KR20220141546A - Automatic tool changer breakage preventing control device of machine tool and method thereof - Google Patents

Abstract

An automatic tool changer (ATC) damage prevention control device for machine tools according to the present invention includes: a spindle to clamp or unclamp a tool; an ATC having an arm and automatically exchanging the tool mounted on the spindle with another tool; a detection unit installed on one side of the spindle to detect whether tool unclamping or tool clamping of the spindle occurs when a tool exchange signal is generated; and a control unit for controlling the tool exchange or emergency stop operation of the ATC in real-time by analyzing whether or not the tool unclamping of the spindle is normally operated according to the detection result of the detection unit while the ATC is operating by the tool exchange signal, thereby capable of preventing damage or breakage of the ATC and tools.

Description

ATC breakage preventing control device and control method of a machine tool TECHNICAL FIELD

The present invention relates to an ATC damage prevention control device and control method of a machine tool, and more particularly, by analyzing the normal operation of tool unclamping of the spindle according to the detection result of the sensing unit during ATC operation by a tool change signal, the ATC tool It relates to an ATC damage prevention control device and control method of a machine tool that can prevent damage or damage to ATC by controlling the operation of ATC to continuously perform replacement or to immediately stop and generate an alarm.

In general, a machine tool refers to a machine used for the purpose of machining a metal/non-metal workpiece into a desired shape and size using an appropriate tool by various cutting or non-cutting methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door machining centers, Swiss turns, electric discharge machines, horizontal NC boring machines, CNC lathes, etc., are widely used in various industrial sites for their respective purposes.

In general, various types of machine tools currently used have an operation panel to which a numerical control (NC) or computerized numerical control (CNC) technology is applied. Such an operation panel is provided with various function switches or buttons and a monitor.

In addition, the machine tool is a table on which a workpiece material is seated and transferred for processing the workpiece, a pallet for preparing the workpiece before processing, a spindle that rotates with a tool or workpiece combined, a tailstock for supporting the workpiece, etc. during processing, a vibration isolator etc. are provided.

In general, in a machine tool, a table, a tool rest, a main shaft, a tailstock, a vibration isolator, etc. are provided with a conveying unit conveying along a conveying axis in order to perform various machining.

In addition, in general, a machine tool uses a plurality of tools for various processing, and a tool magazine or a turret is used as a tool storage place for storing and storing a plurality of tools.

Such a machine tool uses a plurality of tools for various processing, and a tool magazine is used in the form of a tool storage place storing a plurality of tools.

In addition, in general, a machine tool is provided with an automatic pallet changer (APC, Automatic Palette Changer) in order to minimize the non-working time. The automatic pallet changer (APC) automatically exchanges pallets between the workpiece machining area and the workpiece installation area. Pallets may be loaded with workpieces.

In general, machine tools are largely classified into turning centers and machining centers according to processing methods. In general, the turning center rotates the workpiece, and the machining center performs the machining of the workpiece while the tool rotates.

In general, a turning center refers to a machine tool that is equipped with an automatic tool changer, etc. and performs various processing by exchanging various types of tools. It is divided into a horizontal turning center.

Generally, a machining center refers to a machine tool equipped with an automatic tool changing device, etc., and performing a wide range of machining that can be performed on lathes, milling, drilling, boring machines, etc. by exchanging various types of tools. It is divided into a vertical machining center and a horizontal machining center in which the main shaft is mounted vertically.

These turning centers and machining centers may be equipped with a large-capacity magazine that stores a lot more tools than a general magazine in order to perform various machining quickly and effectively.

In addition, in general, a machine tool is provided with an automatic tool changer (ATC, Automatic Tool Changer) for withdrawing or receiving a specific tool from the tool magazine by the command of the numerical control unit in order to improve the productivity of the machine tool.

In general, a spindle includes a spindle cylinder for clamping or unclamping the tool inside the spindle, and clamps or unclamps the tool through a rotational operation of the spindle cylinder. In addition, the ATC has an arm, and the ATC arm is driven by a servomotor in a cam method.

The ATC arm rotates in a very short time with one rotation time of approximately 1 second, and quickly exchanges the tool mounted on the spindle and the tool to be exchanged. That is, the automatic tool changer (ATC) rotates as fast as possible to reduce non-working time and performs tool change. As such, the ATC performs tool change while rotating in the state that the ATC arm is out for tool exchange.

However, in the conventional machine tool, even if the spindle cylinder operates late or malfunctions due to a drop in oil temperature or pressure while the arm of the ATC is out by the tool change signal, the ATC or the tool is damaged or damaged as the tool exchange continues. There was a problem being

In addition, in the conventional machine tool, although the ATC needs to exchange the tool while the spindle is in the unclamped state of the tool, it is separately determined and the control through synchronization with the ATC cannot be performed. There was a problem in that safety accidents occurred due to collisions, etc.

Moreover, conventional machine tools cannot accurately and quickly determine whether or not the tool is unclamped on the spindle as the ATC operates at a fast time of 1 second during one display, resulting in tool damage or ATC damage, increasing maintenance costs and time, As the non-working time increases, productivity decreases, the reliability and stability of machine tools are impaired, and there are problems that cause consumer dissatisfaction.

Republic of Korea Utility Model Registration Publication No. 20-0242515 Republic of Korea Utility Model Registration Publication No. 20-0159641

The present invention is to solve the above problems, and an object of the present invention is to analyze the detection result of the sensing unit in real time while the arm is drawn out by the ATC operation by the tool change signal so that the spindle is currently in the tool unclamped state. In this case, ATC tool change is continued, and if the spindle is in the current tool clamp state, ATC tool change is stopped immediately and ATC operation is controlled in real time to generate an alarm. Alternatively, it is to provide an ATC damage prevention control device and control method of a machine tool that can prevent breakage or damage of the tool, reduce maintenance costs and time, and improve productivity of the machine tool according to a reduction in non-working time.

In addition, another object of the present invention is to accurately determine whether the spindle is currently in the tool unclamped state or the tool clamped state during tool change in a very short time of about 1 second by ATC, and to quickly perform continuous tool change or emergency stop of the ATC. to improve the stability and reliability of the machine tool by accurately determining the It is to provide an ATC damage prevention control device and control method of a machine tool that can prevent safety accidents in advance.

In order to achieve the object of the present invention, the ATC damage prevention control device of the machine tool according to the present invention includes a spindle for clamping or unclamping the tool; ATC having an arm and automatically exchanging a tool mounted on the spindle with another tool; a sensing unit installed on one side of the spindle to detect whether the spindle is unclamped or clamped when a tool change signal is generated; and a control unit for real-time control of tool exchange or emergency stop operation of the ATC by analyzing whether or not the tool unclamping of the spindle is normally operated according to the detection result of the sensing unit during operation of the ATC by the tool change signal. have.

In addition, in a preferred embodiment of the ATC damage prevention control device of the machine tool according to the present invention, the control unit of the ATC damage prevention control device of the machine tool is the detection unit in the state in which the arm part of the ATC is withdrawn by the tool exchange signal. By analyzing the detection result in real time, if the spindle is currently in the tool unclamped state, the ATC tool change is continued. If the spindle is in the current tool clamped state, the ATC tool change is immediately stopped and an alarm can do it

In addition, in a preferred embodiment of the ATC damage prevention control device of the machine tool according to the present invention, the control unit of the ATC damage prevention control device of the machine tool according to the detection result of the detection unit during the operation of the ATC by a tool exchange signal a memory unit for storing data for real-time control of tool exchange or emergency stop operation of the ATC by analyzing whether or not the tool unclamping of the spindle is normally operated; an analysis unit that analyzes the data stored in the memory unit and the detection result of the sensing unit, and determines whether the tool replacement of the ATC continues or an emergency stop of the ATC and an alarm occur while the arm unit is withdrawn; and a processing unit configured to output a signal for generating an alarm after continuously performing tool replacement of the ATC or emergency stop of the ATC according to the analysis result of the analysis unit.

In addition, in a preferred embodiment of the ATC damage prevention control device of the machine tool according to the present invention, the memory unit of the control unit of the ATC damage prevention control device of the machine tool basic data storage for storing data about the spindle, ATC, machining program wealth; a tool data storage unit for storing data on the weight of the tool; a position data storage unit for storing position data on a tool clamp position and a tool unclamp position of the spindle according to the weight of the tool stored in the tool data storage unit; and a detection data storage unit configured to store current tool unclamp detection data of the spindle and tool clamp detection data of the spindle according to the detection result of the detection unit.

In addition, in a preferred embodiment of the ATC damage prevention control device of the machine tool according to the present invention, the analysis unit of the ATC damage prevention control device of the machine tool determines whether or not a tool exchange signal is generated and the data stored in the tool data storage unit. a confirmation unit for confirming the weight of the tool currently clamped on the spindle and the weight of the tool to be exchanged by the ATC; a comparison unit for comparing the tool unclamping position data of the spindle with the tool unclamping detection data of the spindle according to the result of the confirmation of the confirmation unit, the position data storage unit, and the data stored in the detection data storage unit; and a determination unit configured to determine whether a difference between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle occurs according to the verification result of the verification unit and the comparison result of the comparison unit.

In addition, in a preferred embodiment of the ATC anti-breakage control apparatus for a machine tool according to the present invention, the control unit of the ATC anti-breakage control apparatus of the machine tool may control the ATC according to whether or not the tool unclamping of the spindle is normally operated during the ATC operation. a selection unit that selects whether to change the tool or emergency stop operation; and a display unit displaying results of the memory unit, the analysis unit, the processing unit, and the selection unit.

In addition, in a preferred embodiment of the ATC damage prevention control device of the machine tool according to the present invention, the sensing unit of the ATC damage prevention control device of the machine tool may be formed of a contact displacement sensor or a proximity sensor.

In order to achieve another object of the present invention, the ATC damage prevention control method of a machine tool according to the present invention analyzes whether or not the tool unclamping of the spindle is in normal operation according to the detection result of the sensing unit during the operation of the ATC by the tool change signal. storing data for controlling the tool change or emergency stop operation of the ATC in real time; selecting whether to activate the tool exchange emergency stop operation function of the ATC by analyzing in real time whether the tool unclamping of the spindle is normally operated during the ATC operation; confirming the weight of the tool currently clamped to the spindle and the weight of the tool to be exchanged by the ATC according to the presence or absence of a tool change signal and pre-stored tool data; detecting whether the spindle is tool unclamped or tool clamped according to the check result; comparing the tool unclamp position data of the spindle with the tool unclamp detection data of the spindle based on the confirmation result, the detection result, and the pre-stored data; determining whether there is a difference between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle according to the confirmation result and the comparison result; and when a difference occurs between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle in a state in which the ATC is operated by the tool change signal according to the determination result and the arm portion of the ATC is drawn out, the spindle In this current tool clamp state, the ATC is emergency stop and an alarm is generated at the same time, and when the difference between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle does not occur, the tool exchange of the ATC is performed. It may include; outputting a signal to be continuously performed.

The ATC damage prevention control apparatus and control method for a machine tool according to the present invention analyzes the detection result of the sensing unit in real time in a state in which the arm is drawn out by the ATC operation by the tool change signal, and when the spindle is currently in the tool unclamping state, ATC tool change is continued, and if the spindle is currently in tool clamp state, ATC tool change is immediately stopped and ATC operation is controlled in real time to generate an alarm. It has the effect of preventing breakage or damage to the ATC or the tool.

In addition, the ATC damage prevention control apparatus and control method of a machine tool according to the present invention prevents damage or breakage of the ATC or the tool during tool replacement, thereby reducing the maintenance cost and time of the machine tool, and reducing the non-working time of the machine tool has the effect of improving the productivity of

Furthermore, the ATC damage prevention control apparatus and control method of a machine tool according to the present invention accurately determine whether the spindle is currently in the tool unclamped state or the tool clamped state during tool change in a very short time of about 1 second, and the ATC continuous tool It has the effect of maximizing the stability and reliability of the machine tool by quickly and accurately determining replacement or emergency stop.

In addition, the ATC damage prevention control apparatus and control method of a machine tool according to the present invention control whether an immediate ATC emergency stop or tool replacement is continued with only a sensing unit and a control unit, thereby reducing manufacturing costs and reducing the size of equipment, It promotes the convenience of workers and has the effect of preventing safety accidents in advance.

1 shows a conceptual diagram of an ATC damage prevention control device of a machine tool according to the present invention.
Figure 2 shows a conceptual diagram of a state in which the sensing unit of the ATC damage prevention control device of the machine tool is formed as a contact displacement sensor according to the present invention.
Figure 3 shows a conceptual diagram of a state in which the sensing unit of the ATC damage prevention control device of the machine tool is formed as a proximity sensor according to the present invention.
Figure 4 shows a block diagram of the control unit of the ATC damage prevention control device of the machine tool according to the present invention.
Figure 5 shows a flowchart of the ATC damage prevention control method of the machine tool according to the present invention.

Hereinafter, with reference to the drawings of the ATC damage prevention control apparatus and control method of the machine tool according to the present invention according to an embodiment of the present invention will be described in detail. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers refer to like elements throughout.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be embodied in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

The terminology used herein is for the purpose of describing the embodiments, and therefore is not intended to limit the present invention. In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase. As used herein, "comprise" and/or "comprising" refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

1 shows a conceptual diagram of an ATC damage prevention control device of a machine tool according to the present invention, and FIG. 2 shows a conceptual diagram of a state in which a sensing unit of the ATC damage prevention control device of a machine tool according to the present invention is formed with a contact displacement sensor, Figure 3 shows a conceptual diagram of a state in which the sensing unit of the ATC damage prevention control device of the machine tool is formed as a proximity sensor according to the present invention. Figure 4 shows a block diagram of the control unit of the ATC damage prevention control device of the machine tool according to the present invention. Figure 5 shows a flowchart of the ATC damage prevention control method of the machine tool according to the present invention.

An ATC damage prevention control device 1 of a machine tool according to the present invention will be described with reference to FIGS. 1 to 4 . 1 to 4, the ATC damage prevention control device 1 of the machine tool includes a spindle 100, ATC (Automatic tool changer, automatic tool changer, 200), a sensing unit 300, and a control unit ( 400).

Spindle 100 clamps or unclamps the tool. In addition, the spindle tools the workpiece. That is, the spindle 100 is provided with a spindle cylinder 110 that clamps or unclamps the tool by the operation of the cylinder inside the spindle, and when the spindle cylinder rotates by hydraulic pressure, it unclamps the tool and vice versa. Clamps the tool when rotated in the other direction by

The ATC 200 includes the arm 210 and automatically exchanges a tool mounted on the spindle with another tool. That is, the ATC 200 includes an arm unit 210 that enters/exits (IN/OUT) according to a tool change signal and rotates approximately once per second by a servo motor, and one gripper of the arm is accommodated in a magazine and a spindle Holds the exchange tool (3) to be exchanged with the machining tool (2) mounted on the. The arm part is drawn out by the tool change signal and rotated while unclamped by the spindle cylinder and the tool unclamped to the spindle is gripped with an empty gripper on the other side of the arm, and the arm part rotates and is gripped by one gripper on the other side of the arm. Clamp the tool to the spindle. Specifically, when the exchange tool is inserted into the collet in the spindle, the spindle cylinder rotates to clamp the tool.

The sensing unit 300 is installed on one side of the spindle to detect whether the tool is unclamped or clamped of the spindle when a tool change signal is generated. That is, the sensing unit 300 is installed at the rear of the machining area opposite to where the tool of the spindle is mounted, and detects whether the tool is unclamped and the tool clamped of the spindle when a tool change signal is generated. Although not necessarily limited thereto, the sensing unit 300 may be formed of a contact displacement sensor (LVDT sensor) or a proximity sensor.

As shown in FIG. 2, if the sensing unit 300 is formed of an LVDT sensor that is a contact displacement sensor, the tool unclamp of the spindle, the abnormal tool clamp of the spindle, the normal tool clamp of the spindle, Detects the clamped state without a tool on the spindle, and transmits the detection signal result to the detection data storage unit. That is, the sensing unit formed of the LVDT sensor detects whether the spindle is tool unclamped and/or the spindle is tool clamped, and transmits the sensing data signal to the sensing data storage unit.

As shown in FIG. 3 , if the sensing unit 300 is formed as a proximity sensor, two are installed on one rear side of the spindle to detect the rotation angle of the spindle cylinder through a dog to unclamp the tool and/or the spindle of the spindle. Detects whether the tool clamp of

The control unit 400 controls the tool exchange or emergency stop operation of the ATC in real time by analyzing whether or not the tool unclamping of the spindle is normally operated according to the detection result of the sensing unit during the operation of the ATC by the tool change signal.

Specifically, the control unit 400 analyzes the detection result of the sensing unit in real time in a state in which the arm of the ATC is drawn out (out) by the tool change signal, and continues to perform the tool exchange of the ATC when the spindle is currently in the tool unclamping state, If the spindle is currently in the tool clamp state, ATC's real-time operation is controlled to immediately stop tool change and generate an alarm.

Therefore, the ATC damage prevention control device of the machine tool according to the present invention prevents damage or damage to the ATC or the tool due to a collision with a tool or a tool fall during tool exchange, and reduces the maintenance cost and time of the machine tool. The productivity of the machine tool is improved by reducing the machining time, and during the tool change that takes place in a very short time of about 1 second, the spindle accurately determines whether the current tool is in the tool unclamped state or the tool clamp state, and ATC continuously changes the tool or emergency stop. It is possible to maximize the stability and reliability of the machine tool by making the decision quickly and accurately.

As shown in FIG. 4 , the control unit 400 of the ATC damage prevention control device 1 of the machine tool according to the present invention includes a memory unit 410 , an analysis unit 420 , a processing unit 430 , and a selection unit 440 . , and a display unit 450 .

In addition, although not shown in the drawings, the control unit of the ATC damage prevention control device of the machine tool according to the present invention includes a PLC.

The control unit includes NC (numerical control, NC) or CNC (computerized numerical control), and various numerical control programs are built-in. That is, a spindle, a magazine, ATC, a sensing unit, a transfer unit driving program, etc. are embedded in the control unit, and the corresponding program is automatically loaded and operated according to the driving of the control unit. In addition, the control unit communicates with the spindle, ATC, sensing unit, magazine, and driving unit by a predetermined protocol.

In addition, although not shown in the drawings, according to a preferred embodiment of the present invention, the control unit includes a main operation unit, and the main operation unit includes a screen display program and a data input program according to screen display selection, and a screen display program Displays the software switch on the display screen according to the output of the software switch, recognizes the ON/OFF of the software switch, and executes the function of issuing input/output commands for machine operation.

In addition, although not necessarily limited thereto, the main operation unit includes a monitor that is installed on the housing, case, or one side of the machine tool or magazine to display various function switches or buttons and various information.

A programmable logic controller (PLC) performs communication according to a predetermined protocol such as a control unit, a spindle, an ATC, a sensing unit, a transfer unit, and a magazine, and performs a function of executing a control command through such communication. That is, the PLC drives the spindle, the ATC, the sensing unit, the magazine, and the transfer unit according to the numerical control program of the control unit.

The memory unit 410 stores data for controlling the tool exchange or emergency stop operation of the ATC in real time by analyzing the normal operation of the tool unclamping of the spindle according to the detection result of the detection unit during the operation of the ATC by the tool change signal. . The memory unit 410 may be various storage devices such as ROM, RAM, EPROM, flash drive, hard drive, and the like, and web storage that performs the storage function of the data storage unit 510 on the Internet (internet). storage) can also be

The analysis unit 420 analyzes the data stored in the memory unit and the detection result of the sensing unit, and determines whether the tool replacement of the ATC continues or an emergency stop of the ATC and an alarm are generated in the state that the dark unit is withdrawn.

The processing unit 430 controls the tool change or emergency stop operation of the ATC by outputting a signal that generates an alarm after continuing execution of the tool change of the ATC or the emergency stop of the ATC according to the analysis result of the analysis unit and the data stored in the memory unit.

Therefore, the ATC damage prevention control device of the machine tool according to the present invention reduces manufacturing cost, promotes miniaturization of equipment, and provides operator convenience by controlling whether immediate ATC emergency stop or tool replacement is continued with only the sensing unit and the control unit. and to prevent accidents in advance.

The selection unit 440 selects whether the tool exchange or emergency stop operation of the ATC is performed according to whether the tool unclamping of the spindle is normally operated during the ATC operation. That is, as shown in FIGS. 1 to 3 , the selection unit 440 exchanges the machining tool 2 mounted on the spindle of the machine tool and the exchange tool 3 held in the ATC by the tool exchange signal of the ATC. During operation, according to the detection result of the sensor, it is analyzed whether the tool unclamping of the spindle is operating normally, and whether to control the tool change or emergency stop operation of the ATC in real time is determined through the on/off function through a simple button operation according to the user's will. can

Specifically, the selection unit is displayed in the form of a button on the display unit or the operation panel of the control unit, and when the user operates the button to generate a tool change signal, the ATC operates and analyzes the detection result of the sensing unit in real time while the arm is drawn out (out), and if the spindle In case of the current tool unclamping state, ATC tool change is continued. On the other hand, if the spindle is in the current tool clamping state, ATC operation control that immediately stops the ATC tool change and generates an alarm is performed. It can be decided through the on/off function through a simple button operation according to the user's will as to whether or not to perform tool change quickly and repeatedly without using an emergency stop.

The display unit 450 may display the results of the memory unit, the analysis unit, the processing unit, and the selection unit to improve user convenience. Such a display unit is a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display (flexible display), It may include at least one of a three-dimensional display (3D display) and an electronic ink display (e-ink display).

In addition, although not necessarily limited thereto, the display unit is formed in the form of a touch screen and installed on the housing, case, or one side of the machine tool to display various function switches or buttons and various information. In this way, as various states are displayed on the display unit, the user or operator can check the current operating state and equipment state of the machine tool in real time to prevent possible collisions or damage to tools or equipment in advance, thereby reducing maintenance costs and time. It prevents safety accidents and prepares for sudden accidents through alarms, etc.

As shown in Fig. 4, the memory unit 410 of the control unit 400 of the ATC damage prevention control device of the machine tool according to the present invention includes a basic data storage unit 411, a tool data storage unit 412, and location data storage. It includes a unit 413 , and a sensing data storage unit 414 .

The basic data storage unit 411 stores data for the spindle, ATC, and machining program. In addition, if necessary, a reference value of the difference value may be stored.

The tool data storage unit 412 stores data on the weight of the tool for each type of tool. That is, the rotation of ATC is divided into high speed/medium speed/low speed according to the weight of the tool, and accordingly, as the rotation angle and phase are different, data on the tool weight is stored to check whether the ATC is high speed/medium speed/low speed, etc. determined through Specifically, when the weight of the tool is heavy, the rotation of the ATC and the retraction and withdrawal of the arm are operated at a low speed to prevent the tool from falling due to its own weight when the ATC is rotated or the arm is drawn out or retracted for tool exchange. Conversely, if the weight of the tool is light, the ATC rotates and the arm part enters and withdraws at high speed in order to change the tool quickly and improve productivity by reducing the non-working time. Similarly, when the tool weight is usually in the middle, the rotation of the ATC and the retracting and withdrawing of the arm operate at medium speed in order to perform a stable and fast tool change.

The position data storage unit 413 stores position data on the tool clamp position and the tool unclamp position of the spindle according to the weight of the tool stored in the tool data storage unit. That is, the position data storage unit changes the rotation angle differently depending on the feed speed of low/medium/high speed according to the weight of the tool, and stores the position data for the rotation angle or phase according to each speed in the form of a lookup table.

The detection data storage unit 414 stores the tool unclamp detection data of the current spindle and/or the tool clamp detection data of the spindle according to the detection result of the detection unit. That is, the detection data storage unit detects a phase such as position or angle through a sensor signal whether the spindle is currently clamping or unclamping the tool according to the sensing result of the detection unit, and transmits the digitally converted angle signal to the detection data storage unit in real time. Save.

As shown in FIG. 4 , the analysis unit 420 of the control unit 400 of the ATC damage prevention control device of the machine tool according to the present invention includes a confirmation unit 421 , a comparison unit 422 , and a determination unit 423 . include

The check unit 421 checks whether the tool change signal is generated and the weight of the tool currently clamped to the spindle and the weight of the tool to be exchanged by the ATC according to the data stored in the tool data storage unit. Accordingly, the confirmation unit checks the current ATC and the low/middle/high operating speed of the arm unit at the time the tool change signal is generated.

The comparison unit 422 compares the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle according to the result of the confirmation unit, the position data storage unit, and the data stored in the detection data storage unit.

The determination unit 423 determines whether a difference occurs between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle according to the confirmation result of the confirmation unit and the comparison result of the comparison unit.

Therefore, the ATC damage prevention control device of the machine tool according to the present invention accurately determines whether the spindle is currently in the tool unclamped state or the tool clamped state during the tool change in a very short time of about 1 second, and ATC continuous tool change or emergency By determining the stop quickly and accurately, the stability and reliability of the machine tool can be maximized, the manufacturing cost is reduced, the equipment is miniaturized, the operator's convenience is promoted, and the safety accident can be prevented in advance.

A method for preventing ATC damage of a machine tool according to the present invention will be described with reference to FIG. 5 . As shown in Figure 5, the ATC damage prevention control method of the machine tool according to the present invention is a data storage step (S1), a selection step (S2), a confirmation step (S3), a detection step (S4), a comparison step (S5) , a determination step (S6), and a processing step (S7). In each step, the control process, control principle, configuration, and content of the device are the same as the ATC damage prevention control device of the machine tool of the specification of the present invention. is mainly explained.

During the operation of the ATC by the tool change signal, the data for controlling the tool change or emergency stop operation of the ATC in real time is stored in the memory by analyzing the normal operation of the tool unclamping of the spindle according to the detection result of the sensing unit.

After the data storage step (S1), the selection unit selects whether to activate the tool change emergency stop operation function of ATC by analyzing in real time whether or not the tool unclamping of the spindle is operating normally during ATC operation.

After the selection step (S2), if the ON function is selected, the confirmation unit checks whether a tool change signal is generated and the weight of the tool currently clamped to the spindle and the weight of the tool to be exchanged by the ATC according to the pre-stored tool data.

After the checking step S3, the sensing unit detects whether the tool unclamps the spindle or the tool clamps the spindle according to the check result.

After the detection step S4, the comparison unit compares the tool unclamp position data of the spindle with the tool unclamp detection data of the spindle based on the confirmation result, the detection result, and the pre-stored data.

After the comparison step (S5), the determination unit determines whether a difference between the tool unclamping position data of the spindle and the tool unclamping detection data of the spindle occurs according to the confirmation result and the comparison result.

After the determination step (S6), the difference between the tool unclamping position data of the spindle and the tool unclamping detection data of the spindle occurs when the ATC is operated by the tool change signal according to the determination result and the arm of the ATC is withdrawn At the same time, the spindle emergency stops ATC in the current tool clamp state and generates an alarm, and if there is no difference between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle, ATC tool exchange is continued. output the signal and process it.

A control principle of the ATC damage prevention control apparatus and control method of a machine tool according to the present invention will be described with reference to FIGS. 1 to 5 .

When the tool change signal is generated, the confirmation unit checks whether the tool change signal is normally generated and the feed rate of the ATC and the arm according to the tool weight of the machining tool currently mounted on the spindle and the tool weight of the exchange tool held in the gripper of the ATC arm. do.

According to the tool change signal, ATC operates and the arm is drawn out. In a state in which the arm is drawn out by the tool change signal, the sensing unit senses the tool unclamping or tool clamping position of the spindle. The tool unclamp detection data or tool clamp detection data of the spindle sensed by the detection unit is transmitted to the detection data storage unit.

Thereafter, the comparison unit compares the ATC according to the weight of the replacement tool to be exchanged with the current machining tool as a result of the confirmation of the verification unit, the stored position data according to the movement speed of the arm, and the tool unclamp detection data of the spindle sensed through the sensing unit with each other.

Thereafter, the determination unit determines whether a difference occurs between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle according to the confirmation result of the confirmation unit and the comparison result of the comparison unit.

For example, it is confirmed that the tool unclamp position data of machining tool P93 is 65 degrees through the data stored in the position data storage unit, and the sensing data received from the sensing data storage unit for the tool unclamping detection data of the current spindle through the sensing unit. If is 65, it is determined that the spindle is currently in a normal tool unclamping state, and the processing unit outputs a signal to continue the ATC tool change, and ATC continues the tool change.

Conversely, the tool unclamp position data of the machining tool P93 is confirmed to be 65 degrees through the data stored in the position data storage unit, and the detection data received from the sensing data storage unit for the tool unclamp detection data of the current spindle through the sensing unit is 75 In the case of , it is judged that the spindle is currently in an abnormal state of tool unclamping, and the tool change of ATC is immediately stopped, an alarm is generated, and the tool change is stopped.

Accordingly, the ATC damage prevention control apparatus and control method for a machine tool according to the present invention analyzes the detection result of the sensing unit in real time in a state in which the arm is drawn out by the ATC operation by the tool change signal, so that the spindle is in the current tool unclamping state. In this case, ATC tool change is continued, and if the spindle is in the current tool clamp state, ATC tool change is immediately stopped and ATC operation is controlled in real time to generate an alarm to prevent collisions with tools or tools during tool change. Prevents ATC or tool breakage or damage due to a fall, reduces machine tool maintenance cost and time, improves machine tool productivity by reducing non-working time, and during tool change in a very short time of about 1 second It accurately determines whether the spindle is currently in tool unclamped state or tool clamped state, and determines ATC's continuous tool change or emergency stop quickly and accurately to maximize machine tool stability and reliability, reduce manufacturing costs, and reduce equipment size. It is possible to promote safety, convenience of workers, and prevention of safety accidents in advance.

Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary knowledge in the art will It will be understood that various modifications and variations of the present invention can be made without departing from the spirit and scope of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: ATC damage prevention control device of machine tool
100: spindle
200 : ATC
300: sensing unit
400: control unit
410: memory unit
420: analysis unit
430: processing unit
440: selection part
450: display

Claims (8)

spindle to clamp or unclamp the tool;
ATC having an arm and automatically exchanging a tool mounted on the spindle with another tool;
a sensing unit installed on one side of the spindle to detect whether the spindle is unclamped or clamped when a tool change signal is generated; and
A control unit for controlling the tool exchange or emergency stop operation of the ATC in real time by analyzing whether or not the tool unclamping of the spindle is normally operated according to the detection result of the detection unit during the operation of the ATC by the tool change signal ATC damage prevention control device for machine tools with
According to claim 1,
The control unit is
In a state in which the arm portion of the ATC is drawn out by the tool change signal, the detection result of the detection unit is analyzed in real time, and when the spindle is currently in the tool unclamped state, the tool exchange of the ATC is continued, and the spindle is the current tool. ATC damage prevention control device of a machine tool, characterized in that in the case of clamping, the tool change of the ATC is immediately stopped and an alarm is generated. According to claim 1,
The control unit is
A memory unit for storing data for real-time control of the tool change or emergency stop operation of the ATC by analyzing whether the tool unclamping of the spindle is normally operated according to the detection result of the sensing unit during the operation of the ATC by the tool change signal ;
an analysis unit that analyzes the data stored in the memory unit and the detection result of the sensing unit, and determines whether the tool replacement of the ATC continues or an emergency stop of the ATC and an alarm occur while the arm unit is withdrawn; and
ATC damage prevention control device of a machine tool, including a; processing unit for outputting a signal to generate an alarm after the continuous execution of the tool replacement of the ATC or the emergency stop of the ATC according to the analysis result of the analysis unit.
4. The method of claim 3,
The memory unit,
a basic data storage unit for storing data on the spindle, ATC, and part program;
a tool data storage unit for storing data on the weight of the tool;
a position data storage unit for storing position data on a tool clamp position and a tool unclamp position of the spindle according to the weight of the tool stored in the tool data storage unit; and
ATC damage prevention control apparatus of a machine tool comprising a; a detection data storage unit for storing the current tool unclamp detection data of the spindle and the tool clamp detection data of the spindle according to the detection result of the detection unit.
5. The method of claim 4,
The analysis unit,
a confirmation unit for confirming the weight of the tool currently clamped to the spindle and the weight of the tool to be exchanged by the ATC according to whether a tool change signal is generated and the data stored in the tool data storage unit;
a comparison unit comparing the tool unclamping position data of the spindle with the tool unclamping detection data of the spindle based on the result of the confirmation of the confirmation unit, the position data storage unit, and the data stored in the detection data storage unit; and
A determination unit for judging whether a difference between the tool unclamping position data of the spindle and the tool unclamping detection data of the spindle occurs according to the confirmation result of the confirmation unit and the comparison result of the comparison unit; ATC anti-vandal control of the machine.
4. The method of claim 3,
The control unit is
a selection unit for selecting whether to operate the ATC for tool exchange or emergency stop operation according to whether the tool unclamping of the spindle is normally operated during the ATC operation; and
ATC damage prevention control apparatus of a machine tool, characterized in that it further comprises; the memory unit, the analysis unit, the processing unit, and a display unit for displaying the results of the selection unit.
According to claim 1,
ATC damage prevention control device of a machine tool, characterized in that the sensing unit is formed of a contact displacement sensor or a proximity sensor.
Storing data for real-time control of tool exchange or emergency stop operation of the ATC by analyzing whether or not the tool unclamping of the spindle is normally operated according to the detection result of the sensing unit during the operation of the ATC by the tool change signal;
selecting whether to activate the tool exchange emergency stop operation function of the ATC by analyzing in real time whether the tool unclamping of the spindle is normally operated during the ATC operation;
confirming the weight of the tool currently clamped to the spindle and the weight of the tool to be exchanged by the ATC according to the presence or absence of a tool change signal and pre-stored tool data;
detecting whether the spindle is tool unclamped or tool clamped according to the check result;
comparing the tool unclamp position data of the spindle with the tool unclamp detection data of the spindle based on the confirmation result, the detection result, and the pre-stored data;
determining whether there is a difference between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle according to the confirmation result and the comparison result; and
According to the determination result, when the ATC is operated by the tool change signal and a difference occurs between the tool unclamping position data of the spindle and the tool unclamping detection data of the spindle in a state in which the arm of the ATC is drawn out, the spindle is In the current tool clamp state, an alarm is generated at the same time that the ATC is stopped and the tool exchange of the ATC is continued if the difference between the tool unclamp position data of the spindle and the tool unclamp detection data of the spindle does not occur. ATC damage prevention control method of a machine tool comprising a; outputting a signal to be performed.

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