Automatic counting and piling system used after PCB cutting, grinding and target drilling and scheduling control method of automatic counting and piling system

Abstract

The invention provides an automatic counting and stacking system used after PCB cutting, grinding and target drilling and a dispatching control method of the automatic counting and stacking system used after PCB cutting, grinding and target drilling. The automatic counting and stacking system comprises a cutting and grinding connection device, a double-station transplanting device, a multi-stacking-position feeding device, a rail moving stacking car, a counting waiting temporary storage frame and an automatic stacking machine; the two-dimensional inner code endowed in each PCB is converted into an outer code, and expansion and shrinkage test data information is recorded; the double-station transplanting device receives the PCBs of the cutting and grinding wiring device through the first carrying table and transplants the PCBs to the second carrying table to be stacked. The multi-stacking-position feeding device conveys the stacked PCBs to a third carrying table, a fourth carrying table, a fifth carrying table and a sixth carrying table; the rail moving piling car conveys materials in all directions through a seventh carrying platform; the to-be-counted temporary storage rack is used for receiving waiting temporary storage of to-be-counted materials and temporary storage of to-be-stacked materials; the automatic pile-dividing machine performs pile-dividing storage to corresponding discharging stations according to the expansion and contraction pile-dividing rule requirements; and automatic counting and piling are realized.

Description

[Technical field]

[0001] The invention relates to a PCB board processing technology, in particular to an automatic counting and stacking system for PCB cutting, grinding and drilling targets and a scheduling control method thereof. [Background technology]

[0002] PCB boards are also called printed circuit boards. PCB boards are widely used in consumer electronics, military, communications, medical and other fields. The development of technology has brought about higher and higher demands for product assembly accuracy, performance requirements and functional diversification. After the PCB product pressing process, the existing technology only analyzes the expansion and contraction data of products with one batch number and processes them in piles according to the expansion and contraction caused by the pressing process. This has many disadvantages, which are mainly manifested in the following aspects:

[0003] (1) In terms of single board records, the traditional method often uses manual recording of single board expansion and contraction data, which is prone to recording errors, omissions or unclear handwriting, making it difficult to ensure the accuracy and completeness of the data.

[0004] (2) In terms of manual data processing, relying on manual work to organize, calculate and analyze a large amount of expansion and contraction data is not only time-consuming and labor-intensive, but also easily affected by human factors, such as calculation errors and misunderstanding of data, thereby reducing the accuracy and reliability of data processing.

[0005] (3) In terms of manual stacking, it is completely dependent on manual work based on the results of data analysis. This process is highly subjective and can easily lead to incorrect stacking due to personal misjudgment, thus affecting the consistency of product quality.

[0006] (4) In terms of efficiency, the entire process, from data collection to processing to stacking, is done manually. Manual measurement and recording are slow and cannot meet the needs of large-scale production. This seriously affects production efficiency, especially when the batch size is large.

[0007] (5) In terms of errors, manual operation will inevitably introduce various errors, including measurement errors, recording errors, processing errors and stacking errors. The accumulation of these errors may cause the expansion and shrinkage control of the final product to exceed the specification requirements and increase the scrap rate.

[0008] From the above situation, we can see that the traditional way of analyzing the expansion and shrinkage data of a batch of single-number products and sorting them into piles has many disadvantages, especially the traditional way of sorting PCBs after cutting, grinding and drilling targets is all done by manual recording and manual operation. There are also the following problems: First, the efficiency is low, and manual measurement and recording are slow, which is difficult to meet the needs of large-scale production; second, it is easily affected by human factors, and the measurement accuracy and recording accuracy depend on the skills and concentration of the operator, which is prone to errors; third, data integration is difficult, and the scattered manual recording data is cumbersome to integrate and analyze, which consumes time and energy.

[0009] In addition, due to the performance differences, process parameter adaptation, mold precision and maintenance of different presses in small-batch production, there are differences in expansion, shrinkage and uniformity, including the following problems: First, different presses may have differences in pressure control, temperature uniformity and other aspects, resulting in inconsistent expansion and shrinkage of the product during the pressing process; second, the problem of process parameter adaptability. For small-batch production, the process parameters may not be fully optimized for different machines, resulting in different expansion and shrinkage effects for the same product on different machines; third, the influence of mold precision. The inconsistent precision of the carriers used by the press will also cause uneven force on the product during pressing, thereby affecting expansion, shrinkage and uniformity; fourth, the different maintenance conditions and the uneven maintenance levels of the machines affect the stability and consistency of the equipment, resulting in fluctuations in product quality, including differences in expansion, shrinkage and uniformity.

[0010] In summary, the existing PCB product counting and stacking process has high labor costs, low production efficiency, high error rate, poor consistency, and difficulty in product traceability. There is an urgent need to seek more efficient, accurate and automated solutions to improve the expansion and contraction control of PCB after cutting, grinding and drilling in the existing pressing process. [Summary of the invention]

[0011] The present invention provides an automatic counting and stacking system for PCB cutting, grinding and drilling and a scheduling control method thereof, which realizes data traceability by controlling the coding of single boards, effectively improves production efficiency, reduces costs and ensures the stability and consistency of quality.

[0012] In order to achieve the above-mentioned invention object, the technical solution adopted is as follows:

[0013] An automatic counting and stacking system for PCB cutting, grinding and drilling targets, comprising:

[0014] The cutting and grinding connection device performs X-Ray pre-alignment, cutting and grinding, corner rounding, coding, cleaning, thickness measurement and X-Ray drilling on each PCB board. Combined with the MES system management and control, the internal code of each PCB board is converted into an external code, and the expansion and contraction test data information and copper thickness test information are automatically recorded after coding;

[0015] The duplex transfer device comprises a first carrier and a second carrier, wherein the first carrier is used to receive the PCB boards discharged from the cutting and grinding connection device, and automatically transfer the boards to the second carrier from front to back to stack them, and the second carrier receives the empty carriers transferred from right to left along the left-right direction and transfers the received PCB boards stacked in a pile from front to back to the next station;

[0016] A multi-stack feeding device, which conveys the stacked PCB boards to a third carrier, a fourth carrier, a fifth carrier and a sixth carrier arranged in sequence along the front-to-back direction through a multi-stack feeding conveyor belt, wherein the fourth carrier and the fifth carrier completely connect the material conveyance between the third carrier and the sixth carrier, and both automatically convey the stacked PCB boards from the front to the back and serve as a waiting temporary storage area for materials to be divided into stacks, and the third carrier and the sixth carrier both automatically convey the stacked PCB boards from the front to the back and transfer the stacked PCB boards from left to right along the left-right direction; The third carrier is arranged between the second carrier and the fourth carrier for transferring materials on the second carrier to the fourth carrier, and for the second carrier to transfer materials to the third carrier when encountering PCB boards that are not stacked in a uniform number, and to start the transfer from right to left through the third carrier to the next station to be stored in the temporary storage rack for the next station to wait for the materials to be stacked; the sixth carrier is a material position for preparing to stack materials, which automatically transfers the stacked PCB boards from front to back and transfers the stacked PCB boards from left to right along the left and right directions, and transfers the empty carriers from left to right along the left and right directions;

[0017] The rail-mounted mobile stacker comprises a translation track and a seventh carrier, the seventh carrier being used to transport materials in four directions, from front to back, or from back to front, or from right to left, or from left to right, respectively; the translation track is located beside the duplex displacement device and the multi-position feeding device, and is arranged parallel to the multi-position feeding conveyor belt; the seventh carrier moves forward and backward along the translation track, and its left and right ends are respectively docked with the sixth carrier, or the second carrier, or the third carrier, or a plurality of carriers on each layer of a to-be-completed temporary storage rack arranged parallel to the translation track at a mobile docking position, and is used for multi-layer stacking of materials, or docking between temporary storage of to-be-completed materials and returning to the team for transportation, or returning and transporting of empty carriers after stacking is completed;

[0018] The temporary storage rack for the materials to be assembled adopts a structure of multiple carriers of at least two layers, and the multiple carriers on each layer transfer materials in two directions from right to left or from left to right, and is used for receiving the temporary storage of the materials to be assembled and the buffer storage of the materials to be stacked;

[0019] The automatic stacking machine is arranged at the sixth carrier, and comprises a multi-axis robotic arm and at least four discharge ports. The multi-axis robotic arm stacks the materials on the sixth carrier according to the expansion and contraction stacking rule requirements and stores them in the discharge station corresponding to each discharge port. All discharge stations are provided with AGV carts for discharge and transportation. The AGV carts transport the stacked materials to the designated temporary storage racks set up in the periphery according to the expansion and contraction stacking rule instructions for temporary storage and wait for scheduling.

[0020] Preferably, the temporary storage rack for waiting to be completed adopts a double-layer multiple-carrier assembly structure with the upper and lower layers aligned and stacked, and the eighth, ninth, tenth, eleventh and twelfth carriers are arranged on the upper layer of the temporary storage rack for waiting to be completed, and the thirteenth, fourteenth, fifteenth, sixteenth and seventeenth carriers are arranged on the lower layer of the temporary storage rack for waiting to be completed. All the carriers transmit materials in both directions from right to left or from left to right, and are used for receiving waiting temporary storage of materials to be completed and caching temporary storage of materials to be stacked.

[0021] Preferably, the automatic stacking machine is provided with four discharge ports A, B, C and D, and the discharge ports A, B, C and D correspond to the eighteenth carrier discharge station, the nineteenth carrier discharge station, the twentieth carrier discharge station and the twenty-first carrier discharge station, respectively. The eighteenth carrier discharge station, the nineteenth carrier discharge station, the twentieth carrier discharge station and the twenty-first carrier discharge station are defined as 1 to 4 types of expansion and contraction according to the expansion and contraction stacking rules. range, or define any one of the carrier unloading stations as an NG station according to the expansion and contraction stacking rules; the automatic stacking machine determines whether stacking is needed through the MES system and according to the expansion and contraction data measured by the X-RAY drilling target machine on the cutting and grinding connection device and the expansion and contraction stacking rules, and sends instructions to the multi-axis robotic arm for stacking, and the multi-axis robotic arm stacks the materials on the sixth carrier according to the expansion and contraction stacking rules and stores them at the unloading stations corresponding to the discharge ports A, B, C and D.

[0022] According to the above-mentioned scheduling control method for the automatic numbering and stacking system after PCB cutting, grinding and drilling targets, the following steps are included:

[0023] S1, cutting and grinding connection, the cutting and grinding connection device performs X-Ray pre-alignment, cutting and grinding, corner rounding, coding, cleaning, thickness measurement and X-Ray drilling on each PCB board. The X-Ray drilling generates expansion and shrinkage test data according to the QR code, and combines with the MES system control to convert the internal code of each PCB board into an external code. After coding, the expansion and shrinkage test data information and copper thickness test information are automatically recorded;

[0024] S2. Analysis and Scheduling: The overall control instructions of the automatic stacking machine are uniformly analyzed and scheduled based on the MES system. When the first carrier on the duplex displacement device receives the incoming material from the cutting and grinding connection device, the code is scanned to extract the information, and then the duplex displacement device is used to translate the PCB board on the first carrier to the second carrier for stacking. Before stacking, the seventh carrier on the rail mobile stacker is used to place the empty carrier of the flat plate; the subsequent scheduling is carried out according to the incoming material situation:

[0025] S3, situation a, when the same batch of incoming materials are all in quantity and meet the conditions for stacking;

[0026] The whole stack of PCB boards on the second carrier is sequentially transferred to the sixth carrier by the third carrier, the fourth carrier, and the fifth carrier on the multi-stack feeding device;

[0027] Then, the code is scanned at the sixth carrier, and the scanned code information is transmitted to the MES system. The automatic stacking machine receives the stacking task. According to the instructions issued by the MES system, the multi-axis robotic arm stacks the PCB boards on the sixth carrier according to the expansion and contraction stacking rules, and stacks them to the designated 18th carrier unloading station, 19th carrier unloading station, 20th carrier unloading station and 21st carrier unloading station according to the expansion and contraction stacking rules, completing the whole batch stacking;

[0028] Then, the MES system issues instructions, and the AGV moves the stacked PCB boards sorted at the 18th, 19th, 20th, and 21st platform unloading stations to the surrounding temporary storage racks for storage and waiting for transfer.

[0029] At the same time, the empty carrier on the sixth platform is shifted to the seventh platform of the rail-mounted mobile stacker by the multi-axis robot arm, and the rail-mounted mobile stacker returns the empty carrier on the seventh platform to the second platform on the duplex displacement device with vacant space through the translation track, or to the eighth platform, the ninth platform, the tenth platform, the eleventh platform, the twelfth platform, the thirteenth platform, the fourteenth platform, the fifteenth platform, the sixteenth platform and the seventeenth platform with vacant space on the temporary storage rack, and temporarily stores the empty carrier, and waits for the second platform to transfer and deliver it through the seventh platform on the rail-mounted mobile stacker at any time when there is a demand;

[0030] S4, case b, when the PCB board is stacked from the first carrier to the second carrier on the duplex displacement device, the incoming material value required by the MES system is not met, that is, the condition for uniform stacking is not met;

[0031] The uncompleted stacked PCB boards on the second carrier position of the duplex displacement device are transferred to the third carrier on the multi-position feeding device through the second carrier, and are transferred to the seventh carrier of the rail-mounted mobile stacker at the third carrier position, and are laterally moved along the translation track by the seventh carrier to shift the uncompleted stacked PCB boards to the empty positions of the eighth carrier, the ninth carrier, the tenth carrier, the eleventh carrier, the twelfth carrier, the thirteenth carrier, the fourteenth carrier, the fifteenth carrier, the sixteenth carrier and the seventeenth carrier on the temporary storage rack to be temporarily stored and wait for completion;

[0032] When encountering remaining incoming PCB boards to be assembled, the MES system will give instructions in advance, requesting the 8th carrier, the 9th carrier, the 10th carrier, the 11th carrier, the 12th carrier, the 13th carrier, the 14th carrier, the 15th carrier, the 16th carrier and the 17th carrier on the temporary storage rack to be assembled to return to the queue for assembly. At this time, the 7th carrier on the rail mobile stacker will, according to the MES system scheduling, transport the PCB boards to be stacked on the temporary storage rack to the second carrier position on the duplex displacement device for stacking. After the stacking conditions are met, continue to execute the process of situation a in step S3 and proceed to the stacking process.

[0033] S5, case c, when the condition of full stacking is met, but the automatic stacking machine is performing a stacking task on the sixth platform, and at the same time, the fourth platform and the fifth platform have tasks to be stacked in order;

[0034] At this time, the rule of situation b is adopted, and the completed PCB boards are transferred from the second carrier to the third carrier on the multi-stack feeding device, and are transferred to the seventh carrier of the rail-mounted mobile stacker at the third carrier, and are moved horizontally along the translation track through the seventh carrier to be transferred to the empty positions of the eighth carrier, the ninth carrier, the tenth carrier, the eleventh carrier, the twelfth carrier, the thirteenth carrier, the fourteenth carrier, the fifteenth carrier, the sixteenth carrier and the seventeenth carrier on the temporary storage rack to be completed for temporary storage, and wait for the fourth carrier, the fifth carrier and the sixth carrier to have empty positions before sorting;

[0035] S6. According to the conditional logic in step S3, step S4 and step S5, through the MES system, the second carrier on the duplex displacement device and the third, fourth, fifth and sixth carriers on the multi-position feeding device, as well as the eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth and seventeenth carriers on the temporary storage rack to be completed are respectively dispatched and coordinated with the seventh carrier on the rail mobile stacker in an orderly manner, so as to realize the fully automated dispatching control of automatic numbering and stacking of PCBs after cutting, grinding and drilling.

[0036] Advantages of the present invention:

[0037] The automatic counting and stacking system of the present invention can adapt to PCB boards of different specifications, sizes and types, and can be seamlessly connected with other equipment and process flows of cutting and grinding lines, without affecting the overall production efficiency and quality. By coding the single board, the whole process can be traced, thereby recording the expansion and contraction of the drilling target measurement; and under the premise of ensuring the accuracy of stacking, the speed and efficiency of stacking can be effectively improved, bringing substantial improvement to production efficiency. The specific advantages include the following aspects:

[0038] (1) Improve production efficiency. Automatic stacking reduces the time and labor input of manual operation and can complete the stacking task quickly and accurately, thereby greatly improving the efficiency of the entire production process;

[0039] (2) Reduce the error rate. Manual stacking may cause stacking errors due to factors such as fatigue and negligence, while the automatic stacking machine can accurately stack according to the preset procedures and standards, reducing the possibility of errors;

[0040] (3) Ensure the stability of product quality. Through standardized and automated stacking operations, the impact of human factors on product quality is reduced, making product quality more stable and reliable;

[0041] (4) Save labor costs. No longer need a large number of people to carry out stacking work, which helps to reduce the labor costs of production.

[0042] (5) Improve the controllability of the production process. The automatic stacking machine can realize real-time monitoring and data recording, which is convenient for effective control and optimization of the production process;

[0043] (6) Substantially improve production efficiency, efficient stacking speed and accuracy, efficient and high-quality production methods, significantly improve the speed and efficiency of stacking, and effectively meet customers' requirements for product quality and delivery time;

[0044] (7) It is conducive to the realization of intelligent production, and can accurately detect and respond to the position, status and characteristics of PCB boards, thereby achieving accurate stacking operations and realizing full-process automated production.

[0045] In summary, the entire system is highly accurate, has strong data traceability and real-time monitoring when working. The drill target measurement can provide relatively accurate expansion and shrinkage data, which is convenient for more accurate control of product quality. The measurement data of each single board is recorded in detail, which is convenient for subsequent quality analysis and problem tracing. Moreover, the expansion and shrinkage information can be obtained in time during the production process, which is convenient for timely adjustment of process parameters. Automated stacking operation can be realized, which is closely coordinated with the cutting and grinding drill target line to accurately and quickly classify and control the processed products, thereby adapting to automated and intelligent production and effectively improving production efficiency and production quality.

Brief Description of the Drawings

[0046] Figure 1 It is a schematic diagram of the top view structure of the system of the present invention;

[0047] Figure 2 This is a schematic diagram of the main structure of the temporary storage rack to be completed in the present invention;

[0048] Figure 3 A schematic diagram of the board structure and partial enlarged structure for assigning a two-dimensional code to each PCB board in the present invention. [Specific implementation method]

[0050] In order to make the technical scheme of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. It should be pointed out that the following embodiments do not limit the protection scope of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0052] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "front", "rear", "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0053] An automatic counting and stacking system for PCB cutting, grinding and drilling targets, such as Figure 1 and Figure 2 As shown, it includes a cutting and grinding connection device a, a duplex displacement and planting device b, a multi-stack feeding device c, a rail-mounted mobile stacker d, a temporary storage rack e and an automatic stacking machine f. The cutting and grinding connection device a performs X-Ray pre-alignment, cutting and grinding, corner rounding, coding, cleaning, thickness measurement and X-Ray drilling on each PCB board, and combines with the MES system control to convert the internal code of each PCB board into an external code. After coding, it automatically records the expansion and shrinkage test data information and copper plate thickness test information. The above information can play an important role in process control and quality improvement in the later process, such as drilling, milling edge file matching, graphic exposure alignment expansion and shrinkage, etc. Among them, Figure 3As shown, coding is to mark each PCB board with a single-board two-dimensional code by a laser marking machine; the duplex displacement device b includes a first carrier 1 and a second carrier 2, the first carrier 1 is used for receiving the PCB board discharged by the cutting and grinding connection device a, and automatically transferring the single board to the second carrier 2 from front to back and stacking it, the second carrier 2 receives the empty carrier transferred from right to left along the left-right direction and transfers the received PCB board stacked in a pile from front to back to the next station.

[0054] like Figure 1 As shown, the multi-stack feeding device c conveys the stacked PCB boards to the third platform 3, the fourth platform 4, the fifth platform 5 and the sixth platform 6 which are arranged in sequence along the front-to-back direction through the multi-stack feeding conveyor belt c0. The fourth platform 4 and the fifth platform 5 completely connect the material transmission between the third platform 3 and the sixth platform 6, and both automatically convey the stacked PCB boards from the front to the back and serve as a waiting temporary storage area for the materials to be divided into piles. The third platform 3 and the sixth platform 6 both automatically convey the stacked PCB boards from the front to the back and transfer the stacked PCB boards from left to right along the left-right direction. The third platform 3 is arranged between the second platform 2 and the fourth platform 4 for transferring the materials on the second platform 2 to the fourth platform 4, and When the second carrier 2 encounters PCB boards that are not stacked in uniform numbers, the materials will be transferred to the third carrier 3, and the third carrier 3 will be used to start the transfer from right to left and transport them to the temporary storage rack e set at the next workstation for temporary storage and waiting for them to be stacked; the sixth carrier 6 is a material position for preparing to stack materials, which automatically transfers the stacked PCB boards from front to back and transfers the stacked PCB boards from left to right along the left and right directions, as well as transfers the empty carriers from left to right along the left and right directions; and, because a special carrier needs to be placed at the bottom of the stacked PCB boards to transport the materials, it is prevented that the materials directly contact the multi-stack feeding conveyor belt and affect the quality; therefore, the sixth carrier 6 with the carrier moved out needs to have the function of transferring from left to right along the left and right directions.

[0055] Continue as Figure 1 As shown, the rail-mounted mobile stacker d includes a translation track d0 and a seventh platform 7. The seventh platform 7 is used to transport materials in four directions, namely, from front to back, from back to front, from right to left, or from left to right. The translation track is located beside the duplex displacement device b and the multi-position feeding device c, and is arranged parallel to the multi-position feeding conveyor belt; the seventh platform 7 moves forward and backward along the translation track, and its left and right ends are respectively docked with the sixth platform 6, or the second platform 2, or the third platform 3, or a plurality of platforms on each layer of the to-be-completed temporary storage rack e arranged parallel to the side of the translation track at a mobile docking position, which is used for multi-layer stacking of materials or docking of temporary storage of to-be-completed materials with returning to the team for transportation, or returning and transporting of empty carriers after stacking is completed;

[0056] like Figure 1 and Figure 2As shown, the temporary storage rack e to be completed adopts a double-layer multi-platform assembly shelf structure in which the upper layer and the lower layer are aligned and stacked. The eighth platform 8, the ninth platform 9, the tenth platform 10, the eleventh platform 11 and the twelfth platform 12 are arranged on the upper layer of the temporary storage rack e to be completed. e The lower layer is provided with the thirteenth platform 13, the fourteenth platform 14, the fifteenth platform 15, the sixteenth platform 16 and the seventeenth platform 17. All the platforms on each layer can transfer materials in two directions from right to left or from left to right, and are used for waiting temporary storage of materials to be totaled and caching temporary storage of materials to be divided into piles. The automatic stacking machine f is arranged at the sixth carrier 6, and includes a multi-axis robot arm f0 and four discharge ports, which are discharge port A, discharge port B, discharge port C and discharge port D in sequence. The discharge port A, discharge port B, discharge port C and discharge port D correspond to the eighteenth carrier 18 discharge station, the nineteenth carrier 19 discharge station, the twentieth carrier 20 discharge station and the twenty-first carrier 21 discharge station, respectively. The eighteenth carrier 18 discharge station, the nineteenth carrier 19 discharge station, the twentieth carrier 20 discharge station and the twenty-first carrier 21 discharge station are defined as 1 to 4 expansion and contraction ranges according to the expansion and contraction stacking rule, or any one of the expansion and contraction ranges is defined according to the expansion and contraction stacking rule. The material discharging station of each carrier is an NG station; the automatic stacking machine f determines whether stacking is needed through the MES system and according to the expansion and contraction data measured by the X-RAY drilling target machine on the cutting and grinding connection device a and the expansion and contraction stacking rules, and sends instructions to the multi-axis robotic arm f0 for stacking. The multi-axis robotic arm stacks the materials on the sixth carrier 6 according to the expansion and contraction stacking rules and stores them at the discharging stations corresponding to the discharging ports A, B, C and D; AGV carts 22 for discharging and transportation are provided corresponding to all the discharging stations. The AGV carts 22 transport the stacked materials to the designated temporary storage racks set up in the periphery for temporary storage according to the expansion and contraction stacking rules and wait for scheduling.

[0057] The scheduling control method corresponding to the automatic numbering and stacking system after PCB cutting, grinding and drilling targets is as follows: Figures 1 to 3 As shown, the following steps are included:

[0058] S1, cutting and grinding connection, the cutting and grinding connection device a performs X-Ray pre-alignment, cutting and grinding, corner rounding, coding, cleaning, thickness measurement and X-Ray drilling on each PCB board. The X-Ray drilling generates expansion and shrinkage test data according to the QR code, and combines with the MES system control to convert the internal code of each PCB board into an external code. After coding, the expansion and shrinkage test data information and copper thickness test information are automatically recorded;

[0059] S2, analysis and scheduling. The overall control instructions of the automatic stacking machine f are uniformly analyzed and scheduled based on the MES system. When the first carrier 1 on the duplex displacement device b receives the incoming material from the cutting and grinding connection device a, the code is scanned to extract the information. Then, the duplex displacement device b moves the PCB board on the first carrier 1 to the second carrier 2 for stacking. Before stacking, the seventh carrier 7 on the rail-mounted mobile stacker d is used to place the empty carrier of the flat plate. Subsequently, scheduling is performed according to the incoming material situation:

[0060] S3, situation a, when the same batch of incoming materials are all in quantity and meet the conditions for stacking;

[0061] The whole stack of PCB boards on the second stage 2 is sequentially transferred to the sixth stage 6 by the third stage 3, the fourth stage 4, and the fifth stage 5 on the multi-stack feeding device c;

[0062] Then, the code is scanned at the sixth carrier 6, and the scanned code information is transmitted to the MES system. The automatic stacking machine f receives the stacking task. According to the instructions issued by the MES system, the multi-axis robotic arm stacks the PCB boards stacked on the sixth carrier 6 according to the expansion and contraction stacking rules, and stacks them to the designated eighteenth carrier 18 unloading station, the nineteenth carrier 19 unloading station, the twentieth carrier 20 unloading station, and the twenty-first carrier 21 unloading station according to the expansion and contraction stacking rules, completing the whole batch stacking;

[0063] Next, the MES system issues an instruction, and the AGV 22 moves the stacked PCB boards separated at the 18th carrier 18 unloading station, the 19th carrier 19 unloading station, the 20th carrier 20 unloading station, and the 21st carrier 21 unloading station to the peripheral temporary storage racks for storage and waiting for transfer;

[0064] At the same time, the empty carrier on the sixth platform 6 is shifted to the seventh platform 7 of the rail-mounted mobile stacker d by the multi-axis robot arm, and the rail-mounted mobile stacker d returns the empty carrier on the seventh platform 7 to the second platform 2 on the duplex displacement device b with vacant space through the translation track, or waits for the eighth platform 8, the ninth platform 9, the tenth platform 10, the eleventh platform 11, the twelfth platform 12, the thirteenth platform 13, the fourteenth platform 14, the fifteenth platform 15, the sixteenth platform 16 and the seventeenth platform 17 with vacant space on the temporary storage rack e, and temporarily stores the empty carrier, and waits for the transfer and delivery to the second platform 2 by the seventh platform 7 on the rail-mounted mobile stacker at any time when there is a demand;

[0065] S4, case b, when the PCB board is stacked from the first carrier 1 to the second carrier 2 on the duplex displacement device b, the incoming material value required by the MES system is not met, that is, the condition for uniform stacking is not met;

[0066] The uncompleted stacked PCB boards on the second carrier 2 on the duplex displacement device b are transferred to the third carrier 3 on the multi-position feeding device c through the second carrier 2, and are transferred to the seventh carrier 7 of the rail-mounted mobile stacker d at the third carrier 3, and are laterally moved along the translation track by the seventh carrier 7 to shift the uncompleted stacked PCB boards to the empty positions of the eighth carrier 8, the ninth carrier 9, the tenth carrier 10, the eleventh carrier 11, the twelfth carrier 12, the thirteenth carrier 13, the fourteenth carrier 14, the fifteenth carrier 15, the sixteenth carrier 16 and the seventeenth carrier 17 on the temporary storage rack e to be temporarily stored and wait for completion;

[0067] When encountering remaining incoming PCB boards to be completed, the MES system will give instructions in advance, requesting the eighth platform 8, the ninth platform 9, the tenth platform 10, the eleventh platform 11, the twelfth platform 12, the thirteenth platform 13, the fourteenth platform 14, the fifteenth platform 15, the sixteenth platform 16 and the seventeenth platform 17 on the temporary storage rack e to be completed to be returned to the queue for completion. At this time, the seventh platform 7 on the rail mobile stacker d will, according to the MES system scheduling, transport the PCB boards to be stacked in the corresponding number on the temporary storage rack e to be completed to the second platform 2 on the duplex displacement device b for full stacking. After the stacking conditions are met, continue to execute the process of situation a in step S3 and proceed to the stacking process;

[0068] S5, situation c, when the condition of even number of stacking is met, but the automatic stacking machine f is performing the stacking task on the sixth platform 6, and at the same time the fourth platform 4 and the fifth platform 5 have tasks to be stacked in order;

[0069] At this time, the rule of situation b is adopted to transfer the completed PCB boards from the second carrier 2 to the third carrier 3 on the multi-stack feeding device c, and change direction at the third carrier 3 to the seventh carrier 7 of the rail-mounted mobile stacker d, and move horizontally along the translation track through the seventh carrier 7 to be transferred to the empty positions of the eighth carrier 8, the ninth carrier 9, the tenth carrier 10, the eleventh carrier 11, the twelfth carrier 12, the thirteenth carrier 13, the fourteenth carrier 14, the fifteenth carrier 15, the sixteenth carrier 16 and the seventeenth carrier 17 on the temporary storage rack e to be completed for temporary storage, and wait for the fourth carrier 4, the fifth carrier 5 and the sixth carrier 6 to have empty positions before sorting;

[0070] S6. According to the conditional logic in step S3, step S4 and step S5, through the MES system, the second platform 2 on the duplex displacement device b and the third platform 3, the fourth platform 4, the fifth platform 5, the sixth platform 6 on the multi-stack feeding device c, and the eighth platform 8, the ninth platform 9, the tenth platform 10, the eleventh platform 11, the twelfth platform 12, the thirteenth platform 13, the fourteenth platform 14, the fifteenth platform 15, the sixteenth platform 16, and the seventeenth platform 17 on the temporary storage rack e to be counted are respectively coordinated with the seventh platform 7 on the rail mobile stacker d in an orderly manner, so as to realize the fully automated scheduling control of automatic counting and stacking of PCBs after cutting, grinding and drilling.

[0071] In this embodiment, the automatic counting and stacking system can be seamlessly connected with other equipment and process flows of the cutting and grinding line, and can adapt to PCB boards of different specifications, sizes and types without affecting the overall production efficiency and quality. During operation, the whole process traceability is implemented by coding the single board, so as to record the expansion and contraction of the drill target measurement, and realize the automatic stacking operation under the premise of ensuring the accuracy of stacking, and closely cooperate with the cutting and grinding drill target line to accurately and quickly classify and control the processed products, so as to adapt to automated and intelligent production and effectively improve production efficiency and production quality. Effectively improve the speed and efficiency of stacking, and substantially improve the production efficiency of PCB boards.

[0072] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Except for the cases listed in the specific embodiments, all equivalent changes made according to the methods and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic counting and stacking system for PCB cutting, grinding and drilling targets, characterized in that: include: The cutting and grinding connection device performs X-Ray pre-alignment, cutting and grinding, corner rounding, coding, cleaning, thickness measurement and X-Ray drilling on each PCB board. Combined with the MES system management and control, the internal code of each PCB board is converted into an external code, and the expansion and contraction test data information and copper thickness test information are automatically recorded after coding; The duplex transfer device comprises a first carrier and a second carrier, wherein the first carrier is used to receive the PCB boards discharged from the cutting and grinding connection device, and automatically transfer the boards to the second carrier from front to back to stack them, and the second carrier receives the empty carriers transferred from right to left along the left-right direction and transfers the received PCB boards stacked in a pile from front to back to the next station; A multi-stack feeding device, which conveys the stacked PCB boards to a third carrier, a fourth carrier, a fifth carrier and a sixth carrier arranged in sequence along the front-to-back direction through a multi-stack feeding conveyor belt, wherein the fourth carrier and the fifth carrier completely connect the material conveyance between the third carrier and the sixth carrier, and both automatically convey the stacked PCB boards from the front to the back and serve as a waiting temporary storage area for materials to be divided into stacks, and the third carrier and the sixth carrier both automatically convey the stacked PCB boards from the front to the back and transfer the stacked PCB boards from left to right along the left-right direction; The third carrier is arranged between the second carrier and the fourth carrier for transferring materials on the second carrier to the fourth carrier, and for the second carrier to transfer materials to the third carrier when encountering PCB boards that are not stacked in a uniform number, and to start the transfer from right to left through the third carrier to the next station to be stored in the temporary storage rack for the next station to wait for the materials to be stacked; the sixth carrier is a material position for preparing to stack materials, which automatically transfers the stacked PCB boards from front to back and transfers the stacked PCB boards from left to right along the left and right directions, and transfers the empty carriers from left to right along the left and right directions; The rail-mounted mobile stacker comprises a translation track and a seventh carrier, the seventh carrier being used to transport materials in four directions, from front to back, or from back to front, or from right to left, or from left to right, respectively; the translation track is located beside the duplex displacement device and the multi-position feeding device, and is arranged parallel to the multi-position feeding conveyor belt; the seventh carrier moves forward and backward along the translation track, and its left and right ends are respectively docked with the sixth carrier, or the second carrier, or the third carrier, or a plurality of carriers on each layer of a to-be-completed temporary storage rack arranged parallel to the translation track at a mobile docking position, and is used for multi-layer stacking of materials, or docking between temporary storage of to-be-completed materials and returning to the team for transportation, or returning and transporting of empty carriers after stacking is completed; The temporary storage rack for the materials to be assembled adopts a structure of multiple carriers of at least two layers, and the multiple carriers on each layer transfer materials in two directions from right to left or from left to right, and is used for receiving the temporary storage of the materials to be assembled and the buffer storage of the materials to be stacked; The automatic stacking machine is arranged at the sixth carrier, and comprises a multi-axis robotic arm and at least four discharge ports. The multi-axis robotic arm stacks the materials on the sixth carrier according to the expansion and contraction stacking rule requirements and stores them in the discharge station corresponding to each discharge port. All discharge stations are provided with AGV carts for discharge and transportation. The AGV carts transport the stacked materials to the designated temporary storage racks set up in the periphery according to the expansion and contraction stacking rule instructions for temporary storage and wait for scheduling.

2. The automatic counting and stacking system for PCB cutting, grinding and drilling targets according to claim 1 is characterized in that: The temporary storage rack for the number of items to be completed adopts a double-layer multiple-carrier assembly structure with the upper layer and the lower layer aligned and stacked. The eighth carrier, the ninth carrier, the tenth carrier, the eleventh carrier and the twelfth carrier are arranged on the upper layer of the temporary storage rack for the number of items to be completed, and the thirteenth carrier, the fourteenth carrier, the fifteenth carrier, the sixteenth carrier and the seventeenth carrier are arranged on the lower layer of the temporary storage rack for the number of items to be completed. All the carriers transmit materials in both directions from right to left or from left to right, and are used for receiving waiting temporary storage of materials to be completed and caching temporary storage of materials to be stacked.

3. The automatic counting and stacking system for PCB cutting, grinding and drilling targets according to claim 1 is characterized in that: The automatic stacking machine is provided with four discharge ports A, B, C and D. The discharge ports A, B, C and D correspond to the eighteenth carrier discharge station, the nineteenth carrier discharge station, the twentieth carrier discharge station and the twenty-first carrier discharge station, respectively. The eighteenth carrier discharge station, the nineteenth carrier discharge station, the twentieth carrier discharge station and the twenty-first carrier discharge station are defined as 1 to 4 expansion and contraction ranges according to the expansion and contraction stacking rules. , or define any one of the carrier discharging stations as an NG station according to the expansion and contraction stacking rules; the automatic stacking machine determines whether stacking is needed through the MES system and according to the expansion and contraction data measured by the X-RAY drilling target machine on the cutting and grinding connection device and the expansion and contraction stacking rules, and sends instructions to the multi-axis robotic arm for stacking. The multi-axis robotic arm stacks the materials on the sixth carrier according to the expansion and contraction stacking rules and stores them at the discharging stations corresponding to the discharging ports A, B, C and D.

4. A scheduling control method for an automatic numbering and stacking system for PCB cutting, grinding and drilling targets according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, cutting and grinding connection, the cutting and grinding connection device performs X-Ray pre-alignment, cutting and grinding, corner rounding, coding, cleaning, thickness measurement and X-Ray drilling on each PCB board. The X-Ray drilling generates expansion and shrinkage test data according to the QR code, and combines with the MES system control to convert the internal code of each PCB board into an external code. After coding, the expansion and shrinkage test data information and copper thickness test information are automatically recorded; S2. Analysis and Scheduling: The overall control instructions of the automatic stacking machine are uniformly analyzed and scheduled based on the MES system. When the first carrier on the duplex displacement device receives the incoming material from the cutting and grinding connection device, the code is scanned to extract the information, and then the duplex displacement device is used to translate the PCB board on the first carrier to the second carrier for stacking. Before stacking, the seventh carrier on the rail mobile stacker is used to place the empty carrier of the flat plate; the subsequent scheduling is carried out according to the incoming material situation: S3, situation a, when the same batch of incoming materials are all in quantity and meet the conditions for stacking; The whole stack of PCB boards on the second carrier is sequentially transferred to the sixth carrier by the third carrier, the fourth carrier, and the fifth carrier on the multi-stack feeding device; Then, the code is scanned at the sixth carrier, and the scanned code information is transmitted to the MES system. The automatic stacking machine receives the stacking task. According to the instructions issued by the MES system, the multi-axis robotic arm stacks the PCB boards on the sixth carrier according to the expansion and contraction stacking rules, and stacks them to the designated 18th carrier unloading station, 19th carrier unloading station, 20th carrier unloading station and 21st carrier unloading station according to the expansion and contraction stacking rules, completing the whole batch stacking; Then, the MES system issues instructions, and the AGV moves the stacked PCB boards sorted at the 18th, 19th, 20th, and 21st platform unloading stations to the surrounding temporary storage racks for storage and waiting for transfer. At the same time, the empty carrier on the sixth platform is shifted to the seventh platform of the rail-mounted mobile stacker by the multi-axis robot arm, and the rail-mounted mobile stacker returns the empty carrier on the seventh platform to the second platform on the duplex displacement device with vacant space through the translation track, or to the eighth platform, the ninth platform, the tenth platform, the eleventh platform, the twelfth platform, the thirteenth platform, the fourteenth platform, the fifteenth platform, the sixteenth platform and the seventeenth platform with vacant space on the temporary storage rack, and temporarily stores the empty carrier, and waits for the second platform to transfer and deliver it through the seventh platform on the rail-mounted mobile stacker at any time when there is a demand; S4, case b, when the PCB board is stacked from the first carrier to the second carrier on the duplex displacement device, the incoming material value required by the MES system is not met, that is, the condition for uniform stacking is not met; The uncompleted stacked PCB boards on the second carrier position of the duplex displacement device are transferred to the third carrier on the multi-position feeding device through the second carrier, and are transferred to the seventh carrier of the rail-mounted mobile stacker at the third carrier position, and are laterally moved along the translation track by the seventh carrier to shift the uncompleted stacked PCB boards to the empty positions of the eighth carrier, the ninth carrier, the tenth carrier, the eleventh carrier, the twelfth carrier, the thirteenth carrier, the fourteenth carrier, the fifteenth carrier, the sixteenth carrier and the seventeenth carrier on the temporary storage rack to be temporarily stored and wait for completion; When encountering remaining incoming PCB boards to be assembled, the MES system will give instructions in advance, requesting the 8th carrier, the 9th carrier, the 10th carrier, the 11th carrier, the 12th carrier, the 13th carrier, the 14th carrier, the 15th carrier, the 16th carrier and the 17th carrier on the temporary storage rack to be assembled to return to the queue for assembly. At this time, the 7th carrier on the rail mobile stacker will, according to the MES system scheduling, transport the PCB boards to be stacked on the temporary storage rack to the second carrier position on the duplex displacement device for stacking. After the stacking conditions are met, continue to execute the process of situation a in step S3 and proceed to the stacking process. S5, case c, when the condition of full stacking is met, but the automatic stacking machine is performing a stacking task on the sixth platform, and at the same time, the fourth platform and the fifth platform have tasks to be stacked in order; At this time, the rule of situation b is adopted, and the completed PCB boards are transferred from the second carrier to the third carrier on the multi-stack feeding device, and are transferred to the seventh carrier of the rail-mounted mobile stacker at the third carrier, and are moved horizontally along the translation track through the seventh carrier to be transferred to the empty positions of the eighth carrier, the ninth carrier, the tenth carrier, the eleventh carrier, the twelfth carrier, the thirteenth carrier, the fourteenth carrier, the fifteenth carrier, the sixteenth carrier and the seventeenth carrier on the temporary storage rack to be completed for temporary storage, and wait for the fourth carrier, the fifth carrier and the sixth carrier to have empty positions before sorting; S6. According to the conditional logic in step S3, step S4 and step S5, through the MES system, the second carrier on the duplex displacement device and the third, fourth, fifth and sixth carriers on the multi-position feeding device, as well as the eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth and seventeenth carriers on the temporary storage rack to be completed are respectively dispatched and coordinated with the seventh carrier on the rail mobile stacker in an orderly manner, so as to realize the fully automated dispatching control of automatic numbering and stacking of PCBs after cutting, grinding and drilling.

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