CN110158081B - Laser strengthening on-line repairing construction method for steel converter - Google Patents
Laser strengthening on-line repairing construction method for steel converter Download PDFInfo
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- CN110158081B CN110158081B CN201910542890.1A CN201910542890A CN110158081B CN 110158081 B CN110158081 B CN 110158081B CN 201910542890 A CN201910542890 A CN 201910542890A CN 110158081 B CN110158081 B CN 110158081B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a steel-making converter laser strengthening on-line repair construction method, which is technically characterized in that machine tools with rough machining, finish machining and laser cladding functions are respectively arranged at the positions corresponding to trunnion ring square columns on two working platforms at a driving side and a driven side; carrying out rough machining, laser cladding and finish machining or manual finish grinding on each surfacing working surface by using the machine tool in sequence; and after the furnace shell and the backing ring are combined again, two upper supporting adjusting base plates are symmetrically inserted into the gap between the square hole and the end faces of the two sides of the square column, and the stop plates are respectively arranged above the two upper supporting adjusting base plates to finish the on-line repairing and installation. The invention obviously improves the repair precision and repair efficiency, and is safe and reliable.
Description
Technical Field
The invention relates to a steel-making converter repairing technology, in particular to a steel-making converter laser strengthening online repairing construction method which is suitable for repairing a joint of a converter backing ring and a converter shell.
Background
At present, the connection mode of the converter trunnion ring and the furnace shell used in steel plants usually adopts the mode that two square columns are respectively arranged at the upper parts of the trunnion rings in the directions of two trunnions of the trunnion ring, and a slot hole which is arranged up and down is respectively arranged in each square column. Two square holes are arranged on the apron board corresponding to the furnace shell. When the device is installed, the square hole of the furnace shell is aligned with the square column of the backing ring, the skirt board of the furnace shell is placed on the backing ring, and a wedge-shaped key is inserted into the long hole for wedging, so that the backing ring and the furnace shell are connected and combined into a whole. The tilting mechanism drives the lower support ring to rotate around the trunnion to make a fixed shaft, and drives the furnace shell to rotate, so that the molten steel tilting work is completed. As the converter runs in a severe working environment with high temperature and heavy load impact for a long time, the joint part of the backing ring and the furnace shell is seriously abraded to generate a gap over time, so that the converter cannot normally work. The existing method for repairing the joint of the backing ring and the furnace shell generally adopts build-up welding, but the repair surface formed by build-up welding has poor wear resistance and short maintenance life.
Laser cladding is a new surface modification technology. The method is characterized in that a selected coating material is placed on the surface of a cladded substrate in different material adding modes, is simultaneously melted with a thin layer on the surface of the substrate through laser irradiation, and forms a surface coating with extremely low dilution degree and metallurgical bonding with the substrate after rapid solidification, thereby obviously improving the wear-resisting, corrosion-resisting, heat-resisting and oxidation-resisting process method of the surface of a base layer, achieving the purpose of surface modification or restoration, meeting the requirements on the specific properties of the surface of the material and saving a large amount of precious elements. Compared with surfacing, spraying, electroplating and vapor deposition, the laser cladding technology has the characteristics of small dilution, fine structure, good combination of a coating and a matrix, more suitable cladding materials, large particle size and content change, high precision, high quality, high efficiency, non-contact property, clean and pollution-free parameter precision control, high automation and the like, and is an extremely important component in modern advanced technology manufacturing.
From the current application situation of laser cladding, the method is mainly applied to three aspects: firstly, surface modification of materials such as gas turbine blades, rollers, gears and the like; secondly, repairing the surface of a product, such as a rotor, a grinding tool and various shaft parts; and thirdly, rapid prototyping. If the laser cladding technology is applied to the repair of the joint of the backing ring and the furnace shell, the repair effect is certainly improved, the wear resistance of the repair surface is improved, and the service life is prolonged. The application is provided for how to reasonably apply the laser cladding technology to the occasions.
Disclosure of Invention
The invention aims to provide a steelmaking converter laser strengthening online repair construction method for solving the problems, which obviously improves the repair precision and repair efficiency and is safe and reliable.
The technical scheme of the invention is as follows:
a steel-making converter laser strengthening on-line repairing construction method is technically characterized by comprising the following steps:
step 1, respectively building a working platform at the positions above a driving side trunnion and a driven side trunnion of a converter trunnion ring, which are close to a joint part with a furnace shell, opening the joint part of the converter trunnion ring and the furnace shell and jacking the furnace shell to a set height;
step 7, lowering the furnace shell to enable a square hole of an apron plate of the furnace shell to be sleeved outside a square column of a trunnion ring, wherein the lower surface of the periphery of the square hole of the apron plate of the furnace shell is located on the upper surface of the trunnion ring at the periphery of the square column, a wedge-shaped key is inserted into a long hole of the square column, and two upper support adjusting base plates are symmetrically inserted into a gap between the square hole and the end surfaces at two sides of the square column, are inverted L-shaped and comprise a vertical plate and a horizontal limiting plate which are inserted into the gap, the contact surface of the vertical plate and the square column is a vertical plane, the contact surface of the vertical plate and the square hole is an inclined plane, the lower surface of the horizontal limiting plate is in contact with the upper surface of the;
and 8, respectively installing stop plates above the two upper supporting and adjusting base plates, wherein the number of the stop plates is four, every two stop plates correspond to one upper supporting and adjusting base plate in a group, and the stop plates are symmetrically fixed on the end faces of the square columns on the two sides of the wedge-shaped key to finish on-line repairing and installation.
According to the laser strengthening online repair construction method for the steelmaking converter, the machine tool comprises a base, an X-direction linear mechanism arranged below the base, a Y-direction linear mechanism arranged below the X-direction linear mechanism, a supporting arm arranged above the base, a milling cutter head arranged at the end part of the supporting arm, and a laser cladding device arranged on one side of the milling cutter head, wherein multiple groups of bolt holes corresponding to the milling cutter head are formed in the front end of the supporting arm, and the installation angle is changed by rotating the milling cutter head when the laser strengthening online repair construction method is used.
According to the laser strengthening online repair construction method of the steelmaking converter, the milling cutter bit is replaced by a connecting arm connected with the supporting arm according to the height and the position of the working surface, and the connecting arm is a straight arm or a crank arm.
According to the laser strengthening online repair construction method for the steel converter, when the milling cutter head mills the upper arc surface of the square column long hole, the milling cutter head is provided with the boring rod, the other side of the square column long hole is provided with the support, and the boring rod penetrates through the square column long hole and then is supported on the support.
The invention has the beneficial effects that:
1. the on-line repair construction method is adopted, a machine tool with multiple functions is utilized, flexible conversion of rough machining, laser cladding and finish machining is realized on the operation platform (the operation space is limited, the operation platform cannot be too large and is not suitable for simultaneous positioning and installation of multiple machining equipment and laser repair equipment, if the operation platform needs to be frequently installed according to the process steps of rough machining, laser repair and finish machining, and the machining equipment and the laser repair equipment are aligned, the repair precision is seriously influenced), the condition that the repair precision is low due to installation and alignment of the multiple equipment in the prior art is avoided, the operation is convenient, time and labor are saved, the repair efficiency is high, and the time for putting the converter into use again is shortened.
2. The combined structure of the upper support adjusting base plate and the stop plate is adopted, so that the service life of the converter which is put into use again is prolonged, and the joint part of the converter backing ring and the converter shell is prevented from being frequently maintained. The upper support adjusting base plate is used for tightly connecting the backing ring and the furnace shell so as to realize that the backing ring drives the furnace shell to rotate around the trunnion. One side of the vertical surface of the upper supporting and adjusting base plate is a plane, and the other side of the vertical surface of the upper supporting and adjusting base plate is an inclined surface, and the vertical surface of the upper supporting and adjusting base plate is in surface contact with the square column and the square hole, so that the conventional line contact mode (the requirement of bearing the large tilting moment of the converter is difficult to meet due to small contact area) is changed, and the influence on the normal work of the converter caused by the looseness of the backing ring and the. And 2 stop plates are additionally arranged on the upper parts of the upper supporting and adjusting backing plates, and the stop plates are fastened on the square columns through bolts so as to prevent the upper supporting and adjusting backing plates from loosening.
Drawings
FIG. 1 is a schematic view of an assembled structure of a backing ring and a furnace shell of a converter;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of a trunnion ring of the converter;
FIG. 4 is a schematic view of the relative mounting structure of the machine tool and the converter trunnion ring of the present invention;
FIG. 5 is a schematic view of a milling cutter head configuration of the machine tool of the present invention;
FIG. 6 is a schematic view of the invention milling the arc surface of the square column slot;
fig. 7 is a schematic structural view of a laser cladding device of the machine tool of the present invention;
FIG. 8 is a schematic view of the assembly structure of the repaired upper support adjusting shim plate and the repaired stop plate with the converter backing ring and the converter shell;
fig. 9 is a schematic structural view of the upper support trim panel.
In the figure: 1. the converter comprises a converter trunnion ring, 101, an upper surface of a trunnion ring at the periphery of a square column, 102, an end surface of the square column of the trunnion ring, 103, an upper arc surface of a long hole of the square column, 2, a furnace shell, 201, a lower surface of a square hole at the periphery of an apron plate of the furnace shell, 202, a side elevation of the square hole of the apron plate of the furnace shell, 203, an upper surface of the apron plate of the furnace shell, 3, a wedge-shaped key, 301, a lower surface of the wedge-shaped key, 4, an upper support adjusting shim plate, 401, an inclined surface, 402, a horizontal limiting plate, 403, a vertical plate, 404, a notch, 5, a stop plate, 6, a trunnion, 7 a working platform, 8, a Y-direction linear mechanism, 9, X-direction linear mechanism, 10, a support arm, 11, a.
Detailed Description
The laser strengthening online repair construction method for the steelmaking converter comprises the following steps:
step 1, respectively building a working platform 7 above a driving side trunnion 6 and a driven side trunnion 6 of a converter trunnion 1 near the joint with a furnace shell 2, opening the joint between the converter trunnion 1 and the furnace shell 2 and jacking the furnace shell to a set height.
And 2, manually polishing and derusting each surface to be repaired corresponding to the joint of the separated converter backing ring 1 and the separated converter shell 2, performing surface color inspection, recording by shooting, and calculating the repair amount.
And 3, selecting a working surface to be subjected to surfacing according to the flaw detection result, and performing surfacing by using a gas shielded welding machine, wherein the working surface comprises a furnace shell apron plate square hole periphery lower surface 201 on a driving side and a driven side, a trunnion ring square column end surface 102, a trunnion ring upper surface 101 on the periphery of a square column, a furnace shell apron plate square hole side vertical surface 202, a wedge-shaped key lower surface 301, a furnace shell apron plate upper surface 203 corresponding to the wedge-shaped key 3 and an upper arc surface 103 of a square column long hole, and the reference is made to fig. 1-3.
And 4, referring to fig. 4-7, respectively installing machine tools with rough machining, finish machining and laser cladding functions on the two working platforms 7 on the driving side and the driven side corresponding to the square column positions of the backing ring. In this embodiment, the machine tool includes a base 15, an X-direction linear mechanism 9 disposed below the base 15, a Y-direction linear mechanism 8 disposed below the X-direction linear mechanism 9, a support arm 10 disposed above the base 15, a milling cutter 11 disposed at an end of the support arm 10, and a laser cladding device 12 mounted on one side of the milling cutter 11 by a support. The front end of the supporting arm 10 is provided with a plurality of groups of bolt holes corresponding to the milling cutter head 11, when the laser cladding device is used, the bolt groups 13 are loosened, the installation angle is changed by rotating the milling cutter head 11, the milling operation surface and the laser cladding operation surface are further changed, and the angle of the laser cladding device 12 can also be changed and adjusted by the support.
And 5, sequentially carrying out rough machining and finish machining on each working surface by using a machine tool, or sequentially carrying out rough machining, laser cladding and finish machining.
In the embodiment, the lower surface 201 of the periphery of the square hole of the furnace shell apron plate on the driving side and the driven side is roughly milled and then finely milled; roughly milling the lower surface 301 of the wedge-shaped key, and then finely milling; the upper arc surface 103 of the square column long hole is roughly milled and then finely milled; the end face 102 of the trunnion ring square column, the upper surface 101 of the trunnion ring at the periphery of the square column, the side vertical face 202 of the furnace shell apron plate square hole and the upper surface 203 of the furnace shell apron plate corresponding to the wedge-shaped key 3 are respectively subjected to rough milling, laser cladding and finally finish milling or manual finish polishing.
And when the working surface is machined, the milling cutter head is replaced by the connecting arm connected with the supporting arm according to the height and the position of the working surface. The connecting arm portions of the milling cutter head 11 for connection to the support arm 10 include straight arms and crank arms, and are used instead depending on the application. The support arm 10 is shown as a straight arm in the figure, and when the support arm is replaced by a crank arm, the upper surface 203 of the furnace shell skirt plate corresponding to the wedge-shaped key 3 is mainly processed and clad.
In this embodiment, the milling cutter 11 is used for rough milling and finish milling, when milling the upper arc surface of the square column slot, the milling cutter is provided with the boring bar 14, the other side of the square column slot is provided with the bracket 16, and the boring bar 14 passes through the square column slot and then is supported on the bracket 16, so as to mill the square column slot (see fig. 6).
And 6, after repairing, detecting the repaired surface, performing surface coloring flaw detection, and shooting and recording.
Step 7, lowering the furnace shell 2, enabling a square hole of an apron board of the furnace shell to be sleeved outside a square column of a trunnion ring, enabling a lower surface 201 of the periphery of the square hole of the apron board of the furnace shell to be located on an upper surface 101 of the trunnion ring on the periphery of the square column, inserting a wedge-shaped key 3 into a long hole of the square column, symmetrically inserting two upper supporting adjusting base plates 4 into a gap between the square hole and end surfaces on two sides of the square column, enabling the upper supporting adjusting base plates 4 to be inverted L-shaped and to be composed of a vertical plate 403 and a horizontal limiting plate 402 which are inserted into the gap, enabling a contact surface of the vertical plate 403 and the square column to be a vertical plane, enabling a contact surface of the vertical plate 403 and the square hole to be an inclined plane 401, enabling a lower surface of the horizontal limiting plate 402 to be in contact with the.
And 8, respectively installing four stop plates 5 above the two upper supporting adjusting base plates 4, wherein every two of the four stop plates 5 correspond to one upper supporting adjusting base plate 4 in a group and are symmetrically fixed on the square column end faces on the two sides of the wedge-shaped key 3, and finishing online repair installation by referring to fig. 8.
Claims (3)
1. A steel-making converter laser strengthening on-line repairing construction method is characterized by comprising the following steps:
step 1, respectively building a working platform at the positions above a driving side trunnion and a driven side trunnion of a converter trunnion ring, which are close to a joint part with a furnace shell, opening the joint part of the converter trunnion ring and the furnace shell and jacking the furnace shell to a set height;
step 2, manually polishing and derusting each surface to be repaired corresponding to the joint of the separated converter backing ring and the converter shell, performing surface color inspection, recording by shooting, and calculating the repair amount;
step 3, selecting a working surface to be subjected to surfacing welding according to a flaw detection result, and performing surfacing welding by using a gas shielded welding machine, wherein the working surface comprises the lower surface of the periphery of a square hole of a furnace shell apron plate on a driving side and a driven side, the end surface of a trunnion ring square column, the upper surface of the trunnion ring on the periphery of the square column, the vertical surface of the side of the square hole of the furnace shell apron plate, the lower surface of a wedge-shaped key, the upper surface of the furnace shell apron plate corresponding to the wedge-shaped key and;
step 4, respectively installing machine tools with rough machining, finish machining and laser cladding functions on the two working platforms on the driving side and the driven side corresponding to the square column positions of the backing ring;
the machine tool comprises a base, an X-direction linear mechanism arranged below the base, a Y-direction linear mechanism arranged below the X-direction linear mechanism, a supporting arm arranged above the base, a milling cutter head arranged at the end part of the supporting arm and a laser cladding device arranged on one side of the milling cutter head, wherein the front end of the supporting arm is provided with a plurality of groups of bolt holes corresponding to the milling cutter head, and the mounting angle is changed by rotating the milling cutter head when the machine tool is used;
step 5, using a machine tool to perform rough machining and finish machining on each working surface in sequence, or performing rough machining, laser cladding and finish machining in sequence;
step 6, after the repair is finished, detecting the repaired surface, performing surface coloring flaw detection, and shooting and recording;
step 7, lowering the furnace shell to enable a square hole of an apron plate of the furnace shell to be sleeved outside a square column of a trunnion ring, wherein the lower surface of the periphery of the square hole of the apron plate of the furnace shell is located on the upper surface of the trunnion ring at the periphery of the square column, a wedge-shaped key is inserted into a long hole of the square column, and two upper support adjusting base plates are symmetrically inserted into a gap between the square hole and the end surfaces at two sides of the square column, are inverted L-shaped and comprise a vertical plate and a horizontal limiting plate which are inserted into the gap, the contact surface of the vertical plate and the square column is a vertical plane, the contact surface of the vertical plate and the square hole is an inclined plane, the lower surface of the horizontal limiting plate is in contact with the upper surface of the;
and 8, respectively installing stop plates above the two upper supporting and adjusting base plates, wherein the number of the stop plates is four, every two stop plates correspond to one upper supporting and adjusting base plate in a group, and the stop plates are symmetrically fixed on the end faces of the square columns on the two sides of the wedge-shaped key to finish on-line repairing and installation.
2. The steelmaking converter laser strengthening on-line repair construction method as claimed in claim 1, characterized in that: and replacing a connecting arm used for connecting the milling cutter head with the supporting arm according to the height and the position of the working surface, wherein the connecting arm is a straight arm or a crank arm.
3. The steelmaking converter laser strengthening on-line repair construction method as claimed in claim 1, characterized in that: when the milling cutter head mills the upper arc surface of the square column long hole, the milling cutter head is provided with a boring bar, the other side of the square column long hole is provided with a support, and the boring bar penetrates through the square column long hole and then is supported on the support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910542890.1A CN110158081B (en) | 2019-06-21 | 2019-06-21 | Laser strengthening on-line repairing construction method for steel converter |
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| CN201910542890.1A CN110158081B (en) | 2019-06-21 | 2019-06-21 | Laser strengthening on-line repairing construction method for steel converter |
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| CN110158081B true CN110158081B (en) | 2021-01-08 |
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| CN113369798A (en) * | 2021-06-29 | 2021-09-10 | 辽宁瀛寰科技有限公司 | Equipment surface repairing machine tool and repairing method |
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| JP5687825B2 (en) * | 2009-05-20 | 2015-03-25 | Ｊｆｅスチール株式会社 | Distortion suppression jig and steel wall repair method |
| CN103114169A (en) * | 2013-03-07 | 2013-05-22 | 北京瑞普同创科技发展有限公司 | Converter wet spray repair technique |
| CN104439877A (en) * | 2014-10-08 | 2015-03-25 | 甘肃酒钢集团西部重工股份有限公司 | Method for repairing converter supporting ring |
| CN104439881B (en) * | 2014-11-19 | 2017-02-08 | 首钢总公司 | Laser cladding and on-line machining repair method for roughing housing roller positioning groove |
| CN109759451A (en) * | 2019-01-28 | 2019-05-17 | 辽宁瀛寰科技有限公司 | A kind of realization mill housing quick, intelligent prosthetic device and application method online |
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