JPS5914445A - Detector for abnormality of tool - Google Patents

Detector for abnormality of tool

Info

Publication number
JPS5914445A
JPS5914445A JP10580782A JP10580782A JPS5914445A JP S5914445 A JPS5914445 A JP S5914445A JP 10580782 A JP10580782 A JP 10580782A JP 10580782 A JP10580782 A JP 10580782A JP S5914445 A JPS5914445 A JP S5914445A
Authority
JP
Japan
Prior art keywords
tool
abnormality
eddy current
detector
current 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.)
Granted
Application number
JP10580782A
Other languages
Japanese (ja)
Other versions
JPS622938B2 (en
Inventor
Kiyoshi Ide
井手 清
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10580782A priority Critical patent/JPS5914445A/en
Publication of JPS5914445A publication Critical patent/JPS5914445A/en
Publication of JPS622938B2 publication Critical patent/JPS622938B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/09Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machine Tool Sensing Apparatuses (AREA)

Abstract

PURPOSE:To detect an abnormality of a tool with a high degree of accuracy, by detecting an abnormal output voltage of a detector spaced at a predetermined distance from the surface to be worked, of a work made of electrically conductive material, for detecting eddy currents. CONSTITUTION:A work 5 is treated by a tool 2 so that a worked surface 51 is formed. A detector 3 is secured to a member suspended from a tool bed 1 with being spaced at a predetermined distance from the worked surface 52. In this condition, if the abovementioned spaced distance is constant and the surface roughness of the worked surface 51 is uniform, eddy currents are constant. However, if any abnormality is brought about in the tool, the eddy currents are varied, so that an abnormality judging signal is issued from a processing section.

Description

【発明の詳細な説明】 この発明は、金属切削工具の摩耗および欠損等を検出す
る工具の異常検出装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool abnormality detection device for detecting wear, damage, etc. of a metal cutting tool.

従来のこの種工具の異常検出装置としては、工作機械の
主軸電動機の電流や電力を監視するものなどがあった。
Conventional abnormality detection devices for this type of tool include devices that monitor the current and power of the spindle motor of the machine tool.

即ちNOのプログラムに沿って正常な工具での切削時の
主軸電動機の雷、流もしくは電力を記憶しておき、この
記憶値を標準として現在値と比較し、その比率が設定し
た上限下限を越えた場合に異常と判定するものであった
That is, according to the NO program, the lightning, current, or power of the spindle motor during cutting with a normal tool is memorized, and this memorized value is compared with the current value as a standard, and the ratio exceeds the set upper and lower limits. It was determined that there was an abnormality if the

このような従来の工具の異常検出装置は、No装置で同
一の工作物を加工する時にしか使用できないため、同一
工作機械と同一工具で少量の工作物を加工する場合には
使用できない。また工具や仕上げ切削などのような軽負
荷時や微少な工具の欠けを検出できないなどの欠点があ
った。
Such a conventional tool abnormality detection device can only be used when machining the same workpiece with a No. 1 machine, so it cannot be used when machining a small amount of workpieces with the same machine tool and the same tool. Additionally, there were drawbacks such as the inability to detect slight chips in tools or during light loads such as during tool or finish cutting.

この発明はこれら従来のものの欠点を除去しようとする
もので、工具の近傍に渦電流検出器を設は切削面との距
離と切削面の粗さを計測し、その値から工具の異常を検
出する装置を提供するものである。
This invention attempts to eliminate these drawbacks of the conventional methods. An eddy current detector is installed near the tool to measure the distance to the cutting surface and the roughness of the cutting surface, and detect abnormalities in the tool from these values. The present invention provides a device for

以下この発明の一実施例を第1図〜第3図にもとづいて
説明する。即ち第1図〜第8図において、+1) ti
旋盤の工具取付台、(2)は工具取付台[1) K固定
さねたバイト、(3)は工具台(1)に固定され切削面
との距離と切削面の粗さを計測する渦電流検出器、(4
)は渦電流検出器(3)の出力信号を処理し、バイト(
2)の異常を判定する処理部、(5)は被工作物、5u
Fiパイ) (2) Kよって加工された被加工物(5
)の加工面である。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. That is, in Figures 1 to 8, +1) ti
The tool mount of the lathe, (2) is the tool mount [1] K-fixed bit, (3) is the vortex that is fixed to the tool holder (1) and measures the distance to the cutting surface and the roughness of the cutting surface. Current detector, (4
) processes the output signal of the eddy current detector (3) and generates a byte (
2) is the processing unit that determines the abnormality, (5) is the workpiece, 5u
Fi pie) (2) Workpiece machined by K (5
) is the machined surface.

このように構成さ名たものでは、バイト(2)は工具取
付台[1) K固定されでおり、工具取付台(1)の送
りによって、バイト(2)は被工作物(5)の表面(5
+1を切削する。渦電流検出器(3)もバイト(2)と
共に工具取付台fl) K固定されているので、円筒側
りにおいて被工作物(5)の加工面611と渦電流検出
器(8)とは常に一定の相対位置を保つこととなる。
In this structure, the cutting tool (2) is fixed to the tool mount [1] K, and the feeding of the tool mount (1) moves the cutting tool (2) onto the surface of the workpiece (5). (5
Cut +1. Since the eddy current detector (3) is also fixed to the tool mount (fl) K together with the cutting tool (2), the machining surface 611 of the workpiece (5) and the eddy current detector (8) are always in contact with each other on the cylindrical side. A constant relative position will be maintained.

一方渦電流検出器(81K、は、渦電流検出器(3)と
導電体である被加工物(5)との距離りまたは被加工物
(5)の表面粗さRaK応じた出力電圧v 75に第2
図に示す如く導出される。
On the other hand, the eddy current detector (81K) has an output voltage v 75 depending on the distance between the eddy current detector (3) and the workpiece (5), which is a conductor, or the surface roughness RaK of the workpiece (5). second to
It is derived as shown in the figure.

即ち第2図において、横軸にLおよびRa、縦軸VCV
をとった場合、Lに応・じた出力′電圧’VllはRa
を一定とすれば実線VLの如く、またR&に応じた電圧
VRaはLを一定とすれば一点鎖線VRaの如くなる。
That is, in FIG. 2, the horizontal axis represents L and Ra, and the vertical axis represents VCV.
, the output 'voltage' Vll according to L is Ra
If L is held constant, the voltage VRa corresponding to R& is shown as a dashed-dotted line VRa if L is held constant.

今パイ) (3) K欠けが生じ、被加工物(5)の加
工寸法が変化すると渦電流検出器(8)の出力電圧Vは
、第8図に示す如く横軸r時間、縦軸に電圧をとった場
合、時間tlvCおいて変化し、処理部(4)で判定さ
れる。またバイト刃先の摩耗も欠けと同様にして検出で
きる。さらに刃先の異常と共に刃先の振111VCよる
表面粗さの発生も渦電流検出器の出力電圧の変化として
検出できる。
(3) When K chipping occurs and the machining dimensions of the workpiece (5) change, the output voltage V of the eddy current detector (8) changes as the horizontal axis r time and the vertical axis as shown in Figure 8. When the voltage is taken, it changes after a time tlvC and is determined by the processing unit (4). In addition, wear on the cutting edge of the cutting tool can be detected in the same way as chipping. Furthermore, the occurrence of surface roughness due to the vibration 111VC of the cutting edge as well as the abnormality of the cutting edge can be detected as a change in the output voltage of the eddy current detector.

なお上記実施例では、渦電流検出器(3)f、工具取付
台(1)ニ固定したものを示したが、横送り台上に工具
と対称の位置にあって移動するよつ構成さ名た運動機構
に渦電流検出器を取付けても同様の効果が得られる。
In the above embodiment, the eddy current detector (3) f is fixed to the tool mount (1), but the eddy current detector (3) f is fixed to the tool mounting base (1). A similar effect can be obtained by attaching an eddy current detector to the motion mechanism.

またS上記実施例では旋盤の例で説明したが、第4図に
示すように被加工物(5)を工具(2) Kよって切削
するフライス盤にも適用でき、同様の効果を得られる。
Although the above embodiment has been explained using a lathe as an example, it can also be applied to a milling machine that cuts a workpiece (5) with a tool (2) K, as shown in FIG. 4, and similar effects can be obtained.

また形削り盤、平削り盤等の他の形式の工作機械につい
ても同様に適用できる。
The present invention can also be applied to other types of machine tools such as shaping machines and planing machines.

上記のようにこの発明による工具の異常検出装置は、工
具によって切削された導電体からなる被加工物の加工面
に追随するよう所定間隔を隔て\渦電流検出装置を対向
配置し、この間隙に応じて出力信号を導出するよう構成
すると共に、渦電流検出器の出力信号の変動によって工
具の異常を検出するようにしたもので、工具の摩耗や欠
損等を高精度に検出することができる。
As described above, in the tool abnormality detection device according to the present invention, eddy current detection devices are arranged facing each other at a predetermined interval so as to follow the machined surface of a workpiece made of a conductive material cut by a tool, and The sensor is configured to derive an output signal accordingly, and detect tool abnormalities based on fluctuations in the output signal of the eddy current detector, making it possible to detect tool wear, damage, etc. with high accuracy.

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

第1図〜第8図はいずれもこの発明の一実施例を示すも
ので、第1図は要部側面図、第2図および第8図は動作
説明図、第4図はこの発明の他の実施例を示す要部断面
図である。 図中、[1) ti′i工具台、(2)はバイト、(3
)は渦電流検出器、(4)は処理部、(5)は被加工物
である。 尚、図中同一符号は同−又は相当部分を示す。 代理人 荻 野 信 − 第1図 第2図 第3図 、t、        71+Ii+7第4図 手続補正書(自発) 1・事件の表示   特願昭57−105807号2、
発明の名称  工具の異常検出装置;3.補正をする者 代表者片111仁八部 1、代理人 5、補正の対象 明細書の発明の詳細な説明の欄、図面 6、補正の内容 (1)明i書第2頁第8行に「また工具や仕上げなど−
1とあるのを「また仕上げなど」に訂正する。 (2)同第4頁第6行に「表面粗さの発生も」とあるの
を「表面粗さの増大も」に訂正する。 (8)同第5頁第1行に「この間隙に応じて」とあるの
を「この間隙や加工面の表面粗さに応じて」に訂正する
。 (4)図面の第1図を訂正する。 以 上 第1図
Figures 1 to 8 all show an embodiment of the present invention. Figure 1 is a side view of the main part, Figures 2 and 8 are explanatory diagrams of the operation, and Figure 4 is an embodiment of the invention. FIG. In the figure, [1] ti′i tool stand, (2) a cutting tool, (3
) is an eddy current detector, (4) is a processing section, and (5) is a workpiece. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Nobuo Ogino - Figure 1 Figure 2 Figure 3, t, 71+Ii+7 Figure 4 Procedural amendment (voluntary) 1. Indication of case Patent application No. 105807 No. 1987 2,
Title of the invention Tool abnormality detection device; 3. Representative of the person making the amendment 111 Part 1, Agent 5, Column for detailed explanation of the invention in the specification subject to amendment, Drawing 6, Contents of the amendment (1) Memorandum I, page 2, line 8 ``In addition, tools and finishing etc.
1 should be corrected to ``Also, finishing, etc.'' (2) On page 4, line 6, the phrase ``occurrence of surface roughness'' is corrected to ``increase in surface roughness.'' (8) In the first line of page 5, the phrase "according to this gap" should be corrected to "according to this gap and the surface roughness of the machined surface." (4) Correct Figure 1 of the drawings. Above Figure 1

Claims (2)

【特許請求の範囲】[Claims] (1)工具によって切削された導電体からなる被加工物
の加工面に追随するよう所定間隔を隔′C一対向配置さ
れると共に、この間隙に応じた出力信号を導出する渦電
流検出器を備え、上記渦電流検出器の出力信号の変動に
よってと記工具の異常を検出することを特徴とする工具
の異常検出装置。
(1) Eddy current detectors are arranged opposite each other at a predetermined interval so as to follow the machined surface of a workpiece made of a conductive material cut by a tool, and derive an output signal according to this gap. An abnormality detection device for a tool, comprising: detecting an abnormality in the tool based on fluctuations in an output signal of the eddy current detector.
(2)渦電流検出器は、工具の取付台に取付けられてい
る特許請求の範囲第1項記載の工具の異常検出装置。
(2) The tool abnormality detection device according to claim 1, wherein the eddy current detector is attached to a mounting base of the tool.
JP10580782A 1982-06-18 1982-06-18 Detector for abnormality of tool Granted JPS5914445A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10580782A JPS5914445A (en) 1982-06-18 1982-06-18 Detector for abnormality of tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10580782A JPS5914445A (en) 1982-06-18 1982-06-18 Detector for abnormality of tool

Publications (2)

Publication Number Publication Date
JPS5914445A true JPS5914445A (en) 1984-01-25
JPS622938B2 JPS622938B2 (en) 1987-01-22

Family

ID=14417373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10580782A Granted JPS5914445A (en) 1982-06-18 1982-06-18 Detector for abnormality of tool

Country Status (1)

Country Link
JP (1) JPS5914445A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02180520A (en) * 1988-09-13 1990-07-13 Nkk Corp Previewing device for edge chip of circular cutting tool
JPH045542A (en) * 1990-04-23 1992-01-09 Mitsubishi Heavy Ind Ltd Tool abnormality detecting method
JP2019141941A (en) * 2018-02-19 2019-08-29 東芝三菱電機産業システム株式会社 Cutting working device and cutting working method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119586A (en) * 1976-03-31 1977-10-07 Agency Of Ind Science & Technol Method of detecting damage in tool optically

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52119586A (en) * 1976-03-31 1977-10-07 Agency Of Ind Science & Technol Method of detecting damage in tool optically

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02180520A (en) * 1988-09-13 1990-07-13 Nkk Corp Previewing device for edge chip of circular cutting tool
JPH045542A (en) * 1990-04-23 1992-01-09 Mitsubishi Heavy Ind Ltd Tool abnormality detecting method
JP2019141941A (en) * 2018-02-19 2019-08-29 東芝三菱電機産業システム株式会社 Cutting working device and cutting working method

Also Published As

Publication number Publication date
JPS622938B2 (en) 1987-01-22

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