CN113814795B - Workpiece processing data measuring, correcting and checking method and system based on dual-channel on-machine measurement - Google Patents
Workpiece processing data measuring, correcting and checking method and system based on dual-channel on-machine measurement Download PDFInfo
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Abstract
The invention discloses a workpiece processing data measuring, correcting and checking method and system based on double-channel on-machine measurement, and belongs to the technical field of numerical control processing and intelligent detection. The method comprises the steps of acquiring original processing data of a workpiece in an on-machine measurement mode; integrating and sharing the original processing data; judging, correcting and compensating the integrated and shared original processing data according to the prestored model data; and checking the machining allowance and the total eccentricity of the corrected and compensated data, and updating the data qualified in the checking to a machining program of the machine tool. The invention provides a workpiece processing data measuring, correcting and checking method and system based on double-channel on-machine measurement, which realize automatic measurement of workpieces and automatic correction and checking of measured data, reduce the amount of manual participation, improve the working efficiency and realize the traceability of workpiece processing data.
Description
Technical Field
The invention relates to a workpiece processing data measuring, correcting and checking method and system based on double-channel on-machine measurement, and belongs to the technical field of numerical control processing and intelligent detection.
Background
The large box type workpiece has large deformation after welding, large dimensional tolerance and form and position tolerance deviation of each processing part, uneven cutting allowance, unfixed processing coordinates of different workpieces during processing and production, the workpiece cannot be directly cut after being clamped, a certain auxiliary means is required to confirm the processing coordinates, the processing allowance, the eccentricity and the relative position size of each processing part of the workpiece before processing, the traditional trial cutting, scribing and manual measurement modes have low efficiency, the processing precision is greatly influenced by human, and the product quality cannot be ensured when large-batch processing is carried out.
With the continuous improvement of the measurement technology and the intelligent manufacturing technology, the on-machine measurement technology is continuously applied, however, in the field of large-scale box type workpiece processing, the on-machine measurement system mostly focuses on the measurement of the workpiece processing coordinate, the workpiece processing size correction still adopts manual operation, the workpiece processing allowance and the eccentricity deviation condition still need to be confirmed manually, automatic and continuous processing still cannot be achieved, meanwhile, after the previous workpiece is processed, the processing data of the previous workpiece is immediately covered by the processing data of the next workpiece, and the processing data cannot be stored, so that the quality problem after the workpiece is processed cannot be traced back.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a workpiece processing data measuring, correcting and checking method and system based on double-channel on-machine measurement, so that the manual participation amount is reduced, the working efficiency is improved, and the traceability of the workpiece processing data is realized.
In order to realize the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a workpiece processing data measuring, correcting and verifying method and system based on dual-channel on-machine measurement, which is characterized by comprising the following steps:
acquiring original processing data of a workpiece in an on-machine measurement mode;
integrating and sharing the original processing data;
judging, correcting and compensating the integrated and shared original processing data according to the prestored model data;
and checking the machining allowance and the total eccentricity of the corrected and compensated data, and updating the data qualified in the checking to a machining program of the machine tool.
Further, the original processing data are respectively stored in the macro variables of the two channels.
Furthermore, the processes of judging, correcting and compensating the integrated and shared original processing data and verifying the processing allowance and the eccentricity of the data after correction and compensation are performed in one of the two channels by adopting a synchronous instruction waiting mode.
Further, the on-line measurement mode comprises the following steps:
calculating the predicted distance of the rapid movement of the measuring head according to the preset processing hole;
guiding a measuring head to reach the predicted position through a measuring program and point-contacting the inner surface of the measuring workpiece;
and after the point contact is finished, the measuring head is guided to return and continuously measure for two times along different directions, so that the position of the hole center of the workpiece is determined.
Further, the method for judging, correcting and compensating the integrated and shared original processing data includes:
adopting an identification data judgment method to carry out identification storage on the original processing data;
calculating the relative position size between the processing holes by adopting a point distance method according to the marked original processing data, and carrying out-of-tolerance judgment to obtain out-of-tolerance size;
and correcting and compensating the two groups of related machining holes in a circulating calculation mode according to the out-of-tolerance size.
Further, the dot pitch method includes:
calculating the inclination angle of the connecting line of each processing hole and the datum point relative to the datum line according to the trigonometric function;
and projecting each processing hole onto the reference line according to the offset of the inclination angle, thereby calculating the relative distance between each processing hole and the reference line and the relative distance between the foot point of each processing hole on the reference line and the reference point.
Furthermore, before correction compensation is carried out by adopting a loop calculation mode, flag bit data for preventing infinite loop is preset, and when infinite loop occurs in the loop calculation process, a quality abnormity alarm can be sent out.
Further, the method for verifying the machining allowance and the eccentricity of the corrected and compensated data and updating the data qualified by verification to the machining program of the machine tool comprises the following steps:
calculating a correction compensation machining allowance according to the data after correction compensation;
when the correction compensation machining allowance is insufficient, the system automatically gives an alarm and machining is not allowed;
calculating the correction compensation eccentricity in the X direction and the Y direction according to the data after correction compensation;
calculating the total correction compensation eccentricity through a trigonometric function;
when the correction compensation total eccentricity is out of tolerance, the system automatically gives an alarm and does not allow processing;
performing secondary correction compensation on the processing holes with insufficient correction compensation machining allowance or excessive correction compensation total eccentric amount, wherein the secondary correction compensation preferentially performs data correction on the holes with excessive correction compensation total eccentric amount;
and automatically updating the data qualified for correcting and compensating the machining allowance and the total eccentricity of the machine tool into a coordinate system of the machine tool in a macro program transmission mode.
Further, the method includes storing the raw process data and the qualified data in a remote server via a remote data transmission system.
In a second aspect, the present invention provides a workpiece processing data verification system, the system comprising:
on-machine measurement module: the method comprises the steps of acquiring original processing data of a workpiece;
the double-channel data integration module comprises: the processing data are integrated and shared through a dual-channel data integration module;
and a correction compensation module: the system is used for judging, correcting and compensating integrated and shared processing data according to prestored model data;
a checking module: the data processing device is used for verifying the machining allowance and the eccentricity of the data after correction and compensation, and automatically updating the data qualified by verification into a machining program of a machine tool;
the remote data transmission module: the remote data transmission system is used for storing the processing data and the data qualified by verification in the remote server.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the original processing data of the workpiece is acquired in an on-machine measurement mode, the integrated and shared original processing data is judged, corrected and compensated according to the pre-stored model data, finally, the processing allowance and the eccentricity of the corrected and compensated data are checked, the data qualified in the check is updated to the processing program of the machine tool, and when the processed workpiece has a problem, the processing data of the workpiece can be traced. The system realizes the continuous processing of the double-channel machine tool on the large structural part through the on-machine measuring module, the double-channel data integration module, the correction compensation module, the calibration module and the remote data transmission system, effectively reduces the manual participation amount and improves the overall working efficiency;
the measuring head is guided by the measuring program to quickly reach the predicted position and then slowly touch the inner surface of the measuring workpiece, the double-channel measuring efficiency is improved and the measuring precision is improved by a high-speed approach to the surface of the workpiece and a low-speed accurate measuring mode, and multiple times of measurement are not needed.
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FIG. 1 is a flow chart of a method and system for measuring, correcting and verifying workpiece processing data based on dual channel on-machine measurement according to the present invention;
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
the embodiment of the invention provides a workpiece processing data measuring, correcting and verifying method and system based on double-channel on-machine measurement, as shown in figure 1, the method specifically comprises the following steps:
(1) The original processing data of the workpiece are obtained in an on-machine measurement mode, the on-machine measurement is dual-channel measurement, and the original processing data obtained by the dual-channel measurement are respectively stored in the macro variables of the dual channels.
(2) And integrating and sharing the original processing data.
(3) Judging, correcting and compensating the integrated and shared original processing data according to the prestored model data;
(4) And checking the machining allowance and the total eccentricity of the corrected and compensated data, and updating the data qualified by checking into the machining program of the machine tool.
The on-machine measurement is a dual-channel measurement, and measured raw machining data are respectively stored in dual-channel macro variables and are integrated and shared. And judging and correcting and compensating the integrated and shared original processing data, and checking the processing allowance and the eccentricity of the corrected and compensated data in one of the two channels in a synchronous instruction waiting mode.
According to the invention, the original processing data of the workpiece is acquired in an on-machine measurement mode, the original processing data is integrated and shared, the integrated and shared original processing data is judged, corrected and compensated according to the pre-stored model data, finally, the processing allowance and the eccentricity of the corrected and compensated data are checked, and the data qualified by the check is updated to the processing program of the machine tool, so that the continuous processing of a double-channel machine tool on a large structural member is realized, the manual participation is effectively reduced, the integral working efficiency is improved, and when the processed workpiece has a problem, the processing data of the workpiece can be traced.
In a specific embodiment of the present invention, the dual channel measurement method includes the following steps:
and calculating the predicted distance of the measuring head to move quickly according to the preset machining hole, wherein the diameter of the hole is D, the unit is mm, the measuring head is positioned at the edge position of the hole D/2, and the predicted distance of the measuring head to move quickly is D/2-15mm.
The measuring head is guided by the measuring program to quickly reach the predicted position and then slowly point-touches the inner surface of the measuring workpiece, the double-channel measuring efficiency is improved and the measuring precision is improved by means of high-speed approach to the surface of the workpiece and low-speed accurate measurement, and multiple times of measurement are not needed;
after the point contacts the inner surface of the workpiece, the measuring head is guided to return and continue to measure twice along different directions, so that the position of the original hole center of each workpiece is determined, specifically, the expression for determining the position of the original hole center is as follows:
wherein, (X, Y) represents the original hole center position; (X1, Y1) represents a first measurement point; (X2, Y2) represents a second measurement point; (X3, Y3) represents a third measurement point.
In a specific embodiment of the present invention, the method for determining, correcting and compensating the integrated and shared original processing data according to the pre-stored model data includes the following steps:
the identification data judgment method is adopted to carry out identification storage on the original processing data, specifically, the identification data can be set to be 0 or 1, wherein the identification of the integrated and shared original processing data is 0, the storage is carried out, when the original processing data is corrected and compensated, the identification of the original processing data is 1, the original processing data is ensured not to be covered, and when a problem occurs in a processed workpiece, the original processing data of the workpiece can be traced.
Calculating the relative position size between the processing holes by adopting a point distance method according to the marked original processing data, and judging the out-of-tolerance to obtain the out-of-tolerance size, wherein the point distance method comprises the following steps: setting an original hole center positioned at the leftmost side of a workpiece as a reference point A (X1, Y1), setting an original hole center positioned at the rightmost side of the workpiece as a reference point B (X2, Y2), setting an original hole center needing to be calculated as an original processing point C (X0, Y0), setting a connecting line of the reference point A and the reference point B as a reference line, and setting a relative inclination angle between the connecting line of the original processing point C and the reference point A and the reference line AB as follows:
in the formula, γ represents a relative inclination angle between AC and AB.
The relative distance between the original processing point C and the datum line AB is as follows:
in the formula, D represents the relative distance between the original processing point C and the reference line AB. And calculating the distance between the foot point of the original processing point C on the datum line AB and the datum point A by adopting a trigonometric function according to the gamma and the D. And (3) making a vertical line along the vertical direction through the original processing point C, calculating the intersection point of the vertical line and the reference line AB, comparing the coordinates of the original processing point C and the intersection point, determining the correction compensation to be positive compensation or negative compensation, and realizing the out-of-tolerance judgment. And setting the distance between the foot point of the original processing point C on the datum line AB and the datum point A as E, comparing D and E with the set dimension of the drawing, and calculating the out-of-tolerance dimension.
And correcting and compensating the two groups of related machining holes in a cyclic increasing or decreasing mode according to the out-of-tolerance size obtained by the point distance method, wherein the method specifically comprises the following steps: and circularly increasing or decreasing by 0.1mm each time along the direction perpendicular to the datum line AB along the original processing point C according to the out-of-tolerance judgment and the out-of-tolerance size until the out-of-tolerance size is completely eliminated by the correction compensation amount, then recalculating whether the hole subjected to correction compensation affects the coordinate sizes of other associated holes, if so, performing correction compensation on other associated holes in a circularly increasing or decreasing mode, and if not, sequentially performing correction compensation according to the sequence marked by the drawing until all the holes meet the drawing requirements.
In order to prevent the situation of infinite loop, before correction compensation is carried out in a loop increasing or decreasing mode, flag bit data for preventing infinite loop is preset, and when infinite loop occurs in the loop calculation process, quality abnormity alarm can be sent out.
The method for verifying the machining allowance and the total eccentricity of the corrected and compensated data and updating the data qualified by verification into the machining program of the machine tool comprises the following steps of:
calculating the machining allowance of the correction compensation machining point C according to the coordinates of the correction compensation machining point C; setting the qualified standard of the machining allowance to be 3mm, and when the corrected compensation machining allowance does not meet the 3mm, automatically giving an alarm by a system, and not allowing machining;
calculating correction compensation eccentric amounts in the X direction and the Y direction according to the coordinates of the correction compensation machining point C, and calculating correction compensation total eccentric amount through a trigonometric function; setting the qualified standard of the total eccentric amount to be 2.5mm, and when the corrected and compensated total eccentric amount exceeds 2.5mm, automatically giving an alarm by the system, and not allowing processing;
if the correction compensation machining allowance and the correction compensation total eccentric amount are qualified, machining is allowed; if the correction compensation machining allowance is insufficient or the correction compensation total eccentric amount is out of tolerance, performing secondary correction compensation, and performing data correction on the hole with the correction compensation total eccentric amount out of tolerance preferentially by the secondary correction compensation;
and automatically updating the data qualified for correcting and compensating the machining allowance and the total eccentricity of the machine tool into a coordinate system of the machine tool in a macro program transmission mode.
In one embodiment, the original processing data stored in the identification and the data which are qualified for correcting and compensating the processing allowance and correcting and compensating the total eccentricity are stored in a remote server through a remote data transmission system.
The second embodiment:
the embodiment provides a workpiece processing data measuring, correcting and verifying system based on dual-channel on-machine measurement, which comprises:
on-machine measurement module: the method is used for acquiring original processing data of the workpiece;
the double-channel data integration module comprises: the processing data are integrated and shared through a dual-channel data integration module;
and a correction compensation module: the system is used for judging, correcting and compensating integrated and shared processing data according to prestored model data;
a checking module: the data processing device is used for verifying the machining allowance and the eccentricity of the data after correction and compensation, and automatically updating the data qualified by verification into a machining program of a machine tool;
the remote data transmission module: the remote data transmission system is used for storing the processing data and the data qualified by the verification in the remote server.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A workpiece processing data measuring, correcting and checking method based on dual-channel on-machine measurement is characterized by comprising the following steps:
acquiring original processing data of a workpiece in an on-machine measurement mode;
integrating and sharing the original processing data;
judging, correcting and compensating the integrated and shared original processing data according to the prestored model data;
checking the machining allowance and the total eccentricity of the corrected and compensated data, and updating the data qualified by checking into a machining program of the machine tool;
the method for verifying the machining allowance and the total eccentricity of the corrected and compensated data and updating the data qualified in the verification into the machining program of the machine tool comprises the following steps:
calculating the correction compensation machining allowance according to the data after correction compensation;
when the correction compensation machining allowance is insufficient, the system automatically gives an alarm and machining is not allowed;
calculating the correction compensation eccentricity in the X direction and the Y direction according to the data after correction compensation;
calculating the total correction compensation eccentricity through a trigonometric function;
when the correction compensation total eccentricity is out of tolerance, the system automatically gives an alarm and does not allow processing;
performing secondary correction compensation on the processing holes with insufficient correction compensation machining allowance or excessive correction compensation total eccentric amount, wherein the secondary correction compensation preferentially performs data correction on the holes with excessive correction compensation total eccentric amount;
and automatically updating the data qualified for correcting and compensating the machining allowance and the total eccentric amount to a machine tool coordinate system in a macro program transmission mode.
2. The method for measuring, correcting and checking the workpiece processing data based on the double-channel on-machine measurement as claimed in claim 1, wherein the on-machine measurement is a double-channel measurement, and the raw processing data are respectively stored in a double-channel macro variable.
3. The method for measuring, correcting and checking the workpiece processing data based on the dual-channel on-machine measurement as claimed in claim 2, wherein the processes of judging, correcting and compensating the integrated and shared original processing data and checking the processing allowance and the total eccentricity of the data after correction and compensation are carried out in a mode of synchronous waiting for instructions and are carried out in one of the dual-channel.
4. The method for measuring, correcting and verifying the workpiece processing data based on the double-channel on-machine measurement as claimed in claim 2, wherein the double-channel measurement mode comprises the following steps:
calculating the predicted distance of the measuring head for rapid movement according to the preset workpiece aperture;
guiding a measuring head to reach the predicted position through a measuring program and point-contacting the inner surface of the measuring workpiece;
and after the point contact is finished, the measuring head is guided to return and continuously measure twice along different directions, so that the position of the hole center is determined.
5. The dual channel on-machine measurement based workpiece processing data measuring, correcting and verifying method of claim 1, wherein the method for judging and correcting compensation comprises the following steps:
adopting an identification data judgment method to carry out identification storage on the original processing data;
calculating the relative position size between the processing holes by adopting a point distance method according to the marked original processing data, and carrying out-of-tolerance judgment to obtain out-of-tolerance size;
and correcting and compensating the two groups of related machining holes in a circulating calculation mode according to the out-of-tolerance size.
6. The dual channel on-machine measurement based workpiece processing data measuring, correcting and verifying method of claim 5, wherein the dot pitch method comprises:
calculating the inclination angle of the connecting line of each processing hole and the datum point relative to the datum line according to the trigonometric function;
and projecting each processing hole onto the reference line according to the offset of the inclination angle, thereby calculating the relative distance between each processing hole and the reference line and the relative distance between the vertical foot point of each processing hole on the reference line and the reference point.
7. The method for measuring, correcting and verifying the workpiece processing data based on the double-channel on-machine measurement as claimed in claim 5, wherein before the correction compensation is carried out in a cyclic calculation mode, flag bit data for preventing infinite circulation is preset, and when the infinite circulation occurs in the cyclic calculation process, a quality abnormity alarm can be sent out.
8. The dual channel on-machine measurement-based workpiece processing data measurement, modification, and verification method of claim 1, further comprising storing raw processing data and verification-qualified data in a remote server via a remote data transmission system.
9. A dual channel on-machine metrology based workpiece processing data measurement, correction, and verification system for implementing the method of claims 1-8, the system comprising:
on-machine measurement module: the device is used for acquiring the workpiece processing data;
the double-channel data integration module comprises: the processing data are integrated and shared through a dual-channel data integration module;
a correction compensation module: the system comprises a model data storage unit, a processing data acquisition unit, a processing data processing unit and a processing data processing unit, wherein the model data storage unit is used for storing model data;
a checking module: the data processing device is used for verifying the machining allowance and the total eccentric amount of the corrected and compensated data, and automatically updating the qualified data into a machining program of the machine tool;
remote data transmission system: the remote data transmission system is used for storing the processing data and the data qualified by verification in the remote server.
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