CN106514023A - Device and method for eliminating pipeline bounce and misalignment and guaranteeing clearance of laser welded thinned pipe - Google Patents

Abstract

The invention discloses a method and a device thereof for eliminating jumping and misalignment of thin tube lines made by laser welding and ensuring gaps. The device comprises: a first tube rolling mechanism, a second tube rolling mechanism, a third tube rolling mechanism and a welding clamping mechanism arranged in sequence. The method includes: a. Pretreatment of the steel strip; b. Rolling the edge of the steel strip to 0.9-1.0 times the radius of the welded pipe to be prepared; c. Rolling the steel strip to a height of 1.0-1.6 times the radius of the welded pipe to be prepared; d. 1. Roll the edge height of the steel strip to 1.6 to 2.0 times the radius of the welded pipe to be prepared; e. Perform welding. The beneficial effect of the present invention is: it can effectively eliminate the jumping of the pipeline, misalignment and ensure the gap when laser welding thin tubes, and improve the qualified rate of products; The production link has improved productivity.

Description

A device for eliminating jumping and misalignment of laser-welded thin-tube pipelines and ensuring gaps, and its method

technical field

The invention relates to the field of metal processing, in particular to a device and a method for eliminating jumping and misalignment of laser-welded thin tubes and pipelines and ensuring gaps.

Background technique

Laser welding technology is the best way to produce thin-walled steel pipes. It can not only increase the production efficiency of welded pipes by 2 to 3 times (compared with TIG), but also improve the welding quality and obtain steel pipe properties that are difficult to achieve with other production methods. In recent years, due to the development of laser welding technology and equipment, the weld quality of thin-walled welded pipes produced by laser welding has been significantly improved, and the scrap rate of cold forming has been reduced to less than 0.5%. In view of the good processing characteristics of laser welded pipes, more and more parts companies tend to adopt laser welding methods for the production of stainless steel thin-walled welded pipes for high-end cars and complexly processed pipe fittings.

Laser welding of thin-walled steel pipes is to first make the steel strip into a tube blank, and then roll the edge of the tube blank to a gap value smaller than the diameter of the laser beam focus, and the focus of the laser beam falls evenly on the edge of the welded tube blank . Due to the high unit density of the laser beam, the welding process can be completed at a high speed regardless of whether the welding wire is used in the protective atmosphere.

Compared with traditional argon arc welding, the production of steel pipes by laser welding technology must carefully handle the edge of the tube blank and its welded edge joint. For example, when welding thin-walled steel pipes with a wall thickness of 0.5-1.5mm, the welding edge joint is required to meet the following conditions: ①The edge gap value of the welding place should not be greater than 0.04-0.08mm; ②The offset of the edge of the tube blank Not greater than 5% to 10% of the rated wall thickness; ③The non-parallelism of the adjacent end faces of the edge of the welded tube blank should be kept within the allowable gap value; ④The horizontal stability of the edge surface of the welded tube blank is ±1mm.

Therefore, the beating, gap change and misalignment of the pipeline to be welded on the laser welding production line are problems that must be solved to restrict the transformation of the production line.

Contents of the invention

The purpose of the present invention is to provide a device for eliminating jumping and edge misalignment of thin tubes made by laser welding and ensuring gaps, which can effectively eliminate jumping, edge misalignment and ensure gaps of pipelines when laser welding thin tubes, and improve the qualified rate of products.

Another object of the present invention is to provide a method for eliminating jumping and misalignment of laser-welded thin tubes and ensuring gaps, which can effectively eliminate jumping, misalignment and ensure gaps of pipelines when laser welding thin tubes, and improve the product qualification rate.

In order to achieve the above purpose, the present invention adopts the following technical solution, a device for eliminating jumping and misalignment of laser-welded thin-tube pipelines and ensuring gaps, including:

The first tube rolling mechanism, the second tube rolling mechanism, the third tube rolling mechanism and the welding clamping mechanism are arranged in sequence; the steel plate passes through the first tube rolling mechanism, the second tube rolling mechanism, the third tube rolling mechanism and the welding clamp in sequence supporting institutions;

The first coil mechanism consists of:

platform and beams fixed on the platform;

A plurality of pairs of first outer forming transfer rollers, which are rotatably arranged vertically on the platform, with a distance between each pair of first outer forming transfer rollers;

First inner forming transfer rolls rotatably mounted on said beam between each pair of first outer forming transfer rolls with a squeeze between said first outer forming transfer rolls and first inner forming transfer rolls The pressure plate forms an arc-shaped gap;

Wherein, the outer contour of the first outer forming transfer roller is composed of a plane structure tangent to the first arc surface structure; the outer contour of the first inner forming transfer roller and the first outer The outer contours of the forming transfer rolls are matched.

Preferably, the second tube rolling mechanism includes:

A plurality of pairs of second outer forming transfer rollers, which are rotatably arranged vertically on the platform, and each pair of second outer forming transfer rollers are close to each other; the outer contour of the second outer forming transfer rollers is provided with a second arc surface structure;

Second inner forming transfer rolls, which are rotatably mounted on said crossbeam, and located between each pair of second outer forming transfer rolls; at least five of said second outer forming transfer rolls are disposed between each pair of second outer forming transfer rolls Internal forming transfer rolls.

Preferably, the third tube rolling mechanism includes:

A plurality of pairs of third outer forming transfer rollers, which are rotatably vertically arranged on the platform, with a distance between each pair of third outer forming transfer rollers;

rigid backing bars disposed between pairs of third outer forming transfer rolls via backing bar support bars;

Wherein, the outer contour of the third outer forming transfer roller is provided with a third arc surface structure; the rigid support rod is a semi-cylindrical body, and a plurality of pairs of support rods distributed along the axial direction are arranged on the rigid support rod Wheel roller, the rigid support bar matches with the third arc surface structure.

Preferably, the welding clamping mechanism includes

The fixed pipe hole block is erected on the platform, and a cavity is arranged inside the fixed pipe hole block;

a pair of fourth conveying rollers, which are rotatably arranged in the cavity, where the fourth conveying rollers cooperate with each other for fixing and conveying the steel pipe;

Wherein, the outer contour of the fourth conveying roller is provided with a fourth arc surface structure.

A method for eliminating jumping and misalignment of laser-welded thin-tube pipelines and ensuring gaps, including:

a. Transport the steel strip to the platform, and roll the edge height of the steel strip to 0.9 to 1.0 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls and first inner forming transfer rolls;

b. Rolling the edge height of the steel strip processed in step a to 1.0 to 1.6 times the radius of the welded pipe to be prepared by multiple pairs of the second outer forming transfer roll and the second forming transfer roll;

c. Rolling the edge height of the steel strip processed in step b to 1.6 to 2.0 times the radius of the welded pipe to be prepared by using multiple pairs of third external forming transfer rollers and rigid support rods to obtain a tube blank;

d. Fix the tube blank obtained after the treatment in step c by fixing the tube hole block, and perform laser welding on the tube blank under a protective gas.

Preferably, the method further includes: performing pretreatment on the steel pipe before step a, the pretreatment including carrying out surface pickling, cold rolling and annealing on the steel strip.

Preferably, the annealing temperature is 875-885° C., and the annealing time is 5.5-6.5 hours.

Preferably, it is characterized in that:

In the step a, the number of sets of the plurality of pairs of first outer forming transfer rolls and first inner forming transfer rolls is 5 to 100 sets, the distance is 10 to 200 mm, and the rotation speed is 10 to 1000 mm/min;

In the step b, the number of sets of the plurality of pairs of second outer forming transfer rolls and second inner forming transfer rolls is 5-100 sets, the distance is 10-200 mm, and the rotation speed is 10-1000 mm/min;

In the step c, the number of pairs of third forming transfer rolls is 5-100 sets, the distance is 10-200 mm, and the rotation speed is 10-1000 mm/min.

Preferably, the laser power is 900-1100W, the welding speed is 12-14m/min; the direction of the shielding gas is coaxial with the direction of the laser beam.

Preferably, the thickness of the steel strip after cold rolling is 0.5-1.5mm.

The beneficial effects of the present invention are as follows: 1. It can effectively eliminate the jumping of the pipeline, misalignment and ensure the gap when laser welding thin tubes, and improve the product qualification rate; 2. The diameter of the pipe produced by this method directly meets the production requirements, and the welding pipe fixed diameter of the production link, improving productivity.

Description of drawings

Fig. 1 is the schematic diagram of pipe forming machine in the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 1;

Fig. 4 is the C-C sectional view of Fig. 1;

Fig. 5 is a D-D sectional view of Fig. 1;

Fig. 6 is a sectional view along line E-E of Fig. 1 .

detailed description

The invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

As shown in Figures 1-6, the device 1 for eliminating jumping and misalignment of laser-welded thin tube pipelines and ensuring gaps includes: a first coiling mechanism 110, a second coiling mechanism 120, and a third coiling mechanism arranged in sequence. The pipe mechanism 130 and the welding clamping mechanism 140; the steel plate 2 passes through the first pipe rolling mechanism 110, the second pipe rolling mechanism 120, the third pipe rolling mechanism 130 and the welding clamping mechanism 140 in sequence.

The first coiling mechanism 110 includes: a platform 150 and a crossbeam 116 fixed on the platform; multiple pairs of first outer forming transfer rollers 112 are rotatably vertically arranged on the platform 150, and each pair of first outer forming transfer rollers 112 is provided with Spacing; first inner forming transfer rolls 117 are rotatably disposed on said beam 116 and between each pair of first outer forming transfer rolls 112, said first outer forming transfer rolls 112 and first inner forming transfer rolls There is an arc-shaped gap formed by extruded steel plates between 117; wherein, the outer contour of the first outer forming transfer roll 112 is composed of a plane structure tangent to the first arc surface structure; the second The outer contour of an inner profiled transfer roll 112 matches the outer profile of said first outer shaped transfer roll 117 . As a preference, the first external forming transfer roll 112 and the first internal forming transfer roll 117 are installed side by side on the platform 150 and the beam 116 through the external fixed shaft 114 and the internal fixed shaft 118 respectively, and the external fixed shaft 114 An external bearing 113 and an internal bearing 119 are respectively provided at both ends of the internal fixed shaft 118 .

In another embodiment, the second coiling mechanism 120 includes: multiple pairs of second outer forming transfer rollers 122 are rotatably arranged vertically on the platform 150, and each pair of second outer forming transfer rollers 122 is close to each other; The outer contour of the outer forming transfer roller 122 is provided with a second arc surface structure; the second inner forming transfer roller 126 is rotatably arranged on the crossbeam 125, and is located between each pair of second outer forming transfer rollers 122; each pair At least five of said second inner forming transfer rolls 126 are arranged between the second outer forming transfer rolls 122 . As a preference, the second outer forming transfer roller 122 and the second inner forming transfer roller 126 are installed on the platform 150 and the beam 125 through the outer fixed shaft 124 and the inner fixed shaft 127 respectively, and the outer fixed shaft 124 and the two ends of the inner fixed shaft 127 are respectively provided with an outer bearing 123 and an inner bearing 128 .

In another embodiment, the third coiling mechanism 130 includes: multiple pairs of third outer forming transfer rollers 132 are rotatably arranged vertically on the platform 150, and there is a set between each pair of third outer forming transfer rollers 132 Spacing; Rigid support bar 137 is arranged between many pairs of the third outer forming transfer roll 132 through the support bar 136; wherein, the outer contour of the third outer forming transfer roll 132 is provided with a third arc surface structure; The rigid support rod 137 is a semi-cylindrical body, on which there are a plurality of pairs of support rod wheel rollers 137d distributed along the axial direction, and the rigid support rod is matched with the structure of the third arc surface. As a preference, the third external forming transfer roller 132 is installed on the platform 150 through the external fixed shaft 134, and the two ends of the external fixed shaft 134 are provided with external bearings 133, between the external fixed shafts 134 A connecting beam 135 is provided, and the middle part of the connecting beam 135 is connected with the support bar 136 . As a further preference, the rigid support bar 137 includes: a support bar body 137a, and a plurality of pairs of support bar wheel rollers 137d are rotatably arranged on the support bar body 137a. 137c is disposed on the support rod body 137a, and bearings 137b are provided at both ends of the fixed shaft 137c. As a further preference, an axial groove is provided on the support rod body 137a.

In another embodiment, the welding clamping mechanism 140 includes: a fixed pipe hole block 142 erected on the platform 150, a cavity is provided inside the fixed pipe hole block 142; a pair of fourth conveying rollers 141 can rotate The fourth conveying rollers 141 cooperate with each other for fixing and conveying steel pipes; the outer contour of the fourth conveying rollers 141 is provided with a fourth arc surface structure. As a preference, the fourth conveying roller 141 is disposed in the cavity through a fixed shaft 144 , and bearings 143 are provided at both ends of the fixed shaft 144 . The space between the pair of fourth conveying rollers 141 matches the outer circumference of the steel pipe.

Example 1

a. Surface pickling, cold rolling and annealing are carried out to the steel strip 2; the annealing temperature is 880° C., the annealing time is 6 hours, and the thickness of the steel strip after cold rolling is a steel strip with a thickness of 0.8 mm;

b. The pretreated steel strip is transported to the platform, and the height of the edge of the steel strip is rolled to 0.95 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117; Wherein, the number of sets of the plurality of pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117 is 50 sets, the distance is 100 mm, and the rotation speed is 500 mm/min.

c. Roll the edge height of the steel strip processed in step b to 1.3 times the radius of the welded pipe to be prepared by multiple pairs of second outer forming transfer rolls 122 and second forming transfer rolls 126; wherein, the plurality of pairs of second outer The number of sets of the forming transfer roller 122 and the second forming transfer roller 126 is 50 sets, the distance is 100 mm, and the rotation speed is 500 mm/min.

d. Roll the edge height of the steel strip processed in step c to 1.8 times the radius of the welded pipe to be prepared by multiple pairs of third external forming transfer rolls 132 and rigid support rods 173 to obtain a tube blank; multiple pairs of third forming transfer rolls The number of sets is 50 sets, the spacing is 100mm, and the rotation speed is 500mm/min.

e. Fix the steel strip obtained after the treatment in step d by fixing the tube hole block, and perform laser welding on the tube blank under the protective gas. The laser power is 1000W, and the welding speed is 13m/min. Wherein, the direction of the shielding gas is coaxial with the direction of the laser beam. The shielding gas is argon.

Example 2

a. Surface pickling, cold rolling and annealing are carried out to the steel strip 2; the annealing temperature is 885° C., the annealing time is 5.5 hours, and the thickness of the steel strip after cold rolling is 0.5 mm;

b. Transport the pretreated steel strip to the platform, and roll the edge height of the steel strip to 1.0 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117; Wherein, the number of sets of the plurality of pairs of first outer forming transfer rollers 112 and first inner forming transfer rollers 117 is 5 sets, the distance is 200 mm, and the rotation speed is 10 mm/min.

c. Roll the edge height of the steel strip processed in step b to 1.6 times the radius of the welded pipe to be prepared by multiple pairs of second external forming transfer rolls 122 and second forming transfer rolls 126; wherein, the multiple pairs of second The number of sets of the outer forming transfer roller 122 and the second forming transfer roller 126 is 5 sets, the distance is 200 mm, and the rotation speed is 10 mm/min.

d. Roll the edge height of the steel strip processed in step c to 2.0 times the radius of the welded pipe to be prepared by multiple pairs of third external forming transfer rolls 132 and rigid support rods 173 to obtain a tube blank; multiple pairs of third forming transfer rolls The number of sets is 5 sets, the spacing is 200mm, and the rotation speed is 10mm/min.

e. Fix the steel strip obtained after the treatment in step d by fixing the tube hole block, and perform laser welding on the tube blank under the protective gas. The laser power is 900W, and the welding speed is 12m/min. Wherein, the direction of the shielding gas is perpendicular to the direction of the laser beam. The shielding gas is argon.

Example 3

a. Carry out surface pickling, cold rolling and annealing treatment to the steel strip 2; the annealing temperature is 875° C., the annealing time is 6.5 hours, and the thickness of the steel strip after cold rolling is a steel strip with a thickness of 1.5 mm;

b. The pretreated steel strip is transported to the platform, and the height of the edge of the steel strip is rolled to 0.9 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117; Wherein, the number of sets of the plurality of pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117 is 100 sets, the distance is 10 mm, and the rotation speed is 1000 mm/min.

c. Roll the edge height of the steel strip processed in step b to 1.0 times the radius of the welded pipe to be prepared by multiple pairs of second outer forming transfer rolls 122 and second forming transfer rolls 126; wherein, the plurality of pairs of second outer The number of sets of forming transfer rollers 122 and second forming transfer rollers 126 is 100 sets, the distance is 10 mm, and the rotation speed is 1000 mm/min.

d. Roll the edge height of the steel strip processed in step c to 1.6 times the radius of the welded pipe to be prepared by multiple pairs of third external forming transfer rolls 132 and rigid support rods 173 to obtain a tube blank; multiple pairs of third forming transfer rolls The number of sets is 100 sets, the spacing is 10mm, and the speed is 1000mm/min.

e. Fix the steel strip obtained after the treatment in step d by fixing the tube hole block, and perform laser welding on the tube blank under the protective gas. The laser power is 1100W, and the welding speed is 14m/min. Wherein, the direction of the shielding gas and the direction of the laser beam form an included angle of 30°. The shielding gas is argon.

Example 4

a. Carry out surface pickling, cold rolling and annealing treatment to the steel strip 2; the annealing temperature is 878° C., the annealing time is 6.3 hours, and the thickness of the steel strip after cold rolling is a steel strip with a thickness of 1.2 mm;

b. The pretreated steel strip is transported to the platform, and the height of the edge of the steel strip is rolled to 0.92 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117; Wherein, the number of sets of the plurality of pairs of first outer forming transfer rollers 112 and first inner forming transfer rollers 117 is 80 sets, the distance is 50 mm, and the rotation speed is 200 mm/min.

c. Roll the edge height of the steel strip processed in step b to 1.4 times the radius of the welded pipe to be prepared by multiple pairs of second outer forming transfer rolls 122 and second forming transfer rolls 126; wherein, the plurality of pairs of second outer The number of sets of the forming transfer roller 122 and the second forming transfer roller 126 is 80 sets, the distance is 50 mm, and the rotation speed is 200 mm/min.

d. Roll the edge height of the steel strip processed in step c to 1.9 times the radius of the welded pipe to be prepared by multiple pairs of third external forming transfer rolls 132 and rigid support rods 173 to obtain a tube blank; multiple pairs of third forming transfer rolls The number of sets is 80 sets, the spacing is 50mm, and the speed is 200mm/min.

e. Fix the steel strip obtained after the treatment in step d by fixing the tube hole block, and perform laser welding on the tube blank under the protective gas. The laser power is 950W, and the welding speed is 13.5m/min. Wherein, the direction of the shielding gas and the direction of the laser beam form an included angle of 60°. The shielding gas is argon.

Example 5

a. Carry out surface pickling, cold rolling and annealing treatment to the steel strip 2; the annealing temperature is 881° C., the annealing time is 5.7 hours, and the thickness of the steel strip after cold rolling is a steel strip with a thickness of 0.8 mm;

b. The pretreated steel strip is transported to the platform, and the height of the edge of the steel strip is rolled to 0.97 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117; Wherein, the number of sets of the plurality of pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117 is 40 sets, the distance is 120 mm, and the rotation speed is 800 mm/min.

c. Roll the edge height of the steel strip processed in step b to 1.5 times the radius of the welded pipe to be prepared by multiple pairs of second outer forming transfer rolls 122 and second forming transfer rolls 126; wherein, the plurality of pairs of second outer The number of sets of the forming transfer roller 122 and the second forming transfer roller 126 is 40 sets, the distance is 120 mm, and the rotation speed is 800 mm/min.

d. Roll the edge height of the steel strip processed in step c to 1.8 times the radius of the welded pipe to be prepared by multiple pairs of third external forming transfer rolls 132 and rigid support rods 173 to obtain a tube blank; multiple pairs of third forming transfer rolls The number of sets is 40 sets, the spacing is 120mm, and the speed is 800mm/min.

e. Fix the steel strip obtained after the treatment in step d by fixing the tube hole block, and perform laser welding on the tube blank under the protective gas. The laser power is 1050W, and the welding speed is 12.5m/min. Wherein, the direction of the shielding gas and the direction of the laser beam form an included angle of 45°. The shielding gas is argon.

Example 6

a. Surface pickling, cold rolling and annealing are carried out to the steel strip 2; the annealing temperature is 882° C., the annealing time is 5.9 hours, and the thickness of the steel strip after cold rolling is 0.9 mm;

b. The pretreated steel strip is transported to the platform, and the height of the edge of the steel strip is rolled to 0.98 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117; Wherein, the number of sets of the plurality of pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117 is 55 sets, the distance is 110 mm, and the rotation speed is 520 mm/min.

c. Roll the edge height of the steel strip processed in step b to 1.35 times the radius of the welded pipe to be prepared by multiple pairs of second outer forming transfer rolls 122 and second forming transfer rolls 126; wherein, the plurality of pairs of second outer The number of sets of the forming transfer roller 122 and the second forming transfer roller 126 is 55 sets, the distance is 110 mm, and the rotation speed is 520 mm/min.

d. Roll the edge height of the steel strip processed in step c to 1.8 times the radius of the welded pipe to be prepared by multiple pairs of third external forming transfer rolls 132 and rigid support rods 173 to obtain a tube blank; multiple pairs of third forming transfer rolls The number of sets is 55 sets, the spacing is 110mm, and the speed is 520mm/min.

e. Fix the steel strip obtained after the treatment in step d by fixing the tube hole block, and perform laser welding on the tube blank under the protective gas. The laser power is 1050W, and the welding speed is 13.2m/min. Wherein, the direction of the shielding gas is coaxial with the direction of the laser beam. The shielding gas is argon.

Example 7

a. Surface pickling, cold rolling and annealing are carried out to the steel strip 2; the annealing temperature is 878° C., the annealing time is 5.8 hours, and the thickness of the steel strip after cold rolling is a steel strip with a thickness of 0.75 mm;

b. The pretreated steel strip is transported to the platform, and the height of the edge of the steel strip is rolled to 0.93 times the radius of the welded pipe to be prepared by multiple pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117; Wherein, the number of sets of the plurality of pairs of first outer forming transfer rolls 112 and first inner forming transfer rolls 117 is 45 sets, the distance is 85 mm, and the rotation speed is 450 mm/min.

c. Roll the edge height of the steel strip processed in step b to 1.25 times the radius of the welded pipe to be prepared by multiple pairs of second outer forming transfer rollers 122 and second forming transfer rollers 126; wherein, the plurality of pairs of second outer The number of sets of the forming transfer roller 122 and the second forming transfer roller 126 is 45 sets, the distance is 85 mm, and the rotation speed is 450 mm/min.

d. Roll the edge height of the steel strip processed in step c to 1.95 times the radius of the welded pipe to be prepared by multiple pairs of third external forming transfer rolls 132 and rigid support rods 173 to obtain a tube blank; multiple pairs of third forming transfer rolls The number of sets is 45 sets, the spacing is 85mm, and the speed is 450mm/min.

e. Fix the steel strip obtained after the treatment in step d by fixing the tube hole block, and perform laser welding on the tube blank under the protective gas. The laser power is 995W, and the welding speed is 13.3m/min. Wherein, the direction of the shielding gas is coaxial with the direction of the laser beam. The shielding gas is argon.

data analysis

1. Appearance inspection

The welded steel pipes obtained in Examples 1-7 and the ordinary steel pipes welded by argon arc welding were inspected for appearance, and the obtained data are shown in Table 1.

Table I

Exterior Example 1 Well formed welds Example 2 Well formed welds Example 3 Well formed welds Example 4 Well formed welds Example 5 Well formed welds Example 6 Well formed welds Example 7 Well formed welds Ordinary steel pipe Well formed welds

It can be seen from Table 1 that the welded seam formation of the steel pipes welded by Examples 1-7 and the common steel pipes are all good. 2. Appearance inspection

Tensile tests were carried out on the welded steel pipes obtained in Examples 1-7 and ordinary steel pipes welded by argon arc welding. The test was based on the standard GB/T 228-2002 "Metallic Materials Tensile Test Method at Room Temperature".

Table II

Fracture location Example 1 Fracture at base metal Example 2 Fracture at base metal Example 3 Fracture at base metal Example 4 Fracture at base metal Example 5 Fracture at base metal Example 6 Fracture at base metal Example 7 Fracture at base metal Ordinary steel pipe Weld fracture

It can be seen from Table 2 that the steel pipes prepared in Examples 1-7 have good tensile properties.

3. Metallographic organization

The metallographic structures of the welded steel pipes obtained in Examples 1-7 and ordinary steel pipes welded by argon arc welding were detected.

Table II

Exterior Example 1 Strip deformed austenite, and close to the base metal, there is no weak zone Example 2 Strip deformed austenite, and close to the base metal, there is no weak zone Example 3 Strip deformed austenite, and close to the base metal, there is no weak zone Example 4 Strip deformed austenite, and close to the base metal, there is no weak zone Example 5 Strip deformed austenite, and close to the base metal, there is no weak zone Example 6 Strip deformed austenite, and close to the base metal, there is no weak zone Example 7 Strip deformed austenite, and close to the base metal, there is no weak zone Ordinary steel pipe The heat-affected zone has a large width and there is a weak zone

It can be seen from Table 3 that the steel pipes prepared in Examples 1-7 have a good metallographic structure.

As mentioned above, the present invention is a method for eliminating jumping and misalignment of laser-welded thin tubes and guaranteeing gaps, which can effectively eliminate the jumping and misalignment of pipelines and guarantee gaps when laser welding thin tubes, and improve the qualified rate of products; through this method The diameter of the produced pipe directly meets the production requirements, canceling the production link of welded pipe sizing, and improving the productivity.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (10)

1. a kind of laser that eliminates is welded the bounce of light wall pipe pipeline, misalignment and ensures the device in gap, including：Successively tactic One pipe winding mechanism, the second pipe winding mechanism, the 3rd pipe winding mechanism and welding clamping device；Steel plate pass sequentially through the first pipe winding mechanism, Second pipe winding mechanism, the 3rd pipe winding mechanism and welding clamping device；

First pipe winding mechanism includes：

Platform and it is fixed on platform entablature；

Shaping transmission roll outside multipair first, which is rotatably vertically arranged on platform, shaping transmission outside each pair first Spacing is provided between roll；

Shaping transmission roll inside first, which is can be rotatably set on the crossbeam, and is located at shaping biography outside each pair first Send between roll, formed with pressing steel plate between shaping transmission roll inside shaping transmission roll and first outside described first The gap of arc；

Wherein, the outline of transmission roll is shaped by the first globoidal structure and the first globoidal structure phase outside described first The planar structure composition cut；Inside first, outside the outline and described first of shaping transmission roll, shaping transmits the foreign steamer of roll Exterior feature matches.

2. the laser that eliminates according to claim 1 is welded the bounce of light wall pipe pipeline, misalignment and ensures the device in gap, its feature It is that second pipe winding mechanism includes：

Shaping transmission roll outside multipair second, which is rotatably vertically arranged on platform, shaping transmission outside each pair second It is close to each other between roll；Outside second, the outline of shaping transmission roll is provided with the second globoidal structure；

Shaping transmission roll inside second, its its can be rotatably set on the crossbeam, and be located at outside each pair second into Between shape transmission roll；Roll at least provided with shaping transmission inside five described second between shaping transmission roll outside each pair second Roller.

3. the laser that eliminates according to claim 1 is welded the bounce of light wall pipe pipeline, misalignment and ensures the device in gap, its feature It is that the 3rd pipe winding mechanism includes：

Shaping transmission roll outside multipair 3rd, which is rotatably vertically arranged on platform, shaping transmission outside each pair the 3rd Spacing is provided between roll；

Rigid pressure pin, which passes through pressure pin support bar and is arranged on outside the multipair 3rd between shaping transmission roll；

Wherein, the outline for transmission roll being shaped outside the described 3rd is provided with the 3rd globoidal structure；The rigid pressure pin is half Cylinder, is provided with multipair axially distributed ground pressure pin wheel roller, the rigid pressure pin and the 3rd arc on the rigid pressure pin Face structure matches.

4. the laser that eliminates according to claim 1 is welded the bounce of light wall pipe pipeline, misalignment and ensures the device in gap, its feature It is that the welding clamping device includes

Fixed pore block, which is erected on platform, inside the fixed pore block is provided with cavity；

A pair the 4th transfer rollers, which is can be rotatably set in the cavity, is cooperated for solid in the 4th transfer roller Fixed and transmission steel pipe；

Wherein, the outline of the 4th transfer roller is provided with the 4th globoidal structure.

5. it is a kind of to eliminate the method that laser is welded the bounce of light wall pipe pipeline, misalignment and ensures gap, it is characterised in that to include：

A, steel band is delivered on platform, first passes through outside multipair first shaping transmission roll inside shaping transmission roll and first By the height of steel band edge roll up to 0.9～1.0 times of welded tube radius need to be prepared；

B, outside multipair second shaping transmission roll and the second shaping transmission roll by the Edge of Steel Strip after the process of step a Edge is highly rolled up to need to prepare 1.0～1.6 times of welded tube radius；

C, the steel band edge after the process of step b is highly rolled up by shaping transmission roll and rigid pressure pin outside the multipair 3rd 1.6～2.0 times of welded tube radius need to be extremely prepared, pipe is obtained；

D, the pipe obtained after the process of step c is fixed by fixed pore block, under a shielding gas pipe is swashed Photocoagulation.

6. it is according to claim 5 to eliminate the method that laser is welded the bounce of light wall pipe pipeline, misalignment and ensures gap, its feature It is also to include：Carry out pretreatment before step a to steel pipe, the pretreatment includes carrying out steel band surface acid-washing, cold rolling And annealing.

7. it is according to claim 6 to eliminate the method that laser is welded the bounce of light wall pipe pipeline, misalignment and ensures gap, its feature It is：The annealing temperature is 875～885 DEG C, and annealing time is 5.5～6.5 hours.

8. it is according to claim 5 to eliminate the method that laser is welded the bounce of light wall pipe pipeline, misalignment and ensures gap, its feature It is：

In step a, outside described multipair first, inside shaping transmission roll and first, the tricks of shaping transmission roll is 5 ～100 sets, 10～200mm of spacing, rotating speed are 10～1000mm/min；

In step b, outside described multipair second, inside shaping transmission roll and second, the tricks of shaping transmission roll is 5 ～100 sets, 10～200mm of spacing, rotating speed are 10～1000mm/min；

In step c, multipair 3rd shaping transmission roll tricks is 5～100 sets, 10～200mm of spacing, rotating speed for 10～ 1000mm/min。

9. it is according to claim 5 to eliminate the method that laser is welded the bounce of light wall pipe pipeline, misalignment and ensures gap, its feature It is：The laser power is 900～1100W, and speed of welding is 12～14m/min；The direction of the protective gas and laser The direction of beam is coaxial.

10. according to claim 5 to eliminate the method that laser is welded the bounce of light wall pipe pipeline, misalignment and ensures gap, which is special Levy and be：After cold rolling, the thickness of the steel band is 0.5～1.5mm.