CN103635033A - System for preventing finished circuit boards from being stuck or falling in reflow process - Google Patents
System for preventing finished circuit boards from being stuck or falling in reflow process Download PDFInfo
- Publication number
- CN103635033A CN103635033A CN201310486180.4A CN201310486180A CN103635033A CN 103635033 A CN103635033 A CN 103635033A CN 201310486180 A CN201310486180 A CN 201310486180A CN 103635033 A CN103635033 A CN 103635033A
- Authority
- CN
- China
- Prior art keywords
- circuit board
- reflow
- board goods
- goods
- reflow stove
- 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.)
- Granted
Links
Abstract
The invention relates to a system for preventing finished circuit boards from being stuck or falling in reflow process in the surface mounting process for producing the finished circuit boards. The system comprises a controller, two sensors, two counters, timers and an alarm device, wherein the controller is provided with control programs and can be used for outputting a control signal; the sensors are used for sensing finished circuit boards; the counters are connected with the sensors respectively and are used for counting the finished circuit boards; timers are connected with the sensors and are used for timing moments when the finished circuit boards are sensed by the sensors; the alarm device is connected with the controller; the controller is further connected with a conveying device through a signal; the sensors are arranged at the front end and the back end of a reflow oven respectively. According to the system, the situations of board sticking or falling and the like in the reflow oven can be found immediately, and an alarm is triggered, so that further aggravation of board sticking or falling is prevented, the problem of abnormal reflow caused by board sticking or falling can be solved, the use reliability of the finished circuit boards can be ensured, and the production cost is reduced.
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), by patch device, part is mounted on the position of appointment 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 when circuit board goods enter wherein, return its server; and product by its track (Conveyor) velocity simulate pass through image; but the truths such as clamp that it causes in the time of cannot overcoming because of abnormal cause or unexpected abnormality; especially when 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 and a kind ofly 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 carrying out time soldering furnace of 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 that induction is described, two counters that are connected and described circuit board goods are counted with inductor described in two respectively, be connected and described inductor is sensed to the timer that the moment of described circuit board goods is carried out timing with the inductor described in two respectively, 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 that is positioned at the front end of described reflow stove and becomes one mutually; Counter described in counter described in be connected with the described inductor that is positioned at the rear end of 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) by the inductor described in two, respond to respectively the described circuit board goods through the front-end and back-end of described reflow stove, and respectively execution is counted the number S4 of the described circuit board goods that obtain entering the number S3 of the described circuit board goods in described reflow stove and export by the counter described in two in described reflow stove, (3) by described controller, relatively enter the number S3 of the described circuit board goods in described reflow stove and the difference S3-S4 of the number S4 of the described circuit board goods exported in described reflow stove and described reflow stove in the number maximum N of enterable circuit board goods: if during S3-S4=N, described controller sends and into plate waiting signal, makes the circuit board goods that enter described reflow stove to be conveyed enter into plate wait state to described conveying device, if during S3-S4 > N, described controller sends alarm signal and described warning device is reported to the police to described warning device, if during 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 through the time T of described reflow stove; 2. by the inductor described in two, respond to respectively through the circuit board goods described in a slice of the front-end and back-end of described reflow stove, and carry out respectively that timing obtains that circuit board goods described in a slice enter the moment T3 of described reflow stove and by the moment T4 of described reflow stove output by the timer described in two; 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 difference T4-T3 and the circuit board goods described in a slice of the moment T3 of described reflow stove pass through described reflow stove: if during T4-T3≤T, described controller continues to carry out the first described precedence scheme, if during 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 when 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: 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, calculate described number maximum N;
Circuit board goods described in a slice through the time T of described reflow stove by following process computation: according to the length of described reflow stove and described production cycle, calculate the transmission speed of the circuit board goods in described reflow stove, 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, when 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 situations 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 guarantee the dependability of circuit board goods and reduce production costs.
Embodiment
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 carrying out time soldering furnace of 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 and is provided with control program and can exports the controller of control signal, two inductors of sensor circuit slab products, be connected and two counters that circuit board goods are counted, be 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 that is positioned at the front end of reflow stove become one mutually; The counter and the counter that are connected with the inductor that is positioned at the rear end of 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: according to the length of the length of reflow stove and circuit board goods or according to the production cycle of actual production process, calculate number maximum N; 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) by two inductors, respond to respectively the circuit board goods through the front-end and back-end of Overwelding and rewelding furnace, and respectively execution is counted the number S4 of the circuit board goods that obtain entering the number S3 of the circuit board goods in reflow stove and export by two counters in reflow stove.(3) by controller, relatively enter the number S3 of the circuit board goods in reflow stove and the difference S3-S4 of the number S4 of the circuit board goods exported in reflow stove and reflow stove in the number maximum N of enterable circuit board goods: if during S3-S4=N, controller sends and into plate waiting signal, makes the circuit board goods that enter reflow stove to be conveyed enter into plate wait state to conveying device, and now conveying device is failure to actuate; If during 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 during 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 a slice circuit board goods through the time T of Overwelding and rewelding furnace.A slice circuit board goods through the time T of Overwelding and rewelding furnace by following process computation: according to the length of reflow stove and production cycle, calculate the transmission speed of the circuit board goods in reflow stove, and then calculate again a slice circuit board goods through the time T of Overwelding and rewelding furnace according to transmission speed.2. by two inductors, respond to respectively a slice circuit board goods through the front-end and back-end of Overwelding and rewelding furnace, and by two timers, carry out respectively timing and obtain a slice circuit board goods and enter the moment T3 of reflow stove and the moment T4 being 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 during 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 during 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 when 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. a 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 carrying out time soldering furnace of 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 that induction is described, two counters that are connected and described circuit board goods are counted with inductor described in two respectively, be connected and described inductor is sensed to the timer that the moment of described circuit board goods is carried out timing with the inductor described in two respectively, 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 that is positioned at the front end of described reflow stove and becomes one mutually; Counter described in counter described in be connected with the described inductor that is positioned at the rear end of described reflow stove one and one becomes 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 includes but not limited to 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) by the inductor described in two, respond to respectively the described circuit board goods through the front-end and back-end of described reflow stove, and respectively execution is counted the number S4 of the described circuit board goods that obtain entering the number S3 of the described circuit board goods in described reflow stove and export by the counter described in two in described reflow stove, (3) by described controller, relatively enter the number S3 of the described circuit board goods in described reflow stove and the difference S3-S4 of the number S4 of the described circuit board goods exported in described reflow stove and described reflow stove in the number maximum N of enterable circuit board goods: if during S3-S4=N, described controller sends and into plate waiting signal, makes the circuit board goods that enter described reflow stove to be conveyed enter into plate wait state to described conveying device, if during S3-S4 > N, described controller sends alarm signal and described warning device is reported to the police to described warning device, if during 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 through the time T of described reflow stove; 2. by the inductor described in two, respond to respectively through the circuit board goods described in a slice of the front-end and back-end of described reflow stove, and carry out respectively that timing obtains that circuit board goods described in a slice enter the moment T3 of described reflow stove and by the moment T4 of described reflow stove output by the timer described in two; 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 difference T4-T3 and the circuit board goods described in a slice of the moment T3 of described reflow stove pass through described reflow stove: if during T4-T3≤T, described controller continues to carry out the first described precedence scheme, if during 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 when 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: 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, calculate described number maximum N;
Circuit board goods described in a slice through the time T of described reflow stove by following process computation: according to the length of described reflow stove and described production cycle, calculate the transmission speed of the circuit board goods in described reflow stove, 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: when 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.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103635033A true CN103635033A (en) | 2014-03-12 |
| CN103635033B CN103635033B (en) | 2016-05-25 |
Family
ID=50215509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310486180.4A Active 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103635033B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0791911A (en) * | 1993-09-24 | 1995-04-07 | Tamura Seisakusho Co Ltd | Detection method for work in soldering device |
| 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 |
-
2013
- 2013-10-17 CN CN201310486180.4A patent/CN103635033B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0791911A (en) * | 1993-09-24 | 1995-04-07 | Tamura Seisakusho Co Ltd | Detection method for work in soldering device |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103635033B (en) | 2016-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9545045B2 (en) | Component mounting device and product-type switching method | |
| CN103635033B (en) | Prevent the prevention system of circuit board goods clamp in reflow soldering processing procedure or board falling | |
| CN105522249B (en) | A kind of pcb board week rotation control apparatus and method | |
| CN102211237A (en) | Soldering apparatus | |
| CN206122193U (en) | Weighing and removing machine | |
| CN201446319U (en) | Detecting and monitoring instrument of full-automatic screw machine | |
| CN202498280U (en) | Time control alarm system for electric iron | |
| CN103231139A (en) | Intelligent reflow soldering system | |
| CN206847469U (en) | A kind of sensor-type acousto-optic system simulation Single-soldier system of pectination | |
| CN106764568B (en) | A kind of LED light bar cooling system | |
| CN203238007U (en) | Plug-adding anomaly detection system for plug-adding machine and plug-adding machine | |
| CN204954077U (en) | Attack tooth machine in integral type mould | |
| CN202877685U (en) | Wave soldering stove timer | |
| JP2010087226A (en) | Substrate processing system, apparatus and method of managing pallet | |
| JP2007331923A (en) | Terminal system | |
| CN204603515U (en) | A kind of full automatic pcb board wicking equipment | |
| CN202306625U (en) | Internal memory board indicator for reflow soldering furnace | |
| JP2018124848A (en) | Production management device and production state display method | |
| CN101188929B (en) | A method for preventing BGA welding from being invalid | |
| CN215912299U (en) | Circuit board processing device | |
| CN208050406U (en) | A kind of Novel Delivery device | |
| CN102595802B (en) | Method for automatically controlling plate delivery of light-emitting diode (LED) chip mounter | |
| CN204526420U (en) | Printing equipment | |
| CN206050894U (en) | A kind of connection platform with warning and chiller for furnace rear | |
| TWI822435B (en) | Failure alarm system for wave soldering facility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |