Chain type integrated management system of digital factory

Abstract

The invention discloses a chain type integrated management system of a digital factory, and relates to the technical field of digital equipment management, the management system comprises a data acquisition module, a function matching module, an additional evaluation module, a maintenance adjustment module and a correction evaluation module; according to the technical key points, whether to-be-added equipment can replace machining equipment on an original production line or not is judged according to the functions of the to-be-added equipment, and the stability coefficient of the to-be-added equipment after replacement is analyzed according to the machining speed and failure rate conditions possibly caused to the production line before and after replacement of the equipment, so that the stability coefficient of the to-be-added equipment after replacement of the machining equipment of the to-be-added equipment is determined. Whether the production line can run stably or not can be judged, so that the debugging time after the to-be-added equipment is replaced is shortened, an optimal adjustment scheme can be known and formulated in advance, the time required by equipment replacement and the caused influence are reduced, the production line can still run normally after the to-be-added equipment is replaced, and the production efficiency is improved. And a production line can bring better economic benefits conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of digital equipment management, in particular to a chain-type integrated management system for a digital factory. Background Art

[0002] With the rapid development of industry and intelligent manufacturing, modern automated factories are undergoing digital transformation. In this process, the management and regulation of equipment in automated factories is particularly important. It is necessary to be able to conduct a comprehensive assessment of the impact of equipment replacement, maintenance, and upgrading in order to respond in a timely manner. Traditional manual judgment methods have problems such as large errors and low processing efficiency. These problems are particularly prominent in automated factories that pursue high efficiency and high precision. The chain integrated management system is a systematic management method that aims to improve overall efficiency by closely connecting different management objects or processes to form an efficient work chain. This management method emphasizes the close connection and efficient collaboration between various links to ensure that the entire system can operate smoothly and achieve the established goals.

[0003] At present, the existing Chinese patent with the patent application number of "CN202411268990.7" discloses a digital factory management system, which belongs to the field of factory management technology. Aiming at the needs of automated factories, the vibration signals of various components of the equipment are collected in real time through the acquisition subsystem. In the automated factory environment, the collected vibration signals are deeply processed to extract edge enhancement signals, internal edge signals and external edge signals, enhance the edge information of the signals, and highlight the internal details and external contours. Then, the signal component sequences are constructed for these three signals respectively to reflect the characteristics of each signal. The multi-layer input anomaly detection model is used to process the component sequences of the three signals respectively to obtain abnormal values, which represent the abnormal working conditions of the components. Although the processing quality score of the automated factory equipment can be obtained by combining the abnormal values ​​of each component of the equipment, it mainly focuses on the processing quality of the product, and does not involve the addition and maintenance of the processing equipment, resulting in the inability to intuitively understand the impact of the addition or maintenance on the production line, so that there is no way to respond in advance, and ultimately produce unpredictable effects; However, during the implementation of the above technical solution, it was found that there were at least the following technical problems: Lack of effective assessment of the impact of adding or overhauling processing equipment: Existing digital factories mainly improve the production accuracy of processed parts by increasing the supervision of processing equipment, but seriously ignore the impact of equipment replacement or adjustment. When equipment is added or replaced, the entire production line can only be suspended to cooperate with the equipment adjustment, which greatly affects the normal operation of the factory. Take the common engine assembly production line as an example. Since it needs to go through the following steps in sequence: "S1, install the crankshaft and camshaft; S2, install the piston connecting rod group; S3, install the cylinder head; S4, install other components; S5, final inspection and debugging", whether it is to repair the piston connecting rod installation station or install the piston connecting rod inspection station on the production line, the entire production line needs to be stopped. The line stops working, but there is no clear understanding of the impact of maintenance or additional workstations, so it can only rely on experience to judge, especially when adding new equipment. Since it is impossible to intuitively understand the impact before and after the equipment is installed, the added equipment is not compatible with the production line, and even the equipment processing efficiency is reduced. Secondly, with the continuous development of science and technology, most equipment can not only complete a single function, but can also complete and take into account multiple different functions at the same time. Therefore, for these devices, they can completely replace multiple devices on the original production line. If they cannot be understood or replaced in time, the continued use of these replaced equipment will bring unnecessary losses to the factory. For this reason, we provide a chain integrated management system for digital factories. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a chain-type integrated management system for a digital factory, which solves the problems raised in the background technology.

[0005] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: A chain-type integrated management system for a digital factory, the integrated management system comprising: The data collection module collects the functional information of the existing production lines and the processing equipment on the lines, and divides them into replaceable sets, temporarily replaceable sets and irreplaceable sets according to the degree of overlap of functions between the processing equipment; the functional information includes the processable types and the rated processing speed, failure rate and processing efficiency under different processing types; The function matching module establishes a two-dimensional coordinate system, obtains the working area and processing type of the equipment to be added, matches it with the production line, obtains the coordinates that can be added, and then uses the coordinates that can be added as the additional points to analyze the additional adaptation index of the equipment to be added at each additional point. After that, the additional points that meet the additional requirements are installed as the initial installation points of the equipment to be added. Among them, according to the functional overlap between the equipment to be added and the existing processing equipment on the line, direct addition or replacement addition is adopted. Replacement addition means that the processing equipment with overlapping functions needs to be removed while installing the equipment to be added; direct addition means that the equipment to be added is installed in the production line; After the replacement plan is determined, the evaluation module is added. The average installation time and average debugging time of the same equipment in the database are used as the installation time and debugging time of the equipment to be added. The functional information of the processing equipment on the production line behind the initial installation point is retrieved to estimate the replacement impact value of the equipment to be added at each initial installation point. The replacement impact value is compared with the preset replacement difficulty threshold. When the replacement impact value is less than the replacement difficulty threshold, the initial installation point corresponding to the replacement impact value is regarded as an addable point, and the equipment to be added is sorted from small to large according to the replacement impact value, and installed; otherwise, a non-addition instruction is issued, and the initial installation point corresponding to the replacement impact value is regarded as a non-addition point; The maintenance adjustment module obtains the replacement impact value of each processing equipment on the production line during installation, and arranges them in order from small to large. Then, the processing equipment corresponding to the replacement impact value is repaired in turn. During the maintenance, the corresponding maintenance strategy is called according to the set where the equipment to be repaired is located.

[0006] Furthermore, the production line represents a conveyor belt for conveying parts, and the parts are sorted according to the time when they pass through each processing equipment on the line as the initial detection order of the processing equipment; The function used by the processing equipment on the production line can be replaced by other equipment on the production line, and the difference in processing efficiency of the production line before and after the replacement is compared with the preset processing efficiency impact threshold. When the processing efficiency of the production line before the replacement - the processing efficiency of the production line after the replacement ≤ the processing efficiency impact threshold, the processing equipment is recorded as replaceable equipment, and the replaceable set represents the set of all replaceable equipment on the current production line; otherwise, the corresponding equipment to be added is recorded as directly added equipment, and the temporarily replaceable set represents the set of all temporarily replaceable equipment on the current production line; The non-replaceable set means that the functions used by the processing equipment on the production line cannot be replaced by other equipment on the production line.

[0007] Furthermore, the selection process of the additional coordinates is as follows: Obtain the working safety distance and processing type of the equipment to be added. The working area represents the area enclosed by the center point of the equipment to be added as the coordinate and the working safety distance as the diameter; A two-dimensional coordinate system is established with the starting point of the production line as the coordinate origin, and the dimension data of the existing processing equipment on the production line is retrieved and imported into the two-dimensional coordinate system to generate an equipment distribution map; Match the processing type of the equipment to be added with the parts production process to obtain the processing stage to which the equipment to be added belongs, and then select the additional segment on the production line according to the processing stage, and use the coordinates corresponding to the additional segment as the pre-additional coordinates of the equipment to be added, where the additional segment represents the production line between two adjacent processing equipment in the processing stage; The area enclosed by the pre-added coordinates is recorded as the origin and the working safety distance as the radius. When other equipment exists in the idle area, a warning that additional equipment cannot be added is issued. Otherwise, a warning that additional equipment can be added is issued, and the pre-added coordinates corresponding to the warning that additional equipment can be added are marked as coordinates that can be added.

[0008] Furthermore, the analysis process of adding the adaptation index is as follows: Set the safe spacing distance of the equipment to be added, denoted as d; Obtain the coordinates of the equipment at both ends of the additional segment where the additional point is located, and use the calculation formula for the distance between two points in the plane coordinate system to calculate the distance from the additional point to the equipment at both ends of the additional segment, which are recorded as ; By analyzing the formula Get the additional adaptation index of the equipment to be added at the current addition point , where represents the correction coefficient of the preset additional adaptation index, e represents the natural constant, Indicates the parts production speed of the additional section where the additional point is located. Indicates the rated processing speed of the equipment to be added. They represent the weights of the preset equipment interval ratio and processing efficiency ratio respectively, ,and , N represents the number of processing equipment within the range of the additional point distance ≤d, Indicates the impact ratio coefficient of the preset processing quantity; when When Recorded as 1; when When Recorded as 0; like , the obtained additional adaptation index is compared with the preset additional matching threshold. When the additional adaptation index is greater than or equal to the additional matching threshold, the additional point corresponding to the additional adaptation index is used as the initial installation point of the device to be added; otherwise, no response is made; like When As a new matching threshold, it is compared with the additional adaptation index. Indicates the reduction ratio of the preset additional matching threshold.

[0009] Furthermore, before the equipment to be added is installed, the equipment to be added is matched with the processing equipment according to the functional overlap between them; when the function of the equipment to be added on the production line can replace the processing equipment on the production line, the corresponding equipment to be added is recorded as replacement equipment; otherwise, the corresponding equipment to be added is recorded as direct equipment; If the equipment to be added is a direct-added equipment, a verification warning is issued, and the installation coordinates of the equipment to be added are selected based on the verification results; If the equipment to be added is replacement equipment, a replacement estimation instruction is issued; When verification warnings and replacement estimate instructions are received, the stability coefficient of the production line after the equipment to be added is estimated, and when the stability coefficient is within the preset stability balance threshold, a qualified instruction is issued, and the replaceable processing equipment on the production line is marked and replaced.

[0010] Furthermore, the formula for the stability coefficient of the production line after the equipment to be added is as follows: ;

[0011] In the formula, Indicates the stability factor of the production line after the equipment to be added is replaced. Indicates the adaptation index of the equipment to be added at the current addition point. It indicates the rated parts production speed of the production line before the additional equipment is replaced. Indicates the processing speed of the parts by the equipment to be added. Indicates the failure rate of the production line before the installation of the additional equipment. represents the average failure rate of the equipment to be added, G represents the total number of processing equipment to be replaced, represents the average failure rate of the i-th processing equipment, represents the additional adaptation index of the i-th processing equipment, They represent the weights of the preset production speed ratio and the average failure difference respectively. , , Indicates the correction factor of the preset stability factor; when the equipment to be added is a direct-added equipment, Recorded as 0; otherwise, when the device to be added is a replacement device, no response is made; The obtained stability coefficient is compared with a preset stable equilibrium interval, where the stable equilibrium interval includes a stable equilibrium upper limit value and a stable equilibrium lower limit value; When the stability coefficient is greater than the upper limit of the stable balance, an upgrade instruction is issued, the replacement data of the equipment to be added and the replacement impact value are sent to the maintenance department, and the production line feedback from the maintenance department is obtained; When the upper limit of stable balance ≥ stability coefficient ≥ lower limit of stable balance, a qualified instruction is issued, the replacement impact value is estimated, and the equipment corresponding to the function of the equipment to be added is replaced; When the lower limit value of the stable balance is greater than the stability coefficient, an unqualified instruction is issued, and the equipment to be added corresponding to the stability coefficient is recorded as directly added equipment.

[0012] Furthermore, the estimation process of the replacement impact value is as follows: Set the amount of historical data to be extracted and the data error adjustment ratio, denoted as L and η respectively; Obtain the installation time and debugging time of the previous L identical equipment to be added from the database, and record them as , , and calculate the average installation time during the first L additional installations and average debugging time ; Installation time during the current L additional installations ≥ Or debugging time ≥ When the installation time or debugging time is discarded, the number of discarded installation time data and the number of discarded debugging time data are recorded as X and Y respectively, and the average installation time after discarding the data is recalculated. and average debugging time ; Otherwise, no response; Taking the initial installation point as the dividing line, the production line is divided into the front processing production line and the rear impact production line, and the functional information of all processing equipment on the rear impact production line is obtained; By analyzing the formula Obtain the replacement impact value after the direct additional equipment is installed and replacement impact value after installation of replacement and additional equipment , where The correction coefficient of the preset direct equipment replacement impact value is expressed as follows: Indicates the correction proportional coefficient of the preset replacement and additional equipment replacement impact value, a>1, represents the average replacement time of the nth replaced processing equipment, Respectively represent the weights of the preset production time, production speed ratio and failure rate ratio, and , Indicates the stability factor of the production line before the installation of the additional equipment. Indicates the stability factor of the production line after the direct addition of equipment is installed. Indicates the stability factor of the production line after replacement and additional equipment installation. Indicates the correction proportional coefficient of the preset stability coefficient, ; The replacement impact value is compared with the preset replacement difficulty threshold.

[0013] Furthermore, the maintenance strategy is as follows: When the equipment to be repaired belongs to a replaceable set or a temporarily replaceable set, a call strategy is issued to call a device with the same function in the replaceable set or the temporarily replaceable set to replace the function of the equipment to be repaired and participate in the use of the production line, and then the equipment to be repaired is repaired; When the equipment to be repaired belongs to the area where the irreplaceable set is located, an alternating use strategy is issued to obtain additional points on the production line for equipment of the same type as the equipment to be repaired. Before the equipment to be repaired, equipment of the same type as the equipment to be repaired is added to the production line, and then the equipment to be repaired is repaired.

[0014] Furthermore, the integrated management system also includes: The correction evaluation module obtains the deviation ratio of the working parameters of the production line before and after the equipment is installed, and corrects the correction ratio coefficient when calculating the replacement impact value based on the result of comparing the deviation ratio with the preset standard deviation threshold.

[0015] Furthermore, the formula on which the deviation ratio is based is as follows: ;

[0016] In the formula, Indicates the deviation ratio after the direct additional equipment is installed. Indicates the deviation ratio after the replacement and additional equipment is installed. Indicates the actual parts production speed after the direct additional equipment is installed. Indicates the actual parts production speed after the replacement and additional equipment is installed. Indicates the actual production time after the direct additional equipment is installed. Indicates the actual production time after the replacement and additional equipment is installed. Respectively represent the weights of the preset production speed difference ratio and production time difference ratio, and , ; The obtained deviation ratio is compared with the preset standard deviation threshold. When the deviation ratio is greater than the standard deviation threshold, a correction instruction is issued. As the modified correction proportional coefficient, the correction proportional coefficient when calculating the replacement influence value is corrected; otherwise, no response is made.

[0017] (III) Beneficial effects The present invention provides a chain-type integrated management system for a digital factory, which has the following beneficial effects: The space requirements for the equipment to be added and its own functions are used as the measurement criteria to match the remaining space on the production line, so as to determine the location where the equipment to be added can be installed, provide a reference for the installation of the equipment to be added, and reduce the difficulty of equipment planning. This is then used as the basis for the subsequent addition of equipment to be added, combined with the operating conditions of different additional sections and the distance data of the processing equipment thereon, to obtain an additional adaptation index that can intuitively evaluate the adaptation between the equipment to be added and different additional sections, so as to understand whether the equipment to be added is suitable for installation in the additional section, thereby ensuring that the equipment to be added can work normally and avoiding affecting the original equipment after installation. Normal use of equipment on the production line; secondly, determine whether the equipment to be added can replace the processing equipment on the original production line according to its function, and analyze the stability coefficient after the replacement of the equipment to be added based on the processing speed and failure rate that may be caused to the production line before and after the replacement of these equipment, so as to determine whether the production line can operate stably after the equipment to be added replaces the processing equipment, thereby reducing the debugging time after the replacement of the equipment to be added, so as to know in advance and formulate the best adjustment plan to reduce the time required for equipment replacement and the impact caused, and ensure that the production line can still operate normally after the replacement of the equipment to be added, so as to facilitate the production line to bring better economic benefits.

[0018] By using the average installation time and average debugging time of the same equipment as the installation time and debugging time of the equipment to be added, and combining the rated processing speed, failure rate and processing efficiency of the processing equipment located behind the equipment to be added on the production line, a replacement impact value that can estimate the impact degree after the installation of the equipment to be added is obtained, so as to find a suitable installation location for the equipment to be added, improve the stability of the production line after the equipment to be added is installed, and at the same time, it can also judge whether the equipment to be added is suitable for addition according to the size of the replacement impact value, thereby providing a basis for the upgrade and update of the production line, preventing the production line from being unable to work normally after the equipment to be added is installed, and reducing the risks caused by the replacement of the equipment to be added. Secondly, the impact caused by the actual installation of the equipment to be added before and after can be compared to obtain the deviation ratio of the deviation degree between the estimated data and the actual data, and then calibrate and adjust the correction ratio coefficient based on which the estimated data is calculated, so that the result is constantly close to the actual installation situation of the equipment to be added, thereby improving the adaptability between the system and the equipment to be added, so as to avoid errors caused by differences in the types of equipment to be added. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flowchart of the overall process of an embodiment of the present invention; Figure 2 It is a schematic diagram of adding a segment in the embodiment of the present invention; Figure 3 This is a schematic diagram of directly adding equipment installation in an embodiment of the present invention; Figure 4 This is a schematic diagram of the installation of replacement and additional equipment in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Digital Factory (DF) is an organizational method that integrates digital technology into the manufacturing process. It simulates, evaluates and optimizes the entire production process in a computer virtual environment based on data from the entire product life cycle, and extends it to the entire product life cycle. The key features of a digital factory include: High degree of automation: Use robots, automated equipment and intelligent systems to perform production tasks and reduce human intervention.

[0022] Digital management: Integrate advanced information technology, automation technology and management methods to achieve digital management of the production process.

[0023] Production process optimization: Simulate the production process in a virtual environment to evaluate and optimize production steps to improve efficiency and quality.

[0024] Quick response to market changes: Able to quickly adapt to market changes and meet personalized customization needs3.

[0025] Communication bridge: Serves as a bridge between product design and manufacturing, helping to achieve concurrent engineering and reduce uncertainty from design to manufacturing.

[0026] Digital factory is an important part of modern Industry 4.0. By integrating digital intelligent manufacturing systems such as MES (manufacturing execution system), WMS (warehouse management system), IoT (Internet of Things), etc., it realizes comprehensive digital management of the production process. This can not only improve production efficiency and reduce costs, but also improve product quality and flexibility, and meet the needs of modern manufacturing industry for rapid response to market changes. The chain integrated management system is a systematic management method that aims to improve overall efficiency by closely connecting different management objects or processes to form an efficient work chain. This management method emphasizes the close connection and efficient coordination between various links to ensure that the entire system can operate smoothly and achieve the established goals.

[0027] However, it is found in use that the existing digital factory mainly improves the production accuracy of the processed parts by increasing the supervision of processing equipment, but seriously ignores the impact of equipment replacement or adjustment. As a result, when equipment is added or replaced, the entire production line can only be suspended to cooperate with the adjustment of the equipment, which greatly affects the normal operation of the factory. Take the common engine assembly production line as an example. Since it needs to go through the following steps in sequence: "S1, install the crankshaft and camshaft; S2, install the piston connecting rod group; S3, install the cylinder head; S4, install other components; S5, final inspection and debugging", whether it is to repair the piston connecting rod installation station or install the piston connecting rod inspection station on the production line, it is necessary The entire production line needs to stop working, but there is no clear understanding of the impact of maintenance or additional workstations, so it can only rely on experience to judge, especially when adding new equipment. Since it is impossible to intuitively understand the impact before and after the equipment is installed, the added equipment is not compatible with the production line, and even the equipment processing efficiency is reduced. Secondly, with the continuous development of science and technology, most equipment can not only complete a single function, but can also complete and take into account multiple different functions at the same time. Therefore, for these devices, they can completely replace multiple devices on the original production line. If they cannot be understood or replaced in time, the continued use of these replaced equipment will bring unnecessary losses to the factory.

[0028] In summary, it can be seen that the existing digital factories lack effective assessment of the impact of adding or overhauling processing equipment, resulting in the need to rely on experience to add, replace, install, and disassemble equipment. When performing the above operations, it is also impossible to estimate the possible impact. As a result, after equipment is replaced or installed, the production line cannot operate normally or the production line often malfunctions. These problems arise because we lack a criterion for judgment.

[0029] Example 1: Please refer to Figure 1 This embodiment provides a chain-type integrated management system for a digital factory, and the integrated management system includes: 1. Data processing Since there are many kinds of existing production lines, and both the process and processing methods are different, it is necessary to have a comprehensive understanding of the production line and the various processing equipment on the production line (here refers to the conveyor belt used to transport parts) in order to facilitate subsequent targeted processing. However, it is necessary to avoid the data required for calculation being too large, so we use the processable types of processing equipment and the rated processing speed, failure rate and processing efficiency under different processing types as the key data for judgment. Other minor data can be adjusted after the production line is assembled. The reasons for using the above parameters are as follows: The purpose of installing new equipment is to bring better economic benefits, which requires full use of the functions of the new equipment. However, in actual use, we found that with the continuous development of technology, most equipment can not only complete a single function, but can complete and take into account multiple different functions at the same time. Therefore, for these equipment, they can completely replace multiple equipment on the original production line. If they cannot be understood or replaced in time, the continued use of these replaced equipment will bring unnecessary losses to the factory. Therefore, it is inevitable to consider the "replacement" between equipment.

[0030] For example, the installation steps of the engine valve are as follows: install the intake and exhaust valves into the cylinder head; press the inner and outer valve springs into the valve spring seat; install the valve lock plate and valve spring, ensure that the valve stem tail end is covered with a sleeve and pressed against the lock plate, then stand the cylinder head sideways and evenly tap the sleeve tail end to flatten and tighten the lock plate; install the valve lock plate seat in the groove on the upper part of the valve stem and be 0.7 to 2.5 mm higher or lower than the spring seat. When the new equipment has the ability to install both the valve spring seat and the valve spring, only one device is needed to replace the original valve spring seat installation equipment and valve spring installation equipment. At this time, when installing the new equipment, it is necessary to consider the problem of replacing other equipment.

[0031] On the contrary, if the function of the new equipment is to calibrate the transport position of the engine cylinder, it is obvious that the function realized by the equipment does not overlap with the function of the existing equipment on the production line. At this time, there is no need to consider "replacement", but addition, that is, consider how to install the equipment on the production line to ensure that the position of the cylinder is balanced during transportation.

[0032] In order to facilitate screening and adjustment, it is necessary to first sort the parts according to the time they pass through each processing equipment on the line as the initial inspection order of the processing equipment. Then, according to the degree of overlap between the functions of the processing equipment, they are divided into replaceable sets, temporarily replaceable sets, and non-replaceable sets. The classification method is as follows: The functions of processing equipment on the production line can be replaced by other equipment on the production line. For example, parts need to be drilled and then tapped and cut in sequence. The drilling on the production line is done by CNC machine tools, tapping is done by common tapping machines, and cutting is done by robots. However, since the CNC machine tools themselves have the capabilities of "drilling", "cutting" and "tapping", when the tapping machine is damaged or needs to be adjusted, the "drilling" and "tapping" tasks can be completed by CNC machine tools. However, the reason why parts are cut by robots is because parts need to be processed in different directions, so using robots is better than CNC machine tools. Therefore, even if CNC machine tools have the "cutting" function, they cannot replace robot cutting.

[0033] Therefore, when determining whether a function can be replaced, the impact on the entire production line also needs to be considered. Therefore, the difference in processing efficiency of the production line before and after the replacement needs to be compared with the preset processing efficiency impact threshold. When the processing efficiency of the production line before the replacement - the processing efficiency of the production line after the replacement ≤ the processing efficiency impact threshold, the processing equipment is recorded as replaceable equipment, and the replaceable set represents the set of all replaceable equipment on the current production line; otherwise, the corresponding equipment to be added is recorded as directly added equipment, and the temporarily replaceable set represents the set of all temporarily replaceable equipment on the current production line. The non-replaceable set means that the functions used by the processing equipment on the production line cannot be replaced by other equipment on the production line.

[0034] As for the processing efficiency of the production line before and after the replacement, it refers to the speed at which the production line produces parts. The working efficiency can be tested by a single variable method, which can be carried out during the commissioning of the production line.

[0035] Before debugging: First classify the processing equipment according to its own functions. For example, a cutting machine can cut parts, a drilling machine can drill holes on the surface of parts, a tapping machine can tap inside holes, and a CNC machine tool has the capabilities of "drilling", "cutting" and "tapping". Therefore, when classifying, equipment with overlapping functions are marked as interchangeable equipment. For example, the functions of a CNC machine tool and a drilling machine overlap, and the CNC machine tool can replace the function of a drilling machine, so the two are interchangeable equipment. On the contrary, if the functions do not overlap, then replacement is not possible. For example, there is no overlap in the functions between a cutting machine and a tapping machine, so the two are not replacement equipment.

[0036] During debugging, between two devices with the same function, shut down one of the single-function processing devices and replace the function of the shut-down device with another processing device, then observe the production speed of parts on the production line; and when the two devices are working at the same time, if the production speed of parts on the production line changes little, it means that the equipment can be replaced; on the contrary, if the production speed decreases, it means that the processing equipment with multiple functions cannot replace the processing equipment with a single function.

[0037] Take CNC machine tools and drilling machines as examples. The function that CNC machine tools need to complete is cutting, while the function that drilling machines need to complete is drilling. Assume that when both are used to drill parts at the same time, the production speed of parts on the production line is 5 parts per minute; turn off the drilling machine, rely on CNC machine tools to replace drilling equipment to drill and cut parts, calculate the production speed of parts on the production line, if the processing speed on the production line after replacement is 2 parts per minute, it can be seen that replacing drilling machines with CNC machine tools will seriously affect the processing speed of the equipment; on the contrary, if the processing speed on the production line after replacement is 5 or 6 parts per minute, it means that the speed of the production line is not greatly affected after replacement, so it can be replaced. In this way, CNC machine tools can replace drilling machines.

[0038] 2. Installation location selection 21. Selection of installation location When installing new equipment, the main problem is the installation location of the new equipment. In order to find a suitable location for the equipment to work, it is necessary to first establish a two-dimensional coordinate system, and then match the working area and processing type of the equipment to be added with the production line to obtain the coordinates that can be added. The selection process of the coordinates that can be added is as follows: Step 1: Get the working safety distance and processing type of the equipment to be added. The working area represents the area enclosed by the center point of the equipment to be added and the working safety distance as the diameter. Taking the CNC machine tool as an example, its footprint is 268cm long and 163cm wide. If the data machine tool needs to operate safely and stably, it is necessary to ensure that no other equipment exists within 50cm on both sides and behind the data machine tool and 100cm in front of the data machine tool. In this way, the safety area of ​​the data machine tool is a rectangular space with a length of 268cm+50cm (left side)+50cm (right side)=368cm and a width of 163cm+50cm (back)+100cm (front)=313cm. The working safety distance is the length of the hypotenuse, that is, ; The processing type is the function that the equipment needs to use on the production line, for example, cutting function; Step 2: Establish a two-dimensional coordinate system with the starting point of the production line as the coordinate origin, retrieve the dimension data of the existing processing equipment on the production line, import it into the two-dimensional coordinate system, and generate an equipment distribution map, such as Figure 2 As shown; Step 3: Match the processing type of the equipment to be added with the parts production process to obtain the processing stage to which the equipment to be added belongs, so that the equipment to be added can be installed in the corresponding position according to its function; for example, a tapping machine can only be used after drilling. If it is placed before drilling, it cannot realize its own function; Step 4: Use the conveyor belt that meets the additional requirements as the additional section, so that the coordinates of the additional section can be used as the pre-additional coordinates of the equipment to be added, where the additional section represents the production line between two adjacent processing equipment in the processing stage; Step 5: Take the pre-added coordinates as the origin and the working safety distance as the radius. The enclosed area is recorded as the idle area. If there are other equipment in the idle area, a warning that additional equipment cannot be added is issued. Otherwise, a warning that additional equipment can be added is issued, and the pre-added coordinates corresponding to the warning that additional equipment can be added are marked as coordinates that can be added.

[0039] The coordinates that can be added using this method indicate that the equipment to be added can be installed at this coordinate point, not the most suitable one. That is, the remaining space in the area where this coordinate point is located on the production line can be used to place the equipment to be added. Figure 2 shown.

[0040] 22. Compatibility test After obtaining the coordinates that can be added, the coordinates that can be added are used as the additional points of the equipment to be added. Then, the additional adaptation index of the equipment to be added at each additional point can be analyzed to evaluate whether the additional point is suitable for installing the equipment to be added. This can provide a basis for the installation of the equipment to be added and facilitate subsequent installation. Before calculating the additional adaptation index, it is necessary to set the safe spacing distance d of the equipment to be added. Then, the equipment coordinates at both ends of the additional segment where the additional point is located are obtained, and the calculation formula for the distance between two points in the plane coordinate system is used to calculate the distance from the additional point to the equipment at both ends of the additional segment, which are recorded as The formula is as follows: ;

[0041] In the formula, Indicates the coordinates of the selected additional points. , Respectively represent the coordinates of the equipment at both ends of the extension section. The additional adaptation index is calculated based on the following formula: ;

[0042] In the formula, Indicates the adaptation index of the equipment to be added at the current addition point. represents the correction coefficient of the preset additional adaptation index, e represents the natural constant, recorded as d, Indicates the parts production speed of the additional section where the additional point is located. Indicates the rated processing speed of the equipment to be added. They represent the weights of the preset equipment interval ratio and processing efficiency ratio respectively, ,and , N represents the number of processing equipment within the range of the additional point distance ≤d, Indicates the impact ratio coefficient of the preset processing quantity; when When Recorded as 1; when When Recorded as 0.

[0043] like , the obtained additional adaptation index is compared with the preset additional matching threshold. When the additional adaptation index is greater than or equal to the additional matching threshold, the additional point corresponding to the additional adaptation index is used as the initial installation point of the device to be added; otherwise, no response is made; like When As a new matching threshold, it is compared with the additional adaptation index. Indicates the reduction ratio of the preset additional matching threshold.

[0044] 23. Equipment classification Before the installation of the equipment to be added, direct addition or replacement addition is adopted according to the functional overlap between the equipment to be added and the existing processing equipment on the line. Replacement addition means that the processing equipment with overlapping functions needs to be removed while the equipment to be added is installed. For example, the equipment to be added is a CNC machine tool, which can perform "drilling", "cutting" and "tapping". Therefore, the drilling machine with "drilling" function and the tapping machine with "tapping" function can be removed from the production line while the CNC machine tool is installed; direct addition means that the equipment to be added is installed in the production line, while the original processing equipment on the production line remains unchanged. For example, the equipment to be added is a CNC machine tool, although it can perform the function of "cutting", it cannot replace the "cutting" operation performed by the robot, and therefore cannot be replaced.

[0045] When the function of the equipment to be added on the production line can replace the processing equipment on the production line, the corresponding equipment to be added is recorded as replacement equipment, which means that both are replaceable equipment and the impact on the production line after replacement can be ignored, as shown in the last paragraph of "Data Processing"; otherwise, the corresponding equipment to be added is recorded as direct equipment, which means that it cannot be replaced. This is because if replaced, it will affect the parts production speed of the production line. Therefore, this type of equipment can only be installed on the production line and cannot replace other equipment on the production line.

[0046] If the equipment to be added is a direct-added equipment, a verification warning is issued, and the installation coordinates of the equipment to be added are selected based on the verification results; If the equipment to be added is replacement equipment, a replacement estimation instruction is issued.

[0047] 24. Stability Assessment In order to ensure that the equipment to be added will not cause too much impact on the equipment after installation and can meet the needs of production operation, when receiving the verification warning and replacement estimation instructions, it is necessary to estimate the stability coefficient of the production line after the equipment to be added is replaced, and when the stability coefficient is within the preset stable balance threshold, issue a qualified instruction and mark the replaceable processing equipment on the production line to replace the processing equipment. In this way, it can be understood that the installation of the equipment to be added at this location will not affect the normal operation of the production line and can be installed with confidence. The formula for the stability coefficient of the production line after the equipment to be added is replaced is as follows: ;

[0048] In the formula, Indicates the stability factor of the production line after the equipment to be added is replaced. Indicates the adaptation index of the equipment to be added at the current addition point. It indicates the rated parts production speed of the production line before the additional equipment is replaced. Indicates the processing speed of the parts by the equipment to be added. Indicates the failure rate of the production line before the installation of the additional equipment. represents the average failure rate of the equipment to be added, G represents the total number of processing equipment to be replaced, represents the average failure rate of the i-th processing equipment, represents the additional adaptation index of the i-th processing equipment, They represent the weights of the preset production speed ratio and the average failure difference respectively. , , Indicates the correction factor of the preset stability factor; when the equipment to be added is a direct-added equipment, Recorded as 0; otherwise, when the device to be added is a replacement device, no response is made; In order to ensure that the production line can operate normally or efficiently after the installation of the additional equipment, it is also necessary to compare the obtained stability coefficient with the preset stable balance interval, which includes the stable balance upper limit value (indicating the critical value that can improve the production efficiency of the production line) and the stable balance lower limit value (indicating the critical value that will reduce the production efficiency of the production line); When the stability coefficient is greater than the upper limit of the stability balance, it means that after the equipment to be added replaces other processing equipment on the original production line, the production line can still operate very stably, which will not affect the production line and improve the production efficiency of the production line. Therefore, when the stability reaches this level, an upgrade command is issued to send the replacement data of the equipment to be added and the replacement impact value to the maintenance department, and obtain the production line feedback from the maintenance department, so as to provide reference for the subsequent upgrade of the maintenance department; When the upper limit of stable balance ≥ stability coefficient ≥ lower limit of stable balance, it means that the impact on the production line after the equipment to be added replaces other processing equipment on the original production line is not significant and is still within the tolerance range of the production line. At this time, it is necessary to issue a qualified instruction, estimate the replacement impact value, and replace the equipment corresponding to the function of the equipment to be added, thereby reducing the number of processing equipment used on the production line, bringing better economic benefits and improving resource utilization; When the lower limit value of the stable balance is greater than the stability coefficient, it means that the equipment to be added will replace other processing equipment on the original production line, which will have a very large impact on the production line and is not suitable for replacement. It is necessary to issue an unqualified instruction and record the equipment to be added corresponding to the stability coefficient as directly added equipment, and then install it according to the plan for directly added equipment.

[0049] 3. Adding impact value After the replacement plan is determined, the average installation time and average debugging time of the same equipment in the database are used as the installation time and debugging time of the equipment to be added, and the functional information of the processing equipment on the production line behind the initial installation point is retrieved to estimate the replacement impact value of the equipment to be added at each initial installation point. When calculating the replacement impact value, a certain amount of data needs to be obtained from the database first.

[0050] Obtain the installation time and debugging time of the previous L identical equipment to be added from the database, and record them as , , and calculate the average installation time during the first L additional installations and average debugging time ; Installation time during the current L additional installations ≥ Or debugging time ≥ When the installation time or debugging time is discarded, the number of discarded installation time data and the number of discarded debugging time data are recorded as X and Y respectively, and the average installation time after discarding the data is recalculated. and average debugging time Otherwise, no response is made. The historical data extraction amount L and the data error adjustment ratio η can be set before calculation.

[0051] Afterwards, the initial installation point is used as the dividing line, and the production line is divided into the front processing production line (the production line before the initial installation point) and the rear impact production line (the production line after the initial installation point) according to the processing order of the parts on the production line, and the functional information of all processing equipment on the rear impact production line is obtained; (3-1) (3-2) (3-3) (3-4) In formulas (3-1) to (3-4), It represents the replacement impact value after the direct additional equipment is installed. It represents the replacement impact value after the replacement and additional equipment is installed. The correction coefficient of the preset direct equipment replacement impact value is expressed as follows: Indicates the correction proportional coefficient of the preset replacement and additional equipment replacement impact value, a>1, represents the average replacement time of the nth replaced processing equipment, Respectively represent the weights of the preset production time, production speed ratio and failure rate ratio, and , Indicates the stability factor of the production line before the installation of the additional equipment. Indicates the stability factor of the production line after the direct addition of equipment is installed. Indicates the stability factor of the production line after replacement and additional equipment installation. Indicates the correction proportional coefficient of the preset stability coefficient, ; The replacement impact value is compared with the preset replacement difficulty threshold. When the replacement impact value is less than the replacement difficulty threshold, the initial installation point corresponding to the replacement impact value will be regarded as an additional point, and the additional equipment will be installed in ascending order according to the replacement impact value. Otherwise, a non-addition instruction will be issued, and the initial installation point corresponding to the replacement impact value will be regarded as a non-addition point.

[0052] 4. Equipment maintenance The replacement impact value of each processing equipment on the production line is obtained when it is installed, and it is arranged in order from small to large. Then, the processing equipment corresponding to the replacement impact value is repaired in turn, and the corresponding maintenance strategy is adopted according to the set of equipment to be repaired.

[0053] like Figure 3 As shown, when the equipment to be repaired belongs to a replaceable set or a temporarily replaceable set, a calling strategy is issued to call a device with the same function in the replaceable set or the temporarily replaceable set to replace the function of the equipment to be repaired and participate in the use of the production line, and then the equipment to be repaired is repaired; like Figure 4 As shown, when the equipment to be repaired belongs to the area where the irreplaceable set is located, an alternating use strategy is issued to obtain the available additional points of equipment of the same type as the equipment to be repaired on the production line. Before the equipment to be repaired is repaired, the equipment of the same type as the equipment to be repaired is first added to the production line, and then the equipment to be repaired is repaired.

[0054] 5. Data Correction Since the average installation time and average debugging time of the same equipment in the database are used as the installation time and debugging time of the equipment to be added, rather than the actual data of the equipment to be added, in addition, part of the data relied on in the replacement impact value calculation process is derived data (that is, derived based on the usage of existing equipment), but even the same equipment may have different situations. Therefore, it is impossible to truly evaluate the usage of the production line. It is necessary to make corrections based on the actual conditions of different production lines so that the results are constantly approaching the actual installation conditions of the equipment to be added, thereby improving the adaptability between the system and the equipment to be added, and avoiding errors caused by differences in the types of equipment to be added. The deviation ratio of the working parameters of the production line before and after the equipment is installed is obtained, and the correction ratio coefficient is corrected when calculating the replacement impact value according to the comparison result of the deviation ratio with the preset standard deviation threshold. The formula based on the deviation ratio is as follows: ; ;

[0055] In the formula, Indicates the deviation ratio after the direct additional equipment is installed. Indicates the deviation ratio after the replacement and additional equipment is installed. Indicates the actual parts production speed after the direct additional equipment is installed. Indicates the actual parts production speed after the replacement and additional equipment is installed. Indicates the actual production time after the direct additional equipment is installed. Indicates the actual production time after the replacement and additional equipment is installed. Respectively represent the weights of the preset production speed difference ratio and production time difference ratio, and , ; The obtained deviation ratio is compared with the preset standard deviation threshold. When the deviation ratio is greater than the standard deviation threshold, a correction instruction is issued. As the modified correction proportional coefficient, the correction proportional coefficient when calculating the replacement influence value is corrected; otherwise, no response is made.

[0056] The weight coefficient is determined by the coefficient of variation method, which is a method of weighting each indicator according to the degree of variation between the current value of each evaluation indicator and the target value. If the numerical difference of an indicator is large, it can clearly distinguish the evaluated objects, indicating that the indicator has rich discrimination information, and thus the indicator should be given a larger weight. On the contrary, if the numerical difference of each evaluated object on a certain indicator is small, then the ability of this indicator to distinguish the evaluation objects is weak, and thus the indicator should be given a smaller weight. This method directly uses the information contained in each indicator to obtain the weight of the indicator through calculation, so it is objective.

[0057] Embodiment 2: Based on Embodiment 1, this embodiment further provides a chain integrated management system for a digital factory, including the following specific steps: Collect the functional information of existing production lines and each processing equipment on the lines, and divide them into replaceable sets, temporarily replaceable sets and non-replaceable sets according to the degree of overlap of functions between processing equipment; the functional information includes the processable types and the rated processing speed, failure rate and processing efficiency under different processing types; Establish a two-dimensional coordinate system, obtain the working area and processing type of the equipment to be added, match it with the production line, obtain the coordinates that can be added, and then use the coordinates that can be added as the additional points to analyze the additional adaptation index of the equipment to be added at each additional point. Then, the additional points that meet the additional requirements will be installed as the initial installation points of the equipment to be added. Among them, according to the functional overlap between the equipment to be added and the existing processing equipment on the line, direct addition or replacement addition is adopted. Replacement addition means that the processing equipment with overlapping functions needs to be removed while installing the equipment to be added; direct addition means that the equipment to be added is installed in the production line; After the replacement plan is determined, the average installation time and average commissioning time of the same equipment in the database are used as the installation time and commissioning time of the equipment to be added, and the functional information of the processing equipment on the production line behind the initial installation point is retrieved to estimate the replacement impact value of the equipment to be added at each initial installation point; The replacement impact value is compared with the preset replacement difficulty threshold. When the replacement impact value is less than the replacement difficulty threshold, the initial installation point corresponding to the replacement impact value is regarded as an addable point, and the equipment to be added is sorted from small to large according to the replacement impact value, and installed; otherwise, a non-addition instruction is issued, and the initial installation point corresponding to the replacement impact value is regarded as a non-addition point; Obtain the replacement impact value of each processing equipment on the production line when it is installed, and arrange them in order from small to large. Then, repair the processing equipment corresponding to the replacement impact value in turn, and adopt the corresponding maintenance strategy according to the set of equipment to be repaired; Obtain the deviation ratio of the working parameters of the production line before and after the equipment is installed, and calibrate the correction ratio coefficient when calculating the replacement impact value based on the result of comparing the deviation ratio with the preset standard deviation threshold.

[0058] In the application, the several formulas involved are all calculated by taking their numerical values ​​after removing the dimensions, and the formulas are established by collecting a large amount of data and performing software simulation to obtain a formula for the most recent actual situation. Some coefficients or weights in the formulas are set by technical personnel in this field according to actual conditions, so they will not be elaborated here.

[0059] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. A person of ordinary skill in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution.

[0060] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0061] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A chain integrated management system for a digital factory, characterized in that: The integrated management system includes: The data collection module collects the functional information of the existing production lines and the processing equipment on the lines, and divides them into replaceable sets, temporarily replaceable sets and irreplaceable sets according to the degree of overlap of functions between the processing equipment; the functional information includes the processable types and the rated processing speed, failure rate and processing efficiency under different processing types; The function matching module establishes a two-dimensional coordinate system, obtains the working area and processing type of the equipment to be added, matches it with the production line, obtains the coordinates that can be added, and then uses the coordinates that can be added as the additional points to analyze the additional adaptation index of the equipment to be added at each additional point. After that, the additional points that meet the additional requirements are installed as the initial installation points of the equipment to be added. Among them, according to the functional overlap between the equipment to be added and the existing processing equipment on the line, direct addition or replacement addition is adopted. Replacement addition means that the processing equipment with overlapping functions needs to be removed while installing the equipment to be added; direct addition means that the equipment to be added is installed in the production line; After the replacement plan is determined, the evaluation module is added. The average installation time and average debugging time of the same equipment in the database are used as the installation time and debugging time of the equipment to be added. The functional information of the processing equipment on the production line behind the initial installation point is retrieved to estimate the replacement impact value of the equipment to be added at each initial installation point. The replacement impact value is compared with the preset replacement difficulty threshold. When the replacement impact value is less than the replacement difficulty threshold, the initial installation point corresponding to the replacement impact value is regarded as an addable point, and the equipment to be added is sorted from small to large according to the replacement impact value, and installed; otherwise, a non-addition instruction is issued, and the initial installation point corresponding to the replacement impact value is regarded as a non-addition point; The maintenance adjustment module obtains the replacement impact value of each processing equipment on the production line during installation, and arranges them in order from small to large. Then, the processing equipment corresponding to the replacement impact value is repaired in turn. During the maintenance, the corresponding maintenance strategy is called according to the set where the equipment to be repaired is located.

2. According to claim 1, a chain integrated management system for a digital factory is characterized by: The production line represents a conveyor belt for conveying parts, and the parts are sorted according to the time when they pass through each processing equipment on the line as the initial inspection order of the processing equipment; The function of the processing equipment on the production line can be replaced by other equipment on the production line, and the difference in processing efficiency of the production line before and after the replacement is compared with the preset processing efficiency impact threshold. When the processing efficiency of the production line before the replacement - the processing efficiency of the production line after the replacement ≤ the processing efficiency impact threshold, the processing equipment is recorded as replaceable equipment, and the replaceable set represents the set of all replaceable equipment on the current production line; otherwise, the corresponding equipment to be added is recorded as directly added equipment, and the temporarily replaceable set represents the set of all temporarily replaceable equipment on the current production line; The non-replaceable set means that the functions used by the processing equipment on the production line cannot be replaced by other equipment on the production line.

3. The chain integrated management system of a digital factory according to claim 1, characterized in that: The process of selecting the coordinates that can be added is as follows: Obtain the working safety distance and processing type of the equipment to be added. The working area represents the area enclosed by the center point of the equipment to be added as the coordinate and the working safety distance as the diameter; A two-dimensional coordinate system is established with the starting point of the production line as the coordinate origin, and the dimension data of the existing processing equipment on the production line is retrieved and imported into the two-dimensional coordinate system to generate an equipment distribution map; Match the processing type of the equipment to be added with the parts production process to obtain the processing stage to which the equipment to be added belongs, and then select the additional segment on the production line according to the processing stage, and use the coordinates corresponding to the additional segment as the pre-additional coordinates of the equipment to be added, where the additional segment represents the production line between two adjacent processing equipment in the processing stage; The area enclosed by the pre-added coordinates is recorded as the origin and the working safety distance as the radius. When other equipment exists in the idle area, a warning that additional equipment cannot be added is issued. Otherwise, a warning that additional equipment can be added is issued, and the pre-added coordinates corresponding to the warning that additional equipment can be added are marked as coordinates that can be added.

4. The chain integrated management system of a digital factory according to claim 3, characterized in that: The analysis process of adding the adaptation index is as follows: Set the safe spacing distance of the equipment to be added, denoted as d; Obtain the coordinates of the equipment at both ends of the additional segment where the additional point is located, and use the calculation formula for the distance between two points in the plane coordinate system to calculate the distance from the additional point to the equipment at both ends of the additional segment, which are recorded as ; By analyzing the formula Get the additional adaptation index of the equipment to be added at the current addition point , where represents the correction coefficient of the preset additional adaptation index, e represents the natural constant, Indicates the parts production speed of the additional section where the additional point is located. Indicates the rated processing speed of the equipment to be added. They represent the weights of the preset equipment interval ratio and processing efficiency ratio respectively, ,and , N represents the number of processing equipment within the range of the additional point distance ≤d, Indicates the impact ratio coefficient of the preset processing quantity; when When Recorded as 1; when When Recorded as 0; like , the obtained additional adaptation index is compared with the preset additional matching threshold, and when the additional adaptation index ≥ the additional matching threshold, the additional point corresponding to the additional adaptation index is used as the initial installation point of the device to be added; Otherwise, no response will be made; like When As a new matching threshold, it is compared with the additional adaptation index. Indicates the reduction ratio of the preset additional matching threshold.

5. The chain integrated management system of a digital factory according to claim 4, characterized in that: Before the installation of the equipment to be added, the equipment to be added and the processing equipment are matched according to the functional overlap between them; when the function of the equipment to be added on the production line can replace the processing equipment on the production line, the corresponding equipment to be added is recorded as replacement equipment; otherwise, the corresponding equipment to be added is recorded as direct equipment; If the equipment to be added is a direct-added equipment, a verification warning is issued, and the installation coordinates of the equipment to be added are selected based on the verification results; If the equipment to be added is replacement equipment, a replacement estimation instruction is issued; When verification warnings and replacement estimate instructions are received, the stability coefficient of the production line after the equipment to be added is estimated, and when the stability coefficient is within the preset stability balance threshold, a qualified instruction is issued, and the replaceable processing equipment on the production line is marked and replaced.

6. The chain integrated management system of a digital factory according to claim 5, characterized in that: The formula for the stability coefficient of the production line after the replacement of the equipment to be added is as follows: ； In the formula, Indicates the stability factor of the production line after the equipment to be added is replaced. Indicates the adaptation index of the equipment to be added at the current addition point. It indicates the rated parts production speed of the production line before the additional equipment is replaced. Indicates the processing speed of the parts by the equipment to be added. Indicates the failure rate of the production line before the installation of the additional equipment. represents the average failure rate of the equipment to be added, G represents the total number of processing equipment to be replaced, represents the average failure rate of the i-th processing equipment, represents the additional adaptation index of the i-th processing equipment, They represent the weights of the preset production speed ratio and the average failure difference respectively. , , Indicates the correction factor of the preset stability factor; when the equipment to be added is a direct-added equipment, Recorded as 0; otherwise, when the device to be added is a replacement device, no response is made; The obtained stability coefficient is compared with a preset stable equilibrium interval, where the stable equilibrium interval includes a stable equilibrium upper limit value and a stable equilibrium lower limit value; When the stability coefficient is greater than the upper limit of the stable balance, an upgrade instruction is issued, the replacement data of the equipment to be added and the replacement impact value are sent to the maintenance department, and the production line feedback from the maintenance department is obtained; When the upper limit of stable balance ≥ stability coefficient ≥ lower limit of stable balance, a qualified instruction is issued, the replacement impact value is estimated, and the equipment corresponding to the function of the equipment to be added is replaced; When the lower limit value of the stable balance is greater than the stability coefficient, an unqualified instruction is issued, and the equipment to be added corresponding to the stability coefficient is recorded as directly added equipment.

7. The chain integrated management system of a digital factory according to claim 6, characterized in that: The estimation process of the replacement impact value is as follows: Set the amount of historical data to be extracted and the data error adjustment ratio, denoted as L and η respectively; Obtain the installation time and debugging time of the previous L identical equipment to be added from the database, and record them as , , and calculate the average installation time during the first L additional installations and average debugging time ; The installation time of the current L additional installations is ≥ Or debugging time ≥ When the installation time or debugging time is discarded, the number of discarded installation time data and the number of discarded debugging time data are recorded as X and Y respectively, and the average installation time after discarding the data is recalculated. and average debugging time ; Otherwise, no response; Taking the initial installation point as the dividing line, the production line is divided into the front processing production line and the rear impact production line, and the functional information of all processing equipment on the rear impact production line is obtained; By analyzing the formula Obtain the replacement impact value after the direct additional equipment is installed and replacement impact value after installation of replacement and additional equipment , where The correction coefficient of the preset direct equipment replacement impact value is expressed as follows: Indicates the correction proportional coefficient of the preset replacement and additional equipment replacement impact value, a>1, represents the average replacement time of the nth replaced processing equipment, Respectively represent the weights of the preset production time, production speed ratio and failure rate ratio, and , Indicates the stability factor of the production line before the installation of the additional equipment. Indicates the stability factor of the production line after the direct addition of equipment is installed. Indicates the stability factor of the production line after replacement and additional equipment installation. Indicates the correction proportional coefficient of the preset stability coefficient, ; The replacement impact value is compared with the preset replacement difficulty threshold.

8. The chain integrated management system of a digital factory according to claim 1, characterized in that: The maintenance strategy is as follows: When the equipment to be repaired belongs to a replaceable set or a temporarily replaceable set, a call strategy is issued to call a device with the same function in the replaceable set or the temporarily replaceable set to replace the function of the equipment to be repaired and participate in the use of the production line, and then the equipment to be repaired is repaired; When the equipment to be repaired belongs to the area where the irreplaceable set is located, an alternating use strategy is issued to obtain additional points on the production line for equipment of the same type as the equipment to be repaired. Before the equipment to be repaired, equipment of the same type as the equipment to be repaired is added to the production line, and then the equipment to be repaired is repaired.

9. The chain integrated management system of a digital factory according to claim 1, characterized in that: The integrated management system also includes: The correction evaluation module obtains the deviation ratio of the working parameters of the production line before and after the equipment is installed, and corrects the correction ratio coefficient when calculating the replacement impact value based on the result of comparing the deviation ratio with the preset standard deviation threshold.

10. The chain integrated management system of a digital factory according to claim 9, characterized in that: The calculation of the deviation ratio is based on the following formula: ； In the formula, Indicates the deviation ratio after the direct additional equipment is installed. Indicates the deviation ratio after the replacement and additional equipment is installed. Indicates the actual parts production speed after the direct additional equipment is installed. Indicates the actual parts production speed after the replacement and additional equipment is installed. Indicates the actual production time after the direct additional equipment is installed. Indicates the actual production time after the replacement and additional equipment is installed. Respectively represent the weights of the preset production speed difference ratio and production time difference ratio, and , ; The obtained deviation ratio is compared with the preset standard deviation threshold. When the deviation ratio is greater than the standard deviation threshold, a correction instruction is issued. As the modified correction proportional coefficient, the correction proportional coefficient when calculating the replacement influence value is corrected; Otherwise, no response will be given.

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