JPS6099564A - Tool pressing force detecting apparatus - Google Patents

Tool pressing force detecting apparatus

Info

Publication number
JPS6099564A
JPS6099564A JP20656683A JP20656683A JPS6099564A JP S6099564 A JPS6099564 A JP S6099564A JP 20656683 A JP20656683 A JP 20656683A JP 20656683 A JP20656683 A JP 20656683A JP S6099564 A JPS6099564 A JP S6099564A
Authority
JP
Japan
Prior art keywords
spring
tool
arm
lever
pressing force
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
JP20656683A
Other languages
Japanese (ja)
Inventor
Kazuo Minowa
箕輪 一男
Kyori Kudo
工藤 恭利
Akira Sugawara
彰 菅原
Kazuhiro Ito
一博 伊藤
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.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries 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 Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP20656683A priority Critical patent/JPS6099564A/en
Publication of JPS6099564A publication Critical patent/JPS6099564A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

PURPOSE:To improve the detection precision for a pressing force and widen the detection range and facilitate control by installing a spring and a load cell for detecting the spring force between an arm and a lever which is installed onto the arm and is rotable in the direction reverse to the operation of a tool. CONSTITUTION:When a grindstone 8 is pressed onto a workpiece, a spring case 4 is turned to an antipressed direction side around a turning shaft 2 through a lever 6, and each spring 18, 19 is deformed to balance between a loaded torque, between the lever 6 and a turning arm 7. The amount of variation of the spring force generated by this deformation is detected by a load cell 20 through a pin 16, and the spring force which forms the original point for detection is adjusted and by an adjusting screw 21 and set. Therefore, the amount of deformation of each spring 18, 19 is increased in comparison with the amount of shift of a tool 18 with respect to the arm 7 when the tool 8 is pressed onto the workpiece, and the load applied onto each spring 18, 19 can be reduced in comparison with the tool pressing force, and the pressing force can be detected precisely by the load cell, and detection range can be widened.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、例えばグラインダロボットにおいて、砥石を
加工物に押付ける力を検出するため、ロボットアームの
砥石支持機構として組込み使用される工具押付力検出装
置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a tool pressing force that is incorporated and used as a grindstone support mechanism of a robot arm in order to detect the force that presses a grindstone against a workpiece in a grinder robot, for example. This invention relates to a detection device.

(発明が解決すべき従来技術の問題点)従来、押付スプ
リングにより加工物に工具を押付け、φその際における
押付スプリングの圧縮によシ差動変圧器のコアを移動さ
せることによって工具の押付力を検出しようとした工具
押付力検出装置があるが、この検出装置では、押付力に
対応するスプリングの歪量をコア移動量で検出する構造
であるため、検出精度を向上させるためにはコア移動量
を大きくする必要があシ、どうしても構造的に大きくな
ってしまうという不具合を免れないO (発明の目的) 本発明は、前記従来の問題点を解決するために創案され
たもので、加工物に対して工具を押付は等する力(本願
明細書では単に工具押付力と総称する。)をロードセル
で精度良く検出すると共にその検出範囲を大きくするこ
とができ、これによって工具押付力を制御し易くするこ
とを目的とする。
(Problems in the Prior Art to be Solved by the Invention) Conventionally, a tool is pressed against a workpiece by a pressing spring, and the pressing force of the tool is applied by moving the core of the differential transformer due to the compression of the pressing spring at that time. There is a tool pressing force detection device that attempts to detect tool pressing force, but this detection device has a structure that detects the amount of spring distortion corresponding to the pressing force by the amount of core movement. It is necessary to increase the amount of the workpiece, and the problem of structurally large size is unavoidable. The load cell can accurately detect the force that is the same when pressing the tool against the load cell (hereinafter simply referred to as the tool pressing force), and the detection range can be enlarged, thereby controlling the tool pressing force. The purpose is to make it easier.

(発明の構成ン 本発明の工具押付力検出装置は、加工物に対して工具を
アームによジアーム方向と直角方向に押付は等するよう
にした加工装置において、前記アームに、工具をレバー
先端に備えた反工具作用方向側へ回動可能なレバーを取
付け、該レバーの回動中心から工具作用点までの距離(
L)よシ短い距離(L′)に位置するよう、レバーとア
ームとの間にスプリングと該スプリング力を検出可能な
ロードセルとを介装したことを特徴とする。
(Component of the Invention) The tool pressing force detection device of the present invention is provided in a processing device in which a tool is pressed against a workpiece by an arm in a direction perpendicular to the direction of the arm. Attach a lever that can be rotated in the opposite direction of tool action, and determine the distance from the center of rotation of the lever to the point of tool action (
L) A spring and a load cell capable of detecting the spring force are interposed between the lever and the arm so as to be located at a much shorter distance (L').

(実 施 例) 以下、本発明の一実施例を、グラインダロボットのアー
ム先端に備えた砥石支持機構を示す第1図および第2図
によシ説明する。
(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2, which show a grindstone support mechanism provided at the tip of an arm of a grinder robot.

図中1は先端アームで、該先端アーム1は前後、左右、
上下に平行移動可能なロボットアームの先端に装着され
ている。この先端アーム1の先端部は、回転軸2が軸受
3によシ両端支持された状態で回転可能な構造となって
いる。この回転軸2にはスプリングケース4が軸受5に
よ多回転可能に取付けられ、該スプリングケース4には
レバー6が取付けられている。また、回転軸2には、回
転軸2方向と直角方向に延びる回動アーム7が中央部で
一体に連結されている。レバー6の先端部には、砥石8
を出力軸に装着した電動またはエアグラインダ9が砥石
8を回転可能に装着されている。前記スプリングケース
4には、回転軸2の中心から等距離(L′)の位置にス
プリング収納部11.12とが設けられている。スプリ
ング収納部11.12には蓋13が装着され、該蓋13
とスプリング収納部11.12の底部中央とにはガイド
孔14.15が設けられている。前記スプリング収納部
11.12には、ガイド孔14゜15を介して蓋13側
に突出するピン16.17が配置され、かつ、該ピン1
6 、17に突出力を付勢するスプリング18.19が
収められている。回動アーム7の砥石8側端部には、ビ
ン16が当接し、該ビン16を介してスプリング18の
力を検出するロードセル20が装着されている。
In the figure, 1 is the tip arm, and the tip arm 1 is front and rear, left and right,
It is attached to the tip of a robot arm that can move vertically in parallel. The distal end portion of the distal end arm 1 is configured to be rotatable with a rotating shaft 2 supported at both ends by bearings 3. A spring case 4 is rotatably mounted on a bearing 5 on the rotating shaft 2, and a lever 6 is mounted on the spring case 4. Further, a rotating arm 7 extending in a direction perpendicular to the direction of the rotating shaft 2 is integrally connected to the rotating shaft 2 at the center thereof. A grindstone 8 is attached to the tip of the lever 6.
An electric or air grinder 9 having a grinding wheel 8 mounted on its output shaft is mounted so that the grindstone 8 can be rotated. The spring case 4 is provided with spring storage portions 11 and 12 at positions equidistant (L') from the center of the rotating shaft 2. A lid 13 is attached to the spring storage portion 11.12, and the lid 13
A guide hole 14.15 is provided at the center of the bottom of the spring housing 11.12. A pin 16.17 that protrudes toward the lid 13 side through the guide hole 14.15 is disposed in the spring storage portion 11.12, and the pin 16.17
6 and 17 house springs 18 and 19 that bias the ejection force. A load cell 20 is attached to the end of the rotary arm 7 on the side of the grindstone 8, which is in contact with a bottle 16 and which detects the force of the spring 18 via the bottle 16.

回動アーム7の反砥石8側端部にはピン17に当接する
調整ネジ21が螺入されている。回転軸2の一端には、
該回転軸2を介して回動アーム7を傾動させる駆動装置
22(第1図に歯車機構の一部のみが示される。)が接
続されておシ、該駆動装置22を介して回動アーム7は
例えば先端アーム1方向に治った第2図に示す状態に保
持されている。
An adjustment screw 21 that abuts the pin 17 is screwed into the end of the rotating arm 7 on the side opposite to the grindstone 8 . At one end of the rotating shaft 2,
A driving device 22 (only a part of the gear mechanism is shown in FIG. 1) is connected to tilt the rotating arm 7 via the rotating shaft 2. 7 is maintained in the state shown in FIG. 2, for example, with the distal arm 1 directed.

(作 用) 砥石8を図示しない加工物に押付けると、レバー6を介
しスプリングケース4が回転軸2を中心として反押付方
向側に回動し、該レバー6と回動アーム7との間でスプ
リング18.19が負荷トルクと釣合うように変形する
。この変形によって生じたスプリング力の変化量は、ビ
ン16を介してロードセル20によシ検出される。検出
原点となるスプリング力は、調整ネジ21によシ調整設
定される。
(Function) When the grindstone 8 is pressed against a workpiece (not shown), the spring case 4 rotates in the opposite pressing direction around the rotating shaft 2 via the lever 6, and the space between the lever 6 and the rotating arm 7 is rotated. The springs 18 and 19 are deformed to balance the load torque. The amount of change in spring force caused by this deformation is detected by the load cell 20 via the bottle 16. The spring force serving as the detection origin is adjusted and set using the adjustment screw 21.

次に、加工物に対する押付けで砥石8の先端に直角に作
用する負荷Fと、ロードセル20によシ検出されるスプ
リング力(正確には変化量)FIとの関係をめる。尚、
第3図は第2図に示された検出装置部分の概要を線図的
に示す。この第3図中、23は回転軸2の中心と負荷F
が作用する砥石8の先端とを結ぶ線分(長さL)を示す
Next, the relationship between the load F acting perpendicularly on the tip of the grindstone 8 due to pressing against the workpiece and the spring force (more precisely, the amount of change) FI detected by the load cell 20 is determined. still,
FIG. 3 diagrammatically shows an overview of the detection device part shown in FIG. In this Figure 3, 23 is the center of the rotating shaft 2 and the load F.
shows a line segment (length L) connecting the tip of the grindstone 8 on which it acts.

負荷Fが作用すると、レバー6は、出力軸2を中心とし
て回動し、スプリング力作用点位置と工具作用点位置で
反工具作用方向側にδ、Xだけ変位し、釣合い状態が得
られる。第4図はこのような負荷状態を、レバー6が回
動せず、回動アーム7が実線位置から想像線位置へ回動
した状況で牙、す。この第4図中、F、 、 F2はス
プリング力、k、 、 k、はバネ定数、L′ は回転
軸2からスプリング力作用点位置までのレバー6方向に
沿った距離を示す。
When the load F is applied, the lever 6 rotates around the output shaft 2, and is displaced by δ and X in the opposite tool action direction between the spring force action point position and the tool action point position, and a balanced state is obtained. FIG. 4 shows such a loaded state with the lever 6 not rotating and the rotating arm 7 rotating from the solid line position to the imaginary line position. In FIG. 4, F, , F2 are spring forces, k, , k are spring constants, and L' is a distance along the direction of the lever 6 from the rotating shaft 2 to the point of application of the spring force.

しかして、回転軸2のまわシの力の釣合い関係式は、線
分23に直角に作用する負荷Fの成分をFnとすれば、 L’ Fn−−(Ft −Ft) ことで、 F、=十に、δ F =−k δ であるから、 L′ Fn = −(k、 + k、)δ ここで、 スプリング18.19に同一バネ定数(k、=に2)の
ものを使用すれば、 となる。
Therefore, the balance relational expression of the force of rotation of the rotating shaft 2 is as follows: If Fn is the component of the load F acting perpendicularly to the line segment 23, then L' Fn--(Ft - Ft), F, = 10, and δ F = -k δ, so L' Fn = -(k, + k,) δ Here, use springs with the same spring constant (k, = 2) as springs 18.19. Then, .

一方、力の作用点とスプリング力作用点の位置の変位置
に関しては、 L X−一 δ L′ であるから、Xの位置を制御する上では機械的ゲ 4゜
インL / L’ が小さい方が望ましいが、L/L’
を小さくするとaは大きくなるが、ロードセルを用いる
事によシ、δの変位置にはは関係なく力Fを検出できる
On the other hand, regarding the displacement of the position of the force application point and the spring force application point, L It is more desirable, but L/L'
If a is made smaller, a becomes larger, but by using a load cell, the force F can be detected regardless of the displacement position of δ.

一方、(1)式よシカの検出量F、はL/L’ を小さ
くすると小さくなるが、それに対応した検出範囲のロー
ドセルを選択する事によシ検出器の精度を上げる事がで
きる。
On the other hand, according to equation (1), the deer detection amount F becomes smaller as L/L' is reduced, but the accuracy of the deer detector can be improved by selecting a load cell with a corresponding detection range.

(発明の効果) 以上の通シ、本発明は、梃の原理を有効に利用して、加
工物に対して工具8を押付は等する時工具8がアーム7
に対して移動するit (X)に比べてスプリング18
.19の変形量(δ)を大きくし、かつ、工具押付力F
に比べてスプリング18.19に作用する負荷F、 、
 F2を小さくすることができる構成であるから、ロー
ドセル20によシ工具押付力を精度良く検出でき、かつ
、その検出範囲を大きくできる。従って工具押付力を制
御し易くなシ、ロボットによる作条の自動化に役立つ。
(Effects of the Invention) As described above, the present invention effectively utilizes the principle of leverage, and when the tool 8 is pressed evenly against the workpiece, the arm 7
Spring 18 compared to it (X) moving against
.. 19, the amount of deformation (δ) is increased, and the tool pressing force F
The load F acting on the spring 18.19 compared to ,
Since the configuration is such that F2 can be reduced, the tool pressing force can be accurately detected by the load cell 20, and the detection range can be increased. Therefore, it is easy to control the tool pressing force, which is useful for automation of cutting by robots.

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

第1図、第2図は本発明の実施例を要部断面にて示す平
面図、側面図、第3図、第4図は作用説明用の概要図で
ある。 1・・先端アーム、2・・回転軸、 3.5・・軸受、4・・スプリングケース、6・・レバ
ー、7・・回動アーム、8・・砥石、9・・グラインダ
、11.12・・スプリング収納部、13・・蓋、14
.15・・ガイド孔、16.17−@ピン、18,19
・・スプリング、20・・〜ロードセル、21・・調整
ネジ、22・・駆動歯車。
FIGS. 1 and 2 are a plan view and a side view showing an embodiment of the present invention in cross section of essential parts, and FIGS. 3 and 4 are schematic diagrams for explaining the operation. 1. Tip arm, 2. Rotating shaft, 3.5. Bearing, 4. Spring case, 6. Lever, 7. Rotating arm, 8. Grindstone, 9. Grinder, 11.12・・Spring storage part, 13・・Lid, 14
.. 15...Guide hole, 16.17-@pin, 18,19
・・Spring, 20・・Load cell, 21・・Adjustment screw, 22・・Drive gear.

Claims (1)

【特許請求の範囲】[Claims] 加工物に対して工具をアームによジアーム方向と直角方
向に押付は等するようにした加工装置において、前記ア
ームに、工具をレバー先端に備えた反工具作用方向側へ
回動可能なレバーを取付け、該レバーの回動中心から工
具作用点までの距離(L)よシ短い距離(L′)に位置
するよう、レバーとアームとの間にスプリングと該スプ
リング力を検出可能なロードセルとを介装したことを特
徴とする工具押付力検出装置。
In a processing device in which a tool is pressed against a workpiece by an arm in a direction perpendicular to the direction of the arm, the arm is provided with a lever that is rotatable in a direction opposite to the tool action direction and has a tool at the tip of the lever. Install a spring and a load cell capable of detecting the spring force between the lever and the arm so that the lever is located at a distance (L') shorter than the distance (L) from the center of rotation of the lever to the point of application of the tool. A tool pressing force detection device characterized by being interposed.
JP20656683A 1983-11-02 1983-11-02 Tool pressing force detecting apparatus Pending JPS6099564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20656683A JPS6099564A (en) 1983-11-02 1983-11-02 Tool pressing force detecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20656683A JPS6099564A (en) 1983-11-02 1983-11-02 Tool pressing force detecting apparatus

Publications (1)

Publication Number Publication Date
JPS6099564A true JPS6099564A (en) 1985-06-03

Family

ID=16525510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20656683A Pending JPS6099564A (en) 1983-11-02 1983-11-02 Tool pressing force detecting apparatus

Country Status (1)

Country Link
JP (1) JPS6099564A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63127827A (en) * 1986-11-18 1988-05-31 Kobe Steel Ltd Electrolytic buffing compound polishing device
CN106959185A (en) * 2017-03-10 2017-07-18 浙江华电器材检测研究所 Jack handle operates force test system
US11344994B2 (en) * 2017-07-18 2022-05-31 Fabio Perini S.P.A. Grinding unit for cutting machine and machine comprising said unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484690A (en) * 1977-12-19 1979-07-05 Kiyousan Kinzoku Kougiyou Kk Automatic polishing machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5484690A (en) * 1977-12-19 1979-07-05 Kiyousan Kinzoku Kougiyou Kk Automatic polishing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63127827A (en) * 1986-11-18 1988-05-31 Kobe Steel Ltd Electrolytic buffing compound polishing device
CN106959185A (en) * 2017-03-10 2017-07-18 浙江华电器材检测研究所 Jack handle operates force test system
US11344994B2 (en) * 2017-07-18 2022-05-31 Fabio Perini S.P.A. Grinding unit for cutting machine and machine comprising said unit

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