Rapid assembling and adjusting equipment and method for circumferential welding of shell

Abstract

The invention relates to rapid assembling and adjusting equipment and method for shell circumferential welding. The equipment comprises a bed body assembly, a bed head assembly, a bed tail assembly and a supporting seat assembly. The bed head assembly is fixed at one end of the bed body and comprises a bed head frame, a circle supporting mechanism and a positioning flange; the bed tail assembly can move on the bed body and comprises a bed tail frame and a three-jaw chuck; and the metal shell can be radially expanded by the circle expanding mechanism, so that the circular seam gap and the step to be welded meet the process requirements, and the welding quality and efficiency are improved. The using method comprises the steps that all the sections of the shell are assembled in sequence, circle correction and welding are conducted through the circle supporting mechanism, and continuous assembling and welding of the multiple sections of the shell are achieved. The welding device is suitable for welding of small-caliber long-size metal shells, operation is easy, efficiency is high, and the percent of pass is high.

Description

Technical Field

[0001] The invention relates to the technical field of solid rocket engine casing molding, and in particular to a casing circumferential welding rapid assembly and adjustment device and a welding method. Background Art

[0002] With the rapid development of the aerospace industry, low-cost rocket engine casing forming technology has been widely used. In particular, small-diameter metal engine casing welding has begun to appear in large quantities in production. This type of small-sized engine casing needs to be assembled and welded after the segmented processing is completed, but it faces many problems in actual production:

[0003] 1. The traditional assembly method usually uses segmented assembly and then laser welding equipment for welding. This method is inefficient and increases the turnaround time between processes;

[0004] 2. The existing assembly and adjustment equipment cannot ensure the coaxiality and roundness of the shell, which makes the welded product prone to unqualified phenomenon;

[0005] 3. For the welding of long shells, there is a lack of effective support methods, which easily causes welding deformation;

[0006] 4. The sealing of the protective gas during welding is difficult to ensure, which affects the welding quality.

[0007] Therefore, there is an urgent need for a fast adjustment equipment with high automation and good adjustment accuracy to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a device and method for rapid adjustment of circumferential welding of metal shells, optimize the welding adjustment process, realize online continuous assembly and welding of multiple shell sections, and improve production efficiency and product qualification rate.

[0009] To achieve the above-mentioned object, in a first aspect, the present invention provides a shell circumferential welding rapid assembly and adjustment device, comprising:

[0010] Bed assembly, including bed;

[0011] A bed head assembly, used to fix one of the parts to be welded, is arranged at one end of the bed, and includes a positioning flange assembly for fixing one end of the above-mentioned part to be welded, and a supporting mechanism assembly that can extend from the other end of the above-mentioned part to be welded and is used to correct the welding position of the two parts to be welded;

[0012] The bed foot assembly is arranged at the other end of the bed and is used to clamp one end of another part to be welded;

[0013] The support seat assembly is arranged on the bed body and is used for supporting the parts to be welded clamped by the bed tail assembly.

[0014] In some optional embodiments of the present invention, the headboard assembly also includes a headboard frame assembly fixed to the bed frame; the positioning flange assembly is fixed to the headboard frame assembly; the support circle mechanism assembly is slidably connected to the headboard frame assembly and passes through the positioning flange assembly.

[0015] In some optional embodiments of the present invention, the support circle mechanism assembly includes: a mounting base plate; a support circle bearing seat arranged on the mounting base plate; a sleeve shaft rotatably connected to the support circle bearing seat; a support rod coaxially arranged in the sleeve shaft; one end of the support rod is connected to a support rod driving mechanism, and the other end drives the support circle mechanism to open to correct the welding point of two parts to be welded; the support rod driving mechanism drives the support rod to move axially in the sleeve shaft.

[0016] Preferably, the support rod mechanism includes a support circular fixing flange fixed on the end of the sleeve shaft; a plurality of sliding blocks circumferentially distributed on the support circular fixing flange; a support head fixed on the support rod; an adjustment block fixed on the outer wall of the support head and adapted to the sliding block; a connecting rod hinged at both ends on the adjustment block and the sliding block respectively; the axial movement of the support rod drives the adjustment block to move, thereby driving the sliding block to move radially along the support circular fixing flange to correct the welding point of the two parts to be welded.

[0017] Further preferably, each of the sliding blocks is connected to a copper lining; the top of the copper lining is an arc surface, and a groove is provided on the top; during welding, the weld is aligned with the groove.

[0018] Further preferably, the support circle fixing flange and the support rod end are both provided with sealing plates; the support rod is a hollow structure, with a pneumatic rotary joint installed at one end and a radial through hole at the other end, and the radial through hole is located between the two sealing plates; argon gas is introduced into the space between the sealing plates through the radial through hole to form welding gas protection.

[0019] Preferably, the circle-supporting mechanism assembly also includes a strut fixing bracket fixed on the mounting base plate for supporting the strut; the strut driving mechanism includes a transmission mechanism threadedly connected to the strut; and a driving machine that drives the transmission mechanism to rotate and realizes axial movement of the strut through threaded transmission.

[0020] Further preferably, the transmission mechanism includes a driven wheel threadedly connected to the support rod, a driving wheel rotatably connected to the mounting base, and a supporting motor driving the driving wheel; an electromagnetic clutch is provided between the supporting motor and the driving wheel.

[0021] Preferably, the circle-supporting mechanism assembly further includes a flange fixed on the sleeve shaft; and an electromagnetic push rod for locking and releasing the flange.

[0022] In some optional embodiments of the present invention, the positioning flange assembly includes a positioning flange bearing seat, a flange shaft rotatably connected to the positioning flange bearing seat; a positioning flange fixed at one end of the flange shaft for fixing one end of the part to be welded; and a flange shaft driving mechanism for driving the flange shaft to rotate.

[0023] Preferably, the flange shaft driving mechanism comprises: a large pulley fixed to one end of the flange shaft, a small pulley fixedly rotatably connected to a positioning flange bearing seat, and a flange shaft motor driving the small pulley to rotate the large pulley.

[0024] In some optional embodiments of the present invention, the footrest assembly includes: a footrest frame slidably connected to the bed assembly; a three-jaw chuck provided on the footrest frame for clamping one end of another part to be welded; and a footrest drive mechanism for driving the footrest frame to move axially along the support circle mechanism assembly.

[0025] In some optional embodiments of the present invention, the support assembly includes: a support frame slidably connected to the bed assembly; a lifting plate installed above the support frame through a linear bearing; a universal ball set fixed on the lifting plate for supporting the parts to be welded clamped by the foot assembly; and a lifting screw assembly for adjusting the stroke of the lifting plate.

[0026] Preferably, the universal ball joint group is fixed to the two ends of the supporting linear slide rail through two relatively arranged adjustment frames, the supporting linear slide rail is fixed to the lifting plate, and the relative positions of the two adjustment frames are adjusted by the universal ball screw assembly to adapt to parts to be welded of different sizes.

[0027] In a second aspect, the present invention provides a method for rapid assembly and adjustment of circumferential welding of a shell, comprising the following steps:

[0028] Clean the shell to be welded before welding and mark them by number according to the welding sequence;

[0029] Lift the first shell to the foot of the bed assembly to complete the installation and alignment; lift the second shell to the head of the bed assembly for positioning;

[0030] Move the support mechanism assembly to a suitable position so that the groove in the middle of the copper lining is aligned with the welding annular seam;

[0031] The rounding mechanism assembly is started to round the shell, and the pressing force of the lathe tail assembly is adjusted to round the first shell and the second shell at the same time;

[0032] Introduce argon gas for protection, start the positioning flange assembly to drive the shell to rotate, and perform laser welding;

[0033] After welding is completed, the supporting mechanism is folded and the welding of the next set of shells is carried out.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention adopts an online continuous assembly method, which does not require segmented assembly and then welding, greatly improving production efficiency;

[0036] 2. The rounding mechanism of the present invention adopts an umbrella-shaped rounding structure, and the shell is rounded by the copper lining evenly expanded radially, which can effectively ensure the roundness of the shell;

[0037] 3. The device structure of the present invention is reasonably designed, and the components are closely matched, which can ensure that the gap and step of the welding annular seam are controlled within a small range, thereby improving the welding quality;

[0038] 4. The present invention solves the support problem during welding of a long shell through the design of the support seat assembly, and further improves the welding accuracy;

[0039] 5. The present invention adopts a pneumatic rotary joint and a sealing structure design to achieve effective gas protection during the welding process and ensure the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments disclosed in the present invention, the drawings of the embodiments will be briefly introduced below. These drawings are only used for illustrative purposes and are not intended to limit the protection scope of the present invention.

[0041] Figure 1 It is a schematic diagram of the overall structure of the shell circumferential weld rapid assembly and adjustment device of the present invention;

[0042] Figure 2 It is a structural schematic diagram of the bed assembly of the present invention;

[0043] Figure 3 It is a schematic diagram of the overall structure of the bedside assembly of the present invention;

[0044] Figure 4 It is an overall schematic diagram of the bedside frame assembly of the present invention;

[0045] Figure 5 It is a structural schematic diagram of the circle-supporting mechanism assembly of the present invention;

[0046] Figure 6 It is a partial exploded schematic diagram of the circle-supporting mechanism assembly of the present invention;

[0047] Figure 7 It is a structural schematic diagram of the positioning flange assembly of the present invention;

[0048] Figure 8 It is a structural schematic diagram of the foot of the bed assembly of the present invention;

[0049] Fig. 9 It is a structural schematic diagram of the support seat assembly of the present invention. DETAILED DESCRIPTION

[0050] The technical solution of the present invention (including the preferred technical solution) is further described in detail below by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0051] Example 1

[0052] like Figures 1 to 7 As shown, this embodiment provides a shell circumferential welding rapid assembly and adjustment device, which is mainly used for the circumferential welding of small-diameter rocket engine shells. The entire device is fixed on the horizontal ground of the factory building, including a bed assembly 1, a head assembly 2, a tail assembly 3, a support seat assembly 4 and an electrical control assembly 5.

[0053] The bed assembly 1 is the foundation of the whole equipment, and is composed of a bed 1.1 welded from steel plates. The bed 1.1 is provided with a drag chain assembly 1.2, a rack 1.3, a linear track 1 1.4, an adjustment pad 1.5 and a linear track 2 1.6. Among them:

[0054] The drag chain assembly 1.2 is fixed to the bed 1.1 by screws and is used to arrange electrical circuits and gas pipelines;

[0055] The rack 1.3 and the linear track 1.4 are arranged on the upper plane of the bed 1.1 and are used for the movement of the foot assembly 3;

[0056] The second linear track 1.6 is arranged on the concave plane of the bed 1.1 and is used for position adjustment of the support seat assembly 4;

[0057] The adjusting shim 1.5 is fixed on the bottom plane of the bed 1.1 and is used to adjust the levelness of the equipment.

[0058] The headstock assembly 2 is fixed to one end of the bed 1.1, and is mainly composed of a headstock frame assembly 2.1, a rounding mechanism assembly 2.2, and a positioning flange assembly 2.3. The rounding mechanism assembly 2.2 is coaxially arranged with the positioning flange assembly 2.3, and the rounding mechanism assembly 2.2 can move linearly along a pair of linear tracks to meet the adjustment requirements of shells of different lengths. The positioning flange assembly 2.3 is used to support one end of the metal shell to be welded.

[0059] Bedside frame assembly 2.1 includes:

[0060] The bedside frame 2.1.1 is fixed to the bed frame 1.1 by screws;

[0061] The linear module 2.1.2 and the linear guide rail 2.1.3 are arranged on the upper plane of the bedside frame 2.1.1;

[0062] The machine cover 2.1.4 is fixed to the upper plane of the bedside frame 2.1.1 with screws to protect the moving parts.

[0063] The supporting circle mechanism assembly 2.2 is fixed as a whole on the slider of the linear guide rail 2.1.3, and the linear module 2.1.2 can push the supporting circle mechanism assembly 2.2 to perform linear motion.

[0064] The rounding mechanism assembly 2.2 mainly completes the task of correcting the metal shell. The assembly is connected to the bedside frame assembly 2.1 through the mounting base plate 2.2.1, and specifically includes:

[0065] Support system:

[0066] The support rod fixing bracket 2.2.2 cooperates with the sleeve shaft 2.2.14 to support the support rod 2.2.7;

[0067] The sleeve shaft 2.2.14 is fixed on the bearing seat 2.2.11 through the bearing 2.2.8;

[0068] The support rod 2.2.7 is coaxial with the sleeve shaft 2.2.14, and axial positioning is achieved through the thrust bearing 2.2.10. Drive system:

[0069] One end of the support rod 2.2.7 is equipped with a pneumatic rotary joint 2.2.3 and a driven sprocket in the sprocket pair 2.2.6; the motor 2.2.4 drives the active sprocket in the sprocket pair 2.2.6 through the electromagnetic clutch 2.2.5; the chain 2.2.9 connects the two sprockets to realize power transmission.

[0070] Locking system:

[0071] The electromagnetic push rod 2.2.12 is fixed on the bearing seat 2.2.11;

[0072] The flange 2.2.13 is fixed on the sleeve shaft 2.2.14;

[0073] The electromagnetic push rod 2.2.12 can lock the flange 2.2.13.

[0074] Supporting system:

[0075] The support circle fixing flange 2.2.15 is fixed to the end of the sleeve shaft 2.2.14;

[0076] The positioning plate 2.2.17 cooperates with the support circle fixing flange 2.2.15 to constrain the radial movement of the sliding block 2.2.18; the copper lining 2.2.16 is fixed on the sliding block 2.2.18 to adapt to metal shells of different diameters;

[0077] The support head 2.2.21 is fixed to the other end of the support rod 2.2.7;

[0078] The adjusting block 2.2.20 is mounted on the supporting head 2.2.21;

[0079] The two ends of the connecting rod 2.2.19 are respectively hinged to the adjusting block 2.2.20 and the sliding block 2.2.18.

[0080] Sealing system:

[0081] Two sets of sealing plates 2.2.22 are fixed on the support rod 2.2.7 and the sleeve shaft 2.2.14 respectively;

[0082] Creates a closed area for welding gas protection.

[0083] The circle-supporting mechanism adopts an umbrella-shaped circle-supporting structure, which has the following characteristics:

[0084] The sleeve shaft 2.2.14 can rotate freely;

[0085] The support rod 2.2.7 slides in the sleeve shaft 2.2.14;

[0086] The copper lining 2.2.16 can be radially expanded to correct the deformation of the thin-walled metal shell;

[0087] The round support mechanism can move axially to adapt to metal shells of different lengths;

[0088] Argon gas can be introduced into the support rod 2.2.7 through the pneumatic rotary joint 2.2.3;

[0089] The radial openings on the support rod 2.2.7 allow argon gas to enter the sealing area for protection.

[0090] The rounding mechanism assembly 2.2 completes the correction task of the metal shell. All parts are installed on the bedside frame assembly 2 through the mounting base plate 2.2.1, including: the support rod fixing bracket 2.2.2 is installed on the mounting base plate 2.2.1, and supports the support rod 2.2.7 together with the sleeve shaft 2.2.14; the sleeve shaft 2.2.14 is fixed on the bearing seat 2.2.11 through the bearing 2.2.8; the support rod 2.2.7 is coaxial with the hollow sleeve shaft 2.2.14, and the thrust bearing 2.2.10 is used to axially connect the support rod 2.2.7 and the hollow sleeve shaft 2.2.14. The support rod 2.2.7 is a hollow structure, and one end of the support rod is equipped with a pneumatic rotary joint 2.2.3 and a sprocket in the sprocket pair 2.2.6, which is threadedly connected to the support rod; the motor 2.2.4 drives the other sprocket in the sprocket pair 2.2.6 through the electromagnetic clutch 2.2.5, and the chain 2.2.9 connects the two sprockets; the electromagnetic push rod 2.2.12 is fixed on the bearing seat 2.2.11, which can lock the flange 2.2.13, and the flange 2.2.13 is fixed on the sleeve shaft 2.2.14. A support circle fixing flange 2.2.15 is fixed to the other end of the sleeve shaft 2.2.14; the support circle fixing flange 2.2.15 and the positioning plate 2.2.17 can constrain a group of circumferentially distributed sliding blocks 2.2.18 to slide radially; the copper liner 2.2.16 is fixed on the sliding block 2.2.18 to adapt to metal shells of different diameters; a support head 2.2.21 is fixed to the other end of the support rod 2.2.7, and a group of circumferentially distributed adjusting blocks 2.2.20 are installed on the support head 2.2.21. The adjusting block 2.2.20 can push the connecting rod 2.2.19 to make the sliding block 2.2.18 fixed on the other end of the connecting rod 2.2.19 move radially; there are two groups of sealing plates 2.2.22, which are respectively fixed on the support rod 2.2.7 and the sleeve shaft 2.2.14 to form a closed area.

[0091] The entire rounding mechanism adopts an umbrella-shaped rounding structure, the hollow sleeve shaft 2.2.14 can rotate freely, and the support rod 2.2.7 slides in the sleeve shaft 2.2.14, so that the copper liner 2.2.16 can be radially expanded to round the deformed thin-walled metal shell cylinder section. The rounding mechanism can move axially and adjust the cantilever length to adapt to metal shells of different lengths.

[0092] The support rod 2.2.7 is hollow, and argon gas can be introduced through the pneumatic rotary joint 2.2.3; radial holes are opened at corresponding positions of the support rod 2.2.7, so that argon gas can enter the closed area formed by the sealing plate 2.2.22 and the local space of the metal shell to be welded, so as to provide welding gas protection.

[0093] The positioning flange assembly 2.3 is fixed on the bedside frame 2.1.1 and is coaxially arranged with the supporting mechanism assembly 2.2, and mainly includes:

[0094] The bearing seat 2.3.1 is fixed on the bedside frame 2.1.1;

[0095] The flange shaft 2.3.2 is rotated by the bearing 2.3.8;

[0096] The large pulley 2.3.3 is installed at one end of the flange shaft 2.3.2;

[0097] The positioning flange 2.3.4 is installed at the other end of the flange shaft 2.3.2;

[0098] Motor 2 2.3.7 is mounted on motor bracket 2.3.6;

[0099] The small pulley 2.3.5 is fixed on the motor output shaft;

[0100] The synchronous belt 2.3.8 connects the large and small pulleys to realize transmission.

[0101] The bed foot assembly 3 is fixed to the other end of the bed body 1.1, and mainly includes:

[0102] Mobile System:

[0103] The bed end frame 3.1 is mounted on a linear slide rail;

[0104] The motor 3.2 is fixed to the bed end frame 3.1 through the bracket 3.3;

[0105] Gear 3.4 is mounted on the output shaft of motor 3.2 and meshes with the rack on the bed. Locking system:

[0106] The locking frame 3.5 is fixed on the bed end frame 3.1;

[0107] The bed foot frame 3.1 can be locked on the bed body 1.1 by rotating the locking rod 3.6.

[0108] Clamping system:

[0109] The three-jaw chuck 3.8 is mounted on the lathe tailstock assembly 3.7;

[0110] The lathe tail top assembly 3.7 is fixed on the bed tail frame 3.1;

[0111] It is coaxially arranged with the circle supporting mechanism assembly 2.2.

[0112] The support seat assembly 4 is provided with two sets for supporting the metal shell, mainly including: support frame system:

[0113] The support frame 4.1 is fixed on the linear slide rail of the bed;

[0114] Four linear bearings 4.2 are mounted on the support frame 4.1;

[0115] The support rod 4.3 passes through the linear bearing 4.2 and can slide up and down.

[0116] Lifting system:

[0117] The lifting plate 4.9 is connected to the upper end of the support rod 4.3;

[0118] The lifting screw 4.10 is fixed on the lifting plate 4.9;

[0119] The screw nut 4.11 cooperates with the bearing 4.12 to drive the lifting plate 4.9 to move up and down. Adjustment system:

[0120] The upper linear guide rail 4.6 is mounted on the lifting plate 4.9;

[0121] Two adjustment frames 4.5 are mounted on the linear guide rail 4.6;

[0122] The lead screw 4.7 is mounted on the lifting plate 4.9 through a bearing;

[0123] The hand wheel 4.4 drives the lead screw 4.7;

[0124] A plurality of universal balls 4.8 are mounted on the adjustment frame 4.5.

[0125] The electrical control assembly 5 includes various components such as various wires, signal lines, air pipes, solenoid valves, electric control cabinets, touch screens, frequency conversion controllers, PLCs, etc. to realize programmable control.

[0126] The beneficial effects of the present invention are:

[0127] 1. Improve welding quality: adopt inner support circle mechanism to ensure small gap and step at both ends of the annular seam and high welding quality.

[0128] 2. Improve assembly efficiency: Multiple shell sections can be operated continuously, reducing repeated lifting and alignment, and improving assembly efficiency.

[0129] 3. Easy operation: The equipment can be programmable and easy to operate, reducing human errors.

[0130] 4. Reduce production costs: save the amount of shielding gas during welding and reduce production costs.

[0131] 5. Strong applicability: The equipment is adjustable and suitable for welding thin-walled metal shells of different lengths and diameters.

[0132] Example 2

[0133] This embodiment provides a shell circumferential welding rapid assembly method, the specific steps are as follows:

[0134] 1. Preparation before welding

[0135] (1) Clean the surface of the shell to be welded:

[0136] Wipe the weld area with acetone or anhydrous ethanol;

[0137] Remove surface oil, oxide layer and other impurities;

[0138] Ensure that the metal surface in the weld area is clean;

[0139] (2) Shell number marking:

[0140] Numbering according to welding sequence;

[0141] Mark non-welding areas;

[0142] Make sure the markings are clearly visible;

[0143] 2. Shell clamping and positioning;

[0144] (1) First housing clamping:

[0145] Use lifting equipment to lift the shell to the foot of the bed assembly;

[0146] Insert the end of the housing into the three-jaw chuck 3.8;

[0147] Adjust the clamping force of the three-jaw chuck 3.8;

[0148] Check the coaxiality between the shell axis and the center line of the equipment;

[0149] Make fine-tuning adjustments when necessary;

[0150] (2) Second housing clamping:

[0151] Lift the shell to the head assembly;

[0152] Fix the shell end on the positioning flange 2.3.4;

[0153] Adjust the position of the shell to make the two shell sections butt joint;

[0154] Ensure uniform weld gaps;

[0155] 3. Adjustment of the supporting mechanism;

[0156] (1) Position adjustment:

[0157] Start linear module 2.1.2;

[0158] Move the circle supporting mechanism assembly 2.2 to a suitable position;

[0159] Align the groove in the middle of the copper lining 2.2.16 with the welding annular seam; lock the electromagnetic push rod 2.2.12;

[0160] (2) Circle support operation:

[0161] Start the motor - 2.2.4;

[0162] The support rod 2.2.7 is driven to move axially through the sprocket transmission system; the adjustment block 2.2.20 pushes the connecting rod 2.2.19;

[0163] Drive the sliding block 2.2.18 to move radially;

[0164] The copper lining 2.2.16 is in contact with the inner wall of the shell;

[0165] Realize synchronous support of the weld seam;

[0166] 4. Preparation of welding environment;

[0167] (1) Gas protection:

[0168] Check the tightness of the gas system;

[0169] Introduce argon gas through pneumatic rotary joint 2.2.3;

[0170] Enter the sealing area through the radial hole 2.2.7 of the support rod;

[0171] Regulate gas flow;

[0172] Make sure the welding area is filled with shielding gas;

[0173] (2) Rotation system preparation:

[0174] Starter motor II 2.3.7;

[0175] Drive the positioning flange 2.3.4 to rotate through the belt transmission system; adjust the speed to a suitable value;

[0176] 5. Welding operation;

[0177] (1) Welding parameter setting:

[0178] Set the laser power;

[0179] Adjust welding speed;

[0180] Determine the welding focus position;

[0181] (2) Test welding:

[0182] Conduct test welds in non-critical locations;

[0183] Observe weld formation;

[0184] Adjust parameters if necessary;

[0185] (3) Formal welding:

[0186] Start the laser;

[0187] Start circumferential welding;

[0188] Real-time monitoring of welding process;

[0189] Observe the weld formation;

[0190] 6. Post-weld treatment

[0191] (1) Retract the support mechanism:

[0192] Reversing motor - 2.2.4;

[0193] Retract the struts 2.2.7;

[0194] Sliding block 2.2.18 returns to its original position;

[0195] The copper lining 2.2.16 is separated from the inner wall of the shell;

[0196] (2) Shell unloading:

[0197] Release the three-jaw chuck 3.8;

[0198] Release the fixing of the positioning flange 2.3.4;

[0199] Lift and take out the welded shell;

[0200] Proceed to the next set of welds.

[0201] 1. Preliminary preparation: Clean the sections of the shell to be welded and mark them in the welding order, numbering them 1, 2, 3...N.

[0202] 2. Clamping and alignment: hoist the No. 1 shell segment to the bed foot assembly 3, operate the three-jaw chuck 3.8 and the lathe tail top assembly 3.7 to complete the clamping and alignment of the thin-walled cylindrical shell; hoist the No. 2 shell segment to the bed head assembly 2, use the positioning flange 2.3.4 for axial and radial positioning, and adjust the support seat assembly 4 for auxiliary support.

[0203] 3. Rounding assembly: Move the rounding mechanism 2.2 to a suitable position, move the bed tail assembly 3, and make the end faces of the No. 1 and No. 2 shell segments to be welded contact. Start the rounding mechanism 2.2, and the motor 2.2.4 drives the support rod 2.2.7 to move axially, driving the sliding block 2.2.18 to open radially, and the copper lining 2.2.16 rounds the No. 1 and No. 2 shell segments at the same time. Adjust the clamping force of the lathe tail top assembly 3.7 to ensure that the gap of the circumferential weld is not greater than 0.1mm, and the step difference is not greater than 0.15mm.

[0204] 4. Welding operation: Argon gas is introduced through the pneumatic rotary joint 2.2.3 to provide gas protection during welding. The positioning flange 2.3 is started, and the motor 2.3.7 drives the positioning flange 2.3.4 to rotate, driving the shell segment to rotate, and the laser welding equipment starts ring welding.

[0205] 5. Repeat the cycle: After welding is completed, fold the support mechanism 2.2, move the foot assembly 3, and move the welded shell segment toward the foot of the bed to make room. Lift the No. 3 shell segment to the head assembly 2, and repeat the above steps until all shell segments are welded.

[0206] Through the above method, online continuous assembly and welding of multiple shell sections are realized, the work of repeated lifting and alignment is reduced, the assembly and welding efficiency is greatly improved, and the welding quality is guaranteed.

[0207] Example 3

[0208] The quick assembly and adjustment method for shell circumferential welding is as follows:

[0209] This equipment is used in conjunction with laser welding equipment to complete circumferential welding of multiple sections of metal shells.

[0210] Then, manually hoist the front head and the first cylinder to be assembled onto the equipment in sequence, clamp the front head on the chuck at the end of the bed, and make sure the run-out is qualified; then hoist the first section of the cylinder to the head of the bed and support it with a support seat.

[0211] Move the supporting mechanism to the appropriate position; move the tail end of the bed to press against the front head and cylinder.

[0212] The supporting mechanism performs the supporting operation and appropriately loosens or tightens the tail top so that the circumferential weld to be welded meets the process requirements.

[0213] Check whether the straightness of the assembled cylinder is qualified. If it is unqualified, re-round it and re-assemble it. If it is qualified, introduce argon gas for welding protection, and then the motor drives the cylinder to rotate and implement welding.

[0214] Loosen the rounding mechanism, move the tail end of the bed back, and assemble the next cylinder to be welded to the head end of the bed to complete the rounding, inspection, and laser ring welding.

[0215] Repeat this process to complete the laser welding of all the circumferential welds of the entire product. Hoist and transfer to the next process.

[0216] Step 1: First, the preliminary preparation work is to clean the shell to be welded, including the segments and heads and other components before welding; the shell is divided into several sections, each section is marked in sequence, marked as 1, 2, 3...N in the welding sequence, and hoisted to the assembly waiting area near the equipment.

[0217] Step 2: Hoist the 1# shell to the bed foot assembly 3, operate the three-jaw chuck 3.8 and the lathe tail top assembly 3.7 to complete the clamping and alignment of the thin-walled cylindrical shell; then hoist the 2# shell to the bed head assembly 2, use the positioning steps of the positioning flange 2.3.4 for axial and radial positioning, and adjust the support seat assembly 4 for auxiliary support.

[0218] Step 3: Move the support mechanism assembly 2.2 to a suitable position so that the groove in the middle of the copper lining 2.2.16 is aligned with the welding annular seam; move the tail assembly 3 so that the 1# shell is close to the 2# shell until the end faces of the two shells to be welded are in contact.

[0219] Step 4: The rounding mechanism assembly 2.2 starts to work, and the motor 2.2.4 drives it to open, and the copper lining 2.2.16 rounds the 1# shell and the 2# shell at the same time; while rounding, adjust the pressing force of the lathe tail top assembly 3.7 on the shell, and finally make the gap of the circumferential weld no more than 0.1mm and the step no more than 0.15mm; lock the lathe tail top assembly 3.7.

[0220] Step 5: Argon gas can be introduced through the pneumatic rotary joint 2.2.3 for gas protection during welding; release the electromagnetic clutch 2.2.5, retract the electromagnetic push rod 2.2.12, and then the positioning flange assembly 2.3 can start working; the motor 2 2.3.7 drives the positioning flange 2.3.4, so that the 1# shell and the 2# shell start to rotate; the laser welding equipment starts ring welding.

[0221] Step 6: After completing the welding of the 1# shell and the 2# shell, close the electromagnetic clutch 2.2.5, extend the electromagnetic push rod 2.2.12, and the motor 2.2.4 retracts the supporting mechanism, and the copper lining 2.2.16 is disengaged from the shell; move the foot assembly 3 to move the 1+2# shell toward the foot of the bed, and at the same time move the supporting mechanism assembly 2.2 toward the head of the bed, leaving space for the lifting of the 3# shell.

[0222] Steps 7 to N: Similar to steps 2 to 6, complete the installation and welding of shells 3 to N; hoist and transport.

[0223] The technical effects of the present invention are:

[0224] 1. The metal shell circumferential weld rapid adjustment device of the present invention can be used for welding of small-diameter and long-sized shells, and can quickly complete the rounding and alignment and compaction of thin-walled cylindrical shells, and the operation is simple.

[0225] 2. The inner support circle has high precision, which can make the gap at both ends of the annular seam small and the step difference small, ensuring high welding quality.

[0226] 3. The support circle and clamping force are adjustable, the pressure is maintained during welding, the stress after welding is uniform and the deformation is small, the molten pool collapses little, and there is no spatter residue in the shell cavity.

[0227] 4. Save inert shielding gas during welding.

[0228] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A shell circumferential welding rapid assembly and adjustment device, characterized in that: include: Bed assembly, including bed; A bed head assembly, used to fix one of the parts to be welded, is arranged at one end of the bed, and includes a positioning flange assembly for fixing one end of the above-mentioned part to be welded, and a supporting mechanism assembly that can extend from the other end of the above-mentioned part to be welded and is used to correct the welding position of the two parts to be welded; The bed foot assembly is arranged at the other end of the bed and is used to clamp one end of another part to be welded; The support seat assembly is arranged on the bed body and is used for supporting the parts to be welded clamped by the bed tail assembly.

2. The shell circumferential welding rapid assembly and adjustment equipment according to claim 1 is characterized in that: The headboard assembly also includes a headboard frame assembly fixed on the bed body; the positioning flange assembly is fixed on the headboard frame assembly; the support circle mechanism assembly is slidably connected to the headboard frame assembly and passes through the positioning flange assembly; a mounting base plate; a support circle bearing seat arranged on the mounting base plate; a sleeve shaft rotatably connected to the support circle bearing seat; a strut is coaxially arranged in the sleeve shaft; one end of the strut is connected to the strut driving mechanism, and the other end drives the support circle mechanism to open to correct the welding point of two parts to be welded; the strut driving mechanism drives the strut to move axially in the sleeve shaft.

3. The shell circumferential welding rapid assembly and adjustment equipment according to claim 2 is characterized in that: The support rod mechanism includes a support circular fixing flange fixed on the end of the sleeve shaft; a plurality of sliding blocks circumferentially distributed on the support circular fixing flange; a support head fixed on the support rod; an adjustment block fixed on the outer wall of the support head and adapted to the sliding block; a connecting rod hinged at both ends on the adjustment block and the sliding block respectively; the axial movement of the support rod drives the adjustment block to move, thereby driving the sliding block to move radially along the support circular fixing flange to correct the welding point of the two parts to be welded.

4. The shell circumferential welding rapid assembly and adjustment equipment according to claim 3 is characterized in that: Each sliding block is connected to a copper lining; the top of the copper lining is an arc surface and is provided with a groove; during welding, the weld is aligned with the groove; the support circle fixing flange and the end of the support rod are provided with sealing plates; the support rod is a hollow structure, one end of which is equipped with a pneumatic rotary joint, and the other end is provided with a radial through hole, and the radial through hole is located between the two sealing plates; argon gas is introduced into the space between the sealing plates through the radial through hole to form welding gas protection.

5. The shell circumferential welding rapid assembly and adjustment equipment according to claim 3 or 4, characterized in that: The supporting mechanism assembly also includes a support rod fixing bracket fixed on the mounting base plate and used to support the support rod; the support rod driving mechanism includes a transmission mechanism threadedly connected to the support rod; a driving machine that drives the transmission mechanism to rotate and realizes axial movement of the support rod through thread transmission; the transmission mechanism includes a driven wheel threadedly connected to the support rod, a driving wheel rotatably connected to the mounting base plate, and a supporting motor that drives the driving wheel; an electromagnetic clutch is provided between the supporting motor and the driving wheel.

6. The shell circumferential welding rapid assembly and adjustment equipment according to claim 3 or 4, characterized in that: The circle supporting mechanism assembly also includes a flange fixed on the sleeve shaft; and an electromagnetic push rod for locking and releasing the flange.

7. The shell circumferential welding rapid assembly and adjustment equipment according to claim 1 is characterized in that: The positioning flange assembly includes: a positioning flange bearing seat, a flange shaft rotatably connected to the positioning flange bearing seat; a positioning flange fixed at one end of the flange shaft for fixing one end of the part to be welded; a flange shaft driving mechanism for driving the flange shaft to rotate; the flange shaft driving mechanism includes: a large pulley fixed at one end of the flange shaft, a small pulley fixedly and rotatably connected to the positioning flange bearing seat, and a flange shaft motor that drives the small pulley to drive the large pulley to rotate.

8. The shell circumferential welding rapid assembly and adjustment equipment according to claim 1, characterized in that: The bed foot assembly comprises: a bed foot frame slidably connected to the bed body assembly; a three-claw chuck arranged on the bed foot frame for clamping one end of another part to be welded; and a bed foot drive mechanism for driving the bed foot frame to move axially along the supporting mechanism assembly.

9. The shell circumferential welding rapid assembly and adjustment equipment according to claim 1, characterized in that: The support assembly includes: a support frame slidably connected to the bed assembly; a lifting plate installed above the support frame through a linear bearing; a universal ball group fixed on the lifting plate for supporting the parts to be welded clamped by the foot assembly; a lifting screw assembly for adjusting the stroke of the lifting plate; the universal ball group is fixed to the two ends of the supporting linear slide rail through two relatively arranged adjustment frames, the supporting linear slide rail is fixed on the lifting plate, and the relative positions of the two adjustment frames are adjusted through the universal ball screw assembly to adapt to parts to be welded of different sizes.

10. A rapid assembly method for shell circumferential welding using the device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Clean the shell to be welded before welding and mark them by number according to the welding sequence; Lift the first shell to the end of the bed assembly and complete the installation and alignment; Lift the second shell to the bed head assembly for positioning; Move the support mechanism assembly to a suitable position so that the groove in the middle of the copper lining is aligned with the welding annular seam; The rounding mechanism assembly is started to round the shell, and the pressing force of the lathe tail assembly is adjusted to round the first shell and the second shell at the same time; Introduce argon gas for protection, start the positioning flange assembly to drive the shell to rotate, and perform laser welding; After welding is completed, the supporting mechanism is folded and the welding of the next set of shells is carried out.

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