KR20210131191A - Tool clamp confirmation apparatus and method thereof - Google Patents

Abstract

The present invention relates to a tool clamp checking device and a checking method of a machine tool. According to the present invention, the tool clamp checking device of a machine tool calculates the close contact distance between a spindle and a tool according to the type of the tool clamped on the spindle, and automatically checks whether the clamp is normal in real time before or during machining to prevent the tool from shaking and match the concentricity to ensure the improvement in machining accuracy of a workpiece, thereby preventing tool damage.

Description

Tool clamp confirmation apparatus and method thereof

The present invention relates to a tool clamp checking apparatus and a checking method, and more particularly, by calculating the close contact distance between the spindle and the tool according to the type of tool clamped to the spindle, it is possible to check whether the clamp of the tool clamped on the spindle is normal or not before machining the workpiece. It also relates to a tool clamp confirmation device and confirmation method of a machine tool that can automatically check in real time during machining to prevent vibration of the tool, improve the machining precision of the workpiece by matching the concentricity, and prevent damage to the tool.

In general, a machine tool refers to a machine used for the purpose of processing 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, multi-tasking machines, etc. is being used

Among machine tools, multi-tasking machine means a turning center equipped with a multi-function automatic tool changer (ATC) and tool magazine that performs various machining types such as turning, drilling, tapping, and milling. In the multi-tasking machine, the operator loads the tool required for machining or manually loads the tool into the tool magazine when exchanging it.

In general, various types of machine tools currently used have an operation panel to which 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 includes 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 when a tool or workpiece is 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 which conveys along a conveying axis in order to perform various processing.

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 tool changer (ATC, Automatic Tool Changer) for withdrawing a specific tool from the tool magazine or receiving it again according to the command of the numerical control unit in order to improve the productivity of the machine tool.

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 addition, 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 the conventional tool clamp confirmation apparatus and confirmation method of a machine tool, a displacement sensor is attached to the rear of a drawbar to measure a displacement value that changes during tool clamping, and an alarm is generated. However, in the case of the displacement sensor attachment method, since the amount of push of the drawbar varies due to the error of the tool shank, precise setting is difficult, which causes inconvenience to the operator, productivity decreases as the non-working time increases, and it is difficult to accurately check the tool clamp. There was a problem in that the stability and reliability of the

In addition, the tool clamp confirmation apparatus and method of a conventional machine tool generate an alarm when air pressure is leaked by spraying air to the clamped tip surfaces of the spindle and the tool. However, in the case of the air injection method, since a separate cylinder must be configured to connect the spindle and the air line, the structure is complicated, which increases manufacturing cost, manufacturing time and installation time, increases maintenance cost and time, and reduces downsizing. There was a problem in that space utilization was reduced because it could not be achieved.

Furthermore, the tool clamp confirmation apparatus and method of the conventional machine tool are installed on the side of the spindle to measure the shaking of the tool with an eddy current to check the clamp of the tool. However, in the eddy current measurement method, as the eddy current measuring device protrudes to the outside of the spindle and is installed, maintenance costs increase due to damage or chip contamination during processing, installation is difficult, and the equipment itself is expensive, so it is expensive to check the tool clamp. There was a problem with this consumption.

Accordingly, the structure is simple, the clamp of the tool and the spindle is accurately detected, maintenance is easy, and the setting is simple, which promotes the convenience of the operator. There is an urgent need to develop a tool clamp checking device and a checking method that can check the status.

Korean Patent Publication No. 10-2004-0060515 Korean Patent Publication No. 10-2009-0054484 Korean Patent Registration Publication No. 10-0728282

The present invention is to solve the above problems, and an object of the present invention is to transmit a signal from the sensing unit to the transmitting unit installed in the receiving unit by the control unit and according to the time the sensing unit receives the signal returning through the transmitting unit. By calculating the close contact distance between the spindle and the tool clamped on the spindle, it automatically checks whether the clamp of the tool clamped on the spindle is normal in real time as well as before machining the workpiece, thereby preventing tool vibration and matching the concentricity of the machine tool. Maximize processing precision to reduce defective products and prevent wastage of resources, improve machine tool stability and reliability through precise checking of tool clamps, increase machine tool productivity by minimizing non-working time, and tool clamp check device It is to provide a tool clamp confirmation device and confirmation method that can maximize space utilization through miniaturization of machine tools, reduce overall manufacturing and maintenance costs of machine tools, and promote operator convenience.

In order to achieve the object of the present invention, the tool clamp check apparatus according to the present invention includes a spindle for clamping the tool; a receiving part extending from the inside of the spindle to a front end of the spindle in the direction of the rotation axis and the other end extending to a front end in the radial direction of the spindle; a sensing unit installed on a part of the spindle so as to be adjacent to the other side of the receiving unit to transmit and receive a signal; a transmitting unit installed inside the receiving unit to transmit a signal transmitted from the sensing unit; a sensing unit installed in a portion of the spindle in the direction of the rotation axis to sense the rotation position of the spindle; and a control unit that calculates a close contact distance between the spindle and the tool through the sensing unit and the signal received from the sensing unit to check in real time whether or not the clamp of the tool on the spindle is normal.

In addition, in another preferred embodiment of the tool clamp checking device according to the present invention, a plurality of the receiving portion of the tool clamp checking device is formed inside the spindle so as to be spaced apart at a predetermined angle with respect to the axis of rotation of the spindle, and the transmission unit Each of the accommodating parts formed in plurality may be installed, respectively.

In addition, in another preferred embodiment of the tool clamp check device according to the present invention, the receiving portion of the tool clamp check device may be formed through the inside of the spindle in a diagonal or L-shape.

In addition, in another preferred embodiment of the tool clamp check apparatus according to the present invention, the tool clamp check apparatus may further include an air blower unit for supplying air between the sensing unit and the other side of the receiving unit.

In addition, in another preferred embodiment of the tool clamp confirmation apparatus according to the present invention, the control unit of the tool clamp confirmation apparatus stores a processing program, the number of the accommodation portions, position data of the accommodation portion, tool data, and reference contact distance range data. a data storage unit; a confirmation unit for confirming the type of tool clamped to the spindle and the presence or absence of processing; a detection unit configured to detect a signal of the sensing unit when the transmitting unit installed in the receiving unit by the sensing unit coincides with the sensing unit when the spindle rotates; a determination unit for determining whether a signal is detected from all of the transmitting units installed in the receiving unit from the detecting unit; a calculation unit for calculating a contact distance between the spindle and the tool clamped to the spindle based on the verification result of the verification unit, the detection result of the detection unit, the determination result of the determination unit, and the data stored in the data storage unit; a comparison unit for comparing the calculated adhesion distance calculated by the calculator with a reference adhesion distance range stored in the data storage unit; and an analysis unit that analyzes the comparison result of the comparison unit to determine whether the clamp of the tool is normal.

In addition, in another preferred embodiment of the tool clamp confirmation apparatus according to the present invention, the analysis unit of the control unit of the tool clamp confirmation apparatus receives a processing signal when the calculated adhesion distance in all transfer units is within the reference adhesion distance range before processing the workpiece. When the calculated adhesion distance from one or more transfer units exceeds the standard adhesion distance range, a clamp error signal is generated. A signal is generated, and when the calculated adhesion distance from one or more transfer units is less than the standard adhesion distance range, a setting error signal is generated, and the calculated adhesion distance from one or more transfer units exceeds the standard adhesion distance range during workpiece processing In this case, an equipment check signal may be generated.

In order to achieve another object of the present invention, the tool clamp confirmation method according to the present invention calculates the close contact distance between the spindle and the tool clamped on the spindle, and stores data for checking in real time whether the clamp of the tool on the spindle is normal or not. to do; checking the type of tool clamped to the spindle and the presence or absence of processing; detecting a signal of the sensing unit when the transmitting unit installed in the receiving unit and the sensing unit coincide with each other by the sensing unit when the spindle rotates; determining whether a signal is detected from all the transfer units installed in the receiving unit, respectively; calculating an adhesion distance between the spindle and the tool clamped to the spindle based on the confirmation result, the detection result, the determination result, and pre-stored data; comparing the calculated adhesion distance calculated as a result of the calculation with a pre-stored reference adhesion distance range; and analyzing the comparison result to determine in real time whether the clamp of the tool is normal or not.

The tool clamp confirmation device and method according to the present invention transmits a signal from the sensing unit to the transmission unit installed in the receiving unit by the control unit and clamps the spindle and the spindle according to the time the sensing unit receives the signal returning through the transmission unit. By calculating the close contact distance of the tool, the clamping of the tool clamped on the spindle is automatically checked precisely and quickly in real-time before and during machining as well as during machining, thereby preventing the vibration of the tool and matching the concentricity of the machining precision of the machine tool. It has the effect of reducing the occurrence of defective products and preventing the waste of resources by maximizing the

In addition, the tool clamp confirmation apparatus and the confirmation method according to the present invention have the effect of improving the stability and reliability of the machine tool through precise confirmation of the tool clamp, and minimizing the non-working time to increase the productivity of the machine tool.

Furthermore, the tool clamp confirmation apparatus and method according to the present invention simplify the structure of the apparatus and control the tool clamp in real time before machining as well as during tool exchange in real time, thereby reducing the size of the tool clamp checking apparatus. This has the effect of maximizing space utilization and reducing overall manufacturing and maintenance costs of machine tools.

In addition, the tool clamp confirmation apparatus and method according to the present invention have the effect of increasing the convenience of the operator by automatically and accurately and quickly checking whether the tool clamp is normal in real time before and during processing through a simple operation.

1 shows a cross-sectional view of a tool clamp confirmation device according to the present invention.
Figure 2 shows a block diagram of the configuration of the control unit of the tool clamp confirmation device according to the present invention.
Figure 3 shows a flow chart of the tool clamp confirmation method according to the present invention.

Hereinafter, with reference to the drawings of the tool clamp confirmation device and confirmation method 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 for 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 implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform the possessor 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 thus is not intended to limit the present invention. As used herein, 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.

Figure 1 shows a cross-sectional view of the tool clamp check device according to the present invention, Figure 2 shows a block diagram of the configuration of the control unit of the tool clamp check device according to the present invention. Figure 3 shows a flow chart of the tool clamp confirmation method according to the present invention.

Definitions of terms used below are as follows. "Rotation axis direction" means the axis on which the spindle rotates, the C-axis direction in FIG. 1, and "radial direction" means the radially expanding direction of the axial direction, that is, the R direction in FIG. 1 . In addition, inside (inside) means a side relatively close to the center of the same member, that is, inside in FIG. 1, and outside (outside) means a side relatively far from the center in the same member, ie, outside in FIG. 1 .

A tool clamp confirmation device 1 according to the present invention will be described with reference to FIGS. 1 to 2 . As shown in FIG. 1 , the tool clamp confirmation device 1 according to the present invention includes a spindle 10 , a receiving unit 20 , a transmitting unit 30 , a sensing unit 40 , a sensing unit 50 , and a control unit. (60).

The spindle 10 is installed on a bed or the like to clamp or unclamp the tool 11 . Although not shown in the drawings, the spindle 10 is rotated by being coupled to a driving motor via a timing belt or by a built-in motor. That is, as the spindle rotates, the tool clamped to the spindle also rotates in conjunction with the spindle.

In the accommodating part 20, one side 21 of the accommodating part in the inside of the spindle 10 extends in the rotational axis direction (C-axis) of the spindle, and the other 22 of the accommodating part is in the radial direction (R-direction) of the spindle. extension is formed. That is, the accommodating part 20 extends toward the front end of the spindle in the rotational axis direction so that one side 21 of the accommodating part faces the contact surface where the tool is coupled with the spindle, and the other side 22 of the accommodating part is the installation surface of the sensing part. It is formed extending toward the radial tip of the spindle.

The transmitting unit 30 is installed inside the receiving unit 20 to transmit a signal transmitted from the sensing unit. Although not necessarily limited thereto, the transfer unit 30 may be formed of a reflector, glass, optical fiber, or the like.

The sensing unit 40 is installed on a part of the spindle 10 so as to be adjacent to the other side of the receiving unit to transmit and receive signals. That is, the sensing unit 40 is installed in a part of the radial direction (R) of the spindle, not in the rotation axis direction (C) of the spindle where the tool is coupled to the spindle, and transmits signals such as laser, infrared, and ultrasonic waves, and through the transmission unit It is transmitted and moves to the contact surface of the tool and the spindle, and then it receives a signal transmitted through the transmission unit by being reflected again. Although not necessarily limited thereto, preferably, the sensing unit 40 is formed of a time of flight (TOF) sensor, so that the contact distance can be calculated over time.

As shown in Fig. 1, the receiving portion 20 is bent at the front end of the parallel portion and the parallel portion parallel to the direction of the rotation axis (C) so that one side 21 of the receiving portion faces the contact surface where the tool and the spindle are coupled. The other side 22 of the part is formed to extend in the radial direction (R) of the spindle to face the installation surface of the sensing part on the upper part of the spindle. That is, a plurality of accommodating portions may be formed through the inside of the spindle in an overall “L” shape. As such, when the receiving portion is formed in a L-shape, it is difficult to transmit the signal of the sensing unit to the contact surface with a reflector, glass, or the like and reflect it again, so it is preferable that the transmitting unit is formed of an optical fiber. In addition, as the receiving portion is formed in a L-shape, the front structure of the spindle is simplified, and the thickness of the spindle is minimized to secure installation convenience and reduce the size of the spindle.

Although not shown in the drawings, the receiving part 20 may also be formed through a plurality of diagonals inside the spindle. That is, one side of the accommodating part is formed to face the contact surface where the tool and the spindle are coupled, and the other side of the accommodating part is formed in a straight line to face the installation surface of the sensing part in the radial direction of the spindle. That is, the accommodating part has a constant inclination angle with respect to the rotation axis, one side of the accommodating part extends to the contact surface of the tool and the spindle, and the other side of the accommodating part extends to the installation surface of the sensing part. In this way, when the receiving portion is formed in a diagonal shape, there is no signal bending, and the transmitting portion is formed of a transmitting material capable of transmitting laser or infrared rays such as a reflector or glass, thereby reducing manufacturing costs.

The sensing unit 50 is installed on a part of the spindle 10 in the rotational axis direction to sense the rotational position of the spindle. That is, the sensing unit 50 is installed at the rear of the spindle so as to be spaced apart from the sensing unit with respect to the direction of the rotation axis of the spindle to sense the rotational position of the spindle during the rotational operation of the spindle. Specifically, the sensing unit detects the position of the spindle at the moment the transmission unit and the sensing unit coincide when the spindle rotates, and the sensing unit 50 may be formed of an encoder, a Biz sensor, or the like.

The control unit 60 calculates the close contact distance between the spindle and the tool through the signals received from the sensing unit 50 and the sensing unit 40 to determine whether the clamp of the tool clamped on the spindle is normal as well as before processing the workpiece. It also performs a function to check in real time.

Therefore, the tool clamp confirmation device according to the present invention transmits a signal from the sensing unit to the transmission unit installed in the receiving unit by the control unit, and the tool clamped to the spindle and the spindle according to the time the sensing unit receives the signal returning through the transmission unit By calculating the close contact distance of the tool clamping on the spindle, it is automatically and precisely and quickly checked in real time before and during machining as well as during machining, thereby maximizing machining precision to reduce the occurrence of defective products and prevent wastage of resources. It improves the stability and reliability of the machine, and it can increase the productivity of the machine tool by minimizing the non-working time.

In addition, as shown in FIG. 1 , the accommodating part 20 is formed in plurality to be spaced apart at a predetermined angle with respect to the rotation axis C of the spindle inside the spindle 10 , and the transfer part 30 is formed in plurality. Each of the receiving portions 20 to be installed are respectively.

Specifically, in order to accurately and quickly check whether the tool clamp is normal or not, the sensing unit detects it when the spindle rotates, transmits a signal from the sensing unit to at least two transmission units, and receives and analyzes the signal reflected from the transmission unit. Should be. In the end, two receiving parts are spaced apart at an angle of 180 degrees around the axis of rotation of the spindle inside the spindle, three are spaced apart at an angle of 120 degrees, four are spaced apart at an angle of 90 degrees, six are spaced apart at an angle of 60 degrees, Eight pieces spaced apart at an angle of 45 degrees, 12 pieces spaced apart at an angle of 30 degrees, 24 pieces spaced apart at an angle of 15 degrees, or 36 pieces spaced at an angle of 10 degrees can be formed through the inside of the spindle around the rotation axis of the spindle. have.

Also, a transmission unit is provided in each of these 2, 4, 6, 8, 12, 24, or 36 all receiving units. That is, for example, when the transmission unit is formed in two so that the receiving part is spaced apart at an angle of 180 degrees about the rotation axis, a total of two are installed in each receiving part spaced apart at an angle of 180 degrees about the rotation axis, and When the four are formed to be spaced apart at an angle of 90 degrees, a total of four are installed in each receiving part spaced apart at an angle of 90 degrees with respect to the axis of rotation.

Accordingly, the tool clamp checking device according to the present invention simplifies the structure of the device and allows the tool clamp to be checked in real time before machining as well as during machining in real time through a control method. It maximizes the efficiency of the machine tool, reduces the overall manufacturing and maintenance costs of the machine tool, and through simple operation, the operator's convenience can be promoted by automatically and accurately and quickly checking the normality of the tool clamp before and during machining in real time.

As shown in FIG. 1 , the tool clamp confirmation device 1 according to the present invention further includes an air blower unit 70 .

The air blower unit 70 supplies air between the sensing unit 40 and the other side 22 of the receiving unit. That is, the air blower unit 700 supplies the air pressure supplied from the air supply source through the air line between the sensing unit and the other side of the receiving unit to the transmitting unit, in particular, foreign substances penetrating into the transmitting unit formed of optical fibers and attached to the sensing unit. By removing foreign substances, the accuracy of the calculation of the close contact distance is increased, the speed and stability of the tool clamp confirmation result is increased, the maintenance cost and time are reduced by preventing malfunctions, and the productivity is improved by reducing the non-working time, and the convenience of the operator is increased. can be promoted

As shown in FIG. 2 , the control unit 60 of the tool clamp confirmation device 1 according to the present invention includes a data storage unit 61 , a confirmation unit 62 , a detection unit 63 , a determination unit 64 , and a calculation unit 65 , a comparison unit 66 , and an analysis unit 67 .

In addition, although not shown in the drawings, the control unit of the tool clamp confirmation device 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 tool changing device, and a driving program of a magazine are built-in 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, PLC, transmission unit, sensing unit, and sensing 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 an input/output command 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 to display various function switches or buttons and various information.

A programmable logic controller (PLC) performs communication according to a predetermined protocol with a control unit, a spindle, a transmission unit, a sensing unit, a sensing unit, and the like, and performs a function of executing a control command through such communication. That is, the PLC drives the spindle, drive motor, magazine, tool changer, etc. according to the numerical control program of the control unit.

Therefore, the tool clamp confirmation device according to the present invention transmits a signal from the sensing unit to the transmission unit installed in the receiving unit by the control unit, and the tool clamped to the spindle and the spindle according to the time the sensing unit receives the signal returning through the transmission unit By calculating the close contact distance of the spindle, it automatically checks whether the clamp of the tool clamped on the spindle is normal in real-time as well as before machining the workpiece, thereby preventing the vibration of the tool and matching the concentricity to maximize the machining precision of the machine tool, resulting in defective products. It prevents reduction and waste of resources, improves the stability and reliability of machine tools through precise confirmation of tool clamps, increases productivity of machine tools by minimizing non-working time, and improves space utilization through miniaturization of tool clamp confirmation devices. It can maximize, reduce the overall manufacturing cost and maintenance cost of the machine tool, and promote the convenience of the operator.

Although not shown in the drawings, the control unit 60 of the tool clamp device 1 according to the present invention may further include a display unit and/or a selection unit.

The display unit may improve user convenience by displaying the results of the data storage unit, the confirmation unit, the detection unit, the determination unit, the calculation unit, the comparison unit, and/or the analysis unit and the selection result of the selection unit to be described later in real time. 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 e-ink display (e-ink display).

In addition, although not necessarily limited thereto, the display unit calculates the close contact distance between the spindle and the tool clamped to the spindle, and various processing programs, the number of receiving units, and the position of the receiving units are used to check in real time whether the tool is clamped on the spindle in real time. It may be formed in the form of a touch screen that can receive data, tool data, reference contact distance range data, or a user's operation command, and output the received operation command or workpiece processing condition information to a PLC or a control unit.

In addition, the display unit includes a screen display program and a data input program according to screen display selection, displays a software switch on the display screen according to the output of the screen display program, and recognizes ON/OFF of the software switch It performs the function of issuing input/output commands for machine operation.

In addition, although not necessarily limited thereto, the display unit may be installed on the housing, case, or one side of the machine tool to display various function switches or buttons and various information.

The selection unit performs a function of selecting whether to automatically check in real time whether the tool clamped on the spindle is normal or not when the tool is exchanged before processing the workpiece or during processing of the workpiece. Specifically, the selection unit is formed in the form of a button on the display unit, and when the user performs the tool clamp real-time automatic confirmation mode function through button manipulation, the control unit determines the processing program, the number of receiving units, position data of the receiving units, and the tool clamped on the spindle. By calculating the close contact distance between the spindle and the tool based on the type of tool data and the standard contact distance range data, etc., it is automatically checked in real time whether the tool clamped on the spindle is clamped during the machining of the work piece as well as when the tool is exchanged before machining the work piece. do. Conversely, if the user does not perform the real-time automatic confirmation mode function to check whether the tool clamp is normal or not through button operation, the tool clamp does not perform the tool clamp automatic confirmation mode function because the adhesion distance between the tool and the spindle is not calculated. . In this way, as the user arbitrarily selects whether to check the tool clamp as needed, it is possible to maximize the productivity by reducing the machining time, promote the user's convenience, and maximize the machining precision.

The data storage unit 61 includes a processing program, the number of accommodating parts formed on the spindle, position data of accommodating parts formed through a plurality of accommodating parts on the spindle, tool data related to the type, size, length, etc. of the tool, and reference adhesion according to the type and size of the tool. Store distance range data. The reference adhesion distance range data is stored in the form of a lookup table, and when it is not in the reference adhesion distance range data, it can be calculated and applied through interpolation or the like.

The confirmation unit 62 checks whether the workpiece is processed by the type of the tool 11 clamped to the spindle 10 and the tool. In other words, even when machining a workpiece with a spindle, since the close contact distance between the tool and the spindle must be calculated in real time, the current state of the machine tool and the appropriate data among the many data stored in the data storage unit are clamped to the spindle to produce optimal results. Check the type of tool to be used first.

The detection unit 63 detects a signal of the sensing unit when the transmitting unit installed in the receiving unit by the sensing unit coincides with the sensing unit during spindle rotation. That is, the detection unit 63 transmits from the sensing unit when the transmitting unit installed in the receiving unit and the sensing unit coincide with each other when the spindle rotates during workpiece processing or after tool exchange, and is transmitted from the sensing unit and reflected from the contact surface through the transmitting unit. It detects the signal transmitted to the sensing unit and the transmission time again.

The determination unit 64 determines whether signals are detected from all transmission units respectively installed in the receiving units from the detection unit 63 . That is, when the spindle rotates, the determination unit 64 determines whether the signal is reflected and transmitted from all the transmitting units to the sensing unit to check the time when the signal is reflected back to the sensing unit from all the transmitting units. Specifically, for example, the determination unit is formed through two accommodating units spaced apart at intervals of 180 degrees around the axis of rotation inside the spindle, and when the transfer units are installed in each of these receiving units, the spindle rotates and spaced apart at intervals of 180 degrees. It is determined whether all signals transmitted from the sensing unit from the first transmitting unit installed in the first receiving unit and the second transmitting unit installed in the second receiving unit to the sensing unit, reflected on the contact surface, and returning to the sensing unit through the transmitting unit are detected.

The calculation unit 65 determines the spindle and the tool clamped to the spindle through the verification result of the verification unit 62 , the detection result of the detection unit 63 , the determination result of the determination unit 64 , and the data stored in the data storage unit 61 . Calculate the adhesion distance of That is, the calculation unit 65 transfers the signal to the contact surface between the spindle and the tool when the position where the receiving unit is formed by the sensing unit passes through the sensing unit during rotation of the spindle and the transmitting unit receives a signal from the sensing unit, and then in close contact again. The transmission unit transmits the signal reflected from the surface to the sensing unit, and calculates the adhesion distance between the spindle and the tool by calculating the time from the first transmission from the sensing unit until it is reflected from the contact surface and received.

The comparison unit 66 compares the calculated adhesion distance calculated by the calculator 65 with the reference adhesion distance range stored in the data storage unit. That is, the comparison unit 66 compares the calculated adhesion distance between the current spindle and the tool calculated by the calculator and the reference adhesion distance range stored in the data storage unit according to the type and length of the tool.

The analysis unit 67 analyzes the comparison result of the comparison unit 66 to determine whether the clamp of the tool is normal or not. In other words, the analysis unit classifies the case before and during processing, analyzes the comparison result of the comparison unit to determine whether the clamp of the tool is normal, and generates an alarm when there is an abnormality and informs the operator to prevent equipment damage or workpiece damage. , to prevent wastage of resources.

Specifically, the analysis unit generates a machining signal when the comparison result of the comparison unit before machining the workpiece and the calculated adhesion distances in all transfer units are within the standard adhesion distance range, and the calculated adhesion distances in one or more transfer units are the reference adhesion distance If the range is exceeded, a clamp error signal is generated. If the calculated adhesion distance in all transmission units exceeds the standard adhesion distance range, an equipment error signal is generated, and the calculated adhesion distance in one or more transfer units is the standard If the contact distance is less than the range, a setting error signal is generated.

In addition, the analysis unit generates an equipment check signal when the calculated adhesion distance in one or more transfer units exceeds the reference adhesion distance range as a result of the comparison of the comparison unit while the workpiece is being processed.

In this way, the tool clamp confirmation device according to the present invention transmits a signal from the sensing unit to the transmitting unit installed in the receiving unit by the control unit and clamps the tool to the spindle and the spindle according to the time the sensing unit receives the signal returning through the transmitting unit. By calculating the close contact distance of the tool, the clamping of the tool clamped on the spindle is checked automatically, precisely and quickly in real time, not only before machining the workpiece, but also during machining, thereby preventing the vibration of the tool and matching the concentricity to improve the machining precision of the machine tool. By maximizing it, it reduces the occurrence of defective products and prevents wastage of resources, improves the stability and reliability of the machine tool, increases the productivity of the machine tool by minimizing the non-working time, reduces the overall manufacturing cost and maintenance cost of the machine tool, and The convenience of the operator can be promoted by automatically and accurately and quickly checking whether the clamp is normal in real time before and during processing.

A tool clamp confirmation method according to the present invention will be described with reference to FIG. 3 . As shown in FIG. 3 , the tool clamp confirmation method includes a data storage step (S1), a confirmation step (S2), a detection step (S3), a determination step (S4), a calculation step (S5), a comparison step (S6), and analysis Step S7 is included. The overall operating principle, control method, and equipment configuration of the frame clamp confirmation method according to the present invention are the same as the tool clamp confirmation apparatus according to the present invention described above. Hereinafter, the differences will be mainly described.

Data for calculating the adhesion distance between the spindle and the tool clamped to the spindle is stored in the data storage unit 61 to confirm in real time whether the tool clamped on the spindle is normal or not. Specifically, in the data storage unit, the processing program, the number of receptacles formed through the spindle, position data of the receptacles spaced apart at a certain angle around the rotation axis of the spindle, tool data on the type and length of the tool, and the calculation adhesion distance and standards for comparison The close contact distance range data is stored by the user through the main operation unit, PLC or display unit of the control unit.

After the data storage step (S1), the checking unit 62 checks the type of tool clamped to the spindle and the presence or absence of processing. That is, depending on the type of tool clamped to the spindle, the reference contact distance range data can be changed and checked, and the analysis result of the analysis section can be changed depending on whether the workpiece is being processed or before machining, and the confirmation section confirms this. In addition, the confirmation unit confirms a signal for the operation of the automatic clamping confirmation mode function of the tool according to the type of the tool and the number and position of the receptacle through the selection unit. That is, if the user does not activate the tool clamp automatic confirmation mode function through the selection unit, the tool clamp automatic confirmation process is not performed.

After the confirmation step (S2), the detection unit 63 detects the signal of the sensing unit when the sensing unit coincides with the transmission unit installed in the receiving unit by the sensing unit when the spindle rotates. That is, a sensing unit such as an encoder accurately senses the rotational position of the spindle, and when the transmission unit and the sensing unit installed in the receiving unit coincide with the rotation of the spindle by the number and position data of the receiving unit pre-stored in the data storage unit, it is transmitted through a signal. The sensing unit emits signals such as lasers and infrared rays to the transmitting unit, and receives the signals reflected from the contact surfaces of the tool and the spindle and detects them.

After the detection step (S3), the determination unit 64 determines whether signals are detected from all transmission units respectively installed in the receiving unit. If no signal is detected from all the transmission units in the judgment unit, an abnormal alarm is generated to prevent malfunction, save maintenance cost and time, improve productivity by reducing non-working time, and promote operator convenience can do.

After the determination step (S4), the calculation unit 65 clamps the spindle and the spindle with the result of the confirmation step, the detection result of the detection step, the determination result of the determination step, and the data pre-stored in the data storage section in the data storage step. Calculate the adhesion distance of the tool. Specifically, the contact distance between the spindle and the tool is calculated by calculating the time taken to emit a signal from the sensing unit and receive the reflected signal from the transmission unit.

After the calculation step (S5), the comparison unit compares the calculated adhesion distance calculated as a result of the calculation in the calculation step in the comparison unit 66 and the reference adhesion distance range pre-stored in the data storage unit.

After the comparison step (S6), the analysis unit 67 analyzes the comparison result to determine in real time whether the clamp of the tool is normal or not, and if there is an abnormality, an alarm is generated.

Specifically, in the case of before machining the workpiece in the analysis step (S7), a machining signal is generated when the calculated adhesion distance in all transfer units is within the reference adhesion distance range as a result of comparison of the comparison unit, and the calculated adhesion distance in one or more transfer units When is out of the standard contact distance range, a clamp error signal is generated, and when the calculated adhesion distance in all transmission units exceeds the standard contact distance range, an equipment error signal is generated, and calculation in one or more transmission units If the adhesion distance is less than the standard adhesion distance range, a setting error signal is generated.

In addition, in the case of processing the workpiece in the analysis step (S7), the comparison result of the comparison unit generates an equipment check signal when the calculated adhesion distance in one or more transfer units exceeds the reference adhesion distance range.

As such, the tool clamp confirmation method according to the present invention transmits a signal from the sensing unit to the transmission unit installed in the receiving unit by the control unit, and the sensing unit receives the signal returning through the transmission unit, depending on the time the sensing unit receives the spindle and the tool clamped on the spindle. By calculating the close contact distance of the tool, the clamping of the tool clamped on the spindle is checked automatically, precisely and quickly in real time, not only before machining the workpiece, but also during machining, thereby preventing the vibration of the tool and matching the concentricity to improve the machining precision of the machine tool. By maximizing it, it reduces the occurrence of defective products and prevents wastage of resources, improves the stability and reliability of the machine tool, increases the productivity of the machine tool by minimizing the non-working time, reduces the overall manufacturing cost and maintenance cost of the machine tool, and The convenience of the operator can be promoted by automatically and accurately and quickly checking whether the clamp is normal in real time before and during processing.

Although the detailed description of the present invention described above has been described with reference to a preferred embodiment 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: clamp check device, 10: spindle,
20: receiving unit, 30: transmitting unit,
40: sensing unit, 50: sensing unit,
60: control unit, 61: data storage unit,
62: confirmation unit, 63: detection unit,
64: judgment unit, 65: calculation unit,
66: comparison unit, 67: analysis unit,
70: Air blower unit.

Claims (7)

spindle clamping tool;
a receiving part extending from the inside of the spindle to a front end of the spindle in the direction of the rotation axis and the other end extending to a front end in the radial direction of the spindle;
a sensing unit installed on a part of the spindle so as to be adjacent to the other side of the receiving unit to transmit and receive a signal;
a transmitting unit installed inside the receiving unit to transmit a signal transmitted from the sensing unit;
a sensing unit installed in a portion of the spindle in the direction of the rotation axis to sense the rotation position of the spindle; and
Tool clamp comprising a; verification device.
According to claim 1,
A plurality of the receiving portions are formed inside the spindle to be spaced apart from each other at a predetermined angle with respect to the axis of rotation of the spindle,
The transfer unit is a tool clamp confirmation device, characterized in that each is installed in all of the receiving unit formed in plurality.
According to claim 1,
The accommodating part is a tool clamp confirmation device, characterized in that formed through the inside of the spindle in a diagonal or L-shape.
According to claim 1,
Tool clamp confirmation device further comprising; an air blower for supplying air between the sensing unit and the other side of the receiving unit.
3. The method of claim 2,
The control unit is
a data storage unit for storing a processing program, the number of the receiving units, position data of the receiving units, tool data, and reference contact distance range data;
a confirmation unit for confirming the type of tool clamped to the spindle and the presence or absence of processing;
a detection unit configured to detect a signal of the sensing unit when the transmitting unit installed in the receiving unit by the sensing unit coincides with the sensing unit when the spindle rotates;
a determination unit for determining whether a signal is detected from all the transmitting units installed in the receiving unit from the detecting unit;
a calculation unit for calculating a contact distance between the spindle and the tool clamped to the spindle based on the verification result of the verification unit, the detection result of the detection unit, the determination result of the determination unit, and the data stored in the data storage unit;
a comparison unit for comparing the calculated adhesion distance calculated by the calculator with a reference adhesion distance range stored in the data storage unit; and
and an analysis unit that analyzes the comparison result of the comparison unit to determine whether the tool clamp is normal or not.
6. The method of claim 5,
The analysis unit,
Before machining the workpiece, a machining signal is generated when the calculated adhesion distance from all transfer parts is within the standard adhesion distance range. When the calculated adhesion distance from all transmission units exceeds the standard adhesion distance range, an equipment error signal is generated. occurs,
Tool clamp confirmation device, characterized in that the equipment check signal is generated when the calculated adhesion distance from one or more transfer units exceeds the standard adhesion distance range during workpiece processing.
Calculating the adhesion distance between the spindle and the tool clamped to the spindle, and storing data for checking in real time whether the tool is clamped on the spindle in real time;
checking the type of tool clamped to the spindle and the presence or absence of processing;
detecting a signal of the sensing unit when the transmitting unit installed in the receiving unit and the sensing unit coincide with each other by the sensing unit when the spindle rotates;
determining whether a signal is detected from all the transfer units installed in the receiving unit, respectively;
calculating an adhesion distance between the spindle and the tool clamped to the spindle based on the confirmation result, the detection result, the determination result, and pre-stored data;
comparing the calculated adhesion distance calculated as a result of the calculation with a pre-stored reference adhesion distance range; and
and an analysis step of analyzing the comparison result to determine in real time whether the tool clamp is normal or not.

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