CN105499891B - A kind of welding method of 3 self-aligning spherical supports - Google Patents

A kind of welding method of 3 self-aligning spherical supports Download PDF

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Publication number
CN105499891B
CN105499891B CN201610082817.7A CN201610082817A CN105499891B CN 105499891 B CN105499891 B CN 105499891B CN 201610082817 A CN201610082817 A CN 201610082817A CN 105499891 B CN105499891 B CN 105499891B
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supported
point
point seat
welding
self
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CN105499891A (en
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张烨
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Anhui Masteel Engineering & Technology Group Co Ltd
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Anhui Masteel Engineering & Technology Group Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0417Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for spherical work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/12Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/235Preliminary treatment

Abstract

The invention discloses a kind of welding method of 3 self-aligning spherical supports, including supported at three point seat, dummy shaft pin and interim rigid support II, along 120 ° of backing ring circumferencial direction interval, form uniform 3 points, this 3 points center line both sides respectively symmetrically sets a supported at three point seat, dummy shaft pins position is between the two mutually symmetrical with supported at three point seats inner sides, in the outside of two mutually symmetrical with supported at three point seats, on one interim rigid support II of center line symmetrical setting.Supporting role of the both sides of supported at three point seat by interim rigid support II, dummy shaft pin is provided between supported at three point seat to keep desired installation dimension, interim rigid support II and dummy shaft pin one work, ensure the axial direction of supported at three point seat and plane keeping parallelism where backing ring, so that the side of supported at three point seat is vertical with plane where backing ring, so that the distance between two supported at three point seat inside upper parts and bottom are equal, to install and welding is prepared.

Description

A kind of welding method of 3 self-aligning spherical supports
Technical field
The present invention relates to field of metallurgical mechanical equipment, more particularly to a kind of welding method of 3 self-aligning spherical supports.
Background technology
The attachment means of converter shell and backing ring are one of key equipments in converter system, in pneumatic steelmaking operation not The converter weight of fully loaded molten steel is only undertaken, also to ensure that converter can smoothly vert operation, in the process, attachment means Bear the effect of the torques such as very big tension and compression, distortion, it is easy to tear phenomenon, therefore, the welding matter of attachment means occurs Amount and precision are most important.The attachment means of China's converter shell and backing ring mainly have two kinds at present, and one kind connects for supported at three point Mode is connect, another kind is suspension connected mode.
3 ball pivot coupling arrangements have following weak point:1) 3 ball pivot coupling arrangement lower trays are connected with body of heater Status requirement is higher, and lower portion of furnace body perforate precision is inadequate so that the installation between 3 ball pivot coupling arrangements, body of heater and backing rings Difficulty is big, and later period maintenance workload is big.2) 3 ball pivot coupling arrangement Horizontal limiting parts fine can not must meet that body of heater is heated Thermal deformation caused by expansion, harmomegathus of the furnace shell relative to backing ring is still limited in use.4) existing 3 ball pivot coupling arrangements exist Later stage is easily broken off using B-C post bolt.Therefore, 3 ball pivot coupling arrangements are being easily deformed or even torn using process, This also proposes higher requirement for the installation and welding of 3 ball pivot coupling arrangements, and the generally domestic technology used is mainly welded The method of post-processing, is exactly the axis hole of first preliminary working support base, and going up lathe again after erecting and welding carries out secondary method for finishing manufactured To ensure precision.Although this method is highly effective for installation accuracy guarantee, for conducting oneself with dignity tens tons or up to a hundred tons Handling is very inconvenient back and forth for large scale equipment, while also results in manufacturing schedule extension, increases the deficiency of cost of manufacture.
Chinese utility model patent, Authorization Notice No.:The U of CN 202945265, authorized announcement date:It is 2013.05.22 open A kind of 3 ball pivot coupling arrangements of converter modified for coupling between converter body and backing ring.Include and be arranged on converter Annular backing ring on ball pivot supporting arrangement, ball pivot supporting arrangement be circumferentially spaced 120 ° be provided with three, form uniform 3 points, Described ball pivot supporting arrangement includes pillar bolt and the ball-type seat being wrapped in outside pillar bolt, and its B-C post bolt is upper small Big pyramidal structure down, supporting inclination angle gap is left between pillar bolt and ball-type seat, the bottom of described backing ring is also equipped with Horizontal supporting device, is circumferentially symmetrically distributed with multiple, can be carried out in the case of uninterrupted blowing in any position of converter Thermal distortion compensation, block seat frame and locking block seat are installed above backing ring.This device can adapt to converter thermal deformation automatically, installation It is small with maintenance load, prevent branch male screw stress to be broken.It is disadvantageous in that:It the patent describe 3 sphere branch The planform of connection is held, but is not described for how the device is installed, if erecting and welding is bad, however it remains three The problem of point self-aligning spherical support attachment means are easily torn on backing ring, and service life is short, and fault rate is high, not only schedule delays, influence Production, and very big economic loss can be brought to enterprise.
Chinese invention patent, the B of Authorization Notice No. CN 101798613, authorized announcement date 2012.08.15, discloses one kind On-line quick change method of three-point spherical support of large-size converter, hydraulic synchronous jacking device is made first and by support crab bolt chi Very little making alignment pin, inspection platform is set up on backing ring and in stove, remove supporting plate bolt and nut and fix support with alignment pin Remaining bolt and nut is removed after plate, while removes slag-screening board and self-aligning spherical support bolt and nut, now using jacking apparatus by body of heater Jacking, removes and changes 3 self-aligning spherical supports on backing ring, 3 self-aligning spherical support bolt and nuts is fastened after falling body of heater after rise, in stove Supporting plate bolt and nut is installed on inspection platform, dress slag-screening board is returned, removes simple platform in inspection platform and stove, jacking apparatus goes out , complete 3 self-aligning spherical supports of converter and change.Its weak point:3 spheres described in the step of patent five and step 6 Supporting is removed and installation process, but is not described in detail, and 3 self-aligning spherical support erection sequences also do not limit, how to enter Row installation, still has certain difficulty of construction during the patent is actually performed, and may cause to extend the duration, increases Big installation cost.
The content of the invention
1. invention technical problems to be solved
The problem of for being easily deformed after 3 self-aligning spherical support welding of converter of prior art, the invention provides one kind three The welding method of point self-aligning spherical support.It will originally be needed secondary by setting servicing unit to realize the accurate control deflection of welding The process of processing and secondary assembling is reduced to once complete, and effectively reduces cost of manufacture and shortens manufacturing schedule.
2. technical scheme
To solve the above problems, technical scheme provided by the invention is:
A kind of 3 self-aligning spherical support installation auxiliary devices, including supported at three point seat, dummy shaft pin and interim rigid support II, edge 120 ° of backing ring circumferencial direction interval, uniform 3 points are formed, this 3 points center line both sides respectively symmetrically sets one three point branch Seat is supportted, dummy shaft pins position is between the two mutually symmetrical with supported at three point seats inner sides, in two mutually symmetrical with supported at three point seats Outside, on one interim rigid support II of center line symmetrical setting.The both sides of supported at three point seat are by interim rigid support II supporting role, dummy shaft pin is provided between supported at three point seat to keep desired installation dimension, interim rigid support II and vacation Pivot pin one works, it is ensured that the axial direction of supported at three point seat and plane keeping parallelism where backing ring so that the side of supported at three point seat With backing ring where plane it is vertical so that the distance between two supported at three point seat inside upper parts and bottom are equal, for installation and Welding is prepared.
Preferably, three-point support includes supported at three point seat, backing ring, converter flange, spherical pad and supported at three point bolt, and three Point support base is arranged on backing ring, and supported at three point seat top is provided with spherical pad, the axis direction of dummy shaft pin, supported at three point seat Axially and horizontal plane where backing ring is parallel to each other.So it is in order to ensure the size qualification of supported at three point seat.
Preferably, the section of supported at three point seat both sides is vertical with plane where backing ring.So it is to further ensure that The size qualification of supported at three point seat.
Preferably, dummy shaft pin is replaced using d-axis, supported at three point screw bolt passes converter flange and spherical pad are set On d-axis, wherein, d-axis is provided with the screw being engaged with supported at three point bolt.
Preferably, interim rigid support II one end is welded on backing ring, and the other end is welded on supported at three point seat lateral surface Top.
A kind of installation method of 3 self-aligning spherical supports, utilize a kind of above-described 3 self-aligning spherical supports installation auxiliary dress Put, its step is:
A, make process in a kind of above-described 3 self-aligning spherical support installation auxiliary devices supported at three point seat, it is interim just Property support II, supported at three point bolt and dummy shaft pin;
B, installing converter furnace shell and backing ring;
C, along 120 ° of backing ring circumferencial direction interval, uniform 3 points are formed, this 3 points of center is found out on backing ring bottom plate Line;
D, one supported at three point seat is symmetrically respectively installed on this 3 points center line both sides;
E, dummy shaft pin is arranged in the axial direction of supported at three point seat;
F, the size of each supported at three point seat on backing ring is checked, if size is errorless, dummy shaft pin is taken out, uses d-axis generation It is arranged on for dummy shaft pin in the axial direction of supported at three point seat;
G, supported at three point bolt is arranged on d-axis, spherical pad and pad are arranged on supported at three point bolt, 3 points Carrying bolt passes through converter flange, and nut is set on the top of supported at three point bolt;
H, supported at three point seat size is checked again for after all installing.The axially vertical degree of supported at three point seat, i.e., two Top distance and bottom distance between on the inside of supported at three point seat, it is qualified apart from equal expression supported at three point seat longitudinal size, pass through Supported at three point seat spacing is determined from the absolute altitude on backing ring, it is highly equal to represent that axis horizontal degree is qualified.
Preferably, spherical pad includes upper ball ring, upper spheric seating, lower peripheral surface pad and lower peripheral surface seat successively from top to bottom, Pad is located on spherical pad.
Preferably, the external diameter of the pore size in the axial direction of supported at three point seat and dummy shaft pin matches, d-axis and dummy shaft pin External diameter it is identical.
Preferably, using the groove of edge planer machining supported at three point seat in step A, groove type is U-shaped groove.
A kind of welding method of 3 self-aligning spherical supports, its step are:
The installation method of the first step, a kind of 3 self-aligning spherical supports in accordance with the above, after step E, 3 points of solid point Support base;
There is three-point mount supported at three point seat on second step, backing ring, it is symmetrically arranged for center line both sides on each point Respectively weld an interim rigid support II in the outside of supported at three point seat;
After 3rd step, interim rigid support II have been welded, the size of three pairs of supported at three point seats on backing ring bottom plate is carried out Check, the next step is carried out after qualified;
4th step, preheating, heating plate is laid on the back side of backing ring bottom plate and preheated;
5th step, the groove using edge planer machining supported at three point seat, groove type is U-shaped groove, welds at 3 points Support base;
6th step, all weld seams should carry out stress relief annealing immediately after being soldered, according to JB/T 4709-2000《Steel pressure Force container welding code》In the regulation of post weld heat treatment annealed;Post weld heat treatment should meet the regulation of design document, when During no standard, the post weld heat treatment of pipeline should meet national standard《Industrial Metal pipeline engineering job specfication》In GB50235 Pertinent regulations;The post weld heat treatment of equipment should meet existing professional standard《Pressure vessel welding code》JB/T4709 relevant rule It is fixed.
Annealing temperature is heated to 580 DEG C and is incubated 5 hours, according still further to per hour 40 with the 40 DEG C of slowly heatings that heat up per hour Until being reduced to room temperature, method for annealing is crawler type electrical heating annealing for DEG C slow cooling, and heating plate is respectively placed in backing ring bottom plate Inner side, i.e. supported at three point seat weld seam the back side, be covered on the weld seam of backing ring plate outer side supported at three point seat, heating plate it is outer Portion is covered with heat-preservation cotton, to be incubated.
7th step, remove interim rigid support II;
8th step, postwelding removing surface, postwelding polish face of weld, crator, spatter thing with electric angle grinder dry Only, polished again after the exceeded place's repair welding of undercut;
The d-axis of false bearing pin installation actual use is taken out after 9th step, weld seam detection are qualified, 3 self-aligning spherical supports of inspection Overall dimensions, inspection method are also by measuring absolute altitude, the distance between on the inside of supported at three point seat, size qualification, are handed over after paint Work.
Preferably, it is preheating in the 4th step after temperature is 150 DEG C~180 DEG C and carries out welding sequence again.
Preferably, welding method uses SMAW in the 5th step, is selected using SMAW welding condition Such as table 1.
The welding condition of table 1
Preferably, the selection of welding rod determines according to the material of converter shell in the 5th step, the converter shell from tensile strength Material is divided into:Low-alloy steel, high-alloy steel and non-ferrous metal, then wlding selection standard is, for turning for low-alloy steel material Stove furnace shell selection tensile strength is equal with converter shell material;For high-alloy steel and the converter shell of non-ferrous metal material, Select chemical composition equal with converter shell material.The wlding selection of the converter shell of 16MnR and Q345 materials is identical.
Preferably, root carries out back chipping using carbon arc air gouging in the 5th step, usesCarbon-point is removed, work Skill parameter see the table below 2, and angular grinding device is not suitable for the polishing of supported at three point seat because grinding efficiency is low, because supported at three point The thickness of seat is thicker, it has not been convenient to is polished using supported at three point seat.
The carbon arc air gouging technological parameter of table 2
Preferably, the welding sequence in the 5th step is:
1) the supported at three point seat synchronous welding on backing ring at 3 points;
2) the symmetrically arranged supported at three point seat weld joint on inner side in center line both sides each put is welded simultaneously by two welders;
3) when welding groove 1/3rd on the inside of supported at three point seat, back chipping is carried out using carbon arc air gouging in outside;
4) the outer side weld of supported at three point seat is welded;
5) when being welded to the half of the outer side weld of supported at three point seat, according to the deformation of the supported at three point seat of monitoring, i.e., The size of supported at three point seat is checked, judgement is to continue with welding outside or welding inner side;If supported at three point seat perpendicularity is now During to tilt laterally or keep not changing, then continue to weld weld joint on inner side;If now supported at three point seat is slopes inwardly, Then continue to weld outer side weld, the deflection of tracking and monitoring supported at three point seat in welding process, according to the deformation data of monitoring Adjustment welding sequence in time.
Preferably, at 150 DEG C~220 DEG C or so, welding slag between layers must be clear for interlayer temperature control during welding Except clean, and processing step is identical during every layer of welding, refers to the technological parameter of multi-pass welding and above-mentioned welding, is being welded to three Before point support base thickness half, the deflection of supported at three point seat is ceaselessly measured, to adjust welding sequence, eliminate welding During caused thermal stress, in welding process, if thermal stress does not eliminate, using process can slow release come out, so Device service life is shortened, and fault rate height is rested and reorganized again, it is necessary to stop work, to avoid this problem, it is necessary to should by heat in welding Power eliminates, with extension fixture service life.
Preferably, welding is taken 24 hours works continuously in shifts, and welding must not pause before completing, and ensures that whole weld seam begins Keeping warm mode is in eventually.
Preferably, discovery is further continued for applying after having the removing that must polish immediately when fusing bad or defect clean in welding process Weldering.
3. beneficial effect
Using technical scheme provided by the invention, compared with prior art, have the advantages that:
(1) present invention utilizes 3 self-aligning spherical support installation auxiliary devices, using axis hole is first finished, by welding accurate control Deflection processed, it will originally need secondary operation and the process of secondary assembling to be reduced to once complete, and effectively reduced cost of manufacture With shorten manufacturing schedule;
(2) in welding process of the present invention need not handling large scale equipment back and forth, easy for construction, manufacturing schedule is short, is fabricated to This is low;
(3) present invention controls 3 sphere branch by the deflection of 3 self-aligning spherical supports of control during welded and installed Hold in use, be unlikely to deform tear, often not change, reduce production cost;
(4) dummy shaft pin of the present invention is identical with d-axis size, for fixed dimension, if size is not right, can destroy taking-up, Readjust size;Prevent supported at three point seat from deforming, the effect rigidly fixed, aperture modification can be made;After erecting and welding is good, no Deformation unshifts;
(5) present invention is simple in construction, it is easy to accomplish, construction procedure simplifies, and shortens the duration.
Brief description of the drawings
Fig. 1 is position view of the attachment means of converter trunnion ring and converter shell in converter;
Fig. 2 is top view of the supported at three point seat on backing ring;
Fig. 3 is the sectional view of the attachment means of converter trunnion ring and converter shell;
Fig. 4 is the front view of supported at three point seat;
The weld groove of Fig. 5 supported at three point seats.
Label declaration in schematic diagram:
1st, supported at three point bolt;3rd, converter flange;4th, backing ring;5th, supported at three point seat;6th, dummy shaft pin;11st, nut;12nd, pad Piece;13rd, upper ball ring;14th, upper spheric seating;15th, lower peripheral surface pad;16th, lower peripheral surface seat;112nd, interim rigid support II.
Embodiment
To further appreciate that present disclosure, with reference to drawings and Examples, the present invention is described in detail.
Embodiment 1
With reference to Fig. 1-5, a kind of 3 self-aligning spherical support installation auxiliary devices, including supported at three point seat 5, dummy shaft pin 6 and interim Rigid support II112, along 120 ° of 4 circumferencial direction interval of backing ring, uniform 3 points are formed, this 3 points center line both sides is right respectively Claim to set a supported at three point seat 5, dummy shaft pin 6 is located between the two mutually symmetrical with inner sides of supported at three point seat 5, at two mutually The outside of symmetrical supported at three point seat 5, on one interim rigid support II112 of center line symmetrical setting, interim rigidity branch Support II112 one end is welded on backing ring 4, and the other end is welded on the top of the lateral surface of supported at three point seat 5.Supported at three point seat 5 Both sides are provided with dummy shaft pin between supported at three point seat 5 to keep desired installation by interim rigid support II112 supporting role Size, interim rigid support II112 and dummy shaft pin 6 one work, it is ensured that the axial direction of supported at three point seat 5 and the place plane of backing ring 4 Keeping parallelism so that the side of supported at three point seat 5 is vertical with the place plane of backing ring 4 so that on two inner sides of supported at three point seat 5 The distance between portion and bottom are equal, to install and welding is prepared.
Dummy shaft pin 6 is identical with d-axis size, for fixed dimension, if size is not right, can destroy taking-up, readjust Size;Prevent supported at three point seat 5 from deforming, the effect rigidly fixed, aperture modification can be made;After erecting and welding is good, it is indeformable not Displacement.
3 self-aligning spherical supports include supported at three point seat 5, backing ring 4, converter flange 3, spherical pad and supported at three point bolt 1, Supported at three point seat 5 is arranged on backing ring 4, and the top of supported at three point seat 5 is provided with spherical pad, the axis direction of dummy shaft pin 6, three point branch It is parallel to each other to support axial direction and the place horizontal plane of backing ring 4 of seat 5, is so in order to ensure the size qualification of supported at three point seat 5;3 points The section of the both sides of support base 5 is vertical with the place plane of backing ring 4.So it is to further ensure that the size of supported at three point seat 5 It is qualified.Dummy shaft pin 6 is replaced using d-axis, supported at three point bolt 1 sequentially passes through converter flange 3 and spherical pad is arranged on d-axis On, wherein, d-axis is provided with the screw being engaged with supported at three point bolt 1.
A kind of installation method of 3 self-aligning spherical supports, utilize a kind of above-described 3 self-aligning spherical supports installation auxiliary dress Put, its step is:
A, the supported at three point seat 5, interim processed in a kind of above-described 3 self-aligning spherical support installation auxiliary devices is made Rigid support II112, supported at three point bolt 1 and dummy shaft pin 6;Using the groove of edge planer machining supported at three point seat 5, groove Form is U-shaped groove.
B, installing converter furnace shell and backing ring 4;
C, along 120 ° of 4 circumferencial direction interval of backing ring, uniform 3 points is formed, are found out on the bottom plate of backing ring 4 in this 3 points Heart line;
D, one supported at three point seat 5 is symmetrically respectively installed on this 3 points center line both sides;
E, dummy shaft pin 6 is arranged in the axial direction of supported at three point seat 5;
F, the size of each supported at three point seat 5 on backing ring 4 is checked, if size is errorless, dummy shaft pin 6 is taken out, using straight Axle replaces dummy shaft pin 6 to be arranged in the axial direction of supported at three point seat 5;Pore size and dummy shaft pin 6 in the axial direction of supported at three point seat 5 External diameter match, d-axis is identical with the external diameter of dummy shaft pin 6.
G, supported at three point bolt 1 being arranged on d-axis, spherical pad and pad 12 are arranged on supported at three point bolt 1, Spherical pad includes upper ball ring 13, upper spheric seating 14, lower peripheral surface pad 15 and lower peripheral surface seat 16, pad 12 successively from top to bottom On spherical pad, supported at three point bolt 1 passes through converter flange 3, and nut is set on the top of supported at three point bolt 1 11;
H, the size of supported at three point seat 5 is checked again for after all installing.
A kind of welding method of 3 self-aligning spherical supports, its step are:
The installation method of the first step, a kind of 3 self-aligning spherical supports in accordance with the above, after step E, 3 points of solid point Support base 5;
There is three-point mount supported at three point seat 5 on second step, backing ring 4, be symmetrical arranged for center line both sides on each point Supported at three point seat 5 outside respectively welding one interim rigid support II112;
After 3rd step, interim rigid support II112 have been welded, to the size of three pairs of supported at three point seats 5 on the bottom plate of backing ring 4 Checked, the next step is carried out after qualified;
4th step, preheating, heating plate is laid on the back side of the bottom plate of backing ring 4 and preheated;Temperature is preheating to as 150 DEG C Welding sequence is carried out after~180 DEG C again.
5th step, the groove using edge planer machining supported at three point seat 5, groove type is U-shaped groove, welds at 3 points Support base 5;Welding method uses SMAW, using SMAW welding condition selection such as table 1.
The welding condition of table 1
The selection of welding rod determines that converter shell material is divided into from tensile strength according to the material of converter shell:Low-alloy Steel, high-alloy steel and non-ferrous metal, then wlding selection standard is to select tension strong for the converter shell of low-alloy steel material Degree is equal with converter shell material;For high-alloy steel and the converter shell of non-ferrous metal material, chemical composition is selected with turning Stove material is equal.
Material is that 16MnR correspondingly selects E5015 welding rods, and wlding has been both needed to quality certificate, and welding rod is dried using welding rod before weldering Dry case drying, 350~400 DEG C of drying temperature, is incubated 2 hours, the welding rod being baked is placed in 100 DEG C of heat-preservation cylinder, on-demand. The wlding selection of the converter shell of 16MnR and Q345 materials is identical.
Root carries out back chipping using carbon arc air gouging, usesCarbon-point is removed, and technological parameter see the table below 2, Angular grinding device is not suitable for the polishing of supported at three point seat because grinding efficiency is low, because the thickness of supported at three point seat is thicker, no Convenient use supported at three point seat is polished.
The carbon arc air gouging technological parameter of table 2
Welding sequence is:
1) synchronous welding of supported at three point seat 5 on backing ring 4 at 3 points;
2) the symmetrically arranged weld joint on inner side of supported at three point seat 5 in center line both sides each put is welded simultaneously by two welders;
3) when welding supported at three point 5 inner side groove 1/3rd of seat, back chipping is carried out using carbon arc air gouging in outside;
4) 5 outer side weld of supported at three point seat is welded;
5) when being welded to the half of 5 outer side weld of supported at three point seat, according to the deformation of the supported at three point seat 5 of monitoring, Judgement is to continue with welding outside or welding inner side;If the perpendicularity of supported at three point seat 5 now for inclination laterally or is kept not During change, then continue to weld weld joint on inner side;If now supported at three point seat 5 is slopes inwardly, continue to weld outer side weld, The deflection of tracking and monitoring supported at three point seat 5 in welding process, welding sequence is adjusted according to the deformation data of monitoring in time.
At 150 DEG C~220 DEG C, welding slag between layers must be removed totally, and often for interlayer temperature control during welding Processing step is identical during layer welding.Refer to the technological parameter of multi-pass welding and above-mentioned welding, it is thick being welded to supported at three point seat 5 Spend before half, the deflection of supported at three point seat 5 is ceaselessly measured, to adjust welding sequence, eliminate and produced in welding process Raw thermal stress.In welding process, if thermal stress does not eliminate, come out using process meeting slow release, this sampling device uses Lifetime, fault rate height are rested and reorganized again, it is necessary to stop work, to avoid this problem, it is necessary to eliminate thermal stress in welding, with Extension fixture service life.
Welding is taken 24 hours works continuously in shifts, and welding must not pause before completing, and ensure that whole weld seam is in all the time Keeping warm mode, find in welding process to be further continued for welding after having the removing that must polish immediately when fusing bad or defect clean.
6th step, all weld seams should carry out stress relief annealing immediately after being soldered, according to JB4709-2000《Steel pressure Container welding code》In the regulation of post weld heat treatment annealed;Post weld heat treatment should meet the regulation of design document, work as nothing During regulation, the post weld heat treatment of pipeline should meet national standard《Industrial Metal pipeline engineering job specfication》Having in GB50235 Close regulation;The post weld heat treatment of equipment should meet existing professional standard《Pressure vessel welding code》JB/T4709 relevant rule It is fixed.
Annealing temperature is heated to 580 DEG C and is incubated 5 hours, according still further to per hour 40 with the 40 DEG C of slowly heatings that heat up per hour Until being reduced to room temperature, method for annealing is crawler type electrical heating annealing for DEG C slow cooling, and heating plate is respectively placed in backing ring bottom plate Inner side, i.e. supported at three point seat weld seam the back side, be covered on the weld seam of backing ring plate outer side supported at three point seat, heating plate it is outer Portion is covered with heat-preservation cotton, to be incubated.
7th step, remove interim rigid support II112;
8th step, postwelding removing surface, postwelding polish face of weld, crator, spatter thing with electric angle grinder dry Only, polished again after the exceeded place's repair welding of undercut;
The d-axis of dummy shaft installation actual use is taken out after 9th step, weld seam detection are qualified, checks the sharp of 3 self-aligning spherical supports Body size, inspection method are also by measuring absolute altitude, the distance between on the inside of supported at three point seat, size qualification, are handed over after paint.
Embodiment 2
The present embodiment with embodiment 1, wherein, using 3 self-aligning spherical support installation auxiliary devices, using first finishing axis hole, By welding accurate control deflection, secondary operation and the process of secondary assembling will be originally needed to be reduced to once complete, effectively Reduce cost of manufacture and shorten manufacturing schedule.
3 self-aligning spherical support devices are the supported at three point seat that three supports for being mutually 120 ° are connected to the top of backing ring 4 with bearing pin On 5, can arbitrarily it be swung on bearing pin, its top is connected in the pin-and-hole of furnace shell flange by two pairs of spheric washers and uses nut Locking, there is that one group of height dimension is small, four wave washer of large carrying capacity under locking nut (nut 11), against two pairs of spheres, Carrying bolt can make any swing, shown in detailed structure view 1-3.
Using the groove of edge planer machining supported at three point seat, groove type is U-shaped groove, and groove size is that inner side is deep Spend for 89mm, root face 2mm, root arc radius 5mm, 30 ° of bevel angle, it is specific in detail as shown in Figure 5, angle a is in figure 30°.Wherein, interim rigid support II112 makes for 200mm channel-section steels, after interim rigid support II112 is installed and welded, The size of three pairs of supported at three point seats 5 on the bottom plate of backing ring 4 is checked again, next procedure can be carried out after qualified.Welding When be preheating to 150 DEG C after carry out welding sequence.Welding equipment is that SMAW uses ZX7-400 welding machines, and gouge uses ZD5- 1000 Multifunctional arc welding rectifiers.
Wlding selects:Material is that 16MnR correspondingly selects E5015 welding rods, and wlding has been both needed to quality certificate, and welding rod makes before weldering To be dried with Welding rod drying box, 350~400 DEG C of drying temperature, be incubated 2 hours, the welding rod being baked is placed in 100 DEG C of heat-preservation cylinder, On-demand, the welding rod to make moist is forbidden to use, and welding rod technical conditions should meet the regulation (GB/T5117- of existing national standards 1995).Interlayer temperature is controlled at 150 DEG C, and welding slag between layers must be removed totally, and processing step during every layer of welding It is identical.Welding is taken 24 hours works continuously in shifts, and welding must not pause before completing, and ensure that whole weld seam is in insulation all the time State.Find to be further continued for welding after having the removing that must polish immediately when fusing bad or other defect clean in welding process.
Technical requirements during welding:
(1) all weld seams must be welded by accredited welder.
(2) when welding, using being symmetrically welded.
(3) first on the inside of welding, in outside back chipping.The deflection of tracking and monitoring ear mount in welding process, according to the change of monitoring Shape amount data adjust welding sequence in time.
(4) at 150 DEG C~220 DEG C or so, welding slag between layers must be removed totally, and often for interlayer temperature control Processing step is identical during layer welding.
(5) welding is taken 24 hours works continuously in shifts, and welding must not pause before completing, and ensure that whole weld seam is located all the time In keeping warm mode.Find to be further continued for applying after having the removing that must polish immediately when fusing bad or other defect clean in welding process Weldering.
(6) welding should meet JB/T5000.3-2007《Weld general technical specifications》Regulation, size and angle grade are B levels, line position tolerance are F levels, and weldquality evaluation rank is BK levels.
Postwelding stress relief annealing, all weld seams should carry out stress relief annealing immediately after being soldered, and annealing temperature is with drawing Design requirement is defined, and method for annealing is annealed for electrical heating.Postwelding removing surface, postwelding is by all of face of weld and peripheral region Temporary support is removed, and crator, spatter thing etc. are polished totally, after giving repair welding for the exceeded place of undercut with electric angle grinder Polish again.Postwelding is examined, be divided into visual examination and it is internal detect, visual examination require face of weld be not allow for crackle, overlap, The presence of the weld defects such as stomata, slag inclusion;Inside detection, ultrasonic examination check criteria should perform JB/T4730- by drawing 2005, I levels are qualified;By actually detected after welding, 3 self-aligning spherical support d-axis installations are smooth, and overall dimensions are fully met Design requirement.
In welding process need not handling large scale equipment back and forth, easy for construction, manufacturing schedule is short, low manufacture cost.Pass through The deflection of 3 self-aligning spherical supports is controlled during welded and installed, controls 3 self-aligning spherical supports in use, it is not variable Shape is torn, and often not changed, be reduced production cost, simple in construction, it is easy to accomplish, construction procedure simplifies, and shortens the duration.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in accompanying drawing What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area Art personnel are enlightened by it, without departing from the spirit of the invention, without designing and the technical scheme for creativeness Similar frame mode and embodiment, protection scope of the present invention all should be belonged to.

Claims (9)

  1. A kind of 1. 3 self-aligning spherical support welding methods, it is characterised in that:
    The first step, a kind of installation method of 3 self-aligning spherical supports, its step are:
    A, the supported at three point seat (5) processed in a kind of 3 self-aligning spherical support installation auxiliary devices, interim rigid support II are made (112), supported at three point bolt (1) and dummy shaft pin (6);A kind of 3 self-aligning spherical support installation auxiliary devices, including supported at three point seat (5), dummy shaft pin (6) and interim rigid support II (112), along 120 ° of backing ring (4) circumferencial direction interval, uniform 3 points are formed, This 3 points center line both sides respectively symmetrically sets a supported at three point seat (5), and it is mutually symmetrical with that dummy shaft pin (6) is located at the two Between on the inside of supported at three point seat (5), in the outside of two mutually symmetrical with supported at three point seats (5), on center line symmetrical setting One interim rigid support II (112);
    B, installing converter furnace shell and backing ring (4);
    C, along 120 ° of backing ring (4) circumferencial direction interval, uniform 3 points are formed, are found out on backing ring (4) bottom plate in this 3 points Heart line;
    D, one supported at three point seat (5) is symmetrically respectively installed on this 3 points center line both sides;
    E, dummy shaft pin (6) is arranged in the axial direction of supported at three point seat (5);Solid point supported at three point seat (5);
    There is three-point mount supported at three point seat (5) on second step, backing ring (4), be symmetrical arranged for center line both sides on each point Supported at three point seat (5) outside respectively welding one interim rigid support II (112);
    After 3rd step, interim rigid support II (112) have been welded, to the chi of three pairs of supported at three point seats (5) on backing ring (4) bottom plate Little progress row inspection, the next step is carried out after qualified;
    4th step, preheating, heating plate is laid on the back side of backing ring (4) bottom plate and preheated;
    5th step, the groove using edge planer machining supported at three point seat (5), groove type is U-shaped groove, welds three point branch Support seat (5);
    6th step, all weld seams should carry out stress relief annealing immediately after being soldered, according to JB/T 4709-2000《Steel pressure holds Device welding code》In the regulation of post weld heat treatment annealed;
    7th step, remove interim rigid support II (112);
    Face of weld, crator, spatter thing are polished totally, stung by the 8th step, postwelding removing surface, postwelding with electric angle grinder Polished again after the exceeded place's repair welding in side;
    The d-axis of dummy shaft pin (6) installation actual use is taken out after 9th step, weld seam detection are qualified, checks 3 self-aligning spherical support entirety After size, handed over after paint.
  2. 2. a kind of 3 self-aligning spherical support welding methods according to claim 1, it is characterised in that be preheating to temperature in the 4th step Spend to carry out welding sequence again after 150 DEG C~180 DEG C.
  3. A kind of 3. 3 self-aligning spherical support welding methods according to claim 1, it is characterised in that:Welding in 5th step is suitable Sequence is:
    1) supported at three point seat (5) synchronous welding at upper 3 point of backing ring (4);
    2) symmetrically arranged supported at three point seat (5) weld joint on inner side in center line both sides each put is welded simultaneously by two welders;
    3) when welding groove 1/3rd on the inside of supported at three point seat (5), back chipping is carried out using carbon arc air gouging in outside;
    4) supported at three point seat (5) outer side weld is welded;
    5) when being welded to the half of supported at three point seat (5) outer side weld, according to the deformation of the supported at three point seat (5) of monitoring, Judgement is to continue with welding outside or welding inner side;Supported at three point seat if (5) perpendicularity now for inclination laterally or is kept When not changing, then continue to weld weld joint on inner side;If now supported at three point seat (5) is slopes inwardly, continue welding outside Weld seam, the deflection of tracking and monitoring supported at three point seat (5), welding is adjusted according to the deformation data of monitoring in time in welding process Sequentially.
  4. 4. a kind of 3 self-aligning spherical support welding methods according to claim 1, it is characterised in that three-point support includes at 3 points Support base (5), backing ring (4), converter flange (3), spherical pad and supported at three point bolt (1), supported at three point seat (5) are arranged on support Enclose on (4), supported at three point seat (5) top is provided with spherical pad, the axis direction of dummy shaft pin (6), the axial direction of supported at three point seat (5) It is parallel to each other with horizontal plane where backing ring (4).
  5. 5. 3 self-aligning spherical support welding methods of one kind according to claim 1 or 4, it is characterised in that supported at three point seat (5) The section of both sides is vertical with plane where backing ring (4).
  6. 6. a kind of 3 self-aligning spherical support welding methods according to claim 5, it is characterised in that replace dummy shaft using d-axis To sell (6), supported at three point bolt (1) sequentially passes through converter flange (3) and spherical pad is arranged on d-axis, wherein, set on d-axis There is the screw being engaged with supported at three point bolt (1).
  7. A kind of 7. 3 self-aligning spherical support welding methods according to claim 5, it is characterised in that interim rigid support II (112) one end is welded on backing ring (4), and the other end is welded on the top of supported at three point seat (5) lateral surface.
  8. A kind of 8. 3 self-aligning spherical support welding methods according to claim 5, it is characterised in that the described penalty kick of one kind three The installation method of surface bearing, utilize 3 self-aligning spherical support installation auxiliary devices of one kind described in step A, in addition to following step Suddenly:
    E, dummy shaft pin (6) is arranged in the axial direction of supported at three point seat (5);
    F, the size of each supported at three point seat (5) on backing ring (4) is checked, if size is errorless, dummy shaft pin (6) is taken out, uses D-axis replaces dummy shaft pin (6) to be arranged in the axial direction of supported at three point seat (5);
    G, supported at three point bolt (1) is arranged on d-axis, spherical pad and pad (12) are arranged on supported at three point bolt (1) On, supported at three point bolt (1) passes through converter flange (3), and nut (11) is set on the top of supported at three point bolt (1);
    H, supported at three point seat (5) size is checked again for after all installing.
  9. 9. a kind of 3 self-aligning spherical support welding methods according to claim 8, it is characterised in that using plane side in step A The groove of machine machining supported at three point seat (5), groove type is U-shaped groove.
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US10654127B2 (en) * 2017-10-24 2020-05-19 Tong Li Engraving system and method of operation thereof
CN108504817B (en) * 2018-04-26 2020-01-03 上海宝冶集团有限公司 Converter hanging structure and disassembling and assembling method thereof
CN110480231A (en) * 2018-05-15 2019-11-22 中冶宝钢技术服务有限公司 Converter support base combined type positioning tool and its application method

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CN101798613A (en) * 2009-02-06 2010-08-11 上海宝冶建设有限公司 On-line quick change method of three-point spherical support of large-size converter
CN102485919A (en) * 2010-12-06 2012-06-06 中冶天工集团有限公司 Method for installing dummy shaft of converter connecting rod suspension system
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