CN113251066B

CN113251066B - Flange base, manufacturing method thereof and hoisting machine

Info

Publication number: CN113251066B
Application number: CN202110792377.5A
Authority: CN
Inventors: 任军辉; 张维友; 张桂; 袁光金; 罗红亮
Original assignee: China Railway Wuxin Heavy Industry Co Ltd
Current assignee: China Railway Wuxin Heavy Industry Co Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-09-21
Anticipated expiration: 2041-07-14
Also published as: CN113251066A

Abstract

The invention discloses a flange seat and a manufacturing method thereof, and a hoisting machine, wherein the flange seat comprises a bottom plate and two lug plate assemblies, the two lug plate assemblies are arranged on the bottom plate and are arranged at intervals along the X direction, the bottom of each lug plate assembly is divided into N notch parts and N +1 socket parts along the length direction, N is more than or equal to 1, the bottom surface of each notch part is sunken upwards to form notches penetrating through two wall surfaces of the lug plate in the thickness direction, the bottom plate is provided with a through groove matched with the socket parts of the lug plate assemblies, and the socket parts are clamped in the corresponding through grooves and are in full-welding connection with the bottom plate. Therefore, the groove holes and the notches which are embedded into each other are processed on the bottom plate and the lug plates, and positioning is formed during point mounting, so that most of the stress of the flange seat is transmitted by the self-contact part of the bottom plate and the lug plates, the requirement on welding seams is relatively reduced, the welding deformation is reduced, and the labor intensity of work is reduced.

Description

Flange base, manufacturing method thereof and hoisting machine

Technical Field

The invention relates to the technical field of hoisting equipment, in particular to a flange seat, a manufacturing method and hoisting machinery with the flange seat.

Background

At present, the metal structure assembly parts of equipment such as a gantry crane, a portal crane, a quayside container crane, a bulk cargo handling machine and the like are connected with a cart running mechanism by adopting a flange seat as a transition piece, the bottom plate end of the flange seat is connected with the metal structure part, and an ear plate hinge shaft hole is connected with the cart running mechanism. The flange seat has the advantages of compact structure, asymmetric structure, large stress during working, high welding requirement, large thickness of main part plates, large welding deformation, low production efficiency and high labor intensity of workers.

As shown in figures 1-3, the ear plate 1 and the bottom plate 3 of the existing flange seat are welded and connected with the bottom plate by fillet welds by grooves arranged on two sides of the ear plate in the thickness direction, most of the stress is transmitted through the welds, and the welds are required to meet the UT or RT grade requirements. The thickness of the lug plate is at least larger than 30mm according to the specification of equipment products, the size of a molten pool is larger after a groove is formed, multiple layers and multiple channels are needed to weld, and because the requirement of flaw detection of the weld is high, the sealing plate 4 and the rib plate 5 between the lug plate 1 and the bottom plate 3 cannot be welded firstly during welding. Meanwhile, because the lug plates 1 are arranged on one side surface of the bottom plate 3, a large amount of heat energy is gathered during welding on the side surface, and the side surface is fixed, the welded bottom plate has large welding deformation, the distance between the two lug plates cannot be effectively controlled, and the subsequent shape correction is difficult, and the machining amount of the flange surface of the bottom plate is large. Therefore, at present, two flange seats are mostly welded together, the two flange seats are welded together in a manner that a bottom plate is close to a bottom plate, a plurality of support ribs are temporarily welded at the points of two lug plates respectively, after the welding is finished, the two flange seats are cut open, the tie bars are cut off, and the flange surfaces, hinge holes and other positions are machined.

The flange seat and the processing method of the existing structure at least have the following defects:

1. the ear plates and the bottom plate have large overall dimensions and heavy weight, and the positioning and spot mounting of the ear plates after the grooves are formed are inconvenient and need multi-person assistance;

2. the thickness of the lug plate is thick, the volume of a welding pool is large after the groove is formed, the welding heat energy is concentrated, the welding efficiency is low (more than 3 days are needed for manufacturing a flange seat at present), and the labor intensity of workers is high;

3. the welding stress is large, the deformation is large, and the welding stress is difficult to eliminate and uncontrollable;

4. the deformation control mode that two flange seat bottom plates are welded by a bottom plate and supporting ribs are welded on the lug plates is adopted, so that the subsequent separation and disassembly workload and the polishing workload are increased, and the overall production efficiency and the appearance quality of the flange seats are influenced;

5. because of large welding deformation, more machining allowance needs to be reserved when the ear plate and the bottom plate are prepared and discharged, so that the subsequent machining amount is large, the production efficiency is influenced, and materials are wasted;

6. low production efficiency, high manufacturing cost and unstable quality.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a flange seat which is convenient to spot-mount and weld, also provides a manufacturing method of the flange seat, which has the advantages of small deformation after welding, small welding stress, small machining amount, high production efficiency, stable quality, low labor intensity of workers and economic manufacturing cost, and also correspondingly provides a hoisting machine with the flange seat.

In order to solve the technical problems, the invention adopts the following technical scheme:

a flange seat comprises a bottom plate and two lug plate components, wherein one of the length direction and the width direction of the bottom plate is an X direction, the other direction is a Y direction, the two lug plate components are arranged on the bottom plate and are arranged at intervals along the X direction,

the bottom of the ear plate component is divided into N notch parts and N +1 socket parts along the length direction, N is more than or equal to 1, the bottom surface of the notch part is upwards sunken to form notches penetrating through two wall surfaces of the ear plate in the thickness direction,

the bottom plate is provided with a through groove matched with the socket part of the lug plate assembly, and the socket part is clamped in the corresponding through groove and is fully welded with the bottom plate.

As a further improvement of the above technical solution:

still include two shroudings, two shroudings are located on the bottom plate and are set up along Y direction interval, the otic placode subassembly is connected between two shroudings, the shrouding links to each other with the bottom plate full weld, and links to each other with the otic placode subassembly full weld.

The novel lug plate assembly is characterized by further comprising a plurality of rib plates, wherein the rib plates are circumferentially arranged at intervals and are respectively arranged at the edge of the top surface of the bottom plate, the rib plates are connected between the outer wall surface of the corresponding sealing plate or lug plate assembly and the top surface of the bottom plate, and the rib plates are connected with the bottom plate in a full-welding mode and are connected with the corresponding sealing plate or lug plate assembly in a full-welding mode.

As a general inventive concept, the present invention also provides a method of manufacturing the flange seat described above, including:

s1: fixing the bottom plate by adopting a fixture, horizontally and rotatably connecting the fixture with a working platform capable of vertically turning, clamping the socket part of the lug plate assembly into the corresponding through groove of the bottom plate, and positioning a welding line between the lug plate assembly and the front surface of the bottom plate by adopting spot welding;

s2: a limiting structure is arranged between the upper parts of the two lug plate assemblies to ensure that the distance between the two lug plate assemblies is not changed in the welding process; the two ear plate assemblies are detachably connected through the mounting shaft penetrating through the hinge shaft holes of the two ear plate assemblies, so that the distance between the two ear plate assemblies is not changed in the welding process, and the coaxiality of the hinge shaft holes of the two ear plate assemblies is ensured;

s3: vertically turning the working platform for 180 degrees, and positioning a welding line between the lug plate assembly and the back of the bottom plate by spot welding; then reversely overturning the working platform for 180 degrees;

s4: the vertical upset of cooperation work platform to and the horizontal rotation that anchor clamps drove the flange seat, accomplish the full weld of two otic placode subassemblies and bottom plate.

As a further improvement of the above technical solution:

the flange seat further comprises two sealing plates and a plurality of rib plates, the two sealing plates are respectively arranged at two ends of the ear plate assembly along the Y direction, the ear plate assembly is connected between the two sealing plates, the plurality of rib plates are circumferentially arranged at the edge of the top surface of the bottom plate at intervals, and the rib plates are connected between the outer wall surfaces of the corresponding sealing plates or the ear plate assembly and the top surface of the bottom plate;

the steps S1 and S2 include:

and the welding seam between the spot welding positioning sealing plate and the bottom plate, the welding seam between the spot welding positioning rib plate and the bottom plate and the welding seam between the spot welding positioning rib plate and the corresponding sealing plate or lug plate component are adopted.

Setting the welding seams between the two sides of the lug plate assembly in the thickness direction and the top surface of the base plate as a first welding seam and a second welding seam respectively, setting the welding seams between the two sides of the lug plate assembly in the thickness direction and the bottom surface of the base plate as a third welding seam and a fourth welding seam respectively, and setting the welding seam between the end part of the socket part along the Y direction and the base plate as a fifth welding seam, wherein the first welding seam corresponds to the third welding seam, the second welding seam corresponds to the fourth welding seam, the first welding seam and the second welding seam are fillet welding seams, and the third welding seam, the fourth welding seam and the fifth welding seam are V-shaped groove welding seams; the process of step S4 is as follows:

s4.1: horizontally rotating the fixture, and welding a first welding seam between the two lug plate assemblies and the bottom plate;

s4.2: vertically turning the working platform by 180 degrees, and in cooperation with the horizontal rotation of the fixture, welding a fourth welding seam between the two lug plate assemblies and the bottom plate, then welding a third welding seam between the two lug plate assemblies and the bottom plate, and then welding a fifth welding seam between the two lug plate assemblies and the bottom plate;

s4.3: and the working platform is reversely turned by 180 degrees, and the second welding line between the two lug plate assemblies and the bottom plate is welded by matching with the horizontal rotation of the fixture.

Further comprising:

s5: the vertical upset of cooperation work platform to and the horizontal rotation that anchor clamps drove the flange seat, accomplish the full-length welding of shrouding and bottom plate, the full-length welding of shrouding and otic placode subassembly, the full-length welding of gusset and bottom plate, and the full-length welding of gusset and corresponding shrouding or otic placode subassembly.

The process of step S5 is as follows:

s5.1: horizontally rotating the clamp to complete welding of the welding seams between the two sealing plates and the bottom plate;

s5.2: vertically turning the working platform by 90 degrees, and completing welding of a welding seam between the sealing plate and the lug plate assembly by matching with horizontal rotation of the clamp;

s5.3: vertically turning the working platform by 90 degrees, and completing welding of a welding seam between the rib plate and the bottom plate by matching with horizontal rotation of the fixture;

s5.4: and vertically turning the working platform by 90 degrees again, and completing welding of the welding seam between the rib plate and the lug plate assembly or the seal plate by matching with horizontal rotation of the fixture.

In step S1, after the bottom plate is fixed by the fixture, the method further includes: a backing plate with the thickness of 5-10mm is additionally arranged between the bottom plate and the working platform, and the backing plate is arranged between the two lug plate assemblies.

As a general inventive concept, the present invention also provides a hoisting machine comprising a crane body and the above-mentioned flange seat provided on the crane body.

Compared with the prior art, the invention has the advantages that:

1. the flange seat provided by the invention adopts the technical scheme that the groove holes and the notches which are embedded with each other are processed on the bottom plate and the lug plate, and positioning is formed during point mounting, so that most of the stress of the flange seat is transferred from the self-contact part of the bottom plate and the lug plate, the requirement on welding seams is relatively reduced, and the working labor intensity is reduced.

2. Compared with the existing large-volume welding pool structure and process for welding the two sides of the lug plate with the grooves and the single side of the bottom plate, the manufacturing method of the flange seat provided by the invention has the advantages of small welding deformation, welding stress, easiness in operation, small subsequent machining amount, improvement on production efficiency (the flange seat can be finished in 1.5 days), and the like.

3. The manufacturing method of the flange seat provided by the invention adopts a mutual embedding structure of the bottom plate and the lug plate, and adopts technical equipment such as a special rotating device, a clamp, a limiting structure, a shaft mounting and the like and processes such as reverse deformation and the like during manufacturing, so that the welding deformation is small, the welding stress is small, all welding seams are welded at a flat welding position, the welding quality is reliable, the subsequent machining amount is small, the allowance left during material preparation and blanking is small, the production efficiency is improved, and the cost is saved.

Drawings

FIG. 1 is a schematic front view of a prior art arrangement;

FIG. 2 is a left fully cross-sectional schematic view of a prior art structure;

FIG. 3 is a schematic top view of a prior art structure;

FIG. 4 is a schematic top view of the present invention;

FIG. 5 is a schematic sectional view A-A of FIG. 4;

FIG. 6 is a schematic left side elevational view in full section of the present invention;

FIG. 7 is a left side schematic view in full section of another embodiment of the present invention;

FIG. 8 is a schematic partial cross-sectional view of B-B of FIG. 5;

FIG. 9 is an enlarged partial view of FIG. 6 at C;

FIG. 10 is an enlarged partial view of FIG. 7 at D;

FIG. 11 is a schematic plan view of the ear plate construction of the present invention;

FIG. 12 is a schematic plan view of the base plate construction of the present invention;

FIG. 13 is a schematic front view of the present invention as it is being secured to welding tooling during welding;

FIG. 14 is a schematic top view of the present invention mounted on welding tooling during welding;

FIG. 15 is a schematic left side view of the present invention mounted on welding tooling during welding;

fig. 16 is a schematic view of fig. 13 from the direction E.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.

In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

Example 1:

as shown in fig. 4-7, the flange base of this embodiment includes a bottom plate 3, two ear plate assemblies, two sealing plates 4 and a plurality of ribs 5.

It is X direction to establish 3 length direction of bottom plate and one of width direction of bottom plate as, the other direction is Y direction, two otic placode subassemblies are located on bottom plate 3 and are set up along X direction interval, as shown in fig. 11, otic placode subassembly bottom is divided into N notch portion and N +1 socket joint portion 14 along its length direction, N is greater than or equal to 1, the bottom surface undercut of notch portion forms the notch 11 that runs through two walls of otic placode thickness direction, as shown in fig. 12, set up on bottom plate 3 with the socket joint portion 14 complex logical groove 31 of otic placode subassembly, socket joint portion 14 card is located in the logical groove 31 that corresponds and is continuous with bottom plate 3 full weld.

Two shrouding 4 locate on the bottom plate 3 and set up along the Y direction interval, and the otic placode subassembly is connected between two shrouding 4, and shrouding 4 and 3 full weld of bottom plate link to each other, and link to each other with the otic placode subassembly full weld.

The plurality of rib plates 5 are circumferentially spaced and are respectively arranged at the edge of the top surface of the bottom plate 3, the rib plates 5 are connected between the outer wall surface of the corresponding sealing plate 4 or the ear plate assembly and the top surface of the bottom plate 3, and the rib plates 5 are fully welded with the bottom plate 3 and are fully welded with the corresponding sealing plate 4 or the ear plate assembly.

In this embodiment, the otic placode subassembly includes otic placode 1 and two flitch 2, and two flitch 2 branches are located on two walls of otic placode 1 thickness direction, and the bottom of otic placode 1 is all located to notch portion and socket part 14.

As shown in fig. 8 to 10, the welds between the two sides of the lug plate assembly in the thickness direction and the top surface of the base plate 3 are respectively a first weld 132 and a second weld 131, and in this embodiment, the first weld 132 and the second weld 131 are fillet welds. It is assumed that the welds between the two sides of the lug plate assembly in the thickness direction and the bottom surface of the base plate 3 are a third weld 133 and a fourth weld 134, respectively, and in this embodiment, the third weld 133 and the fourth weld 134 are V-groove welds. The first weld 132 and the third weld 133 correspond to each other up and down, and the second weld 131 and the fourth weld 134 correspond to each other up and down. Let a weld between the end of the socket 14 in the Y direction and the bottom plate 3 be a fifth weld 135, and in this embodiment, the fifth weld 135 is a V-groove weld.

The flange seat of fig. 6 differs from the flange seat of fig. 7 mainly in the form of the grooves of the third weld 133 and the fourth weld 134.

Example 2:

in this embodiment, the auxiliary tool is used to assist the welding machine to complete the welding of the flange seat in embodiment 1. The auxiliary tool comprises a rotating tool for enabling each welding seam of the flange seat to be located at a flat welding position, a clamp 7 for fixing the flange seat, a limiting structure 8 for preventing the lug plate 1 from deforming, and a mounting and aligning shaft 9 for preventing the lug plate 1 from deforming and controlling the coaxiality of 12 hinge shaft holes in the two lug plates 1. Wherein, rotatory frock includes drive arrangement 6, and the work platform 61 that links to each other with drive arrangement 6 transmission, the horizontal rotation connects anchor clamps 7 on work platform 61, and drive arrangement 6 can drive the vertical upset of work platform 61, and anchor clamps 7 are used for fixed not welded flange seat, and it can drive the relative work platform 61 horizontal rotation of flange seat.

As shown in fig. 13 to 16, a method of manufacturing a flange seat according to embodiment 1 includes:

(1) fixing the bottom plate 3 by adopting a clamp 7, adding a backing plate of 5-10mm at the contact surface position of the bottom plate 3 between the two lug plates 1 and the working platform 61 for reverse deformation, and then clamping the socket part 14 of the lug plate assembly into the corresponding through groove 31 of the bottom plate 3;

(2) detecting the verticality of the lug plate 1 and the bottom plate 3 by using an angle square, and after the requirements are met, symmetrically spot-welding the lug plate 1 and the bottom plate firmly according to two sides of the lug plate in the thickness direction;

(3) the left side and the right side of the two ear plates 1 are respectively provided with an adjustable distance limiting structure 8 so as to limit the distance between the two ear plates 1; specifically, the limiting structure 8 comprises a limiting pull rod and four limiting nuts penetrating through the limiting pull rod, and each two nuts clamp one ear plate 1, so that the distance between the two ear plates 1 is limited;

(4) sealing plates 4 are point-mounted on the two sides of the ear plate 1 close to the bottom plate 3 as required;

(5) spot welding rib plates 5 between the ear plates 1 and the bottom plate 3 and between the sealing plate 4 and the bottom plate 3 according to requirements;

(6) an adjustable mounting shaft 9 for ensuring the distance between the two lug plates and the coaxiality of the hinge shaft holes 12 is mounted in the hinge shaft holes 12 of the two lug plates 1;

(7) turning the working platform 61 in a vertical plane (around a horizontal shaft) by 180 degrees;

(8) spot welding is carried out on the contact part of the lug plate 1 and the bottom plate 3 at the embedding position of the lug plate 1 and the bottom plate 3;

(9) reversely overturning the working platform 61 by 180 degrees;

(10) the horizontal rotating clamp 7 is used for welding a first welding seam 132 at the joint of the two lug plates 1 and the bottom plate 3;

(11) the working platform 61 is vertically turned over by 180 degrees, and then the fixture 7 is horizontally rotated to weld a fourth welding line 134 and a fifth welding line 135 at the joint of the two lug plates 1 and the bottom plate 3 and simultaneously weld a third welding line 133 and a fifth welding line 135 at the joint of the lug plate 1 of one flange seat and the bottom plate 3;

(12) a third welding seam 133 at the joint of the lug plate 1 and the bottom plate 3 of the rest flange seat;

(13) the working platform 61 is vertically turned over by 180 degrees, and then a second welding line 131 at the joint of the two lug plates 1 and the bottom plate 3 is welded by matching with the horizontal rotation of the clamp 7;

(14) the clamp 7 on the horizontal rotating working platform 61 is used for welding the welding seams between the two seal plates 4 and the bottom plate 3;

(15) the working platform 61 is vertically turned over by 90 degrees, and welding seams between the two sealing plates 4 and the two lug plates 1 are welded;

(16) horizontally rotating the clamp 7 on the working platform 61, and welding a welding seam between the rib plate 5 and the bottom plate 3;

(17) the working platform 61 is vertically turned over by 90 degrees, and welding seams between the rib plates 5 and the two lug plates 1 are welded;

(18) after the to-be-welded seam is cooled, disassembling the flange seat and carrying out correction and stress relief treatment;

(19) disassembling the lower supporting device 8 and assembling the shaft 9;

(20) correcting and checking;

(21) the flange surface and the hinge shaft hole 12 of the machining bottom plate 3, the planes of the flitch plates 2 on the two sides of the lug plate 1 and the threaded holes are machined, and the machining amount of the flange surface of the bottom plate 3 is 0-3 mm.

The ear plate 1 is required to be assembled with the flitch 2 before being spot-mounted and welded with the bottom plate, and the method comprises the following specific steps:

(1) aligning the flitch 2 with the hinge shaft hole 12 of the ear plate 1 according to requirements and installing the flitch on two sides of the ear plate 1;

(2) and welding the welding seam between the flitch plate 2 and the lug plate 1.

Before the bottom plate 3 and the lug plate 1 are welded in a spot-welding mode, a bolt hole and a slotted hole 31 embedded into the lug plate are machined, and the size of the slotted hole is 0.5-3mm larger than that of the single side of the embedded part of the lug plate 1.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. A method for manufacturing a flange seat, which comprises the steps of,

the flange seat comprises a bottom plate (3) and two lug plate components, one of the length direction and the width direction of the bottom plate (3) is an X direction, the other direction is a Y direction, the two lug plate components are arranged on the bottom plate (3) and are arranged at intervals along the X direction,

the bottom of the ear plate component is divided into N groove openings and N +1 socket parts (14) along the length direction, N is more than or equal to 1, the bottom surface of each groove opening is upwards sunken to form a groove opening (11) penetrating through two wall surfaces of the ear plate in the thickness direction,

a through groove (31) matched with the socket part (14) of the lug plate assembly is formed in the bottom plate (3), and the socket part (14) is clamped in the corresponding through groove (31) and is in full-welding connection with the bottom plate (3);

the manufacturing method comprises the following steps:

s1: fixing the bottom plate (3) by adopting a clamp (7), horizontally and rotatably connecting the clamp (7) with a vertically-turnable working platform (61), clamping a socket part (14) of the lug plate assembly into a corresponding through groove (31) of the bottom plate (3), and positioning a welding line on the front surfaces of the lug plate assembly and the bottom plate (3) by spot welding;

s2: a limiting structure (8) is arranged between the upper parts of the two lug plate assemblies to ensure that the distance between the two lug plate assemblies is unchanged in the welding process; the mounting shaft (9) penetrating through the hinge shaft holes (12) of the two lug plate assemblies is detachably connected with the two lug plate assemblies so as to ensure that the distance between the two lug plate assemblies is unchanged in the welding process and the coaxiality of the hinge shaft holes (12) of the two lug plate assemblies is ensured;

s3: vertically turning the working platform (61) for 180 degrees, and positioning a welding line between the lug plate assembly and the back of the base plate (3) by spot welding; then reversely overturning the working platform (61) for 180 degrees;

s4: the vertical turning of the working platform (61) is matched, and the clamp (7) drives the flange seat to horizontally rotate, so that the full welding of the two lug plate assemblies and the bottom plate (3) is completed;

the flange seat further comprises two sealing plates (4) and a plurality of rib plates (5), the two sealing plates (4) are respectively arranged at two ends of the ear plate assembly along the Y direction, the ear plate assembly is connected between the two sealing plates (4), the plurality of rib plates (5) are circumferentially arranged at the edges of the top surface of the bottom plate (3) at intervals, and the rib plates (5) are connected between the outer wall surfaces of the corresponding sealing plates (4) or ear plate assemblies and the top surface of the bottom plate (3);

the steps S1 and S2 include:

spot welding is adopted to position the welding seam between the sealing plate (4) and the bottom plate (3), the welding seam between the spot welding positioning rib plate (5) and the bottom plate (3) is adopted, and the welding seam between the spot welding positioning rib plate (5) and the corresponding sealing plate (4) or lug plate component is adopted;

setting the welding seams between two sides of the lug plate assembly in the thickness direction and the top surface of the base plate (3) as a first welding seam (132) and a second welding seam (131), setting the welding seams between the two sides of the lug plate assembly in the thickness direction and the bottom surface of the base plate (3) as a third welding seam (133) and a fourth welding seam (134), setting the welding seam between the end part of the socket part (14) along the Y direction and the base plate (3) as a fifth welding seam (135), wherein the first welding seam (132) corresponds to the third welding seam (133), the second welding seam (131) corresponds to the fourth welding seam (134), the first welding seam (132) and the second welding seam (131) are fillet welding seams, and the third welding seam (133), the fourth welding seam (134) and the fifth welding seam (135) are V-shaped groove welding seams; the process of step S4 is as follows:

s4.1: a horizontal rotating clamp (7) for welding a first welding seam (132) between the two lug plate assemblies and the bottom plate (3);

s4.2: vertically turning the working platform (61) by 180 degrees, and in cooperation with the horizontal rotation of the fixture (7), firstly welding a fourth welding seam (134) between the two lug plate assemblies and the bottom plate (3), then welding a third welding seam (133) between the two lug plate assemblies and the bottom plate (3), and then welding a fifth welding seam (135) between the two lug plate assemblies and the bottom plate (3);

s4.3: and (3) reversely turning the working platform (61) for 180 degrees, and welding a second welding seam (131) between the two lug plate assemblies and the bottom plate (3) by matching with the horizontal rotation of the fixture (7).

2. The method of manufacturing a flange seat according to claim 1, further comprising:

s5: the vertical upset of cooperation work platform (61) to and anchor clamps (7) drive the horizontal rotation of flange seat, accomplish the full-length welding of shrouding (4) and bottom plate (3), the full-length welding of shrouding (4) and otic placode subassembly, the full-length welding of gusset (5) and bottom plate (3), and the full-length welding of gusset (5) and corresponding shrouding (4) or otic placode subassembly.

3. The method for manufacturing a flange seat according to claim 2, wherein the process of step S5 is as follows:

s5.1: horizontally rotating the clamp (7) to complete the welding of the welding seam between the two sealing plates (4) and the bottom plate (3);

s5.2: vertically overturning the working platform (61) by 90 degrees, and completing welding of a welding seam between the sealing plate (4) and the lug plate assembly by matching with horizontal rotation of the clamp (7);

s5.3: vertically turning the working platform (61) by 90 degrees again, and completing welding of a welding seam between the rib plate (5) and the bottom plate (3) by matching with horizontal rotation of the clamp (7);

s5.4: and vertically turning the working platform (61) by 90 degrees again, and completing the welding of the welding seam between the rib plate (5) and the ear plate assembly or the seal plate (4) by matching with the horizontal rotation of the clamp (7).

4. The method for manufacturing a flange seat according to claim 1, wherein the step S1, after fixing the bottom plate (3) with the fixture (7), further comprises: a backing plate with the thickness of 5-10mm is additionally arranged between the bottom plate (3) and the working platform (61), and the backing plate is arranged between the two lug plate assemblies.

5. Hoisting machine, characterized in that it comprises a crane body and a flange seat made according to the manufacturing method of any one of claims 1-4 provided on said crane body.