CN113560698A - Double-head cantilever crane car welding process - Google Patents
Double-head cantilever crane car welding process Download PDFInfo
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- CN113560698A CN113560698A CN202110906855.0A CN202110906855A CN113560698A CN 113560698 A CN113560698 A CN 113560698A CN 202110906855 A CN202110906855 A CN 202110906855A CN 113560698 A CN113560698 A CN 113560698A
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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
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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
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Abstract
The invention relates to the technical field of welding, in particular to a double-head cantilever crane welding process, which aims at solving the problems that the existing welding process is mostly carried out manually, welding points are not fine enough, welding specifications are difficult to reach the same, manual welding has larger errors and low yield, and welding temperature in the welding process and toxic gas generated in the welding process can cause certain damage to human bodies, and the following scheme is proposed, wherein the welding process comprises the following steps: s1: process preparation, S2: trial welding inspection, S3: welding is performed, and S4: the welding is finished, the aim of the invention is to perform trial welding before welding, improve the welding accuracy, reduce the economic loss caused by welding errors, simultaneously perform welding by adopting a double-head cantilever crane, perform multi-pass welding simultaneously, perform welding by a machine, avoid the damage to a human body in the welding process, improve the yield and keep the welding specification in high consistency.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a double-head cantilever crane welding process.
Background
The electric welding is an economical, applicable and technically advanced method in material connection processing, almost any two metal materials and some non-metal materials can be welded by the electric welding, and a large-scale, economical and reasonable structure can be manufactured by small splicing. Nowadays, electric welding is widely used in various industrial departments such as machinery, electronics, buildings, ships, aerospace, energy and the like.
However, most of the existing welding processes are carried out manually, welding points are not fine enough, welding specifications are difficult to achieve the same, manual welding has large errors, the yield is low, and welding temperature and toxic gas generated in the welding process can cause certain damage to human bodies.
Therefore, we propose a double-head cantilever crane welding process to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems that the existing welding process is mostly carried out manually, welding points are not fine enough, welding specifications are difficult to achieve the same, manual welding has large errors and low yield, and welding temperature and toxic gas generated in the welding process can cause certain damage to human bodies.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-head cantilever crane welding process comprises the following steps:
s1: preparation of the process: preparing a welding groove, a welding wire, a welding flux and a double-head cantilever crane before welding;
s2: and (3) trial welding inspection: before welding, a double-head cantilever crane is used for trial welding and correcting errors;
s3: and (3) welding: operating the double-head cantilever crane to weld and constantly paying attention to the residual quantity of the welding flux;
s4: and (3) completing welding: after welding, checking whether the welding groove meets the standard or not and cleaning and polishing the welding groove;
preferably, in S1, before the welding machine starts welding, whether the flux is filled, the flux is dried in advance, and the welding machine is preheated before welding, the preheating before welding is executed strictly according to WPS or PWI, whether the welding equipment and welding material meet the requirements and the power supply performance of the newly installed equipment are checked, and the welding machine is grounded, and the welding groove and the edge thereof are degreased, oxidized skin, rust and moisture within 150mm, wherein the degreasing adopts a fire drying method, the steel wire ball is used for polishing until the unoxidized part of the groove is exposed during the degreasing, a grinding wheel is used for derusting, or a single piece of sand blasting and acid washing are used for derusting, the oxidation and the degreasing are performed, wherein the rust on the welding wire is wiped off by using a diluted sulfuric acid solution, the rust on the welding wire is removed by using a high-temperature antioxidant, and the welding wire is wiped off by a manual work to remove the oil, the front and rear machine head sliding plates of the two welding machines need to be adjusted to the middle position, so that the sliding plates can be adjusted up and down, front and back, left and right, the front machine head is adjusted to align with a welding line after the machine head of the welding machine enters the barrel, the rear machine head is manually adjusted to align with the other welding line through a pulley on the arm frame vehicle, and the front and rear machine heads respectively adjust the distance from a conductive nozzle to a groove;
preferably, in S2, a trial welding is performed before welding, a waste material similar to the welding point is used in the trial welding process, whether the trial welding result meets the required welding specification is compared, if the trial welding result meets the required welding specification, the next step is performed, and if the trial welding result does not meet the required welding specification, the head and the welding line of the welding machine are debugged, and the next step is performed until the trial welding result meets the required welding specification, wherein the welding specification is that the welding point must have a smooth surface, gloss, no burr, no dirt, no gap, and tight bonding between the welding flux and the welding flux;
preferably, in S3, the remaining amount of the flux is noticed at any time during the welding process, if the flux is insufficient, the flux needs to be supplemented in time, the supplemented flux needs to be consistent with the original flux specification, two welding machines arc simultaneously, and the welding of the bottom layer, the filling layer and the cover layer is performed synchronously, so as to ensure the synchronism of the welding, and adjust the welding speed at which the fixed cylinder rotates, ensure the welding quality by adjusting the current and voltage of the front and rear machine heads, if the welding needs to be stopped due to equipment failure and welding defect during the welding process, the other welding machine needs to be stopped synchronously, the welding is started simultaneously after the problem is solved, and two adjacent seams or a seam separated from one seam can be welded simultaneously, and when the number of welding seams of the two machine heads cannot be unified, the one with the small number of welding tracks needs to wait;
preferably, in S4, after welding, the welding machine and the welding slag remaining in the welding seam are manually cleaned, the joint is ground to reduce the concentrated stress, and a welding record and a process card are filled, where the filling content of the welding record includes welding temperature, welding material, raw materials of welding flux, the number of welding tracks and the size of the welding seam, and the filling content of the process card is the whole welding process step.
Compared with the prior art, the invention has the beneficial effects that:
1. trial welding is performed before welding, so that the welding accuracy is improved, the economic loss caused by welding errors is reduced, and the yield is increased.
2. The double-head cantilever crane is adopted for welding, multiple welding can be simultaneously carried out, and the welding is carried out by a machine, so that the harm to a human body in the welding process is avoided.
The invention aims to increase the welding accuracy and reduce the economic loss caused by welding errors by trial welding before welding, and meanwhile, the double-head cantilever crane is adopted for welding, so that multiple welding can be simultaneously carried out, the welding is carried out by a machine, the harm to a human body in the welding process is avoided, the yield is improved, and the welding specifications can be kept highly consistent.
Drawings
Fig. 1 is a flow chart of a welding process of a double-head jib crane according to the present invention.
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.
Example one
Referring to fig. 1, a double-head cantilever crane welding process includes the following steps:
s1: preparation of the process: preparing a welding groove, a welding wire, a welding flux and a double-head cantilever crane before welding, checking whether the welding flux is full or not before a welding machine starts to weld, drying the welding flux in advance, carrying out pre-welding preheating which is executed strictly according to WPS or procedure operation instruction PWI, checking whether welding equipment and welding materials meet requirements and the power supply performance of newly-installed equipment, simultaneously carrying out degreasing, oxide skin, rust and moisture operations on the welding groove and the edge thereof within 150mm by using a grounding wire of the welding machine, wherein the degreasing adopts a fire drying method, a steel wire ball is used for polishing until the unoxidized part of the groove is exposed during the degreasing, a grinding wheel brush is used for the degreasing, or a sand blasting single piece and an acid washing are carried out, the rust removing, the oxidation removing and the oil removing are carried out on the welding wire, wherein the rusty part of the welding wire is wiped by using a diluted sulfuric acid solution, the rust on the welding wire is removed, a high-temperature antioxidant is used for the degreasing, manually wiping the welding wire to remove oil stains, adjusting front and rear head sliding plates of the two welding machines to be in the middle position to ensure that the sliding plates can be adjusted up and down, front and back, left and right, and after the welding machine heads enter the barrel, adjusting the front machine heads to align with the welding line, manually adjusting the rear machine heads to align with the other welding line through a pulley on the cantilever crane vehicle, and adjusting the distance from the contact nozzle to the groove by the front machine heads and the rear machine heads respectively;
s2: and (3) trial welding inspection: before welding, a double-head cantilever crane is used for trial welding and correcting errors, trial welding is needed before welding, waste materials which are made of materials similar to welding points are adopted in the trial welding process, whether the trial welding results meet the required welding specification is compared, if the trial welding results meet the required welding specification, the next step is carried out, if the trial welding results do not meet the required welding specification, the machine head and the welding lines of the welding machine are debugged, and the next step is carried out until the trial welding results meet the required welding specification, wherein the welding specification is that the welding points must be smooth in surface, glossy, free of burrs, dirt and gaps, and the welding flux is tightly combined with the welding flux;
s3: and (3) welding: the method comprises the steps that a double-head cantilever crane is operated to weld, the residual quantity of a welding flux is noticed all the time, the residual quantity of the welding flux is noticed all the time in the welding process, if the residual quantity of the welding flux is insufficient, the supplementary welding flux needs to be supplemented in time, the specification of the supplementary welding flux is consistent with that of an original welding flux, two welding machines need to simultaneously start arcing, synchronous welding of a welding bottoming layer, a filling layer and a cover layer is achieved, the welding synchronism is guaranteed, the rotating welding speed of a fixed cylinder is adjusted, the welding quality is guaranteed by adjusting the current and the voltage of front and rear heads, if the welding needs to be stopped due to equipment faults and welding defects in the welding process, the other welding machine needs to synchronously stop welding, the welding is started at the same time after the problems are solved, two adjacent seams or a seam separated from one seam can be simultaneously welded, and when the welding seams of the two heads cannot achieve uniform welding, the condition that the number of the welding tracks is small is met;
s4: and (3) completing welding: after welding, checking whether the welding groove meets the standard or not, cleaning and polishing the welding groove, after welding, manually cleaning a residual welding machine and welding slag in a welding seam, polishing a joint to reduce concentrated stress, filling a welding record and a process card, wherein the filling content of the welding record is welding temperature, welding materials and welding flux, the number of welding tracks and the size of the welding seam, and the filling content of the process card is the whole welding process step.
Example two
Referring to fig. 1, a double-head cantilever crane welding process includes the following steps:
s1: preparation of the process: preparing a welding groove, a welding wire, a welding flux and a double-head cantilever crane before welding, checking whether the welding flux is full or not before a welding machine starts to weld, drying the welding flux in advance, carrying out pre-welding preheating which is executed strictly according to WPS or procedure operation instruction PWI, checking whether welding equipment and welding materials meet requirements and the power supply performance of newly-installed equipment, simultaneously carrying out degreasing, oxide skin, rust and moisture operations on the welding groove and the edge thereof within 150mm by using a grounding wire of the welding machine, wherein the degreasing adopts a fire drying method, a steel wire ball is used for polishing until the unoxidized part of the groove is exposed during the degreasing, a grinding wheel brush is used for the degreasing, or a sand blasting single piece and an acid washing are carried out, the rust removing, the oxidation removing and the oil removing are carried out on the welding wire, wherein the rusty part of the welding wire is wiped by using a diluted sulfuric acid solution, the rust on the welding wire is removed, a high-temperature antioxidant is used for the degreasing, manually wiping the welding wire to remove oil stains, adjusting front and rear head sliding plates of the two welding machines to be in the middle position to ensure that the sliding plates can be adjusted up and down, front and back, left and right, and after the welding machine heads enter the barrel, adjusting the front machine heads to align with the welding line, manually adjusting the rear machine heads to align with the other welding line through a pulley on the cantilever crane vehicle, and adjusting the distance from the contact nozzle to the groove by the front machine heads and the rear machine heads respectively;
s2: and (3) welding: the method comprises the steps that a double-head cantilever crane is operated to weld, the residual quantity of a welding flux is noticed all the time, the residual quantity of the welding flux is noticed all the time in the welding process, if the residual quantity of the welding flux is insufficient, the supplementary welding flux needs to be supplemented in time, the specification of the supplementary welding flux is consistent with that of an original welding flux, two welding machines need to simultaneously start arcing, synchronous welding of a welding bottoming layer, a filling layer and a cover layer is achieved, the welding synchronism is guaranteed, the rotating welding speed of a fixed cylinder is adjusted, the welding quality is guaranteed by adjusting the current and the voltage of front and rear heads, if the welding needs to be stopped due to equipment faults and welding defects in the welding process, the other welding machine needs to synchronously stop welding, the welding is started at the same time after the problems are solved, two adjacent seams or a seam separated from one seam can be simultaneously welded, and when the welding seams of the two heads cannot achieve uniform welding, the condition that the number of the welding tracks is small is met;
s3: and (3) completing welding: after welding, checking whether the welding groove meets the standard or not, cleaning and polishing the welding groove, after welding, manually cleaning a residual welding machine and welding slag in a welding seam, polishing a joint to reduce concentrated stress, filling a welding record and a process card, wherein the filling content of the welding record is welding temperature, welding materials and welding flux, the number of welding tracks and the size of the welding seam, and the filling content of the process card is the whole welding process step.
EXAMPLE III
Referring to fig. 1, a double-head cantilever crane welding process includes the following steps:
s1: preparation of the process: preparing a welding groove, a welding wire, a welding flux and a double-head cantilever crane before welding, wherein the welding machine needs to check whether the welding flux is full before welding, the welding flux needs to be dried in advance and needs to be preheated before welding, the preheating before welding needs to be executed strictly according to WPS or procedure operation instruction PWI, whether welding equipment and welding materials meet requirements and the power supply performance of newly-installed equipment are checked, meanwhile, a welding machine needs a grounding wire, front and rear head sliding plates of the two welding machines need to be adjusted to the middle position, the sliding plates are ensured to be adjusted up and down, front and back and left and right, the front head is adjusted to align the welding line after the welding machine head enters a cylinder, the rear head is manually adjusted to align to the other welding line through a pulley on the cantilever crane, and the front head and the rear head respectively adjust the distance from a conductive nozzle to the groove;
s2: and (3) trial welding inspection: before welding, a double-head cantilever crane is used for trial welding and correcting errors, trial welding is needed before welding, waste materials which are made of materials similar to welding points are adopted in the trial welding process, whether the trial welding results meet the required welding specification is compared, if the trial welding results meet the required welding specification, the next step is carried out, if the trial welding results do not meet the required welding specification, the machine head and the welding lines of the welding machine are debugged, and the next step is carried out until the trial welding results meet the required welding specification, wherein the welding specification is that the welding points must be smooth in surface, glossy, free of burrs, dirt and gaps, and the welding flux is tightly combined with the welding flux;
s3: and (3) welding: the method comprises the steps that a double-head cantilever crane is operated to weld, the residual quantity of a welding flux is noticed all the time, the residual quantity of the welding flux is noticed all the time in the welding process, if the residual quantity of the welding flux is insufficient, the supplementary welding flux needs to be supplemented in time, the specification of the supplementary welding flux is consistent with that of an original welding flux, two welding machines need to simultaneously start arcing, synchronous welding of a welding bottoming layer, a filling layer and a cover layer is achieved, the welding synchronism is guaranteed, the rotating welding speed of a fixed cylinder is adjusted, the welding quality is guaranteed by adjusting the current and the voltage of front and rear heads, if the welding needs to be stopped due to equipment faults and welding defects in the welding process, the other welding machine needs to synchronously stop welding, the welding is started at the same time after the problems are solved, two adjacent seams or a seam separated from one seam can be simultaneously welded, and when the welding seams of the two heads cannot achieve uniform welding, the condition that the number of the welding tracks is small is met;
s4: and (3) completing welding: after welding, checking whether the welding groove meets the standard or not, cleaning and polishing the welding groove, after welding, manually cleaning a residual welding machine and welding slag in a welding seam, polishing a joint to reduce concentrated stress, filling a welding record and a process card, wherein the filling content of the welding record is welding temperature, welding materials and welding flux, the number of welding tracks and the size of the welding seam, and the filling content of the process card is the whole welding process step.
Example four
Referring to fig. 1, a double-head cantilever crane welding process includes the following steps:
s1: preparation of the process: preparing a welding groove, a welding wire, a welding flux and a double-head cantilever crane before welding, checking whether the welding flux is full or not before a welding machine starts to weld, drying the welding flux in advance, carrying out pre-welding preheating which is executed strictly according to WPS or procedure operation instruction PWI, checking whether welding equipment and welding materials meet requirements and the power supply performance of newly-installed equipment, simultaneously carrying out degreasing, oxide skin, rust and moisture operations on the welding groove and the edge thereof within 150mm by using a grounding wire of the welding machine, wherein the degreasing adopts a fire drying method, a steel wire ball is used for polishing until the unoxidized part of the groove is exposed during the degreasing, a grinding wheel brush is used for the degreasing, or a sand blasting single piece and an acid washing are carried out, the rust removing, the oxidation removing and the oil removing are carried out on the welding wire, wherein the rusty part of the welding wire is wiped by using a diluted sulfuric acid solution, the rust on the welding wire is removed, a high-temperature antioxidant is used for the degreasing, manually wiping the welding wire to remove oil stains, adjusting front and rear head sliding plates of the two welding machines to be in the middle position to ensure that the sliding plates can be adjusted up and down, front and back, left and right, and after the welding machine heads enter the barrel, adjusting the front machine heads to align with the welding line, manually adjusting the rear machine heads to align with the other welding line through a pulley on the cantilever crane vehicle, and adjusting the distance from the contact nozzle to the groove by the front machine heads and the rear machine heads respectively;
s2: and (3) trial welding inspection: before welding, a double-head cantilever crane is used for trial welding and correcting errors, trial welding is needed before welding, waste materials which are made of materials similar to welding points are adopted in the trial welding process, whether the trial welding results meet the required welding specification is compared, if the trial welding results meet the required welding specification, the next step is carried out, if the trial welding results do not meet the required welding specification, the machine head and the welding lines of the welding machine are debugged, and the next step is carried out until the trial welding results meet the required welding specification, wherein the welding specification is that the welding points must be smooth in surface, glossy, free of burrs, dirt and gaps, and the welding flux is tightly combined with the welding flux;
s3: and (3) welding: the method comprises the steps that a double-head cantilever crane is operated to weld, the residual quantity of a welding flux is noticed all the time, the residual quantity of the welding flux is noticed all the time in the welding process, if the residual quantity of the welding flux is insufficient, the supplementary welding flux needs to be supplemented in time, the specification of the supplementary welding flux is consistent with that of an original welding flux, two welding machines need to simultaneously start arcing, synchronous welding of a welding bottoming layer, a filling layer and a cover layer is achieved, the welding synchronism is guaranteed, the rotating welding speed of a fixed cylinder is adjusted, the welding quality is guaranteed by adjusting the current and the voltage of front and rear heads, if the welding needs to be stopped due to equipment faults and welding defects in the welding process, the other welding machine needs to synchronously stop welding, the welding is started at the same time after the problems are solved, two adjacent seams or a seam separated from one seam can be simultaneously welded, and when the welding seams of the two heads cannot achieve uniform welding, the condition that the number of the welding tracks is small is met;
s4: and (3) completing welding: and after welding is finished, whether the welding groove meets the standard or not is checked, the welding groove is cleaned and polished, residual welding machines and welding slag in the welding seams are manually cleaned after welding is finished, and joints are polished to reduce concentrated stress.
EXAMPLE five
Referring to fig. 1, a double-head cantilever crane welding process includes the following steps:
s1: preparation of the process: preparing a welding groove, a welding wire, a welding flux and a double-head cantilever crane before welding, checking whether the welding flux is full or not before a welding machine starts to weld, drying the welding flux in advance, carrying out pre-welding preheating which is executed strictly according to WPS or procedure operation instruction PWI, checking whether welding equipment and welding materials meet requirements and the power supply performance of newly-installed equipment, simultaneously carrying out degreasing, oxide skin, rust and moisture operations on the welding groove and the edge thereof within 150mm by using a grounding wire of the welding machine, wherein the degreasing adopts a fire drying method, a steel wire ball is used for polishing until the unoxidized part of the groove is exposed during the degreasing, a grinding wheel brush is used for the degreasing, or a sand blasting single piece and an acid washing are carried out, the rust removing, the oxidation removing and the oil removing are carried out on the welding wire, wherein the rusty part of the welding wire is wiped by using a diluted sulfuric acid solution, the rust on the welding wire is removed, a high-temperature antioxidant is used for the degreasing, manually wiping the welding wire to remove oil stains, adjusting front and rear head sliding plates of the two welding machines to be in the middle position to ensure that the sliding plates can be adjusted up and down, front and back, left and right, and after the welding machine heads enter the barrel, adjusting the front machine heads to align with the welding line, manually adjusting the rear machine heads to align with the other welding line through a pulley on the cantilever crane vehicle, and adjusting the distance from the contact nozzle to the groove by the front machine heads and the rear machine heads respectively;
s2: and (3) trial welding inspection: before welding, a double-head cantilever crane is used for trial welding and correcting errors, trial welding is needed before welding, waste materials which are made of materials similar to welding points are adopted in the trial welding process, whether the trial welding results meet the required welding specification is compared, if the trial welding results meet the required welding specification, the next step is carried out, if the trial welding results do not meet the required welding specification, the machine head and the welding lines of the welding machine are debugged, and the next step is carried out until the trial welding results meet the required welding specification, wherein the welding specification is that the welding points must be smooth in surface, glossy, free of burrs, dirt and gaps, and the welding flux is tightly combined with the welding flux;
s3: and (3) welding: two welding machines need to simultaneously strike arcs, synchronously weld a bottoming layer, a filling layer and a cover layer, ensure the welding synchronism, and adjust the welding speed for fixing the rotation of the cylinder, ensure the welding quality by adjusting the current and the voltage of front and rear machine heads, if the welding needs to be stopped due to equipment faults and welding defects in the welding process, the other welding machine needs to synchronously stop welding, and simultaneously start welding after solving the problems, and two adjacent seams or a separated seam can be simultaneously welded, when the welding seams of the two machine heads can not realize uniform welding tracks, the one with less welding tracks needs to wait;
s4: and (3) completing welding: and after welding is finished, whether the welding groove meets the standard or not is checked, the welding groove is cleaned and polished, residual welding machines and welding slag in the welding seams are manually cleaned after welding is finished, and joints are polished to reduce concentrated stress.
The test of the welding process of the double-head cantilever crane in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment shows that the following results are obtained:
compared with the prior art, the welding process of the double-head cantilever crane in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment is obviously improved, and the first embodiment is the best embodiment.
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 person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A double-head cantilever crane welding process is characterized by comprising the following steps:
s1: preparation of the process: preparing a welding groove, a welding wire, a welding flux and a double-head cantilever crane before welding;
s2: and (3) trial welding inspection: before welding, a double-head cantilever crane is used for trial welding and correcting errors;
s3: and (3) welding: operating the double-head cantilever crane to weld and constantly paying attention to the residual quantity of the welding flux;
s4: and (3) completing welding: and after welding, checking whether the welding groove meets the standard or not, and cleaning and polishing the welding groove.
2. The dual head boom truck welding process of claim 1, wherein in S1, before welding, the welder checks whether the flux is full, the flux is dried in advance, and pre-weld preheating is performed, wherein the pre-weld preheating is performed according to the procedure, the welding equipment, the welding material and the new installation equipment power supply are checked to be in compliance, and the welder needs to be grounded.
3. The twin-head boom car welding process of claim 1, wherein in S1, the welding groove and its edge are degreased, oxidized skin, rust, moisture are removed within 150mm, wherein the degreasing is performed by fire drying, the degreasing is performed by using a steel wire ball to polish until the unoxidized part of the groove is exposed, the derusting is performed by using a grinding wheel brush or performing single-piece sand blasting and acid washing, the welding wire is subjected to derusting, oxidation removal and degreasing, wherein the rusted part of the welding wire is wiped by using a diluted sulfuric acid solution to remove the rust on the welding wire, the high-temperature antioxidant is used to remove the oxidation, and the welding wire is manually wiped to remove the oil stain.
4. The double-head cantilever crane welding process of claim 1, wherein in S1, the front and rear head sliding plates of the two welding machines are required to be adjusted to a middle position to ensure that the sliding plates can be adjusted up and down, front and back, left and right, and the front head is adjusted to align with the welding seam first after the welding machine head enters the cylinder, the rear head is manually adjusted to align with the other welding seam through a pulley on the cantilever crane, and the front and rear heads respectively adjust the distance from the contact nozzle to the groove.
5. The dual-head jib vehicle welding process of claim 1, wherein in S2, a trial welding is performed before welding, a waste material similar to the welding point is used in the trial welding process, whether the trial welding result meets the required welding specification is compared, if the trial welding result meets the required welding specification, the next step is performed, and if the trial welding result does not meet the required welding specification, the next step is performed until the trial welding result meets the required welding specification, wherein the welding specification is that the welding point must have a smooth surface, gloss, no burr, no dirt, no gap, and tight bonding of the welding flux and the welding flux.
6. The double-head jib carriage welding process of claim 1 wherein in step S3, the residual amount of flux is noticed at any time during welding, and if the residual amount of flux is insufficient, the flux needs to be supplemented in time, and the supplemented flux needs to be in accordance with the specification of the original flux.
7. The welding process of claim 1, wherein in step S3, two welding machines arc simultaneously, weld the bottom layer, the filling layer, and the cover layer simultaneously, and adjust the welding speed of the fixed cylinder, and ensure the welding quality by adjusting the current and voltage of the front and rear heads, if the welding process needs to be stopped due to equipment failure and welding defect, the other welding machine needs to stop welding synchronously, and then start welding simultaneously after solving the problem, and two adjacent seams or a seam separated by one seam can be welded simultaneously, and when the welding seams of the two heads cannot achieve uniform welding tracks, the one with a small number of welding tracks needs to wait.
8. The double-head jib carriage welding process of claim 1 wherein in step S4, the residual welding machine and welding slag in the weld joint are cleaned manually after welding, the joint is ground to reduce the concentrated stress, and a welding record and a process card are filled, wherein the welding record is filled with welding temperature, welding material, raw materials of welding flux, number of welding tracks and size of weld joint, and the process card is filled with the whole welding process step.
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| Publication number | Priority date | Publication date | Assignee | Title |
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