CN103111877A - Stacking shaft positioning method and device of vane molded surface - Google Patents
Stacking shaft positioning method and device of vane molded surface Download PDFInfo
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- CN103111877A CN103111877A CN2012105808078A CN201210580807A CN103111877A CN 103111877 A CN103111877 A CN 103111877A CN 2012105808078 A CN2012105808078 A CN 2012105808078A CN 201210580807 A CN201210580807 A CN 201210580807A CN 103111877 A CN103111877 A CN 103111877A
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Abstract
The invention belongs to the field of machining and relates to a method and a device of detecting and positioning vane and blade molded surfaces and keeping positioning status. A traditional six points positioning method of fixed points exists the poignant contradiction which improved positioning accuracy depends on the accuracy of a positioned vane. A new idea jumps out of a restriction. According to requirements of a vane picture, a plurality of sample plate assemblies which can move separately, wherein 'linear contour degree' conforms to requirements, and blade profile stacking points and reversed errors can be controlled in a tolerance, and special space is created together. The vane can find an appropriated place in the special space according to errors of the vane. Detection and positioning purposes are achieved, and three examples are provided aiming at different vanes.
Description
The invention belongs to field of machining, relate to the method and apparatus that blade blade profile is detected, locates and keep positioning states.
Modern a large amount of blade, in order to improve the performance of engine, structure is very complicated.Again in order to guarantee the integrality of blade wall thickness and blade surface quality, do not wish to destroy blade surface, existing blank surface and no longer stay allowance, or just do some finishing in the margin of tolerance may.And blade blank during fabrication, and in complicated, very long technical process, various factors complicated and changeable, make blade produce error.The characteristics of these errors are, on this space curved surface body of blade, each point is different and difference is very large with respect to the error amount of theoretical value.The error that these are numerous and disorderly after decomposing conclusion, is divided into the form error of blade profile and the site error of blade profile.Control use to the blade profile shape is not shown with the line profile kilsyth basalt of benchmark, is called the blade profile profile tolerance.The site error of blade profile comprises the site error of long-pending folded point and the torsional error of blade profile.The position error of long-pending folded point is that long-pending folded some physical location is to the distance of its ideal position.The torsional error of blade profile is the angular position error of blade profile.Reverse tolerance δ a and be the desirable blade profile long-pending folded axle that unrolls and counterclockwise rotate 1/2 δ a angle, rotate clockwise the angle value that 1/2 δ a dihedral becomes.
The design basis of blade is with tenon, and installing plate is Foundation, i.e. the center line of blade.Blade is without the following process of the blank of surplus or few surplus blade, and exactly in order to guarantee take the actual profile of blade as the basis, the in esse long-pending axle of folding overlaps with blade centreline.With the accuracy of blade profile position after the assurance blades installation, thus the performance of assurance engine.
The manufacture level that is limited to blank is suffered from and is put forward high-precision difficulty, and for certain qualification rate is arranged, blank production division has almost used up the tolerance value of stipulating on blade design figure when the blank acceptance inspeciton.After the processing of tenon, installing plate, then it is very little to locate to revise the remaining of blade error with tenon, installing plate, there is no the route of retreat.Increase difficulty to following process.Whether accurate, just become the important step that guarantees final precision if namely locating with the blade profile.
Traditional localization method is fixing with six positions, or the profile locating piece that is equivalent to six points is eliminated the six-freedom degree of blade, method with mechanical compaction makes positioning states keep getting off again, or contains blade raising clamping force with media such as low-melting alloys again.Resist external force.Or with the mechanics method for automatically positioning of the Chinese 86107876 described blade profiles of patent, or the U.S.'s 3856292 described methods of patent are eliminated the six-freedom degree of blade.
Six point locations are most basic principles in theory of mechanics.Select the position of rational six anchor points, just guarantee a rigid body, eliminated six-freedom degree, the positioning stablity good reproducibility.Guarantee positioning accuracy, also wanting the guarantee of other conditions is prerequisite.Require to have certain flatness as the plane that is used for the location, with the perpendicularity on other planes, equality degree etc.Cylinder there is cylindricity, the requirements such as concentricity.Their precision is often than the high order of magnitude of positioning requirements.
No-residual length leaf, traditional localization method are to adopt six point locations, and its selected locating surface is crude hair benchmark, and its form error, site error are all even larger at ± 0.1～0 ± 0.2 millimeter.During the production division design of technological arrangement of blade, the anchor point of selection is all the theoretical value by the anchor point of drawing regulation.With the blade of various errors, during clamping, force blade to fall on anchor point in fixture.Make blade each cross section be the long-pending folded axle of the objective reality on basis, the fixture center line that is the basis with theoretical value by six anchor points departs from.Be the error of anchor point on blade, transfer to other positions of blade.Due to the uncertainty of direction of error, making originally, qualified blade becomes defective.Can't judge exactly whether positioning states is reasonable before tenon, installing plate processing, whether qualifiedly process rear blade in the future.
The purpose of this invention is to provide a kind of new blade profile detection and localization method and the isolated plant that makes in this way.Traditional localization method is first to set a fixing anchor point of cover, forces blade " seats " there, and finally the attitude of " seat " is that what no one clear.New principle of the present invention is the requirement according to blade product figure, builds a special space.Allow blade according to self error, oneself find a suitable position in that special space.There are at random six anchor points to contact with that special space on blade, reach the requirement of location.This method has changed the theory of traditional localization method fully, can take full advantage of like this error requirements that allows on blade product figure.Fully guaranteed the final required precision of blade when improving qualification rate.The present invention will be to the final inspection of blade blank and the required location complete unity of following process together, and it is the positioner of verifying attachment and following process.Blank production division and following process department can be with same devices.Overcome the series of problems that two departments bring due to method and operative norm disunity.Isolated plant of the present invention is placed in rational position with blade, and maintains.Can also directly demonstrate positioning states, whether qualifiedly differentiate blade.Can also dwindle the tolerance range that drawing allows according to the actual conditions of blade precision, further improve final precision of blades.
Needs according to processing can arrange at the different parts of blade abundant unsteady aiding support point, or the low-melting alloy piece contains blade, in case add the distortion in man-hour or destroy positioning states.
Technology technical scheme of the present invention;
1). analyze the structure of blade and the situation of reality, the rigidity of blade Y-direction is little more than directions X, makes the distortion of blade mainly occur in Y-direction and around the torsional deflection of Z axis.Consider again the reasonability that engineering is processed, do not consider the displacement error of directions X and around the impact on positioning accuracy of the torsional error of Y-axis.Select a bit on blade root (tenon) listrium or blade tip listrium, or get the mean value of blade root, blade tip anchor point, first eliminate according to the coordinate system of Fig. 1 regulation the free degree that moves along Z axis.
2). choose several detection sectional plane on blade figure, chosen detection sectional plane is designed to comprise the model of blade back, leaf box molded line by " line profile degree " upper poor requirement.These two models can open or be closed into whole cam group component relatively.Press in each comfortable same coordinate system of the cam group component in several cross sections in the plane of the cross-sectional distance that drawing stipulates, can rotate in the margin of tolerance around Z axis; Its long-pending folded point can move freely in the Tolerance of Degree of position scope of long-pending folded point.
3). the blade that is detected, locates, when packing this device into, rotates around Z axis in the free degree that each comfortable tolerance of the cam group component in each cross section allows, move in the plane at X, Y, finally find a satisfactory position to the blade with error.After blade is positioned, by clamp mechanism, the position of blade is maintained.
4). circuitous to underproof blade, two kinds of situations may be arranged; The one, some cam group component closures are not in place.The 2nd, though all cam group components can closure put in place, some cross sections " line profile degree " is defective, shows that the gap between blade and model surpasses permissible value.As seen this positioner is located complete unity together to final inspection and the following process of blade blank.
5). the error of most blades does not reach the extreme value of allowable error, and it also has activity space in various degree in this special space as the location.In order further to improve the final precision of blade, can according to the actual conditions of a collection of blade error, dwindle the tolerance value of blade site error.When blade position of related features value is reduced to zero, also have activity space in the space of the online profile tolerance of blade, illustrate that the site error of blade is less than " line profile degree " tolerance value.In order to improve again the final precision of blade, can dwindle the tolerance value of " line profile degree ".As leaf basin exhaust limit, the gap of 0.2 millimeter is arranged, the corresponding surface of blade back is very close to each other, can be less than or equal to the clearance gauge of 0.1 millimeter in the exhaust frontier fortress of blade back.Make the leaf pelvic surface of sacrum, the equal beach of error on leaf back both sides.Make blade more near ideal position.Above-mentioned adjustment is the most effective to carry out on blade root, blade tip cross section.Because it can affect the precision of location.
6). visible " long-pending folded axle positioning mode " than six traditional point location methods, can not only understand the positioning states of blade at any time, and be clearer and more definite, more secure to the approach that improves the blade positioning accuracy, makes the blade that contains different errors can reach optimum state.
Embodiment one:
The embodiment one of method and apparatus of the present invention elaborates by reference to the accompanying drawings.
Fig. 1,2. total figure schematic diagram of the long-pending folded axle positioning mode embodiment of blade profile.
Fig. 3. cam group component 16, the schematic diagram of model open mode.
Fig. 4. partial twist mechanism, the schematic diagram of its structure and relieving, two states of pinning.
Fig. 5. the schematic diagram of two states is decontroled, pinned to cam group component offsetting mechanism.
Fig. 6. blade inlet edge, posterior border position degree calliper schematic diagram.
Fig. 7. the location structure schematic diagram of blade tip cross section, blade root cross section leading edge.
Press location and the blade profile verifying attachment of " the long-pending folded axle positioning mode " shown in Fig. 1,2.It is by several cam group components 16, and reference seat 20 is amassed folded axle check rod 85 compositions such as grade.
The molded line of the cam group component 16 in each cross section meets respectively " line profile degree " upper poor requirement.As previously described, because do not consider long-pending folded point in the site error of directions X, the molded line model in blade root, blade tip cross section as shown in Figure 7.At leading edge, one section with leading edge theoretical leading edge tangent straightway parallel with Y-axis is arranged.Other cross sections are by the holotype face, and the theory shaped wire that comprises front and rear edge is emitted difference and got final product.There is one section take the origin of coordinates as the center of circle on the molded line of blade back or leaf basin, the circular arc that diameter and folded axle check rod 85 match.
Said cam group component 16 has respectively one by calliper 12 at leading edge, the trailing edge of model, and the front and rear edge position degree calliper that clamp 25 springs 23 form is measured whether super allowance below nominal size of front and rear edge.
Said cam group component 16 has a groove with patterns 2 precision-fit on its model seat 1, its guarantees that model 2,3 moves in the plane at X, Y.Two straight pins 6,7 are arranged on model seat 1, and straight pin 6,7 origins of coordinates at X, Y are on the same circumference in the center of circle.Soleplate 19 has two slots with straight pin 6,7 precision-fit, and slot and straight pin 6,7 are on same circumference.It and straight pin 6,7 guarantee can relatively rotate in the margin of tolerance at partial twist angle between soleplate 19 and model seat 1 in the gap of circumferencial direction.
A hole with steel ball 24 precision-fit is arranged on model seat 1 as shown in Figure 4, and the screw 17 that can hold out against steel ball 24 or unclamp.Hole coaxial line on a hole it and model seat 1 is arranged on soleplate 19.The diameter in this hole is less by 5 percent to ten than steel ball 24.As shown in Figure 4, steel ball 24 is held out against state, and model seat 1 and soleplate 19 are relatively fixing.Be that patterns 2 can not be rotated, making the partial twist angle is zero.When steel ball 24 is totally released, patterns 2 can be rotated in the partial twist error range.When steel ball is between the two, different steel balls positions has just changed the amount of deflection of patterns, dwindles the tolerance value of partial twist.Further improve the positioning accuracy of blade.
If displacement controll block 13 is fixed between above-mentioned two states, namely tapering 15 enters in the T-shaped groove of patterns 2, the amount of movement that makes model seat 2 enters along with tapering 15 what and change.Can dwindle the tolerance value of skew like this, further improve positioning accuracy.Step F in Fig. 5 left view controls the amount of moving of compiling.
As Fig. 1, there are the square toes with foundation base 20 precision-fit to make cam group component 16 on soleplate shown in 2 19, accurately navigate on unified coordinate system.
The anchor point of the Z-direction of blade, can select 21,22 one of them anchor point that fix as shown in Figure 2.For improving the fairing of gas channel, 21,22 anchor points can be regulated automatically along with the difference of blade length, and blade is on the symmetrical centre of 21,22 anchor points all the time.
The long-pending folded axle check rod 85 of blade is blade theoretical centerlines of setting up from reference seat 20.Be used for detecting cam group component 16, the precision after installation.As Fig. 4, control skew shown in Figure 5, the mechanism of torsional capacity checks whether the circular arc of model the preceding paragraph center of circle on the blade center line fits fully with check rod 85 when nought state.If the defective relative position that can adjust cam group component 16 and reference seat 20.The diameter of check rod 85 is decided according to the size of blade profile, as long as guarantee to have on leaf basin or blade back model one section sufficiently long circular arc to be convenient to check.Change blade greatly from blade root to the blade tip blade profile thickness, check rod 85 is Step Shafts.
When positioner of the present invention, when being used for the following process of blade, can select several to compress point, blade is fixed in chosen special space.In order further to improve the external force of opposing trailing edge processing, can also set up auxiliary float positioning device at suitable position.Metal fillings when preventing following process, cutting fluid etc. are polluted positioner.Can the supplementary protection cover.
When this positioner was used for the check blade, its operating process was: the model 3 of first opening as shown in Figure 3 each cross section.Can begin from the blade root cross section closed model 3 to short blade, the cross section checks " line profile degree " one by one.After the cross section placate that will check long blade was loaded onto blade more, the model 3 in the blade root of can first closing, blade tip cross section was the first Primary Location of blade.Then closed model and inspection " line profile degree " are convenient to observe so one by one.Front and rear edges position degree calliper is exit status under spring action at ordinary times, and as long as the used time is toward last pushing away.When positioner was used for following process, basic operation was the same.In order to make blade be positioned at the better state of precision, according to the precision situation of the blade tolerance range of contracted position error correspondingly.Select the most rational space with clamp mechanism, blade to be fixed on positioner at last.
Embodiment two:
For the long real core blade of blade, its rigidity is poor, the blade of two ends band listrium particularly, and " the long-pending folded axle positioning mode " of blade profile can also be designed to the positioner as shown in Fig. 8,9,10,11.
Fig. 8. total figure schematic diagram of the long-pending folded positioning mode profile locating piece embodiment of blade profile.
Fig. 9. the layout of auxiliary positioning and structural representation thereof.
Figure 10. auxiliary setting and the structural representation thereof that compresses positioning component.
Figure 11. contain the positioning clamping device of low-melting alloy color tolerance piece.
This positioner is characterized in that: it is by meeting two profile locating pieces 26,27 " line profile degree " requirement or continuous according to the profile of the actual conditions particular design of testing, auxiliary positioning assembly 32, assisting compression positioning component 37, alignment pin 31, housing screw 30 to form.
Above-mentioned profile locating piece 26,27 makes up rear batallion and causes to meet the special space that blade design figure requires, and its geometric center is exactly the long-pending folded axle of blade.Vertical, parallel profile, can be used as the basis, location that blade was processed in follow-up minute mutually.
Above-mentioned profile locating piece 26,27 its characteristics are: respectively there is the boss 28,29 of individual high 5～15 millimeters its one or both ends.Table top is profile, and is consistent with the listrium profile on the blade that is positioned respectively.The peripheral size of the periphery of boss and corresponding listrium, consistent when being in the lower deviation state.Table top 28, the 29th, the positioning datum of blade length direction, their distance is be positioned ideal value or the lower difference of blade and blade height degree.When playing positioning action, boss face checked form error and the blade length of listrium.
External force in order to bear following process the time is provided with several auxiliary positioning sub-assemblies 32 at boss 28,29 peripheries as shown in Figure 9, and it is comprised of eccentric shaft 33, spring 34, clamp-screw 35, stop screw 36.Unclamp clamp-screw 35, eccentric shaft 33 during use, under spring 34 effects, controlling to be moved at stop screw needs the position.Eccentric rotation axis makes it touch locating surface, and tightens up with clamp-screw 35.Shown in 41.The used time does not return eccentric shaft 33 and fix shown in 42.To be processed is allowed out.The offset of eccentric shaft 33 will satisfy the face of being positioned at the blank state, or after being worked into size, can touch locating surface, guarantees to play the effect of bearing external force.
Blade is packed into after positioner, automatically adjusts in the remaining space of " line profile degree " with the blade of certain position error.When the site error in blade each cross section arrives greatly the remaining space of " line profile degree " when large not, under the clamping of two location profile pieces 26,27, make blade produce certain strain, make simultaneously blade be subject to corresponding clamping force in positioner, make blade keep positioning states.This strain is not for strengthening blade site error originally.When blade will produce permanent deformation or affect metallurgical quality with this localization method, need again heat treated situation just should not use this positioner.Or enlarge the special space of locating by test, make it not produce permanent deformation and can satisfy the required precision of location again.
Can also be movable in the remaining space of blade " line profile degree " after the blade that the blade site error is little, the positioner of packing into, the explanation positioning states do not maintain.In order to overcome this situation, positioner has added auxiliary compression positioning component 37 as shown in figure 10.It is by push rod 38, spring 39 that rigidity is consistent, and adjustment screw 40 forms.This auxiliary compression positioning component as shown in figure 10, is paired configuration, makes it produce the basic power that equates to blade, and the opposite direction of power.Make the long-pending folded point of blade more near ideal value under the effect of paired forces, further improve the positional precision of blade.Producing simultaneously clamping force makes blade keep the state of location.The size of this clamping force can be regulated by adjustment screw 40 according to the actual needs of use.
The external force that will bear during to the blade following process is larger, when auxiliary locator should not arrange again, embodiment two described two that meet that " line profile degree " require or according to continuous two profile locating pieces 26,27 structures that can also be designed to as shown in figure 11 of profile of the actual conditions particular design of test, it is characterized in that: bear the size of external force during according to the structure of blade and following process, on above-mentioned profile piece, the die cavity that some places can hold the low-melting alloy with the cold characteristic that rises is set.A cast gate 53 and exhaust outlet 52 are arranged on die joint for the ease of die sinking.For the ease of the removing of low-melting alloy piece later on, the low-melting alloy piece of blade back leaf boxlike is as far as possible little in the connection area on inlet and outlet limit.The thickness of low-melting alloy piece will guarantee to water full and produce enough package powers, generally is not less than 10 millimeters.
The use of embodiment two: do not re-use so the positioner of embodiment two has the described detection and location device of embodiment one, complete measuring ability to use the blade of this positioner first to detect qualified blade with other detection means.Compare with embodiment one, it is simple in structure, for following process has been prepared complete positioning datum and enough supported the aided positioning system of circuitous processing external force.Have very strong practicality, enlarged the enforcement approach of " the long-pending folded axle positioning mode " of blade profile.
Embodiment three:
The accompanying drawing of embodiment three combinations of method and apparatus of the present invention elaborates.
Figure 12. the total figure schematic diagram of cross section combiner.
Figure 13. the schematic diagram of cross section combiner blade back, leaf basin model open mode.
Figure 14. structure and the operating position figure of the mechanism that zero-bit limits and compresses.
Figure 15. the assembly relation of cross section combiner, low-melting alloy square chest and large pedestal.
Figure 16. after blade is positioned, the assembly relation that blade and low-melting alloy square chest are sat at benchmark.
Figure 17. the low-melting alloy square chest, after being removed, reveals by the blade back locating piece schematic diagram of leaf back.
Figure 18. the structural representation of low-melting alloy square chest.
Embodiments of the invention three are roomy for string, and each cross section relative torsion is large, and the cross section profile changes large-scale blades greatly, and location and the checkout gear of applicable a kind of blade profile " long-pending folded axle positioning mode ".It is by large pedestal 78,79 several cross section combiner 76,77 several low-melting alloy square chest 80 compositions such as grade.
Each cross section combiner; , tangential benchmark fit by cam group sat 66,68 zero-bits and limited and hold-down mechanism 61, and model displacement checkout gear 70, model are sat torsional capacity checkout gear 69 and formed.
The cam group in each cross section is fit.Because the relative torsion in this class blade each cross section is large, blade back, leaf basin model are at tangential somatotype, and moving direction is tangential vertical with this cross section.The molded line of the fit model of cam group meets respectively the requirement of the upper difference of " line profile degree ".Blade back model 58, leaf basin model 57 sits 55 with the model displacement respectively, 56 precision-fit, and by the connection of axle 60, model 58,57 being rotated around axle 60, the model displacement sits 55,56 reverse plate 62 with model, precision-fit is also passed through square key 59 and the square groove corresponding with it, moves in same plane with model 57,58.Model reverses plate 62 lower ends and soleplate 63 precision-fit.Model reverses on plate 62 has two straight pins 64,65, straight pin 64,65 origins of coordinates at the blade design coordinate system are on the same circumference in the center of circle, and two slots with straight pin 64,65 precision-fit are arranged on soleplate 63, slot and straight pin 64,65 are on same circumference.It and straight pin 64,65 guarantee that in the gap of circumferencial direction model reverses plate 62 and relatively moves in the margin of tolerance at partial twist angle with model displacement seat 55,56.A square groove is arranged on the central plane of soleplate 63 as shown in figure 12.
Zero-bit limit and hold-down mechanism as shown in figure 14, it is by pressing plate 61, the straight pin 73,74 that length is identical with pressing plate 61 width, screw 75 forms, there is an elongated slot pressing plate 61 centres.
When the zero-bit state of cam group zoarium referred to that blade back, leaf basin model are fully closed, the cross section molded line was in the position of the allowance below nominal size of " line profile degree ".The torsion angle of cross section molded line is zero.It is coplanar at cylinder 73 places to be that shifting seat 55,56 reverses plates 62.Reverse plate 62, soleplate 63 coplanar at the V-type groove at cylinder 74 places., compress simultaneously 73,74 places and all be in coplanar state during as the right figure of Figure 14 when the pressing plate 61 on blade back, leaf basin both sides, guarantee at the zero-bit state.When pressing plate 61 during in Figure 14 medial view 74 cylinders be pressed on 72 that reverse plate 62,73, cylinder is pressed in displacement and sits on 55,56, promotes model 57,58 closures and puts in place, reverses relatively moving of plate 62 and soleplate 63 but do not affect.As shown in pressing plate 61 90-degree rotations figure as left in Figure 14, make the cam group component be in as shown in figure 13 the state of opening fully.
For side-play amount and the torsional error of measuring profile reality, be provided with respectively displacement transducer 69,70 as shown in figure 12.
Above-mentioned cam group is fit, is positioned on three alignment pins 67 of tangential benchmark seat 66, recycles fixed head 68 just individual cross section combiner 76 ..., 77 grades are combined on large pedestal 78.The location, the checkout gear that form blade.
When this blade locating and detecting device is used in adding of blade tenon, installing plate or repairs the blade profile, in order to resist large external force, can adopt as Figure 16 the low-melting alloy square chest 80 shown in 17,18.
The coordinate system design that the low-melting alloy square chest is set up according to coordinate system or the locating and detecting device itself of blade is a kind of as Figure 16,17,18 square chest.Square chest divides mould to become 81,82 two-half dies on the inlet and outlet limit of blade at directions X.Location and combination clamp mechanism are arranged between 81,82.The profile at square chest two ends 86,87 blade profile corresponding with it respectively is complementary.Gap between profile 86,87 and blade can not hinder the blade adjustment, obturages when being conducive to again the low-melting alloy casting.The die cavity thickness that can hold low-melting alloy in square chest generally is not less than 10 millimeters.The moulding of die cavity will be conducive to the alloy block depanning, the elimination after being convenient on blade.After the square chest combination, 83, one exhaust outlets 84 of a casting gate are arranged on square chest.
When positioner is used for the low-melting alloy square chest can and being set take finishing blade profile during as purpose on tenon, blade tip or the process area that specially arranges on blade.Remove as shown in figure 17 upper mold section, reveal surface to be machined.When positioner is used for tenon, when installing plate is processed as purpose, the low-melting alloy square chest is set on blade and process area.During use, low-melting alloy square chest 80 navigates to respectively on large base 78, removes upper mold section 82, waits blade to pack into, after completing adjustment, detection, casting low-melting alloy.Blade installs to another one with square chest 80 and locates on base 79, and this benchmark to blade is transferred to new location and sat on 79, completes following process with 79.
Claims (5)
1. the detection of a blade blade profile, the position of point location fixed blade length direction is used in location and keep the method for positioning states at first, eliminates the one degree of freedom of blade, detects blade profile " line profile degree " with the profile model, it is characterized in that:
(1). choose several detection sectional plane on blade figure, chosen detection sectional plane is by " line profile degree " upper poor requirement, be designed to comprise the model of blade back, leaf basin molded line, these two models can open or be closed into whole cam group component relatively, press in each comfortable same coordinate system of the cam group component in several cross sections in the plane of the cross section distance that drawing stipulates, can rotate in the margin of tolerance around Z axis, its long-pending folded point can move freely in the Tolerance of Degree of position scope of long-pending folded point, jointly builds the special space of a change at random;
(2). the blade that is detected, locates, when packing this device into, rotate around Z axis in the free degree that each comfortable tolerance of the cam group component in each cross section allows, move in the plane at x, y, find one to close the position that symbol requires finally for the blade with error, after blade is positioned, by clamp mechanism, the position of blade is maintained.
2. the device of the detection of blade blade profile, location and maintenance positioning states, with the position of point location fixed blade length direction, detect blade profile " line profile degree " with the profile model, it is characterized in that:
(1). said blade profile detects, locates and keep the device of positioning states, and it is by forming for the blade profile cam group component (16) of setting up the reference seat (20) of unified coordinate system, several cross sections, long-pending folded axle check rod (85);
(2). in said cam group component (16), centering block (4) is integral with model (3), be connected with patterns (2) by rotating shaft (10), model (3) is opened or closure, model (3) guarantees by quality of fit and positioning port model on (11) the complete closure of centering block (4) with rotating shaft (10) with the relative position of model (2), between patterns (2) and openable model (3), with shaking shoulder (5) rotating shaft (8), model (3) is opened in the mechanism that screw (9) forms or closure puts in place and fixes,
(3). said cam group component (16), a groove with patterns (2) precision-fit is arranged on its model seat (1), it guarantees that model (2) (3) is at x, mobile in the y plane, two garden pins (6) (7) are arranged on model seat (1), garden pin (6) (7) is at x, the origin of coordinates of y is on the same circumference of the garden heart, soleplate (19) has two slots with straight pin (6) (7) precision-fit, slot and straight pin (6) (7) are on same circumference, it and straight pin (6) (7) are in the gap of circumferencial direction, guarantee to relatively rotate in the margin of tolerance at partial twist angle between soleplate (19) and model seat (1),
(4). have on model seat (1) one with the hole of steel ball (24) precision-fit and the screw (17) that can hold out against steel ball (24) or unclamp.Hole coaxial line on a hole it and model seat (1) is arranged on soleplate (19), the diameter in this hole is less by 5 percent to ten than steel ball (24), different by dieback or the degree of unclamping when steel ball (24), patterns (19) is changed between full tolerance zero with respect to the relative partial twist amount of model seat (1);
(5). have on soleplate (19) square toes respectively with reference seat (20) on the square hole precision-fit, it guarantees that cam group component (16) is only at x, in the y plane, it guarantees the cross section distance of cam group component, a T-shaped groove with displacement controll block (13) precision-fit is arranged respectively on model seat (1) and patterns (2), displacement controll block (13) can be slided along Z-direction in T-shaped groove, when displacement controll block (13) with respect to the T-shaped groove on model seat (1), being fixed on different positions can make cam group component (16) change between full tolerance zero in the side-play amount of y direction, come the installation accuracy of test set component (16) from the long-pending folded axle check rod (85) of reference seat (20) foundation.
3. a blade blade profile is located and keeps the device of positioning states it is characterized in that:
(1). the device of said blade profile location and maintenance positioning states, " line profile degree " require by meeting, or continuous two the profile locating pieces (26) (27) of the profile of experimental actual conditions particular design, auxiliary positioning assembly (32), auxiliaryly hold down assembly (37), alignment pin (31) housing screw (30) forms
(2). build a special space that meets blade design figure requirement after above-mentioned profile locating piece (26) (27) combination, its geometric center lines is exactly the long-pending folded axle of blade, vertical, parallel profile is the positioning datum of trailing edge processing mutually
(3). above-mentioned profile locating piece, (26), (27), respectively there is a high boss of 5～15 millimeters its one or both ends, (28), (29), table top is that profile is consistent with the listrium profile on the blade that is positioned respectively, the peripheral size of the periphery of boss and corresponding listrium, consistent when being in the lower deviation state, table top, (28), (29) distance between is be positioned ideal value or the lower difference of blade and blade height degree, at table top, (28), (29) periphery is provided with several attached dowelling assemblies that helps, (32)
(4). above-mentioned auxiliary positioning sub-assembly (32), it is comprised of eccentric shaft (33), spring (34), clamp-screw (35), stop screw (36),
(5). it is comprised of above-mentioned auxiliary compression positioning component (37) push rod (38), spring (39), adjustment screw (40) that rigidity is consistent, and they configure in pairs at blade back leaf box.
4. blade blade profile detection and location and keep the device of positioning states with the position of point location fixed blade length direction, detect blade profile " line profile degree " with the profile model, it is characterized in that:
(1). said blade profile detects, locates and keep the device of positioning states, and it is by several cross section combiners (76) (77) of large pedestal (78) (79).Several low-melting alloy square chests (80) form,
(2). said cross section combiner, fit by cam group, tangential reference seat (66) (68), zero-bit limit and hold-down mechanism (61), displacement checkout gear (70), torsional capacity checkout gear (69) forms,
(3). said cam group is fit, blade back plate sample (58), leaf basin model (57) is at tangential somatotype, moving direction is with tangential vertical, rotate with model shifting seat (55) (56) precision-fit and around axle (60), shifting seat (55) (56) reverses plate (62) precision-fit and moves in same plane with model (57) (58) by square key (59) with model, there is the slot precision-fit on straight pin (64) (65) and soleplate (63) model torsion plate (62) lower end, move in the margin of tolerance with shifting seat (55) (56)
(4) said zero-bit limits and hold-down mechanism (61), formed by pressing plate (61) straight pin (73) (74) screw (75),
(5) said low-melting alloy square chest, at directions X somatotype one-tenth (81) (82), blade inlet and outlet limit two-half die, and casting gate (83) arranged, exhaust outlet (84), there is the profile (86) (87) that is complementary with blade profile at the square chest two ends, and there is the die cavity that holds low-melting alloy the centre.
5. positioner according to claim 3, is characterized in that, has several places can hold the die cavity of low-melting alloy in profile locating piece (26) (27), and with cast gate (53) exhaust outlet (52).
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| CN103978462A (en) * | 2014-05-19 | 2014-08-13 | 中国南方航空工业(集团)有限公司 | Blade cavity regulating tool |
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