Semicircular butt-splicing type welding tool for scalloped segment section of stainless steel rocket storage tank

Abstract

The utility model provides a semicircular butt-splicing type welding tool for a scalloped segment section of a stainless steel rocket storage tank. The semicircular butt-splicing type welding tool comprises an inner tube mold rotating mechanism, an inner tube mold base and a scalloped segment inner tube. The inner tube mold base is arranged on the inner tube mold rotating mechanism and is used for supporting the scalloped segment inner tube and the bottom of the scalloped segment; the scalloped segment inner tube is used for supporting the inner side surface of the scalloped segment; the inner tube mold base is formed by splicing at least two arc-shaped rings; and the scalloped segment longitudinal seams corresponding to the arc-shaped rings are welded to form scalloped segment pieces, then the arc-shaped rings are spliced, and the spliced longitudinal seams of the scalloped segment pieces are welded to form complete scalloped segment sections. According to the welding tool, the welding difficulty of the scalloped segment can be reduced, and the assembling and welding precision of the scalloped segment can be improved.

Description

Technical Field

[0001] The utility model relates to the field of rocket tanks, in particular to a semicircular butt-joined welding tool for melon-shaped segments of stainless steel rocket tanks. Background Art

[0002] In the existing large-diameter stainless steel rocket tank manufacturing process, there are several major difficulties in manufacturing the melon-shaped segments of the stainless steel tank. First, the secondary clamping is difficult to control: the melon segment itself is a stainless steel plate with an elliptical arc shape. The plate is thin and has low rigidity. The secondary clamping is prone to deformation, which causes the gap of the assembly weld to change, resulting in reduced welding accuracy. Second, the dimensional accuracy of the single melon segment and the dimensional accuracy of the melon segment butt welding assembly are high: the size of the stainless steel tank melon segment is large, and the melon segment plate is very thin, so the shape retention of the melon segment is high. Third, the manufacturing process is complicated. Therefore, the welding of the melon segment can usually only be done by online cutting and online welding.

[0003] In order to reduce the welding difficulty of melon segments and improve the assembly and welding accuracy of melon segments, it is particularly important to design a semicircular welding tool for melon segments of stainless steel rocket tanks. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a semicircular butt-joined welding tool for the melon-shaped segments of a stainless steel rocket tank.

[0005] The utility model provides a semicircular splicing welding tool for the melon-shaped segment of a stainless steel rocket tank, comprising: an inner tube mold rotating mechanism, an inner tube mold base and a melon-shaped inner tube; the inner tube mold base is arranged on the inner tube mold rotating mechanism, and is used to support the melon-shaped inner tube and the bottom of the melon-shaped segment; the melon-shaped inner tube is used to support the inner side of the melon-shaped segment; the inner tube mold base is composed of at least two arc-shaped rings; the longitudinal seams of the melon segments corresponding to each of the arc-shaped rings are welded respectively to form melon-shaped segments, and then the arc-shaped rings are spliced ​​together to weld the longitudinal seams of the melon-shaped segments to form a complete melon-shaped segment.

[0006] According to one embodiment of the present invention, an inner mold tire base linear guide module is provided on the lower end face of the arc ring, and an inner mold tire base guide groove module is provided on the upper end face of the inner mold tire rotation mechanism to cooperate with the inner mold tire base linear guide module. The inner mold tire base linear guide module and the inner mold tire base guide groove module move relative to each other to realize the splicing of the arc ring.

[0007] According to one embodiment of the present invention, the inner tube mold base includes an inner tube mold base bottom plate and a melon slice mold base; the inner tube mold base bottom plate is fixedly connected to the inner tube mold rotating mechanism, and is used to support the melon slice mold base; the melon slice mold base is used to support the melon slice; the melon slice mold base can rotate at a small angle along its circumferential direction relative to the inner tube mold base bottom plate, driving the melon slice to rotate circumferentially, so as to fine-tune the welding position of the melon slice.

[0008] According to one embodiment of the present invention, a melon slice inner tube lower pressing mechanism is provided along the circumferential direction of the inner tube mold base; the melon slice inner tube lower pressing mechanism includes a lower pressing drive cylinder and a lower pressing block, and the lower pressing drive cylinder is extended and retracted to drive the lower pressing block toward or away from the melon slice to fit the bottom of the melon slice to the melon slice inner tube or release the melon slice.

[0009] According to one embodiment of the present invention, a support base is further included, and the inner tube mold rotating mechanism is sleeved on the support base; the inner tube mold rotating mechanism can rotate circumferentially relative to the support base to drive the inner tube mold base to rotate.

[0010] According to one embodiment of the present invention, the inner mold base linear guide module includes an active inner mold base linear guide module and a driven inner mold base linear guide module; the active inner mold base linear guide module is driven by a motor, and when the motor is started, it drives the active inner mold base linear guide module to move linearly along the corresponding inner mold base guide groove module, thereby driving the arc rings to mate.

[0011] According to one embodiment of the present invention, an outer cylindrical meshing gear is provided on the lower end surface of the melon slice mold base, and a bottom plate guide track is provided on the upper end surface of the bottom plate of the inner tire mold base that meshes with the outer cylindrical meshing gear of the base. The melon slice mold base rotates in the circumferential direction relative to the bottom plate of the inner tire mold base through the cooperation of the outer cylindrical meshing gear of the base and the bottom plate guide track.

[0012] According to one embodiment of the present invention, a melon slice mold base support guide rail is set on the upper end surface of the bottom plate of the inner tube mold base, and two positioning guide cylindrical wheels that cooperate with the melon slice mold base support guide rail are set on the lower end surface of the melon slice mold base; the two positioning guide cylindrical wheels are respectively arranged on both sides of the melon slice mold base support guide rail to provide radial direction limitation for the rotation of the melon slice mold base.

[0013] According to one embodiment of the present invention, the outer cylindrical meshing gear of the base is driven by a motor.

[0014] According to one embodiment of the present invention, the support guide rail of the melon slice mold base is an arc-shaped body concentric with the inner tube mold base.

[0015] According to the semicircular butt-joined welding tool for the melon-peel section of a stainless steel rocket tank of the utility model, by first cutting or welding at least two arc-shaped melon-peel pieces, and then butting the arc-shaped melon-peel pieces together and welding them through arc-shaped rings to form a complete melon-peel section, the welding difficulty of the melon-peel section can be reduced, and the assembly and welding accuracy of the melon-peel can be improved.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are part of the specification of the present utility model, which illustrate exemplary embodiments of the present utility model. The accompanying drawings and the description of the specification are used to explain the principle of the utility model.

[0018] Figure 1 This is a three-dimensional diagram of a semicircular welding tool for the melon-shaped segments of a stainless steel rocket tank according to one embodiment of the present invention;

[0019] Figure 2 This is a three-dimensional diagram of an inner tube mold base according to one embodiment of the present invention;

[0020] Figure 3 yes Figure 2 's split diagram;

[0021] Figure 4 This is a three-dimensional diagram of an inner tube mold rotating mechanism according to an embodiment of the present invention;

[0022] Figure 5 This is a three-dimensional diagram of an inner tube mold base according to one embodiment of the present invention;

[0023] Figure 6 This is a three-dimensional diagram of a lower pressing drive cylinder according to an embodiment of the present invention;

[0024] Figure 7 This is a bottom view of the arcuate ring of the inner tube mold base according to one embodiment of the present invention;

[0025] Figure 8 This is a top view of the arcuate ring of the inner tube mold base according to one embodiment of the present invention;

[0026] Figure 9 yes Figure 8 AA section view;

[0027] Figure 10 This is a three-dimensional diagram of a semicircular welding tool for the melon-shaped segments of a stainless steel rocket tank according to one embodiment of the present invention;

[0028] Figure 11It is a front view of the arcuate ring of the inner tube mold base according to one embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1-1 Melon slice inner tube; 1-3 Melon slice inner tube lower clamping mechanism; 1-4 Inner tube mold base; 1-5 Inner tube mold rotating mechanism; 1-6 Support base; 1-7 Support leg; 1-3-1 Lower clamping drive cylinder; 1-3-2 Lower clamping block; 1-4-1 Inner tube mold base bottom plate; 1-4-2 Melon slice mold base; 1-4-3 Melon slice mold base support guide rail; 1-4-4 Positioning guide cylindrical wheel; 1-4-5 Base outer cylindrical meshing gear; 1-4-6 Bottom plate guide rail; 1-4-7 Active inner tube mold base linear guide module; 1-4-8 Driven inner tube mold base linear guide module; 1-5-1 Rotating cylindrical meshing gear; 1-5-2 Rotating mechanism; 1-5-3 Inner tube mold base guide groove module; 2- Melon slice outer clamping component. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the dimensions of some structural components or areas in the drawings may be enlarged for other structural components or areas to facilitate understanding of the embodiments of the present invention.

[0032] The directional words that appear in the following description refer to the directions shown in the drawings and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise specified, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] In addition, the terms "include", "comprising", "having" or any other variations thereof are intended to cover non-exclusive inclusion, so that a structure or component comprising a series of elements includes not only those elements, but also other mechanical elements not explicitly listed or inherent in the structure or component. In the absence of more limitations, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0034] Spatially relative terms such as "below," "beneath," "under," "low," "above," "on," "high," and the like are used to facilitate description to explain the positioning of one element relative to a second element, indicating that these terms are intended to encompass different orientations of the device in addition to those shown in the figures. Additionally, for example, "one element is above / below another element" may indicate that the two elements are in direct contact, or may indicate that there are other elements between the two elements. Furthermore, terms such as "first," "second," and the like are also used to describe various elements, regions, portions, and the like, and do not specifically refer to an order or sequence, and should not be considered limiting. Similar terms are used throughout the description to indicate similar elements.

[0035] In the following description of the present invention, in certain scenarios, only the terms "rocket", "carrier rocket", "spacecraft", "space carrier" or "missile" may be used. This is only for the convenience of description, and its connotation is not limited to the specific words used. Generally speaking, the rockets of the present invention include carrier rockets or space carriers used to carry satellites, spacecraft or other probes, as well as various types of missiles, rockets and other weapons used to carry military payloads, as well as similar products that can send payloads into the air. When interpreting the above-mentioned specific terms, those skilled in the art shall not limit the rocket to only one of the carrier rockets or missiles based on the specific words used to describe the scenario, thereby narrowing the scope of protection of the present invention.

[0036] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0037] Figure 1 This is a three-dimensional diagram of a semicircular welding tool for the melon-shaped segments of a stainless steel rocket tank according to one embodiment of the present invention; Figure 2 This is a three-dimensional diagram of an inner tube mold base according to one embodiment of the present invention; Figure 3 yes Figure 2 's split diagram; Figure 4 This is a three-dimensional diagram of an inner tube mold rotating mechanism according to an embodiment of the present invention; Figure 5 This is a three-dimensional diagram of an inner tube mold base according to one embodiment of the present invention; Figure 6 This is a three-dimensional diagram of a lower pressing drive cylinder according to an embodiment of the present invention; Figure 7 This is a bottom view of the arcuate ring of the inner tube mold base according to one embodiment of the present invention;

[0038] Figure 8 This is a top view of the arcuate ring of the inner tube mold base according to one embodiment of the present invention; Figure 9 yes Figure 8AA section view; Figure 10 This is a three-dimensional diagram of a semicircular welding tool for the melon-shaped segments of a stainless steel rocket tank according to one embodiment of the present invention; Figure 11 It is a front view of the arcuate ring of the inner tube mold base according to one embodiment of the utility model.

[0039] like Figure 1 、 2 As shown in Figure 3, the utility model provides a semicircular splicing welding tool for the melon segment of a stainless steel rocket tank, comprising: an inner tube mold rotating mechanism 1-5, an inner tube mold base 1-4 and a melon segment inner tube 1-1. The inner tube mold base 1-4 is arranged on the inner tube mold rotating mechanism 1-5, and is used to support the melon segment inner tube 1-1 and the bottom of the melon segment. The melon segment inner tube 1-1 is used to support the inner side of the melon segment. The inner tube mold base 1-4 is composed of at least two arc-shaped rings spliced ​​together, and the longitudinal seams of the melon segments corresponding to each arc-shaped ring are welded separately to form melon segments, and then the arc-shaped rings are spliced ​​together to weld the longitudinal seams of the melon segments to form a complete melon segment.

[0040] In this embodiment, the melon petals corresponding to the multiple arc rings can be welded separately to form multiple melon petal pieces, and then the corresponding melon petal pieces can be driven to be spliced ​​together by the arc rings, and the longitudinal seams between the melon petal pieces can be welded to form complete melon petal segments.

[0041] For example, the inner tube mold base can be constructed by splicing two semicircular rings. First, the melon segments placed above the two semicircular rings can be welded together to form the two semicircular melon segments. The edges of the two semicircular melon segments to be welded are then cut. Finally, the two semicircular rings of the inner tube mold base are joined together, and the welded seam is welded to form a complete melon segment.

[0042] The welding fixture of this embodiment is suitable for producing melon segments through online cutting and welding (such as laser penetration welding). This welding fixture can control the shape and size of the melon segments, preventing deformation and improving weld performance. It also allows for cutting and welding of the melon segments in a single clamping operation, avoiding deformation caused by secondary clamping. This welding fixture can reduce the difficulty of welding the melon segments and improve the assembly and welding accuracy of the melon segments.

[0043] In this embodiment, the end surface of the melon segment inner tube supporting the melon segment can be an arcuate surface that matches the inner surface of the melon segment. Multiple melon segment inner tubes can be provided along the circumference of the melon segment rotation support assembly, with each segment inner tube corresponding to each melon segment. For example, for a melon segment segment welded from 16 melon segments, 16 melon segment inner tubes can be provided.

[0044] like Figure 4As shown, according to one embodiment of the present invention, an inner mold tire base linear guide module is provided on the lower end face of the arc ring, and an inner mold tire base guide groove module 1-5-3 is provided on the upper end face of the inner mold tire rotation mechanism 1-5, which cooperates with the inner mold tire base linear guide module. The inner mold tire base linear guide module and the inner mold tire base guide groove module 1-5-3 move relative to each other to realize the splicing of the arc ring.

[0045] like Figure 5 As shown, according to one embodiment of the present invention, the inner tube mold base 1-4 includes an inner tube mold base bottom plate 1-4-1 and a melon slice mold base 1-4-2. The inner tube mold base bottom plate 1-4-1 is fixedly connected to the inner tube mold rotation mechanism 1-5 and is used to support the melon slice mold base 1-4-2, which is used to support the melon slice. The melon slice mold base 1-4-2 can rotate at a small angle along its circumferential direction relative to the inner tube mold base bottom plate 1-4-1, driving the melon slice to rotate circumferentially, thereby fine-tuning the welding position of the melon slice.

[0046] The welding tool of this embodiment can improve the welding accuracy of the melon slices by adjusting the melon slices at a small angle.

[0047] like Figure 1 and 6 As shown, according to one embodiment of the present invention, a melon segment inner tube lower pressing mechanism 1-3 is provided along its circumferential direction on the inner tube mold base 1-4. The melon segment inner tube lower pressing mechanism 1-3 includes a lower pressing drive cylinder 1-3-1 and a lower pressing block 1-3-2. The lower pressing drive cylinder 1-3-1 is extended and retracted to drive the lower pressing block 1-3-2 toward or away from the melon segment, thereby fitting the bottom of the melon segment to the melon segment inner tube 1-1 or releasing the melon segment.

[0048] The welding fixture of this embodiment can make the melon slice (especially the lower part of the melon slice) fit to the melon slice inner tube through the melon slice inner tube lower pressing mechanism, thereby improving the cutting and welding assembly accuracy of the melon slice. The lower pressing block is used to press the end face of the melon slice, and can be an arc-shaped surface that matches the outer side surface of the melon slice. The melon slice rotating support assembly can be provided with multiple melon slice inner tube lower pressing mechanisms 1-3 along its circumferential direction. For example, for each melon slice, three melon slice inner tube lower pressing mechanisms 1-3 can be provided accordingly, so that the lower part of the melon slice can be better fitted to the melon slice inner tube, ensuring the assembly accuracy of cutting and welding. The lower pressing drive cylinder 1-3-1 can be a pneumatic cylinder, an electric cylinder, etc.

[0049] like Figure 1 As shown, according to one embodiment of the present invention, in addition to the inner tube mold rotating mechanism 1-5, the inner tube mold base 1-4, and the melon-shaped inner tube 1-1, the welding fixture also includes a support base 1-6. The inner tube mold rotating mechanism 1-5 is sleeved on the support base 1-6. The inner tube mold rotating mechanism 1-5 can rotate circumferentially relative to the support base 1-6, thereby driving the inner tube mold base 1-4 to rotate.

[0050] The welding tool of this embodiment can achieve welding of all melon slice longitudinal seams without moving the positions of welding equipment and cutting equipment by setting up an inner tube mold rotating mechanism 1-5 that can rotate around the supporting base 1-6, thereby ensuring the consistency of weld quality.

[0051] Furthermore, a plurality of (for example, 16) supporting legs 1-7 are provided along the circumferential direction of the lower end surface of the supporting base 1-6, and the supporting legs 1-7 are used to support the supporting base 1-6.

[0052] According to one embodiment of the present invention, the inner tube mold rotating mechanism 1-5 includes a motor, which drives the outer gear, and then drives the inner gear meshing with it through the outer gear to realize the circular rotation of the inner tube mold rotating mechanism 1-5, thereby driving the inner tube mold base 1-4 to realize the rotation of the melon slice inner tube 1-1 and the melon slice.

[0053] like Figure 4 As shown, according to one embodiment of the present invention, the inner tube mold rotation mechanism 1-5 includes a rotating cylindrical meshing gear 1-5-1 and a rotating mechanism 1-5-2. The rotating cylindrical meshing gear 1-5-1 and the rotating mechanism 1-5-2 are meshed. The rotating cylindrical meshing gear 1-5-1 is connected to a motor. When the motor is started, it drives the rotating cylindrical meshing gear 1-5-1 to move the rotating mechanism 1-5-2. The rotating mechanism 1-5-2 is used to support the inner tube mold base 1-4 and drive the inner tube mold base 1-4 to rotate circumferentially.

[0054] like Figure 7 and 11 As shown, according to one embodiment of the present invention, the inner mold base linear guide module includes an active inner mold base linear guide module 1-4-7 and a passive inner mold base linear guide module 1-4-8. The active inner mold base linear guide module 1-4-7 is driven by a motor. When the motor is turned on, it drives the active inner mold base linear guide module 1-4-7 to move linearly along the corresponding inner mold base guide groove module 1-5-3, driving the arc rings to align.

[0055] In this embodiment, an active inner tire mold base linear guide module 1-4-7 can be set in the middle of the inner tire mold base arc ring, and a set of driven inner tire mold base linear guide modules 1-4-8 can be set at both ends of the inner tire mold base arc ring. For example, after welding the melon petal segments of the two semi-circular rings, the motor is started, and the active inner tire mold base linear guide module 1-4-7 moves linearly along the inner tire mold base guide groove module 1-5-3, and the driven inner tire mold base linear guide module 1-4-8 moves linearly along the corresponding inner tire mold base guide groove module 1-5-3, driving the inner tire mold base 1-4 to drive the melon petal segments of the two semi-circular rings to move toward each other for splicing and docking. Then, the welding process is started to weld the splicing welds of the melon petal segments of the two semi-circular rings to form a complete melon petal segment.

[0056] like Figure 8 and 9 As shown, according to one embodiment of the present invention, the lower end surface of the melon slice mold base 1-4-2 is provided with a base outer cylindrical meshing gear 1-4-5, and the upper end surface of the inner tube mold base bottom plate 1-4-1 is provided with a bottom plate guide track 1-4-6 meshing with the base outer cylindrical meshing gear 1-4-5. The melon slice mold base 1-4-2 rotates relative to the inner tube mold base bottom plate 1-4-1 along its circumferential direction through the cooperation of the base outer cylindrical meshing gear 1-4-5 and the bottom plate guide track 1-4-6.

[0057] The welding fixture of this embodiment can achieve circumferential rotation of the melon slice mold base 1-4-2 relative to the inner tube mold base plate 1-4-1 by meshing the base outer cylindrical meshing gear 1-4-5 with the base plate guide rail 1-4-6. The inner tube mold base 1-4 can be equipped with multiple sets of base outer cylindrical meshing gears 1-4-5 and base plate guide rails 1-4-6.

[0058] like Figure 9 As shown, according to one embodiment of the present invention, the upper end surface of the inner tube mold base bottom plate 1-4-1 is provided with a melon slice mold base support guide rail 1-4-3, and the lower end surface of the melon slice mold base 1-4-2 is provided with two positioning guide cylindrical wheels 1-4-4 that cooperate with the melon slice mold base support guide rail 1-4-3. The two positioning guide cylindrical wheels 1-4-4 are respectively provided on both sides of the melon slice mold base support guide rail 1-4-3 to provide radial direction limit for the rotation of the melon slice mold base 1-4-2.

[0059] In this embodiment, the melon slice mold base support rails 1-4-3 can be arc-shaped. Multiple melon slice mold base support rails 1-4-3 can be provided on the upper end surface of the inner tube mold base plate 1-4-1. Correspondingly, multiple positioning guide cylindrical wheels 1-4-4 can be provided on the lower end surface of the melon slice mold base 1-4-2. The melon slice mold base support rails 1-4-3 can also support the melon slice mold base 1-4-2.

[0060] According to one embodiment of the present invention, the outer cylindrical meshing gear 1-4-5 of the base is driven by a motor.

[0061] In this embodiment, the motor is started, and the outer cylindrical meshing gear 1-4-5 of the base moves along the bottom plate guide track 1-4-6, driving the melon slice mold base 1-4-2 to rotate circumferentially relative to the inner tube mold base bottom plate 1-4-1, thereby realizing the automation of the welding process.

[0062] According to one embodiment of the present invention, the support guide rail 1-4-3 of the melon slice mold base is an arc-shaped member concentric with the inner tube mold base 1-4.

[0063] The welding fixture of this embodiment can ensure the consistency of the welding positions of the melon slices.

[0064] like Figure 10 As shown, according to one embodiment of the present invention, in addition to the inner tube mold rotating mechanism 1-5, the inner tube mold base 1-4 and the melon segment inner tube 1-1, the welding tool also includes a melon segment outer pressing component 2. The melon segment outer pressing component 2 is used to press the melon segment onto the melon segment inner tube 1-1 from the outer side of the melon segment.

[0065] The above embodiments of the present invention can be combined with each other and have corresponding technical effects.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A semicircular welding tool for stainless steel rocket tank melon segment, characterized in that: include: Inner tube mold rotating mechanism, inner tube mold base and melon segment inner tube; the inner tube mold base is arranged on the inner tube mold rotating mechanism, and is used to support the melon segment inner tube and the bottom of the melon segment; the melon segment inner tube is used to support the inner side of the melon segment; the inner tube mold base is composed of at least two arc-shaped rings; the longitudinal seams of the melon segments corresponding to each of the arc-shaped rings are welded respectively to form melon segment pieces, and then the arc-shaped rings are spliced ​​together to weld the longitudinal seams of the melon segment pieces to form a complete melon segment.

2. The welding tool according to claim 1, characterized in that: An inner mold base linear guide module is provided on the lower end face of the arc ring, and an inner mold base guide groove module is provided on the upper end face of the inner mold rotation mechanism to cooperate with the inner mold base linear guide module. The inner mold base linear guide module and the inner mold base guide groove module move relative to each other to realize the splicing of the arc ring.

3. The welding tool according to claim 1, characterized in that: The inner tube mold base includes an inner tube mold base bottom plate and a melon slice mold base; the inner tube mold base bottom plate is fixedly connected to the inner tube mold rotating mechanism, and is used to support the melon slice mold base; the melon slice mold base is used to support the melon slice; the melon slice mold base can rotate at a small angle relative to the inner tube mold base bottom plate along its circumferential direction, driving the melon slice to rotate circumferentially, so as to fine-tune the welding position of the melon slice.

4. The welding tool according to claim 1, characterized in that: The inner tube mold base is provided with a melon slice inner tube lower pressing mechanism along its circumferential direction; the melon slice inner tube lower pressing mechanism includes a lower pressing drive cylinder and a lower pressing block, and the lower pressing drive cylinder is extended and retracted to drive the lower pressing block toward or away from the melon slice to fit the bottom of the melon slice to the melon slice inner tube or release the melon slice.

5. The welding tool according to claim 1, characterized in that: It also includes a support base, and the inner tube mold rotating mechanism is sleeved on the support base; the inner tube mold rotating mechanism can rotate circumferentially relative to the support base to drive the inner tube mold base to rotate.

6. The welding tool according to claim 2, characterized in that: The inner mold base linear guide module includes an active inner mold base linear guide module and a driven inner mold base linear guide module; the active inner mold base linear guide module is driven by a motor to perform linear motion along the corresponding inner mold base guide groove module to drive the arc ring to be assembled.

7. The welding tool according to claim 3, characterized in that: An outer cylindrical meshing gear is provided on the lower end surface of the melon slice mold base, and a bottom plate guide track is provided on the upper end surface of the bottom plate of the inner tire mold base that meshes with the outer cylindrical meshing gear of the base. The melon slice mold base rotates in the circumferential direction relative to the bottom plate of the inner tire mold base through the cooperation between the outer cylindrical meshing gear of the base and the bottom plate guide track.

8. The welding tool according to claim 3, characterized in that: A melon slice mold base support guide rail is set on the upper end surface of the bottom plate of the inner tube mold base, and two positioning guide cylindrical wheels that cooperate with the melon slice mold base support guide rail are set on the lower end surface of the melon slice mold base; the two positioning guide cylindrical wheels are respectively set on both sides of the melon slice mold base support guide rail to provide radial direction limitation for the rotation of the melon slice mold base.

9. The welding tool according to claim 7, characterized in that: The outer cylindrical meshing gear of the base is driven by a motor.

10. The welding tool according to claim 8, characterized in that: The support guide rail of the melon slice mold base is an arc shape concentric with the inner tube mold base.

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