KR20150089722A - Apparatus and method for diagnosing trouble of machine tool using power consumption - Google Patents

Abstract

An embodiment of the present invention relates to an apparatus and a method for diagnosing a trouble of a machine tool using power consumption. The apparatus for diagnosing a trouble of a machine tool using power consumption comprises: a data storing unit storing a normal consumed power pattern in a normal operation section of a machine tool and an abnormal consumed power pattern in an abnormal operation section; an operation testing unit setting the machine tool according to a machine tool program for an operation test and operating the set machine tool with respect to a transfer shaft or a rotating shaft; a consumed power measuring unit measuring consumed power of the machine tool operated by the operation testing unit depending on a change in measurement time; a consumed power analyzing unit which determines a normal operation or an abnormal operation by comparing the measured consumed power of the machine tool with the stored normal consumed power pattern and confirming whether the measured consumed power of the machine tool corresponds to the abnormal power, and determines whether the power level of the machine tool is abnormally operated or not with respect to the malfunction line at the time of the abnormal operation; and an output unit outputting the measured consumed power and an abnormal diagnosis result of the determined normal operation or abnormal operation.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and method for diagnosing a machine tool failure,

TECHNICAL FIELD [0001] The present invention relates to an apparatus and method for diagnosing a machine tool failure using power consumption.

A machine tool is a machine that processes a material to produce a desired shape. Such machine tools are assemblies of numerous components that use electrical energy as a power source. The machine tool is composed of a rotary part that can move at a desired speed to accurately process the material and a transfer part that can be transported to the correct position.

In addition to these drive systems, peripheral components that make up a machine tool also operate using electrical energy. These components, which convert electrical energy into mechanical energy form, are forced to have a certain loss by the process of energy conversion. This loss can be expressed as efficiency in the form of input versus output. When the machine tool breaks down or becomes old, the loss generally increases and the output may decrease.

The speed and position of the driven parts of the machine tool are determined in a manner that operates according to the instructions of the numerical control (NC) code. At this time, the output is fixed and the input is variable. Particularly, parts such as spindle motors consume a lot of electrical energy until reaching the commanded speed. The machine tool is forced to use more energy in order to perform the same exercise if the related system is not a simple failure but the machine is worn or aged. It is not possible to grasp a failure phenomenon due to wear and deterioration of the drive system simply by a conventional method of simply measuring the amount of electric power accumulation and a simple electrical inspection such as phase balance inspection.

Conventionally, in order to diagnose a failure of a component of a machine tool, the user visually checks the part or detects noise and vibration different from usual. In addition, through the A / S of the machine tool maker, parts considered to be malfunctions were directly disassembled to judge whether or not the malfunction occurred.

Machine tools, however, consist of many parts and work simultaneously. Due to the operating characteristics of the workplace and the machine tool where the machine tool is installed, a lot of noise and vibration exist simultaneously. Therefore, there is a limit to accurately judging a part showing a failure and an abnormal state by using the human sense of the five. And the cost of labor for disassembling and assembling the system of the part and the loss cost for the delay of the work.

In some embodiments of the present invention, the power consumption of the machine tool is measured not only by the concept of the accumulation amount but also by the power consumption pattern for each drive system, and comparing the measured power consumption of each drive system with the normal operation pattern or the abnormal operation pattern An apparatus and method for diagnosing a machine tool using power consumption capable of diagnosing a failure of each drive system.

An apparatus according to an embodiment of the present invention includes a data storage unit for storing a normal power consumption pattern in a normal operation interval of the machine tool and an abnormal power consumption pattern in an abnormal operation interval; A driving test section for setting a machine tool according to a machine tool program for driving test and driving the set machine tool with respect to a transfer shaft or a rotary shaft; A power consumption measuring unit for measuring the power consumption of the machine tool driven by the drive test unit according to a change in measurement time; The normal operation or the abnormal operation is determined by comparing the power consumption of the measured machine tool with the stored normal power consumption pattern or by checking whether the power consumption of the measured machine tool corresponds to the abnormal waveform, A power consumption analyzer for determining whether an abnormal operation of the power hierarchy of the machine tool is performed for each failure system; And an output unit for outputting the measured power consumption and the diagnostic result of the determined normal operation or abnormal operation.

The driving test section divides the minimum or maximum speed of the machine tool in a stepwise manner or a decelerating speed or a constant speed with respect to a transfer axis or a rotational axis of the machine tool, To the maximum feed distance.

The power consumption analyzing unit may store a failure diagnosis result for a normal operation or an abnormal operation for each of the determined failure systems and a normal power consumption pattern or an abnormal power consumption pattern according to each operation in the data storage unit for each failure system.

The power consumption analyzing unit may determine that the abnormal operation is performed if the difference between the measured power consumption of the machine tool and the stored normal power consumption pattern exceeds a reference value set differently for each type of machine tool.

Wherein the power consumption analyzing unit uses the power consumption measured for each input terminal of the drive system by the power consumption measuring unit to perform an abnormal operation by a drive system for a rotation axis corresponding to a plurality of spindle motors or a transfer axis corresponding to a plurality of servo motors It can be judged.

According to another aspect of the present invention, there is provided a method for driving a machine tool, the method comprising: setting a machine tool according to a machine tool program for driving test and driving the set machine tool with respect to a transfer shaft or a rotary shaft; Measuring a power consumption of the machine tool when the set machine tool is driven and generating a power consumption pattern corresponding to a change in the measurement time using the measured power consumption; A normal operation or an abnormal operation is determined by comparing the power consumption of the measured machine tool with a previously stored normal power consumption pattern or by checking whether the power consumption of the measured machine tool corresponds to an abnormal waveform, Determining whether an abnormal operation of the power hierarchy diagram of the machine tool is performed for each failure system; And outputting the measured power consumption and the diagnostic result of the determined normal operation or abnormal operation.

The method may further include storing a fault diagnosis result for normal operation or abnormal operation for each fault system and a normal power consumption pattern or an abnormal power consumption pattern for each fault system according to each operation, The normal operation or the abnormal operation may be determined using the normal power consumption pattern or the abnormal power consumption pattern according to each operation stored in the storing step.

Wherein the step of driving comprises the steps of driving the machine tool at an acceleration / deceleration or a constant speed by dividing the minimum or maximum speed of the machine tool in a stepwise manner; And a minimum to maximum transport distance in a positive (+) and negative (-) direction for each transport axis of the machine tool.

The determining step may be determined as an abnormal operation if the difference between the measured power consumption of the machine tool and the stored normal power consumption pattern exceeds a reference value differently set for each type of machine tool.

Wherein the determining is performed by using the power consumption measured by the power consumption measuring unit for each of the input terminals of the drive system to perform an abnormal operation for each drive system with respect to the rotation axis corresponding to the plurality of spindle motors or the transfer axis corresponding to the plurality of servomotors It can be judged.

According to some embodiments of the present invention, a numerical control code for a driving test set on a machine tool is executed to execute a driving test, and the power consumption of the driving system measured during the driving test is compared with the power consumption pattern of the normal or abnormal operation stored in advance It is possible to grasp the presence or absence of an abnormality in the drive system so that the maintenance and repair can be advantageous and the after-service of the machine tool can be facilitated.

In addition, according to some embodiments of the present invention, when a failure of each driving system of the machine tool is diagnosed, the abnormal power consumption pattern for the case is converted into a database, and the power system of the driving system It is possible to diagnose faults to detailed parts.

In addition, the fault diagnosis apparatus according to some embodiments of the present invention can be installed directly on a machine tool, and a fault can be diagnosed for each drive system of the power hierarchy regardless of the type of the machine tool.

1 is a block diagram of a fault diagnosis apparatus for a machine tool using power consumption according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating a driving test procedure for a rotary shaft and a feed shaft of a machine tool according to an embodiment of the present invention.
3 is an explanatory diagram illustrating a process of comparing a power consumption of the machine tool with a normal power consumption pattern according to an embodiment of the present invention.
4 is an explanatory diagram of a drive system for a power hierarchy diagram in a machine tool according to an embodiment of the present invention.
5 is a flowchart illustrating a method for diagnosing a failure of a machine tool using power consumption according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the embodiments, descriptions of techniques which are well known in the technical field to which this specification belongs and which are not directly related to this specification are not described. This is for the sake of clarity without omitting the unnecessary explanation and without giving the gist of the present invention.

For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated. Also, the size of each component does not entirely reflect the actual size. In the drawings, the same or corresponding components are denoted by the same reference numerals.

1 is a block diagram of a fault diagnosis apparatus for a machine tool using power consumption according to an embodiment of the present invention.

1, the apparatus for diagnosing a machine tool failure 100 according to an embodiment of the present invention includes a drive test unit 110, a power consumption measurement unit 120, a power consumption analysis unit 130, (140) and an output unit (150). Here, the components of the fault diagnosis apparatus 100 may be installed or attached to a machine tool. The user can attach the fault diagnosis apparatus 100 to the machine tool for power consumption measurement and analysis. If the fault diagnosis apparatus 100 attached to the machine tool does not perform the power consumption measurement and analysis function, the machine tool can perform a general machining operation.

Here, the machine tool is composed of a number of driving parts and control devices. Such parts of the machine tool are affected by friction, vibration, heat and collision, which are inevitably caused by the operation, and the wear proceeds. Further, as the excessive operation of the parts accumulates, malfunction symptoms such as breakage of the specific parts may occur. As a result, each part may exhibit abnormal symptoms or decrease in exercise efficiency and tend to consume more energy to perform the same operation.

Therefore, the apparatus 100 for diagnosing a machine tool failure according to an embodiment of the present invention measures the power consumption of each driving system according to the energy consumption tendency and stores the measured power consumption in a predetermined normal power consumption pattern or abnormal power consumption pattern It is possible to diagnose the failure of each of the driving systems of the machine tool.

Hereinafter, each of the components of the apparatus 100 for diagnosing a machine tool according to an embodiment of the present invention will be described.

The drive test section 110 sets a machine tool in accordance with a machine tool program for driving test and drives the machine tool to a transfer shaft or a rotary shaft. Here, the drive test section 110 sets the machine tool in accordance with the numerical control (NC) program for drive system drive test, and executes the drive test. The drive system test drive NC program of the drive test section 110 can be installed at the factory shipment of the machine tool. Also, it is possible to install if the corresponding NC program does not exist. At this time, the program security function can be applied so that the user can not arbitrarily modify the program for safe driving test of the machine tool. The machine tool can be set automatically according to the basic settings of the NC program. In addition, the user can set the machine tool condition suitable for the desired drive test according to the setting manual. The driving test section 110 executes the driving test when the setting is completed.

The drive test section 110 can drive the feed shaft or the rotary shaft of the machine tool at an acceleration / deceleration or a constant speed by dividing the minimum to maximum speed in stages. The drive test section 110 can be driven with a minimum to maximum feed distance in the positive and negative directions for each feed axis of the machine tool.

The power consumption measuring unit 120 measures the power consumption of the machine tool driven by the drive test unit 110 according to the change in the measurement time. The power consumption measuring unit 120 operates at the same time as the driving test unit 110. The power consumption measuring unit 120 measures the power consumption during the driving test and stores the measured power in the data storage unit 140 or the memory.

The energy consumption for the drive system, that is, the power consumption can be expressed electrically and mechanically as shown in the following equation (1).

Where P is the power consumption (motor output), V is the input voltage, I is the input current, T is the torque of the motor, w is the rotational speed of the motor, and?

Power consumption is generally expressed as the product of voltage and current. However, the power consumption can be expressed mechanically by multiplying the motor torque and rotation speed by the mechanical efficiency. That is, as machine efficiency drops, more power is consumed to achieve the same torque and rotational speed. Based on this viewpoint, the power consumption analyzing unit 130 can perform power consumption and failure diagnosis of the driving parts of the machine tool by measuring and analyzing the power consumption of the machine tool.

The power consumption analysis unit 130 compares the power consumption of the machine tool measured by the power consumption measurement unit 120 with the normal power consumption pattern stored in the data storage unit 140 to determine a normal operation or an abnormal operation. The power consumption analyzing unit 130 determines whether the power consumption of the machine tool measured by the power consumption measuring unit 120 corresponds to the abnormal waveform and determines whether the normal operation or the abnormal operation is performed. Specifically, the power consumption analysis unit 130 determines whether the difference between the power consumption of the machine tool, measured by the power consumption measurement unit 120, and the normal power consumption pattern stored in the data storage unit 140, , It can be judged as an abnormal operation.

Here, A represents a previously stored power consumption value, and B represents a power consumption value measured during a driving test.

The power consumption analysis unit 130 can compare the power consumption measured in accordance with Equation (2) with the normal power consumption pattern stored in advance. At this time, the power consumption measuring unit 120 stores the measured power consumption value in the driving test according to the change over time. This pattern is assumed to be B.

The power consumption analysis unit 130 compares the power consumption pattern B with the power consumption pattern A stored in the data storage unit 140 and determines whether the absolute value of the power consumption pattern A exceeds a% When an abnormal waveform is detected, it is judged as an abnormal operation. At this time, α% is a reference value that can be judged as failure and aging, and it may be different according to equipment of the machine tool.

If it is determined that the operation is abnormal, the power consumption analysis unit 130 determines whether the operation of the power hierarchy of the machine tool is abnormal according to the failure system.

The power consumption analyzing unit 130 uses the power consumption measured by the power consumption measuring unit 120 for each input terminal of the driving system to drive the rotating shaft corresponding to the plurality of spindle motors or the driving shaft corresponding to the plurality of servomotors It is possible to judge abnormal operation for each system. To this end, the power consumption measuring unit 120 is connected to the input terminal of the driving system in the power hierarchy and can measure the power consumption pattern for each connected input terminal.

The output unit 150 outputs the power consumption pattern measured by the power consumption measurement unit 120 and the failure diagnosis result for the normal operation or the abnormal operation determined by the power consumption analysis unit 130. The output unit 150 may output a notification of the failure diagnosis result to the user in advance before outputting the failure diagnosis result. Then, the user can check detailed diagnosis results after the notification.

Thereafter, the power consumption analyzing unit 130 outputs a failure diagnosis result for normal operation or abnormal operation determined for each failure system and a normal power consumption pattern or an abnormal power consumption pattern according to each operation in the data storage unit 140 for each failure system Additional storage is possible.

The data storage unit 140 includes an abnormal operation DB 141 in which an abnormal power consumption pattern is stored and a normal operation DB 142 in which a normal power consumption pattern is stored. The data storage unit 140 stores the normal power consumption pattern in the normal operation section of the machine tool and the abnormal power consumption pattern in the abnormal operation section. The data storage unit 140 may store a drive test result of the machine tool at the time of shipment from the factory. The data storage unit 140 may store data determined as a normal operation of the power consumption pattern. In addition, the data storage unit 140 may store data determined as a failure and an abnormal operation.

Meanwhile, when the power consumption analyzing unit 130 and the data storage unit 140 are connected through a network, the power consumption analyzing unit 130 stores the abnormal power consumption pattern of the failed component in the data storage unit 140 send. The data storage unit 140 stores the received abnormal power consumption pattern in a database. The stored abnormal power consumption pattern can be used if the after-sales service is required in the future. Also, the power consumption analysis unit 130 transmits the normal power consumption pattern of the normal parts to the data storage unit 140 using the network. The data storage unit 140 stores the received normal power consumption pattern in a database. The stored normal power consumption pattern can be used if the after-sales service is required in the future.

Meanwhile, the power consumption analysis unit 130 compares the power consumption measured in the driving test with the normal power consumption pattern stored in the data storage unit 140, and if the difference value is within the normal range, the normal power consumption pattern is stored in the normal operation DB 141). Also, the power consumption analysis unit 130 can store the abnormal power consumption pattern in the abnormal operation DB 142 when the difference value is within the abnormal range.

FIG. 2 is an explanatory diagram illustrating a driving test procedure for a rotary shaft and a feed shaft of a machine tool according to an embodiment of the present invention.

As shown in FIG. 2, the drive test section 110 can drive the rotary shaft 201 of the machine tool in the -Z-axis direction at an acceleration / deceleration or a constant speed by dividing the rotational speed in stages.

The drive test section 110 measures the tool 202 of the machine tool by a minimum to a maximum feed distance in the positive and negative directions with respect to the origin according to the feed axes including the X axis, the Y axis, and the Z axis Can be driven.

3 is an explanatory diagram illustrating a process of comparing a power consumption of the machine tool with a normal power consumption pattern according to an embodiment of the present invention.

As shown in FIG. 3, the power consumption measuring unit 120 measures the power consumption 302 in accordance with the change in the processing time during the driving test. The power consumption measuring unit 120 measures the power consumption of the machine tool in the form of a power consumption pattern for each drive system, rather than simply a concept of a cumulative amount.

The power consumption analysis unit 130 analyzes the difference 311 between the power consumption 302 measured by the power consumption measurement unit 120 and the normal power consumption pattern 301 stored in the data storage unit 140.

4 is an explanatory diagram of a drive system for a power hierarchy diagram in a machine tool according to an embodiment of the present invention.

The machine tool may be configured according to the drive system for the power hierarchy diagram of FIG. The machine tool includes a power supply module (400) connected to the main power (40). The power supply module 400 is connected to a spindle amplification module 410 for receiving and amplifying a signal from a driving system of the rotary shaft and a servo amplification module 420 for receiving and amplifying a signal from the driving system of the rotary shaft. Here, the spindle amplification module 410 is connected to the main spindle motor 411, the sub spindle motor 412, and the tool rotation spindle motor 413. The servo amplification module 420 is connected to the servo X motor 421, the servo Y motor 422, and the servo Z motor 423.

When the measured power consumption is determined to be an abnormal operation, the power consumption analyzing unit 130 can determine the driving system in which the failure occurs by grasping the power hierarchy as shown in FIG. The power consumption of the machine tool is hierarchical. The driving parts use the same input to divide the power in the spindle and the servomotor and use it for each feed and rotary axis. The power consumption measuring unit 120 measures the power consumption only at the input end of the driving system without using a plurality of measuring units using such a characteristic. Then, the power consumption analyzing unit 130 can measure the power consumption of each driving system by using the power consumption measured only at the input end of the driving system.

5 is a flowchart illustrating a method for diagnosing a failure of a machine tool using power consumption according to an embodiment of the present invention.

The data storage unit 140 stores the power consumption value A measured in the normal operation period of the machine tool (S502).

The data storage unit 140 stores the abnormal operation pattern and normal operation pattern of the machine tool in a database (S504).

The fault diagnosis apparatus 100 selects a machine tool to be a driving test target among a plurality of machine tools from a user. Here, the machine tool is provided with a power consumption analyzing apparatus (S506).

The fault diagnosis apparatus 100 confirms whether power consumption analysis is performed by the user (S508).

When the power consumption analysis is performed (S508), the drive test unit 110 sets the machine tool according to the drive system drive test NC program (S510). On the other hand, if the drive test section 110 does not perform the power consumption analysis, the machine tool is not set according to the drive system drive test NC program.

The drive test section 110 drives the set machine tool with respect to the transfer shaft or the rotary shaft to execute the drive test (S512). The drive test section 110 can drive the machine tool at a constant speed or at a constant speed by dividing the minimum or maximum speed of the machine tool by a step or a step. Also, the driving test section 110 can be driven with a minimum to maximum feed distance in the positive (+) and negative (-) directions for each feed axis of the machine tool.

The power consumption measuring unit 120 measures and stores the power consumption measurement value B of the machine tool when the machine tool is driven by the drive testing unit 110 according to the change of the measurement time at step S514.

The power consumption analyzing unit 130 compares the power consumption of the machine tool measured by the power consumption measuring unit 120 with a previously stored normal power consumption pattern or the power consumption of the machine tool measured by the power consumption measuring unit 120 It is determined whether the abnormal waveform corresponds to a normal operation or an abnormal operation (S516).

If it is determined that there is an abnormal operation (S516), the power consumption analysis unit 130 determines whether an abnormal operation of the power hierarchy of the machine tool is performed for each failure system (S518). Here, the power consumption analyzing unit 130 uses the power consumption measured for each input terminal of the driving system by the power consumption measuring unit 120 to measure the power consumption of the rotating shaft corresponding to the plurality of spindle motors or the feeding axis corresponding to the plurality of servomotors It is possible to determine an abnormal operation for each drive system.

The output unit 150 outputs a failure diagnosis result of the abnormal operation determined by the power consumption measuring unit 120 and the power consumption analyzing unit 130 to the user (S520).

The power consumption analysis unit 130 calculates a power consumption pattern of the faulty component corresponding to the fault system in the power hierarchy, stores the data in the data storage unit 140 via the network, and stores the data in a database (S522).

If it is determined that the normal operation is performed (S516), the output unit 150 outputs a failure diagnosis result for the normal operation determined by the power consumption and power consumption analysis unit 130 measured by the power consumption measurement unit 120 To the user (S524).

The power consumption analysis unit 130 calculates a normal power consumption pattern and stores it in the data storage unit 140 via the network and stores the data in a database (S526).

It will be appreciated that the combinations of blocks and flowchart illustrations in the process flow diagrams may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, so that those instructions, which are executed through a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing functions. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory The instructions stored in the block diagram (s) are also capable of producing manufacturing items containing instruction means for performing the functions described in the flowchart block (s). Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in the flowchart block (s).

In addition, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative implementations, the functions mentioned in the blocks may occur out of order. For example, two blocks shown in succession may actually be executed substantially concurrently, or the blocks may sometimes be performed in reverse order according to the corresponding function.

Herein, the term " part " used in this embodiment refers to a hardware component such as software or an FPGA or an ASIC, and 'part' performs certain roles. However, 'part' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and components may be further combined with a smaller number of components and components or further components and components. In addition, the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card.

It will be understood by those skilled in the art that the present specification may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present specification is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present specification Should be interpreted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is not intended to limit the scope of the specification. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: fault diagnosis apparatus 110: drive test section
120: power consumption measuring unit 130: power consumption analyzing unit
140: Data storage unit 150: Output unit
141: abnormal operation DB 142: normal operation DB
40: main power 400: power supply module
410: Spindle amplification module 420: Servo amplification module
411: Main spindle motor 412: Sub spindle motor
413: Tool rotating spindle motor 421: Servo X motor
422: Servo Y motor 423: Servo Z motor

Claims (10)

A data storage unit for storing a normal power consumption pattern in a normal operation section of the machine tool and an abnormal power consumption pattern in an abnormal operation section;
A driving test section for setting a machine tool according to a machine tool program for driving test and driving the set machine tool with respect to a transfer shaft or a rotary shaft;
A power consumption measuring unit for measuring the power consumption of the machine tool driven by the drive test unit according to a change in measurement time;
The normal operation or the abnormal operation is determined by comparing the power consumption of the measured machine tool with the stored normal power consumption pattern or by checking whether the power consumption of the measured machine tool corresponds to the abnormal waveform, A power consumption analyzer for determining whether an abnormal operation of the power hierarchy of the machine tool is performed for each failure system; And
An output unit for outputting the measured power consumption and the result of diagnosis of the normal operation or the abnormal operation,
And a power supply for supplying power to the machine. The method according to claim 1,
The drive test section
The method according to any one of claims 1 to 3, wherein a minimum or a maximum speed of the machine tool in a positive or negative direction is divided into a plurality of steps, The failure diagnosis apparatus of the machine tool. The method according to claim 1,
The power consumption analysis unit
Wherein the data storage unit stores the fault diagnosis results for the normal operation or the abnormal operation for each fault system and the normal power consumption pattern or the abnormal power consumption pattern for each fault in the data storage unit. The method according to claim 1,
The power consumption analysis unit
And determines that the abnormal operation is caused when the difference between the measured power consumption of the machine tool and the stored normal power consumption pattern exceeds a reference value set differently for each type of machine tool. The method according to claim 1,
The power consumption analysis unit
Wherein the power consumption measured by the power consumption measuring unit is used for each of the input terminals of the drive system to determine an abnormal operation of each of the drive systems with respect to the rotation axis corresponding to the plurality of spindle motors or the transfer axis corresponding to the plurality of servomotors Fault diagnosis device. Setting a machine tool according to a machine tool program for driving test and driving the set machine tool with respect to a transfer axis or a rotation axis;
Measuring a power consumption of the machine tool when the set machine tool is driven and generating a power consumption pattern corresponding to a change in the measurement time using the measured power consumption;
A normal operation or an abnormal operation is determined by comparing the power consumption of the measured machine tool with a previously stored normal power consumption pattern or by checking whether the power consumption of the measured machine tool corresponds to an abnormal waveform, Determining whether an abnormal operation of the power hierarchy diagram of the machine tool is performed for each failure system; And
Outputting the measured power consumption and a fault diagnosis result for the determined normal operation or abnormal operation;
Wherein the method comprises the steps of: The method according to claim 6,
Further comprising the step of storing a fault diagnosis result for the normal operation or the abnormal operation for each fault system and a normal power consumption pattern or an abnormal power consumption pattern for each fault system,
Wherein the step of determining for each failure system determines a normal operation or an abnormal operation using the normal power consumption pattern or the abnormal power consumption pattern according to each operation stored in the storing step. The method according to claim 6,
The step of driving
Driving at least one of a minimum speed and a maximum speed with respect to a conveying shaft or a rotating shaft of the machine tool in steps of acceleration / deceleration or constant speed; And
A minimum to maximum feed distance in a positive (+) and negative (-) direction for each feed axis of the machine tool,
The method comprising the steps of: The method according to claim 6,
The determining step
If the difference between the measured power consumption of the machine tool and the stored normal power consumption pattern exceeds a reference value differently set for each type of machine tool, the malfunction is diagnosed. The method according to claim 6,
The determining step
Wherein the power consumption measured by the power consumption measuring unit is used for each of the input terminals of the drive system to determine an abnormal operation of each of the drive systems with respect to the rotation axis corresponding to the plurality of spindle motors or the transfer axis corresponding to the plurality of servo motors Fault diagnosis method.

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