CN114932455B - Method for automatically eliminating zero-point deviation of multiple sister tools - Google Patents

Method for automatically eliminating zero-point deviation of multiple sister tools Download PDF

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Publication number
CN114932455B
CN114932455B CN202210753179.2A CN202210753179A CN114932455B CN 114932455 B CN114932455 B CN 114932455B CN 202210753179 A CN202210753179 A CN 202210753179A CN 114932455 B CN114932455 B CN 114932455B
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point
value
zero
numerical control
machine tool
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CN114932455A (en
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杨林
梁忠效
冯帆
王波
田小康
郑志达
张夏
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AECC Aviation Power Co Ltd
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AECC Aviation Power Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Mechanical Engineering (AREA)
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Abstract

The invention belongs to the technical field of blade manufacturing, and particularly relates to a method for automatically eliminating zero-point deviation of multiple sister tools, which is based on an on-machine measurement technology, clamps a standard measuring tool into the tool according to the structure of the processed blade, establishes a set of algorithm, plans a detection path, automatically calculates deviation values of the standard measuring tool in each reference direction, adopts logic operation, combines the grammar of an operating system frame of a numerical control machine tool to automatically compensate the deviation values, and realizes automatic correction of a processing program, thereby solving the problem of inconsistent processing of the multiple sister tools. The method is to add compensation value to eliminate the difference caused by machine tool and fixture.

Description

Method for automatically eliminating zero-point deviation of multiple sister tools
Technical Field
The invention belongs to the technical field of blade manufacturing, and particularly relates to a method for automatically eliminating zero deviation of multiple sister tools.
Background
In the manufacturing industry field, the blade clamp with high positioning accuracy is difficult to manufacture and has high manufacturing cost. Because the dimensional tolerance of the profile of the blade is strict, in order to ensure that the deformation of the blade body of the blade is in a controllable range, clamping is usually adopted by adopting a clamping tenon working face and blade tip propping mode. Because the tenon working face area is small, the positioning error of the tenon is transmitted to the blade tip in a manner of amplifying a plurality of times, and therefore the positioning accuracy of the tool seriously affects the processing quality of products. The FMS is an advanced manufacturing and processing technology, and relates to continuous use of a plurality of sister tools and a plurality of numerical control machine tools, and the zero position deviation of the plurality of sister tools has large dispersity, so that processed products are unqualified.
Disclosure of Invention
The invention aims to provide a method for automatically eliminating zero deviation of a plurality of sister tools, which solves the problem of inconsistency in processing of the plurality of sister tools.
The invention is realized by the following technical scheme:
a method for automatically eliminating the zero-point deviation of a plurality of sister tools comprises the following steps:
step 1: loading standard measuring tool on fixture fix 1 In preparation of the on-machine measurement program NC 1 、NC 2 、NC 3 、 NC 4 Parts machining program NC 5 The method comprises the steps of carrying out a first treatment on the surface of the The side surface of the standard measuring tool is named as a first surface, the front surface of the standard measuring tool is named as a second surface, the top surface of the standard measuring tool is named as a third surface, and a round hole is formed in the third surface;
step 2: using control software to automatically fix the clamp 1 Feeding the workpiece into a 1 st numerical control machine tool in an FMS;
step 3: automatic execution NC of 1 st numerical control machine tool 1 The machining coordinate zero point is WCS 0 Two points, designated as P, are measured on a first face of the standard gauge 1 、P 2 ；
NC 1 Automatic calculation of P 1 、P 2 The difference between the theoretical position and the actual position of (2), the precompensation value is recorded as theta 1 ；
Step 4: automatic execution NC of 1 st numerical control machine tool 2 The machining coordinate zero point is WCS 0 Two points are measured on the second surface, respectively point P 3 Sum point P 4 ；NC 2 Automatic calculation of P 3 、P 4 The difference between the theoretical position and the actual position of (c) is recorded as beta 1 ；
Step 5: automatic execution NC of 1 st numerical control machine tool 3 The machining coordinate zero point is WCS 0 3 points are measured in the round hole, namely point P 5 Point P 6 Sum point P 7 The method comprises the steps of carrying out a first treatment on the surface of the Based on point P 5 Point P 6 Point P 7 Measurement value, NC 3 Automatic calculation point P 5 Point P 6 Point P 7 The difference between the theoretical position and the actual position of (a) is recorded as a 1 、b 1 ；
Step 6: automatic execution NC of 1 st numerical control machine tool 4 The machining coordinate zero point is WCS 0 1 point is measured on the third surface as point P 8 The method comprises the steps of carrying out a first treatment on the surface of the Based on point P 8 Measuring the numerical value, and automatically calculating point P by the 1 st numerical control machine tool 8 The difference between the theoretical position and the actual position of (c) is recorded as c 1 ；
Step 7: obtaining a precompensation value a of an i-th numerical control machine tool in the precompensation FMS by adopting the same method as the steps 2 to 6 i 、b i 、c i 、θ i 、β i ；
Step 8: calculating the zero point difference delta a of the ith numerical control machine by taking the 1 st numerical control machine in the FMS as a reference i 、Δb i 、Δc i 、Δθ i 、Δβ i ；
Step 9: the same method as the steps 2 to 6 is adopted, and the ith fixture fix is obtained by the 1 st numerical control machine tool in the FMS i Is a precompensation value Fa of (2) i 、Fb i 、Fc i 、Fθ i 、Fβ i ；
With the 1 st clamp fix 1 Calculate the ith fixture fix as a benchmark i Zero point difference ΔFa of (2) i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i ；
Step 10: is fixture fix 1 Establishing a zero offset file 1 ，file 1 The method comprises two parts, wherein the first part is used for establishing a zero difference value database of the 1 st to i th numerical control machine tools, and the second part is used for pre-compensating the clamp; similarly, other sister clamp fix is established i Zero offset file of (a) i ；
Step 11: clamping the blade in a clamp, using a management and control system to carry out production scheduling, and when the processed blade is sent to a machine tool, using the management and control system of the FMS to carry out file i And NC (numerical control) 5 Send to the machine i And starting to process the part.
Further, in step 3-6, the machining coordinate system WCS 0 And on-machine measurement program NC 1 、NC 2 、 NC 3 、NC 4 The programming zeros are consistent.
Further, in step 3, the precompensation value θ 1 The method comprises the following steps:
‘
ε 1 ＝X 1 -X 1 ；
‘
ε 2 ＝X 2 -X 2 ；
wherein X is 1 、Y 1 、Z 1 For point P 1 Is a spatial coordinate value of (a); x is X 2 、Y 2 、Z 2 For point P 2 Is a spatial coordinate value of (a); l (L) 1 For point P 1 Sum point P 2 Is a distance of (2); x'. 1 For point P 1 Actual X-axis coordinate values; x'. 2 For point P 2 Actual X-axis coordinate values; epsilon 1 For point P 1 Deviation value in X direction; epsilon 2 For point P 2 Deviation value in X direction.
Further, in step 4, the precompensation value β 1 The method comprises the following steps:
‘
ε 3 ＝Y 3 -Y 3 ；
‘
ε 4 ＝Y 4 -Y 4 ；
wherein: x is X 3 、Y 3 、Z 3 For point P 3 Is a spatial coordinate value of (a); x is X 4 、Y 4 、Z 4 For point P 4 Is a spatial coordinate value of (a); l (L) 2 Is taken as a pointP 3 Sum point P 4 Is a distance of (2); y is Y 3 ' is point P 3 Actual Y-axis coordinate values; y is Y 4 ' is point P 4 Actual Y-axis coordinate values; epsilon 3 For point P 3 Deviation value in Y direction; epsilon 4 For point P 4 Deviation value in Y direction.
Further, in step 5, the precompensation value a 1 、b 1 The calculation formula of (2) is as follows:
(X’ 5 -O 1 ) 2 +(Y’ 5 -O 2 ) 2 +(Z’ 5 -O 3 ) 2 ＝R 2 ；
(X’ 6 -O 1 ) 2 +(Y’ 6 -O 2 ) 2 +(Z’ 6 -O 3 ) 2 ＝R 2 ；
(X’ 7 -O 1 ) 2 +(Y’ 7 -O 2 ) 2 +(Z’ 7 -O 3 ) 2 ＝R 2 ；
a 1 ＝O 1 ；
b 1 ＝O 2 ；
wherein: x'. 5 、Y’ 5 、Z’ 5 For point P 5 Actually measuring the space coordinate value; x'. 6 、Y’ 6 、Z’ 6 For point P 6 Actually measuring the space coordinate value; x'. 7 、Y’ 7 、Z’ 7 For point P 7 Actually measuring the space coordinate value; o (O) 1 、O 2 、O 3 Coordinate values in the direction X, Y, Z of the center of the round hole; r is the radius value of the round hole.
Further, in step 6, the precompensation value c 1 The method comprises the following steps:
c 1 ＝Z′ 8 ；
wherein: z's' 8 For point P 8 The spatial coordinate Z-axis values are actually measured.
Further, in step 8, Δa i 、Δb i 、Δc i 、Δθ i 、Δβ i The following relationship is satisfied：
Δa i ＝a i -a 1 ；
Δb i ＝b i -b 1 ；
Δc i ＝c i -c 1 ；
Δθ i ＝θ i -θ 1 ；
Δβ i ＝β i -β 1 ；
Wherein: a, a 1 、b 1 、c 1 、θ 1 、β 1 Is the 1 st numerical control machine fix 1 A compensation value; a, a i 、b i 、c i 、θ i 、β i The method comprises the steps of pre-compensating a value for an ith numerical control machine tool; Δa i 、Δb i 、Δc i 、Δθ i 、Δβ i The zero point deviation of the ith numerical control machine tool is i which is a positive integer greater than 1.
Further, in step 9, the following relationship is satisfied:
Fa 1 ＝a 1 ；
Fb 1 ＝b 1 ；
Fc 1 ＝c 1 ；
Fθ 1 ＝θ 1 ；
Fβ 1 ＝β 1 ；
wherein: fa (Fa) 1 、Fb 1 、Fc 1 、Fθ 1 、Fβ 1 Is the 1 st numerical control machine fix 1 And (5) compensating values.
Further, ΔFa i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i The following relationship is satisfied:
ΔFa i ＝Fa i -a 1 ；
ΔFb i ＝Fb i -b 1 ；
ΔFc i ＝Fc i -c 1 ；
ΔFθ i ＝Fθ i -θ 1 ；
ΔFβ i ＝Fβ i -β 1 ；
wherein: fa (Fa) 1 、Fb 1 、Fc 1 、Fθ 1 、Fβ 1 Pre-compensating the ith clamp; ΔFa i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i For the i-th clamp zero-point deviation, i is a positive integer greater than 1.
Further, in step 11, the ith numerically controlled machine tool machine i First automatically running offset file 1 And judging which machine tool the clamp is positioned on through the numerical control system, carrying out machine tool machining zero adjustment through the zero difference value, and finally running the clamp precompensation value.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a method for automatically eliminating zero-point deviation of multiple sister tools, which is based on an on-machine measurement technology, clamps a standard measuring tool into the tool according to the structure of a processed blade, establishes a set of algorithm, plans a detection path, automatically calculates deviation values of the standard measuring tool in each reference direction, adopts logic operation, combines the grammar of an operating system frame of a numerical control machine tool to automatically compensate the deviation values, and realizes automatic correction of a processing program, thereby solving the problem of inconsistent processing of the multiple sister tools. The FMS is provided with a plurality of machine tools and a plurality of tools, so that parts can be out of tolerance in the use process.
Drawings
FIG. 1 is a schematic diagram of a standard gauge according to the present invention;
1 is a first surface, 2 is a second surface, 3 is a third surface, and 4 is a round hole.
Detailed Description
The objects, technical solutions and advantages of the present invention will be more apparent from the following detailed description with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention.
The components illustrated in the figures and described and shown in the embodiments of the invention may be arranged and designed in a wide variety of different configurations, and thus the detailed description of the embodiments of the invention provided in the figures below is not intended to limit the scope of the invention as claimed, but is merely representative of selected ones of the embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention, based on the figures and embodiments of the present invention.
The invention discloses a method for automatically eliminating zero-point deviation of a plurality of sister tools, which comprises the following steps:
step 1: to prepare the fixture fix to be processed 1 Standard measuring tool, the standard measuring tool is mounted on the fixture fix 1 In preparation for programming an on-machine measurement program NC 1 、NC 2 、NC 3 Preparing to program NC for machining parts 4 。
As shown in fig. 1, the side surface of the standard gauge is named as a first surface, the front surface is named as a second surface, the top surface is named as a third surface, and a round hole is formed in the third surface.
Step 2: using control software to automatically fix the clamp 1 Feeding into the 1 st numerical control machine tool machine in FMS 1 Is a kind of medium.
Step 3: machine 1 Automatically executing NC 1 The machining coordinate zero point is WCS 0 Two points, P respectively, are measured on the face 1 of the standard gauge 1 、P 2 ；
machine 1 Automatic calculation of P 1 、P 2 The difference between the theoretical position and the actual position of the X-axis direction torsion is compensated, and the precompensation value is theta 1 。
ε 1 ＝X‘ 1 -X 1 ；
ε 2 ＝X‘ 2 -X 2 ；
Wherein X is 1 、Y 1 、Z 1 Is the point P on the surface 1 1 Is a spatial coordinate value of (a); x is X 2 、Y 2 、Z 2 Is the point P on the surface 1 2 Is a spatial coordinate value of (a); l (L) 1 Is the point P on the surface 1 1 Sum point P 2 Is a distance of (2); x'. 1 Is P 1 The actual X-axis coordinate value of the point; x'. 2 Is P 2 The actual X-axis coordinate value of the point; epsilon 1 Is P 1 A deviation value in the X direction of the point; epsilon 2 Is P 2 Offset value in the X direction of the point.
Step 4: machine 1 Automatically executing NC 2 The machining coordinate zero point is WCS 0 Two points are measured at the face 2, respectively point P 3 Sum point P 4 ；
machine 1 Automatic calculation of P 3 、P 4 The difference between the theoretical position and the actual position of the Y-axis direction torsion is compensated, and the precompensation value is beta 1 。
ε 3 ＝Y‘ 3 -Y 3 ；
ε 4 ＝Y‘ 4 -Y 4 ；
Wherein: x is X 3 、Y 3 、Z 3 For point P on face 2 3 Is a spatial coordinate value of (a); x is X 4 、Y 4 、Z 4 For point P on face 2 4 Is a spatial coordinate value of (a); l (L) 2 For point P on face 2 3 Sum point P 4 Is a distance of (2); y'. 3 Is P 3 The actual Y-axis coordinate value of the point; y'. 4 Is P 4 Point actual Y-axisCoordinate values; epsilon 3 Is P 3 Deviation value of the point Y direction; epsilon 4 Is P 4 Deviation value in the Y direction of the point.
Step 5: machine 1 Automatically executing NC 3 The machining coordinate zero point is WCS 0 3 points are measured in the round hole, namely point P 5 Point P 6 Point P 7 ；
Based on point P 5 Point P 6 Point P 7 Measurement value, machine 1 Automatic calculation point P 5 Point P 6 Point P 7 The difference between the theoretical position and the actual position of (a) is a precompensation value of a 1 、b 1 、c 1 。
The compensation value a 1 、b 1 、c 1 The following relationship is satisfied:
(X’ 5 -O 1 ) 2 +(Y’ 5 -O 2 ) 2 +(Z’ 5 -O 3 ) 2 ＝R 2
(X’ 6 -O 1 ) 2 +(Y’ 6 -O 2 ) 2 +(Z’ 6 -O 3 ) 2 ＝R 2
(X’ 7 -O 1 ) 2 +(Y’ 7 -O 2 ) 2 +(Z’ 7 -O 3 ) 2 ＝R 2
a 1 ＝O 1
b 1 ＝O 2
wherein: x'. 5～7 、Y’ 5～7 、Z’ 5～7 For point P 5 、P 6 、P 7 Actually measuring the space coordinate value; o (O) 1～3 A coordinate value in the direction X, Y, Z of the center of the circular hole; r is the radius value of the round hole.
Step 6: machine 1 Automatically executing NC 4 The machining coordinate zero point is WCS 0 1 point is measured on the surface 3 as point P 8 ；
Based on point P 8 Measurement value, machine 1 Automatic calculation point P 8 The difference between the theoretical position and the actual position is compensated after processing, and the precompensation value is c 1 。
c 1 ＝Z‘ 8
Wherein: z's' 8 For point P 8 The spatial coordinate Z-axis values are actually measured.
Step 7: the same method as the steps 3 to 6 is adopted to obtain the machine tool of the ith machine numerical control machine in the precompensation FMS i Precompensation value a i 、b i 、c i 、θ i 、β i 。
Step 8: with a machine in FMS 1 Based on the reference, calculate a machine i Zero point difference value deltaa i 、Δb i 、Δc i 、Δθ i 、Δβ i 。
Wherein: Δa i 、Δb i 、Δc i 、Δθ i 、Δβ i The following relationship is satisfied:
Δa i ＝a i -a 1 ；
Δb i ＝b i -b 1 ；
Δc i ＝c i -c 1 ；
Δθ i ＝θ i -θ 1 ；
Δβ i ＝β i -β 1 ；
wherein: a, a 1 、b 1 、c 1 、θ 1 、β 1 Is the 1 st numerical control machine fix 1 A compensation value; a, a i 、b i 、c i 、θ i 、β i Tool fix for ith numerical control machine tool 1 A measurement value; Δa i 、Δb i 、Δc i 、Δθ i 、Δβ i Tool fix for ith numerical control machine tool 1 And (5) compensating values.
Wherein: machine 1 Zero point difference value deltaa i 、Δb i 、Δc i 、Δθ i 、Δβ i Are all 0.
Step 9: the same method as the steps 2 to 6 is adopted in the FMS1 numerical control machine tool obtains the ith fixture fix i Is a precompensation value Fa of (2) i 、Fb i 、Fc i 、Fθ i 、Fβ i ；
With the 1 st clamp fix 1 Calculate the ith fixture fix as a benchmark i Zero point difference ΔFa of (2) i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i ；
Fa 1 ＝a 1 ；
Fb 1 ＝b 1 ；
Fc 1 ＝c 1 ；
Fθ 1 ＝θ 1 ；
Fβ 1 ＝β 1 ；
Wherein: fa (Fa) 1 、Fb 1 、Fc 1 、Fθ 1 、Fβ 1 Is the 1 st numerical control machine fix 1 And (5) compensating values.
ΔFa i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i The following relationship is satisfied:
ΔFa i ＝Fa i -a 1 ；
ΔFb i ＝Fb i -b 1 ；
ΔFc i ＝Fc i -c 1 ；
ΔFθ i ＝Fθ i -θ 1 ；
ΔFβ i ＝Fβ i -β 1 ；
wherein: fa (Fa) 1 、Fb 1 、Fc 1 、Fθ 1 、Fβ 1 Pre-compensating the ith clamp; ΔFa i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i For the i-th clamp zero-point deviation, i is a positive integer greater than 1.
Step 10: is fix 1 Establishing a zero offset file 1 ，file 1 The method comprises two parts, wherein the first part is used for establishing a zero point difference value database of the 1 st to i th numerical control machine tools, and the second part is used for pre-clamping the fixtureAnd (5) compensating values.
Similarly, other sister clamps fix can be established according to the steps 1-13 i Zero offset file of (a) i 。
Step 11: clamping the blade in a clamp, using a management and control system to carry out production scheduling, and when the processed blade is sent to a machine tool, using the management and control system of the FMS to carry out file 1 And NC (numerical control) 5 Send to the machine i And starting to process the part.
Ith numerically-controlled machine tool machine i First automatically running offset file 1 And firstly judging which machine tool the clamp is positioned on through the numerical control system, carrying out machine tool machining zero adjustment through the zero point difference value, and finally running a precompensation value corresponding to the clamp.
The compensation mode is rotation and offset frame structure variable.
In a certain FMS line, 10 tools and 3 numerical control machine tools are all arranged, zero compensation values of the machine tools and the fixtures are collected by adopting the method, and the data are as follows:
TABLE 1
Sequence number Δa i Δb i Δc i Δθ i Δβ i
Machine tool 1 0 0 0 0 0
Machine tool 2 0.04 0 0 0.01 0
Machine tool 3 -0.02 -0.22 0 0.01 0
TABLE 2
The qualification rate of parts before improvement is about 30%, and after the method for automatically eliminating the zero-point deviation of a plurality of sister tools designed by the invention is used, the qualification rate of the parts is improved to more than 95%.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims (6)

1. The method for automatically eliminating the zero-point deviation of the sister tools is characterized by comprising the following steps:
step 1: loading standard measuring tool on fixture fix 1 In preparation of the on-machine measurement program NC 1 、NC 2 、NC 3 、NC 4 Parts machining program NC 5 The method comprises the steps of carrying out a first treatment on the surface of the The side surface of the standard measuring tool is named as a first surface, the front surface of the standard measuring tool is named as a second surface, the top surface of the standard measuring tool is named as a third surface, and a round hole is formed in the third surface;
step 2: using control software to automatically fix the clamp 1 Feeding the workpiece into a 1 st numerical control machine tool in an FMS;
step 3: automatic execution NC of 1 st numerical control machine tool 1 The machining coordinate zero point is WCS 0 Two points, designated as P, are measured on a first face of the standard gauge 1 、P 2 ；
NC 1 Automatic calculation of P 1 、P 2 The difference between the theoretical position and the actual position of (2), the precompensation value is recorded as theta 1 ；
In step 3, the precompensation value θ 1 The method comprises the following steps:
ε 1 ＝X‘ 1 -X 1 ；
ε 2 ＝X‘ 2 -X 2 ；
wherein X is 1 、Y 1 、Z 1 For point P 1 Is a spatial coordinate value of (a); x is X 2 、Y 2 、Z 2 For point P 2 Is a spatial coordinate value of (a); l (L) 1 For point P 1 Sum point P 2 Is a distance of (2); x'. 1 For point P 1 Actual X-axis coordinate values; x'. 2 For point P 2 Actual X-axis coordinate values; epsilon 1 For point P 1 Deviation value in X direction; epsilon 2 For point P 2 Deviation value in X direction;
step 4: automatic execution NC of 1 st numerical control machine tool 2 The machining coordinate zero point is WCS 0 Two points are measured on the second surface, respectively point P 3 Sum point P 4 ；NC 2 Automatic calculation of P 3 、P 4 The difference between the theoretical position and the actual position of (c) is recorded as beta 1 ；
In step 4, the precompensation value β 1 The method comprises the following steps:
ε 3 ＝Y‘ 3 -Y 3 ；
ε 4 ＝Y‘ 4 -Y 4 ；
wherein: x is X 3 、Y 3 、Z 3 For point P 3 Is a spatial coordinate value of (a); x is X 4 、Y 4 、Z 4 For point P 4 Is a spatial coordinate value of (a); l (L) 2 For point P 3 Sum point P 4 Is a distance of (2); y'. 3 For point P 3 Actual Y-axis coordinate values; y'. 4 For point P 4 Actual Y-axis coordinate values; epsilon 3 For point P 3 Deviation value in Y direction; epsilon 4 For point P 4 Deviation value in Y direction;
step 5: automatic execution NC of 1 st numerical control machine tool 3 The machining coordinate zero point is WCS 0 3 points are measured in the round hole, namely point P 5 Point P 6 Sum point P 7 The method comprises the steps of carrying out a first treatment on the surface of the Base groupAt point P 5 Point P 6 Point P 7 Measurement value, NC 3 Automatic calculation point P 5 Point P 6 Point P 7 The difference between the theoretical position and the actual position of (a) is recorded as a 1 、b 1 ；
In step 5, the precompensation value a 1 、b 1 The calculation formula of (2) is as follows:
(X’ 5 -O 1 ) 2 +(Y’ 5 -O 2 ) 2 +(Z’ 5 -O 3 ) 2 ＝R 2 ；
(X’ 6 -O 1 ) 2 +(Y’ 6 -O 2 ) 2 +(Z’ 6 -O 3 ) 2 ＝R 2 ；
(X’ 7 -O 1 ) 2 +(Y’ 7 -O 2 ) 2 +(Z’ 7 -O 3 ) 2 ＝R 2 ；
a 1 ＝O 1 ；
b 1 ＝O 2 ；
wherein: x'. 5 、Y’ 5 、Z’ 5 For point P 5 Actually measuring the space coordinate value; x'. 6 、Y’ 6 、Z’ 6 For point P 6 Actually measuring the space coordinate value; x'. 7 、Y’ 7 、Z’ 7 For point P 7 Actually measuring the space coordinate value; o (O) 1 、O 2 、O 3 Coordinate values in the direction X, Y, Z of the center of the round hole; r is the radius value of the round hole;
step 6: automatic execution NC of 1 st numerical control machine tool 4 The machining coordinate zero point is WCS 0 1 point is measured on the third surface as point P 8 The method comprises the steps of carrying out a first treatment on the surface of the Based on point P 8 Measuring the numerical value, and automatically calculating point P by the 1 st numerical control machine tool 8 The difference between the theoretical position and the actual position of (c) is recorded as c 1 ；
In step 6, the precompensation value c 1 The method comprises the following steps:
c 1 ＝Z′ 8 ；
wherein: z's' 8 For point P 8 Actually measuring the Z-axis value of the space coordinate;
step 7: obtaining a precompensation value a of an i-th numerical control machine tool in the precompensation FMS by adopting the same method as the steps 2 to 6 i 、b i 、c i 、θ i 、β i ；
Step 8: calculating the zero point difference delta a of the ith numerical control machine by taking the 1 st numerical control machine in the FMS as a reference i 、Δb i 、Δc i 、Δθ i 、Δβ i ；
Step 9: the same method as the steps 2 to 6 is adopted, and the ith fixture fix is obtained by the 1 st numerical control machine tool in the FMS i Is a precompensation value Fa of (2) i 、Fb i 、Fc i 、Fθ i 、Fβ i ；
With the 1 st clamp fix 1 Calculate the ith fixture fix as a benchmark i Zero point difference ΔFa of (2) i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i ；
Step 10: is fixture fix 1 Establishing a zero offset file 1 ，file 1 The method comprises two parts, wherein the first part is used for establishing a zero difference value database of the 1 st to i th numerical control machine tools, and the second part is used for pre-compensating the clamp; similarly, other sister clamp fix is established i Zero offset file of (a) i ；
Step 11: clamping the blade in a clamp, using a management and control system to carry out production scheduling, and when the processed blade is sent to a machine tool, using the management and control system of the FMS to carry out file i And NC (numerical control) 5 Send to the machine i And starting to process the part.
2. The method for automatically eliminating the zero deviation of a plurality of sister tools according to claim 1, wherein in the steps 3-6, the coordinate zero WCS is processed 0 And on-machine measurement program NC 1 、NC 2 、NC 3 、NC 4 The programming zeros are consistent.
3. According to claimThe method for automatically eliminating zero-point deviation of sister tools as set forth in claim 1, wherein in step 8, Δa is as follows i 、Δb i 、Δc i 、Δθ i 、Δβ i The following relationship is satisfied:
Δa i ＝a i -a 1 ；
Δb i ＝b i -b 1 ；
Δc i ＝c i -c 1 ；
Δθ i ＝θ i -θ 1 ；
Δβ i ＝β i -β 1 ；
wherein: a, a 1 、b 1 、c 1 、θ 1 、β 1 Is the 1 st numerical control machine fix 1 A compensation value; a, a i 、b i 、c i 、θ i 、β i The method comprises the steps of pre-compensating a value for an ith numerical control machine tool; Δa i 、Δb i 、Δc i 、Δθ i 、Δβ i The zero point deviation of the ith numerical control machine tool is i which is a positive integer greater than 1.
4. The method for automatically eliminating zero-point deviation of sister tools according to claim 1, wherein in step 9, the following relationship is satisfied:
Fa 1 ＝a 1 ；
Fb 1 ＝b 1 ；
Fc 1 ＝c 1 ；
Fθ 1 ＝θ 1 ；
Fβ 1 ＝β 1 ；
wherein: fa (Fa) 1 、Fb 1 、Fc 1 、Fθ 1 、Fβ 1 Is the 1 st numerical control machine fix 1 And (5) compensating values.
5. The method for automatically eliminating zero offset of sister tools as defined in claim 4, wherein ΔFa i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i The following relationship is satisfied:
ΔFa i ＝Fa i -a 1 ；
ΔFb i ＝Fb i -b 1 ；
ΔFc i ＝Fc i -c 1 ；
ΔFθ i ＝Fθ i -θ 1 ；
ΔFβ i ＝Fβ i -β 1 ；
wherein: fa (Fa) 1 、Fb 1 、Fc 1 、Fθ 1 、Fβ 1 Pre-compensating the ith clamp; ΔFa i 、ΔFb i 、ΔFc i 、ΔFθ i 、ΔFβ i For the i-th clamp zero-point deviation, i is a positive integer greater than 1.
6. The method for automatically eliminating zero-point deviation of sister tools according to claim 1, wherein in step 11, the ith numerical control machine tool machine i First automatically running offset file 1 And judging which machine tool the clamp is positioned on through the numerical control system, carrying out machine tool machining zero adjustment through the zero difference value, and finally running the clamp precompensation value.
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