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SMT workshop implementation process informatization
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SMT workshop implementation process informatization

SMT workshop implementation process informatization
During the implementation of enterprise information construction, SMT workshop needs to mine information and data that can improve production level and management ability, and present them orderly to employees for decision-making, and can automatICally intervene in the production process in the program The implementation mainly needs to achieve the following management effects:
1. Production site management is transparent.
2. Control the distribution status of WIP in real time.
3. Track all links of the production site.
4. Prevent wrong material, operation and flow direction during product processing.
5. Provide real-time and accurate production performance analysis report of the production unit.
6. Automatically collect various on-site data to reduce the cost of manpower collection.
7. Be able to provide enterprise customers with reports proving the level of process management.
8. Supervise the operation of equipment in SMT workshop and provide various equipment management reports.
First, the first process is the suction cup, which can also be regarded as the feed. The function of the board suction machine is to suck PCB boards to the conveyor belt of the production line. From the perspective of implementation, the information flow through is mainly echo information, such as which boards of directors have been voted, when and who will implement the actions of the board of directors. Of course, these PCB boards also carry a lot of information, which can also be said to be the content of PCB boards, usually including board number, model, supplier and manufacturing order/work order.


Manufacturing order/work order is a very important information flow in the whole workshop execution process. It is also the subject of many information that needs to be attached or stored, such as routing, inspection items/processes of each operation, production lines, key components, bill of materials, equipment parameters and many other execution parameters Of course, for manufacturing execution systems, it is not better to have more execution parameters. Sometimes too many execution parameters will limit the production speed to some extent, which requires specific analysis For example, you can control the speed of suction cups. When the speed is not appropriate, the manufacturing execution system will intervene But in general, the execution information of the suction cup only needs to be related to the feed rate, time and license plate number
Solder paste printing, in short, is to apply solder paste to the corresponding position on the PCB. This is the first process after the PCB board is sent to the conveyor belt, and also the first process to actually start processing. Materials and tools required for solder paste printing include solder paste, steel plate, scraper, paper scraper, dust-free paper, cleaning agent, stirring knife, etc. These materials and tools have their own strict implementation standards and standards in the production process. For example, solder paste: is the cooling of solder paste controlLED by the first in first out pipeline? Is the cooling temperature of solder paste within the range recommended by the manufacturer? Do you check whether the temperature recorded in the freezer is within the specified storage temperature limit? Is there a file and record of the effective date and time of opening solder paste at ambient temperature? Are there files and records on the validity period and time of unopened solder paste at ambient temperature? Is there evidence that the operator filled in the information correctly and fully understood the whole process? What is the maximum allowed time for the solder paste to stay on the circuit board before recording reflow soldering? Has the regulation been understood and implemented? Is the batch number of solder paste recorded? Can the serial number of a single product be traced easily? Wait for a series of solder paste implementation regulations. Obviously, whether these execution standards need to be fully integrated into the information flow of the manufacturing execution system and how to make the system information have a positive impact on the use of solder paste are issues that information builders and enterprises need to discuss together. In general, the information such as solder paste opening time, refrigeration time and temperature has obvious advantages for operators. In addition to information about data and tools, the entire solder paste printing process/process also has quality information, such as its own printing operator, time and plate number, and the thickness of solder paste after printing.
Component patch, whose function is to accurately install surface mount components to the fixed position of PCB This is the core process/program surface mounting process, and also the link most prone to quality problems The data and tools to be prepared mainly include: data, feeding system, and mounting machine At present, most information exists in the form of reels The reel is formed by winding the reel Each reel is also the SMAllest packaging unit through which data can be traced The material is loaded into the feeding system (such as Fed The key points of component placement are: first, components cannot make mistakes; second, placement cannot make mistakes; third, minimize downtime and discard data
Visual inspection and AOI. AOI (Automatic Optical Inspection) is the abbreviation of automatic optical inspection. The name of the equipment used is AOI equipment. Its main function is to automatically check the quality of PCB boards through optical principles. The price of AOI equipment needs tens of millions of yuan. In this case, AOI equipment that cannot generate additional value and is expensive is not available in all SMT workshops, and not every production line is equipped with this equipment. Each production line is equipped with more equipment, mainly for visual inspection. Here, the author only uses AOI devices to describe how quality information plays its role in the manufacturing execution system. Quality, as the life of a brand or even a company, should not be sloppy. There is no doubt that quality information enters the manufacturing execution system. The main disadvantages of Surface Mount Technology are: throwing, missing parts, displacement, short circuit, faulty welding, white pouring, upright, weld bead, etc. There will be causes for defects and corresponding quality inspection items. Most companies report quality data once a day before manufacturing execution. After the quality personnel sort the quality data, they can draw the control chart and calculate Cpk. However, they can no longer intervene when abnormal process is found... It needs to be checked. Real time collection of information generated in the process brings immediate benefits to management. AOI equipment needs to be connected with manufacturing execution system to realize real-time and accurate integration of information. At present, most visual inspection methods are to make bad information into barcode and print it on the list. The visual inspector scans the circuit board number during inspection, and if it is bad, scans its corresponding bad information barcode. The system will immediately reflect these data on various quality control charts, and the quality department will take corresponding measures according to the real-time charts. Quality inspection information generally includes: plate number, time, inspector, defective items, defective quantity, etc.
Unlike most industries, SMT maintenance is a complex skill that requires maintenance equipment and personnel of corresponding level or qualification For the manufacturing execution system, the specific implementation process of maintenance may not be intervened, but the access to the knowledge accumulation of maintenance methods, the review of repair qualifications, the tracking of maintenance replacement parts, the statistics of maintenance efficiency, and the maintenance return process cannot be relaxed Task
Of course, the above is not SMT workshop Maybe you think that the work instructions need to be displayed in front of the operator in real time Maybe your company's packaging and transportation execution process needs more control, or you are engaged in heavy industry and military transformation process It hurts my brain, wait How to control and manage the SMT workshop? I think we need our information workers to go deep into the front line, go deep into the scene, and really think from the perspective of customers, so that information technology can better serve enterprise management
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