CN118348912A - Automatic control method for flatness of workbench of numerical control machine tool in flexible production line - Google Patents
Automatic control method for flatness of workbench of numerical control machine tool in flexible production line Download PDFInfo
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- CN118348912A CN118348912A CN202410298455.XA CN202410298455A CN118348912A CN 118348912 A CN118348912 A CN 118348912A CN 202410298455 A CN202410298455 A CN 202410298455A CN 118348912 A CN118348912 A CN 118348912A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Program-control systems
- G05B19/02—Program-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35349—Display part, programmed locus and tool path, traject, dynamic locus
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Abstract
The invention discloses an automatic control method for the flatness of a workbench of a numerical control machine tool of a flexible production line, which belongs to the technical field of machine tool processing and is characterized by comprising the following steps: step S1: determining a working table center 0 point, and setting a plurality of detection points along X coordinate and Y coordinate directions; step S2: collecting Z-direction coordinates of each detection point by using a probe; step S3: fitting a fitting plane of the actual position of the workbench according to a least square method; step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error; step S5: and automatically generating a compensation list of the corresponding relation according to the calculated flatness compensation quantity of each coordinate point. The flatness detection and compensation process of the machine tool workbench is completely free from manual intervention, so that the operation process is accurate and effective, and the operation efficiency is effectively improved.
Description
Technical Field
The invention relates to the technical field of machine tool machining, in particular to an automatic control method for the flatness of a workbench of a numerical control machine tool of a flexible production line.
Background
The flexible production line workbench is used as an exchangeable mechanism and is inserted between the production line and the plurality of machine tools to mainly play a role in bearing tools and parts, so that the adapting precision of the workbench when moving to each machine tool directly influences the machining quality of the parts; when the workbench is clamped on the machine tool saddle, the precision error of the machine tool body is directly transmitted and accumulated on the workbench, and is directly expressed as the flatness error of the workbench.
The conventional general solution is to use a magnetic meter seat and a dial indicator tool to manually detect, and when the flatness does not meet the processing requirement, the adjustment is performed by adopting a gasket or a machine tool foundation correction mode, the whole detection and adjustment process is long in time consumption and low in efficiency, and the automatic production operation of a flexible production line cannot be met.
The Chinese patent literature with publication number CN108214100A and publication date 2018, 06 and 29 discloses a detection and debugging method for the installation precision of a numerical control machine tool, which comprises the steps of firstly, preliminary placement and adjustment of the machine tool; checking the position of a sizing block of the machine tool; step three, static level adjustment of the machine tool; step four, dynamic level adjustment of the machine tool; checking whether the dial indicator is in a sound state; and step six, adjusting the flatness of the workbench of the machine tool.
The detection and debugging method for the installation precision of the numerical control machine disclosed in the patent document improves the operation reliability and safety of equipment and ensures the processing quality of the equipment. However, the precision detection and adjustment are carried out by using the level meter and the dial indicator instrument, so that the detection and adjustment process still takes time and labor, and the operation efficiency is affected.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line, and the flatness detection and compensation process of the workbench of the machine tool is completely free from manual intervention, so that the operation process is accurate and effective, and the operation efficiency is effectively improved.
The invention is realized by the following technical scheme:
the automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line is characterized by comprising the following steps of:
step S1: determining a center 0 point of a workbench, and setting a plurality of detection points along X coordinate and Y coordinate directions on the workbench according to equidistant symmetrical intervals;
Step S2: the workbench is controlled to move to a set detection point, and Z-direction coordinates of each detection point are collected by the probe;
step S3: fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point;
Step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error;
Step S5: and automatically generating a compensation list of a corresponding relation according to the calculated flatness compensation quantity of each coordinate point, automatically judging whether compensation is performed or not through a flatness deviation threshold set by a program, ending if the error is within a threshold range, automatically calling the compensation list to perform compensation if the error exceeds the threshold value, acquiring Z-direction precision data of each detection point again according to the step S2 after compensation, verifying a compensation result, determining the flatness of the workbench, ending if the requirement is met, and repeating the steps S3-S5 if the requirement is not met.
In the step S1, the X coordinate and Y coordinate of the detection point are。
In the step S2, the Z-direction coordinate of the detection point is。
In the step S3, a fitting plane of the actual position of the workbench is fitted through the method 1;
1 (1)
2, 2
3
Wherein,Is plane equationIs used for the control of the various coefficients of (a),Is thatIs a matrix of the (c) in the matrix,Is thatIs used for the column vectors of (a),For the X-axis coordinates of each detection point,For the Y-axis coordinates of each detection point,For the number of input points,The Z-axis coordinates of each inspection point.
In the step S4, the midpoint of the fitting plane is taken as a compensation reference point, namely the midpoint coordinates (0, 0) are brought into the fitting plane to calculateCoordinates in terms ofThe coordinates are reference points for calculating sag error compensation values in the X-direction and the Y-direction, respectively.
The sag error compensation value in the X direction isTaking the opposite number as the compensation value of the flatness, whereinIs the Z-axis projection coordinate in the X-direction.
The sag error compensation value in the Y direction isTaking the opposite number as the compensation value of the flatness, whereinIs the Z-axis projection coordinate in the Y-direction.
In the step S5, the automatic generation of the compensation list of the correspondence relationship means that the error compensation of the pitching and the left-right deflection of the workbench is completed in a sag compensation manner.
The beneficial effects of the invention are mainly shown in the following aspects:
1. In the invention, step S1: determining a center 0 point of a workbench, and setting a plurality of detection points along X coordinate and Y coordinate directions on the workbench according to equidistant symmetrical intervals; step S2: the workbench is controlled to move to a set detection point, and Z-direction coordinates of each detection point are collected by the probe; step S3: fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point; step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error; step S5: according to the calculated flatness compensation quantity of each coordinate point, a compensation list of a corresponding relation is automatically generated, whether the compensation is carried out is automatically judged through a flatness deviation threshold value set by a program, if the error is within a threshold value range, the compensation is finished, if the error exceeds the threshold value, the compensation list is automatically called to carry out the compensation, after the compensation, the Z-direction precision data of each detection point are collected again according to the step S2 to verify the compensation result, the flatness of the workbench is determined, if the requirement is met, the process is finished, if the requirement is not met, the steps S3-S5 are repeated, compared with the prior art, the whole machine tool workbench flatness detection and compensation process is completely free from manual intervention, the operation process can be accurate and effective, and the operation efficiency is effectively improved.
2. The invention can solve the problems that the flatness inspection and adjustment process is excessively dependent on manpower, long in time consumption and low in efficiency when the workbench of the flexible production line is exchanged to each machine tool, and has good applicability.
3. The invention can automatically detect and compensate the plane deviation of the workbench and improve the processing efficiency of the flexible production line.
4. The invention has high automation degree and can improve the automatic operation degree of the flexible production line.
Drawings
The invention will be further specifically described with reference to the drawings and detailed description below:
FIG. 1 is a flow chart of the present invention.
Detailed Description
Example 1
Referring to fig. 1, a method for automatically controlling the flatness of a workbench of a numerical control machine tool of a flexible production line comprises the following steps:
step S1: determining a center 0 point of a workbench, and setting a plurality of detection points along X coordinate and Y coordinate directions on the workbench according to equidistant symmetrical intervals;
Step S2: the workbench is controlled to move to a set detection point, and Z-direction coordinates of each detection point are collected by the probe;
step S3: fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point;
Step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error;
Step S5: and automatically generating a compensation list of a corresponding relation according to the calculated flatness compensation quantity of each coordinate point, automatically judging whether compensation is performed or not through a flatness deviation threshold set by a program, ending if the error is within a threshold range, automatically calling the compensation list to perform compensation if the error exceeds the threshold value, acquiring Z-direction precision data of each detection point again according to the step S2 after compensation, verifying a compensation result, determining the flatness of the workbench, ending if the requirement is met, and repeating the steps S3-S5 if the requirement is not met.
Compared with the prior art, the flatness detection and compensation process of the whole machine tool workbench is completely free from manual intervention, the operation process can be accurate and effective, and the operation efficiency is effectively improved.
Example 2
Referring to fig. 1, a method for automatically controlling the flatness of a workbench of a numerical control machine tool of a flexible production line comprises the following steps:
step S1: determining a center 0 point of a workbench, and setting a plurality of detection points along X coordinate and Y coordinate directions on the workbench according to equidistant symmetrical intervals;
Step S2: the workbench is controlled to move to a set detection point, and Z-direction coordinates of each detection point are collected by the probe;
step S3: fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point;
Step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error;
Step S5: and automatically generating a compensation list of a corresponding relation according to the calculated flatness compensation quantity of each coordinate point, automatically judging whether compensation is performed or not through a flatness deviation threshold set by a program, ending if the error is within a threshold range, automatically calling the compensation list to perform compensation if the error exceeds the threshold value, acquiring Z-direction precision data of each detection point again according to the step S2 after compensation, verifying a compensation result, determining the flatness of the workbench, ending if the requirement is met, and repeating the steps S3-S5 if the requirement is not met.
In the step S1, the X coordinate and Y coordinate of the detection point are。
In the step S2, the Z-direction coordinate of the detection point is。
The embodiment is a preferred implementation manner, can solve the problems that the flatness inspection and adjustment process is excessively dependent on manpower, long in time consumption and low in efficiency when the workbench of the flexible production line is exchanged to each machine tool, and has good applicability.
Example 3
Referring to fig. 1, a method for automatically controlling the flatness of a workbench of a numerical control machine tool of a flexible production line comprises the following steps:
step S1: determining a center 0 point of a workbench, and setting a plurality of detection points along X coordinate and Y coordinate directions on the workbench according to equidistant symmetrical intervals;
Step S2: the workbench is controlled to move to a set detection point, and Z-direction coordinates of each detection point are collected by the probe;
step S3: fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point;
Step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error;
Step S5: and automatically generating a compensation list of a corresponding relation according to the calculated flatness compensation quantity of each coordinate point, automatically judging whether compensation is performed or not through a flatness deviation threshold set by a program, ending if the error is within a threshold range, automatically calling the compensation list to perform compensation if the error exceeds the threshold value, acquiring Z-direction precision data of each detection point again according to the step S2 after compensation, verifying a compensation result, determining the flatness of the workbench, ending if the requirement is met, and repeating the steps S3-S5 if the requirement is not met.
In the step S1, the X coordinate and Y coordinate of the detection point are。
In the step S2, the Z-direction coordinate of the detection point is。
In the step S3, a fitting plane of the actual position of the workbench is fitted through the method 1;
1 (1)
2, 2
3
Wherein,Is plane equationIs used for the control of the various coefficients of (a),Is thatIs a matrix of the (c) in the matrix,Is thatIs used for the column vectors of (a),For the X-axis coordinates of each detection point,For the Y-axis coordinates of each detection point,For the number of input points,The Z-axis coordinates of each inspection point.
The embodiment is another preferred implementation manner, which can automatically detect and compensate the plane deviation of the workbench, and improves the processing efficiency of the flexible production line.
Example 4
Referring to fig. 1, a method for automatically controlling the flatness of a workbench of a numerical control machine tool of a flexible production line comprises the following steps:
step S1: determining a center 0 point of a workbench, and setting a plurality of detection points along X coordinate and Y coordinate directions on the workbench according to equidistant symmetrical intervals;
Step S2: the workbench is controlled to move to a set detection point, and Z-direction coordinates of each detection point are collected by the probe;
step S3: fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point;
Step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error;
Step S5: and automatically generating a compensation list of a corresponding relation according to the calculated flatness compensation quantity of each coordinate point, automatically judging whether compensation is performed or not through a flatness deviation threshold set by a program, ending if the error is within a threshold range, automatically calling the compensation list to perform compensation if the error exceeds the threshold value, acquiring Z-direction precision data of each detection point again according to the step S2 after compensation, verifying a compensation result, determining the flatness of the workbench, ending if the requirement is met, and repeating the steps S3-S5 if the requirement is not met.
In the step S1, the X coordinate and Y coordinate of the detection point are。
In the step S2, the Z-direction coordinate of the detection point is。
In the step S3, a fitting plane of the actual position of the workbench is fitted through the method 1;
1 (1)
2, 2
3
Wherein,Is plane equationIs used for the control of the various coefficients of (a),Is thatIs a matrix of the (c) in the matrix,Is thatIs used for the column vectors of (a),For the X-axis coordinates of each detection point,For the Y-axis coordinates of each detection point,For the number of input points,The Z-axis coordinates of each inspection point.
In the step S4, the midpoint of the fitting plane is taken as a compensation reference point, namely the midpoint coordinates (0, 0) are brought into the fitting plane to calculateCoordinates in terms ofThe coordinates are reference points for calculating sag error compensation values in the X-direction and the Y-direction, respectively.
The sag error compensation value in the X direction isTaking the opposite number as the compensation value of the flatness, whereinIs the Z-axis projection coordinate in the X-direction.
The sag error compensation value in the Y direction isTaking the opposite number as the compensation value of the flatness, whereinIs the Z-axis projection coordinate in the Y-direction.
In the step S5, the automatic generation of the compensation list of the correspondence relationship means that the error compensation of the pitching and the left-right deflection of the workbench is completed in a sag compensation manner.
The embodiment is the best mode, has high automation degree and can improve the automatic operation degree of the flexible production line.
The basic principle of the invention is as follows:
Determining a center 0 point of a workbench, setting a plurality of detection points in the direction of X, Y coordinates on the workbench according to equidistant symmetrical intervals, controlling the workbench to move to the set detection points, and acquiring Z-direction coordinates of each detection point by using a probe; fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point, respectively taking the coordinate points compensated by the pitch errors as Z-axis vertical projections of the central axis of the fitting plane along a machine tool coordinate system, taking the midpoint of the fitting plane as a compensation reference point, and calculating a planeness compensation value; and automatically generating a compensation list of the corresponding relation according to the calculated flatness compensation quantity of each coordinate point. The flatness compensation quantity is calculated through data processing by automatically detecting the flatness data of the workbench and fitting the actual position of the workbench, and the whole working process completely depends on automatic running of a program without manual intervention, so that the method is efficient and quick.
Claims (8)
1. The automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line is characterized by comprising the following steps of:
step S1: determining a center 0 point of a workbench, and setting a plurality of detection points along X coordinate and Y coordinate directions on the workbench according to equidistant symmetrical intervals;
Step S2: the workbench is controlled to move to a set detection point, and Z-direction coordinates of each detection point are collected by the probe;
step S3: fitting a fitting plane of the actual position of the workbench according to a least square method through the obtained Z-direction coordinates of each detection point;
Step S4: respectively carrying out vertical projection on the central axis of the fitting plane along the Z axis of the machine tool coordinate system according to the coordinate points compensated by the pitch error, taking the midpoint of the fitting plane as a compensation reference point, and calculating the flatness error;
Step S5: and automatically generating a compensation list of a corresponding relation according to the calculated flatness compensation quantity of each coordinate point, automatically judging whether compensation is performed or not through a flatness deviation threshold set by a program, ending if the error is within a threshold range, automatically calling the compensation list to perform compensation if the error exceeds the threshold value, acquiring Z-direction precision data of each detection point again according to the step S2 after compensation, verifying a compensation result, determining the flatness of the workbench, ending if the requirement is met, and repeating the steps S3-S5 if the requirement is not met.
2. The automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line according to claim 1, which is characterized in that: in the step S1, the X coordinate and Y coordinate of the detection point are。
3. The automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line according to claim 1, which is characterized in that: in the step S2, the Z-direction coordinate of the detection point is。
4. The automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line according to claim 1, which is characterized in that: in the step S3, a fitting plane of the actual position of the workbench is fitted through the method 1;
1 (1)
2, 2
3
Wherein,Is plane equationIs used for the control of the various coefficients of (a),Is thatIs a matrix of the (c) in the matrix,Is thatIs used for the column vectors of (a),For the X-axis coordinates of each detection point,For the Y-axis coordinates of each detection point,For the number of input points,The Z-axis coordinates of each inspection point.
5. The automatic control method for the flatness of a workbench of a numerical control machine tool of a flexible production line according to claim 4, wherein the method comprises the following steps: in the step S4, the midpoint of the fitting plane is taken as a compensation reference point, namely the midpoint coordinates (0, 0) are brought into the fitting plane to calculateCoordinates in terms ofThe coordinates are reference points for calculating sag error compensation values in the X-direction and the Y-direction, respectively.
6. The automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line, which is characterized in that: the sag error compensation value in the X direction isTaking the opposite number as the compensation value of the flatness, whereinIs the Z-axis projection coordinate in the X-direction.
7. The automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line, which is characterized in that: the sag error compensation value in the Y direction isTaking the opposite number as the compensation value of the flatness, whereinIs the Z-axis projection coordinate in the Y-direction.
8. The automatic control method for the flatness of the workbench of the numerical control machine tool of the flexible production line according to claim 1, which is characterized in that: in the step S5, the automatic generation of the compensation list of the correspondence relationship means that the error compensation of the pitching and the left-right deflection of the workbench is completed in a sag compensation manner.
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| CN119644764A (en) * | 2025-02-18 | 2025-03-18 | 深圳市睿达科技有限公司 | A method for adaptive control of tabletop of knife cutting system |
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| CN119644764A (en) * | 2025-02-18 | 2025-03-18 | 深圳市睿达科技有限公司 | A method for adaptive control of tabletop of knife cutting system |
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