CN103009155B - Self-adaptive eccentric fixture - Google Patents

Self-adaptive eccentric fixture Download PDF

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Publication number
CN103009155B
CN103009155B CN201210586642.5A CN201210586642A CN103009155B CN 103009155 B CN103009155 B CN 103009155B CN 201210586642 A CN201210586642 A CN 201210586642A CN 103009155 B CN103009155 B CN 103009155B
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China
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fixture
flexible
square
blade
tapered sleeve
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CN201210586642.5A
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Chinese (zh)
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CN103009155A (en
Inventor
陈志同
于建华
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北京航空航天大学
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Priority to CN201210586642.5A priority Critical patent/CN103009155B/en
Publication of CN103009155A publication Critical patent/CN103009155A/en
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Publication of CN103009155B publication Critical patent/CN103009155B/en

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Abstract

The invention relates to a self-adaptive eccentric fixture which comprises an eccentric fixture matrix, two accompanying fixture blocks, two sets of fixture block fixing devices and a flexible connection device, wherein the two accompanying fixture blocks are of the same structures and are arranged in the opposite directions; the two sets of fixture block fixing devices are connected to the fixture matrix; the flexible connection device is used for connecting the fixture matrix to a machine tool; the pair of accompanying fixture blocks is arranged on a positioning surface of the eccentric fixture matrix; the centers of the accompanying fixture blocks are coaxial with a rotating shaft of the integral eccentric fixture matrix; the flexible connection device is arranged on a positioning shaft at the left side of the eccentric fixture matrix; and the fixture block fixing devices are arranged between the flexible connection device and the eccentric fixture matrix. A blade is arranged on the two accompanying fixture blocks by a double-end positioning reference. One side of the integral fixture system is connected with a rotating working table of the machine tool by a flexible adjustable flange assembly and the other side of the integral fixture system is directly aligned and pressed by a hydraulic centre. The fixture is mainly used for processing weakly ridge blades.

Description

A kind of self adaptation eccentric fixture
Technical field
The present invention relates to a kind of self adaptation eccentric fixture, it is that one utilizes eccentric stiffener to do supplemental support to make clamping machine tool power not act on weak rigid blade, and utilizes sphere adaptive mechanism to realize adapting to this change when blade locating surface position changes always and ensureing that the fixture of locating did not occur blade.Belong to machining tool clamp art.
Background technology
Aircraft engine blade is owing to adopting thin-wall construction, and required precision is high, and processing rigidity is poor, when machining, very easily produces distortion, causes the phenomenons such as profile torsion, buckling deformation and dimension overproof.Except lathe geometry and motion control error, thermal deformation of machine tool error, these are the workpiece torsional deformation error and numerical control programming error etc. that cause of workpiece and the clamping error between fixture and lathe, cutter relieving distortion inaccuracy that between workpiece and fixture, the elastic deformation error of contact area, cutting force cause, residual stress mainly.
In the last few years, a large amount of research work was devoted to how to determine and was eliminated all these source of errors.On the one hand owing to being subject to the restriction of machine tool motion acceleration, blade processing region should be arranged near the centre of gyration as far as possible, and because blade rigid is poor, of a great variety, best fixture scheme must be formed by various one-tenth sleeve clamp, on the other hand, the machining deformation error that cutting force, residual stress etc. cause but just can not avoided only by improvement grinding machine structure design completely, thus greatly limit the application of high-precision numerical control machine.These contradictions are particularly remarkable in the process of machining thin-walled parts.
When existing fixture twists at blade, flexural deformation causes both-end benchmark inconsistent, clamping position also remains unchanged, thus makes blade suppress strength in process, causes new internal stress.The present invention makes blade carry out unstressed clamping in the raw, namely there is not serious mount stress between fixture and workpiece; And utilize eccentric stiffener to provide supplemental support, clamping machine tool power is not acted on blade.
Summary of the invention
1, object: the object of this invention is to provide a kind of self adaptation eccentric fixture, it is the unstressed self adaptation both-end clamping device utilizing eccentric stiffener to provide supplemental support.
2, technical scheme: in order to solve the problems of the technologies described above, the feature of the technical solution used in the present invention is: a kind of self adaptation eccentric fixture, and it comprises: pallet block is connected to clamp block fixture in clip base by eccentric fixture matrix, two structures identical but the pallet block that installation direction is contrary, two covers, one for being connected to the flexible connecting device on lathe by clip base; Position annexation between them is: a pair pallet block is arranged on eccentric fixture matrix locating surface, and pallet block center is coaxial with whole eccentric fixture matrix gyroaxis; Location-plate in clamp block fixture and pressure strip are arranged on eccentric fixture matrix locating surface both sides.Flexible connecting device is arranged on eccentric fixture matrix left positioner axle, and is provided with clamp block fixture between flexible connecting device and eccentric fixture matrix.Blade is arranged on two pallet blocks by both-end positioning datum, and whole chucking appliance system side is connected with machine tool rotary working table by flexible connecting device, and opposite side is held out against by the top direct centering of hydraulic pressure.
Described eccentric fixture matrix, is shown in Fig. 4, and be the half-open frame concave structure of a few word, it is mainly weak rigid thin wall's blade parts and provides supplemental support; Be provided with rectangular-shaped location-plate and pressure strip, pallet block accurately can be arranged on eccentric fixture matrix.Blade is arranged on two pallet blocks by both-end positioning datum, whole chucking appliance system side is connected with machine tool rotary working table by flexible connecting device, and opposite side tightly realizes the synchronous axial system of clip base and machine tool horizontal rotation of rotary table axle by hydraulic top pinnacle.
Described pallet block, it is the tetragonal symmetry square structure of both-end band projecting shaft, its symmetrical centre is by gyroaxis center, be connected with the axle at the two ends, left and right of the blade workpiece of horizontal positioned, can shifting in different lathe in company with blade or become other installment state at above-mentioned clip base up conversion, reinstalling as revolved turnback around axis of runner blade, be mainly used in the unstressed accurate locating self-adaption clamping of blade, it is by clamping nut, flexible joint bearing, axial compression tapered sleeve, spacing spacer shell, ball stop nut, square cotter, square tape spool locating piece and black box composition, position annexation between them is: be installed in axial compression tapered sleeve endoporus together with spacing spacer shell abuts against with flexible joint bearing outer ring end face, and make the flexible joint bearing conical surface and axial compression tapered sleeve endoporus front end cone match, axial compression tapered sleeve, spacing spacer shell, the assembly of flexible joint bearing composition is installed in the endoporus of square tape spool locating piece together, square cotter passes from the oblong aperture of the square hole square tape spool locating piece and axial compression tapered sleeve, ball stop nut is connected with axial compression tapered sleeve threads by another axle head aperture of square tape spool locating piece.This clamping nut is that endoporus side is provided with boss, and restriction flexible joint bearing departs from this pallet block; The outer surface of the outer ring of this flexible joint bearing is the conical surface, and Internal and external cycle is divided into very thin ring-type three valve structure respectively, and Main Function is clamping blade workpiece reference axis; This spacing spacer shell is sleeve type structure, is mainly the position limiting flexible joint bearing; Axial compression tapered sleeve, spacing spacer shell, ball stop nut, square tape spool locating piece composition compress tripping-gear, axial compression tapered sleeve wherein and spacing spacer shell are connected on pallet block body by square cotter, but the axial elongated slot on axial compression tapered sleeve allows that this is enclosed within ball stop nut and drives lower opposing body to make axial way moving.Forward and reverse rotary actuation of ball stop nut axially compresses tapered sleeve and advances in the axial direction or retreat, compressed by its inner end taper or loosen spherical bearing, reach the object compressing or loosen the axle journal on blade workpiece, in compaction process, flexible joint bearing only does radial motion, does not rotate and moves axially.Flexible joint bearing in two pallet blocks allows that the axle at two ends on blade realizes freely locating or adaptive location in out-of-alignment situation, guarantee that blade does not exist mount stress when being installed on fixture, this axial compression tapered sleeve is tubular flexible petal design, one end endoporus is the conical surface, one end is screw thread, and cut square elongated hole above, Main Function is for the flexible joint bearing of its inside is felt relieved and provides clamping force; This square cotter is cross section is tetragonal having strong market potential, and Main Function is by being connected with axial compression tapered sleeve by square tape spool locating piece, thus makes between the former and the latter without relatively rotating; This square tape spool locating piece is tetragonal symmetry and vertical square, and square both sides are with projecting shaft, and projecting shaft is positioned at square center, and long end projecting shaft has macropore, and Main Function is located on eccentric fixture matrix and firm grip pallet block; This ball stop nut is pagoda type hierarchic structure, and the little ladder in front end is provided with screw thread, and root has semicircular ball grooves, and Main Function by rotating screw thread, axial compression tapered sleeve to be slidably reciprocated in this pallet block hole.Square tape spool locating piece four sides on it is orthogonal, relative two sides is symmetrical mutually, four faces all can be used as locating surface, and benchmark is consistent, by upset, the conversion of blade four stations can be realized very easily, thus make the leaf basin of blade, blade back, inlet and outlet limit can at optimized cutting station.Pallet block is arranged in the middle of location-plate and pressure strip, and location-plate and pressure strip are strained by same bolt, and in cinching process, both, simultaneously to intermediary movements, realize self-centering.Complete to the Y-direction of pallet block 7 with clamp around the location of Z direction of rotation.Described black box is made up of sealed plastic sleeve, Dustproof plastic lid, and Dustproof plastic lid is placed in sealed plastic sleeve.Its effect prevents the chip in working angles from entering in pallet block 7.
Described flexible connecting device, by the revolution class flange arrangement of centering flange, adjustment flange and flexible anti-rotation spring combination, the centering of whole eccentric fixture matrix can be arranged on machine tool rotary working table, and only transmitting torque, improve the interchangeability that fixture uses on lathe.Centering circumference of flange there is the shoulder hole that four uniform, whole self adaptation eccentric fixture and machine tool rotary working table are fastenedly connected by these four shoulder holes by screw, centering flange, adjustment flange, flexible anti-rotation reed connect in order successively, before being unkitted adjustment flange, centering flange locating cone mandrel and clamp body fixation side centre bore are closely cooperated, measure the actual range between centering end face of flange and flexible anti-rotation reed end face, adjustment flange thickness is ground to above-mentioned size.Flexible anti-rotation reed has low axial stiffness and high rigid circumference, guarantees to transmit accuracy and the not interference of sharp navigation system with Double Tops of motion.
Described clamp block fixture realizes the location of two pallet blocks in clip base and fixing by have flexible flexible pressing plate (i.e. location-plate and pressure strip) and two groups of bolts of two pairs of consistent size; The natural distance of two flexible pressing plate locking states is slightly smaller than the width of pallet block, realized the automatic centering location of above-mentioned pallet matrix by the simultaneous equal distortion of two flexible pressing plates, this principle allows that the sectional dimension of two pallet blocks has certain difference; Blade is connected in clip base by pallet block, clip base is connected on machine tool horizontal turntable by a pair center hole and a set of flexible connecting device, thus realizes the rotary motion of blade with lathe horizontal revolving stage.This clamp block fixture is made up of eccentric fixture matrix, location-plate, pressure strip and bolt, nut, location-plate and pressure strip lay respectively at pallet block both sides and are arranged in clip base, it mainly pallet block is accurately located and firmly clamping in clip base.This location-plate which is provided with connecting through hole and drives fluted rectangle plate; This pressure strip which is provided with connecting through hole and drives fluted rectangle plate.
3, advantage and effect: major advantage of the present invention makes blade carry out unstressed clamping in the raw, namely there is not serious mount stress between fixture and workpiece; And utilize eccentric stiffener to provide supplemental support, clamping machine tool power is not acted on blade.Thus the bending torsional deflection that can effectively reduce in blade processing, improve blade processing precision.
Accompanying drawing explanation
Fig. 1 is self adaptation eccentric fixture structure chart of the present invention.
Fig. 2 a is pallet block structure cut-away view.
Fig. 2 b is pallet block structure axonometric drawing.
Fig. 3 a is flexible connecting device structure cut-away view.
Fig. 3 b is flexible connecting device axis of no-feathering mapping.
Fig. 4 is clamp block fixture schematic diagram.
Fig. 5 is explosive view of the present invention.
Label declaration:
1 is eccentric fixture matrix, and 2 is pressure strips, and 4 is location-plates.
3 is flexible connecting devices, and 3-1 is flexible anti-rotation reed, and 3-2 is adjustment flange, and 3-3 is centering flange.
5 is black boies, and 5-1 is sealed plastic sleeve, and 5-2 is Dustproof plastic lid.
6 is blades.
7 is pallet blocks, and 7-1 is clamping nut, and 7-2 is flexible joint bearing, and 7-3 is spacing spacer shell, and 7-4 is axial compression tapered sleeve, and 7-5 is square cotter, and 7-6 is square tape spool locating piece, and 7-7 is ball stop nut.
8 is shop bolts.
9 is short soket head cap screws, and 10 is long soket head cap screws.
Wherein m is jackscrew, and n is spherical steel ball.
D1 is carbide-tipped center, and D2 is fixture collective centering centre bore
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described.
A kind of self adaptation eccentric fixture, it comprises: eccentric fixture matrix 1, pallet block 7, flexible connecting device 3, location-plate 4, pressure strip 2, black box 5 and clamp block fixture; Position annexation between them is: a pair pallet block 7 is arranged on eccentric fixture matrix 1 locating surface, and pallet block 7 center is coaxial with whole clip base 1 gyroaxis; Location-plate 4 and pressure strip 2 are arranged on clip base 1 locating surface both sides, and black box 5 is arranged on pallet block 7 projecting shaft.Flexible connecting device 3 is arranged on clip base 1 left positioner axle, and is provided with clamp block fixture between flexible connecting device 3 and eccentric fixture matrix 1.Blade 6 is arranged on two pallet blocks 7 by both-end positioning datum, and whole chucking appliance system side is connected with machine tool rotary working table by flexible connecting device 3, and opposite side is held out against by the top direct centering of hydraulic pressure.
See Fig. 1, Fig. 2 a, b, Fig. 3 a, b and Fig. 4, a kind of self adaptation eccentric fixture, comprise eccentric fixture matrix 1, the pallet block 7 of mounted in pairs on described eccentric fixture matrix 1 plane of orientation, centering is arranged on the flexible connecting device 3 of described eccentric fixture matrix 1 side.Described eccentric fixture matrix 1 is provided with location-plate 4 and pressure strip 2, can pallet block 7 is accurately arranged on eccentric fixture matrix 1, is set with the positioning and locking device of both positioning and lockings between described flexible connecting device 3.Flexible connecting device 3 is the revolution class flange arrangements combined by centering flange 3-3, adjustment flange 3-2 and flexible anti-rotation reed 3-1, can whole eccentric fixture matrix centering be arranged on machine tool rotary working table, and only transmitting torque, improves the interchangeability that fixture uses on lathe.Pallet block 7, it is the tetragonal symmetry square structure of both-end band projecting shaft, its symmetrical centre is by gyroaxis center, be connected with the axle at the two ends, left and right of the blade workpiece of horizontal positioned, can shift in different lathe in company with blade or become other installment state at above-mentioned clip base up conversion, it is by clamping nut 7-1, flexible joint bearing 7-2, axial compression tapered sleeve 7-4, spacing spacer shell 7-3, ball stop nut 7-7, square cotter 7-5, square tape spool locating piece 7-6 and black box 5 form, position annexation between them is: be installed in axial compression tapered sleeve 7-4 endoporus together with spacing spacer shell 7-3 abuts against with flexible joint bearing 7-2 cycle surface, and make the flexible joint bearing 7-2 conical surface and axial compression tapered sleeve 7-4 endoporus front end cone match, axial compression tapered sleeve 7-4, spacing spacer shell 7-3, the assembly that flexible joint bearing 7-2 forms is installed in the endoporus of square tape spool locating piece 7-6 together, square cotter 7-5 passes from the oblong aperture of the square hole square tape spool locating piece 7-6 and axial compression tapered sleeve 7-4, ball stop nut 7-7 is connected with axial compression tapered sleeve 7-4 threads by square another axle head aperture of tape spool locating piece 7-6.This clamping nut 7-1 is that endoporus side is provided with boss, and restriction flexible joint bearing departs from this pallet block 7; The outer surface of the outer ring of this flexible joint bearing 7-2 is the conical surface, and Internal and external cycle is divided into very thin ring-type three valve structure respectively, and Main Function is clamping blade workpiece reference axis; This spacing spacer shell 7-3 is sleeve type structure, is mainly the position limiting flexible joint bearing 7-2; Axial compression tapered sleeve 7-4, spacing spacer shell 7-3, ball stop nut 7-6, square tape spool locating piece 7-6 form compression tripping-gear, axial compression tapered sleeve 7-4 wherein and spacing spacer shell 7-3 is connected on pallet block 7 body by square cotter 7-5, but the axial elongated slot on axial compression tapered sleeve 7-4 allows that this is enclosed within ball stop nut 7-7 and drives lower opposing body to make axial way moving.Forward and reverse rotary actuation of ball stop nut 7-7 axially compresses tapered sleeve and advances along 7-4 axis direction or retreat, compressed by its inner end taper or loosen spherical bearing, reach the object compressing or loosen the axle journal on blade workpiece, in compaction process, flexible joint bearing 7-2 only does radial motion, does not rotate and moves axially.Flexible joint bearing 7-2 in two pallet blocks 7 allows that the axle at two ends on blade realizes freely locating or adaptive location in out-of-alignment situation, guarantee that blade 6 does not exist mount stress when being installed on fixture, this axial compression tapered sleeve 7-4 is tubular flexible petal design, one end endoporus is the conical surface, one end is screw thread, and cut square elongated hole above, Main Function is for the flexible joint bearing 7-2 of its inside feels relieved and provides clamping force; This square cotter 7-5 is cross section is tetragonal having strong market potential, and Main Function is by being connected with axial compression tapered sleeve 7-4 by square tape spool locating piece 7-6, thus makes between the former and the latter without relatively rotating; This square tape spool locating piece 7-6 is tetragonal symmetry and vertical square, and square both sides are with projecting shaft, and projecting shaft is positioned at square center, and long end projecting shaft has macropore, and Main Function is located on eccentric fixture matrix 1 and firm grip pallet block 7; This ball stop nut 7-7 is pagoda type hierarchic structure, and the little ladder in front end is provided with screw thread, and root has semicircular ball grooves, and Main Function by rotating screw thread, axial compression tapered sleeve 7-4 to be slidably reciprocated in this pallet block 7 hole.Square tape spool locating piece 7-6 four sides on it is orthogonal, relative two sides is symmetrical mutually, four faces all can be used as locating surface, and benchmark is consistent, by upset, the conversion of blade four stations can be realized very easily, thus make the leaf basin of blade 6, blade back, inlet and outlet limit can at optimized cutting station.It is middle with pressure strip 2 that pallet block 7 is arranged on location-plate 4, and location-plate 4 and pressure strip 2 are strained by same bolt, and in cinching process, both, simultaneously to intermediary movements, realize self-centering.Complete to the Y-direction of pallet block 7 with clamp around the location of Z direction of rotation.Described black box 5 is made up of sealed plastic sleeve 5-1, Dustproof plastic lid 5-2, and Dustproof plastic lid 5-2 is placed in sealed plastic sleeve 5-1.Its effect prevents the chip in working angles from entering in pallet block 7.
For certain h type engine h stator double blade shafts 6, blade 6 two end axles is its machining benchmark, but in process, blade can produce flexural deformation to leaf basin direction.After clamping, thick fine finishining time processing, its this internal stress distortion caused is difficult to eliminate.But if we release internal stress in process, this distortion will improve greatly.In addition, due to the existence of blade 6 clamping both-end coaxiality error, make blade 6 in clamping, suppress strength, there is larger clamping stress, also cause the surface contour error of blade 6 to a certain extent.Device provided by the present invention can head it off.
As shown in Figure 1, blade 6 is arranged on two pallet blocks 7 by both-end positioning datum, and whole chucking appliance system side is connected with machine tool rotary working table by flexible connecting device 3, and opposite side is tight by hydraulic top pinnacle.
Described pallet block 7, square locating piece four sides on it is orthogonal, relative two sides is symmetrical mutually, four faces all can be used as locating surface, and benchmark is consistent, by upset, the conversion of blade four stations can be realized very easily, thus make the leaf basin of blade 6, blade back, inlet and outlet limit can at optimized cutting station.
It is middle with pressure strip 2 that described pallet block 7 is arranged on location-plate 4, and location-plate 4 and pressure strip 2 are strained by bolt simultaneously, and in cinching process, both, simultaneously to intermediary movements, realize self-centering.Complete square positioning component Y-direction and clamp around the location of Z direction of rotation.
As shown in Figure 1, utilize eccentric matrix 1 to do supplemental support and make clamping machine tool power not act on weak rigid blade, and utilize pallet block 7 to realize adapting to this change when blade locating surface position changes always.
Embodiment described above is in order to the present invention is described, but not in order to limit the present invention.Scope of invention is limited by the scope of attached claim.

Claims (1)

1. a self adaptation eccentric fixture device, is characterized in that: this device comprises an eccentric fixture matrix, two structures identical but the pallet block that installation direction is contrary, two covers and pallet block is connected to clamp block fixture in clip base and one for clip base being connected to the flexible connecting device on lathe; A pair pallet block is arranged on eccentric fixture matrix locating surface, and pallet block center is coaxial with whole eccentric fixture matrix gyroaxis; Location-plate in clamp block fixture and pressure strip are arranged on eccentric fixture matrix locating surface both sides; Flexible connecting device is arranged on eccentric fixture matrix left positioner axle, and is provided with clamp block fixture between flexible connecting device and eccentric fixture matrix; Blade is arranged on two pallet blocks by both-end positioning datum, and whole chucking appliance system side is connected with machine tool rotary working table by flexible connecting device, and opposite side is held out against by the top direct centering of hydraulic pressure;
Described eccentric fixture matrix is the half-open frame concave structure of a few word, and it provides supplemental support for weak rigid thin wall's blade parts; Be provided with rectangular-shaped location-plate and pressure strip, can pallet block be accurately arranged on eccentric fixture matrix; Blade is arranged on two pallet blocks by both-end positioning datum, whole chucking appliance system side is connected with machine tool rotary working table by flexible connecting device, and opposite side tightly realizes the synchronous axial system of clip base and machine tool horizontal rotation of rotary table axle by hydraulic top pinnacle;
Described pallet block, it is the tetragonal symmetry square structure of both-end band projecting shaft, its symmetrical centre is by gyroaxis center, be connected with the axle at the two ends, left and right of the blade workpiece of horizontal positioned, shift in different lathe or become other installment state at above-mentioned clip base up conversion in company with blade, for the unstressed accurate locating self-adaption clamping of blade, it is by clamping nut, flexible joint bearing, axial compression tapered sleeve, spacing spacer shell, ball stop nut, square cotter, square tape spool locating piece and black box composition, be installed in axial compression tapered sleeve endoporus together with spacing spacer shell abuts against with flexible joint bearing outer ring end face, and make the flexible joint bearing conical surface and axial compression tapered sleeve endoporus front end cone match, axial compression tapered sleeve, spacing spacer shell, the assembly of flexible joint bearing composition is installed in the endoporus of square tape spool locating piece together, square cotter passes from the oblong aperture of the square hole square tape spool locating piece and axial compression tapered sleeve, ball stop nut is connected with axial compression tapered sleeve threads by another axle head aperture of square tape spool locating piece, this clamping nut is that endoporus side is provided with boss, and restriction flexible joint bearing departs from this pallet block, the outer surface of the outer ring of this flexible joint bearing is the conical surface, and Internal and external cycle is divided into very thin ring-type three valve structure respectively, and its effect is clamping blade workpiece reference axis, this spacing spacer shell is sleeve type structure, for limiting the position of flexible joint bearing, axial compression tapered sleeve, spacing spacer shell, ball stop nut, square tape spool locating piece composition compress tripping-gear, axial compression tapered sleeve wherein and spacing spacer shell are connected on servo-actuated clamp block body by square cotter, but the axial elongated slot on axial compression tapered sleeve allows that axial compression tapered sleeve opposing body under ball stop nut drives makes axial way moving, forward and reverse rotary actuation of ball stop nut axially compresses tapered sleeve and advances in the axial direction or retreat, compressed by its inner end taper or loosen flexible joint bearing, reach the object compressing or loosen the axle journal on blade workpiece, in compaction process, flexible joint bearing only does radial motion, does not rotate and moves axially, flexible joint bearing in two pallet blocks allows that the axle at two ends on blade realizes freely locating or adaptive location in out-of-alignment situation, guarantee that blade does not exist mount stress when being installed on fixture, this axial compression tapered sleeve is tubular flexible petal design, one end endoporus is the conical surface, one end is screw thread, and cut square elongated hole above, its effect is for the flexible joint bearing of its inside is felt relieved and provides clamping force, this square cotter is cross section is tetragonal having strong market potential, and its effect is by being connected with axial compression tapered sleeve by square tape spool locating piece, thus makes between the former and the latter without relatively rotating, this square tape spool locating piece is tetragonal symmetry and vertical square, and square both sides are with projecting shaft, and projecting shaft is positioned at square center, and long end projecting shaft has macropore, and its effect is located on eccentric fixture matrix and firm grip pallet block, this ball stop nut is pagoda type hierarchic structure, and the little ladder in front end is provided with screw thread, and root has semicircular ball grooves, and its effect by rotating screw thread, axial compression tapered sleeve is slidably reciprocated in this pallet block hole, square tape spool locating piece four sides on it is orthogonal, and relative two sides is symmetrical mutually, and four faces all can be used as locating surface, and benchmark is consistent, by upset, realize the conversion of blade four stations, thus make the leaf basin of blade, blade back, inlet and outlet limit can at optimized cutting station, pallet block is arranged in the middle of location-plate and pressure strip, and location-plate and pressure strip are strained by same bolt, and in cinching process, both, simultaneously to intermediary movements, realize self-centering, completes square positioning component Y-direction and clamps around the location of Z direction of rotation, sealing assembly is made up of sealed plastic sleeve, Dustproof plastic lid, and Dustproof plastic lid is placed in sealed plastic sleeve, and its effect prevents the chip in working angles from entering in square positioning component,
Described flexible connecting device, by the revolution class flange arrangement of centering flange, adjustment flange and flexible anti-rotation spring combination, the centering of whole eccentric fixture matrix is arranged on machine tool rotary working table, and only transmitting torque, improve the interchangeability that fixture uses on lathe; Centering circumference of flange there is the shoulder hole that four uniform, whole self adaptation eccentric fixture and machine tool rotary working table are fastenedly connected by these four shoulder holes by screw, centering flange, adjustment flange, flexible anti-rotation reed connect in order successively, before being unkitted adjustment flange, centering flange locating cone mandrel and clamp body fixation side centre bore are closely cooperated, measure the actual range between centering end face of flange and flexible anti-rotation reed end face, adjustment flange thickness is ground to above-mentioned size; Flexible anti-rotation reed has low axial stiffness and high rigid circumference, guarantees to transmit accuracy and the not interference of sharp navigation system with Double Tops of motion;
Described clamp block fixture realizes the location of two pallet blocks in clip base and fixing by two to flexible pressing plate and two groups of bolts, and often pair of flexible pressing plate all comprises a location-plate and a pressure strip; It is made up of eccentric fixture matrix, location-plate, pressure strip and bolt, nut, and location-plate and pressure strip lay respectively at pallet block both sides and be arranged in clip base; This location-plate which is provided with connecting through hole and drives fluted rectangle plate; This pressure strip which is provided with connecting through hole and drives fluted rectangle plate.
CN201210586642.5A 2012-12-28 2012-12-28 Self-adaptive eccentric fixture CN103009155B (en)

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