CN114260575A - Welding method for support device - Google Patents
Welding method for support device Download PDFInfo
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- CN114260575A CN114260575A CN202111514948.5A CN202111514948A CN114260575A CN 114260575 A CN114260575 A CN 114260575A CN 202111514948 A CN202111514948 A CN 202111514948A CN 114260575 A CN114260575 A CN 114260575A
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- 238000003466 welding Methods 0.000 title claims abstract description 278
- 238000000034 method Methods 0.000 title claims abstract description 57
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 24
- 229910052786 argon Inorganic materials 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 9
- 238000007514 turning Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000003754 machining Methods 0.000 abstract description 13
- 239000000047 product Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000005266 casting Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application provides a welding method of a supporting device, relates to the technical field related to welding and manufacturing of nuclear power products, and is used for solving the problem that a base plate is seriously deformed in a welding process due to the fact that a fillet weld at the upper part of the base plate is large. The application relates to a welding method of a supporting device, wherein the supporting device comprises a bottom plate, a supporting piece and a flange, and the welding method comprises the following steps: s1: providing a bottom plate, wherein the initial thickness of the bottom plate is larger than the finished thickness of the bottom plate; s2: and alternately welding the lower corner weld and the upper corner weld. This application increases the thickness dimension of welding front bottom plate, and the increase of thickness dimension not only can improve the anti deformability of bottom plate in welding process, and the 15mm machining allowance that the bottom plate increases moreover all puts in the bottom plate lower part, because lower part machining is opposite with the deformation influence direction of upper portion welding to the product, offsets partial upper portion welding deformation through the machining deformation of lower part, reduces the structure and makes the deflection.
Description
Technical Field
The application relates to the technical field related to welding and manufacturing of nuclear power products, in particular to a welding method of a supporting device.
Background
The supporting seat is an important part of transmission equipment in nuclear power products, provides support for various transmission parts in the nuclear power equipment, and has very high requirements on the manufacturing of the supporting seat. The supporting seat is formed by welding a bottom plate, a supporting ring, a supporting block and a flange. The current manufacturing methods for the above products are casting, integral machining and manual welding. The casting needs a mold, the cost for manufacturing the mold is high, most nuclear power products are single pieces, the cost performance of the casting is extremely low, and the manufacturing period is long. The integral processing does not need to manufacture a mould and can ensure better precision, but the integral processing wastes a large amount of raw materials, the manufacturing period is longer, and the cost performance is lower. The most common mode is manual welding, but the fillet weld at the upper part of the bottom plate is large (the fillet weld is 20mm thick), so that the bottom plate is seriously deformed in the welding process, and the shape correction difficulty is large after the welding is finished, thereby influencing the stability of the final product. The problem of large welding deformation of supporting seat parts used for nuclear power products is not effectively solved. For this purpose, a method for welding a bearing device is proposed.
Disclosure of Invention
The application provides a welding method of a supporting device, and aims to solve the problems that the base plate is seriously deformed in the welding process due to the fact that a fillet weld at the upper part of the base plate is large, the shape correction difficulty is large after welding is completed, and the stability of a final product is influenced.
To achieve the above object, the present application provides a welding method of a supporting device including a base plate, a supporting member, and a flange, the welding method including:
s1: providing a bottom plate, wherein the initial thickness of the bottom plate is greater than the finished product thickness of the bottom plate, forming a welding hole on the bottom plate, vertically installing the supporting piece in the welding hole from the upper part of the bottom plate, and processing a groove at the lower end of the supporting piece;
s2: alternately welding a lower corner weld and an upper corner weld, welding the support to the base plate; the lower corner welding seam is positioned between the inclined plane of the support groove and the side wall of the welding hole, and the upper corner welding seam is positioned between the inclined plane of the support groove and the upper end face of the bottom plate; in the alternate welding process, welding an anti-deformation tool on the bottom surface of the bottom plate; after welding is completed, the anti-deformation tool is detached from the bottom plate;
s3: turning the bottom plate from bottom to top to reduce the thickness of the finished bottom plate, and then turning the bottom plate from top to bottom to form the flange; and
s4: and matching and butting the upper end of the flange and the lower end of the bottom plate and then welding the upper end of the flange and the lower end of the bottom plate together.
In some embodiments of the present application, the step S2 includes:
s21: after the welding of the lower corner welding seam is finished, stopping welding the upper corner welding seam, welding the deformation-preventing tool on the bottom surface of the bottom plate, and then welding the rest part of the upper corner welding seam; and
s22: and after the rest parts of the upper corner welding seams are completely welded, the deformation-preventing tool is detached from the bottom plate.
In some embodiments of the present application, in the step S21, when welding the remaining part of the upper corner weld, the following steps are adopted:
s201: dividing the rest part of the upper-corner welding seam into even number of equally divided circular arcs on the circumference of the same horizontal plane;
s202: and then symmetrically and alternately welding even number of equally divided circular arcs until the rest part of the upper-corner welding seam is finished.
In some embodiments of the present application, in step S3, the bottom plate is machined to form an annular boss with a height of 10mm and a wall thickness of 20mm, the flange is machined to form a groove with a depth of 10mm, and the unmachined portion of the flange forms a welding table with a height of 10 mm.
In some embodiments of the present application, the welding of the flange and the bottom plate in the step S4 includes the following steps:
s301: the lower end of the annular boss and the upper end of the welding table are respectively machined with grooves;
s302: along the vertical direction, the lower end of the annular boss is in matched butt joint with the upper end of the welding table, and a welding seam is formed at the joint;
s303: performing first-step welding on the welding seam in a laser welding mode;
s304: and then, carrying out second-step welding on the welding seams of the rest parts by adopting manual welding.
In some embodiments of the present application, the weld joint includes a "U" shaped portion and a "V" shaped portion formed by combining the groove on the annular projection and the groove on the welding table, and a connecting portion located between the "U" shaped portion and the "V" shaped portion, the first step of laser welding is used for welding the connecting portion of the weld joint, and the second step of manual welding is used for welding the "U" shaped portion and the "V" shaped portion of the weld joint.
In some embodiments of this application, assembled preapre for an unfavorable turn of events shape frock includes first horizontal pole, second horizontal pole, first recess and second recess, the first recess of a plurality of has been seted up on the first horizontal pole, a plurality of second recess has been seted up on the second horizontal pole, first horizontal pole with the second horizontal pole passes through first recess with the second recess matches the lock and installs together.
In some embodiments of the present application, the deformation prevention tool is an integral structure or an assembled structure; the deformation-preventing tool with the integral structure is a steel plate.
In some embodiments of this application, down fillet weld the upper corner welding seam with what the welding mode of preapring for an unfavorable turn of events frock all adopted is argon arc welding, and protective gas is argon gas, and the welding parameter that adopts is voltage size for 12V 3V among the above-mentioned welding process, and current strength is 160A 10A, and welding speed is 10 cm/min.
In some embodiments of the present application, the manual welding of the annular boss and the bottom plate is performed by argon arc welding, the shielding gas is argon gas, and the welding parameters used in the welding process are that the voltage is 12V ± 3V, the current intensity is 160A ± 10A, and the welding speed is 10 cm/min; the welding parameters of the laser welding process are that the power is 11-13KW, the welding speed is 11-14mm/s, and the defocusing amount is 15 mm.
Has the advantages that:
this application increases the thickness dimension of bottom plate before the welding, improves to 55mm by 40mm, and the increase of thickness dimension not only can improve the resistance to deformation ability of bottom plate in welding process, and the 15mm machining allowance that the bottom plate increases all puts the bottom plate lower part in addition, because lower part machining is opposite with the deformation influence direction of upper portion welding to the product, warp through the machining of lower part and offsets partial upper portion welding deformation, reduces the structure and makes the deflection.
In order to solve the problem that the deformation of the bottom plate is too large in the welding process of the bottom plate and the flange, when the 15mm allowance of the bottom plate of the vehicle is reserved, the height of the vehicle is 10mm, the wall thickness of the annular boss is 20mm, the height of the flange is reduced by 10mm, and the flange is welded with the boss of the bottom plate.
In the application, the welding sequence is optimized, the upper side and the lower side are adopted to alternately weld the upper corner welding line and the lower corner welding line, so that the welding deformation can be effectively reduced, and in addition, the welding method can be used for solving the problem that the welding deformation is caused by the welding method
Increased the shape frock of preapring for an unfavorable turn of events in this application, according to the analysis to welding deformation trend at the welded in-process, increased corresponding shape frock of preapring for an unfavorable turn of events, prevented among the welding process that the product warp, specifically, after fillet weld welding accomplishes down, the shape frock of preapring for an unfavorable turn of events is welded on the lower terminal surface of bottom plate, welds remaining upper corner welding seam after that.
The welding mode is improved in the application, and particularly when the flange and the annular boss are welded, the mode that laser welding and manual welding are combined is adopted, so that the dilemma that an ultra-high-power laser welding machine is limited due to the fact that an enterprise manufactures nuclear power products is effectively solved, and economic benefits are brought to the enterprise.
Manufacturing through adopting the welded mode in this application, reducing the machining allowance, save material saves the cost for the manufacturing of product.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1: schematic top view of overall structure of supporting device
FIG. 2: front view of the overall structure of the supporting device
FIG. 3: schematic diagram of the overall structure of the supporting device
FIG. 4: schematic diagram of bottom plate structure
FIG. 5: schematic structure of support block
FIG. 6: schematic view of a support ring structure
FIG. 7: schematic diagram of tool arrangement structure
FIG. 8: schematic view of tool strip (I)
FIG. 9: schematic structure of tool strip (II)
FIG. 10: schematic diagram of partially welded structure
FIG. 11: schematic diagram of flange structure
FIG. 12: schematic structural diagram of rear bottom plate of vehicle-out annular boss
FIG. 13: fig. 12 is a schematic diagram of a partially enlarged structure of the annular boss portion of the base plate
FIG. 14: FIG. 13 is a schematic diagram of the angle labeling of the local size of the annular protrusion of the bottom plate
FIG. 15: FIG. 11 is an enlarged view of a flange portion
FIG. 16: FIG. 15 is a schematic view of a flange with local dimension angle marks
FIG. 17: schematic view of the weld joint between the support ring and the base plate
FIG. 18: schematic view of the welded joint between the supporting block and the base plate
FIG. 19: flange and base plate ring boss welding joint type schematic diagram
FIG. 20: cross-sectional view after welding
FIG. 21: a manufacturing flow diagram.
The main reference numbers in the drawings accompanying the present specification are as follows:
the anti-deformation welding device comprises a bottom plate 1, an annular boss 11, a supporting piece 2, a supporting ring 21, a supporting block 22, a flange 4, a groove body 41, a welding table 42, a welding hole 5, an anti-deformation tool 7, a first cross rod 71, a second cross rod 72, a first groove 73 and a second groove 74.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The present application provides a welding method for a support device, which will be described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to related descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
Referring to fig. 1-4, a method for welding a supporting device includes a base plate 1, a supporting member 2, and a flange 4, where the supporting device is a supporting base, and the supporting base is described below as an example. The lower end of the support member 2 is processed with a groove, and the welding method comprises the following steps:
s1: providing a base plate 1, wherein the initial thickness of the base plate 1 is greater than the finished thickness of the base plate 1, increasing the thickness dimension of the base plate 1 from 40mm to 55mm, and the increased 15mm machining allowance of the base plate 1 is placed at the lower part of the base plate 1, and the increase of the thickness dimension of the base plate 1 can improve the deformation resistance of the base plate 1 in the welding process. Welding holes 5 are formed in the bottom plate 1, the supporting pieces 2 are vertically installed in the welding holes 5 (the side where the supporting pieces 2 are installed is the upper side), and the number of the welding holes 5 corresponds to the number of the supporting pieces 2. The support member 2 includes one or more of a support ring 21 and a support block 22, in the embodiment shown in fig. 3, the support member 2 includes a support ring 21 and a support block 22, and the support member 2 will be described below by taking the support ring 21 and the support block 22 as an example.
S2: in the prior art, the lower corner weld seam and the upper corner weld seam are welded in a single-side welding mode, that is, after the lower corner weld seam or the upper corner weld seam is welded, another corner weld seam is welded, and the bottom plate 1 is seriously deformed due to the welding mode. In order to solve the above problem, in this embodiment, when the lower corner weld seam and the upper corner weld seam are welded, the lower corner weld seam and the upper corner weld seam are welded in an even and alternate manner. In the specific embodiment of fig. 5 and 6, the bevel inclined surface of the support 2 and the side wall of the welding hole 5 form a lower fillet weld, and the bevel inclined surface of the support 2 and the upper end surface of the bottom plate 1 form an upper fillet weld. Specifically, the support ring 21 and the support block 22 are welded in sequence, first, the support ring 21 is placed in the welding hole 5 along the vertical direction, welding parameters are adopted during welding, lower-corner welding seams and upper-corner welding seams are welded alternately, and after the lower-corner welding seams are welded, the upper-corner welding seams are stopped to continue welding, namely, the alternate welding process is stopped. Secondly, the supporting block 22 is welded, the welding process of the supporting block 22 and the supporting ring 21 is consistent, and after the welding of the lower fillet weld is finished, the welding of the upper fillet weld is stopped. The welding mode can effectively alleviate the problem that the bottom plate 1 is deformed due to asymmetrical welding.
It should be noted that the welding mode of the upper corner welding line and the lower corner welding line is argon arc welding, the shielding gas is argon, the constant welding parameters are that the voltage is 12V +/-3V, the current intensity is 160A +/-10A, and the welding speed is 10 cm/min.
After the alternate welding work of the supporting ring 21 and the supporting block 22 is completed, the deformation-preventing tool 7 is welded on the bottom surface of the bottom plate 1, then the rest part of the upper corner welding seam is welded, and specifically, after the alternate welding of the lower corner welding seam and the upper corner welding seam is completed, the deformation-preventing tool 7 is spot-welded on the bottom surface of the bottom plate 1. Then respectively right the support ring 21 with the last corner weld remaining part of supporting block 22 welds, when welding the remaining part of going up the corner weld, because welding process can have the phenomenon of expend with heat and contract with cold, after the welding is accomplished, the welding part has the tractive effect to the not welding part, consequently when welding the remaining part and go up the corner weld, can make bottom plate 1 upwards perk all around warp the deformation, and the setting of preapring for an unfavorable turn of events shape frock 7 can play and slow down the ascending perk deformation of bottom plate 1. This step is consistent with the welding mode and welding parameters of the above welding.
Further, when welding the fillet weld on the remaining part, taking the support ring 21 as an example, the fillet weld on the remaining part is divided into even number of equal arcs on the same horizontal plane circumference along the circumference of the support ring 21; and the even number of the equal arc arcs are symmetrically and alternately welded until the fillet weld on the rest part is welded. The division of the even number of the bisecting arcs can be four, six or eight divisions, and the person skilled in the art can adjust the division according to the actual size of the support ring 21. In this embodiment, the upper corner weld is divided into eight equal parts, and when welding, the eight equal parts are symmetrically divided into two groups, and the two groups of arcs are alternately welded.
Referring to fig. 7-10, the deformation preventing tool 7 is of an integral structure or an assembled structure. Integral shape frock 7 of preapring for an unfavorable turn of events is a steel sheet, and the effect of convenient transportation can be realized to integral structure's setting. Assembled shape frock 7 of preapring for an unfavorable turn of events includes first horizontal pole 71, second horizontal pole 72, first recess 73 and second recess 74, the first recess of a plurality of has been seted up on the first horizontal pole, a plurality of second recess 74 has been seted up on the second horizontal pole, first horizontal pole 71 with second horizontal pole 72 passes through first recess 73 with second recess 74 matches the lock and installs together, assembled shape frock 7 of preapring for an unfavorable turn of events takes place to damage the back at partial built-up piece, can be through changing impaired spare, make the frock of preapring for an unfavorable turn of events can continue to use, and the effect of reuse can be realized to the part of not damaging like this, can reach resources are saved's effect.
After the welding of all the upper corner welding lines is completed, the deformation-preventing tool 7 is detached from the bottom plate 1, and specifically, after the welding of the rest parts of the upper corner welding lines is completed, the device is cooled integrally, and the deformation-preventing tool 7 is detached from the bottom plate 1 by using an angle grinder (not shown).
S3: right bottom plate 1 from down up carries out the car processing in order to attenuate to the finished product thickness of bottom plate, then from last down car processing forms flange 4, specifically, bottom plate 1 is by the car processing out a height be 10mm, annular boss 11 that the wall thickness is 20mm (as shown in fig. 12-14). When the bottom plate 1 is subjected to the upward interference cutting force, the periphery of the bottom plate 1 is bent downward, and the deformation of the bottom plate 1 tilting upward in step S2 can be offset. The flange 4 is turned from top to bottom to form a groove body 41 with the depth of 10mm, a welding table 42 (shown in figures 15-16) with the height of 10mm is formed at the unprocessed part of the flange 4, and the turning of the flange 4 is to realize a more convenient welding effect after being matched and butted with the annular boss 11.
S4: and matching and butting the upper end of the flange 4 and the lower end of the bottom plate 1 and then welding together.
Referring to fig. 19-20, in the actual welding process, since the flange 4 has a thick wall, an ultra-high power laser welder (not shown) is required to be used for welding, the cost of the ultra-high power laser welder is high, the ultra-high power laser welder has no economy, and the ultra-high power laser welder has a limitation on purchasing in the domestic key industry. Therefore, the welding mode of the flange 4 and the bottom plate 1 is changed in the embodiment, and the welding mode combining manual welding and laser welding is adopted, so that the dilemma that an ultrahigh-power laser welding machine is limited to purchase due to the fact that an enterprise manufactures nuclear power products is effectively solved, and economic benefits are brought to the enterprise. And moreover, the mode of combining manual welding and laser welding is adopted, so that the welding deformation in the manufacturing process of the supporting seat can be reduced, and the manufacturing precision of the supporting seat is improved. Specifically, the welding process comprises the following steps:
s301: referring to fig. 13 and 15, grooves are machined on both the lower end of the annular boss 11 and the upper end of the welding table 42, and the arrangement of the grooves can ensure that the welding process is more convenient.
S302: along the vertical direction, the annular boss 11 and the welding table 42 are matched and butted to form a welding joint, the welding joint comprises a U-shaped part and a V-shaped part which are formed by combining the groove on the annular boss 11 and the groove on the welding table 42, and a connecting part which is positioned between the U-shaped part and the V-shaped part, please refer to fig. 19, it can be known that the whole width of the welding joint is 23mm, the width of the connecting part of the welding joint is 12mm, the width of the U-shaped part is 4mm, and the width of the V-shaped part is 7 mm.
S303: the method comprises the steps of adopting a laser welding mode, carrying out first-step welding on the welding seam, specifically introducing a laser wire filling technology in the first-step welding process, welding the connecting part of the welding seam, wherein in the laser welding process, the adopted welding parameters are power 11-13KW, the welding speed is 11-14mm/s, the defocusing amount is 15mm, the laser welding can effectively reduce the manufacturing time of the supporting seat, the manufacturing efficiency is improved, and precious time is strived for the on-time delivery of products.
S304: and then, performing second-step welding on the rest welding seams by adopting manual welding, specifically, in the second-step welding, completing the welding of the U-shaped part and the V-shaped part of the welding seams by adopting a manual welding mode, wherein the manual welding in the step adopts argon arc welding, the shielding gas is argon, the voltage is 12V +/-3V, the current intensity is 160A +/-10A, and the welding speed is 10 cm/min.
This application increases the thickness dimension of welding preceding bottom plate 1, improves to 55mm by 40mm, and the increase of thickness dimension not only can improve the resistance to deformation ability of bottom plate 1 in welding process, and the 15mm machining allowance of bottom plate 1 increase all puts in bottom plate 1 lower part moreover, because lower part machining and upper portion welding are opposite to the deformation influence direction of product, and the machining deformation through the lower part offsets partial upper portion welding deformation, reduces the structure and makes the deflection.
In order to solve the problem that the deformation of the bottom plate 1 is too large in the welding process of the bottom plate 1 and the flange 4, the height of the bottom plate is 10mm when the vehicle bottom plate is in 15mm allowance, the annular boss 11 with the wall thickness of 20mm is reduced by 10mm, the welding table 42 is formed, and the flange 4 is welded with the annular boss 11 of the bottom plate 1.
The welding sequence is optimized in the application, the upper side and the lower side are adopted to alternately weld the lower corner welding line and the upper corner welding line, and therefore the welding deformation can be effectively reduced.
Increased shape frock 7 of preapring for an unfavorable turn of events in this application, according to the analysis to welding deformation trend at the welded in-process, increased corresponding shape frock 7 of preapring for an unfavorable turn of events, prevented among the welding process product deformation, specifically, after fillet weld welding accomplishes down, the shape frock 7 of preapring for an unfavorable turn of events is welded on the lower terminal surface of bottom plate, welds remaining upper corner welding seam after that.
The welding mode is improved in the application, and particularly when the flange 4 and the annular boss 11 are welded, the mode of combining laser welding and manual welding is adopted, so that the dilemma that an ultra-high-power laser welding machine is purchased due to manufacturing of nuclear power products by enterprises is effectively solved, and economic benefits are brought to the enterprises.
Manufacturing through adopting the welded mode in this application, reducing the machining allowance, save material saves the cost for the manufacturing of product.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims. In addition, the principle and the implementation manner of the present application are explained by applying specific examples in the specification, the above description of the embodiments is only for helping understanding the method and the core idea of the present application, and the content of the present application should not be construed as limiting the present application.
Claims (10)
1. A method of welding a support device, the support device including a floor, a support member, and a flange, the method comprising:
s1: providing a bottom plate, wherein the initial thickness of the bottom plate is greater than the finished product thickness of the bottom plate, forming a welding hole on the bottom plate, vertically installing the supporting piece in the welding hole from the upper part of the bottom plate, and processing a groove at the lower end of the supporting piece;
s2: alternately welding a lower corner weld and an upper corner weld, welding the support to the base plate; the lower corner welding seam is positioned between the inclined plane of the support groove and the side wall of the welding hole, and the upper corner welding seam is positioned between the inclined plane of the support groove and the upper end face of the bottom plate; in the alternate welding process, welding an anti-deformation tool on the bottom surface of the bottom plate; after welding is completed, the anti-deformation tool is detached from the bottom plate;
s3: turning the bottom plate from bottom to top to reduce the thickness of the finished bottom plate, and then turning the bottom plate from top to bottom to form the flange; and
s4: and matching and butting the upper end of the flange and the lower end of the bottom plate and then welding the upper end of the flange and the lower end of the bottom plate together.
2. The welding method of a support device according to claim 1, wherein the step S2 includes:
s21: after the welding of the lower corner welding seam is finished, stopping welding the upper corner welding seam, welding the deformation-preventing tool on the bottom surface of the bottom plate, and then welding the rest part of the upper corner welding seam; and
s22: and after the rest parts of the upper corner welding seams are completely welded, the deformation-preventing tool is detached from the bottom plate.
3. The welding method for a support device according to claim 2, wherein in the step S21, when welding the remaining portion of the upper corner weld, the following steps are adopted:
s201: dividing the rest part of the upper-corner welding seam into even number of equally divided circular arcs on the circumference of the same horizontal plane;
s202: and then symmetrically and alternately welding even number of equally divided circular arcs until the rest part of the upper-corner welding seam is finished.
4. The welding method for a supporting device as claimed in claim 1, wherein the bottom plate is machined to form an annular boss with a height of 10mm and a wall thickness of 20mm in step S3, the flange is machined to form a groove with a depth of 10mm, and the unmachined part of the flange forms a welding table with a height of 10 mm.
5. The welding method for a supporting device according to claim 4, wherein the welding of the flange and the bottom plate in the step S4 includes the steps of:
s301: the lower end of the annular boss and the upper end of the welding table are respectively machined with grooves;
s302: along the vertical direction, the lower end of the annular boss is in matched butt joint with the upper end of the welding table, and a welding seam is formed at the joint;
s303: performing first-step welding on the welding seam in a laser welding mode;
s304: and then, carrying out second-step welding on the welding seams of the rest parts by adopting manual welding.
6. The welding method for a supporting device according to claim 5, wherein the welding seam includes a "U" shaped portion and a "V" shaped portion formed by combining a groove on the annular boss and a groove on the welding table, and a connecting portion between the "U" shaped portion and the "V" shaped portion, the laser welding of the first step is used for welding the connecting portion of the welding seam, and the manual welding of the second step is used for welding the "U" shaped portion and the "V" shaped portion of the welding seam.
7. The welding method for the supporting device according to claim 6, wherein the assembled anti-deformation tool comprises a first cross bar, a second cross bar, a first groove and a second groove, wherein the first cross bar is provided with a plurality of first grooves, the second cross bar is provided with a plurality of second grooves, and the first cross bar and the second cross bar are matched, buckled and installed together through the first groove and the second groove.
8. The bearing device welding method according to claim 6, wherein the deformation-preventing tool is of an integral structure or an assembled structure; the deformation-preventing tool with the integral structure is a steel plate.
9. The method for welding a supporting device according to any one of claims 1 to 7, wherein argon arc welding is adopted as the lower fillet weld, the upper fillet weld and the deformation prevention tool, argon is adopted as the shielding gas, and the welding parameters adopted in the welding process are 12V +/-3V in voltage, 160A +/-10A in current and 10cm/min in welding speed.
10. The welding method of the supporting device according to claim 5, wherein the manual welding of the annular boss and the bottom plate is performed by argon arc welding, the shielding gas is argon gas, and the welding parameters used in the welding process are that the voltage is 12V +/-3V, the current intensity is 160A +/-10A, and the welding speed is 10 cm/min; the welding parameters of the laser welding process are that the power is 11-13KW, the welding speed is 11-14mm/s, and the defocusing amount is 15 mm.
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