Summary of the invention:
Purpose of the present invention is to manufacture and design a kind of turbine blade brush measurer, and blade is carried out pre-assembled, carry out the assembly quality index test in advance, make blade in workshop, just meet matching requirements, to improve work efficiency, shorten unit assembly period, reduce economic loss.
The object of the present invention is achieved like this:
A kind of turbine blade brush measurer, it is the phyllodium wheel of a segmental arc of simulation turbine rotor impeller, on this phyllodium wheel a plurality of blade fitting recess that distribute are radially arranged, the profile molded lines of fitting recess, radially radius and circular dividing are all consistent with the fitting recess of true impeller, and bottom land has blade locking screw and screw.
Described phyllodium wheel has an exterior arc surface, a pair of axial end that is parallel to each other, and a pair of peripheral side that is parallel to each other, a baseplane, this baseplane is vertical with the central radiation of phyllodium wheel; Described blade fitting recess is three, is distributed on the exterior arc surface, and wherein, the radiation of the blade fitting recess in the middle of being positioned at overlaps with the central radiation of phyllodium wheel; The blade locking screw of each blade fitting recess bottom land all connects the baseplane.
The center line of described blade locking screw is on the radiation of place fitting recess.
The peripheral side of described phyllodium wheel is provided with handle.
The processing technology of above-mentioned turbine blade brush measurer comprises step:
1.. make a mold, the anchor clamps that use when being used as processing phyllodium wheel, this mold is a triangle gradient piece, has a baseplane, a tapered plane, a upright plane, a pair of vertical transverse plane; Be useful on screw hole and dowel hole that turbine blade brush measurer is installed on the tapered plane of mold, the bottom surface of mold is useful on this mold is fixed on screw hole on the platen; The inclination angle of described tapered plane is identical with the inclination angle of blade fitting recess, and after the phyllodium wheel was loaded onto mold, the blade fitting recess of desire processing was vertical; Described screw hole, dowel hole have many groups, and its group number is identical with the quantity of blade fitting recess, each group screw hole, the corresponding blade fitting recess of dowel hole; Screw hole, dowel hole be at the circular dividing of the corresponding blade fitting recess of distributing position on the phyllodium wheel of tapered plane, makes the blade fitting recess that each group screw hole, dowel hole all can be corresponding with it be positioned at the position that lathe requires.
2.. six surfaces of processing phyllodium wheel, wherein, exterior arc surface is processed with fast silk cutting machine tool, and remaining surface is processed with machine tool, makes the phyllodium wheel blank;
3.. on the phyllodium wheel blank, process the dowel hole and the screw hole that cooperate, be connected with mold;
4.. mold is fixed on the workbench of wire cutting machine tool, again the phyllodium wheel blank is installed on the mold, insert alignment pin, tight, open lathe, cut out the blade fitting recess that just in time is in the machine tooling position with screw;
5.. unload the phyllodium wheel blank, reinstall, make another group screw hole, dowel hole on the corresponding mold of screw hole, dowel hole on the phyllodium wheel blank, cut out this group screw hole, the pairing blade fitting recess of dowel hole, so repeatedly, until cutting out all blade fitting recess.
4. step further comprises substep, earlier with fast silk cutting machine tool roughing blade fitting recess, uses slow silk cutting machine tool fine finishining blade fitting recess again.
2. step also has additional step afterwards, processes handle respectively and connect screw on two peripheral side of phyllodium wheel, and process the handle adaptive with this screw, is installed on the phyllodium wheel.
Technique effect of the present invention:
By using blade brush measurer, blade is carried out pre-assembled, carry out the assembly quality index test in advance, when processing print, can test, avoid occurring blade quality of lot problem effectively, reduce repair rate significantly, and make blade in workshop, just meet matching requirements, when guaranteeing that blade formally assembles, every blade all is qualified, has increased substantially assembly efficiency, shortened the unit manufacturing cycle, obvious economic.
The specific embodiment
During design brush measurer, it is a segmental arc of simulated impeller, be referred to as the phyllodium wheel, three blades are installed in general consideration, be that three blade fitting recess are arranged on the brush measurer, the profile molded lines of fitting recess, radially radius and circular dividing are pressed the profile molded lines of impeller of rotor blade fitting recess, radially radius and circular dividing design respectively.
Consider processing and easy to use, the profile of phyllodium wheel not necessarily is designed to the fan-shaped of strictness, and intrados makes horizontal plane into, and two peripheral side neither the inclined-plane, makes risers into.In addition, move during for ease of use, on the phyllodium wheel, designed a pair of handle, be arranged on two peripheral side.
Concrete structure is as follows:
Referring to Fig. 1, Fig. 2, Fig. 3: the brush measurer is to be made of phyllodium wheel I and handle II, α is the angle between the interior fitting recess of section in the middle of the B, R is a radially radius of fitting recess, β is the angle (note: have only in the middle of the B on the section each fitting recess center line just to meet at a bit and this point also is the center of circle of R) on fitting recess central plane and thickness two sides, fitting recess molded lines tolerance range is: be respectively 0mm three working face place tolerances, 0.013mm, 0.013mm, all the other local tolerances are 0.1mm.Wherein the gauge B of angle, radius, fitting recess tolerance range and phyllodium wheel all comes to turbine rotor impeller figure.
Referring to Fig. 4:, therefore, also need processing attachment screw hole and dowel hole on phyllodium wheel I because phyllodium wheel I will be installed on hereinafter described the mold III.2-Φ 12H6 pin-and-hole and 2-Φ 11/ Φ 17 screw hole locations are to determine like this on the phyllodium wheel I: use the CAD mapping software, make phyllodium wheel I profile earlier, remake out the most left and the rightest molded lines on the phyllodium wheel I thickness two sides, this molded lines of 2-Φ 12H6 centre distance 15～20mm, pin-and-hole and screw hole relative position are that level and vertical direction distance are 15mm, and two screw holes are about 15mm to the distance of phyllodium wheel I bottom surface.
Because the fitting recess precision height of brush measurer, if with common milling mode, one need moulding slightly, the finish-milling cutter, two need huge anchor clamps, mill a groove, rotate an angle, mill next groove again, rotate an angle again, suitable height of cost and precision also are difficult for guaranteeing like this.A numerical control cutting off machine (hereinafter to be referred as slow silk) the cutting accuracy height of being careful can satisfy the molded lines required precision.Because the copper wire of slow silk is the vertical state, and the blade fitting recess tilts, and adds man-hour, need brush measurer pad one angle owing between the fitting recess circular dividing requirement be arranged, process a groove after, the brush measurer also need change an angle, can't realize above-mentioned requirements with universal fixturing.This just needs a kind of special fixture to satisfy above-mentioned requirements, i.e. mold.
Referring to Fig. 5 (being Fig. 5-1, Fig. 5-2, Fig. 5-3, Fig. 5-4), Fig. 6: be a gradient piece on the mold III profile, the oblique angle is 90 °-β, and β is the inclination angle of blade fitting recess.Double dot dash line is a phyllodium wheel I among Fig. 5-1, past left end d5 plane is the central plane of fitting recess in the middle of the phyllodium opinion I from mold III right side, d2 takes turns the distance of two alignment pins of I and mold III for connecting phyllodium, K is the pin-and-hole that the location phyllodium is taken turns I to 1,2, No. 3,6-M10-6H is dark, and 20 hole depths 25 are fixed on the screwed hole of using on the mold III for phyllodium is taken turns I, the screw hole of 2-Φ 9/ Φ 16 for the mold III being fixed on soon, using on the slow workbench, a * b * c groove is a undercut, and purpose is to hurt the mold III when preventing to cut molded lines.
Mold is design like this:
1.. design a gradient piece, make brush measurer thickness simultaneously be placed on its inclined-plane after, the middle fitting recess of brush measurer is the vertical state;
2.. two dowel holes of design on the brush measurer, under the situation of interference fit groove not, two dowel hole pitch-rows are as far as possible little, can reduce the length of mold like this, fitting recess in the middle of two dowel hole symmetries;
3.. go out two dowel holes on the gradient piece according to two dowel hole Position Design on the brush measurer;
4.. in the inclined-plane of gradient piece, according to brush measurer fitting recess radially radius and circular dividing, design when two fitting recess go to the residing position of previous middle fitting recess respectively about the brush measurer and two the corresponding pin-and-hole of pin-and-hole positions on the brush measurer, be to have 6 pin-and-holes on the inclined-plane of gradient piece, the hole wall of noting edge hole to the distance of gradient piece profile about 5mm;
5.. the brush measurer need be fixed on the gradient piece, so two screw holes are designed in the appropriate location on the brush measurer earlier, corresponding Position Design has 6 screwed holes on the gradient piece again;
6.. hurt the gradient piece when preventing to cut molded lines, open a undercut in the back of gradient piece, with about fitting recess single face 5 gap 1mm;
7.. the gradient piece need be fixed on the slow silk workbench, so, design on the gradient piece have 3 with slow workbench on the corresponding screw hole of screw, the copper wire of the slow silk of cause is 15mm to the minimum distance of its workbench back, the workbench back is 40mm to the distance of its screw, being copper wire is 55mm to the screw center of workbench nearest, for the fitting recess that guarantees the brush measurer cuts out fully, the screw hole on the gradient piece apart from its undercut bottom surface more than or equal to 55mm;
8.. treat 4., 7. step intact after, the length of gradient piece and width have also just been determined, the foundation of the height of design gradient piece: the one, when the brush measurer goes to nadir, can not bump workbench, the 2nd, the pin-and-hole on the assurance inclined-plane and the screwed hole degree of depth are greater than 20mm.
Phyllodium wheel process is as follows:
Process six surfaces of phyllodium wheel earlier, wherein, exterior arc surface is processed with fast silk cutting machine tool, and remaining surface is processed with machine tool, makes the phyllodium wheel blank.On the phyllodium wheel blank, process the dowel hole and the screw hole that cooperate, be connected with the mold III, and the processing handle is installed screw and handle, thick then, fine finishining blade fitting recess.
Referring to Fig. 5, Fig. 7, Fig. 8, Fig. 9: the method for roughing phyllodium wheel fitting recess is: earlier the mold III is contained on the fast silk cutting machine tool workbench, centering M, N face are in 0.03mm, be screwed, phyllodium being taken turns I is placed on the mold III inclined-plane again, two dowel holes (2-Φ 12H7) align with pin-and-hole on the mold III on the phyllodium wheel I, insert 2 Φ, 12 special-purpose pins location, tight with the screw handle of 2 M10 * 40, can cut fitting recess.When the phyllodium wheel is installed, if its two dowel hole (2-Φ 8H7) aligns with " 1 " and " 1 " pin-and-hole on the mold III, then be process and assemble groove 1, after the process finishing, unload the phyllodium wheel and reinstall, make " 2 " and " 2 " pin-and-hole on the dowel hole alignment mold III of phyllodium wheel I, then be process and assemble groove 2, and the like, alignment " 3 " and " 3 " pin-and-hole, process and assemble groove 3 can process all fitting recess in proper order.
Referring to Fig. 5, Fig. 7, Fig. 8, Figure 10: the method for fine finishining phyllodium wheel I fitting recess, identical with the roughing step, difference is to process with slow silk cutting machine tool.
The using method of this brush measurer:
During with brush measurer check blade, its bottom surface is put on the flat board, the blade root of three blades is inserted respectively in three fitting recess of brush measurer, hold out against blade with three screws by brush measurer bottom locking screw, the blade root working face is all fitted tightly with brush measurer relevant work face, can measure blade root, integral shroud fit-up gap, blade root height and steam passage height.