CN86100183A - The control method of root pass and equipment thereof in the one-sided welding - Google Patents
The control method of root pass and equipment thereof in the one-sided welding Download PDFInfo
- Publication number
- CN86100183A CN86100183A CN86100183.4A CN86100183A CN86100183A CN 86100183 A CN86100183 A CN 86100183A CN 86100183 A CN86100183 A CN 86100183A CN 86100183 A CN86100183 A CN 86100183A
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- CN
- China
- Prior art keywords
- signal
- welding
- mother metal
- metallic plate
- voltage
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- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
Abstract
The root pass control method and the equipment of one-sided welding.No matter how groove situation (such as groove shape and root space etc.) changes, and this method and equipment always can provide a fabulous root pass shape.
(described back-metal plate compresses by the back side of a kind of inorganic material with mother metal by detecting the voltage that produced between mother metal and the back-metal plate or electric current, described electric current and voltage have a good relationship with root pass is wide), and according to the control of detected value such as welding parameters such as welding current or arc voltages, thereby uniform root pass shape is provided.
Description
The present invention relates to the control method of the root pass of one-sided welding, no matter what state such as bevel angle changes, and this method can guarantee that all the shape of root pass is good, the invention still further relates to the used equipment of this method of finishing.
The automatic single side welding is a kind of like this welding method: in the butt seam welding process of mother metal, connect mother metal from its surperficial face down bonding, need not to overturn just can obtain enough weld penetrations, and this welding is effectively and economy.Therefore, this law is widely used in such as the backing plate welding of shipbuilding with heavy steel plate such as steel.
In the automatic single side welding, the groove situation of mother metal, that is, the groove shape, situations such as root run must provide good fusion penetration all the time.Yet it is a defective that each end face of mother metal is tending towards inhomogeneous, and this is because (for example) produces thermal deformation and make the groove situation during cutting is not always to remain unchanged, so that causes the inhomogeneities of root pass after welding.
Main purpose of the present invention is for the root pass of controlling in the one-sided welding provides a kind of method and apparatus, thereby overcomes the defective in the above-mentioned traditional automatic single side welding: even under the non-constant situation of groove state, it is even also to reach penetration bead.
For achieving the above object, according to the method for the root pass in the control one side weld termination process provided by the present invention, guaranteed that penetration bead is even, this method comprises the following steps:
(a) on a metallic plate, settle a kind of inorganic material.
(b), this inorganic material is in the tight contact condition in the mother metal back side by means of this metallic plate.
(c) signal generator is connected on this mother metal and the metallic plate, the signal of telecommunication that this generator produced and the frequency of welding machine electric power, electric current is different with voltage characteristic.
(d) will be added to from the signal of telecommunication of above-mentioned signal generator on mother metal and the metallic plate, to finish one-sided welding.
(e) at one-sided weld period, detect between mother metal and the metallic plate by voltage that the signal of telecommunication produced or/and electric current, obtaining at weld period, electric arc point is gone up and electric arc point electrical impedance on every side.
(f) constant for keeping electrical impedance, control such as welding current arc voltage, welding parameters such as speed of welding or conductor length.
Also have,, comprise a welding machine electric power, a signal generator as the control appliance of one-sided welding root pass according to the present invention, a signal detector, the logical Lu of a band ripple device, a converter, a Lu ripple device, reference signal setting device, a comparator and an integrating circuit.
Signal generator is linked on mother metal and the metallic plate, and this metallic plate closely contacts with the mother metal back side by an inorganic material, and one is connected across on mother metal and the metallic plate at the signal of telecommunication that is different from welder power aspect frequency, electric current and the voltage characteristic.
Bandpass filter only allows by coming the detection signal of the required frequency of automatic signal generator.
Converter will be transformed into direct current (dc) signal by interchange (ac) signal of bandpass filter.Wave filter is then removed the noise signal that is included in the dc signal that converter produces.
The reference signal setting device is set up a predetermined standard signal according to required penetration bead.
Comparator is compared the dc signal that wave filter produced with the standard signal that the reference signal setting device is produced, and produces " poor " signal of comparative result.
Integrating circuit advances to draw integration to the difference signal that comparator produced, and its output signal is added to welding machine electric power.
Welding machine electric power is controlled welding parameter in such a way, so that the output signal of integrating circuit is reduced to zero, and makes the penetration bead of one-sided weld period become even.
As the method and apparatus that a kind of situation of the present invention provided, the oscillator of 200HE frequency that has adopted constant-current characteristics is as signal generator, at weld period, detect the alternating voltage between mother metal and the metallic plate, and it is transformed to dc voltage, then this dc voltage is compared with normal voltage, control penetration bead thus, make it become even.
According to the present invention, utilized such fact: at weld period, penetration bead and be connected across mother metal and the signal voltage at metallic plate two ends or electric current between have a kind of fabulous relation, add to and cause on mother metal and the metallic plate and this curtage is the signal of telecommunication of origin automatic signal generator, welding parameter is controlled in such a way, so that the signal voltage or the electric current that are connected across on mother metal and the metallic plate are kept constant, and the pipe bevel what state does not change, all make the width unanimity of root pass, guarantee the shape unanimity of root pass thus.In addition, can be easy to guarantee uniform penetration bead, therefore can improve the welding operation efficient of heavy steel plate greatly by (computer) on-line operation.
Above-mentioned and other purpose of the present invention, feature and advantage, will from the explanation of being done below in conjunction with the reference accompanying drawing solve clearer.
Now as follows to Brief Description Of Drawings:
Fig. 1 is the schematic diagram of one embodiment of the invention, and in order to a kind of principle that adopts the one side weld connection of submerged-arc welding to be described, this method adopts two electrodes and once by finishing welding;
Fig. 2 is a performance diagram, with the relation of the detection voltage on demonstration mother metal and the back copper coin with penetration bead;
Fig. 3 is the calcspar of expression according to root pass control appliance of the present invention.
Now details are as follows to preferred example of the present invention:
Referring to Fig. 1, label 1 expression mother metal, the welding flux backing that label 2 expressions are made up of a kind of inorganic material also presses contact by back copper coin 3 with the back side of mother metal 1.4A and 4B are electrode, and 5A and 5B are welding machine electric power, and its each frequency is 50 or 60C/S.Label 12 is a signal generator.Signal generator 12 comprises an oscillator with sad properties of flow, and its frequency is that 200C/S-is different with welding machine electric power 5A and 5B.Voltage detector of label 6 expressions is in order to detect the voltage between mother metal 1 and the copper soleplate 3.
With regard to illustrated one side weld connection, in the start cycle of welding, do not form root pass, impedance between mother metal 1 and the back copper coin 3 is high, even to show on mother metal 1 and back copper coin 3, having applied the signal of telecommunication that comes automatic signal generator 12, in fact also spacing current flows through, thus record frequency oscillator floating voltage and as signal voltage.
After the welding beginning, when forming gratifying root pass, then flow through signal code from frequency oscillator.This be because: form the place of good root pass, every mother metal 1 produces the place that forms keyhole under the point at electric arc just, causes electric arc to arrive back copper coin 3 and make thus between mother metal 1 and the back copper coin 3 by each keyhole and is conduction state.The Another reason heat that to be welding flux backing 2 produce owing to welding process is heated, and makes its part form molten slag, thereby has reduced resistance value.
The present invention obtains characteristic shown in Figure 2 owing to insert signal generator 12, and this signal generator 12 comprises that a frequency is 200C/S and has frequency oscillator to mother metal 1 and copper soleplate 3 sad properties of flow.This frequency oscillator is also checked the mother metal 1 that formed the root pass place and the conduction state between the back copper coin 3 relation with penetration bead.Transverse axis is represented penetration bead (mm) in the characteristic curve of Fig. 2, and the measured detection voltage V(volt of longitudinal axis representative voltage detector 6).
Longitudinal axis representative detects voltage V among Fig. 2, if I represents electric current, then the impedance Z under the conduction state is expressed as follows:
Z＝V/I
In the present embodiment, signal generator 12 comprises the frequency oscillator of a sad properties of flow, so that electric current I is a constant, and keep Z=K.V or V=K.Z(wherein K and K ' be constant therefore, when adding that this is sad when deciding electric current, detect the direct ratio of voltage V in impedance Z, like this, detect voltage and represent impedance Z.
As by Fig. 2 finding, between detection voltage V on mother metal 1 and the back copper coin 3 and penetration bead, exist fabulous relation.
Therefore, making detection voltage V or impedance Z keep constant by the control welding parameter, is possible to obtain given penetration bead.
Fig. 3 is that expression is used to control welding parameter so that keep the calcspar that detects the constant example of control appliance of voltage V as previously mentioned.As shown in Figure 3, by measured mother metal 1 of voltage detector 6 and the detection voltage V between the back copper coin 3, by a bandpass filter 13, and this wave filter only allows the output of frequency oscillator pass through, therefore, the 200C/Sac signal is added to converter 7 and is transformed to the dc signal successively.The voltage signal that is produced by converter 7 passes through wave filter 8, so that be added to comparator 9 again after removing noise.The same normal voltage signal of voltage signal that is added to comparator 9 is compared, this normal voltage signal is a corresponding given penetration bead and setting in advance in reference voltage setting device 10, and given root pass wide based on root pass wide with cross-over connection in the relation of mother metal 1 and back copper coin 3 voltage between the two.Comparator 9 is striden 11 by the integration electricity and is provided the signal of the difference of two voltage signals to welding machine electric power.Welding machine electric power 5A controls welding current in such a way, so that this difference signal reduces to zero.In other words, the control welding current is so that the voltage signal between mother metal 1 and the back copper coin 3 always equals normal voltage signal 10.
Because like this control is so that the voltage V that is produced between mother metal 1 and back copper coin 3 by the signal of telecommunication of signal generator 12 always keeps constant, thereby, it is possible finishing the one-sided welding of root pass that has with the corresponding given width of voltage V, thereby also can be easy to control the width of root pass.
Though in the present embodiment, signal generator 12 comprises that a constant-current characteristics, frequency are the oscillator of 200C/S, also can adopt also dc signal of any expected frequency that is different from the welding machine electric power frequency, this signal.Certainly, if an impedance is provided between mother metal 1 and back copper coin 3, then signal generator just needn't have sad properties of flow.
In addition, although be the welding current of control electrode 4A in the present embodiment, need not explanation, any other welding parameter except that welding current as long as it can effectively form root pass, all may be utilized, for example: arc voltage, speed of welding, the arbitrary parameter in conductor size or the like or their arbitrary combination all can be used to control the width of root pass.
Also have, the present invention is except being suitable for submerged-arc welding (i.e. the arc welding that gas shield is arranged of application-consutrode), also applicable to any other welding method.
Claims (3)
1, is used to weld the root pass control method of the one-sided welding of two mother metals: from its side, by be configured in one on the metallic plate inorganic material and by described inorganic material described metallic plate is connected to the back of described mother metal, this method is characterised in that and comprises the following steps:
(a) signal generator that is used to produce the signal of telecommunication is linked described mother metal and described metallic plate, this generator is different with welding machine electric power aspect each characteristic of frequency, electric current and voltage;
(b) signal of telecommunication with described signal generator is added on described mother metal and the described metallic plate, to realize the one-sided welding of described mother metal;
(c), or/and electric current, produce to obtain in this welding process electric arc that point is gone up and electric arc produces some resistance value on every side by the voltage that is produced between described mother metal of described electrical signal detection and the described metallic plate at described one-sided weld period; With
(d) control such as welding current, arc voltage, speed of welding conductor size etc. connects parameter, and is constant to keep described impedance.
2, weld the used equipment of root pass control method of the one-sided welding of two mother metals from the mother metal side, this method is settled a kind of inorganic material on a metallic plate, and the back that described metallic plate is linked described mother metal by described inorganic material, described apparatus characteristic is to comprise:
Signal generator-link described mother metal and described metallic plate is added to a signal of telecommunication on described mother metal and the described metallic plate, and this signal of telecommunication is in frequency, and electric current and voltage characteristic aspect are different from the source of welding current;
Signal detector-link described mother metal and described metallic plate, so that detect voltage and/or electric current, this voltage and current is at weld period, is produced between described mother metal and described metallic plate by the signal of telecommunication from described signal generator;
Bandpass filter-be used for only card by detection signal by the preset frequency that described signal detector measured;
Converter-be used for the AC signal by described bandpass filter is transformed to direct current signal;
Wave filter-be used for removing noise of the direct current signal that produces from described converter;
Reference signal setting device-be used for according to required penetration bead is set predetermined standard signal;
The direct current signal of comparator-be used for described wave filter is produced is compared with the standard signal that is produced by described reference signal setting device, to produce " poor " signal;
Integrating circuit-be used for the difference signal from described comparator is carried out integration; With
Described welding machine electric power-be used to receive output signal from described integrating circuit, with control such as welding parameters such as welding current, arc voltage, speed of welding or wiring length, thereby the output of described integrating circuit is decreased to zero.
3,, be characterised in that the described source of welding current comprises a power supply with 50c/s or 60c/s frequency, and wherein said signal generator comprises that a frequency is 200c/s and the oscillator that sad properties of flow is arranged according to the root pass control appliance of right important item 2.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60019199A JPS61180677A (en) | 1985-02-05 | 1985-02-05 | Back bead control method in one side welding |
| JP19199/85 | 1985-02-05 | ||
| JP60-19199 | 1985-02-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86100183A true CN86100183A (en) | 1986-08-06 |
| CN1004475B CN1004475B (en) | 1989-06-14 |
Family
ID=11992681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86100183.4A Expired CN1004475B (en) | 1985-02-05 | 1986-01-09 | Method and apparatus for controlling a penetratim bead in one-side welding |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS61180677A (en) |
| KR (1) | KR920008492B1 (en) |
| CN (1) | CN1004475B (en) |
| GB (1) | GB2170437B (en) |
| SG (1) | SG4289G (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118655A (en) * | 2021-03-17 | 2021-07-16 | 南京东斯达机电科技有限公司 | Welding method and device for single-side V-shaped groove weldment with uneven groove gap |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2734306B2 (en) * | 1992-07-15 | 1998-03-30 | 日本鋼管株式会社 | One-side automatic Uranami welding method |
| CA2458165A1 (en) * | 2001-08-21 | 2003-03-06 | Serimer Dasa | Process for welding arc control by determining the instantaneous current and voltage |
| CN100389169C (en) * | 2005-07-15 | 2008-05-21 | 中国石油化工股份有限公司 | Production of high-bioctyl-value diesel oil by coal liquification |
-
1985
- 1985-02-05 JP JP60019199A patent/JPS61180677A/en active Pending
-
1986
- 1986-01-07 GB GB08600297A patent/GB2170437B/en not_active Expired
- 1986-01-09 CN CN86100183.4A patent/CN1004475B/en not_active Expired
- 1986-01-31 KR KR1019860000661A patent/KR920008492B1/en not_active IP Right Cessation
-
1989
- 1989-01-26 SG SG42/89A patent/SG4289G/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118655A (en) * | 2021-03-17 | 2021-07-16 | 南京东斯达机电科技有限公司 | Welding method and device for single-side V-shaped groove weldment with uneven groove gap |
Also Published As
| Publication number | Publication date |
|---|---|
| SG4289G (en) | 1989-05-26 |
| GB2170437A (en) | 1986-08-06 |
| CN1004475B (en) | 1989-06-14 |
| KR860006310A (en) | 1986-09-09 |
| GB2170437B (en) | 1988-11-02 |
| GB8600297D0 (en) | 1986-02-12 |
| JPS61180677A (en) | 1986-08-13 |
| KR920008492B1 (en) | 1992-09-30 |
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