CN112935472A - Wheel dephosphorization electric reciprocating pump body water tank crack welding device and repair process - Google Patents
Wheel dephosphorization electric reciprocating pump body water tank crack welding device and repair process Download PDFInfo
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- CN112935472A CN112935472A CN202110319255.4A CN202110319255A CN112935472A CN 112935472 A CN112935472 A CN 112935472A CN 202110319255 A CN202110319255 A CN 202110319255A CN 112935472 A CN112935472 A CN 112935472A
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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
- B23K9/042—Built-up welding on planar surfaces
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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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Abstract
The invention discloses a crack welding device for a water tank of a wheel dephosphorization electric reciprocating pump body, which comprises a base, a back connection fixing steel plate detachably arranged on the back side of the upper surface of the base, two bevel surface fixing pull plates detachably arranged on the front side of the upper surface of the base at intervals respectively, and an upper pressure plate detachably connected and fixed with the back connection fixing steel plate and the two bevel surface fixing pull plates respectively. The invention also provides a repair process of the welding device for the cracks of the water tank of the wheel dephosphorization electric reciprocating pump body, and aims at solving the problems in the background art. The method can quickly implement and finish the crack welding repair of the water tank of the electric reciprocating cast iron pump body, reduce the purchase and maintenance cost, reduce the long-time shutdown loss and provide guarantee for reasonably assembling and producing various domestic and foreign wheels by steel rolling.
Description
Technical Field
The invention belongs to the technical field of welding, and relates to a welding device and a repair process for cracks of a water tank of a wheel dephosphorization electric reciprocating pump body.
Background
The dephosphorization of wheel blanks after rolling and heating in a wheel production line of a horse steel rail transit material science and technology limited company generally uses a 32MPa horizontal plunger electric reciprocating pump, the quality of the dephosphorization effect directly influences the rolling quality of wheel products, the working principle is that a motor is connected with an input shaft of a speed reducer through a coupler, an output shaft of the speed reducer drives a crankshaft to rotate, a connecting rod, a crosshead and a plunger are driven to rotate to drive the connecting rod, the crosshead and the plunger to do reciprocating motion, the plunger is sealed by a filler, and the purpose of sucking and discharging high-pressure water is achieved under the matching of a suction valve and a discharge valve. The water tank of the pump body of the horizontal plunger electric reciprocating pump is used for taking away heat of high-temperature lubricating oil in the pump body so as to prevent the lubricating oil from being ultrahigh in temperature in the working process. After some horizontal plunger electric reciprocating pumps are used for a long time, irregular penetrating cracks with different lengths (such as 1M length) can appear in a water tank of a pump body, cooling water for cooling lubricating oil flows away along the cracks and cannot cool the lubricating oil, the lubricating oil cannot be cooled in time, heat generated between friction pairs of moving parts cannot be taken away by the lubricating oil at all in the operation process of the pump, meanwhile, the lubricating oil is deteriorated due to high oil temperature, the lubricating effect is influenced, and abrasion between the motion pairs is increased. If the horizontal plunger electric reciprocating pump continues to operate without replacement or repair, the whole horizontal plunger electric reciprocating pump can be quickly damaged during movement, and even the pump cannot be continuously used due to thermal deformation between matching surfaces of pump bodies. However, if the pump is replaced with a new one, not only the purchase cycle is long, but also the purchase cost of the 32MPa horizontal plunger electric reciprocating pump is high, which will affect the production. In order to restore production as soon as possible, the pump body water tank cracks need to be repaired.
Disclosure of Invention
Aiming at the problems in the background art, the invention provides a repair process of a crack welding device for a water tank of an electric reciprocating pump body of wheel dephosphorization, which can quickly complete the crack welding repair of the water tank of the electric reciprocating cast iron pump body after being applied, reduce the purchase and maintenance cost, reduce the long-time shutdown loss and provide guarantee for reasonably manufacturing various domestic and foreign wheels by steel rolling.
The technical scheme for solving the technical problem of the invention is as follows:
the invention relates to a crack welding device for a water tank of a wheel dephosphorization electric reciprocating pump body, which comprises a base, a back connection fixing steel plate vertically detachably arranged on the back side of the upper surface of the base, two bevel surface fixing pull plates respectively vertically detachably arranged on the front side of the upper surface of the base at intervals, and an upper pressure plate vertically detachably connected and fixed with the back connection fixing steel plate and the two bevel surface fixing pull plates respectively.
Further, the base comprises a bottom plate and a plurality of supporting legs arranged at the bottom of the bottom plate.
Furthermore, the upper pressing plate and the back surface are fixedly connected with the upper ends of the fixed steel plates and the two bevel face fixed pull plates, and the bottom plate and the back surface are fixedly connected with the lower ends of the fixed steel plates and the two bevel face fixed pull plates through bolts.
Furthermore, a plurality of triangular fixing plates are welded between the supporting legs and the bottom plate.
Furthermore, the bottom plate is also provided with a pump body supporting leg
Furthermore, the upper pressure plate and the bottom plate are provided with limit holes and/or limit grooves.
Another technical solution to solve the technical problem of the present invention is as follows:
based on above-mentioned technical scheme repair technology of electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization for the welding repair of electronic reciprocal pump body water tank crackle, set up V type groove along electronic reciprocal pump body water tank crackle earlier, then erect the base, place the electronic reciprocal pump body at the base, and install back connection fixed steel sheet and two fixed arm-tie of bevel face respectively in the front and back side of base, ensure to treat to weld prosthetic water tank crackle and be located between the fixed arm-tie of two bevel face, install the top board at last and implement the welding after fixing the electronic reciprocal pump body, the step is as follows:
step one, preparing before welding;
1.1), welding equipment: the HT400D digital control inversion type manual direct current welding machine is characterized in that a Z308 welding rod is adopted as a welding material, and the welding rod is baked for 2 hours at the temperature of 200-250 ℃ and then is kept at a constant temperature and taken at any time;
1.2), welding position: vertical welding;
1.3), cleaning before welding: removing water and oil inside and outside the groove by using oxyacetylene flame, and then polishing and derusting by using a sand cloth or a grinding wheel machine;
1.4), welding requirements: the welding technology of single-side welding and double-side forming fuses the base material of the overlaying layer, thereby preventing white spots and hardening structures.
1.5), weldment material: casting iron;
1.6), auxiliary facilities: a heat-preserving barrel, a sample plate, a temperature measuring instrument, a magnifier and heat-preserving cotton. Face mask, gloves, scarfing cinder hammer, chisel, file, wire brush, abrasive paper, steel ruler, level bar, activity wrench, straight mill, angle grinder. Wire cutters, hacksaw blades, labor protection supplies;
1.7), welding parameters: determining welding parameters according to welding equipment, welding materials and welding requirements;
step two, welding and repairing;
considering the particularity of welding repair of ferrous metal cast iron materials of a water tank of an electric reciprocating pump body, uniformly preheating a V-shaped groove and two sides of the V-shaped groove to reach a preheating temperature, then welding a bottom layer, performing welding along the same direction of a crack from bottom to top, adopting a regular triangle strip conveying method for welding rods, forming an included angle of 60-90 degrees between the welding rods and a vertical surface of a welding seam, adopting arc extinguishing operation to achieve single-side welding and double-side forming, adopting an air shovel to hammer welding meat after the welding of the bottom layer is completed, enabling the welding meat to be uniformly distributed with small pits, and then detecting to ensure that the welding seam does not have any welding; the filling layer and the cover surface layer adopt a multilayer and multi-pass welding method, in order to reduce heat loss and prevent an operator from being radiated by high temperature, the rest parts except the welding part are covered by heat insulation materials, welding rods are used for carrying out linear or small circle type strip conveying, welding is carried out by adopting a medium arc length of 5-8 mm, the welding seam of each section is not suitable to be overlong, each section is welded, the welding meat is hammered by a pneumatic shovel immediately to be welded, small pockmarks are uniformly distributed in the welding meat, then the welding meat on the upper surface of the welding bead is polished by a grinding wheel, the interlayer temperature is controlled to be not lower than 250 ℃, and then the next section is; and each layer of the filling layer and the cover surface layer is detected to ensure that no welding defect exists, after welding is finished, the temperature of the water tank of the electric reciprocating pump body is uniformly raised to 650-900 ℃ at the speed of 150 DEG/h, then the box body is covered by a heat-insulating cotton bundle and slowly cooled to room temperature, finally the box body which is welded is machined to meet the assembly size, and the box body is delivered for use after being detected to be qualified.
Furthermore, a Z308 welding rod with the diameter of 3.2mm is adopted as the bottom layer, the welding current is 80-95A, the voltage is 22 +/-1V, and the welding speed is 15 +/-1 cm/min; the filling layer and the cover layer adopt a Z308 welding rod with phi of 4.0mm, the welding current is 90-130A, the voltage is 23 +/-1V, and the welding speed is 15 +/-1 cm/min.
Further, before the first layer of backing welding, oxygen-acetylene flame, coal gas heating or electric heater is adopted for baking, and the two sides of the groove are preheated to 350 ℃.
Compared with the prior art, the repair process of the wheel dephosphorization electric reciprocating pump body water tank crack welding device is safe and easy to operate, stable in welding quality, low in investment cost, capable of meeting actual field requirements, high in working efficiency, capable of greatly reducing maintenance cost, capable of reducing wheel rolling shutdown loss and capable of guaranteeing wheel assembly production of various specifications reasonably.
Drawings
FIG. 1 is a schematic structural view of a crack welding device for a water tank of a wheel dephosphorization electric reciprocating pump body;
FIG. 2 is a schematic diagram of a welding process of the crack welding device for the water tank of the wheel dephosphorization electric reciprocating pump body;
in the figure: 1. an electrically reciprocating pump body; 2. a base; 21. a base plate; 22. supporting legs; 23. a triangular fixing plate; 24. supporting feet of the pump body; 3. an upper pressure plate; 4. the back is connected with a fixed steel plate; 5. fixing a pulling plate on the bevel face; 6. a bolt; 7. a limiting hole; 8. a limiting groove; .
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", 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.
Example 1:
as shown in fig. 1 and 2, the crack welding device for the water tank of the wheel dephosphorization electric reciprocating pump body comprises a base 2, a back connection fixing steel plate 4 vertically detachably arranged on the back side of the upper surface of the base 2, two bevel surface fixing pull plates 5 vertically detachably arranged on the front side of the upper surface of the base 2 at intervals respectively, and an upper pressure plate 3 vertically detachably connected and fixed with the back connection fixing steel plate 4 and the two bevel surface fixing pull plates 5 respectively; the base 2 comprises a bottom plate 21 and a plurality of supporting legs 22 arranged at the bottom of the bottom plate 21; the upper pressing plate 3 and the back surface are fixedly connected with the upper ends of the fixed steel plate 4 and the two bevel face fixed pulling plates 5, and the bottom plate 21 and the back surface are fixedly connected with the lower ends of the fixed steel plate 4 and the two bevel face fixed pulling plates 5 through bolts 6. In this example, the shapes and the fixed positions of the bottom plate 21, the upper pressure plate 3, the back connection fixed steel plate 4 and the bevel face fixed pulling plate 5 in the welding device can be adjusted and manufactured according to the specifications of the fixed electric reciprocating pump body, so as to be suitable for the fixation of various electric reciprocating pump bodies and facilitate the welding repair of cracks on the electric reciprocating pump bodies. In this embodiment, the upper plate 3, the bottom plate 21 and the back connection fixing steel plate 4 are all made of 50mm steel plates, and the upper plate 3 and the bottom plate 21 can be provided with the limiting holes 7 and/or the limiting grooves 8 according to the specifications of the electric reciprocating pump body 1 to be placed, for example, the water tank of the electric reciprocating pump 1 in fig. 2 has a convex upper opening and a convex lower opening, so that the limiting holes 7 and/or the limiting grooves 8 can be correspondingly formed in the upper plate 3 and the bottom plate 21, and the electric reciprocating pump body 1 can be conveniently positioned and fixed in application, and therefore, the electric reciprocating pump body is convenient and practical. The supporting legs 22 are made of 50mm square steel; the bevel face fixed pull plate 5 is formed by cutting 10mm flat steel, and a welding port is formed between the two bevel face fixed pull plates 5, so that the welding operation is convenient. A plurality of triangular fixing plates 23 are welded between the supporting legs 22 and the bottom plate 21, and the triangular fixing plates 23 are formed by cutting 30mm steel plates; in this embodiment, the bottom plate 21 may further be provided with a pump body support leg 24 according to actual needs to support the water tank of the electric reciprocating pump 1, and the pump body support leg 24 may be made of a 50mm steel plate according to design. In this embodiment, the size, position, etc. of each component of the welding device can be adjusted appropriately according to the specification of the fixed electric reciprocating pump body 1 to meet the welding requirement.
Example 2:
based on embodiment 1 a repair technology of electronic reciprocal pump body water tank crackle welding set of wheel dephosphorization for the welding repair of electronic reciprocal pump body water tank crackle, welding set carries out the log production according to the model size of the electronic reciprocal pump body 1 that treats the restoration, sets up V type groove 7 along the electronic reciprocal pump body 1 water tank crackle earlier, then erects base 2, places the electronic reciprocal pump body 1 at base 21 to side back joint fixed steel sheet 4 and two fixed arm-tie 5 of bevel face are installed respectively in the front and back of base 21, ensure to treat that the welding repaired water tank crackle is located between two fixed arm-tie 5 of bevel face, install the clamp plate 3 at last and implement the welding after fixing electronic reciprocal pump body 1, the step is as follows:
step one, preparing before welding;
1.1, welding equipment: HT400D digital control inversion type manual direct current welding machine, wherein welding materials adopt Z308 welding rods with the diameter of 3.2mm and the diameter of 4.0mm, and the welding rods are baked for 2 hours at the temperature of 200-250 ℃ and then are kept at constant temperature and taken at any time;
1.2, welding position: vertical welding;
1.3, cleaning before welding: the welding position area and the welding rod are not required to have oil stain, an oxide layer, moisture and the like, the metallic luster is exposed, oxyacetylene flame is used for removing the moisture and the oil inside and outside the groove, and then the groove is polished by using abrasive cloth or a grinding wheel machine for derusting;
1.4, welding requirement: the single-side welding and double-side forming welding technology is adopted, and a surfacing layer fuses base materials to prevent white spots and hardening tissues;
1.5, weldment material: casting iron;
1.6, auxiliary facilities: a heat-preserving barrel, a sample plate, a temperature measuring instrument, a magnifier and heat-preserving cotton. Face mask, gloves, scarfing cinder hammer, chisel, file, wire brush, abrasive paper, steel ruler, level bar, activity wrench, straight mill, angle grinder. Wire cutters, hacksaw blades, labor protection items (work clothes, shoes, hats, planoscopes);
1.7, welding parameters: determining welding parameters according to welding equipment, welding materials and welding requirements;
manual shielded metal arc welding process parameters
Step two, welding and repairing;
considering the particularity of welding repair of ferrous metal cast iron materials of the water tank of the electric reciprocating pump body 1, before backing welding of the first layer, uniformly preheating the V-shaped groove 7 and two sides of the V-shaped groove to reach a preheating temperature of about 350 ℃, wherein oxygen-acetylene flame, gas heating or an electric heater can be used for roasting, and the temperature is required to rise uniformly during preheating so as to avoid nonuniform high-temperature heating to cause microcracks in the parent metal; then, welding a bottom layer, wherein welding is carried out along the same direction of a crack from bottom to top, the welding rod adopts a regular triangle strip conveying method, an included angle of 60-90 degrees is formed between the welding rod and the vertical surface of a welding seam, and arc extinguishing operation is adopted for achieving the double-sided forming of single-sided welding due to the fact that the groove gaps are different in size; after the welding of the bottom layer is finished, the welding meat is hammered by an air shovel to be uniformly distributed with small pits, so that crystal grains can be elongated, the structure is compact, partial welding stress is eliminated, and then the welding seam is ensured to have no welding defect through visual inspection and detection of a 5-time magnifier; the filling layer and the cover layer adopt a multilayer and multi-pass welding method, in order to reduce heat loss and prevent an operator from being irradiated by high temperature, the rest parts except the welding part are covered by asbestos plates or other heat insulation materials, and meanwhile, welding is not carried out in a place with cross wind; when the filling layer and the cover surface layer are welded, the welding rod is used for carrying out straight line or small-circle-drawing conveying, welding is carried out by adopting a medium arc length of 5-8 mm, each section of welding line is not longer, one section of welding line is generally 100-150mm, each section of welding line is welded, the welding meat is hammered by using a pneumatic shovel immediately to enable the welding meat to be uniformly distributed with small pits, crystal grains are elongated, the structure is compact, part of welding stress is eliminated, then the welding meat on the upper surface of the welding path is polished by using a grinding wheel, the temperature between layers is controlled to be optimal but can not be lower than 250 ℃, and then the next section is welded; each layer of the filling layer and the cover surface layer needs to be detected to ensure that no welding defect exists, after welding is completed, the water tank of the electric reciprocating pump body 1 is uniformly heated to 650-900 ℃ at a speed of 150 DEG/h to reduce the hardening degree and avoid embrittlement, then the box body is covered by a heat-insulating cotton bale and slowly cooled to room temperature, finally the welded box body is machined to meet the assembly size, the requirements of installation of the whole cast iron box body and other rolling assemblies and die holders are completely met through on-site actual sample plate inspection and acceptance, delivery and use are realized, and the mechanical performance using effect is achieved through periodic wheel dephosphorization rolling operation inspection.
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 (9)
1. The utility model provides an electronic reciprocal pump body water tank crack welding set of wheel dephosphorization, its characterized in that, it includes base (2), can dismantle perpendicularly and set up back connection fixed steel sheet (4) at base (2) upper surface rear side, can dismantle perpendicularly respectively that the interval sets up two bevel face fixed arm-tie (5) at base (2) upper surface front side and with back connection fixed steel sheet (4) and two bevel face fixed arm-tie (5) can dismantle perpendicularly respectively and connect fixed top board (3).
2. The crack welding device for the water tank of the wheel dephosphorization electric reciprocating pump body according to the claim 1, characterized in that the base (2) comprises a bottom plate (21) and a plurality of supporting feet (22) arranged at the bottom of the bottom plate (21).
3. The wheel dephosphorization electric reciprocating pump body water tank crack welding device according to claim 2, characterized in that the upper pressure plate (3) and the back connection fixing steel plate (4) and the upper ends of the two bevel face fixing pulling plates (5) as well as the bottom plate (21) and the back connection fixing steel plate (4) and the lower ends of the two bevel face fixing pulling plates (5) are fixedly connected through bolts (6).
4. The device for welding the cracks on the water tank of the wheel dephosphorization electric reciprocating pump body according to the claim 2 or 3, characterized in that a plurality of triangular fixing plates (23) are welded between the supporting legs (22) and the bottom plate (21).
5. The wheel dephosphorization electric reciprocating pump body water tank crack welding device according to claim 4, characterized in that a pump body supporting foot (24) is further arranged on the bottom plate (21).
6. The device for welding the cracks of the water tank of the wheel dephosphorization electric reciprocating pump body according to claim 4, wherein the upper pressure plate (3) and the bottom plate (21) are further provided with a limiting hole (7) and/or a limiting groove (8).
7. The repair process of the water tank crack welding device for the wheel dephosphorization electric reciprocating pump body based on any one of claims 1-6 is used for welding and repairing the water tank crack of the electric reciprocating pump body, and is characterized in that a V-shaped groove (7) is formed along the water tank crack of the electric reciprocating pump body (1), then a base (2) is erected, the electric reciprocating pump body (1) is placed on the base (21), a back connection fixing steel plate (4) and two slope surface fixing pull plates (5) are respectively installed on the front side and the back side of the base (21), the water tank crack to be welded and repaired is ensured to be located between the two slope surface fixing pull plates (5), and finally the upper pressing plate (3) is installed to fix the electric reciprocating pump body (1) and then welding is carried out, and the steps are as follows:
step one, preparing before welding;
1.1), welding equipment: the HT400D digital control inversion type manual direct current welding machine is characterized in that a Z308 welding rod is adopted as a welding material, and the welding rod is baked for 2 hours at the temperature of 200-250 ℃ and then is kept at a constant temperature and taken at any time;
1.2), welding position: vertical welding;
1.3), cleaning before welding: removing water and oil inside and outside the groove by using oxyacetylene flame, and then polishing and derusting by using a sand cloth or a grinding wheel machine;
1.4), welding requirements: the single-side welding and double-side forming welding technology is adopted, and a surfacing layer fuses base materials to prevent white spots and hardening tissues;
1.5), weldment material: casting iron;
1.6), auxiliary facilities: a heat-preserving barrel, a sample plate, a temperature measuring instrument, a magnifier and heat-preserving cotton. Face mask, gloves, scarfing cinder hammer, chisel, file, wire brush, abrasive paper, steel ruler, level bar, activity wrench, straight mill, angle grinder. Wire cutters, hacksaw blades, labor protection supplies;
1.7), welding parameters: determining welding parameters according to welding equipment, welding materials and welding requirements;
step two, welding and repairing;
considering the particularity of welding repair of ferrous metal cast iron materials of a water tank of an electric reciprocating pump body (1), uniformly preheating a V-shaped groove (7) and two sides of the V-shaped groove to reach a preheating temperature, then welding a bottom layer, performing welding along the same direction of a crack from bottom to top, adopting a regular triangle strip conveying method for welding rods, forming an included angle of 60-90 degrees between the welding rods and a vertical surface of a welding seam, adopting arc extinguishing operation to achieve single-side welding and double-side forming, adopting an air shovel to hammer welding meat after the welding of the bottom layer is finished, uniformly distributing small pits, and detecting to ensure that the welding seam does not have any welding defects; the filling layer and the cover surface layer adopt a multilayer and multi-pass welding method, in order to reduce heat loss and prevent an operator from being radiated by high temperature, the rest parts except the welding part are covered by heat insulation materials, welding rods are used for carrying out linear or small circle type strip conveying, welding is carried out by adopting a medium arc length of 5-8 mm, the welding seam of each section is not suitable to be overlong, each section is welded, the welding meat is hammered by a pneumatic shovel immediately to be welded, small pockmarks are uniformly distributed in the welding meat, then the welding meat on the upper surface of the welding bead is polished by a grinding wheel, the interlayer temperature is controlled to be not lower than 250 ℃, and then the next section is; each layer of the filling layer and the cover surface layer needs to be detected to ensure that no welding defect exists, after welding is completed, the temperature of a water tank of the electric reciprocating pump body (1) is uniformly raised to 650-900 ℃ at a speed of 150 DEG/h, then the box body is covered by a heat-preservation cotton bundle to be slowly cooled to room temperature, finally the box body which is welded is machined to meet the assembly size, and the box body is delivered for use after being detected to be qualified.
8. The repair process of the wheel dephosphorization electric reciprocating pump body water tank crack welding device as claimed in claim 7, wherein a Z308 welding rod with the diameter of 3.2mm is adopted as a base layer, the welding current is 80-95A, the voltage is 22 +/-1V, and the welding speed is 15 +/-1 cm/min; the filling layer and the cover layer adopt a Z308 welding rod with phi of 4.0mm, the welding current is 90-130A, the voltage is 23 +/-1V, and the welding speed is 15 +/-1 cm/min.
9. The repair process of the water tank crack welding device of the wheel dephosphorization electric reciprocating pump body according to claim 7, characterized in that oxygen-acetylene flame, gas heating or electric heater is adopted for baking before the first layer of backing welding, and the two sides of the groove are preheated to 350 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114393340A (en) * | 2022-01-28 | 2022-04-26 | 安徽马钢设备检修有限公司 | Welding process for crack of large pump body shell |
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| CN101543926A (en) * | 2009-05-08 | 2009-09-30 | 常州海杰冶金机械制造有限公司 | Overlaying welding technology of ductile cast iron roller |
| CN201776604U (en) * | 2010-02-05 | 2011-03-30 | 长春轨道客车股份有限公司 | Device for mounting and dismounting axle box nodes |
| CN202726355U (en) * | 2012-06-14 | 2013-02-13 | 青岛四机宏达工贸有限公司 | Welding tool for drain tank device bottom frame of high-speed electric multiple units |
| CN204221246U (en) * | 2014-09-18 | 2015-03-25 | 深圳市光大激光科技股份有限公司 | Square power battery vertical position welding fixture |
| CN105728963A (en) * | 2014-12-09 | 2016-07-06 | 重庆金国凯畅机床厂 | Repair welding technology for grey cast iron |
| CN205393906U (en) * | 2016-02-19 | 2016-07-27 | 何西常 | Multi -functional portable welding jig |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114393340A (en) * | 2022-01-28 | 2022-04-26 | 安徽马钢设备检修有限公司 | Welding process for crack of large pump body shell |
| CN114393340B (en) * | 2022-01-28 | 2023-08-22 | 安徽马钢设备检修有限公司 | Welding process for cracking part of large pump body shell |
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| CN112935472B (en) | 2022-06-03 |
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