CN110216348B - Support structure of thin-wall asymmetric device in brazing furnace and brazing method thereof - Google Patents
Support structure of thin-wall asymmetric device in brazing furnace and brazing method thereof Download PDFInfo
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- CN110216348B CN110216348B CN201910556079.9A CN201910556079A CN110216348B CN 110216348 B CN110216348 B CN 110216348B CN 201910556079 A CN201910556079 A CN 201910556079A CN 110216348 B CN110216348 B CN 110216348B
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
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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
- 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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- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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Abstract
The invention discloses a supporting structure of a thin-wall asymmetric device in a brazing furnace and a brazing method thereof, belonging to the technical field of hot working, wherein a supporting block, a supporting plate and a fireproof supporting strip are arranged corresponding to a furnace door supporting rod, and a heat distribution block is arranged corresponding to a thin-wall cavity of the device to be brazed, so that the stable arrangement of the thin-wall asymmetric device to be brazed in the brazing furnace can be effectively realized, the melting damage of the top of the thin-wall asymmetric device caused by over-fast temperature rise in the brazing process is prevented, and the fast, stable and batch brazing of the thin-wall asymmetric device is realized. The invention is suitable for the supporting structure of the thin-wall asymmetric device, has simple structure, convenient disassembly and assembly and high stability in the brazing process, can quickly realize batch loading, brazing and material taking of the thin-wall asymmetric device in a brazing furnace, greatly improves the brazing efficiency and brazing quality of the thin-wall asymmetric device, reduces the forming cost of the thin-wall asymmetric device and the application cost of the waveguide device, and has better application prospect and popularization value.
Description
Technical Field
The invention belongs to the technical field of hot working, and particularly relates to a supporting structure of a thin-wall asymmetric device in a brazing furnace and a brazing method thereof.
Background
In the fields of radio communication, radar, navigation and the like, thin-wall aluminum alloy asymmetric structure devices are widely applied, are often formed by welding thin-wall cavities in various shapes and bottom plates, are basic devices with energy conversion and directional radiation or receiving functions, have large structural form difference, and are often asymmetric structures with one side opened and the other side closed, as shown in fig. 2.
In the design and preparation processes of the waveguide device, a plurality of device arrays are often needed to be used, so that the required number of thin-wall aluminum alloy asymmetric structural devices is large. In order to reduce the application cost of the waveguide device, higher requirements are put forward on the application cost of the thin-wall asymmetric device.
At present, for units with smaller volume, due to the limitation of an asymmetric structure, most of thin-wall aluminum alloy asymmetric devices are brazed by adopting a manual flame brazing mode, although brazing can be realized to a certain extent by the mode, the brazing efficiency of the devices is low, the preparation cost of the devices is high, the manual brazing mode has higher technical requirements on operators, great human errors exist in manual brazing, the brazing quality is uneven, and the production efficiency is low; although a vacuum brazing furnace can be used for forming the thin-wall aluminum alloy asymmetric device in the prior art to improve the forming quality of the device, the application cost of the vacuum brazing furnace is high, the forming efficiency is low, the forming cost of the asymmetric device cannot be effectively reduced, and the high-efficiency batch production of a single unit is difficult to realize; in addition, in the prior art, the brazing of the device with a large-size structure or a symmetrical structure can be performed through an air brazing furnace, but the efficiency is low, and for the thin-wall asymmetrical structure part, the temperature of the open end of the thin wall is extremely high and the thin-wall asymmetrical structure part is melted easily in the welding process, so that the device is scrapped, and unnecessary loss is caused.
Disclosure of Invention
Aiming at one or more of the defects or the improvement requirements of the prior art, the invention provides a support structure of a thin-wall asymmetric device in a brazing furnace and a brazing method thereof, wherein a support block, a support plate and a refractory support strip are arranged corresponding to a furnace door support rod of the brazing furnace, and a heat distribution block is correspondingly arranged corresponding to a thin-wall cavity of the device to be brazed, so that the thin-wall asymmetric device to be brazed can be effectively and stably arranged in the brazing furnace, the melting damage of the top of the thin-wall asymmetric device caused by too fast temperature rise in the brazing process is prevented, and the melting damage of the top of the thin-wall asymmetric device is effectively avoided while the brazing efficiency and the brazing quality of the device are greatly improved.
In order to achieve the above objects, in one aspect of the present invention, there is provided a support structure of a thin-walled asymmetric device in a brazing furnace, which is disposed corresponding to a furnace door strut of the brazing furnace, characterized in that,
comprises a supporting block, a supporting plate, a refractory supporting strip and a heat distribution block which are arranged from bottom to top in sequence;
the supporting blocks are of a long strip structure and are at least two at intervals, the top surfaces of the supporting blocks are horizontally arranged, and the supporting blocks can correspondingly stretch across and be erected on at least two furnace door supporting rods; notches are respectively formed in the bottom surfaces of the supporting blocks corresponding to the furnace door supporting rods, so that the supporting blocks can be respectively matched with the corresponding furnace door supporting rods through the notches;
the supporting plate is of a plate-shaped structure and can be horizontally placed above at least two supporting blocks, at least one middle through hole penetrating through two end faces is formed in the middle of the supporting plate along the length direction, and a plurality of pairs of limiting grooves are sequentially formed in the two sides of the middle through hole along the width direction at intervals along the length direction; the limiting groove is formed in the top surface of the supporting plate, is formed to a depth smaller than the thickness of the fire-resistant supporting bar and is correspondingly communicated with the middle through hole;
the refractory support bars are of a long strip structure, two ends of each refractory support bar can be correspondingly embedded into the two limiting grooves which are arranged in pairs respectively, and the distance between every two adjacent refractory support bars is smaller than the width of the device to be brazed, so that the bottom plate of the device to be brazed can be correspondingly placed above the gap between the two refractory support bars;
the heat distribution block is arranged corresponding to the thin-wall cavity of the device to be brazed, is in a plate-shaped structure with a certain thickness, can be correspondingly placed at the top of the thin-wall cavity, and seals the top of the thin-wall cavity.
As a further improvement of the invention, the supporting blocks are two in parallel and spaced.
As a further improvement of the invention, the middle through holes are a plurality of stiffening ribs which are arranged at intervals along the length direction of the supporting plate, and a certain width is formed between every two adjacent middle through holes.
As a further improvement of the invention, two limiting grooves arranged in pairs are aligned along the transverse direction, and the distance between the central lines of two adjacent pairs of limiting grooves is larger than the width of the device to be brazed.
As a further improvement of the invention, the material of the heat distribution block is the same as that of the device to be brazed, and the thickness of the heat distribution block is equal to that of the base plate.
As a further improvement of the invention, the furnace door supporting rod is a cylindrical supporting rod, and the notch formed at the bottom of the supporting block is an arc-shaped notch.
As a further improvement of the present invention, the refractory support strip is made of refractory ceramic, and is further preferably an alumina support strip or a zirconia support strip.
In another aspect of the present invention, a method for brazing a thin-walled asymmetric device in a brazing furnace is provided, which is implemented by using a support structure of the thin-walled asymmetric device in the brazing furnace, and comprises the following steps:
s1: opening a furnace door of the brazing furnace, and arranging at least two supporting blocks above one end of the furnace door supporting rod close to the interior of the furnace at intervals;
s2: adjusting the space between the supporting blocks, and horizontally placing the supporting plates on the supporting blocks to form a supporting plane;
s3: a plurality of the refractory support bars are sequentially arranged on the support plate to form a placing platform of the device to be brazed;
s4: the bottom plate and the thin-wall cavity are sequentially arranged above a gap between every two adjacent refractory support bars from bottom to top, a soldering flux and a soldering flux are correspondingly arranged, and the heat distribution block is correspondingly arranged at the top of the thin-wall cavity to form at least one unit to be soldered;
s5: closing the furnace door, enabling the unit to be brazed on the supporting plane to enter the furnace along with the furnace door supporting rod, and completing the brazing process of the device to be brazed in the brazing furnace;
s6: opening the furnace door, and taking out the brazed device;
s7: and repeating the steps S4-S6 to sequentially complete the brazing of the batch of the devices to be brazed.
As a further improvement of the present invention, the unit to be brazed in step S4 is arranged in a pre-assembly manner, which comprises the following steps:
and sequentially completing the assembly of the bottom plate, the thin-wall cavity and the heat distribution block, correspondingly arranging soldering flux and solder in the thin-wall cavity, and directly feeding the units to be brazed above the two corresponding refractory support bars after the arrangement of the placement platform in the step S3 is completed.
The above-described improved technical features may be combined with each other as long as they do not conflict with each other.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
(1) the support structure of the thin-wall asymmetric device in the brazing furnace is characterized in that the support block, the support plate and the refractory support strip are correspondingly arranged through the furnace door support rod corresponding to the brazing furnace, and the heat distribution block is correspondingly arranged at the top of the thin-wall cavity of the device to be brazed;
(2) according to the support structure of the thin-wall asymmetric device in the brazing furnace, the structure of the support plate is correspondingly arranged, and the middle through hole and the limiting groove are correspondingly formed, so that the refractory support bar can be quickly and stably arranged, a sufficient heat-transmitting space is formed below the bottom plate of the thin-wall asymmetric device during brazing, the temperature rise time of the device is greatly shortened, the brazing efficiency and quality of the bottom plate are improved, and the forming cost and the application cost of the thin-wall asymmetric device are reduced;
(3) the brazing method of the thin-wall asymmetric device in the brazing furnace is realized by utilizing the supporting structure arranged on the furnace door supporting rod, the operation steps are simple, the feeding, brazing and taking processes of the device to be brazed are convenient and fast, the brazing process of the thin-wall asymmetric device can be effectively promoted, the rapid brazing of the devices in batches is realized, the brazing cost of the thin-wall asymmetric device is greatly reduced, the brazing quality of the device is promoted, and the damage to the device in the brazing process is reduced;
(4) according to the brazing method of the thin-wall asymmetric device in the brazing furnace, the device to be brazed is formed into the unit to be brazed in a pre-assembled mode, so that the thin-wall asymmetric device can be rapidly fed in the brazing process, the brazing efficiency of the device is further improved, the brazing cost of the thin-wall asymmetric device is reduced, and the application cost of the waveguide device is further reduced;
(5) the supporting structure of the thin-wall asymmetric device in the brazing furnace has the advantages of simple structure, simplicity and convenience in disassembly and assembly, high setting stability and capability of quickly realizing feeding, brazing and material taking of the thin-wall asymmetric device in the brazing furnace, greatly improving the brazing efficiency of the thin-wall asymmetric device, realizing batch continuous brazing of the device, greatly improving the brazing quality of the device, realizing high-efficiency and stable production of the thin-wall aluminum alloy asymmetric device, reducing the production cost of the thin-wall asymmetric device, further reducing the application cost of the waveguide device, and having better application prospect and popularization value.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a support structure for a thin-walled asymmetric device in a brazing furnace according to an embodiment of the present invention;
FIG. 2 is a schematic view of a device to be brazed in a brazing furnace using a support structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of a support plate structure of the support structure in an embodiment of the invention;
in all the figures, the same reference numerals denote the same features, in particular: 1. the supporting block, 2, the supporting plate, 201, the middle through hole, 202, the limiting groove and 203, the stiffening rib; 3. refractory support bars, 4 heat distribution blocks, 5 devices to be brazed, 501 bottom plates, 502 thin-wall cavities; 6. the furnace door assembly, 601, 602, furnace door strut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The support structure of the thin-walled asymmetric device in the brazing furnace in the preferred embodiment of the present invention is shown in fig. 1, which can be used for brazing several thin-walled asymmetric devices in the brazing furnace as shown in fig. 2. It should be noted that, the asymmetric device described herein means that one end of the device is closed, and the other end is open, and further specifically, the top is open, and the bottom is closed; and the thin-walled asymmetric device in the preferred embodiment is a thin-walled aluminum alloy device.
Specifically, the support structure in the preferred embodiment is arranged corresponding to the oven door assembly 6 as shown in fig. 1, and comprises an oven door 602 in a square plate-shaped structure, at least two oven door struts 601 are arranged in parallel on one side of the oven door 602 facing the inside of the oven, and each oven door strut 601 is arranged in the same horizontal plane and is used for bearing the support structure in the preferred embodiment and feeding the device 5 to be brazed on the support structure into the brazing oven, thereby completing the brazing process of the device 5 to be brazed; further, the oven door struts 601 in the preferred embodiment are two arranged in parallel.
Further, the supporting block 1 in the preferred embodiment is an elongated steel structure, the top surface of which is horizontal, and may be further preferably a rectangular parallelepiped rod-shaped structure, and the supporting block 1 spans over the two oven door struts 601 when in use; correspondingly, the bottom surfaces of the two ends of the supporting block 1 in the preferred embodiment are respectively provided with a notch, and the two ends of the supporting block 1 can be respectively matched on the oven door supporting rod 601 through the notches; further, the oven door support rods 601 in the preferred embodiment are cylindrical rod-shaped, the notches formed at the two ends of the bottom surface of the support block 1 are arc notches, respectively, and the support block 1 is preferably perpendicular to the two oven door support rods 601 when in use; meanwhile, the supporting blocks 1 in the preferred embodiment are two spaced apart along the length direction of the oven door supporting rod 601, the two supporting blocks 1 are arranged in parallel when in use, and a plane for placing the supporting plate 2 is formed above the two supporting blocks 1.
Generally, the number of the oven door support bars 601 and the number of the support blocks 1 are two, because two parallel line segments can accurately determine one surface, thereby ensuring the reliable determination of the support surface of the support structure. Of course, when the number of the oven door struts 601 is plural, the number of the notches formed on the bottom surface of the support block 1 may be correspondingly increased, and the notches formed on the support block 1 longitudinally along the oven door struts 601 may also be preferably formed in other forms according to actual needs, such as a square notch, a polygonal notch, etc., as long as it is ensured that the support block 1 can be correspondingly matched between the two oven door struts 601; in addition, if the actual application needs, the number of the supporting blocks 1 can also be set to be a plurality, and the supporting blocks 1 can also be set to be parallel or not parallel according to the actual needs. Further preferably, in order to improve the stability of the supporting block 1 setting and avoid the sliding of the supporting block 1 after setting, a certain flocculent asbestos may be correspondingly arranged between the notch and the oven door supporting rod 601, so as to adjust the level of the two supporting blocks 1.
Further, as shown in fig. 3, the supporting plate 2 in the preferred embodiment is a steel plate structure with a certain thickness, a middle through hole 201 penetrating through the plate surfaces of the two sides of the supporting plate 2 is formed in the middle of the steel plate structure, a plurality of pairs of limiting grooves 202 communicated with the middle through hole 201 are sequentially arranged on the top surface of the supporting plate 2 along the length direction of the supporting plate 2 at intervals, each pair of limiting grooves 202 includes two limiting grooves respectively arranged on the two sides of the width direction of the middle through hole 201, the width of each limiting groove 202 is formed corresponding to the width of the fire-resistant supporting bar 3, and the depth of each limiting groove is smaller than the thickness of the fire-resistant supporting bar 3, so that the fire-resistant supporting bar 3 can be embedded into the pair of limiting grooves 202 at two ends respectively, the corresponding arrangement of the fire-resistant supporting bar 3 on the supporting plate 2 is realized, and the fire-resistant supporting bar 3 after the corresponding arrangement protrudes from the top surface of the end surface of the supporting plate 2.
Further, in the preferred embodiment, the axes of the refractory support bars 3 are arranged along the width direction of the support plates 2, each refractory support bar 3 is arranged in parallel along the length direction of the support plates 2 at intervals, and the distance between every two adjacent refractory support bars 3 is smaller than the width of the device 5 to be brazed; accordingly, the distance between the axes of two pairs of adjacent limiting grooves 202 is larger than the width of the device 5 to be brazed. Then the device 5 to be brazed can be correspondingly placed above the space between the two refractory support bars 3, and the bottom of the device 5 to be brazed is communicated with the space below the support plate 2, so that heat transmission is facilitated.
It is further preferable that the central through holes 201 are two spaced apart along the length direction of the support plate 2, and a stiffening rib 203 as shown in fig. 3 is formed between the two central through holes 201 to ensure the structural strength of the support plate 2 after the central through holes 201 are opened in the central portion. Obviously, the number of openings of the middle through hole 201 may be plural, that is, the number of the stiffeners 203 may also be plural, according to actual requirements.
Further, the refractory support bars 3 in the preferred embodiment are in the shape of rectangular parallelepiped, and the length thereof is set corresponding to the distance between each pair of the limit grooves 202, so that the refractory support bars 3 can just correspond to match the limit grooves 202 at two ends, thereby realizing the limit of the refractory support bars 3 on the top surface of the support plate 2. Further, the refractory support bars 3 in the preferred embodiment are made of refractory ceramics, such as alumina ceramics (white corundum bars), zirconia ceramics, etc.; in practical application, if no refractory ceramic strip is provided, natural stone strips, oilstone strips, quartz strips and the like can be selected temporarily, but the temporarily used support strips are easy to deform, break and damage and must be checked and replaced frequently.
Further, the device 5 to be brazed in the preferred embodiment is as shown in fig. 2, and includes a plurality of thin-walled cavities 502 arranged in sequence, the top of the device 5 to be brazed needs to be open in practical application, and the bottom of the device 5 to be brazed is correspondingly welded with a bottom plate 501, that is, the brazing of the device 5 to be brazed is actually the brazing of the bottom plate 501 at the bottom of the thin-walled cavity 502. Further, a heat distribution block 4 is arranged at the top of the thin-wall cavity 502, and is preferably in a rectangular plate-shaped structure, and the thickness of the heat distribution block is equivalent to that of the bottom plate 501; meanwhile, the width of the heat distribution block 4 is preferably larger than the width of the thin-wall cavity 502, and the length is larger than the length of the thin-wall cavity 502, so that the heat distribution block 4 can be correspondingly placed on the top of the thin-wall cavity 502 and completely cover the top of the thin-wall cavity 502. Due to the arrangement of the heat distribution block 4, the heat at the top of the thin-wall cavity 502 can be absorbed by the heat distribution block 4 as much as possible, the temperature rise rates of the top and the bottom of the thin-wall cavity 502 are ensured to be consistent as much as possible, and the top of the thin-wall cavity 502 is prevented from being melted when brazing is not completed due to the fact that the temperature rise rate is too high.
In combination with the above-described structure, the device 5 to be soldered can be soldered in a soldering furnace, the soldering furnace in the preferred embodiment is an air furnace, the furnace door support rods 601 are two parallel arranged furnace door support rods, and then the soldering process of the device 5 to be soldered can preferably include the following steps:
s1: opening the furnace door of the brazing furnace, pulling out the furnace door support rod 601 along with the furnace door 602, respectively matching the two support blocks 1 on the furnace door support rod 601 through the notches, and correspondingly adjusting the distance between the two support blocks 1 so that the support plates 2 can be correspondingly placed on the two support blocks 1;
s2: correspondingly embedding a plurality of refractory support bars 3 on the support plate 2 to form a support plane on which a device 5 to be brazed can be correspondingly placed;
s3: a bottom plate 501 and a thin-wall cavity 502 are sequentially arranged on the supporting plane corresponding to the gap between the two refractory supporting strips 3, the thin-wall cavity 502 is correspondingly arranged on the bottom plate 501, soldering flux and solder are arranged on the bottom plate 501 in the thin-wall cavity 502 and/or outside the thin-wall cavity 502, and then a plurality of devices 5 to be soldered consisting of the bottom plate 501 and the thin-wall cavity 502 are arranged on the supporting plane side by side;
s4: the top of each device to be brazed 5 is respectively provided with a heat distribution block 4, so that the top of each thin-wall cavity 502 is sealed by the heat distribution block 4;
in a preferred embodiment, the device 5 to be soldered and the heat distribution block 4 in steps S3 and S4 can be pre-assembled in a pre-assembly manner, that is, the bottom plate 501, the thin-wall cavity 502, the soldering flux, the solder and the heat distribution block 4 are pre-assembled into soldering units, so that after the support plane is set in step S2, the soldering units can be sequentially placed above the space between two adjacent refractory support bars 3, thereby quickly completing the loading of the device 5 to be soldered and improving the soldering efficiency.
S5: after the device 5 to be brazed is arranged on the supporting plane, the furnace door 602 is closed, the device 5 to be brazed on the supporting plane enters the furnace along with the furnace door supporting rod 601, the brazing furnace is further controlled to heat the device to be brazed, and the brazing process of the device 5 to be brazed is completed;
s6: after the brazing is finished, the furnace door 602 is opened, the brazed devices are taken out, next batches of devices to be brazed 5 are correspondingly arranged, and the feeding of a plurality of batches of devices to be brazed 5 can be quickly finished through the pre-assembly of the brazing units, so that the continuous brazing of the batches of devices is realized;
s7: after all the devices are brazed, the brazing furnace is closed, the furnace door is opened, the refractory support bars 3, the support plates 2 and the support blocks 1 are sequentially taken down after brazing filler metal and welding flux are completely solidified, the components are recovered after being cleaned, and the next brazing process is waited.
In the actual application process, 3-5 sleeves of the support structures are arranged, so that the brazing process can be carried out continuously, and each group of support structures can be dismounted without being cleaned, and only the support structures need to be removed if impurities such as welding flux and the like are attached to the surfaces of the support structures; meanwhile, in order to improve the efficiency, the refractory support bar attached with impurities can be turned for 90 degrees or 180 degrees to be continuously used, and the refractory support bar is intensively shoveled after the production of one day is finished, so that the brazing efficiency of the thin-wall asymmetric device can be greatly improved.
The brazing support structure is suitable for the thin-wall aluminum alloy asymmetric structural device, is arranged corresponding to a furnace door supporting rod of a brazing furnace, has simple structure and simple and convenient arrangement, can quickly form a supporting plane of the device to be brazed on the furnace door supporting rod, finishes the quick arrangement of the device to be brazed on the supporting plane, ensures that the bottom of the device to be brazed has enough heat-permeable space through the structure of the supporting plate, can effectively ensure the bottom plate brazing quality of the thin-wall aluminum alloy asymmetric device, prevents the situation that the top of the device is heated too quickly to be melted and scrapped due to the vertical asymmetry of the device, not only can greatly improve the brazing efficiency of the thin-wall asymmetric device, realize the batch continuous brazing of the device, but also can greatly improve the brazing quality of the device, realize the high efficiency and stable production of the thin-wall aluminum alloy asymmetric device and reduce the production cost of the thin-wall aluminum alloy asymmetric device, thereby reducing the application cost of the waveguide device and having better application prospect and popularization value.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A supporting structure of a thin-wall asymmetric device in a brazing furnace is arranged corresponding to a furnace door support rod of the brazing furnace and is characterized in that,
comprises a supporting block, a supporting plate, a refractory supporting strip and a heat distribution block which are arranged from bottom to top in sequence;
the supporting blocks are of a long strip structure and are at least two at intervals, the top surfaces of the supporting blocks are horizontally arranged, and the supporting blocks can correspondingly stretch across and be erected on at least two furnace door supporting rods; notches are respectively formed in the bottom surfaces of the supporting blocks corresponding to the furnace door supporting rods, so that the supporting blocks can be respectively matched with the corresponding furnace door supporting rods through the notches;
the supporting plate is of a plate-shaped structure and can be horizontally placed above at least two supporting blocks, at least one middle through hole penetrating through two end faces is formed in the middle of the supporting plate along the length direction, and a plurality of pairs of limiting grooves are sequentially formed in the two sides of the middle through hole along the width direction at intervals along the length direction; the limiting groove is formed in the top surface of the supporting plate, is formed to a depth smaller than the thickness of the fire-resistant supporting bar and is correspondingly communicated with the middle through hole; the two limiting grooves arranged in pairs are aligned in the transverse direction, and the distance between the central lines of the two adjacent pairs of limiting grooves is larger than the width of a device to be brazed;
the refractory support bars are of a long strip structure, two ends of each refractory support bar can be correspondingly embedded into the two limiting grooves which are arranged in pairs respectively, and the distance between every two adjacent refractory support bars is smaller than the width of the device to be brazed, so that the bottom plate of the device to be brazed can be correspondingly placed above the gap between the two refractory support bars;
the heat distribution block is arranged corresponding to the thin-wall cavity of the device to be brazed, is in a plate-shaped structure with a certain thickness, can be correspondingly placed at the top of the thin-wall cavity, and seals the top of the thin-wall cavity.
2. The support structure for a thin-walled asymmetric device in a brazing furnace as claimed in claim 1, wherein the support blocks are two spaced apart in parallel.
3. The support structure for the thin-wall asymmetric device in the brazing furnace according to claim 1, wherein the central through holes are formed in a plurality at intervals along the length direction of the support plate, and a stiffening rib with a certain width is formed between two adjacent central through holes.
4. The support structure of the thin-wall asymmetric device in the brazing furnace according to any one of claims 1 to 3, wherein the heat distribution block is made of the same material as the device to be brazed, and the thickness of the heat distribution block is equal to that of the bottom plate.
5. The supporting structure of the thin-wall asymmetric device in the brazing furnace according to any one of claims 1 to 3, wherein the furnace door supporting rod is a cylindrical supporting rod, and the notch formed at the bottom of the supporting block is a circular arc notch.
6. A support structure for a thin-walled asymmetric device in a brazing furnace as claimed in any one of claims 1 to 3 wherein the refractory support strip is made of refractory ceramic.
7. The support structure for a thin-walled asymmetric device in a brazing furnace of claim 6, wherein the refractory support strips are alumina support strips or zirconia support strips.
8. A method for brazing a thin-wall asymmetric device in a brazing furnace, which is realized by using the supporting structure of the thin-wall asymmetric device in the brazing furnace according to any one of claims 1 to 7, and comprises the following steps:
s1: opening a furnace door of the brazing furnace, and arranging at least two supporting blocks above one end of the furnace door supporting rod close to the interior of the furnace at intervals;
s2: adjusting the space between the supporting blocks, and horizontally placing the supporting plates on the supporting blocks to form a supporting plane;
s3: a plurality of the refractory support bars are sequentially arranged on the support plate to form a placing platform of the device to be brazed;
s4: the bottom plate and the thin-wall cavity are sequentially arranged above a gap between every two adjacent refractory support bars from bottom to top, a soldering flux and a soldering flux are correspondingly arranged, and the heat distribution block is correspondingly arranged at the top of the thin-wall cavity to form at least one unit to be soldered;
s5: closing the furnace door, enabling the unit to be brazed on the supporting plane to enter the furnace along with the furnace door supporting rod, and completing the brazing process of the device to be brazed in the brazing furnace;
s6: opening the furnace door, and taking out the brazed device;
s7: and repeating the steps S4-S6, and sequentially finishing the brazing of the batch of devices to be brazed.
9. The method for brazing the thin-walled asymmetric device in the brazing furnace according to claim 8, wherein the unit to be brazed in the step S4 is arranged in a pre-assembly manner by the following steps:
and sequentially completing the assembly of the bottom plate, the thin-wall cavity and the heat distribution block, correspondingly arranging soldering flux and solder in the thin-wall cavity, and directly feeding the units to be brazed above the two corresponding refractory support bars after the arrangement of the placement platform in the step S3 is completed.
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