CN211465131U - Assembly welding device for conical box bottom - Google Patents
Assembly welding device for conical box bottom Download PDFInfo
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- CN211465131U CN211465131U CN201922410085.1U CN201922410085U CN211465131U CN 211465131 U CN211465131 U CN 211465131U CN 201922410085 U CN201922410085 U CN 201922410085U CN 211465131 U CN211465131 U CN 211465131U
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Abstract
The utility model provides a toper bottom of the case assembly welding device, welding set include that base, support frame, stand structure, forked ring hold-down mechanism, a plurality of ball-type top cap subassembly hold-down mechanism and a plurality of toper ring push-down mechanism. A toper bottom of case assembly welding device, solved because the structure of the spherical top cap subassembly, toper ring and the forked ring that constitutes the awl end is special, lead to assembly, the welding process in the degree of difficulty between spherical top cap subassembly, toper ring and the forked ring great, welding set among the prior art is not suitable for the welded technical problem between spherical top cap subassembly, toper ring and the forked ring.
Description
Technical Field
The utility model belongs to the technical field of the rocket tank, especially, relate to a toper bottom of case assembly welding device.
Background
The tank bottom of the storage tank of the rocket in active service model generally adopts a spherical bottom or ellipsoidal bottom structure form and consists of a top cover, a circular ring and a forked ring, wherein the top cover structure is a single metal plate molded part, and the melon petal profile is spherical or ellipsoidal and can be welded by adopting a conventional TIG welding process by utilizing a special tool. In the development of a new generation manned carrier rocket in China, a storage tank with a conical bottom structure is adopted for the first time, the diameter of the taper is 5 meters, and the storage tank is formed by welding a spherical top cover assembly, a conical ring and a forked ring through annular seams. Wherein, the spherical top cover component is in a concave shape, so the section of the conical bottom looks like M shape. The conical ring in the conical bottom structure is formed by welding 6 conical rolling-bending formed melon petals, and the cone angle is 90 degrees. The forked ring is formed by integrally machining a forging, and the cross section of the forked ring is in an oblique Y shape. In addition, the whole welding thickness of the cone bottom is increased to 15mm, and the structural rigidity and the welding difficulty are increased. The particularity of the cone bottom structure and the increase of the welding thickness lead to great assembly and welding difficulty of the cone bottom. In addition, the prior art method can only meet the assembly welding of the spherical bottom or the elliptical bottom, so a new welding device needs to be developed to complete the welding of the conical bottom.
Disclosure of Invention
In view of this, the utility model aims at providing a toper bottom of case assembly welding device has solved because the special structure of the spherical top cap subassembly, the toper ring and the forked ring that constitute the awl end leads to assembly, the welding process in between the spherical top cap subassembly, toper ring and the forked ring degree of difficulty great, and welding device among the prior art is not suitable for the welded technical problem between spherical top cap subassembly, toper ring and the forked ring.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a conical box bottom assembling and welding method comprises the following steps:
the method comprises the following steps: first welding grooves are respectively arranged at the adjacent end faces to be welded of the conical ring and the forked ring, the two first welding grooves form a first U-shaped groove, and the first U-shaped grooves are arranged in an axisymmetric manner by taking the central line of the gap between the conical ring and the forked ring as an axis;
step two: second welding grooves are respectively arranged at the adjacent end faces to be welded of the conical ring and the spherical top cover assembly, the two second welding grooves form a second U-shaped groove, and the second U-shaped grooves are arranged in an axisymmetric manner by taking the central line of the gap between the conical ring and the spherical top cover assembly as an axis;
step three: assembling the conical ring and the forked ring to be involutory, aligning quadrants between the conical ring and the forked ring, and welding the first U-shaped groove to form a first welding seam;
step four: assembling the conical ring and the spherical top cover assembly, aligning quadrants between the conical ring and the spherical top cover assembly, and welding a second U-shaped groove to form a second welding seam;
the sequence of the first step and the second step can be exchanged.
Further, the width of the groove of the first U-shaped groove is a, a is 18mm-22mm, the width of the platform of the U-shaped groove is b, b is 2mm-4mm, transition fillets are symmetrically arranged at the bottom of the U-shaped groove, the radius of each transition fillet is R, R is 4mm-6mm, an included angle between the inner wall of the left side of the U-shaped groove and the inner wall of the right side of the U-shaped groove is alpha, and alpha is 40-60 degrees.
Furthermore, the truncated edge of the first U-shaped groove is p, and p is 2mm-4 mm.
Further, the first U-shaped groove and the second U-shaped groove have the same structure.
Further, the tapered ring is subjected to allowance milling before the step one, and the operation of allowance milling of the tapered ring comprises the following steps:
step one): measuring the circumferences of the large end and the small end of the conical ring;
step two): comparing the perimeter of the large end of the conical ring with the annular seam of the forked ring, and comparing the perimeter of the small end of the conical ring with the perimeter of a connecting flange of the spherical top cover assembly;
step three): and calculating theoretical milling amount, reserving 1.5mm of welding seam shrinkage, marking milling lines at two ends of the conical ring, and milling allowance according to the milling lines.
Further, the first U-groove welding operation includes the steps of:
step (I): and (3) carrying out positioning welding on the first U-shaped groove:
step (II): performing fixed backing welding on the first U-shaped groove:
step (three): and performing cover surface welding on the first U-shaped groove.
Further, the second U-groove welding operation is the same as the first U-groove welding operation.
Further, the welding method further comprises the following step five: and finishing and repairing macro defects of the first welding seam and the second welding seam, and repairing internal defects of the first welding seam and the second welding seam.
A conical box bottom assembling and welding device comprises a base, a support frame, a stand column structure, a forked ring pressing mechanism, a plurality of spherical top cover component pressing mechanisms and a plurality of conical ring pressing mechanisms;
the forked ring pressing mechanism, the support frame and the upright post structure are all arranged on the upper end surface of the base, an annular support plate capable of supporting the small end of the conical ring is arranged at the top end of the support frame, the upright post structure is arranged on the inner side of the support frame, and the annular support plate and the upright post structure are coaxial;
when a first welding line at the bottom of the conical box is welded, the peripheries of the conical circular ring pressing mechanisms are uniformly arranged on the annular supporting plate, and each conical circular ring pressing mechanism can press the conical circular ring downwards;
when the second welding seam to the toper bottom of the case is welded, will be a plurality of toper ring pushes down the mechanism with the annular support plate split, and is a plurality of ball-type top cap subassembly hold-down mechanism with stand structure axle center circumference align to grid, ball-type top cap subassembly hold-down mechanism one end with stand structure is articulated, the ball-type top cap subassembly hold-down mechanism other end can compress tightly ball-type top cap subassembly and compress tightly.
Furthermore, the forked ring pressing mechanism comprises a plurality of first pressing blocks, a plurality of second pressing blocks and a jacking mechanism capable of limiting the plurality of first pressing blocks and the plurality of second pressing blocks;
the first pressing blocks and the second pressing blocks are the same in quantity, the first pressing blocks are uniformly arranged on the periphery of the axis of the upright column structure, one second pressing block is arranged between every two adjacent first pressing blocks, one first pressing block is meshed with one adjacent second pressing block, the first pressing blocks and the second pressing blocks can move in the radial direction, and the first pressing blocks and the second pressing blocks can press the inner wall of the forked ring through the jacking mechanism;
preferably, each of the first pressing block and the second pressing block is provided with a lower circular seam backing plate, and the lower circular seam backing plate is opposite to the first welding seam;
preferably, a first welding leakage groove is formed in the lower annular seam base plate;
preferably, the jacking mechanism comprises a positioning ring and a plurality of jacking bolts, the inner side of each first pressing block corresponds to one jacking bolt, the inner side of each second pressing block corresponds to one jacking bolt, the positioning ring is arranged on the upper end surface of the base, and the jacking bolts are in threaded connection with the positioning ring;
preferably, the tightening mechanism further comprises a plurality of connecting bolts, each connecting bolt penetrates through the positioning ring, each first pressing block is connected with one connecting bolt, and each second pressing block is connected with one connecting bolt;
preferably, the first pressing blocks and the second pressing blocks are provided with guide structures, each guide structure comprises two oblong holes and two screws, each oblong hole is internally provided with one screw correspondingly, each screw is connected with the base, and the central lines of the two oblong holes are coaxial;
preferably, the conical ring pressing mechanism comprises an upper ring seam backing plate, an adjusting bolt, a stop block and a pressing block capable of pressing the conical ring, the upper ring seam backing plate is opposite to the second welding line, the upper ring seam backing plate is detachably connected with the annular supporting plate, the stop block is detachably connected with the upper end face of the annular supporting plate, the adjusting bolt penetrates through the stop block, the bottom end of the adjusting bolt is rotatably connected with the pressing block, and the adjusting bolt is in threaded connection with the stop block;
preferably, the upper annular seam backing plate is connected with the annular supporting plate through a fastening screw;
preferably, the stop block is connected with the annular support plate through a stop screw;
preferably, a second welding leakage groove is formed in the upper circular seam base plate;
preferably, the spherical top cover assembly pressing mechanism comprises a telescopic rod piece and a positioning plate capable of pressing the spherical top cover assembly, the top end of the telescopic rod piece is hinged with the upright post structure, and the positioning plate is arranged at the bottom end of the telescopic rod piece;
preferably, the telescopic rod is an open-body turnbuckle;
preferably, the number of the first pressing blocks is 6-10;
preferably, the number of the conical ring pressing mechanisms is 8-16;
preferably, the upright post structure comprises an upright post base and an upright post, and the upright post is arranged on the upper end surface of the base through the upright post base;
preferably, the welding device further comprises a positioning shaft which can be connected with the cross positioner for positioning, and the positioning shaft is detachably connected with the lower end face of the base.
Compared with the prior art, a toper bottom of case assembly welding device have following advantage:
a toper bottom of case assembly welding device, to the tailor-welding of the 5 meters diameter awl end structure that rocket storage tank adopted for the first time, the invention has designed a isolated plant suitable for awl end girth welding to set out reasonable assembly welding process scheme and process flow, solved 5 meters diameter awl end assembly, welding technical problem, filled the blank of the big thickness dysmorphism awl end structure manufacturing ability of internal 5 meters diameter. The welding seam quality and the shape and position size precision of the conical box bottom of the rocket tank welded and produced by the method can meet the design index requirements.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic cross-sectional view of a conical box bottom assembly welding device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a conical ring pressing mechanism in the assembly welding device for the bottom of a conical box according to the embodiment of the present invention;
fig. 3 is a top view of a conical box bottom assembling and welding device according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a conical box bottom welded by the conical box bottom assembly welding method according to the embodiment of the present invention;
fig. 5 is a schematic view of a first U-shaped groove structure in a method for assembling and welding a bottom of a conical box according to an embodiment of the present invention.
Description of reference numerals:
1-base 2-column structure; 3-positioning the shaft; 4-a support frame; 41-annular support plate; 5, tightening the bolt; 6-a positioning ring; 7-lower circular seam backing plate; 8-first briquetting; 9-second briquetting; 10-a conical ring pressing mechanism; 11-a telescopic rod; 12-a ball-type top cover assembly; 13-a conical ring; 14-a forked ring; 101-an upper ring seam backing plate; 102-briquetting; 103-a fastening screw; 104-adjusting bolt; 105-a stop block; 106-stop screws; a1 — first weld; a2-second weld.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A conical box bottom assembling and welding method comprises the following steps:
the method comprises the following steps: first welding grooves are respectively arranged at the adjacent end faces to be welded of the conical ring 13 and the forked ring 14, the two first welding grooves form a first U-shaped groove, and the first U-shaped grooves are arranged in an axisymmetric manner by taking the central line of the gap between the conical ring 13 and the forked ring 14 as an axis;
step two: second welding grooves are respectively arranged at the adjacent end faces to be welded of the conical ring 13 and the spherical top cover component 12, the two second welding grooves form a second U-shaped groove, and the second U-shaped grooves are axisymmetrically arranged by taking the central line of the gap between the conical ring 13 and the spherical top cover component 12 as an axis;
step three: assembling a conical ring 13 and a forked ring 14 to be involuted, aligning quadrants between the conical ring 13 and the forked ring 14, and welding the first U-shaped groove to form a first welding line A1, wherein the deviations are less than 0.5 mm;
step four: assembling a conical ring 13 and the spherical top cover assembly 12, aligning quadrants between the conical ring 13 and the spherical top cover assembly 12, and welding a second U-shaped groove to form a second welding line A2, wherein the deviations are less than 0.5 mm;
step five: trimming and repairing macro defects of the first welding seam A1 and the second welding seam A2, and repairing internal defects of the first welding seam A1 and the second welding seam A2;
in this embodiment, the groove width of the first U-shaped groove is a, a is 20mm, the platform width of the U-shaped groove is b, b is 3.4mm, the bottom of the U-shaped groove is symmetrically provided with a transition fillet, the radius of the transition fillet is R, R is 5mm, the included angle between the left inner wall of the U-shaped groove and the right inner wall of the U-shaped groove is α, and α is 45 °. The truncated edge of the first U-shaped groove is p, and p is 3mm, in this embodiment, the first U-shaped groove and the second U-shaped groove have the same structure, and the plate thickness of the to-be-welded member is 13 to 17mm, in this embodiment, 15 mm.
Performing allowance milling on the conical ring 13 before the first step, wherein the allowance milling operation of the conical ring 13 comprises the following steps:
the method comprises the following steps: measuring the circumferences of the large end and the small end of the conical ring 13;
step two: comparing the perimeter of the large end of the conical ring 13 with the circumferential seam of the forked ring 14, and comparing the perimeter of the small end of the conical ring 13 with the perimeter of the connecting flange of the spherical top cover component 12;
step three: and calculating theoretical milling amount, reserving 1.5mm of welding seam shrinkage, marking milling lines at two ends of the conical ring 13, and milling allowance according to the milling lines.
A conical box bottom assembling and welding device is shown in figure 1 and comprises a base 1, a support frame 4, a stand column structure 2, a forked ring pressing mechanism, a plurality of spherical top cover component pressing mechanisms and a plurality of conical ring pressing mechanisms 10;
the forked ring pressing mechanism, the support frame 4 and the upright post structure 2 are all arranged on the upper end surface of the base 1, an annular support plate 41 capable of supporting the small end of the conical ring 13 is arranged at the top end of the support frame 4, the upright post structure 2 is arranged on the inner side of the support frame 4, and the annular support plate 41 and the upright post structure 2 are coaxial;
when a first welding line A1 at the bottom of the conical box is welded, a plurality of conical ring pressing mechanisms 10 are uniformly arranged on the annular supporting plate 41 in a circumferential manner, and each conical ring pressing mechanism 10 can press a conical ring 13;
the number of the conical ring pressing mechanisms 10 is 8-16, and in the embodiment, the number of the conical ring pressing mechanisms 10 is 12;
when a second welding line A2 at the bottom of the conical box is welded, the conical circular ring pressing mechanisms 10 are detached from the annular supporting plate 41, the spherical top cover component pressing mechanisms are uniformly arranged around the axis of the upright post structure 2, one ends of the spherical top cover component pressing mechanisms are hinged with the upright post structure 2, and the other ends of the spherical top cover component pressing mechanisms can press the spherical top cover component 12 to be pressed tightly.
The forked ring pressing mechanism comprises a plurality of first pressing blocks 8, a plurality of second pressing blocks 9 and a jacking mechanism capable of limiting the plurality of first pressing blocks 8 and the plurality of second pressing blocks 9;
the number of the first pressing blocks 8 is the same as that of the second pressing blocks 9, the first pressing blocks 8 are uniformly arranged around the axis of the column structure 2, one second pressing block 9 is arranged between every two adjacent first pressing blocks 8, one first pressing block 8 is meshed with one adjacent second pressing block 9, the first pressing blocks 8 and the second pressing blocks 9 can move radially, and the first pressing blocks 8 and the second pressing blocks 9 can press the inner wall of the forked ring 14 through the jacking mechanism;
6-10 first pressing blocks 8, in this embodiment, 8 first pressing blocks 8 are provided;
each first pressing block 8 and each second pressing block 9 are respectively provided with a lower circular seam backing plate 7, the lower circular seam backing plate 7 is opposite to the first welding line A1, and the lower circular seam backing plate 7 is provided with a first leakage welding groove;
the jacking mechanism comprises a positioning ring 6 and a plurality of jacking bolts 5, each first pressing block 8 corresponds to one jacking bolt 5 on the inner side, each second pressing block 9 corresponds to one jacking bolt 5 on the inner side, the positioning ring 6 is arranged on the upper end surface of the base 1, and the jacking bolts 5 are in threaded connection with the positioning ring 6;
the jacking mechanism further comprises a plurality of connecting bolts, each connecting bolt penetrates through the positioning ring 6, each first pressing block 8 is connected with one connecting bolt, and each second pressing block 9 is connected with one connecting bolt;
as shown in fig. 3, the first press blocks 8 and the second press blocks 9 are provided with guide structures, each guide structure comprises two oblong holes and two screws, each oblong hole is correspondingly provided with one screw, each screw is connected with the base 1, and the center lines of the two oblong holes are coaxial;
as shown in fig. 2, the conical ring pressing mechanism 10 includes an upper seam plate 101, an adjusting bolt 104, a stop block 105 and a pressing block 102 capable of pressing the conical ring 13, the upper seam plate 101 is opposite to the second welding line a2, the upper seam plate 101 is detachably connected with the annular support plate 41, the stop block 105 is detachably connected with the upper end surface of the annular support plate 41, the adjusting bolt 104 penetrates through the stop block 105, the bottom end of the adjusting bolt 104 is rotatably connected with the pressing block 102, and the adjusting bolt 104 is in threaded connection with the stop block 105; the upper circular seam backing plate 101 is connected with the annular supporting plate 41 through a fastening screw 103; the stop block 105 is connected with the annular support plate 41 through a stop screw 106, a second welding leakage groove is formed in the upper annular seam base plate 101, and the small end of the conical circular ring 13 is pressed and pressed tightly by rotating the adjusting bolt 104 to drive the pressing block 102;
the spherical top cover component pressing mechanism comprises a telescopic rod piece 11 and a positioning plate capable of pressing the spherical top cover component 12, the top end of the telescopic rod piece 11 is hinged with the upright post structure 2, and the positioning plate is arranged at the bottom end of the telescopic rod piece 11;
in this embodiment, the retractable rod 11 is an open-body spline bolt;
in this embodiment, the column structure 2 includes a column base 1 and a column, and the column is disposed on the upper end surface of the base 1 through the column base 1;
in this embodiment, welding set still including can be connected the location axle 3 of location with the cross machine of shifting, location axle 3 can be dismantled with the lower terminal surface of base 1 and be connected.
Working mode of the example
(1) Tapered circular ring allowance milling
After the splicing welding of the conical ring 13 is completed, the circumferences of the large end and the small end of the conical ring 13 are measured, the measured circumferences of the large end and the small end of the conical ring 13 are compared with the circumferential seams of the forked ring 14 and the circumferential seams of the connecting flange spliced with the conical ring 13, the theoretical milling amount is calculated, 1.5mm of welding seam shrinkage is reserved, milling lines at the two ends of the conical ring 13 are drawn, and allowance is milled according to the milling lines.
(2) Assembling forked rings and conical rings
Firstly, integrally hoisting the welding device to a cross positioner platform, and fixing the base 1 and the positioner platform by screw connection by using a pressing plate. And (3) hoisting the forked ring 14, pressing the outer end face of the forked ring 14 by using a pressing plate, and simultaneously tightly supporting the first pressing block 8 and the second pressing block 9 to ensure that the lower annular seam backing plate 7 is tightly attached to the forked ring 14. And hoisting the conical ring 13 to ensure that the conical ring 13 is aligned with the quadrant line of the forked ring 14. The upper part is provided with a conical ring pressing mechanism 10, and a pushing force is applied to the small end of the conical ring 14, so that the conical ring 14 is jointed with the forked ring 15.
(3) Welding Y-rings and conical rings
After the conical ring 13 and the forked ring 14 are assembled, large staggered joints still exist in local parts, in consideration of rigidity difference of the conical ring 13 and the forked ring 14, in order to prevent the conical ring 13 from being heated and outwards expanded and deformed during welding, a jack is used for uniformly positioning the conical ring 13 and the forked ring in sections by manual TIG welding at one side of a ring in an area to be welded, then bottom is made by manual TIG whole circle, and finally two layers of cover surfaces are made by manual MIG welding.
The first U-groove welding operation comprises the steps of:
the method comprises the following steps: carry out the tack welding to first U-shaped groove, use spiral jack to apply the extrusion force to 13 one sides of toper ring before the tack welding, jack one side top is on the strengthening rib of 13 melon lamella of toper ring, and the opposite side passes through the wooden extension bar of square cross-section and passes on the angle steel section bar frame of power to equipment observation platform, and then has solved the jack and has not had the point of force problem:
because the welding seam is a circular closed welding seam, the contraction of the welding seam of the welding part firstly can lead to the enlargement of the gap of the symmetrical side, 8 points are uniformly selected for segmented positioning during the positioning, and the positioning points are firstly selected from the area with larger staggered joint so as to ensure the uniform distribution of the gap and the staggered joint. In consideration of the characteristics of large thickness and high rigidity of the product, the heat input is controlled during positioning to ensure one-time penetration, so that the phenomenon that a welding seam is cracked due to overlarge stress in the subsequent welding process is avoided. In order to prevent the circular arc from shaking in the process of turning to the flat welding angle, welding at a 45-degree transverse welding position;
step two: the first U-shaped groove is subjected to fixed backing welding, the conical ring 13 and the forked ring 14 are preliminarily fixed in a segmented positioning mode, the relative position between the conical ring 13 and the forked ring 14 cannot be greatly staggered, and the staggered joints and gaps can be uniformly distributed. After the positioning is finished in a segmented mode, backing welding is continuously carried out on the whole welding seam circle by adopting TIG welding, the current is properly increased by adopting alternating current welding and helium-argon mixed shielding gas, and the back welding leakage forming is ensured:
step three: and performing facing welding on the first U-shaped groove, wherein the thickness of a product is considered to be thick, the required welding wire filling amount is large, and meanwhile, the welding efficiency of TIG welding is low, so MIG welding is adopted during facing welding. The welding power supply adopts an Invision 450Mpa MIG power supply produced by Miller company, and can realize an integrated pulse function by matching with an S-74Mpa Plus four-wheel wire feeder, namely, the output power of the welding machine is matched with the wire feeding speed by setting the wire feeding speed on the wire feeder and automatically adjusting other parameters. And filling by adopting two layers of cover surfaces, wherein the cover surface welding of the first layer is 45-degree transverse welding, and the cover surface welding of the second layer is flat welding.
(4) Assembly ball-type top cap subassembly
And (3) turning the conical ring 13 to a horizontal position, detaching the conical ring pressing mechanism 10, hoisting the spherical top cover assembly 12, and ensuring that the spherical top cover assembly 12 is aligned with a quadrant line of the small end of the conical ring 13, wherein the quadrant deviation is less than 0.5 mm. The end face of the spherical top cover component 12 is pressed down by the telescopic rod 11, so that the spherical top cover component 12 is jointed with the small end welding seam of the conical ring 13. The connection flange end face on the spherical top cover component 12 is ensured to be horizontal through a level ruler in the installation process.
(5) Welding ball-type top cap assembly and ring
The welding also adopts TIG positioning, priming and MIG two-layer facing technology.
The second U-groove welding operation comprises the steps of:
the method comprises the following steps: and the second U-shaped groove is subjected to positioning welding, and because the small end seam has a staggered joint after assembly, the TIG welding can not be adopted for direct positioning because no external pressure tool is provided, the convex part of the circular ring is extruded by means of an auxiliary tool, the local staggered joint is eliminated, and the positioning can be finished. And (3) turning the cone bottom to enable the small end circular seam to be in an overhead welding position, adjusting the screw jack to a proper height by using the cushion assisting block, enabling the screw jack to vertically upwards prop against a region with serious deformation and large staggered joint of the small end of the circular ring, continuously applying a staring force until the staggered joint of the welding seam is approximately eliminated, and then positioning by adopting TIG welding alternating current filler wire, wherein the positioning length is 50-150 mm, and the positioning is performed completely at one time. After one part is fixed, the cone bottom is rotated, and the whole circle of sectional positioning is finished by continuously adopting a mode of locally eliminating staggered joints:
step two: and performing fixed backing welding on the second U-shaped groove, wherein the backing welding adopts an alternating current TIG (tungsten inert gas) and filler wire welding mode, and performs backing in a whole circle, so that the current is increased, and the formation of back weld leakage is ensured. Welding position is close 45 horizontal welding, and during the welding, the welder is located supplementary ladder platform, and it is rotatory to drive the awl end through the machine of shifting, guarantees to accomplish whole circle welding seam welding under the unchangeable condition in welder position:
step three: performing cover welding on the second U-shaped groove, welding the same large circular seam on the cover, adopting MIG two-layer cover welding, and turning by a cross positioner to ensure that the welding position is flat welding;
(6) conical bottom lower frame, weld seam trimming and defect removing and repairing
After the conical bottom is welded, the conical bottom is hoisted to a lower frame by using a crown block and a four-hook hanger, and then the conical bottom is installed on the upper frame and is clamped and fixed on another set of cross positioner to carry out welding seam repair and defect removal and repair.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. The utility model provides a toper bottom of case assembly welding device which characterized in that: the device comprises a base (1), a support frame (4), an upright column structure (2), a forked ring pressing mechanism, a plurality of spherical top cover component pressing mechanisms and a plurality of conical ring pressing mechanisms (10);
the forked ring pressing mechanism, the supporting frame (4) and the upright post structure (2) are all arranged on the upper end face of the base (1), an annular supporting plate (41) capable of supporting the small end of the conical ring (13) is arranged at the top end of the supporting frame (4), the upright post structure (2) is arranged on the inner side of the supporting frame (4), and the annular supporting plate (41) and the upright post structure (2) are coaxial;
when a first welding line (A1) at the bottom of the conical box is welded, a plurality of conical ring pressing mechanisms (10) are uniformly arranged on the annular supporting plate (41) in a circumferential manner, and each conical ring pressing mechanism (10) can press the conical ring (13);
when welding the second welding seam (A2) to the toper bottom of the case, it is a plurality of toper ring pushes down mechanism (10) with annular backup pad (41) split, and is a plurality of ball-type top cap subassembly hold-down mechanism with stand structure (2) axle center circumference align to grid, ball-type top cap subassembly hold-down mechanism one end with stand structure (2) are articulated, the ball-type top cap subassembly hold-down mechanism other end can compress tightly ball-type top cap subassembly (12) and compress tightly.
2. The conical box bottom assembly welding device according to claim 1, characterized in that: the forked ring pressing mechanism comprises a plurality of first pressing blocks (8), a plurality of second pressing blocks (9) and a jacking mechanism capable of limiting the first pressing blocks (8) and the second pressing blocks (9);
it is a plurality of first briquetting (8) and a plurality of second briquetting (9) quantity is the same, and is a plurality of first briquetting (8) with column structure (2) axle center circumference align to grid sets up, two adjacent all set up one between first briquetting (8) second briquetting (9), one first briquetting (8) and an adjacent second briquetting (9) intermeshing, it is a plurality of first briquetting (8) and a plurality of second briquetting (9) homoenergetic radial movement are a plurality of first briquetting (8) and a plurality of second briquetting (9) pass through the tight mechanism in top can compress tightly fork shape ring (14) inner wall.
3. The conical box bottom assembly welding device according to claim 2, characterized in that: each first pressing block (8) and each second pressing block (9) are respectively provided with a lower circular seam backing plate (7), and the lower circular seam backing plates (7) are opposite to the first welding line (A1).
4. The conical box bottom assembly welding device according to claim 3, characterized in that: and a first welding leakage groove is formed in the lower annular seam base plate (7).
5. The conical box bottom assembly welding device according to claim 2, characterized in that: the jacking mechanism comprises a positioning ring (6) and a plurality of jacking bolts (5), each of which is corresponding to one of the inner sides of the first pressing block (8), the jacking bolts (5) and each of which is corresponding to one of the inner sides of the second pressing block (9), the jacking bolts (5), the positioning ring (6) is arranged on the upper end surface of the base (1), and the jacking bolts (5) are in threaded connection with the positioning ring (6).
6. The conical box bottom assembly welding device according to claim 5, characterized in that: the jacking mechanism further comprises a plurality of connecting bolts, each connecting bolt penetrates through the positioning ring (6), each first pressing block (8) is connected with one connecting bolt, and each second pressing block (9) is connected with one connecting bolt.
7. The conical box bottom assembly welding device according to any one of claims 2 to 6, characterized in that: the first pressing blocks (8) and the second pressing blocks (9) are provided with guide structures, each guide structure comprises two long round holes and two screws, each long round hole is internally provided with one corresponding screw, the screws are connected with the base (1), and the center lines of the two long round holes are coaxial.
8. The conical box bottom assembly welding device according to claim 1, characterized in that: toper ring pushes down mechanism (10) includes last annular gap backing plate (101), adjusting bolt (104), stop block (105) and can compress tightly lower briquetting (102) of toper ring (13), go up annular gap backing plate (101) with second welding seam (A2) is just right, go up annular gap backing plate (101) with annular support plate (41) can be dismantled and be connected, stop block (105) with annular support plate (41) up end can be dismantled the connection, adjusting bolt (104) run through stop block (105), adjusting bolt (104) bottom with briquetting (102) rotate down and connect, adjusting bolt (104) with stop block (105) threaded connection.
9. The conical box bottom assembly welding device according to claim 8, characterized in that: the upper annular seam backing plate (101) is connected with the annular supporting plate (41) through a fastening screw (103).
10. The conical box bottom assembly welding device according to claim 8, characterized in that: the stop block (105) is connected with the annular support plate (41) through a stop screw (106).
11. The conical box bottom assembly welding device according to claim 8, characterized in that: and a second welding leakage groove is formed in the upper annular seam base plate (101).
12. The conical box bottom assembly welding device according to claim 7, characterized in that: ball-type top cap subassembly hold-down mechanism includes scalable member (11) and can compress tightly the locating plate of ball-type top cap subassembly (12), scalable member (11) top with stand structure (2) are articulated, the locating plate sets up scalable member (11) bottom.
13. The conical box bottom assembly welding device according to claim 12, characterized in that: the telescopic rod piece (11) is an open-body turnbuckle.
14. The conical box bottom assembly welding device according to claim 7, characterized in that: 6-10 first pressing blocks (8) are arranged.
15. The conical box bottom assembly welding device according to claim 8, characterized in that: the number of the conical ring pressing mechanisms (10) is 8-16.
16. The conical box bottom assembly welding device according to claim 8, characterized in that: the upright post structure (2) comprises an upright post base (1) and an upright post, wherein the upright post is arranged on the upper end surface of the base (1) through the upright post base (1).
17. The conical box bottom assembly welding device according to claim 8, characterized in that: the welding device further comprises a positioning shaft (3) which can be connected with the cross positioner for positioning, and the positioning shaft (3) is detachably connected with the lower end face of the base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922410085.1U CN211465131U (en) | 2019-12-28 | 2019-12-28 | Assembly welding device for conical box bottom |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922410085.1U CN211465131U (en) | 2019-12-28 | 2019-12-28 | Assembly welding device for conical box bottom |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977111A (en) * | 2019-12-28 | 2020-04-10 | 天津航天长征火箭制造有限公司 | Assembly welding method and device for conical box bottom |
| CN114799725A (en) * | 2022-05-18 | 2022-07-29 | 重庆钢铁股份有限公司 | Repair method for leakage of lower valve box body of blast furnace equipment |
-
2019
- 2019-12-28 CN CN201922410085.1U patent/CN211465131U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977111A (en) * | 2019-12-28 | 2020-04-10 | 天津航天长征火箭制造有限公司 | Assembly welding method and device for conical box bottom |
| CN110977111B (en) * | 2019-12-28 | 2023-10-27 | 天津航天长征火箭制造有限公司 | Conical box bottom assembling and welding method and device |
| CN114799725A (en) * | 2022-05-18 | 2022-07-29 | 重庆钢铁股份有限公司 | Repair method for leakage of lower valve box body of blast furnace equipment |
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