CN114633114A - Special-shaped reducing circular tube butt joint and machining and manufacturing method - Google Patents
Special-shaped reducing circular tube butt joint and machining and manufacturing method Download PDFInfo
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- CN114633114A CN114633114A CN202210203062.7A CN202210203062A CN114633114A CN 114633114 A CN114633114 A CN 114633114A CN 202210203062 A CN202210203062 A CN 202210203062A CN 114633114 A CN114633114 A CN 114633114A
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- 210000001503 joint Anatomy 0.000 title claims abstract description 32
- 238000003754 machining Methods 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000003466 welding Methods 0.000 claims abstract description 71
- 238000000034 method Methods 0.000 claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 238000007689 inspection Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000005452 bending Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000003908 quality control method Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 11
- 230000007547 defect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000009659 non-destructive testing Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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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
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/10—Aligning parts to be fitted together
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/2452—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring features or for detecting a condition of machine parts, tools or workpieces
- B23Q17/2471—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring features or for detecting a condition of machine parts, tools or workpieces of workpieces
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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
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
- B23Q17/2208—Detection or prevention of collisions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2716/00—Equipment for precise positioning of tool or work into particular locations
- B23Q2716/08—Holders for tools or work comprising a divider or positioning devices
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Abstract
The invention discloses a method for butting and processing a special-shaped variable-diameter circular tube, which comprises the steps of blanking a main body, then performing groove processing on the main body, pre-bending two ends of the main body through a blank holder, processing the main body into a plurality of tube barrels with two different diameters, placing the tube barrels on a welding table to weld a gap, and installing an inner partition plate in the tube barrels after welding is completed; a group of pipe barrels are butted together through the eccentric reducing special-shaped pipe to form a component, a steel lining plate is arranged in the butt joint position of the eccentric reducing special-shaped pipe and the pipe barrels, and the component meets the preset requirement; after the part is blanked, the part is subjected to groove making and drilling making, the part is assembled on the component, quality inspection is carried out after the assembly, and forming welding is carried out after the quality inspection is qualified. The precision of assembling each bracket on the pipe barrel in a multi-level, multi-direction and multi-angle manner is improved, the construction procedure is simplified, and the bracket assembling speed and the component assembling speed are improved.
Description
Technical Field
The invention relates to the technical field of steel structures, in particular to a method for butting special-shaped reducing circular tubes and processing and manufacturing the special-shaped reducing circular tubes.
Background
The bracket is the alias of the beam support, and is used for dispersing the force of the beam support to be transmitted to a load bearing object below the beam in a mixed structure, and because the concentrated force on one surface is too large, the wall body is easily crushed.
Along with the steel construction is in domestic extensive application, building modeling brings higher requirement to the manufacturing of steel construction, large-scale steel pipe batter post and square pipe annular beam space butt joint structural style are handsome in appearance, simple to operate, the time limit for a project is shorter, advantages such as environmental protection practicality, but because the structure is comparatively complicated, there is the error in preparation process straightness control, lead to upper and lower tubular column butt joint back, side bend and distortion appear easily, the bracket symmetrical assembly of equidirectional not has the particularity on the tubular column of different diameters, symmetry multi-angle multilayer annular structure has the particularity in the off centre, so the assembly setpoint is difficult for confirming, central line control is improper, lead to the bracket slope easily, can directly influence the quality of steel construction, cause certain degree of difficulty for production. Therefore, the steel structure construction industry is better improved on the existing steel structure construction process and the manufacturing method thereof.
Therefore, how to increase the accuracy of docking and accurate assembly is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a method for butting and processing special-shaped reducing circular tubes, which is used for solving the problems of inaccurate assembly positioning points, inaccurate multi-tube butting and unstable bracket installation in the prior art and comprises the following steps:
after the main body is blanked, making a groove on the main body, pre-bending two ends of the main body through a blank holder, processing the main body into a plurality of pipe barrels with two different diameters, placing the pipe barrels on a welding table to weld the gap, and installing an inner partition plate inside the pipe barrels after the welding is finished;
placing a group of pipe barrels on a tooling table, and correcting the tooling table, the pipe barrels and the eccentric reducing special-shaped pipes;
a group of pipe barrels are butted together through the eccentric reducing special-shaped pipe to form a component, a steel lining plate is arranged in the butt joint position of the eccentric reducing special-shaped pipe and the pipe barrels, and the component meets the preset requirement;
after blanking, groove making and drilling making are carried out on the part, the part is assembled on the component, quality inspection is carried out after the assembly, and forming welding is carried out after the quality inspection is qualified;
wherein the main body comprises a steel plate, the parts comprise an H-shaped bracket and a box-shaped bracket, and the group of pipe barrels at least comprises two pipe barrels with different diameters.
In some embodiments of the present application, the body is beveled, the longitudinal seam beveled according to an inner first angle, and the circumferential seam beveled according to an outer first angle.
In some embodiments of the present application, the tube is placed on a welding station to weld the gap, specifically:
firstly welding an inner longitudinal seam, carrying out back gouging on the outer welding seam before the outer welding seam through a carbon arc gouging, then carrying out the outer welding seam after the back gouging, carrying out carbon gouging until the metal of the front welding bead is exposed, cleaning slag, and polishing and correcting a groove through a grinding wheel.
In some embodiments of the application, it is right through the laser level appearance frock platform is rectified, fixes the eccentric reducing dysmorphism pipe that inside is equipped with the stiffening plate on the horizontal stand, confirms through the level bar the horizontal center point of bobbin, through the perpendicular central line that ruler and pendant were looked for, marks out the cross setpoint of bobbin, pop out through the chalk line the surperficial cross datum line of bobbin.
In some embodiments of the application, a group of the pipe barrel and the eccentric reducing special-shaped pipe are sequentially placed on the tool table, the position point of a cross reference line of the surface of the pipe barrel, which is 180 degrees, on the vertical plane coincides with the center line of the ground sample on the tool table, and the eccentric reducing special-shaped pipe and the pipe barrel are in butt joint.
In some embodiments of the present application, the preset requirements include:
the deviation opposite staggered edge is not more than a first preset interval;
a camber rise is no greater than a threshold ratio of the member length;
the length of the member does not exceed a second preset interval;
and the length of the butt joint seam is increased within the first preset interval during butt joint.
In some embodiments of the present application, the two flanges and the web groove of the H-shaped bracket are at a first angle, the box-shaped bracket outer web groove is at a second angle, the box-shaped bracket inner web and the tube vertical groove are at a first angle, the box-shaped bracket upper flange and the H-shaped bracket are jointed to have an oblique included angle groove at a third angle, and the box-shaped bracket lower flange reduction degree is within a third preset interval.
In some embodiments of the present application, after the parts are assembled, the method further comprises:
after all brackets spot welding, carry out the self-checking, with laser projector check all brackets on the plane all according to design dimension in same parallel plane, bracket plate face roughness deviation is in the fourth interval of predetermineeing, bracket installation accuracy deviation is in the fourth interval of predetermineeing, and the special personnel of examining carry out the quality control to each item equipment data behind the self-checking.
In some embodiments of the present application, during assembly, the distance between the tube center line and the square tube bracket center line is measured on the tube surface by scribing lines through a laser projector, and the positioning center line is drawn on the tube surface corresponding to each bracket center line according to the distance.
In some embodiments of the present application, the body and the part blanking manner are plasma typesetting blanking.
Therefore, compared with the prior art, the method adopted by the invention has the following beneficial effects:
1. the natural groove at the intersection of the pipe barrel, the H-shaped steel bracket and the box-type bracket part is correspondingly and accurately machined to a first-angle welding groove, so that the width of a welding bead is reasonable, the reasonable design of the welding seam is ensured, the welding defect is reduced, and the quality of the butt welding seam of the pipe barrel and the box-type bracket after welding can be improved.
2. By the aid of the round cross positioning method, a center line is marked on the surface of the pipe barrel, and according to the distance between the center line of the pipe barrel and the center line of each bracket, a bracket positioning center line is marked, so that the precision of multi-level, multi-direction and multi-angle assembly of each bracket on the pipe barrel is improved, the construction procedure is simplified, and the bracket assembly speed and the component assembly speed are improved.
3. The perpendicularity of the connected components is checked by adopting a laser projector, whether the upper planes of all the brackets are in the same parallel tangent plane is checked, the traditional method that the ground sample is placed firstly and then assembled by contrasting the ground sample is replaced, the method is more accurate and efficient, the welding seam defects are reduced according to the optimized assembly sequence and the welding process, the production progress of the components is improved, and the construction progress of the project is promoted.
Drawings
FIG. 1 is a schematic flow chart of a method for butt joint and machining and manufacturing a special-shaped reducing circular tube according to the invention;
FIG. 2 is a schematic structural diagram of the special-shaped reducing circular tube in the invention;
FIG. 3 is a left side view of the special-shaped reducing circular tube according to the present invention;
fig. 4 is a front view of the special-shaped reducing round pipe.
In FIGS. 2-4, 1, a small diameter tube; 2. parallel corbels; 3. a box-type bracket; 4. eccentric reducing special-shaped pipe; 5. a large diameter tube.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
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 invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The invention provides a method for butting and processing special-shaped reducing circular tubes, which comprises the following four steps as shown in figure 1:
step S101, after a main body is blanked, making a groove on the main body, pre-bending two ends of the main body through a blank holder, processing the main body into a plurality of pipe barrels with two different diameters, placing the pipe barrels on a welding table to weld gaps, and installing an inner partition plate in each pipe barrel after welding is completed;
step S102, a group of pipe barrels are placed on a tooling platform, and the tooling platform, the pipe barrels and the eccentric reducing special-shaped pipes are corrected;
step S103, a group of pipe barrels are butted together through the eccentric reducing special-shaped pipe to form a member, a steel lining plate is arranged in the butted position of the eccentric reducing special-shaped pipe and the pipe barrels, and the member meets the preset requirement;
and S104, after the part is blanked, groove making and drilling making are carried out on the part, the part is assembled on the component, quality inspection is carried out after the assembly, and forming welding is carried out after the quality inspection is qualified.
In some embodiments of the application, in step S101, after the main body is blanked, the main body is beveled, two ends of the main body are pre-bent by a blank holder, the main body is processed into a plurality of pipe barrels with two different diameters, the pipe barrels are placed on a welding table to weld a gap, and after the welding is completed, an inner partition plate is installed inside the pipe barrels.
In the step, after the main body is fed, a groove is manufactured on the main body, wherein the longitudinal seam is an inner 45-degree (first-angle) groove, and the circular seam is an outer 45-degree (first-angle) groove. Pre-bending two ends of a main steel plate through a blank pressing device, machining the steel plate into a pipe barrel through a rolling and rounding machine, and placing the pipe barrel on a welding table to weld the inner longitudinal seam. Before welding of an external weld joint, firstly, back chipping is carried out by using a carbon arc gouging machine, then welding is carried out, the depth of the carbon gouging machine is only required to be up to the point that weld bead metal is exposed, slag is cleared, and a groove is polished and corrected by using a grinding wheel. After the welding is finished, the partition plates are arranged in the pipe barrel and are sequentially arranged from inside to outside, and the welding operation is synchronously carried out.
It can be understood that the edge pressing device is a device or a mechanism capable of pre-bending two ends of the main steel plate, and the device capable of performing the function is within the protection scope of the present application.
Carbon arc gouging is a method of melting metal by using a graphite rod or an electric arc generated between a carbon rod and a workpiece, and blowing off the metal by using compressed air to realize the processing of a groove on the surface of the metal.
In some embodiments of the present application, step S102, a group of tubes is placed on a tooling table, and the tooling table, the tubes, and the eccentric reducing profile tube are calibrated.
In the step, the pipe barrels welded in the step S101 are placed on a steel platform tooling table in a group mode according to a construction scheme for butt joint, in order to guarantee the butt joint precision and straightness of two different pipe barrels and eccentric reducing special-shaped pipes, firstly, a laser level meter is used for conducting horizontal correction on a steel platform tooling tire, the eccentric reducing special-shaped pipes with stiffening plates inside are fixed on the level table and cannot shake, a horizontal ruler is used for determining the horizontal central point of the pipe barrels, a vertical central line is found out through a horizontal ruler and a pendant, then a pipe barrel cross positioning point is marked, the method for marking two end heads of the pipe barrels is the same, and then a cross reference line on the surface of the pipe barrels is popped up through a powder line. The two pipe barrels and the special pipe are placed in position on a steel platform tooling table according to the ground sample, and the 180-degree (vertical plane) position point of the cross center line of the pipe barrel is required to be superposed with the center line of the ground sample on the steel platform. And a steel lining plate is arranged in the butt-joint intersecting welding line. The perpendicularity of the connected components is checked by adopting a laser projector, whether the upper planes of all the brackets are in the same parallel tangent plane is checked, the traditional method that the ground sample is placed firstly and then assembled by contrasting the ground sample is replaced, the method is more accurate and efficient, the welding seam defects are reduced according to the optimized assembly sequence and the welding process, the production progress of the components is improved, and the construction progress of the project is promoted.
It will be appreciated that a set in this step comprises at least two tubes of different diameters. The number can be changed according to actual requirements.
In some embodiments of the present application, step S103, a group of pipes are butted together through the eccentric reducing special-shaped pipe to form a component, a steel lining plate is arranged in a joint of the eccentric reducing special-shaped pipe and the pipes, and the component meets a preset requirement.
According to the datum line in the step S102, a group of pipe barrels are connected together in a butt joint mode through the eccentric reducing special-shaped pipe to form a component, the deviation allowable alignment misalignment of the steel lining plates arranged in the butt joint intersecting welding lines is not larger than 2-3mm (a first preset interval), the bending rise is not larger than one thousandth of the length of the component (threshold value ratio), the length of the component after welding is plus or minus 3mm (a second preset interval), proper welding shrinkage is reserved during butt joint, and each butt joint is just 2-3mm (within the first preset interval).
It can be understood that the length of the member is plus or minus 3mm, namely the member can float up and down for 3mm on the basis of the normal length of the member, and each pair of seam is plus 2-3mm, namely the member can be adjusted up for 2-3mm on the basis of the normal pair of seam.
In some embodiments of the present application, in step S104, after the part is blanked, the part is subjected to groove making and drilling making, the part is assembled on the component, quality inspection is performed after the assembly, and forming welding is performed after the quality inspection is qualified.
In this step, the part is subjected to groove making and drilling making. The method comprises the steps of conducting groove making and drilling after blanking of all bracket parts is completed, enabling grooves of two flanges of an H-shaped bracket and a web plate to be 45 degrees (first angle), enabling an outer web of a box-shaped bracket to be basically in a plane with a pipe skin so that the grooves are not large enough and are about 25 degrees (second angle), enabling an inner web to be about 45 degrees (first angle) basically perpendicular to the pipe skin, enabling an upper flange of the box-shaped bracket to be connected with the H-shaped bracket to be provided with an inclined included angle groove which is properly enlarged and is about 60 degrees (third angle), enabling a lower flange of the box-shaped bracket to be connected with the pipe skin to be provided with an inner inclined included angle which is not large enough, enabling the lower flange to be minus 15mm-20mm (third preset interval), enabling the welding effect of the box-shaped bracket to be completely molten and enabling all strips to be attached to the inside.
In some embodiments of the present application, during assembly, the distance between the tube center line and the square tube bracket center line is measured on the tube surface by scribing lines through a laser projector, and a positioning center line is drawn on the tube surface corresponding to each bracket center line according to the distance.
When each corbel is assembled, the center line is drawn. And marking the positioning center line of each bracket on the surface of the pipe barrel corresponding to the center line of each bracket during assembly. And according to the size of the cross positioning CAD measuring tool of the pipe barrel, measuring the distance between the center line of the pipe barrel and the center line of the square pipe bracket on the surface of the pipe barrel by adopting a laser projector to mark, and marking out the positioning center line of each bracket. By the aid of the round cross positioning method, a center line is marked on the surface of the pipe barrel, and according to the distance between the center line of the pipe barrel and the center line of each bracket, a bracket positioning center line is marked, so that the precision of multi-level, multi-direction and multi-angle assembly of each bracket on the pipe barrel is improved, the construction procedure is simplified, and the bracket assembly speed and the component assembly speed are improved.
In some embodiments of this application, all brackets spot-weld afterwards, carry out the self-checking, check with the laser projector whether the plane all is according to the design size in same parallel plane on all brackets, bracket plate face roughness deviation is in the fourth interval that predetermines, bracket installation accuracy deviation is in the fourth interval that predetermines, and the special inspection personnel carry out quality control to each item equipment data after the self-checking.
Firstly, mounting brackets in the middle of a component, welding hidden welding seams, then mounting brackets on the left side and the right side of the component, after all the brackets are spot-welded, checking whether planes on all the brackets are on the same parallel plane according to the design size by using a laser projector (initial check), wherein the allowable deviation of the plane flatness of the bracket plate is plus or minus 1mm (a fourth preset interval), and the allowable deviation of the mounting precision of the brackets is plus or minus 1 mm. And after the self-inspection is qualified, the assembly data are rechecked (quality inspection) by special inspection personnel, and after the rechecking is qualified, the next procedure is carried out for forming and welding. The natural groove at the intersection of the pipe barrel, the H-shaped steel bracket and the box-type bracket part is correspondingly and accurately machined to a first-angle welding groove, so that the width of a welding bead is reasonable, the reasonable design of the welding seam is ensured, the welding defect is reduced, and the quality of the butt welding seam of the pipe barrel and the box-type bracket after welding can be improved.
And (3) forming welding, namely adding welding, positioning welding and controlling welding deformation by adopting multilayer multi-channel symmetrical welding. The forming welding is strictly forbidden to carry out wide-width swing welding, welding slag and splashing of the previous welding line are required to be removed during welding, next welding can be carried out only after sundries are removed, joints of each welding line are staggered by more than 50MM, a reflow soldering method is adopted during arc striking, an arc pit is filled after arc extinguishing, nondestructive testing personnel is informed to carry out detection after welding of a bracket web, and after the detection is qualified, the size is specially detected for rechecking.
It can be understood that the parameter values such as the distance and the angle related in the scheme can be changed correspondingly according to actual requirements, and all of the parameter values belong to the protection scope of the present application.
Correspondingly, the invention also provides the special-shaped reducing circular pipe manufactured by the butt joint and machining method of the special-shaped reducing circular pipe, as shown in fig. 2-4, the special-shaped reducing circular pipe comprises two pipe barrels with different diameters and an eccentric reducing special-shaped pipe 4, a large-diameter pipe barrel 2 and a small-diameter pipe barrel 1 are fixedly connected to two ends of the eccentric reducing special-shaped pipe 4, box-type brackets 3 are arranged in four directions perpendicular to the eccentricity of the large-diameter pipe barrel 2 and the small-diameter pipe barrel 1, the two brackets in opposite directions are parallel, the parallel brackets are respectively provided with an inclined box-type bracket 2 up and down according to the design size of a drawing, an inner baffle is reasonably arranged in the pipe barrels according to the positions of the brackets, and a stiffening plate is arranged in the eccentric reducing special-shaped pipe 4.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (10)
1. A method for butting and processing special-shaped variable-diameter round pipes is characterized by comprising the following steps of:
after the main body is blanked, making a groove on the main body, pre-bending two ends of the main body through a blank holder, processing the main body into a plurality of pipe barrels with two different diameters, placing the pipe barrels on a welding table to weld the gap, and installing an inner partition plate inside the pipe barrels after the welding is finished;
placing a group of pipe barrels on a tooling table, and correcting the tooling table, the pipe barrels and the eccentric reducing special-shaped pipes;
a group of pipe barrels are butted together through the eccentric reducing special-shaped pipe to form a component, a steel lining plate is arranged in the butt joint position of the eccentric reducing special-shaped pipe and the pipe barrels, and the component meets the preset requirement;
after blanking, groove making and drilling making are carried out on the part, the part is assembled on the component, quality inspection is carried out after the assembly, and forming welding is carried out after the quality inspection is qualified;
wherein the main body comprises a steel plate, the parts comprise an H-shaped bracket and a box-shaped bracket, and the group of pipe barrels at least comprises two pipe barrels with different diameters.
2. The butt joint and machining method for the special-shaped reducing circular pipe according to claim 1, wherein grooves are formed in the main body, the longitudinal joints are divided into inner first-angle grooves, and the circular joints are divided into outer first-angle grooves.
3. The butt joint and machining manufacturing method for the special-shaped reducing circular pipe as claimed in claim 1, wherein the pipe barrel is placed on a welding table to weld a gap, and specifically comprises the following steps:
firstly welding an inner longitudinal seam, carrying out back gouging on the outer welding seam before the outer welding seam through a carbon arc gouging, then carrying out the outer welding seam after the back gouging, carrying out carbon gouging until the metal of the front welding bead is exposed, cleaning slag, and polishing and correcting a groove through a grinding wheel.
4. The butt joint and machining manufacturing method for the special-shaped reducing circular tube as claimed in claim 1, wherein the tool table is corrected through a laser level meter, the eccentric reducing circular tube with the stiffening plate inside is fixed on the horizontal table, the horizontal center point of the tube barrel is determined through a horizontal ruler, the cross positioning point of the tube barrel is marked through the vertical center line found by the straight ruler and the pendant, and the surface cross reference line of the tube barrel is popped out through a powder line.
5. The butt joint and machining method for special-shaped reducing circular tubes according to claim 4, wherein a group of tube barrels and the eccentric reducing circular tubes are sequentially placed on the tool table, the 180-degree vertical plane position of the cross reference line on the surface of the tube barrel is overlapped with the center line of the ground sample on the tool table, and the butt joint of the eccentric reducing circular tubes and the tube barrels is started.
6. The butt joint and machining manufacturing method for the special-shaped reducing circular pipe according to claim 1, wherein the preset requirements comprise:
the deviation opposite staggered edge is not more than a first preset interval;
a camber rise is no greater than a threshold ratio of the member length;
the length of the member does not exceed a second preset interval;
and the length of the butt joint seam is increased within the first preset interval during butt joint.
7. The method for butt joint and machining of special-shaped variable-diameter circular pipes according to claim 1, wherein grooves of two flanges and a web of the H-shaped bracket are at a first angle, a groove of an outer web of the box-shaped bracket is at a second angle, a vertical groove of an inner web of the box-shaped bracket and the pipe barrel is at a first angle, a groove with an inclined included angle at which an upper flange of the box-shaped bracket and the H-shaped bracket are connected is at a third angle, and the reduction degree of a lower flange of the box-shaped bracket is within a third preset interval.
8. The method for butting, machining and manufacturing the special-shaped reducing circular pipe according to claim 1, wherein after the parts are assembled, the method further comprises the following steps:
after all brackets spot welding, carry out the self-checking, with laser projector check all brackets on the plane all according to design dimension in same parallel plane, bracket plate face roughness deviation is in the fourth interval of predetermineeing, bracket installation accuracy deviation is in the fourth interval of predetermineeing, and the special personnel of examining carry out the quality control to each item equipment data behind the self-checking.
9. The butt joint and machining method for the special-shaped reducing circular pipe as claimed in claim 8, wherein during assembly, the distance between the center line of the pipe and the center line of the square pipe bracket is measured on the surface of the pipe by scribing through a laser projector, and a positioning center line is scribed on the surface of the pipe corresponding to the center line of each bracket according to the distance.
10. The method for butt joint and processing of the special-shaped reducing circular tube as claimed in claim 1, wherein the blanking mode of the main body and the parts is plasma typesetting and blanking.
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