CN212217496U - Thick-section narrow-gap T-shaped welding joint structure - Google Patents
Thick-section narrow-gap T-shaped welding joint structure Download PDFInfo
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- CN212217496U CN212217496U CN202020748486.8U CN202020748486U CN212217496U CN 212217496 U CN212217496 U CN 212217496U CN 202020748486 U CN202020748486 U CN 202020748486U CN 212217496 U CN212217496 U CN 212217496U
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Abstract
The utility model discloses a narrow clearance T type welded joint structure of thick cross-section relates to water and electricity trade thick plate, super thick plate welded manufacturing technical field. The utility model discloses processing into the rectangle structure in the 60mm within range more than the dysmorphism thick plate welding end, change the arc welding bead into the linear type welding bead, can simplify the robot welding orbit, reduce the programming degree of difficulty, the scarf of certain inclination is set to at the face of weld of rectangle structure, the narrow clearance groove structure of I type is designed into to the welding groove between dysmorphism thick plate and the plane thick plate, change original multilayer multiple welding into one deck one, simplify welding process, reduce not fused probability and welding bead clearance number of times between the welding bead, improve welding efficiency.
Description
Technical Field
The utility model relates to a water and electricity trade thick plate, super thick plate welded production manufacturing technical field, more specifically say and relate to a narrow clearance T type welded joint structure in thick cross-section.
Background
The thick plate and ultra-thick plate structure is widely applied to the hydropower manufacturing industry, the thick plate welding joint mainly comprises butt joint, T joint and the like, and the traditional welding method of the T joint generally adopts a workpiece K-shaped groove to carry out multilayer multi-path MAG welding. Along with the continuous increase of welding structure thickness, thick plate groove area sharply increases, leads to welding engineering volume to multiply, and production efficiency is low, and during multilayer multichannel welding, easily lead to fusing badly.
Because the stability of welding quality can be greatly improved by robot welding, the application of the arc welding robot is more and more extensive. However, for the welding of a thick plate special-shaped structure, the welding of an arc welding robot has many difficulties, mainly including:
(1) when a thick plate is T-connected, a K-shaped groove is opened to carry out multilayer and multi-pass welding, and programming is generally carried out in an online teaching or offline programming mode. The online teaching time is long, and the efficiency is low; during off-line programming, welding deformation is caused in the welding hot process, on-site deviation correction is often needed, a reliable tracking mode for automatic deviation correction is not available at present, and manual deviation correction is needed, so that the production efficiency is low;
(2) along with the increase of the thickness of the thick plate, the area of the groove is sharply increased, the number of welding tracks on each layer is increased, the cleaning between the tracks needs long time, and the non-fusion between the tracks is easy to form;
(3) the traditional K-shaped groove is adopted for multilayer and multi-pass welding, the welding quantity is huge, and due to the huge structure of hydroelectric equipment and limited welding space, the linkage of multiple robots cannot be realized, and the production output of one or two robots cannot be brought into a normal production flow;
(4) the welding of special-shaped structural parts has irregular welding bead and complex programming, and the accuracy of the track of the robot cannot be ensured, so that the welding bead is not formed well.
Therefore, the robot welding device cannot be widely used for robot welding of thick plates and ultra-thick plates with special-shaped structures all the time.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect and the deficiency that exist among the above-mentioned prior art, the utility model provides a thick section narrow gap T type welded joint structure, the utility model discloses an invention aim at solve among the prior art T type joint adopt conventional K type groove design and the welding bead that leads to is irregular, and the welding bead planning degree of difficulty is big, and during multilayer multichannel welding, the problem that does not fuse is formed very easily between the way. The utility model discloses processing into the rectangle structure in the 60mm within range more than the dysmorphism thick plate welding end, change the arc welding bead into the linear type welding bead, can simplify the robot welding orbit, reduce the programming degree of difficulty, the scarf of certain inclination is set to at the face of weld of rectangle structure, the narrow clearance groove structure of I type is designed into to the welding groove between dysmorphism thick plate and the plane thick plate, change original multilayer multiple welding into one deck one, simplify welding process, reduce not fused probability and welding bead clearance number of times between the welding bead, improve welding efficiency.
In order to solve the problems existing in the prior art, the utility model discloses a realize through following technical scheme:
the utility model provides a thick narrow clearance T type welded joint structure of cross-section, includes special-shaped thick plate and plane thick plate, and the welding of special-shaped thick plate forms T type welded joint on the plane thick plate, its characterized in that: a rectangular structure is processed within the range of 60mm above the welding end of the special-shaped thick plate, and the width of the rectangular structure is not less than the maximum width of the special-shaped thick plate; the welding face of the rectangular structure is an oblique welding face with a certain inclination, an I-shaped narrow gap groove structure is formed, the gap between the root of the I-shaped narrow gap groove and the plane thick plate is smaller than 16mm, and the gap between the upper end of the I-shaped narrow gap groove and the plane thick plate is smaller than 20 mm.
And the two ends of the special-shaped thick plate are respectively provided with a K-shaped groove for tack welding.
And a gap is reserved between the K-shaped groove and the I-shaped narrow gap groove.
And an auxiliary support piece is machined at the root part of the type I narrow gap groove.
Compared with the prior art, the utility model discloses profitable technological effect who brings shows:
1. the utility model discloses processing into the rectangle structure in the 60mm within range more than the dysmorphism thick plate welding end, change the arc welding bead into the linear type welding bead, can simplify the robot welding orbit, reduce the programming degree of difficulty, the scarf of certain inclination is set to at the face of weld of rectangle structure, the narrow clearance groove structure of I type is designed into to the welding groove between dysmorphism thick plate and the plane thick plate, change original multilayer multiple welding into one deck one, simplify welding process, reduce not fused probability and welding bead clearance number of times between the welding bead, improve welding efficiency.
2. The utility model discloses respectively set up the K type groove of certain length at the both ends of dysmorphism thick plate for the tack welding, its length can be confirmed according to operating condition, leaves certain clearance between K type groove and narrow clearance groove, and the flat welding torch extends the clearance part during the welding to make the tip that the contact tip in the middle of the welding torch can reach the narrow clearance groove.
3. The utility model discloses an innovation point lies in changing the welding end of special-shaped structure thick plate into the linear type by the dysmorphism, changes thick plate T type joint into type I groove by K type groove. The advantages after the change are that: the welding end of the thick plate with the special-shaped structure is changed into a linear type from special shape, so that the welding path track can be simplified. The thick plate T-shaped joint is changed from a K-shaped groove to an I-shaped groove, multilayer multi-pass welding is changed into single-pass one-pass welding, welding pass planning is simplified, the phenomenon that fusion does not occur between welding passes is avoided, welding pass cleaning is reduced, welding quantity is reduced by more than 60%, and welding efficiency is improved.
4. The utility model discloses the root processing at the narrow clearance groove of type I type has the location of the convenient special-shaped thick plate of supplementary support piece, convenient welding.
Drawings
FIG. 1 is a schematic structural view of the assembly of a special-shaped thick plate and a plane thick plate;
FIG. 2 is a schematic structural diagram of a welding end of a specially-shaped thick plate;
FIG. 3 is a schematic structural view of a conventional K-groove in the prior art;
FIG. 4 is a schematic structural view of a type I narrow gap groove of the present invention;
FIG. 5 is a schematic view of a narrow gap groove structure after the assembly of the special-shaped thick plate and the planar thick plate of the present invention;
FIG. 6 is a schematic structural view of a narrow gap T-joint of the present invention;
FIG. 7 is a block diagram of a turbine shroud assembly;
FIG. 8 is a view of the narrow gap welding position 1 of the turbine seat ring robot;
FIG. 9 is a view of the narrow gap welding position 2 of the turbine seat ring robot;
reference numerals: 1. the special-shaped thick plate comprises a special-shaped thick plate body, 2 a plane thick plate body, 3 an auxiliary supporting piece, 4 an oblique welding surface, 5 a fixed guide vane, 6 a ring plate body, 7 a lapping block, wherein a represents a gap between the root of a similar I-shaped narrow gap groove and the plane thick plate body, b represents a gap between the upper end of the similar I-shaped narrow gap groove and the plane thick plate body, L1 represents a rectangular structure, L2 represents a gap between a K-shaped groove and the similar I-shaped narrow gap groove, L3 represents the K-shaped groove, d1 represents the section shape of the special-shaped thick plate body, and d2 represents the section shape of the rectangular structure.
Detailed Description
The technical solution of the present invention will be further elaborated with reference to the drawings attached to the description.
Example 1
As a preferred embodiment of the present invention, referring to the accompanying drawings 1, 2, 4 and 5 of the specification, the present embodiment discloses:
a thick-section narrow-gap T-shaped welding joint structure comprises a special-shaped thick plate 1 and a plane thick plate 2, as shown in figure 1, the special-shaped thick plate 1 is welded on the plane thick plate 2 to form a T-shaped welding joint, a rectangular structure d2 is machined within a range of 60mm above the welding end of the special-shaped thick plate, and the width of the rectangular structure d2 is not less than the maximum width of the special-shaped thick plate; the welding surface of the rectangular structure is an oblique welding surface 4 with a certain inclination, so that an I-shaped narrow gap groove structure is formed, the gap a between the root of the I-shaped narrow gap groove and the plane thick plate is smaller than 16mm, and the gap b between the upper end of the I-shaped narrow gap groove and the plane thick plate is smaller than 20 mm.
Example 2
As another preferred embodiment of the present invention, referring to fig. 1-6 of the specification, the present embodiment discloses:
a thick section narrow gap T type welded joint structure, the T type of special-shaped structure thick plate connects generally by two structure components and constitutes as shown in figure 1, wherein 1 is super thick section special-shaped thick plate, 2 is the plane thick plate, the welding groove of joint is opened on special-shaped thick plate 1, consequently mainly carries out the groove design to special-shaped thick plate 1. The cross section of the special-shaped thick plate 1 is shaped as d1 in fig. 2, the conventional groove is a K-shaped groove, and a T-shaped joint is formed with the flat thick plate 2, as shown in fig. 3, the structural groove is large, and the weld bead profile is irregular. The manual welding or the robot welding is generally adopted in the conventional welding, multilayer multi-pass welding is carried out, the labor amount of the manual welding is large, and when the robot welding is adopted, because the welding bead is irregular, the difficulty of welding bead planning is large, and during the multilayer multi-pass welding, the non-fusion between the roads is extremely easy to form. And an auxiliary support piece 3 is processed at the root part of the type I narrow gap groove.
In the embodiment, the special-shaped thick plate 1 is processed to a rectangular structure within a range of 60mm above the welding end, the arc welding bead is changed into a linear welding bead, the welding track of the robot is simplified, and the programming difficulty is reduced, as shown in d2 in fig. 2. A certain inclined plane is arranged at the L1 part of the rectangular structure to form a similar I-shaped narrow gap groove structure, as shown in fig. 4 and 5, the root a of the narrow gap groove is smaller than 16mm, and the upper end b of the narrow gap groove is smaller than 20mm, one-layer narrow gap welding is carried out, the original multi-layer multi-pass welding is changed into one-layer one-pass welding, the welding process is simplified, the probability of incomplete fusion between welding passes and the times of cleaning the welding passes are reduced, and the welding efficiency is improved. A conventional K-shaped groove L3 is formed in each of two ends of the special-shaped thick plate in a certain length and used for tack welding, a certain gap L2 is reserved between the K-shaped groove and the narrow-gap groove, and a flat welding torch extends to the gap part during welding, so that a contact tip in the middle of the welding torch can reach the end part of the narrow-gap groove.
Example 3
As another preferred embodiment of the present invention, referring to fig. 1-9 of the specification, the present embodiment discloses:
the application of the thick-section narrow-gap T-shaped welding joint structure in a water turbine seat ring is as follows:
the seat ring mainly comprises a fixed guide 5 and a ring plate 6, the thickness of the fixed guide vane 5 can reach 270mm at most, the thickness of the ring plate 6 can reach 250mm at most, in the embodiment, the special-shaped thick plate is equivalent to the fixed guide vane 5 on the seat ring, and the plane thick plate is equivalent to the ring plate 6 of the seat ring.
The welding grooves of the seat ring fixed guide vane 5 and the ring plate 6 are formed in the end part of the fixed guide vane 5, so that the groove design is mainly performed on the fixed guide vane 5, the section of the fixed guide vane 5 is of an abnormal structure (shown as d1 in fig. 2), a rectangular structure (shown as d2 in fig. 2) is processed in a range of 60mm above the welding end, a certain inclined plane is arranged on a rectangular part L2 to form an approximate I-shaped narrow gap groove structure, the root part a of the narrow gap groove is smaller than 16mm, the upper end b of the narrow gap groove is smaller than 20mm, a conventional K-shaped groove is formed at each of two ends of the fixed guide vane in a certain length, and a certain gap L2 is reserved between the K-.
Assembling a seat ring: when the conventional seat ring is welded, the two petal seat rings are assembled together in a way that the back surfaces and the opposite surfaces of the two petal seat rings are assembled together by adopting a butt strap so as to control the welding deformation. Compared with the conventional K-shaped groove, the groove size is reduced by 60% when narrow gap welding is adopted, and the welding amount and the welding deformation are correspondingly reduced, so that the method is different from the conventional seat ring assembly. As shown in fig. 7-9, the specific assembly steps are as follows:
(1) scribing on the ring plate according to the drawing of a product;
(2) assembling the fixed guide vane according to the marking and robot welding simulation result;
(3) two blocks 7 are respectively assembled on the upper side and the lower side of the non-welding side of the fixed guide vane to control welding deformation;
(4) and (6) positioning and welding. Welding and positioning welding on the K-shaped groove part, wherein the welding quantity is 20 mm;
(5) and the block 7 is welded. Fillet welding is carried out on the lapping block 7, and the welding leg is 20 mm.
(6) Simulating an automatic welding track of the robot: and planning the welding position of each guide vane and the welding track of the robot in a computer control system by using the solid modeling function of three-dimensional CAD software according to the size, assembly and position relation of each part of the seat ring.
(7) And placing the seat ring on the welding platform according to the computer simulation result.
Seat ring welding: (1) preheating before welding: the bottom weld bead of the workpiece to be welded is preheated by a far infrared electric heating device or flame, and the preheating temperature is determined according to the material and the plate thickness of the seat ring part and is usually 80-150 ℃.
(2) Robot welding programming: and calibrating the base of the workpiece according to the position of the workpiece, and compiling the actual welding track of the robot.
(3) The method comprises the following steps of stretching a flat welding torch into an I-shaped narrow gap groove, carrying out one-layer or two-layer high-efficiency and high-quality welding, cleaning the welding seam by using a steel wire brush after each welding bead is welded, and cleaning the welding seam by using an air shovel after each two layers are welded.
(4) And (3) welding sequence: and after the welding filling amount of the groove of the single fixed guide vane reaches a certain thickness, adjusting the welding position of the welding robot, welding the other fixed guide vane, and sequentially welding the fixed guide vane at the position to a certain thickness. Turning over, welding the fixed guide vane at the other position, and completing welding of the welding seam of the fixed guide vane at the position. Turning over, putting the guide vane to the original position, and welding all welding seams of the guide vane at the position.
Claims (4)
1. The utility model provides a thick narrow clearance T type welded joint structure of cross-section, includes special-shaped thick plate (1) and plane thick plate (2), and welding of special-shaped thick plate (1) forms T type welded joint on plane thick plate (2), its characterized in that: a rectangular structure is processed in a range of 60mm above the welding end of the special-shaped thick plate (1), and the width of the rectangular structure is not less than the maximum width of the special-shaped thick plate (1); the welding surface of the rectangular structure is an oblique welding surface (4) with a certain inclination, a similar I-shaped narrow gap groove structure is formed, the gap a between the root of the similar I-shaped narrow gap groove and the plane thick plate is smaller than 16mm, and the gap b between the upper end of the similar I-shaped narrow gap groove and the plane thick plate is smaller than 20 mm.
2. A thick-section narrow-gap T-shaped weld joint structure as defined in claim 1, wherein: and K-shaped grooves (L3) for tack welding are respectively arranged at two ends of the special-shaped thick plate (1).
3. A thick section narrow gap T-shaped weld joint structure as defined in claim 2, wherein: and a gap (L2) is reserved between the K-shaped groove (L3) and the I-shaped narrow gap groove.
4. A thick section narrow gap T-shaped weld joint structure as claimed in any one of claims 1 to 3, wherein: and an auxiliary support piece (3) is machined at the root part of the type I narrow gap groove.
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| CN202020748486.8U CN212217496U (en) | 2020-05-09 | 2020-05-09 | Thick-section narrow-gap T-shaped welding joint structure |
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| CN202020748486.8U CN212217496U (en) | 2020-05-09 | 2020-05-09 | Thick-section narrow-gap T-shaped welding joint structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113134661A (en) * | 2021-04-25 | 2021-07-20 | 哈尔滨电机厂有限责任公司 | Efficient transverse welding process method for fixed guide vanes of pumping and storage seat ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113134661A (en) * | 2021-04-25 | 2021-07-20 | 哈尔滨电机厂有限责任公司 | Efficient transverse welding process method for fixed guide vanes of pumping and storage seat ring |
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