CN110369891B - Method for manufacturing conical box structural member - Google Patents
Method for manufacturing conical box structural member Download PDFInfo
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- CN110369891B CN110369891B CN201910466986.4A CN201910466986A CN110369891B CN 110369891 B CN110369891 B CN 110369891B CN 201910466986 A CN201910466986 A CN 201910466986A CN 110369891 B CN110369891 B CN 110369891B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a method for manufacturing a conical box structural member, and belongs to the field of structural member manufacturing. The method comprises the following steps: providing an upper cover plate, a conical box body plate, a ring, a rib plate group, side sealing plates, a lower base plate, a bottom sealing plate and small rib plates; respectively assembling the conical box plate, the ring and the rib plate group on the front surface of the upper cover plate; welding seams among the conical box body plates, the ring and the upper cover plate; respectively assembling a side sealing plate and a lower bottom plate on the front surface of an upper cover plate; welding seams between the upper cover plate, the conical box body plate and the ring and the rib plate group, between the upper cover plate and the rib plate group and the side sealing plates, and between the ring and the rib plate group and the lower bottom plate are welded; respectively welding a bottom sealing plate and a small rib plate on the front surface of the upper cover plate to obtain a main body structure of the conical box body, wherein the bottom sealing plate covers the rib plate group, the large end of the bottom sealing plate is connected with the side sealing plate, and the small end of the bottom sealing plate is connected with the peripheral wall of the lower bottom plate; and annealing the main structure of the conical box body to form the structural member of the conical box body.
Description
Technical Field
The invention relates to the field of structural member manufacturing, in particular to a manufacturing method of a conical box structural member.
Background
The full-rotation rudder propeller device comprises a propulsion unit (such as a propeller), a rotation unit and a brake assembly which are connected in sequence. The rotary unit comprises a rotary shaft, a rotary support and a conical box body structural member for mounting the rotary shaft and the rotary support. The conical box structural member comprises an upper cover plate and an inner-outer two-layer plate arranged on one side of the upper cover plate. The inner layer plate is a cone cylinder, the upper end of the outer layer plate is a straight cylinder, and the lower end of the outer layer plate is a cone cylinder. Criss-cross rib plates for reinforcing and connecting are arranged between the two layers of plates.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems: because the upper cover plate is arranged on the ship body, the weight of the whole full-rotation rudder propeller device is borne by the upper cover plate, the conical box body is matched with the rotating shaft, and the precision requirement of the structural part of the conical box body is higher. However, the number of welding seams of the whole component is as many as four to hundred, the number of welding seams is large, and the control of welding deformation is difficult.
Disclosure of Invention
The embodiment of the invention provides a manufacturing method of a conical box structural member, which can play a role in reducing deformation caused by welding of a rib plate group. The technical scheme is as follows:
the invention provides a method for manufacturing a conical box structural member, which comprises the following steps:
providing an upper cover plate, a conical box body plate, a ring, a rib plate group, side sealing plates, a lower base plate, a bottom sealing plate and small rib plates, wherein the upper cover plate is provided with a stepped hole, the conical box body plate and the bottom sealing plate are both conical cylinders, the side sealing plates are strip-shaped plates, and the lower base plate is a circular ring;
respectively assembling the conical box body plate, the ring and the rib plate group to the front surface of the upper cover plate, wherein the conical box body plate covers the stepped hole, the ring is installed at the small end of the conical box body plate, the rib plate group comprises a plurality of rib plates, the first end of each rib plate is positioned on the upper cover plate, the second end of each rib plate is positioned on the conical box body plate and abuts against the ring, and the stepped hole, the conical box body and the ring are coaxial;
welding the welds between the conical box plate, the ring, and the upper cover plate;
the side sealing plates and the lower base plate are respectively assembled on the front surface of the upper cover plate, the rib plates are positioned in the side sealing plates, the first ends of the rib plates are respectively abutted against the side sealing plates, and the lower base plate is sleeved on the ring and covers the rib plate group;
welding the upper cover plate, the conical box body plate and welding seams between the ring and the rib plate group, between the upper cover plate and the rib plate group and the side sealing plates, and between the ring and the rib plate group and the lower bottom plate;
respectively welding the bottom sealing plate and the small rib plate to the front surface of the upper cover plate to obtain a main body structure of the conical box body, wherein the bottom sealing plate covers the rib plate group, the large end of the bottom sealing plate is connected with the side sealing plate, the small end of the bottom sealing plate is connected with the peripheral wall of the lower bottom plate, and the small rib plate is positioned in the conical box body plate and positioned on the front surface of the upper cover plate;
and annealing the main structure of the conical box body to form a conical box body structural part.
Optionally, before the assembling the tapered box body plate, the ring, and the rib plate group to the front face of the upper cover plate, respectively, the method further comprises:
and carrying out pre-reversible deformation treatment on the upper cover plate.
Optionally, before the assembling the side sealing plates and the lower base plate to the front surface of the upper cover plate respectively, the method further comprises:
rolling the side sealing plates to enable the side sealing plates to be enclosed into a cylinder;
and removing the part with the excessive length in the side sealing plate, and reserving the assembly allowance of the target length at one end of the side sealing plate after the excessive length is removed.
Optionally, the assembling the side sealing plates and the lower base plate to the front surface of the upper cover plate respectively comprises:
enclosing the side sealing plate with the redundant length removed outside the rib plate group;
spot welding the side sealing plate and the rib plate group after the redundant length is removed;
folding the side sealing plate with the redundant length removed, and removing redundant assembly allowance;
the lower base plate is fitted to the front surface of the upper cover plate.
Optionally, the upper cover plate is an eccentric ring, the rib plate group includes eight pairs of rib plates, a first pair of rib plates in the eight pairs of rib plates are opposite and are all located on a diameter of the cross section of the upper cover plate and passing through the center of the stepped hole, each pair of rib plates in the other seven pairs of rib plates except the first pair of rib plates are symmetrically distributed relative to the diameter of the cross section of the upper cover plate and passing through the center of the stepped hole, the length direction of each rib plate in the eight pairs of rib plates is overlapped with the diameter of the cross section of the ring, and an included angle between the length directions of two adjacent rib plates is 22.5 °.
Optionally, the welding the upper cover plate, the tapered box body plate, and the weld between the ring and the rib plate group respectively includes:
and welding the upper cover plate, the conical box body plate and the welding seams between the ring and the rib plate groups respectively in sequence according to the distribution sequence of each pair of rib plates.
Optionally, before the welding the bottom sealing plate and the small rib plate to the front surface of the upper cover plate respectively, the method further includes:
the bottom sealing plate is divided into a first section, a second section, a third section and a fourth section which are connected in sequence, the joints of the first section, the second section and the fourth section correspond to the rib plates at corresponding positions respectively, the first section corresponds to the position covered by seven continuously distributed rib plates, the second section corresponds to the position covered by three continuously distributed rib plates, the third section corresponds to the position covered by seven continuously distributed rib plates, the fourth section corresponds to the position covered by three continuously distributed rib plates, and the three rib plates corresponding to the second section and the three rib plates corresponding to the fourth end are three rib plate pairs of the other seven rib plate pairs;
and respectively welding the first section, the fourth section and the small rib plate to the front surface of the upper cover plate.
Optionally, the annealing the tapered box body structure includes:
preparing a plurality of vent holes on an outer plate of the main body structure of the conical box body, wherein the outer plate is a shell formed by the side sealing plates, the bottom sealing plate and the lower bottom plate;
annealing the main structure of the conical box body;
and plugging the plurality of vent holes after finishing annealing.
Optionally, after the annealing the conical box body structure, the method further comprises:
respectively carrying out an air tightness test on a cavity between the upper cover plate and the conical box body plate and a cavity between the conical box body plate and the outer plate;
and when the target test result is not achieved, removing the unqualified welding line, and welding the removed welding line again.
Optionally, after the annealing the conical box body structure, the method further includes:
providing a plurality of lifting lugs;
and welding the plurality of lifting lugs to the back surface of the upper cover plate.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the rib plate groups are clamped in the space formed by the upper cover plate, the welded conical box body plate, the ring, the side sealing plate and the lower base plate, the space has a certain limiting effect on the rib plate groups, the welding seams of the rib plate groups are the largest, and the deformation caused by welding of the rib plate groups can be reduced under the limiting effect; and because the bottom sealing plate is not assembled, the bottom sealing plate can be welded from the assembly position of the bottom sealing plate, so that convenience is brought to welding.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a rudder propeller device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a conical box structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a flow chart of a method for manufacturing a conical structural box according to an embodiment of the present invention;
FIG. 5 is a schematic view of the pressing direction of the upper cover plate according to the embodiment of the present invention;
FIG. 6 is a schematic distribution diagram of eight pairs of rib plates according to an embodiment of the present invention;
FIG. 7 is a schematic view of a bottom closure plate according to an embodiment of the present invention;
FIG. 8 is a schematic view of the position of the weld between the upper cover plate and the conical box plate according to the embodiment of the present invention;
FIG. 9 is a schematic view of the position of the weld between the upper cover plate and the side seal plate according to the embodiment of the present invention;
FIG. 10 is a flow chart of a method for manufacturing a conical structural box member according to an embodiment of the present invention;
in the drawing, a propelling unit 81, a rotating unit 82, a brake assembly 83, a conical box structure 84, a box cover 85, an upper cover plate 1, a stepped hole 1a, side sealing plates 2, bottom sealing plates 3, first to fourth sections 31-34, a lower bottom plate 4, a ring 5, a conical box plate 6, small rib plates 7, rib plate groups 9, lifting lugs 17, a lubricating oil tank base 19, a safety balance valve block base 21 and a lubricating transition valve block base 24 are arranged.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
To facilitate understanding of the technical solutions provided by the embodiments of the present invention, the function and structure of the tapered box structure 84 will be described first. The conical box structure 84 is an important force-bearing member of the revolving unit 82, and as shown in fig. 1, the upper part of the conical box structure 84 is connected with the brake assembly 83, and the lower part is connected with the propulsion unit 81. The conical housing is in close fitting relation with the swivel shaft of swivel unit 82, a swivel bearing (not shown) and housing cover 85. The upper cover plate 1 of the conical box structure 84 is mounted on the hull, and the weight of the entire rudder propeller device is borne by the upper cover plate.
Presently, the conical box structure 84 includes two configurations, one being a concentric configuration (see fig. 1) and the other being an eccentric configuration (see fig. 2 and 3). The method for manufacturing the conical box structure 84 according to the embodiment of the present invention is applicable to both structures.
The construction of the conical box structure 84 will be described by taking an eccentric construction as an example. As shown in fig. 2 and 3, the conical box structure 84 includes an upper cover plate 1, a conical box plate 6, a ring 5, a rib group 9, side sealing plates 2, a lower bottom plate 4, a bottom sealing plate 3, and a small rib 7. The outer circle diameter of the upper cover plate 1 may be 3010mm and the inner circle diameter may be 2800 mm. The upper cover plate 1 is provided with a stepped hole 1a, the stepped hole 1a is formed by stacking two grooves with different calibers, one groove is used for being matched with the box body cover 85, and the other groove faces the propelling unit 81. The conical box body plate 6 and the bottom sealing plate 3 are both conical cylinders, the assembled side sealing plates 2 are cylinders, and the lower bottom plate 4 is a circular ring 5. The tapered box plate 6 is covered on the stepped hole 1a, the ring 5 is mounted on the small end of the tapered box plate 6, and the stepped hole 1a, the tapered box and the ring 5 are coaxial. The rib plate group 9 comprises a plurality of rib plates, the plurality of rib plates are positioned in the side sealing plates 2, the first ends of the rib plates are respectively abutted against the side sealing plates 2, and the second ends of the rib plates are positioned on the conical box body plate 6 and are abutted against the ring 5. The lower bottom plate 4 is sleeved on the ring 5 and covers the rib plate group 9. The bottom sealing plate 3 covers the rib plate group 9, the large end of the bottom sealing plate 3 is connected with the side sealing plate 2, the small end of the bottom sealing plate 3 is connected with the peripheral wall of the lower bottom plate 4, and the small rib plate 7 is positioned in the conical box body plate 6 and positioned on the front surface of the upper cover plate 1.
Fig. 4 illustrates a method for manufacturing a tapered box structure 84 according to an embodiment of the present invention. Referring to fig. 4, the process flow includes the following steps.
The upper cover plate 1 is provided with a stepped hole 1a, the conical box body plate 6 and the bottom sealing plate 3 are conical cylinders, the side sealing plates 2 are strip-shaped plates, and the lower bottom plate 4 is a circular ring 5.
The tapered box body plate 6 covers the stepped hole 1a, the ring 5 is installed at the small end of the tapered box body plate 6, the rib plate group 9 comprises a plurality of rib plates, the first end of each rib plate is located on the upper cover plate 1, the second end of each rib plate is located on the tapered box body plate 6 and abuts against the ring 5, and the stepped hole 1a, the tapered box body and the ring 5 are coaxial.
And 104, respectively assembling the side sealing plates 2 and the lower base plate 4 to the front surface of the upper cover plate 1.
The rib plates are positioned in the side sealing plates 2, the first ends of the rib plates are respectively abutted against the side sealing plates 2, and the lower base plate 4 is sleeved on the ring 5 and covers the rib plate group 9.
And 105, welding the upper cover plate 1, the conical box body plate 6, welding seams between the ring 5 and the rib plate group 9, welding seams between the upper cover plate 1 and the rib plate group 9 and the side sealing plates 2, and welding seams between the ring 5 and the rib plate group 9 and the lower bottom plate 4.
And step 106, respectively welding the bottom sealing plate 3 and the small rib plate 7 to the front surface of the upper cover plate 1 to obtain the main body structure of the conical box body.
The bottom sealing plate 3 covers the rib plate group 9, the large end of the bottom sealing plate 3 is connected with the side sealing plate 2, the small end of the bottom sealing plate 3 is connected with the peripheral wall of the lower bottom plate 4, and the small rib plate 7 is positioned in the conical box body plate 6 and positioned on the front surface of the upper cover plate 1.
The welding seam between the conical box body plate 6, the ring 5 and the upper cover plate 1 is welded firstly, then the side sealing plate 2 and the lower cover plate 4 are assembled on the front surface of the upper cover plate 1 respectively, and then the welding seam between the upper cover plate 1 and the rib plate group 9 is welded, because the rib plate group 9 is clamped in a space formed by the upper cover plate 1, the welded conical box body plate 6, the ring 5, the side sealing plate 2 and the lower cover plate 4, the space has a certain limiting effect on the rib plate group 9, the welding seam of the rib plate group 9 is the largest, and the deformation caused by welding of the rib plate group 9 can be reduced under the limiting effect; and because bottom shrouding 3 is not assembled, can follow the mounted position of bottom shrouding 3 and weld, for the welding brings the facility. In addition, the conical box body structure is annealed, so that stress caused by welding can be eliminated.
Since the welding is mainly performed on the front surface of the upper cover plate 1, the welded upper cover plate 1 is deformed toward the side of the welding. To reduce the influence of welding on the flatness of the upper cover plate 1, the step 101 may further include: pre-deformation treatment is carried out on the upper cover plate 1.
Specifically, the upper cover plate 1 may be pressed centering on the X direction shown in fig. 5, and the pre-deformation amount may be 6 mm.
Exemplarily, step 101 may further include: rolling the side sealing plates 2 to enable the side sealing plates 2 to be enclosed into a cylinder; and removing the part with the excessive length in the side sealing plate 2, and reserving the assembly allowance of the target length at one end of the side sealing plate 2 after the excessive length is removed.
Specifically, the side sealing plate 2 can be rolled on a roller machine, pre-bending is carried out, most of pre-bending sections are removed by using a carbon arc air gouging machine after the rolling is finished, 10mm of assembly allowance needs to be reserved for the single-side pre-bending sections after cutting, and at the moment, the longitudinal seam of the cylinder is not subjected to spot welding.
Wherein, referring to fig. 2, the upper cover plate 1 is an eccentric ring 5. Referring to fig. 6, the rib plate group 9 includes eight pairs of rib plates, a first pair of rib plates of the eight pairs of rib plates are opposite and are all located on the diameter of the cross section of the upper cover plate and passing through the center of the stepped hole, each pair of rib plates of the other seven pairs of rib plates except the first pair of rib plates are symmetrically distributed relative to the diameter of the cross section of the upper cover plate 1 and passing through the center of the stepped hole 1a (coinciding with the X direction), the length direction of each rib plate of the eight pairs of rib plates coincides with the diameter of the cross section of the ring 5, and the included angle between the length directions of two adjacent rib plates is 22.5 °. Referring to fig. 6, assume that the other seven pairs of webs are 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6A, 6B, 7A, 7B and the first pair of webs is 8A, 8B.
The bottom closing plate 3 and the tapered box plate 6 may be pressed into a tapered cylinder by using an oil press. A ring 5-shaped rigid fixed support is added in the conical box body plate 6 to ensure the roundness of the cone. Step 101 may further include: the bottom closure plate 3 is divided into first to fourth sections 31-34 which are connected in series. Referring to fig. 7, the joints of the first section 31 to the fourth section 34 correspond to rib plates at corresponding positions, the first section 31 corresponds to a position covered by seven rib plates continuously distributed, the second section 32 corresponds to a position covered by three rib plates continuously distributed, the third section 33 corresponds to a position covered by seven rib plates continuously distributed, the fourth section 34 corresponds to a position covered by three rib plates continuously distributed, and the three rib plates (2A/1A/3A) corresponding to the second section 32 and the three rib plates (2B/1B/3B) corresponding to the fourth section 34 are three rib plates of another seven rib plate pairs.
Step 102 may include the following steps 102a-102 c.
And 102a, scribing position lines of the side sealing plate 2, the conical box body plate 6 and the rib plate group 9.
The upper cover plate 1 is placed on an assembly platform, the flatness of the upper cover plate 1 is checked to be less than or equal to 3mm before assembly, and position lines of the side sealing plates 2, the conical box body plates 6 and the rib plate groups 9 are marked on the upper cover plate 1 by taking the upper cover plate 1 as a reference.
Step 102b, assembling the conical box plate 6 and the ring 5.
The conical box plates 6 are assembled according to the position of the assembly line and then the ring 5 is assembled. The ring 5 is provided with a fluid medium passage, and the direction of the fluid medium passage can determine the fitting direction of the ring 5 and the tapered box plate 6. In addition, when assembling the ring 5, attention is paid to the coaxiality among the inspection piece upper cover plate 1, the tapered box plate 6, and the ring 5. For example, coaxiality control in the range of 2mm may be required. Meanwhile, the height from the upper end face of the ring 5 to the assembly platform is checked, and the height error can be controlled within a range of 2mm (at least more than four measuring points are uniformly distributed).
And 102c, assembling the rib plate group 9.
Assembling rib plate groups 9 according to an assembly line marked on the upper cover plate 1; the rib plate group 9 is only installed without welding in the step, mainly plays a role in strengthening, and prevents overlarge welding deformation in the step.
Step 103 may include steps 103a-103b as follows.
Step 103a, welding the upper cover plate 1 and the tapered box plate 6, and the ring 5 and the tapered box plate 6.
Referring to fig. 8, firstly welding a girth weld J1 between the upper cover plate 1 and the conical box plate 6, and then welding a girth weld J2 between the ring 5 and the conical box plate 6, wherein the welding is required to be symmetrical in sections; welding the welding seam of the inner ring, then performing back chipping on the outer side, and finally welding the welding seam on the outer side.
And step 103b, flaw detection.
And carrying out 100% UT flaw detection on a ring weld J1 between the upper cover plate 1 and the conical box body plate 6 and a ring weld J2 between the ring 5 and the conical box body plate 6, and meeting the qualification requirement of JB/T4730-2005 grade II. And for the welding seams which do not meet the flaw detection inspection, the welding seams are removed and then welded again. Illustratively, the length of the weld removed is in the range of 10-20 mm.
Step 104 may include: enclosing the side sealing plate 2 with the redundant length removed outside the rib plate group 9; spot welding the side sealing plate 2 and the rib plate group 9 after removing the redundant length; folding the side sealing plate 2 with the redundant length removed, and removing redundant assembly allowance; the lower plate 4 is assembled to the front surface of the upper cover plate 1.
Because the blanking and the assembly of the rib plate have deviation, the side sealing plate 2 is left with allowance to be matched in situ during the assembly. And enclosing the side sealing plates 2 outside the rib plates, then spot-welding each rib plate and the side sealing plates 2 in sequence, and removing redundant parts by using a carbon arc air gouging during folding. The lower plate 4 is then assembled.
In order to avoid disqualification of nondestructive flaw detection of the circumferential weld J1 between the upper cover plate 1 and the conical box body plate 6 and influence on welding operation during rework, the rib plate group 9 cannot be welded in step 103, and welding is carried out in step 105 after flaw detection is qualified. Step 105 may include steps 105a-105 d.
And 105a, welding the welding seams between the upper cover plate 1, the conical box body plate 6 and the ring 5 and the rib plate group 9 respectively.
Step 105a may include: and welding seams between the upper cover plate 1, the conical box body plate 6 and the ring 5 and the rib plate group 9 are welded in sequence according to the distribution sequence of each pair of rib plates.
Referring to fig. 8, the weld J3 between the gusset group 9 and the upper cover plate 1 is welded, then the weld J5 between the gusset group 9 and the tapered box plate 6 is welded, and then the weld J4 between the gusset group 9 and the ring 5 is welded. When the welding method is realized, each pair of rib plates is required to be welded simultaneously by taking the X direction as a symmetrical line, namely, a pair of rib plates 1A and 1B are welded simultaneously in the first step, and a pair of rib plates 2A and 2B are welded simultaneously in the second step and are welded downwards sequentially.
And 105b, welding the welding seams between the upper cover plate 1 and the rib plate group 9 and the side sealing plates 2 respectively.
Referring to fig. 9, the welding seam J6 between the upper cover plate 1 and the side sealing plate 2 is welded, and then the welding seam J7 between the gusset group 9 and the side sealing plate 2 is welded, so that the welding seam is required to be welded symmetrically in a segmented mode.
And 105c, welding the welding seams between the rib plate group 9 and the lower bottom plate 4 and the welding seams between the welding rings 5.
Referring to fig. 9, the weld J8 between the lower base plate 4 and the ring 5 is welded, and then the weld J9 between the rib plate group 9 and the lower base plate 4 is welded, requiring a step-by-step symmetric weld.
And step 105d, flaw detection.
And carrying out 100% PT flaw detection on welding to meet the JB/T4730-2005 II-level qualification.
Step 106 may include the following steps 106a-106 d.
And 106a, marking a position line of the small rib plate 7.
The position line of the small rib plate 7 is marked on the upper cover plate 1 as a reference.
And 106b, assembling the bottom closing plate 3 and the small rib plate 7.
The bottom closure plate 3 is assembled first, and 4 sections of the bottom closure plate 3 are assembled in sections according to fig. 7. And then assembling the small rib plates 7 according to the marked positions.
And 106c, welding the welding seams between the small rib plates 7 and the upper cover plate 1 and the conical box body plate 6, welding seams between the bottom sealing plate 3 and the side sealing plates 2, welding seams between the bottom sealing plate 3 and the lower base plate 4, and welding seams between the bottom sealing plate 3 and the rib plates 2A and 3A respectively.
Welding seams among the small rib plates 7, the upper cover plate 1 and the conical box body plate 6 are welded, and the symmetrical rib plates in the corresponding diameter direction are required to be welded simultaneously during welding; welding a circumferential weld between the bottom seal plate 3 and the side seal plates 2, wherein the welding is required to be symmetrical in sections; then welding a circumferential weld between the bottom sealing plate 3 and the lower bottom plate 4, and also requiring sectional symmetrical welding; and finally, welding seams between the bottom sealing plate 3 and the rib plates 2A and 3A are welded, and the symmetrical rib plates (namely 3B and 2B) corresponding to the diameter direction are required to be welded simultaneously during welding.
And step 106d, flaw detection.
And carrying out 100% PT flaw detection on welding to meet the JB/T4730-2005 II-level qualification.
Step 107 may include the following steps 107a-107 d.
Step 107a, preparing a plurality of vent holes on an outer plate of the main body structure of the conical box body, wherein the outer plate is a shell formed by a side sealing plate 2, a bottom sealing plate 3 and a lower bottom plate 4.
And step 107b, annealing the main body structure of the conical box body.
And step 107c, plugging a plurality of vent holes after finishing annealing.
Because the main body structure of the conical box body is a closed cavity, 3-4 vent holes with the diameter of 10mm are drilled on the outer plate before annealing, and the welding seam is blocked after annealing. During annealing, the small end of the main body structure of the conical box body is placed downwards, and the bottom of the main body structure is leveled to prevent the component from being distorted and deformed.
Step 107d, respectively performing an airtight test on the cavity y (see fig. 3) between the upper cover plate 1 and the tapered box plate 6, and the cavity x (see fig. 3) between the tapered box plate 6 and the outer plate.
And when the target test result is not achieved, removing the unqualified welding line, and welding the removed welding line again.
Exemplarily, referring to fig. 3, after annealing is completed, an airtight test is performed on the x/y cavity, and an oil pressure test is required on the y cavity of the box body, wherein the pressure is 0.3MPa, and leakage is not allowed in 30 minutes; and (3) performing an air pressure test on an x-cavity of the box body, wherein the pressure is 0.5 atmosphere and is not reduced in 30 minutes. When the airtight test is performed, soap solution is coated on the outer wall of the box body. If there is leakage in the cavity, soap bubbles will be generated at the leakage. The location of the soap bubble is the failed weld.
Step 101 may further include: a plurality of lifting lugs 17, a lubricating oil tank base 19, a safety balance valve block base 21 and a lubricating transition valve block base 24 are provided.
Accordingly, referring to fig. 10, the method may further include step 108.
And 108, respectively welding a plurality of lifting lugs 17, a lubricating oil tank base 19, a safety balance valve block base 21 and a lubricating transition valve block base 24 to the back of the upper cover plate 1.
Step 108 may include the following steps 108a-108 d.
And 108a, marking assembly position lines of the lifting lug 17, the lubricating oil tank base 19, the safety balance valve block base 21 and the lubricating transition valve block base 24.
And assembly position lines of a lifting lug 17, a lubricating oil tank base 19, a safety balance valve block base 21 and a lubricating transition valve block base 24 are marked on the upper cover plate 1 as a reference.
And step 108b, assembling the lifting lug 17, the lubricating oil tank base 19, the safety balance valve block base 21 and the lubricating transition valve block base 24.
Assembling the lifting lug 17, the lubricating oil tank base 19, the safety balance valve block base 21 and the lubricating transition valve block base 24 according to an assembling position line.
And 108c, welding the upper cover plate 1 with the lifting lug 17, the lubricating oil tank base 19, the safety balance valve block base 21 and the lubricating transition valve block base 24 respectively.
And welding seams between the back surface of the upper cover plate 1 and the lifting lugs 17, the lubricating oil tank base 19, the safety balance valve block base 21 and the lubricating transition valve block base 24 are welded respectively.
And step 108d, flaw detection.
And carrying out 100% PT flaw detection on welding to meet the JB/T4730-2005 II-level qualification.
The manufacturing method of the tapered box structural member is used for manufacturing the tapered box structural member of the full-slewing rudder propeller device (the number of the work in the factory: the propeller 110A) which is independently researched and designed by our factory, the size of the tapered box structural member manufactured according to the process scheme meets the design requirement, and the tapered box structural member is approved by the classification society and delivered to the shipyard.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method of making a tapered bin structure, the method comprising:
providing an upper cover plate, a conical box body plate, a ring, a rib plate group, side sealing plates, a lower base plate, a bottom sealing plate and small rib plates, wherein the upper cover plate is provided with a stepped hole, the conical box body plate and the bottom sealing plate are both conical cylinders, the side sealing plates are strip-shaped plates, and the lower base plate is a circular ring;
respectively assembling the conical box body plate, the ring and the rib plate group to the front surface of the upper cover plate, wherein the conical box body plate covers the stepped hole, the ring is installed at the small end of the conical box body plate, the rib plate group comprises a plurality of rib plates, the first end of each rib plate is positioned on the upper cover plate, the second end of each rib plate is positioned on the conical box body plate and abuts against the ring, and the stepped hole, the conical box body and the ring are coaxial;
welding the welds between the conical box plate, the ring, and the upper cover plate;
the side sealing plates and the lower base plate are respectively assembled on the front surface of the upper cover plate, the rib plates are positioned in the side sealing plates, the first ends of the rib plates are respectively abutted against the side sealing plates, and the lower base plate is sleeved on the ring and covers the rib plate group;
welding the upper cover plate, the conical box body plate and welding seams between the ring and the rib plate group, between the upper cover plate and the rib plate group and the side sealing plates, and between the ring and the rib plate group and the lower bottom plate;
respectively welding the bottom sealing plate and the small rib plate to the front surface of the upper cover plate to obtain a main body structure of the conical box body, wherein the bottom sealing plate covers the rib plate group, the large end of the bottom sealing plate is connected with the side sealing plate, the small end of the bottom sealing plate is connected with the peripheral wall of the lower bottom plate, and the small rib plate is positioned in the conical box body plate and positioned on the front surface of the upper cover plate;
and annealing the main structure of the conical box body to form a conical box body structural part.
2. The method of claim 1, wherein prior to said assembling the tapered box plate, the ring, and the web set to the front face of the upper deck plate, respectively, the method further comprises:
and carrying out pre-reversible deformation treatment on the upper cover plate.
3. The method of claim 1, wherein prior to said assembling said side seal plates and said lower base plate to said respective front faces of said upper cover plates, said method further comprises:
rolling the side sealing plates to enable the side sealing plates to be enclosed into a cylinder;
and removing the part with the excessive length in the side sealing plate, and reserving the assembly allowance of the target length at one end of the side sealing plate after the excessive length is removed.
4. The method of claim 3, wherein said mounting said side seal plates and said lower base plate to respective front faces of said upper cover plates comprises:
enclosing the side sealing plate with the redundant length removed outside the rib plate group;
spot welding the side sealing plate and the rib plate group after the redundant length is removed;
folding the side sealing plate with the redundant length removed, and removing redundant assembly allowance;
the lower base plate is fitted to the front surface of the upper cover plate.
5. The method according to claim 1, wherein the upper cover plate is an eccentric circular ring, the rib plate group comprises eight pairs of rib plates, a first pair of rib plates in the eight pairs of rib plates are opposite and are positioned on the diameter of the cross section of the upper cover plate and passing through the center of the stepped hole, each pair of rib plates in the other seven pairs of rib plates except the first pair of rib plates are symmetrically distributed relative to the diameter of the cross section of the upper cover plate and passing through the center of the stepped hole, the length direction of each rib plate in the eight pairs of rib plates is coincident with the diameter of the cross section of the ring, and the included angle between the length directions of two adjacent rib plates is 22.5 degrees.
6. The method of claim 5, wherein said welding the upper cover plate, the conical box plate, and the weld between the ring and the web set, respectively, comprises:
and welding the upper cover plate, the conical box body plate and the welding seams between the ring and the rib plate groups respectively in sequence according to the distribution sequence of each pair of rib plates.
7. The method according to claim 5, wherein prior to said welding of said bottom closure plate and said webs, respectively, to said front face of said upper cover plate, said method further comprises:
the bottom sealing plate is divided into a first section, a second section, a third section and a fourth section which are sequentially connected, the joints of the first section, the second section and the fourth section respectively correspond to the rib plates at corresponding positions, the first section corresponds to the position covered by seven continuously distributed rib plates, the second section corresponds to the position covered by three continuously distributed rib plates, the third section corresponds to the position covered by seven continuously distributed rib plates, the fourth section corresponds to the position covered by three continuously distributed rib plates, and the three rib plates corresponding to the second section and the three rib plates corresponding to the fourth section are three rib plate pairs of the other seven rib plate pairs;
and respectively welding the first section, the fourth section and the small rib plate to the front surface of the upper cover plate.
8. The method of claim 1, wherein annealing the conical box body structure comprises:
preparing a plurality of vent holes on an outer plate of the main body structure of the conical box body, wherein the outer plate is a shell formed by the side sealing plates, the bottom sealing plate and the lower bottom plate;
annealing the main structure of the conical box body;
and plugging the plurality of vent holes after finishing annealing.
9. The method of claim 8, wherein after said annealing said conical box body structure, said method further comprises:
respectively carrying out an air tightness test on a cavity between the upper cover plate and the conical box body plate and a cavity between the conical box body plate and the outer plate;
and when the target test result is not achieved, removing the unqualified welding line, and welding the removed welding line again.
10. The method of claim 1, wherein after annealing the conical box body structure, the method further comprises:
providing a plurality of lifting lugs;
and welding the plurality of lifting lugs to the back surface of the upper cover plate.
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| CN110842473B (en) * | 2019-11-13 | 2020-09-15 | 西安交通大学 | Radial continuous path friction stir additive manufacturing process for large thick-wall disc-shaped ring piece |
| CN111331323B (en) * | 2020-03-20 | 2022-01-28 | 石钢京诚装备技术有限公司 | Welding process for trunnion block of converter backing ring |
| CN111644822B (en) * | 2020-07-02 | 2021-11-30 | 德阳市瑞祥机械厂 | Method for processing box body of primary mirror chamber of 4m telescope |
| CN114715351A (en) * | 2022-03-30 | 2022-07-08 | 芜湖造船厂有限公司 | Method for mounting ship full-rotation rudder propeller equipment |
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| CN102887220B (en) * | 2012-09-11 | 2014-12-03 | 武昌船舶重工集团有限公司 | Electric thruster pedestal and welding method thereof |
| KR101380659B1 (en) * | 2012-11-30 | 2014-04-04 | 삼성중공업 주식회사 | Method for welding inner plate and cover plate and rudder manufacturing method having the same |
| CN103407563B (en) * | 2013-08-14 | 2015-08-12 | 南京高精船用设备有限公司 | Marine adjustable-pitch all-direction propeller |
| CN103818540A (en) * | 2014-02-28 | 2014-05-28 | 广新海事重工股份有限公司 | Processing method of eccentric full-revolving steering oar device base |
| CN105935843B (en) * | 2016-05-19 | 2019-02-05 | 武汉船用机械有限责任公司 | A kind of structural member welding method |
| CN208787841U (en) * | 2018-09-04 | 2019-04-26 | 阪神机器（徐州）有限公司 | Discontinuous welding takes over control gusset bending apparatus |
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