JPH0424153B2 - - Google Patents
Info
- Publication number
- JPH0424153B2 JPH0424153B2 JP56017659A JP1765981A JPH0424153B2 JP H0424153 B2 JPH0424153 B2 JP H0424153B2 JP 56017659 A JP56017659 A JP 56017659A JP 1765981 A JP1765981 A JP 1765981A JP H0424153 B2 JPH0424153 B2 JP H0424153B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- making machine
- welding
- pipe
- low
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Velocity Or Acceleration (AREA)
Description
【発明の詳細な説明】
本発明は、電縫鋼管製造時における造管機の特
に造管初期時における速度制御法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of controlling the speed of a pipe-making machine during the production of electric resistance welded steel pipes, particularly at the initial stage of pipe-making.
従来の造管機の運転の方法によれば、先ず造管
機の起動し、目的とする定常の造管速度に達した
後、溶接を開始せしめ、その速度に見合つた適正
入熱を設定して溶接し、次いでその溶接の際管の
外表面に突出形成された溶接ビードを所定の刃物
により、切削して、製品としている。 According to the conventional method of operating a pipe-making machine, the machine is first started, and after reaching the target steady-state pipe-making speed, welding is started and an appropriate heat input is set to match that speed. Then, the weld bead formed protrudingly on the outer surface of the tube during welding is cut with a predetermined knife to produce a product.
ところで、上述した従来の電縫造管機にあつて
は、その造管機の稼働初期時において、造管機の
始動速度と、溶接温度との関係が適正でないため
に、造管初期時における数メートルから数十メー
トルに及ぶ間が溶接不良部となり、製品歩留まり
が低下するといつた問題点があつた。 By the way, in the case of the above-mentioned conventional electric resistance welding pipe making machine, the relationship between the starting speed of the pipe making machine and the welding temperature is not appropriate at the initial stage of operation of the pipe making machine. There was a problem in that the welding defects occurred in areas ranging from several meters to several tens of meters, resulting in a decrease in product yield.
つまり電縫造管機において、その造管初期時
に、造管機速度を高速化すれば適正な溶接温度と
なる前に鋼管が進行されて溶接が不可能であり、
また造管機速度を低速化すれば適正温度とするこ
とは可能であつても生産性が低下し、さらに熱エ
ネルギーの無駄が発生するという問題点があつ
た。 In other words, if the speed of the ERW pipe making machine is increased at the initial stage of pipe production, the steel pipe will progress before the appropriate welding temperature is reached, making welding impossible.
Furthermore, if the speed of the pipe-making machine is lowered, even if it is possible to obtain a suitable temperature, there is a problem in that productivity decreases and furthermore, thermal energy is wasted.
又、それに加え、定常速度にて稼働中の造管機
の速度変更を行なう場合、従来は、オペレーター
が手動にて速度変更を行い、その速度に見合つた
適正入熱を設定していたため、速度の変化率が一
定とならず、その為に生ずる入熱不足又は入熱過
多を生じ、電縫鋼管の溶接品質に悪影響を及ぼし
ていた。 In addition, when changing the speed of a pipe-making machine operating at a steady speed, conventionally the operator manually changed the speed and set the appropriate heat input to match the speed. The rate of change is not constant, resulting in insufficient or excessive heat input, which adversely affects the welding quality of ERW steel pipes.
本発明は、このような背景から造管機の低速始
動速度と、この低速始動速度から高速定常速度ま
での速度制御と、溶接温度の定温制御を有効かつ
自動的に行ない、従来の問題点を解消することの
できる電縫造管機の速度制御法を提供することに
ある。 Against this background, the present invention effectively and automatically controls the low starting speed of a pipe making machine, the speed control from this low starting speed to a high steady speed, and the constant temperature control of the welding temperature, thereby solving the conventional problems. It is an object of the present invention to provide a speed control method for an electric resistance welding pipe making machine that can solve the problems.
以下に本発明の実施例を図面に基いて詳細に説
明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
先ず第３図に示す電縫造管機の速度制御回路に
ついて述べると、１は高速設定可変低抗器、２は
低速設定可変抵抗器、ａ及びｂは低速時間設定タ
イマ１０によつて動作される高低速切替えスイツ
チである。３は増幅器、４は高速立上り時間設定
用の可変抵抗器、５は低速立上り時間設定用の可
変低抗器で、これら可変抵抗器４及び５にはスイ
ツチｃ，ｄが接続されている。６はパルスモー
タ、７は変速ギヤ群、８は速度設定器、９はフイ
ードバツク用可変抵抗器である。 First, the speed control circuit of the electric resistance welding pipe making machine shown in FIG. This is a high/low speed changeover switch. 3 is an amplifier, 4 is a variable resistor for setting a fast rise time, and 5 is a variable resistor for setting a slow rise time. Switches c and d are connected to these variable resistors 4 and 5. 6 is a pulse motor, 7 is a variable speed gear group, 8 is a speed setting device, and 9 is a variable resistor for feedback.
次に速度制御方法について述べると、第１図の
速度−時間特性図に示す通り、従来は鎖線Ａのよ
うに造管機を起動し、定常の速度（図によると
100ｍ／分）に達してから溶接を開始し、上記に
述べる手順に従い製品化していたが、本発明によ
ればこの操作を実線Ｂで示す如く低速始動速度に
次いで加速運転となし、次いで高速定常速度とな
す３段階運転を自動的に行なつて製品歩留まりを
高めさらには品質の良い電縫鋼管を生産すること
にある。 Next, regarding the speed control method, as shown in the speed-time characteristic diagram in Figure 1, in the past, the pipe making machine was started up as shown by the chain line A, and the speed was maintained at a steady speed (according to the figure).
100 m/min), welding was started and the product was manufactured according to the procedure described above, but according to the present invention, this operation is performed as shown by solid line B, with a low starting speed, followed by an accelerated operation, and then a high-speed steady-state operation. The objective is to automatically perform three-stage operation at different speeds, increase product yield, and produce high-quality ERW steel pipes.
次に本実施例における動作手順について説明す
ると、先ず第２図の特性図における低速始動速度
をVL、高速定常速度をVH、低速始動速度VLまで
の立上り時間をt1、低速始動速度運転時間をt2、
低速始動速度VLから高速定常速度までの立上り
時間t3、及び低速始動速度VLに立ち上つた直後に
行なわれる例えば溶接機のスタートスイツチある
いは溶接温度を一定に保たせるための温度制御装
置のスタートスイツチ等のスイツチ操作に費やさ
れる準備作業時間をt4とし、図１に示す如く、本
実施例では、
VL＝20ｍ／分
VH＝100ｍ／分
t1＝１秒
t2＝30秒
t3＝30秒
t4＝４秒
に設定する。 Next, to explain the operating procedure in this embodiment, first , in the characteristic diagram of FIG. The driving time is t 2 ,
The rise time t 3 from low-speed starting speed V L to high-speed steady speed, and the start switch of a welding machine immediately after rising to low-speed starting speed V L or the temperature control device for keeping the welding temperature constant. The preparatory time spent on operating switches such as the start switch is t4 , and as shown in Figure 1, in this example, V L = 20 m/min V H = 100 m/min t 1 = 1 second t 2 = 30 seconds Set t 3 = 30 seconds and t 4 = 4 seconds.
かかる準備が完了した後、造管機始動スイツチ
を押すと、パルスモータ６が駆動し、造管機が速
度設定器８、ギヤ群７を介して駆動され約１秒間
で低速始動速度VL（20ｍ／分）に到達する。 After these preparations are completed, when the pipe-making machine start switch is pressed, the pulse motor 6 is driven, and the pipe-making machine is driven via the speed setting device 8 and gear group 7, and the low starting speed V L ( 20m/min).
低速始動速度（20ｍ／分）に達してから約４秒
間の準備作業時間t4が経過すると溶接が自動的に
開始され、低速始動速度（VL）に到達後時間t2
（30秒）が経過すると上記速度制御回路からの信
号によりパルスモータ６の回転が増速し、これに
よつて、加速度走行となるが、この加速度運転
は、約３ｍ／sec2で時間（t3）＝約30秒間続けら
れる。 Welding is automatically started when a preparatory time t 4 of approximately 4 seconds has elapsed after reaching the low starting speed (20 m/min), and time t 2 after reaching the low starting speed (V L ).
(30 seconds), the rotation speed of the pulse motor 6 is increased by the signal from the speed control circuit, which results in accelerated driving. 3 ) = Can be continued for about 30 seconds.
この加速度運転が約30秒続けた後は上記速度制
御回路からの制御信号により高速定常速度（100
ｍ／分）となり、その高速定常運転で溶接作業が
継続されるものである。 After this acceleration operation continues for about 30 seconds, the high speed steady speed (100
m/min), and the welding work is continued at this high-speed steady operation.
造管機停止用スイツチを押すと、瞬間に造管機
は停止し、その後、パルスモーター６が逆転し、
スタート位置にすみやかに復帰されるものであ
る。 When the pipe-making machine stop switch is pressed, the pipe-making machine stops instantly, and then the pulse motor 6 reverses.
It allows you to quickly return to the starting position.
以上が本実施例の作用であるが、次に本実施例
の効果を明らかとするため、従来例と比較して説
明する。 The above is the effect of this embodiment.Next, in order to clarify the effect of this embodiment, a comparison with a conventional example will be explained.
つまり第１図に示すように、定常速度を100
ｍ／分で行なう場合、従来例では立上り時間が約
10秒で定常速度（100ｍ／分）に入るまでの製品
不良部の長さを算出すると次の如くとなる。すな
わち、造管機の速度が、定常速度（100ｍ／分）
になる立上り時間が10秒間とすると、この立上り
時間までの製品不良部長さは8.3ｍとなる。さら
に定常速度（100ｍ／分）に立上つた後に行なわ
れる例えば溶接機等のスタートスイツチ操作に費
やされる作業時間を約４秒とすると、この間に走
行長さが約6.7ｍとなり総計で約15ｍの不良部長
さが生じる。 In other words, as shown in Figure 1, the steady speed is 100
m/min, the conventional example has a rise time of approx.
The length of the defective part of the product until it reaches steady speed (100 m/min) in 10 seconds is calculated as follows. In other words, the speed of the pipe making machine is steady speed (100 m/min)
If the rise time is 10 seconds, the length of the defective product section up to this rise time will be 8.3 m. Furthermore, if we assume that the work time required to operate the start switch of a welding machine, etc., after reaching a steady speed (100 m/min) is about 4 seconds, the running length during this time will be about 6.7 m, for a total of about 15 m. Defective parts occur.
これに対し、本願実施例では、造管機の速度が
始動速度（20ｍ／分）になる立上り時間が１秒間
とすると、この立上り時間までの製品不良部長さ
は0.3ｍとなる。さらに定常速度（20ｍ／分）に
立上つた後に行なわれる例えば溶接機等のスター
トスイツチ操作に費やされる作業時間を約４秒と
すると、この間の走行長さが約1.2ｍとなり、総
計で約1.5ｍとなる。 On the other hand, in the embodiment of the present application, if the rise time when the speed of the pipe making machine reaches the starting speed (20 m/min) is 1 second, the length of the defective part of the product up to this rise time is 0.3 m. Furthermore, if we assume that the work time required to operate the start switch of a welding machine, etc., after reaching a steady speed (20 m/min) is about 4 seconds, the running length during this time will be about 1.2 m, for a total of about 1.5 m/min. m.
従つて、従来例に比較すると、本実施例では、
その不良部が１／10に減少することが判然とす
る。 Therefore, compared to the conventional example, in this example,
It is clear that the number of defective parts is reduced to 1/10.
以上のように本発明によれば、電縫造管機によ
る生産上、必然的に生ずる不良部の長さを著しく
減少せしめることができ、さらには自動制御が可
能であることから従来のようにオペレーターへの
依存度が無くなり、無人化造管となるため、良品
の生産が高められるという効果がある。 As described above, according to the present invention, it is possible to significantly reduce the length of defective parts that inevitably occur during production using an electric resistance welding pipe making machine, and furthermore, because automatic control is possible, This eliminates dependence on operators and results in unmanned pipe manufacturing, which has the effect of increasing the production of quality products.
第１図は従来例及び本実施例の速度−時間特性
の比較図、第２図は本実施例の速度−時間特性の
基本図、第３図は本実施例の装置の構成回路図で
ある。
１…高速設定可変抵抗器、２…低速設定可変抵
抗器、３…OP Amp（増幅器）、４…高速立上り
時間設定VR、５…低速立上り時間設定VR、６
…パルスモーター、７…ギヤ、８…速度設定器、
９…フイードバツク用可変抵抗器、１０…低速時
間設定タイマー。
Fig. 1 is a comparison diagram of the speed-time characteristics of the conventional example and the present embodiment, Fig. 2 is a basic diagram of the speed-time characteristic of the present embodiment, and Fig. 3 is a configuration circuit diagram of the device of the present embodiment. . 1...High speed setting variable resistor, 2...Low speed setting variable resistor, 3...OP Amp (amplifier), 4...High speed rise time setting VR, 5...Slow rise time setting VR, 6
...pulse motor, 7...gear, 8...speed setting device,
9... Variable resistor for feedback, 10... Low speed time setting timer.
Claims (1)
縫鋼管の製造において、電縫造管機の低速始動速
度を約20ｍ／分の低速とし、所定の溶接温度自動
制御のもとに、上記低速から高速定常速度に至る
間の加速度が、約３ｍ／sec2以下となるように、
電縫造管機の速度を自動制御することを特徴とす
る電縫造管機の速度制御法。1 In the production of ERW steel pipes by high frequency low resistance welding and high frequency induction welding, the low starting speed of the ERW pipe making machine is set to a low speed of approximately 20 m/min, and the welding temperature is automatically controlled from the above low speed to high speed. So that the acceleration until reaching steady speed is approximately 3 m/sec 2 or less,
A speed control method for an ERW pipe making machine, characterized by automatically controlling the speed of the ERW pipe making machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1765981A JPS57132210A (en) | 1981-02-09 | 1981-02-09 | Speed control method for electric welded tube welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1765981A JPS57132210A (en) | 1981-02-09 | 1981-02-09 | Speed control method for electric welded tube welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57132210A JPS57132210A (en) | 1982-08-16 |
| JPH0424153B2 true JPH0424153B2 (en) | 1992-04-24 |
Family
ID=11949967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1765981A Granted JPS57132210A (en) | 1981-02-09 | 1981-02-09 | Speed control method for electric welded tube welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57132210A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6038682U (en) * | 1983-08-25 | 1985-03-18 | 株式会社明電舎 | Control device for thin-walled ERW pipe making machine |
| JPH039904Y2 (en) * | 1984-10-22 | 1991-03-12 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1470959A (en) * | 1973-06-04 | 1977-04-21 | Triplex Safety Glass Co | Manufacture of laminated glass articles |
| JPS5525955A (en) * | 1978-08-14 | 1980-02-25 | Omron Tateisi Electronics Co | Leakage breaker |
| JPS565637A (en) * | 1979-06-28 | 1981-01-21 | Tokyo Optical | Operation distance detector in ophthalmology machine |
-
1981
- 1981-02-09 JP JP1765981A patent/JPS57132210A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57132210A (en) | 1982-08-16 |
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