CN116765937A - Positioning accuracy detection and correction method for flexible workbench of machine tool - Google Patents
Positioning accuracy detection and correction method for flexible workbench of machine tool Download PDFInfo
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- CN116765937A CN116765937A CN202310938255.1A CN202310938255A CN116765937A CN 116765937 A CN116765937 A CN 116765937A CN 202310938255 A CN202310938255 A CN 202310938255A CN 116765937 A CN116765937 A CN 116765937A
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 22
- 238000011084 recovery Methods 0.000 claims description 2
- 238000003491 array Methods 0.000 abstract description 4
- 230000001419 dependent effect Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Classifications
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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
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Control Of Machine Tools (AREA)
Abstract
The invention belongs to the technical field of machine tool precision detection, and particularly relates to a positioning precision detection and correction method for a flexible workbench of a machine tool. At present, the positioning accuracy detection and correction of the flexible workbench are not standardized and standard-dependent. The invention uses a laser probe as a measuring tool, sequentially adjusts all POGO columns on a flexible workbench to an initial position, a maximum stroke height and an initial position to obtain Z-axis data, namely two-dimensional arrays N1, N2 and N3, calculates the difference between the N2-N1 and the theoretical maximum stroke height Zmax to obtain a two-dimensional array Nm 2 Wherein the value corresponding to the maximum absolute value is the positioning precision Pr; calculating the difference value of N3-N1 to obtain a two-dimensional array Nm 3 The value corresponding to the maximum absolute value is the repeated positioning accuracy Prs. And comparing the accuracy with the qualified accuracy in the factory specification, judging whether the accuracy is in the range of the qualified accuracy value, and correcting. The method is simple, convenient and quick, can effectively verify the precision condition of the flexible workbench of the machine tool, and has high practicability.
Description
Technical Field
The invention belongs to the technical field of machine tool precision detection, and particularly relates to a positioning precision detection and correction method for a flexible workbench of a machine tool.
Background
Due to the material characteristics and technical advantages, the composite material is used in an aircraft in an increasing amount. The composite material part has the characteristics of complex outline, different curvature, relatively low rigidity and the like, and the automatic processing of the composite material part becomes a new technical problem in the field of aviation manufacturing. A set of flexible workbench (flexible fixture) is matched with a numerical control machine tool, so that the method is a solution for automatic processing of the current composite material piece.
The flexible workbench comprises a plurality of POGO columns, each POGO column has a coordinate servo positioning function, can adaptively match irregular composite material workpieces, and plays a role in clamping and fixing the composite material workpieces. Therefore, the positioning accuracy of the flexible table is a precondition for the whole processing accuracy to be ensured.
At present, the positioning accuracy detection and correction of the flexible workbench are not standardized and standard-dependent.
Disclosure of Invention
The invention solves the problem of providing a positioning accuracy detection and correction method for a flexible workbench of a machine tool, which is used for simply, conveniently, quickly and accurately detecting and correcting the positioning accuracy of the flexible workbench of the machine tool.
The invention provides a positioning accuracy detection and correction method for a flexible workbench of a machine tool, which comprises the following steps:
s1, using a laser probe as a measuring tool, and installing the measuring tool on a main shaft head of a machine tool;
s2, adjusting all POGO columns on the flexible workbench to be at a height Z 0 The initial position is controlled to be contacted with each POGO column respectively so as to obtain Z-axis data of each POGO column, namely a two-dimensional array N1;
s3, adjusting all POGO columns on the flexible workbench to the maximum travel height, and obtaining Z-axis data of each POGO column, namely a two-dimensional array N2, by controlling the laser probe;
s4, adjusting all POGO columns on the flexible workbench to the height Z again 0 Z-axis data of each POGO column, namely a two-dimensional array N3, are obtained by controlling the laser probe;
s5, calculating the difference value of N2-N1 for each POGO column to obtain a difference value two-dimensional array Nm 1 Further calculating the difference between the two-dimensional array Nm and the theoretical maximum stroke height Zmax to obtain the two-dimensional array Nm 2 Two-dimensional array Nm 2 The value corresponding to the maximum value of the absolute value is the positioning precision Pr; calculating the difference of N3-N1 for each POGO column to obtain a two-dimensional array Nm 3 Two-dimensional array Nm 3 The value corresponding to the maximum value of the absolute value is the repeated positioning precision Prs;
s6, comparing the positioning precision Pr and the repeated positioning precision Prs with the qualified precision in the factory specification, and if the positioning precision Pr and the repeated positioning precision Prs are within the range of the qualified precision value, judging that the positioning precision Pr and the repeated positioning precision Prs are qualified; otherwise, if the detection is not qualified, the POGO column at the out-of-tolerance position needs to be found out, and the precision adjustment and recovery work is carried out until the detection is qualified again.
Advantageously, the laser probe is a Raney laser probe.
Advantageously, the laser probe is controlled to be in contact with the top center of the POGO pin.
Advantageously, the detected ambient temperature should be kept consistent with the ambient temperature at the time of machine tool machining.
Advantageously, each POGO operating speed needs to be consistent.
Advantageously, the laser probe contact the POGO pins should be relatively vertical.
Advantageously, the speed at which the laser probe contacts each POGO column must be kept consistent.
Advantageously, the detection order should be performed in the array order.
The beneficial effects are that: the method is simple, convenient and quick, can effectively verify the precision condition of the flexible workbench of the machine tool, and has high practicability.
Drawings
The illustrative examples, as well as a preferred mode of use, further objectives, and descriptions thereof, will best be understood by reference to the following detailed description of an example of the invention when read in conjunction with the accompanying drawings, wherein:
FIG. 1 is a schematic view of a structure in which a laser probe is mounted on a machine tool spindle of a flexible table of the machine tool;
FIG. 2 is at Z 0 A state diagram of the first detection is highly performed;
FIG. 3 at Z MAX A state diagram of the detection;
FIG. 4 is at Z 0 A schematic diagram of the state in which the second detection is performed.
Detailed Description
The disclosed examples will be described more fully with reference to the accompanying drawings, in which some, but not all of the disclosed examples are shown. Indeed, many different examples may be described and should not be construed as limited to the examples set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The positioning accuracy detection and correction method for the flexible workbench of the machine tool in certain embodiment comprises the following steps:
step one, a machine tool Raney Shaoxing laser probe is used as a measuring tool and is arranged on a machine tool spindle head (see figure 1);
step two, all POGO columns (3X 8 matrix arrangement, 18 pieces in total) are operated to Z 0 Namely, an initial position (see fig. 2), a machine tool is operated to the center position of each POGO column through X, Y coordinates, then is operated through the Z axis of the machine tool, and is respectively contacted with each POGO column to obtain Z axis data of each POGO column, and the Z axis data are recorded as two-dimensional arrays N1, wherein the N1 arrays are shown in the table I;
list one
| H | -0.032 | -0.038 | -0.015 |
| G | -0.028 | -0.027 | -0.018 |
| F | -0.028 | -0.011 | -0.010 |
| E | -0.023 | -0.005 | -0.002 |
| D | -0.015 | -0.018 | -0.011 |
| C | -0.024 | -0.002 | -0.004 |
| B | -0.022 | 0 | -0.014 |
| A | -0.035 | -0.020 | -0.011 |
| 1 | 2 | 3 |
Step three, adjusting all POGO columns on a flexible workbench to the maximum travel height of 500mm, and obtaining Z-axis data of each POGO column by controlling a laser probe, wherein the two-dimensional arrays N2 and N2 are shown in a table II (see a figure III);
watch II
Step four, adjusting all POGO columns on the flexible workbench to the height Z again 0 Z-axis data of each POGO column is obtained by controlling a laser probe, namely, a two-dimensional array N3 and an N3 array are shown in a table III (see a figure III);
watch III
| H | 0 | -0.001 | 0.019 |
| G | 0.004 | 0.008 | 0.020 |
| F | 0.001 | 0.024 | 0.028 |
| E | 0.005 | 0.028 | 0.032 |
| D | -0.011 | -0.008 | 0.023 |
| C | -0.021 | 0 | 0 |
| B | -0.023 | 0.002 | -0.012 |
| A | -0.021 | -0.024 | -0.010 |
| 1 | 2 | 3 |
Step five, calculating the difference value of N2-N1 for each POGO column to obtain a difference value two-dimensional array Nm1, and further calculating the two-dimensional array Nm 1 The difference from the theoretical maximum stroke height of 500mm to obtain a two-dimensional array Nm 2 (see Table IV), two-dimensional array Nm 2 The value corresponding to the maximum value of the absolute value is the positioning precision Pr=0.041 mm; calculating the difference of N3-N1 for each POGO column to obtain a two-dimensional array Nm 3 (see Table five), two-dimensional array Nm 3 The value corresponding to the maximum absolute value of the number is the repeated positioning accuracy Prs= -0.038mm.
Table four
TABLE five
| H | -0.032 | -0.037 | -0.034 |
| G | -0.032 | -0.035 | -0.038 |
| F | -0.029 | -0.035 | -0.038 |
| E | -0.028 | -0.033 | -0.034 |
| D | -0.004 | -0.010 | -0.034 |
| C | -0.003 | -0.002 | -0.004 |
| B | 0.001 | -0.002 | -0.002 |
| A | -0.014 | 0.004 | -0.001 |
| 1 | 2 | 3 |
Step six, comparing the positioning precision Pr=0.041 mm and the repeated positioning precision Prs= -0.038mm with qualified precision values (Pr is not more than +/-0.100 mm and Prs is not more than +/-0.050 mm) in factory specifications, and comparing the detected values in the range of the qualified precision values to show that the positioning precision and the repeated positioning precision of the flexible workbench of the machine tool are qualified.
Thus, the positioning accuracy detection and correction of the flexible workbench are finished.
Different examples of the systems, devices, and methods disclosed herein include various components, features, and functions. It should be understood that the various examples of the systems, devices, and methods disclosed herein may include any of the components, features, and functions of any of the other examples of the systems, devices, and methods disclosed herein in any combination or any sub-combination, and all such possibilities are intended to be within the scope of the present invention.
The description of the different advantageous arrangements has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the examples in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, the different advantageous examples may describe different advantages compared to other advantageous examples. The example or examples selected are chosen and described in order to best explain the principles of the examples, the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various examples with various modifications as are suited to the particular use contemplated.
Claims (8)
1. The method for detecting and correcting the positioning accuracy of the flexible workbench of the machine tool is characterized by comprising the following steps of:
s1, using a laser probe as a measuring tool, and installing the measuring tool on a main shaft head of a machine tool;
s2, adjusting all POGO columns on the flexible workbench to be at a height Z 0 I.e. initial position, is obtained by controlling the laser probe to be in contact with each POGO column respectivelyZ-axis data of each POGO column, namely a two-dimensional array N1;
s3, adjusting all POGO columns on the flexible workbench to the maximum travel height, and obtaining Z-axis data of each POGO column, namely a two-dimensional array N2, by controlling the laser probe;
s4, adjusting all POGO columns on the flexible workbench to the height Z again 0 Z-axis data of each POGO column, namely a two-dimensional array N3, are obtained by controlling the laser probe;
s5, calculating the difference value of N2-N1 for each POGO column to obtain a difference value two-dimensional array Nm 1 Further calculating the difference between the two-dimensional array Nm and the theoretical maximum stroke height Zmax to obtain the two-dimensional array Nm 2 Two-dimensional array Nm 2 The value corresponding to the maximum value of the absolute value is the positioning precision Pr; calculating the difference of N3-N1 for each POGO column to obtain a two-dimensional array Nm 3 Two-dimensional array Nm 3 The value corresponding to the maximum value of the absolute value is the repeated positioning precision Prs;
s6, comparing the positioning precision Pr and the repeated positioning precision Prs with the qualified precision in the factory specification, and if the positioning precision Pr and the repeated positioning precision Prs are within the range of the qualified precision value, judging that the positioning precision Pr and the repeated positioning precision Prs are qualified; otherwise, if the detection is not qualified, the POGO column at the out-of-tolerance position needs to be found out, and the precision adjustment and recovery work is carried out until the detection is qualified again.
2. The positioning accuracy detection correction method according to claim 1, characterized in that: the laser probe adopts a Raney Shaoxing laser probe.
3. The positioning accuracy detection correction method according to claim 1, characterized in that: the laser probe is controlled to be contacted with the top center position of the POGO column.
4. The positioning accuracy detection correction method according to claim 1, characterized in that: the detected ambient temperature is kept consistent with the ambient temperature during machine tool processing.
5. The positioning accuracy detection correction method according to claim 1, characterized in that: the running speed of each POGO needs to be kept consistent.
6. The positioning accuracy detection correction method according to claim 1, characterized in that: the laser probe should contact the POGO posts in a relatively vertical direction.
7. The positioning accuracy detection correction method according to claim 1, characterized in that: the speed at which the laser probe contacts each POGO pin needs to be kept consistent.
8. The positioning accuracy detection correction method according to claim 1, characterized in that: the detection order should be performed in the array order.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310938255.1A CN116765937A (en) | 2023-07-28 | 2023-07-28 | Positioning accuracy detection and correction method for flexible workbench of machine tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310938255.1A CN116765937A (en) | 2023-07-28 | 2023-07-28 | Positioning accuracy detection and correction method for flexible workbench of machine tool |
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