JPS5973265A - Tool holder type detector - Google Patents
Tool holder type detectorInfo
- Publication number
- JPS5973265A JPS5973265A JP57185199A JP18519982A JPS5973265A JP S5973265 A JPS5973265 A JP S5973265A JP 57185199 A JP57185199 A JP 57185199A JP 18519982 A JP18519982 A JP 18519982A JP S5973265 A JPS5973265 A JP S5973265A
- Authority
- JP
- Japan
- Prior art keywords
- tool holder
- tool
- shaft
- thin plate
- detecting
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements 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
- B23Q17/0952—Arrangements 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 during machining
- B23Q17/0966—Arrangements 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 during machining by measuring a force on parts of the machine other than a motor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、小径のドリル、タップ、Iントミル等の回転
工具や回転接触子(以下、回転J−具類という)を用い
、工作機械、就中、NC工作機械を適応制御化するため
に、インブ[]セスセンサによって加工時に生じる力の
状態、工具の状態、加工物の1法、形状の状態、工具接
近の状態等々を正確に把握する必要のある技術分野に利
用丈ることができるものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to machine tools, especially machine tools, using rotating tools and rotating contacts (hereinafter referred to as rotating J-tools) such as small-diameter drills, taps, and mills. In order to adaptively control NC machine tools, it is necessary to accurately grasp the state of force generated during machining, the state of the tool, the method of the workpiece, the state of the shape, the state of tool approach, etc. It can be used in certain technical fields.
従来技術
マシニングレンタによる加工を例にとると、直径20m
m以下のドリル加工(代表的なものはねじの下穴)が比
較的多く、しかも1回にお【ノる穴数が多いのが一般的
であるから、それだけに回転工具の欠損予知が大切であ
る。ところがその切削力の変動は回転系の慣性力に較べ
ると甚だ小さいから、たとえ主軸モーターに流れる電流
値を測定して切削力を検知しようとしても十分な検知は
回能であった。Taking machining using a conventional machining machine as an example, the diameter is 20 m.
Since there is a relatively large number of drilling operations of less than 1.5 ft (m) in diameter (typically pilot holes for screws), and the number of holes drilled at one time is generally large, it is important to predict breakage of rotating tools. be. However, the fluctuations in the cutting force are extremely small compared to the inertial force of the rotating system, so even if an attempt was made to detect the cutting force by measuring the current flowing through the spindle motor, sufficient detection would be impossible.
この欠点を解消するものとしては、本発明者の発表にな
る1μ和56年度1機学会秋季大会学術講演会論文集p
、978〜990がある。これは以下に述べる原理に基
づく切削動力計を直接主軸に取付け、これによってスラ
ストとトルク方向の切削力を同詩に検出し、検出した信
号を無線で外部に取出り゛こと、a3よび実験の結果、
小径回転工具の欠損を予知できること、について開示が
なされている。この切削動力削は、回転側に切削動力計
を取付ける場合の問題点である主軸部分の剛性低下を防
止し、しかも検出感瓜を向上させるため、板の真中をく
り抜いて得た実質的に平行で且つ薄板状の検出部構造を
採用している。該検出部構造は、一方を固定し、他方に
−Lから荷重をかけるときの変形は重心が平行移動する
形で行なわれるため、剛性の低下が小さくてすむという
特長がある。かかる検出部構造の実質的に平行な薄板個
所に四個のス(〜レーンゲージを貼り付け、このうち、
二枚のストレーンゲージには力に比例した圧縮歪を、池
の二枚には引張り歪を受【プさせる。この四個のストレ
ーンゲージでブリッジを組み、アンプを介して重気信号
を得ることでそのときの力の大きさを検出している。As a solution to this drawback, the present inventor's presentation of the 1μ sum 1, 1
, 978-990. This involves attaching a cutting dynamometer based on the principle described below directly to the main shaft, thereby simultaneously detecting the cutting force in the thrust and torque directions, and extracting the detected signal to the outside via wireless. result,
It is disclosed that it is possible to predict breakage of small diameter rotary tools. This cutting power cutting method prevents a decrease in the rigidity of the main shaft, which is a problem when installing a cutting dynamometer on the rotating side, and also improves the detection sensitivity. In addition, a thin plate-like detection section structure is adopted. The structure of the detection part has the advantage that when one part is fixed and a load is applied from -L to the other part, the deformation is performed in such a way that the center of gravity moves in parallel, so that the decrease in rigidity is small. Four lane gauges are attached to the substantially parallel thin plate portions of the detection structure, and among these,
The two strain gauges receive compressive strain proportional to the force, and the two pond plates receive tensile strain. These four strain gauges form a bridge and the magnitude of the force at that moment is detected by obtaining a heavy air signal via an amplifier.
発明の目的
上記した主軸搭載方式では、工具ホルダーと主軸側どの
接触の問題、油の使用による問題といった点で、未だ十
分な機能を発揮し得ない懸念が残っていた。そこで本発
明ではかかる不都合を解消することを、その目的として
なされたもので・ある。Purpose of the Invention The above-described spindle mounting system still has concerns that it may not be able to function satisfactorily due to problems such as contact between the tool holder and the spindle and problems caused by the use of oil. Therefore, the present invention has been made with the aim of eliminating such inconveniences.
発明の構成
この目的を達成づる本発明の構成は、回転工具類を装若
可能とした工具ホルダーの中心軸を該工具ボルダ−のシ
ャンク部と接続した軸筒部の内側に配設する。そして中
心軸と軸筒部との間は、中心軸に加えられた力のうち検
出したいノコの方向に撓むことができる薄板状の支持構
造と、実質的に平行で且つ薄板状の検出部構造を介して
連結覆る。更に検出部構造に生じた変位を電気的信Y]
に変換する手段およびその電気的信号を送信する焦線送
信装置を該工具ホルダー内に自装せしめ、外部に無線受
信装置を配設する。Structure of the Invention The structure of the present invention which achieves this object is that the central axis of the tool holder, which allows rotary tools to be reloaded, is disposed inside a shaft cylinder portion connected to the shank portion of the tool boulder. Between the central axis and the shaft cylinder part, there is a thin plate-like support structure that can bend in the direction of the saw to be detected out of the force applied to the central axis, and a thin plate-like detection part that is substantially parallel to the saw. Connected through the structure and covered. Furthermore, the displacement caused in the detection part structure is electrically transmitted.
A means for converting the electrical signal into the tool holder and a focal beam transmitting device for transmitting the electrical signal are mounted inside the tool holder, and a wireless receiving device is disposed outside.
衷1d駈
本発明のtE適な実施例を示す添付図面によって本発明
を詳述づると、つぎのどおりである。The present invention will now be described in detail with reference to the accompanying drawings showing preferred embodiments of the present invention.
第1図にJ3いて、工作機械の主軸穴41に装着された
工員ホルダー1は、人別すると、シトンク部2と、シ1
7ンク部2とは取(=Jボルト7で結合される軸筒部3
と、軸筒部3の内側に配置された中心軸4を有し、軸筒
部3と中心軸4とは後で詳しく述べる検出したい力の方
向に撓むことができる薄板状の支持構造5.5ならびに
軸筒部3の内端面と中心軸4の下端面とに取(Jポル[
−8で結合され、実質的に平行で且つ薄板状の検出部構
造16を形成した板状の検出部側6とで連結される。中
心軸4の先端個所9は、ドリルチ1!ツタやコレットヂ
t?ツクといった工具装着用のチャック42を取fq番
プるに適した形状となっている。尚、シ1/ンク部2に
設りた符号10で示す部材は自動工具交換装置の爪によ
って挟持されるためのものである。The operator's holder 1, which is located at J3 in FIG.
7 The link part 2 is the shaft cylinder part 3 connected with the J bolt 7.
and a central axis 4 disposed inside the cylindrical part 3, and the cylindrical part 3 and the central axis 4 form a support structure 5 in the form of a thin plate that can be bent in the direction of the force to be detected, which will be described in detail later. .5 and the inner end surface of the shaft cylinder part 3 and the lower end surface of the central shaft 4 (J pole [
-8, and connected to a plate-shaped detection part side 6 forming a substantially parallel and thin plate-shaped detection part structure 16. The tip 9 of the central shaft 4 is the drill bit 1! Ivy or colette? It has a shape suitable for pulling the chuck 42 for mounting a tool such as a chuck. Incidentally, the member designated by the reference numeral 10 provided in the sink 1/ink portion 2 is for being held by the claws of the automatic tool changer.
検出したい力は工具類にかかるI・ルクかスラス1〜か
或いはその両者である。1ヘルクを検出したい場合の薄
板状の支持構造5は、中心軸4の上下に形成した肩部1
1.11ど係合係止することができる2個の環状体12
を用意し、第3図に明らかとしたように、各環状体の任
意の直径方向J3よびこれと直交する方向からそれぞれ
狭い間隔で対向する左も二つの細長い透孔13゜13を
穿設して、軸方向に沿う4つの薄板構造部分14を放射
状に形成後、つぎに遠く離れた各透孔13,13間を横
割溝15で分断することにより、横割溝15より上方の
環状体12部分と横割溝15より下方の環状体12部分
とが放射状の4つの薄板構造部分14だ(プで接続する
構造とづる。このように加工した環状体12゜12を中
心軸4の上記肩部ii、iiと係合係止させ、その状態
で環状体12と中心軸4との嵌挿周縁部を溶接すること
で、例えば上方の環状体12部分と中心軸4とを固定し
たならば、残りの下方の環状体12部分は軸筒部3と溶
接する。このように11i躬状の薄板構造部分14は中
心ttll14に近い方の一端を中心軸4に固定し、中
心軸4から遠い方の他端を軸筒部3に固定することで、
工具類に作用するトルクは中心軸4から放射状にある薄
板状の支持構造5を経て軸筒部3に伝達され、中心軸3
とての外側の軸筒部3との間に捩れによる変位を生じさ
せることになる。The force to be detected is I.lux or slus 1~ applied to the tool, or both. When it is desired to detect 1 Herc, the thin plate-like support structure 5 has shoulder parts 1 formed above and below the central axis 4.
1.11 Two annular bodies 12 that can be engaged and locked
As shown in Fig. 3, two elongated through holes 13°13 were bored in each annular body from the arbitrary diametrical direction J3 and from the direction perpendicular to this on the left side facing each other at a narrow interval. After forming four thin plate structure parts 14 along the axial direction in a radial manner, the parts of the annular body 12 above the horizontal grooves 15 are separated by dividing the far apart through holes 13, 13 with the horizontal grooves 15. and the portion of the annular body 12 below the horizontal groove 15 are the four radial thin plate structural portions 14 (referred to as a structure connected by a pu). . The lower part of the annular body 12 is welded to the shaft cylinder part 3.In this way, one end of the 11i-shaped thin plate structure part 14, which is close to the center ttll14, is fixed to the central shaft 4, and the end which is far from the central shaft 4 is fixed to the central shaft 4. By fixing the other end to the shaft cylinder part 3,
Torque acting on the tools is transmitted to the shaft cylinder portion 3 via the thin plate-like support structure 5 radially extending from the central shaft 4.
Displacement due to torsion will occur between the shaft and the outer shaft cylinder portion 3.
一方、取付ボルト8 ”C−軸筒部3と中心軸4とに板
状の検出部材6が取付かることについて(、未前述した
。トルクを検出づる検出部構造16は、第4図かられか
るように、検出部材6に二つの細長い縦貫通孔17.1
7を穿設づることによって、検出部材6の両側端面と縦
貫通孔17゜17の両端内面との間に実質的に平行で1
1つi9板状の個所を形成することで得られる。図示の
8ij m通孔17の形状は二つの小さな1L孔間を直
線状の溝で連結したが、角孔でも、或いは多数の小さな
丸孔を一部重畳させて形成したものでもよい。検出部構
造16には1〜ルクによって捩れによる弾性変形が起る
から、その変位を電気的信号に変換する手段18、具体
的にはストレーンゲージを該構造16個所に貼りイ1す
、4ゲージ法によるブリッジ回路で測定する。On the other hand, regarding the attachment of the plate-shaped detection member 6 to the mounting bolt 8'' C-shaft cylindrical portion 3 and central shaft 4 (not mentioned above), the detection structure 16 for detecting torque is shown in FIG. As shown, two elongated vertical through holes 17.1 are provided in the detection member 6.
7, substantially parallel 1 is formed between both end surfaces of the detection member 6 and the inner surfaces of both ends of the vertical through hole 17.
It can be obtained by forming one i9 plate-shaped part. Although the illustrated 8ij m through hole 17 has a shape in which two small 1L holes are connected by a linear groove, it may be formed by a square hole or by partially overlapping a large number of small round holes. Since elastic deformation due to torsion occurs in the detection part structure 16 at a torque of 1~1, a means 18 for converting the displacement into an electrical signal, specifically a strain gauge, is pasted at 16 locations on the structure. Measured using a bridge circuit according to the method.
スラス1−を検出したい場合の薄板状の支持構′造5は
、第7図の如く、環状体12に上下に対向する透孔13
’、 13’を穿設して横向きの4つの薄板構造部分1
4′を放射状に形成後、上下に対向する透孔13’、
13’個所をそれぞれ縦割溝15′で分割し、こうして
4分割された対向する2個所の上端を中心軸4と溶接し
たならば、残りの対向り′る2個P1の下端は軸筒部3
と溶接する。このように薄板状の支持構造5はトルク検
出かスラスト検出かで薄板の面の向きを違える。When it is desired to detect the thrust 1-, the thin plate-shaped support structure 5 is constructed with a through hole 13 vertically opposed to the annular body 12, as shown in FIG.
', 13' are drilled to form four horizontally oriented thin plate structure parts 1
4′ are formed in a radial manner, through-holes 13′ are formed which face each other vertically,
13' are divided by vertical grooves 15', and the upper ends of the two opposing parts thus divided into four parts are welded to the center shaft 4, then the lower ends of the remaining two opposing parts P1 are attached to the shaft cylinder part. 3
Weld with. In this way, the thin plate-shaped support structure 5 has a different orientation of the thin plate surface depending on whether torque detection or thrust detection is performed.
同様なことは実質的に平行で且つ薄板状の検出部+MT
i16についてもいえる。スラスト検出の場合は、第8
図に示したように検出部材6に二つの細長い横貫通孔1
7’、 17’並びにこれと交叉する他の二つの細長い
横貫通孔17’、 17’を穿設り゛ることによって、
検出部材6の上下両面と四つの横貫通孔17′の両端内
面との間に実質的に平行で1つ薄板状の個所を形成し、
スラス1−によって軸方向の弾性変形が起るようにする
。The same thing is the substantially parallel and thin plate-like detection part + MT.
The same can be said about i16. For thrust detection, the 8th
As shown in the figure, two elongated horizontal through holes 1 are provided in the detection member 6.
By drilling 7' and 17' as well as two other elongated horizontal through holes 17' and 17' that intersect with these,
Forming a substantially parallel thin plate-like portion between the upper and lower surfaces of the detection member 6 and the inner surfaces of both ends of the four horizontal through holes 17';
The thrust 1- causes elastic deformation in the axial direction.
その変位を測定するのはトルクの場合に準じて行なえば
にい。It is best to measure the displacement in the same way as for torque.
上記したトルクまたはスラス1へに変形しやJく、他の
方向の力やトルクには変形しにくい薄板状の支持構造5
ど、その値を検出づる実質的に平行で且つ薄板状の検出
部構造1Gは、上記二つの部分のうちの一つで兼用さけ
ることもできる。また、トルクとスラス]〜を同時にし
かもそれぞれを分離して検出Jるため、重ね合せたり、
一体構造とすることも可能である。A thin plate-shaped support structure 5 that is easily deformed to the above-mentioned torque or thrust 1 and difficult to be deformed by force or torque in other directions.
However, the substantially parallel and thin plate-like detection section structure 1G for detecting the value can also be used as one of the above two parts. In addition, in order to detect torque and thrust simultaneously and separately, it is possible to overlap
It is also possible to have an integral structure.
この工具ホルダー1内には上記変換手段18によって得
た電気的信号を送信する無線送信装置20を自装せしめ
る。電源どしての電池21は、第5図の如り、遠心力に
対するバランスおよび取付・取外しの便を考慮しC2個
使用し、軸筒部3の対称な外周部個所に固定する。固定
接は取付ボルト22により取(=Jかる保護カバー23
で覆って外部と遮断する。送信用の電気回路がオンの状
態にあることを外部から確認−Jることができるように
、軸筒部3にパイロツ1〜うンブ2/lを取fi LJ
、電池21と(ま第6図のように結線づる。同図中、
抵抗Rを介して接続される二つのリミッ[〜スイッチ2
5は電池21の無駄な消耗を防止覆るだめのもので、第
1図と第5図から明らかとしたように、バネ26によっ
て常時外りに向けて弾撥され且つその頭部27を工具ホ
ルダーシャンク部2より出没可能とした作動杆28を設
【プ、該作動杆28の頭部27ど工作機械側1系合部3
2との協働により、換言すれば工具ホルダー1を工作機
械に装着することでリミットスイッチ25はオンとなり
、工具ボルダ−1を取外づことでオフとなす。なお図示
の例で1作動杆28を前部28aと軸部28bに2分割
し、軸部281)と軸部28bを案内するブシュ29に
イれぞれ貫通孔30.31を設けたのは、組立・取外し
時には両貫通孔30.31にビン(図示せず)を挿入す
ることで長さを短縮した状態にセット可能とするためで
ある。リミットスイッチ25と電気的に接続する無線送
信器33はシトンク部2の内部に装着する。ま1=送信
アンデナ34はシ17ンク部2の外周に一周させ、使用
時の損傷を避けるために充填材で固めておく。無線信号
を受信する受信装置35の受信アンテナ3Gについても
、]737の溝内に収めたのちは充填材で固めでおく。A wireless transmitting device 20 for transmitting the electrical signal obtained by the converting means 18 is mounted inside the tool holder 1. As shown in FIG. 5, two batteries 21 are used as a power source, taking into account the balance against centrifugal force and ease of installation and removal, and are fixed at symmetrical locations on the outer periphery of the shaft cylinder portion 3. The fixed connection is attached using the mounting bolt 22 (= J-kuru protective cover 23
cover to isolate it from the outside. Attach pilots 1 to 2/l to the shaft cylinder part 3 so that you can confirm from the outside that the transmitting electric circuit is on.
, and the battery 21 (connect as shown in Figure 6. In the figure,
Two limits connected via resistor R [~switch 2
5 is a cover to prevent wasteful consumption of the battery 21, and as shown in FIGS. 1 and 5, it is constantly repelled outward by a spring 26 and its head 27 is attached to a tool holder. An operating rod 28 that can be protruded and retracted from the shank portion 2 is provided, and the head 27 of the operating rod 28 is connected to the machine tool side 1 system joint 3.
In other words, the limit switch 25 is turned on when the tool holder 1 is mounted on the machine tool, and turned off when the tool boulder 1 is removed. In the illustrated example, one operating rod 28 is divided into two parts, the front part 28a and the shaft part 28b, and the through holes 30 and 31 are provided in the bushing 29 that guides the shaft part 281) and the shaft part 28b, respectively. This is because, during assembly and disassembly, by inserting bottles (not shown) into both through holes 30 and 31, the length can be set in a shortened state. A wireless transmitter 33 electrically connected to the limit switch 25 is installed inside the switch section 2. (1) The transmitting antenna 34 is placed around the outer periphery of the sink portion 2 of the sink 17, and is hardened with a filling material to avoid damage during use. The receiving antenna 3G of the receiving device 35 that receives radio signals is also placed in the groove of ]737 and then hardened with a filler.
回転機械の回転軸等から発する信号を無線送信する場合
、なるべく強い信号を歪なく受信づるには、回転軸側に
送信用アンテナを耐重ると共に、回転軸を支える機械本
体において、はぼ回転軸の全周を取巻くように受信用ア
ンテナを配しな()ればならない。ところが主軸周りの
空間には、酋通、切屑や切削油剤の処理装置といった種
々の機器を取付けるから、受信アンテナ36保持用の=
」737を配置するスペースは掻く狭い場所に限定され
Cしまう。扇状をなり第2図のコマ37の場合、その中
心角は30°程度しかない。このような理由で受信アン
テナ36を主軸周辺の極く一部にしか配することができ
ない場合には、受信アンテナのインピーダンスZaと受
信器38の入力インピーダンスzbとが大きく相異する
。!、−とえば受信アンテナが一回巻のコイルC゛あり
、コーイルの線径r@0.5X10 m、mlイルの
全長pを100×10−5m、信りの周波数f ヲB
Qx 10”ヘルツ、非透磁率μを1とすると、受信ア
ンテナのインピーダンスZaはほぼ0.3Ω、これに対
して受信器の入力インピーダンスZbは75Ωもある。When transmitting wirelessly a signal emitted from the rotating shaft of a rotating machine, in order to receive as strong a signal as possible without distortion, the transmitting antenna should be placed on the rotating shaft side, and the machine body supporting the rotating shaft should be placed near the rotating shaft. The receiving antenna must be placed so as to surround the entire circumference of the area. However, in the space around the main shaft, various equipment such as a cutting board, a processing device for chips and cutting fluids, etc. are installed, so the space around the main shaft is
The space to place the ``737'' is limited to a narrow space. In the case of the fan-shaped top 37 in FIG. 2, its central angle is only about 30°. If the receiving antenna 36 can be disposed only in a very small portion around the main axis for such reasons, the impedance Za of the receiving antenna and the input impedance zb of the receiver 38 will be greatly different. ! -For example, the receiving antenna has a coil C with one turn, the wire diameter of the coil is r @ 0.5 x 10 m, the total length of the ml coil is 100 x 10-5 m, and the frequency of belief is f.
Assuming that Qx is 10'' Hertz and the magnetic impermeability μ is 1, the impedance Za of the receiving antenna is approximately 0.3Ω, whereas the input impedance Zb of the receiver is as high as 75Ω.
良好な受信のため(こはZa→7bでなt)ればならな
いのに、」1記のにうに大きく相異すると、信号の減衰
を生じ、受信不能とさえなる。この場合の解決策として
は、第6図の電気配線図、に示すとおり、受信アンテナ
36と受信器38に信号を伝達する同軸ケーブル3つと
の間に、アンテナ側からみたインピーダンスがZaであ
り、同軸ケーブル側からみたインピーダンスzbにマツ
チングするような、コーイル1−とコンデンサCで椛成
するブリッジを挿入する。かかるブリッジは、コマ37
の早部に密閉状の空所40を形成しく第1図参照)、そ
の空所40内に収納するとよい。Although it is necessary for good reception (this must be Za → 7b), if there is a large difference as described in item 1, the signal will be attenuated and even become unreceivable. As a solution to this case, as shown in the electrical wiring diagram of FIG. 6, the impedance seen from the antenna side is Za between the receiving antenna 36 and the three coaxial cables that transmit signals to the receiver 38, Insert a bridge consisting of coil 1- and capacitor C that matches the impedance zb seen from the coaxial cable side. Such a bridge is piece 37
It is preferable to form a sealed cavity 40 in the early part of the body (see FIG. 1), and store it within that cavity 40.
具体的な=1イルLとコンデンサCの値は、ω=2π「
として、
ω’1c=1 および L/C=Za −Zllの連
立方程式の解である
+−=、J”’E’M−乙]−/2π丁 およびC=
1/2 πr、J?口「T71から求めることができ
る。」−述の例をこの痺式にあてはめてしおよびCの値
を算出すると、L=0.01×10 ヘンリー、
C=400X10 ファラド
どなる。実際にこのようなインピータンス変換を伴う回
路を設けた結果は、送信アンテナ34から1m1tll
lれたところに受信アンテナ36を置いても、受信器3
8の出力は落ちなかった。また上記算式によって得たり
、Cの値に人きく 5ffねなけば、それでよいことも
確認済みである。The specific value of =1il L and capacitor C is ω=2π'
As, ω'1c=1 and L/C=Za −Zll, which is the solution of the simultaneous equation +−=, J”'E'M−Otsu]−/2πd and C=
1/2 πr, J? ``It can be determined from T71.'' Applying the above example to this paralysis formula and calculating the value of C, L = 0.01 x 10 Henrys and C = 400 x 10 Farads. The result of actually providing a circuit with such impedance conversion is that the distance from the transmitting antenna 34 to 1m1tll is
Even if the receiving antenna 36 is placed at a low angle, the receiver 3
8's output did not drop. It has also been confirmed that if it is obtained by the above formula or if the value of C does not exceed 5ff, it is fine.
シャンク部2と軸筒部3の重なり合う個所、保護カバー
23が軸筒部3に嵌まり合う個所、或いは作動杆28の
摺動個所といった所には、例えば0リングによる密封を
施し、本体内と外界との確実な遮断を行ない・、油の飛
沫や切屑の浸入を防ぐ。要覆れば内部に窒素ガス等の封
入を可能どづる。。The parts where the shank part 2 and the shaft cylinder part 3 overlap, the parts where the protective cover 23 fits into the shaft cylinder part 3, and the parts where the operating rod 28 slides are sealed with, for example, O-rings to prevent internal and external connections within the main body. Ensures isolation from the outside world and prevents oil splashes and chips from entering. If it is covered, it is possible to fill the inside with nitrogen gas, etc. .
発明の効果
本発明にJ、ればチャック42にいかなる回転工具類が
取りつこうとも、その工具類と極めて接近した位置にJ
3いて知りたい力を検出し、これを無線送受信により取
出し、しかもいかなる小径回転工具類の小さな力の変化
も外乱の影響を受りることなく正確且つ容易にとらえら
れるという効果が19られる。そこでつぎのような利用
が可能となる。既に知られていることに、工具刃先にデ
ツピングが生じると、トルクの低下として下向きのスパ
イクが現われること、またドリルの折れる直前には切削
抵抗値の著しいTRを見るスパイクが生じ、これはトル
ク、スラストの別を問わないし、またタップやエンドミ
ルでも同様であることがある。本発明の工具ホルダー形
検出装置を用いると、微細な切削抵抗の変化もとらえる
ことができるから、工具にチッピング、摩耗、折損とい
った異常を生じたことがわかり、工具損傷モニタリング
、工具交換。Effects of the Invention With the present invention, no matter what kind of rotating tools are attached to the chuck 42, the tool will be placed in close proximity to the chuck 42.
3, detect the force you want to know, extract it by wireless transmission and reception, and have the advantage of being able to accurately and easily capture small force changes in any small-diameter rotary tools without being affected by disturbances. Therefore, the following uses are possible. It is already known that when tipping occurs at the cutting edge of a tool, a downward spike appears as a decrease in torque, and immediately before the drill breaks, a sharp spike in the cutting resistance value TR occurs, which is caused by the torque, It doesn't matter what kind of thrust it is, and the same thing can happen with taps and end mills. By using the tool holder type detection device of the present invention, it is possible to detect minute changes in cutting resistance, so it is possible to detect abnormalities such as chipping, wear, or breakage in the tool, and facilitate tool damage monitoring and tool replacement.
工作機械の自己診断等に使用できる。Can be used for self-diagnosis of machine tools, etc.
また工作機械によるさJ、ざまな加工において、加工物
と工具との接触を検知したり、加1−物の穴内径その他
の正確な測定をリ−る必要があるが、本発明によれば回
転工具を接触子と兼ねさせることがでさ、子の都度回転
をとめて工具とタッチセンサーを取付り変えするといっ
た面倒さは全く不要となる。更に工具が加」°物に触れ
ない間は工具を早送りで送り、工具が加工物に触れた瞬
間、切削送りにするといったことや、熱雷対などを埋め
込んで温度補正を行なうこと等、随意に実施可能である
。In addition, in various types of machining using machine tools, it is necessary to detect contact between a workpiece and a tool, and to accurately measure the inside diameter of a hole in a workpiece. By allowing the rotary tool to also function as a contact, there is no need to stop rotating the tool and replace the tool and touch sensor each time. Furthermore, you can optionally feed the tool in rapid traverse while the tool does not touch the workpiece, and switch to cutting feed the moment the tool touches the workpiece, or embed a thermocouple to compensate for the temperature. It is possible to implement
第1図は本発明の一実施例を承り一断面図、第2図はそ
の一部の平面図、第3図は第1図の薄板状の支持構造の
理解を容易ならしめるための一部を切除して示した斜視
図、第4図と第5図は第1図のIV −IV線J3よび
V −v線で切断し矢印方向に見た図、第6図は電気配
線図、第7図は第3図とは相異する他の実施例を示づ支
持構造の斜視図、第8図は第7図の支持構造と組合わさ
れる検出部構造を示す断面図である。
1・・・工具ホルダー、2・・・シレンク部、3・・・
軸筒部、4・・・中心軸、5・・・薄板状の支持構造、
16・・・実質的に平行で且つ薄板状の検出部構造、1
8・・・検出部構造に生じた変位を電気的信号に変換す
る手段、20・・・無線送信装置、35・・・無線受信
装置。
特許出願人 畑 村 洋太部
代 理 人 尾 股 行 雄同
茂 見 積同
荒 木 友之助375FIG. 1 is a cross-sectional view of one embodiment of the present invention, FIG. 2 is a plan view of a part thereof, and FIG. 3 is a part of the thin plate-shaped support structure shown in FIG. 1 for easy understanding. FIG. 4 and FIG. 5 are perspective views taken along lines IV-IV and V-v in FIG. 1 and viewed in the direction of the arrows. FIG. 7 is a perspective view of a support structure showing another embodiment different from that of FIG. 3, and FIG. 8 is a sectional view showing a detection structure combined with the support structure of FIG. 7. 1...Tool holder, 2...Silent part, 3...
Axial cylinder part, 4... Central shaft, 5... Thin plate-like support structure,
16...Substantially parallel and thin plate-like detection part structure, 1
8... Means for converting the displacement generated in the detection unit structure into an electrical signal, 20... Radio transmitting device, 35... Radio receiving device. Patent Applicant: Yotabe Hatamura, Attorney, Yuki Omata, Shigeru Yudo, Estimate
Yunosuke Araki375
Claims (1)
)の中心軸(4)を該工具ホルダーのシトンク部〈2〉
と接続した軸筒部(3)の内側に配置し、中心軸(4)
と軸筒部(3)との間は、回転工具類に作用する力のう
ち検出したい力の方向に撓むことができる薄板状の支持
構造(5〉と、実質的に平行で且つ薄板状の検出部構造
り16)を介して連結し、該検出部IMi(1G)に生
じた変位を電気的信号に変換する手段(18)およびそ
の電気的信号を送信J−る烈線送(tU肢装(20)を
該工具ホルダー(1)内に自装ゼしめ、外部に無線受信
装置(35)を配設したことを特徴とする工具ホルダー
形検出装置。 2、上記無線送(Fi装置(20)には、常時外方に向
けて弾撥され且つその頭部(27)を工具ホルダーシャ
ンク部(2)J、り出没iり能とした作動杆(28)を
設(J、該作動杆(28)の頭部(27)とT作I幾械
本体側係合部〈32)どの協働により無線送信装置(2
0)の電気回路をオンAフさせる特t′1諸求の範囲第
1項記載の]只ホルダー形検出装置。 3、上記受信装置(35)には、二I作機械の回転軸周
辺の空間の一部を出自する受信アンテナ(36)と受信
アンブナ(3G)からの信号を受信器〈38〉に送る同
軸ケーブル(39)どの間に、コンテ゛ンサとコイルの
ブリッジ回路であるインピーダンス変換を伴う回路を介
装している特δ′1請求の範囲第1項記載の]−具ホル
ダー形検出装置。[Claims] 1. Tool holder (1
) of the central axis (4) of the tool holder.
It is placed inside the shaft cylinder part (3) connected to the central shaft (4).
A thin plate-shaped support structure (5) that can be bent in the direction of the force that is desired to be detected out of the forces acting on the rotary tools, and a thin plate-shaped support structure (5) that is substantially parallel to the shaft cylinder part (3). A means (18) for converting the displacement generated in the detecting section IMi (1G) into an electrical signal and a wire transmission (tU) for transmitting the electrical signal are connected via the detecting section structure 16) of A tool holder type detection device characterized in that a limb (20) is self-mounted in the tool holder (1) and a wireless receiving device (35) is disposed outside. 2. The wireless transmission (Fi device) (20) is provided with an operating rod (28) which is always resiliently repelled outward and whose head (27) can be retracted and retracted from the tool holder shank portion (2) (J). The head (27) of the operating rod (28) and the T-shaped machine main body side engaging part (32) cooperate to connect the wireless transmitter (2).
0) A holder-type detection device according to item 1 which turns on and off the electric circuit of t'1. 3. The receiving device (35) includes a receiving antenna (36) originating from a part of the space around the rotating shaft of the machine tool 2, and a coaxial device that sends signals from the receiving antenna (3G) to the receiver <38>. The tool holder type detection device according to claim 1, wherein a circuit with impedance conversion, which is a bridge circuit of a capacitor and a coil, is interposed between the cables (39).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57185199A JPH0246348B2 (en) | 1982-10-21 | 1982-10-21 | KOGUHORUDAAGATAKENSHUTSUSOCHI |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57185199A JPH0246348B2 (en) | 1982-10-21 | 1982-10-21 | KOGUHORUDAAGATAKENSHUTSUSOCHI |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5973265A true JPS5973265A (en) | 1984-04-25 |
JPH0246348B2 JPH0246348B2 (en) | 1990-10-15 |
Family
ID=16166592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57185199A Expired - Lifetime JPH0246348B2 (en) | 1982-10-21 | 1982-10-21 | KOGUHORUDAAGATAKENSHUTSUSOCHI |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0246348B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62166948A (en) * | 1986-01-16 | 1987-07-23 | Takaaki Nagao | Device for predicting abnormality of rotary tool |
EP1025952A4 (en) * | 1997-02-14 | 2001-03-28 | Nt Engineering Kabushiki Kaish | Working machine and its communication method |
CN104972309A (en) * | 2015-07-17 | 2015-10-14 | 无锡市杰美特模具技术有限公司 | Assembly line mechanism for assembly line |
JP2017140688A (en) * | 2016-02-12 | 2017-08-17 | エヌティーツール株式会社 | Smart tool holder |
JP2017140687A (en) * | 2016-02-12 | 2017-08-17 | エヌティーツール株式会社 | Smart tool holder |
JP2018535105A (en) * | 2015-10-21 | 2018-11-29 | ハイマー・ゲーエムベーハー | Tool holder with built-in sensor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4330820A1 (en) * | 1993-09-13 | 1995-03-16 | Komet Stahlhalter Werkzeug | Tool head with external power supply |
-
1982
- 1982-10-21 JP JP57185199A patent/JPH0246348B2/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62166948A (en) * | 1986-01-16 | 1987-07-23 | Takaaki Nagao | Device for predicting abnormality of rotary tool |
EP1025952A4 (en) * | 1997-02-14 | 2001-03-28 | Nt Engineering Kabushiki Kaish | Working machine and its communication method |
US6424821B1 (en) | 1997-02-14 | 2002-07-23 | Nt Engineering Kabushiki Kaisha | Working machine and its communication method |
CN104972309A (en) * | 2015-07-17 | 2015-10-14 | 无锡市杰美特模具技术有限公司 | Assembly line mechanism for assembly line |
CN104972309B (en) * | 2015-07-17 | 2017-05-24 | 无锡市杰美特科技有限公司 | Assembly line mechanism for assembly line |
JP2018535105A (en) * | 2015-10-21 | 2018-11-29 | ハイマー・ゲーエムベーハー | Tool holder with built-in sensor |
JP2017140688A (en) * | 2016-02-12 | 2017-08-17 | エヌティーツール株式会社 | Smart tool holder |
JP2017140687A (en) * | 2016-02-12 | 2017-08-17 | エヌティーツール株式会社 | Smart tool holder |
Also Published As
Publication number | Publication date |
---|---|
JPH0246348B2 (en) | 1990-10-15 |
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