JPS5853991B2 - It's hard to see what's going on in the world. - Google Patents

It's hard to see what's going on in the world.

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Publication number
JPS5853991B2
JPS5853991B2 JP50075983A JP7598375A JPS5853991B2 JP S5853991 B2 JPS5853991 B2 JP S5853991B2 JP 50075983 A JP50075983 A JP 50075983A JP 7598375 A JP7598375 A JP 7598375A JP S5853991 B2 JPS5853991 B2 JP S5853991B2
Authority
JP
Japan
Prior art keywords
power
tightening
electric motor
value
wrench
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.)
Expired
Application number
JP50075983A
Other languages
Japanese (ja)
Other versions
JPS51151900A (en
Inventor
統治 宇土
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.)
Sumiden Transmission and Distribution Systems Products Corp
Original Assignee
Asahi Kinzoku Seiko Co 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 Asahi Kinzoku Seiko Co Ltd filed Critical Asahi Kinzoku Seiko Co Ltd
Priority to JP50075983A priority Critical patent/JPS5853991B2/en
Publication of JPS51151900A publication Critical patent/JPS51151900A/en
Publication of JPS5853991B2 publication Critical patent/JPS5853991B2/en
Expired legal-status Critical Current

Links

Description

【発明の詳細な説明】 本発明は特公昭52−36639号に記載された。[Detailed description of the invention] The present invention was described in Japanese Patent Publication No. 52-36639.

ボルト軸力の一定値締付装置の改良に関するもので、よ
り経済的なボルト軸力の一定値締付装置を提供するもの
である。
This invention relates to an improvement of a constant value tightening device for bolt axial force, and provides a more economical constant value tightening device for bolt axial force.

特公昭52−36639号には動力レンチの出力軸の回
転速度を締付負荷の増大傾向に応じて自動的に追従低下
させ得る締付装置によりボルト・セットを締付ける場合
、ボルト締付力(軸力ともいう)Fと締付経過時間に対
する前記の回転速度と締付負荷トルクとの乗算動力値の
積分値である動力レンチの所要集積エネルギーQとが比
例関係にあることが記載されている。
Japanese Patent Publication No. 52-36639 discloses that when tightening a bolt set using a tightening device that can automatically reduce the rotational speed of the output shaft of a power wrench according to the increasing tendency of the tightening load, the bolt tightening force (shaft It is stated that there is a proportional relationship between the required integrated energy Q of the power wrench, which is the integral value of the power value multiplied by the rotational speed and the tightening load torque with respect to the elapsed tightening time.

又、動力レンチを電動モーターにて駆動する場合に於て
は、動力レンチの出力軸側の量である回転速度と出力ト
ルクの乗算動力値に比例関係となる動力レンチの入力側
の量である電流と電圧の積である直流電力又は電流と電
圧の積にさらに負荷の力率を乗じた交流電力を締付経過
時間について積分した所要集積電力量Qlで前記の集積
エネルギーQを代行させても前記の軸力Fとの比例関係
が成立する事を実験により確認した。
In addition, when the power wrench is driven by an electric motor, the amount on the input side of the power wrench is proportional to the power value multiplied by the rotational speed and output torque, which is the amount on the output shaft side of the power wrench. Even if the integrated energy Q is replaced by the required integrated power Ql obtained by integrating DC power, which is the product of current and voltage, or AC power, which is the product of current and voltage multiplied by the power factor of the load, over the elapsed tightening time. It was confirmed through experiments that the proportional relationship with the axial force F described above holds true.

従って、前記動力レンチの集積エネルギーの相当量であ
る締付所要集積電力量を積算電力量計の回転可動部の集
積回転角変位量として締付装置側で設定することにより
ボルト・セットの締付を一定の締付力で行って、多数か
らなるボルト・セット全数の締付軸力を保証することが
できるのである。
Therefore, the bolt set can be tightened by setting the integrated power required for tightening, which is equivalent to the integrated energy of the power wrench, as the integrated rotational angular displacement of the rotary movable part of the integrated watt-hour meter. By performing this with a constant tightening force, it is possible to guarantee the tightening axial force of all bolt sets consisting of a large number of bolts.

本発明は上記の実験結果に基づいて、ボルト・セットの
軸力を直接制御する目的にて動力レンチを駆動する電動
モーターと、前記モーターに電気を供給する電源と、動
力レンチの出力軸の回転速度とトルクとの関係をボルト
・セットの定数因子に応じて一定函数として計画し、前
記出力軸の回転速度を締付負荷の増大傾向に応じて順次
自動的に追従低下させることによって、前記出力軸の動
力値を締付負荷トルクの変動に対して常に一定値に近似
させ得る自動変速装置とを備え、さらに電力計の回転可
動部の回転角速度である単位時間内の微小回転角通過度
数を締付経過時間に渡って積算した前記回転可動部の集
積回転角変位量を所要集積電力量(ワット時)とする積
算電力計と、前記動力レンチの所要集積電力量が設定値
に達したことを検知した比較器から発信される信号にて
作動する電気開閉器とを前記電動モーターの入力側回路
に設け、前記の所要集積電力量が設定値に達した時点で
動力レンチの駆動用電動モーターに供給する電力を遮断
する動力レンチによるボルト軸力の一定値締付装置を提
供する。
Based on the above experimental results, the present invention provides an electric motor that drives a power wrench for the purpose of directly controlling the axial force of a bolt set, a power source that supplies electricity to the motor, and a rotation of the output shaft of the power wrench. By planning the relationship between speed and torque as a constant function depending on the constant factor of the bolt set, and automatically decreasing the rotational speed of the output shaft in accordance with the increasing tendency of the tightening load, the output can be increased. It is equipped with an automatic transmission device that can always approximate the power value of the shaft to a constant value despite fluctuations in the tightening load torque, and furthermore, it is equipped with an automatic transmission device that can always approximate the power value of the shaft to a constant value despite fluctuations in the tightening load torque. an integrated wattmeter that determines the integrated rotational angular displacement amount of the rotary movable part accumulated over the elapsed tightening time as the required integrated power amount (watt hours), and that the required integrated power amount of the power wrench has reached a set value. An electric switch that is activated by a signal transmitted from a comparator that detects this is provided in the input side circuit of the electric motor, and when the required integrated power amount reaches a set value, the electric motor for driving the power wrench is activated. Provided is a device for tightening bolt axial force to a constant value using a power wrench that cuts off power supplied to the bolt.

さらに、本発明は前記の装置において、動力レンチの駆
動用電動モーターに供給される電流値を検出する電流検
出器と、前記駆動用電動モーターの所要電流値が設定値
に達したことを検知した比較器から発信される信号にて
作動する電気開閉器とを前記電動モーターの入力側回路
に設け、前記の電流値が設定値に達した時点から電動モ
ーターへの供給電力の積算を開始させる機構を備えるボ
ルト軸力の一定値締付装置を提供するものである。
Further, in the above device, the present invention includes a current detector for detecting a current value supplied to the electric motor for driving the power wrench, and a current detector for detecting that the required current value for the electric motor for driving has reached a set value. A mechanism in which an electric switch operated by a signal transmitted from a comparator is provided in the input side circuit of the electric motor, and the integration of power supplied to the electric motor is started from the time when the current value reaches a set value. The present invention provides a bolt axial force tightening device having a constant value.

これを図面により説明すると、第1図及び第2図は本発
明の動力レンチによるボルト軸力の一定値締付装置の一
例を示す回路図であって、第1図に於いて1は動力レン
チ、2は前記レンチの出力軸3は前記レンチの7駆動用
回転力制御電動機、4は前記電動機の負荷対誘導電流比
例制御装置、5は前記動力レンチに配備された手動式電
気開閉器、6は前記駆動用電動機に電力を供給する電源
、7は前記動力レンチ1と電源6とを結ぶ電線、26は
パルス検出器、27は前記検出器の回転軸、28は同じ
く多孔回転板、29は同じく投光器。
To explain this with the drawings, FIGS. 1 and 2 are circuit diagrams showing an example of a bolt axial force tightening device with a fixed value using a power wrench according to the present invention, and in FIG. 1, 1 is a power wrench. 2, the output shaft 3 of the wrench is a rotational force control electric motor for driving the wrench, 4 is a load-to-induced current proportional control device for the motor, 5 is a manual electric switch installed in the power wrench, 6 7 is a power source that supplies power to the drive motor; 7 is an electric wire connecting the power wrench 1 and the power source 6; 26 is a pulse detector; 27 is a rotating shaft of the detector; 28 is a porous rotating plate; Also a floodlight.

30は同じく受光器、31はパルス数を加算計量するカ
ウンター32は設定値との対比を行う比較器、19,3
3.34は電磁式電気開閉器、20と35は前記開閉器
の巻線、21は電力を測定する電力計、22は前記電力
計の電流用巻線、22は同じく電圧用巻線、24は同じ
く回転円板、25は同じく回転軸である。
30 is also a light receiver; 31 is a counter 32 that adds and measures the number of pulses; a comparator that compares it with a set value; 19, 3;
3.34 is an electromagnetic electric switch; 20 and 35 are windings of the switch; 21 is a wattmeter for measuring power; 22 is a current winding of the wattmeter; 22 is a voltage winding; Similarly, 25 is a rotating disk, and 25 is a rotating shaft.

次に上記第1図の動力レンチによるボルト軸力の一定値
締付装置の実施の態様を以下に説明する。
Next, an embodiment of the bolt axial force tightening device using a power wrench shown in FIG. 1 will be described below.

先ず締付けるべきボルト・セットを出力軸2に挿入して
動力レンチ1に配備された手動式電気開閉器5を作動し
、前記動力レンチの駆動用回転力制御電動機3に電源6
から電線7を通じて電力を供給して前記出力軸2を締付
方向に回転させる。
First, insert the bolt set to be tightened into the output shaft 2, operate the manual electric switch 5 provided on the power wrench 1, and connect the power source 6 to the rotational force control motor 3 for driving the power wrench.
Electric power is supplied from the motor through the electric wire 7 to rotate the output shaft 2 in the tightening direction.

此の時、動力レンチの出力軸2の締付変動負荷の増大傾
向による回転力制御電動機3の所要回転力の増大に応じ
て前記電動機内の電機子への誘導電流を上昇させるため
に電源6から電線7を通じて送り込まれる前記電動機内
の界磁巻線の通過所要電流を自動的に増加させ、さらに
此の界磁通過電流を前記の誘導電流に電力の磁界誘導変
換損失を伴なわせながら交換して電動機3の出力トルク
を増加させ動力レンチ出力軸2の締付負荷の増大に追従
させ、同時に前記電動機3の回転速度も前記電力の損失
に従って減少傾向に移行するから動力レンチ出力軸2の
回転速度もボルト・セットの締付変動負荷の増大傾向に
追従して減少する。
At this time, the power source 6 is activated in order to increase the induced current to the armature in the motor in accordance with the increase in the required rotational force of the rotational force control electric motor 3 due to the increasing tendency of the tightening fluctuating load on the output shaft 2 of the power wrench. automatically increases the current required to pass through the field winding in the motor, which is sent from the electric wire 7 through the electric wire 7, and further replaces this field passing current with the induced current while accompanied by a magnetic field induction conversion loss of electric power. The output torque of the electric motor 3 is increased to follow the increase in the tightening load on the power wrench output shaft 2, and at the same time, the rotational speed of the electric motor 3 also tends to decrease in accordance with the power loss. The rotational speed also decreases following the increasing trend of the tightening fluctuating load of the bolt set.

従って、この種の電動機では、出力トルクと回転速度と
の乗算値である動力値が、締付負荷トルクの変動に対し
て常に一定値に近似する特性を持つ。
Therefore, this type of electric motor has a characteristic that the power value, which is the multiplication value of the output torque and the rotational speed, always approximates a constant value despite fluctuations in the tightening load torque.

以上の説明は既に公知の直巻電動機の特性であり、この
直巻特性を有する電動機を本発明のボルト軸力の一定値
締付装置の駆動用回転力制御電動機3として用いる場合
においては、負荷対誘導電流比例制御装置4は不用とな
る。
The above description is the characteristics of a known series motor, and when a motor having this series winding characteristic is used as the rotational force control motor 3 for driving the bolt axial force constant value tightening device of the present invention, the load The induced current proportional control device 4 becomes unnecessary.

さらに此の種のボルト軸力の一定値締付装置では前記の
直巻特性を持たない電動機を用いた場合においても負荷
対誘導電流比例制御装置4によりすでに公知の方法1例
えば直列抵抗による界磁電流の変換、2次抵抗器による
誘導電流の変換、変圧器による電機子電圧及び界磁側端
子電圧の変換、極数変換、周波数変換、ブラシの位置変
換等の前記回転力制御電動機3の種類1例えば直流機、
交流誘導機、交流整流子機等に応じた各方法を用いて前
記電動機への負荷に対する電動機内の発生誘導電流との
関係を調節する事によりボルト・セット側の定数因子例
えばボルト軸径及びネジ山のす−ド量等に応じた動力レ
ンチの出力軸2の締付負荷トルクと回転速度との函数関
係を自由に選定する事が可能である。
Furthermore, in this type of bolt axial force tightening device with a constant value, even when using an electric motor that does not have the above-mentioned series winding characteristic, the load vs. induced current proportional control device 4 can be used in accordance with the already known method 1, for example, field magnetization using a series resistance. Types of the rotational force control motor 3 such as current conversion, induced current conversion using a secondary resistor, armature voltage and field side terminal voltage conversion using a transformer, pole number conversion, frequency conversion, brush position conversion, etc. 1 For example, a DC machine,
By adjusting the relationship between the induced current generated in the motor and the load on the motor using various methods depending on the AC induction machine, AC commutator machine, etc., constant factors on the bolt set side, such as bolt shaft diameter and screw It is possible to freely select the functional relationship between the tightening load torque of the output shaft 2 of the power wrench and the rotational speed according to the amount of thread of the mountain, etc.

又、前記の手動式電気開閉器5の作動により電磁式電気
開閉器19の巻線20にも電流が通るから動力レンチ1
と電源6とを結ぶ電線7の途中に置かれた前記の電磁式
電気開閉器19を介して電力計21の電流用巻線22と
電圧用巻線23に各谷電流及び電圧が附加され、前記の
各巻線22゜23と回転円板24との間に生ずる磁界に
より電流と電圧の積である直流電力又は電流と電圧の積
にさらに負荷の力率を乗じた交流電力を前記の回転円板
24と此れに固定された回転軸25の回転角速度に比例
変換する既に公知の電力計21を介して、前記電力計の
回転軸25と連結されたパルス検出器26の回転軸27
及び前記回転軸27に固定された多孔回転板28に前記
の既に公知の電力計21の回転角速度を伝播させ、さら
に前記検出器26の多孔回転板28の光導通孔(図示せ
ずにより投光器29からの連続発射光線を前記光導通孔
の通過毎に発する間歇光点(以後パルスと言う)として
受光器30に与える既に公知のパルス検出器26を分し
て、前記電力計21の回転角速度を前記検出器26によ
り単位時間当りのパルス数に比例変換して此のパルス信
号をカウンター31に電送する。
Furthermore, since current also passes through the winding 20 of the electromagnetic electric switch 19 due to the operation of the manual electric switch 5, the power wrench 1
Each valley current and voltage is applied to the current winding 22 and the voltage winding 23 of the wattmeter 21 through the electromagnetic electric switch 19 placed in the middle of the electric wire 7 connecting the power meter 21 and the power source 6, Due to the magnetic field generated between each of the windings 22 and 23 and the rotating disk 24, DC power, which is the product of current and voltage, or AC power, which is the product of current and voltage multiplied by the power factor of the load, is applied to the rotating disk 24. A rotary shaft 27 of a pulse detector 26 is connected to the rotary shaft 25 of the wattmeter through a known wattmeter 21 that proportionally converts the rotational angular velocity of the plate 24 and the rotary shaft 25 fixed thereto.
The rotational angular velocity of the already known power meter 21 is propagated to the porous rotary plate 28 fixed to the rotary shaft 27, and the light transmitting hole (not shown) of the porous rotary plate 28 of the detector 26 is transmitted to the light transmitting hole 29 (not shown). The rotational angular velocity of the wattmeter 21 is determined by dividing the already known pulse detector 26 which supplies a continuous emitted light beam to the light receiver 30 as an intermittent light spot (hereinafter referred to as a pulse) emitted every time it passes through the light guide hole. The detector 26 proportionally converts the pulse signal into the number of pulses per unit time and transmits this pulse signal to the counter 31.

前記のパルス信号は既に公知のカウンター31にてパル
スの数を順次加算計量され、前記の加算計量により締付
経過時間に対する動力レンチへの前記供給電力の相当量
である検出器26の多孔回転板28の刻々に変化する回
転角速度を任意締付経過時間を通して積算した集積回転
角変位量を動力レンチの所要集積電力量単位、ワット時
の相当量として、前記の電力計21とパルス検出器26
及びカウンター31より成る既に公知の計器類の組合せ
により構成された積算電力量計により前記電磁式電気開
閉器19の巻線20に電流が通じた時点より前記した如
く任意締付経過時間に於ける動力レンチへの供給電力量
(単位、ワット時)を積算計量する。
The above-mentioned pulse signal is already counted by adding up the number of pulses sequentially in a known counter 31, and the porous rotary plate of the detector 26, which is equivalent to the above-mentioned power supplied to the power wrench for the elapsed tightening time, is calculated by the above-mentioned addition and counting. The watt-hour meter 21 and the pulse detector 26 calculate the integrated rotational angular displacement amount obtained by integrating the ever-changing rotational angular velocity of 28 over the elapsed time of arbitrary tightening, as the unit of integrated power consumption of the power wrench, which is equivalent to watt hours.
From the time when current is passed through the winding 20 of the electromagnetic electric switch 19 by the integrating watthour meter constituted by a combination of already known instruments consisting of the counter 31 and the counter 31, the arbitrary tightening time elapsed as described above. Totally measures the amount of power supplied to the power wrench (in watt hours).

前記の計量値は微小時間毎に比較器32で予め計画され
た設定値と比較演算され、前記の設定値に前記の計量値
が等しくなった時点で電磁式電気開閉器33を作動して
動力レンチ1と電源6とを結ぶ電線7の途中に置かれた
別の電磁式電気開閉器34の巻線35に通じていた電流
を前記電磁式電気開閉器33により遮断し、動力レンチ
1に電線7と前記の電磁式電気開閉器34とを介して供
給されているボルト・セットの締付の為の駆動用電力を
動力レンチ1と電源6とを結ぶ電線7の途中にて遮断す
る。
The above-mentioned measured value is compared with a pre-planned set value by a comparator 32 at minute intervals, and when the above-mentioned measured value becomes equal to the set value, the electromagnetic electric switch 33 is operated to turn on the power. The electric current flowing through the winding 35 of another electromagnetic electric switch 34 placed in the middle of the electric wire 7 connecting the wrench 1 and the power source 6 is interrupted by the electromagnetic electric switch 33, and the electric wire is connected to the power wrench 1. The driving power for tightening the bolt set, which is supplied via the electromagnetic electric switch 7 and the electromagnetic electric switch 34, is cut off in the middle of the electric wire 7 connecting the power wrench 1 and the power source 6.

さらに、前記動力レンチの締め用手動式電気開閉器5を
締め始め前の平常状態に戻すと、電源6からの電気信号
が前記の手動式電気開閉器5及び電磁式電気開閉器34
を介して前記カウンター31に電送され、前記の積算回
路及び電気回路全体を復帰させて次のボルト・セットの
締付開始すなわち動力レンチ1に配備された前記の手動
式電気開閉器5の再作動に備える。
Further, when the manual electric switch 5 for tightening the power wrench is returned to the normal state before starting tightening, an electric signal from the power source 6 is transmitted to the manual electric switch 5 and the electromagnetic electric switch 34.
is transmitted to the counter 31 via the power wrench 1 to restore the integration circuit and the entire electric circuit to start tightening the next set of bolts, that is, to reactivate the manual electric switch 5 provided in the power wrench 1. Prepare for.

第2図は第1図に示す本発明のボルト軸力の一定値締付
装置に於いて、動力レンチ1の駆動用回転力制御電動機
3の回転始動時点から、ボルトセットの任意の負荷発生
時点迄の締付初期状態に於ける空廻り誤差を少なくする
為の前記駆動用回転力制御電動機3への供給電力量を集
積計量開始する時期を調節する装置を附加せるものであ
って。
FIG. 2 shows the bolt axial force constant value tightening device of the present invention shown in FIG. A device is added to adjust the timing at which integrated metering of the amount of power supplied to the drive rotational force control motor 3 is started in order to reduce the idle rotation error in the initial state of tightening.

第1図と同一符号は同一部分を示し、8は電流計、9は
前記電流計の巻線、10は同じく回転軸、11はパルス
検出器、12は前記検出器の回転軸。
The same reference numerals as in FIG. 1 indicate the same parts, 8 is an ammeter, 9 is a winding of the ammeter, 10 is a rotating shaft, 11 is a pulse detector, and 12 is a rotating shaft of the detector.

13は同じく多孔回転板、14は同じく投光器。13 is the same perforated rotary plate, and 14 is the same floodlight.

15は同じく受光器%16はパルス数を加算計量するカ
ウンター、17は設定値との対比を行う比較器、18は
電磁式電気開閉器であって、電源6からの電流を前記の
電動機3は供給する電線7の途中に電流計8を設け、前
記動力レンチの締め用手動式電気開閉器5の作動時に、
前記の電源6から供給される電流を前記電流計8の巻線
9に流し、前記巻線9と耐久磁石又は鉄片との間に磁界
を起して巻線又は鉄片を回転可動させ、電流を前記回転
可動部の回転力に比例変換させてさらに前記の回転力に
対抗するうす巻きスプリング(図示せず)の伸縮量すな
わち前記回転可動部の回転角変位置に比例変換させる既
に公知の電流計8の回転軸10とパルス検出器11の回
転軸12とを連結して、検出器11の多孔回転板13の
回転角変位量に前記電流計8の回転軸10の回転角変位
量を比例変換させ、さらに前記検出器11の多孔回転板
13の平面部の円軌道上に設けられた多数の光導通孔(
図示せず)により投光器14から発射される連続光線を
前記光導通孔の通過毎のパルスとして受光器15に与え
る既に公知のパルス検出器11を介して、前記電流計8
の回転角変位量を前記検出器11によりパルス数に比例
変換して此のパルス信号を既に公知のカウンター16に
電送する。
15 is a light receiver, 16 is a counter that adds and measures the number of pulses, 17 is a comparator that compares it with a set value, and 18 is an electromagnetic electric switch, which connects the current from the power source 6 to the electric motor 3. An ammeter 8 is provided in the middle of the electric wire 7 to be supplied, and when the manual electric switch 5 for tightening the power wrench is operated,
A current supplied from the power source 6 is passed through the winding 9 of the ammeter 8, a magnetic field is generated between the winding 9 and the durable magnet or the iron piece, the winding or the iron piece is rotated, and the current is generated. An already known ammeter that proportionally converts the rotational force of the rotary movable part and further proportionally converts the expansion and contraction amount of a thinly wound spring (not shown) that opposes the rotary force, that is, the rotational angular displacement position of the rotary movable part. The rotating shaft 10 of the ammeter 8 and the rotating shaft 12 of the pulse detector 11 are connected, and the rotational angular displacement of the rotating shaft 10 of the ammeter 8 is proportionally converted into the rotational angular displacement of the porous rotary plate 13 of the detector 11. Furthermore, a large number of light conducting holes (
The ammeter 8 is connected to the ammeter 8 via a known pulse detector 11 which applies a continuous light beam emitted from the light projector 14 to the light receiver 15 as a pulse each time it passes through the light guide hole.
The amount of rotational angular displacement is proportionally converted into a pulse number by the detector 11, and this pulse signal is electrically transmitted to a known counter 16.

前記のパルス信号はカウンター16にてパルスの数を動
力レンチの締付経過時間に対して順次加算計量され、前
記の電流計8とパルス検出器11及びカウンター16よ
り成る既に公知の計器の組合せにより構成された電流検
出器で検出された前記の計量値は微小時間毎に比較器1
7で予め設定された値と比較演算され、前記の設定値に
前記計量値が等しくなった時点で電磁式電気開閉器18
を作動して別の電磁式電気開閉器19の巻線20に電流
を通ずる。
The pulse signal is measured by a counter 16, which sequentially adds the number of pulses to the elapsed tightening time of the power wrench. The measured value detected by the configured current detector is sent to the comparator 1 every minute time.
7, the measured value is compared with a preset value, and when the measured value becomes equal to the set value, the electromagnetic electric switch 18
is actuated to pass current through the winding 20 of another electromagnetic electric switch 19.

すると、前記電磁式電気開閉器19の巻線20に電流が
通じた時点より、前記した第1図の場合と同様に任意締
付経過時間に於ける動力レンチへの供給電力量が集積計
量される。
Then, from the time when current is passed through the winding 20 of the electromagnetic electric switch 19, the amount of power supplied to the power wrench during the elapsed time of arbitrary tightening is integrated and measured, as in the case of FIG. 1 described above. Ru.

又、前記比較器17の予め設定された電流相当量の計画
設定値を調節する事により、前記の電磁式電気開閉器1
8.19の開閉時期をボルト・セット側の定数因子、例
えばボルト軸径及びボルトネジ山のリード量等に応じて
選定出来、前記供給電力量の集積計量開始時期を前記の
ボルト・セット側の定数因子に応じて自由に選定する事
が可能であるから、ボルト・セットの締付軸力の一定化
精度をより向上させることができる。
Further, by adjusting the planned setting value of the preset current equivalent amount of the comparator 17, the electromagnetic electric switch 1
The opening/closing timing of 8.19 can be selected according to the constant factors on the bolt set side, such as the bolt shaft diameter and the lead amount of the bolt thread, and the start time of integrated measurement of the amount of supplied power can be selected according to the constant factors on the bolt set side. Since it can be freely selected depending on the factors, it is possible to further improve the accuracy of constant tightening axial force of the bolt set.

さらに、前記動力レンチの締め用手動式電気開閉器5を
締め始め前の平常状態に戻すと、電気信号が前記カウン
ター16.31に電送され、電気回路全体を復帰させて
次のボルト・セットの締付開始に備える。
Further, when the manual electric tightening switch 5 of the power wrench is returned to the normal state before starting tightening, an electric signal is transmitted to the counter 16.31, restoring the entire electric circuit and starting the next set of bolts. Prepare to start tightening.

第1図及び第2図に示す動力レンチによるボルト軸力の
一定値締付装置の一例を示す回路図に於ては、予め締付
けられたボルト・セットを弛める場合に付いては図示し
ていない。
In the circuit diagrams showing an example of a device for tightening a bolt axial force to a constant value using a power wrench shown in Figs. 1 and 2, the case where a pre-tightened bolt set is loosened is not shown. .

以上の説明は動力レンチに供給する電気的な量を検出し
演算する方法として光電子的なパルス信号に変換し此れ
を加算計量する場合に付いて説明したが、本発明は此れ
に限定されるものではなく、その検出及び演算方法とし
て前記第1図及び第2図の電流計8又は、電力計21の
回転を機械的歯車機構を介して最小単位回転角度の倍数
として加算計量する計量装置を用いる場合に於ても其の
効果は同様である。
The above explanation has been made regarding the case where the amount of electricity supplied to the power wrench is detected and calculated by converting it into an optoelectronic pulse signal and adding and measuring the amount, but the present invention is not limited to this. The detection and calculation method is a measuring device that adds and measures the rotation of the ammeter 8 or wattmeter 21 shown in FIGS. 1 and 2 as a multiple of the minimum unit rotation angle via a mechanical gear mechanism. The effect is the same even when using .

又、前記第2図の計器類の組合せにより構成された電流
検出器の代りに電動モーターの入力側回路に変流器を設
け、電動モーターに供給される電流に比例した電圧を誘
起させ、この電圧の検出値が設定値に達した時点で前記
の電気開閉器18を作動させてもよい。
In addition, a current transformer is provided in the input side circuit of the electric motor in place of the current detector configured by the combination of instruments shown in FIG. 2, and a voltage proportional to the current supplied to the electric motor is induced. The electric switch 18 may be activated when the detected voltage value reaches a set value.

本発明は以上述べた如く、電動モーターにて駆動せられ
る動力レンチの出力軸の回転速度を締付負荷の増大傾向
に応じて自動的に追従低下させ、前記出力軸の動力値を
締付負荷トルクの変動に対して常に一定値に過似させ得
る締付装置によりボルト・セットを締付けて、ボルトの
軸方向締付力と動力レンチの締付経過時間に対する所要
集積エネルギーとが比例関係にあることと、動力レンチ
の駆動用電動モーターの集積電力量が前記の集積エネル
ギーの相当量である関係とを利用して、前記の締付所要
集積電力量を締付装置側で設定してこれを規制すること
及び前記所要電力の集積開始時期を電動モーターを通過
する電流計画値により設定することによるボルト軸力の
一定値締付装置であるから、多数からなるボルト・セッ
ト群の全数を各々のボルト・セットの回転摺動摩擦面の
固有の摩擦抵抗の差異と各々の締付位置における被締付
体の撓みによる弾性抵抗の差異さらにボルトの首下長さ
に関する歪量の違い等に対してその全数を一定の軸方向
締付力により締付ける事が可能である。
As described above, the present invention automatically lowers the rotational speed of the output shaft of a power wrench driven by an electric motor according to the increasing tendency of the tightening load, and adjusts the power value of the output shaft to the tightening load. The bolt set is tightened using a tightening device that can always maintain a constant value against fluctuations in torque, so that the axial tightening force of the bolt and the accumulated energy required for the elapsed tightening time of the power wrench are in a proportional relationship. By using this and the relationship that the integrated power amount of the electric motor for driving the power wrench is equivalent to the above-mentioned integrated energy, the above-mentioned integrated power amount required for tightening is set on the tightening device side. Since this is a device for tightening bolt axial force at a constant value by regulating the required power and setting the start time of the accumulation of the required power according to the planned value of the current passing through the electric motor, the total number of bolt sets consisting of a large number of bolts can be The difference in the inherent frictional resistance of the rotating and sliding friction surface of the bolt set, the difference in the elastic resistance due to the deflection of the tightened body at each tightening position, and the difference in the amount of strain related to the length under the bolt neck, etc. It is possible to tighten all the parts with a constant axial tightening force.

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

第1図及び第2図は本発明の動力レンチによるボルト軸
力の一定値締付装置の動作を示す回路図である。 1は動力レンチ、2はその出力軸、3はレンチ駆動用回
転力制御電動機、4は電動機の負荷対誘導電流比例制御
装置、6は電源、8は電流計、11.16はパルス検出
器、13.28は多孔回転板、14.29は投光器、1
5.30は受光器、16.31はパルス加算計量カウン
ター、1γ。 32は設定値との対比を行う比較器、18.19゜33
.34は電磁式電気開閉器、21は電力計、24は回転
板。
1 and 2 are circuit diagrams showing the operation of the device for tightening bolt axial force to a constant value using a power wrench according to the present invention. 1 is a power wrench, 2 is its output shaft, 3 is a rotational force control electric motor for driving the wrench, 4 is a proportional control device for electric motor load versus induced current, 6 is a power source, 8 is an ammeter, 11.16 is a pulse detector, 13.28 is a multi-hole rotating plate, 14.29 is a floodlight, 1
5.30 is a light receiver, 16.31 is a pulse addition weighing counter, and 1γ. 32 is a comparator for comparison with the set value, 18.19°33
.. 34 is an electromagnetic electric switch, 21 is a wattmeter, and 24 is a rotating plate.

Claims (1)

【特許請求の範囲】 1 動力レンチを駆動する電動モーターと、前記モータ
ーに電気を供給する電源と、動力レンチの出力軸の回転
速度とトルクとの関係をボルト・セットの定数因子に応
じて一定函数として計画し、前記出力軸の回転速度を締
付負荷の増大傾向に応じて順次自動的に追従低下させる
ことによって前記出力軸の動力値を締付負荷トルクの変
動に対して常に一定値に近似させ得る自動変速装置とを
備え、さらに電力計の回転可動部の回転角速度である単
位時間内の微小回転角通過度数を締付経過時間に渡って
積算した前記回転可動部の集積回転角変位量を所要集積
電力量(ワット時)とする積算電力量計と、前記動力レ
ンチの所要集積電力量が設定値に達したことを検知した
比較器から発信される信号にて作動する電気開閉器とを
前記電動モーターの入力側回路に設け、前記の所要集積
電力量が設定値に達した時点で動力レンチの駆動用電動
モーターに供給する電力を遮断することを特徴とする動
力レンチによるボルト軸力の一定値締付装置。 2 動力レンチの駆動用電動モーターに供給される電流
値を検出する電流検出器と、前記駆動用電動モーターの
所要電流値が設定値に達したことを検知した比較器から
発信される信号にて作動する電気開閉器とを前記電動モ
ーターの入力側回路に設け、前記の電流値が設定値に達
した時点から電動モーターへの供給電力の積算を開始さ
せる特許請求の範囲の第1項に記載した動力レンチによ
る2、ボルト軸力の一定値締付装置。
[Claims] 1. The relationship between an electric motor that drives a power wrench, a power source that supplies electricity to the motor, and the rotational speed and torque of the output shaft of the power wrench is constant according to a constant factor of a bolt set. The power value of the output shaft is always kept at a constant value against fluctuations in the tightening load torque by automatically following and decreasing the rotational speed of the output shaft sequentially according to the increasing tendency of the tightening load. an automatic transmission device capable of approximating the rotational angular velocity of the rotary movable part of the wattmeter, and further integrates the minute rotational angle passage frequency within a unit time, which is the rotational angular velocity of the rotary movable part of the wattmeter, over the elapsed tightening time. an electric switch that is activated by a signal transmitted from a comparator that detects that the required integrated power amount of the power wrench has reached a set value; is provided in the input side circuit of the electric motor, and when the required integrated power amount reaches a set value, the power supplied to the electric motor for driving the power wrench is cut off. Constant force tightening device. 2. A signal sent from a current detector that detects the current value supplied to the drive electric motor of the power wrench and a comparator that detects that the required current value of the drive electric motor has reached the set value. An electric switch that operates is provided in the input side circuit of the electric motor, and integration of power supplied to the electric motor is started from the time when the current value reaches a set value. 2. A fixed bolt axial force tightening device using a power wrench.
JP50075983A 1975-06-21 1975-06-21 It's hard to see what's going on in the world. Expired JPS5853991B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50075983A JPS5853991B2 (en) 1975-06-21 1975-06-21 It's hard to see what's going on in the world.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50075983A JPS5853991B2 (en) 1975-06-21 1975-06-21 It's hard to see what's going on in the world.

Publications (2)

Publication Number Publication Date
JPS51151900A JPS51151900A (en) 1976-12-27
JPS5853991B2 true JPS5853991B2 (en) 1983-12-02

Family

ID=13591996

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50075983A Expired JPS5853991B2 (en) 1975-06-21 1975-06-21 It's hard to see what's going on in the world.

Country Status (1)

Country Link
JP (1) JPS5853991B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4989998A (en) * 1972-12-29 1974-08-28
JPS5016599A (en) * 1973-05-03 1975-02-21
JPS5036855A (en) * 1973-08-03 1975-04-07

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4989998A (en) * 1972-12-29 1974-08-28
JPS5016599A (en) * 1973-05-03 1975-02-21
JPS5036855A (en) * 1973-08-03 1975-04-07

Also Published As

Publication number Publication date
JPS51151900A (en) 1976-12-27

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