KR20130009433A - Method and device for compensating position to change tools of a machine tool - Google Patents
Method and device for compensating position to change tools of a machine tool Download PDFInfo
- Publication number
- KR20130009433A KR20130009433A KR1020110070551A KR20110070551A KR20130009433A KR 20130009433 A KR20130009433 A KR 20130009433A KR 1020110070551 A KR1020110070551 A KR 1020110070551A KR 20110070551 A KR20110070551 A KR 20110070551A KR 20130009433 A KR20130009433 A KR 20130009433A
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- South Korea
- Prior art keywords
- tool
- change position
- value
- tool change
- displacement
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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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
- B23Q15/26—Control or regulation of position of tool or workpiece of angular position
-
- 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
- B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
-
- 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
-
- 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
- B23Q3/157—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling of rotary tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
Abstract
Description
The present invention relates to a tool changer for exchanging a tool on a spindle of a machine tool, and more particularly, to an apparatus and method for correcting a tool change position of a tool changer.
In general, a machine tool such as a machining center is equipped with an automatic tool changer (ATC) for exchanging a tool mounted on a spindle.
The automatic tool changer is provided with a change arm that receives the tool from the standby port of the tool magazine, rotates it at an angle, feeds the spindle, and collects the tool mounted on the spindle. The operation of the automatic tool changer is described in detail in Korean Patent No. 0656655 filed by the present applicant.
As shown in FIG. 1, in the conventional
Here, the
Moreover, the tool once pressed into the main shaft is more difficult to withdraw and the change arm or the main shaft has a problem of bending when it exceeds the limit of elastic deformation. Even if the tool is large or eccentric, the same problem arises that the tool change position is not correct because the tool change position is set according to the standard tool.
On the other hand, although not by the change of the tool exchange position, a number of applications for solving the problem in the case where the position of the tool is changed due to the deformation of the main axis has been applied. For example, Korean Patent No. 0264247 (S & U Precision Co., Ltd.) and Korean Patent No. 0332379 (Daewoo General Machinery Co., Ltd.) disclose a method and apparatus for correcting according to the thermal displacement of a spindle. 0098207 (Hwacheon Technological Co., Ltd.) discloses a method for correcting a positional displacement of a tool, and Japanese Patent No. 0198525 (LG Co., Ltd.) discloses a method and apparatus for correcting a position of a tool.
Furthermore, Korean Unexamined Utility Model No. 2000-0015321 (Daewoo Heavy Industries Co., Ltd.) discloses a method and a device for correcting a case where the object of thermal displacement is expanded to the overall machine tool.
The present invention was created to improve the problems with the position correction device and method of the conventional tool changer as described above, and by correcting the changed tool change position, it is possible to smoothly change the tool of the spindle and due to the tool change defect It is an object of the present invention to provide a position correction device and a method of a tool changer that can prevent the tool, the tool changer, and the spindle from being bent or broken.
In addition, there is another object to provide a position change device and method of the tool changer that can be changed smoothly to the tool of the spindle by correcting to a tool change position for the corresponding tool if it is not a standard tool.
In order to achieve the object as described above, the position correction method of the tool changer according to the present invention comprises the steps of measuring the displacement of the tool changer having a change arm in the machine tool to change the tool in the main shaft, and the preset tool And calculating a tool change position correction value by comparing the displacement allowance value and the displacement value measured in the displacement measuring step.
In the displacement measuring step, the displacement in the rotation axis (Z axis) of the change arm and the direction (X axis, Y axis) crossing the axis can be measured.
In addition, the position correction method of the tool changer according to the present invention, if the tool to be replaced is selected, the step of determining the type of tool, and if the type of the tool is confirmed according to the pre-stored value of the tool of the tool And correcting the exchange position value.
The present invention may further include adjusting the tool change position according to the tool change position correction value when the tool change position value is corrected, and adjust the tool change position by adjusting the feed position of the main shaft.
The method may further include setting a reference value for the correction allowable range of the tool change position, and outputting a warning signal when the tolerance range is greater than the allowable value by comparing the preset reference value with the correction value of the tool changer.
On the other hand, the position correction device of the tool changer according to the present invention, the displacement measuring means for measuring the displacement of the tool changer for changing the tool of the main shaft with a change arm in the machine tool, and the preset tool change allowance and the displacement And a control unit for comparing the displacement value measured from the measuring means and calculating a tool change position correction value.
The displacement measuring means may measure at least one of a displacement of the change arm in the axial direction (Z axis) of the rotation axis thereof and a displacement in the direction (X axis, Y axis) across the axis (Z axis). Can be.
According to the position correction device and method of the tool changer according to the present invention as described above, it is possible to smoothly exchange the tool of the spindle, the tool and the tool changer and the spindle is bent or broken due to the poor tool replacement It can prevent, and in particular, there is an effect that can prevent the operation rate is lowered during unmanned operation.
In addition, if the standard tool is not corrected by the tool replacement position for the tool has the effect that can be replaced smoothly the tool of the spindle.
1 is a perspective view showing a tool changer of a machine tool,
2 is a schematic configuration diagram showing a tool change position correcting apparatus of a machine tool according to the present invention;
3 is a side view of FIG. 1;
4 is a cross-sectional view taken along the line AA of FIG. 3;
5 to 7 are flowcharts illustrating a method for correcting a tool change position of a machine tool according to the present invention.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 4, the position correcting device of the tool changer according to an embodiment of the present invention, the displacement measuring means 10 for measuring the displacement of the
The
As the displacement measuring means 10, a gap sensor for detecting a gap may be used. The
The
In addition, as shown in FIG. 3, two
The
The tool
In addition, the tool
The
In addition, the
On the other hand, the
5 to 7 will be described a position correction method of the tool changer according to the present invention.
In the position correction method of the tool changer according to the present invention, at least one of the step (S10) of correcting the tool change position according to the type of the tool, and the step (S20) of correcting the tool change position according to the displacement of the tool changer. It includes one step.
Hereinafter, the tool change position correction step S10 according to the type of tool will be described first, and the tool change position correction step S20 according to the displacement of the tool changer will be described. A description will be given of an embodiment of performing a tool change position correcting step (S20) according to the displacement of the tool changer.
Referring to FIG. 5, the tool change position correcting step (S10) according to the type of the tool includes determining the type of the tool when the tool to be replaced is selected (S11), and checking the type of the tool when the type of the tool is confirmed. Accordingly, the step of correcting the tool change position value of the corresponding tool with the previously stored value (S12), and comparing the reference value for the preset allowable compensation range with the value of the tool changer to warn if the value of the tool changer exceeds the allowable value. If the signal is output and corrected, the tool change position is adjusted according to the tool change position correction value (S13).
When a specific tool is selected by the
If it is a standard tool, the standard tool position value is used as it is without a correction command. If it is not a standard tool (for example, a large tool or an asymmetric tool), the tool is changed from the tool
When the tool change position correction value is determined in step S12, a step (S13) of checking whether the position adjustment is possible based on the correction value is performed.
In this step S13, first, a limit for allowing correction of the tool change position is set, and the reference value for the allowable range of the correction is compared with the correction value of the tool changer. As a result of the comparison, a warning signal is output if the tool changer's correction value is more than the allowable value. That is, if the tool change position cannot be healed by compensation, the machine is stopped and the operator is called. If the correction value exists within the allowable value and the correction is possible, the command for adjusting the tool change position is issued according to the tool change position correction value. The reference value for the allowable correction range of the tool change position is stored in the tool
In this way, the
Here, as a method of adjusting the tool change position, there are (1) a method of adjusting the feed position of the
(1) In the case of adopting the method of adjusting the feed position of the
After the tool change position is corrected through the tool change position correcting step S10 according to the type of tool, the tool change position is corrected again through the tool change position correcting step S20 by the displacement of the tool changer.
Referring to Figure 6, the tool change position correction step (S20) according to the displacement of the tool changer, measuring the displacement of the tool changer (S21), setting the tool change position reference value and the tool change position reference value and the Computing the tool change position correction value by comparing the displacement value measured in the displacement measurement step (S21) (S22), Compensation of the tool change position by comparing the compensation value of the tool change position with the reference value for the preset allowable compensation range If the value is more than the allowable value and outputs a warning signal, if the correction is possible, the step of adjusting the tool change position according to the tool change position correction value (S23).
In the displacement measuring step S21, the displacement of the change arm in the rotation axis (Z axis) and the direction crossing the axis (X axis, Y axis) is measured using the
When the displacement value of the tool change position is measured in the displacement measuring step (S21), it is determined whether to compensate through the calculation step (S22).
In the calculation step (S22), first, the tool change position reference value is set. The tool change position reference value may utilize the value initially measured in the displacement measuring step S21, or may utilize the tool
After the tool change position correction value is calculated in the calculation step (S22), it is determined whether the adjustment is possible based on the correction value (S23). This step is the same as step S13 of the tool change position correcting step S10 according to the type of tool.
7, an embodiment of performing the tool change position correction step S20 according to the displacement of the tool changer in succession to the tool change position correction step S10 according to the type of the tool will be described.
First, a tool
When the programmed tool change command is issued, the tool to be exchanged is selected and the tool type is checked. 1) If the tool is a standard tool, the standard tool position value stored in the tool change position database (21) is used as it is. Is corrected by the tool change position value of the corresponding tool stored in the tool change position database 21 (S12).
Then, after measuring the displacement of the tool changer (S21), the tool change position correction value is calculated by comparing the tool change position reference value with the displacement value measured in the displacement measurement step (S21).
After the correction is determined, it is again determined whether the correction is possible by comparing the reference value of the allowable range with the correction value of the tool change position. 1) If correction is impossible because the correction value is over the allowable value, 2) If the correction is possible, adjust the tool change position according to the tool change position correction value. (S13) (S23) In the adjusting step (S13) (S23), a command for adjusting the tool change position is output in accordance with the tool change position correction value, and the tool change position is changed accordingly. For example, when a command for feeding the
When the adjustment of the tool change position is completed, the
The tool change position correction value is updated in the tool
10: displacement measuring means 11: gap sensor
20: control unit 21: tool change position database
22: calculator 23: tool management program
Claims (7)
Computing a tool change position correction value by comparing a preset tool change position reference value and the displacement value measured in the displacement measuring step (S22).
And at least one of displacements in the rotation axis direction (Z axis) of the change arm (114) and the displacements in the directions crossing the axis (X axis, Y axis).
Determining a type of tool when a tool to be replaced is selected (S11); And
Compensating the tool change position of the machine tool, further comprising the step (S12) of correcting the tool change position value of the corresponding tool with a pre-stored value according to the type of the tool when the type of the tool is confirmed.
And adjusting the tool change position according to the tool change position correction value (S13, S23) when the tool change position value is corrected.
Compensating the tool change position of the machine tool, characterized in that it further comprises a step of outputting a warning signal when the compensation value of the tool change position is greater than the allowable value by comparing the reference value for the preset allowable compensation range with the correction value of the tool change position. Way.
And a control unit (20) which calculates a tool change position correction value by comparing a preset tool change allowance with a displacement value measured by the displacement measuring means (10).
The change arm 114 measures at least one of displacements in the axial direction (Z axis) of the rotation axis 113 and displacements in the directions (X axis, Y axis) across the axis (Z axis). Tool exchange position correction device for a machine tool, characterized in that the.
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KR1020110070551A KR20130009433A (en) | 2011-07-15 | 2011-07-15 | Method and device for compensating position to change tools of a machine tool |
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KR1020110070551A KR20130009433A (en) | 2011-07-15 | 2011-07-15 | Method and device for compensating position to change tools of a machine tool |
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Cited By (7)
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CN103551919A (en) * | 2013-10-17 | 2014-02-05 | 北京工业大学 | Measuring device of repeated positioning accuracy of automatic tool changing of rotary manipulator |
CN105436964A (en) * | 2015-12-02 | 2016-03-30 | 北京中丽制机工程技术有限公司 | Tool correction device for automatic tool replacing mechanism |
JP2019028502A (en) * | 2017-07-25 | 2019-02-21 | ファナック株式会社 | Exchange rotational position determining apparatus and exchange rotational position determining method |
KR20190096018A (en) | 2018-02-08 | 2019-08-19 | 두산공작기계 주식회사 | Device for modifying axis shift of machine tool and method thereof |
KR20200126728A (en) * | 2019-04-30 | 2020-11-09 | 두산공작기계 주식회사 | A machine tool having a ram spindle |
DE102019127052A1 (en) * | 2019-10-08 | 2021-04-08 | Grob-Werke Gmbh & Co. Kg | Method for determining at least one transfer position in a machine tool and machine tool |
CN113231886A (en) * | 2021-04-30 | 2021-08-10 | 成都飞机工业(集团)有限责任公司 | Machine tool setting detection method |
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2011
- 2011-07-15 KR KR1020110070551A patent/KR20130009433A/en not_active Application Discontinuation
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103551919A (en) * | 2013-10-17 | 2014-02-05 | 北京工业大学 | Measuring device of repeated positioning accuracy of automatic tool changing of rotary manipulator |
CN103551919B (en) * | 2013-10-17 | 2016-01-06 | 北京工业大学 | A kind of repetitive positioning accuracy measurement mechanism of rotating machine arm automatic tool changer |
CN105436964A (en) * | 2015-12-02 | 2016-03-30 | 北京中丽制机工程技术有限公司 | Tool correction device for automatic tool replacing mechanism |
JP2019028502A (en) * | 2017-07-25 | 2019-02-21 | ファナック株式会社 | Exchange rotational position determining apparatus and exchange rotational position determining method |
US10695878B2 (en) | 2017-07-25 | 2020-06-30 | Fanuc Corporation | Tool change rotary position determining device and tool change rotary position determining method |
KR20190096018A (en) | 2018-02-08 | 2019-08-19 | 두산공작기계 주식회사 | Device for modifying axis shift of machine tool and method thereof |
KR20200126728A (en) * | 2019-04-30 | 2020-11-09 | 두산공작기계 주식회사 | A machine tool having a ram spindle |
DE102019127052A1 (en) * | 2019-10-08 | 2021-04-08 | Grob-Werke Gmbh & Co. Kg | Method for determining at least one transfer position in a machine tool and machine tool |
CN112621324A (en) * | 2019-10-08 | 2021-04-09 | 格鲁博-工厂有限及两合公司 | Method for determining at least one transfer position in a machine tool and machine tool |
CN113231886A (en) * | 2021-04-30 | 2021-08-10 | 成都飞机工业(集团)有限责任公司 | Machine tool setting detection method |
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