Spiral cylinder welding forming device and welding forming method

Abstract

The invention discloses a spiral barrel welding forming device and method. The spiral barrel welding forming device comprises a supporting assembly; the two ends of the mandrel are rotationally connected with the supporting seats respectively; the multiple sets of spiral pipe guiding assemblies are arranged on the core shaft in the axis direction of the core shaft at intervals, each spiral pipe guiding assembly is provided with a plurality of limiting grooves evenly distributed in the circumferential direction, and a limiting structure matched with the spiral pipe in shape is jointly formed on the surface of the core shaft through the limiting grooves in the spiral pipe guiding assemblies; the multiple sets of pressing assemblies are used for fixing the spiral pipe; the lantern ring assembly is arranged on the mandrel in a matched and sleeved mode and arranged between the spiral pipe guiding assemblies. According to the invention, the mandrel is used as the positioning reference of the spiral pipes, and the position precision between the spiral pipes is ensured, so that the problem that the precision of the spiral pipes in the spiral cylinder cannot be ensured is well solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of welding forming, and particularly relates to a spiral cylinder welding forming device and a welding forming method. BACKGROUND

[0002] As Figure 1 is a schematic view of a certain type of spiral cylinder structure. The spiral cylinder is composed of skin I, skin II, skin III, skin IV, skin V, skin VI, a lock, a barrier, a collar I, a collar II, a bottom plate assembly, a collar III, a flow guide assembly, four spiral tubes, six left rib plates, six right rib plates, two trapezoidal plates, a plug, and the like. Among them, the length of the spiral cylinder is greater than 2m, the skin I, the skin II, the skin III, the skin IV, the skin V, and the skin VI together form the outer cylinder of the spiral cylinder, each spiral tube is connected with the outer cylinder through the left rib plate and the right rib plate, and the spiral tube is fixedly arranged in the outer cylinder; the spiral tube is in a spiral line type structure, and the four spiral tubes are arranged at an angle of 90 degrees in the circumferential direction.

[0003] The spiral cylinder structure is complex, large in size and high in precision requirement, especially the four spiral tubes in the spiral line type in the cylinder are used as guide rails, so the position precision of the spiral tube in the cylinder is required to be good, which leads to the problems of forming difficulty and low forming precision in the process of spiral cylinder forming. SUMMARY

[0004] The purpose of the present application is to provide a spiral cylinder welding forming device and a welding forming method to solve the problems of spiral cylinder forming difficulty and low forming precision.

[0005] The present application is realized by the following technical scheme: The spiral cylinder welding forming device is used for welding forming of a spiral cylinder. The spiral cylinder includes an outer cylinder formed by a skin and four groups of spiral tubes in a spiral line type arranged in the outer cylinder. The spiral tubes are arranged at an angle of 90 degrees in the circumferential direction. The spiral tubes are fixedly connected to the outer cylinder through a plurality of left rib plates and right rib plates. A plurality of collar assemblies are arranged in the outer cylinder along the axial direction of the outer cylinder. The collar assemblies are used for supporting the outer cylinder and are connected with the spiral tubes and the left rib plates and the right rib plates. The spiral cylinder welding forming device comprises: a support assembly comprising two support seats; a mandrel rotatably connected with the support seats at both ends; a plurality of spiral tube guide assemblies arranged at intervals along the axial direction of the mandrel. Each spiral tube guide assembly has a plurality of limiting grooves arranged at an angle of 90 degrees in the circumferential direction. The limiting grooves in the spiral tube guide assemblies form a limiting structure on the surface of the mandrel, which matches the spiral line type of the spiral tube. a plurality of pressing assemblies arranged on both sides of the spiral tube guide assembly for fixing the spiral tube; The sleeve assembly is fitted on the mandrel and arranged between the spiral tube guide assemblies.

[0006] In some embodiments, positioning rings are respectively fitted on both ends of the mandrel, the positioning rings are fitted on the mandrel, and positioning notches matching the spiral tube are arranged on the inner circumferences of the positioning rings.

[0007] In some embodiments, the spiral tube guide assembly comprises a plurality of guide blocks arranged along the circumference of the mandrel, and the guide blocks form limiting grooves therebetween.

[0008] In some embodiments, the pressing assembly comprises a plurality of pressing blocks arranged along the circumference of the mandrel, the pressing blocks have a clamp structure, connecting holes for fixed connection with the mandrel are respectively arranged at both ends of the pressing blocks, and pressing notches matching the spiral tube are arranged on the pressing blocks.

[0009] In some embodiments, a demolding layer is arranged on the mandrel.

[0010] In some embodiments, a spiral line scribing cylinder is further included, the spiral line scribing cylinder can be fitted on the mandrel, and a plurality of scribing grooves matching the line type of the spiral tube are arranged on the spiral line scribing cylinder along the circumference thereof.

[0011] In some embodiments, the mandrel and the support base are connected through a detachable connection structure.

[0012] In another aspect, the present application further provides a spiral cylinder welding forming method, which adopts the spiral cylinder welding forming device to perform welding operation on the spiral cylinder, and comprises the following steps: Positioning and installing the spiral tube on the mandrel; Welding the sleeve assembly and the spiral tube; Welding the left and right rib plates with the spiral tube and the sleeve assembly respectively, and detaching the pressing assembly from the mandrel; Welding the skin with the left and right rib plates and the sleeve assembly respectively, and detaching the spiral tube guide assembly from the mandrel; Detaching the mandrel and the welded and formed spiral cylinder as a whole from the support base; Demolding the spiral cylinder from the mandrel.

[0013] In some embodiments, the step of positioning and installing the spiral tube on the mandrel comprises: Scribing on the mandrel to determine the axial positioning lines of the spiral tube guide assembly, the pressing assembly, and the sleeve assembly, and the circumferential positioning line of the spiral tube guide assembly; Fitting the sleeve assembly on the mandrel and fixedly installing the spiral tube guide assembly on the mandrel; The spiral tubes are positioned and installed on the mandrel, and then fixed by the clamping assembly.

[0014] In some embodiments, the step of welding the skin to the left stiffening plate, the right stiffening plate, and the collar assembly respectively includes: The skins are welded in the following order: skin III-skin IV-skin II-skin V-skin I-skin VI. The positional relationship of the skins on the spiral cylinder is that they are symmetrically arranged from the center to both ends: skin III-skin II-skin I, skin IV-skin V-skin VI. Before welding each skin, the spiral tube guide assembly at the corresponding position of the skin is removed from the mandrel.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention provides a spiral tube guide assembly on a mandrel and forms a limiting structure on the mandrel that matches the spiral tube's shape. The limiting structure positions and installs the spiral tube on the mandrel, and the clamping assembly and positioning ring fix the spiral tube onto the mandrel. The mandrel serves as the positioning reference for the spiral tube, ensuring the positional accuracy of the spiral tube and the spiral tubes, thus effectively solving the problem of the inability to guarantee the accuracy of the spiral tube inside the spiral cylinder.

[0016] Based on the welding forming device of the present invention, the welding process and welding sequence are designed, the welding operation is convenient, and the demolding is convenient after the spiral cylinder is welded and formed, which effectively solves the problem of the difficulty of spiral cylinder forming operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a side view of the spiral cylinder of the present invention.

[0019] Figure 2 This is a partial structural diagram of the spiral cylinder of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal spiral tube arrangement structure of the spiral cylinder of the present invention.

[0021] Figure 4 This is a schematic diagram of the spiral cylinder welding and forming device according to an embodiment of the present invention.

[0022] Figure 5This is a schematic diagram of the positioning and installation structure of the spiral tube on the mandrel in the spiral tube welding and forming device according to an embodiment of the present invention.

[0023] Figure 6 This is a front view of the positioning and installation structure of the spiral tube on the mandrel in the spiral tube welding and forming device according to an embodiment of the present invention.

[0024] Figure 7 This is a partial schematic diagram of the spiral tube positioning and installation structure in the spiral tube welding and forming device according to an embodiment of the present invention.

[0025] Figure 8 This is a front view of the mandrel structure in the spiral cylinder welding and forming device according to an embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram of the spiral tube guide assembly in the spiral tube welding and forming device according to an embodiment of the present invention.

[0027] Figure 10 This is a schematic diagram of the clamping block structure in the spiral cylinder welding and forming device according to an embodiment of the present invention.

[0028] Figure 11 This is a schematic diagram of the positioning ring structure in the spiral cylinder welding and forming device according to an embodiment of the present invention.

[0029] Figure 12 This is a schematic diagram of the spiral scribing cylinder structure in an embodiment of the present invention.

[0030] in: 11. Skin, 12. Spiral tube, 13. Left stiffening plate, 14. Right stiffening plate; 21. Support base; 22. Mandrel; 221. Axis positioning line; 23. Spiral tube guide assembly; 231. Guide block; 232. Limiting groove; 24. Pressing assembly; 241. Pressing block; 242. Pressing notch; 25. Collar assembly; 26. Positioning ring; 261. Positioning notch; 27. Spiral line scribing tube; 271. Scribing groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0032] The spiral cylinder has a complex structure, consisting of more than 150 parts. The assembly and welding of numerous parts, as well as ensuring the welding and forming accuracy of key components (such as the spiral tube), bring great difficulties to the forming of the spiral cylinder. In addition, after the spiral cylinder is assembled and welded, how to control the welding deformation of the spiral cylinder and the demolding operation of the spiral cylinder after welding are all problems that need to be solved in the spiral cylinder welding and forming operation.

[0033] Reference Figure 1 , Figure 2 and Figure 3 The spiral cylinder is a structure consisting of four sets of spiral tubes 12 arranged in a spiral shape inside an outer cylinder formed by a skin 11. The spiral tubes 12 are fixedly connected to the outer cylinder by multiple sets of left stiffening plates 13 and right stiffening plates 14. Multiple sets of collar assemblies 25 are arranged at intervals along the axial direction inside the outer cylinder to support the outer cylinder and to connect with the spiral tubes, left stiffening plates, and right stiffening plates respectively. Due to the complex internal structure of the spiral cylinder and the high positional accuracy requirements of the spiral tubes, the welding of the spiral cylinder is difficult, and the welding quality is hard to guarantee.

[0034] To address the problems existing in the welding and forming of spiral cylinders, this invention provides a spiral cylinder welding and forming apparatus, as described above. Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments of the present invention, the spiral cylinder welding and forming apparatus includes: The support assembly includes two support bases 21; The mandrel 22 is rotatably connected to the support base 21 at both ends. Multiple sets of spiral tube guide assemblies 23 are spaced apart on the mandrel 22 along the mandrel axis. Each spiral tube guide assembly 23 has multiple limiting grooves 232 evenly distributed in the circumferential direction, and the limiting grooves 232 on each spiral tube guide assembly together form a limiting structure on the mandrel surface that matches the spiral tube profile. Multiple sets of clamping components 24 are respectively arranged on both sides of the spiral tube guide component 23 for fixing the spiral tube; The collar assembly 25 is fitted onto the mandrel 22 and positioned between the spiral tube guide assemblies. The collar assembly 25 matches the outer cylinder of the spiral tube and is used to position and support the outer cylinder.

[0035] The support 21 is provided with a lower support and an upper cover for connecting the mandrel. The upper cover and the lower support are detachable to facilitate the installation and removal of the mandrel on the support. A bearing is provided between the lower support, the upper cover and the mandrel to enable the mandrel end to be rotatably connected to the support.

[0036] Positioning rings 26 are respectively sleeved at both ends of the mandrel 22, and the positioning rings 26 are fitted onto the mandrel 22. Figure 11 The positioning ring 26 has a positioning notch 261 on its inner circumference that matches the spiral tube. The positioning ring 26 is used to fix the two ends of the four spiral tubes that are positioned and installed on the mandrel, so as to facilitate the welding and forming operation of the spiral cylinder.

[0037] ReferenceFigure 9 The spiral tube guide assembly 23 includes a plurality of guide blocks 231 evenly distributed along the circumference of the mandrel, and limiting grooves 232 are formed between the guide blocks 231. The guide blocks 231 of each spiral tube guide assembly are arranged on the mandrel, and the limiting grooves form a limiting structure on the surface of the mandrel that matches the spiral tube profile. The forming limiting structure is used to limit the installation of the spiral tube on the mandrel, ensuring the positional accuracy of the spiral tube and the spiral tubes.

[0038] like Figure 10 The clamping assembly 24 includes a plurality of clamping blocks 241 arranged circumferentially along the mandrel. The clamping blocks 241 have a clamping structure. Each end of the clamping block 241 has a connection hole for fixed connection with the mandrel. A clamping notch 242 matching the spiral tube is provided on the clamping block.

[0039] The spiral tube is positioned on the mandrel by a limiting structure, and then the two ends of the spiral tube are fixed and positioned by a positioning ring. Finally, the spiral tube is fixed and installed on both sides of the spiral tube guide assembly by clamping blocks, and the clamping blocks are fixed on the mandrel by bolts.

[0040] In the positioning and installation of the spiral tube, the positional accuracy of the guide blocks on the mandrel directly affects the positioning and installation accuracy of the spiral tube on the mandrel. To ensure the positional accuracy of each guide block on the mandrel, a spiral scribing cylinder 27 is used to scribing lines on the mandrel. This spiral scribing cylinder 27 matches the mandrel and can be fitted onto the mandrel. Figure 12 Four scribing grooves 271, matching the shape of the spiral tube, are provided along the circumference of the spiral scribing cylinder 27. The four scribing grooves are respectively matched with the spiral tube, and the positional relationship between the four scribing grooves matches the positional relationship between the spiral tubes. Thus, the installation position of the spiral tube can be accurately determined on the mandrel through the scribing grooves.

[0041] Install the spiral scribing cylinder 27 onto the mandrel 22, and then scribing eight spiral contour lines matching the spiral tube shape on the mandrel, using the scribing groove as a reference.

[0042] Axial positioning lines 221 for the guide block, clamping block, positioning ring, and collar assembly are respectively engraved on the mandrel 22. Combined with the spiral contour lines drawn on the mandrel, positioning references are provided for the positioning and installation of the guide block, clamping block, positioning ring, and collar assembly on the mandrel, so as to ensure the positioning and installation accuracy of the guide block, clamping block, positioning ring, and collar assembly on the mandrel.

[0043] In some embodiments, a release layer is provided on the mandrel to facilitate demolding of the spiral tube from the mandrel. For example, a copper sheet is provided between the mandrel and the spiral tube to reduce the demolding friction between the spiral tube and the mandrel during demolding and to prevent damage to the spiral tube during demolding.

[0044] Guide block 231, clamping block 241, etc. are fixed to mandrel 22 by screws. The threaded hole on mandrel 22 can be made during the final assembly of the device to ensure the installation accuracy of guide block and clamping block on mandrel.

[0045] On the other hand, based on the welding forming apparatus in the above embodiments of the present invention, the welding forming process of the spiral cylinder is designed to ensure the welding forming operation and demolding operation of the spiral cylinder.

[0046] In some embodiments of the present invention, the spiral cylinder welding and forming method includes the following steps: Position and install the spiral tube onto the mandrel; Position the collar assembly on the mandrel and spot weld it to the spiral tube; weld the collar assembly to the spiral tube. Position the welding points of the left and right stiffening plates, weld them to the spiral tube and collar assembly respectively, and remove the clamping assembly from the mandrel. Position the welding points of the skin, weld the skin to the left stiffening plate, right stiffening plate and collar assembly respectively, and remove the spiral tube guide assembly from the mandrel; Remove the mandrel and the welded spiral cylinder as a whole from the support base; Position and weld the base plate assembly onto the auger cylinder; Demold the spiral cylinder off the mandrel.

[0047] In some embodiments, the step of positioning and mounting the spiral tube onto the mandrel includes: Scribing lines on the mandrel to determine the circumferential positioning line of the spiral tube guide assembly on the mandrel; determining the positions of the guide block, clamping block, and collar assembly on the mandrel based on the circumferential positioning line and the axial positioning lines of the spiral tube guide assembly, clamping assembly, and collar assembly; Slide the collar assemblies onto the mandrel and fix the spiral tube guide assembly onto the mandrel; The spiral tubes are positioned and installed on the mandrel, and the spiral tubes are fixed by the clamping assembly and the two ends of the spiral tubes are fixed by the positioning rings.

[0048] Apply grease to the area on the mandrel where the spiral tube is mounted to facilitate demolding.

[0049] The steps for welding the septum of the collar assembly to the spiral tube are as follows: Assemble the collar assembly onto the mandrel in sequence, rotate the collar assembly to make its inner surface mate with the spiral tube, and adjust the axial position of the collar assembly on the mandrel. Then spot weld the collar assembly to the threaded tube. After confirming the position of the collar assembly again, weld the collar assembly to the spiral tube for fixation.

[0050] The steps for welding the left stiffening plate and right stiffening plate to the spiral tube and collar assembly are as follows: Install each set of left and right stiffening plates onto the spiral tube and collar assembly in sequence (e.g., from left to right) and spot weld them together. Then, weld and fix each set of left and right stiffening plates to the spiral tube and collar assembly in sequence.

[0051] During the welding operation of the left and right stiffening plates, before welding each set of left and right stiffening plates, the clamping blocks at the corresponding positions on the mandrel are disassembled to avoid interference with the left and right stiffening plates; the welding of each set of left and right stiffening plates and the disassembly of the clamping blocks are completed one by one.

[0052] The steps for welding the skin to the left stiffening plate, right stiffening plate, and partition plate respectively include: To control welding deformation, the skins are welded in the following order: skin III-skin IV-skin II-skin V-skin I-skin VI. The positional relationship of the skins on the spiral cylinder is that they are symmetrically arranged from the center to both ends: skin III-skin II-skin I, skin IV-skin V-skin VI. Before welding each skin, the spiral tube guide assembly at the corresponding position of the skin is removed from the mandrel; the welding of each skin and the disassembly of the guide block are completed in sequence.

[0053] When welding the two base plate assemblies, the relative positions of the two base plate assemblies with the spiral cylinder and the relative angular positions with the spiral tube should be ensured.

[0054] During the demolding operation, a demolding fixture is used to fix the auger cylinder, and then a hand-operated hoist is used to pull the mandrel out of the auger cylinder to complete the demolding operation.

[0055] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this invention does not imply that the components are required to be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0057] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A spiral cylinder welding and forming device, characterized in that, For welding and forming of a spiral cylinder, the spiral cylinder includes an outer cylinder formed by a skin and four sets of spiral tubes arranged in a spiral shape inside the outer cylinder. The spiral tubes are evenly distributed in the circumferential direction. The spiral tubes are fixedly connected to the outer cylinder by multiple sets of left and right stiffening plates. Multiple sets of collar assemblies are arranged at intervals along the axial direction inside the outer cylinder to support the outer cylinder and connect to the spiral tubes and the left and right stiffening plates respectively. Includes: Support components; A mandrel, the two ends of which are rotatably connected to a support base; Multiple sets of spiral tube guide assemblies are spaced apart on the mandrel along the mandrel axis. Each spiral tube guide assembly has multiple limiting grooves evenly distributed in the circumferential direction, and the limiting grooves on each spiral tube guide assembly together form a limiting structure on the mandrel surface that matches the spiral tube profile. Multiple sets of clamping assemblies are respectively arranged on both sides of the spiral tube guide assembly for fixing the spiral tube; The collar assembly is fitted onto the mandrel and positioned between the spiral tube guide assemblies.

2. The spiral cylinder welding and forming apparatus according to claim 1, characterized in that, Positioning rings are respectively fitted at both ends of the mandrel. The positioning rings are fitted onto the mandrel, and positioning notches matching the spiral tube are provided on the inner circumference of the positioning rings.

3. The spiral cylinder welding and forming apparatus according to claim 1, characterized in that, The spiral tube guide assembly includes a plurality of guide blocks evenly distributed along the circumference of the mandrel, and a limiting groove is formed between the guide blocks.

4. The spiral cylinder welding and forming apparatus according to claim 1, characterized in that, The clamping assembly includes multiple clamping blocks arranged circumferentially along the mandrel. The clamping blocks have a clamping structure, and each end of the clamping block has a connecting hole for fixed connection with the mandrel. A clamping notch matching the spiral tube is provided on the clamping block.

5. The spiral cylinder welding and forming apparatus according to claim 1, characterized in that, A release layer is provided on the mandrel.

6. The spiral cylinder welding and forming apparatus according to claim 1, characterized in that, It also includes a spiral scribing cylinder, which can be fitted onto the mandrel, and has multiple scribing grooves along its circumference that match the line shape of the spiral tube.

7. The spiral cylinder welding and forming apparatus according to claim 1, characterized in that, The mandrel and the support base are connected by a detachable connection structure.

8. A method for welding and forming a spiral cylinder, characterized in that, The welding operation of a spiral cylinder using the spiral cylinder welding and forming apparatus according to any one of claims 1-7 includes the following steps: Position and install the spiral tube onto the mandrel; Weld the collar assembly to the spiral tube; Weld the left stiffening plate and the right stiffening plate to the spiral tube and the collar assembly respectively, and remove the clamping assembly from the mandrel; Weld the skin to the left stiffening plate, right stiffening plate and collar assembly respectively, and remove the spiral tube guide assembly from the mandrel; Remove the mandrel and the welded spiral cylinder as a whole from the support base; Demold the spiral cylinder off the mandrel.

9. The spiral cylinder welding and forming method according to claim 8, characterized in that, The steps for positioning and installing the spiral tube onto the mandrel include: Scribing lines on the mandrel to determine the axial positioning lines of the spiral tube guide assembly, clamping assembly, and collar assembly, as well as the circumferential positioning lines of the spiral tube guide assembly; Slide the collar assemblies onto the mandrel and fix the spiral tube guide assembly onto the mandrel; The spiral tubes are positioned and installed on the mandrel, and then fixed by the clamping assembly.

10. The spiral cylinder welding and forming method according to claim 8, characterized in that, The steps for welding the skin to the left stiffening plate, right stiffening plate, and collar assembly respectively include: The skins are welded in the following order: skin III-skin IV-skin II-skin V-skin I-skin VI. The positional relationship of the skins on the spiral cylinder is that skin III-skin II-skin I and skin IV-skin V-skin VI are symmetrically arranged from the center outwards. Before welding each skin, the spiral tube guide assembly at the corresponding position of the skin is removed from the mandrel.

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