Reflow Oven

Abstract

The present application proposes a reflow soldering system, comprising: a reflow soldering part, for soldering materials, the reflow soldering part comprising an inlet and an outlet; a conveying part, connecting the outlet and the inlet of the reflow soldering part, for conveying the materials; an outlet identifier, arranged at the outlet, for identifying the materials when the materials pass through; a diversion identifier, arranged on the conveying part, for identifying the materials when the materials pass through; a control unit, electrically connected to the outlet identifier and the diversion identifier, for adding one to the current reflow times of the materials when the outlet identifier identifies the materials once, and for comparing the current reflow times with the preset total reflow times when the diversion identifier identifies the materials once, and controlling the materials to be conveyed to the inlet for continued reflow or receiving the materials according to the comparison results.

Description

Technical Field

[0001] The present application relates to the field of reflow soldering, and in particular to a reflow soldering system. Background Art

[0002] At present, during the reflow soldering process of materials such as PCB boards, operators are usually required to manually record the number of reflow soldering of the material, and only when the number of reflow soldering of the material reaches the required total number of reflow soldering can the reflow soldering be stopped and the material can be collected. When the number of reflow soldering of the material does not reach the required total number of reflow soldering, the material needs to be transferred to the soldering equipment for further soldering. Obviously, the manual recording of the number of reflow soldering and manual judgment is very prone to errors and inefficient. Summary of the invention

[0003] In view of this, it is necessary to provide a reflow soldering system that can automatically record the number of times the material is reflowed and determine whether the material is collected or reflowed.

[0004] A reflow soldering system provided in one embodiment of the present application includes: a reflow soldering part for soldering materials, the reflow soldering part including an inlet and an outlet; a conveying part connecting the inlet and the outlet of the reflow soldering part for conveying the materials; an outlet identifier disposed at the outlet for identifying the materials as the materials pass through; a diversion identifier disposed on the conveying part for identifying the materials as the materials pass through; a control unit electrically connected to the outlet identifier and the diversion identifier for adding one to a current reflow count of the materials when the outlet identifier identifies the materials once, and comparing the current reflow count with a preset total reflow count when the diversion identifier identifies the materials once, and controlling the materials to be conveyed to the inlet for continued reflow or receiving the materials according to the comparison result.

[0005] Optionally, the reflow soldering system also includes a carrier, which is used to carry the material. The carrier is provided with an identification code, and the identification code forms a binding relationship with the material carried on the carrier. The outlet identifier and the diversion identifier are used to identify the identification code and then identify the material on the carrier.

[0006] Optionally, the control unit is further configured to release the binding relationship between the identification code and the material carried on the carrier when the material carried on the carrier is collected.

[0007] Optionally, the reflow soldering system also includes an entrance identifier and an alarm unit, wherein the entrance identifier is arranged at the entrance and electrically connected to the control unit, and the entrance identifier is used to identify the material when the material passes through; the control unit is electrically connected to the alarm unit, and the control unit is used to record the material's time in the furnace from zero when the entrance identifier identifies the material once, and compare the time in the furnace with a preset maximum welding time. The control unit is also used to activate the alarm unit when the time in the furnace reaches the maximum welding time and the material has not yet flowed out of the reflow portion.

[0008] Optionally, the reflow soldering system further comprises a material unloading section, which is disposed between the diversion identifier and the inlet, and is used for collecting the material when the current reflow times are equal to the total reflow times.

[0009] Optionally, the reflow soldering system also includes a buffer, which is arranged on the conveying part and located between the diversion identifier and the unloading part. The buffer is used to collect the material when the unloading part is fully loaded or the material between the entrance and the buffer is congested.

[0010] Optionally, the reflow soldering system further comprises a cooling device, and the cooling device is arranged on the conveying part to cool the material.

[0011] Optionally, the conveying part has several corners, and the reflow soldering system also includes a corner machine, which is arranged at each corner. Each corner machine is provided with a position sensor, and the position sensor is used to start the corner machine when sensing the passing of the material to change the conveying direction of the material.

[0012] Optionally, the reflow soldering system further comprises a loading portion, which is connected to the inlet and is used for loading the material.

[0013] Optionally, the control unit is further configured to record the time when the material is removed from the furnace when the outlet identifier identifies the material once.

[0014] Compared with the prior art, the present application has at least the following beneficial effects: by setting a control unit, the current reflow times and the total reflow times of the material are recorded. Through the cooperation of the outlet identifier, the diversion identifier and the control unit, the automatic counting of the current reflow times and the automatic judgment of the material receiving or reflow are realized, thereby improving the efficiency of reflow soldering. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1Schematic diagram of a module of a reflow soldering system according to an embodiment of the present application.

[0016] Figure 2 It is a schematic diagram of the structure of the reflow soldering system according to the embodiment of the present application.

[0017] Figure 3 Another schematic diagram of the structure of the reflow soldering system according to the embodiment of the present application.

[0018] Main component symbols

[0019] Reflow System 1000

[0020] Reflow section 100

[0021] Entrance 110

[0022] Entry Identifier 111

[0023] Exit 120

[0024] Exit Identifier 121

[0025] Transmission unit 200

[0026] First conveying unit 201

[0027] Second conveying unit 202

[0028] The third conveying unit 203

[0029] Fourth conveying unit 204

[0030] Shunt Identifier 210

[0031] Cache 220

[0032] Cooling device 230

[0033] Corner machine 240

[0034] First corner machine 241

[0035] Second corner machine 242

[0036] The third corner machine 243

[0037] Fourth corner machine 244

[0038] Maintenance channel 250

[0039] Control unit 300

[0040] Alarm unit 400

[0041] Unloading section 500

[0042] Loading section 600

[0043] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0044] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific implementations. It should be noted that the implementations of the present application and the features in the implementations can be combined with each other without conflict.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present application. The described implementations are only part of the implementations of the present application, not all of the implementations. Based on the implementations in the present application, all other implementations obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0047] See also Figure 1 and Figure 2 The present application provides a reflow soldering system 1000 for performing reflow soldering of materials. The reflow soldering system 1000 at least includes: a reflow soldering unit 100, an outlet identifier 121, a conveying unit 200, a diversion identifier 210 and a control unit 300.

[0048] The reflow section 100 is used to weld the material. The reflow section 100 may be a nitrogen reflow furnace. Figure 2 As shown, the reflow portion 100 includes an inlet 110 and an outlet 120 .

[0049] In one embodiment, the conveying portion 200 is substantially U-shaped, with two ends thereof respectively connected to the outlet 120 and the inlet 110 of the reflow portion 100 for conveying the material, and substantially forming a U-shaped structure with the reflow portion 100 .

[0050] The outlet identifier 121 is disposed at the outlet 120 , and is used to identify the material once when the material flows out of the outlet 120 of the reflow portion 100 , so as to obtain identification data of the material.

[0051] The diversion identifier 210 is disposed on the conveying part 200 and located between two ends of the conveying part 200. The diversion identifier 210 is used to identify the material again after the material flows out from the outlet 120 of the reflow part 100 to obtain identification data of the material.

[0052] The control unit 300 is electrically connected to the outlet identifier 121 and the diversion identifier 210. The control unit 300 is used to calculate the current number of reflows of the material when the outlet identifier 121 identifies the material once, for example, to count the current number of reflows plus one. The control unit 300 is also used to obtain the identification data of the diversion identifier 210 (for example, the identification code of the material) after the diversion identifier 210 identifies the material, and then obtain the current number of reflows of the corresponding material according to the identification data of the diversion identifier 210, and compare the current number of reflows with the preset total number of reflows, and determine whether to collect or reflow according to the comparison result. For example, when the control unit 300 determines that the current number of reflows of the material is less than the total number of reflows, the material is controlled to be transferred to the inlet 110 to continue to reflow, so as to weld the material again. When the control unit 300 determines that the current number of reflows of the material is equal to the total number of reflows, the material is controlled to be collected.

[0053] Obviously, by setting the outlet identifier 121, the diverter identifier 210 and the control unit 300, through the cooperation of the outlet identifier 121, the diverter identifier 210 and the control unit 300, the automatic counting of the current reflow times of the material and the automatic judgment of whether to collect the material or reflow can be realized, thereby effectively improving the efficiency of reflow soldering.

[0054] It can be understood that, as described above, each of the materials may be provided with a first identification code, and the first identification code may be, for example, a QR code. The outlet identifier 121 and the diversion identifier 210 may directly identify the first identification code on the material to identify the material, and then obtain identification data (such as a QR code) of the material.

[0055] It can be understood that in some other embodiments, the first identification code may not be set on the material, or the first identification code is not used for identification by the outlet identifier 121 and the diversion identifier 210. Correspondingly, in other embodiments, the reflow soldering system 1000 also includes: a carrier (not shown). The carrier is used to carry the material. A second identification code (such as a QR code) is set on the carrier, and the second identification code is bound to the material carried on the carrier for identification by the outlet identifier 121 and the diversion identifier 210, so as to obtain the identification data of the material on the carrier.

[0056] It can be understood that the materials on the same carrier can be from the same batch or different batches, but the materials carried on the same carrier have the same total number of refluxes. Since the materials are placed on the carrier for reflux at the same time, the materials carried on the same carrier also have the same current number of refluxes. The control unit 300 is used to obtain the identification data (such as the second identification code) of the diverter identifier 210 after the diverter identifier 210 identifies the carrier, and then obtain the current number of refluxes of the corresponding material on the carrier according to the identification data of the diverter identifier 210, and compare the current number of refluxes with the preset total number of refluxes, and determine whether to collect or reflux the material on the carrier based on the comparison result. The specific judgment steps are similar to those above and will not be repeated.

[0057] By setting the second identification code on the carrier and binding the carrier with the corresponding material through the second identification code, it is possible to avoid the outlet identifier 121 and the diversion identifier 210 from having to identify the first identification code on each material, thereby avoiding the situation where the first identification code is misidentified or cannot be identified, and improving the efficiency of the automated operation of the reflow soldering system 1000.

[0058] It can be understood that the control unit 300 is also used to release the binding relationship between the identification code and the material carried on the carrier when the material carried by the carrier is collected, so that the carrier can continue to carry other materials and bind them.

[0059] It can be understood that in other embodiments, the reflow soldering system 1000 further includes an inlet identifier 111, and the inlet identifier 111 is electrically connected to the control unit 300. The inlet identifier 111 is disposed at the inlet 110, and is used to identify the material once when the material flows into the inlet 110 of the reflow soldering unit 100, so as to obtain identification data of the material.

[0060] It can be understood that in some embodiments, the control unit 300 is also used to record the time when the material is taken out of the furnace after the exit identifier 121 completes the identification of the material. At the same time, the control unit 300 is also used to record the time when the material enters the furnace after the entrance identifier 111 completes the identification of the material, that is, cooperate with the entrance identifier 111 to record the time when the material enters the furnace, and then realize the automatic recording of the time when the material enters the furnace and the time when it exits the furnace, and can be queried in real time.

[0061] In this embodiment, please refer to Figure 1, the reflow soldering system 1000 further includes an alarm unit 400. The alarm unit 400 is electrically connected to the control unit 300. The longest soldering time of the material is also stored in the control unit 300. In this way, the control unit 300 can also obtain the time of the material in the furnace according to the time of the material entering the furnace, and compare the time in the furnace with the longest soldering time of the material, and then control the operation of the alarm unit 400 according to the comparison result. For example, when the control unit 300 determines that the time in the furnace reaches the longest soldering time, and the material has not yet flowed out of the reflow soldering part 100, the alarm unit 400 is activated.

[0062] It can be understood that by providing the alarm unit 400 and monitoring the time the material is in the furnace, it is possible to avoid the material being in the reflow section 100 for a long time due to a jam in the reflow section 100, thereby preventing the material from being damaged.

[0063] It is understood that each time the inlet identifier 111 performs an identification, the in-furnace time will be reset, that is, the control unit 300 starts timing from zero. The in-furnace time can be adjusted accordingly according to the streamline speed in the reflow portion 100 and the length of the reflow portion 100.

[0064] It is understandable that the entrance identifier 111 can also monitor the time the material on the carrier is in the furnace by scanning the second identification code.

[0065] See also Figure 2 In this embodiment, the reflow soldering system 1000 further includes a material unloading section 500. The material unloading section 500 is disposed between the diversion identifier 210 and the inlet 110, and is used to collect the material under the control of the control unit 300 when the current reflow times are equal to the total reflow times.

[0066] In a specific embodiment, a buffer 220 is provided on the conveying part 200. The buffer 220 is located between the diversion identifier 210 and the unloading part 500. The buffer 220 is electrically connected to the control unit 300, and is used to collect the material when the control unit 300 determines that the unloading part 500 is fully loaded and the material needs to be collected, or when the material on the rear section (i.e., from the outlet 120 to the buffer 220) is congested.

[0067] In some embodiments, the buffer 220 has a multi-layer silo and a belt structure that can be raised and lowered. The buffer 220 is also provided with a position sensor. When the buffer 220 is required to collect materials, and the material is sensed by the position sensor (i.e., reaches a predetermined position), the belt structure automatically rises and falls to place the material in an empty silo for storage, waiting for the operator to take it out. By providing the buffer 220, it is avoided that the reflow soldering system 1000 cannot collect materials normally due to the full load of the unloading section 500 or the congestion of materials in the rear section.

[0068] See also Figure 2 In some embodiments, a cooling device 230 is provided on the conveying part 200. The cooling device 230 may be, for example, an air cooling device. A plurality of cooling devices 230 may be provided at intervals to cool the material after passing through the reflow soldering part 100, so that the material quickly returns to room temperature, achieving a better reflow soldering effect.

[0069] It can be understood that the conveying part 200 may have a plurality of corners, and a corner machine 240 is provided at each of the corners. A position sensor (not shown) is provided on each of the corner machines 240. When the position sensor on the corner machine 240 senses that the material passes through, the corner machine 240 can be started to change the conveying direction of the material. The corner machine 240 can have a variety of structures, such as a belt and roller structure. The angle of the corner machine 240 can be adjusted according to the angle of the conveying part. For example, in this embodiment, the angle is 90 degrees.

[0070] It is understood that the corner turning machine 240 may be provided in plurality, for example Figure 2 As shown in , the conveying part 200 has four right-angle corners. A first corner machine 241 is provided at a corner near the entrance 110, a second corner machine 242 is provided at a corner near the exit 120, and a third corner machine 243 and a fourth corner machine 244 are provided in sequence along the transmission direction of the conveying part 200 between the second corner machine 242 and the first corner machine 241.

[0071] See also Figure 2 The reflow soldering system 1000 further includes a loading portion 600. The loading portion 600 is connected to the inlet 110 for loading the material.

[0072] See also Figure 2In this embodiment, a maintenance channel 250 is provided on the conveying part 200. When the reflow soldering system 1000 fails, maintenance personnel can open the maintenance channel 250 to enter the reflow soldering system 1000 for maintenance. It can be understood that a protective cover (not shown) can also be provided on the maintenance channel 250. When the protective cover is opened, the reflow soldering system 1000 stops, and when it is closed again, the reflow soldering system 1000 continues to operate. By providing the protective cover, it is possible to open the protective cover when an abnormality occurs in the reflow soldering system 1000, so that the reflow soldering system 1000 stops, and then adjust the position of the material or carrier.

[0073] It is understandable that Figure 2 As shown, in some embodiments, the conveying unit 200 may be directly connected to the outlet 120 and the inlet 110. Of course, in other embodiments, the conveying unit 200 may also be segmented for conveying. For example, please refer to Figure 3 The conveying part 200 may include a first conveying part 201, a second conveying part 202, a third conveying part 203 and a fourth conveying part 204. The outlet 120, the second corner machine 242, the first conveying part 201, the third corner machine 243, the second conveying part 202, the buffer machine 220, the third conveying part 203, the fourth corner machine 244, the fourth conveying part 204, the first corner machine 241 and the inlet 110 are connected in sequence, so that the material can be transported from the outlet 120 along the Figure 3 The transmission direction indicated by the middle arrow is transmitted to the inlet 110 for reflux, or is collected at the buffer machine 220 or the unloading part 500.

[0074] It can be understood that the specific number of sections of the conveying part 200 can be adjusted accordingly according to the number of the corner machines 240 or the buffer machines 220, so that the reflow soldering system 1000 can reflow and collect materials normally.

[0075] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred implementation modes, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A reflow soldering system, characterized in that: include: A reflow section, used for welding materials, the reflow section comprising an inlet and an outlet; A conveying part, connected to the outlet and the inlet of the reflow part, for conveying the material; An exit identifier, disposed at the exit, for identifying the material as it passes through; A diversion identifier is provided on the conveying part to identify the material when the material passes through; A control unit is electrically connected to the outlet identifier and the diversion identifier, and is used to count the current reflux times of the material by adding one when the outlet identifier identifies the material once, and to compare the current reflux times with the preset total reflux times when the diversion identifier identifies the material once, and to control the material to be transferred to the inlet for continued reflux or to be collected according to the comparison result.

2. The reflow soldering system according to claim 1, wherein: The reflow soldering system also includes a carrier, which is used to carry the material. An identification code is set on the carrier, and the identification code forms a binding relationship with the material carried on the carrier. The outlet identifier and the diversion identifier are used to identify the identification code and then identify the material on the carrier.

3. The reflow soldering system according to claim 2, characterized in that: The control unit is further used to release the binding relationship between the identification code and the material carried on the carrier when the material carried on the carrier is collected.

4. The reflow soldering system according to claim 1, wherein: The reflow soldering system also includes an entry identifier and an alarm unit. The entrance identifier is disposed at the entrance and is electrically connected to the control unit, and the entrance identifier is used to identify the material when the material passes through; The control unit is electrically connected to the alarm unit. The control unit is used to record the time the material has been in the furnace from zero when the entrance identifier identifies the material once, and compare the time the material has been in the furnace with a preset maximum welding time. The control unit is also used to activate the alarm unit when the time the material has been in the furnace reaches the maximum welding time and the material has not yet flowed out of the reflow portion.

5. The reflow soldering system according to claim 1, wherein: The reflow soldering system further comprises a material unloading portion, which is arranged between the diversion identifier and the inlet, and is used for collecting the material when the current reflow times are equal to the total reflow times.

6. The reflow soldering system according to claim 5, characterized in that: The reflow soldering system also includes a buffer, which is arranged on the conveying part and located between the diversion identifier and the unloading part. The buffer is used to collect the material when the unloading part is fully loaded or the material between the entrance and the buffer is congested.

7. The reflow soldering system according to claim 1, wherein: The reflow soldering system further comprises a cooling device, which is arranged on the conveying part and is used for cooling the material.

8. The reflow soldering system according to claim 1, wherein: The conveying part has several corners, and the reflow soldering system also includes a corner machine, which is arranged at each corner. Each corner machine is provided with a position sensor, and the position sensor is used to start the corner machine when sensing the passing of the material to change the conveying direction of the material.

9. The reflow soldering system according to claim 1, wherein: The reflow soldering system further comprises a loading portion, which is connected to the inlet and is used for loading the material.

10. The reflow soldering system according to claim 1, wherein: The control unit is also used to record the time when the material is removed from the furnace when the outlet identifier identifies the material once.

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