CN204565440U - Groove docking Welding Structure - Google Patents
Groove docking Welding Structure Download PDFInfo
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- CN204565440U CN204565440U CN201520206374.9U CN201520206374U CN204565440U CN 204565440 U CN204565440 U CN 204565440U CN 201520206374 U CN201520206374 U CN 201520206374U CN 204565440 U CN204565440 U CN 204565440U
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Abstract
The utility model provides a kind of groove to dock Welding Structure, and this Welding Structure comprises: be formed at the madial wall of connector joint and the first groove of lateral wall and the second groove; Between first groove and the second groove, interval is arranged, and forms a root face in the junction of two connectors; The bottom centre of the first groove is provided with the first root pass, and the first root pass is provided with the first weld seam layer of full first groove of weldering; The bottom centre of the second groove is provided with the second root pass, and the second root pass is provided with the second weld seam layer of full second groove of weldering.Welding material size, welding parameter and the welding sequence etc. of the utility model by improving, complete the welding of whole abutment joint, thus ensure the welding quality of butt weld, and decrease the nondestructive inspection (NDI) after middle back chipping and back chipping, visual examination and dimensional gaughing operation, shorten manufacturing cycle, improve production efficiency.
Description
Technical field
The utility model relates to a kind of solder technology being applied to nuclear power or chemical field, is specifically related to a kind of groove docking Welding Structure.
Background technology
In nuclear power generating equipment and pressure vessels for the chemical industry field, general girth welding between low-alloy steel housing and housing all adopts inwall manual electric arc welding, the welding procedure of Lincoln weld again after outer wall back chipping; And adapter welds with the weld seam between housing the welding procedure all adopting two-sided Lincoln weld, after the welding of side, opposite side back chipping then welds again.All need back chipping step in these butt seam welding termination process, namely need to remove root face and root pass, and the magnetic particle inspection needing after back chipping to carry out in nondestructive inspection is to guarantee that back chipping is thorough, also needs afterwards to carry out visual examination and dimensional gaughing.Because back chipping process and nondestructive inspection need the expensive time, even there will be back chipping and thoroughly do not cause the generation of weld defect.
Utility model content
The utility model discloses a kind of groove docking Welding Structure, decreases the nondestructive inspection (NDI) after middle back chipping operation and back chipping, visual examination and dimensional gaughing operation, shortens manufacturing cycle, improve production efficiency.
For achieving the above object, the utility model provides a kind of groove to dock Welding Structure, this Welding Structure is arranged between the connector of two docking, be characterized in, this Welding Structure comprises: the first groove and the second groove that are formed at connector joint, and this first groove and the second groove lay respectively at madial wall and the lateral wall of connector; Between first groove and the second groove, interval is arranged, and forms a root face in the junction of two connectors, and two connectors fit tightly at root face place;
The bottom centre of above-mentioned first groove is provided with the first root pass, and the first root pass is provided with the first weld seam layer of full first groove of weldering;
The bottom centre of above-mentioned second groove is provided with the second root pass, and the second root pass is provided with the second weld seam layer of full second groove of weldering.
Two docking above-mentioned connectors be: two docking low-alloy steel housings, or docking low-alloy steel housing and low-alloy steel take over.
The length of above-mentioned root face is less than or equal to 3 millimeters.
In the above-mentioned low-alloy steel housing of two docking, the first groove and the second groove are double U-groove or UV type groove.
During the above-mentioned low-alloy steel housing of docking and low-alloy steel are taken over, the first groove and the second groove are double U-groove.
The above-mentioned low-alloy steel housing of docking and low-alloy steel are also provided with middle welding bead in taking between the first root pass and the first weld seam layer.
The thickness summation of above-mentioned middle welding bead and the first root pass is more than or equal to 10 millimeters.
Above-mentioned first root pass and the second root pass cover the intersection of root face two ends and the first groove and the second groove respectively completely.
The interior outside of docking weld arranges the first groove and the second groove respectively; Maximum weld electric current and maximum weld voltage complete penetraction and fusion in welding root pass and root face is adopted, welding formation first root pass, then full whole first groove of weldering in the bottom centre of the first groove; After first groove welding completes, first clear up the groove face of the second groove, the bottom centre being welded on the second groove carrying out the second groove again adopts maximum weld electric current and maximum weld voltage through welding root pass and root face, form the second root pass, be sewn on again on the first root pass and form welding bead in the middle of one deck, then full whole second groove of weldering.
The utility model groove docking Welding Structure and welding method are compared with the solder technology of prior art, its advantage is, the utility model successively welds the groove of junction madial wall and lateral wall between two low-alloy steel housings or between low-alloy steel housing and low-alloy steel pipeline, root pass and root face is melted completely by big current in groove bottom centre, and the length reducing root face is to realize complete penetraction and fusion in welding, by the welding material size improved, welding parameter and welding sequence etc., complete the welding of whole abutment joint, decrease the nondestructive inspection (NDI) after middle back chipping and back chipping, visual examination and dimensional gaughing operation, shorten manufacturing cycle, improve production efficiency, and ensure the welding quality of butt weld.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model groove docks welded embodiment one;
Fig. 2 is the structural representation that the utility model groove docks welded embodiment two;
Fig. 3 is the structural representation that the utility model groove docks welded embodiment three;
Fig. 4 is the structural representation that the utility model groove docks welded embodiment four.
Detailed description of the invention
Below in conjunction with accompanying drawing, further illustrate specific embodiment of the utility model.
The utility model provides a kind of solder technology of not back chipping, the welding material size improved and welding parameter, complete the welding of whole abutment joint, thus ensure the welding quality of butt weld, and decrease the nondestructive inspection (NDI) after middle back chipping and back chipping, visual examination and dimensional gaughing operation, shorten manufacturing cycle, improve production efficiency.
As shown in Figure 1, for groove docks welded embodiment one, this Welding Structure is arranged between the low-alloy steel housing of two docking, this Welding Structure comprises: the first groove 101 and the second groove 102 being formed at joint between low-alloy steel housing, madial wall 108, second groove 102 that this first groove 101 is positioned at low-alloy steel housing is positioned at the lateral wall 109 of low-alloy steel housing.First groove 101 is corresponding with the second groove 102 to be arranged, and the axial connecting line of the first groove 101 and the second groove 102 is perpendicular to the surface of low-alloy steel housing.Here, the first groove 101 and the second groove 102 are double U-groove, and the degree of depth of the second groove 102 is greater than the degree of depth of the first groove 101.
Between first groove 101 and the second groove 102, interval is arranged, the junction of two low-alloy steel housings between the first groove 101 and the second groove 102 is made to form a root face 107, two low-alloy steel housings fit tightly at root face 107 place, the length of this root face 107 is less than or equal to 3 millimeters, preferably, desirable 2 to 3 millimeters.
The bottom centre of the first groove 101 is provided with the first root pass 103, and this first root pass 103 covers the intersection of root face 107 one end and the first groove 101 completely.First root pass 103 is provided with the first weld seam layer 104 covering the first root pass 103 completely, and this first weld seam layer 104 is formed by multi-pass welding, and full first groove 101 of weldering.
The bottom centre of the second groove 102 is provided with the second root pass 105, and this second root pass 105 covers the intersection of root face 107 one end and the second groove 102 completely.Second root pass 105 is provided with the second weld seam layer 106 covering the second root pass 105 completely, and this second weld seam layer 106 is formed by multi-pass welding, and full second groove 102 of weldering.
The welding method that above-mentioned groove docks welded embodiment one comprises following steps:
Step 1.1, the first groove 101 is set at the madial wall 108 of the circumferential weld of low-alloy steel housing, the second groove 102 is set at lateral wall 109.First groove 101 is corresponding with the second groove 102 to be arranged, and the axial connecting line of the first groove 101 and the second groove 102 is perpendicular to the surface of low-alloy steel housing.In the present embodiment one, the first groove 101 and the second groove 102 adopt double U-groove, and wherein the degree of depth of the second groove 102 is greater than the degree of depth of the first groove 101.
After step 1.2, two low-alloy steel housing docking, first be arranged in the first groove 101 of madial wall, adopt the first welding rod of minor diameter to weld first root pass 103 with maximum weld electric current and maximum weld voltage in groove bottom centre, melt the first root pass 103 completely by big current here and root face 107 ensures complete penetraction and fusion in welding.Wherein the diameter of the first welding rod is reduced to diameter by 4 to 5 millimeters of prior art and is less than or equal to 4 millimeters, preferably, and desirable 3 to 4 millimeters of the diameter of welding rod.
Step 1.3, complete the first root pass 103 after, adopt the second other welding rod to carry out multi-pass welding, weld the remainder of the first groove 101, and full whole first groove 101 of weldering, the first root pass 103 is formed the first weld seam layer 104.Here the diameter equidimension of the first welding rod and the second welding rod is unequal, and the diameter of the second welding rod is less than or equal to 4 millimeters, preferably, and desirable 3 to 4 millimeters but inequal with the first welding rod of the diameter of the second welding rod.
Step 1.4, complete the first groove 101 welding after, before the welding of beginning second groove 102, first clear up the groove face of the second groove 102.
Step 1.5, bottom centre at the second groove 102, employing diameter is the welding wire for submerged-arc welding of 4 millimeters, weld second root pass 105, maximum weld electric current and maximum weld voltage is adopted to carry out submerged-arc welding when welding this second root pass 105, the desirable 530A to 630A of concrete welding current, the desirable 20V to 35V of weldingvoltage.
Step 1.6, complete the second root pass 105 after, in the second groove 102, adopt diameter to be that the welding wire for submerged-arc welding of 4 millimeters carries out multi-pass welding, weld the remainder of the second groove 102, and full whole second groove 102 of weldering, the second root pass 105 is formed the second weld seam layer 106.Concrete welding parameter is, the desirable 450A to 630A of welding current, the desirable 20V to 35V of weldingvoltage.
As shown in Figure 2, for groove docks welded embodiment two, this Welding Structure is arranged between the low-alloy steel housing of two docking, this Welding Structure comprises: the first groove 201 and the second groove 202 being formed at joint between low-alloy steel housing, madial wall 208, second groove 202 that this first groove 201 is positioned at low-alloy steel housing is positioned at the lateral wall 209 of low-alloy steel housing.First groove 201 is corresponding with the second groove 202 to be arranged, and the axial connecting line of the first groove 201 and the second groove 202 is perpendicular to the surface of low-alloy steel housing.Here, the first groove 201 and the second groove 202 are UV type groove, and the first groove 201 adopts V-butt, and the second groove 202 adopts U-shaped groove, and the degree of depth of the second groove 202 is greater than the degree of depth of the first groove 201.
Between first groove 201 and the second groove 202, interval is arranged, the junction of two low-alloy steel housings between the first groove 201 and the second groove 202 is made to form a root face 207, two low-alloy steel housings fit tightly at root face 207 place, the length of this root face 207 is less than or equal to 3 millimeters, preferably, desirable 2 to 3 millimeters of the length of root face 207.
The bottom centre of the first groove 201 is provided with the first root pass 203, and this first root pass 203 covers the intersection of root face 207 one end and the first groove 201 completely.First root pass 203 is provided with the first weld seam layer 204 covering the first root pass 203 completely, and this first weld seam layer 204 is formed by multi-pass welding, and full first groove 201 of weldering.
The bottom centre of the second groove 202 is provided with the second root pass 205, and this second root pass 205 covers the intersection of root face 207 one end and the second groove 202 completely.Second root pass 205 is provided with the second weld seam layer 206 covering the second root pass 205 completely, and this second weld seam layer 206 is formed by multi-pass welding, and full second groove 202 of weldering.
The welding method that above-mentioned groove docks welded embodiment two comprises following steps:
Step 2.1, the first groove 201 is set at the madial wall 208 of the circumferential weld of low-alloy steel housing, the second groove 202 is set at lateral wall 209.First groove 201 is corresponding with the second groove 202 to be arranged, and the axial connecting line of the first groove 201 and the second groove 202 is perpendicular to the surface of low-alloy steel housing.In the present embodiment two, the first groove 201 and the second groove 202 adopt UV type groove, and wherein the first groove 201 is double V-groove, and the second groove 202 is U-shaped groove, and the degree of depth of the second groove 202 is greater than the degree of depth of the first groove 201.
After step 2.2, two low-alloy steel housing docking, first be arranged in the first groove 201 of madial wall, adopt the first welding rod of minor diameter to weld first root pass 203 with maximum weld electric current and maximum weld voltage in groove bottom centre, melt the first root pass 203 completely by big current here and root face 207 ensures complete penetraction and fusion in welding.Wherein the diameter of the first welding rod is reduced to diameter by 4 to 5 millimeters of prior art and is less than or equal to 4 millimeters, preferably, and desirable 3 to 4 millimeters of the diameter of welding rod.
Step 2.3, complete the first root pass 203 after, adopt the second welding rod to carry out multi-pass welding, weld the remainder of the first groove 201, and full whole first groove 201 of weldering, the first root pass 203 is formed the first weld seam layer 204.Here the diameter of the second welding rod and the first welding rod is unequal, and the diameter of the second welding rod is less than or equal to 4 millimeters, preferably, and desirable 3 to 4 millimeters but unequal with the first welding rod of the diameter of the second welding rod.
Step 2.4, complete the first groove 201 welding after, before the welding of beginning second groove 202, first clear up the groove face of the second groove 202.
Step 2.5, bottom centre at the second groove 202, employing diameter is the welding wire for submerged-arc welding of 4 millimeters, weld second root pass 205, maximum weld electric current and maximum weld voltage is adopted to carry out submerged-arc welding when welding this second root pass 205, the desirable 530A to 630A of concrete welding current, the desirable 20V to 35V of weldingvoltage.
Step 2.6, complete the second root pass 205 after, in the second groove 202, adopt diameter to be that the welding wire for submerged-arc welding of 4 millimeters carries out multi-pass welding, weld the remainder of the second groove 202, and full whole second groove 202 of weldering, the second root pass 205 is formed the second weld seam layer 206.Concrete welding parameter is, the desirable 450A to 630A of welding current, the desirable 20V to 35V of weldingvoltage.
As shown in Figure 3, for groove docks welded embodiment three, this Welding Structure is arranged between the low-alloy steel housing of docking and low-alloy steel takes over, and this Welding Structure comprises: be formed at low-alloy steel housing and low-alloy steel take between the first groove 306 and the second groove 307 of joint.In the present embodiment, this first groove 306 is positioned at lateral wall 309, second groove 307 that low-alloy steel housing and low-alloy steel takes over and is positioned at the madial wall 310 that low-alloy steel housing and low-alloy steel takes over.First groove 306 is corresponding with the second groove 307 to be arranged, the surface that the axial connecting line of the first groove 306 and the second groove 307 is taken over perpendicular to low-alloy steel housing and low-alloy steel.Here, the first groove 306 and the second groove 307 are double U-groove, and the degree of depth of the second groove 307 is greater than the degree of depth of the first groove 306.
Between first groove 306 and the second groove 307, interval is arranged, make the junction that low-alloy steel housing and low-alloy steel are taken between the first groove 306 and the second groove 307 form a root face 308, low-alloy steel housing and low-alloy steel are taken over and are fitted tightly at root face 308 place.Here, for realizing when melting to guarantee complete penetraction and fusion in welding completely by when big current welding root pass and root face 308, the length of root face 308 is reduced to length range for being less than or equal to 3 millimeters by 7 to 10 millimeters of prior art, preferably, and desirable 2 to 3 millimeters of the length of root face 308.
The bottom centre of the first groove 306 is provided with the first root pass 301, and this first root pass 301 covers the intersection of root face 308 one end and the first groove 306 completely.First root pass 301 is provided with middle welding bead 302, and this middle welding bead 302 covers the first root pass 301 completely, and wherein, the thickness summation of middle welding bead 302 and the first root pass 301 is more than or equal to 10 millimeters.Middle welding bead 302 is provided with the first weld seam layer 303 of welding bead 302 in the middle of covering completely, and this first weld seam layer 303 is formed by multi-pass welding, and full first groove 306 of weldering.
The bottom centre of the second groove 307 is provided with the second root pass 304, and this second root pass 304 covers the intersection of root face 308 one end and the second groove 307 completely.Second root pass 304 is provided with the second weld seam layer 305 covering the second root pass 304 completely, and this second weld seam layer 305 is formed by multi-pass welding, and full second groove 307 of weldering.
The welding method that above-mentioned groove docks welded embodiment three comprises following steps:
Step 3.1, the first groove 306 is set at the lateral wall 309 of low-alloy steel housing and low-alloy steel adapter joint, the second groove 307 is set at madial wall 310.First groove 306 is corresponding with the second groove 307 to be arranged, the surface that the axial connecting line of the first groove 306 and the second groove 307 is taken over perpendicular to low-alloy steel housing and low-alloy steel.In the present embodiment one, the first groove 306 and the second groove 307 adopt double U-groove, and wherein the degree of depth of the second groove 307 is greater than the degree of depth of the first groove 306.
After step 3.2, low-alloy steel housing and low-alloy steel are taken over and are docked, first be arranged in the first groove 306 of lateral wall 309, adopt the first welding rod of minor diameter to weld first root pass 301 with maximum weld electric current and maximum weld voltage in groove bottom centre, melt the first root pass 301 completely by big current here and root face 308 ensures complete penetraction and fusion in welding.Wherein the diameter of the first welding rod is reduced to diameter by 4 to 5 millimeters of prior art and is less than or equal to 4 millimeters, preferably, and desirable 3 to 4 millimeters of the diameter of the first welding rod.
Step 3.3, complete the first root pass 301 after, the welding rod adopting diameter to be less than 4 millimeters carries out multi-pass welding, first welds a part of weld seam of the first groove 306, and the first root pass 301 is formed welding bead 302 in the middle of one deck.This middle welding bead 302 covers the first root pass 301 completely, and wherein, the summation of the first groove 306 and the first root pass 301 thickness is more than or equal to 10 millimeters.
Step 3.4, complete middle welding bead 302 after, adopt the second welding rod and/or welding wire for submerged-arc welding to carry out multi-pass welding, weld the remainder of the first groove 306, and full whole first groove 306 of weldering, middle welding bead 302 is formed the first weld seam layer 303.Here, welding wire for submerged-arc welding diameter is 4 millimeters, and the diameter of the second welding rod is reduced to diameter by 4 to 5 millimeters of prior art and is less than or equal to 4 millimeters, preferably desirable 3 to 4 millimeters, and unequal with the first welding rod.
When adopt welding wire for submerged-arc welding carry out weldering expire whole first groove 306 time, the desirable 450A to 630A of concrete welding current, the desirable 20V to 35V of weldingvoltage.
Step 3.5, complete the first groove 306 welding after, before the welding of beginning second groove 307, first clear up the groove face of the second groove 307.
Step 3.6, bottom centre at the second groove 307, employing diameter is the welding wire for submerged-arc welding of 4 millimeters, weld second root pass 304, maximum weld electric current and maximum weld voltage is adopted when welding this second root pass 304, the desirable 530A to 630A of concrete welding current, the desirable 20V to 35V of weldingvoltage.
Step 3.7, complete the second root pass 304 after, in the second groove 307, adopt diameter to be less than or equal to the welding rod of 4 millimeters and/or diameter is that the welding wire for submerged-arc welding of 4 millimeters carries out multi-pass welding, weld the remainder of the second groove 307, and full whole second groove 307 of weldering, the second root pass 304 is formed the second weld seam layer 305.
When adopt welding wire for submerged-arc welding carry out weldering expire the second groove 307 time, concrete welding parameter is, the desirable 450A to 630A of welding current, the desirable 20V to 35V of weldingvoltage.
As shown in Figure 4, for groove docks welded embodiment four, this Welding Structure is arranged between the low-alloy steel housing of docking and low-alloy steel takes over, and this Welding Structure comprises: be formed at low-alloy steel housing and low-alloy steel take between the first groove 406 and the second groove 407 of joint.In the present embodiment, this first groove 406 is positioned at madial wall 410, second groove 407 that low-alloy steel housing and low-alloy steel takes over and is positioned at the lateral wall 409 that low-alloy steel housing and low-alloy steel takes over.First groove 406 is corresponding with the second groove 407 to be arranged, the surface that the axial connecting line of the first groove 406 and the second groove 407 is taken over perpendicular to low-alloy steel housing and low-alloy steel.Here, the first groove 406 and the second groove 407 are double U-groove, and the degree of depth of the second groove 407 is greater than the degree of depth of the first groove 406.
Between first groove 406 and the second groove 407, interval is arranged, make the junction that low-alloy steel housing and low-alloy steel are taken between the first groove 406 and the second groove 407 form a root face 408, low-alloy steel housing and low-alloy steel are taken over and are fitted tightly at root face 408 place.Here, for realizing when melting to guarantee complete penetraction and fusion in welding completely by when big current welding root pass and root face 408, the length of root face 408 is reduced to length range by 7 to 10 millimeters of prior art and is less than or equal to 3 millimeters, preferably, and desirable 2 to 3 millimeters of the length of root face 408.
The bottom centre of the first groove 406 is provided with the first root pass 401, and this first root pass 401 covers the intersection of root face 408 one end and the first groove 406 completely.First root pass 401 is provided with middle welding bead 402, and this middle welding bead 402 covers the first root pass 401 completely, and wherein, the thickness summation of welding bead 402 and the first root pass 401 is more than or equal to 10 millimeters.Middle welding bead 402 is provided with the first weld seam layer 403 of welding bead 402 in the middle of covering completely, and this first weld seam layer 403 is formed by multi-pass welding, and full first groove 406 of weldering.
The bottom centre of the second groove 407 is provided with the second root pass 404, and this second root pass 404 covers the intersection of root face 408 one end and the second groove 407 completely.Second root pass 404 is provided with the second weld seam layer 405 covering the second root pass 404 completely, and this second weld seam layer 405 is formed by multi-pass welding, and full second groove 407 of weldering.
The welding method that above-mentioned groove docks welded embodiment four comprises following steps:
Step 4.1, the first groove 406 is set at the madial wall 410 of low-alloy steel housing and low-alloy steel adapter joint, the second groove 407 is set at lateral wall 409.First groove 406 is corresponding with the second groove 407 to be arranged, the surface that the axial connecting line of the first groove 406 and the second groove 407 is taken over perpendicular to low-alloy steel housing and low-alloy steel.In the present embodiment two, the first groove 406 and the second groove 407 adopt double U-groove, and wherein the degree of depth of the second groove 407 is greater than the degree of depth of the first groove 406.
After step 4.2, low-alloy steel housing and low-alloy steel are taken over and are docked, first be arranged in the first groove 406 of madial wall 410, adopt the first welding rod of minor diameter to weld first root pass 401 with maximum weld electric current and maximum weld voltage in groove bottom centre, melt the first root pass 401 completely by big current here and root face 408 ensures complete penetraction and fusion in welding.Wherein the diameter of the first welding rod is reduced to diameter by 4 to 5 millimeters of prior art and is less than or equal to 4 millimeters, preferably, and desirable 3 to 4 millimeters of the diameter of the first welding rod.
Step 4.3, complete the first root pass 401 after, the welding rod adopting diameter to be less than 4 millimeters carries out multi-pass welding, first welds a part of weld seam of the first groove 406, and the first root pass 401 is formed welding bead 402 in the middle of one deck.This middle welding bead 402 covers the first root pass 401 completely, and wherein, the summation of the first groove 306 and the first root pass 301 thickness is more than or equal to 10 millimeters.
Step 4.4, complete middle welding bead 402 after, adopt the second welding rod and/or welding wire for submerged-arc welding to carry out multi-pass welding, weld the remainder of the first groove 406, and full whole first groove 406 of weldering, middle welding bead 402 is formed the first weld seam layer 403.Here, welding wire for submerged-arc welding diameter is 4 millimeters, and the diameter of the second welding rod is reduced to diameter by 4 to 5 millimeters of prior art and is less than or equal to 4 millimeters, preferably desirable 3 to 4 millimeters, and unequal with the first welding rod.
When full whole first groove 406 of employing submerged-arc welding wire bond, the desirable 450A to 630A of concrete welding current, the desirable 20V to 35V of weldingvoltage.
Step 4.5, complete the first groove 406 welding after, before the welding of beginning second groove 407, first clear up the groove face of the second groove 407.
Step 4.6, bottom centre at the second groove 407, employing diameter is the welding wire for submerged-arc welding of 4 millimeters, weld second root pass 404, maximum weld electric current and maximum weld voltage is adopted when welding this second root pass 404, the desirable 530A to 630A of concrete welding current, the desirable 20V to 35V of weldingvoltage.
Step 4.7, complete the second root pass 404 after, in the second groove 407, adopt diameter to be less than or equal to the welding rod of 4 millimeters and/or diameter is that the welding wire for submerged-arc welding of 4 millimeters carries out multi-pass welding, weld the remainder of the second groove 407, and full whole second groove 407 of weldering, the second root pass 404 is formed the second weld seam layer 405.
When adopt welding wire for submerged-arc welding carry out weldering expire the second groove 407 time, concrete welding parameter is, the desirable 450A to 630A of welding current, the desirable 20V to 35V of weldingvoltage.
Although content of the present utility model has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (8)
1. a groove docking Welding Structure, this Welding Structure is arranged between the connector of two docking, it is characterized in that, this Welding Structure comprises: the first groove and the second groove that are formed at connector joint, and this first groove and the second groove lay respectively at madial wall and the lateral wall of connector; Between first groove and the second groove, interval is arranged, and forms a root face in the junction of two connectors, and two connectors fit tightly at root face place;
The bottom centre of described first groove is provided with the first root pass, and the first root pass is provided with the first weld seam layer of full first groove of weldering;
The bottom centre of described second groove is provided with the second root pass, and the second root pass is provided with the second weld seam layer of full second groove of weldering.
2. groove docking Welding Structure as claimed in claim 1, it is characterized in that, the described connectors of two docking are: the low-alloy steel housings of two docking, or the low-alloy steel housing of docking and low-alloy steel are taken over.
3. groove docking Welding Structure as claimed in claim 1 or 2, it is characterized in that, the length of described root face is less than or equal to 3 millimeters.
4. groove docking Welding Structure as claimed in claim 2, it is characterized in that, in the described low-alloy steel housing of two docking, the first groove and the second groove are double U-groove or UV type groove.
5. groove docking Welding Structure as claimed in claim 2, it is characterized in that, during the low-alloy steel housing of docking and low-alloy steel are taken over, the first groove and the second groove are double U-groove.
6. groove docking Welding Structure as claimed in claim 2, is characterized in that, during the low-alloy steel housing of docking and low-alloy steel are taken over, between the first root pass and the first weld seam layer, be also provided with middle welding bead.
7. groove docking Welding Structure as claimed in claim 6, it is characterized in that, the thickness summation of described middle welding bead and the first root pass is more than or equal to 10 millimeters.
8. groove docking Welding Structure as claimed in claim 1, it is characterized in that, described first root pass and the second root pass cover the intersection of root face two ends and the first groove and the second groove respectively completely.
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|---|---|---|---|
| CN201520206374.9U CN204565440U (en) | 2015-04-08 | 2015-04-08 | Groove docking Welding Structure |
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| CN201520206374.9U CN204565440U (en) | 2015-04-08 | 2015-04-08 | Groove docking Welding Structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759779A (en) * | 2015-04-08 | 2015-07-08 | 上海电气核电设备有限公司 | Groove butt welding structure and welding method thereof |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759779A (en) * | 2015-04-08 | 2015-07-08 | 上海电气核电设备有限公司 | Groove butt welding structure and welding method thereof |
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