Reflow soldering furnace with integrated welding hearth

Abstract

The utility model relates to a reflow soldering furnace with an integrated welding hearth, the welding hearth of the reflow soldering furnace comprises a hearth welding assembly and a motor assembly, and the hearth welding assembly comprises an upper hearth welding assembly and a lower hearth welding assembly which are connected through welding. A heating module and a cooling module are arranged between the upper hearth welding assembly and the lower hearth welding assembly; the motor assembly comprises a motor and a separator, a through hole is formed in the separator, and a motor shaft of the motor penetrates through the through hole to enter the hearth welding assembly. Compared with the prior art, the hearth welding assemblies are of an integrated structure, the upper hearth welding assembly and the lower hearth welding assembly are connected in a welded mode, cleanliness is easier to maintain, heat conduction efficiency is higher, the heat preservation effect is better, and power consumption of equipment under the same working condition is lower; and the heat-insulating cotton and parts which are easy to generate dust or stains are arranged outside the hearth welding assembly, so that the cleanliness in the hearth is not influenced, and the like.

Description

Technical Field

[0001] The utility model relates to a welding process, in particular to a reflow soldering furnace with an integrated welding furnace chamber. Background Art

[0002] Reflow soldering technology is not unfamiliar in the field of electronic manufacturing. It is one of the three main processes in the SMT mounting process. Reflow soldering is mainly used to solder PCB circuit boards with components mounted. Various electrical components are combined with PCB boards through the melting and solidification of solder paste. In this process, nitrogen is widely used in the reflow soldering environment. Its main function is to protect the soldered parts and solder paste from oxidation and pollution. Nitrogen can effectively protect the welding environment from oxidation and pollution. The flow rate of nitrogen is an important parameter of reflow soldering, which affects the quality and effect of welding. During the reflow soldering process, the flow rate of nitrogen needs to be adjusted according to the actual welding situation to ensure the quality and effect of welding. The flow rate of nitrogen will affect the speed of welding and the stability of the welding environment. Too much flow will consume excessive nitrogen, and too little flow will not play a protective role. Therefore, reflow soldering furnace equipment with good sealing performance can better control the flow rate of nitrogen to maintain normal welding quality and effect, while also reducing the use of nitrogen and reducing production costs.

[0003] In addition, as the SMT and semiconductor industries have higher and higher levels of integrated circuit integration, the cleanliness level requirements for components are also getting higher and higher, especially for some micro-manufactured wafers and chips, the cleanliness will reach ISO3 or 4 level requirements. Therefore, there are higher requirements for the cleanliness of production equipment. The equipment needs to maintain cleanliness during long-term operation and production, and dust, debris and stains are not allowed.

[0004] After searching, the authorization announcement number CN219484469U discloses a 5 micron self-purification temperature control heating module suitable for an ultra-clean reflow soldering furnace, which specifically discloses: the module includes a blower motor, an outer shell, an inner shell and a HEPA filter assembly, the top of the outer shell is provided with two sets of blower motors, the inner shell is provided with a HEPA filter assembly; the bottom of the inner shell is provided with a clean gas air distribution plate; the top of the clean gas air distribution plate (8) is provided with a HEPA filter assembly. However, the prior art mainly controls the cleanliness of the gas in the furnace through the HEPA filter assembly, and the overall structure is relatively complex.

[0005] Therefore, how to design a reflow oven with good sealing, high cleanliness and simple structure is a technical problem that needs to be solved. Utility Model Content

[0006] The purpose of the utility model is to provide a reflow soldering furnace with an integrated soldering furnace chamber in order to overcome the defects of poor sealing, low cleanliness and complex structure in the above-mentioned prior art.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] According to one aspect of the utility model, a reflow soldering furnace with an integrated welding furnace chamber is provided, the welding furnace chamber of the reflow soldering furnace comprises a furnace chamber welding assembly and a motor assembly, the furnace chamber welding assembly comprises an upper furnace chamber welding assembly and a lower furnace chamber welding assembly connected by welding, a heating module and a cooling module are provided between the upper furnace chamber welding assembly and the lower furnace chamber welding assembly; the motor assembly comprises a motor and an isolating member, the isolating member is provided with a through hole, and a motor shaft of the motor passes through the through hole to the interior of the furnace chamber welding assembly.

[0009] As a preferred technical solution, the reflow oven also includes a motor gasket, a shock-absorbing sheet metal and a motor gypsum gasket. The motor gasket is installed on the shock-absorbing sheet metal. The shock-absorbing sheet metal is installed between the motor assembly and the upper furnace welding assembly to fix the motor assembly; the motor gypsum gasket is installed between the shock-absorbing sheet metal and the upper furnace welding assembly.

[0010] As a preferred technical solution, the upper furnace welding assembly includes a base plate, a motor mounting assembly, insulation cotton fixing studs, a partition plate and a side wall. The motor mounting assembly and the insulation cotton fixing studs are installed on one side of the base plate, and the partition plate is installed on the other side. The side walls are installed on both sides of the base plate.

[0011] As a preferred technical solution, a motor mounting assembly is installed in the middle of one side of the base plate, and insulation cotton fixing studs are installed on both sides; the upper furnace welding assembly also includes a first support, a second support and reinforcing ribs installed on both sides of the side walls.

[0012] As a preferred technical solution, the furnace welding assembly, heating module and cooling module are all made of metal.

[0013] As a preferred technical solution, the gap between the motor shaft and the through hole is 2% to 10% of the diameter of the motor shaft.

[0014] As a preferred technical solution, a heat-insulating layer is provided on the outer side of the furnace welding assembly.

[0015] As a preferred technical solution, the insulation layer includes an upper furnace insulation layer close to the upper furnace welding assembly and a lower furnace insulation layer close to the lower furnace welding assembly; the upper furnace insulation layer is provided with a groove for installing the motor assembly.

[0016] As a preferred technical solution, the upper furnace welding assembly and the lower furnace welding assembly are made of aluminum-clad steel.

[0017] As a preferred technical solution, the isolation piece is cylindrical.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1) The furnace welding assembly of the utility model is an integrated structure, in which the upper furnace welding assembly and the lower furnace welding assembly are connected by welding, and the sealing performance of the welding is better and more reliable. The sealing performance of the equipment is not affected after long-term use, and the cleanliness is easier to maintain;

[0020] 2) The integrated furnace welding assembly of the utility model has higher heat conduction efficiency, and the gap between the inside and outside of the furnace is smaller, so the heat preservation effect is better, and the power consumption of the equipment under the same working conditions is lower;

[0021] 3) The furnace welding assembly and internal components of the utility model are all made of metal, which can meet higher cleanliness requirements; the insulation cotton and parts that are prone to generate dust or stains are installed on the outside of the furnace welding assembly. When the equipment is operated in a long-term high-temperature environment, powder and stains will not fall off inside, and the cleanliness of the furnace will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded view of a reflow soldering furnace with an integrated soldering furnace chamber according to the utility model;

[0023] Figure 2 It is a structural schematic diagram of one side of the upper furnace welding assembly of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the other side of the upper furnace welding assembly of the utility model;

[0025] The numbers in the figure show:

[0026] 10. Upper furnace welding assembly, 100. Bottom plate, 101. Motor mounting assembly, 102. Insulation cotton fixing studs, 103. Partition plate, 104. Side wall, 105. First support, 106. Second support, 107. Reinforcement ribs, 11. Lower furnace welding assembly, 2. Motor assembly, 20. Isolation piece, 200. Through hole, 210. Motor shaft, 3. Heating module, 4. Cooling module, 5. Motor gasket, 6. Shock-absorbing sheet metal, 7. Motor gypsum gasket, 80. Upper furnace insulation layer, 800. Groove, 81. Lower furnace insulation layer. DETAILED DESCRIPTION

[0027] 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 part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] like Figure 1 As shown, the utility model provides a reflow soldering furnace with an integrated welding furnace, including a furnace welding assembly, a motor assembly 2, a heating module 3, a cooling module 4, a motor gasket 5, a shock-absorbing sheet metal 6 and a motor gypsum gasket 7.

[0029] The furnace welding assembly includes an upper furnace welding assembly 10 and a lower furnace welding assembly 11. The upper furnace welding assembly 10 and the lower furnace welding assembly 11 are made of aluminum-clad steel and are welded into a furnace welding assembly. The heating module 3 and the cooling module 4 are installed in the furnace welding assembly. There are 11 heating modules 3 and 2 cooling modules 4, which are installed along the extension direction of the furnace welding assembly. The entire furnace welding assembly is sealed by welding, and the sealing is good. Only a small amount of sealant can be used in some low-temperature areas.

[0030] like Figure 2 and 3 As shown, the upper furnace welding assembly 10 includes a bottom plate 100, a motor mounting assembly 101, a heat preservation cotton fixing stud 102, a partition plate 103, a side wall 104, a first support 105, a second support 106 and a reinforcing rib 107. The motor mounting assembly 101 and the heat preservation cotton fixing stud 102 are installed on the side of the bottom plate 100 facing the shock-absorbing sheet metal 6. The motor mounting assembly 101 is installed in the middle of the bottom plate 100, and a row of heat preservation cotton fixing studs 102 are installed along both sides of the bottom plate 100; a plurality of partition plates 103 are installed perpendicular to the extension direction of the bottom plate 100 on the side of the bottom plate 100 facing the lower furnace welding assembly 11; side walls 104 are installed on both sides of the extension direction of the bottom plate 100, a second support 106 is installed in the middle of the side wall 104, and the second support 106 and the reinforcing rib 107 are symmetrically installed on both sides. The furnace welding assembly, heating module 3 and cooling module 4 are all made of metal, which can meet higher cleanliness requirements.

[0031] An insulation layer is provided outside the furnace welding assembly, including an upper furnace insulation layer 80 close to the upper furnace welding assembly 10 and a lower furnace insulation layer 81 close to the lower furnace welding assembly 11. The upper furnace insulation layer 80 is provided with a groove 800 for installing the motor assembly 2. The insulation layer is installed outside the furnace and is completely isolated from the inside of the furnace welding assembly. During the long-term operation of the equipment, the aging of the insulation layer will not affect the cleanliness of the inside of the furnace welding assembly.

[0032] The motor assembly 2 includes a motor and an isolation member 20. The isolation member 20 is cylindrical and is provided with a through hole 200. The motor shaft 210 of the motor passes through the through hole 200 on the isolation member 20 and extends deep into the furnace welding assembly. The gap between the motor shaft 210 and the through hole 200 is 2% to 10% of the diameter of the motor shaft. For the inside and outside of the furnace welding assembly, except for the inlet and outlet of the product, the assembly gaps between other parts are very small. The design isolates the inside and outside of the furnace, which can ensure that external gases and debris will not be brought into the furnace when the motor is running.

[0033] The motor gasket 5 is installed on the shock-absorbing sheet metal 6, and the shock-absorbing sheet metal 6 is installed between the motor assembly 2 and the upper furnace welding assembly 10. The motor gasket and the shock-absorbing sheet metal 6 fix the motor groups together, which can greatly reduce the vibration of the motor; the motor gypsum gasket 7 is installed between the shock-absorbing sheet metal 6 and the upper furnace welding assembly 10.

[0034] The welding structure of the furnace welding assembly of the utility model is compact and simple, and compared with the existing furnace structure, fewer parts need to be installed and fixed with fasteners, saving costs in the assembly process; the welding structure has higher heat conduction efficiency, the gap between the inside and outside of the furnace welding assembly is smaller, the insulation effect is better, and the power consumption of the equipment under the same working conditions is lower; the welding sealing performance is better and more reliable, and the sealing performance of the equipment is not affected after long-term use. The interior of the furnace welding assembly is basically made of metal parts, which can meet higher cleanliness requirements; the insulation cotton and parts that are prone to dust or stains are installed on the outside of the furnace welding assembly. When the equipment is operated in a long-term high-temperature environment, powder and stains will not fall from the inside, and the cleanliness of the furnace welding assembly will not be affected.

[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A reflow oven with an integrated soldering furnace, characterized in that: The welding furnace of the reflow oven comprises a furnace welding assembly and a motor assembly (2), wherein the furnace welding assembly comprises an upper furnace welding assembly (10) and a lower furnace welding assembly (11) connected by welding, and a heating module (3) and a cooling module (4) are arranged between the upper furnace welding assembly (10) and the lower furnace welding assembly (11); the motor assembly (2) comprises a motor and an isolating member (20), wherein a through hole (200) is arranged on the isolating member (20), and a motor shaft (210) of the motor passes through the through hole (200) to the interior of the furnace welding assembly.

2. The reflow oven with an integrated soldering furnace according to claim 1, characterized in that: The reflow oven also includes a motor gasket (5), a shock-absorbing sheet metal (6) and a motor gypsum gasket (7), wherein the motor gasket (5) is installed on the shock-absorbing sheet metal (6), and the shock-absorbing sheet metal (6) is installed between the motor assembly (2) and the upper furnace welding assembly (10) for fixing the motor assembly (2); the motor gypsum gasket (7) is installed between the shock-absorbing sheet metal (6) and the upper furnace welding assembly (10).

3. The reflow oven with an integrated soldering furnace according to claim 1, characterized in that: The upper furnace welding assembly (10) comprises a base plate (100), a motor mounting assembly (101), thermal insulation cotton fixing studs (102), a partition plate (103) and a side wall (104); the motor mounting assembly (101) and the thermal insulation cotton fixing studs (102) are mounted on one side of the base plate (100), and the partition plate (103) is mounted on the other side; and the side walls (104) are mounted on both sides of the base plate (100).

4. The reflow oven with an integrated soldering furnace chamber according to claim 3, characterized in that: A motor mounting assembly (101) is installed in the middle of one side of the base plate (100), and thermal insulation cotton fixing studs (102) are installed on both sides; the upper furnace welding assembly (10) also includes a first support (105), a second support (106) and reinforcing ribs (107) installed on both sides of the side wall (104).

5. The reflow oven with an integrated soldering furnace chamber according to claim 3, characterized in that: The furnace welding assembly, the heating module (3) and the cooling module (4) are all made of metal.

6. The reflow oven with an integrated soldering furnace according to claim 1, characterized in that: The gap between the motor shaft (210) and the through hole (200) is 2% to 10% of the diameter of the motor shaft.

7. The reflow oven with an integrated soldering furnace according to claim 1, characterized in that: A heat-insulating layer is arranged on the outer side of the furnace welding assembly.

8. The reflow oven with an integrated soldering furnace chamber according to claim 7, characterized in that: The insulation layer comprises an upper furnace insulation layer (80) close to the upper furnace welding assembly (10) and a lower furnace insulation layer (81) close to the lower furnace welding assembly (11); a groove (800) for installing the motor assembly (2) is provided on the upper furnace insulation layer (80).

9. The reflow oven with an integrated soldering furnace according to claim 1, characterized in that: The upper furnace welding assembly (10) and the lower furnace welding assembly (11) are made of aluminum-clad steel.

10. The reflow oven with an integrated soldering furnace according to claim 1, characterized in that: The isolating member (20) is cylindrical.

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