CN103197709B - Control system and control method of vacuum reflowing welder - Google Patents
Control system and control method of vacuum reflowing welder Download PDFInfo
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- CN103197709B CN103197709B CN201310122713.0A CN201310122713A CN103197709B CN 103197709 B CN103197709 B CN 103197709B CN 201310122713 A CN201310122713 A CN 201310122713A CN 103197709 B CN103197709 B CN 103197709B
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Abstract
The invention discloses a control system and a control method of a vacuum reflowing welder. The control system comprises a touch screen, a heating controller, a vacuum pump actuator, a vacuum instrument, a water pump actuator, a temperature control sensor, a temperature detection sensor and a computer control center, wherein a time-temperature control curve is edited and displayed on the touch screen; the heating controller is connected with a heater and controls heating of the heater; the vacuum pump actuator is connected with a vacuum pump and enables the vacuum pump to conduct vacuum-pumping on a welding cavity in a controlling mode; the vacuum instrument detects the vacuum degree in the welding cavity; the water pump actuator is connected with a water pump and enables the water pump to conduct cooling water circulation in a controlling mode; the temperature control sensor is installed near the heater inside the welding cavity of the reflowing welder and detects the real-time temperature inside the welding cavity; the temperature detection sensor is installed inside the welding cavity of the reflowing welder and detects the real-time temperature of a weld assembly inside the welding cavity; and the computer control center is respectively connected with the touch screen, the heating controller, the vacuum pump actuator, the vacuum instrument, the water pump actuator, the temperature control sensor and the temperature detection sensor. The control system and the control method can accurately control the temperature inside the welding cavity.
Description
Technical field
The present invention relates to reflow machine technical field, specifically a kind of vacuum back-flow controlling system of welder and method.
Background technology
Due to the needs of the continuous miniaturization of electronic product pcb board, occurred chip component, traditional welding method can not meet the needs of.Along with the development of surface mounting technology, the reflow machine as a surface mounting technology part is also developed accordingly, and its application is increasingly extensive, is almost all applied at all electronics field.In the welding chamber formed in the welding casing of reflow machine, there is well heater, the elements on circuit board in welding chamber is passed through the solder(ing) paste of fusing together with welding circuit board.Because different solder(ing) pastes has different characteristics, so when welding, need to carry out control temperature according to solder(ing) paste used by the ideal temperature curve meeting this solder(ing) paste welding performance, to obtain high-quality welding product.But the temperature control system of existing reflow machine and method obtain actual temperature differs comparatively far away with ideal temperature curve, therefore the weldment obtained is more difficult reaches higher quality level.And the control in whole welding process between each step is not very perfect, affects work efficiency.
As can be seen here, the control system of above-mentioned existing vacuum back-flow welding machine with in use in structure, obviously still has inconvenience and defect, and is urgently further improved.The present inventor's actively in addition research and innovation, to founding a kind of vacuum back-flow controlling system of welder and method of novelty, makes it have more practicality.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of accurate vacuum back-flow controlling system of welder controlling welding cavity temperature.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
Vacuum back-flow controlling system of welder, comprising:
Touch-screen, thereon editor's also displaying time-temperature control curve;
Heating controller, is connected with well heater, by the temperature control signals control heater heating received;
Vacuum pump driver, is connected with vacuum pump, and what control that vacuum pump carries out the welding chamber of reflow machine vacuumizes process;
Vacuum instrumentation, is connected with the welding chamber of reflow machine, to detect the vacuum tightness in welding chamber;
Water pump driver, is connected with water pump, controls water pump and carries out cooling water circulation;
Temperaturecontrol sensor, is located at reflow machine and welds near the well heater of inside cavity, detect the real time temperature in welding chamber;
Temperature detecting sensor, is located in the welding chamber of reflow machine, the real time temperature of weldment in detection welding chamber;
Conputer controlled center, is connected with touch-screen, heating controller, vacuum pump driver, vacuum instrumentation, water pump driver, temperaturecontrol sensor and temperature detecting sensor respectively; Wherein
Conputer controlled center sends a signal to vacuum pump driver to drive vacuum pump work; The vacuum tightness data sent to vacuum instrumentation when conputer controlled receive centre reach after setting requires, conputer controlled center sends temperature control signals to heating controller, make well heater temporally-temperature control curve heats, conputer controlled center generates the time temperature data be associated with the Time-temperature controlling curve edited, and the temperature that temperaturecontrol sensor is detected with time temperature data to combine generation temperature control signals;
The real time temperature that conputer controlled center detects according to temperature detecting sensor simultaneously generates actual temperature curve, and display on the touchscreen; After having welded, conputer controlled center sends a signal to water pump driver and lowers the temperature to drive water pump recirculated cooling water;
Time-temperature controlling curve is updated in contrast according to actual temperature curve and ideal temperature curve, so repeatedly until actual temperature curve reaches requirement, and is undertaken adding thermal weld by final Time-temperature controlling curve.
As preferably, above-mentioned vacuum back-flow controlling system of welder, wherein said conputer controlled center also connects air pump driver, first carries out drying by air pump driver control air pump to cooling water circulation pipeline before heating.
As preferably; above-mentioned vacuum back-flow controlling system of welder; wherein said conputer controlled center also connects safety return circuit; described safety return circuit comprises security lock arrangement, liquid level detection device, cavity cover switch pick-up unit and spin manifold temperature pick-up unit, and conputer controlled center is protected reflow machine operation by safety return circuit.
As preferably, above-mentioned vacuum back-flow controlling system of welder, wherein said conputer controlled center also connects the camera head for the inspecting and recording to welding process.
As preferably, above-mentioned vacuum back-flow controlling system of welder, wherein edit session-temperature control curve is realized by the time temperature data directly dragging that curve or amendment be associated with Time-temperature controlling curve.
As preferably, above-mentioned vacuum back-flow controlling system of welder, wherein edits described Time-temperature controlling curve and comprises the overall offset of different time sections curve and the fine setting of partial trace.
Another object of the present invention is for providing a kind of accurate vacuum back-flow welding machine control method controlling welding cavity temperature.The technical scheme realizing this object is as follows:
Vacuum back-flow welding machine control method, comprises the steps:
A. edit session-temperature control curve;
B. vacuumize the welding chamber of reflow soldering, after vacuum tightness reaches setting requirement, heat, the Time-temperature controlling curve wherein obtained by step a inediting according to the real time temperature adjustment well heater in the welding chamber of detection heats;
C. generate actual temperature curve according to the real time temperature of weldment in the welding chamber detected, and Controlled cooling system is lowered the temperature after welding completes;
D. Time-temperature controlling curve is updated according to the contrast of actual temperature curve and ideal temperature curve, so repeatedly until actual temperature curve determines final Time-temperature controlling curve after reaching requirement.
As preferably, above-mentioned vacuum back-flow welding machine control method, wherein first carries out drying to the cooling water circulation passage in cooling system before heating.
As preferably; above-mentioned vacuum back-flow welding machine control method; wherein protected running reflow machine by safety return circuit before heating with in heating process, safety return circuit comprises security lock arrangement, liquid level detection device, cavity cover switch pick-up unit and spin manifold temperature pick-up unit.
As preferably, above-mentioned vacuum back-flow welding machine control method, wherein implements monitoring and record by camera system to welding process in welding process.
As preferably, above-mentioned vacuum back-flow welding machine control method, wherein edit session-temperature control curve is realized by the time temperature data directly dragging that curve or input be associated with Time-temperature controlling curve.
As preferably, above-mentioned vacuum back-flow welding machine control method, wherein edits described Time-temperature controlling curve and comprises the overall offset of different time sections curve and the fine setting of partial trace.
As preferably, above-mentioned vacuum back-flow welding machine control method, the temperature control signals wherein generated by the time temperature data associated with Time-temperature controlling curve being combined with real time temperature in the welding chamber of detection inputs heating controller to be carried out control heater and heats.
Compared with prior art, beneficial effect of the present invention is:
The present invention carrys out edit session-temperature control curve by directly drawing curve, and carry out control heater according to this controlling curve and heat, and generate actual temperature curve by the actual temperature detected, contrast according to actual temperature curve and ideal temperature curve carrys out regulation time-temperature control curve, finally, the actual temperature realized in welding chamber conforms to ideal temperature curve or close, can accurately control to weld cavity temperature, the quality of raising weldment.And the inventive method is simple, be easy to operation, without the need to training and experience.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of vacuum back-flow controlling system of welder of the present invention;
Fig. 2 is the schematic flow sheet of vacuum back-flow welding machine control method of the present invention.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of break-off type radome proposed according to the present invention, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
Fig. 1 is the structural representation of vacuum back-flow controlling system of welder of the present invention.As shown in Figure 1, vacuum back-flow controlling system of welder, comprising:
Touch-screen, thereon editor's also displaying time-temperature control curve;
Heating controller, is connected with well heater, by the temperature control signals control heater heating received;
Vacuum pump driver, is connected with vacuum pump, and what control that vacuum pump carries out the welding chamber of reflow machine vacuumizes process;
Vacuum instrumentation, is connected with the welding chamber of reflow machine, to detect the vacuum tightness in welding chamber;
Water pump driver, is connected with water pump, controls water pump and carries out cooling water circulation;
Temperaturecontrol sensor, is located at reflow machine and welds near the well heater of inside cavity, detect the real time temperature in welding chamber;
Temperature detecting sensor, is located in the welding chamber of reflow machine, the real time temperature of weldment in detection welding chamber;
Conputer controlled center, is connected with touch-screen, heating controller, vacuum pump driver, vacuum instrumentation, water pump driver, temperaturecontrol sensor and temperature detecting sensor respectively; Wherein
Conputer controlled center sends a signal to vacuum pump driver to drive vacuum pump work; The vacuum tightness data sent to vacuum instrumentation when conputer controlled receive centre reach after setting requires, conputer controlled center sends temperature control signals to heating controller, make well heater temporally-temperature control curve heats, conputer controlled center generates the time temperature data be associated with the Time-temperature controlling curve edited, and the temperature that temperaturecontrol sensor is detected with time temperature data to combine generation temperature control signals;
The real time temperature that conputer controlled center detects according to temperature detecting sensor simultaneously generates actual temperature curve, and display on the touchscreen; After having welded, conputer controlled center sends a signal to water pump driver and lowers the temperature to drive water pump recirculated cooling water;
Time-temperature controlling curve is updated in contrast according to actual temperature curve and ideal temperature curve, so repeatedly until actual temperature curve reaches requirement, and is undertaken adding thermal weld by final Time-temperature controlling curve.
The present invention is heated by the Time-temperature controlling curve of control heater by editor, and the actual temperature curve obtained and ideal temperature curve are carried out contrast and carrys out regulation time-temperature control curve, actual temperature curve is finally made to conform to ideal temperature curve or close, make the best performance of solder(ing) paste like this, significantly improve the quality of weldment (pcb board etc.).And each step in welding process connects smooth and easy, improves the quality of products further and work efficiency.By temperaturecontrol sensor is arranged near well heater, can heat according to the Time-temperature controlling curve of editor by control heater more accurately.
Preferred as above-described embodiment, wherein said conputer controlled center also connects air pump driver, first carries out drying by air pump driver control air pump to cooling water circulation pipeline before heating.The present invention first carries out drying by air pump to cooling water circulation pipeline before heating, avoids because residual chilled water at high temperature causes the harm such as blast.
Preferred as above-described embodiment; wherein said conputer controlled center also connects safety return circuit; described safety return circuit comprises security lock arrangement, liquid level detection device, cavity cover switch pick-up unit and spin manifold temperature pick-up unit, and conputer controlled center is protected reflow machine operation by safety return circuit.Just working signal can be sent when only having conputer controlled Spot detection all normal to each several part in safety return circuit, reflow machine just can add thermowelding operation accordingly, and any part in welding process in safety return circuit is extremely (as liquid level exceeds safe range, spin manifold temperature exceedes safe-guard line etc.) all can report to the police or stop reflow machine running, avoid the generation of accident.
Preferred as above-described embodiment, wherein conputer controlled center also connects the camera head for the inspecting and recording to welding process.Improve the quality of products, avoid directly observing and injuring eyes.
Preferred as above-described embodiment, wherein edit session-temperature control curve is realized by the time temperature data directly dragging that curve or amendment be associated with Time-temperature controlling curve.By by mouse drag or directly drag curve with hand on the touchscreen editing curve can be made more directly perceived, convenient and swift.And by time temperature data edit, can realize curve precise fine-adjustment.
As preferably, above-mentioned vacuum controlling system of welder, wherein edits described Time-temperature controlling curve and comprises the overall offset of different time sections curve and the fine setting of partial trace.Can ensure that the actual welding curve under some time period reaches process curve requirement, finally obtain the time-temperature setting operation of complete matching technique curve.
The technical scheme of vacuum back-flow welding machine control method provided by the invention is as follows: see Fig. 2 and the above-mentioned description about control system part, and Fig. 2 is the schematic flow sheet of vacuum back-flow welding machine control method of the present invention.Vacuum back-flow welding machine control method, comprises the steps:
A. edit session-temperature control curve;
B. vacuumize the welding chamber of reflow soldering, after vacuum tightness reaches setting requirement, heat, the Time-temperature controlling curve wherein obtained by step a inediting according to the real time temperature adjustment well heater in the welding chamber of detection heats;
C. generate actual temperature curve according to the real time temperature of weldment in the welding chamber detected, and Controlled cooling system is lowered the temperature after welding completes;
D. Time-temperature controlling curve is updated according to the contrast of actual temperature curve and ideal temperature curve, so repeatedly until actual temperature curve determines final Time-temperature controlling curve after reaching requirement.
The inventive method achieves welds solder(ing) paste by its ideal temperature curve intensification melting, makes the best performance of solder(ing) paste, significantly improves the quality of weldment (pcb board etc.).And each step in welding process connects smooth and easy, improves the quality of products further and work efficiency.
Preferred as above-described embodiment, wherein first carries out drying to the cooling water circulation passage in cooling system before heating.Avoid and retain chilled water danger at high temperature.
Preferred as above-described embodiment; wherein protected running reflow machine by safety return circuit before heating with in heating process, safety return circuit comprises security lock arrangement, liquid level detection device, cavity cover switch pick-up unit and spin manifold temperature pick-up unit.The safe operation that safety return circuit ensure that welding machine is set.
Preferred as above-described embodiment, wherein implements monitoring and record by camera system to welding process in welding process.Avoid and directly observe injury eyes, and can be used as the certificate of quality of each welding product.
Preferred as above-described embodiment, wherein edit session-temperature control curve is realized by the time temperature data directly dragging that curve or input be associated with Time-temperature controlling curve.Be easy to operation, difficulty is low.
Preferred as above-described embodiment, wherein edits described Time-temperature controlling curve and comprises the overall offset of different time sections curve and the fine setting of partial trace.
Preferred as above-described embodiment, the temperature control signals wherein generated by the time temperature data associated with Time-temperature controlling curve being combined with real time temperature in the welding chamber of detection inputs heating controller to be carried out control heater and heats.
In addition, can also by importing the ideal temperature curve of solder(ing) paste in the coordinate system of edit session-temperature control curve in present system and method, and the unit being adjusted to both is consistent, thus can according to ideal temperature curve edit session-temperature control curve first.More reduce the difficulty of edit session-temperature control curve, operating personnel need not give training, experience also need not be had to get final product reality.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (13)
1. vacuum back-flow controlling system of welder, is characterized in that, comprising:
Touch-screen, thereon editor's also displaying time-temperature control curve;
Heating controller, is connected with well heater, by the temperature control signals control heater heating received;
Vacuum pump driver, is connected with vacuum pump, and what control that vacuum pump carries out the welding chamber of reflow machine vacuumizes process;
Vacuum instrumentation, is connected with the welding chamber of reflow machine, to detect the vacuum tightness in welding chamber;
Water pump driver, is connected with water pump, controls water pump and carries out cooling water circulation;
Temperaturecontrol sensor, is located at reflow machine and welds near the well heater of inside cavity, detect the real time temperature in welding chamber;
Temperature detecting sensor, is located in the welding chamber of reflow machine, the real time temperature of weldment in detection welding chamber;
Conputer controlled center, is connected with touch-screen, heating controller, vacuum pump driver, vacuum instrumentation, water pump driver, temperaturecontrol sensor and temperature detecting sensor respectively; Wherein
Conputer controlled center sends a signal to vacuum pump driver to drive vacuum pump work; The vacuum tightness data sent to vacuum instrumentation when conputer controlled receive centre reach after setting requires, conputer controlled center sends temperature control signals to heating controller, make well heater temporally-temperature control curve heats, conputer controlled center generates the time temperature data be associated with the Time-temperature controlling curve edited, and the temperature that temperaturecontrol sensor is detected with time temperature data to combine generation temperature control signals;
The real time temperature that conputer controlled center detects according to temperature detecting sensor simultaneously generates actual temperature curve, and display on the touchscreen; After having welded, conputer controlled center sends a signal to water pump driver and lowers the temperature to drive water pump recirculated cooling water;
Time-temperature controlling curve is updated in contrast according to actual temperature curve and ideal temperature curve, so repeatedly until actual temperature curve reaches requirement, and is undertaken adding thermal weld by final Time-temperature controlling curve.
2. vacuum back-flow controlling system of welder according to claim 1, is characterized in that, described conputer controlled center also connects air pump driver, first carries out drying by air pump driver control air pump to cooling water circulation pipeline before heating.
3. vacuum back-flow controlling system of welder according to claim 1; it is characterized in that; described conputer controlled center also connects safety return circuit; described safety return circuit comprises security lock arrangement, liquid level detection device, cavity cover switch pick-up unit and spin manifold temperature pick-up unit, and conputer controlled center is protected reflow machine operation by safety return circuit.
4. vacuum back-flow controlling system of welder according to claim 1, is characterized in that, described conputer controlled center also connects the camera head for the inspecting and recording to welding process.
5. vacuum back-flow controlling system of welder according to claim 1, is characterized in that, wherein edit session-temperature control curve is realized by the time temperature data directly dragging curve or amendment and be associated with Time-temperature controlling curve.
6. vacuum back-flow controlling system of welder according to claim 1, is characterized in that, wherein edits described Time-temperature controlling curve and comprises the overall offset of different time sections curve and the fine setting of partial trace.
7. vacuum back-flow welding machine control method, is characterized in that, comprises the steps:
A. edit session-temperature control curve;
B. vacuumize the welding chamber of reflow soldering, after vacuum tightness reaches setting requirement, heat, the Time-temperature controlling curve wherein obtained by step a inediting according to the real time temperature adjustment well heater in the welding chamber of detection heats;
C. generate actual temperature curve according to the real time temperature of weldment in the welding chamber detected, and Controlled cooling system is lowered the temperature after welding completes;
D. Time-temperature controlling curve is updated according to the contrast of actual temperature curve and ideal temperature curve, so repeatedly until actual temperature curve determines final Time-temperature controlling curve after reaching requirement.
8. vacuum back-flow welding machine control method according to claim 7, is characterized in that, first carries out drying to the cooling water circulation passage in cooling system before heating.
9. vacuum back-flow welding machine control method according to claim 7; it is characterized in that; protected running reflow machine by safety return circuit before heating with in heating process, safety return circuit comprises security lock arrangement, liquid level detection device, cavity cover switch pick-up unit and spin manifold temperature pick-up unit.
10. vacuum back-flow welding machine control method according to claim 7, is characterized in that, implements monitoring and record in welding process by camera system to welding process.
11. vacuum back-flow welding machine control methods according to claim 7, is characterized in that, wherein edit session-temperature control curve is realized by the time temperature data directly dragging that curve or input be associated with Time-temperature controlling curve.
12. vacuum back-flow welding machine control methods according to claim 7, is characterized in that, wherein edit described Time-temperature controlling curve and comprise the overall offset of different time sections curve and the fine setting of partial trace.
13. vacuum back-flow welding machine control methods according to claim 7, it is characterized in that, the temperature control signals wherein generated by the time temperature data associated with Time-temperature controlling curve being combined with real time temperature in the welding chamber of detection inputs heating controller to be carried out control heater and heats.
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| CN103028802A (en) * | 2012-12-31 | 2013-04-10 | 北京中科同志科技有限公司 | Temperature control method for reflow welding machine |
| CN107639316A (en) * | 2016-07-21 | 2018-01-30 | 鸿骐新技股份有限公司 | Chamber profile reflow oven board and its temperature self-compensation control method |
| CN111805038A (en) * | 2019-04-10 | 2020-10-23 | 薛星海 | Offline positive-pressure welding furnace system and operation method thereof |
| CN111805039B (en) * | 2019-04-11 | 2022-02-08 | 中科同帜半导体(江苏)有限公司 | Online positive pressure welding furnace system and operation method thereof |
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| JP2004327816A (en) * | 2003-04-25 | 2004-11-18 | Denso Corp | Method and device for reflow soldering |
| CN1948873A (en) * | 2006-11-09 | 2007-04-18 | 上海交通大学 | Operating and optimization control method of differential pressure precooling fan |
| JP5115611B2 (en) * | 2010-09-24 | 2013-01-09 | 株式会社デンソー | Call system, in-vehicle device, and exchange |
| JPWO2012070264A1 (en) * | 2010-11-23 | 2014-05-19 | 三菱電機株式会社 | Reflow soldering apparatus and reflow soldering method |
| CN202571519U (en) * | 2012-03-26 | 2012-12-05 | 上海飞恩微电子有限公司 | Rotary reflow soldering furnace |
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Application publication date: 20130710 Assignee: Beijing torch Technology Co. Ltd. Assignor: Beijing Zhongke Torch Technology Co., Ltd. Contract record no.: 2015990000593 Denomination of invention: Control system and control method of vacuum reflowing welder Granted publication date: 20150318 License type: Exclusive License Record date: 20150709 |
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Address after: 100016, No. 6, Jiuxianqiao Road, building 1, building 10, Chaoyang District, Beijing, China. 6D Patentee after: BEIJING ZHONGKE TORCH TECHNOLOGY CO., LTD. Address before: 100016, No. 6, Jiuxianqiao Road, building 1, building 10, Chaoyang District, Beijing, China. 6D Patentee before: Beijing Zhongke Torch Technology Co., Ltd. |