CN210334708U - Welding structure formed by single-side welding and double-side forming welding suitable for transverse welding position - Google Patents
Welding structure formed by single-side welding and double-side forming welding suitable for transverse welding position Download PDFInfo
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Abstract
The utility model provides a welding structure that two-sided shaping welding of single face welding formed suitable for horizontal position of welding, vertical contact between upper end mother metal and the lower extreme mother metal, form the horizontal welding groove between upper end mother metal and the lower extreme mother metal, adopt automatic argon arc welding mode to weld at welding groove bottom and form the backing weld layer, adopt automatic argon arc welding mode to weld on the backing weld layer and form the filler layer, the filler layer fills up whole welding groove, adopt automatic argon arc welding mode to weld on the top edge of filler layer and welding groove and form the capping layer. The utility model discloses can realize the two-sided shaping of single face welding, obtain good welding seam quality, improve the shaping of welding seam outward appearance, improve production efficiency, the artifical intensity of labour that has significantly reduced proposes the welding bead simultaneously and polishes and the requirement of detecting a flaw, has reduced the welding defect that the human factor leads to.
Description
Technical Field
The utility model relates to a welded structure that two-sided shaping welding of single face welding formed suitable for horizontal welding position.
Background
With the development of the nuclear power industry, the small reactor is rapidly developed by virtue of the advantages of small initial investment, short construction period, strong mobility and the like, and the power supply problem of the area where the power grid is difficult to extend, such as islands with development value, offshore drilling platforms, dead zones with high difficulty of power grid engineering and the like, can be effectively solved. The overall size of the small reactor is much smaller than that of large nuclear power equipment, and the wall thickness is relatively thinner and less than or equal to 100mm, so that most of the parent metal of the reactor vessel body adopts nickel-based alloy or low-alloy steel. When the reactor shell is welded in a girth mode, due to structural design reasons and narrow internal space, the inner wall cannot be welded, the welding seam can only be welded from the outer wall, and single-side welding and double-side forming are guaranteed. The circular seam of the shell can be welded by vertical horizontal welding or horizontal welding.
For most manufacturing plants at home and abroad, for the circular seam vertical transverse welding and single-side welding and double-side forming of the nickel-based alloy shell, manual argon arc welding is mostly adopted, the manual welding has low production efficiency, the labor intensity of a welder is high, and welding defects can be caused due to human factors after long-time operation in the environment of high-temperature baking and toxic smoke dust.
SUMMERY OF THE UTILITY MODEL
The utility model provides a welding structure that two-sided shaping welding of single face welding formed suitable for horizontal welding position can realize the two-sided shaping of single face welding, obtains good welding seam quality, improves welding seam outward appearance shaping, improves production efficiency, and the artifical intensity of labour that has significantly reduced proposes the welding bead simultaneously and polishes and the requirement of detecting a flaw, has reduced the welding defect that the human factor leads to.
In order to achieve the above object, the utility model provides a welding structure that two-sided shaping welding of single face welding formed suitable for horizontal position of welding contains:
a transverse welding groove formed between the upper end base metal and the lower end base metal, the transverse welding groove having a bottom located at the inner end of the base metal, an upper end base metal groove side wall located at the upper end base metal side, a lower end base metal groove side wall located at the lower end base metal side, and a top located at the outer end of the base metal;
a backing weld layer which is positioned at the bottom of the welding groove and completely fuses the truncated edge of the upper end base metal and the truncated edge of the lower end base metal together to completely cover the gap between the upper end base metal and the lower end base metal;
the welding groove is filled with a plurality of filling welding layers, the first filling welding layer is positioned on the bottoming welding layer, the second filling welding layer is positioned on the first filling welding layer, and the rest is done in the same way, and the last filling welding layer is positioned on the penultimate filling welding layer;
and the cover surface welding layer is positioned on the filling welding layer and at the joint of the filling welding layer and the base metal, and completely covers the top edge of the welding groove.
The upper end parent metal groove side wall comprises: the angle between the upper groove and the horizontal plane is 7-15 degrees, the angle between the lower groove and the vertical plane is 30-50 degrees, the radius of a transition fillet between the upper groove and the lower groove is 2-8 mm, and the distance from the straight joint of the upper groove and the lower groove to the inner side surface of the upper parent metal is 6-10 mm.
The lower end parent metal groove side wall comprises: the angle between the upper groove and the horizontal plane is 3-10 degrees, the angle between the lower groove and the vertical plane is 30-50 degrees, the radius of a transition fillet between the upper groove and the lower groove is 2-8 mm, and the distance from the straight joint of the upper groove and the lower groove to the inner side surface of the lower-end base metal is 6-10 mm.
Each layer of filling welding layer at least comprises two filling welding beads, the number of the filling welding beads contained in each layer of filling welding layer is related to the width of a welding groove where the layer of filling welding layer is located, and the wider the width of the welding groove, the more the number of the required filling welding beads is.
When the filling welding layer comprises two filling welding beads and the filling welding layer is a first filling welding layer, the first filling welding bead is positioned on the edge of the base material at the lower end and the bottoming welding layer, and the second filling welding bead is positioned on the edge of the base material at the upper end, the first filling welding bead and the bottoming welding layer;
when the filling welding layer comprises two filling welding beads and the filling welding layer is not the first filling welding layer, the first filling welding bead is positioned on the edge of the lower end base metal and the upper layer of filling welding layer, and the second filling welding bead is positioned on the edge of the upper end base metal, the first filling welding bead and the upper layer of filling welding layer;
when the filling weld layer comprises three filling weld beads, a first filling weld bead is positioned on the edge of the lower end base metal and the upper layer of filling weld layer, a second filling weld bead is positioned on the edge of the upper end base metal and the upper layer of filling weld layer, and a third filling weld bead is positioned on the first filling weld bead, the second filling weld bead and the upper layer of filling weld layer;
when the filling welding layer comprises n filling welding beads, n is more than or equal to 4, the first filling welding bead is positioned on the edge of the lower end base metal and the upper layer of filling welding layer, the second filling welding bead-the (n-2) th filling welding bead are positioned on the upper filling welding bead and the upper layer of filling welding layer, the (n-1) th filling welding bead is positioned on the edge of the upper end base metal and the upper layer of filling welding layer, and the (n-1) th filling welding bead is positioned on the (n-2) th filling welding bead, the (n-1) th filling welding bead and the upper layer of filling welding layer.
The cover surface welding layer comprises n cover surface welding beads, n is larger than or equal to 4, the first cover surface welding bead is positioned at the joint of the lower end base metal and the last layer of filling welding layer and on the last layer of filling welding layer, the second cover surface welding bead-the (n-2) th cover surface welding bead are positioned on the upper cover surface welding bead and the last layer of filling welding layer, the (n-1) th cover surface welding bead is positioned at the joint of the upper end base metal and the last layer of filling welding layer and on the last layer of filling welding layer, and the nth cover surface welding bead is positioned on the (n-2) th cover surface welding bead, the (n-1) th cover surface welding bead and the last layer of filling welding layer.
The utility model discloses an automatic argon arc welds horizontal welding, can realize the two-sided shaping of single face welding, obtains good welding seam quality, improves the shaping of welding seam outward appearance, improves production efficiency, and the artifical intensity of labour that has significantly reduced proposes the welding bead simultaneously and polishes and the requirement of detecting a flaw, has reduced the welding defect that the human factor leads to.
Drawings
Fig. 1 is a welding flow chart of the welding structure provided by the present invention.
Fig. 2 is a schematic view of a welding groove.
Fig. 3 is an enlarged schematic view of a portion I in fig. 2.
Fig. 4 is a welding schematic of a backing weld.
Fig. 5 is a weld diagram of a fill weld.
Fig. 6 is a weld schematic of a capstock weld.
Fig. 7 is a schematic view of a welding structure provided by the present invention.
Detailed Description
The preferred embodiment of the present invention will be described in detail below with reference to fig. 1 to 7.
As shown in fig. 1, the utility model provides a welding structure that two-sided shaping welding of single face welding formed suitable for horizontal welding position, this welding structure's welding method contains following step:
step S1, assembling an upper end base metal and a lower end base metal to be welded, wherein the upper end base metal and the lower end base metal are in vertical contact, and a transverse welding groove is formed between the upper end base metal and the lower end base metal;
step S2, welding the bottom of the welding groove by adopting an automatic argon arc welding mode to form a backing weld layer;
step S3, welding the backing welding layer by adopting an automatic argon arc welding mode to form a filling welding layer, and filling the whole welding groove with the filling welding layer;
and step S4, welding the filling welding layer and the joint of the filling welding layer and the base metal by adopting an automatic argon arc welding mode to form a cover surface welding layer.
The utility model discloses mainly weld to nickel base alloy, also can weld stainless steel material, if upper end mother metal and lower extreme mother metal are nickel base alloy, adopt nickel base alloy to weld as the solder so, if upper end mother metal and lower extreme mother metal are stainless steel, then adopt the stainless steel to weld as the solder so.
As shown in fig. 2, the upper end base material and the lower end base material are vertically arranged, the upper end base material (test piece a) is arranged on the lower end base material (test piece B), the wall thickness L of the test piece a and the wall thickness L of the test piece B are less than or equal to 100mm, and welding is performed from the outer sides of the test piece a and the test piece B.
The test piece A is provided with a bottom groove, the bottom groove comprises an upper groove 101, a lower groove 102 and a truncated edge 103, the upper groove 101 is connected with the outer side face of the test piece A and the lower groove 102, an angle α between the upper groove 101 and the horizontal plane is 7-15 degrees, the lower groove 102 is connected with the upper groove 101 and the truncated edge 103, an angle gamma 2 between the lower groove 102 and the vertical plane is 30-50 degrees, as shown in figure 3, a transition fillet is arranged between the upper groove 101 and the lower groove 102, the radius R of the transition fillet is 2-8 mm, the distance h from the straight joint of the upper groove 101 and the lower groove 102 to the inner side face of the test piece A is 6-10 mm, the truncated edge 103 is connected with the lower groove 102 and the inner side face of the test piece A, and the height delta of the truncated edge 103 is 1-2 mm.
The test piece B also comprises a bottom groove, the bottom groove comprises an upper groove 201, a lower groove 202 and a blunt edge 203, the upper groove 201 is connected with the outer side face and the lower groove 202 of the test piece B, an angle β between the upper groove 201 and the horizontal plane is 3-10 degrees, the lower groove 202 is connected with the upper groove 201 and the blunt edge 203, an angle gamma 1 between the lower groove 202 and the vertical plane is 30-50 degrees, a transition fillet is arranged between the upper groove 201 and the lower groove 202, the radius of the transition fillet is 2-8 mm, the distance from the straight joint of the upper groove 201 and the lower groove 202 to the inner side face of the test piece B is 6-10 mm, the blunt edge 203 is connected with the lower groove 202 and the inner side face of the test piece B, and the height delta of the blunt edge 203 is 1-2 mm.
Because the test piece A is positioned on the upper side, and the test piece B is positioned on the lower side, the inclination angle α of the upper groove 101 on the test piece A is larger than the inclination angle β of the upper groove 201 on the test piece B, so that the weld metal can be better fused with the upper base metal during welding, and the error variable after assembly is less than or equal to 1.5 mm.
Before welding the welding groove between the upper end base metal and the lower end base metal, necessary preparation before welding is needed, and the preparation comprises the following steps:
cleaning the welding groove and the periphery of the welding groove by adopting alcohol or acetone, and cleaning the surface, the surface to be welded and the edge of the welding groove so that the welding groove has no water stain, oxide, oil stain, slag and other foreign substances which possibly influence the welding quality.
The welding machine head comprises a welding gun and a traveling mechanism, the welding gun comprises a tungsten rod and a wire feeding mechanism, and the adopted tungsten rod has the diameter of
Diameter of welding wire
The current adopts pulse current, the welding machine head walks once along the welding seam of the workpiece according to the set welding procedure, the distances among the welding gun, the tungsten electrode, the wire feeding nozzle and the welding groove are checked, all parts are adjusted to the positions convenient for arc striking, and the stability of electric arc in the welding process is ensured.
As shown in fig. 4, in step S2, the method for forming the base solder layer by welding includes:
adjusting the position of a tungsten rod of a welding gun E to enable the root of the tungsten rod to be 0.5-1.5 mm lower than the center line F of the welding seam;
fixedly mounting a back protection tool C on the inner side surfaces of the upper end base metal A and the lower end base metal B, wherein the back protection tool C can be connected with the upper end base metal A and the lower end base metal B in a welding mode or a bonding mode, the back protection tool C can completely cover a gap between the upper end base metal A and the lower end base metal B and form a closed cavity space Z with the upper end base metal A and the lower end base metal B, before backing welding, introducing pure argon with the purity of 99.99% into the closed cavity space Z, wherein the gas flow is 30-60L/min, and the ventilation time is more than or equal to 15 min;
welding the blunt edge at the bottom of the welding groove by adopting a non-swing automatic argon arc welding straight-in welding mode to form a backing weld bead D, wherein the backing weld bead D completely fuses the blunt edge of the upper end base metal A and the blunt edge of the lower end base metal B together;
visual inspection (VT) and liquid penetration inspection (PT) are performed on the weld joint after backing weld.
Welding parameters of backing welding are shown in table 1, the flow rate of main gas is 15-30L/min, the flow rate of auxiliary gas is 20-50L/min, and the main gas and the auxiliary gas both adopt pure argon gas with the purity of 99.99%;
TABLE 1 backing weld welding parameters
As shown in fig. 5, in step S3, the method for forming the filler layer by welding includes:
adopt automatic argon arc welding of multilayer multichannel not to swing and weld welding mode welding formation multilayer filler weld layer G, until filler weld layer G will weld the groove and fill up, each layer of filler weld layer contains two at least filler weld beads, specifically, welds first layer filler weld layer on backing weld bead D, welds second layer filler weld layer on first layer filler weld layer to analogize with this, welds last layer filler weld layer on penultimate second layer filler weld layer.
When the width of the welding groove can accommodate 2 welding beads, from bottom to top, welding bead 2, welding bead 3, and welding bead 4 and welding bead 5 of the next layer.
When the width of the welding groove can accommodate 3 welding beads, the sequence of the bead arrangement is a-b-c, firstly welding a welding bead a at the edge of the base metal at the lowest side at the lower end, then welding a welding bead b close to the edge of the base metal at the upper side, and finally welding a welding bead c;
when the width of the welding groove can accommodate 4 welding passes, the channel arrangement sequence of the welding passes is d-e-f-g, a side welding pass d of the base material at the lower end is welded firstly, then a welding pass e is welded, the rest space can accommodate two welding passes, a welding pass f close to the edge of the base material at the upper side is welded firstly, and a welding pass g is welded finally;
when the width of the welding groove can accommodate n welding beads, firstly, welding is started from the side of a lower end base metal to the edge of the lower end base metal, a first welding bead is formed by welding on the edge of the lower end base metal and an upper layer of filling welding layer, then welding is sequentially carried out from bottom to top, a second welding bead is formed by welding on the first welding bead and the upper layer of filling welding layer, a third welding bead is formed by welding on the second welding bead and the upper layer of filling welding layer until an n-2 welding bead is formed by welding, the remaining space at the moment can accommodate only two welding beads, welding is started from the side of the upper end base metal to the edge of the upper end base metal, an n-1 welding bead is formed by welding on the edge of the upper end base metal and the upper layer of filling welding layer, and finally, an n-2 welding bead, an n-1 welding bead and an upper layer.
Welding parameters of the filling welding are shown in table 2, wherein the flow rate of the main gas is 15-30L/min, and the flow rate of the auxiliary gas is 20-50L/min;
in the welding process of the filling welding, when the thickness of the welding metal in the welding groove is more than or equal to 5mm, the back protection tool can be removed.
TABLE 2 Filler weld parameters
Each welding pass must be thoroughly cleaned of slag, and the lapping area between the welding passes must be ground and smoothly transited. And polishing the welding joint and the arc pit region smoothly to remove the bad structure, oxide and impurities of the arc pit. And after polishing, residues are cleaned in time, and welding slag fragments cannot be generated.
After each weld pass, the weld was visually inspected (VT) and liquid penetration inspected (PT).
As shown in fig. 6, in step S4, the method for forming the cap layer by welding includes:
welding the filling welding layer G and the joint of the filling welding layer and the base metal by adopting a non-swinging automatic argon arc welding straight-advancing welding mode to form a cover surface welding layer H;
the welding parameters of the cover surface welding are consistent with those of the back welding;
the arrangement sequence of the welding beads is I-II-III-IV-V, as shown in FIG. 6, welding is performed from bottom to top, welding bead I is welded first, then welding bead II and welding bead III are welded in sequence, at this time, two welding beads are accommodated in the residual space, welding bead IV close to the base metal is welded first, and welding bead V is welded finally;
and polishing the surface after welding to meet the flaw detection requirement, and performing liquid penetration inspection (PT), ultrasonic inspection (UT) and ray inspection (RT).
As shown in fig. 7, the utility model provides a welding structure that two-sided shaping welding of single face welding formed suitable for horizontal welding position contains:
a transverse welding bevel 11 formed between the upper base metal and the lower base metal, the transverse welding bevel 11 having a bottom 1011 located at the inner end of the base metal, an upper base metal bevel side wall located at the upper base metal side, a lower base metal bevel side wall located at the lower base metal side, and a top 1012 located at the outer end of the base metal;
a backing weld layer 12 which is positioned at the bottom of the welding groove 11, and completely fuses the truncated edge of the upper end base metal and the truncated edge of the lower end base metal together to completely cover the gap between the upper end base metal and the lower end base metal;
a plurality of filler weld layers 13 which fill the whole welding groove 11, wherein the first filler weld layer is positioned on the backing weld layer, the second filler weld layer is positioned on the first filler weld layer, and so on, and the last filler weld layer is positioned on the penultimate filler weld layer;
and a cover surface welding layer 14 which is positioned on the filler welding layer and at the joint of the filler welding layer and the base metal and completely covers the top edge of the welding groove 11.
Further, as shown in fig. 2 and 7, the groove side wall of the upper end base metal comprises an upper groove 101 and a lower groove 102, an angle α between the upper groove 101 and a horizontal plane is 7-15 degrees, an angle γ 2 between the lower groove 102 and a vertical plane is 30-50 degrees, a radius R of a transition fillet between the upper groove 101 and the lower groove 102 is 2-8 mm, and a distance h from a straight line joint of the upper groove 101 and the lower groove 102 to the inner side surface of the upper end base metal is 6-10 mm.
As shown in fig. 2 and 7, the groove side wall of the lower end base material comprises an upper groove 201 and a lower groove 202, an angle β between the upper groove 201 and a horizontal plane is 3-10 degrees, an angle γ 1 between the lower groove 202 and a vertical plane is 30-50 degrees, a radius R of a transition fillet between the upper groove 201 and the lower groove 202 is 2-8 mm, and a distance h between a straight line joint of the upper groove 201 and the lower groove 202 and the inner side surface of the lower end base material is 6-10 mm.
As shown in fig. 7, each of the filler layers 13 includes at least two welding passes, and each of the filler layers includes a number of welding passes related to a width of the welding groove in which the filler layer is located, and the wider the width of the welding groove, the greater the number of welding passes required.
When the filler weld layer includes two weld beads and the filler weld layer is the first filler weld layer, as shown in fig. 7, the first weld bead 2 is located on the edge of the lower end base metal and the underlying weld layer 1, and the second weld bead 3 is located on the edge of the upper end base metal, the first weld bead 2 and the underlying weld layer 1.
When the filler weld layer includes two weld beads and the filler weld layer is not the first filler weld layer, as shown in fig. 7, the first weld bead 4 is located on the edge of the lower end base material and the upper filler weld layer, and the second weld bead 5 is located on the edge of the upper end base material, the first weld bead 4 and the upper filler weld layer.
When the filler weld layer includes three weld beads, as shown in fig. 7, a first weld bead a is positioned on the edge of the lower end base metal and the upper filler weld layer, a second weld bead b is positioned on the edge of the upper end base metal and the upper filler weld layer, and a third weld bead c is positioned on the first weld bead a, the second weld bead b and the upper filler weld layer.
When the filling welding layer comprises four welding beads, a first welding bead d is positioned on the edge of the lower end base metal and the upper filling welding layer, a second welding bead e is positioned on the first welding bead d and the upper filling welding layer, a third welding bead f is positioned on the edge of the upper end base metal and the upper filling welding layer, and a fourth welding bead g is positioned on the second welding bead e, the third welding bead f and the upper filling welding layer.
When the filling welding layer comprises n (n >4) welding beads, the first welding bead is positioned on the edge of the lower end base metal and the upper layer of the filling welding layer, the second welding bead-the (n-2) welding bead are positioned on the upper welding bead and the upper layer of the filling welding layer, the (n-1) welding bead is positioned on the edge of the upper end base metal and the upper layer of the filling welding layer, and the (n-2) welding bead, the (n-1) welding bead and the upper layer of the filling welding layer.
As shown in fig. 7, the cap layer includes: and at least four welding passes, taking n (n >4) welding passes as an example, the first welding pass is positioned at the joint of the lower end base metal and the last filling welding layer and on the last filling welding layer, the second welding pass to the n-2 welding pass are positioned on the upper welding pass and the last filling welding layer, the n-1 welding pass is positioned at the joint of the upper end base metal and the last filling welding layer and on the last filling welding layer, and the n welding pass is positioned on the n-2 welding pass, the n-1 welding pass and the last filling welding layer.
The utility model discloses an automatic argon arc welds horizontal welding, can realize the two-sided shaping of single face welding, obtains good welding seam quality, improves the shaping of welding seam outward appearance, improves production efficiency, and the artifical intensity of labour that has significantly reduced proposes the welding bead simultaneously and polishes and the requirement of detecting a flaw, has reduced the welding defect that the human factor leads to.
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (6)
1. A welded structure formed by single-side welding and double-side forming welding suitable for a transverse welding position is characterized by comprising:
a transverse welding groove formed between the upper end base metal and the lower end base metal, the transverse welding groove having a bottom located at the inner end of the base metal, an upper end base metal groove side wall located at the upper end base metal side, a lower end base metal groove side wall located at the lower end base metal side, and a top located at the outer end of the base metal;
a backing weld layer which is positioned at the bottom of the welding groove and completely fuses the truncated edge of the upper end base metal and the truncated edge of the lower end base metal together to completely cover the gap between the upper end base metal and the lower end base metal;
the welding groove is filled with a plurality of filling welding layers, the first filling welding layer is positioned on the bottoming welding layer, the second filling welding layer is positioned on the first filling welding layer, and the rest is done in the same way, and the last filling welding layer is positioned on the penultimate filling welding layer;
and the cover surface welding layer is positioned on the filling welding layer and at the joint of the filling welding layer and the base metal, and completely covers the top edge of the welding groove.
2. The welded structure of claim 1, wherein said upper parent metal groove side wall comprises: the angle between the upper groove and the horizontal plane is 7-15 degrees, the angle between the lower groove and the vertical plane is 30-50 degrees, the radius of a transition fillet between the upper groove and the lower groove is 2-8 mm, and the distance from the straight joint of the upper groove and the lower groove to the inner side surface of the upper parent metal is 6-10 mm.
3. The welded structure according to claim 1, wherein said lower parent metal groove side wall comprises: the angle between the upper groove and the horizontal plane is 3-10 degrees, the angle between the lower groove and the vertical plane is 30-50 degrees, the radius of a transition fillet between the upper groove and the lower groove is 2-8 mm, and the distance from the straight joint of the upper groove and the lower groove to the inner side surface of the lower-end base metal is 6-10 mm.
4. The welding structure of claim 1, wherein each filler pass comprises at least two filler passes, and each filler pass comprises a number of filler passes related to a width of a welding groove in which the filler pass is located, and the wider the width of the welding groove, the greater the number of filler passes required.
5. The welding structure of claim 4, wherein when the filler weld layer comprises two filler beads and the filler weld layer is a first filler weld layer, a first filler bead is located on the lower base material edge and the backing weld layer, and a second filler bead is located on the upper base material edge, the first filler bead and the backing weld layer;
when the filling welding layer comprises two filling welding beads and the filling welding layer is not the first filling welding layer, the first filling welding bead is positioned on the edge of the lower end base metal and the upper layer of filling welding layer, and the second filling welding bead is positioned on the edge of the upper end base metal, the first filling welding bead and the upper layer of filling welding layer;
when the filling weld layer comprises three filling weld beads, a first filling weld bead is positioned on the edge of the lower end base metal and the upper layer of filling weld layer, a second filling weld bead is positioned on the edge of the upper end base metal and the upper layer of filling weld layer, and a third filling weld bead is positioned on the first filling weld bead, the second filling weld bead and the upper layer of filling weld layer;
when the filling welding layer comprises n filling welding beads, n is more than or equal to 4, the first filling welding bead is positioned on the edge of the lower end base metal and the upper layer of filling welding layer, the second filling welding bead-the (n-2) th filling welding bead are positioned on the upper filling welding bead and the upper layer of filling welding layer, the (n-1) th filling welding bead is positioned on the edge of the upper end base metal and the upper layer of filling welding layer, and the (n-1) th filling welding bead is positioned on the (n-2) th filling welding bead, the (n-1) th filling welding bead and the upper layer of filling welding layer.
6. The welding structure of claim 1, wherein said cap weld comprises n cap welds, n is 4 or more, the first cap weld is located at the junction of the lower base metal and the last filler weld and on the last filler weld, the second to the (n-2) th cap welds are located on the upper cap weld and the last filler weld, the (n-1) th cap weld is located at the junction of the upper base metal and the last filler weld and on the last filler weld, and the (n-2) th cap weld is located on the (n-2) th cap weld, the (n-1) th cap weld and the last filler weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740828.9U CN210334708U (en) | 2019-05-22 | 2019-05-22 | Welding structure formed by single-side welding and double-side forming welding suitable for transverse welding position |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740828.9U CN210334708U (en) | 2019-05-22 | 2019-05-22 | Welding structure formed by single-side welding and double-side forming welding suitable for transverse welding position |
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| Publication Number | Publication Date |
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| CN210334708U true CN210334708U (en) | 2020-04-17 |
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| CN201920740828.9U Active CN210334708U (en) | 2019-05-22 | 2019-05-22 | Welding structure formed by single-side welding and double-side forming welding suitable for transverse welding position |
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2019
- 2019-05-22 CN CN201920740828.9U patent/CN210334708U/en active Active
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