CN113857731A - Positioning welding method and positioning welding fixture for precise multi-node four-way pipe - Google Patents
Positioning welding method and positioning welding fixture for precise multi-node four-way pipe Download PDFInfo
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- CN113857731A CN113857731A CN202111249102.3A CN202111249102A CN113857731A CN 113857731 A CN113857731 A CN 113857731A CN 202111249102 A CN202111249102 A CN 202111249102A CN 113857731 A CN113857731 A CN 113857731A
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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 for a procedure covered by only one of the other main groups of this subclass
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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 for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass 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
- 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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Abstract
The invention discloses a positioning welding method and a positioning welding fixture for a precise multi-node four-way pipe. Install the fixed block on the bottom plate through second screw and locating pin, the long pipe fitting horizontal installation that will process is in the internal diameter that third semicircle recess and first semicircle recess are constituteed is phi D's round hole, install the one end of short pipe fitting perpendicularly on the long pipe fitting in the through-hole that the internal diameter is phi D1, the short pipe fitting external diameter is phi D2 position and arranges the internal diameter that fourth semicircle recess and second semicircle recess are constituteed in the round hole that is phi D2, align locating surface F on fixed block and the short pipe fitting and can weld. The invention has the advantages of simple structure, reliable clamping, accurate positioning, convenient disassembly and easy manufacture, and can manufacture high-precision multi-node four-way pipes.
Description
Technical Field
The invention relates to a method for manufacturing a precise multi-node four-way pipe part, in particular to a method for manufacturing a precise multi-node four-way pipe by adopting a welding method and a special positioning and welding clamp.
Background
The processing of the multi-node four-way pipe (namely, a plurality of same four-way pipes are sequentially connected together, and the connection point of every two four-way pipes is a node) is commonly used by two processing methods of casting and welding.
Disclosure of Invention
In order to solve the technical problems, the invention aims to design a positioning welding method and a positioning welding fixture of a precise multi-node four-way pipe aiming at the structural characteristics of precise multi-node four-way pipe parts.
In order to realize the purpose, the invention adopts the following technical scheme:
a positioning welding fixture for a precise multi-node four-way pipe comprises a long pipe and short pipes, wherein the outer diameter of the long pipe is phi D, the short pipes are vertically and symmetrically connected to the surface of the long pipe by taking the axis of the long pipe as a symmetry axis, the axes of the short pipes are in the same plane, the short pipes are provided with a positioning surface F perpendicular to the axis of the short pipes, the outer diameter of the short pipes at the positioning surface F is phi D2, the distance from the positioning surface F to the axis of the long pipe is equal to H, the interval between the adjacent short pipes is equal to L, the positioning welding fixture comprises,
the bottom plate is provided with a plurality of through grooves which penetrate through the upper end surface and the lower end surface of the bottom plate, and the bottom plate is also provided with a plurality of first positioning pin holes and first threaded holes;
the fixing blocks are provided with windows penetrating through the upper end face and the lower end face of the fixing blocks, the fixing blocks are positioned on the upper end face of the bottom plate, the fixing blocks are provided with second threaded holes, first guiding positioning pin holes and second positioning pin holes, the second threaded holes are coaxial with the first threaded holes, the second positioning pin holes are coaxial with the first positioning pin holes, the fixing blocks are also provided with first semicircular grooves with half phi D inner diameters and second semicircular grooves with half phi D2 inner diameters, and the second positioning pin holes are intersected with the second semicircular grooves;
the pressing blocks are provided with windows penetrating through the upper end face and the lower end face of each pressing block, the pressing blocks are positioned above the fixed blocks, the pressing blocks are provided with third threaded holes, fourth threaded holes and second guiding and positioning pin holes, the third threaded holes are coaxial with the second threaded holes, the second guiding and positioning pin holes are coaxial with the first guiding and positioning pin holes, the pressing blocks are further provided with third semicircular grooves with half phi D inner diameters and fourth semicircular grooves with half phi D2 inner diameters, the fourth semicircular grooves and the second semicircular grooves form circular holes with phi D2 inner diameters, the third semicircular grooves and the first semicircular grooves form circular holes with phi D inner diameters, and the fourth threaded holes and the fourth semicircular grooves are intersected;
the guide positioning pin is inserted in the first guide positioning pin hole and the second guide positioning pin hole and is coaxial with the first guide positioning pin hole and the second guide positioning pin hole;
the compression screw is in threaded connection with the fourth threaded hole;
the first screw is in threaded connection with the third threaded hole and the second threaded hole, and the first screw thread is coaxial with the third threaded hole and the second threaded hole;
the positioning pin is inserted in the first positioning pin hole and the second positioning pin hole;
a second screw threadedly connected in the first and second threaded holes. And the second screw is coaxial with the first threaded hole and the second threaded hole.
Alternatively, the length of the base plate is greater than the maximum spacing between any two short tubes, the spacing being parallel to the axis of the long tube.
Alternatively, the width of the bottom plate is equal to 2 times the distance H from the positioning surface F of the short pipe fitting to the axis of the long pipe fitting;
the width of the fixing block is equal to 2 times of the distance H from the positioning surface F of the short pipe fitting to the axis of the long pipe fitting;
the width of the pressing block is equal to 2 times of the distance H from the positioning surface F of the short pipe fitting to the axis of the long pipe fitting.
Alternatively, the distance between two adjacent first positioning pin holes on the bottom plate is equal to the interval L between the adjacent short pipe fittings, and the axes of the first positioning pin holes are vertically intersected with the axes of the second semicircular groove and the fourth semicircular groove.
Alternatively, the first positioning pin holes and the first threaded holes are distributed along two parallel straight lines on the bottom plate, and are arranged on each straight line according to the first threaded holes, the first positioning pin holes, the first threaded holes …, the first positioning pin holes, and the first threaded holes.
Alternatively, the first screws are uniformly distributed at four vertexes of a rectangle centering on the intersection point of the axes of the long pipe and the short pipe.
Alternatively, two guide positioning pins are inserted into each pressing block, and the guide positioning pins are respectively arranged on two sides of the axis of the third semicircular groove.
A positioning welding method for a precise multi-node four-way pipe comprises a long pipe fitting and a short pipe fitting, wherein the outer diameter of the long pipe fitting is phi D, the short pipe fittings are vertically and symmetrically connected to the surface of the long pipe fitting by taking the axis of the long pipe fitting as a symmetry axis, the outer diameter of one end, connected with the long pipe fitting, of each short pipe fitting is phi D1, the axes of the short pipe fittings are in the same plane, the short pipe fitting is provided with a positioning surface F perpendicular to the axis of the short pipe fitting, the outer diameter of the short pipe fitting at the positioning surface F is phi D2, the distance from the positioning surface F to the axis of the long pipe fitting is H, the interval between the adjacent short pipe fittings is L, and the positioning welding fixture is adopted and comprises the following steps,
step one, processing a long pipe fitting, wherein the outer diameter of the long pipe fitting is finely processed to phi D, the full-length straightness of the long pipe fitting is ensured to meet the design requirement, and processing a short pipe fitting is carried out, so that the appearance of the short pipe fitting is ensured to be qualified;
step two, processing through holes with the inner diameter of phi D1 connected with the short pipe fittings on the long pipe fittings, and ensuring the pitch of the through holes to be L;
step three, a fixed block is arranged on the bottom plate through a second screw and a positioning pin, the long pipe fitting processed in the step one and the step two is horizontally arranged in a round hole with the inner diameter phi D formed by a third semicircular groove and a first semicircular groove, one end of a short pipe fitting is vertically arranged in a through hole with the inner diameter phi D1 on the long pipe fitting, the position with the outer diameter phi D2 of the short pipe fitting is ensured to be arranged in a round hole with the inner diameter phi D2 formed by a fourth semicircular groove and a second semicircular groove, a compression block and the fixed block are combined through the guide positioning pin, the first screw is slightly screwed, and the pre-assembly of the precise multi-node four-way pipe is completed;
step four, adjusting the short pipe fittings to enable the positioning surfaces F on the short pipe fittings to be respectively level with the two end surfaces in the width direction of the fixing block, tightening the compression screws to fixedly compress the short pipe fittings, and then tightening the first screws to complete the assembling and positioning of the precise multi-node four-way pipe;
and fifthly, welding and processing the welding seam at the joint of the long pipe fitting and the short pipe fitting.
And after the welding processing of the step five is finished, after the precise multi-node four-way pipe is cooled and is shaped in the clamp, loosening the first screw, disassembling the pressing block and taking down the welded precise multi-node four-way pipe.
Alternatively, in the second step, a through hole with the inner diameter of Φ D1 is machined by adopting a fine boring method.
Compared with the prior art, the welding fixture and the positioning welding method have the following characteristics:
(1) the positioning welding fixture is simple in structure and low in manufacturing difficulty, the width size (equal to 2 times H) of the positioning block facilitates positioning of the positioning surface of the short pipe fitting, the first positioning hole in the bottom plate facilitates positioning of the distance between the adjacent short pipe fittings, and the positioning pin and the guide positioning pin can ensure the position size relation between the long pipe fitting and the short pipe fitting.
(2) The positioning welding fixture has the advantages of simple structure, reliable clamping, accurate positioning, convenient disassembly, convenient operation and easy manufacture, and solves the processing problem of precise multi-node four-way pipe parts by matching with the welding method of the invention. (3) The positioning welding fixture has good universality, the number of positioning blocks and pressing blocks can be reduced and increased according to the requirement of the number of short pipe fittings of the precise multi-node four-way pipe, and the positioning welding and processing of parts of the multi-node four-way pipe are realized. (4) According to the invention, after the long pipe and the short pipe which form the multi-node four-way pipe are accurately positioned and assembled by using the positioning blocks, parts are welded, and the welding precision is high.
Drawings
FIG. 1 is a schematic view of a precision multi-node four-way pipe component of the present invention;
FIG. 2 is a schematic view of a welding fixture according to the present invention;
FIG. 3 is a schematic view of a fixing block and a pressing block according to the present invention;
FIG. 4 is a schematic view of a base plate of the present invention;
FIG. 5 is a schematic view of a partial structure of the tack welding fixture of the present invention;
in the figure, 1, a bottom plate, 2, a fixed block, 3, a compression block, 4, a guide positioning pin, 5, a compression screw, 6, a first screw, 7, a positioning pin, 8, a second screw, 9, a long pipe fitting and 10, a short pipe fitting.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made based on the common technical knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.
As shown in fig. 1, the precise multi-node four-way pipe part includes a long pipe 9 and a short pipe 10, the outer diameter of the long pipe 9 is Φ D, the short pipes 10 are perpendicular to each other with the axis of the long pipe 9 as the symmetry axis and are symmetrically connected to the surface of the long pipe 9, the outer diameter of one end of the short pipe 10 connected to the long pipe 9 is Φ D1, the axes of the short pipes 10 are in the same plane, the short pipe 10 is provided with a positioning surface F perpendicular to the axis of the short pipe 10, the outer diameter of the short pipe 10 at the positioning surface F is Φ D2, the distance from the positioning surface F to the axis of the long pipe 9 is equal to H, and the distance between the adjacent short pipes 10 is equal to L.
As shown in fig. 2, the positioning welding fixture is assembled by a bottom plate 1, 3 fixing blocks 2, 3 pressing blocks 3, 6 guide positioning pins 4, 6 pressing screws 5, 12 first screws 6, 12 positioning pins 7, 12 second screws 8 and the like. The bottom plate 1 is provided with 3 through grooves which penetrate through the upper end surface and the lower end surface of the bottom plate 1, and the bottom plate 1 is also provided with 6 first positioning pin holes and 12 first threaded holes; the fixed block 2 is provided with a window penetrating through the upper end face and the lower end face of the fixed block 2, the fixed block 2 is positioned on the upper end face of the bottom plate 1, the fixed block 2 is provided with a second threaded hole, a first guiding positioning pin hole and a second positioning pin hole, the second threaded hole is coaxial with the first threaded hole, the second positioning pin hole is coaxial with the first positioning pin hole, the fixed block 2 is also provided with a first semicircular groove with half phi D in inner diameter and a second semicircular groove with half phi D2 in inner diameter, and the second positioning pin hole is intersected with the second semicircular groove; a window penetrating through the upper end face and the lower end face of the pressing block 3 is formed in the pressing block 3, the pressing block 3 is located above the fixed block 2, a third threaded hole, a fourth threaded hole and a second guiding and positioning pin hole are formed in the pressing block 3, the third threaded hole is coaxial with the second threaded hole, the second guiding and positioning pin hole is coaxial with the first guiding and positioning pin hole, a third semicircular groove with half phi D in inner diameter and a fourth semicircular groove with half phi D2 in inner diameter are further formed in the pressing block 3, the fourth semicircular groove and the second semicircular groove form a circular hole with phi D2 in inner diameter, the third semicircular groove and the first semicircular groove form a circular hole with phi D in inner diameter, and the fourth threaded hole is intersected with the fourth semicircular groove; the guide positioning pin 4 is inserted in the first guide positioning pin hole and the second guide positioning pin hole, and the guide positioning pin 4 is coaxial with the first guide positioning pin hole and the second guide positioning pin hole; the compression screw 5 is in threaded connection with the fourth threaded hole; the first screw 6 is in threaded connection with the third threaded hole and the second threaded hole, and the first screw 6 is coaxial with the third threaded hole and the second threaded hole; the positioning pin 7 is inserted in the first positioning pin hole and the second positioning pin hole; the second screw 8 is screwed in the first and second threaded holes. And the second screw 8 is coaxial with the first threaded hole and the second threaded hole.
The components are characterized as follows:
three lightening grooves (the lightening grooves penetrate through the upper end face and the lower end face of the bottom plate 1) are correspondingly processed at the position where the fixing block 2 is installed on the bottom plate 1, enough welding operation space is ensured at the lightening grooves of the bottom plate 1 while the weight of the bottom plate 1 is reduced, the welding operation can be conveniently carried out on the connecting welding seam of the long pipe fitting 9 and the short pipe fitting 10 on the front side and the back side during welding processing, and the penetrating windows on the fixing block 2 and the pressing block 3 are matched at the same time;
the widths of the bottom plate 1, the fixing block 2 and the pressing block 3 are consistent and equal to 2 times of the distance H between two positioning surfaces F on two short pipe fittings 10 symmetrically connected to two sides of the axis of the long pipe fitting 9 of the precise multi-node four-way pipe to be welded, namely 2H, which corresponds to 2(H +/-0.01) in the figure 2, so that the dimension H can be conveniently determined during subsequent assembly of the short pipe fittings 10;
the center line of a round hole with the inner diameter phi D formed by a third semicircular groove and a first semicircular groove in the fixed block 2 and the pressing block 3 is a symmetrical center line of the positioning welding fixture, and the distance between round holes with the inner diameter phi D2 formed by a fourth semicircular groove and a second semicircular groove in the three groups of fixed blocks 2 and the pressing block 3 is equal to the horizontal distance L between two adjacent short pipe fittings 10 in the welded precise multi-node four-way pipe part, which corresponds to L +/-0.02 in the figure 2;
the outer diameter of the guide positioning pin 4 is matched with the first guide positioning pin hole and the second guide positioning pin hole, so that the relative position of the pressing block 3 and the fixing block 2 is limited and fixed, and the outer diameter of the positioning pin 7 is matched with the first positioning pin hole and the second positioning pin hole, so that the relative position of the fixing block 2 and the bottom plate 1 is limited and fixed.
When the precise multi-node four-way pipe part is manufactured, the method is implemented according to the following steps:
the first step is as follows: the outer diameter of the long pipe fitting 9 is finely processed to a size phi D as shown in figure 1, the full-length straightness of the long pipe fitting 9 is not inferior to 0.02, and the short pipe fitting 10 is processed to be qualified according to the appearance required by the design;
the second step is that: according to the figure 1, finely boring a 3-phi D1 through hole on a long pipe fitting 9 according to the size of the large end of a short pipe fitting 10 (namely, the end welded with the long pipe fitting 9) to ensure that the hole spacing size of the phi D1 hole is L +/-0.02;
the third step: installing a fixed block 2 on a bottom plate 1 through a second screw 8 and a positioning pin 7 as shown in FIG. 2, horizontally installing a long pipe fitting 9 processed in the first step and the second step in a round hole with the inner diameter phi D formed by a third semicircular groove and a first semicircular groove on the fixed block 2 and a pressing block 3, vertically installing one end of a short pipe fitting 10 in a through hole with the inner diameter phi D1 on the long pipe fitting 9, ensuring that the position with the outer diameter phi D2 of the short pipe fitting 10 is placed in a round hole with the inner diameter phi D2 formed by a fourth semicircular groove and a second semicircular groove on the fixed block 2 and the pressing block 3, combining the pressing block 3 and the fixed block 2 by using a guide positioning pin 4, slightly screwing the first screw 6, and completing the pre-assembly of the precise multi-node four-way pipe;
the fourth step: according to the figure 2, adjusting the axial positions of 6 short pipe fittings 10 to enable the positioning surfaces F (figure 1) to be respectively flush with two end surfaces with the distance of 2H in the width direction of a fixing block 2, fixing and pressing the short pipe fittings 10 by using compression screws 5, then screwing down first screws 6, and assembling and positioning the precise multi-node four-way pipe parts to be welded;
the fifth step: welding and processing a welding seam at the joint of the long pipe fitting 9 and the short pipe fitting 10 at the position 6 according to the welding seam position shown in the figure 1;
and a sixth step: after the welding process is finished, the part is cooled, the precision multi-node four-way pipe part is shaped in the clamp, the first screw 6 is loosened, the pressing block 3 is disassembled, and the welded part can be easily taken down from the positioning welding clamp.
Claims (10)
1. The utility model provides a positioning welding anchor clamps of accurate multinode four-way pipe, accurate multinode four-way pipe includes long pipe fitting (9) and short pipe fitting (10), long pipe fitting (9) external diameter is PhiD, many short pipe fittings (10) use long pipe fitting (9) axis perpendicular, the surface of symmetric connection in long pipe fitting (9), the axis of many short pipe fittings (10) is in same plane, there is the locating surface F of a perpendicular to short pipe fitting (10) axis on short pipe fitting (10), short pipe fitting (10) are PhiD 2 at the external diameter of locating surface F department, locating surface F equals H to the axis distance of long pipe fitting (9), the interval between the adjacent short pipe fitting (10) equals L, its characterized in that: the positioning welding fixture comprises a positioning welding fixture and a positioning welding fixture,
the bottom plate (1) is provided with a plurality of through grooves, the through grooves penetrate through the upper end face and the lower end face of the bottom plate (1), and the bottom plate (1) is also provided with a plurality of first positioning pin holes and first threaded holes;
the fixing blocks (2) are provided with windows penetrating through the upper end face and the lower end face of the fixing blocks (2), the fixing blocks (2) are positioned on the upper end face of the bottom plate (1), the fixing blocks (2) are provided with second threaded holes, first guiding positioning pin holes and second positioning pin holes, the second threaded holes are coaxial with the first threaded holes, the second positioning pin holes are coaxial with the first positioning pin holes, the fixing blocks (2) are further provided with first semicircular grooves with half phi D inner diameter and second semicircular grooves with half phi D2 inner diameter, and the second positioning pin holes are intersected with the second semicircular grooves;
the pressing blocks (3) are provided with windows penetrating through the upper end face and the lower end face of each pressing block (3), each pressing block (3) is located above the corresponding fixing block (2), each pressing block (3) is provided with a third threaded hole, a fourth threaded hole and a second guiding and positioning pin hole, the third threaded holes are coaxial with the second threaded holes, the second guiding and positioning pin holes are coaxial with the first guiding and positioning pin holes, each pressing block (3) is further provided with a third semicircular groove with half phi D in inner diameter and a fourth semicircular groove with half phi D2 in inner diameter, each fourth semicircular groove and each second semicircular groove form a circular hole with phi D2 in inner diameter, each third semicircular groove and each first semicircular groove form a circular hole with phi D in inner diameter, and each fourth threaded hole is intersected with each fourth semicircular groove;
the guide positioning pin (4) is inserted into the first guide positioning pin hole and the second guide positioning pin hole, and the guide positioning pin (4) is coaxial with the first guide positioning pin hole and the second guide positioning pin hole;
the compression screw (5) is in threaded connection with the fourth threaded hole;
the first screw (6) is in threaded connection with the third threaded hole and the second threaded hole, and the threads of the first screw (6) are coaxial with the third threaded hole and the second threaded hole;
the positioning pin (7) is inserted into the first positioning pin hole and the second positioning pin hole;
a second screw (8), the second screw (8) being threaded in the first and second threaded holes. And the second screw (8) is coaxial with the first threaded hole and the second threaded hole.
2. The positioning welding fixture for the precise multi-node four-way pipe according to claim 1, characterized in that: the length of the bottom plate (1) is larger than the maximum distance between any two short pipe fittings (1), and the distance is parallel to the axis of the long pipe fitting (9).
3. The positioning welding fixture for the precise multi-node four-way pipe according to claim 1, characterized in that:
the width of the bottom plate (1) is equal to 2 times of the distance H from the positioning surface F of the short pipe fitting (10) to the axis of the long pipe fitting (9);
the width of the fixing block (2) is equal to 2 times of the distance H from the positioning surface F of the short pipe fitting (10) to the axis of the long pipe fitting (9);
the width of the pressing block (3) is equal to 2 times of the distance H from the positioning surface F of the short pipe fitting (10) to the axis of the long pipe fitting (9).
4. The positioning welding fixture for the precise multi-node four-way pipe according to claim 1, characterized in that: the distance between two adjacent first positioning pin holes on the bottom plate (1) is equal to the interval L between the adjacent short pipe fittings (10), and the axes of the first positioning pin holes are vertically intersected with the axes of the second semicircular groove and the fourth semicircular groove.
5. The positioning welding fixture for the precise multi-node four-way pipe according to claim 1, characterized in that: the first positioning pin holes and the first threaded holes are distributed on the bottom plate (1) along two parallel straight lines and are arranged on each straight line according to the mode of the first threaded holes, the first positioning pin holes, the first threaded holes … and the first threaded holes.
6. The positioning welding fixture for the precise multi-node four-way pipe according to claim 1, characterized in that: the first screws (6) are uniformly distributed at four top points of a rectangle taking the intersection point of the axes of the long pipe fitting (9) and the short pipe fitting (10) as the center.
7. The positioning welding fixture for the precise multi-node four-way pipe according to claim 1, characterized in that: each pressing block (3) is inserted with two guide positioning pins (4), and the guide positioning pins (4) are respectively arranged on two sides of the axis of the third semicircular groove.
8. The utility model provides a positioning welding method of accurate multinode four-way pipe, accurate multinode four-way pipe includes long pipe fitting (9) and short pipe fitting (10), long pipe fitting (9) external diameter is Φ D, many short pipe fitting (10) use long pipe fitting (9) axis as the symmetry axis perpendicular, symmetrical connection in the surface of long pipe fitting (9), the one end external diameter that short pipe fitting (10) and long pipe fitting (9) are connected is Φ D1, the axis of many short pipe fitting (10) is in the same plane, short pipe fitting (10) are gone up and have a locating surface F that is perpendicular to short pipe fitting (10) axis, short pipe fitting (10) external diameter in locating surface F department is Φ D2, the axis distance of locating surface F to long pipe fitting (9) equals H, the interval between the adjacent short pipe fitting (10) equals L, its characterized in that: the positioning welding fixture of claim 3 is adopted, comprising the following steps,
step one, processing a long pipe fitting (9), wherein the outer diameter of the long pipe fitting (9) is finely processed to phi D, the full-length straightness of the long pipe fitting (9) is ensured to meet the design requirement, and processing a short pipe fitting (10) is ensured to be qualified in appearance;
step two, machining a through hole with the inner diameter of phi D1 connected with the short pipe fitting (10) on the long pipe fitting (9) to ensure that the pitch of the through hole is L;
step three, installing a fixed block (2) on a bottom plate (1) through a second screw (8) and a positioning pin (7), horizontally installing the long pipe fitting (9) processed in the step one and the step two in a round hole with the inner diameter phi D formed by a third semicircular groove and a first semicircular groove, vertically installing one end of a short pipe fitting (10) in a through hole with the inner diameter phi D1 on the long pipe fitting (9), ensuring that the position with the outer diameter phi D2 of the short pipe fitting (10) is placed in a round hole with the inner diameter phi D2 formed by a fourth semicircular groove and a second semicircular groove, combining a pressing block (3) and the fixed block (2) through a guide positioning pin (4), and slightly screwing the first screw (6) to complete the pre-assembly of the precise multi-node four-way pipe;
step four, adjusting a plurality of short pipe fittings (10) to enable positioning surfaces F on the short pipe fittings (10) to be flush with two end surfaces in the width direction of the fixing block (2) respectively, screwing down the compression screws (5) to fixedly compress the short pipe fittings (10), and then screwing down the first screws (6) to complete assembling and positioning of the precise multi-node four-way pipe;
and fifthly, welding a welding seam at the joint of the long pipe fitting (9) and the short pipe fitting (10).
9. The method for the positioned welding of the precise multi-node four-way pipe according to claim 9, wherein: and step six, after the welding processing of step five is finished, after the precise multi-node four-way pipe is cooled, the precise multi-node four-way pipe is shaped in the clamp, the first screw (6) is loosened, the pressing block (3) is disassembled, and the welded precise multi-node four-way pipe is taken down.
10. The method for the positioned welding of the precise multi-node four-way pipe according to claim 8, wherein: in the second step, a fine boring method is adopted to machine the through hole with the inner diameter of phi D1.
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| CN202111249102.3A CN113857731B (en) | 2021-10-26 | 2021-10-26 | Positioning welding method and positioning welding fixture for precise multi-node four-way pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119175537A (en) * | 2024-11-25 | 2024-12-24 | 成都航天万欣科技有限公司 | Integral machining method for cage-shaped structural member |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119175537A (en) * | 2024-11-25 | 2024-12-24 | 成都航天万欣科技有限公司 | Integral machining method for cage-shaped structural member |
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