Nitrogen control system for reflow soldering furnace

Abstract

The utility model relates to the technical field of reflow soldering furnaces, and discloses a nitrogen control system for a reflow soldering furnace, which comprises a reflow soldering furnace shell, a box cover II is arranged at the top of the reflow soldering furnace shell, a controller is arranged on one side of the reflow soldering furnace shell, a circuit box cover is arranged on the front surface of the reflow soldering furnace shell, and the circuit box cover II is arranged on the back surface of the reflow soldering furnace shell. The reflow soldering furnace comprises a reflow soldering furnace shell, a control fixing assembly is arranged in the reflow soldering furnace shell, the control fixing assembly comprises a conveying part arranged in the reflow soldering furnace shell, a fixing part is arranged on the conveying part, a control part is arranged in the reflow soldering furnace shell, and when nitrogen in the reflow soldering furnace shell is too high, the fixing part is fixed on the conveying part. The micro air cylinder outside the reflow soldering furnace shell abuts inwards so as to block the inner sliding rod, when the nitrogen is too low, the nitrogen is continuously conveyed inwards, the nitrogen is sprayed out of the air outlet to push the plug so as to drive the inner sliding rod to slide into the hollow cylinder, and then the content of the nitrogen in the reflow soldering furnace shell can be conveniently controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of reflow soldering furnaces, in particular to a nitrogen control system for a reflow soldering furnace. Background Art

[0002] The reflow soldering process is to re-melt the paste solder pre-distributed on the printed circuit board pads to achieve the mechanical and electrical connection between the solder ends or pins of the surface mounted components and the printed circuit board pads. The reflow soldering oven is the last key process of SMT (surface mount technology). It is a real-time process control. Its process changes are relatively complex and involve many process parameters. Among them, the setting of the temperature curve is the most important and directly determines the quality of reflow soldering.

[0003] When nitrogen is passed into the reflow box of the existing reflow oven, it is passed at a uniform speed, and the flow rate cannot be adjusted according to the concentration in the box. In addition, the nitrogen inlet pipe cannot be replaced and adjusted according to the inlet pipes of different thicknesses and lacks fixation. Therefore, improvements are made to the above-mentioned problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a nitrogen control system for a reflow soldering furnace. The utility model has the advantages that a concentration detector of model HV-98 is installed on the inner wall of the shell of the reflow soldering furnace to detect the nitrogen content in the shell of the reflow soldering furnace. When the nitrogen in the shell of the reflow soldering furnace is too high, the micro cylinder outside the shell of the reflow soldering furnace abuts inward, thereby blocking the inner slide bar. When the nitrogen is too low, the nitrogen is continuously transported inward, and the nitrogen is ejected from the gas outlet to push the plug, thereby driving the inner slide bar to slide into the hollow cylinder, thereby facilitating the control of the nitrogen content inside the shell of the reflow soldering furnace.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nitrogen control system for a reflow soldering furnace, comprising a reflow soldering furnace shell, a box cover 2 is arranged on the top of the reflow soldering furnace shell, a controller is arranged on one side of the reflow soldering furnace shell, a circuit box cover is arranged on the front surface of the reflow soldering furnace shell, a control fixing component is arranged inside the reflow soldering furnace shell, the control fixing component comprises a conveying part arranged inside the reflow soldering furnace shell, a fixing part is arranged on the conveying part, a control part is arranged inside the reflow soldering furnace shell, the conveying part comprises a nitrogen tank fixedly installed on the back of the reflow soldering furnace shell, a connecting pipe is fixedly connected to the nitrogen tank, a connecting head is fixedly connected to the extending end of the connecting pipe, and an indicator gauge is connected to the connecting head.

[0008] Preferably, the other end of the connector is fixedly connected to an air outlet, and the other end of the air outlet extends into the outer shell of the reflow oven.

[0009] Preferably, the fixing portion comprises an external bolt threadedly connected to the connecting head, and an extending end of the external bolt is fixedly connected to an internal fixing frame, and a sealing gasket is arranged inside the connecting head.

[0010] Preferably, there are two groups of fixing parts, which are symmetrically installed at the left and right ends of the connecting head respectively. A fixing part is arranged inside the connecting head, so that the internal fixing frame inside the connecting head can be driven by rotating the bolts inside the connecting head to fix the air outlet pipes of different thicknesses, thereby ensuring stability during air outlet.

[0011] Preferably, the control unit includes a concentration detector arranged on one side of the inner wall of the reflow oven shell, and a support column is fixedly installed on one side of the inner wall of the reflow oven shell, a hollow cylinder is fixedly installed on one end of the support column, an inner sliding rod is slidably connected to the inner wall of the hollow cylinder, a plug is fixedly installed on the extended end of the inner sliding rod, one end of the inner sliding rod is fixedly connected to a connecting spring, and the extended end of the connecting spring is fixed on one side of the plug.

[0012] Preferably, a micro-cylinder is fixedly installed on the back of the reflow oven shell, and the extended end of the micro-cylinder passes through the hollow tube. When the nitrogen in the reflow oven shell is too high, the micro-cylinder outside the reflow oven shell abuts inwardly, thereby blocking the inner sliding rod. When the nitrogen is too low, nitrogen is continuously transported inwardly.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a nitrogen control system for a reflow oven, which has the following beneficial effects:

[0015] 1. A nitrogen control system for a reflow oven. A concentration detector, model HV-98, is installed on the inner wall of the reflow oven shell to detect the nitrogen content in the reflow oven shell. When the nitrogen in the reflow oven shell is too high, the micro cylinder outside the reflow oven shell abuts inward, thereby blocking the inner slide bar. When the nitrogen is too low, nitrogen is continuously transported inward, and the nitrogen is ejected from the air outlet to push the plug, thereby driving the inner slide bar to slide into the hollow cylinder, thereby facilitating the control of the internal content of nitrogen in the reflow oven shell.

[0016] 2. A nitrogen control system for a reflow soldering furnace is provided with a conveying part behind the outer shell of the reflow soldering furnace, a connecting pipe is provided on the nitrogen tank, an indicator gauge is provided on the connecting pipe, a connecting head is fixedly connected to the extending end of the connecting pipe, and the connecting head is connected to the air outlet, and a fixing part is provided inside the connecting head, so that the internal fixing frame inside the connecting head is driven by rotating the bolts in the connecting head to fix the air outlet pipes of different thicknesses, thereby ensuring the stability during air outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the back structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the top-sectional structure of the utility model;

[0021] Figure 4 It is a partial structural schematic diagram of the utility model.

[0022] In the figure: 1. Reflow oven housing; 2. Control and fixing assembly; 21. Conveying part; 211. Nitrogen tank; 212. Connecting pipe; 213. Indicator; 214. Connecting head; 215. Air outlet; 22. Fixing part; 221. External bolt; 222. Internal fixing frame; 23. Control part; 231. Concentration detector; 232. Support column; 233. Hollow cylinder; 234. Internal sliding rod; 235. Plug; 236. Connecting spring; 24. Micro cylinder; 3. Box cover 2; 4. Controller; 5. Circuit box cover. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Example 1

[0025] like Figure 1-4As shown, the utility model provides a nitrogen control system for a reflow soldering furnace, comprising a reflow soldering furnace shell 1, a box cover 23 is arranged on the top of the reflow soldering furnace shell 1, a controller 4 is arranged on one side of the reflow soldering furnace shell 1, a circuit box cover 5 is arranged on the front surface of the reflow soldering furnace shell 1, a control fixing component 2 is arranged inside the reflow soldering furnace shell 1, the control fixing component 2 comprises a conveying part 21 arranged inside the reflow soldering furnace shell 1, a fixing part 22 is arranged on the conveying part 21, a control part 23 is arranged inside the reflow soldering furnace shell 1, the conveying part 21 comprises a nitrogen tank 211 fixedly installed on the back of the reflow soldering furnace shell 1, a connecting pipe 212 is fixedly connected to the nitrogen tank 211, a connecting head 214 is fixedly connected to the extending end of the connecting pipe 212, an indicator 213 is connected to the connecting head 214, and an outlet 215 is fixedly connected to the other end of the connecting head 214, and an outlet The other end of the opening 215 extends into the reflow oven shell 1, the control unit 23 includes a concentration detector 231 arranged on one side of the inner wall of the reflow oven shell 1, and a support column 232 is fixedly installed on one side of the inner wall of the reflow oven shell 1, one end of the support column 232 is fixedly installed with a hollow cylinder 233, the inner wall of the hollow cylinder 233 is slidably connected with an inner slide bar 234, an extended end of the inner slide bar 234 is fixedly installed with a plug 235, one end of the inner slide bar 234 is fixedly connected with a connecting spring 236, and the extended end of the connecting spring 236 is fixed on one side of the plug 235, a micro cylinder 24 is fixedly installed on the back of the reflow oven shell 1, and the extended end of the micro cylinder 24 passes through the hollow cylinder 233, when the nitrogen in the reflow oven shell 1 is too high, the micro cylinder 24 outside the reflow oven shell 1 abuts inwardly, thereby blocking the inner slide bar 234, and when the nitrogen is too low, the nitrogen is continuously transported inwardly.

[0026] In this embodiment, the micro cylinder 24 outside the reflow oven shell 1 abuts inward to block the inner slide bar 234. When the nitrogen is too low, nitrogen is continuously transported inward and ejected from the gas outlet 215 to push the plug 235 and drive the inner slide bar 234 to slide into the hollow cylinder 233, thereby facilitating the control of the nitrogen content inside the reflow oven shell 1.

[0027] Example 2

[0028] like Figure 1-4 As shown, on the basis of Example 1, the utility model provides a technical solution: the fixing part 22 includes an outer bolt 221 threadedly connected to the connecting head 214, and the extending end of the outer bolt 221 is fixedly connected to the inner fixing frame 222, and a sealing gasket is arranged inside the connecting head 214. There are two groups of fixing parts 22, and the two groups of fixing parts 22 are symmetrically installed at the left and right ends of the connecting head 214, and the fixing part 22 is arranged inside the connecting head 214, so that the inner fixing frame 222 inside the connecting head 214 is driven by rotating the bolts inside the connecting head 214 to fix the air outlet pipes of different thicknesses, thereby ensuring the stability during air outlet.

[0029] In this embodiment, an indicator gauge 213 is provided on the connecting tube 212, and the extending end of the connecting tube 212 is fixedly connected to a connecting head 214, and the connecting head 214 is connected to an air outlet 215, and a fixing portion 22 is provided inside the connecting head 214, so that the internal fixing frame 222 inside the connecting head 214 is driven by rotating the bolts inside the connecting head 214 to fix the air outlet pipes of different thicknesses, thereby ensuring stability during air outlet.

[0030] The following is a detailed description of the working principle of the nitrogen control system used in the reflow oven.

[0031] like Figure 1-4 As shown, when in use, a control fixing assembly 2 is arranged inside the reflow oven housing 1, and a conveying portion 21 is arranged behind the reflow oven housing 1, a connecting pipe 212 is arranged on the nitrogen tank 211, and an indicator 213 is arranged on the connecting pipe 212, and a connecting head 214 is fixedly connected to the extending end of the connecting pipe 212, and an air outlet 215 is connected to the connecting head 214, and a fixing portion 22 is arranged inside the connecting head 214, so that the internal fixing frame 222 inside the connecting head 214 is driven to fix the air outlet pipes of different thicknesses by rotating the bolts inside the connecting head 214, so as to ensure the stability during the air outlet, and a sealing portion 22 is arranged inside the connecting pipe 212. The sealing gasket can also be quickly replaced according to the different thicknesses of the air outlet pipe, and a control unit 23 is arranged inside the reflow oven shell 1, and a concentration detector 231 of model HV-98 is installed on the inner wall of the reflow oven shell 1 to detect the nitrogen content in the reflow oven shell 1. When the nitrogen in the reflow oven shell 1 is too high, the micro cylinder 24 outside the reflow oven shell 1 abuts inwardly, thereby blocking the inner slide bar 234. When the nitrogen is too low, nitrogen is continuously transported inwardly, and the nitrogen is ejected from the air outlet 215 to push the plug 235, thereby driving the inner slide bar 234 to slide into the hollow cylinder 233, thereby facilitating the control of the nitrogen content inside the reflow oven shell 1.

Claims

1. A nitrogen control system for a reflow soldering furnace, comprising a reflow soldering furnace shell (1), a box cover (3) is arranged on the top of the reflow soldering furnace shell (1), a controller (4) is arranged on one side of the reflow soldering furnace shell (1), a circuit box cover (5) is arranged on the front surface of the reflow soldering furnace shell (1), and a control fixing component (2) is arranged inside the reflow soldering furnace shell (1), characterized in that: The control fixing assembly (2) comprises a conveying part (21) arranged inside the reflow oven shell (1), a fixing part (22) being arranged on the conveying part (21), a control part (23) being arranged inside the reflow oven shell (1), the conveying part (21) comprising a nitrogen tank (211) fixedly installed on the back of the reflow oven shell (1), a connecting pipe (212) being fixedly connected to the nitrogen tank (211), a connecting head (214) being fixedly connected to the extending end of the connecting pipe (212), and an indicator gauge (213) being connected to the connecting head (214).

2. A nitrogen control system for a reflow oven according to claim 1, characterized in that: The other end of the connector (214) is fixedly connected to an air outlet (215), and the other end of the air outlet (215) extends into the outer shell (1) of the reflow oven.

3. A nitrogen control system for a reflow oven according to claim 1, characterized in that: The fixing portion (22) comprises an outer bolt (221) threadedly connected to a connecting head (214), and an extending end of the outer bolt (221) is fixedly connected to an inner fixing frame (222), and a sealing gasket is arranged inside the connecting head (214).

4. A nitrogen control system for a reflow oven according to claim 1, characterized in that: The number of the fixing parts (22) is two groups, and the two groups of the fixing parts (22) are symmetrically mounted on the left and right ends of the connecting head (214), respectively.

5. A nitrogen control system for a reflow oven according to claim 1, characterized in that: The control unit (23) includes a concentration detector (231) arranged on one side of the inner wall of the reflow oven shell (1), and a support column (232) is fixedly installed on one side of the inner wall of the reflow oven shell (1), a hollow cylinder (233) is fixedly installed on one end of the support column (232), an inner wall of the hollow cylinder (233) is slidably connected to an inner slide rod (234), a plug (235) is fixedly installed on the extended end of the inner slide rod (234), one end of the inner slide rod (234) is fixedly connected to a connecting spring (236), and the extended end of the connecting spring (236) is fixed on one side of the plug (235).

6. A nitrogen control system for a reflow oven according to claim 1, characterized in that: A micro cylinder (24) is fixedly mounted on the back of the reflow oven housing (1), and an extended end of the micro cylinder (24) passes through the hollow cylinder (233).

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