CN114393277A - Welding process for overlaying wear-resistant layer of U-shaped grinding plate of pushing ram - Google Patents
Welding process for overlaying wear-resistant layer of U-shaped grinding plate of pushing ram Download PDFInfo
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- CN114393277A CN114393277A CN202210105368.9A CN202210105368A CN114393277A CN 114393277 A CN114393277 A CN 114393277A CN 202210105368 A CN202210105368 A CN 202210105368A CN 114393277 A CN114393277 A CN 114393277A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a welding process for overlaying a wear-resistant layer on a U-shaped grinding plate of a pushing ram, which is implemented through a simple auxiliary tool, wherein the auxiliary tool comprises a structural member portal, and the structural member portal comprises a portal-shaped support and side frames symmetrically arranged on two sides of the portal-shaped support; a plurality of pressing plate mounting grooves are formed in the upper surface of the door-shaped support, and adjusting tool mounting grooves are correspondingly formed between the side surface of the door-shaped support and the inner side of the side frame respectively; a pair of L-shaped anti-deformation pressing plates are movably arranged on the front side and the rear side in each pressing plate mounting groove respectively, and each L-shaped anti-deformation pressing plate is provided with a locking screw rod; and adjusting and fixing structural part tools are respectively arranged on the front side and the rear side in the two corresponding adjusting tool mounting grooves on each side of the portal support. The invention has the advantages of low investment cost, convenient field operation and maintenance and short repair time, and the welded and repaired bottom surface of the U-shaped grinding plate can meet the requirement of periodic operation and use.
Description
Technical Field
The invention belongs to the technical field of welding, and relates to a welding process for overlaying a wear-resistant layer on a U-shaped grinding plate of a pushing ram.
Background
The four main locomotives of the coke oven mainly comprise a coal charging car, a coke pushing car, a coke guide car and a coke quenching car. The coke pusher is an important device for coke oven production and mainly comprises a steel structure, a walking device, a door taking device, a coal leveling device, a coke pushing device and the like. The coke pushing device mainly comprises a coke pushing transmission device (a motor, a speed reducer, a band-type brake and a coke pushing driving gear) and a coke pushing rod device (a coke pushing rod head, a coke pushing rod, various carrier rollers, a coke pushing rod triangular support and a slide seat). The coke pushing rod is mainly used for pushing out mature coke in a coke oven carbonization chamber, guiding the mature coke into a coke guide grid of the coke guide and then dropping the mature coke into a coke quenching car for quenching. The coke pushing rod is in the advancing process, the gravity center continuously moves forwards, the triangular support and the sliding seat are arranged at the front end of the coke pushing rod to play a supporting role, the sliding seat is flexibly rotated on the rotating shaft and is usually 30-50mm higher than bricks at the bottom of the carbonization chamber (convenient to enter the carbonization chamber), the coke pushing rod can smoothly enter the carbonization chamber along with the advance of the coke pushing rod, the lower part of the sliding seat is provided with a U-shaped grinding plate, such as a U-shaped grinding plate 2 shown in figure 1, two ends of the U-shaped grinding plate are slightly raised to form arc plates 22 with certain arcs and are convenient to move back and forth, after the coke pushing rod enters the carbonization chamber, the supporting and stabilizing roles are mainly realized by a coke pushing rod carrier roller and the triangular support sliding seat, namely, the grinding plate under the sliding seat continuously rubs with coke on the bottom bricks of the carbonization chamber of the coke oven and the upper surfaces of the bottom bricks in the production process, meanwhile, the temperature in the carbonization chamber reaches 1000 ℃, because the U-shaped grinding plate is conveniently manufactured, a 16Mn steel plate with the required strength is selected, however, other performance indexes are insufficient in the actual use process under the field working conditions, so that the bottom surface of the U-shaped grinding plate is easily abraded, and the U-shaped grinding plate needs to be replaced frequently at irregular time, so that the production rhythm is influenced; if the wear-resisting plate meeting the hardness requirement is selected to be manufactured, the cost is high, the radian of the U-shaped wear-resisting plate is difficult to manufacture, and the wear-resisting plate cannot be matched with equipment for mounting the whole structural part.
Disclosure of Invention
Aiming at the problems that the bottom surface of a U-shaped grinding plate is easy to wear, needs to be replaced frequently in an irregular time and influences the production rhythm in the background technology, the welding device and the welding process for overlaying the wear-resistant layer of the coke pushing rod U-shaped grinding plate are implemented, so that the investment cost is low, the field operation and maintenance are convenient, the repair time is short, and the welded and repaired bottom surface of the U-shaped grinding plate can meet the requirement of periodic operation and use.
The technical scheme for solving the technical problem of the invention is as follows:
the invention relates to a welding process for overlaying a wear-resistant layer on a U-shaped grinding plate of a pushing ram, wherein radian plates are respectively arranged on two sides of the U-shaped grinding plate, the U-shaped grinding plate is welded through an auxiliary tool, and an even number of overlaying wear-resistant surfaces are welded on the surface of the U-shaped grinding plate; the auxiliary tool comprises a structural member portal, the structural member portal comprises a portal-shaped support and side frames symmetrically arranged on two sides of the portal-shaped support, a plurality of pressure plate mounting grooves in an inverted T shape are formed in the upper surface of the portal-shaped support, and adjusting tool mounting grooves are correspondingly formed between the two side surfaces of the portal-shaped support and the inner sides of the side frames respectively; a pair of L-shaped anti-deformation pressing plates are movably arranged on the front side and the rear side in each pressing plate mounting groove respectively, the lower parts of the L-shaped anti-deformation pressing plates are in an inverted T shape and are embedded in the pressing plate mounting grooves, the upper parts of the L-shaped anti-deformation pressing plates are in an L shape and are provided with threaded holes, and locking screws are arranged in the threaded holes; adjusting and fixing structural part tools are respectively arranged at the front side and the rear side in two corresponding adjusting tool installation grooves on each side of the portal bracket, each adjusting and fixing structural part tool comprises a fixing block with two ends matched with the adjusting tool installation grooves, and a concave adjusting block is rotatably arranged on the inner side of each fixing block; the welding process comprises the following steps:
step one, fixing a U-shaped grinding plate;
horizontally placing the U-shaped grinding plate on the door-shaped support, respectively inserting the radian plates on the two sides of the U-shaped grinding plate into the adjusting blocks of the adjusting and fixing structural part tools on the two sides of the door-shaped support, adjusting the positions of the radian plates, respectively installing each pair of L-shaped anti-deformation pressing plates in the pressing plate installing grooves on the two sides of the U-shaped grinding plate, and then locking the U-shaped grinding plate through a locking screw rod, so that the welding of each surfacing wear-resistant surface can be carried out;
step two, preparing before welding;
2.1), welding equipment: the direct current welding machine is used for combining digital control inversion type manual shielded metal arc welding and argon arc welding, the welding material of a bottoming transition layer adopts an H1Cr18Ni9Ti welding wire with the diameter of 2.5mm, the welding material of a surface wear-resistant alloy layer adopts a CAG-CO21 welding wire or a D707 welding wire with the diameter of 4.0mm, and the argon purity is more than or equal to 99.999 percent;
2.2), heating device: an electrical heating belt;
2.3), auxiliary facilities: angle grinder, file, hammer, flat shovel, mask, sample plate, thermodetector, magnifier, and heat insulation cotton;
2.4), weldment material: 16Mn of a body, transition layer stainless steel H1Cr18Ni9Ti, and outer layer wear-resistant alloy steel CAG-CO21 or D707;
2.5), the surfacing welding requirement before welding: cleaning the worn surface by a manual angle grinder to remove rust, grease and moisture, and preheating by using an electric heating belt;
2.6), welding position: horizontal overlaying;
2.7), welding requirements: all welding layers must be free of any welding defects and fused to the base material;
2.8), welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
step two, welding implementation;
2.1) preheating the positions of the to-be-welded surfacing wear-resistant surfaces on the surface of the U-shaped grinding plate to 150 ℃ through an electric heating belt, simultaneously carrying out symmetrical welding of a bottoming transition layer on the two surfacing wear-resistant surfaces by utilizing two welding devices, wherein the welding sequence of the first layer of bottoming is transverse welding, adopting a linear strip conveying method, strictly controlling the thickness of a welding layer to be 2-4 mm, simultaneously ensuring the connection fusion between welding beads and the fusion of a bottom layer, flattening the surface of a welding seam by adopting a manual angle grinder after the welding of the whole bottom layer of each surfacing wear-resistant surface position is finished, grinding and preserving heat by adopting a heat preservation cotton bag after detecting that no defect exists, then carrying out symmetrical welding on every two other to-be-welded surfacing wear-resistant surfaces in sequence by using the same welding process until the welding of the bottoming transition layers at all surfacing wear-resistant surface positions is finished;
2.2) after all the surfacing transition layers are welded and determined to be free of defects, symmetrically surfacing the surfacing layers on the surfacing transition layers at the positions of two surfacing wear-resistant surfaces by using two welding devices, wherein the welding sequence is longitudinal welding, the welding method is crescent, the thickness is controlled to be 3-5 mm, mutual welding bead fusion connection and fusion of the bottom layers are ensured, after the welding is completed, the use size is manually ground and no defect is determined, symmetrically surfacing is sequentially performed on the surfaces of the surfacing transition layers at every two other surfacing wear-resistant surface positions in the same mode until the welding of the surfaces of the surfacing transition layers at all the positions of the surfacing wear-resistant surfaces is completed;
2.3) ensuring that all the surfacing wear-resistant surfaces have no welding defects, carrying out smooth grinding on the surfaces of welding seams by using a manual angle grinder to the using size, carrying out postweld heat treatment by using an electric heating belt again, integrally heating each surfacing wear-resistant surface by 300-350 ℃, ensuring that the temperature rises uniformly and is kept constant for 2 hours, then gradually cooling to room temperature, and recovering the using tolerance size for use after detecting and detecting defects to confirm that no defects exist, and delivering for use.
Furthermore, when the bottom transition layer is welded, H1Cr18Ni9Ti welding wires with the diameter of phi 2.5mm are adopted, the welding current is 80-140A, preferably 90-110A, the arc voltage is 24 +/-1V, and the welding speed is 13 +/-1 cm/min; when the surface overlaying layer is welded, a CAG-CO21 welding wire with the diameter of 4.0mm is adopted, the welding current is 170-190A, preferably 170-180A, the arc voltage is 26 +/-1V, and the welding speed is 12 +/-1 cm/min.
Further, in the postweld heat treatment, the temperature was increased at a rate of 50 ℃/h.
Compared with the prior art, the welding process for overlaying the wear-resistant layer on the U-shaped grinding plate of the coke pushing rod is implemented through a simple auxiliary tool, is safe and easy to operate, has stable welding quality and low investment cost, meets the actual field requirements, has high working efficiency, greatly reduces the maintenance cost, reduces the shutdown loss, provides guarantee for reasonable production set, and simultaneously provides a scientific reference basis for welding and repairing other large workpieces by the wear surface welding and repairing process of the U-shaped grinding plate part of the large coke pushing rod.
Drawings
FIG. 1 is a schematic structural view of a U-shaped grinding plate according to the present invention;
FIG. 2 is a schematic structural view of an auxiliary tool according to the present invention;
FIG. 3 is a schematic view of a structural portal of the present invention;
FIG. 4 is an exploded view of the auxiliary tool of the present invention;
FIG. 5 is a schematic view of a weld of a hardfacing of the present invention;
in the figure: 1. a structural member portal; 11. a gantry support; 12. a side frame; 13. a pressure plate mounting groove; 14. adjusting the tool mounting groove; 2. u-shaped grinding plates; 21. surfacing a wear-resistant surface; 22. a radian plate; 3. an L-shaped anti-deformation pressing plate; 31. a threaded hole; 4. locking the screw rod; 5. adjusting and fixing the structural part tool; 51. a fixed block; 52. an adjusting block; .
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships are changed accordingly.
As shown in fig. 1 to 5, in the welding process for overlaying a wear-resistant layer on a U-shaped grinding plate of a coke pushing ram according to the present invention, arc plates 22 are respectively disposed on both sides of the U-shaped grinding plate 2, the U-shaped grinding plate 2 is welded by an auxiliary tool, an even number of overlaying wear-resistant surfaces 21 are formed on the surface of the U-shaped grinding plate 2, and in this example, 4 overlaying wear-resistant surfaces 21 are welded on the surface of the U-shaped grinding plate 2 as an example; the auxiliary tool comprises a structural member portal 1, the structural member portal 1 comprises a portal-shaped support 11 and side frames 12 symmetrically arranged on two sides of the portal-shaped support 11, the upper surface of the portal-shaped support 11 is provided with 3 pressure plate installation grooves 13 in an inverted T shape, and the position of each pressure plate installation groove 13 is determined according to the positions of 4 surfacing wear-resistant surfaces 21 to be welded on the surface of the U-shaped grinding plate 2; adjusting tool mounting grooves 14 are correspondingly formed between the two side faces of the door-shaped support 11 and the inner side of the side frame 12 respectively; a pair of L-shaped anti-deformation pressing plates 3 are movably arranged at the front side and the rear side in each pressing plate mounting groove 13 respectively, the lower parts of the L-shaped anti-deformation pressing plates 3 are in an inverted T shape and are embedded in the pressing plate mounting grooves 13, the upper parts of the L-shaped anti-deformation pressing plates 3 are in an L shape and are provided with threaded holes 31, and locking screws 4 are arranged in the threaded holes 31; adjusting and fixing structural part tools 5 are respectively installed on the front side and the rear side in two corresponding adjusting tool installation grooves 14 on each side of the portal-shaped support 11, each adjusting and fixing structural part tool 5 comprises a fixing block 51, two ends of each fixing block are matched with the adjusting tool installation grooves 14, and a concave adjusting block 52 is rotatably arranged on the inner side of each fixing block 51; the welding process comprises the following steps:
step one, fixing a U-shaped grinding plate;
horizontally placing the U-shaped grinding plate 2 on the door-shaped support 11, respectively inserting the arc plates 22 at two sides of the U-shaped grinding plate 2 into the adjusting blocks 52 of the adjusting and fixing structural part tools 5 at two sides of the door-shaped support 11, adjusting the positions, respectively installing each pair of L-shaped anti-deformation pressing plates 3 in the pressing plate installing grooves 13 at two sides of the U-shaped grinding plate 2, then locking the U-shaped grinding plate 2 through the locking screw rods 4, namely, completing the rigid fixation of the U-shaped grinding plate 2, and then welding the surfacing wear-resistant surfaces 21;
step two, preparing before welding;
2.1, welding equipment: the model is HT400D or HT500D, the numerical control inversion type manual shielded metal arc welding and argon arc welding are combined by using a direct current welding machine, the welding material of a bottoming transition layer adopts an H1Cr18Ni9Ti welding wire with the diameter of 2.5mm, the welding material of a surface wear-resistant alloy layer adopts a CAG-CO21 welding wire or a D707 welding wire with the diameter of 4.0mm, and the argon purity is more than or equal to 99.999 percent;
2.2, heating device: an electrical heating belt;
2.3, auxiliary facilities: angle grinder, file, hammer, flat shovel, mask, sample plate, thermodetector, magnifier, and heat insulation cotton;
2.4, weldment material: 16Mn of a body, transition layer stainless steel H1Cr18Ni9Ti, and outer layer wear-resisting alloy steel CAG-CO21 or D707;
2.5, surfacing welding requirement before welding: cleaning the worn surface by a manual angle grinder to remove rust, grease and moisture, and preheating to 150 ℃ by using an electric heating belt;
2.6, welding position: horizontal overlaying;
2.7, welding requirement: all welding layers must be free of any welding defects and fused to the base material;
2.8, welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
welding process parameters
Step two, welding implementation;
2.1, preheating the positions of the to-be-welded surfacing wear-resistant surfaces 21 on the surface of the U-shaped grinding plate 2 to 150 ℃ through an electric heating belt, simultaneously carrying out symmetrical welding of a priming transition layer at the positions of the two surfacing wear-resistant surfaces 21 by using two welding devices, for example, simultaneously and symmetrically welding the positions of the 2 nd surfacing wear-resistant surface 21 and the 4 th surfacing wear-resistant surface 21, as shown in fig. 5, the welding sequence of the priming first layer is transverse welding, a linear strip conveying method is adopted, H1Cr18Ni9Ti is selected as a priming transition layer welding wire, on one hand, the priming transition layer welding wire is fused with a base material, on the other hand, cracks are not generated between layers, on the other hand, the priming transition is fused with a surfacing surface layer wear-resistant alloy material, various welding defects and using quality caused by the fact that the wear-resistant alloy material directly contacts the base material are avoided, but the thickness of the welding layer is strictly controlled to be 2-4 mm, and meanwhile, the welding current is controlled to be 90-110A, and connection between the fusion welding beads and fusion of the bottom layer are ensured, after the welding of the whole bottom layer at each position of the surfacing wear-resistant surface 21 is finished, grinding and flattening the surface of a welding seam by using a manual angle grinder, detecting no defect through visual inspection or a magnifier, bundling and insulating by using insulating cotton, and then finishing the symmetrical welding of the positions of the other 1 st and 3 rd surfacing wear-resistant surfaces 21 to be welded by using the same welding process; in the process of welding the priming transition layer, if a weld defect is found, after local clearing by a hand angle grinder, repair welding is carried out by the same priming welding process;
2.2, after the bottoming transition layer is completely welded and no defect is confirmed, welding the surfacing welding layer on the bottoming transition layer at two (such as the 2 nd and the 3 rd) surfacing wear-resistant surfaces 21 by using two welding devices, wherein the welding material is CAG-CO21 wear-resistant alloy material or D707 welding rod, as shown in FIG. 5, the welding sequence of the surface overlay welding layer is designed as longitudinal welding for better fusion with the bottom layer and reducing the moving resistance of the welding line in the actual use process, the welding method is crescent, the thickness is strictly controlled to be 3-5 mm for ensuring the welding quality of the surface overlay welding layer, meanwhile, the welding current is controlled to be 170-180A to ensure the mutual welding bead fusion connection and the fusion of the bottom layer, after the welding is finished, after manually grinding to the use size and confirming no defects, finishing the surface overlaying of the priming transition layer at the positions of the other two (1 st and 4 th) overlaying wear-resistant surfaces 21 in the same way;
and 2.3, after ensuring that all the surfacing wear-resistant surfaces 21 have no welding defects and carrying out smooth grinding on the surfaces of welding seams to the using size by using a manual angle grinder, carrying out postweld heat treatment by using an electric heating belt again, integrally heating each surfacing wear-resistant surface 21 to 300-350 ℃, ensuring that the temperature uniformly rises at 50 ℃/h and is kept constant for 2 hours, then gradually cooling to room temperature, and recovering the using tolerance size after detecting and detecting defects, delivering for use, and periodically operating to achieve the mechanical performance effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (4)
1. The utility model provides a welding process of push away burnt pole U type grinding plate build-up welding wearing layer, U type grinding plate (2) both sides are provided with radian board (22) respectively, its characterized in that: welding the U-shaped grinding plate (2) through an auxiliary tool, and welding an even number of surfacing wear-resistant surfaces (21) on the surface of the U-shaped grinding plate (2); the auxiliary tool comprises a structural member portal (1), the structural member portal (1) comprises a portal-shaped support (11) and side frames (12) symmetrically arranged on two sides of the portal-shaped support (11), a plurality of pressing plate mounting grooves (13) in an inverted T shape are formed in the upper surface of the portal-shaped support (11), and adjusting tool mounting grooves (14) are formed between two side surfaces of the portal-shaped support (11) and the inner sides of the side frames (12) correspondingly; a pair of L-shaped anti-deformation pressing plates (3) are movably arranged on the front side and the rear side in each pressing plate mounting groove (13) respectively, the lower parts of the L-shaped anti-deformation pressing plates (3) are inverted T-shaped and are embedded in the pressing plate mounting grooves (13), the upper parts of the L-shaped anti-deformation pressing plates are L-shaped and are provided with threaded holes (31), and locking screw rods (4) are arranged in the threaded holes (31); adjusting fixing structural part tools (5) are respectively installed on the front side and the rear side in two corresponding adjusting tool installation grooves (14) on each side of the door-shaped support (11), each adjusting fixing structural part tool (5) comprises a fixing block (51) with two ends matched with the adjusting tool installation grooves (14), and a concave adjusting block (52) is rotatably arranged on the inner side of each fixing block (51); the welding process comprises the following steps:
step one, fixing a U-shaped grinding plate;
horizontally placing the U-shaped grinding plate (2) on a door-shaped support (11), respectively inserting radian plates (22) on two sides of the U-shaped grinding plate (2) into adjusting blocks (52) of adjusting and fixing structural part tools (5) on two sides of the door-shaped support (11) and adjusting the positions, respectively installing each pair of L-shaped anti-deformation pressing plates (3) into a pressing plate installation groove (13) on two sides of the U-shaped grinding plate (2), and then locking the U-shaped grinding plate (2) through a locking screw rod (4), so that welding of each surfacing wear-resistant surface (21) can be carried out;
step two, preparing before welding;
2.1), welding equipment: the direct current welding machine is used for combining digital control inversion type manual shielded metal arc welding and argon arc welding, the welding material of a bottoming transition layer adopts an H1Cr18Ni9Ti welding wire with the diameter of 2.5mm, the welding material of a surface wear-resistant alloy layer adopts a CAG-CO21 welding wire or a D707 welding wire with the diameter of 4.0mm, and the argon purity is more than or equal to 99.999 percent;
2.2), heating device: an electrical heating belt;
2.3), auxiliary facilities: angle grinder, file, hammer, flat shovel, mask, sample plate, thermodetector, magnifier, and heat insulation cotton;
2.4), weldment material: 16Mn of a body, transition layer stainless steel H1Cr18Ni9Ti, and outer layer wear-resistant alloy steel CAG-CO21 or D707;
2.5), the surfacing welding requirement before welding: cleaning the worn surface by a manual angle grinder to remove rust, grease and moisture, and preheating by using an electric heating belt;
2.6), welding position: horizontal overlaying;
2.7), welding requirements: all welding layers must be free of any welding defects and fused to the base material;
2.8), welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
step two, welding implementation;
2.1) preheating the positions of the surfacing wear-resistant surfaces (21) to be welded on the surface of the U-shaped grinding plate (2) to 150 ℃ by an electric heating belt, two welding devices are utilized to simultaneously carry out symmetrical welding of a priming transition layer at two positions of the surfacing wear-resistant surfaces (21), the welding sequence of the priming first layer is transverse welding, a linear strip conveying method is adopted, the thickness of a welding layer is strictly controlled to be 2-4 mm, meanwhile, the connection fusion between the welding beads and the fusion of the bottom layer are ensured, after the whole bottom layer at each position of the surfacing wear-resistant surface (21) is welded, the surface of the welding line is polished and leveled by a manual angle grinder, and after no defect is detected, the welding line is wrapped by heat preservation cotton for heat preservation, then, using the same welding process to symmetrically weld every two other positions of the surfacing wear-resistant surfaces (21) to be welded in sequence until the welding of the bottoming transition layer at all the positions of the surfacing wear-resistant surfaces (21) is finished;
2.2) after all the surfacing transition layers are welded and determined to be free of defects, symmetrically surfacing the surfacing layers on the surfacing transition layers at the positions of two surfacing wear-resistant surfaces (21) by using two welding devices, wherein the welding sequence is longitudinal welding, the welding method is crescent, the thickness is controlled to be 3-5 mm, mutual welding bead fusion connection and bottom fusion are ensured, after the welding is completed, the use size is manually ground and no defect is determined, symmetrically surfacing is sequentially performed on the surfaces of the surfacing transition layers at every two other surfacing wear-resistant surfaces (21) in the same mode until the surfaces of the surfacing transition layers at all the positions of the surfacing wear-resistant surfaces (21) are welded;
2.3) ensuring no welding defect of all the surfacing wear-resistant surfaces (21), carrying out smooth grinding on the surfaces of welding seams by using a manual angle grinder to reach the use size, carrying out postweld heat treatment by using an electric heating belt again, integrally heating each surfacing wear-resistant surface (21) to 300-350 ℃, ensuring that the temperature is uniformly increased and kept constant for 2 hours, then gradually cooling to room temperature, and recovering the use tolerance size after detecting and detecting defects to confirm that no defects exist, and delivering for use.
2. The process for welding the wear-resistant layer of the coke pushing rod U-shaped grinding plate through overlaying according to claim 1, wherein when the bottom transition layer is welded, a H1Cr18Ni9Ti welding wire with the diameter of phi 2.5mm is adopted, the welding current is 80-140A, the arc voltage is 24 +/-1V, and the welding speed is 13 +/-1 cm/min; when the surface overlaying layer is welded, a CAG-CO21 welding wire with the diameter of 4.0mm is adopted, the welding current is 170-190A, the arc voltage is 26 +/-1V, and the welding speed is 12 +/-1 cm/min.
3. The process for welding the wear-resistant layer on the push rod U-shaped grinding plate in a surfacing mode according to claim 2, wherein when the bottom transition layer is welded, the welding current is 90-110A, the arc voltage is 24 +/-1V, and the welding speed is 13 +/-1 cm/min; when the surface overlaying layer is welded, a CAG-CO21 welding wire with the diameter of 4.0mm is adopted, the welding current is 170-180A, the arc voltage is 26 +/-1V, and the welding speed is 12 +/-1 cm/min.
4. The process for welding the wear-resistant layer on the push rod U-shaped grinding plate in the overlaying mode according to claim 1, wherein the temperature is increased at a speed of 50 ℃/h in the process of postweld heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210105368.9A CN114393277B (en) | 2022-01-28 | 2022-01-28 | Welding process for overlaying wear-resistant layer on U-shaped grinding plate of coke pushing rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000202626A (en) * | 1999-01-20 | 2000-07-25 | Daido Steel Co Ltd | Al BASE STRUCTURE WITH HARD BUILT-UP LAYER, AND COMPOSITE MATERIAL FOR CLADDING BY WELDING USED THEREFOR |
| CN201144214Y (en) * | 2007-12-13 | 2008-11-05 | 王利传 | Novel sliding plate of coke pusher |
| CN201737890U (en) * | 2010-07-15 | 2011-02-09 | 太原煤气化股份有限公司焦化厂 | Wear-resistant slide plate of coke pushing machine |
| CN104308327A (en) * | 2014-10-27 | 2015-01-28 | 西安航空动力股份有限公司 | Technique for preventing defects of surfacing wear-resistant layer of part |
| CN109894716A (en) * | 2019-04-09 | 2019-06-18 | 安徽马钢设备检修有限公司 | Wear gas welding renovation technique and its equipment in a kind of yire mill horizontal roll shaft middle section |
| CN112935479A (en) * | 2021-03-25 | 2021-06-11 | 安徽马钢设备检修有限公司 | Welding device and repairing process for large wheel fixing table base fracture |
| CN113182646A (en) * | 2021-06-16 | 2021-07-30 | 安徽马钢设备检修有限公司 | Surfacing device and repairing process for abrasion of large vertical shaft end of finishing mill |
-
2022
- 2022-01-28 CN CN202210105368.9A patent/CN114393277B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000202626A (en) * | 1999-01-20 | 2000-07-25 | Daido Steel Co Ltd | Al BASE STRUCTURE WITH HARD BUILT-UP LAYER, AND COMPOSITE MATERIAL FOR CLADDING BY WELDING USED THEREFOR |
| CN201144214Y (en) * | 2007-12-13 | 2008-11-05 | 王利传 | Novel sliding plate of coke pusher |
| CN201737890U (en) * | 2010-07-15 | 2011-02-09 | 太原煤气化股份有限公司焦化厂 | Wear-resistant slide plate of coke pushing machine |
| CN104308327A (en) * | 2014-10-27 | 2015-01-28 | 西安航空动力股份有限公司 | Technique for preventing defects of surfacing wear-resistant layer of part |
| CN109894716A (en) * | 2019-04-09 | 2019-06-18 | 安徽马钢设备检修有限公司 | Wear gas welding renovation technique and its equipment in a kind of yire mill horizontal roll shaft middle section |
| CN112935479A (en) * | 2021-03-25 | 2021-06-11 | 安徽马钢设备检修有限公司 | Welding device and repairing process for large wheel fixing table base fracture |
| CN113182646A (en) * | 2021-06-16 | 2021-07-30 | 安徽马钢设备检修有限公司 | Surfacing device and repairing process for abrasion of large vertical shaft end of finishing mill |
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| CN114393277B (en) | 2023-06-16 |
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