1. A processing method for automatically adjusting the edge shape of a die forging blade is characterized by comprising the following steps:

step 1: obtaining a blade theoretical model;

step 2: creating N sections, wherein normal vectors of the N sections are parallel to a blade stacking axis of a blade theoretical model, density coefficients of the sections of the N sections meet a first preset range, and N is a positive integer not less than 2;

and step 3: the N sections are intersected with the blade profile of the blade theoretical model to obtain N intersecting curves, wherein any intersecting curve is named as S_iAt S_iThere is any adjacent P₁、P₂And P₃Three points, and when the line P is straight₂P₁Length of (d) and straight line P₂P₃Satisfies the preset value and the straight line P₂P₁And a straight line P₂P₃When the included angle of (D) satisfies a second preset range, then P₂Points being demarcation points, S_iThere are four demarcation points;

and 4, step 4: passing S through four demarcation points_iIs divided into four parts which are respectively leaf back curves C₁Inlet edge curve C₂Leaf basin curve C₃And exhaust side curve C₄；

And 5: constructing a straight line Lin2 and a gas inlet side curve C₂Tangent to obtain an air inlet edge position model; construction of the Lin4 straight line and the exhaust edge curve C₄Tangent to obtain an exhaust edge position model;

step 6: constructing an intake edge extension position model based on the intake edge position model; constructing an exhaust edge extension position model based on the exhaust edge position model;

and 7: by means of model of the position of the air inlet edge extension, blade back curve C₁Heye basin curve C₃Rounded to form an inlet edge arc Cir₂(ii) a By extending the position model, blade back curve C, of the exhaust edge₁Heye basin curve C₃Rounded to form an exhaust edge arc Cir₄；

And 8: at the inlet edge of the arc Cir₂In the construction process, a leaf back curve C is constructed₁Heye basin curve C₃The linear extension of the two ends becomes curve C5 and curve C respectively₇By means of a connection C₅、Cir₂、C₆And Cir₄Obtaining a first complete section line;

and step 9: operating the N sections according to the method in the step 6-8 to obtain N first complete section lines, and constructing a blade body edge extension process model through the N first complete section lines;

step 10: curve C at the inlet edge₂Taking three points P_C1、P_C2And P_C3Through P_C1、P_C2And P_C3Forming an inlet edge arc Cir₆(ii) a Curve C at the exhaust side₄Taking three points P_C4、P_C5And P_C6Through P_C4、P_C5And P_C6Constructing the discharge edge arc Cir₈；

Step 11: constructing an air inlet edge thickening position model based on the air inlet edge position model; constructing an exhaust edge thickening position model based on the exhaust edge position model;

step 12: leaf back curve C is pruned by taking air inlet and outlet edge thickening position equation as boundary constraint₁Heye basin curve C₃To obtain a curve C₉And curve C₁₁；

Step 13: based on the arc Cir of the air inlet edge₆And a discharge edge arc Cir₈Offset configuration inlet edge thickening arc Cir₁₀And a discharge edge arc Cir₁₂Thickening Cir the inlet edge₁₀And the air inlet edge arc Cir₆Difference in arc radii or discharge edge arc Cir₁₂And the discharge edge arc Cir₈The difference between the radii of the circular arcs is recorded as the edge thickening value Delta_R；

Step 14: constructing spline curve Caux₁Spline curve Caux₁Satisfy one end thereof and C₉Is connected with Cir at the other end₁₀A condition of tangency; constructing spline curve Caux₂，Caux₂Satisfy one end and C₁₁Is connected with Cir at the other end₁₀A condition of tangency; constructing spline curve Caux₃，Caux₃Satisfy one end and C₁₁Is connected with Cir at the other end₁₂A condition of tangency; constructing spline curve Caux₄，Caux₄Satisfy one end and C₉₁Is connected with Cir at the other end₁₂A condition of tangency;

step 15: are connected in sequence with C₉、Caux₁、Cir₁₀、Caux₂、C₁₁、Caux₃、Cir₁₂And Caux₄Constructing a second complete section line;

step 16: operating the N sections according to the method of the step 10-15 to obtain N second complete section lines, and constructing a blade body edge thickening process model through the N second complete section lines;

and step 17: and compiling a numerical control program based on the blade edge extension process model and the blade edge thickening process model, and automatically adjusting and processing the edge shape of the die forging blade.

2. The method of claim 1, wherein in step 2, the section density coefficient is calculated according to the following formula:

in the formula, H represents the total length of the blade profile; l represents the distance between two adjacent sections; lambda [ alpha ]₁Represents a section density coefficient;

the first preset range is 0.04-0.07.

3. The method of claim 1, wherein in step 3, the line P is defined as the straight line P₂P₁Length of (d) and straight line P₂P₃Length of (d) and the straight line P₂P₁And a straight line P₂P₃Is inserted into the hollow cavityThe formula for the angle is:

tanθ＝(|tanα-tanβ|)/(1+tanα*tanβ)

tanα＝(Y_i-Y_i-1)/(X_i-X_i-1)

tanβ＝(Y_i-Y_i+1)/(X_i-X_i+1)

wherein α represents a straight line P₂P₁The inclination angle of (c); beta represents a straight line P₂P₃The inclination angle of (c); theta denotes a straight line P₂P₁And a straight line P₂P₃The included angle of (A); x_i-1And Y_i-1Represents P₁A spatial point coordinate value; x_iAnd Y_iRepresents P₂A spatial point coordinate value; x_i+1And Y_i+1Represents P₃A spatial point coordinate value; epsilon₁Represents a straight line P₂P₁Length of (d); epsilon₂Represents a straight line P₂P₃Length of (d);

the preset value is 0.1mm, and the second preset range is 165-175 degrees.

4. The method of claim 1, wherein in step 5, the air inlet edge position model is:

b₁＝Y₁-k₁X₁

in the formula, X₁And Y₁A variable representing an inlet edge tangent equation; b₁Expressing the intercept of the tangent equation of the air inlet edge on the Y axis; k is a radical of₁Represents the slope;

the exhaust edge position model is:

b₄＝Y₄-k₂X₄

in the formula, X₄And Y₄A variable representing an exhaust edge tangent equation; b₄Representing the intercept of the exhaust edge tangent equation on the Y axis; k is a radical of₂Indicating the slope.

5. The method of claim 1, wherein in step 6, the model of the position of the extension of the air inlet edge is:

b₃＝Y₃-k₁X₃

in the formula, L_aqIndicating a value of a specific position of the air inlet edge extension; x₃And Y₃A variable representing an intake edge extension equation; b₁Expressing the intercept of the tangent equation of the air inlet edge on the Y axis; b₃Representing the intercept of an intake edge extension position equation on the Y axis; k is a radical of₁Represents the slope;

the model of the exhaust edge extension position is as follows:

b₆＝Y₆-k₂X₆

in the formula, L_ahIndicating a specific position value of the exhaust edge extension; x₆And Y₆A variable representing an intake edge extension equation; b₄Representing the intercept of the exhaust edge tangent equation on the Y axis; b₆Representing the intercept of an intake edge extension position equation on the Y axis; k is a radical of₂Indicating the slope.

6. The method of claim 5, wherein L is L_aq＝0.1～2，L_ah＝0.1～2。

7. The method of claim 1, wherein in step 10, the pass P is P_C1、P_C2And P_C3Forming an inlet edge arc Cir₆The method specifically comprises the following steps:

by P_C1、P_C2And P_C3X, Y of three points and a Z coordinate value construct a circle equation to obtain an air inlet edge arc Cir₆；

The passage P_C4、P_C5And P_C6Constructing the discharge edge arc Cir₈The method specifically comprises the following steps:

by P_C4、P_C5、P_C6X, Y of three points and a circle equation constructed by Z coordinate values obtain an exhaust edge arc Cir₈。

8. The method of claim 1, wherein in step 11, the model of the position of edge thickening of the air inlet edge is:

b₂＝Y₂-k₁X₂

in the formula (d)_aqRepresenting a specific position value of the thickening of the air inlet edge; x₂And Y₂A variable representing an intake edge thickening position equation; b₁Expressing the intercept of the tangent equation of the air inlet edge on the Y axis; b₂Expressing the intercept of an intake edge thickening position equation on a Y axis; k is a radical of₁Represents the slope;

the exhaust edge thickening position model is as follows:

b₅＝Y₅-k₂X₅

in the formula (d)_ahRepresenting specific position values of exhaust edge thickening; x₅And Y₅A variable representing an exhaust edge thickening position equation; b₄Representing the intercept of the exhaust edge tangent equation on the Y axis; b₅Representing the intercept of the exhaust edge thickening position equation on the Y axis; k is a radical of₂Indicating the slope.

9. The method of claim 8, wherein d is a step of automatically adjusting the shape of the blade edge_aq1, 3, 6 or 10, d_ah1, 3, 6 or 10.

10. The method of claim 1, wherein in step 13, the edge thickening Δ is calculated by the method of machining the edge of the blade by die forging_RThe following conditions are satisfied:

0＜△_R＜0.2。

Background

The traditional die forging blade has the following problems when processing the edge shape: because the edge radius of the blade is small, and the general milling mode of the blade profile is spiral milling, when the air inlet and outlet sides are turned over, the shaft A of the machine tool is accelerated and decelerated frequently, and the edge is easy to generate the phenomena of over-cutting, abnormal tool marks and the like; the rigidity of the edge of the blade is weak, and when the position of the cutter is close to the edge, the cutter is easy to vibrate.

In order to solve the above problems, there are two conventional solutions: firstly, increasing procedure allowance of milling a blade profile, and subsequently removing the blade profile by polishing; second, a manual reconstruction of the geometric blade process model is used. The following disadvantages exist with the above method: the manual polishing is adopted, the allowance of the molded surface is increased, the burn probability of the part is increased, and the profile tolerance of the molded surface of the part is easy to be out of tolerance after multiple operations; the manual model reconstruction process is complex, the requirement on the working experience of technicians is high, the current spline processing is not standard, the processing method of each technician is different, data distortion is easily caused, the manual model reconstruction efficiency is low, and a large amount of time is required for the process.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a processing method for automatically adjusting the edge shape of a die forging blade, which can avoid over-cutting and tool vibration caused by the sudden speed reduction of a cutter at the edge of the die forging blade and avoid the problem of thin edge caused by tool back-off, thereby improving the product quality, and having simple operation process and high efficiency.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a processing method for automatically adjusting the edge shape of a die forging blade comprises the following steps:

step 1: obtaining a blade theoretical model;

step 2: creating N sections, wherein normal vectors of the N sections are parallel to a blade stacking axis of a blade theoretical model, density coefficients of the sections of the N sections meet a first preset range, and N is a positive integer not less than 2;

and step 3: the N sections are intersected with the blade profile of the blade theoretical model to obtain N intersecting curves, wherein any intersecting curve is named as S_iAt S_iThere being any adjacentP₁、P₂And P₃Three points, and when the line P is straight₂P₁Length of (d) and straight line P₂P₃Satisfies the preset value and the straight line P₂P₁And a straight line P₂P₃When the included angle of (D) satisfies a second preset range, then P₂Points being demarcation points, S_iThere are four demarcation points;

and 4, step 4: passing S through four demarcation points_iIs divided into four parts which are respectively leaf back curves C₁Inlet edge curve C₂Leaf basin curve C₃And exhaust side curve C₄；

And 5: constructing a straight line Lin2 and a gas inlet side curve C₂Tangent to obtain an air inlet edge position model; construction of the Lin4 straight line and the exhaust edge curve C₄Tangent to obtain an exhaust edge position model;

step 6: constructing an intake edge extension position model based on the intake edge position model; constructing an exhaust edge extension position model based on the exhaust edge position model;

and 7: by means of model of the position of the air inlet edge extension, blade back curve C₁Heye basin curve C₃Rounded to form an inlet edge arc Cir₂(ii) a By extending the position model, blade back curve C, of the exhaust edge₁Heye basin curve C₃Rounded to form an exhaust edge arc Cir₄；

And 8: at the inlet edge of the arc Cir₂In the construction process, a leaf back curve C is constructed₁Heye basin curve C₃The linear extension of the two ends becomes curve C5 and curve C respectively₇By means of a connection C₅、Cir₂、C₆And Cir₄Obtaining a first complete section line;

and step 9: operating the N sections according to the method in the step 6-8 to obtain N first complete section lines, and constructing a blade body edge extension process model through the N first complete section lines;

step 10: curve C at the inlet edge₂Taking three points P_C1、P_C2And P_C3Through P_C1、P_C2And P_C3Structure of the deviceIntake edge arc Cir₆(ii) a Curve C at the exhaust side₄Taking three points P_C4、P_C5And P_C6Through P_C4、P_C5And P_C6Constructing the discharge edge arc Cir₈；

Step 11: constructing an air inlet edge thickening position model based on the air inlet edge position model; constructing an exhaust edge thickening position model based on the exhaust edge position model;

step 12: leaf back curve C is pruned by taking air inlet and outlet edge thickening position equation as boundary constraint₁Heye basin curve C₃To obtain a curve C₉And curve C₁₁；

Step 13: based on the arc Cir of the air inlet edge₆And a discharge edge arc Cir₈Offset configuration inlet edge thickening arc Cir₁₀And a discharge edge arc Cir₁₂Thickening Cir the inlet edge₁₀And the air inlet edge arc Cir₆Difference in arc radii or discharge edge arc Cir₁₂And the discharge edge arc Cir₈The difference between the radii of the circular arcs is recorded as the edge thickening value Delta_R；

Step 14: constructing spline curve Caux₁Spline curve Caux₁Satisfy one end thereof and C₉Is connected with Cir at the other end₁₀A condition of tangency; constructing spline curve Caux₂，Caux₂Satisfy one end and C₁₁Is connected with Cir at the other end₁₀A condition of tangency; constructing spline curve Caux₃，Caux₃Satisfy one end and C₁₁Is connected with Cir at the other end₁₂A condition of tangency; constructing spline curve Caux₄，Caux₄Satisfy one end and C₉₁Is connected with Cir at the other end₁₂A condition of tangency;

step 15: are connected in sequence with C₉、Caux₁、Cir₁₀、Caux₂、C₁₁、Caux₃、Cir₁₂And Caux₄Constructing a second complete section line;

step 16: operating the N sections according to the method of the step 10-15 to obtain N second complete section lines, and constructing a blade body edge thickening process model through the N second complete section lines;

and step 17: and compiling a numerical control program based on the blade edge extension process model and the blade edge thickening process model, and automatically adjusting and processing the edge shape of the die forging blade.

Further, in step 2, the calculation formula of the section density coefficient is as follows:

in the formula, H represents the total length of the blade profile; l represents the distance between two adjacent sections; lambda [ alpha ]₁Represents a section density coefficient;

the first preset range is 0.04-0.07.

Further, in step 3, the straight line P₂P₁Length of (d) and straight line P₂P₃Length of (d) and the straight line P₂P₁And a straight line P₂P₃The calculation formula of the included angle is as follows:

tanθ＝(|tanα-tanβ|)/(1+tanα*tanβ)

tanα＝(Y_i-Y_i-1)/(X_i-X_i-1)

tanβ＝(Y_i-Y_i+1)/(X_i-X_i+1)

wherein α represents a straight line P₂P₁The inclination angle of (c); beta represents a straight line P₂P₃The inclination angle of (c); theta denotes a straight line P₂P₁And a straight line P₂P₃The included angle of (A); x_i-1And Y_i-1Represents P₁A spatial point coordinate value; x_iAnd Y_iRepresents P₂A spatial point coordinate value; x_i+1And Y_i+1Represents P₃A spatial point coordinate value; epsilon₁Represents a straight line P₂P₁Length of (d); epsilon₂Represents a straight line P₂P₃Length of (d);

the preset value is 0.1mm, and the second preset range is 165-175 degrees.

Further, in step 5, the intake edge position model is:

b₁＝Y₁-k₁X₁

in the formula, X₁And Y₁A variable representing an inlet edge tangent equation; b₁Expressing the intercept of the tangent equation of the air inlet edge on the Y axis; k is a radical of₁Represents the slope;

the exhaust edge position model is:

b₄＝Y₄-k₂X₄

in the formula, X₄And Y₄A variable representing an exhaust edge tangent equation; b₄Representing the intercept of the exhaust edge tangent equation on the Y axis; k is a radical of₂Indicating the slope.

Further, in step 6, the model of the extended position of the air inlet edge is:

b₃＝Y₃-k₁X₃

in the formula, L_aqIndicating a value of a specific position of the air inlet edge extension; x₃And Y₃A variable representing an intake edge extension equation; b₁Expressing the intercept of the tangent equation of the air inlet edge on the Y axis; b₃Representing the intercept of an intake edge extension position equation on the Y axis; k is a radical of₁Represents the slope;

the model of the exhaust edge extension position is as follows:

b₆＝Y₆-k₂X₆

in the formula, L_ahIndicating a specific position value of the exhaust edge extension; x₆And Y₆A variable representing an intake edge extension equation; b₄Representing the intercept of the exhaust edge tangent equation on the Y axis; b₆Representing the intercept of an intake edge extension position equation on the Y axis; k is a radical of₂Indicating the slope.

Further, L_aq＝0.1～2，L_ah＝0.1～2。

Further, in step 10, the passing P_C1、P_C2And P_C3Forming an inlet edge arc Cir₆The method specifically comprises the following steps:

by P_C1、P_C2And P_C3X, Y of three points and a Z coordinate value construct a circle equation to obtain an air inlet edge arc Cir₆；

The passage P_C4、P_C5And P_C6Constructing the discharge edge arc Cir₈The method specifically comprises the following steps:

by P_C4、P_C5、P_C6X, Y of three points and a circle equation constructed by Z coordinate values obtain an exhaust edge arc Cir₈。

Further, in step 11, the intake edge thickening position model is:

b₂＝Y₂-k₁X₂

in the formula (d)_aqRepresenting a specific position value of the thickening of the air inlet edge; x₂And Y₂A variable representing an intake edge thickening position equation; b₁Expressing the intercept of the tangent equation of the air inlet edge on the Y axis; b₂Expressing the intercept of an intake edge thickening position equation on a Y axis; k is a radical of₁Represents the slope;

the exhaust edge thickening position model is as follows:

b₅＝Y₅-k₂X₅

in the formula (d)_ahRepresenting specific position values of exhaust edge thickening; x₅And Y₅A variable representing an exhaust edge thickening position equation; b₄Representing the intercept of the exhaust edge tangent equation on the Y axis; b₅Representing the intercept of the exhaust edge thickening position equation on the Y axis; k is a radical of₂Indicating the slope.

Further, d_aq1, 3, 6 or 10, d_ah1, 3, 6 or 10.

Further, in step 13, the edge thickening value Δ_RThe following conditions are satisfied:

0＜△_R＜0.2。

compared with the prior art, the invention has at least the following beneficial effects: the processing method for automatically adjusting the edge shape of the die forging blade provided by the invention realizes automatic extension of a part edge model by researching an edge position automatic reconstruction technology, generates a tool path track by taking the reconstructed model as a drive, staggers the position point of a tool reversing at the solid edge, and avoids over-cutting and tool vibration formed by the tool suddenly reducing the speed at the edge. The thickening position and the numerical value are set, the original curve is trimmed, the position is used as constraint, a quadratic B-spline curve algorithm is adopted, the curve is reconstructed and smoothed, the edge of the part is automatically thickened, the problem of edge thinness caused by cutter back-off is avoided, the product quality is improved, and the operation process is simple and high in efficiency.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of the positional relationship of curves during construction;

FIG. 2 is a secondary development user interface based on UG software the method;

FIG. 3 is a schematic view of a blade body edge extension process model;

FIG. 4 is a schematic view of a blade body edge thickening process model.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As a specific embodiment of the present invention, a processing method for automatically adjusting the edge shape of a die forging blade automatically extends an edge model of a part by automatically reconstructing an edge position, generates a tool path trajectory by using a reconstructed model as a drive, and staggers a position point of a tool at which the tool is reversed at an entity edge, thereby avoiding an over-cut and a tool vibration caused by a sudden speed reduction of the tool at the edge. The thickening position and the numerical value are set, the original curve is trimmed, the position is used as constraint, a secondary B spline curve algorithm is adopted, the curve is reconstructed and smoothed, the automatic thickening of the edge of the part is realized, the edge thinning problem caused by cutter relieving is avoided, and the product quality is improved, and the method specifically comprises the following steps:

step 1: obtaining a blade theoretical model; specifically, using three-dimensional software, the theoretical model of the leaf is opened.

Step 2: creating N sections, wherein normal vectors of the N sections are parallel to a blade stacking axis of a blade theoretical model, density coefficients of the sections of the N sections meet a first preset range, and N is a positive integer not less than 2;

specifically, the calculation formula of the section density coefficient is:

in the formula, H represents the total length of the blade profile; l represents the distance between two adjacent sections; lambda [ alpha ]₁Represents a section density coefficient;

preferably, the first preset range is 0.04-0.07.

And step 3: the N sections are intersected with the blade profile of the blade theoretical model to obtain N intersecting curves, wherein any intersecting curve is named as S_iAt S_iThere is any adjacent P₁、P₂And P₃Three points, and when the line P is straight₂P₁Length of (d) and straight line P₂P₃Satisfies the preset value and the straight line P₂P₁And a straight line P₂P₃When the included angle of (D) satisfies a second preset range, then P₂Points being demarcation points, S_iThere are four demarcation points;

in particular, the straight line P₂P₁Length of (d) and straight line P₂P₃Length of (d) and the straight line P₂P₁And a straight line P₂P₃Equation for the angle of (A) of (B) of (C)₂P₁Length of (d) and straight line P₂P₃Length of (d) and the straight line P₂P₁And a straight line P₂P₃The calculation formula of the included angle is collectively called as a demarcation point model) is:

tanθ＝(|tanα-tanβ|)/(1+tanα*tanβ)

tanα＝(Y_i-Y_i-1)/(X_i-X_i-1)

tanβ＝(Y_i-Y_i+1)/(X_i-X_i+1)

wherein α represents a straight line P₂P₁The inclination angle of (c); beta represents a straight line P₂P₃The inclination angle of (c); theta denotes a straight line P₂P₁And a straight line P₂P₃The included angle of (A); x_i-1And Y_i-1Represents P₁A spatial point coordinate value; x_iAnd Y_iRepresents P₂A spatial point coordinate value; x_i+1And Y_i+1Represents P₃A spatial point coordinate value; epsilon₁Represents a straight line P₂P₁Length of (d); epsilon₂Represents a straight line P₂P₃Length of (d);

preferably, the preset value is 0.1mm, and the second preset range is 165-175 degrees.

And 4, step 4: passing S through four demarcation points_iIs divided into four parts which are respectively leaf back curves C₁Inlet edge curve C₂Leaf basin curve C₃And exhaust side curve C₄。

And 5: constructing a straight line Lin2 and a gas inlet side curve C₂Tangent to obtain an air inlet edge position model; construction of the Lin4 straight line and the exhaust edge curve C₄Tangent to obtain an exhaust edge position model, as shown in fig. 1;

specifically, the intake edge position model is:

b₁＝Y₁-k₁X₁

in the formula, X₁And Y₁A variable representing an inlet edge tangent equation; b₁Expressing the intercept of the tangent equation of the air inlet edge on the Y axis; k is a radical of₁Represents the slope;

the exhaust edge position model is:

b₄＝Y₄-k₂X₄

in the formula, X₄And Y₄A variable representing an exhaust edge tangent equation; b₄Indicating exhaust gasThe intercept of the edge tangent equation on the Y axis; k is a radical of₂Indicating the slope.

Step 6: constructing an intake edge extension position model based on the intake edge position model; constructing an exhaust edge extension position model based on the exhaust edge position model;

specifically, the intake edge extension position model is:

b₃＝Y₃-k₁X₃

in the formula, L_aqIndicating a value of a specific position of the air inlet edge extension; x₃And Y₃A variable representing an intake edge extension equation; b₃Representing the intercept of an intake edge extension position equation on the Y axis;

preferably, L_aq＝0.1～2；

The exhaust edge extension position model is:

b₆＝Y₆-k₂X₆

in the formula, L_ahIndicating a specific position value of the exhaust edge extension; x₆And Y₆A variable representing an intake edge extension equation; b₆Representing the intercept of an intake edge extension position equation on the Y axis;

preferably, L_ah＝0.1～2。

And 7: by means of model of the position of the air inlet edge extension, blade back curve C₁Heye basin curve C₃Rounded to form an inlet edge arc Cir₂(ii) a By extending the position model, blade back curve C, of the exhaust edge₁Heye basin curve C₃Rounded to form an exhaust edge arc Cir₄。

And 8: at the inlet edge of the arc Cir₂In the process of construction, the material is mixed,curve C of leaf back₁Heye basin curve C₃The linear extension of the two ends becomes curve C5 and curve C respectively₇By means of a connection C₅、Cir₂、C₆And Cir₄A first complete section line is obtained.

And step 9: and (4) operating the N sections according to the method in the step 6-8 to obtain N first complete section lines, and constructing a blade body edge extension process model through the N first complete section lines, as shown in fig. 3.

Step 10: curve C at the inlet edge₂Taking three points P_C1、P_C2And P_C3Through P_C1、P_C2And P_C3Forming an inlet edge arc Cir₆；

Preferably, by P_C1、P_C2And P_C3Forming an inlet edge arc Cir₆The method specifically comprises the following steps:

by P_C1、P_C2And P_C3X, Y of three points and a Z coordinate value construct a circle equation to obtain an air inlet edge arc Cir₆；

Curve C at the exhaust side₄Taking three points P_C4、P_C5And P_C6Through P_C4、P_C5And P_C6Constructing the discharge edge arc Cir₈；

Preferably, by P_C4、P_C5And P_C6Constructing the discharge edge arc Cir₈The method specifically comprises the following steps:

by P_C4、P_C5、P_C6X, Y of three points and a circle equation constructed by Z coordinate values obtain an exhaust edge arc Cir₈。

Step 11: constructing an air inlet edge thickening position model based on the air inlet edge position model; constructing an exhaust edge thickening position model based on the exhaust edge position model;

specifically, the intake edge thickening position model is:

b₂＝Y₂-k₁X₂

in the formula (d)_aqRepresenting a specific position value of the thickening of the air inlet edge; x₂And Y₂A variable representing an intake edge thickening position equation; b₂Expressing the intercept of an intake edge thickening position equation on a Y axis;

preferably, d_aq1, 3, 6 or 10;

the exhaust edge thickening position model is:

b₅＝Y₅-k₂X₅

in the formula (d)_ahRepresenting specific position values of exhaust edge thickening; x₅And Y₅A variable representing an exhaust edge thickening position equation; b₅Representing the intercept of the exhaust edge thickening position equation on the Y axis;

preferably, d_ah1, 3, 6 or 10.

Step 12: leaf back curve C is pruned by taking air inlet and outlet edge thickening position equation as boundary constraint₁Heye basin curve C₃To obtain a curve C₉And curve C₁₁。

Step 13: based on the arc Cir of the air inlet edge₆And a discharge edge arc Cir₈Offset configuration inlet edge thickening arc Cir₁₀And a discharge edge arc Cir₁₂Thickening Cir the inlet edge₁₀And the air inlet edge arc Cir₆Difference in arc radii or discharge edge arc Cir₁₂And the discharge edge arc Cir₈The difference between the radii of the circular arcs is recorded as the edge thickening value Delta_R；

Preferably, the edge thickening value Δ_RThe following conditions are satisfied:

0＜△_R＜0.2。

step 14: constructing spline curve Caux₁Spline curve Caux₁Satisfy one end thereof and C₉Is connected with Cir at the other end₁₀A condition of tangency; constructing spline curve Caux₂，Caux₂Satisfy one end and C₁₁Is connected with Cir at the other end₁₀A condition of tangency; constructing spline curve Caux₃，Caux₃Satisfy one end and C₁₁Is connected with Cir at the other end₁₂A condition of tangency; constructing spline curve Caux₄，Caux₄Satisfy one end and C₉₁Is connected with Cir at the other end₁₂The condition of tangency.

Step 15: are connected in sequence with C₉、Caux₁、Cir₁₀、Caux₂、C₁₁、Caux₃、Cir₁₂And Caux₄And constructing a second complete section line.

Step 16: and (5) operating the N sections according to the method in the step 10-15 to obtain N second complete section lines, and constructing a blade body edge thickening process model through the N second complete section lines, as shown in fig. 4.

And step 17: and (3) programming a numerical control program based on the blade edge extension process model and the blade edge thickening process model by using CAM software, and automatically adjusting and processing the edge shape of the die forging blade.

In this embodiment, the CAM software is UG, all the processes are customized by secondary development of UG, and a use interface is shown in fig. 2.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.