CN114603236B - Simple welding device and welding method for cracking of large-sized high-voltage motor bottom lug seat - Google Patents
Simple welding device and welding method for cracking of large-sized high-voltage motor bottom lug seat Download PDFInfo
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- CN114603236B CN114603236B CN202210418433.3A CN202210418433A CN114603236B CN 114603236 B CN114603236 B CN 114603236B CN 202210418433 A CN202210418433 A CN 202210418433A CN 114603236 B CN114603236 B CN 114603236B
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- 238000003466 welding Methods 0.000 title claims abstract description 217
- 238000005336 cracking Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003825 pressing Methods 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 26
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229910052786 argon Inorganic materials 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000007547 defect Effects 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008439 repair process Effects 0.000 description 6
- 229910001060 Gray iron Inorganic materials 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Abstract
The invention discloses a simple welding device for cracking of a large-sized high-voltage motor base ear seat, which comprises a U-shaped structural member tool, wherein the structural member tool comprises two side plates arranged in parallel and a rear baffle fixedly connected to the end parts of the same side of the two side plates, two pairs of protrusions are correspondingly arranged on two sides of the top of the two side plates respectively, a front pressing plate and a rear pressing plate are detachably arranged on the tops of the two pairs of corresponding protrusions respectively, a plurality of front ejector rods and rear ejector rods are respectively arranged on the front pressing plate and the rear pressing plate in a penetrating manner, a front end pressing plate is detachably arranged on the end parts of the other sides of the two side plates, and a plurality of front end ejector rods are arranged on the front end pressing plate in a penetrating manner. The simple welding device for cracking the lug seat of the large-sized high-voltage motor has the advantages of novel design, simple and reasonable structure, simple and easy operation, and can effectively meet the welding requirement of the lug seat made of the nodular cast iron material by matching with the welding method, has short repairing time and low maintenance cost, and provides a scientific reference basis for welding and repairing other large-sized iron castings.
Description
Technical Field
The invention belongs to the technical field of welding, and relates to a simple welding device and a simple welding method for cracking of a large-sized high-voltage motor base lug.
Background
The large-sized high-voltage motor is a core device commonly used in high-voltage pump houses, such as a Bao Wu Ma steel rail transit material science and technology limited company, is an important train wheel production base in China, is a Asian largest wheel production enterprise, is also a domestic enterprise capable of producing bus wheels with the speed grade of more than 120Km/h, and has the advantages that the research and development of heavy-load wheels reach the international advanced level, two wheel production lines are shared at present, the annual output capacity is 80 ten thousand, the important departments of the high-voltage pump houses are high-voltage pump houses, 12 high-voltage water pumps are specially used for a two-line wheel rolling system, the conveying pressure is 32 megapascals, the high-voltage water pumps are placed on the ground in two rows, each high-voltage water pump is driven to do work through 12 520KW large-sized motors, and the connection mode is that one end of a crank gear in the high-voltage water pump is matched with one end of a large-sized motor shaft gear, and the two gears are matched and then 520KW large-sized motors are driven to operate. Because the long-term operation water supply of high-pressure water pump, the maintenance is maintained except daily some maintenance to the large-scale motor of 520KW, all can regularly carry out off-line delivery maintenance each year, and the schematic diagram of large-scale high-pressure motor as shown in fig. 1, this large-scale motor of 520KW often appears falling to the ground unstably and when many times the repeated installation of base ear seat 2 is fastened in the level of being out of order, directly leads to the fracture of base ear seat 2 face, can't wholly fix the supporting high-pressure water pump operation of large-scale motor of 520 KW. For the above situation, if the 520KW large motor is replaced as a whole only by the base lug cracking, a lot of cost is wasted, and if the local replacement time period of the manufacturer is long, the welding repair is required on site. Because the material of the 520KW large-sized motor body is spheroidal graphite cast iron, the main problems of welding the material are as follows: (1) The white hardening tendency and the hardening tendency of the spheroidal graphite cast iron during welding are larger than those of the gray cast iron; (2) The strength, plasticity and toughness of the spheroidal graphite cast iron are higher than those of gray cast iron, and the welding difficulty is higher; (3) The welding of the cracking part of the 520KW large-sized high-voltage motor base at the horizontal position is ensured, the original installation size is ensured to be recovered after single-sided welding, and the direct welding repair is difficult to ensure to meet the repair requirement of the base.
Disclosure of Invention
Aiming at the difficulties existing in welding repair of the cracks of the large-sized motor base in the background technology, the invention provides a simple welding device and a simple welding method for the cracks of the large-sized high-voltage motor base.
The technical scheme for solving the technical problems is as follows:
the invention relates to a simple welding device for cracking of a large-sized high-voltage motor base ear seat, which comprises a U-shaped structural member tool, wherein the structural member tool comprises two side plates arranged in parallel and a rear baffle fixedly connected to the end parts of the same side of the two side plates, two pairs of protrusions are correspondingly arranged on the two sides of the top of the two side plates respectively, a front pressing plate and a rear pressing plate are detachably arranged on the tops of the two pairs of corresponding protrusions respectively, a plurality of front ejector rods and rear ejector rods are respectively arranged on the front pressing plate and the rear pressing plate in a penetrating manner, a front end pressing plate is detachably arranged on the end parts of the other sides of the two side plates, and a plurality of front end ejector rods are arranged on the front end pressing plate in a penetrating manner.
Further, the two ends of the front pressing plate and the rear pressing plate are detachably connected and fixed with corresponding bulges on the side plates through the front connecting screw rod and the rear connecting screw rod respectively.
Further, two ends of the front end pressing plate are detachably connected and fixed with the ends of the two side plates through front end screws respectively.
Further, the side plates and the rear baffle are welded and fixed.
Further, the structural member tool, the front pressing plate, the rear pressing plate and the front end pressing plate are all manufactured through steel plates with the thickness of 50mm respectively; the front connecting screw rod, the front ejector rod, the rear connecting screw rod, the rear ejector rod, the front end connecting screw rod and the front end ejector rod are all manufactured through phi 40mm round bars respectively.
The invention relates to a welding method for cracking of a large-sized high-voltage motor base ear seat, which is carried out by using a simple welding device for cracking of the large-sized high-voltage motor base ear seat, wherein the base ear seat of the large-sized high-voltage motor has a cracking part after long-term use, and the steps are as follows:
step one, preparing before welding;
1.1 -welding equipment: digitally controlling inversion type manual welding rod arc welding and argon arc welding to be combined by using a direct current welding machine, wherein a Z258 welding rod is adopted as a welding material;
1.2 A heating device): h01-20 heating gun;
1.3 -auxiliary facilities): angle grinder, file, hand hammer, flat spade, face mask, sample plate, thermometer, magnifying glass and heat preservation cotton;
1.4 Weld material): a body spheroidal graphite cast iron;
1.5 Surfacing requirements before welding): removing rust, grease and water by machining and cleaning the worn surface;
1.6 A) welding position: the whole welding seam is welded with a V-shaped groove horizontally and on one side;
1.7 -welding requirements): all the welding layers must be free of any welding defects and fused to the base material;
1.8 And welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
step two, welding is carried out;
2.1 Cutting a single-sided V-shaped groove at the cracking part of the bottom ear seat by adopting a manual angle grinder, then installing a structural member tool on the bottom ear seat, respectively pressing the horizontal planes at two sides of the V-shaped groove of the bottom ear seat by a front ejector rod and a rear ejector rod, pressing the front end part of the bottom ear seat by a front end part ejector rod, heating to 500-600 ℃ at 20-30mm at two sides of the V-shaped groove by an oxygen-acetylene flame baking gun, performing temperature verification by adopting a temperature measuring gun, after the temperature is reached, welding by using a digital control inversion type manual welding rod arc welding machine and an argon arc welding machine, and performing bottom welding by adopting a Z258 welding rod with the diameter of 3.2mm, wherein the welding rod conveying method is straight, the root bottom is penetrated, and welding is continuously welded by adopting a medium arc length of 8-12mm, so that graphite spheroidizing is performed by the combined action of a welding core and a coating, and no welding defects such as cracks are confirmed after welding is completed;
2.2 When the filling layer and the cover layer are welded, the temperature between layers is controlled to be kept at 500-600 ℃, the digital control inversion type manual electrode arc welding and argon arc welding are adopted to be combined, a direct current welding machine is used for welding by using a Z258 electrode with the diameter of 4.0mm, the horizontal included angle of the electrode is 80-90 degrees, the strip conveying method is in a small crescent shape, continuous welding with the arc length of 12-18mm is adopted, the melting of a coating and the transition of graphite into a molten pool are facilitated, the head and the tail are completely covered, and hammering is adopted immediately after each layer is welded, so that the surface of a welding line is covered with pits, and the welding stress is eliminated; the surface of the overlay welding layer is higher than the base material, so that smooth transition with the base material is convenient for manual grinding;
2.3 After all welding of the cracking parts are finished, heating the whole welding seam by using an H01-20 heating gun to eliminate stress and normalizing at 500-700 ℃, adopting heat preservation cotton to cover the whole welding seam after slowly cooling to 250 ℃, cooling to room temperature, splitting a simple welding device for cracking the large-sized high-voltage motor base ear seat, detecting and detecting to confirm that the welding seam has no defect, precisely grinding the welding seam of the base ear seat by using a manual angle grinder, and comparing by adopting a template which is manufactured firstly and accords with the welding seam, and recovering the use tolerance size.
Further, the welding equipment is a welding machine for combining digital control inversion type manual welding rod arc welding and argon arc welding with the model HT400D or HT 500D.
Further, when the bottom layer is welded, a Z258 welding rod with the diameter of 3.2mm is adopted, the welding current is 110-140A, the arc voltage is 25+/-1V, and the welding speed is 17+/-1 cm/min; during the welding of the overlay welding layer, a Z258 welding rod with the diameter of 4.0mm is adopted, the welding current is 160-200A, the arc voltage is 28+/-1V, and the welding speed is 19+/-1 cm/min.
Compared with the prior art, the simple welding device for the cracking of the lug seat of the large-sized high-voltage motor has the advantages of novel design, simple and reasonable structure, convenient material drawing and manufacturing, simple operation, effective guarantee of the cracking position of the lug seat of the large-sized motor at a single-sided horizontal welding position and effective prevention of welding deformation through the arrangement of the structural member tool and each pressing plate; the simple welding device for cracking the lug seat of the large-sized high-voltage motor is matched with the welding method, so that the welding requirement of the lug seat of the base made of the nodular cast iron is effectively met, the repairing time is short, the maintenance cost is low, and a scientific reference basis is provided for welding and repairing other large-sized iron castings.
Drawings
FIG. 1 is a schematic diagram of a large high voltage motor according to the present invention;
FIG. 2 is a schematic view of a simplified apparatus of the present invention;
FIG. 3 is an exploded view of the simplified apparatus of the present invention;
FIG. 4 is a schematic view of a structural part tooling according to the present invention;
in the figure: 1. a large high voltage motor; 2. a bottom ear seat; 2.1, cracking part; 2.2, V-shaped grooves; 3. a structural member tool; 3.1, side plates; 3.2, a rear baffle; 3.3, protruding; 4. a rear pressing plate; 5. a rear connecting screw; 6. a rear ejector rod; 7. a front platen; 8. a front connecting screw; 9. a front compression bar; 10. a front end pressing plate; 11. the front end part is connected with a screw rod; 12. a front end ejector rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in the specification and claims of the present disclosure, "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "transverse", "longitudinal", etc. are used merely to indicate relative positional relationships, which change when the absolute position of the object to be described changes accordingly.
Example 1:
as shown in fig. 1-4, the four corners of the bottom of the large-sized high-voltage motor 1 are respectively provided with a base ear seat 2, and after long-term use and maintenance, each base ear seat 2 is easy to crack and is 2.1, so that the normal operation of the large-sized high-voltage motor 1 is influenced; in order to fix and prevent welding deformation when the cracking of the base ear seat 2 is subjected to 2.1 welding repair and ensure that the cracking part 2.1 is positioned at a horizontal welding position, the invention relates to a simple welding device for the cracking of the base ear seat of a large-sized high-voltage motor, which comprises a U-shaped structural member tool 3, wherein the structural member tool 3 comprises two side plates 3.1 which are arranged in parallel and a rear baffle 3.2 which is welded and connected to the same side end part of the two side plates 3.1, the top of the rear baffle 3.2 is higher than the height of the two side plates 3.1, two pairs of bulges 3.3 are correspondingly arranged on the two sides of the top of the two side plates 3.1 respectively, a front pressing plate 7 and a rear pressing plate 4 are detachably arranged on the tops of the two pairs of corresponding bulges 3.3 respectively, a plurality of front ejector rods 9 and rear ejector rods 6 are respectively arranged on the front pressing plate 7 and the rear pressing plate 4 in a penetrating manner, a front end part 10 is detachably arranged on the other side end part of the two side plates 3.1, and a plurality of front end ejector rods 12 are arranged on the front end part pressing plate 10 in a penetrating manner. Preferably, two ends of the front pressing plate 7 and the rear pressing plate 4 are detachably connected and fixed with corresponding bulges 3.1 on the side plates 3.1 through a front connecting screw rod 8 and a rear connecting screw rod 5 respectively; both ends of the front end pressing plate 10 are detachably connected and fixed with the ends of the two side plates 3.1 through front end screws 11 respectively.
During manufacturing, the structural member tool 3, the front pressing plate 7, the rear pressing plate 4 and the front end pressing plate 10 are manufactured by machining steel plates with the thickness of 50mm respectively, the manufacturing size of the structural member tool 3 is manufactured according to the size specification of the bottom ear seat 2, then threaded holes are respectively formed in the top and the front end of the bulge 3.1 and are used for being in threaded connection with connecting screws, and threaded holes are also respectively formed in the front pressing plate 7, the rear pressing plate 4 and the front end pressing plate 10 and are respectively used for being in threaded connection with the front ejector rod 9, the rear ejector rod 6 and the front end ejector rod 12; the front connecting screw rod 8, the front ejector rod 9, the rear connecting screw rod 5, the rear ejector rod 6, the front end connecting screw rod 11 and the front end ejector rod 12 are respectively manufactured through phi 40mm round bars and are respectively provided with external threads for being connected with threaded holes on the structural member tool 3, the front pressing plate 7, the rear pressing plate 4 and the front end pressing plate 10, and two sides of the cracking part 2.1 of the bottom ear seat 2 are pressed in the structural member tool 3.
During application, the structural member fixture 3 is arranged on the base lug 2, the rear pressing plate 4, the front pressing plate 7 and the front end pressing plate 10 are fixedly connected to the structural member fixture 3 through the rear connecting screw 5, the front connecting screw 8 and the front end connecting screw 11, then each rear ejector rod 6, each front ejector rod 9 and each front end ejector rod 12 are arranged on each pressing plate, each rear ejector rod 6, each front ejector rod 9 and each front end ejector rod 12 respectively support the base lug 2, the front ejector rods 9 and the rear ejector rods 6 are respectively located on two sides of a cracking groove 2.1, original sizes of two sides of the cracking part 2.1 can be kept in the process of single-sided welding of the cracking part 2.1, and finally welding repair is implemented.
Example 2:
as shown in fig. 1 to 4, the welding method for the base ear base cracking of the large-sized high-voltage motor according to the present invention, wherein the base ear base 2 of the large-sized high-voltage motor 1 has a cracking part 2.1 after long-term use, and the welding method is performed by using the simple welding device for the base ear base cracking of the large-sized high-voltage motor according to embodiment 1, and comprises the following steps:
step one, preparing before welding;
1.1 -welding equipment: the model is HT400D or HT500D digital control inversion type manual welding rod arc welding and argon arc welding are combined by a direct current welding machine, and a Z258 welding rod is adopted as a welding material;
1.2 A heating device): h01-20 heating gun;
1.3 -auxiliary facilities): angle grinder, file, hand hammer, flat spade, face mask, sample plate, thermometer, magnifying glass and heat preservation cotton;
1.4 Weld material): a body spheroidal graphite cast iron;
1.5 Surfacing requirements before welding): removing rust, grease and water by machining and cleaning the worn surface;
1.6 A) welding position: the whole welding seam is welded with a V-shaped groove horizontally and on one side;
1.7 -welding requirements): all the welding layers must be free of any welding defects and fused to the base material;
1.8 And welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
welding process parameters
Step two, welding is carried out;
2.1 Cutting a single-sided V-shaped groove 2.2 along a cracking part at a cracking part 2.1 of a bottom ear seat 2 by adopting a manual angle grinder, then installing a structural member tool 3 at the outer side of the bottom ear seat 2, respectively pressing the horizontal planes at two sides of the V-shaped groove 2.2 of the bottom ear seat 2 by a front ejector rod 9 and a rear ejector rod 6, pressing the front end part of the bottom ear seat 2 by the top of a front end ejector rod 12, heating to 500-600 ℃ at 20-30mm at two sides of the V-shaped groove 2.2 by adopting an oxygen-acetylene flame gun, adopting a temperature measuring gun for temperature verification, after the temperature reaches, using a digital control inversion type manual electrode arc welding machine and an argon arc welding machine, and adopting a Z258 welding rod with the diameter of 3.2mm for bottom welding, welding high-current continuous welding, wherein the electrode strip conveying method is straight line, the bottom of the root is completely melted, and welding defects such as no cracks are confirmed after welding is finished by adopting a welding core and coating; in the step, the white-mouth tendency and the hardening tendency of spheroidal graphite cast iron during welding are larger than those of gray cast iron, so that a high-temperature preheating welding method with the preheating temperature of generally 500-600 ℃ is adopted, meanwhile, the strength, the plasticity and the toughness of spheroidal graphite cast iron are higher than those of gray cast iron, the mechanical property of a welding joint is necessarily required to be matched with that of a base metal, a Z258 welding rod is selected, graphite in a welding line is spheroidized under the combined action of a welding core and a coating, and welding deformation is prevented by a simple welding device for cracking a large-sized high-voltage motor base lug;
2.2 When the filling layer and the cover layer are welded, the temperature between layers is controlled to be kept at 500-600 ℃, the digital control inversion type manual electrode arc welding and argon arc welding are adopted to be combined, a direct current welding machine is used for welding by using a Z258 electrode with the diameter of 4.0mm, the horizontal included angle of the electrode is 80-90 degrees, the strip conveying method is in a small crescent shape, continuous welding with the arc length of 12-18mm is adopted, the melting of a coating and the transition of graphite into a molten pool are facilitated, the head and the tail are completely covered, and hammering is adopted immediately after each layer is welded, so that the surface of a welding line is covered with pits, and the welding stress is eliminated; the surface of the overlay welding layer is higher than the base material, so that smooth transition with the base material is convenient for manual grinding;
2.3 After the whole welding of the cracking part 2.1 is finished, heating the whole welding seam by using an H01-20 heating gun to eliminate stress and normalizing the whole welding seam, adopting heat preservation cotton to cover the whole welding seam after the whole welding seam is slowly cooled to 250 ℃, cooling to room temperature, then splitting a simple welding device for cracking the bottom ear seat of the large-sized high-voltage motor, accurately grinding and processing the welding seam of the bottom ear seat 2 by using a manual angle grinder after detecting and detecting that the welding seam has no defect, and adopting a template which is manufactured firstly to be matched to carry out comparison, so that the tolerance size is restored to use.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention should be defined by the claims.
Claims (7)
1. The welding method for the cracking of the bottom ear seat of the large high-voltage motor is characterized in that a simple welding device for the cracking of the bottom ear seat of the large high-voltage motor is used, the welding method comprises a U-shaped structural member tool (3), the structural member tool (3) comprises two side plates (3.1) which are arranged in parallel and a rear baffle (3.2) which is fixedly connected to the end part of the same side of the two side plates (3.1), two pairs of protrusions (3.3) are correspondingly arranged on two sides of the top of the two side plates (3.1), a front pressing plate (7) and a rear pressing plate (4) are detachably arranged on the tops of the two pairs of corresponding protrusions (3.3), a plurality of front ejector rods (9) and rear ejector rods (6) are respectively arranged on the front pressing plate (7) and the rear pressing plate (4) in a penetrating manner, a front pressing plate (10) is detachably arranged on the end part of the other side of the two side plates (3.1), and a plurality of front pressing plates (10) are respectively arranged on the top of the two pairs of protrusions (3.3.3) and the front pressing plate (4) and the front pressing plate (10) is respectively arranged on the front pressing plate and the front pressing plate (10 and the rear pressing plate; the method comprises the following steps:
step one, preparing before welding;
1.1 -welding equipment: digitally controlling inversion type manual welding rod arc welding and argon arc welding to be combined by using a direct current welding machine, wherein a Z258 welding rod is adopted as a welding material;
1.2 A heating device): h01-20 heating gun;
1.3 -auxiliary facilities): angle grinder, file, hand hammer, flat spade, face mask, sample plate, thermometer, magnifying glass and heat preservation cotton;
1.4 Weld material): a body spheroidal graphite cast iron;
1.5 Surfacing requirements before welding): removing rust, grease and water by machining and cleaning the worn surface;
1.6 A) welding position: the whole welding seam is welded with a V-shaped groove horizontally and on one side;
1.7 -welding requirements): all the welding layers must be free of any welding defects and fused to the base material;
1.8 And welding process parameters: setting welding parameters according to welding equipment, welding materials, weldment materials and welding requirements;
step two, welding is carried out;
2.1 Cutting a single-sided V-shaped groove (2.2) at a cracking part (2.1) of a bottom ear seat (2) by adopting a manual angle grinder, installing a structural member tool (3) on the bottom ear seat (2), respectively pressing the horizontal planes at two sides of the V-shaped groove (2.2) of the bottom ear seat (2) by a front ejector rod (9) and a rear ejector rod (6), pressing the front end part of the bottom ear seat (2) by a front end ejector rod (12), heating to 500-600 ℃ at two sides of the V-shaped groove (2.2) by an oxygen-acetylene flame gun at 20-30mm, adopting a temperature measuring gun for temperature verification, after the temperature is reached, using a digital control inversion manual arc welding machine and argon arc welding machine, using a Z258 with phi of 3.2mm for bottom welding, adopting a welding rod strip conveying method to be straight, adopting a 8-12mm medium arc length continuous welding, adopting the combined action of a core and a coating to lead the weld bead to spheroidize, and confirming the defects of no cracks after the welding is finished;
2.2 When the filling layer and the cover layer are welded, the temperature between layers is controlled to be kept at 500-600 ℃, the digital control inversion type manual electrode arc welding and argon arc welding are adopted to be combined, a direct current welding machine is used for welding by using a Z258 electrode with the diameter of 4.0mm, the horizontal included angle of the electrode is 80-90 degrees, the strip conveying method is in a small crescent shape, continuous welding with the arc length of 12-18mm is adopted, the melting of a coating and the transition of graphite into a molten pool are facilitated, the head and the tail are completely covered, and hammering is adopted immediately after each layer is welded, so that the surface of a welding line is covered with pits, and the welding stress is eliminated; the surface of the overlay welding layer is higher than the base material, so that smooth transition with the base material is convenient for manual grinding;
2.3 After all welding of the cracking part (2.1) is finished, heating the whole welding seam by using an H01-20 heating gun to eliminate stress normalizing treatment at 500-700 ℃, adopting heat preservation cotton to cover the whole welding seam as the whole welding seam is slowly cooled to 250 ℃, cooling to room temperature, splitting a simple welding device for cracking the large-sized high-voltage motor base ear seat, detecting flaw detection to confirm that the welding seam has no any defect, precisely grinding the welding seam of the base ear seat (2) by using a manual angle grinder, and adopting a template which is manufactured firstly to match, so that the use tolerance size is recovered.
2. The welding method for the cracking of the lug seat of the large-sized high-voltage motor, according to claim 1, is characterized in that: the welding equipment is a welding machine for combining manual arc welding and argon arc welding with digital control inversion type manual arc welding with the model HT400D or HT 500D.
3. The welding method for the cracking of the lug seat of the large-sized high-voltage motor, according to claim 1, is characterized in that: when the bottom layer is welded, a Z258 welding rod with the diameter of 3.2mm is adopted, the welding current is 110-140A, the arc voltage is 25+/-1V, and the welding speed is 17+/-1 cm/min; during the welding of the overlay welding layer, a Z258 welding rod with the diameter of 4.0mm is adopted, the welding current is 160-200A, the arc voltage is 28+/-1V, and the welding speed is 19+/-1 cm/min.
4. The welding method for the cracking of the lug seat of the large-sized high-voltage motor, according to claim 1, is characterized in that: the two ends of the front pressing plate (7) and the rear pressing plate (4) are detachably connected and fixed with corresponding bulges (3.3) on the side plates (3.1) through a front connecting screw (8) and a rear connecting screw (5) respectively.
5. The welding method for the cracking of the lug seat of the large-sized high-voltage motor, which is characterized in that: both ends of the front end pressing plate (10) are detachably connected and fixed with the ends of the two side plates (3.1) through front end connecting screws (11) respectively.
6. The welding method for the cracking of the lug seat of the large-sized high-voltage motor, which is characterized in that: the side plates (3.1) and the rear baffle (3.2) are welded and fixed.
7. The welding method for the cracking of the lug seat of the large-sized high-voltage motor, as claimed in claim 6, is characterized in that: the structural member tool (3), the front pressing plate (7), the rear pressing plate (4) and the front end pressing plate (10) are respectively manufactured by steel plates with the thickness of 50 mm; the front connecting screw (8), the front ejector rod (9), the rear connecting screw (5), the rear ejector rod (6), the front end connecting screw (11) and the front end ejector rod (12) are respectively manufactured through phi 40mm round bars.
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| CN202210418433.3A CN114603236B (en) | 2022-04-20 | 2022-04-20 | Simple welding device and welding method for cracking of large-sized high-voltage motor bottom lug seat |
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| CN202210418433.3A CN114603236B (en) | 2022-04-20 | 2022-04-20 | Simple welding device and welding method for cracking of large-sized high-voltage motor bottom lug seat |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0672971U (en) * | 1993-03-25 | 1994-10-11 | 新明和工業株式会社 | Work positioning device |
| CN101554688A (en) * | 2009-05-15 | 2009-10-14 | 西安理工大学 | Flux-cored alloyed ductile cast iron homogeneous gas-welding wire and electric welding rod |
| CN202934040U (en) * | 2012-08-14 | 2013-05-15 | 合肥中南光电有限公司 | Pressing device for frame joints of solar cells |
| CN104084680A (en) * | 2014-05-27 | 2014-10-08 | 宁夏共享装备有限公司 | Slight chromatic aberration welding technology for spheroidal graphite iron casting |
| CN206316791U (en) * | 2016-11-23 | 2017-07-11 | 大连升隆机械有限公司 | The multi-diameter shaft end flat milling tool of bull-dozer |
| CN111168322A (en) * | 2019-12-31 | 2020-05-19 | 湖北腾升科技股份有限公司 | Repair welding process of nodular cast iron roller |
| CN212599931U (en) * | 2020-06-22 | 2021-02-26 | 芜湖自力机械制造有限公司 | Welding fixture for machining side plate of air cooler |
| KR200495087Y1 (en) * | 2020-08-25 | 2022-03-03 | (주)에이치제이중공업 | Tool for Small Section Steel Joint Welding |
| CN217394001U (en) * | 2022-04-20 | 2022-09-09 | 安徽马钢设备检修有限公司 | Simple welding device for cracking of large-scale high-voltage motor base lug |
-
2022
- 2022-04-20 CN CN202210418433.3A patent/CN114603236B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0672971U (en) * | 1993-03-25 | 1994-10-11 | 新明和工業株式会社 | Work positioning device |
| CN101554688A (en) * | 2009-05-15 | 2009-10-14 | 西安理工大学 | Flux-cored alloyed ductile cast iron homogeneous gas-welding wire and electric welding rod |
| CN202934040U (en) * | 2012-08-14 | 2013-05-15 | 合肥中南光电有限公司 | Pressing device for frame joints of solar cells |
| CN104084680A (en) * | 2014-05-27 | 2014-10-08 | 宁夏共享装备有限公司 | Slight chromatic aberration welding technology for spheroidal graphite iron casting |
| CN206316791U (en) * | 2016-11-23 | 2017-07-11 | 大连升隆机械有限公司 | The multi-diameter shaft end flat milling tool of bull-dozer |
| CN111168322A (en) * | 2019-12-31 | 2020-05-19 | 湖北腾升科技股份有限公司 | Repair welding process of nodular cast iron roller |
| CN212599931U (en) * | 2020-06-22 | 2021-02-26 | 芜湖自力机械制造有限公司 | Welding fixture for machining side plate of air cooler |
| KR200495087Y1 (en) * | 2020-08-25 | 2022-03-03 | (주)에이치제이중공업 | Tool for Small Section Steel Joint Welding |
| CN217394001U (en) * | 2022-04-20 | 2022-09-09 | 安徽马钢设备检修有限公司 | Simple welding device for cracking of large-scale high-voltage motor base lug |
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| CN114603236A (en) | 2022-06-10 |
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