摘要:
A method and apparatus for determining wear and tear in machines includes a method that determines a voltage draw and/or a current draw of a first subsystem of the machine during its operation, and wear and tear present in a second machine subsystem is determined based on the draw determined in the first subsystem. In one embodiment, a coal grinding machine includes a drive, a coal grinding mill driven by the drive, a device for determining an electrical draw of a current and/or voltage draw of the drive during operation, and a device for inferring wear and tear present in the coal grinding mill on the basis of voltage and/or current draw determined in the drive. The machine can include a device for inferring the quality or type of material (like coal) being processed in the mill based on the draw determined in the drive.
摘要:
A motor control apparatus for computing or outputting motor load information, comprises: a storage unit which stores a function or table obtained in advance based on parameters used for the computation of the load information and on an actually measured value of a motor output or motor torque; and a load meter computing unit which computes the load information from the function or table stored in the storage unit by using the parameters used for the computation of the load information. With the above configuration, the load meter is computed in such a manner as to accurately indicate the load condition of a motor in real time over the entire speed range of the motor including the nonlinear control region of the motor, and the motor is controlled using the thus computed value or the computed value is displayed on a display unit.
摘要:
A method and apparatus for determining wear and tear in machines includes a method that determines a voltage draw and/or a current draw of a first subsystem of the machine during its operation, and wear and tear present in a second machine subsystem is determined based on the draw determined in the first subsystem. In one embodiment, a coal grinding machine includes a drive, a coal grinding mill driven by the drive, a device for determining an electrical draw of a current and/or voltage draw of the drive during operation, and a device for inferring wear and tear present in the coal grinding mill on the basis of voltage and/or current draw determined in the drive. The machine can include a device for inferring the quality or type of material (like coal) being processed in the mill based on the draw determined in the drive.
摘要:
The invention provides a NC unit provided with an ultrasonically oscillating tool, capable of indenting pits at equal pitches and detecting an amount of wastage of a stylus. In the NC unit, a PLL circuit outputs an ultrasonic signal S at a frequency equivalent to the resonant frequency of the ultrasonically oscillating tool and the frequency of the output signal S undergoes changes following up any change in the resonant frequency due to wear and tear of the stylus. Accordingly, the frequency of the output signal S has a value corresponding to the amount of wastage of the stylus. A frequency detection circuit 40 detects the frequency of the output signal S, and delivers data indicating the frequency to a CPU. When applying a process for indenting pits at equal pitches, the CPU changes over a synchronizing/changeover circuit so as to deliver the output signal S from the PLL circuit to an interpolative operation circuit. This will cause traveling velocities of respective motors to be synchronized with an oscillation speed of the stylus of the ultrasonically oscillating tool thus enabling indentation of the pits at equal pitches.
摘要:
A method for automated condition monitoring whereby techniques of automated vibration analysis and signal processing are combined with deep learning/machine learning techniques for an enhanced system of automated anomaly detection, problem classification, and problem regression. The method may be implemented in software, firmware or hardware to run autonomously. Machines monitored and analyzed according to the disclosed method are typically found in industrial plants or commercial applications, but the disclosed invention may be applied to any rotating equipment such as motors, fans, pumps, compressors, and etc., in any environment where they are functioning.
摘要:
The wear status of a micro-endmill tool may be inferred by monitoring the chip production rate of the tool in operation. Chips may be extracted from a work area, captured on an adhesive surface, imaged, and counted to determine the chip production rate. When the rate of chip production falls, the feed rate of the micro-endmill may be increased to a level suitable for the current state of tool wear. In this manner, costly and inconvenient work stoppages to evaluate the wear status of a tool are eliminated.
摘要:
A tool management method, when performing machining using a Numerical Control (NC) program, searches for cutting tool status information obtained as a result of having performed a machining simulation based on tool information, cutting condition information and the NC program, and on the other hand, actually measures tool wear at the time of actual cutting, estimates the tool wear from each of the items of information described above and judges permission to use a tool.
摘要:
Method and apparatus for the contactless monitoring of a working tool for breakage or wear, the tool being installed in a machine having at least two parts, with one of the parts being stressed by forces imposed on the working tool during machine operation, by: inductively monitoring the position of the one part relative to the other of the two parts during machine operation to produce at least one induced voltage representative of a change in relative position; determining the value of the induced voltage; and emitting a signal when a predetermined change occurs in the value of the induced voltage.
摘要:
A system is provided for predicting when the failure of a rotating machineool or part is imminent or when a tool is worn. The system includes a transducer for producing an output related to the workpiece vibrations caused by the machine tool and an analog comparator which compares this output with a threshold signal related to the normal operation of the tool and established by a microcomputer which determines whether further signals which exceed the threshold are produced during each of a predetermined number of subsequent time intervals related to the rotational speed of the tool. If so, a "failure" signal is produced which may be used, for example, to cause retraction of the tool.
摘要:
The wear status of a micro-endmill tool may be inferred by monitoring the chip production rate of the tool in operation. Chips may be extracted from a work area, captured on an adhesive surface, imaged, and counted to determine the chip production rate. When the rate of chip production falls, the feed rate of the micro-endmill may be increased to a level suitable for the current state of tool wear. In this manner, costly and inconvenient work stoppages to evaluate the wear status of a tool are eliminated.