CN116441657A - Ultra-thin sheet metal part and machining part combined brazing gap control method - Google Patents
Ultra-thin sheet metal part and machining part combined brazing gap control method Download PDFInfo
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- CN116441657A CN116441657A CN202310478053.3A CN202310478053A CN116441657A CN 116441657 A CN116441657 A CN 116441657A CN 202310478053 A CN202310478053 A CN 202310478053A CN 116441657 A CN116441657 A CN 116441657A
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- 239000002184 metal Substances 0.000 title claims abstract description 143
- 238000005219 brazing Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000003754 machining Methods 0.000 title claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 71
- 239000000945 filler Substances 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 6
- 229910000679 solder Inorganic materials 0.000 claims description 18
- 238000004146 energy storage Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- 238000012797 qualification Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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
- B23K1/008—Soldering within a furnace
-
- 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
Abstract
The invention discloses a method for controlling a brazing clearance of an ultrathin sheet metal part and an machined part, wherein the sheet metal part is provided with an inner hole which is attached to an outer ring of the machined part, the technical requirement on the roundness of the inner hole of the sheet metal part is B, and the technical requirement on the size of the outer ring of the machined part isThe control method comprises the following steps: s1, measuring the inner diameters of an inner hole opening part, a middle part and a root part of a sheet metal part to obtain an inner diameter minimum value phi Min and an inner diameter maximum value phi Max; s2, machining and matching the dimension phi A of the vehicle according to phi Max+x 1 ≤φA≤φMin+x 2 Proceeding; s3, ensuring roundness C when the sheet metal part and the machining part are assembled, and C<B, a step of preparing a composite material; s4, covering a circle of brazing filler metal sheet with the thickness of D on the welding surface of the machined part after the vehicle is matched, and attaching the machined part covered with the brazing filler metal sheet to the sheet metal part in place so as to confirm the matching effect of the sheet metal part and the machined part; and d=c; s5, entering the follow-upAnd (5) welding flow. The control method can effectively control the gap of the part to be welded in the processing process, can conveniently and accurately carry out inspection and judgment, improves the one-time processing and welding qualification rate of parts, and ensures the quality of welding seams.
Description
Technical Field
The invention relates to the technical field of brazing of aero-engine parts, in particular to a method for controlling a brazing gap of an ultrathin sheet metal part and an machined part.
Background
Brazing is a process in which brazing filler metal, which is lower than the melting point of a base metal, is heated to its melting temperature, causing the brazing filler metal to flow under capillary action and filling the entire joint gap. The gap at the joint part not only affects the quality of the welding seam of the braze welding joint, but also affects the strength of the welding seam, so that the proper joint gap has important significance for improving the quality of the welding seam.
The flame tube of the aeroengine of a certain model consists of a thin-walled sheet metal part and a machined circular ring in a brazing way, as shown in an attached figure 3 of the specification, the brazing part is the matching part of the sheet metal part and the machined circular ring, and as the sheet metal part is a thin-walled part (the wall thickness is 0.8 mm), the roundness and the rigidity are poor, and the gap between the joint parts of two single parts is difficult to meet the brazing requirement.
In order to ensure the brazing quality of the part, the joint clearance needs to be controlled, and the ideal brazing clearance is 0.02-0.08 mm for high-temperature alloy. In actual production, because the hole roundness of the matched part of the sheet metal part is poor, the size of a possible opening part is small, the size of the middle part is bigger, when the sheet metal part and the sheet metal part are matched, the sheet metal part cannot be plugged in due to the fact that the sheet metal part and the sheet metal part are matched, the gap between the sheet metal part and the sheet metal part is bigger, the part needs repeated matching reworking to ensure a brazing gap, and the brazing gap is poor due to uneven gap distribution, so that the gap is difficult to fill in the part due to overlarge brazing filler metal, the leakage risk is increased, and the brazing qualification rate is seriously affected.
The publication CN113305390a discloses a vacuum brazing method of an interference fit gap, which includes a first fitting, a second fitting and a brazing groove, comprising the steps of: selecting a workpiece; cleaning and drying; assembling a workpiece; and (5) feeding into a furnace for brazing. According to the vacuum brazing method for the interference fit gap, the two brazing filler metal rings are fixed by the brazing filler metal groove between the first assembly part and the second assembly part, and the welding gap which is difficult to ensure is controlled by controlling the interference magnitude by utilizing the difference of the thermal expansion coefficients of different materials, so that the welding seam is uniform, the qualification rate of the size is improved, the welding quality is ensured, the rejection rate of products is reduced, the structure is simple and convenient, the operation is easy, and the method for controlling the welding seam uniformity in the existing vacuum welding is innovated.
Although the above patent is designed for a brazing gap, a brazing ring is embedded between a first assembly part and a second assembly part, but the brazing ring is fixed by arranging a brazing groove, which cannot be applied to the brazing design of a flame tube structure on an aeroengine, and the first assembly part of the patent is not a thin-wall part, and the defect that the roundness difference of the opening part, the middle part and the root part of a thin-wall sheet metal part on the flame tube is large does not exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for controlling the combined brazing gap of an ultrathin sheet metal part and an machined part, which can effectively control the gap of a part to be welded in the machining process.
The aim of the invention is achieved by the following technical scheme:
a method for controlling the combined brazing gap of an ultrathin sheet metal part and an machined part comprises the steps that an inner hole of the sheet metal part is attached to an outer ring of the machined part, the technical requirement on roundness of the inner hole of the sheet metal part is B, and the technical requirement on size of the outer ring of the machined part isThe control method comprises the following steps:
s1, measuring the inner diameters of an inner hole opening part, a middle part and a root part of a sheet metal part to obtain an inner diameter minimum value phi Min and an inner diameter maximum value phi Max;
s2, machining and matching the dimension phi A of the vehicle according to phi Max+x 1 ≤φA≤φMin+x 2 Proceeding;
s3, ensuring roundness C when the sheet metal part and the machining part are assembled, wherein C is smaller than B;
s4, covering a circle of brazing filler metal sheet with the thickness of D on the welding surface of the machined part after the vehicle is matched, and attaching the machined part covered with the brazing filler metal sheet to the sheet metal part in place so as to confirm the matching effect of the sheet metal part and the machined part; and d=c;
s5, entering a subsequent welding process.
Further, the technical requirement B on the roundness of the inner hole of the sheet metal part is ensured by adopting mechanical processing spinning.
Further, B was 0.05mm and C was 0.04mm.
Further, the solder sheet material is BNi82C2rSiB.
Further, the attaching in place in S4 means: after the machine adds the piece and the sheet metal part is attached, the attached part is inverted to the opening part, the middle part and the root part of the sheet metal part to be in a sequential state from bottom to top, and the machine adds the piece at the moment and does not automatically fall off, but can gradually slide down and fall off together with the brazing filler metal piece through knocking.
Further, the welding process in S5 is as follows:
s51, positioning the brazing filler metal sheet at a part to be welded of the machined part by adopting an energy storage spot welding method;
s52, heating the sheet metal part, then combining the machine part, and performing spot welding and positioning at multiple points;
s53, adding paste solder to the matching position of the sheet metal part and the mechanical part, and baking;
s54, welding in a vacuum furnace.
Further, the spot welding pitch of the solder sheet in S51 is 8 to 12mm.
Further, the energy storage spot welding method is adopted for spot welding in S52.
Still further, the point welding is symmetrical between 6 and 8 points in S52.
Further, the sheet metal part in S52 is heated to 140-160 ℃.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the outer diameter size of the machining part of the car matching machine is measured by measuring the inner diameter of each part of the inner hole of the thin-wall sheet metal part and combining the tolerance of the machining part by taking the minimum value and the maximum value as references, so that the clearance requirement is ensured; the brazing filler metal sheet with the same thickness as the roundness requirement during the preparation is covered on the outer ring of the machined part, so that whether the gap meets the requirement is judged through the tightness of the matched sheet metal part;
the control method can effectively control the gap of the part to be welded in the processing process, can conveniently and accurately carry out inspection and judgment, avoids the quality problem treatment after repeated reworking and unqualified in the traditional brazing operation, improves the one-time processing and welding qualification rate of parts, and ensures the quality of welding seams.
Drawings
FIG. 1 is a half-sectional view of the sheet metal part described in example 1;
FIG. 2 is a cross-sectional view of the machined part described in example 1;
fig. 3 is a schematic diagram of welding of the sheet metal part and the machined part in example 1.
Detailed Description
In order to clearly illustrate the technical characteristics of the present solution, the following detailed description will explain the present solution by means of specific embodiments and with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and thus the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," etc. indicate or refer to an azimuth or a positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
The method for controlling the brazing clearance of the combination of the ultrathin sheet metal part and the machined part of the flame tube of the aeroengine is provided, the sheet metal part is shown in a graph 1, the machined part is shown in a graph 2, the sheet metal part is provided with an inner hole which is attached to an outer ring of the machined part, the roundness technical requirement of the inner hole of the sheet metal part is 0.05, the spinning correction of a turning working procedure is added before the matching and combination to ensure the roundness and the diameter of 0.05mm of the sheet metal part, and the size technical requirement of the outer ring of the machined part is as followsThe control method comprises the following steps:
s1, measuring actual inner diameters of an inner hole opening part, a middle part and a root part of a sheet metal part to obtain an inner diameter minimum value phi Min and an inner diameter maximum value phi Max;
s2, machining the dimension phi A of the spare part and the vehicle according to phi Max-0.08-phi A-phi Min-0.04 to ensure the clearance requirement;
s3, before the sheet metal part and the machined part are matched and machined, the clamping of the part is easy, the roundness is not more than 0.04, the soft claw is not allowed to be used for supporting, and a turning clamp is needed for machining;
s4, after the vehicle is matched, covering a circle of solder sheet with the thickness of 0.04mm and made of BNI82C2rSiB on the welding surface of the machined part according to the size of the brazing surface, and completely attaching the machined part covered with the solder sheet and the sheet metal part in place to confirm the matching effect of the sheet metal part and the machined part;
wherein, laminating in place means: after the machine part and the sheet metal part are attached, the attached part is inverted to a state that the opening, the middle part and the root of the sheet metal part are in a sequence from bottom to top, the sheet metal part is supported, the machine part does not automatically fall off when a vertical horse is added at the moment, and the machine part does not fall off when the machine part is knocked by force due to interference fit; the outer ring of the feeding part of the point force knocking machine gradually slides downwards, and the whole feeding part ring and the brazing filler metal sheet fall down together after the point force knocking machine is knocked for several times, so that the requirement can be met.
S5, entering a subsequent welding process:
firstly, S4, after matching, packing sheet metal parts and machine parts separately, and packing the sheet metal parts and the machine parts, ensuring a matched gap, cleaning a joint part by dipping clean white silk cloth in acetone before welding, and finally formally entering a welding process:
s51, positioning the brazing filler metal sheet at a part to be welded of the machined part in a spot welding mode by adopting an energy storage spot welding method, densely positioning the brazing filler metal sheet in whole circle, and taking the spot welding distance of the brazing filler metal sheet to be 8mm to ensure that the brazing filler metal sheet cannot be separated;
s52, heating the sheet metal part to 140 ℃ and then adding the sheet metal part by a combined machine, and spot welding and positioning at multiple points by adopting an energy storage spot welding method, wherein the spot welding is symmetrical to 6-8 points;
s53, adding paste solder to the matching position of the sheet metal part and the mechanical part, and then putting the paste solder into an oven for baking;
s54, after baking, placing the matched parts into a vacuum furnace for welding.
The control method can effectively control the gap of the part to be welded in the processing process, can conveniently and accurately carry out inspection and judgment, improves the one-time processing and welding qualification rate of parts, and ensures the quality of welding seams.
Example 2
A brazing clearance control method for an ultrathin sheet metal part and an machined part combination is provided, wherein the sheet metal part is shown in a structure in figure 1, the machined part is shown in a structure in figure 2, the sheet metal part is provided with an inner hole which is attached to an outer ring of the machined part, the technical requirement on roundness of the inner hole of the sheet metal part is 0.05, the spinning correction of a turning working procedure is added before the sheet metal part is attached to the outer ring of the machined part, the roundness and the diameter of the sheet metal part are guaranteed by 0.05mm, and the technical requirement on the dimension of the outer ring of the machined part isThe control method comprises the following steps:
s1, measuring actual inner diameters of an inner hole opening part, a middle part and a root part of a sheet metal part to obtain an inner diameter minimum value phi Min and an inner diameter maximum value phi Max;
s2, machining the dimension phi A of the spare part and the vehicle according to phi Max-0.08-phi A-phi Min-0.04 to ensure the clearance requirement;
s3, before the sheet metal part and the machined part are matched and machined, the clamping of the part is easy, the roundness is not more than 0.04, the soft claw is not allowed to be used for supporting, and a turning clamp is needed for machining;
s4, after the vehicle is matched, covering a circle of solder sheet with the thickness of 0.04mm and made of BNI82C2rSiB on the welding surface of the machined part according to the size of the brazing surface, and completely attaching the machined part covered with the solder sheet and the sheet metal part in place to confirm the matching effect of the sheet metal part and the machined part;
wherein, laminating in place means: after the machine part and the sheet metal part are attached, the attached part is inverted to a state that the opening, the middle part and the root of the sheet metal part are in a sequence from bottom to top, the sheet metal part is supported, the machine part does not automatically fall off when a vertical horse is added at the moment, and the machine part does not fall off when the machine part is knocked by force due to interference fit; the outer ring of the feeding part of the point force knocking machine gradually slides downwards, and the whole feeding part ring and the brazing filler metal sheet fall down together after the point force knocking machine is knocked for several times, so that the requirement can be met.
S5, entering a subsequent welding process:
firstly, S4, after matching, packing sheet metal parts and machine parts separately, and packing the sheet metal parts and the machine parts, ensuring a matched gap, cleaning a joint part by dipping clean white silk cloth in acetone before welding, and finally formally entering a welding process:
s51, positioning a brazing filler metal sheet at a part to be welded of a machining part in a spot welding mode by adopting an energy storage spot welding method, and densely positioning the brazing filler metal sheet in a whole circle, wherein the difference between the embodiment and the embodiment 1 is that: the spot welding distance of the solder sheets is 10mm;
s52, heating the sheet metal part to 140 ℃ and then adding the sheet metal part by a combined machine, and spot welding and positioning at multiple points by adopting an energy storage spot welding method, wherein the spot welding is symmetrical to 6-8 points;
s53, adding paste solder to the matching position of the sheet metal part and the mechanical part, and then putting the paste solder into an oven for baking;
s54, after baking, placing the matched parts into a vacuum furnace for welding.
Example 3
The method for controlling the brazing clearance of the ultra-thin sheet metal part and the machined part in a combined mode is provided, the sheet metal part is shown in a structure shown in a figure 1, the machined part is shown in a structure shown in a figure 2, the sheet metal part is provided with an inner hole which is attached to an outer ring of the machined part, the technical requirement on roundness of the inner hole of the sheet metal part is 0.05, the spinning correction of a turning working procedure is added before the matching and combination to ensure the roundness and the diameter of the sheet metal part to be 0.05mm, and the technical requirement on the dimension of the outer ring of the machined part is as followsThe control method comprises the following steps:
s1, measuring actual inner diameters of an inner hole opening part, a middle part and a root part of a sheet metal part to obtain an inner diameter minimum value phi Min and an inner diameter maximum value phi Max;
s2, machining the dimension phi A of the spare part and the vehicle according to phi Max-0.08-phi A-phi Min-0.04 to ensure the clearance requirement;
s3, before the sheet metal part and the machined part are matched and machined, the clamping of the part is easy, the roundness is not more than 0.04, the soft claw is not allowed to be used for supporting, and a turning clamp is needed for machining;
s4, after the vehicle is matched, covering a circle of solder sheet with the thickness of 0.04mm and made of BNI82C2rSiB on the welding surface of the machined part according to the size of the brazing surface, and completely attaching the machined part covered with the solder sheet and the sheet metal part in place to confirm the matching effect of the sheet metal part and the machined part;
wherein, laminating in place means: after the machine part and the sheet metal part are attached, the attached part is inverted to a state that the opening, the middle part and the root of the sheet metal part are in a sequence from bottom to top, the sheet metal part is supported, the machine part does not automatically fall off when a vertical horse is added at the moment, and the machine part does not fall off when the machine part is knocked by force due to interference fit; the outer ring of the feeding part of the point force knocking machine gradually slides downwards, and the whole feeding part ring and the brazing filler metal sheet fall down together after the point force knocking machine is knocked for several times, so that the requirement can be met.
S5, entering a subsequent welding process:
firstly, S4, after matching, packing sheet metal parts and machine parts separately, and packing the sheet metal parts and the machine parts, ensuring a matched gap, cleaning a joint part by dipping clean white silk cloth in acetone before welding, and finally formally entering a welding process:
s51, positioning a brazing filler metal sheet at a part to be welded of a machining part in a spot welding mode by adopting an energy storage spot welding method, and densely positioning the brazing filler metal sheet in a whole circle, wherein the difference between the embodiment and the embodiment 1 is that: the spot welding distance of the solder sheets is 12mm;
s52, heating the sheet metal part to 140 ℃ and then adding the sheet metal part by a combined machine, and spot welding and positioning at multiple points by adopting an energy storage spot welding method, wherein the spot welding is symmetrical to 6-8 points;
s53, adding paste solder to the matching position of the sheet metal part and the mechanical part, and then putting the paste solder into an oven for baking;
s54, after baking, placing the matched parts into a vacuum furnace for welding.
Example 4
This embodiment differs from embodiment 1 in that: and S52, heating the sheet metal part to 150 ℃ and then combining the machined part.
Example 5
This embodiment differs from embodiment 1 in that: and S52, heating the sheet metal part to 160 ℃ and then combining the machined part.
It is apparent that the above examples are only examples for clearly illustrating the technical solution of the present invention, and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. A method for controlling the combined brazing gap of an ultrathin sheet metal part and an machined part comprises the steps that an inner hole of the sheet metal part is attached to an outer ring of the machined part, the technical requirement on roundness of the inner hole of the sheet metal part is B, and the technical requirement on size of the outer ring of the machined part isThe control method is characterized by comprising the following steps:
s1, measuring the inner diameters of an inner hole opening part, a middle part and a root part of a sheet metal part to obtain an inner diameter minimum value phi Min and an inner diameter maximum value phi Max;
s2, machining and matching the dimension phi A of the vehicle according to phi Max+x 1 ≤φA≤φMin+x 2 Proceeding;
s3, ensuring roundness C when the sheet metal part and the machining part are assembled, wherein C is smaller than B;
s4, covering a circle of brazing filler metal sheet with the thickness of D on the welding surface of the machined part after the vehicle is matched, and attaching the machined part covered with the brazing filler metal sheet to the sheet metal part in place so as to confirm the matching effect of the sheet metal part and the machined part; and d=c;
s5, entering a subsequent welding process.
2. The method for controlling the brazing gap of the ultra-thin sheet metal part and the machined part combination according to claim 1, wherein the technical requirement B for roundness of the inner hole of the sheet metal part is ensured by adopting mechanical processing spinning.
3. The method for controlling the brazing gap of the ultra-thin sheet metal part and the machined part combination according to claim 1, wherein B is 0.05mm and C is 0.04mm.
4. The method for controlling the brazing gap of an ultrathin sheet metal part and an machined part combination according to claim 1, wherein the brazing sheet material is BNi82C2rSiB.
5. The method for controlling the brazing gap of an ultrathin sheet metal part and an machined part combination according to claim 1, wherein the attaching in place in S4 means: after the machine adds the piece and the sheet metal part is attached, the attached part is inverted to the opening part, the middle part and the root part of the sheet metal part to be in a sequential state from bottom to top, and the machine adds the piece at the moment and does not automatically fall off, but can gradually slide down and fall off together with the brazing filler metal piece through knocking.
6. The method for controlling the brazing gap of the ultra-thin sheet metal part and the machined part combination according to claim 1, wherein the welding process in the step S5 is as follows:
s51, positioning the brazing filler metal sheet at a part to be welded of the machined part by adopting an energy storage spot welding method;
s52, heating the sheet metal part, then combining the machine part, and performing spot welding and positioning at multiple points;
s53, adding paste solder to the matching position of the sheet metal part and the mechanical part, and baking;
s54, welding in a vacuum furnace.
7. The method for controlling a brazing gap of an ultrathin sheet metal part and an machined part combination according to claim 6, wherein the spot welding distance of the brazing sheet in the step S51 is 8-12 mm.
8. The method for controlling the brazing gap of the ultra-thin sheet metal part and the machined part according to claim 6, wherein the step S52 is spot-welding by using an energy storage spot welding method.
9. The method for controlling the brazing gap of the ultrathin sheet metal part and the machined part combination according to claim 8, wherein the spot welding is symmetrical at 6-8 points in S52.
10. The method for controlling the brazing gap of the ultra-thin sheet metal part and the machined part combination according to claim 6, wherein the sheet metal part is heated to 140-160 ℃ in the step S52.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310478053.3A CN116441657A (en) | 2023-04-28 | 2023-04-28 | Ultra-thin sheet metal part and machining part combined brazing gap control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310478053.3A CN116441657A (en) | 2023-04-28 | 2023-04-28 | Ultra-thin sheet metal part and machining part combined brazing gap control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116441657A true CN116441657A (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310478053.3A Pending CN116441657A (en) | 2023-04-28 | 2023-04-28 | Ultra-thin sheet metal part and machining part combined brazing gap control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN116441657A (en) |
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2023
- 2023-04-28 CN CN202310478053.3A patent/CN116441657A/en active Pending
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