A heat flow sensor welding device

Abstract

The application discloses a heat flow sensor welding device, which comprises a bottom plate, a front element welding base and a back element welding base arranged on the bottom plate; the upper surface of the front element welding base is provided with a U-shaped groove and a front element pressing assembly; the U-shaped groove is provided with a U-shaped groove through hole, and the front element pressing assembly is provided with a plug-in part which can be inserted into the U-shaped groove through hole; the back element welding base comprises a bracket, an electromagnet and a back element pressing assembly; the back element pressing assembly is magnetically attached to the electromagnet after the electromagnet is electrified. The application can realize positioning and pressing of the front thermocouple wire, the sheet and the back thermocouple wire during welding of the heat flow sensor, and can ensure consistency, symmetry and reliability of the sheet and the thermocouple wire welded on the heat flow sensor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tooling fixture, in particular to a heat flow sensor welding device. BACKGROUND

[0002] Differential scanning calorimetry is a technique for measuring the heat flow or heating power supplied to the sample and reference as a function of temperature or time under programmed temperature and atmosphere, and the instrument for measuring is called differential scanning calorimeter (DSC).

[0003] The heat flow sensor is the core component for temperature control and measurement in the heat flow type differential scanning calorimeter. As shown in Figs. Figure 1 and Figure 2 The base 101 of the heat flow sensor is a waist-round shape, and a center through hole 102 is arranged in the middle of the base 101. The upper and lower ends of the circular through hole 102 are respectively fixed with a front thermocouple wire 105. Two cylindrical pedestals 103 for placing the sample and reference are symmetrically arranged on the left and right sides of the base 101. The lower end surface of each cylindrical pedestal 103 is provided with an inward recess 104, and a thin sheet is welded to the bottom surface of the recess 104 to make the sample and reference be heated uniformly when heated. The lower end of each thin sheet is welded with a back thermocouple wire 106. Among the four thermocouple wires, one front thermocouple wire and two back thermocouple wires are made of the same material, and the other front thermocouple wire is made of another material, so that three groups of thermocouples can be established by combining the three thermocouple wires made of the same material and the thermocouple wire made of the other material, respectively, for measuring the temperatures of the sample, the reference and the furnace body.

[0004] Since the thermocouple wires and the thin sheet of the heat flow sensor have symmetry, the quality of welding directly determines the quality of the heat flow sensor. At the same time, since the principle of thermocouple is the Seebeck effect, the materials are different during welding, which increases the difficulty of laser welding. The heat flow sensor has a small volume, but has a high requirement for the welding position, so that the position of each welding is consistent and positioning is required. Since laser welding is a non-contact welding machine, the welding position needs to be designed with a clamp for clamping to ensure reliable welding. Therefore, a heat flow sensor welding device is needed to ensure the consistency, symmetry and reliability of the welding of the thin sheet and the thermocouple wire on the heat flow sensor. SUMMARY

[0005] The present application provides a heat flow sensor welding device to solve the above technical problems.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0007] The application discloses a heat flow sensor welding device, which comprises a heat flow sensor clamping fixing mechanism, a laser welding machine and a control mechanism, wherein the laser welding machine is used for welding the heat flow sensor fixed on the heat flow sensor clamping fixing mechanism under the control of the control mechanism; the heat flow sensor clamping fixing mechanism comprises a bottom plate and front element welding bases and back element welding bases arranged on the bottom plate; an upper surface of the front element welding base is provided with a U-shaped groove and a front element pressing assembly used for pressing the heat flow sensor base into the U-shaped groove; the U-shaped groove is provided with a U-shaped groove through hole matched with a center through hole of the heat flow sensor; the front element pressing assembly is provided with an inserting part which can be inserted into the U-shaped groove through hole; the back element welding base comprises a support, an electromagnet arranged below the support and a back element pressing assembly arranged above the support and used for pressing the turned-over heat flow sensor base onto the support; the back element pressing assembly is made of paramagnetic material; and the back element pressing assembly is magnetically attached to the electromagnet after the electromagnet is electrified.

[0008] As preferred, the front element pressing assembly comprises two symmetrically arranged guide rods, two base pressing tables and an elastic pressing table used for pressing the heat flow sensor base, the two guide rods are symmetrically arranged on the upper surface of the front element welding base on both sides of the U-shaped groove, the two base pressing tables are arranged on the upper surface of the front element welding base on both sides of the U-shaped groove, the side edges of the two base pressing tables are used for abutting against the cylindrical base of the heat flow sensor, the bottom surfaces of the two base pressing tables are provided with front filament positioning structures, the elastic pressing table is provided with a rotating end, a clamping end and an elastic sheet connecting the two ends, the rotating end of the elastic pressing table can rotate around one of the guide rods, the clamping end of the elastic pressing table is clamped on the other guide rod, and the elastic sheet presses the base pressing table into the U-shaped groove, and the elastic pressing table is provided with two first welding through holes.

[0009] As preferred, the base pressing table has a convex structure formed by an inner end surface, two inwardly recessed arc surfaces, two side end surfaces and an outer end surface, the outer end surface is longer than the inner end surface, the inner end surface is provided with a semicircular groove, the arc surfaces are matched with the cylindrical base of the heat flow sensor, the base pressing table is provided with a second welding through hole corresponding to the first welding through hole, the bottom surface of the base pressing table is provided with a front filament accommodating groove communicated with the second welding through hole, the bottom of the inner end surface extends an inserting part, the inserting part is provided with a front filament movable hole communicated with the filament accommodating groove, and the two semicircular grooves form a circular hole matched with the center through hole of the heat flow sensor after the inner end surfaces of the two base pressing tables are combined.

[0010] As preferred, the U-shaped groove is provided with a waist circular groove matched with the heat flow sensor base, and the U-shaped groove through hole is located at the center of the waist circular groove.

[0011] As preferred, the bracket comprises a bracket top plate arranged above the electromagnet and bracket side plates arranged on both sides of the electromagnet, the bracket top plate is provided with a center circular groove and two base grooves symmetrically arranged on both sides of the center circular groove, the center circular groove is consistent with the aperture of the center circular hole of the heat flow sensor, and the base grooves are used for placing the cylindrical base of the heat flow sensor.

[0012] As preferred, the back element pressing assembly comprises two sheet pressing tables corresponding to the base grooves and a sheet pressing table positioning piece clamped between the two sheet pressing tables, the sheet pressing table comprises a ring-shaped column body, the outer periphery of the lower end of the ring-shaped column body is uniformly provided with a plurality of long strip-shaped tapered protrusions, and connecting grooves are formed between adjacent tapered protrusions, the sheet pressing table positioning piece comprises a connecting block, a positioning rod penetratingly fixed at the center of the connecting block and positioning blocks fixed on both sides of the connecting block, the positioning blocks are matched with the connecting grooves, and the positioning rod is matched with the center circular groove.

[0013] As preferred, the positioning blocks are provided with third welding through holes used for laser welding of the sheets.

[0014] As preferred, the back element pressing assembly comprises two back double-wire pressing tables corresponding to the base grooves, the back double-wire pressing table is annular, the upper end surface of the back double-wire pressing table is provided with a back double-wire through hole penetrating through the lower end surface, and the bottom of the back double-wire pressing table is provided with a back double-wire accommodating groove.

[0015] Compared with the prior art, the heat flow sensor welding device can realize positioning and pressing of the front thermocouple wire, the sheet and the back thermocouple wire during welding of the heat flow sensor, and ensures consistency, symmetry and reliability of the sheet and the thermocouple wire welded on the heat flow sensor. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat flow sensor;

[0017] Figure 2 It is a schematic diagram of the top view structure of the heat flow sensor;

[0018] Figure 3 It is a schematic diagram of the structure of the heat flow sensor welding device according to the application;

[0019] Figure 4 It is a schematic diagram of the structure of the front element welding base in the heat flow sensor welding device according to the application;

[0020] Figure 5 It is a schematic diagram of the structure of the elastic pressing table in the heat flow sensor welding device according to the application;

[0021] Figure 6 It is a schematic diagram of the structure of the base pressing table in the heat flow sensor welding device according to the application;

[0022] Figure 7 Figure 2 is a structural schematic diagram of another perspective view of a substrate pressing table in a heat flow sensor welding device according to the present application;

[0023] Figure 8 Figure 3 is a structural schematic diagram of a support in a heat flow sensor welding device according to the present application;

[0024] Figure 9 Figure 4 is a structural schematic diagram of a thin sheet pressing table in a heat flow sensor welding device according to the present application;

[0025] Figure 10 Figure 5 is a structural schematic diagram of a thin sheet pressing table positioning member in a heat flow sensor welding device according to the present application;

[0026] Figure 11 Figure 6 is a structural schematic diagram of another embodiment of a heat flow sensor welding device according to the present application;

[0027] Figure 12 Figure 7 is a structural schematic diagram of a back surface wire pair pressing table in a heat flow sensor welding device according to the present application.

[0028] In the figure, 1 is a bottom plate, 2 is a front element welding base table, 3 is a back element welding base table, 21 is a U-shaped groove, 22 is a front element pressing assembly, 23 is a guide rod hole, 31 is a support, 32 is an electromagnet, 33 is a thin sheet pressing table, 34 is a thin sheet pressing table positioning member, 35 is a back surface wire pair pressing table, 11 is a fixing hole, 100 is a heat flow sensor, 101 is a substrate, 102 is a center through hole, 103 is a cylindrical base, 104 is a groove, 105 is a front surface thermocouple wire, 106 is a back surface thermocouple wire, 110 is a heat flow sensor clamping and fixing mechanism, 120 is a laser welding machine, 130 is a control mechanism, 221 is a guide rod, 222 is a substrate pressing table, 223 is an elastic pressing table, 311 is a support top plate, 312 is a support side plate, 331 is a ring-shaped column, 332 is a conical protrusion, 333 is a connecting groove, 341 is a connecting block, 342 is a positioning rod, 343 is a positioning block, 351 is a back surface wire pair perforation, 352 is a back surface wire pair accommodating groove, 2221 is an inner end surface, 2222 is an arc surface, 2223 is a side end surface, 2224 is an outer end surface, 2225 is a semicircular groove, 2226 is a second welding through hole, 2227 is a front surface wire pair accommodating groove, 2228 is an insertion part, 2229 is a front surface wire pair movable hole, 2231 is a first welding through hole, 2232 is a rotating end, 2233 is a clamping end, 2234 is an elastic sheet, 3111 is a center circular groove, 3112 is a base groove, 344 is a third welding through hole. DETAILED DESCRIPTION

[0029] The application will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments do not limit the application, and the changes in structure, method or function made by those skilled in the art based on these embodiments are included in the protection scope of the application.

[0030] The terms used in the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0031] The present application is used for Figure 1 and Figure 2 The fixing device for welding the heat flow sensor 100. The base 101 of the heat flow sensor 100 is waist-round, and a central through hole 102 is arranged in the middle of the base 101. The upper and lower ends of the circular through hole 102 are respectively fixed with front thermocouple wires 105, which are in a bent shape. The upper segment of the front thermocouple wires 105 is welded to the surface of the base 100 on both sides of the central through hole 102, and the lower segment of the front thermocouple wires 105 passes through the central through hole 102. Two cylindrical pedestals 103 for placing samples and references are symmetrically arranged on the left and right sides of the base 101. The lower end surface of each cylindrical pedestal 103 is provided with an inward recess 104, and a thin sheet is welded to the bottom surface of the recess 104 to make the samples and references evenly heated when heated. The lower end of each thin sheet is welded with a back thermocouple wire 106.

[0032] As shown in Figure 3 A heat flow sensor welding device, which comprises a heat flow sensor clamping and fixing mechanism 110, a laser welding machine 120 and a control mechanism 130. The laser welding machine 120 performs welding on the heat flow sensor 100 fixed on the heat flow sensor clamping and fixing mechanism 110 under the control of the control mechanism 130. The heat flow sensor clamping and fixing mechanism 110 comprises a bottom plate 1 and front element welding base 2 and back element welding base 3 arranged on the bottom plate 1. The bottom plate 1 is provided with a plurality of fixing holes 11, which can be fixedly installed on a workbench through the fixing holes 11. The laser welding machine 120 performs welding operation on the thin sheet, front thermocouple wires 105 and back thermocouple wires 106 of the heat flow sensor 100 by a non-contact laser welding method. The control mechanism 130 can be an industrial computer or any device capable of executing a laser welding operation program, which controls the welding position and welding strength of the laser welding machine 120.

[0033] As shown in Figure 3 and Figure 4As shown in the figure, the upper surface of the front element welding base 2 is provided with a U-shaped groove 21 and a front element pressing assembly 22 for pressing the heat flow sensor base 101 into the U-shaped groove 21, the U-shaped groove 21 is provided with a U-shaped through hole 211 matched with the heat flow sensor center through hole 102, and the front element pressing assembly is provided with a plug-in part that can be inserted into the U-shaped through hole 211; wherein the bottom of the U-shaped groove 21 can be provided with a waist round groove 212 matched with the heat flow sensor base 100, and the U-shaped through hole 211 is located at the center of the waist round groove 212. The front element pressing assembly 22 includes two symmetrically arranged guide rods 221, two base pressing tables 222 and elastic pressing tables 223 for pressing the heat flow sensor base 101, the two guide rods 221 are symmetrically arranged on the upper surface of the front element welding base 2 on both sides of the U-shaped groove 21 through guide rod holes 23, the side edges of the two base pressing tables 222 are used to abut and link with the heat flow sensor cylindrical base 103, and the bottom surfaces of the two base pressing tables 222 are each provided with a front double-filament positioning structure.

[0034] As shown in the figure, Figure 5 The elastic pressing table 223 is provided with a rotating end 2232, a clamping end 2233 and an elastic sheet 2234 connecting the two ends, the rotating end 2232 of the elastic pressing table 223 can rotate around one of the guide rods 221, the clamping end 2233 of the elastic pressing table 223 is clamped on the other guide rod 222, and the elastic sheet 2234 presses the base pressing table 222 into the U-shaped groove 21, and the elastic pressing table 223 is provided with two first welding through holes 2231.

[0035] As shown in the figure, Figure 6 And Figure 7 As shown in the figure, the base pressing table 222 has a convex letter shape structure formed by an inner end face 2221, two inwardly recessed arc faces 2222, two side end faces 2223 and an outer end face 2224, the outer end face 2224 is longer than the inner end face 2221, the inner end face 2221 is provided with a semicircular groove 2225, the arc faces 2222 are matched with the outer shape of the heat flow sensor cylindrical base 103, the upper surface of the base pressing table 222 is provided with a second welding through hole 2226 penetrating through the lower surface and corresponding to the first welding through hole 2231, the bottom surface of the base pressing table 222 is provided with a front double-filament accommodating groove 2227 communicating with the second welding through hole 2226, the bottom of the inner end face 2221 extends a plug-in part 2228, the plug-in part 2228 is provided with a front double-filament movable hole 2229 communicating with the double-filament accommodating groove 2227, and the two inner end faces 2221 are spliced to form a circular hole matched with the heat flow sensor center through hole 102 after the two semicircular grooves 2225, and the two outer end faces 2224 are respectively used to tightly fit the two side walls of the U-shaped groove 21.

[0036] The front element welding base 2 is used to complete the welding of the two front thermocouple wires 105 on the heat flow sensor 100. During the welding operation, the base 100 of the heat flow sensor 100 is placed in the waist round groove 212 at the bottom of the U-shaped groove 21, and then the two front thermocouple wires 105 are placed on the base 100, and the lower ends of the front thermocouple wires 105 pass through the center through hole 102; the two base pressing tables 222 are spliced and clamped above the base 100 between the two cylindrical bases 103, the insertion part 2228 passes through the center through hole 102 and is inserted into the U-shaped groove through hole 211, and the upper ends of the two front thermocouple wires 105 are respectively limited on the upper and lower sides of the center through hole 102 through the thermocouple accommodating groove 2227; the rotating end 2232 of the elastic pressing table 223 rotates around one of the guide rods 221, the clamping end 2233 of the elastic pressing table 223 is clamped on the other guide rod 222, and the elastic sheet 2234 presses the base pressing table 222 in the U-shaped groove 21 and aligns the second welding through hole 2226 with the first welding through hole 2231; the laser welding machine 120 is started, and the upper ends of the two front thermocouple wires 105 are respectively welded on the upper and lower sides of the center through hole 102 through the second welding through hole 2226.

[0037] As shown in Figure 3 , the back element welding base 3 includes a support 31, an electromagnet 32 arranged below the support 31, and a back element pressing assembly arranged above the support 31 for pressing the overturned heat flow sensor base 101 on the support 31, the back element pressing assembly is paramagnetic material, and the electromagnet 32 is magnetically attached to the back element pressing assembly after being powered on.

[0038] As shown in Figure 8 , the support 31 includes a support top plate 311 arranged above the electromagnet 32 and support side plates 312 arranged on both sides of the electromagnet 32, the support top plate 311 is provided with a center circular groove 3111 and two base grooves 3112 symmetrically distributed on both sides of the center circular groove 3111, the center circular groove 3111 is consistent with the hole diameter of the center circular hole 102 of the heat flow sensor 100, and the base grooves 3112 are used to place the cylindrical bases 103 of the heat flow sensor 100. The support top plate 311 and the support side plates 312 are detachably connected or integrally formed.

[0039] In an embodiment of the present application, the back element pressing assembly includes two thin plate pressing tables 33 corresponding to the base grooves 3112 and a thin plate pressing table positioning member 34 clamped between the two thin plate pressing tables 33. As shown in Figure 9 , the thin plate pressing table 33 includes a ring-shaped column 331, and the lower end of the ring-shaped column 331 is uniformly distributed with a plurality of long strip-shaped tapered protrusions 332, and connecting grooves 333 are formed between adjacent tapered protrusions 332. As shown in Figure 10As shown, the wafer pressing platform positioning member 34 comprises a connecting block 341, a positioning rod 342 fixed through the center of the connecting block 341, and positioning blocks 343 fixed on both sides of the connecting block 341, the positioning blocks 343 are matched with the connecting grooves 333, and the positioning rod 343 is matched with the center circular groove 3111. The positioning blocks 343 can be provided with third welding through holes 344 for laser welding of the wafer. If the heat flow sensor 100 has been welded with the front hot spot double wires 105, the center gap of the annular cylinder 331 can be used for the front hot spot double wires 105 to pass through.

[0040] At this time, the back element welding base 3 is used to complete the welding of the two wafers on the heat flow sensor 100. During the welding operation, the bottom surface of the substrate 101 of the heat flow sensor 100 is placed upward on the support top plate 311, and the cylindrical base 103 is placed in the base groove 3112; two wafers are placed in two grooves 104 of the heat flow sensor 100, and then two wafer pressing platforms 33 are placed in the grooves 104, the tapered protrusions 332 of the wafer pressing platforms 33 abut against the inner walls of the grooves 104; the wafer pressing platform positioning member 34 is clamped between the two wafer pressing platforms 33, the positioning blocks 343 of the wafer pressing platform positioning member 34 are clamped in the connecting grooves 333 of the wafer pressing platforms 33, and the positioning rod 342 of the wafer pressing platform positioning member 34 is inserted into the center circular groove 3111 of the support top plate 311 through the center circular hole 102 of the heat flow sensor 100; the electromagnet 32 is started, the wafer pressing platform 33 and the wafer pressing platform positioning member 34 are made of paramagnetic material, and after being attracted by the electromagnet 32, a downward pressure is generated, so that the wafers are pressed tightly; the laser welding machine 120 is started, and through the third welding through holes 344 on the connecting grooves 333 and the positioning blocks 343, the two wafers are welded to the bottoms of the two grooves 104 respectively; after the welding is completed, the electromagnet 32 is powered off.

[0041] Another embodiment of the present application is as follows, Figure 11 As shown, the back element pressing assembly comprises two back double wire pressing platforms 35 corresponding to the base grooves 3112. As shown, Figure 12 As shown, the back double wire pressing platform 35 is annular, the upper end surface of the back double wire pressing platform 35 is provided with a back double wire through hole 351 penetrating through the lower end surface, and the bottom of the back double wire pressing platform 35 is provided with a back double wire accommodating groove 352.

[0042] At this time, the back element welding base 3 is used to complete the welding between the two back hot spot filaments 106 and the sheet on the heat flow sensor 100. During the welding operation, the bottom surface of the base 101 of the heat flow sensor 100 is placed on the support top plate 311 with the cylindrical base 103 placed in the base groove 3112, and the two grooves 104 of the heat flow sensor 100 have respectively welded sheets; the two back hot spot filaments 106 are placed on the sheets in the grooves 104; the back filament pressing table 35 is pressed into the groove 104, the outer wall of the back filament pressing table 35 abuts against the inner wall of the groove 104, the back filament hole 351 is used for the vertical part of the back hot spot filament 106 to be connected, and the back filament accommodating groove 352 at the bottom of the back filament pressing table 35 limits the part of the back hot spot filament 106 to be welded on the sheet; the electromagnet 32 is started, the back filament pressing table 35 is made of paramagnetic material, and after being attracted by the electromagnet 32, a downward pressure is generated, so as to press the sheet and the back hot spot filament 106 tightly; the laser welding machine 120 is started, and through the central gap of the annular back filament pressing table 35, the two back hot spot filaments 106 are respectively welded to the two sheets; after the welding is completed, the electromagnet 32 is powered off.

[0043] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0044] It is to be understood that the application is not limited to the precise construction here described and as shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be limited only by the appended claims.

Claims

1. A welding apparatus for a heat flux sensor, characterized in that, The device includes a heat flux sensor clamping and fixing mechanism, a laser welding machine, and a control mechanism. The laser welding machine, under the control of the control mechanism, welds the heat flux sensor fixed to the heat flux sensor clamping and fixing mechanism. The heat flux sensor clamping and fixing mechanism includes a base plate and a front element welding base and a back element welding base disposed on the base plate. The upper surface of the front element welding base is provided with a U-shaped groove and a front element clamping assembly for pressing and confining the heat flux sensor substrate within the U-shaped groove. The U-shaped groove has a U-groove through hole that matches the central through hole of the heat flux sensor. The front element clamping assembly has a plug-in portion that can be inserted into the U-groove through hole. The back element welding base includes a bracket, an electromagnet disposed below the bracket, and a back element clamping assembly disposed above the bracket for pressing the flipped heat flux sensor substrate onto the bracket. The back element clamping assembly is made of a paramagnetic material, and when the electromagnet is energized, the back element clamping assembly is magnetically attracted to the electromagnet. The front element clamping assembly includes two symmetrically arranged guide rods, two symmetrically arranged base clamping platforms and elastic clamping platforms for clamping the heat flow sensor base. The two guide rods are symmetrically arranged on the upper surface of the front element welding base on both sides of the U-shaped groove. The sides of the two base clamping platforms are used to abut against the cylindrical base of the heat flow sensor. The bottom surface of both base clamping platforms is provided with a front coupler positioning structure. The elastic clamping platform is provided with a rotating end, a snap-fit ​​end, and an elastic sheet connecting the two ends. The rotating end of the elastic clamping platform can rotate around one of the guide rods. When the snap-fit ​​end of the elastic clamping platform is snapped onto the other guide rod, the elastic sheet presses the base clamping platform into the U-shaped groove. The elastic clamping platform is provided with two first welding through holes. The base plate is a convex structure formed by an inner end face, two inwardly concave arc-shaped surfaces, two side end faces, and an outer end face. The outer end face is longer than the inner end face. The inner end face has a semi-circular groove. The arc-shaped surface matches the cylindrical base of the heat flow sensor. The base plate has a second welding through hole that corresponds to and communicates with the first welding through hole. The bottom surface of the base plate has a front-side ferrule receiving groove that communicates with the second welding through hole. The bottom of the inner end face extends into a plug-in part. The plug-in part has a front-side ferrule movable hole that communicates with the ferrule receiving groove. After the inner end faces of the two base plates are joined together, the two semi-circular grooves form a circular hole that matches the central through hole of the heat flow sensor.

2. The heat flux sensor welding apparatus according to claim 1, characterized in that, The bottom of the U-shaped groove is provided with an oval groove that is adapted to the heat flow sensor substrate, and the through hole of the U-shaped groove is located at the center of the oval groove.

3. The heat flow sensor welding apparatus according to claim 1, characterized in that, The bracket includes a bracket top plate located above the electromagnet and bracket side plates located on both sides of the electromagnet. The bracket top plate has a central circular groove and two base grooves symmetrically distributed on both sides of the central circular groove. The central circular groove has the same diameter as the central circular hole of the heat flow sensor. The base grooves are used to place the cylindrical base of the heat flow sensor.

4. The heat flow sensor welding apparatus according to claim 3, characterized in that, The back element clamping assembly includes two thin sheet pressing platforms corresponding to the base groove and a thin sheet pressing platform positioning component snapped between the two thin sheet pressing platforms. The thin sheet pressing platform includes an annular column, and several elongated conical protrusions are evenly distributed on the outer periphery of the lower end of the annular column. A connecting groove is formed between adjacent conical protrusions. The thin sheet pressing platform positioning component includes a connecting block, a positioning rod that passes through and is fixed to the center of the connecting block, and positioning blocks that are fixed to both sides of the connecting block. The positioning blocks are adapted to the connecting groove, and the positioning rod is adapted to the central circular groove.

5. The heat flux sensor welding apparatus according to claim 4, characterized in that, The positioning block is provided with a third welding through hole for laser welding of thin sheets.

6. The heat flux sensor welding apparatus according to claim 3, characterized in that, The back element pressing assembly includes two back wire pressing platforms corresponding to the base groove. The back wire pressing platform is annular, and the upper surface of the back wire pressing platform is provided with a back wire through hole that passes through the lower surface. The bottom of the back wire pressing platform is provided with a back wire receiving groove.

7. The heat flux sensor welding apparatus according to claim 1, characterized in that, The base plate has several fixing holes.

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