled on a numerical control machine tool through a bottom plate 13 and driven by a first driving motor 3, and the auxiliary support assembly and the friction transmission assembly assembled on a sliding block 5 linearly move to a position of weak rigidity of a blade body needing auxiliary support along the screw rod through the sliding block 5. Then the friction transmission assembly is driven by a motor, the friction transmission wheel 12 is used for friction transmission to enable the circular ring 8 carrying the adjustable supporting rod 701 and the clamping rod 702 to rotate, the supporting rod 701 and the clamping rod 702 are positioned at the clamping position matched with the blade body, and the clamping and positioning of the blade body in the processing process are realized. Finally, the auxiliary supporting component is driven by hydraulic pressure and is contacted with the blade body workpiece through the supporting rod 701 and the clamping rod 702, so that the contact characteristic is changed, the rigidity and the deformation resistance of the blade body are improved, the processing precision and the surface quality of the blade body are improved, and the clamping of the blade body part is realized.
The friction transmission assembly is assembled on a sliding block 5 of the screw transmission assembly and comprises a motor, a connecting bent rod 10, a motor seat, a transmission wheel driving motor 11 and a friction transmission wheel 12 which are assembled on the sliding block 5.
Further, the supporting rod 701 and the clamping rod 702 are telescopic rods, the supporting rod 701 and the clamping rod 702 are hydraulically driven to be adjusted through the hydraulic cylinder 6 to stretch or move up and down, so that clamping fixation is achieved through matching with the clamping part of the blade body 18, meanwhile, the clamping end of the supporting rod 701 is provided with a rigid clamp head matched with the molded surface of the blade body 18, the clamping end of the clamping rod 702 is provided with a flexible clamp head matched with the molded surface of the blade body 18, the flexible clamp head can be well attached to the molded surface of the blade body 18, damage caused by clamping is avoided, in the clamping process, the flexible clamp head is elastically deformed, the deformation degree of the flexible clamp head can be controlled through controlling the size of hydraulic pressure, and therefore rigidity and friction force after clamping are controlled, and the rigid clamp head can guarantee the clamping force and the clamping stability.
Preferably, the flexible fixture head is made of a high polymer material, and the elastic modulus of the flexible fixture head is smaller than that of the blade material and the rigid fixture head.
Further, the output end of the second driving motor 9 is connected with a motor base through a connecting bent rod 10, the driving wheel driving motor 11 is arranged in the motor base, and the connecting bent rod 10 is convenient to adjust according to the actual clamping position and structure.
Preferably, the connecting bent rod 10 is an L-shaped rod, the inflection point of the L-shaped rod is connected with the output end of the second driving motor 9, and the end of the bent rod on one side of the L-shaped rod is connected with the motor base.
The outer wall of the ring 8 is rotatably connected with the support, the support is fixed on the slide block 5 as a support body of the rotatable ring 8 and is used as a rotating track of the ring 8, and the ring 8 rotates in the support along the rotating track after receiving the friction force transmitted by the friction driving wheel 12, so as to adjust the positions of the positioning support bar 701 and the clamping bar 702.
The invention also provides a processing system for the blade body, which comprises the processing tool for the blade body, the blade root tenon clamp 1 and the blade tip clamp 2;
the blade root tenon clamp 1 is connected with a rotary shaft 14 of the numerical control machine tool, and a groove matched with the blade root tenon 16 is formed in the blade root tenon clamp 1;
the blade tip clamp 2 is connected with the top 15 of the numerical control machine tool, and the shape of the blade tip clamp 2 is matched with the shape of the blade tip.
Preferably, the blade root tenon clamp 1 is fixedly connected with the blade root tenon 16 through a set screw.
Preferably, the blade tip clamp 2 is fixedly connected with the blade tip through a set screw.
The invention also provides a use method of the processing system for the blade body of the blade, when the blade is precisely processed, the method comprises the following steps:
before precisely milling a blade body, analyzing a region of the blade body, which is subjected to vibration or deformation, as a processing tool arrangement region based on a finite element method, and installing the processing tool for the blade body in the processing tool arrangement region;
sliding the blade tenon 16 into a groove on one side of the blade root tenon clamp 1 and fixedly clamping;
the blade tip and the blade tip clamp 2 are matched and fixedly clamped, the clamping of the blade is completed, and the processing and milling of the blade body 18 are started.
The invention also provides a use method of the processing tool for the blade body, and the processing tool for the blade body comprises the following steps:
the ring 8 provided with the supporting rod 701 and the clamping rod 702 is driven to reach a processing tool arrangement area through the screw rod transmission assembly;
the second driving motor 9 is started to enable the friction driving wheel 12 to be in contact fit with the circular ring 8, the driving wheel driving motor 11 is started to enable the friction driving wheel 12 to rotate, the circular ring 8 is driven to rotate through friction force between the friction driving wheel 12 and the circular ring 8, the supporting rods 701 and the clamping rods 702 are positioned to be matched with the blade body, rigidity and friction force required by clamping are obtained according to finite element analysis on a machining process, hydraulic force of the hydraulic cylinder 6 is adjusted, the supporting rods 701 and the clamping rods 702 are adjusted through the hydraulic cylinder 6 to clamp the blade body 18, and the arrangement of the machining tool for the blade body is completed.
The clamping method for clamping the blade body 18 by the support rods 701 and the clamping rods 702 is as follows:
the supporting rod 701 extends out firstly, and when the supporting rod 701 contacts the blade body, the supporting rod is automatically locked through the hydraulic pressure of the hydraulic cylinder 6, so that the current position of the blade body 18 is kept;
the clamping rod 702 is then extended to press the blade body 18 under the hydraulic force of the hydraulic cylinder 6, so as to clamp the blade body 18.
In order to improve the blade body processing quality and processing efficiency, the method calculates the area with weak rigidity of the blade by utilizing a finite element method before milling the blade body, so as to determine the layout position of a processing tool during processing. When the thin-wall blade body is precisely milled, the blade root tenon clamp 1 and the blade tip clamp 2 clamp blade root tenons and blade tip process bosses respectively, a supporting rod 701 and a clamping rod 702 in the processing tool are accurately positioned by utilizing a rotatable circular ring 8, and the blade body is clamped by adjusting the hydraulic cylinder 6, so that the rigidity of the blade body is improved, and the vibration deformation of a blade body workpiece is effectively reduced. After the positioning and clamping process is finished, the rotary shaft 14, the blade tenon clamp, the blade tip clamp 2, the blade workpiece and the circular ring 8 carrying the auxiliary supporting rods 701 and the clamping rods 702 of the numerical control machine tool can synchronously rotate, so that rotary milling of the blade body of the blade is smoothly finished, and the blade is ensured to obtain high processing precision and surface quality. The tool system and the use method thereof can be used for precise milling of the blade body of the aero-engine blade, and have the advantages of high efficiency, low cost and strong practicability while realizing precise processing of the height and the quality of the blade body of the aero-engine blade.
Examples
In this embodiment, a tooling system for a blade body precision machining process is provided, the tooling adopts a boss type clamp to clamp a blade root tenon 16 and a blade tip 17, adopts an adjustable support rod driven by a hydraulic system to clamp a blade body 18, and the adjustable support rod is distributed at a part with weak rigidity of the blade. In the precise milling process of the blade body 18, the part of the blade body 18 with weak rigidity is increased through the auxiliary supporting rod, the vibration and deformation generated in the precise milling process of the blade body 18 are reduced, and the stability of the whole blade processing process is maintained, and the specific technical scheme is as follows:
the embodiment of the tool system for the precise machining process of the blade body of the blade is matched with a five-axis numerical control machine tool for machining a blade workpiece, and three parts of a blade root tenon clamp 1, a blade body auxiliary support clamp and a blade tip clamp 2 are respectively arranged on a bottom plate of the numerical control machine tool from left to right, and the specific structure is as follows:
as shown in fig. 1, the blade root tenon clamp 1 is connected with a rotary shaft 14 of a numerical control machine tool, a groove matched with the blade root tenon 16 is formed, and clamping of the blade root tenon 16 is achieved through a set screw.
As shown in fig. 2, the blade body auxiliary support fixture mainly comprises a motor-driven screw transmission assembly, a hydraulic-driven auxiliary support assembly and a motor-driven friction transmission assembly.
The screw transmission assembly is assembled on the numerical control machine tool through the bottom plate and comprises a first driving motor 3, a motor bracket, a screw 4 and a sliding block 5. The screw transmission assembly is driven by the first driving motor 3 so that the auxiliary supporting assembly and the friction transmission assembly assembled on the slider linearly move to the weak part of the rigidity of the blade requiring auxiliary support.
The auxiliary support assembly is assembled on the slide 5 of the screw drive assembly and comprises a hydraulic cylinder 6, an adjustable support rod 701, a clamping rod 702 and a rotatable ring 8 as a carrier. The tail end of the adjustable supporting rod is an arc-shaped piece provided with a flexible clamp head, and the profile of the hinge body can be well attached. The auxiliary supporting component is driven by hydraulic pressure, and contacts with the blade workpiece through the supporting rod 701 and the clamping rod 702, so that the contact characteristic is changed, and the rigidity and the deformation resistance of the blade are improved.
The friction transmission assembly is assembled on a sliding block 5 of the screw transmission assembly and comprises a second driving motor 9, a connecting bent rod 10, a motor base, a transmission wheel driving motor 11 and a friction transmission wheel 12 which are assembled on the sliding block. The friction transmission assembly is driven by a second driving motor 9 and a driving wheel driving motor 11, and the circular ring 8 carrying the adjustable supporting rod 701 and the clamping rod 702 is rotated through friction transmission, so that positioning is realized.
As shown in fig. 4, the tip clamp 2 is connected with the tip 15 of the numerically-controlled machine tool, the shape of the tip clamp 2 is adapted to the tip 17 of the blade, and the tip 17 is clamped by a set screw.
As shown in fig. 3, the use method of the tooling system in this embodiment mainly includes the following steps:
step one: before the precise milling of the thin-wall blade body, the layout position of the auxiliary supporting rod during processing is determined by analyzing the area with weak rigidity of the blade workpiece, namely the area which is easy to vibrate and deform during processing, through a finite element method.
Step two: before milling the thin-wall blade body, milling blade root tenons of the blade blank obtained by precision forging and forming, and reserving a process boss at the blade tip part so as to facilitate the subsequent blade body milling.
Step three: when the thin-wall blade body is precisely milled, an auxiliary supporting clamp is assembled on a numerical control machine tool through a bottom plate 13, a blade root tenon clamp 1 is connected with a rotary shaft 14 of the numerical control machine tool, a blade root tenon 16 slides in along one side of the blade root tenon clamp 1, a blade tip process boss 17 is matched with a blade tip clamp 2, 3 fastening screws required by screwing the blade root tenon clamp 1 and 4 fastening screws required by the blade tip clamp are screwed, and a tip 15 on the numerical control machine tool acts on the blade tip clamp 2 to clamp the blade.
Step four: and (3) according to the layout position of the auxiliary supporting rod obtained by the finite element method in the step one, the auxiliary supporting clamp realizes positioning and clamping.
(1) According to the layout position of the auxiliary support rod, a screw rod transmission assembly in the auxiliary support clamp moves to enable a rotatable ring 8 carrying the support rod 701 and the clamping rod 702 to reach a preset position, a second driving motor 9 assembled on a sliding block in the friction transmission assembly acts at the moment to enable a friction driving wheel 12 to be matched with the rotatable ring 8, a driving wheel driving motor 11 acts to enable the ring 8 to rotate through friction, and therefore the support rod 701 and the clamping rod 702 are accurately positioned, and a blade body 18 is clamped through a hydraulic cylinder 6.
(2) After the positioning and clamping process is finished, the second driving motor 9 assembled on the sliding block acts to enable the friction driving wheel 12 to leave the rotatable circular ring 8, and at the moment, the rotary shaft 14, the blade root tenon clamp 1, the blade tip clamp 2, the blade workpiece and the circular ring 8 carrying the auxiliary supporting rods of the numerical control machine tool can synchronously rotate.
Step five: after the blade body clamping is completed, the milling of the blade body 18 is started, and the blade body needs to continuously rotate in the milling process to ensure the consistency of the processing quality. The whole processing process needs to continuously repeat the fourth step and the fifth step until the whole blade body 18 is processed, so that the blade body is ensured to obtain high processing precision and surface quality.
Aiming at the engineering difficult problem of precise milling of the blade body of the aero-engine, the method calculates the area which is easy to generate vibration during blade body processing before milling by using a finite element method, obtains the layout mode of the supporting rods of the auxiliary support, effectively inhibits the blade body processing vibration by using the auxiliary support tool during milling processing, and has important significance on precise milling processing of the blade of the aero-engine in terms of blade processing quality, implementation efficiency and working cost.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way; those skilled in the art will readily appreciate that the present invention may be implemented as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present invention are possible in light of the above teachings without departing from the scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the present invention.

Claims (10)

1. A processing tool for a blade body of a blade is characterized in that the processing tool is matched with a numerical control machine tool for processing the blade and comprises a screw transmission assembly, an auxiliary supporting assembly and a friction transmission assembly,
the screw transmission assembly comprises a first driving motor (3), a screw (4) and a sliding block (5), wherein the sliding block (5) is arranged on the bottom surface of the slot, the first driving motor (3) is arranged on the inner walls of the two sides of the slot, and the screw (4) passes through a through hole formed in the sliding block (5) to be connected with the first driving motors (3) on the two sides;
the friction transmission assembly comprises a second driving motor (9), a transmission wheel driving motor (11) and a friction transmission wheel (12), wherein the second driving motor (9) is arranged on one side of the sliding block (5), the output end of the second driving motor (9) is connected with the transmission wheel driving motor (11), and the output end of the transmission wheel driving motor (11) is connected with the friction transmission wheel (12);
the auxiliary support assembly comprises a hydraulic cylinder (6), a support rod (701), a clamping rod (702) and a circular ring (8), wherein the circular ring (8) is arranged on the surface of the sliding block (5) through a support, one side of the circular ring (8) is in matched contact with the friction driving wheel (12), the inner wall of the circular ring (8) is respectively connected with the support rod (701) and the clamping rod (702) through the hydraulic cylinder (6), and the support rod (701) and the clamping rod (702) are oppositely arranged to clamp the blade body (18).
2. A tooling for blade bodies according to claim 1, characterized in that the clamping end of the support bar (701) is provided with a rigid clamping head which is fitted with the profile of the blade body (18), and the clamping end of the clamping bar (702) is provided with a flexible clamping head which is fitted with the profile of the blade body (18).
3. The tooling for a blade airfoil of claim 2, wherein the flexible clamp head is made of a polymeric material and has a modulus of elasticity less than the modulus of elasticity of the blade material and the rigid clamp head.
4. The processing tool for the blade body according to claim 1, wherein the output end of the second driving motor (9) is connected with a motor base through a connecting bent rod (10), and the driving wheel driving motor (11) is arranged in the motor base.
5. The processing tool for the blade body according to claim 4, wherein the connecting bent rod (10) is an L-shaped rod, an inflection point of the L-shaped rod is connected with the output end of the second driving motor (9), and a bent rod end of one side of the L-shaped rod is connected with the motor base.
6. A machining system for a blade body, characterized by comprising a machining fixture for a blade body, a blade root tenon clamp (1) and a blade tip clamp (2) according to any one of claims 1-5;
the blade root tenon clamp (1) is connected with a rotary shaft (14) of the numerical control machine tool, and a groove matched with the blade root tenon (16) is formed in the blade root tenon clamp (1);
the blade tip clamp (2) is connected with a top (15) of the numerical control machine tool, and the shape of the blade tip clamp (2) is matched with the shape of the blade tip of the blade.
7. A machining system for a blade airfoil according to claim 6, characterized in that the blade root tenon clamp (1) is fixed by means of a set screw connection with the blade root tenon (16).
8. A machining system for a blade body according to claim 6, characterized in that the tip holder (2) is fixed to the blade tip by means of a set screw.
9. A method of use of a tooling for a blade airfoil, characterized in that the tooling for a blade airfoil as claimed in any one of claims 1-5 is arranged comprising the steps of:
the screw transmission assembly drives the circular ring (8) provided with the supporting rod (701) and the clamping rod (702) to reach the processing tool arrangement area;
and starting a second driving motor (9) to enable a friction driving wheel (12) to be in contact fit with the circular ring (8), starting a driving wheel driving motor (11) to enable the friction driving wheel (12) to rotate, driving the circular ring (8) to rotate through friction force between the friction driving wheel (12) and the circular ring (8), enabling a supporting rod (701) and a clamping rod (702) to be positioned at a position matched with a blade body (18), obtaining rigidity and friction force required by clamping according to finite element analysis of a machining process, adjusting hydraulic force of a hydraulic cylinder (6), and clamping the blade body (18) through adjusting the supporting rod (701) and the clamping rod (702) by the hydraulic cylinder (6), so as to finish the arrangement of a machining tool for the blade body.
10. The method for using the processing tool for the blade body according to claim 9, wherein the clamping method for clamping the blade body (18) by the support rod (701) and the clamping rod (702) is as follows:
the supporting rod (701) stretches out firstly, and when the supporting rod (701) contacts the blade body, the supporting rod is automatically locked through the hydraulic pressure of the hydraulic cylinder (6) to keep the current position of the blade body (18);
the clamping rod (702) is then extended to press the blade body (18) under the hydraulic force of the hydraulic cylinder (6) so as to clamp the blade body (18).
CN202210753171.6A 2022-06-29 2022-06-29 Machining tool and system for blade body and use method Active CN114985814B (en)

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CN118143701B (en) * 2024-05-11 2024-07-05 北京汉飞航空科技有限公司 Double-deck blade She Shenkong processing positioning fixture

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