JPH03259707A - Wear detecting device for cutter bit - Google Patents

Wear detecting device for cutter bit

Info

Publication number
JPH03259707A
JPH03259707A JP5837190A JP5837190A JPH03259707A JP H03259707 A JPH03259707 A JP H03259707A JP 5837190 A JP5837190 A JP 5837190A JP 5837190 A JP5837190 A JP 5837190A JP H03259707 A JPH03259707 A JP H03259707A
Authority
JP
Japan
Prior art keywords
cutter
wear
rod
cutter bit
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5837190A
Other languages
Japanese (ja)
Inventor
Hiroaki Yamaguchi
山口 博明
Masahiko Yamamoto
正彦 山本
Kanji Shibatani
柴谷 寛治
Shoichi Sakanishi
坂西 昇一
Tetsuya Shinpo
新保 哲也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP5837190A priority Critical patent/JPH03259707A/en
Publication of JPH03259707A publication Critical patent/JPH03259707A/en
Pending legal-status Critical Current

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  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE:To accurately detect the wear of the cutter bit by providing a rod which moves forth and back along the cutter bit, a stroke detector for its forward movement detection, the natural ground arrival detector for the tip of the rod, and a wear computing element which uses its data. CONSTITUTION:A cutter head 14 is stopped at a reference position, an actuator 18 moves the rod 20 forward along the cutter bit 10, and the stroke detector 22 detects its forward movement quantity and inputs its detection signal to the wear computing element 26. When the tip of the rod 20 is pressed against the natural ground 16 to generate strain, the arrival detector 24 detects the strain and sends its detection signal to the computing element 26. The computing element 26 when receiving the detection signal reads the forward movement stroke quantity outputted by the detector 22 and compares the length of the cutter bit 10 obtained from the stroke quantity with its initial length to operate and displays the wear quantity of a display device 28.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、地中掘削機のカッタヒツトの摩耗量を検出す
るカッタビットの摩耗検出装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cutter bit wear detection device for detecting the amount of wear on a cutter hit of an underground excavator.

〔従来の技術] シールド掘削機などの地中掘削機による地中掘削は、掘
削作業の効率を高めるために、摩耗したカッタビットを
逸早く交換する必要かある。ところが、地中掘削機は、
地中を掘削するため、カッタビットの摩耗の程度を目視
することができない。
[Prior Art] When excavating underground using an underground excavator such as a shield excavator, it is necessary to quickly replace a worn cutter bit in order to improve the efficiency of excavation work. However, underground excavators
Since the excavation is done underground, it is not possible to visually check the degree of wear on the cutter bit.

そこで、従来は、第3図に示したように、カッタビット
10に孔12を形成し、この孔12に矢印の如く常時空
気圧や水圧を作用させておき、カッタビット10の摩耗
が孔12まで達して圧力が低下したことを検知して、カ
ッタビット10の使用限界を検出するようにしている。
Therefore, conventionally, as shown in FIG. 3, a hole 12 is formed in the cutter bit 10, and air pressure or water pressure is constantly applied to the hole 12 as shown by the arrow. The limit of use of the cutter bit 10 is detected by detecting that the pressure has decreased.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかし、従来の圧力の低下を検出してカッタビットの摩
耗を検知する方法は、圧力の低下が生ずるまでカッタビ
ット10の摩耗を検知できず、また圧力が低下した後の
摩耗量も検出することができない。このため、孔12の
深さをカソタビノト10の使用限界の深さにする必要が
あり、使用限界に達しないと摩耗を検知できないため、
カッタピットの手配等の事前準備をすることができず、
カッタピットの交換作業が遅れたりする問題があった。
However, the conventional method of detecting cutter bit wear by detecting a pressure drop cannot detect wear of the cutter bit 10 until a pressure drop occurs, and cannot detect the amount of wear after the pressure has dropped. I can't. For this reason, it is necessary to set the depth of the hole 12 to the maximum usable depth of the casotabinoto 10, and wear cannot be detected unless the usable limit is reached.
We were unable to make advance preparations such as arranging a cutter pit.
There was a problem that the replacement work of the cutter pit was delayed.

本発明は、上記従来技術の欠点を解消するためになされ
たもので、地中掘削機のカンタピッ1〜の摩耗量を正確
に検出することができるカッタピットの摩耗検出装置を
提供することを目的としている。
The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional techniques, and an object of the present invention is to provide a cutter pit wear detection device that can accurately detect the wear amount of cutter pits 1 to 1 of an underground excavator. It is said that

〔課題を解決するための手段〕[Means to solve the problem]

上記の目的を達成するために、本発明の第1に係るカッ
タピットの摩耗検出装置は、地中掘削機に設けられ、カ
ッタピットに沿ってロッドを進退させるアクチュエータ
と、前記ロッドの前進量を検出するストローク検出器と
、前記ロッドの先端が地山に到達したことを検知する到
達検出器とを有することを特徴としている。
In order to achieve the above object, a cutter pit wear detection device according to a first aspect of the present invention is provided in an underground excavator, and includes an actuator that advances and retreats a rod along a cutter pit, and an actuator that measures the amount of advance of the rod. It is characterized by having a stroke detector for detecting, and a reach detector for detecting that the tip of the rod has reached the ground.

また、本発明の第2は、カッタピッ1−の後端部に取り
付けた超音波発信器と、前記カッタヒ・ントの後端部に
取り付けられ、前記超音波発信器が発信した超音波の反
射波を受信する超音波受信器と、前記超音波発信器が超
音波を出力した時間と前記超音波受信器が受信した時間
との時間差に基づいて、前記カッタピットの摩耗量を求
める摩耗演算器とを有することを特徴としている。
A second aspect of the present invention is an ultrasonic transmitter attached to the rear end of the cutter pin 1-, and a reflected wave of the ultrasonic wave emitted by the ultrasonic transmitter attached to the rear end of the cutter tip. an ultrasonic receiver that receives the ultrasonic wave, and a wear calculator that calculates the amount of wear of the cutter pit based on the time difference between the time when the ultrasonic transmitter outputs the ultrasonic wave and the time when the ultrasonic receiver receives the ultrasonic wave. It is characterized by having the following.

〔作用] 上記の如く構成した本発明の第1は、アクチュエータに
よってロッドをカッタピットに沿って前進させ、ロッド
の先端をカッタピット前方の地山に当接たせる。そして
、ロッドの先端が地山に当接したことを到達検出器によ
て検知するとともに、このときのロッドの前進量をスI
・ローフ検出器によって読み取り、このストローク検出
器22の検出値からカッタピッI・の摩耗量を求める。
[Operation] In the first aspect of the present invention configured as described above, the rod is advanced along the cutter pit by the actuator, and the tip of the rod is brought into contact with the ground in front of the cutter pit. Then, the reach detector detects that the tip of the rod has touched the ground, and the amount of advance of the rod at this time is detected by the screen.
- It is read by a loaf detector, and the wear amount of the cutter pitch I is determined from the detected value of this stroke detector 22.

また、本発明の第2は、カッタピットの後端部に設けた
超音波発信器の出力した超音波がカンタピットの先端に
おいて反射され、超音波受信器によって受信される。従
って、超音波発信器が超音波を出力した時間と超音波受
信器が超音波を受信した時間との時間差が得られる。そ
こで、摩耗演算器は、超音波発信器の発信時刻と超音波
受信器の受信時刻とを受け、両者の時間差を求めて、こ
の時間差と予め与えられた超音波がカッタビット中を伝
播する速さとに基づいてカッタピットの長さを演算し、
カッタピットの初期長さとの差からカッタピットの摩耗
量を産出する。
Moreover, the second aspect of the present invention is that the ultrasonic waves output from the ultrasonic transmitter provided at the rear end of the cutter pit are reflected at the tip of the cutter pit and received by the ultrasonic receiver. Therefore, the time difference between the time when the ultrasound transmitter outputs the ultrasound and the time when the ultrasound receiver receives the ultrasound is obtained. Therefore, the wear calculator receives the transmission time of the ultrasonic transmitter and the reception time of the ultrasonic receiver, calculates the time difference between the two, and calculates the time difference between the two and the speed at which the ultrasonic wave given in advance propagates through the cutter bit. Calculate the length of the cutter pit based on the
The amount of wear of the cutter pit is determined from the difference between the length and the initial length of the cutter pit.

このように、本発明においては、ロッドの前進量を検出
することにより、またカッタピットの先端で反射した超
音波を検出することにより、カンタピットの摩耗量を確
実、正確に検出することができ、カッタピットの交換を
適切に行え、掘削作業の能率を向上することができる。
As described above, in the present invention, the amount of wear on the cutter pit can be reliably and accurately detected by detecting the amount of advance of the rod and by detecting the ultrasonic waves reflected at the tip of the cutter pit. , the cutter pit can be replaced appropriately, and the efficiency of excavation work can be improved.

〔実施例〕〔Example〕

本発明のカッタピットの摩耗検出装置の好ましい実施例
を、添付図面に従って詳説する。
A preferred embodiment of the cutter pit wear detection device of the present invention will be described in detail with reference to the accompanying drawings.

第1図は、本発明の第1実施例に係るカッタピントの摩
耗検出装置の説明図である。
FIG. 1 is an explanatory diagram of a cutter focus wear detection device according to a first embodiment of the present invention.

第1図において、カッタピット10は、図示しない地中
掘削機のカッタヘッド14の前面に取り付けである。そ
して、カッタピット1oは、カッタヘッド14が回転す
ることによってカンタヘッド14と一体に回転し、地山
16を掘削する。
In FIG. 1, a cutter pit 10 is attached to the front surface of a cutter head 14 of an underground excavator (not shown). The cutter pit 1o rotates together with the cutter head 14 as the cutter head 14 rotates, and excavates the ground 16.

地中掘削機のカッタヘッド14の後方には、油圧シリン
ダ等のアクチュエータ18が設けである。
An actuator 18 such as a hydraulic cylinder is provided behind the cutter head 14 of the underground excavator.

このアクチュエータ18には、カッタピット10の長さ
を検出するためのロッド20が取り付けてあり、カッタ
ヘッド14が所定の位置(基準位置)に停止したときに
、カッタヘッド14に形成した透孔(図示せず)を介し
て、ロッド20をカッタピット10に沿って進退させる
ことができるようになっている。また、アクチュエータ
18の先端部には、例えば磁気スケールや差動1〜ラン
ス、または回転ローラ式等のストローク検出器22が設
けてあり、ロッド20の前進ストローク量を検出できる
ようにしである。
A rod 20 for detecting the length of the cutter pit 10 is attached to the actuator 18, and when the cutter head 14 stops at a predetermined position (reference position), the through hole formed in the cutter head 14 ( (not shown), the rod 20 can be moved forward and backward along the cutter pit 10. Further, a stroke detector 22 such as a magnetic scale, a differential lance, or a rotary roller type is provided at the tip of the actuator 18 so that the forward stroke amount of the rod 20 can be detected.

一方、ロッド20には、例えば歪ゲージなどの到達検出
器24が取り付けてあり、ロッド20の先端がカッタピ
ット10前方の地山]6に当接したことを検知できるよ
うにしである。そして、到達検出器24とストローク検
出器22とは、摩耗演算器26に接続してあり、検出信
号を摩耗演算器26に入力する。この摩耗演算器26の
出力側には、表示装置28が接続され、摩耗演算器24
が求めたカッタピット10の摩耗量を表示できるように
なっている。
On the other hand, a reach detector 24 such as a strain gauge is attached to the rod 20 so that it can be detected that the tip of the rod 20 has come into contact with the ground [6] in front of the cutter pit 10. The reach detector 24 and the stroke detector 22 are connected to a wear calculator 26 and input detection signals to the wear calculator 26 . A display device 28 is connected to the output side of the wear calculator 26, and a display device 28 is connected to the output side of the wear calculator 26.
The amount of wear on the cutter pit 10 determined by can be displayed.

上記の如く構成した実施例の作用は、次のとおりである
The operation of the embodiment configured as described above is as follows.

カッタピット10の摩耗量を検出する場合、カッタヘッ
ド14を基準位置に停止させる。その後、アクチュエー
タ18を作動し、ロッド20をカンタヘッド】4に形成
した透孔を通して前方に押し出し、カッタピット10に
沿って前進させる。そして、ロッド20が前進を開始す
ると、ストローク検出器22がその前進量を検出して検
出信号を摩耗演算器26に入力する。
When detecting the amount of wear on the cutter pit 10, the cutter head 14 is stopped at a reference position. Thereafter, the actuator 18 is actuated to push the rod 20 forward through the through hole formed in the cutter head 4 and advance it along the cutter pit 10. When the rod 20 starts moving forward, the stroke detector 22 detects the amount of movement and inputs a detection signal to the wear calculator 26 .

一方、ロッド20ば、アクチュエータ18によって前進
させられ、先端が地山に押圧されて歪が発生する。そし
て、到達検出器24は、ロッド20の歪を検出してロッ
ド20が地山16に到達したことを検知し、検知信号を
摩耗演算器26に送出する。
On the other hand, the rod 20 is moved forward by the actuator 18, and its tip is pressed against the ground, causing strain. Then, the arrival detector 24 detects the distortion of the rod 20 to detect that the rod 20 has reached the ground 16, and sends a detection signal to the wear calculator 26.

摩耗演算器26は、到達検出器24から検知信号を受は
取ると、そのときストローク検出器22が出力している
ロッド20の前進ストローク量を読み込み、このストロ
ーク量からカッタピッ1−10の長さを求める。さらに
、摩耗演算器26は、求めたカッタピット10の長さを
カッタピット10の初期長さと比較し、カッタピット1
0の摩耗量を演算して表示装置28に表示する。そして
、摩耗量の検出が終了すると、アクチュエータ18によ
ってロッド20を後退させる。
When the wear calculator 26 receives the detection signal from the reach detector 24, it reads the forward stroke amount of the rod 20 outputted by the stroke detector 22 at that time, and calculates the length of the cutter pit 1-10 from this stroke amount. seek. Furthermore, the wear calculator 26 compares the obtained length of the cutter pit 10 with the initial length of the cutter pit 10, and
A wear amount of 0 is calculated and displayed on the display device 28. Then, when the detection of the amount of wear is completed, the rod 20 is moved backward by the actuator 18.

このように、実施例においては、ロッド20の前進量か
らカッタピット10の任意の摩耗量を容易、正確に検出
することができる。従って、交換するカッタピットの手
配遅れなどが防げ、カッタピットの適切な交換が可能と
なって、掘削作業の能率を向上することができる。
In this way, in the embodiment, any amount of wear on the cutter pit 10 can be easily and accurately detected from the amount of advance of the rod 20. Therefore, delays in arranging replacement cutter pits can be prevented, the cutter pits can be replaced appropriately, and the efficiency of excavation work can be improved.

なお、前記実施例においては、カッタピット10の摩耗
量を摩耗演算器26によって求めるようにしたが、スト
ローク検出器22を直読して摩耗量を求めるようにして
もよい。また、アクチュエータ18をカッタヘッド14
に取り付けてカッター・ラド14と一体に回転させるよ
うにして、カッタピット10による掘削中に摩耗量を検
出できるようにしてもよい。そして、前記実施例におい
ては、アクチュエータ18がシリンダである場合につい
て説明したが、アクチュエータはモータ等であってもよ
い。さらに、前記実施例においては、到達検出器24と
して歪ゲージを用いた場合について説明したが、到達検
出器はロードセル等であってもよい。
In the embodiment described above, the amount of wear on the cutter pit 10 is determined by the wear calculator 26, but the amount of wear may also be determined by directly reading the stroke detector 22. In addition, the actuator 18 is connected to the cutter head 14.
It is also possible to attach it to the cutter pit 10 and rotate it together with the cutter rad 14, so that the amount of wear can be detected during excavation by the cutter pit 10. In the embodiment described above, the case where the actuator 18 is a cylinder has been described, but the actuator may also be a motor or the like. Furthermore, in the embodiment described above, a strain gauge is used as the arrival detector 24, but the arrival detector may be a load cell or the like.

第2図は、本発明の第2実施例の説明図である。FIG. 2 is an explanatory diagram of a second embodiment of the present invention.

第2図において、カッタピット10の後端面には、超音
波発信器である送信トランスデユーサ30と超音波受信
器である受信トランスデユーサ32とが取り付けである
。そして、送信トランスデユーサ30は、パルス発生器
36が接続され、パルス発生器36が発生したパルスに
応じた超音波をカッタピット10内に入射する。また、
受信トランスデユーサ32は、送信トランスデユーサ3
0が発生した超音波の、カンタビット1oの先端面10
aから反射してきた超音波を検出し、電気信号に変換し
て受信回路38に送出する。
In FIG. 2, a transmitting transducer 30, which is an ultrasonic transmitter, and a receiving transducer 32, which is an ultrasonic receiver, are attached to the rear end surface of the cutter pit 10. The transmission transducer 30 is connected to a pulse generator 36 and inputs ultrasonic waves corresponding to pulses generated by the pulse generator 36 into the cutter pit 10 . Also,
The receiving transducer 32 is the transmitting transducer 3
The tip surface 10 of Cantavit 1o of the ultrasonic wave generated by 0
The ultrasonic wave reflected from a is detected, converted into an electrical signal, and sent to the receiving circuit 38.

摩耗演算器40ば、時間差検出部42と摩耗演算部44
とからなり、時間差検出部42にパルス発生器36と受
信回路38とが接続してあって、これらから信号を受け
て両信号が入力してきた時間の差を求め、摩耗演算部4
4人力する。摩耗演算部44は、時間差検出部42の出
力信号と、カッタピット10を伝播する超音波の速度と
からカッタピット10の長さを演算し、カッタピット1
0の摩耗量を求めて表示袋ff 28に表示する。
Wear calculation unit 40, time difference detection unit 42 and wear calculation unit 44
A pulse generator 36 and a receiving circuit 38 are connected to a time difference detection section 42, which receives signals from these, calculates the difference in time when both signals are input, and calculates the difference in time between the two signals.
It takes 4 people. The wear calculation section 44 calculates the length of the cutter pit 10 from the output signal of the time difference detection section 42 and the speed of the ultrasonic wave propagating through the cutter pit 10, and calculates the length of the cutter pit 10.
The wear amount of 0 is determined and displayed on the display bag ff28.

上記の如く構成した第2実施例の作用は、次のとおりで
ある。
The operation of the second embodiment configured as described above is as follows.

パルス発生器36は、所定の時間毎にパルスを発生し、
そのパルスを送信トランスデユーサ30に送出するとと
もに、摩耗演算器40の時間差検出部42にパルス発生
信号を入力する。時間差検出部42は、パルス発生器3
6からパルス発生信号を受けると、パルス発生信号を受
けた時刻を図示しないメモリに記憶する。
The pulse generator 36 generates a pulse at predetermined time intervals,
The pulse is sent to the transmission transducer 30, and at the same time, the pulse generation signal is input to the time difference detection section 42 of the wear calculator 40. The time difference detection section 42 is connected to the pulse generator 3
When the pulse generation signal is received from 6, the time at which the pulse generation signal was received is stored in a memory (not shown).

一方、送信トランスデユーサ30は、パルス発生器36
からパルスを受けると、そのパルスに対応した周波数の
超音波を発生し、カッタピッ1−10に入射する。カッ
タビット10に入射した超音波は、一部がカッタビット
10の先端面10aにおいて反射され、受信トランスデ
ユーサ32に受信される。
On the other hand, the transmitting transducer 30 includes a pulse generator 36
When a pulse is received from the cutter pin 1-10, an ultrasonic wave having a frequency corresponding to the pulse is generated and enters the cutter pin 1-10. A portion of the ultrasonic waves incident on the cutter bit 10 is reflected at the distal end surface 10 a of the cutter bit 10 and is received by the receiving transducer 32 .

受信トランスデユーサ32は、反射してきた超音波を検
知すると、超音波の強度に仕倒した電気信号を検出信号
として受信回路38に送る。そして、受信回路38は、
受信l−ランスデューサ32から検出信号を受けると、
時間差検出部42に受信信号を送る。
When the receiving transducer 32 detects the reflected ultrasonic wave, it sends an electric signal adjusted to the intensity of the ultrasonic wave to the receiving circuit 38 as a detection signal. Then, the receiving circuit 38
Upon receiving the detection signal from the receiving l-transducer 32,
The received signal is sent to the time difference detection section 42.

時間差検出部42は、受信回路38から受信信号が入力
してくると、その時刻とパルス発生信号を受けた時刻と
の差(時間差)を求めて摩耗演算部42に入力する。摩
耗演算部42は、予め入力しであるカッタビット10の
超音波の伝播速度と時間差検出部42が求めた時間差と
からカッタビット10の長さを演算する。さらに、摩耗
演算部42は、予め入力されているカッタヒツト1oの
初期長さから、上記演算して求めたカッタヒツト10の
長さを減算し、その差をカッタビット10の摩耗量とし
て表示装置28に表示する。
When the reception signal is input from the reception circuit 38, the time difference detection section 42 calculates the difference (time difference) between that time and the time when the pulse generation signal is received, and inputs it to the wear calculation section 42. The wear calculation unit 42 calculates the length of the cutter bit 10 from the propagation velocity of the ultrasonic wave of the cutter bit 10, which is input in advance, and the time difference determined by the time difference detection unit 42. Furthermore, the wear calculation unit 42 subtracts the length of the cutter hit 10 obtained by the above calculation from the initial length of the cutter hit 1o input in advance, and displays the difference as the wear amount of the cutter bit 10 on the display device 28. indicate.

このように、本実施例においては、カッタビット10の
長さを連続的に実測しているため、カンタピット10の
摩耗量をより正確に得ることができる。
In this manner, in this embodiment, since the length of the cutter bit 10 is actually measured continuously, the amount of wear of the canter pit 10 can be obtained more accurately.

[発明の効果] 以上に説明したように、本発明によれば、ロッドをカン
タビットに沿って前進させることにより、また超音波の
発信時刻と受信時刻との差を求めることにより、カッタ
ビットの摩耗量を正確に検出することができて、カッタ
ピッI・の適切な交換が可能となり、掘削作業の能率を
向上することができる。
[Effects of the Invention] As explained above, according to the present invention, the cutter bit can be adjusted by moving the rod forward along the cutter bit and by determining the difference between the transmission time and reception time of the ultrasonic wave. The amount of wear can be detected accurately, the cutter pit can be replaced appropriately, and the efficiency of excavation work can be improved.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の第1実施例の説明図、第2図は第2実
施例の説明図、第3図は従来の摩耗検出方法の説明図で
ある。 10−一一−−−カツタビッ タ、20−−−−−−ロッド、 24 −〜−到達検出器、 30−−−−一超音波発信器 32−−−−−超音波受信器 1・、18 −一−−−−アクチュエー22’ −−−
−一ストローク検出2L26.40−一−−−−摩耗演
算著L (送信トランスデユーサ)、 (受信トランスデユーサ)。
FIG. 1 is an explanatory diagram of a first embodiment of the present invention, FIG. 2 is an explanatory diagram of a second embodiment, and FIG. 3 is an explanatory diagram of a conventional wear detection method. 10-11---Katsutabitta, 20------Rod, 24---Arrival detector, 30----1 Ultrasonic transmitter 32------Ultrasonic receiver 1, 18 -1----- Actuator 22' ---
-One stroke detection 2L26.40-1---Wear calculation L (transmitting transducer), (receiving transducer).

Claims (2)

【特許請求の範囲】[Claims] (1)地中掘削機に設けられ、カッタビットに沿ってロ
ッドを進退させるアクチュエータと、前記ロッドの前進
量を検出するストローク検出器と、前記ロッドの先端が
地山に到達したことを検知する到達検出器とを有するこ
とを特徴とするカッタビットの摩耗検出装置。
(1) An actuator installed in the underground excavator that moves the rod forward and backward along the cutter bit, a stroke detector that detects the amount of advance of the rod, and a stroke detector that detects when the tip of the rod reaches the ground. A cutter bit wear detection device comprising a reach detector.
(2)カッタビットの後端部に取り付けた超音波発信器
と、前記カッタビットの後端部に取り付けられ、前記超
音波発信器が発信した超音波の反射波を受信する超音波
受信器と、前記超音波発信器が超音波を出力した時間と
前記超音波受信器が受信した時間との時間差に基づいて
、前記カッタビットの摩耗量を求める摩耗演算器とを有
することを特徴とするカッタビットの摩耗検出装置。
(2) an ultrasonic transmitter attached to the rear end of the cutter bit; and an ultrasonic receiver attached to the rear end of the cutter bit to receive reflected waves of the ultrasonic waves emitted by the ultrasonic transmitter; , a cutter comprising: a wear calculator that calculates the amount of wear on the cutter bit based on the time difference between the time when the ultrasonic transmitter outputs the ultrasonic wave and the time when the ultrasonic receiver receives the ultrasonic wave. Bit wear detection device.
JP5837190A 1990-03-09 1990-03-09 Wear detecting device for cutter bit Pending JPH03259707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5837190A JPH03259707A (en) 1990-03-09 1990-03-09 Wear detecting device for cutter bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5837190A JPH03259707A (en) 1990-03-09 1990-03-09 Wear detecting device for cutter bit

Publications (1)

Publication Number Publication Date
JPH03259707A true JPH03259707A (en) 1991-11-19

Family

ID=13082471

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5837190A Pending JPH03259707A (en) 1990-03-09 1990-03-09 Wear detecting device for cutter bit

Country Status (1)

Country Link
JP (1) JPH03259707A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010068727A1 (en) * 2008-12-10 2010-06-17 Baker Hughes Incorporated Real time dull grading
JP2012218025A (en) * 2011-04-08 2012-11-12 Toyoda Iron Works Co Ltd Electrode abnormality detector of automatic welding robot
US9624729B2 (en) 2008-12-10 2017-04-18 Baker Hughes Incorporated Real time bit monitoring

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010068727A1 (en) * 2008-12-10 2010-06-17 Baker Hughes Incorporated Real time dull grading
US9624729B2 (en) 2008-12-10 2017-04-18 Baker Hughes Incorporated Real time bit monitoring
JP2012218025A (en) * 2011-04-08 2012-11-12 Toyoda Iron Works Co Ltd Electrode abnormality detector of automatic welding robot

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