KR102030184B1 - Setting apparatus and method for work coordination of machine tool - Google Patents

Setting apparatus and method for work coordination of machine tool Download PDF

Info

Publication number
KR102030184B1
KR102030184B1 KR1020130008099A KR20130008099A KR102030184B1 KR 102030184 B1 KR102030184 B1 KR 102030184B1 KR 1020130008099 A KR1020130008099 A KR 1020130008099A KR 20130008099 A KR20130008099 A KR 20130008099A KR 102030184 B1 KR102030184 B1 KR 102030184B1
Authority
KR
South Korea
Prior art keywords
pressure data
data
workpiece
pressure
machine tool
Prior art date
Application number
KR1020130008099A
Other languages
Korean (ko)
Other versions
KR20140095650A (en
Inventor
조원균
Original Assignee
두산공작기계 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 두산공작기계 주식회사 filed Critical 두산공작기계 주식회사
Priority to KR1020130008099A priority Critical patent/KR102030184B1/en
Publication of KR20140095650A publication Critical patent/KR20140095650A/en
Application granted granted Critical
Publication of KR102030184B1 publication Critical patent/KR102030184B1/en

Links

Images

Classifications

    • 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
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/006—Equipment for precise positioning of tool or work into particular locations not otherwise provided for positioning by bringing a stop into contact with one of two or more stops, fitted on a common carrier
    • 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
    • B23Q15/225—Control or regulation of position of tool or workpiece in feed control, i.e. approaching of tool or work in successive decreasing velocity steps
    • 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
    • B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
    • B23Q17/2233—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work for adjusting the tool relative to the workpiece

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Numerical Control (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for setting a work origin of a machine tool, and more particularly, to detect a pressure contacting a work piece during transportation of a turret equipped with a tool, and to work the work origin twisted by irregular sections of the work piece By using the pressure compensation and automatically set to the compensated data provides a device and method for automatically setting the work origin of the machine tool that can reduce the set time and increase the accuracy of the machining.

Description

Automatic setting of work origin of machine tool and method {SETTING APPARATUS AND METHOD FOR WORK COORDINATION OF MACHINE TOOL}

The present invention relates to an apparatus and method for automatically setting the working origin of a machine tool, and more particularly, to accurately detect the pressure of the working material during the conveyance of a turret equipped with a tool to automatically determine the correct working origin. An apparatus and a method for setting the same are provided.

In general, a numerical control (NC) -based machine tool refers to a device that automatically controls the operation of a machine by using numerical information consisting of a code and a numerical value.

Numerical control-based machine tools must set zero points for the X, Y, and Z axes before starting the first operation when the power is turned on to change the tool or perform a new job. That is, the position of the mechanical origin coincides with the coordinate calculation reference point in the controller. At this time, limit switch is installed at one end of X, Y axis and contact or non-contact sensor is installed at other end of axis to set the zero point based on the current position. The process is automatic and common. On the other hand, since a tool having a non-uniform length is attached to the Z axis, the total length of the Z axis is not constant according to the tool. Therefore, in setting the zero point of the Z axis, the point of contact with the machining table facing the end of the tool by manual operation while checking the length of the tool with the naked eye is set to the zero point of the Z axis or set to be recognized by a contact sensor. Accordingly, the working origin of the Z axis is generally set by manually inputting the height of the workpiece to the controller or visually checking the length of the tool and approaching the workpiece.

However, this method has the following problems.

First, the manual operation by visual confirmation decreases the accuracy of machining because it captures and sets the moment when the end of the tool contacts the upper surface of the work table. Even visual contact may result in errors at the time of machining because the actual tool and work table are not connected.

Second, since the process of setting the work origin is required every time a variety of processing materials, tools are changed, it takes a lot of time before processing and there is a problem in that the productivity is reduced.

The present invention was devised to solve the above problems, and detects the pressure contacting the workpiece during the transfer of the turret equipped with the tool to reduce the pressure of the work origin twisted by the irregular cross section of the workpiece. It is an object of the present invention to provide an apparatus and method for automatically setting the work origin of a machine tool, which can shorten the setting time and increase the accuracy of machining by automatically compensating and automatically setting the compensated data.

The method for setting the working origin of the machine tool of the present invention for achieving the above technical problem, in the method for setting the working origin in the machine tool, the machine tool transfers a turret equipped with a tool to a workpiece material Measuring the contact pressure between the workpiece and the workpiece; Importing the standard pressure data of the workpiece from the pre-stored data with respect to the measured pressure data, and comparing the measured pressure data with the standard pressure data; And setting a current position as a working origin when the measured pressure data and the standard pressure data coincide with each other, and if not, compensating by the difference between the measured pressure data and the standard pressure data to set the working origin. It includes.

The compensation may include converting a pressure difference between the measured pressure data and the standard pressure data into a distance, and updating the reflected distance by reflecting the converted distance into a previously set work origin.

On the other hand, the apparatus for setting the working origin of the machine tool of the present invention for achieving the above technical problem, is mounted on the turret of the machine tool pressure for sensing the pressure when the tool and the workpiece material is contacted by the feed of the turret Detection sensor; A data storage unit for storing standard pressure data in advance according to the type of the workpiece, and storing the data in a database; A comparator comparing the actual pressure data sensed by the pressure sensing sensor with standard pressure data of the workpiece pre-stored in the data storage unit and determining a match; A compensator for converting the distance as a difference in pressure between the actual pressure data and the standard pressure data and compensating the converted distance to the previously set work origin when it is determined that the discrepancy is inconsistent; And setting the current position as the work origin when the actual pressure data and the standard pressure data coincide through the comparator, and instructing the compensator to perform a compensation corresponding to the difference between the actual pressure data and the standard pressure data if it does not match. And a controller configured to receive the compensated data from the compensator and set the work origin.

The apparatus and method for automatically setting the work origin of the machine tool according to the present invention, which is made as described above, sets the work origin manually by automatically setting the work origin using the pressure sensed by the pressure sensing sensor embedded in the turret. Compared with the method, the error rate can be reduced by reducing the error that occurs when setting the working origin.

In addition, by setting the work origin automatically instead of setting the work origin by manual operation by the operator, the setting time can be shortened in spite of frequent change of the workpiece, and also rapid feeding by automatic operation is possible. The machine tool can be used to monitor the working status in real time.

1 is a block diagram of an automatic work origin setting apparatus of a machine tool according to an embodiment of the present invention.
2 is a flowchart illustrating a process of databaseting standard pressure information on a workpiece in a data storage unit according to an exemplary embodiment of the present invention.
3 is an exemplary view showing a method of measuring contact pressure with a workpiece according to an embodiment of the present invention.
4 is a flowchart illustrating a method of automatically setting a work origin of a machine tool according to an exemplary embodiment of the present invention.
FIG. 5 is a flowchart illustrating a method of performing compensation of FIG. 4 in detail. FIG.
6 is an exemplary view showing a difference in pressure in contact with an irregular area of a workpiece.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms.

Hereinafter, an apparatus for automatically setting a work origin of a machine tool according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of an automatic work origin setting apparatus of a machine tool according to an embodiment of the present invention.

The apparatus for automatically setting the work origin of a machine tool according to an embodiment of the present invention includes a turret 100 equipped with a tool, a data storage unit 110, an A / D conversion unit 120, a comparator 130, and a display unit 140. , A controller 150, a compensator 160, and a driver 170.

The turret 100 is driven by the servo motor 100a and a tool is mounted on the header. Then, the inside of the turret 100 is provided with a pressure sensor 100b for detecting the pressure detects the contact pressure applied by the contact between the tool and the workpiece during transfer.

The A / D converter 120 receives analog pressure data detected through the pressure sensor 100b of the turret 100 and converts the pressure data into a digital value.

The data storage unit 110 stores the pressure data converted through the A / D conversion unit 120 and makes a database. In this case, the data storage unit 110 not only stores the pressure data detected through the pressure sensor 100b but also matches and stores the detected pressure data and the type of the workpiece. Therefore, the data storage unit 110 stores the pressure data detected from the pressure sensor 100b for each work material. The stored pressure data is considered standard data for the workpiece.

In addition, the data storage unit 110 may additionally store processing information necessary for processing for each processing material. For example, it may include cutting strength, processing shape, tool information to be processed, etc. according to the workpiece.

The comparator 130 compares the standard pressure data for each workpiece stored in the data storage 110 with the actual pressure data received from the A / D converter 120. The comparison method may compare whether the two pressure data coincide or whether the two pressure data do not coincide but fall within a fine error range.

The control unit 150 automatically sets the current position as the working origin when the actual pressure data and the pre-stored standard pressure data with the workpiece material match or are within a fine error range through the comparison in the comparator 130. On the contrary, if the actual pressure data and the pre-stored standard pressure data with the workpiece material are inconsistent or exceed the minute error range, the pressure is transmitted to the compensation unit 160 to perform compensation according to the pressure difference, and the compensated data is fed back.

Upon receiving the compensated data from the compensator 160, the controller 150 automatically sets the compensated data as the working origin.

The controller 150 transmits the automatically set home data to the driver 170 to control the turret 100 to move to the corresponding position. In addition, the controller 150 controls the driver 170 by using the processing information stored in the data storage 110 to perform processing on the workpiece.

The compensator 160 converts the distance by two pressure differences when the mismatch or the error range is exceeded through the comparison of the comparator 130, and compensates the converted distance to the work origin data.

The display unit 140 displays various types of information for automatically setting the work origin of the machine tool. For example, the comparator 130 may display a comparison result between the standard pressure data and the actual pressure data of the workpiece.

In addition, the automatic work origin setting apparatus according to an embodiment of the present invention may add a lamp, the lamp is notified through the comparison of the standard pressure data and the actual pressure data of the workpiece material within the match or minute error green It may be distinguished and flashed by red light, etc., informing of an error, inconsistency or a small error range.

The driver 170 drives the server motor 100a of the turret 100 according to a control command of the controller 150. Then, the server motor 100a transfers the tool to the position of the origin set according to the command of the driver 170. Accordingly, in the embodiment of the present invention, the work origin that varies depending on the irregular cross section of the workpiece is compared with the workpiece. It detects by the contact pressure and reflects the actual data according to the workpiece in real time.

Then, the above implementation method will be described.

2 is a flowchart illustrating a process of databaseting standard pressure information on a workpiece in a data storage unit according to an exemplary embodiment of the present invention.

First in step S100, the workpiece is fixed to the lathe.

In the next step S102, the turret equipped with the tool is transferred to the workpiece to be fixed to the lathe to measure the pressure of contact between the tool and the workpiece.

Pressure measurement, of course, uses a pressure sensor inside the turret. At this time, the portion for measuring the pressure in contact with the workpiece is measured by the surface contact using a planar member (that is, a tool) having a constant size, not a point contact. As described above, when the pressure is measured by the surface contact, the magnitude of the contact pressure varies depending on the size of the area where the workpiece is in contact with the tool even when the same force is applied. For example, in the case of an ideal workpiece, the cross section may be a flat surface in a straight line. In this case, the area where the workpiece is in contact with the tool is large and the magnitude of pressure is always constant. However, since the actual workpiece has an irregular cross section, the pressure varies depending on the contacting cross section, and the contact pressure is larger than the flat surface.

Therefore, step S102 may be regarded as a process for detecting a work origin that changes according to the actual cross section of the workpiece using pressure.

In addition, in the step S102, in the embodiment of the present invention can be measured for various positions of the workpiece in order to increase the accuracy of the standard pressure data. Figure 3 shows an example of measuring the contact pressure on the upper surface and the side of the workpiece. In other words,

The contact pressure is measured on the turret with constant force on the top and sides of the workpiece.

Next, in step S104, the measured pressure data is converted into digital data by the A / D converter.

Next, in step S106, the converted pressure data is stored in a data storage unit and made into a database.

If a pressure measurement is made at at least two positions for one workpiece, one average pressure data is calculated by calculating an average value, calculating a maximum value, or calculating a minimum value with respect to the pressure data measured at each position. Can be set.

4 is a flowchart illustrating a method of automatically setting a work origin of a machine tool according to an exemplary embodiment of the present invention, and FIG. 5 is a detailed flowchart of FIG. 4.

First, referring to FIG. 4, the workpiece is fixed to the lathe, and the turret having the tool is transferred to the workpiece that is fixed to the shelf to measure the contact pressure between the tool and the workpiece (S200 and S201).

Thereafter, the measured pressure data is converted into a digital value (S202).

Subsequently, the apparatus for automatically setting an operation origin of the present invention compares the converted pressure data with the standard pressure data previously stored in the data storage unit (S203).

In the comparison method, it is determined whether the converted pressure data and the standard pressure data pre-stored in the data storage unit match (S204).

As a result of the determination, if it matches, the automatic work origin setting apparatus of the present invention sets the current position as the work origin (S205), and if it does not match, compensation is performed (S207).

Compensation process is a step of calculating the difference between the converted pressure data and the standard pressure data pre-stored in the data storage unit as shown in FIG. 5 and converting the calculated pressure difference by the distance (S300), the converted distance origin Compensating the data to update the previous work origin (S301).

Thereafter, the automatic work origin setting apparatus of the present invention transmits a control signal corresponding to the set work origin to the driver to drive the servo motor (S206). Therefore, the turret can be transferred to the set work origin to increase the accuracy of machining despite the irregular cross section of the workpiece.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following detailed description, and the scope and meaning of the claims And all changes or modifications derived from the equivalent concept should be construed as being included in the scope of the present invention.

100: server motor 110: data storage unit
120: A / D conversion unit 130: comparator
140: display unit 150: control unit
160: compensation unit 170: driver

Claims (3)

In the method of setting the work origin in a machine tool,
Measuring, by the machine tool, the pressure in contact with the tool and the workpiece by transferring a turret equipped with the tool to a workpiece;
Importing standard pressure data of the workpiece from previously stored data with respect to the measured pressure data, and comparing the measured pressure data with the standard pressure data; And
As a result of the comparison, if the measured pressure data and the standard pressure data coincide with each other, setting the current position as the work origin, and if not, compensating for the difference between the measured pressure data and the standard pressure data to set the work origin.
Including,
The pre-stored data is matched with the standard pressure data according to the type of workpiece,
Measuring the pressure is a method for automatically setting the work origin of the machine tool, characterized in that for measuring the pressure contact between the tool and the workpiece for a plurality of surfaces of the workpiece. The method of claim 1,
The compensation is
Converting the pressure difference between the measured pressure data and the standard pressure data into a distance;
Updating the converted distance to reflect the previously set work origin
Automatic work origin setting method of the machine tool, characterized in that comprises a. In the apparatus for setting the work origin of the machine tool,
A pressure sensor mounted on the turret of the machine tool and detecting a pressure when the tool and the workpiece are contacted by the turret;
A data storage unit for storing standard pressure data in advance according to the type of the workpiece, and storing the data in a database;
A comparator comparing the actual pressure data sensed by the pressure sensing sensor with standard pressure data of the processed material pre-stored in the data storage unit to determine whether a match is obtained;
A compensator for converting a distance as a difference in pressure between the actual pressure data and the standard pressure data and compensating the converted distance to a previously set work origin when it is determined that the discrepancy is determined by the comparator; And
If the actual pressure data and the standard pressure data are matched through the comparator, the current position is set as the work origin, and if not, the compensator is commanded to perform a compensation corresponding to the difference between the actual pressure data and the standard pressure data. Control unit for receiving the received data from the compensation unit to set the work origin
Including,
The data storage unit is the pre-stored data is matched to the standard pressure data according to the type of workpiece,
The control unit automatically sets the working origin of the machine tool for measuring the contact pressure between the tool and the workpiece for a plurality of surfaces of the workpiece.
KR1020130008099A 2013-01-24 2013-01-24 Setting apparatus and method for work coordination of machine tool KR102030184B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130008099A KR102030184B1 (en) 2013-01-24 2013-01-24 Setting apparatus and method for work coordination of machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130008099A KR102030184B1 (en) 2013-01-24 2013-01-24 Setting apparatus and method for work coordination of machine tool

Publications (2)

Publication Number Publication Date
KR20140095650A KR20140095650A (en) 2014-08-04
KR102030184B1 true KR102030184B1 (en) 2019-10-10

Family

ID=51743926

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020130008099A KR102030184B1 (en) 2013-01-24 2013-01-24 Setting apparatus and method for work coordination of machine tool

Country Status (1)

Country Link
KR (1) KR102030184B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113219818A (en) * 2020-01-21 2021-08-06 上海铼钠克数控科技股份有限公司 Control method and device of numerical control machine tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006252432A (en) * 2005-03-14 2006-09-21 Jtekt Corp Nc machining device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05318283A (en) * 1992-05-25 1993-12-03 Fanuc Ltd Tool deflection correcting system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006252432A (en) * 2005-03-14 2006-09-21 Jtekt Corp Nc machining device

Also Published As

Publication number Publication date
KR20140095650A (en) 2014-08-04

Similar Documents

Publication Publication Date Title
US9370848B2 (en) Device for fastening screw onto workpiece and method of judging loosening of screw
JP4803491B2 (en) Position correction device for machine tool
TWI704028B (en) Tool path location compensation system based on offset of fixture
US20150261204A1 (en) Interface system of industrial machine
CN108287522B (en) Multi-platform-based automatic on-line detection method
CN109839075A (en) A kind of robot automatic measurement system and measurement method
KR101757855B1 (en) Robot with finger for weight measuring
KR101368048B1 (en) Tool die position compensation device of machine tools and method thereof
JP2017193043A (en) Position measurement method and position measurement system for object in machine tool
KR102030184B1 (en) Setting apparatus and method for work coordination of machine tool
KR20140085927A (en) Machining error calibration system and method
JP2017013177A (en) Screw fastening device
US20130205867A1 (en) Automatic rectifying system for machine tools
US20210291308A1 (en) Control mechanism, tool replacement equipment and tool replacement method
US20200139551A1 (en) Robot system
CN111113376A (en) Truss manipulator point fixing device and point fixing method thereof
US7444850B2 (en) Method and device for shaping workpieces
JP2017013175A (en) Screw fastening device
EP4012818A1 (en) Manufacturing control system and method
CN101344385B (en) Method for lossless detection of machine tool screw motion precision
JP2005028529A (en) Device for positioning industrial robot into its original position
US20230057196A1 (en) Thermal image auxiliary processing device, positioning device and method thereof
TWI757168B (en) Head measurement system for machining machine
KR100564026B1 (en) TOOL Auto Compensation Measure System And Method
KR101336398B1 (en) Tool Rest For CNC Lathe And Driving Method Thereof

Legal Events

Date Code Title Description
N231 Notification of change of applicant
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant