JP2010234464A - Abnormality detection method for turret type cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality detection method for a turret type cutting tool, for detecting the abnormality of the cutting tool with a high degree of accuracy. <P>SOLUTION: The abnormality detection method for a turret type cutting tool includes: at least one or more sensors fixed to the cutting tool on the rotating side of the turret; at least one or more power receivers for supplying power to the sensors; at least one or more signal transmitters for transmitting the signals of the sensors; a power transmitter fixed to the fixed part of the turret; a signal receiver for receiving the signals of the sensors; and an abnormality analysis device for analyzing the data received by the signal receiver. The power receivers and signal transmitters of the at least one or more sensors fixed to the cutting tool on the rotating side of the turret are disposed at positions facing to and coming close to the power transmitter and the signal receiver fixed to the fixed part of the turret during the rotation of the turret. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention prevents the outflow of defective products due to chipping of a cutting tool, wear of the cutting tool, etc., and proper determination of the replacement time of the cutting tool in cutting performed using a plurality of cutting tools on the turret. The present invention relates to a cutting tool abnormality detection method.

In a processing machine that cuts workpieces with a cutting tool, in order to prevent a reduction in processing accuracy due to wear of the cutting tool, the life of the cutting tool is set based on the measurement data of the workpiece that was actually cut, The cutting tool and the processing accuracy are managed by exchanging the cutting tool while the processing accuracy is in a stable range.

However, before the cutting tool is replaced, due to problems such as chipping of the cutting tool or increased wear of the cutting tool, the workpiece machining accuracy may deviate from the specified value. In that case, since all the subsequent parts will produce defective products, a device and a detection method for detecting the occurrence of abnormality due to chipping or wear of the cutting tool and warning that the abnormality has occurred have been devised. ing.

As a detection method disclosed in Japanese Patent Application Laid-Open Nos. 2006-130604 and 2006-258748, there is a method of diagnosing whether there is an abnormality in a blade or the like by detecting a cutting sound or vibration during cutting with a sensor. It has been. These methods fix the sensor to the tool post and analyze the sound and vibration detected by the sensor. Therefore, it is necessary to supply power to operate the sensor and send the measured precision signal to the abnormality analyzer. However, in the case of a turret type cutting tool base that is processed while exchanging a plurality of cutting tools such as a turret, a plurality of sensors and lines are required. In addition, since the turret changes the cutting tool while rotating, there is a problem that the wire of the sensor fixed to the cutting tool base rotates and is easily broken.

For this reason, a connector is fixed to each sensor attached to the rotating part so that the sensor wire is not disconnected, and the other side of the connector is attached to the front-rear drive device, and the sensor power and signals are transmitted and received by connecting them back and forth. The way to do it is taken.

Alternatively, a method in which a rotary joint using a slip ring is attached to the rotating part of the turret to transmit / receive sensor power and signals is also performed.

However, since the above method is installed inside the machine that performs the cutting process, a large amount of cutting oil is required, so it is necessary to take a waterproof measure, and since the contact part slides, the contact resistance is likely to fluctuate and noise is generated. Since it is easy to enter, there is a problem that a problem is likely to occur when sending precise data.

JP 2006-130604 A

JP 2006-258748 A

An object of the present invention is to provide a method for detecting an abnormality of a turret type cutting tool that can detect an abnormality of a cutting tool with high accuracy.

The present invention relates to an abnormality detection method for a turret type cutting tool, wherein at least one sensor fixed to the cutting tool on the turret turning side, at least one power receiver for supplying electric power to the sensor, At least one signal transmitter for transmitting signals, a power transmitter fixed to the turret fixing unit, a signal receiver for receiving sensor signals, and an anomaly analyzer for analyzing data received by the signal receiver Consists of.

Further, the power receiver and the signal transmitter of at least one sensor fixed to the cutting tool side of the turret turning unit are opposed to the power transmitter and the signal receiver fixed to the turret fixing unit when turning the turret. Place in close proximity.

Further, a signal amplifier is provided between the sensor and the signal transmitter and between the signal receiver and the abnormality analysis device to amplify the sensor signal and accurately transmit the signal.

As another method, at least one sensor fixed to the cutting tool on the turret turning side, at least one power receiver that supplies power to the sensor, and a wireless communication device that transmits a signal of the sensor, , A power transmitter fixed to the turret fixing unit, a wireless communication device that receives a sensor signal, and an abnormality analysis device that analyzes data received by the wireless communication device.

When processing is performed by turning a tool like a turret type cutting tool base, the power and signal of the sensor can be transmitted and received without contact, so there is no fear of wire breakage or leakage due to cutting oil.

In addition, by arranging the power receiver and the power transmitter and the signal transmitter and the signal receiver so as to face each other and close to each other, it is less affected by the external environment, and power and data can be accurately transmitted and received. Furthermore, by amplifying a weak signal of the sensor and transmitting / receiving it, it is possible to make it less susceptible to noise generated by the external environment.

Furthermore, a wireless communication device that converts the sensor signal into data and transmits it is provided in the turret turning unit, and at least one sensor signal is identified and received by the wireless communication device on the turret fixed side. It is not necessary to provide a transmitter and a plurality of signal receivers.

Explanatory drawing explaining the implementation method of this invention

An embodiment of the present invention will be described with reference to FIG.

The turret fixing side 1 is fixed to a lathe, and the cutting tool 3 approaches the cutting work when performing cutting. The turret turning side 2 is configured to turn at a predetermined angle with respect to the turret fixing side 1, and six blades can be exchanged at an angle of 60 degrees.

A sensor 4 for detecting an abnormality of the blade 3 is fixed to the turret turning side 2 near the fixing portion of the blade 3. The sensor 4 is a type of sensor that is analyzed by the abnormality analysis device 9, and includes a vibration sensor and a sound sensor.

The same number of power receivers 5 and signal transmitters 6 as the sensors are fixed to the turret turning unit 2 while being shifted by a specified angle, and a signal amplifier 10 is disposed between the sensors 4 and the signal transmitters 6.

On the turret fixing side 1, a power transmitter 7 and a signal receiver 8 are fixed on the turret turning portion side.

The power receiver 5 and the signal transmitter 6 on the turret swivel side 2 are fixed at positions facing and close to the positions of the power transmitter 7 and the signal receiver 8 on the turret fixing side 1, and transmit and receive power and signals in a contactless manner. To do.

The signal receiver 8 is connected to a signal amplifier 10 and an abnormality analysis device 9 (not shown). The abnormality analysis device 9 analyzes data collected by the sensor 4 and amplified by the signal amplifier 10.

Compared with the first embodiment, the signal transmitter 6 and the signal receiver 8 are configured such that the wireless communication device 11 is installed on both the turret fixing side 1 and the turret turning side 2 and the data collected by the sensor 4 is transmitted and received wirelessly. You can also At this time, each of at least one sensor 4 is provided with a number for identifying the sensor, so that data for each cutting tool can be identified.

The present invention detects a cutting tool chipping or wear of a cutting tool in cutting performed by using at least one cutting tool on a turret, and detects a cutting tool abnormality for properly determining the replacement time of the cutting tool. Although it relates to the detection method, it can also be used to prevent disconnection of the sensor in a jig for exchanging a plurality of chucks and cylinders into a turret type.

DESCRIPTION OF SYMBOLS 1 Turret fixed side 2 Turret turning side 3 Cutting tool 4 Sensor 5 Power receiver 6 Signal transmitter 7 Power transmitter 8 Signal receiver 9 Abnormality analysis device 10 Signal amplifier 11 Wireless communication device

Claims (4)

In the turret type cutting tool abnormality detection method, at least one sensor fixed to the turret turning side cutting tool, at least one power receiver supplying power to the sensor, and a sensor signal are transmitted. At least one signal transmitter, a power transmitter fixed to the turret fixing unit, a signal receiver that receives a sensor signal, and an abnormality analysis device that analyzes data received by the signal receiver An abnormality detection method for a turret type cutting tool characterized by The power receivers and signal transmitters of a plurality of sensors fixed to the cutting tool on the turret turning side are arranged at positions facing and close to the power transmitter and signal receiver fixed to the turret fixing part when the turret is turned. An abnormality detection method for a turret type cutting tool according to claim 1. The abnormality of the turret type cutting tool according to claim 1 or 2, wherein a signal amplifier is provided between the sensor and the signal transmitter and between the signal receiver and the abnormality analysis device to amplify the signal of the sensor. Detection method. At least one sensor fixed to the cutting tool on the turret turning side, at least one power receiver that supplies power to the sensor, a wireless communication device that transmits the sensor signal, and fixed to the turret fixing part An abnormality detection method for a turret type cutting tool, comprising: a power transmitter that has been configured; a wireless communication device that receives a sensor signal; and an abnormality analysis device that analyzes data received by the wireless communication device.