CN108723121A - A kind of school type device of high temperature alloy Split Casing and its bearing calibration - Google Patents

A kind of school type device of high temperature alloy Split Casing and its bearing calibration Download PDF

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Publication number
CN108723121A
CN108723121A CN201810540880.XA CN201810540880A CN108723121A CN 108723121 A CN108723121 A CN 108723121A CN 201810540880 A CN201810540880 A CN 201810540880A CN 108723121 A CN108723121 A CN 108723121A
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casing
school type
external
split
school
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CN108723121B (en
Inventor
杨武
任景刚
孔令珊
关长军
张磊
王军
郭相峰
党宏武
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AECC Aviation Power Co Ltd
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AECC Aviation Power Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/06Removing local distortions
    • B21D1/10Removing local distortions of specific articles made from sheet metal, e.g. mudguards

Abstract

The invention discloses a kind of school type devices of high temperature alloy Split Casing, including the first external form corrector loop and the second external form corrector loop;Circular ring shape seam allowance is offered on the inside of external form corrector loop, the diameter of circular ring shape seam allowance is identical as by the end face theory outer diameter of school type casing;External form corrector loop end face offers several wedged holes being uniformly distributed circumferentially, and circular ring shape seam allowance of the wedged hole on external form corrector loop, further includes the wedge block to match with wedged hole;The supporting rod connection supporting block and mandrel of inner mold support, supporting block outer mold surface is consistent with by school type casing inner mold face, and supporting rod is arranged along by the radial direction of school type casing;Also disclose the school type method of Split Casing;The cold school type and hot school type of Split Casing are combined, solves the variation of Split Casing ovality too greatly, the problem of causing to be unsatisfactory for design requirement, ensure that Split Casing ovality disclosure satisfy that the requirement of following process, simplify the difficulty of following process process, the processing quality for improving part, reduces rejection rate.

Description

A kind of school type device of high temperature alloy Split Casing and its bearing calibration
Technical field
The invention belongs to large-scale Split Casing manufacture fields, and in particular to a kind of school type device of high temperature alloy Split Casing And its bearing calibration.
Background technology
Casing is as a kind of typical part in Aeronautics and Astronautics engine, gas turbine, spray, turbofan boat in all types of whirlpools It is generally used in empty engine, turboramjet engine, gas turbine.Split Casing is two semi-rings with longitudinally mounted side Shape half portion casing is faying face between longitudinally mounted side.With the continuous development of aero engine technology, high-temperature alloy material exists Use in Split Casing is more and more common.The good fatigue behaviour and fracture toughness that high-temperature alloy material has, are adapting to While current aero engine technology, but also the existing deformation controlling problem of Split Casing processing.The high temperature of annular closes Often there is larger deformation in metal parts, after severance for Split Casing class part, deformation is particularly bright after circumferential cut-out Aobvious, circularity is difficult to meet following process requirement, and deflection is also difficult to make up in following process, it is easy to cause waste product, influence to produce Product qualification rate, the strong influence production cost of part and the economic benefit of enterprise.
For such situation, the following several method of generally use carries out school type:
1. carrying out cold school type using mechanical mechanism.Using specific mechanical mechanism, according to the deflection of casing, out of casing Type or external form apply pressure, so that casing is deformed more than the critical point of plastic deformation, calibration result is formed to the deformation generated. High temperature alloy casing is not particularly suited for this kind of method because of its good fatigue toughness.
2. correcting the two half-unit of Split Casing respectively.This method is difficult to control school type amount, is easy to deposit after calibration, two Half portion casing misalignment serious situation, thus be difficult to be applicable on Split Casing.
The patent declared already《A kind of the school type device and its school type method of engine crankcase inner ring》The patent No.: CN102069109A (applicants:Xi'an Aero-engine Corporation Ltd) described device and method, mainly for glue-line Casing inner ring carries out school type, is not suitable for the school type of Split Casing.
The patent declared already《A kind of large thick-wall annular casing corrector》The patent No.:CN203725543U (applications People:Xi'an Aero-engine Corporation Ltd) described device, after problem is its school type, casing is interior in the presence of plastic deformation and interior Stress is difficult to high temperature alloy casing to form preferable school type effect.
The patent declared already《A kind of method of the hot school type of aero-engine large size block cast casing》The patent No.: CN104551522A (applicants:Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City) and《A kind of essence casting case structure The hot school type method of part》The patent No.:CN102392114A (applicants:Liming Aeroplane Engine (Group) Co., Ltd., Shenyang City) The method is mainly used for carrying out school type to axial deformation part, and heat treatment allows to be repeated, and is not particularly suited for circumferential deformation High temperature alloy casing.
Invention content
In order to solve problems of the prior art, the invention discloses a kind of school types of high temperature alloy Split Casing Device and bearing calibration, the deformation that can be effectively generated to high temperature alloy Split Casing after cut-out are corrected, make to booting The ovality of casket disclosure satisfy that following process requirement, reduce the difficulty of processing of subsequent technique.
To achieve the goals above, the technical solution adopted by the present invention is a kind of school type dress of high temperature alloy Split Casing It sets, including external form corrector loop and inner mold support, external form corrector loop include the first external form corrector loop and the second external form corrector loop;External form Circular ring shape seam allowance is offered on the inside of corrector loop, the diameter of circular ring shape seam allowance is identical as by the end face theory outer diameter of school type casing;Outside Type corrector loop end face offers several wedged holes being uniformly distributed circumferentially, and circular ring shape of the wedged hole on external form corrector loop stops Mouthful, further include the wedge block to match with wedged hole;Inner mold support includes mandrel, several supporting rods and several supporting blocks;Support Bar connects supporting block and mandrel, and supporting block outer mold surface is consistent with by school type casing inner mold face, and supporting rod is along by the diameter of school type casing To setting.
Supporting block with it is contour by school type casing.
At least two counterbores are offered on the inside of supporting block, counterbore position is uniformly distributed along the short transverse of supporting block, branch The quantity of strut is consistent with the quantity of counterbore.
One end of supporting rod is cylinder, is coordinated with the counterbore on the inside of supporting block;It is offered in mandrel for connecting support The other end of the threaded hole of bar, supporting rod is that helicitic texture is connect with the threaded hole in mandrel.
The axis of threaded hole and counterbore is identical as the axis of supporting rod.
The height of mandrel is consistent with by school type casing.
A kind of school type method of high temperature alloy Split Casing, includes the following steps:
Step 1, the outer diameter of the front/rear end designated position on detection two half-unit Split Casing faying face direction is real respectively Actual value, the single-side shift amount in calculations incorporated face;
Step 2, by two half-unit Split Casing on being placed on platform, and by the faying face pair of two half-unit Split Casing Together, the diameter of detection and faying face circumferencial direction upper casing in 90 ° is calculated by the ovality of school type casing;
Step 3, two half-unit casing is corrected using external form corrector loop;
Step 4, the Split Casing equipped with external form corrector loop is placed in vacuum heat treatment furnace and carries out solution treatment;
Step 5, the Split Casing after step 4 solution treatment is removed from external form corrector loop, remeasures Split Casing Ovality;
Step 6, the threaded hole on Split Casing faying face is processed;
Step 7, the unfitness of butt joint that two Split Casings are calculated by the data in step 5 is used according to the determination of wrong variable The maximum gauge of screw;
Step 8, two half-unit casing is attached with the screw determined in step 7, and measures the ovality after connection;
Step 9, determine connection procedure to by the shadow of school type Split Casing ovality according to step 8 and step 5 measured data It rings;
Step 10, the Split Casing for being connected as the domain is fitted into external form corrector loop, while inner mold support is put into, to machine Casket inner mold is supported, and the corrected value of the ovality before ageing treatment is determined according to the ovality of step 5 gained Split Casing;
Step 11, vacuum aging processing is carried out by school type Split Casing to completion step 10.
By the screw thread hole site of school type Split Casing according to by the ovality of school type casing and it is expected that casing correction in step 6 Ellipticalness afterwards determines that aperture is true according to the error range of the ellipticalness deflection by school type casing before and after the type of school It is fixed.
In step 8, there is gap, the gap passes through two half-unit machine between the screw and threaded hole of two half-unit casing The difference of the ovality of casket determines that the material of screw is according to by the material determination of school type casing.
In step 10, the length adjustment of screw thread in mandrel external form is stretched out by two above and below the type casing of school by changing supporting rod The circularity of outer circle.
Compared with prior art, the present invention at least has the advantages that:Matched using external form corrector loop and inner mold support While the device of conjunction by school type casing to being corrected, the rigidity of casing is enhanced, avoids supporting the when of using to occur in inner mold Unnecessary deformation, the circular ring shape seam allowance that external form corrector loop inside opens up, external form corrector loop end face, which offers, circumferentially uniformly to be divided Several wedged holes of cloth, the wedge block that setting matches with wedged hole in wedged hole can be simultaneously by two parts of Split Casing It is securely closely installed in the type device of school, in fixed and timing, makes Split Casing uniform stressed;
The method that cold school type and hot school type for high temperature alloy Split Casing are combined has obtained a set of for high temperature conjunction The empirical equation of golden Split Casing correction, and Split Casing mechanical property is improved using heat treatment process using during the type of school Its internal stress is eliminated while energy, stable which solve high temperature alloy Split Casing ovalitys to change too greatly, leads to not meet The problem of design requirement, ensures that Split Casing ovality disclosure satisfy that the requirement of following process, simplifies following process process Difficulty solves the problems, such as to restrict the development of high temperature alloy Split Casing technology, improves the processing quality of part, reduce waste product Rate is in advanced international level.
Further, counterbore position enables along being axially uniformly distributed by school type casing by school type casing uniform stressed.
Further, connection two half-unit is by the selection of the screw thread hole site of school type Split Casing and and threaded hole and spiral shell Follow closely the selection in gap so that the device of the present invention can realize the two half-unit inconsistent to ovality to booting well Casket carries out school type.
Further, measure two half-unit Split Casing connection procedure in deflection, with connect after casing ovality It converts, determines and need the casing ovality that corrects, calculate further according to the empirical equation and to need before heat treatment to ensure Casing ovality.
Further, when inner mold support at the faying face of two half-unit casing to being supported, two half-unit can be eliminated The oval inconsistent situation of casing.
Further, there is gap between screw and screw hole when connecting two half-unit casing, the gap passes through two and half The difference of the ovality of portion's casing determines, can be finely adjusted by gap when connecting two half-unit casing.
Further, the material of screw reasonably chooses screw, helps to reduce according to by the material determination of school type casing It after screw is connected and fixed with casing, carries out in heat treatment process, expansion is inconsistent and generates stress.
Further, two half-unit is connected by the screw thread hole site of school type Split Casing according to by the ovality of school type casing Determine that aperture is according to the ellipticalness deflection by school type casing before and after the type of school with the ellipticalness after estimated casing correction Error range determine, it is ensured that be not required to change after threaded hole one-pass molding, effectively avoid doing over again, improve yield rate.
Further, it is adjusted by two above and below the type casing of school by changing the length of screw thread in supporting rod stretching mandrel external form The circularity of a outer circle so that supporting rod by school type casing to that can apply enough pressure and accurate size.
Description of the drawings
Fig. 1 is type device in school of the present invention and the schematic diagram that is coordinated by school type casing.
Fig. 2 is the structural schematic diagram of mandrel;Fig. 2 (a) is the schematic front view figure of mandrel;Fig. 2 (b) is that the section view of mandrel is shown It is intended to;
Fig. 3 is the structural schematic diagram of supporting rod;Fig. 3 (a) is supporting rod front view, and Fig. 3 (b) is the A-A of Fig. 3 (a) to cuing open View;
Fig. 4 is the structural schematic diagram of supporting block;Fig. 4 (a) is the front view of supporting block;Fig. 4 (b) is the section view of supporting block Figure;
Fig. 5 is the structural schematic diagram of external form corrector loop;Fig. 5 (a) is the front view of external form corrector loop;Fig. 5 (b) is external form school The sectional view of positive ring;
In figure:1. mandrel;2. supporting block;3. supporting rod;4. the first external form corrector loop;5. the second external form corrector loop;
Specific implementation mode
The present invention will be described in detail below in conjunction with the accompanying drawings:
As shown in fig. 1~fig. 5, the school type device of a kind of high temperature alloy Split Casing, including external form corrector loop and inner mold branch Support, external form corrector loop include the first external form corrector loop 4 and the second external form corrector loop 5;Circular ring shape is offered on the inside of external form corrector loop Seam allowance, the diameter of circular ring shape seam allowance are identical as by the end face theory outer diameter of school type casing;External form corrector loop end face was offered along week To equally distributed several wedged holes, circular ring shape seam allowance of the wedged hole on external form corrector loop, two external form corrector loop wedge shapes Towards on the contrary, the wedged hole small end of i.e. one of external form corrector loop is towards circular ring shape seam allowance, another external form corrects the small end in hole The wedged hole big end of ring is towards circular ring shape seam allowance;Further include the wedge block to match with wedged hole, wedge block on corrector loop Wedged hole no-float, for will be wedged in external form corrector loop by school type casing;External form corrector loop is according to by school type casing height Difference is designed as 2 or multiple, and corrector loop, which uses, has preferably rigidity, and is connect with by the material thermal expansion coefficient of school type casing Close material is made;
Inner mold support includes supporting block 2, supporting rod 3 and mandrel 1;Supporting block 2 and contour, material and quilt by school type casing The material thermal expansion coefficient of school type casing is consistent and has certain rigidity, and outer mold surface is consistent with by school type casing inner mold face, Inside offers counterbore at least two, and counterbore position enables uniform by school type casing along being axially uniformly distributed by school type casing Stress, quantity is according to casing size adjusting;The quantity of supporting rod 3 is consistent with the quantity of counterbore, and one end of supporting rod 3 is cylinder Shape forms 5mm~10mm clearance fits with the counterbore of 2 inside of supporting block, and the other end is helicitic texture, is connect with mandrel 1, stage casing For hexagonal prisms;Supporting rod 3 is main load mechanism, has preferable rigidity, material consistent with by school type casing;Mandrel 1 Height is consistent with by school type casing, there is several threaded holes to match with 3 threaded one end of supporting rod, screw thread in the external form of mandrel 1 Hole is divided into two layers in an axial direction, and the quantity of threaded hole is consistent with the quantity of supporting rod 3, and the axis of threaded hole sinks in supporting block inner mold The axis in hole is identical;The material of mandrel 1 is consistent with by the material thermal expansion coefficient of school type casing, and has certain rigidity, protects Demonstrate,proving the use being supported on screw thread will not interfere with each other, and can provide firm support force;It is logical that the center of mandrel 1 offers one Hole penetrates through each threaded hole, avoids because of the problem of after High-temperature cooling, forming vacuum in threaded hole, supporting rod 3 is caused to be difficult to dismantle.
It is currently preferred, inner mold support and Split Casing same material.
When casing material is GH4169, the material of inner mold support uses GH130, K10, GCr90 or 40Cr.
The length that inner mold supports each supporting rod of depth adjustment 3 of threaded hole in mandrel 1 is screwed in by change.
According to by the quantity of the size adjusting supporting rod 3 and supporting block 2 of school type casing.
It will be wedged in corrector loop by school type casing using wedged hole and wedge block, and supported jointly to by school type machine with inner mold Casket carries out school type;Inner mold support includes that mandrel 1, supporting block 2, supporting rod 3 are constituted, mutual indepedent between each mechanism, passes through connection Mechanism connects, a kind of preferred embodiment of the school type device of high temperature alloy Split Casing, it is characterised in that external form corrector loop It is made of corrector loop and wedge block, wedge block can be stored separately after wedging corrector loop by school type casing.
It is currently preferred, supporting block 2 with by the circumferential contact length of school type casing be 150mm~250mm.
Currently preferred, the quantity of supporting block 2 is 4, be respectively supported at by 0 ° of school casing inner mold one week, 90 °, 180 ° and 270 ° of directions.
Currently preferred, the wedge-shaped hole number on each external form corrector loop is 20.
Currently preferred, the small end opening of wedged hole of the first external form corrector loop 4 is towards circular ring shape seam allowance, the second external form school The big end opening of wedged hole of positive ring 5 is towards circular ring shape seam allowance.
The present invention also provides a kind of school type methods of high temperature alloy Split Casing, and the casket that will be switched on first by school type is packed into two In a external form corrector loop, ensure end face and the fitting of external form corrector loop seam allowance lower face at casing both ends, to two of Split Casing End face is corrected respectively;Solution treatment is carried out to the Split Casing with external form corrector loop again;Then by Split Casing from outer It is taken out in type corrector loop, and measures its ovality, connecting hole is processed on two half-unit Split Casing according to measurement result, it will be right Booting casket is attached by bolt structure, forms domain casing;Later, using inner mold support and external form corrector loop to fixture into Row correction;Ageing treatment finally is carried out to the Split Casing with inner mold support and external form corrector loop.
Specifically include following steps:
Step 1, the outer diameter of the front/rear end designated position on detection two half-unit Split Casing faying face direction is real respectively Actual value, the single-side shift amount in calculations incorporated face;
Step 2, by two half-unit Split Casing on being placed on platform, and by the faying face pair of two half-unit Split Casing Together, the diameter of detection and faying face circumferencial direction upper casing in 90 ° is calculated by the ovality of school type casing;
Step 3, two half-unit casing is corrected using external form corrector loop;
Step 4, the Split Casing equipped with external form corrector loop is placed in vacuum heat treatment furnace and carries out solution treatment;It completes According to its school type effect after solution treatment, school type and ageing treatment are carried out again;
Step 5, the Split Casing after step 4 solution treatment is removed from external form corrector loop, remeasures Split Casing Ovality;
Step 6, the threaded hole on Split Casing faying face is processed;By the screw thread hole site of school type Split Casing according to by school The ovality of type casing and it is expected that casing correction after ellipticalness determine, aperture according to by school type casing before and after the type of school The error range of ellipticalness deflection determines.
Step 7, the unfitness of butt joint that two Split Casings are calculated by the data in step 5 is used according to the determination of wrong variable The maximum gauge of screw;
Step 8, two half-unit casing is attached with the screw determined in step 7, and measures the ovality after connection; Bolt structure is equipped with gap when connecting two half-unit casing, and the gap is true by the difference of the ovality of two half-unit casing Fixed, the material of screw is according to by the material determination of school type casing, and the coefficient of thermal expansion of the two is as close to the present invention is preferred , the material of screw is identical as by the material of school type casing.
Step 9, determine connection procedure to by the shadow of school type Split Casing ovality according to step 8 and step 5 measured data It rings;When corresponding diameter change amount maximum value is less than 0.5mm in the data and step 5 of its Split Casing step 8, then it is assumed that connection Process by school type Split Casing ovality on not influenced;Think connection procedure if the maximum value is more than or equal to 0.5mm To being had an impact by school type Split Casing ovality.
Step 10, the Split Casing for being connected as the domain is fitted into external form corrector loop, while inner mold support is put into, according to The front and back ellipticalness and reduced value that two half-unit casing is connected through a screw thread, adjustment inner mold support, to by school type casing into Row reinforcing support stretches out the length adjustment of screw thread in 1 external form of mandrel by two outer circles above and below the type casing of school by changing supporting rod 3 Circularity, inner mold support to being supported at the faying face of two half-unit casing when, two half-unit casing ellipse can be eliminated not Unanimous circumstances;
Step 11, vacuum aging processing is carried out by school type Split Casing to completion step 10.
In step 4, before solution treatment, as Split Casing ovality A<When 2mm, and Split Casing faying face laminating degree When preferable, the correction before solution treatment is supported without using inner mold, and the correction after solution treatment, before ageing treatment does not use external form school Positive ring.
After solution treatment, as Split Casing ovality A > 2mm, before being heat-treated, its ovality should be corrected For-(1.3~1.5) * A;The "-" of the empirical equation indicates, should be corrected to the dot in former ovality a little louder, former ovality On a little bigger be corrected to dot;When the value of Split Casing ovality A is:0.5<When A≤2mm, before being heat-treated, Ying Jiang Its ovality is corrected to-and (A+0.6)~-(A+1);The "-" of empirical equation indicates, should be corrected to the dot in former ovality greatly Point, a little bigger in former ovality are corrected to dot.
The split class casings of larger GH4169 are deformed using of the present invention for ovality after cut-out with reference to two The present invention is further described for the corrected embodiment of device and method.
Embodiment 1
First external form corrector loop 4 is cirque structure, and seam allowance is provided on the inside of end face, and seam allowance diameter installs side with casing One end outer circleThere is the gap of 0.5mm;First external form corrector loop, 4 end face offers wedge-shaped square groove;Material is austenite stainless Steel 1Cr18Ni9Ti.
Second external form corrector loop 5, is cirque structure, and a side end face has seam allowance at one, seam allowance diameter to install side with casing Other end outer circleThere is the gap of 0.6mm;Second external form corrector loop, 5 end face offers wedged hole, and material is austenite Stainless steel 1Cr18Ni9Ti.
Mandrel 1 with it is highly consistent by school type casing, the outside of mandrel 1 along the circumferential direction open up within one week 8 groups it is equally distributed The material of threaded hole, every group of two threaded holes, spacing 77mm, mandrel 1 is austenitic stainless steel 1Cr18Ni9Ti.
The external form of supporting block 2 is consistent with casing inner mold, is designed at three and holds out against long muscle, in the medium position of long muscle, along axis To elongated slot is provided with, for hiding interference, the inner mold of supporting block 3 opens up two counterbores, counterbore spacing 77mm, the height of supporting block 3 It is consistent with casing, it is highly 200, material is austenitic stainless steel 1Cr18Ni9Ti.
One end of supporting rod 3 is helicitic texture, and screw thread cooperates with the screw thread in mandrel 1, and the other end of supporting rod 3 is Cylinder is matched with the counterbore in 2 inner mold of supporting block.
Step 1, the outer diameter of the front/rear end designated position on detection two half-unit Split Casing faying face direction is real respectively Actual value, the single-side shift amount in calculations incorporated face;Detect left and right two half-unit Split Casing upper end theoretical valueFor 657mm, actual measurement Value is respectively:653.5mm, 655mm, lower end theoretical valueFor 673.5mm, actual measurement size is respectively:670.3mm, 671.7mm, Single-side shift amount is 0.9mm~1.75mm.
Step 2, by two half-unit Split Casing on being placed on platform, and by the faying face pair of two half-unit Split Casing Together, make to fit closely between faying face, the diameter of detection and different location on the casing circumferencial direction in faying face direction in 90 °, Calculate part ovality;Detect Split Casing upper end theoretical valueFor 657mm, actual measurement corresponding size is 659.5mm, lower end reason By valueFor 673.5mm, actual measurement corresponding size is 675.2mm, and part ovality is 4.9~6mm;Measured value-in step 2 Measured value in step 1.
Step 3, two half-unit casing is corrected using external form corrector loop, and ensure corrector loop seam allowance end face and Casing upper and lower end face is bonded.
Step 4, the Split Casing with external form corrector loop is lain in a horizontal plane in and carries out solution treatment in vacuum heat treatment furnace; Solution treatment:± 10 DEG C of temperature (950~980) keeps the temperature 1 hour, air-cooled.
Step 5, Split Casing is removed from external form corrector loop, remeasures the ovality of Split Casing, left and right two Front/rear end outer diameter on half portion casing faying face direction is:Upper endTheoretical value is 657mm, measured value 656.4mm, 657.3mm, lower endTheoretical value is 673.5mm, measured value 673.1mm, 673.6mm;
The diameter of casing circumference on faying face direction in 90 °:Upper endTheoretical value is 657mm, and measured value is 657.8mm, lower endTheoretical value is 673.5, measured value 673.4;Ovality 1.4mm;The single-side shift amount 0.05 of faying face ~0.4mm.
Step 6, the threaded hole on Split Casing faying face is processed, according to the single-side shift amount of faying face, to threaded hole Position is adjusted, and there are adjustment surpluses on aperture, and hole site is connected away from theoretical position as Split Casing after the type of school Offset;The aperture that connecting hole is designed in example isI.e. a diameter of 8mm, does not translate connecting hole position, and aperture is pressedProcessing.
Step 7, the unfitness of butt joint that two Split Casings are calculated by the data in step 5 is used according to the determination of wrong variable The maximum gauge of screw determines that unfitness of butt joint is 0.9mm, ovality 1.4mm, chooses a diameter ofAttachment screw, Its material is consistent with by school type Split Casing material.
Step 8, two half-unit casing is attached with the screw determined in step 7, and measures the ovality after connection, Front/rear end outer diameter on the two half-unit casing faying face direction of left and right is:Upper endTheoretical value is 657mm, and measured value is 656.6mm, 657.5mm, lower endTheoretical value is 673.5mm, measured value 673.1mm, 673.8mm;It is in 90 ° with faying face The diameter on casing circumference on direction:Upper endTheoretical value is 657mm, measured value 657.8mm, lower endTheoretical value is 673.5mm, measured value 673.6mm.
Step 9, determine connection procedure to by the shadow of school type Split Casing ovality according to step 8 and step 5 measured data It rings, the data of the data of step 8 and step 5 is compared, variable quantity is up to 0.2mm, it is believed that connection procedure is to by school Type Split Casing ovality does not influence.
Step 10, the Split Casing for being connected as the domain is fitted into external form corrector loop, while inner mold support is put into, to machine Casket inner mold is supported, the ovality 1.4mm of the present embodiment casing, rule of thumb formula, and the part carried out before ageing treatment is ellipse Circularity should reach -2~2.4mm;It is as follows to the roundness measurement after correction:Upper endTheoretical value is 657mm, and measured value is 658.4mm, 658.9mm, lower endIt is theoreticalMeasured value is 674.9mm, 674.8mm.With on faying face direction in 90 ° Casing designated position diameter:Upper endTheoretical value is 657mm, measured value 656.9mm, lower endTheoretical value is 673.5mm surveying 672.6mm.
Step 11, vacuum aging processing is carried out by school type Split Casing to completion step 10;The aging treatment process Parameter is as follows:720 ± 10 DEG C of temperature keeps the temperature 8h, is cooled to 620 ± 10 DEG C with (50 ± 10) DEG C/h rates, keeps the temperature 8h, air is cold But.
Step 12, it will be removed from the type device of school by school type Split Casing, two half-unit Split Casing dismantled, it is detected Ovality.To the roundness measurement after correction:Upper endTheoretical value is 657, measured value 657.0mm, 657.3mm, lower endReason It is 673.5mm, measured value 673.5mm, 673.8mm by value.It is straight with the casing designated position on faying face direction in 90 ° Diameter:Upper endTheoretical value is 657mm, measured value 656.9mm, lower endTheoretical value 673.5mm, measured value 673.4mm,; The final ovality 0.4mm of Split Casing.
Embodiment 2
Step 1, detection left and right two half-unit Split Casing corresponding size is respectively upper endTheoretical value is 657mm, actual measurement Value is 656.2mm, 656.4mm, lower endTheoretical value is 673.5mm, measured value 673.38mm, 673.2mm.
Step 2, it is oval to calculate rough part for the diameter of detection and the casing designated position on faying face direction in 90 ° Degree.Detecting Split Casing corresponding size is respectively:Upper endTheoretical value is 657mm, measured value 657mm, lower endTheoretical value For 673.5mm, measured value 673.96mm, part ovality is 0.8mm~1mm.
Step 3, two half-unit casing is corrected using external form corrector loop, ensures seam allowance end face and the casing of corrector loop Upper and lower end face is bonded.
Step 4, the Split Casing with external form corrector loop is lain in a horizontal plane in and carries out solution treatment in vacuum heat treatment furnace, The technological parameter of solution treatment is:± 10 DEG C of temperature (950~980) keeps the temperature 1 hour, air-cooled.
Step 5, Split Casing is removed from external form corrector loop, remeasures the circularity of Split Casing, left and right two and half Front/rear end outer diameter on portion's casing faying face is:Upper endTheoretical value is 657, measured value 655.7mm, 655.2mm, under EndTheoretical value is 673.5, measured value 672.4mm, 671.9mm;With the diameter of the casing on faying face direction in 90 °:On EndTheoretical value is 657mm, measured value 658mm, lower endTheoretical value is 673.5mm, measured value 674.7mm, ovality For 2.5mm~2.8mm, single-side shift amount about 0.2mm~1mm of faying face.
Step 6, the connecting hole on Split Casing faying face is processed, connection hole site is constant, and aperture is pressedProcessing.
Step 7, the maximum gauge of the screw used is determined according to the unfitness of butt joint of two Split Casings;According in step 5 Data determine that unfitness of butt joint is 0.5mm, choose a diameter ofAttachment screw, material is consistent with by school type Split Casing material.
Step 8, two half-unit casing is attached with the screw determined in step 7, and measures the ovality after connection; Front/rear end outer diameter in example on left and right two half-unit casing faying face direction:Upper endTheoretical value is 657mm, measured value 656.6mm, 656mm, lower endTheoretical value is 673.5mm, measured value 673.3mm, 672.5mm;With faying face side in 90 ° The diameter of upward casing designated position:Upper endTheoretical value is 657mm, measured value 657.4mm, lower endTheoretical value is 673.5mm, measured value 674.4mm, ovality 1.5mm.
Step 9, the date comprision of the data of step 8 and step 5 determines the connection procedure to by school type Split Casing The influence of ovality, variable quantity 1mm.
Step 10, the Split Casing for being connected as the domain is fitted into external form corrector loop, while inner mold support is put into, to machine Casket inner mold is supported;The ovality of casing is 1.5mm, rule of thumb formula, carries out the part ovality before ageing treatment and answers Reach -2.1mm~-2.5mm, since the ovality of Split Casing in step 9 has the variable quantity that can not ignore, carries out at timeliness The final ovality of part before reason should reach -3.1mm~-3.5mm;It is as follows to the roundness measurement after correction:Upper endTheoretical value For 657mm, measured value 658.7mm, 658.3mm, lower endTheoretical value is 673.5mm, measured value 675.7mm, 675.2mm;With the diameter of the casing designated position on faying face direction in 90 °:Upper endTheoretical value is 657mm, and measured value is 655.7mm, lower endTheoretical value is 673.5mm, measured value 672.6mm.
Step 11, vacuum aging processing is carried out by school type Split Casing to completion step 10;The aging treatment process Parameter is:720 ± 10 DEG C of temperature keeps the temperature 8h, and 620 ± 10 DEG C are cooled to (50 ± 10) DEG C/h rates, keeps the temperature 8h, cold in air But.
Step 12, it will be removed from means for correcting by school type Split Casing, two half-unit Split Casing is dismantled, it is detected Ovality;It is as follows to the roundness measurement after correction in example:Upper endTheoretical value is 657mm, measured value 655.6mm, 655.6mm, lower endTheoretical value is 673.5mm, measured value 673.5mm, 673.3mm.With on faying face direction in 90 ° The diameter of casing designated position:Upper endTheoretical value is 657mm, measured value 657mm, lower endTheoretical value is 673.5mm, Measured value is 673.8mm, ovality 0.5mm.

Claims (10)

1. a kind of school type device of high temperature alloy Split Casing, which is characterized in that supported including external form corrector loop and inner mold, external form Corrector loop includes the first external form corrector loop (4) and the second external form corrector loop (5);Circular ring shape is offered on the inside of external form corrector loop to stop Mouthful, the diameter of circular ring shape seam allowance is identical as by the end face theory outer diameter of school type casing;External form corrector loop end face offers circumferentially Equally distributed several wedged holes, circular ring shape seam allowance of the wedged hole on external form corrector loop, further includes matching with wedged hole Wedge block;
Inner mold support includes mandrel (1), several supporting rods (3) and several supporting blocks (2);Supporting rod (3) connect supporting block (2) with Mandrel (1), supporting block (2) outer mold surface is consistent with by school type casing inner mold face, and supporting rod (3) edge is set by the radial direction of school type casing It sets.
2. the school type device of high temperature alloy Split Casing according to claim 1, which is characterized in that supporting block (2) and quilt School type casing is contour.
3. the school type device of high temperature alloy Split Casing according to claim 1, which is characterized in that supporting block (2) it is interior Side offers at least two counterbores, and short transverse of the counterbore position along supporting block (2) is uniformly distributed, the quantity of supporting rod (3) with The quantity of counterbore is consistent.
4. the school type device of high temperature alloy Split Casing according to claim 1, which is characterized in that the one of supporting rod (3) End is cylinder, is coordinated with the counterbore on the inside of supporting block (2);The screw thread for connection support bar (3) is offered in mandrel (1) The other end in hole, supporting rod (3) is that helicitic texture is connect with the threaded hole in mandrel (1).
5. the school type device of high temperature alloy Split Casing according to claim 4, which is characterized in that threaded hole and counterbore Axis is identical as the axis of supporting rod (3).
6. the school type device of high temperature alloy Split Casing according to claim 1, which is characterized in that the height of mandrel (1) It is consistent with by school type casing.
7. a kind of school type method of high temperature alloy Split Casing, which is characterized in that include the following steps:
Step 1, the outer diameter actual value of the front/rear end on two half-unit Split Casing faying face direction, calculations incorporated are detected respectively The single-side shift amount in face;
Step 2, by two half-unit Split Casing on being placed on platform, and the faying face of two half-unit Split Casing is aligned, The diameter of detection and faying face circumferencial direction upper casing in 90 ° is calculated by the ovality of school type casing;
Step 3, two half-unit casing is corrected using external form corrector loop;
Step 4, solution treatment will be carried out equipped with the Split Casing of external form corrector loop;
Step 5, the Split Casing after step 4 solution treatment is removed from external form corrector loop, remeasures the ellipse of Split Casing Circularity;
Step 6, the threaded hole on Split Casing faying face is processed;
Step 7, the unfitness of butt joint that two Split Casings are calculated by the data in step 5 determines the screw used according to wrong variable Maximum gauge;
Step 8, two half-unit casing is attached with the screw determined in step 7, and measures the ovality after connection;
Step 9, determine connection procedure to by the influence of school type Split Casing ovality according to step 8 and step 5 measured data;
Step 10, the Split Casing for being connected as the domain is fitted into external form corrector loop, while inner mold support is put into, in casing Type is supported, and the corrected value of the ovality before ageing treatment is determined according to the ovality of step 5 gained Split Casing;
Step 11, vacuum aging processing is carried out by school type Split Casing to completion step 10.
8. the school type method of high temperature alloy Split Casing according to claim 7, which is characterized in that by school type in step 6 The screw thread hole site of Split Casing according to by the ovality of school type casing and it is expected that casing correction after ellipticalness determine, hole Diameter is determined according to the error range of the ellipticalness deflection by school type casing before and after the type of school.
9. the school type method of high temperature alloy Split Casing according to claim 7, which is characterized in that in step 8, two and half There is gap, the gap to be determined by the difference of the ovality of two half-unit casing between the screw and threaded hole of portion's casing, The material of screw is according to by the material determination of school type casing.
10. the school type method of high temperature alloy Split Casing according to claim 7, which is characterized in that in step 10, pass through Change supporting rod (3) and stretches out the length adjustment of screw thread in mandrel (1) external form by the circularity of two outer circles above and below the type casing of school.
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CN102248380A (en) * 2011-07-04 2011-11-23 南京航空航天大学 Method for processing integral casing of engine
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