CN210172748U - Nitrogen reflow soldering equipment - Google Patents
Nitrogen reflow soldering equipment Download PDFInfo
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- CN210172748U CN210172748U CN201920428553.5U CN201920428553U CN210172748U CN 210172748 U CN210172748 U CN 210172748U CN 201920428553 U CN201920428553 U CN 201920428553U CN 210172748 U CN210172748 U CN 210172748U
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Abstract
The utility model discloses a nitrogen reflow soldering device, which comprises at least one hearth, at least one branch gas pipe communicated with the hearth one by one, an oxygen analyzer communicated with the hearth one by one through at least one sampling pipe, and a controller respectively connected with the oxygen analyzer and a branch valve; any branch pipe is provided with a branch valve; the oxygen analyzer sends the monitoring signal to the controller, and the controller judges whether the oxygen content of the corresponding hearth is within a preset range; when the temperature is higher than the maximum value of the preset range, the controller opens the branch valve, and the branch gas pipe introduces nitrogen gas to the corresponding hearth, so that the welding quality is improved; and when the temperature is lower than the minimum value of the preset range, the controller closes the branch valve, stops introducing nitrogen into the corresponding hearth, and prevents excessive use of nitrogen. Therefore, nitrogen can be automatically introduced according to the oxygen content of each hearth as required, the welding environment of each hearth is kept optimal, excessive nitrogen consumption is avoided, the welding quality can be improved, and the welding cost is reduced.
Description
Technical Field
The utility model relates to a reflow soldering technical field, in particular to nitrogen gas reflow soldering equipment.
Background
The furnace body of a nitrogen reflow soldering apparatus is generally provided with several chambers for soldering components. In order to improve the welding quality and reduce the reject ratio of products, a certain amount of nitrogen is usually filled into a plurality of hearths in the welding process to block air from entering the hearths and prevent elements from being oxidized in the hearths, so that the control of the oxygen content of the hearths is very important.
However, the existing nitrogen reflow soldering equipment generally fills nitrogen into a plurality of hearths directly through nitrogen gas conveying pipes. When better welding quality is required, a large amount of nitrogen needs to be filled into the hearth, the nitrogen consumption is increased, and the welding cost is high; when the welding cost is low, a proper amount of nitrogen is filled into the hearth, the oxygen content of the hearth is difficult to ensure, the risk of oxidation of elements is high, and the welding quality is extremely difficult to ensure. Obviously, the existing reflow soldering equipment is difficult to control the oxygen content of the hearth according to needs, and the soldering quality and the soldering cost are difficult to be considered simultaneously.
Therefore, how to reduce the welding cost while ensuring the welding quality is a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a nitrogen gas reflow soldering equipment fills into proper amount nitrogen gas according to furnace's oxygen content is automatic, makes furnace's oxygen content at predetermineeing the within range, has promoted welding quality, has reduced the welding cost.
The specific scheme is as follows:
the utility model provides a nitrogen gas reflow soldering equipment, including at least one furnace, still include:
at least one branch gas pipe communicated with the hearth one by one for conveying nitrogen, wherein any branch gas pipe is provided with a branch valve for controlling the on-off of the corresponding branch gas pipe;
the oxygen analyzer is communicated with the hearth one by one through at least one sampling pipe to detect the oxygen content of the hearth;
and the controller is respectively connected with the oxygen analyzer and the branch valves, and controls the opening and closing of the corresponding branch valves according to signals fed back by the oxygen analyzer so as to enable the oxygen content of all the hearths to be within a preset range.
Preferably, the method further comprises the following steps:
a main gas pipe connected to the at least one branch gas pipe;
the pressure detection piece is connected with the controller and arranged on the main gas pipe to detect the pressure of the main gas pipe;
and when the pressure detection piece detects that the pressure of the main gas pipe is higher than or lower than the preset pressure, the controller starts the alarm according to a signal sent by the pressure detection piece.
Preferably, the method further comprises the following steps:
a main valve connected with the controller and arranged on the main gas pipe;
the flow detection piece is connected with the controller and arranged on the main gas pipe to detect the flow of the main gas pipe; the controller adjusts the opening of the main passage valve according to the signal sent by the flow detection piece so as to adjust the flow of the main air pipe to the preset flow.
Preferably, the method further comprises the following steps:
the flow memory is connected with the controller and used for storing the flow information sent to the controller by the flow detection piece;
and the display is connected with the controller and used for displaying the flow information counted by the flow memory.
Preferably, the method further comprises the following steps:
the pipe joints are connected between the main gas pipe and all the branch gas pipes;
a leakage detection part connected with the controller and arranged on the pipe joint for detecting the leakage amount of the pipe joint; and the controller closes the main path valve according to a signal sent by the leakage detection part when the leakage amount is higher than the preset leakage amount.
Preferably, any hearth is provided with a gas transmission joint connected with the branch gas pipe, and a gas transmission sealing piece is arranged between the gas transmission joint and the branch gas pipe.
Preferably, the oxygen analyzer is provided with a sampling joint connected with any sampling pipe, and a sampling sealing member is arranged between the sampling joint and the sampling pipe.
Preferably, the method further comprises the following steps:
the state detection piece is connected with the controller and is used for respectively detecting the connection state of the sampling tube and the bronchus; and the controller opens the main valve after the sampling pipe is respectively connected with the hearth and the oxygen analyzer according to the signal sent by the state detection part.
Compared with the prior art, any sampling pipe of the utility model conveys sampling gas corresponding to the hearth to the oxygen analyzer so that the oxygen analyzer can analyze the oxygen content of the corresponding hearth, the oxygen analyzer sends the monitored oxygen content data to the controller, and the controller judges whether the current oxygen content of the corresponding hearth is in a preset range;
when the current oxygen content is higher than the maximum value of the preset range, the controller controls the corresponding branch valve to be opened, and the branch gas pipe introduces nitrogen gas into the corresponding hearth so as to reduce the oxygen content and improve the welding quality; when the current oxygen content is lower than the minimum value of the preset range, the controller controls the corresponding branch valve to be closed, and the branch gas pipe stops introducing nitrogen gas into the corresponding hearth, so that excessive use of nitrogen gas is prevented, and the welding cost is reduced.
From this can let in nitrogen gas as required automatically according to every furnace's current oxygen content, make every furnace's oxygen content at predetermineeing the within range to make every furnace's welding environment keep the best, avoid consuming excessive nitrogen gas simultaneously, consequently the utility model provides a nitrogen gas reflow soldering equipment can promote the welding quality, reduces the welding cost simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a partial structural view of a nitrogen reflow soldering apparatus according to an embodiment of the present invention.
The reference numbers are as follows:
the device comprises a branch gas pipe 1, a branch valve 2, a sampling pipe 3, an oxygen analyzer 4, a controller 5, a main gas pipe 6, a pressure detection piece 7, a main valve 8, a flow detection piece 9, a pipe joint 10 and a gas transmission joint 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a partial structural view of a nitrogen reflow soldering apparatus according to an embodiment of the present invention.
The embodiment of the utility model discloses nitrogen gas reflow soldering equipment, including the furnace body, be equipped with at least one furnace that is used for welded element in the furnace body, the concrete structure of furnace body can refer to prior art.
The utility model discloses still include an at least bronchus 1, bronchus 1 set up quantity the same with furnace's quantity, and a bronchus 1 is connected to every furnace, also is that furnace and 1 one-to-one of bronchus are connected, guarantees that every bronchus 1 can carry nitrogen gas to the furnace of being connected with it.
In order to control the on-off of each branch gas pipe 1, each branch gas pipe 1 is provided with a branch valve 2, the branch valve 2 preferably selects an electromagnetic valve, when the electromagnetic valve is electrified, the electromagnetic valve is opened, and the branch valve 2 where the electromagnetic valve is located supplies nitrogen to a hearth; when the electromagnetic valve is powered off, the electromagnetic valve is closed, and the branch valve 2 stops supplying nitrogen to the hearth connected with the electromagnetic valve. Of course, the type of the bypass valve 2 is not limited to the solenoid valve.
In order to adjust the nitrogen flow of each branch gas pipe 1, a throttle valve can be arranged on each branch gas pipe 1, the nitrogen flow is controlled by adjusting the opening of the throttle valve, and then the nitrogen supply speed of the hearth is adjusted according to needs, thereby being beneficial to saving nitrogen and reducing cost.
The utility model discloses still including the oxygen analysis appearance 4 that is used for analyzing the oxygen content, oxygen analysis appearance 4 corresponds with every furnace through an at least sampling pipe 3 and links to each other to monitor every furnace's oxygen content. The number of the sampling pipes 3 is the same as that of the hearths, and accordingly, sampling interfaces for connecting the sampling pipes 3, which are arranged on the oxygen analyzer 4, can be set according to the number of the hearths. Preferably, the number of sampling interfaces arranged on the oxygen analyzer 4 is greater than or equal to the number of the hearths, so that the oxygen analyzer can be used for analyzing furnace bodies with more hearths, and the adaptability of the oxygen analyzer 4 is improved.
For realizing the automatic monitoring function, the utility model discloses still include the controller 5 that links to each other with oxygen analysis appearance 4 and by-pass valve 2 simultaneously, controller 5 is preferred to include computer and PLC, but is not limited to this. The controller 5 can control the corresponding branch valves 2 to be opened and closed according to signals fed back by the oxygen analyzer 4, so that the oxygen content of all the hearths is in a preset range.
Correspondingly, the controller comprises a signal receiving part, a signal judging part and a signal sending part, wherein the structure of each part of the controller is used for the existing sewing automatic control equipment, such as a robot and the like. The key point of the utility model is that the controller combines the oxygen analyzer 4 and the branch valve 2. Specifically, the signal receiving part receives an oxygen content signal sent by the oxygen analyzer 4, the signal judging part compares the current oxygen content carried in the oxygen content signal with a preset oxygen content, and the signal sending part sends a corresponding signal to the branch valve 2 according to a judging structure of the signal judging part so that the branch valve 2 can correspondingly act.
Specifically, when the oxygen analyzer 4 sends the monitored oxygen content data to the controller 5, the controller 5 determines whether the current oxygen content of the corresponding furnace is within a preset range;
when the current oxygen content is higher than the maximum value of the preset range, the oxygen content of the hearth is over high, the controller 5 controls the corresponding branch valve 2 to be opened, and the branch gas pipe 1 feeds nitrogen gas into the corresponding hearth so as to reduce the oxygen content and improve the welding quality; when the current oxygen content is lower than the minimum value of the preset range, the oxygen content of the hearth is low, the controller 5 controls the corresponding branch valve 2 to be closed, and the branch gas pipe 1 stops introducing nitrogen gas into the corresponding hearth, so that excessive use of nitrogen gas is prevented, and the welding cost is reduced.
To sum up, the utility model provides a nitrogen gas reflow soldering equipment can let in nitrogen gas according to every furnace's current oxygen content as required is automatic, makes every furnace's oxygen content at predetermineeing the within range to make every furnace's welding environment keep the best, avoid consuming excessive nitrogen gas simultaneously, consequently the utility model provides a nitrogen gas reflow soldering equipment can promote welding quality, reduces the welding cost simultaneously.
The utility model discloses still include total gas pipe 6, pressure measurement spare 7 and alarm. Wherein, one end of the main gas pipe 6 is connected with all the branch gas pipes 1, the other end is connected with a nitrogen tank filled with nitrogen, and the nitrogen flowing out of the nitrogen tank is conveyed to each branch gas pipe 1 by the main gas pipe 6 according to requirements, so that the nitrogen supply is realized.
The pressure detecting member 7 is connected to the controller 5, and the pressure detecting member 7 is provided on the main air pipe 6 so as to detect the air delivery pressure of the main air pipe 6. The pressure detecting member 7 is preferably a pressure sensor, but is not limited thereto.
The alarm is connected with the controller 5, and when the pressure detection piece 7 detected that the pressure of the main gas pipe 6 is higher than the preset pressure, the controller 5 starts the alarm according to the signal sent by the pressure detection piece 7 to send out an alarm to remind a worker that the pressure of the main gas pipe 6 is too high, and the worker can reduce the gas transmission speed of the nitrogen tank to enable the pressure of the main gas pipe 6 to reach the preset pressure. When pressure detection spare 7 detected the pressure of total trachea 6 and is less than preset pressure, controller 5 still starts alarm device, reminds staff's total trachea 6 pressure to hang down, and staff's accessible restores modes such as leakage opening of total trachea 6 and makes total trachea 6 pressure reach preset pressure.
Of course, when the pressure of the main gas pipe 6 is higher than the preset pressure, the alarm can be driven by a high-voltage signal; when 6 pressures of main gas pipe are lower than preset pressures, the alarm can be driven by the low voltage signals, and the two voltage signals can enable the alarm to send alarm signals of different types, such as high volume short-time alarm and low volume long-time alarm, so that the staff can conveniently and quickly judge the pressure of 6 main gas pipes.
In order to improve the working reliability of the alarm, the alarm is preferably an audible and visual alarm, and workers can be reminded conveniently from the audible sense and the visual sense. Of course, the type of alarm is not limited thereto.
The pressure detection piece 7 is matched with the alarm for use, so that the worker can be conveniently and automatically reminded of timely eliminating the abnormal pressure condition, and the welding quality is prevented from being influenced due to unstable pressure of the main gas pipe 6.
The invention also comprises a main valve 8 and a flow detection piece 9. The main valve 8 is arranged on the main gas pipe 6, and the on-off of the main gas pipe 6 is conveniently controlled. The main valve 8 is connected to the controller 5, and the main valve 8 is preferably a solenoid valve.
The flow detection piece 9 is connected with the controller 5 and arranged on the main gas pipe 6, and the flow of the main gas pipe 6 is conveniently detected. The flow rate detecting member 9 is preferably a flow rate detecting sensor.
The controller 5 adjusts the opening of the main valve 8 according to the signal sent by the flow detection piece 9, so as to adjust the flow of the main air pipe 6 to the preset flow. Specifically, when the flow of the main gas pipe 6 is too low, the controller 5 increases the opening of the main valve 8 according to a signal sent by the flow detection piece 9, and increases the flow of the main gas pipe 6 to a preset flow; when the flow of the main gas pipe 6 is too high, the controller 5 reduces the opening of the main valve 8 according to the signal sent by the flow detection piece 9, and reduces the flow of the main gas pipe 6 to a preset flow, so that the nitrogen flow of the main gas pipe 6 is equal to the sum of the nitrogen flows of the branch gas pipes 1, the situation that the pressure of the main gas pipe 6 is too high due to the fact that the flow of the main gas pipe 6 is larger than the sum of the flows required by the branch gas pipes 1 is avoided, and the situation that the gas supply speed of the hearth is too low due to the fact that the flow of the main gas pipe 6 is smaller than the sum of the flows required. Therefore, the flow of the main gas pipe 6 can be adjusted in real time by the flow detection piece 9, so that the flow of the main gas pipe 6 is automatically matched with the required flow of each branch gas pipe 1, the safety is improved, and the welding quality is further ensured.
Preferably, the utility model discloses still include the flow memory that links to each other with controller 5, conveniently utilize flow memory storage flow detection spare 9 to send the flow information to controller 5, count and analyze flow information through controller 5, for example summarize the daily consumption, the monthly consumption and the annual consumption of nitrogen gas to corresponding production plan is accurately worked out in proper order, and the nitrogen gas quantity is saved in the supply of effective management and control nitrogen gas. The utility model discloses still include the display that links to each other with controller 5, utilize the flow information that display controller 5 made statistics of, make things convenient for the staff in time to observe the consumption of nitrogen gas.
Preferably, consider that it is very easy to take place nitrogen gas leakage between total trachea 6 and bronchus 1, the utility model discloses still include coupling 10 and leak detection spare, wherein, coupling 10 is connected between total trachea 6 and all bronchus 1, and correspondingly, coupling 10 includes at least one air vent, and every air vent all links to each other with total trachea 6, and all air vents link to each other with all bronchus 1 one-to-one. The leakage detection piece is connected with the controller 5 and the pipe joint 10, so that the leakage amount of the pipe joint 10 can be conveniently detected. When the leakage detection part detects that the leakage amount of the pipe joint 10 is higher than or equal to the preset leakage amount, which means that the nitrogen leakage at the pipe joint 10 is serious, the controller 5 closes the main valve 8 according to a signal sent by the leakage detection part, so that a worker can conveniently replace or maintain the pipe joint 10; when the leakage detection part detects that the leakage amount of the pipe joint 10 is lower than the preset leakage amount, which means that nitrogen gas at the pipe joint 10 has almost no leakage, the controller 5 controls the main valve 8 to keep an open state according to a signal sent by the leakage detection part, so that the nitrogen gas is ensured to be smoothly supplied.
The leak detection member may be an ultrasonic gas detection sensor or a laser gas detection sensor, but the type is not limited thereto.
In order to prevent nitrogen gas from leaking, in this embodiment, it is preferable that any furnace is provided with a gas transmission connector 11 connected with a gas transmission pipe, and a gas transmission sealing member is arranged between the gas transmission connector 11 and the branch gas pipe 1, so as to effectively prevent nitrogen gas from escaping from a gap between the gas transmission connector 11 and the branch gas pipe 1 in the process of transmitting nitrogen gas. Specifically, the gas transmission joint 11 is connected with the bronchus 1 by a screw thread, and the gas transmission sealing member is preferably a rubber sealing sleeve sleeved on the gas transmission joint 11 and used for sealing a gap between nitrogen and the bronchus 1 from the gas transmission joint 11, but the type of the gas transmission sealing member is not limited thereto.
Similarly, in order to further prevent nitrogen gas leakage, the oxygen analyzer 4 is provided with a sampling joint connected with any sampling pipe 3, and a sampling sealing member is arranged between the sampling joint and the sampling pipe 3, so that nitrogen gas is effectively prevented from escaping from a gap between the sampling joint and the sampling pipe 3.
Preferably, the utility model discloses still include the state detection piece that links to each other with controller 5 for detect sampling pipe 3 and bronchus 1 connected state respectively. The state detection part can be an image processing device such as a camera or a camera and the like, is used for capturing the connection state between the sampling pipe 3 and the hearth, between the sampling pipe 3 and the oxygen analyzer 4, between the bronchus 1 and the main gas pipe 6 and between the bronchus 1 and the hearth, transmitting the captured image information to the controller 5, and judging whether the two adjacent parts are connected or not through the controller 5; if yes, the controller 5 starts the main valve 8 to realize nitrogen gas transmission; if not, the main valve 8 is controlled to be closed, so that nitrogen is prevented from being leaked in a large amount, cost is effectively saved, and reliability is improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a nitrogen gas reflow soldering equipment, includes at least one furnace, its characterized in that still includes:
at least one branch gas pipe (1) communicated with the hearth one by one to convey nitrogen, wherein any branch gas pipe (1) is provided with a branch valve (2) for controlling the on-off of the corresponding branch gas pipe (1);
an oxygen analyzer (4) communicated with the furnace chamber one by one through at least one sampling pipe (3) to detect the oxygen content of the furnace chamber;
and the controller (5) is connected with the oxygen analyzer (4) and the branch valve (2) and is used for controlling the opening and closing of the corresponding branch valve (2) according to a signal fed back by the oxygen analyzer (4) so as to enable the oxygen content of all the hearths to be within a preset range.
2. The nitrogen reflow apparatus of claim 1, further comprising:
a main gas pipe (6) connected to at least one of said branch gas pipes (1);
the pressure detection piece (7) is connected with the controller (5) and arranged on the main air pipe (6) to detect the pressure of the main air pipe (6);
and when the pressure detection piece (7) detects that the pressure of the main air pipe (6) is higher than or lower than a preset pressure, the controller (5) starts the alarm according to a signal sent by the pressure detection piece (7).
3. The nitrogen reflow apparatus of claim 2, further comprising:
a main valve (8) connected with the controller (5) and arranged on the main gas pipe (6);
the flow detection piece (9) is connected with the controller (5) and arranged on the main gas pipe (6) to detect the flow of the main gas pipe (6); the controller (5) is used for adjusting the opening of the main valve (8) according to a signal sent by the flow detection piece (9) so as to adjust the flow of the main air pipe (6) to a preset flow.
4. The nitrogen reflow apparatus of claim 3, further comprising:
the flow memory is connected with the controller (5) and used for storing the flow information sent to the controller (5) by the flow detection piece (9);
and the display is connected with the controller (5) and used for displaying the flow information counted by the flow memory.
5. The nitrogen reflow apparatus of claims 3 or 4, further comprising:
a pipe joint (10) connected between the main gas pipe (6) and all the branch gas pipes (1);
the leakage detection piece is connected with the controller (5) and arranged on the pipe joint (10) to detect the leakage amount of the pipe joint (10); and the controller (5) is used for closing the main valve (8) according to a signal sent by the leakage detection part when the leakage amount is higher than a preset leakage amount.
6. Nitrogen reflow soldering apparatus according to any one of claims 2 to 4, wherein any of the plenums is provided with a gas delivery connection (11) to the branch pipe (1), and a gas delivery seal is provided between the gas delivery connection (11) and the branch pipe (1).
7. The nitrogen reflow soldering apparatus of any one of claims 2 to 4, wherein the oxygen analyzer (4) is provided with a sampling connector connected with any one of the sampling pipes (3), and a sampling sealing member is arranged between the sampling connector and the sampling pipe (3).
8. The nitrogen reflow apparatus of claims 3 or 4, further comprising:
the state detection piece is connected with the controller (5) and is used for respectively detecting the connection state of the sampling tube (3) and the bronchus (1); the controller (5) is used for opening the main valve (8) after the sampling pipe (3) is respectively connected with the hearth and the oxygen analyzer (4) according to the signal sent by the state detection piece.
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| CN201920428553.5U CN210172748U (en) | 2019-03-29 | 2019-03-29 | Nitrogen reflow soldering equipment |
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| CN201920428553.5U CN210172748U (en) | 2019-03-29 | 2019-03-29 | Nitrogen reflow soldering equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379700A (en) * | 2020-09-25 | 2021-02-19 | 苏州浪潮智能科技有限公司 | Reflow soldering nitrogen flow control method, device and storage medium |
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2019
- 2019-03-29 CN CN201920428553.5U patent/CN210172748U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379700A (en) * | 2020-09-25 | 2021-02-19 | 苏州浪潮智能科技有限公司 | Reflow soldering nitrogen flow control method, device and storage medium |
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