Welding device

Abstract

The welding device comprises a machine frame, a carrier, a main body and a negative pressure mechanism, the carrier is provided with an opening, at least part of the edge of the opening is used for bearing COB products, the main body is installed on the machine frame and comprises a lower heating furnace, a heat transfer piece and an upper heating furnace, and one of the lower heating furnace and the upper heating furnace is provided with a butt joint hole. The heat transfer part is installed on the top face of the lower heating furnace and can penetrate through the opening to make contact with the COB product, the upper heating furnace and the lower heating furnace can be far away from or close to each other, the upper heating furnace and the lower heating furnace are used for clamping a carrier, a closed space is formed between the upper heating furnace and the lower heating furnace, and the butt joint hole communicates with the closed space; the negative pressure mechanism communicates with the butt joint hole and is used for generating negative pressure in the closed space. According to the scheme, the voidage of the welding area can be greatly reduced, so that the quality of a COB product is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of COB product welding, in particular to a welding device. Background Art

[0002] "COB" means "Chip on Board", which means packaging the chip directly on the circuit board instead of using the traditional packaging method. Since this technology can improve the integration and reliability of the circuit and reduce the size and weight of the circuit board, it is widely used in electronic devices and sensors that require high density and high performance.

[0003] For products using COB packaging, ordinary reflow or protective gas reflow soldering is usually used. Using existing welding equipment for welding can easily cause the COB product to be deformed after welding, and there are pores or oxides in the welding area, causing the gas to be enclosed in the solder. The welding void rate exceeds 20%, resulting in a decrease in life and reliability, or the thermal resistance of the COB product to be welded is too large, affecting the efficacy. Utility Model Content

[0004] The main purpose of the utility model is to provide a welding device, aiming at improving the welding effect.

[0005] To achieve the above object, the utility model provides a welding device, comprising:

[0006] frame;

[0007] A carrier, wherein the carrier is provided with an opening, and at least a portion of the edge of the opening is used to support the COB product;

[0008] A main body, the main body is installed on the frame, the main body includes a lower heating furnace, a heat transfer element and an upper heating furnace, one of the lower heating furnace and the upper heating furnace is provided with a docking hole, the heat transfer element is installed on the top surface of the lower heating furnace, the heat transfer element can pass through the opening to contact the COB product, the upper heating furnace and the lower heating furnace can be far away from or close to each other, the upper heating furnace and the lower heating furnace are used to clamp the carrier, and form a closed space between the upper heating furnace and the lower heating furnace, and the docking hole is connected to the closed space;

[0009] A negative pressure mechanism is connected to the docking hole and is used to create negative pressure in the enclosed space.

[0010] In some embodiments of the utility model, a lower furnace cavity is provided in the lower heating furnace, a first ventilation hole and a first mounting port are provided on the top wall of the lower furnace cavity, the heat transfer element is installed at the first mounting port, and the cavity wall of the lower furnace cavity is provided with the docking hole.

[0011] In some embodiments of the utility model, the lower heating furnace includes a lower furnace body, a first thermal insulation member and a first heating lamp tube. The lower furnace body is recessed with a first assembly groove in a direction away from the upper heating furnace. The first thermal insulation member is nested in the first assembly groove. The lower furnace cavity is provided in the first thermal insulation member. The two ends of the first heating lamp tube are installed on the two side walls of the lower furnace cavity in the horizontal direction.

[0012] In some embodiments of the present invention, the welding device also includes a control module and a temperature measuring component, the temperature measuring component is connected to the heat transfer component, the control module is electrically connected to the temperature measuring component and the first heating lamp, and the control module is used to receive the temperature signal of the temperature measuring component and control the heating power of the first heating lamp.

[0013] In some embodiments of the present invention, the welding device further comprises a vacuum degree measuring instrument, which is electrically connected to the control module and is used to detect the vacuum degree in the enclosed space and send a detection signal to the control module.

[0014] In some embodiments of the utility model, the temperature measuring component includes a temperature measuring head and a mounting block, the mounting block is installed on the inner side of the heat transfer component, the mounting block is provided with a plug hole, the inner side of the heat transfer component is provided with a temperature measuring hole, the temperature measuring head passes through the plug hole and is assembled in the temperature measuring hole.

[0015] In some embodiments of the present invention, the heat transfer element includes an inner plate body and an outer plate body which are stacked, the inner plate body is provided with the temperature measuring hole, and the outer plate body is used to support the COB product.

[0016] In some embodiments of the utility model, the upper heating furnace comprises an upper furnace body, a second heat insulating member, a second heating lamp tube and a pressing plate, and a second assembly groove is provided on the bottom surface of the upper furnace body;

[0017] The second heat insulating member is nested in the second assembly groove, an upper furnace cavity is arranged in the second heat insulating member, and a second installation opening is opened on the bottom wall of the upper furnace cavity;

[0018] The two ends of the second heating lamp are installed on the two side walls of the upper furnace cavity in the horizontal direction, and the second heating lamp is electrically connected to the control module;

[0019] The pressing plate is installed at the second installation opening, and the pressing plate is used to press the COB product.

[0020] In some embodiments of the present invention, water cooling channels are provided in both the upper furnace body and the lower furnace body.

[0021] In some embodiments of the present invention, a sealing ring is disposed around the bottom surface of the upper furnace body and the top surface of the lower furnace body.

[0022] In some embodiments of the present invention, a plurality of the first ventilation holes are provided, and the plurality of the first ventilation holes are distributed on both sides of the first mounting opening in a width direction and are arranged at intervals along a length direction of the first mounting opening.

[0023] In some embodiments of the present invention, the carrier is provided with a second ventilation hole.

[0024] When the welding device of the utility model welds the COB product, it is placed on a carrier, and the carrier is clamped by the upper heating furnace and the lower heating furnace to form a closed space inside the COB product and heat it. The heat is guided to the COB product through the heat transfer component to melt the solid solder paste on its surface into liquid tin water. At this time, negative pressure is created in the closed space by the negative pressure mechanism, so that the bubbles generated by the flux in the molten tin are discharged due to the pressure difference. Finally, the tin solder is solidified to complete the welding. The welding device of the utility model can greatly reduce the void rate of the welding area, thereby improving the quality of COB products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A structural schematic diagram of an embodiment of a welding device provided by the utility model;

[0027] Figure 2 It is a structural schematic diagram of the carrier and the main body of the utility model.

[0028] Description of Figure Numbers:

[0029] 100, welding device; 10, frame; 11, gantry; 12, sliding beam; 13, driving member; 20, lower heating furnace; 21, first vent hole; 22, lower furnace cavity; 23, first mounting port; 24, docking hole; 25, lower furnace body; 251, first assembly groove; 26, first heat insulation member; 27, first heating lamp; 30, carrier; 31, opening; 32, second vent hole; 40, heat transfer member; 41, inner plate; 4 11. Temperature measuring hole; 42. Outer plate; 50. Upper heating furnace; 51. Upper furnace body; 511. Second assembly groove; 52. Second thermal insulation member; 521. Upper furnace cavity; 522. Second mounting port; 53. Second heating lamp tube; 54. Vacuum measuring port; 60. Vacuum measuring instrument; 70. Temperature measuring member; 71. Temperature measuring head; 72. Mounting block; 80. Press plate; 101. Water cooling channel; 102. Sealing ring; 200. COB product.

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] See also Figure 1 and Figure 2 The utility model proposes a welding device 100, including a frame 10, a carrier 30, a main body and a negative pressure mechanism, wherein the carrier 30 is provided with an opening 31, at least part of the edge of the opening 31 is used to support the COB product 200, the main body is installed on the frame 10, the main body includes a lower heating furnace 20, a heat transfer element 40 and an upper heating furnace 50, one of the lower heating furnace 20 and the upper heating furnace is provided with a docking hole, the heat transfer element 40 is installed on the top surface of the lower heating furnace 20, the heat transfer element 40 can pass through the opening 31 to contact the COB product 200, the upper heating furnace 50 and the lower heating furnace 20 can be far away from or close to each other, the upper heating furnace 50 and the lower heating furnace 20 are used to clamp the carrier 30, and form a closed space between the upper heating furnace 50 and the lower heating furnace 20, and the docking hole is connected to the closed space; the negative pressure mechanism is connected to the docking hole 24, and the negative pressure mechanism is used to create negative pressure in the closed space.

[0035] The specific structure of the frame 10 is various. In some embodiments of the present invention, the frame 10 includes a gantry 11, a sliding beam 12 and a driving member 13. The two ends of the sliding beam 12 are slidably connected to the two columns of the gantry 11. The driving member 13 is installed on the top beam of the gantry 11. The output end of the driving member 13 is connected to the upper heating furnace 50, and can drive the upper heating furnace 50 to move up and down to cooperate with the lower heating furnace 20 to clamp the carrier 30. Here, the driving member 13 can be a motor or a cylinder. The specific structure of the frame 10 is set according to the actual application and is not limited here.

[0036] In the above scheme, the docking hole 24 can be opened by the lower heating furnace 20, and the docking hole 24 can also be set by the upper heating furnace 50. The specific opening position of the docking hole 24 can be the peripheral side of the lower heating furnace 20 or the upper heating furnace 50, or the side opposite to each other of the two heating furnaces, which is not limited here.

[0037] The opening 31 of the carrier 30 can not only be used for the heat transfer element 40 to pass through and contact the COB product 200, but also for the gas flow on the upper and lower sides of the carrier 30. The upper heating furnace 50 and the lower heating furnace 20 can be heated by electromagnetic induction heating, electric heating, thermal radiation, etc. Preferably, in some embodiments of the utility model, the upper heating furnace 50 and the lower heating furnace 20 are provided with heating lamps, which heat the heat transfer element 40 by irradiating the heat transfer element 40 and transfer the heat to the COB product 200. This can not only avoid the electromagnetic influence on the COB product 200 in the electromagnetic induction heating and electric heating methods, but also avoid the problem of reduced air heat conduction capacity caused by reduced air density when the enclosed space is in a low pressure state. Compared with other heating methods, thermal radiation is more suitable for low pressure environments.

[0038] The enclosed space has a sealing requirement to prevent the inflow of external gas from affecting the vacuum degree and to prevent heat loss. In some embodiments of the present invention, the bottom surface of the upper furnace body 51 and the top surface of the lower furnace body 25 are both provided with a sealing ring 102. The sealing ring 102 is generally made of a high temperature resistant material to adapt to long-term operation in a high temperature environment without deterioration, such as polyimide, silicone rubber, etc.

[0039] The material of the heat transfer element 40 is generally a metal material, such as copper, aluminum, iron and alloy materials, which has a high thermal conductivity and is set according to specific circumstances and is not limited here.

[0040] The negative pressure mechanism can reduce the pressure in the enclosed space to form a certain vacuum degree. The negative pressure mechanism generally adopts a vacuum generator, and a vacuum pump can also be used to generate sufficient negative pressure.

[0041] When the welding device 100 of the present invention welds the COB product 200, it is placed on the carrier 30, and the carrier 30 is clamped by the upper heating furnace 50 and the lower heating furnace 20 to form a closed space inside and heat it. The heat is guided to the COB product 200 through the heat transfer component 40 to melt the solid solder paste on its surface into liquid tin water. At this time, a negative pressure is created in the closed space by the negative pressure mechanism, so that the bubbles generated by the flux in the molten tin are discharged due to the pressure difference. Finally, the tin solder is solidified to complete the welding. The welding device 100 of the present invention can greatly reduce the void rate of the welding area, thereby improving the quality of the COB product 200.

[0042] In some embodiments of the utility model, a lower furnace chamber 22 is provided in the lower heating furnace 20, a first vent hole 21 and a first mounting port 23 are provided on the top wall of the lower furnace chamber 22, a heat transfer member 40 is installed at the first mounting port 23, and a docking hole 24 is provided on the cavity wall of the lower furnace chamber 22. The lower furnace chamber 22 can be used for installing the heating source component, and the exhaust air duct formed between the first vent hole 21 and the docking hole 24 does not affect the arrangement of components in the lower heating furnace 20 and its normal operation.

[0043] The above-mentioned docking hole 24 can be set on the bottom wall of the lower furnace cavity 22, and can also be set on the side wall of the lower furnace cavity 22. The first ventilation hole 21 can be set to one or more. Multiple first ventilation holes 21 can be arranged around the first mounting port 23, or can be set on opposite sides of the first mounting port 23. It can be set according to actual needs and is not limited here.

[0044] In some embodiments of the present invention, the lower heating furnace 20 includes a lower furnace body 25, a first heat insulating member 26 and a first heating lamp 27. The lower furnace body 25 is provided with a first assembly groove 251 in a direction away from the upper heating furnace 50. The first heat insulating member 26 is nested in the first assembly groove 251. A lower furnace cavity 22 is provided in the first heat insulating member 26. Both ends of the first heating lamp 27 are installed on the two side walls of the lower furnace cavity 22 in the horizontal direction. The heat insulating member can be made of glass fiber, ceramic fiber, aluminum silicate fiber, etc., with low thermal conductivity, high temperature resistance and corrosion resistance. Generally, the top periphery of the heat insulating member is connected to the lower furnace body 25, and a certain gap is set between the side and bottom of the heat insulating member and the first assembly groove 251 to avoid direct heat conduction between the heat insulating member and the lower furnace body 25.

[0045] Through the above scheme, the first thermal insulation member 26 can reduce the thermal conductivity coefficient and slow down the loss of heat from the lower furnace chamber 22, thereby maintaining the temperature in the lower furnace chamber 22 stable, thereby ensuring the welding quality, and significantly reducing energy consumption and reducing the welding process cost. In addition, the first thermal insulation member 26 can prevent heat from being conducted to the outer lower furnace body 25, preventing the lower furnace body 25 from having an excessively high temperature and causing safety hazards.

[0046] In order to improve the heat radiation efficiency, in some embodiments of the present invention, the side of the heat transfer element 40 facing the heating lamp is coated with a dark coating. In other embodiments of the present invention, the side of the heat transfer element 40 facing the heating lamp is roughened.

[0047] Furthermore, in some embodiments of the present invention, the welding device 100 further includes a control module and a temperature measuring element 70, the temperature measuring element 70 is connected to the heat transfer element 40, the control module is electrically connected to the temperature measuring element 70 and the first heating lamp 27, and the control module is used to receive the temperature signal of the temperature measuring element 70 and control the heating power of the first heating lamp 27. In this way, the temperature in the enclosed space can be controlled at the target temperature, avoiding welding cracks, material deformation, material oxidation, incomplete fusion and other problems caused by excessively high or low temperature, and further ensuring the welding effect.

[0048] The temperature measuring element 70 may measure temperature by a thermistor or a thermocouple, and the control module may be a single chip microcomputer or a PWM controller, etc., which may be configured according to specific circumstances and is not limited here.

[0049] Furthermore, in some embodiments of the present invention, the welding device 100 further includes a vacuum degree measuring instrument 60, which is electrically connected to the control module, and is used to detect the vacuum degree in the enclosed space and send a detection signal to the control module. In this way, the vacuum degree in the enclosed space can be measured by the vacuum degree measuring instrument 60, and the power of the negative pressure mechanism can be controlled by the control module, so that the actual vacuum degree in the enclosed space tends to the target vacuum degree, thereby ensuring that the welding effect can reach the expected level.

[0050] In some embodiments of the present invention, a vacuum degree measuring port 54 is provided in the upper heating furnace 50 or the lower heating furnace 20, and the vacuum degree measuring port 54 is used to install the measuring end of the vacuum degree measuring instrument 60, so that the measuring end can be connected to the enclosed space through the vacuum degree measuring port 54. The vacuum degree measuring port 54 can be on the peripheral side of the upper heating furnace 50 or the lower heating furnace 20 or on the side opposite to the upper heating furnace 50 or the lower heating furnace 20, as long as it does not affect the normal operation of other components, and is not limited here.

[0051] Considering that there is a certain degree of vacuum in the enclosed space, it is difficult to ensure the accuracy of the measurement result obtained by the temperature measuring element 70 by measuring the temperature in the enclosed space. Therefore, in some embodiments of the present invention, the temperature measuring element 70 includes a temperature measuring head 71 and a mounting block 72. The mounting block 72 is mounted on the inner side of the heat transfer element 40. The mounting block 72 is provided with a plug hole. The inner side of the heat transfer element 40 is provided with a temperature measuring hole 411. The temperature measuring head 71 passes through the plug hole and is assembled in the temperature measuring hole 411. In this way, the temperature measuring head 71 directly measures the temperature of the heat transfer plate with high accuracy. In addition, the temperature measuring head 71 is fixed to the heat transfer plate by the mounting block 72, which has good stability.

[0052] In some embodiments of the present invention, the heat transfer element 40 includes an inner plate body 41 and an outer plate body 42 which are stacked, the inner plate body 41 is provided with a temperature measuring hole 411, and the outer plate body 42 is used to support the COB product 200. In this way, the outer plate body 42 can be replaced with the model of the COB product 200, and has higher adaptability. There are various ways to connect the inner plate body 41 and the outer plate body 42, and the two can be fixed by screw connectors. In some embodiments of the present invention, a positioning column is provided on the top surface of the inner plate body 41, and a positioning hole is provided on the outer plate body 42. The outer plate body 42 is placed above the inner plate body 41, and the positioning column cooperates with the positioning hole to limit the movement of the outer plate body 42.

[0053] In some embodiments of the utility model, the upper heating furnace 50 includes an upper furnace body 51, a second thermal insulation member 52, a second heating lamp tube 53 and a pressing plate 80, and a second assembly groove 511 is opened on the bottom surface of the upper furnace body 51; the second thermal insulation member 52 is nested in the second assembly groove 511, and an upper furnace cavity 521 is arranged in the second thermal insulation member 52, and a second installation port 522 is opened on the bottom wall of the upper furnace cavity 521; both ends of the second heating lamp tube 53 are installed on the two side cavity walls of the upper furnace cavity 521 in the horizontal direction, and the second heating lamp tube 53 is electrically connected to the control module; the pressing plate 80 is installed at the second installation port 522, and the pressing plate 80 is used to press the COB product 200.

[0054] In the above scheme, the structure and function of the upper furnace body 51, the second heat insulating member 52, and the second heating lamp 53 in the upper heating furnace 50 are similar to those of the lower heating furnace 20. The first heating lamp 27 and the second heating lamp 53 heat the COB product 200 from the upper and lower sides respectively, so that the welding efficiency is higher. The above-mentioned pressing plate 80 and the heat transfer member 40 are pressed against the upper and lower sides of the COB product 200 during welding, so that the two parts of the COB product 200 that need to be welded are fixed to ensure the welding quality.

[0055] In some embodiments of the present invention, the pressing plate 80 is detachably connected to the second mounting port 522. In this way, the pressing plate 80 can be replaced with the model of the COB product 200 like the outer plate body 42, and has high adaptability. The specific way in which the pressing plate 80 can be detachably connected to the second mounting port 522 can be screw fixing, clamping, magnetic fixing, etc., which is not limited here.

[0056] Furthermore, in order to prevent the upper furnace body 51 and the lower furnace body 25 from being overheated, in some embodiments of the present invention, a water cooling channel 101 is provided in both the upper furnace body 51 and the lower furnace body 25. Cooling liquid is introduced into the water cooling channel 101 to keep the upper furnace body 51 and the lower furnace body 25 at a low temperature, which is safer.

[0057] In some embodiments of the present invention, a plurality of first vent holes 21 are provided, and the plurality of first vent holes 21 are distributed on both sides of the width direction of the first mounting opening 23, and are arranged at intervals along the length direction of the first mounting opening 23. In this way, when the enclosed space is evacuated or air is introduced, the airflow can flow evenly from the plurality of first vent holes 21 around the COB product 200, and the airflow can be prevented from affecting the solder paste forming.

[0058] Considering that the opening 31 is partially covered by the COB product 200, the air flow cross-section is small, which affects the air extraction efficiency of the negative pressure mechanism. Therefore, in some embodiments of the utility model, the carrier 30 is provided with a second vent hole 32, and one or more second vent holes 32 can be provided. Preferably, in other embodiments of the utility model, the carrier 30 is provided with a plurality of second vent holes 32, and the plurality of second vent holes 32 are distributed on both sides of the width direction of the opening 31, and are arranged at intervals along the length direction of the opening 31. In this way, the overall air flow cross-section of the carrier 30 is larger, and the arrangement position of the second vent hole 32 is opposite to the first vent hole 21, which can avoid the problem that the gas flow is prone to turbulence when the two holes are misaligned, thereby causing the carrier and the heat transfer component to vibrate.

[0059] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A welding device, characterized in that: include: frame; A carrier, wherein the carrier is provided with an opening, and at least a portion of the edge of the opening is used to support the COB product; A main body, the main body is installed on the frame, the main body includes a lower heating furnace, a heat transfer element and an upper heating furnace, one of the lower heating furnace and the upper heating furnace is provided with a docking hole, the heat transfer element is installed on the top surface of the lower heating furnace, the heat transfer element can pass through the opening to contact the COB product, the upper heating furnace and the lower heating furnace can be far away from or close to each other, the upper heating furnace and the lower heating furnace are used to clamp the carrier, and form a closed space between the upper heating furnace and the lower heating furnace, and the docking hole is connected to the closed space; as well as A negative pressure mechanism is connected to the docking hole and is used to create negative pressure in the enclosed space.

2. The welding device according to claim 1, characterized in that A lower furnace cavity is provided in the lower heating furnace, a first vent hole and a first mounting opening are provided on the top wall of the lower furnace cavity, the heat transfer element is installed at the first mounting opening, and the cavity wall of the lower furnace cavity is provided with the docking hole.

3. The welding device according to claim 2, characterized in that: The lower heating furnace includes a lower furnace body, a first thermal insulation member and a first heating lamp tube. The lower furnace body is recessed with a first assembly groove in a direction away from the upper heating furnace. The first thermal insulation member is nested in the first assembly groove. The lower furnace cavity is arranged in the first thermal insulation member. Both ends of the first heating lamp tube are installed on the two side walls of the lower furnace cavity in the horizontal direction.

4. The welding device according to claim 3, characterized in that The welding device also includes a control module and a temperature measuring component, the temperature measuring component is connected to the heat transfer component, the control module is electrically connected to the temperature measuring component and the first heating lamp, and the control module is used to receive the temperature signal of the temperature measuring component and control the heating power of the first heating lamp.

5. The welding device according to claim 4, characterized in that The welding device further comprises a vacuum degree measuring instrument, which is electrically connected to the control module and is used to detect the vacuum degree in the enclosed space and send a detection signal to the control module.

6. The welding device according to claim 4, characterized in that: The temperature measuring component includes a temperature measuring head and a mounting block. The mounting block is mounted on the inner side of the heat transfer component. The mounting block is provided with a plug hole. The inner side of the heat transfer component is provided with a temperature measuring hole. The temperature measuring head passes through the plug hole and is assembled in the temperature measuring hole.

7. The welding device according to claim 6, characterized in that The heat transfer element comprises an inner plate body and an outer plate body which are stacked, the inner plate body is provided with the temperature measuring hole, and the outer plate body is used for supporting the COB product.

8. The welding device according to claim 4, characterized in that: The upper heating furnace comprises an upper furnace body, a second heat insulating member, a second heating lamp tube and a pressing plate, and a second assembly groove is provided on the bottom surface of the upper furnace body; The second heat insulating member is nested in the second assembly groove, an upper furnace cavity is arranged in the second heat insulating member, and a second installation opening is opened on the bottom wall of the upper furnace cavity; The two ends of the second heating lamp are installed on the two side walls of the upper furnace cavity in the horizontal direction, and the second heating lamp is electrically connected to the control module; The pressing plate is installed at the second installation opening, and the pressing plate is used to press the COB product.

9. The welding device according to claim 8, characterized in that The upper furnace body and the lower furnace body are both provided with water cooling channels; and / or, The bottom surface of the upper furnace body and the top surface of the lower furnace body are both provided with sealing rings.

10. The welding device according to claim 2, characterized in that: The first vent holes are provided in plurality, and the plurality of the first vent holes are distributed on both sides of the first mounting opening in a width direction and are arranged at intervals along a length direction of the first mounting opening; and / or, The carrier is provided with a second vent hole.

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