CN211638630U - Conical ring tailor-welding device - Google Patents

Abstract

The utility model provides a toper ring welding device, welding device include base structure, pressure beam structure, bearing structure, mould child, mobilizable frame construction and a plurality of key structure. A toper ring tailor-welding device, solved because toper ring structure is special, welding thickness is big, structural rigidity leads to toper ring tailor-welding time toper melon lamella assembly welding degree of difficulty big and prior art device inapplicable technical problem greatly.

Description

Conical ring tailor-welding device

Technical Field

The utility model belongs to the technical field of the rocket tank, especially, relate to a toper ring tailor-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 transition ring, wherein the circular ring is formed by welding the split-type rocket, the circular ring is assembled and fixed through a special tool during the split-type welding, and the conventional. In the development of a new generation manned carrier rocket in China, the rear bottom of a first-stage combustion agent box adopts a five-meter-diameter conical bottom structure for the first time, wherein a conical ring which is an important component of the conical bottom structure is formed by welding 6 conical rolling-bending-formed melon petals in a splicing manner, the cone angle of each melon petal is 90 degrees, the longitudinal seam of each melon petal is a linear welding seam, the thickness of the welding area reaches 15mm, and the welding thickness is far higher than that of the welding thickness range of 4-10mm of the existing model products. The assembly and welding difficulty of the conical melon petal in the ring splicing welding process is very high due to the particularity of the conical ring structure and the increase of the welding thickness, and the splicing welding of the spherical bottom or the ellipsoidal bottom ring can only be met by the prior art method, so that a new welding process device needs to be developed to complete the splicing welding of the conical ring.

Disclosure of Invention

In view of this, the utility model aims at providing a toper ring tailor-welding device has solved because toper ring structure is special, welding thickness is big, the structural rigidity leads to toper ring tailor-welding toper melon lamella assembly welding degree of difficulty big and prior art device inapplicable technical problem greatly when welding.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a splicing welding method for a conical ring comprises the following steps:

the method comprises the following steps: the two groups of conical melon petals can form a conical ring structure, each group comprises three conical melon petals, the two conical melon petals in each group are subjected to butt welding, and the two welded conical melon petals are first components;

step two: butt welding the remaining conical melon petal in each group with the first component in the same group, wherein one conical melon petal is welded with one first component to form a second component;

step three: and butt welding the two groups of second assemblies, wherein the two welded second assemblies are conical rings.

Furthermore, each conical melon petal is formed by roll bending.

Further, the butt welding process comprises the following steps:

the method comprises the following steps: welding grooves are respectively arranged at the adjacent end faces to be welded of the two workpieces to be welded, the two welding grooves form a U-shaped groove, and the U-shaped grooves are arranged in an axisymmetric manner by taking the central line of the gap between the two workpieces to be welded as an axis;

step two: and sequentially carrying out first-layer bottoming welding, second-layer cover surface welding and third-layer cover surface welding in the U-shaped groove from bottom to top.

Furthermore, the truncated edge of the U-shaped groove is p, and p is 10mm-12 mm; the width of the U-shaped groove is a, a is 14mm-22mm, the width of the platform of the U-shaped groove is b, b is 8mm-12mm, transition fillets are symmetrically arranged at the bottom of the U-shaped groove, the radius of each transition fillet is R, and R is 3mm-5 mm.

A conical ring splicing and welding device comprises a base structure, a pressing beam structure, a supporting structure, a mold tire, a movable frame structure and a plurality of key structures, wherein the upper end surface of the mold tire can be attached to the inner wall of a conical melon petal;

the pressing beam structure comprises two pressing beams which are arranged in parallel, the end part of the same side of the two pressing beams is hinged with the end part of one end of the base structure through a joint structure, the mould is arranged on the upper end surface of the base, the base structure is connected with the frame structure through the supporting structure, a plurality of key structures are symmetrically arranged on the two pressing beams, one key structure on one pressing beam is opposite to one key structure on the other pressing beam, and a welding gun can be accommodated between the two opposite key structures;

the key structure comprises a key pressing plate, a positioning rod, a stud, a butterfly nut, a jacking screw and a first ear plate, wherein one end of the key pressing plate can compress a conical melon petal, the other end of the key pressing plate is hinged to the positioning rod, a long round hole is formed in the positioning rod, the stud penetrates through the long round hole, the stud is connected with the upper end face of the pressing beam, the stud passes through the butterfly nut and is right for the positioning rod to compress, the middle of the key pressing plate is connected with the pressing beam through the first ear plate, the key pressing plate is hinged to the first ear plate, the jacking screw is in threaded connection with the pressing beam, and the jacking screw can jack the key pressing plate and the hinged end portion of the positioning rod.

Furthermore, the supporting structure comprises a chain block, a supporting column structure and a supporting seat structure;

the supporting column structure is arranged between the chain block and the supporting seat structure, the height of the supporting seat structure is smaller than that of the supporting column structure, the top end of the supporting column structure is hinged to the base structure, the bottom end of the supporting column structure and the bottom end of the supporting seat structure are both connected with the frame structure, one end of the chain block is hinged to the frame structure, and the other end of the chain block is hinged to the base structure.

Furthermore, the supporting seat structure comprises two supports arranged in parallel and two supporting plates capable of supporting the base structure, the supporting plates are arranged on the upper end faces of the supports, the two supporting plates are located on the same plane, and the two supports are arranged on the upper end face of the frame structure.

Further, the key structure still includes roll adjustment mechanism, roll adjustment mechanism includes the housing screw supporting seat and can carry out longitudinal positioning's housing screw to the toper melon lamella, the housing screw supporting seat sets firmly mould child one end tip, housing screw runs through the housing screw supporting seat, housing screw with housing screw supporting seat threaded connection.

Further, the tailor-welding device still includes a plurality of compression screw, and is a plurality of the compression screw symmetry sets up two on the pressure roof beam, it is same two adjacent compression screw intervals on the pressure roof beam equal, each compression screw all with pressure roof beam threaded connection, each compression screw bottom all is equipped with can be right the briquetting that the non-welding zone of toper melon lamella compressed tightly.

Furthermore, the tailor-welding device also comprises a connecting plate, one end of the connecting plate is detachably connected with the two pressing beams, and the other end of the connecting plate is detachably connected with the base structure;

preferably, the supporting structure further comprises two connecting rods, and when the base structure is horizontally arranged, the end part of each pressing beam far away from the hinged end is connected with the frame structure through one connecting rod;

preferably, the distance between two adjacent key structures on the same pressing beam is equal;

preferably, the pillar structure comprises two pillars arranged in parallel, the bottom ends of the two pillars are connected with the frame structure, and the top ends of the two pillars are hinged with the base structure through a connecting lug;

preferably, the section structure of the key pressing plate is V-shaped, and the opening angle of the key pressing plate is 100-120 degrees;

preferably, the joint structure comprises a joint and a connecting joint, the joint is hinged to the connecting joint, the joint is connected with the two pressing beams, and the connecting joint is connected with the base structure;

preferably, the frame structure comprises a frame body, two directional wheels, two brake wheels and a plurality of adjustable support legs, wherein the two directional wheels are symmetrically arranged on the lower end surface of the frame body from left to right, the two brake wheels are symmetrically arranged on the lower end surface of the frame body from left to right, and the plurality of adjustable support legs are symmetrically arranged on the left side and the right side of the frame body;

preferably, the number of the adjustable supporting feet is six.

Compared with the prior art, a toper ring tailor-welding device have following advantage:

a toper ring tailor-welding device, tailor-welding device in this scheme has carried out new structural design according to toper ring's structure, belongs to the first application at internal trade, and then has formed the tailor-welding method that is applicable to toper ring through developing new process flow, realization that can be complete is to the tailor-welding of toper ring, the welding seam quality and the welding deformation of toper ring obtain effective control.

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 flow chart of a method for tailor-welding a tapered ring according to an embodiment of the present invention

Fig. 2 is a schematic view of a horizontal state of a base structure in the tapered ring tailor-welding device according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of FIG. 2;

fig. 4 is a schematic diagram illustrating an inclined state of a base structure in the tapered ring tailor-welding device according to an embodiment of the present invention;

fig. 5 is a side view of a conical ring tailor-welding device according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a U-shaped groove structure in a method for tailor-welding tapered rings according to an embodiment of the present invention.

Description of reference numerals:

1-pressing a beam; 2-a linker; 3-a compression screw; 4-a compression screw supporting seat; 5-connecting a joint; 6-molding; 7-a base structure; 8-a connecting rod; 9-connecting lugs; 10-upright post; 11-a support seat; 12-a frame body; 13-an orientation wheel; 14-chain block; 15-brake wheel; 16-a connecting plate; 17-adjustable feet; 18-a stud; 19-a wing nut; 20-positioning rods; 21-tightening the screw; 22-key press plate; 23-a first ear plate; 24-a compression screw; 25-briquetting; 26-conical melon petals.

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 method for tailor-welding a tapered ring, as shown in FIG. 1, comprises the following steps:

the method comprises the following steps: two groups of conical melon petals 26 capable of forming a conical ring structure, wherein each group comprises three conical melon petals 26, two conical melon petals 26 in each group are subjected to butt welding, and the two welded conical melon petals 26 are first components;

step two: butt welding the remaining one of the conical melon petals 26 in each group with the first component in the same group, wherein one of the conical melon petals 26 is welded with one of the first components to form a second component;

step three: and butt welding the two groups of second assemblies, wherein the two welded second assemblies are conical rings.

In this embodiment, each of the tapered melon petals 26 is roll-formed.

In this embodiment, the butt welding process includes the following steps:

the method comprises the following steps: welding grooves are respectively arranged at the adjacent end faces to be welded of the two workpieces to be welded, the two welding grooves form a U-shaped groove, and the U-shaped grooves are arranged in an axisymmetric manner by taking the central line of the gap between the two workpieces to be welded as an axis;

step two: and sequentially carrying out first-layer bottoming welding, second-layer cover surface welding and third-layer cover surface welding in the U-shaped groove from bottom to top.

The wall thickness of the conical melon petal is p, the truncated edge of the U-shaped groove is 10mm-12 mm; the groove width of U-shaped groove is a, a equals 14mm-22mm, the platform width of U-shaped groove is b, b equals 8mm-12mm, U-shaped groove bottom symmetry is equipped with the transition fillet, the radius of transition fillet is R, R equals 3mm-5mm, in this embodiment, a equals 18mm, b equals 12mm, R equals 5mm, p equals 12mm, equal 15mm, the blunt limit thickness of U-shaped groove has been improved in this scheme, carry out single face three layer welding in the U-shaped groove, cooperate the accurate control of welding process parameter simultaneously, make every layer of welding seam only need one welding seam just can cover whole groove width, realize the accuse shape and the controllability regulation that the welding seam takes shape, guarantee under the welding seam quality and the joint performance, furthest improves welding efficiency.

A conical ring tailor-welding device is shown in figure 2 and comprises a base structure 7, a pressure beam structure, a supporting structure, a mould tire 6, a movable frame structure and a plurality of key structures;

the pressing beam structure comprises two pressing beams 1 which are arranged in parallel, the end parts of the same sides of the two pressing beams 1 are hinged with the end part of one end of a base structure 7 through a joint structure, the upper end surface of a mould 6 can be attached to the inner wall of a conical melon petal 26, the mould 6 is arranged on the upper end surface of the base, the base structure 7 is connected with a frame structure through a supporting structure, a plurality of key structures are symmetrically arranged on the two pressing beams 1, one key structure on one pressing beam 1 is opposite to one key structure on the other pressing beam 1, a welding gun can be accommodated between the two opposite key structures, and the distance between the two adjacent key structures on the same pressing beam 1 is equal;

in this embodiment, the joint structure includes a joint 2 and a connecting joint 5, the joint 2 is hinged to the connecting joint 5, the joint 2 is connected to two pressing beams 1, and the connecting joint 5 is connected to a base structure 7;

in this embodiment, the frame structure includes frame body 12, two directional wheels 13, two brake wheels 15 and a plurality of adjustable stabilizer blade 17, two directional wheels 13 bilateral symmetry set up terminal surface under frame body 12, two brake wheels 15 bilateral symmetry set up terminal surface under frame body 12, a plurality of adjustable stabilizer blade 17 symmetries set up the left and right sides at frame body 12, in this embodiment, adjustable stabilizer blade 17 is six, through two directional wheels 13 and two brake wheels 15, in order to make things convenient for whole device to carry out position shifting. The frame 11 is further provided with 6 adjustable support legs 17, when the frame needs to be fixed, the frame can be jacked up and fixed through adjusting the adjustable support legs 17, and the adjustable support legs 17 are adjustable support legs in the prior art.

As shown in fig. 3, the key structure includes a key pressing plate 22, a positioning rod 20, a stud 18, a butterfly nut 19, a tightening screw 21, a first ear plate 23, one end of the key pressing plate 22 can press a conical melon petal 26, the other end of the key pressing plate 22 is hinged to the positioning rod 20, a long hole is formed in the positioning rod 20, the stud 18 penetrates through the long hole, the stud 18 is connected with the upper end face of the pressure beam 1, the stud 18 presses the positioning rod 20 through the butterfly nut 19, the middle of the key pressing plate 22 is connected with the pressure beam 1 through the first ear plate 23, the key pressing plate 22 is hinged to the first ear plate 23, the tightening screw 21 is in threaded connection with the pressure beam 1, the tightening screw 21 can tighten the end portion of the key pressing plate 22 hinged to the positioning rod 20, the section structure of the key pressing plate 22 is V-shaped.

The gap between the key pressing plate 22 and the mould 6 can be adjusted by adjusting the butterfly nut 19 so as to adapt to the assembly of products with different thicknesses. The pressing beam 1 is provided with a jacking screw 21, the jacking screw 21 applies jacking force to the key pressing plate 22, and the lever principle is utilized to realize the compression of a product to be welded. In addition, a pressing block 25 is welded at the lower end of the pressing screw 24, the conical melon petal 26 is pushed downwards to be fixed by rotating the pressing screw 24, the stress area is increased by the pressing block 25, and the conical melon petal 26 is prevented from being mechanically damaged;

the supporting structure comprises a chain block 14, a supporting column structure and a supporting seat structure 11, the supporting column structure is arranged between the chain block 14 and the supporting seat structure 11, the supporting seat structure 11 is highly smaller than the supporting column structure, the top end of the supporting column structure is hinged to the base structure 7, the bottom end of the supporting column structure and the bottom end of the supporting seat structure 11 are both connected with the frame body 12, one end of the chain block 14 is hinged to the frame body 12, and the other end of the chain block 14 is hinged to the base structure 7.

Supporting seat structure 11 includes two supports that set up side by side and two backup pads that can support base structure 7, and the backup pad setting is at the support up end, and in this embodiment, backup pad and horizontal plane contained angle are 35, and two backup pads are located the coplanar, and two supports set up at frame body 12 up end, and bearing structure still includes two connecting rods 8, and when base structure 7 level set up, the tip that the hinged end was kept away from to each compression beam 1 all is connected with frame body 12 through a connecting rod 8.

The key structure still includes roll adjustment mechanism, and roll adjustment mechanism includes housing screw supporting seat 4 and can carry out longitudinal positioning's housing screw 3 to toper melon lamella 26, and housing screw supporting seat 4 sets firmly at 6 one end tip of mould child, and housing screw 3 runs through housing screw supporting seat 4, housing screw 3 and housing screw supporting seat 4 threaded connection.

The tailor-welding device further comprises 22 compression screws 24, wherein the 22 compression screws 24 are symmetrically arranged on the two pressing beams 1, the distance between every two adjacent compression screws 24 on the same pressing beam 1 is equal, each compression screw 24 is in threaded connection with the pressing beam 1, and a pressing block 25 capable of pressing a conical melon-petal 26 non-welding area is arranged at the bottom of each compression screw 24.

The tailor-welding device further comprises a connecting plate 16, one end of the connecting plate 16 is connected with the two pressure beams 1 through bolts, and the other end of the connecting plate 16 is connected with the base structure 7 through bolts;

the pillar structure comprises two pillars 10 which are arranged in parallel, the bottom ends of the two pillars 10 are connected with the frame body 12, and the top ends of the two pillars 10 are hinged with the base structure 7 through a connecting lug 9;

working mode of the example

Firstly, the milling of the welding edge allowance is carried out under the state of a single conical melon petal 26. And (3) with the edges of the outermost ribs on the left side and the right side of the conical melon petal 26 as a reference, reserving 1.5mm of weld joint shrinkage on a single side, marking out an actual milling line, and milling out the allowance except the milling line by using a wallboard edge milling machine.

And (3) manually chamfering the longitudinal joint welding edge of the conical melon petal 26 by using a pneumatic milling cutter, wherein the chamfering is a special U-shaped chamfering with a long truncated edge, as shown in figure 6, and then cleaning and polishing the upper surface, the lower surface and the end surface of the welding area by using a polishing brush or a broach to remove the surface oxide film. The tailor-welding device can meet two states of horizontal welding and climbing welding.

(1) Step-welding process in tailor welding method

The welding between two toper melon lamella 26 is 1V1 toper melon lamella welding, and the welding mode is horizontal flat welding, and horizontal position welding, with the help of toper ring tailor-welding set, as shown in fig. 2. Adjust the mould child 6 and the base 7 of device to horizontal position at first, hoist two toper melon lamella 26 in proper order to mould child 6 on, utilize 3 longitudinal displacement of adjusting toper melon lamella 26 of housing screw, guarantee that the theoretical mill tangent line of two toper melon lamella 26 main aspects aligns, the deviation is not more than 0.5 mm. The non-welding area of the conical melon petal 26 is fixed by the compression screw 24 on the compression beam 1, so that the conical melon petal 26 is prevented from vibrating. The positions on two sides of the central line of the welding seam are compressed by utilizing two rows of key pressing plates 22 which are closely arranged, and the distance between the two opposite key pressing plates is 50mm so as to ensure that enough space is reserved for accommodating the welding gun. And (3) checking gaps and staggered joints within 50mm above and below the large end and the small end of the longitudinal joint of the conical melon flap 26, wherein the gaps are required to be not more than 0.5mm, the staggered joints are not more than 0.5mm, the gaps are required to be not more than 1mm at other positions, and the staggered joints are not more than 1 mm.

And welding after the assembly is finished. The welding process adopts a single-face three-layer automatic TIG welding method of 'first-layer bottoming welding, second-layer capping welding and third-layer capping welding', the back part of the TIG welding process is supported by a backing plate with a welding leakage groove, the backing plate is provided with a welding leakage forming groove, the width of the welding leakage groove is 20mm, the depth of the welding leakage groove is 2mm, and the bottom part of the welding leakage groove adopts R1 round corner transition. The welding method can realize single-side welding and double-side forming without back cover welding, wherein helium arc direct current welding and no wire filling are adopted for the first layer of back cover welding, helium and argon mixed protection pulse alternating current welding and wire filling are adopted for the cover surface welding, and two layers of cover surface welding are adopted for ensuring the front forming of a welding seam. The backing weld bead must be welded through, the first layer of cover surface welding increases the welding heat input, and good fusion with the front layer weld bead and the two side walls is ensured. The second layer of cover surface is welded shallowly and widely, and the transition to the base metal rings on the two sides is guaranteed.

Before the first layer of backing welding is carried out, firstly, the direct-current helium arc is adopted for positioning welding, then, the current is increased for backing welding, and the back penetration is ensured; changing a welding program, replacing a nozzle and a tungsten electrode, filling welding wires, adjusting the position of a wire feeding nozzle, and carrying out two-layer cover surface welding, wherein the welding width of the cover surface of the second layer is wider than that of the first layer bottoming welding, so that a fusion line is prevented from being overlapped, and the width of the whole groove is ensured to be covered. After welding, the two pressing beams 1 are slowly hoisted and fixed by using a crown block, then the product is hoisted and put on the shelf by using the crown block, a four-hook hanger and a bow-shaped clamp, the next two conical melon petals 26 are welded, and the butt welding of the two groups of first assemblies adopts the same method.

(2) Step two welding process of tailor welding method

First subassembly and a toper melon lamella 26 weld for 2V1 toper melon lamella welding, because toper melon lamella 26 main aspects occupation space is great, if continue to adopt horizontal position welding, will need to be done the very high very big just can satisfy the space requirement of frock, corresponding welding position also can be high from ground, the operation of not being convenient for, consequently, adopted the mode of climbing welding when 2V1 toper melon lamella 26 welds.

Firstly, two connecting rods 8 connected with two pressing beams 1 are dismantled, then a mould tire 6 and a base 7 are adjusted to 35 degrees through a chain block 3, as shown in fig. 4, the base structure 7 takes two upright posts 10 as fulcrums, the mould tire 6 is lifted by a chain block 14 at one end of the mould tire 6 by utilizing the lever principle, and the other end of the mould tire falls on a supporting seat 11.

The step is compressed tightly with the welding of first subassembly in the assembly, hoists toper melon lamella 26 to the welding position in proper order, utilizes housing screw 3 to guarantee that the theoretical groove of toper melon lamella 26 main aspects aligns, compresses tightly key clamp plate 22 and the compression screw 24 of both sides, and toper melon lamella 26 main aspects adopts the lift dolly to carry out the auxiliary fixation, prevents that toper melon lamella 26 dead weight is too big to influence the welding seam to closing.

The welding method is the same as that of the first assembly, except that the second assembly adopts 35-degree climbing welding and adopts a variable polarity TIG automatic welding system which mainly comprises a gantry, a welding manipulator, a positioner, a man-machine console and the like. By adopting an automatic welding program, key parameters such as welding speed and the like can be controlled more quantitatively, fine control of welding seam heat input is realized, and the centering performance of a welding gun walking track and a welding seam is ensured by teaching programming control of a welding robot on the welding gun track and posture.

(3) Step three welding process of tailor welding method

The welding between two second subassemblies is 3V3 toper melon lamella welding, and 3V3 toper melon lamella 26 welding is same 35 climbing welding, and 2 are welded altogether to 3V3 welding seams, and the assembly is carried out, is welded in the same order. Because two seams need to be welded to the 3V3 conical melon petal 26, when one of the welding seams is assembled, the other welding seam is in a free state, and the welding deformation is uncontrollable, after the two third components are assembled, the other welding seam is manually positioned, the positioning positions are the large end and the small end of the conical melon petal 26, and the positioning length is about 50 mm. The welding method is the same as that of the 2V1 conical melon-shaped flap 26.

As shown in fig. 2 and 4, when the conical melon petal 26 is assembled, the other sides of the pressing beam 1 and the base structure 7 are connected through the connecting plate 16.

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 (13)

1. The utility model provides a toper ring tailor-welding device which characterized in that: the device comprises a base structure (7), a pressing beam structure, a supporting structure, a mould tire (6) with the upper end surface capable of being attached to the inner wall of a conical melon petal (26), a movable frame structure and a plurality of key structures;

the pressing beam structure comprises two pressing beams (1) which are arranged in parallel, the end parts of the same sides of the two pressing beams (1) are hinged with the end part of one end of the base structure (7) through a joint structure, the mould (6) is arranged on the upper end surface of the base structure, the base structure (7) is connected with the frame structure through the supporting structure, a plurality of key structures are symmetrically arranged on the two pressing beams (1), one key structure on one pressing beam (1) is opposite to one key structure on the other pressing beam (1), and a welding gun can be accommodated between the two opposite key structures;

the key structure comprises a key pressing plate (22), a positioning rod (20), a stud (18), a butterfly nut (19), a jacking screw (21) and a first ear plate (23), wherein one end of the key pressing plate (22) can compress a conical melon petal (26), the other end of the key pressing plate (22) is hinged with the positioning rod (20), a long round hole is formed in the positioning rod (20), the stud (18) penetrates through the long round hole, the stud (18) is connected with the upper end face of the pressing beam (1), the stud (18) compresses the positioning rod (20) through the butterfly nut (19), the middle of the key pressing plate (22) is connected with the pressing beam (1) through the first ear plate (23), the key pressing plate (22) is hinged with the first ear plate (23), and the jacking screw (21) is in threaded connection with the pressing beam (1), the jacking screw (21) can jack the end part of the key pressing plate (22) hinged with the positioning rod (20).

2. The tapered circular ring tailor-welding device according to claim 1, wherein: the supporting structure comprises a chain block (14), a supporting column structure and a supporting seat structure (11);

the supporting column structure is arranged between the chain block (14) and the supporting seat structure (11), the supporting seat structure (11) is highly smaller than the supporting column structure, the top end of the supporting column structure is hinged to the base structure (7), the bottom end of the supporting column structure and the bottom end of the supporting seat structure (11) are both connected with the frame structure, one end of the chain block (14) is hinged to the frame structure, and the other end of the chain block (14) is hinged to the base structure (7).

3. The tapered circular ring tailor-welding device according to claim 2, wherein: the supporting seat structure (11) comprises two supports arranged in parallel and two supporting plates capable of supporting the base structure (7), the supporting plates are arranged on the upper end faces of the supports and located on the same plane, and the supports are arranged on the upper end face of the frame structure.

4. The tapered circular ring tailor-welding device according to claim 2, wherein: the key structure still includes roll adjustment mechanism, roll adjustment mechanism includes housing screw supporting seat (4) and can carry out longitudinal positioning's housing screw (3) to toper melon lamella (26), housing screw supporting seat (4) set firmly mould child (6) one end tip, housing screw (3) run through housing screw supporting seat (4), housing screw (3) with housing screw supporting seat (4) threaded connection.

5. The tapered circular ring tailor-welding apparatus according to any one of claims 2 to 4, wherein: the tailor-welding device still includes a plurality of compression screw (24), and is a plurality of compression screw (24) symmetry sets up two on pressure roof beam (1), it is same two adjacent compression screw (24) intervals equal on pressure roof beam (1), each compression screw (24) all with pressure roof beam (1) threaded connection, each compression screw (24) bottom all is equipped with can be right toper melon lamella (26) non-welding area carries out briquetting (25) that compresses tightly.

6. The tapered circular ring tailor-welding device according to claim 5, wherein: the tailor-welding device further comprises a connecting plate (16), one end of the connecting plate (16) is detachably connected with the two pressing beams (1), and the other end of the connecting plate (16) is detachably connected with the base structure (7).

7. The tapered circular ring tailor-welding device according to claim 5, wherein: the supporting structure further comprises two connecting rods (8), and when the base structure (7) is horizontally arranged, the end part of each pressing beam (1) far away from the hinged end is connected with the frame structure through one connecting rod (8).

8. The tapered circular ring tailor-welding device according to claim 5, wherein: the distance between two adjacent key structures on the same pressing beam (1) is equal.

9. The tapered circular ring tailor-welding device according to claim 5, wherein: the pillar structure includes pillar (10) that two set up side by side, two pillar (10) bottom with frame structural connection, two pillar (10) top all through a engaging lug (9) with base structure (7) are articulated.

10. The tapered circular ring tailor-welding device according to claim 5, wherein: the key pressing plate (22) is V-shaped in section structure, and the opening angle of the key pressing plate (22) is 100-120 degrees.

11. The tapered circular ring tailor-welding device according to claim 5, wherein: the joint design is including connecting (2) and attach fitting (5), connect (2) with attach fitting (5) are articulated, connect (2) and two press roof beam (1) to be connected, attach fitting (5) with base structure (7) are connected.

12. The tapered circular ring tailor-welding device according to claim 5, wherein: the frame structure comprises a frame body (12), two directional wheels (13), two brake wheels (15) and a plurality of adjustable support legs (17), wherein the directional wheels (13) are arranged on the lower end face of the frame body (12) in a bilateral symmetry mode, the brake wheels (15) are arranged on the lower end face of the frame body (12) in a bilateral symmetry mode, and the adjustable support legs (17) are symmetrically arranged on the left side and the right side of the frame body (12).

13. The tapered circular ring tailor-welding device according to claim 12, wherein: six adjustable supporting feet (17) are provided.

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