JPH02284833A - Thread fastening method - Google Patents
Thread fastening methodInfo
- Publication number
- JPH02284833A JPH02284833A JP10493789A JP10493789A JPH02284833A JP H02284833 A JPH02284833 A JP H02284833A JP 10493789 A JP10493789 A JP 10493789A JP 10493789 A JP10493789 A JP 10493789A JP H02284833 A JPH02284833 A JP H02284833A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- thread fastening
- lift
- bit
- motor
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 230000003028 elevating effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
Landscapes
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はねじ締め方法に関し、特にねじ締めヘッドの送
り制御方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a screw tightening method, and more particularly to a screw tightening head feed control method.
従来の技術
従来の自動ねじ締め機においては、ねじ締めヘッドをワ
ークに対して遠近方向に移動駆動する手段として、一定
の加圧力を加えることが容易にできるためにエアシリン
ダ装置が一般的に用いられている。Conventional technology In conventional automatic screw tightening machines, an air cylinder device is generally used as a means to move the screw tightening head in the distance direction relative to the workpiece because it can easily apply a constant pressure force. It is being
又、ねじ締めヘッドをモータ駆動するものにおいては、
ビットとねじ締めヘッド本体との間に緩衝用のばねを介
装した状態で、ねじ締めヘッドを一定速度で移動させる
ように構成されている。In addition, for those that drive the screw tightening head with a motor,
The screw tightening head is configured to move at a constant speed with a buffer spring interposed between the bit and the screw tightening head main body.
発明が解決しようとする課題
ところが、エアシリンダ装置を用いた場合、移動中の速
度変更が極めて困難であるため、移動速度を速くしてね
じ締め作業の高速化を図ると、ねじ込み時の加圧力が過
大になってしまう。その結果、この加圧力によって発生
する摩擦力のため、締め付はトルクが影響を受け、締め
付はトルクが安定せず、場合によってはねじが浮き上が
ったまま締め付は動作が終了してねじ込み不良を発生す
る恐れがあるという問題がある。Problem to be Solved by the Invention However, when using an air cylinder device, it is extremely difficult to change the speed during movement. becomes excessive. As a result, due to the frictional force generated by this pressurizing force, the tightening torque is affected, the tightening torque becomes unstable, and in some cases, the tightening operation ends with the screw floating, resulting in a screw-in failure. There is a problem that this may occur.
又、モータ駆動により一定速度で移動させるようにする
とともに緩衝用ばねを介装したものでは、大小種々のね
じを締め付ける場合にばねの交換を行わないと、適正な
加圧力を印加することができず、同じくねじ込み不良を
発生する恐れがあるという問題がある。In addition, if the screw is moved at a constant speed by motor drive and a buffer spring is installed, the appropriate pressure cannot be applied unless the spring is replaced when tightening screws of various sizes. Similarly, there is a problem that screw-in failure may occur.
本発明は上記従来の問題点に鑑み、ねじ締めビットをね
じ締め開始位置までは高速で移動させることができ、か
つ適正なねじ込み状態を確保できるねじ締め方法の提供
を目的とする。In view of the above conventional problems, the present invention aims to provide a screw tightening method that allows a screw tightening bit to be moved at high speed to a screw tightening starting position and that can ensure a proper screwed state.
課題を解決するための手段
本発明は上記目的を達成するために、回転可能なビット
によりねじをワークにねじ締めする方法であって、ねじ
の先端がワークに達してねじ締めを開始する位置まで所
定の速度で前記ビットを移動させ、その後ねじのワーク
に対するねじ締めが完了するまでねじの種類とねじ込み
位置に応じて所定の加圧力を印加して前記ビットを移動
させることを特徴とする。Means for Solving the Problems In order to achieve the above object, the present invention provides a method for tightening a screw to a workpiece using a rotatable bit, the method comprising: a screw tightening process until the tip of the screw reaches the workpiece and the screw tightening is started; The bit is moved at a predetermined speed, and then the bit is moved by applying a predetermined pressing force depending on the type of screw and the screwing position until the screw is completely tightened onto the workpiece.
作 用
本発明によると、ねじ締めを開始する位置までは速度制
御によって適切な範囲で可能な限り高速で移動させ、ね
じ締め開始後ねじ締め完了まではねじの種類とねじ込み
位置に応じて加圧力を制御して移動させるので、ねじの
種類に応じた加圧力でねじ込むことができ、どのような
種類のねじの場合でも常に能率的に適切なねじ込み状態
を確保できる。According to the present invention, the screw is moved as fast as possible within an appropriate range by speed control until it reaches the position where screw tightening is started, and the pressurizing force is applied depending on the type of screw and the screw position after screw tightening is started and until the screw tightening is completed. Since the screws are controlled and moved, the screws can be screwed in with a pressing force that is appropriate for the type of screw, and an appropriate screwing state can always be ensured efficiently regardless of the type of screw.
実 施 例
以下、本発明の一実施例を第１図及び第２図に基づいて
説明する。Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 and 2.
まず、ねじ締め機におけるねじ締めヘッドの昇降駆動部
の概略構成を第２図により説明する。１はねじ締めヘッ
ド、ｌａはそのビットである。ピッｌ−１ａは、サーボ
モータから成るビット回転用モータ２にて回転駆動され
、その回転位置がエンコーダ３にて検出されている。こ
のねじ締めヘッド１は昇降ガイド４にて昇降自在に案内
されるとともに昇降ねじ軸５に螺合させたナツト６が固
定されている。７は昇降ねじ軸５を回転駆動するサーボ
モータから成る昇降用モータであり、その回転位置を検
出するエンコーダ８が取付けられている。昇降用モータ
７の出力軸に取付けられた歯車９ａと昇降ねじ軸５の一
端に取付けられた歯車９ｂとが歯付きベルト１０を介し
て連結されている１１は昇降用モータ７の制御回路で、
この制御回路１１から出力された制御信号に基づいて駆
動回路１２を介して昇降用モータ７が駆動制御される。First, a schematic configuration of a lifting/lowering driving section of a screw tightening head in a screw tightening machine will be explained with reference to FIG. 1 is a screw tightening head, and la is its bit. The pill-1a is rotationally driven by a bit rotation motor 2 consisting of a servo motor, and its rotational position is detected by an encoder 3. This screw tightening head 1 is guided by an elevating guide 4 so as to be movable up and down, and a nut 6 screwed onto an elevating screw shaft 5 is fixed. Reference numeral 7 denotes an elevating motor consisting of a servo motor that rotationally drives the elevating screw shaft 5, and an encoder 8 is attached to detect the rotational position of the elevating motor. 11 is a control circuit for the lifting motor 7, in which a gear 9a attached to the output shaft of the lifting motor 7 and a gear 9b attached to one end of the lifting screw shaft 5 are connected via a toothed belt 10;
Based on the control signal output from the control circuit 11, the lifting motor 7 is driven and controlled via the drive circuit 12.
制御回路１１には、ピント回転用モータ２及び昇降用モ
ータ７のエンコーダ３及び８の出力信号、ねじ締めを行
うべきねじの長さ、ねじ締め高さ位置、及びねじ径、ね
じピッチ、小ねじやタンピングねし等のねじの種別など
のねじの種類に関するねじ締めデータが入力されている
。The control circuit 11 includes the output signals of the encoders 3 and 8 of the focusing rotation motor 2 and the lifting motor 7, the length of the screw to be tightened, the screw tightening height position, the screw diameter, the screw pitch, and the machine screw. Screw tightening data regarding types of screws such as types of screws, tamping screws, etc. is input.
次に、動作を第１図を参照しながら説明する。Next, the operation will be explained with reference to FIG.
まず、図示しないｘ−Ｙ軸移動手段にてねじ締めヘッド
１がワークのねじ締め位置の上方に位置決めされる。First, the screw tightening head 1 is positioned above the screw tightening position of the workpiece by means of an x-Y axis moving means (not shown).
その後、ビット回転用モータ２が図示しない制御回路に
より制御されて、予め設定された締め付はトルク等のね
じ締め条件とねじの種類に応じたねじ締めパターンに基
づいて回転駆動される。Thereafter, the bit rotation motor 2 is controlled by a control circuit (not shown), and the preset tightening is rotationally driven based on screw tightening conditions such as torque and a screw tightening pattern depending on the type of screw.
一方、制御回路１１にて駆動回路１２を介して昇降用モ
ータ７が起動され、ねじ締めヘッドｌが第１図（ａ）に
示すように原点位置である７０位置からワークに対して
ねじ込みを開始するＺ１位置に向かって第１図（ｂ）に
示すように高速の速度Ｖで下降する。その下降途中でね
じが吸着され、ビットｌａにねじが係合する。On the other hand, the lifting motor 7 is started in the control circuit 11 via the drive circuit 12, and the screw tightening head l starts screwing into the workpiece from position 70, which is the origin position, as shown in FIG. 1(a). It descends at a high speed V toward the Z1 position, as shown in FIG. 1(b). During its descent, the screw is attracted and engages with the bit la.
ねじ込み開始位置Ｚ１は、制御回路１１において入力さ
れたねじ長さとワークのねじ締め高さ位置から算出され
る。ねじ締めヘッドｌがＺ１位置に達すると、その後は
第１図（ｂ）に示すようにねじ締めが完了する２２位置
まで、速度制御からトルク制御に切換えられて下降動作
が制御される。即ち、第１図（ｂ）に実線、破線、或い
は一線鎖線等で示すように、ねじ締めを行うべきねしの
種類に対応した所定のトルクパターンに基づいてねじ込
み位置に対応したトルクにて下降駆動される。ねじ込み
位置は、ビット回転用モータ２のエンコーダ３から制御
回路１１に入力された信号に基づいて検出される。こう
して、ビットｌａにねじの種類とねじ込み位置に応じた
所定の加圧力が印加された状態でねじ締めが行われる。The screwing start position Z1 is calculated from the screw length input in the control circuit 11 and the screwing height position of the workpiece. When the screw tightening head l reaches the Z1 position, the speed control is then switched to torque control and the lowering operation is controlled until the screw tightening is completed at position 22, as shown in FIG. 1(b). That is, as shown in FIG. 1(b) by a solid line, a broken line, a dashed line, etc., the screw is lowered with a torque corresponding to the screwing position based on a predetermined torque pattern corresponding to the type of screw to be tightened. Driven. The screwing position is detected based on a signal input from the encoder 3 of the bit rotation motor 2 to the control circuit 11. In this way, screw tightening is performed with a predetermined pressing force applied to the bit la depending on the type of screw and the screwing position.
なお、上記ビットｌａの加圧力制御は、原理的には昇降
用モータ７の出力トルクを制御して行う゛のであるが、
モータの出力トルクを検出して制御しようとするとトル
ク検出器が必要となってコスト高となり、一方で電流と
トルクは略比例した関係にあるので、実際には電流を制
御することによって加圧力を制御している。In principle, the pressing force of the bit la is controlled by controlling the output torque of the lifting motor 7.
If you try to detect and control the output torque of the motor, you will need a torque detector, which will increase the cost. On the other hand, since current and torque are approximately proportional to each other, it is actually possible to control the pressurizing force by controlling the current. It's in control.
一方、ビット回転用モータ２は上記の如く所定のねし締
めパターンに基づいて回転駆動されるが、その最終段階
では電流値を漸増させてねじ締めトルクを漸増させ、所
定のトルク値に達するとそのトルクで所定時間締め付け
ることによってねじ締めが完了する。On the other hand, the bit rotation motor 2 is driven to rotate based on the predetermined screw tightening pattern as described above, but in the final stage, the current value is gradually increased to gradually increase the screw tightening torque, and when the screw tightening torque reaches the predetermined torque value, Screw tightening is completed by tightening with that torque for a predetermined time.
ねじ締めが完了すると、昇降用モータ７を逆転駆動し、
高速で原点位Ｗｉｔ ｚ ｏまで復帰させることによっ
て１つのねじ締め動作が終了する。When the screw tightening is completed, the lifting motor 7 is driven in reverse,
One screw tightening operation is completed by returning to the home position Wizzo at high speed.
以上のように、本実施例によると、ねじ込み開始まで高
速降下させ、その後は適正な加圧力を加えてねじ込み動
作ができ、精密、微小ねじの自動ねじ締めも確実にかつ
安定して行える。As described above, according to this embodiment, the screw can be lowered at high speed until the start of screwing, and then the screwing operation can be performed by applying an appropriate pressing force, and automatic screw tightening of precision and minute screws can also be performed reliably and stably.
発明の効果
本発明のねじ締め方法によれば、以上の説明から明らか
なように、ねじ締めを開始する位置までは速度制御によ
って適切な範囲で可能な限り高速で移動させ、ねじ締め
開始後はねじ締め完了までねじの種類とねじ込み位置に
応じて加圧力を制御するので、精密ねじや微小ねしなど
、どのような種類のねじの場合でも能率的に適切なねじ
込み状態でねじ締めができるという大なる効果を発揮す
る。Effects of the Invention According to the screw tightening method of the present invention, as is clear from the above explanation, the screw is moved as fast as possible within an appropriate range by speed control to the position where screw tightening is started, and after the screw tightening is started, Since the pressurizing force is controlled according to the type of screw and the screwing position until the screw is tightened, it is possible to efficiently tighten any type of screw, such as precision screws or micro screws, with the appropriate screwing state. It has a great effect.
第１図及び第２図は本発明の一実施例を示し、第１図（
ａ）、（ｂ）はねじ締め工程におけるねじ締めヘッドの
昇降動作とその速度制御の説明図、第２図は昇降駆動手
段の概略構成図である。
１・・・・・・ねじ締めヘッド、１ａ・・・・・・ビッ
ト、５・・・・・・昇降ねし軸、７・・・・・・昇降用
モータ、１１・・・・・・制御回路。
代理人 弁理士 粟野 重孝 ほか１名ス
第１図
第２図1 and 2 show an embodiment of the present invention, and FIG. 1 (
a) and (b) are explanatory diagrams of the raising and lowering operation of the screw tightening head in the screw tightening process and its speed control, and FIG. 2 is a schematic diagram of the construction of the raising and lowering driving means. 1... Screw tightening head, 1a... Bit, 5... Lifting screw shaft, 7... Lifting motor, 11... control circuit. Agent: Patent attorney Shigetaka Awano and one other person Figure 1 Figure 2
Claims (1)
法であって、ねじの先端がワークに達してねじ締めを開
始する位置まで所定の速度で前記ビットを移動させ、そ
の後ねじのワークに対するねじ締めが完了するまでねじ
の種類とねじ込み位置に応じて所定の加圧力を印加して
前記ビットを移動させることを特徴とするねじ締め方法
。A method of tightening a screw to a workpiece using a rotatable bit, in which the bit is moved at a predetermined speed to a position where the tip of the screw reaches the workpiece and screw tightening starts, and then the screw is tightened to the workpiece. A screw tightening method characterized in that the bit is moved by applying a predetermined pressing force depending on the type of screw and the screwing position until completion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1104937A JP2805820B2 (en) | 1989-04-25 | 1989-04-25 | Screw tightening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1104937A JP2805820B2 (en) | 1989-04-25 | 1989-04-25 | Screw tightening method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02284833A true JPH02284833A (en) | 1990-11-22 |
| JP2805820B2 JP2805820B2 (en) | 1998-09-30 |
Family
ID=14394009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1104937A Expired - Fee Related JP2805820B2 (en) | 1989-04-25 | 1989-04-25 | Screw tightening method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805820B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016215293A (en) * | 2015-05-18 | 2016-12-22 | オークマ株式会社 | Clamp device |
| CN114770080A (en) * | 2022-03-24 | 2022-07-22 | 苏州朗坤自动化设备股份有限公司 | Igniter end thread locking mechanism of combustion chamber |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5837769B2 (en) * | 2011-07-08 | 2015-12-24 | 日東精工株式会社 | Automatic screw tightening device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5187899A (en) * | 1975-01-30 | 1976-07-31 | Aisin Seiki | SHIMETSUKETORUKUSEIGYOSOCHI |
| JPS61284335A (en) * | 1985-06-07 | 1986-12-15 | Mita Ind Co Ltd | Automatic screw driver |
-
1989
- 1989-04-25 JP JP1104937A patent/JP2805820B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5187899A (en) * | 1975-01-30 | 1976-07-31 | Aisin Seiki | SHIMETSUKETORUKUSEIGYOSOCHI |
| JPS61284335A (en) * | 1985-06-07 | 1986-12-15 | Mita Ind Co Ltd | Automatic screw driver |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016215293A (en) * | 2015-05-18 | 2016-12-22 | オークマ株式会社 | Clamp device |
| CN114770080A (en) * | 2022-03-24 | 2022-07-22 | 苏州朗坤自动化设备股份有限公司 | Igniter end thread locking mechanism of combustion chamber |
| CN114770080B (en) * | 2022-03-24 | 2023-10-13 | 苏州朗坤自动化设备股份有限公司 | Igniter end thread locking mechanism of combustion chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2805820B2 (en) | 1998-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |