CN117688716A - An analysis method and system for European standard wheelset curves - Google Patents

Abstract

The invention discloses an analysis method and system for the European standard wheel set curve, which includes: obtaining the European standard wheel set parameters, press fitting parameters and pressure data, establishing the wheel set curve; and obtaining several points on the established curve. , and analyze the obtained item points according to the preset algorithm to obtain the analysis results. The method of obtaining the analysis results analyzes the wheel set curve. Through the analysis and comparison of the numerical relationship of the curve characteristics, all end points on the wheel set curve are analyzed. , wave peak value, wave trough value, rising section and falling section are all analyzed. The results of the analyzed wheel set curve are more accurate. Points or line segments that do not meet the requirements can be more accurately identified, which improves the quality of wheel set press-fitting and the wheel set curve. The judgment system and method are simple to operate and easy to use. They can automatically and accurately judge whether the curve meets the requirements, avoiding product repairs and thus improving the press-fitting efficiency.

Description

An analysis method and system for European standard wheelset curves

Technical field

The invention relates to the technical field of railway vehicle wheel set pressing, and in particular to an analysis system for European standard wheel set curves.

Background technique

The wheel set is a key component of the running part of the railway vehicle, and its press-fitting quality is directly related to the safety of vehicle operation. After the wheel set is pressed, the press-fitting quality is mainly determined by determining the press-fitting curve.

At present, the wheel set press-fitting equipment can only make simple point judgments on the press-fit curve. There is no accurate press-fit curve judgment software. The European standard wheel set press-fit curve mainly relies on manual judgment, and missed judgments and misjudgments occur from time to time. .

Contents of the invention

In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides an analysis method and system for European standard wheel set curves. The determination method is simple to operate, easy to use, and can automatically and accurately determine whether the curve meets the requirements. At the same time, the identification and determination of unqualified points on the curve provide a basis for quality improvement in the subsequent press-fitting process, promote the quality improvement of the wheel set press-fitting, avoid product repairs, and thereby improve the press-fitting efficiency.

The technical solution of the present invention is as follows:

Obtain European standard wheel set parameters, press fitting parameters and pressure data, and establish a wheel set curve;

Obtain several term points on the established curve, analyze the acquired term points according to the preset algorithm, and obtain the analysis results;

When analyzing the wheelset curve, the obtained item points and corresponding formulas are:

Maximum pressure F _max : F _max =MAX( _Fi )<FMAX;

End pressure F _f : F _f =F _n >FMIN;

Pressure starting position: The pressure starts within 30mm of the relative displacement of the wheel and axle; F＝ _Fi ＞10KN, _Si≤30mm ;

End tonnage reduction range: the tonnage reduction range from the curve to the end after reaching the maximum pressing force is less than 25mm, Si _{-S n} <25mm, F _i =F _max , F _n =F _f ;

Tonnage drop at the end: the drop in pressing force to the end after the curve reaches the maximum pressing force is ≤50KN; F _max -F _f ≤50KN;

Stable section of the curve: detect whether there is a sharp rise in the curve caused by strain during the press-fitting process, |F _i+1 -F _i |≤20KN, 30mm≤S _i ≤S _n ;

Rising section of the curve: F _i+1 -F _i ≥ 0, 30mm ≤ S _i ≤ S _j , F _j ＝ F _max ;

Straight line length segment: If there is a straight line on the curve, the length of the straight line is less than 10% of the length of the curve;

In the above formula, (Fi _{, Si} ) means that the pressing force is F _i when the moving distance of the pressing process is _Si , the curve length is _Sn , FMAX is the theoretical maximum pressing force, and F is the starting pressure value. F _f is the end pressure, FMIN is the theoretical minimum press force, Fmax is the actual maximum press force, Fmin is the actual minimum press force, F _f is the end pressure, F _i is the pressure value at any i position after the starting point on the curve, F _i+1 is the pressure value at any i+1 position after the starting point on the curve, S _i is the position at any i on the curve, S _i+1 is the position after i+1 after any Si _i on the curve, S _j is the curve At any position j after position i on the upper curve, F _j is the pressure value at any position j after position i on the curve;

Through the analysis and comparison of the numerical relationships of the curve characteristics, all endpoints, peak values, trough values, rising sections and falling sections on the wheel set curve are analyzed. The results of the analyzed wheel set curve are more accurate and can more accurately identify inaccuracies. Points or line segments that meet the requirements improve the wheel set press-fit quality.

Furthermore, it also includes analysis of the pressure characteristics of the wheelset curve, including:

Pressure after passing the oil tank: The maximum pressure reached before reaching the oil filling tank should reappear within the range of 25mm of continued displacement after the tonnage reduction begins, F _j ≥ F _i , S _j = S _i +25mm;

Overall pressure characteristics: The pressure value on the curve should be located above the line connecting the starting rising point of the curve and the minimum pressing force, except for the position of the oil injection hole; ( _Fi /S _i )> (FMIN/S _n -S _i ), F _{i +1} ≥0; F _i =0;

Initial pressure steep rise length: If there is a steep rise in the initial stage within the 30mm range of the curve due to the surface quality of the wheel and axle mating parts, the steep rise length should be less than 10% of the curve length; S _i <10% S _n , 0 ＜S _i ＜S _j ＜30mm, F _j ＜F _i ;

In the above formula, (Fi _{, Si} ) means that the pressing force is F _i when the moving distance of the pressing process is _Si , the curve length is _Sn , FMAX is the theoretical maximum pressing force, and F is the starting pressure value. F _f is the end pressure, FMIN is the theoretical minimum press force, Fmax is the actual maximum press force, Fmin is the actual minimum press force, F _f is the end pressure, F _i is the pressure value at any i position after the starting point on the curve, F _i+1 is the pressure value at any i+1 position after the starting point on the curve, S _i is the position at any i on the curve, S _i+1 is the position after i+1 after any Si _i on the curve, S _j is the curve At any position j after position i, F _j is the pressure value at any position j after position i on the curve.

Furthermore, it also includes the area of the closed curve characteristic box formed based on the maximum deviation of the judgment point. The actual wheelset curve is completely inside the curve characteristic box, except for the oil injection groove, and the output is directly displayed in the area of the curve characteristic box. The analysis results of the wheel set curve improve the analysis efficiency of the wheel set curve.

Further, after obtaining the European standard wheel set parameters, press fit parameters and pressure data, the press fit force setting method is selected according to the given size of the press fit force, and the wheel set with the given maximum press fit force and minimum press fit force is selected. Select the maximum and minimum press-fitting force to directly input the obtained press-fitting parameters. For an unspecified wheel pair, select the wheel base diameter to calculate the press-fitting force, and then set the maximum press-fitting force coefficient and the minimum press-fitting force coefficient.

Further, the obtained wheel set parameters include wheel set product model, wheel seat diameter, press fitting direction, axle number and wheel number.

In a second aspect, the present invention also provides an analysis system for European standard wheelset curves, including:

The wheel set curve creation module is used to obtain European standard wheel set parameters, press fitting parameters and pressure data, and establish the wheel set curve;

The result analysis module acquires several item points on the established curve, analyzes the acquired item points according to the preset algorithm, and obtains the analysis results.

The main advantages of the technical solution of the present invention are as follows:

An analysis method for the European standard wheel set curve of the present invention establishes the wheel set curve by obtaining the European standard wheel set parameters, press fitting parameters and pressure data; and compares the established wheel set curve with the theoretical wheel set curve. Yes; analyze the wheel set curve characteristics, analyze the linear and numerical relationship between the wheel set curve and the theoretical wheel set curve according to the comparison results, analyze the wheel set curve using the method of obtaining the analysis results, and determine the wheel set curve judgment system and judgment The method is simple to operate and easy to use, and can automatically and accurately determine whether the curve meets the requirements. At the same time, the identification and determination of unqualified points on the curve provide a basis for quality improvement in the subsequent press-fitting process, promote the quality improvement of the wheel set press-fitting, and avoid product repairs. , thereby improving the press installation efficiency.

Description of the drawings

The drawings described here are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a flow chart of an analysis method for European standard wheelset curves according to the present invention;

Figure 2 is a schematic diagram of the ideal curve and the curve characteristic box used for the analysis method of the European standard wheel pair curve provided by one embodiment of the present invention;

FIG. 3 is a schematic flow chart of an analysis method for European standard wheelset curves provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

As shown in Figures 1-3, embodiments of the present invention provide an analysis method for the European standard wheel set curve. The method includes: obtaining the European standard wheel set parameters, press fitting parameters and pressure data, and establishing the wheel set curve. ;

Obtain several term points on the established curve, analyze the acquired term points according to the preset algorithm, and obtain the analysis results;

When analyzing the wheelset curve, the obtained item points and corresponding formulas are:

Maximum pressure F _max : F _max =MAX( _Fi )<FMAX;

End pressure F _f : F _f =F _n >FMIN;

Pressure starting position: The pressure starts within 30mm of the relative displacement of the wheel and axle; F＝ _Fi ＞10KN, _Si≤30mm ;

End tonnage reduction range: the tonnage reduction range from the curve to the end after reaching the maximum pressing force is less than 25mm, Si _{-S n} <25mm, F _i =F _max , F _n =F _f ;

Tonnage drop at the end: the drop in pressing force to the end after the curve reaches the maximum pressing force is ≤50KN; F _max -F _f ≤50KN;

Stable section of the curve: detect whether there is a sharp rise in the curve caused by strain during the press-fitting process, |F _i+1 -F _i |≤20KN, 30mm≤S _i ≤S _n ;

Rising section of the curve: F _i+1 -F _i ≥ 0, 30mm ≤ S _i ≤ S _j , F _j ＝ F _max ;

Straight line length segment: If there is a straight line on the curve, the length of the straight line is less than 10% of the length of the curve;

In the above formula, (Fi _{, Si} ) means that the pressing force is F _i when the moving distance of the pressing process is _Si , the curve length is _Sn , FMAX is the theoretical maximum pressing force, and F is the starting pressure value. F _f is the end pressure, FMIN is the theoretical minimum press force, Fmax is the actual maximum press force, Fmin is the actual minimum press force, F _f is the end pressure, F _i is the pressure value at any i position after the starting point on the curve, F _i+1 is the pressure value at any i+1 position after the starting point on the curve and is located at any position after any position i. S _i is the position at any i on the curve or S _i represents any position after the maximum press-fitting force. Curve position, S _i+1 is the position after i+1 after any Si _i on the curve, S _j is any position j after position i on the curve, F _j is the pressure value at any position j after position i on the curve .

Through the analysis and comparison of the numerical relationships of the curve characteristics, all endpoints, peak values, trough values, rising sections and falling sections on the wheel set curve are analyzed. The results of the analyzed wheel set curve are more accurate and can more accurately identify inaccuracies. Points or line segments that meet the requirements improve the wheel set press-fit quality.

Specifically, the specific European standard in the present invention is: EN 13260 "Railway applications—Wheelsets and bogies—Wheelsets—Product requirement". The included wheelsets include BA319 wheelsets, BA002 wheelsets and BA004 wheelsets.

It should be noted that the basic parameters mainly include product model and wheel seat diameter (dm), of which the wheel seat diameter is mainly used to calculate the press-fitting force range and generate the curve characteristic box. For a wheel set with a given press force range, the maximum press force (FMAX) and minimum press force (FMIN) can be directly set according to the given requirements. For wheel sets that do not have a given press force range and comply with the requirements of the EN13260 standard, it is necessary to set the maximum press force coefficient and the minimum press force coefficient, and calculate the maximum and minimum press force according to the press force coefficient and the wheel seat diameter.

Among them, the maximum and minimum pressing forces are: FMAX=1.45×4dm=5.8dm, FMIN=0.85×4dm=3.4dm.

Specifically, after obtaining the European standard wheel set parameters, press fit parameters and pressure data, the press fit force setting method is selected according to the given size of the press fit force, and the wheel set with the given maximum press fit force and minimum press fit force is selected. Select the maximum and minimum press-fitting force to directly input the obtained press-fitting parameters. For an unspecified wheel pair, select the wheel base diameter to calculate the press-fitting force, and then set the maximum press-fitting force coefficient and the minimum press-fitting force coefficient.

The wheel set parameters obtained include the axle number and wheel number of the axle to be pressed, as well as the wheel pressing direction (left or right).

The original data of the wheel set's press fit curve is the pressure-displacement data automatically generated during the press fit process, which contains two elements: pressure and displacement. The specific expression is: F(S)={(F1,S1),(F2,S2) ,…,(Fi,Si),…(Fn,Sn)};

Among them, ( _Fi ,S _i ) means that when the movement distance of the press-fitting process is _Si , the press-fitting force is F _i and the curve length is S _n .

Specifically, the obtained wheel set parameters include wheel set product model, wheel seat diameter, press fitting direction, axle number and wheel number.

Specifically, the judgment points adopted for the established wheel set curve include: maximum pressure, end pressure, pressure starting outer position, end ton reduction range, pressure stable curve segment, pressure rising segment, and the length of the straight line segment in the curve. , the pressure value after passing through the oil tank and the starting pressure range.

Specifically, taking the BA319 wheelset as an example, as an optional implementation of the embodiment of the present invention, the calculation formulas of the item points and budget obtained on the established wheelset curve include:

1) Maximum pressure: The maximum pressure on the curve should be less than the theoretical maximum pressing force.

Specifically, the maximum pressure Fmax: Fmax=MAX( _Fi )<FMAX, where: FMAX is the maximum pressing force.

2) End point pressure: The end point pressure on the curve should be greater than the theoretical minimum pressing force.

End point pressure F _f : F _f = F _n > FMIN, F _n is the pressure at the end point S _n , and FMIN is the minimum pressing force.

3) Pressure starting position: The pressure starting position on the curve does not exceed a specific value.

Pressure starting position: The pressure starts within 30mm of the relative displacement of the wheel and axle.

F＝ _Fi ＞10KN, S _i≤30mm .

4) End ton drop range: When the pressure drops at the end of the curve, the drop length does not exceed a specific value. The tonnage reduction length range from the curve to the end after reaching the maximum pressing force is less than 25mm. in:

S _i -S _n <25mm, F _i =Fmax, F _n =F _f ;

5) End ton drop: When the pressure drops at the end of the curve, the end ton drop does not exceed a specific value.

Specifically, after the curve reaches the maximum pressing force, the decrease value of the pressing force to the end is ≤50KN.

Specifically, Fmax-F _f ≤50KN. Among them, F _f is the end pressure and Fmax is the maximum pressure.

6) Stable pressure: Stable pressure requires that the difference in pressing force between the front and rear adjacent points on the pressing curve is less than a specific value.

It should be noted that the stable section of the curve should be stable except for the initial stage and the position of the oil filling tank. This point is used to detect whether there is a sharp rise in the curve caused by strain during the press-fitting process, where |F _i+1 - F _i |≤20KN, 30mm≤S _i ≤S _n .

7) Pressure rise: Pressure rise refers to the period from the initial stage on the press curve to before the maximum pressure position. The press force should gradually increase without any decrease. The position of the curved oil filling groove is not considered.

It should be noted that: except for the position of the oil injection groove in the rising section of the curve, the middle part of the curve gradually rises. Among them, F _i+1 -F _i ≥ 0, 30mm ≤ S _i ≤ S _j , F _j = Fmax;

8) Straight line length: The straight line length of the curve should not exceed the specific value of the theoretical length of the curve.

Specifically, the length of the straight line: If there is a straight line on the curve, the length of the straight line is less than 10% of the length of the curve.

9) Pressure after passing the oil tank: The pressure after passing the oil tank is required to be greater than the maximum pressure before the curve reaches the oil filling tank and starts to reduce the ton.

Specifically, the maximum pressure reached by the pressure after passing through the oil tank and before reaching the oil injection tank should reappear within the range of 25mm of continued displacement after the tonnage reduction begins. in:

F _j ≥ F _i , S _j = S _i +25mm, S _i is the maximum pressing force reached before reaching the oil filling groove.

10) Pressure characteristics: The point where the curve starts to rise and the point at the end (theoretical minimum press force) are connected in a straight line. All points on the press curve should be above this straight line.

Specifically, for the pressure characteristics, the pressure value on the curve should be located above the line connecting the starting rising point of the curve and the minimum pressing force, except for the position of the oil injection hole. in:

( _Fi /S _i )>(FMIN/S _n -S _i ), F _i +1≥0; F _i =0. FMIN is the minimum pressing force;

11) Initial pressure rise length: The initial pressure rise length is required not to exceed a specific ratio of the theoretical length of the press fitting curve.

Initial pressure rise length: If there is a sudden rise in the initial stage within the 30mm range of the curve due to the surface quality of the wheel and axle mating parts, the steep rise length should be less than 10% of the curve length. in:

_Si <10% _Sn , 0< _Si < _Sj <30mm, _Fj < _Fi .

In the above formula, (Fi _{, Si} ) means that the pressing force is F _i when the moving distance _of the pressing process is Si, the curve length is _Sn , FMAX is the maximum pressing force, F is the starting pressure value, F _f is the end pressure, FMIN is the minimum press force, F _f is the end pressure, F _i is the pressure value at any i position after the starting point on the curve, F _i+1 is the pressure value at any i+1 position after the starting point on the curve, and is the pressure value after i in F _i , Si _i is the position of any i on the curve or _Si represents any curve position after the maximum press-fitting force, S _(i+1) is the position after i+1 after any Si _i on the curve position, S _j is any position j after position i on the curve, F _j is the pressure value at any position j after position i on the curve.

12) Curve characteristics: Based on the wheel seat diameter and theoretical maximum and minimum pressing force information related to the wheel set to be determined, a wheel set press fitting curve characteristic box can be generated. The curve characteristics require that the wheel set press fit curves are all located within the curve characteristics box except for the position of the oil injection groove.

Specifically, when performing curve characteristic analysis, a wheel set press fit curve characteristic box can be generated based on the wheel seat diameter of the wheel set to be determined and the theoretical maximum and minimum press fit force information, and the comparison results are displayed in the characteristic curve box.

As shown in Figure 2, the dotted line in Figure 2 is the wheel set curve;

What needs to be explained is: curve characteristics, set the curve characteristic box according to the curve length, maximum and minimum press-fitting force, the press-fitting curve should all be located within the curve characteristic box, except for the oil injection groove.

Example 2

The judgment process of the European standard wheel set curve analysis system includes three processes: information input, system analysis, and result display to achieve automatic and accurate judgment of the press fitting curve.

1) Information input: Input the product model, wheel seat diameter, press fitting direction, shaft number and wheel number, press fit curve displacement and pressure data; select the press fit force setting method according to the given press fit force situation, and For the wheel set with the maximum and minimum press-fitting force, select the maximum and minimum press-fitting force and directly enter the above parameters. For the wheel set that is not given, select the wheel base diameter calculation method, and then set the maximum press-fitting force coefficient and the minimum press-fitting force. force coefficient.

2) System judgment: judgment is made based on the 12 judgment items in the above-mentioned embodiment 1.

After the above 12 system judgments, the results are displayed: the relevant information of the judged wheelset, the judgment results of each judgment point of the press fitting curve and the comprehensive judgment results are displayed, and the curve graphic is displayed. The press fit curve graphic is displayed at the bottom left of the system interface, wheel set related information and comprehensive judgment results are displayed above the curve graphic, and each judgment item point and judgment result are displayed on the right side of the curve graphic.

In summary, the present invention is an analysis method for the European standard wheel set curve. It obtains the European standard wheel set parameters, press fitting parameters and pressure data, and establishes the wheel set curve; obtains several points on the established curve, and Analyze the obtained item points according to the preset algorithm to obtain the analysis results; the method of obtaining the analysis results is through the maximum pressure, end pressure, pressure starting position, end ton reduction range, end ton reduction, pressure stability, pressure rise , flat straight line length, pressure after passing through the oil tank, pressure characteristics, initial pressure rise length, curve characteristics, etc. 12 items are analyzed to determine whether each item meets the requirements. When all items meet the requirements, the curve is qualified. Otherwise the curve is unqualified. The wheel set curve determination system and method of the present invention are simple to operate. They analyze all special inflection points, end points, critical points and vertices on the wheel set curve, and perform corresponding analysis on the line segments on both sides of the above special points, making the present invention The plan analyzes and studies the overall situation of the wheel set curve, and uses a parameterized judgment method to input the required data into the judgment module or control module for judgment and processing, and then directly outputs the processing results. It is easy to use and can automatically and accurately judge Whether the curve meets the requirements, and the identification and determination of unqualified points on the curve provide a basis for quality improvement in the subsequent press-fitting process, promote the quality improvement of the wheel set press-fit, avoid product repairs, and thereby improve the press-fit efficiency.

Example 3

The invention also provides an analysis system for European standard wheelset curves, including:

The wheel set curve creation module is used to obtain European standard wheel set parameters, press fitting parameters and pressure data, and establish the wheel set curve;

The result analysis module is used to obtain several item points on the established curve, and analyze the obtained item points according to a preset algorithm to obtain analysis results.

It should be noted that in this article, relational terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no such actual relationship or sequence between entities or operations. Furthermore, the terms "comprises," "comprises," or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. In addition, the terms "front", "back", "left", "right", "upper" and "lower" in this article refer to the placement state shown in the accompanying drawings.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be used Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. An analysis method for European standard wheelset curves, which is characterized by including: Obtain European standard wheel set parameters, press fitting parameters and pressure data, and establish a wheel set curve; Obtain several term points on the established curve, analyze the acquired term points according to the preset algorithm, and obtain the analysis results; When analyzing the wheelset curve, the obtained item points and corresponding formulas are: Maximum pressure F _max : F _max =MAX( _Fi )<FMAX; End pressure F _f : F _f =F _n >FMIN; Pressure starting position: The pressure starts within 30mm of the relative displacement of the wheel and axle; F＝ _Fi ＞10KN, _Si≤30mm ; End tonnage reduction range: the tonnage reduction range from the curve to the end after reaching the maximum pressing force is less than 25mm, S _i -S _n <25mm, F _i =F _max , F _n =F _f ; Tonnage drop at the end: the drop in pressing force from the curve to the end after reaching the maximum pressing force is ≤50KN; F _max -F _f ≤50KN; Stable section of the curve: detect whether there is a sharp rise in the curve caused by strain during the press-fitting process, |F _i+1 -F _i |≤20KN, 30mm≤S _i ≤S _n ; Rising section of the curve: F _i+1 -F _i ≥ 0, 30mm ≤ S _i ≤ S _j , F _j ＝ F _max ; Straight line length segment: If there is a straight line on the curve, the length of the straight line is less than 10% of the length of the curve. _Fi = Fi ₊₁ ; In the above formula, (Fi _{, Si} ) means that the pressing force is F _i when the moving distance of the pressing process is _Si , the curve length is _Sn , FMAX is the theoretical maximum pressing force, and F is the starting pressure value. F _f is the end pressure, FMIN is the theoretical minimum press force, Fmax is the actual maximum press force, Fmin is the actual minimum press force, F _f is the end pressure, F _i is the pressure value at any i position after the starting point on the curve, F _i+1 is the pressure value at any i+1 position after the starting point on the curve, S _i is the position at any i on the curve, S _i+1 is the position after i+1 after any Si _i on the curve, S _j is the curve At any position j after position i on the upper curve, F _j is the pressure value at any position j after position i on the curve; Through the analysis and comparison of the numerical relationships of the curve characteristics, all endpoints, peak values, trough values, rising sections and falling sections on the wheel set curve are analyzed. The results of the analyzed wheel set curve are more accurate and can more accurately identify inaccuracies. Points or line segments that meet the requirements improve the wheel set press-fit quality. 2. A method for analyzing the European standard wheel set curve according to claim 1, characterized in that it also includes analyzing the pressure characteristics of the wheel set curve, including: Pressure after passing the oil tank: The maximum pressure reached before reaching the oil filling tank should reappear within the range of 25mm of continued displacement after the tonnage reduction begins, F _j ≥ F _i , S _j = S _i +25mm; Overall pressure characteristics: The pressure value on the curve should be located above the line connecting the starting rising point of the curve and the minimum pressing force, except for the position of the oil injection hole; ( _Fi /S _i )> (FMIN/S _n -S _i ), F _{i +1} ≥0; F _i =0; Initial pressure steep rise length: If there is a steep rise in the initial stage within the 30mm range of the curve due to the surface quality of the wheel and axle mating parts, the steep rise length should be less than 10% of the curve length; S _i <10% S _n , 0 ＜S _i ＜S _j ＜30mm, F _j ＜F _i ; In the above formula, (Fi _{, Si} ) means that the pressing force is F _i when the moving distance of the pressing process is _Si , the curve length is _Sn , FMAX is the theoretical maximum pressing force, and F is the starting pressure value. F _f is the end pressure, FMIN is the theoretical minimum press force, Fmax is the actual maximum press force, Fmin is the actual minimum press force, F _f is the end pressure, F _i is the pressure value at any i position after the starting point on the curve, F _i+1 is the pressure value at any i+1 position after the starting point on the curve, S _i is the position at any i on the curve, S _i+1 is the position after i+1 after any Si _i on the curve, S _j is the curve At any position j after position i, F _j is the pressure value at any position j after position i on the curve. 3. An analysis method for the European standard wheel set curve according to claim 1, characterized in that it also includes an area of a closed curve characteristic frame formed based on the maximum deviation of the determination item point, and the wheel set curve is processed During characteristic analysis, the actual wheel set curve is completely inside the curve characteristic box, except for the oil filling groove, and the analysis results of the output wheel set curve are directly displayed in the area of the curve characteristic box to improve the efficiency of wheel set curve analysis. 4. An analysis method for the European standard wheel set curve according to claim 1, characterized in that, after obtaining the European standard wheel set parameters, press fitting parameters and pressure data, the selected wheel set is selected according to the given size of the press fitting force. Fixed press-fitting force setting method, select the maximum and minimum press-fitting force for a wheel set with a given maximum and minimum press-fitting force and directly input the obtained press-fitting parameters, and select the wheel base diameter for a wheel set that is not given Calculate the size of the press-fitting force, and then set the maximum press-fitting force coefficient and the minimum press-fitting force coefficient. 5. An analysis method for European standard wheel set curves according to claim 1, characterized in that the obtained wheel set parameters include wheel set product model, wheel seat diameter, press fitting direction, axle number and wheel set. Number. 6. An analysis system for European standard wheelset curves, characterized by including: The wheel set curve creation module is used to obtain European standard wheel set parameters, press fitting parameters and pressure data, and establish the wheel set curve; The result analysis module acquires several item points on the established curve, analyzes the acquired item points according to the preset algorithm, and obtains the analysis results.