CN101610869A - The manufacture method of electric-resistance-welded steel pipe and manufacturing installation thereof - Google Patents
The manufacture method of electric-resistance-welded steel pipe and manufacturing installation thereof Download PDFInfo
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- CN101610869A CN101610869A CNA2008800049167A CN200880004916A CN101610869A CN 101610869 A CN101610869 A CN 101610869A CN A2008800049167 A CNA2008800049167 A CN A2008800049167A CN 200880004916 A CN200880004916 A CN 200880004916A CN 101610869 A CN101610869 A CN 101610869A
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Abstract
The invention provides the manufacture method of the good electric-resistance-welded steel pipe of a kind of toughness of weld part,, also can stably produce electric-resistance-welded steel pipe with desirable toughness of welded zone even dimensional variations etc. is arranged as the band steel of mother metal.By edge (4a, 4b) the groove shape (5a, 5b) of giving opening steel pipe (4), and before carrying out resistance welded, utilize monitor (11) that edge (4a, 4b) taken continuously, carry out image after being input to this photographic images in the arithmetic processing apparatus (14) and handle instrumentation groove depth h, according to this instrumentation bonding power of calculating optimum as a result, adjust bonding power from bonding power generation device (6).And after resistance welded, utilize supersonic crack detector (15) continuously the oxide of this weld part of instrumentation distribute, according to the described instrumentation bonding power of calculating optimum as a result, adjust bonding power from bonding power generation device (6).
Description
Technical field
The present invention relates to use the manufacture method and the manufacturing installation thereof of the electric-resistance-welded steel pipe of pipeline steel pipe as the conveying of oil or natural gas etc.
Background technology
Natural gas transport with the steel pipe (pipeline steel pipe) that uses in the pipeline etc. in, it requires characteristic to become strict, in order to withstand utmost point low temperature environment (≤-45 ℃) even and the necessity that also becomes the steel pipe of high tenacity under extremely low temperature is improving.
Electric-resistance-welded steel pipe was from just being widely used in pipeline steel pipe in the past, but at this extremely low temperature toughness reguirements, and existing problems aspect the quality of resistance welding seam part (resistance welded portion) almost not have the real achievement of application.This is because the small oxide that produces when carrying out electric welding (resistance welded) also remains in the welding seam part (weld part) after welding finishes, it becomes the main cause that the absorption energy value in the pendulum test reduces under the extremely low temperature, thereby can not stably obtain required toughness value.
All the time, various trials have been implemented in order to reduce this residual minute oxides.Representative art has: cover the steel pipe of welder and weld part periphery fully, the what is called sealing welding of carrying out resistance welded under the state with reduction oxygen concentrations such as inert gases waits (for example with reference to Japanese kokai publication hei 4-178281 communique).
Aforesaid cover fully welder and welder periphery, weld with the sealing of inert gas replacement with atmospheric isolation, extensive practicability in the rolling mill of main minor-diameter steel-tube below making external diameter Φ 165mm, but along with external diameter becomes big, it is big that welder also becomes, it is big that the closed area also must become, industrially be difficult to realize airtight fully, thereby in making the rolling mill that external diameter surpasses the middle diameter steel pipe of Φ 165mm or large diameter steel pipe, use the sealing welding hardly.
At this situation, the applicant has proposed not utilize the sealing welding also can obtain the manufacture method of the electric-resistance-welded steel pipe of the good electric-resistance-welded steel pipe of toughness in TOHKEMY 2007-160383 communique (applying date is after the application's priority date) under extremely low temperature.
That is, produce electric-resistance-welded steel pipe in the following way: the band steel that utilizes rolling formation apparatus will cut into Rack carries out roll forming continuously and forms the opening steel pipe of general tube shape, and resistance welded is carried out in the two edges of this opening steel pipe.Specifically, utilize consequent Joule heat heating, fusion two edges, make two edges that ground connection is carried out crimping then at the logical high frequency electric in each edge of opening steel pipe.
At this moment, in resistance welded in the past, as at the shape of cross section as shown in Fig. 8 A, opening steel pipe edge be shaped as simple rectangle, thereby electric current concentrates near the outer surface and inner surface at edge when energising, reduce in thickness of slab center current density, so the inhomogeneous of the current density of this thickness of slab direction directly cause the inhomogeneous of Temperature Distribution, and then become the low oxide that causes of the temperature that causes the thickness of slab center and discharge bad essential reason.
Therefore, in above-mentioned TOHKEMY 2007-160383 communique, as at the shape of cross section as shown in Fig. 8 B, give the taper (groove shape) of the bight regulation of the outer surface at opening steel pipe edge and inner surface, the current density of eliminating above-mentioned thickness of slab direction thus is inhomogeneous, discharge oxide effectively from weld part, thereby obtain under extremely low temperature, also having the electric-resistance-welded steel pipe of high tenacity.
But in practical operation,, exist the groove shape of giving the edge not form the situation of regulation shape because of as the dimensional variations of the camber angle (bending) of the band steel of mother metal etc., strength variance etc.In this case, there is the Temperature Distribution change of weld part and can not stably produces the possibility of electric-resistance-welded steel pipe with desirable toughness.
Summary of the invention
The present invention In view of the foregoing finishes, its purpose is to provide the manufacture method of the good electric-resistance-welded steel pipe of a kind of toughness of weld part, even there is dimensional variations etc. in the band steel as mother metal, also can stably produce electric-resistance-welded steel pipe with desirable toughness of welded zone.
In order to solve above-mentioned problem, the present invention has following feature.
(1) manufacture method of the good electric-resistance-welded steel pipe of a kind of toughness of weld part, the band steel is configured as the opening steel pipe of general tube shape, resistance welded is carried out in two edges to this opening steel pipe, it is characterized in that, give the edge groove shape of opening steel pipe in advance, and the above-mentioned groove shape of instrumentation before carrying out resistance welded according to this instrumentation result, is adjusted the bonding power of resistance welded.
(2) as the manufacture method of the good electric-resistance-welded steel pipe of the toughness of weld part of record in above-mentioned (1), it is characterized in that, before making electric-resistance-welded steel pipe, obtain in advance with respect to the toughness of the groove depth of groove shape and the relation of bonding power, obtain groove depth and can obtain relation between the bonding power of desirable toughness by the relation of this toughness and bonding power, thereafter, in the manufacture process of electric-resistance-welded steel pipe, the groove depth of the groove shape that instrumentation is endowed, by the above-mentioned groove depth that measures and above-mentioned groove depth and the relation that can obtain the bonding power of desirable toughness, obtain the bonding power that can obtain desirable toughness with respect to the above-mentioned groove depth that measures, adjust the bonding power of resistance welded according to this bonding power of obtaining.
(3) as the manufacture method of the good electric-resistance-welded steel pipe of the toughness of weld part of record in above-mentioned (1) or (2), it is characterized in that, by edge illumination laser slit of illumination, use camera by the edge of this light-struck opening steel pipe in laser crack, instrumentation groove shape to the opening steel pipe.
(4) as the manufacture method of the good electric-resistance-welded steel pipe of the toughness of the weld part of each record in above-mentioned (1) to (3), it is characterized in that, give the method that the method for the edge groove shape of opening steel pipe gives for the method for giving with the edge topping machanism, with rolling formation apparatus in advance or utilize in the method that hole type roll gives any one.
(5) a kind of manufacturing equipment of electric-resistance-welded steel pipe, have with the band steel be configured as general tube shape the opening steel pipe opening steel tube forming unit and the two edges of opening steel pipe are carried out the resistance welded unit of resistance welded, it is characterized in that, be provided with: the groove shape of giving the edge groove shape of opening steel pipe is in advance given the unit; The groove shape calculating unit of the above-mentioned groove shape of instrumentation before carrying out resistance welded; With the bonding power adjustment unit of adjusting the bonding power of resistance welded according to this instrumentation result.
(6) as the manufacturing equipment of the electric-resistance-welded steel pipe of record in above-mentioned (5), it is characterized in that above-mentioned groove shape calculating unit comprises: to the laser slit of illumination irradiation unit of the edge illumination laser slit of illumination of opening steel pipe; Shooting is by the filming apparatus at the opening steel pipe edge of above-mentioned laser slit of illumination irradiation unit irradiation; Carry out the image processing and the image processing apparatus of detection groove shape with photographic images to above-mentioned filming apparatus.
(7) manufacturing equipment of the electric-resistance-welded steel pipe of record in above-mentioned (5) or (6), it is characterized in that, above-mentioned bonding power adjustment unit, by the relation between the groove depth and the groove depth of obtaining in advance that measure by above-mentioned groove shape calculating unit and the bonding power that can obtain desirable toughness, the above-mentioned relatively groove depth that measures is obtained the bonding power that can obtain desirable toughness, adjusts the bonding power of resistance welded according to this bonding power of obtaining.
(8) manufacture method of the good electric-resistance-welded steel pipe of a kind of toughness of weld part, the band steel is configured as the opening steel pipe of general tube shape, resistance welded is carried out in two edges to this opening steel pipe, it is characterized in that, give the edge groove shape of opening steel pipe in advance, the above-mentioned groove shape of instrumentation before carrying out resistance welded, and after resistance welded the oxide amount of this weld part of instrumentation, according to above-mentioned instrumentation result, adjust the bonding power of resistance welded.
(9) as the manufacture method of the good electric-resistance-welded steel pipe of the toughness of weld part of record in above-mentioned (8), it is characterized in that, before making electric-resistance-welded steel pipe, obtain in advance with respect to the toughness of the groove depth of groove shape and the relation of bonding power, obtain groove depth and can obtain relation between the bonding power of desirable toughness by the relation of this toughness and bonding power, and also obtain the relation between the oxide amount of bonding power and weld part, by the relation between the oxide amount of this bonding power and weld part, obtain the relation between the correction factor of the oxide amount of weld part and bonding power, thereafter, in the manufacture process of electric-resistance-welded steel pipe, the groove depth of the groove shape that instrumentation is endowed before carrying out resistance welded, from the above-mentioned groove depth that measures and above-mentioned groove depth and the relation that can obtain the bonding power of desirable toughness, the above-mentioned relatively groove depth that measures is obtained the bonding power that can obtain desirable toughness, adjust the bonding power of resistance welded according to this bonding power of obtaining, the oxide amount of this weld part of instrumentation after resistance welded, from the relation between the correction factor of the oxide amount of above-mentioned oxide amount that measures and above-mentioned weld part and bonding power, the above-mentioned oxide amount that measures is relatively obtained the correction factor of bonding power, adjusts the bonding power of resistance welded according to the correction factor of this bonding power of obtaining.
(10) as the manufacture method of the good electric-resistance-welded steel pipe of the toughness of weld part of record in above-mentioned (8) or (9), it is characterized in that, by edge illumination laser slit of illumination, use camera by the edge of this light-struck opening steel pipe in laser crack, instrumentation groove shape to the opening steel pipe.
(11) as the manufacture method of each above-mentioned electric-resistance-welded steel pipe in above-mentioned (8) to (10), it is characterized in that, utilize the oxide amount of this weld part of ultrasonic metering.
(12) as the manufacture method of the good electric-resistance-welded steel pipe of the toughness of the weld part of each record in above-mentioned (8) to (11), it is characterized in that, give the method that the method for the edge groove shape of opening steel pipe gives for the method for giving with the edge topping machanism, with rolling formation apparatus in advance or utilize in the method that hole type roll gives any one.
(13) a kind of manufacturing equipment of electric-resistance-welded steel pipe, have with the band steel be configured as general tube shape the opening steel pipe opening steel tube forming unit and the two edges of opening steel pipe are carried out the resistance welded unit of resistance welded, it is characterized in that, be provided with: the groove shape of giving the edge groove shape of opening steel pipe is in advance given the unit; The groove shape calculating unit of the above-mentioned groove shape of instrumentation before carrying out resistance welded; Adjust the bonding power adjustment unit of the bonding power of resistance welded with instrumentation result according to above-mentioned groove shape calculating unit and oxide amount instrumentation unit.
Description of drawings
Figure 1A and Figure 1B are respectively the figure of expression one embodiment of the present invention.
Fig. 2 A is the vertical view of the part detail drawing of one embodiment of the present invention, and Fig. 2 B is its cross-sectional view.
Fig. 3 is used for illustrating that the bonding power of one embodiment of the present invention optimizes the figure of the making of curve.
Fig. 4 is the figure that the bonding power in expression one embodiment of the present invention is optimized an example of curve.
Fig. 5 is the figure of correction that is used for illustrating the bonding power of one embodiment of the present invention.
Fig. 6 is the figure of calculating of correction factor that is used for illustrating the bonding power of one embodiment of the present invention.
Fig. 7 is the figure of an example of the correction factor of the bonding power of expression in one embodiment of the present invention.
Fig. 8 A is the figure of the edge of expression opening steel pipe when being rectangle, and Fig. 8 B is the figure when being expressed as the groove shape.
Label declaration
1 band steel (coiled material), 2 edge topping machanisms, 3 rolling formation apparatus, 4 opening steel pipes, 4a, the edge of 4b opening steel pipe, 5a, 5b groove shape, 6 bonding power generation devices (bonding machine), 7 electric-resistance-welded steel pipes, 11 edge shape monitors, 12,12a, 12b laser slit of illumination irradiation unit, 13,13a, 13b image instrumentation camera, 14 arithmetic processing apparatus, 15 supersonic crack detectors
The specific embodiment
Based on the description of drawings embodiments of the present invention.
Figure 1A is used for representing the manufacturing line of one embodiment of the present invention electric-resistance-welded steel pipe.
With the manufacturing line of common electric-resistance-welded steel pipe in the same manner, after utilizing edge topping machanism 2 to cut the edge of the coiled material (band steel) 1 that is cut off into Rack, utilize rolling formation apparatus 3 to carry out making behind the roll forming opening steel pipe 4 of general tube shape continuously, two edges 4a to this opening steel pipe 4,4b carries out resistance welded, promptly at each edge 4a of opening steel pipe 4,4b utilizes bonding power generation device (bonding machine) 6 to pass through high frequency electric, utilize consequent Joule heat with two edges 4a, 4b heating and fusion, then, utilize compression roller (not shown) to make two edges 4a, 4b docks and carries out crimping, thereby produces electric-resistance-welded steel pipe 7.Wherein, on the position in the close downstream of welder (bonding power generation device 6 and compression roller), be provided with the welding bead cutting tool (not shown) of the welding bead (reinforcement of weld) that cutting forms in resistance welded.
In addition, in the present embodiment, utilize edge topping machanism 2, rolling formation apparatus 3 or be used for suitably processing two edges 4a, the hole type roll of 4b (not shown), implement taper processing at the outer surface at band steel 1 width both ends and the bight of inner surface, give the edge 4a of opening steel pipe 4, the groove shape (taper) of 4b shown in Fig. 8 B, and before carrying out resistance welded, utilize edge shape monitor (high accuracy monitor camera) 11 to take edge 4a continuously, 4b, handle and the delicate variation of instrumentation groove shape by carrying out image after this photographic images being input in real time in the arithmetic processing apparatus 14 that is connected with bonding machine 6, obtain best bonding power according to this instrumentation result (sized data), to adjust bonding power from bonding power generation device 6.
Figure 1B is used for representing the manufacturing line of the electric-resistance-welded steel pipe of another embodiment of the present invention.On the basis of Figure 1A embodiment, further after resistance welded, utilize supersonic crack detector 15 to check this weld part (with the corresponding weld part in position of instrumentation groove shape), the oxide of this weld part of instrumentation distributes with will checking data in real time by being input to laggard row operation processing in the arithmetic processing apparatus 14, obtain best bonding power according to the instrumentation result (sized data) of described groove shape and the instrumentation result (oxide amount) of oxide distribution, to adjust bonding power from bonding power generation device 6.
Fig. 2 A and Fig. 2 B are the further explanatory drawings of utilizing above-mentioned edge shape monitor 11 instrumentation groove shapes.Fig. 2 A is a vertical view, and Fig. 2 B is that the A-A of Fig. 2 A is to view (cross-sectional view).
As shown in the figure, edge shape monitor 11 is devices (light shearing device) of combination laser slit of illumination irradiation unit 12 and image instrumentation camera 13, here, its by to a lateral edges 4a of opening steel pipe 4 with the laser slit of illumination irradiation unit 12a of regulation irradiating angle θ from oblique direction laser slit of illumination, shooting is by the image instrumentation camera 13a of the light-struck edge 4a in this laser crack, to the opposite side edge of opening steel pipe 4 4b with the laser slit of illumination irradiation unit 12b of regulation irradiating angle θ from oblique direction laser slit of illumination, constituted by the image instrumentation camera 13b of the light-struck edge 4b in this laser crack with taking.
Thus, utilize image instrumentation camera 13a, 13b to take by the light-struck edge 4a in laser crack, 4b from laser slit of illumination irradiation unit 12a, 12b, utilize 14 pairs of these photographic images of arithmetic processing apparatus to carry out image and handle instrumentation groove shape 5a, 5b separately.Here, the groove depth h at 4 positions shown in special instrumentation Fig. 2 B.
In the embodiment shown in Figure 1B,, utilize the amount of the oxide after the supersonic crack detector 15 instrumentation resistance welded about the position of instrumentation groove shape as described above.
Then, as mentioned above, instrumentation result according to above-mentioned groove depth h obtains best bonding power, adjustment is from the bonding power of bonding power generation device 6, or calculate best bonding power according to the instrumentation result of the oxide amount of the instrumentation result of groove depth h and this weld part, adjustment is from the bonding power of bonding power generation device 6, in the following explanation basic ideas of this moment.
Fig. 3 is used to represent about making the situation of electric-resistance-welded steel pipe behind the two edges 4a that gives opening steel pipe 4,4b groove shape 5a, the 5b, with groove depth h as parameter, (in Fig. 3, convert with the time per unit unit are, unit is kW/ (second mm to put out bonding power in order
2)) and the toughness (pendulum test transition temperature) of welding seam part between an example of relation.Here, test the toughness that transition temperature (following brief note is a transition temperature) is represented welding seam part with pendulum, establishing the coiled material thickness t is 12.7mm, and groove depth h is changed with 2mm, 3mm, 4mm, and, also represent the situation (square groove) of haunting and giving the groove shape in order to compare.Wherein, Fig. 3 is used for representing qualitatively the relation of bonding power and toughness, has omitted the value of bonding power.
From Fig. 3 can be clear and definite be, compare with the situation of not giving the groove shape, under the situation of giving the groove shape, it is bigger that transition temperature reduces, toughness increases substantially, and shows the effect of giving the groove shape.
Wherein, under the identical situation of groove depth, transition temperature reduces maximum bonding powers (blank spot among Fig. 3) and changes because of groove depth.In other words, even carry out resistance welded with best bonding power accordingly with certain groove depth, when groove depth changes, under this bonding power, also can break away from best bonding power, toughness (transition temperature) change is bigger.
Therefore, in the present embodiment,, the change (deviation) of toughness (transition temperature) is minimized by adjusting bonding power W accordingly so that it becomes the best bonding power under this groove depth h with the variation of groove depth h.
That is, as shown in Figure 4, establishing transverse axis is that (in Fig. 4, convert with the time per unit unit are, unit is kW/ (second mm to best bonding power W
2)), establish the longitudinal axis and be (total groove depth 2h/ coiled material thickness t), draw that transition temperature reduces maximum bonding powers (blank spot among Fig. 3) and the curve that obtains becomes the bonding power corresponding with the variation of groove depth h and optimizes curve (bonding power fair curve).And according to the instrumentation result of above-mentioned groove depth h, optimize curve by this bonding power and obtain best bonding power for this groove depth h, bonding power W is set at this best bonding power.Wherein, Fig. 4 is used for representing qualitatively the best bonding power and the longitudinal axis (total groove depth 2h/ coiled material thickness t), has omitted the value of best bonding power.
Perhaps, bonding power W is set at best bonding power under the primary objective groove depth hm (for example 3mm) (promptly in Fig. 4, with the situation of groove depth 3mm as initial point), accordingly bonding power W is only revised the variation of best bonding power with the bias of groove depth.
Wherein, the bonding power of Fig. 4 is optimized curve (bonding power fair curve) and was made in advance before beginning to make (operation) electric-resistance-welded steel pipe, when making the electric-resistance-welded steel pipe of identical type, utilize identical bonding power to optimize curve (bonding power fair curve).
But, even carry out aforesaid control, sometimes also can be because of the change of operating condition etc., residual fine oxide on weld part and cause fragility to reduce.
Therefore, in order more stably to produce electric-resistance-welded steel pipe with desirable toughness of welded zone, the oxide amount of weld part after the instrumentation resistance welded, this instrumentation result is fed back to bonding power generation device 6 backs by arithmetic processing apparatus 14 adjust bonding power, stably to reduce the oxide amount of weld part.At this moment, generally under the many situations of oxide amount, bonding power is increased and the floating of accelerating oxidation thing removed.
The measuring method of the oxide amount of weld part (the particularly minute oxides that the toughness of weld part is exerted an influence (several 100 μ m are following) amount) uses known method.Disclosed additive method carries out instrumentation in the ultrasonic testing that for example can be by disclosed use array type probe in the TOHKEMY 2007-163470 communique (applying date is after the application preferential day) or the document.
Feedback method when following illustration is used the ultrasonic testing that has utilized array type probe.
An example of instrumentation value of expression supersonic crack detector 15 (average echo height (%)) and endergonic relation in Fig. 5.Wherein, between instrumentation value (average echo height (%)) and fine oxide amount, there is correlation.In this example, when average echo height 0～20% the time, the oxide amount of weld part can obtain sufficient toughness.
Therefore, under the bonding power of setting according to Fig. 4, obtain in advance as illustrated in fig. 6 and carry out the average echo height (=oxide amount) of the weld part after the resistance welded with various conditions (shape of former material, material, tubulation speed etc.) (unit is kW/ (second mm with bonding power
2)) relation.Wherein, Fig. 6 is used for representing qualitatively the relation of average echo height and bonding power, omits the value of bonding power.
Then, as the example of Fig. 5, when average echo height is following about 20%, can guarantee under the situation of high tenacity that a reference value of establishing average echo height is 20%, the correction factor of the bonding power when obtaining average echo height and be x% by following formula according to Fig. 6.
Correction factor=(bonding power)
Echo height=20%/ (bonding power)
Echo height=x%
Here, (bonding power)
Echo height=20%Be the bonding power during average echo height 20% among Fig. 6, (bonding power)
Echo height=x%Be the bonding power during average echo height x% among Fig. 6.
Fig. 7 represents the average echo height as above obtained and the relation of correction factor.
Wherein, the correction factor of the bonding power of Fig. 7 was made before beginning to make (operation) electric-resistance-welded steel pipe in advance, utilized identical correction factor when making the electric-resistance-welded steel pipe of identical type.
For example, be 100% o'clock with the average echo height of the weld part after carrying out resistance welded at the bonding power of setting under certain condition, correction factor is 1.05 as can be seen from Figure 7, thereby is controlled to the bonding power that sets and multiply by 1.05 and the bonding power that obtains.Wherein, if the average echo height that is measured then can not change welding condition (correction factor is 1) 0～20%.
And, preferably, after just carrying out resistance welded, utilize supersonic crack detector 15 instrumentation oxide amounts.Particularly, preferably supersonic crack detector 15 is close to and is configured in welding bead cutting tool back.This is because owing to many more away from the cost of welder time, thereby as feedack, precision reduces.
Above-mentioned control method only is an example, can certainly adopt and adjust bonding power so that average echo height is converged in the additive method in 0～20% scope.
Thus, combination can realize the optimization of bonding power based on groove depth h instrumentation result's FEEDFORWARD CONTROL with based on the FEEDBACK CONTROL of oxide amount instrumentation result (average echo height).
As mentioned above, in embodiments of the present invention, by giving the edge 4a of opening steel pipe 4,4b groove shape (taper) 5a, 5b, the current density uniformity of temperature profile of thickness of slab direction when making resistance welded, minute oxides after the minimizing resistance welded in the weld seam, can obtain good utmost point low-temperature flexibility, and, the groove shape 5a that gives by instrumentation, the variation of 5b, bonding power is adjusted into and this groove shape 5a, the bonding power of the best of 5b correspondence, even thereby because of dimensional variations as the band steel 1 of mother metal, unavoidable causes such as strength variance make groove shape 5a, under the situation that 5b changes, the deviation that also can suppress toughness of welded zone stably produces electric-resistance-welded steel pipe with desirable toughness (particularly up to the present be difficult to make the electric-resistance-welded steel pipe that is suitable for utmost point low temperature applications).
And, by the oxide amount of this weld part of instrumentation, bonding power is adjusted into bonding power with this groove shape 5a, the best that 5b is corresponding, can produce more stable high tenacity electric-resistance-welded steel pipe.
In practical operation, Once you begin make, then can not measure the coiled material 1 of continuous-flow or groove shape 5a, the 5b of opening steel pipe 4 manually.Suppose promptly to enable to measure groove shape 5a, 5b, if the structure that the bonding power of bonding machine 6 is changed in real time automatically then can not be brought into play effect on industrial production.Therefore, applicability of the present invention is very high.
In the above description, when giving groove shape 5a, 5b, can give by edge topping machanism 2, also can (for example utilize fin roller (finpass roll)) in rolling formation apparatus 3 gives, or utilize hole type roll (not shown) to give, but it is because dimensional accuracy becomes well as far as possible when giving groove shape 5a, 5b near the stage of bonding machine 6, thereby preferred.
And, according to circumstances, when instrumentation groove shape 5a, 5b, the groove depth of instrumentation opening steel pipe 4 any one face side (for example outer surface side) only.In this case, the longitudinal axis of Fig. 4 can be organized into (any one the groove depth h/ coiled material thickness t that measures).
And the instrumentation of groove shape 5a, 5b also can carry out in the following manner: do not utilize laser slit of illumination irradiation unit 12, and take edge 4a, the 4b of opening steel pipes 4 with image instrumentation camera 13, according to the shade of this photographic images, calculate groove depth h.
And give the situation of any one face side groove shape in the outer surface side of opening steel pipe 4 and the inner surface side in addition.
And, the bonding power that figure 4 illustrates an example is optimized curve (bonding power fair curve), in arithmetic processing apparatus 14, can be used as empirical formula keeps, also can be used as the database as parameter such as the ratio of groove depth, groove depth and coiled material thickness, bonding power is kept, also can make the groove depth that measures be applicable to this empirical formula and calculate bonding power or comparable data storehouse (value in interpolative data storehouse if necessary) calculates bonding power by the groove depth that measures.This for show at Fig. 7 an example based on also identical for the correction factor (correction factor curve) of oxide (average echo height).
And, in the above-described embodiment, make the bonding power of Fig. 4 by the bonding power of the minimum transition temperature of conduct of Fig. 3 and optimize curve (bonding power fair curve), but the invention is not restricted to this.For example, also can make bonding power and optimize curve (bonding power fair curve) by the scope of the bonding power corresponding with the transition temperature that can obtain desirable toughness (for example desired specification of electric-resistance-welded steel pipe).In this case, bonding power is optimized curve (bonding power fair curve) and is become band shape, adjusts bonding power in this band shape scope.For show at Fig. 7 an example based on also identical for the correction factor (correction factor curve) of oxide (average echo height).
Utilize possibility on the industry
In the present invention, in carrying out mass-produced practical operation, even because of as mother metal The unavoidable cause such as the change of band steel dimensions, strength variance and cause giving the open steel tube edge In the situation of the groove shape change of edge, also can suppress the deviation of toughness of welded zone, stable Produce electric-resistance-welded steel pipe with desirable toughness and (particularly up to the present be difficult to system The electric-resistance-welded steel pipe that is suitable for utmost point low temperature applications of making), thus industrially very useful.
Claims (13)
1. the manufacture method of an electric-resistance-welded steel pipe with being with steel to be configured as the opening steel pipe of general tube shape, is carried out resistance welded to the two edges of this opening steel pipe, it is characterized in that,
Give the edge groove shape of opening steel pipe in advance, and before carrying out resistance welded the described groove shape of instrumentation, according to this instrumentation result, adjust the bonding power of resistance welded.
2. the manufacture method of electric-resistance-welded steel pipe as claimed in claim 1, it is characterized in that, before making electric-resistance-welded steel pipe, obtain in advance with respect to the toughness of the groove depth of groove shape and the relation of bonding power, obtain groove depth and can obtain relation between the bonding power of desirable toughness by the relation of this toughness and bonding power
Thereafter, in the manufacture process of electric-resistance-welded steel pipe, the groove depth of the groove shape that instrumentation is endowed, by the described groove depth that measures and described groove depth and the relation that can obtain the bonding power of desirable toughness, the described relatively groove depth that measures is obtained the bonding power that can obtain desirable toughness, adjusts the bonding power of resistance welded according to this bonding power of obtaining.
3. the manufacture method of electric-resistance-welded steel pipe as claimed in claim 1 or 2 is characterized in that, by the edge illumination laser slit of illumination to the opening steel pipe, uses camera by the edge of this light-struck opening steel pipe in laser crack, instrumentation groove shape.
4. as the manufacture method of each described electric-resistance-welded steel pipe in the claim 1 to 3, it is characterized in that, give the method that the method for the edge groove shape of opening steel pipe gives for the method for giving with the edge topping machanism, with rolling formation apparatus in advance or utilize in the method that hole type roll gives any one.
5. the manufacturing equipment of an electric-resistance-welded steel pipe, have with the band steel be configured as general tube shape the opening steel pipe opening steel tube forming unit and the two edges of opening steel pipe are carried out the resistance welded unit of resistance welded, it is characterized in that, be provided with:
Give the groove shape of the edge groove shape of opening steel pipe in advance and give the unit; The groove shape calculating unit of the described groove shape of instrumentation before carrying out resistance welded; With the bonding power adjustment unit of adjusting the bonding power of resistance welded according to this instrumentation result.
6. the manufacturing equipment of electric-resistance-welded steel pipe as claimed in claim 5 is characterized in that, described groove shape calculating unit comprises: to the laser slit of illumination irradiation unit of the edge illumination laser slit of illumination of opening steel pipe; Shooting is by the filming apparatus at the opening steel pipe edge of described laser slit of illumination irradiation unit irradiation; Carry out the image processing and the image processing apparatus of detection groove shape with photographic images to described filming apparatus.
7. as the manufacturing equipment of claim 5 or 6 described electric-resistance-welded steel pipes, it is characterized in that, described bonding power adjustment unit, by the relation between the groove depth and the groove depth of obtaining in advance that measure by described groove shape calculating unit and the bonding power that can obtain desirable toughness, the described relatively groove depth that measures is obtained the bonding power that can obtain desirable toughness, adjusts the bonding power of resistance welded according to this bonding power of obtaining.
8. the manufacture method of an electric-resistance-welded steel pipe with being with steel to be configured as the opening steel pipe of general tube shape, is carried out resistance welded to the two edges of this opening steel pipe, it is characterized in that,
Give the edge groove shape of opening steel pipe in advance, the described groove shape of instrumentation before carrying out resistance welded, and after resistance welded the oxide amount of this weld part of instrumentation, adjust the bonding power of resistance welded according to described instrumentation result.
9. the manufacture method of electric-resistance-welded steel pipe as claimed in claim 8; It is characterized in that; Before making electric-resistance-welded steel pipe; Obtain in advance with respect to the toughness of the groove depth of groove shape and the relation of bonding power; Obtain groove depth and can obtain relation between the bonding power of desirable toughness by the relation of this toughness and bonding power; And also obtain the relation between the oxide amount of bonding power and weld part; By the relation between the oxide amount of this bonding power and weld part; Obtain the relation between the correction factor of the oxide amount of weld part and bonding power
Thereafter, in the manufacture process of electric-resistance-welded steel pipe,
The groove depth of the groove shape that instrumentation is endowed before carrying out resistance welded, by the described groove depth that measures and described groove depth and the relation that can obtain the bonding power of desirable toughness, the described relatively groove depth that measures is obtained the bonding power that can obtain desirable toughness, adjust the bonding power of resistance welded according to this bonding power of obtaining, and
The oxide amount of this weld part of instrumentation after resistance welded, by the relation between the correction factor of the oxide amount of described oxide amount that measures and described weld part and bonding power, the described oxide amount that measures is relatively obtained the correction factor of bonding power, adjusts the bonding power of resistance welded according to the correction factor of this bonding power of obtaining.
10. the manufacture method of electric-resistance-welded steel pipe as claimed in claim 8 or 9 is characterized in that, by edge illumination laser slit of illumination to the opening steel pipe, with camera by the edge of this light-struck opening steel pipe in laser crack, instrumentation groove shape.
11. the manufacture method as each described electric-resistance-welded steel pipe in the claim 8 to 10 is characterized in that, utilizes the oxide amount of this weld part of ultrasonic metering.
12. manufacture method as each described electric-resistance-welded steel pipe in the claim 8 to 11, it is characterized in that, give the method that the method for the edge groove shape of opening steel pipe gives for the method for giving with the edge topping machanism, with rolling formation apparatus in advance or utilize in the method that hole type roll gives any one.
13. the manufacturing equipment of an electric-resistance-welded steel pipe, have with the band steel be configured as general tube shape the opening steel pipe opening steel tube forming unit and the two edges of opening steel pipe are carried out the resistance welded unit of resistance welded, it is characterized in that, be provided with:
Give the groove shape of the edge groove shape of opening steel pipe in advance and give the unit; The groove shape calculating unit of the described groove shape of instrumentation before carrying out resistance welded; The oxide amount instrumentation unit of the oxide amount of this weld part of instrumentation after resistance welded; Adjust the bonding power adjustment unit of the bonding power of resistance welded with instrumentation result according to described groove shape calculating unit and oxide amount instrumentation unit.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP031714/2007 | 2007-02-13 | ||
| JP2007031714 | 2007-02-13 | ||
| JP2007046802 | 2007-02-27 | ||
| JP046802/2007 | 2007-02-27 | ||
| PCT/JP2008/052592 WO2008099943A1 (en) | 2007-02-13 | 2008-02-08 | Seam-welded steel pipe manufacturing method and its manufacturing apparatus |
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| CN101610869A true CN101610869A (en) | 2009-12-23 |
| CN101610869B CN101610869B (en) | 2011-11-30 |
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| CN2008800049167A Active CN101610869B (en) | 2007-02-13 | 2008-02-08 | Seam-welded steel pipe manufacturing method and its manufacturing apparatus |
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| JP (1) | JP4998739B2 (en) |
| CN (1) | CN101610869B (en) |
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| CN107249806A (en) * | 2015-03-10 | 2017-10-13 | 杰富意钢铁株式会社 | The manufacture method of the Manufacturing Status monitoring method of resistance welding steel pipe, the Manufacturing Status supervising device of resistance welding steel pipe and resistance welding steel pipe |
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| CN109689237A (en) * | 2016-11-08 | 2019-04-26 | 新日铁住金株式会社 | Weld monitoring arrangement and welding monitoring method |
| CN114390955A (en) * | 2019-09-10 | 2022-04-22 | Sms集团有限公司 | Internal welding of pipes and profiles |
| CN114390955B (en) * | 2019-09-10 | 2023-08-04 | Sms集团有限公司 | Internal welding of pipes and profiles |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101610869B (en) | 2011-11-30 |
| JP2008221335A (en) | 2008-09-25 |
| JP4998739B2 (en) | 2012-08-15 |
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