CN112935477A - C-shaped material shed semi-portal beam butt-joint fixing assembly device and welding process - Google Patents
C-shaped material shed semi-portal beam butt-joint fixing assembly device and welding process Download PDFInfo
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- CN112935477A CN112935477A CN202110159950.9A CN202110159950A CN112935477A CN 112935477 A CN112935477 A CN 112935477A CN 202110159950 A CN202110159950 A CN 202110159950A CN 112935477 A CN112935477 A CN 112935477A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/28—Beams
Abstract
The invention discloses a C-shaped material shed semi-portal beam butt joint fixing assembly device which comprises a plurality of adjusting assembly tools which are arranged in sequence; each adjusting assembly tool comprises an H-shaped beam placing support formed by welding steel materials, and the middle part and two sides of the beam placing support are respectively provided with an up-down verticality adjusting device and a left-right levelness adjusting device; a horizontal line support is arranged at the top of one side of the cross beam placing support, and a horizontal measuring line is arranged at the top of the horizontal line support of the tool by a plurality of adjusting groups which are arranged in sequence. The invention also discloses a butt joint fixing assembly welding process for the C-shaped material shed semi-portal beam. By applying the device and the method, the C-shaped material shed semi-portal beam butt joint fixing assembly device and welding can be rapidly completed, the quality is ensured, the effect is improved, and the follow-up accurate assembly is guaranteed.
Description
Technical Field
The invention belongs to the technical field of welding equipment and welding processes, and relates to a C-shaped material shed semi-portal beam butt-joint fixing assembly device and a welding process.
Background
Half portal reclaimer is the reclaimer that the stock yard was used commonly, need install 8 half portal reclaimers like the one-time stock yard C type material shed engineering of horse steel stock yard environmental protection upgrading and intelligent transformation engineering, each half portal scraper reclaimer by scraper reclaimer portal, scrape arm cantilever beam, end beam, cantilever support, complete machine running gear, platform, wireless receiving device overhaul platform, staircase and railing, blowpit etc. and constitute. All steel structural members of each semi-portal scraper reclaimer complete portal, scraper cantilever, walkway, platform and ladder split manufacturing tasks in a factory according to drawing requirements, and the portal and the scraper cantilever are pre-assembled in the factory before shipment, and are transported to the site after assembly. The length of the semi-portal beam of the core equipment reaches about 40 meters, after two or three sections of prefabricated beam sections are transported to the site to be assembled by butt welding according to the technical requirements, each section of prefabricated beam section is in a box structure shape, the section size is 2000mm multiplied by 1200mm, the length is about 13000mm, and the site for installing raw materials has no same accurate butt assembly platform, if the on-site assembly levelness and verticality including expansion and contraction of butt welds cannot meet the size required by technical specifications, firstly, the large-sized cross beam cannot be installed in place, secondly, if the deformation is too large and scrapping is directly caused, aiming at the field condition, the invention needs to design a C-shaped shed semi-portal reclaimer beam butt joint fixing assembly device and a welding process to meet the welding of one-time assembly and fixed all-position welding seams on the field, the assembled and welded beam spare parts of the core C-shaped shed semi-portal material taking machine meet the matching requirement of large-scale equipment for accurate installation and operation.
Disclosure of Invention
Aiming at the problem that a C-shaped material shed semi-portal beam butt welding non-pairing platform exists in the background technology, the invention provides a C-shaped material shed semi-portal beam butt welding fixed pairing device and a welding process.
The technical scheme for solving the technical problem of the invention is as follows:
the invention relates to a C-shaped material shed semi-portal beam butt joint fixing assembly device, which comprises a plurality of adjusting assembly tools which are arranged in sequence; each adjusting assembly tool comprises an H-shaped beam placing support formed by welding steel materials, and the middle part and two sides of the beam placing support are respectively provided with an up-down verticality adjusting device and a left-right levelness adjusting device; a horizontal line support is arranged at the top of one side of the cross beam placing support, and a horizontal measuring line is arranged at the top of the horizontal line support of the tool by a plurality of adjusting groups which are arranged in sequence.
Further, the vertical verticality adjusting device comprises threaded holes formed in the left and right sides of steel in the middle of the H-shaped beam placing support, and a vertical verticality adjusting screw rod is vertically arranged in each threaded hole.
Furthermore, the left and right levelness adjusting device comprises threaded holes correspondingly formed in the upper parts of steel on the left and right sides of the H-shaped beam placing support, and left and right levelness adjusting screws are vertically arranged in each threaded hole.
Furthermore, the beam placing support is made of H-shaped steel.
Further, the horizontal line support is made of a steel pipe.
The invention relates to a C-shaped material shed semi-portal beam butt-joint fixing assembly welding process, wherein a C-shaped material shed semi-portal beam is of a box structure, a plurality of sections of semi-portal beam units are prefabricated in advance, grooves are formed in the end parts of the semi-portal beam units to be in butt joint, and the C-shaped material shed semi-portal beam butt-joint fixing assembly device is used for carrying out assembly welding through the technical scheme, and the steps are as follows:
step one, preparation before welding:
1.1, welding equipment is as follows: the WS-400T manual argon arc welding machine has the gas purity of more than or equal to 99.99 percent and the welding material is selected as a carbon steel welding wire ER 50-6; the Nb-500P digital pulse gas shielded welding machine is in direct current positive connection, the welding material is solid welding wire ER50-6, and the gas is argon and carbon dioxide;
1.2, welding position: symmetrically welding the all-position V-shaped grooves;
1.3, cleaning before welding: the welding position area and the welding wire do not have oil stain, an oxide layer, moisture and the like, the metal luster needs to be 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 technical requirements: one-side welding and two-side forming are carried out, a welding layer fuses base materials, and a welding seam cannot have any welding defects;
1.5, weldment material: Q355B;
1.6, groove size: a V-shaped groove;
1.7, auxiliary facilities: a level gauge, a sample plate, a magnifier, a face mask, gloves, a slag removal hammer, a chisel, a file, a wire brush, sand paper, a steel ruler, a level bar, a movable spanner, a straight grinder, an angle grinder, a wire pliers, a steel saw blade and labor protection articles;
8. welding technological parameters are as follows: determining welding parameters according to welding equipment, welding wire specifications and welding requirements;
step two, arranging a C-shaped material shed semi-portal beam butt joint fixing assembly device;
placing all adjusting assembly tools in sequence on a field site according to the specification of the C-shaped shed semi-portal beam, leveling all adjusting assembly tools by a level gauge, and then arranging horizontal measuring lines on all horizontal line supports to assemble the C-shaped shed semi-portal beam butt joint fixing assembly device; horizontally placing each section of semi-portal beam unit on the C-shaped shed semi-portal beam butt joint fixing assembly device in sequence, wherein grooves formed in the end parts, needing butt joint, of each semi-portal beam unit correspond to each other and are controlled within a specified gap range, then adjusting each semi-portal beam unit through an upper and lower verticality adjusting device and a left and right levelness adjusting device according to the levelness, verticality and heat expansion and cold contraction processes of welding seams of each semi-portal beam unit, measuring the integral levelness through a horizontal measuring line, and welding the butt joint grooves after all technical specifications and welding process requirements are met;
step three, welding the semi-portal beam unit;
1.1, welding sequence: the fixed box butt weld joint is divided into a flat weld joint at the upper part, an overhead weld joint at the lower part, a vertical weld joint at the left part and a vertical weld joint at the right part; before welding, all welding seams are subjected to assembly fixed section welding according to technical requirements and specifications, then the welding is carried out in a symmetrical mode, simultaneous symmetrical welding of a flat welding seam at the upper part and an upward welding seam at the lower part is carried out firstly, then simultaneous symmetrical welding of a vertical welding seam at the left part and a vertical welding seam at the right part is carried out, or simultaneous symmetrical welding of a vertical welding seam at the left part and a vertical welding seam at the right part is carried out firstly, and then simultaneous symmetrical welding of a flat welding seam at the upper part and an upward welding seam at the lower part is carried out;
1.2, welding process: before welding, removing impurities such as paint, rust and burrs in the range of 35-45 mm on two sides of the groove, exposing the metallic luster of the base metal, then performing assembly and segmented welding, and after all the components meet the requirement of dimensional accuracy, simultaneously and symmetrically welding according to the welding sequence of 1.1; the method comprises the following steps that a bottoming layer is subjected to manual argon arc welding through a WS-400T manual argon arc welding machine by adopting an ER50-6 welding wire, the end parts of box bodies on two sides are sealed during welding, the problem that poor argon protection is caused by cross-ventilation and welding defects of the inner part and the outer part are caused is solved, a magnifier of 5-10 times is adopted to see whether the welding defects of the inner part and the outer part exist after the bottoming layer is completely welded, the levelness and the verticality of an integral beam are detected, and if the welding sequence is adjusted in an overproof mode, the detected; after confirming that the bottoming layer has no defects, an ER50-6 solid welding wire is adopted by an Nb-500P digital pulse gas shielded welding machine for filling and welding the cover layer, the change of the angle of a welding gun is noticed in the welding process, the phenomenon that a welding seam is not fused is prevented, the cover layer is not too wide, the joint is in smooth transition, and undercut is prevented; after all welding is finished, the welding line is slowly cooled to room temperature by adopting a heat-preservation cotton bundle to the whole semi-portal beam assembly, the covering width is at least larger than 200mm of each of two sides of the welding line, the cooled welding line is polished on the surface of the welding line by adopting a manual angle grinder, the arc transition of the surface of the welding line is realized, then the welding quality is verified by flaw detection, and the field assembly verification is carried out after each lattice, so that all technical specifications are met, and the welding line is delivered for use.
Further, the parameters of manual argon arc welding of the bottom layer are as follows: the welding wire is ER50-6 with the model of phi 2.5mm, the welding current is 120-160A, the arc voltage is 23 +/-1V, and the welding speed is 15 +/-1 cm/min; the parameters of the carbon dioxide arc welding of the filling layer are as follows: the solid welding wire is ER50-6 with the model of phi 1.2mm, the welding current is 260-280A, the arc voltage is 26-28V, and the welding speed is average 90 g/min; the parameters of the carbon dioxide arc welding of the cover layer are as follows: the solid welding wire is ER50-6 with the model of phi 1.2mm, the welding current is 280-320A, the arc voltage is 28-32V, and the welding speed is 90-140 g/min.
Further, the angle of the V-groove is 30 ° ± 1.
Further, the method also comprises the control of the shrinkage of the welding seam, and in the welding process, when the shrinkage of the welding seam is found to be uneven, the welding seam is welded by adopting small current, small gap and narrow welding seam; during control, the manual argon arc welding current of the bottom layer is adjusted to be 60-90A, the carbon dioxide gas shielded welding current of the filling layer and the covering layer is adjusted to be 90-160A, and the narrow channel is 5-8 mm.
Furthermore, the gap between grooves formed in the end parts of the semi-portal beam units to be butted is 0.5-1.5 mm.
Further, the gas used by the Nb-500P digital pulse gas shielded welding machine is 80% argon and 20% carbon dioxide.
Further, in the case of symmetrical welding, the upper horizontal weld seam is welded by a left-hand welding method, the lower horizontal weld seam is welded by a right-hand welding method, and the left vertical weld seam and the right vertical weld seam are welded simultaneously from bottom to top.
Compared with the prior art, the C-shaped material shed semi-portal beam butt-joint fixing assembly device and the welding process have the advantages that the operation is safe and easy, the welding quality is stable, the investment cost is low, the actual field requirements are met, the working efficiency is high, and the field assembly cost is greatly reduced. In addition, the C-shaped material shed semi-portal beam butt-joint fixing assembly device and the welding process also provide scientific reference basis for butt-joint welding of other large-sized workpieces.
Drawings
FIG. 1 is a schematic structural diagram of a C-shaped material shed semi-portal beam butt joint fixing assembly during welding;
FIG. 2 is a schematic structural diagram of a C-shaped material shed semi-portal beam butt-joint fixing assembly device in the invention;
FIG. 3 is a schematic structural diagram of an adjusting assembly fixture according to the present invention;
in the figure: 1. a semi-portal beam unit; 2. a horizontal measurement line; 3. adjusting the assembly tool; 31. a crossbeam placing support; 32. adjusting screw rods vertically verticality; 33. a left and right levelness adjusting screw; 34. a horizontal line bracket; 4. and (4) beveling.
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.
Example 1:
as shown in fig. 1 to 3, the C-shaped material shed semi-portal beam butt-joint fixing assembly device comprises a plurality of adjusting assembly tools 3 which are arranged in sequence; each adjusting assembly fixture 3 comprises a beam placing support 31 which is formed by welding steel materials and is in an H shape and used for bearing a segmented semi-portal beam, the beam placing support 31 can be formed by welding H-shaped steel, and an upper and lower verticality adjusting device and a left and right levelness adjusting device are respectively arranged in the middle and at two sides of the beam placing support 31; the top of one side of the beam placing support 31 is provided with a horizontal line support 34, the horizontal line support 34 can be made of steel pipes, and the top of the horizontal line support 34 of the tool 3 is provided with a horizontal measuring line 2 by a plurality of adjusting groups which are arranged in sequence.
In this embodiment, the vertical adjusting device further includes threaded holes formed in the left and right sides of the steel material in the middle of the H-shaped beam placing support 31, a vertical adjusting screw 32 is vertically disposed in each threaded hole, and the two vertical adjusting screws 32 can freely adjust the vertical degree of the object placed on the beam placing support 31.
In this embodiment, the left and right levelness adjusting device is further configured to include threaded holes correspondingly formed in the upper portions of the steel on the left and right sides of the H-shaped beam placing support 31, a left and right levelness adjusting screw 33 is vertically arranged in each threaded hole, and the levelness of an object placed on the beam placing support 31 can be freely adjusted by the two left and right levelness adjusting screws 33.
Example 2:
the invention relates to a C-shaped material shed semi-portal beam butt-joint fixing assembly welding process, wherein a C-shaped material shed semi-portal beam is of a box structure, the cross section of the C-shaped material shed semi-portal beam is rectangular, a plurality of sections of semi-portal beam units 1 are prefabricated in advance, a groove 4 is formed in the end part, needing butt joint, of each semi-portal beam unit 1, the assembly welding is carried out through the C-shaped material shed semi-portal beam butt-joint fixing assembly device in embodiment 1, the embodiment takes the assembly welding of the two sections of semi-portal beam units 1 as an example, and the steps are as follows:
step one, preparation before welding:
1.1, welding equipment is as follows: the WS-400T manual argon arc welding machine has the gas purity of more than or equal to 99.99 percent and adopts carbon steel welding wire ER50-6 as a welding material; the Nb-500P digital pulse gas shielded welding machine is in direct current positive connection, the welding material is solid welding wire ER50-6, and the gas consists of 80% argon and 20% carbon dioxide;
1.2, welding position: symmetrically welding the all-position V-shaped grooves;
1.3, cleaning before welding: the welding position area and the welding wire do not have oil stain, an oxide layer, moisture and the like, the metal luster needs to be 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 technical requirements: one-side welding and two-side forming are carried out, a welding layer fuses base materials, and a welding seam cannot have any welding defects;
1.5, weldment material: Q355B;
1.6, groove size: a V-shaped groove with an angle of 30 +/-1 degrees;
1.7, auxiliary facilities: leveling instruments, templates, magnifying glasses, masks, gloves, slag hammers, chisels, files, wire brushes, sand paper, steel rulers, leveling rulers, movable spanners, straight grinders, angle grinders, wire pliers, steel saw blades, labor protection articles (work clothes, shoes, caps and plain glasses) and the like;
8. welding technological parameters are as follows: determining welding parameters according to welding equipment, welding wire specifications and welding requirements;
carbon dioxide arc welding
Manual argon arc welding
Step two, arranging a C-shaped material shed semi-portal beam butt joint fixing assembly device;
placing all adjusting group assembling tools 3 in sequence on a field site according to the specification of the C-shaped shed semi-portal beam, leveling all adjusting group assembling tools 3 by a level gauge, and arranging horizontal measuring lines 2 on all horizontal line supports 34 to assemble the C-shaped shed semi-portal beam butt-joint fixing group assembling device; horizontally placing each section of semi-portal beam unit 1 on the C-shaped shed semi-portal beam butt-joint fixing assembly device in sequence, wherein a groove 4 (the angle is 30 degrees) formed in the end part, needing butt joint, of each semi-portal beam unit 1 corresponds to the groove and is controlled within a gap range of 0.5-2.5 mm (preferably 0.5-1.5 mm), welding of two groups of butt-joint welding seams is facilitated, then adjusting each semi-portal beam unit 1 through an upper and lower verticality adjusting device and a left and right levelness adjusting device according to the levelness, verticality and thermal expansion and cold contraction process of each semi-portal beam unit 1, measuring the integral levelness through a horizontal measuring line 2, and welding the butt-joint groove 4 after all technical specifications and welding process requirements are met;
step three, welding the semi-portal beam unit 1;
1.1, welding sequence: the fixed box butt weld joint is divided into a flat weld joint at the upper part, an overhead weld joint at the lower part, a vertical weld joint at the left part and a vertical weld joint at the right part; before welding, all welding seams are assembled to a fixed section welding (the section welding seams and formal welding seams have the same welding process parameters, welding materials, single-side welding and double-side forming technical requirements and the like) according to technical requirements and specifications, then the welding is carried out in a symmetrical mode, the upper flat welding seam and the lower upward welding seam are symmetrically welded at the same time (two welding machines for two persons), then the left vertical welding seam and the right vertical welding seam are symmetrically welded at the same time (two welding machines for two persons), or the left vertical welding seam and the right vertical welding seam are symmetrically welded at the same time (two welding machines for two persons), then the upper flat welding seam and the lower upward welding seam are symmetrically welded at the same time (two welding machines for two persons), and the mode is reasonably selected according to the specific conditions on site and can be adjusted according to the requirements in the welding process;
1.2, welding process: before welding, removing impurities such as paint, rust and burrs within the range of 40mm on the two sides of the groove, exposing the metallic luster of the base metal, then performing assembly and segmented welding, and after all the components meet the requirement of dimensional accuracy, performing two-person simultaneous symmetric welding according to the welding sequence of 1.1; the method comprises the following steps that a bottoming layer is subjected to manual argon arc welding through a WS-400T manual argon arc welding machine by adopting ER50-6 welding wires, the end parts of box bodies on two sides are sealed during welding, the problem that poor argon protection is caused by cross-ventilation and internal and external welding defects are caused is solved, all-position welding is particularly focused on weld joint connection of a head and a tail, a magnifier 5-10 times is adopted to observe whether the internal and the external welding defects exist after the bottoming layer is completely welded, the levelness and the verticality of an integral beam are detected, if the levelness exceeds standard, the welding sequence is adjusted through an upper horizontal seam or a lower vertical seam, and if the verticality exceeds the standard, the welding sequence is adjusted through a left vertical seam and a right vertical seam, the detected data are ensured to be within a control range; after confirming that the bottoming layer has no defects, adopting an ER50-6 solid welding wire to perform filling and welding of the cover layer by an Nb-500P digital pulse gas shielded welding machine, paying attention to the change of the angle of a welding gun in the welding method of four welding positions in the welding process, preventing the phenomenon that the welding seam is not fused, preventing the cover layer from being too wide (generally less than 18mm), and enabling the joint to be in smooth transition to prevent undercut; after all welding is finished, the whole semi-portal beam assembly welding line is slowly cooled to room temperature by adopting a heat-preservation cotton bundle, the covering width is at least larger than 200mm of each of two sides of the welding line, the cooled welding line is polished on the surface of the welding line by adopting a manual angle grinder, the arc transition of the surface of the welding line is realized, then the welding quality is verified by flaw detection, the requirement of the semi-portal beam is completely met after the welding line is qualified at one time and is inspected and accepted through on-site actual assembly to a sample plate, and the semi-portal beam assembly is accurately assembled through a fixed-distance sliding rail which is matched up and down, and the.
In the embodiment, the method also comprises the step of controlling the shrinkage of the welding seam in the welding process, wherein when the shrinkage of the welding seam is found to be uneven in the welding process, the welding seam is welded by adopting small current, small gaps and narrow welding seams; during control, the manual argon arc welding current of the bottom layer is adjusted to be 60-90A, the carbon dioxide gas shielded welding current of the filling layer and the covering layer is adjusted to be 90-160A, the narrow channel is controlled to be 5-8 mm, the gap is generally set during assembly, and the gap is controlled to be 0.5-1.5 mm.
In the present embodiment, in the case of symmetrical welding, the upper horizontal seam welding is performed by the left-hand welding method, the lower horizontal seam welding is performed by the right-hand welding method, and the left vertical seam and the right vertical seam welding are performed simultaneously from bottom to top.
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 (10)
1. The utility model provides a fixed group of device of C type material canopy semi portal crossbeam butt joint which characterized in that: the device comprises a plurality of adjusting group assembling tools (3) which are arranged in sequence; each adjusting assembly tool (3) comprises an H-shaped beam placing support (31) formed by welding steel materials, and the middle part and two sides of the beam placing support (31) are respectively provided with an up-down verticality adjusting device and a left-right levelness adjusting device; a horizontal line support (34) is arranged at the top of one side of the cross beam placing support (31), and a plurality of adjusting groups which are arranged in sequence are arranged on the top of the horizontal line support (34) of the tool (3) to form a horizontal measuring line (2).
2. The C-shaped material shed semi-portal beam butt-joint fixing assembly device as claimed in claim 1, wherein: the vertical verticality adjusting device comprises threaded holes which are formed in the left and right sides of steel in the middle of an H-shaped beam placing support (31), and a vertical verticality adjusting screw rod (32) is vertically arranged in each threaded hole; the left and right levelness adjusting device comprises threaded holes correspondingly formed in the upper parts of steel on the left and right sides of an H-shaped beam placing support (31), and left and right levelness adjusting screws (33) are vertically arranged in each threaded hole.
3. The C-shaped material shed semi-portal beam butt-joint fixing assembly device as claimed in claim 1 or 2, wherein: the beam placing support (31) is made of H-shaped steel; the horizontal line support (34) is made of a steel pipe.
4. The utility model provides a fixed group of welding process of C type material canopy semi portal crossbeam butt joint, C type material canopy semi portal crossbeam is the box structure, prefabricates into a plurality of sections semi portal crossbeam units (1) in advance, its characterized in that, sets up groove (4) at the tip that each semi portal crossbeam unit (1) need dock to through any one claim 1-3 a C type material canopy semi portal crossbeam butt joint fixed group carry out the group to the welding to the device, the step as follows:
step one, preparation before welding:
1.1), the welding equipment is: the WS-400T manual argon arc welding machine has the gas purity of more than or equal to 99.99 percent and adopts carbon steel welding wire ER50-6 as a welding material; the Nb-500P digital pulse gas shielded welding machine is in direct current positive connection, the welding material is solid welding wire ER50-6, and the gas is argon and carbon dioxide;
1.2), welding position: symmetrically welding the all-position V-shaped grooves;
1.3), cleaning before welding: the welding position area and the welding wire do not have oil stain, an oxide layer, moisture and the like, the metal luster needs to be 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 technical requirements: one-side welding and two-side forming are carried out, a welding layer fuses base materials, and a welding seam cannot have any welding defects;
1.5), weldment material: Q355B;
1.6), groove size: a V-shaped groove;
1.7), auxiliary facilities: a level gauge, a sample plate, a magnifier, a face mask, gloves, a slag removal hammer, a chisel, a file, a wire brush, sand paper, a steel ruler, a level bar, a movable spanner, a straight grinder, an angle grinder, a wire pliers, a steel saw blade and labor protection articles;
8) and welding process parameters: determining welding parameters according to welding equipment, welding wire specifications and welding requirements;
step two, arranging a C-shaped material shed semi-portal beam butt joint fixing assembly device;
placing all adjusting group assembling tools (3) in sequence on a field site according to the specification of the C-shaped shed semi-portal beam, leveling all adjusting group assembling tools (3) through a level gauge, and then arranging horizontal measuring lines (2) on all horizontal line supports (34) to assemble the C-shaped shed semi-portal beam butt joint fixing group assembling device; horizontally placing each section of semi-portal beam unit (1) on the C-shaped shed semi-portal beam butt joint fixing assembly device in sequence, wherein grooves (4) formed in the end parts, needing butt joint, of each semi-portal beam unit (1) correspond to each other and are controlled within a specified gap range, then adjusting each semi-portal beam unit (1) through an upper and lower verticality adjusting device and a left and right levelness adjusting device according to the levelness and verticality of each semi-portal beam unit (1) and the thermal expansion and cold contraction process of a welding seam, measuring the integral levelness through a horizontal measuring line (2), and welding the butt joint grooves (4) after all technical specifications and welding process requirements are met;
thirdly, welding the semi-portal beam unit (1);
1.1), welding sequence: the fixed box butt weld joint is divided into a flat weld joint at the upper part, an overhead weld joint at the lower part, a vertical weld joint at the left part and a vertical weld joint at the right part; before welding, all welding seams are subjected to assembly fixed section welding according to technical requirements and specifications, then the welding is carried out in a symmetrical mode, simultaneous symmetrical welding of a flat welding seam at the upper part and an upward welding seam at the lower part is carried out firstly, then simultaneous symmetrical welding of a vertical welding seam at the left part and a vertical welding seam at the right part is carried out, or simultaneous symmetrical welding of a vertical welding seam at the left part and a vertical welding seam at the right part is carried out firstly, and then simultaneous symmetrical welding of a flat welding seam at the upper part and an upward welding seam at the lower part is carried out;
1.2), welding process: before welding, removing impurities such as paint, rust and burrs in the range of 35-45 mm on two sides of the groove, exposing the metallic luster of the base metal, then performing assembly and segmented welding, and after all meet the dimensional precision requirement, simultaneously and symmetrically welding according to the welding sequence of 1.1); the method comprises the following steps that a bottoming layer is subjected to manual argon arc welding through a WS-400T manual argon arc welding machine by adopting an ER50-6 welding wire, the end parts of box bodies on two sides are sealed during welding, the problem that poor argon protection is caused by cross-ventilation and welding defects of the inner part and the outer part are caused is solved, a magnifier of 5-10 times is adopted to see whether the welding defects of the inner part and the outer part exist after the bottoming layer is completely welded, the levelness and the verticality of an integral beam are detected, and if the welding sequence is adjusted in an overproof mode, the detected; after confirming that the bottoming layer has no defects, an ER50-6 solid welding wire is adopted by an Nb-500P digital pulse gas shielded welding machine for filling and welding the cover layer, the change of the angle of a welding gun is noticed in the welding process, the phenomenon that a welding seam is not fused is prevented, the cover layer is not too wide, the joint is in smooth transition, and undercut is prevented; after all welding is finished, the welding line is slowly cooled to room temperature by adopting a heat-preservation cotton bundle to the whole semi-portal beam assembly, the covering width is at least larger than 200mm of each of two sides of the welding line, the cooled welding line is polished on the surface of the welding line by adopting a manual angle grinder, the arc transition of the surface of the welding line is realized, then the welding quality is verified by flaw detection, and the field assembly verification is carried out after each lattice, so that all technical specifications are met, and the welding line is delivered for use.
5. The C-shaped material shed semi-portal beam butt-joint fixing assembly welding process as claimed in claim 6, wherein the parameters of manual argon arc welding of the bottoming layer are as follows: the welding wire is ER50-6 with the model of phi 2.5mm, the welding current is 120-160A, the arc voltage is 23 +/-1V, and the welding speed is 15 +/-1 cm/min; the parameters of the carbon dioxide arc welding of the filling layer are as follows: the solid welding wire is ER50-6 with the model of phi 1.2mm, the welding current is 260-280A, the arc voltage is 26-28V, and the welding speed is average 90 g/min; the parameters of the carbon dioxide arc welding of the cover layer are as follows: the solid welding wire is ER50-6 with the model of phi 1.2mm, the welding current is 280-320A, the arc voltage is 28-32V, and the welding speed is 90-140 g/min.
6. The butt-joint fixing group pairing welding process for the C-shaped shed semi-portal beam as claimed in claim 6, wherein the angle of the V-shaped groove is 30 ° ± 1.
7. The butt-joint fixing group pairing welding process for the C-shaped shed semi-portal beam as claimed in claim 6, further comprising the control of the shrinkage of the welding seam, wherein in the welding process, when the shrinkage of the welding seam is found to be uneven, the welding seam is welded by adopting small current, small gap and narrow welding seam; during control, the manual argon arc welding current of the bottom layer is adjusted to be 60-90A, the carbon dioxide gas shielded welding current of the filling layer and the covering layer is adjusted to be 90-160A, and the narrow channel is 5-8 mm.
8. The butt-joint fixing assembly welding process for the C-shaped material shed semi-portal beam according to claim 6, characterized in that a gap between grooves (4) formed in the end parts of the semi-portal beam units (1) needing butt joint is 0.5-1.5 mm.
9. The butt-joint fixing assembly welding process for the C-shaped shed semi-portal beam as claimed in claim 6, wherein the gases used by the Nb-500P digital pulse gas shielded welding machine are 80% argon and 20% carbon dioxide.
10. The butt-fixed pairing welding process for the C-shaped shed semi-portal beam as claimed in claim 6, wherein during symmetrical welding, a left-hand welding method is adopted for the flat seam welding of the upper part, a right-hand welding method is adopted for the overhead seam welding of the lower part, and a vertical seam welding of the left part and a vertical seam welding of the right part are simultaneously welded from bottom to top.
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Application publication date: 20210611 |