JPS5924944A - Device for measuring tool holding force - Google Patents
Device for measuring tool holding forceInfo
- Publication number
- JPS5924944A JPS5924944A JP13167582A JP13167582A JPS5924944A JP S5924944 A JPS5924944 A JP S5924944A JP 13167582 A JP13167582 A JP 13167582A JP 13167582 A JP13167582 A JP 13167582A JP S5924944 A JPS5924944 A JP S5924944A
- Authority
- JP
- Japan
- Prior art keywords
- tool
- holding force
- force
- rod
- tool holding
- 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/002—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring the holding action of work or tool holders
- B23Q17/005—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring the holding action of work or tool holders by measuring a force, a pressure or a deformation
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】
本発明は、マシニングセンタ等の工作機械における工具
の保持力を測定する工具保持力測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool holding force measuring device for measuring the holding force of a tool in a machine tool such as a machining center.
通常、マシニングセンタ等の工作機械においては、工具
を主軸に保持する際に、ドローパーの周囲に縮設された
多数の皿ばねの弾性力を利用して工具の接続部分である
テーバシャンクを主軸の工具保持面に抑圧保持する構造
が用いられる。従って、皿ばねの弾性力、即ち工具の保
持力は、主軸から工具へ動力を伝達する上で極めて重要
であり、一般に保持力が低ドすると加工精度、切削能力
等が低ｌＪすることになる。Normally, in machine tools such as machining centers, when holding a tool on the spindle, the elastic force of a large number of disc springs contracted around the drawper is used to hold the taper shank, which is the connecting part of the tool, on the spindle. A structure that suppresses and holds the surface is used. Therefore, the elastic force of the disc spring, that is, the holding force of the tool, is extremely important in transmitting power from the spindle to the tool, and generally speaking, if the holding force is low, machining accuracy, cutting ability, etc. will be reduced. .
こうした、保持力の低下は、殆どの場合、皿ばねの破損
によって生じることが多いが、皿ばねは主軸内部に格納
されており、通常の状態では外部から見ることができな
いために、皿ばねが破損して保持力が低下してもオペレ
ータはそれに気付かずに作業を継続し、結果的に加工品
質の低下を招くことが多々あり、容易に工具の保持力を
測定し、皿ばね等の異常を認識し得る工具保持力測定装
置の開発が望まれていた。In most cases, this decrease in holding force is caused by damage to the disc spring, but since the disc spring is stored inside the main shaft and cannot be seen from the outside under normal conditions, the disc spring is damaged. Even if the holding force decreases due to damage, the operator continues to work without noticing this, which often results in a decline in machining quality. It has been desired to develop a tool holding force measuring device that can recognize tool holding force.
本発明は、上記事情に鑑み、容易に工具の保持力を測定
し、皿ばね等の異常を認識し得る工具保持力測定装置を
提供することを目的とするものである。SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a tool holding force measuring device that can easily measure the holding force of a tool and recognize abnormalities in disc springs and the like.
即ち、本発明は、主軸との接続部分の形成された本体を
有し、前記本体にプルスタッドの形成されたロッドを設
け、該ロッドに引っ張り力検出手段を接続し、更に前記
検出手段に、検出手段の検出値を表示する表示手段を接
続して構成される。That is, the present invention has a main body formed with a connecting portion to the main shaft, a rod provided with a pull stud formed on the main body, a tensile force detecting means connected to the rod, and further comprising: It is constructed by connecting a display means for displaying the detection value of the detection means.
以下、図面に基き、本発明の詳細な説明する３、
第１図は保持力を測定する対象となる、マシニングセン
タの主軸部分の一例を示す断面図、第２図は本発明によ
る工具保持力測定装置の一実施例を示す断面図、第３図
は本発明の他の実施例を示す部分断面図である。Hereinafter, the present invention will be explained in detail based on the drawings. 3. Fig. 1 is a sectional view showing an example of the main shaft portion of a machining center, which is the object of measuring the holding force, and Fig. 2 is a tool holding force measurement according to the present invention. FIG. 3 is a sectional view showing one embodiment of the device, and FIG. 3 is a partial sectional view showing another embodiment of the present invention.
マシニングセンタ１は、第１図に示すように、フレーム
２に複数のベアリング３を介して回転自在に支持される
円筒状の主軸５．を有しており、主軸５の図中左端部に
はテーパ状の工具保持面５ａが形成されている。主軸５
にはドローバ−６が矢印Ａ、Ｂ方向、即ち主軸軸心ＣＬ
に平行に移動自在に嵌入係合しており、ドローバー６と
主軸５の間には、主軸５に嵌着されたスリーブ２５に突
き当てられる形で嵌入されたブロック７を介して多数の
皿ばね９が縮設され、バー６を常時矢印Ｂ方向に付勢し
ている。バー６の図中左端部にはコレット１０が、複数
の保持爪１０ａを主軸軸心ＣＬに対して矢印Ｃ、Ｊ）方
向に開閉自在にした形で設けられており、ドローバー６
の図中右方には、ロッド部１１ａの形成されたピストン
１１が油圧によって矢印Ａ、Ｉ３方向に移動駆動自在に
設けられている。As shown in FIG. 1, the machining center 1 has a cylindrical main shaft 5. A tapered tool holding surface 5a is formed at the left end of the main shaft 5 in the drawing. Main shaft 5
The drawbar 6 is aligned in the direction of arrows A and B, that is, the main shaft center CL.
A large number of disc springs are fitted between the drawbar 6 and the main shaft 5 through a block 7 fitted in such a manner that it abuts against the sleeve 25 fitted on the main shaft 5. 9 is contracted to constantly bias the bar 6 in the direction of arrow B. A collet 10 is provided at the left end of the bar 6 in the figure, and has a plurality of holding claws 10a that can be opened and closed in the directions of arrows C and J with respect to the main shaft axis CL.
On the right side of the figure, a piston 11 having a rod portion 11a is provided so as to be movable in directions of arrows A and I3 by hydraulic pressure.
一方、本発明による工具保持力測定装置１２は、第２図
に示すように、主軸５との接続部分であるテーパシャン
ク１３ａの形成された本体１３を有しており、本体１３
にはりング１５が嵌着している。リング１５には断面円
形のシリンダ１５ａが形成されており、シリンダ１５ａ
にはピストン１６が矢印Ａ、Ｂ方向に移動自在に嵌入保
合し、ピストン１６とシリンダ１５ａによって形成され
たシリンダ１５ａ内の空間には非圧縮性流体である圧油
１７が封入されている。ピストン１６には、先端にプル
スタッド１９ａの形成されたロッド１９が、本体１３を
貫通する形で螺合しており、ロッド１９とリング１５間
及びピストン１６とリング１５間には０リング等のシー
ルリング２０が設けられ、圧油１７の外部への流出を防
止している。リング１５には圧力計２１が、シリンダ１
５ａ内部と連通ずる形で設けられでおり、圧力計２１に
は、シリンダ１５ａ内の圧油１７に加わる圧力をプルス
タッド１９ａのＢ方向の引っ張り力に換算した数値が、
目盛２１ａとして目盛られている。なお、２２は圧油を
シリンダ１５ａ内部に封入するためのプラグである。On the other hand, the tool holding force measuring device 12 according to the present invention, as shown in FIG.
A ring 15 is fitted into the ring. A cylinder 15a having a circular cross section is formed in the ring 15.
A piston 16 is fitted and secured to be movable in the directions of arrows A and B, and pressure oil 17, which is an incompressible fluid, is sealed in a space within the cylinder 15a formed by the piston 16 and the cylinder 15a. A rod 19 with a pull stud 19a formed at its tip is screwed into the piston 16 so as to pass through the main body 13, and between the rod 19 and the ring 15 and between the piston 16 and the ring 15 there is an O-ring or the like. A seal ring 20 is provided to prevent the pressure oil 17 from leaking to the outside. A pressure gauge 21 is attached to the ring 15, and a pressure gauge 21 is attached to the cylinder 1.
The pressure gauge 21 shows a value obtained by converting the pressure applied to the pressure oil 17 in the cylinder 15a into the tensile force of the pull stud 19a in the B direction.
It is graduated as a scale 21a. Note that 22 is a plug for sealing pressure oil inside the cylinder 15a.
本実施例による工具保持力ａｔｌＩ定装置１２及び、マ
シニングセンタ１は、以上のような構成を有するので、
通常の状態でのに具２３の着脱は、第１図に示すように
、まず、ピストン１１を入方向に突出させ、ロッド部１
１ａの先端とドローバ−６を当接係合させ、更にバー６
を皿ばね９の弾性に抗して入方向に移動させる１、する
と、コレット１０の保持爪１０ ａとドローバー６のテ
ーパ部６ｂが当接し、コレット１０もバー６と共に、ス
リーブ２５の段つｔ 部２５ ｂにコレット１０が当接
し、それ以上入方向への移動が阻止されるまで入方向に
移動し、これにより保持爪１０ａとスリーブ２５の先端
２５ａとの当接係合関係が解除される。しかも、ドロー
バー６はコレット１０が段つき部２５ｂに当接停止した
後も入方向へ移動することから、テーパ部６ｂは爪１０
ａを、コレラ）１０の弾性に抗する形で強制的にＤ方向
に開放する。この状態で、工具２３を主軸５に、テーパ
シャンク２３ｂが工具保持面５ａに当接するまで挿入し
、更にピストン１１をＢ方向に後退させると、ドローバ
ー６は、皿ばね９の弾性によってＢ方向に移動させられ
、爪１０ａは、テーパ部６ｂのＢ方向への移動により、
自らの弾性でＣ方向に収斂する。すると、爪１０ａと工
具２３のプルスタッ）’２３ａが係合するが、更にドロ
ーバ−６がＢ方向に移動すると、バー６の図中左端の保
合部６ａが保持爪１０ａの段つき部１０ｂと係合し、コ
レット１０を、プルスタッド２３ａと係合した状態のま
まＢ方向へ引っ張りつつスリーブ２５内に挿入し、コレ
ット■０とプルスタッド２３ａとの保合状態はスリーブ
２５によって強固に保持される。一方、工具２３は、皿
ばね９によってドローバ−６、コレット１０を介してＢ
方向に引っ張られるので、工具２３のテーパシャンク２
３ｂは主軸５の工具保持面５ａに所定の押圧力で押圧さ
れ、工具２３は主軸５に確実に保持される。この状態で
、主軸５を工具２３と共に回転させて所定の加工を行な
うが、主軸５の回転力は工具保持面５ａ及びテーパシャ
ンク２３ｂを介して禰実に伝達され、良好な加工を行な
うことができる。一方、工具２３を主軸５から外す場合
には、前述とは逆に、ピストン１１によってバー６をＡ
方向に移動させてコレット１０の保持爪１０ａ’！−Ｄ
方向に開さ、更にバー６の係合部６ａがプルスタッド２
３ａと当接し、プルスタッド２３ａを入方向に押し出す
こと（こより、テーパシャンク２３ｂと工具保持面５ａ
間の保持状態が解除され、工具２３は主軸５から取り外
される。Since the tool holding force atlI determining device 12 and the machining center 1 according to this embodiment have the above-described configuration,
To attach and detach the knife 23 in a normal state, as shown in FIG.
The tip of 1a and the draw bar 6 are brought into abutting engagement, and then the bar 6 is
When the collet 10 is moved in the entry direction against the elasticity of the disc spring 9, the holding claw 10a of the collet 10 and the tapered portion 6b of the draw bar 6 come into contact with each other, and the collet 10, together with the bar 6, also moves toward the step t of the sleeve 25. The collet 10 comes into contact with the portion 25b and moves in the entry direction until it is prevented from moving any further in the entry direction, thereby releasing the abutment and engagement relationship between the holding claw 10a and the tip 25a of the sleeve 25. . Moreover, since the drawbar 6 moves in the entry direction even after the collet 10 stops contacting the stepped portion 25b, the taper portion 6b
a is forcibly opened in the direction D against the elasticity of cholera) 10. In this state, when the tool 23 is inserted into the main shaft 5 until the taper shank 23b contacts the tool holding surface 5a and the piston 11 is further retreated in the direction B, the drawbar 6 is moved in the direction B by the elasticity of the disc spring 9. The claw 10a is moved by the movement of the tapered portion 6b in the B direction.
It converges in the C direction due to its own elasticity. Then, the claw 10a and the pull stud 23a of the tool 23 engage with each other, but when the draw bar 6 further moves in the direction B, the retaining portion 6a of the bar 6 at the left end in the figure engages with the stepped portion 10b of the holding claw 10a. The collet 10 is inserted into the sleeve 25 while being pulled in the direction B while being engaged with the pull stud 23a, and the collet 10 and the pull stud 23a are firmly held by the sleeve 25. Ru. On the other hand, the tool 23 is connected to B via the drawbar 6 and the collet 10 by the disc spring 9.
The taper shank 2 of the tool 23
3b is pressed against the tool holding surface 5a of the spindle 5 with a predetermined pressing force, and the tool 23 is securely held on the spindle 5. In this state, the main spindle 5 is rotated together with the tool 23 to perform predetermined machining, but the rotational force of the main spindle 5 is transmitted to the thread via the tool holding surface 5a and the taper shank 23b, making it possible to perform good machining. . On the other hand, when removing the tool 23 from the main shaft 5, contrary to the above, the bar 6 is moved by the piston 11.
The holding claw 10a' of the collet 10 is moved in the direction ! -D
furthermore, the engaging portion 6a of the bar 6 is opened in the direction of the pull stud 2.
3a and push out the pull stud 23a in the input direction (thereby, the taper shank 23b and the tool holding surface 5a
The holding state between them is released, and the tool 23 is removed from the spindle 5.
なお、工具２３を主軸５に゛装着した際の保持力、即ち
、コレット１０が工具２３をプルスタッド２３ａを介し
てＢ方向に引く力は、皿ばね９によって付与されるが、
皿ばね９の保持力を測定する場合には、工具保持力測定
装置１２を、通常の工具装着の要領で、主軸５の工具保
持面５ａに、本体１３のテーバシャンク１３ａを押し刊
ける形で、第２図Ｂ方向に挿入し、ロッド１９のプルス
タッド１９ａを介してコレット１０によｔ）Ｂ方向に皿
゛ばね９の弾性力を利用して引っ張らせる。すると、皿
はね９によるお方向の引っ張り力はロッド１９を介して
ピストン１６に伝達され、シリンダ１５ａ内部の圧油１
７を加圧する。圧油１７の圧力変動は圧力計２１によっ
て直ちに検出され、しかもその値はＢ方向のコレット１
０による引っ張り力に換算された目盛２１ａ上で表示さ
れるので、皿ばね９の引っ張り力、即ち工具の保持力は
圧力計２１の値から直ちに判明する。仮に、皿はね９が
破損していた場合には、圧力計２１は通常の場合よりも
低い保持力を表示するので、オペレータは直ちに皿ばね
９の異常を認識できる。Note that the holding force when the tool 23 is attached to the main shaft 5, that is, the force by which the collet 10 pulls the tool 23 in the direction B via the pull stud 23a, is provided by the disc spring 9.
When measuring the holding force of the disc spring 9, the tool holding force measuring device 12 is pressed against the tool holding surface 5a of the main spindle 5 by pressing the taber shank 13a of the main body 13 in the same manner as when mounting a tool. The collet 10 is inserted in the direction B in FIG. Then, the pulling force in the direction by the disc spring 9 is transmitted to the piston 16 via the rod 19, and the pressure oil 1 inside the cylinder 15a is
Pressure 7. Pressure fluctuations in the pressure oil 17 are immediately detected by the pressure gauge 21, and the value is directly detected by the collet 1 in the B direction.
Since it is displayed on the scale 21a converted to a tensile force of 0, the tensile force of the disc spring 9, that is, the holding force of the tool, can be immediately determined from the value of the pressure gauge 21. If the disc spring 9 is damaged, the pressure gauge 21 will display a lower holding force than in the normal case, so the operator can immediately recognize the abnormality of the disc spring 9.
なお、上述の実施例は、引っ張り力検出手段としてピス
トン１６との間に圧油１７を封入したシリンダ１５ａを
設け、プルスタッド１９ａのＢ方向の引っ張り力、即ち
工具保持力を圧力に変換した形で検出し、圧力計２１で
表示した場合について述べたが、引っ張り力の検出手段
はシリンダ１５ａ等に限らず、第３図に示すように、歪
ゲージ２６を、ナツト２９によって本体１３に固定され
たロッド１９に、貼着した形で用い、該ゲージ２６に本
体１３に装着された、ディスプレイ２７ａを有する全体
円環状の歪計２７を接続し、ロッド１９に生ずるＢ方向
の引っ張りによる歪を歪ゲージ２６を介して電気抵抗の
変化として検出し、更に歪計２７により引っ張り力に変
換ルな値としてディスプレイ２７ａ上に表示するように
構成することも当然可能であり、更に圧力センサ等の種
々の検出手段も用いることができる。In addition, in the above-mentioned embodiment, a cylinder 15a in which pressure oil 17 is sealed between the piston 16 and the pull stud 19a is provided as a tensile force detection means, and the tensile force of the pull stud 19a in the B direction, that is, the tool holding force, is converted into pressure. Although we have described the case where the tensile force is detected by the pressure gauge 21, the means for detecting the tensile force is not limited to the cylinder 15a, etc. As shown in FIG. The gauge 26 is attached to the rod 19, and a strain gauge 27, which has a display 27a and is attached to the main body 13, is connected to the gauge 26 to measure the strain caused by the tension in the B direction on the rod 19. Of course, it is also possible to detect the change in electrical resistance via the gauge 26, convert it into a tensile force using the strain gauge 27, and display it on the display 27a. Detection means can also be used.
以上説明したように、本発明によれは、テーパシャンク
１３８等の主軸５との接続部分の形成された本体１３に
、プルスタッド１９ａの形成されたロッド１９を設け、
前記ロッド１９にピストン１６、シリンダ１５ａ及び圧
油１７、歪ゲージ２６等の引っ張り力検出手段を設け、
更に前記検出手段に、検出手段の検出値を表示する圧力
計２１、歪計２７等の表示手段を接続したので、オペレ
ータは任意の時点で、装置ａ１２をマシニングセンタ１
等の工作機械にプルスタッド１９ａを介して保持させる
ことにより、工具の保持力を直ちに知ることができ、そ
れにより、皿ばね９等の異常も容易に認識することが可
能となる。As explained above, according to the present invention, the rod 19 on which the pull stud 19a is formed is provided in the main body 13 on which the connection portion with the main shaft 5 such as the taper shank 138 is formed,
The rod 19 is provided with a piston 16, a cylinder 15a, a pressure oil 17, a strain gauge 26, and other tensile force detection means,
Furthermore, display means such as a pressure gauge 21 and a strain gauge 27 are connected to the detection means for displaying the detected values of the detection means, so that the operator can move the device a12 to the machining center 1 at any time.
By holding the tool in a machine tool such as the above via the pull stud 19a, the holding force of the tool can be immediately known, thereby making it possible to easily recognize abnormalities in the disc spring 9 and the like.
第１図は保持力を測定する対象となるマシニングセンタ
の主軸部分の一例を示す断面図、第２図は本発明による
工具保持力測定装置の一実施例を示す断面図、第３図は
本発明の他の実施例を示す部分断面図である。
１２・・・・・・・・・工具保持力測定装置１３・・・
・・・・・・本 体
１３ａ・・・・・・接続部分（テーパシャンク）１５ａ
・・・・・・シリンダ
１６・・・・・・・・・ピストン
１７・・・・・・・・・非圧縮性流体（圧油）１９・・
・・・・・・・ロッド
１９ａ・・・・・・プルスタッド
２１・・・・・・・・・表示手段（圧力計）２６・・・
・・・・・・検出手段（歪ゲージ）２７・・・・・・・
・・表示手段（歪計）特許出願人 株式会社 山崎鉄
工所
代理人 弁理士 相田伸二
（ばか１名）FIG. 1 is a cross-sectional view showing an example of the main shaft portion of a machining center whose holding force is to be measured, FIG. 2 is a cross-sectional view showing an example of a tool holding force measuring device according to the present invention, and FIG. 3 is a cross-sectional view showing an example of the tool holding force measuring device according to the present invention. FIG. 3 is a partial cross-sectional view showing another embodiment of the invention. 12... Tool holding force measuring device 13...
...Body 13a...Connection part (taper shank) 15a
......Cylinder 16...Piston 17...Incompressible fluid (pressure oil) 19...
......Rod 19a...Pull stud 21...Display means (pressure gauge) 26...
...Detection means (strain gauge) 27...
...Display means (strain meter) patent applicant Yamazaki Iron Works Co., Ltd. Representative Patent attorney Shinji Aida (one idiot)
Claims (2)
本体にプルスタッドの形成されたロッドを設け、該ロッ
ドに引っ張り力検出手段を接続し、更に前記検出手段に
、検出手段の検出値を表示する表示手段を接続して構成
した工具保持力測定装置。(1) It has a main body formed with a connecting portion to the main shaft, a rod formed with a pull stud is provided on the main body, a tensile force detecting means is connected to the rod, and a detecting means is connected to the detecting means. A tool holding force measuring device configured by connecting a display means to display detected values.
され、シリンダに摺動自在に係合したピストン及び前記
シリンダ内に封入された非圧縮性流体から構成された特
許請求の範囲第１項記載の工具保持力測定装置。(2) The tensile force detection means comprises a cylinder, a piston connected to the rod and slidably engaged with the cylinder, and an incompressible fluid sealed in the cylinder. tool holding force measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13167582A JPS5924944A (en) | 1982-07-27 | 1982-07-27 | Device for measuring tool holding force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13167582A JPS5924944A (en) | 1982-07-27 | 1982-07-27 | Device for measuring tool holding force |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5924944A true JPS5924944A (en) | 1984-02-08 |
| JPH0416306B2 JPH0416306B2 (en) | 1992-03-23 |
Family
ID=15063593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13167582A Granted JPS5924944A (en) | 1982-07-27 | 1982-07-27 | Device for measuring tool holding force |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5924944A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031640U (en) * | 1983-08-08 | 1985-03-04 | 大阪機工株式会社 | Tool tightening force measuring device |
| US4708547A (en) * | 1985-10-14 | 1987-11-24 | Societe Nationale Industrielle Et Aerospatiale | Safety tool-holder for machine-tools |
| JPS637443U (en) * | 1986-06-30 | 1988-01-19 | ||
| US4822220A (en) * | 1985-05-20 | 1989-04-18 | Danielsson Sven Arne | Device for securing tools in metal working machine |
| US5342155A (en) * | 1993-05-26 | 1994-08-30 | Harroun Enterprises | Spindle extension with self-contained pull-stud draw bar assembly |
| US5735651A (en) * | 1994-08-29 | 1998-04-07 | Harroun; Hugh | Spindle extension with self-contained draw bar |
| WO1999065648A1 (en) * | 1998-06-15 | 1999-12-23 | Gühring, Jörg | Device for measuring pulling-in force |
| JP2003039280A (en) * | 2001-07-31 | 2003-02-12 | Kuroda Precision Ind Ltd | Machine tool fastening force measuring device and control method |
| JP2010036261A (en) * | 2008-07-31 | 2010-02-18 | Kuroda Precision Ind Ltd | Holding force measuring device of tool holder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58143144U (en) * | 1982-03-24 | 1983-09-27 | 大隈豊和機械株式会社 | Tool shank for load inspection |
-
1982
- 1982-07-27 JP JP13167582A patent/JPS5924944A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58143144U (en) * | 1982-03-24 | 1983-09-27 | 大隈豊和機械株式会社 | Tool shank for load inspection |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6031640U (en) * | 1983-08-08 | 1985-03-04 | 大阪機工株式会社 | Tool tightening force measuring device |
| US4822220A (en) * | 1985-05-20 | 1989-04-18 | Danielsson Sven Arne | Device for securing tools in metal working machine |
| US4708547A (en) * | 1985-10-14 | 1987-11-24 | Societe Nationale Industrielle Et Aerospatiale | Safety tool-holder for machine-tools |
| JPS637443U (en) * | 1986-06-30 | 1988-01-19 | ||
| US5342155A (en) * | 1993-05-26 | 1994-08-30 | Harroun Enterprises | Spindle extension with self-contained pull-stud draw bar assembly |
| EP0635327A1 (en) * | 1993-05-26 | 1995-01-25 | Harroun Enterprises | Spindle extension with self-contained pull-stud draw bar assembly |
| US5639194A (en) * | 1993-05-26 | 1997-06-17 | Harroun; Hugh | Spindle extension with self-contained draw bar |
| US5735651A (en) * | 1994-08-29 | 1998-04-07 | Harroun; Hugh | Spindle extension with self-contained draw bar |
| WO1999065648A1 (en) * | 1998-06-15 | 1999-12-23 | Gühring, Jörg | Device for measuring pulling-in force |
| JP2003039280A (en) * | 2001-07-31 | 2003-02-12 | Kuroda Precision Ind Ltd | Machine tool fastening force measuring device and control method |
| JP2010036261A (en) * | 2008-07-31 | 2010-02-18 | Kuroda Precision Ind Ltd | Holding force measuring device of tool holder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0416306B2 (en) | 1992-03-23 |
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