CN115178827A - Spot welding positioning method for vacuum brazing - Google Patents
Spot welding positioning method for vacuum brazing Download PDFInfo
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- CN115178827A CN115178827A CN202210996388.XA CN202210996388A CN115178827A CN 115178827 A CN115178827 A CN 115178827A CN 202210996388 A CN202210996388 A CN 202210996388A CN 115178827 A CN115178827 A CN 115178827A
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- 238000003466 welding Methods 0.000 title claims abstract description 106
- 238000005219 brazing Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims description 27
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 description 8
- 239000000945 filler Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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Classifications
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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
Abstract
The invention discloses a spot welding positioning method for vacuum brazing, wherein a second workpiece is placed on a surface to be welded of a first workpiece side by side and is attached to the first workpiece according to the position relation of the second workpiece when the second workpiece is connected with the first workpiece, a positioning block matched with the connected first workpiece and second workpiece in structure is manufactured according to the structures of the first workpiece and the second workpiece and the position relation of the first workpiece and the second workpiece, the corresponding side surfaces of the first workpiece and the second workpiece are abutted through a supporting surface and a protrusion on the positioning block, the first workpiece and the second workpiece are positioned, the first workpiece and the second workpiece are kept fixed in position, the relative movement of the positions of the first workpiece and the second workpiece cannot be caused by the force applied by spot welding, the connecting effectiveness of the first workpiece and the second workpiece in the brazing process is ensured, the positioning block is used for targeted positioning according to the connecting structure of the first workpiece and the second workpiece, the positioning block is simple in structure and convenient to use.
Description
Technical Field
The invention relates to the technical field of vacuum brazing, in particular to a spot welding positioning method for vacuum brazing.
Background
The vacuum brazing is a connection technology which adopts brazing filler metal with a melting temperature lower than that of a base metal, forms a compact welding joint at a welding temperature lower than a solidus line of a matrix and higher than a liquidus line of the brazing filler metal in a vacuum environment by means of melting, flowing and solidifying of the brazing filler metal, and is widely applied to connection of hot end parts of an aircraft engine. In the manufacture of certain parts of aircraft engines, it is necessary to attach small pieces of bulk material to large pieces. Before furnace loading and brazing, spot welding and positioning are carried out on a workpiece to be welded so as to ensure the dimensional precision of the welded part; meanwhile, the gap of the welding seam needs to be controlled so as to ensure that the solder can completely fill the brazing seam by virtue of capillary action during brazing.
The traditional spot welding positioning adopts a method of manual positioning of a measuring mark or clamping of a complex tool. Because the welding gun and the workpiece need to be properly pressurized during spot welding, the phenomenon that the spot welding effect is influenced by air breakdown caused by tight contact between the welding gun and the workpiece is avoided, and the workpiece positioned by the measuring mark manually is easy to misplace. And the conventional tool is not convenient for large-scale production operation on site due to long design and manufacturing period and complex use flow. In addition, the clearance control of the traditional welding seam is carried out in a clearance control mode by using a feeler gauge, the feeler gauge needs to be taken out after spot welding is finished, no support exists inside the welding seam in the high-temperature brazing process, and the clearance change of the welding seam is very easy to cause.
Patent document CN113414466A discloses a workpiece fixture for furnace brazing, which comprises a base, two top pressure plates, a top pushing structure and a pressing device; the base is provided with a left workpiece positioning groove and a right workpiece positioning groove which are used for placing two workpieces to be brazed; the left workpiece positioning groove and the right workpiece positioning groove extend along the left-right direction and are arranged oppositely; a diversion trench is arranged between the left workpiece positioning slot and the right workpiece positioning slot, the diversion trench extends along the front-back direction, and the diversion trench is used for guiding out redundant brazing filler metal in the brazing process; the two top pressing plates comprise a left top pressing plate and a right top pressing plate, the two top pressing plates are assembled on the base in a sliding mode along the left-right direction in a guiding mode, the two top pressing plates are used for pressing two workpieces to be brazed when the two top pressing plates move in the opposite direction, the structure is complex, the positioning effect is poor, and the workpieces are limited more.
Disclosure of Invention
The invention aims to provide a spot welding positioning method for vacuum brazing, which aims to solve the problems in the prior art, a corresponding positioning block is manufactured according to the matched size structure of two workpieces, and each protruding structure and the supporting surface structure on the positioning block can effectively cling to and position the workpieces, so that the relative displacement of the two workpieces in the spot welding process is avoided, and the whole positioning block has the advantages of simple structure, low cost and convenience in use.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a spot welding positioning method for vacuum brazing, which comprises the following steps:
a preparation stage: preparing two workpieces to be brazed, wherein the two workpieces are divided into a first workpiece and a second workpiece with a structure larger than that of the first workpiece, the first workpiece is placed on a welding platform, the surface to be welded of the first workpiece is arranged upwards, the second workpiece is placed on the surface to be welded of the first workpiece side by side and is attached to the first workpiece according to the position relation when the second workpiece is connected with the first workpiece, the first workpiece comprises a first side surface and a second side surface which are connected, and the second workpiece comprises a third side surface and a fourth side surface which are located on the same side with the first side surface and the second side surface respectively;
forming a welding gap: placing a plurality of positioning pieces between a surface to be welded of a first workpiece and a surface to be welded of a second workpiece, wherein the thickness of each positioning piece is the same as the required welding gap between the two surfaces to be welded, and each positioning piece is uniformly arranged at the edge position of a welding area of the first workpiece and the second workpiece;
manufacturing a positioning tool: preparing a positioning block, wherein the positioning block comprises a supporting platform for supporting the second side face and the fourth side face, a second supporting face and a fourth supporting face which are respectively attached to the second side face and the fourth side face are arranged on the supporting platform, a first bulge which is abutted to the first side face is arranged on one side of the second supporting face, a second bulge which is abutted to the third side face is arranged on one side of the fourth supporting face, and one side, close to the second workpiece, of the first bulge is abutted to a face to be welded of the second workpiece;
positioning a workpiece: the supporting platform of the positioning block is attached to the second side face and the fourth side face, the first protrusion positions the first side face and the to-be-welded face of the second workpiece, and the second protrusion positions the third side face, so that the first workpiece and the second workpiece are positioned;
spot welding: and performing at least three spot welding on the welding areas of the first workpiece and the second workpiece to finish the spot welding positioning of the first workpiece and the second workpiece.
Preferably, before the step of manufacturing the positioning tool, the step of measuring the first workpiece and the second workpiece is performed: measuring the vertical distance between the first side surface and the third side surface, marked as a, the thickness of the first workpiece and the second workpiece in the vertical direction, marked as b and c respectively, and the vertical distance between the second side surface and the fourth side surface, marked as d; and manufacturing the positioning block according to the measured data a, b, c and d.
Preferably, in the step of manufacturing the positioning tool, the width of the second protrusion and the width of the fourth supporting surface in the thickness direction of the second workpiece are marked as e, e is less than or equal to c, and the width of the first protrusion and the width of the second supporting surface in the thickness direction of the first workpiece are marked as f, f is less than or equal to b.
Preferably, in the step of manufacturing the positioning tool, a first supporting surface attached to the first side surface is arranged on one side, close to the second supporting surface, of the first protrusion, and a third supporting surface attached to the third side surface is arranged on one side, close to the fourth supporting surface, of the second protrusion.
Preferably, in the step of manufacturing the positioning tool, a positioning surface attached to the first protrusion is arranged on one side, close to the surface to be welded, of the second workpiece on the first protrusion.
Preferably, in the step of manufacturing the positioning fixture, the second side surface and the fourth side surface are flush, and the second supporting surface and the fourth supporting surface are located on the same plane.
Preferably, in the step of forming the welding gap, the spacer is made of a nickel foil material.
Preferably, in the step of forming the welding gap, the locating plate is of a disc-shaped structure, and the diameter of the locating plate is less than 0.3mm.
Preferably, in the spot welding step, two spot welding is performed on the first workpiece and the second workpiece, one spot welding is performed on one side of the first workpiece opposite to the second side surface and the fourth side surface, and the other spot welding is performed on the other side of the first workpiece opposite to the third side surface.
Preferably, after the spot welding step, the first and second workpieces are painted and loaded into a furnace for brazing.
Compared with the prior art, the invention achieves the following technical effects:
firstly, a second workpiece is placed on a surface to be welded of the first workpiece side by side and is attached according to the position relation when the second workpiece is connected with the first workpiece, positioning blocks matched with the structures of the first workpiece and the second workpiece after connection are manufactured according to the structures of the first workpiece and the second workpiece and the position relation of the first workpiece and the second workpiece, the corresponding side surfaces of the first workpiece and the second workpiece are abutted through supporting surfaces and protrusions on the positioning blocks, and then the first workpiece and the second workpiece are positioned, so that the first workpiece and the second workpiece are kept fixed in position, in the spot welding operation process, the position of the first workpiece and the position of the second workpiece cannot relatively move due to spot welding force application, the effectiveness of connection of the first workpiece and the second workpiece is guaranteed in the brazing process, further, due to the fact that the positioning blocks are specifically positioned according to the connection structure of the first workpiece and the second workpiece, the accuracy of positioning of the first workpiece and the second workpiece is guaranteed, and the positioning device is simple in structure, convenient to use, low in production, and can be used for large-scale spot welding positioning.
Secondly, before the step of manufacturing the positioning tool, the step of measuring the first workpiece and the second workpiece is carried out: measuring the vertical distance between the first side surface and the third side surface, marked as a, the thicknesses of the first workpiece and the second workpiece in the vertical direction, marked as b and c respectively, and the vertical distance between the second side surface and the fourth side surface, marked as d; and manufacturing positioning blocks according to the measured data a, b, c and d, and accurately measuring the corresponding structures of the first workpiece and the second workpiece to accurately process the positioning blocks according to the measured accurate data, so that the effectiveness of positioning the first workpiece and the second workpiece is ensured.
Thirdly, in the step of manufacturing the positioning tool, the width of the second protrusion and the fourth supporting surface in the thickness direction of the second workpiece is marked as e, e is less than or equal to c, the width of the first protrusion and the second supporting surface in the thickness direction of the first workpiece is marked as f, f is less than or equal to b, and the corresponding structures on the positioning blocks are narrowed, so that the positioning blocks are prevented from protruding out of the upper surface and the lower surface of the first workpiece or the second workpiece after the first workpiece and the second workpiece are placed and stacked to complete the combined positioning of the first workpiece and the second workpiece.
Fourthly, in the step of manufacturing the positioning tool, one side, close to the second supporting surface, of the first protrusion is provided with a first supporting surface attached to the first side surface, one side, close to the fourth supporting surface, of the second protrusion is provided with a third supporting surface attached to the third side surface, and by arranging the first supporting surface and the third supporting surface, the first protrusion and the second protrusion can effectively carry out surface-to-surface stable support on the first side surface and the second side surface, so that accurate positioning of the first workpiece and the second workpiece in the extending direction of the first workpiece and the second workpiece is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a side view of a first workpiece and a second workpiece in mating connection according to the present invention;
FIG. 2 is an elevational view of a first workpiece and a second workpiece in mating engagement in accordance with the invention;
FIG. 3 is a front, side and top view of a locating block of the present invention;
FIG. 4 is a schematic view of the mating connection of a first workpiece, a second workpiece, and a locating block in accordance with the present invention;
FIG. 5 is a schematic view of a spacer positioned between a first workpiece and a second workpiece in accordance with the present invention;
FIG. 6 is a schematic view of spot welding of a first workpiece and a second workpiece according to the present invention;
the welding method comprises the following steps of 1-first workpiece, 2-second workpiece, 3-welding gap, 4-fourth side face, 5-first side face, 6-third side face, 7-second side face, 8-fourth supporting face, 9-first supporting face, 10-positioning face, 11-third supporting face, 12-positioning block, 13-welding area, 14-positioning piece, 15-welding point, 16-first bulge, 17-second bulge, 18-second supporting face and 19-supporting platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a spot welding positioning method for vacuum brazing, which aims to solve the problems in the prior art, a corresponding positioning block is manufactured according to the matched size structure of two workpieces, and each bulge structure and the supporting surface structure on the positioning block can form effective close positioning on the workpieces, so that the relative displacement of the two workpieces in the spot welding process is avoided, and the whole positioning block has the advantages of simple structure, low cost and convenience in use.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 6, the present embodiment provides a spot welding positioning method for vacuum brazing, which includes the following steps:
a preparation stage: preparing two workpieces to be brazed, namely a first workpiece 1 and a second workpiece 2 with a structure larger than that of the first workpiece 1, placing the first workpiece 1 on a welding platform, arranging the surfaces to be brazed of the first workpiece 1 upwards, placing the second workpieces 2 on the surfaces to be brazed of the first workpiece 1 side by side, and attaching the second workpieces 2 to the first workpiece 1 according to the position relation when the second workpieces are connected with the first workpiece 1, wherein the first workpiece 1 comprises a first side surface 5 and a second side surface 7 which are connected, and the second workpiece 2 comprises a third side surface 6 and a fourth side surface 4 which are respectively positioned on the same side with the first side surface 5 and the second side surface 7;
forming the welding gap 3: placing a plurality of positioning pieces 14 between the surface to be welded of the first workpiece 1 and the surface to be welded of the second workpiece 2, wherein the thickness of each positioning piece 14 is the same as the required welding gap 3 between the two surfaces to be welded, and each positioning piece 14 is uniformly arranged at the edge of the welding area of the first workpiece 1 and the second workpiece 2;
manufacturing a positioning tool: preparing a positioning block 12, wherein the positioning block 12 comprises a supporting platform 19 for supporting the second side surface 7 and the fourth side surface 4, the supporting platform 19 is provided with a second supporting surface 18 and a fourth supporting surface 8 which are respectively attached to the second side surface 7 and the fourth side surface 4, one side of the second supporting surface 18 is provided with a first protrusion 16 which is abutted against the first side surface 5, one side of the fourth supporting surface 8 is provided with a second protrusion 17 which is abutted against the third side surface 6, and one side of the first protrusion 16, which is close to the second workpiece 2, is abutted against the surface to be welded of the second workpiece 2;
positioning a workpiece: attaching the supporting platform 19 of the positioning block 12 to the second side surface 7 and the fourth side surface 4, positioning the to-be-welded surfaces of the first side surface 5 and the second workpiece 2 by the first protrusion 16, and positioning the third side surface 6 by the second protrusion 17 to complete the positioning of the first workpiece 1 and the second workpiece 2;
spot welding: and performing at least three spot welding on the welding areas of the first workpiece 1 and the second workpiece 2 to finish the spot welding positioning of the first workpiece 1 and the second workpiece 2.
Firstly, the second workpiece 2 is placed on the surface to be welded of the first workpiece 1 side by side, and is attached according to the position relation when the second workpiece is connected with the first workpiece 1, and according to the structures of the first workpiece 1 and the second workpiece 2 and the position relation of the first workpiece 1 and the second workpiece 2, the positioning block 12 matched with the structures of the connected first workpiece 1 and the second workpiece 2 is manufactured, the supporting surface and the bulge on the positioning block 12 are used for completing the abutting of the corresponding side surfaces on the first workpiece 1 and the second workpiece 2, and further the positioning of the first workpiece 1 and the second workpiece 2 is completed, so that the first workpiece 1 and the second workpiece 2 are kept fixed in position, in the spot welding operation process, the spot welding force application cannot cause the relative movement of the positions of the first workpiece 1 and the second workpiece 2, the connecting effectiveness of the first workpiece 1 and the second workpiece 2 in the brazing process is ensured, further, as the positioning block 12 is used for carrying out the targeted positioning according to the connecting structure of the first workpiece 1 and the second workpiece 2, the positioning accuracy of the first workpiece 1 and the second workpiece 2 are ensured, the positioning device is simple and convenient to use, and low in cost.
Wherein, before the step of manufacturing the positioning tool, the step of measuring the first workpiece 1 and the second workpiece 2 is carried out: measuring the vertical distance of the first 5 and third 6 sides, denoted a, the thickness of the first 1 and second 2 workpieces in the vertical direction, denoted b and c, respectively, the vertical distance of the second 7 and fourth 4 sides, denoted d; the positioning block 12 is manufactured according to the measured data a, b, c and d, the corresponding structures of the first workpiece 1 and the second workpiece 2 are accurately measured, and then the positioning block 12 is accurately machined according to the measured accurate data, so that the effectiveness of positioning the first workpiece 1 and the second workpiece 2 is guaranteed.
Moreover, in the step of manufacturing the positioning tool, the widths of the second protrusion 17 and the fourth supporting surface 8 in the thickness direction of the second workpiece 2 are marked as e, e is less than or equal to c, the widths of the first protrusion 16 and the second supporting surface 18 in the thickness direction of the first workpiece 1 are marked as f, f is less than or equal to b, and by narrowing the corresponding structures on the positioning block 12, the positioning block 12 is prevented from protruding out of the upper and lower surfaces of the first workpiece 1 or the second workpiece 2 after the first workpiece 1 and the second workpiece 2 are placed and stacked, so that the combined positioning of the first workpiece 1 and the second workpiece 2 is not affected.
Preferably, in the step of manufacturing the positioning tool, the first supporting surface 9 attached to the first side surface 5 is arranged on one side of the first protrusion 16 close to the second supporting surface 18, the third supporting surface 11 attached to the third side surface 6 is arranged on one side of the second protrusion 17 close to the fourth supporting surface 8, and by arranging the first supporting surface 9 and the third supporting surface 11, the first protrusion 16 and the second protrusion 17 can effectively and stably support the first side surface 5 and the second side surface 7 in a surface-to-surface combination manner, so that the first workpiece 1 and the second workpiece 2 can be accurately positioned in the extending direction of the first workpiece 1 and the second workpiece 2 in a combined manner. The vertical distance between the first side 5 and the third side 6 is measured and marked g, and the first support surface 9 and the third support surface 11 are machined to be at the same distance according to the measured value g.
Furthermore, in the step of manufacturing the positioning tool, one side of the first protrusion 16, which is close to the surface to be welded of the second workpiece 2, is provided with a positioning surface 10 which is attached to the first protrusion, and the first protrusion 16 is stably supported in a surface-to-surface manner along the thickness direction of the second workpiece 2 by setting the positioning surface 10, so that the first workpiece 1 and the second workpiece 2 are accurately positioned in the thickness direction.
In the step of manufacturing the positioning tool, the second side surface 7 is flush with the fourth side surface 4, and the second supporting surface 18 and the fourth supporting surface 8 are located on the same plane, that is, the first workpiece 1 and the second workpiece 2 are kept flush at the positions of the second side surface 7 and the fourth side surface 4 and are attached to the plane where the second supporting surface 18 and the fourth supporting surface 8 are located together, so that the positioning in the direction can be completed, and further, the first supporting surface 9 and the third supporting surface 11 are only required to be attached to the first side surface 5 and the third side surface 6.
In addition, in the step of forming the welding gap 3, the positioning sheet 14 is made of a nickel foil material and is used for brazing nickel-based high-temperature alloy by using a nickel-based solder, the nickel foil material has good mechanical property, machining property and welding property, a method of filling the positioning sheet 14 can be adopted when the gap is controlled by spot welding, and the positioning sheet 14 with the thickness being the same as that of the required gap of the welding seam is filled in the welding seam in advance, so that stable support for the welding seam is formed, and firm welding connection between the first workpiece 1 and the second workpiece 2 can be guaranteed in the subsequent brazing process. Preferably, the four corners of the welding seam area are filled with the positioning sheets 14 made of nickel foil materials, so that the influence of brazing on the welding seam area 13 is fully reduced, and the welding seam size is uniform and fixed during spot welding, coating and brazing. In addition, the other alloys can be filled with the original foil strip material with the similar component to the solder during the brazing.
Preferably, in the step of forming the welding gap 3, the positioning piece 14 is of a disc-shaped structure so as to form stable gap support for the first workpiece 1 and the second workpiece 2, and the diameter of the positioning piece 14 is less than 0.3mm so as to prevent the filling amount from influencing the structure and the performance of the welding seam.
Further, in the spot welding step, two spot welding is firstly carried out on the first workpiece 1 and the second workpiece 2 to form a welding spot 15, wherein one spot welding is located on one side opposite to the second side surface 7 and the fourth side surface 4, and the other spot welding is located on one side opposite to the first side surface 5 and the third side surface 6, after the two spot welding is completed, the positioning tool is detached, and the third spot welding is carried out on one side close to the second side surface 7 and the fourth side surface 4 or one side close to the first side surface 5 and the third side surface 6, so that the effectiveness of the spot welding can be ensured, the influence of the positioning block 12 is avoided, and the spot welding overlapping is carried out in at least three directions of the welding area 13 of the first workpiece 1 and the second workpiece 2, and the first workpiece 1 and the second workpiece 2 can be assembled and fixed according to required positions.
Further, after the spot welding step, the first workpiece 1 and the second workpiece 2 are coated and loaded in a furnace for brazing, and the brazing work of the first workpiece 1 and the second workpiece 2 is completed according to the brazing operation schedule.
And the adaptation according to the actual needs is within the protection scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A spot welding positioning method for vacuum brazing is characterized by comprising the following steps:
a preparation stage: preparing two workpieces to be brazed, namely a first workpiece and a second workpiece with a structure larger than that of the first workpiece, placing the first workpiece on a welding platform, arranging the surfaces to be welded of the first workpiece upwards, placing the second workpiece on the surfaces to be welded of the first workpiece side by side, and attaching the second workpiece to the first workpiece according to the position relation when the second workpiece is connected with the first workpiece, wherein the first workpiece comprises a first side surface and a second side surface which are connected, and the second workpiece comprises a third side surface and a fourth side surface which are positioned on the same side with the first side surface and the second side surface respectively;
forming a welding gap: placing a plurality of positioning pieces between a surface to be welded of a first workpiece and a surface to be welded of a second workpiece, wherein the thickness of each positioning piece is the same as the required welding gap between the two surfaces to be welded, and each positioning piece is uniformly arranged at the edge position of a welding area of the first workpiece and the second workpiece;
manufacturing a positioning tool: preparing a positioning block, wherein the positioning block comprises a supporting platform for supporting the second side face and the fourth side face, a second supporting face and a fourth supporting face which are respectively attached to the second side face and the fourth side face are arranged on the supporting platform, a first bulge which is abutted to the first side face is arranged on one side of the second supporting face, a second bulge which is abutted to the third side face is arranged on one side of the fourth supporting face, and one side, close to the second workpiece, of the first bulge is abutted to a face to be welded of the second workpiece;
positioning a workpiece: the supporting platform of the positioning block is attached to the second side face and the fourth side face, the first protrusion positions the first side face and the face to be welded of the second workpiece, and the second protrusion positions the third side face, so that the first workpiece and the second workpiece are positioned;
spot welding: and performing at least three spot welding on the welding areas of the first workpiece and the second workpiece to finish the spot welding positioning of the first workpiece and the second workpiece.
2. The spot welding positioning method for vacuum brazing according to claim 1, wherein before the positioning tool manufacturing step, a measuring step of the first workpiece and the second workpiece is performed: measuring the vertical distance between the first side surface and the third side surface, marked as a, the thickness of the first workpiece and the second workpiece in the vertical direction, marked as b and c respectively, and the vertical distance between the second side surface and the fourth side surface, marked as d; and manufacturing the positioning block according to the measured data a, b, c and d.
3. The spot welding positioning method for vacuum brazing according to claim 2, wherein in the step of manufacturing the positioning tool, the width of the second protrusion and the fourth supporting surface in the thickness direction of the second workpiece is marked as e, e ≦ c, and the width of the first protrusion and the second supporting surface in the thickness direction of the first workpiece is marked as f, f ≦ b.
4. The spot welding positioning method for vacuum brazing according to claim 2 or 3, wherein in the step of manufacturing the positioning tool, a first supporting surface attached to the first side surface is arranged on one side, close to the second supporting surface, of the first protrusion, and a third supporting surface attached to the third side surface is arranged on one side, close to the fourth supporting surface, of the second protrusion.
5. The spot welding positioning method for vacuum brazing according to claim 4, wherein in the step of manufacturing the positioning tool, a positioning surface attached to one side of the first protrusion, which is close to the surface to be welded of the second workpiece, is arranged on one side of the first protrusion.
6. The spot welding positioning method for vacuum brazing according to claim 5, wherein in the step of manufacturing the positioning tool, the second side surface and the fourth side surface are flush, and the second supporting surface and the fourth supporting surface are located on the same plane.
7. The spot welding positioning method for vacuum brazing according to claim 6, wherein the spacer is made of a nickel foil material in the step of forming the weld gap.
8. A spot welding positioning method of vacuum brazing according to claim 7, wherein in the step of forming a weld gap, said spacer is a disk-like structure, and a diameter of said spacer is less than 0.3mm.
9. The spot welding positioning method of vacuum brazing according to claim 8, wherein in the spot welding step, two spot welding are performed on the first workpiece and the second workpiece, one spot welding being performed on a side opposite to the second side surface and the fourth side surface and the other spot welding being performed on a side opposite to the first side surface and the third side surface, and after the two spot welding are completed, the positioning tool is detached, and a third spot welding is performed on a side close to the second side surface and the fourth side surface or a side close to the first side surface and the third side surface.
10. A spot welding positioning method of vacuum brazing according to claim 9, wherein said first and second workpieces are painted and charged for brazing after the spot welding step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996388.XA CN115178827A (en) | 2022-08-19 | 2022-08-19 | Spot welding positioning method for vacuum brazing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210996388.XA CN115178827A (en) | 2022-08-19 | 2022-08-19 | Spot welding positioning method for vacuum brazing |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208409010U (en) * | 2018-06-01 | 2019-01-22 | 厦门市文忠不锈钢制品有限公司 | A kind of cutting machine grinding wheel Water tank shortwall welding fixture |
| CN110369927A (en) * | 2019-05-22 | 2019-10-25 | 东方通信股份有限公司 | A kind of welding tooling of spliced panel |
| CN113441802A (en) * | 2021-07-19 | 2021-09-28 | 飞荣达科技(江苏)有限公司 | Liquid cooling plate joint brazing method |
| CN114833412A (en) * | 2021-02-02 | 2022-08-02 | 中国航发商用航空发动机有限责任公司 | Brazing method of DD6 single crystal and GH3536 alloy |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208409010U (en) * | 2018-06-01 | 2019-01-22 | 厦门市文忠不锈钢制品有限公司 | A kind of cutting machine grinding wheel Water tank shortwall welding fixture |
| CN110369927A (en) * | 2019-05-22 | 2019-10-25 | 东方通信股份有限公司 | A kind of welding tooling of spliced panel |
| CN114833412A (en) * | 2021-02-02 | 2022-08-02 | 中国航发商用航空发动机有限责任公司 | Brazing method of DD6 single crystal and GH3536 alloy |
| CN113441802A (en) * | 2021-07-19 | 2021-09-28 | 飞荣达科技(江苏)有限公司 | Liquid cooling plate joint brazing method |
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| 于治水等: "钎缝间隙对316L不锈钢真空钎焊接头组织的影响", 材料工程, no. 10, pages 77 - 81 * |
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