KR101257275B1 - Intelligent cnc machine tool with automatic processing function and control method thereof - Google Patents

Abstract

PURPOSE: An intelligent CNC(Computerized Numerical Control) machine tool with an automatic processing function and a control method thereof are provided to minimize the manual selection frequency and processing product quality errors of an operator and to improve the precision of a processing structure by regenerating NC(Numerical Control) data and searching a substitution tool when an error occurs due to the damage to the tool. CONSTITUTION: An intelligent CNC machine tool(10) with an automatic processing function and a control method thereof comprises a processing device(20), a control device(30), an arithmetic processing unit(40), an interface device(50). The processing device measures the coordinates and the size of a workpiece placed on a measuring sensor and sequentially cuts the workpiece with the tool selected by the NC data. The control device controls the driving of each tool and the signal of each part and includes a standard DB and a processing DB. The arithmetic processing unit sequentially extracts data from each DB of the control device and configures an optimum path. The interface device comprises a display unit, an input unit, and a radio wire communication unit. [Reference numerals] (20) Processing device; (30) Control device; (40) Arithmetic processing unit; (50) Interface device; (AA) Automatic tool changing device; (BB) Automatic workpiece supply device; (CC) Measuring device; (DD) Auxiliary control device; (EE) Reference DB; (FF) Processing DB; (GG) Processing automation device; (HH) Processing shape analysis; (II) Tool and material setting; (JJ) Processing type estimation; (KK) Tool moving path estimation; (LL) Processing path optimization; (MM) NC data generation; (NN) Optimum processing control; (OO) Spindle displacement correction; (PP) Thermal displacement correction; (QQ) Cutting transfer speed control; (RR) Outline control; (SS) Tool overload detection; (TT) Display unit; (UU) Input unit; (VV) Wire and wireless communication unit;

Description

Intelligent CNC machine tool with automatic processing function and its control method {INTELLIGENT CNC MACHINE TOOL WITH AUTOMATIC PROCESSING FUNCTION AND CONTROL METHOD THEREOF}

The present invention relates to an intelligent CNC machine tool having an automatic processing function and a control method thereof, and more particularly, when modeling information of a workpiece is input to the CNC machine tool, a machining sequence, a tool, and a movement path of the tool are automatically generated. The NC data is selected to generate NC data, and the workpiece is processed by the generated NC data, and the machining status is measured in real time and the correction is made immediately upon checking the error to maintain the optimal machining status. The present invention relates to an intelligent CNC machine tool having an automatic processing function and to a method of controlling the same.

In general, a machine tool is a generic name for a device that performs a variety of processing, and various types are known according to the processing range, and representatively, there is a CNC (Computerized Numerical Control) machine tool. When cutting the workpiece, the CNC machine tool automatically determines the cutting tool position or automatically cuts the program by directly connecting the program that records the numerical data indicating the machining dimension, the shape, the required tool, the feed speed, etc. directly with the computer. To do it.
Patent documents 1 to 4 are related to such a CNC machine tool.

Such a conventional method of driving a CNC machine tool is to perform a modeling operation (product modeling) for the product to be processed using a predetermined application program, and then design the mold of the product to be processed using the product modeling generated therein. Perform machining modeling. In addition, tooling is performed on a workpiece for producing a product by using the generated machining modeling information (data: a file, etc.). The processing operation is a very precise operation, the processing time is different depending on the type or size of the product, or the complexity of the product, in particular a very large time difference occurs depending on the skills of the skilled and unskilled. For example, the time difference between the inexperienced and the skilled person may vary by up to 6 to 10 hours or more when processing the same kind of product. Therefore, the skill level is an important variable that determines the production efficiency when machining a workpiece using a CNC machine tool. Was situated.

In recent years, in order to minimize the difference in product production efficiency according to the proficiency, available tool information according to the necessary work in the CNC machine tool and information such as the movement path of each tool are stored in a database. In this way, when the tool information is made into a DB, the operator inputs the machining modeling information into the CNC machine tool, sets the work order, and selects the tool required for each work order from the internal reference DB. It is automatically performed by the set machining data (NC data) according to each set work order, so that mass production is possible while minimizing the quality error.

However, even in such a method, since the operator must manually select a work order and / or a tool selection required for the work, the machining time may vary according to the operator's selection. That is, since the tool movement time difference is generated according to the work order and the tool selection, a difference may occur in the final yield during mass processing.

Therefore, there is a need for a study on a CNC machine tool having an automatic machining function and a control method thereof capable of improving the quality of a processed product while minimizing the frequency of manual selection of the worker to maintain a constant machining production speed.

1. Republic of Korea Patent Registration No. 0173298 2. Republic of Korea Patent Registration No.0407890 3. Korea Patent Registration No. 0256490 4. Republic of Korea Patent Registration No. 0454717

The intelligent CNC machine tool and the control method having an automatic machining function according to the present invention,

Analyze the input modeling data and automatically select the process to be processed and the tool used from the DB stored in the control device and optimize it to generate NC data.The machine automatically measures the size and coordinates of the supplied workpiece. By matching the coordinates of the workpiece with the coordinates of the NC data and processing the workpiece, the manual selection frequency and the workpiece quality error of the operator are minimized during the machining process, and in the case of an error due to tool damage, the replacement tool is searched and replaced at the same time. It aims to provide an intelligent CNC machine tool and its control method which improves the precision of workpiece processing by regenerating NC data according to the tool.

Intelligent CNC machine tool having an automatic machining function of the present invention for solving the above problems

In CNC machine tools that process workpieces, a number of tools, spindles, tables, spindles, turrets, and measuring sensors are installed to measure the coordinates and sizes of the workpieces placed in the measuring sensors, and the workpieces are selected by NC data. Processing apparatus for cutting and processing the sequentially; Control the driving of each device and the signal of each part of the processing device, the standard DB storing the characteristics (tool type, size, use, optimal use environment), tool movement path and various processing information of the tool mounted on the processing device, modeling A control device including a processing DB for storing the data processing order and NC data which is a tool movement path, and controlling driving of the processing device, and storing NC data reproduced with a tool replaced by a work error in the processing DB; The optimum path is sequentially set by extracting data from the reference DB or the processing DB of the control device, and the correction is performed by comparing the measured value of the measurement sensor installed in the processing part with the reference value, which is a tolerance for processing, An arithmetic processing unit for regenerating NC data according to the substitute tool information when a substitute solution for a job error is selected; A display unit for displaying the tool information of the processing device and information on the machining process and the error replacement solution, an input unit for inputting the selection and modeling data of the displayed content, and transmitting error information to the operator in case of a machining error Includes wired and wireless communication unit, and displays the standard and processing DB data information of the control device to be editable, send the processing status as a message to the operator, determine whether to replace in the case of a work error to be replaced by the replacement information And an interface device for instructing editing and updating of NC data.

In addition, the control method of the CNC machine tool,

An automatic control method of a CNC machine tool, comprising: supplying a workpiece to a processing apparatus, and automatically generating initial workpiece data for storing the coordinates and the workpiece size of the workpiece using a laser or touch measuring sensor and storing the workpiece into a controller; Receiving modeling data of a workpiece to be finished through an input unit of the interface device; Transmitting the received modeling data to a calculation processing device, wherein the calculation processing device analyzes a model size and shape of the modeling data; Comparing the analyzed data with the initial workpiece data to set tools and materials to be used for machining and selecting the corresponding tool from the reference DB of the control device; Calculating NC movement path of the selected tool and setting a machining order of the workpiece to generate NC data; An NC data optimization process of analyzing the generated NC data and optimizing by deleting unnecessary cutting paths, editing a processing sequence, and adjusting a moving speed and storing the NC data in a processing DB of a control device; The operator checking the optimized NC data on the display unit of the interface device and inputting a machining execution command through the input unit; A workpiece machining process that causes the workpiece machining to be performed in the machining apparatus based on the NC data order of the controller when the machining execution command is input; A sensor measurement process of measuring a real-time machining state with a sensor installed in a processing device during a workpiece processing and transmitting the sensor measurement value to a control device; It is characterized in that it comprises a real-time processing optimum control process to complete the processing by maintaining the optimum processing state by correcting the processing within the allowable range in comparison with the transmitted sensor measured value and the reference characteristics or tool characteristics of the reference DB.

Intelligent CNC machine tool and the control method having an automatic machining function of the present invention by the above solving means,

Analyze the input modeling data and automatically select the process to be processed and the tool used from the DB stored in the control device and optimize it to generate NC data.The CNC machine tool processing machine provides the size and coordinate of the supplied workpiece. By automatically measuring the coordinates of the workpiece and the coordinates of the NC data, and then machining the workpiece, thereby minimizing the production difference according to the skill of the operator by automating the machining process and at the same time correcting various machining errors in the machining process. As a result, the quality of the workpiece can be improved.

In addition, it automatically searches for a replaceable tool when an error such as a tool breakage occurs, updates NC data based on the tool selected by the search, and sends a message to the operator about the reason for stopping or stopping the work if there is no alternative. It is now possible to provide useful devices and methods that provide prompt action, such as finding solutions.

1 is an overall configuration diagram of an intelligent CNC machine tool according to an embodiment of the present invention.
Figure 2 is a block diagram showing a control process of the intelligent CNC machine tool according to an embodiment of the present invention.
3 is a block diagram showing a control process when an error occurs in an intelligent CNC machine tool according to an embodiment of the present invention.
4 is a workflow of an intelligent CNC machine tool according to an embodiment of the present invention.

Hereinafter, with reference to the drawings will be described in detail an intelligent CNC machine tool having an automatic machining function and a control method thereof.

1 is an overall configuration diagram of an intelligent CNC machine tool according to an embodiment of the present invention, Figure 2 is a block diagram showing a control process of the intelligent CNC machine tool according to an embodiment of the present invention, Figure 3 is 4 is a block diagram illustrating a control process when an error occurs in an intelligent CNC machine tool according to an embodiment, and FIG. 4 is a flowchart of an operation of an intelligent CNC machine tool according to an embodiment of the present invention.

As described, the CNC machine tool 10 of the present invention includes a processing device 20, a control device 30, a calculation processing device 40, and an interface device 50.

The processing apparatus 20 measures the coordinates and the size of the workpiece placed with a plurality of tools, spindles, tables, spindle, turret, measuring sensor is installed by measuring sensors, the workpiece is sequentially selected by the tool selected by the NC data It is a device for cutting and processing. Such a processing device is a general machine tool including a working space for placing a workpiece therein and including a coolant supply means for preventing overheating of the tool and smoothing the cutting surface, and interlocked with a control device to facilitate control. Auxiliary control device may be further provided, and the tool automatic change device which is applied to some machine tools, the automatic workpiece supply device, and the measuring device having a sensor that can move axially or uniaxially with the LM guide may be included. .

The control device 30 controls the driving of each device and the signal of each part of the processing device, the characteristics of the tool (tool type, size, use, optimal use environment), tool movement path and various processing information of the tool mounted on the processing device. It includes a reference DB stored in the database, and a processing DB stored in the NC data, which is the processing sequence of the modeling data and the tool movement path, the driving control of the processing equipment is performed, and the NC data regenerated based on the tool replaced by the work error. Save to the processing DB. The reference DB stores a variety of basic characteristics of the tool, such as tool information required for the processing type, position displacement amount information of the tool according to various temperatures, and axial displacement amount information of the tool according to the rotational speed of the spindle. In addition, the machining DB may be used for temporary storage, such as the initial workpiece data of the workpiece supplied to the processing apparatus in addition to the NC data. Here, the reference DB and the processing DB may be a storage device configured separately from the control unit, but the present invention will be described as one execution group.

Next, the arithmetic processing unit 40 extracts data from the reference DB or the processing DB of the control device and sequentially sets the optimum path, and measures the measured value of the measuring sensor installed in the processing unit and the reference value which is the processing tolerance. In order to prepare for the difference, the correction is made. When the alternative solution to the work error is selected, the NC data according to the alternative tool information is regenerated to be updated to the machining DB. The arithmetic processing apparatus may be an independent object provided with a CPU, a RAM, and a ROM for arithmetic processing, and may be provided in a form formed integrally with the control apparatus.

In addition, the interface device 50 is a device that provides a variety of device information to the operator, receives the selection, and is a device that can be notified in real time of the work process by sending a message to the specified contact information. The intelligent interface device includes a display unit for displaying tool information of a processing device, information in a machining process, and a solution for error replacement, an input unit for inputting selection and modeling data of the displayed contents, work process information, or machine processing. It comprises a wired and wireless communication unit for transmitting a message to the operator of the error information in the event of an error. The display unit may sequentially display the processing sequence that is automatically set by various methods such as a conversation method and a flow method (hereinafter, the program may be referred to as 'HMI; Human Machine Interface'). The edited contents can be edited by inputting various execution commands such as selection, pass, and change, and the process is connected by bidirectional communication with the control unit and the processing unit. In addition, the display panel may be configured as a touch panel to enable screen flip, return, and selection input.

The interface device configured as above displays the standard and processing DB data information of the control device so that the operator can edit it manually, send the processing status as a message to the worker, determine whether to replace it in case of a work error, and make a replacement. Instructs the NC data to be edited and updated according to the information. These various states can be made after receiving the operator's confirmation signal, the progress is made, or the replaceable error can be selectively made by the setting state, such as to proceed to the processing by itself.

2 and 4, the automatic control method of the intelligent CNC machine tool configured as described above is performed with the initial workpiece data automatic generation process.

Before the above process, when the power of the machine tool is turned on, the processing device and the control device are in a ready state, and the HMI, which is a program stored in the basic DB of the control device, is executed and displayed on the display unit of the interface device.

When the workpiece is supplied into the processing apparatus by the automatic feeding device in the preparation of the machine tool, the coordinates and the size of the workpiece are measured by using a measuring sensor such as a laser or a touch type measuring sensor, and the processing DB of the control device or a separate Save to DB.

At this time, by determining the volume of the workpiece and by setting the machining rotation center, it is possible to efficiently process the workpiece during lathe work, which is machining by rotation.

In this way, the process of extracting the initial workpiece data for the workpiece may be changed after the analysis of modeling data to be described later.

Next, a process of receiving modeling data of the workpiece to be processed through the input unit of the interface device is performed.

The modeling data is a process of inputting information such as shape figures of a model to be processed by various formats such as a CAD file and a 3D image file.

The input of the modeling data may be input by a conventional input method such as a USB, a personal computer, an internet network, a wireless network, and the modeling data input through the input unit may be stored in a processing DB to perform other processes. .

In addition, when connecting to the input unit for inputting the modeling data, the basic information such as the file name is displayed on the display unit so that the operator can check the modeling data and then input the correct data.

The received modeling data is performed to analyze the size and shape of the model.

The modeling data input from the input unit of the interface device may be directly transmitted to the arithmetic processing unit to perform the processing, or may be stored in the processing DB and extracted thereafter to be processed in the arithmetic processing unit as described above. This process may include the process of arranging the types of machining according to the shape of the model. For example, in order to form a female thread on the surface, a processing type such as a drill, boring, and female thread cutting may be selected.

When the analysis of the modeling data is completed, a process of selecting a tool for machining is performed.

In this process, by analyzing the modeling data input from the processing unit and the initial workpiece data stored in the machining DB to compare and set the tools and materials to be used in the machining, select the tool from the reference DB of the control device It is a process.

The comparison of the two data is to match the machining center in the modeling data and the machining center of the initial workpiece data so that the machining is performed on the entire surface of the workpiece without deflecting to one side during side processing.

In this process, by inputting the material of the workpiece, information such as cutting speed and cutting depth for the tool used can be extracted from the reference DB to prepare information that can be optimally processed.

The process of collecting the information and generating NC data is performed.

In this process, the order of the machining types selected in the previous process is determined so that efficient processing is performed, and NC data is generated by setting the movement path calculation and the driving conditions of each device.

Here, the processing order is to arrange the processing order according to the standardized storage order, and to determine the processing priority of the processing step set in the present invention based on the data standardized in the processing step according to the processing type.

For example, in the case of a process in which the diameter of the middle portion of the cylinder is reduced to form a mortar shape, and the female screw hole is formed in the surface having the reduced diameter, the surface processing and the female screw hole processing of the workpiece are performed. By ranking, female thread hole processing is performed after surface processing. In addition, the female thread hole processing is also performed in the order of drill processing, boring, female thread cutting, etc. so that the female thread hole processing can be made quickly.

In order to perform this process, the movement paths of the tools such as the drill bit used in each process are arranged in sequence so as not to overlap each other so as to be processed.

Next, a process of optimizing the generated NC data is performed.

In this process, the NC data generated in the previous process is analyzed and optimized by deleting unnecessary processing paths (tool movement paths), editing the processing sequence, and adjusting the moving speed, and storing them in the processing DB of the controller.

For example, in the case of the process of reducing the diameter of the intermediate part of the workpiece cylinder to form a mortar shape, and forming the female screw hole in the surface having the reduced diameter, the surface processing and the female screw hole processing of the workpiece are performed.

Here, the movement of the tool during the female thread hole processing is to be processed from the outer surface of the workpiece to the target depth before the machining, but the position of the outer surface of the workpiece is changed by the previous surface processing to remove the process of finding the position quickly surface It is a process of shortening the tool movement path so that female threaded holes can be machined from the machined surface.

In addition, by displaying the information of the generated NC data by the display unit, it is possible for the operator to check the machining process of the NC data and to arbitrarily change the work order through the input device. In addition, the display panel may be configured as a touch panel so that the screen can be flipped back or inputted by a touch.

In addition, by adjusting the moving speed of the tool to be cut or the rotational speed of the workpiece, roughing and finishing can be performed according to the cutting amount (thickness) in the workpiece surface processing.

The operator checks the optimized NC data on the display unit and inputs a machining execution command through the input unit.

The display unit displays the optimized NC data and recognizes the working process to the operator. When the operator inputs a machining execution command, the control unit loads the optimized NC data from the machining DB and transmits each control signal to the processing apparatus. Allow tool setting and workpiece machining to be performed at

Here, the tool setting of the processing apparatus may be automatically performed by the optimized NC data before inputting the machining execution command, so that the operator may confirm the completion of the tool setting and then input the machining execution command.

In the workpiece machining process, a sensor measurement process of measuring a real-time machining state with a sensor installed in a processing device and transmitting the sensor measurement value to a control device is performed.

Sensors installed in the processing apparatus may be equipped with a variety of sensors, such as a speed measuring sensor, a temperature sensor, the speed measuring sensor is to measure the spindle to measure the real-time rotational speed of the spindle as a control device The temperature sensor controls the real-time temperature sensor measurement values for various positions in the processing apparatus, for example, rails, spindles, and tables, in which the main shaft is slid, to change the position of the workpiece and the tool, by varying the position of the workpiece and the tool. To the device. In addition, laser irradiation can be used to detect changes in comparison with previously measured values.

Next, a process of real-time processing optimal control is performed to check and maintain the processing state through the measured values of the sensor.

The sensor measurement value received from the processing device is corrected in real time within the allowable range if the measured value is out of the allowable range of the reference value compared to the tool characteristic or the reference value of the reference DB to maintain the optimum processing state. Here, the reference value is a value that sets the allowable error range in machining, such as allowable machining speed, allowable machining temperature, and allowable displacement, by tool-specific characteristics.

In the real-time machining optimization control process, any one of a spindle displacement compensation step, a thermal displacement compensation step, a cutting feed rate control step, and a contour control step may be selectively performed.

The spindle displacement correction step is a step of correcting the tool position by extracting the sensor measurement value measuring the spindle rotational speed and the axial displacement of the tool according to the measured rotational speed from the reference DB. In general, the spindle is formed as a hollow portion and a tapered portion is formed at one end of the inner circumferential surface so that the tool is seated, and the tool is pulled in the axial direction (Z axis) through the hollow portion of the spindle to prevent detachment. When the spindle rotates at a high speed, the tapered portion expands. At this time, the tool is further introduced into the extended tapered portion by the axial pulling force, thereby generating a machining error in the axial direction. Since the movement of the tool is varied according to the rotational speed of the spindle, the tool changes the position of the tool according to the rotational speed of the spindle into a DB and stores the position of the tool by the displacement corresponding to the rotational speed which is a sensor measurement value of the spindle. Change to minimize processing errors. The calculation of the displacement amount of the tool according to the rotation is described in detail by the patent application No. 10-2004-0023552 filed by the present applicant, the present invention is corrected by incorporating the tool position change amount calculated by a known calculation method To be done.

Next, the thermal displacement correction step extracts a correction displacement value by comparing a sensor measurement value measuring a temperature in the processing device with a reference DB stored in the displacement amount of the internal component according to the temperature change and corrects the tool position by the extracted displacement. Step. In the processing apparatus, frictional heat is generated on the sliding surface of the table or the headstock where the conveying is performed, and frictional heat is also generated by the rotation of the spindle. The heat generated by these various factors causes a slight deformation of the sliding surface or the spindle, resulting in machining errors. Therefore, by mounting the temperature sensor to the main part that can change the angle of the tool by the heat to measure the temperature in real time to extract the correction displacement according to the corresponding temperature from the reference DB to correct the tool position or cool the heated part It is possible to minimize the occurrence of machining errors. The calculation of the displacement amount according to the temperature is described in detail by the patent application No. 10-2004-0023551 filed by the present applicant, the present invention is based on the DB of the correction displacement according to the temperature calculated by the known method of calculation By storing it in the DB, the correction displacement is quickly extracted from it, so that correction can be made.

In addition, the cutting feed rate control step is to control the feed rate of the tool in real time to maintain a constant cutting load transmitted to the tool during complex shape processing, thereby preventing the tool breakage due to the rapid increase in cutting load.

In addition, the contour control step is to reduce the machining time while maintaining the machining precision by increasing or decreasing the machining speed according to the importance of the cutting position. At this time, the processing speed can be subdivided into 50 or more steps to be processed by various selection.

In addition, by detecting the fine movement of the cutting tool to detect the overload of the tool to reduce the wear of the tool, to prevent damage due to overload and replacement of the tool can be prevented to prevent machining defects. The minute movement may be detected by detecting a current amount of the tool to check a change in the amount of current, or may be sensed as a change in pressure by a pressure sensor.

By the optimal control process, the workpiece produces a product by minimizing the machining error, and when the machining is completed, the alarm is sounded together with the completion indication on the display unit to promptly notify the worker.

3 and 4, in the workpiece machining process and the real-time machining optimum control process, an error alarm generation step of immediately generating an alarm when the machining error due to tool breakage and stopping the machining is performed. That is, in the error alarm generation step, when abnormal machining due to tool breakage or other factors is detected during roughing, finishing, cutting, etc., the machining operation is stopped and an alarm is generated to notify an error occurrence. The alarm may be indicated by light emission of an alarm sound and / or a warning light of a speaker installed at one side of the machine tool.

Next, in case of a tool breakdown, the tool selection step of searching for and selecting a substitute tool from the reference DB is performed. In general, errors caused by tool error displacement due to spindle rotation speed and tool position change due to temperature change can be corrected through the spindle displacement compensation step and the thermal displacement compensation step as described above, so that the machining can be continued. . However, in the case of an error due to a tool breakage, it is not solved by the correction, so the broken tool must be changed to another tool. Therefore, the tool replacement of the processing apparatus can be automatically performed by searching for and selecting a replacement tool that can replace the damaged tool by searching the reference DB of the control apparatus storing the information of the initial processing apparatus.

When the replacement tool is selected, the step of updating the NC data by the machining using the replacement tool is performed. That is, when the alternative tool is selected, the entire machining information using the broken tool is deleted from the optimized NC data stored in the existing machining DB, and the tool is updated with the movement path and the machining sequence of the tool by the replacement tool.

When the update of the NC data is completed, the reprocessing step of the workpiece is performed. In this step, the workpiece machining is performed by the updated NC data from the point where the error occurred.

On the other hand, if there is no tool to replace in the reference DB search in the case of a tool break error, a message transmission step of delivering a text message to the operator is stopped by performing the machining. After receiving the message, the operator checks the error information and then takes necessary measures, for example, in the case of a tool break, to manually replace and mount the tool. Of course, when the tool is replaced, the information about the tool is input to the basic DB, the step of selecting the replaced tool, the NC data update step by the tool change, etc. are performed, and then reprocessing is performed.

The message transmission step may enable the operator to check the work progress of the machine tool by transmitting the real time machining state periodically in addition to notifying the machining stop state. In addition, when a selection situation occurs in the course of the work can be sent to receive a response from the operator to be selected. Two-way communication such as message (text) transmission and reply reception from the operator is performed through the wired / wireless communication unit of the interface device, and the selection information according to the message reply is the same as the input information through the input unit and the information by the touch of the display unit. It is determined that information processing is performed.

In addition, the workpiece manufactured by performing the optimal control process in real time through normal machining or rework by error is further performed to determine whether the machining suitability.

In the process suitability determination process, when the processing of the workpiece is completed in the processing device, the size of the finished workpiece is measured by using a measuring sensor, and the measured information is compared with the modeling data received in the input process, and whether the numerical value is within the error range. This is the final inspection process to determine if it is out of range.

The above-described examples are merely examples for easily explaining the content and scope of the technical idea of the present invention, and thus the technical scope of the present invention is not limited or changed. In addition, it will be apparent to those skilled in the art that various modifications and changes can be made within the scope of the present invention based on these examples.

10: Intelligent CNC Machine Tool
20: processing equipment
30: control device
40: operation processing device
50: interface device

Claims (6)

A processing apparatus in which a plurality of tools, spindles, tables, spindles, turrets, and measuring sensors are used for processing the workpieces placed therein; A reference DB for controlling the driving of each device and signals of each part of the processing device, and storing the characteristics of the tool (tool type, size, use, and optimum use environment), tool movement path, and various processing information of the tool mounted on the processing device; A control device including a machining DB for storing the machining sequence of the modeling data and the NC data which is a tool movement path; An arithmetic processing device which extracts data of each DB of the control device and sequentially sets an optimum path and corrects the difference by comparing the measured value and the reference value of the measuring sensor installed in the processing device; An interface device including a display unit for displaying a variety of information, an input unit for inputting modeling data and options, and a wired / wireless communication unit for transmitting a message to the operator with various information and error information; In the method,
Supplying the workpiece to the processing apparatus, and automatically generating initial workpiece data for measuring the coordinates of the workpiece and the size of the workpiece using a laser or touch measuring sensor and storing them in the control apparatus;
Receiving modeling data of a workpiece to be finished through an input unit of the interface device;
Transmitting the received modeling data to a calculation processing device, wherein the calculation processing device analyzes a model size and shape of the modeling data;
Comparing the analyzed data with the initial workpiece data to set tools and materials to be used for machining and selecting the corresponding tool from the reference DB of the control device;
Calculating NC movement path of the selected tool and setting a machining order of the workpiece to generate NC data;
An NC data optimization process of analyzing the generated NC data and optimizing by deleting unnecessary cutting paths, editing a processing sequence, and adjusting a moving speed and storing the NC data in a processing DB of a control device;
The operator checking the optimized NC data on the display unit of the interface device and inputting a machining execution command through the input unit;
A workpiece machining process that causes the workpiece machining to be performed in the machining apparatus based on the NC data order of the controller when the machining execution command is input;
A sensor measurement process of measuring a real-time machining state with a sensor installed in a processing device during a workpiece processing and transmitting the sensor measurement value to a control device;
The real-time processing optimal control process to complete the processing by maintaining the optimum processing state by correcting the processing within the allowable range in comparison with the transmitted sensor measurement value and the reference characteristics or tool characteristics of the reference DB; Automatic control method of CNC machine tool. The method of claim 1,
In the real-time processing optimal control process
A spindle displacement correction step of correcting the tool position by the extracted displacement by extracting a sensor measurement value measuring a spindle rotation speed and an axial displacement of the tool according to the measured rotation speed from a reference DB;
A thermal displacement correction step of extracting a correction displacement value by comparing the sensor measurement value measuring the temperature in the processing device with a reference DB stored in the displacement amount of the internal component according to the temperature change and correcting the tool position by the extracted displacement;
A cutting feed rate control step of controlling a feed rate of a tool in real time when a complicated shape is processed to maintain a constant cutting load;
Contour control step of reducing the machining time while maintaining the machining precision by increasing the machining speed according to the importance of the cutting position; Automatic control method of an intelligent CNC machine tool, characterized in that any one step is made selectively. The method of claim 1,
In the workpiece machining process and real-time machining optimum control process
An error alarm generation step of immediately generating an alarm and stopping the machining in the case of a machining error due to tool breakage;
A replacement tool selection step of selecting a replacement tool for the generated error from the reference DB;
NC data updating step of deleting the entire machining information of the broken tool from the existing optimized NC data, and updates the tool movement path and the machining sequence by the replacement tool;
Re-machining step of restarting the machining of the workpiece from the time when the error occurs by the updated NC data; automatic control method of an intelligent CNC machine tool. The method of claim 3,
If there is no tool to be replaced in the alternative tool selection step, the automatic control method of the intelligent CNC machine tool, characterized in that a message transmission step of notifying the processing stop state by delivering a text message to the operator to stop the processing. The method of claim 1,
If the machining of the workpiece is completed in the real-time machining optimal control process, measuring the size of the finished workpiece using a measuring sensor, and comparing the measured data with the modeling data received in the input process to determine whether the machining suitability Judgment process; The automatic control method of the intelligent CNC machine tool, characterized in that is further performed. In CNC machine tools for processing workpieces,
Machining apparatus that measures the coordinates and size of the workpiece placed by the measuring sensor with a plurality of tools, spindles, tables, spindle, turret, and measuring sensor, and sequentially cuts and processes the workpiece with the tool selected by NC data. 20);
Control the driving of each device and the signal of each part of the processing device, the standard DB storing the characteristics (tool type, size, use, optimal use environment), tool movement path and various processing information of the tool mounted on the processing device, modeling The control device includes a machining DB that stores the machining sequence of data and NC data which is a tool movement path, and the driving control of the machining device is performed, and the NC data reproduced by the tool replaced by the work error is stored in the machining DB (30). )Wow;
The optimum path is sequentially set by extracting data from the reference DB or the processing DB of the control device, and the correction is performed by comparing the measured value of the measurement sensor installed in the processing part with the reference value, which is a tolerance for processing, An arithmetic processing unit 40 for regenerating NC data according to the substitute tool information when a substitute solution for a job error is selected;
A display unit for displaying the tool information of the processing device and information on the machining process and the error replacement solution, an input unit for inputting the selection and modeling data of the displayed content, and transmitting error information to the operator in case of a machining error Includes wired and wireless communication unit, and displays the standard and processing DB data information of the control device to be editable, send the processing status as a message to the operator, determine whether to replace in the case of a work error to be replaced by the replacement information Intelligent CNC machine tool, characterized in that comprises a; interface device 50 for instructing the editing and updating of the NC data.

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