CN106624907A - Flexible fixture for milling of large complex surface type blade and method of flexible fixture - Google Patents
Flexible fixture for milling of large complex surface type blade and method of flexible fixture Download PDFInfo
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- CN106624907A CN106624907A CN201710163784.3A CN201710163784A CN106624907A CN 106624907 A CN106624907 A CN 106624907A CN 201710163784 A CN201710163784 A CN 201710163784A CN 106624907 A CN106624907 A CN 106624907A
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- blade
- flexible
- leading screw
- fixture
- clamping
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- 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
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/063—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding turbine blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/16—Working surfaces curved in two directions
- B23C3/18—Working surfaces curved in two directions for shaping screw-propellers, turbine blades, or impellers
-
- 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
- B23Q3/066—Bench vices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a flexible fixture for milling of a large complex surface type blade and a method of the flexible fixture. The flexible fixture and the method solve the processing vibration problem in a processing procedure of a complex surface thin-walled workpiece, the processing deformation of the thin-walled structure like a large blade can be reduced, and the vibration during processing can be reduced. The flexible fixture is characterized in that the flexible fixture comprises a lower clamping part arranged at a workbench; a flexible clamping part is arranged on the lower clamping part in a matched manner; the two ends of the flexible clamping part are connected with a horizontal movement mechanism; the end part of the horizontal movement mechanism is connected with a vertical movement mechanism; the flexible clamping part comprises an elastic clamping body flexibly bonded with the side wall of the blade; the elastic clamping body flexibly clamps the side wall of the upper part of the blade; the lower clamping part clamps the bottom of the blade; in a processing procedure, the horizontal movement mechanism and the vertical movement mechanism drives the elastic clamping body to adjust a position for clamping the blade, for reserving a to-be-processed area.
Description
Technical field
It is more particularly to a kind of for large complicated carved class blade milling the present invention relates to machining technology field
Flexible fixture and method.
Background technology
At present, in aerospace industry, cutting task to thin-wall part it is critical that, and the Varying-thickness of thin-wall part is thinning
A processing always processing and manufacturing difficult problem.The Mold processing of the complex-curved thin wall vane in space structure is big, poor rigidity, and it is main with
Five-axis milling is main processing mode.Hardly possible processing structure and complicated processing technique cause thin-wall construction work in-process to be easy to produce change
The phenomenons such as shape, resilience, there are problems that allowing knife, cause workpiece to deform, affect workpiece size precision, cutting surface quality
And working (machining) efficiency.
For the processing vibration problem in complex-curved thin-wall part process, lot of domestic and international scholar has carried out correlation
Research.
In terms of preferred cutting parameter, Kersting is proposed using emulation, predicts renewable cutting during five-axis milling
Cut flutter；Biemann proposes a set of emulation mode that can calculate five-axis milling processing vibration and finished surface modeling side
Method；Zhou proposes a kind of method that preferred cutting parameter suppresses cutting vibration in five-axis milling；Arnaud gives guarantee essence
The optimum cutting parameter of degree and surface quality；Campa proposes a kind of method of estimation workpiece cutting stable region to avoid flutter.
These research work mainly pass through to adjust cutting parameter to a certain extent, so as to control the vibration of thin-walled flexible member.Pass through
Although changing cutting parameter processing vibrational energy accesses effectively control, can not suppress to vibrate from root, therefore
The effectiveness in vibration suppression played in milling thin-walled flexible workpiece is unsatisfactory.Also, for the more complicated impeller blade of forming surface
Processing, the adjustment of involved cutting parameter is excessively complicated, it is impossible to control completely.
In terms of the optimization layout of fixture, Selvakumar et al. is proposed using experimental design algorithm, is built optimal
Fixture Layout, reduces the maximum flexibility deformation of processing workpiece, so as to suppress processing vibration.But, existing fixture and workpiece whole
It is rigid contact, during five-axis milling, workpiece deformation and fixture deformation, induced vibration can be caused.Also, in fixture optimization
Do not consider quantity and the position of clip and locator in research, and fixture element layout the problems such as.
There is clearly disadvantageous and limitation in existing thin-wall part milling fixture, some aim at the fixture of thin-wall workpiece design
In do not account for the clamping to root of blade tenon with positioning, therefore often due to the impact of tenon and directly affect with tenon
The clamping of integral blade and positioning.A kind of blade processing additional lock as disclosed in the patent of invention of application number 201610042625.3
Tool includes pedestal and is arranged at two grip blocks for being used for blade clamping of base end face, and two grip blocks can be joined by governor motion
Dynamic regulation is assemblied on pedestal, and between two grip blocks of pedestal the jacking mechanism held out against for blade radial is additionally provided with.But
The processing auxiliary clamp of this invention does not consider the tenon of macrophyll bottom, therefore this invention cannot blade of the clamping with tenon.
There is clearly disadvantageous and limitation in existing thin-wall part milling fixture, some aim at the fixture of thin-wall workpiece design
Complex-curved thin-wall workpiece, such as application number cannot be applied to：201510916102.2、201010268925.6、
201510285645.9 with the patents of invention such as 201510285670.7.The wherein He of application number 201010268925.6
201510916102.2 patent of invention disclosed a kind of thin-walled frame member milling fixture respectively at 2010 and 2015, profit
Replace existing vice clamp with vacuum adsorption type workbench, overcome because presser type clamping makes parts locally stress produce elasticity
A difficult problem for deformation, can make thin-walled frame clsss part uniform stressed during clamping, and then solve current thin-walled framework class
Part adds the fixture in man-hour to cause parts locally stress, easily makes part produce elastic deformation, part quality and is extremely difficult to design
The problem of requirement.Although the clamping effect of foregoing invention is very considerable, its application category has been confined among flat thin wall pieces,
Clamping cannot be carried out to complex-curved thin-walled parts.The patent of invention of application number 201510285645.9 provides a kind of thin-walled
Part milling is servo-actuated fixture, including base plate with flexible, and some cross slid platforms are fixed with base plate, is mounted on each cross slid platform
Vertical lift platform, each vertical lift platform is provided with sucker or is provided with cue ball by universal ball bearing by sucking disk bar.Peace
It is locating shaft to fill suctorial axle, and the axle for being provided with cue ball is servo axis, can mutually be changed between servo axis and locating shaft, only
Need for universal ball bearing to be changed to sucking disk bar, be station-keeping mode by control mode switch.Meanwhile, can between each axle and base plate
With disassembled and assembled freely, flexibility function is fully demonstrated, can effectively reduce the workpiece deformation in milling process, improve work pieces process essence
Degree.Although very well, application category has been confined to flat thin wall pieces to the servo-actuated effect of the invention, it is impossible to suitable for complex-curved
Thin-wall part.The patent of invention of application number 201510285670.7 provides a kind of servo-actuated supporting fixture of thin-wall part milling, including
Support, bearing rod and cylinder, bearing rod lower end is fixed with bearing by bearing positioning ring, and wherein cylinder one end is articulated with support,
The other end is articulated with bearing rod, is hinged by first connecting rod and second connecting rod between support and bearing rod.When entering to thin-wall workpiece
Row vertical milling when, device can apply supporting force with the movement of cutter in the opposite side of thin-walled machined surface, thin-wall part be carried out auxiliary
Help supporting.Play a part of certain reduction machining deformation.But, this device is primarily adapted for use in flat thin wall pieces, for curved surface
Large thin-wall blade effect on driving birds is not good：1st, when device is servo-actuated supporting curved surface thin-walled surface, dress can be caused due to the Varying-thickness on surface
The displacement produced along thin-wall face normal direction is put, but because cylinder is open loop, feedback-less mechanism, applying supporting force is constant, causes
Thin-wall part stress is excessive, or even to machined surface lateral bend, fragile cutter；Also it is easily caused connecting rod bending, breaking plant simultaneously.
2nd, contact of this device with workpiece is rigid contact, it is impossible to play a part of good suppression vibration.
There is clearly disadvantageous and limitation in existing thin-wall part milling fixture, some aim at the fixture of thin-wall workpiece design
In be servo-actuated supporting or blade clamping device, therefore cannot in thin-wall part process produce flutter play good suppression
Make and use, such as application number：201310104849.9 with 201410353976.7 grade, two patents.Wherein, application number
201310104849.9 patent of invention disclose a kind of Hollow turbine blade wax mould cantilever-type clamp, fixture is by front and rear panels
Vertical with intermediate plate to fixedly mount, the relative side of intermediate plate is opened wide, overall concave structure；Blade wax mould is placed on clamp body
It is interior, blade wax mould seeding section and pre-positioning block groove clamping, blade wax mould riser feeding section and post-positioning block upper table EDS maps
Four positioning support pin clampings, realize the positioning to blade wax mould；The connected cylinder beam in back plate outside is installed on process equipment three
On dog chuck, make clamp body hanging, realize that main shaft rotarily drives blade wax mould and clamp body is rotated together, clamped one time is completed
Blade wax mould blade back type face and the continuous helical Milling Process in leaf basin type face.Although the invention is solved without auxiliary positioning core print
The orientation problem of small-sized hollow turbine vane wax-pattern；Avoid in process because of the position error that twice clamping is produced, and one
Determine to reduce connection tool marks in degree, cantilever-designed enhances wax pattern rigidity, it is to avoid rupture in process.But should
Invention have ignored the little characteristic of rigidity of thin-wall part, not consider follow-up bearing device, therefore, the workpiece deformation meeting in milling process
Thickness of cutting is affected, machining accuracy is finally affected.The deformation of blade can equally produce cutting-vibration.Application number
Fixture is repaired in a kind of turbo blade type face disclosed in 201410353976.7 patent of invention, and with one rectangular through-hole is formed with
Pedestal.The clamp force open slot of clamping high-pressure turbine blade is formed with rectangular through-hole upper end, rectangular through-hole lower end is formed with connection downwards
Through slotted eye open seam, the fastening screw of the fastening adjustment joystick knob of assembling, longitudinally through the end face of pedestal one end clamping limb
Screw screw and rectangular through-hole, connect the other end clamping limb of pedestal.The characteristics of foregoing invention is projected is simple structure, operation side
Just, clamp stable, it is only necessary to which less power can reliablely and stablely fix high-pressure turbine blade tenon.But the invention only considered
The clamping of turbo blade tenon, does not consider the flutter of blade, is not provided with the servo-actuated fixture of corresponding blade.
There is clearly disadvantageous and limitation in existing thin-wall part milling fixture, some aim at the fixture of thin-wall workpiece design
Although in have follow-up bearing device, cannot still play good suppression to the flutter that produces in thin-wall part process and make
With the patent of invention of such as application number 201610346138.6 discloses one kind and adopts supplemented by fixed bearing, moveable floating
Support pattern based on holding, fixed bearing is located at the surrounding of workpiece, and moveable floating support is obtained by intelligent chucking appliance system
Initial position before cutter track footpath and work pieces process.During initial clamping, by the two kinds of supporting collective effects fixed and float, workpiece is made
Uniform force, prevents unnecessary initial residual stress, so as to reduce clamp error, improves machining accuracy.But, this
Stationary fixture in bright is rigid structure, can be produced in the Machine Movement Process of floating support and in working angles strong
Flutter, and the isolation mounting absorbing of fixture is not exclusively, causes workpiece to make to be forced vibration in process, and for random vibration.
Guide rail, guide screw movement will reduce machining accuracy because the reciprocating motion gap of its own.And, needed for the fixture in this invention
The intelligent chucking appliance system wanted is relative complex, and sensor application is more, relatively costly；And sensor detection position be it is exposed,
Sensor surface is easily protected from environmental, so as to be difficult to ensure that its reasonable accuracy.
In sum, the processing vibration problem in complex-curved thin-wall part process is still lacked in prior art
Effective solution.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of be used for large complicated carved class blade milling
Flexible fixture, be provided with flexible clamping portion, the machining deformation of the thin-wall constructions such as large-scale blade can be reduced, in reducing processing
Flutter, and then the machining deformation for solving to be caused because rigidity is weak in large thin-wall blade milling process is big and machined surface quality is difficult
With the difficult problems such as guarantee and the problem of curved surface class part hardly possible clamping.
Further, the present invention adopts following technical proposals：
A kind of flexible fixture for large complicated carved class blade milling, clamps including the bottom for being arranged at workbench
Portion, bottom clamping part top is equipped with flexible clamping portion, and flexible clamping portion two ends are connected with horizontal mobile mechanism, water
Flat travel mechanism end is connected with reciprocating mechanism；
The flexible clamping portion includes the resilient clamp bodies fitted with blade sidewall flexibility, and resilient clamp bodies flexible clamping is lived
Blade upper portion side wall, bottom clamping part clamps blade bottom；Horizontal mobile mechanism and reciprocating mechanism band in process
The position of dynamic elasticity cramping body adjustment clamping blade, to reserve region to be processed.
The fixture of the present invention, is provided with flexible clamping portion and bottom clamping part is engaged, and is guaranteeing reliably secure folder
On the premise of holding, flexible clamping portion can reduce the processing of the thin-wall constructions such as large-scale blade to blade with flexible clamping power
Deformation, reduces the flutter in processing, reduces mismachining tolerance, improves machining accuracy；The flexible clamping portion of the present invention can be in level
Move in direction and vertical direction, the region to be processed of blade is reserved, will not interfere with the process of blade.
Further, the resilient clamp bodies are supporting air bag, and the cavity passed through for blade is left at supporting air bag middle part,
Hold and be brought into close contact with blade sidewall under air bag full state.Fill out in supporting air bag and set gas as filled media so that supporting gas
Capsule can completely fit with the blade of curved surface, and supporting the flexibility of air bag can suppress what is produced in process to tremble.
Further, the supporting air bag is ellipsoidal structure.Supporting air bag is arranged to into ellipsoidal structure, with curved surface
More fit the side of blade.
Further, the supporting air bag sidepiece carries valve, and valve is connected with inflation mechanism.Valve can adopt American
Valve, American type valve is connected by American pneumatic head with inflation mechanism, intracapsular mainly by supporting using air pressure inverse closing principle
Power of bearing down on one is locked, and high pressure resistant, gas leakage is linearly relatively steep, i.e., faster, and valve flow of aerating air is big, is equipped with beautiful for gas leakage when air pressure is inadequate
Formula pneumatic head, the efficiency of inflation is very high.
Further, the reciprocating mechanism includes the leading screw being fixedly arranged in work, is equipped with the leading screw
Feed screw nut and lower leading screw nut, the lower leading screw nut upper support horizontal mobile mechanism, upper leading screw nut and lower leading screw spiral shell
Mother's cooperation clamps horizontal mobile mechanism.Lower leading screw nut plays a supportive role to horizontal mobile mechanism, upper leading screw nut and lower silk
Thick stick nut cooperates and clamps horizontal mobile mechanism, and horizontal mobile mechanism can be driven reliably to realize moving up and down.
Further, the horizontal mobile mechanism includes being sheathed on the sleeve structure of leading screw, and described sleeve pipe structure side wall connects
The riser of the oval hole slot of tape splicing；Described sleeve pipe structural top and upper leading screw nut screw connection, sleeve structure bottom and lower leading screw nut
Coordinate.
Further, the resilient clamp bodies two ends are equipped with connecting rod, and connecting rod is fixedly connected on the slotted hole of riser
At groove.Resilient clamp bodies are connected at the oval hole slot of horizontal mobile mechanism riser by connecting rod, fix resilient clamp bodies
The horizontal level of resilient clamp bodies is can adjust in the optional position of oval hole slot.
Further, the upper leading screw nut top carries the first groove, and the lower leading screw nut bottom carries second
Groove, sleeve structure is located between the first groove and the second groove.First groove and the second groove are set, level can be moved
The sleeve structure engaging chuck of motivation structure is installed, can consolidate, it is reliable fix sleeve structure, while sleeve structure can with
Freely rotate in the gap of the first groove and the second groove, such that it is able to adjust the position of connecting rod, and then connecting rod can be made
Vertical connection is kept with riser, be connected fastening.
Further, the bottom clamping part includes brave bench vice, and the brave bench vice includes moving jaw body and regular jaw
Body, the moving jaw body and regular jaw body top are respectively and fixedly provided with fixture block.
Further, the distance between described fixture block is less than the distance between regular jaw body and moving jaw body.
By the brave bench vice jaw body top fixing clip of bottom clamping part, the clamping face of bottom clamping part and blade is increased
Product, while clamping blade between two fixture blocks, increases its clamped height to blade, between moving jaw body and regular jaw body
Can be the tenon slot milling of blade bottom, it is to avoid interference of the tenon to macrophyll piece clamping.
Present invention also offers a kind of be used for large complicated carved class blade milling device, including as above soft
Property fixture.
Present invention also offers a kind of flexible fixture for large complicated carved class blade milling is complex-curved in clamping
Application in thin-wall workpiece.
Present invention also offers a kind of clamping method of the flexible fixture for large complicated carved class blade milling, including
Following steps：
By blade bottom fixed clamp in bottom clamping part, resilient clamp bodies flexible clamping lives blade upper portion side wall；In milling
Cut when being machined to close on resilient clamp bodies, release chucking power of the resilient clamp bodies to blade, reciprocating mechanism drives flexible folder
Portion's movement is held, the region to be processed for reserving blade supplies next step Milling Process.
Compared with prior art, the invention has the beneficial effects as follows：
The flexible gripper structures of the present invention are simple, and the solid and reliable property of structure is higher, convenient for production, easy-to-use, supporting
Effect is good；
The flexible fixture of the present invention solves the difficult problem that large-scale blade is difficult clamping due to the presence of tenon, and clamping
It is more stable during blade, firm；
Using gas as the filled media for supporting air bag, supporting air bag can completely be pasted the present invention with the blade of curved surface
Close, reduce machining deformation, and by the flexibility of itself, suppress processing flutter, directly reduce processing noise, reduce processing and miss
Difference, improves machining accuracy；
Installation and debugging before being either machined, still machine dismounting supporting capsule, all very simple to operation；
Seriation of the invention, to the operation of workman without particular/special requirement in the matching application of machining, can quickly by vast work
People is grasped.
The present invention can be used for the processing of the complex-curved class thin-wall part of the industries such as space flight, chemical industry, water conservancy, electric power, especially right
The industry field of lightweight processing, noise, stability and reliability requirement height in aircraft, ship, precision optical machinery equipment etc. etc.,
There is very wide popularizing application prospect.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrated for explaining the application, does not constitute the improper restriction to the application.
Fig. 1 is the structural representation of flexible fixture of the present invention；
Fig. 2 is the generalized section of upper leading screw nut；
Fig. 3 is the structural representation of bottom clamping part；
In figure, 1, workbench；2nd, bottom clamping part；3rd, leading screw；4th, lower leading screw nut；5th, sleeve structure；6th, upper leading screw spiral shell
It is female；7th, connecting rod；8th, air bag is supported；9th, nut；10th, valve；11st, riser；12nd, moving jaw body；13rd, regular jaw body；14、
Fixture block.
Specific embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, there is the processing vibration in complex-curved thin-wall part process in prior art
Problem, in order to solve technical problem as above, present applicant proposes a kind of for the soft of large complicated carved class blade milling
Property fixture.
In a kind of typical embodiment of the application, as shown in Figure 1, there is provided one kind is used for complex-curved class macrophyll
The flexible fixture of piece milling, including milling machine table 1, are fixed with bottom clamping part 2 on workbench 1, the top of bottom clamping part 2 is matched somebody with somebody
Close and flexible clamping portion is set, flexible clamping portion two ends are connected with horizontal mobile mechanism, and horizontal mobile mechanism end moves down with above
Motivation structure connects；Flexible clamping portion includes the resilient clamp bodies fitted with blade sidewall flexibility, and resilient clamp bodies flexible clamping is lived
Blade upper portion side wall, bottom clamping part 2 clamps blade bottom；Horizontal mobile mechanism and reciprocating mechanism band in process
The position of dynamic elasticity cramping body adjustment clamping blade, to reserve region to be processed.
Bottom clamping part 2 is each side fixed with a leading screw 3, is threadedly coupled with workbench 1, on two leading screws 3
Three parts are connected to, wherein bottom has been threaded connection a lower leading screw nut 4, and the top of lower leading screw nut 4 has
One sleeve structure 5 is enclosed within leading screw 3, and equally there is a upper leading screw nut 6 top of sleeve structure 5, it is nethermost with leading screw 3 under
Feed screw nut 4 is symmetrically connected on leading screw 3, and leading screw 3, lower leading screw nut 4, upper leading screw nut 6 are collectively forming reciprocating mechanism；
The two ends of sleeve structure 5 are respectively embedded in the special groove of upper leading screw nut 6 and lower leading screw nut 4, sleeve structure 5
The central authorities of riser 11 are connected with supporting air bag 8, there is a valve 10 in the supporting periphery of air bag 8, and the left and right sides passes through hard PVB
Material is connected with two connecting rods 7, and connecting rod 7 is hollow stem, and outermost end is tapped, is connected to the side of sleeve structure 5 and erects
In the oval hole slot of plate 11, and fixed by nut 9, valve 10 is filled, deflated by pneumatic head connection.Sleeve structure 5, riser 11 are common
Composition horizontal mobile mechanism, supporting air bag 8 is resilient clamp bodies, and the cavity passed through for blade is left at the middle part of supporting air bag 8,
Hold and be brought into close contact with blade sidewall under the full state of air bag 8.In process because gas supports the effect of air bag, can subtract
The machining deformation of the thin-wall constructions such as little large-scale blade, reduces the flutter in processing；And then solve large thin-wall blade milling
Because of a difficult problem and the curved surface part hardly possible such as the machining deformation that causes is big rigidity is weak and machined surface quality is difficult to ensure that during cutting
With the problem of clamping.
As shown in figure 3, bottom clamping part 2 is transformed based on traditional brave bench vice, including brave bench vice, brave bench vice includes
Moving jaw body 12 and regular jaw body 13, moving jaw body 12 and the top of regular jaw body 13 are respectively and fixedly provided with fixture block 14；Activity
Equal auger shell pit on jaw body 12 and regular jaw body 13, adjustable clamp is fastened on by fixture block 14 by screw and screwed hole
On mouthful body 12 and regular jaw body 13, the distance between fixture block 14 less than between regular jaw body 13 and moving jaw body 12 away from
From.What the bottom clamping part 2 of the present invention increased brave bench vice can its clamped height, it is adaptable to blade of the bottom with tenon, clamping
The scope of application is wider；Blade is clamped between two fixture blocks 14, the tenon of blade is accommodated between moving jaw body 12 and regular jaw body 13
Head, be the tenon slot milling of large-scale blade bottom, it is to avoid interference of the tenon to macrophyll piece clamping.
Leading screw 3 is threadedly attached on workbench 1, positioned at the left and right sides of bottom clamping part 2 and apart from bottom clamping
The larger distance of portion 2, it is ensured that during feed, leading screw 3 will not interfere with the motion of knife rest, and because leading screw 3 is similar to cantilever
Girder construction, should select the larger carbon steel of rigidity or steel alloy to be material, and the height of leading screw 3 should be greater than the height of large-scale blade
Degree, it is ensured that, suitable for whole Milling Processes of blade, the lower leading screw nut 4 and upper leading screw nut 6 on leading screw 3 can for the present invention
With rotation and lifting, so as to be beneficial to adjust the height of sleeve structure 5.
Lower leading screw nut 4 and upper leading screw nut 6 are connected by screw thread with leading screw 3, there is two lower leading screw spiral shells on every leading screw 3
Mother 4 and upper leading screw nut 6, distribution symmetrical above and below, are sandwiched between sleeve structure 5, and lower leading screw nut 4 mainly tie by responsible lifting sleeve
Structure 5, upper leading screw nut 6 is mainly responsible for coordinating the clamp sleeve structure 5 of lower leading screw nut 4, therefore, lower leading screw nut 4 and upper leading screw
Nut 6 must be used cooperatively in pairs, and wherein lower leading screw nut 4 is identical with the structure of upper leading screw nut 6, as shown in Fig. 2 lower leading screw spiral shell
Mother 4 and the one end of upper leading screw nut 6 are respectively provided with the second groove and the first groove, and the second groove and the first groove are special circular groove,
It is convenient to place sleeve structure 5.
Sleeve structure 5 is made using steel pipe, and sleeve structure 5 is welded to connect with one piece of riser 11 with hole slot, and riser 11 is adopted
Made with steel plate, the side of wherein steel pipe is welded with the riser 11 parallel to pipe box axis, and in the middle of riser 11 hole slot is provided with, and is beneficial to
Quick and gapless adjustment, fixed connecting rod 7, sleeve structure 5 can be rotated freely so as to ensure that connecting rod 7 is hung down with riser 11
Directly, it is ensured that nut 9 is completely attached to riser 11.
Connecting rod 7 is hollow stem, typically with steel pipe, while reducing its own quality, will not reduce its rigidity, is connected
The one end of bar 7 is connected to supporting air bag 8 both sides by hard PVB materials, and the other end is tapped.
Supporting air bag 8 is oval-shaped support capsule, and inside is equal thickness toroidal cavity, and medium is supported in supporting air bag 8 for sky
Gas, supporting air bag 8 can completely fit with the curved surface of large-scale blade face to be processed, while strengthening large-scale blade stiffness, may be used also
So that using the flexible flutter for weakening or suppressing blade of itself, the oval major axis two ends outside of supporting air bag 8 passes through hard PVB
Material is connected with connecting rod 7, increases the rigidity of supporting air bag 8.
The material of supporting air bag 8 can be butyl rubber, and material has air-tightness good, is difficult gas leakage, not oxidizable, prolonged
Durable advantage, supporting the outside of air bag 8 has a valve 10, the inflation of convenient supporting capsule with deflate, and support air bag 8 can
To be processed into various models, from into a series, the blade construction of each size is adapted to.
Valve 10 adopts American type valve, American type valve to coordinate with American pneumatic head；Using air pressure inverse closing principle, mainly
Locked by supporting the intracapsular power of bearing down on one, high pressure resistant, gas leakage is linearly relatively steep, i.e., faster, and valve 10 is inflated for gas leakage when air pressure is inadequate
Flow is big, is equipped with American pneumatic head, and the efficiency of inflation is very high.
In the typical embodiment of another kind of the application, there is provided one kind adds for large complicated carved class blade milling
Frock is put, including flexible fixture as above.
In the typical embodiment of another kind of the application, there is provided a kind of for large complicated carved class blade milling
Application of the flexible fixture in the complex-curved thin-wall workpiece of clamping.
In the typical embodiment of another kind of the application, there is provided a kind of for large complicated carved class blade milling
The clamping method of flexible fixture, comprises the following steps：
By blade bottom fixed clamp in bottom clamping part, resilient clamp bodies flexible clamping lives blade upper portion side wall；In milling
Cut when being machined to close on resilient clamp bodies, release chucking power of the resilient clamp bodies to blade, reciprocating mechanism drives flexible folder
Portion's movement is held, the region to be processed for reserving blade supplies next step Milling Process.
In order that those skilled in the art can clearly understand the technical scheme of the application, below with reference to tool
The operating process of body describes the technical scheme of the application in detail.
Using the present invention flexible fixture clamping in process the step of process be：
The bottom (boss above tenon) of large-scale blade is fixed on bottom clamping part 2.
Respectively the upper leading screw nut 6 on rotating threaded shaft 3 is elevated above at the height of large-scale blade.
Respectively the lower leading screw nut 4 on rotating threaded shaft 3, together with sleeve structure 5 top end of large-scale blade is risen to simultaneously.
Supporting air bag 8 in unaerated state is enclosed within into large-scale blade tip position on the lower side, the top of air bag 8 is supported
Region to be processed is reserved, the lower leading screw nut 4 i.e. height of adjusting sleeve pipe structure 5 is adjusted, set is inserted respectively at the two ends of connecting rod 7
In the hole slot of tubular construction 5, the corner and connecting rod 7 of adjusting sleeve pipe structure 5 make connecting rod 7 perpendicular to set in the position of hole slot
The hole slot wall of tubular construction 5, is then fixed connecting rod 7 with two nuts 9 in the both sides of hole slot.
Then the upper leading screw nut 6 on leading screw 3 is rotated down to be contacted with sleeve structure 5 and is matched somebody with somebody with lower leading screw nut 4
The tight sleeve structure 5 of co-clip.
It is supporting air bag 8 using equipment such as air pump and pneumatic control valves by the connection of American pneumatic head and valve 10
Inflation, makes air pressure in supporting air bag 8 reach 15kPa, locates normal operating conditions.
With being normally carried out for processing, when region to be processed is when supporting near air bag 8, machine tooling need to be suspended, will
Gas in supporting air bag 8 is extracted out, then unclamps the nut 9 of fixed connecting rod 7, afterwards that the lower leading screw nut 4 of leading screw 3 is downward
Rotation, sleeve structure 5 is moved down simultaneously together with connecting rod 7 with supporting air bag 8, continues to reserve region to be processed.
Repeat above step, until machining.
The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of flexible fixture for large complicated carved class blade milling, is characterized in that, including being arranged under workbench
Portion's clamping part, bottom clamping part top is equipped with flexible clamping portion, and flexible clamping portion two ends are and horizontal mobile mechanism
Connection, horizontal mobile mechanism end is connected with reciprocating mechanism；
The flexible clamping portion includes the resilient clamp bodies fitted with blade sidewall flexibility, and resilient clamp bodies flexible clamping lives blade
Upper portion side wall, bottom clamping part clamps blade bottom；Horizontal mobile mechanism and reciprocating mechanism band are moved in process
Property cramping body adjustment clamping blade position, to reserve region to be processed.
2. flexible fixture as claimed in claim 1, is characterized in that, the resilient clamp bodies are supporting air bag, in supporting air bag
Portion leaves the cavity passed through for blade, is brought into close contact with blade sidewall under supporting air bag full state；Preferably, the supporting gas
Capsule is ellipsoidal structure.
3. flexible fixture as claimed in claim 2, is characterized in that, the supporting air bag sidepiece carries valve, valve and inflation
Mechanism connection.
4. flexible fixture as claimed in claim 1, is characterized in that, the reciprocating mechanism includes the silk being fixedly arranged in work
Thick stick, is equipped with upper leading screw nut and lower leading screw nut on the leading screw, the lower leading screw nut upper support moves horizontally machine
Structure, upper leading screw nut clamps horizontal mobile mechanism with lower leading screw nut screw connection.
5. flexible fixture as claimed in claim 4, is characterized in that, the horizontal mobile mechanism includes being sheathed on the sleeve pipe of leading screw
Structure, the riser of the oval hole slot of described sleeve pipe structure side wall connect band；Described sleeve pipe structural top and upper leading screw nut screw connection, set
Tubular construction bottom and lower leading screw nut screw connection.
6. flexible fixture as claimed in claim 5, is characterized in that, the resilient clamp bodies two ends are equipped with connecting rod, connection
Bar is fixedly connected at the oval hole slot of riser；
Further, the upper leading screw nut top carries the first groove, and the lower leading screw nut bottom carries the second groove, set
Tubular construction is located between the first groove and the second groove.
7. flexible fixture as claimed in claim 1, is characterized in that, the bottom clamping part includes brave bench vice, the brave bench vice
Including moving jaw body and regular jaw body, the moving jaw body and regular jaw body top are respectively and fixedly provided with fixture block；
Further, the distance between described fixture block is less than the distance between regular jaw body and moving jaw body.
8. it is a kind of to be used for large complicated carved class blade milling device, including soft as described in any one of claim 1-7
Property fixture.
9. application of the flexible fixture as described in any one of claim 1-7 in the complex-curved thin-wall workpiece of clamping.
10. the clamping method of the flexible fixture as described in any one of claim 1-7, is characterized in that, comprise the following steps：
By blade bottom fixed clamp in bottom clamping part, resilient clamp bodies flexible clamping lives blade upper portion side wall；In milling plus
Work to close on resilient clamp bodies when, release chucking power of the resilient clamp bodies to blade, reciprocating mechanism drives flexible clamping portion
Mobile, the region to be processed for reserving blade supplies next step Milling Process.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710163784.3A CN106624907B (en) | 2017-03-17 | 2017-03-17 | A kind of flexible fixture and method for large complicated carved class blade milling |
| KR1020197011280A KR102190261B1 (en) | 2017-03-17 | 2017-09-29 | Flexible clamp and method used for milling large complex curved blades |
| PCT/CN2017/104481 WO2018166181A1 (en) | 2017-03-17 | 2017-09-29 | Flexible clamp and method for use in milling blades having large complex curved surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710163784.3A CN106624907B (en) | 2017-03-17 | 2017-03-17 | A kind of flexible fixture and method for large complicated carved class blade milling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106624907A true CN106624907A (en) | 2017-05-10 |
| CN106624907B CN106624907B (en) | 2018-11-30 |
Family
ID=58848429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710163784.3A Active CN106624907B (en) | 2017-03-17 | 2017-03-17 | A kind of flexible fixture and method for large complicated carved class blade milling |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR102190261B1 (en) |
| CN (1) | CN106624907B (en) |
| WO (1) | WO2018166181A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102190261B1 (en) | 2020-12-11 |
| CN106624907B (en) | 2018-11-30 |
| WO2018166181A1 (en) | 2018-09-20 |
| KR20190073375A (en) | 2019-06-26 |
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