Combined frame for steel plate assembly and welding and steel plate assembly and welding method

Abstract

The present invention discloses a combined cradle for steel plate assembly and welding, comprising a sub-cradle and a mother cradle; the sub-cradle comprises a sub-rectangular frame and a sub-support frame; two sub-fixing cylinders are respectively provided at the front and rear ends of the sub-rectangular frame, and sub-fixing pin holes are provided on the sub-fixing cylinders; two sub-hanging ears are provided at the left end of the sub-rectangular frame; and two sub-positioning cones are provided at the right end of the sub-support frame; the mother cradle comprises a mother rectangular frame and a mother support frame; two mother fixing cylinders are respectively provided at the front and rear ends of the mother rectangular frame, and mother fixing pin holes are provided on the mother fixing cylinders; two mother hanging ears are provided at the left end of the mother rectangular frame; and two mother positioning holes are provided at the right end of the mother support frame. The present invention also discloses a method for assembling and welding steel plates. The present invention uses the arrangement of the sub-cradle and the mother cradle, combined with lifting equipment, to turn over the panel after front welding, thereby avoiding the existing operation of welding hanging ears on the panel, saving time and avoiding damage to the steel plate surface.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a combined jig for assembling and welding steel plates and a steel plate assembling and welding method. Background Art

[0002] During shipbuilding, when constructing straight sections, multiple steel plates need to be assembled and welded into flat panels. The specific welding method is as follows: After the multiple steel plates are assembled, they are first welded frontally using single-wire submerged arc automatic welding to form the panels. Multiple lifting lugs are then welded to the panels. The panels are then turned over using lifting equipment using the welded lifting lugs. After turning over, the backside welding is then performed. Finally, the lifting lugs are removed and polished.

[0003] However, welding the lifting lugs on the panels takes a long time and damages the surface of the steel plates, increasing the subsequent cutting and grinding work.

[0004] Based on this, the present application proposes a combined frame for steel plate assembly and welding and a steel plate assembly and welding method, which uses the combined frame in combination with lifting equipment to turn over the panels after front welding, thereby avoiding the existing operation of welding lifting ears on the panels, saving time and avoiding damage to the steel plate surface. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a combined jig for assembling and welding steel plates and a method for assembling and welding steel plates.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A combined cradle for assembling and welding steel plates, comprising a sub-cradle and a mother cradle;

[0008] The sub-tire frame comprises a sub-rectangular frame, and a sub-support frame in a grid structure is fixedly arranged inside the sub-rectangular frame;

[0009] Two sub-fixing tubes are respectively provided at the front and rear ends of the sub-rectangular frame, and sub-fixing pin holes extending in the left and right directions are provided on the sub-fixing tubes; two sub-hanging ears are provided at the left end of the sub-rectangular frame;

[0010] Four sub-hoisting brackets are provided on the sub-support frame, and sub-hoisting holes are provided on the sub-hoisting brackets; two sub-positioning cones are provided at the right end of the sub-support frame;

[0011] The mother tire frame comprises a mother rectangular frame, and a mother support frame in a grid structure is fixedly arranged on the inner side of the mother rectangular frame;

[0012] Two female fixing cylinders are respectively provided at the front and rear ends of the female rectangular frame, and the female fixing cylinders are provided with female fixing pin holes extending in the left and right directions; two female lifting ears are provided at the left end of the female rectangular frame;

[0013] Four female lifting brackets are provided on the female support frame, and female lifting holes are provided on the female lifting brackets; two female positioning holes are provided on the right end of the female support frame;

[0014] After the sub-positioning cone is aligned and plugged into the corresponding female positioning hole, shackles are installed in the front and rear corresponding sub-lifting ears and female lifting ears, and positioning pins are installed in the left and right corresponding sub-fixing pin holes and female fixing pin holes to achieve the connection between the sub-tire frame and the female tire frame.

[0015] Preferably, a plurality of sub-reinforcement brackets are provided between the sub-support frame and the sub-rectangular frame.

[0016] Preferably, the sub-support frame includes three equally spaced sub-support horizontal frames extending in the left-right direction, and three equally spaced sub-support vertical frames extending in the front-back direction;

[0017] The sub-support horizontal frames and the sub-support vertical frames are fixed vertically and crosswise to form a grid structure;

[0018] The sub-hoisting bracket is arranged between the vertically intersecting sub-support horizontal frame and the sub-support vertical frame, and the connection line of each sub-hoisting hole forms a rectangular structure;

[0019] The sub-reinforcement bracket is arranged between the sub-supporting horizontal frame and the sub-rectangular frame which intersect vertically.

[0020] Preferably, the sub-positioning cone is arranged on the corresponding sub-reinforcement bracket.

[0021] Preferably, a plurality of female reinforcing brackets are provided between the female support frame and the female rectangular frame.

[0022] Preferably, the mother support frame includes three mother support horizontal frames extending in the left-right direction at equal intervals, and three mother support vertical frames extending in the front-back direction at equal intervals;

[0023] The mother support horizontal frame and the mother support vertical frame are vertically cross-fixed to form a grid structure;

[0024] The mother hoisting bracket is arranged between the mother support horizontal frame and the mother support vertical frame which intersect vertically, and the connection line of each mother hoisting hole is a rectangular structure;

[0025] The female reinforcing bracket is arranged between the female supporting cross frame and the female rectangular frame which intersect vertically.

[0026] Preferably, the female positioning holes are provided on the corresponding female reinforcing brackets.

[0027] The invention also provides a steel plate assembling and welding method.

[0028] A steel plate assembly welding method is implemented based on a combined jig for steel plate assembly welding, comprising the following steps:

[0029] Step 1: Place the sub-frame on a flat surface, hoist the steel plates of equal thickness to be welded onto the sub-frame and complete the assembly. The front and back sides of the welding ends of each steel plate are grooved;

[0030] Step 2: On the sub-frame, perform double-wire submerged arc welding on the front groove between adjacent steel plates to complete the front welding between each steel plate;

[0031] Step 3: Connect the wire rope of the lifting equipment to each mother lifting hole of the mother frame, lift the mother frame above the sub-frame, and fix the mother frame to the sub-frame after it falls;

[0032] Step 4: Use the lifting equipment to lift, turn over and put the fixed sub-tire frame and mother tire frame into position. After the mother tire frame is put into position, it is placed on the flat ground.

[0033] Step 5: Release the fixed relationship between the sub-tire frame and the mother tire frame;

[0034] Step 6: Connect the wire rope of the lifting equipment to each sub-lifting hole of the sub-tie frame, and lift the sub-tie frame away, so that the panel after the front welding is completed is placed on the mother frame with the back of the panel facing up;

[0035] Step 7: On the mother frame, perform double-wire submerged arc welding on the back groove between adjacent steel plates to complete the back welding between each steel plate.

[0036] Preferably, in step 1, the front groove depth of the steel plate is h1, the back groove depth of the steel plate is h2, the thickness of the steel plate is t, the blunt edge height of the steel plate is t0, and the value range of t0 is 5 to 6 mm; wherein,

[0037] h1=3 / 5(t-t0) (1)

[0038] h2=2 / 5(t-t0) (2)

[0039] The angle α between the front grooves of adjacent steel plates ranges from 55° to 70°;

[0040] The included angle β between the back grooves of adjacent steel plates is in the range of 85° to 95°.

[0041] Preferably, in step 3, the steps of lowering the mother tire frame and fixing the daughter tire frame are as follows:

[0042] Step 31: Align each mother positioning hole of the mother tire frame with the sub-positioning cones on the corresponding sub-tire frame;

[0043] Step 32: The mother tire frame falls onto the child tire frame, and the mother positioning holes are plugged into the corresponding child positioning cones;

[0044] Step 33: Install locating pins in the corresponding left and right sub-fixing pin holes and the main fixing pin holes, and install shackles in the corresponding front and rear sub-lifting ears and the main lifting ears, thereby achieving a fixed connection between the sub-tire frame and the main tire frame.

[0045] The beneficial effects of the present invention are:

[0046] The present invention uses the arrangement of a sub-frame and a mother frame in combination with lifting equipment to turn over the panel after front welding, thereby avoiding the existing operation of welding lifting ears on the panel, saving time and avoiding damage to the steel plate surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0048] Figure 1 This is a schematic front view of the structure of the neutron tire carrier of the present invention;

[0049] Figure 2 This is a schematic top view of the structure of the neutron tire carrier of the present invention;

[0050] Figure 3 This is a schematic front view of the structure of the mother tire frame in the present invention;

[0051] Figure 4 It is a schematic top view of the structure of the mother tire frame in the present invention;

[0052] Figure 5 It is a schematic diagram of the structure when the steel plate to be welded is located on the sub-tire frame;

[0053] Figure 6 This is a schematic structural diagram of the mother tire frame and the daughter tire frame when aligned vertically in the present invention;

[0054] Figure 7 This is a schematic structural diagram of the mother tire frame and the daughter tire frame when they are fixedly connected in the present invention;

[0055] Figure 8 It is a structural diagram of the groove between adjacent steel plates;

[0056] Figure 9 Schematic diagram of the positions of the first electrode and the second electrode in the present invention;

[0057] in:

[0058] 10-sub-tire frame, 101-sub-rectangular frame, 102-sub-support frame, 103-sub-fixing cylinder, 104-sub-fixing pin hole, 105-sub-lifting ear, 106-sub-lifting bracket, 107-sub-lifting hole, 108-sub-positioning cone, 109-sub-reinforcement bracket, 110-sub-supporting horizontal frame, 111-sub-supporting vertical frame;

[0059] 20-mother tire frame, 201-mother rectangular frame, 202-mother support frame, 203-mother fixing cylinder, 204-mother fixing pin hole, 205-mother lifting ear, 206-mother lifting bracket, 207-mother lifting hole, 208-mother positioning hole, 209-mother reinforcement bracket, 210-mother support horizontal frame, 211-mother support vertical frame;

[0060] 30-steel plate, 301-warping;

[0061] 40-first electrode, 401-first electrode welding wire rod;

[0062] 50-second electrode, 501-second electrode welding wire rod;

[0063] 60- positioning pin;

[0064] 70-Shackle. DETAILED DESCRIPTION

[0065] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0066] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0067] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", and "top" are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

[0068] In the present invention, terms such as "connected" and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meanings of these terms in the present invention based on specific circumstances, and they should not be construed as limitations on the present invention.

[0069] The present invention will be further described below with reference to the accompanying drawings and examples.

[0070] Example 1:

[0071] A combined tire frame for assembling and welding steel plates, comprising a sub-tire frame 10 and a mother tire frame 20;

[0072] like Figure 1-2 As shown, the sub-tire frame 10 includes a sub-rectangular frame 101, and a sub-support frame 102 with a grid structure is fixedly arranged on the inner side of the sub-rectangular frame 101;

[0073] Two sub-fixing cylinders 103 are respectively provided at the front and rear ends of the sub-rectangular frame 101. Sub-fixing pin holes 104 extending in the left-right direction are provided on the sub-fixing cylinders 103. Two sub-hanging ears 105 are provided at the left end of the sub-rectangular frame 101.

[0074] Four sub-hoisting brackets 106 are provided on the sub-support frame 102, and sub-hoisting holes 107 are provided on the sub-hoisting brackets 106; two sub-positioning cones 108 are provided at the right end of the sub-support frame 102;

[0075] like Figure 3-4 As shown, the mother tire frame 20 includes a mother rectangular frame 201, and a mother support frame 202 with a grid structure is fixedly arranged on the inner side of the mother rectangular frame 201;

[0076] Two female fixing cylinders 203 are provided at the front and rear ends of the female rectangular frame 201, and female fixing pin holes 204 extending in the left and right directions are provided on the female fixing cylinders 203; two female lifting ears 205 are provided at the left end of the female rectangular frame 201;

[0077] Four female lifting brackets 206 are provided on the female support frame 202, and female lifting holes 207 are provided on the female lifting brackets 206; two female positioning holes 208 are provided at the right end of the female support frame 202;

[0078] After the sub-positioning cone 108 is aligned and plugged into the corresponding female positioning hole 208, the corresponding front and rear sub-lifting ears 105 and female lifting ears 205 are installed with shackles 70, and the corresponding left and right sub-fixing pin holes 104 and female fixing pin holes 204 are installed with positioning pins 60 to realize the connection between the sub-tire frame 10 and the mother tire frame 20.

[0079] During specific use, when the sub-tire frame 10 is connected to the mother tire frame 20, a jigsaw puzzle with completed front welding is placed inside. In order to achieve the clamping and flipping of jigsaw puzzles of different thicknesses, the diameter of the hanging hole on the sub-lifting ear 105 and the mother lifting ear 205 must be larger than the diameter of the locking rod in the shackle 70, and the diameter of the sub-fixing pin hole 104 and the mother fixing pin hole 204 must be larger than the diameter of the pin shaft in the positioning pin 60.

[0080] Preferably, a plurality of sub-reinforcement brackets 109 are provided between the sub-support frame 102 and the sub-rectangular frame 101 .

[0081] Preferably, the sub-support frame 102 includes three equally spaced sub-support horizontal frames 110 extending in the left-right direction, and three equally spaced sub-support vertical frames 111 extending in the front-back direction;

[0082] The sub-support horizontal frame 110 and the sub-support vertical frame 111 are vertically cross-fixed to form a grid structure;

[0083] The sub-hoisting bracket 106 is arranged between the vertically intersecting sub-support horizontal frame 110 and the sub-support vertical frame 111, and the connection line of each sub-hoisting hole 107 is a rectangular structure; specifically, a sub-hoisting bracket 106 is provided between the leftmost terminal support vertical frame 111 and the last terminal support horizontal frame 110, between the leftmost terminal support vertical frame 111 and the front terminal support horizontal frame 110, between the rightmost terminal support vertical frame 111 and the last terminal support horizontal frame 110, and between the rightmost terminal support vertical frame 111 and the front terminal support horizontal frame 110;

[0084] The sub-reinforcement elbow plate 109 is arranged between the vertically intersecting sub-support cross frame 110 and the sub-rectangular frame 101. Specifically, two sub-reinforcement elbow plates 109 are arranged between the left end of the front terminal support cross frame 110 and the sub-rectangular frame 101, and between the left end of the last terminal support cross frame 110 and the sub-rectangular frame 101. One sub-reinforcement elbow plate 109 is arranged between the right end of the front terminal support cross frame 110 and the sub-rectangular frame 101, and between the right end of the last terminal support cross frame 110 and the sub-rectangular frame 101.

[0085] Preferably, the sub-positioning cone 108 is provided on the corresponding sub-reinforcement bracket 109 .

[0086] Preferably, a plurality of female reinforcing brackets 209 are provided between the female support frame 202 and the female rectangular frame 201 .

[0087] Preferably, the mother support frame 202 includes three mother support horizontal frames 210 extending in the left-right direction at equal intervals, and three mother support vertical frames 211 extending in the front-back direction at equal intervals;

[0088] The mother support horizontal frame 210 and the mother support vertical frame 211 are vertically cross-fixed to form a grid structure;

[0089] The mother lifting bracket 206 is arranged between the mother support horizontal frame 210 and the mother support vertical frame 211 that intersect vertically, and the connection line of each mother lifting hole 207 is a rectangular structure; specifically, a mother lifting bracket 206 is provided between the leftmost mother support vertical frame 211 and the rearmost mother support horizontal frame 210, between the leftmost mother support vertical frame 211 and the frontmost mother support horizontal frame 210, between the rightmost mother support vertical frame 211 and the rearmost mother support horizontal frame 210, and between the rightmost mother support vertical frame 211 and the frontmost mother support horizontal frame 210;

[0090] The mother reinforcing elbow plate 209 is arranged between the mother supporting cross frame 210 and the mother rectangular frame 201 that intersect vertically. Specifically, two mother reinforcing elbow plates 209 are arranged between the left end of the frontmost mother supporting cross frame 210 and the mother rectangular frame 201, and between the left end of the rearmost mother supporting cross frame 210 and the mother rectangular frame 201. One mother reinforcing elbow plate 209 is arranged between the right end of the frontmost mother supporting cross frame 210 and the mother rectangular frame 201, and between the right end of the rearmost mother supporting cross frame 210 and the mother rectangular frame 201.

[0091] Preferably, the female positioning hole 208 is provided on the corresponding female reinforcing bracket 209 .

[0092] Example 2:

[0093] A steel plate assembly welding method is implemented based on the combined jig for steel plate assembly welding in Example 1, comprising the following steps:

[0094] Step 1: Place the sub-tire frame 10 on a flat surface. Figure 5 As shown, the steel plates 30 of equal thickness to be welded are hoisted onto the sub-tire frame 10 and assembled. The front and back sides of the welding ends of each steel plate 30 are grooved.

[0095] Preferably, in step 1, Figure 8 As shown, the front groove depth of the steel plate 30 is h1, the back groove depth of the steel plate 30 is h2, the thickness of the steel plate 30 is t, the blunt edge height of the steel plate 30 is t0, and the value range of t0 is 5 to 6 mm; wherein,

[0096] h1=3 / 5(t-t0) (1)

[0097] h2=2 / 5(t-t0) (2)

[0098] The angle α between the front grooves of adjacent steel plates ranges from 55° to 70°;

[0099] The included angle β between the back grooves of adjacent steel plates is in the range of 85° to 95°.

[0100] Step 2: On the sub-frame 10, double-wire submerged arc welding is performed on the front grooves between adjacent steel plates to complete the front welding between each steel plate 30; after the front welding is completed, warping 301 will be formed on both sides of the formed panel;

[0101] Step 3: Connect the wire rope of the lifting equipment to each of the mother lifting holes 207 of the mother frame 20, as shown in FIG. Figure 6 As shown, the mother tire frame 20 is hoisted above the child tire frame 10, and the mother tire frame 20 is fixed to the child tire frame 10 after falling, as shown in FIG. Figure 7 As shown;

[0102] Preferably, in step 3, the steps of lowering the mother tire frame 20 and fixing it to the daughter tire frame 10 are as follows:

[0103] Step 31: Align each mother positioning hole 208 of the mother tire frame 20 with the sub-positioning cone 108 on the corresponding sub-tire frame 10 vertically;

[0104] Step 32: The mother tire frame 20 falls onto the child tire frame 10, and the mother positioning holes 208 are plugged into the corresponding child positioning cones 108;

[0105] Step 33: Install the locating pins 60 in the corresponding left and right sub-fixing pin holes 104 and the main fixing pin holes 204, and install the shackles 70 in the corresponding front and rear sub-lifting ears 105 and the main lifting ears 205, so as to achieve a fixed connection between the sub-tire frame 10 and the main tire frame 20.

[0106] Step 4: Use the lifting equipment to lift, turn over, and put the sub-tire frame 10 and the mother tire frame 20 fixed together. After the mother tire frame 20 is put into place, it is placed on a flat surface.

[0107] Step 5: Release the fixed relationship between the sub-tire frame 10 and the mother tire frame 20;

[0108] Specifically, each positioning pin 60 is removed and each shackle 70 is disassembled to release the fixed relationship between the sub-tire frame 10 and the mother tire frame 20;

[0109] Step 6: Connect the wire rope of the lifting equipment to each sub-lifting hole 107 of the sub-tire frame 10, and lift the sub-tire frame 10 away, so that the panel after the front side welding is completed is placed on the mother tire frame 20 with the back side of the panel facing upward;

[0110] Step 7: On the mother frame 20, double-wire submerged arc welding is performed on the back grooves between adjacent steel plates to complete the back welding between each steel plate 30; the warping 301 formed by the front welding is balanced by the shrinkage of the back welding to keep the overall flatness of the panel.

[0111] In this application, double-wire submerged arc welding is used for both front and back welding between steel plates. Compared with traditional single-wire submerged arc automatic welding, the welding efficiency is greatly improved, the welding time of the panels is greatly shortened, the use of flux is reduced, and costs are saved.

[0112] Specifically, when performing double-wire submerged arc welding, the first electrode 40 and the second electrode 50 are distributed front and back along the length direction of the groove;

[0113] like Figure 9 As shown, the first electrode 40 is tilted forward by 12° to 18° from the vertical direction, and the length of the first electrode welding wire rod 401 is 35 to 45 mm;

[0114] The second electrode 50 is tilted backward by 8° to 10° from the vertical direction, and the length of the second electrode welding wire rod 501 is 30 to 40 mm;

[0115] The distance l between the end of the welding wire between the first electrode 40 and the second electrode 50 is 25 to 35 mm.

[0116] Specifically, when performing double-wire submerged arc welding, the number of weld passes at the front groove and the number of weld passes at the back groove between each adjacent steel plate are set according to the actual thickness of the steel plate and actual needs. The setting of the number of weld passes is the existing technology and will not be repeated here. The welding current, voltage, and welding rate of the double-wire submerged arc welding are matched with the number of weld passes to control the amount of welding deformation. The setting of the welding current, voltage, and welding rate of the double-wire submerged arc welding is also the existing technology.

[0117] The following are the relevant parameter settings for double-wire submerged arc welding when using the welding method of this application.

[0118] When welding the front groove:

[0119] During the first welding of each front groove, the current of the first electrode 40 is 565-635A, the voltage is 30-32V, and the welding rate is 682-844mm / min; the current of the second electrode 50 is 530-590A, the voltage is 31.5-34.5V, and the welding rate is 682-844mm / min;

[0120] During the remaining welding of each front groove, the current of the first electrode 40 is 755-845A, the voltage is 33-36V, and the welding rate is 602-744mm / min; the current of the second electrode 50 is 660-740A, the voltage is 35-38V, and the welding rate is 602-744mm / min;

[0121] When back groove welding:

[0122] During the first welding of each back groove, the current of the first electrode 40 is 850-950A, the voltage is 33.5-36.5V, and the welding rate is 577-712mm / min; the current of the second electrode 50 is 755-845A, the voltage is 35.5-38.5V, and the welding rate is 577-712mm / min;

[0123] During the remaining welding of each back groove, the current of the first electrode 40 is 755-845A, the voltage is 33-36V, and the welding rate is 602-744mm / min; the current of the second electrode 50 is 660-740A, the voltage is 35-38V, and the welding rate is 602-744mm / min.

[0124] Example 3:

[0125] Based on Example 2, multiple steel plates with a thickness of 49 mm were welded, where the groove parameters of the 49 mm thick steel plates were:

[0126] The front groove depth h1 of a 49mm thick steel plate is 26.1mm, the back groove depth h2 of a 49mm thick steel plate is 17.4mm, and the blunt edge height t0 of a 49mm thick steel plate is 5.5mm. The range of the angle α between the front grooves of adjacent steel plates is 60°, and the range of the angle β between the back grooves of adjacent steel plates is 90°.

[0127] During twin-wire submerged arc welding, the first electrode 40 is tilted forward by 15° from the vertical direction, and the length of the first electrode wire rod 401 is 40 mm;

[0128] The second electrode 50 is tilted backward by 9° from the vertical direction, and the length of the second electrode welding wire rod 501 is 35 mm;

[0129] The distance l between the end of the welding wire between the first electrode 40 and the second electrode 50 is 30 mm;

[0130] The number of weld passes at the front groove between each adjacent steel plate is 7, and the number of weld passes at the back groove is 8;

[0131] When welding the front groove:

[0132] During the first welding of each front groove, the current of the first electrode 40 was 600A, the voltage was 31V, and the welding rate was 689mm / min; the current of the second electrode 50 was 560A, the voltage was 33V, and the welding rate was 689mm / min;

[0133] During the remaining welding of each front groove, the current of the first electrode 40 was 800A, the voltage was 34.5V, and the welding rate was 608mm / min; the current of the second electrode 50 was 700A, the voltage was 36.5V, and the welding rate was 608mm / min;

[0134] When back groove welding:

[0135] During the first welding of each back groove, the current of the first electrode 40 was 900A, the voltage was 35V, and the welding rate was 582mm / min; the current of the second electrode 50 was 800A, the voltage was 37V, and the welding rate was 582mm / min;

[0136] During the remaining welding of each back groove, the current of the first electrode 40 was 800A, the voltage was 34.5V, and the welding rate was 608mm / min; the current of the second electrode 50 was 700A, the voltage was 36.5V, and the welding rate was 608mm / min.

[0137] By adopting the method of Example 2, a plurality of steel plates with a thickness of 49 mm were welded to form an overall flat panel.

[0138] Example 4:

[0139] Based on Example 2, multiple steel plates with a thickness of 49 mm were welded, where the groove parameters of the 49 mm thick steel plates were:

[0140] The front groove depth h1 of a 49mm thick steel plate is 26.4mm, the back groove depth h2 of a 49mm thick steel plate is 17.6mm, and the blunt edge height t0 of a 49mm thick steel plate is 5mm. The range of the angle α between the front grooves of adjacent steel plates is 55°, and the range of the angle β between the back grooves of adjacent steel plates is 85°.

[0141] During twin-wire submerged arc welding, the first electrode 40 is tilted forward 12° from the vertical direction, and the length of the first electrode wire rod 401 is 35 mm;

[0142] The second electrode 50 is tilted backward 8° from the vertical direction, and the length of the second electrode welding wire rod 501 is 30 mm;

[0143] The distance l between the end of the welding wire between the first electrode 40 and the second electrode 50 is 25 mm.

[0144] The number of weld passes at the front groove between each adjacent steel plate is 7, and the number of weld passes at the back groove is 8;

[0145] When welding the front groove:

[0146] During the first welding of each front groove, the current of the first electrode 40 was 565A, the voltage was 30V, and the welding rate was 682mm / min; the current of the second electrode 50 was 530A, the voltage was 31.5V, and the welding rate was 682mm / min;

[0147] During the remaining welding of each front groove, the current of the first electrode 40 was 755A, the voltage was 33V, and the welding rate was 602mm / min; the current of the second electrode 50 was 660A, the voltage was 35V, and the welding rate was 602mm / min;

[0148] When back groove welding:

[0149] During the first welding of each back groove, the current of the first electrode 40 was 850A, the voltage was 33.5V, and the welding rate was 577mm / min; the current of the second electrode 50 was 755A, the voltage was 35.5V, and the welding rate was 577mm / min;

[0150] During the remaining welding of each back groove, the current of the first electrode 40 was 755A, the voltage was 33V, and the welding rate was 602mm / min; the current of the second electrode 50 was 660A, the voltage was 35V, and the welding rate was 602mm / min.

[0151] By adopting the method of Example 2, a plurality of steel plates with a thickness of 49 mm were welded to form an overall flat panel.

[0152] Example 5:

[0153] Based on Example 2, multiple steel plates with a thickness of 49 mm were welded, where the groove parameters of the 49 mm thick steel plates were:

[0154] The front groove depth h1 of a 49mm thick steel plate is 25.8mm, the back groove depth h2 of a 49mm thick steel plate is 17.2mm, and the blunt edge height t0 of a 49mm thick steel plate is 6mm. The range of the angle α between the front grooves of adjacent steel plates is 70°, and the range of the angle β between the back grooves of adjacent steel plates is 95°.

[0155] During twin-wire submerged arc welding, the first electrode 40 is tilted forward 18° from the vertical direction, and the length of the first electrode wire rod 401 is 45 mm;

[0156] The second electrode 50 is tilted backward by 10° from the vertical direction, and the length of the second electrode welding wire rod 501 is 40 mm;

[0157] The distance l between the end of the welding wire between the first electrode 40 and the second electrode 50 is 35 mm.

[0158] The number of weld passes at the front groove between each adjacent steel plate is 7, and the number of weld passes at the back groove is 8;

[0159] When welding the front groove:

[0160] During the first welding of each front groove, the current of the first electrode 40 was 635A, the voltage was 32V, and the welding rate was 844mm / min; the current of the second electrode 50 was 590A, the voltage was 34.5V, and the welding rate was 844mm / min;

[0161] During the remaining welding of each front groove, the current of the first electrode 40 was 845A, the voltage was 36V, and the welding rate was 744mm / min; the current of the second electrode 50 was 740A, the voltage was 38V, and the welding rate was 744mm / min;

[0162] When back groove welding:

[0163] During the first welding of each back groove, the current of the first electrode 40 was 950A, the voltage was 36.5V, and the welding rate was 712mm / min; the current of the second electrode 50 was 845A, the voltage was 38.5V, and the welding rate was 712mm / min;

[0164] During the remaining welding of each back groove, the current of the first electrode 40 was 845A, the voltage was 36V, and the welding rate was 744mm / min; the current of the second electrode 50 was 740A, the voltage was 38V, and the welding rate was 744mm / min.

[0165] By adopting the method of Example 2, a plurality of steel plates with a thickness of 49 mm were welded to form an overall flat panel.

[0166] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A combined jig for assembling and welding steel plates, characterized in that: Including the fetal frame and the mother frame; The sub-tire frame comprises a sub-rectangular frame, and a sub-support frame in a grid structure is fixedly arranged inside the sub-rectangular frame; Two sub-fixing tubes are respectively provided at the front and rear ends of the sub-rectangular frame, and sub-fixing pin holes extending in the left and right directions are provided on the sub-fixing tubes; two sub-hanging ears are provided at the left end of the sub-rectangular frame; Four sub-hoisting brackets are provided on the sub-support frame, and sub-hoisting holes are provided on the sub-hoisting brackets; two sub-positioning cones are provided at the right end of the sub-support frame; The mother tire frame comprises a mother rectangular frame, and a mother support frame in a grid structure is fixedly arranged on the inner side of the mother rectangular frame; Two female fixing cylinders are respectively provided at the front and rear ends of the female rectangular frame, and the female fixing cylinders are provided with female fixing pin holes extending in the left and right directions; two female lifting ears are provided at the left end of the female rectangular frame; Four female lifting brackets are provided on the female support frame, and female lifting holes are provided on the female lifting brackets; two female positioning holes are provided on the right end of the female support frame; After the sub-positioning cone is aligned and plugged into the corresponding female positioning hole, shackles are installed in the front and rear corresponding sub-lifting ears and female lifting ears, and positioning pins are installed in the left and right corresponding sub-fixing pin holes and female fixing pin holes to achieve the connection between the sub-tire frame and the female tire frame.

2. The combined jig for assembling and welding steel plates according to claim 1, characterized in that: A plurality of sub-reinforcement brackets are arranged between the sub-support frame and the sub-rectangular frame.

3. The combined jig for assembling and welding steel plates according to claim 2, characterized in that: The sub-support frame includes three equally spaced sub-support horizontal frames extending in the left-right direction, and three equally spaced sub-support vertical frames extending in the front-back direction; The sub-support horizontal frames and the sub-support vertical frames are fixed vertically and crosswise to form a grid structure; The sub-hoisting bracket is arranged between the vertically intersecting sub-support horizontal frame and the sub-support vertical frame, and the connection line of each sub-hoisting hole forms a rectangular structure; The sub-reinforcement bracket is arranged between the sub-supporting horizontal frame and the sub-rectangular frame which intersect vertically.

4. The combined jig for assembling and welding steel plates according to claim 3, characterized in that: The sub-positioning cones are arranged on the corresponding sub-reinforcement brackets.

5. The combined jig for assembling and welding steel plates according to claim 1, characterized in that: A plurality of female reinforcing brackets are arranged between the female support frame and the female rectangular frame.

6. The combined jig for assembling and welding steel plates according to claim 5, characterized in that: The mother support frame includes three mother support horizontal frames extending in the left-right direction at equal intervals, and three mother support vertical frames extending in the front-back direction at equal intervals; The mother support horizontal frame and the mother support vertical frame are vertically cross-fixed to form a grid structure; The mother hoisting bracket is arranged between the mother support horizontal frame and the mother support vertical frame which intersect vertically, and the connection line of each mother hoisting hole is a rectangular structure; The female reinforcing bracket is arranged between the female supporting cross frame and the female rectangular frame which intersect vertically.

7. The combined jig for assembling and welding steel plates according to claim 6, characterized in that: The female positioning holes are arranged on the corresponding female reinforcing brackets.

8. A steel plate assembly and welding method, characterized in that: The method is implemented based on the combined jig for assembling and welding steel plates according to any one of claims 1 to 7, comprising the following steps: Step 1: Place the sub-frame on a flat surface, hoist the steel plates of equal thickness to be welded onto the sub-frame and complete the assembly. The front and back sides of the welding ends of each steel plate are grooved; Step 2: On the sub-frame, perform double-wire submerged arc welding on the front groove between adjacent steel plates to complete the front welding between each steel plate; Step 3: Connect the wire rope of the lifting equipment to each mother lifting hole of the mother frame, lift the mother frame above the sub-frame, and fix the mother frame to the sub-frame after it falls; Step 4: Use the lifting equipment to lift, turn over and put the fixed sub-tire frame and mother tire frame into position. After the mother tire frame is put into position, it is placed on the flat ground. Step 5: Release the fixed relationship between the sub-tire frame and the mother tire frame; Step 6: Connect the wire rope of the lifting equipment to each sub-lifting hole of the sub-tie frame, and lift the sub-tie frame away, so that the panel after the front welding is completed is placed on the mother frame with the back of the panel facing up; Step 7: On the mother frame, perform double-wire submerged arc welding on the back groove between adjacent steel plates to complete the back welding between each steel plate.

9. The steel plate assembly welding method according to claim 8, characterized in that: In step 1, the front groove depth of the steel plate is h1, the back groove depth of the steel plate is h2, the thickness of the steel plate is t, the blunt edge height of the steel plate is t0, and the value range of t0 is 5 to 6 mm; wherein, h1=3 / 5(t-t0) (1) h2=2 / 5(t-t0) (2) The angle α between the front grooves of adjacent steel plates ranges from 55° to 70°; The included angle β between the back grooves of adjacent steel plates is in the range of 85° to 95°.

10. The steel plate assembly welding method according to claim 8, characterized in that: In step 3, the steps of lowering the mother tire frame and fixing the daughter tire frame are as follows: Step 31: Align each mother positioning hole of the mother tire frame with the sub-positioning cones on the corresponding sub-tire frame; Step 32: The mother tire frame falls onto the child tire frame, and the mother positioning holes are plugged into the corresponding child positioning cones; Step 33: Install locating pins in the corresponding left and right sub-fixing pin holes and the main fixing pin holes, and install shackles in the corresponding front and rear sub-lifting ears and the main lifting ears, thereby achieving a fixed connection between the sub-tire frame and the main tire frame.

Images