CN205309492U - Reflow furnace - Google Patents
Reflow furnace Download PDFInfo
- Publication number
- CN205309492U CN205309492U CN201620027478.8U CN201620027478U CN205309492U CN 205309492 U CN205309492 U CN 205309492U CN 201620027478 U CN201620027478 U CN 201620027478U CN 205309492 U CN205309492 U CN 205309492U
- Authority
- CN
- China
- Prior art keywords
- reflow soldering
- valve
- warm area
- nitrogen
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a reflow furnace, including nitrogen gas supply system and nitrogen gas concentration monitoring system, the nitrogen gas supply system includes his three air feed branch roads of nitrogen gas air supply, and reflow furnace includes furnace body and time furnace body, the anterior air feed of first air feed zhi luxiang reflow furnace weld zone, second air feed zhiluxiang reflow furnace heating area's front end air feed, all the other part air feed of third air feed zhiluxiang reflow furnace. The utility model discloses reflow furnace's nitrogen gas supply system adopts three air feed branch roads to supply with nitrogen gas to reflow furnace's different positions respectively according to the demand of the technology of reflow soldering, and simple structure, manual control or automatic control are relatively more convenient.
Description
[technical field]
This utility model relates to reflow soldering, particularly relates to a kind of reflow soldering.
[background technology]
The microminiaturization of the components and parts on circuit board and the multifunction of product, drive densification and the three-dimensional of circuit board mounting design. it is characterized in that solder joint is more and more intensive, welding spot size is more and more small, spacing is more and more thinner. weld defect is the principal element affecting Quality of electronic products, in order to ensure the quality of surface adhered with electronic product, the process characteristic of the core link Reflow Soldering of surface mount process has been analyzed, and according to the temperature of Reflow Soldering and process characteristic the tin sweat(ing) to occurring in Reflow Soldering welding process, bridge is even, wicking, cavity, Manhattan phenomenon, the several frequently seen weld defects such as PC reflow soldering oxygen concentration monitoring system distortion, in order to effectively reduce the occurrence rate of weld defect, improve the welding quality of Reflow Soldering, what adopt in the same industry at present is that the mode adjustment valve manual adjustments nitrogen directly to burner hearth supplying nitrogen is constant, substantial amounts of to stove the supply of nitrogen constantly, ensure the anti-oxidation of quality of welding spot.
The patent No. a kind of reflow soldering apparatus that has been the disclosure of the invention of CN102717163A, this reflow soldering apparatus by supply in stove by after using in cooling, the medium of result heating, it is possible to reduce power consumption, and, it is possible to set desired temperature curve. Reflow soldering is configured with multiple body of heater continuously along the transport path of heating object, and it is covered by adiabator at least partially. Go to constitute preheating part, Reflow Soldering portion, cooling end successively from the entrance side of transport path towards outlet side. The medium, the such as nitrogen that are employed in cooling is supplied to the body of heater being included in Reflow Soldering portion. It is provided with pipe arrangement, by feeding medium in pipe arrangement, cooling down this region in the region of the preheating part adjacent with Reflow Soldering portion. Each heating warm area of the reflow soldering apparatus of this invention has a branch road for nitrogen, and a Valve controlling all used by each branch road, and structure is complicated, controls difficulty big.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of nitrogen feed system simple in construction, it is simple to the reflow soldering of control.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is, a kind of reflow soldering, system is monitored including nitrogen feed system and nitrogen gas concn, nitrogen feed system includes his three supply branch roads of Nitrogen source gases, and reflow soldering includes upper furnace body and lower furnace body, the anterior supply of the first supply Zhi Luxiang reflow soldering weld zone, the front end supply of the second supply Zhi Luxiang reflow soldering heating zone, the remainder supply of the 3rd supply Zhi Luxiang reflow soldering.
Above-described reflow soldering, heats warm area and two cooling warm areas including 10, the contiguous first cooling warm area of the tenth heating warm area; First supply branch road supplies to the 8th heating warm area and the 9th heating temperature of upper furnace body, second supply branch road supplies to the first heating warm area of upper furnace body and lower furnace body, 3rd supply branch road heats warm area, the tenth heating warm area and the first cooling warm area supply to the second heating warm area of upper furnace body to the 7th, simultaneously to the 8th heating warm area of lower furnace body and the 9th heating temperature supply.
Above-described reflow soldering, nitrogen feed system includes three manual modulation valves and three effusion meters, first supply branch road connects Nitrogen source gases by the first manual modulation valve, second supply branch road connects Nitrogen source gases by the second manual modulation valve, and the 3rd supply branch road connects Nitrogen source gases by the 3rd manual modulation valve; The outlet of manual modulation valve connects supply branch road by effusion meter.
Above-described reflow soldering, Nitrogen source gases includes pressure regulator valve, Pressure gauge, gas source switch valve and flow distribution plate, the output termination gas source switch valve of pressure regulator valve, the output termination flow distribution plate of switch valve, three described supply branch roads connect three outfans of flow distribution plate respectively; Pressure gauge connects pressure regulator valve.
Above-described reflow soldering, nitrogen feed system includes control circuit and proportioning valve, and the control circuit of nitrogen feed system includes the first controller, mode selection switch, oxygen analyzer and proportioning valve the first controller; The output of mode selection switch terminates the first controller, the outfan of input termination first controller of proportioning valve the first controller, and the output of proportioning valve the first controller terminates the control end of proportioning valve, proportioning valve and the first manual modulation valve and connects; The input of oxygen analyzer connects the sampled point of reflow soldering, output termination the first controller.
Above-described reflow soldering, nitrogen gas concn monitoring system, including gas analyzer for O2,4 electromagnetic valves and control circuit, the control circuit of the output termination nitrogen feed system of gas analyzer for O2, the control termination nitrogen gas concn monitoring system, control circuit control signal outfan of electromagnetic valve, the input of the output termination gas analyzer for O2 of electromagnetic valve; The input of 4 electromagnetic valves connects the front portion of the front portion of heating zone of reflow soldering, the middle part of flat-temperature zone, the middle part of weld zone and cooling zone respectively through pipeline.
Above-described reflow soldering, input termination the first heating warm area of the first electromagnetic valve, input termination the 6th heating warm area of the second electromagnetic valve, input termination the 9th heating warm area of the 3rd electromagnetic valve, input termination the first cooling warm area of the 4th electromagnetic valve.
Above-described reflow soldering, the entrance of the input pipeline of electromagnetic valve is positioned at the air port of upper furnace body bellows convection current air flue, and the outlet of nitrogen feed system supply branch road is arranged in the burner hearth outside the air port of warm area bellows convection current air flue.
Above-described reflow soldering, nitrogen gas concn monitoring system, control circuit includes second controller, 4 control button, 4 relays, 4 outfans controlling button connect second controller respectively, the coil of 4 relays is connected on 4 of second controller between outfan and ground respectively, and the main contacts of 4 relays is connected in the power supply circuits of 4 electromagnetic valves respectively.
Above-described reflow soldering, nitrogen gas concn monitoring system, control circuit includes automatic with manual switching key and time automatic transfer switch, automatically with the input of the output termination second controller of manual switching key; A plurality of outfans of time automatic transfer switch connect a plurality of inputs of second controller respectively.
The nitrogen feed system of this utility model reflow soldering according to the demand of the technique of reflow soldering, adopts three supply branch roads that the different parts of reflow soldering supplies nitrogen respectively, simple in construction, Non-follow control or automatically control all more convenient.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail.
Fig. 1 is the structural representation of the nitrogen feed system of this utility model embodiment reflow soldering.
Fig. 2 is the schematic diagram of this utility model embodiment nitrogen feed system control circuit.
Fig. 3 is the schematic diagram of this utility model embodiment nitrogen gas concn monitoring system, control circuit.
[detailed description of the invention]
The structure of this utility model embodiment reflow soldering nitrogen feed system is as depicted in figs. 1 and 2, including Nitrogen source gases, control circuit, proportioning valve V3, three supply branch roads, three effusion meters and three manual modulation valves, first supply branch road B1 supplies to the anterior of reflow soldering flat-temperature zone, second supply branch road B2 supplies to the front end of reflow soldering heating zone, and the 3rd supply branch road B3 supplies to the remainder of reflow soldering.
Reflow soldering includes upper furnace body W1 and lower furnace body W2, upper furnace body W1 and lower furnace body W2 and respectively includes 10 heating warm areas and two cooling warm areas from front to back, the contiguous first cooling warm area of the tenth heating warm area. Wherein, first to fourth heating warm area is heating zone, and the 5th to the 7th heating warm area is flat-temperature zone; 8th to the tenth heating warm area is weld zone.
First supply branch road B1 supplies to the 8th heating warm area and the 9th heating temperature of upper furnace body W1, second supply branch road B2 supplies to the first heating warm area of upper furnace body W1 and lower furnace body W2,3rd supply branch road B3 is divided into upper furnace body branch road and lower furnace body branch road, and upper furnace body branch road heats warm area, the tenth heating warm area and the first cooling warm area supply to the second heating warm area of upper furnace body W1 to the 7th; Lower furnace body branch road supplies to the 8th heating warm area and the 9th heating temperature of lower furnace body W2.
First supply branch road B1 connects Nitrogen source gases by the first manual modulation valve MV1, and the second supply branch road B2 connects Nitrogen source gases by the second manual modulation valve MV2, and the 3rd supply branch road B3 connects Nitrogen source gases by the 3rd manual modulation valve MV3. Manual modulation valve MV1, MV2 and MV# outlet respectively through effusion meter F1, F2 and F3 connect supply branch road B1, B2 and B3. Each outlet supplying branch road is arranged in the burner hearth outside the air port of warm area bellows convection current air flue.
Nitrogen source gases includes pressure regulator valve V1, digital pressure gauge D1, gas source switch valve V2 and flow distribution plate P1, the output termination gas source switch valve V2 of pressure regulator valve V1, output termination the flow distribution plate P1, three supply branch road B1 of switch valve V2, B2 and B3 entrance connect three outfans of flow distribution plate P1 respectively. Digital pressure gauge D1 meets pressure regulator valve V1.
As in figure 2 it is shown, control circuit includes controller, mode selection switch B6, oxygen analyzer A1, proportional valve controller VEA250, alarm lamp L1 and alarm buzzer B5.
Controller includes the PLC of two communication connections, and the model of a PLC is KV-N14DT, and the model of the 2nd PLC is KV-N3AM.
The input of output termination the oneth PLC, the oxygen analyzer A1 of mode selection switch B6 connects the sampled point of reflow soldering, the input of output termination the 2nd PLC. The outfan of input termination the 2nd PLC of proportional valve controller VEA250, the control end of the output termination proportioning valve V3 of proportioning valve V3 controller, proportioning valve V3 and the first manual modulation valve also connect. Alarm lamp L1 and alarm buzzer B5 connects the outfan of a PLC respectively.
Oneth PLCKV-N24DT is RUN pattern, mode selection switch B6 is MANUAL CONTROL mode when disconnecting with first branch road flow nitrogen charging with 80L, and the terminal output 5V voltage signal of a PLC drives proportioning valve V3 to send out 100% output (0-5V correspondence 0-100% is to control valve opening) to proportional valve controller.
Mode selection switch B6 Guan Bi is for automatic control mode, also it is the configuration switch of PPM value simultaneously, corresponding oxygen divides the value of instrument to set, oxygen divides the voltage signal that instrument converts 4-20mA to current signal input the 2nd PLC, the 2nd PLC after PPM value being processed export 0-5V to proportional valve controller to drive proportional valve control nitrogen flow. When after 100% nitrogen flow is supplied 2 minutes, also PPM value is also less than setting value, alarm lamp L1 and alarm buzzer B5 reports to the police. When PPM value is higher than setting value in situation, pressing B7 quick nitrogen charging button by changes valve opening is 100% be adjusted to maximum output 80L, regularly returns to automatic control state after 2min,
When PPM value arrives setting value, in the way of subtracting 10L by 2 minutes, it is automatically adjusted proportioning valve nitrogen charging (totally 9 aperture 80L, 70L, 60L, 50L, 40L, 30L, 20L, 10L, 0L); PPM value, lower than setting value, also down adjusts a valve opening (dropping 10L output) for two minutes when declining and adjusts proportioning valve. PPM value exports output warning instruction and warning buzzing (PLCOUT500501 is 1) when 80L time delay is also higher than setting value for 2 minutes higher than setting value and for maximum
This utility model embodiment can reduce nitrogen supply (NS) amount in a case where, makes consumption reducing nitrogen:
At the initial stage of production, oxygen concentration has reached the index of below setting value, it is possible to reduce the use of nitrogen supply (NS) amount, thus cutting down nitrogen to make consumption;
When solder reflow device did not have plate to produce, when oxygen concentration reaches below setting value, it is possible to reduce nitrogen supply (NS) amount, make consumption reducing nitrogen;
In Reflow Soldering under the environment produced, oxygen concentration has reached the index of below setting value, then can also reduce nitrogen supply (NS) amount, makes consumption reducing nitrogen.
This utility model above example nitrogen feed system has the advantage that
1. simple in construction, easy to control, it is possible to control nitrogen discharge capacity in subregional, it is possible to arbitrary set nitrogen use level value;
2. nitrogen use level can select hand control manually or automatically, simple to operate;
3. it is effectively controlled the property constantly that nitrogen situation in stove is constant, adds the quality assurance of product, it is possible to reduce product cost.
The structure of this utility model embodiment nitrogen gas concn monitoring system and principle as shown in figures 1 and 3, monitor the control circuit of system including oxygen analyzer A1,4 electromagnetic valve SV1-SV4 and nitrogen gas concn.
The control circuit of the output termination nitrogen gas concn monitoring system of oxygen analyzer A1. The control circuit control signal outfan controlling termination nitrogen gas concn monitoring system of electromagnetic valve, the input of the output termination oxygen analyzer A1 of electromagnetic valve.
The input of 4 electromagnetic valve SV1-SV4 connects the front portion of the front portion of reflow soldering upper furnace body heating zone, the middle part of flat-temperature zone, the middle part of weld zone and cooling zone respectively through pipeline. The entrance of electromagnetic valve SV1-SV4 input pipeline is positioned at the air port of upper furnace body bellows convection current air flue.
Wherein, input termination the first heating warm area of 1 electromagnetic valve SV, input termination the 6th heating warm area of electromagnetic valve SV2, input termination the 9th heating warm area of electromagnetic valve SV3, input termination the first cooling warm area of electromagnetic valve SV4.
The control circuit of nitrogen gas concn monitoring system includes second controller, and 4 control button B11-B14,4 relay K 1-K4.
Second controller is PLC, and the model of PLC is KV-N24DT.
The outfan controlling button B11-B14 connects second controller respectively, and the coil of 4 relays is connected on 4 of second controller between outfan and ground respectively.The main contacts K11-K41 of 4 relay K 1-K4 is connected in the power supply circuits of electromagnetic valve SV1-SV4.
Automatically with manual switching key B8 and time automatic transfer switch SW1, automatically with the input of the output termination second controller of manual switching key B8; 10 outfans of time automatic transfer switch SW1 connect 10 inputs of second controller respectively.
The input of the output termination nitrogen feed system second PLC KV-N3AM of oxygen analyzer A1.
The reflow soldering nitrogen gas concn monitoring system of this utility model above example is MANUAL CONTROL mode when automatic with manual switching key B8 disconnects, 4 can be passed through and control button B11-B14 4 test point electromagnetic valve SV1-SV4 of switching, such as, when push button B11 time, the display lamp of B11 button is bright, the coil of relay K 1 obtains electric, and the normally opened contact K11 of K1 connects, and drives SV1 electromagnetic valve to connect; When push button B12 time, the display lamp of B12 button is bright, and the coil of relay K 2 obtains electric, and the normally opened contact K21 of K2 connects, and drives SV2 electromagnetic valve to connect ....
It is automatic control mode when automatic with manual switching key B8 connects, adjust switching switch SW1 fixed time interval, switching circulation is gathered 0-10 minute automatically run, self-timing switching starts 4 electromagnetic valve SV1-SV4, cyclically obtains the nitrogen gas concn data of 4 sampled points with self-timing.
This utility model above example nitrogen gas concn monitoring system has the advantages that;
While subregion is tested, it is possible to conveniently, at random select nitrogen gas concn in time cycle detection stove, or manually select the region needing detection, simple in construction, easy to operate; Can effectively detect nitrogen situation in stove, improve the qualification rate of product.
Claims (10)
1. a reflow soldering, system is monitored including nitrogen feed system and nitrogen gas concn, nitrogen feed system includes Nitrogen source gases and supply branch road, reflow soldering includes upper furnace body and lower furnace body, it is characterized in that, nitrogen feed system includes three described supply branch roads, the anterior supply of the first supply Zhi Luxiang reflow soldering weld zone, the front end supply of the second supply Zhi Luxiang reflow soldering heating zone, the remainder supply of the 3rd supply Zhi Luxiang reflow soldering.
2. reflow soldering according to claim 1, it is characterised in that include 10 heating warm areas and two cooling warm areas, the contiguous first cooling warm area of the tenth heating warm area; First supply branch road supplies to the 8th heating warm area and the 9th heating temperature of upper furnace body, second supply branch road supplies to the first heating warm area of upper furnace body and lower furnace body, 3rd supply branch road heats warm area, the tenth heating warm area and the first cooling warm area supply to the second heating warm area of upper furnace body to the 7th, simultaneously to the 8th heating warm area of lower furnace body and the 9th heating temperature supply.
3. reflow soldering according to claim 1, it is characterized in that, nitrogen feed system includes three manual modulation valves and three effusion meters, first supply branch road connects Nitrogen source gases by the first manual modulation valve, second supply branch road connects Nitrogen source gases by the second manual modulation valve, and the 3rd supply branch road connects Nitrogen source gases by the 3rd manual modulation valve; The outlet of manual modulation valve connects supply branch road by effusion meter.
4. reflow soldering according to claim 2, it is characterized in that, Nitrogen source gases includes pressure regulator valve, Pressure gauge, gas source switch valve and flow distribution plate, the output termination gas source switch valve of pressure regulator valve, the output termination flow distribution plate of switch valve, three described supply branch roads connect three outfans of flow distribution plate respectively; Pressure gauge connects pressure regulator valve.
5. reflow soldering according to claim 4, it is characterised in that nitrogen feed system includes control circuit and proportioning valve, the control circuit of nitrogen feed system includes the first controller, mode selection switch, oxygen analyzer and proportioning valve the first controller;The output of mode selection switch terminates the first controller, the outfan of input termination first controller of proportioning valve the first controller, and the output of proportioning valve the first controller terminates the control end of proportioning valve, proportioning valve and the first manual modulation valve and connects; The input of oxygen analyzer connects the sampled point of reflow soldering, output termination the first controller.
6. reflow soldering according to claim 5, it is characterized in that, nitrogen gas concn monitoring system, including gas analyzer for O2,4 electromagnetic valves and control circuit, the control circuit of the output termination nitrogen feed system of gas analyzer for O2, the control termination nitrogen gas concn monitoring system, control circuit control signal outfan of electromagnetic valve, the input of the output termination gas analyzer for O2 of electromagnetic valve; The input of 4 electromagnetic valves connects the front portion of the front portion of heating zone of reflow soldering, the middle part of flat-temperature zone, the middle part of weld zone and cooling zone respectively through pipeline.
7. reflow soldering according to claim 6, it is characterized in that, input termination the first heating warm area of the first electromagnetic valve, input termination the 6th heating warm area of the second electromagnetic valve, input termination the 9th heating warm area of the 3rd electromagnetic valve, input termination the first cooling warm area of the 4th electromagnetic valve.
8. reflow soldering according to claim 6, it is characterized in that, the entrance of the input pipeline of electromagnetic valve is positioned at the air port of upper furnace body bellows convection current air flue, and the outlet of nitrogen feed system supply branch road is arranged in the burner hearth outside the air port of warm area bellows convection current air flue.
9. reflow soldering according to claim 1, it is characterized in that, nitrogen gas concn monitoring system, control circuit includes second controller, 4 control button, 4 relays, 4 outfans controlling button connect second controller respectively, the coil of 4 relays is connected on 4 of second controller between outfan and ground respectively, and the main contacts of 4 relays is connected in the power supply circuits of 4 electromagnetic valves respectively.
10. reflow soldering according to claim 1, it is characterised in that nitrogen gas concn monitoring system, control circuit includes automatic with manual switching key and time automatic transfer switch, automatically with the input of the output termination second controller of manual switching key; A plurality of outfans of time automatic transfer switch connect a plurality of inputs of second controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620027478.8U CN205309492U (en) | 2016-01-12 | 2016-01-12 | Reflow furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620027478.8U CN205309492U (en) | 2016-01-12 | 2016-01-12 | Reflow furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205309492U true CN205309492U (en) | 2016-06-15 |
Family
ID=56204207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620027478.8U Active CN205309492U (en) | 2016-01-12 | 2016-01-12 | Reflow furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205309492U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110874106A (en) * | 2018-08-31 | 2020-03-10 | 伊利诺斯工具制品有限公司 | Gas control system and method for reflow oven |
-
2016
- 2016-01-12 CN CN201620027478.8U patent/CN205309492U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110874106A (en) * | 2018-08-31 | 2020-03-10 | 伊利诺斯工具制品有限公司 | Gas control system and method for reflow oven |
| CN110874106B (en) * | 2018-08-31 | 2022-09-02 | 伊利诺斯工具制品有限公司 | Gas control system and method for reflow oven |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205309503U (en) | Reflow furnace's nitrogen gas supply system | |
| CN101737797B (en) | Pulse combustion control method | |
| CN101364115B (en) | Nitrogen closed-loop control method and system | |
| MY152329A (en) | Shielding gas flow controller for a welding apparatus | |
| EP2932809B1 (en) | Portable equipment for monitoring and controlling the level of oxygen in reflow oven atmosphere | |
| CN205309492U (en) | Reflow furnace | |
| CN110387454A (en) | The control system and method for steel ladle bottom argon blowing | |
| CN205309504U (en) | Reflow furnace nitrogen gas concentration monitoring system | |
| CN209265295U (en) | A kind of Reflow Soldering control system based on PID temperature control system | |
| CN208055392U (en) | The control system of steel ladle bottom argon blowing | |
| CN204440196U (en) | A kind of beer fermentation process temperature control equipment | |
| CN202511619U (en) | System for controlling tin melting furnace | |
| CN201444258U (en) | Coke reactivity control device with automatic-continuous air supply | |
| CN104317328A (en) | Resistance furnace temperature control system based on PLC | |
| CN206335218U (en) | A kind of reflow soldering welds nitrogen gas handling system | |
| US20240009497A1 (en) | Monitoring and extinguishing device | |
| CN109738794A (en) | A kind of real-time monitoring system of relay | |
| CN201389704Y (en) | Automatic brazing control device for brazing furnace | |
| CN215219524U (en) | Temperature control loop of skin heat tracing control system | |
| CN209639857U (en) | Detect the device of surface of workpiece temperature on plastic products | |
| CN104406415A (en) | Electric furnace electrode regulating system | |
| CN201681281U (en) | Monitoring system for alkali-free glassfibre wire drawing processes | |
| CN211458679U (en) | Oven constant temperature control system | |
| CN212476799U (en) | Hydraulic valve table control device | |
| CN210052064U (en) | Automatic temperature control system of horizontal continuous casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |