CN111843085A - Method and tool for improving welding rate of pipe nozzle and rib plate flanging hole - Google Patents
Method and tool for improving welding rate of pipe nozzle and rib plate flanging hole Download PDFInfo
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- CN111843085A CN111843085A CN202010929886.3A CN202010929886A CN111843085A CN 111843085 A CN111843085 A CN 111843085A CN 202010929886 A CN202010929886 A CN 202010929886A CN 111843085 A CN111843085 A CN 111843085A
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- 238000003466 welding Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 238000005219 brazing Methods 0.000 claims description 17
- 239000000945 filler Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000003754 machining Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000011111 cardboard Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a method and a tool for improving the welding rate of a pipe nozzle and a rib plate flanging hole, which improve the existing welding method of the pipe nozzle and the rib plate flanging hole of a radiator and combine with the corresponding tool to ensure that the pipe nozzle and the flanging hole are assembled in a press-fitting mode without flaring riveting; make the mouthpiece down during welding, not only welding quality is better, and combines the supporting mechanism who increases on the frock to hold the mouthpiece terminal surface, prevents that the mouthpiece from falling under the action of gravity during the welding, and the operation is very convenient high-efficient. The invention has simple structure, low cost and high operation convenience, can efficiently finish the assembly of each part of the radiator by combining the corresponding tool, saves time and labor in assembly, ensures high assembly precision of each part, meets the welding positioning requirement of a product, obviously improves the welding strength, has good welding quality, long service life and high qualification rate of a finished product.
Description
Technical Field
The invention relates to a method and a tool for improving the welding rate of a pipe nozzle and a rib plate flanging hole, and belongs to the technical field of radiator manufacturing.
Background
Aluminum oil coolers and radiators are increasingly manufactured by using a vacuum brazing technology, and a large number of matching welding structures of nozzles and rib plate flanging holes appear on the products. At present, a method for brazing a pipe nozzle and a rib plate flanging hole after riveting and positioning is generally adopted, and the method comprises the following specific steps: firstly, inserting a pipe nozzle into a flanging hole of a rib plate, and fixing the pipe nozzle on the rib plate in a flaring riveting mode; the welding of the splicing parts of the two is realized by adopting a vacuum brazing technology. The method has the problems that the gap between the welding surface of the flanging hole and the outer wall of the nozzle becomes uneven, the gap is larger closer to the opening part of the flanging hole, the maximum gap reaches more than 0.1 and exceeds the maximum gap allowed by vacuum brazing, and the false welding is caused at the position close to the opening part of the flanging hole; and after the pipe mouth is flared, the height of the welding surface area is only about 1mm, the welding strength is low, and the use requirement of the product cannot be met.
Disclosure of Invention
In view of the above, the invention aims to provide a method and a tool for improving the welding rate of a nozzle and a rib plate flanging hole, which can overcome the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
a method for improving the welding rate of a pipe nozzle and a rib plate flanging hole comprises the following steps:
s1, machining the flanging hole on the rib plate to ensure that the aperture d of the flanging hole is = phi A +0.02 +0.01,
wherein phi A is the outer diameter of the nozzle of the radiator;
s2, assembling and combining the nozzle and the flanging hole in a press-fitting mode;
and s3, arranging the nozzle downwards relative to the rib plate, and welding the splicing part of the nozzle and the rib plate by adopting a vacuum brazing technology.
Wherein, the pipe nozzle is welded downwards, and the brazing filler metal on the rib plate flows downwards during welding, so that sufficient brazing filler metal is obtained on the welding surface of the pipe nozzle and the flanging hole; the height of the welding area reaches 2.5mm, and the welding rate reaches more than 90%.
The tool based on the method comprises a press-mounting machine, wherein a welding clamp is arranged on a working table top of the press-mounting machine, a press-mounting mechanism opposite to the welding clamp is arranged right above the welding clamp, and the press-mounting mechanism is connected with a press-mounting driving mechanism of the press-mounting machine.
The press-fitting mechanism comprises a press-fitting head, and a guide part matched with the inner hole of the nozzle is arranged at the center of the bottom surface of the press-fitting head.
The press-fitting head is a rubber sleeve, the guide part is nested in the rubber sleeve, and a conical guide head is arranged at the top end of the guide part.
The welding fixture comprises a lower die, an upper die, a lower clamping plate and an upper clamping plate which are oppositely arranged, wherein the lower clamping plate and the upper clamping plate are matched with the IGBT radiator and are fixedly connected between the lower die and the upper die through a plurality of groups of elastic clamping mechanisms; and a supporting mechanism for supporting the nozzle is arranged on the bottom surface of the lower clamping plate.
A sinking groove matched with the shape of the rib plate of the IGBT radiator is arranged in the middle of the lower clamping plate, first slot holes matched with the pipe nozzles are arranged on two sides of the sinking groove, and the supporting mechanism is fixedly connected to the bottom surface of the lower clamping plate and is positioned on the same axis with the first slot holes; and second slotted holes corresponding to the first slotted holes are arranged on the two sides of the upper clamping plate.
The supporting mechanism is of a U-shaped frame structure and is fixedly connected to the bottom surface of the lower clamping plate through bolts or fixedly connected to the bottom surface of the lower clamping plate through welding.
Third slotted holes for preventing the interference of the supporting mechanism are arranged on two sides of the lower die, and fourth slotted holes corresponding to the third slotted holes are arranged on two sides of the upper die.
The elastic clamping mechanisms are symmetrically arranged in two groups, and each group of elastic clamping mechanisms is distributed in a triangular shape.
The elastic clamping mechanism comprises a mounting column fixedly connected to the lower die, a high-temperature-resistant spring is sleeved on the mounting column, and a limiting end is arranged at the top end of the mounting column and is connected with a clamping plate fixedly connected to the upper die in a clamping mode.
Compared with the prior art, the method and the tool for improving the welding rate of the pipe nozzle and the rib plate flanging hole, disclosed by the invention, improve the existing welding method of the pipe nozzle of the radiator and the rib plate flanging hole, firstly improve the flaring riveting mode of the existing pipe nozzle and the rib plate flanging hole, reduce the assembly gap between the pipe nozzle and the flanging hole, and combine the corresponding tool to ensure that the pipe nozzle and the flanging hole are assembled in a press-fitting mode without flaring riveting; secondly, make the mouthpiece down during welding, not only welding quality is better, and combines the supporting mechanism who increases on the frock to hold the mouthpiece terminal surface, prevents that the mouthpiece from falling under the action of gravity during the welding, and the operation is very convenient high-efficient.
The invention has the beneficial effects that:
(1) the invention has simple structure, low cost and high operation convenience, can efficiently complete the assembly of each part of the radiator by combining the corresponding tool, saves time and labor in assembly, ensures high assembly precision of each part, and meets the welding positioning requirement of the product.
(2) By the invention, the welding surface of the pipe nozzle and the rib plate flanging hole keeps uniform welding clearance; the pipe nozzle is welded downwards, and during welding, the brazing filler metal on the rib plate flows downwards, so that sufficient brazing filler metal is obtained on the welding surface of the pipe nozzle and the flanging hole, the height of a welding area reaches 2.5mm, and the welding rate reaches over 90%. The welding strength is obviously improved, the welding quality is good, the service life is long, and the qualification rate of finished products is high.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic perspective view of a conventional IGBT heat sink.
Fig. 2 is a schematic front structural view of the present invention.
Fig. 3 is a schematic perspective view of the present invention.
Fig. 4 is a partially enlarged structural diagram of a portion a in fig. 2.
Fig. 5 is a partially enlarged structural diagram of part B in fig. 2.
Fig. 6 is a partially enlarged structural view of a portion C in fig. 3.
Fig. 7 is a schematic perspective view of a welding jig according to the present invention.
FIG. 8 is a schematic view of the profile of the welding clamp of the present invention.
Fig. 9 is a schematic structural view of the lower splint of the present invention.
Fig. 10 is a schematic structural view of the upper splint of the present invention.
FIG. 11 is a schematic view of a card board of the present invention.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
As shown in fig. 1, the existing IGBT radiator includes a rib plate 101, the rib plate 101 is a cover plate and a bottom plate of the radiator, a corrugated plate is disposed between the cover plate and the bottom plate, a flanged hole is disposed on the rib plate 101, a nozzle 102 is inserted into the flanged hole, so that the radiator is assembled by multiple parts, and is formed into a whole by vacuum brazing, a plurality of circular holes 103 are disposed on the rib plate 101, and the shape of the rib plate 101 and the corrugated plate and the hole positions of the circular holes 103 on the rib plate are required to be consistent during welding.
As shown in fig. 2-11, the method for improving the welding rate of the nozzle and the rib plate flanging hole, disclosed by the invention, specifically comprises the following steps:
s1, machining the flanging hole on the rib plate to ensure that the aperture d of the flanging hole is = phi A +0.02 +0.01,
wherein phi A is the outer diameter of the nozzle of the radiator;
s2, assembling and combining the nozzle and the flanging hole in a press-fitting mode;
s3, arranging the nozzle downwards relative to the rib plate, and welding the splicing parts of the nozzle and the rib plate by adopting a vacuum brazing technology;
wherein, the pipe nozzle is welded downwards, and the brazing filler metal on the rib plate flows downwards during welding, so that sufficient brazing filler metal is obtained on the welding surface of the pipe nozzle and the flanging hole; the height of the welding area reaches 2.5mm, and the welding rate reaches more than 90%.
The tool based on the method comprises a press-fitting machine 2, wherein a welding clamp 4 is arranged on a working table surface 21 of the press-fitting machine 2, a press-fitting mechanism 3 opposite to the welding clamp 4 is arranged right above the welding clamp 4, and the press-fitting mechanism 3 is connected with a press-fitting driving mechanism of the press-fitting machine 2.
The press-fitting mechanism 3 comprises a press-fitting head 31, and a guide part 32 matched with the inner hole of the nozzle is arranged at the center of the bottom surface of the press-fitting head 31.
The press-fitting head 31 is a rubber sleeve, the guide part 32 is nested in the rubber sleeve, and a conical guide head is arranged at the top end of the guide part 32.
The welding fixture 4 comprises a lower die 41, an upper die 42, a lower clamping plate 43 and an upper clamping plate 44 which are oppositely arranged, wherein the lower clamping plate 43 and the upper clamping plate 44 are matched with the IGBT radiator 1, and the lower clamping plate 43 and the upper clamping plate 44 are fixedly connected between the lower die 41 and the upper die 42 through a plurality of groups of elastic clamping mechanisms 46; and a support mechanism 45 for supporting the nozzle 102 is provided on the bottom surface of the lower plate 43.
A sinking groove 431 matched with the shape of the rib plate 101 of the IGBT radiator is arranged in the middle of the lower clamp plate 43, first slot holes 432 matched with the nozzles 102 are arranged on two sides of the sinking groove, and the supporting mechanism 45 is fixedly connected to the bottom surface of the lower clamp plate 43 and is positioned on the same axis with the first slot holes 432; when assembling, firstly, the nozzle 102 passes through the first slotted hole 432 on the lower clamping plate from top to bottom, and the lower end surface of the nozzle 102 abuts against the supporting mechanism 45; and then the rib plate 101 is placed on the lower clamping plate 43 to ensure that the flanging hole of the rib plate is consistent with the hole position of the nozzle 102, finally the press-fitting machine 2 is started to enable the press-fitting mechanism 3 to move downwards, the guide part 32 of the press-fitting mechanism 3 and the nozzle 102 realize guide, and meanwhile, the press-fitting head 31 presses the rib plate 101 downwards to finish the assembly operation of the nozzle 102 and the flanging hole. And the second slots 441 corresponding to the first slots 432 are provided on both sides of the upper clip 44, which facilitates the downward movement of the press-fitting mechanism 3 without interference when assembling other parts of the IGBT heat sink 1.
The lower clamping plate 43 and the upper clamping plate 44 are correspondingly provided with positioning holes 1.1 which are consistent with the hole positions of the round holes 103 on the IGBT radiator, so that accurate positioning is realized when other parts of the IGBT radiator 1 are assembled.
The lower clamping plate 43 and the upper clamping plate 44 are made of 1Cr18Ni9Ti, and graphite plates are embedded in the opposite surfaces of the lower clamping plate 43 and the upper clamping plate 44. The two are combined by adopting 1Cr18Ni9Ti and graphite, and have the characteristics of good thermal conductivity, small specific heat capacity and small density. The main material of lower clamp plate 43 and upper clamp plate 44 is 1Cr18Ni9Ti, guarantees the requirement of anchor clamps rigidity, and graphite plate and IGBT radiator 1 are laminated mutually, guarantees the flatness requirement after IGBT radiator 1 assembles.
The supporting mechanism 45 is a U-shaped frame structure and can be fixedly connected to the bottom surface of the lower clamping plate 43 through bolts or fixedly connected to the bottom surface of the lower clamping plate 43 through welding.
The U-shaped frame structure includes a base plate 451 and connection plates 452 disposed at both sides of the base plate.
The lower die 41 and the upper die 42 are both of U-shaped groove steel structures, weight is reduced, stacking is facilitated, and furnace charging amount is increased.
The middle parts of the lower die 41 and the upper die 42 are respectively provided with a weight reduction groove 1.2, and the weight reduction grooves are formed to ensure that the weight reduction device is light and easy to carry.
The elastic clamping mechanisms 46 are symmetrically arranged in two groups, and each group of elastic clamping mechanisms 46 is distributed in a triangular shape. Enough pressure is continuously applied to the IGBT radiator 1 in the welding process, the thermal deformation of the IGBT radiator 1 is overcome, and the brazing rate and the flatness requirements of the IGBT radiator 1 are met.
The elastic clamping mechanism 46 includes a mounting post 461 fixedly connected to the lower die 41, a high temperature resistant spring 462 is sleeved on the mounting post 461, and a limit end 4611 is arranged at the top end of the mounting post 461 and is clamped with a clamp plate 463 fixedly connected to the upper die 42.
A waist-round hole 4631 is formed in the clamping plate 463, so that the clamping plate is fixedly connected to the upper die 42 through an adjusting screw 464; be equipped with the draw-in groove 4632 with spacing end 4611 looks adaptation on the erection column on cardboard 463, draw-in groove 4632 is formed by erection ring groove and chucking annular transition, during the installation, unscrews adjusting screw 464, and in the spacing end 4611 of erection column inserted the erection ring groove, remove cardboard 463 and make erection column 461 block go into the chucking annular, screw up adjusting screw 464 again, can accomplish the installation fixed.
A hiding groove 4633 corresponding to the IGBT heat sink nozzle 102 and the circular hole 103 is provided in the card 463.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention without departing from the technical spirit of the present invention are within the scope of the present invention.
Claims (10)
1. A method for improving the welding rate of a pipe nozzle and a rib plate flanging hole is characterized by comprising the following steps:
s1, machining the flanging hole on the rib plate to ensure that the aperture d of the flanging hole is = phi A +0.02 +0.01,
wherein phi A is the outer diameter of the nozzle of the radiator;
s2, assembling and combining the nozzle and the flanging hole in a press-fitting mode;
s3, arranging the nozzle downwards relative to the rib plate, and welding the splicing parts of the nozzle and the rib plate by adopting a vacuum brazing technology;
wherein, the mouthpiece welds downwards, and during the welding, the brazing filler metal on the gusset flows downwards, makes the mouthpiece obtain sufficient brazing filler metal with the face of weld in turn-ups hole.
2. A tooling based on the method of claim 1, comprising a press (2), characterized in that: a welding clamp (4) is arranged on a working table top (21) of the press-fitting machine (2), a press-fitting mechanism (3) opposite to the welding clamp (4) is arranged right above the welding clamp, and the press-fitting mechanism (3) is connected with a press-fitting driving mechanism of the press-fitting machine (2).
3. The tooling of claim 2, wherein: the press-fitting mechanism (3) comprises a press-fitting head (31), and a guide part (32) matched with the inner hole of the nozzle is arranged at the center of the bottom surface of the press-fitting head (31).
4. The tooling of claim 3, wherein: the press-fitting head (31) is a rubber sleeve, the guide part (32) is nested in the rubber sleeve, and a conical guide head is arranged at the top end of the guide part (32).
5. The tooling of claim 2, wherein: the welding fixture (4) comprises a lower die (41), an upper die (42), a lower clamping plate (43) and an upper clamping plate (44) which are oppositely arranged, wherein the lower clamping plate (43) and the upper clamping plate (44) are matched with the IGBT radiator (1), and the lower clamping plate (43) and the upper clamping plate (44) are fixedly connected between the lower die (41) and the upper die (42) through a plurality of groups of elastic clamping mechanisms (46); and a supporting mechanism (45) for supporting the nozzle (102) is arranged on the bottom surface of the lower clamping plate (43).
6. The tooling of claim 5, wherein: a sinking groove (431) matched with the shape of the IGBT radiator rib plate (101) is formed in the middle of the lower clamping plate (43), a first slotted hole (432) matched with the nozzle (102) is formed in the two sides of the lower clamping plate, and the supporting mechanism (45) is fixedly connected to the bottom surface of the lower clamping plate (43) and is positioned on the same axis with the first slotted hole (432); and second slotted holes (441) corresponding to the first slotted holes (432) are arranged on two sides of the upper clamping plate (44).
7. The tooling of claim 6, wherein: the supporting mechanism (45) is of a U-shaped frame structure and is fixedly connected to the bottom surface of the lower clamping plate (43) through bolts or fixedly connected to the bottom surface of the lower clamping plate (43) through welding.
8. The tooling of claim 5, wherein: third slots (411) for preventing the interference of the supporting mechanism (45) are arranged on two sides of the lower die (41), and fourth slots (421) corresponding to the third slots (411) are arranged on two sides of the upper die (42).
9. The tooling of claim 5, wherein: the elastic clamping mechanisms (46) are symmetrically arranged in two groups, and each group of elastic clamping mechanisms (46) is distributed in a triangular shape.
10. The tooling of claim 9, wherein: the elastic clamping mechanism (46) comprises a mounting column (461) fixedly connected to the lower die (41), a high-temperature-resistant spring (462) is sleeved on the mounting column (461), and a limiting end (4611) is arranged at the top end of the mounting column (461) and is clamped with a clamping plate (463) fixedly connected to the upper die (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929886.3A CN111843085B (en) | 2020-09-07 | 2020-09-07 | Method and tool for improving welding rate of flanging hole of nozzle and rib plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929886.3A CN111843085B (en) | 2020-09-07 | 2020-09-07 | Method and tool for improving welding rate of flanging hole of nozzle and rib plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111843085A true CN111843085A (en) | 2020-10-30 |
| CN111843085B CN111843085B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010929886.3A Active CN111843085B (en) | 2020-09-07 | 2020-09-07 | Method and tool for improving welding rate of flanging hole of nozzle and rib plate |
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| CN (1) | CN111843085B (en) |
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| CN109483001A (en) * | 2018-12-28 | 2019-03-19 | 湖北赛格瑞新能源科技有限公司 | A kind of welding equipment and welding method for micro thermoelectric device |
| CN211387285U (en) * | 2019-12-02 | 2020-09-01 | 山东海力同创散热制冷技术开发有限公司 | Brazing tool for IGBT radiator |
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| CN111843085B (en) | 2024-03-12 |
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