Manufacturing method of marine roller device

Abstract

The invention relates to the technical field of ship construction, and discloses a manufacturing method of a marine roller device, which comprises the following steps: lofting; blanking is conducted; edge rolling; performing correction; machining treatment is conducted, specifically, machining surface milling treatment is conducted on the driving side; the non-driving side is subjected to face milling and drilling treatment; the driving side assembly is placed on the horizontal jig frame; driving side vertical T rows and diagonal bracing pipes; assembling an annular stiffening plate; assembling and welding the shell plate; an annular stiffening plate is assembled; assembling and welding the shell plate; an annular stiffening plate is assembled; assembling and welding the shell plate; assembling and layering the annular stiffening plates; assembling and welding the shell plate; the non-driving side small assembly is assembled and welded on the shell plate; before the whole body is lifted to the top of the cylinder body, the center of the driving side and the horizontal line are guided to the top through laser, then after the center of the non-driving side is lifted to the point position, symmetric spot welding fixing is conducted, concentricity and parallelism are monitored, and full-length welding is conducted. The concentricity of the centers of the driving side and the non-driving side is controlled, the roller does not turn over, difficulty is reduced, and cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and specifically to a manufacturing method of a marine drum device. Background Art

[0002] In recent years, with the change of the overall marine environment in the shipbuilding industry, the orders for floating production storage and offloading vessels (FPSOs) have been increasing in China. As a key structure among them, the marine drum device is used to transport crude oil to shuttle tankers. In most cases, there are at least 2 hose reel devices (bow side and stern side) on a ship. The shell plate thickness of the drum device generally does not exceed 15 mm, belonging to a thin plate structure. However, there are T-shaped steels vertically and multiple ring stiffening plates horizontally inside the drum, with a large amount of welding, and strict control of welding deformation is required. The opening between the driving side and the non-driving side of the drum device is more than 10 meters long. The control of concentricity within this more than 10-meter opening distance will directly affect the working state of the drum. Therefore, machining treatment is required at both ends of the driving side and the non-driving side.

[0003] In document CN 117161679 A, a manufacturing process method of an oil transfer hose winch reel structure is disclosed. The hose winch reel is divided into two ends, first grouped, then machined separately, and finally turned over for general assembly and closing. This method cannot guarantee the control of the verticality of the reel, and it is easy to have the situation of offset. Moreover, during the process, turning over is required. Since the cylinder shell plate itself belongs to a thin-walled structure, turning over will cause deformation of the structure. If deformation needs to be reduced, it is necessary to install supports for machining, and these supports need to be cut off after turning over, which is time-consuming and laborious.

[0004] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the Invention

[0005] In order to solve the above problems, the present invention discloses a manufacturing method of a marine drum device. First, assemble and weld the driving side bottom plate, the outer H-shaped steel and the stiffening plates, then fix them on the jig, use a mobile machine tool to machine one end of the driving side structure, and then, taking the milled surface as the reference, assemble and weld the coiled shell plates layer by layer. Finally, assemble the machined non-driving side chassis to the top of the reel, adjust the parallelism of the two machined surfaces and the concentricity of the cylinder center. After meeting the requirements, weld the non-driving side chassis. This processing method can not only effectively control the concentricity between the driving side and the non-driving side, but also the verticality of the reel itself can meet the requirements. Moreover, during the process, there is no turning-over process for the drum device, greatly reducing the manufacturing difficulty and saving the manufacturing cost.

[0006] The technical solution of the present invention is a manufacturing method of a marine drum device, including the following steps: 1. Lofting: The layout work is carried out according to the customer's construction drawings. When drawing the processing sketch, the dimensions on the drawing must be carefully checked, and welding shrinkage and milling processing allowances should be added. At the same time, different work orders should be set according to different areas; 2. Cutting: Before cutting, you should first confirm the material and be familiar with the process requirements, then cut the materials according to the layout drawing, cutting processing order and part sketch, and do a good job of transplanting material traceability after cutting; 3. Curl: Roll the shell plate of the roller device according to the rolling radius, and pay attention to the roundness and direction of the rolling; Fourth, group the drive side and non-drive side separately, and then calibrate them to ensure that the flatness of the drive side and non-drive side structures does not exceed 3mm, and draw a 1 / 4 reference line; 5. Machining: a.Drive side Fix it on the tire frame, adjust the overall elevation, and after leveling, fix the mobile machining equipment at its center and start machining and milling to meet the processing requirements of the drawing; b. Non-drive side Fix it on the machine tool, adjust the overall elevation, and perform milling and drilling according to the reference line to meet the processing requirements of the drawing; 6. Middle group structure production: Step 1: Place the machined drive side assembly on a horizontal tire frame and adjust the overall level; Step 2: Using the milling surface machined on the drive side as the horizontal reference, vertically install the 12 T-rows and diagonal brace pipes on the outside; Step 3: Assemble three layers of annular stiffeners in the three notches of the first layer of the T row; Step 4: Assemble and weld the first layer of shell plates after external curling on the T row outside the annular stiffener in step 3, starting from the bottom of the T row; Step 5: Assemble three more layers of annular stiffening plates in the notches of the T row above the annular stiffening plates in step 3; Step 6: Assemble and weld the second layer of shell plates after external curling on the T-row outside the annular stiffening plate in step 5; Step 7: Install two more layers of annular stiffening plates in the notches of the T row above the annular stiffening plates in step 5; Step 8: Assemble and weld the third layer of shell plates after external curling on the T-row outside the annular stiffening plate in step 7; Step 9: Assemble and layer the annular stiffening plate; Step 10: Assemble and weld the shell plate and annular stiffening plate after the fourth layer of external curling; Step 11: Assemble and weld the machined non-drive side sub-assembly on the 4th layer of shell plates. Before lifting the whole assembly to the top of the cylinder body, first use a laser to guide the center and horizontal line of the drive side to the top surface. Then, lift the center of the non-drive side to this position. First, fix it by spot welding in a multi-person and symmetric manner, and add temporary gusset plates for fixation. After fixation, monitor the concentricity and parallelism between the drive side center and the non-drive side center, ensure that it is controlled within 2 mm after spot welding, and then perform full welding symmetrically.

[0007] Preferably, in step three of rolling into a circle, each layer of shell plates consists of 3 plates. The 3 plates are rolled into a circle separately. Before rolling into a circle, draw the position line of the annular stiffening plate on the steel plate. After single-piece rolling into a circle, perform a roundness adjustment process.

[0008] By adopting the above technical solution, first ensure that the radian of the single-piece shell plate meets the requirements, providing a technical guarantee for the roundness after the overall welding of the subsequent 3 plates.

[0009] Preferably, in the welding of the sub-assembly in step four, for the welding of the flange on the drive side, arrange 4 welders to weld symmetrically at the same time. After the flange welding, perform post-weld electric heating treatment on the weld seam.

[0010] Preferably, in step 1 of step six, after adjusting the level, perform a tire sealing treatment on the entire drive side assembly.

[0011] Preferably, in step 2 of step six, when the 12 T-rows are erected, add temporary diagonal bracing pipes to each T-row.

[0012] Preferably, the T-rows in step 2 of step six are radially distributed in a radiation pattern centered on the center of the drive side structure and perpendicular to the drive side structure. One end of the diagonal bracing pipe is located inside the T-row, and the other end is located on the drive side structure. Centered on the center of the drive side structure, they are located on the same circular ring in a radiation pattern. A right triangle is formed among the diagonal bracing pipe, the T-row, and the drive side structure.

[0013] Preferably, in steps 4, 6, 8, and 10 of step six, when welding the shell plate and the annular stiffening plate, adopt a symmetric welding method.

[0014] Preferably, in steps 6 and 8 of step six, the adjacent shell plates are adjacent to each other, and the adjacent shell plates are welded together, also at the position of the T-row.

[0015] Preferably, in step 11 of step six, use a total station to monitor the concentricity and flatness between the drive side center and the non-drive side center, ensure that it is within 2 mm during installation, and first perform local fixation by spot welding, and then perform final welding by symmetric welding.

[0016] Preferably, during the welding process in step 11 of step six, the data is monitored in real time. If there are any deviations, adjustments are made in a timely manner. After all the welding is completed, the temporary backing plates are cut off. When cutting, be careful not to damage the base material. Leave a root of 2.5 - 3.5 mm for grinding. Finally, measure the data again to ensure that the concentricity and parallelism between the center of the driving side and the center of the non - driving side after welding do not exceed 3 mm.

[0017] Advantages of the present invention: 1. Before fixing the T - row on the driving - side structure in the present invention, the driving - side structure line is processed by a mobile machining device, and the milled surface is used as the reference surface for subsequent assembly. The milled surface is flatter. Using it as the horizontal reference surface can effectively ensure that the T - row is perpendicular to the driving - side structure, guarantee the perpendicularity of the later installation, and effectively control the dimensions.

[0018] 2. In the present invention, by directly installing the T - row on the driving side and then installing the stiffening plate and the shell plate on the T - row, there is no need to turn over the components during the whole process. This not only reduces the production and coordination of tooling, but also avoids the turning over of super - large and ultra - thin components, reducing the possibility of deformation, being safe and reliable, and improving work efficiency.

[0019] 3. In the present invention, the center and horizontal line of the driving side are led to the top surface by laser. Then, after lifting the center of the non - driving side to this point, first fix it by spot welding in a multi - person and symmetric manner and add temporary backing plates for fixation, which can effectively ensure that the concentricity and parallelism between the center of the driving side and the center of the non - driving side meet the tolerance requirements on the drawing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three - dimensional schematic diagram of an embodiment of the present invention; Figure 2 is Figure 1 the front view of Figure 3 is a detailed drawing of the driving - side structure; Figure 4 is a schematic diagram of installing the T - row and the first - layer annular stiffening plate; Figure 5 is a schematic diagram of installing the shell plate; Figure 6 is a detailed drawing of the non - driving - side structure.

[0021] Wherein: 1. Non - driving side, 2. Driving side, 3. Shell plate, 21. T - row, 22. Annular stiffening plate, 23. Diagonal bracing pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Such as Figure 1-2As shown, a method for manufacturing a marine roller device comprises the following steps: 1. Lofting: The layout work is carried out according to the customer's construction drawings. When drawing the processing sketch, the dimensions on the drawing must be carefully checked, and welding shrinkage and milling processing allowances should be added. At the same time, different work orders should be set according to different areas; 2. Cutting: Before cutting, you should first confirm the material and be familiar with the process requirements, then cut the materials according to the layout drawing, cutting processing order and part sketch, and do a good job of transplanting material traceability after cutting; 3. Curl: The shell plate 3 of the roller device is rolled according to the rolling radius, and attention is paid to the roundness and direction of the rolling. The shell plate 3 of each layer is composed of 3 plates, and the 3 plates are rolled separately. Before rolling, the position line of the annular stiffening plate 22 is marked on the steel plate. After the single plate is rolled, it is rounded. First, ensure that the curvature of the single shell plate meets the requirements, so as to provide technical guarantee for the roundness of the subsequent 3 plates after integral welding. Fourth, divide the driving side 2 and the non-driving side 1 into groups first, and then calibrate them to ensure that the flatness of the driving side 2 and the non-driving side 1 structures does not exceed 3mm, and draw a 1 / 4 reference line; for welding of small components, there is a flange welding on the driving side 2, and 4 welders are arranged to weld symmetrically at the same time. After the flange is welded, the weld is subjected to post-weld electric heating treatment; this can reduce welding deformation and control the overall flatness; 5. Machining: a.Drive side like Figure 3 As shown, it is fixed on the tire frame, the overall elevation is adjusted, and after it is leveled, the mobile machining equipment is fixed at its center position and the machining and milling surface treatment is started to meet the processing requirements of the drawing; b. Non-drive side Fix it on the machine tool, adjust the overall elevation, and perform milling and drilling according to the reference line to meet the processing requirements of the drawing; The milled surface is used as the reference surface for subsequent assembly. The milled surface is smoother. Using it as a horizontal reference surface can effectively ensure that the T row is vertical on the drive side structure, ensure the verticality of the subsequent installation, and effectively control the size; 6. Middle group structure production: Step 1: Place the machined drive side assembly on a horizontal tire frame and adjust the level of the whole assembly. After adjusting the level, seal the whole drive side assembly to ensure the subsequent assembly benchmark; Step 2: If Figure 4As shown, taking the milled surface machined on the driving side 2 as the horizontal reference, there are 12 T-rows 21 and diagonal bracing pipes on the outer vertical side. When the 12 T-rows 21 are erected, a temporary diagonal bracing pipe 23 is added to each T-row 21. The T-rows 21 are radially distributed perpendicular to the structure of the driving side 2 with the center of the structure of the driving side 2 as the center, in a radial pattern. One end of the diagonal bracing pipe 23 is located inside the T-row 21, and the other end is located on the structure of the driving side 2. With the center of the structure of the driving side 2 as the center, they are radially located on the same circular ring. A right triangle is formed among the diagonal bracing pipe 23, the T-row 21, and the structure of the driving side 2.

[0024] Step 3: Assemble 3 layers of annular stiffening plates 22 in the three slots of the first layer of the T-row 21; Step 4: As Figure 5 shown, assemble and weld the shell plate 3 after the first layer of external curling on the T-row 21 outside the annular stiffening plate 22 in Step 3, starting from the bottom of the T-row 21; Step 5: Assemble another 3 layers of annular stiffening plates 22 in the slots of the T-row 21 above the annular stiffening plate 22 in Step 3; Step 6: Assemble and weld the shell plate 3 after the second layer of external curling on the T-row 21 outside the annular stiffening plate 22 in Step 5; Step 7: Assemble another 2 layers of annular stiffening plates 22 in the slots of the T-row 21 above the annular stiffening plate 22 in Step 5; Step 8: Assemble and weld the shell plate 3 after the third layer of external curling on the T-row 21 outside the annular stiffening plate 22 in Step 7; Step 9: Assemble the annular stiffening plates 22 in layers; Step 10: Assemble and weld the shell plate 3 after the fourth layer of external curling and the annular stiffening plate 22; Step 11: As Figure 6As shown, the machined non-driving side 1 sub-assembly is assembled and welded onto the 4th layer of shell plate 3. Before hoisting the whole assembly to the top of the cylinder body, first use a laser to guide the center and horizontal line of the driving side 2 to the top surface. Then, after hoisting the center of the non-driving side 1 to this position, first use multiple people to fix it by spot welding symmetrically and add temporary stay plates for fixation. After fixation, monitor the concentricity and parallelism between the center of the driving side 2 and the center of the non-driving side 1, ensure that it is controlled within 2 mm after spot welding, and then perform full welding symmetrically. Use a total station to monitor the concentricity and flatness between the center of the driving side 2 and the center of the non-driving side 1, ensure that it is within 2 mm during installation, and first fix it locally by spot welding, and then perform final welding by symmetric welding. During the welding process, monitor the data in real time. If there is any deviation, adjust it in time. After all welding is completed, cut off the temporary stay plates. When cutting, do not cut the base material. Leave a root of about 3 mm for grinding. Finally, measure the data again to ensure that the concentricity and parallelism between the driving side center and the non-driving side center after welding do not exceed 3 mm. After flange welding, post-weld electric heating treatment needs to be carried out on the weld to eliminate welding residual stress and better control subsequent welding deformation. As Figure 4 shown, the T row 21 in step 2 of step six is radially distributed in a radial pattern centered on the center of the driving side 2 structure and perpendicular to the driving side 2 structure. One end of the diagonal brace tube 23 is located inside the T row 21, and the other end is located on the driving side 2 structure. Centered on the center of the driving side 2 structure, it is radially located on the same circular ring. A right triangle is formed between the diagonal brace tube 23, the T row 21, and the driving side 2 structure. Through the support of the diagonal brace tube 23, the perpendicularity of the T row 21 can be guaranteed, and the overall dimensions can be controlled.

[0025] In steps 4, 6, 8, and 10 of step six, when welding the shell plate 3 and the annular stiffening plate 22, a symmetric welding method is adopted. In steps 6 and 8 of step six, the adjacent shell plates 3 are next to each other, and the adjacent shell plates 3 are welded together. Similarly, at the position of the T row 21, welding deformation can be reduced and the roundness of the whole cylinder can be controlled.

[0026] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the said principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. A method for manufacturing a marine roller device, characterized in that: The following steps are involved:

1. Lofting: The layout work is carried out according to the customer's construction drawings. When drawing the processing sketch, the dimensions on the drawing must be carefully checked, and welding shrinkage and milling processing allowances should be added. At the same time, different work orders should be set according to different areas; 2. Cutting: Before cutting, you should first confirm the material and be familiar with the process requirements, then cut the materials according to the layout drawing, cutting processing order and part sketch, and do a good job of transplanting material traceability after cutting; 3. Curl: Roll the shell plate of the roller device according to the rolling radius, and pay attention to the roundness and direction of the rolling; Fourth, group the drive side and non-drive side separately, and then calibrate them to ensure that the flatness of the drive side and non-drive side structures does not exceed 3mm, and draw a 1 / 4 reference line; 5. Machining: a.Drive side Fix it on the tire frame, adjust the overall elevation, and after leveling, fix the mobile machining equipment at its center and start machining and milling to meet the processing requirements of the drawing; b. Non-drive side Fix it on the machine tool, adjust the overall elevation, and perform milling and drilling according to the reference line to meet the processing requirements of the drawing; 6. Middle group structure production: Step 1: Place the machined drive side assembly on a horizontal tire frame and adjust the overall level; Step 2: Using the milling surface machined on the drive side as the horizontal reference, vertically install the 12 T-rows and diagonal brace pipes on the outside; Step 3: Assemble three layers of annular stiffeners in the three notches of the first layer of the T row; Step 4: Assemble and weld the first layer of shell plates after external curling on the T row outside the annular stiffener in step 3, starting from the bottom of the T row; Step 5: Assemble three more layers of annular stiffening plates in the notches of the T row above the annular stiffening plates in step 3; Step 6: Assemble and weld the second layer of shell plates after external curling on the T-row outside the annular stiffening plate in step 5; Step 7: Install two more layers of annular stiffening plates in the notches of the T row above the annular stiffening plates in step 5; Step 8: Assemble and weld the third layer of shell plates after external curling on the T-row outside the annular stiffening plate in step 7; Step 9: Assemble and layer the annular stiffening plate; Step 10: Assemble and weld the shell plate and annular stiffening plate after the fourth layer of external curling; Step 11: Assemble and weld the machined small components on the 4th shell plate; before lifting the whole to the top of the barrel, first use the laser to guide the center and horizontal line of the driving side to the top, and then lift the center of the non-driving side to this point, first use multiple people and symmetrical methods to spot weld and fix it, and add a temporary horse plate to fix it. After fixation, monitor the concentricity and parallelism of the driving side center and the non-driving side center to ensure that the spot welding is controlled within 2mm, and then perform full welding symmetrically.

2. The method for manufacturing a marine roller device according to claim 1, characterized in that: In the step 3, each layer of the shell plate is composed of 3 plates, and the 3 plates are rolled separately. Before rolling, the position line of the annular stiffened plate is marked on the steel plate. After the single plate is rolled, it is rounded again.

3. The method for manufacturing a marine roller device according to claim 1, characterized in that: In the welding of the small components in step 4, there is welding of the flange on the driving side, and 4 welders are arranged to weld symmetrically at the same time. After the flange is welded, the weld is subjected to post-weld electrical heating treatment.

4. The method for manufacturing a marine roller device according to claim 1, characterized in that: In step 1 of step 6, after adjusting the level, the entire drive side assembly is sealed.

5. The method for manufacturing a marine drum device according to claim 1, characterized in that: In step 2 of step 6, when the 12 T rows are erected, a temporary diagonal bracing pipe is added to each T row.

6. The method for manufacturing a marine roller device according to claim 1, characterized in that: The T row in step 2 of step 6 is centered on the center of the driving side structure and is radially distributed perpendicular to the driving side structure. One end of the diagonal brace tube is located on the inner side of the T row, and the other end is located on the driving side structure. It is centered on the center of the driving side structure and is radially located on the same circular ring. A right triangle is formed between the diagonal brace tube, the T row and the driving side structure.

7. The method for manufacturing a marine roller device according to claim 1, characterized in that: In steps 4, 6, 8 and 10 of step 6, a symmetrical welding method is adopted when welding the shell plate and the annular stiffening plate.

8. The method for manufacturing a marine drum device according to claim 1, characterized in that: In the step six, the adjacent shell plates in step 6 and step 8 are close to each other, and the adjacent shell plates are welded together, also at the position of the T row.

9. The method for manufacturing a marine drum device according to claim 1, characterized in that: In step 11 of step 6, a total station is used to monitor the concentricity and flatness of the center of the driving side and the center of the non-driving side to ensure that they are within 2 mm during installation, and spot welding is used for local fixation first, and then symmetrical welding is used for final welding.

10. The method for manufacturing a marine drum device according to claim 1, characterized in that: In step 11 of step 6, during the welding process, the data is monitored in real time. If there is any deviation, it is adjusted in time. After all welding is completed, the temporary plate is cut off. When cutting, be sure not to cut the parent material. Leave 2.5-3.5mm at the root for grinding. Finally, measure the data to ensure that the concentricity and parallelism of the center of the driving side and the center of the non-driving side after welding do not exceed 3mm.

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