Material inspection system and material inspection method

Abstract

The invention relates to a material inspection system and a material inspection method. The material inspection system comprises a memory, a first identification device, a controller and a notification device. A plurality of work orders are pre-stored in the memory, and the work orders comprise first matching information and basic information of required materials. The first recognition device is configured to be used for recognizing the first mark code of the product to obtain the second matching information and recognizing the second mark code of the actual material to obtain the basic information and the state information of the actual material. The controller is configured to match the product with a work order through the second matching information and the first matching information and obtain basic information of required materials, and receiving the basic information and the state information of the actual material, comparing the basic information of the actual material with the basic information of the required material to judge whether the actual material is correct or not, and judging whether the actual material is effective or not based on the state information. According to the scheme, wrong and invalid materials can be prevented from being used.

Description

Technical Field

[0001] The present invention relates to a material inspection system and a material inspection method. Specifically, the present invention relates to a system and a method for inspecting whether the materials used in the product processing process are correct and effective. Background Art

[0002] This section provides background information related to the present application which does not necessarily constitute prior art.

[0003] During product processing, it is often necessary to judge whether the materials used to process the product are correct and / or whether the materials used to process the product are effective, so as to avoid using wrong materials or the use of ineffective materials that affect the quality of the final processed product.

[0004] For example, in surface mount technology (SMT), solder paste is required. As a new type of welding material, solder paste has a certain viscosity at room temperature and can pre-stick electronic components to the predetermined position on the circuit board to be welded. At a higher welding temperature, as the solvent and some additives in the solder paste volatilize, the solder paste can permanently weld the electronic components to the circuit board to form a circuit board. When surface mounting the circuit board, different types of circuit boards may require different types of solder paste. If the solder paste is not used correctly, it will affect the quality of the final circuit board. In addition, solder paste is usually stored in a refrigerated device. When it is taken out of the refrigerated device for use, it generally needs to be warmed up for a certain period of time before it can be used. If the solder paste does not meet the requirements for the warming time, it will also affect the quality of the final circuit board. In addition, before being placed at a higher welding temperature for welding, the solder paste should not be exposed to the air for a long time. If the solder paste is exposed to the air for more than a certain period of time before welding, the solder paste will also fail. In addition, like many products, solder paste also has a limited use date. If the limited use date of the solder paste is exceeded, the solder paste will also fail. These will also affect the quality of the final circuit board.

[0005] In the existing processing, the type of solder paste, expiration date and other information are usually confirmed by manual visual inspection, and the start time of reheating and the start time of solder paste exposure to air are manually recorded in a paper form to manually monitor whether the solder paste is effective. Both manual visual inspection and manual monitoring are prone to errors, which affect the quality of the final circuit board and work efficiency. Summary of the invention

[0006] The purpose of the present invention is to solve one or more of the above-mentioned technical problems.

[0007] In particular, the object of the present invention is to provide a material inspection system and a material inspection method. Specifically, the present invention provides a system and a method for inspecting whether the materials used in the product processing process are correct and effective.

[0008] In one aspect of the present invention, a material inspection system is provided. The material inspection system includes: a memory, in which a plurality of work orders are pre-stored, the work orders containing first matching information related to a product to be processed and basic information of a required material to be used for processing the product; a first identification device, the first identification device being configured to: identify a first marking code of the product to obtain second matching information and identify a second marking code of an actual material to obtain basic information and status information of the actual material; a controller, the controller being connected to the memory and the first identification device and being configured to: receive the second matching information, match the product with one of the plurality of work orders through the second matching information and the first matching information and obtain the basic information of the required material contained in the one work order, receive the basic information and the status information of the actual material and compare the basic information of the actual material with the basic information of the required material to determine whether the actual material is correct and whether the actual material is valid based on the status information; and a notification device, the notification device being configured to output the determination result of the controller.

[0009] The material inspection system provided by the present invention can automatically compare the basic information of the actual material used to process the product to be processed with the basic information of the required material needed to process the product through a controller to verify whether the actual material is correct, thereby avoiding the use of wrong materials. In addition, the material inspection system provided by the present invention can also inspect whether the actual material is effective, avoiding the use of invalid actual materials and affecting the quality of the processed product. Moreover, compared with the known manual visual comparison and manual inspection, the efficiency is improved and the error rate is reduced.

[0010] Optionally, the controller is further configured to: when determining that the actual material is correct and valid, associate the basic information and the status information of the actual material with the first marking code. In this way, the information of the actual material used on the product can be identified by identifying the first marking code of the product in the future, so the actual material can be traced by identifying the first marking code of the product.

[0011] Optionally, the first identification device is arranged at the starting station in the production line, and the material inspection system includes a second identification device, which is located at a subsequent station downstream of the starting station in the production line, and the second identification device is used to identify the first marking code of the product to obtain the status information of the actual material associated with the first marking code, and the controller is also configured to receive the status information obtained by the second identification device and judge whether the actual material is valid based on the status information obtained by the second identification device. In this way, at the subsequent station, the status information of the actual material associated with the first marking code can be obtained by identifying the first marking code of the product, so as to judge whether the actual material is valid based on the status information of the actual material at the subsequent station, so as to avoid using invalid actual materials at the subsequent station.

[0012] Optionally, the product is a circuit board to be soldered, and the actual material is solder paste or flux.

[0013] Optionally, the status information of the actual material includes the start time of the temperature recovery of the solder paste or the flux, the first predetermined time for temperature recovery, and / or the expiration date, and the judgment of whether the actual material is valid includes: when the distance from the start time of temperature recovery is greater than or equal to the first predetermined time, the solder paste or the flux is determined to be valid; when the distance from the start time of temperature recovery is less than the first predetermined time, the solder paste or the flux is determined to be temporarily invalid; and / or when the expiration date is exceeded, the solder paste or the flux is determined to be invalid; when the expiration date is not exceeded, the solder paste or the flux is determined to be valid. In this way, it is possible to avoid using solder paste or flux with insufficient temperature recovery time and / or avoid using solder paste / flux that has exceeded the expiration date.

[0014] Optionally, the material inspection system further includes an input device, the input device is configured to input the start time of the solder paste or the soldering flux being exposed to the air, the start time is input to be associated with the first marking code and stored in the memory; the controller is also configured to receive the start time associated with the first marking code obtained by the second recognition device identifying the first marking code and determine that the solder paste or the soldering flux is invalid when the time from the start time is greater than or equal to a second predetermined time. In this way, the time that the solder paste or the soldering flux is exposed to the air can be monitored to avoid using solder paste or soldering flux that has been exposed to the air for too long and has become invalid.

[0015] Optionally, the first identification device can also obtain the temperature recovery number information arranged in sequence according to the temperature recovery start time by identifying the second marking code, and the controller is further configured to receive the temperature recovery number information and notify the user through the notification device when the temperature recovery number information is not continuous with the temperature recovery number of the actual material that was previously determined to be correct and valid and stored in the memory. In this way, the solder paste or flux that recovers earlier can be used earlier.

[0016] Optionally, the basic information of the required material includes the material model and / or material batch number of the required material; and the basic information of the actual material includes the material model and / or material batch number of the actual material.

[0017] Optionally, the second matching information includes a product code and / or a product name of the product; and the first matching information includes a product code and / or a product name of the product.

[0018] Optionally, the notification device is configured to output basic information of the required material contained in the work order after the controller matches the product with the work order. In this way, it is convenient for the user to go to the designated location to take the appropriate actual material from a plurality of actual materials according to the basic information of the required material, so as to improve efficiency.

[0019] In another aspect of the present invention, a material inspection method is provided. The material inspection method is performed using a material inspection system, the material inspection system includes a memory, a first identification device, a controller and a notification device, the memory pre-stores a plurality of work orders, the work orders include first matching information related to the product to be processed and basic information of the required materials to be used to process the product, the material inspection method includes: obtaining the product, the product has a first marking code; identifying the first marking code by the first identification device to obtain second matching information; the controller receives the second matching information, matches the product with one of the plurality of work orders through the second matching information and the first matching information and obtains the basic information of the required materials contained in the one work order; obtains the actual material, the actual material has a second marking code; identifies the second marking code by the first identification device to obtain the basic information and status information of the actual material; and the controller receives the basic information and status information of the actual material, compares the basic information of the actual material with the basic information of the required material to determine whether the actual material is correct and whether the actual material is valid based on the status information and outputs the determination result through the notification device.

[0020] The material inspection method provided by the present invention can automatically compare the basic information of the actual material used to process the product to be processed with the basic information of the required material needed to process the product through a controller to verify whether the actual material is correct, thereby avoiding the use of wrong materials. In addition, the material inspection method provided by the present invention can also inspect whether the actual material is effective, avoiding the use of invalid actual materials and affecting the quality of the processed product. Moreover, compared with the known manual visual comparison and manual inspection, the efficiency is improved and the error rate is reduced.

[0021] Optionally, the material inspection method further includes: when determining that the actual material is correct and valid, associating the basic information and the status information of the actual material with the first marking code. In this way, the information of the actual material used on the product can be identified by identifying the first marking code of the product in the future, so the actual material can be traced by identifying the first marking code of the product.

[0022] Optionally, the first identification device is arranged at the starting station in the production line, the material inspection system includes a second identification device, and the second identification device is arranged at a subsequent station downstream of the starting station in the production line, and the material inspection method includes: at the subsequent station, identifying the first marking code of the product by the second identification device to obtain the status information of the actual material associated with the first marking code; and the controller receives the status information obtained by the second identification device and judges whether the actual material is valid based on the status information obtained by the second identification device. In this way, at the subsequent station, the status information of the actual material associated with the first marking code can be obtained by identifying the first marking code of the product, so as to judge whether the actual material is valid based on the status information of the actual material at the subsequent station, so as to avoid using invalid actual materials at the subsequent station.

[0023] Optionally, the product is a circuit board to be soldered, and the actual material is solder paste or flux.

[0024] Optionally, the status information of the actual material includes the start time of the temperature recovery of the solder paste or the flux, the first predetermined time for temperature recovery, and / or the expiration date, and the judgment of whether the actual material is valid includes: when the distance from the start time of temperature recovery is greater than or equal to the first predetermined time, the solder paste or the flux is determined to be valid; when the distance from the start time of temperature recovery is less than the first predetermined time, the solder paste or the flux is determined to be temporarily invalid; and / or when the expiration date is exceeded, the solder paste or the flux is determined to be invalid; when the expiration date is not exceeded, the solder paste or the flux is determined to be valid. In this way, it is possible to avoid using solder paste or flux with insufficient temperature recovery time and / or avoid using solder paste / flux that has exceeded the expiration date.

[0025] Optionally, the material inspection system further includes an input device, and the material inspection method further includes: inputting the start time of the solder paste or the soldering flux being exposed to the air through the input device, the start time being input to be associated with the first marking code and stored in the memory; and the controller receiving the start time associated with the first marking code obtained by the second recognition device identifying the first marking code and determining that the solder paste or the soldering flux is invalid when the distance from the start time is greater than or equal to a second predetermined time. In this way, the time that the solder paste or the soldering flux is exposed to the air can be monitored to avoid using solder paste or soldering flux that has been exposed to the air for too long and has become invalid.

[0026] Optionally, the material inspection method further includes: the first identification device identifies the second marking code to obtain the temperature recovery number information arranged in sequence according to the temperature recovery start time; and the controller receives the temperature recovery number information and informs the user via the notification device when the temperature recovery number information is not continuous with the temperature recovery number of the actual material that was previously determined to be correct and valid and stored in the memory. In this way, the solder paste or flux that recovers earlier can be used earlier.

[0027] Optionally, the basic information of the required material includes the material model and / or material batch number of the required material; and the basic information of the actual material includes the material model and / or material batch number of the actual material.

[0028] Optionally, the second matching information includes a product code and / or a product name of the product; and the first matching information includes a product code and / or a product name of the product.

[0029] Optionally, the material inspection method further includes outputting basic information of the required material contained in the one work order through the notification device after the controller matches the product with the one work order. In this way, it is convenient for the user to go to the designated location to take the appropriate actual material from a plurality of actual materials according to the basic information of the required material, so as to improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The foregoing and other features and characteristics of the present application will become more apparent from the following detailed description with reference to the accompanying drawings, which are provided as examples only and are not necessarily drawn to scale. The same reference numerals are used in the drawings to indicate the same components, in which:

[0031] Figure 1 is a schematic diagram of a material inspection system according to a preferred embodiment of the present invention;

[0032] Figure 2 yes Figure 1 A schematic block diagram of a material inspection system shown in FIG.

[0033] Figure 3 yes Figure 1 and Figure 2 Schematic diagram of work orders stored in a memory of a material inspection system shown in FIG.

[0034] Figure 4 yes Figure 1 A schematic diagram of a first marking code of a circuit board to be welded is shown in FIG.

[0035] Figure 5 yes Figure 1 A schematic diagram of a solder paste can having a second marking code as shown in FIG.

[0036] Figure 6 is used Figure 1 and Figure 2 The material inspection system shown in the figure is a flow chart for inspecting whether the solder paste used in the processing of the circuit board to be soldered is correct and effective. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present invention and its application or use.

[0038] The present invention provides a material inspection system and a material inspection method. Specifically, the present invention provides a system and a method for inspecting whether the materials used in the product processing process are correct and effective. The processed product may be a circuit board to be soldered, such as a circuit board to be soldered for a hearing aid. The material may be solder paste or soldering flux. The circuit board to be soldered needs to undergo at least the following process flow: 1) a certain amount of solder paste or soldering flux is printed on the circuit board to be soldered through a steel mesh at a printing station; 2) sheet electronic components are mounted on the surface of the circuit board to be soldered at a mounting station located downstream of the printing station; and 3) the circuit board to be soldered with sheet electronic components mounted on the surface is placed at a higher soldering temperature at a soldering station (such as a reflow soldering station) located downstream of the mounting station so that the sheet electronic components are permanently soldered to the circuit board through the solder paste or soldering flux. The following will describe the material inspection system and material inspection method provided by the present invention by taking the inspection of whether the solder paste (as an example of "material") used in the processing of the circuit board to be soldered (as an example of "product to be processed") is correct and effective as an example in conjunction with the accompanying drawings. It can be understood that the material inspection system and material inspection method provided by the present invention can also be used to inspect whether other materials used in the processing of the circuit board to be soldered are correct and effective; and the material inspection system and material inspection method provided by the present invention can also be used to inspect whether the materials used in the processing of other products are correct and effective.

[0039] Figure 1 It is a schematic diagram of a material inspection system 1 according to a preferred embodiment of the present invention. Figure 2 yes Figure 1 Schematic block diagram of a material inspection system 1 is shown in FIG. Figure 3 yes Figure 1 and Figure 2 Schematic diagram of a work order 111 stored in the memory 11 of the material inspection system 1 shown in FIG. Figure 4 yes Figure 1 FIG. 1 is a schematic diagram of a first marking code 161 of a circuit board 16 to be soldered. Figure 5 yes Figure 1 Schematic diagram of a solder paste can 17 with a second marking code 171 is shown in FIG. Figure 6 is used Figure 1 and Figure 2 The material inspection system 1 shown in FIG. 1 is a flow chart for inspecting whether the solder paste used in the processing of the circuit board 16 to be soldered is correct and effective.

[0040] like Figure 1 and Figure 2As shown, in a preferred embodiment of the present invention, the material inspection system 1 mainly includes a memory 11, a scanner 12 (as an example of a "first identification device"), a controller 13, and a display 14 (as an example of a "notification device"). The memory 11 and the controller 13 can be integrated into a server 15. The controller 13 can be connected to the memory 11 to access the data stored in the memory 11. The controller 13 can also be connected to the scanner 12 and the display 14 to communicate with them. Figure 1 As shown, the controller 13 disposed in the server 15 can be connected to the scanner 12 and the display 14 through a PC terminal.

[0041] The memory 11 is pre-stored with a plurality of work orders for different products to be processed. These work orders can cover all products to be processed that can be processed in the production line. There is a one-to-one correspondence between a work order and a certain attribute of the product to be processed. For example, there is a one-to-one correspondence between the work orders pre-stored in the memory 11 and the type of the product to be processed. Specifically, in this embodiment, each of the plurality of work orders pre-stored in the memory 11 corresponds to a type of circuit board to be welded; each type of circuit board to be welded corresponds to one of the plurality of work orders pre-stored in the memory 11.

[0042] Figure 3 FIG. 1 shows a schematic diagram of a work order 111. Figure 3As shown, the work order 111 includes a unique product code and product name of the circuit board to be welded. The product name can be embodied in an abbreviation (e.g., R05). Generally speaking, the product code and the product name correspond one to one. The product code and the product name are used to match the work order 111 with the circuit board 16 to be welded obtained by the user to be described below. Therefore, in this embodiment, the product code and the product name of the circuit board to be welded contained in the work order 111 constitute the first matching information for matching the work order 111 with the circuit board 16 to be welded obtained by the user. Of course, the work order 111 may also only include the product code of the circuit board 16 to be welded or only include the product name of the circuit board 16 to be welded. In addition, in other embodiments of the present invention, the work order 111 may also include other types of matching information related to the circuit board to be welded, which is used to match the work order 111 with the circuit board 16 to be welded obtained by the user. The work order 111 stored in the memory 11 can be named with the product code or product name of the circuit board to be welded. The work order 111 also includes the various processing steps of the circuit board to be soldered and the materials required for each step. The user can process the circuit board to be soldered into a circuit board according to the process flow recorded in the work order 111. For the solder paste required to process the circuit board to be soldered targeted by the work order 111, the work order 111 includes basic information of the solder paste. This basic information can be used to check whether the actual solder paste obtained by the user to be described below is correct. The basic information of the solder paste is, for example, the model of the solder paste and / or the batch number of the solder paste.

[0043] Back to Figure 1 The scanner 12 is used to identify the first marking code 161 of the circuit board 16 to be soldered obtained by the user. The circuit board 161 to be soldered has been attached with the first marking code 161 when it is sent to the starting station (printing station in this embodiment) in the production line for operation. Figure 4 FIG. 1 shows a schematic diagram of a first marking code 161 of a circuit board 16 to be welded. Figure 4As shown, the first marking code 161 is a two-dimensional code. Of course, the first marking code 161 can also be a barcode. The scanner 12 can obtain the second matching information by identifying the first marking code 161 of the circuit board 16 to be welded, and the second matching information is used to match the first matching information contained in the work order 111 stored in the memory 11, so as to match the correct work order 111 for the circuit board 16 to be welded from the multiple work orders 111 stored in the memory 11. In this embodiment, corresponding to the first matching information, the second matching information is the product code P / N (Part Number) and / or product name of the circuit board 16 to be welded. The product name can be embodied in the form of a product code (Product code) corresponding to the abbreviation. In addition, optionally, the scanner 12 can also obtain the work order code J / N (Job Number) and product serial number of the circuit board 16 to be welded by identifying the first marking code 161 of the circuit board 16 to be welded. The product serial number and the product code representing the abbreviation of the product name can be integrated in a number P / P (Product code / Panel). Multiple circuit boards 16 to be welded of the same type have the same product code P / N and product code, but each circuit board 16 to be welded has a unique work order code J / N and product serial number. It should be noted that before the circuit board 16 to be welded is matched to the work order 111 stored in the memory 11, the work order code J / N of the circuit board 16 to be welded is independent of the work order 111 stored in the memory 11 and named with the product code of the product to be processed or the product name of the product to be processed.

[0044] The matching process of the circuit board 16 to be welded and the work order 111 stored in the memory 11 can be performed by the controller 13 connected to the memory 11 and the scanner 12. Specifically, the controller 13 receives the second matching information obtained by the scanner 12 by identifying the first marking code 161 of the circuit board 16 to be welded, and matches the circuit board 16 to be welded with one of the multiple work orders 111 through the second matching information and the first matching information related to the circuit board 16 to be welded contained in the multiple work orders 111 stored in the memory 11. For example, in this embodiment, after receiving the information of the product code and product code (corresponding to the product name) of the circuit board 16 to be welded obtained by the scanner 12 by identifying the first marking code 161 of the circuit board 16 to be welded, the controller 13 can match the circuit board 16 to be welded to the work order 111 for the same product code and product name stored in the memory 11. After matching the circuit board 16 to be welded to the correct work order 111, the controller 13 may associate the circuit board 16 to be welded with the work order 111. Table 1 below shows an example of associating the circuit board 16 to be welded with a work order.

[0045] Table 1

[0046]

[0047] The solder paste included in the work order 111 is the required material for processing the circuit board 16 to be soldered. The controller 13 can obtain basic information (such as solder paste model) of the solder paste required for processing the circuit board 16 to be soldered. Preferably, after the controller 13 matches the circuit board 16 to be soldered with one of the work orders 111 among the multiple work orders stored in the memory 11, the basic information of the solder paste to be used contained in the matched work order 111 can be output through the display 14 or other notification device (such as a speaker) connected to the controller 13 to inform the user, so as to facilitate the user to go to the designated location to take the appropriate solder paste from the plurality of solder pastes according to the basic information of the solder paste prompted, so as to improve efficiency.

[0048] like Figure 5 As shown, the solder paste taken by the user is usually placed in an unopened solder paste can 17, and the solder paste can 17 has a second marking code 171. It should be noted that the solder paste taken by the user is already in a reheated state. Usually, the staff will take out several commonly used types of solder paste from the refrigeration equipment in advance and place them at the designated position of the printing station. When the staff takes out the solder paste from the refrigeration equipment, the solder paste begins to reheat. Therefore, the staff needs to print a second marking code 171 for each solder paste when taking out the solder paste from the refrigeration equipment and attach it to the solder paste can 17. The second marking code 171 can also be a barcode or a QR code. The second marking code 171 can be recognized by the scanner 12. The scanner 12 can obtain the basic information and status information of the solder paste taken by identifying the second marking code 171. This basic information can be used to compare with the basic information of the solder paste required for processing the circuit board to be soldered contained in the work order 111 described above to confirm whether the solder paste taken is correct. This status information can be used to check whether the solder paste used is invalid. Figure 5 As shown, the basic information of the solder paste used obtained by the scanning gun 12 by identifying the second marking code 171 may include the model of the solder paste, and / or the batch number of the solder paste. The status information of the solder paste used obtained by the scanning gun 12 by identifying the second marking code 171 may include the start time of the solder paste to be warmed up, the first predetermined time for the solder paste to be warmed up, and / or the expiration date. In addition, the scanning gun 12 can also obtain the serial number of the solder paste used by identifying the second marking code 171. The batch number and serial number of the solder paste can be integrated into one number ("batch number_serial number"). Multiple solder pastes of the same type have the same solder paste model, but each can of solder paste has a unique serial number.

[0049] It should be noted that the model of solder paste, the start time of solder paste reheating, the first scheduled time for reheating and / or the expiration date obtained by the scanner 12 through identifying the second marking code 171 can be pre-stored in the memory 11 in a manner associated with the number of the solder paste. The number of the solder paste is included in the second marking code 171. The scanner 12 obtains the model of solder paste, the start time of solder paste reheating, the first scheduled time for reheating and / or the expiration date stored in the memory 11 by identifying the number information of the solder paste in the second marking code 171. Of course, the above information can also be directly included in the second marking code 171. The scanner 12 directly obtains the above information of the used solder paste by identifying the second marking code 171.

[0050] The basic information and status information of the used solder paste obtained by the scanner 12 by identifying the second marking code 171 can be received by the controller 13. Among them, the controller 13 is configured to compare the received basic information of the used solder paste with the basic information of the solder paste required for processing the circuit board to be soldered contained in the obtained matched work order 111, so as to determine whether the used solder paste is correct. For example, in this embodiment, when the controller 13 determines that the model of the used solder paste is consistent with the model of the solder paste required to be used contained in the matched work order 111, the controller 13 sends the determination result to the display 14, and the display 14 outputs a determination result such as "consistent" to inform the user that the used solder paste is the correct solder paste. When the controller 13 determines that the type of solder paste used is inconsistent with the type of solder paste to be used contained in the matched work order 111, the controller 13 sends the determination result to the display 14, and the display 14 outputs a determination result such as "inconsistent" to inform the user that the solder paste used is incorrect and needs to be replaced. The second marking code 171 on the solder paste tank 17 of the replaced solder paste is rescanned by the scanner 12, and the determination process is repeated until the type of solder paste used is consistent with the type of solder paste to be used contained in the matched work order 111. By automatically comparing the basic information of the solder paste used with the basic information of the solder paste to be used for processing the circuit board to be soldered contained in the matched work order 111, the use of the wrong solder paste can be avoided to affect the quality of the circuit board finally formed. It should be noted that even in the preferred solution, the user takes the solder paste based on the basic information of the solder paste used output by the display 14, and there is a possibility of taking it by mistake. However, this error can be completely avoided by automatic comparison through the material inspection system.

[0051] In addition, the controller 13 is further configured to determine whether the used solder paste is effective based on the received status information of the used solder paste, so as to avoid using invalid solder paste and affecting the quality of the final circuit board. Figure 5As shown, the scanning gun 12 recognizes the second marking code 171 and obtains the start time of the temperature recovery of the used solder paste and the first predetermined time for the temperature recovery, which are received by the controller 13. The controller 13 determines whether the used solder paste is invalid based on the start time of the temperature recovery of the solder paste and the first predetermined time for the temperature recovery. Specifically, when the time from the start time of the temperature recovery is greater than or equal to the first predetermined time (for example, 4 hours), it means that the temperature recovery time of the solder paste has met the requirements, and the controller 13 determines that the solder paste is valid; when the time from the start time of the temperature recovery is less than the first predetermined time (for example, 4 hours), it means that the temperature recovery time of the solder paste does not meet the requirements, and the controller 13 determines that the solder paste is temporarily invalid. In addition, as Figure 5 As shown, the expiration date of the used solder paste obtained by the scanner 12 identifying the second marking code 171 is received by the controller 13. The controller 13 determines whether the used solder paste is invalid based on the expiration date of the solder paste. Specifically, when the expiration date is exceeded, the solder paste is determined to be invalid, and when the expiration date is not exceeded, the solder paste is determined to be valid. The judgment result of the controller 13 judging whether the solder paste is valid based on the status information of the used solder paste can also be output through the display 14 to inform the user to wait or replace other solder pastes. It can be understood that when making multiple judgments on whether the solder paste is valid based on multiple status information, the controller 13 needs to integrate the results of multiple judgments, and only when the solder paste is judged to be valid based on each status information, it is finally judged that the solder paste is valid.

[0052] In a preferred embodiment of the present invention, the controller 13 is further configured to associate the used solder paste with the first marking code 161 of the circuit board 16 to be soldered when determining that the used solder paste is correct and valid. Table 2 below shows an example of associating the used solder paste with the first marking code 161 of the circuit board 16 to be soldered.

[0053] Table 2

[0054]

[0055]

[0056] If the solder paste used is determined to be correct and effective, the solder paste will be used for the circuit board 16 to be soldered. By associating the solder paste used with the circuit board 16 to be soldered, the basic information and status information of the solder paste actually used can be obtained by identifying the first marking code 161 on the circuit board 16 to be soldered through the scanner 12. Generally speaking, after the solder paste is used for processing the circuit board 16 to be soldered, the solder paste can 17 is often discarded. By associating the basic information and status information of the solder paste with the circuit board 16 to be soldered, on the one hand, the information of the solder paste used on the circuit board 16 to be soldered can be known by identifying the first marking code 161 later, so the used solder paste can be traced by identifying the first marking code 161 on the circuit board 16 to be soldered; on the other hand, in the case that the circuit board 16 to be soldered needs to undergo different process treatments at multiple stations on the production line, at the subsequent station, the status information of the actually used solder paste associated with the circuit board 16 to be soldered can be obtained by identifying the first marking code 161 of the circuit board 16 to be soldered, so as to judge whether the solder paste is effective at the subsequent station, so as to avoid using invalid solder paste at the subsequent station.

[0057] For example, in this embodiment, the scanning gun 12 is set at the printing station (i.e., the starting station). After a certain amount of correct and valid solder paste is printed on the circuit board 16 to be welded through the steel mesh at the printing station, the circuit board 16 to be welded printed with solder paste is sent to the mounting station and the welding station according to the process flow recorded in the matched work order 111. The subsequent stations such as the mounting station and the welding station are all provided with a scanning gun 18 (as an example of a "second identification device"). The scanning gun 18 is used to identify the first marking code 161 of the circuit board 16 to be welded to obtain the status information of the solder paste actually used associated with the circuit board 16 to be welded. The controller 13 is configured to receive the status information of the used solder paste obtained by the scanning gun 18 set at the subsequent stations such as the mounting station and the welding station to identify the first marking code 161 of the circuit board 16 to be welded, and judge whether the solder paste already located on the circuit board 161 to be welded is still valid based on the status information.

[0058] As mentioned above, before being placed at the soldering temperature for soldering, the solder paste will also become ineffective if it is exposed to the air for more than a certain period of time. Therefore, in a preferred embodiment of the present invention, the material inspection system 1 also includes an input device 19. The input device 19 can be a keyboard. The input device 19 is configured to be used by the user to input the start time of the solder paste being exposed to the air. The start time can be the time when the user opens the solder paste can 17 and places the solder paste on the steel mesh after the controller 13 determines that the solder paste is correct and effective. The start time is input and stored in the memory 11 in association with the first marking code 161 of the circuit board 16 to be soldered. The following table 3 shows an example of associating the start time of the solder paste being exposed to the air with the first marking code 161 of the circuit board 16 to be soldered.

[0059] Table 3

[0060]

[0061] In the subsequent operation process, the first marking code 161 of the circuit board 16 to be welded can be identified by the scanning gun 18 at the subsequent workstation, and the start time of the solder paste used on the circuit board 16 to be welded being exposed to the air can be known. After receiving the start time of the solder paste being exposed to the air associated with the first marking code 161 identified by the scanning gun 18, the controller 13 determines whether the solder paste on the circuit board 16 to be welded is still valid based on the time from the current time to the start time. Specifically, the controller 13 is configured to determine that the solder paste is invalid when the start time from the solder paste being exposed to the air is greater than or equal to the second predetermined time. The second predetermined time can be 48 hours, preferably, the second predetermined time is 24 hours, and more preferably, the second predetermined time is 8 hours. If the controller 13 determines that the solder paste is invalid, it is necessary to remove the solder paste printed on the circuit board 16 to be welded and return the circuit board 16 to be welded to the printing station to reprint the solder paste.

[0062] It should be noted that, in the actual processing, after the controller 13 determines that the solder paste is valid, the user will open the solder paste can 17 and place the solder paste on the steel mesh. If the solder paste is not completely printed on the circuit board 16 to be soldered, the excess solder paste can be recycled back to the solder paste can 17 for next use. In the case where the solder paste needs to be recycled, after the start time of the solder paste being first exposed to the air has been recorded through the input device 19, the end time of the first exposure to the air needs to be recorded through the input device 19, and the start time of the first exposure to the air and the end time of the first exposure to the air are both input and stored in the memory 11 in association with the second marking code 171 on the solder paste can 17. When the remaining solder paste in the solder paste can 17 is used next time, the start time of the first exposure to the air and the end time of the first exposure to the air that have been associated with the second marking code 171 can be associated with the first marking code 161 of the circuit board 16 to be soldered used for these solder pastes, so that the total time of the first exposure to the air together with the subsequent exposure time to the air can be calculated as the total time of exposure of these solder pastes to the air.

[0063] Preferably, in this embodiment, when the staff takes out the solder paste from the refrigeration device and prints a second marking code 171 for each solder paste, the second marking code 171 is also configured so that when the second marking code 171 is subsequently identified by the scanning gun 12, the rewarming number information arranged in sequence according to the rewarming start time of the solder paste can also be obtained. The earlier the rewarming start time of the solder paste taken out from the refrigeration device is, the smaller the rewarming number is. Preferably, the rewarming number information can be reflected in the serial number, that is, the serial number used to uniquely identify a can of solder paste in the above text can be arranged in sequence according to the rewarming start time of the solder paste. Therefore, the above serial number can also be called the rewarming serial number. Of course, the rewarming number information can also be independent of the serial number in the above text. At the printing station, the second marking code 171 of the solder paste can 17 is identified by the scanning gun 12 to obtain the above rewarming number information. The controller 13 is configured to inform the user via the display 14 when the reheating number information of the solder paste obtained by the scanner 12 identifying the second marking code 17 of the solder paste can 17 is not continuous with the reheating number information of the previous solder paste determined to be of the correct and valid solder paste type (i.e., the previous solder paste that has been used). For example, if the reheating number information obtained by the scanner 12 by identifying the first marking code 171 of the current solder paste can 17 is "5", and the reheating number information of the previous solder paste determined to be of the correct and valid solder paste type (i.e., the previous solder paste that has been used) is "3", it means that there is a solder paste with a reheating number information of "4" that has been reheated earlier than the currently identified solder paste but has not been used. After receiving the information from the display 14, the user can replace the currently identified solder paste and repeat the above verification until the reheating number information (e.g., reheating sequence number) of the replaced solder paste is continuous. In this way, the solder paste that has been reheated earlier can be used earlier.

[0064] The following will be combined Figure 6 The present invention describes an embodiment of a material inspection method for using a material inspection system to inspect whether the materials used in the product processing process are correct and effective. Figure 6 As shown, the material inspection method includes the following steps.

[0065] First, a circuit board 16 to be soldered is obtained, and the circuit board 16 to be soldered has a first marking code 161. In this embodiment, the circuit board 16 to be soldered is first sent to a printing station.

[0066] Next, the first marking code 161 of the circuit board 16 to be welded is identified by the scanner 12 at the printing station to obtain the product code of the circuit board 16 to be welded. In other embodiments, the product name of the circuit board 16 to be welded or the information of both the product code and the product name of the circuit board 16 to be welded may also be obtained.

[0067] Next, the controller 13 receives the product code of the circuit board 16 to be soldered obtained by the scanning gun 12 identifying the first marking code 161 of the circuit board 16 to be soldered, and matches the circuit board 16 to be soldered with a work order 111 for the same product code among the multiple work orders 111 stored in the memory 11, and obtains the solder paste model information of the required solder paste contained in the matched work order 111.

[0068] Next, as an optional step, the display 14 may output the solder paste model information of the required solder paste, so that the user can go to a designated location and pick up a suitable solder paste from a plurality of solder pastes according to the prompted solder paste model information, thereby improving efficiency.

[0069] Next, obtain solder paste. The solder paste is usually placed in a solder paste can 17, and a second marking code 171 is set on the solder paste can 17. In this step, the solder paste obtained by the user is the solder paste that has been taken out of the refrigeration device in advance and has been in a warmed state. When the staff takes out the solder paste from the refrigeration device, a second marking code 171 is printed for each solder paste and attached to the solder paste can 17.

[0070] Next, at the printing station, the second marking code 171 on the solder paste can 17 is identified by the scanner 12 to obtain the solder paste model information and status information of the solder paste used. The status information may include the solder paste reheating start time, the first predetermined time for reheating, and the expiration date. Optionally, the second marking code 171 on the solder paste can 17 can also be identified by the scanner 12 to obtain the reheating number information arranged in sequence according to the reheating start time of the solder paste.

[0071] The solder paste model information and status information obtained by the scanner 12 identifying the second marking code 171 on the solder paste tank 17 can be received by the controller 13. Next, the controller 13 compares the solder paste model information obtained by the scanner 12 identifying the second marking code 171 on the solder paste tank 17 with the solder paste model information of the required solder paste contained in a matched work order 111 to determine whether the solder paste model of the solder paste used is consistent with the solder paste model of the required solder paste contained in the matched work order 111. If not consistent, the display 14 outputs a "discordant" result to inform the user that the solder paste needs to be replaced and the scanner 12 re-scans the second marking code 171 on the solder paste tank 17 of the replaced solder paste, and repeats the judgment process. If consistent, the display 14 outputs a "consistent" result to inform the user that the solder paste used is the correct solder paste, and enters the next step of the process.

[0072] Next, the controller 13 determines whether the used solder paste is valid based on the state information of the solder paste obtained by identifying the second marking code 171 on the solder paste can 17 through the scanner 12. Specifically, in this embodiment, when the expiration date is exceeded, the controller 13 determines that the solder paste is invalid. At this time, the user needs to replace the solder paste and rescan the second marking code 171 on the solder paste can 17 of the replaced solder paste through the scanner 12, and repeat the above judgment process. When the expiration date of the solder paste has not been exceeded and the time from the start of the warming up is less than the first predetermined time (for example, 4 hours), the controller 13 determines that the solder paste is temporarily invalid. At this time, the user can replace the solder paste and rescan the second marking code 171 on the solder paste can 17 of the replaced solder paste through the scanner 12, and repeat the above judgment process; or wait for a certain period of time, re-identify the second marking code on the solder paste can 17 through the scanner 12, and repeat the above judgment process until the warming up time meets the requirements. When the expiration date of the solder paste has not expired and the time from the start of the temperature recovery is greater than or equal to the first predetermined time (eg, 4 hours), the controller 13 determines that the solder paste is valid and the process can proceed to the next step.

[0073] Next, as an optional step, the controller 13 determines whether the reheating number information of the solder paste received by the scanner 12 and obtained by identifying the second marking code 17 of the solder paste can 17 is continuous with the reheating number information of the previous solder paste that was determined to be of the correct and valid solder paste type (that is, the previous used solder paste). If it is not continuous, it means that there is a solder paste that has been reheated earlier than the currently identified solder paste but has not been used. The judgment result is notified to the user via the display 14. The user needs to replace the solder paste, and rescan the second marking code 171 on the solder paste can 17 of the replaced solder paste through the scanner 12, and repeat the above judgment process until the reheating number information of the replaced solder paste is continuous. In this way, the solder paste that has been reheated earlier can be used earlier. If it is continuous, the process can proceed to the next step.

[0074] Next, the solder paste can 171 is opened, the solder paste is printed on the circuit board 16 to be soldered, and the basic information, state information and start time of exposure to air of the solder paste are associated with the first marking code 161 of the circuit board 16 to be soldered, so that the information of the solder paste actually used on the circuit board 16 to be soldered can be known by identifying the first marking code 161 of the circuit board 16 to be soldered. The associated information can be stored in the memory 11. The start time of exposure of the solder paste to air can be input by the user through the input device 19 when the user opens the solder paste can 171 and stored in the memory 11 in a manner associated with the first marking code 161 of the circuit board 16 to be soldered.

[0075] Next, the circuit board 16 to be soldered printed with solder paste is sent to the mounting station according to the process flow recorded in the matched work order 111. At the mounting station, the first marking code 161 of the circuit board 16 to be soldered is identified by a scanning gun 18 to obtain the status information of the solder paste printed on the circuit board 16 to be soldered and the start time of exposure to the air associated with the first marking code 161.

[0076] Next, it is determined whether the solder paste on the circuit board 16 to be soldered is valid based on the status information of the solder paste on the circuit board 16 to be soldered and the start time of exposure to the air. Specifically, in this embodiment, when the expiration date is exceeded or the start time of exposure of the solder paste to the air is greater than or equal to the second predetermined time (for example, 48 hours, preferably 24 hours, and more preferably 8 hours), the controller 13 determines that the solder paste is invalid. At this time, the determination result of the failure of the solder paste is notified to the user via the display 14. The user needs to remove the solder paste printed on the circuit board 16 to be soldered and the circuit board 16 to be soldered is returned to the printing station to repeat the above process. When the expiration date of the solder paste has not been exceeded and the start time of exposure of the solder paste to the air is less than the second predetermined time, the controller 13 determines that the solder paste is valid, and the process enters the next step.

[0077] Next, at the mounting station, the sheet-like electronic components are mounted on the surface of the circuit board 16 to be soldered. The solder paste has a certain viscosity at room temperature, and can pre-stick the sheet-like electronic components to the predetermined position on the circuit board 16 to be soldered.

[0078] Next, the circuit board 16 to be soldered with sheet electronic components mounted thereon is sent to the soldering station according to the process flow recorded in the matched work order 111. At the soldering station, the first marking code 161 of the circuit board 16 to be soldered is identified by a scanning gun to obtain the status information of the solder paste printed on the circuit board 16 to be soldered and the start time of exposure to the air associated with the first marking code 161.

[0079] Next, based on the state information of the solder paste on the circuit board 16 to be soldered and the start time of exposure to the air, it is determined whether the solder paste on the circuit board 16 to be soldered is valid. The determination method is the same as the method for determining whether the solder paste on the circuit board 16 to be soldered is valid at the mounting station. If the controller 13 determines that the solder paste is invalid, the determination result of the solder paste failure is notified to the user via the display 14. The user needs to remove the solder paste printed on the circuit board 16 to be soldered and the circuit board 16 to be soldered is returned to the printing station and the above process is repeated. If the controller 13 determines that the solder paste is valid, the process enters the next step.

[0080] Next, the circuit board 16 to be soldered is placed at a relatively high soldering temperature so that the chip-shaped electronic components are permanently soldered on the circuit board through solder paste, thereby forming a circuit board.

[0081] In summary, the material inspection system and material inspection method provided by the present invention can automatically compare the basic information of the actual materials used to process the product to be processed with the basic information of the required materials needed to process the product through a controller to verify whether the actual materials are correct, thereby avoiding the use of wrong materials. In addition, the material inspection system and material inspection method provided by the present invention can also inspect whether the actual materials are effective, avoiding the use of invalid actual materials that affect the quality of the processed products. Moreover, compared with the known manual visual comparison and manual inspection, the efficiency is improved and the error rate is reduced.

[0082] It should be understood that various different embodiments can be further designed by combining or modifying different embodiments and various technical features in different ways.

[0083] The wire stripping tool according to the preferred embodiment of the present invention is described above in conjunction with the specific embodiments. It is understood that the above description is only exemplary and not restrictive, and those skilled in the art can conceive of various variations and modifications with reference to the above description without departing from the scope of the present invention. These variations and modifications are also included in the protection scope of this application.

Claims

1. A material inspection system, characterized in that: The material inspection system comprises: A memory, wherein a plurality of work orders are pre-stored in the memory, wherein the work orders include first matching information related to the product to be processed and basic information of required materials to be used for processing the product; A first identification device, wherein the first identification device is configured to: identify a first marking code of the product to obtain second matching information and identify a second marking code of the actual material taken to obtain basic information and status information of the actual material; a controller connected to the memory and the first identification device and configured to: receiving the second matching information, matching the product with one of the multiple work orders through the second matching information and the first matching information, and obtaining basic information of the required material contained in the one work order, and receiving the basic information of the actual material and the status information and comparing the basic information of the actual material with the basic information of the required material to determine whether the actual material is correct and determining whether the actual material is valid based on the status information; and A notification device is configured to output a determination result of the controller.

2. The material inspection system according to claim 1, characterized in that: The controller is further configured to: when it is determined that the actual material is correct and valid, associate the basic information and the status information of the actual material with the first marking code.

3. The material inspection system according to claim 2, characterized in that: The first identification device is arranged at a starting station in the production line, and the material inspection system includes a second identification device, which is located at a subsequent station downstream of the starting station in the production line. The second identification device is used to identify the first marking code of the product to obtain the status information of the actual material associated with the first marking code. The controller is also configured to receive the status information obtained by the second identification device and determine whether the actual material is valid based on the status information obtained by the second identification device.

4. The material inspection system according to claim 3, characterized in that: The product is a circuit board to be soldered, and the actual material is solder paste or flux.

5. The material inspection system according to claim 4, characterized in that: The status information of the actual material includes the start time of the temperature recovery of the solder paste or the flux, the first predetermined time for the temperature recovery, and / or the expiration date. The determination of whether the actual material is valid includes: When the time from the start of the temperature recovery is greater than or equal to the first predetermined time, the solder paste or the flux is determined to be effective; when the time from the start of the temperature recovery is less than the first predetermined time, the solder paste or the flux is determined to be temporarily ineffective; and / or When the expiration date is exceeded, the solder paste or the soldering flux is determined to be invalid, and when the expiration date is within the expiration date, the solder paste or the soldering flux is determined to be valid.

6. The material inspection system according to claim 5, characterized in that: The material inspection system further includes an input device, the input device being configured to input a start time of exposure of the solder paste or the soldering flux to the air, the start time being input to be associated with the first marking code and stored in the memory; The controller is further configured to receive the start time associated with the first marking code obtained by the second recognition device recognizing the first marking code and determine that the solder paste or the flux is invalid when the time from the start time is greater than or equal to a second predetermined time.

7. The material inspection system according to claim 5, characterized in that: The first identification device can also obtain the temperature recovery number information arranged in sequence according to the temperature recovery start time by identifying the second marking code. The controller is also configured to receive the temperature recovery number information and inform the user via the notification device when the temperature recovery number information is discontinuous with the previous temperature recovery number of the actual material stored in the memory that is judged to be correct and valid.

8. The material inspection system according to any one of claims 1 to 7, characterized in that: The basic information of the required material includes the material model and / or material batch number of the required material; and the basic information of the actual material includes the material model and / or batch number of the actual material.

9. The material inspection system according to any one of claims 1 to 7, characterized in that: The second matching information includes a product code and / or a product name of the product; and the first matching information includes a product code and / or a product name of the product.

10. The material inspection system according to any one of claims 1 to 7, characterized in that: The notification device is configured to output basic information of the required materials included in the one work order after the controller matches the product with the one work order.

11. A material inspection method, characterized in that: The material inspection method is performed using a material inspection system, the material inspection system comprising a memory, a first identification device, a controller and a notification device, the memory pre-stores a plurality of work orders, the work orders comprising first matching information related to the product to be processed and basic information of the required materials to be used for processing the product, the material inspection method comprising: Acquire the product, wherein the product has a first marking code; recognizing the first marking code by the first recognition device to obtain second matching information; The controller receives the second matching information, matches the product with one of the multiple work orders through the second matching information and the first matching information, and obtains basic information of the required material contained in the one work order; Acquire an actual material, wherein the actual material has a second marking code; Identify the second marking code by the first identification device to obtain basic information and status information of the actual material; and The controller receives the basic information of the actual material and the status information, compares the basic information of the actual material with the basic information of the required material to determine whether the actual material is correct, and determines whether the actual material is valid based on the status information and outputs the determination result through the notification device.

12. The material inspection method according to claim 11, characterized in that: The material inspection method further includes: when it is determined that the actual material is correct and valid, associating the basic information and the status information of the actual material with the first marking code.

13. The material inspection method according to claim 12, characterized in that: The first identification device is arranged at a starting station in the production line, the material inspection system comprises a second identification device, the second identification device is arranged at a subsequent station downstream of the starting station in the production line, and the material inspection method comprises: At the subsequent workstation, identifying the first marking code of the product by the second recognition device to obtain the status information of the actual material associated with the first marking code; and The controller receives the status information acquired by the second identification device and determines whether the actual material is valid based on the status information acquired by the second identification device.

14. The material inspection method according to claim 13, characterized in that: The product is a circuit board to be soldered, and the actual material is solder paste or flux.

15. The material inspection method according to claim 14, characterized in that: The status information of the actual material includes the start time of the temperature recovery of the solder paste or the flux, the first predetermined time for the temperature recovery, and / or the expiration date. The determination of whether the actual material is valid includes: When the time from the start of the temperature recovery is greater than or equal to the first predetermined time, the solder paste or the flux is determined to be effective; when the time from the start of the temperature recovery is less than the first predetermined time, the solder paste or the flux is determined to be temporarily ineffective; and / or When the expiration date is exceeded, the solder paste or the soldering flux is determined to be invalid, and when the expiration date is within the expiration date, the solder paste or the soldering flux is determined to be valid.

16. The material inspection method according to claim 15, characterized in that: The material inspection system further includes an input device, and the material inspection method further includes: Inputting the start time of the solder paste or the soldering flux being exposed to the air through the input device, the start time being input to be associated with the first marking code and stored in the memory; and The controller receives the start time associated with the first marking code obtained by the second recognition device recognizing the first marking code and determines that the solder paste or the flux is invalid when the time from the start time is greater than or equal to a second predetermined time.

17. The material inspection method according to claim 15, characterized in that: The material inspection method further comprises: The first recognition device recognizes the second mark code to obtain the temperature recovery number information arranged in sequence according to the temperature recovery start time; and The controller receives the temperature recovery number information and informs the user via the notification device when the temperature recovery number information is discontinuous with the temperature recovery number of the actual material that was previously determined to be correct and valid and stored in the memory.

18. The material inspection method according to any one of claims 11 to 17, characterized in that: The basic information of the required material includes the material model and / or material batch number of the required material; and the basic information of the actual material includes the material model and / or batch number of the actual material.

19. The material inspection method according to any one of claims 11 to 17, characterized in that: The second matching information includes a product code and / or a product name of the product; and the first matching information includes a product code and / or a product name of the product.

20. The material inspection method according to any one of claims 11 to 17, characterized in that: The material inspection method further includes outputting basic information of the required material contained in the work order through the notification device after the controller matches the product with the work order.

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