A vehicle-mounted vacuum insulation box brazing device and method

Abstract

The present invention belongs to the field of vacuum brazing technology, and particularly relates to a vehicle-mounted vacuum insulation box brazing device and method. The device includes a glass-based brazing flux column, a vacuum brazing sealing box, a robot, and an end effector arranged at the end of the robot. The vehicle-mounted vacuum insulation box includes a lower box and an upper cover. The lower box is placed in the vacuum brazing sealing box and evacuated. The side wall of the lower box has a hollow cavity. The top of the four corners of the lower box is provided with a brazing groove connected to the hollow cavity, and a glass-based brazing flux column is inserted in each brazing groove; the top of the vacuum brazing sealing box is provided with a high-temperature resistant perspective window; the end effector includes a camera and a laser head, and the camera and the laser head respectively collect position information and braze and melt the glass-based brazing flux column through the high-temperature resistant perspective window. The present invention adopts the method of heating the local position of the brazing workpiece by laser on the outside of the vacuum box, which is energy-saving and environmentally friendly, reduces costs, and improves work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum brazing, and in particular relates to a vehicle-mounted vacuum insulation box brazing device and method. Background Art

[0002] The vehicle-mounted thermal insulation box can keep both heat and cold, so it is widely used. At present, the materials of the vehicle-mounted thermal insulation box are mainly vacuum insulation panels (VIP panels), EPS (polystyrene foam), PU (polyurethane foam) and EPP (expanded polypropylene). However, the existing materials are thick and have a small load-bearing capacity. If the existing vehicle-mounted vacuum insulation cup production system is used to make a vacuum insulation box, the following technical difficulties need to be overcome. The volume of the vehicle-mounted vacuum insulation box is larger than that of the vacuum insulation cup. Under the condition of constant atmospheric pressure, there is a certain relationship between pressure and surface area. The vehicle-mounted vacuum insulation box needs to overcome the problem of atmospheric pressure collapse due to its large surface area. The vacuum insulation cup is vacuum-manufactured using a traditional large-scale vacuum brazing furnace and requires overall heating. The vacuum insulation cup has a cylindrical outer surface and its structure is self-stable. It is heated as a whole at 500 to 700°C, and the glass-based brazing flux is liquefied, thereby blocking the vacuum hole. In addition, the large-scale vacuum brazing furnace has slow overall heat dissipation and requires a complex and expensive water cooling system. If the vehicle-mounted vacuum insulation box is placed in a large vacuum brazing furnace for overall heating, the energy consumption will be huge and the processing energy cost will be high. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a vehicle-mounted vacuum insulation box brazing device and method to solve the problem of large energy consumption and high investment cost caused by overall heating using a large vacuum brazing furnace.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] On the one hand, the present invention provides a vehicle-mounted vacuum insulation box brazing device, which is used for brazing of the vehicle-mounted vacuum insulation box. The vehicle-mounted vacuum insulation box includes a lower box and an upper cover. The vehicle-mounted vacuum insulation box brazing device includes a glass-based brazing flux column, a vacuum brazing sealing box, a robot and an end effector arranged at the end of the robot, wherein the lower box is placed in the vacuum brazing sealing box and evacuated, the lower box is a square structure, and the side wall has a hollow cavity, the four corners of the lower box are provided with brazing grooves connected to the hollow cavity, and a glass-based brazing flux column is inserted in each brazing groove; the top of the vacuum brazing sealing box is provided with a high-temperature resistant perspective window; the end effector includes a camera and a laser head, and the camera and the laser head respectively collect position information and perform brazing melting on the glass-based brazing flux column through the high-temperature resistant perspective window.

[0006] In one possible implementation, the lower box includes an inner liner, an outer liner and insulating ceramics, wherein the inner liner is arranged on the inner side of the outer liner, and the hollow cavity is formed between the inner liner and the outer liner, the tops of the inner liner and the outer liner both have an insulating gap connected to the hollow cavity, and the inner surface of the outer liner is provided with a plurality of insulating ceramics accommodated in the hollow cavity; a sealing fillet flat weld is welded at the top gap between the inner liner and the outer liner, and corner filling blocks are filled in the cavities at the four corners of the inner liner and the outer liner, the height of the corner filling blocks is less than the height of the sealing fillet flat weld, and the brazing groove is formed at the top of the corner filling blocks, and the insulating gap between the inner liner and the outer liner is exposed in the brazing groove; a blind hole is provided on the top of the corner filling block, and the glass-based brazing flux column is inserted in the blind hole; when the vacuum brazing sealing box is evacuated, the hollow cavity in the side wall of the lower box is evacuated.

[0007] In a possible implementation, the inner liner is manufactured by cutting a sheet metal into a cross shape, bending the four sides upward by 90 degrees, and then bending the upper edge outward by 180 degrees to form an inner liner side wall with an inner liner heat insulation gap at the upper end, the top of the inner liner side wall is an inner liner bending fillet, and welding two adjacent inner liner side walls to form an inner side sealing fillet vertical weld;

[0008] In one possible implementation, the outer liner is manufactured as follows: another piece of sheet metal is cut into a cross shape, and the four sides are bent upward 90 degrees, and then the upper edge is bent inward 180 degrees to form an outer liner side wall with an outer liner insulation gap at the upper end, the top of the outer liner side wall is the outer liner bending fillet, and the two adjacent outer liner side walls are welded to form an outer sealing fillet vertical weld; the sealing fillet flat weld is welded between the inner liner bending fillet and the outer liner bending fillet; the corner filling block is filled between the inner sealing fillet vertical weld and the outer sealing fillet vertical weld.

[0009] In a possible implementation, a plurality of stainless steel springs are welded on the inner surface of the outer shell, and the stainless steel springs are in an Ω-shaped structure with an opening at the bottom; and the thermal insulation ceramic is in a C-shaped structure clamped with the open ends of the stainless steel springs.

[0010] In a possible implementation, the vacuum brazing sealing box includes a box body and a box cover, and the high temperature resistant perspective window is provided on the box cover.

[0011] In one possible implementation, the outer side of the lower box is covered with a lower box covering layer, the inner side of the upper cover is covered with an upper cover covering layer, and an elastic guide angle is provided at the edge of the upper cover covering layer; after the upper cover is buckled on the lower box, a top surface ring sealing extrusion band and a side ring sealing extrusion band are formed between the upper cover covering layer and the lower box covering layer at the top and outer side wall of the lower box.

[0012] In a possible implementation, there are multiple vacuum brazing sealing boxes, which are circumferentially arranged on the outside of the robot.

[0013] Another aspect of the present invention provides a brazing method using the above-mentioned vehicle-mounted vacuum insulation box brazing device, comprising the following steps:

[0014] Step S1: preparing a lower box of a square structure, wherein the side wall of the lower box has a hollow cavity, and the tops of the four corners of the lower box have brazing grooves connected to the hollow cavity;

[0015] Step S2: inserting glass-based brazing flux columns into the four brazing grooves on the top of the lower box, and then placing the lower box in a vacuum brazing sealing box;

[0016] Step S3: evacuating the vacuum brazing sealing box to achieve evacuation of the hollow cavity in the side wall of the lower box;

[0017] Step S4: The robot collects the position information of the glass-based brazing flux column at the high temperature resistant perspective window of the vacuum brazing sealing box through a camera and outputs it;

[0018] Step S5: The laser head emits laser to the glass-based brazing flux column to heat and melt the glass-based brazing flux column and fill the brazing groove;

[0019] Step S6: completing the brazing of four glass-based brazing flux columns in sequence;

[0020] Step S7: The vacuum brazing sealing box is broken, the lower box is taken out, and the vacuum brazing of the lower box is completed.

[0021] In step S1, the preparation process of the lower box includes the following steps:

[0022] Step N1: Prepare the liner, cut a sheet metal into a cross shape, bend the four sides upwards 90 degrees, and then bend the upper end outwards 180 degrees to form an liner side wall with an liner heat insulation gap at the upper part, the top of the liner side wall is the liner bending fillet, and weld two adjacent liner side walls to form an inner side sealing fillet vertical weld;

[0023] Step N2: Prepare the outer bladder, cut another sheet metal into a cross shape, bend the four sides upwards 90 degrees, and then bend the upper end inwards 180 degrees to form an outer bladder side wall with an outer bladder heat insulation gap at the upper end, the top of the outer bladder side wall is the outer bladder bending fillet, and weld two adjacent outer bladder side walls to form an outer sealed fillet vertical weld;

[0024] Step N3: fixing a plurality of heat-insulating ceramics on the inner surface of the outer container;

[0025] Step N4: embedding the inner liner in the outer liner to form a hollow cavity between the inner liner and the outer liner; welding the gap between the inner liner and the outer liner to seal the fillet and form a flat weld;

[0026] Step N5: Filling a corner filling block into the cavity formed between the inner sealing fillet vertical weld and the outer sealing fillet vertical weld, wherein the height of the corner filling block is lower than the sealing fillet flat weld, forming a brazing groove at the top of the corner filling block, and the inner liner insulation gap and the outer liner insulation gap are exposed at the brazing groove;

[0027] Step N6: a blind hole is formed on the upper surface of the corner filling block.

[0028] In one possible implementation, when the upper end of the sheet metal is bent inward or outward, an outer liner insulation gap and an inner liner insulation gap are formed by placing bent thin gaskets on the inner and outer sides of the sheet metal.

[0029] The advantages and beneficial effects of the present invention are as follows: the present invention provides a vehicle-mounted vacuum insulation box brazing device and method, which heats the local position of the brazing workpiece by laser on the outside of the vacuum box, which is energy-saving and environmentally friendly, reduces costs, and improves work efficiency; multiple small vacuum boxes are used to dissipate heat quickly, which has advantages in production cycle and cost.

[0030] Since the present invention uses multiple small vacuum boxes, the robot and the laser heater of the end effector and the robot vision have high utilization rates. While the robot vision detects the position of the next heating brazing position, the robot laser heats the brazing position of the position. Therefore, the laser heater and the robot vision can work synchronously.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0032] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 This is an axonometric diagram of a vehicle-mounted vacuum insulation box brazing device of the present invention;

[0035] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0036] Figure 3 It is a partial cross-sectional schematic diagram of the vehicle-mounted vacuum insulation box of the present invention;

[0037] Figure 4 It is an axonometric view of the lower box in the present invention;

[0038] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0039] Figure 6 It is a partial top view of the lower box in the present invention;

[0040] Figure 7 for Figure 4 A partial enlarged view of point C in the middle;

[0041] Figure 8 It is an axonometric view of the outer bladder in the present invention;

[0042] Fig. 9 for Figure 8 A partial enlarged view of point D in the middle;

[0043] Fig.10 It is a partial cross-sectional view of the lower box in the present invention;

[0044] Fig.11 This is an expanded view of the inner liner sheet metal in the present invention;

[0045] Fig.12 This is an expanded view of the outer bladder sheet metal of the present invention;

[0046] Fig.13 It is a schematic diagram of the partial bending of the outer bladder sheet metal in the present invention.

[0047] In the figure: 1-inner liner, 101-bottom surface of inner liner, 102-long side surface of inner liner, 103-folded edge surface of long side of inner liner, 104-short side surface of inner liner, 105-folded edge surface of short side of inner liner, 106-bending fillet of long side of inner liner, 107-bending fillet of short side of inner liner, 108-insulating gap of inner liner, 2-outer liner, 201-bottom surface of outer liner, 202-long side surface of outer liner, 203-folded edge surface of long side of outer liner, 204-short side surface of outer liner, 205-folded edge surface of short side of outer liner, 206-bending fillet of long side of outer liner, 207-bending fillet of short side of outer liner, 208-insulating gap of outer liner, 3-stainless steel spring piece, 4-welding point, 5-insulating ceramic, 6-inner sealing fillet Vertical weld, 7-outer side sealing fillet vertical weld, 8-long side sealing fillet flat weld, 9-short side sealing fillet flat weld, 10-corner filling block, 1001-blind hole, 11-glass-based brazing flux column, 12-bent thin gasket, 13-vacuum brazing sealing box, 1301-box cover, 1302-box body, 1303-high temperature resistant perspective window, 14-robot, 15-end effector, 1501-camera, 1502-laser head, 16-lower box, 17-lower box coating, 18-upper cover coating, 19-upper cover, 20-top surface ring sealing extrusion belt, 21-side ring sealing extrusion belt, 22-air ring cavity, 23-elastic guide angle. DETAILED DESCRIPTION

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0050] An embodiment of the present invention provides a vehicle-mounted vacuum insulation box brazing device, which heats the local position of the brazing workpiece by laser outside the vacuum box, saves energy and protects the environment, reduces costs, and improves work efficiency. Figures 1 to 3As shown, the vehicle-mounted vacuum insulation box brazing device is used for brazing the vehicle-mounted vacuum insulation box. The vehicle-mounted vacuum insulation box includes a lower box 16 and an upper cover 19. The vehicle-mounted vacuum insulation box brazing device includes a glass-based brazing flux column 11, a vacuum brazing sealing box 13, a robot 14, and an end effector 15 arranged at the end of the robot 14. The lower box 16 is placed in the vacuum brazing sealing box 13 and evacuated. The lower box 16 is a square structure, and the side wall has a hollow cavity. The top of the four corners is provided with a brazing groove connected to the hollow cavity, and a glass-based brazing flux column 11 is inserted in each brazing groove; a high-temperature resistant perspective window 1303 is provided on the top of the vacuum brazing sealing box 13; the end effector 15 includes a camera 1501 and a laser head 1502, and the camera 1501 and the laser head 1502 respectively collect position information and perform brazing melting of the glass-based brazing flux column 11 through the high-temperature resistant perspective window 1303, and the brazing groove will be filled due to the tension of the metal liquid.

[0051] See also Figure 1 As shown, in the embodiment of the present invention, the vacuum brazing sealing box 13 has a small volume, fast heat dissipation, and low energy consumption. Preferably, there are multiple vacuum brazing sealing boxes 13, and they are arranged circumferentially outside the robot 14. Using multiple vacuum brazing sealing boxes 13 has advantages in production cycle and cost, and improves work efficiency.

[0052] See also Figure 2 As shown, in the embodiment of the present invention, the vacuum brazing sealed box 13 includes a box body 1302 and a box cover 1301. The box body 1302 is a rectangular parallelepiped structure. The box cover 1301 is buckled on the top of the box body 1302 and sealed with the box body 1302. A high temperature resistant perspective window 1303 is provided on the box cover 1301. Specifically, the high temperature resistant perspective window 1303 is made of a quartz transparent member.

[0053] See also Figure 3 As shown, in the embodiment of the present invention, the outer side of the lower box 16 is covered with a lower box covering layer 17, the inner side of the upper cover 19 is covered with an upper cover covering layer 18, and an elastic guide angle 23 is provided at the edge of the upper cover covering layer 18, and the elastic guide angle 23 is used for extrusion guidance during the closing process; after the upper cover 19 is buckled on the lower box 16, a top surface ring sealing extrusion band 20 and a side ring sealing extrusion band 21 are formed between the upper cover covering layer 18 and the lower box covering layer 17 at the top and outer side wall of the lower box 16.

[0054] Specifically, the upper cover 19 and the lower box 16 are made of food-grade stainless steel plates, preferably grade 316L stainless steel. The upper cover 19 and the lower box 16 adopt the same characteristic manufacturing process. The materials of the upper cover coating layer 18 and the lower box coating layer 17 are both made of fluororubber. Since the connection angle between the upper plane and the side plane of the upper cover 19 is smaller than the outer bending angle of the upper opening of the lower box 16, and since an air ring cavity 22 is contained between the top surface ring sealing extrusion belt 20 and the side surface ring sealing extrusion belt 21, the air ring cavity 22 ensures the sealing of the top surface ring sealing extrusion belt 20 and the side surface ring sealing extrusion belt 21. Another function of the air ring cavity 22 is heat preservation, because the air ring cavity 22 is a closed cavity, due to the poor air flowability, the heat preservation effect is good.

[0055] See also Figures 4 to 10 As shown, in the embodiment of the present invention, the lower box 16 includes an inner liner 1, an outer liner 2 and a heat-insulating ceramic 5, wherein the inner liner 1 is arranged on the inner side of the outer liner 2, and a hollow cavity is formed between the inner liner 1 and the outer liner 2, the tops of the inner liner 1 and the outer liner 2 both have a heat-insulating gap connected to the hollow cavity, and the inner surface of the outer liner 2 is provided with a plurality of heat-insulating ceramics 5 accommodated in the hollow cavity; a flat weld is welded to seal the fillet at the top gap between the inner liner 1 and the outer liner 2, and the cavities at the four corners of the inner liner 1 and the outer liner 2 are sealed. A corner filling block 10 is filled inside, and the height of the corner filling block 10 is less than the height of the sealed fillet flat weld. A brazing groove is formed on the top of the corner filling block 10, and the insulation gap between the inner liner 1 and the outer liner 2 is exposed inside and outside the brazing groove for vacuum exhaust. A blind hole 1001 is provided on the top of the corner filling block 10, and a glass-based brazing flux column 11 is inserted into the blind hole 1001. When the vacuum brazing sealing box 13 is evacuated, the vacuumization of the hollow cavity in the side wall of the lower box 16 is achieved.

[0056] See also Fig. 9 As shown, in the embodiment of the present invention, a plurality of stainless steel spring sheets 3 are welded on the inner surface of the outer liner 2 through welding points 4, and the stainless steel spring sheets 3 are an Ω-shaped structure with an opening at the bottom; the insulating ceramic 5 is a C-shaped structure clamped with the open end of the stainless steel spring sheet 3.

[0057] Specifically, a plurality of stainless steel springs 3 are welded through corresponding welding points 4 and are evenly distributed on the five inner surfaces of the outer liner 2. The width of the stainless steel spring 3 is orthogonal to the surface of the outer liner 2 to which it is welded, and the stainless steel spring 3 clamps the insulating ceramic 5 through elastic force. The thickness of the C-shaped insulating ceramic 5 is greater than the width of the stainless steel spring 3, and the two surfaces of the insulating ceramic 5 are frosted surfaces, which help to reduce the solid conduction thermal resistance. After the hollow cavity between the inner liner 1 and the outer liner 2 is evacuated, the two surfaces of the insulating ceramic 5 resist the atmospheric pressure between the inner liner 1 and the outer liner 2 to avoid the problem of collapse due to atmospheric pressure. The inner surfaces of the inner liner 1 and the outer liner 2 are silver-plated to reduce the heat conduction of thermal radiation.

[0058] See also Figure 5-7 , Fig.10 , Fig.11As shown, in the embodiment of the present invention, the manufacturing process of the inner liner 1 is: a piece of sheet metal is cut into a cross shape and the four side surfaces are bent upward by 90 degrees and then the upper edge is bent outward by 180 degrees to form an inner liner side wall with an inner liner insulation gap 108 at the upper end, the top of the inner liner side wall is the inner liner bending fillet, and the two adjacent inner liner side walls are welded to form an inner side sealing fillet vertical weld 6.

[0059] Specifically, the liner 1 includes an liner bottom surface 101, an liner long side surface 102, an liner long side folding surface 103, an liner short side surface 104 and an liner short side folding surface 105. The liner long side surface 102 is bent upward by 90 degrees, and the liner long side folding surface 103 is located at the outer end of the liner long side surface 102. The liner long side folding surface 103 is bent outward by 180 degrees, and a liner long side bending fillet 106 is formed between the liner long side surface 102 and the liner long side folding surface 103; the liner short side surface 104 is bent upward by 90 degrees, and the liner short side folding surface 105 is located at the outer end of the liner short side surface 104. The liner short side folding surface 105 is bent outward by 180 degrees, and a liner short side bending fillet 107 is formed between the liner short side surface 104 and the liner short side folding surface 105. The inner liner short side surface 104 and the inner liner long side surface 102 are welded by the inner side sealing fillet vertical weld 6 , and the inner side sealing fillet vertical weld 6 is also welded to the corner filling block 10 .

[0060] See also Figure 6 , Fig.10 , Fig.12 As shown, in the embodiment of the present invention, the manufacturing process of the outer bladder 2 is: another piece of sheet metal is cut into a cross shape and the four sides are bent upward by 90 degrees and then the upper edge is bent inward by 180 degrees to form an outer bladder side wall with an outer bladder insulation gap 208 at the upper end, the top of the outer bladder side wall is the outer bladder bending fillet, and the two adjacent outer bladder side walls are welded to form an outer sealed fillet vertical weld 7; a sealed fillet flat weld is welded between the inner bladder bending fillet and the outer bladder bending fillet; and a corner filling block 10 is filled between the inner side sealed fillet vertical weld 6 and the outer side sealed fillet vertical weld 7.

[0061] Specifically, the outer bladder 2 includes an outer bladder bottom surface 201, an outer bladder long side surface 202, an outer bladder long side folding surface 203, an outer bladder short side surface 204 and an outer bladder short side folding surface 205. The outer bladder long side surface 202 is bent upward by 90 degrees, the outer bladder long side folding surface 203 is located on the outside of the outer bladder long side surface 202, and the outer bladder long side folding surface 203 is bent inward by 180 degrees, and an outer bladder long side bending fillet 206 is formed between the outer bladder long side surface 202 and the outer bladder long side folding surface 203; the outer bladder short side surface 204 is bent upward by 90 degrees, the outer bladder short side folding surface 205 is located on the outer end of the outer bladder short side surface 204, the outer bladder short side folding surface 205 is bent inward by 180 degrees, and an outer bladder short side bending fillet 207 is formed between the outer bladder short side surface 204 and the outer bladder short side folding surface 205. The short side surface 204 of the outer liner and the long side surface 202 of the outer liner are welded by an outer sealing fillet vertical weld 7 .

[0062] Fig.11 This is the expanded view of the inner liner sheet metal in the present invention. Fig.12 This is an expanded view of the outer bladder sheet metal of the present invention. The "upper" and "lower" marked in the figure refer to the bending direction, 90° and 180° refer to the bending angles, and R represents the bending value.

[0063] See also Figures 10 to 13 As shown, in the process of the four folded edges of the inner liner 1 turning outward and the four folded edges of the outer liner 2 turning inward, the thickness of the inner liner insulation gap 108 and the outer liner insulation gap 208 are controlled by bending the thin gasket 12. Specifically, the thickness of the bent thin gasket 12 is 0.02 mm.

[0064] See also Figures 5 to 7 As shown, the gap between the long side bend fillet 106 of the inner liner and the long side bend fillet 206 of the outer liner is welded to the long side sealing fillet flat weld 8, and the gap between the short side bend fillet 107 of the inner liner and the short side bend fillet 207 of the outer liner is welded to the short side sealing fillet flat weld 9. The upper plane of the corner filling block 10 is lower than the inner liner bending fillet and the outer liner bending fillet, respectively leaking a section of the inner liner insulation gap 108 and the outer liner insulation gap 208 on the side for vacuum exhaust. Therefore, four pits, i.e., brazing grooves, are formed on the upper plane of the corner filling block 10 at the four corners. The upper plane of the corner filling block 10 contains a blind hole 1001, into which a glass-based brazing flux column 11 is inserted.

[0065] See also Figure 1As shown, in an embodiment of the present invention, the vacuum brazing sealing box 13 is arranged around the robot 14, and this embodiment is eighteen vacuum brazing sealing boxes 13. The robot 14 can provide the position and posture of the end effector 15 in space. A single robot 14 and multiple vacuum brazing sealing boxes 13 can effectively improve the utilization rate of the robot 14 and its end effector 15. The vacuum brazing sealing box 13 is placed in a stainless steel box, sealed, and vacuum is established. The camera 1501 is used to position the glass-based brazing flux column 11 in the vacuum brazing sealing box 13, and the laser head 1502 is used for brazing and melting the glass-based brazing flux column 11. The glass-based brazing molten pool will fill the brazing groove above the corner filling block 10 due to the tension of the metal liquid. The stainless steel box conducts heat to dissipate heat, breaks the vacuum, and takes out the stainless steel box. Among them, the end effector 15 accounts for a very small proportion of its positioning and brazing heating process time, which improves the utilization rate of the robot 14 and its end effector 15.

[0066] Since the present invention uses multiple small vacuum boxes, the robot and the laser heater of the end effector and the robot vision have high utilization rates. While the robot vision detects the position of the next heating brazing position, the robot laser heats the brazing position of the position. Therefore, the laser heater and the robot vision can work synchronously.

[0067] Another embodiment of the present invention provides a brazing method using the above-mentioned vehicle-mounted vacuum insulation box brazing device, comprising the following steps:

[0068] Step S1: preparing a lower box 16 of a square structure, wherein the side wall of the lower box 16 has a hollow cavity, and the tops of the four corners of the lower box 16 have brazing grooves connected to the hollow cavity;

[0069] Step S2: inserting glass-based solder flux columns 11 into four soldering grooves on the top of the lower box 16, and then placing the lower box 16 in a vacuum soldering sealing box 13;

[0070] Step S3: vacuuming the vacuum brazing sealing box 13 to achieve vacuuming of the hollow cavity in the side wall of the lower box 16;

[0071] Step S4: the robot 14 collects the position information of the glass-based solder flux column 11 at the high temperature resistant perspective window 1303 of the vacuum soldering sealing box 13 through the camera 1501 and outputs it;

[0072] Step S5: the laser head 1502 emits laser onto the glass-based solder column 11 to heat and melt the glass-based solder column 11 and fill the soldering groove;

[0073] Step S6: completing the brazing of four glass-based solder flux columns 11 in sequence;

[0074] Step S7: The vacuum brazing sealing box 13 is broken, the lower box 16 is taken out, and the vacuum brazing of the lower box 16 is completed.

[0075] In step S1, the preparation process of the lower box 16 includes the following steps:

[0076] Step N1: prepare an inner liner 1, cut a sheet metal into a cross shape, bend the four sides upward 90 degrees, and then bend the upper end outward 180 degrees to form an inner liner side wall with an inner liner heat insulation gap 108 at the upper part, the top of the inner liner side wall is an inner liner bending fillet, and weld two adjacent inner liner side walls to form an inner side sealing fillet vertical weld 6;

[0077] Step N2: prepare the outer bladder 2, cut another sheet metal into a cross shape, bend the four sides upward 90 degrees, and then bend the upper end inward 180 degrees to form an outer bladder side wall with an outer bladder heat insulation gap 208 at the upper end, the top of the outer bladder side wall is the outer bladder bending fillet, and weld two adjacent outer bladder side walls to form an outer sealing fillet vertical weld 7;

[0078] Step N3: fixing a plurality of heat-insulating ceramics 5 on the inner surface of the outer liner 2;

[0079] Step N4: embed the inner liner 1 in the outer liner 2 to form a hollow cavity between the inner liner 1 and the outer liner 2; weld and seal the gap between the inner liner and the outer liner by filling the corner with a flat weld;

[0080] Step N5: Fill the cavity formed between the inner sealing fillet vertical weld 6 and the outer sealing fillet vertical weld 7 with a corner filling block 10, wherein the height of the corner filling block 10 is lower than the sealing fillet flat weld, and a brazing groove is formed on the top of the corner filling block 10, and the inner liner insulation gap 108 and the outer liner insulation gap 208 are exposed at the brazing groove;

[0081] Step N6: a blind hole 1001 is formed on the upper surface of the corner filling block 10 .

[0082] Furthermore, when the upper end of the sheet metal is bent inward or outward, an outer liner insulation gap 208 and an inner liner insulation gap 108 are formed by placing a bending thin gasket 12 on the inner and outer sides of the sheet metal.

[0083] The present invention provides a vehicle-mounted vacuum insulation box brazing device and method, which heats a local position of a brazing workpiece by laser outside the vacuum box, saves energy and is environmentally friendly, reduces costs, and improves work efficiency; multiple small vacuum boxes are used for fast heat dissipation, which has advantages in production cycle and cost.

[0084] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A vehicle-mounted vacuum insulation box brazing device, used for brazing a vehicle-mounted vacuum insulation box, the vehicle-mounted vacuum insulation box comprising a lower box (16) and an upper cover (19), characterized in that: The vehicle-mounted vacuum insulation box brazing device comprises a glass-based brazing flux column (11), a vacuum brazing sealing box (13), a robot (14), and an end effector (15) arranged at the end of the robot (14), wherein a lower box (16) is placed in the vacuum brazing sealing box (13) and evacuated, the lower box (16) is a square structure, and the side wall has a hollow cavity, the top of the four corners of the lower box (16) is provided with a brazing groove connected to the hollow cavity, and the glass-based brazing flux column (11) is inserted into each brazing groove; the top of the vacuum brazing sealing box (13) is provided with a high-temperature resistant perspective window (1303); the end effector (15) comprises a camera (1501) and a laser head (1502), and the camera (1501) and the laser head (1502) respectively collect position information of the glass-based brazing flux column (11) and perform brazing melting through the high-temperature resistant perspective window (1303); The lower box (16) comprises an inner liner (1), an outer liner (2) and thermal insulation ceramics (5), wherein the inner liner (1) is arranged on the inner side of the outer liner (2), and the inner liner (1) and the outer liner (2) form the hollow cavity, the tops of the inner liner (1) and the outer liner (2) both have thermal insulation gaps communicating with the hollow cavity, and the inner surface of the outer liner (2) is provided with a plurality of thermal insulation ceramics (5) accommodated in the hollow cavity; a flat weld is welded to seal the fillet at the top gap between the inner liner (1) and the outer liner (2), and the four corners of the inner liner (1) and the outer liner (2) are sealed. A corner filling block (10) is filled in the cavity, the height of the corner filling block (10) is less than the height of the sealed corner flat weld, the brazing groove is formed at the top of the corner filling block (10), and the thermal insulation gap between the inner liner (1) and the outer liner (2) is exposed inside and outside the brazing groove; a blind hole (1001) is provided at the top of the corner filling block (10), and the glass-based brazing flux column (11) is inserted into the blind hole (1001); when the vacuum brazing sealing box (13) is evacuated, the hollow cavity in the side wall of the lower box (16) is evacuated.

2. The vehicle-mounted vacuum insulation box brazing device according to claim 1, characterized in that: The manufacturing process of the inner liner (1) is as follows: a sheet metal is cut into a cross shape, and the four sides are bent upward by 90 degrees, and then the upper edge is bent outward by 180 degrees to form an inner liner side wall with an inner liner heat insulation gap (108) at the upper end, the top of the inner liner side wall is an inner liner bending fillet, and two adjacent inner liner side walls are welded to form an inner side sealing fillet vertical weld (6); The outer bladder (2) is manufactured by cutting another sheet metal into a cross shape, bending the four side surfaces upwards by 90 degrees, and then bending the upper edge inwards by 180 degrees to form an outer bladder side wall with an outer bladder heat insulation gap (208) at the upper end, the top of the outer bladder side wall being an outer bladder bending fillet, welding two adjacent outer bladder side walls to form an outer side sealing fillet vertical weld (7); welding the sealing fillet flat weld between the inner bladder bending fillet and the outer bladder bending fillet; and filling the inner side sealing fillet vertical weld (6) and the outer side sealing fillet vertical weld (7) with the corner filling block (10).

3. The vehicle-mounted vacuum insulation box brazing device according to claim 1, characterized in that: A plurality of stainless steel spring sheets (3) are welded on the inner surface of the outer liner (2), and the stainless steel spring sheets (3) are of an Ω-shaped structure with an opening at the bottom; and the heat-insulating ceramic (5) is of a C-shaped structure that is clamped with the open ends of the stainless steel spring sheets (3).

4. The vehicle-mounted vacuum insulation box brazing device according to claim 1, characterized in that: The vacuum brazing sealing box (13) comprises a box body (1302) and a box cover (1301), and the box cover (1301) is provided with the high temperature resistant perspective window (1303).

5. The vehicle-mounted vacuum insulation box brazing device according to claim 1, characterized in that: The outer side of the lower box (16) is covered with a lower box covering layer (17), and the inner side of the upper cover (19) is covered with an upper cover covering layer (18). An elastic guide angle (23) is provided at the edge of the upper cover covering layer (18); after the upper cover (19) is buckled onto the lower box (16), a top surface ring sealing extrusion band (20) and a side surface ring sealing extrusion band (21) are formed between the upper cover covering layer (18) and the lower box covering layer (17) at the top and outer side wall of the lower box (16).

6. The vehicle-mounted vacuum insulation box brazing device according to claim 1, characterized in that: There are a plurality of vacuum brazing sealing boxes (13), which are arranged circumferentially outside the robot (14).

7. A brazing method using the vehicle-mounted vacuum insulation box brazing device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1: preparing a lower box (16) of a square structure, wherein the side wall of the lower box (16) has a hollow cavity, and the tops of the four corners of the lower box (16) have brazing grooves connected to the hollow cavity; Step S2: inserting glass-based solder flux columns (11) into four soldering grooves on the top of the lower box (16), and then placing the lower box (16) in a vacuum soldering sealing box (13); Step S3: evacuating the vacuum brazing sealing box (13) to achieve evacuation of the hollow cavity in the side wall of the lower box (16); Step S4: the robot (14) collects position information of the glass-based solder flux column (11) at the high temperature resistant perspective window (1303) of the vacuum soldering sealing box (13) through the camera (1501) and outputs the information; Step S5: the laser head (1502) emits laser light onto the glass-based solder column (11), heats and melts the glass-based solder column (11), and fills the soldering groove; Step S6: completing the brazing of four glass-based brazing flux columns (11) in sequence; Step S7: The vacuum brazing sealing box (13) is broken, the lower box (16) is taken out, and the vacuum brazing of the lower box (16) is completed.

8. The brazing method according to claim 7, characterized in that: In step S1, the preparation process of the lower box (16) includes the following steps: Step N1: preparing an inner liner (1), cutting a sheet metal into a cross shape, bending the four sides upwards by 90 degrees, and then bending the upper end outwards by 180 degrees to form an inner liner side wall with an inner liner heat insulation gap (108) at the upper portion, the top of the inner liner side wall being an inner liner bending fillet, and welding two adjacent inner liner side walls to form an inner side sealing fillet vertical weld (6); Step N2: preparing an outer bladder (2), cutting another sheet metal into a cross shape, bending the four sides upwards by 90 degrees, and then bending the upper end inwards by 180 degrees to form an outer bladder side wall with an outer bladder heat insulation gap (208) at the upper end, the top of the outer bladder side wall is an outer bladder bending fillet, and welding two adjacent outer bladder side walls to form an outer sealing fillet vertical weld (7); Step N3: fixing a plurality of heat-insulating ceramics (5) on the inner surface of the outer liner (2); Step N4: embedding the inner liner (1) in the outer liner (2) to form a hollow cavity between the inner liner (1) and the outer liner (2); welding the gap between the inner liner and the outer liner to seal the fillet by flat welding; Step N5: filling a corner filling block (10) in the cavity formed between the inner side sealing fillet vertical weld (6) and the outer side sealing fillet vertical weld (7), wherein the height of the corner filling block (10) is lower than the sealing fillet flat weld, forming a brazing groove at the top of the corner filling block (10), and the inner liner insulation gap (108) and the outer liner insulation gap (208) are exposed at the brazing groove; Step N6: a blind hole (1001) is formed on the upper surface of the corner filling block (10).

9. The brazing method according to claim 8, characterized in that: When the upper end of the sheet metal is bent inward or outward, an outer liner heat insulation gap (208) and an inner liner heat insulation gap (108) are formed by placing a bent thin gasket (12) on the inner and outer sides of the sheet metal.

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