阅读说明：本技术 单机免算点自动化找正加工方法 (Single machine calculation-free automatic alignment processing method ) 是由 初宏嘉 扈博琴 韩跃 冯妍婷 康庚 王金铁 刘述明 李秀平 单兴东 刘琪 于 2020-04-03 设计创作，主要内容包括：本发明属于数控加工技术领域,具体地涉及单机免算点自动化找正加工方法。通过使用自制测头采点程序,及根据不同加工要求设计的计算公式。实现点位采集和坐标系偏移角度点位的自动计算。以解决目前生产准备过程中人工点位找正计算偏移量,易有误差及效率慢的技术问题。数控加工中心使用测头找正后直接输入设备操作系特定区域,实现自动生成所需参数,程序自动读取,不需人为干预,降低了出错率,节省了时间,提高了生产效率。(The invention belongs to the technical field of numerical control machining, and particularly relates to a single-machine calculation-free automatic alignment machining method. The self-made measuring head point collecting program is used, and a calculation formula is designed according to different processing requirements. And point location acquisition and automatic calculation of coordinate system offset angle point location are realized. The method solves the technical problems that in the existing production preparation process, manual point location alignment calculation offset is easy to have error and is low in efficiency. The numerical control machining center directly inputs the parameters into the specific area of the equipment operation system after the alignment of the measuring head, so that the required parameters are automatically generated, programs are automatically read, manual intervention is not needed, the error rate is reduced, the time is saved, and the production efficiency is improved.)

1. The single machine calculation-free point automatic alignment processing method is characterized by comprising the following steps of:

the method comprises the following steps:

1) point location acquisition is carried out on the machine tool by using a point location acquisition tool, and the point location acquisition tool is input into specified parameters;

firstly, acquiring point positions by using a point position acquisition device;

inputting the parameters specified by the machine tool for subsequent calling;

2) calculating a rotation angle calculation subroutine by using one central point position and the other angular point position, and calculating the workpiece; when the method is applied to programming, a point A at a central point is changed into a zero point, and a point B at another point in a coordinate system is used as an auxiliary reference, and the angle of a straight line formed by the point B relative to a theoretical coordinate system is alpha; when the workpiece A 'B' is placed on a machine tool, the included angle formed by a straight line formed by the workpiece A 'B' and an actual machine tool coordinate system is beta; calculating a relative rotation angle mu between the theoretical coordinate system and the actual coordinate system through the angle difference; knowing coordinates of point A (point A X, point A Y) and coordinates of point B (point B X, point B Y); obtaining the coordinates of the point A '(point A' X and point A 'Y) and the point B' (point B 'X and point B' Y) from a drawing;

automatically calculating the angle deviation mu between the actual coordinate system and the drawing coordinate system of the drawing theory A B hole;

content of calculation formula

The angle alpha is the angle between the actual point and the horizontal and is equal to ATAN2(Y value of point B-point A Y, X value of point B-point A-point X);

the angle beta is the theoretical point and the horizontal included angle is equal to ATAN2 (the Y value of the B 'point is-A' point Y, and the B 'point is X-A' point X);

the rotation angle mu of the coordinate system is equal to the angle beta-angle alpha;

meanwhile, the length difference between theory and reality is calculated, and a variable output calculation angle is set;

the theoretical length AB line length is equal to SQRT ((B point Y value-A point Y) square + (B point X-A point X) square);

the actual length A 'B' line length is equal to SQRT ((B 'point Y value-A' point Y) squared + (B 'point X-A' point X) squared);

the general system comprises the following steps:

step one, adding macro program instruction capable of parameter transmission

Step two, adding theoretical coordinate values through variables

Step three gives zero-offset code to be referred to

After the program is operated, the angle outputs a fixed position so as to be called in the main program;

the angle output R2 is the rotation angle, and the rotation can be carried out by using ROT in the program;

3) automatically bringing the calculated rotation angle and the center offset point position into corresponding parameters of the machine tool through system variables; and then, the subsequent processing program can be processed at the correct position, and automatic point calculation and alignment are realized.

2. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein:

and 1) programming a point location measurement program by using a high-speed jump instruction in a FANUC system in the step one.

3. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: and 1) in the step two, the measured point positions are transmitted to the parameters of the appointed machine tool by using a parameter transmission function, so that the subsequent calculation subprogram can be called conveniently.

4. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: and 2) performing sub-programming on the dot position calculation formula in the step one according to the system.

5. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: and 2) in the first step, the subprogram is instructed through a parameter transmission function of the numerical control system.

6. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: the general system operation mode in 1) is used by taking a Siemens system as an example, and comprises the following steps:

Extern L910(REAL,REAL,REAL)

l910 (measuring diameter, speed, input offset zero)

Two point measurements are made, for example, the first point a input G54 and the second point input G55 is measured at 50 a velocity of 100.

7. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: the general system operation mode in 2) is used by taking a Siemens system as an example, and comprises the following steps:

pre-machining-program addition calculation instruction

Subroutine parameter call is guided in main program of EXTERN L8103(REAL, REAL, REAL)

P _ UIFR [3, X, TR ] ═ the theoretical centre point coordinate value X

P _ UIFR [3, Y, TR ] ═ the theoretical center point coordinate value Y

P _ UIFR [4, X, TR ] ═ theoretical angular point coordinate value X

P _ UIFR [4, Y, TR ] ═ theoretical angular point coordinate value Y

L8103(3,4,1,2)

The angle output R2 is the rotation angle that can be rotated using the ROT during the procedure.

8. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: and 3) automatically inputting the result of the calculation of the subprogram into a machine tool system by using numerical control system variables.

9. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: the calculation of the angle in the calculation program in the step one of 2) uses ATAN2(Y, X).

10. The stand-alone computation-free point automatic alignment processing method according to claim 1, wherein: and 2) calculating the length of the theoretical length AB line in the program in the step one, wherein if the difference of the calculation results of the length of the actual length A 'B' line is large, the inputted point position has errors.

Technical Field

The invention belongs to the technical field of numerical control machining, and particularly relates to a single-machine calculation-free automatic alignment machining method.

Background

For an aviation case product, a plurality of special-shaped parts need to calculate the coordinate and angle offset of the actual coordinate system and the theoretical coordinate system of the workpiece through the central point position of the hole system. In the traditional method, a lever dial indicator is used for point position alignment, theoretical coordinates and actual coordinates are input through CAM software, and finally coordinate offset angles and offset are calculated. The calculated and output result also needs to teach parameters of the machine tool manually, the input and output are manual operations, errors are prone to occurring, and the whole process is complicated. There is a need for a program with point location automatic acquisition and calculation functions, which automatically performs point location alignment calculation and input, so that production preparation is automated, and production efficiency is improved.

Disclosure of Invention

The invention aims to provide a single machine calculation-free point automatic alignment processing method, which adopts a self-made measuring head point collecting program and a calculation formula designed according to different processing requirements. And point location acquisition and automatic calculation of coordinate system offset angle point location are realized.

The method solves the technical problems that in the existing production preparation process, manual point location alignment calculation offset is easy to have error and is low in efficiency.

Technical scheme

Single machine calculation-free automatic alignment processing method

The method comprises the following steps:

1) point location acquisition is carried out on the machine tool by using a point location acquisition tool, and the point location acquisition tool is input into specified parameters;

step one, using a point position acquisition device to acquire point positions

And step two, inputting the parameters specified by the machine tool for subsequent calling.

2) And calculating a rotation angle calculation subprogram by using one central point position and the other angular point position to calculate the workpiece. When the method is applied to programming, a point A at the center point is used as a zero point, and a point B at another point in a coordinate system is used as an auxiliary reference, and the angle of a straight line formed by the point B relative to a theoretical coordinate system is alpha. When the workpiece A 'B' is placed on the machine tool, the included angle formed by the straight line formed by the workpiece A 'B' and the actual machine tool coordinate system is beta. And calculating the relative rotation angle mu between the theoretical coordinate system and the actual coordinate system through the angle difference. The coordinates of point a (point a X, point a Y) and point B (point B X, point B Y) are known. The coordinates of point A '(point A' X, point A 'Y) and point B' (point B 'X, point B' Y) are obtained from the drawing.

And automatically calculating the angle deviation mu between the actual coordinate system and the drawing coordinate system where the drawing theory AB hole is located.

Content of calculation formula

Angle alpha is the angle between the actual point and the horizontal equal to ATAN2 (point B Y-A Y, point B X-A X)

Angle beta is the theoretical point and the horizontal included angle is equal to ATAN2(B 'point Y value-A' point Y, B 'point X-A' point X)

The rotation angle mu of the coordinate system is equal to the angle beta-angle alpha

Simultaneously, the length difference between theory and reality is calculated, and a variable output calculation angle is set

The theoretical length AB line length is equal to SQRT (the value of point B Y-the square of point A Y + (the square of point B X-the square of point A X))

The actual length A 'B' line length is equal to SQRT (square of (B 'point Y value-A' point Y) + (B 'point X-A' point X))

The general system comprises the following steps:

step one, adding macro program instruction capable of parameter transmission

Step two, adding theoretical coordinate values through variables

Step three gives zero-offset code to be referred to

After running the program, the angle will output the fixed position to be called in the main program

The angle output R2 is the rotation angle, and the rotation can be performed by using ROT in the program

3) Automatically bringing the calculated rotation angle and the center offset point position into corresponding parameters of the machine tool through system variables; and then, the subsequent processing program can be processed at the correct position, and automatic point calculation and alignment are realized.

And 1) programming a point location measuring program by using a high-speed jump instruction in a FANUC system (a measuring instruction in a SIEMENS system) in the first step.

And 1) in the step two, the measured point positions are transmitted to the parameters of the appointed machine tool by using a parameter transmission function, so that the subsequent calculation subprogram can be called conveniently.

Performing sub-programming on the dot position calculation formula in the step 2) according to the system

2) in the first step, the subprogram is instructed through the parameter transmission function of the numerical control system

The general system operation mode in 1) is used by taking a Siemens system as an example, and comprises the following steps:

Extern L910(REAL,REAL,REAL)

l910 (measuring diameter, speed, input offset zero)

Two point measurements are made, for example, the first point a input G54 and the second point input G55 is measured at 50 a velocity of 100.

The step one, the step two and the step three general system operation mode in the step 2) takes a Siemens system as an example and is used as follows:

pre-machining-program addition calculation instruction

Subroutine parameter call is guided in main program of EXTERN L8103(REAL, REAL, REAL)

P _ UIFR [3, X, TR ] ═ the theoretical centre point coordinate value X

P _ UIFR [3, Y, TR ] ═ the theoretical center point coordinate value Y

P _ UIFR [4, X, TR ] ═ theoretical angular point coordinate value X

P _ UIFR [4, Y, TR ] ═ theoretical angular point coordinate value Y

L8103(3,4,1,2)

The angle output R2 is the rotation angle, and the rotation can be performed by using ROT in the program

The result of the sub-program calculation is automatically input into the machine tool system by using numerical control system variables in the step 3)

The calculation of the angle in the 2) step one calculation procedure uses ATAN2(Y, X). This is a function of siemens and FANUC identification to calculate the point location angle with respect to the horizontal.

And 2) calculating the length of the theoretical length AB line in the program in the step one, and if the calculated result of the length of the actual length A 'B' line is greatly different, the inputted point position has error

Technical effects

The numerical control machining center directly inputs the parameters into the specific area of the equipment operation system after the alignment of the measuring head, so that the required parameters are automatically generated, programs are automatically read, manual intervention is not needed, the error rate is reduced, the time is saved, and the production efficiency is improved.

Drawings

FIG. 1 is a formula diagram of the method for automatically aligning;

FIG. 2 is a view showing the constitution of the automatic alignment method;

FIG. 3 is a flow chart of the automatic Zhao square method.

Detailed Description

Firstly, the measuring head is moved to the approximate middle position of the hole to be aligned

Calling self-made probe program in MDI

Siemens System:

Extern L910(REAL,REAL,REAL)

l910 (measuring diameter, speed, input offset zero)

Two points are then measured, for example, a first point A input G54 a second point input G55 is measured at 50 a speed of 100

Then the two measurement procedures are

L910(50,100,1)

L910(50,100,2)

The self-made subprogram executed in the background is as follows:

PROC L910(REAL CRD, REAL JGF, REAL LDG) SAVE defines subroutine parameters

R2 ═ CRD; value assignment of celling banking to variable

R3 ═ JGF; sudu assigns values to variables

R4 ═ LDG; lingdian assigns values to variables

R2 ═ R2/2 assignment to variables

R60 ═ AA _ IM [ X ] extracts current coordinates using system variables

Extracting current coordinates using system variables from R61 ═ AA _ IM [ Y ]

R62 ═ AA _ IM [ Z ] uses system variables to extract current coordinates

SPOS ═ 0 spindle orientation

MEAS-1 SUPA G1X-R60 + R2F-R3 point location measurement using MEAS functionality

STOPRE recording

G91 incremental mode

SUPA G1X ═ 1.5F100 backoff

MEAS-1 SUPA G1X-2F-100 Point location re-measurement Using MEAS function

STOPRE recording

Extracting one-way point position value from R10 $ AA _ MM1[ X ]

G90 SUPA G1X R60F R3 move to a central position

STOPRE

G4 F1

SPOS 180 degree spindle rotation

G4F 1 pause

MEAS 1SUPA G1X R60R 2F R3 point location measurement using MEAS functionality

STOPRE is followed as above

G91

G1 SUPA X＝1.5 F100

MEAS＝1 SUPA G1 X＝-2 F100

STOPRE

L900

R20＝$AA_MM1[X]

After the two-point measurement in the R11 ═ R20+ R10/2X direction is finished, the midpoint is calculated

G4 F1

The Y direction was measured as above after G90 SUPA G1X R11Y R61F R3

G4 F1

SPOS＝0

G4 F1

MEAS＝1 SUPA G1 Y＝R61+R2 F＝R3

STOPRE

G91

SUPA G1 Y＝-1.5 F100

MEAS＝1 SUPA G1 Y＝2 F100

STOPRE

L900

R30＝$AA_MM1[Y]

G90 SUPA G1 Y＝R61 F＝R3

STOPRE

G4 F1

SPOS＝180

G4 F1

G90

MEAS＝1 SUPA G1 Y＝R61-R2 F＝R3

STOPRE

G91 G1 SUPA Y＝1.5 F100

MEAS＝1 SUPA G1 Y＝-2 F100

STOPRE

L900

R40＝$AA_MM1[Y]

Calculating the Y-direction center position by using R12 ═ R30+ R40/2

G90 SUPA G1X R11Y R12F R3 moves to a central position

Assigning a zero offset X position to be assigned by an operator in machine tool parameters according to P _ UIFR [ R5, X, TR ] ═ R11

Assigning a zero offset Y position to be assigned by an operator in machine tool parameters according to P _ UIFR [ R5, Y, TR ] ═ R12

M17

Adding calculation instruction before post-processing program

Subroutine parameter call is guided in main program of EXTERN L8103(REAL, REAL, REAL)

P _ UIFR [3, X, TR ] ═ the theoretical centre point coordinate value X

P _ UIFR [3, Y, TR ] ═ the theoretical center point coordinate value Y

P _ UIFR [4, X, TR ] ═ theoretical angular point coordinate value X

P _ UIFR [4, Y, TR ] ═ theoretical angular point coordinate value Y

L8103(3,4,1,2) assigns transmission parameters of 1, G542, G55 to previous positions of data collected by measuring head, and the guiding subprogram extracts

M0

T...

G54

The ROT command rotation angle of the coordinate system of ROT Z-R2 is a fixed variable R2 output by the subprogram

..

M30

The self-made subprogram executed in the background is as follows:

PROC L8103(REAL L _3, REAL L _4, REAL L _1, REAL L _2) SAVE subroutine definition and SAVE

Def REAL _ R2, _ R3, _ R4, _ R5, _ R6, _ R7, _ R8, _ R9, _ R10, _ R1 define the variables used in the subroutine

Def REAL _ R12, _ R13, _ R14, _ R15, _ R16, _ R17, _ R18, _ R19, _ R11 define the variables used in the subroutine

(ii) a SAN ZHOU SUANDIAN JIAOXIANG uses custom program variables to effectively avoid variable conflicts in main programs

P-UIFR L3, X, TR < R2 > extracts the desired data from the zero offset

P UIFR L3, Y, TR < R3 > extracts the desired data from the zero offset

P-UIFR L-4, X, TR < R4 > extracts the desired data from the zero offset

P-UIFR L-4, Y, TR < R5 > extracts the desired data from the zero offset

Extracting desired data from zero offset with _R6 ═ P _ UIFR [ L _1, X, TR ]

P-UIFR L-1, Y, TR < R7 > extracts the desired data from the zero offset

Extract the desired data from the zero offset, _ R8 ═ P _ UIFR [ L _2, X, TR ]

Extract the desired data from the zero offset, _ R9 ═ P _ UIFR [ L _2, Y, TR ]

ATAN2 in the numerical control system for calculating the angle by using R10 (ATAN 2 (R5-R3 and R4-R2) directly calculates the angle value

ATAN2 in the numerical control system for calculating the angle by using R11 (ATAN 2 (R9-R7 and R8-R6) directly calculates the angle value

R13-SQRT ((_ R5-R3) (_ R5-R3) + (_ R4-R2) (_ R4-R2)) calculates the theoretical distance between two points

R14 SQRT ((_ R9- _ R7) (_ R9- _ R7) + (_ R8- _ R6) (_ R8- _ R6)) calculates the actual distance between the two points

R12 ═ R11 —, R10 yields the angle of rotation

IF_R12<180GOTOF N200

_R12＝_R12-360

N200 IF_R12>-180GOTOF N300

_R12＝360+_R12

Outputting a relatively small angle, e.g., -15 ° and 345 °, as an actual rotation angle according to operator's habit, where the output is determined to be-15 ° and is relatively small in number

N300_ R1 ═ R14 output actual length

The R3-R13-R14 output length difference is used for an operator to judge whether the reference is in accordance with the machining condition normally

R2 ═ R12 output angle value

M17 subprogram ending jump back to main program

If the calculated theoretical length and actual length difference R3 is very large, there is a possibility that an error may occur in the point location input. Or the workpiece has a quality problem before machining.