CN109702657A - A kind of integral panel contour peening parameters design method - Google Patents
A kind of integral panel contour peening parameters design method Download PDFInfo
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- CN109702657A CN109702657A CN201910076841.3A CN201910076841A CN109702657A CN 109702657 A CN109702657 A CN 109702657A CN 201910076841 A CN201910076841 A CN 201910076841A CN 109702657 A CN109702657 A CN 109702657A
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Abstract
The present invention proposes a kind of integral panel contour peening parameters design method, design siding shot-peening path is extreme value line of curvature direction, it is discrete to siding progress in siding extreme value line of curvature direction using tracing algorithm, and obtain the corresponding wall panel thickness T of discrete point and radius of curvature R information；Integral panel shot-blast process parameter is established using multiple linear regression analysis method and calculates mathematical model, corresponding machine tool feed speed V is calculated by the corresponding wall panel thickness T of path discrete point and radius of curvature R；By the corresponding feed speed V of discrete point, set path equal strength zone velocity section, the equal strength region division in path is completed in discrete merging to shot-peening path, the corresponding feed speed in discrete point feed speed average value characterization equal strength region for including with path equal strength regionThe corresponding extreme coordinates in extraction path equal strength region and feed speed generate contour peening NC instruction, realize integral panel Digitized manufacturing.
Description
Technical field
The present invention relates to a kind of integral panel contour peening parameters design methods, belong to Digitized Manufacturing Technology neck
Domain.
Background technique
Contour peening is the important manufacturing process of labyrinth integral panel of Field of Aviation Manufacturing Varying-thickness, variable curvature, is led to
A large amount of projectile impact piece surface is crossed, layer of residual compressive stress is formed in piece surface, plate is made to occur bending and deformation, thus
Realize integral panel forming.Shot-peening process mainly measures injection air pressure, feed speed, bullet flow, spray by shot peening strength
The forming capacity of the difference shot-peening parameter combination such as firing angle and jet length, in actual contour peening engineering practice, for convenient for behaviour
Make, the bullet and nozzle of certain specification is selected generally according to physical condition, and be normal by parameter settings such as jet angle, jet lengths
Number controls bullet only by adusting the movement speed of nozzle in the case where keeping injection air pressure and bullet flow constant as far as possible
Ball is in the distribution density of surface of test piece to change the deflection by spray test specimen.According to the shot-peening of integral panel during contour peening
The corresponding shot-blast process parameter of path end points information and path, generates the shot-peening NC instruction of integral panel.
During siding contour peening, shot-peening path and shot-blast process parameter are usually obtained by empirical method and trial-and-error method
(movement speed of nozzle), the forming accuracy of part rely on operator's experience so that the wall panel parts manufacturing cycle extends, manufacture at
This increase.Integral panel shot-blast process parameter and shot-peening path are how quick and precisely designed, and automatically generates integral panel shot-peening
NC instruction is the requirement for realizing integral panel intelligence manufacture.
Summary of the invention
In order to solve the problems existing in the prior art, integral panel Digitized manufacturing is realized, the present invention proposes a kind of integral wall
Plate contour peening parameters design method plans integral panel shot-peening path and carries out discrete, and extraction path is discrete
The corresponding integral panel geological information (thickness and radius of curvature) of point；It establishes integral panel shot-blast process parameter and calculates mathematical model
And the corresponding shot-blast process parameter of shot-peening path discrete point (feed speed) is calculated, joined by the shot-blast process of path computing
Several pairs of integral panels carry out equal strength region division, and the corresponding extreme coordinates in extraction path equal strength region and corresponding shot-peening
Technological parameter (feed speed) generates the NC instruction that numerically-controlled machine tool can identify, realizes integral panel Digitized manufacturing.
The principle of the present invention thinking are as follows: design siding shot-peening path is extreme value line of curvature direction, using tracing algorithm in wall
Plate electrode value line of curvature direction is discrete to siding progress, and obtains the corresponding wall panel thickness T of discrete point and radius of curvature R information；It adopts
Integral panel shot-blast process parameter is established with multiple linear regression analysis method and calculates mathematical model, by the corresponding siding of path discrete point
Thickness T and radius of curvature R calculate corresponding machine tool feed speed V；By the corresponding feed speed V of discrete point, it is strong to set path etc.
Zone velocity section is spent, the equal strength region division in path is completed in the discrete merging to shot-peening path, with path equal strength region
The corresponding feed speed in discrete point feed speed average value characterization equal strength region for includingExtraction path equal strength region pair
The extreme coordinates and feed speed answered generate contour peening NC instruction.
The technical solution of the present invention is as follows:
A kind of integral panel contour peening parameters design method, it is characterised in that: the following steps are included:
Step 1: it is discrete to the tangential boundary line progress on integral panel external surface as spacing using shot-peening strip width, it obtains
Tangential boundary line serial variance point P0v, extract boundary discrete method point P0vThe geological information at placeWherein
(x0v, y0v, z0v) be coordinate value,For very shallow curvature value,For very shallow curvature principal direction；
Step 2: to each discrete point in tangential boundary line, a minimum line of curvature is generated, wherein for tangential side
I-th of discrete point P in boundary line0i, generate the process of corresponding i-th minimum line of curvature are as follows:
With i-th of discrete point P on tangential boundary line0iAs starting point, corresponding geological information isNext discrete point P on i-th minimum line of curvature is obtained using tracing algorithm1i: setting chases after
Track direction is very shallow curvature direction, and tracing algorithm step-length step is arranged, by
Calculate next discrete point P1iCoordinate (x1i, y1i, z1i), and discrete point P is extracted on integral panel external surface1i
Corresponding very shallow curvature principal directionVery shallow curvature value isObtain discrete point P1iGeological informationRecycle discrete point P1i, found according to tracing algorithm next on i-th minimum line of curvature
Discrete point P2i, until the coordinate of discrete point exceeds integral panel external surface bounds, thus obtain i-th minimum line of curvature
As shot-peening path Li；
And for any discrete point P on i-th minimum line of curvatureui, cross the discrete point and do integral panel external surface method
Line lui, the distance in the normal and integral panel between external surface crosspoint is asked to be denoted as the corresponding thickness T of the discrete pointui, discrete point
Corresponding radius of curvature
Step 3: by the integral panel structural member and the different shot-peening feed speed V of setting for choosing different-thickness T
Under the conditions of, integral panel structural member cloudburst test is carried out, the integral panel structural member external surface radius of curvature R after measuring shot-peening,
The corresponding data of several groups thickness T, feed speed V and radius of curvature R are obtained, is fitted using multiple linear regression analysis method thick
Spend the relationship between T, feed speed V and radius of curvature R；
The relationship between thickness T, feed speed V and radius of curvature R obtained according to fitting, is obtained every using step 2
The radius of curvature and thickness of various discrete point in one minimum line of curvature are calculated each in each minimum line of curvature
The corresponding feed speed of discrete point；
The coordinate of various discrete point and feed speed form integral panel contour peening technological parameter on every shot-peening path.
Further preferred embodiment, a kind of integral panel contour peening parameters design method, it is characterised in that:
It obtains in each minimum line of curvature following the steps below after the corresponding feed speed of various discrete point in step 3:
Step 4: for every shot-peening path, according to the corresponding feed speed of wherein discrete point, to close feed speed pair
The discrete point answered merges to form equal strength region and carry out equalization processing:
For i-th shot-peening path Li, with its 1st discrete point P0iAs first equal strength region in the path
Point successively judges remaining discrete point in the shot-peening path, until j-th of discrete point P(j-1)iWith -1 discrete point P of jth(j-2)i
Meet the following conditions:
And
Then using j-th of discrete point as first equal strength region Ei1Terminal, and will include in the equal strength region
The mean value that all discrete points correspond to feed speed is characterized as the feed speed in the region
Wherein VuiFor i-th shot-peening path LiIn the corresponding feed speed of the u+1 discrete point, T is given threshold；
Starting point of the terminal of the above first-class intensity area as next equal strength region, continues equal strength region and draws
Point, until by path LiIt is divided into several equal strength region Eik, and the corresponding machine tool feed in each equal strength region is calculated
Speed
The corresponding extreme coordinates in each equal strength region and region feed speed form integral panel on every shot-peening path
Contour peening technological parameter.
Further preferred embodiment, a kind of integral panel contour peening parameters design method, it is characterised in that:
Given threshold T takes [10%, 12%].
Beneficial effect
The present invention is discrete by planning integral panel shot-peening path and carrying out, and extraction path discrete point is corresponding whole
Body wall slab geomitry information (thickness and radius of curvature)；It establishes integral panel shot-blast process parameter and calculates mathematical model and to shot-peening road
The corresponding shot-blast process parameter (feed speed) of diameter discrete point is calculated, by the shot-blast process parameter of path computing to integral wall
Plate carries out equal strength region division, and the corresponding extreme coordinates in extraction path equal strength region and corresponding shot-blast process parameter
(feed speed) generates the NC instruction that numerically-controlled machine tool can identify, realizes integral panel Digitized manufacturing.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 integral panel Element Design model；
The integral panel shot-peening path Fig. 2 and path discrete point；
Fig. 3 shot-peening path equal strength region division；
Fig. 4 integral panel external surface and equal strength regional implementation；
The creation of external surface reference frame is unfolded in Fig. 5.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment is exemplary, it is intended to it is used to explain the present invention, and
It is not considered as limiting the invention.
The present embodiment, in conjunction with attached drawing, illustrates a kind of integral panel by taking integral panel Element Design model shown in FIG. 1 as an example
The specific implementation process of contour peening parameters design method.
Step 1: extracting the interior shape face S of integral panel Element Design modeli, external surface SoAnd tangential boundary line Lb, according to machine
Bed corresponding band effective width d under the parameters such as fixed injection and bullet flow, to tangential boundary line LbEquidistant partition is carried out,
Obtain tangential boundary line serial variance point P0v, extract boundary discrete method point P0vThe geological information at place
Wherein (x0v, y0v, z0v) be coordinate value,For very shallow curvature value,For very shallow curvature principal direction.
Step 2: the planning in shot-peening path is realized using tracing algorithm and shot-peening path is carried out discrete:
To each discrete point in tangential boundary line, a minimum line of curvature is generated, wherein on tangential boundary line
I-th of discrete point P0i, generate the process of corresponding i-th minimum line of curvature are as follows:
With i-th of discrete point P on tangential boundary line0iAs starting point, corresponding geological information isNext discrete point P on i-th minimum line of curvature is obtained using tracing algorithm1i: setting chases after
Track direction is very shallow curvature direction, and tracing algorithm step-length step is arranged, by
Calculate next discrete point P1iCoordinate (x1i, y1i, z1i), and discrete point P is extracted on integral panel external surface1i
Corresponding very shallow curvature principal directionVery shallow curvature value isObtain discrete point P1iGeological informationRecycle discrete point P1i, found according to tracing algorithm next on i-th minimum line of curvature
Discrete point P2i, until the coordinate of discrete point exceeds integral panel external surface bounds, thus obtain i-th minimum line of curvature
As shot-peening path Li。
And for any discrete point P on i-th minimum line of curvatureui, cross the discrete point and do integral panel external surface method
Line lui, the distance in the normal and integral panel between external surface crosspoint is asked to be denoted as the corresponding thickness T of the discrete pointui, discrete point
Corresponding radius of curvature
Boundary L is traversed using tracing algorithmbAll discrete points complete respective path planning, discrete and to path discrete point
Corresponding informance extracts, and path discrete results are as shown in Figure 2.
Step 3: by the integral panel structural member and the different shot-peening feed speed V of setting for choosing different-thickness T
Under the conditions of, integral panel structural member cloudburst test is carried out, the integral panel structural member external surface radius of curvature R after measuring shot-peening,
The corresponding data of several groups thickness T, feed speed V and radius of curvature R are obtained, is fitted using multiple linear regression analysis method thick
Spend the relationship between T, feed speed V and radius of curvature R.
The present embodiment is using between multiple linear regression analysis method fitting thickness T, feed speed V and radius of curvature R
Relationship is R=14.45T2.0241V0.6914。
The relationship between thickness T, feed speed V and radius of curvature R obtained according to fitting, is obtained every using step 2
The radius of curvature and thickness of various discrete point in one minimum line of curvature are calculated each in each minimum line of curvature
The corresponding feed speed of discrete point.
Step 4: for every shot-peening path, according to the corresponding feed speed of wherein discrete point, to close feed speed pair
The discrete point answered merges to form equal strength region and carry out equalization processing:
For i-th shot-peening path Li, with its 1st discrete point P0iAs first equal strength region in the path
Point successively judges remaining discrete point in the shot-peening path, until j-th of discrete point P(j-1)iWith -1 discrete point P of jth(j-2)i
Meet the following conditions:
And
Then using j-th of discrete point as first equal strength region Ei1Terminal, and will include in the equal strength region
The mean value that all discrete points correspond to feed speed is characterized as the feed speed in the region
Wherein VuiFor i-th shot-peening path LiIn the corresponding feed speed of the u+1 discrete point, T is given threshold；Setting
Threshold value T takes [10%, 12%], depending on specific value is by siding path discrete point feed speed range.
Starting point of the terminal of the above first-class intensity area as next equal strength region, continues equal strength region and draws
Point, until by path LiIt is divided into several equal strength region Eik, and the corresponding machine tool feed in each equal strength region is calculated
Speed
The corresponding extreme coordinates in each equal strength region and region feed speed form integral panel on every shot-peening path
Contour peening technological parameter.
In the present invention, for each equal strength region E that will acquireikBe converted to the position on slab model and its endpoint
Corresponding coordinate P 'ik(x′ik, y 'ik, z 'ik), it can be by by integral panel external surface SoAnd in external surface include it is all etc.
Intensity area EikIt is mapped and is unfolded, obtain integral panel slab mode shape face SuoAnd the equal strength region E ' of expansionik,
Result is unfolded as shown in figure 4, extracting the corresponding extreme coordinates P ' in all equal strength regionsik(x′ik, y 'ik, z 'ik)。
In practical forming process, the three-dimensional system of coordinate where the coordinate system where lathe designs a model with integral panel is different
It causes, the equal strength region E ' extracted under wall panel parts model three-dimensional system of coordinateikExtreme coordinates P 'ik(x′ik, y 'ik, z 'ik) with
Siding slab part corresponds to coordinate difference of the same position under machine tool reference coordinate system in forming process, therefore, can basis
External surface S is unfolded in integral panel in coordinate system in lathe forming processuoIt is upper to establish reference seat identical with lathe forming process
The reference frame of mark system, expansion external surface creation is as shown in Figure 5.To all equal strength region extreme coordinates P ' of acquisitionik
(x′ik, y 'ik, z 'ik) translated, rotating coordinate transformation, by the extreme coordinates P ' of extractionik(x′ik, y 'ik, z 'ik) be transformed to newly
Build corresponding coordinate P " under reference frameik(x″ik, y "ik, 0).In conjunction with the inferior intensity area extreme coordinates P " of newly-built coordinate systemik
(x″ik, y "ik, 0) and the corresponding feed speed in equal strength regionGenerate the NC instruction of control lathe contour peening.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (3)
1. a kind of integral panel contour peening parameters design method, it is characterised in that: the following steps are included:
Step 1: it is discrete to the tangential boundary line progress on integral panel external surface as spacing using shot-peening strip width, it obtains tangential
Boundary line serial variance point P0v, extract boundary discrete method point P0vThe geological information at placeWherein (x0v,
y0v,z0v) be coordinate value,For very shallow curvature value,For very shallow curvature principal direction；
Step 2: to each discrete point in tangential boundary line, a minimum line of curvature is generated, wherein for tangential boundary line
On i-th of discrete point P0i, generate the process of corresponding i-th minimum line of curvature are as follows:
With i-th of discrete point P on tangential boundary line0iAs starting point, corresponding geological information isNext discrete point P on i-th minimum line of curvature is obtained using tracing algorithm1i: setting chases after
Track direction is very shallow curvature direction, and tracing algorithm step-length step is arranged, by
Calculate next discrete point P1iCoordinate (x1i,y1i,z1i), and discrete point P is extracted on integral panel external surface1iIt is corresponding
Very shallow curvature principal directionVery shallow curvature value isObtain discrete point P1iGeological informationRecycle discrete point P1i, found according to tracing algorithm next on i-th minimum line of curvature
Discrete point P2i, until the coordinate of discrete point exceeds integral panel external surface bounds, thus obtain i-th minimum line of curvature
As shot-peening path Li；
And for any discrete point P on i-th minimum line of curvatureui, cross the discrete point and be integral panel external surface normal lui,
The distance in the normal and integral panel between external surface crosspoint is asked to be denoted as the corresponding thickness T of the discrete pointui, the corresponding song of discrete point
Rate radius
Step 3: passing through the condition in the integral panel structural member and the different shot-peening feed speed V of setting of choosing different-thickness T
Under, integral panel structural member cloudburst test is carried out, the integral panel structural member external surface radius of curvature R after measuring shot-peening obtains
The corresponding data of several groups thickness T, feed speed V and radius of curvature R, using multiple linear regression analysis method fitting thickness T,
Relationship between feed speed V and radius of curvature R；
The relationship between thickness T, feed speed V and radius of curvature R obtained according to fitting, each obtained using step 2
The radius of curvature and thickness of various discrete point in the minimum line of curvature, are calculated various discrete in each minimum line of curvature
The corresponding feed speed of point；
The coordinate of various discrete point and feed speed form integral panel contour peening technological parameter on every shot-peening path.
2. a kind of integral panel contour peening parameters design method according to claim 1, it is characterised in that: in step
3 obtain in each minimum line of curvature following the steps below after the corresponding feed speed of various discrete point:
Step 4: corresponding to close feed speed according to the corresponding feed speed of wherein discrete point for every shot-peening path
Discrete point merges to form equal strength region and carry out equalization processing:
For i-th shot-peening path Li, with its 1st discrete point P0iAs the starting point in first equal strength region in the path,
Remaining discrete point in the shot-peening path is successively judged, until j-th of discrete point P(j-1)iWith -1 discrete point P of jth(j-2)iMeet
The following conditions:
AndThen using j-th of discrete point as first equal strength region Ei1
Terminal, and the mean value that all discrete points for including in the equal strength region correspond to feed speed is characterized as to the feeding in the region
Speed
Wherein VuiFor i-th shot-peening path LiIn the corresponding feed speed of the u+1 discrete point, T is given threshold；
Starting point of the terminal of the above first-class intensity area as next equal strength region, continues equal strength region division, directly
Extremely by path LiIt is divided into several equal strength region Eik, and the corresponding machine tool feed speed in each equal strength region is calculated
The corresponding extreme coordinates in each equal strength region and region feed speed form integral panel shot-peening on every shot-peening path
Forming parameters.
3. a kind of integral panel contour peening parameters design method according to claim 2, it is characterised in that: setting threshold
Value T takes [10%, 12%].
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113063690A (en) * | 2021-04-12 | 2021-07-02 | 湖南南方宇航高精传动有限公司 | Method for calculating process parameters of cylindrical gear strengthening shot blasting |
| CN116595827A (en) * | 2023-05-04 | 2023-08-15 | 上海交通大学 | Infinite dimension strip shot peening process planning method and system |
| CN116595827B (en) * | 2023-05-04 | 2024-04-23 | 上海交通大学 | Infinite dimension strip shot peening process planning method and system |
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