CN206855041U - A kind of flexible fixture and processing unit (plant) for large complicated carved class blade milling - Google Patents

Abstract

The utility model discloses a kind of flexible fixture and processing unit (plant) for large complicated carved class blade milling, it solves the processing vibration problem in complex-curved thin-wall part process, the machining deformation of the thin-wall constructions such as large-scale blade can be reduced, the flutter in processing is reduced, its technical scheme is：Bottom clamping part including being arranged at workbench, bottom clamping part top are equipped with flexible clamping portion, and flexible clamping portion both ends are connected with horizontal mobile mechanism, and horizontal mobile mechanism end is connected with reciprocating mechanism；The flexible clamping portion includes living blade upper portion side wall with the flexible resilient clamp bodies being bonded of blade sidewall, resilient clamp bodies flexible clamping, and bottom clamping part clamps blade bottom；Horizontal mobile mechanism and reciprocating mechanism drive the position of resilient clamp bodies adjustment clamping blade in process, to reserve region to be processed.

Description

A kind of flexible fixture and processing unit (plant) for large complicated carved class blade milling

Technical field

Machining technology field is the utility model is related to, is used for large complicated carved class blade milling more particularly to one kind The flexible fixture and processing unit (plant) cut.

Background technology

At present, in aerospace industry, the cutting task to thin-wall part is vital, and the Varying-thickness of thin-wall part is thinned Processing is always processing and manufacturing problem.The Mold processing of complex-curved thin wall vane in space structure is big, poor rigidity, and mainly 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 Phenomena such as shape, resilience, the problems such as allowing knife, vibration be present, cause workpiece to deform, influence workpiece size precision, cutting surface quality And processing 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 the method that preferred cutting parameter in a kind of five-axis milling suppresses cutting vibration；Arnaud gives guarantee essence The optimal cutting parameter of degree and surface quality；Campa proposes a kind of method for estimating workpiece cutting stable region to avoid flutter. These research work mainly by adjusting 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 effective 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, can not control completely.

In terms of the optimization layout of fixture, Selvakumar et al. is proposed using experimental design algorithm, is built optimal Fixture Layout, the maximum flexibility deformation of workpieces processing is reduced, so as to suppress processing vibration.But existing fixture is whole with workpiece It is rigid contact, during five-axis milling, workpiece deformation and fixture deformation, induced vibration can be caused.Also, optimize in fixture Quantity and the position of clip and locator are not considered in research, and the problems such as the layout of fixture element.

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 clamping and positioning to root of blade tenon, therefore often due to the influence 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 the jacking mechanism held out against for blade radial is additionally provided between two grip blocks of pedestal.But The processing auxiliary clamp of this invention does not consider the tenon of macrophyll bottom, therefore this invention can not 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 can not 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 Existing vice clamp is replaced with vacuum adsorption type workbench, is overcome because presser type clamping makes parts locally stress produce elasticity The problem of deformation, thin-walled frame clsss part uniform stressed can be made during clamping, and then solve current thin-walled framework class Fixture when part is processed causes parts locally stress, easily makes part generation elastic deformation, part quality be extremely difficult to design It is required that the problem of.Although the clamping effect of foregoing invention is very considerable, its application category has been confined among flat thin wall pieces, Clamping can not 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 bottom plate with flexible, is fixed with some cross slid platforms on bottom plate, is mounted on each cross slid platform Platform is vertically moved up or down, each platform that is vertically moved up or down is provided with sucker by sucking disk bar or is provided with cue ball by universal ball bearing.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 universal ball bearing being changed to sucking disk bar, be station-keeping mode by control mode switch.Meanwhile can between each axle and bottom plate With disassembled and assembled freely, flexibility function is fully demonstrated, the workpiece deformation in milling process can be effectively reduced, improve work pieces process essence Degree.Although the servo-actuated effect of the invention is fine, application category has been confined to flat thin wall pieces, can not be applied to 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 are 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 between support and bearing rod by first connecting rod and second connecting rod.Enter when to thin-wall workpiece Row vertical milling when, device can apply supporting force in the opposite side of thin-walled machined surface, thin-wall part carried out auxiliary with the movement of cutter 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 it is ineffective：1st, when device is servo-actuated supporting curved surface thin-walled surface, can cause to fill due to the Varying-thickness on surface The displacement produced along thin-wall face normal direction is put, and because cylinder is open loop, feedback-less mechanism, application supporting force is constant, causes Thin-wall part stress is excessive, or even to machined surface lateral bend, fragile cutter；Also easily cause connecting rod bending, breaking plant simultaneously. 2nd, contact of the present apparatus with workpiece is rigid contact, it is impossible to plays 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 without servo-actuated supporting or blade clamping device, therefore good suppression can not be played to caused flutter in thin-wall part process 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 be fixedly mounted, 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；Connected cylinder beam is loaded on process equipment three on the outside of back plate On dog chuck, make clamp body hanging, realize that main shaft rotating band movable vane piece wax-pattern and clamp body rotate 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 solves no auxiliary positioning core print The orientation problem of small-sized hollow turbine vane wax-pattern；Avoided in process because of position error caused by clamping, and one twice Determine to reduce connection tool marks in degree, cantilever-designed enhances wax pattern rigidity, avoids being broken in process.But should Invention have ignored the small 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 influenceed, finally influences machining accuracy.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, is had one and is formed with rectangular through-hole 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 downward connection 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 protrudes is simple in construction, operation side Just, clamping is 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, the flutter of blade is not considered, be not provided with corresponding blade and be servo-actuated fixture.

There is clearly disadvantageous and limitation in existing thin-wall part milling fixture, some aim at the fixture of thin-wall workpiece design There is follow-up bearing device in although, good suppression can not be still played to caused flutter in thin-wall part process and is made With as the patent of invention of application number 201610346138.6 discloses a kind of using supplemented by fixed bearing, moveable branch of floating Support pattern based on holding, fixed bearing are 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 floated, make workpiece Uniform force, unnecessary initial residual stress is prevented, so as to reduce clamp error, improve machining accuracy.But the hair 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 incomplete, causes workpiece to make to be forced to vibrate in process, and be random vibration. Guide rail, guide screw movement will reduce machining accuracy because the reciprocating motion gap of its own.Moreover, needed for fixture in this invention The intelligent chucking appliance system wanted is relative complex, and sensor application is more, and cost is higher；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 summary, still lack for the processing vibration problem in complex-curved thin-wall part process in the prior art Effective solution.

Utility model content

In order to overcome the above-mentioned deficiencies of the prior art, the utility model, which provides, a kind of is used for large complicated carved class blade The flexible fixture of milling, there is provided flexible clamping portion, can reduce the machining deformation of the thin-wall constructions such as large-scale blade, reduce processing In flutter, and then solve in large thin-wall blade milling process because rigidity is weak and caused by machining deformation is big and finished surface matter Amount such as is difficult to ensure that at the problem and curved surface class part difficulty clamping the problem of.

Further, the utility model uses following technical proposals：

A kind of flexible fixture for large complicated carved class blade milling, including it is arranged at the bottom clamping of workbench Portion, bottom clamping part top are equipped with flexible clamping portion, and flexible clamping portion both ends are connected with horizontal mobile mechanism, water Flat travel mechanism end is connected with reciprocating mechanism；

The flexible clamping portion includes living with the flexible resilient clamp bodies being bonded of blade sidewall, resilient clamp bodies flexible clamping Blade upper portion side wall, bottom clamping part clamp 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.

Fixture of the present utility model, there is provided flexible clamping portion and bottom clamping part to be engaged, guarantee it is reliably secure Clamping on the premise of, flexible clamping portion can give blade with flexible clamping power, the thin-wall constructions such as large-scale blade can be reduced Machining deformation, the flutter in processing is reduced, reduce mismachining tolerance, improve machining accuracy；Flexible clamping portion of the present utility model can With in the horizontal direction with moved in 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, leave the cavity passed through for blade in the middle part of supporting air bag, prop up Hold and be brought into close contact under air bag full state with blade sidewall.Filled out in supporting air bag and set gas as filled media so that supporting gas Capsule can be bonded completely with the blade of curved surface, and the flexibility for supporting air bag can suppress caused in process and tremble.

Further, the supporting air bag is ellipsoidal structure.Supporting air bag is arranged to ellipsoidal structure, with curved surface The side of blade is more bonded.

Further, the supporting air bag sidepiece carries valve, and valve connects with inflation mechanism.Valve can use American Valve, American type valve are 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 are 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, which coordinates, 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 is cooperated and clamps horizontal mobile mechanism, and horizontal mobile mechanism can be driven reliably to realize and moved up and down.

Further, the horizontal mobile mechanism includes the sleeve structure for being sheathed on 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 coordinates with upper leading screw nut, sleeve structure bottom and lower leading screw nut Coordinate.

Further, the resilient clamp bodies both 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 It is the horizontal level that can adjust resilient clamp bodies 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 are 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 installation of motivation structure, can consolidate, reliably fix sleeve structure, while sleeve structure can also be Freely rotated in the gap of first groove and the second groove, so as 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, moving jaw body and regular jaw the 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 fixing clip at the top of the brave bench vice jaw body of bottom clamping part, the clamping face of bottom clamping part and blade is increased Product, while blade is clamped between two fixture blocks, its clamped height to blade is increased, between moving jaw body and regular jaw body It can be the tenon slot milling of blade bottom, avoid interference of the tenon to macrophyll piece clamping.

The utility model additionally provides one kind and is used for large complicated carved class blade milling device, including as described above Flexible fixture.

It is complicated in clamping that the utility model additionally provides a kind of flexible fixture for large complicated carved class blade milling Application in curved surface thin-wall workpiece.

The utility model additionally provides a kind of clamping method of the flexible fixture for large complicated carved class blade milling, Comprise the following steps：

Blade bottom fixed clamp is lived into blade upper portion side wall in bottom clamping part, resilient clamp bodies flexible clamping；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 beneficial effects of the utility model are：

Flexible gripper structures of the present utility model are simple, and the solid and reliable property of structure is stronger, convenient for production, easy-to-use, Support effects are good；

Flexible fixture of the present utility model solves the problem that large-scale blade is not easy clamping due to the presence of tenon, and It is more stable during clamping blade, firm；

For the utility model using filled media of the gas as supporting air bag, supporting air bag can be complete with the blade of curved surface Fitting, machining deformation is reduced, and rely on the flexibility of itself, suppress processing flutter, directly reduce processing noise, reduced processing and miss Difference, improve machining accuracy；

Installation and debugging before being either machined, dismounting supporting capsule is still machined, it is all very simple to operation； The utility model seriation, the operation in the matching application of machining to worker, can be quickly wide without particular/special requirement Big worker is grasped.

The utility model 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 Its industry for lightweight processing, noise, stability and the reliability requirement height of aircraft, ship, precision optical machinery equipment etc. etc. Field, there is very wide popularizing application prospect.

Brief description of the drawings

The Figure of description for forming 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 illustrate be used for explain the application, do not form the improper restriction to the application.

Fig. 1 is the structural representation of the utility model flexible fixture；

Fig. 2 is the diagrammatic cross-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.

Embodiment

It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is 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 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, the processing vibration in complex-curved thin-wall part process in the prior art be present The problem of, 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, bottom clamping part 2 is fixed with workbench 1, and the top of bottom clamping part 2 is matched somebody with somebody Close and flexible clamping portion is set, flexible clamping portion both ends are connected with horizontal mobile mechanism, and horizontal mobile mechanism end is with above moving down Motivation structure connects；Flexible clamping portion includes living with the flexible resilient clamp bodies being bonded of blade sidewall, resilient clamp bodies flexible clamping Blade upper portion side wall, bottom clamping part 2 clamp 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 connected through a screw thread a lower leading screw nut 4, and the top of lower leading screw nut 4 has One sleeve structure 5 is enclosed on leading screw 3, and equally there is a upper leading screw nut 6 top of sleeve structure 5, with leading screw 3 it is nethermost 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 both ends of sleeve structure 5 are respectively embedded into the special groove of upper leading screw nut 6 and lower leading screw nut 4, sleeve structure 5 The center of riser 11 is connected with supporting air bag 8, and supporting in the periphery of air bag 8 has a valve 10, 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 by pneumatic head connection, deflated.Sleeve structure 5, riser 11 are common Horizontal mobile mechanism is formed, supporting air bag 8 is resilient clamp bodies, and the middle part of supporting air bag 8 is left the cavity passed through for blade, propped up Hold and be brought into close contact under the full state of air bag 8 with blade sidewall.In process due to the effect of gas supporting air bag, can subtract The machining deformation of the thin-wall constructions such as small large-scale blade, reduce the flutter in processing；And then solves large thin-wall blade milling During cutting because rigidity is weak and caused by machining deformation greatly and machined surface quality such as is difficult to ensure that at problem and the curved surface part hardly possible The problem of with 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 include 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, fixture block 14 is fastened on adjustable clamp by screw and screwed hole On mouthful body 12 and regular jaw body 13, the distance between fixture block 14 be less than between regular jaw body 13 and moving jaw body 12 away from From.Bottom clamping part 2 of the present utility model increase brave bench vice can its clamped height, suitable for bottom carry tenon blade, The clamping scope of application is wider；Blade is clamped between two fixture blocks 14, blade is accommodated between moving jaw body 12 and regular jaw body 13 Tenon, be large-scale blade bottom tenon slot milling, avoid interference of the tenon to macrophyll piece clamping.

Leading screw 3 is threadedly attached on workbench 1, is clamped positioned at the left and right sides of bottom clamping part 2 and apart from bottom The larger distance of portion 2, ensures during feed, and leading screw 3 will not interfere with the motion of knife rest, and because leading screw 3 is similar to cantilever Girder construction, it is material that should select the larger carbon steel of rigidity or steel alloy, and the height of leading screw 3 should be greater than the height of large-scale blade Degree, ensure that the utility model is applied to whole Milling Processes of blade, lower leading screw nut 4 and upper leading screw spiral shell on leading screw 3 Mother 6 can be with rotation and lifting, so as to the height beneficial to adjustment 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 is mainly responsible for lifting sleeve knot Structure 5, upper leading screw nut 6 are 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 of steel pipe, and sleeve structure 5 is welded to connect with one piece of riser 11 with hole slot, and riser 11 is adopted It is made of steel plate, the side of wherein steel pipe is welded with the riser 11 parallel to pipe sleeve axis, is provided with hole slot among riser 11, 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, ensure that nut 9 completely attaches to riser 11.

Connecting rod 7 is hollow stem, typically with steel pipe, while reducing its own quality, will not reduce its rigidity, connection 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, supports and medium is supported in air bag 8 as sky Gas, supporting air bag 8 can completely be bonded with the curved surface of large-scale blade face to be processed, while strengthening large-scale blade stiffness, may be used also To pass through hard PVB on the outside of oval major axis both ends using the flexible flutter for weakening or suppressing blade of itself, supporting air bag 8 Material is connected with connecting rod 7, increases the rigidity of supporting air bag 8.

The material for supporting air bag 8 can be butyl rubber, and material has air-tightness good, is not easy gas leakage, not oxidizable, prolonged There is a valve 10 in the advantages of durable, the outside of supporting air bag 8, convenient to support the inflation and deflation of capsule, and support air bag 8 can To be processed into various models, one series of self-contained, the blade construction of each size is adapted to.

Valve 10 uses American type valve, and American type valve coordinates 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 described 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：

Blade bottom fixed clamp is lived into blade upper portion side wall in bottom clamping part, resilient clamp bodies flexible clamping；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 the technical scheme of the application can clearly be understood by obtaining those skilled in the art, below with reference to tool The operating process of body describes the technical scheme of the application in detail.

Step process using the clamping of flexible fixture of the present utility model in process is：

The bottom (boss above tenon) of large-scale blade is fixed on bottom clamping part 2.

The upper leading screw nut 6 on rotating threaded shaft 3 is elevated above at the height of large-scale blade respectively.

Lower leading screw nut 4 on rotating threaded shaft 3 respectively, rise to the top end of large-scale blade simultaneously together with sleeve structure 5.

Supporting air bag 8 in unaerated state is enclosed on large-scale blade tip position on the lower side, supports the top of air bag 8 Region to be processed is reserved, the regulation lower leading screw nut 4 i.e. height of adjusting sleeve pipe structure 5, set is inserted at the both ends of connecting rod 7 respectively In the hole slot of tubular construction 5, the corner of adjusting sleeve pipe structure 5 and connecting rod 7 make connecting rod 7 perpendicular to set in the position of hole slot The hole slot wall of tubular construction 5, then connecting rod 7 is fixed 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 and contacts with sleeve structure 5 and match somebody with somebody with lower leading screw nut 4 Co-clip tight set tubular construction 5.

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, air pressure in supporting air bag 8 is reached 15kPa, locate normal operating conditions.

With being normally carried out for processing, when region to be processed is near supporting air bag 8, machine tooling need to be suspended, will The gas supported in 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 move down, continue to reserve region to be processed simultaneously together with connecting rod 7 and supporting air bag 8.

Above step is repeated, until machining.

The preferred embodiment of the application is the foregoing is only, is not limited to the application, 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 substitution, 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, it is characterized in that, including be arranged under workbench Portion's clamping part, is equipped with flexible clamping portion above the clamping part of bottom, and flexible clamping portion both ends are and horizontal mobile mechanism Connection, horizontal mobile mechanism end is connected with reciprocating mechanism；The flexible clamping portion includes being bonded with blade sidewall flexibility Resilient clamp bodies, resilient clamp bodies flexible clamping lives blade upper portion side wall, and bottom clamping part clamps blade bottom；It is processed Horizontal mobile mechanism and reciprocating mechanism drive the position of resilient clamp bodies adjustment clamping blade in journey, to be processed to reserve Region.

2. flexible fixture as claimed in claim 1, it is characterized in that, the resilient clamp bodies are supporting air bag, are supported in air bag Portion leaves the cavity passed through for blade, supports and is brought into close contact under air bag full state with blade sidewall；The supporting air bag is ellipse Circular configuration.

3. flexible fixture as claimed in claim 2, it is characterized in that, the supporting air bag sidepiece carries valve, valve and inflation Mechanism connection.

4. flexible fixture as claimed in claim 1, it is characterized in that, the reciprocating mechanism includes the silk being fixedly arranged in work Thick stick, upper leading screw nut and lower leading screw nut is equipped with the leading screw, the lower leading screw nut upper support moves horizontally machine Structure, upper leading screw nut coordinates with lower leading screw nut clamps horizontal mobile mechanism.

5. flexible fixture as claimed in claim 4, it is characterized in that, the horizontal mobile mechanism includes the sleeve pipe for being sheathed on leading screw Structure, the riser of the oval hole slot of described sleeve pipe structure side wall connect band；Described sleeve pipe structural top coordinates with upper leading screw nut, set Tubular construction bottom coordinates with lower leading screw nut.

6. flexible fixture as claimed in claim 5, it is characterized in that, the resilient clamp bodies both ends are equipped with connecting rod, connection Bar is fixedly connected at the oval hole slot of riser.

7. flexible fixture as claimed in claim 5, it is characterized in that, the upper leading screw nut top carries the first groove, described Lower leading screw nut bottom carries the second groove, and sleeve structure is located between the first groove and the second groove.

8. flexible fixture as claimed in claim 1, it is characterized in that, the bottom clamping part includes brave bench vice, the brave bench vice Including moving jaw body and regular jaw body, fixture block is respectively and fixedly provided with the top of the moving jaw body and regular jaw body.

9. flexible fixture as claimed in claim 8, it is characterized in that, the distance between described fixture block is less than regular jaw body and work The distance between movable clamp port body.

10. one kind is used for large complicated carved class blade milling device, including soft as described in claim any one of 1-9 Property fixture.