CN103252536A - Rolled blade flange head smooth transferring machining method - Google Patents

Abstract

The invention discloses a rolled blade flange head smooth transferring machining method which is used for solving the technical problem that an existing rolled blade flange head machining method is low in efficiency. According to the technical scheme, the rolled blade flange head smooth transferring machining method includes the steps of firstly, measuring a rolled blade sample piece and obtaining a plurality of detection points, building a rolled blade front flange and rear flange molded surface CAD model through a rolled blade CAD model, conducting horizontally moving and matching on the front flange and rear flange molded surface CAD model according to the detection points of the rolled blade sample piece, generating a numerically controlled machining auxiliary line according to the front flange and rear flange molded surface CAD model which is horizontally moved and matched, and finally, achieving smooth transferring of a front rolled blade flange, a rear rolled blade flange and a blade body by adopting four-coordinate numerically controlled machining. The singleton rolled blade flange head machining time in the prior art is reduced from more than 2 hours to within 12 minutes, and machining efficiency is improved.

Description

The slick and sly switching of rolling vane edge head processing method

Technical field

The present invention relates to a kind of rolling vane edge head processing method, particularly the slick and sly switching of a kind of rolling vane edge head processing method.

Background technology

For the processing of rolling vane front and rear edge, compared with developed countries, China also exists big gap on rolling vane processing method, efficient and precision.Industrially developed country generally uses numerical control machining center and numerically control grinder processing rolling vane, make whole working (machining) efficiency, profile geometric accuracy and the surface quality of rolling vane be greatly improved, but these related process equipments relate to national security and market competition needs, and its core technology is also underground.

For the processing of rolling vane front and rear edge, the traditional diamond-making technique that China adopts generally is at first to remove a large amount of overlaps by the line cutting, then by the on-the-spot polishing of pincers worker, polishing, realizes the slyness switching of rolling vane front and rear edges and blade.This traditional diamond-making technique, by range estimation control rolling blade profile shape, production efficiency is low, and single-piece rolling vane process time is more than 2 hours.

Summary of the invention

In order to overcome the existing inefficient deficiency of rolling vane edge head processing method, the invention provides the slick and sly switching of a kind of rolling vane edge head processing method.This method is at first measured the rolling vane exemplar and is obtained some test points, and by rolling vane cad model structure rolling vane front and rear edges profile cad model, according to rolling vane exemplar test point front and rear edges profile cad model is carried out the translation coupling, generate the digital control processing boost line according to the front and rear edges profile cad model after the translation coupling, adopt the 4-coordinate digital control processing to realize the slyness switching of rolling vane front and rear edge and blade at last.Can improve working (machining) efficiency.

The technical solution adopted for the present invention to solve the technical problems is: the slick and sly switching of a kind of rolling vane edge head processing method is characterized in may further comprise the steps:

Step 1, utilize five groups of three coordinate measuring engine measurements with batch rolling vane exemplars, each rolling vane exemplar is measured some groups of cross sections, the cross section is 1～3mm along the X-direction spacing, measures each cross section at four test points of distance front and rear edges 2～3mm place acquisition.

Step 2, according to five groups of measured rolling vane exemplars, the test point on the same cross section is averaged, with the final test point of mean value as the rolling vane exemplar, concrete computational methods are as follows:

$p_i({\stackrel{\‾}{x}}_i,{\stackrel{\‾}{y}}_i,{\stackrel{\‾}{z}}_i)=\left\{\begin{array}{c}{\stackrel{\‾}{x}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{x}_j\\ {\stackrel{\‾}{y}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{y}_j\\ {\stackrel{\‾}{z}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{z}_j\end{array}\right.$

In the formula, i is the test point sequence number, i=1～4; J is rolling vane exemplar numbering, j=1～5; N is rolling vane exemplar number, N=5.

Step 3, according to the determined number of cross sections of measuring process, the rolling vane cad model is divided into six sections, namely leading edge, leading edge leaf pelvic part branch, leading edge blade back part, trailing edge, trailing edge leaf pelvic part are divided and trailing edge blade back part.

Step 4, each section line is added radius respectively at leading edge leaf pelvic part branch, leading edge blade back part, trailing edge leaf pelvic part branch, trailing edge blade back part S length place is that R, arc length are the circumscribed circular arc of L.S=2～4mm wherein, R=3～4mm, L=1～2mm.

Step 5, new front and rear edges curve is carried out translation coupling along Y-axis, makes it satisfy following object function:

$\min f(L_1,L_2)=L_1^2+L_2^2$

In the formula, L ₁Be the distance of test point to new leading edge curve, L ₂Be the distance of test point to new trailing edge curve;

Step 6, generate new leading edge curve and new trailing edge curve successively, by new leading edge curve and new trailing edge curve, generate the leading edge profile cad model corresponding with the rolling vane exemplar and trailing edge profile cad model.

Step 7, to front and rear edges profile cad model, parameter curves such as respectively outwards biasing 2.5mm, and then extraction generate the digital control processing boost line.

The digital control processing boost line that step 8, combination generate is utilized CAM module establishment 4-coordinate procedure among the UG, selects the ball head knife of Φ 5 for use, generates digital control processing cutter spacing track.

The invention has the beneficial effects as follows: because this method is at first measured the rolling vane exemplar and obtained some test points, and by rolling vane cad model structure rolling vane front and rear edges profile cad model, according to rolling vane exemplar test point front and rear edges profile cad model is carried out the translation coupling, generate the digital control processing boost line according to the front and rear edges profile cad model after the translation coupling, adopt the 4-coordinate digital control processing to realize the slyness switching of rolling vane front and rear edge and blade at last.Single-piece rolling vane edge head process time is reduced in 12 minutes more than 2 hours by background technology, has improved working (machining) efficiency.

Describe the present invention in detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is the inventive method rolling vane cad model to be processed coordinate system schematic diagram of living in;

Fig. 2 is the rolling vane exemplar test point position view of the inventive method processing;

Fig. 3 is the inventive method circumscribed circular arc adding method of rolling vane cad model schematic diagram to be processed;

Fig. 4 is the inventive method rolling vane front and rear edges curvilinear translation schematic diagram to be processed;

Fig. 5 is the inventive method rolling vane front and rear edges profile cad model schematic diagram to be processed;

Among the figure, 1-rolling vane exemplar, 2-test point, 3-rolling vane cad model, the leading edge curve that 4-is new, the trailing edge curve that 5-is new, 6-leading edge profile cad model, 7-trailing edge profile cad model.

The specific embodiment

Following examples are with reference to Fig. 1～5.

1. utilize five groups of same batch rolling vane exemplars 1 of three coordinate measuring engine measurement, each rolling vane exemplar 1 is measured some groups of cross sections, the cross section is 1～3mm along the X-direction spacing, measures each cross section and obtains four test points 2 at distance front and rear edges 2～3mm place.

2. Measurement and Data Processing: according to five groups of measured rolling vane exemplars 1, the test point on the same cross section is averaged, with the final test point of this mean value as the rolling vane exemplar, concrete computational methods are as follows:

$p_i({\stackrel{\‾}{x}}_i,{\stackrel{\‾}{y}}_i,{\stackrel{\‾}{z}}_i)=\left\{\begin{array}{c}{\stackrel{\‾}{x}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{x}_j\\ {\stackrel{\‾}{y}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{y}_j\\ {\stackrel{\‾}{z}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{z}_j\end{array}\right.$

In the formula: i is the test point sequence number, i=1～4; J is rolling vane exemplar 1 numbering, j=1～5; N is rolling vane exemplar 1 number, N=5.

3. according to the determined number of cross sections of measuring process, rolling vane cad model 3 is divided into six sections: be divided into leading edge, leading edge leaf pelvic part branch, leading edge blade back part, trailing edge, trailing edge leaf pelvic part branch, trailing edge blade back part.The following method of concrete employing is divided: with 200 points of the discrete acquisition of blade profile section line, by preparing a computer program, justify match in blade profile section line front and rear edges, cut the blade profile section line at match gained circle with the punishment of blade profile section line point of contact and obtain leading edge, trailing edge, leaf basin, blade back, and leaf basin, blade back are cut apart acquisition leading edge leaf pelvic part branch, leading edge blade back part, trailing edge leaf pelvic part branch, trailing edge blade back part in the place of putting therein.

4. add circumscribed circular arc: it is that R, arc length are the circumscribed circular arc of L that each section line is added radius respectively at leading edge leaf pelvic part branch, leading edge blade back part, trailing edge leaf pelvic part branch, trailing edge blade back part S length place, S=2～4mm wherein, R=3～4mm, L=1～2mm.

5. new leading edge curve 4 and new trailing edge curve 5 are carried out the translation coupling along Y-axis, make it satisfy following object function:

$\min f(L_1,L_2)=L_1^2+L_2^2$

In the formula: L ₁Be the distance of test point to new leading edge curve 4, L ₂Be the distance of test point to new trailing edge curve 5;

Curve after the translation be new can with the front and rear edges curve of the slick and sly switching of rolling vane blade.

6. generate new leading edge curve 4 and new trailing edge curve 5 according to the method described above successively, by new curve, generate leading edge profile cad model 6 and the trailing edge profile cad model 7 corresponding with rolling vane exemplar 1.

7. add corresponding digital control processing boost line: to leading edge profile cad model 6 and trailing edge profile cad model 7, the parameter curves such as 2.5mm, and then extraction of outwards setovering respectively generate the digital control processing boost line.

8. in conjunction with the digital control processing boost line that generates, utilize CAM module establishment 4-coordinate procedure among the UG, select the ball head knife of Φ 5 for use, generate digital control processing cutter spacing track, be treated to nc program in postposition at last.

Claims (1)

1. the slick and sly switching of rolling vane edge head processing method is characterized in that may further comprise the steps:

Step 1, utilize five groups of three coordinate measuring engine measurements with batch rolling vane exemplars, each rolling vane exemplar is measured some groups of cross sections, the cross section is 1～3mm along the X-direction spacing, measures each cross section at four test points of distance front and rear edges 2～3mm place acquisition;

Step 2, according to five groups of measured rolling vane exemplars, the test point on the same cross section is averaged, with the final test point of mean value as the rolling vane exemplar, concrete computational methods are as follows:

$p_i({\stackrel{\‾}{x}}_i,{\stackrel{\‾}{y}}_i,{\stackrel{\‾}{z}}_i)=\left\{\begin{array}{c}{\stackrel{\‾}{x}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{x}_j\\ {\stackrel{\‾}{y}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{y}_j\\ {\stackrel{\‾}{z}}_i=\frac{1}{N}\underset{j=1}{\overset{N}{\mathrm{\Σ}}}{z}_j\end{array}\right.$

In the formula, i is the test point sequence number, i=1～4; J is rolling vane exemplar numbering, j=1～5; N is rolling vane exemplar number, N=5;

Step 3, according to the determined number of cross sections of measuring process, the rolling vane cad model is divided into six sections, namely leading edge, leading edge leaf pelvic part branch, leading edge blade back part, trailing edge, trailing edge leaf pelvic part are divided and trailing edge blade back part;

Step 4, each section line is added radius respectively at leading edge leaf pelvic part branch, leading edge blade back part, trailing edge leaf pelvic part branch, trailing edge blade back part S length place is that R, arc length are the circumscribed circular arc of L; S=2～4mm wherein, R=3～4mm, L=1～2mm;

Step 5, new front and rear edges curve is carried out translation coupling along Y-axis, makes it satisfy following object function:

$\min f(L_1,L_2)=L_1^2+L_2^2$

In the formula, L ₁Be the distance of test point to new leading edge curve, L ₂Be the distance of test point to new trailing edge curve;

Step 6, generate new leading edge curve and new trailing edge curve successively, by new leading edge curve and new trailing edge curve, generate the leading edge profile cad model corresponding with the rolling vane exemplar and trailing edge profile cad model;

Step 7, to front and rear edges profile cad model, parameter curves such as respectively outwards biasing 2.5mm, and then extraction generate the digital control processing boost line;

The digital control processing boost line that step 8, combination generate is utilized CAM module establishment 4-coordinate procedure among the UG, selects the ball head knife of Φ 5 for use, generates digital control processing cutter spacing track.

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