CN103635033B - Prevent the prevention system of circuit board goods clamp in reflow soldering processing procedure or board falling - Google Patents
Prevent the prevention system of circuit board goods clamp in reflow soldering processing procedure or board falling Download PDFInfo
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- CN103635033B CN103635033B CN201310486180.4A CN201310486180A CN103635033B CN 103635033 B CN103635033 B CN 103635033B CN 201310486180 A CN201310486180 A CN 201310486180A CN 103635033 B CN103635033 B CN 103635033B
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Abstract
The present invention relates to a kind of prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling, be applied in the surface mount process of circuit board production of articles, it comprises two inductors of the controller, the sensor circuit slab products that are provided with control program and can export control signal, is connected with two inductors and two counters to circuit board goods counting, the warning device that is connected and inductor is sensed the timer of the moment timing of circuit board goods, is connected with controller with two inductors respectively respectively; Controller also connects with signal with conveying device, and two inductors are arranged at respectively the front-end and back-end of reflow stove. Can there is the situation such as clamp or board falling in reflow stove in the present invention time, find in time the problems referred to above and make warning, play the further effect of aggravation of clamp or board falling that prevents, can avoid the abnormal problem of reflow soldering of bringing due to clamp or board falling, thereby can ensure the dependability of circuit board goods and reduce production costs.
Description
Technical field
The present invention relates to a kind ofly in the reflow soldering processing procedure of the SMT of board production technique, prevent that the prevention system of clamp or board falling phenomenon from appearring in circuit board goods in reflow stove.
Background technology
In SMT technique, by scolder in printing in advance on printed circuit board (PCB), part is mounted on the position of appointment by patch device again, then by the heating of reflow soldering (Reflow) equipment, preprinted scolder is made to its melting, thereby part and printed circuit board (PCB) are linked together, to reach reliable weld strength and electrical equipment conduction property.
Normally used reflow soldering equipment; after only responding to product in the time that circuit board goods enter wherein, return its server; and product by its track (Conveyor) velocity simulate pass through image; but the truths such as the clamp that it causes cannot overcome because of abnormal cause or unexpected abnormality time; especially in the time of this abnormal generation; circuit board goods still can transmit in reflow soldering equipment endlessly; cause more product to produce abnormal welding or serious scrap etc., have influence on the dependability energy of production cost and End-Customer end. Therefore, need in a kind of reflow soldering processing procedure in SMT technique of development and Design the system and device that can prevent product clamp and board falling or scrap.
Summary of the invention
The object of this invention is to provide one and can in reflow soldering processing procedure, prevent circuit board goods generation clamp or board falling, thus the prevention system that improves dependability and reduce production costs.
For achieving the above object, the technical solution used in the present invention is:
A kind of prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling, be applied in the surface mount process of circuit board production of articles, to prevent that the situation of clamp or board falling from appearring in described circuit board goods in time soldering furnace that carries out reflow soldering, described reflow stove and accessory has the described circuit board goods of confession enter front end wherein and supply described circuit board goods by the rear end of wherein exporting, and the last station of described reflow stove is provided with the conveying device of carrying wherein described circuit board goods, it comprises the controller that is provided with control program and can exports corresponding control signal, two inductors of the circuit board goods described in induction, two counters that are connected and described circuit board goods are counted with the inductor described in two respectively, be connected with the inductor described in two respectively and described inductor is sensed to the timer that the moment of described circuit board goods is carried out timing, the warning device being connected with described controller, described controller also connects with signal with described conveying device, and the inductor described in two is arranged at respectively the front-end and back-end of described reflow stove.
Preferably, described controller is PLC controller.
Preferably, the timer described in the counter described in be connected with the described inductor of front end that is positioned at described reflow stove and becomes one mutually; Counter described in counter described in be connected with the described inductor of rear end that is positioned at described reflow stove one and one becomes one mutually.
Preferably, described warning device includes but not limited to sounding alarm device or light emission alarm device.
The prevention method that the above-mentioned prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling adopts comprises the first precedence scheme and the second precedence scheme;
The first described precedence scheme comprises: (1) calculates or set the number maximum N of enterable circuit board goods in described reflow stove, (2) respond to respectively the described circuit board goods through the front-end and back-end of described reflow stove by the inductor described in two, and obtain entering the number S3 of the described circuit board goods in described reflow stove and the number S4 by the described circuit board goods of exporting in described reflow stove to carrying out counting respectively by the counter described in two, (3) relatively enter the number S3 of the described circuit board goods in described reflow stove and the number maximum N by enterable circuit board goods in the difference S3-S4 of the number S4 of the described circuit board goods of exporting in described reflow stove and described reflow stove by described controller: if when S3-S4=N, described controller to described conveying device send make into plate waiting signal to be conveyed enter the circuit board goods of described reflow stove enter into plate wait state, if when S3-S4 > N, described controller sends alarm signal and described warning device is reported to the police to described warning device, if when S3-S4 < N, described controller sends and wants partitioned signal and described conveying device is prepared to delivery circuit slab products in described reflow stove to described conveying device, and described prevention method is carried out the second precedence scheme,
The second described precedence scheme comprises: 1. calculate circuit board goods described in a slice time T through described reflow stove; 2. respond to respectively through the circuit board goods described in a slice of the front-end and back-end of described reflow stove by the inductor described in two, and carry out respectively by the timer described in two the circuit board goods that timing obtains described in a slice and enter the moment T3 of described reflow stove and the moment T4 by described reflow stove output; 3. by the circuit board goods described in described controller comparison a slice by the moment T4 of described reflow stove output with enter the time T that the circuit board goods described in difference T4-T3 and a slice of moment T3 of described reflow stove pass through described reflow stove: if when T4-T3≤T, described controller continues to carry out the first described precedence scheme, if when T4-T3 > T, described controller sends alarm signal and described warning device is reported to the police and stop sending the described partitioned signal of wanting to described warning device.
Preferably, described prevention method also comprises the 3rd precedence scheme of carrying out in the time of S3-S4 < N and T4-T3≤T, the 3rd described precedence scheme comprises that described conveying device, to before described reflow stove delivery circuit slab products, is delivered to described circuit board goods in described reflow stove after time delay t again.
Preferably, described time delay t is adjustable value.
Preferably, in described reflow stove the number maximum N of enterable circuit board goods by following process computation: calculate described number maximum N according to the length of the length of reflow stove and described circuit board goods or according to the production cycle of actual production process;
Circuit board goods described in a slice through the time T of described reflow stove by following process computation: calculate the transmission speed of the circuit board goods in described reflow stove according to the length of described reflow stove and described production cycle, and then calculate again according to described transmission speed the time T that the circuit board goods described in a slice pass through described reflow stove.
Preferably, in the time that described circuit board goods are positioned on carrying carrier through described reflow stove, replace the length of described circuit board goods to calculate described number maximum N the length of described carrying carrier.
Preferably, described controller is connected with the knob of setting described number maximum N.
Because technique scheme is used, the present invention compared with prior art has following advantages: when the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling of the present invention can the situation such as clamp or board falling occur in reflow stove, find in time the problems referred to above and make warning, play the further effect of aggravation of clamp or board falling that prevents, can avoid the abnormal problem of reflow soldering of bringing due to clamp or board falling, thereby can ensure the dependability of circuit board goods and reduce production costs.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment mono-: a kind of prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling, be applied in the surface mount process of circuit board production of articles, be specially in reflow soldering processing procedure, to prevent that the situation of clamp or board falling from appearring in circuit board goods in time soldering furnace that carries out reflow soldering.
Reflow stove is a heater, and it has power circuit board goods and enters front end wherein and power circuit board goods by the rear end of wherein exporting. And the last station of reflow stove is provided with the conveying device of delivery circuit slab products wherein, this conveying device has a track that runs through from front to back reflow stove conventionally, circuit board goods are along this orbit transports, or when circuit board goods are positioned on carrying carrier again along this orbit transports.
The prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling comprises two inductors of the controller that is provided with control program and can exports control signal, sensor circuit slab products, is connected and two counters that circuit board goods are counted, is connected and inductor is sensed to the warning device that the moment of circuit board goods carries out the timer of timing, is connected with controller respectively with two inductors respectively with two inductors.
In such scheme, controller adopts PLC controller, and it also connects with signal with conveying device. Two inductors are arranged at respectively the front-end and back-end of reflow stove, and the counter and the timer that are connected with the inductor of front end that is positioned at reflow stove become one mutually; The counter and the counter that are connected with the inductor of rear end that is positioned at reflow stove become one mutually. And warning device includes but not limited to sounding alarm device or light emission alarm device, the actual production environment of can living apart is selected, and this warning device is provided with reset key.
The prevention method that the above-mentioned prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling adopts is as follows: it comprises the first precedence scheme, the second precedence scheme and the 3rd precedence scheme.
The first precedence scheme comprises: (1) calculates or set the number maximum N of enterable circuit board goods in reflow stove. In reflow stove, the number maximum N of enterable circuit board goods is by following process computation: calculate number maximum N according to the length of the length of reflow stove and circuit board goods or according to the production cycle of actual production process; When circuit board goods are positioned on carrying carrier during through Overwelding and rewelding furnace, replace the length of circuit board goods to calculate number maximum N the length of carrying carrier. And the setting of number maximum N can realize by connect a knob at controller. (2) respond to respectively the circuit board goods through the front-end and back-end of Overwelding and rewelding furnace by two inductors, and obtain entering the number S3 of the circuit board goods in reflow stove and the number S4 by the circuit board goods of exporting in reflow stove to carrying out counting respectively by two counters. (3) relatively enter the number S3 of the circuit board goods in reflow stove and the number maximum N by enterable circuit board goods in the difference S3-S4 of the number S4 of the circuit board goods of exporting in reflow stove and reflow stove by controller: if when S3-S4=N, controller to conveying device send make into plate waiting signal to be conveyed enter the circuit board goods of reflow stove enter into plate wait state, now conveying device is failure to actuate; If when S3-S4 > N, the quantity that circuit board goods in reflow stove are described is too much, and clamp or board falling have occurred, and controller sends alarm signal and warning device is reported to the police to warning device, now, conveying device is also failure to actuate; If when S3-S4 < N, controller sends and wants partitioned signal and conveying device is prepared to delivery circuit slab products in reflow stove to conveying device, and prevention method is carried out the second precedence scheme.
The second precedence scheme comprises: 1. calculate the time T of a slice circuit board goods through Overwelding and rewelding furnace. A slice circuit board goods through the time T of Overwelding and rewelding furnace by following process computation: calculate the transmission speed of the circuit board goods in reflow stove according to the length of reflow stove and production cycle, and then calculate again the time T of a slice circuit board goods through Overwelding and rewelding furnace according to transmission speed. 2. respond to respectively a slice circuit board goods through the front-end and back-end of Overwelding and rewelding furnace by two inductors, and carry out respectively timing by two timers and obtain the moment T4 that a slice circuit board goods enter the moment T3 of reflow stove and exported by reflow stove. 3. the moment T4 being exported by reflow stove by controller comparison a slice circuit board goods and enter the difference T4-T3 of moment T3 of reflow stove and a slice circuit board goods through the time T of Overwelding and rewelding furnace: if when T4-T3≤T, controller continues to carry out the first precedence scheme, be that controller sends and wants partitioned signal to conveying device, conveying device is prepared to continue transporting circuit board goods in reflow stove; If when T4-T3 > T, the overlong time of circuit board goods in reflow stove is described, there is clamp or board falling problem, controller sends alarm signal and warning device is reported to the police and stop transmission to want partitioned signal to warning device.
The 3rd precedence scheme is carried out in the time of S3-S4 < N and T4-T3≤T. The 3rd precedence scheme comprises that conveying device is to before reflow stove delivery circuit slab products, after time delay t, again circuit board goods are delivered in reflow stove, time delay t is adjustable value, also can arrange by knob, conventionally this time delay t can be set to circuit board goods or carrying carrier double length compare transmission speed.
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this. All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. one kind prevents the prevention system of circuit board goods clamp in reflow soldering processing procedure or board falling, be applied in the surface mount process of circuit board production of articles, to prevent that the situation of clamp or board falling from appearring in described circuit board goods in the reflow stove that carries out reflow soldering, described reflow stove and accessory has the described circuit board goods of confession enter front end wherein and supply described circuit board goods by the rear end of wherein exporting, and the last station of described reflow stove is provided with the conveying device of carrying wherein described circuit board goods, it is characterized in that: it comprises the controller that is provided with control program and can exports corresponding control signal, two inductors of the circuit board goods described in induction, two counters that are connected and described circuit board goods are counted with the inductor described in two respectively, be connected with the inductor described in two respectively and described inductor is sensed to the timer that the moment of described circuit board goods is carried out timing, the warning device being connected with described controller, described controller also connects with signal with described conveying device, and the inductor described in two is arranged at respectively the front-end and back-end of described reflow stove.
2. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 1, is characterized in that: described controller is PLC controller.
3. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 1, is characterized in that: the timer described in the counter described in be connected with the described inductor of front end that is positioned at described reflow stove and becomes one mutually; Counter described in be connected with the described inductor of rear end that is positioned at described reflow stove one and the timer described in another become one mutually.
4. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 1, is characterized in that: described warning device comprises sounding alarm device or light emission alarm device.
5. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 1, is characterized in that: its prevention method adopting comprises the first precedence scheme and the second precedence scheme;
The first described precedence scheme comprises: (1) calculates or set the number maximum N of enterable circuit board goods in described reflow stove, (2) respond to respectively the described circuit board goods through the front-end and back-end of described reflow stove by the inductor described in two, and obtain entering the number S3 of the described circuit board goods in described reflow stove and the number S4 by the described circuit board goods of exporting in described reflow stove to carrying out counting respectively by the counter described in two, (3) relatively enter the number S3 of the described circuit board goods in described reflow stove and the number maximum N by enterable circuit board goods in the difference S3-S4 of the number S4 of the described circuit board goods of exporting in described reflow stove and described reflow stove by described controller: if when S3-S4=N, described controller to described conveying device send make into plate waiting signal to be conveyed enter the circuit board goods of described reflow stove enter into plate wait state, if when S3-S4 > N, described controller sends alarm signal and described warning device is reported to the police to described warning device, if when S3-S4 < N, described controller sends and wants partitioned signal and described conveying device is prepared to delivery circuit slab products in described reflow stove to described conveying device, and described prevention method is carried out the second precedence scheme,
The second described precedence scheme comprises: 1. calculate circuit board goods described in a slice time T through described reflow stove; 2. respond to respectively through the circuit board goods described in a slice of the front-end and back-end of described reflow stove by the inductor described in two, and carry out respectively by the timer described in two the circuit board goods that timing obtains described in a slice and enter the moment T3 of described reflow stove and the moment T4 by described reflow stove output; 3. by the circuit board goods described in described controller comparison a slice by the moment T4 of described reflow stove output with enter the time T that the circuit board goods described in difference T4-T3 and a slice of moment T3 of described reflow stove pass through described reflow stove: if when T4-T3≤T, described controller continues to carry out the first described precedence scheme, if when T4-T3 > T, described controller sends alarm signal and described warning device is reported to the police and stop sending the described partitioned signal of wanting to described warning device.
6. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 5, it is characterized in that: described prevention method also comprises the 3rd precedence scheme of carrying out in the time of S3-S4 < N and T4-T3≤T, the 3rd described precedence scheme comprises that described conveying device, to before described reflow stove delivery circuit slab products, is delivered to described circuit board goods in described reflow stove after time delay t again.
7. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 6, is characterized in that: described time delay t is adjustable value.
8. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 5, is characterized in that: in described reflow stove, the number maximum N of enterable circuit board goods is by following process computation: calculate described number maximum N according to the length of the length of reflow stove and described circuit board goods or according to the production cycle of actual production process;
Circuit board goods described in a slice through the time T of described reflow stove by following process computation: calculate the transmission speed of the circuit board goods in described reflow stove according to the length of described reflow stove and described production cycle, and then calculate again according to described transmission speed the time T that the circuit board goods described in a slice pass through described reflow stove.
9. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 8, it is characterized in that: in the time that described circuit board goods are positioned on carrying carrier through described reflow stove, replace the length of described circuit board goods to calculate described number maximum N the length of described carrying carrier.
10. the prevention system that prevents circuit board goods clamp in reflow soldering processing procedure or board falling according to claim 5, is characterized in that: described controller is connected with the knob of setting described number maximum N.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310486180.4A CN103635033B (en) | 2013-10-17 | 2013-10-17 | Prevent the prevention system of circuit board goods clamp in reflow soldering processing procedure or board falling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310486180.4A CN103635033B (en) | 2013-10-17 | 2013-10-17 | Prevent the prevention system of circuit board goods clamp in reflow soldering processing procedure or board falling |
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| CN103635033A CN103635033A (en) | 2014-03-12 |
| CN103635033B true CN103635033B (en) | 2016-05-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6095403A (en) * | 1999-01-22 | 2000-08-01 | International Business Machines Corporation | Circuit board component retention |
| CN101715289A (en) * | 2008-09-30 | 2010-05-26 | 富士通株式会社 | Substrate manufacturing system |
| CN202306625U (en) * | 2011-08-17 | 2012-07-04 | 深圳市劲拓自动化设备股份有限公司 | Internal memory board indicator for reflow soldering furnace |
| CN103123569A (en) * | 2011-11-18 | 2013-05-29 | 西安中科麦特电子技术设备有限公司 | Operation interface of reflow welding machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3420296B2 (en) * | 1993-09-24 | 2003-06-23 | 株式会社タムラ製作所 | Workpiece detection method in soldering equipment |
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2013
- 2013-10-17 CN CN201310486180.4A patent/CN103635033B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6095403A (en) * | 1999-01-22 | 2000-08-01 | International Business Machines Corporation | Circuit board component retention |
| CN101715289A (en) * | 2008-09-30 | 2010-05-26 | 富士通株式会社 | Substrate manufacturing system |
| CN202306625U (en) * | 2011-08-17 | 2012-07-04 | 深圳市劲拓自动化设备股份有限公司 | Internal memory board indicator for reflow soldering furnace |
| CN103123569A (en) * | 2011-11-18 | 2013-05-29 | 西安中科麦特电子技术设备有限公司 | Operation interface of reflow welding machine |
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